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 iwl4965_station_entry *station;
 437         unsigned long flags_spin;
 438         DECLARE_MAC_BUF(mac);
 439
 440         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 441         if (is_ap)
 442                 index = IWL_AP_ID;
 443         else if (is_broadcast_ether_addr(addr))
 444                 index = priv->hw_params.bcast_sta_id;
 445         else
 446                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 447                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 448                                                 addr)) {
 449                                 index = i;
 450                                 break;
 451                         }
 452
 453                         if (!priv->stations[i].used &&
 454                             index == IWL_INVALID_STATION)
 455                                 index = i;
 456                 }
 457
 458
 459         /* These two conditions have the same outcome, but keep them separate
 460           since they have different meanings */
 461         if (unlikely(index == IWL_INVALID_STATION)) {
 462                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 463                 return index;
 464         }
 465
 466         if (priv->stations[index].used &&
 467             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 468                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 469                 return index;
 470         }
 471
 472
 473         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 474         station = &priv->stations[index];
 475         station->used = 1;
 476         priv->num_stations++;
 477
 478         /* Set up the REPLY_ADD_STA command to send to device */
 479         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 480         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 481         station->sta.mode = 0;
 482         station->sta.sta.sta_id = index;
 483         station->sta.station_flags = 0;
 484
 485 #ifdef CONFIG_IWL4965_HT
 486         /* BCAST station and IBSS stations do not work in HT mode */
 487         if (index != priv->hw_params.bcast_sta_id &&
 488             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 489                 iwl4965_set_ht_add_station(priv, index,
 490                                  (struct ieee80211_ht_info *) ht_data);
 491 #endif /*CONFIG_IWL4965_HT*/
 492
 493         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 494
 495         /* Add station to device's station table */
 496         iwl4965_send_add_station(priv, &station->sta, flags);
 497         return index;
 498
 499 }
 500
 501
 502
 503 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 504
 505 /**
 506  * iwl4965_enqueue_hcmd - enqueue a uCode command
 507  * @priv: device private data point
 508  * @cmd: a point to the ucode command structure
 509  *
 510  * The function returns < 0 values to indicate the operation is
 511  * failed. On success, it turns the index (> 0) of command in the
 512  * command queue.
 513  */
 514 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 515 {
 516         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 517         struct iwl4965_queue *q = &txq->q;
 518         struct iwl4965_tfd_frame *tfd;
 519         u32 *control_flags;
 520         struct iwl_cmd *out_cmd;
 521         u32 idx;
 522         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 523         dma_addr_t phys_addr;
 524         int ret;
 525         unsigned long flags;
 526
 527         /* If any of the command structures end up being larger than
 528          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 529          * we will need to increase the size of the TFD entries */
 530         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 531                !(cmd->meta.flags & CMD_SIZE_HUGE));
 532
 533         if (iwl_is_rfkill(priv)) {
 534                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 535                 return -EIO;
 536         }
 537
 538         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 539                 IWL_ERROR("No space for Tx\n");
 540                 return -ENOSPC;
 541         }
 542
 543         spin_lock_irqsave(&priv->hcmd_lock, flags);
 544
 545         tfd = &txq->bd[q->write_ptr];
 546         memset(tfd, 0, sizeof(*tfd));
 547
 548         control_flags = (u32 *) tfd;
 549
 550         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 551         out_cmd = &txq->cmd[idx];
 552
 553         out_cmd->hdr.cmd = cmd->id;
 554         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 555         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 556
 557         /* At this point, the out_cmd now has all of the incoming cmd
 558          * information */
 559
 560         out_cmd->hdr.flags = 0;
 561         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 562                         INDEX_TO_SEQ(q->write_ptr));
 563         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 564                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 565
 566         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 567                         offsetof(struct iwl_cmd, hdr);
 568         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 569
 570         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 571                      "%d bytes at %d[%d]:%d\n",
 572                      get_cmd_string(out_cmd->hdr.cmd),
 573                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 574                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 575
 576         txq->need_update = 1;
 577
 578         /* Set up entry in queue's byte count circular buffer */
 579         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
 580
 581         /* Increment and update queue's write index */
 582         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 583         ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
 584
 585         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 586         return ret ? ret : idx;
 587 }
 588
 589 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 590 {
 591         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 592
 593         if (hw_decrypt)
 594                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 595         else
 596                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 597
 598 }
 599
 600 /**
 601  * iwl4965_rxon_add_station - add station into station table.
 602  *
 603  * there is only one AP station with id= IWL_AP_ID
 604  * NOTE: mutex must be held before calling this fnction
 605  */
 606 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 607                                 const u8 *addr, int is_ap)
 608 {
 609         u8 sta_id;
 610
 611         /* Add station to device's station table */
 612 #ifdef CONFIG_IWL4965_HT
 613         struct ieee80211_conf *conf = &priv->hw->conf;
 614         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 615
 616         if ((is_ap) &&
 617             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 618             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 619                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 620                                                    0, cur_ht_config);
 621         else
 622 #endif /* CONFIG_IWL4965_HT */
 623                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 624                                                    0, NULL);
 625
 626         /* Set up default rate scaling table in device's station table */
 627         iwl4965_add_station(priv, addr, is_ap);
 628
 629         return sta_id;
 630 }
 631
 632 /**
 633  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 634  *
 635  * NOTE:  This is really only useful during development and can eventually
 636  * be #ifdef'd out once the driver is stable and folks aren't actively
 637  * making changes
 638  */
 639 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 640 {
 641         int error = 0;
 642         int counter = 1;
 643
 644         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 645                 error |= le32_to_cpu(rxon->flags &
 646                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 647                                  RXON_FLG_RADAR_DETECT_MSK));
 648                 if (error)
 649                         IWL_WARNING("check 24G fields %d | %d\n",
 650                                     counter++, error);
 651         } else {
 652                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 653                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 654                 if (error)
 655                         IWL_WARNING("check 52 fields %d | %d\n",
 656                                     counter++, error);
 657                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 658                 if (error)
 659                         IWL_WARNING("check 52 CCK %d | %d\n",
 660                                     counter++, error);
 661         }
 662         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 663         if (error)
 664                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 665
 666         /* make sure basic rates 6Mbps and 1Mbps are supported */
 667         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 668                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 669         if (error)
 670                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 671
 672         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 673         if (error)
 674                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 675
 676         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 677                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 678         if (error)
 679                 IWL_WARNING("check CCK and short slot %d | %d\n",
 680                             counter++, error);
 681
 682         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 683                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 684         if (error)
 685                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 686                             counter++, error);
 687
 688         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 689                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 690         if (error)
 691                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 692                             counter++, error);
 693
 694         if (error)
 695                 IWL_WARNING("Tuning to channel %d\n",
 696                             le16_to_cpu(rxon->channel));
 697
 698         if (error) {
 699                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 700                 return -1;
 701         }
 702         return 0;
 703 }
 704
 705 /**
 706  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 707  * @priv: staging_rxon is compared to active_rxon
 708  *
 709  * If the RXON structure is changing enough to require a new tune,
 710  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 711  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 712  */
 713 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 714 {
 715
 716         /* These items are only settable from the full RXON command */
 717         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 718             compare_ether_addr(priv->staging_rxon.bssid_addr,
 719                                priv->active_rxon.bssid_addr) ||
 720             compare_ether_addr(priv->staging_rxon.node_addr,
 721                                priv->active_rxon.node_addr) ||
 722             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 723                                priv->active_rxon.wlap_bssid_addr) ||
 724             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 725             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 726             (priv->staging_rxon.air_propagation !=
 727              priv->active_rxon.air_propagation) ||
 728             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 729              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 730             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 731              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 732             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 733             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 734                 return 1;
 735
 736         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 737          * be updated with the RXON_ASSOC command -- however only some
 738          * flag transitions are allowed using RXON_ASSOC */
 739
 740         /* Check if we are not switching bands */
 741         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 742             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 743                 return 1;
 744
 745         /* Check if we are switching association toggle */
 746         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 747                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 748                 return 1;
 749
 750         return 0;
 751 }
 752
 753 /**
 754  * iwl4965_commit_rxon - commit staging_rxon to hardware
 755  *
 756  * The RXON command in staging_rxon is committed to the hardware and
 757  * the active_rxon structure is updated with the new data.  This
 758  * function correctly transitions out of the RXON_ASSOC_MSK state if
 759  * a HW tune is required based on the RXON structure changes.
 760  */
 761 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 762 {
 763         /* cast away the const for active_rxon in this function */
 764         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 765         DECLARE_MAC_BUF(mac);
 766         int rc = 0;
 767
 768         if (!iwl_is_alive(priv))
 769                 return -1;
 770
 771         /* always get timestamp with Rx frame */
 772         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 773
 774         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 775         if (rc) {
 776                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 777                 return -EINVAL;
 778         }
 779
 780         /* If we don't need to send a full RXON, we can use
 781          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 782          * and other flags for the current radio configuration. */
 783         if (!iwl4965_full_rxon_required(priv)) {
 784                 rc = iwl_send_rxon_assoc(priv);
 785                 if (rc) {
 786                         IWL_ERROR("Error setting RXON_ASSOC "
 787                                   "configuration (%d).\n", rc);
 788                         return rc;
 789                 }
 790
 791                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 792
 793                 return 0;
 794         }
 795
 796         /* station table will be cleared */
 797         priv->assoc_station_added = 0;
 798
 799         /* If we are currently associated and the new config requires
 800          * an RXON_ASSOC and the new config wants the associated mask enabled,
 801          * we must clear the associated from the active configuration
 802          * before we apply the new config */
 803         if (iwl_is_associated(priv) &&
 804             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 805                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 806                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 807
 808                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 809                                       sizeof(struct iwl4965_rxon_cmd),
 810                                       &priv->active_rxon);
 811
 812                 /* If the mask clearing failed then we set
 813                  * active_rxon back to what it was previously */
 814                 if (rc) {
 815                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 816                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 817                                   "configuration (%d).\n", rc);
 818                         return rc;
 819                 }
 820         }
 821
 822         IWL_DEBUG_INFO("Sending RXON\n"
 823                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 824                        "* channel = %d\n"
 825                        "* bssid = %s\n",
 826                        ((priv->staging_rxon.filter_flags &
 827                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 828                        le16_to_cpu(priv->staging_rxon.channel),
 829                        print_mac(mac, priv->staging_rxon.bssid_addr));
 830
 831         iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 832         /* Apply the new configuration */
 833         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 834                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
 835         if (rc) {
 836                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 837                 return rc;
 838         }
 839
 840         iwlcore_clear_stations_table(priv);
 841
 842         if (!priv->error_recovering)
 843                 priv->start_calib = 0;
 844
 845         iwl_init_sensitivity(priv);
 846
 847         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 848
 849         /* If we issue a new RXON command which required a tune then we must
 850          * send a new TXPOWER command or we won't be able to Tx any frames */
 851         rc = iwl4965_hw_reg_send_txpower(priv);
 852         if (rc) {
 853                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 854                 return rc;
 855         }
 856
 857         /* Add the broadcast address so we can send broadcast frames */
 858         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
 859             IWL_INVALID_STATION) {
 860                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 861                 return -EIO;
 862         }
 863
 864         /* If we have set the ASSOC_MSK and we are in BSS mode then
 865          * add the IWL_AP_ID to the station rate table */
 866         if (iwl_is_associated(priv) &&
 867             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 868                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 869                     == IWL_INVALID_STATION) {
 870                         IWL_ERROR("Error adding AP address for transmit.\n");
 871                         return -EIO;
 872                 }
 873                 priv->assoc_station_added = 1;
 874                 if (priv->default_wep_key &&
 875                     iwl_send_static_wepkey_cmd(priv, 0))
 876                         IWL_ERROR("Could not send WEP static key.\n");
 877         }
 878
 879         return 0;
 880 }
 881
 882 void iwl4965_update_chain_flags(struct iwl_priv *priv)
 883 {
 884
 885         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 rc = 0;
 906         struct iwl4965_rx_packet *res;
 907         struct iwl_host_cmd cmd = {
 908                 .id = REPLY_SCAN_ABORT_CMD,
 909                 .meta.flags = CMD_WANT_SKB,
 910         };
 911
 912         /* If there isn't a scan actively going on in the hardware
 913          * then we are in between scan bands and not actually
 914          * actively scanning, so don't send the abort command */
 915         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 916                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 917                 return 0;
 918         }
 919
 920         rc = iwl_send_cmd_sync(priv, &cmd);
 921         if (rc) {
 922                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 923                 return rc;
 924         }
 925
 926         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 927         if (res->u.status != CAN_ABORT_STATUS) {
 928                 /* The scan abort will return 1 for success or
 929                  * 2 for "failure".  A failure condition can be
 930                  * due to simply not being in an active scan which
 931                  * can occur if we send the scan abort before we
 932                  * the microcode has notified us that a scan is
 933                  * completed. */
 934                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 935                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 936                 clear_bit(STATUS_SCAN_HW, &priv->status);
 937         }
 938
 939         dev_kfree_skb_any(cmd.meta.u.skb);
 940
 941         return rc;
 942 }
 943
 944 /*
 945  * CARD_STATE_CMD
 946  *
 947  * Use: Sets the device's internal card state to enable, disable, or halt
 948  *
 949  * When in the 'enable' state the card operates as normal.
 950  * When in the 'disable' state, the card enters into a low power mode.
 951  * When in the 'halt' state, the card is shut down and must be fully
 952  * restarted to come back on.
 953  */
 954 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
 955 {
 956         struct iwl_host_cmd cmd = {
 957                 .id = REPLY_CARD_STATE_CMD,
 958                 .len = sizeof(u32),
 959                 .data = &flags,
 960                 .meta.flags = meta_flag,
 961         };
 962
 963         return iwl_send_cmd(priv, &cmd);
 964 }
 965
 966 int iwl4965_send_add_station(struct iwl_priv *priv,
 967                          struct iwl4965_addsta_cmd *sta, u8 flags)
 968 {
 969         struct iwl4965_rx_packet *res = NULL;
 970         int rc = 0;
 971         struct iwl_host_cmd cmd = {
 972                 .id = REPLY_ADD_STA,
 973                 .len = sizeof(struct iwl4965_addsta_cmd),
 974                 .meta.flags = flags,
 975                 .data = sta,
 976         };
 977
 978         if (!(flags & CMD_ASYNC))
 979                 cmd.meta.flags |= CMD_WANT_SKB;
 980
 981         rc = iwl_send_cmd(priv, &cmd);
 982
 983         if (rc || (flags & CMD_ASYNC))
 984                 return rc;
 985
 986         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 987         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 988                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 989                           res->hdr.flags);
 990                 rc = -EIO;
 991         }
 992
 993         if (rc == 0) {
 994                 switch (res->u.add_sta.status) {
 995                 case ADD_STA_SUCCESS_MSK:
 996                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 997                         break;
 998                 default:
 999                         rc = -EIO;
1000                         IWL_WARNING("REPLY_ADD_STA failed\n");
1001                         break;
1002                 }
1003         }
1004
1005         priv->alloc_rxb_skb--;
1006         dev_kfree_skb_any(cmd.meta.u.skb);
1007
1008         return rc;
1009 }
1010
1011 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1012 {
1013         struct list_head *element;
1014
1015         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1016                        priv->frames_count);
1017
1018         while (!list_empty(&priv->free_frames)) {
1019                 element = priv->free_frames.next;
1020                 list_del(element);
1021                 kfree(list_entry(element, struct iwl4965_frame, list));
1022                 priv->frames_count--;
1023         }
1024
1025         if (priv->frames_count) {
1026                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1027                             priv->frames_count);
1028                 priv->frames_count = 0;
1029         }
1030 }
1031
1032 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1033 {
1034         struct iwl4965_frame *frame;
1035         struct list_head *element;
1036         if (list_empty(&priv->free_frames)) {
1037                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1038                 if (!frame) {
1039                         IWL_ERROR("Could not allocate frame!\n");
1040                         return NULL;
1041                 }
1042
1043                 priv->frames_count++;
1044                 return frame;
1045         }
1046
1047         element = priv->free_frames.next;
1048         list_del(element);
1049         return list_entry(element, struct iwl4965_frame, list);
1050 }
1051
1052 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1053 {
1054         memset(frame, 0, sizeof(*frame));
1055         list_add(&frame->list, &priv->free_frames);
1056 }
1057
1058 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1059                                 struct ieee80211_hdr *hdr,
1060                                 const u8 *dest, int left)
1061 {
1062
1063         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1064             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1065              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1066                 return 0;
1067
1068         if (priv->ibss_beacon->len > left)
1069                 return 0;
1070
1071         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1072
1073         return priv->ibss_beacon->len;
1074 }
1075
1076 static u8 iwl4965_rate_get_lowest_plcp(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 iwl4965_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 iwl4965_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 iwl4965_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         tx_sta->status.queue_length = 0;
2526         tx_sta->status.queue_number = 0;
2527
2528         if (in_interrupt())
2529                 ieee80211_tx_status_irqsafe(priv->hw,
2530                                             tx_sta->skb[0], &(tx_sta->status));
2531         else
2532                 ieee80211_tx_status(priv->hw,
2533                                     tx_sta->skb[0], &(tx_sta->status));
2534
2535         tx_sta->skb[0] = NULL;
2536 }
2537
2538 /**
2539  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2540  *
2541  * When FW advances 'R' index, all entries between old and new 'R' index
2542  * need to be reclaimed. As result, some free space forms.  If there is
2543  * enough free space (> low mark), wake the stack that feeds us.
2544  */
2545 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2546 {
2547         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2548         struct iwl4965_queue *q = &txq->q;
2549         int nfreed = 0;
2550
2551         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2552                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2553                           "is out of range [0-%d] %d %d.\n", txq_id,
2554                           index, q->n_bd, q->write_ptr, q->read_ptr);
2555                 return 0;
2556         }
2557
2558         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2559                 q->read_ptr != index;
2560                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2561                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2562                         iwl4965_txstatus_to_ieee(priv,
2563                                         &(txq->txb[txq->q.read_ptr]));
2564                         iwl4965_hw_txq_free_tfd(priv, txq);
2565                 } else if (nfreed > 1) {
2566                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2567                                         q->write_ptr, q->read_ptr);
2568                         queue_work(priv->workqueue, &priv->restart);
2569                 }
2570                 nfreed++;
2571         }
2572
2573 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2574                         (txq_id != IWL_CMD_QUEUE_NUM) &&
2575                         priv->mac80211_registered)
2576                 ieee80211_wake_queue(priv->hw, txq_id); */
2577
2578
2579         return nfreed;
2580 }
2581
2582 static int iwl4965_is_tx_success(u32 status)
2583 {
2584         status &= TX_STATUS_MSK;
2585         return (status == TX_STATUS_SUCCESS)
2586             || (status == TX_STATUS_DIRECT_DONE);
2587 }
2588
2589 /******************************************************************************
2590  *
2591  * Generic RX handler implementations
2592  *
2593  ******************************************************************************/
2594 #ifdef CONFIG_IWL4965_HT
2595
2596 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2597                                     struct ieee80211_hdr *hdr)
2598 {
2599         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2600                 return IWL_AP_ID;
2601         else {
2602                 u8 *da = ieee80211_get_DA(hdr);
2603                 return iwl_find_station(priv, da);
2604         }
2605 }
2606
2607 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2608         struct iwl_priv *priv, int txq_id, int idx)
2609 {
2610         if (priv->txq[txq_id].txb[idx].skb[0])
2611                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2612                                 txb[idx].skb[0]->data;
2613         return NULL;
2614 }
2615
2616 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2617 {
2618         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2619                                 tx_resp->frame_count);
2620         return le32_to_cpu(*scd_ssn) & MAX_SN;
2621
2622 }
2623
2624 /**
2625  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2626  */
2627 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2628                                       struct iwl4965_ht_agg *agg,
2629                                       struct iwl4965_tx_resp_agg *tx_resp,
2630                                       u16 start_idx)
2631 {
2632         u16 status;
2633         struct agg_tx_status *frame_status = &tx_resp->status;
2634         struct ieee80211_tx_status *tx_status = NULL;
2635         struct ieee80211_hdr *hdr = NULL;
2636         int i, sh;
2637         int txq_id, idx;
2638         u16 seq;
2639
2640         if (agg->wait_for_ba)
2641                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2642
2643         agg->frame_count = tx_resp->frame_count;
2644         agg->start_idx = start_idx;
2645         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2646         agg->bitmap = 0;
2647
2648         /* # frames attempted by Tx command */
2649         if (agg->frame_count == 1) {
2650                 /* Only one frame was attempted; no block-ack will arrive */
2651                 status = le16_to_cpu(frame_status[0].status);
2652                 seq  = le16_to_cpu(frame_status[0].sequence);
2653                 idx = SEQ_TO_INDEX(seq);
2654                 txq_id = SEQ_TO_QUEUE(seq);
2655
2656                 /* FIXME: code repetition */
2657                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2658                                    agg->frame_count, agg->start_idx, idx);
2659
2660                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2661                 tx_status->retry_count = tx_resp->failure_frame;
2662                 tx_status->queue_number = status & 0xff;
2663                 tx_status->queue_length = tx_resp->failure_rts;
2664                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2665                 tx_status->flags = iwl4965_is_tx_success(status)?
