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-dev.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 iwl_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         iwl_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 ret = 0;
 906         struct iwl_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         ret = iwl_send_cmd_sync(priv, &cmd);
 921         if (ret) {
 922                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 923                 return ret;
 924         }
 925
 926         res = (struct iwl_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 ret;
 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 iwl_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 iwl_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(struct iwl_priv *priv)
1077 {
1078         int i;
1079         int rate_mask;
1080
1081         /* Set rate mask*/
1082         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1083                 rate_mask = priv->active_rate_basic & 0xF;
1084         else
1085                 rate_mask = priv->active_rate_basic & 0xFF0;
1086
1087         /* Find lowest valid rate */
1088         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1089                                         i = iwl4965_rates[i].next_ieee) {
1090                 if (rate_mask & (1 << i))
1091                         return iwl4965_rates[i].plcp;
1092         }
1093
1094         /* No valid rate was found. Assign the lowest one */
1095         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1096                 return IWL_RATE_1M_PLCP;
1097         else
1098                 return IWL_RATE_6M_PLCP;
1099 }
1100
1101 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1102 {
1103         struct iwl4965_frame *frame;
1104         unsigned int frame_size;
1105         int rc;
1106         u8 rate;
1107
1108         frame = iwl4965_get_free_frame(priv);
1109
1110         if (!frame) {
1111                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1112                           "command.\n");
1113                 return -ENOMEM;
1114         }
1115
1116         rate = iwl4965_rate_get_lowest_plcp(priv);
1117
1118         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1119
1120         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1121                               &frame->u.cmd[0]);
1122
1123         iwl4965_free_frame(priv, frame);
1124
1125         return rc;
1126 }
1127
1128 /******************************************************************************
1129  *
1130  * Misc. internal state and helper functions
1131  *
1132  ******************************************************************************/
1133
1134 /**
1135  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1136  *
1137  * return : set the bit for each supported rate insert in ie
1138  */
1139 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1140                                     u16 basic_rate, int *left)
1141 {
1142         u16 ret_rates = 0, bit;
1143         int i;
1144         u8 *cnt = ie;
1145         u8 *rates = ie + 1;
1146
1147         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1148                 if (bit & supported_rate) {
1149                         ret_rates |= bit;
1150                         rates[*cnt] = iwl4965_rates[i].ieee |
1151                                 ((bit & basic_rate) ? 0x80 : 0x00);
1152                         (*cnt)++;
1153                         (*left)--;
1154                         if ((*left <= 0) ||
1155                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1156                                 break;
1157                 }
1158         }
1159
1160         return ret_rates;
1161 }
1162
1163 #ifdef CONFIG_IWL4965_HT
1164 static void iwl4965_ht_conf(struct iwl_priv *priv,
1165                             struct ieee80211_bss_conf *bss_conf)
1166 {
1167         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
1168         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
1169         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
1170
1171         IWL_DEBUG_MAC80211("enter: \n");
1172
1173         iwl_conf->is_ht = bss_conf->assoc_ht;
1174
1175         if (!iwl_conf->is_ht)
1176                 return;
1177
1178         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1179
1180         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
1181                 iwl_conf->sgf |= 0x1;
1182         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
1183                 iwl_conf->sgf |= 0x2;
1184
1185         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
1186         iwl_conf->max_amsdu_size =
1187                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
1188
1189         iwl_conf->supported_chan_width =
1190                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
1191         iwl_conf->extension_chan_offset =
1192                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
1193         /* If no above or below channel supplied disable FAT channel */
1194         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
1195             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
1196                 iwl_conf->supported_chan_width = 0;
1197
1198         iwl_conf->tx_mimo_ps_mode =
1199                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1200         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
1201
1202         iwl_conf->control_channel = ht_bss_conf->primary_channel;
1203         iwl_conf->tx_chan_width =
1204                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
1205         iwl_conf->ht_protection =
1206                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
1207         iwl_conf->non_GF_STA_present =
1208                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
1209
1210         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
1211         IWL_DEBUG_MAC80211("leave\n");
1212 }
1213
1214 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1215                         u8 *pos, int *left)
1216 {
1217         struct ieee80211_ht_cap *ht_cap;
1218
1219         if (!sband || !sband->ht_info.ht_supported)
1220                 return;
1221
1222         if (*left < sizeof(struct ieee80211_ht_cap))
1223                 return;
1224
1225         *pos++ = sizeof(struct ieee80211_ht_cap);
1226         ht_cap = (struct ieee80211_ht_cap *) pos;
1227
1228         ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1229         memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1230         ht_cap->ampdu_params_info =
1231                 (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
1232                 ((sband->ht_info.ampdu_density << 2) &
1233                         IEEE80211_HT_CAP_AMPDU_DENSITY);
1234         *left -= sizeof(struct ieee80211_ht_cap);
1235 }
1236 #else
1237 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
1238                                    struct ieee80211_bss_conf *bss_conf)
1239 {
1240 }
1241 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1242                         u8 *pos, int *left)
1243 {
1244 }
1245 #endif
1246
1247
1248 /**
1249  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1250  */
1251 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1252                                   enum ieee80211_band band,
1253                                   struct ieee80211_mgmt *frame,
1254                                   int left, int is_direct)
1255 {
1256         int len = 0;
1257         u8 *pos = NULL;
1258         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1259         const struct ieee80211_supported_band *sband =
1260                                                 iwl_get_hw_mode(priv, band);
1261
1262         /* Make sure there is enough space for the probe request,
1263          * two mandatory IEs and the data */
1264         left -= 24;
1265         if (left < 0)
1266                 return 0;
1267         len += 24;
1268
1269         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1270         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1271         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1272         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1273         frame->seq_ctrl = 0;
1274
1275         /* fill in our indirect SSID IE */
1276         /* ...next IE... */
1277
1278         left -= 2;
1279         if (left < 0)
1280                 return 0;
1281         len += 2;
1282         pos = &(frame->u.probe_req.variable[0]);
1283         *pos++ = WLAN_EID_SSID;
1284         *pos++ = 0;
1285
1286         /* fill in our direct SSID IE... */
1287         if (is_direct) {
1288                 /* ...next IE... */
1289                 left -= 2 + priv->essid_len;
1290                 if (left < 0)
1291                         return 0;
1292                 /* ... fill it in... */
1293                 *pos++ = WLAN_EID_SSID;
1294                 *pos++ = priv->essid_len;
1295                 memcpy(pos, priv->essid, priv->essid_len);
1296                 pos += priv->essid_len;
1297                 len += 2 + priv->essid_len;
1298         }
1299
1300         /* fill in supported rate */
1301         /* ...next IE... */
1302         left -= 2;
1303         if (left < 0)
1304                 return 0;
1305
1306         /* ... fill it in... */
1307         *pos++ = WLAN_EID_SUPP_RATES;
1308         *pos = 0;
1309
1310         /* exclude 60M rate */
1311         active_rates = priv->rates_mask;
1312         active_rates &= ~IWL_RATE_60M_MASK;
1313
1314         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1315
1316         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1317         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1318                         active_rate_basic, &left);
1319         active_rates &= ~ret_rates;
1320
1321         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1322                                  active_rate_basic, &left);
1323         active_rates &= ~ret_rates;
1324
1325         len += 2 + *pos;
1326         pos += (*pos) + 1;
1327         if (active_rates == 0)
1328                 goto fill_end;
1329
1330         /* fill in supported extended rate */
1331         /* ...next IE... */
1332         left -= 2;
1333         if (left < 0)
1334                 return 0;
1335         /* ... fill it in... */
1336         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1337         *pos = 0;
1338         iwl4965_supported_rate_to_ie(pos, active_rates,
1339                                  active_rate_basic, &left);
1340         if (*pos > 0)
1341                 len += 2 + *pos;
1342
1343  fill_end:
1344         /* fill in HT IE */
1345         left -= 2;
1346         if (left < 0)
1347                 return 0;
1348
1349         *pos++ = WLAN_EID_HT_CAPABILITY;
1350         *pos = 0;
1351
1352         iwl_ht_cap_to_ie(sband, pos, &left);
1353
1354         if (*pos > 0)
1355                 len += 2 + *pos;
1356         return (u16)len;
1357 }
1358
1359 /*
1360  * QoS  support
1361 */
1362 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1363                                        struct iwl4965_qosparam_cmd *qos)
1364 {
1365
1366         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1367                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1368 }
1369
1370 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1371 {
1372         unsigned long flags;
1373
1374         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1375                 return;
1376
1377         if (!priv->qos_data.qos_enable)
1378                 return;
1379
1380         spin_lock_irqsave(&priv->lock, flags);
1381         priv->qos_data.def_qos_parm.qos_flags = 0;
1382
1383         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1384             !priv->qos_data.qos_cap.q_AP.txop_request)
1385                 priv->qos_data.def_qos_parm.qos_flags |=
1386                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1387         if (priv->qos_data.qos_active)
1388                 priv->qos_data.def_qos_parm.qos_flags |=
1389                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1390
1391 #ifdef CONFIG_IWL4965_HT
1392         if (priv->current_ht_config.is_ht)
1393                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1394 #endif /* CONFIG_IWL4965_HT */
1395
1396         spin_unlock_irqrestore(&priv->lock, flags);
1397
1398         if (force || iwl_is_associated(priv)) {
1399                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1400                                 priv->qos_data.qos_active,
1401                                 priv->qos_data.def_qos_parm.qos_flags);
1402
1403                 iwl4965_send_qos_params_command(priv,
1404                                 &(priv->qos_data.def_qos_parm));
1405         }
1406 }
1407
1408 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1409 {
1410         /* Filter incoming packets to determine if they are targeted toward
1411          * this network, discarding packets coming from ourselves */
1412         switch (priv->iw_mode) {
1413         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1414                 /* packets from our adapter are dropped (echo) */
1415                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1416                         return 0;
1417                 /* {broad,multi}cast packets to our IBSS go through */
1418                 if (is_multicast_ether_addr(header->addr1))
1419                         return !compare_ether_addr(header->addr3, priv->bssid);
1420                 /* packets to our adapter go through */
1421                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1422         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1423                 /* packets from our adapter are dropped (echo) */
1424                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1425                         return 0;
1426                 /* {broad,multi}cast packets to our BSS go through */
1427                 if (is_multicast_ether_addr(header->addr1))
1428                         return !compare_ether_addr(header->addr2, priv->bssid);
1429                 /* packets to our adapter go through */
1430                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1431         default:
1432                 break;
1433         }
1434
1435         return 1;
1436 }
1437
1438 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1439
1440 static const char *iwl4965_get_tx_fail_reason(u32 status)
1441 {
1442         switch (status & TX_STATUS_MSK) {
1443         case TX_STATUS_SUCCESS:
1444                 return "SUCCESS";
1445                 TX_STATUS_ENTRY(SHORT_LIMIT);
1446                 TX_STATUS_ENTRY(LONG_LIMIT);
1447                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1448                 TX_STATUS_ENTRY(MGMNT_ABORT);
1449                 TX_STATUS_ENTRY(NEXT_FRAG);
1450                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1451                 TX_STATUS_ENTRY(DEST_PS);
1452                 TX_STATUS_ENTRY(ABORTED);
1453                 TX_STATUS_ENTRY(BT_RETRY);
1454                 TX_STATUS_ENTRY(STA_INVALID);
1455                 TX_STATUS_ENTRY(FRAG_DROPPED);
1456                 TX_STATUS_ENTRY(TID_DISABLE);
1457                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1458                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1459                 TX_STATUS_ENTRY(TX_LOCKED);
1460                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1461         }
1462
1463         return "UNKNOWN";
1464 }
1465
1466 /**
1467  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1468  *
1469  * NOTE: priv->mutex is not required before calling this function
1470  */
1471 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1472 {
1473         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1474                 clear_bit(STATUS_SCANNING, &priv->status);
1475                 return 0;
1476         }
1477
1478         if (test_bit(STATUS_SCANNING, &priv->status)) {
1479                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1480                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1481                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1482                         queue_work(priv->workqueue, &priv->abort_scan);
1483
1484                 } else
1485                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1486
1487                 return test_bit(STATUS_SCANNING, &priv->status);
1488         }
1489
1490         return 0;
1491 }
1492
1493 /**
1494  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1495  * @ms: amount of time to wait (in milliseconds) for scan to abort
1496  *
1497  * NOTE: priv->mutex must be held before calling this function
1498  */
1499 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1500 {
1501         unsigned long now = jiffies;
1502         int ret;
1503
1504         ret = iwl4965_scan_cancel(priv);
1505         if (ret && ms) {
1506                 mutex_unlock(&priv->mutex);
1507                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1508                                 test_bit(STATUS_SCANNING, &priv->status))
1509                         msleep(1);
1510                 mutex_lock(&priv->mutex);
1511
1512                 return test_bit(STATUS_SCANNING, &priv->status);
1513         }
1514
1515         return ret;
1516 }
1517
1518 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1519 {
1520         /* Reset ieee stats */
1521
1522         /* We don't reset the net_device_stats (ieee->stats) on
1523          * re-association */
1524
1525         priv->last_seq_num = -1;
1526         priv->last_frag_num = -1;
1527         priv->last_packet_time = 0;
1528
1529         iwl4965_scan_cancel(priv);
1530 }
1531
1532 #define MAX_UCODE_BEACON_INTERVAL       4096
1533 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1534
1535 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1536 {
1537         u16 new_val = 0;
1538         u16 beacon_factor = 0;
1539
1540         beacon_factor =
1541             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1542                 / MAX_UCODE_BEACON_INTERVAL;
1543         new_val = beacon_val / beacon_factor;
1544
1545         return cpu_to_le16(new_val);
1546 }
1547
1548 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1549 {
1550         u64 interval_tm_unit;
1551         u64 tsf, result;
1552         unsigned long flags;
1553         struct ieee80211_conf *conf = NULL;
1554         u16 beacon_int = 0;
1555
1556         conf = ieee80211_get_hw_conf(priv->hw);
1557
1558         spin_lock_irqsave(&priv->lock, flags);
1559         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1560         priv->rxon_timing.timestamp.dw[0] =
1561                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1562
1563         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1564
1565         tsf = priv->timestamp;
1566
1567         beacon_int = priv->beacon_int;
1568         spin_unlock_irqrestore(&priv->lock, flags);
1569
1570         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1571                 if (beacon_int == 0) {
1572                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1573                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1574                 } else {
1575                         priv->rxon_timing.beacon_interval =
1576                                 cpu_to_le16(beacon_int);
1577                         priv->rxon_timing.beacon_interval =
1578                             iwl4965_adjust_beacon_interval(
1579                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1580                 }
1581
1582                 priv->rxon_timing.atim_window = 0;
1583         } else {
1584                 priv->rxon_timing.beacon_interval =
1585                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1586                 /* TODO: we need to get atim_window from upper stack
1587                  * for now we set to 0 */
1588                 priv->rxon_timing.atim_window = 0;
1589         }
1590
1591         interval_tm_unit =
1592                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1593         result = do_div(tsf, interval_tm_unit);
1594         priv->rxon_timing.beacon_init_val =
1595             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1596
1597         IWL_DEBUG_ASSOC
1598             ("beacon interval %d beacon timer %d beacon tim %d\n",
1599                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1600                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1601                 le16_to_cpu(priv->rxon_timing.atim_window));
1602 }
1603
1604 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1605 {
1606         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1607                 IWL_ERROR("APs don't scan.\n");
1608                 return 0;
1609         }
1610
1611         if (!iwl_is_ready_rf(priv)) {
1612                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1613                 return -EIO;
1614         }
1615
1616         if (test_bit(STATUS_SCANNING, &priv->status)) {
1617                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1618                 return -EAGAIN;
1619         }
1620
1621         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1622                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1623                                "Queuing.\n");
1624                 return -EAGAIN;
1625         }
1626
1627         IWL_DEBUG_INFO("Starting scan...\n");
1628         priv->scan_bands = 2;
1629         set_bit(STATUS_SCANNING, &priv->status);
1630         priv->scan_start = jiffies;
1631         priv->scan_pass_start = priv->scan_start;
1632
1633         queue_work(priv->workqueue, &priv->request_scan);
1634
1635         return 0;
1636 }
1637
1638
1639 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1640                                           enum ieee80211_band band)
1641 {
1642         if (band == IEEE80211_BAND_5GHZ) {
1643                 priv->staging_rxon.flags &=
1644                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1645                       | RXON_FLG_CCK_MSK);
1646                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1647         } else {
1648                 /* Copied from iwl4965_post_associate() */
1649                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1650                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1651                 else
1652                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1653
1654                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1655                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1656
1657                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1658                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1659                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1660         }
1661 }
1662
1663 /*
1664  * initialize rxon structure with default values from eeprom
1665  */
1666 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1667 {
1668         const struct iwl_channel_info *ch_info;
1669
1670         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1671
1672         switch (priv->iw_mode) {
1673         case IEEE80211_IF_TYPE_AP:
1674                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1675                 break;
1676
1677         case IEEE80211_IF_TYPE_STA:
1678                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1679                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1680                 break;
1681
1682         case IEEE80211_IF_TYPE_IBSS:
1683                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1684                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1685                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1686                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1687                 break;
1688
1689         case IEEE80211_IF_TYPE_MNTR:
1690                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1691                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1692                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1693                 break;
1694         default:
1695                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1696                 break;
1697         }
1698
1699 #if 0
1700         /* TODO:  Figure out when short_preamble would be set and cache from
1701          * that */
1702         if (!hw_to_local(priv->hw)->short_preamble)
1703                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1704         else
1705                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1706 #endif
1707
1708         ch_info = iwl_get_channel_info(priv, priv->band,
1709                                        le16_to_cpu(priv->staging_rxon.channel));
1710
1711         if (!ch_info)
1712                 ch_info = &priv->channel_info[0];
1713
1714         /*
1715          * in some case A channels are all non IBSS
1716          * in this case force B/G channel
1717          */
1718         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1719             !(is_channel_ibss(ch_info)))
1720                 ch_info = &priv->channel_info[0];
1721
1722         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1723         priv->band = ch_info->band;
1724
1725         iwl4965_set_flags_for_phymode(priv, priv->band);
1726
1727         priv->staging_rxon.ofdm_basic_rates =
1728             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1729         priv->staging_rxon.cck_basic_rates =
1730             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1731
1732         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1733                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1734         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1735         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1736         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1737         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1738         iwl_set_rxon_chain(priv);
1739 }
1740
1741 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1742 {
1743         if (mode == IEEE80211_IF_TYPE_IBSS) {
1744                 const struct iwl_channel_info *ch_info;
1745
1746                 ch_info = iwl_get_channel_info(priv,
1747                         priv->band,
1748                         le16_to_cpu(priv->staging_rxon.channel));
1749
1750                 if (!ch_info || !is_channel_ibss(ch_info)) {
1751                         IWL_ERROR("channel %d not IBSS channel\n",
1752                                   le16_to_cpu(priv->staging_rxon.channel));
1753                         return -EINVAL;
1754                 }
1755         }
1756
1757         priv->iw_mode = mode;
1758
1759         iwl4965_connection_init_rx_config(priv);
1760         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1761
1762         iwlcore_clear_stations_table(priv);
1763
1764         /* dont commit rxon if rf-kill is on*/
1765         if (!iwl_is_ready_rf(priv))
1766                 return -EAGAIN;
1767
1768         cancel_delayed_work(&priv->scan_check);
1769         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1770                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1771                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1772                 return -EAGAIN;
1773         }
1774
1775         iwl4965_commit_rxon(priv);
1776
1777         return 0;
1778 }
1779
1780 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1781                                       struct ieee80211_tx_control *ctl,
1782                                       struct iwl_cmd *cmd,
1783                                       struct sk_buff *skb_frag,
1784                                       int sta_id)
1785 {
1786         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1787         struct iwl_wep_key *wepkey;
1788         int keyidx = 0;
1789
1790         BUG_ON(ctl->hw_key->hw_key_idx > 3);
1791
1792         switch (keyinfo->alg) {
1793         case ALG_CCMP:
1794                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1795                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1796                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1797                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1798                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1799                 break;
1800
1801         case ALG_TKIP:
1802                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1803                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1804                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1805                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1806                 break;
1807
1808         case ALG_WEP:
1809                 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1810                 cmd->cmd.tx.sec_ctl = 0;
1811                 if (priv->default_wep_key) {
1812                         /* the WEP key was sent as static */
1813                         keyidx = ctl->hw_key->hw_key_idx;
1814                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1815                                                         wepkey->key_size);
1816                         if (wepkey->key_size == WEP_KEY_LEN_128)
1817                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1818                 } else {
1819                         /* the WEP key was sent as dynamic */
1820                         keyidx = keyinfo->keyidx;
1821                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1822                                                         keyinfo->keylen);
1823                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1824                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1825                 }
1826
1827                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1828                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1829
1830                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1831                              "with key %d\n", keyidx);
1832                 break;
1833
1834         default:
1835                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1836                 break;
1837         }
1838 }
1839
1840 /*
1841  * handle build REPLY_TX command notification.
