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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-eeprom.h"
  49 #include "iwl-4965.h"
  50 #include "iwl-core.h"
  51 #include "iwl-io.h"
  52 #include "iwl-helpers.h"
  53 #include "iwl-sta.h"
  54 #include "iwl-calib.h"
  55
  56 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
  57                                   struct iwl4965_tx_queue *txq);
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /*
  66  * module name, copyright, version, etc.
  67  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  68  */
  69
  70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  79 #define VS "s"
  80 #else
  81 #define VS
  82 #endif
  83
  84 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  85
  86
  87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  88 MODULE_VERSION(DRV_VERSION);
  89 MODULE_AUTHOR(DRV_COPYRIGHT);
  90 MODULE_LICENSE("GPL");
  91
  92 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
  93 {
  94         u16 fc = le16_to_cpu(hdr->frame_control);
  95         int hdr_len = ieee80211_get_hdrlen(fc);
  96
  97         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
  98                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
  99         return NULL;
 100 }
 101
 102 static const struct ieee80211_supported_band *iwl_get_hw_mode(
 103                 struct iwl_priv *priv, enum ieee80211_band band)
 104 {
 105         return priv->hw->wiphy->bands[band];
 106 }
 107
 108 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 109 {
 110         /* Single white space is for Linksys APs */
 111         if (essid_len == 1 && essid[0] == ' ')
 112                 return 1;
 113
 114         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 115         while (essid_len) {
 116                 essid_len--;
 117                 if (essid[essid_len] != '\0')
 118                         return 0;
 119         }
 120
 121         return 1;
 122 }
 123
 124 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 125 {
 126         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 127         const char *s = essid;
 128         char *d = escaped;
 129
 130         if (iwl4965_is_empty_essid(essid, essid_len)) {
 131                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 132                 return escaped;
 133         }
 134
 135         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 136         while (essid_len--) {
 137                 if (*s == '\0') {
 138                         *d++ = '\\';
 139                         *d++ = '0';
 140                         s++;
 141                 } else
 142                         *d++ = *s++;
 143         }
 144         *d = '\0';
 145         return escaped;
 146 }
 147
 148 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 149  * DMA services
 150  *
 151  * Theory of operation
 152  *
 153  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 154  * of buffer descriptors, each of which points to one or more data buffers for
 155  * the device to read from or fill.  Driver and device exchange status of each
 156  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 157  * entries in each circular buffer, to protect against confusing empty and full
 158  * queue states.
 159  *
 160  * The device reads or writes the data in the queues via the device's several
 161  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 162  *
 163  * For Tx queue, there are low mark and high mark limits. If, after queuing
 164  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 165  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 166  * Tx queue resumed.
 167  *
 168  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 169  * queue (#4) for sending commands to the device firmware, and 15 other
 170  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 171  *
 172  * See more detailed info in iwl-4965-hw.h.
 173  ***************************************************/
 174
 175 int iwl4965_queue_space(const struct iwl4965_queue *q)
 176 {
 177         int s = q->read_ptr - q->write_ptr;
 178
 179         if (q->read_ptr > q->write_ptr)
 180                 s -= q->n_bd;
 181
 182         if (s <= 0)
 183                 s += q->n_window;
 184         /* keep some reserve to not confuse empty and full situations */
 185         s -= 2;
 186         if (s < 0)
 187                 s = 0;
 188         return s;
 189 }
 190
 191
 192 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 193 {
 194         return q->write_ptr > q->read_ptr ?
 195                 (i >= q->read_ptr && i < q->write_ptr) :
 196                 !(i < q->read_ptr && i >= q->write_ptr);
 197 }
 198
 199 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 200 {
 201         /* This is for scan command, the big buffer at end of command array */
 202         if (is_huge)
 203                 return q->n_window;     /* must be power of 2 */
 204
 205         /* Otherwise, use normal size buffers */
 206         return index & (q->n_window - 1);
 207 }
 208
 209 /**
 210  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 211  */
 212 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
 213                           int count, int slots_num, u32 id)
 214 {
 215         q->n_bd = count;
 216         q->n_window = slots_num;
 217         q->id = id;
 218
 219         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 220          * and iwl_queue_dec_wrap are broken. */
 221         BUG_ON(!is_power_of_2(count));
 222
 223         /* slots_num must be power-of-two size, otherwise
 224          * get_cmd_index is broken. */
 225         BUG_ON(!is_power_of_2(slots_num));
 226
 227         q->low_mark = q->n_window / 4;
 228         if (q->low_mark < 4)
 229                 q->low_mark = 4;
 230
 231         q->high_mark = q->n_window / 8;
 232         if (q->high_mark < 2)
 233                 q->high_mark = 2;
 234
 235         q->write_ptr = q->read_ptr = 0;
 236
 237         return 0;
 238 }
 239
 240 /**
 241  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 242  */
 243 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
 244                               struct iwl4965_tx_queue *txq, u32 id)
 245 {
 246         struct pci_dev *dev = priv->pci_dev;
 247
 248         /* Driver private data, only for Tx (not command) queues,
 249          * not shared with device. */
 250         if (id != IWL_CMD_QUEUE_NUM) {
 251                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 252                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 253                 if (!txq->txb) {
 254                         IWL_ERROR("kmalloc for auxiliary BD "
 255                                   "structures failed\n");
 256                         goto error;
 257                 }
 258         } else
 259                 txq->txb = NULL;
 260
 261         /* Circular buffer of transmit frame descriptors (TFDs),
 262          * shared with device */
 263         txq->bd = pci_alloc_consistent(dev,
 264                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 265                         &txq->q.dma_addr);
 266
 267         if (!txq->bd) {
 268                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 269                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 270                 goto error;
 271         }
 272         txq->q.id = id;
 273
 274         return 0;
 275
 276  error:
 277         if (txq->txb) {
 278                 kfree(txq->txb);
 279                 txq->txb = NULL;
 280         }
 281
 282         return -ENOMEM;
 283 }
 284
 285 /**
 286  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 287  */
 288 int iwl4965_tx_queue_init(struct iwl_priv *priv,
 289                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 290 {
 291         struct pci_dev *dev = priv->pci_dev;
 292         int len;
 293         int rc = 0;
 294
 295         /*
 296          * Alloc buffer array for commands (Tx or other types of commands).
 297          * For the command queue (#4), allocate command space + one big
 298          * command for scan, since scan command is very huge; the system will
 299          * not have two scans at the same time, so only one is needed.
 300          * For normal Tx queues (all other queues), no super-size command
 301          * space is needed.
 302          */
 303         len = sizeof(struct iwl_cmd) * slots_num;
 304         if (txq_id == IWL_CMD_QUEUE_NUM)
 305                 len +=  IWL_MAX_SCAN_SIZE;
 306         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 307         if (!txq->cmd)
 308                 return -ENOMEM;
 309
 310         /* Alloc driver data array and TFD circular buffer */
 311         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 312         if (rc) {
 313                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 314
 315                 return -ENOMEM;
 316         }
 317         txq->need_update = 0;
 318
 319         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 320          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 321         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 322
 323         /* Initialize queue's high/low-water marks, and head/tail indexes */
 324         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 325
 326         /* Tell device where to find queue */
 327         iwl4965_hw_tx_queue_init(priv, txq);
 328
 329         return 0;
 330 }
 331
 332 /**
 333  * iwl4965_tx_queue_free - Deallocate DMA queue.
 334  * @txq: Transmit queue to deallocate.
 335  *
 336  * Empty queue by removing and destroying all BD's.
 337  * Free all buffers.
 338  * 0-fill, but do not free "txq" descriptor structure.
 339  */
 340 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
 341 {
 342         struct iwl4965_queue *q = &txq->q;
 343         struct pci_dev *dev = priv->pci_dev;
 344         int len;
 345
 346         if (q->n_bd == 0)
 347                 return;
 348
 349         /* first, empty all BD's */
 350         for (; q->write_ptr != q->read_ptr;
 351              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 352                 iwl4965_hw_txq_free_tfd(priv, txq);
 353
 354         len = sizeof(struct iwl_cmd) * q->n_window;
 355         if (q->id == IWL_CMD_QUEUE_NUM)
 356                 len += IWL_MAX_SCAN_SIZE;
 357
 358         /* De-alloc array of command/tx buffers */
 359         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 360
 361         /* De-alloc circular buffer of TFDs */
 362         if (txq->q.n_bd)
 363                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 364                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 365
 366         /* De-alloc array of per-TFD driver data */
 367         if (txq->txb) {
 368                 kfree(txq->txb);
 369                 txq->txb = NULL;
 370         }
 371
 372         /* 0-fill queue descriptor structure */
 373         memset(txq, 0, sizeof(*txq));
 374 }
 375
 376 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 377
 378 /*************** STATION TABLE MANAGEMENT ****
 379  * mac80211 should be examined to determine if sta_info is duplicating
 380  * the functionality provided here
 381  */
 382
 383 /**************************************************************/
 384
 385 #if 0 /* temporary disable till we add real remove station */
 386 /**
 387  * iwl4965_remove_station - Remove driver's knowledge of station.
 388  *
 389  * NOTE:  This does not remove station from device's station table.
 390  */
 391 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 392 {
 393         int index = IWL_INVALID_STATION;
 394         int i;
 395         unsigned long flags;
 396
 397         spin_lock_irqsave(&priv->sta_lock, flags);
 398
 399         if (is_ap)
 400                 index = IWL_AP_ID;
 401         else if (is_broadcast_ether_addr(addr))
 402                 index = priv->hw_params.bcast_sta_id;
 403         else
 404                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 405                         if (priv->stations[i].used &&
 406                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 407                                                 addr)) {
 408                                 index = i;
 409                                 break;
 410                         }
 411
 412         if (unlikely(index == IWL_INVALID_STATION))
 413                 goto out;
 414
 415         if (priv->stations[index].used) {
 416                 priv->stations[index].used = 0;
 417                 priv->num_stations--;
 418         }
 419
 420         BUG_ON(priv->num_stations < 0);
 421
 422 out:
 423         spin_unlock_irqrestore(&priv->sta_lock, flags);
 424         return 0;
 425 }
 426 #endif
 427
 428 /**
 429  * iwl4965_add_station_flags - Add station to tables in driver and device
 430  */
 431 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
 432                                 int is_ap, u8 flags, void *ht_data)
 433 {
 434         int i;
 435         int index = IWL_INVALID_STATION;
 436         struct iwl4965_station_entry *station;
 437         unsigned long flags_spin;
 438         DECLARE_MAC_BUF(mac);
 439
 440         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 441         if (is_ap)
 442                 index = IWL_AP_ID;
 443         else if (is_broadcast_ether_addr(addr))
 444                 index = priv->hw_params.bcast_sta_id;
 445         else
 446                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 447                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 448                                                 addr)) {
 449                                 index = i;
 450                                 break;
 451                         }
 452
 453                         if (!priv->stations[i].used &&
 454                             index == IWL_INVALID_STATION)
 455                                 index = i;
 456                 }
 457
 458
 459         /* These two conditions have the same outcome, but keep them separate
 460           since they have different meanings */
 461         if (unlikely(index == IWL_INVALID_STATION)) {
 462                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 463                 return index;
 464         }
 465
 466         if (priv->stations[index].used &&
 467             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 468                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 469                 return index;
 470         }
 471
 472
 473         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 474         station = &priv->stations[index];
 475         station->used = 1;
 476         priv->num_stations++;
 477
 478         /* Set up the REPLY_ADD_STA command to send to device */
 479         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 480         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 481         station->sta.mode = 0;
 482         station->sta.sta.sta_id = index;
 483         station->sta.station_flags = 0;
 484
 485 #ifdef CONFIG_IWL4965_HT
 486         /* BCAST station and IBSS stations do not work in HT mode */
 487         if (index != priv->hw_params.bcast_sta_id &&
 488             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 489                 iwl4965_set_ht_add_station(priv, index,
 490                                  (struct ieee80211_ht_info *) ht_data);
 491 #endif /*CONFIG_IWL4965_HT*/
 492
 493         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 494
 495         /* Add station to device's station table */
 496         iwl4965_send_add_station(priv, &station->sta, flags);
 497         return index;
 498
 499 }
 500
 501
 502
 503 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 504
 505 /**
 506  * iwl4965_enqueue_hcmd - enqueue a uCode command
 507  * @priv: device private data point
 508  * @cmd: a point to the ucode command structure
 509  *
 510  * The function returns < 0 values to indicate the operation is
 511  * failed. On success, it turns the index (> 0) of command in the
 512  * command queue.
 513  */
 514 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 515 {
 516         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 517         struct iwl4965_queue *q = &txq->q;
 518         struct iwl4965_tfd_frame *tfd;
 519         u32 *control_flags;
 520         struct iwl_cmd *out_cmd;
 521         u32 idx;
 522         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 523         dma_addr_t phys_addr;
 524         int ret;
 525         unsigned long flags;
 526
 527         /* If any of the command structures end up being larger than
 528          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 529          * we will need to increase the size of the TFD entries */
 530         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 531                !(cmd->meta.flags & CMD_SIZE_HUGE));
 532
 533         if (iwl_is_rfkill(priv)) {
 534                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 535                 return -EIO;
 536         }
 537
 538         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 539                 IWL_ERROR("No space for Tx\n");
 540                 return -ENOSPC;
 541         }
 542
 543         spin_lock_irqsave(&priv->hcmd_lock, flags);
 544
 545         tfd = &txq->bd[q->write_ptr];
 546         memset(tfd, 0, sizeof(*tfd));
 547
 548         control_flags = (u32 *) tfd;
 549
 550         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 551         out_cmd = &txq->cmd[idx];
 552
 553         out_cmd->hdr.cmd = cmd->id;
 554         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 555         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 556
 557         /* At this point, the out_cmd now has all of the incoming cmd
 558          * information */
 559
 560         out_cmd->hdr.flags = 0;
 561         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 562                         INDEX_TO_SEQ(q->write_ptr));
 563         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 564                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 565
 566         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 567                         offsetof(struct iwl_cmd, hdr);
 568         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 569
 570         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 571                      "%d bytes at %d[%d]:%d\n",
 572                      get_cmd_string(out_cmd->hdr.cmd),
 573                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 574                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 575
 576         txq->need_update = 1;
 577
 578         /* Set up entry in queue's byte count circular buffer */
 579         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
 580
 581         /* Increment and update queue's write index */
 582         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 583         ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
 584
 585         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 586         return ret ? ret : idx;
 587 }
 588
 589 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 590 {
 591         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 592
 593         if (hw_decrypt)
 594                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 595         else
 596                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 597
 598 }
 599
 600 /**
 601  * iwl4965_rxon_add_station - add station into station table.
 602  *
 603  * there is only one AP station with id= IWL_AP_ID
 604  * NOTE: mutex must be held before calling this fnction
 605  */
 606 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 607                                 const u8 *addr, int is_ap)
 608 {
 609         u8 sta_id;
 610
 611         /* Add station to device's station table */
 612 #ifdef CONFIG_IWL4965_HT
 613         struct ieee80211_conf *conf = &priv->hw->conf;
 614         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 615
 616         if ((is_ap) &&
 617             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 618             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 619                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 620                                                    0, cur_ht_config);
 621         else
 622 #endif /* CONFIG_IWL4965_HT */
 623                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 624                                                    0, NULL);
 625
 626         /* Set up default rate scaling table in device's station table */
 627         iwl4965_add_station(priv, addr, is_ap);
 628
 629         return sta_id;
 630 }
 631
 632 /**
 633  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 634  *
 635  * NOTE:  This is really only useful during development and can eventually
 636  * be #ifdef'd out once the driver is stable and folks aren't actively
 637  * making changes
 638  */
 639 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 640 {
 641         int error = 0;
 642         int counter = 1;
 643
 644         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 645                 error |= le32_to_cpu(rxon->flags &
 646                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 647                                  RXON_FLG_RADAR_DETECT_MSK));
 648                 if (error)
 649                         IWL_WARNING("check 24G fields %d | %d\n",
 650                                     counter++, error);
 651         } else {
 652                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 653                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 654                 if (error)
 655                         IWL_WARNING("check 52 fields %d | %d\n",
 656                                     counter++, error);
 657                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 658                 if (error)
 659                         IWL_WARNING("check 52 CCK %d | %d\n",
 660                                     counter++, error);
 661         }
 662         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 663         if (error)
 664                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 665
 666         /* make sure basic rates 6Mbps and 1Mbps are supported */
 667         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 668                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 669         if (error)
 670                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 671
 672         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 673         if (error)
 674                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 675
 676         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 677                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 678         if (error)
 679                 IWL_WARNING("check CCK and short slot %d | %d\n",
 680                             counter++, error);
 681
 682         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 683                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 684         if (error)
 685                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 686                             counter++, error);
 687
 688         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 689                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 690         if (error)
 691                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 692                             counter++, error);
 693
 694         if (error)
 695                 IWL_WARNING("Tuning to channel %d\n",
 696                             le16_to_cpu(rxon->channel));
 697
 698         if (error) {
 699                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 700                 return -1;
 701         }
 702         return 0;
 703 }
 704
 705 /**
 706  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 707  * @priv: staging_rxon is compared to active_rxon
 708  *
 709  * If the RXON structure is changing enough to require a new tune,
 710  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 711  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 712  */
 713 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 714 {
 715
 716         /* These items are only settable from the full RXON command */
 717         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 718             compare_ether_addr(priv->staging_rxon.bssid_addr,
 719                                priv->active_rxon.bssid_addr) ||
 720             compare_ether_addr(priv->staging_rxon.node_addr,
 721                                priv->active_rxon.node_addr) ||
 722             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 723                                priv->active_rxon.wlap_bssid_addr) ||
 724             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 725             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 726             (priv->staging_rxon.air_propagation !=
 727              priv->active_rxon.air_propagation) ||
 728             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 729              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 730             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 731              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 732             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 733             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 734                 return 1;
 735
 736         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 737          * be updated with the RXON_ASSOC command -- however only some
 738          * flag transitions are allowed using RXON_ASSOC */
 739
 740         /* Check if we are not switching bands */
 741         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 742             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 743                 return 1;
 744
 745         /* Check if we are switching association toggle */
 746         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 747                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 748                 return 1;
 749
 750         return 0;
 751 }
 752
 753 /**
 754  * iwl4965_commit_rxon - commit staging_rxon to hardware
 755  *
 756  * The RXON command in staging_rxon is committed to the hardware and
 757  * the active_rxon structure is updated with the new data.  This
 758  * function correctly transitions out of the RXON_ASSOC_MSK state if
 759  * a HW tune is required based on the RXON structure changes.
 760  */
 761 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 762 {
 763         /* cast away the const for active_rxon in this function */
 764         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 765         DECLARE_MAC_BUF(mac);
 766         int rc = 0;
 767
 768         if (!iwl_is_alive(priv))
 769                 return -1;
 770
 771         /* always get timestamp with Rx frame */
 772         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 773
 774         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 775         if (rc) {
 776                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 777                 return -EINVAL;
 778         }
 779
 780         /* If we don't need to send a full RXON, we can use
 781          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 782          * and other flags for the current radio configuration. */
 783         if (!iwl4965_full_rxon_required(priv)) {
 784                 rc = iwl_send_rxon_assoc(priv);
 785                 if (rc) {
 786                         IWL_ERROR("Error setting RXON_ASSOC "
 787                                   "configuration (%d).\n", rc);
 788                         return rc;
 789                 }
 790
 791                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 792
 793                 return 0;
 794         }
 795
 796         /* station table will be cleared */
 797         priv->assoc_station_added = 0;
 798
 799         /* If we are currently associated and the new config requires
 800          * an RXON_ASSOC and the new config wants the associated mask enabled,
 801          * we must clear the associated from the active configuration
 802          * before we apply the new config */
 803         if (iwl_is_associated(priv) &&
 804             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 805                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 806                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 807
 808                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 809                                       sizeof(struct iwl4965_rxon_cmd),
 810                                       &priv->active_rxon);
 811
 812                 /* If the mask clearing failed then we set
 813                  * active_rxon back to what it was previously */
 814                 if (rc) {
 815                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 816                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 817                                   "configuration (%d).\n", rc);
 818                         return rc;
 819                 }
 820         }
 821
 822         IWL_DEBUG_INFO("Sending RXON\n"
 823                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 824                        "* channel = %d\n"
 825                        "* bssid = %s\n",
 826                        ((priv->staging_rxon.filter_flags &
 827                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 828                        le16_to_cpu(priv->staging_rxon.channel),
 829                        print_mac(mac, priv->staging_rxon.bssid_addr));
 830
 831         iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 832         /* Apply the new configuration */
 833         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 834                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
 835         if (rc) {
 836                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 837                 return rc;
 838         }
 839
 840         iwlcore_clear_stations_table(priv);
 841
 842         if (!priv->error_recovering)
 843                 priv->start_calib = 0;
 844
 845         iwl_init_sensitivity(priv);
 846
 847         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 848
 849         /* If we issue a new RXON command which required a tune then we must
 850          * send a new TXPOWER command or we won't be able to Tx any frames */
 851         rc = iwl4965_hw_reg_send_txpower(priv);
 852         if (rc) {
 853                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 854                 return rc;
 855         }
 856
 857         /* Add the broadcast address so we can send broadcast frames */
 858         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
 859             IWL_INVALID_STATION) {
 860                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 861                 return -EIO;
 862         }
 863
 864         /* If we have set the ASSOC_MSK and we are in BSS mode then
 865          * add the IWL_AP_ID to the station rate table */
 866         if (iwl_is_associated(priv) &&
 867             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 868                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 869                     == IWL_INVALID_STATION) {
 870                         IWL_ERROR("Error adding AP address for transmit.\n");
 871                         return -EIO;
 872                 }
 873                 priv->assoc_station_added = 1;
 874                 if (priv->default_wep_key &&
 875                     iwl_send_static_wepkey_cmd(priv, 0))
 876                         IWL_ERROR("Could not send WEP static key.\n");
 877         }
 878
 879         return 0;
 880 }
 881
 882 void iwl4965_update_chain_flags(struct iwl_priv *priv)
 883 {
 884
 885         iwl4965_set_rxon_chain(priv);
 886         iwl4965_commit_rxon(priv);
 887 }
 888
 889 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 890 {
 891         struct iwl4965_bt_cmd bt_cmd = {
 892                 .flags = 3,
 893                 .lead_time = 0xAA,
 894                 .max_kill = 1,
 895                 .kill_ack_mask = 0,
 896                 .kill_cts_mask = 0,
 897         };
 898
 899         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 900                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 901 }
 902
 903 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
 904 {
 905         int rc = 0;
 906         struct iwl4965_rx_packet *res;
 907         struct iwl_host_cmd cmd = {
 908                 .id = REPLY_SCAN_ABORT_CMD,
 909                 .meta.flags = CMD_WANT_SKB,
 910         };
 911
 912         /* If there isn't a scan actively going on in the hardware
 913          * then we are in between scan bands and not actually
 914          * actively scanning, so don't send the abort command */
 915         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 916                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 917                 return 0;
 918         }
 919
 920         rc = iwl_send_cmd_sync(priv, &cmd);
 921         if (rc) {
 922                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 923                 return rc;
 924         }
 925
 926         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 927         if (res->u.status != CAN_ABORT_STATUS) {
 928                 /* The scan abort will return 1 for success or
 929                  * 2 for "failure".  A failure condition can be
 930                  * due to simply not being in an active scan which
 931                  * can occur if we send the scan abort before we
 932                  * the microcode has notified us that a scan is
 933                  * completed. */
 934                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 935                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 936                 clear_bit(STATUS_SCAN_HW, &priv->status);
 937         }
 938
 939         dev_kfree_skb_any(cmd.meta.u.skb);
 940
 941         return rc;
 942 }
 943
 944 /*
 945  * CARD_STATE_CMD
 946  *
 947  * Use: Sets the device's internal card state to enable, disable, or halt
 948  *
 949  * When in the 'enable' state the card operates as normal.
 950  * When in the 'disable' state, the card enters into a low power mode.
 951  * When in the 'halt' state, the card is shut down and must be fully
 952  * restarted to come back on.
