SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl4965-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 /*
  31  * NOTE:  This file (iwl-base.c) is used to build to multiple hardware targets
  32  * by defining IWL to either 3945 or 4965.  The Makefile used when building
  33  * the base targets will create base-3945.o and base-4965.o
  34  *
  35  * The eventual goal is to move as many of the #if IWL / #endif blocks out of
  36  * this file and into the hardware specific implementation files (iwl-XXXX.c)
  37  * and leave only the common (non #ifdef sprinkled) code in this file
  38  */
  39
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/version.h>
  43 #include <linux/init.h>
  44 #include <linux/pci.h>
  45 #include <linux/dma-mapping.h>
  46 #include <linux/delay.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/wireless.h>
  50 #include <linux/firmware.h>
  51 #include <linux/skbuff.h>
  52 #include <linux/netdevice.h>
  53 #include <linux/etherdevice.h>
  54 #include <linux/if_arp.h>
  55
  56 #include <net/ieee80211_radiotap.h>
  57 #include <net/mac80211.h>
  58
  59 #include <asm/div64.h>
  60
  61 #define IWL 4965
  62
  63 #include "iwlwifi.h"
  64 #include "iwl-4965.h"
  65 #include "iwl-helpers.h"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 u32 iwl_debug_level;
  69 #endif
  70
  71 /******************************************************************************
  72  *
  73  * module boiler plate
  74  *
  75  ******************************************************************************/
  76
  77 /* module parameters */
  78 int iwl_param_disable_hw_scan;
  79 int iwl_param_debug;
  80 int iwl_param_disable;      /* def: enable radio */
  81 int iwl_param_antenna;      /* def: 0 = both antennas (use diversity) */
  82 int iwl_param_hwcrypto;     /* def: using software encryption */
  83 int iwl_param_qos_enable = 1;
  84 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
  85
  86 /*
  87  * module name, copyright, version, etc.
  88  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  89  */
  90
  91 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  92
  93 #ifdef CONFIG_IWLWIFI_DEBUG
  94 #define VD "d"
  95 #else
  96 #define VD
  97 #endif
  98
  99 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
 100 #define VS "s"
 101 #else
 102 #define VS
 103 #endif
 104
 105 #define IWLWIFI_VERSION "0.1.15k" VD VS
 106 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
 107 #define DRV_VERSION     IWLWIFI_VERSION
 108
 109 /* Change firmware file name, using "-" and incrementing number,
 110  *   *only* when uCode interface or architecture changes so that it
 111  *   is not compatible with earlier drivers.
 112  * This number will also appear in << 8 position of 1st dword of uCode file */
 113 #define IWL4965_UCODE_API "-1"
 114
 115 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 116 MODULE_VERSION(DRV_VERSION);
 117 MODULE_AUTHOR(DRV_COPYRIGHT);
 118 MODULE_LICENSE("GPL");
 119
 120 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 121 {
 122         u16 fc = le16_to_cpu(hdr->frame_control);
 123         int hdr_len = ieee80211_get_hdrlen(fc);
 124
 125         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 126                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 127         return NULL;
 128 }
 129
 130 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
 131                 struct iwl_priv *priv, int mode)
 132 {
 133         int i;
 134
 135         for (i = 0; i < 3; i++)
 136                 if (priv->modes[i].mode == mode)
 137                         return &priv->modes[i];
 138
 139         return NULL;
 140 }
 141
 142 static int iwl_is_empty_essid(const char *essid, int essid_len)
 143 {
 144         /* Single white space is for Linksys APs */
 145         if (essid_len == 1 && essid[0] == ' ')
 146                 return 1;
 147
 148         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 149         while (essid_len) {
 150                 essid_len--;
 151                 if (essid[essid_len] != '\0')
 152                         return 0;
 153         }
 154
 155         return 1;
 156 }
 157
 158 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
 159 {
 160         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 161         const char *s = essid;
 162         char *d = escaped;
 163
 164         if (iwl_is_empty_essid(essid, essid_len)) {
 165                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 166                 return escaped;
 167         }
 168
 169         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 170         while (essid_len--) {
 171                 if (*s == '\0') {
 172                         *d++ = '\\';
 173                         *d++ = '0';
 174                         s++;
 175                 } else
 176                         *d++ = *s++;
 177         }
 178         *d = '\0';
 179         return escaped;
 180 }
 181
 182 static void iwl_print_hex_dump(int level, void *p, u32 len)
 183 {
 184 #ifdef CONFIG_IWLWIFI_DEBUG
 185         if (!(iwl_debug_level & level))
 186                 return;
 187
 188         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 189                         p, len, 1);
 190 #endif
 191 }
 192
 193 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 194  * DMA services
 195  *
 196  * Theory of operation
 197  *
 198  * A queue is a circular buffers with 'Read' and 'Write' pointers.
 199  * 2 empty entries always kept in the buffer to protect from overflow.
 200  *
 201  * For Tx queue, there are low mark and high mark limits. If, after queuing
 202  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 203  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 204  * Tx queue resumed.
 205  *
 206  * The IPW operates with six queues, one receive queue in the device's
 207  * sram, one transmit queue for sending commands to the device firmware,
 208  * and four transmit queues for data.
 209  ***************************************************/
 210
 211 static int iwl_queue_space(const struct iwl_queue *q)
 212 {
 213         int s = q->last_used - q->first_empty;
 214
 215         if (q->last_used > q->first_empty)
 216                 s -= q->n_bd;
 217
 218         if (s <= 0)
 219                 s += q->n_window;
 220         /* keep some reserve to not confuse empty and full situations */
 221         s -= 2;
 222         if (s < 0)
 223                 s = 0;
 224         return s;
 225 }
 226
 227 /* XXX: n_bd must be power-of-two size */
 228 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 229 {
 230         return ++index & (n_bd - 1);
 231 }
 232
 233 /* XXX: n_bd must be power-of-two size */
 234 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 235 {
 236         return --index & (n_bd - 1);
 237 }
 238
 239 static inline int x2_queue_used(const struct iwl_queue *q, int i)
 240 {
 241         return q->first_empty > q->last_used ?
 242                 (i >= q->last_used && i < q->first_empty) :
 243                 !(i < q->last_used && i >= q->first_empty);
 244 }
 245
 246 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
 247 {
 248         if (is_huge)
 249                 return q->n_window;
 250
 251         return index & (q->n_window - 1);
 252 }
 253
 254 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
 255                           int count, int slots_num, u32 id)
 256 {
 257         q->n_bd = count;
 258         q->n_window = slots_num;
 259         q->id = id;
 260
 261         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 262          * and iwl_queue_dec_wrap are broken. */
 263         BUG_ON(!is_power_of_2(count));
 264
 265         /* slots_num must be power-of-two size, otherwise
 266          * get_cmd_index is broken. */
 267         BUG_ON(!is_power_of_2(slots_num));
 268
 269         q->low_mark = q->n_window / 4;
 270         if (q->low_mark < 4)
 271                 q->low_mark = 4;
 272
 273         q->high_mark = q->n_window / 8;
 274         if (q->high_mark < 2)
 275                 q->high_mark = 2;
 276
 277         q->first_empty = q->last_used = 0;
 278
 279         return 0;
 280 }
 281
 282 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
 283                               struct iwl_tx_queue *txq, u32 id)
 284 {
 285         struct pci_dev *dev = priv->pci_dev;
 286
 287         if (id != IWL_CMD_QUEUE_NUM) {
 288                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 289                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 290                 if (!txq->txb) {
 291                         IWL_ERROR("kmalloc for auxilary BD "
 292                                   "structures failed\n");
 293                         goto error;
 294                 }
 295         } else
 296                 txq->txb = NULL;
 297
 298         txq->bd = pci_alloc_consistent(dev,
 299                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 300                         &txq->q.dma_addr);
 301
 302         if (!txq->bd) {
 303                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 304                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 305                 goto error;
 306         }
 307         txq->q.id = id;
 308
 309         return 0;
 310
 311  error:
 312         if (txq->txb) {
 313                 kfree(txq->txb);
 314                 txq->txb = NULL;
 315         }
 316
 317         return -ENOMEM;
 318 }
 319
 320 int iwl_tx_queue_init(struct iwl_priv *priv,
 321                       struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
 322 {
 323         struct pci_dev *dev = priv->pci_dev;
 324         int len;
 325         int rc = 0;
 326
 327         /* alocate command space + one big command for scan since scan
 328          * command is very huge the system will not have two scan at the
 329          * same time */
 330         len = sizeof(struct iwl_cmd) * slots_num;
 331         if (txq_id == IWL_CMD_QUEUE_NUM)
 332                 len +=  IWL_MAX_SCAN_SIZE;
 333         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 334         if (!txq->cmd)
 335                 return -ENOMEM;
 336
 337         rc = iwl_tx_queue_alloc(priv, txq, txq_id);
 338         if (rc) {
 339                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 340
 341                 return -ENOMEM;
 342         }
 343         txq->need_update = 0;
 344
 345         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 346          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 347         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 348         iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 349
 350         iwl_hw_tx_queue_init(priv, txq);
 351
 352         return 0;
 353 }
 354
 355 /**
 356  * iwl_tx_queue_free - Deallocate DMA queue.
 357  * @txq: Transmit queue to deallocate.
 358  *
 359  * Empty queue by removing and destroying all BD's.
 360  * Free all buffers.  txq itself is not freed.
 361  *
 362  */
 363 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 364 {
 365         struct iwl_queue *q = &txq->q;
 366         struct pci_dev *dev = priv->pci_dev;
 367         int len;
 368
 369         if (q->n_bd == 0)
 370                 return;
 371
 372         /* first, empty all BD's */
 373         for (; q->first_empty != q->last_used;
 374              q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
 375                 iwl_hw_txq_free_tfd(priv, txq);
 376
 377         len = sizeof(struct iwl_cmd) * q->n_window;
 378         if (q->id == IWL_CMD_QUEUE_NUM)
 379                 len += IWL_MAX_SCAN_SIZE;
 380
 381         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 382
 383         /* free buffers belonging to queue itself */
 384         if (txq->q.n_bd)
 385                 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
 386                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 387
 388         if (txq->txb) {
 389                 kfree(txq->txb);
 390                 txq->txb = NULL;
 391         }
 392
 393         /* 0 fill whole structure */
 394         memset(txq, 0, sizeof(*txq));
 395 }
 396
 397 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 398
 399 /*************** STATION TABLE MANAGEMENT ****
 400  *
 401  * NOTE:  This needs to be overhauled to better synchronize between
 402  * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
 403  *
 404  * mac80211 should also be examined to determine if sta_info is duplicating
 405  * the functionality provided here
 406  */
 407
 408 /**************************************************************/
 409
 410 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 411 {
 412         int index = IWL_INVALID_STATION;
 413         int i;
 414         unsigned long flags;
 415
 416         spin_lock_irqsave(&priv->sta_lock, flags);
 417
 418         if (is_ap)
 419                 index = IWL_AP_ID;
 420         else if (is_broadcast_ether_addr(addr))
 421                 index = priv->hw_setting.bcast_sta_id;
 422         else
 423                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 424                         if (priv->stations[i].used &&
 425                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 426                                                 addr)) {
 427                                 index = i;
 428                                 break;
 429                         }
 430
 431         if (unlikely(index == IWL_INVALID_STATION))
 432                 goto out;
 433
 434         if (priv->stations[index].used) {
 435                 priv->stations[index].used = 0;
 436                 priv->num_stations--;
 437         }
 438
 439         BUG_ON(priv->num_stations < 0);
 440
 441 out:
 442         spin_unlock_irqrestore(&priv->sta_lock, flags);
 443         return 0;
 444 }
 445
 446 static void iwl_clear_stations_table(struct iwl_priv *priv)
 447 {
 448         unsigned long flags;
 449
 450         spin_lock_irqsave(&priv->sta_lock, flags);
 451
 452         priv->num_stations = 0;
 453         memset(priv->stations, 0, sizeof(priv->stations));
 454
 455         spin_unlock_irqrestore(&priv->sta_lock, flags);
 456 }
 457
 458 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
 459 {
 460         int i;
 461         int index = IWL_INVALID_STATION;
 462         struct iwl_station_entry *station;
 463         unsigned long flags_spin;
 464         DECLARE_MAC_BUF(mac);
 465
 466         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 467         if (is_ap)
 468                 index = IWL_AP_ID;
 469         else if (is_broadcast_ether_addr(addr))
 470                 index = priv->hw_setting.bcast_sta_id;
 471         else
 472                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 473                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 474                                                 addr)) {
 475                                 index = i;
 476                                 break;
 477                         }
 478
 479                         if (!priv->stations[i].used &&
 480                             index == IWL_INVALID_STATION)
 481                                 index = i;
 482                 }
 483
 484
 485         /* These twh conditions has the same outcome but keep them separate
 486           since they have different meaning */
 487         if (unlikely(index == IWL_INVALID_STATION)) {
 488                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 489                 return index;
 490         }
 491
 492         if (priv->stations[index].used &&
 493             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 494                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 495                 return index;
 496         }
 497
 498
 499         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 500         station = &priv->stations[index];
 501         station->used = 1;
 502         priv->num_stations++;
 503
 504         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 505         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 506         station->sta.mode = 0;
 507         station->sta.sta.sta_id = index;
 508         station->sta.station_flags = 0;
 509
 510 #ifdef CONFIG_IWLWIFI_HT
 511         /* BCAST station and IBSS stations do not work in HT mode */
 512         if (index != priv->hw_setting.bcast_sta_id &&
 513             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 514                 iwl4965_set_ht_add_station(priv, index);
 515 #endif /*CONFIG_IWLWIFI_HT*/
 516
 517         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 518         iwl_send_add_station(priv, &station->sta, flags);
 519         return index;
 520
 521 }
 522
 523 /*************** DRIVER STATUS FUNCTIONS   *****/
 524
 525 static inline int iwl_is_ready(struct iwl_priv *priv)
 526 {
 527         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 528          * set but EXIT_PENDING is not */
 529         return test_bit(STATUS_READY, &priv->status) &&
 530                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 531                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 532 }
 533
 534 static inline int iwl_is_alive(struct iwl_priv *priv)
 535 {
 536         return test_bit(STATUS_ALIVE, &priv->status);
 537 }
 538
 539 static inline int iwl_is_init(struct iwl_priv *priv)
 540 {
 541         return test_bit(STATUS_INIT, &priv->status);
 542 }
 543
 544 static inline int iwl_is_rfkill(struct iwl_priv *priv)
 545 {
 546         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 547                test_bit(STATUS_RF_KILL_SW, &priv->status);
 548 }
 549
 550 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
 551 {
 552
 553         if (iwl_is_rfkill(priv))
 554                 return 0;
 555
 556         return iwl_is_ready(priv);
 557 }
 558
 559 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 560
 561 #define IWL_CMD(x) case x : return #x
 562
 563 static const char *get_cmd_string(u8 cmd)
 564 {
 565         switch (cmd) {
 566                 IWL_CMD(REPLY_ALIVE);
 567                 IWL_CMD(REPLY_ERROR);
 568                 IWL_CMD(REPLY_RXON);
 569                 IWL_CMD(REPLY_RXON_ASSOC);
 570                 IWL_CMD(REPLY_QOS_PARAM);
 571                 IWL_CMD(REPLY_RXON_TIMING);
 572                 IWL_CMD(REPLY_ADD_STA);
 573                 IWL_CMD(REPLY_REMOVE_STA);
 574                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 575                 IWL_CMD(REPLY_TX);
 576                 IWL_CMD(REPLY_RATE_SCALE);
 577                 IWL_CMD(REPLY_LEDS_CMD);
 578                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 579                 IWL_CMD(RADAR_NOTIFICATION);
 580                 IWL_CMD(REPLY_QUIET_CMD);
 581                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 582                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 583                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 584                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 585                 IWL_CMD(POWER_TABLE_CMD);
 586                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 587                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 588                 IWL_CMD(REPLY_SCAN_CMD);
 589                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 590                 IWL_CMD(SCAN_START_NOTIFICATION);
 591                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 592                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 593                 IWL_CMD(BEACON_NOTIFICATION);
 594                 IWL_CMD(REPLY_TX_BEACON);
 595                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 596                 IWL_CMD(QUIET_NOTIFICATION);
 597                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 598                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 599                 IWL_CMD(REPLY_BT_CONFIG);
 600                 IWL_CMD(REPLY_STATISTICS_CMD);
 601                 IWL_CMD(STATISTICS_NOTIFICATION);
 602                 IWL_CMD(REPLY_CARD_STATE_CMD);
 603                 IWL_CMD(CARD_STATE_NOTIFICATION);
 604                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 605                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 606                 IWL_CMD(SENSITIVITY_CMD);
 607                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 608                 IWL_CMD(REPLY_RX_PHY_CMD);
 609                 IWL_CMD(REPLY_RX_MPDU_CMD);
 610                 IWL_CMD(REPLY_4965_RX);
 611                 IWL_CMD(REPLY_COMPRESSED_BA);
 612         default:
 613                 return "UNKNOWN";
 614
 615         }
 616 }
 617
 618 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 619
 620 /**
 621  * iwl_enqueue_hcmd - enqueue a uCode command
 622  * @priv: device private data point
 623  * @cmd: a point to the ucode command structure
 624  *
 625  * The function returns < 0 values to indicate the operation is
 626  * failed. On success, it turns the index (> 0) of command in the
 627  * command queue.
 628  */
 629 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 630 {
 631         struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 632         struct iwl_queue *q = &txq->q;
 633         struct iwl_tfd_frame *tfd;
 634         u32 *control_flags;
 635         struct iwl_cmd *out_cmd;
 636         u32 idx;
 637         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 638         dma_addr_t phys_addr;
 639         int ret;
 640         unsigned long flags;
 641
 642         /* If any of the command structures end up being larger than
 643          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 644          * we will need to increase the size of the TFD entries */
 645         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 646                !(cmd->meta.flags & CMD_SIZE_HUGE));
 647
 648         if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 649                 IWL_ERROR("No space for Tx\n");
 650                 return -ENOSPC;
 651         }
 652
 653         spin_lock_irqsave(&priv->hcmd_lock, flags);
 654
 655         tfd = &txq->bd[q->first_empty];
 656         memset(tfd, 0, sizeof(*tfd));
 657
 658         control_flags = (u32 *) tfd;
 659
 660         idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
 661         out_cmd = &txq->cmd[idx];
 662
 663         out_cmd->hdr.cmd = cmd->id;
 664         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 665         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 666
 667         /* At this point, the out_cmd now has all of the incoming cmd
 668          * information */
 669
 670         out_cmd->hdr.flags = 0;
 671         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 672                         INDEX_TO_SEQ(q->first_empty));
 673         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 674                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 675
 676         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 677                         offsetof(struct iwl_cmd, hdr);
 678         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 679
 680         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 681                      "%d bytes at %d[%d]:%d\n",
 682                      get_cmd_string(out_cmd->hdr.cmd),
 683                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 684                      fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
 685
 686         txq->need_update = 1;
 687         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 688         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
 689         iwl_tx_queue_update_write_ptr(priv, txq);
 690
 691         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 692         return ret ? ret : idx;
 693 }
 694
 695 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 696 {
 697         int ret;
 698
 699         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 700
 701         /* An asynchronous command can not expect an SKB to be set. */
 702         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 703
 704         /* An asynchronous command MUST have a callback. */
 705         BUG_ON(!cmd->meta.u.callback);
 706
 707         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 708                 return -EBUSY;
 709
 710         ret = iwl_enqueue_hcmd(priv, cmd);
 711         if (ret < 0) {
 712                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 713                           get_cmd_string(cmd->id), ret);
 714                 return ret;
 715         }
 716         return 0;
 717 }
 718
 719 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 720 {
 721         int cmd_idx;
 722         int ret;
 723         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 724
 725         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 726
 727          /* A synchronous command can not have a callback set. */
 728         BUG_ON(cmd->meta.u.callback != NULL);
 729
 730         if (atomic_xchg(&entry, 1)) {
 731                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 732                           get_cmd_string(cmd->id));
 733                 return -EBUSY;
 734         }
 735
 736         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 737
 738         if (cmd->meta.flags & CMD_WANT_SKB)
 739                 cmd->meta.source = &cmd->meta;
 740
 741         cmd_idx = iwl_enqueue_hcmd(priv, cmd);
 742         if (cmd_idx < 0) {
 743                 ret = cmd_idx;
 744                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 745                           get_cmd_string(cmd->id), ret);
 746                 goto out;
 747         }
 748
 749         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 750                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 751                         HOST_COMPLETE_TIMEOUT);
 752         if (!ret) {
 753                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 754                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 755                                   get_cmd_string(cmd->id),
 756                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 757
 758                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 759                         ret = -ETIMEDOUT;
 760                         goto cancel;
 761                 }
 762         }
 763
 764         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 765                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 766                                get_cmd_string(cmd->id));
 767                 ret = -ECANCELED;
 768                 goto fail;
 769         }
 770         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 771                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 772                                get_cmd_string(cmd->id));
 773                 ret = -EIO;
 774                 goto fail;
 775         }
 776         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 777                 IWL_ERROR("Error: Response NULL in '%s'\n",
 778                           get_cmd_string(cmd->id));
 779                 ret = -EIO;
 780                 goto out;
 781         }
 782
 783         ret = 0;
 784         goto out;
 785
 786 cancel:
 787         if (cmd->meta.flags & CMD_WANT_SKB) {
 788                 struct iwl_cmd *qcmd;
 789
 790                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 791                  * TX cmd queue. Otherwise in case the cmd comes
 792                  * in later, it will possibly set an invalid
 793                  * address (cmd->meta.source). */
 794                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 795                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 796         }
 797 fail:
 798         if (cmd->meta.u.skb) {
 799                 dev_kfree_skb_any(cmd->meta.u.skb);
 800                 cmd->meta.u.skb = NULL;
 801         }
 802 out:
 803         atomic_set(&entry, 0);
 804         return ret;
 805 }
 806
 807 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 808 {
 809         /* A command can not be asynchronous AND expect an SKB to be set. */
 810         BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
 811                (cmd->meta.flags & CMD_WANT_SKB));
 812
 813         if (cmd->meta.flags & CMD_ASYNC)
 814                 return iwl_send_cmd_async(priv, cmd);
 815
 816         return iwl_send_cmd_sync(priv, cmd);
 817 }
 818
 819 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
 820 {
 821         struct iwl_host_cmd cmd = {
 822                 .id = id,
 823                 .len = len,
 824                 .data = data,
 825         };
 826
 827         return iwl_send_cmd_sync(priv, &cmd);
 828 }
 829
 830 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
 831 {
 832         struct iwl_host_cmd cmd = {
 833                 .id = id,
 834                 .len = sizeof(val),
 835                 .data = &val,
 836         };
 837
 838         return iwl_send_cmd_sync(priv, &cmd);
 839 }
 840
 841 int iwl_send_statistics_request(struct iwl_priv *priv)
 842 {
 843         return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 844 }
 845
 846 /**
 847  * iwl_rxon_add_station - add station into station table.
 848  *
 849  * there is only one AP station with id= IWL_AP_ID
 850  * NOTE: mutex must be held before calling the this fnction
 851 */
 852 static int iwl_rxon_add_station(struct iwl_priv *priv,
 853                                 const u8 *addr, int is_ap)
 854 {
 855         u8 rc;
 856
 857         /* Remove this station if it happens to already exist */
 858         iwl_remove_station(priv, addr, is_ap);
 859
 860         rc = iwl_add_station(priv, addr, is_ap, 0);
 861
 862         iwl4965_add_station(priv, addr, is_ap);
 863
 864         return rc;
 865 }
 866
 867 /**
 868  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 869  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 870  * @channel: Any channel valid for the requested phymode
 871
 872  * In addition to setting the staging RXON, priv->phymode is also set.
 873  *
 874  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 875  * in the staging RXON flag structure based on the phymode
 876  */
 877 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
 878 {
 879         if (!iwl_get_channel_info(priv, phymode, channel)) {
 880                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 881                                channel, phymode);
 882                 return -EINVAL;
 883         }
 884
 885         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 886             (priv->phymode == phymode))
 887                 return 0;
 888
 889         priv->staging_rxon.channel = cpu_to_le16(channel);
 890         if (phymode == MODE_IEEE80211A)
 891                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 892         else
 893                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 894
 895         priv->phymode = phymode;
 896
 897         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 898
 899         return 0;
 900 }
 901
 902 /**
 903  * iwl_check_rxon_cmd - validate RXON structure is valid
 904  *
 905  * NOTE:  This is really only useful during development and can eventually
 906  * be #ifdef'd out once the driver is stable and folks aren't actively
 907  * making changes
 908  */
 909 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 910 {
 911         int error = 0;
 912         int counter = 1;
 913
 914         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 915                 error |= le32_to_cpu(rxon->flags &
 916                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 917                                  RXON_FLG_RADAR_DETECT_MSK));
 918                 if (error)
 919                         IWL_WARNING("check 24G fields %d | %d\n",
 920                                     counter++, error);
 921         } else {
 922                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 923                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 924                 if (error)
 925                         IWL_WARNING("check 52 fields %d | %d\n",
 926                                     counter++, error);
 927                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 928                 if (error)
 929                         IWL_WARNING("check 52 CCK %d | %d\n",
 930                                     counter++, error);
 931         }
 932         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 933         if (error)
 934                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 935
 936         /* make sure basic rates 6Mbps and 1Mbps are supported */
 937         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 938                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 939         if (error)
 940                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 941
 942         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 943         if (error)
 944                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 945
 946         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 947                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 948         if (error)
 949                 IWL_WARNING("check CCK and short slot %d | %d\n",
 950                             counter++, error);
 951
 952         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 953                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 954         if (error)
 955                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 956                             counter++, error);
 957
 958         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 959                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 960         if (error)
 961                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 962                             counter++, error);
 963
 964         if (error)
 965                 IWL_WARNING("Tuning to channel %d\n",
 966                             le16_to_cpu(rxon->channel));
 967
 968         if (error) {
 969                 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
 970                 return -1;
 971         }
 972         return 0;
 973 }
 974
 975 /**
 976  * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
 977  * @priv: staging_rxon is comapred to active_rxon
 978  *
 979  * If the RXON structure is changing sufficient to require a new
 980  * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
 981  * to indicate a new tune is required.
 982  */
 983 static int iwl_full_rxon_required(struct iwl_priv *priv)
 984 {
 985
 986         /* These items are only settable from the full RXON command */
 987         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 988             compare_ether_addr(priv->staging_rxon.bssid_addr,
 989                                priv->active_rxon.bssid_addr) ||
 990             compare_ether_addr(priv->staging_rxon.node_addr,
 991                                priv->active_rxon.node_addr) ||
 992             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 993                                priv->active_rxon.wlap_bssid_addr) ||
 994             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 995             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 996             (priv->staging_rxon.air_propagation !=
 997              priv->active_rxon.air_propagation) ||
 998             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 999              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
1000             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
1001              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
1002             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1003             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1004                 return 1;
1005
1006         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1007          * be updated with the RXON_ASSOC command -- however only some
1008          * flag transitions are allowed using RXON_ASSOC */
1009
1010         /* Check if we are not switching bands */
1011         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1012             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1013                 return 1;
1014
1015         /* Check if we are switching association toggle */
1016         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1017                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1018                 return 1;
1019
1020         return 0;
1021 }
1022
1023 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1024 {
1025         int rc = 0;
1026         struct iwl_rx_packet *res = NULL;
1027         struct iwl_rxon_assoc_cmd rxon_assoc;
1028         struct iwl_host_cmd cmd = {
1029                 .id = REPLY_RXON_ASSOC,
1030                 .len = sizeof(rxon_assoc),
1031                 .meta.flags = CMD_WANT_SKB,
1032                 .data = &rxon_assoc,
1033         };
1034         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1035         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1036
1037         if ((rxon1->flags == rxon2->flags) &&
1038             (rxon1->filter_flags == rxon2->filter_flags) &&
1039             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1040             (rxon1->ofdm_ht_single_stream_basic_rates ==
1041              rxon2->ofdm_ht_single_stream_basic_rates) &&
1042             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1043              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1044             (rxon1->rx_chain == rxon2->rx_chain) &&
1045             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1046                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1047                 return 0;
1048         }
1049
1050         rxon_assoc.flags = priv->staging_rxon.flags;
1051         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1052         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1053         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1054         rxon_assoc.reserved = 0;
1055         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1056             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1057         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1058             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1059         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1060
1061         rc = iwl_send_cmd_sync(priv, &cmd);
1062         if (rc)
1063                 return rc;
1064
1065         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1066         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1067                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1068                 rc = -EIO;
1069         }
1070
1071         priv->alloc_rxb_skb--;
1072         dev_kfree_skb_any(cmd.meta.u.skb);
1073
1074         return rc;
1075 }
1076
1077 /**
1078  * iwl_commit_rxon - commit staging_rxon to hardware
1079  *
1080  * The RXON command in staging_rxon is commited to the hardware and
1081  * the active_rxon structure is updated with the new data.  This
1082  * function correctly transitions out of the RXON_ASSOC_MSK state if
1083  * a HW tune is required based on the RXON structure changes.
1084  */
1085 static int iwl_commit_rxon(struct iwl_priv *priv)
1086 {
1087         /* cast away the const for active_rxon in this function */
1088         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1089         DECLARE_MAC_BUF(mac);
1090         int rc = 0;
1091
1092         if (!iwl_is_alive(priv))
1093                 return -1;
1094
1095         /* always get timestamp with Rx frame */
1096         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1097
1098         rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1099         if (rc) {
1100                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1101                 return -EINVAL;
1102         }
1103
1104         /* If we don't need to send a full RXON, we can use
1105          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1106          * and other flags for the current radio configuration. */
1107         if (!iwl_full_rxon_required(priv)) {
1108                 rc = iwl_send_rxon_assoc(priv);
1109                 if (rc) {
1110                         IWL_ERROR("Error setting RXON_ASSOC "
1111                                   "configuration (%d).\n", rc);
1112                         return rc;
1113                 }
1114
1115                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1116
1117                 return 0;
1118         }
1119
1120         /* station table will be cleared */
1121         priv->assoc_station_added = 0;
1122
1123 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1124         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1125         if (!priv->error_recovering)
1126                 priv->start_calib = 0;
1127
1128         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1129 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1130
1131         /* If we are currently associated and the new config requires
1132          * an RXON_ASSOC and the new config wants the associated mask enabled,
1133          * we must clear the associated from the active configuration
1134          * before we apply the new config */
1135         if (iwl_is_associated(priv) &&
1136             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1137                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1138                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1139
1140                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1141                                       sizeof(struct iwl_rxon_cmd),
1142                                       &priv->active_rxon);
1143
1144                 /* If the mask clearing failed then we set
1145                  * active_rxon back to what it was previously */
1146                 if (rc) {
1147                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1148                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1149                                   "configuration (%d).\n", rc);
1150                         return rc;
1151                 }
1152
1153                 /* The RXON bit toggling will have cleared out the
1154                  * station table in the uCode, so blank it in the driver
1155                  * as well */
1156                 iwl_clear_stations_table(priv);
1157         } else if (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) {
1158                 /* When switching from non-associated to associated, the
1159                  * uCode clears out the station table; so clear it in the
1160                  * driver as well */
1161                 iwl_clear_stations_table(priv);
1162         }
1163
1164         IWL_DEBUG_INFO("Sending RXON\n"
1165                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1166                        "* channel = %d\n"
1167                        "* bssid = %s\n",
1168                        ((priv->staging_rxon.filter_flags &
1169                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1170                        le16_to_cpu(priv->staging_rxon.channel),
1171                        print_mac(mac, priv->staging_rxon.bssid_addr));
1172
1173         /* Apply the new configuration */
1174         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1175                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1176         if (rc) {
1177                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1178                 return rc;
1179         }
1180
1181 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1182         if (!priv->error_recovering)
1183                 priv->start_calib = 0;
1184
1185         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1186         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1187 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1188
1189         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1190
1191         /* If we issue a new RXON command which required a tune then we must
1192          * send a new TXPOWER command or we won't be able to Tx any frames */
1193         rc = iwl_hw_reg_send_txpower(priv);
1194         if (rc) {
1195                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1196                 return rc;
1197         }
1198
1199         /* Add the broadcast address so we can send broadcast frames */
1200         if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1201             IWL_INVALID_STATION) {
1202                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1203                 return -EIO;
1204         }
1205
1206         /* If we have set the ASSOC_MSK and we are in BSS mode then
1207          * add the IWL_AP_ID to the station rate table */
1208         if (iwl_is_associated(priv) &&
1209             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1210                 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1211                     == IWL_INVALID_STATION) {
1212                         IWL_ERROR("Error adding AP address for transmit.\n");
1213                         return -EIO;
1214                 }
1215                 priv->assoc_station_added = 1;
1216         }
1217
1218         return 0;
1219 }
1220
1221 static int iwl_send_bt_config(struct iwl_priv *priv)
1222 {
1223         struct iwl_bt_cmd bt_cmd = {
1224                 .flags = 3,
1225                 .lead_time = 0xAA,
1226                 .max_kill = 1,
1227                 .kill_ack_mask = 0,
1228                 .kill_cts_mask = 0,
1229         };
1230
1231         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1232                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1233 }
1234
1235 static int iwl_send_scan_abort(struct iwl_priv *priv)
1236 {
1237         int rc = 0;
1238         struct iwl_rx_packet *res;
1239         struct iwl_host_cmd cmd = {
1240                 .id = REPLY_SCAN_ABORT_CMD,
1241                 .meta.flags = CMD_WANT_SKB,
1242         };
1243
1244         /* If there isn't a scan actively going on in the hardware
1245          * then we are in between scan bands and not actually
1246          * actively scanning, so don't send the abort command */
1247         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1248                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1249                 return 0;
1250         }
1251
1252         rc = iwl_send_cmd_sync(priv, &cmd);
1253         if (rc) {
1254                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1255                 return rc;
1256         }
1257
1258         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1259         if (res->u.status != CAN_ABORT_STATUS) {
1260                 /* The scan abort will return 1 for success or
1261                  * 2 for "failure".  A failure condition can be
1262                  * due to simply not being in an active scan which
1263                  * can occur if we send the scan abort before we
1264                  * the microcode has notified us that a scan is
1265                  * completed. */
1266                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1267                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1268                 clear_bit(STATUS_SCAN_HW, &priv->status);
1269         }
1270
1271         dev_kfree_skb_any(cmd.meta.u.skb);
1272
1273         return rc;
1274 }
1275
1276 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1277                                         struct iwl_cmd *cmd,
1278                                         struct sk_buff *skb)
1279 {
1280         return 1;
1281 }
1282
1283 /*
1284  * CARD_STATE_CMD
1285  *
1286  * Use: Sets the internal card state to enable, disable, or halt
1287  *
1288  * When in the 'enable' state the card operates as normal.
1289  * When in the 'disable' state, the card enters into a low power mode.