1842  */
1843 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1844                                   struct iwl_cmd *cmd,
1845                                   struct ieee80211_tx_control *ctrl,
1846                                   struct ieee80211_hdr *hdr,
1847                                   int is_unicast, u8 std_id)
1848 {
1849         __le16 *qc;
1850         u16 fc = le16_to_cpu(hdr->frame_control);
1851         __le32 tx_flags = cmd->cmd.tx.tx_flags;
1852
1853         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1854         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1855                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1856                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1857                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1858                 if (ieee80211_is_probe_response(fc) &&
1859                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1860                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1861         } else {
1862                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1863                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1864         }
1865
1866         if (ieee80211_is_back_request(fc))
1867                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1868
1869
1870         cmd->cmd.tx.sta_id = std_id;
1871         if (ieee80211_get_morefrag(hdr))
1872                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1873
1874         qc = ieee80211_get_qos_ctrl(hdr);
1875         if (qc) {
1876                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
1877                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1878         } else
1879                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1880
1881         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
1882                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1883                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1884         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
1885                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1886                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1887         }
1888
1889         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1890                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1891
1892         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1893         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1894                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
1895                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
1896                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
1897                 else
1898                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
1899         } else {
1900                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
1901         }
1902
1903         cmd->cmd.tx.driver_txop = 0;
1904         cmd->cmd.tx.tx_flags = tx_flags;
1905         cmd->cmd.tx.next_frame_len = 0;
1906 }
1907 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
1908 {
1909         /* 0 - mgmt, 1 - cnt, 2 - data */
1910         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
1911         priv->tx_stats[idx].cnt++;
1912         priv->tx_stats[idx].bytes += len;
1913 }
1914 /**
1915  * iwl4965_get_sta_id - Find station's index within station table
1916  *
1917  * If new IBSS station, create new entry in station table
1918  */
1919 static int iwl4965_get_sta_id(struct iwl_priv *priv,
1920                                 struct ieee80211_hdr *hdr)
1921 {
1922         int sta_id;
1923         u16 fc = le16_to_cpu(hdr->frame_control);
1924         DECLARE_MAC_BUF(mac);
1925
1926         /* If this frame is broadcast or management, use broadcast station id */
1927         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1928             is_multicast_ether_addr(hdr->addr1))
1929                 return priv->hw_params.bcast_sta_id;
1930
1931         switch (priv->iw_mode) {
1932
1933         /* If we are a client station in a BSS network, use the special
1934          * AP station entry (that's the only station we communicate with) */
1935         case IEEE80211_IF_TYPE_STA:
1936                 return IWL_AP_ID;
1937
1938         /* If we are an AP, then find the station, or use BCAST */
1939         case IEEE80211_IF_TYPE_AP:
1940                 sta_id = iwl_find_station(priv, hdr->addr1);
1941                 if (sta_id != IWL_INVALID_STATION)
1942                         return sta_id;
1943                 return priv->hw_params.bcast_sta_id;
1944
1945         /* If this frame is going out to an IBSS network, find the station,
1946          * or create a new station table entry */
1947         case IEEE80211_IF_TYPE_IBSS:
1948                 sta_id = iwl_find_station(priv, hdr->addr1);
1949                 if (sta_id != IWL_INVALID_STATION)
1950                         return sta_id;
1951
1952                 /* Create new station table entry */
1953                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
1954                                                    0, CMD_ASYNC, NULL);
1955
1956                 if (sta_id != IWL_INVALID_STATION)
1957                         return sta_id;
1958
1959                 IWL_DEBUG_DROP("Station %s not in station map. "
1960                                "Defaulting to broadcast...\n",
1961                                print_mac(mac, hdr->addr1));
1962                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1963                 return priv->hw_params.bcast_sta_id;
1964
1965         default:
1966                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
1967                 return priv->hw_params.bcast_sta_id;
1968         }
1969 }
1970
1971 /*
1972  * start REPLY_TX command process
1973  */
1974 static int iwl4965_tx_skb(struct iwl_priv *priv,
1975                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
1976 {
1977         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1978         struct iwl4965_tfd_frame *tfd;
1979         u32 *control_flags;
1980         int txq_id = ctl->queue;
1981         struct iwl4965_tx_queue *txq = NULL;
1982         struct iwl4965_queue *q = NULL;
1983         dma_addr_t phys_addr;
1984         dma_addr_t txcmd_phys;
1985         dma_addr_t scratch_phys;
1986         struct iwl_cmd *out_cmd = NULL;
1987         u16 len, idx, len_org;
1988         u8 id, hdr_len, unicast;
1989         u8 sta_id;
1990         u16 seq_number = 0;
1991         u16 fc;
1992         __le16 *qc;
1993         u8 wait_write_ptr = 0;
1994         unsigned long flags;
1995         int rc;
1996
1997         spin_lock_irqsave(&priv->lock, flags);
1998         if (iwl_is_rfkill(priv)) {
1999                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2000                 goto drop_unlock;
2001         }
2002
2003         if (!priv->vif) {
2004                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2005                 goto drop_unlock;
2006         }
2007
2008         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2009                 IWL_ERROR("ERROR: No TX rate available.\n");
2010                 goto drop_unlock;
2011         }
2012
2013         unicast = !is_multicast_ether_addr(hdr->addr1);
2014         id = 0;
2015
2016         fc = le16_to_cpu(hdr->frame_control);
2017
2018 #ifdef CONFIG_IWLWIFI_DEBUG
2019         if (ieee80211_is_auth(fc))
2020                 IWL_DEBUG_TX("Sending AUTH frame\n");
2021         else if (ieee80211_is_assoc_request(fc))
2022                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2023         else if (ieee80211_is_reassoc_request(fc))
2024                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2025 #endif
2026
2027         /* drop all data frame if we are not associated */
2028         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2029            (!iwl_is_associated(priv) ||
2030             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2031             !priv->assoc_station_added)) {
2032                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2033                 goto drop_unlock;
2034         }
2035
2036         spin_unlock_irqrestore(&priv->lock, flags);
2037
2038         hdr_len = ieee80211_get_hdrlen(fc);
2039
2040         /* Find (or create) index into station table for destination station */
2041         sta_id = iwl4965_get_sta_id(priv, hdr);
2042         if (sta_id == IWL_INVALID_STATION) {
2043                 DECLARE_MAC_BUF(mac);
2044
2045                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2046                                print_mac(mac, hdr->addr1));
2047                 goto drop;
2048         }
2049
2050         IWL_DEBUG_TX("station Id %d\n", sta_id);
2051
2052         qc = ieee80211_get_qos_ctrl(hdr);
2053         if (qc) {
2054                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2055                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2056                                 IEEE80211_SCTL_SEQ;
2057                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2058                         (hdr->seq_ctrl &
2059                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2060                 seq_number += 0x10;
2061 #ifdef CONFIG_IWL4965_HT
2062                 /* aggregation is on for this <sta,tid> */
2063                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2064                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2065                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2066 #endif /* CONFIG_IWL4965_HT */
2067         }
2068
2069         /* Descriptor for chosen Tx queue */
2070         txq = &priv->txq[txq_id];
2071         q = &txq->q;
2072
2073         spin_lock_irqsave(&priv->lock, flags);
2074
2075         /* Set up first empty TFD within this queue's circular TFD buffer */
2076         tfd = &txq->bd[q->write_ptr];
2077         memset(tfd, 0, sizeof(*tfd));
2078         control_flags = (u32 *) tfd;
2079         idx = get_cmd_index(q, q->write_ptr, 0);
2080
2081         /* Set up driver data for this TFD */
2082         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2083         txq->txb[q->write_ptr].skb[0] = skb;
2084         memcpy(&(txq->txb[q->write_ptr].status.control),
2085                ctl, sizeof(struct ieee80211_tx_control));
2086
2087         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2088         out_cmd = &txq->cmd[idx];
2089         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2090         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2091
2092         /*
2093          * Set up the Tx-command (not MAC!) header.
2094          * Store the chosen Tx queue and TFD index within the sequence field;
2095          * after Tx, uCode's Tx response will return this value so driver can
2096          * locate the frame within the tx queue and do post-tx processing.
2097          */
2098         out_cmd->hdr.cmd = REPLY_TX;
2099         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2100                                 INDEX_TO_SEQ(q->write_ptr)));
2101
2102         /* Copy MAC header from skb into command buffer */
2103         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2104
2105         /*
2106          * Use the first empty entry in this queue's command buffer array
2107          * to contain the Tx command and MAC header concatenated together
2108          * (payload data will be in another buffer).
2109          * Size of this varies, due to varying MAC header length.
2110          * If end is not dword aligned, we'll have 2 extra bytes at the end
2111          * of the MAC header (device reads on dword boundaries).
2112          * We'll tell device about this padding later.
2113          */
2114         len = priv->hw_params.tx_cmd_len +
2115                 sizeof(struct iwl_cmd_header) + hdr_len;
2116
2117         len_org = len;
2118         len = (len + 3) & ~3;
2119
2120         if (len_org != len)
2121                 len_org = 1;
2122         else
2123                 len_org = 0;
2124
2125         /* Physical address of this Tx command's header (not MAC header!),
2126          * within command buffer array. */
2127         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2128                      offsetof(struct iwl_cmd, hdr);
2129
2130         /* Add buffer containing Tx command and MAC(!) header to TFD's
2131          * first entry */
2132         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2133
2134         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2135                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2136
2137         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2138          * if any (802.11 null frames have no payload). */
2139         len = skb->len - hdr_len;
2140         if (len) {
2141                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2142                                            len, PCI_DMA_TODEVICE);
2143                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2144         }
2145
2146         /* Tell 4965 about any 2-byte padding after MAC header */
2147         if (len_org)
2148                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2149
2150         /* Total # bytes to be transmitted */
2151         len = (u16)skb->len;
2152         out_cmd->cmd.tx.len = cpu_to_le16(len);
2153
2154         /* TODO need this for burst mode later on */
2155         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2156
2157         /* set is_hcca to 0; it probably will never be implemented */
2158         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2159
2160         iwl_update_tx_stats(priv, fc, len);
2161
2162         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2163                 offsetof(struct iwl4965_tx_cmd, scratch);
2164         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2165         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2166
2167         if (!ieee80211_get_morefrag(hdr)) {
2168                 txq->need_update = 1;
2169                 if (qc) {
2170                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2171                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2172                 }
2173         } else {
2174                 wait_write_ptr = 1;
2175                 txq->need_update = 0;
2176         }
2177
2178         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2179                            sizeof(out_cmd->cmd.tx));
2180
2181         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2182                            ieee80211_get_hdrlen(fc));
2183
2184         /* Set up entry for this TFD in Tx byte-count array */
2185         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2186
2187         /* Tell device the write index *just past* this latest filled TFD */
2188         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2189         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2190         spin_unlock_irqrestore(&priv->lock, flags);
2191
2192         if (rc)
2193                 return rc;
2194
2195         if ((iwl4965_queue_space(q) < q->high_mark)
2196             && priv->mac80211_registered) {
2197                 if (wait_write_ptr) {
2198                         spin_lock_irqsave(&priv->lock, flags);
2199                         txq->need_update = 1;
2200                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2201                         spin_unlock_irqrestore(&priv->lock, flags);
2202                 }
2203
2204                 ieee80211_stop_queue(priv->hw, ctl->queue);
2205         }
2206
2207         return 0;
2208
2209 drop_unlock:
2210         spin_unlock_irqrestore(&priv->lock, flags);
2211 drop:
2212         return -1;
2213 }
2214
2215 static void iwl4965_set_rate(struct iwl_priv *priv)
2216 {
2217         const struct ieee80211_supported_band *hw = NULL;
2218         struct ieee80211_rate *rate;
2219         int i;
2220
2221         hw = iwl_get_hw_mode(priv, priv->band);
2222         if (!hw) {
2223                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2224                 return;
2225         }
2226
2227         priv->active_rate = 0;
2228         priv->active_rate_basic = 0;
2229
2230         for (i = 0; i < hw->n_bitrates; i++) {
2231                 rate = &(hw->bitrates[i]);
2232                 if (rate->hw_value < IWL_RATE_COUNT)
2233                         priv->active_rate |= (1 << rate->hw_value);
2234         }
2235
2236         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2237                        priv->active_rate, priv->active_rate_basic);
2238
2239         /*
2240          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2241          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2242          * OFDM
2243          */
2244         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2245                 priv->staging_rxon.cck_basic_rates =
2246                     ((priv->active_rate_basic &
2247                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2248         else
2249                 priv->staging_rxon.cck_basic_rates =
2250                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2251
2252         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2253                 priv->staging_rxon.ofdm_basic_rates =
2254                     ((priv->active_rate_basic &
2255                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2256                       IWL_FIRST_OFDM_RATE) & 0xFF;
2257         else
2258                 priv->staging_rxon.ofdm_basic_rates =
2259                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2260 }
2261
2262 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2263 {
2264         unsigned long flags;
2265
2266         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2267                 return;
2268
2269         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2270                           disable_radio ? "OFF" : "ON");
2271
2272         if (disable_radio) {
2273                 iwl4965_scan_cancel(priv);
2274                 /* FIXME: This is a workaround for AP */
2275                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2276                         spin_lock_irqsave(&priv->lock, flags);
2277                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2278                                     CSR_UCODE_SW_BIT_RFKILL);
2279                         spin_unlock_irqrestore(&priv->lock, flags);
2280                         /* call the host command only if no hw rf-kill set */
2281                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2282                             iwl_is_ready(priv))
2283                                 iwl4965_send_card_state(priv,
2284                                                         CARD_STATE_CMD_DISABLE,
2285                                                         0);
2286                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2287
2288                         /* make sure mac80211 stop sending Tx frame */
2289                         if (priv->mac80211_registered)
2290                                 ieee80211_stop_queues(priv->hw);
2291                 }
2292                 return;
2293         }
2294
2295         spin_lock_irqsave(&priv->lock, flags);
2296         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2297
2298         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2299         spin_unlock_irqrestore(&priv->lock, flags);
2300
2301         /* wake up ucode */
2302         msleep(10);
2303
2304         spin_lock_irqsave(&priv->lock, flags);
2305         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2306         if (!iwl_grab_nic_access(priv))
2307                 iwl_release_nic_access(priv);
2308         spin_unlock_irqrestore(&priv->lock, flags);
2309
2310         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2311                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2312                                   "disabled by HW switch\n");
2313                 return;
2314         }
2315
2316         queue_work(priv->workqueue, &priv->restart);
2317         return;
2318 }
2319
2320 #define IWL_PACKET_RETRY_TIME HZ
2321
2322 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2323 {
2324         u16 sc = le16_to_cpu(header->seq_ctrl);
2325         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2326         u16 frag = sc & IEEE80211_SCTL_FRAG;
2327         u16 *last_seq, *last_frag;
2328         unsigned long *last_time;
2329
2330         switch (priv->iw_mode) {
2331         case IEEE80211_IF_TYPE_IBSS:{
2332                 struct list_head *p;
2333                 struct iwl4965_ibss_seq *entry = NULL;
2334                 u8 *mac = header->addr2;
2335                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2336
2337                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2338                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2339                         if (!compare_ether_addr(entry->mac, mac))
2340                                 break;
2341                 }
2342                 if (p == &priv->ibss_mac_hash[index]) {
2343                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2344                         if (!entry) {
2345                                 IWL_ERROR("Cannot malloc new mac entry\n");
2346                                 return 0;
2347                         }
2348                         memcpy(entry->mac, mac, ETH_ALEN);
2349                         entry->seq_num = seq;
2350                         entry->frag_num = frag;
2351                         entry->packet_time = jiffies;
2352                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2353                         return 0;
2354                 }
2355                 last_seq = &entry->seq_num;
2356                 last_frag = &entry->frag_num;
2357                 last_time = &entry->packet_time;
2358                 break;
2359         }
2360         case IEEE80211_IF_TYPE_STA:
2361                 last_seq = &priv->last_seq_num;
2362                 last_frag = &priv->last_frag_num;
2363                 last_time = &priv->last_packet_time;
2364                 break;
2365         default:
2366                 return 0;
2367         }
2368         if ((*last_seq == seq) &&
2369             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2370                 if (*last_frag == frag)
2371                         goto drop;
2372                 if (*last_frag + 1 != frag)
2373                         /* out-of-order fragment */
2374                         goto drop;
2375         } else
2376                 *last_seq = seq;
2377
2378         *last_frag = frag;
2379         *last_time = jiffies;
2380         return 0;
2381
2382  drop:
2383         return 1;
2384 }
2385
2386 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2387
2388 #include "iwl-spectrum.h"
2389
2390 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2391 #define BEACON_TIME_MASK_HIGH   0xFF000000
2392 #define TIME_UNIT               1024
2393
2394 /*
2395  * extended beacon time format
2396  * time in usec will be changed into a 32-bit value in 8:24 format
2397  * the high 1 byte is the beacon counts
2398  * the lower 3 bytes is the time in usec within one beacon interval
2399  */
2400
2401 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2402 {
2403         u32 quot;
2404         u32 rem;
2405         u32 interval = beacon_interval * 1024;
2406
2407         if (!interval || !usec)
2408                 return 0;
2409
2410         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2411         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2412
2413         return (quot << 24) + rem;
2414 }
2415
2416 /* base is usually what we get from ucode with each received frame,
2417  * the same as HW timer counter counting down
2418  */
2419
2420 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2421 {
2422         u32 base_low = base & BEACON_TIME_MASK_LOW;
2423         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2424         u32 interval = beacon_interval * TIME_UNIT;
2425         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2426             (addon & BEACON_TIME_MASK_HIGH);
2427
2428         if (base_low > addon_low)
2429                 res += base_low - addon_low;
2430         else if (base_low < addon_low) {
2431                 res += interval + base_low - addon_low;
2432                 res += (1 << 24);
2433         } else
2434                 res += (1 << 24);
2435
2436         return cpu_to_le32(res);
2437 }
2438
2439 static int iwl4965_get_measurement(struct iwl_priv *priv,
2440                                struct ieee80211_measurement_params *params,
2441                                u8 type)
2442 {
2443         struct iwl4965_spectrum_cmd spectrum;
2444         struct iwl_rx_packet *res;
2445         struct iwl_host_cmd cmd = {
2446                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2447                 .data = (void *)&spectrum,
2448                 .meta.flags = CMD_WANT_SKB,
2449         };
2450         u32 add_time = le64_to_cpu(params->start_time);
2451         int rc;
2452         int spectrum_resp_status;
2453         int duration = le16_to_cpu(params->duration);
2454
2455         if (iwl_is_associated(priv))
2456                 add_time =
2457                     iwl4965_usecs_to_beacons(
2458                         le64_to_cpu(params->start_time) - priv->last_tsf,
2459                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2460
2461         memset(&spectrum, 0, sizeof(spectrum));
2462
2463         spectrum.channel_count = cpu_to_le16(1);
2464         spectrum.flags =
2465             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2466         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2467         cmd.len = sizeof(spectrum);
2468         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2469
2470         if (iwl_is_associated(priv))
2471                 spectrum.start_time =
2472                     iwl4965_add_beacon_time(priv->last_beacon_time,
2473                                 add_time,
2474                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2475         else
2476                 spectrum.start_time = 0;
2477
2478         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2479         spectrum.channels[0].channel = params->channel;
2480         spectrum.channels[0].type = type;
2481         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2482                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2483                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2484
2485         rc = iwl_send_cmd_sync(priv, &cmd);
2486         if (rc)
2487                 return rc;
2488
2489         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
2490         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2491                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2492                 rc = -EIO;
2493         }
2494
2495         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2496         switch (spectrum_resp_status) {
2497         case 0:         /* Command will be handled */
2498                 if (res->u.spectrum.id != 0xff) {
2499                         IWL_DEBUG_INFO
2500                             ("Replaced existing measurement: %d\n",
2501                              res->u.spectrum.id);
2502                         priv->measurement_status &= ~MEASUREMENT_READY;
2503                 }
2504                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2505                 rc = 0;
2506                 break;
2507
2508         case 1:         /* Command will not be handled */
2509                 rc = -EAGAIN;
2510                 break;
2511         }
2512
2513         dev_kfree_skb_any(cmd.meta.u.skb);
2514
2515         return rc;
2516 }
2517 #endif
2518
2519 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2520                                  struct iwl4965_tx_info *tx_sta)
2521 {
2522
2523         tx_sta->status.ack_signal = 0;
2524         tx_sta->status.excessive_retries = 0;
2525
2526         if (in_interrupt())
2527                 ieee80211_tx_status_irqsafe(priv->hw,
2528                                             tx_sta->skb[0], &(tx_sta->status));
2529         else
2530                 ieee80211_tx_status(priv->hw,
2531                                     tx_sta->skb[0], &(tx_sta->status));
2532
2533         tx_sta->skb[0] = NULL;
2534 }
2535
2536 /**
2537  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2538  *
2539  * When FW advances 'R' index, all entries between old and new 'R' index
2540  * need to be reclaimed. As result, some free space forms.  If there is
2541  * enough free space (> low mark), wake the stack that feeds us.
2542  */
2543 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2544 {
2545         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2546         struct iwl4965_queue *q = &txq->q;
2547         int nfreed = 0;
2548
2549         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2550                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2551                           "is out of range [0-%d] %d %d.\n", txq_id,
2552                           index, q->n_bd, q->write_ptr, q->read_ptr);
2553                 return 0;
2554         }
2555
2556         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2557                 q->read_ptr != index;
2558                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2559                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2560                         iwl4965_txstatus_to_ieee(priv,
2561                                         &(txq->txb[txq->q.read_ptr]));
2562                         iwl4965_hw_txq_free_tfd(priv, txq);
2563                 } else if (nfreed > 1) {
2564                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2565                                         q->write_ptr, q->read_ptr);
2566                         queue_work(priv->workqueue, &priv->restart);
2567                 }
2568                 nfreed++;
2569         }
2570
2571         return nfreed;
2572 }
2573
2574 static int iwl4965_is_tx_success(u32 status)
2575 {
2576         status &= TX_STATUS_MSK;
2577         return (status == TX_STATUS_SUCCESS)
2578             || (status == TX_STATUS_DIRECT_DONE);
2579 }
2580
2581 /******************************************************************************
2582  *
2583  * Generic RX handler implementations
2584  *
2585  ******************************************************************************/
2586 #ifdef CONFIG_IWL4965_HT
2587
2588 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2589                                     struct ieee80211_hdr *hdr)
2590 {
2591         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2592                 return IWL_AP_ID;
2593         else {
2594                 u8 *da = ieee80211_get_DA(hdr);
2595                 return iwl_find_station(priv, da);
2596         }
2597 }
2598
2599 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2600         struct iwl_priv *priv, int txq_id, int idx)
2601 {
2602         if (priv->txq[txq_id].txb[idx].skb[0])
2603                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2604                                 txb[idx].skb[0]->data;
2605         return NULL;
2606 }
2607
2608 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2609 {
2610         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2611                                 tx_resp->frame_count);
2612         return le32_to_cpu(*scd_ssn) & MAX_SN;
2613
2614 }
2615
2616 /**
2617  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2618  */
2619 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2620                                       struct iwl_ht_agg *agg,
2621                                       struct iwl4965_tx_resp_agg *tx_resp,
2622                                       u16 start_idx)
2623 {
2624         u16 status;
2625         struct agg_tx_status *frame_status = &tx_resp->status;
2626         struct ieee80211_tx_status *tx_status = NULL;
2627         struct ieee80211_hdr *hdr = NULL;
2628         int i, sh;
2629         int txq_id, idx;
2630         u16 seq;
2631
2632         if (agg->wait_for_ba)
2633                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2634
2635         agg->frame_count = tx_resp->frame_count;
2636         agg->start_idx = start_idx;
2637         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2638         agg->bitmap = 0;
2639
2640         /* # frames attempted by Tx command */
2641         if (agg->frame_count == 1) {
2642                 /* Only one frame was attempted; no block-ack will arrive */
2643                 status = le16_to_cpu(frame_status[0].status);
2644                 seq  = le16_to_cpu(frame_status[0].sequence);
2645                 idx = SEQ_TO_INDEX(seq);
2646                 txq_id = SEQ_TO_QUEUE(seq);
2647
2648                 /* FIXME: code repetition */
2649                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2650                                    agg->frame_count, agg->start_idx, idx);
2651
2652                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2653                 tx_status->retry_count = tx_resp->failure_frame;
2654                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2655                 tx_status->flags = iwl4965_is_tx_success(status)?