 953  */
 954 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
 955 {
 956         struct iwl_host_cmd cmd = {
 957                 .id = REPLY_CARD_STATE_CMD,
 958                 .len = sizeof(u32),
 959                 .data = &flags,
 960                 .meta.flags = meta_flag,
 961         };
 962
 963         return iwl_send_cmd(priv, &cmd);
 964 }
 965
 966 int iwl4965_send_add_station(struct iwl_priv *priv,
 967                          struct iwl4965_addsta_cmd *sta, u8 flags)
 968 {
 969         struct iwl4965_rx_packet *res = NULL;
 970         int rc = 0;
 971         struct iwl_host_cmd cmd = {
 972                 .id = REPLY_ADD_STA,
 973                 .len = sizeof(struct iwl4965_addsta_cmd),
 974                 .meta.flags = flags,
 975                 .data = sta,
 976         };
 977
 978         if (!(flags & CMD_ASYNC))
 979                 cmd.meta.flags |= CMD_WANT_SKB;
 980
 981         rc = iwl_send_cmd(priv, &cmd);
 982
 983         if (rc || (flags & CMD_ASYNC))
 984                 return rc;
 985
 986         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 987         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 988                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 989                           res->hdr.flags);
 990                 rc = -EIO;
 991         }
 992
 993         if (rc == 0) {
 994                 switch (res->u.add_sta.status) {
 995                 case ADD_STA_SUCCESS_MSK:
 996                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 997                         break;
 998                 default:
 999                         rc = -EIO;
1000                         IWL_WARNING("REPLY_ADD_STA failed\n");
1001                         break;
1002                 }
1003         }
1004
1005         priv->alloc_rxb_skb--;
1006         dev_kfree_skb_any(cmd.meta.u.skb);
1007
1008         return rc;
1009 }
1010
1011 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1012 {
1013         struct list_head *element;
1014
1015         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1016                        priv->frames_count);
1017
1018         while (!list_empty(&priv->free_frames)) {
1019                 element = priv->free_frames.next;
1020                 list_del(element);
1021                 kfree(list_entry(element, struct iwl4965_frame, list));
1022                 priv->frames_count--;
1023         }
1024
1025         if (priv->frames_count) {
1026                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1027                             priv->frames_count);
1028                 priv->frames_count = 0;
1029         }
1030 }
1031
1032 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1033 {
1034         struct iwl4965_frame *frame;
1035         struct list_head *element;
1036         if (list_empty(&priv->free_frames)) {
1037                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1038                 if (!frame) {
1039                         IWL_ERROR("Could not allocate frame!\n");
1040                         return NULL;
1041                 }
1042
1043                 priv->frames_count++;
1044                 return frame;
1045         }
1046
1047         element = priv->free_frames.next;
1048         list_del(element);
1049         return list_entry(element, struct iwl4965_frame, list);
1050 }
1051
1052 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1053 {
1054         memset(frame, 0, sizeof(*frame));
1055         list_add(&frame->list, &priv->free_frames);
1056 }
1057
1058 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1059                                 struct ieee80211_hdr *hdr,
1060                                 const u8 *dest, int left)
1061 {
1062
1063         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1064             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1065              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1066                 return 0;
1067
1068         if (priv->ibss_beacon->len > left)
1069                 return 0;
1070
1071         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1072
1073         return priv->ibss_beacon->len;
1074 }
1075
1076 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1077 {
1078         u8 i;
1079
1080         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1081              i = iwl4965_rates[i].next_ieee) {
1082                 if (rate_mask & (1 << i))
1083                         return iwl4965_rates[i].plcp;
1084         }
1085
1086         return IWL_RATE_INVALID;
1087 }
1088
1089 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1090 {
1091         struct iwl4965_frame *frame;
1092         unsigned int frame_size;
1093         int rc;
1094         u8 rate;
1095
1096         frame = iwl4965_get_free_frame(priv);
1097
1098         if (!frame) {
1099                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1100                           "command.\n");
1101                 return -ENOMEM;
1102         }
1103
1104         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1105                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1106                                                 0xFF0);
1107                 if (rate == IWL_INVALID_RATE)
1108                         rate = IWL_RATE_6M_PLCP;
1109         } else {
1110                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1111                 if (rate == IWL_INVALID_RATE)
1112                         rate = IWL_RATE_1M_PLCP;
1113         }
1114
1115         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1116
1117         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1118                               &frame->u.cmd[0]);
1119
1120         iwl4965_free_frame(priv, frame);
1121
1122         return rc;
1123 }
1124
1125 /******************************************************************************
1126  *
1127  * Misc. internal state and helper functions
1128  *
1129  ******************************************************************************/
1130
1131 static void iwl4965_unset_hw_params(struct iwl_priv *priv)
1132 {
1133         if (priv->shared_virt)
1134                 pci_free_consistent(priv->pci_dev,
1135                                     sizeof(struct iwl4965_shared),
1136                                     priv->shared_virt,
1137                                     priv->shared_phys);
1138 }
1139
1140 /**
1141  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1142  *
1143  * return : set the bit for each supported rate insert in ie
1144  */
1145 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1146                                     u16 basic_rate, int *left)
1147 {
1148         u16 ret_rates = 0, bit;
1149         int i;
1150         u8 *cnt = ie;
1151         u8 *rates = ie + 1;
1152
1153         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1154                 if (bit & supported_rate) {
1155                         ret_rates |= bit;
1156                         rates[*cnt] = iwl4965_rates[i].ieee |
1157                                 ((bit & basic_rate) ? 0x80 : 0x00);
1158                         (*cnt)++;
1159                         (*left)--;
1160                         if ((*left <= 0) ||
1161                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1162                                 break;
1163                 }
1164         }
1165
1166         return ret_rates;
1167 }
1168
1169 #ifdef CONFIG_IWL4965_HT
1170 static void iwl4965_ht_conf(struct iwl_priv *priv,
1171                             struct ieee80211_bss_conf *bss_conf)
1172 {
1173         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
1174         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
1175         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
1176
1177         IWL_DEBUG_MAC80211("enter: \n");
1178
1179         iwl_conf->is_ht = bss_conf->assoc_ht;
1180
1181         if (!iwl_conf->is_ht)
1182                 return;
1183
1184         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1185
1186         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
1187                 iwl_conf->sgf |= 0x1;
1188         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
1189                 iwl_conf->sgf |= 0x2;
1190
1191         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
1192         iwl_conf->max_amsdu_size =
1193                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
1194
1195         iwl_conf->supported_chan_width =
1196                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
1197         iwl_conf->extension_chan_offset =
1198                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
1199         /* If no above or below channel supplied disable FAT channel */
1200         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
1201             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
1202                 iwl_conf->supported_chan_width = 0;
1203
1204         iwl_conf->tx_mimo_ps_mode =
1205                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1206         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
1207
1208         iwl_conf->control_channel = ht_bss_conf->primary_channel;
1209         iwl_conf->tx_chan_width =
1210                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
1211         iwl_conf->ht_protection =
1212                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
1213         iwl_conf->non_GF_STA_present =
1214                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
1215
1216         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
1217         IWL_DEBUG_MAC80211("leave\n");
1218 }
1219
1220 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1221                         u8 *pos, int *left)
1222 {
1223         struct ieee80211_ht_cap *ht_cap;
1224
1225         if (!sband || !sband->ht_info.ht_supported)
1226                 return;
1227
1228         if (*left < sizeof(struct ieee80211_ht_cap))
1229                 return;
1230
1231         *pos++ = sizeof(struct ieee80211_ht_cap);
1232         ht_cap = (struct ieee80211_ht_cap *) pos;
1233
1234         ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1235         memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1236         ht_cap->ampdu_params_info =
1237                 (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
1238                 ((sband->ht_info.ampdu_density << 2) &
1239                         IEEE80211_HT_CAP_AMPDU_DENSITY);
1240         *left -= sizeof(struct ieee80211_ht_cap);
1241 }
1242 #else
1243 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
1244                                    struct ieee80211_bss_conf *bss_conf)
1245 {
1246 }
1247 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1248                         u8 *pos, int *left)
1249 {
1250 }
1251 #endif
1252
1253
1254 /**
1255  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1256  */
1257 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1258                                   enum ieee80211_band band,
1259                                   struct ieee80211_mgmt *frame,
1260                                   int left, int is_direct)
1261 {
1262         int len = 0;
1263         u8 *pos = NULL;
1264         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1265         const struct ieee80211_supported_band *sband =
1266                                                 iwl_get_hw_mode(priv, band);
1267
1268         /* Make sure there is enough space for the probe request,
1269          * two mandatory IEs and the data */
1270         left -= 24;
1271         if (left < 0)
1272                 return 0;
1273         len += 24;
1274
1275         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1276         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1277         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1278         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1279         frame->seq_ctrl = 0;
1280
1281         /* fill in our indirect SSID IE */
1282         /* ...next IE... */
1283
1284         left -= 2;
1285         if (left < 0)
1286                 return 0;
1287         len += 2;
1288         pos = &(frame->u.probe_req.variable[0]);
1289         *pos++ = WLAN_EID_SSID;
1290         *pos++ = 0;
1291
1292         /* fill in our direct SSID IE... */
1293         if (is_direct) {
1294                 /* ...next IE... */
1295                 left -= 2 + priv->essid_len;
1296                 if (left < 0)
1297                         return 0;
1298                 /* ... fill it in... */
1299                 *pos++ = WLAN_EID_SSID;
1300                 *pos++ = priv->essid_len;
1301                 memcpy(pos, priv->essid, priv->essid_len);
1302                 pos += priv->essid_len;
1303                 len += 2 + priv->essid_len;
1304         }
1305
1306         /* fill in supported rate */
1307         /* ...next IE... */
1308         left -= 2;
1309         if (left < 0)
1310                 return 0;
1311
1312         /* ... fill it in... */
1313         *pos++ = WLAN_EID_SUPP_RATES;
1314         *pos = 0;
1315
1316         /* exclude 60M rate */
1317         active_rates = priv->rates_mask;
1318         active_rates &= ~IWL_RATE_60M_MASK;
1319
1320         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1321
1322         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1323         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1324                         active_rate_basic, &left);
1325         active_rates &= ~ret_rates;
1326
1327         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1328                                  active_rate_basic, &left);
1329         active_rates &= ~ret_rates;
1330
1331         len += 2 + *pos;
1332         pos += (*pos) + 1;
1333         if (active_rates == 0)
1334                 goto fill_end;
1335
1336         /* fill in supported extended rate */
1337         /* ...next IE... */
1338         left -= 2;
1339         if (left < 0)
1340                 return 0;
1341         /* ... fill it in... */
1342         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1343         *pos = 0;
1344         iwl4965_supported_rate_to_ie(pos, active_rates,
1345                                  active_rate_basic, &left);
1346         if (*pos > 0)
1347                 len += 2 + *pos;
1348
1349  fill_end:
1350         /* fill in HT IE */
1351         left -= 2;
1352         if (left < 0)
1353                 return 0;
1354
1355         *pos++ = WLAN_EID_HT_CAPABILITY;
1356         *pos = 0;
1357
1358         iwl_ht_cap_to_ie(sband, pos, &left);
1359
1360         if (*pos > 0)
1361                 len += 2 + *pos;
1362         return (u16)len;
1363 }
1364
1365 /*
1366  * QoS  support
1367 */
1368 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1369                                        struct iwl4965_qosparam_cmd *qos)
1370 {
1371
1372         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1373                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1374 }
1375
1376 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1377 {
1378         unsigned long flags;
1379
1380         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1381                 return;
1382
1383         if (!priv->qos_data.qos_enable)
1384                 return;
1385
1386         spin_lock_irqsave(&priv->lock, flags);
1387         priv->qos_data.def_qos_parm.qos_flags = 0;
1388
1389         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1390             !priv->qos_data.qos_cap.q_AP.txop_request)
1391                 priv->qos_data.def_qos_parm.qos_flags |=
1392                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1393         if (priv->qos_data.qos_active)
1394                 priv->qos_data.def_qos_parm.qos_flags |=
1395                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1396
1397 #ifdef CONFIG_IWL4965_HT
1398         if (priv->current_ht_config.is_ht)
1399                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1400 #endif /* CONFIG_IWL4965_HT */
1401
1402         spin_unlock_irqrestore(&priv->lock, flags);
1403
1404         if (force || iwl_is_associated(priv)) {
1405                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1406                                 priv->qos_data.qos_active,
1407                                 priv->qos_data.def_qos_parm.qos_flags);
1408
1409                 iwl4965_send_qos_params_command(priv,
1410                                 &(priv->qos_data.def_qos_parm));
1411         }
1412 }
1413
1414 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1415 {
1416         /* Filter incoming packets to determine if they are targeted toward
1417          * this network, discarding packets coming from ourselves */
1418         switch (priv->iw_mode) {
1419         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1420                 /* packets from our adapter are dropped (echo) */
1421                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1422                         return 0;
1423                 /* {broad,multi}cast packets to our IBSS go through */
1424                 if (is_multicast_ether_addr(header->addr1))
1425                         return !compare_ether_addr(header->addr3, priv->bssid);
1426                 /* packets to our adapter go through */
1427                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1428         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1429                 /* packets from our adapter are dropped (echo) */
1430                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1431                         return 0;
1432                 /* {broad,multi}cast packets to our BSS go through */
1433                 if (is_multicast_ether_addr(header->addr1))
1434                         return !compare_ether_addr(header->addr2, priv->bssid);
1435                 /* packets to our adapter go through */
1436                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1437         default:
1438                 break;
1439         }
1440
1441         return 1;
1442 }
1443
1444 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1445
1446 static const char *iwl4965_get_tx_fail_reason(u32 status)
1447 {
1448         switch (status & TX_STATUS_MSK) {
1449         case TX_STATUS_SUCCESS:
1450                 return "SUCCESS";
1451                 TX_STATUS_ENTRY(SHORT_LIMIT);
1452                 TX_STATUS_ENTRY(LONG_LIMIT);
1453                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1454                 TX_STATUS_ENTRY(MGMNT_ABORT);
1455                 TX_STATUS_ENTRY(NEXT_FRAG);
1456                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1457                 TX_STATUS_ENTRY(DEST_PS);
1458                 TX_STATUS_ENTRY(ABORTED);
1459                 TX_STATUS_ENTRY(BT_RETRY);
1460                 TX_STATUS_ENTRY(STA_INVALID);
1461                 TX_STATUS_ENTRY(FRAG_DROPPED);
1462                 TX_STATUS_ENTRY(TID_DISABLE);
1463                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1464                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1465                 TX_STATUS_ENTRY(TX_LOCKED);
1466                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1467         }
1468
1469         return "UNKNOWN";
1470 }
1471
1472 /**
1473  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1474  *
1475  * NOTE: priv->mutex is not required before calling this function
1476  */
1477 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1478 {
1479         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1480                 clear_bit(STATUS_SCANNING, &priv->status);
1481                 return 0;
1482         }
1483
1484         if (test_bit(STATUS_SCANNING, &priv->status)) {
1485                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1486                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1487                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1488                         queue_work(priv->workqueue, &priv->abort_scan);
1489
1490                 } else
1491                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1492
1493                 return test_bit(STATUS_SCANNING, &priv->status);
1494         }
1495
1496         return 0;
1497 }
1498
1499 /**
1500  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1501  * @ms: amount of time to wait (in milliseconds) for scan to abort
1502  *
1503  * NOTE: priv->mutex must be held before calling this function
1504  */
1505 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1506 {
1507         unsigned long now = jiffies;
1508         int ret;
1509
1510         ret = iwl4965_scan_cancel(priv);
1511         if (ret && ms) {
1512                 mutex_unlock(&priv->mutex);
1513                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1514                                 test_bit(STATUS_SCANNING, &priv->status))
1515                         msleep(1);
1516                 mutex_lock(&priv->mutex);
1517
1518                 return test_bit(STATUS_SCANNING, &priv->status);
1519         }
1520
1521         return ret;
1522 }
1523
1524 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1525 {
1526         /* Reset ieee stats */
1527
1528         /* We don't reset the net_device_stats (ieee->stats) on
1529          * re-association */
1530
1531         priv->last_seq_num = -1;
1532         priv->last_frag_num = -1;
1533         priv->last_packet_time = 0;
1534
1535         iwl4965_scan_cancel(priv);
1536 }
1537
1538 #define MAX_UCODE_BEACON_INTERVAL       4096
1539 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1540
1541 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1542 {
1543         u16 new_val = 0;
1544         u16 beacon_factor = 0;
1545
1546         beacon_factor =
1547             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1548                 / MAX_UCODE_BEACON_INTERVAL;
1549         new_val = beacon_val / beacon_factor;
1550
1551         return cpu_to_le16(new_val);
1552 }
1553
1554 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1555 {
1556         u64 interval_tm_unit;
1557         u64 tsf, result;
1558         unsigned long flags;
1559         struct ieee80211_conf *conf = NULL;
1560         u16 beacon_int = 0;
1561
1562         conf = ieee80211_get_hw_conf(priv->hw);
1563
1564         spin_lock_irqsave(&priv->lock, flags);
1565         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1566         priv->rxon_timing.timestamp.dw[0] =
1567                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1568
1569         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1570
1571         tsf = priv->timestamp;
1572
1573         beacon_int = priv->beacon_int;
1574         spin_unlock_irqrestore(&priv->lock, flags);
1575
1576         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1577                 if (beacon_int == 0) {
1578                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1579                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1580                 } else {
1581                         priv->rxon_timing.beacon_interval =
1582                                 cpu_to_le16(beacon_int);
1583                         priv->rxon_timing.beacon_interval =
1584                             iwl4965_adjust_beacon_interval(
1585                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1586                 }
1587
1588                 priv->rxon_timing.atim_window = 0;
1589         } else {
1590                 priv->rxon_timing.beacon_interval =
1591                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1592                 /* TODO: we need to get atim_window from upper stack
1593                  * for now we set to 0 */
1594                 priv->rxon_timing.atim_window = 0;
1595         }
1596
1597         interval_tm_unit =
1598                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1599         result = do_div(tsf, interval_tm_unit);
1600         priv->rxon_timing.beacon_init_val =
1601             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1602
1603         IWL_DEBUG_ASSOC
1604             ("beacon interval %d beacon timer %d beacon tim %d\n",
1605                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1606                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1607                 le16_to_cpu(priv->rxon_timing.atim_window));
1608 }
1609
1610 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1611 {
1612         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1613                 IWL_ERROR("APs don't scan.\n");
1614                 return 0;
1615         }
1616
1617         if (!iwl_is_ready_rf(priv)) {
1618                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1619                 return -EIO;
1620         }
1621
1622         if (test_bit(STATUS_SCANNING, &priv->status)) {
1623                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1624                 return -EAGAIN;
1625         }
1626
1627         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1628                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1629                                "Queuing.\n");
1630                 return -EAGAIN;
1631         }
1632
1633         IWL_DEBUG_INFO("Starting scan...\n");
1634         priv->scan_bands = 2;
1635         set_bit(STATUS_SCANNING, &priv->status);
1636         priv->scan_start = jiffies;
1637         priv->scan_pass_start = priv->scan_start;
1638
1639         queue_work(priv->workqueue, &priv->request_scan);
1640
1641         return 0;
1642 }
1643
1644
1645 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1646                                           enum ieee80211_band band)
1647 {
1648         if (band == IEEE80211_BAND_5GHZ) {
1649                 priv->staging_rxon.flags &=
1650                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1651                       | RXON_FLG_CCK_MSK);
1652                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1653         } else {
1654                 /* Copied from iwl4965_post_associate() */
1655                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1656                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1657                 else
1658                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1659
1660                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1661                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1662
1663                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1664                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1665                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1666         }
1667 }
1668
1669 /*
1670  * initialize rxon structure with default values from eeprom
1671  */
1672 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1673 {
1674         const struct iwl_channel_info *ch_info;
1675
1676         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1677
1678         switch (priv->iw_mode) {
1679         case IEEE80211_IF_TYPE_AP:
1680                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1681                 break;
1682
1683         case IEEE80211_IF_TYPE_STA:
1684                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1685                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1686                 break;
1687
1688         case IEEE80211_IF_TYPE_IBSS:
1689                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1690                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1691                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1692                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1693                 break;
1694
1695         case IEEE80211_IF_TYPE_MNTR:
1696                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1697                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1698                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1699                 break;
1700         default:
1701                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1702                 break;
1703         }
1704
1705 #if 0
1706         /* TODO:  Figure out when short_preamble would be set and cache from
1707          * that */
1708         if (!hw_to_local(priv->hw)->short_preamble)
1709                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1710         else
1711                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1712 #endif
1713
1714         ch_info = iwl_get_channel_info(priv, priv->band,
1715                                        le16_to_cpu(priv->staging_rxon.channel));
1716
1717         if (!ch_info)
1718                 ch_info = &priv->channel_info[0];
1719
1720         /*
1721          * in some case A channels are all non IBSS
1722          * in this case force B/G channel
1723          */
1724         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1725             !(is_channel_ibss(ch_info)))
1726                 ch_info = &priv->channel_info[0];
1727
1728         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1729         priv->band = ch_info->band;
1730
1731         iwl4965_set_flags_for_phymode(priv, priv->band);
1732
1733         priv->staging_rxon.ofdm_basic_rates =
1734             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1735         priv->staging_rxon.cck_basic_rates =
1736             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1737
1738         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1739                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1740         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1741         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1742         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1743         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1744         iwl4965_set_rxon_chain(priv);
1745 }
1746
1747 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1748 {
1749         if (mode == IEEE80211_IF_TYPE_IBSS) {
1750                 const struct iwl_channel_info *ch_info;
1751
1752                 ch_info = iwl_get_channel_info(priv,
1753                         priv->band,
1754                         le16_to_cpu(priv->staging_rxon.channel));
1755
1756                 if (!ch_info || !is_channel_ibss(ch_info)) {
1757                         IWL_ERROR("channel %d not IBSS channel\n",
1758                                   le16_to_cpu(priv->staging_rxon.channel));
1759                         return -EINVAL;
1760                 }
1761         }
1762
1763         priv->iw_mode = mode;
1764
1765         iwl4965_connection_init_rx_config(priv);
1766         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1767
1768         iwlcore_clear_stations_table(priv);
1769
1770         /* dont commit rxon if rf-kill is on*/
1771         if (!iwl_is_ready_rf(priv))
1772                 return -EAGAIN;
1773
1774         cancel_delayed_work(&priv->scan_check);
1775         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1776                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1777                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1778                 return -EAGAIN;
1779         }
1780
1781         iwl4965_commit_rxon(priv);
1782
1783         return 0;
1784 }
1785
1786 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1787                                       struct ieee80211_tx_control *ctl,
1788                                       struct iwl_cmd *cmd,
1789                                       struct sk_buff *skb_frag,
1790                                       int sta_id)
1791 {
1792         struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1793         struct iwl_wep_key *wepkey;
1794         int keyidx = 0;
1795
1796         BUG_ON(ctl->hw_key->hw_key_idx > 3);
1797
1798         switch (keyinfo->alg) {
1799         case ALG_CCMP:
1800                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1801                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1802                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1803                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1804                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1805                 break;
1806
1807         case ALG_TKIP:
1808                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1809                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1810                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1811                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1812                 break;
1813
1814         case ALG_WEP:
1815                 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1816                 cmd->cmd.tx.sec_ctl = 0;
1817                 if (priv->default_wep_key) {
1818                         /* the WEP key was sent as static */
1819                         keyidx = ctl->hw_key->hw_key_idx;
1820                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1821                                                         wepkey->key_size);
1822                         if (wepkey->key_size == WEP_KEY_LEN_128)
1823                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1824                 } else {
1825                         /* the WEP key was sent as dynamic */
1826                         keyidx = keyinfo->keyidx;
1827                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1828                                                         keyinfo->keylen);
1829                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1830                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1831                 }
1832
1833                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1834                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1835
1836                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1837                              "with key %d\n", keyidx);
1838                 break;
1839
1840         default:
1841                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1842                 break;
1843         }
1844 }
1845
1846 /*
1847  * handle build REPLY_TX command notification.
1848  */
1849 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1850                                   struct iwl_cmd *cmd,
1851                                   struct ieee80211_tx_control *ctrl,
1852                                   struct ieee80211_hdr *hdr,
1853                                   int is_unicast, u8 std_id)
1854 {
1855         __le16 *qc;
1856         u16 fc = le16_to_cpu(hdr->frame_control);
1857         __le32 tx_flags = cmd->cmd.tx.tx_flags;
1858
1859         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1860         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1861                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1862                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1863                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1864                 if (ieee80211_is_probe_response(fc) &&
1865                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1866                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1867         } else {
1868                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1869                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1870         }
1871
1872         if (ieee80211_is_back_request(fc))
1873                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1874
1875
1876         cmd->cmd.tx.sta_id = std_id;
1877         if (ieee80211_get_morefrag(hdr))
1878                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1879
1880         qc = ieee80211_get_qos_ctrl(hdr);
1881         if (qc) {
1882                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
1883                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1884         } else
1885                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1886
1887         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
1888                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1889                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1890         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
1891                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1892                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1893         }
1894
1895         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1896                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1897
1898         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1899         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1900                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
1901                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
1902                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
1903                 else
1904                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
1905         } else {
1906                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
1907         }
1908
1909         cmd->cmd.tx.driver_txop = 0;
1910         cmd->cmd.tx.tx_flags = tx_flags;
1911         cmd->cmd.tx.next_frame_len = 0;
1912 }
1913 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
1914 {
1915         /* 0 - mgmt, 1 - cnt, 2 - data */
1916         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
1917         priv->tx_stats[idx].cnt++;
1918         priv->tx_stats[idx].bytes += len;
1919 }
1920 /**
1921  * iwl4965_get_sta_id - Find station's index within station table
1922  *
1923  * If new IBSS station, create new entry in station table
1924  */
1925 static int iwl4965_get_sta_id(struct iwl_priv *priv,
1926                                 struct ieee80211_hdr *hdr)
1927 {
1928         int sta_id;
1929         u16 fc = le16_to_cpu(hdr->frame_control);
1930         DECLARE_MAC_BUF(mac);
1931
1932         /* If this frame is broadcast or management, use broadcast station id */
1933         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1934             is_multicast_ether_addr(hdr->addr1))
1935                 return priv->hw_params.bcast_sta_id;
1936
1937         switch (priv->iw_mode) {
1938
1939         /* If we are a client station in a BSS network, use the special
1940          * AP station entry (that's the only station we communicate with) */
1941         case IEEE80211_IF_TYPE_STA:
1942                 return IWL_AP_ID;
1943
1944         /* If we are an AP, then find the station, or use BCAST */
1945         case IEEE80211_IF_TYPE_AP:
1946                 sta_id = iwl_find_station(priv, hdr->addr1);
1947                 if (sta_id != IWL_INVALID_STATION)
1948                         return sta_id;
1949                 return priv->hw_params.bcast_sta_id;
1950
1951         /* If this frame is going out to an IBSS network, find the station,
1952          * or create a new station table entry */
1953         case IEEE80211_IF_TYPE_IBSS:
1954                 sta_id = iwl_find_station(priv, hdr->addr1);
1955                 if (sta_id != IWL_INVALID_STATION)
1956                         return sta_id;
1957
1958                 /* Create new station table entry */
1959                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
1960                                                    0, CMD_ASYNC, NULL);
1961
1962                 if (sta_id != IWL_INVALID_STATION)
1963                         return sta_id;
1964
1965                 IWL_DEBUG_DROP("Station %s not in station map. "
1966                                "Defaulting to broadcast...\n",
1967                                print_mac(mac, hdr->addr1));
1968                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1969                 return priv->hw_params.bcast_sta_id;
1970
1971         default:
1972                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
1973                 return priv->hw_params.bcast_sta_id;
1974         }
1975 }
1976
1977 /*
1978  * start REPLY_TX command process
1979  */
1980 static int iwl4965_tx_skb(struct iwl_priv *priv,
1981                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
1982 {
1983         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1984         struct iwl4965_tfd_frame *tfd;
1985         u32 *control_flags;
1986         int txq_id = ctl->queue;
1987         struct iwl4965_tx_queue *txq = NULL;
1988         struct iwl4965_queue *q = NULL;
1989         dma_addr_t phys_addr;
1990         dma_addr_t txcmd_phys;
1991         dma_addr_t scratch_phys;
1992         struct iwl_cmd *out_cmd = NULL;
1993         u16 len, idx, len_org;
1994         u8 id, hdr_len, unicast;
1995         u8 sta_id;
1996         u16 seq_number = 0;
1997         u16 fc;
1998         __le16 *qc;
1999         u8 wait_write_ptr = 0;
2000         unsigned long flags;
2001         int rc;
2002
2003         spin_lock_irqsave(&priv->lock, flags);
2004         if (iwl_is_rfkill(priv)) {
2005                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2006                 goto drop_unlock;
2007         }
2008
2009         if (!priv->vif) {
2010                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2011                 goto drop_unlock;
2012         }
2013
2014         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2015                 IWL_ERROR("ERROR: No TX rate available.\n");
2016                 goto drop_unlock;
2017         }
2018
2019         unicast = !is_multicast_ether_addr(hdr->addr1);
2020         id = 0;
2021
2022         fc = le16_to_cpu(hdr->frame_control);
2023
2024 #ifdef CONFIG_IWLWIFI_DEBUG
2025         if (ieee80211_is_auth(fc))
2026                 IWL_DEBUG_TX("Sending AUTH frame\n");
2027         else if (ieee80211_is_assoc_request(fc))
2028                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2029         else if (ieee80211_is_reassoc_request(fc))
2030                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2031 #endif
2032
2033         /* drop all data frame if we are not associated */
2034         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2035            (!iwl_is_associated(priv) ||
2036             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2037             !priv->assoc_station_added)) {
2038                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2039                 goto drop_unlock;
2040         }
2041
2042         spin_unlock_irqrestore(&priv->lock, flags);
2043
2044         hdr_len = ieee80211_get_hdrlen(fc);
2045
2046         /* Find (or create) index into station table for destination station */
2047         sta_id = iwl4965_get_sta_id(priv, hdr);
2048         if (sta_id == IWL_INVALID_STATION) {
2049                 DECLARE_MAC_BUF(mac);
2050
2051                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2052                                print_mac(mac, hdr->addr1));
2053                 goto drop;
2054         }
2055
2056         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2057
2058         qc = ieee80211_get_qos_ctrl(hdr);
2059         if (qc) {
2060                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2061                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2062                                 IEEE80211_SCTL_SEQ;
2063                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2064                         (hdr->seq_ctrl &
2065                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2066                 seq_number += 0x10;
2067 #ifdef CONFIG_IWL4965_HT
2068                 /* aggregation is on for this <sta,tid> */
2069                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2070                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2071                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2072 #endif /* CONFIG_IWL4965_HT */
2073         }
2074
2075         /* Descriptor for chosen Tx queue */
2076         txq = &priv->txq[txq_id];
2077         q = &txq->q;
2078
2079         spin_lock_irqsave(&priv->lock, flags);
2080
2081         /* Set up first empty TFD within this queue's circular TFD buffer */
2082         tfd = &txq->bd[q->write_ptr];
2083         memset(tfd, 0, sizeof(*tfd));
2084         control_flags = (u32 *) tfd;
2085         idx = get_cmd_index(q, q->write_ptr, 0);
2086
2087         /* Set up driver data for this TFD */
2088         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2089         txq->txb[q->write_ptr].skb[0] = skb;
2090         memcpy(&(txq->txb[q->write_ptr].status.control),
2091                ctl, sizeof(struct ieee80211_tx_control));
2092
2093         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2094         out_cmd = &txq->cmd[idx];
2095         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2096         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2097
2098         /*
2099          * Set up the Tx-command (not MAC!) header.