1290  * When in the 'halt' state, the card is shut down and must be fully
1291  * restarted to come back on.
1292  */
1293 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1294 {
1295         struct iwl_host_cmd cmd = {
1296                 .id = REPLY_CARD_STATE_CMD,
1297                 .len = sizeof(u32),
1298                 .data = &flags,
1299                 .meta.flags = meta_flag,
1300         };
1301
1302         if (meta_flag & CMD_ASYNC)
1303                 cmd.meta.u.callback = iwl_card_state_sync_callback;
1304
1305         return iwl_send_cmd(priv, &cmd);
1306 }
1307
1308 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1309                                      struct iwl_cmd *cmd, struct sk_buff *skb)
1310 {
1311         struct iwl_rx_packet *res = NULL;
1312
1313         if (!skb) {
1314                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1315                 return 1;
1316         }
1317
1318         res = (struct iwl_rx_packet *)skb->data;
1319         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1320                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1321                           res->hdr.flags);
1322                 return 1;
1323         }
1324
1325         switch (res->u.add_sta.status) {
1326         case ADD_STA_SUCCESS_MSK:
1327                 break;
1328         default:
1329                 break;
1330         }
1331
1332         /* We didn't cache the SKB; let the caller free it */
1333         return 1;
1334 }
1335
1336 int iwl_send_add_station(struct iwl_priv *priv,
1337                          struct iwl_addsta_cmd *sta, u8 flags)
1338 {
1339         struct iwl_rx_packet *res = NULL;
1340         int rc = 0;
1341         struct iwl_host_cmd cmd = {
1342                 .id = REPLY_ADD_STA,
1343                 .len = sizeof(struct iwl_addsta_cmd),
1344                 .meta.flags = flags,
1345                 .data = sta,
1346         };
1347
1348         if (flags & CMD_ASYNC)
1349                 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1350         else
1351                 cmd.meta.flags |= CMD_WANT_SKB;
1352
1353         rc = iwl_send_cmd(priv, &cmd);
1354
1355         if (rc || (flags & CMD_ASYNC))
1356                 return rc;
1357
1358         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1359         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1360                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1361                           res->hdr.flags);
1362                 rc = -EIO;
1363         }
1364
1365         if (rc == 0) {
1366                 switch (res->u.add_sta.status) {
1367                 case ADD_STA_SUCCESS_MSK:
1368                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1369                         break;
1370                 default:
1371                         rc = -EIO;
1372                         IWL_WARNING("REPLY_ADD_STA failed\n");
1373                         break;
1374                 }
1375         }
1376
1377         priv->alloc_rxb_skb--;
1378         dev_kfree_skb_any(cmd.meta.u.skb);
1379
1380         return rc;
1381 }
1382
1383 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1384                                    struct ieee80211_key_conf *keyconf,
1385                                    u8 sta_id)
1386 {
1387         unsigned long flags;
1388         __le16 key_flags = 0;
1389
1390         switch (keyconf->alg) {
1391         case ALG_CCMP:
1392                 key_flags |= STA_KEY_FLG_CCMP;
1393                 key_flags |= cpu_to_le16(
1394                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1395                 key_flags &= ~STA_KEY_FLG_INVALID;
1396                 break;
1397         case ALG_TKIP:
1398         case ALG_WEP:
1399                 return -EINVAL;
1400         default:
1401                 return -EINVAL;
1402         }
1403         spin_lock_irqsave(&priv->sta_lock, flags);
1404         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1405         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1406         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1407                keyconf->keylen);
1408
1409         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1410                keyconf->keylen);
1411         priv->stations[sta_id].sta.key.key_flags = key_flags;
1412         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1413         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1414
1415         spin_unlock_irqrestore(&priv->sta_lock, flags);
1416
1417         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1418         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1419         return 0;
1420 }
1421
1422 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1423 {
1424         unsigned long flags;
1425
1426         spin_lock_irqsave(&priv->sta_lock, flags);
1427         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1428         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1429         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1430         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1431         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1432         spin_unlock_irqrestore(&priv->sta_lock, flags);
1433
1434         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1435         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1436         return 0;
1437 }
1438
1439 static void iwl_clear_free_frames(struct iwl_priv *priv)
1440 {
1441         struct list_head *element;
1442
1443         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1444                        priv->frames_count);
1445
1446         while (!list_empty(&priv->free_frames)) {
1447                 element = priv->free_frames.next;
1448                 list_del(element);
1449                 kfree(list_entry(element, struct iwl_frame, list));
1450                 priv->frames_count--;
1451         }
1452
1453         if (priv->frames_count) {
1454                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1455                             priv->frames_count);
1456                 priv->frames_count = 0;
1457         }
1458 }
1459
1460 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1461 {
1462         struct iwl_frame *frame;
1463         struct list_head *element;
1464         if (list_empty(&priv->free_frames)) {
1465                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1466                 if (!frame) {
1467                         IWL_ERROR("Could not allocate frame!\n");
1468                         return NULL;
1469                 }
1470
1471                 priv->frames_count++;
1472                 return frame;
1473         }
1474
1475         element = priv->free_frames.next;
1476         list_del(element);
1477         return list_entry(element, struct iwl_frame, list);
1478 }
1479
1480 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1481 {
1482         memset(frame, 0, sizeof(*frame));
1483         list_add(&frame->list, &priv->free_frames);
1484 }
1485
1486 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1487                                 struct ieee80211_hdr *hdr,
1488                                 const u8 *dest, int left)
1489 {
1490
1491         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1492             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1493              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1494                 return 0;
1495
1496         if (priv->ibss_beacon->len > left)
1497                 return 0;
1498
1499         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1500
1501         return priv->ibss_beacon->len;
1502 }
1503
1504 int iwl_rate_index_from_plcp(int plcp)
1505 {
1506         int i = 0;
1507
1508         if (plcp & RATE_MCS_HT_MSK) {
1509                 i = (plcp & 0xff);
1510
1511                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1512                         i = i - IWL_RATE_MIMO_6M_PLCP;
1513
1514                 i += IWL_FIRST_OFDM_RATE;
1515                 /* skip 9M not supported in ht*/
1516                 if (i >= IWL_RATE_9M_INDEX)
1517                         i += 1;
1518                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1519                     (i <= IWL_LAST_OFDM_RATE))
1520                         return i;
1521         } else {
1522                 for (i = 0; i < ARRAY_SIZE(iwl_rates); i++)
1523                         if (iwl_rates[i].plcp == (plcp &0xFF))
1524                                 return i;
1525         }
1526         return -1;
1527 }
1528
1529 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1530 {
1531         u8 i;
1532
1533         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1534              i = iwl_rates[i].next_ieee) {
1535                 if (rate_mask & (1 << i))
1536                         return iwl_rates[i].plcp;
1537         }
1538
1539         return IWL_RATE_INVALID;
1540 }
1541
1542 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1543 {
1544         struct iwl_frame *frame;
1545         unsigned int frame_size;
1546         int rc;
1547         u8 rate;
1548
1549         frame = iwl_get_free_frame(priv);
1550
1551         if (!frame) {
1552                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1553                           "command.\n");
1554                 return -ENOMEM;
1555         }
1556
1557         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1558                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1559                                                 0xFF0);
1560                 if (rate == IWL_INVALID_RATE)
1561                         rate = IWL_RATE_6M_PLCP;
1562         } else {
1563                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1564                 if (rate == IWL_INVALID_RATE)
1565                         rate = IWL_RATE_1M_PLCP;
1566         }
1567
1568         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1569
1570         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1571                               &frame->u.cmd[0]);
1572
1573         iwl_free_frame(priv, frame);
1574
1575         return rc;
1576 }
1577
1578 /******************************************************************************
1579  *
1580  * EEPROM related functions
1581  *
1582  ******************************************************************************/
1583
1584 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1585 {
1586         memcpy(mac, priv->eeprom.mac_address, 6);
1587 }
1588
1589 /**
1590  * iwl_eeprom_init - read EEPROM contents
1591  *
1592  * Load the EEPROM from adapter into priv->eeprom
1593  *
1594  * NOTE:  This routine uses the non-debug IO access functions.
1595  */
1596 int iwl_eeprom_init(struct iwl_priv *priv)
1597 {
1598         u16 *e = (u16 *)&priv->eeprom;
1599         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1600         u32 r;
1601         int sz = sizeof(priv->eeprom);
1602         int rc;
1603         int i;
1604         u16 addr;
1605
1606         /* The EEPROM structure has several padding buffers within it
1607          * and when adding new EEPROM maps is subject to programmer errors
1608          * which may be very difficult to identify without explicitly
1609          * checking the resulting size of the eeprom map. */
1610         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1611
1612         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1613                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1614                 return -ENOENT;
1615         }
1616
1617         rc = iwl_eeprom_aqcuire_semaphore(priv);
1618         if (rc < 0) {
1619                 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1620                 return -ENOENT;
1621         }
1622
1623         /* eeprom is an array of 16bit values */
1624         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1625                 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1626                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1627
1628                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1629                                         i += IWL_EEPROM_ACCESS_DELAY) {
1630                         r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1631                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1632                                 break;
1633                         udelay(IWL_EEPROM_ACCESS_DELAY);
1634                 }
1635
1636                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1637                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1638                         rc = -ETIMEDOUT;
1639                         goto done;
1640                 }
1641                 e[addr / 2] = le16_to_cpu(r >> 16);
1642         }
1643         rc = 0;
1644
1645 done:
1646         iwl_eeprom_release_semaphore(priv);
1647         return rc;
1648 }
1649
1650 /******************************************************************************
1651  *
1652  * Misc. internal state and helper functions
1653  *
1654  ******************************************************************************/
1655 #ifdef CONFIG_IWLWIFI_DEBUG
1656
1657 /**
1658  * iwl_report_frame - dump frame to syslog during debug sessions
1659  *
1660  * hack this function to show different aspects of received frames,
1661  * including selective frame dumps.
1662  * group100 parameter selects whether to show 1 out of 100 good frames.
1663  *
1664  * TODO:  ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1665  *        info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1666  *        is 3945-specific and gives bad output for 4965.  Need to split the
1667  *        functionality, keep common stuff here.
1668  */
1669 void iwl_report_frame(struct iwl_priv *priv,
1670                       struct iwl_rx_packet *pkt,
1671                       struct ieee80211_hdr *header, int group100)
1672 {
1673         u32 to_us;
1674         u32 print_summary = 0;
1675         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1676         u32 hundred = 0;
1677         u32 dataframe = 0;
1678         u16 fc;
1679         u16 seq_ctl;
1680         u16 channel;
1681         u16 phy_flags;
1682         int rate_sym;
1683         u16 length;
1684         u16 status;
1685         u16 bcn_tmr;
1686         u32 tsf_low;
1687         u64 tsf;
1688         u8 rssi;
1689         u8 agc;
1690         u16 sig_avg;
1691         u16 noise_diff;
1692         struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1693         struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1694         struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1695         u8 *data = IWL_RX_DATA(pkt);
1696
1697         /* MAC header */
1698         fc = le16_to_cpu(header->frame_control);
1699         seq_ctl = le16_to_cpu(header->seq_ctrl);
1700
1701         /* metadata */
1702         channel = le16_to_cpu(rx_hdr->channel);
1703         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1704         rate_sym = rx_hdr->rate;
1705         length = le16_to_cpu(rx_hdr->len);
1706
1707         /* end-of-frame status and timestamp */
1708         status = le32_to_cpu(rx_end->status);
1709         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1710         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1711         tsf = le64_to_cpu(rx_end->timestamp);
1712
1713         /* signal statistics */
1714         rssi = rx_stats->rssi;
1715         agc = rx_stats->agc;
1716         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1717         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1718
1719         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1720
1721         /* if data frame is to us and all is good,
1722          *   (optionally) print summary for only 1 out of every 100 */
1723         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1724             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1725                 dataframe = 1;
1726                 if (!group100)
1727                         print_summary = 1;      /* print each frame */
1728                 else if (priv->framecnt_to_us < 100) {
1729                         priv->framecnt_to_us++;
1730                         print_summary = 0;
1731                 } else {
1732                         priv->framecnt_to_us = 0;
1733                         print_summary = 1;
1734                         hundred = 1;
1735                 }
1736         } else {
1737                 /* print summary for all other frames */
1738                 print_summary = 1;
1739         }
1740
1741         if (print_summary) {
1742                 char *title;
1743                 u32 rate;
1744
1745                 if (hundred)
1746                         title = "100Frames";
1747                 else if (fc & IEEE80211_FCTL_RETRY)
1748                         title = "Retry";
1749                 else if (ieee80211_is_assoc_response(fc))
1750                         title = "AscRsp";
1751                 else if (ieee80211_is_reassoc_response(fc))
1752                         title = "RasRsp";
1753                 else if (ieee80211_is_probe_response(fc)) {
1754                         title = "PrbRsp";
1755                         print_dump = 1; /* dump frame contents */
1756                 } else if (ieee80211_is_beacon(fc)) {
1757                         title = "Beacon";
1758                         print_dump = 1; /* dump frame contents */
1759                 } else if (ieee80211_is_atim(fc))
1760                         title = "ATIM";
1761                 else if (ieee80211_is_auth(fc))
1762                         title = "Auth";
1763                 else if (ieee80211_is_deauth(fc))
1764                         title = "DeAuth";
1765                 else if (ieee80211_is_disassoc(fc))
1766                         title = "DisAssoc";
1767                 else
1768                         title = "Frame";
1769
1770                 rate = iwl_rate_index_from_plcp(rate_sym);
1771                 if (rate == -1)
1772                         rate = 0;
1773                 else
1774                         rate = iwl_rates[rate].ieee / 2;
1775
1776                 /* print frame summary.
1777                  * MAC addresses show just the last byte (for brevity),
1778                  *    but you can hack it to show more, if you'd like to. */
1779                 if (dataframe)
1780                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1781                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1782                                      title, fc, header->addr1[5],
1783                                      length, rssi, channel, rate);
1784                 else {
1785                         /* src/dst addresses assume managed mode */
1786                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1787                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1788                                      "phy=0x%02x, chnl=%d\n",
1789                                      title, fc, header->addr1[5],
1790                                      header->addr3[5], rssi,
1791                                      tsf_low - priv->scan_start_tsf,
1792                                      phy_flags, channel);
1793                 }
1794         }
1795         if (print_dump)
1796                 iwl_print_hex_dump(IWL_DL_RX, data, length);
1797 }
1798 #endif
1799
1800 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1801 {
1802         if (priv->hw_setting.shared_virt)
1803                 pci_free_consistent(priv->pci_dev,
1804                                     sizeof(struct iwl_shared),
1805                                     priv->hw_setting.shared_virt,
1806                                     priv->hw_setting.shared_phys);
1807 }
1808
1809 /**
1810  * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1811  *
1812  * return : set the bit for each supported rate insert in ie
1813  */
1814 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1815                                     u16 basic_rate, int max_count)
1816 {
1817         u16 ret_rates = 0, bit;
1818         int i;
1819         u8 *rates;
1820
1821         rates = &(ie[1]);
1822
1823         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1824                 if (bit & supported_rate) {
1825                         ret_rates |= bit;
1826                         rates[*ie] = iwl_rates[i].ieee |
1827                             ((bit & basic_rate) ? 0x80 : 0x00);
1828                         *ie = *ie + 1;
1829                         if (*ie >= max_count)
1830                                 break;
1831                 }
1832         }
1833
1834         return ret_rates;
1835 }
1836
1837 #ifdef CONFIG_IWLWIFI_HT
1838 void static iwl_set_ht_capab(struct ieee80211_hw *hw,
1839                              struct ieee80211_ht_capability *ht_cap,
1840                              u8 use_wide_chan);
1841 #endif
1842
1843 /**
1844  * iwl_fill_probe_req - fill in all required fields and IE for probe request
1845  */
1846 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1847                               struct ieee80211_mgmt *frame,
1848                               int left, int is_direct)
1849 {
1850         int len = 0;
1851         u8 *pos = NULL;
1852         u16 ret_rates;
1853
1854         /* Make sure there is enough space for the probe request,
1855          * two mandatory IEs and the data */
1856         left -= 24;
1857         if (left < 0)
1858                 return 0;
1859         len += 24;
1860
1861         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1862         memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1863         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1864         memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1865         frame->seq_ctrl = 0;
1866
1867         /* fill in our indirect SSID IE */
1868         /* ...next IE... */
1869
1870         left -= 2;
1871         if (left < 0)
1872                 return 0;
1873         len += 2;
1874         pos = &(frame->u.probe_req.variable[0]);
1875         *pos++ = WLAN_EID_SSID;
1876         *pos++ = 0;
1877
1878         /* fill in our direct SSID IE... */
1879         if (is_direct) {
1880                 /* ...next IE... */
1881                 left -= 2 + priv->essid_len;
1882                 if (left < 0)
1883                         return 0;
1884                 /* ... fill it in... */
1885                 *pos++ = WLAN_EID_SSID;
1886                 *pos++ = priv->essid_len;
1887                 memcpy(pos, priv->essid, priv->essid_len);
1888                 pos += priv->essid_len;
1889                 len += 2 + priv->essid_len;
1890         }
1891
1892         /* fill in supported rate */
1893         /* ...next IE... */
1894         left -= 2;
1895         if (left < 0)
1896                 return 0;
1897         /* ... fill it in... */
1898         *pos++ = WLAN_EID_SUPP_RATES;
1899         *pos = 0;
1900         ret_rates = priv->active_rate = priv->rates_mask;
1901         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1902
1903         iwl_supported_rate_to_ie(pos, priv->active_rate,
1904                                  priv->active_rate_basic, left);
1905         len += 2 + *pos;
1906         pos += (*pos) + 1;
1907         ret_rates = ~ret_rates & priv->active_rate;
1908
1909         if (ret_rates == 0)
1910                 goto fill_end;
1911
1912         /* fill in supported extended rate */
1913         /* ...next IE... */
1914         left -= 2;
1915         if (left < 0)
1916                 return 0;
1917         /* ... fill it in... */
1918         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1919         *pos = 0;
1920         iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left);
1921         if (*pos > 0)
1922                 len += 2 + *pos;
1923
1924 #ifdef CONFIG_IWLWIFI_HT
1925         if (is_direct && priv->is_ht_enabled) {
1926                 u8 use_wide_chan = 1;
1927
1928                 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
1929                         use_wide_chan = 0;
1930                 pos += (*pos) + 1;
1931                 *pos++ = WLAN_EID_HT_CAPABILITY;
1932                 *pos++ = sizeof(struct ieee80211_ht_capability);
1933                 iwl_set_ht_capab(NULL, (struct ieee80211_ht_capability *)pos,
1934                                  use_wide_chan);
1935                 len += 2 + sizeof(struct ieee80211_ht_capability);
1936         }
1937 #endif  /*CONFIG_IWLWIFI_HT */
1938
1939  fill_end:
1940         return (u16)len;
1941 }
1942
1943 /*
1944  * QoS  support
1945 */
1946 #ifdef CONFIG_IWLWIFI_QOS
1947 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1948                                        struct iwl_qosparam_cmd *qos)
1949 {
1950
1951         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1952                                 sizeof(struct iwl_qosparam_cmd), qos);
1953 }
1954
1955 static void iwl_reset_qos(struct iwl_priv *priv)
1956 {
1957         u16 cw_min = 15;
1958         u16 cw_max = 1023;
1959         u8 aifs = 2;
1960         u8 is_legacy = 0;
1961         unsigned long flags;
1962         int i;
1963
1964         spin_lock_irqsave(&priv->lock, flags);
1965         priv->qos_data.qos_active = 0;
1966
1967         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1968                 if (priv->qos_data.qos_enable)
1969                         priv->qos_data.qos_active = 1;
1970                 if (!(priv->active_rate & 0xfff0)) {
1971                         cw_min = 31;
1972                         is_legacy = 1;
1973                 }
1974         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1975                 if (priv->qos_data.qos_enable)
1976                         priv->qos_data.qos_active = 1;
1977         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1978                 cw_min = 31;
1979                 is_legacy = 1;
1980         }
1981
1982         if (priv->qos_data.qos_active)
1983                 aifs = 3;
1984
1985         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1986         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1987         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1988         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1989         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1990
1991         if (priv->qos_data.qos_active) {
1992                 i = 1;
1993                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1994                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1995                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1996                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1997                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1998
1999                 i = 2;
2000                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2001                         cpu_to_le16((cw_min + 1) / 2 - 1);
2002                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2003                         cpu_to_le16(cw_max);
2004                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2005                 if (is_legacy)
2006                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2007                                 cpu_to_le16(6016);
2008                 else
2009                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2010                                 cpu_to_le16(3008);
2011                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2012
2013                 i = 3;
2014                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2015                         cpu_to_le16((cw_min + 1) / 4 - 1);
2016                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2017                         cpu_to_le16((cw_max + 1) / 2 - 1);
2018                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2019                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2020                 if (is_legacy)
2021                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2022                                 cpu_to_le16(3264);
2023                 else
2024                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2025                                 cpu_to_le16(1504);
2026         } else {
2027                 for (i = 1; i < 4; i++) {
2028                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2029                                 cpu_to_le16(cw_min);
2030                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2031                                 cpu_to_le16(cw_max);
2032                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2033                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2034                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2035                 }
2036         }
2037         IWL_DEBUG_QOS("set QoS to default \n");
2038
2039         spin_unlock_irqrestore(&priv->lock, flags);
2040 }
2041
2042 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
2043 {
2044         unsigned long flags;
2045
2046         if (priv == NULL)
2047                 return;
2048
2049         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2050                 return;
2051
2052         if (!priv->qos_data.qos_enable)
2053                 return;
2054
2055         spin_lock_irqsave(&priv->lock, flags);
2056         priv->qos_data.def_qos_parm.qos_flags = 0;
2057
2058         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2059             !priv->qos_data.qos_cap.q_AP.txop_request)
2060                 priv->qos_data.def_qos_parm.qos_flags |=
2061                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2062
2063         if (priv->qos_data.qos_active)
2064                 priv->qos_data.def_qos_parm.qos_flags |=
2065                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2066
2067         spin_unlock_irqrestore(&priv->lock, flags);
2068
2069         if (force || iwl_is_associated(priv)) {
2070                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2071                               priv->qos_data.qos_active);
2072
2073                 iwl_send_qos_params_command(priv,
2074                                 &(priv->qos_data.def_qos_parm));
2075         }
2076 }
2077
2078 #endif /* CONFIG_IWLWIFI_QOS */
2079 /*
2080  * Power management (not Tx power!) functions
2081  */
2082 #define MSEC_TO_USEC 1024
2083
2084 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2085 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2086 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2087 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2088                                      __constant_cpu_to_le32(X1), \
2089                                      __constant_cpu_to_le32(X2), \
2090                                      __constant_cpu_to_le32(X3), \
2091                                      __constant_cpu_to_le32(X4)}
2092
2093
2094 /* default power management (not Tx power) table values */
2095 /* for tim  0-10 */
2096 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2097         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2098         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2099         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2100         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2101         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2102         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2103 };
2104
2105 /* for tim > 10 */
2106 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2107         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2108         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2109                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2110         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2111                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2112         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2113                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2114         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2115         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2116                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2117 };
2118
2119 int iwl_power_init_handle(struct iwl_priv *priv)
2120 {
2121         int rc = 0, i;
2122         struct iwl_power_mgr *pow_data;
2123         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2124         u16 pci_pm;
2125
2126         IWL_DEBUG_POWER("Initialize power \n");
2127
2128         pow_data = &(priv->power_data);
2129
2130         memset(pow_data, 0, sizeof(*pow_data));
2131
2132         pow_data->active_index = IWL_POWER_RANGE_0;
2133         pow_data->dtim_val = 0xffff;
2134
2135         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2136         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2137
2138         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2139         if (rc != 0)
2140                 return 0;
2141         else {
2142                 struct iwl_powertable_cmd *cmd;
2143
2144                 IWL_DEBUG_POWER("adjust power command flags\n");
2145
2146                 for (i = 0; i < IWL_POWER_AC; i++) {
2147                         cmd = &pow_data->pwr_range_0[i].cmd;
2148
2149                         if (pci_pm & 0x1)
2150                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2151                         else
2152                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2153                 }
2154         }
2155         return rc;
2156 }
2157
2158 static int iwl_update_power_cmd(struct iwl_priv *priv,
2159                                 struct iwl_powertable_cmd *cmd, u32 mode)
2160 {
2161         int rc = 0, i;
2162         u8 skip;
2163         u32 max_sleep = 0;
2164         struct iwl_power_vec_entry *range;
2165         u8 period = 0;
2166         struct iwl_power_mgr *pow_data;
2167
2168         if (mode > IWL_POWER_INDEX_5) {
2169                 IWL_DEBUG_POWER("Error invalid power mode \n");
2170                 return -1;
2171         }
2172         pow_data = &(priv->power_data);
2173
2174         if (pow_data->active_index == IWL_POWER_RANGE_0)
2175                 range = &pow_data->pwr_range_0[0];
2176         else
2177                 range = &pow_data->pwr_range_1[1];
2178
2179         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2180
2181 #ifdef IWL_MAC80211_DISABLE
2182         if (priv->assoc_network != NULL) {
2183                 unsigned long flags;
2184
2185                 period = priv->assoc_network->tim.tim_period;
2186         }
2187 #endif  /*IWL_MAC80211_DISABLE */
2188         skip = range[mode].no_dtim;
2189
2190         if (period == 0) {
2191                 period = 1;
2192                 skip = 0;
2193         }
2194
2195         if (skip == 0) {
2196                 max_sleep = period;
2197                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2198         } else {
2199                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2200                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2201                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2202         }
2203
2204         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2205                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2206                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2207         }
2208
2209         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2210         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2211         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2212         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2213                         le32_to_cpu(cmd->sleep_interval[0]),
2214                         le32_to_cpu(cmd->sleep_interval[1]),
2215                         le32_to_cpu(cmd->sleep_interval[2]),
2216                         le32_to_cpu(cmd->sleep_interval[3]),
2217                         le32_to_cpu(cmd->sleep_interval[4]));
2218
2219         return rc;
2220 }
2221
2222 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2223 {
2224         u32 final_mode = mode;
2225         int rc;
2226         struct iwl_powertable_cmd cmd;
2227
2228         /* If on battery, set to 3,
2229          * if plugged into AC power, set to CAM ("continuosly aware mode"),
2230          * else user level */
2231         switch (mode) {
2232         case IWL_POWER_BATTERY:
2233                 final_mode = IWL_POWER_INDEX_3;
2234                 break;
2235         case IWL_POWER_AC:
2236                 final_mode = IWL_POWER_MODE_CAM;
2237                 break;
2238         default:
2239                 final_mode = mode;
2240                 break;
2241         }
2242
2243         cmd.keep_alive_beacons = 0;
2244
2245         iwl_update_power_cmd(priv, &cmd, final_mode);
2246
2247         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2248
2249         if (final_mode == IWL_POWER_MODE_CAM)
2250                 clear_bit(STATUS_POWER_PMI, &priv->status);
2251         else
2252                 set_bit(STATUS_POWER_PMI, &priv->status);
2253
2254         return rc;
2255 }
2256
2257 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2258 {
2259         /* Filter incoming packets to determine if they are targeted toward
2260          * this network, discarding packets coming from ourselves */
2261         switch (priv->iw_mode) {
2262         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2263                 /* packets from our adapter are dropped (echo) */
2264                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2265                         return 0;
2266                 /* {broad,multi}cast packets to our IBSS go through */
2267                 if (is_multicast_ether_addr(header->addr1))
2268                         return !compare_ether_addr(header->addr3, priv->bssid);
2269                 /* packets to our adapter go through */
2270                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2271         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2272                 /* packets from our adapter are dropped (echo) */
2273                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2274                         return 0;
2275                 /* {broad,multi}cast packets to our BSS go through */
2276                 if (is_multicast_ether_addr(header->addr1))
2277                         return !compare_ether_addr(header->addr2, priv->bssid);
2278                 /* packets to our adapter go through */
2279                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2280         }
2281
2282         return 1;
2283 }
2284
2285 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2286
2287 const char *iwl_get_tx_fail_reason(u32 status)
2288 {
2289         switch (status & TX_STATUS_MSK) {
2290         case TX_STATUS_SUCCESS:
2291                 return "SUCCESS";
2292                 TX_STATUS_ENTRY(SHORT_LIMIT);
2293                 TX_STATUS_ENTRY(LONG_LIMIT);
2294                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2295                 TX_STATUS_ENTRY(MGMNT_ABORT);
2296                 TX_STATUS_ENTRY(NEXT_FRAG);
2297                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2298                 TX_STATUS_ENTRY(DEST_PS);
2299                 TX_STATUS_ENTRY(ABORTED);
2300                 TX_STATUS_ENTRY(BT_RETRY);
2301                 TX_STATUS_ENTRY(STA_INVALID);
2302                 TX_STATUS_ENTRY(FRAG_DROPPED);
2303                 TX_STATUS_ENTRY(TID_DISABLE);
2304                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2305                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2306                 TX_STATUS_ENTRY(TX_LOCKED);
2307                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2308         }
2309
2310         return "UNKNOWN";
2311 }
2312
2313 /**
2314  * iwl_scan_cancel - Cancel any currently executing HW scan
2315  *
2316  * NOTE: priv->mutex is not required before calling this function
2317  */
2318 static int iwl_scan_cancel(struct iwl_priv *priv)
2319 {
2320         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2321                 clear_bit(STATUS_SCANNING, &priv->status);
2322                 return 0;
2323         }
2324
2325         if (test_bit(STATUS_SCANNING, &priv->status)) {
2326                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2327                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2328                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2329                         queue_work(priv->workqueue, &priv->abort_scan);
2330
2331                 } else
2332                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2333
2334                 return test_bit(STATUS_SCANNING, &priv->status);
2335         }
2336
2337         return 0;
2338 }
2339
2340 /**
2341  * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2342  * @ms: amount of time to wait (in milliseconds) for scan to abort
2343  *
2344  * NOTE: priv->mutex must be held before calling this function
2345  */
2346 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2347 {
2348         unsigned long now = jiffies;
2349         int ret;
2350
2351         ret = iwl_scan_cancel(priv);
2352         if (ret && ms) {
2353                 mutex_unlock(&priv->mutex);
2354                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2355                                 test_bit(STATUS_SCANNING, &priv->status))
2356                         msleep(1);
2357                 mutex_lock(&priv->mutex);
2358
2359                 return test_bit(STATUS_SCANNING, &priv->status);
2360         }
2361
2362         return ret;
2363 }
2364
2365 static void iwl_sequence_reset(struct iwl_priv *priv)
2366 {
2367         /* Reset ieee stats */
2368
2369         /* We don't reset the net_device_stats (ieee->stats) on
2370          * re-association */
2371
2372         priv->last_seq_num = -1;
2373         priv->last_frag_num = -1;
2374         priv->last_packet_time = 0;
2375
2376         iwl_scan_cancel(priv);
2377 }
2378
2379 #define MAX_UCODE_BEACON_INTERVAL       4096
2380 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2381
2382 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2383 {
2384         u16 new_val = 0;
2385         u16 beacon_factor = 0;
2386
2387         beacon_factor =
2388             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2389                 / MAX_UCODE_BEACON_INTERVAL;
2390         new_val = beacon_val / beacon_factor;
2391
2392         return cpu_to_le16(new_val);
2393 }
2394
2395 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2396 {
2397         u64 interval_tm_unit;
2398         u64 tsf, result;
2399         unsigned long flags;
2400         struct ieee80211_conf *conf = NULL;
2401         u16 beacon_int = 0;
2402
2403         conf = ieee80211_get_hw_conf(priv->hw);
2404
2405         spin_lock_irqsave(&priv->lock, flags);
2406         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2407         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2408
2409         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2410
2411         tsf = priv->timestamp1;
2412         tsf = ((tsf << 32) | priv->timestamp0);
2413
2414         beacon_int = priv->beacon_int;
2415         spin_unlock_irqrestore(&priv->lock, flags);
2416
2417         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2418                 if (beacon_int == 0) {
2419                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2420                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2421                 } else {
2422                         priv->rxon_timing.beacon_interval =
2423                                 cpu_to_le16(beacon_int);
2424                         priv->rxon_timing.beacon_interval =
2425                             iwl_adjust_beacon_interval(
2426                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2427                 }
2428
2429                 priv->rxon_timing.atim_window = 0;
2430         } else {
2431                 priv->rxon_timing.beacon_interval =
2432                         iwl_adjust_beacon_interval(conf->beacon_int);
2433                 /* TODO: we need to get atim_window from upper stack
2434                  * for now we set to 0 */
2435                 priv->rxon_timing.atim_window = 0;
2436         }
2437
2438         interval_tm_unit =
2439                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2440         result = do_div(tsf, interval_tm_unit);
2441         priv->rxon_timing.beacon_init_val =
2442             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2443
2444         IWL_DEBUG_ASSOC
2445             ("beacon interval %d beacon timer %d beacon tim %d\n",
2446                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2447                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2448                 le16_to_cpu(priv->rxon_timing.atim_window));
2449 }
2450
2451 static int iwl_scan_initiate(struct iwl_priv *priv)
2452 {
2453         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2454                 IWL_ERROR("APs don't scan.\n");
2455                 return 0;
2456         }
2457
2458         if (!iwl_is_ready_rf(priv)) {
2459                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2460                 return -EIO;
2461         }
2462
2463         if (test_bit(STATUS_SCANNING, &priv->status)) {
2464                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2465                 return -EAGAIN;
2466         }
2467
2468         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2469                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2470                                "Queuing.\n");
2471                 return -EAGAIN;
2472         }
2473
2474         IWL_DEBUG_INFO("Starting scan...\n");
2475         priv->scan_bands = 2;
2476         set_bit(STATUS_SCANNING, &priv->status);
2477         priv->scan_start = jiffies;
2478         priv->scan_pass_start = priv->scan_start;
2479
2480         queue_work(priv->workqueue, &priv->request_scan);
2481
2482         return 0;
2483 }
2484
2485 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2486 {
2487         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2488
2489         if (hw_decrypt)
2490                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2491         else
2492                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2493
2494         return 0;
2495 }
2496
2497 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2498 {
2499         if (phymode == MODE_IEEE80211A) {
2500                 priv->staging_rxon.flags &=
2501                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2502                       | RXON_FLG_CCK_MSK);
2503                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2504         } else {
2505                 /* Copied from iwl_bg_post_associate() */
2506                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2507                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2508                 else
2509                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2510
2511                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2512                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2513
2514                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2515                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2516                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2517         }
2518 }
2519
2520 /*
2521  * initilize rxon structure with default values fromm eeprom
2522  */
2523 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2524 {
2525         const struct iwl_channel_info *ch_info;
2526
2527         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2528
2529         switch (priv->iw_mode) {
2530         case IEEE80211_IF_TYPE_AP:
2531                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2532                 break;
2533
2534         case IEEE80211_IF_TYPE_STA:
2535                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2536                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2537                 break;
2538
2539         case IEEE80211_IF_TYPE_IBSS:
2540                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2541                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2542                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2543                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2544                 break;
2545
2546         case IEEE80211_IF_TYPE_MNTR:
2547                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2548                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2549                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2550                 break;
2551         }
2552
2553 #if 0
2554         /* TODO:  Figure out when short_preamble would be set and cache from
2555          * that */
2556         if (!hw_to_local(priv->hw)->short_preamble)
2557                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2558         else
2559                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2560 #endif
2561
2562         ch_info = iwl_get_channel_info(priv, priv->phymode,
2563                                        le16_to_cpu(priv->staging_rxon.channel));
2564
2565         if (!ch_info)
2566                 ch_info = &priv->channel_info[0];
2567
2568         /*
2569          * in some case A channels are all non IBSS
2570          * in this case force B/G channel
2571          */
2572         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2573             !(is_channel_ibss(ch_info)))
2574                 ch_info = &priv->channel_info[0];
2575
2576         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2577         if (is_channel_a_band(ch_info))
2578                 priv->phymode = MODE_IEEE80211A;
2579         else
2580                 priv->phymode = MODE_IEEE80211G;
2581
2582         iwl_set_flags_for_phymode(priv, priv->phymode);
2583
2584         priv->staging_rxon.ofdm_basic_rates =
2585             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2586         priv->staging_rxon.cck_basic_rates =
2587             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2588
2589         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2590                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2591         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2592         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2593         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2594         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2595         iwl4965_set_rxon_chain(priv);
2596 }
2597
2598 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2599 {
2600         if (!iwl_is_ready_rf(priv))
2601                 return -EAGAIN;
2602
2603         if (mode == IEEE80211_IF_TYPE_IBSS) {
2604                 const struct iwl_channel_info *ch_info;
2605
2606                 ch_info = iwl_get_channel_info(priv,
2607                         priv->phymode,
2608                         le16_to_cpu(priv->staging_rxon.channel));
2609
2610                 if (!ch_info || !is_channel_ibss(ch_info)) {
2611                         IWL_ERROR("channel %d not IBSS channel\n",
2612                                   le16_to_cpu(priv->staging_rxon.channel));
2613                         return -EINVAL;
2614                 }
2615         }
2616
2617         cancel_delayed_work(&priv->scan_check);
2618         if (iwl_scan_cancel_timeout(priv, 100)) {
2619                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2620                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2621                 return -EAGAIN;
2622         }
2623
2624         priv->iw_mode = mode;
2625
2626         iwl_connection_init_rx_config(priv);
2627         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2628
2629         iwl_clear_stations_table(priv);
2630
2631         iwl_commit_rxon(priv);
2632
2633         return 0;
2634 }
2635
2636 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2637                                       struct ieee80211_tx_control *ctl,
2638                                       struct iwl_cmd *cmd,
2639                                       struct sk_buff *skb_frag,
2640                                       int last_frag)
2641 {
2642         struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2643
2644         switch (keyinfo->alg) {
2645         case ALG_CCMP:
2646                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2647                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2648                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2649                 break;
2650
2651         case ALG_TKIP:
2652 #if 0
2653                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2654
2655                 if (last_frag)
2656                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2657                                8);
2658                 else
2659                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2660 #endif
2661                 break;
2662
2663         case ALG_WEP:
2664                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2665                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2666
2667                 if (keyinfo->keylen == 13)
2668                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2669
2670                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2671
2672                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2673                              "with key %d\n", ctl->key_idx);
2674                 break;
2675
2676         case ALG_NONE:
2677                 IWL_DEBUG_TX("Tx packet in the clear (encrypt requested).\n");
2678                 break;
2679
2680         default:
2681                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2682                 break;
2683         }
2684 }
2685
2686 /*
2687  * handle build REPLY_TX command notification.
