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
 149 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 150  * DMA services
 151  *
 152  * Theory of operation
 153  *
 154  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 155  * of buffer descriptors, each of which points to one or more data buffers for
 156  * the device to read from or fill.  Driver and device exchange status of each
 157  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 158  * entries in each circular buffer, to protect against confusing empty and full
 159  * queue states.
 160  *
 161  * The device reads or writes the data in the queues via the device's several
 162  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 163  *
 164  * For Tx queue, there are low mark and high mark limits. If, after queuing
 165  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 166  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 167  * Tx queue resumed.
 168  *
 169  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 170  * queue (#4) for sending commands to the device firmware, and 15 other
 171  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 172  *
 173  * See more detailed info in iwl-4965-hw.h.
 174  ***************************************************/
 175
 176 int iwl4965_queue_space(const struct iwl4965_queue *q)
 177 {
 178         int s = q->read_ptr - q->write_ptr;
 179
 180         if (q->read_ptr > q->write_ptr)
 181                 s -= q->n_bd;
 182
 183         if (s <= 0)
 184                 s += q->n_window;
 185         /* keep some reserve to not confuse empty and full situations */
 186         s -= 2;
 187         if (s < 0)
 188                 s = 0;
 189         return s;
 190 }
 191
 192
 193 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 194 {
 195         return q->write_ptr > q->read_ptr ?
 196                 (i >= q->read_ptr && i < q->write_ptr) :
 197                 !(i < q->read_ptr && i >= q->write_ptr);
 198 }
 199
 200 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 201 {
 202         /* This is for scan command, the big buffer at end of command array */
 203         if (is_huge)
 204                 return q->n_window;     /* must be power of 2 */
 205
 206         /* Otherwise, use normal size buffers */
 207         return index & (q->n_window - 1);
 208 }
 209
 210 /**
 211  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 212  */
 213 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
 214                           int count, int slots_num, u32 id)
 215 {
 216         q->n_bd = count;
 217         q->n_window = slots_num;
 218         q->id = id;
 219
 220         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 221          * and iwl_queue_dec_wrap are broken. */
 222         BUG_ON(!is_power_of_2(count));
 223
 224         /* slots_num must be power-of-two size, otherwise
 225          * get_cmd_index is broken. */
 226         BUG_ON(!is_power_of_2(slots_num));
 227
 228         q->low_mark = q->n_window / 4;
 229         if (q->low_mark < 4)
 230                 q->low_mark = 4;
 231
 232         q->high_mark = q->n_window / 8;
 233         if (q->high_mark < 2)
 234                 q->high_mark = 2;
 235
 236         q->write_ptr = q->read_ptr = 0;
 237
 238         return 0;
 239 }
 240
 241 /**
 242  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 243  */
 244 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
 245                               struct iwl4965_tx_queue *txq, u32 id)
 246 {
 247         struct pci_dev *dev = priv->pci_dev;
 248
 249         /* Driver private data, only for Tx (not command) queues,
 250          * not shared with device. */
 251         if (id != IWL_CMD_QUEUE_NUM) {
 252                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 253                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 254                 if (!txq->txb) {
 255                         IWL_ERROR("kmalloc for auxiliary BD "
 256                                   "structures failed\n");
 257                         goto error;
 258                 }
 259         } else
 260                 txq->txb = NULL;
 261
 262         /* Circular buffer of transmit frame descriptors (TFDs),
 263          * shared with device */
 264         txq->bd = pci_alloc_consistent(dev,
 265                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 266                         &txq->q.dma_addr);
 267
 268         if (!txq->bd) {
 269                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 270                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 271                 goto error;
 272         }
 273         txq->q.id = id;
 274
 275         return 0;
 276
 277  error:
 278         if (txq->txb) {
 279                 kfree(txq->txb);
 280                 txq->txb = NULL;
 281         }
 282
 283         return -ENOMEM;
 284 }
 285
 286 /**
 287  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 288  */
 289 int iwl4965_tx_queue_init(struct iwl_priv *priv,
 290                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 291 {
 292         struct pci_dev *dev = priv->pci_dev;
 293         int len;
 294         int rc = 0;
 295
 296         /*
 297          * Alloc buffer array for commands (Tx or other types of commands).
 298          * For the command queue (#4), allocate command space + one big
 299          * command for scan, since scan command is very huge; the system will
 300          * not have two scans at the same time, so only one is needed.
 301          * For normal Tx queues (all other queues), no super-size command
 302          * space is needed.
 303          */
 304         len = sizeof(struct iwl_cmd) * slots_num;
 305         if (txq_id == IWL_CMD_QUEUE_NUM)
 306                 len +=  IWL_MAX_SCAN_SIZE;
 307         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 308         if (!txq->cmd)
 309                 return -ENOMEM;
 310
 311         /* Alloc driver data array and TFD circular buffer */
 312         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 313         if (rc) {
 314                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 315
 316                 return -ENOMEM;
 317         }
 318         txq->need_update = 0;
 319
 320         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 321          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 322         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 323
 324         /* Initialize queue's high/low-water marks, and head/tail indexes */
 325         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 326
 327         /* Tell device where to find queue */
 328         iwl4965_hw_tx_queue_init(priv, txq);
 329
 330         return 0;
 331 }
 332
 333 /**
 334  * iwl4965_tx_queue_free - Deallocate DMA queue.
 335  * @txq: Transmit queue to deallocate.
 336  *
 337  * Empty queue by removing and destroying all BD's.
 338  * Free all buffers.
 339  * 0-fill, but do not free "txq" descriptor structure.
 340  */
 341 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
 342 {
 343         struct iwl4965_queue *q = &txq->q;
 344         struct pci_dev *dev = priv->pci_dev;
 345         int len;
 346
 347         if (q->n_bd == 0)
 348                 return;
 349
 350         /* first, empty all BD's */
 351         for (; q->write_ptr != q->read_ptr;
 352              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 353                 iwl4965_hw_txq_free_tfd(priv, txq);
 354
 355         len = sizeof(struct iwl_cmd) * q->n_window;
 356         if (q->id == IWL_CMD_QUEUE_NUM)
 357                 len += IWL_MAX_SCAN_SIZE;
 358
 359         /* De-alloc array of command/tx buffers */
 360         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 361
 362         /* De-alloc circular buffer of TFDs */
 363         if (txq->q.n_bd)
 364                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 365                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 366
 367         /* De-alloc array of per-TFD driver data */
 368         if (txq->txb) {
 369                 kfree(txq->txb);
 370                 txq->txb = NULL;
 371         }
 372
 373         /* 0-fill queue descriptor structure */
 374         memset(txq, 0, sizeof(*txq));
 375 }
 376
 377 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 378
 379 /*************** STATION TABLE MANAGEMENT ****
 380  * mac80211 should be examined to determine if sta_info is duplicating
 381  * the functionality provided here
 382  */
 383
 384 /**************************************************************/
 385
 386 #if 0 /* temporary disable till we add real remove station */
 387 /**
 388  * iwl4965_remove_station - Remove driver's knowledge of station.
 389  *
 390  * NOTE:  This does not remove station from device's station table.
 391  */
 392 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 393 {
 394         int index = IWL_INVALID_STATION;
 395         int i;
 396         unsigned long flags;
 397
 398         spin_lock_irqsave(&priv->sta_lock, flags);
 399
 400         if (is_ap)
 401                 index = IWL_AP_ID;
 402         else if (is_broadcast_ether_addr(addr))
 403                 index = priv->hw_params.bcast_sta_id;
 404         else
 405                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 406                         if (priv->stations[i].used &&
 407                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 408                                                 addr)) {
 409                                 index = i;
 410                                 break;
 411                         }
 412
 413         if (unlikely(index == IWL_INVALID_STATION))
 414                 goto out;
 415
 416         if (priv->stations[index].used) {
 417                 priv->stations[index].used = 0;
 418                 priv->num_stations--;
 419         }
 420
 421         BUG_ON(priv->num_stations < 0);
 422
 423 out:
 424         spin_unlock_irqrestore(&priv->sta_lock, flags);
 425         return 0;
 426 }
 427 #endif
 428
 429 /**
 430  * iwl4965_add_station_flags - Add station to tables in driver and device
 431  */
 432 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
 433                                 int is_ap, u8 flags, void *ht_data)
 434 {
 435         int i;
 436         int index = IWL_INVALID_STATION;
 437         struct iwl_station_entry *station;
 438         unsigned long flags_spin;
 439         DECLARE_MAC_BUF(mac);
 440
 441         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 442         if (is_ap)
 443                 index = IWL_AP_ID;
 444         else if (is_broadcast_ether_addr(addr))
 445                 index = priv->hw_params.bcast_sta_id;
 446         else
 447                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 448                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 449                                                 addr)) {
 450                                 index = i;
 451                                 break;
 452                         }
 453
 454                         if (!priv->stations[i].used &&
 455                             index == IWL_INVALID_STATION)
 456                                 index = i;
 457                 }
 458
 459
 460         /* These two conditions have the same outcome, but keep them separate
 461           since they have different meanings */
 462         if (unlikely(index == IWL_INVALID_STATION)) {
 463                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 464                 return index;
 465         }
 466
 467         if (priv->stations[index].used &&
 468             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 469                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 470                 return index;
 471         }
 472
 473
 474         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 475         station = &priv->stations[index];
 476         station->used = 1;
 477         priv->num_stations++;
 478
 479         /* Set up the REPLY_ADD_STA command to send to device */
 480         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 481         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 482         station->sta.mode = 0;
 483         station->sta.sta.sta_id = index;
 484         station->sta.station_flags = 0;
 485
 486 #ifdef CONFIG_IWL4965_HT
 487         /* BCAST station and IBSS stations do not work in HT mode */
 488         if (index != priv->hw_params.bcast_sta_id &&
 489             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 490                 iwl4965_set_ht_add_station(priv, index,
 491                                  (struct ieee80211_ht_info *) ht_data);
 492 #endif /*CONFIG_IWL4965_HT*/
 493
 494         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 495
 496         /* Add station to device's station table */
 497         iwl_send_add_sta(priv, &station->sta, flags);
 498         return index;
 499
 500 }
 501
 502
 503
 504 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 505
 506 /**
 507  * iwl4965_enqueue_hcmd - enqueue a uCode command
 508  * @priv: device private data point
 509  * @cmd: a point to the ucode command structure
 510  *
 511  * The function returns < 0 values to indicate the operation is
 512  * failed. On success, it turns the index (> 0) of command in the
 513  * command queue.
 514  */
 515 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 516 {
 517         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 518         struct iwl4965_queue *q = &txq->q;
 519         struct iwl4965_tfd_frame *tfd;
 520         u32 *control_flags;
 521         struct iwl_cmd *out_cmd;
 522         u32 idx;
 523         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 524         dma_addr_t phys_addr;
 525         int ret;
 526         unsigned long flags;
 527
 528         /* If any of the command structures end up being larger than
 529          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 530          * we will need to increase the size of the TFD entries */
 531         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 532                !(cmd->meta.flags & CMD_SIZE_HUGE));
 533
 534         if (iwl_is_rfkill(priv)) {
 535                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 536                 return -EIO;
 537         }
 538
 539         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 540                 IWL_ERROR("No space for Tx\n");
 541                 return -ENOSPC;
 542         }
 543
 544         spin_lock_irqsave(&priv->hcmd_lock, flags);
 545
 546         tfd = &txq->bd[q->write_ptr];
 547         memset(tfd, 0, sizeof(*tfd));
 548
 549         control_flags = (u32 *) tfd;
 550
 551         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 552         out_cmd = &txq->cmd[idx];
 553
 554         out_cmd->hdr.cmd = cmd->id;
 555         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 556         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 557
 558         /* At this point, the out_cmd now has all of the incoming cmd
 559          * information */
 560
 561         out_cmd->hdr.flags = 0;
 562         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 563                         INDEX_TO_SEQ(q->write_ptr));
 564         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 565                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 566
 567         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 568                         offsetof(struct iwl_cmd, hdr);
 569         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 570
 571         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 572                      "%d bytes at %d[%d]:%d\n",
 573                      get_cmd_string(out_cmd->hdr.cmd),
 574                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 575                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 576
 577         txq->need_update = 1;
 578
 579         /* Set up entry in queue's byte count circular buffer */
 580         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
 581
 582         /* Increment and update queue's write index */
 583         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 584         ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
 585
 586         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 587         return ret ? ret : idx;
 588 }
 589
 590 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 591 {
 592         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 593
 594         if (hw_decrypt)
 595                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 596         else
 597                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 598
 599 }
 600
 601 /**
 602  * iwl4965_rxon_add_station - add station into station table.
 603  *
 604  * there is only one AP station with id= IWL_AP_ID
 605  * NOTE: mutex must be held before calling this fnction
 606  */
 607 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 608                                 const u8 *addr, int is_ap)
 609 {
 610         u8 sta_id;
 611
 612         /* Add station to device's station table */
 613 #ifdef CONFIG_IWL4965_HT
 614         struct ieee80211_conf *conf = &priv->hw->conf;
 615         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 616
 617         if ((is_ap) &&
 618             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 619             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 620                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 621                                                    0, cur_ht_config);
 622         else
 623 #endif /* CONFIG_IWL4965_HT */
 624                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 625                                                    0, NULL);
 626
 627         /* Set up default rate scaling table in device's station table */
 628         iwl4965_add_station(priv, addr, is_ap);
 629
 630         return sta_id;
 631 }
 632
 633 /**
 634  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 635  *
 636  * NOTE:  This is really only useful during development and can eventually
 637  * be #ifdef'd out once the driver is stable and folks aren't actively
 638  * making changes
 639  */
 640 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 641 {
 642         int error = 0;
 643         int counter = 1;
 644
 645         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 646                 error |= le32_to_cpu(rxon->flags &
 647                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 648                                  RXON_FLG_RADAR_DETECT_MSK));
 649                 if (error)
 650                         IWL_WARNING("check 24G fields %d | %d\n",
 651                                     counter++, error);
 652         } else {
 653                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 654                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 655                 if (error)
 656                         IWL_WARNING("check 52 fields %d | %d\n",
 657                                     counter++, error);
 658                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 659                 if (error)
 660                         IWL_WARNING("check 52 CCK %d | %d\n",
 661                                     counter++, error);
 662         }
 663         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 664         if (error)
 665                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 666
 667         /* make sure basic rates 6Mbps and 1Mbps are supported */
 668         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 669                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 670         if (error)
 671                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 672
 673         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 674         if (error)
 675                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 676
 677         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 678                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 679         if (error)
 680                 IWL_WARNING("check CCK and short slot %d | %d\n",
 681                             counter++, error);
 682
 683         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 684                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 685         if (error)
 686                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 687                             counter++, error);
 688
 689         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 690                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 691         if (error)
 692                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 693                             counter++, error);
 694
 695         if (error)
 696                 IWL_WARNING("Tuning to channel %d\n",
 697                             le16_to_cpu(rxon->channel));
 698
 699         if (error) {
 700                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 701                 return -1;
 702         }
 703         return 0;
 704 }
 705
 706 /**
 707  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 708  * @priv: staging_rxon is compared to active_rxon
 709  *
 710  * If the RXON structure is changing enough to require a new tune,
 711  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 712  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 713  */
 714 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 715 {
 716
 717         /* These items are only settable from the full RXON command */
 718         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 719             compare_ether_addr(priv->staging_rxon.bssid_addr,
 720                                priv->active_rxon.bssid_addr) ||
 721             compare_ether_addr(priv->staging_rxon.node_addr,
 722                                priv->active_rxon.node_addr) ||
 723             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 724                                priv->active_rxon.wlap_bssid_addr) ||
 725             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 726             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 727             (priv->staging_rxon.air_propagation !=
 728              priv->active_rxon.air_propagation) ||
 729             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 730              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 731             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 732              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 733             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 734             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 735                 return 1;
 736
 737         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 738          * be updated with the RXON_ASSOC command -- however only some
 739          * flag transitions are allowed using RXON_ASSOC */
 740
 741         /* Check if we are not switching bands */
 742         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 743             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 744                 return 1;
 745
 746         /* Check if we are switching association toggle */
 747         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 748                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 749                 return 1;
 750
 751         return 0;
 752 }
 753
 754 /**
 755  * iwl4965_commit_rxon - commit staging_rxon to hardware
 756  *
 757  * The RXON command in staging_rxon is committed to the hardware and
 758  * the active_rxon structure is updated with the new data.  This
 759  * function correctly transitions out of the RXON_ASSOC_MSK state if
 760  * a HW tune is required based on the RXON structure changes.
 761  */
 762 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 763 {
 764         /* cast away the const for active_rxon in this function */
 765         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 766         DECLARE_MAC_BUF(mac);
 767         int rc = 0;
 768
 769         if (!iwl_is_alive(priv))
 770                 return -1;
 771
 772         /* always get timestamp with Rx frame */
 773         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 774
 775         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 776         if (rc) {
 777                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 778                 return -EINVAL;
 779         }
 780
 781         /* If we don't need to send a full RXON, we can use
 782          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 783          * and other flags for the current radio configuration. */
 784         if (!iwl4965_full_rxon_required(priv)) {
 785                 rc = iwl_send_rxon_assoc(priv);
 786                 if (rc) {
 787                         IWL_ERROR("Error setting RXON_ASSOC "
 788                                   "configuration (%d).\n", rc);
 789                         return rc;
 790                 }
 791
 792                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 793
 794                 return 0;
 795         }
 796
 797         /* station table will be cleared */
 798         priv->assoc_station_added = 0;
 799
 800         /* If we are currently associated and the new config requires
 801          * an RXON_ASSOC and the new config wants the associated mask enabled,
 802          * we must clear the associated from the active configuration
 803          * before we apply the new config */
 804         if (iwl_is_associated(priv) &&
 805             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 806                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 807                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 808
 809                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 810                                       sizeof(struct iwl4965_rxon_cmd),
 811                                       &priv->active_rxon);
 812
 813                 /* If the mask clearing failed then we set
 814                  * active_rxon back to what it was previously */
 815                 if (rc) {
 816                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 817                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 818                                   "configuration (%d).\n", rc);
 819                         return rc;
 820                 }
 821         }
 822
 823         IWL_DEBUG_INFO("Sending RXON\n"
 824                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 825                        "* channel = %d\n"
 826                        "* bssid = %s\n",
 827                        ((priv->staging_rxon.filter_flags &
 828                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 829                        le16_to_cpu(priv->staging_rxon.channel),
 830                        print_mac(mac, priv->staging_rxon.bssid_addr));
 831
 832         iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 833         /* Apply the new configuration */
 834         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 835                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
 836         if (rc) {
 837                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 838                 return rc;
 839         }
 840
 841         iwlcore_clear_stations_table(priv);
 842
 843         if (!priv->error_recovering)
 844                 priv->start_calib = 0;
 845
 846         iwl_init_sensitivity(priv);
 847
 848         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 849
 850         /* If we issue a new RXON command which required a tune then we must
 851          * send a new TXPOWER command or we won't be able to Tx any frames */
 852         rc = iwl4965_hw_reg_send_txpower(priv);
 853         if (rc) {
 854                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 855                 return rc;
 856         }
 857
 858         /* Add the broadcast address so we can send broadcast frames */
 859         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
 860             IWL_INVALID_STATION) {
 861                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 862                 return -EIO;
 863         }
 864
 865         /* If we have set the ASSOC_MSK and we are in BSS mode then
 866          * add the IWL_AP_ID to the station rate table */
 867         if (iwl_is_associated(priv) &&
 868             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 869                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 870                     == IWL_INVALID_STATION) {
 871                         IWL_ERROR("Error adding AP address for transmit.\n");
 872                         return -EIO;
 873                 }
 874                 priv->assoc_station_added = 1;
 875                 if (priv->default_wep_key &&
 876                     iwl_send_static_wepkey_cmd(priv, 0))
 877                         IWL_ERROR("Could not send WEP static key.\n");
 878         }
 879
 880         return 0;
 881 }
 882
 883 void iwl4965_update_chain_flags(struct iwl_priv *priv)
 884 {
 885
 886         iwl_set_rxon_chain(priv);
 887         iwl4965_commit_rxon(priv);
 888 }
 889
 890 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 891 {
 892         struct iwl4965_bt_cmd bt_cmd = {
 893                 .flags = 3,
 894                 .lead_time = 0xAA,
 895                 .max_kill = 1,
 896                 .kill_ack_mask = 0,
 897                 .kill_cts_mask = 0,
 898         };
 899
 900         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 901                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 902 }
 903
 904 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
 905 {
 906         int ret = 0;
 907         struct iwl_rx_packet *res;
 908         struct iwl_host_cmd cmd = {
 909                 .id = REPLY_SCAN_ABORT_CMD,
 910                 .meta.flags = CMD_WANT_SKB,
 911         };
 912
 913         /* If there isn't a scan actively going on in the hardware
 914          * then we are in between scan bands and not actually
 915          * actively scanning, so don't send the abort command */
 916         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 917                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 918                 return 0;
 919         }
 920
 921         ret = iwl_send_cmd_sync(priv, &cmd);
 922         if (ret) {
 923                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 924                 return ret;
 925         }
 926
 927         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 928         if (res->u.status != CAN_ABORT_STATUS) {
 929                 /* The scan abort will return 1 for success or
 930                  * 2 for "failure".  A failure condition can be
 931                  * due to simply not being in an active scan which
 932                  * can occur if we send the scan abort before we
 933                  * the microcode has notified us that a scan is
 934                  * completed. */
 935                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 936                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 937                 clear_bit(STATUS_SCAN_HW, &priv->status);
 938         }
 939
 940         dev_kfree_skb_any(cmd.meta.u.skb);
 941
 942         return ret;
 943 }
 944
 945 /*
 946  * CARD_STATE_CMD
 947  *
 948  * Use: Sets the device's internal card state to enable, disable, or halt
 949  *
 950  * When in the 'enable' state the card operates as normal.