2100          * Store the chosen Tx queue and TFD index within the sequence field;
2101          * after Tx, uCode's Tx response will return this value so driver can
2102          * locate the frame within the tx queue and do post-tx processing.
2103          */
2104         out_cmd->hdr.cmd = REPLY_TX;
2105         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2106                                 INDEX_TO_SEQ(q->write_ptr)));
2107
2108         /* Copy MAC header from skb into command buffer */
2109         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2110
2111         /*
2112          * Use the first empty entry in this queue's command buffer array
2113          * to contain the Tx command and MAC header concatenated together
2114          * (payload data will be in another buffer).
2115          * Size of this varies, due to varying MAC header length.
2116          * If end is not dword aligned, we'll have 2 extra bytes at the end
2117          * of the MAC header (device reads on dword boundaries).
2118          * We'll tell device about this padding later.
2119          */
2120         len = priv->hw_params.tx_cmd_len +
2121                 sizeof(struct iwl_cmd_header) + hdr_len;
2122
2123         len_org = len;
2124         len = (len + 3) & ~3;
2125
2126         if (len_org != len)
2127                 len_org = 1;
2128         else
2129                 len_org = 0;
2130
2131         /* Physical address of this Tx command's header (not MAC header!),
2132          * within command buffer array. */
2133         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2134                      offsetof(struct iwl_cmd, hdr);
2135
2136         /* Add buffer containing Tx command and MAC(!) header to TFD's
2137          * first entry */
2138         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2139
2140         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2141                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2142
2143         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2144          * if any (802.11 null frames have no payload). */
2145         len = skb->len - hdr_len;
2146         if (len) {
2147                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2148                                            len, PCI_DMA_TODEVICE);
2149                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2150         }
2151
2152         /* Tell 4965 about any 2-byte padding after MAC header */
2153         if (len_org)
2154                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2155
2156         /* Total # bytes to be transmitted */
2157         len = (u16)skb->len;
2158         out_cmd->cmd.tx.len = cpu_to_le16(len);
2159
2160         /* TODO need this for burst mode later on */
2161         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2162
2163         /* set is_hcca to 0; it probably will never be implemented */
2164         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2165
2166         iwl_update_tx_stats(priv, fc, len);
2167
2168         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2169                 offsetof(struct iwl4965_tx_cmd, scratch);
2170         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2171         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2172
2173         if (!ieee80211_get_morefrag(hdr)) {
2174                 txq->need_update = 1;
2175                 if (qc) {
2176                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2177                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2178                 }
2179         } else {
2180                 wait_write_ptr = 1;
2181                 txq->need_update = 0;
2182         }
2183
2184         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2185                            sizeof(out_cmd->cmd.tx));
2186
2187         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2188                            ieee80211_get_hdrlen(fc));
2189
2190         /* Set up entry for this TFD in Tx byte-count array */
2191         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2192
2193         /* Tell device the write index *just past* this latest filled TFD */
2194         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2195         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2196         spin_unlock_irqrestore(&priv->lock, flags);
2197
2198         if (rc)
2199                 return rc;
2200
2201         if ((iwl4965_queue_space(q) < q->high_mark)
2202             && priv->mac80211_registered) {
2203                 if (wait_write_ptr) {
2204                         spin_lock_irqsave(&priv->lock, flags);
2205                         txq->need_update = 1;
2206                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2207                         spin_unlock_irqrestore(&priv->lock, flags);
2208                 }
2209
2210                 ieee80211_stop_queue(priv->hw, ctl->queue);
2211         }
2212
2213         return 0;
2214
2215 drop_unlock:
2216         spin_unlock_irqrestore(&priv->lock, flags);
2217 drop:
2218         return -1;
2219 }
2220
2221 static void iwl4965_set_rate(struct iwl_priv *priv)
2222 {
2223         const struct ieee80211_supported_band *hw = NULL;
2224         struct ieee80211_rate *rate;
2225         int i;
2226
2227         hw = iwl_get_hw_mode(priv, priv->band);
2228         if (!hw) {
2229                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2230                 return;
2231         }
2232
2233         priv->active_rate = 0;
2234         priv->active_rate_basic = 0;
2235
2236         for (i = 0; i < hw->n_bitrates; i++) {
2237                 rate = &(hw->bitrates[i]);
2238                 if (rate->hw_value < IWL_RATE_COUNT)
2239                         priv->active_rate |= (1 << rate->hw_value);
2240         }
2241
2242         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2243                        priv->active_rate, priv->active_rate_basic);
2244
2245         /*
2246          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2247          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2248          * OFDM
2249          */
2250         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2251                 priv->staging_rxon.cck_basic_rates =
2252                     ((priv->active_rate_basic &
2253                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2254         else
2255                 priv->staging_rxon.cck_basic_rates =
2256                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2257
2258         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2259                 priv->staging_rxon.ofdm_basic_rates =
2260                     ((priv->active_rate_basic &
2261                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2262                       IWL_FIRST_OFDM_RATE) & 0xFF;
2263         else
2264                 priv->staging_rxon.ofdm_basic_rates =
2265                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2266 }
2267
2268 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2269 {
2270         unsigned long flags;
2271
2272         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2273                 return;
2274
2275         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2276                           disable_radio ? "OFF" : "ON");
2277
2278         if (disable_radio) {
2279                 iwl4965_scan_cancel(priv);
2280                 /* FIXME: This is a workaround for AP */
2281                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2282                         spin_lock_irqsave(&priv->lock, flags);
2283                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2284                                     CSR_UCODE_SW_BIT_RFKILL);
2285                         spin_unlock_irqrestore(&priv->lock, flags);
2286                         /* call the host command only if no hw rf-kill set */
2287                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2288                             iwl_is_ready(priv))
2289                                 iwl4965_send_card_state(priv,
2290                                                         CARD_STATE_CMD_DISABLE,
2291                                                         0);
2292                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2293
2294                         /* make sure mac80211 stop sending Tx frame */
2295                         if (priv->mac80211_registered)
2296                                 ieee80211_stop_queues(priv->hw);
2297                 }
2298                 return;
2299         }
2300
2301         spin_lock_irqsave(&priv->lock, flags);
2302         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2303
2304         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2305         spin_unlock_irqrestore(&priv->lock, flags);
2306
2307         /* wake up ucode */
2308         msleep(10);
2309
2310         spin_lock_irqsave(&priv->lock, flags);
2311         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2312         if (!iwl_grab_nic_access(priv))
2313                 iwl_release_nic_access(priv);
2314         spin_unlock_irqrestore(&priv->lock, flags);
2315
2316         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2317                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2318                                   "disabled by HW switch\n");
2319                 return;
2320         }
2321
2322         queue_work(priv->workqueue, &priv->restart);
2323         return;
2324 }
2325
2326 #define IWL_PACKET_RETRY_TIME HZ
2327
2328 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2329 {
2330         u16 sc = le16_to_cpu(header->seq_ctrl);
2331         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2332         u16 frag = sc & IEEE80211_SCTL_FRAG;
2333         u16 *last_seq, *last_frag;
2334         unsigned long *last_time;
2335
2336         switch (priv->iw_mode) {
2337         case IEEE80211_IF_TYPE_IBSS:{
2338                 struct list_head *p;
2339                 struct iwl4965_ibss_seq *entry = NULL;
2340                 u8 *mac = header->addr2;
2341                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2342
2343                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2344                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2345                         if (!compare_ether_addr(entry->mac, mac))
2346                                 break;
2347                 }
2348                 if (p == &priv->ibss_mac_hash[index]) {
2349                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2350                         if (!entry) {
2351                                 IWL_ERROR("Cannot malloc new mac entry\n");
2352                                 return 0;
2353                         }
2354                         memcpy(entry->mac, mac, ETH_ALEN);
2355                         entry->seq_num = seq;
2356                         entry->frag_num = frag;
2357                         entry->packet_time = jiffies;
2358                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2359                         return 0;
2360                 }
2361                 last_seq = &entry->seq_num;
2362                 last_frag = &entry->frag_num;
2363                 last_time = &entry->packet_time;
2364                 break;
2365         }
2366         case IEEE80211_IF_TYPE_STA:
2367                 last_seq = &priv->last_seq_num;
2368                 last_frag = &priv->last_frag_num;
2369                 last_time = &priv->last_packet_time;
2370                 break;
2371         default:
2372                 return 0;
2373         }
2374         if ((*last_seq == seq) &&
2375             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2376                 if (*last_frag == frag)
2377                         goto drop;
2378                 if (*last_frag + 1 != frag)
2379                         /* out-of-order fragment */
2380                         goto drop;
2381         } else
2382                 *last_seq = seq;
2383
2384         *last_frag = frag;
2385         *last_time = jiffies;
2386         return 0;
2387
2388  drop:
2389         return 1;
2390 }
2391
2392 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2393
2394 #include "iwl-spectrum.h"
2395
2396 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2397 #define BEACON_TIME_MASK_HIGH   0xFF000000
2398 #define TIME_UNIT               1024
2399
2400 /*
2401  * extended beacon time format
2402  * time in usec will be changed into a 32-bit value in 8:24 format
2403  * the high 1 byte is the beacon counts
2404  * the lower 3 bytes is the time in usec within one beacon interval
2405  */
2406
2407 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2408 {
2409         u32 quot;
2410         u32 rem;
2411         u32 interval = beacon_interval * 1024;
2412
2413         if (!interval || !usec)
2414                 return 0;
2415
2416         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2417         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2418
2419         return (quot << 24) + rem;
2420 }
2421
2422 /* base is usually what we get from ucode with each received frame,
2423  * the same as HW timer counter counting down
2424  */
2425
2426 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2427 {
2428         u32 base_low = base & BEACON_TIME_MASK_LOW;
2429         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2430         u32 interval = beacon_interval * TIME_UNIT;
2431         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2432             (addon & BEACON_TIME_MASK_HIGH);
2433
2434         if (base_low > addon_low)
2435                 res += base_low - addon_low;
2436         else if (base_low < addon_low) {
2437                 res += interval + base_low - addon_low;
2438                 res += (1 << 24);
2439         } else
2440                 res += (1 << 24);
2441
2442         return cpu_to_le32(res);
2443 }
2444
2445 static int iwl4965_get_measurement(struct iwl_priv *priv,
2446                                struct ieee80211_measurement_params *params,
2447                                u8 type)
2448 {
2449         struct iwl4965_spectrum_cmd spectrum;
2450         struct iwl4965_rx_packet *res;
2451         struct iwl_host_cmd cmd = {
2452                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2453                 .data = (void *)&spectrum,
2454                 .meta.flags = CMD_WANT_SKB,
2455         };
2456         u32 add_time = le64_to_cpu(params->start_time);
2457         int rc;
2458         int spectrum_resp_status;
2459         int duration = le16_to_cpu(params->duration);
2460
2461         if (iwl_is_associated(priv))
2462                 add_time =
2463                     iwl4965_usecs_to_beacons(
2464                         le64_to_cpu(params->start_time) - priv->last_tsf,
2465                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2466
2467         memset(&spectrum, 0, sizeof(spectrum));
2468
2469         spectrum.channel_count = cpu_to_le16(1);
2470         spectrum.flags =
2471             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2472         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2473         cmd.len = sizeof(spectrum);
2474         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2475
2476         if (iwl_is_associated(priv))
2477                 spectrum.start_time =
2478                     iwl4965_add_beacon_time(priv->last_beacon_time,
2479                                 add_time,
2480                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2481         else
2482                 spectrum.start_time = 0;
2483
2484         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2485         spectrum.channels[0].channel = params->channel;
2486         spectrum.channels[0].type = type;
2487         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2488                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2489                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2490
2491         rc = iwl_send_cmd_sync(priv, &cmd);
2492         if (rc)
2493                 return rc;
2494
2495         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2496         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2497                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2498                 rc = -EIO;
2499         }
2500
2501         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2502         switch (spectrum_resp_status) {
2503         case 0:         /* Command will be handled */
2504                 if (res->u.spectrum.id != 0xff) {
2505                         IWL_DEBUG_INFO
2506                             ("Replaced existing measurement: %d\n",
2507                              res->u.spectrum.id);
2508                         priv->measurement_status &= ~MEASUREMENT_READY;
2509                 }
2510                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2511                 rc = 0;
2512                 break;
2513
2514         case 1:         /* Command will not be handled */
2515                 rc = -EAGAIN;
2516                 break;
2517         }
2518
2519         dev_kfree_skb_any(cmd.meta.u.skb);
2520
2521         return rc;
2522 }
2523 #endif
2524
2525 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2526                                  struct iwl4965_tx_info *tx_sta)
2527 {
2528
2529         tx_sta->status.ack_signal = 0;
2530         tx_sta->status.excessive_retries = 0;
2531         tx_sta->status.queue_length = 0;
2532         tx_sta->status.queue_number = 0;
2533
2534         if (in_interrupt())
2535                 ieee80211_tx_status_irqsafe(priv->hw,
2536                                             tx_sta->skb[0], &(tx_sta->status));
2537         else
2538                 ieee80211_tx_status(priv->hw,
2539                                     tx_sta->skb[0], &(tx_sta->status));
2540
2541         tx_sta->skb[0] = NULL;
2542 }
2543
2544 /**
2545  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2546  *
2547  * When FW advances 'R' index, all entries between old and new 'R' index
2548  * need to be reclaimed. As result, some free space forms.  If there is
2549  * enough free space (> low mark), wake the stack that feeds us.
2550  */
2551 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2552 {
2553         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2554         struct iwl4965_queue *q = &txq->q;
2555         int nfreed = 0;
2556
2557         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2558                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2559                           "is out of range [0-%d] %d %d.\n", txq_id,
2560                           index, q->n_bd, q->write_ptr, q->read_ptr);
2561                 return 0;
2562         }
2563
2564         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2565                 q->read_ptr != index;
2566                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2567                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2568                         iwl4965_txstatus_to_ieee(priv,
2569                                         &(txq->txb[txq->q.read_ptr]));
2570                         iwl4965_hw_txq_free_tfd(priv, txq);
2571                 } else if (nfreed > 1) {
2572                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2573                                         q->write_ptr, q->read_ptr);
2574                         queue_work(priv->workqueue, &priv->restart);
2575                 }
2576                 nfreed++;
2577         }
2578
2579 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2580                         (txq_id != IWL_CMD_QUEUE_NUM) &&
2581                         priv->mac80211_registered)
2582                 ieee80211_wake_queue(priv->hw, txq_id); */
2583
2584
2585         return nfreed;
2586 }
2587
2588 static int iwl4965_is_tx_success(u32 status)
2589 {
2590         status &= TX_STATUS_MSK;
2591         return (status == TX_STATUS_SUCCESS)
2592             || (status == TX_STATUS_DIRECT_DONE);
2593 }
2594
2595 /******************************************************************************
2596  *
2597  * Generic RX handler implementations
2598  *
2599  ******************************************************************************/
2600 #ifdef CONFIG_IWL4965_HT
2601
2602 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2603                                     struct ieee80211_hdr *hdr)
2604 {
2605         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2606                 return IWL_AP_ID;
2607         else {
2608                 u8 *da = ieee80211_get_DA(hdr);
2609                 return iwl_find_station(priv, da);
2610         }
2611 }
2612
2613 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2614         struct iwl_priv *priv, int txq_id, int idx)
2615 {
2616         if (priv->txq[txq_id].txb[idx].skb[0])
2617                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2618                                 txb[idx].skb[0]->data;
2619         return NULL;
2620 }
2621
2622 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2623 {
2624         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2625                                 tx_resp->frame_count);
2626         return le32_to_cpu(*scd_ssn) & MAX_SN;
2627
2628 }
2629
2630 /**
2631  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2632  */
2633 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2634                                       struct iwl4965_ht_agg *agg,
2635                                       struct iwl4965_tx_resp_agg *tx_resp,
2636                                       u16 start_idx)
2637 {
2638         u16 status;
2639         struct agg_tx_status *frame_status = &tx_resp->status;
2640         struct ieee80211_tx_status *tx_status = NULL;
2641         struct ieee80211_hdr *hdr = NULL;
2642         int i, sh;
2643         int txq_id, idx;
2644         u16 seq;
2645
2646         if (agg->wait_for_ba)
2647                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2648
2649         agg->frame_count = tx_resp->frame_count;
2650         agg->start_idx = start_idx;
2651         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2652         agg->bitmap = 0;
2653
2654         /* # frames attempted by Tx command */
2655         if (agg->frame_count == 1) {
2656                 /* Only one frame was attempted; no block-ack will arrive */
2657                 status = le16_to_cpu(frame_status[0].status);
2658                 seq  = le16_to_cpu(frame_status[0].sequence);
2659                 idx = SEQ_TO_INDEX(seq);
2660                 txq_id = SEQ_TO_QUEUE(seq);
2661
2662                 /* FIXME: code repetition */
2663                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2664                                    agg->frame_count, agg->start_idx, idx);
2665
2666                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2667                 tx_status->retry_count = tx_resp->failure_frame;
2668                 tx_status->queue_number = status & 0xff;
2669                 tx_status->queue_length = tx_resp->failure_rts;
2670                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2671                 tx_status->flags = iwl4965_is_tx_success(status)?
2672                         IEEE80211_TX_STATUS_ACK : 0;
2673                 iwl4965_hwrate_to_tx_control(priv,
2674                                              le32_to_cpu(tx_resp->rate_n_flags),
2675                                              &tx_status->control);
2676                 /* FIXME: code repetition end */
2677
2678                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2679                                     status & 0xff, tx_resp->failure_frame);
2680                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2681                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2682
2683                 agg->wait_for_ba = 0;
2684         } else {
2685                 /* Two or more frames were attempted; expect block-ack */
2686                 u64 bitmap = 0;
2687                 int start = agg->start_idx;
2688
2689                 /* Construct bit-map of pending frames within Tx window */
2690                 for (i = 0; i < agg->frame_count; i++) {
2691                         u16 sc;
2692                         status = le16_to_cpu(frame_status[i].status);
2693                         seq  = le16_to_cpu(frame_status[i].sequence);
2694                         idx = SEQ_TO_INDEX(seq);
2695                         txq_id = SEQ_TO_QUEUE(seq);
2696
2697                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2698                                       AGG_TX_STATE_ABORT_MSK))
2699                                 continue;
2700
2701                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2702                                            agg->frame_count, txq_id, idx);
2703
2704                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2705
2706                         sc = le16_to_cpu(hdr->seq_ctrl);
2707                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2708                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2709                                           " idx=%d, seq_idx=%d, seq=%d\n",
2710                                           idx, SEQ_TO_SN(sc),
2711                                           hdr->seq_ctrl);
2712                                 return -1;
2713                         }
2714
2715                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2716                                            i, idx, SEQ_TO_SN(sc));
2717
2718                         sh = idx - start;
2719                         if (sh > 64) {
2720                                 sh = (start - idx) + 0xff;
2721                                 bitmap = bitmap << sh;
2722                                 sh = 0;
2723                                 start = idx;
2724                         } else if (sh < -64)
2725                                 sh  = 0xff - (start - idx);
2726                         else if (sh < 0) {
2727                                 sh = start - idx;
2728                                 start = idx;
2729                                 bitmap = bitmap << sh;
2730                                 sh = 0;
2731                         }
2732                         bitmap |= (1 << sh);
2733                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2734                                            start, (u32)(bitmap & 0xFFFFFFFF));
2735                 }
2736
2737                 agg->bitmap = bitmap;
2738                 agg->start_idx = start;
2739                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2740                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2741                                    agg->frame_count, agg->start_idx,
2742                                    (unsigned long long)agg->bitmap);
2743
2744                 if (bitmap)
2745                         agg->wait_for_ba = 1;
2746         }
2747         return 0;
2748 }
2749 #endif
2750
2751 /**
2752  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2753  */
2754 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2755                             struct iwl4965_rx_mem_buffer *rxb)
2756 {
2757         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2758         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2759         int txq_id = SEQ_TO_QUEUE(sequence);
2760         int index = SEQ_TO_INDEX(sequence);
2761         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2762         struct ieee80211_tx_status *tx_status;
2763         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2764         u32  status = le32_to_cpu(tx_resp->status);
2765 #ifdef CONFIG_IWL4965_HT
2766         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2767         struct ieee80211_hdr *hdr;
2768         __le16 *qc;
2769 #endif
2770
2771         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2772                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2773                           "is out of range [0-%d] %d %d\n", txq_id,
2774                           index, txq->q.n_bd, txq->q.write_ptr,
2775                           txq->q.read_ptr);
2776                 return;
2777         }
2778
2779 #ifdef CONFIG_IWL4965_HT
2780         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2781         qc = ieee80211_get_qos_ctrl(hdr);
2782
2783         if (qc)
2784                 tid = le16_to_cpu(*qc) & 0xf;
2785
2786         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2787         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2788                 IWL_ERROR("Station not known\n");
2789                 return;
2790         }
2791
2792         if (txq->sched_retry) {
2793                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2794                 struct iwl4965_ht_agg *agg = NULL;
2795
2796                 if (!qc)
2797                         return;
2798
2799                 agg = &priv->stations[sta_id].tid[tid].agg;
2800
2801                 iwl4965_tx_status_reply_tx(priv, agg,
2802                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2803
2804                 if ((tx_resp->frame_count == 1) &&
2805                     !iwl4965_is_tx_success(status)) {
2806                         /* TODO: send BAR */
2807                 }
2808
2809                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2810                         int freed;
2811                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2812                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2813                                            "%d index %d\n", scd_ssn , index);
2814                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2815                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2816
2817                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2818                             txq_id >= 0 && priv->mac80211_registered &&
2819                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2820                                 ieee80211_wake_queue(priv->hw, txq_id);
2821
2822                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2823                 }
2824         } else {
2825 #endif /* CONFIG_IWL4965_HT */
2826         tx_status = &(txq->txb[txq->q.read_ptr].status);
2827
2828         tx_status->retry_count = tx_resp->failure_frame;
2829         tx_status->queue_number = status;
2830         tx_status->queue_length = tx_resp->bt_kill_count;
2831         tx_status->queue_length |= tx_resp->failure_rts;
2832         tx_status->flags =
2833             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2834         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2835                                      &tx_status->control);
2836
2837         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2838                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2839                      status, le32_to_cpu(tx_resp->rate_n_flags),
2840                      tx_resp->failure_frame);
2841
2842         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2843         if (index != -1) {
2844                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2845 #ifdef CONFIG_IWL4965_HT
2846                 if (tid != MAX_TID_COUNT)
2847                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2848                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2849                         (txq_id >= 0) &&
2850                         priv->mac80211_registered)
2851                         ieee80211_wake_queue(priv->hw, txq_id);
2852                 if (tid != MAX_TID_COUNT)
2853                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2854 #endif
2855         }
2856 #ifdef CONFIG_IWL4965_HT
2857         }
2858 #endif /* CONFIG_IWL4965_HT */
2859
2860         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2861                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2862 }
2863
2864
2865 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2866                                struct iwl4965_rx_mem_buffer *rxb)
2867 {
2868         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2869         struct iwl4965_alive_resp *palive;
2870         struct delayed_work *pwork;
2871
2872         palive = &pkt->u.alive_frame;
2873
2874         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2875                        "0x%01X 0x%01X\n",
2876                        palive->is_valid, palive->ver_type,
2877                        palive->ver_subtype);
2878
2879         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2880                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2881                 memcpy(&priv->card_alive_init,
2882                        &pkt->u.alive_frame,
2883                        sizeof(struct iwl4965_init_alive_resp));
2884                 pwork = &priv->init_alive_start;
2885         } else {
2886                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2887                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2888                        sizeof(struct iwl4965_alive_resp));
2889                 pwork = &priv->alive_start;
2890         }
2891
2892         /* We delay the ALIVE response by 5ms to
2893          * give the HW RF Kill time to activate... */
2894         if (palive->is_valid == UCODE_VALID_OK)
2895                 queue_delayed_work(priv->workqueue, pwork,
2896                                    msecs_to_jiffies(5));
2897         else
2898                 IWL_WARNING("uCode did not respond OK.\n");
2899 }
2900
2901 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2902                                  struct iwl4965_rx_mem_buffer *rxb)
2903 {
2904         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2905
2906         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2907         return;
2908 }
2909
2910 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2911                                struct iwl4965_rx_mem_buffer *rxb)
2912 {
2913         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2914
2915         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2916                 "seq 0x%04X ser 0x%08X\n",
2917                 le32_to_cpu(pkt->u.err_resp.error_type),
2918                 get_cmd_string(pkt->u.err_resp.cmd_id),
2919                 pkt->u.err_resp.cmd_id,
2920                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2921                 le32_to_cpu(pkt->u.err_resp.error_info));
2922 }
2923
2924 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2925
2926 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
2927 {
2928         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2929         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2930         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2931         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2932                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2933         rxon->channel = csa->channel;
2934         priv->staging_rxon.channel = csa->channel;
2935 }
2936
2937 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2938                                           struct iwl4965_rx_mem_buffer *rxb)
2939 {
2940 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2941         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2942         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2943
2944         if (!report->state) {
2945                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2946                           "Spectrum Measure Notification: Start\n");
2947                 return;
2948         }
2949
2950         memcpy(&priv->measure_report, report, sizeof(*report));
2951         priv->measurement_status |= MEASUREMENT_READY;
2952 #endif
2953 }
2954
2955 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2956                                   struct iwl4965_rx_mem_buffer *rxb)
2957 {
2958 #ifdef CONFIG_IWLWIFI_DEBUG
2959         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2960         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2961         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2962                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2963 #endif
2964 }
2965
2966 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2967                                              struct iwl4965_rx_mem_buffer *rxb)
2968 {
2969         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2970         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2971                         "notification for %s:\n",
2972                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2973         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2974 }
2975
2976 static void iwl4965_bg_beacon_update(struct work_struct *work)
2977 {
2978         struct iwl_priv *priv =
2979                 container_of(work, struct iwl_priv, beacon_update);
2980         struct sk_buff *beacon;
2981
2982         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2983         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2984
2985         if (!beacon) {
2986                 IWL_ERROR("update beacon failed\n");
2987                 return;
2988         }
2989
2990         mutex_lock(&priv->mutex);
2991         /* new beacon skb is allocated every time; dispose previous.*/
2992         if (priv->ibss_beacon)
2993                 dev_kfree_skb(priv->ibss_beacon);
2994
2995         priv->ibss_beacon = beacon;
2996         mutex_unlock(&priv->mutex);
2997
2998         iwl4965_send_beacon_cmd(priv);
2999 }
3000
3001 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3002                                 struct iwl4965_rx_mem_buffer *rxb)
3003 {
3004 #ifdef CONFIG_IWLWIFI_DEBUG
3005         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3006         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3007         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3008
3009         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3010                 "tsf %d %d rate %d\n",
3011                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3012                 beacon->beacon_notify_hdr.failure_frame,
3013                 le32_to_cpu(beacon->ibss_mgr_status),
3014                 le32_to_cpu(beacon->high_tsf),
3015                 le32_to_cpu(beacon->low_tsf), rate);
3016 #endif
3017
3018         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3019             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3020                 queue_work(priv->workqueue, &priv->beacon_update);
3021 }
3022
3023 /* Service response to REPLY_SCAN_CMD (0x80) */
3024 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3025                               struct iwl4965_rx_mem_buffer *rxb)
3026 {
3027 #ifdef CONFIG_IWLWIFI_DEBUG
3028         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3029         struct iwl4965_scanreq_notification *notif =
3030             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3031
3032         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3033 #endif
3034 }
3035
3036 /* Service SCAN_START_NOTIFICATION (0x82) */
3037 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3038                                     struct iwl4965_rx_mem_buffer *rxb)
3039 {
3040         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3041         struct iwl4965_scanstart_notification *notif =
3042             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3043         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3044         IWL_DEBUG_SCAN("Scan start: "
3045                        "%d [802.11%s] "
3046                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3047                        notif->channel,
3048                        notif->band ? "bg" : "a",
3049                        notif->tsf_high,
3050                        notif->tsf_low, notif->status, notif->beacon_timer);
3051 }
3052
3053 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3054 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3055                                       struct iwl4965_rx_mem_buffer *rxb)
3056 {
3057         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3058         struct iwl4965_scanresults_notification *notif =
3059             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3060
3061         IWL_DEBUG_SCAN("Scan ch.res: "
3062                        "%d [802.11%s] "
3063                        "(TSF: 0x%08X:%08X) - %d "
3064                        "elapsed=%lu usec (%dms since last)\n",
3065                        notif->channel,
3066                        notif->band ? "bg" : "a",
3067                        le32_to_cpu(notif->tsf_high),
3068                        le32_to_cpu(notif->tsf_low),
3069                        le32_to_cpu(notif->statistics[0]),
3070                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3071                        jiffies_to_msecs(elapsed_jiffies
3072                                         (priv->last_scan_jiffies, jiffies)));
3073
3074         priv->last_scan_jiffies = jiffies;
3075         priv->next_scan_jiffies = 0;
3076 }
3077
3078 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3079 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3080                                        struct iwl4965_rx_mem_buffer *rxb)
3081 {
3082         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3083         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3084
3085         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3086                        scan_notif->scanned_channels,
3087                        scan_notif->tsf_low,
3088                        scan_notif->tsf_high, scan_notif->status);
3089
3090         /* The HW is no longer scanning */
3091         clear_bit(STATUS_SCAN_HW, &priv->status);
3092
3093         /* The scan completion notification came in, so kill that timer... */
3094         cancel_delayed_work(&priv->scan_check);
3095
3096         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3097                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3098                        jiffies_to_msecs(elapsed_jiffies
3099                                         (priv->scan_pass_start, jiffies)));
3100
3101         /* Remove this scanned band from the list
3102          * of pending bands to scan */
3103         priv->scan_bands--;
3104
3105         /* If a request to abort was given, or the scan did not succeed
3106          * then we reset the scan state machine and terminate,
3107          * re-queuing another scan if one has been requested */
3108         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3109                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3110                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3111         } else {
3112                 /* If there are more bands on this scan pass reschedule */
3113                 if (priv->scan_bands > 0)
3114                         goto reschedule;
3115         }
3116
3117         priv->last_scan_jiffies = jiffies;
3118         priv->next_scan_jiffies = 0;
3119         IWL_DEBUG_INFO("Setting scan to off\n");
3120
3121         clear_bit(STATUS_SCANNING, &priv->status);
3122
3123         IWL_DEBUG_INFO("Scan took %dms\n",
3124                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3125
3126         queue_work(priv->workqueue, &priv->scan_completed);
3127
3128         return;
3129
3130 reschedule:
3131         priv->scan_pass_start = jiffies;
3132         queue_work(priv->workqueue, &priv->request_scan);
3133 }
3134
3135 /* Handle notification from uCode that card's power state is changing
3136  * due to software, hardware, or critical temperature RFKILL */
3137 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3138                                     struct iwl4965_rx_mem_buffer *rxb)
3139 {
3140         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3141         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3142         unsigned long status = priv->status;
3143
3144         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3145                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3146                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3147
3148         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3149                      RF_CARD_DISABLED)) {
3150
3151                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3152                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3153
3154                 if (!iwl_grab_nic_access(priv)) {
3155                         iwl_write_direct32(
3156                                 priv, HBUS_TARG_MBX_C,
3157                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3158
3159                         iwl_release_nic_access(priv);
3160                 }
3161
3162                 if (!(flags & RXON_CARD_DISABLED)) {
3163                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3164                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3165                         if (!iwl_grab_nic_access(priv)) {
3166                                 iwl_write_direct32(
3167                                         priv, HBUS_TARG_MBX_C,
3168                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3169
3170                                 iwl_release_nic_access(priv);
3171                         }
3172                 }
3173
3174                 if (flags & RF_CARD_DISABLED) {
3175                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3176                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3177                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3178                         if (!iwl_grab_nic_access(priv))
3179                                 iwl_release_nic_access(priv);
3180                 }
3181         }
3182
3183         if (flags & HW_CARD_DISABLED)
3184                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3185         else
3186                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3187
3188
3189         if (flags & SW_CARD_DISABLED)
3190                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3191         else
3192                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3193
3194         if (!(flags & RXON_CARD_DISABLED))
3195                 iwl4965_scan_cancel(priv);
3196
3197         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3198              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3199             (test_bit(STATUS_RF_KILL_SW, &status) !=
3200              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3201                 queue_work(priv->workqueue, &priv->rf_kill);
3202         else
3203                 wake_up_interruptible(&priv->wait_command_queue);
3204 }
3205
3206 /**
3207  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3208  *
3209  * Setup the RX handlers for each of the reply types sent from the uCode
3210  * to the host.