2656                         IEEE80211_TX_STATUS_ACK : 0;
2657                 iwl4965_hwrate_to_tx_control(priv,
2658                                              le32_to_cpu(tx_resp->rate_n_flags),
2659                                              &tx_status->control);
2660                 /* FIXME: code repetition end */
2661
2662                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2663                                     status & 0xff, tx_resp->failure_frame);
2664                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2665                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2666
2667                 agg->wait_for_ba = 0;
2668         } else {
2669                 /* Two or more frames were attempted; expect block-ack */
2670                 u64 bitmap = 0;
2671                 int start = agg->start_idx;
2672
2673                 /* Construct bit-map of pending frames within Tx window */
2674                 for (i = 0; i < agg->frame_count; i++) {
2675                         u16 sc;
2676                         status = le16_to_cpu(frame_status[i].status);
2677                         seq  = le16_to_cpu(frame_status[i].sequence);
2678                         idx = SEQ_TO_INDEX(seq);
2679                         txq_id = SEQ_TO_QUEUE(seq);
2680
2681                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2682                                       AGG_TX_STATE_ABORT_MSK))
2683                                 continue;
2684
2685                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2686                                            agg->frame_count, txq_id, idx);
2687
2688                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2689
2690                         sc = le16_to_cpu(hdr->seq_ctrl);
2691                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2692                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2693                                           " idx=%d, seq_idx=%d, seq=%d\n",
2694                                           idx, SEQ_TO_SN(sc),
2695                                           hdr->seq_ctrl);
2696                                 return -1;
2697                         }
2698
2699                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2700                                            i, idx, SEQ_TO_SN(sc));
2701
2702                         sh = idx - start;
2703                         if (sh > 64) {
2704                                 sh = (start - idx) + 0xff;
2705                                 bitmap = bitmap << sh;
2706                                 sh = 0;
2707                                 start = idx;
2708                         } else if (sh < -64)
2709                                 sh  = 0xff - (start - idx);
2710                         else if (sh < 0) {
2711                                 sh = start - idx;
2712                                 start = idx;
2713                                 bitmap = bitmap << sh;
2714                                 sh = 0;
2715                         }
2716                         bitmap |= (1 << sh);
2717                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2718                                            start, (u32)(bitmap & 0xFFFFFFFF));
2719                 }
2720
2721                 agg->bitmap = bitmap;
2722                 agg->start_idx = start;
2723                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2724                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2725                                    agg->frame_count, agg->start_idx,
2726                                    (unsigned long long)agg->bitmap);
2727
2728                 if (bitmap)
2729                         agg->wait_for_ba = 1;
2730         }
2731         return 0;
2732 }
2733 #endif
2734
2735 /**
2736  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2737  */
2738 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2739                                 struct iwl_rx_mem_buffer *rxb)
2740 {
2741         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2742         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2743         int txq_id = SEQ_TO_QUEUE(sequence);
2744         int index = SEQ_TO_INDEX(sequence);
2745         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2746         struct ieee80211_tx_status *tx_status;
2747         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2748         u32  status = le32_to_cpu(tx_resp->status);
2749 #ifdef CONFIG_IWL4965_HT
2750         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2751         struct ieee80211_hdr *hdr;
2752         __le16 *qc;
2753 #endif
2754
2755         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2756                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2757                           "is out of range [0-%d] %d %d\n", txq_id,
2758                           index, txq->q.n_bd, txq->q.write_ptr,
2759                           txq->q.read_ptr);
2760                 return;
2761         }
2762
2763 #ifdef CONFIG_IWL4965_HT
2764         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2765         qc = ieee80211_get_qos_ctrl(hdr);
2766
2767         if (qc)
2768                 tid = le16_to_cpu(*qc) & 0xf;
2769
2770         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2771         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2772                 IWL_ERROR("Station not known\n");
2773                 return;
2774         }
2775
2776         if (txq->sched_retry) {
2777                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2778                 struct iwl_ht_agg *agg = NULL;
2779
2780                 if (!qc)
2781                         return;
2782
2783                 agg = &priv->stations[sta_id].tid[tid].agg;
2784
2785                 iwl4965_tx_status_reply_tx(priv, agg,
2786                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2787
2788                 if ((tx_resp->frame_count == 1) &&
2789                     !iwl4965_is_tx_success(status)) {
2790                         /* TODO: send BAR */
2791                 }
2792
2793                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2794                         int freed, ampdu_q;
2795                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2796                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2797                                            "%d index %d\n", scd_ssn , index);
2798                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2799                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2800
2801                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2802                             txq_id >= 0 && priv->mac80211_registered &&
2803                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
2804                                 /* calculate mac80211 ampdu sw queue to wake */
2805                                 ampdu_q = txq_id - IWL_BACK_QUEUE_FIRST_ID +
2806                                           priv->hw->queues;
2807                                 if (agg->state == IWL_AGG_OFF)
2808                                         ieee80211_wake_queue(priv->hw, txq_id);
2809                                 else
2810                                         ieee80211_wake_queue(priv->hw, ampdu_q);
2811                         }
2812                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2813                 }
2814         } else {
2815 #endif /* CONFIG_IWL4965_HT */
2816         tx_status = &(txq->txb[txq->q.read_ptr].status);
2817
2818         tx_status->retry_count = tx_resp->failure_frame;
2819         tx_status->flags =
2820             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2821         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2822                                      &tx_status->control);
2823
2824         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2825                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2826                      status, le32_to_cpu(tx_resp->rate_n_flags),
2827                      tx_resp->failure_frame);
2828
2829         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2830         if (index != -1) {
2831                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2832 #ifdef CONFIG_IWL4965_HT
2833                 if (tid != MAX_TID_COUNT)
2834                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2835                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2836                         (txq_id >= 0) && priv->mac80211_registered)
2837                         ieee80211_wake_queue(priv->hw, txq_id);
2838                 if (tid != MAX_TID_COUNT)
2839                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2840 #endif
2841         }
2842 #ifdef CONFIG_IWL4965_HT
2843         }
2844 #endif /* CONFIG_IWL4965_HT */
2845
2846         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2847                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2848 }
2849
2850
2851 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2852                                    struct iwl_rx_mem_buffer *rxb)
2853 {
2854         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2855         struct iwl4965_alive_resp *palive;
2856         struct delayed_work *pwork;
2857
2858         palive = &pkt->u.alive_frame;
2859
2860         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2861                        "0x%01X 0x%01X\n",
2862                        palive->is_valid, palive->ver_type,
2863                        palive->ver_subtype);
2864
2865         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2866                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2867                 memcpy(&priv->card_alive_init,
2868                        &pkt->u.alive_frame,
2869                        sizeof(struct iwl4965_init_alive_resp));
2870                 pwork = &priv->init_alive_start;
2871         } else {
2872                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2873                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2874                        sizeof(struct iwl4965_alive_resp));
2875                 pwork = &priv->alive_start;
2876         }
2877
2878         /* We delay the ALIVE response by 5ms to
2879          * give the HW RF Kill time to activate... */
2880         if (palive->is_valid == UCODE_VALID_OK)
2881                 queue_delayed_work(priv->workqueue, pwork,
2882                                    msecs_to_jiffies(5));
2883         else
2884                 IWL_WARNING("uCode did not respond OK.\n");
2885 }
2886
2887 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2888                                      struct iwl_rx_mem_buffer *rxb)
2889 {
2890         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2891
2892         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2893         return;
2894 }
2895
2896 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2897                                    struct iwl_rx_mem_buffer *rxb)
2898 {
2899         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2900
2901         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2902                 "seq 0x%04X ser 0x%08X\n",
2903                 le32_to_cpu(pkt->u.err_resp.error_type),
2904                 get_cmd_string(pkt->u.err_resp.cmd_id),
2905                 pkt->u.err_resp.cmd_id,
2906                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2907                 le32_to_cpu(pkt->u.err_resp.error_info));
2908 }
2909
2910 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2911
2912 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
2913 {
2914         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2915         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2916         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2917         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2918                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2919         rxon->channel = csa->channel;
2920         priv->staging_rxon.channel = csa->channel;
2921 }
2922
2923 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2924                                           struct iwl_rx_mem_buffer *rxb)
2925 {
2926 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2927         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2928         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2929
2930         if (!report->state) {
2931                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2932                           "Spectrum Measure Notification: Start\n");
2933                 return;
2934         }
2935
2936         memcpy(&priv->measure_report, report, sizeof(*report));
2937         priv->measurement_status |= MEASUREMENT_READY;
2938 #endif
2939 }
2940
2941 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2942                                       struct iwl_rx_mem_buffer *rxb)
2943 {
2944 #ifdef CONFIG_IWLWIFI_DEBUG
2945         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2946         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2947         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2948                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2949 #endif
2950 }
2951
2952 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2953                                              struct iwl_rx_mem_buffer *rxb)
2954 {
2955         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2956         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2957                         "notification for %s:\n",
2958                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2959         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2960 }
2961
2962 static void iwl4965_bg_beacon_update(struct work_struct *work)
2963 {
2964         struct iwl_priv *priv =
2965                 container_of(work, struct iwl_priv, beacon_update);
2966         struct sk_buff *beacon;
2967
2968         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2969         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2970
2971         if (!beacon) {
2972                 IWL_ERROR("update beacon failed\n");
2973                 return;
2974         }
2975
2976         mutex_lock(&priv->mutex);
2977         /* new beacon skb is allocated every time; dispose previous.*/
2978         if (priv->ibss_beacon)
2979                 dev_kfree_skb(priv->ibss_beacon);
2980
2981         priv->ibss_beacon = beacon;
2982         mutex_unlock(&priv->mutex);
2983
2984         iwl4965_send_beacon_cmd(priv);
2985 }
2986
2987 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2988                                 struct iwl_rx_mem_buffer *rxb)
2989 {
2990 #ifdef CONFIG_IWLWIFI_DEBUG
2991         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2992         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
2993         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
2994
2995         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
2996                 "tsf %d %d rate %d\n",
2997                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
2998                 beacon->beacon_notify_hdr.failure_frame,
2999                 le32_to_cpu(beacon->ibss_mgr_status),
3000                 le32_to_cpu(beacon->high_tsf),
3001                 le32_to_cpu(beacon->low_tsf), rate);
3002 #endif
3003
3004         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3005             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3006                 queue_work(priv->workqueue, &priv->beacon_update);
3007 }
3008
3009 /* Service response to REPLY_SCAN_CMD (0x80) */
3010 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3011                               struct iwl_rx_mem_buffer *rxb)
3012 {
3013 #ifdef CONFIG_IWLWIFI_DEBUG
3014         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3015         struct iwl4965_scanreq_notification *notif =
3016             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3017
3018         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3019 #endif
3020 }
3021
3022 /* Service SCAN_START_NOTIFICATION (0x82) */
3023 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3024                                     struct iwl_rx_mem_buffer *rxb)
3025 {
3026         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3027         struct iwl4965_scanstart_notification *notif =
3028             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3029         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3030         IWL_DEBUG_SCAN("Scan start: "
3031                        "%d [802.11%s] "
3032                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3033                        notif->channel,
3034                        notif->band ? "bg" : "a",
3035                        notif->tsf_high,
3036                        notif->tsf_low, notif->status, notif->beacon_timer);
3037 }
3038
3039 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3040 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3041                                       struct iwl_rx_mem_buffer *rxb)
3042 {
3043         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3044         struct iwl4965_scanresults_notification *notif =
3045             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3046
3047         IWL_DEBUG_SCAN("Scan ch.res: "
3048                        "%d [802.11%s] "
3049                        "(TSF: 0x%08X:%08X) - %d "
3050                        "elapsed=%lu usec (%dms since last)\n",
3051                        notif->channel,
3052                        notif->band ? "bg" : "a",
3053                        le32_to_cpu(notif->tsf_high),
3054                        le32_to_cpu(notif->tsf_low),
3055                        le32_to_cpu(notif->statistics[0]),
3056                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3057                        jiffies_to_msecs(elapsed_jiffies
3058                                         (priv->last_scan_jiffies, jiffies)));
3059
3060         priv->last_scan_jiffies = jiffies;
3061         priv->next_scan_jiffies = 0;
3062 }
3063
3064 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3065 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3066                                        struct iwl_rx_mem_buffer *rxb)
3067 {
3068         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3069         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3070
3071         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3072                        scan_notif->scanned_channels,
3073                        scan_notif->tsf_low,
3074                        scan_notif->tsf_high, scan_notif->status);
3075
3076         /* The HW is no longer scanning */
3077         clear_bit(STATUS_SCAN_HW, &priv->status);
3078
3079         /* The scan completion notification came in, so kill that timer... */
3080         cancel_delayed_work(&priv->scan_check);
3081
3082         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3083                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3084                        jiffies_to_msecs(elapsed_jiffies
3085                                         (priv->scan_pass_start, jiffies)));
3086
3087         /* Remove this scanned band from the list
3088          * of pending bands to scan */
3089         priv->scan_bands--;
3090
3091         /* If a request to abort was given, or the scan did not succeed
3092          * then we reset the scan state machine and terminate,
3093          * re-queuing another scan if one has been requested */
3094         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3095                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3096                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3097         } else {
3098                 /* If there are more bands on this scan pass reschedule */
3099                 if (priv->scan_bands > 0)
3100                         goto reschedule;
3101         }
3102
3103         priv->last_scan_jiffies = jiffies;
3104         priv->next_scan_jiffies = 0;
3105         IWL_DEBUG_INFO("Setting scan to off\n");
3106
3107         clear_bit(STATUS_SCANNING, &priv->status);
3108
3109         IWL_DEBUG_INFO("Scan took %dms\n",
3110                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3111
3112         queue_work(priv->workqueue, &priv->scan_completed);
3113
3114         return;
3115
3116 reschedule:
3117         priv->scan_pass_start = jiffies;
3118         queue_work(priv->workqueue, &priv->request_scan);
3119 }
3120
3121 /* Handle notification from uCode that card's power state is changing
3122  * due to software, hardware, or critical temperature RFKILL */
3123 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3124                                     struct iwl_rx_mem_buffer *rxb)
3125 {
3126         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3127         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3128         unsigned long status = priv->status;
3129
3130         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3131                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3132                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3133
3134         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3135                      RF_CARD_DISABLED)) {
3136
3137                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3138                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3139
3140                 if (!iwl_grab_nic_access(priv)) {
3141                         iwl_write_direct32(
3142                                 priv, HBUS_TARG_MBX_C,
3143                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3144
3145                         iwl_release_nic_access(priv);
3146                 }
3147
3148                 if (!(flags & RXON_CARD_DISABLED)) {
3149                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3150                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3151                         if (!iwl_grab_nic_access(priv)) {
3152                                 iwl_write_direct32(
3153                                         priv, HBUS_TARG_MBX_C,
3154                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3155
3156                                 iwl_release_nic_access(priv);
3157                         }
3158                 }
3159
3160                 if (flags & RF_CARD_DISABLED) {
3161                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3162                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3163                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3164                         if (!iwl_grab_nic_access(priv))
3165                                 iwl_release_nic_access(priv);
3166                 }
3167         }
3168
3169         if (flags & HW_CARD_DISABLED)
3170                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3171         else
3172                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3173
3174
3175         if (flags & SW_CARD_DISABLED)
3176                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3177         else
3178                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3179
3180         if (!(flags & RXON_CARD_DISABLED))
3181                 iwl4965_scan_cancel(priv);
3182
3183         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3184              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3185             (test_bit(STATUS_RF_KILL_SW, &status) !=
3186              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3187                 queue_work(priv->workqueue, &priv->rf_kill);
3188         else
3189                 wake_up_interruptible(&priv->wait_command_queue);
3190 }
3191
3192 /**
3193  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3194  *
3195  * Setup the RX handlers for each of the reply types sent from the uCode
3196  * to the host.
3197  *
3198  * This function chains into the hardware specific files for them to setup
3199  * any hardware specific handlers as well.
3200  */
3201 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3202 {
3203         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3204         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3205         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3206         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3207         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3208             iwl4965_rx_spectrum_measure_notif;
3209         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3210         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3211             iwl4965_rx_pm_debug_statistics_notif;
3212         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3213
3214         /*
3215          * The same handler is used for both the REPLY to a discrete
3216          * statistics request from the host as well as for the periodic
3217          * statistics notifications (after received beacons) from the uCode.
3218          */
3219         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3220         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3221
3222         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3223         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3224         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3225             iwl4965_rx_scan_results_notif;
3226         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3227             iwl4965_rx_scan_complete_notif;
3228         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3229         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3230
3231         /* Set up hardware specific Rx handlers */
3232         priv->cfg->ops->lib->rx_handler_setup(priv);
3233 }
3234
3235 /**
3236  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3237  * @rxb: Rx buffer to reclaim
3238  *
3239  * If an Rx buffer has an async callback associated with it the callback
3240  * will be executed.  The attached skb (if present) will only be freed
3241  * if the callback returns 1
3242  */
3243 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3244                                     struct iwl_rx_mem_buffer *rxb)
3245 {
3246         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3247         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3248         int txq_id = SEQ_TO_QUEUE(sequence);
3249         int index = SEQ_TO_INDEX(sequence);
3250         int huge = sequence & SEQ_HUGE_FRAME;
3251         int cmd_index;
3252         struct iwl_cmd *cmd;
3253
3254         /* If a Tx command is being handled and it isn't in the actual
3255          * command queue then there a command routing bug has been introduced
3256          * in the queue management code. */
3257         if (txq_id != IWL_CMD_QUEUE_NUM)
3258                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3259                           txq_id, pkt->hdr.cmd);
3260         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3261
3262         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3263         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3264
3265         /* Input error checking is done when commands are added to queue. */
3266         if (cmd->meta.flags & CMD_WANT_SKB) {
3267                 cmd->meta.source->u.skb = rxb->skb;
3268                 rxb->skb = NULL;
3269         } else if (cmd->meta.u.callback &&
3270                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3271                 rxb->skb = NULL;
3272
3273         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3274
3275         if (!(cmd->meta.flags & CMD_ASYNC)) {
3276                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3277                 wake_up_interruptible(&priv->wait_command_queue);
3278         }
3279 }
3280
3281 /*
3282  * this should be called while priv->lock is locked
3283 */
3284 static void __iwl_rx_replenish(struct iwl_priv *priv)
3285 {
3286         iwl_rx_allocate(priv);
3287         iwl_rx_queue_restock(priv);
3288 }
3289
3290
3291 /**
3292  * iwl_rx_handle - Main entry function for receiving responses from uCode
3293  *
3294  * Uses the priv->rx_handlers callback function array to invoke
3295  * the appropriate handlers, including command responses,
3296  * frame-received notifications, and other notifications.
3297  */
3298 void iwl_rx_handle(struct iwl_priv *priv)
3299 {
3300         struct iwl_rx_mem_buffer *rxb;
3301         struct iwl_rx_packet *pkt;
3302         struct iwl_rx_queue *rxq = &priv->rxq;
3303         u32 r, i;
3304         int reclaim;
3305         unsigned long flags;
3306         u8 fill_rx = 0;
3307         u32 count = 8;
3308
3309         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3310          * buffer that the driver may process (last buffer filled by ucode). */
3311         r = iwl4965_hw_get_rx_read(priv);
3312         i = rxq->read;
3313
3314         /* Rx interrupt, but nothing sent from uCode */
3315         if (i == r)
3316                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3317
3318         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3319                 fill_rx = 1;
3320
3321         while (i != r) {
3322                 rxb = rxq->queue[i];
3323
3324                 /* If an RXB doesn't have a Rx queue slot associated with it,
3325                  * then a bug has been introduced in the queue refilling
3326                  * routines -- catch it here */
3327                 BUG_ON(rxb == NULL);
3328
3329                 rxq->queue[i] = NULL;
3330
3331                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3332                                             priv->hw_params.rx_buf_size,
3333                                             PCI_DMA_FROMDEVICE);
3334                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
3335
3336                 /* Reclaim a command buffer only if this packet is a response
3337                  *   to a (driver-originated) command.
3338                  * If the packet (e.g. Rx frame) originated from uCode,
3339                  *   there is no command buffer to reclaim.
3340                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3341                  *   but apparently a few don't get set; catch them here. */
3342                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3343                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3344                         (pkt->hdr.cmd != REPLY_RX) &&
3345                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3346                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3347                         (pkt->hdr.cmd != REPLY_TX);
3348
3349                 /* Based on type of command response or notification,
3350                  *   handle those that need handling via function in
3351                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3352                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3353                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3354                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3355                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3356                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3357                 } else {
3358                         /* No handling needed */
3359                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3360                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3361                                 r, i, get_cmd_string(pkt->hdr.cmd),
3362                                 pkt->hdr.cmd);
3363                 }
3364
3365                 if (reclaim) {
3366                         /* Invoke any callbacks, transfer the skb to caller, and
3367                          * fire off the (possibly) blocking iwl_send_cmd()
3368                          * as we reclaim the driver command queue */
3369                         if (rxb && rxb->skb)
3370                                 iwl4965_tx_cmd_complete(priv, rxb);
3371                         else
3372                                 IWL_WARNING("Claim null rxb?\n");
3373                 }
3374
3375                 /* For now we just don't re-use anything.  We can tweak this
3376                  * later to try and re-use notification packets and SKBs that
3377                  * fail to Rx correctly */
3378                 if (rxb->skb != NULL) {
3379                         priv->alloc_rxb_skb--;
3380                         dev_kfree_skb_any(rxb->skb);
3381                         rxb->skb = NULL;
3382                 }
3383
3384                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3385                                  priv->hw_params.rx_buf_size,
3386                                  PCI_DMA_FROMDEVICE);
3387                 spin_lock_irqsave(&rxq->lock, flags);
3388                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3389                 spin_unlock_irqrestore(&rxq->lock, flags);
3390                 i = (i + 1) & RX_QUEUE_MASK;
3391                 /* If there are a lot of unused frames,
3392                  * restock the Rx queue so ucode wont assert. */
3393                 if (fill_rx) {
3394                         count++;
3395                         if (count >= 8) {
3396                                 priv->rxq.read = i;
3397                                 __iwl_rx_replenish(priv);
3398                                 count = 0;
3399                         }
3400                 }
3401         }
3402
3403         /* Backtrack one entry */
3404         priv->rxq.read = i;
3405         iwl_rx_queue_restock(priv);
3406 }
3407 /* Convert linear signal-to-noise ratio into dB */
3408 static u8 ratio2dB[100] = {
3409 /*       0   1   2   3   4   5   6   7   8   9 */
3410          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3411         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3412         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3413         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3414         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3415         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3416         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3417         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3418         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3419         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3420 };
3421
3422 /* Calculates a relative dB value from a ratio of linear
3423  *   (i.e. not dB) signal levels.