 951  * When in the 'disable' state, the card enters into a low power mode.
 952  * When in the 'halt' state, the card is shut down and must be fully
 953  * restarted to come back on.
 954  */
 955 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
 956 {
 957         struct iwl_host_cmd cmd = {
 958                 .id = REPLY_CARD_STATE_CMD,
 959                 .len = sizeof(u32),
 960                 .data = &flags,
 961                 .meta.flags = meta_flag,
 962         };
 963
 964         return iwl_send_cmd(priv, &cmd);
 965 }
 966
 967 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
 968 {
 969         struct list_head *element;
 970
 971         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
 972                        priv->frames_count);
 973
 974         while (!list_empty(&priv->free_frames)) {
 975                 element = priv->free_frames.next;
 976                 list_del(element);
 977                 kfree(list_entry(element, struct iwl4965_frame, list));
 978                 priv->frames_count--;
 979         }
 980
 981         if (priv->frames_count) {
 982                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
 983                             priv->frames_count);
 984                 priv->frames_count = 0;
 985         }
 986 }
 987
 988 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
 989 {
 990         struct iwl4965_frame *frame;
 991         struct list_head *element;
 992         if (list_empty(&priv->free_frames)) {
 993                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 994                 if (!frame) {
 995                         IWL_ERROR("Could not allocate frame!\n");
 996                         return NULL;
 997                 }
 998
 999                 priv->frames_count++;
1000                 return frame;
1001         }
1002
1003         element = priv->free_frames.next;
1004         list_del(element);
1005         return list_entry(element, struct iwl4965_frame, list);
1006 }
1007
1008 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1009 {
1010         memset(frame, 0, sizeof(*frame));
1011         list_add(&frame->list, &priv->free_frames);
1012 }
1013
1014 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1015                                 struct ieee80211_hdr *hdr,
1016                                 const u8 *dest, int left)
1017 {
1018
1019         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1020             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1021              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1022                 return 0;
1023
1024         if (priv->ibss_beacon->len > left)
1025                 return 0;
1026
1027         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1028
1029         return priv->ibss_beacon->len;
1030 }
1031
1032 static u8 iwl4965_rate_get_lowest_plcp(struct iwl_priv *priv)
1033 {
1034         int i;
1035         int rate_mask;
1036
1037         /* Set rate mask*/
1038         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1039                 rate_mask = priv->active_rate_basic & 0xF;
1040         else
1041                 rate_mask = priv->active_rate_basic & 0xFF0;
1042
1043         /* Find lowest valid rate */
1044         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1045                                         i = iwl4965_rates[i].next_ieee) {
1046                 if (rate_mask & (1 << i))
1047                         return iwl4965_rates[i].plcp;
1048         }
1049
1050         /* No valid rate was found. Assign the lowest one */
1051         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1052                 return IWL_RATE_1M_PLCP;
1053         else
1054                 return IWL_RATE_6M_PLCP;
1055 }
1056
1057 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1058 {
1059         struct iwl4965_frame *frame;
1060         unsigned int frame_size;
1061         int rc;
1062         u8 rate;
1063
1064         frame = iwl4965_get_free_frame(priv);
1065
1066         if (!frame) {
1067                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1068                           "command.\n");
1069                 return -ENOMEM;
1070         }
1071
1072         rate = iwl4965_rate_get_lowest_plcp(priv);
1073
1074         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1075
1076         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1077                               &frame->u.cmd[0]);
1078
1079         iwl4965_free_frame(priv, frame);
1080
1081         return rc;
1082 }
1083
1084 /******************************************************************************
1085  *
1086  * Misc. internal state and helper functions
1087  *
1088  ******************************************************************************/
1089
1090 /**
1091  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1092  *
1093  * return : set the bit for each supported rate insert in ie
1094  */
1095 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1096                                     u16 basic_rate, int *left)
1097 {
1098         u16 ret_rates = 0, bit;
1099         int i;
1100         u8 *cnt = ie;
1101         u8 *rates = ie + 1;
1102
1103         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1104                 if (bit & supported_rate) {
1105                         ret_rates |= bit;
1106                         rates[*cnt] = iwl4965_rates[i].ieee |
1107                                 ((bit & basic_rate) ? 0x80 : 0x00);
1108                         (*cnt)++;
1109                         (*left)--;
1110                         if ((*left <= 0) ||
1111                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1112                                 break;
1113                 }
1114         }
1115
1116         return ret_rates;
1117 }
1118
1119 #ifdef CONFIG_IWL4965_HT
1120 static void iwl4965_ht_conf(struct iwl_priv *priv,
1121                             struct ieee80211_bss_conf *bss_conf)
1122 {
1123         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
1124         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
1125         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
1126
1127         IWL_DEBUG_MAC80211("enter: \n");
1128
1129         iwl_conf->is_ht = bss_conf->assoc_ht;
1130
1131         if (!iwl_conf->is_ht)
1132                 return;
1133
1134         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1135
1136         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
1137                 iwl_conf->sgf |= 0x1;
1138         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
1139                 iwl_conf->sgf |= 0x2;
1140
1141         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
1142         iwl_conf->max_amsdu_size =
1143                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
1144
1145         iwl_conf->supported_chan_width =
1146                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
1147         iwl_conf->extension_chan_offset =
1148                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
1149         /* If no above or below channel supplied disable FAT channel */
1150         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
1151             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
1152                 iwl_conf->supported_chan_width = 0;
1153
1154         iwl_conf->tx_mimo_ps_mode =
1155                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1156         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
1157
1158         iwl_conf->control_channel = ht_bss_conf->primary_channel;
1159         iwl_conf->tx_chan_width =
1160                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
1161         iwl_conf->ht_protection =
1162                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
1163         iwl_conf->non_GF_STA_present =
1164                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
1165
1166         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
1167         IWL_DEBUG_MAC80211("leave\n");
1168 }
1169
1170 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1171                         u8 *pos, int *left)
1172 {
1173         struct ieee80211_ht_cap *ht_cap;
1174
1175         if (!sband || !sband->ht_info.ht_supported)
1176                 return;
1177
1178         if (*left < sizeof(struct ieee80211_ht_cap))
1179                 return;
1180
1181         *pos++ = sizeof(struct ieee80211_ht_cap);
1182         ht_cap = (struct ieee80211_ht_cap *) pos;
1183
1184         ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1185         memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1186         ht_cap->ampdu_params_info =
1187                 (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
1188                 ((sband->ht_info.ampdu_density << 2) &
1189                         IEEE80211_HT_CAP_AMPDU_DENSITY);
1190         *left -= sizeof(struct ieee80211_ht_cap);
1191 }
1192 #else
1193 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
1194                                    struct ieee80211_bss_conf *bss_conf)
1195 {
1196 }
1197 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1198                         u8 *pos, int *left)
1199 {
1200 }
1201 #endif
1202
1203
1204 /**
1205  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1206  */
1207 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1208                                   enum ieee80211_band band,
1209                                   struct ieee80211_mgmt *frame,
1210                                   int left, int is_direct)
1211 {
1212         int len = 0;
1213         u8 *pos = NULL;
1214         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1215         const struct ieee80211_supported_band *sband =
1216                                                 iwl_get_hw_mode(priv, band);
1217
1218         /* Make sure there is enough space for the probe request,
1219          * two mandatory IEs and the data */
1220         left -= 24;
1221         if (left < 0)
1222                 return 0;
1223         len += 24;
1224
1225         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1226         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1227         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1228         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1229         frame->seq_ctrl = 0;
1230
1231         /* fill in our indirect SSID IE */
1232         /* ...next IE... */
1233
1234         left -= 2;
1235         if (left < 0)
1236                 return 0;
1237         len += 2;
1238         pos = &(frame->u.probe_req.variable[0]);
1239         *pos++ = WLAN_EID_SSID;
1240         *pos++ = 0;
1241
1242         /* fill in our direct SSID IE... */
1243         if (is_direct) {
1244                 /* ...next IE... */
1245                 left -= 2 + priv->essid_len;
1246                 if (left < 0)
1247                         return 0;
1248                 /* ... fill it in... */
1249                 *pos++ = WLAN_EID_SSID;
1250                 *pos++ = priv->essid_len;
1251                 memcpy(pos, priv->essid, priv->essid_len);
1252                 pos += priv->essid_len;
1253                 len += 2 + priv->essid_len;
1254         }
1255
1256         /* fill in supported rate */
1257         /* ...next IE... */
1258         left -= 2;
1259         if (left < 0)
1260                 return 0;
1261
1262         /* ... fill it in... */
1263         *pos++ = WLAN_EID_SUPP_RATES;
1264         *pos = 0;
1265
1266         /* exclude 60M rate */
1267         active_rates = priv->rates_mask;
1268         active_rates &= ~IWL_RATE_60M_MASK;
1269
1270         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1271
1272         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1273         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1274                         active_rate_basic, &left);
1275         active_rates &= ~ret_rates;
1276
1277         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1278                                  active_rate_basic, &left);
1279         active_rates &= ~ret_rates;
1280
1281         len += 2 + *pos;
1282         pos += (*pos) + 1;
1283         if (active_rates == 0)
1284                 goto fill_end;
1285
1286         /* fill in supported extended rate */
1287         /* ...next IE... */
1288         left -= 2;
1289         if (left < 0)
1290                 return 0;
1291         /* ... fill it in... */
1292         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1293         *pos = 0;
1294         iwl4965_supported_rate_to_ie(pos, active_rates,
1295                                  active_rate_basic, &left);
1296         if (*pos > 0)
1297                 len += 2 + *pos;
1298
1299  fill_end:
1300         /* fill in HT IE */
1301         left -= 2;
1302         if (left < 0)
1303                 return 0;
1304
1305         *pos++ = WLAN_EID_HT_CAPABILITY;
1306         *pos = 0;
1307
1308         iwl_ht_cap_to_ie(sband, pos, &left);
1309
1310         if (*pos > 0)
1311                 len += 2 + *pos;
1312         return (u16)len;
1313 }
1314
1315 /*
1316  * QoS  support
1317 */
1318 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1319                                        struct iwl4965_qosparam_cmd *qos)
1320 {
1321
1322         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1323                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1324 }
1325
1326 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1327 {
1328         unsigned long flags;
1329
1330         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1331                 return;
1332
1333         if (!priv->qos_data.qos_enable)
1334                 return;
1335
1336         spin_lock_irqsave(&priv->lock, flags);
1337         priv->qos_data.def_qos_parm.qos_flags = 0;
1338
1339         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1340             !priv->qos_data.qos_cap.q_AP.txop_request)
1341                 priv->qos_data.def_qos_parm.qos_flags |=
1342                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1343         if (priv->qos_data.qos_active)
1344                 priv->qos_data.def_qos_parm.qos_flags |=
1345                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1346
1347 #ifdef CONFIG_IWL4965_HT
1348         if (priv->current_ht_config.is_ht)
1349                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1350 #endif /* CONFIG_IWL4965_HT */
1351
1352         spin_unlock_irqrestore(&priv->lock, flags);
1353
1354         if (force || iwl_is_associated(priv)) {
1355                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1356                                 priv->qos_data.qos_active,
1357                                 priv->qos_data.def_qos_parm.qos_flags);
1358
1359                 iwl4965_send_qos_params_command(priv,
1360                                 &(priv->qos_data.def_qos_parm));
1361         }
1362 }
1363
1364 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1365 {
1366         /* Filter incoming packets to determine if they are targeted toward
1367          * this network, discarding packets coming from ourselves */
1368         switch (priv->iw_mode) {
1369         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1370                 /* packets from our adapter are dropped (echo) */
1371                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1372                         return 0;
1373                 /* {broad,multi}cast packets to our IBSS go through */
1374                 if (is_multicast_ether_addr(header->addr1))
1375                         return !compare_ether_addr(header->addr3, priv->bssid);
1376                 /* packets to our adapter go through */
1377                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1378         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1379                 /* packets from our adapter are dropped (echo) */
1380                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1381                         return 0;
1382                 /* {broad,multi}cast packets to our BSS go through */
1383                 if (is_multicast_ether_addr(header->addr1))
1384                         return !compare_ether_addr(header->addr2, priv->bssid);
1385                 /* packets to our adapter go through */
1386                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1387         default:
1388                 break;
1389         }
1390
1391         return 1;
1392 }
1393
1394 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1395
1396 static const char *iwl4965_get_tx_fail_reason(u32 status)
1397 {
1398         switch (status & TX_STATUS_MSK) {
1399         case TX_STATUS_SUCCESS:
1400                 return "SUCCESS";
1401                 TX_STATUS_ENTRY(SHORT_LIMIT);
1402                 TX_STATUS_ENTRY(LONG_LIMIT);
1403                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1404                 TX_STATUS_ENTRY(MGMNT_ABORT);
1405                 TX_STATUS_ENTRY(NEXT_FRAG);
1406                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1407                 TX_STATUS_ENTRY(DEST_PS);
1408                 TX_STATUS_ENTRY(ABORTED);
1409                 TX_STATUS_ENTRY(BT_RETRY);
1410                 TX_STATUS_ENTRY(STA_INVALID);
1411                 TX_STATUS_ENTRY(FRAG_DROPPED);
1412                 TX_STATUS_ENTRY(TID_DISABLE);
1413                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1414                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1415                 TX_STATUS_ENTRY(TX_LOCKED);
1416                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1417         }
1418
1419         return "UNKNOWN";
1420 }
1421
1422 /**
1423  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1424  *
1425  * NOTE: priv->mutex is not required before calling this function
1426  */
1427 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1428 {
1429         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1430                 clear_bit(STATUS_SCANNING, &priv->status);
1431                 return 0;
1432         }
1433
1434         if (test_bit(STATUS_SCANNING, &priv->status)) {
1435                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1436                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1437                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1438                         queue_work(priv->workqueue, &priv->abort_scan);
1439
1440                 } else
1441                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1442
1443                 return test_bit(STATUS_SCANNING, &priv->status);
1444         }
1445
1446         return 0;
1447 }
1448
1449 /**
1450  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1451  * @ms: amount of time to wait (in milliseconds) for scan to abort
1452  *
1453  * NOTE: priv->mutex must be held before calling this function
1454  */
1455 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1456 {
1457         unsigned long now = jiffies;
1458         int ret;
1459
1460         ret = iwl4965_scan_cancel(priv);
1461         if (ret && ms) {
1462                 mutex_unlock(&priv->mutex);
1463                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1464                                 test_bit(STATUS_SCANNING, &priv->status))
1465                         msleep(1);
1466                 mutex_lock(&priv->mutex);
1467
1468                 return test_bit(STATUS_SCANNING, &priv->status);
1469         }
1470
1471         return ret;
1472 }
1473
1474 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1475 {
1476         /* Reset ieee stats */
1477
1478         /* We don't reset the net_device_stats (ieee->stats) on
1479          * re-association */
1480
1481         priv->last_seq_num = -1;
1482         priv->last_frag_num = -1;
1483         priv->last_packet_time = 0;
1484
1485         iwl4965_scan_cancel(priv);
1486 }
1487
1488 #define MAX_UCODE_BEACON_INTERVAL       4096
1489 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1490
1491 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1492 {
1493         u16 new_val = 0;
1494         u16 beacon_factor = 0;
1495
1496         beacon_factor =
1497             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1498                 / MAX_UCODE_BEACON_INTERVAL;
1499         new_val = beacon_val / beacon_factor;
1500
1501         return cpu_to_le16(new_val);
1502 }
1503
1504 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1505 {
1506         u64 interval_tm_unit;
1507         u64 tsf, result;
1508         unsigned long flags;
1509         struct ieee80211_conf *conf = NULL;
1510         u16 beacon_int = 0;
1511
1512         conf = ieee80211_get_hw_conf(priv->hw);
1513
1514         spin_lock_irqsave(&priv->lock, flags);
1515         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1516         priv->rxon_timing.timestamp.dw[0] =
1517                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1518
1519         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1520
1521         tsf = priv->timestamp;
1522
1523         beacon_int = priv->beacon_int;
1524         spin_unlock_irqrestore(&priv->lock, flags);
1525
1526         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1527                 if (beacon_int == 0) {
1528                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1529                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1530                 } else {
1531                         priv->rxon_timing.beacon_interval =
1532                                 cpu_to_le16(beacon_int);
1533                         priv->rxon_timing.beacon_interval =
1534                             iwl4965_adjust_beacon_interval(
1535                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1536                 }
1537
1538                 priv->rxon_timing.atim_window = 0;
1539         } else {
1540                 priv->rxon_timing.beacon_interval =
1541                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1542                 /* TODO: we need to get atim_window from upper stack
1543                  * for now we set to 0 */
1544                 priv->rxon_timing.atim_window = 0;
1545         }
1546
1547         interval_tm_unit =
1548                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1549         result = do_div(tsf, interval_tm_unit);
1550         priv->rxon_timing.beacon_init_val =
1551             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1552
1553         IWL_DEBUG_ASSOC
1554             ("beacon interval %d beacon timer %d beacon tim %d\n",
1555                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1556                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1557                 le16_to_cpu(priv->rxon_timing.atim_window));
1558 }
1559
1560 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1561 {
1562         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1563                 IWL_ERROR("APs don't scan.\n");
1564                 return 0;
1565         }
1566
1567         if (!iwl_is_ready_rf(priv)) {
1568                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1569                 return -EIO;
1570         }
1571
1572         if (test_bit(STATUS_SCANNING, &priv->status)) {
1573                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1574                 return -EAGAIN;
1575         }
1576
1577         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1578                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1579                                "Queuing.\n");
1580                 return -EAGAIN;
1581         }
1582
1583         IWL_DEBUG_INFO("Starting scan...\n");
1584         priv->scan_bands = 2;
1585         set_bit(STATUS_SCANNING, &priv->status);
1586         priv->scan_start = jiffies;
1587         priv->scan_pass_start = priv->scan_start;
1588
1589         queue_work(priv->workqueue, &priv->request_scan);
1590
1591         return 0;
1592 }
1593
1594
1595 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1596                                           enum ieee80211_band band)
1597 {
1598         if (band == IEEE80211_BAND_5GHZ) {
1599                 priv->staging_rxon.flags &=
1600                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1601                       | RXON_FLG_CCK_MSK);
1602                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1603         } else {
1604                 /* Copied from iwl4965_post_associate() */
1605                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1606                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1607                 else
1608                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1609
1610                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1611                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1612
1613                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1614                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1615                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1616         }
1617 }
1618
1619 /*
1620  * initialize rxon structure with default values from eeprom
1621  */
1622 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1623 {
1624         const struct iwl_channel_info *ch_info;
1625
1626         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1627
1628         switch (priv->iw_mode) {
1629         case IEEE80211_IF_TYPE_AP:
1630                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1631                 break;
1632
1633         case IEEE80211_IF_TYPE_STA:
1634                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1635                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1636                 break;
1637
1638         case IEEE80211_IF_TYPE_IBSS:
1639                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1640                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1641                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1642                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1643                 break;
1644
1645         case IEEE80211_IF_TYPE_MNTR:
1646                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1647                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1648                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1649                 break;
1650         default:
1651                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1652                 break;
1653         }
1654
1655 #if 0
1656         /* TODO:  Figure out when short_preamble would be set and cache from
1657          * that */
1658         if (!hw_to_local(priv->hw)->short_preamble)
1659                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1660         else
1661                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1662 #endif
1663
1664         ch_info = iwl_get_channel_info(priv, priv->band,
1665                                        le16_to_cpu(priv->staging_rxon.channel));
1666
1667         if (!ch_info)
1668                 ch_info = &priv->channel_info[0];
1669
1670         /*
1671          * in some case A channels are all non IBSS
1672          * in this case force B/G channel
1673          */
1674         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1675             !(is_channel_ibss(ch_info)))
1676                 ch_info = &priv->channel_info[0];
1677
1678         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1679         priv->band = ch_info->band;
1680
1681         iwl4965_set_flags_for_phymode(priv, priv->band);
1682
1683         priv->staging_rxon.ofdm_basic_rates =
1684             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1685         priv->staging_rxon.cck_basic_rates =
1686             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1687
1688         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1689                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1690         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1691         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1692         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1693         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1694         iwl_set_rxon_chain(priv);
1695 }
1696
1697 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1698 {
1699         if (mode == IEEE80211_IF_TYPE_IBSS) {
1700                 const struct iwl_channel_info *ch_info;
1701
1702                 ch_info = iwl_get_channel_info(priv,
1703                         priv->band,
1704                         le16_to_cpu(priv->staging_rxon.channel));
1705
1706                 if (!ch_info || !is_channel_ibss(ch_info)) {
1707                         IWL_ERROR("channel %d not IBSS channel\n",
1708                                   le16_to_cpu(priv->staging_rxon.channel));
1709                         return -EINVAL;
1710                 }
1711         }
1712
1713         priv->iw_mode = mode;
1714
1715         iwl4965_connection_init_rx_config(priv);
1716         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1717
1718         iwlcore_clear_stations_table(priv);
1719
1720         /* dont commit rxon if rf-kill is on*/
1721         if (!iwl_is_ready_rf(priv))
1722                 return -EAGAIN;
1723
1724         cancel_delayed_work(&priv->scan_check);
1725         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1726                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1727                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1728                 return -EAGAIN;
1729         }
1730
1731         iwl4965_commit_rxon(priv);
1732
1733         return 0;
1734 }
1735
1736 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1737                                       struct ieee80211_tx_control *ctl,
1738                                       struct iwl_cmd *cmd,
1739                                       struct sk_buff *skb_frag,
1740                                       int sta_id)
1741 {
1742         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1743         struct iwl_wep_key *wepkey;
1744         int keyidx = 0;
1745
1746         BUG_ON(ctl->hw_key->hw_key_idx > 3);
1747
1748         switch (keyinfo->alg) {
1749         case ALG_CCMP:
1750                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1751                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1752                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1753                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1754                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1755                 break;
1756
1757         case ALG_TKIP:
1758                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1759                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1760                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1761                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1762                 break;
1763
1764         case ALG_WEP:
1765                 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1766                 cmd->cmd.tx.sec_ctl = 0;
1767                 if (priv->default_wep_key) {
1768                         /* the WEP key was sent as static */
1769                         keyidx = ctl->hw_key->hw_key_idx;
1770                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1771                                                         wepkey->key_size);
1772                         if (wepkey->key_size == WEP_KEY_LEN_128)
1773                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1774                 } else {
1775                         /* the WEP key was sent as dynamic */
1776                         keyidx = keyinfo->keyidx;
1777                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1778                                                         keyinfo->keylen);
1779                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1780                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1781                 }
1782
1783                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1784                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1785
1786                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1787                              "with key %d\n", keyidx);
1788                 break;
1789
1790         default:
1791                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1792                 break;
1793         }
1794 }
1795
1796 /*
1797  * handle build REPLY_TX command notification.