2666                         IEEE80211_TX_STATUS_ACK : 0;
2667                 iwl4965_hwrate_to_tx_control(priv,
2668                                              le32_to_cpu(tx_resp->rate_n_flags),
2669                                              &tx_status->control);
2670                 /* FIXME: code repetition end */
2671
2672                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2673                                     status & 0xff, tx_resp->failure_frame);
2674                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2675                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2676
2677                 agg->wait_for_ba = 0;
2678         } else {
2679                 /* Two or more frames were attempted; expect block-ack */
2680                 u64 bitmap = 0;
2681                 int start = agg->start_idx;
2682
2683                 /* Construct bit-map of pending frames within Tx window */
2684                 for (i = 0; i < agg->frame_count; i++) {
2685                         u16 sc;
2686                         status = le16_to_cpu(frame_status[i].status);
2687                         seq  = le16_to_cpu(frame_status[i].sequence);
2688                         idx = SEQ_TO_INDEX(seq);
2689                         txq_id = SEQ_TO_QUEUE(seq);
2690
2691                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2692                                       AGG_TX_STATE_ABORT_MSK))
2693                                 continue;
2694
2695                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2696                                            agg->frame_count, txq_id, idx);
2697
2698                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2699
2700                         sc = le16_to_cpu(hdr->seq_ctrl);
2701                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2702                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2703                                           " idx=%d, seq_idx=%d, seq=%d\n",
2704                                           idx, SEQ_TO_SN(sc),
2705                                           hdr->seq_ctrl);
2706                                 return -1;
2707                         }
2708
2709                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2710                                            i, idx, SEQ_TO_SN(sc));
2711
2712                         sh = idx - start;
2713                         if (sh > 64) {
2714                                 sh = (start - idx) + 0xff;
2715                                 bitmap = bitmap << sh;
2716                                 sh = 0;
2717                                 start = idx;
2718                         } else if (sh < -64)
2719                                 sh  = 0xff - (start - idx);
2720                         else if (sh < 0) {
2721                                 sh = start - idx;
2722                                 start = idx;
2723                                 bitmap = bitmap << sh;
2724                                 sh = 0;
2725                         }
2726                         bitmap |= (1 << sh);
2727                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2728                                            start, (u32)(bitmap & 0xFFFFFFFF));
2729                 }
2730
2731                 agg->bitmap = bitmap;
2732                 agg->start_idx = start;
2733                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2734                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2735                                    agg->frame_count, agg->start_idx,
2736                                    (unsigned long long)agg->bitmap);
2737
2738                 if (bitmap)
2739                         agg->wait_for_ba = 1;
2740         }
2741         return 0;
2742 }
2743 #endif
2744
2745 /**
2746  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2747  */
2748 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2749                             struct iwl4965_rx_mem_buffer *rxb)
2750 {
2751         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2752         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2753         int txq_id = SEQ_TO_QUEUE(sequence);
2754         int index = SEQ_TO_INDEX(sequence);
2755         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2756         struct ieee80211_tx_status *tx_status;
2757         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2758         u32  status = le32_to_cpu(tx_resp->status);
2759 #ifdef CONFIG_IWL4965_HT
2760         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2761         struct ieee80211_hdr *hdr;
2762         __le16 *qc;
2763 #endif
2764
2765         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2766                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2767                           "is out of range [0-%d] %d %d\n", txq_id,
2768                           index, txq->q.n_bd, txq->q.write_ptr,
2769                           txq->q.read_ptr);
2770                 return;
2771         }
2772
2773 #ifdef CONFIG_IWL4965_HT
2774         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2775         qc = ieee80211_get_qos_ctrl(hdr);
2776
2777         if (qc)
2778                 tid = le16_to_cpu(*qc) & 0xf;
2779
2780         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2781         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2782                 IWL_ERROR("Station not known\n");
2783                 return;
2784         }
2785
2786         if (txq->sched_retry) {
2787                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2788                 struct iwl4965_ht_agg *agg = NULL;
2789
2790                 if (!qc)
2791                         return;
2792
2793                 agg = &priv->stations[sta_id].tid[tid].agg;
2794
2795                 iwl4965_tx_status_reply_tx(priv, agg,
2796                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2797
2798                 if ((tx_resp->frame_count == 1) &&
2799                     !iwl4965_is_tx_success(status)) {
2800                         /* TODO: send BAR */
2801                 }
2802
2803                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2804                         int freed;
2805                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2806                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2807                                            "%d index %d\n", scd_ssn , index);
2808                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2809                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2810
2811                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2812                             txq_id >= 0 && priv->mac80211_registered &&
2813                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2814                                 ieee80211_wake_queue(priv->hw, txq_id);
2815
2816                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2817                 }
2818         } else {
2819 #endif /* CONFIG_IWL4965_HT */
2820         tx_status = &(txq->txb[txq->q.read_ptr].status);
2821
2822         tx_status->retry_count = tx_resp->failure_frame;
2823         tx_status->queue_number = status;
2824         tx_status->queue_length = tx_resp->bt_kill_count;
2825         tx_status->queue_length |= tx_resp->failure_rts;
2826         tx_status->flags =
2827             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2828         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2829                                      &tx_status->control);
2830
2831         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2832                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2833                      status, le32_to_cpu(tx_resp->rate_n_flags),
2834                      tx_resp->failure_frame);
2835
2836         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2837         if (index != -1) {
2838                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2839 #ifdef CONFIG_IWL4965_HT
2840                 if (tid != MAX_TID_COUNT)
2841                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2842                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2843                         (txq_id >= 0) &&
2844                         priv->mac80211_registered)
2845                         ieee80211_wake_queue(priv->hw, txq_id);
2846                 if (tid != MAX_TID_COUNT)
2847                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2848 #endif
2849         }
2850 #ifdef CONFIG_IWL4965_HT
2851         }
2852 #endif /* CONFIG_IWL4965_HT */
2853
2854         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2855                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2856 }
2857
2858
2859 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2860                                struct iwl4965_rx_mem_buffer *rxb)
2861 {
2862         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2863         struct iwl4965_alive_resp *palive;
2864         struct delayed_work *pwork;
2865
2866         palive = &pkt->u.alive_frame;
2867
2868         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2869                        "0x%01X 0x%01X\n",
2870                        palive->is_valid, palive->ver_type,
2871                        palive->ver_subtype);
2872
2873         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2874                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2875                 memcpy(&priv->card_alive_init,
2876                        &pkt->u.alive_frame,
2877                        sizeof(struct iwl4965_init_alive_resp));
2878                 pwork = &priv->init_alive_start;
2879         } else {
2880                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2881                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2882                        sizeof(struct iwl4965_alive_resp));
2883                 pwork = &priv->alive_start;
2884         }
2885
2886         /* We delay the ALIVE response by 5ms to
2887          * give the HW RF Kill time to activate... */
2888         if (palive->is_valid == UCODE_VALID_OK)
2889                 queue_delayed_work(priv->workqueue, pwork,
2890                                    msecs_to_jiffies(5));
2891         else
2892                 IWL_WARNING("uCode did not respond OK.\n");
2893 }
2894
2895 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2896                                  struct iwl4965_rx_mem_buffer *rxb)
2897 {
2898         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2899
2900         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2901         return;
2902 }
2903
2904 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2905                                struct iwl4965_rx_mem_buffer *rxb)
2906 {
2907         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2908
2909         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2910                 "seq 0x%04X ser 0x%08X\n",
2911                 le32_to_cpu(pkt->u.err_resp.error_type),
2912                 get_cmd_string(pkt->u.err_resp.cmd_id),
2913                 pkt->u.err_resp.cmd_id,
2914                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2915                 le32_to_cpu(pkt->u.err_resp.error_info));
2916 }
2917
2918 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2919
2920 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
2921 {
2922         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2923         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2924         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2925         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2926                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2927         rxon->channel = csa->channel;
2928         priv->staging_rxon.channel = csa->channel;
2929 }
2930
2931 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2932                                           struct iwl4965_rx_mem_buffer *rxb)
2933 {
2934 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2935         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2936         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2937
2938         if (!report->state) {
2939                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2940                           "Spectrum Measure Notification: Start\n");
2941                 return;
2942         }
2943
2944         memcpy(&priv->measure_report, report, sizeof(*report));
2945         priv->measurement_status |= MEASUREMENT_READY;
2946 #endif
2947 }
2948
2949 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2950                                   struct iwl4965_rx_mem_buffer *rxb)
2951 {
2952 #ifdef CONFIG_IWLWIFI_DEBUG
2953         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2954         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2955         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2956                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2957 #endif
2958 }
2959
2960 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2961                                              struct iwl4965_rx_mem_buffer *rxb)
2962 {
2963         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2964         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2965                         "notification for %s:\n",
2966                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2967         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2968 }
2969
2970 static void iwl4965_bg_beacon_update(struct work_struct *work)
2971 {
2972         struct iwl_priv *priv =
2973                 container_of(work, struct iwl_priv, beacon_update);
2974         struct sk_buff *beacon;
2975
2976         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2977         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2978
2979         if (!beacon) {
2980                 IWL_ERROR("update beacon failed\n");
2981                 return;
2982         }
2983
2984         mutex_lock(&priv->mutex);
2985         /* new beacon skb is allocated every time; dispose previous.*/
2986         if (priv->ibss_beacon)
2987                 dev_kfree_skb(priv->ibss_beacon);
2988
2989         priv->ibss_beacon = beacon;
2990         mutex_unlock(&priv->mutex);
2991
2992         iwl4965_send_beacon_cmd(priv);
2993 }
2994
2995 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2996                                 struct iwl4965_rx_mem_buffer *rxb)
2997 {
2998 #ifdef CONFIG_IWLWIFI_DEBUG
2999         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3000         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3001         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3002
3003         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3004                 "tsf %d %d rate %d\n",
3005                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3006                 beacon->beacon_notify_hdr.failure_frame,
3007                 le32_to_cpu(beacon->ibss_mgr_status),
3008                 le32_to_cpu(beacon->high_tsf),
3009                 le32_to_cpu(beacon->low_tsf), rate);
3010 #endif
3011
3012         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3013             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3014                 queue_work(priv->workqueue, &priv->beacon_update);
3015 }
3016
3017 /* Service response to REPLY_SCAN_CMD (0x80) */
3018 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3019                               struct iwl4965_rx_mem_buffer *rxb)
3020 {
3021 #ifdef CONFIG_IWLWIFI_DEBUG
3022         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3023         struct iwl4965_scanreq_notification *notif =
3024             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3025
3026         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3027 #endif
3028 }
3029
3030 /* Service SCAN_START_NOTIFICATION (0x82) */
3031 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3032                                     struct iwl4965_rx_mem_buffer *rxb)
3033 {
3034         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3035         struct iwl4965_scanstart_notification *notif =
3036             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3037         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3038         IWL_DEBUG_SCAN("Scan start: "
3039                        "%d [802.11%s] "
3040                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3041                        notif->channel,
3042                        notif->band ? "bg" : "a",
3043                        notif->tsf_high,
3044                        notif->tsf_low, notif->status, notif->beacon_timer);
3045 }
3046
3047 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3048 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3049                                       struct iwl4965_rx_mem_buffer *rxb)
3050 {
3051         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3052         struct iwl4965_scanresults_notification *notif =
3053             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3054
3055         IWL_DEBUG_SCAN("Scan ch.res: "
3056                        "%d [802.11%s] "
3057                        "(TSF: 0x%08X:%08X) - %d "
3058                        "elapsed=%lu usec (%dms since last)\n",
3059                        notif->channel,
3060                        notif->band ? "bg" : "a",
3061                        le32_to_cpu(notif->tsf_high),
3062                        le32_to_cpu(notif->tsf_low),
3063                        le32_to_cpu(notif->statistics[0]),
3064                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3065                        jiffies_to_msecs(elapsed_jiffies
3066                                         (priv->last_scan_jiffies, jiffies)));
3067
3068         priv->last_scan_jiffies = jiffies;
3069         priv->next_scan_jiffies = 0;
3070 }
3071
3072 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3073 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3074                                        struct iwl4965_rx_mem_buffer *rxb)
3075 {
3076         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3077         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3078
3079         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3080                        scan_notif->scanned_channels,
3081                        scan_notif->tsf_low,
3082                        scan_notif->tsf_high, scan_notif->status);
3083
3084         /* The HW is no longer scanning */
3085         clear_bit(STATUS_SCAN_HW, &priv->status);
3086
3087         /* The scan completion notification came in, so kill that timer... */
3088         cancel_delayed_work(&priv->scan_check);
3089
3090         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3091                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3092                        jiffies_to_msecs(elapsed_jiffies
3093                                         (priv->scan_pass_start, jiffies)));
3094
3095         /* Remove this scanned band from the list
3096          * of pending bands to scan */
3097         priv->scan_bands--;
3098
3099         /* If a request to abort was given, or the scan did not succeed
3100          * then we reset the scan state machine and terminate,
3101          * re-queuing another scan if one has been requested */
3102         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3103                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3104                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3105         } else {
3106                 /* If there are more bands on this scan pass reschedule */
3107                 if (priv->scan_bands > 0)
3108                         goto reschedule;
3109         }
3110
3111         priv->last_scan_jiffies = jiffies;
3112         priv->next_scan_jiffies = 0;
3113         IWL_DEBUG_INFO("Setting scan to off\n");
3114
3115         clear_bit(STATUS_SCANNING, &priv->status);
3116
3117         IWL_DEBUG_INFO("Scan took %dms\n",
3118                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3119
3120         queue_work(priv->workqueue, &priv->scan_completed);
3121
3122         return;
3123
3124 reschedule:
3125         priv->scan_pass_start = jiffies;
3126         queue_work(priv->workqueue, &priv->request_scan);
3127 }
3128
3129 /* Handle notification from uCode that card's power state is changing
3130  * due to software, hardware, or critical temperature RFKILL */
3131 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3132                                     struct iwl4965_rx_mem_buffer *rxb)
3133 {
3134         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3135         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3136         unsigned long status = priv->status;
3137
3138         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3139                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3140                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3141
3142         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3143                      RF_CARD_DISABLED)) {
3144
3145                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3146                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3147
3148                 if (!iwl_grab_nic_access(priv)) {
3149                         iwl_write_direct32(
3150                                 priv, HBUS_TARG_MBX_C,
3151                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3152
3153                         iwl_release_nic_access(priv);
3154                 }
3155
3156                 if (!(flags & RXON_CARD_DISABLED)) {
3157                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3158                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3159                         if (!iwl_grab_nic_access(priv)) {
3160                                 iwl_write_direct32(
3161                                         priv, HBUS_TARG_MBX_C,
3162                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3163
3164                                 iwl_release_nic_access(priv);
3165                         }
3166                 }
3167
3168                 if (flags & RF_CARD_DISABLED) {
3169                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3170                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3171                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3172                         if (!iwl_grab_nic_access(priv))
3173                                 iwl_release_nic_access(priv);
3174                 }
3175         }
3176
3177         if (flags & HW_CARD_DISABLED)
3178                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3179         else
3180                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3181
3182
3183         if (flags & SW_CARD_DISABLED)
3184                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3185         else
3186                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3187
3188         if (!(flags & RXON_CARD_DISABLED))
3189                 iwl4965_scan_cancel(priv);
3190
3191         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3192              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3193             (test_bit(STATUS_RF_KILL_SW, &status) !=
3194              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3195                 queue_work(priv->workqueue, &priv->rf_kill);
3196         else
3197                 wake_up_interruptible(&priv->wait_command_queue);
3198 }
3199
3200 /**
3201  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3202  *
3203  * Setup the RX handlers for each of the reply types sent from the uCode
3204  * to the host.
3205  *
3206  * This function chains into the hardware specific files for them to setup
3207  * any hardware specific handlers as well.
3208  */
3209 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3210 {
3211         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3212         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3213         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3214         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3215         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3216             iwl4965_rx_spectrum_measure_notif;
3217         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3218         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3219             iwl4965_rx_pm_debug_statistics_notif;
3220         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3221
3222         /*
3223          * The same handler is used for both the REPLY to a discrete
3224          * statistics request from the host as well as for the periodic
3225          * statistics notifications (after received beacons) from the uCode.
3226          */
3227         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3228         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3229
3230         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3231         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3232         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3233             iwl4965_rx_scan_results_notif;
3234         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3235             iwl4965_rx_scan_complete_notif;
3236         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3237         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3238
3239         /* Set up hardware specific Rx handlers */
3240         priv->cfg->ops->lib->rx_handler_setup(priv);
3241 }
3242
3243 /**
3244  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3245  * @rxb: Rx buffer to reclaim
3246  *
3247  * If an Rx buffer has an async callback associated with it the callback
3248  * will be executed.  The attached skb (if present) will only be freed
3249  * if the callback returns 1
3250  */
3251 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3252                                 struct iwl4965_rx_mem_buffer *rxb)
3253 {
3254         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3255         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3256         int txq_id = SEQ_TO_QUEUE(sequence);
3257         int index = SEQ_TO_INDEX(sequence);
3258         int huge = sequence & SEQ_HUGE_FRAME;
3259         int cmd_index;
3260         struct iwl_cmd *cmd;
3261
3262         /* If a Tx command is being handled and it isn't in the actual
3263          * command queue then there a command routing bug has been introduced
3264          * in the queue management code. */
3265         if (txq_id != IWL_CMD_QUEUE_NUM)
3266                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3267                           txq_id, pkt->hdr.cmd);
3268         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3269
3270         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3271         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3272
3273         /* Input error checking is done when commands are added to queue. */
3274         if (cmd->meta.flags & CMD_WANT_SKB) {
3275                 cmd->meta.source->u.skb = rxb->skb;
3276                 rxb->skb = NULL;
3277         } else if (cmd->meta.u.callback &&
3278                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3279                 rxb->skb = NULL;
3280
3281         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3282
3283         if (!(cmd->meta.flags & CMD_ASYNC)) {
3284                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3285                 wake_up_interruptible(&priv->wait_command_queue);
3286         }
3287 }
3288
3289 /************************** RX-FUNCTIONS ****************************/
3290 /*
3291  * Rx theory of operation
3292  *
3293  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3294  * each of which point to Receive Buffers to be filled by 4965.  These get
3295  * used not only for Rx frames, but for any command response or notification
3296  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3297  * of indexes into the circular buffer.
3298  *
3299  * Rx Queue Indexes
3300  * The host/firmware share two index registers for managing the Rx buffers.
3301  *
3302  * The READ index maps to the first position that the firmware may be writing
3303  * to -- the driver can read up to (but not including) this position and get
3304  * good data.
3305  * The READ index is managed by the firmware once the card is enabled.
3306  *
3307  * The WRITE index maps to the last position the driver has read from -- the
3308  * position preceding WRITE is the last slot the firmware can place a packet.
3309  *
3310  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3311  * WRITE = READ.
3312  *
3313  * During initialization, the host sets up the READ queue position to the first
3314  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3315  *
3316  * When the firmware places a packet in a buffer, it will advance the READ index
3317  * and fire the RX interrupt.  The driver can then query the READ index and
3318  * process as many packets as possible, moving the WRITE index forward as it
3319  * resets the Rx queue buffers with new memory.
3320  *
3321  * The management in the driver is as follows:
3322  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3323  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3324  *   to replenish the iwl->rxq->rx_free.
3325  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3326  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3327  *   'processed' and 'read' driver indexes as well)
3328  * + A received packet is processed and handed to the kernel network stack,
3329  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3330  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3331  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3332  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3333  *   were enough free buffers and RX_STALLED is set it is cleared.
3334  *
3335  *
3336  * Driver sequence:
3337  *
3338  * iwl4965_rx_queue_alloc()   Allocates rx_free
3339  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3340  *                            iwl4965_rx_queue_restock
3341  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3342  *                            queue, updates firmware pointers, and updates
3343  *                            the WRITE index.  If insufficient rx_free buffers
3344  *                            are available, schedules iwl4965_rx_replenish
3345  *
3346  * -- enable interrupts --
3347  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3348  *                            READ INDEX, detaching the SKB from the pool.