3211  *
3212  * This function chains into the hardware specific files for them to setup
3213  * any hardware specific handlers as well.
3214  */
3215 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3216 {
3217         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3218         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3219         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3220         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3221         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3222             iwl4965_rx_spectrum_measure_notif;
3223         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3224         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3225             iwl4965_rx_pm_debug_statistics_notif;
3226         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3227
3228         /*
3229          * The same handler is used for both the REPLY to a discrete
3230          * statistics request from the host as well as for the periodic
3231          * statistics notifications (after received beacons) from the uCode.
3232          */
3233         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3234         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3235
3236         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3237         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3238         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3239             iwl4965_rx_scan_results_notif;
3240         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3241             iwl4965_rx_scan_complete_notif;
3242         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3243         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3244
3245         /* Set up hardware specific Rx handlers */
3246         iwl4965_hw_rx_handler_setup(priv);
3247 }
3248
3249 /**
3250  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3251  * @rxb: Rx buffer to reclaim
3252  *
3253  * If an Rx buffer has an async callback associated with it the callback
3254  * will be executed.  The attached skb (if present) will only be freed
3255  * if the callback returns 1
3256  */
3257 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3258                                 struct iwl4965_rx_mem_buffer *rxb)
3259 {
3260         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3261         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3262         int txq_id = SEQ_TO_QUEUE(sequence);
3263         int index = SEQ_TO_INDEX(sequence);
3264         int huge = sequence & SEQ_HUGE_FRAME;
3265         int cmd_index;
3266         struct iwl_cmd *cmd;
3267
3268         /* If a Tx command is being handled and it isn't in the actual
3269          * command queue then there a command routing bug has been introduced
3270          * in the queue management code. */
3271         if (txq_id != IWL_CMD_QUEUE_NUM)
3272                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3273                           txq_id, pkt->hdr.cmd);
3274         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3275
3276         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3277         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3278
3279         /* Input error checking is done when commands are added to queue. */
3280         if (cmd->meta.flags & CMD_WANT_SKB) {
3281                 cmd->meta.source->u.skb = rxb->skb;
3282                 rxb->skb = NULL;
3283         } else if (cmd->meta.u.callback &&
3284                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3285                 rxb->skb = NULL;
3286
3287         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3288
3289         if (!(cmd->meta.flags & CMD_ASYNC)) {
3290                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3291                 wake_up_interruptible(&priv->wait_command_queue);
3292         }
3293 }
3294
3295 /************************** RX-FUNCTIONS ****************************/
3296 /*
3297  * Rx theory of operation
3298  *
3299  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3300  * each of which point to Receive Buffers to be filled by 4965.  These get
3301  * used not only for Rx frames, but for any command response or notification
3302  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3303  * of indexes into the circular buffer.
3304  *
3305  * Rx Queue Indexes
3306  * The host/firmware share two index registers for managing the Rx buffers.
3307  *
3308  * The READ index maps to the first position that the firmware may be writing
3309  * to -- the driver can read up to (but not including) this position and get
3310  * good data.
3311  * The READ index is managed by the firmware once the card is enabled.
3312  *
3313  * The WRITE index maps to the last position the driver has read from -- the
3314  * position preceding WRITE is the last slot the firmware can place a packet.
3315  *
3316  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3317  * WRITE = READ.
3318  *
3319  * During initialization, the host sets up the READ queue position to the first
3320  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3321  *
3322  * When the firmware places a packet in a buffer, it will advance the READ index
3323  * and fire the RX interrupt.  The driver can then query the READ index and
3324  * process as many packets as possible, moving the WRITE index forward as it
3325  * resets the Rx queue buffers with new memory.
3326  *
3327  * The management in the driver is as follows:
3328  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3329  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3330  *   to replenish the iwl->rxq->rx_free.
3331  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3332  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3333  *   'processed' and 'read' driver indexes as well)
3334  * + A received packet is processed and handed to the kernel network stack,
3335  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3336  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3337  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3338  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3339  *   were enough free buffers and RX_STALLED is set it is cleared.
3340  *
3341  *
3342  * Driver sequence:
3343  *
3344  * iwl4965_rx_queue_alloc()   Allocates rx_free
3345  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3346  *                            iwl4965_rx_queue_restock
3347  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3348  *                            queue, updates firmware pointers, and updates
3349  *                            the WRITE index.  If insufficient rx_free buffers
3350  *                            are available, schedules iwl4965_rx_replenish
3351  *
3352  * -- enable interrupts --
3353  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3354  *                            READ INDEX, detaching the SKB from the pool.
3355  *                            Moves the packet buffer from queue to rx_used.
3356  *                            Calls iwl4965_rx_queue_restock to refill any empty
3357  *                            slots.
3358  * ...
3359  *
3360  */
3361
3362 /**
3363  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3364  */
3365 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3366 {
3367         int s = q->read - q->write;
3368         if (s <= 0)
3369                 s += RX_QUEUE_SIZE;
3370         /* keep some buffer to not confuse full and empty queue */
3371         s -= 2;
3372         if (s < 0)
3373                 s = 0;
3374         return s;
3375 }
3376
3377 /**
3378  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3379  */
3380 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3381 {
3382         u32 reg = 0;
3383         int rc = 0;
3384         unsigned long flags;
3385
3386         spin_lock_irqsave(&q->lock, flags);
3387
3388         if (q->need_update == 0)
3389                 goto exit_unlock;
3390
3391         /* If power-saving is in use, make sure device is awake */
3392         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3393                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3394
3395                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3396                         iwl_set_bit(priv, CSR_GP_CNTRL,
3397                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3398                         goto exit_unlock;
3399                 }
3400
3401                 rc = iwl_grab_nic_access(priv);
3402                 if (rc)
3403                         goto exit_unlock;
3404
3405                 /* Device expects a multiple of 8 */
3406                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3407                                      q->write & ~0x7);
3408                 iwl_release_nic_access(priv);
3409
3410         /* Else device is assumed to be awake */
3411         } else
3412                 /* Device expects a multiple of 8 */
3413                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3414
3415
3416         q->need_update = 0;
3417
3418  exit_unlock:
3419         spin_unlock_irqrestore(&q->lock, flags);
3420         return rc;
3421 }
3422
3423 /**
3424  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3425  */
3426 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3427                                           dma_addr_t dma_addr)
3428 {
3429         return cpu_to_le32((u32)(dma_addr >> 8));
3430 }
3431
3432
3433 /**
3434  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3435  *
3436  * If there are slots in the RX queue that need to be restocked,
3437  * and we have free pre-allocated buffers, fill the ranks as much
3438  * as we can, pulling from rx_free.
3439  *
3440  * This moves the 'write' index forward to catch up with 'processed', and
3441  * also updates the memory address in the firmware to reference the new
3442  * target buffer.
3443  */
3444 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3445 {
3446         struct iwl4965_rx_queue *rxq = &priv->rxq;
3447         struct list_head *element;
3448         struct iwl4965_rx_mem_buffer *rxb;
3449         unsigned long flags;
3450         int write, rc;
3451
3452         spin_lock_irqsave(&rxq->lock, flags);
3453         write = rxq->write & ~0x7;
3454         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3455                 /* Get next free Rx buffer, remove from free list */
3456                 element = rxq->rx_free.next;
3457                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3458                 list_del(element);
3459
3460                 /* Point to Rx buffer via next RBD in circular buffer */
3461                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3462                 rxq->queue[rxq->write] = rxb;
3463                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3464                 rxq->free_count--;
3465         }
3466         spin_unlock_irqrestore(&rxq->lock, flags);
3467         /* If the pre-allocated buffer pool is dropping low, schedule to
3468          * refill it */
3469         if (rxq->free_count <= RX_LOW_WATERMARK)
3470                 queue_work(priv->workqueue, &priv->rx_replenish);
3471
3472
3473         /* If we've added more space for the firmware to place data, tell it.
3474          * Increment device's write pointer in multiples of 8. */
3475         if ((write != (rxq->write & ~0x7))
3476             || (abs(rxq->write - rxq->read) > 7)) {
3477                 spin_lock_irqsave(&rxq->lock, flags);
3478                 rxq->need_update = 1;
3479                 spin_unlock_irqrestore(&rxq->lock, flags);
3480                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3481                 if (rc)
3482                         return rc;
3483         }
3484
3485         return 0;
3486 }
3487
3488 /**
3489  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3490  *
3491  * When moving to rx_free an SKB is allocated for the slot.
3492  *
3493  * Also restock the Rx queue via iwl4965_rx_queue_restock.
3494  * This is called as a scheduled work item (except for during initialization)
3495  */
3496 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3497 {
3498         struct iwl4965_rx_queue *rxq = &priv->rxq;
3499         struct list_head *element;
3500         struct iwl4965_rx_mem_buffer *rxb;
3501         unsigned long flags;
3502         spin_lock_irqsave(&rxq->lock, flags);
3503         while (!list_empty(&rxq->rx_used)) {
3504                 element = rxq->rx_used.next;
3505                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3506
3507                 /* Alloc a new receive buffer */
3508                 rxb->skb =
3509                     alloc_skb(priv->hw_params.rx_buf_size,
3510                                 __GFP_NOWARN | GFP_ATOMIC);
3511                 if (!rxb->skb) {
3512                         if (net_ratelimit())
3513                                 printk(KERN_CRIT DRV_NAME
3514                                        ": Can not allocate SKB buffers\n");
3515                         /* We don't reschedule replenish work here -- we will
3516                          * call the restock method and if it still needs
3517                          * more buffers it will schedule replenish */
3518                         break;
3519                 }
3520                 priv->alloc_rxb_skb++;
3521                 list_del(element);
3522
3523                 /* Get physical address of RB/SKB */
3524                 rxb->dma_addr =
3525                     pci_map_single(priv->pci_dev, rxb->skb->data,
3526                            priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3527                 list_add_tail(&rxb->list, &rxq->rx_free);
3528                 rxq->free_count++;
3529         }
3530         spin_unlock_irqrestore(&rxq->lock, flags);
3531 }
3532
3533 /*
3534  * this should be called while priv->lock is locked
3535 */
3536 static void __iwl4965_rx_replenish(void *data)
3537 {
3538         struct iwl_priv *priv = data;
3539
3540         iwl4965_rx_allocate(priv);
3541         iwl4965_rx_queue_restock(priv);
3542 }
3543
3544
3545 void iwl4965_rx_replenish(void *data)
3546 {
3547         struct iwl_priv *priv = data;
3548         unsigned long flags;
3549
3550         iwl4965_rx_allocate(priv);
3551
3552         spin_lock_irqsave(&priv->lock, flags);
3553         iwl4965_rx_queue_restock(priv);
3554         spin_unlock_irqrestore(&priv->lock, flags);
3555 }
3556
3557 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3558  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3559  * This free routine walks the list of POOL entries and if SKB is set to
3560  * non NULL it is unmapped and freed
3561  */
3562 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3563 {
3564         int i;
3565         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3566                 if (rxq->pool[i].skb != NULL) {
3567                         pci_unmap_single(priv->pci_dev,
3568                                          rxq->pool[i].dma_addr,
3569                                          priv->hw_params.rx_buf_size,
3570                                          PCI_DMA_FROMDEVICE);
3571                         dev_kfree_skb(rxq->pool[i].skb);
3572                 }
3573         }
3574
3575         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3576                             rxq->dma_addr);
3577         rxq->bd = NULL;
3578 }
3579
3580 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3581 {
3582         struct iwl4965_rx_queue *rxq = &priv->rxq;
3583         struct pci_dev *dev = priv->pci_dev;
3584         int i;
3585
3586         spin_lock_init(&rxq->lock);
3587         INIT_LIST_HEAD(&rxq->rx_free);
3588         INIT_LIST_HEAD(&rxq->rx_used);
3589
3590         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3591         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3592         if (!rxq->bd)
3593                 return -ENOMEM;
3594
3595         /* Fill the rx_used queue with _all_ of the Rx buffers */
3596         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3597                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3598
3599         /* Set us so that we have processed and used all buffers, but have
3600          * not restocked the Rx queue with fresh buffers */
3601         rxq->read = rxq->write = 0;
3602         rxq->free_count = 0;
3603         rxq->need_update = 0;
3604         return 0;
3605 }
3606
3607 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3608 {
3609         unsigned long flags;
3610         int i;
3611         spin_lock_irqsave(&rxq->lock, flags);
3612         INIT_LIST_HEAD(&rxq->rx_free);
3613         INIT_LIST_HEAD(&rxq->rx_used);
3614         /* Fill the rx_used queue with _all_ of the Rx buffers */
3615         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3616                 /* In the reset function, these buffers may have been allocated
3617                  * to an SKB, so we need to unmap and free potential storage */
3618                 if (rxq->pool[i].skb != NULL) {
3619                         pci_unmap_single(priv->pci_dev,
3620                                          rxq->pool[i].dma_addr,
3621                                          priv->hw_params.rx_buf_size,
3622                                          PCI_DMA_FROMDEVICE);
3623                         priv->alloc_rxb_skb--;
3624                         dev_kfree_skb(rxq->pool[i].skb);
3625                         rxq->pool[i].skb = NULL;
3626                 }
3627                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3628         }
3629
3630         /* Set us so that we have processed and used all buffers, but have
3631          * not restocked the Rx queue with fresh buffers */
3632         rxq->read = rxq->write = 0;
3633         rxq->free_count = 0;
3634         spin_unlock_irqrestore(&rxq->lock, flags);
3635 }
3636
3637 /* Convert linear signal-to-noise ratio into dB */
3638 static u8 ratio2dB[100] = {
3639 /*       0   1   2   3   4   5   6   7   8   9 */
3640          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3641         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3642         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3643         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3644         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3645         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3646         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3647         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3648         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3649         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3650 };
3651
3652 /* Calculates a relative dB value from a ratio of linear
3653  *   (i.e. not dB) signal levels.
3654  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3655 int iwl4965_calc_db_from_ratio(int sig_ratio)
3656 {
3657         /* 1000:1 or higher just report as 60 dB */
3658         if (sig_ratio >= 1000)
3659                 return 60;
3660
3661         /* 100:1 or higher, divide by 10 and use table,
3662          *   add 20 dB to make up for divide by 10 */
3663         if (sig_ratio >= 100)
3664                 return (20 + (int)ratio2dB[sig_ratio/10]);
3665
3666         /* We shouldn't see this */
3667         if (sig_ratio < 1)
3668                 return 0;
3669
3670         /* Use table for ratios 1:1 - 99:1 */
3671         return (int)ratio2dB[sig_ratio];
3672 }
3673
3674 #define PERFECT_RSSI (-20) /* dBm */
3675 #define WORST_RSSI (-95)   /* dBm */
3676 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3677
3678 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3679  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3680  *   about formulas used below. */
3681 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3682 {
3683         int sig_qual;
3684         int degradation = PERFECT_RSSI - rssi_dbm;
3685
3686         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3687          * as indicator; formula is (signal dbm - noise dbm).
3688          * SNR at or above 40 is a great signal (100%).
3689          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3690          * Weakest usable signal is usually 10 - 15 dB SNR. */
3691         if (noise_dbm) {
3692                 if (rssi_dbm - noise_dbm >= 40)
3693                         return 100;
3694                 else if (rssi_dbm < noise_dbm)
3695                         return 0;
3696                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3697
3698         /* Else use just the signal level.
3699          * This formula is a least squares fit of data points collected and
3700          *   compared with a reference system that had a percentage (%) display
3701          *   for signal quality. */
3702         } else
3703                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3704                             (15 * RSSI_RANGE + 62 * degradation)) /
3705                            (RSSI_RANGE * RSSI_RANGE);
3706
3707         if (sig_qual > 100)
3708                 sig_qual = 100;
3709         else if (sig_qual < 1)
3710                 sig_qual = 0;
3711
3712         return sig_qual;
3713 }
3714
3715 /**
3716  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3717  *
3718  * Uses the priv->rx_handlers callback function array to invoke
3719  * the appropriate handlers, including command responses,
3720  * frame-received notifications, and other notifications.
3721  */
3722 static void iwl4965_rx_handle(struct iwl_priv *priv)
3723 {
3724         struct iwl4965_rx_mem_buffer *rxb;
3725         struct iwl4965_rx_packet *pkt;
3726         struct iwl4965_rx_queue *rxq = &priv->rxq;
3727         u32 r, i;
3728         int reclaim;
3729         unsigned long flags;
3730         u8 fill_rx = 0;
3731         u32 count = 8;
3732
3733         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3734          * buffer that the driver may process (last buffer filled by ucode). */
3735         r = iwl4965_hw_get_rx_read(priv);
3736         i = rxq->read;
3737
3738         /* Rx interrupt, but nothing sent from uCode */
3739         if (i == r)
3740                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3741
3742         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3743                 fill_rx = 1;
3744
3745         while (i != r) {
3746                 rxb = rxq->queue[i];
3747
3748                 /* If an RXB doesn't have a Rx queue slot associated with it,
3749                  * then a bug has been introduced in the queue refilling
3750                  * routines -- catch it here */
3751                 BUG_ON(rxb == NULL);
3752
3753                 rxq->queue[i] = NULL;
3754
3755                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3756                                             priv->hw_params.rx_buf_size,
3757                                             PCI_DMA_FROMDEVICE);
3758                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3759
3760                 /* Reclaim a command buffer only if this packet is a response
3761                  *   to a (driver-originated) command.
3762                  * If the packet (e.g. Rx frame) originated from uCode,
3763                  *   there is no command buffer to reclaim.
3764                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3765                  *   but apparently a few don't get set; catch them here. */
3766                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3767                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3768                         (pkt->hdr.cmd != REPLY_RX) &&
3769                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3770                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3771                         (pkt->hdr.cmd != REPLY_TX);
3772
3773                 /* Based on type of command response or notification,
3774                  *   handle those that need handling via function in
3775                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3776                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3777                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3778                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3779                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3780                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3781                 } else {
3782                         /* No handling needed */
3783                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3784                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3785                                 r, i, get_cmd_string(pkt->hdr.cmd),
3786                                 pkt->hdr.cmd);
3787                 }
3788
3789                 if (reclaim) {
3790                         /* Invoke any callbacks, transfer the skb to caller, and
3791                          * fire off the (possibly) blocking iwl_send_cmd()
3792                          * as we reclaim the driver command queue */
3793                         if (rxb && rxb->skb)
3794                                 iwl4965_tx_cmd_complete(priv, rxb);
3795                         else
3796                                 IWL_WARNING("Claim null rxb?\n");
3797                 }
3798
3799                 /* For now we just don't re-use anything.  We can tweak this
3800                  * later to try and re-use notification packets and SKBs that
3801                  * fail to Rx correctly */
3802                 if (rxb->skb != NULL) {
3803                         priv->alloc_rxb_skb--;
3804                         dev_kfree_skb_any(rxb->skb);
3805                         rxb->skb = NULL;
3806                 }
3807
3808                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3809                                  priv->hw_params.rx_buf_size,
3810                                  PCI_DMA_FROMDEVICE);
3811                 spin_lock_irqsave(&rxq->lock, flags);
3812                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3813                 spin_unlock_irqrestore(&rxq->lock, flags);
3814                 i = (i + 1) & RX_QUEUE_MASK;
3815                 /* If there are a lot of unused frames,
3816                  * restock the Rx queue so ucode wont assert. */
3817                 if (fill_rx) {
3818                         count++;
3819                         if (count >= 8) {
3820                                 priv->rxq.read = i;
3821                                 __iwl4965_rx_replenish(priv);
3822                                 count = 0;
3823                         }
3824                 }
3825         }
3826
3827         /* Backtrack one entry */
3828         priv->rxq.read = i;
3829         iwl4965_rx_queue_restock(priv);
3830 }
3831
3832 /**
3833  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3834  */
3835 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3836                                   struct iwl4965_tx_queue *txq)
3837 {
3838         u32 reg = 0;
3839         int rc = 0;
3840         int txq_id = txq->q.id;
3841
3842         if (txq->need_update == 0)
3843                 return rc;
3844
3845         /* if we're trying to save power */
3846         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3847                 /* wake up nic if it's powered down ...
3848                  * uCode will wake up, and interrupt us again, so next
3849                  * time we'll skip this part. */
3850                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3851
3852                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3853                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3854                         iwl_set_bit(priv, CSR_GP_CNTRL,
3855                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3856                         return rc;
3857                 }
3858
3859                 /* restore this queue's parameters in nic hardware. */
3860                 rc = iwl_grab_nic_access(priv);
3861                 if (rc)
3862                         return rc;
3863                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3864                                      txq->q.write_ptr | (txq_id << 8));
3865                 iwl_release_nic_access(priv);
3866
3867         /* else not in power-save mode, uCode will never sleep when we're
3868          * trying to tx (during RFKILL, we're not trying to tx). */
3869         } else
3870                 iwl_write32(priv, HBUS_TARG_WRPTR,
3871                             txq->q.write_ptr | (txq_id << 8));
3872
3873         txq->need_update = 0;
3874
3875         return rc;
3876 }
3877
3878 #ifdef CONFIG_IWLWIFI_DEBUG
3879 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
3880 {
3881         DECLARE_MAC_BUF(mac);
3882
3883         IWL_DEBUG_RADIO("RX CONFIG:\n");
3884         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3885         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3886         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3887         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3888                         le32_to_cpu(rxon->filter_flags));
3889         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3890         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3891                         rxon->ofdm_basic_rates);
3892         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3893         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3894                         print_mac(mac, rxon->node_addr));
3895         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3896                         print_mac(mac, rxon->bssid_addr));
3897         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3898 }
3899 #endif
3900
3901 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3902 {
3903         IWL_DEBUG_ISR("Enabling interrupts\n");
3904         set_bit(STATUS_INT_ENABLED, &priv->status);
3905         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3906 }
3907
3908 /* call this function to flush any scheduled tasklet */
3909 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3910 {
3911         /* wait to make sure we flush pedding tasklet*/
3912         synchronize_irq(priv->pci_dev->irq);
3913         tasklet_kill(&priv->irq_tasklet);
3914 }
3915
3916 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3917 {
3918         clear_bit(STATUS_INT_ENABLED, &priv->status);
3919
3920         /* disable interrupts from uCode/NIC to host */
3921         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3922
3923         /* acknowledge/clear/reset any interrupts still pending
3924          * from uCode or flow handler (Rx/Tx DMA) */
3925         iwl_write32(priv, CSR_INT, 0xffffffff);
3926         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3927         IWL_DEBUG_ISR("Disabled interrupts\n");
3928 }
3929
3930 static const char *desc_lookup(int i)
3931 {
3932         switch (i) {
3933         case 1:
3934                 return "FAIL";
3935         case 2:
3936                 return "BAD_PARAM";
3937         case 3:
3938                 return "BAD_CHECKSUM";
3939         case 4:
3940                 return "NMI_INTERRUPT";
3941         case 5:
3942                 return "SYSASSERT";
3943         case 6:
3944                 return "FATAL_ERROR";
3945         }
3946
3947         return "UNKNOWN";
3948 }
3949
3950 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3951 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3952
3953 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3954 {
3955         u32 data2, line;
3956         u32 desc, time, count, base, data1;
3957         u32 blink1, blink2, ilink1, ilink2;
3958         int rc;
3959
3960         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3961
3962         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3963                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3964                 return;
3965         }
3966
3967         rc = iwl_grab_nic_access(priv);
3968         if (rc) {
3969                 IWL_WARNING("Can not read from adapter at this time.\n");
3970                 return;
3971         }
3972
3973         count = iwl_read_targ_mem(priv, base);
3974
3975         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3976                 IWL_ERROR("Start IWL Error Log Dump:\n");
3977                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3978         }
3979
3980         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3981         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3982         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3983         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3984         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3985         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3986         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3987         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3988         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3989
3990         IWL_ERROR("Desc               Time       "
3991                   "data1      data2      line\n");
3992         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3993                   desc_lookup(desc), desc, time, data1, data2, line);
3994         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
3995         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3996                   ilink1, ilink2);
3997
3998         iwl_release_nic_access(priv);
3999 }
4000
4001 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4002
4003 /**
4004  * iwl4965_print_event_log - Dump error event log to syslog
4005  *
4006  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4007  */
4008 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4009                                 u32 num_events, u32 mode)
4010 {
4011         u32 i;
4012         u32 base;       /* SRAM byte address of event log header */
4013         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4014         u32 ptr;        /* SRAM byte address of log data */
4015         u32 ev, time, data; /* event log data */
4016
4017         if (num_events == 0)
4018                 return;
4019
4020         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4021
4022         if (mode == 0)
4023                 event_size = 2 * sizeof(u32);
4024         else
4025                 event_size = 3 * sizeof(u32);
4026
4027         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4028
4029         /* "time" is actually "data" for mode 0 (no timestamp).