2688  */
2689 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2690                                   struct iwl_cmd *cmd,
2691                                   struct ieee80211_tx_control *ctrl,
2692                                   struct ieee80211_hdr *hdr,
2693                                   int is_unicast, u8 std_id)
2694 {
2695         __le16 *qc;
2696         u16 fc = le16_to_cpu(hdr->frame_control);
2697         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2698
2699         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2700         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2701                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2702                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2703                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2704                 if (ieee80211_is_probe_response(fc) &&
2705                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2706                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2707         } else {
2708                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2709                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2710         }
2711
2712         cmd->cmd.tx.sta_id = std_id;
2713         if (ieee80211_get_morefrag(hdr))
2714                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2715
2716         qc = ieee80211_get_qos_ctrl(hdr);
2717         if (qc) {
2718                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2719                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2720         } else
2721                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2722
2723         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2724                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2725                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2726         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2727                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2728                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2729         }
2730
2731         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2732                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2733
2734         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2735         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2736                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2737                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2738                         cmd->cmd.tx.timeout.pm_frame_timeout =
2739                                 cpu_to_le16(3);
2740                 else
2741                         cmd->cmd.tx.timeout.pm_frame_timeout =
2742                                 cpu_to_le16(2);
2743         } else
2744                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2745
2746         cmd->cmd.tx.driver_txop = 0;
2747         cmd->cmd.tx.tx_flags = tx_flags;
2748         cmd->cmd.tx.next_frame_len = 0;
2749 }
2750
2751 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2752 {
2753         int sta_id;
2754         u16 fc = le16_to_cpu(hdr->frame_control);
2755         DECLARE_MAC_BUF(mac);
2756
2757         /* If this frame is broadcast or not data then use the broadcast
2758          * station id */
2759         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2760             is_multicast_ether_addr(hdr->addr1))
2761                 return priv->hw_setting.bcast_sta_id;
2762
2763         switch (priv->iw_mode) {
2764
2765         /* If this frame is part of a BSS network (we're a station), then
2766          * we use the AP's station id */
2767         case IEEE80211_IF_TYPE_STA:
2768                 return IWL_AP_ID;
2769
2770         /* If we are an AP, then find the station, or use BCAST */
2771         case IEEE80211_IF_TYPE_AP:
2772                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2773                 if (sta_id != IWL_INVALID_STATION)
2774                         return sta_id;
2775                 return priv->hw_setting.bcast_sta_id;
2776
2777         /* If this frame is part of a IBSS network, then we use the
2778          * target specific station id */
2779         case IEEE80211_IF_TYPE_IBSS:
2780                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2781                 if (sta_id != IWL_INVALID_STATION)
2782                         return sta_id;
2783
2784                 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2785
2786                 if (sta_id != IWL_INVALID_STATION)
2787                         return sta_id;
2788
2789                 IWL_DEBUG_DROP("Station %s not in station map. "
2790                                "Defaulting to broadcast...\n",
2791                                print_mac(mac, hdr->addr1));
2792                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2793                 return priv->hw_setting.bcast_sta_id;
2794
2795         default:
2796                 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2797                 return priv->hw_setting.bcast_sta_id;
2798         }
2799 }
2800
2801 /*
2802  * start REPLY_TX command process
2803  */
2804 static int iwl_tx_skb(struct iwl_priv *priv,
2805                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2806 {
2807         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2808         struct iwl_tfd_frame *tfd;
2809         u32 *control_flags;
2810         int txq_id = ctl->queue;
2811         struct iwl_tx_queue *txq = NULL;
2812         struct iwl_queue *q = NULL;
2813         dma_addr_t phys_addr;
2814         dma_addr_t txcmd_phys;
2815         struct iwl_cmd *out_cmd = NULL;
2816         u16 len, idx, len_org;
2817         u8 id, hdr_len, unicast;
2818         u8 sta_id;
2819         u16 seq_number = 0;
2820         u16 fc;
2821         __le16 *qc;
2822         u8 wait_write_ptr = 0;
2823         unsigned long flags;
2824         int rc;
2825
2826         spin_lock_irqsave(&priv->lock, flags);
2827         if (iwl_is_rfkill(priv)) {
2828                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2829                 goto drop_unlock;
2830         }
2831
2832         if (!priv->interface_id) {
2833                 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2834                 goto drop_unlock;
2835         }
2836
2837         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2838                 IWL_ERROR("ERROR: No TX rate available.\n");
2839                 goto drop_unlock;
2840         }
2841
2842         unicast = !is_multicast_ether_addr(hdr->addr1);
2843         id = 0;
2844
2845         fc = le16_to_cpu(hdr->frame_control);
2846
2847 #ifdef CONFIG_IWLWIFI_DEBUG
2848         if (ieee80211_is_auth(fc))
2849                 IWL_DEBUG_TX("Sending AUTH frame\n");
2850         else if (ieee80211_is_assoc_request(fc))
2851                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2852         else if (ieee80211_is_reassoc_request(fc))
2853                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2854 #endif
2855
2856         if (!iwl_is_associated(priv) &&
2857             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2858                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2859                 goto drop_unlock;
2860         }
2861
2862         spin_unlock_irqrestore(&priv->lock, flags);
2863
2864         hdr_len = ieee80211_get_hdrlen(fc);
2865         sta_id = iwl_get_sta_id(priv, hdr);
2866         if (sta_id == IWL_INVALID_STATION) {
2867                 DECLARE_MAC_BUF(mac);
2868
2869                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2870                                print_mac(mac, hdr->addr1));
2871                 goto drop;
2872         }
2873
2874         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2875
2876         qc = ieee80211_get_qos_ctrl(hdr);
2877         if (qc) {
2878                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2879                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2880                                 IEEE80211_SCTL_SEQ;
2881                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2882                         (hdr->seq_ctrl &
2883                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2884                 seq_number += 0x10;
2885 #ifdef CONFIG_IWLWIFI_HT
2886 #ifdef CONFIG_IWLWIFI_HT_AGG
2887                 /* aggregation is on for this <sta,tid> */
2888                 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2889                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2890 #endif /* CONFIG_IWLWIFI_HT_AGG */
2891 #endif /* CONFIG_IWLWIFI_HT */
2892         }
2893         txq = &priv->txq[txq_id];
2894         q = &txq->q;
2895
2896         spin_lock_irqsave(&priv->lock, flags);
2897
2898         tfd = &txq->bd[q->first_empty];
2899         memset(tfd, 0, sizeof(*tfd));
2900         control_flags = (u32 *) tfd;
2901         idx = get_cmd_index(q, q->first_empty, 0);
2902
2903         memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2904         txq->txb[q->first_empty].skb[0] = skb;
2905         memcpy(&(txq->txb[q->first_empty].status.control),
2906                ctl, sizeof(struct ieee80211_tx_control));
2907         out_cmd = &txq->cmd[idx];
2908         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2909         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2910         out_cmd->hdr.cmd = REPLY_TX;
2911         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2912                                 INDEX_TO_SEQ(q->first_empty)));
2913         /* copy frags header */
2914         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2915
2916         /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2917         len = priv->hw_setting.tx_cmd_len +
2918                 sizeof(struct iwl_cmd_header) + hdr_len;
2919
2920         len_org = len;
2921         len = (len + 3) & ~3;
2922
2923         if (len_org != len)
2924                 len_org = 1;
2925         else
2926                 len_org = 0;
2927
2928         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2929                      offsetof(struct iwl_cmd, hdr);
2930
2931         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2932
2933         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2934                 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2935
2936         /* 802.11 null functions have no payload... */
2937         len = skb->len - hdr_len;
2938         if (len) {
2939                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2940                                            len, PCI_DMA_TODEVICE);
2941                 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2942         }
2943
2944         if (len_org)
2945                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2946
2947         len = (u16)skb->len;
2948         out_cmd->cmd.tx.len = cpu_to_le16(len);
2949
2950         /* TODO need this for burst mode later on */
2951         iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2952
2953         /* set is_hcca to 0; it probably will never be implemented */
2954         iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2955
2956         iwl4965_tx_cmd(priv, out_cmd, sta_id, txcmd_phys,
2957                        hdr, hdr_len, ctl, NULL);
2958
2959         if (!ieee80211_get_morefrag(hdr)) {
2960                 txq->need_update = 1;
2961                 if (qc) {
2962                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2963                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2964                 }
2965         } else {
2966                 wait_write_ptr = 1;
2967                 txq->need_update = 0;
2968         }
2969
2970         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2971                            sizeof(out_cmd->cmd.tx));
2972
2973         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2974                            ieee80211_get_hdrlen(fc));
2975
2976         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2977
2978         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2979         rc = iwl_tx_queue_update_write_ptr(priv, txq);
2980         spin_unlock_irqrestore(&priv->lock, flags);
2981
2982         if (rc)
2983                 return rc;
2984
2985         if ((iwl_queue_space(q) < q->high_mark)
2986             && priv->mac80211_registered) {
2987                 if (wait_write_ptr) {
2988                         spin_lock_irqsave(&priv->lock, flags);
2989                         txq->need_update = 1;
2990                         iwl_tx_queue_update_write_ptr(priv, txq);
2991                         spin_unlock_irqrestore(&priv->lock, flags);
2992                 }
2993
2994                 ieee80211_stop_queue(priv->hw, ctl->queue);
2995         }
2996
2997         return 0;
2998
2999 drop_unlock:
3000         spin_unlock_irqrestore(&priv->lock, flags);
3001 drop:
3002         return -1;
3003 }
3004
3005 static void iwl_set_rate(struct iwl_priv *priv)
3006 {
3007         const struct ieee80211_hw_mode *hw = NULL;
3008         struct ieee80211_rate *rate;
3009         int i;
3010
3011         hw = iwl_get_hw_mode(priv, priv->phymode);
3012
3013         priv->active_rate = 0;
3014         priv->active_rate_basic = 0;
3015
3016         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3017                        hw->mode == MODE_IEEE80211A ?
3018                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3019
3020         for (i = 0; i < hw->num_rates; i++) {
3021                 rate = &(hw->rates[i]);
3022                 if ((rate->val < IWL_RATE_COUNT) &&
3023                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3024                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3025                                        rate->val, iwl_rates[rate->val].plcp,
3026                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3027                                        "*" : "");
3028                         priv->active_rate |= (1 << rate->val);
3029                         if (rate->flags & IEEE80211_RATE_BASIC)
3030                                 priv->active_rate_basic |= (1 << rate->val);
3031                 } else
3032                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3033                                        rate->val, iwl_rates[rate->val].plcp);
3034         }
3035
3036         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3037                        priv->active_rate, priv->active_rate_basic);
3038
3039         /*
3040          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3041          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3042          * OFDM
3043          */
3044         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3045                 priv->staging_rxon.cck_basic_rates =
3046                     ((priv->active_rate_basic &
3047                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3048         else
3049                 priv->staging_rxon.cck_basic_rates =
3050                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3051
3052         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3053                 priv->staging_rxon.ofdm_basic_rates =
3054                     ((priv->active_rate_basic &
3055                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3056                       IWL_FIRST_OFDM_RATE) & 0xFF;
3057         else
3058                 priv->staging_rxon.ofdm_basic_rates =
3059                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3060 }
3061
3062 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
3063 {
3064         unsigned long flags;
3065
3066         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3067                 return;
3068
3069         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3070                           disable_radio ? "OFF" : "ON");
3071
3072         if (disable_radio) {
3073                 iwl_scan_cancel(priv);
3074                 /* FIXME: This is a workaround for AP */
3075                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3076                         spin_lock_irqsave(&priv->lock, flags);
3077                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3078                                     CSR_UCODE_SW_BIT_RFKILL);
3079                         spin_unlock_irqrestore(&priv->lock, flags);
3080                         iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3081                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3082                 }
3083                 return;
3084         }
3085
3086         spin_lock_irqsave(&priv->lock, flags);
3087         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3088
3089         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3090         spin_unlock_irqrestore(&priv->lock, flags);
3091
3092         /* wake up ucode */
3093         msleep(10);
3094
3095         spin_lock_irqsave(&priv->lock, flags);
3096         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3097         if (!iwl_grab_restricted_access(priv))
3098                 iwl_release_restricted_access(priv);
3099         spin_unlock_irqrestore(&priv->lock, flags);
3100
3101         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3102                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3103                                   "disabled by HW switch\n");
3104                 return;
3105         }
3106
3107         queue_work(priv->workqueue, &priv->restart);
3108         return;
3109 }
3110
3111 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3112                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3113 {
3114         u16 fc =
3115             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3116
3117         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3118                 return;
3119
3120         if (!(fc & IEEE80211_FCTL_PROTECTED))
3121                 return;
3122
3123         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3124         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3125         case RX_RES_STATUS_SEC_TYPE_TKIP:
3126                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3127                     RX_RES_STATUS_BAD_ICV_MIC)
3128                         stats->flag |= RX_FLAG_MMIC_ERROR;
3129         case RX_RES_STATUS_SEC_TYPE_WEP:
3130         case RX_RES_STATUS_SEC_TYPE_CCMP:
3131                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3132                     RX_RES_STATUS_DECRYPT_OK) {
3133                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3134                         stats->flag |= RX_FLAG_DECRYPTED;
3135                 }
3136                 break;
3137
3138         default:
3139                 break;
3140         }
3141 }
3142
3143 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3144                                     struct iwl_rx_mem_buffer *rxb,
3145                                     void *data, short len,
3146                                     struct ieee80211_rx_status *stats,
3147                                     u16 phy_flags)
3148 {
3149         struct iwl_rt_rx_hdr *iwl_rt;
3150
3151         /* First cache any information we need before we overwrite
3152          * the information provided in the skb from the hardware */
3153         s8 signal = stats->ssi;
3154         s8 noise = 0;
3155         int rate = stats->rate;
3156         u64 tsf = stats->mactime;
3157         __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3158
3159         /* We received data from the HW, so stop the watchdog */
3160         if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3161                 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3162                 return;
3163         }
3164
3165         /* copy the frame data to write after where the radiotap header goes */
3166         iwl_rt = (void *)rxb->skb->data;
3167         memmove(iwl_rt->payload, data, len);
3168
3169         iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3170         iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3171
3172         /* total header + data */
3173         iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3174
3175         /* Set the size of the skb to the size of the frame */
3176         skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3177
3178         /* Big bitfield of all the fields we provide in radiotap */
3179         iwl_rt->rt_hdr.it_present =
3180             cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3181                         (1 << IEEE80211_RADIOTAP_FLAGS) |
3182                         (1 << IEEE80211_RADIOTAP_RATE) |
3183                         (1 << IEEE80211_RADIOTAP_CHANNEL) |
3184                         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3185                         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3186                         (1 << IEEE80211_RADIOTAP_ANTENNA));
3187
3188         /* Zero the flags, we'll add to them as we go */
3189         iwl_rt->rt_flags = 0;
3190
3191         iwl_rt->rt_tsf = cpu_to_le64(tsf);
3192
3193         /* Convert to dBm */
3194         iwl_rt->rt_dbmsignal = signal;
3195         iwl_rt->rt_dbmnoise = noise;
3196
3197         /* Convert the channel frequency and set the flags */
3198         iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3199         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3200                 iwl_rt->rt_chbitmask =
3201                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3202         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3203                 iwl_rt->rt_chbitmask =
3204                     cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3205         else    /* 802.11g */
3206                 iwl_rt->rt_chbitmask =
3207                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3208
3209         rate = iwl_rate_index_from_plcp(rate);
3210         if (rate == -1)
3211                 iwl_rt->rt_rate = 0;
3212         else
3213                 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3214
3215         /* antenna number */
3216         iwl_rt->rt_antenna =
3217                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3218
3219         /* set the preamble flag if we have it */
3220         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3221                 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3222
3223         IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3224
3225         stats->flag |= RX_FLAG_RADIOTAP;
3226         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3227         rxb->skb = NULL;
3228 }
3229
3230
3231 #define IWL_PACKET_RETRY_TIME HZ
3232
3233 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3234 {
3235         u16 sc = le16_to_cpu(header->seq_ctrl);
3236         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3237         u16 frag = sc & IEEE80211_SCTL_FRAG;
3238         u16 *last_seq, *last_frag;
3239         unsigned long *last_time;
3240
3241         switch (priv->iw_mode) {
3242         case IEEE80211_IF_TYPE_IBSS:{
3243                 struct list_head *p;
3244                 struct iwl_ibss_seq *entry = NULL;
3245                 u8 *mac = header->addr2;
3246                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3247
3248                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3249                         entry =
3250                                 list_entry(p, struct iwl_ibss_seq, list);
3251                         if (!compare_ether_addr(entry->mac, mac))
3252                                 break;
3253                 }
3254                 if (p == &priv->ibss_mac_hash[index]) {
3255                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3256                         if (!entry) {
3257                                 IWL_ERROR
3258                                         ("Cannot malloc new mac entry\n");
3259                                 return 0;
3260                         }
3261                         memcpy(entry->mac, mac, ETH_ALEN);
3262                         entry->seq_num = seq;
3263                         entry->frag_num = frag;
3264                         entry->packet_time = jiffies;
3265                         list_add(&entry->list,
3266                                  &priv->ibss_mac_hash[index]);
3267                         return 0;
3268                 }
3269                 last_seq = &entry->seq_num;
3270                 last_frag = &entry->frag_num;
3271                 last_time = &entry->packet_time;
3272                 break;
3273         }
3274         case IEEE80211_IF_TYPE_STA:
3275                 last_seq = &priv->last_seq_num;
3276                 last_frag = &priv->last_frag_num;
3277                 last_time = &priv->last_packet_time;
3278                 break;
3279         default:
3280                 return 0;
3281         }
3282         if ((*last_seq == seq) &&
3283             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3284                 if (*last_frag == frag)
3285                         goto drop;
3286                 if (*last_frag + 1 != frag)
3287                         /* out-of-order fragment */
3288                         goto drop;
3289         } else
3290                 *last_seq = seq;
3291
3292         *last_frag = frag;
3293         *last_time = jiffies;
3294         return 0;
3295
3296  drop:
3297         return 1;
3298 }
3299
3300 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3301
3302 #include "iwl-spectrum.h"
3303
3304 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3305 #define BEACON_TIME_MASK_HIGH   0xFF000000
3306 #define TIME_UNIT               1024
3307
3308 /*
3309  * extended beacon time format
3310  * time in usec will be changed into a 32-bit value in 8:24 format
3311  * the high 1 byte is the beacon counts
3312  * the lower 3 bytes is the time in usec within one beacon interval
3313  */
3314
3315 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3316 {
3317         u32 quot;
3318         u32 rem;
3319         u32 interval = beacon_interval * 1024;
3320
3321         if (!interval || !usec)
3322                 return 0;
3323
3324         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3325         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3326
3327         return (quot << 24) + rem;
3328 }
3329
3330 /* base is usually what we get from ucode with each received frame,
3331  * the same as HW timer counter counting down
3332  */
3333
3334 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3335 {
3336         u32 base_low = base & BEACON_TIME_MASK_LOW;
3337         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3338         u32 interval = beacon_interval * TIME_UNIT;
3339         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3340             (addon & BEACON_TIME_MASK_HIGH);
3341
3342         if (base_low > addon_low)
3343                 res += base_low - addon_low;
3344         else if (base_low < addon_low) {
3345                 res += interval + base_low - addon_low;
3346                 res += (1 << 24);
3347         } else
3348                 res += (1 << 24);
3349
3350         return cpu_to_le32(res);
3351 }
3352
3353 static int iwl_get_measurement(struct iwl_priv *priv,
3354                                struct ieee80211_measurement_params *params,
3355                                u8 type)
3356 {
3357         struct iwl_spectrum_cmd spectrum;
3358         struct iwl_rx_packet *res;
3359         struct iwl_host_cmd cmd = {
3360                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3361                 .data = (void *)&spectrum,
3362                 .meta.flags = CMD_WANT_SKB,
3363         };
3364         u32 add_time = le64_to_cpu(params->start_time);
3365         int rc;
3366         int spectrum_resp_status;
3367         int duration = le16_to_cpu(params->duration);
3368
3369         if (iwl_is_associated(priv))
3370                 add_time =
3371                     iwl_usecs_to_beacons(
3372                         le64_to_cpu(params->start_time) - priv->last_tsf,
3373                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3374
3375         memset(&spectrum, 0, sizeof(spectrum));
3376
3377         spectrum.channel_count = cpu_to_le16(1);
3378         spectrum.flags =
3379             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3380         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3381         cmd.len = sizeof(spectrum);
3382         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3383
3384         if (iwl_is_associated(priv))
3385                 spectrum.start_time =
3386                     iwl_add_beacon_time(priv->last_beacon_time,
3387                                 add_time,
3388                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3389         else
3390                 spectrum.start_time = 0;
3391
3392         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3393         spectrum.channels[0].channel = params->channel;
3394         spectrum.channels[0].type = type;
3395         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3396                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3397                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3398
3399         rc = iwl_send_cmd_sync(priv, &cmd);
3400         if (rc)
3401                 return rc;
3402
3403         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3404         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3405                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3406                 rc = -EIO;
3407         }
3408
3409         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3410         switch (spectrum_resp_status) {
3411         case 0:         /* Command will be handled */
3412                 if (res->u.spectrum.id != 0xff) {
3413                         IWL_DEBUG_INFO
3414                             ("Replaced existing measurement: %d\n",
3415                              res->u.spectrum.id);
3416                         priv->measurement_status &= ~MEASUREMENT_READY;
3417                 }
3418                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3419                 rc = 0;
3420                 break;
3421
3422         case 1:         /* Command will not be handled */
3423                 rc = -EAGAIN;
3424                 break;
3425         }
3426
3427         dev_kfree_skb_any(cmd.meta.u.skb);
3428
3429         return rc;
3430 }
3431 #endif
3432
3433 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3434                                  struct iwl_tx_info *tx_sta)
3435 {
3436
3437         tx_sta->status.ack_signal = 0;
3438         tx_sta->status.excessive_retries = 0;
3439         tx_sta->status.queue_length = 0;
3440         tx_sta->status.queue_number = 0;
3441
3442         if (in_interrupt())
3443                 ieee80211_tx_status_irqsafe(priv->hw,
3444                                             tx_sta->skb[0], &(tx_sta->status));
3445         else
3446                 ieee80211_tx_status(priv->hw,
3447                                     tx_sta->skb[0], &(tx_sta->status));
3448
3449         tx_sta->skb[0] = NULL;
3450 }
3451
3452 /**
3453  * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3454  *
3455  * When FW advances 'R' index, all entries between old and
3456  * new 'R' index need to be reclaimed. As result, some free space
3457  * forms. If there is enough free space (> low mark), wake Tx queue.
3458  */
3459 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3460 {
3461         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3462         struct iwl_queue *q = &txq->q;
3463         int nfreed = 0;
3464
3465         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3466                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3467                           "is out of range [0-%d] %d %d.\n", txq_id,
3468                           index, q->n_bd, q->first_empty, q->last_used);
3469                 return 0;
3470         }
3471
3472         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3473                 q->last_used != index;
3474                 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3475                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3476                         iwl_txstatus_to_ieee(priv,
3477                                         &(txq->txb[txq->q.last_used]));
3478                         iwl_hw_txq_free_tfd(priv, txq);
3479                 } else if (nfreed > 1) {
3480                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3481                                         q->first_empty, q->last_used);
3482                         queue_work(priv->workqueue, &priv->restart);
3483                 }
3484                 nfreed++;
3485         }
3486
3487         if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3488                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3489                         priv->mac80211_registered)
3490                 ieee80211_wake_queue(priv->hw, txq_id);
3491
3492
3493         return nfreed;
3494 }
3495
3496 static int iwl_is_tx_success(u32 status)
3497 {
3498         status &= TX_STATUS_MSK;
3499         return (status == TX_STATUS_SUCCESS)
3500             || (status == TX_STATUS_DIRECT_DONE);
3501 }
3502
3503 /******************************************************************************
3504  *
3505  * Generic RX handler implementations
3506  *
3507  ******************************************************************************/
3508 #ifdef CONFIG_IWLWIFI_HT
3509 #ifdef CONFIG_IWLWIFI_HT_AGG
3510
3511 static inline int iwl_get_ra_sta_id(struct iwl_priv *priv,
3512                                     struct ieee80211_hdr *hdr)
3513 {
3514         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3515                 return IWL_AP_ID;
3516         else {
3517                 u8 *da = ieee80211_get_DA(hdr);
3518                 return iwl_hw_find_station(priv, da);
3519         }
3520 }
3521
3522 static struct ieee80211_hdr *iwl_tx_queue_get_hdr(
3523         struct iwl_priv *priv, int txq_id, int idx)
3524 {
3525         if (priv->txq[txq_id].txb[idx].skb[0])
3526                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3527                                 txb[idx].skb[0]->data;
3528         return NULL;
3529 }
3530
3531 static inline u32 iwl_get_scd_ssn(struct iwl_tx_resp *tx_resp)
3532 {
3533         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3534                                 tx_resp->frame_count);
3535         return le32_to_cpu(*scd_ssn) & MAX_SN;
3536
3537 }
3538 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3539                                       struct iwl_ht_agg *agg,
3540                                       struct iwl_tx_resp *tx_resp,
3541                                       u16 start_idx)
3542 {
3543         u32 status;
3544         __le32 *frame_status = &tx_resp->status;
3545         struct ieee80211_tx_status *tx_status = NULL;
3546         struct ieee80211_hdr *hdr = NULL;
3547         int i, sh;
3548         int txq_id, idx;
3549         u16 seq;
3550
3551         if (agg->wait_for_ba)
3552                 IWL_DEBUG_TX_REPLY("got tx repsons w/o back\n");
3553
3554         agg->frame_count = tx_resp->frame_count;
3555         agg->start_idx = start_idx;
3556         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3557         agg->bitmap0 = agg->bitmap1 = 0;
3558
3559         if (agg->frame_count == 1) {
3560                 struct iwl_tx_queue *txq ;
3561                 status = le32_to_cpu(frame_status[0]);
3562
3563                 txq_id = agg->txq_id;
3564                 txq = &priv->txq[txq_id];
3565                 /* FIXME: code repetition */
3566                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3567                                    agg->frame_count, agg->start_idx);
3568
3569                 tx_status = &(priv->txq[txq_id].txb[txq->q.last_used].status);
3570                 tx_status->retry_count = tx_resp->failure_frame;
3571                 tx_status->queue_number = status & 0xff;
3572                 tx_status->queue_length = tx_resp->bt_kill_count;
3573                 tx_status->queue_length |= tx_resp->failure_rts;
3574
3575                 tx_status->flags = iwl_is_tx_success(status)?