3349  *                            Moves the packet buffer from queue to rx_used.
3350  *                            Calls iwl4965_rx_queue_restock to refill any empty
3351  *                            slots.
3352  * ...
3353  *
3354  */
3355
3356 /**
3357  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3358  */
3359 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3360 {
3361         int s = q->read - q->write;
3362         if (s <= 0)
3363                 s += RX_QUEUE_SIZE;
3364         /* keep some buffer to not confuse full and empty queue */
3365         s -= 2;
3366         if (s < 0)
3367                 s = 0;
3368         return s;
3369 }
3370
3371 /**
3372  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3373  */
3374 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3375 {
3376         u32 reg = 0;
3377         int rc = 0;
3378         unsigned long flags;
3379
3380         spin_lock_irqsave(&q->lock, flags);
3381
3382         if (q->need_update == 0)
3383                 goto exit_unlock;
3384
3385         /* If power-saving is in use, make sure device is awake */
3386         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3387                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3388
3389                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3390                         iwl_set_bit(priv, CSR_GP_CNTRL,
3391                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3392                         goto exit_unlock;
3393                 }
3394
3395                 rc = iwl_grab_nic_access(priv);
3396                 if (rc)
3397                         goto exit_unlock;
3398
3399                 /* Device expects a multiple of 8 */
3400                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3401                                      q->write & ~0x7);
3402                 iwl_release_nic_access(priv);
3403
3404         /* Else device is assumed to be awake */
3405         } else
3406                 /* Device expects a multiple of 8 */
3407                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3408
3409
3410         q->need_update = 0;
3411
3412  exit_unlock:
3413         spin_unlock_irqrestore(&q->lock, flags);
3414         return rc;
3415 }
3416
3417 /**
3418  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3419  */
3420 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3421                                           dma_addr_t dma_addr)
3422 {
3423         return cpu_to_le32((u32)(dma_addr >> 8));
3424 }
3425
3426
3427 /**
3428  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3429  *
3430  * If there are slots in the RX queue that need to be restocked,
3431  * and we have free pre-allocated buffers, fill the ranks as much
3432  * as we can, pulling from rx_free.
3433  *
3434  * This moves the 'write' index forward to catch up with 'processed', and
3435  * also updates the memory address in the firmware to reference the new
3436  * target buffer.
3437  */
3438 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3439 {
3440         struct iwl4965_rx_queue *rxq = &priv->rxq;
3441         struct list_head *element;
3442         struct iwl4965_rx_mem_buffer *rxb;
3443         unsigned long flags;
3444         int write, rc;
3445
3446         spin_lock_irqsave(&rxq->lock, flags);
3447         write = rxq->write & ~0x7;
3448         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3449                 /* Get next free Rx buffer, remove from free list */
3450                 element = rxq->rx_free.next;
3451                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3452                 list_del(element);
3453
3454                 /* Point to Rx buffer via next RBD in circular buffer */
3455                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3456                 rxq->queue[rxq->write] = rxb;
3457                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3458                 rxq->free_count--;
3459         }
3460         spin_unlock_irqrestore(&rxq->lock, flags);
3461         /* If the pre-allocated buffer pool is dropping low, schedule to
3462          * refill it */
3463         if (rxq->free_count <= RX_LOW_WATERMARK)
3464                 queue_work(priv->workqueue, &priv->rx_replenish);
3465
3466
3467         /* If we've added more space for the firmware to place data, tell it.
3468          * Increment device's write pointer in multiples of 8. */
3469         if ((write != (rxq->write & ~0x7))
3470             || (abs(rxq->write - rxq->read) > 7)) {
3471                 spin_lock_irqsave(&rxq->lock, flags);
3472                 rxq->need_update = 1;
3473                 spin_unlock_irqrestore(&rxq->lock, flags);
3474                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3475                 if (rc)
3476                         return rc;
3477         }
3478
3479         return 0;
3480 }
3481
3482 /**
3483  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3484  *
3485  * When moving to rx_free an SKB is allocated for the slot.
3486  *
3487  * Also restock the Rx queue via iwl4965_rx_queue_restock.
3488  * This is called as a scheduled work item (except for during initialization)
3489  */
3490 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3491 {
3492         struct iwl4965_rx_queue *rxq = &priv->rxq;
3493         struct list_head *element;
3494         struct iwl4965_rx_mem_buffer *rxb;
3495         unsigned long flags;
3496         spin_lock_irqsave(&rxq->lock, flags);
3497         while (!list_empty(&rxq->rx_used)) {
3498                 element = rxq->rx_used.next;
3499                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3500
3501                 /* Alloc a new receive buffer */
3502                 rxb->skb =
3503                     alloc_skb(priv->hw_params.rx_buf_size,
3504                                 __GFP_NOWARN | GFP_ATOMIC);
3505                 if (!rxb->skb) {
3506                         if (net_ratelimit())
3507                                 printk(KERN_CRIT DRV_NAME
3508                                        ": Can not allocate SKB buffers\n");
3509                         /* We don't reschedule replenish work here -- we will
3510                          * call the restock method and if it still needs
3511                          * more buffers it will schedule replenish */
3512                         break;
3513                 }
3514                 priv->alloc_rxb_skb++;
3515                 list_del(element);
3516
3517                 /* Get physical address of RB/SKB */
3518                 rxb->dma_addr =
3519                     pci_map_single(priv->pci_dev, rxb->skb->data,
3520                            priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3521                 list_add_tail(&rxb->list, &rxq->rx_free);
3522                 rxq->free_count++;
3523         }
3524         spin_unlock_irqrestore(&rxq->lock, flags);
3525 }
3526
3527 /*
3528  * this should be called while priv->lock is locked
3529 */
3530 static void __iwl4965_rx_replenish(void *data)
3531 {
3532         struct iwl_priv *priv = data;
3533
3534         iwl4965_rx_allocate(priv);
3535         iwl4965_rx_queue_restock(priv);
3536 }
3537
3538
3539 void iwl4965_rx_replenish(void *data)
3540 {
3541         struct iwl_priv *priv = data;
3542         unsigned long flags;
3543
3544         iwl4965_rx_allocate(priv);
3545
3546         spin_lock_irqsave(&priv->lock, flags);
3547         iwl4965_rx_queue_restock(priv);
3548         spin_unlock_irqrestore(&priv->lock, flags);
3549 }
3550
3551 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3552  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3553  * This free routine walks the list of POOL entries and if SKB is set to
3554  * non NULL it is unmapped and freed
3555  */
3556 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3557 {
3558         int i;
3559         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3560                 if (rxq->pool[i].skb != NULL) {
3561                         pci_unmap_single(priv->pci_dev,
3562                                          rxq->pool[i].dma_addr,
3563                                          priv->hw_params.rx_buf_size,
3564                                          PCI_DMA_FROMDEVICE);
3565                         dev_kfree_skb(rxq->pool[i].skb);
3566                 }
3567         }
3568
3569         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3570                             rxq->dma_addr);
3571         rxq->bd = NULL;
3572 }
3573
3574 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3575 {
3576         struct iwl4965_rx_queue *rxq = &priv->rxq;
3577         struct pci_dev *dev = priv->pci_dev;
3578         int i;
3579
3580         spin_lock_init(&rxq->lock);
3581         INIT_LIST_HEAD(&rxq->rx_free);
3582         INIT_LIST_HEAD(&rxq->rx_used);
3583
3584         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3585         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3586         if (!rxq->bd)
3587                 return -ENOMEM;
3588
3589         /* Fill the rx_used queue with _all_ of the Rx buffers */
3590         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3591                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3592
3593         /* Set us so that we have processed and used all buffers, but have
3594          * not restocked the Rx queue with fresh buffers */
3595         rxq->read = rxq->write = 0;
3596         rxq->free_count = 0;
3597         rxq->need_update = 0;
3598         return 0;
3599 }
3600
3601 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3602 {
3603         unsigned long flags;
3604         int i;
3605         spin_lock_irqsave(&rxq->lock, flags);
3606         INIT_LIST_HEAD(&rxq->rx_free);
3607         INIT_LIST_HEAD(&rxq->rx_used);
3608         /* Fill the rx_used queue with _all_ of the Rx buffers */
3609         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3610                 /* In the reset function, these buffers may have been allocated
3611                  * to an SKB, so we need to unmap and free potential storage */
3612                 if (rxq->pool[i].skb != NULL) {
3613                         pci_unmap_single(priv->pci_dev,
3614                                          rxq->pool[i].dma_addr,
3615                                          priv->hw_params.rx_buf_size,
3616                                          PCI_DMA_FROMDEVICE);
3617                         priv->alloc_rxb_skb--;
3618                         dev_kfree_skb(rxq->pool[i].skb);
3619                         rxq->pool[i].skb = NULL;
3620                 }
3621                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3622         }
3623
3624         /* Set us so that we have processed and used all buffers, but have
3625          * not restocked the Rx queue with fresh buffers */
3626         rxq->read = rxq->write = 0;
3627         rxq->free_count = 0;
3628         spin_unlock_irqrestore(&rxq->lock, flags);
3629 }
3630
3631 /* Convert linear signal-to-noise ratio into dB */
3632 static u8 ratio2dB[100] = {
3633 /*       0   1   2   3   4   5   6   7   8   9 */
3634          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3635         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3636         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3637         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3638         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3639         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3640         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3641         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3642         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3643         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3644 };
3645
3646 /* Calculates a relative dB value from a ratio of linear
3647  *   (i.e. not dB) signal levels.
3648  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3649 int iwl4965_calc_db_from_ratio(int sig_ratio)
3650 {
3651         /* 1000:1 or higher just report as 60 dB */
3652         if (sig_ratio >= 1000)
3653                 return 60;
3654
3655         /* 100:1 or higher, divide by 10 and use table,
3656          *   add 20 dB to make up for divide by 10 */
3657         if (sig_ratio >= 100)
3658                 return (20 + (int)ratio2dB[sig_ratio/10]);
3659
3660         /* We shouldn't see this */
3661         if (sig_ratio < 1)
3662                 return 0;
3663
3664         /* Use table for ratios 1:1 - 99:1 */
3665         return (int)ratio2dB[sig_ratio];
3666 }
3667
3668 #define PERFECT_RSSI (-20) /* dBm */
3669 #define WORST_RSSI (-95)   /* dBm */
3670 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3671
3672 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3673  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3674  *   about formulas used below. */
3675 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3676 {
3677         int sig_qual;
3678         int degradation = PERFECT_RSSI - rssi_dbm;
3679
3680         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3681          * as indicator; formula is (signal dbm - noise dbm).
3682          * SNR at or above 40 is a great signal (100%).
3683          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3684          * Weakest usable signal is usually 10 - 15 dB SNR. */
3685         if (noise_dbm) {
3686                 if (rssi_dbm - noise_dbm >= 40)
3687                         return 100;
3688                 else if (rssi_dbm < noise_dbm)
3689                         return 0;
3690                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3691
3692         /* Else use just the signal level.
3693          * This formula is a least squares fit of data points collected and
3694          *   compared with a reference system that had a percentage (%) display
3695          *   for signal quality. */
3696         } else
3697                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3698                             (15 * RSSI_RANGE + 62 * degradation)) /
3699                            (RSSI_RANGE * RSSI_RANGE);
3700
3701         if (sig_qual > 100)
3702                 sig_qual = 100;
3703         else if (sig_qual < 1)
3704                 sig_qual = 0;
3705
3706         return sig_qual;
3707 }
3708
3709 /**
3710  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3711  *
3712  * Uses the priv->rx_handlers callback function array to invoke
3713  * the appropriate handlers, including command responses,
3714  * frame-received notifications, and other notifications.
3715  */
3716 static void iwl4965_rx_handle(struct iwl_priv *priv)
3717 {
3718         struct iwl4965_rx_mem_buffer *rxb;
3719         struct iwl4965_rx_packet *pkt;
3720         struct iwl4965_rx_queue *rxq = &priv->rxq;
3721         u32 r, i;
3722         int reclaim;
3723         unsigned long flags;
3724         u8 fill_rx = 0;
3725         u32 count = 8;
3726
3727         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3728          * buffer that the driver may process (last buffer filled by ucode). */
3729         r = iwl4965_hw_get_rx_read(priv);
3730         i = rxq->read;
3731
3732         /* Rx interrupt, but nothing sent from uCode */
3733         if (i == r)
3734                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3735
3736         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3737                 fill_rx = 1;
3738
3739         while (i != r) {
3740                 rxb = rxq->queue[i];
3741
3742                 /* If an RXB doesn't have a Rx queue slot associated with it,
3743                  * then a bug has been introduced in the queue refilling
3744                  * routines -- catch it here */
3745                 BUG_ON(rxb == NULL);
3746
3747                 rxq->queue[i] = NULL;
3748
3749                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3750                                             priv->hw_params.rx_buf_size,
3751                                             PCI_DMA_FROMDEVICE);
3752                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3753
3754                 /* Reclaim a command buffer only if this packet is a response
3755                  *   to a (driver-originated) command.
3756                  * If the packet (e.g. Rx frame) originated from uCode,
3757                  *   there is no command buffer to reclaim.
3758                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3759                  *   but apparently a few don't get set; catch them here. */
3760                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3761                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3762                         (pkt->hdr.cmd != REPLY_RX) &&
3763                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3764                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3765                         (pkt->hdr.cmd != REPLY_TX);
3766
3767                 /* Based on type of command response or notification,
3768                  *   handle those that need handling via function in
3769                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3770                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3771                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3772                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3773                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3774                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3775                 } else {
3776                         /* No handling needed */
3777                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3778                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3779                                 r, i, get_cmd_string(pkt->hdr.cmd),
3780                                 pkt->hdr.cmd);
3781                 }
3782
3783                 if (reclaim) {
3784                         /* Invoke any callbacks, transfer the skb to caller, and
3785                          * fire off the (possibly) blocking iwl_send_cmd()
3786                          * as we reclaim the driver command queue */
3787                         if (rxb && rxb->skb)
3788                                 iwl4965_tx_cmd_complete(priv, rxb);
3789                         else
3790                                 IWL_WARNING("Claim null rxb?\n");
3791                 }
3792
3793                 /* For now we just don't re-use anything.  We can tweak this
3794                  * later to try and re-use notification packets and SKBs that
3795                  * fail to Rx correctly */
3796                 if (rxb->skb != NULL) {
3797                         priv->alloc_rxb_skb--;
3798                         dev_kfree_skb_any(rxb->skb);
3799                         rxb->skb = NULL;
3800                 }
3801
3802                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3803                                  priv->hw_params.rx_buf_size,
3804                                  PCI_DMA_FROMDEVICE);
3805                 spin_lock_irqsave(&rxq->lock, flags);
3806                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3807                 spin_unlock_irqrestore(&rxq->lock, flags);
3808                 i = (i + 1) & RX_QUEUE_MASK;
3809                 /* If there are a lot of unused frames,
3810                  * restock the Rx queue so ucode wont assert. */
3811                 if (fill_rx) {
3812                         count++;
3813                         if (count >= 8) {
3814                                 priv->rxq.read = i;
3815                                 __iwl4965_rx_replenish(priv);
3816                                 count = 0;
3817                         }
3818                 }
3819         }
3820
3821         /* Backtrack one entry */
3822         priv->rxq.read = i;
3823         iwl4965_rx_queue_restock(priv);
3824 }
3825
3826 /**
3827  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3828  */
3829 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3830                                   struct iwl4965_tx_queue *txq)
3831 {
3832         u32 reg = 0;
3833         int rc = 0;
3834         int txq_id = txq->q.id;
3835
3836         if (txq->need_update == 0)
3837                 return rc;
3838
3839         /* if we're trying to save power */
3840         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3841                 /* wake up nic if it's powered down ...
3842                  * uCode will wake up, and interrupt us again, so next
3843                  * time we'll skip this part. */
3844                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3845
3846                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3847                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3848                         iwl_set_bit(priv, CSR_GP_CNTRL,
3849                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3850                         return rc;
3851                 }
3852
3853                 /* restore this queue's parameters in nic hardware. */
3854                 rc = iwl_grab_nic_access(priv);
3855                 if (rc)
3856                         return rc;
3857                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3858                                      txq->q.write_ptr | (txq_id << 8));
3859                 iwl_release_nic_access(priv);
3860
3861         /* else not in power-save mode, uCode will never sleep when we're
3862          * trying to tx (during RFKILL, we're not trying to tx). */
3863         } else
3864                 iwl_write32(priv, HBUS_TARG_WRPTR,
3865                             txq->q.write_ptr | (txq_id << 8));
3866
3867         txq->need_update = 0;
3868
3869         return rc;
3870 }
3871
3872 #ifdef CONFIG_IWLWIFI_DEBUG
3873 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
3874 {
3875         DECLARE_MAC_BUF(mac);
3876
3877         IWL_DEBUG_RADIO("RX CONFIG:\n");
3878         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3879         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3880         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3881         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3882                         le32_to_cpu(rxon->filter_flags));
3883         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3884         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3885                         rxon->ofdm_basic_rates);
3886         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3887         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3888                         print_mac(mac, rxon->node_addr));
3889         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3890                         print_mac(mac, rxon->bssid_addr));
3891         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3892 }
3893 #endif
3894
3895 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3896 {
3897         IWL_DEBUG_ISR("Enabling interrupts\n");
3898         set_bit(STATUS_INT_ENABLED, &priv->status);
3899         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3900 }
3901
3902 /* call this function to flush any scheduled tasklet */
3903 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3904 {
3905         /* wait to make sure we flush pedding tasklet*/
3906         synchronize_irq(priv->pci_dev->irq);
3907         tasklet_kill(&priv->irq_tasklet);
3908 }
3909
3910 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3911 {
3912         clear_bit(STATUS_INT_ENABLED, &priv->status);
3913
3914         /* disable interrupts from uCode/NIC to host */
3915         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3916
3917         /* acknowledge/clear/reset any interrupts still pending
3918          * from uCode or flow handler (Rx/Tx DMA) */
3919         iwl_write32(priv, CSR_INT, 0xffffffff);
3920         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3921         IWL_DEBUG_ISR("Disabled interrupts\n");
3922 }
3923
3924 static const char *desc_lookup(int i)
3925 {
3926         switch (i) {
3927         case 1:
3928                 return "FAIL";
3929         case 2:
3930                 return "BAD_PARAM";
3931         case 3:
3932                 return "BAD_CHECKSUM";
3933         case 4:
3934                 return "NMI_INTERRUPT";
3935         case 5:
3936                 return "SYSASSERT";
3937         case 6:
3938                 return "FATAL_ERROR";
3939         }
3940
3941         return "UNKNOWN";
3942 }
3943
3944 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3945 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3946
3947 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3948 {
3949         u32 data2, line;
3950         u32 desc, time, count, base, data1;
3951         u32 blink1, blink2, ilink1, ilink2;
3952         int rc;
3953
3954         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3955
3956         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3957                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3958                 return;
3959         }
3960
3961         rc = iwl_grab_nic_access(priv);
3962         if (rc) {
3963                 IWL_WARNING("Can not read from adapter at this time.\n");
3964                 return;
3965         }
3966
3967         count = iwl_read_targ_mem(priv, base);
3968
3969         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3970                 IWL_ERROR("Start IWL Error Log Dump:\n");
3971                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3972         }
3973
3974         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3975         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3976         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3977         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3978         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3979         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3980         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3981         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3982         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3983
3984         IWL_ERROR("Desc               Time       "
3985                   "data1      data2      line\n");
3986         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3987                   desc_lookup(desc), desc, time, data1, data2, line);
3988         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
3989         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3990                   ilink1, ilink2);
3991
3992         iwl_release_nic_access(priv);
3993 }
3994
3995 #define EVENT_START_OFFSET  (4 * sizeof(u32))
3996
3997 /**
3998  * iwl4965_print_event_log - Dump error event log to syslog
3999  *
4000  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4001  */
4002 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4003                                 u32 num_events, u32 mode)
4004 {
4005         u32 i;
4006         u32 base;       /* SRAM byte address of event log header */
4007         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4008         u32 ptr;        /* SRAM byte address of log data */
4009         u32 ev, time, data; /* event log data */
4010
4011         if (num_events == 0)
4012                 return;
4013
4014         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4015
4016         if (mode == 0)
4017                 event_size = 2 * sizeof(u32);
4018         else
4019                 event_size = 3 * sizeof(u32);
4020
4021         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4022
4023         /* "time" is actually "data" for mode 0 (no timestamp).