1798  */
1799 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1800                                   struct iwl_cmd *cmd,
1801                                   struct ieee80211_tx_control *ctrl,
1802                                   struct ieee80211_hdr *hdr,
1803                                   int is_unicast, u8 std_id)
1804 {
1805         __le16 *qc;
1806         u16 fc = le16_to_cpu(hdr->frame_control);
1807         __le32 tx_flags = cmd->cmd.tx.tx_flags;
1808
1809         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1810         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1811                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1812                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1813                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1814                 if (ieee80211_is_probe_response(fc) &&
1815                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1816                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1817         } else {
1818                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1819                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1820         }
1821
1822         if (ieee80211_is_back_request(fc))
1823                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1824
1825
1826         cmd->cmd.tx.sta_id = std_id;
1827         if (ieee80211_get_morefrag(hdr))
1828                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1829
1830         qc = ieee80211_get_qos_ctrl(hdr);
1831         if (qc) {
1832                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
1833                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1834         } else
1835                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1836
1837         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
1838                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1839                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1840         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
1841                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1842                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1843         }
1844
1845         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1846                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1847
1848         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1849         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1850                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
1851                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
1852                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
1853                 else
1854                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
1855         } else {
1856                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
1857         }
1858
1859         cmd->cmd.tx.driver_txop = 0;
1860         cmd->cmd.tx.tx_flags = tx_flags;
1861         cmd->cmd.tx.next_frame_len = 0;
1862 }
1863 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
1864 {
1865         /* 0 - mgmt, 1 - cnt, 2 - data */
1866         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
1867         priv->tx_stats[idx].cnt++;
1868         priv->tx_stats[idx].bytes += len;
1869 }
1870 /**
1871  * iwl4965_get_sta_id - Find station's index within station table
1872  *
1873  * If new IBSS station, create new entry in station table
1874  */
1875 static int iwl4965_get_sta_id(struct iwl_priv *priv,
1876                                 struct ieee80211_hdr *hdr)
1877 {
1878         int sta_id;
1879         u16 fc = le16_to_cpu(hdr->frame_control);
1880         DECLARE_MAC_BUF(mac);
1881
1882         /* If this frame is broadcast or management, use broadcast station id */
1883         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1884             is_multicast_ether_addr(hdr->addr1))
1885                 return priv->hw_params.bcast_sta_id;
1886
1887         switch (priv->iw_mode) {
1888
1889         /* If we are a client station in a BSS network, use the special
1890          * AP station entry (that's the only station we communicate with) */
1891         case IEEE80211_IF_TYPE_STA:
1892                 return IWL_AP_ID;
1893
1894         /* If we are an AP, then find the station, or use BCAST */
1895         case IEEE80211_IF_TYPE_AP:
1896                 sta_id = iwl_find_station(priv, hdr->addr1);
1897                 if (sta_id != IWL_INVALID_STATION)
1898                         return sta_id;
1899                 return priv->hw_params.bcast_sta_id;
1900
1901         /* If this frame is going out to an IBSS network, find the station,
1902          * or create a new station table entry */
1903         case IEEE80211_IF_TYPE_IBSS:
1904                 sta_id = iwl_find_station(priv, hdr->addr1);
1905                 if (sta_id != IWL_INVALID_STATION)
1906                         return sta_id;
1907
1908                 /* Create new station table entry */
1909                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
1910                                                    0, CMD_ASYNC, NULL);
1911
1912                 if (sta_id != IWL_INVALID_STATION)
1913                         return sta_id;
1914
1915                 IWL_DEBUG_DROP("Station %s not in station map. "
1916                                "Defaulting to broadcast...\n",
1917                                print_mac(mac, hdr->addr1));
1918                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1919                 return priv->hw_params.bcast_sta_id;
1920
1921         default:
1922                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
1923                 return priv->hw_params.bcast_sta_id;
1924         }
1925 }
1926
1927 /*
1928  * start REPLY_TX command process
1929  */
1930 static int iwl4965_tx_skb(struct iwl_priv *priv,
1931                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
1932 {
1933         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1934         struct iwl4965_tfd_frame *tfd;
1935         u32 *control_flags;
1936         int txq_id = ctl->queue;
1937         struct iwl4965_tx_queue *txq = NULL;
1938         struct iwl4965_queue *q = NULL;
1939         dma_addr_t phys_addr;
1940         dma_addr_t txcmd_phys;
1941         dma_addr_t scratch_phys;
1942         struct iwl_cmd *out_cmd = NULL;
1943         u16 len, idx, len_org;
1944         u8 id, hdr_len, unicast;
1945         u8 sta_id;
1946         u16 seq_number = 0;
1947         u16 fc;
1948         __le16 *qc;
1949         u8 wait_write_ptr = 0;
1950         unsigned long flags;
1951         int rc;
1952
1953         spin_lock_irqsave(&priv->lock, flags);
1954         if (iwl_is_rfkill(priv)) {
1955                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
1956                 goto drop_unlock;
1957         }
1958
1959         if (!priv->vif) {
1960                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
1961                 goto drop_unlock;
1962         }
1963
1964         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
1965                 IWL_ERROR("ERROR: No TX rate available.\n");
1966                 goto drop_unlock;
1967         }
1968
1969         unicast = !is_multicast_ether_addr(hdr->addr1);
1970         id = 0;
1971
1972         fc = le16_to_cpu(hdr->frame_control);
1973
1974 #ifdef CONFIG_IWLWIFI_DEBUG
1975         if (ieee80211_is_auth(fc))
1976                 IWL_DEBUG_TX("Sending AUTH frame\n");
1977         else if (ieee80211_is_assoc_request(fc))
1978                 IWL_DEBUG_TX("Sending ASSOC frame\n");
1979         else if (ieee80211_is_reassoc_request(fc))
1980                 IWL_DEBUG_TX("Sending REASSOC frame\n");
1981 #endif
1982
1983         /* drop all data frame if we are not associated */
1984         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
1985            (!iwl_is_associated(priv) ||
1986             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
1987             !priv->assoc_station_added)) {
1988                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
1989                 goto drop_unlock;
1990         }
1991
1992         spin_unlock_irqrestore(&priv->lock, flags);
1993
1994         hdr_len = ieee80211_get_hdrlen(fc);
1995
1996         /* Find (or create) index into station table for destination station */
1997         sta_id = iwl4965_get_sta_id(priv, hdr);
1998         if (sta_id == IWL_INVALID_STATION) {
1999                 DECLARE_MAC_BUF(mac);
2000
2001                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2002                                print_mac(mac, hdr->addr1));
2003                 goto drop;
2004         }
2005
2006         IWL_DEBUG_TX("station Id %d\n", sta_id);
2007
2008         qc = ieee80211_get_qos_ctrl(hdr);
2009         if (qc) {
2010                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2011                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2012                                 IEEE80211_SCTL_SEQ;
2013                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2014                         (hdr->seq_ctrl &
2015                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2016                 seq_number += 0x10;
2017 #ifdef CONFIG_IWL4965_HT
2018                 /* aggregation is on for this <sta,tid> */
2019                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2020                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2021                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2022 #endif /* CONFIG_IWL4965_HT */
2023         }
2024
2025         /* Descriptor for chosen Tx queue */
2026         txq = &priv->txq[txq_id];
2027         q = &txq->q;
2028
2029         spin_lock_irqsave(&priv->lock, flags);
2030
2031         /* Set up first empty TFD within this queue's circular TFD buffer */
2032         tfd = &txq->bd[q->write_ptr];
2033         memset(tfd, 0, sizeof(*tfd));
2034         control_flags = (u32 *) tfd;
2035         idx = get_cmd_index(q, q->write_ptr, 0);
2036
2037         /* Set up driver data for this TFD */
2038         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2039         txq->txb[q->write_ptr].skb[0] = skb;
2040         memcpy(&(txq->txb[q->write_ptr].status.control),
2041                ctl, sizeof(struct ieee80211_tx_control));
2042
2043         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2044         out_cmd = &txq->cmd[idx];
2045         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2046         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2047
2048         /*
2049          * Set up the Tx-command (not MAC!) header.
2050          * Store the chosen Tx queue and TFD index within the sequence field;
2051          * after Tx, uCode's Tx response will return this value so driver can
2052          * locate the frame within the tx queue and do post-tx processing.
2053          */
2054         out_cmd->hdr.cmd = REPLY_TX;
2055         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2056                                 INDEX_TO_SEQ(q->write_ptr)));
2057
2058         /* Copy MAC header from skb into command buffer */
2059         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2060
2061         /*
2062          * Use the first empty entry in this queue's command buffer array
2063          * to contain the Tx command and MAC header concatenated together
2064          * (payload data will be in another buffer).
2065          * Size of this varies, due to varying MAC header length.
2066          * If end is not dword aligned, we'll have 2 extra bytes at the end
2067          * of the MAC header (device reads on dword boundaries).
2068          * We'll tell device about this padding later.
2069          */
2070         len = priv->hw_params.tx_cmd_len +
2071                 sizeof(struct iwl_cmd_header) + hdr_len;
2072
2073         len_org = len;
2074         len = (len + 3) & ~3;
2075
2076         if (len_org != len)
2077                 len_org = 1;
2078         else
2079                 len_org = 0;
2080
2081         /* Physical address of this Tx command's header (not MAC header!),
2082          * within command buffer array. */
2083         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2084                      offsetof(struct iwl_cmd, hdr);
2085
2086         /* Add buffer containing Tx command and MAC(!) header to TFD's
2087          * first entry */
2088         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2089
2090         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2091                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2092
2093         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2094          * if any (802.11 null frames have no payload). */
2095         len = skb->len - hdr_len;
2096         if (len) {
2097                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2098                                            len, PCI_DMA_TODEVICE);
2099                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2100         }
2101
2102         /* Tell 4965 about any 2-byte padding after MAC header */
2103         if (len_org)
2104                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2105
2106         /* Total # bytes to be transmitted */
2107         len = (u16)skb->len;
2108         out_cmd->cmd.tx.len = cpu_to_le16(len);
2109
2110         /* TODO need this for burst mode later on */
2111         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2112
2113         /* set is_hcca to 0; it probably will never be implemented */
2114         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2115
2116         iwl_update_tx_stats(priv, fc, len);
2117
2118         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2119                 offsetof(struct iwl4965_tx_cmd, scratch);
2120         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2121         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2122
2123         if (!ieee80211_get_morefrag(hdr)) {
2124                 txq->need_update = 1;
2125                 if (qc) {
2126                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2127                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2128                 }
2129         } else {
2130                 wait_write_ptr = 1;
2131                 txq->need_update = 0;
2132         }
2133
2134         iwl_print_hex_dump(priv, IWL_DL_TX, out_cmd->cmd.payload,
2135                            sizeof(out_cmd->cmd.tx));
2136
2137         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2138                            ieee80211_get_hdrlen(fc));
2139
2140         /* Set up entry for this TFD in Tx byte-count array */
2141         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2142
2143         /* Tell device the write index *just past* this latest filled TFD */
2144         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2145         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2146         spin_unlock_irqrestore(&priv->lock, flags);
2147
2148         if (rc)
2149                 return rc;
2150
2151         if ((iwl4965_queue_space(q) < q->high_mark)
2152             && priv->mac80211_registered) {
2153                 if (wait_write_ptr) {
2154                         spin_lock_irqsave(&priv->lock, flags);
2155                         txq->need_update = 1;
2156                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2157                         spin_unlock_irqrestore(&priv->lock, flags);
2158                 }
2159
2160                 ieee80211_stop_queue(priv->hw, ctl->queue);
2161         }
2162
2163         return 0;
2164
2165 drop_unlock:
2166         spin_unlock_irqrestore(&priv->lock, flags);
2167 drop:
2168         return -1;
2169 }
2170
2171 static void iwl4965_set_rate(struct iwl_priv *priv)
2172 {
2173         const struct ieee80211_supported_band *hw = NULL;
2174         struct ieee80211_rate *rate;
2175         int i;
2176
2177         hw = iwl_get_hw_mode(priv, priv->band);
2178         if (!hw) {
2179                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2180                 return;
2181         }
2182
2183         priv->active_rate = 0;
2184         priv->active_rate_basic = 0;
2185
2186         for (i = 0; i < hw->n_bitrates; i++) {
2187                 rate = &(hw->bitrates[i]);
2188                 if (rate->hw_value < IWL_RATE_COUNT)
2189                         priv->active_rate |= (1 << rate->hw_value);
2190         }
2191
2192         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2193                        priv->active_rate, priv->active_rate_basic);
2194
2195         /*
2196          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2197          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2198          * OFDM
2199          */
2200         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2201                 priv->staging_rxon.cck_basic_rates =
2202                     ((priv->active_rate_basic &
2203                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2204         else
2205                 priv->staging_rxon.cck_basic_rates =
2206                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2207
2208         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2209                 priv->staging_rxon.ofdm_basic_rates =
2210                     ((priv->active_rate_basic &
2211                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2212                       IWL_FIRST_OFDM_RATE) & 0xFF;
2213         else
2214                 priv->staging_rxon.ofdm_basic_rates =
2215                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2216 }
2217
2218 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2219 {
2220         unsigned long flags;
2221
2222         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2223                 return;
2224
2225         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2226                           disable_radio ? "OFF" : "ON");
2227
2228         if (disable_radio) {
2229                 iwl4965_scan_cancel(priv);
2230                 /* FIXME: This is a workaround for AP */
2231                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2232                         spin_lock_irqsave(&priv->lock, flags);
2233                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2234                                     CSR_UCODE_SW_BIT_RFKILL);
2235                         spin_unlock_irqrestore(&priv->lock, flags);
2236                         /* call the host command only if no hw rf-kill set */
2237                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2238                             iwl_is_ready(priv))
2239                                 iwl4965_send_card_state(priv,
2240                                                         CARD_STATE_CMD_DISABLE,
2241                                                         0);
2242                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2243
2244                         /* make sure mac80211 stop sending Tx frame */
2245                         if (priv->mac80211_registered)
2246                                 ieee80211_stop_queues(priv->hw);
2247                 }
2248                 return;
2249         }
2250
2251         spin_lock_irqsave(&priv->lock, flags);
2252         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2253
2254         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2255         spin_unlock_irqrestore(&priv->lock, flags);
2256
2257         /* wake up ucode */
2258         msleep(10);
2259
2260         spin_lock_irqsave(&priv->lock, flags);
2261         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2262         if (!iwl_grab_nic_access(priv))
2263                 iwl_release_nic_access(priv);
2264         spin_unlock_irqrestore(&priv->lock, flags);
2265
2266         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2267                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2268                                   "disabled by HW switch\n");
2269                 return;
2270         }
2271
2272         queue_work(priv->workqueue, &priv->restart);
2273         return;
2274 }
2275
2276 #define IWL_PACKET_RETRY_TIME HZ
2277
2278 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2279 {
2280         u16 sc = le16_to_cpu(header->seq_ctrl);
2281         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2282         u16 frag = sc & IEEE80211_SCTL_FRAG;
2283         u16 *last_seq, *last_frag;
2284         unsigned long *last_time;
2285
2286         switch (priv->iw_mode) {
2287         case IEEE80211_IF_TYPE_IBSS:{
2288                 struct list_head *p;
2289                 struct iwl4965_ibss_seq *entry = NULL;
2290                 u8 *mac = header->addr2;
2291                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2292
2293                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2294                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2295                         if (!compare_ether_addr(entry->mac, mac))
2296                                 break;
2297                 }
2298                 if (p == &priv->ibss_mac_hash[index]) {
2299                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2300                         if (!entry) {
2301                                 IWL_ERROR("Cannot malloc new mac entry\n");
2302                                 return 0;
2303                         }
2304                         memcpy(entry->mac, mac, ETH_ALEN);
2305                         entry->seq_num = seq;
2306                         entry->frag_num = frag;
2307                         entry->packet_time = jiffies;
2308                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2309                         return 0;
2310                 }
2311                 last_seq = &entry->seq_num;
2312                 last_frag = &entry->frag_num;
2313                 last_time = &entry->packet_time;
2314                 break;
2315         }
2316         case IEEE80211_IF_TYPE_STA:
2317                 last_seq = &priv->last_seq_num;
2318                 last_frag = &priv->last_frag_num;
2319                 last_time = &priv->last_packet_time;
2320                 break;
2321         default:
2322                 return 0;
2323         }
2324         if ((*last_seq == seq) &&
2325             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2326                 if (*last_frag == frag)
2327                         goto drop;
2328                 if (*last_frag + 1 != frag)
2329                         /* out-of-order fragment */
2330                         goto drop;
2331         } else
2332                 *last_seq = seq;
2333
2334         *last_frag = frag;
2335         *last_time = jiffies;
2336         return 0;
2337
2338  drop:
2339         return 1;
2340 }
2341
2342 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2343
2344 #include "iwl-spectrum.h"
2345
2346 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2347 #define BEACON_TIME_MASK_HIGH   0xFF000000
2348 #define TIME_UNIT               1024
2349
2350 /*
2351  * extended beacon time format
2352  * time in usec will be changed into a 32-bit value in 8:24 format
2353  * the high 1 byte is the beacon counts
2354  * the lower 3 bytes is the time in usec within one beacon interval
2355  */
2356
2357 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2358 {
2359         u32 quot;
2360         u32 rem;
2361         u32 interval = beacon_interval * 1024;
2362
2363         if (!interval || !usec)
2364                 return 0;
2365
2366         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2367         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2368
2369         return (quot << 24) + rem;
2370 }
2371
2372 /* base is usually what we get from ucode with each received frame,
2373  * the same as HW timer counter counting down
2374  */
2375
2376 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2377 {
2378         u32 base_low = base & BEACON_TIME_MASK_LOW;
2379         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2380         u32 interval = beacon_interval * TIME_UNIT;
2381         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2382             (addon & BEACON_TIME_MASK_HIGH);
2383
2384         if (base_low > addon_low)
2385                 res += base_low - addon_low;
2386         else if (base_low < addon_low) {
2387                 res += interval + base_low - addon_low;
2388                 res += (1 << 24);
2389         } else
2390                 res += (1 << 24);
2391
2392         return cpu_to_le32(res);
2393 }
2394
2395 static int iwl4965_get_measurement(struct iwl_priv *priv,
2396                                struct ieee80211_measurement_params *params,
2397                                u8 type)
2398 {
2399         struct iwl4965_spectrum_cmd spectrum;
2400         struct iwl_rx_packet *res;
2401         struct iwl_host_cmd cmd = {
2402                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2403                 .data = (void *)&spectrum,
2404                 .meta.flags = CMD_WANT_SKB,
2405         };
2406         u32 add_time = le64_to_cpu(params->start_time);
2407         int rc;
2408         int spectrum_resp_status;
2409         int duration = le16_to_cpu(params->duration);
2410
2411         if (iwl_is_associated(priv))
2412                 add_time =
2413                     iwl4965_usecs_to_beacons(
2414                         le64_to_cpu(params->start_time) - priv->last_tsf,
2415                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2416
2417         memset(&spectrum, 0, sizeof(spectrum));
2418
2419         spectrum.channel_count = cpu_to_le16(1);
2420         spectrum.flags =
2421             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2422         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2423         cmd.len = sizeof(spectrum);
2424         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2425
2426         if (iwl_is_associated(priv))
2427                 spectrum.start_time =
2428                     iwl4965_add_beacon_time(priv->last_beacon_time,
2429                                 add_time,
2430                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2431         else
2432                 spectrum.start_time = 0;
2433
2434         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2435         spectrum.channels[0].channel = params->channel;
2436         spectrum.channels[0].type = type;
2437         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2438                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2439                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2440
2441         rc = iwl_send_cmd_sync(priv, &cmd);
2442         if (rc)
2443                 return rc;
2444
2445         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
2446         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2447                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2448                 rc = -EIO;
2449         }
2450
2451         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2452         switch (spectrum_resp_status) {
2453         case 0:         /* Command will be handled */
2454                 if (res->u.spectrum.id != 0xff) {
2455                         IWL_DEBUG_INFO
2456                             ("Replaced existing measurement: %d\n",
2457                              res->u.spectrum.id);
2458                         priv->measurement_status &= ~MEASUREMENT_READY;
2459                 }
2460                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2461                 rc = 0;
2462                 break;
2463
2464         case 1:         /* Command will not be handled */
2465                 rc = -EAGAIN;
2466                 break;
2467         }
2468
2469         dev_kfree_skb_any(cmd.meta.u.skb);
2470
2471         return rc;
2472 }
2473 #endif
2474
2475 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2476                                  struct iwl4965_tx_info *tx_sta)
2477 {
2478
2479         tx_sta->status.ack_signal = 0;
2480         tx_sta->status.excessive_retries = 0;
2481
2482         if (in_interrupt())
2483                 ieee80211_tx_status_irqsafe(priv->hw,
2484                                             tx_sta->skb[0], &(tx_sta->status));
2485         else
2486                 ieee80211_tx_status(priv->hw,
2487                                     tx_sta->skb[0], &(tx_sta->status));
2488
2489         tx_sta->skb[0] = NULL;
2490 }
2491
2492 /**
2493  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2494  *
2495  * When FW advances 'R' index, all entries between old and new 'R' index
2496  * need to be reclaimed. As result, some free space forms.  If there is
2497  * enough free space (> low mark), wake the stack that feeds us.