3424  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3425 int iwl4965_calc_db_from_ratio(int sig_ratio)
3426 {
3427         /* 1000:1 or higher just report as 60 dB */
3428         if (sig_ratio >= 1000)
3429                 return 60;
3430
3431         /* 100:1 or higher, divide by 10 and use table,
3432          *   add 20 dB to make up for divide by 10 */
3433         if (sig_ratio >= 100)
3434                 return (20 + (int)ratio2dB[sig_ratio/10]);
3435
3436         /* We shouldn't see this */
3437         if (sig_ratio < 1)
3438                 return 0;
3439
3440         /* Use table for ratios 1:1 - 99:1 */
3441         return (int)ratio2dB[sig_ratio];
3442 }
3443
3444 #define PERFECT_RSSI (-20) /* dBm */
3445 #define WORST_RSSI (-95)   /* dBm */
3446 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3447
3448 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3449  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3450  *   about formulas used below. */
3451 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3452 {
3453         int sig_qual;
3454         int degradation = PERFECT_RSSI - rssi_dbm;
3455
3456         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3457          * as indicator; formula is (signal dbm - noise dbm).
3458          * SNR at or above 40 is a great signal (100%).
3459          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3460          * Weakest usable signal is usually 10 - 15 dB SNR. */
3461         if (noise_dbm) {
3462                 if (rssi_dbm - noise_dbm >= 40)
3463                         return 100;
3464                 else if (rssi_dbm < noise_dbm)
3465                         return 0;
3466                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3467
3468         /* Else use just the signal level.
3469          * This formula is a least squares fit of data points collected and
3470          *   compared with a reference system that had a percentage (%) display
3471          *   for signal quality. */
3472         } else
3473                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3474                             (15 * RSSI_RANGE + 62 * degradation)) /
3475                            (RSSI_RANGE * RSSI_RANGE);
3476
3477         if (sig_qual > 100)
3478                 sig_qual = 100;
3479         else if (sig_qual < 1)
3480                 sig_qual = 0;
3481
3482         return sig_qual;
3483 }
3484
3485 /**
3486  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3487  */
3488 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3489                                   struct iwl4965_tx_queue *txq)
3490 {
3491         u32 reg = 0;
3492         int rc = 0;
3493         int txq_id = txq->q.id;
3494
3495         if (txq->need_update == 0)
3496                 return rc;
3497
3498         /* if we're trying to save power */
3499         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3500                 /* wake up nic if it's powered down ...
3501                  * uCode will wake up, and interrupt us again, so next
3502                  * time we'll skip this part. */
3503                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3504
3505                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3506                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3507                         iwl_set_bit(priv, CSR_GP_CNTRL,
3508                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3509                         return rc;
3510                 }
3511
3512                 /* restore this queue's parameters in nic hardware. */
3513                 rc = iwl_grab_nic_access(priv);
3514                 if (rc)
3515                         return rc;
3516                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3517                                      txq->q.write_ptr | (txq_id << 8));
3518                 iwl_release_nic_access(priv);
3519
3520         /* else not in power-save mode, uCode will never sleep when we're
3521          * trying to tx (during RFKILL, we're not trying to tx). */
3522         } else
3523                 iwl_write32(priv, HBUS_TARG_WRPTR,
3524                             txq->q.write_ptr | (txq_id << 8));
3525
3526         txq->need_update = 0;
3527
3528         return rc;
3529 }
3530
3531 #ifdef CONFIG_IWLWIFI_DEBUG
3532 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
3533 {
3534         DECLARE_MAC_BUF(mac);
3535
3536         IWL_DEBUG_RADIO("RX CONFIG:\n");
3537         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3538         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3539         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3540         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3541                         le32_to_cpu(rxon->filter_flags));
3542         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3543         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3544                         rxon->ofdm_basic_rates);
3545         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3546         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3547                         print_mac(mac, rxon->node_addr));
3548         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3549                         print_mac(mac, rxon->bssid_addr));
3550         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3551 }
3552 #endif
3553
3554 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3555 {
3556         IWL_DEBUG_ISR("Enabling interrupts\n");
3557         set_bit(STATUS_INT_ENABLED, &priv->status);
3558         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3559 }
3560
3561 /* call this function to flush any scheduled tasklet */
3562 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3563 {
3564         /* wait to make sure we flush pedding tasklet*/
3565         synchronize_irq(priv->pci_dev->irq);
3566         tasklet_kill(&priv->irq_tasklet);
3567 }
3568
3569 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3570 {
3571         clear_bit(STATUS_INT_ENABLED, &priv->status);
3572
3573         /* disable interrupts from uCode/NIC to host */
3574         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3575
3576         /* acknowledge/clear/reset any interrupts still pending
3577          * from uCode or flow handler (Rx/Tx DMA) */
3578         iwl_write32(priv, CSR_INT, 0xffffffff);
3579         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3580         IWL_DEBUG_ISR("Disabled interrupts\n");
3581 }
3582
3583 static const char *desc_lookup(int i)
3584 {
3585         switch (i) {
3586         case 1:
3587                 return "FAIL";
3588         case 2:
3589                 return "BAD_PARAM";
3590         case 3:
3591                 return "BAD_CHECKSUM";
3592         case 4:
3593                 return "NMI_INTERRUPT";
3594         case 5:
3595                 return "SYSASSERT";
3596         case 6:
3597                 return "FATAL_ERROR";
3598         }
3599
3600         return "UNKNOWN";
3601 }
3602
3603 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3604 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3605
3606 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3607 {
3608         u32 data2, line;
3609         u32 desc, time, count, base, data1;
3610         u32 blink1, blink2, ilink1, ilink2;
3611         int rc;
3612
3613         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3614
3615         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3616                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3617                 return;
3618         }
3619
3620         rc = iwl_grab_nic_access(priv);
3621         if (rc) {
3622                 IWL_WARNING("Can not read from adapter at this time.\n");
3623                 return;
3624         }
3625
3626         count = iwl_read_targ_mem(priv, base);
3627
3628         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3629                 IWL_ERROR("Start IWL Error Log Dump:\n");
3630                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3631         }
3632
3633         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3634         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3635         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3636         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3637         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3638         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3639         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3640         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3641         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3642
3643         IWL_ERROR("Desc               Time       "
3644                   "data1      data2      line\n");
3645         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3646                   desc_lookup(desc), desc, time, data1, data2, line);
3647         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
3648         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3649                   ilink1, ilink2);
3650
3651         iwl_release_nic_access(priv);
3652 }
3653
3654 #define EVENT_START_OFFSET  (4 * sizeof(u32))
3655
3656 /**
3657  * iwl4965_print_event_log - Dump error event log to syslog
3658  *
3659  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
3660  */
3661 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
3662                                 u32 num_events, u32 mode)
3663 {
3664         u32 i;
3665         u32 base;       /* SRAM byte address of event log header */
3666         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
3667         u32 ptr;        /* SRAM byte address of log data */
3668         u32 ev, time, data; /* event log data */
3669
3670         if (num_events == 0)
3671                 return;
3672
3673         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3674
3675         if (mode == 0)
3676                 event_size = 2 * sizeof(u32);
3677         else
3678                 event_size = 3 * sizeof(u32);
3679
3680         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
3681
3682         /* "time" is actually "data" for mode 0 (no timestamp).
3683          * place event id # at far right for easier visual parsing. */
3684         for (i = 0; i < num_events; i++) {
3685                 ev = iwl_read_targ_mem(priv, ptr);
3686                 ptr += sizeof(u32);
3687                 time = iwl_read_targ_mem(priv, ptr);
3688                 ptr += sizeof(u32);
3689                 if (mode == 0)
3690                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
3691                 else {
3692                         data = iwl_read_targ_mem(priv, ptr);
3693                         ptr += sizeof(u32);
3694                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
3695                 }
3696         }
3697 }
3698
3699 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
3700 {
3701         int rc;
3702         u32 base;       /* SRAM byte address of event log header */
3703         u32 capacity;   /* event log capacity in # entries */
3704         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
3705         u32 num_wraps;  /* # times uCode wrapped to top of log */
3706         u32 next_entry; /* index of next entry to be written by uCode */
3707         u32 size;       /* # entries that we'll print */
3708
3709         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3710         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3711                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
3712                 return;
3713         }
3714
3715         rc = iwl_grab_nic_access(priv);
3716         if (rc) {
3717                 IWL_WARNING("Can not read from adapter at this time.\n");
3718                 return;
3719         }
3720
3721         /* event log header */
3722         capacity = iwl_read_targ_mem(priv, base);
3723         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
3724         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
3725         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
3726
3727         size = num_wraps ? capacity : next_entry;
3728
3729         /* bail out if nothing in log */
3730         if (size == 0) {
3731                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
3732                 iwl_release_nic_access(priv);
3733                 return;
3734         }
3735
3736         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
3737                   size, num_wraps);
3738
3739         /* if uCode has wrapped back to top of log, start at the oldest entry,
3740          * i.e the next one that uCode would fill. */
3741         if (num_wraps)
3742                 iwl4965_print_event_log(priv, next_entry,
3743                                     capacity - next_entry, mode);
3744
3745         /* (then/else) start at top of log */
3746         iwl4965_print_event_log(priv, 0, next_entry, mode);
3747
3748         iwl_release_nic_access(priv);
3749 }
3750
3751 /**
3752  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
3753  */
3754 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
3755 {
3756         /* Set the FW error flag -- cleared on iwl4965_down */
3757         set_bit(STATUS_FW_ERROR, &priv->status);
3758
3759         /* Cancel currently queued command. */
3760         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3761
3762 #ifdef CONFIG_IWLWIFI_DEBUG
3763         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
3764                 iwl4965_dump_nic_error_log(priv);
3765                 iwl4965_dump_nic_event_log(priv);
3766                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
3767         }
3768 #endif
3769
3770         wake_up_interruptible(&priv->wait_command_queue);
3771
3772         /* Keep the restart process from trying to send host
3773          * commands by clearing the INIT status bit */
3774         clear_bit(STATUS_READY, &priv->status);
3775
3776         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3777                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
3778                           "Restarting adapter due to uCode error.\n");
3779
3780                 if (iwl_is_associated(priv)) {
3781                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
3782                                sizeof(priv->recovery_rxon));
3783                         priv->error_recovering = 1;
3784                 }
3785                 queue_work(priv->workqueue, &priv->restart);
3786         }
3787 }
3788
3789 static void iwl4965_error_recovery(struct iwl_priv *priv)
3790 {
3791         unsigned long flags;
3792
3793         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
3794                sizeof(priv->staging_rxon));
3795         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3796         iwl4965_commit_rxon(priv);
3797
3798         iwl4965_rxon_add_station(priv, priv->bssid, 1);
3799
3800         spin_lock_irqsave(&priv->lock, flags);
3801         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
3802         priv->error_recovering = 0;
3803         spin_unlock_irqrestore(&priv->lock, flags);
3804 }
3805
3806 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
3807 {
3808         u32 inta, handled = 0;
3809         u32 inta_fh;
3810         unsigned long flags;
3811 #ifdef CONFIG_IWLWIFI_DEBUG
3812         u32 inta_mask;
3813 #endif
3814
3815         spin_lock_irqsave(&priv->lock, flags);
3816
3817         /* Ack/clear/reset pending uCode interrupts.
3818          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
3819          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
3820         inta = iwl_read32(priv, CSR_INT);
3821         iwl_write32(priv, CSR_INT, inta);
3822
3823         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
3824          * Any new interrupts that happen after this, either while we're
3825          * in this tasklet, or later, will show up in next ISR/tasklet. */
3826         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3827         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
3828
3829 #ifdef CONFIG_IWLWIFI_DEBUG
3830         if (iwl_debug_level & IWL_DL_ISR) {
3831                 /* just for debug */
3832                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3833                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3834                               inta, inta_mask, inta_fh);
3835         }
3836 #endif
3837
3838         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
3839          * atomic, make sure that inta covers all the interrupts that
3840          * we've discovered, even if FH interrupt came in just after
3841          * reading CSR_INT. */
3842         if (inta_fh & CSR49_FH_INT_RX_MASK)
3843                 inta |= CSR_INT_BIT_FH_RX;
3844         if (inta_fh & CSR49_FH_INT_TX_MASK)
3845                 inta |= CSR_INT_BIT_FH_TX;
3846
3847         /* Now service all interrupt bits discovered above. */
3848         if (inta & CSR_INT_BIT_HW_ERR) {
3849                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
3850
3851                 /* Tell the device to stop sending interrupts */
3852                 iwl4965_disable_interrupts(priv);
3853
3854                 iwl4965_irq_handle_error(priv);
3855
3856                 handled |= CSR_INT_BIT_HW_ERR;
3857
3858                 spin_unlock_irqrestore(&priv->lock, flags);
3859
3860                 return;
3861         }
3862
3863 #ifdef CONFIG_IWLWIFI_DEBUG
3864         if (iwl_debug_level & (IWL_DL_ISR)) {
3865                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
3866                 if (inta & CSR_INT_BIT_SCD)
3867                         IWL_DEBUG_ISR("Scheduler finished to transmit "
3868                                       "the frame/frames.\n");
3869
3870                 /* Alive notification via Rx interrupt will do the real work */
3871                 if (inta & CSR_INT_BIT_ALIVE)
3872                         IWL_DEBUG_ISR("Alive interrupt\n");
3873         }
3874 #endif
3875         /* Safely ignore these bits for debug checks below */
3876         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
3877
3878         /* HW RF KILL switch toggled */
3879         if (inta & CSR_INT_BIT_RF_KILL) {
3880                 int hw_rf_kill = 0;
3881                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
3882                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
3883                         hw_rf_kill = 1;
3884
3885                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
3886                                 "RF_KILL bit toggled to %s.\n",
3887                                 hw_rf_kill ? "disable radio":"enable radio");
3888
3889                 /* Queue restart only if RF_KILL switch was set to "kill"
3890                  *   when we loaded driver, and is now set to "enable".
3891                  * After we're Alive, RF_KILL gets handled by
3892                  *   iwl4965_rx_card_state_notif() */
3893                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
3894                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
3895                         queue_work(priv->workqueue, &priv->restart);
3896                 }
3897
3898                 handled |= CSR_INT_BIT_RF_KILL;
3899         }
3900
3901         /* Chip got too hot and stopped itself */
3902         if (inta & CSR_INT_BIT_CT_KILL) {
3903                 IWL_ERROR("Microcode CT kill error detected.\n");
3904                 handled |= CSR_INT_BIT_CT_KILL;
3905         }
3906
3907         /* Error detected by uCode */
3908         if (inta & CSR_INT_BIT_SW_ERR) {
3909                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
3910                           inta);
3911                 iwl4965_irq_handle_error(priv);
3912                 handled |= CSR_INT_BIT_SW_ERR;
3913         }
3914
3915         /* uCode wakes up after power-down sleep */
3916         if (inta & CSR_INT_BIT_WAKEUP) {
3917                 IWL_DEBUG_ISR("Wakeup interrupt\n");
3918                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
3919                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
3920                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
3921                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
3922                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
3923                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
3924                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
3925
3926                 handled |= CSR_INT_BIT_WAKEUP;
3927         }
3928
3929         /* All uCode command responses, including Tx command responses,
3930          * Rx "responses" (frame-received notification), and other
3931          * notifications from uCode come through here*/
3932         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
3933                 iwl_rx_handle(priv);
3934                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
3935         }
3936
3937         if (inta & CSR_INT_BIT_FH_TX) {
3938                 IWL_DEBUG_ISR("Tx interrupt\n");
3939                 handled |= CSR_INT_BIT_FH_TX;
3940         }
3941
3942         if (inta & ~handled)
3943                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
3944
3945         if (inta & ~CSR_INI_SET_MASK) {
3946                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
3947                          inta & ~CSR_INI_SET_MASK);
3948                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
3949         }
3950
3951         /* Re-enable all interrupts */
3952         /* only Re-enable if diabled by irq */
3953         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3954                 iwl4965_enable_interrupts(priv);
3955
3956 #ifdef CONFIG_IWLWIFI_DEBUG
3957         if (iwl_debug_level & (IWL_DL_ISR)) {
3958                 inta = iwl_read32(priv, CSR_INT);
3959                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3960                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3961                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
3962                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
3963         }
3964 #endif
3965         spin_unlock_irqrestore(&priv->lock, flags);
3966 }
3967
3968 static irqreturn_t iwl4965_isr(int irq, void *data)
3969 {
3970         struct iwl_priv *priv = data;
3971         u32 inta, inta_mask;
3972         u32 inta_fh;
3973         if (!priv)
3974                 return IRQ_NONE;
3975
3976         spin_lock(&priv->lock);
3977
3978         /* Disable (but don't clear!) interrupts here to avoid
3979          *    back-to-back ISRs and sporadic interrupts from our NIC.
3980          * If we have something to service, the tasklet will re-enable ints.
3981          * If we *don't* have something, we'll re-enable before leaving here. */
3982         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
3983         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3984
3985         /* Discover which interrupts are active/pending */
3986         inta = iwl_read32(priv, CSR_INT);
3987         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3988
3989         /* Ignore interrupt if there's nothing in NIC to service.
3990          * This may be due to IRQ shared with another device,
3991          * or due to sporadic interrupts thrown from our NIC. */
3992         if (!inta && !inta_fh) {
3993                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
3994                 goto none;
3995         }
3996
3997         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
3998                 /* Hardware disappeared. It might have already raised
3999                  * an interrupt */
4000                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4001                 goto unplugged;
4002         }
4003
4004         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4005                       inta, inta_mask, inta_fh);
4006
4007         inta &= ~CSR_INT_BIT_SCD;
4008
4009         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4010         if (likely(inta || inta_fh))
4011                 tasklet_schedule(&priv->irq_tasklet);
4012
4013  unplugged:
4014         spin_unlock(&priv->lock);
4015         return IRQ_HANDLED;
4016
4017  none:
4018         /* re-enable interrupts here since we don't have anything to service. */
4019         /* only Re-enable if diabled by irq */
4020         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4021                 iwl4965_enable_interrupts(priv);
4022         spin_unlock(&priv->lock);
4023         return IRQ_NONE;
4024 }
4025
4026 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4027  * sending probe req.  This should be set long enough to hear probe responses
4028  * from more than one AP.  */
4029 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4030 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4031
4032 /* For faster active scanning, scan will move to the next channel if fewer than
4033  * PLCP_QUIET_THRESH packets are heard on this channel within
4034  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4035  * time if it's a quiet channel (nothing responded to our probe, and there's
4036  * no other traffic).
4037  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4038 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4039 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4040
4041 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4042  * Must be set longer than active dwell time.
4043  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4044 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4045 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4046 #define IWL_PASSIVE_DWELL_BASE      (100)
4047 #define IWL_CHANNEL_TUNE_TIME       5
4048
4049 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4050                                                 enum ieee80211_band band)
4051 {
4052         if (band == IEEE80211_BAND_5GHZ)
4053                 return IWL_ACTIVE_DWELL_TIME_52;
4054         else
4055                 return IWL_ACTIVE_DWELL_TIME_24;
4056 }
4057
4058 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4059                                           enum ieee80211_band band)
4060 {
4061         u16 active = iwl4965_get_active_dwell_time(priv, band);
4062         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4063             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4064             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4065
4066         if (iwl_is_associated(priv)) {
4067                 /* If we're associated, we clamp the maximum passive
4068                  * dwell time to be 98% of the beacon interval (minus
4069                  * 2 * channel tune time) */
4070                 passive = priv->beacon_int;
4071                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4072                         passive = IWL_PASSIVE_DWELL_BASE;
4073                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4074         }
4075
4076         if (passive <= active)
4077                 passive = active + 1;
4078
4079         return passive;
4080 }
4081
4082 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4083                                          enum ieee80211_band band,
4084                                      u8 is_active, u8 direct_mask,
4085                                      struct iwl4965_scan_channel *scan_ch)
4086 {
4087         const struct ieee80211_channel *channels = NULL;
4088         const struct ieee80211_supported_band *sband;
4089         const struct iwl_channel_info *ch_info;
4090         u16 passive_dwell = 0;
4091         u16 active_dwell = 0;
4092         int added, i;
4093
4094         sband = iwl_get_hw_mode(priv, band);
4095         if (!sband)
4096                 return 0;
4097
4098         channels = sband->channels;
4099
4100         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4101         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4102
4103         for (i = 0, added = 0; i < sband->n_channels; i++) {
4104                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4105                         continue;
4106
4107                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4108
4109                 ch_info = iwl_get_channel_info(priv, band,
4110                                          scan_ch->channel);
4111                 if (!is_channel_valid(ch_info)) {
4112                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4113                                        scan_ch->channel);
4114                         continue;
4115                 }
4116
4117                 if (!is_active || is_channel_passive(ch_info) ||
4118                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4119                         scan_ch->type = 0;      /* passive */
4120                 else
4121                         scan_ch->type = 1;      /* active */
4122
4123                 if (scan_ch->type & 1)
4124                         scan_ch->type |= (direct_mask << 1);
4125
4126                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4127                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4128
4129                 /* Set txpower levels to defaults */
4130                 scan_ch->tpc.dsp_atten = 110;
4131                 /* scan_pwr_info->tpc.dsp_atten; */
4132
4133                 /*scan_pwr_info->tpc.tx_gain; */
4134                 if (band == IEEE80211_BAND_5GHZ)
4135                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4136                 else {
4137                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4138                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4139                          * power level:
4140                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4141                          */
4142                 }
4143
4144                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4145                                scan_ch->channel,
4146                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4147                                (scan_ch->type & 1) ?