4030          * place event id # at far right for easier visual parsing. */
4031         for (i = 0; i < num_events; i++) {
4032                 ev = iwl_read_targ_mem(priv, ptr);
4033                 ptr += sizeof(u32);
4034                 time = iwl_read_targ_mem(priv, ptr);
4035                 ptr += sizeof(u32);
4036                 if (mode == 0)
4037                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4038                 else {
4039                         data = iwl_read_targ_mem(priv, ptr);
4040                         ptr += sizeof(u32);
4041                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4042                 }
4043         }
4044 }
4045
4046 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4047 {
4048         int rc;
4049         u32 base;       /* SRAM byte address of event log header */
4050         u32 capacity;   /* event log capacity in # entries */
4051         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4052         u32 num_wraps;  /* # times uCode wrapped to top of log */
4053         u32 next_entry; /* index of next entry to be written by uCode */
4054         u32 size;       /* # entries that we'll print */
4055
4056         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4057         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4058                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4059                 return;
4060         }
4061
4062         rc = iwl_grab_nic_access(priv);
4063         if (rc) {
4064                 IWL_WARNING("Can not read from adapter at this time.\n");
4065                 return;
4066         }
4067
4068         /* event log header */
4069         capacity = iwl_read_targ_mem(priv, base);
4070         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4071         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4072         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4073
4074         size = num_wraps ? capacity : next_entry;
4075
4076         /* bail out if nothing in log */
4077         if (size == 0) {
4078                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4079                 iwl_release_nic_access(priv);
4080                 return;
4081         }
4082
4083         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4084                   size, num_wraps);
4085
4086         /* if uCode has wrapped back to top of log, start at the oldest entry,
4087          * i.e the next one that uCode would fill. */
4088         if (num_wraps)
4089                 iwl4965_print_event_log(priv, next_entry,
4090                                     capacity - next_entry, mode);
4091
4092         /* (then/else) start at top of log */
4093         iwl4965_print_event_log(priv, 0, next_entry, mode);
4094
4095         iwl_release_nic_access(priv);
4096 }
4097
4098 /**
4099  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4100  */
4101 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4102 {
4103         /* Set the FW error flag -- cleared on iwl4965_down */
4104         set_bit(STATUS_FW_ERROR, &priv->status);
4105
4106         /* Cancel currently queued command. */
4107         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4108
4109 #ifdef CONFIG_IWLWIFI_DEBUG
4110         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4111                 iwl4965_dump_nic_error_log(priv);
4112                 iwl4965_dump_nic_event_log(priv);
4113                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4114         }
4115 #endif
4116
4117         wake_up_interruptible(&priv->wait_command_queue);
4118
4119         /* Keep the restart process from trying to send host
4120          * commands by clearing the INIT status bit */
4121         clear_bit(STATUS_READY, &priv->status);
4122
4123         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4124                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4125                           "Restarting adapter due to uCode error.\n");
4126
4127                 if (iwl_is_associated(priv)) {
4128                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4129                                sizeof(priv->recovery_rxon));
4130                         priv->error_recovering = 1;
4131                 }
4132                 queue_work(priv->workqueue, &priv->restart);
4133         }
4134 }
4135
4136 static void iwl4965_error_recovery(struct iwl_priv *priv)
4137 {
4138         unsigned long flags;
4139
4140         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4141                sizeof(priv->staging_rxon));
4142         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4143         iwl4965_commit_rxon(priv);
4144
4145         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4146
4147         spin_lock_irqsave(&priv->lock, flags);
4148         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4149         priv->error_recovering = 0;
4150         spin_unlock_irqrestore(&priv->lock, flags);
4151 }
4152
4153 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4154 {
4155         u32 inta, handled = 0;
4156         u32 inta_fh;
4157         unsigned long flags;
4158 #ifdef CONFIG_IWLWIFI_DEBUG
4159         u32 inta_mask;
4160 #endif
4161
4162         spin_lock_irqsave(&priv->lock, flags);
4163
4164         /* Ack/clear/reset pending uCode interrupts.
4165          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4166          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4167         inta = iwl_read32(priv, CSR_INT);
4168         iwl_write32(priv, CSR_INT, inta);
4169
4170         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4171          * Any new interrupts that happen after this, either while we're
4172          * in this tasklet, or later, will show up in next ISR/tasklet. */
4173         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4174         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4175
4176 #ifdef CONFIG_IWLWIFI_DEBUG
4177         if (iwl_debug_level & IWL_DL_ISR) {
4178                 /* just for debug */
4179                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4180                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4181                               inta, inta_mask, inta_fh);
4182         }
4183 #endif
4184
4185         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4186          * atomic, make sure that inta covers all the interrupts that
4187          * we've discovered, even if FH interrupt came in just after
4188          * reading CSR_INT. */
4189         if (inta_fh & CSR49_FH_INT_RX_MASK)
4190                 inta |= CSR_INT_BIT_FH_RX;
4191         if (inta_fh & CSR49_FH_INT_TX_MASK)
4192                 inta |= CSR_INT_BIT_FH_TX;
4193
4194         /* Now service all interrupt bits discovered above. */
4195         if (inta & CSR_INT_BIT_HW_ERR) {
4196                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4197
4198                 /* Tell the device to stop sending interrupts */
4199                 iwl4965_disable_interrupts(priv);
4200
4201                 iwl4965_irq_handle_error(priv);
4202
4203                 handled |= CSR_INT_BIT_HW_ERR;
4204
4205                 spin_unlock_irqrestore(&priv->lock, flags);
4206
4207                 return;
4208         }
4209
4210 #ifdef CONFIG_IWLWIFI_DEBUG
4211         if (iwl_debug_level & (IWL_DL_ISR)) {
4212                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4213                 if (inta & CSR_INT_BIT_SCD)
4214                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4215                                       "the frame/frames.\n");
4216
4217                 /* Alive notification via Rx interrupt will do the real work */
4218                 if (inta & CSR_INT_BIT_ALIVE)
4219                         IWL_DEBUG_ISR("Alive interrupt\n");
4220         }
4221 #endif
4222         /* Safely ignore these bits for debug checks below */
4223         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4224
4225         /* HW RF KILL switch toggled */
4226         if (inta & CSR_INT_BIT_RF_KILL) {
4227                 int hw_rf_kill = 0;
4228                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4229                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4230                         hw_rf_kill = 1;
4231
4232                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4233                                 "RF_KILL bit toggled to %s.\n",
4234                                 hw_rf_kill ? "disable radio":"enable radio");
4235
4236                 /* Queue restart only if RF_KILL switch was set to "kill"
4237                  *   when we loaded driver, and is now set to "enable".
4238                  * After we're Alive, RF_KILL gets handled by
4239                  *   iwl4965_rx_card_state_notif() */
4240                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4241                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4242                         queue_work(priv->workqueue, &priv->restart);
4243                 }
4244
4245                 handled |= CSR_INT_BIT_RF_KILL;
4246         }
4247
4248         /* Chip got too hot and stopped itself */
4249         if (inta & CSR_INT_BIT_CT_KILL) {
4250                 IWL_ERROR("Microcode CT kill error detected.\n");
4251                 handled |= CSR_INT_BIT_CT_KILL;
4252         }
4253
4254         /* Error detected by uCode */
4255         if (inta & CSR_INT_BIT_SW_ERR) {
4256                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4257                           inta);
4258                 iwl4965_irq_handle_error(priv);
4259                 handled |= CSR_INT_BIT_SW_ERR;
4260         }
4261
4262         /* uCode wakes up after power-down sleep */
4263         if (inta & CSR_INT_BIT_WAKEUP) {
4264                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4265                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4266                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4267                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4268                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4269                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4270                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4271                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4272
4273                 handled |= CSR_INT_BIT_WAKEUP;
4274         }
4275
4276         /* All uCode command responses, including Tx command responses,
4277          * Rx "responses" (frame-received notification), and other
4278          * notifications from uCode come through here*/
4279         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4280                 iwl4965_rx_handle(priv);
4281                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4282         }
4283
4284         if (inta & CSR_INT_BIT_FH_TX) {
4285                 IWL_DEBUG_ISR("Tx interrupt\n");
4286                 handled |= CSR_INT_BIT_FH_TX;
4287         }
4288
4289         if (inta & ~handled)
4290                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4291
4292         if (inta & ~CSR_INI_SET_MASK) {
4293                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4294                          inta & ~CSR_INI_SET_MASK);
4295                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4296         }
4297
4298         /* Re-enable all interrupts */
4299         /* only Re-enable if diabled by irq */
4300         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4301                 iwl4965_enable_interrupts(priv);
4302
4303 #ifdef CONFIG_IWLWIFI_DEBUG
4304         if (iwl_debug_level & (IWL_DL_ISR)) {
4305                 inta = iwl_read32(priv, CSR_INT);
4306                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4307                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4308                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4309                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4310         }
4311 #endif
4312         spin_unlock_irqrestore(&priv->lock, flags);
4313 }
4314
4315 static irqreturn_t iwl4965_isr(int irq, void *data)
4316 {
4317         struct iwl_priv *priv = data;
4318         u32 inta, inta_mask;
4319         u32 inta_fh;
4320         if (!priv)
4321                 return IRQ_NONE;
4322
4323         spin_lock(&priv->lock);
4324
4325         /* Disable (but don't clear!) interrupts here to avoid
4326          *    back-to-back ISRs and sporadic interrupts from our NIC.
4327          * If we have something to service, the tasklet will re-enable ints.
4328          * If we *don't* have something, we'll re-enable before leaving here. */
4329         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4330         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4331
4332         /* Discover which interrupts are active/pending */
4333         inta = iwl_read32(priv, CSR_INT);
4334         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4335
4336         /* Ignore interrupt if there's nothing in NIC to service.
4337          * This may be due to IRQ shared with another device,
4338          * or due to sporadic interrupts thrown from our NIC. */
4339         if (!inta && !inta_fh) {
4340                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4341                 goto none;
4342         }
4343
4344         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4345                 /* Hardware disappeared. It might have already raised
4346                  * an interrupt */
4347                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4348                 goto unplugged;
4349         }
4350
4351         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4352                       inta, inta_mask, inta_fh);
4353
4354         inta &= ~CSR_INT_BIT_SCD;
4355
4356         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4357         if (likely(inta || inta_fh))
4358                 tasklet_schedule(&priv->irq_tasklet);
4359
4360  unplugged:
4361         spin_unlock(&priv->lock);
4362         return IRQ_HANDLED;
4363
4364  none:
4365         /* re-enable interrupts here since we don't have anything to service. */
4366         /* only Re-enable if diabled by irq */
4367         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4368                 iwl4965_enable_interrupts(priv);
4369         spin_unlock(&priv->lock);
4370         return IRQ_NONE;
4371 }
4372
4373 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4374  * sending probe req.  This should be set long enough to hear probe responses
4375  * from more than one AP.  */
4376 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4377 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4378
4379 /* For faster active scanning, scan will move to the next channel if fewer than
4380  * PLCP_QUIET_THRESH packets are heard on this channel within
4381  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4382  * time if it's a quiet channel (nothing responded to our probe, and there's
4383  * no other traffic).
4384  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4385 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4386 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4387
4388 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4389  * Must be set longer than active dwell time.
4390  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4391 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4392 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4393 #define IWL_PASSIVE_DWELL_BASE      (100)
4394 #define IWL_CHANNEL_TUNE_TIME       5
4395
4396 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4397                                                 enum ieee80211_band band)
4398 {
4399         if (band == IEEE80211_BAND_5GHZ)
4400                 return IWL_ACTIVE_DWELL_TIME_52;
4401         else
4402                 return IWL_ACTIVE_DWELL_TIME_24;
4403 }
4404
4405 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4406                                           enum ieee80211_band band)
4407 {
4408         u16 active = iwl4965_get_active_dwell_time(priv, band);
4409         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4410             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4411             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4412
4413         if (iwl_is_associated(priv)) {
4414                 /* If we're associated, we clamp the maximum passive
4415                  * dwell time to be 98% of the beacon interval (minus
4416                  * 2 * channel tune time) */
4417                 passive = priv->beacon_int;
4418                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4419                         passive = IWL_PASSIVE_DWELL_BASE;
4420                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4421         }
4422
4423         if (passive <= active)
4424                 passive = active + 1;
4425
4426         return passive;
4427 }
4428
4429 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4430                                          enum ieee80211_band band,
4431                                      u8 is_active, u8 direct_mask,
4432                                      struct iwl4965_scan_channel *scan_ch)
4433 {
4434         const struct ieee80211_channel *channels = NULL;
4435         const struct ieee80211_supported_band *sband;
4436         const struct iwl_channel_info *ch_info;
4437         u16 passive_dwell = 0;
4438         u16 active_dwell = 0;
4439         int added, i;
4440
4441         sband = iwl_get_hw_mode(priv, band);
4442         if (!sband)
4443                 return 0;
4444
4445         channels = sband->channels;
4446
4447         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4448         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4449
4450         for (i = 0, added = 0; i < sband->n_channels; i++) {
4451                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4452                         continue;
4453
4454                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4455
4456                 ch_info = iwl_get_channel_info(priv, band,
4457                                          scan_ch->channel);
4458                 if (!is_channel_valid(ch_info)) {
4459                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4460                                        scan_ch->channel);
4461                         continue;
4462                 }
4463
4464                 if (!is_active || is_channel_passive(ch_info) ||
4465                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4466                         scan_ch->type = 0;      /* passive */
4467                 else
4468                         scan_ch->type = 1;      /* active */
4469
4470                 if (scan_ch->type & 1)
4471                         scan_ch->type |= (direct_mask << 1);
4472
4473                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4474                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4475
4476                 /* Set txpower levels to defaults */
4477                 scan_ch->tpc.dsp_atten = 110;
4478                 /* scan_pwr_info->tpc.dsp_atten; */
4479
4480                 /*scan_pwr_info->tpc.tx_gain; */
4481                 if (band == IEEE80211_BAND_5GHZ)
4482                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4483                 else {
4484                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4485                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4486                          * power level:
4487                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4488                          */
4489                 }
4490
4491                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4492                                scan_ch->channel,
4493                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4494                                (scan_ch->type & 1) ?
4495                                active_dwell : passive_dwell);
4496
4497                 scan_ch++;
4498                 added++;
4499         }
4500
4501         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4502         return added;
4503 }
4504
4505 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4506                               struct ieee80211_rate *rates)
4507 {
4508         int i;
4509
4510         for (i = 0; i < IWL_RATE_COUNT; i++) {
4511                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4512                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4513                 rates[i].hw_value_short = i;
4514                 rates[i].flags = 0;
4515                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4516                         /*
4517                          * If CCK != 1M then set short preamble rate flag.
4518                          */
4519                         rates[i].flags |=
4520                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4521                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
4522                 }
4523         }
4524 }
4525
4526 /**
4527  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4528  */
4529 int iwl4965_init_geos(struct iwl_priv *priv)
4530 {
4531         struct iwl_channel_info *ch;
4532         struct ieee80211_supported_band *sband;
4533         struct ieee80211_channel *channels;
4534         struct ieee80211_channel *geo_ch;
4535         struct ieee80211_rate *rates;
4536         int i = 0;
4537
4538         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4539             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4540                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4541                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4542                 return 0;
4543         }
4544
4545         channels = kzalloc(sizeof(struct ieee80211_channel) *
4546                            priv->channel_count, GFP_KERNEL);
4547         if (!channels)
4548                 return -ENOMEM;
4549
4550         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4551                         GFP_KERNEL);
4552         if (!rates) {
4553                 kfree(channels);
4554                 return -ENOMEM;
4555         }
4556
4557         /* 5.2GHz channels start after the 2.4GHz channels */
4558         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4559         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4560         /* just OFDM */
4561         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4562         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4563
4564         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4565
4566         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4567         sband->channels = channels;
4568         /* OFDM & CCK */
4569         sband->bitrates = rates;
4570         sband->n_bitrates = IWL_RATE_COUNT;
4571
4572         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4573
4574         priv->ieee_channels = channels;
4575         priv->ieee_rates = rates;
4576
4577         iwl4965_init_hw_rates(priv, rates);
4578
4579         for (i = 0;  i < priv->channel_count; i++) {
4580                 ch = &priv->channel_info[i];
4581
4582                 /* FIXME: might be removed if scan is OK */
4583                 if (!is_channel_valid(ch))
4584                         continue;
4585
4586                 if (is_channel_a_band(ch))
4587                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4588                 else
4589                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4590
4591                 geo_ch = &sband->channels[sband->n_channels++];
4592
4593                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4594                 geo_ch->max_power = ch->max_power_avg;
4595                 geo_ch->max_antenna_gain = 0xff;
4596                 geo_ch->hw_value = ch->channel;
4597
4598                 if (is_channel_valid(ch)) {
4599                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4600                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4601
4602                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4603                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4604
4605                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4606                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4607
4608                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4609                                 priv->max_channel_txpower_limit =
4610                                     ch->max_power_avg;
4611                 } else {
4612                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4613                 }
4614
4615                 /* Save flags for reg domain usage */
4616                 geo_ch->orig_flags = geo_ch->flags;
4617
4618                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4619                                 ch->channel, geo_ch->center_freq,
4620                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4621                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4622                                 "restricted" : "valid",
4623                                  geo_ch->flags);
4624         }
4625
4626         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4627              priv->cfg->sku & IWL_SKU_A) {
4628                 printk(KERN_INFO DRV_NAME
4629                        ": Incorrectly detected BG card as ABG.  Please send "
4630                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4631                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4632                 priv->cfg->sku &= ~IWL_SKU_A;
4633         }
4634
4635         printk(KERN_INFO DRV_NAME
4636                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4637                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4638                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4639
4640         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4641                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4642                         &priv->bands[IEEE80211_BAND_2GHZ];
4643         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4644                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4645                         &priv->bands[IEEE80211_BAND_5GHZ];
4646
4647         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4648
4649         return 0;
4650 }
4651
4652 /*
4653  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
4654  */
4655 void iwl4965_free_geos(struct iwl_priv *priv)
4656 {
4657         kfree(priv->ieee_channels);
4658         kfree(priv->ieee_rates);
4659         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4660 }
4661
4662 /******************************************************************************
4663  *
4664  * uCode download functions
4665  *
4666  ******************************************************************************/
4667
4668 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4669 {
4670         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4671         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4672         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4673         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4674         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4675         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4676 }
4677
4678 /**
4679  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
4680  *     looking at all data.
4681  */
4682 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
4683                                  u32 len)
4684 {
4685         u32 val;
4686         u32 save_len = len;
4687         int rc = 0;
4688         u32 errcnt;
4689
4690         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4691
4692         rc = iwl_grab_nic_access(priv);
4693         if (rc)
4694                 return rc;
4695
4696         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
4697
4698         errcnt = 0;
4699         for (; len > 0; len -= sizeof(u32), image++) {
4700                 /* read data comes through single port, auto-incr addr */
4701                 /* NOTE: Use the debugless read so we don't flood kernel log
4702                  * if IWL_DL_IO is set */
4703                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4704                 if (val != le32_to_cpu(*image)) {
4705                         IWL_ERROR("uCode INST section is invalid at "
4706                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4707                                   save_len - len, val, le32_to_cpu(*image));
4708                         rc = -EIO;
4709                         errcnt++;
4710                         if (errcnt >= 20)
4711                                 break;
4712                 }
4713         }
4714
4715         iwl_release_nic_access(priv);
4716
4717         if (!errcnt)
4718                 IWL_DEBUG_INFO
4719                     ("ucode image in INSTRUCTION memory is good\n");
4720
4721         return rc;
4722 }
4723
4724
4725 /**
4726  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
4727  *   using sample data 100 bytes apart.  If these sample points are good,
4728  *   it's a pretty good bet that everything between them is good, too.
4729  */
4730 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4731 {
4732         u32 val;
4733         int rc = 0;
4734         u32 errcnt = 0;
4735         u32 i;
4736
4737         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4738
4739         rc = iwl_grab_nic_access(priv);
4740         if (rc)
4741                 return rc;
4742
4743         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4744                 /* read data comes through single port, auto-incr addr */
4745                 /* NOTE: Use the debugless read so we don't flood kernel log
4746                  * if IWL_DL_IO is set */
4747                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4748                         i + RTC_INST_LOWER_BOUND);
4749                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4750                 if (val != le32_to_cpu(*image)) {
4751 #if 0 /* Enable this if you want to see details */
4752                         IWL_ERROR("uCode INST section is invalid at "
4753                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4754                                   i, val, *image);
4755 #endif
4756                         rc = -EIO;
4757                         errcnt++;
4758                         if (errcnt >= 3)
4759                                 break;
4760                 }
4761         }
4762
4763         iwl_release_nic_access(priv);
4764
4765         return rc;
4766 }
4767
4768
4769 /**
4770  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
4771  *    and verify its contents
4772  */
4773 static int iwl4965_verify_ucode(struct iwl_priv *priv)
4774 {
4775         __le32 *image;
4776         u32 len;
4777         int rc = 0;
4778
4779         /* Try bootstrap */
4780         image = (__le32 *)priv->ucode_boot.v_addr;
4781         len = priv->ucode_boot.len;
4782         rc = iwl4965_verify_inst_sparse(priv, image, len);
4783         if (rc == 0) {
4784                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
4785                 return 0;
4786         }
4787
4788         /* Try initialize */
4789         image = (__le32 *)priv->ucode_init.v_addr;
4790         len = priv->ucode_init.len;
4791         rc = iwl4965_verify_inst_sparse(priv, image, len);
4792         if (rc == 0) {
4793                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
4794                 return 0;
4795         }
4796
4797         /* Try runtime/protocol */
4798         image = (__le32 *)priv->ucode_code.v_addr;
4799         len = priv->ucode_code.len;
4800         rc = iwl4965_verify_inst_sparse(priv, image, len);
4801         if (rc == 0) {
4802                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
4803                 return 0;
4804         }
4805
4806         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
4807
4808         /* Since nothing seems to match, show first several data entries in
4809          * instruction SRAM, so maybe visual inspection will give a clue.
4810          * Selection of bootstrap image (vs. other images) is arbitrary. */
4811         image = (__le32 *)priv->ucode_boot.v_addr;
4812         len = priv->ucode_boot.len;
4813         rc = iwl4965_verify_inst_full(priv, image, len);
4814
4815         return rc;
4816 }
4817
4818 static void iwl4965_nic_start(struct iwl_priv *priv)
4819 {
4820         /* Remove all resets to allow NIC to operate */
4821         iwl_write32(priv, CSR_RESET, 0);
4822 }
4823
4824
4825 /**
4826  * iwl4965_read_ucode - Read uCode images from disk file.
4827  *
4828  * Copy into buffers for card to fetch via bus-mastering
4829  */
4830 static int iwl4965_read_ucode(struct iwl_priv *priv)
4831 {
4832         struct iwl4965_ucode *ucode;
4833         int ret;
4834         const struct firmware *ucode_raw;
4835         const char *name = priv->cfg->fw_name;
4836         u8 *src;
4837         size_t len;
4838         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4839
4840         /* Ask kernel firmware_class module to get the boot firmware off disk.