2498  */
2499 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2500 {
2501         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2502         struct iwl4965_queue *q = &txq->q;
2503         int nfreed = 0;
2504
2505         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2506                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2507                           "is out of range [0-%d] %d %d.\n", txq_id,
2508                           index, q->n_bd, q->write_ptr, q->read_ptr);
2509                 return 0;
2510         }
2511
2512         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2513                 q->read_ptr != index;
2514                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2515                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2516                         iwl4965_txstatus_to_ieee(priv,
2517                                         &(txq->txb[txq->q.read_ptr]));
2518                         iwl4965_hw_txq_free_tfd(priv, txq);
2519                 } else if (nfreed > 1) {
2520                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2521                                         q->write_ptr, q->read_ptr);
2522                         queue_work(priv->workqueue, &priv->restart);
2523                 }
2524                 nfreed++;
2525         }
2526
2527         return nfreed;
2528 }
2529
2530 static int iwl4965_is_tx_success(u32 status)
2531 {
2532         status &= TX_STATUS_MSK;
2533         return (status == TX_STATUS_SUCCESS)
2534             || (status == TX_STATUS_DIRECT_DONE);
2535 }
2536
2537 /******************************************************************************
2538  *
2539  * Generic RX handler implementations
2540  *
2541  ******************************************************************************/
2542 #ifdef CONFIG_IWL4965_HT
2543
2544 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2545                                     struct ieee80211_hdr *hdr)
2546 {
2547         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2548                 return IWL_AP_ID;
2549         else {
2550                 u8 *da = ieee80211_get_DA(hdr);
2551                 return iwl_find_station(priv, da);
2552         }
2553 }
2554
2555 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2556         struct iwl_priv *priv, int txq_id, int idx)
2557 {
2558         if (priv->txq[txq_id].txb[idx].skb[0])
2559                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2560                                 txb[idx].skb[0]->data;
2561         return NULL;
2562 }
2563
2564 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2565 {
2566         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2567                                 tx_resp->frame_count);
2568         return le32_to_cpu(*scd_ssn) & MAX_SN;
2569
2570 }
2571
2572 /**
2573  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2574  */
2575 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2576                                       struct iwl_ht_agg *agg,
2577                                       struct iwl4965_tx_resp_agg *tx_resp,
2578                                       u16 start_idx)
2579 {
2580         u16 status;
2581         struct agg_tx_status *frame_status = &tx_resp->status;
2582         struct ieee80211_tx_status *tx_status = NULL;
2583         struct ieee80211_hdr *hdr = NULL;
2584         int i, sh;
2585         int txq_id, idx;
2586         u16 seq;
2587
2588         if (agg->wait_for_ba)
2589                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2590
2591         agg->frame_count = tx_resp->frame_count;
2592         agg->start_idx = start_idx;
2593         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2594         agg->bitmap = 0;
2595
2596         /* # frames attempted by Tx command */
2597         if (agg->frame_count == 1) {
2598                 /* Only one frame was attempted; no block-ack will arrive */
2599                 status = le16_to_cpu(frame_status[0].status);
2600                 seq  = le16_to_cpu(frame_status[0].sequence);
2601                 idx = SEQ_TO_INDEX(seq);
2602                 txq_id = SEQ_TO_QUEUE(seq);
2603
2604                 /* FIXME: code repetition */
2605                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2606                                    agg->frame_count, agg->start_idx, idx);
2607
2608                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2609                 tx_status->retry_count = tx_resp->failure_frame;
2610                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2611                 tx_status->flags = iwl4965_is_tx_success(status)?
2612                         IEEE80211_TX_STATUS_ACK : 0;
2613                 iwl4965_hwrate_to_tx_control(priv,
2614                                              le32_to_cpu(tx_resp->rate_n_flags),
2615                                              &tx_status->control);
2616                 /* FIXME: code repetition end */
2617
2618                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2619                                     status & 0xff, tx_resp->failure_frame);
2620                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2621                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2622
2623                 agg->wait_for_ba = 0;
2624         } else {
2625                 /* Two or more frames were attempted; expect block-ack */
2626                 u64 bitmap = 0;
2627                 int start = agg->start_idx;
2628
2629                 /* Construct bit-map of pending frames within Tx window */
2630                 for (i = 0; i < agg->frame_count; i++) {
2631                         u16 sc;
2632                         status = le16_to_cpu(frame_status[i].status);
2633                         seq  = le16_to_cpu(frame_status[i].sequence);
2634                         idx = SEQ_TO_INDEX(seq);
2635                         txq_id = SEQ_TO_QUEUE(seq);
2636
2637                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2638                                       AGG_TX_STATE_ABORT_MSK))
2639                                 continue;
2640
2641                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2642                                            agg->frame_count, txq_id, idx);
2643
2644                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2645
2646                         sc = le16_to_cpu(hdr->seq_ctrl);
2647                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2648                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2649                                           " idx=%d, seq_idx=%d, seq=%d\n",
2650                                           idx, SEQ_TO_SN(sc),
2651                                           hdr->seq_ctrl);
2652                                 return -1;
2653                         }
2654
2655                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2656                                            i, idx, SEQ_TO_SN(sc));
2657
2658                         sh = idx - start;
2659                         if (sh > 64) {
2660                                 sh = (start - idx) + 0xff;
2661                                 bitmap = bitmap << sh;
2662                                 sh = 0;
2663                                 start = idx;
2664                         } else if (sh < -64)
2665                                 sh  = 0xff - (start - idx);
2666                         else if (sh < 0) {
2667                                 sh = start - idx;
2668                                 start = idx;
2669                                 bitmap = bitmap << sh;
2670                                 sh = 0;
2671                         }
2672                         bitmap |= (1 << sh);
2673                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2674                                            start, (u32)(bitmap & 0xFFFFFFFF));
2675                 }
2676
2677                 agg->bitmap = bitmap;
2678                 agg->start_idx = start;
2679                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2680                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2681                                    agg->frame_count, agg->start_idx,
2682                                    (unsigned long long)agg->bitmap);
2683
2684                 if (bitmap)
2685                         agg->wait_for_ba = 1;
2686         }
2687         return 0;
2688 }
2689 #endif
2690
2691 /**
2692  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2693  */
2694 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2695                                 struct iwl_rx_mem_buffer *rxb)
2696 {
2697         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2698         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2699         int txq_id = SEQ_TO_QUEUE(sequence);
2700         int index = SEQ_TO_INDEX(sequence);
2701         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2702         struct ieee80211_tx_status *tx_status;
2703         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2704         u32  status = le32_to_cpu(tx_resp->status);
2705 #ifdef CONFIG_IWL4965_HT
2706         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2707         struct ieee80211_hdr *hdr;
2708         __le16 *qc;
2709 #endif
2710
2711         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2712                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2713                           "is out of range [0-%d] %d %d\n", txq_id,
2714                           index, txq->q.n_bd, txq->q.write_ptr,
2715                           txq->q.read_ptr);
2716                 return;
2717         }
2718
2719 #ifdef CONFIG_IWL4965_HT
2720         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2721         qc = ieee80211_get_qos_ctrl(hdr);
2722
2723         if (qc)
2724                 tid = le16_to_cpu(*qc) & 0xf;
2725
2726         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2727         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2728                 IWL_ERROR("Station not known\n");
2729                 return;
2730         }
2731
2732         if (txq->sched_retry) {
2733                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2734                 struct iwl_ht_agg *agg = NULL;
2735
2736                 if (!qc)
2737                         return;
2738
2739                 agg = &priv->stations[sta_id].tid[tid].agg;
2740
2741                 iwl4965_tx_status_reply_tx(priv, agg,
2742                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2743
2744                 if ((tx_resp->frame_count == 1) &&
2745                     !iwl4965_is_tx_success(status)) {
2746                         /* TODO: send BAR */
2747                 }
2748
2749                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2750                         int freed, ampdu_q;
2751                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2752                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2753                                            "%d index %d\n", scd_ssn , index);
2754                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2755                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2756
2757                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2758                             txq_id >= 0 && priv->mac80211_registered &&
2759                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
2760                                 /* calculate mac80211 ampdu sw queue to wake */
2761                                 ampdu_q = txq_id - IWL_BACK_QUEUE_FIRST_ID +
2762                                           priv->hw->queues;
2763                                 if (agg->state == IWL_AGG_OFF)
2764                                         ieee80211_wake_queue(priv->hw, txq_id);
2765                                 else
2766                                         ieee80211_wake_queue(priv->hw, ampdu_q);
2767                         }
2768                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2769                 }
2770         } else {
2771 #endif /* CONFIG_IWL4965_HT */
2772         tx_status = &(txq->txb[txq->q.read_ptr].status);
2773
2774         tx_status->retry_count = tx_resp->failure_frame;
2775         tx_status->flags =
2776             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2777         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2778                                      &tx_status->control);
2779
2780         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2781                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2782                      status, le32_to_cpu(tx_resp->rate_n_flags),
2783                      tx_resp->failure_frame);
2784
2785         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2786         if (index != -1) {
2787                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2788 #ifdef CONFIG_IWL4965_HT
2789                 if (tid != MAX_TID_COUNT)
2790                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2791                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2792                         (txq_id >= 0) && priv->mac80211_registered)
2793                         ieee80211_wake_queue(priv->hw, txq_id);
2794                 if (tid != MAX_TID_COUNT)
2795                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2796 #endif
2797         }
2798 #ifdef CONFIG_IWL4965_HT
2799         }
2800 #endif /* CONFIG_IWL4965_HT */
2801
2802         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2803                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2804 }
2805
2806
2807 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2808                                    struct iwl_rx_mem_buffer *rxb)
2809 {
2810         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2811         struct iwl4965_alive_resp *palive;
2812         struct delayed_work *pwork;
2813
2814         palive = &pkt->u.alive_frame;
2815
2816         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2817                        "0x%01X 0x%01X\n",
2818                        palive->is_valid, palive->ver_type,
2819                        palive->ver_subtype);
2820
2821         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2822                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2823                 memcpy(&priv->card_alive_init,
2824                        &pkt->u.alive_frame,
2825                        sizeof(struct iwl4965_init_alive_resp));
2826                 pwork = &priv->init_alive_start;
2827         } else {
2828                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2829                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2830                        sizeof(struct iwl4965_alive_resp));
2831                 pwork = &priv->alive_start;
2832         }
2833
2834         /* We delay the ALIVE response by 5ms to
2835          * give the HW RF Kill time to activate... */
2836         if (palive->is_valid == UCODE_VALID_OK)
2837                 queue_delayed_work(priv->workqueue, pwork,
2838                                    msecs_to_jiffies(5));
2839         else
2840                 IWL_WARNING("uCode did not respond OK.\n");
2841 }
2842
2843 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2844                                      struct iwl_rx_mem_buffer *rxb)
2845 {
2846         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2847
2848         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2849         return;
2850 }
2851
2852 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2853                                    struct iwl_rx_mem_buffer *rxb)
2854 {
2855         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2856
2857         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2858                 "seq 0x%04X ser 0x%08X\n",
2859                 le32_to_cpu(pkt->u.err_resp.error_type),
2860                 get_cmd_string(pkt->u.err_resp.cmd_id),
2861                 pkt->u.err_resp.cmd_id,
2862                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2863                 le32_to_cpu(pkt->u.err_resp.error_info));
2864 }
2865
2866 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2867
2868 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
2869 {
2870         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2871         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2872         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2873         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2874                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2875         rxon->channel = csa->channel;
2876         priv->staging_rxon.channel = csa->channel;
2877 }
2878
2879 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2880                                           struct iwl_rx_mem_buffer *rxb)
2881 {
2882 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2883         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2884         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2885
2886         if (!report->state) {
2887                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2888                           "Spectrum Measure Notification: Start\n");
2889                 return;
2890         }
2891
2892         memcpy(&priv->measure_report, report, sizeof(*report));
2893         priv->measurement_status |= MEASUREMENT_READY;
2894 #endif
2895 }
2896
2897 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2898                                       struct iwl_rx_mem_buffer *rxb)
2899 {
2900 #ifdef CONFIG_IWLWIFI_DEBUG
2901         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2902         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2903         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2904                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2905 #endif
2906 }
2907
2908 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2909                                              struct iwl_rx_mem_buffer *rxb)
2910 {
2911         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2912         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2913                         "notification for %s:\n",
2914                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2915         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2916 }
2917
2918 static void iwl4965_bg_beacon_update(struct work_struct *work)
2919 {
2920         struct iwl_priv *priv =
2921                 container_of(work, struct iwl_priv, beacon_update);
2922         struct sk_buff *beacon;
2923
2924         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2925         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2926
2927         if (!beacon) {
2928                 IWL_ERROR("update beacon failed\n");
2929                 return;
2930         }
2931
2932         mutex_lock(&priv->mutex);
2933         /* new beacon skb is allocated every time; dispose previous.*/
2934         if (priv->ibss_beacon)
2935                 dev_kfree_skb(priv->ibss_beacon);
2936
2937         priv->ibss_beacon = beacon;
2938         mutex_unlock(&priv->mutex);
2939
2940         iwl4965_send_beacon_cmd(priv);
2941 }
2942
2943 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2944                                 struct iwl_rx_mem_buffer *rxb)
2945 {
2946 #ifdef CONFIG_IWLWIFI_DEBUG
2947         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2948         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
2949         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
2950
2951         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
2952                 "tsf %d %d rate %d\n",
2953                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
2954                 beacon->beacon_notify_hdr.failure_frame,
2955                 le32_to_cpu(beacon->ibss_mgr_status),
2956                 le32_to_cpu(beacon->high_tsf),
2957                 le32_to_cpu(beacon->low_tsf), rate);
2958 #endif
2959
2960         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
2961             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
2962                 queue_work(priv->workqueue, &priv->beacon_update);
2963 }
2964
2965 /* Service response to REPLY_SCAN_CMD (0x80) */
2966 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
2967                               struct iwl_rx_mem_buffer *rxb)
2968 {
2969 #ifdef CONFIG_IWLWIFI_DEBUG
2970         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2971         struct iwl4965_scanreq_notification *notif =
2972             (struct iwl4965_scanreq_notification *)pkt->u.raw;
2973
2974         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
2975 #endif
2976 }
2977
2978 /* Service SCAN_START_NOTIFICATION (0x82) */
2979 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
2980                                     struct iwl_rx_mem_buffer *rxb)
2981 {
2982         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2983         struct iwl4965_scanstart_notification *notif =
2984             (struct iwl4965_scanstart_notification *)pkt->u.raw;
2985         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
2986         IWL_DEBUG_SCAN("Scan start: "
2987                        "%d [802.11%s] "
2988                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
2989                        notif->channel,
2990                        notif->band ? "bg" : "a",
2991                        notif->tsf_high,
2992                        notif->tsf_low, notif->status, notif->beacon_timer);
2993 }
2994
2995 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
2996 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
2997                                       struct iwl_rx_mem_buffer *rxb)
2998 {
2999         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3000         struct iwl4965_scanresults_notification *notif =
3001             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3002
3003         IWL_DEBUG_SCAN("Scan ch.res: "
3004                        "%d [802.11%s] "
3005                        "(TSF: 0x%08X:%08X) - %d "
3006                        "elapsed=%lu usec (%dms since last)\n",
3007                        notif->channel,
3008                        notif->band ? "bg" : "a",
3009                        le32_to_cpu(notif->tsf_high),
3010                        le32_to_cpu(notif->tsf_low),
3011                        le32_to_cpu(notif->statistics[0]),
3012                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3013                        jiffies_to_msecs(elapsed_jiffies
3014                                         (priv->last_scan_jiffies, jiffies)));
3015
3016         priv->last_scan_jiffies = jiffies;
3017         priv->next_scan_jiffies = 0;
3018 }
3019
3020 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3021 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3022                                        struct iwl_rx_mem_buffer *rxb)
3023 {
3024         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3025         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3026
3027         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3028                        scan_notif->scanned_channels,
3029                        scan_notif->tsf_low,
3030                        scan_notif->tsf_high, scan_notif->status);
3031
3032         /* The HW is no longer scanning */
3033         clear_bit(STATUS_SCAN_HW, &priv->status);
3034
3035         /* The scan completion notification came in, so kill that timer... */
3036         cancel_delayed_work(&priv->scan_check);
3037
3038         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3039                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3040                        jiffies_to_msecs(elapsed_jiffies
3041                                         (priv->scan_pass_start, jiffies)));
3042
3043         /* Remove this scanned band from the list
3044          * of pending bands to scan */
3045         priv->scan_bands--;
3046
3047         /* If a request to abort was given, or the scan did not succeed
3048          * then we reset the scan state machine and terminate,
3049          * re-queuing another scan if one has been requested */
3050         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3051                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3052                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3053         } else {
3054                 /* If there are more bands on this scan pass reschedule */
3055                 if (priv->scan_bands > 0)
3056                         goto reschedule;
3057         }
3058
3059         priv->last_scan_jiffies = jiffies;
3060         priv->next_scan_jiffies = 0;
3061         IWL_DEBUG_INFO("Setting scan to off\n");
3062
3063         clear_bit(STATUS_SCANNING, &priv->status);
3064
3065         IWL_DEBUG_INFO("Scan took %dms\n",
3066                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3067
3068         queue_work(priv->workqueue, &priv->scan_completed);
3069
3070         return;
3071
3072 reschedule:
3073         priv->scan_pass_start = jiffies;
3074         queue_work(priv->workqueue, &priv->request_scan);
3075 }
3076
3077 /* Handle notification from uCode that card's power state is changing
3078  * due to software, hardware, or critical temperature RFKILL */
3079 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3080                                     struct iwl_rx_mem_buffer *rxb)
3081 {
3082         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3083         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3084         unsigned long status = priv->status;
3085
3086         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3087                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3088                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3089
3090         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3091                      RF_CARD_DISABLED)) {
3092
3093                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3094                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3095
3096                 if (!iwl_grab_nic_access(priv)) {
3097                         iwl_write_direct32(
3098                                 priv, HBUS_TARG_MBX_C,
3099                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3100
3101                         iwl_release_nic_access(priv);
3102                 }
3103
3104                 if (!(flags & RXON_CARD_DISABLED)) {
3105                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3106                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3107                         if (!iwl_grab_nic_access(priv)) {
3108                                 iwl_write_direct32(
3109                                         priv, HBUS_TARG_MBX_C,
3110                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3111
3112                                 iwl_release_nic_access(priv);
3113                         }
3114                 }
3115
3116                 if (flags & RF_CARD_DISABLED) {
3117                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3118                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3119                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3120                         if (!iwl_grab_nic_access(priv))
3121                                 iwl_release_nic_access(priv);
3122                 }
3123         }
3124
3125         if (flags & HW_CARD_DISABLED)
3126                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3127         else
3128                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3129
3130
3131         if (flags & SW_CARD_DISABLED)
3132                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3133         else
3134                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3135
3136         if (!(flags & RXON_CARD_DISABLED))
3137                 iwl4965_scan_cancel(priv);
3138
3139         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3140              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3141             (test_bit(STATUS_RF_KILL_SW, &status) !=
3142              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3143                 queue_work(priv->workqueue, &priv->rf_kill);
3144         else
3145                 wake_up_interruptible(&priv->wait_command_queue);
3146 }
3147
3148 /**
3149  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3150  *
3151  * Setup the RX handlers for each of the reply types sent from the uCode
3152  * to the host.