4024          * place event id # at far right for easier visual parsing. */
4025         for (i = 0; i < num_events; i++) {
4026                 ev = iwl_read_targ_mem(priv, ptr);
4027                 ptr += sizeof(u32);
4028                 time = iwl_read_targ_mem(priv, ptr);
4029                 ptr += sizeof(u32);
4030                 if (mode == 0)
4031                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4032                 else {
4033                         data = iwl_read_targ_mem(priv, ptr);
4034                         ptr += sizeof(u32);
4035                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4036                 }
4037         }
4038 }
4039
4040 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4041 {
4042         int rc;
4043         u32 base;       /* SRAM byte address of event log header */
4044         u32 capacity;   /* event log capacity in # entries */
4045         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4046         u32 num_wraps;  /* # times uCode wrapped to top of log */
4047         u32 next_entry; /* index of next entry to be written by uCode */
4048         u32 size;       /* # entries that we'll print */
4049
4050         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4051         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4052                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4053                 return;
4054         }
4055
4056         rc = iwl_grab_nic_access(priv);
4057         if (rc) {
4058                 IWL_WARNING("Can not read from adapter at this time.\n");
4059                 return;
4060         }
4061
4062         /* event log header */
4063         capacity = iwl_read_targ_mem(priv, base);
4064         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4065         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4066         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4067
4068         size = num_wraps ? capacity : next_entry;
4069
4070         /* bail out if nothing in log */
4071         if (size == 0) {
4072                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4073                 iwl_release_nic_access(priv);
4074                 return;
4075         }
4076
4077         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4078                   size, num_wraps);
4079
4080         /* if uCode has wrapped back to top of log, start at the oldest entry,
4081          * i.e the next one that uCode would fill. */
4082         if (num_wraps)
4083                 iwl4965_print_event_log(priv, next_entry,
4084                                     capacity - next_entry, mode);
4085
4086         /* (then/else) start at top of log */
4087         iwl4965_print_event_log(priv, 0, next_entry, mode);
4088
4089         iwl_release_nic_access(priv);
4090 }
4091
4092 /**
4093  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4094  */
4095 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4096 {
4097         /* Set the FW error flag -- cleared on iwl4965_down */
4098         set_bit(STATUS_FW_ERROR, &priv->status);
4099
4100         /* Cancel currently queued command. */
4101         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4102
4103 #ifdef CONFIG_IWLWIFI_DEBUG
4104         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4105                 iwl4965_dump_nic_error_log(priv);
4106                 iwl4965_dump_nic_event_log(priv);
4107                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4108         }
4109 #endif
4110
4111         wake_up_interruptible(&priv->wait_command_queue);
4112
4113         /* Keep the restart process from trying to send host
4114          * commands by clearing the INIT status bit */
4115         clear_bit(STATUS_READY, &priv->status);
4116
4117         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4118                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4119                           "Restarting adapter due to uCode error.\n");
4120
4121                 if (iwl_is_associated(priv)) {
4122                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4123                                sizeof(priv->recovery_rxon));
4124                         priv->error_recovering = 1;
4125                 }
4126                 queue_work(priv->workqueue, &priv->restart);
4127         }
4128 }
4129
4130 static void iwl4965_error_recovery(struct iwl_priv *priv)
4131 {
4132         unsigned long flags;
4133
4134         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4135                sizeof(priv->staging_rxon));
4136         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4137         iwl4965_commit_rxon(priv);
4138
4139         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4140
4141         spin_lock_irqsave(&priv->lock, flags);
4142         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4143         priv->error_recovering = 0;
4144         spin_unlock_irqrestore(&priv->lock, flags);
4145 }
4146
4147 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4148 {
4149         u32 inta, handled = 0;
4150         u32 inta_fh;
4151         unsigned long flags;
4152 #ifdef CONFIG_IWLWIFI_DEBUG
4153         u32 inta_mask;
4154 #endif
4155
4156         spin_lock_irqsave(&priv->lock, flags);
4157
4158         /* Ack/clear/reset pending uCode interrupts.
4159          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4160          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4161         inta = iwl_read32(priv, CSR_INT);
4162         iwl_write32(priv, CSR_INT, inta);
4163
4164         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4165          * Any new interrupts that happen after this, either while we're
4166          * in this tasklet, or later, will show up in next ISR/tasklet. */
4167         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4168         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4169
4170 #ifdef CONFIG_IWLWIFI_DEBUG
4171         if (iwl_debug_level & IWL_DL_ISR) {
4172                 /* just for debug */
4173                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4174                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4175                               inta, inta_mask, inta_fh);
4176         }
4177 #endif
4178
4179         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4180          * atomic, make sure that inta covers all the interrupts that
4181          * we've discovered, even if FH interrupt came in just after
4182          * reading CSR_INT. */
4183         if (inta_fh & CSR49_FH_INT_RX_MASK)
4184                 inta |= CSR_INT_BIT_FH_RX;
4185         if (inta_fh & CSR49_FH_INT_TX_MASK)
4186                 inta |= CSR_INT_BIT_FH_TX;
4187
4188         /* Now service all interrupt bits discovered above. */
4189         if (inta & CSR_INT_BIT_HW_ERR) {
4190                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4191
4192                 /* Tell the device to stop sending interrupts */
4193                 iwl4965_disable_interrupts(priv);
4194
4195                 iwl4965_irq_handle_error(priv);
4196
4197                 handled |= CSR_INT_BIT_HW_ERR;
4198
4199                 spin_unlock_irqrestore(&priv->lock, flags);
4200
4201                 return;
4202         }
4203
4204 #ifdef CONFIG_IWLWIFI_DEBUG
4205         if (iwl_debug_level & (IWL_DL_ISR)) {
4206                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4207                 if (inta & CSR_INT_BIT_SCD)
4208                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4209                                       "the frame/frames.\n");
4210
4211                 /* Alive notification via Rx interrupt will do the real work */
4212                 if (inta & CSR_INT_BIT_ALIVE)
4213                         IWL_DEBUG_ISR("Alive interrupt\n");
4214         }
4215 #endif
4216         /* Safely ignore these bits for debug checks below */
4217         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4218
4219         /* HW RF KILL switch toggled */
4220         if (inta & CSR_INT_BIT_RF_KILL) {
4221                 int hw_rf_kill = 0;
4222                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4223                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4224                         hw_rf_kill = 1;
4225
4226                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4227                                 "RF_KILL bit toggled to %s.\n",
4228                                 hw_rf_kill ? "disable radio":"enable radio");
4229
4230                 /* Queue restart only if RF_KILL switch was set to "kill"
4231                  *   when we loaded driver, and is now set to "enable".
4232                  * After we're Alive, RF_KILL gets handled by
4233                  *   iwl4965_rx_card_state_notif() */
4234                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4235                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4236                         queue_work(priv->workqueue, &priv->restart);
4237                 }
4238
4239                 handled |= CSR_INT_BIT_RF_KILL;
4240         }
4241
4242         /* Chip got too hot and stopped itself */
4243         if (inta & CSR_INT_BIT_CT_KILL) {
4244                 IWL_ERROR("Microcode CT kill error detected.\n");
4245                 handled |= CSR_INT_BIT_CT_KILL;
4246         }
4247
4248         /* Error detected by uCode */
4249         if (inta & CSR_INT_BIT_SW_ERR) {
4250                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4251                           inta);
4252                 iwl4965_irq_handle_error(priv);
4253                 handled |= CSR_INT_BIT_SW_ERR;
4254         }
4255
4256         /* uCode wakes up after power-down sleep */
4257         if (inta & CSR_INT_BIT_WAKEUP) {
4258                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4259                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4260                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4261                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4262                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4263                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4264                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4265                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4266
4267                 handled |= CSR_INT_BIT_WAKEUP;
4268         }
4269
4270         /* All uCode command responses, including Tx command responses,
4271          * Rx "responses" (frame-received notification), and other
4272          * notifications from uCode come through here*/
4273         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4274                 iwl4965_rx_handle(priv);
4275                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4276         }
4277
4278         if (inta & CSR_INT_BIT_FH_TX) {
4279                 IWL_DEBUG_ISR("Tx interrupt\n");
4280                 handled |= CSR_INT_BIT_FH_TX;
4281         }
4282
4283         if (inta & ~handled)
4284                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4285
4286         if (inta & ~CSR_INI_SET_MASK) {
4287                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4288                          inta & ~CSR_INI_SET_MASK);
4289                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4290         }
4291
4292         /* Re-enable all interrupts */
4293         /* only Re-enable if diabled by irq */
4294         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4295                 iwl4965_enable_interrupts(priv);
4296
4297 #ifdef CONFIG_IWLWIFI_DEBUG
4298         if (iwl_debug_level & (IWL_DL_ISR)) {
4299                 inta = iwl_read32(priv, CSR_INT);
4300                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4301                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4302                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4303                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4304         }
4305 #endif
4306         spin_unlock_irqrestore(&priv->lock, flags);
4307 }
4308
4309 static irqreturn_t iwl4965_isr(int irq, void *data)
4310 {
4311         struct iwl_priv *priv = data;
4312         u32 inta, inta_mask;
4313         u32 inta_fh;
4314         if (!priv)
4315                 return IRQ_NONE;
4316
4317         spin_lock(&priv->lock);
4318
4319         /* Disable (but don't clear!) interrupts here to avoid
4320          *    back-to-back ISRs and sporadic interrupts from our NIC.
4321          * If we have something to service, the tasklet will re-enable ints.
4322          * If we *don't* have something, we'll re-enable before leaving here. */
4323         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4324         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4325
4326         /* Discover which interrupts are active/pending */
4327         inta = iwl_read32(priv, CSR_INT);
4328         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4329
4330         /* Ignore interrupt if there's nothing in NIC to service.
4331          * This may be due to IRQ shared with another device,
4332          * or due to sporadic interrupts thrown from our NIC. */
4333         if (!inta && !inta_fh) {
4334                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4335                 goto none;
4336         }
4337
4338         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4339                 /* Hardware disappeared. It might have already raised
4340                  * an interrupt */
4341                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4342                 goto unplugged;
4343         }
4344
4345         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4346                       inta, inta_mask, inta_fh);
4347
4348         inta &= ~CSR_INT_BIT_SCD;
4349
4350         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4351         if (likely(inta || inta_fh))
4352                 tasklet_schedule(&priv->irq_tasklet);
4353
4354  unplugged:
4355         spin_unlock(&priv->lock);
4356         return IRQ_HANDLED;
4357
4358  none:
4359         /* re-enable interrupts here since we don't have anything to service. */
4360         /* only Re-enable if diabled by irq */
4361         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4362                 iwl4965_enable_interrupts(priv);
4363         spin_unlock(&priv->lock);
4364         return IRQ_NONE;
4365 }
4366
4367 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4368  * sending probe req.  This should be set long enough to hear probe responses
4369  * from more than one AP.  */
4370 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4371 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4372
4373 /* For faster active scanning, scan will move to the next channel if fewer than
4374  * PLCP_QUIET_THRESH packets are heard on this channel within
4375  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4376  * time if it's a quiet channel (nothing responded to our probe, and there's
4377  * no other traffic).
4378  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4379 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4380 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4381
4382 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4383  * Must be set longer than active dwell time.
4384  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4385 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4386 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4387 #define IWL_PASSIVE_DWELL_BASE      (100)
4388 #define IWL_CHANNEL_TUNE_TIME       5
4389
4390 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4391                                                 enum ieee80211_band band)
4392 {
4393         if (band == IEEE80211_BAND_5GHZ)
4394                 return IWL_ACTIVE_DWELL_TIME_52;
4395         else
4396                 return IWL_ACTIVE_DWELL_TIME_24;
4397 }
4398
4399 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4400                                           enum ieee80211_band band)
4401 {
4402         u16 active = iwl4965_get_active_dwell_time(priv, band);
4403         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4404             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4405             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4406
4407         if (iwl_is_associated(priv)) {
4408                 /* If we're associated, we clamp the maximum passive
4409                  * dwell time to be 98% of the beacon interval (minus
4410                  * 2 * channel tune time) */
4411                 passive = priv->beacon_int;
4412                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4413                         passive = IWL_PASSIVE_DWELL_BASE;
4414                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4415         }
4416
4417         if (passive <= active)
4418                 passive = active + 1;
4419
4420         return passive;
4421 }
4422
4423 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4424                                          enum ieee80211_band band,
4425                                      u8 is_active, u8 direct_mask,
4426                                      struct iwl4965_scan_channel *scan_ch)
4427 {
4428         const struct ieee80211_channel *channels = NULL;
4429         const struct ieee80211_supported_band *sband;
4430         const struct iwl_channel_info *ch_info;
4431         u16 passive_dwell = 0;
4432         u16 active_dwell = 0;
4433         int added, i;
4434
4435         sband = iwl_get_hw_mode(priv, band);
4436         if (!sband)
4437                 return 0;
4438
4439         channels = sband->channels;
4440
4441         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4442         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4443
4444         for (i = 0, added = 0; i < sband->n_channels; i++) {
4445                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4446                         continue;
4447
4448                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4449
4450                 ch_info = iwl_get_channel_info(priv, band,
4451                                          scan_ch->channel);
4452                 if (!is_channel_valid(ch_info)) {
4453                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4454                                        scan_ch->channel);
4455                         continue;
4456                 }
4457
4458                 if (!is_active || is_channel_passive(ch_info) ||
4459                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4460                         scan_ch->type = 0;      /* passive */
4461                 else
4462                         scan_ch->type = 1;      /* active */
4463
4464                 if (scan_ch->type & 1)
4465                         scan_ch->type |= (direct_mask << 1);
4466
4467                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4468                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4469
4470                 /* Set txpower levels to defaults */
4471                 scan_ch->tpc.dsp_atten = 110;
4472                 /* scan_pwr_info->tpc.dsp_atten; */
4473
4474                 /*scan_pwr_info->tpc.tx_gain; */
4475                 if (band == IEEE80211_BAND_5GHZ)
4476                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4477                 else {
4478                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4479                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4480                          * power level:
4481                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4482                          */
4483                 }
4484
4485                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4486                                scan_ch->channel,
4487                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4488                                (scan_ch->type & 1) ?
4489                                active_dwell : passive_dwell);
4490
4491                 scan_ch++;
4492                 added++;
4493         }
4494
4495         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4496         return added;
4497 }
4498
4499 /******************************************************************************
4500  *
4501  * uCode download functions
4502  *
4503  ******************************************************************************/
4504
4505 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4506 {
4507         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4508         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4509         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4510         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4511         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4512         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4513 }
4514
4515 static void iwl4965_nic_start(struct iwl_priv *priv)
4516 {
4517         /* Remove all resets to allow NIC to operate */
4518         iwl_write32(priv, CSR_RESET, 0);
4519 }
4520
4521
4522 /**
4523  * iwl4965_read_ucode - Read uCode images from disk file.
4524  *
4525  * Copy into buffers for card to fetch via bus-mastering
4526  */
4527 static int iwl4965_read_ucode(struct iwl_priv *priv)
4528 {
4529         struct iwl4965_ucode *ucode;
4530         int ret;
4531         const struct firmware *ucode_raw;
4532         const char *name = priv->cfg->fw_name;
4533         u8 *src;
4534         size_t len;
4535         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4536
4537         /* Ask kernel firmware_class module to get the boot firmware off disk.
4538          * request_firmware() is synchronous, file is in memory on return. */
4539         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4540         if (ret < 0) {
4541                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4542                                         name, ret);
4543                 goto error;
4544         }
4545
4546         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4547                        name, ucode_raw->size);
4548
4549         /* Make sure that we got at least our header! */
4550         if (ucode_raw->size < sizeof(*ucode)) {
4551                 IWL_ERROR("File size way too small!\n");
4552                 ret = -EINVAL;
4553                 goto err_release;
4554         }
4555
4556         /* Data from ucode file:  header followed by uCode images */
4557         ucode = (void *)ucode_raw->data;
4558
4559         ver = le32_to_cpu(ucode->ver);
4560         inst_size = le32_to_cpu(ucode->inst_size);
4561         data_size = le32_to_cpu(ucode->data_size);
4562         init_size = le32_to_cpu(ucode->init_size);
4563         init_data_size = le32_to_cpu(ucode->init_data_size);
4564         boot_size = le32_to_cpu(ucode->boot_size);
4565
4566         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4567         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4568                        inst_size);
4569         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4570                        data_size);
4571         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4572                        init_size);
4573         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4574                        init_data_size);
4575         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4576                        boot_size);
4577
4578         /* Verify size of file vs. image size info in file's header */
4579         if (ucode_raw->size < sizeof(*ucode) +
4580                 inst_size + data_size + init_size +
4581                 init_data_size + boot_size) {
4582
4583                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4584                                (int)ucode_raw->size);
4585                 ret = -EINVAL;
4586                 goto err_release;
4587         }
4588
4589         /* Verify that uCode images will fit in card's SRAM */
4590         if (inst_size > priv->hw_params.max_inst_size) {
4591                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4592                                inst_size);
4593                 ret = -EINVAL;
4594                 goto err_release;
4595         }
4596
4597         if (data_size > priv->hw_params.max_data_size) {
4598                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4599                                 data_size);
4600                 ret = -EINVAL;
4601                 goto err_release;
4602         }
4603         if (init_size > priv->hw_params.max_inst_size) {
4604                 IWL_DEBUG_INFO
4605                     ("uCode init instr len %d too large to fit in\n",
4606                       init_size);
4607                 ret = -EINVAL;
4608                 goto err_release;
4609         }
4610         if (init_data_size > priv->hw_params.max_data_size) {
4611                 IWL_DEBUG_INFO
4612                     ("uCode init data len %d too large to fit in\n",
4613                       init_data_size);
4614                 ret = -EINVAL;
4615                 goto err_release;
4616         }
4617         if (boot_size > priv->hw_params.max_bsm_size) {
4618                 IWL_DEBUG_INFO
4619                     ("uCode boot instr len %d too large to fit in\n",
4620                       boot_size);
4621                 ret = -EINVAL;
4622                 goto err_release;
4623         }
4624
4625         /* Allocate ucode buffers for card's bus-master loading ... */
4626
4627         /* Runtime instructions and 2 copies of data:
4628          * 1) unmodified from disk
4629          * 2) backup cache for save/restore during power-downs */
4630         priv->ucode_code.len = inst_size;
4631         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4632
4633         priv->ucode_data.len = data_size;
4634         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4635
4636         priv->ucode_data_backup.len = data_size;
4637         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4638
4639         /* Initialization instructions and data */
4640         if (init_size && init_data_size) {
4641                 priv->ucode_init.len = init_size;
4642                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4643
4644                 priv->ucode_init_data.len = init_data_size;
4645                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4646
4647                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4648                         goto err_pci_alloc;
4649         }
4650
4651         /* Bootstrap (instructions only, no data) */
4652         if (boot_size) {
4653                 priv->ucode_boot.len = boot_size;
4654                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4655
4656                 if (!priv->ucode_boot.v_addr)
4657                         goto err_pci_alloc;
4658         }
4659
4660         /* Copy images into buffers for card's bus-master reads ... */
4661
4662         /* Runtime instructions (first block of data in file) */
4663         src = &ucode->data[0];
4664         len = priv->ucode_code.len;
4665         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4666         memcpy(priv->ucode_code.v_addr, src, len);
4667         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4668                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4669
4670         /* Runtime data (2nd block)
4671          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
4672         src = &ucode->data[inst_size];
4673         len = priv->ucode_data.len;
4674         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4675         memcpy(priv->ucode_data.v_addr, src, len);
4676         memcpy(priv->ucode_data_backup.v_addr, src, len);
4677
4678         /* Initialization instructions (3rd block) */
4679         if (init_size) {
4680                 src = &ucode->data[inst_size + data_size];
4681                 len = priv->ucode_init.len;
4682                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4683                                 len);
4684                 memcpy(priv->ucode_init.v_addr, src, len);
4685         }
4686
4687         /* Initialization data (4th block) */
4688         if (init_data_size) {
4689                 src = &ucode->data[inst_size + data_size + init_size];
4690                 len = priv->ucode_init_data.len;
4691                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4692                                len);
4693                 memcpy(priv->ucode_init_data.v_addr, src, len);
4694         }
4695
4696         /* Bootstrap instructions (5th block) */
4697         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4698         len = priv->ucode_boot.len;
4699         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4700         memcpy(priv->ucode_boot.v_addr, src, len);
4701
4702         /* We have our copies now, allow OS release its copies */
4703         release_firmware(ucode_raw);
4704         return 0;
4705
4706  err_pci_alloc:
4707         IWL_ERROR("failed to allocate pci memory\n");
4708         ret = -ENOMEM;
4709         iwl4965_dealloc_ucode_pci(priv);
4710
4711  err_release:
4712         release_firmware(ucode_raw);
4713
4714  error:
4715         return ret;
4716 }
4717
4718
4719 /**
4720  * iwl4965_set_ucode_ptrs - Set uCode address location
4721  *
4722  * Tell initialization uCode where to find runtime uCode.