4148                                active_dwell : passive_dwell);
4149
4150                 scan_ch++;
4151                 added++;
4152         }
4153
4154         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4155         return added;
4156 }
4157
4158 /******************************************************************************
4159  *
4160  * uCode download functions
4161  *
4162  ******************************************************************************/
4163
4164 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4165 {
4166         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4167         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4168         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4169         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4170         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4171         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4172 }
4173
4174 static void iwl4965_nic_start(struct iwl_priv *priv)
4175 {
4176         /* Remove all resets to allow NIC to operate */
4177         iwl_write32(priv, CSR_RESET, 0);
4178 }
4179
4180
4181 /**
4182  * iwl4965_read_ucode - Read uCode images from disk file.
4183  *
4184  * Copy into buffers for card to fetch via bus-mastering
4185  */
4186 static int iwl4965_read_ucode(struct iwl_priv *priv)
4187 {
4188         struct iwl4965_ucode *ucode;
4189         int ret;
4190         const struct firmware *ucode_raw;
4191         const char *name = priv->cfg->fw_name;
4192         u8 *src;
4193         size_t len;
4194         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4195
4196         /* Ask kernel firmware_class module to get the boot firmware off disk.
4197          * request_firmware() is synchronous, file is in memory on return. */
4198         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4199         if (ret < 0) {
4200                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4201                                         name, ret);
4202                 goto error;
4203         }
4204
4205         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4206                        name, ucode_raw->size);
4207
4208         /* Make sure that we got at least our header! */
4209         if (ucode_raw->size < sizeof(*ucode)) {
4210                 IWL_ERROR("File size way too small!\n");
4211                 ret = -EINVAL;
4212                 goto err_release;
4213         }
4214
4215         /* Data from ucode file:  header followed by uCode images */
4216         ucode = (void *)ucode_raw->data;
4217
4218         ver = le32_to_cpu(ucode->ver);
4219         inst_size = le32_to_cpu(ucode->inst_size);
4220         data_size = le32_to_cpu(ucode->data_size);
4221         init_size = le32_to_cpu(ucode->init_size);
4222         init_data_size = le32_to_cpu(ucode->init_data_size);
4223         boot_size = le32_to_cpu(ucode->boot_size);
4224
4225         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4226         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4227                        inst_size);
4228         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4229                        data_size);
4230         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4231                        init_size);
4232         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4233                        init_data_size);
4234         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4235                        boot_size);
4236
4237         /* Verify size of file vs. image size info in file's header */
4238         if (ucode_raw->size < sizeof(*ucode) +
4239                 inst_size + data_size + init_size +
4240                 init_data_size + boot_size) {
4241
4242                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4243                                (int)ucode_raw->size);
4244                 ret = -EINVAL;
4245                 goto err_release;
4246         }
4247
4248         /* Verify that uCode images will fit in card's SRAM */
4249         if (inst_size > priv->hw_params.max_inst_size) {
4250                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4251                                inst_size);
4252                 ret = -EINVAL;
4253                 goto err_release;
4254         }
4255
4256         if (data_size > priv->hw_params.max_data_size) {
4257                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4258                                 data_size);
4259                 ret = -EINVAL;
4260                 goto err_release;
4261         }
4262         if (init_size > priv->hw_params.max_inst_size) {
4263                 IWL_DEBUG_INFO
4264                     ("uCode init instr len %d too large to fit in\n",
4265                       init_size);
4266                 ret = -EINVAL;
4267                 goto err_release;
4268         }
4269         if (init_data_size > priv->hw_params.max_data_size) {
4270                 IWL_DEBUG_INFO
4271                     ("uCode init data len %d too large to fit in\n",
4272                       init_data_size);
4273                 ret = -EINVAL;
4274                 goto err_release;
4275         }
4276         if (boot_size > priv->hw_params.max_bsm_size) {
4277                 IWL_DEBUG_INFO
4278                     ("uCode boot instr len %d too large to fit in\n",
4279                       boot_size);
4280                 ret = -EINVAL;
4281                 goto err_release;
4282         }
4283
4284         /* Allocate ucode buffers for card's bus-master loading ... */
4285
4286         /* Runtime instructions and 2 copies of data:
4287          * 1) unmodified from disk
4288          * 2) backup cache for save/restore during power-downs */
4289         priv->ucode_code.len = inst_size;
4290         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4291
4292         priv->ucode_data.len = data_size;
4293         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4294
4295         priv->ucode_data_backup.len = data_size;
4296         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4297
4298         /* Initialization instructions and data */
4299         if (init_size && init_data_size) {
4300                 priv->ucode_init.len = init_size;
4301                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4302
4303                 priv->ucode_init_data.len = init_data_size;
4304                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4305
4306                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4307                         goto err_pci_alloc;
4308         }
4309
4310         /* Bootstrap (instructions only, no data) */
4311         if (boot_size) {
4312                 priv->ucode_boot.len = boot_size;
4313                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4314
4315                 if (!priv->ucode_boot.v_addr)
4316                         goto err_pci_alloc;
4317         }
4318
4319         /* Copy images into buffers for card's bus-master reads ... */
4320
4321         /* Runtime instructions (first block of data in file) */
4322         src = &ucode->data[0];
4323         len = priv->ucode_code.len;
4324         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4325         memcpy(priv->ucode_code.v_addr, src, len);
4326         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4327                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4328
4329         /* Runtime data (2nd block)
4330          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
4331         src = &ucode->data[inst_size];
4332         len = priv->ucode_data.len;
4333         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4334         memcpy(priv->ucode_data.v_addr, src, len);
4335         memcpy(priv->ucode_data_backup.v_addr, src, len);
4336
4337         /* Initialization instructions (3rd block) */
4338         if (init_size) {
4339                 src = &ucode->data[inst_size + data_size];
4340                 len = priv->ucode_init.len;
4341                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4342                                 len);
4343                 memcpy(priv->ucode_init.v_addr, src, len);
4344         }
4345
4346         /* Initialization data (4th block) */
4347         if (init_data_size) {
4348                 src = &ucode->data[inst_size + data_size + init_size];
4349                 len = priv->ucode_init_data.len;
4350                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4351                                len);
4352                 memcpy(priv->ucode_init_data.v_addr, src, len);
4353         }
4354
4355         /* Bootstrap instructions (5th block) */
4356         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4357         len = priv->ucode_boot.len;
4358         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4359         memcpy(priv->ucode_boot.v_addr, src, len);
4360
4361         /* We have our copies now, allow OS release its copies */
4362         release_firmware(ucode_raw);
4363         return 0;
4364
4365  err_pci_alloc:
4366         IWL_ERROR("failed to allocate pci memory\n");
4367         ret = -ENOMEM;
4368         iwl4965_dealloc_ucode_pci(priv);
4369
4370  err_release:
4371         release_firmware(ucode_raw);
4372
4373  error:
4374         return ret;
4375 }
4376
4377
4378 /**
4379  * iwl4965_set_ucode_ptrs - Set uCode address location
4380  *
4381  * Tell initialization uCode where to find runtime uCode.
4382  *
4383  * BSM registers initially contain pointers to initialization uCode.
4384  * We need to replace them to load runtime uCode inst and data,
4385  * and to save runtime data when powering down.
4386  */
4387 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
4388 {
4389         dma_addr_t pinst;
4390         dma_addr_t pdata;
4391         int rc = 0;
4392         unsigned long flags;
4393
4394         /* bits 35:4 for 4965 */
4395         pinst = priv->ucode_code.p_addr >> 4;
4396         pdata = priv->ucode_data_backup.p_addr >> 4;
4397
4398         spin_lock_irqsave(&priv->lock, flags);
4399         rc = iwl_grab_nic_access(priv);
4400         if (rc) {
4401                 spin_unlock_irqrestore(&priv->lock, flags);
4402                 return rc;
4403         }
4404
4405         /* Tell bootstrap uCode where to find image to load */
4406         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4407         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4408         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4409                                  priv->ucode_data.len);
4410
4411         /* Inst bytecount must be last to set up, bit 31 signals uCode
4412          *   that all new ptr/size info is in place */
4413         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4414                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4415
4416         iwl_release_nic_access(priv);
4417
4418         spin_unlock_irqrestore(&priv->lock, flags);
4419
4420         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4421
4422         return rc;
4423 }
4424
4425 /**
4426  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
4427  *
4428  * Called after REPLY_ALIVE notification received from "initialize" uCode.
4429  *
4430  * The 4965 "initialize" ALIVE reply contains calibration data for:
4431  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
4432  *   (3945 does not contain this data).
4433  *
4434  * Tell "initialize" uCode to go ahead and load the runtime uCode.
4435 */
4436 static void iwl4965_init_alive_start(struct iwl_priv *priv)
4437 {
4438         /* Check alive response for "valid" sign from uCode */
4439         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
4440                 /* We had an error bringing up the hardware, so take it
4441                  * all the way back down so we can try again */
4442                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
4443                 goto restart;
4444         }
4445
4446         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
4447          * This is a paranoid check, because we would not have gotten the
4448          * "initialize" alive if code weren't properly loaded.  */
4449         if (iwl_verify_ucode(priv)) {
4450                 /* Runtime instruction load was bad;
4451                  * take it all the way back down so we can try again */
4452                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
4453                 goto restart;
4454         }
4455
4456         /* Calculate temperature */
4457         priv->temperature = iwl4965_get_temperature(priv);
4458
4459         /* Send pointers to protocol/runtime uCode image ... init code will
4460          * load and launch runtime uCode, which will send us another "Alive"
4461          * notification. */
4462         IWL_DEBUG_INFO("Initialization Alive received.\n");
4463         if (iwl4965_set_ucode_ptrs(priv)) {
4464                 /* Runtime instruction load won't happen;
4465                  * take it all the way back down so we can try again */
4466                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
4467                 goto restart;
4468         }
4469         return;
4470
4471  restart:
4472         queue_work(priv->workqueue, &priv->restart);
4473 }
4474
4475
4476 /**
4477  * iwl4965_alive_start - called after REPLY_ALIVE notification received
4478  *                   from protocol/runtime uCode (initialization uCode's
4479  *                   Alive gets handled by iwl4965_init_alive_start()).
4480  */
4481 static void iwl4965_alive_start(struct iwl_priv *priv)
4482 {
4483         int ret = 0;
4484
4485         IWL_DEBUG_INFO("Runtime Alive received.\n");
4486
4487         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
4488                 /* We had an error bringing up the hardware, so take it
4489                  * all the way back down so we can try again */
4490                 IWL_DEBUG_INFO("Alive failed.\n");
4491                 goto restart;
4492         }
4493
4494         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
4495          * This is a paranoid check, because we would not have gotten the
4496          * "runtime" alive if code weren't properly loaded.  */
4497         if (iwl_verify_ucode(priv)) {
4498                 /* Runtime instruction load was bad;
4499                  * take it all the way back down so we can try again */
4500                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
4501                 goto restart;
4502         }
4503
4504         iwlcore_clear_stations_table(priv);
4505
4506         ret = priv->cfg->ops->lib->alive_notify(priv);
4507         if (ret) {
4508                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
4509                             ret);
4510                 goto restart;
4511         }
4512
4513         /* After the ALIVE response, we can send host commands to 4965 uCode */
4514         set_bit(STATUS_ALIVE, &priv->status);
4515
4516         /* Clear out the uCode error bit if it is set */
4517         clear_bit(STATUS_FW_ERROR, &priv->status);
4518
4519         if (iwl_is_rfkill(priv))
4520                 return;
4521
4522         ieee80211_start_queues(priv->hw);
4523
4524         priv->active_rate = priv->rates_mask;
4525         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
4526
4527         if (iwl_is_associated(priv)) {
4528                 struct iwl4965_rxon_cmd *active_rxon =
4529                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
4530
4531                 memcpy(&priv->staging_rxon, &priv->active_rxon,
4532                        sizeof(priv->staging_rxon));
4533                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4534         } else {
4535                 /* Initialize our rx_config data */
4536                 iwl4965_connection_init_rx_config(priv);
4537                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
4538         }
4539
4540         /* Configure Bluetooth device coexistence support */
4541         iwl4965_send_bt_config(priv);
4542
4543         /* Configure the adapter for unassociated operation */
4544         iwl4965_commit_rxon(priv);
4545
4546         /* At this point, the NIC is initialized and operational */
4547         priv->notif_missed_beacons = 0;
4548
4549         iwl4965_rf_kill_ct_config(priv);
4550
4551         iwl_leds_register(priv);
4552
4553         IWL_DEBUG_INFO("ALIVE processing complete.\n");
4554         set_bit(STATUS_READY, &priv->status);
4555         wake_up_interruptible(&priv->wait_command_queue);
4556
4557         if (priv->error_recovering)
4558                 iwl4965_error_recovery(priv);
4559
4560         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
4561         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
4562         return;
4563
4564  restart:
4565         queue_work(priv->workqueue, &priv->restart);
4566 }
4567
4568 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
4569
4570 static void __iwl4965_down(struct iwl_priv *priv)
4571 {
4572         unsigned long flags;
4573         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
4574         struct ieee80211_conf *conf = NULL;
4575
4576         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
4577
4578         conf = ieee80211_get_hw_conf(priv->hw);
4579
4580         if (!exit_pending)
4581                 set_bit(STATUS_EXIT_PENDING, &priv->status);
4582
4583         iwl_leds_unregister(priv);
4584
4585         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
4586
4587         iwlcore_clear_stations_table(priv);
4588
4589         /* Unblock any waiting calls */
4590         wake_up_interruptible_all(&priv->wait_command_queue);
4591
4592         /* Wipe out the EXIT_PENDING status bit if we are not actually
4593          * exiting the module */
4594         if (!exit_pending)
4595                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
4596
4597         /* stop and reset the on-board processor */
4598         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4599
4600         /* tell the device to stop sending interrupts */
4601         spin_lock_irqsave(&priv->lock, flags);
4602         iwl4965_disable_interrupts(priv);
4603         spin_unlock_irqrestore(&priv->lock, flags);
4604         iwl_synchronize_irq(priv);
4605
4606         if (priv->mac80211_registered)
4607                 ieee80211_stop_queues(priv->hw);
4608
4609         /* If we have not previously called iwl4965_init() then
4610          * clear all bits but the RF Kill and SUSPEND bits and return */
4611         if (!iwl_is_init(priv)) {
4612                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4613                                         STATUS_RF_KILL_HW |
4614                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4615                                         STATUS_RF_KILL_SW |
4616                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4617                                         STATUS_GEO_CONFIGURED |
4618                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4619                                         STATUS_IN_SUSPEND;
4620                 goto exit;
4621         }
4622
4623         /* ...otherwise clear out all the status bits but the RF Kill and
4624          * SUSPEND bits and continue taking the NIC down. */
4625         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4626                                 STATUS_RF_KILL_HW |
4627                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4628                                 STATUS_RF_KILL_SW |
4629                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4630                                 STATUS_GEO_CONFIGURED |
4631                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4632                                 STATUS_IN_SUSPEND |
4633                         test_bit(STATUS_FW_ERROR, &priv->status) <<
4634                                 STATUS_FW_ERROR;
4635
4636         spin_lock_irqsave(&priv->lock, flags);
4637         iwl_clear_bit(priv, CSR_GP_CNTRL,
4638                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4639         spin_unlock_irqrestore(&priv->lock, flags);
4640
4641         iwl4965_hw_txq_ctx_stop(priv);
4642         iwl4965_hw_rxq_stop(priv);
4643
4644         spin_lock_irqsave(&priv->lock, flags);
4645         if (!iwl_grab_nic_access(priv)) {
4646                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
4647                                          APMG_CLK_VAL_DMA_CLK_RQT);
4648                 iwl_release_nic_access(priv);
4649         }
4650         spin_unlock_irqrestore(&priv->lock, flags);
4651
4652         udelay(5);
4653
4654         iwl4965_hw_nic_stop_master(priv);
4655         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4656         iwl4965_hw_nic_reset(priv);
4657         priv->cfg->ops->lib->free_shared_mem(priv);
4658
4659  exit:
4660         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
4661
4662         if (priv->ibss_beacon)
4663                 dev_kfree_skb(priv->ibss_beacon);
4664         priv->ibss_beacon = NULL;
4665
4666         /* clear out any free frames */
4667         iwl4965_clear_free_frames(priv);
4668 }
4669
4670 static void iwl4965_down(struct iwl_priv *priv)
4671 {
4672         mutex_lock(&priv->mutex);
4673         __iwl4965_down(priv);
4674         mutex_unlock(&priv->mutex);
4675
4676         iwl4965_cancel_deferred_work(priv);
4677 }
4678
4679 #define MAX_HW_RESTARTS 5
4680
4681 static int __iwl4965_up(struct iwl_priv *priv)
4682 {
4683         int i;
4684         int ret;
4685
4686         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4687                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
4688                 return -EIO;
4689         }
4690
4691         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
4692                 IWL_WARNING("Radio disabled by SW RF kill (module "
4693                             "parameter)\n");
4694                 iwl_rfkill_set_hw_state(priv);
4695                 return -ENODEV;
4696         }
4697
4698         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
4699                 IWL_ERROR("ucode not available for device bringup\n");
4700                 return -EIO;
4701         }
4702
4703         /* If platform's RF_KILL switch is NOT set to KILL */
4704         if (iwl_read32(priv, CSR_GP_CNTRL) &
4705                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
4706                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4707         else {
4708                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4709                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
4710                         iwl_rfkill_set_hw_state(priv);
4711                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
4712                         return -ENODEV;
4713                 }
4714         }
4715
4716         iwl_rfkill_set_hw_state(priv);
4717         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
4718
4719         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
4720         if (ret) {
4721                 IWL_ERROR("Unable to allocate shared memory\n");
4722                 return ret;
4723         }
4724
4725         ret = priv->cfg->ops->lib->hw_nic_init(priv);
4726         if (ret) {
4727                 IWL_ERROR("Unable to init nic\n");
4728                 return ret;
4729         }
4730
4731         /* make sure rfkill handshake bits are cleared */
4732         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4733         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4734                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4735
4736         /* clear (again), then enable host interrupts */
4737         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
4738         iwl4965_enable_interrupts(priv);
4739
4740         /* really make sure rfkill handshake bits are cleared */
4741         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4742         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4743
4744         /* Copy original ucode data image from disk into backup cache.