3153  *
3154  * This function chains into the hardware specific files for them to setup
3155  * any hardware specific handlers as well.
3156  */
3157 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3158 {
3159         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3160         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3161         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3162         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3163         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3164             iwl4965_rx_spectrum_measure_notif;
3165         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3166         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3167             iwl4965_rx_pm_debug_statistics_notif;
3168         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3169
3170         /*
3171          * The same handler is used for both the REPLY to a discrete
3172          * statistics request from the host as well as for the periodic
3173          * statistics notifications (after received beacons) from the uCode.
3174          */
3175         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3176         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3177
3178         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3179         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3180         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3181             iwl4965_rx_scan_results_notif;
3182         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3183             iwl4965_rx_scan_complete_notif;
3184         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3185         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3186
3187         /* Set up hardware specific Rx handlers */
3188         priv->cfg->ops->lib->rx_handler_setup(priv);
3189 }
3190
3191 /**
3192  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3193  * @rxb: Rx buffer to reclaim
3194  *
3195  * If an Rx buffer has an async callback associated with it the callback
3196  * will be executed.  The attached skb (if present) will only be freed
3197  * if the callback returns 1
3198  */
3199 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3200                                     struct iwl_rx_mem_buffer *rxb)
3201 {
3202         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3203         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3204         int txq_id = SEQ_TO_QUEUE(sequence);
3205         int index = SEQ_TO_INDEX(sequence);
3206         int huge = sequence & SEQ_HUGE_FRAME;
3207         int cmd_index;
3208         struct iwl_cmd *cmd;
3209
3210         /* If a Tx command is being handled and it isn't in the actual
3211          * command queue then there a command routing bug has been introduced
3212          * in the queue management code. */
3213         if (txq_id != IWL_CMD_QUEUE_NUM)
3214                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3215                           txq_id, pkt->hdr.cmd);
3216         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3217
3218         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3219         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3220
3221         /* Input error checking is done when commands are added to queue. */
3222         if (cmd->meta.flags & CMD_WANT_SKB) {
3223                 cmd->meta.source->u.skb = rxb->skb;
3224                 rxb->skb = NULL;
3225         } else if (cmd->meta.u.callback &&
3226                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3227                 rxb->skb = NULL;
3228
3229         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3230
3231         if (!(cmd->meta.flags & CMD_ASYNC)) {
3232                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3233                 wake_up_interruptible(&priv->wait_command_queue);
3234         }
3235 }
3236
3237 /*
3238  * this should be called while priv->lock is locked
3239 */
3240 static void __iwl_rx_replenish(struct iwl_priv *priv)
3241 {
3242         iwl_rx_allocate(priv);
3243         iwl_rx_queue_restock(priv);
3244 }
3245
3246
3247 /**
3248  * iwl_rx_handle - Main entry function for receiving responses from uCode
3249  *
3250  * Uses the priv->rx_handlers callback function array to invoke
3251  * the appropriate handlers, including command responses,
3252  * frame-received notifications, and other notifications.
3253  */
3254 void iwl_rx_handle(struct iwl_priv *priv)
3255 {
3256         struct iwl_rx_mem_buffer *rxb;
3257         struct iwl_rx_packet *pkt;
3258         struct iwl_rx_queue *rxq = &priv->rxq;
3259         u32 r, i;
3260         int reclaim;
3261         unsigned long flags;
3262         u8 fill_rx = 0;
3263         u32 count = 8;
3264
3265         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3266          * buffer that the driver may process (last buffer filled by ucode). */
3267         r = iwl4965_hw_get_rx_read(priv);
3268         i = rxq->read;
3269
3270         /* Rx interrupt, but nothing sent from uCode */
3271         if (i == r)
3272                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3273
3274         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3275                 fill_rx = 1;
3276
3277         while (i != r) {
3278                 rxb = rxq->queue[i];
3279
3280                 /* If an RXB doesn't have a Rx queue slot associated with it,
3281                  * then a bug has been introduced in the queue refilling
3282                  * routines -- catch it here */
3283                 BUG_ON(rxb == NULL);
3284
3285                 rxq->queue[i] = NULL;
3286
3287                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3288                                             priv->hw_params.rx_buf_size,
3289                                             PCI_DMA_FROMDEVICE);
3290                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
3291
3292                 /* Reclaim a command buffer only if this packet is a response
3293                  *   to a (driver-originated) command.
3294                  * If the packet (e.g. Rx frame) originated from uCode,
3295                  *   there is no command buffer to reclaim.
3296                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3297                  *   but apparently a few don't get set; catch them here. */
3298                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3299                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3300                         (pkt->hdr.cmd != REPLY_RX) &&
3301                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3302                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3303                         (pkt->hdr.cmd != REPLY_TX);
3304
3305                 /* Based on type of command response or notification,
3306                  *   handle those that need handling via function in
3307                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3308                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3309                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3310                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3311                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3312                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3313                 } else {
3314                         /* No handling needed */
3315                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3316                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3317                                 r, i, get_cmd_string(pkt->hdr.cmd),
3318                                 pkt->hdr.cmd);
3319                 }
3320
3321                 if (reclaim) {
3322                         /* Invoke any callbacks, transfer the skb to caller, and
3323                          * fire off the (possibly) blocking iwl_send_cmd()
3324                          * as we reclaim the driver command queue */
3325                         if (rxb && rxb->skb)
3326                                 iwl4965_tx_cmd_complete(priv, rxb);
3327                         else
3328                                 IWL_WARNING("Claim null rxb?\n");
3329                 }
3330
3331                 /* For now we just don't re-use anything.  We can tweak this
3332                  * later to try and re-use notification packets and SKBs that
3333                  * fail to Rx correctly */
3334                 if (rxb->skb != NULL) {
3335                         priv->alloc_rxb_skb--;
3336                         dev_kfree_skb_any(rxb->skb);
3337                         rxb->skb = NULL;
3338                 }
3339
3340                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3341                                  priv->hw_params.rx_buf_size,
3342                                  PCI_DMA_FROMDEVICE);
3343                 spin_lock_irqsave(&rxq->lock, flags);
3344                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3345                 spin_unlock_irqrestore(&rxq->lock, flags);
3346                 i = (i + 1) & RX_QUEUE_MASK;
3347                 /* If there are a lot of unused frames,
3348                  * restock the Rx queue so ucode wont assert. */
3349                 if (fill_rx) {
3350                         count++;
3351                         if (count >= 8) {
3352                                 priv->rxq.read = i;
3353                                 __iwl_rx_replenish(priv);
3354                                 count = 0;
3355                         }
3356                 }
3357         }
3358
3359         /* Backtrack one entry */
3360         priv->rxq.read = i;
3361         iwl_rx_queue_restock(priv);
3362 }
3363 /* Convert linear signal-to-noise ratio into dB */
3364 static u8 ratio2dB[100] = {
3365 /*       0   1   2   3   4   5   6   7   8   9 */
3366          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3367         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3368         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3369         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3370         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3371         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3372         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3373         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3374         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3375         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3376 };
3377
3378 /* Calculates a relative dB value from a ratio of linear
3379  *   (i.e. not dB) signal levels.
3380  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3381 int iwl4965_calc_db_from_ratio(int sig_ratio)
3382 {
3383         /* 1000:1 or higher just report as 60 dB */
3384         if (sig_ratio >= 1000)
3385                 return 60;
3386
3387         /* 100:1 or higher, divide by 10 and use table,
3388          *   add 20 dB to make up for divide by 10 */
3389         if (sig_ratio >= 100)
3390                 return (20 + (int)ratio2dB[sig_ratio/10]);
3391
3392         /* We shouldn't see this */
3393         if (sig_ratio < 1)
3394                 return 0;
3395
3396         /* Use table for ratios 1:1 - 99:1 */
3397         return (int)ratio2dB[sig_ratio];
3398 }
3399
3400 #define PERFECT_RSSI (-20) /* dBm */
3401 #define WORST_RSSI (-95)   /* dBm */
3402 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3403
3404 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3405  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3406  *   about formulas used below. */
3407 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3408 {
3409         int sig_qual;
3410         int degradation = PERFECT_RSSI - rssi_dbm;
3411
3412         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3413          * as indicator; formula is (signal dbm - noise dbm).
3414          * SNR at or above 40 is a great signal (100%).
3415          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3416          * Weakest usable signal is usually 10 - 15 dB SNR. */
3417         if (noise_dbm) {
3418                 if (rssi_dbm - noise_dbm >= 40)
3419                         return 100;
3420                 else if (rssi_dbm < noise_dbm)
3421                         return 0;
3422                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3423
3424         /* Else use just the signal level.
3425          * This formula is a least squares fit of data points collected and
3426          *   compared with a reference system that had a percentage (%) display
3427          *   for signal quality. */
3428         } else
3429                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3430                             (15 * RSSI_RANGE + 62 * degradation)) /
3431                            (RSSI_RANGE * RSSI_RANGE);
3432
3433         if (sig_qual > 100)
3434                 sig_qual = 100;
3435         else if (sig_qual < 1)
3436                 sig_qual = 0;
3437
3438         return sig_qual;
3439 }
3440
3441 /**
3442  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3443  */
3444 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3445                                   struct iwl4965_tx_queue *txq)
3446 {
3447         u32 reg = 0;
3448         int rc = 0;
3449         int txq_id = txq->q.id;
3450
3451         if (txq->need_update == 0)
3452                 return rc;
3453
3454         /* if we're trying to save power */
3455         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3456                 /* wake up nic if it's powered down ...
3457                  * uCode will wake up, and interrupt us again, so next
3458                  * time we'll skip this part. */
3459                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3460
3461                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3462                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3463                         iwl_set_bit(priv, CSR_GP_CNTRL,
3464                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3465                         return rc;
3466                 }
3467
3468                 /* restore this queue's parameters in nic hardware. */
3469                 rc = iwl_grab_nic_access(priv);
3470                 if (rc)
3471                         return rc;
3472                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3473                                      txq->q.write_ptr | (txq_id << 8));
3474                 iwl_release_nic_access(priv);
3475
3476         /* else not in power-save mode, uCode will never sleep when we're
3477          * trying to tx (during RFKILL, we're not trying to tx). */
3478         } else
3479                 iwl_write32(priv, HBUS_TARG_WRPTR,
3480                             txq->q.write_ptr | (txq_id << 8));
3481
3482         txq->need_update = 0;
3483
3484         return rc;
3485 }
3486
3487 #ifdef CONFIG_IWLWIFI_DEBUG
3488 static void iwl4965_print_rx_config_cmd(struct iwl_priv *priv)
3489 {
3490         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
3491         DECLARE_MAC_BUF(mac);
3492
3493         IWL_DEBUG_RADIO("RX CONFIG:\n");
3494         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3495         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3496         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3497         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3498                         le32_to_cpu(rxon->filter_flags));
3499         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3500         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3501                         rxon->ofdm_basic_rates);
3502         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3503         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3504                         print_mac(mac, rxon->node_addr));
3505         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3506                         print_mac(mac, rxon->bssid_addr));
3507         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3508 }
3509 #endif
3510
3511 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3512 {
3513         IWL_DEBUG_ISR("Enabling interrupts\n");
3514         set_bit(STATUS_INT_ENABLED, &priv->status);
3515         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3516 }
3517
3518 /* call this function to flush any scheduled tasklet */
3519 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3520 {
3521         /* wait to make sure we flush pedding tasklet*/
3522         synchronize_irq(priv->pci_dev->irq);
3523         tasklet_kill(&priv->irq_tasklet);
3524 }
3525
3526 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3527 {
3528         clear_bit(STATUS_INT_ENABLED, &priv->status);
3529
3530         /* disable interrupts from uCode/NIC to host */
3531         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3532
3533         /* acknowledge/clear/reset any interrupts still pending
3534          * from uCode or flow handler (Rx/Tx DMA) */
3535         iwl_write32(priv, CSR_INT, 0xffffffff);
3536         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3537         IWL_DEBUG_ISR("Disabled interrupts\n");
3538 }
3539
3540 static const char *desc_lookup(int i)
3541 {
3542         switch (i) {
3543         case 1:
3544                 return "FAIL";
3545         case 2:
3546                 return "BAD_PARAM";
3547         case 3:
3548                 return "BAD_CHECKSUM";
3549         case 4:
3550                 return "NMI_INTERRUPT";
3551         case 5:
3552                 return "SYSASSERT";
3553         case 6:
3554                 return "FATAL_ERROR";
3555         }
3556
3557         return "UNKNOWN";
3558 }
3559
3560 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3561 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3562
3563 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3564 {
3565         u32 data2, line;
3566         u32 desc, time, count, base, data1;
3567         u32 blink1, blink2, ilink1, ilink2;
3568         int rc;
3569
3570         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3571
3572         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3573                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3574                 return;
3575         }
3576
3577         rc = iwl_grab_nic_access(priv);
3578         if (rc) {
3579                 IWL_WARNING("Can not read from adapter at this time.\n");
3580                 return;
3581         }
3582
3583         count = iwl_read_targ_mem(priv, base);
3584
3585         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3586                 IWL_ERROR("Start IWL Error Log Dump:\n");
3587                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3588         }
3589
3590         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3591         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3592         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3593         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3594         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3595         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3596         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3597         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3598         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3599
3600         IWL_ERROR("Desc               Time       "
3601                   "data1      data2      line\n");
3602         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3603                   desc_lookup(desc), desc, time, data1, data2, line);
3604         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
3605         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3606                   ilink1, ilink2);
3607
3608         iwl_release_nic_access(priv);
3609 }
3610
3611 #define EVENT_START_OFFSET  (4 * sizeof(u32))
3612
3613 /**
3614  * iwl4965_print_event_log - Dump error event log to syslog
3615  *
3616  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
3617  */
3618 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
3619                                 u32 num_events, u32 mode)
3620 {
3621         u32 i;
3622         u32 base;       /* SRAM byte address of event log header */
3623         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
3624         u32 ptr;        /* SRAM byte address of log data */
3625         u32 ev, time, data; /* event log data */
3626
3627         if (num_events == 0)
3628                 return;
3629
3630         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3631
3632         if (mode == 0)
3633                 event_size = 2 * sizeof(u32);
3634         else
3635                 event_size = 3 * sizeof(u32);
3636
3637         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
3638
3639         /* "time" is actually "data" for mode 0 (no timestamp).
3640          * place event id # at far right for easier visual parsing. */
3641         for (i = 0; i < num_events; i++) {
3642                 ev = iwl_read_targ_mem(priv, ptr);
3643                 ptr += sizeof(u32);
3644                 time = iwl_read_targ_mem(priv, ptr);
3645                 ptr += sizeof(u32);
3646                 if (mode == 0)
3647                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
3648                 else {
3649                         data = iwl_read_targ_mem(priv, ptr);
3650                         ptr += sizeof(u32);
3651                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
3652                 }
3653         }
3654 }
3655
3656 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
3657 {
3658         int rc;
3659         u32 base;       /* SRAM byte address of event log header */
3660         u32 capacity;   /* event log capacity in # entries */
3661         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
3662         u32 num_wraps;  /* # times uCode wrapped to top of log */
3663         u32 next_entry; /* index of next entry to be written by uCode */
3664         u32 size;       /* # entries that we'll print */
3665
3666         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3667         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3668                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
3669                 return;
3670         }
3671
3672         rc = iwl_grab_nic_access(priv);
3673         if (rc) {
3674                 IWL_WARNING("Can not read from adapter at this time.\n");
3675                 return;
3676         }
3677
3678         /* event log header */
3679         capacity = iwl_read_targ_mem(priv, base);
3680         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
3681         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
3682         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
3683
3684         size = num_wraps ? capacity : next_entry;
3685
3686         /* bail out if nothing in log */
3687         if (size == 0) {
3688                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
3689                 iwl_release_nic_access(priv);
3690                 return;
3691         }
3692
3693         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
3694                   size, num_wraps);
3695
3696         /* if uCode has wrapped back to top of log, start at the oldest entry,
3697          * i.e the next one that uCode would fill. */
3698         if (num_wraps)
3699                 iwl4965_print_event_log(priv, next_entry,
3700                                     capacity - next_entry, mode);
3701
3702         /* (then/else) start at top of log */
3703         iwl4965_print_event_log(priv, 0, next_entry, mode);
3704
3705         iwl_release_nic_access(priv);
3706 }
3707
3708 /**
3709  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
3710  */
3711 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
3712 {
3713         /* Set the FW error flag -- cleared on iwl4965_down */
3714         set_bit(STATUS_FW_ERROR, &priv->status);
3715
3716         /* Cancel currently queued command. */
3717         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3718
3719 #ifdef CONFIG_IWLWIFI_DEBUG
3720         if (priv->debug_level & IWL_DL_FW_ERRORS) {
3721                 iwl4965_dump_nic_error_log(priv);
3722                 iwl4965_dump_nic_event_log(priv);
3723                 iwl4965_print_rx_config_cmd(priv);
3724         }
3725 #endif
3726
3727         wake_up_interruptible(&priv->wait_command_queue);
3728
3729         /* Keep the restart process from trying to send host
3730          * commands by clearing the INIT status bit */
3731         clear_bit(STATUS_READY, &priv->status);
3732
3733         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3734                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
3735                           "Restarting adapter due to uCode error.\n");
3736
3737                 if (iwl_is_associated(priv)) {
3738                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
3739                                sizeof(priv->recovery_rxon));
3740                         priv->error_recovering = 1;
3741                 }
3742                 queue_work(priv->workqueue, &priv->restart);
3743         }
3744 }
3745
3746 static void iwl4965_error_recovery(struct iwl_priv *priv)
3747 {
3748         unsigned long flags;
3749
3750         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
3751                sizeof(priv->staging_rxon));
3752         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3753         iwl4965_commit_rxon(priv);
3754
3755         iwl4965_rxon_add_station(priv, priv->bssid, 1);
3756
3757         spin_lock_irqsave(&priv->lock, flags);
3758         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
3759         priv->error_recovering = 0;
3760         spin_unlock_irqrestore(&priv->lock, flags);
3761 }
3762
3763 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
3764 {
3765         u32 inta, handled = 0;
3766         u32 inta_fh;
3767         unsigned long flags;
3768 #ifdef CONFIG_IWLWIFI_DEBUG
3769         u32 inta_mask;
3770 #endif
3771
3772         spin_lock_irqsave(&priv->lock, flags);
3773
3774         /* Ack/clear/reset pending uCode interrupts.
3775          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
3776          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
3777         inta = iwl_read32(priv, CSR_INT);
3778         iwl_write32(priv, CSR_INT, inta);
3779
3780         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
3781          * Any new interrupts that happen after this, either while we're
3782          * in this tasklet, or later, will show up in next ISR/tasklet. */
3783         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3784         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
3785
3786 #ifdef CONFIG_IWLWIFI_DEBUG
3787         if (priv->debug_level & IWL_DL_ISR) {
3788                 /* just for debug */
3789                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3790                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3791                               inta, inta_mask, inta_fh);
3792         }
3793 #endif
3794
3795         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
3796          * atomic, make sure that inta covers all the interrupts that
3797          * we've discovered, even if FH interrupt came in just after
3798          * reading CSR_INT. */
3799         if (inta_fh & CSR49_FH_INT_RX_MASK)
3800                 inta |= CSR_INT_BIT_FH_RX;
3801         if (inta_fh & CSR49_FH_INT_TX_MASK)
3802                 inta |= CSR_INT_BIT_FH_TX;
3803
3804         /* Now service all interrupt bits discovered above. */
3805         if (inta & CSR_INT_BIT_HW_ERR) {
3806                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
3807
3808                 /* Tell the device to stop sending interrupts */
3809                 iwl4965_disable_interrupts(priv);
3810
3811                 iwl4965_irq_handle_error(priv);
3812
3813                 handled |= CSR_INT_BIT_HW_ERR;
3814
3815                 spin_unlock_irqrestore(&priv->lock, flags);
3816
3817                 return;
3818         }
3819
3820 #ifdef CONFIG_IWLWIFI_DEBUG
3821         if (priv->debug_level & (IWL_DL_ISR)) {
3822                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
3823                 if (inta & CSR_INT_BIT_SCD)
3824                         IWL_DEBUG_ISR("Scheduler finished to transmit "
3825                                       "the frame/frames.\n");
3826
3827                 /* Alive notification via Rx interrupt will do the real work */
3828                 if (inta & CSR_INT_BIT_ALIVE)
3829                         IWL_DEBUG_ISR("Alive interrupt\n");
3830         }
3831 #endif
3832         /* Safely ignore these bits for debug checks below */
3833         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
3834
3835         /* HW RF KILL switch toggled */
3836         if (inta & CSR_INT_BIT_RF_KILL) {
3837                 int hw_rf_kill = 0;
3838                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
3839                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
3840                         hw_rf_kill = 1;
3841
3842                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
3843                                 "RF_KILL bit toggled to %s.\n",
3844                                 hw_rf_kill ? "disable radio":"enable radio");
3845
3846                 /* Queue restart only if RF_KILL switch was set to "kill"
3847                  *   when we loaded driver, and is now set to "enable".