4723  *
4724  * BSM registers initially contain pointers to initialization uCode.
4725  * We need to replace them to load runtime uCode inst and data,
4726  * and to save runtime data when powering down.
4727  */
4728 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
4729 {
4730         dma_addr_t pinst;
4731         dma_addr_t pdata;
4732         int rc = 0;
4733         unsigned long flags;
4734
4735         /* bits 35:4 for 4965 */
4736         pinst = priv->ucode_code.p_addr >> 4;
4737         pdata = priv->ucode_data_backup.p_addr >> 4;
4738
4739         spin_lock_irqsave(&priv->lock, flags);
4740         rc = iwl_grab_nic_access(priv);
4741         if (rc) {
4742                 spin_unlock_irqrestore(&priv->lock, flags);
4743                 return rc;
4744         }
4745
4746         /* Tell bootstrap uCode where to find image to load */
4747         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4748         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4749         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4750                                  priv->ucode_data.len);
4751
4752         /* Inst bytecount must be last to set up, bit 31 signals uCode
4753          *   that all new ptr/size info is in place */
4754         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4755                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4756
4757         iwl_release_nic_access(priv);
4758
4759         spin_unlock_irqrestore(&priv->lock, flags);
4760
4761         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4762
4763         return rc;
4764 }
4765
4766 /**
4767  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
4768  *
4769  * Called after REPLY_ALIVE notification received from "initialize" uCode.
4770  *
4771  * The 4965 "initialize" ALIVE reply contains calibration data for:
4772  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
4773  *   (3945 does not contain this data).
4774  *
4775  * Tell "initialize" uCode to go ahead and load the runtime uCode.
4776 */
4777 static void iwl4965_init_alive_start(struct iwl_priv *priv)
4778 {
4779         /* Check alive response for "valid" sign from uCode */
4780         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
4781                 /* We had an error bringing up the hardware, so take it
4782                  * all the way back down so we can try again */
4783                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
4784                 goto restart;
4785         }
4786
4787         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
4788          * This is a paranoid check, because we would not have gotten the
4789          * "initialize" alive if code weren't properly loaded.  */
4790         if (iwl_verify_ucode(priv)) {
4791                 /* Runtime instruction load was bad;
4792                  * take it all the way back down so we can try again */
4793                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
4794                 goto restart;
4795         }
4796
4797         /* Calculate temperature */
4798         priv->temperature = iwl4965_get_temperature(priv);
4799
4800         /* Send pointers to protocol/runtime uCode image ... init code will
4801          * load and launch runtime uCode, which will send us another "Alive"
4802          * notification. */
4803         IWL_DEBUG_INFO("Initialization Alive received.\n");
4804         if (iwl4965_set_ucode_ptrs(priv)) {
4805                 /* Runtime instruction load won't happen;
4806                  * take it all the way back down so we can try again */
4807                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
4808                 goto restart;
4809         }
4810         return;
4811
4812  restart:
4813         queue_work(priv->workqueue, &priv->restart);
4814 }
4815
4816
4817 /**
4818  * iwl4965_alive_start - called after REPLY_ALIVE notification received
4819  *                   from protocol/runtime uCode (initialization uCode's
4820  *                   Alive gets handled by iwl4965_init_alive_start()).
4821  */
4822 static void iwl4965_alive_start(struct iwl_priv *priv)
4823 {
4824         int ret = 0;
4825
4826         IWL_DEBUG_INFO("Runtime Alive received.\n");
4827
4828         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
4829                 /* We had an error bringing up the hardware, so take it
4830                  * all the way back down so we can try again */
4831                 IWL_DEBUG_INFO("Alive failed.\n");
4832                 goto restart;
4833         }
4834
4835         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
4836          * This is a paranoid check, because we would not have gotten the
4837          * "runtime" alive if code weren't properly loaded.  */
4838         if (iwl_verify_ucode(priv)) {
4839                 /* Runtime instruction load was bad;
4840                  * take it all the way back down so we can try again */
4841                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
4842                 goto restart;
4843         }
4844
4845         iwlcore_clear_stations_table(priv);
4846
4847         ret = priv->cfg->ops->lib->alive_notify(priv);
4848         if (ret) {
4849                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
4850                             ret);
4851                 goto restart;
4852         }
4853
4854         /* After the ALIVE response, we can send host commands to 4965 uCode */
4855         set_bit(STATUS_ALIVE, &priv->status);
4856
4857         /* Clear out the uCode error bit if it is set */
4858         clear_bit(STATUS_FW_ERROR, &priv->status);
4859
4860         if (iwl_is_rfkill(priv))
4861                 return;
4862
4863         ieee80211_start_queues(priv->hw);
4864
4865         priv->active_rate = priv->rates_mask;
4866         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
4867
4868         if (iwl_is_associated(priv)) {
4869                 struct iwl4965_rxon_cmd *active_rxon =
4870                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
4871
4872                 memcpy(&priv->staging_rxon, &priv->active_rxon,
4873                        sizeof(priv->staging_rxon));
4874                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4875         } else {
4876                 /* Initialize our rx_config data */
4877                 iwl4965_connection_init_rx_config(priv);
4878                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
4879         }
4880
4881         /* Configure Bluetooth device coexistence support */
4882         iwl4965_send_bt_config(priv);
4883
4884         /* Configure the adapter for unassociated operation */
4885         iwl4965_commit_rxon(priv);
4886
4887         /* At this point, the NIC is initialized and operational */
4888         priv->notif_missed_beacons = 0;
4889
4890         iwl4965_rf_kill_ct_config(priv);
4891
4892         iwl_leds_register(priv);
4893
4894         IWL_DEBUG_INFO("ALIVE processing complete.\n");
4895         set_bit(STATUS_READY, &priv->status);
4896         wake_up_interruptible(&priv->wait_command_queue);
4897
4898         if (priv->error_recovering)
4899                 iwl4965_error_recovery(priv);
4900
4901         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
4902         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
4903         return;
4904
4905  restart:
4906         queue_work(priv->workqueue, &priv->restart);
4907 }
4908
4909 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
4910
4911 static void __iwl4965_down(struct iwl_priv *priv)
4912 {
4913         unsigned long flags;
4914         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
4915         struct ieee80211_conf *conf = NULL;
4916
4917         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
4918
4919         conf = ieee80211_get_hw_conf(priv->hw);
4920
4921         if (!exit_pending)
4922                 set_bit(STATUS_EXIT_PENDING, &priv->status);
4923
4924         iwl_leds_unregister(priv);
4925
4926         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
4927
4928         iwlcore_clear_stations_table(priv);
4929
4930         /* Unblock any waiting calls */
4931         wake_up_interruptible_all(&priv->wait_command_queue);
4932
4933         /* Wipe out the EXIT_PENDING status bit if we are not actually
4934          * exiting the module */
4935         if (!exit_pending)
4936                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
4937
4938         /* stop and reset the on-board processor */
4939         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4940
4941         /* tell the device to stop sending interrupts */
4942         spin_lock_irqsave(&priv->lock, flags);
4943         iwl4965_disable_interrupts(priv);
4944         spin_unlock_irqrestore(&priv->lock, flags);
4945         iwl_synchronize_irq(priv);
4946
4947         if (priv->mac80211_registered)
4948                 ieee80211_stop_queues(priv->hw);
4949
4950         /* If we have not previously called iwl4965_init() then
4951          * clear all bits but the RF Kill and SUSPEND bits and return */
4952         if (!iwl_is_init(priv)) {
4953                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4954                                         STATUS_RF_KILL_HW |
4955                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4956                                         STATUS_RF_KILL_SW |
4957                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4958                                         STATUS_GEO_CONFIGURED |
4959                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4960                                         STATUS_IN_SUSPEND;
4961                 goto exit;
4962         }
4963
4964         /* ...otherwise clear out all the status bits but the RF Kill and
4965          * SUSPEND bits and continue taking the NIC down. */
4966         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4967                                 STATUS_RF_KILL_HW |
4968                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4969                                 STATUS_RF_KILL_SW |
4970                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4971                                 STATUS_GEO_CONFIGURED |
4972                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4973                                 STATUS_IN_SUSPEND |
4974                         test_bit(STATUS_FW_ERROR, &priv->status) <<
4975                                 STATUS_FW_ERROR;
4976
4977         spin_lock_irqsave(&priv->lock, flags);
4978         iwl_clear_bit(priv, CSR_GP_CNTRL,
4979                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4980         spin_unlock_irqrestore(&priv->lock, flags);
4981
4982         iwl4965_hw_txq_ctx_stop(priv);
4983         iwl4965_hw_rxq_stop(priv);
4984
4985         spin_lock_irqsave(&priv->lock, flags);
4986         if (!iwl_grab_nic_access(priv)) {
4987                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
4988                                          APMG_CLK_VAL_DMA_CLK_RQT);
4989                 iwl_release_nic_access(priv);
4990         }
4991         spin_unlock_irqrestore(&priv->lock, flags);
4992
4993         udelay(5);
4994
4995         iwl4965_hw_nic_stop_master(priv);
4996         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4997         iwl4965_hw_nic_reset(priv);
4998         priv->cfg->ops->lib->free_shared_mem(priv);
4999
5000  exit:
5001         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5002
5003         if (priv->ibss_beacon)
5004                 dev_kfree_skb(priv->ibss_beacon);
5005         priv->ibss_beacon = NULL;
5006
5007         /* clear out any free frames */
5008         iwl4965_clear_free_frames(priv);
5009 }
5010
5011 static void iwl4965_down(struct iwl_priv *priv)
5012 {
5013         mutex_lock(&priv->mutex);
5014         __iwl4965_down(priv);
5015         mutex_unlock(&priv->mutex);
5016
5017         iwl4965_cancel_deferred_work(priv);
5018 }
5019
5020 #define MAX_HW_RESTARTS 5
5021
5022 static int __iwl4965_up(struct iwl_priv *priv)
5023 {
5024         int i;
5025         int ret;
5026
5027         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5028                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5029                 return -EIO;
5030         }
5031
5032         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5033                 IWL_WARNING("Radio disabled by SW RF kill (module "
5034                             "parameter)\n");
5035                 iwl_rfkill_set_hw_state(priv);
5036                 return -ENODEV;
5037         }
5038
5039         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5040                 IWL_ERROR("ucode not available for device bringup\n");
5041                 return -EIO;
5042         }
5043
5044         /* If platform's RF_KILL switch is NOT set to KILL */
5045         if (iwl_read32(priv, CSR_GP_CNTRL) &
5046                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5047                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5048         else {
5049                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5050                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5051                         iwl_rfkill_set_hw_state(priv);
5052                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5053                         return -ENODEV;
5054                 }
5055         }
5056
5057         iwl_rfkill_set_hw_state(priv);
5058         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5059
5060         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
5061         if (ret) {
5062                 IWL_ERROR("Unable to allocate shared memory\n");
5063                 return ret;
5064         }
5065
5066         ret = priv->cfg->ops->lib->hw_nic_init(priv);
5067         if (ret) {
5068                 IWL_ERROR("Unable to init nic\n");
5069                 return ret;
5070         }
5071
5072         /* make sure rfkill handshake bits are cleared */
5073         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5074         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5075                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5076
5077         /* clear (again), then enable host interrupts */
5078         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5079         iwl4965_enable_interrupts(priv);
5080
5081         /* really make sure rfkill handshake bits are cleared */
5082         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5083         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5084
5085         /* Copy original ucode data image from disk into backup cache.
5086          * This will be used to initialize the on-board processor's
5087          * data SRAM for a clean start when the runtime program first loads. */
5088         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5089                priv->ucode_data.len);
5090
5091         /* We return success when we resume from suspend and rf_kill is on. */
5092         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5093                 return 0;
5094
5095         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5096
5097                 iwlcore_clear_stations_table(priv);
5098
5099                 /* load bootstrap state machine,
5100                  * load bootstrap program into processor's memory,
5101                  * prepare to load the "initialize" uCode */
5102                 ret = priv->cfg->ops->lib->load_ucode(priv);
5103
5104                 if (ret) {
5105                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5106                         continue;
5107                 }
5108
5109                 /* start card; "initialize" will load runtime ucode */
5110                 iwl4965_nic_start(priv);
5111
5112                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5113
5114                 return 0;
5115         }
5116
5117         set_bit(STATUS_EXIT_PENDING, &priv->status);
5118         __iwl4965_down(priv);
5119
5120         /* tried to restart and config the device for as long as our
5121          * patience could withstand */
5122         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5123         return -EIO;
5124 }
5125
5126
5127 /*****************************************************************************
5128  *
5129  * Workqueue callbacks
5130  *
5131  *****************************************************************************/
5132
5133 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5134 {
5135         struct iwl_priv *priv =
5136             container_of(data, struct iwl_priv, init_alive_start.work);
5137
5138         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5139                 return;
5140
5141         mutex_lock(&priv->mutex);
5142         iwl4965_init_alive_start(priv);
5143         mutex_unlock(&priv->mutex);
5144 }
5145
5146 static void iwl4965_bg_alive_start(struct work_struct *data)
5147 {
5148         struct iwl_priv *priv =
5149             container_of(data, struct iwl_priv, alive_start.work);
5150
5151         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5152                 return;
5153
5154         mutex_lock(&priv->mutex);
5155         iwl4965_alive_start(priv);
5156         mutex_unlock(&priv->mutex);
5157 }
5158
5159 static void iwl4965_bg_rf_kill(struct work_struct *work)
5160 {
5161         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5162
5163         wake_up_interruptible(&priv->wait_command_queue);
5164
5165         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5166                 return;
5167
5168         mutex_lock(&priv->mutex);
5169
5170         if (!iwl_is_rfkill(priv)) {
5171                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5172                           "HW and/or SW RF Kill no longer active, restarting "
5173                           "device\n");
5174                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5175                         queue_work(priv->workqueue, &priv->restart);
5176         } else {
5177                 /* make sure mac80211 stop sending Tx frame */
5178                 if (priv->mac80211_registered)
5179                         ieee80211_stop_queues(priv->hw);
5180
5181                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5182                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5183                                           "disabled by SW switch\n");
5184                 else
5185                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5186                                     "Kill switch must be turned off for "
5187                                     "wireless networking to work.\n");
5188         }
5189         iwl_rfkill_set_hw_state(priv);
5190
5191         mutex_unlock(&priv->mutex);
5192 }
5193
5194 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5195
5196 static void iwl4965_bg_scan_check(struct work_struct *data)
5197 {
5198         struct iwl_priv *priv =
5199             container_of(data, struct iwl_priv, scan_check.work);
5200
5201         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5202                 return;
5203
5204         mutex_lock(&priv->mutex);
5205         if (test_bit(STATUS_SCANNING, &priv->status) ||
5206             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5207                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5208                           "Scan completion watchdog resetting adapter (%dms)\n",
5209                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5210
5211                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5212                         iwl4965_send_scan_abort(priv);
5213         }
5214         mutex_unlock(&priv->mutex);
5215 }
5216
5217 static void iwl4965_bg_request_scan(struct work_struct *data)
5218 {
5219         struct iwl_priv *priv =
5220             container_of(data, struct iwl_priv, request_scan);
5221         struct iwl_host_cmd cmd = {
5222                 .id = REPLY_SCAN_CMD,
5223                 .len = sizeof(struct iwl4965_scan_cmd),
5224                 .meta.flags = CMD_SIZE_HUGE,
5225         };
5226         struct iwl4965_scan_cmd *scan;
5227         struct ieee80211_conf *conf = NULL;
5228         u16 cmd_len;
5229         enum ieee80211_band band;
5230         u8 direct_mask;
5231         int ret = 0;
5232
5233         conf = ieee80211_get_hw_conf(priv->hw);
5234
5235         mutex_lock(&priv->mutex);
5236
5237         if (!iwl_is_ready(priv)) {
5238                 IWL_WARNING("request scan called when driver not ready.\n");
5239                 goto done;
5240         }
5241
5242         /* Make sure the scan wasn't cancelled before this queued work
5243          * was given the chance to run... */
5244         if (!test_bit(STATUS_SCANNING, &priv->status))
5245                 goto done;
5246
5247         /* This should never be called or scheduled if there is currently
5248          * a scan active in the hardware. */
5249         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5250                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5251                                "Ignoring second request.\n");
5252                 ret = -EIO;
5253                 goto done;
5254         }
5255
5256         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5257                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5258                 goto done;
5259         }
5260
5261         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5262                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5263                 goto done;
5264         }
5265
5266         if (iwl_is_rfkill(priv)) {
5267                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5268                 goto done;
5269         }
5270
5271         if (!test_bit(STATUS_READY, &priv->status)) {
5272                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5273                 goto done;
5274         }
5275
5276         if (!priv->scan_bands) {
5277                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5278                 goto done;
5279         }
5280
5281         if (!priv->scan) {
5282                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5283                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5284                 if (!priv->scan) {
5285                         ret = -ENOMEM;
5286                         goto done;
5287                 }
5288         }
5289         scan = priv->scan;
5290         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5291
5292         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5293         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5294
5295         if (iwl_is_associated(priv)) {
5296                 u16 interval = 0;
5297                 u32 extra;
5298                 u32 suspend_time = 100;
5299                 u32 scan_suspend_time = 100;
5300                 unsigned long flags;
5301
5302                 IWL_DEBUG_INFO("Scanning while associated...\n");
5303
5304                 spin_lock_irqsave(&priv->lock, flags);
5305                 interval = priv->beacon_int;
5306                 spin_unlock_irqrestore(&priv->lock, flags);
5307
5308                 scan->suspend_time = 0;
5309                 scan->max_out_time = cpu_to_le32(200 * 1024);
5310                 if (!interval)
5311                         interval = suspend_time;
5312
5313                 extra = (suspend_time / interval) << 22;
5314                 scan_suspend_time = (extra |
5315                     ((suspend_time % interval) * 1024));
5316                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5317                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5318                                scan_suspend_time, interval);
5319         }
5320
5321         /* We should add the ability for user to lock to PASSIVE ONLY */
5322         if (priv->one_direct_scan) {
5323                 IWL_DEBUG_SCAN
5324                     ("Kicking off one direct scan for '%s'\n",
5325                      iwl4965_escape_essid(priv->direct_ssid,
5326                                       priv->direct_ssid_len));
5327                 scan->direct_scan[0].id = WLAN_EID_SSID;
5328                 scan->direct_scan[0].len = priv->direct_ssid_len;
5329                 memcpy(scan->direct_scan[0].ssid,
5330                        priv->direct_ssid, priv->direct_ssid_len);
5331                 direct_mask = 1;
5332         } else if (!iwl_is_associated(priv) && priv->essid_len) {
5333                 IWL_DEBUG_SCAN
5334                   ("Kicking off one direct scan for '%s' when not associated\n",
5335                    iwl4965_escape_essid(priv->essid, priv->essid_len));
5336                 scan->direct_scan[0].id = WLAN_EID_SSID;
5337                 scan->direct_scan[0].len = priv->essid_len;
5338                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5339                 direct_mask = 1;
5340         } else {
5341                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5342                 direct_mask = 0;
5343         }
5344
5345         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5346         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5347         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5348
5349
5350         switch (priv->scan_bands) {
5351         case 2:
5352                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5353                 scan->tx_cmd.rate_n_flags =
5354                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5355                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5356
5357                 scan->good_CRC_th = 0;
5358                 band = IEEE80211_BAND_2GHZ;
5359                 break;
5360
5361         case 1:
5362                 scan->tx_cmd.rate_n_flags =
5363                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5364                                 RATE_MCS_ANT_B_MSK);
5365                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5366                 band = IEEE80211_BAND_5GHZ;
5367                 break;
5368
5369         default:
5370                 IWL_WARNING("Invalid scan band count\n");
5371                 goto done;
5372         }
5373
5374         /* We don't build a direct scan probe request; the uCode will do
5375          * that based on the direct_mask added to each channel entry */
5376         cmd_len = iwl4965_fill_probe_req(priv, band,
5377                                         (struct ieee80211_mgmt *)scan->data,
5378                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5379
5380         scan->tx_cmd.len = cpu_to_le16(cmd_len);
5381         /* select Rx chains */
5382
5383         /* Force use of chains B and C (0x6) for scan Rx.