3576                         IEEE80211_TX_STATUS_ACK : 0;
3577                 tx_status->control.tx_rate =
3578                                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3579                 /* FIXME: code repetition end */
3580
3581                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3582                                     status & 0xff, tx_resp->failure_frame);
3583                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3584                                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3585
3586                 agg->wait_for_ba = 0;
3587         } else {
3588                 u64 bitmap = 0;
3589                 int start = agg->start_idx;
3590
3591                 for (i = 0; i < agg->frame_count; i++) {
3592                         u16 sc;
3593                         status = le32_to_cpu(frame_status[i]);
3594                         seq  = status >> 16;
3595                         idx = SEQ_TO_INDEX(seq);
3596                         txq_id = SEQ_TO_QUEUE(seq);
3597
3598                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3599                                       AGG_TX_STATE_ABORT_MSK))
3600                                 continue;
3601
3602                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3603                                            agg->frame_count, txq_id, idx);
3604
3605                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3606
3607                         sc = le16_to_cpu(hdr->seq_ctrl);
3608                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3609                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3610                                           " idx=%d, seq_idx=%d, seq=%d\n",
3611                                           idx, SEQ_TO_SN(sc),
3612                                           hdr->seq_ctrl);
3613                                 return -1;
3614                         }
3615
3616                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3617                                            i, idx, SEQ_TO_SN(sc));
3618
3619                         sh = idx - start;
3620                         if (sh > 64) {
3621                                 sh = (start - idx) + 0xff;
3622                                 bitmap = bitmap << sh;
3623                                 sh = 0;
3624                                 start = idx;
3625                         } else if (sh < -64)
3626                                 sh  = 0xff - (start - idx);
3627                         else if (sh < 0) {
3628                                 sh = start - idx;
3629                                 start = idx;
3630                                 bitmap = bitmap << sh;
3631                                 sh = 0;
3632                         }
3633                         bitmap |= (1 << sh);
3634                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3635                                            start, (u32)(bitmap & 0xFFFFFFFF));
3636                 }
3637
3638                 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3639                 agg->bitmap1 = bitmap >> 32;
3640                 agg->start_idx = start;
3641                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3642                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3643                                    agg->frame_count, agg->start_idx,
3644                                    agg->bitmap0);
3645
3646                 if (bitmap)
3647                         agg->wait_for_ba = 1;
3648         }
3649         return 0;
3650 }
3651 #endif
3652 #endif
3653
3654 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3655                             struct iwl_rx_mem_buffer *rxb)
3656 {
3657         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3658         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3659         int txq_id = SEQ_TO_QUEUE(sequence);
3660         int index = SEQ_TO_INDEX(sequence);
3661         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3662         struct ieee80211_tx_status *tx_status;
3663         struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3664         u32  status = le32_to_cpu(tx_resp->status);
3665 #ifdef CONFIG_IWLWIFI_HT
3666 #ifdef CONFIG_IWLWIFI_HT_AGG
3667         int tid, sta_id;
3668 #endif
3669 #endif
3670
3671         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3672                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3673                           "is out of range [0-%d] %d %d\n", txq_id,
3674                           index, txq->q.n_bd, txq->q.first_empty,
3675                           txq->q.last_used);
3676                 return;
3677         }
3678
3679 #ifdef CONFIG_IWLWIFI_HT
3680 #ifdef CONFIG_IWLWIFI_HT_AGG
3681         if (txq->sched_retry) {
3682                 const u32 scd_ssn = iwl_get_scd_ssn(tx_resp);
3683                 struct ieee80211_hdr *hdr =
3684                         iwl_tx_queue_get_hdr(priv, txq_id, index);
3685                 struct iwl_ht_agg *agg = NULL;
3686                 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3687
3688                 if (qc == NULL) {
3689                         IWL_ERROR("BUG_ON qc is null!!!!\n");
3690                         return;
3691                 }
3692
3693                 tid = le16_to_cpu(*qc) & 0xf;
3694
3695                 sta_id = iwl_get_ra_sta_id(priv, hdr);
3696                 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3697                         IWL_ERROR("Station not known for\n");
3698                         return;
3699                 }
3700
3701                 agg = &priv->stations[sta_id].tid[tid].agg;
3702
3703                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3704
3705                 if ((tx_resp->frame_count == 1) &&
3706                     !iwl_is_tx_success(status)) {
3707                         /* TODO: send BAR */
3708                 }
3709
3710                 if ((txq->q.last_used != (scd_ssn & 0xff))) {
3711                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3712                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3713                                            "%d index %d\n", scd_ssn , index);
3714                         iwl_tx_queue_reclaim(priv, txq_id, index);
3715                 }
3716         } else {
3717 #endif /* CONFIG_IWLWIFI_HT_AGG */
3718 #endif /* CONFIG_IWLWIFI_HT */
3719         tx_status = &(txq->txb[txq->q.last_used].status);
3720
3721         tx_status->retry_count = tx_resp->failure_frame;
3722         tx_status->queue_number = status;
3723         tx_status->queue_length = tx_resp->bt_kill_count;
3724         tx_status->queue_length |= tx_resp->failure_rts;
3725
3726         tx_status->flags =
3727             iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3728
3729         tx_status->control.tx_rate =
3730                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3731
3732         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3733                      "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3734                      status, le32_to_cpu(tx_resp->rate_n_flags),
3735                      tx_resp->failure_frame);
3736
3737         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3738         if (index != -1)
3739                 iwl_tx_queue_reclaim(priv, txq_id, index);
3740 #ifdef CONFIG_IWLWIFI_HT
3741 #ifdef CONFIG_IWLWIFI_HT_AGG
3742         }
3743 #endif /* CONFIG_IWLWIFI_HT_AGG */
3744 #endif /* CONFIG_IWLWIFI_HT */
3745
3746         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3747                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3748 }
3749
3750
3751 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3752                                struct iwl_rx_mem_buffer *rxb)
3753 {
3754         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3755         struct iwl_alive_resp *palive;
3756         struct delayed_work *pwork;
3757
3758         palive = &pkt->u.alive_frame;
3759
3760         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3761                        "0x%01X 0x%01X\n",
3762                        palive->is_valid, palive->ver_type,
3763                        palive->ver_subtype);
3764
3765         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3766                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3767                 memcpy(&priv->card_alive_init,
3768                        &pkt->u.alive_frame,
3769                        sizeof(struct iwl_init_alive_resp));
3770                 pwork = &priv->init_alive_start;
3771         } else {
3772                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3773                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3774                        sizeof(struct iwl_alive_resp));
3775                 pwork = &priv->alive_start;
3776         }
3777
3778         /* We delay the ALIVE response by 5ms to
3779          * give the HW RF Kill time to activate... */
3780         if (palive->is_valid == UCODE_VALID_OK)
3781                 queue_delayed_work(priv->workqueue, pwork,
3782                                    msecs_to_jiffies(5));
3783         else
3784                 IWL_WARNING("uCode did not respond OK.\n");
3785 }
3786
3787 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3788                                  struct iwl_rx_mem_buffer *rxb)
3789 {
3790         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3791
3792         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3793         return;
3794 }
3795
3796 static void iwl_rx_reply_error(struct iwl_priv *priv,
3797                                struct iwl_rx_mem_buffer *rxb)
3798 {
3799         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3800
3801         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3802                 "seq 0x%04X ser 0x%08X\n",
3803                 le32_to_cpu(pkt->u.err_resp.error_type),
3804                 get_cmd_string(pkt->u.err_resp.cmd_id),
3805                 pkt->u.err_resp.cmd_id,
3806                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3807                 le32_to_cpu(pkt->u.err_resp.error_info));
3808 }
3809
3810 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3811
3812 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3813 {
3814         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3815         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3816         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3817         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3818                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3819         rxon->channel = csa->channel;
3820         priv->staging_rxon.channel = csa->channel;
3821 }
3822
3823 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3824                                           struct iwl_rx_mem_buffer *rxb)
3825 {
3826 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3827         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3828         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3829
3830         if (!report->state) {
3831                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3832                           "Spectrum Measure Notification: Start\n");
3833                 return;
3834         }
3835
3836         memcpy(&priv->measure_report, report, sizeof(*report));
3837         priv->measurement_status |= MEASUREMENT_READY;
3838 #endif
3839 }
3840
3841 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3842                                   struct iwl_rx_mem_buffer *rxb)
3843 {
3844 #ifdef CONFIG_IWLWIFI_DEBUG
3845         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3846         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3847         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3848                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3849 #endif
3850 }
3851
3852 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3853                                              struct iwl_rx_mem_buffer *rxb)
3854 {
3855         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3856         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3857                         "notification for %s:\n",
3858                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3859         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3860 }
3861
3862 static void iwl_bg_beacon_update(struct work_struct *work)
3863 {
3864         struct iwl_priv *priv =
3865                 container_of(work, struct iwl_priv, beacon_update);
3866         struct sk_buff *beacon;
3867
3868         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3869         beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3870
3871         if (!beacon) {
3872                 IWL_ERROR("update beacon failed\n");
3873                 return;
3874         }
3875
3876         mutex_lock(&priv->mutex);
3877         /* new beacon skb is allocated every time; dispose previous.*/
3878         if (priv->ibss_beacon)
3879                 dev_kfree_skb(priv->ibss_beacon);
3880
3881         priv->ibss_beacon = beacon;
3882         mutex_unlock(&priv->mutex);
3883
3884         iwl_send_beacon_cmd(priv);
3885 }
3886
3887 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3888                                 struct iwl_rx_mem_buffer *rxb)
3889 {
3890 #ifdef CONFIG_IWLWIFI_DEBUG
3891         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3892         struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3893         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3894
3895         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3896                 "tsf %d %d rate %d\n",
3897                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3898                 beacon->beacon_notify_hdr.failure_frame,
3899                 le32_to_cpu(beacon->ibss_mgr_status),
3900                 le32_to_cpu(beacon->high_tsf),
3901                 le32_to_cpu(beacon->low_tsf), rate);
3902 #endif
3903
3904         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3905             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3906                 queue_work(priv->workqueue, &priv->beacon_update);
3907 }
3908
3909 /* Service response to REPLY_SCAN_CMD (0x80) */
3910 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3911                               struct iwl_rx_mem_buffer *rxb)
3912 {
3913 #ifdef CONFIG_IWLWIFI_DEBUG
3914         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3915         struct iwl_scanreq_notification *notif =
3916             (struct iwl_scanreq_notification *)pkt->u.raw;
3917
3918         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3919 #endif
3920 }
3921
3922 /* Service SCAN_START_NOTIFICATION (0x82) */
3923 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3924                                     struct iwl_rx_mem_buffer *rxb)
3925 {
3926         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3927         struct iwl_scanstart_notification *notif =
3928             (struct iwl_scanstart_notification *)pkt->u.raw;
3929         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3930         IWL_DEBUG_SCAN("Scan start: "
3931                        "%d [802.11%s] "
3932                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3933                        notif->channel,
3934                        notif->band ? "bg" : "a",
3935                        notif->tsf_high,
3936                        notif->tsf_low, notif->status, notif->beacon_timer);
3937 }
3938
3939 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3940 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3941                                       struct iwl_rx_mem_buffer *rxb)
3942 {
3943         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3944         struct iwl_scanresults_notification *notif =
3945             (struct iwl_scanresults_notification *)pkt->u.raw;
3946
3947         IWL_DEBUG_SCAN("Scan ch.res: "
3948                        "%d [802.11%s] "
3949                        "(TSF: 0x%08X:%08X) - %d "
3950                        "elapsed=%lu usec (%dms since last)\n",
3951                        notif->channel,
3952                        notif->band ? "bg" : "a",
3953                        le32_to_cpu(notif->tsf_high),
3954                        le32_to_cpu(notif->tsf_low),
3955                        le32_to_cpu(notif->statistics[0]),
3956                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3957                        jiffies_to_msecs(elapsed_jiffies
3958                                         (priv->last_scan_jiffies, jiffies)));
3959
3960         priv->last_scan_jiffies = jiffies;
3961 }
3962
3963 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3964 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3965                                        struct iwl_rx_mem_buffer *rxb)
3966 {
3967         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3968         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3969
3970         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3971                        scan_notif->scanned_channels,
3972                        scan_notif->tsf_low,
3973                        scan_notif->tsf_high, scan_notif->status);
3974
3975         /* The HW is no longer scanning */
3976         clear_bit(STATUS_SCAN_HW, &priv->status);
3977
3978         /* The scan completion notification came in, so kill that timer... */
3979         cancel_delayed_work(&priv->scan_check);
3980
3981         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3982                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3983                        jiffies_to_msecs(elapsed_jiffies
3984                                         (priv->scan_pass_start, jiffies)));
3985
3986         /* Remove this scanned band from the list
3987          * of pending bands to scan */
3988         priv->scan_bands--;
3989
3990         /* If a request to abort was given, or the scan did not succeed
3991          * then we reset the scan state machine and terminate,
3992          * re-queuing another scan if one has been requested */
3993         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3994                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3995                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3996         } else {
3997                 /* If there are more bands on this scan pass reschedule */
3998                 if (priv->scan_bands > 0)
3999                         goto reschedule;
4000         }
4001
4002         priv->last_scan_jiffies = jiffies;
4003         IWL_DEBUG_INFO("Setting scan to off\n");
4004
4005         clear_bit(STATUS_SCANNING, &priv->status);
4006
4007         IWL_DEBUG_INFO("Scan took %dms\n",
4008                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4009
4010         queue_work(priv->workqueue, &priv->scan_completed);
4011
4012         return;
4013
4014 reschedule:
4015         priv->scan_pass_start = jiffies;
4016         queue_work(priv->workqueue, &priv->request_scan);
4017 }
4018
4019 /* Handle notification from uCode that card's power state is changing
4020  * due to software, hardware, or critical temperature RFKILL */
4021 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
4022                                     struct iwl_rx_mem_buffer *rxb)
4023 {
4024         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4025         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4026         unsigned long status = priv->status;
4027
4028         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4029                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4030                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4031
4032         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4033                      RF_CARD_DISABLED)) {
4034
4035                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4036                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4037
4038                 if (!iwl_grab_restricted_access(priv)) {
4039                         iwl_write_restricted(
4040                                 priv, HBUS_TARG_MBX_C,
4041                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4042
4043                         iwl_release_restricted_access(priv);
4044                 }
4045
4046                 if (!(flags & RXON_CARD_DISABLED)) {
4047                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4048                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4049                         if (!iwl_grab_restricted_access(priv)) {
4050                                 iwl_write_restricted(
4051                                         priv, HBUS_TARG_MBX_C,
4052                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4053
4054                                 iwl_release_restricted_access(priv);
4055                         }
4056                 }
4057
4058                 if (flags & RF_CARD_DISABLED) {
4059                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4060                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4061                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
4062                         if (!iwl_grab_restricted_access(priv))
4063                                 iwl_release_restricted_access(priv);
4064                 }
4065         }
4066
4067         if (flags & HW_CARD_DISABLED)
4068                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4069         else
4070                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4071
4072
4073         if (flags & SW_CARD_DISABLED)
4074                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4075         else
4076                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4077
4078         if (!(flags & RXON_CARD_DISABLED))
4079                 iwl_scan_cancel(priv);
4080
4081         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4082              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4083             (test_bit(STATUS_RF_KILL_SW, &status) !=
4084              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4085                 queue_work(priv->workqueue, &priv->rf_kill);
4086         else
4087                 wake_up_interruptible(&priv->wait_command_queue);
4088 }
4089
4090 /**
4091  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
4092  *
4093  * Setup the RX handlers for each of the reply types sent from the uCode
4094  * to the host.
4095  *
4096  * This function chains into the hardware specific files for them to setup
4097  * any hardware specific handlers as well.
4098  */
4099 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
4100 {
4101         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
4102         priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
4103         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
4104         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
4105         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4106             iwl_rx_spectrum_measure_notif;
4107         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
4108         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4109             iwl_rx_pm_debug_statistics_notif;
4110         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
4111
4112         /* NOTE:  iwl_rx_statistics is different based on whether
4113          * the build is for the 3945 or the 4965.  See the
4114          * corresponding implementation in iwl-XXXX.c
4115          *
4116          * The same handler is used for both the REPLY to a
4117          * discrete statistics request from the host as well as
4118          * for the periodic statistics notification from the uCode
4119          */
4120         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
4121         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
4122
4123         priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
4124         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
4125         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4126             iwl_rx_scan_results_notif;
4127         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4128             iwl_rx_scan_complete_notif;
4129         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
4130         priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
4131
4132         /* Setup hardware specific Rx handlers */
4133         iwl_hw_rx_handler_setup(priv);
4134 }
4135
4136 /**
4137  * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4138  * @rxb: Rx buffer to reclaim
4139  *
4140  * If an Rx buffer has an async callback associated with it the callback
4141  * will be executed.  The attached skb (if present) will only be freed
4142  * if the callback returns 1
4143  */
4144 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
4145                                 struct iwl_rx_mem_buffer *rxb)
4146 {
4147         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
4148         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4149         int txq_id = SEQ_TO_QUEUE(sequence);
4150         int index = SEQ_TO_INDEX(sequence);
4151         int huge = sequence & SEQ_HUGE_FRAME;
4152         int cmd_index;
4153         struct iwl_cmd *cmd;
4154
4155         /* If a Tx command is being handled and it isn't in the actual
4156          * command queue then there a command routing bug has been introduced
4157          * in the queue management code. */
4158         if (txq_id != IWL_CMD_QUEUE_NUM)
4159                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4160                           txq_id, pkt->hdr.cmd);
4161         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4162
4163         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4164         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4165
4166         /* Input error checking is done when commands are added to queue. */
4167         if (cmd->meta.flags & CMD_WANT_SKB) {
4168                 cmd->meta.source->u.skb = rxb->skb;
4169                 rxb->skb = NULL;
4170         } else if (cmd->meta.u.callback &&
4171                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4172                 rxb->skb = NULL;
4173
4174         iwl_tx_queue_reclaim(priv, txq_id, index);
4175
4176         if (!(cmd->meta.flags & CMD_ASYNC)) {
4177                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4178                 wake_up_interruptible(&priv->wait_command_queue);
4179         }
4180 }
4181
4182 /************************** RX-FUNCTIONS ****************************/
4183 /*
4184  * Rx theory of operation
4185  *
4186  * The host allocates 32 DMA target addresses and passes the host address
4187  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
4188  * 0 to 31
4189  *
4190  * Rx Queue Indexes
4191  * The host/firmware share two index registers for managing the Rx buffers.
4192  *
4193  * The READ index maps to the first position that the firmware may be writing
4194  * to -- the driver can read up to (but not including) this position and get
4195  * good data.
4196  * The READ index is managed by the firmware once the card is enabled.
4197  *
4198  * The WRITE index maps to the last position the driver has read from -- the
4199  * position preceding WRITE is the last slot the firmware can place a packet.
4200  *
4201  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4202  * WRITE = READ.
4203  *
4204  * During initialization the host sets up the READ queue position to the first
4205  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4206  *
4207  * When the firmware places a packet in a buffer it will advance the READ index
4208  * and fire the RX interrupt.  The driver can then query the READ index and
4209  * process as many packets as possible, moving the WRITE index forward as it
4210  * resets the Rx queue buffers with new memory.
4211  *
4212  * The management in the driver is as follows:
4213  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4214  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4215  *   to replensish the iwl->rxq->rx_free.
4216  * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
4217  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4218  *   'processed' and 'read' driver indexes as well)
4219  * + A received packet is processed and handed to the kernel network stack,
4220  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4221  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4222  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4223  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4224  *   were enough free buffers and RX_STALLED is set it is cleared.
4225  *
4226  *
4227  * Driver sequence:
4228  *
4229  * iwl_rx_queue_alloc()       Allocates rx_free
4230  * iwl_rx_replenish()         Replenishes rx_free list from rx_used, and calls
4231  *                            iwl_rx_queue_restock
4232  * iwl_rx_queue_restock()     Moves available buffers from rx_free into Rx
4233  *                            queue, updates firmware pointers, and updates
4234  *                            the WRITE index.  If insufficient rx_free buffers
4235  *                            are available, schedules iwl_rx_replenish
4236  *
4237  * -- enable interrupts --
4238  * ISR - iwl_rx()             Detach iwl_rx_mem_buffers from pool up to the
4239  *                            READ INDEX, detaching the SKB from the pool.
4240  *                            Moves the packet buffer from queue to rx_used.
4241  *                            Calls iwl_rx_queue_restock to refill any empty
4242  *                            slots.
4243  * ...
4244  *
4245  */
4246
4247 /**
4248  * iwl_rx_queue_space - Return number of free slots available in queue.
4249  */
4250 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
4251 {
4252         int s = q->read - q->write;
4253         if (s <= 0)
4254                 s += RX_QUEUE_SIZE;
4255         /* keep some buffer to not confuse full and empty queue */
4256         s -= 2;
4257         if (s < 0)
4258                 s = 0;
4259         return s;
4260 }
4261
4262 /**
4263  * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4264  *
4265  * NOTE: This function has 3945 and 4965 specific code sections
4266  * but is declared in base due to the majority of the
4267  * implementation being the same (only a numeric constant is
4268  * different)
4269  *
4270  */
4271 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
4272 {
4273         u32 reg = 0;
4274         int rc = 0;
4275         unsigned long flags;
4276
4277         spin_lock_irqsave(&q->lock, flags);
4278
4279         if (q->need_update == 0)
4280                 goto exit_unlock;
4281
4282         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4283                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4284
4285                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4286                         iwl_set_bit(priv, CSR_GP_CNTRL,
4287                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4288                         goto exit_unlock;
4289                 }
4290
4291                 rc = iwl_grab_restricted_access(priv);
4292                 if (rc)
4293                         goto exit_unlock;
4294
4295                 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
4296                                      q->write & ~0x7);
4297                 iwl_release_restricted_access(priv);
4298         } else
4299                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4300
4301
4302         q->need_update = 0;
4303
4304  exit_unlock:
4305         spin_unlock_irqrestore(&q->lock, flags);
4306         return rc;
4307 }
4308
4309 /**
4310  * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
4311  *
4312  * NOTE: This function has 3945 and 4965 specific code paths in it.
4313  */
4314 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
4315                                           dma_addr_t dma_addr)
4316 {
4317         return cpu_to_le32((u32)(dma_addr >> 8));
4318 }
4319
4320
4321 /**
4322  * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4323  *
4324  * If there are slots in the RX queue that  need to be restocked,
4325  * and we have free pre-allocated buffers, fill the ranks as much
4326  * as we can pulling from rx_free.
4327  *
4328  * This moves the 'write' index forward to catch up with 'processed', and
4329  * also updates the memory address in the firmware to reference the new
4330  * target buffer.
4331  */
4332 int iwl_rx_queue_restock(struct iwl_priv *priv)
4333 {
4334         struct iwl_rx_queue *rxq = &priv->rxq;
4335         struct list_head *element;
4336         struct iwl_rx_mem_buffer *rxb;
4337         unsigned long flags;
4338         int write, rc;
4339
4340         spin_lock_irqsave(&rxq->lock, flags);
4341         write = rxq->write & ~0x7;
4342         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4343                 element = rxq->rx_free.next;
4344                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4345                 list_del(element);
4346                 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4347                 rxq->queue[rxq->write] = rxb;
4348                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4349                 rxq->free_count--;
4350         }
4351         spin_unlock_irqrestore(&rxq->lock, flags);
4352         /* If the pre-allocated buffer pool is dropping low, schedule to
4353          * refill it */
4354         if (rxq->free_count <= RX_LOW_WATERMARK)
4355                 queue_work(priv->workqueue, &priv->rx_replenish);
4356
4357
4358         /* If we've added more space for the firmware to place data, tell it */
4359         if ((write != (rxq->write & ~0x7))
4360             || (abs(rxq->write - rxq->read) > 7)) {
4361                 spin_lock_irqsave(&rxq->lock, flags);
4362                 rxq->need_update = 1;
4363                 spin_unlock_irqrestore(&rxq->lock, flags);
4364                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4365                 if (rc)
4366                         return rc;
4367         }
4368
4369         return 0;
4370 }
4371
4372 /**
4373  * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4374  *
4375  * When moving to rx_free an SKB is allocated for the slot.
4376  *
4377  * Also restock the Rx queue via iwl_rx_queue_restock.
4378  * This is called as a scheduled work item (except for during intialization)
4379  */
4380 void iwl_rx_replenish(void *data)
4381 {
4382         struct iwl_priv *priv = data;
4383         struct iwl_rx_queue *rxq = &priv->rxq;
4384         struct list_head *element;
4385         struct iwl_rx_mem_buffer *rxb;
4386         unsigned long flags;
4387         spin_lock_irqsave(&rxq->lock, flags);
4388         while (!list_empty(&rxq->rx_used)) {
4389                 element = rxq->rx_used.next;
4390                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4391                 rxb->skb =
4392                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4393                 if (!rxb->skb) {
4394                         if (net_ratelimit())
4395                                 printk(KERN_CRIT DRV_NAME
4396                                        ": Can not allocate SKB buffers\n");
4397                         /* We don't reschedule replenish work here -- we will
4398                          * call the restock method and if it still needs
4399                          * more buffers it will schedule replenish */
4400                         break;
4401                 }
4402                 priv->alloc_rxb_skb++;
4403                 list_del(element);
4404                 rxb->dma_addr =
4405                     pci_map_single(priv->pci_dev, rxb->skb->data,
4406                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4407                 list_add_tail(&rxb->list, &rxq->rx_free);
4408                 rxq->free_count++;
4409         }
4410         spin_unlock_irqrestore(&rxq->lock, flags);
4411
4412         spin_lock_irqsave(&priv->lock, flags);
4413         iwl_rx_queue_restock(priv);
4414         spin_unlock_irqrestore(&priv->lock, flags);
4415 }
4416
4417 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4418  * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4419  * This free routine walks the list of POOL entries and if SKB is set to
4420  * non NULL it is unmapped and freed
4421  */
4422 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4423 {
4424         int i;
4425         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4426                 if (rxq->pool[i].skb != NULL) {
4427                         pci_unmap_single(priv->pci_dev,
4428                                          rxq->pool[i].dma_addr,
4429                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4430                         dev_kfree_skb(rxq->pool[i].skb);
4431                 }
4432         }
4433
4434         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4435                             rxq->dma_addr);
4436         rxq->bd = NULL;
4437 }
4438
4439 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4440 {
4441         struct iwl_rx_queue *rxq = &priv->rxq;
4442         struct pci_dev *dev = priv->pci_dev;
4443         int i;
4444
4445         spin_lock_init(&rxq->lock);
4446         INIT_LIST_HEAD(&rxq->rx_free);
4447         INIT_LIST_HEAD(&rxq->rx_used);
4448         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4449         if (!rxq->bd)
4450                 return -ENOMEM;
4451         /* Fill the rx_used queue with _all_ of the Rx buffers */
4452         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4453                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4454         /* Set us so that we have processed and used all buffers, but have
4455          * not restocked the Rx queue with fresh buffers */
4456         rxq->read = rxq->write = 0;
4457         rxq->free_count = 0;
4458         rxq->need_update = 0;
4459         return 0;
4460 }
4461
4462 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4463 {
4464         unsigned long flags;
4465         int i;
4466         spin_lock_irqsave(&rxq->lock, flags);
4467         INIT_LIST_HEAD(&rxq->rx_free);
4468         INIT_LIST_HEAD(&rxq->rx_used);
4469         /* Fill the rx_used queue with _all_ of the Rx buffers */
4470         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4471                 /* In the reset function, these buffers may have been allocated
4472                  * to an SKB, so we need to unmap and free potential storage */
4473                 if (rxq->pool[i].skb != NULL) {
4474                         pci_unmap_single(priv->pci_dev,
4475                                          rxq->pool[i].dma_addr,
4476                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4477                         priv->alloc_rxb_skb--;
4478                         dev_kfree_skb(rxq->pool[i].skb);
4479                         rxq->pool[i].skb = NULL;
4480                 }
4481                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4482         }
4483
4484         /* Set us so that we have processed and used all buffers, but have
4485          * not restocked the Rx queue with fresh buffers */
4486         rxq->read = rxq->write = 0;
4487         rxq->free_count = 0;
4488         spin_unlock_irqrestore(&rxq->lock, flags);
4489 }
4490
4491 /* Convert linear signal-to-noise ratio into dB */
4492 static u8 ratio2dB[100] = {
4493 /*       0   1   2   3   4   5   6   7   8   9 */
4494          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4495         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4496         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4497         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4498         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4499         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4500         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4501         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4502         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4503         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4504 };
4505
4506 /* Calculates a relative dB value from a ratio of linear
4507  *   (i.e. not dB) signal levels.
4508  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4509 int iwl_calc_db_from_ratio(int sig_ratio)
4510 {
4511         /* Anything above 1000:1 just report as 60 dB */
4512         if (sig_ratio > 1000)
4513                 return 60;
4514
4515         /* Above 100:1, divide by 10 and use table,
4516          *   add 20 dB to make up for divide by 10 */
4517         if (sig_ratio > 100)
4518                 return (20 + (int)ratio2dB[sig_ratio/10]);
4519
4520         /* We shouldn't see this */
4521         if (sig_ratio < 1)
4522                 return 0;
4523
4524         /* Use table for ratios 1:1 - 99:1 */
4525         return (int)ratio2dB[sig_ratio];
4526 }
4527
4528 #define PERFECT_RSSI (-20) /* dBm */
4529 #define WORST_RSSI (-95)   /* dBm */
4530 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4531
4532 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4533  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4534  *   about formulas used below. */
4535 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4536 {
4537         int sig_qual;
4538         int degradation = PERFECT_RSSI - rssi_dbm;
4539
4540         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4541          * as indicator; formula is (signal dbm - noise dbm).
4542          * SNR at or above 40 is a great signal (100%).
4543          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4544          * Weakest usable signal is usually 10 - 15 dB SNR. */
4545         if (noise_dbm) {
4546                 if (rssi_dbm - noise_dbm >= 40)
4547                         return 100;
4548                 else if (rssi_dbm < noise_dbm)
4549                         return 0;
4550                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4551
4552         /* Else use just the signal level.
4553          * This formula is a least squares fit of data points collected and
4554          *   compared with a reference system that had a percentage (%) display
4555          *   for signal quality. */
4556         } else
4557                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4558                             (15 * RSSI_RANGE + 62 * degradation)) /
4559                            (RSSI_RANGE * RSSI_RANGE);
4560
4561         if (sig_qual > 100)
4562                 sig_qual = 100;
4563         else if (sig_qual < 1)
4564                 sig_qual = 0;
4565
4566         return sig_qual;
4567 }
4568
4569 /**
4570  * iwl_rx_handle - Main entry function for receiving responses from the uCode
4571  *
4572  * Uses the priv->rx_handlers callback function array to invoke
4573  * the appropriate handlers, including command responses,
4574  * frame-received notifications, and other notifications.
4575  */
4576 static void iwl_rx_handle(struct iwl_priv *priv)
4577 {
4578         struct iwl_rx_mem_buffer *rxb;
4579         struct iwl_rx_packet *pkt;
4580         struct iwl_rx_queue *rxq = &priv->rxq;
4581         u32 r, i;
4582         int reclaim;
4583         unsigned long flags;
4584
4585         r = iwl_hw_get_rx_read(priv);
4586         i = rxq->read;
4587
4588         /* Rx interrupt, but nothing sent from uCode */
4589         if (i == r)
4590                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4591
4592         while (i != r) {
4593                 rxb = rxq->queue[i];
4594
4595                 /* If an RXB doesn't have a queue slot associated with it
4596                  * then a bug has been introduced in the queue refilling
4597                  * routines -- catch it here */
4598                 BUG_ON(rxb == NULL);
4599
4600                 rxq->queue[i] = NULL;
4601
4602                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4603                                             IWL_RX_BUF_SIZE,
4604                                             PCI_DMA_FROMDEVICE);
4605                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4606
4607                 /* Reclaim a command buffer only if this packet is a response
4608                  *   to a (driver-originated) command.
4609                  * If the packet (e.g. Rx frame) originated from uCode,
4610                  *   there is no command buffer to reclaim.
4611                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4612                  *   but apparently a few don't get set; catch them here. */
4613                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4614                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4615                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4616                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4617                         (pkt->hdr.cmd != REPLY_TX);
4618
4619                 /* Based on type of command response or notification,
4620                  *   handle those that need handling via function in
4621                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
4622                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4623                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4624                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4625                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4626                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4627                 } else {
4628                         /* No handling needed */
4629                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4630                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4631                                 r, i, get_cmd_string(pkt->hdr.cmd),
4632                                 pkt->hdr.cmd);
4633                 }
4634
4635                 if (reclaim) {
4636                         /* Invoke any callbacks, transfer the skb to caller,
4637                          * and fire off the (possibly) blocking iwl_send_cmd()
4638                          * as we reclaim the driver command queue */
4639                         if (rxb && rxb->skb)
4640                                 iwl_tx_cmd_complete(priv, rxb);
4641                         else
4642                                 IWL_WARNING("Claim null rxb?\n");
4643                 }
4644
4645                 /* For now we just don't re-use anything.  We can tweak this
4646                  * later to try and re-use notification packets and SKBs that
4647                  * fail to Rx correctly */
4648                 if (rxb->skb != NULL) {
4649                         priv->alloc_rxb_skb--;
4650                         dev_kfree_skb_any(rxb->skb);
4651                         rxb->skb = NULL;
4652                 }
4653
4654                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4655                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4656                 spin_lock_irqsave(&rxq->lock, flags);
4657                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4658                 spin_unlock_irqrestore(&rxq->lock, flags);
4659                 i = (i + 1) & RX_QUEUE_MASK;
4660         }
4661
4662         /* Backtrack one entry */
4663         priv->rxq.read = i;
4664         iwl_rx_queue_restock(priv);
4665 }
4666
4667 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4668                                   struct iwl_tx_queue *txq)
4669 {
4670         u32 reg = 0;
4671         int rc = 0;
4672         int txq_id = txq->q.id;
4673
4674         if (txq->need_update == 0)
4675                 return rc;
4676
4677         /* if we're trying to save power */
4678         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4679                 /* wake up nic if it's powered down ...
4680                  * uCode will wake up, and interrupt us again, so next
4681                  * time we'll skip this part. */
4682                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4683
4684                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4685                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4686                         iwl_set_bit(priv, CSR_GP_CNTRL,
4687                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4688                         return rc;
4689                 }
4690
4691                 /* restore this queue's parameters in nic hardware. */
4692                 rc = iwl_grab_restricted_access(priv);
4693                 if (rc)
4694                         return rc;
4695                 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4696                                      txq->q.first_empty | (txq_id << 8));
4697                 iwl_release_restricted_access(priv);
4698
4699         /* else not in power-save mode, uCode will never sleep when we're
4700          * trying to tx (during RFKILL, we're not trying to tx). */
4701         } else
4702                 iwl_write32(priv, HBUS_TARG_WRPTR,
4703                             txq->q.first_empty | (txq_id << 8));
4704
4705         txq->need_update = 0;
4706
4707         return rc;
4708 }
4709
4710 #ifdef CONFIG_IWLWIFI_DEBUG
4711 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4712 {
4713         DECLARE_MAC_BUF(mac);
4714
4715         IWL_DEBUG_RADIO("RX CONFIG:\n");
4716         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4717         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4718         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4719         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4720                         le32_to_cpu(rxon->filter_flags));
4721         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4722         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4723                         rxon->ofdm_basic_rates);
4724         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4725         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4726                         print_mac(mac, rxon->node_addr));
4727         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4728                         print_mac(mac, rxon->bssid_addr));
4729         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4730 }
4731 #endif
4732
4733 static void iwl_enable_interrupts(struct iwl_priv *priv)
4734 {
4735         IWL_DEBUG_ISR("Enabling interrupts\n");
4736         set_bit(STATUS_INT_ENABLED, &priv->status);
4737         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4738 }
4739
4740 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4741 {
4742         clear_bit(STATUS_INT_ENABLED, &priv->status);
4743
4744         /* disable interrupts from uCode/NIC to host */
4745         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4746
4747         /* acknowledge/clear/reset any interrupts still pending
4748          * from uCode or flow handler (Rx/Tx DMA) */
4749         iwl_write32(priv, CSR_INT, 0xffffffff);
4750         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4751         IWL_DEBUG_ISR("Disabled interrupts\n");
4752 }
4753
4754 static const char *desc_lookup(int i)
4755 {
4756         switch (i) {
4757         case 1:
4758                 return "FAIL";
4759         case 2:
4760                 return "BAD_PARAM";
4761         case 3:
4762                 return "BAD_CHECKSUM";
4763         case 4:
4764                 return "NMI_INTERRUPT";
4765         case 5:
4766                 return "SYSASSERT";
4767         case 6:
4768                 return "FATAL_ERROR";
4769         }
4770
4771         return "UNKNOWN";
4772 }
4773
4774 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4775 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4776
4777 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4778 {
4779         u32 data2, line;
4780         u32 desc, time, count, base, data1;
4781         u32 blink1, blink2, ilink1, ilink2;
4782         int rc;
4783
4784         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4785
4786         if (!iwl_hw_valid_rtc_data_addr(base)) {
4787                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4788                 return;
4789         }
4790
4791         rc = iwl_grab_restricted_access(priv);
4792         if (rc) {
4793                 IWL_WARNING("Can not read from adapter at this time.\n");
4794                 return;
4795         }
4796
4797         count = iwl_read_restricted_mem(priv, base);
4798
4799         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4800                 IWL_ERROR("Start IWL Error Log Dump:\n");
4801                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4802                           priv->status, priv->config, count);
4803         }
4804
4805         desc = iwl_read_restricted_mem(priv, base + 1 * sizeof(u32));
4806         blink1 = iwl_read_restricted_mem(priv, base + 3 * sizeof(u32));
4807         blink2 = iwl_read_restricted_mem(priv, base + 4 * sizeof(u32));
4808         ilink1 = iwl_read_restricted_mem(priv, base + 5 * sizeof(u32));
4809         ilink2 = iwl_read_restricted_mem(priv, base + 6 * sizeof(u32));
4810         data1 = iwl_read_restricted_mem(priv, base + 7 * sizeof(u32));
4811         data2 = iwl_read_restricted_mem(priv, base + 8 * sizeof(u32));
4812         line = iwl_read_restricted_mem(priv, base + 9 * sizeof(u32));
4813         time = iwl_read_restricted_mem(priv, base + 11 * sizeof(u32));
4814
4815         IWL_ERROR("Desc               Time       "
4816                   "data1      data2      line\n");
4817         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4818                   desc_lookup(desc), desc, time, data1, data2, line);
4819         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4820         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4821                   ilink1, ilink2);
4822
4823         iwl_release_restricted_access(priv);
4824 }
4825
4826 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4827
4828 /**
4829  * iwl_print_event_log - Dump error event log to syslog
4830  *
4831  * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4832  */
4833 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4834                                 u32 num_events, u32 mode)
4835 {
4836         u32 i;
4837         u32 base;       /* SRAM byte address of event log header */
4838         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4839         u32 ptr;        /* SRAM byte address of log data */
4840         u32 ev, time, data; /* event log data */
4841
4842         if (num_events == 0)
4843                 return;
4844
4845         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4846
4847         if (mode == 0)
4848                 event_size = 2 * sizeof(u32);
4849         else
4850                 event_size = 3 * sizeof(u32);
4851
4852         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4853
4854         /* "time" is actually "data" for mode 0 (no timestamp).