3848                  * After we're Alive, RF_KILL gets handled by
3849                  *   iwl4965_rx_card_state_notif() */
3850                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
3851                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
3852                         queue_work(priv->workqueue, &priv->restart);
3853                 }
3854
3855                 handled |= CSR_INT_BIT_RF_KILL;
3856         }
3857
3858         /* Chip got too hot and stopped itself */
3859         if (inta & CSR_INT_BIT_CT_KILL) {
3860                 IWL_ERROR("Microcode CT kill error detected.\n");
3861                 handled |= CSR_INT_BIT_CT_KILL;
3862         }
3863
3864         /* Error detected by uCode */
3865         if (inta & CSR_INT_BIT_SW_ERR) {
3866                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
3867                           inta);
3868                 iwl4965_irq_handle_error(priv);
3869                 handled |= CSR_INT_BIT_SW_ERR;
3870         }
3871
3872         /* uCode wakes up after power-down sleep */
3873         if (inta & CSR_INT_BIT_WAKEUP) {
3874                 IWL_DEBUG_ISR("Wakeup interrupt\n");
3875                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
3876                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
3877                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
3878                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
3879                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
3880                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
3881                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
3882
3883                 handled |= CSR_INT_BIT_WAKEUP;
3884         }
3885
3886         /* All uCode command responses, including Tx command responses,
3887          * Rx "responses" (frame-received notification), and other
3888          * notifications from uCode come through here*/
3889         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
3890                 iwl_rx_handle(priv);
3891                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
3892         }
3893
3894         if (inta & CSR_INT_BIT_FH_TX) {
3895                 IWL_DEBUG_ISR("Tx interrupt\n");
3896                 handled |= CSR_INT_BIT_FH_TX;
3897         }
3898
3899         if (inta & ~handled)
3900                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
3901
3902         if (inta & ~CSR_INI_SET_MASK) {
3903                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
3904                          inta & ~CSR_INI_SET_MASK);
3905                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
3906         }
3907
3908         /* Re-enable all interrupts */
3909         /* only Re-enable if diabled by irq */
3910         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3911                 iwl4965_enable_interrupts(priv);
3912
3913 #ifdef CONFIG_IWLWIFI_DEBUG
3914         if (priv->debug_level & (IWL_DL_ISR)) {
3915                 inta = iwl_read32(priv, CSR_INT);
3916                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3917                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3918                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
3919                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
3920         }
3921 #endif
3922         spin_unlock_irqrestore(&priv->lock, flags);
3923 }
3924
3925 static irqreturn_t iwl4965_isr(int irq, void *data)
3926 {
3927         struct iwl_priv *priv = data;
3928         u32 inta, inta_mask;
3929         u32 inta_fh;
3930         if (!priv)
3931                 return IRQ_NONE;
3932
3933         spin_lock(&priv->lock);
3934
3935         /* Disable (but don't clear!) interrupts here to avoid
3936          *    back-to-back ISRs and sporadic interrupts from our NIC.
3937          * If we have something to service, the tasklet will re-enable ints.
3938          * If we *don't* have something, we'll re-enable before leaving here. */
3939         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
3940         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3941
3942         /* Discover which interrupts are active/pending */
3943         inta = iwl_read32(priv, CSR_INT);
3944         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3945
3946         /* Ignore interrupt if there's nothing in NIC to service.
3947          * This may be due to IRQ shared with another device,
3948          * or due to sporadic interrupts thrown from our NIC. */
3949         if (!inta && !inta_fh) {
3950                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
3951                 goto none;
3952         }
3953
3954         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
3955                 /* Hardware disappeared. It might have already raised
3956                  * an interrupt */
3957                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
3958                 goto unplugged;
3959         }
3960
3961         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3962                       inta, inta_mask, inta_fh);
3963
3964         inta &= ~CSR_INT_BIT_SCD;
3965
3966         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
3967         if (likely(inta || inta_fh))
3968                 tasklet_schedule(&priv->irq_tasklet);
3969
3970  unplugged:
3971         spin_unlock(&priv->lock);
3972         return IRQ_HANDLED;
3973
3974  none:
3975         /* re-enable interrupts here since we don't have anything to service. */
3976         /* only Re-enable if diabled by irq */
3977         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3978                 iwl4965_enable_interrupts(priv);
3979         spin_unlock(&priv->lock);
3980         return IRQ_NONE;
3981 }
3982
3983 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
3984  * sending probe req.  This should be set long enough to hear probe responses
3985  * from more than one AP.  */
3986 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
3987 #define IWL_ACTIVE_DWELL_TIME_52    (10)
3988
3989 /* For faster active scanning, scan will move to the next channel if fewer than
3990  * PLCP_QUIET_THRESH packets are heard on this channel within
3991  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
3992  * time if it's a quiet channel (nothing responded to our probe, and there's
3993  * no other traffic).
3994  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
3995 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
3996 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
3997
3998 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
3999  * Must be set longer than active dwell time.
4000  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4001 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4002 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4003 #define IWL_PASSIVE_DWELL_BASE      (100)
4004 #define IWL_CHANNEL_TUNE_TIME       5
4005
4006 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4007                                                 enum ieee80211_band band)
4008 {
4009         if (band == IEEE80211_BAND_5GHZ)
4010                 return IWL_ACTIVE_DWELL_TIME_52;
4011         else
4012                 return IWL_ACTIVE_DWELL_TIME_24;
4013 }
4014
4015 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4016                                           enum ieee80211_band band)
4017 {
4018         u16 active = iwl4965_get_active_dwell_time(priv, band);
4019         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4020             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4021             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4022
4023         if (iwl_is_associated(priv)) {
4024                 /* If we're associated, we clamp the maximum passive
4025                  * dwell time to be 98% of the beacon interval (minus
4026                  * 2 * channel tune time) */
4027                 passive = priv->beacon_int;
4028                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4029                         passive = IWL_PASSIVE_DWELL_BASE;
4030                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4031         }
4032
4033         if (passive <= active)
4034                 passive = active + 1;
4035
4036         return passive;
4037 }
4038
4039 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4040                                          enum ieee80211_band band,
4041                                      u8 is_active, u8 direct_mask,
4042                                      struct iwl4965_scan_channel *scan_ch)
4043 {
4044         const struct ieee80211_channel *channels = NULL;
4045         const struct ieee80211_supported_band *sband;
4046         const struct iwl_channel_info *ch_info;
4047         u16 passive_dwell = 0;
4048         u16 active_dwell = 0;
4049         int added, i;
4050
4051         sband = iwl_get_hw_mode(priv, band);
4052         if (!sband)
4053                 return 0;
4054
4055         channels = sband->channels;
4056
4057         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4058         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4059
4060         for (i = 0, added = 0; i < sband->n_channels; i++) {
4061                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4062                         continue;
4063
4064                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4065
4066                 ch_info = iwl_get_channel_info(priv, band,
4067                                          scan_ch->channel);
4068                 if (!is_channel_valid(ch_info)) {
4069                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4070                                        scan_ch->channel);
4071                         continue;
4072                 }
4073
4074                 if (!is_active || is_channel_passive(ch_info) ||
4075                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4076                         scan_ch->type = 0;      /* passive */
4077                 else
4078                         scan_ch->type = 1;      /* active */
4079
4080                 if (scan_ch->type & 1)
4081                         scan_ch->type |= (direct_mask << 1);
4082
4083                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4084                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4085
4086                 /* Set txpower levels to defaults */
4087                 scan_ch->tpc.dsp_atten = 110;
4088                 /* scan_pwr_info->tpc.dsp_atten; */
4089
4090                 /*scan_pwr_info->tpc.tx_gain; */
4091                 if (band == IEEE80211_BAND_5GHZ)
4092                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4093                 else {
4094                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4095                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4096                          * power level:
4097                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4098                          */
4099                 }
4100
4101                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4102                                scan_ch->channel,
4103                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4104                                (scan_ch->type & 1) ?
4105                                active_dwell : passive_dwell);
4106
4107                 scan_ch++;
4108                 added++;
4109         }
4110
4111         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4112         return added;
4113 }
4114
4115 /******************************************************************************
4116  *
4117  * uCode download functions
4118  *
4119  ******************************************************************************/
4120
4121 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4122 {
4123         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4124         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4125         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4126         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4127         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4128         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4129 }
4130
4131 static void iwl4965_nic_start(struct iwl_priv *priv)
4132 {
4133         /* Remove all resets to allow NIC to operate */
4134         iwl_write32(priv, CSR_RESET, 0);
4135 }
4136
4137
4138 /**
4139  * iwl4965_read_ucode - Read uCode images from disk file.
4140  *
4141  * Copy into buffers for card to fetch via bus-mastering
4142  */
4143 static int iwl4965_read_ucode(struct iwl_priv *priv)
4144 {
4145         struct iwl4965_ucode *ucode;
4146         int ret;
4147         const struct firmware *ucode_raw;
4148         const char *name = priv->cfg->fw_name;
4149         u8 *src;
4150         size_t len;
4151         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4152
4153         /* Ask kernel firmware_class module to get the boot firmware off disk.
4154          * request_firmware() is synchronous, file is in memory on return. */
4155         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4156         if (ret < 0) {
4157                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4158                                         name, ret);
4159                 goto error;
4160         }
4161
4162         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4163                        name, ucode_raw->size);
4164
4165         /* Make sure that we got at least our header! */
4166         if (ucode_raw->size < sizeof(*ucode)) {
4167                 IWL_ERROR("File size way too small!\n");
4168                 ret = -EINVAL;
4169                 goto err_release;
4170         }
4171
4172         /* Data from ucode file:  header followed by uCode images */
4173         ucode = (void *)ucode_raw->data;
4174
4175         ver = le32_to_cpu(ucode->ver);
4176         inst_size = le32_to_cpu(ucode->inst_size);
4177         data_size = le32_to_cpu(ucode->data_size);
4178         init_size = le32_to_cpu(ucode->init_size);
4179         init_data_size = le32_to_cpu(ucode->init_data_size);
4180         boot_size = le32_to_cpu(ucode->boot_size);
4181
4182         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4183         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4184                        inst_size);
4185         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4186                        data_size);
4187         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4188                        init_size);
4189         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4190                        init_data_size);
4191         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4192                        boot_size);
4193
4194         /* Verify size of file vs. image size info in file's header */
4195         if (ucode_raw->size < sizeof(*ucode) +
4196                 inst_size + data_size + init_size +
4197                 init_data_size + boot_size) {
4198
4199                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4200                                (int)ucode_raw->size);
4201                 ret = -EINVAL;
4202                 goto err_release;
4203         }
4204
4205         /* Verify that uCode images will fit in card's SRAM */
4206         if (inst_size > priv->hw_params.max_inst_size) {
4207                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4208                                inst_size);
4209                 ret = -EINVAL;
4210                 goto err_release;
4211         }
4212
4213         if (data_size > priv->hw_params.max_data_size) {
4214                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4215                                 data_size);
4216                 ret = -EINVAL;
4217                 goto err_release;
4218         }
4219         if (init_size > priv->hw_params.max_inst_size) {
4220                 IWL_DEBUG_INFO
4221                     ("uCode init instr len %d too large to fit in\n",
4222                       init_size);
4223                 ret = -EINVAL;
4224                 goto err_release;
4225         }
4226         if (init_data_size > priv->hw_params.max_data_size) {
4227                 IWL_DEBUG_INFO
4228                     ("uCode init data len %d too large to fit in\n",
4229                       init_data_size);
4230                 ret = -EINVAL;
4231                 goto err_release;
4232         }
4233         if (boot_size > priv->hw_params.max_bsm_size) {
4234                 IWL_DEBUG_INFO
4235                     ("uCode boot instr len %d too large to fit in\n",
4236                       boot_size);
4237                 ret = -EINVAL;
4238                 goto err_release;
4239         }
4240
4241         /* Allocate ucode buffers for card's bus-master loading ... */
4242
4243         /* Runtime instructions and 2 copies of data:
4244          * 1) unmodified from disk
4245          * 2) backup cache for save/restore during power-downs */
4246         priv->ucode_code.len = inst_size;
4247         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4248
4249         priv->ucode_data.len = data_size;
4250         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4251
4252         priv->ucode_data_backup.len = data_size;
4253         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4254
4255         /* Initialization instructions and data */
4256         if (init_size && init_data_size) {
4257                 priv->ucode_init.len = init_size;
4258                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4259
4260                 priv->ucode_init_data.len = init_data_size;
4261                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4262
4263                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4264                         goto err_pci_alloc;
4265         }
4266
4267         /* Bootstrap (instructions only, no data) */
4268         if (boot_size) {
4269                 priv->ucode_boot.len = boot_size;
4270                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4271
4272                 if (!priv->ucode_boot.v_addr)
4273                         goto err_pci_alloc;
4274         }
4275
4276         /* Copy images into buffers for card's bus-master reads ... */
4277
4278         /* Runtime instructions (first block of data in file) */
4279         src = &ucode->data[0];
4280         len = priv->ucode_code.len;
4281         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4282         memcpy(priv->ucode_code.v_addr, src, len);
4283         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4284                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4285
4286         /* Runtime data (2nd block)
4287          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
4288         src = &ucode->data[inst_size];
4289         len = priv->ucode_data.len;
4290         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4291         memcpy(priv->ucode_data.v_addr, src, len);
4292         memcpy(priv->ucode_data_backup.v_addr, src, len);
4293
4294         /* Initialization instructions (3rd block) */
4295         if (init_size) {
4296                 src = &ucode->data[inst_size + data_size];
4297                 len = priv->ucode_init.len;
4298                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4299                                 len);
4300                 memcpy(priv->ucode_init.v_addr, src, len);
4301         }
4302
4303         /* Initialization data (4th block) */
4304         if (init_data_size) {
4305                 src = &ucode->data[inst_size + data_size + init_size];
4306                 len = priv->ucode_init_data.len;
4307                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4308                                len);
4309                 memcpy(priv->ucode_init_data.v_addr, src, len);
4310         }
4311
4312         /* Bootstrap instructions (5th block) */
4313         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4314         len = priv->ucode_boot.len;
4315         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4316         memcpy(priv->ucode_boot.v_addr, src, len);
4317
4318         /* We have our copies now, allow OS release its copies */
4319         release_firmware(ucode_raw);
4320         return 0;
4321
4322  err_pci_alloc:
4323         IWL_ERROR("failed to allocate pci memory\n");
4324         ret = -ENOMEM;
4325         iwl4965_dealloc_ucode_pci(priv);
4326
4327  err_release:
4328         release_firmware(ucode_raw);
4329
4330  error:
4331         return ret;
4332 }
4333
4334
4335 /**
4336  * iwl4965_set_ucode_ptrs - Set uCode address location
4337  *
4338  * Tell initialization uCode where to find runtime uCode.
4339  *
4340  * BSM registers initially contain pointers to initialization uCode.
4341  * We need to replace them to load runtime uCode inst and data,
4342  * and to save runtime data when powering down.
4343  */
4344 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
4345 {
4346         dma_addr_t pinst;
4347         dma_addr_t pdata;
4348         int rc = 0;
4349         unsigned long flags;
4350
4351         /* bits 35:4 for 4965 */
4352         pinst = priv->ucode_code.p_addr >> 4;
4353         pdata = priv->ucode_data_backup.p_addr >> 4;
4354
4355         spin_lock_irqsave(&priv->lock, flags);
4356         rc = iwl_grab_nic_access(priv);
4357         if (rc) {
4358                 spin_unlock_irqrestore(&priv->lock, flags);
4359                 return rc;
4360         }
4361
4362         /* Tell bootstrap uCode where to find image to load */
4363         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4364         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4365         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4366                                  priv->ucode_data.len);
4367
4368         /* Inst bytecount must be last to set up, bit 31 signals uCode
4369          *   that all new ptr/size info is in place */
4370         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4371                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4372
4373         iwl_release_nic_access(priv);
4374
4375         spin_unlock_irqrestore(&priv->lock, flags);
4376
4377         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4378
4379         return rc;
4380 }
4381
4382 /**
4383  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
4384  *
4385  * Called after REPLY_ALIVE notification received from "initialize" uCode.
4386  *
4387  * The 4965 "initialize" ALIVE reply contains calibration data for:
4388  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
4389  *   (3945 does not contain this data).
4390  *
4391  * Tell "initialize" uCode to go ahead and load the runtime uCode.
4392 */
4393 static void iwl4965_init_alive_start(struct iwl_priv *priv)
4394 {
4395         /* Check alive response for "valid" sign from uCode */
4396         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
4397                 /* We had an error bringing up the hardware, so take it
4398                  * all the way back down so we can try again */
4399                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
4400                 goto restart;
4401         }
4402
4403         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
4404          * This is a paranoid check, because we would not have gotten the
4405          * "initialize" alive if code weren't properly loaded.  */
4406         if (iwl_verify_ucode(priv)) {
4407                 /* Runtime instruction load was bad;
4408                  * take it all the way back down so we can try again */
4409                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
4410                 goto restart;
4411         }
4412
4413         /* Calculate temperature */
4414         priv->temperature = iwl4965_get_temperature(priv);
4415
4416         /* Send pointers to protocol/runtime uCode image ... init code will
4417          * load and launch runtime uCode, which will send us another "Alive"
4418          * notification. */
4419         IWL_DEBUG_INFO("Initialization Alive received.\n");
4420         if (iwl4965_set_ucode_ptrs(priv)) {
4421                 /* Runtime instruction load won't happen;
4422                  * take it all the way back down so we can try again */
4423                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
4424                 goto restart;
4425         }
4426         return;
4427
4428  restart:
4429         queue_work(priv->workqueue, &priv->restart);
4430 }
4431
4432
4433 /**
4434  * iwl4965_alive_start - called after REPLY_ALIVE notification received
4435  *                   from protocol/runtime uCode (initialization uCode's
4436  *                   Alive gets handled by iwl4965_init_alive_start()).