5384          * Avoid A (0x1) because of its off-channel reception on A-band.
5385          * MIMO is not used here, but value is required to make uCode happy. */
5386         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5387                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5388                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5389                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5390
5391         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5392                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5393
5394         if (direct_mask)
5395                 scan->channel_count =
5396                         iwl4965_get_channels_for_scan(
5397                                 priv, band, 1, /* active */
5398                                 direct_mask,
5399                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5400         else
5401                 scan->channel_count =
5402                         iwl4965_get_channels_for_scan(
5403                                 priv, band, 0, /* passive */
5404                                 direct_mask,
5405                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5406
5407         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5408                                RXON_FILTER_BCON_AWARE_MSK);
5409         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5410             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5411         cmd.data = scan;
5412         scan->len = cpu_to_le16(cmd.len);
5413
5414         set_bit(STATUS_SCAN_HW, &priv->status);
5415         ret = iwl_send_cmd_sync(priv, &cmd);
5416         if (ret)
5417                 goto done;
5418
5419         queue_delayed_work(priv->workqueue, &priv->scan_check,
5420                            IWL_SCAN_CHECK_WATCHDOG);
5421
5422         mutex_unlock(&priv->mutex);
5423         return;
5424
5425  done:
5426         /* inform mac80211 scan aborted */
5427         queue_work(priv->workqueue, &priv->scan_completed);
5428         mutex_unlock(&priv->mutex);
5429 }
5430
5431 static void iwl4965_bg_up(struct work_struct *data)
5432 {
5433         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5434
5435         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5436                 return;
5437
5438         mutex_lock(&priv->mutex);
5439         __iwl4965_up(priv);
5440         mutex_unlock(&priv->mutex);
5441 }
5442
5443 static void iwl4965_bg_restart(struct work_struct *data)
5444 {
5445         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5446
5447         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5448                 return;
5449
5450         iwl4965_down(priv);
5451         queue_work(priv->workqueue, &priv->up);
5452 }
5453
5454 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5455 {
5456         struct iwl_priv *priv =
5457             container_of(data, struct iwl_priv, rx_replenish);
5458
5459         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5460                 return;
5461
5462         mutex_lock(&priv->mutex);
5463         iwl4965_rx_replenish(priv);
5464         mutex_unlock(&priv->mutex);
5465 }
5466
5467 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5468
5469 static void iwl4965_post_associate(struct iwl_priv *priv)
5470 {
5471         struct ieee80211_conf *conf = NULL;
5472         int ret = 0;
5473         DECLARE_MAC_BUF(mac);
5474
5475         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5476                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5477                 return;
5478         }
5479
5480         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5481                         priv->assoc_id,
5482                         print_mac(mac, priv->active_rxon.bssid_addr));
5483
5484
5485         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5486                 return;
5487
5488
5489         if (!priv->vif || !priv->is_open)
5490                 return;
5491
5492         iwl4965_scan_cancel_timeout(priv, 200);
5493
5494         conf = ieee80211_get_hw_conf(priv->hw);
5495
5496         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5497         iwl4965_commit_rxon(priv);
5498
5499         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5500         iwl4965_setup_rxon_timing(priv);
5501         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5502                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5503         if (ret)
5504                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5505                             "Attempting to continue.\n");
5506
5507         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5508
5509 #ifdef CONFIG_IWL4965_HT
5510         if (priv->current_ht_config.is_ht)
5511                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5512 #endif /* CONFIG_IWL4965_HT*/
5513         iwl_set_rxon_chain(priv);
5514         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5515
5516         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5517                         priv->assoc_id, priv->beacon_int);
5518
5519         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5520                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5521         else
5522                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5523
5524         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5525                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5526                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5527                 else
5528                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5529
5530                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5531                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5532
5533         }
5534
5535         iwl4965_commit_rxon(priv);
5536
5537         switch (priv->iw_mode) {
5538         case IEEE80211_IF_TYPE_STA:
5539                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5540                 break;
5541
5542         case IEEE80211_IF_TYPE_IBSS:
5543
5544                 /* clear out the station table */
5545                 iwlcore_clear_stations_table(priv);
5546
5547                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5548                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5549                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5550                 iwl4965_send_beacon_cmd(priv);
5551
5552                 break;
5553
5554         default:
5555                 IWL_ERROR("%s Should not be called in %d mode\n",
5556                                 __FUNCTION__, priv->iw_mode);
5557                 break;
5558         }
5559
5560         iwl4965_sequence_reset(priv);
5561
5562         /* Enable Rx differential gain and sensitivity calibrations */
5563         iwl_chain_noise_reset(priv);
5564         priv->start_calib = 1;
5565
5566         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5567                 priv->assoc_station_added = 1;
5568
5569         iwl4965_activate_qos(priv, 0);
5570
5571         iwl_power_update_mode(priv, 0);
5572         /* we have just associated, don't start scan too early */
5573         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5574 }
5575
5576
5577 static void iwl4965_bg_post_associate(struct work_struct *data)
5578 {
5579         struct iwl_priv *priv = container_of(data, struct iwl_priv,
5580                                              post_associate.work);
5581
5582         mutex_lock(&priv->mutex);
5583         iwl4965_post_associate(priv);
5584         mutex_unlock(&priv->mutex);
5585
5586 }
5587
5588 static void iwl4965_bg_abort_scan(struct work_struct *work)
5589 {
5590         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5591
5592         if (!iwl_is_ready(priv))
5593                 return;
5594
5595         mutex_lock(&priv->mutex);
5596
5597         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5598         iwl4965_send_scan_abort(priv);
5599
5600         mutex_unlock(&priv->mutex);
5601 }
5602
5603 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5604
5605 static void iwl4965_bg_scan_completed(struct work_struct *work)
5606 {
5607         struct iwl_priv *priv =
5608             container_of(work, struct iwl_priv, scan_completed);
5609
5610         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5611
5612         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5613                 return;
5614
5615         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5616                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5617
5618         ieee80211_scan_completed(priv->hw);
5619
5620         /* Since setting the TXPOWER may have been deferred while
5621          * performing the scan, fire one off */
5622         mutex_lock(&priv->mutex);
5623         iwl4965_hw_reg_send_txpower(priv);
5624         mutex_unlock(&priv->mutex);
5625 }
5626
5627 /*****************************************************************************
5628  *
5629  * mac80211 entry point functions
5630  *
5631  *****************************************************************************/
5632
5633 #define UCODE_READY_TIMEOUT     (2 * HZ)
5634
5635 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5636 {
5637         struct iwl_priv *priv = hw->priv;
5638         int ret;
5639
5640         IWL_DEBUG_MAC80211("enter\n");
5641
5642         if (pci_enable_device(priv->pci_dev)) {
5643                 IWL_ERROR("Fail to pci_enable_device\n");
5644                 return -ENODEV;
5645         }
5646         pci_restore_state(priv->pci_dev);
5647         pci_enable_msi(priv->pci_dev);
5648
5649         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5650                           DRV_NAME, priv);
5651         if (ret) {
5652                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5653                 goto out_disable_msi;
5654         }
5655
5656         /* we should be verifying the device is ready to be opened */
5657         mutex_lock(&priv->mutex);
5658
5659         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5660         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5661          * ucode filename and max sizes are card-specific. */
5662
5663         if (!priv->ucode_code.len) {
5664                 ret = iwl4965_read_ucode(priv);
5665                 if (ret) {
5666                         IWL_ERROR("Could not read microcode: %d\n", ret);
5667                         mutex_unlock(&priv->mutex);
5668                         goto out_release_irq;
5669                 }
5670         }
5671
5672         ret = __iwl4965_up(priv);
5673
5674         mutex_unlock(&priv->mutex);
5675
5676         if (ret)
5677                 goto out_release_irq;
5678
5679         IWL_DEBUG_INFO("Start UP work done.\n");
5680
5681         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5682                 return 0;
5683
5684         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5685          * mac80211 will not be run successfully. */
5686         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5687                         test_bit(STATUS_READY, &priv->status),
5688                         UCODE_READY_TIMEOUT);
5689         if (!ret) {
5690                 if (!test_bit(STATUS_READY, &priv->status)) {
5691                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5692                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
5693                         ret = -ETIMEDOUT;
5694                         goto out_release_irq;
5695                 }
5696         }
5697
5698         priv->is_open = 1;
5699         IWL_DEBUG_MAC80211("leave\n");
5700         return 0;
5701
5702 out_release_irq:
5703         free_irq(priv->pci_dev->irq, priv);
5704 out_disable_msi:
5705         pci_disable_msi(priv->pci_dev);
5706         pci_disable_device(priv->pci_dev);
5707         priv->is_open = 0;
5708         IWL_DEBUG_MAC80211("leave - failed\n");
5709         return ret;
5710 }
5711
5712 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
5713 {
5714         struct iwl_priv *priv = hw->priv;
5715
5716         IWL_DEBUG_MAC80211("enter\n");
5717
5718         if (!priv->is_open) {
5719                 IWL_DEBUG_MAC80211("leave - skip\n");
5720                 return;
5721         }
5722
5723         priv->is_open = 0;
5724
5725         if (iwl_is_ready_rf(priv)) {
5726                 /* stop mac, cancel any scan request and clear
5727                  * RXON_FILTER_ASSOC_MSK BIT
5728                  */
5729                 mutex_lock(&priv->mutex);
5730                 iwl4965_scan_cancel_timeout(priv, 100);
5731                 cancel_delayed_work(&priv->post_associate);
5732                 mutex_unlock(&priv->mutex);
5733         }
5734
5735         iwl4965_down(priv);
5736
5737         flush_workqueue(priv->workqueue);
5738         free_irq(priv->pci_dev->irq, priv);
5739         pci_disable_msi(priv->pci_dev);
5740         pci_save_state(priv->pci_dev);
5741         pci_disable_device(priv->pci_dev);
5742
5743         IWL_DEBUG_MAC80211("leave\n");
5744 }
5745
5746 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
5747                       struct ieee80211_tx_control *ctl)
5748 {
5749         struct iwl_priv *priv = hw->priv;
5750
5751         IWL_DEBUG_MAC80211("enter\n");
5752
5753         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
5754                 IWL_DEBUG_MAC80211("leave - monitor\n");
5755                 return -1;
5756         }
5757
5758         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5759                      ctl->tx_rate->bitrate);
5760
5761         if (iwl4965_tx_skb(priv, skb, ctl))
5762                 dev_kfree_skb_any(skb);
5763
5764         IWL_DEBUG_MAC80211("leave\n");
5765         return 0;
5766 }
5767
5768 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
5769                                  struct ieee80211_if_init_conf *conf)
5770 {
5771         struct iwl_priv *priv = hw->priv;
5772         unsigned long flags;
5773         DECLARE_MAC_BUF(mac);
5774
5775         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5776
5777         if (priv->vif) {
5778                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5779                 return -EOPNOTSUPP;
5780         }
5781
5782         spin_lock_irqsave(&priv->lock, flags);
5783         priv->vif = conf->vif;
5784
5785         spin_unlock_irqrestore(&priv->lock, flags);
5786
5787         mutex_lock(&priv->mutex);
5788
5789         if (conf->mac_addr) {
5790                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
5791                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
5792         }
5793
5794         if (iwl_is_ready(priv))
5795                 iwl4965_set_mode(priv, conf->type);
5796
5797         mutex_unlock(&priv->mutex);
5798
5799         IWL_DEBUG_MAC80211("leave\n");
5800         return 0;
5801 }
5802
5803 /**
5804  * iwl4965_mac_config - mac80211 config callback
5805  *
5806  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
5807  * be set inappropriately and the driver currently sets the hardware up to
5808  * use it whenever needed.
5809  */
5810 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
5811 {
5812         struct iwl_priv *priv = hw->priv;
5813         const struct iwl_channel_info *ch_info;
5814         unsigned long flags;
5815         int ret = 0;
5816
5817         mutex_lock(&priv->mutex);
5818         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
5819
5820         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
5821
5822         if (!iwl_is_ready(priv)) {
5823                 IWL_DEBUG_MAC80211("leave - not ready\n");
5824                 ret = -EIO;
5825                 goto out;
5826         }
5827
5828         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
5829                      test_bit(STATUS_SCANNING, &priv->status))) {
5830                 IWL_DEBUG_MAC80211("leave - scanning\n");
5831                 set_bit(STATUS_CONF_PENDING, &priv->status);
5832                 mutex_unlock(&priv->mutex);
5833                 return 0;
5834         }
5835
5836         spin_lock_irqsave(&priv->lock, flags);
5837
5838         ch_info = iwl_get_channel_info(priv, conf->channel->band,
5839                         ieee80211_frequency_to_channel(conf->channel->center_freq));
5840         if (!is_channel_valid(ch_info)) {
5841                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
5842                 spin_unlock_irqrestore(&priv->lock, flags);
5843                 ret = -EINVAL;
5844                 goto out;
5845         }
5846
5847 #ifdef CONFIG_IWL4965_HT
5848         /* if we are switching from ht to 2.4 clear flags
5849          * from any ht related info since 2.4 does not
5850          * support ht */
5851         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
5852 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5853             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
5854 #endif
5855         )
5856                 priv->staging_rxon.flags = 0;
5857 #endif /* CONFIG_IWL4965_HT */
5858
5859         iwl_set_rxon_channel(priv, conf->channel->band,
5860                 ieee80211_frequency_to_channel(conf->channel->center_freq));
5861
5862         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
5863
5864         /* The list of supported rates and rate mask can be different
5865          * for each band; since the band may have changed, reset
5866          * the rate mask to what mac80211 lists */
5867         iwl4965_set_rate(priv);
5868
5869         spin_unlock_irqrestore(&priv->lock, flags);
5870
5871 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5872         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
5873                 iwl4965_hw_channel_switch(priv, conf->channel);
5874                 goto out;
5875         }
5876 #endif
5877
5878         if (priv->cfg->ops->lib->radio_kill_sw)
5879                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
5880
5881         if (!conf->radio_enabled) {
5882                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
5883                 goto out;
5884         }
5885
5886         if (iwl_is_rfkill(priv)) {
5887                 IWL_DEBUG_MAC80211("leave - RF kill\n");
5888                 ret = -EIO;
5889                 goto out;
5890         }
5891
5892         iwl4965_set_rate(priv);
5893
5894         if (memcmp(&priv->active_rxon,
5895                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
5896                 iwl4965_commit_rxon(priv);
5897         else
5898                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
5899
5900         IWL_DEBUG_MAC80211("leave\n");
5901
5902 out:
5903         clear_bit(STATUS_CONF_PENDING, &priv->status);
5904         mutex_unlock(&priv->mutex);
5905         return ret;
5906 }
5907
5908 static void iwl4965_config_ap(struct iwl_priv *priv)
5909 {
5910         int ret = 0;
5911
5912         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5913                 return;
5914
5915         /* The following should be done only at AP bring up */
5916         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
5917
5918                 /* RXON - unassoc (to set timing command) */
5919                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5920                 iwl4965_commit_rxon(priv);
5921
5922                 /* RXON Timing */
5923                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5924                 iwl4965_setup_rxon_timing(priv);
5925                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5926                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
5927                 if (ret)
5928                         IWL_WARNING("REPLY_RXON_TIMING failed - "
5929                                         "Attempting to continue.\n");
5930
5931                 iwl_set_rxon_chain(priv);
5932
5933                 /* FIXME: what should be the assoc_id for AP? */
5934                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5935                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5936                         priv->staging_rxon.flags |=
5937                                 RXON_FLG_SHORT_PREAMBLE_MSK;
5938                 else
5939                         priv->staging_rxon.flags &=
5940                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
5941
5942                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5943                         if (priv->assoc_capability &
5944                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
5945                                 priv->staging_rxon.flags |=
5946                                         RXON_FLG_SHORT_SLOT_MSK;
5947                         else
5948                                 priv->staging_rxon.flags &=
5949                                         ~RXON_FLG_SHORT_SLOT_MSK;
5950
5951                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5952                                 priv->staging_rxon.flags &=
5953                                         ~RXON_FLG_SHORT_SLOT_MSK;
5954                 }
5955                 /* restore RXON assoc */
5956                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5957                 iwl4965_commit_rxon(priv);
5958                 iwl4965_activate_qos(priv, 1);
5959                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5960         }
5961         iwl4965_send_beacon_cmd(priv);
5962
5963         /* FIXME - we need to add code here to detect a totally new
5964          * configuration, reset the AP, unassoc, rxon timing, assoc,
5965          * clear sta table, add BCAST sta... */
5966 }
5967
5968 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
5969                                         struct ieee80211_vif *vif,
5970                                     struct ieee80211_if_conf *conf)
5971 {
5972         struct iwl_priv *priv = hw->priv;
5973         DECLARE_MAC_BUF(mac);
5974         unsigned long flags;
5975         int rc;
5976
5977         if (conf == NULL)
5978                 return -EIO;
5979
5980         if (priv->vif != vif) {
5981                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
5982                 return 0;
5983         }
5984
5985         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
5986             (!conf->beacon || !conf->ssid_len)) {
5987                 IWL_DEBUG_MAC80211
5988                     ("Leaving in AP mode because HostAPD is not ready.\n");
5989                 return 0;
5990         }
5991
5992         if (!iwl_is_alive(priv))
5993                 return -EAGAIN;
5994
5995         mutex_lock(&priv->mutex);
5996
5997         if (conf->bssid)
5998                 IWL_DEBUG_MAC80211("bssid: %s\n",
5999                                    print_mac(mac, conf->bssid));
6000
6001 /*
6002  * very dubious code was here; the probe filtering flag is never set:
6003  *
6004         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6005             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6006  */
6007
6008         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6009                 if (!conf->bssid) {
6010                         conf->bssid = priv->mac_addr;
6011                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6012                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6013                                            print_mac(mac, conf->bssid));
6014                 }
6015                 if (priv->ibss_beacon)
6016                         dev_kfree_skb(priv->ibss_beacon);
6017
6018                 priv->ibss_beacon = conf->beacon;
6019         }
6020
6021         if (iwl_is_rfkill(priv))
6022                 goto done;
6023
6024         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6025             !is_multicast_ether_addr(conf->bssid)) {
6026                 /* If there is currently a HW scan going on in the background
6027                  * then we need to cancel it else the RXON below will fail. */
6028                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6029                         IWL_WARNING("Aborted scan still in progress "
6030                                     "after 100ms\n");
6031                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6032                         mutex_unlock(&priv->mutex);
6033                         return -EAGAIN;
6034                 }
6035                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6036
6037                 /* TODO: Audit driver for usage of these members and see
6038                  * if mac80211 deprecates them (priv->bssid looks like it
6039                  * shouldn't be there, but I haven't scanned the IBSS code
6040                  * to verify) - jpk */
6041                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6042
6043                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6044                         iwl4965_config_ap(priv);
6045                 else {
6046                         rc = iwl4965_commit_rxon(priv);
6047                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6048                                 iwl4965_rxon_add_station(