4841          * request_firmware() is synchronous, file is in memory on return. */
4842         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4843         if (ret < 0) {
4844                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4845                                         name, ret);
4846                 goto error;
4847         }
4848
4849         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4850                        name, ucode_raw->size);
4851
4852         /* Make sure that we got at least our header! */
4853         if (ucode_raw->size < sizeof(*ucode)) {
4854                 IWL_ERROR("File size way too small!\n");
4855                 ret = -EINVAL;
4856                 goto err_release;
4857         }
4858
4859         /* Data from ucode file:  header followed by uCode images */
4860         ucode = (void *)ucode_raw->data;
4861
4862         ver = le32_to_cpu(ucode->ver);
4863         inst_size = le32_to_cpu(ucode->inst_size);
4864         data_size = le32_to_cpu(ucode->data_size);
4865         init_size = le32_to_cpu(ucode->init_size);
4866         init_data_size = le32_to_cpu(ucode->init_data_size);
4867         boot_size = le32_to_cpu(ucode->boot_size);
4868
4869         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4870         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4871                        inst_size);
4872         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4873                        data_size);
4874         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4875                        init_size);
4876         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4877                        init_data_size);
4878         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4879                        boot_size);
4880
4881         /* Verify size of file vs. image size info in file's header */
4882         if (ucode_raw->size < sizeof(*ucode) +
4883                 inst_size + data_size + init_size +
4884                 init_data_size + boot_size) {
4885
4886                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4887                                (int)ucode_raw->size);
4888                 ret = -EINVAL;
4889                 goto err_release;
4890         }
4891
4892         /* Verify that uCode images will fit in card's SRAM */
4893         if (inst_size > priv->hw_params.max_inst_size) {
4894                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4895                                inst_size);
4896                 ret = -EINVAL;
4897                 goto err_release;
4898         }
4899
4900         if (data_size > priv->hw_params.max_data_size) {
4901                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4902                                 data_size);
4903                 ret = -EINVAL;
4904                 goto err_release;
4905         }
4906         if (init_size > priv->hw_params.max_inst_size) {
4907                 IWL_DEBUG_INFO
4908                     ("uCode init instr len %d too large to fit in\n",
4909                       init_size);
4910                 ret = -EINVAL;
4911                 goto err_release;
4912         }
4913         if (init_data_size > priv->hw_params.max_data_size) {
4914                 IWL_DEBUG_INFO
4915                     ("uCode init data len %d too large to fit in\n",
4916                       init_data_size);
4917                 ret = -EINVAL;
4918                 goto err_release;
4919         }
4920         if (boot_size > priv->hw_params.max_bsm_size) {
4921                 IWL_DEBUG_INFO
4922                     ("uCode boot instr len %d too large to fit in\n",
4923                       boot_size);
4924                 ret = -EINVAL;
4925                 goto err_release;
4926         }
4927
4928         /* Allocate ucode buffers for card's bus-master loading ... */
4929
4930         /* Runtime instructions and 2 copies of data:
4931          * 1) unmodified from disk
4932          * 2) backup cache for save/restore during power-downs */
4933         priv->ucode_code.len = inst_size;
4934         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4935
4936         priv->ucode_data.len = data_size;
4937         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4938
4939         priv->ucode_data_backup.len = data_size;
4940         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4941
4942         /* Initialization instructions and data */
4943         if (init_size && init_data_size) {
4944                 priv->ucode_init.len = init_size;
4945                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4946
4947                 priv->ucode_init_data.len = init_data_size;
4948                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4949
4950                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4951                         goto err_pci_alloc;
4952         }
4953
4954         /* Bootstrap (instructions only, no data) */
4955         if (boot_size) {
4956                 priv->ucode_boot.len = boot_size;
4957                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4958
4959                 if (!priv->ucode_boot.v_addr)
4960                         goto err_pci_alloc;
4961         }
4962
4963         /* Copy images into buffers for card's bus-master reads ... */
4964
4965         /* Runtime instructions (first block of data in file) */
4966         src = &ucode->data[0];
4967         len = priv->ucode_code.len;
4968         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4969         memcpy(priv->ucode_code.v_addr, src, len);
4970         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4971                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4972
4973         /* Runtime data (2nd block)
4974          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
4975         src = &ucode->data[inst_size];
4976         len = priv->ucode_data.len;
4977         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4978         memcpy(priv->ucode_data.v_addr, src, len);
4979         memcpy(priv->ucode_data_backup.v_addr, src, len);
4980
4981         /* Initialization instructions (3rd block) */
4982         if (init_size) {
4983                 src = &ucode->data[inst_size + data_size];
4984                 len = priv->ucode_init.len;
4985                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4986                                 len);
4987                 memcpy(priv->ucode_init.v_addr, src, len);
4988         }
4989
4990         /* Initialization data (4th block) */
4991         if (init_data_size) {
4992                 src = &ucode->data[inst_size + data_size + init_size];
4993                 len = priv->ucode_init_data.len;
4994                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4995                                len);
4996                 memcpy(priv->ucode_init_data.v_addr, src, len);
4997         }
4998
4999         /* Bootstrap instructions (5th block) */
5000         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5001         len = priv->ucode_boot.len;
5002         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5003         memcpy(priv->ucode_boot.v_addr, src, len);
5004
5005         /* We have our copies now, allow OS release its copies */
5006         release_firmware(ucode_raw);
5007         return 0;
5008
5009  err_pci_alloc:
5010         IWL_ERROR("failed to allocate pci memory\n");
5011         ret = -ENOMEM;
5012         iwl4965_dealloc_ucode_pci(priv);
5013
5014  err_release:
5015         release_firmware(ucode_raw);
5016
5017  error:
5018         return ret;
5019 }
5020
5021
5022 /**
5023  * iwl4965_set_ucode_ptrs - Set uCode address location
5024  *
5025  * Tell initialization uCode where to find runtime uCode.
5026  *
5027  * BSM registers initially contain pointers to initialization uCode.
5028  * We need to replace them to load runtime uCode inst and data,
5029  * and to save runtime data when powering down.
5030  */
5031 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5032 {
5033         dma_addr_t pinst;
5034         dma_addr_t pdata;
5035         int rc = 0;
5036         unsigned long flags;
5037
5038         /* bits 35:4 for 4965 */
5039         pinst = priv->ucode_code.p_addr >> 4;
5040         pdata = priv->ucode_data_backup.p_addr >> 4;
5041
5042         spin_lock_irqsave(&priv->lock, flags);
5043         rc = iwl_grab_nic_access(priv);
5044         if (rc) {
5045                 spin_unlock_irqrestore(&priv->lock, flags);
5046                 return rc;
5047         }
5048
5049         /* Tell bootstrap uCode where to find image to load */
5050         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5051         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5052         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5053                                  priv->ucode_data.len);
5054
5055         /* Inst bytecount must be last to set up, bit 31 signals uCode
5056          *   that all new ptr/size info is in place */
5057         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5058                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5059
5060         iwl_release_nic_access(priv);
5061
5062         spin_unlock_irqrestore(&priv->lock, flags);
5063
5064         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5065
5066         return rc;
5067 }
5068
5069 /**
5070  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5071  *
5072  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5073  *
5074  * The 4965 "initialize" ALIVE reply contains calibration data for:
5075  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
5076  *   (3945 does not contain this data).
5077  *
5078  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5079 */
5080 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5081 {
5082         /* Check alive response for "valid" sign from uCode */
5083         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5084                 /* We had an error bringing up the hardware, so take it
5085                  * all the way back down so we can try again */
5086                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5087                 goto restart;
5088         }
5089
5090         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5091          * This is a paranoid check, because we would not have gotten the
5092          * "initialize" alive if code weren't properly loaded.  */
5093         if (iwl4965_verify_ucode(priv)) {
5094                 /* Runtime instruction load was bad;
5095                  * take it all the way back down so we can try again */
5096                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5097                 goto restart;
5098         }
5099
5100         /* Calculate temperature */
5101         priv->temperature = iwl4965_get_temperature(priv);
5102
5103         /* Send pointers to protocol/runtime uCode image ... init code will
5104          * load and launch runtime uCode, which will send us another "Alive"
5105          * notification. */
5106         IWL_DEBUG_INFO("Initialization Alive received.\n");
5107         if (iwl4965_set_ucode_ptrs(priv)) {
5108                 /* Runtime instruction load won't happen;
5109                  * take it all the way back down so we can try again */
5110                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5111                 goto restart;
5112         }
5113         return;
5114
5115  restart:
5116         queue_work(priv->workqueue, &priv->restart);
5117 }
5118
5119
5120 /**
5121  * iwl4965_alive_start - called after REPLY_ALIVE notification received
5122  *                   from protocol/runtime uCode (initialization uCode's
5123  *                   Alive gets handled by iwl4965_init_alive_start()).
5124  */
5125 static void iwl4965_alive_start(struct iwl_priv *priv)
5126 {
5127         int ret = 0;
5128
5129         IWL_DEBUG_INFO("Runtime Alive received.\n");
5130
5131         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5132                 /* We had an error bringing up the hardware, so take it
5133                  * all the way back down so we can try again */
5134                 IWL_DEBUG_INFO("Alive failed.\n");
5135                 goto restart;
5136         }
5137
5138         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5139          * This is a paranoid check, because we would not have gotten the
5140          * "runtime" alive if code weren't properly loaded.  */
5141         if (iwl4965_verify_ucode(priv)) {
5142                 /* Runtime instruction load was bad;
5143                  * take it all the way back down so we can try again */
5144                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5145                 goto restart;
5146         }
5147
5148         iwlcore_clear_stations_table(priv);
5149
5150         ret = priv->cfg->ops->lib->alive_notify(priv);
5151         if (ret) {
5152                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5153                             ret);
5154                 goto restart;
5155         }
5156
5157         /* After the ALIVE response, we can send host commands to 4965 uCode */
5158         set_bit(STATUS_ALIVE, &priv->status);
5159
5160         /* Clear out the uCode error bit if it is set */
5161         clear_bit(STATUS_FW_ERROR, &priv->status);
5162
5163         if (iwl_is_rfkill(priv))
5164                 return;
5165
5166         ieee80211_start_queues(priv->hw);
5167
5168         priv->active_rate = priv->rates_mask;
5169         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5170
5171         if (iwl_is_associated(priv)) {
5172                 struct iwl4965_rxon_cmd *active_rxon =
5173                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5174
5175                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5176                        sizeof(priv->staging_rxon));
5177                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5178         } else {
5179                 /* Initialize our rx_config data */
5180                 iwl4965_connection_init_rx_config(priv);
5181                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5182         }
5183
5184         /* Configure Bluetooth device coexistence support */
5185         iwl4965_send_bt_config(priv);
5186
5187         /* Configure the adapter for unassociated operation */
5188         iwl4965_commit_rxon(priv);
5189
5190         /* At this point, the NIC is initialized and operational */
5191         priv->notif_missed_beacons = 0;
5192
5193         iwl4965_rf_kill_ct_config(priv);
5194
5195         iwl_leds_register(priv);
5196
5197         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5198         set_bit(STATUS_READY, &priv->status);
5199         wake_up_interruptible(&priv->wait_command_queue);
5200
5201         if (priv->error_recovering)
5202                 iwl4965_error_recovery(priv);
5203
5204         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5205         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5206         return;
5207
5208  restart:
5209         queue_work(priv->workqueue, &priv->restart);
5210 }
5211
5212 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5213
5214 static void __iwl4965_down(struct iwl_priv *priv)
5215 {
5216         unsigned long flags;
5217         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5218         struct ieee80211_conf *conf = NULL;
5219
5220         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5221
5222         conf = ieee80211_get_hw_conf(priv->hw);
5223
5224         if (!exit_pending)
5225                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5226
5227         iwl_leds_unregister(priv);
5228
5229         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5230
5231         iwlcore_clear_stations_table(priv);
5232
5233         /* Unblock any waiting calls */
5234         wake_up_interruptible_all(&priv->wait_command_queue);
5235
5236         /* Wipe out the EXIT_PENDING status bit if we are not actually
5237          * exiting the module */
5238         if (!exit_pending)
5239                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5240
5241         /* stop and reset the on-board processor */
5242         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5243
5244         /* tell the device to stop sending interrupts */
5245         spin_lock_irqsave(&priv->lock, flags);
5246         iwl4965_disable_interrupts(priv);
5247         spin_unlock_irqrestore(&priv->lock, flags);
5248         iwl_synchronize_irq(priv);
5249
5250         if (priv->mac80211_registered)
5251                 ieee80211_stop_queues(priv->hw);
5252
5253         /* If we have not previously called iwl4965_init() then
5254          * clear all bits but the RF Kill and SUSPEND bits and return */
5255         if (!iwl_is_init(priv)) {
5256                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5257                                         STATUS_RF_KILL_HW |
5258                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5259                                         STATUS_RF_KILL_SW |
5260                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5261                                         STATUS_GEO_CONFIGURED |
5262                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5263                                         STATUS_IN_SUSPEND;
5264                 goto exit;
5265         }
5266
5267         /* ...otherwise clear out all the status bits but the RF Kill and
5268          * SUSPEND bits and continue taking the NIC down. */
5269         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5270                                 STATUS_RF_KILL_HW |
5271                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5272                                 STATUS_RF_KILL_SW |
5273                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5274                                 STATUS_GEO_CONFIGURED |
5275                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5276                                 STATUS_IN_SUSPEND |
5277                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5278                                 STATUS_FW_ERROR;
5279
5280         spin_lock_irqsave(&priv->lock, flags);
5281         iwl_clear_bit(priv, CSR_GP_CNTRL,
5282                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5283         spin_unlock_irqrestore(&priv->lock, flags);
5284
5285         iwl4965_hw_txq_ctx_stop(priv);
5286         iwl4965_hw_rxq_stop(priv);
5287
5288         spin_lock_irqsave(&priv->lock, flags);
5289         if (!iwl_grab_nic_access(priv)) {
5290                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5291                                          APMG_CLK_VAL_DMA_CLK_RQT);
5292                 iwl_release_nic_access(priv);
5293         }
5294         spin_unlock_irqrestore(&priv->lock, flags);
5295
5296         udelay(5);
5297
5298         iwl4965_hw_nic_stop_master(priv);
5299         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5300         iwl4965_hw_nic_reset(priv);
5301
5302  exit:
5303         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5304
5305         if (priv->ibss_beacon)
5306                 dev_kfree_skb(priv->ibss_beacon);
5307         priv->ibss_beacon = NULL;
5308
5309         /* clear out any free frames */
5310         iwl4965_clear_free_frames(priv);
5311 }
5312
5313 static void iwl4965_down(struct iwl_priv *priv)
5314 {
5315         mutex_lock(&priv->mutex);
5316         __iwl4965_down(priv);
5317         mutex_unlock(&priv->mutex);
5318
5319         iwl4965_cancel_deferred_work(priv);
5320 }
5321
5322 #define MAX_HW_RESTARTS 5
5323
5324 static int __iwl4965_up(struct iwl_priv *priv)
5325 {
5326         int i;
5327         int ret;
5328
5329         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5330                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5331                 return -EIO;
5332         }
5333
5334         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5335                 IWL_WARNING("Radio disabled by SW RF kill (module "
5336                             "parameter)\n");
5337                 iwl_rfkill_set_hw_state(priv);
5338                 return -ENODEV;
5339         }
5340
5341         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5342                 IWL_ERROR("ucode not available for device bringup\n");
5343                 return -EIO;
5344         }
5345
5346         /* If platform's RF_KILL switch is NOT set to KILL */
5347         if (iwl_read32(priv, CSR_GP_CNTRL) &
5348                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5349                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5350         else {
5351                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5352                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5353                         iwl_rfkill_set_hw_state(priv);
5354                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5355                         return -ENODEV;
5356                 }
5357         }
5358
5359         iwl_rfkill_set_hw_state(priv);
5360         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5361
5362         ret = priv->cfg->ops->lib->hw_nic_init(priv);
5363         if (ret) {
5364                 IWL_ERROR("Unable to init nic\n");
5365                 return ret;
5366         }
5367
5368         /* make sure rfkill handshake bits are cleared */
5369         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5370         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5371                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5372
5373         /* clear (again), then enable host interrupts */
5374         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5375         iwl4965_enable_interrupts(priv);
5376
5377         /* really make sure rfkill handshake bits are cleared */
5378         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5379         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5380
5381         /* Copy original ucode data image from disk into backup cache.
5382          * This will be used to initialize the on-board processor's
5383          * data SRAM for a clean start when the runtime program first loads. */
5384         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5385                priv->ucode_data.len);
5386
5387         /* We return success when we resume from suspend and rf_kill is on. */
5388         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5389                 return 0;
5390
5391         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5392
5393                 iwlcore_clear_stations_table(priv);
5394
5395                 /* load bootstrap state machine,
5396                  * load bootstrap program into processor's memory,
5397                  * prepare to load the "initialize" uCode */
5398                 ret = priv->cfg->ops->lib->load_ucode(priv);
5399
5400                 if (ret) {
5401                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5402                         continue;
5403                 }
5404
5405                 /* start card; "initialize" will load runtime ucode */
5406                 iwl4965_nic_start(priv);
5407
5408                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5409
5410                 return 0;
5411         }
5412
5413         set_bit(STATUS_EXIT_PENDING, &priv->status);
5414         __iwl4965_down(priv);
5415
5416         /* tried to restart and config the device for as long as our
5417          * patience could withstand */
5418         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5419         return -EIO;
5420 }
5421
5422
5423 /*****************************************************************************
5424  *
5425  * Workqueue callbacks
5426  *
5427  *****************************************************************************/
5428
5429 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5430 {
5431         struct iwl_priv *priv =
5432             container_of(data, struct iwl_priv, init_alive_start.work);
5433
5434         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5435                 return;
5436
5437         mutex_lock(&priv->mutex);
5438         iwl4965_init_alive_start(priv);
5439         mutex_unlock(&priv->mutex);
5440 }
5441
5442 static void iwl4965_bg_alive_start(struct work_struct *data)
5443 {
5444         struct iwl_priv *priv =
5445             container_of(data, struct iwl_priv, alive_start.work);
5446
5447         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5448                 return;
5449
5450         mutex_lock(&priv->mutex);
5451         iwl4965_alive_start(priv);
5452         mutex_unlock(&priv->mutex);
5453 }
5454
5455 static void iwl4965_bg_rf_kill(struct work_struct *work)
5456 {
5457         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5458
5459         wake_up_interruptible(&priv->wait_command_queue);
5460
5461         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5462                 return;
5463
5464         mutex_lock(&priv->mutex);
5465
5466         if (!iwl_is_rfkill(priv)) {
5467                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5468                           "HW and/or SW RF Kill no longer active, restarting "
5469                           "device\n");
5470                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5471                         queue_work(priv->workqueue, &priv->restart);
5472         } else {
5473                 /* make sure mac80211 stop sending Tx frame */
5474                 if (priv->mac80211_registered)
5475                         ieee80211_stop_queues(priv->hw);
5476
5477                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5478                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5479                                           "disabled by SW switch\n");
5480                 else
5481                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5482                                     "Kill switch must be turned off for "
5483                                     "wireless networking to work.\n");
5484         }
5485         iwl_rfkill_set_hw_state(priv);
5486
5487         mutex_unlock(&priv->mutex);
5488 }
5489
5490 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5491
5492 static void iwl4965_bg_scan_check(struct work_struct *data)
5493 {
5494         struct iwl_priv *priv =
5495             container_of(data, struct iwl_priv, scan_check.work);
5496
5497         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5498                 return;
5499
5500         mutex_lock(&priv->mutex);
5501         if (test_bit(STATUS_SCANNING, &priv->status) ||
5502             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5503                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5504                           "Scan completion watchdog resetting adapter (%dms)\n",
5505                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5506
5507                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5508                         iwl4965_send_scan_abort(priv);
5509         }
5510         mutex_unlock(&priv->mutex);
5511 }
5512
5513 static void iwl4965_bg_request_scan(struct work_struct *data)
5514 {
5515         struct iwl_priv *priv =
5516             container_of(data, struct iwl_priv, request_scan);
5517         struct iwl_host_cmd cmd = {
5518                 .id = REPLY_SCAN_CMD,
5519                 .len = sizeof(struct iwl4965_scan_cmd),
5520                 .meta.flags = CMD_SIZE_HUGE,
5521         };
5522         struct iwl4965_scan_cmd *scan;
5523         struct ieee80211_conf *conf = NULL;
5524         u16 cmd_len;
5525         enum ieee80211_band band;
5526         u8 direct_mask;
5527         int ret = 0;
5528
5529         conf = ieee80211_get_hw_conf(priv->hw);
5530
5531         mutex_lock(&priv->mutex);
5532
5533         if (!iwl_is_ready(priv)) {
5534                 IWL_WARNING("request scan called when driver not ready.\n");
5535                 goto done;
5536         }
5537
5538         /* Make sure the scan wasn't cancelled before this queued work
5539          * was given the chance to run... */
5540         if (!test_bit(STATUS_SCANNING, &priv->status))
5541                 goto done;
5542
5543         /* This should never be called or scheduled if there is currently
5544          * a scan active in the hardware. */
5545         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5546                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5547                                "Ignoring second request.\n");
5548                 ret = -EIO;
5549                 goto done;
5550         }
5551
5552         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5553                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5554                 goto done;
5555         }
5556
5557         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5558                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5559                 goto done;
5560         }
5561
5562         if (iwl_is_rfkill(priv)) {
5563                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5564                 goto done;
5565         }
5566
5567         if (!test_bit(STATUS_READY, &priv->status)) {
5568                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5569                 goto done;
5570         }
5571
5572         if (!priv->scan_bands) {
5573                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5574                 goto done;
5575         }
5576
5577         if (!priv->scan) {
5578                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5579                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5580                 if (!priv->scan) {
5581                         ret = -ENOMEM;
5582                         goto done;
5583                 }
5584         }
5585         scan = priv->scan;
5586         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5587
5588         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5589         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5590
5591         if (iwl_is_associated(priv)) {
5592                 u16 interval = 0;
5593                 u32 extra;
5594                 u32 suspend_time = 100;
5595                 u32 scan_suspend_time = 100;
5596                 unsigned long flags;
5597
5598                 IWL_DEBUG_INFO("Scanning while associated...\n");
5599
5600                 spin_lock_irqsave(&priv->lock, flags);
5601                 interval = priv->beacon_int;
5602                 spin_unlock_irqrestore(&priv->lock, flags);
5603
5604                 scan->suspend_time = 0;
5605                 scan->max_out_time = cpu_to_le32(200 * 1024);
5606                 if (!interval)
5607                         interval = suspend_time;
5608
5609                 extra = (suspend_time / interval) << 22;
5610                 scan_suspend_time = (extra |
5611                     ((suspend_time % interval) * 1024));
5612                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5613                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5614                                scan_suspend_time, interval);
5615         }
5616
5617         /* We should add the ability for user to lock to PASSIVE ONLY */
5618         if (priv->one_direct_scan) {
5619                 IWL_DEBUG_SCAN
5620                     ("Kicking off one direct scan for '%s'\n",
5621                      iwl4965_escape_essid(priv->direct_ssid,
5622                                       priv->direct_ssid_len));
5623                 scan->direct_scan[0].id = WLAN_EID_SSID;
5624                 scan->direct_scan[0].len = priv->direct_ssid_len;
5625                 memcpy(scan->direct_scan[0].ssid,
5626                        priv->direct_ssid, priv->direct_ssid_len);
5627                 direct_mask = 1;
5628         } else if (!iwl_is_associated(priv) && priv->essid_len) {
5629                 IWL_DEBUG_SCAN
5630                   ("Kicking off one direct scan for '%s' when not associated\n",
5631                    iwl4965_escape_essid(priv->essid, priv->essid_len));
5632                 scan->direct_scan[0].id = WLAN_EID_SSID;
5633                 scan->direct_scan[0].len = priv->essid_len;
5634                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5635                 direct_mask = 1;
5636         } else {
5637                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5638                 direct_mask = 0;
5639         }
5640
5641         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5642         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5643         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5644
5645
5646         switch (priv->scan_bands) {
5647         case 2:
5648                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5649                 scan->tx_cmd.rate_n_flags =
5650                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5651                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5652
5653                 scan->good_CRC_th = 0;
5654                 band = IEEE80211_BAND_2GHZ;
5655                 break;
5656
5657         case 1:
5658                 scan->tx_cmd.rate_n_flags =
5659                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5660                                 RATE_MCS_ANT_B_MSK);
5661                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5662                 band = IEEE80211_BAND_5GHZ;
5663                 break;
5664
5665         default:
5666                 IWL_WARNING("Invalid scan band count\n");
5667                 goto done;
5668         }
5669
5670         /* We don't build a direct scan probe request; the uCode will do
5671          * that based on the direct_mask added to each channel entry */
5672         cmd_len = iwl4965_fill_probe_req(priv, band,
5673                                         (struct ieee80211_mgmt *)scan->data,
5674                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5675
5676         scan->tx_cmd.len = cpu_to_le16(cmd_len);
5677         /* select Rx chains */
5678
5679         /* Force use of chains B and C (0x6) for scan Rx.
5680          * Avoid A (0x1) because of its off-channel reception on A-band.