4437  */
4438 static void iwl4965_alive_start(struct iwl_priv *priv)
4439 {
4440         int ret = 0;
4441
4442         IWL_DEBUG_INFO("Runtime Alive received.\n");
4443
4444         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
4445                 /* We had an error bringing up the hardware, so take it
4446                  * all the way back down so we can try again */
4447                 IWL_DEBUG_INFO("Alive failed.\n");
4448                 goto restart;
4449         }
4450
4451         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
4452          * This is a paranoid check, because we would not have gotten the
4453          * "runtime" alive if code weren't properly loaded.  */
4454         if (iwl_verify_ucode(priv)) {
4455                 /* Runtime instruction load was bad;
4456                  * take it all the way back down so we can try again */
4457                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
4458                 goto restart;
4459         }
4460
4461         iwlcore_clear_stations_table(priv);
4462
4463         ret = priv->cfg->ops->lib->alive_notify(priv);
4464         if (ret) {
4465                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
4466                             ret);
4467                 goto restart;
4468         }
4469
4470         /* After the ALIVE response, we can send host commands to 4965 uCode */
4471         set_bit(STATUS_ALIVE, &priv->status);
4472
4473         /* Clear out the uCode error bit if it is set */
4474         clear_bit(STATUS_FW_ERROR, &priv->status);
4475
4476         if (iwl_is_rfkill(priv))
4477                 return;
4478
4479         ieee80211_start_queues(priv->hw);
4480
4481         priv->active_rate = priv->rates_mask;
4482         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
4483
4484         if (iwl_is_associated(priv)) {
4485                 struct iwl4965_rxon_cmd *active_rxon =
4486                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
4487
4488                 memcpy(&priv->staging_rxon, &priv->active_rxon,
4489                        sizeof(priv->staging_rxon));
4490                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4491         } else {
4492                 /* Initialize our rx_config data */
4493                 iwl4965_connection_init_rx_config(priv);
4494                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
4495         }
4496
4497         /* Configure Bluetooth device coexistence support */
4498         iwl4965_send_bt_config(priv);
4499
4500         /* Configure the adapter for unassociated operation */
4501         iwl4965_commit_rxon(priv);
4502
4503         /* At this point, the NIC is initialized and operational */
4504         priv->notif_missed_beacons = 0;
4505
4506         iwl4965_rf_kill_ct_config(priv);
4507
4508         iwl_leds_register(priv);
4509
4510         IWL_DEBUG_INFO("ALIVE processing complete.\n");
4511         set_bit(STATUS_READY, &priv->status);
4512         wake_up_interruptible(&priv->wait_command_queue);
4513
4514         if (priv->error_recovering)
4515                 iwl4965_error_recovery(priv);
4516
4517         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
4518         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
4519         return;
4520
4521  restart:
4522         queue_work(priv->workqueue, &priv->restart);
4523 }
4524
4525 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
4526
4527 static void __iwl4965_down(struct iwl_priv *priv)
4528 {
4529         unsigned long flags;
4530         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
4531         struct ieee80211_conf *conf = NULL;
4532
4533         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
4534
4535         conf = ieee80211_get_hw_conf(priv->hw);
4536
4537         if (!exit_pending)
4538                 set_bit(STATUS_EXIT_PENDING, &priv->status);
4539
4540         iwl_leds_unregister(priv);
4541
4542         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
4543
4544         iwlcore_clear_stations_table(priv);
4545
4546         /* Unblock any waiting calls */
4547         wake_up_interruptible_all(&priv->wait_command_queue);
4548
4549         /* Wipe out the EXIT_PENDING status bit if we are not actually
4550          * exiting the module */
4551         if (!exit_pending)
4552                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
4553
4554         /* stop and reset the on-board processor */
4555         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4556
4557         /* tell the device to stop sending interrupts */
4558         spin_lock_irqsave(&priv->lock, flags);
4559         iwl4965_disable_interrupts(priv);
4560         spin_unlock_irqrestore(&priv->lock, flags);
4561         iwl_synchronize_irq(priv);
4562
4563         if (priv->mac80211_registered)
4564                 ieee80211_stop_queues(priv->hw);
4565
4566         /* If we have not previously called iwl4965_init() then
4567          * clear all bits but the RF Kill and SUSPEND bits and return */
4568         if (!iwl_is_init(priv)) {
4569                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4570                                         STATUS_RF_KILL_HW |
4571                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4572                                         STATUS_RF_KILL_SW |
4573                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4574                                         STATUS_GEO_CONFIGURED |
4575                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4576                                         STATUS_IN_SUSPEND;
4577                 goto exit;
4578         }
4579
4580         /* ...otherwise clear out all the status bits but the RF Kill and
4581          * SUSPEND bits and continue taking the NIC down. */
4582         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4583                                 STATUS_RF_KILL_HW |
4584                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4585                                 STATUS_RF_KILL_SW |
4586                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4587                                 STATUS_GEO_CONFIGURED |
4588                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4589                                 STATUS_IN_SUSPEND |
4590                         test_bit(STATUS_FW_ERROR, &priv->status) <<
4591                                 STATUS_FW_ERROR;
4592
4593         spin_lock_irqsave(&priv->lock, flags);
4594         iwl_clear_bit(priv, CSR_GP_CNTRL,
4595                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4596         spin_unlock_irqrestore(&priv->lock, flags);
4597
4598         iwl4965_hw_txq_ctx_stop(priv);
4599         iwl4965_hw_rxq_stop(priv);
4600
4601         spin_lock_irqsave(&priv->lock, flags);
4602         if (!iwl_grab_nic_access(priv)) {
4603                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
4604                                          APMG_CLK_VAL_DMA_CLK_RQT);
4605                 iwl_release_nic_access(priv);
4606         }
4607         spin_unlock_irqrestore(&priv->lock, flags);
4608
4609         udelay(5);
4610
4611         iwl4965_hw_nic_stop_master(priv);
4612         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4613         iwl4965_hw_nic_reset(priv);
4614         priv->cfg->ops->lib->free_shared_mem(priv);
4615
4616  exit:
4617         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
4618
4619         if (priv->ibss_beacon)
4620                 dev_kfree_skb(priv->ibss_beacon);
4621         priv->ibss_beacon = NULL;
4622
4623         /* clear out any free frames */
4624         iwl4965_clear_free_frames(priv);
4625 }
4626
4627 static void iwl4965_down(struct iwl_priv *priv)
4628 {
4629         mutex_lock(&priv->mutex);
4630         __iwl4965_down(priv);
4631         mutex_unlock(&priv->mutex);
4632
4633         iwl4965_cancel_deferred_work(priv);
4634 }
4635
4636 #define MAX_HW_RESTARTS 5
4637
4638 static int __iwl4965_up(struct iwl_priv *priv)
4639 {
4640         int i;
4641         int ret;
4642
4643         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4644                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
4645                 return -EIO;
4646         }
4647
4648         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
4649                 IWL_WARNING("Radio disabled by SW RF kill (module "
4650                             "parameter)\n");
4651                 iwl_rfkill_set_hw_state(priv);
4652                 return -ENODEV;
4653         }
4654
4655         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
4656                 IWL_ERROR("ucode not available for device bringup\n");
4657                 return -EIO;
4658         }
4659
4660         /* If platform's RF_KILL switch is NOT set to KILL */
4661         if (iwl_read32(priv, CSR_GP_CNTRL) &
4662                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
4663                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4664         else {
4665                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4666                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
4667                         iwl_rfkill_set_hw_state(priv);
4668                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
4669                         return -ENODEV;
4670                 }
4671         }
4672
4673         iwl_rfkill_set_hw_state(priv);
4674         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
4675
4676         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
4677         if (ret) {
4678                 IWL_ERROR("Unable to allocate shared memory\n");
4679                 return ret;
4680         }
4681
4682         ret = priv->cfg->ops->lib->hw_nic_init(priv);
4683         if (ret) {
4684                 IWL_ERROR("Unable to init nic\n");
4685                 return ret;
4686         }
4687
4688         /* make sure rfkill handshake bits are cleared */
4689         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4690         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4691                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4692
4693         /* clear (again), then enable host interrupts */
4694         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
4695         iwl4965_enable_interrupts(priv);
4696
4697         /* really make sure rfkill handshake bits are cleared */
4698         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4699         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
4700
4701         /* Copy original ucode data image from disk into backup cache.
4702          * This will be used to initialize the on-board processor's
4703          * data SRAM for a clean start when the runtime program first loads. */
4704         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
4705                priv->ucode_data.len);
4706
4707         /* We return success when we resume from suspend and rf_kill is on. */
4708         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
4709                 return 0;
4710
4711         for (i = 0; i < MAX_HW_RESTARTS; i++) {
4712
4713                 iwlcore_clear_stations_table(priv);
4714
4715                 /* load bootstrap state machine,
4716                  * load bootstrap program into processor's memory,
4717                  * prepare to load the "initialize" uCode */
4718                 ret = priv->cfg->ops->lib->load_ucode(priv);
4719
4720                 if (ret) {
4721                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
4722                         continue;
4723                 }
4724
4725                 /* start card; "initialize" will load runtime ucode */
4726                 iwl4965_nic_start(priv);
4727
4728                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
4729
4730                 return 0;
4731         }
4732
4733         set_bit(STATUS_EXIT_PENDING, &priv->status);
4734         __iwl4965_down(priv);
4735
4736         /* tried to restart and config the device for as long as our
4737          * patience could withstand */
4738         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
4739         return -EIO;
4740 }
4741
4742
4743 /*****************************************************************************
4744  *
4745  * Workqueue callbacks
4746  *
4747  *****************************************************************************/
4748
4749 static void iwl4965_bg_init_alive_start(struct work_struct *data)
4750 {
4751         struct iwl_priv *priv =
4752             container_of(data, struct iwl_priv, init_alive_start.work);
4753
4754         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4755                 return;
4756
4757         mutex_lock(&priv->mutex);
4758         iwl4965_init_alive_start(priv);
4759         mutex_unlock(&priv->mutex);
4760 }
4761
4762 static void iwl4965_bg_alive_start(struct work_struct *data)
4763 {
4764         struct iwl_priv *priv =
4765             container_of(data, struct iwl_priv, alive_start.work);
4766
4767         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4768                 return;
4769
4770         mutex_lock(&priv->mutex);
4771         iwl4965_alive_start(priv);
4772         mutex_unlock(&priv->mutex);
4773 }
4774
4775 static void iwl4965_bg_rf_kill(struct work_struct *work)
4776 {
4777         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
4778
4779         wake_up_interruptible(&priv->wait_command_queue);
4780
4781         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4782                 return;
4783
4784         mutex_lock(&priv->mutex);
4785
4786         if (!iwl_is_rfkill(priv)) {
4787                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
4788                           "HW and/or SW RF Kill no longer active, restarting "
4789                           "device\n");
4790                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
4791                         queue_work(priv->workqueue, &priv->restart);
4792         } else {
4793                 /* make sure mac80211 stop sending Tx frame */
4794                 if (priv->mac80211_registered)
4795                         ieee80211_stop_queues(priv->hw);
4796
4797                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
4798                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
4799                                           "disabled by SW switch\n");
4800                 else
4801                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
4802                                     "Kill switch must be turned off for "
4803                                     "wireless networking to work.\n");
4804         }
4805         iwl_rfkill_set_hw_state(priv);
4806
4807         mutex_unlock(&priv->mutex);
4808 }
4809
4810 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
4811
4812 static void iwl4965_bg_scan_check(struct work_struct *data)
4813 {
4814         struct iwl_priv *priv =
4815             container_of(data, struct iwl_priv, scan_check.work);
4816
4817         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4818                 return;
4819
4820         mutex_lock(&priv->mutex);
4821         if (test_bit(STATUS_SCANNING, &priv->status) ||
4822             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4823                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
4824                           "Scan completion watchdog resetting adapter (%dms)\n",
4825                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
4826
4827                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
4828                         iwl4965_send_scan_abort(priv);
4829         }
4830         mutex_unlock(&priv->mutex);
4831 }
4832
4833 static void iwl4965_bg_request_scan(struct work_struct *data)
4834 {
4835         struct iwl_priv *priv =
4836             container_of(data, struct iwl_priv, request_scan);
4837         struct iwl_host_cmd cmd = {
4838                 .id = REPLY_SCAN_CMD,
4839                 .len = sizeof(struct iwl4965_scan_cmd),
4840                 .meta.flags = CMD_SIZE_HUGE,
4841         };
4842         struct iwl4965_scan_cmd *scan;
4843         struct ieee80211_conf *conf = NULL;
4844         u16 cmd_len;
4845         enum ieee80211_band band;
4846         u8 direct_mask;
4847         int ret = 0;
4848
4849         conf = ieee80211_get_hw_conf(priv->hw);
4850
4851         mutex_lock(&priv->mutex);
4852
4853         if (!iwl_is_ready(priv)) {
4854                 IWL_WARNING("request scan called when driver not ready.\n");
4855                 goto done;
4856         }
4857
4858         /* Make sure the scan wasn't cancelled before this queued work
4859          * was given the chance to run... */
4860         if (!test_bit(STATUS_SCANNING, &priv->status))
4861                 goto done;
4862
4863         /* This should never be called or scheduled if there is currently
4864          * a scan active in the hardware. */
4865         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
4866                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
4867                                "Ignoring second request.\n");
4868                 ret = -EIO;
4869                 goto done;
4870         }
4871
4872         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4873                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
4874                 goto done;
4875         }
4876
4877         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4878                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
4879                 goto done;
4880         }
4881
4882         if (iwl_is_rfkill(priv)) {
4883                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
4884                 goto done;
4885         }
4886
4887         if (!test_bit(STATUS_READY, &priv->status)) {
4888                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
4889                 goto done;
4890         }
4891
4892         if (!priv->scan_bands) {
4893                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
4894                 goto done;
4895         }
4896
4897         if (!priv->scan) {
4898                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
4899                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
4900                 if (!priv->scan) {
4901                         ret = -ENOMEM;
4902                         goto done;
4903                 }
4904         }
4905         scan = priv->scan;
4906         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
4907
4908         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
4909         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
4910
4911         if (iwl_is_associated(priv)) {
4912                 u16 interval = 0;
4913                 u32 extra;
4914                 u32 suspend_time = 100;
4915                 u32 scan_suspend_time = 100;
4916                 unsigned long flags;
4917
4918                 IWL_DEBUG_INFO("Scanning while associated...\n");
4919
4920                 spin_lock_irqsave(&priv->lock, flags);
4921                 interval = priv->beacon_int;
4922                 spin_unlock_irqrestore(&priv->lock, flags);
4923
4924                 scan->suspend_time = 0;
4925                 scan->max_out_time = cpu_to_le32(200 * 1024);
4926                 if (!interval)
4927                         interval = suspend_time;
4928
4929                 extra = (suspend_time / interval) << 22;
4930                 scan_suspend_time = (extra |
4931                     ((suspend_time % interval) * 1024));
4932                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
4933                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
4934                                scan_suspend_time, interval);
4935         }
4936
4937         /* We should add the ability for user to lock to PASSIVE ONLY */
4938         if (priv->one_direct_scan) {
4939                 IWL_DEBUG_SCAN
4940                     ("Kicking off one direct scan for '%s'\n",
4941                      iwl4965_escape_essid(priv->direct_ssid,
4942                                       priv->direct_ssid_len));
4943                 scan->direct_scan[0].id = WLAN_EID_SSID;
4944                 scan->direct_scan[0].len = priv->direct_ssid_len;
4945                 memcpy(scan->direct_scan[0].ssid,
4946                        priv->direct_ssid, priv->direct_ssid_len);
4947                 direct_mask = 1;
4948         } else if (!iwl_is_associated(priv) && priv->essid_len) {
4949                 IWL_DEBUG_SCAN
4950                   ("Kicking off one direct scan for '%s' when not associated\n",
4951                    iwl4965_escape_essid(priv->essid, priv->essid_len));
4952                 scan->direct_scan[0].id = WLAN_EID_SSID;
4953                 scan->direct_scan[0].len = priv->essid_len;
4954                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
4955                 direct_mask = 1;
4956         } else {
4957                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
4958                 direct_mask = 0;
4959         }
4960
4961         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
4962         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
4963         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
4964
4965
4966         switch (priv->scan_bands) {
4967         case 2:
4968                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
4969                 scan->tx_cmd.rate_n_flags =
4970                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
4971                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
4972
4973                 scan->good_CRC_th = 0;
4974                 band = IEEE80211_BAND_2GHZ;
4975                 break;
4976
4977         case 1:
4978                 scan->tx_cmd.rate_n_flags =
4979                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
4980                                 RATE_MCS_ANT_B_MSK);
4981                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
4982                 band = IEEE80211_BAND_5GHZ;
4983                 break;
4984
4985         default:
4986                 IWL_WARNING("Invalid scan band count\n");
4987                 goto done;
4988         }
4989
4990         /* We don't build a direct scan probe request; the uCode will do
4991          * that based on the direct_mask added to each channel entry */
4992         cmd_len = iwl4965_fill_probe_req(priv, band,
4993                                         (struct ieee80211_mgmt *)scan->data,
4994                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
4995
4996         scan->tx_cmd.len = cpu_to_le16(cmd_len);
4997         /* select Rx chains */
4998
4999         /* Force use of chains B and C (0x6) for scan Rx.
5000          * Avoid A (0x1) because of its off-channel reception on A-band.
5001          * MIMO is not used here, but value is required to make uCode happy. */
5002         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5003                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5004                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5005                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5006
5007         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5008                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5009
5010         if (direct_mask)
5011                 scan->channel_count =
5012                         iwl4965_get_channels_for_scan(
5013                                 priv, band, 1, /* active */
5014                                 direct_mask,
5015                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5016         else
5017                 scan->channel_count =
5018                         iwl4965_get_channels_for_scan(
5019                                 priv, band, 0, /* passive */
5020                                 direct_mask,
5021                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5022
5023         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5024                                RXON_FILTER_BCON_AWARE_MSK);
5025         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5026             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5027         cmd.data = scan;
5028         scan->len = cpu_to_le16(cmd.len);
5029
5030         set_bit(STATUS_SCAN_HW, &priv->status);
5031         ret = iwl_send_cmd_sync(priv, &cmd);
5032         if (ret)
5033                 goto done;
5034
5035         queue_delayed_work(priv->workqueue, &priv->scan_check,
5036                            IWL_SCAN_CHECK_WATCHDOG);
5037
5038         mutex_unlock(&priv->mutex);
5039         return;
5040
5041  done:
5042         /* inform mac80211 scan aborted */
5043         queue_work(priv->workqueue, &priv->scan_completed);
5044         mutex_unlock(&priv->mutex);
5045 }
5046
5047 static void iwl4965_bg_up(struct work_struct *data)
5048 {
5049         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5050
5051         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5052                 return;
5053
5054         mutex_lock(&priv->mutex);
5055         __iwl4965_up(priv);
5056         mutex_unlock(&priv->mutex);
5057 }
5058
5059 static void iwl4965_bg_restart(struct work_struct *data)
5060 {
5061         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5062
5063         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5064                 return;
5065
5066         iwl4965_down(priv);
5067         queue_work(priv->workqueue, &priv->up);
5068 }
5069
5070 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5071 {
5072         struct iwl_priv *priv =
5073             container_of(data, struct iwl_priv, rx_replenish);
5074
5075         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5076                 return;
5077
5078         mutex_lock(&priv->mutex);
5079         iwl_rx_replenish(priv);
5080         mutex_unlock(&priv->mutex);
5081 }
5082
5083 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5084
5085 static void iwl4965_post_associate(struct iwl_priv *priv)
5086 {
5087         struct ieee80211_conf *conf = NULL;
5088         int ret = 0;
5089         DECLARE_MAC_BUF(mac);
5090
5091         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5092                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5093                 return;
5094         }
5095
5096         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5097                         priv->assoc_id,
5098                         print_mac(mac, priv->active_rxon.bssid_addr));
5099
5100
5101         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5102                 return;
5103
5104
5105         if (!priv->vif || !priv->is_open)
5106                 return;
5107
5108         iwl4965_scan_cancel_timeout(priv, 200);
5109
5110         conf = ieee80211_get_hw_conf(priv->hw);
5111
5112         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5113         iwl4965_commit_rxon(priv);
5114
5115         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5116         iwl4965_setup_rxon_timing(priv);
5117         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5118                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5119         if (ret)
5120                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5121                             "Attempting to continue.\n");
5122
5123         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5124
5125 #ifdef CONFIG_IWL4965_HT
5126         if (priv->current_ht_config.is_ht)
5127                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5128 #endif /* CONFIG_IWL4965_HT*/
5129         iwl_set_rxon_chain(priv);
5130         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5131
5132         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5133                         priv->assoc_id, priv->beacon_int);
5134
5135         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5136                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5137         else
5138                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5139
5140         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5141                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5142                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5143                 else
5144                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5145
5146                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5147                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5148
5149         }
5150
5151         iwl4965_commit_rxon(priv);
5152
5153         switch (priv->iw_mode) {
5154         case IEEE80211_IF_TYPE_STA:
5155                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5156                 break;
5157
5158         case IEEE80211_IF_TYPE_IBSS:
5159
5160                 /* clear out the station table */
5161                 iwlcore_clear_stations_table(priv);
5162
5163                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5164                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5165                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5166                 iwl4965_send_beacon_cmd(priv);
5167
5168                 break;
5169
5170         default:
5171                 IWL_ERROR("%s Should not be called in %d mode\n",
5172                                 __FUNCTION__, priv->iw_mode);
5173                 break;
5174         }
5175
5176         iwl4965_sequence_reset(priv);
5177
5178         /* Enable Rx differential gain and sensitivity calibrations */
5179         iwl_chain_noise_reset(priv);
5180         priv->start_calib = 1;
5181
5182         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5183                 priv->assoc_station_added = 1;
5184
5185         iwl4965_activate_qos(priv, 0);
5186
5187         iwl_power_update_mode(priv, 0);
5188         /* we have just associated, don't start scan too early */
5189         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5190 }
5191
5192
5193 static void iwl4965_bg_post_associate(struct work_struct *data)
5194 {
5195         struct iwl_priv *priv = container_of(data, struct iwl_priv,
5196                                              post_associate.work);
5197
5198         mutex_lock(&priv->mutex);
5199         iwl4965_post_associate(priv);
5200         mutex_unlock(&priv->mutex);
5201
5202 }
5203
5204 static void iwl4965_bg_abort_scan(struct work_struct *work)
5205 {
5206         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5207
5208         if (!iwl_is_ready(priv))
5209                 return;
5210
5211         mutex_lock(&priv->mutex);
5212
5213         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5214         iwl4965_send_scan_abort(priv);
5215
5216         mutex_unlock(&priv->mutex);
5217 }
5218
5219 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5220
5221 static void iwl4965_bg_scan_completed(struct work_struct *work)
5222 {
5223         struct iwl_priv *priv =
5224             container_of(work, struct iwl_priv, scan_completed);
5225
5226         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5227
5228         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5229                 return;
5230
5231         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5232                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5233
5234         ieee80211_scan_completed(priv->hw);
5235
5236         /* Since setting the TXPOWER may have been deferred while
5237          * performing the scan, fire one off */
5238         mutex_lock(&priv->mutex);
5239         iwl4965_hw_reg_send_txpower(priv);
5240         mutex_unlock(&priv->mutex);
5241 }
5242
5243 /*****************************************************************************
5244  *
5245  * mac80211 entry point functions
5246  *
5247  *****************************************************************************/
5248
5249 #define UCODE_READY_TIMEOUT     (2 * HZ)
5250
5251 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5252 {
5253         struct iwl_priv *priv = hw->priv;
5254         int ret;
5255
5256         IWL_DEBUG_MAC80211("enter\n");
5257
5258         if (pci_enable_device(priv->pci_dev)) {
5259                 IWL_ERROR("Fail to pci_enable_device\n");
5260                 return -ENODEV;
5261         }
5262         pci_restore_state(priv->pci_dev);
5263         pci_enable_msi(priv->pci_dev);
5264
5265         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5266                           DRV_NAME, priv);
5267         if (ret) {
5268                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5269                 goto out_disable_msi;
5270         }
5271
5272         /* we should be verifying the device is ready to be opened */
5273         mutex_lock(&priv->mutex);
5274
5275         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5276         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5277          * ucode filename and max sizes are card-specific. */
5278
5279         if (!priv->ucode_code.len) {
5280                 ret = iwl4965_read_ucode(priv);
5281                 if (ret) {
5282                         IWL_ERROR("Could not read microcode: %d\n", ret);
5283                         mutex_unlock(&priv->mutex);
5284                         goto out_release_irq;
5285                 }
5286         }
5287
5288         ret = __iwl4965_up(priv);
5289
5290         mutex_unlock(&priv->mutex);
5291
5292         if (ret)
5293                 goto out_release_irq;
5294
5295         IWL_DEBUG_INFO("Start UP work done.\n");
5296
5297         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5298                 return 0;
5299
5300         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5301          * mac80211 will not be run successfully. */
5302         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5303                         test_bit(STATUS_READY, &priv->status),
5304                         UCODE_READY_TIMEOUT);
5305         if (!ret) {
5306                 if (!test_bit(STATUS_READY, &priv->status)) {
5307                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5308                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
5309                         ret = -ETIMEDOUT;
5310                         goto out_release_irq;
5311                 }
5312         }
5313
5314         priv->is_open = 1;
5315         IWL_DEBUG_MAC80211("leave\n");
5316         return 0;
5317
5318 out_release_irq:
5319         free_irq(priv->pci_dev->irq, priv);
5320 out_disable_msi:
5321         pci_disable_msi(priv->pci_dev);
5322         pci_disable_device(priv->pci_dev);
5323         priv->is_open = 0;
5324         IWL_DEBUG_MAC80211("leave - failed\n");
5325         return ret;
5326 }
5327
5328 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
5329 {
5330         struct iwl_priv *priv = hw->priv;
5331
5332         IWL_DEBUG_MAC80211("enter\n");
5333
5334         if (!priv->is_open) {
5335                 IWL_DEBUG_MAC80211("leave - skip\n");
5336                 return;
5337         }
5338
5339         priv->is_open = 0;
5340
5341         if (iwl_is_ready_rf(priv)) {
5342                 /* stop mac, cancel any scan request and clear
5343                  * RXON_FILTER_ASSOC_MSK BIT
5344                  */
5345                 mutex_lock(&priv->mutex);
5346                 iwl4965_scan_cancel_timeout(priv, 100);
5347                 cancel_delayed_work(&priv->post_associate);
5348                 mutex_unlock(&priv->mutex);
5349         }
5350
5351         iwl4965_down(priv);
5352
5353         flush_workqueue(priv->workqueue);
5354         free_irq(priv->pci_dev->irq, priv);
5355         pci_disable_msi(priv->pci_dev);
5356         pci_save_state(priv->pci_dev);
5357         pci_disable_device(priv->pci_dev);
5358
5359         IWL_DEBUG_MAC80211("leave\n");
5360 }
5361
5362 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
5363                       struct ieee80211_tx_control *ctl)
5364 {
5365         struct iwl_priv *priv = hw->priv;
5366
5367         IWL_DEBUG_MAC80211("enter\n");
5368
5369         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
5370                 IWL_DEBUG_MAC80211("leave - monitor\n");
5371                 return -1;
5372         }
5373
5374         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5375                      ctl->tx_rate->bitrate);
5376
5377         if (iwl4965_tx_skb(priv, skb, ctl))
5378                 dev_kfree_skb_any(skb);
5379
5380         IWL_DEBUG_MAC80211("leave\n");
5381         return 0;
5382 }
5383
5384 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
5385                                  struct ieee80211_if_init_conf *conf)
5386 {
5387         struct iwl_priv *priv = hw->priv;
5388         unsigned long flags;
5389         DECLARE_MAC_BUF(mac);
5390
5391         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5392
5393         if (priv->vif) {
5394                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5395                 return -EOPNOTSUPP;
5396         }
5397
5398         spin_lock_irqsave(&priv->lock, flags);
5399         priv->vif = conf->vif;
5400
5401         spin_unlock_irqrestore(&priv->lock, flags);
5402
5403         mutex_lock(&priv->mutex);
5404
5405         if (conf->mac_addr) {
5406                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
5407                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
5408         }
5409
5410         if (iwl_is_ready(priv))
5411                 iwl4965_set_mode(priv, conf->type);
5412
5413         mutex_unlock(&priv->mutex);
5414
5415         IWL_DEBUG_MAC80211("leave\n");
5416         return 0;
5417 }
5418
5419 /**
5420  * iwl4965_mac_config - mac80211 config callback
5421  *
5422  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
5423  * be set inappropriately and the driver currently sets the hardware up to
5424  * use it whenever needed.