6049                                         priv, priv->active_rxon.bssid_addr, 1);
6050                 }
6051
6052         } else {
6053                 iwl4965_scan_cancel_timeout(priv, 100);
6054                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6055                 iwl4965_commit_rxon(priv);
6056         }
6057
6058  done:
6059         spin_lock_irqsave(&priv->lock, flags);
6060         if (!conf->ssid_len)
6061                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6062         else
6063                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6064
6065         priv->essid_len = conf->ssid_len;
6066         spin_unlock_irqrestore(&priv->lock, flags);
6067
6068         IWL_DEBUG_MAC80211("leave\n");
6069         mutex_unlock(&priv->mutex);
6070
6071         return 0;
6072 }
6073
6074 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6075                                  unsigned int changed_flags,
6076                                  unsigned int *total_flags,
6077                                  int mc_count, struct dev_addr_list *mc_list)
6078 {
6079         /*
6080          * XXX: dummy
6081          * see also iwl4965_connection_init_rx_config
6082          */
6083         *total_flags = 0;
6084 }
6085
6086 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6087                                      struct ieee80211_if_init_conf *conf)
6088 {
6089         struct iwl_priv *priv = hw->priv;
6090
6091         IWL_DEBUG_MAC80211("enter\n");
6092
6093         mutex_lock(&priv->mutex);
6094
6095         if (iwl_is_ready_rf(priv)) {
6096                 iwl4965_scan_cancel_timeout(priv, 100);
6097                 cancel_delayed_work(&priv->post_associate);
6098                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6099                 iwl4965_commit_rxon(priv);
6100         }
6101         if (priv->vif == conf->vif) {
6102                 priv->vif = NULL;
6103                 memset(priv->bssid, 0, ETH_ALEN);
6104                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6105                 priv->essid_len = 0;
6106         }
6107         mutex_unlock(&priv->mutex);
6108
6109         IWL_DEBUG_MAC80211("leave\n");
6110
6111 }
6112
6113 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6114 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6115                                      struct ieee80211_vif *vif,
6116                                      struct ieee80211_bss_conf *bss_conf,
6117                                      u32 changes)
6118 {
6119         struct iwl_priv *priv = hw->priv;
6120
6121         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6122
6123         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6124                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6125                                    bss_conf->use_short_preamble);
6126                 if (bss_conf->use_short_preamble)
6127                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6128                 else
6129                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6130         }
6131
6132         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6133                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6134                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6135                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6136                 else
6137                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6138         }
6139
6140         if (changes & BSS_CHANGED_HT) {
6141                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6142                 iwl4965_ht_conf(priv, bss_conf);
6143                 iwl_set_rxon_chain(priv);
6144         }
6145
6146         if (changes & BSS_CHANGED_ASSOC) {
6147                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6148                 /* This should never happen as this function should
6149                  * never be called from interrupt context. */
6150                 if (WARN_ON_ONCE(in_interrupt()))
6151                         return;
6152                 if (bss_conf->assoc) {
6153                         priv->assoc_id = bss_conf->aid;
6154                         priv->beacon_int = bss_conf->beacon_int;
6155                         priv->timestamp = bss_conf->timestamp;
6156                         priv->assoc_capability = bss_conf->assoc_capability;
6157                         priv->next_scan_jiffies = jiffies +
6158                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6159                         mutex_lock(&priv->mutex);
6160                         iwl4965_post_associate(priv);
6161                         mutex_unlock(&priv->mutex);
6162                 } else {
6163                         priv->assoc_id = 0;
6164                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6165                 }
6166         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6167                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6168                         iwl_send_rxon_assoc(priv);
6169         }
6170
6171 }
6172
6173 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6174 {
6175         int rc = 0;
6176         unsigned long flags;
6177         struct iwl_priv *priv = hw->priv;
6178
6179         IWL_DEBUG_MAC80211("enter\n");
6180
6181         mutex_lock(&priv->mutex);
6182         spin_lock_irqsave(&priv->lock, flags);
6183
6184         if (!iwl_is_ready_rf(priv)) {
6185                 rc = -EIO;
6186                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6187                 goto out_unlock;
6188         }
6189
6190         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6191                 rc = -EIO;
6192                 IWL_ERROR("ERROR: APs don't scan\n");
6193                 goto out_unlock;
6194         }
6195
6196         /* we don't schedule scan within next_scan_jiffies period */
6197         if (priv->next_scan_jiffies &&
6198                         time_after(priv->next_scan_jiffies, jiffies)) {
6199                 rc = -EAGAIN;
6200                 goto out_unlock;
6201         }
6202         /* if we just finished scan ask for delay */
6203         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6204                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
6205                 rc = -EAGAIN;
6206                 goto out_unlock;
6207         }
6208         if (len) {
6209                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6210                                iwl4965_escape_essid(ssid, len), (int)len);
6211
6212                 priv->one_direct_scan = 1;
6213                 priv->direct_ssid_len = (u8)
6214                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6215                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6216         } else
6217                 priv->one_direct_scan = 0;
6218
6219         rc = iwl4965_scan_initiate(priv);
6220
6221         IWL_DEBUG_MAC80211("leave\n");
6222
6223 out_unlock:
6224         spin_unlock_irqrestore(&priv->lock, flags);
6225         mutex_unlock(&priv->mutex);
6226
6227         return rc;
6228 }
6229
6230 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6231                         struct ieee80211_key_conf *keyconf, const u8 *addr,
6232                         u32 iv32, u16 *phase1key)
6233 {
6234         struct iwl_priv *priv = hw->priv;
6235         u8 sta_id = IWL_INVALID_STATION;
6236         unsigned long flags;
6237         __le16 key_flags = 0;
6238         int i;
6239         DECLARE_MAC_BUF(mac);
6240
6241         IWL_DEBUG_MAC80211("enter\n");
6242
6243         sta_id = iwl_find_station(priv, addr);
6244         if (sta_id == IWL_INVALID_STATION) {
6245                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6246                                    print_mac(mac, addr));
6247                 return;
6248         }
6249
6250         iwl4965_scan_cancel_timeout(priv, 100);
6251
6252         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6253         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6254         key_flags &= ~STA_KEY_FLG_INVALID;
6255
6256         if (sta_id == priv->hw_params.bcast_sta_id)
6257                 key_flags |= STA_KEY_MULTICAST_MSK;
6258
6259         spin_lock_irqsave(&priv->sta_lock, flags);
6260
6261         priv->stations[sta_id].sta.key.key_flags = key_flags;
6262         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6263
6264         for (i = 0; i < 5; i++)
6265                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6266                         cpu_to_le16(phase1key[i]);
6267
6268         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6269         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6270
6271         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6272
6273         spin_unlock_irqrestore(&priv->sta_lock, flags);
6274
6275         IWL_DEBUG_MAC80211("leave\n");
6276 }
6277
6278 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6279                            const u8 *local_addr, const u8 *addr,
6280                            struct ieee80211_key_conf *key)
6281 {
6282         struct iwl_priv *priv = hw->priv;
6283         DECLARE_MAC_BUF(mac);
6284         int ret = 0;
6285         u8 sta_id = IWL_INVALID_STATION;
6286         u8 is_default_wep_key = 0;
6287
6288         IWL_DEBUG_MAC80211("enter\n");
6289
6290         if (priv->hw_params.sw_crypto) {
6291                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6292                 return -EOPNOTSUPP;
6293         }
6294
6295         if (is_zero_ether_addr(addr))
6296                 /* only support pairwise keys */
6297                 return -EOPNOTSUPP;
6298
6299         sta_id = iwl_find_station(priv, addr);
6300         if (sta_id == IWL_INVALID_STATION) {
6301                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6302                                    print_mac(mac, addr));
6303                 return -EINVAL;
6304
6305         }
6306
6307         mutex_lock(&priv->mutex);
6308         iwl4965_scan_cancel_timeout(priv, 100);
6309         mutex_unlock(&priv->mutex);
6310
6311         /* If we are getting WEP group key and we didn't receive any key mapping
6312          * so far, we are in legacy wep mode (group key only), otherwise we are
6313          * in 1X mode.
6314          * In legacy wep mode, we use another host command to the uCode */
6315         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6316                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6317                 if (cmd == SET_KEY)
6318                         is_default_wep_key = !priv->key_mapping_key;
6319                 else
6320                         is_default_wep_key = priv->default_wep_key;
6321         }
6322
6323         switch (cmd) {
6324         case SET_KEY:
6325                 if (is_default_wep_key)
6326                         ret = iwl_set_default_wep_key(priv, key);
6327                 else
6328                         ret = iwl_set_dynamic_key(priv, key, sta_id);
6329
6330                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6331                 break;
6332         case DISABLE_KEY:
6333                 if (is_default_wep_key)
6334                         ret = iwl_remove_default_wep_key(priv, key);
6335                 else
6336                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
6337
6338                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6339                 break;
6340         default:
6341                 ret = -EINVAL;
6342         }
6343
6344         IWL_DEBUG_MAC80211("leave\n");
6345
6346         return ret;
6347 }
6348
6349 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6350                            const struct ieee80211_tx_queue_params *params)
6351 {
6352         struct iwl_priv *priv = hw->priv;
6353         unsigned long flags;
6354         int q;
6355
6356         IWL_DEBUG_MAC80211("enter\n");
6357
6358         if (!iwl_is_ready_rf(priv)) {
6359                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6360                 return -EIO;
6361         }
6362
6363         if (queue >= AC_NUM) {
6364                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6365                 return 0;
6366         }
6367
6368         if (!priv->qos_data.qos_enable) {
6369                 priv->qos_data.qos_active = 0;
6370                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6371                 return 0;
6372         }
6373         q = AC_NUM - 1 - queue;
6374
6375         spin_lock_irqsave(&priv->lock, flags);
6376
6377         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6378         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6379         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6380         priv->qos_data.def_qos_parm.ac[q].edca_txop =
6381                         cpu_to_le16((params->txop * 32));
6382
6383         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6384         priv->qos_data.qos_active = 1;
6385
6386         spin_unlock_irqrestore(&priv->lock, flags);
6387
6388         mutex_lock(&priv->mutex);
6389         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6390                 iwl4965_activate_qos(priv, 1);
6391         else if (priv->assoc_id && iwl_is_associated(priv))
6392                 iwl4965_activate_qos(priv, 0);
6393
6394         mutex_unlock(&priv->mutex);
6395
6396         IWL_DEBUG_MAC80211("leave\n");
6397         return 0;
6398 }
6399
6400 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6401                                 struct ieee80211_tx_queue_stats *stats)
6402 {
6403         struct iwl_priv *priv = hw->priv;
6404         int i, avail;
6405         struct iwl4965_tx_queue *txq;
6406         struct iwl4965_queue *q;
6407         unsigned long flags;
6408
6409         IWL_DEBUG_MAC80211("enter\n");
6410
6411         if (!iwl_is_ready_rf(priv)) {
6412                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6413                 return -EIO;
6414         }
6415
6416         spin_lock_irqsave(&priv->lock, flags);
6417
6418         for (i = 0; i < AC_NUM; i++) {
6419                 txq = &priv->txq[i];
6420                 q = &txq->q;
6421                 avail = iwl4965_queue_space(q);
6422
6423                 stats[i].len = q->n_window - avail;
6424                 stats[i].limit = q->n_window - q->high_mark;
6425                 stats[i].count = q->n_window;
6426
6427         }
6428         spin_unlock_irqrestore(&priv->lock, flags);
6429
6430         IWL_DEBUG_MAC80211("leave\n");
6431
6432         return 0;
6433 }
6434
6435 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6436                              struct ieee80211_low_level_stats *stats)
6437 {
6438         IWL_DEBUG_MAC80211("enter\n");
6439         IWL_DEBUG_MAC80211("leave\n");
6440
6441         return 0;
6442 }
6443
6444 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6445 {
6446         IWL_DEBUG_MAC80211("enter\n");
6447         IWL_DEBUG_MAC80211("leave\n");
6448
6449         return 0;
6450 }
6451
6452 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6453 {
6454         struct iwl_priv *priv = hw->priv;
6455         unsigned long flags;
6456
6457         mutex_lock(&priv->mutex);
6458         IWL_DEBUG_MAC80211("enter\n");
6459
6460         priv->lq_mngr.lq_ready = 0;
6461 #ifdef CONFIG_IWL4965_HT
6462         spin_lock_irqsave(&priv->lock, flags);
6463         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6464         spin_unlock_irqrestore(&priv->lock, flags);
6465 #endif /* CONFIG_IWL4965_HT */
6466
6467         iwl_reset_qos(priv);
6468
6469         cancel_delayed_work(&priv->post_associate);
6470
6471         spin_lock_irqsave(&priv->lock, flags);
6472         priv->assoc_id = 0;
6473         priv->assoc_capability = 0;
6474         priv->assoc_station_added = 0;
6475
6476         /* new association get rid of ibss beacon skb */
6477         if (priv->ibss_beacon)
6478                 dev_kfree_skb(priv->ibss_beacon);
6479
6480         priv->ibss_beacon = NULL;
6481
6482         priv->beacon_int = priv->hw->conf.beacon_int;
6483         priv->timestamp = 0;
6484         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6485                 priv->beacon_int = 0;
6486
6487         spin_unlock_irqrestore(&priv->lock, flags);
6488
6489         if (!iwl_is_ready_rf(priv)) {
6490                 IWL_DEBUG_MAC80211("leave - not ready\n");
6491                 mutex_unlock(&priv->mutex);
6492                 return;
6493         }
6494
6495         /* we are restarting association process
6496          * clear RXON_FILTER_ASSOC_MSK bit
6497          */
6498         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6499                 iwl4965_scan_cancel_timeout(priv, 100);
6500                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6501                 iwl4965_commit_rxon(priv);
6502         }
6503
6504         iwl_power_update_mode(priv, 0);
6505
6506         /* Per mac80211.h: This is only used in IBSS mode... */
6507         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6508
6509                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6510                 mutex_unlock(&priv->mutex);
6511                 return;
6512         }
6513
6514         iwl4965_set_rate(priv);
6515
6516         mutex_unlock(&priv->mutex);
6517
6518         IWL_DEBUG_MAC80211("leave\n");
6519 }
6520
6521 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
6522                                  struct ieee80211_tx_control *control)
6523 {
6524         struct iwl_priv *priv = hw->priv;
6525         unsigned long flags;
6526
6527         mutex_lock(&priv->mutex);
6528         IWL_DEBUG_MAC80211("enter\n");
6529
6530         if (!iwl_is_ready_rf(priv)) {
6531                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6532                 mutex_unlock(&priv->mutex);
6533                 return -EIO;
6534         }
6535
6536         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6537                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6538                 mutex_unlock(&priv->mutex);
6539                 return -EIO;
6540         }
6541
6542         spin_lock_irqsave(&priv->lock, flags);
6543
6544         if (priv->ibss_beacon)
6545                 dev_kfree_skb(priv->ibss_beacon);
6546
6547         priv->ibss_beacon = skb;
6548
6549         priv->assoc_id = 0;
6550
6551         IWL_DEBUG_MAC80211("leave\n");
6552         spin_unlock_irqrestore(&priv->lock, flags);
6553
6554         iwl_reset_qos(priv);
6555
6556         queue_work(priv->workqueue, &priv->post_associate.work);
6557
6558         mutex_unlock(&priv->mutex);
6559
6560         return 0;
6561 }
6562
6563 /*****************************************************************************
6564  *
6565  * sysfs attributes
6566  *
6567  *****************************************************************************/
6568
6569 #ifdef CONFIG_IWLWIFI_DEBUG
6570
6571 /*
6572  * The following adds a new attribute to the sysfs representation
6573  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6574  * used for controlling the debug level.
6575  *
6576  * See the level definitions in iwl for details.
6577  */
6578
6579 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6580 {
6581         return sprintf(buf, "0x%08X\n", iwl_debug_level);
6582 }
6583 static ssize_t store_debug_level(struct device_driver *d,
6584                                  const char *buf, size_t count)
6585 {
6586         char *p = (char *)buf;
6587         u32 val;
6588
6589         val = simple_strtoul(p, &p, 0);
6590         if (p == buf)
6591                 printk(KERN_INFO DRV_NAME
6592                        ": %s is not in hex or decimal form.\n", buf);
6593         else
6594                 iwl_debug_level = val;
6595
6596         return strnlen(buf, count);
6597 }
6598
6599 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6600                    show_debug_level, store_debug_level);
6601
6602 #endif /* CONFIG_IWLWIFI_DEBUG */
6603
6604
6605 static ssize_t show_temperature(struct device *d,
6606                                 struct device_attribute *attr, char *buf)
6607 {
6608         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6609
6610         if (!iwl_is_alive(priv))
6611                 return -EAGAIN;
6612
6613         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6614 }
6615
6616 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6617
6618 static ssize_t show_rs_window(struct device *d,
6619                               struct device_attribute *attr,
6620                               char *buf)
6621 {
6622         struct iwl_priv *priv = d->driver_data;
6623         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
6624 }
6625 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
6626
6627 static ssize_t show_tx_power(struct device *d,
6628                              struct device_attribute *attr, char *buf)
6629 {
6630         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6631         return sprintf(buf, "%d\n", priv->user_txpower_limit);
6632 }
6633
6634 static ssize_t store_tx_power(struct device *d,
6635                               struct device_attribute *attr,
6636                               const char *buf, size_t count)
6637 {
6638         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6639         char *p = (char *)buf;
6640         u32 val;
6641
6642         val = simple_strtoul(p, &p, 10);
6643         if (p == buf)
6644                 printk(KERN_INFO DRV_NAME
6645                        ": %s is not in decimal form.\n", buf);
6646         else
6647                 iwl4965_hw_reg_set_txpower(priv, val);
6648
6649         return count;
6650 }
6651
6652 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6653
6654 static ssize_t show_flags(struct device *d,
6655                           struct device_attribute *attr, char *buf)
6656 {
6657         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6658
6659         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
6660 }
6661
6662 static ssize_t store_flags(struct device *d,
6663                            struct device_attribute *attr,
6664                            const char *buf, size_t count)
6665 {
6666         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6667         u32 flags = simple_strtoul(buf, NULL, 0);
6668
6669         mutex_lock(&priv->mutex);
6670         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
6671                 /* Cancel any currently running scans... */
6672                 if (iwl4965_scan_cancel_timeout(priv, 100))
6673                         IWL_WARNING("Could not cancel scan.\n");
6674                 else {
6675                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6676                                        flags);
6677                         priv->staging_rxon.flags = cpu_to_le32(flags);
6678                         iwl4965_commit_rxon(priv);
6679                 }
6680         }
6681         mutex_unlock(&priv->mutex);
6682
6683         return count;
6684 }
6685
6686 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6687
6688 static ssize_t show_filter_flags(struct device *d,
6689                                  struct device_attribute *attr, char *buf)
6690 {
6691         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6692
6693         return sprintf(buf, "0x%04X\n",
6694                 le32_to_cpu(priv->active_rxon.filter_flags));
6695 }
6696
6697 static ssize_t store_filter_flags(struct device *d,
6698                                   struct device_attribute *attr,
6699                                   const char *buf, size_t count)
6700 {
6701         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6702         u32 filter_flags = simple_strtoul(buf, NULL, 0);
6703
6704         mutex_lock(&priv->mutex);
6705         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
6706                 /* Cancel any currently running scans... */
6707                 if (iwl4965_scan_cancel_timeout(priv, 100))
6708                         IWL_WARNING("Could not cancel scan.\n");
6709                 else {
6710                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
6711                                        "0x%04X\n", filter_flags);
6712                         priv->staging_rxon.filter_flags =
6713                                 cpu_to_le32(filter_flags);
6714                         iwl4965_commit_rxon(priv);
6715                 }
6716         }
6717         mutex_unlock(&priv->mutex);
6718
6719         return count;
6720 }
6721
6722 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
6723                    store_filter_flags);
6724
6725 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
6726
6727 static ssize_t show_measurement(struct device *d,
6728                                 struct device_attribute *attr, char *buf)
6729 {
6730         struct iwl_priv *priv = dev_get_drvdata(d);
6731         struct iwl4965_spectrum_notification measure_report;
6732         u32 size = sizeof(measure_report), len = 0, ofs = 0;
6733         u8 *data = (u8 *) & measure_report;
6734         unsigned long flags;
6735
6736         spin_lock_irqsave(&priv->lock, flags);
6737         if (!(priv->measurement_status & MEASUREMENT_READY)) {