5681          * MIMO is not used here, but value is required to make uCode happy. */
5682         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5683                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5684                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5685                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5686
5687         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5688                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5689
5690         if (direct_mask)
5691                 scan->channel_count =
5692                         iwl4965_get_channels_for_scan(
5693                                 priv, band, 1, /* active */
5694                                 direct_mask,
5695                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5696         else
5697                 scan->channel_count =
5698                         iwl4965_get_channels_for_scan(
5699                                 priv, band, 0, /* passive */
5700                                 direct_mask,
5701                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5702
5703         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5704                                RXON_FILTER_BCON_AWARE_MSK);
5705         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5706             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5707         cmd.data = scan;
5708         scan->len = cpu_to_le16(cmd.len);
5709
5710         set_bit(STATUS_SCAN_HW, &priv->status);
5711         ret = iwl_send_cmd_sync(priv, &cmd);
5712         if (ret)
5713                 goto done;
5714
5715         queue_delayed_work(priv->workqueue, &priv->scan_check,
5716                            IWL_SCAN_CHECK_WATCHDOG);
5717
5718         mutex_unlock(&priv->mutex);
5719         return;
5720
5721  done:
5722         /* inform mac80211 scan aborted */
5723         queue_work(priv->workqueue, &priv->scan_completed);
5724         mutex_unlock(&priv->mutex);
5725 }
5726
5727 static void iwl4965_bg_up(struct work_struct *data)
5728 {
5729         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5730
5731         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5732                 return;
5733
5734         mutex_lock(&priv->mutex);
5735         __iwl4965_up(priv);
5736         mutex_unlock(&priv->mutex);
5737 }
5738
5739 static void iwl4965_bg_restart(struct work_struct *data)
5740 {
5741         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5742
5743         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5744                 return;
5745
5746         iwl4965_down(priv);
5747         queue_work(priv->workqueue, &priv->up);
5748 }
5749
5750 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5751 {
5752         struct iwl_priv *priv =
5753             container_of(data, struct iwl_priv, rx_replenish);
5754
5755         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5756                 return;
5757
5758         mutex_lock(&priv->mutex);
5759         iwl4965_rx_replenish(priv);
5760         mutex_unlock(&priv->mutex);
5761 }
5762
5763 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5764
5765 static void iwl4965_post_associate(struct iwl_priv *priv)
5766 {
5767         struct ieee80211_conf *conf = NULL;
5768         int ret = 0;
5769         DECLARE_MAC_BUF(mac);
5770
5771         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5772                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5773                 return;
5774         }
5775
5776         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5777                         priv->assoc_id,
5778                         print_mac(mac, priv->active_rxon.bssid_addr));
5779
5780
5781         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5782                 return;
5783
5784
5785         if (!priv->vif || !priv->is_open)
5786                 return;
5787
5788         iwl4965_scan_cancel_timeout(priv, 200);
5789
5790         conf = ieee80211_get_hw_conf(priv->hw);
5791
5792         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5793         iwl4965_commit_rxon(priv);
5794
5795         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5796         iwl4965_setup_rxon_timing(priv);
5797         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5798                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5799         if (ret)
5800                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5801                             "Attempting to continue.\n");
5802
5803         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5804
5805 #ifdef CONFIG_IWL4965_HT
5806         if (priv->current_ht_config.is_ht)
5807                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5808 #endif /* CONFIG_IWL4965_HT*/
5809         iwl4965_set_rxon_chain(priv);
5810         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5811
5812         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5813                         priv->assoc_id, priv->beacon_int);
5814
5815         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5816                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5817         else
5818                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5819
5820         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5821                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5822                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5823                 else
5824                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5825
5826                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5827                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5828
5829         }
5830
5831         iwl4965_commit_rxon(priv);
5832
5833         switch (priv->iw_mode) {
5834         case IEEE80211_IF_TYPE_STA:
5835                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5836                 break;
5837
5838         case IEEE80211_IF_TYPE_IBSS:
5839
5840                 /* clear out the station table */
5841                 iwlcore_clear_stations_table(priv);
5842
5843                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5844                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5845                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5846                 iwl4965_send_beacon_cmd(priv);
5847
5848                 break;
5849
5850         default:
5851                 IWL_ERROR("%s Should not be called in %d mode\n",
5852                                 __FUNCTION__, priv->iw_mode);
5853                 break;
5854         }
5855
5856         iwl4965_sequence_reset(priv);
5857
5858         /* Enable Rx differential gain and sensitivity calibrations */
5859         iwl_chain_noise_reset(priv);
5860         priv->start_calib = 1;
5861
5862         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5863                 priv->assoc_station_added = 1;
5864
5865         iwl4965_activate_qos(priv, 0);
5866
5867         iwl_power_update_mode(priv, 0);
5868         /* we have just associated, don't start scan too early */
5869         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5870 }
5871
5872
5873 static void iwl4965_bg_post_associate(struct work_struct *data)
5874 {
5875         struct iwl_priv *priv = container_of(data, struct iwl_priv,
5876                                              post_associate.work);
5877
5878         mutex_lock(&priv->mutex);
5879         iwl4965_post_associate(priv);
5880         mutex_unlock(&priv->mutex);
5881
5882 }
5883
5884 static void iwl4965_bg_abort_scan(struct work_struct *work)
5885 {
5886         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5887
5888         if (!iwl_is_ready(priv))
5889                 return;
5890
5891         mutex_lock(&priv->mutex);
5892
5893         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5894         iwl4965_send_scan_abort(priv);
5895
5896         mutex_unlock(&priv->mutex);
5897 }
5898
5899 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5900
5901 static void iwl4965_bg_scan_completed(struct work_struct *work)
5902 {
5903         struct iwl_priv *priv =
5904             container_of(work, struct iwl_priv, scan_completed);
5905
5906         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5907
5908         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5909                 return;
5910
5911         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5912                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5913
5914         ieee80211_scan_completed(priv->hw);
5915
5916         /* Since setting the TXPOWER may have been deferred while
5917          * performing the scan, fire one off */
5918         mutex_lock(&priv->mutex);
5919         iwl4965_hw_reg_send_txpower(priv);
5920         mutex_unlock(&priv->mutex);
5921 }
5922
5923 /*****************************************************************************
5924  *
5925  * mac80211 entry point functions
5926  *
5927  *****************************************************************************/
5928
5929 #define UCODE_READY_TIMEOUT     (2 * HZ)
5930
5931 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5932 {
5933         struct iwl_priv *priv = hw->priv;
5934         int ret;
5935
5936         IWL_DEBUG_MAC80211("enter\n");
5937
5938         if (pci_enable_device(priv->pci_dev)) {
5939                 IWL_ERROR("Fail to pci_enable_device\n");
5940                 return -ENODEV;
5941         }
5942         pci_restore_state(priv->pci_dev);
5943         pci_enable_msi(priv->pci_dev);
5944
5945         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5946                           DRV_NAME, priv);
5947         if (ret) {
5948                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5949                 goto out_disable_msi;
5950         }
5951
5952         /* we should be verifying the device is ready to be opened */
5953         mutex_lock(&priv->mutex);
5954
5955         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5956         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5957          * ucode filename and max sizes are card-specific. */
5958
5959         if (!priv->ucode_code.len) {
5960                 ret = iwl4965_read_ucode(priv);
5961                 if (ret) {
5962                         IWL_ERROR("Could not read microcode: %d\n", ret);
5963                         mutex_unlock(&priv->mutex);
5964                         goto out_release_irq;
5965                 }
5966         }
5967
5968         ret = __iwl4965_up(priv);
5969
5970         mutex_unlock(&priv->mutex);
5971
5972         if (ret)
5973                 goto out_release_irq;
5974
5975         IWL_DEBUG_INFO("Start UP work done.\n");
5976
5977         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5978                 return 0;
5979
5980         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5981          * mac80211 will not be run successfully. */
5982         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5983                         test_bit(STATUS_READY, &priv->status),
5984                         UCODE_READY_TIMEOUT);
5985         if (!ret) {
5986                 if (!test_bit(STATUS_READY, &priv->status)) {
5987                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5988                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
5989                         ret = -ETIMEDOUT;
5990                         goto out_release_irq;
5991                 }
5992         }
5993
5994         priv->is_open = 1;
5995         IWL_DEBUG_MAC80211("leave\n");
5996         return 0;
5997
5998 out_release_irq:
5999         free_irq(priv->pci_dev->irq, priv);
6000 out_disable_msi:
6001         pci_disable_msi(priv->pci_dev);
6002         pci_disable_device(priv->pci_dev);
6003         priv->is_open = 0;
6004         IWL_DEBUG_MAC80211("leave - failed\n");
6005         return ret;
6006 }
6007
6008 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6009 {
6010         struct iwl_priv *priv = hw->priv;
6011
6012         IWL_DEBUG_MAC80211("enter\n");
6013
6014         if (!priv->is_open) {
6015                 IWL_DEBUG_MAC80211("leave - skip\n");
6016                 return;
6017         }
6018
6019         priv->is_open = 0;
6020
6021         if (iwl_is_ready_rf(priv)) {
6022                 /* stop mac, cancel any scan request and clear
6023                  * RXON_FILTER_ASSOC_MSK BIT
6024                  */
6025                 mutex_lock(&priv->mutex);
6026                 iwl4965_scan_cancel_timeout(priv, 100);
6027                 cancel_delayed_work(&priv->post_associate);
6028                 mutex_unlock(&priv->mutex);
6029         }
6030
6031         iwl4965_down(priv);
6032
6033         flush_workqueue(priv->workqueue);
6034         free_irq(priv->pci_dev->irq, priv);
6035         pci_disable_msi(priv->pci_dev);
6036         pci_save_state(priv->pci_dev);
6037         pci_disable_device(priv->pci_dev);
6038
6039         IWL_DEBUG_MAC80211("leave\n");
6040 }
6041
6042 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6043                       struct ieee80211_tx_control *ctl)
6044 {
6045         struct iwl_priv *priv = hw->priv;
6046
6047         IWL_DEBUG_MAC80211("enter\n");
6048
6049         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6050                 IWL_DEBUG_MAC80211("leave - monitor\n");
6051                 return -1;
6052         }
6053
6054         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6055                      ctl->tx_rate->bitrate);
6056
6057         if (iwl4965_tx_skb(priv, skb, ctl))
6058                 dev_kfree_skb_any(skb);
6059
6060         IWL_DEBUG_MAC80211("leave\n");
6061         return 0;
6062 }
6063
6064 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6065                                  struct ieee80211_if_init_conf *conf)
6066 {
6067         struct iwl_priv *priv = hw->priv;
6068         unsigned long flags;
6069         DECLARE_MAC_BUF(mac);
6070
6071         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6072
6073         if (priv->vif) {
6074                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6075                 return -EOPNOTSUPP;
6076         }
6077
6078         spin_lock_irqsave(&priv->lock, flags);
6079         priv->vif = conf->vif;
6080
6081         spin_unlock_irqrestore(&priv->lock, flags);
6082
6083         mutex_lock(&priv->mutex);
6084
6085         if (conf->mac_addr) {
6086                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6087                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6088         }
6089
6090         if (iwl_is_ready(priv))
6091                 iwl4965_set_mode(priv, conf->type);
6092
6093         mutex_unlock(&priv->mutex);
6094
6095         IWL_DEBUG_MAC80211("leave\n");
6096         return 0;
6097 }
6098
6099 /**
6100  * iwl4965_mac_config - mac80211 config callback
6101  *
6102  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6103  * be set inappropriately and the driver currently sets the hardware up to
6104  * use it whenever needed.
6105  */
6106 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6107 {
6108         struct iwl_priv *priv = hw->priv;
6109         const struct iwl_channel_info *ch_info;
6110         unsigned long flags;
6111         int ret = 0;
6112
6113         mutex_lock(&priv->mutex);
6114         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6115
6116         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6117
6118         if (!iwl_is_ready(priv)) {
6119                 IWL_DEBUG_MAC80211("leave - not ready\n");
6120                 ret = -EIO;
6121                 goto out;
6122         }
6123
6124         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6125                      test_bit(STATUS_SCANNING, &priv->status))) {
6126                 IWL_DEBUG_MAC80211("leave - scanning\n");
6127                 set_bit(STATUS_CONF_PENDING, &priv->status);
6128                 mutex_unlock(&priv->mutex);
6129                 return 0;
6130         }
6131
6132         spin_lock_irqsave(&priv->lock, flags);
6133
6134         ch_info = iwl_get_channel_info(priv, conf->channel->band,
6135                         ieee80211_frequency_to_channel(conf->channel->center_freq));
6136         if (!is_channel_valid(ch_info)) {
6137                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6138                 spin_unlock_irqrestore(&priv->lock, flags);
6139                 ret = -EINVAL;
6140                 goto out;
6141         }
6142
6143 #ifdef CONFIG_IWL4965_HT
6144         /* if we are switching from ht to 2.4 clear flags
6145          * from any ht related info since 2.4 does not
6146          * support ht */
6147         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6148 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6149             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6150 #endif
6151         )
6152                 priv->staging_rxon.flags = 0;
6153 #endif /* CONFIG_IWL4965_HT */
6154
6155         iwlcore_set_rxon_channel(priv, conf->channel->band,
6156                 ieee80211_frequency_to_channel(conf->channel->center_freq));
6157
6158         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6159
6160         /* The list of supported rates and rate mask can be different
6161          * for each band; since the band may have changed, reset
6162          * the rate mask to what mac80211 lists */
6163         iwl4965_set_rate(priv);
6164
6165         spin_unlock_irqrestore(&priv->lock, flags);
6166
6167 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6168         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6169                 iwl4965_hw_channel_switch(priv, conf->channel);
6170                 goto out;
6171         }
6172 #endif
6173
6174         if (priv->cfg->ops->lib->radio_kill_sw)
6175                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6176
6177         if (!conf->radio_enabled) {
6178                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6179                 goto out;
6180         }
6181
6182         if (iwl_is_rfkill(priv)) {
6183                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6184                 ret = -EIO;
6185                 goto out;
6186         }
6187
6188         iwl4965_set_rate(priv);
6189
6190         if (memcmp(&priv->active_rxon,
6191                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6192                 iwl4965_commit_rxon(priv);
6193         else
6194                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6195
6196         IWL_DEBUG_MAC80211("leave\n");
6197
6198 out:
6199         clear_bit(STATUS_CONF_PENDING, &priv->status);
6200         mutex_unlock(&priv->mutex);
6201         return ret;
6202 }
6203
6204 static void iwl4965_config_ap(struct iwl_priv *priv)
6205 {
6206         int ret = 0;
6207
6208         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6209                 return;
6210
6211         /* The following should be done only at AP bring up */
6212         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6213
6214                 /* RXON - unassoc (to set timing command) */
6215                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6216                 iwl4965_commit_rxon(priv);
6217
6218                 /* RXON Timing */
6219                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6220                 iwl4965_setup_rxon_timing(priv);
6221                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6222                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6223                 if (ret)
6224                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6225                                         "Attempting to continue.\n");
6226
6227                 iwl4965_set_rxon_chain(priv);
6228
6229                 /* FIXME: what should be the assoc_id for AP? */
6230                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6231                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6232                         priv->staging_rxon.flags |=
6233                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6234                 else
6235                         priv->staging_rxon.flags &=
6236                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6237
6238                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6239                         if (priv->assoc_capability &
6240                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6241                                 priv->staging_rxon.flags |=
6242                                         RXON_FLG_SHORT_SLOT_MSK;
6243                         else
6244                                 priv->staging_rxon.flags &=
6245                                         ~RXON_FLG_SHORT_SLOT_MSK;
6246
6247                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6248                                 priv->staging_rxon.flags &=
6249                                         ~RXON_FLG_SHORT_SLOT_MSK;
6250                 }
6251                 /* restore RXON assoc */
6252                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6253                 iwl4965_commit_rxon(priv);
6254                 iwl4965_activate_qos(priv, 1);
6255                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6256         }
6257         iwl4965_send_beacon_cmd(priv);
6258
6259         /* FIXME - we need to add code here to detect a totally new
6260          * configuration, reset the AP, unassoc, rxon timing, assoc,
6261          * clear sta table, add BCAST sta... */
6262 }
6263
6264 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6265                                         struct ieee80211_vif *vif,
6266                                     struct ieee80211_if_conf *conf)
6267 {
6268         struct iwl_priv *priv = hw->priv;
6269         DECLARE_MAC_BUF(mac);
6270         unsigned long flags;
6271         int rc;
6272
6273         if (conf == NULL)
6274                 return -EIO;
6275
6276         if (priv->vif != vif) {
6277                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6278                 return 0;
6279         }
6280
6281         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6282             (!conf->beacon || !conf->ssid_len)) {
6283                 IWL_DEBUG_MAC80211
6284                     ("Leaving in AP mode because HostAPD is not ready.\n");
6285                 return 0;
6286         }
6287
6288         if (!iwl_is_alive(priv))
6289                 return -EAGAIN;
6290
6291         mutex_lock(&priv->mutex);
6292
6293         if (conf->bssid)
6294                 IWL_DEBUG_MAC80211("bssid: %s\n",
6295                                    print_mac(mac, conf->bssid));
6296
6297 /*
6298  * very dubious code was here; the probe filtering flag is never set:
6299  *
6300         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6301             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6302  */
6303
6304         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6305                 if (!conf->bssid) {
6306                         conf->bssid = priv->mac_addr;
6307                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6308                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6309                                            print_mac(mac, conf->bssid));
6310                 }
6311                 if (priv->ibss_beacon)
6312                         dev_kfree_skb(priv->ibss_beacon);
6313
6314                 priv->ibss_beacon = conf->beacon;
6315         }
6316
6317         if (iwl_is_rfkill(priv))
6318                 goto done;
6319
6320         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6321             !is_multicast_ether_addr(conf->bssid)) {
6322                 /* If there is currently a HW scan going on in the background
6323                  * then we need to cancel it else the RXON below will fail. */
6324                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6325                         IWL_WARNING("Aborted scan still in progress "
6326                                     "after 100ms\n");
6327                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6328                         mutex_unlock(&priv->mutex);
6329                         return -EAGAIN;
6330                 }
6331                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6332
6333                 /* TODO: Audit driver for usage of these members and see
6334                  * if mac80211 deprecates them (priv->bssid looks like it
6335                  * shouldn't be there, but I haven't scanned the IBSS code
6336                  * to verify) - jpk */
6337                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6338
6339                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6340                         iwl4965_config_ap(priv);
6341                 else {
6342                         rc = iwl4965_commit_rxon(priv);
6343                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6344                                 iwl4965_rxon_add_station(
6345                                         priv, priv->active_rxon.bssid_addr, 1);
6346                 }
6347
6348         } else {
6349                 iwl4965_scan_cancel_timeout(priv, 100);
6350                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6351                 iwl4965_commit_rxon(priv);
6352         }
6353
6354  done:
6355         spin_lock_irqsave(&priv->lock, flags);
6356         if (!conf->ssid_len)
6357                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6358         else
6359                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6360
6361         priv->essid_len = conf->ssid_len;
6362         spin_unlock_irqrestore(&priv->lock, flags);
6363
6364         IWL_DEBUG_MAC80211("leave\n");
6365         mutex_unlock(&priv->mutex);
6366
6367         return 0;
6368 }
6369
6370 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6371                                  unsigned int changed_flags,
6372                                  unsigned int *total_flags,
6373                                  int mc_count, struct dev_addr_list *mc_list)
6374 {
6375         /*
6376          * XXX: dummy
6377          * see also iwl4965_connection_init_rx_config
6378          */
6379         *total_flags = 0;
6380 }
6381
6382 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6383                                      struct ieee80211_if_init_conf *conf)
6384 {
6385         struct iwl_priv *priv = hw->priv;
6386
6387         IWL_DEBUG_MAC80211("enter\n");
6388
6389         mutex_lock(&priv->mutex);
6390
6391         if (iwl_is_ready_rf(priv)) {
6392                 iwl4965_scan_cancel_timeout(priv, 100);
6393                 cancel_delayed_work(&priv->post_associate);
6394                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6395                 iwl4965_commit_rxon(priv);
6396         }
6397         if (priv->vif == conf->vif) {
6398                 priv->vif = NULL;
6399                 memset(priv->bssid, 0, ETH_ALEN);
6400                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6401                 priv->essid_len = 0;
6402         }
6403         mutex_unlock(&priv->mutex);
6404
6405         IWL_DEBUG_MAC80211("leave\n");
6406
6407 }
6408
6409 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6410 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6411                                      struct ieee80211_vif *vif,
6412                                      struct ieee80211_bss_conf *bss_conf,
6413                                      u32 changes)
6414 {
6415         struct iwl_priv *priv = hw->priv;
6416
6417         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6418
6419         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6420                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6421                                    bss_conf->use_short_preamble);
6422                 if (bss_conf->use_short_preamble)
6423                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6424                 else
6425                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6426         }
6427
6428         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6429                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6430                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6431                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6432                 else
6433                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6434         }
6435
6436         if (changes & BSS_CHANGED_HT) {
6437                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6438                 iwl4965_ht_conf(priv, bss_conf);
6439                 iwl4965_set_rxon_chain(priv);
6440         }
6441
6442         if (changes & BSS_CHANGED_ASSOC) {
6443                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6444                 /* This should never happen as this function should
6445                  * never be called from interrupt context. */
6446                 if (WARN_ON_ONCE(in_interrupt()))
6447                         return;
6448                 if (bss_conf->assoc) {
6449                         priv->assoc_id = bss_conf->aid;
6450                         priv->beacon_int = bss_conf->beacon_int;
6451                         priv->timestamp = bss_conf->timestamp;
6452                         priv->assoc_capability = bss_conf->assoc_capability;
6453                         priv->next_scan_jiffies = jiffies +
6454                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6455                         mutex_lock(&priv->mutex);
6456                         iwl4965_post_associate(priv);
6457                         mutex_unlock(&priv->mutex);
6458                 } else {
6459                         priv->assoc_id = 0;
6460                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6461                 }
6462         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6463                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6464                         iwl_send_rxon_assoc(priv);
6465         }
6466
6467 }
6468
6469 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6470 {
6471         int rc = 0;
6472         unsigned long flags;
6473         struct iwl_priv *priv = hw->priv;
6474
6475         IWL_DEBUG_MAC80211("enter\n");
6476
6477         mutex_lock(&priv->mutex);
6478         spin_lock_irqsave(&priv->lock, flags);
6479
6480         if (!iwl_is_ready_rf(priv)) {
6481                 rc = -EIO;
6482                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6483                 goto out_unlock;
6484         }
6485
6486         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6487                 rc = -EIO;
6488                 IWL_ERROR("ERROR: APs don't scan\n");
6489                 goto out_unlock;
6490         }
6491
6492         /* we don't schedule scan within next_scan_jiffies period */
6493         if (priv->next_scan_jiffies &&
6494                         time_after(priv->next_scan_jiffies, jiffies)) {
6495                 rc = -EAGAIN;
6496                 goto out_unlock;
6497         }
6498         /* if we just finished scan ask for delay */
6499         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6500                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
6501                 rc = -EAGAIN;
6502                 goto out_unlock;
6503         }
6504         if (len) {
6505                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6506                                iwl4965_escape_essid(ssid, len), (int)len);
6507
6508                 priv->one_direct_scan = 1;
6509                 priv->direct_ssid_len = (u8)
6510                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6511                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6512         } else
6513                 priv->one_direct_scan = 0;
6514
6515         rc = iwl4965_scan_initiate(priv);
6516
6517         IWL_DEBUG_MAC80211("leave\n");
6518
6519 out_unlock:
6520         spin_unlock_irqrestore(&priv->lock, flags);
6521         mutex_unlock(&priv->mutex);
6522
6523         return rc;
6524 }
6525
6526 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6527                         struct ieee80211_key_conf *keyconf, const u8 *addr,
6528                         u32 iv32, u16 *phase1key)
6529 {
6530         struct iwl_priv *priv = hw->priv;
6531         u8 sta_id = IWL_INVALID_STATION;
6532         unsigned long flags;
6533         __le16 key_flags = 0;
6534         int i;
6535         DECLARE_MAC_BUF(mac);
6536
6537         IWL_DEBUG_MAC80211("enter\n");
6538
6539         sta_id = iwl_find_station(priv, addr);
6540         if (sta_id == IWL_INVALID_STATION) {
6541                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6542                                    print_mac(mac, addr));
6543                 return;
6544         }
6545
6546         iwl4965_scan_cancel_timeout(priv, 100);
6547
6548         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6549         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6550         key_flags &= ~STA_KEY_FLG_INVALID;
6551
6552         if (sta_id == priv->hw_params.bcast_sta_id)
6553                 key_flags |= STA_KEY_MULTICAST_MSK;
6554
6555         spin_lock_irqsave(&priv->sta_lock, flags);
6556
6557         priv->stations[sta_id].sta.key.key_flags = key_flags;
6558         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6559
6560         for (i = 0; i < 5; i++)
6561                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6562                         cpu_to_le16(phase1key[i]);
6563
6564         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6565         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6566
6567         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6568
6569         spin_unlock_irqrestore(&priv->sta_lock, flags);
6570
6571         IWL_DEBUG_MAC80211("leave\n");
6572 }
6573
6574 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6575                            const u8 *local_addr, const u8 *addr,
6576                            struct ieee80211_key_conf *key)
6577 {
6578         struct iwl_priv *priv = hw->priv;
6579         DECLARE_MAC_BUF(mac);
6580         int ret = 0;
6581         u8 sta_id = IWL_INVALID_STATION;
6582         u8 is_default_wep_key = 0;
6583
6584         IWL_DEBUG_MAC80211("enter\n");
6585
6586         if (priv->hw_params.sw_crypto) {
6587                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6588                 return -EOPNOTSUPP;
6589         }
6590
6591         if (is_zero_ether_addr(addr))
6592                 /* only support pairwise keys */
6593                 return -EOPNOTSUPP;
6594
6595         sta_id = iwl_find_station(priv, addr);
6596         if (sta_id == IWL_INVALID_STATION) {
6597                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6598                                    print_mac(mac, addr));
6599                 return -EINVAL;
6600
6601         }
6602
6603         mutex_lock(&priv->mutex);
6604         iwl4965_scan_cancel_timeout(priv, 100);
6605         mutex_unlock(&priv->mutex);
6606
6607         /* If we are getting WEP group key and we didn't receive any key mapping
6608          * so far, we are in legacy wep mode (group key only), otherwise we are
6609          * in 1X mode.
6610          * In legacy wep mode, we use another host command to the uCode */
6611         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6612                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6613                 if (cmd == SET_KEY)
6614                         is_default_wep_key = !priv->key_mapping_key;
6615                 else
6616                         is_default_wep_key = priv->default_wep_key;
6617         }
6618
6619         switch (cmd) {
6620         case SET_KEY:
6621                 if (is_default_wep_key)
6622                         ret = iwl_set_default_wep_key(priv, key);
6623                 else
6624                         ret = iwl_set_dynamic_key(priv, key, sta_id);
6625
6626                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6627                 break;
6628         case DISABLE_KEY:
6629                 if (is_default_wep_key)
6630                         ret = iwl_remove_default_wep_key(priv, key);
6631                 else
6632                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
6633
6634                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6635                 break;
6636         default:
6637                 ret = -EINVAL;
6638         }
6639
6640         IWL_DEBUG_MAC80211("leave\n");
6641
6642         return ret;
6643 }
6644
6645 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6646                            const struct ieee80211_tx_queue_params *params)
6647 {
6648         struct iwl_priv *priv = hw->priv;
6649         unsigned long flags;
6650         int q;
6651
6652         IWL_DEBUG_MAC80211("enter\n");
6653
6654         if (!iwl_is_ready_rf(priv)) {
6655                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6656                 return -EIO;
6657         }
6658
6659         if (queue >= AC_NUM) {
6660                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6661                 return 0;
6662         }
6663
6664         if (!priv->qos_data.qos_enable) {
6665                 priv->qos_data.qos_active = 0;
6666                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6667                 return 0;
6668         }
6669         q = AC_NUM - 1 - queue;
6670
6671         spin_lock_irqsave(&priv->lock, flags);
6672
6673         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6674         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6675         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6676         priv->qos_data.def_qos_parm.ac[q].edca_txop =
6677                         cpu_to_le16((params->txop * 32));
6678
6679         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6680         priv->qos_data.qos_active = 1;
6681
6682         spin_unlock_irqrestore(&priv->lock, flags);
6683
6684         mutex_lock(&priv->mutex);
6685         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6686                 iwl4965_activate_qos(priv, 1);
6687         else if (priv->assoc_id && iwl_is_associated(priv))
6688                 iwl4965_activate_qos(priv, 0);
6689
6690         mutex_unlock(&priv->mutex);
6691
6692         IWL_DEBUG_MAC80211("leave\n");
6693         return 0;
6694 }
6695
6696 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6697                                 struct ieee80211_tx_queue_stats *stats)
6698 {
6699         struct iwl_priv *priv = hw->priv;
6700         int i, avail;
6701         struct iwl4965_tx_queue *txq;
6702         struct iwl4965_queue *q;
6703         unsigned long flags;
6704
6705         IWL_DEBUG_MAC80211("enter\n");
6706
6707         if (!iwl_is_ready_rf(priv)) {
6708                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6709                 return -EIO;
6710         }
6711
6712         spin_lock_irqsave(&priv->lock, flags);
6713
6714         for (i = 0; i < AC_NUM; i++) {
6715                 txq = &priv->txq[i];
6716                 q = &txq->q;
6717                 avail = iwl4965_queue_space(q);
6718
6719                 stats->data[i].len = q->n_window - avail;
6720                 stats->data[i].limit = q->n_window - q->high_mark;
6721                 stats->data[i].count = q->n_window;
6722
6723         }
6724         spin_unlock_irqrestore(&priv->lock, flags);
6725
6726         IWL_DEBUG_MAC80211("leave\n");
6727
6728         return 0;
6729 }
6730
6731 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6732                              struct ieee80211_low_level_stats *stats)
6733 {
6734         IWL_DEBUG_MAC80211("enter\n");
6735         IWL_DEBUG_MAC80211("leave\n");
6736
6737         return 0;
6738 }
6739
6740 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6741 {
6742         IWL_DEBUG_MAC80211("enter\n");
6743         IWL_DEBUG_MAC80211("leave\n");
6744
6745         return 0;
6746 }
6747
6748 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6749 {
6750         struct iwl_priv *priv = hw->priv;
6751         unsigned long flags;
6752
6753         mutex_lock(&priv->mutex);
6754         IWL_DEBUG_MAC80211("enter\n");
6755
6756         priv->lq_mngr.lq_ready = 0;
6757 #ifdef CONFIG_IWL4965_HT
6758         spin_lock_irqsave(&priv->lock, flags);
6759         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6760         spin_unlock_irqrestore(&priv->lock, flags);
6761 #endif /* CONFIG_IWL4965_HT */
6762
6763         iwlcore_reset_qos(priv);
6764
6765         cancel_delayed_work(&priv->post_associate);
6766
6767         spin_lock_irqsave(&priv->lock, flags);
6768         priv->assoc_id = 0;
6769         priv->assoc_capability = 0;
6770         priv->assoc_station_added = 0;
6771
6772         /* new association get rid of ibss beacon skb */
6773         if (priv->ibss_beacon)
6774                 dev_kfree_skb(priv->ibss_beacon);
6775
6776         priv->ibss_beacon = NULL;
6777
6778         priv->beacon_int = priv->hw->conf.beacon_int;
6779         priv->timestamp = 0;
6780         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6781                 priv->beacon_int = 0;
6782
6783         spin_unlock_irqrestore(&priv->lock, flags);
6784
6785         if (!iwl_is_ready_rf(priv)) {
6786                 IWL_DEBUG_MAC80211("leave - not ready\n");
6787                 mutex_unlock(&priv->mutex);
6788                 return;
6789         }
6790
6791         /* we are restarting association process
6792          * clear RXON_FILTER_ASSOC_MSK bit
6793          */
6794         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6795                 iwl4965_scan_cancel_timeout(priv, 100);
6796                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6797                 iwl4965_commit_rxon(priv);
6798         }
6799
6800         iwl_power_update_mode(priv, 0);
6801
6802         /* Per mac80211.h: This is only used in IBSS mode... */
6803         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6804
6805                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6806                 mutex_unlock(&priv->mutex);
6807                 return;
6808         }
6809
6810         iwl4965_set_rate(priv);
6811
6812         mutex_unlock(&priv->mutex);
6813
6814         IWL_DEBUG_MAC80211("leave\n");
6815 }
6816
6817 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
6818                                  struct ieee80211_tx_control *control)
6819 {
6820         struct iwl_priv *priv = hw->priv;
6821         unsigned long flags;
6822
6823         mutex_lock(&priv->mutex);
6824         IWL_DEBUG_MAC80211("enter\n");
6825
6826         if (!iwl_is_ready_rf(priv)) {
6827                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6828                 mutex_unlock(&priv->mutex);
6829                 return -EIO;
6830         }
6831
6832         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6833                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6834                 mutex_unlock(&priv->mutex);
6835                 return -EIO;
6836         }
6837
6838         spin_lock_irqsave(&priv->lock, flags);
6839
6840         if (priv->ibss_beacon)
6841                 dev_kfree_skb(priv->ibss_beacon);
6842
6843         priv->ibss_beacon = skb;
6844
6845         priv->assoc_id = 0;
6846
6847         IWL_DEBUG_MAC80211("leave\n");
6848         spin_unlock_irqrestore(&priv->lock, flags);
6849
6850         iwlcore_reset_qos(priv);
6851
6852         queue_work(priv->workqueue, &priv->post_associate.work);
6853
6854         mutex_unlock(&priv->mutex);
6855
6856         return 0;
6857 }
6858
6859 /*****************************************************************************
6860  *
6861  * sysfs attributes
6862  *
6863  *****************************************************************************/
6864
6865 #ifdef CONFIG_IWLWIFI_DEBUG
6866
6867 /*
6868  * The following adds a new attribute to the sysfs representation
6869  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6870  * used for controlling the debug level.