4855          * place event id # at far right for easier visual parsing. */
4856         for (i = 0; i < num_events; i++) {
4857                 ev = iwl_read_restricted_mem(priv, ptr);
4858                 ptr += sizeof(u32);
4859                 time = iwl_read_restricted_mem(priv, ptr);
4860                 ptr += sizeof(u32);
4861                 if (mode == 0)
4862                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4863                 else {
4864                         data = iwl_read_restricted_mem(priv, ptr);
4865                         ptr += sizeof(u32);
4866                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4867                 }
4868         }
4869 }
4870
4871 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4872 {
4873         int rc;
4874         u32 base;       /* SRAM byte address of event log header */
4875         u32 capacity;   /* event log capacity in # entries */
4876         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4877         u32 num_wraps;  /* # times uCode wrapped to top of log */
4878         u32 next_entry; /* index of next entry to be written by uCode */
4879         u32 size;       /* # entries that we'll print */
4880
4881         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4882         if (!iwl_hw_valid_rtc_data_addr(base)) {
4883                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4884                 return;
4885         }
4886
4887         rc = iwl_grab_restricted_access(priv);
4888         if (rc) {
4889                 IWL_WARNING("Can not read from adapter at this time.\n");
4890                 return;
4891         }
4892
4893         /* event log header */
4894         capacity = iwl_read_restricted_mem(priv, base);
4895         mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4896         num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4897         next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4898
4899         size = num_wraps ? capacity : next_entry;
4900
4901         /* bail out if nothing in log */
4902         if (size == 0) {
4903                 IWL_ERROR("Start IPW Event Log Dump: nothing in log\n");
4904                 iwl_release_restricted_access(priv);
4905                 return;
4906         }
4907
4908         IWL_ERROR("Start IPW Event Log Dump: display count %d, wraps %d\n",
4909                   size, num_wraps);
4910
4911         /* if uCode has wrapped back to top of log, start at the oldest entry,
4912          * i.e the next one that uCode would fill. */
4913         if (num_wraps)
4914                 iwl_print_event_log(priv, next_entry,
4915                                     capacity - next_entry, mode);
4916
4917         /* (then/else) start at top of log */
4918         iwl_print_event_log(priv, 0, next_entry, mode);
4919
4920         iwl_release_restricted_access(priv);
4921 }
4922
4923 /**
4924  * iwl_irq_handle_error - called for HW or SW error interrupt from card
4925  */
4926 static void iwl_irq_handle_error(struct iwl_priv *priv)
4927 {
4928         /* Set the FW error flag -- cleared on iwl_down */
4929         set_bit(STATUS_FW_ERROR, &priv->status);
4930
4931         /* Cancel currently queued command. */
4932         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4933
4934 #ifdef CONFIG_IWLWIFI_DEBUG
4935         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4936                 iwl_dump_nic_error_log(priv);
4937                 iwl_dump_nic_event_log(priv);
4938                 iwl_print_rx_config_cmd(&priv->staging_rxon);
4939         }
4940 #endif
4941
4942         wake_up_interruptible(&priv->wait_command_queue);
4943
4944         /* Keep the restart process from trying to send host
4945          * commands by clearing the INIT status bit */
4946         clear_bit(STATUS_READY, &priv->status);
4947
4948         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4949                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4950                           "Restarting adapter due to uCode error.\n");
4951
4952                 if (iwl_is_associated(priv)) {
4953                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4954                                sizeof(priv->recovery_rxon));
4955                         priv->error_recovering = 1;
4956                 }
4957                 queue_work(priv->workqueue, &priv->restart);
4958         }
4959 }
4960
4961 static void iwl_error_recovery(struct iwl_priv *priv)
4962 {
4963         unsigned long flags;
4964
4965         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4966                sizeof(priv->staging_rxon));
4967         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4968         iwl_commit_rxon(priv);
4969
4970         iwl_rxon_add_station(priv, priv->bssid, 1);
4971
4972         spin_lock_irqsave(&priv->lock, flags);
4973         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4974         priv->error_recovering = 0;
4975         spin_unlock_irqrestore(&priv->lock, flags);
4976 }
4977
4978 static void iwl_irq_tasklet(struct iwl_priv *priv)
4979 {
4980         u32 inta, handled = 0;
4981         u32 inta_fh;
4982         unsigned long flags;
4983 #ifdef CONFIG_IWLWIFI_DEBUG
4984         u32 inta_mask;
4985 #endif
4986
4987         spin_lock_irqsave(&priv->lock, flags);
4988
4989         /* Ack/clear/reset pending uCode interrupts.
4990          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4991          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4992         inta = iwl_read32(priv, CSR_INT);
4993         iwl_write32(priv, CSR_INT, inta);
4994
4995         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4996          * Any new interrupts that happen after this, either while we're
4997          * in this tasklet, or later, will show up in next ISR/tasklet. */
4998         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4999         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
5000
5001 #ifdef CONFIG_IWLWIFI_DEBUG
5002         if (iwl_debug_level & IWL_DL_ISR) {
5003                 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5004                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5005                               inta, inta_mask, inta_fh);
5006         }
5007 #endif
5008
5009         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5010          * atomic, make sure that inta covers all the interrupts that
5011          * we've discovered, even if FH interrupt came in just after
5012          * reading CSR_INT. */
5013         if (inta_fh & CSR_FH_INT_RX_MASK)
5014                 inta |= CSR_INT_BIT_FH_RX;
5015         if (inta_fh & CSR_FH_INT_TX_MASK)
5016                 inta |= CSR_INT_BIT_FH_TX;
5017
5018         /* Now service all interrupt bits discovered above. */
5019         if (inta & CSR_INT_BIT_HW_ERR) {
5020                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5021
5022                 /* Tell the device to stop sending interrupts */
5023                 iwl_disable_interrupts(priv);
5024
5025                 iwl_irq_handle_error(priv);
5026
5027                 handled |= CSR_INT_BIT_HW_ERR;
5028
5029                 spin_unlock_irqrestore(&priv->lock, flags);
5030
5031                 return;
5032         }
5033
5034 #ifdef CONFIG_IWLWIFI_DEBUG
5035         if (iwl_debug_level & (IWL_DL_ISR)) {
5036                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5037                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5038                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
5039
5040                 /* Alive notification via Rx interrupt will do the real work */
5041                 if (inta & CSR_INT_BIT_ALIVE)
5042                         IWL_DEBUG_ISR("Alive interrupt\n");
5043         }
5044 #endif
5045         /* Safely ignore these bits for debug checks below */
5046         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5047
5048         /* HW RF KILL switch toggled (4965 only) */
5049         if (inta & CSR_INT_BIT_RF_KILL) {
5050                 int hw_rf_kill = 0;
5051                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
5052                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5053                         hw_rf_kill = 1;
5054
5055                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5056                                 "RF_KILL bit toggled to %s.\n",
5057                                 hw_rf_kill ? "disable radio":"enable radio");
5058
5059                 /* Queue restart only if RF_KILL switch was set to "kill"
5060                  *   when we loaded driver, and is now set to "enable".
5061                  * After we're Alive, RF_KILL gets handled by
5062                  *   iwl_rx_card_state_notif() */
5063                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
5064                         queue_work(priv->workqueue, &priv->restart);
5065
5066                 handled |= CSR_INT_BIT_RF_KILL;
5067         }
5068
5069         /* Chip got too hot and stopped itself (4965 only) */
5070         if (inta & CSR_INT_BIT_CT_KILL) {
5071                 IWL_ERROR("Microcode CT kill error detected.\n");
5072                 handled |= CSR_INT_BIT_CT_KILL;
5073         }
5074
5075         /* Error detected by uCode */
5076         if (inta & CSR_INT_BIT_SW_ERR) {
5077                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5078                           inta);
5079                 iwl_irq_handle_error(priv);
5080                 handled |= CSR_INT_BIT_SW_ERR;
5081         }
5082
5083         /* uCode wakes up after power-down sleep */
5084         if (inta & CSR_INT_BIT_WAKEUP) {
5085                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5086                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
5087                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5088                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5089                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5090                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5091                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5092                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5093
5094                 handled |= CSR_INT_BIT_WAKEUP;
5095         }
5096
5097         /* All uCode command responses, including Tx command responses,
5098          * Rx "responses" (frame-received notification), and other
5099          * notifications from uCode come through here*/
5100         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5101                 iwl_rx_handle(priv);
5102                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5103         }
5104
5105         if (inta & CSR_INT_BIT_FH_TX) {
5106                 IWL_DEBUG_ISR("Tx interrupt\n");
5107                 handled |= CSR_INT_BIT_FH_TX;
5108         }
5109
5110         if (inta & ~handled)
5111                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5112
5113         if (inta & ~CSR_INI_SET_MASK) {
5114                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5115                          inta & ~CSR_INI_SET_MASK);
5116                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5117         }
5118
5119         /* Re-enable all interrupts */
5120         iwl_enable_interrupts(priv);
5121
5122 #ifdef CONFIG_IWLWIFI_DEBUG
5123         if (iwl_debug_level & (IWL_DL_ISR)) {
5124                 inta = iwl_read32(priv, CSR_INT);
5125                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
5126                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5127                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5128                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5129         }
5130 #endif
5131         spin_unlock_irqrestore(&priv->lock, flags);
5132 }
5133
5134 static irqreturn_t iwl_isr(int irq, void *data)
5135 {
5136         struct iwl_priv *priv = data;
5137         u32 inta, inta_mask;
5138         u32 inta_fh;
5139         if (!priv)
5140                 return IRQ_NONE;
5141
5142         spin_lock(&priv->lock);
5143
5144         /* Disable (but don't clear!) interrupts here to avoid
5145          *    back-to-back ISRs and sporadic interrupts from our NIC.
5146          * If we have something to service, the tasklet will re-enable ints.
5147          * If we *don't* have something, we'll re-enable before leaving here. */
5148         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
5149         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
5150
5151         /* Discover which interrupts are active/pending */
5152         inta = iwl_read32(priv, CSR_INT);
5153         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5154
5155         /* Ignore interrupt if there's nothing in NIC to service.
5156          * This may be due to IRQ shared with another device,
5157          * or due to sporadic interrupts thrown from our NIC. */
5158         if (!inta && !inta_fh) {
5159                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5160                 goto none;
5161         }
5162
5163         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5164                 /* Hardware disappeared */
5165                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5166                 goto none;
5167         }
5168
5169         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5170                       inta, inta_mask, inta_fh);
5171
5172         /* iwl_irq_tasklet() will service interrupts and re-enable them */
5173         tasklet_schedule(&priv->irq_tasklet);
5174         spin_unlock(&priv->lock);
5175
5176         return IRQ_HANDLED;
5177
5178  none:
5179         /* re-enable interrupts here since we don't have anything to service. */
5180         iwl_enable_interrupts(priv);
5181         spin_unlock(&priv->lock);
5182         return IRQ_NONE;
5183 }
5184
5185 /************************** EEPROM BANDS ****************************
5186  *
5187  * The iwl_eeprom_band definitions below provide the mapping from the
5188  * EEPROM contents to the specific channel number supported for each
5189  * band.
5190  *
5191  * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
5192  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5193  * The specific geography and calibration information for that channel
5194  * is contained in the eeprom map itself.
5195  *
5196  * During init, we copy the eeprom information and channel map
5197  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5198  *
5199  * channel_map_24/52 provides the index in the channel_info array for a
5200  * given channel.  We have to have two separate maps as there is channel
5201  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5202  * band_2
5203  *
5204  * A value of 0xff stored in the channel_map indicates that the channel
5205  * is not supported by the hardware at all.
5206  *
5207  * A value of 0xfe in the channel_map indicates that the channel is not
5208  * valid for Tx with the current hardware.  This means that
5209  * while the system can tune and receive on a given channel, it may not
5210  * be able to associate or transmit any frames on that
5211  * channel.  There is no corresponding channel information for that
5212  * entry.
5213  *
5214  *********************************************************************/
5215
5216 /* 2.4 GHz */
5217 static const u8 iwl_eeprom_band_1[14] = {
5218         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5219 };
5220
5221 /* 5.2 GHz bands */
5222 static const u8 iwl_eeprom_band_2[] = {
5223         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5224 };
5225
5226 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
5227         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5228 };
5229
5230 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
5231         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5232 };
5233
5234 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
5235         145, 149, 153, 157, 161, 165
5236 };
5237
5238 static u8 iwl_eeprom_band_6[] = {       /* 2.4 FAT channel */
5239         1, 2, 3, 4, 5, 6, 7
5240 };
5241
5242 static u8 iwl_eeprom_band_7[] = {       /* 5.2 FAT channel */
5243         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5244 };
5245
5246 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
5247                                     int *eeprom_ch_count,
5248                                     const struct iwl_eeprom_channel
5249                                     **eeprom_ch_info,
5250                                     const u8 **eeprom_ch_index)
5251 {
5252         switch (band) {
5253         case 1:         /* 2.4GHz band */
5254                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
5255                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5256                 *eeprom_ch_index = iwl_eeprom_band_1;
5257                 break;
5258         case 2:         /* 5.2GHz band */
5259                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
5260                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5261                 *eeprom_ch_index = iwl_eeprom_band_2;
5262                 break;
5263         case 3:         /* 5.2GHz band */
5264                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
5265                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5266                 *eeprom_ch_index = iwl_eeprom_band_3;
5267                 break;
5268         case 4:         /* 5.2GHz band */
5269                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
5270                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5271                 *eeprom_ch_index = iwl_eeprom_band_4;
5272                 break;
5273         case 5:         /* 5.2GHz band */
5274                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
5275                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5276                 *eeprom_ch_index = iwl_eeprom_band_5;
5277                 break;
5278         case 6:
5279                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
5280                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5281                 *eeprom_ch_index = iwl_eeprom_band_6;
5282                 break;
5283         case 7:
5284                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
5285                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5286                 *eeprom_ch_index = iwl_eeprom_band_7;
5287                 break;
5288         default:
5289                 BUG();
5290                 return;
5291         }
5292 }
5293
5294 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
5295                                                     int phymode, u16 channel)
5296 {
5297         int i;
5298
5299         switch (phymode) {
5300         case MODE_IEEE80211A:
5301                 for (i = 14; i < priv->channel_count; i++) {
5302                         if (priv->channel_info[i].channel == channel)
5303                                 return &priv->channel_info[i];
5304                 }
5305                 break;
5306
5307         case MODE_IEEE80211B:
5308         case MODE_IEEE80211G:
5309                 if (channel >= 1 && channel <= 14)
5310                         return &priv->channel_info[channel - 1];
5311                 break;
5312
5313         }
5314
5315         return NULL;
5316 }
5317
5318 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5319                             ? # x " " : "")
5320
5321 static int iwl_init_channel_map(struct iwl_priv *priv)
5322 {
5323         int eeprom_ch_count = 0;
5324         const u8 *eeprom_ch_index = NULL;
5325         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5326         int band, ch;
5327         struct iwl_channel_info *ch_info;
5328
5329         if (priv->channel_count) {
5330                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5331                 return 0;
5332         }
5333
5334         if (priv->eeprom.version < 0x2f) {
5335                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5336                             priv->eeprom.version);
5337                 return -EINVAL;
5338         }
5339
5340         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5341
5342         priv->channel_count =
5343             ARRAY_SIZE(iwl_eeprom_band_1) +
5344             ARRAY_SIZE(iwl_eeprom_band_2) +
5345             ARRAY_SIZE(iwl_eeprom_band_3) +
5346             ARRAY_SIZE(iwl_eeprom_band_4) +
5347             ARRAY_SIZE(iwl_eeprom_band_5);
5348
5349         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5350
5351         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5352                                      priv->channel_count, GFP_KERNEL);
5353         if (!priv->channel_info) {
5354                 IWL_ERROR("Could not allocate channel_info\n");
5355                 priv->channel_count = 0;
5356                 return -ENOMEM;
5357         }
5358
5359         ch_info = priv->channel_info;
5360
5361         /* Loop through the 5 EEPROM bands adding them in order to the
5362          * channel map we maintain (that contains additional information than
5363          * what just in the EEPROM) */
5364         for (band = 1; band <= 5; band++) {
5365
5366                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5367                                         &eeprom_ch_info, &eeprom_ch_index);
5368
5369                 /* Loop through each band adding each of the channels */
5370                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5371                         ch_info->channel = eeprom_ch_index[ch];
5372                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5373                             MODE_IEEE80211A;
5374
5375                         /* permanently store EEPROM's channel regulatory flags
5376                          *   and max power in channel info database. */
5377                         ch_info->eeprom = eeprom_ch_info[ch];
5378
5379                         /* Copy the run-time flags so they are there even on
5380                          * invalid channels */
5381                         ch_info->flags = eeprom_ch_info[ch].flags;
5382
5383                         if (!(is_channel_valid(ch_info))) {
5384                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5385                                                "No traffic\n",
5386                                                ch_info->channel,
5387                                                ch_info->flags,
5388                                                is_channel_a_band(ch_info) ?
5389                                                "5.2" : "2.4");
5390                                 ch_info++;
5391                                 continue;
5392                         }
5393
5394                         /* Initialize regulatory-based run-time data */
5395                         ch_info->max_power_avg = ch_info->curr_txpow =
5396                             eeprom_ch_info[ch].max_power_avg;
5397                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5398                         ch_info->min_power = 0;
5399
5400                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5401                                        " %ddBm): Ad-Hoc %ssupported\n",
5402                                        ch_info->channel,
5403                                        is_channel_a_band(ch_info) ?
5404                                        "5.2" : "2.4",
5405                                        CHECK_AND_PRINT(IBSS),
5406                                        CHECK_AND_PRINT(ACTIVE),
5407                                        CHECK_AND_PRINT(RADAR),
5408                                        CHECK_AND_PRINT(WIDE),
5409                                        CHECK_AND_PRINT(NARROW),
5410                                        CHECK_AND_PRINT(DFS),
5411                                        eeprom_ch_info[ch].flags,
5412                                        eeprom_ch_info[ch].max_power_avg,
5413                                        ((eeprom_ch_info[ch].
5414                                          flags & EEPROM_CHANNEL_IBSS)
5415                                         && !(eeprom_ch_info[ch].
5416                                              flags & EEPROM_CHANNEL_RADAR))
5417                                        ? "" : "not ");
5418
5419                         /* Set the user_txpower_limit to the highest power
5420                          * supported by any channel */
5421                         if (eeprom_ch_info[ch].max_power_avg >
5422                             priv->user_txpower_limit)
5423                                 priv->user_txpower_limit =
5424                                     eeprom_ch_info[ch].max_power_avg;
5425
5426                         ch_info++;
5427                 }
5428         }
5429
5430         for (band = 6; band <= 7; band++) {
5431                 int phymode;
5432                 u8 fat_extension_chan;
5433
5434                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5435                                         &eeprom_ch_info, &eeprom_ch_index);
5436
5437                 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5438                 /* Loop through each band adding each of the channels */
5439                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5440
5441                         if ((band == 6) &&
5442                             ((eeprom_ch_index[ch] == 5) ||
5443                             (eeprom_ch_index[ch] == 6) ||
5444                             (eeprom_ch_index[ch] == 7)))
5445                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5446                         else
5447                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5448
5449                         iwl4965_set_fat_chan_info(priv, phymode,
5450                                                   eeprom_ch_index[ch],
5451                                                   &(eeprom_ch_info[ch]),
5452                                                   fat_extension_chan);
5453
5454                         iwl4965_set_fat_chan_info(priv, phymode,
5455                                                   (eeprom_ch_index[ch] + 4),
5456                                                   &(eeprom_ch_info[ch]),
5457                                                   HT_IE_EXT_CHANNEL_BELOW);
5458                 }
5459         }
5460
5461         return 0;
5462 }
5463
5464 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5465  * sending probe req.  This should be set long enough to hear probe responses
5466  * from more than one AP.  */
5467 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5468 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5469
5470 /* For faster active scanning, scan will move to the next channel if fewer than
5471  * PLCP_QUIET_THRESH packets are heard on this channel within
5472  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5473  * time if it's a quiet channel (nothing responded to our probe, and there's
5474  * no other traffic).
5475  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5476 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5477 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5478
5479 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5480  * Must be set longer than active dwell time.
5481  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5482 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5483 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5484 #define IWL_PASSIVE_DWELL_BASE      (100)
5485 #define IWL_CHANNEL_TUNE_TIME       5
5486
5487 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5488 {
5489         if (phymode == MODE_IEEE80211A)
5490                 return IWL_ACTIVE_DWELL_TIME_52;
5491         else
5492                 return IWL_ACTIVE_DWELL_TIME_24;
5493 }
5494
5495 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5496 {
5497         u16 active = iwl_get_active_dwell_time(priv, phymode);
5498         u16 passive = (phymode != MODE_IEEE80211A) ?
5499             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5500             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5501
5502         if (iwl_is_associated(priv)) {
5503                 /* If we're associated, we clamp the maximum passive
5504                  * dwell time to be 98% of the beacon interval (minus
5505                  * 2 * channel tune time) */
5506                 passive = priv->beacon_int;
5507                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5508                         passive = IWL_PASSIVE_DWELL_BASE;
5509                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5510         }
5511
5512         if (passive <= active)
5513                 passive = active + 1;
5514
5515         return passive;
5516 }
5517
5518 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5519                                      u8 is_active, u8 direct_mask,
5520                                      struct iwl_scan_channel *scan_ch)
5521 {
5522         const struct ieee80211_channel *channels = NULL;
5523         const struct ieee80211_hw_mode *hw_mode;
5524         const struct iwl_channel_info *ch_info;
5525         u16 passive_dwell = 0;
5526         u16 active_dwell = 0;
5527         int added, i;
5528
5529         hw_mode = iwl_get_hw_mode(priv, phymode);
5530         if (!hw_mode)
5531                 return 0;
5532
5533         channels = hw_mode->channels;
5534
5535         active_dwell = iwl_get_active_dwell_time(priv, phymode);
5536         passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5537
5538         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5539                 if (channels[i].chan ==
5540                     le16_to_cpu(priv->active_rxon.channel)) {
5541                         if (iwl_is_associated(priv)) {
5542                                 IWL_DEBUG_SCAN
5543                                     ("Skipping current channel %d\n",
5544                                      le16_to_cpu(priv->active_rxon.channel));
5545                                 continue;
5546                         }
5547                 } else if (priv->only_active_channel)
5548                         continue;
5549
5550                 scan_ch->channel = channels[i].chan;
5551
5552                 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5553                 if (!is_channel_valid(ch_info)) {
5554                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5555                                        scan_ch->channel);
5556                         continue;
5557                 }
5558
5559                 if (!is_active || is_channel_passive(ch_info) ||
5560                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5561                         scan_ch->type = 0;      /* passive */
5562                 else
5563                         scan_ch->type = 1;      /* active */
5564
5565                 if (scan_ch->type & 1)
5566                         scan_ch->type |= (direct_mask << 1);
5567
5568                 if (is_channel_narrow(ch_info))
5569                         scan_ch->type |= (1 << 7);
5570
5571                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5572                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5573
5574                 /* Set power levels to defaults */
5575                 scan_ch->tpc.dsp_atten = 110;
5576                 /* scan_pwr_info->tpc.dsp_atten; */
5577
5578                 /*scan_pwr_info->tpc.tx_gain; */
5579                 if (phymode == MODE_IEEE80211A)
5580                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5581                 else {
5582                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5583                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5584                          * power level
5585                          scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5586                          */
5587                 }
5588
5589                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5590                                scan_ch->channel,
5591                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5592                                (scan_ch->type & 1) ?
5593                                active_dwell : passive_dwell);
5594
5595                 scan_ch++;
5596                 added++;
5597         }
5598
5599         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5600         return added;
5601 }
5602
5603 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5604 {
5605         int i, j;
5606         for (i = 0; i < 3; i++) {
5607                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5608                 for (j = 0; j < hw_mode->num_channels; j++)
5609                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5610         }
5611 }
5612
5613 static void iwl_init_hw_rates(struct iwl_priv *priv,
5614                               struct ieee80211_rate *rates)
5615 {
5616         int i;
5617
5618         for (i = 0; i < IWL_RATE_COUNT; i++) {
5619                 rates[i].rate = iwl_rates[i].ieee * 5;
5620                 rates[i].val = i; /* Rate scaling will work on indexes */
5621                 rates[i].val2 = i;
5622                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5623                 /* Only OFDM have the bits-per-symbol set */
5624                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5625                         rates[i].flags |= IEEE80211_RATE_OFDM;
5626                 else {
5627                         /*
5628                          * If CCK 1M then set rate flag to CCK else CCK_2
5629                          * which is CCK | PREAMBLE2
5630                          */
5631                         rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5632                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5633                 }
5634
5635                 /* Set up which ones are basic rates... */
5636                 if (IWL_BASIC_RATES_MASK & (1 << i))
5637                         rates[i].flags |= IEEE80211_RATE_BASIC;
5638         }
5639
5640         iwl4965_init_hw_rates(priv, rates);
5641 }
5642
5643 /**
5644  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5645  */
5646 static int iwl_init_geos(struct iwl_priv *priv)
5647 {
5648         struct iwl_channel_info *ch;
5649         struct ieee80211_hw_mode *modes;
5650         struct ieee80211_channel *channels;
5651         struct ieee80211_channel *geo_ch;
5652         struct ieee80211_rate *rates;
5653         int i = 0;
5654         enum {
5655                 A = 0,
5656                 B = 1,
5657                 G = 2,
5658                 A_11N = 3,
5659                 G_11N = 4,
5660         };
5661         int mode_count = 5;
5662
5663         if (priv->modes) {
5664                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5665                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5666                 return 0;
5667         }
5668
5669         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5670                         GFP_KERNEL);
5671         if (!modes)
5672                 return -ENOMEM;
5673
5674         channels = kzalloc(sizeof(struct ieee80211_channel) *
5675                            priv->channel_count, GFP_KERNEL);
5676         if (!channels) {
5677                 kfree(modes);
5678                 return -ENOMEM;
5679         }
5680
5681         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5682                         GFP_KERNEL);
5683         if (!rates) {
5684                 kfree(modes);
5685                 kfree(channels);
5686                 return -ENOMEM;
5687         }
5688
5689         /* 0 = 802.11a
5690          * 1 = 802.11b
5691          * 2 = 802.11g
5692          */
5693
5694         /* 5.2GHz channels start after the 2.4GHz channels */
5695         modes[A].mode = MODE_IEEE80211A;
5696         modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5697         modes[A].rates = rates;
5698         modes[A].num_rates = 8; /* just OFDM */
5699         modes[A].rates = &rates[4];
5700         modes[A].num_channels = 0;
5701
5702         modes[B].mode = MODE_IEEE80211B;
5703         modes[B].channels = channels;
5704         modes[B].rates = rates;
5705         modes[B].num_rates = 4; /* just CCK */
5706         modes[B].num_channels = 0;
5707
5708         modes[G].mode = MODE_IEEE80211G;
5709         modes[G].channels = channels;
5710         modes[G].rates = rates;
5711         modes[G].num_rates = 12;        /* OFDM & CCK */
5712         modes[G].num_channels = 0;
5713
5714         modes[G_11N].mode = MODE_IEEE80211G;
5715         modes[G_11N].channels = channels;
5716         modes[G_11N].num_rates = 13;        /* OFDM & CCK */
5717         modes[G_11N].rates = rates;
5718         modes[G_11N].num_channels = 0;
5719
5720         modes[A_11N].mode = MODE_IEEE80211A;
5721         modes[A_11N].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5722         modes[A_11N].rates = &rates[4];
5723         modes[A_11N].num_rates = 9; /* just OFDM */
5724         modes[A_11N].num_channels = 0;
5725
5726         priv->ieee_channels = channels;
5727         priv->ieee_rates = rates;
5728
5729         iwl_init_hw_rates(priv, rates);
5730
5731         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5732                 ch = &priv->channel_info[i];
5733
5734                 if (!is_channel_valid(ch)) {
5735                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5736                                     "skipping.\n",
5737                                     ch->channel, is_channel_a_band(ch) ?
5738                                     "5.2" : "2.4");
5739                         continue;
5740                 }
5741
5742                 if (is_channel_a_band(ch)) {
5743                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5744                         modes[A_11N].num_channels++;
5745                 } else {
5746                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5747                         modes[G].num_channels++;
5748                         modes[G_11N].num_channels++;
5749                 }
5750
5751                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5752                 geo_ch->chan = ch->channel;
5753                 geo_ch->power_level = ch->max_power_avg;
5754                 geo_ch->antenna_max = 0xff;
5755
5756                 if (is_channel_valid(ch)) {
5757                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5758                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5759                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5760
5761                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5762                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5763
5764                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5765                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5766
5767                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5768                                 priv->max_channel_txpower_limit =
5769                                     ch->max_power_avg;
5770                 }
5771
5772                 geo_ch->val = geo_ch->flag;
5773         }
5774
5775         if ((modes[A].num_channels == 0) && priv->is_abg) {
5776                 printk(KERN_INFO DRV_NAME
5777                        ": Incorrectly detected BG card as ABG.  Please send "
5778                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5779                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5780                 priv->is_abg = 0;
5781         }
5782
5783         printk(KERN_INFO DRV_NAME
5784                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5785                modes[G].num_channels, modes[A].num_channels);
5786
5787         /*
5788          * NOTE:  We register these in preference of order -- the
5789          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5790          * a phymode based on rates or AP capabilities but seems to
5791          * configure it purely on if the channel being configured
5792          * is supported by a mode -- and the first match is taken
5793          */
5794
5795         if (modes[G].num_channels)
5796                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5797         if (modes[B].num_channels)
5798                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5799         if (modes[A].num_channels)
5800                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5801
5802         priv->modes = modes;
5803         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5804
5805         return 0;
5806 }
5807
5808 /******************************************************************************
5809  *
5810  * uCode download functions
5811  *
5812  ******************************************************************************/
5813
5814 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5815 {
5816         if (priv->ucode_code.v_addr != NULL) {
5817                 pci_free_consistent(priv->pci_dev,
5818                                     priv->ucode_code.len,
5819                                     priv->ucode_code.v_addr,
5820                                     priv->ucode_code.p_addr);
5821                 priv->ucode_code.v_addr = NULL;
5822         }
5823         if (priv->ucode_data.v_addr != NULL) {
5824                 pci_free_consistent(priv->pci_dev,
5825                                     priv->ucode_data.len,
5826                                     priv->ucode_data.v_addr,
5827                                     priv->ucode_data.p_addr);
5828                 priv->ucode_data.v_addr = NULL;
5829         }
5830         if (priv->ucode_data_backup.v_addr != NULL) {
5831                 pci_free_consistent(priv->pci_dev,
5832                                     priv->ucode_data_backup.len,
5833                                     priv->ucode_data_backup.v_addr,
5834                                     priv->ucode_data_backup.p_addr);
5835                 priv->ucode_data_backup.v_addr = NULL;
5836         }
5837         if (priv->ucode_init.v_addr != NULL) {
5838                 pci_free_consistent(priv->pci_dev,
5839                                     priv->ucode_init.len,
5840                                     priv->ucode_init.v_addr,
5841                                     priv->ucode_init.p_addr);
5842                 priv->ucode_init.v_addr = NULL;
5843         }
5844         if (priv->ucode_init_data.v_addr != NULL) {
5845                 pci_free_consistent(priv->pci_dev,
5846                                     priv->ucode_init_data.len,
5847                                     priv->ucode_init_data.v_addr,
5848                                     priv->ucode_init_data.p_addr);
5849                 priv->ucode_init_data.v_addr = NULL;
5850         }
5851         if (priv->ucode_boot.v_addr != NULL) {
5852                 pci_free_consistent(priv->pci_dev,
5853                                     priv->ucode_boot.len,
5854                                     priv->ucode_boot.v_addr,
5855                                     priv->ucode_boot.p_addr);
5856                 priv->ucode_boot.v_addr = NULL;
5857         }
5858 }
5859
5860 /**
5861  * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5862  *     looking at all data.
5863  */
5864 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5865 {
5866         u32 val;
5867         u32 save_len = len;
5868         int rc = 0;
5869         u32 errcnt;
5870
5871         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5872
5873         rc = iwl_grab_restricted_access(priv);
5874         if (rc)
5875                 return rc;
5876
5877         iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5878
5879         errcnt = 0;
5880         for (; len > 0; len -= sizeof(u32), image++) {
5881                 /* read data comes through single port, auto-incr addr */
5882                 /* NOTE: Use the debugless read so we don't flood kernel log
5883                  * if IWL_DL_IO is set */
5884                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5885                 if (val != le32_to_cpu(*image)) {
5886                         IWL_ERROR("uCode INST section is invalid at "
5887                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5888                                   save_len - len, val, le32_to_cpu(*image));
5889                         rc = -EIO;
5890                         errcnt++;
5891                         if (errcnt >= 20)
5892                                 break;
5893                 }
5894         }
5895
5896         iwl_release_restricted_access(priv);
5897
5898         if (!errcnt)
5899                 IWL_DEBUG_INFO
5900                     ("ucode image in INSTRUCTION memory is good\n");
5901
5902         return rc;
5903 }
5904
5905
5906 /**
5907  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5908  *   using sample data 100 bytes apart.  If these sample points are good,
5909  *   it's a pretty good bet that everything between them is good, too.
5910  */
5911 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5912 {
5913         u32 val;
5914         int rc = 0;
5915         u32 errcnt = 0;
5916         u32 i;
5917
5918         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5919
5920         rc = iwl_grab_restricted_access(priv);
5921         if (rc)
5922                 return rc;
5923
5924         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5925                 /* read data comes through single port, auto-incr addr */
5926                 /* NOTE: Use the debugless read so we don't flood kernel log
5927                  * if IWL_DL_IO is set */
5928                 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5929                         i + RTC_INST_LOWER_BOUND);
5930                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5931                 if (val != le32_to_cpu(*image)) {
5932 #if 0 /* Enable this if you want to see details */
5933                         IWL_ERROR("uCode INST section is invalid at "
5934                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5935                                   i, val, *image);
5936 #endif
5937                         rc = -EIO;
5938                         errcnt++;
5939                         if (errcnt >= 3)
5940                                 break;
5941                 }
5942         }
5943
5944         iwl_release_restricted_access(priv);
5945
5946         return rc;
5947 }
5948
5949
5950 /**
5951  * iwl_verify_ucode - determine which instruction image is in SRAM,
5952  *    and verify its contents
5953  */
5954 static int iwl_verify_ucode(struct iwl_priv *priv)
5955 {
5956         __le32 *image;
5957         u32 len;
5958         int rc = 0;
5959
5960         /* Try bootstrap */
5961         image = (__le32 *)priv->ucode_boot.v_addr;
5962         len = priv->ucode_boot.len;
5963         rc = iwl_verify_inst_sparse(priv, image, len);
5964         if (rc == 0) {
5965                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5966                 return 0;
5967         }
5968
5969         /* Try initialize */
5970         image = (__le32 *)priv->ucode_init.v_addr;
5971         len = priv->ucode_init.len;
5972         rc = iwl_verify_inst_sparse(priv, image, len);
5973         if (rc == 0) {
5974                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5975                 return 0;
5976         }
5977
5978         /* Try runtime/protocol */
5979         image = (__le32 *)priv->ucode_code.v_addr;
5980         len = priv->ucode_code.len;
5981         rc = iwl_verify_inst_sparse(priv, image, len);
5982         if (rc == 0) {
5983                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5984                 return 0;
5985         }
5986
5987         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5988
5989         /* Show first several data entries in instruction SRAM.
