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