6871  *
6872  * See the level definitions in iwl for details.
6873  */
6874
6875 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6876 {
6877         return sprintf(buf, "0x%08X\n", iwl_debug_level);
6878 }
6879 static ssize_t store_debug_level(struct device_driver *d,
6880                                  const char *buf, size_t count)
6881 {
6882         char *p = (char *)buf;
6883         u32 val;
6884
6885         val = simple_strtoul(p, &p, 0);
6886         if (p == buf)
6887                 printk(KERN_INFO DRV_NAME
6888                        ": %s is not in hex or decimal form.\n", buf);
6889         else
6890                 iwl_debug_level = val;
6891
6892         return strnlen(buf, count);
6893 }
6894
6895 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6896                    show_debug_level, store_debug_level);
6897
6898 #endif /* CONFIG_IWLWIFI_DEBUG */
6899
6900
6901 static ssize_t show_temperature(struct device *d,
6902                                 struct device_attribute *attr, char *buf)
6903 {
6904         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6905
6906         if (!iwl_is_alive(priv))
6907                 return -EAGAIN;
6908
6909         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6910 }
6911
6912 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6913
6914 static ssize_t show_rs_window(struct device *d,
6915                               struct device_attribute *attr,
6916                               char *buf)
6917 {
6918         struct iwl_priv *priv = d->driver_data;
6919         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
6920 }
6921 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
6922
6923 static ssize_t show_tx_power(struct device *d,
6924                              struct device_attribute *attr, char *buf)
6925 {
6926         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6927         return sprintf(buf, "%d\n", priv->user_txpower_limit);
6928 }
6929
6930 static ssize_t store_tx_power(struct device *d,
6931                               struct device_attribute *attr,
6932                               const char *buf, size_t count)
6933 {
6934         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6935         char *p = (char *)buf;
6936         u32 val;
6937
6938         val = simple_strtoul(p, &p, 10);
6939         if (p == buf)
6940                 printk(KERN_INFO DRV_NAME
6941                        ": %s is not in decimal form.\n", buf);
6942         else
6943                 iwl4965_hw_reg_set_txpower(priv, val);
6944
6945         return count;
6946 }
6947
6948 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6949
6950 static ssize_t show_flags(struct device *d,
6951                           struct device_attribute *attr, char *buf)
6952 {
6953         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6954
6955         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
6956 }
6957
6958 static ssize_t store_flags(struct device *d,
6959                            struct device_attribute *attr,
6960                            const char *buf, size_t count)
6961 {
6962         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6963         u32 flags = simple_strtoul(buf, NULL, 0);
6964
6965         mutex_lock(&priv->mutex);
6966         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
6967                 /* Cancel any currently running scans... */
6968                 if (iwl4965_scan_cancel_timeout(priv, 100))
6969                         IWL_WARNING("Could not cancel scan.\n");
6970                 else {
6971                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6972                                        flags);
6973                         priv->staging_rxon.flags = cpu_to_le32(flags);
6974                         iwl4965_commit_rxon(priv);
6975                 }
6976         }
6977         mutex_unlock(&priv->mutex);
6978
6979         return count;
6980 }
6981
6982 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6983
6984 static ssize_t show_filter_flags(struct device *d,
6985                                  struct device_attribute *attr, char *buf)
6986 {
6987         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6988
6989         return sprintf(buf, "0x%04X\n",
6990                 le32_to_cpu(priv->active_rxon.filter_flags));
6991 }
6992
6993 static ssize_t store_filter_flags(struct device *d,
6994                                   struct device_attribute *attr,
6995                                   const char *buf, size_t count)
6996 {
6997         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6998         u32 filter_flags = simple_strtoul(buf, NULL, 0);
6999
7000         mutex_lock(&priv->mutex);
7001         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7002                 /* Cancel any currently running scans... */
7003                 if (iwl4965_scan_cancel_timeout(priv, 100))
7004                         IWL_WARNING("Could not cancel scan.\n");
7005                 else {
7006                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7007                                        "0x%04X\n", filter_flags);
7008                         priv->staging_rxon.filter_flags =
7009                                 cpu_to_le32(filter_flags);
7010                         iwl4965_commit_rxon(priv);
7011                 }
7012         }
7013         mutex_unlock(&priv->mutex);
7014
7015         return count;
7016 }
7017
7018 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7019                    store_filter_flags);
7020
7021 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7022
7023 static ssize_t show_measurement(struct device *d,
7024                                 struct device_attribute *attr, char *buf)
7025 {
7026         struct iwl_priv *priv = dev_get_drvdata(d);
7027         struct iwl4965_spectrum_notification measure_report;
7028         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7029         u8 *data = (u8 *) & measure_report;
7030         unsigned long flags;
7031
7032         spin_lock_irqsave(&priv->lock, flags);
7033         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7034                 spin_unlock_irqrestore(&priv->lock, flags);
7035                 return 0;
7036         }
7037         memcpy(&measure_report, &priv->measure_report, size);
7038         priv->measurement_status = 0;
7039         spin_unlock_irqrestore(&priv->lock, flags);
7040
7041         while (size && (PAGE_SIZE - len)) {
7042                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7043                                    PAGE_SIZE - len, 1);
7044                 len = strlen(buf);
7045                 if (PAGE_SIZE - len)
7046                         buf[len++] = '\n';
7047
7048                 ofs += 16;
7049                 size -= min(size, 16U);
7050         }
7051
7052         return len;
7053 }
7054
7055 static ssize_t store_measurement(struct device *d,
7056                                  struct device_attribute *attr,
7057                                  const char *buf, size_t count)
7058 {
7059         struct iwl_priv *priv = dev_get_drvdata(d);
7060         struct ieee80211_measurement_params params = {
7061                 .channel = le16_to_cpu(priv->active_rxon.channel),
7062                 .start_time = cpu_to_le64(priv->last_tsf),
7063                 .duration = cpu_to_le16(1),
7064         };
7065         u8 type = IWL_MEASURE_BASIC;
7066         u8 buffer[32];
7067         u8 channel;
7068
7069         if (count) {
7070                 char *p = buffer;
7071                 strncpy(buffer, buf, min(sizeof(buffer), count));
7072                 channel = simple_strtoul(p, NULL, 0);
7073                 if (channel)
7074                         params.channel = channel;
7075
7076                 p = buffer;
7077                 while (*p && *p != ' ')
7078                         p++;
7079                 if (*p)
7080                         type = simple_strtoul(p + 1, NULL, 0);
7081         }
7082
7083         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7084                        "channel %d (for '%s')\n", type, params.channel, buf);
7085         iwl4965_get_measurement(priv, &params, type);
7086
7087         return count;
7088 }
7089
7090 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7091                    show_measurement, store_measurement);
7092 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7093
7094 static ssize_t store_retry_rate(struct device *d,
7095                                 struct device_attribute *attr,
7096                                 const char *buf, size_t count)
7097 {
7098         struct iwl_priv *priv = dev_get_drvdata(d);
7099
7100         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7101         if (priv->retry_rate <= 0)
7102                 priv->retry_rate = 1;
7103
7104         return count;
7105 }
7106
7107 static ssize_t show_retry_rate(struct device *d,
7108                                struct device_attribute *attr, char *buf)
7109 {
7110         struct iwl_priv *priv = dev_get_drvdata(d);
7111         return sprintf(buf, "%d", priv->retry_rate);
7112 }
7113
7114 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7115                    store_retry_rate);
7116
7117 static ssize_t store_power_level(struct device *d,
7118                                  struct device_attribute *attr,
7119                                  const char *buf, size_t count)
7120 {
7121         struct iwl_priv *priv = dev_get_drvdata(d);
7122         int rc;
7123         int mode;
7124
7125         mode = simple_strtoul(buf, NULL, 0);
7126         mutex_lock(&priv->mutex);
7127
7128         if (!iwl_is_ready(priv)) {
7129                 rc = -EAGAIN;
7130                 goto out;
7131         }
7132
7133         rc = iwl_power_set_user_mode(priv, mode);
7134         if (rc) {
7135                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7136                 goto out;
7137         }
7138         rc = count;
7139
7140  out:
7141         mutex_unlock(&priv->mutex);
7142         return rc;
7143 }
7144
7145 #define MAX_WX_STRING 80
7146
7147 /* Values are in microsecond */
7148 static const s32 timeout_duration[] = {
7149         350000,
7150         250000,
7151         75000,
7152         37000,
7153         25000,
7154 };
7155 static const s32 period_duration[] = {
7156         400000,
7157         700000,
7158         1000000,
7159         1000000,
7160         1000000
7161 };
7162
7163 static ssize_t show_power_level(struct device *d,
7164                                 struct device_attribute *attr, char *buf)
7165 {
7166         struct iwl_priv *priv = dev_get_drvdata(d);
7167         int level = priv->power_data.power_mode;
7168         char *p = buf;
7169
7170         p += sprintf(p, "%d ", level);
7171         switch (level) {
7172         case IWL_POWER_MODE_CAM:
7173         case IWL_POWER_AC:
7174                 p += sprintf(p, "(AC)");
7175                 break;
7176         case IWL_POWER_BATTERY:
7177                 p += sprintf(p, "(BATTERY)");
7178                 break;
7179         default:
7180                 p += sprintf(p,
7181                              "(Timeout %dms, Period %dms)",
7182                              timeout_duration[level - 1] / 1000,
7183                              period_duration[level - 1] / 1000);
7184         }
7185 /*
7186         if (!(priv->power_mode & IWL_POWER_ENABLED))
7187                 p += sprintf(p, " OFF\n");
7188         else
7189                 p += sprintf(p, " \n");
7190 */
7191         p += sprintf(p, " \n");
7192         return (p - buf + 1);
7193 }
7194
7195 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7196                    store_power_level);
7197
7198 static ssize_t show_channels(struct device *d,
7199                              struct device_attribute *attr, char *buf)
7200 {
7201         /* all this shit doesn't belong into sysfs anyway */
7202         return 0;
7203 }
7204
7205 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7206
7207 static ssize_t show_statistics(struct device *d,
7208                                struct device_attribute *attr, char *buf)
7209 {
7210         struct iwl_priv *priv = dev_get_drvdata(d);
7211         u32 size = sizeof(struct iwl4965_notif_statistics);
7212         u32 len = 0, ofs = 0;
7213         u8 *data = (u8 *) & priv->statistics;
7214         int rc = 0;
7215
7216         if (!iwl_is_alive(priv))
7217                 return -EAGAIN;
7218
7219         mutex_lock(&priv->mutex);
7220         rc = iwl_send_statistics_request(priv, 0);
7221         mutex_unlock(&priv->mutex);
7222
7223         if (rc) {
7224                 len = sprintf(buf,
7225                               "Error sending statistics request: 0x%08X\n", rc);
7226                 return len;
7227         }
7228
7229         while (size && (PAGE_SIZE - len)) {
7230                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7231                                    PAGE_SIZE - len, 1);
7232                 len = strlen(buf);
7233                 if (PAGE_SIZE - len)
7234                         buf[len++] = '\n';
7235
7236                 ofs += 16;
7237                 size -= min(size, 16U);
7238         }
7239
7240         return len;
7241 }
7242
7243 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7244
7245 static ssize_t show_status(struct device *d,
7246                            struct device_attribute *attr, char *buf)
7247 {
7248         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7249         if (!iwl_is_alive(priv))
7250                 return -EAGAIN;
7251         return sprintf(buf, "0x%08x\n", (int)priv->status);
7252 }
7253
7254 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7255
7256 static ssize_t dump_error_log(struct device *d,
7257                               struct device_attribute *attr,
7258                               const char *buf, size_t count)
7259 {
7260         char *p = (char *)buf;
7261
7262         if (p[0] == '1')
7263                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7264
7265         return strnlen(buf, count);
7266 }
7267
7268 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7269
7270 static ssize_t dump_event_log(struct device *d,
7271                               struct device_attribute *attr,
7272                               const char *buf, size_t count)
7273 {
7274         char *p = (char *)buf;
7275
7276         if (p[0] == '1')
7277                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7278
7279         return strnlen(buf, count);
7280 }
7281
7282 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7283
7284 /*****************************************************************************
7285  *
7286  * driver setup and teardown
7287  *
7288  *****************************************************************************/
7289
7290 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7291 {
7292         priv->workqueue = create_workqueue(DRV_NAME);
7293
7294         init_waitqueue_head(&priv->wait_command_queue);
7295
7296         INIT_WORK(&priv->up, iwl4965_bg_up);
7297         INIT_WORK(&priv->restart, iwl4965_bg_restart);
7298         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7299         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7300         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7301         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7302         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7303         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7304         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7305         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7306         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7307         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7308
7309         iwl4965_hw_setup_deferred_work(priv);
7310
7311         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7312                      iwl4965_irq_tasklet, (unsigned long)priv);
7313 }
7314
7315 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7316 {
7317         iwl4965_hw_cancel_deferred_work(priv);
7318
7319         cancel_delayed_work_sync(&priv->init_alive_start);
7320         cancel_delayed_work(&priv->scan_check);
7321         cancel_delayed_work(&priv->alive_start);
7322         cancel_delayed_work(&priv->post_associate);
7323         cancel_work_sync(&priv->beacon_update);
7324 }
7325
7326 static struct attribute *iwl4965_sysfs_entries[] = {
7327         &dev_attr_channels.attr,
7328         &dev_attr_dump_errors.attr,
7329         &dev_attr_dump_events.attr,
7330         &dev_attr_flags.attr,
7331         &dev_attr_filter_flags.attr,
7332 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7333         &dev_attr_measurement.attr,
7334 #endif
7335         &dev_attr_power_level.attr,
7336         &dev_attr_retry_rate.attr,
7337         &dev_attr_rs_window.attr,
7338         &dev_attr_statistics.attr,
7339         &dev_attr_status.attr,
7340         &dev_attr_temperature.attr,
7341         &dev_attr_tx_power.attr,
7342
7343         NULL
7344 };
7345
7346 static struct attribute_group iwl4965_attribute_group = {
7347         .name = NULL,           /* put in device directory */
7348         .attrs = iwl4965_sysfs_entries,
7349 };
7350
7351 static struct ieee80211_ops iwl4965_hw_ops = {
7352         .tx = iwl4965_mac_tx,
7353         .start = iwl4965_mac_start,
7354         .stop = iwl4965_mac_stop,
7355         .add_interface = iwl4965_mac_add_interface,
7356         .remove_interface = iwl4965_mac_remove_interface,
7357         .config = iwl4965_mac_config,
7358         .config_interface = iwl4965_mac_config_interface,
7359         .configure_filter = iwl4965_configure_filter,
7360         .set_key = iwl4965_mac_set_key,
7361         .update_tkip_key = iwl4965_mac_update_tkip_key,
7362         .get_stats = iwl4965_mac_get_stats,
7363         .get_tx_stats = iwl4965_mac_get_tx_stats,
7364         .conf_tx = iwl4965_mac_conf_tx,
7365         .get_tsf = iwl4965_mac_get_tsf,
7366         .reset_tsf = iwl4965_mac_reset_tsf,
7367         .beacon_update = iwl4965_mac_beacon_update,
7368         .bss_info_changed = iwl4965_bss_info_changed,
7369 #ifdef CONFIG_IWL4965_HT
7370         .ampdu_action = iwl4965_mac_ampdu_action,
7371 #endif  /* CONFIG_IWL4965_HT */
7372         .hw_scan = iwl4965_mac_hw_scan
7373 };
7374
7375 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7376 {
7377         int err = 0;
7378         struct iwl_priv *priv;
7379         struct ieee80211_hw *hw;
7380         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7381         unsigned long flags;
7382         DECLARE_MAC_BUF(mac);
7383
7384         /************************
7385          * 1. Allocating HW data
7386          ************************/
7387
7388         /* Disabling hardware scan means that mac80211 will perform scans
7389          * "the hard way", rather than using device's scan. */
7390         if (cfg->mod_params->disable_hw_scan) {
7391                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7392                 iwl4965_hw_ops.hw_scan = NULL;
7393         }
7394
7395         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7396         if (!hw) {
7397                 err = -ENOMEM;
7398                 goto out;
7399         }
7400         priv = hw->priv;
7401         /* At this point both hw and priv are allocated. */
7402
7403         SET_IEEE80211_DEV(hw, &pdev->dev);
7404
7405         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7406         priv->cfg = cfg;
7407         priv->pci_dev = pdev;
7408
7409 #ifdef CONFIG_IWLWIFI_DEBUG
7410         iwl_debug_level = priv->cfg->mod_params->debug;
7411         atomic_set(&priv->restrict_refcnt, 0);
7412 #endif
7413
7414         /**************************
7415          * 2. Initializing PCI bus
7416          **************************/
7417         if (pci_enable_device(pdev)) {
7418                 err = -ENODEV;
7419                 goto out_ieee80211_free_hw;
7420         }
7421
7422         pci_set_master(pdev);
7423
7424         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
7425         if (!err)
7426                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
7427         if (err) {
7428                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7429                 if (!err)
7430                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7431                 /* both attempts failed: */
7432                 if (err) {
7433                         printk(KERN_WARNING "%s: No suitable DMA available.\n",
7434                                 DRV_NAME);
7435                         goto out_pci_disable_device;
7436                 }
7437         }
7438
7439         err = pci_request_regions(pdev, DRV_NAME);
7440         if (err)
7441                 goto out_pci_disable_device;
7442
7443         pci_set_drvdata(pdev, priv);
7444
7445         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7446          * PCI Tx retries from interfering with C3 CPU state */
7447         pci_write_config_byte(pdev, 0x41, 0x00);
7448
7449         /***********************
7450          * 3. Read REV register
7451          ***********************/
7452         priv->hw_base = pci_iomap(pdev, 0, 0);
7453         if (!priv->hw_base) {
7454                 err = -ENODEV;
7455                 goto out_pci_release_regions;
7456         }
7457
7458         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7459                 (unsigned long long) pci_resource_len(pdev, 0));
7460         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7461
7462         printk(KERN_INFO DRV_NAME
7463                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7464
7465         /*****************
7466          * 4. Read EEPROM
7467          *****************/
7468         /* nic init */
7469         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7470                 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7471
7472         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7473         err = iwl_poll_bit(priv, CSR_GP_CNTRL,
7474                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7475                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7476         if (err < 0) {
7477                 IWL_DEBUG_INFO("Failed to init the card\n");
7478                 goto out_iounmap;
7479         }
7480         /* Read the EEPROM */
7481         err = iwl_eeprom_init(priv);
7482         if (err) {
7483                 IWL_ERROR("Unable to init EEPROM\n");
7484                 goto out_iounmap;
7485         }
7486         /* MAC Address location in EEPROM same for 3945/4965 */
7487         iwl_eeprom_get_mac(priv, priv->mac_addr);
7488         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7489         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7490
7491         /************************
7492          * 5. Setup HW constants
7493          ************************/
7494         /* Device-specific setup */
7495         if (priv->cfg->ops->lib->set_hw_params(priv)) {
7496                 IWL_ERROR("failed to set hw parameters\n");
7497                 goto out_free_eeprom;
7498         }
7499
7500         /*******************
7501          * 6. Setup hw/priv
7502          *******************/
7503
7504         err = iwl_setup(priv);
7505         if (err)
7506                 goto out_unset_hw_params;
7507         /* At this point both hw and priv are initialized. */
7508
7509         /**********************************
7510          * 7. Initialize module parameters
7511          **********************************/
7512
7513         /* Disable radio (SW RF KILL) via parameter when loading driver */
7514         if (priv->cfg->mod_params->disable) {
7515                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7516                 IWL_DEBUG_INFO("Radio disabled.\n");
7517         }
7518
7519         if (priv->cfg->mod_params->enable_qos)
7520                 priv->qos_data.qos_enable = 1;
7521
7522         /********************
7523          * 8. Setup services
7524          ********************/
7525         spin_lock_irqsave(&priv->lock, flags);
7526         iwl4965_disable_interrupts(priv);
7527         spin_unlock_irqrestore(&priv->lock, flags);
7528
7529         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7530         if (err) {
7531                 IWL_ERROR("failed to create sysfs device attributes\n");
7532                 goto out_unset_hw_params;
7533         }
7534
7535         err = iwl_dbgfs_register(priv, DRV_NAME);
7536         if (err) {
7537                 IWL_ERROR("failed to create debugfs files\n");
7538                 goto out_remove_sysfs;
7539         }
7540
7541         iwl4965_setup_deferred_work(priv);
7542         iwl4965_setup_rx_handlers(priv);
7543
7544         /********************
7545          * 9. Conclude
7546          ********************/
7547         pci_save_state(pdev);
7548         pci_disable_device(pdev);
7549
7550         /* notify iwlcore to init */
7551         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7552         return 0;
7553
7554  out_remove_sysfs:
7555         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7556  out_unset_hw_params:
7557         iwl4965_unset_hw_params(priv);
7558  out_free_eeprom:
7559         iwl_eeprom_free(priv);
7560  out_iounmap:
7561         pci_iounmap(pdev, priv->hw_base);
7562  out_pci_release_regions:
7563         pci_release_regions(pdev);
7564         pci_set_drvdata(pdev, NULL);
7565  out_pci_disable_device:
7566         pci_disable_device(pdev);
7567  out_ieee80211_free_hw:
7568         ieee80211_free_hw(priv->hw);
7569  out:
7570         return err;
7571 }
7572
7573 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7574 {
7575         struct iwl_priv *priv = pci_get_drvdata(pdev);
7576         struct list_head *p, *q;
7577         int i;
7578         unsigned long flags;
7579
7580         if (!priv)
7581                 return;
7582
7583         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7584
7585         if (priv->mac80211_registered) {
7586                 ieee80211_unregister_hw(priv->hw);
7587                 priv->mac80211_registered = 0;
7588         }
7589
7590         set_bit(STATUS_EXIT_PENDING, &priv->status);
7591
7592         iwl4965_down(priv);
7593
7594         /* make sure we flush any pending irq or
7595          * tasklet for the driver
7596          */
7597         spin_lock_irqsave(&priv->lock, flags);
7598         iwl4965_disable_interrupts(priv);
7599         spin_unlock_irqrestore(&priv->lock, flags);
7600
7601         iwl_synchronize_irq(priv);
7602
7603         /* Free MAC hash list for ADHOC */
7604         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7605                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7606                         list_del(p);
7607                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7608                 }
7609         }
7610
7611         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7612         iwl_dbgfs_unregister(priv);
7613         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7614
7615         iwl4965_dealloc_ucode_pci(priv);
7616
7617         if (priv->rxq.bd)
7618                 iwl4965_rx_queue_free(priv, &priv->rxq);
7619         iwl4965_hw_txq_ctx_free(priv);
7620
7621         iwl4965_unset_hw_params(priv);
7622         iwlcore_clear_stations_table(priv);
7623         iwl_eeprom_free(priv);
7624
7625
7626         /*netif_stop_queue(dev); */
7627         flush_workqueue(priv->workqueue);
7628
7629         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7630          * priv->workqueue... so we can't take down the workqueue
7631          * until now... */
7632         destroy_workqueue(priv->workqueue);
7633         priv->workqueue = NULL;
7634
7635         pci_iounmap(pdev, priv->hw_base);
7636         pci_release_regions(pdev);
7637         pci_disable_device(pdev);
7638         pci_set_drvdata(pdev, NULL);
7639
7640         iwl_free_channel_map(priv);
7641         iwl4965_free_geos(priv);
7642
7643         if (priv->ibss_beacon)
7644                 dev_kfree_skb(priv->ibss_beacon);
7645
7646         ieee80211_free_hw(priv->hw);
7647 }
7648
7649 #ifdef CONFIG_PM
7650
7651 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7652 {
7653         struct iwl_priv *priv = pci_get_drvdata(pdev);
7654
7655         if (priv->is_open) {
7656                 set_bit(STATUS_IN_SUSPEND, &priv->status);
7657                 iwl4965_mac_stop(priv->hw);
7658                 priv->is_open = 1;
7659         }
7660
7661         pci_set_power_state(pdev, PCI_D3hot);
7662
7663         return 0;
7664 }
7665
7666 static int iwl4965_pci_resume(struct pci_dev *pdev)
7667 {
7668         struct iwl_priv *priv = pci_get_drvdata(pdev);
7669
7670         pci_set_power_state(pdev, PCI_D0);
7671
7672         if (priv->is_open)
7673                 iwl4965_mac_start(priv->hw);
7674
7675         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7676         return 0;
7677 }
7678
7679 #endif /* CONFIG_PM */
7680
7681 /*****************************************************************************
7682  *
7683  * driver and module entry point
7684  *
7685  *****************************************************************************/
7686
7687 /* Hardware specific file defines the PCI IDs table for that hardware module */
7688 static struct pci_device_id iwl_hw_card_ids[] = {
7689         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7690         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7691         {0}
7692 };
7693 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7694
7695 static struct pci_driver iwl_driver = {
7696         .name = DRV_NAME,
7697         .id_table = iwl_hw_card_ids,
7698         .probe = iwl4965_pci_probe,
7699         .remove = __devexit_p(iwl4965_pci_remove),
7700 #ifdef CONFIG_PM
7701         .suspend = iwl4965_pci_suspend,
7702         .resume = iwl4965_pci_resume,
7703 #endif
7704 };
7705
7706 static int __init iwl4965_init(void)
7707 {
7708
7709         int ret;
7710         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7711         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7712
7713         ret = iwl4965_rate_control_register();
7714         if (ret) {
7715                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7716                 return ret;
7717         }
7718
7719         ret = pci_register_driver(&iwl_driver);
7720         if (ret) {
7721                 IWL_ERROR("Unable to initialize PCI module\n");
7722                 goto error_register;
7723         }
7724 #ifdef CONFIG_IWLWIFI_DEBUG
7725         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7726         if (ret) {
7727                 IWL_ERROR("Unable to create driver sysfs file\n");
7728                 goto error_debug;
7729         }
7730 #endif
7731
7732         return ret;
7733
7734 #ifdef CONFIG_IWLWIFI_DEBUG
7735 error_debug:
7736         pci_unregister_driver(&iwl_driver);
7737 #endif
7738 error_register:
7739         iwl4965_rate_control_unregister();
7740         return ret;
7741 }
7742
7743 static void __exit iwl4965_exit(void)
7744 {
7745 #ifdef CONFIG_IWLWIFI_DEBUG
7746         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7747 #endif
7748         pci_unregister_driver(&iwl_driver);
7749         iwl4965_rate_control_unregister();
7750 }
7751
7752 module_exit(iwl4965_exit);
7753 module_init(iwl4965_init);