5990          * Selection of bootstrap image is arbitrary. */
5991         image = (__le32 *)priv->ucode_boot.v_addr;
5992         len = priv->ucode_boot.len;
5993         rc = iwl_verify_inst_full(priv, image, len);
5994
5995         return rc;
5996 }
5997
5998
5999 /* check contents of special bootstrap uCode SRAM */
6000 static int iwl_verify_bsm(struct iwl_priv *priv)
6001 {
6002         __le32 *image = priv->ucode_boot.v_addr;
6003         u32 len = priv->ucode_boot.len;
6004         u32 reg;
6005         u32 val;
6006
6007         IWL_DEBUG_INFO("Begin verify bsm\n");
6008
6009         /* verify BSM SRAM contents */
6010         val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
6011         for (reg = BSM_SRAM_LOWER_BOUND;
6012              reg < BSM_SRAM_LOWER_BOUND + len;
6013              reg += sizeof(u32), image ++) {
6014                 val = iwl_read_restricted_reg(priv, reg);
6015                 if (val != le32_to_cpu(*image)) {
6016                         IWL_ERROR("BSM uCode verification failed at "
6017                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6018                                   BSM_SRAM_LOWER_BOUND,
6019                                   reg - BSM_SRAM_LOWER_BOUND, len,
6020                                   val, le32_to_cpu(*image));
6021                         return -EIO;
6022                 }
6023         }
6024
6025         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6026
6027         return 0;
6028 }
6029
6030 /**
6031  * iwl_load_bsm - Load bootstrap instructions
6032  *
6033  * BSM operation:
6034  *
6035  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6036  * in special SRAM that does not power down during RFKILL.  When powering back
6037  * up after power-saving sleeps (or during initial uCode load), the BSM loads
6038  * the bootstrap program into the on-board processor, and starts it.
6039  *
6040  * The bootstrap program loads (via DMA) instructions and data for a new
6041  * program from host DRAM locations indicated by the host driver in the
6042  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
6043  * automatically.
6044  *
6045  * When initializing the NIC, the host driver points the BSM to the
6046  * "initialize" uCode image.  This uCode sets up some internal data, then
6047  * notifies host via "initialize alive" that it is complete.
6048  *
6049  * The host then replaces the BSM_DRAM_* pointer values to point to the
6050  * normal runtime uCode instructions and a backup uCode data cache buffer
6051  * (filled initially with starting data values for the on-board processor),
6052  * then triggers the "initialize" uCode to load and launch the runtime uCode,
6053  * which begins normal operation.
6054  *
6055  * When doing a power-save shutdown, runtime uCode saves data SRAM into
6056  * the backup data cache in DRAM before SRAM is powered down.
6057  *
6058  * When powering back up, the BSM loads the bootstrap program.  This reloads
6059  * the runtime uCode instructions and the backup data cache into SRAM,
6060  * and re-launches the runtime uCode from where it left off.
6061  */
6062 static int iwl_load_bsm(struct iwl_priv *priv)
6063 {
6064         __le32 *image = priv->ucode_boot.v_addr;
6065         u32 len = priv->ucode_boot.len;
6066         dma_addr_t pinst;
6067         dma_addr_t pdata;
6068         u32 inst_len;
6069         u32 data_len;
6070         int rc;
6071         int i;
6072         u32 done;
6073         u32 reg_offset;
6074
6075         IWL_DEBUG_INFO("Begin load bsm\n");
6076
6077         /* make sure bootstrap program is no larger than BSM's SRAM size */
6078         if (len > IWL_MAX_BSM_SIZE)
6079                 return -EINVAL;
6080
6081         /* Tell bootstrap uCode where to find the "Initialize" uCode
6082          *   in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
6083          * NOTE:  iwl_initialize_alive_start() will replace these values,
6084          *        after the "initialize" uCode has run, to point to
6085          *        runtime/protocol instructions and backup data cache. */
6086         pinst = priv->ucode_init.p_addr >> 4;
6087         pdata = priv->ucode_init_data.p_addr >> 4;
6088         inst_len = priv->ucode_init.len;
6089         data_len = priv->ucode_init_data.len;
6090
6091         rc = iwl_grab_restricted_access(priv);
6092         if (rc)
6093                 return rc;
6094
6095         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6096         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6097         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6098         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6099
6100         /* Fill BSM memory with bootstrap instructions */
6101         for (reg_offset = BSM_SRAM_LOWER_BOUND;
6102              reg_offset < BSM_SRAM_LOWER_BOUND + len;
6103              reg_offset += sizeof(u32), image++)
6104                 _iwl_write_restricted_reg(priv, reg_offset,
6105                                           le32_to_cpu(*image));
6106
6107         rc = iwl_verify_bsm(priv);
6108         if (rc) {
6109                 iwl_release_restricted_access(priv);
6110                 return rc;
6111         }
6112
6113         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6114         iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
6115         iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
6116                                  RTC_INST_LOWER_BOUND);
6117         iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6118
6119         /* Load bootstrap code into instruction SRAM now,
6120          *   to prepare to load "initialize" uCode */
6121         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6122                 BSM_WR_CTRL_REG_BIT_START);
6123
6124         /* Wait for load of bootstrap uCode to finish */
6125         for (i = 0; i < 100; i++) {
6126                 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
6127                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6128                         break;
6129                 udelay(10);
6130         }
6131         if (i < 100)
6132                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6133         else {
6134                 IWL_ERROR("BSM write did not complete!\n");
6135                 return -EIO;
6136         }
6137
6138         /* Enable future boot loads whenever power management unit triggers it
6139          *   (e.g. when powering back up after power-save shutdown) */
6140         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6141                 BSM_WR_CTRL_REG_BIT_START_EN);
6142
6143         iwl_release_restricted_access(priv);
6144
6145         return 0;
6146 }
6147
6148 static void iwl_nic_start(struct iwl_priv *priv)
6149 {
6150         /* Remove all resets to allow NIC to operate */
6151         iwl_write32(priv, CSR_RESET, 0);
6152 }
6153
6154 /**
6155  * iwl_read_ucode - Read uCode images from disk file.
6156  *
6157  * Copy into buffers for card to fetch via bus-mastering
6158  */
6159 static int iwl_read_ucode(struct iwl_priv *priv)
6160 {
6161         struct iwl_ucode *ucode;
6162         int rc = 0;
6163         const struct firmware *ucode_raw;
6164         const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6165         u8 *src;
6166         size_t len;
6167         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6168
6169         /* Ask kernel firmware_class module to get the boot firmware off disk.
6170          * request_firmware() is synchronous, file is in memory on return. */
6171         rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6172         if (rc < 0) {
6173                 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
6174                 goto error;
6175         }
6176
6177         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6178                        name, ucode_raw->size);
6179
6180         /* Make sure that we got at least our header! */
6181         if (ucode_raw->size < sizeof(*ucode)) {
6182                 IWL_ERROR("File size way too small!\n");
6183                 rc = -EINVAL;
6184                 goto err_release;
6185         }
6186
6187         /* Data from ucode file:  header followed by uCode images */
6188         ucode = (void *)ucode_raw->data;
6189
6190         ver = le32_to_cpu(ucode->ver);
6191         inst_size = le32_to_cpu(ucode->inst_size);
6192         data_size = le32_to_cpu(ucode->data_size);
6193         init_size = le32_to_cpu(ucode->init_size);
6194         init_data_size = le32_to_cpu(ucode->init_data_size);
6195         boot_size = le32_to_cpu(ucode->boot_size);
6196
6197         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6198         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6199                        inst_size);
6200         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6201                        data_size);
6202         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6203                        init_size);
6204         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6205                        init_data_size);
6206         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6207                        boot_size);
6208
6209         /* Verify size of file vs. image size info in file's header */
6210         if (ucode_raw->size < sizeof(*ucode) +
6211                 inst_size + data_size + init_size +
6212                 init_data_size + boot_size) {
6213
6214                 IWL_DEBUG_INFO("uCode file size %d too small\n",
6215                                (int)ucode_raw->size);
6216                 rc = -EINVAL;
6217                 goto err_release;
6218         }
6219
6220         /* Verify that uCode images will fit in card's SRAM */
6221         if (inst_size > IWL_MAX_INST_SIZE) {
6222                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
6223                                (int)inst_size);
6224                 rc = -EINVAL;
6225                 goto err_release;
6226         }
6227
6228         if (data_size > IWL_MAX_DATA_SIZE) {
6229                 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
6230                                (int)data_size);
6231                 rc = -EINVAL;
6232                 goto err_release;
6233         }
6234         if (init_size > IWL_MAX_INST_SIZE) {
6235                 IWL_DEBUG_INFO
6236                     ("uCode init instr len %d too large to fit in card\n",
6237                      (int)init_size);
6238                 rc = -EINVAL;
6239                 goto err_release;
6240         }
6241         if (init_data_size > IWL_MAX_DATA_SIZE) {
6242                 IWL_DEBUG_INFO
6243                     ("uCode init data len %d too large to fit in card\n",
6244                      (int)init_data_size);
6245                 rc = -EINVAL;
6246                 goto err_release;
6247         }
6248         if (boot_size > IWL_MAX_BSM_SIZE) {
6249                 IWL_DEBUG_INFO
6250                     ("uCode boot instr len %d too large to fit in bsm\n",
6251                      (int)boot_size);
6252                 rc = -EINVAL;
6253                 goto err_release;
6254         }
6255
6256         /* Allocate ucode buffers for card's bus-master loading ... */
6257
6258         /* Runtime instructions and 2 copies of data:
6259          * 1) unmodified from disk
6260          * 2) backup cache for save/restore during power-downs */
6261         priv->ucode_code.len = inst_size;
6262         priv->ucode_code.v_addr =
6263             pci_alloc_consistent(priv->pci_dev,
6264                                  priv->ucode_code.len,
6265                                  &(priv->ucode_code.p_addr));
6266
6267         priv->ucode_data.len = data_size;
6268         priv->ucode_data.v_addr =
6269             pci_alloc_consistent(priv->pci_dev,
6270                                  priv->ucode_data.len,
6271                                  &(priv->ucode_data.p_addr));
6272
6273         priv->ucode_data_backup.len = data_size;
6274         priv->ucode_data_backup.v_addr =
6275             pci_alloc_consistent(priv->pci_dev,
6276                                  priv->ucode_data_backup.len,
6277                                  &(priv->ucode_data_backup.p_addr));
6278
6279
6280         /* Initialization instructions and data */
6281         priv->ucode_init.len = init_size;
6282         priv->ucode_init.v_addr =
6283             pci_alloc_consistent(priv->pci_dev,
6284                                  priv->ucode_init.len,
6285                                  &(priv->ucode_init.p_addr));
6286
6287         priv->ucode_init_data.len = init_data_size;
6288         priv->ucode_init_data.v_addr =
6289             pci_alloc_consistent(priv->pci_dev,
6290                                  priv->ucode_init_data.len,
6291                                  &(priv->ucode_init_data.p_addr));
6292
6293         /* Bootstrap (instructions only, no data) */
6294         priv->ucode_boot.len = boot_size;
6295         priv->ucode_boot.v_addr =
6296             pci_alloc_consistent(priv->pci_dev,
6297                                  priv->ucode_boot.len,
6298                                  &(priv->ucode_boot.p_addr));
6299
6300         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
6301             !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
6302             !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
6303                 goto err_pci_alloc;
6304
6305         /* Copy images into buffers for card's bus-master reads ... */
6306
6307         /* Runtime instructions (first block of data in file) */
6308         src = &ucode->data[0];
6309         len = priv->ucode_code.len;
6310         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
6311                        (int)len);
6312         memcpy(priv->ucode_code.v_addr, src, len);
6313         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6314                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6315
6316         /* Runtime data (2nd block)
6317          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
6318         src = &ucode->data[inst_size];
6319         len = priv->ucode_data.len;
6320         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
6321                        (int)len);
6322         memcpy(priv->ucode_data.v_addr, src, len);
6323         memcpy(priv->ucode_data_backup.v_addr, src, len);
6324
6325         /* Initialization instructions (3rd block) */
6326         if (init_size) {
6327                 src = &ucode->data[inst_size + data_size];
6328                 len = priv->ucode_init.len;
6329                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
6330                                (int)len);
6331                 memcpy(priv->ucode_init.v_addr, src, len);
6332         }
6333
6334         /* Initialization data (4th block) */
6335         if (init_data_size) {
6336                 src = &ucode->data[inst_size + data_size + init_size];
6337                 len = priv->ucode_init_data.len;
6338                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6339                                (int)len);
6340                 memcpy(priv->ucode_init_data.v_addr, src, len);
6341         }
6342
6343         /* Bootstrap instructions (5th block) */
6344         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6345         len = priv->ucode_boot.len;
6346         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6347                        (int)len);
6348         memcpy(priv->ucode_boot.v_addr, src, len);
6349
6350         /* We have our copies now, allow OS release its copies */
6351         release_firmware(ucode_raw);
6352         return 0;
6353
6354  err_pci_alloc:
6355         IWL_ERROR("failed to allocate pci memory\n");
6356         rc = -ENOMEM;
6357         iwl_dealloc_ucode_pci(priv);
6358
6359  err_release:
6360         release_firmware(ucode_raw);
6361
6362  error:
6363         return rc;
6364 }
6365
6366
6367 /**
6368  * iwl_set_ucode_ptrs - Set uCode address location
6369  *
6370  * Tell initialization uCode where to find runtime uCode.
6371  *
6372  * BSM registers initially contain pointers to initialization uCode.
6373  * We need to replace them to load runtime uCode inst and data,
6374  * and to save runtime data when powering down.
6375  */
6376 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6377 {
6378         dma_addr_t pinst;
6379         dma_addr_t pdata;
6380         int rc = 0;
6381         unsigned long flags;
6382
6383         /* bits 35:4 for 4965 */
6384         pinst = priv->ucode_code.p_addr >> 4;
6385         pdata = priv->ucode_data_backup.p_addr >> 4;
6386
6387         spin_lock_irqsave(&priv->lock, flags);
6388         rc = iwl_grab_restricted_access(priv);
6389         if (rc) {
6390                 spin_unlock_irqrestore(&priv->lock, flags);
6391                 return rc;
6392         }
6393
6394         /* Tell bootstrap uCode where to find image to load */
6395         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6396         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6397         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6398                                  priv->ucode_data.len);
6399
6400         /* Inst bytecount must be last to set up, bit 31 signals uCode
6401          *   that all new ptr/size info is in place */
6402         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6403                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6404
6405         iwl_release_restricted_access(priv);
6406
6407         spin_unlock_irqrestore(&priv->lock, flags);
6408
6409         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6410
6411         return rc;
6412 }
6413
6414 /**
6415  * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6416  *
6417  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6418  *
6419  * The 4965 "initialize" ALIVE reply contains calibration data for:
6420  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6421  *   (3945 does not contain this data).
6422  *
6423  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6424 */
6425 static void iwl_init_alive_start(struct iwl_priv *priv)
6426 {
6427         /* Check alive response for "valid" sign from uCode */
6428         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6429                 /* We had an error bringing up the hardware, so take it
6430                  * all the way back down so we can try again */
6431                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6432                 goto restart;
6433         }
6434
6435         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6436          * This is a paranoid check, because we would not have gotten the
6437          * "initialize" alive if code weren't properly loaded.  */
6438         if (iwl_verify_ucode(priv)) {
6439                 /* Runtime instruction load was bad;
6440                  * take it all the way back down so we can try again */
6441                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6442                 goto restart;
6443         }
6444
6445         /* Calculate temperature */
6446         priv->temperature = iwl4965_get_temperature(priv);
6447
6448         /* Send pointers to protocol/runtime uCode image ... init code will
6449          * load and launch runtime uCode, which will send us another "Alive"
6450          * notification. */
6451         IWL_DEBUG_INFO("Initialization Alive received.\n");
6452         if (iwl_set_ucode_ptrs(priv)) {
6453                 /* Runtime instruction load won't happen;
6454                  * take it all the way back down so we can try again */
6455                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6456                 goto restart;
6457         }
6458         return;
6459
6460  restart:
6461         queue_work(priv->workqueue, &priv->restart);
6462 }
6463
6464
6465 /**
6466  * iwl_alive_start - called after REPLY_ALIVE notification received
6467  *                   from protocol/runtime uCode (initialization uCode's
6468  *                   Alive gets handled by iwl_init_alive_start()).
6469  */
6470 static void iwl_alive_start(struct iwl_priv *priv)
6471 {
6472         int rc = 0;
6473
6474         IWL_DEBUG_INFO("Runtime Alive received.\n");
6475
6476         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6477                 /* We had an error bringing up the hardware, so take it
6478                  * all the way back down so we can try again */
6479                 IWL_DEBUG_INFO("Alive failed.\n");
6480                 goto restart;
6481         }
6482
6483         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6484          * This is a paranoid check, because we would not have gotten the
6485          * "runtime" alive if code weren't properly loaded.  */
6486         if (iwl_verify_ucode(priv)) {
6487                 /* Runtime instruction load was bad;
6488                  * take it all the way back down so we can try again */
6489                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6490                 goto restart;
6491         }
6492
6493         iwl_clear_stations_table(priv);
6494
6495         rc = iwl4965_alive_notify(priv);
6496         if (rc) {
6497                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6498                             rc);
6499                 goto restart;
6500         }
6501
6502         /* After the ALIVE response, we can process host commands */
6503         set_bit(STATUS_ALIVE, &priv->status);
6504
6505         /* Clear out the uCode error bit if it is set */
6506         clear_bit(STATUS_FW_ERROR, &priv->status);
6507
6508         rc = iwl_init_channel_map(priv);
6509         if (rc) {
6510                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6511                 return;
6512         }
6513
6514         iwl_init_geos(priv);
6515
6516         if (iwl_is_rfkill(priv))
6517                 return;
6518
6519         if (!priv->mac80211_registered) {
6520                 /* Unlock so any user space entry points can call back into
6521                  * the driver without a deadlock... */
6522                 mutex_unlock(&priv->mutex);
6523                 iwl_rate_control_register(priv->hw);
6524                 rc = ieee80211_register_hw(priv->hw);
6525                 priv->hw->conf.beacon_int = 100;
6526                 mutex_lock(&priv->mutex);
6527
6528                 if (rc) {
6529                         IWL_ERROR("Failed to register network "
6530                                   "device (error %d)\n", rc);
6531                         return;
6532                 }
6533
6534                 priv->mac80211_registered = 1;
6535
6536                 iwl_reset_channel_flag(priv);
6537         } else
6538                 ieee80211_start_queues(priv->hw);
6539
6540         priv->active_rate = priv->rates_mask;
6541         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6542
6543         iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6544
6545         if (iwl_is_associated(priv)) {
6546                 struct iwl_rxon_cmd *active_rxon =
6547                                 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6548
6549                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6550                        sizeof(priv->staging_rxon));
6551                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6552         } else {
6553                 /* Initialize our rx_config data */
6554                 iwl_connection_init_rx_config(priv);
6555                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6556         }
6557
6558         /* Configure BT coexistence */
6559         iwl_send_bt_config(priv);
6560
6561         /* Configure the adapter for unassociated operation */
6562         iwl_commit_rxon(priv);
6563
6564         /* At this point, the NIC is initialized and operational */
6565         priv->notif_missed_beacons = 0;
6566         set_bit(STATUS_READY, &priv->status);
6567
6568         iwl4965_rf_kill_ct_config(priv);
6569         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6570
6571         if (priv->error_recovering)
6572                 iwl_error_recovery(priv);
6573
6574         return;
6575
6576  restart:
6577         queue_work(priv->workqueue, &priv->restart);
6578 }
6579
6580 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6581
6582 static void __iwl_down(struct iwl_priv *priv)
6583 {
6584         unsigned long flags;
6585         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6586         struct ieee80211_conf *conf = NULL;
6587
6588         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6589
6590         conf = ieee80211_get_hw_conf(priv->hw);
6591
6592         if (!exit_pending)
6593                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6594
6595         iwl_clear_stations_table(priv);
6596
6597         /* Unblock any waiting calls */
6598         wake_up_interruptible_all(&priv->wait_command_queue);
6599
6600         iwl_cancel_deferred_work(priv);
6601
6602         /* Wipe out the EXIT_PENDING status bit if we are not actually
6603          * exiting the module */
6604         if (!exit_pending)
6605                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6606
6607         /* stop and reset the on-board processor */
6608         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6609
6610         /* tell the device to stop sending interrupts */
6611         iwl_disable_interrupts(priv);
6612
6613         if (priv->mac80211_registered)
6614                 ieee80211_stop_queues(priv->hw);
6615
6616         /* If we have not previously called iwl_init() then
6617          * clear all bits but the RF Kill and SUSPEND bits and return */
6618         if (!iwl_is_init(priv)) {
6619                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6620                                         STATUS_RF_KILL_HW |
6621                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6622                                         STATUS_RF_KILL_SW |
6623                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6624                                         STATUS_IN_SUSPEND;
6625                 goto exit;
6626         }
6627
6628         /* ...otherwise clear out all the status bits but the RF Kill and
6629          * SUSPEND bits and continue taking the NIC down. */
6630         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6631                                 STATUS_RF_KILL_HW |
6632                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6633                                 STATUS_RF_KILL_SW |
6634                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6635                                 STATUS_IN_SUSPEND |
6636                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6637                                 STATUS_FW_ERROR;
6638
6639         spin_lock_irqsave(&priv->lock, flags);
6640         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6641         spin_unlock_irqrestore(&priv->lock, flags);
6642
6643         iwl_hw_txq_ctx_stop(priv);
6644         iwl_hw_rxq_stop(priv);
6645
6646         spin_lock_irqsave(&priv->lock, flags);
6647         if (!iwl_grab_restricted_access(priv)) {
6648                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6649                                          APMG_CLK_VAL_DMA_CLK_RQT);
6650                 iwl_release_restricted_access(priv);
6651         }
6652         spin_unlock_irqrestore(&priv->lock, flags);
6653
6654         udelay(5);
6655
6656         iwl_hw_nic_stop_master(priv);
6657         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6658         iwl_hw_nic_reset(priv);
6659
6660  exit:
6661         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6662
6663         if (priv->ibss_beacon)
6664                 dev_kfree_skb(priv->ibss_beacon);
6665         priv->ibss_beacon = NULL;
6666
6667         /* clear out any free frames */
6668         iwl_clear_free_frames(priv);
6669 }
6670
6671 static void iwl_down(struct iwl_priv *priv)
6672 {
6673         mutex_lock(&priv->mutex);
6674         __iwl_down(priv);
6675         mutex_unlock(&priv->mutex);
6676 }
6677
6678 #define MAX_HW_RESTARTS 5
6679
6680 static int __iwl_up(struct iwl_priv *priv)
6681 {
6682         DECLARE_MAC_BUF(mac);
6683         int rc, i;
6684         u32 hw_rf_kill = 0;
6685
6686         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6687                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6688                 return -EIO;
6689         }
6690
6691         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6692                 IWL_WARNING("Radio disabled by SW RF kill (module "
6693                             "parameter)\n");
6694                 return 0;
6695         }
6696
6697         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6698
6699         rc = iwl_hw_nic_init(priv);
6700         if (rc) {
6701                 IWL_ERROR("Unable to int nic\n");
6702                 return rc;
6703         }
6704
6705         /* make sure rfkill handshake bits are cleared */
6706         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6707         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6708                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6709
6710         /* clear (again), then enable host interrupts */
6711         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6712         iwl_enable_interrupts(priv);
6713
6714         /* really make sure rfkill handshake bits are cleared */
6715         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6716         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6717
6718         /* Copy original ucode data image from disk into backup cache.
6719          * This will be used to initialize the on-board processor's
6720          * data SRAM for a clean start when the runtime program first loads. */
6721         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6722                         priv->ucode_data.len);
6723
6724         /* If platform's RF_KILL switch is set to KILL,
6725          * wait for BIT_INT_RF_KILL interrupt before loading uCode
6726          * and getting things started */
6727         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
6728                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
6729                 hw_rf_kill = 1;
6730
6731         if (test_bit(STATUS_RF_KILL_HW, &priv->status) || hw_rf_kill) {
6732                 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6733                 return 0;
6734         }
6735
6736         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6737
6738                 iwl_clear_stations_table(priv);
6739
6740                 /* load bootstrap state machine,
6741                  * load bootstrap program into processor's memory,
6742                  * prepare to load the "initialize" uCode */
6743                 rc = iwl_load_bsm(priv);
6744
6745                 if (rc) {
6746                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6747                         continue;
6748                 }
6749
6750                 /* start card; "initialize" will load runtime ucode */
6751                 iwl_nic_start(priv);
6752
6753                 /* MAC Address location in EEPROM same for 3945/4965 */
6754                 get_eeprom_mac(priv, priv->mac_addr);
6755                 IWL_DEBUG_INFO("MAC address: %s\n",
6756                                print_mac(mac, priv->mac_addr));
6757
6758                 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6759
6760                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6761
6762                 return 0;
6763         }
6764
6765         set_bit(STATUS_EXIT_PENDING, &priv->status);
6766         __iwl_down(priv);
6767
6768         /* tried to restart and config the device for as long as our
6769          * patience could withstand */
6770         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6771         return -EIO;
6772 }
6773
6774
6775 /*****************************************************************************
6776  *
6777  * Workqueue callbacks
6778  *
6779  *****************************************************************************/
6780
6781 static void iwl_bg_init_alive_start(struct work_struct *data)
6782 {
6783         struct iwl_priv *priv =
6784             container_of(data, struct iwl_priv, init_alive_start.work);
6785
6786         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6787                 return;
6788
6789         mutex_lock(&priv->mutex);
6790         iwl_init_alive_start(priv);
6791         mutex_unlock(&priv->mutex);
6792 }
6793
6794 static void iwl_bg_alive_start(struct work_struct *data)
6795 {
6796         struct iwl_priv *priv =
6797             container_of(data, struct iwl_priv, alive_start.work);
6798
6799         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6800                 return;
6801
6802         mutex_lock(&priv->mutex);
6803         iwl_alive_start(priv);
6804         mutex_unlock(&priv->mutex);
6805 }
6806
6807 static void iwl_bg_rf_kill(struct work_struct *work)
6808 {
6809         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6810
6811         wake_up_interruptible(&priv->wait_command_queue);
6812
6813         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6814                 return;
6815
6816         mutex_lock(&priv->mutex);
6817
6818         if (!iwl_is_rfkill(priv)) {
6819                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6820                           "HW and/or SW RF Kill no longer active, restarting "
6821                           "device\n");
6822                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6823                         queue_work(priv->workqueue, &priv->restart);
6824         } else {
6825
6826                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6827                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6828                                           "disabled by SW switch\n");
6829                 else
6830                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6831                                     "Kill switch must be turned off for "
6832                                     "wireless networking to work.\n");
6833         }
6834         mutex_unlock(&priv->mutex);
6835 }
6836
6837 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6838
6839 static void iwl_bg_scan_check(struct work_struct *data)
6840 {
6841         struct iwl_priv *priv =
6842             container_of(data, struct iwl_priv, scan_check.work);
6843
6844         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6845                 return;
6846
6847         mutex_lock(&priv->mutex);
6848         if (test_bit(STATUS_SCANNING, &priv->status) ||
6849             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6850                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6851                           "Scan completion watchdog resetting adapter (%dms)\n",
6852                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6853                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6854                         queue_work(priv->workqueue, &priv->restart);
6855         }
6856         mutex_unlock(&priv->mutex);
6857 }
6858
6859 static void iwl_bg_request_scan(struct work_struct *data)
6860 {
6861         struct iwl_priv *priv =
6862             container_of(data, struct iwl_priv, request_scan);
6863         struct iwl_host_cmd cmd = {
6864                 .id = REPLY_SCAN_CMD,
6865                 .len = sizeof(struct iwl_scan_cmd),
6866                 .meta.flags = CMD_SIZE_HUGE,
6867         };
6868         int rc = 0;
6869         struct iwl_scan_cmd *scan;
6870         struct ieee80211_conf *conf = NULL;
6871         u8 direct_mask;
6872         int phymode;
6873
6874         conf = ieee80211_get_hw_conf(priv->hw);
6875
6876         mutex_lock(&priv->mutex);
6877
6878         if (!iwl_is_ready(priv)) {
6879                 IWL_WARNING("request scan called when driver not ready.\n");
6880                 goto done;
6881         }
6882
6883         /* Make sure the scan wasn't cancelled before this queued work
6884          * was given the chance to run... */
6885         if (!test_bit(STATUS_SCANNING, &priv->status))
6886                 goto done;
6887
6888         /* This should never be called or scheduled if there is currently
6889          * a scan active in the hardware. */
6890         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6891                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6892                                "Ignoring second request.\n");
6893                 rc = -EIO;
6894                 goto done;
6895         }
6896
6897         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6898                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6899                 goto done;
6900         }
6901
6902         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6903                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6904                 goto done;
6905         }
6906
6907         if (iwl_is_rfkill(priv)) {
6908                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6909                 goto done;
6910         }
6911
6912         if (!test_bit(STATUS_READY, &priv->status)) {
6913                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6914                 goto done;
6915         }
6916
6917         if (!priv->scan_bands) {
6918                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6919                 goto done;
6920         }
6921
6922         if (!priv->scan) {
6923                 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6924                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6925                 if (!priv->scan) {
6926                         rc = -ENOMEM;
6927                         goto done;
6928                 }
6929         }
6930         scan = priv->scan;
6931         memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6932
6933         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6934         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6935
6936         if (iwl_is_associated(priv)) {
6937                 u16 interval = 0;
6938                 u32 extra;
6939                 u32 suspend_time = 100;
6940                 u32 scan_suspend_time = 100;
6941                 unsigned long flags;
6942
6943                 IWL_DEBUG_INFO("Scanning while associated...\n");
6944
6945                 spin_lock_irqsave(&priv->lock, flags);
6946                 interval = priv->beacon_int;
6947                 spin_unlock_irqrestore(&priv->lock, flags);
6948
6949                 scan->suspend_time = 0;
6950                 scan->max_out_time = cpu_to_le32(600 * 1024);
6951                 if (!interval)
6952                         interval = suspend_time;
6953
6954                 extra = (suspend_time / interval) << 22;
6955                 scan_suspend_time = (extra |
6956                     ((suspend_time % interval) * 1024));
6957                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6958                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6959                                scan_suspend_time, interval);
6960         }
6961
6962         /* We should add the ability for user to lock to PASSIVE ONLY */
6963         if (priv->one_direct_scan) {
6964                 IWL_DEBUG_SCAN
6965                     ("Kicking off one direct scan for '%s'\n",
6966                      iwl_escape_essid(priv->direct_ssid,
6967                                       priv->direct_ssid_len));
6968                 scan->direct_scan[0].id = WLAN_EID_SSID;
6969                 scan->direct_scan[0].len = priv->direct_ssid_len;
6970                 memcpy(scan->direct_scan[0].ssid,
6971                        priv->direct_ssid, priv->direct_ssid_len);
6972                 direct_mask = 1;
6973         } else if (!iwl_is_associated(priv)) {
6974                 scan->direct_scan[0].id = WLAN_EID_SSID;
6975                 scan->direct_scan[0].len = priv->essid_len;
6976                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6977                 direct_mask = 1;
6978         } else
6979                 direct_mask = 0;
6980
6981         /* We don't build a direct scan probe request; the uCode will do
6982          * that based on the direct_mask added to each channel entry */
6983         scan->tx_cmd.len = cpu_to_le16(
6984                 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6985                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6986         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6987         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6988         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6989
6990         /* flags + rate selection */
6991
6992         scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
6993
6994         switch (priv->scan_bands) {
6995         case 2:
6996                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6997                 scan->tx_cmd.rate_n_flags =
6998                                 iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6999                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7000
7001                 scan->good_CRC_th = 0;
7002                 phymode = MODE_IEEE80211G;
7003                 break;
7004
7005         case 1:
7006                 scan->tx_cmd.rate_n_flags =
7007                                 iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7008                                 RATE_MCS_ANT_B_MSK);
7009                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7010                 phymode = MODE_IEEE80211A;
7011                 break;
7012
7013         default:
7014                 IWL_WARNING("Invalid scan band count\n");
7015                 goto done;
7016         }
7017
7018         /* select Rx chains */
7019
7020         /* Force use of chains B and C (0x6) for scan Rx.
7021          * Avoid A (0x1) because of its off-channel reception on A-band.