4745          * This will be used to initialize the on-board processor's
4746          * data SRAM for a clean start when the runtime program first loads. */
4747         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
4748                priv->ucode_data.len);
4749
4750         /* We return success when we resume from suspend and rf_kill is on. */
4751         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
4752                 return 0;
4753
4754         for (i = 0; i < MAX_HW_RESTARTS; i++) {
4755
4756                 iwlcore_clear_stations_table(priv);
4757
4758                 /* load bootstrap state machine,
4759                  * load bootstrap program into processor's memory,
4760                  * prepare to load the "initialize" uCode */
4761                 ret = priv->cfg->ops->lib->load_ucode(priv);
4762
4763                 if (ret) {
4764                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
4765                         continue;
4766                 }
4767
4768                 /* start card; "initialize" will load runtime ucode */
4769                 iwl4965_nic_start(priv);
4770
4771                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
4772
4773                 return 0;
4774         }
4775
4776         set_bit(STATUS_EXIT_PENDING, &priv->status);
4777         __iwl4965_down(priv);
4778
4779         /* tried to restart and config the device for as long as our
4780          * patience could withstand */
4781         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
4782         return -EIO;
4783 }
4784
4785
4786 /*****************************************************************************
4787  *
4788  * Workqueue callbacks
4789  *
4790  *****************************************************************************/
4791
4792 static void iwl4965_bg_init_alive_start(struct work_struct *data)
4793 {
4794         struct iwl_priv *priv =
4795             container_of(data, struct iwl_priv, init_alive_start.work);
4796
4797         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4798                 return;
4799
4800         mutex_lock(&priv->mutex);
4801         iwl4965_init_alive_start(priv);
4802         mutex_unlock(&priv->mutex);
4803 }
4804
4805 static void iwl4965_bg_alive_start(struct work_struct *data)
4806 {
4807         struct iwl_priv *priv =
4808             container_of(data, struct iwl_priv, alive_start.work);
4809
4810         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4811                 return;
4812
4813         mutex_lock(&priv->mutex);
4814         iwl4965_alive_start(priv);
4815         mutex_unlock(&priv->mutex);
4816 }
4817
4818 static void iwl4965_bg_rf_kill(struct work_struct *work)
4819 {
4820         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
4821
4822         wake_up_interruptible(&priv->wait_command_queue);
4823
4824         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4825                 return;
4826
4827         mutex_lock(&priv->mutex);
4828
4829         if (!iwl_is_rfkill(priv)) {
4830                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
4831                           "HW and/or SW RF Kill no longer active, restarting "
4832                           "device\n");
4833                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
4834                         queue_work(priv->workqueue, &priv->restart);
4835         } else {
4836                 /* make sure mac80211 stop sending Tx frame */
4837                 if (priv->mac80211_registered)
4838                         ieee80211_stop_queues(priv->hw);
4839
4840                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
4841                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
4842                                           "disabled by SW switch\n");
4843                 else
4844                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
4845                                     "Kill switch must be turned off for "
4846                                     "wireless networking to work.\n");
4847         }
4848         iwl_rfkill_set_hw_state(priv);
4849
4850         mutex_unlock(&priv->mutex);
4851 }
4852
4853 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
4854
4855 static void iwl4965_bg_scan_check(struct work_struct *data)
4856 {
4857         struct iwl_priv *priv =
4858             container_of(data, struct iwl_priv, scan_check.work);
4859
4860         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4861                 return;
4862
4863         mutex_lock(&priv->mutex);
4864         if (test_bit(STATUS_SCANNING, &priv->status) ||
4865             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4866                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
4867                           "Scan completion watchdog resetting adapter (%dms)\n",
4868                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
4869
4870                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
4871                         iwl4965_send_scan_abort(priv);
4872         }
4873         mutex_unlock(&priv->mutex);
4874 }
4875
4876 static void iwl4965_bg_request_scan(struct work_struct *data)
4877 {
4878         struct iwl_priv *priv =
4879             container_of(data, struct iwl_priv, request_scan);
4880         struct iwl_host_cmd cmd = {
4881                 .id = REPLY_SCAN_CMD,
4882                 .len = sizeof(struct iwl4965_scan_cmd),
4883                 .meta.flags = CMD_SIZE_HUGE,
4884         };
4885         struct iwl4965_scan_cmd *scan;
4886         struct ieee80211_conf *conf = NULL;
4887         u16 cmd_len;
4888         enum ieee80211_band band;
4889         u8 direct_mask;
4890         int ret = 0;
4891
4892         conf = ieee80211_get_hw_conf(priv->hw);
4893
4894         mutex_lock(&priv->mutex);
4895
4896         if (!iwl_is_ready(priv)) {
4897                 IWL_WARNING("request scan called when driver not ready.\n");
4898                 goto done;
4899         }
4900
4901         /* Make sure the scan wasn't cancelled before this queued work
4902          * was given the chance to run... */
4903         if (!test_bit(STATUS_SCANNING, &priv->status))
4904                 goto done;
4905
4906         /* This should never be called or scheduled if there is currently
4907          * a scan active in the hardware. */
4908         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
4909                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
4910                                "Ignoring second request.\n");
4911                 ret = -EIO;
4912                 goto done;
4913         }
4914
4915         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4916                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
4917                 goto done;
4918         }
4919
4920         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4921                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
4922                 goto done;
4923         }
4924
4925         if (iwl_is_rfkill(priv)) {
4926                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
4927                 goto done;
4928         }
4929
4930         if (!test_bit(STATUS_READY, &priv->status)) {
4931                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
4932                 goto done;
4933         }
4934
4935         if (!priv->scan_bands) {
4936                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
4937                 goto done;
4938         }
4939
4940         if (!priv->scan) {
4941                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
4942                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
4943                 if (!priv->scan) {
4944                         ret = -ENOMEM;
4945                         goto done;
4946                 }
4947         }
4948         scan = priv->scan;
4949         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
4950
4951         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
4952         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
4953
4954         if (iwl_is_associated(priv)) {
4955                 u16 interval = 0;
4956                 u32 extra;
4957                 u32 suspend_time = 100;
4958                 u32 scan_suspend_time = 100;
4959                 unsigned long flags;
4960
4961                 IWL_DEBUG_INFO("Scanning while associated...\n");
4962
4963                 spin_lock_irqsave(&priv->lock, flags);
4964                 interval = priv->beacon_int;
4965                 spin_unlock_irqrestore(&priv->lock, flags);
4966
4967                 scan->suspend_time = 0;
4968                 scan->max_out_time = cpu_to_le32(200 * 1024);
4969                 if (!interval)
4970                         interval = suspend_time;
4971
4972                 extra = (suspend_time / interval) << 22;
4973                 scan_suspend_time = (extra |
4974                     ((suspend_time % interval) * 1024));
4975                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
4976                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
4977                                scan_suspend_time, interval);
4978         }
4979
4980         /* We should add the ability for user to lock to PASSIVE ONLY */
4981         if (priv->one_direct_scan) {
4982                 IWL_DEBUG_SCAN
4983                     ("Kicking off one direct scan for '%s'\n",
4984                      iwl4965_escape_essid(priv->direct_ssid,
4985                                       priv->direct_ssid_len));
4986                 scan->direct_scan[0].id = WLAN_EID_SSID;
4987                 scan->direct_scan[0].len = priv->direct_ssid_len;
4988                 memcpy(scan->direct_scan[0].ssid,
4989                        priv->direct_ssid, priv->direct_ssid_len);
4990                 direct_mask = 1;
4991         } else if (!iwl_is_associated(priv) && priv->essid_len) {
4992                 IWL_DEBUG_SCAN
4993                   ("Kicking off one direct scan for '%s' when not associated\n",
4994                    iwl4965_escape_essid(priv->essid, priv->essid_len));
4995                 scan->direct_scan[0].id = WLAN_EID_SSID;
4996                 scan->direct_scan[0].len = priv->essid_len;
4997                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
4998                 direct_mask = 1;
4999         } else {
5000                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5001                 direct_mask = 0;
5002         }
5003
5004         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5005         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5006         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5007
5008
5009         switch (priv->scan_bands) {
5010         case 2:
5011                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5012                 scan->tx_cmd.rate_n_flags =
5013                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5014                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5015
5016                 scan->good_CRC_th = 0;
5017                 band = IEEE80211_BAND_2GHZ;
5018                 break;
5019
5020         case 1:
5021                 scan->tx_cmd.rate_n_flags =
5022                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5023                                 RATE_MCS_ANT_B_MSK);
5024                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5025                 band = IEEE80211_BAND_5GHZ;
5026                 break;
5027
5028         default:
5029                 IWL_WARNING("Invalid scan band count\n");
5030                 goto done;
5031         }
5032
5033         /* We don't build a direct scan probe request; the uCode will do
5034          * that based on the direct_mask added to each channel entry */
5035         cmd_len = iwl4965_fill_probe_req(priv, band,
5036                                         (struct ieee80211_mgmt *)scan->data,
5037                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5038
5039         scan->tx_cmd.len = cpu_to_le16(cmd_len);
5040         /* select Rx chains */
5041
5042         /* Force use of chains B and C (0x6) for scan Rx.
5043          * Avoid A (0x1) because of its off-channel reception on A-band.
5044          * MIMO is not used here, but value is required to make uCode happy. */
5045         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5046                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5047                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5048                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5049
5050         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5051                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5052
5053         if (direct_mask)
5054                 scan->channel_count =
5055                         iwl4965_get_channels_for_scan(
5056                                 priv, band, 1, /* active */
5057                                 direct_mask,
5058                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5059         else
5060                 scan->channel_count =
5061                         iwl4965_get_channels_for_scan(
5062                                 priv, band, 0, /* passive */
5063                                 direct_mask,
5064                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5065
5066         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5067                                RXON_FILTER_BCON_AWARE_MSK);
5068         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5069             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5070         cmd.data = scan;
5071         scan->len = cpu_to_le16(cmd.len);
5072
5073         set_bit(STATUS_SCAN_HW, &priv->status);
5074         ret = iwl_send_cmd_sync(priv, &cmd);
5075         if (ret)
5076                 goto done;
5077
5078         queue_delayed_work(priv->workqueue, &priv->scan_check,
5079                            IWL_SCAN_CHECK_WATCHDOG);
5080
5081         mutex_unlock(&priv->mutex);
5082         return;
5083
5084  done:
5085         /* inform mac80211 scan aborted */
5086         queue_work(priv->workqueue, &priv->scan_completed);
5087         mutex_unlock(&priv->mutex);
5088 }
5089
5090 static void iwl4965_bg_up(struct work_struct *data)
5091 {
5092         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5093
5094         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5095                 return;
5096
5097         mutex_lock(&priv->mutex);
5098         __iwl4965_up(priv);
5099         mutex_unlock(&priv->mutex);
5100 }
5101
5102 static void iwl4965_bg_restart(struct work_struct *data)
5103 {
5104         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5105
5106         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5107                 return;
5108
5109         iwl4965_down(priv);
5110         queue_work(priv->workqueue, &priv->up);
5111 }
5112
5113 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5114 {
5115         struct iwl_priv *priv =
5116             container_of(data, struct iwl_priv, rx_replenish);
5117
5118         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5119                 return;
5120
5121         mutex_lock(&priv->mutex);
5122         iwl_rx_replenish(priv);
5123         mutex_unlock(&priv->mutex);
5124 }
5125
5126 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5127
5128 static void iwl4965_post_associate(struct iwl_priv *priv)
5129 {
5130         struct ieee80211_conf *conf = NULL;
5131         int ret = 0;
5132         DECLARE_MAC_BUF(mac);
5133
5134         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5135                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5136                 return;
5137         }
5138
5139         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5140                         priv->assoc_id,
5141                         print_mac(mac, priv->active_rxon.bssid_addr));
5142
5143
5144         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5145                 return;
5146
5147
5148         if (!priv->vif || !priv->is_open)
5149                 return;
5150
5151         iwl4965_scan_cancel_timeout(priv, 200);
5152
5153         conf = ieee80211_get_hw_conf(priv->hw);
5154
5155         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5156         iwl4965_commit_rxon(priv);
5157
5158         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5159         iwl4965_setup_rxon_timing(priv);
5160         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5161                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5162         if (ret)
5163                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5164                             "Attempting to continue.\n");
5165
5166         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5167
5168 #ifdef CONFIG_IWL4965_HT
5169         if (priv->current_ht_config.is_ht)
5170                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5171 #endif /* CONFIG_IWL4965_HT*/
5172         iwl_set_rxon_chain(priv);
5173         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5174
5175         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5176                         priv->assoc_id, priv->beacon_int);
5177
5178         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5179                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5180         else
5181                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5182
5183         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5184                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5185                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5186                 else
5187                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5188
5189                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5190                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5191
5192         }
5193
5194         iwl4965_commit_rxon(priv);
5195
5196         switch (priv->iw_mode) {
5197         case IEEE80211_IF_TYPE_STA:
5198                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5199                 break;
5200
5201         case IEEE80211_IF_TYPE_IBSS:
5202
5203                 /* clear out the station table */
5204                 iwlcore_clear_stations_table(priv);
5205
5206                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5207                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5208                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5209                 iwl4965_send_beacon_cmd(priv);
5210
5211                 break;
5212
5213         default:
5214                 IWL_ERROR("%s Should not be called in %d mode\n",
5215                                 __FUNCTION__, priv->iw_mode);
5216                 break;
5217         }
5218
5219         iwl4965_sequence_reset(priv);
5220
5221         /* Enable Rx differential gain and sensitivity calibrations */
5222         iwl_chain_noise_reset(priv);
5223         priv->start_calib = 1;
5224
5225         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5226                 priv->assoc_station_added = 1;
5227
5228         iwl4965_activate_qos(priv, 0);
5229
5230         iwl_power_update_mode(priv, 0);
5231         /* we have just associated, don't start scan too early */
5232         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5233 }
5234
5235
5236 static void iwl4965_bg_post_associate(struct work_struct *data)
5237 {
5238         struct iwl_priv *priv = container_of(data, struct iwl_priv,
5239                                              post_associate.work);
5240
5241         mutex_lock(&priv->mutex);
5242         iwl4965_post_associate(priv);
5243         mutex_unlock(&priv->mutex);
5244
5245 }
5246
5247 static void iwl4965_bg_abort_scan(struct work_struct *work)
5248 {
5249         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5250
5251         if (!iwl_is_ready(priv))
5252                 return;
5253
5254         mutex_lock(&priv->mutex);
5255
5256         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5257         iwl4965_send_scan_abort(priv);
5258
5259         mutex_unlock(&priv->mutex);
5260 }
5261
5262 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5263
5264 static void iwl4965_bg_scan_completed(struct work_struct *work)
5265 {
5266         struct iwl_priv *priv =
5267             container_of(work, struct iwl_priv, scan_completed);
5268
5269         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5270
5271         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5272                 return;
5273
5274         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5275                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5276
5277         ieee80211_scan_completed(priv->hw);
5278
5279         /* Since setting the TXPOWER may have been deferred while
5280          * performing the scan, fire one off */
5281         mutex_lock(&priv->mutex);
5282         iwl4965_hw_reg_send_txpower(priv);
5283         mutex_unlock(&priv->mutex);
5284 }
5285
5286 /*****************************************************************************
5287  *
5288  * mac80211 entry point functions
5289  *
5290  *****************************************************************************/
5291
5292 #define UCODE_READY_TIMEOUT     (2 * HZ)
5293
5294 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5295 {
5296         struct iwl_priv *priv = hw->priv;
5297         int ret;
5298
5299         IWL_DEBUG_MAC80211("enter\n");
5300
5301         if (pci_enable_device(priv->pci_dev)) {
5302                 IWL_ERROR("Fail to pci_enable_device\n");
5303                 return -ENODEV;
5304         }
5305         pci_restore_state(priv->pci_dev);
5306         pci_enable_msi(priv->pci_dev);
5307
5308         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5309                           DRV_NAME, priv);
5310         if (ret) {
5311                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5312                 goto out_disable_msi;
5313         }
5314
5315         /* we should be verifying the device is ready to be opened */
5316         mutex_lock(&priv->mutex);
5317
5318         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5319         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5320          * ucode filename and max sizes are card-specific. */
5321
5322         if (!priv->ucode_code.len) {
5323                 ret = iwl4965_read_ucode(priv);
5324                 if (ret) {
5325                         IWL_ERROR("Could not read microcode: %d\n", ret);
5326                         mutex_unlock(&priv->mutex);
5327                         goto out_release_irq;
5328                 }
5329         }
5330
5331         ret = __iwl4965_up(priv);
5332
5333         mutex_unlock(&priv->mutex);
5334
5335         if (ret)
5336                 goto out_release_irq;
5337
5338         IWL_DEBUG_INFO("Start UP work done.\n");
5339
5340         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5341                 return 0;
5342
5343         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5344          * mac80211 will not be run successfully. */
5345         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5346                         test_bit(STATUS_READY, &priv->status),
5347                         UCODE_READY_TIMEOUT);
5348         if (!ret) {
5349                 if (!test_bit(STATUS_READY, &priv->status)) {
5350                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5351                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
5352                         ret = -ETIMEDOUT;
5353                         goto out_release_irq;
5354                 }
5355         }
5356
5357         priv->is_open = 1;
5358         IWL_DEBUG_MAC80211("leave\n");
5359         return 0;
5360
5361 out_release_irq:
5362         free_irq(priv->pci_dev->irq, priv);
5363 out_disable_msi:
5364         pci_disable_msi(priv->pci_dev);
5365         pci_disable_device(priv->pci_dev);
5366         priv->is_open = 0;
5367         IWL_DEBUG_MAC80211("leave - failed\n");
5368         return ret;
5369 }
5370
5371 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
5372 {
5373         struct iwl_priv *priv = hw->priv;
5374
5375         IWL_DEBUG_MAC80211("enter\n");
5376
5377         if (!priv->is_open) {
5378                 IWL_DEBUG_MAC80211("leave - skip\n");
5379                 return;
5380         }
5381
5382         priv->is_open = 0;
5383
5384         if (iwl_is_ready_rf(priv)) {
5385                 /* stop mac, cancel any scan request and clear
5386                  * RXON_FILTER_ASSOC_MSK BIT
5387                  */
5388                 mutex_lock(&priv->mutex);
5389                 iwl4965_scan_cancel_timeout(priv, 100);
5390                 cancel_delayed_work(&priv->post_associate);
5391                 mutex_unlock(&priv->mutex);
5392         }
5393
5394         iwl4965_down(priv);
5395
5396         flush_workqueue(priv->workqueue);
5397         free_irq(priv->pci_dev->irq, priv);
5398         pci_disable_msi(priv->pci_dev);
5399         pci_save_state(priv->pci_dev);
5400         pci_disable_device(priv->pci_dev);
5401
5402         IWL_DEBUG_MAC80211("leave\n");
5403 }
5404
5405 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
5406                       struct ieee80211_tx_control *ctl)
5407 {
5408         struct iwl_priv *priv = hw->priv;
5409
5410         IWL_DEBUG_MAC80211("enter\n");
5411
5412         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
5413                 IWL_DEBUG_MAC80211("leave - monitor\n");
5414                 return -1;
5415         }
5416
5417         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5418                      ctl->tx_rate->bitrate);
5419
5420         if (iwl4965_tx_skb(priv, skb, ctl))
5421                 dev_kfree_skb_any(skb);
5422
5423         IWL_DEBUG_MAC80211("leave\n");
5424         return 0;
5425 }
5426
5427 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
5428                                  struct ieee80211_if_init_conf *conf)
5429 {
5430         struct iwl_priv *priv = hw->priv;
5431         unsigned long flags;
5432         DECLARE_MAC_BUF(mac);
5433
5434         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5435
5436         if (priv->vif) {
5437                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5438                 return -EOPNOTSUPP;
5439         }
5440
5441         spin_lock_irqsave(&priv->lock, flags);
5442         priv->vif = conf->vif;
5443
5444         spin_unlock_irqrestore(&priv->lock, flags);
5445
5446         mutex_lock(&priv->mutex);
5447
5448         if (conf->mac_addr) {
5449                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
5450                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
5451         }
5452
5453         if (iwl_is_ready(priv))
5454                 iwl4965_set_mode(priv, conf->type);
5455
5456         mutex_unlock(&priv->mutex);
5457
5458         IWL_DEBUG_MAC80211("leave\n");
5459         return 0;
5460 }
5461
5462 /**
5463  * iwl4965_mac_config - mac80211 config callback
5464  *
5465  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
5466  * be set inappropriately and the driver currently sets the hardware up to
5467  * use it whenever needed.