6738                 spin_unlock_irqrestore(&priv->lock, flags);
6739                 return 0;
6740         }
6741         memcpy(&measure_report, &priv->measure_report, size);
6742         priv->measurement_status = 0;
6743         spin_unlock_irqrestore(&priv->lock, flags);
6744
6745         while (size && (PAGE_SIZE - len)) {
6746                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6747                                    PAGE_SIZE - len, 1);
6748                 len = strlen(buf);
6749                 if (PAGE_SIZE - len)
6750                         buf[len++] = '\n';
6751
6752                 ofs += 16;
6753                 size -= min(size, 16U);
6754         }
6755
6756         return len;
6757 }
6758
6759 static ssize_t store_measurement(struct device *d,
6760                                  struct device_attribute *attr,
6761                                  const char *buf, size_t count)
6762 {
6763         struct iwl_priv *priv = dev_get_drvdata(d);
6764         struct ieee80211_measurement_params params = {
6765                 .channel = le16_to_cpu(priv->active_rxon.channel),
6766                 .start_time = cpu_to_le64(priv->last_tsf),
6767                 .duration = cpu_to_le16(1),
6768         };
6769         u8 type = IWL_MEASURE_BASIC;
6770         u8 buffer[32];
6771         u8 channel;
6772
6773         if (count) {
6774                 char *p = buffer;
6775                 strncpy(buffer, buf, min(sizeof(buffer), count));
6776                 channel = simple_strtoul(p, NULL, 0);
6777                 if (channel)
6778                         params.channel = channel;
6779
6780                 p = buffer;
6781                 while (*p && *p != ' ')
6782                         p++;
6783                 if (*p)
6784                         type = simple_strtoul(p + 1, NULL, 0);
6785         }
6786
6787         IWL_DEBUG_INFO("Invoking measurement of type %d on "
6788                        "channel %d (for '%s')\n", type, params.channel, buf);
6789         iwl4965_get_measurement(priv, &params, type);
6790
6791         return count;
6792 }
6793
6794 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
6795                    show_measurement, store_measurement);
6796 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
6797
6798 static ssize_t store_retry_rate(struct device *d,
6799                                 struct device_attribute *attr,
6800                                 const char *buf, size_t count)
6801 {
6802         struct iwl_priv *priv = dev_get_drvdata(d);
6803
6804         priv->retry_rate = simple_strtoul(buf, NULL, 0);
6805         if (priv->retry_rate <= 0)
6806                 priv->retry_rate = 1;
6807
6808         return count;
6809 }
6810
6811 static ssize_t show_retry_rate(struct device *d,
6812                                struct device_attribute *attr, char *buf)
6813 {
6814         struct iwl_priv *priv = dev_get_drvdata(d);
6815         return sprintf(buf, "%d", priv->retry_rate);
6816 }
6817
6818 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
6819                    store_retry_rate);
6820
6821 static ssize_t store_power_level(struct device *d,
6822                                  struct device_attribute *attr,
6823                                  const char *buf, size_t count)
6824 {
6825         struct iwl_priv *priv = dev_get_drvdata(d);
6826         int rc;
6827         int mode;
6828
6829         mode = simple_strtoul(buf, NULL, 0);
6830         mutex_lock(&priv->mutex);
6831
6832         if (!iwl_is_ready(priv)) {
6833                 rc = -EAGAIN;
6834                 goto out;
6835         }
6836
6837         rc = iwl_power_set_user_mode(priv, mode);
6838         if (rc) {
6839                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
6840                 goto out;
6841         }
6842         rc = count;
6843
6844  out:
6845         mutex_unlock(&priv->mutex);
6846         return rc;
6847 }
6848
6849 #define MAX_WX_STRING 80
6850
6851 /* Values are in microsecond */
6852 static const s32 timeout_duration[] = {
6853         350000,
6854         250000,
6855         75000,
6856         37000,
6857         25000,
6858 };
6859 static const s32 period_duration[] = {
6860         400000,
6861         700000,
6862         1000000,
6863         1000000,
6864         1000000
6865 };
6866
6867 static ssize_t show_power_level(struct device *d,
6868                                 struct device_attribute *attr, char *buf)
6869 {
6870         struct iwl_priv *priv = dev_get_drvdata(d);
6871         int level = priv->power_data.power_mode;
6872         char *p = buf;
6873
6874         p += sprintf(p, "%d ", level);
6875         switch (level) {
6876         case IWL_POWER_MODE_CAM:
6877         case IWL_POWER_AC:
6878                 p += sprintf(p, "(AC)");
6879                 break;
6880         case IWL_POWER_BATTERY:
6881                 p += sprintf(p, "(BATTERY)");
6882                 break;
6883         default:
6884                 p += sprintf(p,
6885                              "(Timeout %dms, Period %dms)",
6886                              timeout_duration[level - 1] / 1000,
6887                              period_duration[level - 1] / 1000);
6888         }
6889 /*
6890         if (!(priv->power_mode & IWL_POWER_ENABLED))
6891                 p += sprintf(p, " OFF\n");
6892         else
6893                 p += sprintf(p, " \n");
6894 */
6895         p += sprintf(p, " \n");
6896         return (p - buf + 1);
6897 }
6898
6899 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
6900                    store_power_level);
6901
6902 static ssize_t show_channels(struct device *d,
6903                              struct device_attribute *attr, char *buf)
6904 {
6905         /* all this shit doesn't belong into sysfs anyway */
6906         return 0;
6907 }
6908
6909 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
6910
6911 static ssize_t show_statistics(struct device *d,
6912                                struct device_attribute *attr, char *buf)
6913 {
6914         struct iwl_priv *priv = dev_get_drvdata(d);
6915         u32 size = sizeof(struct iwl4965_notif_statistics);
6916         u32 len = 0, ofs = 0;
6917         u8 *data = (u8 *) & priv->statistics;
6918         int rc = 0;
6919
6920         if (!iwl_is_alive(priv))
6921                 return -EAGAIN;
6922
6923         mutex_lock(&priv->mutex);
6924         rc = iwl_send_statistics_request(priv, 0);
6925         mutex_unlock(&priv->mutex);
6926
6927         if (rc) {
6928                 len = sprintf(buf,
6929                               "Error sending statistics request: 0x%08X\n", rc);
6930                 return len;
6931         }
6932
6933         while (size && (PAGE_SIZE - len)) {
6934                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6935                                    PAGE_SIZE - len, 1);
6936                 len = strlen(buf);
6937                 if (PAGE_SIZE - len)
6938                         buf[len++] = '\n';
6939
6940                 ofs += 16;
6941                 size -= min(size, 16U);
6942         }
6943
6944         return len;
6945 }
6946
6947 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
6948
6949 static ssize_t show_status(struct device *d,
6950                            struct device_attribute *attr, char *buf)
6951 {
6952         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6953         if (!iwl_is_alive(priv))
6954                 return -EAGAIN;
6955         return sprintf(buf, "0x%08x\n", (int)priv->status);
6956 }
6957
6958 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
6959
6960 static ssize_t dump_error_log(struct device *d,
6961                               struct device_attribute *attr,
6962                               const char *buf, size_t count)
6963 {
6964         char *p = (char *)buf;
6965
6966         if (p[0] == '1')
6967                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
6968
6969         return strnlen(buf, count);
6970 }
6971
6972 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
6973
6974 static ssize_t dump_event_log(struct device *d,
6975                               struct device_attribute *attr,
6976                               const char *buf, size_t count)
6977 {
6978         char *p = (char *)buf;
6979
6980         if (p[0] == '1')
6981                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
6982
6983         return strnlen(buf, count);
6984 }
6985
6986 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
6987
6988 /*****************************************************************************
6989  *
6990  * driver setup and teardown
6991  *
6992  *****************************************************************************/
6993
6994 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
6995 {
6996         priv->workqueue = create_workqueue(DRV_NAME);
6997
6998         init_waitqueue_head(&priv->wait_command_queue);
6999
7000         INIT_WORK(&priv->up, iwl4965_bg_up);
7001         INIT_WORK(&priv->restart, iwl4965_bg_restart);
7002         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7003         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7004         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7005         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7006         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7007         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7008         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7009         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7010         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7011         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7012
7013         iwl4965_hw_setup_deferred_work(priv);
7014
7015         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7016                      iwl4965_irq_tasklet, (unsigned long)priv);
7017 }
7018
7019 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7020 {
7021         iwl4965_hw_cancel_deferred_work(priv);
7022
7023         cancel_delayed_work_sync(&priv->init_alive_start);
7024         cancel_delayed_work(&priv->scan_check);
7025         cancel_delayed_work(&priv->alive_start);
7026         cancel_delayed_work(&priv->post_associate);
7027         cancel_work_sync(&priv->beacon_update);
7028 }
7029
7030 static struct attribute *iwl4965_sysfs_entries[] = {
7031         &dev_attr_channels.attr,
7032         &dev_attr_dump_errors.attr,
7033         &dev_attr_dump_events.attr,
7034         &dev_attr_flags.attr,
7035         &dev_attr_filter_flags.attr,
7036 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7037         &dev_attr_measurement.attr,
7038 #endif
7039         &dev_attr_power_level.attr,
7040         &dev_attr_retry_rate.attr,
7041         &dev_attr_rs_window.attr,
7042         &dev_attr_statistics.attr,
7043         &dev_attr_status.attr,
7044         &dev_attr_temperature.attr,
7045         &dev_attr_tx_power.attr,
7046
7047         NULL
7048 };
7049
7050 static struct attribute_group iwl4965_attribute_group = {
7051         .name = NULL,           /* put in device directory */
7052         .attrs = iwl4965_sysfs_entries,
7053 };
7054
7055 static struct ieee80211_ops iwl4965_hw_ops = {
7056         .tx = iwl4965_mac_tx,
7057         .start = iwl4965_mac_start,
7058         .stop = iwl4965_mac_stop,
7059         .add_interface = iwl4965_mac_add_interface,
7060         .remove_interface = iwl4965_mac_remove_interface,
7061         .config = iwl4965_mac_config,
7062         .config_interface = iwl4965_mac_config_interface,
7063         .configure_filter = iwl4965_configure_filter,
7064         .set_key = iwl4965_mac_set_key,
7065         .update_tkip_key = iwl4965_mac_update_tkip_key,
7066         .get_stats = iwl4965_mac_get_stats,
7067         .get_tx_stats = iwl4965_mac_get_tx_stats,
7068         .conf_tx = iwl4965_mac_conf_tx,
7069         .get_tsf = iwl4965_mac_get_tsf,
7070         .reset_tsf = iwl4965_mac_reset_tsf,
7071         .beacon_update = iwl4965_mac_beacon_update,
7072         .bss_info_changed = iwl4965_bss_info_changed,
7073 #ifdef CONFIG_IWL4965_HT
7074         .ampdu_action = iwl4965_mac_ampdu_action,
7075 #endif  /* CONFIG_IWL4965_HT */
7076         .hw_scan = iwl4965_mac_hw_scan
7077 };
7078
7079 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7080 {
7081         int err = 0;
7082         struct iwl_priv *priv;
7083         struct ieee80211_hw *hw;
7084         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7085         unsigned long flags;
7086         DECLARE_MAC_BUF(mac);
7087
7088         /************************
7089          * 1. Allocating HW data
7090          ************************/
7091
7092         /* Disabling hardware scan means that mac80211 will perform scans
7093          * "the hard way", rather than using device's scan. */
7094         if (cfg->mod_params->disable_hw_scan) {
7095                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7096                 iwl4965_hw_ops.hw_scan = NULL;
7097         }
7098
7099         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7100         if (!hw) {
7101                 err = -ENOMEM;
7102                 goto out;
7103         }
7104         priv = hw->priv;
7105         /* At this point both hw and priv are allocated. */
7106
7107         SET_IEEE80211_DEV(hw, &pdev->dev);
7108
7109         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7110         priv->cfg = cfg;
7111         priv->pci_dev = pdev;
7112
7113 #ifdef CONFIG_IWLWIFI_DEBUG
7114         iwl_debug_level = priv->cfg->mod_params->debug;
7115         atomic_set(&priv->restrict_refcnt, 0);
7116 #endif
7117
7118         /**************************
7119          * 2. Initializing PCI bus
7120          **************************/
7121         if (pci_enable_device(pdev)) {
7122                 err = -ENODEV;
7123                 goto out_ieee80211_free_hw;
7124         }
7125
7126         pci_set_master(pdev);
7127
7128         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
7129         if (!err)
7130                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
7131         if (err) {
7132                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7133                 if (!err)
7134                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7135                 /* both attempts failed: */
7136                 if (err) {
7137                         printk(KERN_WARNING "%s: No suitable DMA available.\n",
7138                                 DRV_NAME);
7139                         goto out_pci_disable_device;
7140                 }
7141         }
7142
7143         err = pci_request_regions(pdev, DRV_NAME);
7144         if (err)
7145                 goto out_pci_disable_device;
7146
7147         pci_set_drvdata(pdev, priv);
7148
7149         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7150          * PCI Tx retries from interfering with C3 CPU state */
7151         pci_write_config_byte(pdev, 0x41, 0x00);
7152
7153         /***********************
7154          * 3. Read REV register
7155          ***********************/
7156         priv->hw_base = pci_iomap(pdev, 0, 0);
7157         if (!priv->hw_base) {
7158                 err = -ENODEV;
7159                 goto out_pci_release_regions;
7160         }
7161
7162         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7163                 (unsigned long long) pci_resource_len(pdev, 0));
7164         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7165
7166         iwl_hw_detect(priv);
7167         printk(KERN_INFO DRV_NAME
7168                 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
7169                 priv->cfg->name, priv->hw_rev);
7170
7171         /* amp init */
7172         err = priv->cfg->ops->lib->apm_ops.init(priv);
7173         if (err < 0) {
7174                 IWL_DEBUG_INFO("Failed to init APMG\n");
7175                 goto out_iounmap;
7176         }
7177         /*****************
7178          * 4. Read EEPROM
7179          *****************/
7180         /* Read the EEPROM */
7181         err = iwl_eeprom_init(priv);
7182         if (err) {
7183                 IWL_ERROR("Unable to init EEPROM\n");
7184                 goto out_iounmap;
7185         }
7186         err = iwl_eeprom_check_version(priv);
7187         if (err)
7188                 goto out_iounmap;
7189
7190         /* MAC Address location in EEPROM same for 3945/4965 */
7191         iwl_eeprom_get_mac(priv, priv->mac_addr);
7192         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7193         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7194
7195         /************************
7196          * 5. Setup HW constants
7197          ************************/
7198         /* Device-specific setup */
7199         if (priv->cfg->ops->lib->set_hw_params(priv)) {
7200                 IWL_ERROR("failed to set hw parameters\n");
7201                 goto out_free_eeprom;
7202         }
7203
7204         /*******************
7205          * 6. Setup hw/priv
7206          *******************/
7207
7208         err = iwl_setup(priv);
7209         if (err)
7210                 goto out_free_eeprom;
7211         /* At this point both hw and priv are initialized. */
7212
7213         /**********************************
7214          * 7. Initialize module parameters
7215          **********************************/
7216
7217         /* Disable radio (SW RF KILL) via parameter when loading driver */
7218         if (priv->cfg->mod_params->disable) {
7219                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7220                 IWL_DEBUG_INFO("Radio disabled.\n");
7221         }
7222
7223         if (priv->cfg->mod_params->enable_qos)
7224                 priv->qos_data.qos_enable = 1;
7225
7226         /********************
7227          * 8. Setup services
7228          ********************/
7229         spin_lock_irqsave(&priv->lock, flags);
7230         iwl4965_disable_interrupts(priv);
7231         spin_unlock_irqrestore(&priv->lock, flags);
7232
7233         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7234         if (err) {
7235                 IWL_ERROR("failed to create sysfs device attributes\n");
7236                 goto out_free_eeprom;
7237         }
7238
7239         err = iwl_dbgfs_register(priv, DRV_NAME);
7240         if (err) {
7241                 IWL_ERROR("failed to create debugfs files\n");
7242                 goto out_remove_sysfs;
7243         }
7244
7245         iwl4965_setup_deferred_work(priv);
7246         iwl4965_setup_rx_handlers(priv);
7247
7248         /********************
7249          * 9. Conclude
7250          ********************/
7251         pci_save_state(pdev);
7252         pci_disable_device(pdev);
7253
7254         /* notify iwlcore to init */
7255         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7256         return 0;
7257
7258  out_remove_sysfs:
7259         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7260  out_free_eeprom:
7261         iwl_eeprom_free(priv);
7262  out_iounmap:
7263         pci_iounmap(pdev, priv->hw_base);
7264  out_pci_release_regions:
7265         pci_release_regions(pdev);
7266         pci_set_drvdata(pdev, NULL);
7267  out_pci_disable_device:
7268         pci_disable_device(pdev);
7269  out_ieee80211_free_hw:
7270         ieee80211_free_hw(priv->hw);
7271  out:
7272         return err;
7273 }
7274
7275 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7276 {
7277         struct iwl_priv *priv = pci_get_drvdata(pdev);
7278         struct list_head *p, *q;
7279         int i;
7280         unsigned long flags;
7281
7282         if (!priv)
7283                 return;
7284
7285         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7286
7287         if (priv->mac80211_registered) {
7288                 ieee80211_unregister_hw(priv->hw);
7289                 priv->mac80211_registered = 0;
7290         }
7291
7292         set_bit(STATUS_EXIT_PENDING, &priv->status);
7293
7294         iwl4965_down(priv);
7295
7296         /* make sure we flush any pending irq or
7297          * tasklet for the driver
7298          */
7299         spin_lock_irqsave(&priv->lock, flags);
7300         iwl4965_disable_interrupts(priv);
7301         spin_unlock_irqrestore(&priv->lock, flags);
7302
7303         iwl_synchronize_irq(priv);
7304
7305         /* Free MAC hash list for ADHOC */
7306         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7307                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7308                         list_del(p);
7309                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7310                 }
7311         }
7312
7313         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7314         iwl_dbgfs_unregister(priv);
7315         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7316
7317         iwl4965_dealloc_ucode_pci(priv);
7318
7319         if (priv->rxq.bd)
7320                 iwl4965_rx_queue_free(priv, &priv->rxq);
7321         iwl4965_hw_txq_ctx_free(priv);
7322
7323         iwlcore_clear_stations_table(priv);
7324         iwl_eeprom_free(priv);
7325
7326
7327         /*netif_stop_queue(dev); */
7328         flush_workqueue(priv->workqueue);
7329
7330         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7331          * priv->workqueue... so we can't take down the workqueue
7332          * until now... */
7333         destroy_workqueue(priv->workqueue);
7334         priv->workqueue = NULL;
7335
7336         pci_iounmap(pdev, priv->hw_base);
7337         pci_release_regions(pdev);
7338         pci_disable_device(pdev);
7339         pci_set_drvdata(pdev, NULL);
7340
7341         iwl_free_channel_map(priv);
7342         iwlcore_free_geos(priv);
7343
7344         if (priv->ibss_beacon)
7345                 dev_kfree_skb(priv->ibss_beacon);
7346
7347         ieee80211_free_hw(priv->hw);
7348 }
7349
7350 #ifdef CONFIG_PM
7351
7352 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7353 {
7354         struct iwl_priv *priv = pci_get_drvdata(pdev);
7355
7356         if (priv->is_open) {
7357                 set_bit(STATUS_IN_SUSPEND, &priv->status);
7358                 iwl4965_mac_stop(priv->hw);
7359                 priv->is_open = 1;
7360         }
7361
7362         pci_set_power_state(pdev, PCI_D3hot);
7363
7364         return 0;
7365 }
7366
7367 static int iwl4965_pci_resume(struct pci_dev *pdev)
7368 {
7369         struct iwl_priv *priv = pci_get_drvdata(pdev);
7370
7371         pci_set_power_state(pdev, PCI_D0);
7372
7373         if (priv->is_open)
7374                 iwl4965_mac_start(priv->hw);
7375
7376         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7377         return 0;
7378 }
7379
7380 #endif /* CONFIG_PM */
7381
7382 /*****************************************************************************
7383  *
7384  * driver and module entry point
7385  *
7386  *****************************************************************************/
7387
7388 /* Hardware specific file defines the PCI IDs table for that hardware module */
7389 static struct pci_device_id iwl_hw_card_ids[] = {
7390         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7391         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7392 #ifdef CONFIG_IWL5000
7393         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
7394         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
7395         {IWL_PCI_DEVICE(0x423A, PCI_ANY_ID, iwl5350_agn_cfg)},
7396 #endif /* CONFIG_IWL5000 */
7397         {0}
7398 };
7399 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7400
7401 static struct pci_driver iwl_driver = {
7402         .name = DRV_NAME,
7403         .id_table = iwl_hw_card_ids,
7404         .probe = iwl4965_pci_probe,
7405         .remove = __devexit_p(iwl4965_pci_remove),
7406 #ifdef CONFIG_PM
7407         .suspend = iwl4965_pci_suspend,
7408         .resume = iwl4965_pci_resume,
7409 #endif
7410 };
7411
7412 static int __init iwl4965_init(void)
7413 {
7414
7415         int ret;
7416         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7417         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7418
7419         ret = iwl4965_rate_control_register();
7420         if (ret) {
7421                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7422                 return ret;
7423         }
7424
7425         ret = pci_register_driver(&iwl_driver);
7426         if (ret) {
7427                 IWL_ERROR("Unable to initialize PCI module\n");
7428                 goto error_register;
7429         }
7430 #ifdef CONFIG_IWLWIFI_DEBUG
7431         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7432         if (ret) {
7433                 IWL_ERROR("Unable to create driver sysfs file\n");
7434                 goto error_debug;
7435         }
7436 #endif
7437
7438         return ret;
7439
7440 #ifdef CONFIG_IWLWIFI_DEBUG
7441 error_debug:
7442         pci_unregister_driver(&iwl_driver);
7443 #endif
7444 error_register:
7445         iwl4965_rate_control_unregister();
7446         return ret;
7447 }
7448
7449 static void __exit iwl4965_exit(void)
7450 {
7451 #ifdef CONFIG_IWLWIFI_DEBUG
7452         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7453 #endif
7454         pci_unregister_driver(&iwl_driver);
7455         iwl4965_rate_control_unregister();
7456 }
7457
7458 module_exit(iwl4965_exit);
7459 module_init(iwl4965_init);