7022          * MIMO is not used here, but value is required to make uCode happy. */
7023         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7024                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7025                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7026                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7027
7028         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7029                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7030
7031         if (direct_mask)
7032                 IWL_DEBUG_SCAN
7033                     ("Initiating direct scan for %s.\n",
7034                      iwl_escape_essid(priv->essid, priv->essid_len));
7035         else
7036                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7037
7038         scan->channel_count =
7039                 iwl_get_channels_for_scan(
7040                         priv, phymode, 1, /* active */
7041                         direct_mask,
7042                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7043
7044         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7045             scan->channel_count * sizeof(struct iwl_scan_channel);
7046         cmd.data = scan;
7047         scan->len = cpu_to_le16(cmd.len);
7048
7049         set_bit(STATUS_SCAN_HW, &priv->status);
7050         rc = iwl_send_cmd_sync(priv, &cmd);
7051         if (rc)
7052                 goto done;
7053
7054         queue_delayed_work(priv->workqueue, &priv->scan_check,
7055                            IWL_SCAN_CHECK_WATCHDOG);
7056
7057         mutex_unlock(&priv->mutex);
7058         return;
7059
7060  done:
7061         /* inform mac80211 sacn aborted */
7062         queue_work(priv->workqueue, &priv->scan_completed);
7063         mutex_unlock(&priv->mutex);
7064 }
7065
7066 static void iwl_bg_up(struct work_struct *data)
7067 {
7068         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
7069
7070         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7071                 return;
7072
7073         mutex_lock(&priv->mutex);
7074         __iwl_up(priv);
7075         mutex_unlock(&priv->mutex);
7076 }
7077
7078 static void iwl_bg_restart(struct work_struct *data)
7079 {
7080         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
7081
7082         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7083                 return;
7084
7085         iwl_down(priv);
7086         queue_work(priv->workqueue, &priv->up);
7087 }
7088
7089 static void iwl_bg_rx_replenish(struct work_struct *data)
7090 {
7091         struct iwl_priv *priv =
7092             container_of(data, struct iwl_priv, rx_replenish);
7093
7094         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7095                 return;
7096
7097         mutex_lock(&priv->mutex);
7098         iwl_rx_replenish(priv);
7099         mutex_unlock(&priv->mutex);
7100 }
7101
7102 static void iwl_bg_post_associate(struct work_struct *data)
7103 {
7104         struct iwl_priv *priv = container_of(data, struct iwl_priv,
7105                                              post_associate.work);
7106
7107         int rc = 0;
7108         struct ieee80211_conf *conf = NULL;
7109         DECLARE_MAC_BUF(mac);
7110
7111         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7112                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7113                 return;
7114         }
7115
7116         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7117                         priv->assoc_id,
7118                         print_mac(mac, priv->active_rxon.bssid_addr));
7119
7120
7121         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7122                 return;
7123
7124         mutex_lock(&priv->mutex);
7125
7126         conf = ieee80211_get_hw_conf(priv->hw);
7127
7128         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7129         iwl_commit_rxon(priv);
7130
7131         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7132         iwl_setup_rxon_timing(priv);
7133         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7134                               sizeof(priv->rxon_timing), &priv->rxon_timing);
7135         if (rc)
7136                 IWL_WARNING("REPLY_RXON_TIMING failed - "
7137                             "Attempting to continue.\n");
7138
7139         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7140
7141 #ifdef CONFIG_IWLWIFI_HT
7142         if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
7143                 iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
7144         else {
7145                 priv->active_rate_ht[0] = 0;
7146                 priv->active_rate_ht[1] = 0;
7147                 priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
7148         }
7149 #endif /* CONFIG_IWLWIFI_HT*/
7150         iwl4965_set_rxon_chain(priv);
7151         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7152
7153         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7154                         priv->assoc_id, priv->beacon_int);
7155
7156         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7157                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7158         else
7159                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7160
7161         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7162                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7163                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7164                 else
7165                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7166
7167                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7168                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7169
7170         }
7171
7172         iwl_commit_rxon(priv);
7173
7174         switch (priv->iw_mode) {
7175         case IEEE80211_IF_TYPE_STA:
7176                 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
7177                 break;
7178
7179         case IEEE80211_IF_TYPE_IBSS:
7180
7181                 /* clear out the station table */
7182                 iwl_clear_stations_table(priv);
7183
7184                 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7185                 iwl_rxon_add_station(priv, priv->bssid, 0);
7186                 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
7187                 iwl_send_beacon_cmd(priv);
7188
7189                 break;
7190
7191         default:
7192                 IWL_ERROR("%s Should not be called in %d mode\n",
7193                                 __FUNCTION__, priv->iw_mode);
7194                 break;
7195         }
7196
7197         iwl_sequence_reset(priv);
7198
7199 #ifdef CONFIG_IWLWIFI_SENSITIVITY
7200         /* Enable Rx differential gain and sensitivity calibrations */
7201         iwl4965_chain_noise_reset(priv);
7202         priv->start_calib = 1;
7203 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
7204
7205         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7206                 priv->assoc_station_added = 1;
7207
7208 #ifdef CONFIG_IWLWIFI_QOS
7209         iwl_activate_qos(priv, 0);
7210 #endif /* CONFIG_IWLWIFI_QOS */
7211         mutex_unlock(&priv->mutex);
7212 }
7213
7214 static void iwl_bg_abort_scan(struct work_struct *work)
7215 {
7216         struct iwl_priv *priv = container_of(work, struct iwl_priv,
7217                                              abort_scan);
7218
7219         if (!iwl_is_ready(priv))
7220                 return;
7221
7222         mutex_lock(&priv->mutex);
7223
7224         set_bit(STATUS_SCAN_ABORTING, &priv->status);
7225         iwl_send_scan_abort(priv);
7226
7227         mutex_unlock(&priv->mutex);
7228 }
7229
7230 static void iwl_bg_scan_completed(struct work_struct *work)
7231 {
7232         struct iwl_priv *priv =
7233             container_of(work, struct iwl_priv, scan_completed);
7234
7235         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7236
7237         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7238                 return;
7239
7240         ieee80211_scan_completed(priv->hw);
7241
7242         /* Since setting the TXPOWER may have been deferred while
7243          * performing the scan, fire one off */
7244         mutex_lock(&priv->mutex);
7245         iwl_hw_reg_send_txpower(priv);
7246         mutex_unlock(&priv->mutex);
7247 }
7248
7249 /*****************************************************************************
7250  *
7251  * mac80211 entry point functions
7252  *
7253  *****************************************************************************/
7254
7255 static int iwl_mac_start(struct ieee80211_hw *hw)
7256 {
7257         struct iwl_priv *priv = hw->priv;
7258
7259         IWL_DEBUG_MAC80211("enter\n");
7260
7261         /* we should be verifying the device is ready to be opened */
7262         mutex_lock(&priv->mutex);
7263
7264         priv->is_open = 1;
7265
7266         if (!iwl_is_rfkill(priv))
7267                 ieee80211_start_queues(priv->hw);
7268
7269         mutex_unlock(&priv->mutex);
7270         IWL_DEBUG_MAC80211("leave\n");
7271         return 0;
7272 }
7273
7274 static void iwl_mac_stop(struct ieee80211_hw *hw)
7275 {
7276         struct iwl_priv *priv = hw->priv;
7277
7278         IWL_DEBUG_MAC80211("enter\n");
7279         priv->is_open = 0;
7280         /*netif_stop_queue(dev); */
7281         flush_workqueue(priv->workqueue);
7282         IWL_DEBUG_MAC80211("leave\n");
7283 }
7284
7285 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7286                       struct ieee80211_tx_control *ctl)
7287 {
7288         struct iwl_priv *priv = hw->priv;
7289
7290         IWL_DEBUG_MAC80211("enter\n");
7291
7292         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7293                 IWL_DEBUG_MAC80211("leave - monitor\n");
7294                 return -1;
7295         }
7296
7297         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7298                      ctl->tx_rate);
7299
7300         if (iwl_tx_skb(priv, skb, ctl))
7301                 dev_kfree_skb_any(skb);
7302
7303         IWL_DEBUG_MAC80211("leave\n");
7304         return 0;
7305 }
7306
7307 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
7308                                  struct ieee80211_if_init_conf *conf)
7309 {
7310         struct iwl_priv *priv = hw->priv;
7311         unsigned long flags;
7312         DECLARE_MAC_BUF(mac);
7313
7314         IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7315         if (conf->mac_addr)
7316                 IWL_DEBUG_MAC80211("enter: MAC %s\n",
7317                                    print_mac(mac, conf->mac_addr));
7318
7319         if (priv->interface_id) {
7320                 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7321                 return 0;
7322         }
7323
7324         spin_lock_irqsave(&priv->lock, flags);
7325         priv->interface_id = conf->if_id;
7326
7327         spin_unlock_irqrestore(&priv->lock, flags);
7328
7329         mutex_lock(&priv->mutex);
7330         iwl_set_mode(priv, conf->type);
7331
7332         IWL_DEBUG_MAC80211("leave\n");
7333         mutex_unlock(&priv->mutex);
7334
7335         return 0;
7336 }
7337
7338 /**
7339  * iwl_mac_config - mac80211 config callback
7340  *
7341  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7342  * be set inappropriately and the driver currently sets the hardware up to
7343  * use it whenever needed.
7344  */
7345 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7346 {
7347         struct iwl_priv *priv = hw->priv;
7348         const struct iwl_channel_info *ch_info;
7349         unsigned long flags;
7350
7351         mutex_lock(&priv->mutex);
7352         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7353
7354         if (!iwl_is_ready(priv)) {
7355                 IWL_DEBUG_MAC80211("leave - not ready\n");
7356                 mutex_unlock(&priv->mutex);
7357                 return -EIO;
7358         }
7359
7360         /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7361          * what is exposed through include/ declrations */
7362         if (unlikely(!iwl_param_disable_hw_scan &&
7363                      test_bit(STATUS_SCANNING, &priv->status))) {
7364                 IWL_DEBUG_MAC80211("leave - scanning\n");
7365                 mutex_unlock(&priv->mutex);
7366                 return 0;
7367         }
7368
7369         spin_lock_irqsave(&priv->lock, flags);
7370
7371         ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7372         if (!is_channel_valid(ch_info)) {
7373                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7374                                conf->channel, conf->phymode);
7375                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7376                 spin_unlock_irqrestore(&priv->lock, flags);
7377                 mutex_unlock(&priv->mutex);
7378                 return -EINVAL;
7379         }
7380
7381 #ifdef CONFIG_IWLWIFI_HT
7382         /* if we are switching fron ht to 2.4 clear flags
7383          * from any ht related info since 2.4 does not
7384          * support ht */
7385         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7386 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7387             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7388 #endif
7389         )
7390                 priv->staging_rxon.flags = 0;
7391 #endif /* CONFIG_IWLWIFI_HT */
7392
7393         iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7394
7395         iwl_set_flags_for_phymode(priv, conf->phymode);
7396
7397         /* The list of supported rates and rate mask can be different
7398          * for each phymode; since the phymode may have changed, reset
7399          * the rate mask to what mac80211 lists */
7400         iwl_set_rate(priv);
7401
7402         spin_unlock_irqrestore(&priv->lock, flags);
7403
7404 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7405         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7406                 iwl_hw_channel_switch(priv, conf->channel);
7407                 mutex_unlock(&priv->mutex);
7408                 return 0;
7409         }
7410 #endif
7411
7412         iwl_radio_kill_sw(priv, !conf->radio_enabled);
7413
7414         if (!conf->radio_enabled) {
7415                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7416                 mutex_unlock(&priv->mutex);
7417                 return 0;
7418         }
7419
7420         if (iwl_is_rfkill(priv)) {
7421                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7422                 mutex_unlock(&priv->mutex);
7423                 return -EIO;
7424         }
7425
7426         iwl_set_rate(priv);
7427
7428         if (memcmp(&priv->active_rxon,
7429                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7430                 iwl_commit_rxon(priv);
7431         else
7432                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7433
7434         IWL_DEBUG_MAC80211("leave\n");
7435
7436         mutex_unlock(&priv->mutex);
7437
7438         return 0;
7439 }
7440
7441 static void iwl_config_ap(struct iwl_priv *priv)
7442 {
7443         int rc = 0;
7444
7445         if (priv->status & STATUS_EXIT_PENDING)
7446                 return;
7447
7448         /* The following should be done only at AP bring up */
7449         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7450
7451                 /* RXON - unassoc (to set timing command) */
7452                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7453                 iwl_commit_rxon(priv);
7454
7455                 /* RXON Timing */
7456                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7457                 iwl_setup_rxon_timing(priv);
7458                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7459                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7460                 if (rc)
7461                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7462                                         "Attempting to continue.\n");
7463
7464                 iwl4965_set_rxon_chain(priv);
7465
7466                 /* FIXME: what should be the assoc_id for AP? */
7467                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7468                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7469                         priv->staging_rxon.flags |=
7470                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7471                 else
7472                         priv->staging_rxon.flags &=
7473                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7474
7475                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7476                         if (priv->assoc_capability &
7477                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7478                                 priv->staging_rxon.flags |=
7479                                         RXON_FLG_SHORT_SLOT_MSK;
7480                         else
7481                                 priv->staging_rxon.flags &=
7482                                         ~RXON_FLG_SHORT_SLOT_MSK;
7483
7484                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7485                                 priv->staging_rxon.flags &=
7486                                         ~RXON_FLG_SHORT_SLOT_MSK;
7487                 }
7488                 /* restore RXON assoc */
7489                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7490                 iwl_commit_rxon(priv);
7491 #ifdef CONFIG_IWLWIFI_QOS
7492                 iwl_activate_qos(priv, 1);
7493 #endif
7494                 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7495                 iwl_send_beacon_cmd(priv);
7496         } else
7497                 iwl_send_beacon_cmd(priv);
7498
7499         /* FIXME - we need to add code here to detect a totally new
7500          * configuration, reset the AP, unassoc, rxon timing, assoc,
7501          * clear sta table, add BCAST sta... */
7502 }
7503
7504 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7505                                     struct ieee80211_if_conf *conf)
7506 {
7507         struct iwl_priv *priv = hw->priv;
7508         DECLARE_MAC_BUF(mac);
7509         unsigned long flags;
7510         int rc;
7511
7512         if (conf == NULL)
7513                 return -EIO;
7514
7515         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7516             (!conf->beacon || !conf->ssid_len)) {
7517                 IWL_DEBUG_MAC80211
7518                     ("Leaving in AP mode because HostAPD is not ready.\n");
7519                 return 0;
7520         }
7521
7522         mutex_lock(&priv->mutex);
7523
7524         IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7525         if (conf->bssid)
7526                 IWL_DEBUG_MAC80211("bssid: %s\n",
7527                                    print_mac(mac, conf->bssid));
7528
7529 /*
7530  * very dubious code was here; the probe filtering flag is never set:
7531  *
7532         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7533             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7534  */
7535         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7536                 IWL_DEBUG_MAC80211("leave - scanning\n");
7537                 mutex_unlock(&priv->mutex);
7538                 return 0;
7539         }
7540
7541         if (priv->interface_id != if_id) {
7542                 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7543                 mutex_unlock(&priv->mutex);
7544                 return 0;
7545         }
7546
7547         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7548                 if (!conf->bssid) {
7549                         conf->bssid = priv->mac_addr;
7550                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7551                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7552                                            print_mac(mac, conf->bssid));
7553                 }
7554                 if (priv->ibss_beacon)
7555                         dev_kfree_skb(priv->ibss_beacon);
7556
7557                 priv->ibss_beacon = conf->beacon;
7558         }
7559
7560         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7561             !is_multicast_ether_addr(conf->bssid)) {
7562                 /* If there is currently a HW scan going on in the background
7563                  * then we need to cancel it else the RXON below will fail. */
7564                 if (iwl_scan_cancel_timeout(priv, 100)) {
7565                         IWL_WARNING("Aborted scan still in progress "
7566                                     "after 100ms\n");
7567                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7568                         mutex_unlock(&priv->mutex);
7569                         return -EAGAIN;
7570                 }
7571                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7572
7573                 /* TODO: Audit driver for usage of these members and see
7574                  * if mac80211 deprecates them (priv->bssid looks like it
7575                  * shouldn't be there, but I haven't scanned the IBSS code
7576                  * to verify) - jpk */
7577                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7578
7579                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7580                         iwl_config_ap(priv);
7581                 else {
7582                         priv->staging_rxon.filter_flags |=
7583                                                 RXON_FILTER_ASSOC_MSK;
7584                         rc = iwl_commit_rxon(priv);
7585                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7586                                 iwl_rxon_add_station(
7587                                         priv, priv->active_rxon.bssid_addr, 1);
7588                 }
7589
7590         } else {
7591                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7592                 iwl_commit_rxon(priv);
7593         }
7594
7595         spin_lock_irqsave(&priv->lock, flags);
7596         if (!conf->ssid_len)
7597                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7598         else
7599                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7600
7601         priv->essid_len = conf->ssid_len;
7602         spin_unlock_irqrestore(&priv->lock, flags);
7603
7604         IWL_DEBUG_MAC80211("leave\n");
7605         mutex_unlock(&priv->mutex);
7606
7607         return 0;
7608 }
7609
7610 static void iwl_configure_filter(struct ieee80211_hw *hw,
7611                                  unsigned int changed_flags,
7612                                  unsigned int *total_flags,
7613                                  int mc_count, struct dev_addr_list *mc_list)
7614 {
7615         /*
7616          * XXX: dummy
7617          * see also iwl_connection_init_rx_config
7618          */
7619         *total_flags = 0;
7620 }
7621
7622 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7623                                      struct ieee80211_if_init_conf *conf)
7624 {
7625         struct iwl_priv *priv = hw->priv;
7626
7627         IWL_DEBUG_MAC80211("enter\n");
7628
7629         mutex_lock(&priv->mutex);
7630         if (priv->interface_id == conf->if_id) {
7631                 priv->interface_id = 0;
7632                 memset(priv->bssid, 0, ETH_ALEN);
7633                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7634                 priv->essid_len = 0;
7635         }
7636         mutex_unlock(&priv->mutex);
7637
7638         IWL_DEBUG_MAC80211("leave\n");
7639
7640 }
7641
7642 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7643 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7644 {
7645         int rc = 0;
7646         unsigned long flags;
7647         struct iwl_priv *priv = hw->priv;
7648
7649         IWL_DEBUG_MAC80211("enter\n");
7650
7651         spin_lock_irqsave(&priv->lock, flags);
7652
7653         if (!iwl_is_ready_rf(priv)) {
7654                 rc = -EIO;
7655                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7656                 goto out_unlock;
7657         }
7658
7659         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7660                 rc = -EIO;
7661                 IWL_ERROR("ERROR: APs don't scan\n");
7662                 goto out_unlock;
7663         }
7664
7665         /* if we just finished scan ask for delay */
7666         if (priv->last_scan_jiffies &&
7667             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7668                        jiffies)) {
7669                 rc = -EAGAIN;
7670                 goto out_unlock;
7671         }
7672         if (len) {
7673                 IWL_DEBUG_SCAN("direct scan for  "
7674                                "%s [%d]\n ",
7675                                iwl_escape_essid(ssid, len), (int)len);
7676
7677                 priv->one_direct_scan = 1;
7678                 priv->direct_ssid_len = (u8)
7679                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7680                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7681         }
7682
7683         rc = iwl_scan_initiate(priv);
7684
7685         IWL_DEBUG_MAC80211("leave\n");
7686
7687 out_unlock:
7688         spin_unlock_irqrestore(&priv->lock, flags);
7689
7690         return rc;
7691 }
7692
7693 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7694                            const u8 *local_addr, const u8 *addr,
7695                            struct ieee80211_key_conf *key)
7696 {
7697         struct iwl_priv *priv = hw->priv;
7698         DECLARE_MAC_BUF(mac);
7699         int rc = 0;
7700         u8 sta_id;
7701
7702         IWL_DEBUG_MAC80211("enter\n");
7703
7704         if (!iwl_param_hwcrypto) {
7705                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7706                 return -EOPNOTSUPP;
7707         }
7708
7709         if (is_zero_ether_addr(addr))
7710                 /* only support pairwise keys */
7711                 return -EOPNOTSUPP;
7712
7713         sta_id = iwl_hw_find_station(priv, addr);
7714         if (sta_id == IWL_INVALID_STATION) {
7715                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7716                                    print_mac(mac, addr));
7717                 return -EINVAL;
7718         }
7719
7720         mutex_lock(&priv->mutex);
7721
7722         switch (cmd) {
7723         case  SET_KEY:
7724                 rc = iwl_update_sta_key_info(priv, key, sta_id);
7725                 if (!rc) {
7726                         iwl_set_rxon_hwcrypto(priv, 1);
7727                         iwl_commit_rxon(priv);
7728                         key->hw_key_idx = sta_id;
7729                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7730                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7731                 }
7732                 break;
7733         case DISABLE_KEY:
7734                 rc = iwl_clear_sta_key_info(priv, sta_id);
7735                 if (!rc) {
7736                         iwl_set_rxon_hwcrypto(priv, 0);
7737                         iwl_commit_rxon(priv);
7738                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7739                 }
7740                 break;
7741         default:
7742                 rc = -EINVAL;
7743         }
7744
7745         IWL_DEBUG_MAC80211("leave\n");
7746         mutex_unlock(&priv->mutex);
7747
7748         return rc;
7749 }
7750
7751 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7752                            const struct ieee80211_tx_queue_params *params)
7753 {
7754         struct iwl_priv *priv = hw->priv;
7755 #ifdef CONFIG_IWLWIFI_QOS
7756         unsigned long flags;
7757         int q;
7758 #endif /* CONFIG_IWL_QOS */
7759
7760         IWL_DEBUG_MAC80211("enter\n");
7761
7762         if (!iwl_is_ready_rf(priv)) {
7763                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7764                 return -EIO;
7765         }
7766
7767         if (queue >= AC_NUM) {
7768                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7769                 return 0;
7770         }
7771
7772 #ifdef CONFIG_IWLWIFI_QOS
7773         if (!priv->qos_data.qos_enable) {
7774                 priv->qos_data.qos_active = 0;
7775                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7776                 return 0;
7777         }
7778         q = AC_NUM - 1 - queue;
7779
7780         spin_lock_irqsave(&priv->lock, flags);
7781
7782         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7783         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7784         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7785         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7786                         cpu_to_le16((params->burst_time * 100));
7787
7788         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7789         priv->qos_data.qos_active = 1;
7790
7791         spin_unlock_irqrestore(&priv->lock, flags);
7792
7793         mutex_lock(&priv->mutex);
7794         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7795                 iwl_activate_qos(priv, 1);
7796         else if (priv->assoc_id && iwl_is_associated(priv))
7797                 iwl_activate_qos(priv, 0);
7798
7799         mutex_unlock(&priv->mutex);
7800
7801 #endif /*CONFIG_IWLWIFI_QOS */
7802
7803         IWL_DEBUG_MAC80211("leave\n");
7804         return 0;
7805 }
7806
7807 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7808                                 struct ieee80211_tx_queue_stats *stats)
7809 {
7810         struct iwl_priv *priv = hw->priv;
7811         int i, avail;
7812         struct iwl_tx_queue *txq;
7813         struct iwl_queue *q;
7814         unsigned long flags;
7815
7816         IWL_DEBUG_MAC80211("enter\n");
7817
7818         if (!iwl_is_ready_rf(priv)) {
7819                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7820                 return -EIO;
7821         }
7822
7823         spin_lock_irqsave(&priv->lock, flags);
7824
7825         for (i = 0; i < AC_NUM; i++) {
7826                 txq = &priv->txq[i];
7827                 q = &txq->q;
7828                 avail = iwl_queue_space(q);
7829
7830                 stats->data[i].len = q->n_window - avail;
7831                 stats->data[i].limit = q->n_window - q->high_mark;
7832                 stats->data[i].count = q->n_window;
7833
7834         }
7835         spin_unlock_irqrestore(&priv->lock, flags);
7836
7837         IWL_DEBUG_MAC80211("leave\n");
7838
7839         return 0;
7840 }
7841
7842 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7843                              struct ieee80211_low_level_stats *stats)
7844 {
7845         IWL_DEBUG_MAC80211("enter\n");
7846         IWL_DEBUG_MAC80211("leave\n");
7847
7848         return 0;
7849 }
7850
7851 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7852 {
7853         IWL_DEBUG_MAC80211("enter\n");
7854         IWL_DEBUG_MAC80211("leave\n");
7855
7856         return 0;
7857 }
7858
7859 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7860 {
7861         struct iwl_priv *priv = hw->priv;
7862         unsigned long flags;
7863
7864         mutex_lock(&priv->mutex);
7865         IWL_DEBUG_MAC80211("enter\n");
7866
7867         priv->lq_mngr.lq_ready = 0;
7868 #ifdef CONFIG_IWLWIFI_HT
7869         spin_lock_irqsave(&priv->lock, flags);
7870         memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
7871         spin_unlock_irqrestore(&priv->lock, flags);
7872 #ifdef CONFIG_IWLWIFI_HT_AGG
7873 /*      if (priv->lq_mngr.agg_ctrl.granted_ba)
7874                 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
7875
7876         memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl_agg_control));
7877         priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
7878         priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
7879         priv->lq_mngr.agg_ctrl.auto_agg = 1;
7880
7881         if (priv->lq_mngr.agg_ctrl.auto_agg)
7882                 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
7883 #endif /*CONFIG_IWLWIFI_HT_AGG */
7884 #endif /* CONFIG_IWLWIFI_HT */
7885
7886 #ifdef CONFIG_IWLWIFI_QOS
7887         iwl_reset_qos(priv);
7888 #endif
7889
7890         cancel_delayed_work(&priv->post_associate);
7891
7892         spin_lock_irqsave(&priv->lock, flags);
7893         priv->assoc_id = 0;
7894         priv->assoc_capability = 0;
7895         priv->call_post_assoc_from_beacon = 0;
7896         priv->assoc_station_added = 0;
7897
7898         /* new association get rid of ibss beacon skb */
7899         if (priv->ibss_beacon)
7900                 dev_kfree_skb(priv->ibss_beacon);
7901
7902         priv->ibss_beacon = NULL;
7903
7904         priv->beacon_int = priv->hw->conf.beacon_int;
7905         priv->timestamp1 = 0;
7906         priv->timestamp0 = 0;
7907         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7908                 priv->beacon_int = 0;
7909
7910         spin_unlock_irqrestore(&priv->lock, flags);
7911
7912         /* Per mac80211.h: This is only used in IBSS mode... */
7913         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7914                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7915                 mutex_unlock(&priv->mutex);
7916                 return;
7917         }
7918
7919         if (!iwl_is_ready_rf(priv)) {
7920                 IWL_DEBUG_MAC80211("leave - not ready\n");
7921                 mutex_unlock(&priv->mutex);
7922                 return;
7923         }
7924
7925         priv->only_active_channel = 0;
7926
7927         iwl_set_rate(priv);
7928
7929         mutex_unlock(&priv->mutex);
7930
7931         IWL_DEBUG_MAC80211("leave\n");
7932
7933 }
7934
7935 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7936                                  struct ieee80211_tx_control *control)
7937 {
7938         struct iwl_priv *priv = hw->priv;
7939         unsigned long flags;
7940
7941         mutex_lock(&priv->mutex);
7942         IWL_DEBUG_MAC80211("enter\n");
7943
7944         if (!iwl_is_ready_rf(priv)) {
7945                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7946                 mutex_unlock(&priv->mutex);
7947                 return -EIO;
7948         }
7949
7950         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7951                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7952                 mutex_unlock(&priv->mutex);
7953                 return -EIO;
7954         }
7955
7956         spin_lock_irqsave(&priv->lock, flags);
7957
7958         if (priv->ibss_beacon)
7959                 dev_kfree_skb(priv->ibss_beacon);
7960
7961         priv->ibss_beacon = skb;
7962
7963         priv->assoc_id = 0;
7964
7965         IWL_DEBUG_MAC80211("leave\n");
7966         spin_unlock_irqrestore(&priv->lock, flags);
7967
7968 #ifdef CONFIG_IWLWIFI_QOS
7969         iwl_reset_qos(priv);
7970 #endif
7971
7972         queue_work(priv->workqueue, &priv->post_associate.work);
7973
7974         mutex_unlock(&priv->mutex);
7975
7976         return 0;
7977 }
7978
7979 #ifdef CONFIG_IWLWIFI_HT
7980 union ht_cap_info {
7981         struct {
7982                 u16 advanced_coding_cap         :1;
7983                 u16 supported_chan_width_set    :1;
7984                 u16 mimo_power_save_mode        :2;
7985                 u16 green_field                 :1;
7986                 u16 short_GI20                  :1;
7987                 u16 short_GI40                  :1;
7988                 u16 tx_stbc                     :1;
7989                 u16 rx_stbc                     :1;
7990                 u16 beam_forming                :1;
7991                 u16 delayed_ba                  :1;
7992                 u16 maximal_amsdu_size          :1;
7993                 u16 cck_mode_at_40MHz           :1;
7994                 u16 psmp_support                :1;
7995                 u16 stbc_ctrl_frame_support     :1;
7996                 u16 sig_txop_protection_support :1;
7997         };
7998         u16 val;
7999 } __attribute__ ((packed));
8000
8001 union ht_param_info{
8002         struct {
8003                 u8 max_rx_ampdu_factor  :2;
8004                 u8 mpdu_density         :3;
8005                 u8 reserved             :3;
8006         };
8007         u8 val;
8008 } __attribute__ ((packed));
8009
8010 union ht_exra_param_info {
8011         struct {
8012                 u8 ext_chan_offset              :2;
8013                 u8 tx_chan_width                :1;
8014                 u8 rifs_mode                    :1;
8015                 u8 controlled_access_only       :1;
8016                 u8 service_interval_granularity :3;
8017         };
8018         u8 val;
8019 } __attribute__ ((packed));
8020
8021 union ht_operation_mode{
8022         struct {
8023                 u16 op_mode     :2;
8024                 u16 non_GF      :1;
8025                 u16 reserved    :13;
8026         };
8027         u16 val;
8028 } __attribute__ ((packed));
8029
8030
8031 static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
8032                             struct ieee80211_ht_additional_info *ht_extra,
8033                             struct sta_ht_info *ht_info_ap,
8034                             struct sta_ht_info *ht_info)
8035 {
8036         union ht_cap_info cap;
8037         union ht_operation_mode op_mode;
8038         union ht_param_info param_info;
8039         union ht_exra_param_info extra_param_info;
8040
8041         IWL_DEBUG_MAC80211("enter: \n");
8042
8043         if (!ht_info) {
8044                 IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
8045                 return -1;
8046         }
8047
8048         if (ht_cap) {
8049                 cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
8050                 param_info.val = ht_cap->mac_ht_params_info;
8051                 ht_info->is_ht = 1;
8052                 if (cap.short_GI20)
8053                         ht_info->sgf |= 0x1;
8054                 if (cap.short_GI40)
8055                         ht_info->sgf |= 0x2;
8056                 ht_info->is_green_field = cap.green_field;
8057                 ht_info->max_amsdu_size = cap.maximal_amsdu_size;
8058                 ht_info->supported_chan_width = cap.supported_chan_width_set;
8059                 ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
8060                 memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
8061
8062                 ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
8063                 ht_info->mpdu_density = param_info.mpdu_density;
8064
8065                 IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
8066                                     ht_cap->supported_mcs_set[0],
8067                                     ht_cap->supported_mcs_set[1]);
8068
8069                 if (ht_info_ap) {
8070                         ht_info->control_channel = ht_info_ap->control_channel;
8071                         ht_info->extension_chan_offset =
8072                                 ht_info_ap->extension_chan_offset;
8073                         ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
8074                         ht_info->operating_mode = ht_info_ap->operating_mode;
8075                 }
8076
8077                 if (ht_extra) {
8078                         extra_param_info.val = ht_extra->ht_param;
8079                         ht_info->control_channel = ht_extra->control_chan;
8080                         ht_info->extension_chan_offset =
8081                             extra_param_info.ext_chan_offset;
8082                         ht_info->tx_chan_width = extra_param_info.tx_chan_width;
8083                         op_mode.val = (u16)
8084                             le16_to_cpu(ht_extra->operation_mode);
8085                         ht_info->operating_mode = op_mode.op_mode;
8086                         IWL_DEBUG_MAC80211("control channel %d\n",
8087                                             ht_extra->control_chan);
8088                 }
8089         } else
8090                 ht_info->is_ht = 0;
8091
8092         IWL_DEBUG_MAC80211("leave\n");
8093         return 0;
8094 }
8095
8096 static int iwl_mac_conf_ht(struct ieee80211_hw *hw,
8097                            struct ieee80211_ht_capability *ht_cap,
8098                            struct ieee80211_ht_additional_info *ht_extra)
8099 {
8100         struct iwl_priv *priv = hw->priv;
8101         int rs;
8102
8103         IWL_DEBUG_MAC80211("enter: \n");
8104
8105         rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
8106         iwl4965_set_rxon_chain(priv);
8107
8108         if (priv && priv->assoc_id &&
8109             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8110                 unsigned long flags;
8111
8112                 spin_lock_irqsave(&priv->lock, flags);
8113                 if (priv->beacon_int)
8114                         queue_work(priv->workqueue, &priv->post_associate.work);
8115                 else
8116                         priv->call_post_assoc_from_beacon = 1;
8117                 spin_unlock_irqrestore(&priv->lock, flags);
8118         }
8119
8120         IWL_DEBUG_MAC80211("leave: control channel %d\n",
8121                         ht_extra->control_chan);
8122         return rs;
8123
8124 }
8125
8126 static void iwl_set_ht_capab(struct ieee80211_hw *hw,
8127                              struct ieee80211_ht_capability *ht_cap,
8128                              u8 use_wide_chan)
8129 {
8130         union ht_cap_info cap;
8131         union ht_param_info param_info;
8132
8133         memset(&cap, 0, sizeof(union ht_cap_info));
8134         memset(&param_info, 0, sizeof(union ht_param_info));
8135
8136         cap.maximal_amsdu_size = HT_IE_MAX_AMSDU_SIZE_4K;
8137         cap.green_field = 1;
8138         cap.short_GI20 = 1;
8139         cap.short_GI40 = 1;
8140         cap.supported_chan_width_set = use_wide_chan;
8141         cap.mimo_power_save_mode = 0x3;
8142
8143         param_info.max_rx_ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
8144         param_info.mpdu_density = CFG_HT_MPDU_DENSITY_DEF;
8145         ht_cap->capabilities_info = (__le16) cpu_to_le16(cap.val);
8146         ht_cap->mac_ht_params_info = (u8) param_info.val;
8147
8148         ht_cap->supported_mcs_set[0] = 0xff;
8149         ht_cap->supported_mcs_set[1] = 0xff;
8150         ht_cap->supported_mcs_set[4] =
8151             (cap.supported_chan_width_set) ? 0x1: 0x0;
8152 }
8153
8154 static void iwl_mac_get_ht_capab(struct ieee80211_hw *hw,
8155                                  struct ieee80211_ht_capability *ht_cap)
8156 {
8157         u8 use_wide_channel = 1;
8158         struct iwl_priv *priv = hw->priv;
8159
8160         IWL_DEBUG_MAC80211("enter: \n");
8161         if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
8162                 use_wide_channel = 0;
8163
8164         /* no fat tx allowed on 2.4GHZ */
8165         if (priv->phymode != MODE_IEEE80211A)
8166                 use_wide_channel = 0;
8167
8168         iwl_set_ht_capab(hw, ht_cap, use_wide_channel);
8169         IWL_DEBUG_MAC80211("leave: \n");
8170 }
8171 #endif /*CONFIG_IWLWIFI_HT*/
8172
8173 /*****************************************************************************
8174  *
8175  * sysfs attributes
8176  *
8177  *****************************************************************************/
8178
8179 #ifdef CONFIG_IWLWIFI_DEBUG
8180
8181 /*
8182  * The following adds a new attribute to the sysfs representation
8183  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8184  * used for controlling the debug level.
8185  *
8186  * See the level definitions in iwl for details.