5468  */
5469 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
5470 {
5471         struct iwl_priv *priv = hw->priv;
5472         const struct iwl_channel_info *ch_info;
5473         unsigned long flags;
5474         int ret = 0;
5475
5476         mutex_lock(&priv->mutex);
5477         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
5478
5479         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
5480
5481         if (!iwl_is_ready(priv)) {
5482                 IWL_DEBUG_MAC80211("leave - not ready\n");
5483                 ret = -EIO;
5484                 goto out;
5485         }
5486
5487         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
5488                      test_bit(STATUS_SCANNING, &priv->status))) {
5489                 IWL_DEBUG_MAC80211("leave - scanning\n");
5490                 set_bit(STATUS_CONF_PENDING, &priv->status);
5491                 mutex_unlock(&priv->mutex);
5492                 return 0;
5493         }
5494
5495         spin_lock_irqsave(&priv->lock, flags);
5496
5497         ch_info = iwl_get_channel_info(priv, conf->channel->band,
5498                         ieee80211_frequency_to_channel(conf->channel->center_freq));
5499         if (!is_channel_valid(ch_info)) {
5500                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
5501                 spin_unlock_irqrestore(&priv->lock, flags);
5502                 ret = -EINVAL;
5503                 goto out;
5504         }
5505
5506 #ifdef CONFIG_IWL4965_HT
5507         /* if we are switching from ht to 2.4 clear flags
5508          * from any ht related info since 2.4 does not
5509          * support ht */
5510         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
5511 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5512             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
5513 #endif
5514         )
5515                 priv->staging_rxon.flags = 0;
5516 #endif /* CONFIG_IWL4965_HT */
5517
5518         iwl_set_rxon_channel(priv, conf->channel->band,
5519                 ieee80211_frequency_to_channel(conf->channel->center_freq));
5520
5521         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
5522
5523         /* The list of supported rates and rate mask can be different
5524          * for each band; since the band may have changed, reset
5525          * the rate mask to what mac80211 lists */
5526         iwl4965_set_rate(priv);
5527
5528         spin_unlock_irqrestore(&priv->lock, flags);
5529
5530 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5531         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
5532                 iwl4965_hw_channel_switch(priv, conf->channel);
5533                 goto out;
5534         }
5535 #endif
5536
5537         if (priv->cfg->ops->lib->radio_kill_sw)
5538                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
5539
5540         if (!conf->radio_enabled) {
5541                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
5542                 goto out;
5543         }
5544
5545         if (iwl_is_rfkill(priv)) {
5546                 IWL_DEBUG_MAC80211("leave - RF kill\n");
5547                 ret = -EIO;
5548                 goto out;
5549         }
5550
5551         iwl4965_set_rate(priv);
5552
5553         if (memcmp(&priv->active_rxon,
5554                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
5555                 iwl4965_commit_rxon(priv);
5556         else
5557                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
5558
5559         IWL_DEBUG_MAC80211("leave\n");
5560
5561 out:
5562         clear_bit(STATUS_CONF_PENDING, &priv->status);
5563         mutex_unlock(&priv->mutex);
5564         return ret;
5565 }
5566
5567 static void iwl4965_config_ap(struct iwl_priv *priv)
5568 {
5569         int ret = 0;
5570
5571         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5572                 return;
5573
5574         /* The following should be done only at AP bring up */
5575         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
5576
5577                 /* RXON - unassoc (to set timing command) */
5578                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5579                 iwl4965_commit_rxon(priv);
5580
5581                 /* RXON Timing */
5582                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5583                 iwl4965_setup_rxon_timing(priv);
5584                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5585                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
5586                 if (ret)
5587                         IWL_WARNING("REPLY_RXON_TIMING failed - "
5588                                         "Attempting to continue.\n");
5589
5590                 iwl_set_rxon_chain(priv);
5591
5592                 /* FIXME: what should be the assoc_id for AP? */
5593                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5594                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5595                         priv->staging_rxon.flags |=
5596                                 RXON_FLG_SHORT_PREAMBLE_MSK;
5597                 else
5598                         priv->staging_rxon.flags &=
5599                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
5600
5601                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5602                         if (priv->assoc_capability &
5603                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
5604                                 priv->staging_rxon.flags |=
5605                                         RXON_FLG_SHORT_SLOT_MSK;
5606                         else
5607                                 priv->staging_rxon.flags &=
5608                                         ~RXON_FLG_SHORT_SLOT_MSK;
5609
5610                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5611                                 priv->staging_rxon.flags &=
5612                                         ~RXON_FLG_SHORT_SLOT_MSK;
5613                 }
5614                 /* restore RXON assoc */
5615                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5616                 iwl4965_commit_rxon(priv);
5617                 iwl4965_activate_qos(priv, 1);
5618                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5619         }
5620         iwl4965_send_beacon_cmd(priv);
5621
5622         /* FIXME - we need to add code here to detect a totally new
5623          * configuration, reset the AP, unassoc, rxon timing, assoc,
5624          * clear sta table, add BCAST sta... */
5625 }
5626
5627 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
5628                                         struct ieee80211_vif *vif,
5629                                     struct ieee80211_if_conf *conf)
5630 {
5631         struct iwl_priv *priv = hw->priv;
5632         DECLARE_MAC_BUF(mac);
5633         unsigned long flags;
5634         int rc;
5635
5636         if (conf == NULL)
5637                 return -EIO;
5638
5639         if (priv->vif != vif) {
5640                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
5641                 return 0;
5642         }
5643
5644         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
5645             (!conf->beacon || !conf->ssid_len)) {
5646                 IWL_DEBUG_MAC80211
5647                     ("Leaving in AP mode because HostAPD is not ready.\n");
5648                 return 0;
5649         }
5650
5651         if (!iwl_is_alive(priv))
5652                 return -EAGAIN;
5653
5654         mutex_lock(&priv->mutex);
5655
5656         if (conf->bssid)
5657                 IWL_DEBUG_MAC80211("bssid: %s\n",
5658                                    print_mac(mac, conf->bssid));
5659
5660 /*
5661  * very dubious code was here; the probe filtering flag is never set:
5662  *
5663         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
5664             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
5665  */
5666
5667         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5668                 if (!conf->bssid) {
5669                         conf->bssid = priv->mac_addr;
5670                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
5671                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
5672                                            print_mac(mac, conf->bssid));
5673                 }
5674                 if (priv->ibss_beacon)
5675                         dev_kfree_skb(priv->ibss_beacon);
5676
5677                 priv->ibss_beacon = conf->beacon;
5678         }
5679
5680         if (iwl_is_rfkill(priv))
5681                 goto done;
5682
5683         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
5684             !is_multicast_ether_addr(conf->bssid)) {
5685                 /* If there is currently a HW scan going on in the background
5686                  * then we need to cancel it else the RXON below will fail. */
5687                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
5688                         IWL_WARNING("Aborted scan still in progress "
5689                                     "after 100ms\n");
5690                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
5691                         mutex_unlock(&priv->mutex);
5692                         return -EAGAIN;
5693                 }
5694                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
5695
5696                 /* TODO: Audit driver for usage of these members and see
5697                  * if mac80211 deprecates them (priv->bssid looks like it
5698                  * shouldn't be there, but I haven't scanned the IBSS code
5699                  * to verify) - jpk */
5700                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
5701
5702                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
5703                         iwl4965_config_ap(priv);
5704                 else {
5705                         rc = iwl4965_commit_rxon(priv);
5706                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
5707                                 iwl4965_rxon_add_station(
5708                                         priv, priv->active_rxon.bssid_addr, 1);
5709                 }
5710
5711         } else {
5712                 iwl4965_scan_cancel_timeout(priv, 100);
5713                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5714                 iwl4965_commit_rxon(priv);
5715         }
5716
5717  done:
5718         spin_lock_irqsave(&priv->lock, flags);
5719         if (!conf->ssid_len)
5720                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
5721         else
5722                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
5723
5724         priv->essid_len = conf->ssid_len;
5725         spin_unlock_irqrestore(&priv->lock, flags);
5726
5727         IWL_DEBUG_MAC80211("leave\n");
5728         mutex_unlock(&priv->mutex);
5729
5730         return 0;
5731 }
5732
5733 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
5734                                  unsigned int changed_flags,
5735                                  unsigned int *total_flags,
5736                                  int mc_count, struct dev_addr_list *mc_list)
5737 {
5738         /*
5739          * XXX: dummy
5740          * see also iwl4965_connection_init_rx_config
5741          */
5742         *total_flags = 0;
5743 }
5744
5745 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
5746                                      struct ieee80211_if_init_conf *conf)
5747 {
5748         struct iwl_priv *priv = hw->priv;
5749
5750         IWL_DEBUG_MAC80211("enter\n");
5751
5752         mutex_lock(&priv->mutex);
5753
5754         if (iwl_is_ready_rf(priv)) {
5755                 iwl4965_scan_cancel_timeout(priv, 100);
5756                 cancel_delayed_work(&priv->post_associate);
5757                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5758                 iwl4965_commit_rxon(priv);
5759         }
5760         if (priv->vif == conf->vif) {
5761                 priv->vif = NULL;
5762                 memset(priv->bssid, 0, ETH_ALEN);
5763                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
5764                 priv->essid_len = 0;
5765         }
5766         mutex_unlock(&priv->mutex);
5767
5768         IWL_DEBUG_MAC80211("leave\n");
5769
5770 }
5771
5772 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
5773 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
5774                                      struct ieee80211_vif *vif,
5775                                      struct ieee80211_bss_conf *bss_conf,
5776                                      u32 changes)
5777 {
5778         struct iwl_priv *priv = hw->priv;
5779
5780         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
5781
5782         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5783                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
5784                                    bss_conf->use_short_preamble);
5785                 if (bss_conf->use_short_preamble)
5786                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5787                 else
5788                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5789         }
5790
5791         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5792                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5793                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
5794                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
5795                 else
5796                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5797         }
5798
5799         if (changes & BSS_CHANGED_HT) {
5800                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
5801                 iwl4965_ht_conf(priv, bss_conf);
5802                 iwl_set_rxon_chain(priv);
5803         }
5804
5805         if (changes & BSS_CHANGED_ASSOC) {
5806                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
5807                 /* This should never happen as this function should
5808                  * never be called from interrupt context. */
5809                 if (WARN_ON_ONCE(in_interrupt()))
5810                         return;
5811                 if (bss_conf->assoc) {
5812                         priv->assoc_id = bss_conf->aid;
5813                         priv->beacon_int = bss_conf->beacon_int;
5814                         priv->timestamp = bss_conf->timestamp;
5815                         priv->assoc_capability = bss_conf->assoc_capability;
5816                         priv->next_scan_jiffies = jiffies +
5817                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
5818                         mutex_lock(&priv->mutex);
5819                         iwl4965_post_associate(priv);
5820                         mutex_unlock(&priv->mutex);
5821                 } else {
5822                         priv->assoc_id = 0;
5823                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
5824                 }
5825         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
5826                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
5827                         iwl_send_rxon_assoc(priv);
5828         }
5829
5830 }
5831
5832 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
5833 {
5834         int rc = 0;
5835         unsigned long flags;
5836         struct iwl_priv *priv = hw->priv;
5837
5838         IWL_DEBUG_MAC80211("enter\n");
5839
5840         mutex_lock(&priv->mutex);
5841         spin_lock_irqsave(&priv->lock, flags);
5842
5843         if (!iwl_is_ready_rf(priv)) {
5844                 rc = -EIO;
5845                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
5846                 goto out_unlock;
5847         }
5848
5849         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
5850                 rc = -EIO;
5851                 IWL_ERROR("ERROR: APs don't scan\n");
5852                 goto out_unlock;
5853         }
5854
5855         /* we don't schedule scan within next_scan_jiffies period */
5856         if (priv->next_scan_jiffies &&
5857                         time_after(priv->next_scan_jiffies, jiffies)) {
5858                 rc = -EAGAIN;
5859                 goto out_unlock;
5860         }
5861         /* if we just finished scan ask for delay */
5862         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
5863                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
5864                 rc = -EAGAIN;
5865                 goto out_unlock;
5866         }
5867         if (len) {
5868                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
5869                                iwl4965_escape_essid(ssid, len), (int)len);
5870
5871                 priv->one_direct_scan = 1;
5872                 priv->direct_ssid_len = (u8)
5873                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
5874                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
5875         } else
5876                 priv->one_direct_scan = 0;
5877
5878         rc = iwl4965_scan_initiate(priv);
5879
5880         IWL_DEBUG_MAC80211("leave\n");
5881
5882 out_unlock:
5883         spin_unlock_irqrestore(&priv->lock, flags);
5884         mutex_unlock(&priv->mutex);
5885
5886         return rc;
5887 }
5888
5889 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
5890                         struct ieee80211_key_conf *keyconf, const u8 *addr,
5891                         u32 iv32, u16 *phase1key)
5892 {
5893         struct iwl_priv *priv = hw->priv;
5894         u8 sta_id = IWL_INVALID_STATION;
5895         unsigned long flags;
5896         __le16 key_flags = 0;
5897         int i;
5898         DECLARE_MAC_BUF(mac);
5899
5900         IWL_DEBUG_MAC80211("enter\n");
5901
5902         sta_id = iwl_find_station(priv, addr);
5903         if (sta_id == IWL_INVALID_STATION) {
5904                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
5905                                    print_mac(mac, addr));
5906                 return;
5907         }
5908
5909         iwl4965_scan_cancel_timeout(priv, 100);
5910
5911         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
5912         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
5913         key_flags &= ~STA_KEY_FLG_INVALID;
5914
5915         if (sta_id == priv->hw_params.bcast_sta_id)
5916                 key_flags |= STA_KEY_MULTICAST_MSK;
5917
5918         spin_lock_irqsave(&priv->sta_lock, flags);
5919
5920         priv->stations[sta_id].sta.key.key_flags = key_flags;
5921         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
5922
5923         for (i = 0; i < 5; i++)
5924                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
5925                         cpu_to_le16(phase1key[i]);
5926
5927         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
5928         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
5929
5930         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
5931
5932         spin_unlock_irqrestore(&priv->sta_lock, flags);
5933
5934         IWL_DEBUG_MAC80211("leave\n");
5935 }
5936
5937 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5938                            const u8 *local_addr, const u8 *addr,
5939                            struct ieee80211_key_conf *key)
5940 {
5941         struct iwl_priv *priv = hw->priv;
5942         DECLARE_MAC_BUF(mac);
5943         int ret = 0;
5944         u8 sta_id = IWL_INVALID_STATION;
5945         u8 is_default_wep_key = 0;
5946
5947         IWL_DEBUG_MAC80211("enter\n");
5948
5949         if (priv->hw_params.sw_crypto) {
5950                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
5951                 return -EOPNOTSUPP;
5952         }
5953
5954         if (is_zero_ether_addr(addr))
5955                 /* only support pairwise keys */
5956                 return -EOPNOTSUPP;
5957
5958         sta_id = iwl_find_station(priv, addr);
5959         if (sta_id == IWL_INVALID_STATION) {
5960                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
5961                                    print_mac(mac, addr));
5962                 return -EINVAL;
5963
5964         }
5965
5966         mutex_lock(&priv->mutex);
5967         iwl4965_scan_cancel_timeout(priv, 100);
5968         mutex_unlock(&priv->mutex);
5969
5970         /* If we are getting WEP group key and we didn't receive any key mapping
5971          * so far, we are in legacy wep mode (group key only), otherwise we are
5972          * in 1X mode.
5973          * In legacy wep mode, we use another host command to the uCode */
5974         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
5975                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
5976                 if (cmd == SET_KEY)
5977                         is_default_wep_key = !priv->key_mapping_key;
5978                 else
5979                         is_default_wep_key = priv->default_wep_key;
5980         }
5981
5982         switch (cmd) {
5983         case SET_KEY:
5984                 if (is_default_wep_key)
5985                         ret = iwl_set_default_wep_key(priv, key);
5986                 else
5987                         ret = iwl_set_dynamic_key(priv, key, sta_id);
5988
5989                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
5990                 break;
5991         case DISABLE_KEY:
5992                 if (is_default_wep_key)
5993                         ret = iwl_remove_default_wep_key(priv, key);
5994                 else
5995                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
5996
5997                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
5998                 break;
5999         default:
6000                 ret = -EINVAL;
6001         }
6002
6003         IWL_DEBUG_MAC80211("leave\n");
6004
6005         return ret;
6006 }
6007
6008 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
6009                            const struct ieee80211_tx_queue_params *params)
6010 {
6011         struct iwl_priv *priv = hw->priv;
6012         unsigned long flags;
6013         int q;
6014
6015         IWL_DEBUG_MAC80211("enter\n");
6016
6017         if (!iwl_is_ready_rf(priv)) {
6018                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6019                 return -EIO;
6020         }
6021
6022         if (queue >= AC_NUM) {
6023                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6024                 return 0;
6025         }
6026
6027         if (!priv->qos_data.qos_enable) {
6028                 priv->qos_data.qos_active = 0;
6029                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6030                 return 0;
6031         }
6032         q = AC_NUM - 1 - queue;
6033
6034         spin_lock_irqsave(&priv->lock, flags);
6035
6036         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6037         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6038         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6039         priv->qos_data.def_qos_parm.ac[q].edca_txop =
6040                         cpu_to_le16((params->txop * 32));
6041
6042         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6043         priv->qos_data.qos_active = 1;
6044
6045         spin_unlock_irqrestore(&priv->lock, flags);
6046
6047         mutex_lock(&priv->mutex);
6048         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6049                 iwl4965_activate_qos(priv, 1);
6050         else if (priv->assoc_id && iwl_is_associated(priv))
6051                 iwl4965_activate_qos(priv, 0);
6052
6053         mutex_unlock(&priv->mutex);
6054
6055         IWL_DEBUG_MAC80211("leave\n");
6056         return 0;
6057 }
6058
6059 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6060                                 struct ieee80211_tx_queue_stats *stats)
6061 {
6062         struct iwl_priv *priv = hw->priv;
6063         int i, avail;
6064         struct iwl4965_tx_queue *txq;
6065         struct iwl4965_queue *q;
6066         unsigned long flags;
6067
6068         IWL_DEBUG_MAC80211("enter\n");
6069
6070         if (!iwl_is_ready_rf(priv)) {
6071                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6072                 return -EIO;
6073         }
6074
6075         spin_lock_irqsave(&priv->lock, flags);
6076
6077         for (i = 0; i < AC_NUM; i++) {
6078                 txq = &priv->txq[i];
6079                 q = &txq->q;
6080                 avail = iwl4965_queue_space(q);
6081
6082                 stats[i].len = q->n_window - avail;
6083                 stats[i].limit = q->n_window - q->high_mark;
6084                 stats[i].count = q->n_window;
6085
6086         }
6087         spin_unlock_irqrestore(&priv->lock, flags);
6088
6089         IWL_DEBUG_MAC80211("leave\n");
6090
6091         return 0;
6092 }
6093
6094 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6095                              struct ieee80211_low_level_stats *stats)
6096 {
6097         IWL_DEBUG_MAC80211("enter\n");
6098         IWL_DEBUG_MAC80211("leave\n");
6099
6100         return 0;
6101 }
6102
6103 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6104 {
6105         IWL_DEBUG_MAC80211("enter\n");
6106         IWL_DEBUG_MAC80211("leave\n");
6107
6108         return 0;
6109 }
6110
6111 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6112 {
6113         struct iwl_priv *priv = hw->priv;
6114         unsigned long flags;
6115
6116         mutex_lock(&priv->mutex);
6117         IWL_DEBUG_MAC80211("enter\n");
6118
6119         priv->lq_mngr.lq_ready = 0;
6120 #ifdef CONFIG_IWL4965_HT
6121         spin_lock_irqsave(&priv->lock, flags);
6122         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6123         spin_unlock_irqrestore(&priv->lock, flags);
6124 #endif /* CONFIG_IWL4965_HT */
6125
6126         iwl_reset_qos(priv);
6127
6128         cancel_delayed_work(&priv->post_associate);
6129
6130         spin_lock_irqsave(&priv->lock, flags);
6131         priv->assoc_id = 0;
6132         priv->assoc_capability = 0;
6133         priv->assoc_station_added = 0;
6134
6135         /* new association get rid of ibss beacon skb */
6136         if (priv->ibss_beacon)
6137                 dev_kfree_skb(priv->ibss_beacon);
6138
6139         priv->ibss_beacon = NULL;
6140
6141         priv->beacon_int = priv->hw->conf.beacon_int;
6142         priv->timestamp = 0;
6143         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6144                 priv->beacon_int = 0;
6145
6146         spin_unlock_irqrestore(&priv->lock, flags);
6147
6148         if (!iwl_is_ready_rf(priv)) {
6149                 IWL_DEBUG_MAC80211("leave - not ready\n");
6150                 mutex_unlock(&priv->mutex);
6151                 return;
6152         }
6153
6154         /* we are restarting association process
6155          * clear RXON_FILTER_ASSOC_MSK bit
6156          */
6157         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6158                 iwl4965_scan_cancel_timeout(priv, 100);
6159                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6160                 iwl4965_commit_rxon(priv);
6161         }
6162
6163         iwl_power_update_mode(priv, 0);
6164
6165         /* Per mac80211.h: This is only used in IBSS mode... */
6166         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6167
6168                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6169                 mutex_unlock(&priv->mutex);
6170                 return;
6171         }
6172
6173         iwl4965_set_rate(priv);
6174
6175         mutex_unlock(&priv->mutex);
6176
6177         IWL_DEBUG_MAC80211("leave\n");
6178 }
6179
6180 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
6181                                  struct ieee80211_tx_control *control)
6182 {
6183         struct iwl_priv *priv = hw->priv;
6184         unsigned long flags;
6185
6186         mutex_lock(&priv->mutex);
6187         IWL_DEBUG_MAC80211("enter\n");
6188
6189         if (!iwl_is_ready_rf(priv)) {
6190                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6191                 mutex_unlock(&priv->mutex);
6192                 return -EIO;
6193         }
6194
6195         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6196                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6197                 mutex_unlock(&priv->mutex);
6198                 return -EIO;
6199         }
6200
6201         spin_lock_irqsave(&priv->lock, flags);
6202
6203         if (priv->ibss_beacon)
6204                 dev_kfree_skb(priv->ibss_beacon);
6205
6206         priv->ibss_beacon = skb;
6207
6208         priv->assoc_id = 0;
6209
6210         IWL_DEBUG_MAC80211("leave\n");
6211         spin_unlock_irqrestore(&priv->lock, flags);
6212
6213         iwl_reset_qos(priv);
6214
6215         queue_work(priv->workqueue, &priv->post_associate.work);
6216
6217         mutex_unlock(&priv->mutex);
6218
6219         return 0;
6220 }
6221
6222 /*****************************************************************************
6223  *
6224  * sysfs attributes
6225  *
6226  *****************************************************************************/
6227
6228 #ifdef CONFIG_IWLWIFI_DEBUG
6229
6230 /*
6231  * The following adds a new attribute to the sysfs representation
6232  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6233  * used for controlling the debug level.
6234  *
6235  * See the level definitions in iwl for details.
6236  */
6237
6238 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6239 {
6240         return sprintf(buf, "0x%08X\n", iwl_debug_level);
6241 }
6242 static ssize_t store_debug_level(struct device_driver *d,
6243                                  const char *buf, size_t count)
6244 {
6245         char *p = (char *)buf;
6246         u32 val;
6247
6248         val = simple_strtoul(p, &p, 0);
6249         if (p == buf)
6250                 printk(KERN_INFO DRV_NAME
6251                        ": %s is not in hex or decimal form.\n", buf);
6252         else
6253                 iwl_debug_level = val;
6254
6255         return strnlen(buf, count);
6256 }
6257
6258 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6259                    show_debug_level, store_debug_level);
6260
6261 #endif /* CONFIG_IWLWIFI_DEBUG */
6262
6263
6264 static ssize_t show_temperature(struct device *d,
6265                                 struct device_attribute *attr, char *buf)
6266 {
6267         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6268
6269         if (!iwl_is_alive(priv))
6270                 return -EAGAIN;
6271
6272         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6273 }
6274
6275 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6276
6277 static ssize_t show_rs_window(struct device *d,
6278                               struct device_attribute *attr,
6279                               char *buf)
6280 {
6281         struct iwl_priv *priv = d->driver_data;
6282         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
6283 }
6284 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
6285
6286 static ssize_t show_tx_power(struct device *d,
6287                              struct device_attribute *attr, char *buf)
6288 {
6289         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6290         return sprintf(buf, "%d\n", priv->user_txpower_limit);
6291 }
6292
6293 static ssize_t store_tx_power(struct device *d,
6294                               struct device_attribute *attr,
6295                               const char *buf, size_t count)
6296 {
6297         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6298         char *p = (char *)buf;
6299         u32 val;
6300
6301         val = simple_strtoul(p, &p, 10);
6302         if (p == buf)
6303                 printk(KERN_INFO DRV_NAME
6304                        ": %s is not in decimal form.\n", buf);
6305         else
6306                 iwl4965_hw_reg_set_txpower(priv, val);
6307
6308         return count;
6309 }
6310
6311 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6312
6313 static ssize_t show_flags(struct device *d,
6314                           struct device_attribute *attr, char *buf)
6315 {
6316         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6317
6318         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
6319 }
6320
6321 static ssize_t store_flags(struct device *d,
6322                            struct device_attribute *attr,
6323                            const char *buf, size_t count)
6324 {
6325         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6326         u32 flags = simple_strtoul(buf, NULL, 0);
6327
6328         mutex_lock(&priv->mutex);
6329         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
6330                 /* Cancel any currently running scans... */
6331                 if (iwl4965_scan_cancel_timeout(priv, 100))
6332                         IWL_WARNING("Could not cancel scan.\n");
6333                 else {
6334                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6335                                        flags);
6336                         priv->staging_rxon.flags = cpu_to_le32(flags);
6337                         iwl4965_commit_rxon(priv);
6338                 }
6339         }
6340         mutex_unlock(&priv->mutex);
6341
6342         return count;
6343 }
6344
6345 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6346
6347 static ssize_t show_filter_flags(struct device *d,
6348                                  struct device_attribute *attr, char *buf)
6349 {
6350         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6351
6352         return sprintf(buf, "0x%04X\n",
6353                 le32_to_cpu(priv->active_rxon.filter_flags));
6354 }
6355
6356 static ssize_t store_filter_flags(struct device *d,
6357                                   struct device_attribute *attr,
6358                                   const char *buf, size_t count)
6359 {
6360         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6361         u32 filter_flags = simple_strtoul(buf, NULL, 0);
6362
6363         mutex_lock(&priv->mutex);
6364         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
6365                 /* Cancel any currently running scans... */
6366                 if (iwl4965_scan_cancel_timeout(priv, 100))
6367                         IWL_WARNING("Could not cancel scan.\n");
6368                 else {
6369                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
6370                                        "0x%04X\n", filter_flags);
6371                         priv->staging_rxon.filter_flags =
6372                                 cpu_to_le32(filter_flags);
6373                         iwl4965_commit_rxon(priv);
6374                 }
6375         }
6376         mutex_unlock(&priv->mutex);
6377
6378         return count;
6379 }
6380
6381 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
6382                    store_filter_flags);
6383
6384 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
6385
6386 static ssize_t show_measurement(struct device *d,
6387                                 struct device_attribute *attr, char *buf)
6388 {
6389         struct iwl_priv *priv = dev_get_drvdata(d);
6390         struct iwl4965_spectrum_notification measure_report;
6391         u32 size = sizeof(measure_report), len = 0, ofs = 0;
6392         u8 *data = (u8 *) & measure_report;
6393         unsigned long flags;
6394
6395         spin_lock_irqsave(&priv->lock, flags);
6396         if (!(priv->measurement_status & MEASUREMENT_READY)) {
6397                 spin_unlock_irqrestore(&priv->lock, flags);
6398                 return 0;
6399         }
6400         memcpy(&measure_report, &priv->measure_report, size);
6401         priv->measurement_status = 0;
6402         spin_unlock_irqrestore(&priv->lock, flags);
6403
6404         while (size && (PAGE_SIZE - len)) {
6405                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6406                                    PAGE_SIZE - len, 1);
6407                 len = strlen(buf);
6408                 if (PAGE_SIZE - len)
6409                         buf[len++] = '\n';
6410
6411                 ofs += 16;
6412                 size -= min(size, 16U);
6413         }
6414
6415         return len;
6416 }
6417
6418 static ssize_t store_measurement(struct device *d,
6419                                  struct device_attribute *attr,
6420                                  const char *buf, size_t count)
6421 {
6422         struct iwl_priv *priv = dev_get_drvdata(d);
6423         struct ieee80211_measurement_params params = {
6424                 .channel = le16_to_cpu(priv->active_rxon.channel),
6425                 .start_time = cpu_to_le64(priv->last_tsf),
6426                 .duration = cpu_to_le16(1),
6427         };
6428         u8 type = IWL_MEASURE_BASIC;
6429         u8 buffer[32];
6430         u8 channel;
6431
6432         if (count) {
6433                 char *p = buffer;
6434                 strncpy(buffer, buf, min(sizeof(buffer), count));
6435                 channel = simple_strtoul(p, NULL, 0);
6436                 if (channel)
6437                         params.channel = channel;
6438
6439                 p = buffer;
6440                 while (*p && *p != ' ')
6441                         p++;
6442                 if (*p)
6443                         type = simple_strtoul(p + 1, NULL, 0);
6444         }
6445
6446         IWL_DEBUG_INFO("Invoking measurement of type %d on "
6447                        "channel %d (for '%s')\n", type, params.channel, buf);
6448         iwl4965_get_measurement(priv, &params, type);
6449
6450         return count;
6451 }
6452
6453 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
6454                    show_measurement, store_measurement);
6455 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
6456
6457 static ssize_t store_retry_rate(struct device *d,
6458                                 struct device_attribute *attr,
6459                                 const char *buf, size_t count)
6460 {
6461         struct iwl_priv *priv = dev_get_drvdata(d);
6462
6463         priv->retry_rate = simple_strtoul(buf, NULL, 0);
6464         if (priv->retry_rate <= 0)
6465                 priv->retry_rate = 1;
6466
6467         return count;
6468 }
6469
6470 static ssize_t show_retry_rate(struct device *d,
6471                                struct device_attribute *attr, char *buf)
6472 {
6473         struct iwl_priv *priv = dev_get_drvdata(d);
6474         return sprintf(buf, "%d", priv->retry_rate);
6475 }
6476
6477 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
6478                    store_retry_rate);
6479
6480 static ssize_t store_power_level(struct device *d,
6481                                  struct device_attribute *attr,
6482                                  const char *buf, size_t count)
6483 {
6484         struct iwl_priv *priv = dev_get_drvdata(d);
6485         int rc;
6486         int mode;
6487
6488         mode = simple_strtoul(buf, NULL, 0);
6489         mutex_lock(&priv->mutex);
6490
6491         if (!iwl_is_ready(priv)) {
6492                 rc = -EAGAIN;
6493                 goto out;
6494         }
6495
6496         rc = iwl_power_set_user_mode(priv, mode);
6497         if (rc) {
6498                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
6499                 goto out;
6500         }
6501         rc = count;
6502
6503  out:
6504         mutex_unlock(&priv->mutex);
6505         return rc;
6506 }
6507
6508 #define MAX_WX_STRING 80
6509
6510 /* Values are in microsecond */
6511 static const s32 timeout_duration[] = {
6512         350000,
6513         250000,
6514         75000,
6515         37000,
6516         25000,
6517 };
6518 static const s32 period_duration[] = {
6519         400000,
6520         700000,
6521         1000000,
6522         1000000,
6523         1000000
6524 };
6525
6526 static ssize_t show_power_level(struct device *d,
6527                                 struct device_attribute *attr, char *buf)
6528 {
6529         struct iwl_priv *priv = dev_get_drvdata(d);
6530         int level = priv->power_data.power_mode;
6531         char *p = buf;
6532
6533         p += sprintf(p, "%d ", level);
6534         switch (level) {
6535         case IWL_POWER_MODE_CAM:
6536         case IWL_POWER_AC:
6537                 p += sprintf(p, "(AC)");
6538                 break;
6539         case IWL_POWER_BATTERY:
6540                 p += sprintf(p, "(BATTERY)");
6541                 break;
6542         default:
6543                 p += sprintf(p,
6544                              "(Timeout %dms, Period %dms)",
6545                              timeout_duration[level - 1] / 1000,
6546                              period_duration[level - 1] / 1000);
6547         }
6548 /*
6549         if (!(priv->power_mode & IWL_POWER_ENABLED))
6550                 p += sprintf(p, " OFF\n");
6551         else
6552                 p += sprintf(p, " \n");
6553 */
6554         p += sprintf(p, " \n");
6555         return (p - buf + 1);
6556 }
6557
6558 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
6559                    store_power_level);
6560
6561 static ssize_t show_channels(struct device *d,
6562                              struct device_attribute *attr, char *buf)
6563 {
6564         /* all this shit doesn't belong into sysfs anyway */
6565         return 0;
6566 }
6567
6568 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
6569
6570 static ssize_t show_statistics(struct device *d,
6571                                struct device_attribute *attr, char *buf)
6572 {
6573         struct iwl_priv *priv = dev_get_drvdata(d);
6574         u32 size = sizeof(struct iwl4965_notif_statistics);
6575         u32 len = 0, ofs = 0;
6576         u8 *data = (u8 *) & priv->statistics;
6577         int rc = 0;
6578
6579         if (!iwl_is_alive(priv))
6580                 return -EAGAIN;
6581
6582         mutex_lock(&priv->mutex);
6583         rc = iwl_send_statistics_request(priv, 0);
6584         mutex_unlock(&priv->mutex);
6585
6586         if (rc) {
6587                 len = sprintf(buf,
6588                               "Error sending statistics request: 0x%08X\n", rc);
6589                 return len;
6590         }
6591
6592         while (size && (PAGE_SIZE - len)) {
6593                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6594                                    PAGE_SIZE - len, 1);
6595                 len = strlen(buf);
6596                 if (PAGE_SIZE - len)
6597                         buf[len++] = '\n';
6598
6599                 ofs += 16;
6600                 size -= min(size, 16U);
6601         }
6602
6603         return len;
6604 }
6605
6606 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
6607
6608 static ssize_t show_status(struct device *d,
6609                            struct device_attribute *attr, char *buf)
6610 {
6611         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6612         if (!iwl_is_alive(priv))
6613                 return -EAGAIN;
6614         return sprintf(buf, "0x%08x\n", (int)priv->status);
6615 }
6616
6617 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
6618
6619 static ssize_t dump_error_log(struct device *d,
6620                               struct device_attribute *attr,
6621                               const char *buf, size_t count)
6622 {
6623         char *p = (char *)buf;
6624
6625         if (p[0] == '1')
6626                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
6627
6628         return strnlen(buf, count);
6629 }
6630
6631 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
6632
6633 static ssize_t dump_event_log(struct device *d,
6634                               struct device_attribute *attr,
6635                               const char *buf, size_t count)
6636 {
6637         char *p = (char *)buf;
6638
6639         if (p[0] == '1')
6640                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
6641
6642         return strnlen(buf, count);
6643 }
6644
6645 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
6646
6647 /*****************************************************************************
6648  *
6649  * driver setup and teardown
6650  *
6651  *****************************************************************************/
6652
6653 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
6654 {
6655         priv->workqueue = create_workqueue(DRV_NAME);
6656
6657         init_waitqueue_head(&priv->wait_command_queue);
6658
6659         INIT_WORK(&priv->up, iwl4965_bg_up);
6660         INIT_WORK(&priv->restart, iwl4965_bg_restart);
6661         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
6662         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
6663         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
6664         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
6665         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
6666         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
6667         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
6668         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
6669         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
6670         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
6671
6672         iwl4965_hw_setup_deferred_work(priv);
6673
6674         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
6675                      iwl4965_irq_tasklet, (unsigned long)priv);
6676 }
6677
6678 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
6679 {
6680         iwl4965_hw_cancel_deferred_work(priv);
6681
6682         cancel_delayed_work_sync(&priv->init_alive_start);
6683         cancel_delayed_work(&priv->scan_check);
6684         cancel_delayed_work(&priv->alive_start);
6685         cancel_delayed_work(&priv->post_associate);
6686         cancel_work_sync(&priv->beacon_update);
6687 }
6688
6689 static struct attribute *iwl4965_sysfs_entries[] = {
6690         &dev_attr_channels.attr,
6691         &dev_attr_dump_errors.attr,
6692         &dev_attr_dump_events.attr,
6693         &dev_attr_flags.attr,
6694         &dev_attr_filter_flags.attr,
6695 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
6696         &dev_attr_measurement.attr,
6697 #endif
6698         &dev_attr_power_level.attr,
6699         &dev_attr_retry_rate.attr,
6700         &dev_attr_rs_window.attr,
6701         &dev_attr_statistics.attr,
6702         &dev_attr_status.attr,
6703         &dev_attr_temperature.attr,
6704         &dev_attr_tx_power.attr,
6705
6706         NULL
6707 };
6708
6709 static struct attribute_group iwl4965_attribute_group = {
6710         .name = NULL,           /* put in device directory */
6711         .attrs = iwl4965_sysfs_entries,
6712 };
6713
6714 static struct ieee80211_ops iwl4965_hw_ops = {
6715         .tx = iwl4965_mac_tx,
6716         .start = iwl4965_mac_start,
6717         .stop = iwl4965_mac_stop,
6718         .add_interface = iwl4965_mac_add_interface,
6719         .remove_interface = iwl4965_mac_remove_interface,
6720         .config = iwl4965_mac_config,
6721         .config_interface = iwl4965_mac_config_interface,
6722         .configure_filter = iwl4965_configure_filter,
6723         .set_key = iwl4965_mac_set_key,
6724         .update_tkip_key = iwl4965_mac_update_tkip_key,
6725         .get_stats = iwl4965_mac_get_stats,
6726         .get_tx_stats = iwl4965_mac_get_tx_stats,
6727         .conf_tx = iwl4965_mac_conf_tx,
6728         .get_tsf = iwl4965_mac_get_tsf,
6729         .reset_tsf = iwl4965_mac_reset_tsf,
6730         .beacon_update = iwl4965_mac_beacon_update,
6731         .bss_info_changed = iwl4965_bss_info_changed,
6732 #ifdef CONFIG_IWL4965_HT
6733         .ampdu_action = iwl4965_mac_ampdu_action,
6734 #endif  /* CONFIG_IWL4965_HT */
6735         .hw_scan = iwl4965_mac_hw_scan
6736 };
6737
6738 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6739 {
6740         int err = 0;
6741         struct iwl_priv *priv;
6742         struct ieee80211_hw *hw;
6743         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
6744         unsigned long flags;
6745         DECLARE_MAC_BUF(mac);
6746
6747         /************************
6748          * 1. Allocating HW data
6749          ************************/
6750
6751         /* Disabling hardware scan means that mac80211 will perform scans
6752          * "the hard way", rather than using device's scan. */
6753         if (cfg->mod_params->disable_hw_scan) {
6754                 IWL_DEBUG_INFO("Disabling hw_scan\n");
6755                 iwl4965_hw_ops.hw_scan = NULL;
6756         }
6757
6758         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
6759         if (!hw) {
6760                 err = -ENOMEM;
6761                 goto out;
6762         }
6763         priv = hw->priv;
6764         /* At this point both hw and priv are allocated. */
6765
6766         SET_IEEE80211_DEV(hw, &pdev->dev);
6767
6768         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
6769         priv->cfg = cfg;
6770         priv->pci_dev = pdev;
6771
6772 #ifdef CONFIG_IWLWIFI_DEBUG
6773         iwl_debug_level = priv->cfg->mod_params->debug;
6774         atomic_set(&priv->restrict_refcnt, 0);
6775 #endif
6776
6777         /**************************
6778          * 2. Initializing PCI bus
6779          **************************/
6780         if (pci_enable_device(pdev)) {
6781                 err = -ENODEV;
6782                 goto out_ieee80211_free_hw;
6783         }
6784
6785         pci_set_master(pdev);
6786
6787         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
6788         if (!err)
6789                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
6790         if (err) {
6791                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
6792                 if (!err)
6793                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
6794                 /* both attempts failed: */
6795                 if (err) {
6796                         printk(KERN_WARNING "%s: No suitable DMA available.\n",
6797                                 DRV_NAME);
6798                         goto out_pci_disable_device;
6799                 }
6800         }
6801
6802         err = pci_request_regions(pdev, DRV_NAME);
6803         if (err)
6804                 goto out_pci_disable_device;
6805
6806         pci_set_drvdata(pdev, priv);
6807
6808         /* We disable the RETRY_TIMEOUT register (0x41) to keep
6809          * PCI Tx retries from interfering with C3 CPU state */
6810         pci_write_config_byte(pdev, 0x41, 0x00);
6811
6812         /***********************
6813          * 3. Read REV register
6814          ***********************/
6815         priv->hw_base = pci_iomap(pdev, 0, 0);
6816         if (!priv->hw_base) {
6817                 err = -ENODEV;
6818                 goto out_pci_release_regions;
6819         }
6820
6821         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
6822                 (unsigned long long) pci_resource_len(pdev, 0));
6823         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
6824
6825         iwl_hw_detect(priv);
6826         printk(KERN_INFO DRV_NAME
6827                 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
6828                 priv->cfg->name, priv->hw_rev);
6829
6830         /* amp init */
6831         err = priv->cfg->ops->lib->apm_ops.init(priv);
6832         if (err < 0) {
6833                 IWL_DEBUG_INFO("Failed to init APMG\n");
6834                 goto out_iounmap;
6835         }
6836         /*****************
6837          * 4. Read EEPROM
6838          *****************/
6839         /* Read the EEPROM */
6840         err = iwl_eeprom_init(priv);
6841         if (err) {
6842                 IWL_ERROR("Unable to init EEPROM\n");
6843                 goto out_iounmap;
6844         }
6845         err = iwl_eeprom_check_version(priv);
6846         if (err)
6847                 goto out_iounmap;
6848
6849         /* MAC Address location in EEPROM same for 3945/4965 */
6850         iwl_eeprom_get_mac(priv, priv->mac_addr);
6851         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
6852         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6853
6854         /************************
6855          * 5. Setup HW constants
6856          ************************/
6857         /* Device-specific setup */
6858         if (priv->cfg->ops->lib->set_hw_params(priv)) {
6859                 IWL_ERROR("failed to set hw parameters\n");
6860                 goto out_free_eeprom;
6861         }
6862
6863         /*******************
6864          * 6. Setup hw/priv
6865          *******************/
6866
6867         err = iwl_setup(priv);
6868         if (err)
6869                 goto out_free_eeprom;
6870         /* At this point both hw and priv are initialized. */
6871
6872         /**********************************
6873          * 7. Initialize module parameters
6874          **********************************/
6875
6876         /* Disable radio (SW RF KILL) via parameter when loading driver */
6877         if (priv->cfg->mod_params->disable) {
6878                 set_bit(STATUS_RF_KILL_SW, &priv->status);
6879                 IWL_DEBUG_INFO("Radio disabled.\n");
6880         }
6881
6882         if (priv->cfg->mod_params->enable_qos)
6883                 priv->qos_data.qos_enable = 1;
6884
6885         /********************
6886          * 8. Setup services
6887          ********************/
6888         spin_lock_irqsave(&priv->lock, flags);
6889         iwl4965_disable_interrupts(priv);
6890         spin_unlock_irqrestore(&priv->lock, flags);
6891
6892         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
6893         if (err) {
6894                 IWL_ERROR("failed to create sysfs device attributes\n");
6895                 goto out_free_eeprom;
6896         }
6897
6898         err = iwl_dbgfs_register(priv, DRV_NAME);
6899         if (err) {
6900                 IWL_ERROR("failed to create debugfs files\n");
6901                 goto out_remove_sysfs;
6902         }
6903
6904         iwl4965_setup_deferred_work(priv);
6905         iwl4965_setup_rx_handlers(priv);
6906
6907         /********************
6908          * 9. Conclude
6909          ********************/
6910         pci_save_state(pdev);
6911         pci_disable_device(pdev);
6912
6913         /* notify iwlcore to init */
6914         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
6915         return 0;
6916
6917  out_remove_sysfs:
6918         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
6919  out_free_eeprom:
6920         iwl_eeprom_free(priv);
6921  out_iounmap:
6922         pci_iounmap(pdev, priv->hw_base);
6923  out_pci_release_regions:
6924         pci_release_regions(pdev);
6925         pci_set_drvdata(pdev, NULL);
6926  out_pci_disable_device:
6927         pci_disable_device(pdev);
6928  out_ieee80211_free_hw:
6929         ieee80211_free_hw(priv->hw);
6930  out:
6931         return err;
6932 }
6933
6934 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
6935 {
6936         struct iwl_priv *priv = pci_get_drvdata(pdev);
6937         struct list_head *p, *q;
6938         int i;
6939         unsigned long flags;
6940
6941         if (!priv)
6942                 return;
6943
6944         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
6945
6946         if (priv->mac80211_registered) {
6947                 ieee80211_unregister_hw(priv->hw);
6948                 priv->mac80211_registered = 0;
6949         }
6950
6951         set_bit(STATUS_EXIT_PENDING, &priv->status);
6952
6953         iwl4965_down(priv);
6954
6955         /* make sure we flush any pending irq or
6956          * tasklet for the driver
6957          */
6958         spin_lock_irqsave(&priv->lock, flags);
6959         iwl4965_disable_interrupts(priv);
6960         spin_unlock_irqrestore(&priv->lock, flags);
6961
6962         iwl_synchronize_irq(priv);
6963
6964         /* Free MAC hash list for ADHOC */
6965         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
6966                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
6967                         list_del(p);
6968                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
6969                 }
6970         }
6971
6972         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
6973         iwl_dbgfs_unregister(priv);
6974         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
6975
6976         iwl4965_dealloc_ucode_pci(priv);
6977
6978         if (priv->rxq.bd)
6979                 iwl_rx_queue_free(priv, &priv->rxq);
6980         iwl4965_hw_txq_ctx_free(priv);
6981
6982         iwlcore_clear_stations_table(priv);
6983         iwl_eeprom_free(priv);
6984
6985
6986         /*netif_stop_queue(dev); */
6987         flush_workqueue(priv->workqueue);
6988
6989         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
6990          * priv->workqueue... so we can't take down the workqueue
6991          * until now... */
6992         destroy_workqueue(priv->workqueue);
6993         priv->workqueue = NULL;
6994
6995         pci_iounmap(pdev, priv->hw_base);
6996         pci_release_regions(pdev);
6997         pci_disable_device(pdev);
6998         pci_set_drvdata(pdev, NULL);
6999
7000         iwl_free_channel_map(priv);
7001         iwlcore_free_geos(priv);
7002
7003         if (priv->ibss_beacon)
7004                 dev_kfree_skb(priv->ibss_beacon);
7005
7006         ieee80211_free_hw(priv->hw);
7007 }
7008
7009 #ifdef CONFIG_PM
7010
7011 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7012 {
7013         struct iwl_priv *priv = pci_get_drvdata(pdev);
7014
7015         if (priv->is_open) {
7016                 set_bit(STATUS_IN_SUSPEND, &priv->status);
7017                 iwl4965_mac_stop(priv->hw);
7018                 priv->is_open = 1;
7019         }
7020
7021         pci_set_power_state(pdev, PCI_D3hot);
7022
7023         return 0;
7024 }
7025
7026 static int iwl4965_pci_resume(struct pci_dev *pdev)
7027 {
7028         struct iwl_priv *priv = pci_get_drvdata(pdev);
7029
7030         pci_set_power_state(pdev, PCI_D0);
7031
7032         if (priv->is_open)
7033                 iwl4965_mac_start(priv->hw);
7034
7035         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7036         return 0;
7037 }
7038
7039 #endif /* CONFIG_PM */
7040
7041 /*****************************************************************************
7042  *
7043  * driver and module entry point
7044  *
7045  *****************************************************************************/
7046
7047 /* Hardware specific file defines the PCI IDs table for that hardware module */
7048 static struct pci_device_id iwl_hw_card_ids[] = {
7049         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7050         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7051 #ifdef CONFIG_IWL5000
7052         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
7053         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
7054         {IWL_PCI_DEVICE(0x423A, PCI_ANY_ID, iwl5350_agn_cfg)},
7055 #endif /* CONFIG_IWL5000 */
7056         {0}
7057 };
7058 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7059
7060 static struct pci_driver iwl_driver = {
7061         .name = DRV_NAME,
7062         .id_table = iwl_hw_card_ids,
7063         .probe = iwl4965_pci_probe,
7064         .remove = __devexit_p(iwl4965_pci_remove),
7065 #ifdef CONFIG_PM
7066         .suspend = iwl4965_pci_suspend,
7067         .resume = iwl4965_pci_resume,
7068 #endif
7069 };
7070
7071 static int __init iwl4965_init(void)
7072 {
7073
7074         int ret;
7075         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7076         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7077
7078         ret = iwl4965_rate_control_register();
7079         if (ret) {
7080                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7081                 return ret;
7082         }
7083
7084         ret = pci_register_driver(&iwl_driver);
7085         if (ret) {
7086                 IWL_ERROR("Unable to initialize PCI module\n");
7087                 goto error_register;
7088         }
7089 #ifdef CONFIG_IWLWIFI_DEBUG
7090         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7091         if (ret) {
7092                 IWL_ERROR("Unable to create driver sysfs file\n");
7093                 goto error_debug;
7094         }
7095 #endif
7096
7097         return ret;
7098
7099 #ifdef CONFIG_IWLWIFI_DEBUG
7100 error_debug:
7101         pci_unregister_driver(&iwl_driver);
7102 #endif
7103 error_register:
7104         iwl4965_rate_control_unregister();
7105         return ret;
7106 }
7107
7108 static void __exit iwl4965_exit(void)
7109 {
7110 #ifdef CONFIG_IWLWIFI_DEBUG
7111         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7112 #endif
7113         pci_unregister_driver(&iwl_driver);
7114         iwl4965_rate_control_unregister();
7115 }
7116
7117 module_exit(iwl4965_exit);
7118 module_init(iwl4965_init);