8187  */
8188
8189 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8190 {
8191         return sprintf(buf, "0x%08X\n", iwl_debug_level);
8192 }
8193 static ssize_t store_debug_level(struct device_driver *d,
8194                                  const char *buf, size_t count)
8195 {
8196         char *p = (char *)buf;
8197         u32 val;
8198
8199         val = simple_strtoul(p, &p, 0);
8200         if (p == buf)
8201                 printk(KERN_INFO DRV_NAME
8202                        ": %s is not in hex or decimal form.\n", buf);
8203         else
8204                 iwl_debug_level = val;
8205
8206         return strnlen(buf, count);
8207 }
8208
8209 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8210                    show_debug_level, store_debug_level);
8211
8212 #endif /* CONFIG_IWLWIFI_DEBUG */
8213
8214 static ssize_t show_rf_kill(struct device *d,
8215                             struct device_attribute *attr, char *buf)
8216 {
8217         /*
8218          * 0 - RF kill not enabled
8219          * 1 - SW based RF kill active (sysfs)
8220          * 2 - HW based RF kill active
8221          * 3 - Both HW and SW based RF kill active
8222          */
8223         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8224         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8225                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8226
8227         return sprintf(buf, "%i\n", val);
8228 }
8229
8230 static ssize_t store_rf_kill(struct device *d,
8231                              struct device_attribute *attr,
8232                              const char *buf, size_t count)
8233 {
8234         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8235
8236         mutex_lock(&priv->mutex);
8237         iwl_radio_kill_sw(priv, buf[0] == '1');
8238         mutex_unlock(&priv->mutex);
8239
8240         return count;
8241 }
8242
8243 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8244
8245 static ssize_t show_temperature(struct device *d,
8246                                 struct device_attribute *attr, char *buf)
8247 {
8248         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8249
8250         if (!iwl_is_alive(priv))
8251                 return -EAGAIN;
8252
8253         return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
8254 }
8255
8256 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8257
8258 static ssize_t show_rs_window(struct device *d,
8259                               struct device_attribute *attr,
8260                               char *buf)
8261 {
8262         struct iwl_priv *priv = d->driver_data;
8263         return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8264 }
8265 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8266
8267 static ssize_t show_tx_power(struct device *d,
8268                              struct device_attribute *attr, char *buf)
8269 {
8270         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8271         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8272 }
8273
8274 static ssize_t store_tx_power(struct device *d,
8275                               struct device_attribute *attr,
8276                               const char *buf, size_t count)
8277 {
8278         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8279         char *p = (char *)buf;
8280         u32 val;
8281
8282         val = simple_strtoul(p, &p, 10);
8283         if (p == buf)
8284                 printk(KERN_INFO DRV_NAME
8285                        ": %s is not in decimal form.\n", buf);
8286         else
8287                 iwl_hw_reg_set_txpower(priv, val);
8288
8289         return count;
8290 }
8291
8292 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8293
8294 static ssize_t show_flags(struct device *d,
8295                           struct device_attribute *attr, char *buf)
8296 {
8297         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8298
8299         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8300 }
8301
8302 static ssize_t store_flags(struct device *d,
8303                            struct device_attribute *attr,
8304                            const char *buf, size_t count)
8305 {
8306         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8307         u32 flags = simple_strtoul(buf, NULL, 0);
8308
8309         mutex_lock(&priv->mutex);
8310         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8311                 /* Cancel any currently running scans... */
8312                 if (iwl_scan_cancel_timeout(priv, 100))
8313                         IWL_WARNING("Could not cancel scan.\n");
8314                 else {
8315                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8316                                        flags);
8317                         priv->staging_rxon.flags = cpu_to_le32(flags);
8318                         iwl_commit_rxon(priv);
8319                 }
8320         }
8321         mutex_unlock(&priv->mutex);
8322
8323         return count;
8324 }
8325
8326 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8327
8328 static ssize_t show_filter_flags(struct device *d,
8329                                  struct device_attribute *attr, char *buf)
8330 {
8331         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8332
8333         return sprintf(buf, "0x%04X\n",
8334                 le32_to_cpu(priv->active_rxon.filter_flags));
8335 }
8336
8337 static ssize_t store_filter_flags(struct device *d,
8338                                   struct device_attribute *attr,
8339                                   const char *buf, size_t count)
8340 {
8341         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8342         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8343
8344         mutex_lock(&priv->mutex);
8345         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8346                 /* Cancel any currently running scans... */
8347                 if (iwl_scan_cancel_timeout(priv, 100))
8348                         IWL_WARNING("Could not cancel scan.\n");
8349                 else {
8350                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8351                                        "0x%04X\n", filter_flags);
8352                         priv->staging_rxon.filter_flags =
8353                                 cpu_to_le32(filter_flags);
8354                         iwl_commit_rxon(priv);
8355                 }
8356         }
8357         mutex_unlock(&priv->mutex);
8358
8359         return count;
8360 }
8361
8362 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8363                    store_filter_flags);
8364
8365 static ssize_t show_tune(struct device *d,
8366                          struct device_attribute *attr, char *buf)
8367 {
8368         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8369
8370         return sprintf(buf, "0x%04X\n",
8371                        (priv->phymode << 8) |
8372                         le16_to_cpu(priv->active_rxon.channel));
8373 }
8374
8375 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
8376
8377 static ssize_t store_tune(struct device *d,
8378                           struct device_attribute *attr,
8379                           const char *buf, size_t count)
8380 {
8381         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8382         char *p = (char *)buf;
8383         u16 tune = simple_strtoul(p, &p, 0);
8384         u8 phymode = (tune >> 8) & 0xff;
8385         u16 channel = tune & 0xff;
8386
8387         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8388
8389         mutex_lock(&priv->mutex);
8390         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8391             (priv->phymode != phymode)) {
8392                 const struct iwl_channel_info *ch_info;
8393
8394                 ch_info = iwl_get_channel_info(priv, phymode, channel);
8395                 if (!ch_info) {
8396                         IWL_WARNING("Requested invalid phymode/channel "
8397                                     "combination: %d %d\n", phymode, channel);
8398                         mutex_unlock(&priv->mutex);
8399                         return -EINVAL;
8400                 }
8401
8402                 /* Cancel any currently running scans... */
8403                 if (iwl_scan_cancel_timeout(priv, 100))
8404                         IWL_WARNING("Could not cancel scan.\n");
8405                 else {
8406                         IWL_DEBUG_INFO("Committing phymode and "
8407                                        "rxon.channel = %d %d\n",
8408                                        phymode, channel);
8409
8410                         iwl_set_rxon_channel(priv, phymode, channel);
8411                         iwl_set_flags_for_phymode(priv, phymode);
8412
8413                         iwl_set_rate(priv);
8414                         iwl_commit_rxon(priv);
8415                 }
8416         }
8417         mutex_unlock(&priv->mutex);
8418
8419         return count;
8420 }
8421
8422 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8423
8424 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8425
8426 static ssize_t show_measurement(struct device *d,
8427                                 struct device_attribute *attr, char *buf)
8428 {
8429         struct iwl_priv *priv = dev_get_drvdata(d);
8430         struct iwl_spectrum_notification measure_report;
8431         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8432         u8 *data = (u8 *) & measure_report;
8433         unsigned long flags;
8434
8435         spin_lock_irqsave(&priv->lock, flags);
8436         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8437                 spin_unlock_irqrestore(&priv->lock, flags);
8438                 return 0;
8439         }
8440         memcpy(&measure_report, &priv->measure_report, size);
8441         priv->measurement_status = 0;
8442         spin_unlock_irqrestore(&priv->lock, flags);
8443
8444         while (size && (PAGE_SIZE - len)) {
8445                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8446                                    PAGE_SIZE - len, 1);
8447                 len = strlen(buf);
8448                 if (PAGE_SIZE - len)
8449                         buf[len++] = '\n';
8450
8451                 ofs += 16;
8452                 size -= min(size, 16U);
8453         }
8454
8455         return len;
8456 }
8457
8458 static ssize_t store_measurement(struct device *d,
8459                                  struct device_attribute *attr,
8460                                  const char *buf, size_t count)
8461 {
8462         struct iwl_priv *priv = dev_get_drvdata(d);
8463         struct ieee80211_measurement_params params = {
8464                 .channel = le16_to_cpu(priv->active_rxon.channel),
8465                 .start_time = cpu_to_le64(priv->last_tsf),
8466                 .duration = cpu_to_le16(1),
8467         };
8468         u8 type = IWL_MEASURE_BASIC;
8469         u8 buffer[32];
8470         u8 channel;
8471
8472         if (count) {
8473                 char *p = buffer;
8474                 strncpy(buffer, buf, min(sizeof(buffer), count));
8475                 channel = simple_strtoul(p, NULL, 0);
8476                 if (channel)
8477                         params.channel = channel;
8478
8479                 p = buffer;
8480                 while (*p && *p != ' ')
8481                         p++;
8482                 if (*p)
8483                         type = simple_strtoul(p + 1, NULL, 0);
8484         }
8485
8486         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8487                        "channel %d (for '%s')\n", type, params.channel, buf);
8488         iwl_get_measurement(priv, &params, type);
8489
8490         return count;
8491 }
8492
8493 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8494                    show_measurement, store_measurement);
8495 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
8496
8497 static ssize_t store_retry_rate(struct device *d,
8498                                 struct device_attribute *attr,
8499                                 const char *buf, size_t count)
8500 {
8501         struct iwl_priv *priv = dev_get_drvdata(d);
8502
8503         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8504         if (priv->retry_rate <= 0)
8505                 priv->retry_rate = 1;
8506
8507         return count;
8508 }
8509
8510 static ssize_t show_retry_rate(struct device *d,
8511                                struct device_attribute *attr, char *buf)
8512 {
8513         struct iwl_priv *priv = dev_get_drvdata(d);
8514         return sprintf(buf, "%d", priv->retry_rate);
8515 }
8516
8517 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8518                    store_retry_rate);
8519
8520 static ssize_t store_power_level(struct device *d,
8521                                  struct device_attribute *attr,
8522                                  const char *buf, size_t count)
8523 {
8524         struct iwl_priv *priv = dev_get_drvdata(d);
8525         int rc;
8526         int mode;
8527
8528         mode = simple_strtoul(buf, NULL, 0);
8529         mutex_lock(&priv->mutex);
8530
8531         if (!iwl_is_ready(priv)) {
8532                 rc = -EAGAIN;
8533                 goto out;
8534         }
8535
8536         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8537                 mode = IWL_POWER_AC;
8538         else
8539                 mode |= IWL_POWER_ENABLED;
8540
8541         if (mode != priv->power_mode) {
8542                 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8543                 if (rc) {
8544                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8545                         goto out;
8546                 }
8547                 priv->power_mode = mode;
8548         }
8549
8550         rc = count;
8551
8552  out:
8553         mutex_unlock(&priv->mutex);
8554         return rc;
8555 }
8556
8557 #define MAX_WX_STRING 80
8558
8559 /* Values are in microsecond */
8560 static const s32 timeout_duration[] = {
8561         350000,
8562         250000,
8563         75000,
8564         37000,
8565         25000,
8566 };
8567 static const s32 period_duration[] = {
8568         400000,
8569         700000,
8570         1000000,
8571         1000000,
8572         1000000
8573 };
8574
8575 static ssize_t show_power_level(struct device *d,
8576                                 struct device_attribute *attr, char *buf)
8577 {
8578         struct iwl_priv *priv = dev_get_drvdata(d);
8579         int level = IWL_POWER_LEVEL(priv->power_mode);
8580         char *p = buf;
8581
8582         p += sprintf(p, "%d ", level);
8583         switch (level) {
8584         case IWL_POWER_MODE_CAM:
8585         case IWL_POWER_AC:
8586                 p += sprintf(p, "(AC)");
8587                 break;
8588         case IWL_POWER_BATTERY:
8589                 p += sprintf(p, "(BATTERY)");
8590                 break;
8591         default:
8592                 p += sprintf(p,
8593                              "(Timeout %dms, Period %dms)",
8594                              timeout_duration[level - 1] / 1000,
8595                              period_duration[level - 1] / 1000);
8596         }
8597
8598         if (!(priv->power_mode & IWL_POWER_ENABLED))
8599                 p += sprintf(p, " OFF\n");
8600         else
8601                 p += sprintf(p, " \n");
8602
8603         return (p - buf + 1);
8604
8605 }
8606
8607 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8608                    store_power_level);
8609
8610 static ssize_t show_channels(struct device *d,
8611                              struct device_attribute *attr, char *buf)
8612 {
8613         struct iwl_priv *priv = dev_get_drvdata(d);
8614         int len = 0, i;
8615         struct ieee80211_channel *channels = NULL;
8616         const struct ieee80211_hw_mode *hw_mode = NULL;
8617         int count = 0;
8618
8619         if (!iwl_is_ready(priv))
8620                 return -EAGAIN;
8621
8622         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8623         if (!hw_mode)
8624                 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8625         if (hw_mode) {
8626                 channels = hw_mode->channels;
8627                 count = hw_mode->num_channels;
8628         }
8629
8630         len +=
8631             sprintf(&buf[len],
8632                     "Displaying %d channels in 2.4GHz band "
8633                     "(802.11bg):\n", count);
8634
8635         for (i = 0; i < count; i++)
8636                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8637                                channels[i].chan,
8638                                channels[i].power_level,
8639                                channels[i].
8640                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8641                                " (IEEE 802.11h required)" : "",
8642                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8643                                 || (channels[i].
8644                                     flag &
8645                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8646                                ", IBSS",
8647                                channels[i].
8648                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8649                                "active/passive" : "passive only");
8650
8651         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8652         if (hw_mode) {
8653                 channels = hw_mode->channels;
8654                 count = hw_mode->num_channels;
8655         } else {
8656                 channels = NULL;
8657                 count = 0;
8658         }
8659
8660         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8661                        "(802.11a):\n", count);
8662
8663         for (i = 0; i < count; i++)
8664                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8665                                channels[i].chan,
8666                                channels[i].power_level,
8667                                channels[i].
8668                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8669                                " (IEEE 802.11h required)" : "",
8670                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8671                                 || (channels[i].
8672                                     flag &
8673                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8674                                ", IBSS",
8675                                channels[i].
8676                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8677                                "active/passive" : "passive only");
8678
8679         return len;
8680 }
8681
8682 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8683
8684 static ssize_t show_statistics(struct device *d,
8685                                struct device_attribute *attr, char *buf)
8686 {
8687         struct iwl_priv *priv = dev_get_drvdata(d);
8688         u32 size = sizeof(struct iwl_notif_statistics);
8689         u32 len = 0, ofs = 0;
8690         u8 *data = (u8 *) & priv->statistics;
8691         int rc = 0;
8692
8693         if (!iwl_is_alive(priv))
8694                 return -EAGAIN;
8695
8696         mutex_lock(&priv->mutex);
8697         rc = iwl_send_statistics_request(priv);
8698         mutex_unlock(&priv->mutex);
8699
8700         if (rc) {
8701                 len = sprintf(buf,
8702                               "Error sending statistics request: 0x%08X\n", rc);
8703                 return len;
8704         }
8705
8706         while (size && (PAGE_SIZE - len)) {
8707                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8708                                    PAGE_SIZE - len, 1);
8709                 len = strlen(buf);
8710                 if (PAGE_SIZE - len)
8711                         buf[len++] = '\n';
8712
8713                 ofs += 16;
8714                 size -= min(size, 16U);
8715         }
8716
8717         return len;
8718 }
8719
8720 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8721
8722 static ssize_t show_antenna(struct device *d,
8723                             struct device_attribute *attr, char *buf)
8724 {
8725         struct iwl_priv *priv = dev_get_drvdata(d);
8726
8727         if (!iwl_is_alive(priv))
8728                 return -EAGAIN;
8729
8730         return sprintf(buf, "%d\n", priv->antenna);
8731 }
8732
8733 static ssize_t store_antenna(struct device *d,
8734                              struct device_attribute *attr,
8735                              const char *buf, size_t count)
8736 {
8737         int ant;
8738         struct iwl_priv *priv = dev_get_drvdata(d);
8739
8740         if (count == 0)
8741                 return 0;
8742
8743         if (sscanf(buf, "%1i", &ant) != 1) {
8744                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8745                 return count;
8746         }
8747
8748         if ((ant >= 0) && (ant <= 2)) {
8749                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8750                 priv->antenna = (enum iwl_antenna)ant;
8751         } else
8752                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8753
8754
8755         return count;
8756 }
8757
8758 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8759
8760 static ssize_t show_status(struct device *d,
8761                            struct device_attribute *attr, char *buf)
8762 {
8763         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8764         if (!iwl_is_alive(priv))
8765                 return -EAGAIN;
8766         return sprintf(buf, "0x%08x\n", (int)priv->status);
8767 }
8768
8769 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8770
8771 static ssize_t dump_error_log(struct device *d,
8772                               struct device_attribute *attr,
8773                               const char *buf, size_t count)
8774 {
8775         char *p = (char *)buf;
8776
8777         if (p[0] == '1')
8778                 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8779
8780         return strnlen(buf, count);
8781 }
8782
8783 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8784
8785 static ssize_t dump_event_log(struct device *d,
8786                               struct device_attribute *attr,
8787                               const char *buf, size_t count)
8788 {
8789         char *p = (char *)buf;
8790
8791         if (p[0] == '1')
8792                 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8793
8794         return strnlen(buf, count);
8795 }
8796
8797 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8798
8799 /*****************************************************************************
8800  *
8801  * driver setup and teardown
8802  *
8803  *****************************************************************************/
8804
8805 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8806 {
8807         priv->workqueue = create_workqueue(DRV_NAME);
8808
8809         init_waitqueue_head(&priv->wait_command_queue);
8810
8811         INIT_WORK(&priv->up, iwl_bg_up);
8812         INIT_WORK(&priv->restart, iwl_bg_restart);
8813         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8814         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8815         INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8816         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8817         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8818         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8819         INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8820         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8821         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8822         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8823
8824         iwl_hw_setup_deferred_work(priv);
8825
8826         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8827                      iwl_irq_tasklet, (unsigned long)priv);
8828 }
8829
8830 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8831 {
8832         iwl_hw_cancel_deferred_work(priv);
8833
8834         cancel_delayed_work(&priv->scan_check);
8835         cancel_delayed_work(&priv->alive_start);
8836         cancel_delayed_work(&priv->post_associate);
8837         cancel_work_sync(&priv->beacon_update);
8838 }
8839
8840 static struct attribute *iwl_sysfs_entries[] = {
8841         &dev_attr_antenna.attr,
8842         &dev_attr_channels.attr,
8843         &dev_attr_dump_errors.attr,
8844         &dev_attr_dump_events.attr,
8845         &dev_attr_flags.attr,
8846         &dev_attr_filter_flags.attr,
8847 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8848         &dev_attr_measurement.attr,
8849 #endif
8850         &dev_attr_power_level.attr,
8851         &dev_attr_retry_rate.attr,
8852         &dev_attr_rf_kill.attr,
8853         &dev_attr_rs_window.attr,
8854         &dev_attr_statistics.attr,
8855         &dev_attr_status.attr,
8856         &dev_attr_temperature.attr,
8857         &dev_attr_tune.attr,
8858         &dev_attr_tx_power.attr,
8859
8860         NULL
8861 };
8862
8863 static struct attribute_group iwl_attribute_group = {
8864         .name = NULL,           /* put in device directory */
8865         .attrs = iwl_sysfs_entries,
8866 };
8867
8868 static struct ieee80211_ops iwl_hw_ops = {
8869         .tx = iwl_mac_tx,
8870         .start = iwl_mac_start,
8871         .stop = iwl_mac_stop,
8872         .add_interface = iwl_mac_add_interface,
8873         .remove_interface = iwl_mac_remove_interface,
8874         .config = iwl_mac_config,
8875         .config_interface = iwl_mac_config_interface,
8876         .configure_filter = iwl_configure_filter,
8877         .set_key = iwl_mac_set_key,
8878         .get_stats = iwl_mac_get_stats,
8879         .get_tx_stats = iwl_mac_get_tx_stats,
8880         .conf_tx = iwl_mac_conf_tx,
8881         .get_tsf = iwl_mac_get_tsf,
8882         .reset_tsf = iwl_mac_reset_tsf,
8883         .beacon_update = iwl_mac_beacon_update,
8884 #ifdef CONFIG_IWLWIFI_HT
8885         .conf_ht = iwl_mac_conf_ht,
8886         .get_ht_capab = iwl_mac_get_ht_capab,
8887 #ifdef CONFIG_IWLWIFI_HT_AGG
8888         .ht_tx_agg_start = iwl_mac_ht_tx_agg_start,
8889         .ht_tx_agg_stop = iwl_mac_ht_tx_agg_stop,
8890         .ht_rx_agg_start = iwl_mac_ht_rx_agg_start,
8891         .ht_rx_agg_stop = iwl_mac_ht_rx_agg_stop,
8892 #endif  /* CONFIG_IWLWIFI_HT_AGG */
8893 #endif  /* CONFIG_IWLWIFI_HT */
8894         .hw_scan = iwl_mac_hw_scan
8895 };
8896
8897 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8898 {
8899         int err = 0;
8900         struct iwl_priv *priv;
8901         struct ieee80211_hw *hw;
8902         int i;
8903
8904         if (iwl_param_disable_hw_scan) {
8905                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8906                 iwl_hw_ops.hw_scan = NULL;
8907         }
8908
8909         if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8910             (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8911                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8912                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8913                 err = -EINVAL;
8914                 goto out;
8915         }
8916
8917         /* mac80211 allocates memory for this device instance, including
8918          *   space for this driver's private structure */
8919         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8920         if (hw == NULL) {
8921                 IWL_ERROR("Can not allocate network device\n");
8922                 err = -ENOMEM;
8923                 goto out;
8924         }
8925         SET_IEEE80211_DEV(hw, &pdev->dev);
8926
8927         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8928         priv = hw->priv;
8929         priv->hw = hw;
8930
8931         priv->pci_dev = pdev;
8932         priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8933 #ifdef CONFIG_IWLWIFI_DEBUG
8934         iwl_debug_level = iwl_param_debug;
8935         atomic_set(&priv->restrict_refcnt, 0);
8936 #endif
8937         priv->retry_rate = 1;
8938
8939         priv->ibss_beacon = NULL;
8940
8941         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8942          *   the range of signal quality values that we'll provide.
8943          * Negative values for level/noise indicate that we'll provide dBm.
8944          * For WE, at least, non-0 values here *enable* display of values
8945          *   in app (iwconfig). */
8946         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8947         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8948         hw->max_signal = 100;   /* link quality indication (%) */
8949
8950         /* Tell mac80211 our Tx characteristics */
8951         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8952
8953         hw->queues = 4;
8954 #ifdef CONFIG_IWLWIFI_HT
8955 #ifdef CONFIG_IWLWIFI_HT_AGG
8956         hw->queues = 16;
8957 #endif /* CONFIG_IWLWIFI_HT_AGG */
8958 #endif /* CONFIG_IWLWIFI_HT */
8959
8960         spin_lock_init(&priv->lock);
8961         spin_lock_init(&priv->power_data.lock);
8962         spin_lock_init(&priv->sta_lock);
8963         spin_lock_init(&priv->hcmd_lock);
8964         spin_lock_init(&priv->lq_mngr.lock);
8965
8966         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8967                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8968
8969         INIT_LIST_HEAD(&priv->free_frames);
8970
8971         mutex_init(&priv->mutex);
8972         if (pci_enable_device(pdev)) {
8973                 err = -ENODEV;
8974                 goto out_ieee80211_free_hw;
8975         }
8976
8977         pci_set_master(pdev);
8978
8979         iwl_clear_stations_table(priv);
8980
8981         priv->data_retry_limit = -1;
8982         priv->ieee_channels = NULL;
8983         priv->ieee_rates = NULL;
8984         priv->phymode = -1;
8985
8986         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8987         if (!err)
8988                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8989         if (err) {
8990                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8991                 goto out_pci_disable_device;
8992         }
8993
8994         pci_set_drvdata(pdev, priv);
8995         err = pci_request_regions(pdev, DRV_NAME);
8996         if (err)
8997                 goto out_pci_disable_device;
8998         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8999          * PCI Tx retries from interfering with C3 CPU state */
9000         pci_write_config_byte(pdev, 0x41, 0x00);
9001         priv->hw_base = pci_iomap(pdev, 0, 0);
9002         if (!priv->hw_base) {
9003                 err = -ENODEV;
9004                 goto out_pci_release_regions;
9005         }
9006
9007         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9008                         (unsigned long long) pci_resource_len(pdev, 0));
9009         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9010
9011         /* Initialize module parameter values here */
9012
9013         if (iwl_param_disable) {
9014                 set_bit(STATUS_RF_KILL_SW, &priv->status);
9015                 IWL_DEBUG_INFO("Radio disabled.\n");
9016         }
9017
9018         priv->iw_mode = IEEE80211_IF_TYPE_STA;
9019
9020         priv->ps_mode = 0;
9021         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9022         priv->is_ht_enabled = 1;
9023         priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
9024         priv->valid_antenna = 0x7;      /* assume all 3 connected */
9025         priv->ps_mode = IWL_MIMO_PS_NONE;
9026         priv->cck_power_index_compensation = iwl_read32(
9027                 priv, CSR_HW_REV_WA_REG);
9028
9029         iwl4965_set_rxon_chain(priv);
9030
9031         printk(KERN_INFO DRV_NAME
9032                ": Detected Intel Wireless WiFi Link 4965AGN\n");
9033
9034         /* Device-specific setup */
9035         if (iwl_hw_set_hw_setting(priv)) {
9036                 IWL_ERROR("failed to set hw settings\n");
9037                 mutex_unlock(&priv->mutex);
9038                 goto out_iounmap;
9039         }
9040
9041 #ifdef CONFIG_IWLWIFI_QOS
9042         if (iwl_param_qos_enable)
9043                 priv->qos_data.qos_enable = 1;
9044
9045         iwl_reset_qos(priv);
9046
9047         priv->qos_data.qos_active = 0;
9048         priv->qos_data.qos_cap.val = 0;
9049 #endif /* CONFIG_IWLWIFI_QOS */
9050
9051         iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9052         iwl_setup_deferred_work(priv);
9053         iwl_setup_rx_handlers(priv);
9054
9055         priv->rates_mask = IWL_RATES_MASK;
9056         /* If power management is turned on, default to AC mode */
9057         priv->power_mode = IWL_POWER_AC;
9058         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9059
9060         pci_enable_msi(pdev);
9061
9062         err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
9063         if (err) {
9064                 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
9065                 goto out_disable_msi;
9066         }
9067
9068         mutex_lock(&priv->mutex);
9069
9070         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
9071         if (err) {
9072                 IWL_ERROR("failed to create sysfs device attributes\n");
9073                 mutex_unlock(&priv->mutex);
9074                 goto out_release_irq;
9075         }
9076
9077         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
9078          * ucode filename and max sizes are card-specific. */
9079         err = iwl_read_ucode(priv);
9080         if (err) {
9081                 IWL_ERROR("Could not read microcode: %d\n", err);
9082                 mutex_unlock(&priv->mutex);
9083                 goto out_pci_alloc;
9084         }
9085
9086         mutex_unlock(&priv->mutex);
9087
9088         IWL_DEBUG_INFO("Queing UP work.\n");
9089
9090         queue_work(priv->workqueue, &priv->up);
9091
9092         return 0;
9093
9094  out_pci_alloc:
9095         iwl_dealloc_ucode_pci(priv);
9096
9097         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9098
9099  out_release_irq:
9100         free_irq(pdev->irq, priv);
9101
9102  out_disable_msi:
9103         pci_disable_msi(pdev);
9104         destroy_workqueue(priv->workqueue);
9105         priv->workqueue = NULL;
9106         iwl_unset_hw_setting(priv);
9107
9108  out_iounmap:
9109         pci_iounmap(pdev, priv->hw_base);
9110  out_pci_release_regions:
9111         pci_release_regions(pdev);
9112  out_pci_disable_device:
9113         pci_disable_device(pdev);
9114         pci_set_drvdata(pdev, NULL);
9115  out_ieee80211_free_hw:
9116         ieee80211_free_hw(priv->hw);
9117  out:
9118         return err;
9119 }
9120
9121 static void iwl_pci_remove(struct pci_dev *pdev)
9122 {
9123         struct iwl_priv *priv = pci_get_drvdata(pdev);
9124         struct list_head *p, *q;
9125         int i;
9126
9127         if (!priv)
9128                 return;
9129
9130         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9131
9132         mutex_lock(&priv->mutex);
9133         set_bit(STATUS_EXIT_PENDING, &priv->status);
9134         __iwl_down(priv);
9135         mutex_unlock(&priv->mutex);
9136
9137         /* Free MAC hash list for ADHOC */
9138         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9139                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9140                         list_del(p);
9141                         kfree(list_entry(p, struct iwl_ibss_seq, list));
9142                 }
9143         }
9144
9145         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9146
9147         iwl_dealloc_ucode_pci(priv);
9148
9149         if (priv->rxq.bd)
9150                 iwl_rx_queue_free(priv, &priv->rxq);
9151         iwl_hw_txq_ctx_free(priv);
9152
9153         iwl_unset_hw_setting(priv);
9154         iwl_clear_stations_table(priv);
9155
9156         if (priv->mac80211_registered) {
9157                 ieee80211_unregister_hw(priv->hw);
9158                 iwl_rate_control_unregister(priv->hw);
9159         }
9160
9161         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
9162          * priv->workqueue... so we can't take down the workqueue
9163          * until now... */
9164         destroy_workqueue(priv->workqueue);
9165         priv->workqueue = NULL;
9166
9167         free_irq(pdev->irq, priv);
9168         pci_disable_msi(pdev);
9169         pci_iounmap(pdev, priv->hw_base);
9170         pci_release_regions(pdev);
9171         pci_disable_device(pdev);
9172         pci_set_drvdata(pdev, NULL);
9173
9174         kfree(priv->channel_info);
9175
9176         kfree(priv->ieee_channels);
9177         kfree(priv->ieee_rates);
9178
9179         if (priv->ibss_beacon)
9180                 dev_kfree_skb(priv->ibss_beacon);
9181
9182         ieee80211_free_hw(priv->hw);
9183 }
9184
9185 #ifdef CONFIG_PM
9186
9187 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9188 {
9189         struct iwl_priv *priv = pci_get_drvdata(pdev);
9190
9191         mutex_lock(&priv->mutex);
9192
9193         set_bit(STATUS_IN_SUSPEND, &priv->status);
9194
9195         /* Take down the device; powers it off, etc. */
9196         __iwl_down(priv);
9197
9198         if (priv->mac80211_registered)
9199                 ieee80211_stop_queues(priv->hw);
9200
9201         pci_save_state(pdev);
9202         pci_disable_device(pdev);
9203         pci_set_power_state(pdev, PCI_D3hot);
9204
9205         mutex_unlock(&priv->mutex);
9206
9207         return 0;
9208 }
9209
9210 static void iwl_resume(struct iwl_priv *priv)
9211 {
9212         unsigned long flags;
9213
9214         /* The following it a temporary work around due to the
9215          * suspend / resume not fully initializing the NIC correctly.
9216          * Without all of the following, resume will not attempt to take
9217          * down the NIC (it shouldn't really need to) and will just try
9218          * and bring the NIC back up.  However that fails during the
9219          * ucode verification process.  This then causes iwl_down to be
9220          * called *after* iwl_hw_nic_init() has succeeded -- which
9221          * then lets the next init sequence succeed.  So, we've
9222          * replicated all of that NIC init code here... */
9223
9224         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9225
9226         iwl_hw_nic_init(priv);
9227
9228         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9229         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
9230                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
9231         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9232         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9233         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9234
9235         /* tell the device to stop sending interrupts */
9236         iwl_disable_interrupts(priv);
9237
9238         spin_lock_irqsave(&priv->lock, flags);
9239         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
9240
9241         if (!iwl_grab_restricted_access(priv)) {
9242                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
9243                                          APMG_CLK_VAL_DMA_CLK_RQT);
9244                 iwl_release_restricted_access(priv);
9245         }
9246         spin_unlock_irqrestore(&priv->lock, flags);
9247
9248         udelay(5);
9249
9250         iwl_hw_nic_reset(priv);
9251
9252         /* Bring the device back up */
9253         clear_bit(STATUS_IN_SUSPEND, &priv->status);
9254         queue_work(priv->workqueue, &priv->up);
9255 }
9256
9257 static int iwl_pci_resume(struct pci_dev *pdev)
9258 {
9259         struct iwl_priv *priv = pci_get_drvdata(pdev);
9260         int err;
9261
9262         printk(KERN_INFO "Coming out of suspend...\n");
9263
9264         mutex_lock(&priv->mutex);
9265
9266         pci_set_power_state(pdev, PCI_D0);
9267         err = pci_enable_device(pdev);
9268         pci_restore_state(pdev);
9269
9270         /*
9271          * Suspend/Resume resets the PCI configuration space, so we have to
9272          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
9273          * from interfering with C3 CPU state. pci_restore_state won't help
9274          * here since it only restores the first 64 bytes pci config header.
9275          */
9276         pci_write_config_byte(pdev, 0x41, 0x00);
9277
9278         iwl_resume(priv);
9279         mutex_unlock(&priv->mutex);
9280
9281         return 0;
9282 }
9283
9284 #endif /* CONFIG_PM */
9285
9286 /*****************************************************************************
9287  *
9288  * driver and module entry point
9289  *
9290  *****************************************************************************/
9291
9292 static struct pci_driver iwl_driver = {
9293         .name = DRV_NAME,
9294         .id_table = iwl_hw_card_ids,
9295         .probe = iwl_pci_probe,
9296         .remove = __devexit_p(iwl_pci_remove),
9297 #ifdef CONFIG_PM
9298         .suspend = iwl_pci_suspend,
9299         .resume = iwl_pci_resume,
9300 #endif
9301 };
9302
9303 static int __init iwl_init(void)
9304 {
9305
9306         int ret;
9307         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9308         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9309         ret = pci_register_driver(&iwl_driver);
9310         if (ret) {
9311                 IWL_ERROR("Unable to initialize PCI module\n");
9312                 return ret;
9313         }
9314 #ifdef CONFIG_IWLWIFI_DEBUG
9315         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
9316         if (ret) {
9317                 IWL_ERROR("Unable to create driver sysfs file\n");
9318                 pci_unregister_driver(&iwl_driver);
9319                 return ret;
9320         }
9321 #endif
9322
9323         return ret;
9324 }
9325
9326 static void __exit iwl_exit(void)
9327 {
9328 #ifdef CONFIG_IWLWIFI_DEBUG
9329         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
9330 #endif
9331         pci_unregister_driver(&iwl_driver);
9332 }
9333
9334 module_param_named(antenna, iwl_param_antenna, int, 0444);
9335 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9336 module_param_named(disable, iwl_param_disable, int, 0444);
9337 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9338 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
9339 MODULE_PARM_DESC(hwcrypto,
9340                  "using hardware crypto engine (default 0 [software])\n");
9341 module_param_named(debug, iwl_param_debug, int, 0444);
9342 MODULE_PARM_DESC(debug, "debug output mask");
9343 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
9344 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9345
9346 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
9347 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9348
9349 /* QoS */
9350 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
9351 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9352
9353 module_exit(iwl_exit);
9354 module_init(iwl_init);