5425  */
5426 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
5427 {
5428         struct iwl_priv *priv = hw->priv;
5429         const struct iwl_channel_info *ch_info;
5430         unsigned long flags;
5431         int ret = 0;
5432
5433         mutex_lock(&priv->mutex);
5434         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
5435
5436         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
5437
5438         if (!iwl_is_ready(priv)) {
5439                 IWL_DEBUG_MAC80211("leave - not ready\n");
5440                 ret = -EIO;
5441                 goto out;
5442         }
5443
5444         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
5445                      test_bit(STATUS_SCANNING, &priv->status))) {
5446                 IWL_DEBUG_MAC80211("leave - scanning\n");
5447                 set_bit(STATUS_CONF_PENDING, &priv->status);
5448                 mutex_unlock(&priv->mutex);
5449                 return 0;
5450         }
5451
5452         spin_lock_irqsave(&priv->lock, flags);
5453
5454         ch_info = iwl_get_channel_info(priv, conf->channel->band,
5455                         ieee80211_frequency_to_channel(conf->channel->center_freq));
5456         if (!is_channel_valid(ch_info)) {
5457                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
5458                 spin_unlock_irqrestore(&priv->lock, flags);
5459                 ret = -EINVAL;
5460                 goto out;
5461         }
5462
5463 #ifdef CONFIG_IWL4965_HT
5464         /* if we are switching from ht to 2.4 clear flags
5465          * from any ht related info since 2.4 does not
5466          * support ht */
5467         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
5468 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5469             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
5470 #endif
5471         )
5472                 priv->staging_rxon.flags = 0;
5473 #endif /* CONFIG_IWL4965_HT */
5474
5475         iwl_set_rxon_channel(priv, conf->channel->band,
5476                 ieee80211_frequency_to_channel(conf->channel->center_freq));
5477
5478         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
5479
5480         /* The list of supported rates and rate mask can be different
5481          * for each band; since the band may have changed, reset
5482          * the rate mask to what mac80211 lists */
5483         iwl4965_set_rate(priv);
5484
5485         spin_unlock_irqrestore(&priv->lock, flags);
5486
5487 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5488         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
5489                 iwl4965_hw_channel_switch(priv, conf->channel);
5490                 goto out;
5491         }
5492 #endif
5493
5494         if (priv->cfg->ops->lib->radio_kill_sw)
5495                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
5496
5497         if (!conf->radio_enabled) {
5498                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
5499                 goto out;
5500         }
5501
5502         if (iwl_is_rfkill(priv)) {
5503                 IWL_DEBUG_MAC80211("leave - RF kill\n");
5504                 ret = -EIO;
5505                 goto out;
5506         }
5507
5508         iwl4965_set_rate(priv);
5509
5510         if (memcmp(&priv->active_rxon,
5511                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
5512                 iwl4965_commit_rxon(priv);
5513         else
5514                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
5515
5516         IWL_DEBUG_MAC80211("leave\n");
5517
5518 out:
5519         clear_bit(STATUS_CONF_PENDING, &priv->status);
5520         mutex_unlock(&priv->mutex);
5521         return ret;
5522 }
5523
5524 static void iwl4965_config_ap(struct iwl_priv *priv)
5525 {
5526         int ret = 0;
5527
5528         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5529                 return;
5530
5531         /* The following should be done only at AP bring up */
5532         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
5533
5534                 /* RXON - unassoc (to set timing command) */
5535                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5536                 iwl4965_commit_rxon(priv);
5537
5538                 /* RXON Timing */
5539                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5540                 iwl4965_setup_rxon_timing(priv);
5541                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5542                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
5543                 if (ret)
5544                         IWL_WARNING("REPLY_RXON_TIMING failed - "
5545                                         "Attempting to continue.\n");
5546
5547                 iwl_set_rxon_chain(priv);
5548
5549                 /* FIXME: what should be the assoc_id for AP? */
5550                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5551                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5552                         priv->staging_rxon.flags |=
5553                                 RXON_FLG_SHORT_PREAMBLE_MSK;
5554                 else
5555                         priv->staging_rxon.flags &=
5556                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
5557
5558                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5559                         if (priv->assoc_capability &
5560                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
5561                                 priv->staging_rxon.flags |=
5562                                         RXON_FLG_SHORT_SLOT_MSK;
5563                         else
5564                                 priv->staging_rxon.flags &=
5565                                         ~RXON_FLG_SHORT_SLOT_MSK;
5566
5567                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5568                                 priv->staging_rxon.flags &=
5569                                         ~RXON_FLG_SHORT_SLOT_MSK;
5570                 }
5571                 /* restore RXON assoc */
5572                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5573                 iwl4965_commit_rxon(priv);
5574                 iwl4965_activate_qos(priv, 1);
5575                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5576         }
5577         iwl4965_send_beacon_cmd(priv);
5578
5579         /* FIXME - we need to add code here to detect a totally new
5580          * configuration, reset the AP, unassoc, rxon timing, assoc,
5581          * clear sta table, add BCAST sta... */
5582 }
5583
5584 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
5585                                         struct ieee80211_vif *vif,
5586                                     struct ieee80211_if_conf *conf)
5587 {
5588         struct iwl_priv *priv = hw->priv;
5589         DECLARE_MAC_BUF(mac);
5590         unsigned long flags;
5591         int rc;
5592
5593         if (conf == NULL)
5594                 return -EIO;
5595
5596         if (priv->vif != vif) {
5597                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
5598                 return 0;
5599         }
5600
5601         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
5602             (!conf->beacon || !conf->ssid_len)) {
5603                 IWL_DEBUG_MAC80211
5604                     ("Leaving in AP mode because HostAPD is not ready.\n");
5605                 return 0;
5606         }
5607
5608         if (!iwl_is_alive(priv))
5609                 return -EAGAIN;
5610
5611         mutex_lock(&priv->mutex);
5612
5613         if (conf->bssid)
5614                 IWL_DEBUG_MAC80211("bssid: %s\n",
5615                                    print_mac(mac, conf->bssid));
5616
5617 /*
5618  * very dubious code was here; the probe filtering flag is never set:
5619  *
5620         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
5621             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
5622  */
5623
5624         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5625                 if (!conf->bssid) {
5626                         conf->bssid = priv->mac_addr;
5627                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
5628                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
5629                                            print_mac(mac, conf->bssid));
5630                 }
5631                 if (priv->ibss_beacon)
5632                         dev_kfree_skb(priv->ibss_beacon);
5633
5634                 priv->ibss_beacon = conf->beacon;
5635         }
5636
5637         if (iwl_is_rfkill(priv))
5638                 goto done;
5639
5640         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
5641             !is_multicast_ether_addr(conf->bssid)) {
5642                 /* If there is currently a HW scan going on in the background
5643                  * then we need to cancel it else the RXON below will fail. */
5644                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
5645                         IWL_WARNING("Aborted scan still in progress "
5646                                     "after 100ms\n");
5647                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
5648                         mutex_unlock(&priv->mutex);
5649                         return -EAGAIN;
5650                 }
5651                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
5652
5653                 /* TODO: Audit driver for usage of these members and see
5654                  * if mac80211 deprecates them (priv->bssid looks like it
5655                  * shouldn't be there, but I haven't scanned the IBSS code
5656                  * to verify) - jpk */
5657                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
5658
5659                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
5660                         iwl4965_config_ap(priv);
5661                 else {
5662                         rc = iwl4965_commit_rxon(priv);
5663                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
5664                                 iwl4965_rxon_add_station(
5665                                         priv, priv->active_rxon.bssid_addr, 1);
5666                 }
5667
5668         } else {
5669                 iwl4965_scan_cancel_timeout(priv, 100);
5670                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5671                 iwl4965_commit_rxon(priv);
5672         }
5673
5674  done:
5675         spin_lock_irqsave(&priv->lock, flags);
5676         if (!conf->ssid_len)
5677                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
5678         else
5679                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
5680
5681         priv->essid_len = conf->ssid_len;
5682         spin_unlock_irqrestore(&priv->lock, flags);
5683
5684         IWL_DEBUG_MAC80211("leave\n");
5685         mutex_unlock(&priv->mutex);
5686
5687         return 0;
5688 }
5689
5690 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
5691                                  unsigned int changed_flags,
5692                                  unsigned int *total_flags,
5693                                  int mc_count, struct dev_addr_list *mc_list)
5694 {
5695         /*
5696          * XXX: dummy
5697          * see also iwl4965_connection_init_rx_config
5698          */
5699         *total_flags = 0;
5700 }
5701
5702 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
5703                                      struct ieee80211_if_init_conf *conf)
5704 {
5705         struct iwl_priv *priv = hw->priv;
5706
5707         IWL_DEBUG_MAC80211("enter\n");
5708
5709         mutex_lock(&priv->mutex);
5710
5711         if (iwl_is_ready_rf(priv)) {
5712                 iwl4965_scan_cancel_timeout(priv, 100);
5713                 cancel_delayed_work(&priv->post_associate);
5714                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5715                 iwl4965_commit_rxon(priv);
5716         }
5717         if (priv->vif == conf->vif) {
5718                 priv->vif = NULL;
5719                 memset(priv->bssid, 0, ETH_ALEN);
5720                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
5721                 priv->essid_len = 0;
5722         }
5723         mutex_unlock(&priv->mutex);
5724
5725         IWL_DEBUG_MAC80211("leave\n");
5726
5727 }
5728
5729 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
5730 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
5731                                      struct ieee80211_vif *vif,
5732                                      struct ieee80211_bss_conf *bss_conf,
5733                                      u32 changes)
5734 {
5735         struct iwl_priv *priv = hw->priv;
5736
5737         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
5738
5739         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5740                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
5741                                    bss_conf->use_short_preamble);
5742                 if (bss_conf->use_short_preamble)
5743                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5744                 else
5745                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5746         }
5747
5748         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5749                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5750                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
5751                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
5752                 else
5753                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5754         }
5755
5756         if (changes & BSS_CHANGED_HT) {
5757                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
5758                 iwl4965_ht_conf(priv, bss_conf);
5759                 iwl_set_rxon_chain(priv);
5760         }
5761
5762         if (changes & BSS_CHANGED_ASSOC) {
5763                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
5764                 /* This should never happen as this function should
5765                  * never be called from interrupt context. */
5766                 if (WARN_ON_ONCE(in_interrupt()))
5767                         return;
5768                 if (bss_conf->assoc) {
5769                         priv->assoc_id = bss_conf->aid;
5770                         priv->beacon_int = bss_conf->beacon_int;
5771                         priv->timestamp = bss_conf->timestamp;
5772                         priv->assoc_capability = bss_conf->assoc_capability;
5773                         priv->next_scan_jiffies = jiffies +
5774                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
5775                         mutex_lock(&priv->mutex);
5776                         iwl4965_post_associate(priv);
5777                         mutex_unlock(&priv->mutex);
5778                 } else {
5779                         priv->assoc_id = 0;
5780                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
5781                 }
5782         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
5783                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
5784                         iwl_send_rxon_assoc(priv);
5785         }
5786
5787 }
5788
5789 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
5790 {
5791         int rc = 0;
5792         unsigned long flags;
5793         struct iwl_priv *priv = hw->priv;
5794
5795         IWL_DEBUG_MAC80211("enter\n");
5796
5797         mutex_lock(&priv->mutex);
5798         spin_lock_irqsave(&priv->lock, flags);
5799
5800         if (!iwl_is_ready_rf(priv)) {
5801                 rc = -EIO;
5802                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
5803                 goto out_unlock;
5804         }
5805
5806         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
5807                 rc = -EIO;
5808                 IWL_ERROR("ERROR: APs don't scan\n");
5809                 goto out_unlock;
5810         }
5811
5812         /* we don't schedule scan within next_scan_jiffies period */
5813         if (priv->next_scan_jiffies &&
5814                         time_after(priv->next_scan_jiffies, jiffies)) {
5815                 rc = -EAGAIN;
5816                 goto out_unlock;
5817         }
5818         /* if we just finished scan ask for delay */
5819         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
5820                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
5821                 rc = -EAGAIN;
5822                 goto out_unlock;
5823         }
5824         if (len) {
5825                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
5826                                iwl4965_escape_essid(ssid, len), (int)len);
5827
5828                 priv->one_direct_scan = 1;
5829                 priv->direct_ssid_len = (u8)
5830                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
5831                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
5832         } else
5833                 priv->one_direct_scan = 0;
5834
5835         rc = iwl4965_scan_initiate(priv);
5836
5837         IWL_DEBUG_MAC80211("leave\n");
5838
5839 out_unlock:
5840         spin_unlock_irqrestore(&priv->lock, flags);
5841         mutex_unlock(&priv->mutex);
5842
5843         return rc;
5844 }
5845
5846 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
5847                         struct ieee80211_key_conf *keyconf, const u8 *addr,
5848                         u32 iv32, u16 *phase1key)
5849 {
5850         struct iwl_priv *priv = hw->priv;
5851         u8 sta_id = IWL_INVALID_STATION;
5852         unsigned long flags;
5853         __le16 key_flags = 0;
5854         int i;
5855         DECLARE_MAC_BUF(mac);
5856
5857         IWL_DEBUG_MAC80211("enter\n");
5858
5859         sta_id = iwl_find_station(priv, addr);
5860         if (sta_id == IWL_INVALID_STATION) {
5861                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
5862                                    print_mac(mac, addr));
5863                 return;
5864         }
5865
5866         iwl4965_scan_cancel_timeout(priv, 100);
5867
5868         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
5869         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
5870         key_flags &= ~STA_KEY_FLG_INVALID;
5871
5872         if (sta_id == priv->hw_params.bcast_sta_id)
5873                 key_flags |= STA_KEY_MULTICAST_MSK;
5874
5875         spin_lock_irqsave(&priv->sta_lock, flags);
5876
5877         priv->stations[sta_id].sta.key.key_flags = key_flags;
5878         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
5879
5880         for (i = 0; i < 5; i++)
5881                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
5882                         cpu_to_le16(phase1key[i]);
5883
5884         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
5885         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
5886
5887         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
5888
5889         spin_unlock_irqrestore(&priv->sta_lock, flags);
5890
5891         IWL_DEBUG_MAC80211("leave\n");
5892 }
5893
5894 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5895                            const u8 *local_addr, const u8 *addr,
5896                            struct ieee80211_key_conf *key)
5897 {
5898         struct iwl_priv *priv = hw->priv;
5899         DECLARE_MAC_BUF(mac);
5900         int ret = 0;
5901         u8 sta_id = IWL_INVALID_STATION;
5902         u8 is_default_wep_key = 0;
5903
5904         IWL_DEBUG_MAC80211("enter\n");
5905
5906         if (priv->hw_params.sw_crypto) {
5907                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
5908                 return -EOPNOTSUPP;
5909         }
5910
5911         if (is_zero_ether_addr(addr))
5912                 /* only support pairwise keys */
5913                 return -EOPNOTSUPP;
5914
5915         sta_id = iwl_find_station(priv, addr);
5916         if (sta_id == IWL_INVALID_STATION) {
5917                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
5918                                    print_mac(mac, addr));
5919                 return -EINVAL;
5920
5921         }
5922
5923         mutex_lock(&priv->mutex);
5924         iwl4965_scan_cancel_timeout(priv, 100);
5925         mutex_unlock(&priv->mutex);
5926
5927         /* If we are getting WEP group key and we didn't receive any key mapping
5928          * so far, we are in legacy wep mode (group key only), otherwise we are
5929          * in 1X mode.
5930          * In legacy wep mode, we use another host command to the uCode */
5931         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
5932                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
5933                 if (cmd == SET_KEY)
5934                         is_default_wep_key = !priv->key_mapping_key;
5935                 else
5936                         is_default_wep_key = priv->default_wep_key;
5937         }
5938
5939         switch (cmd) {
5940         case SET_KEY:
5941                 if (is_default_wep_key)
5942                         ret = iwl_set_default_wep_key(priv, key);
5943                 else
5944                         ret = iwl_set_dynamic_key(priv, key, sta_id);
5945
5946                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
5947                 break;
5948         case DISABLE_KEY:
5949                 if (is_default_wep_key)
5950                         ret = iwl_remove_default_wep_key(priv, key);
5951                 else
5952                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
5953
5954                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
5955                 break;
5956         default:
5957                 ret = -EINVAL;
5958         }
5959
5960         IWL_DEBUG_MAC80211("leave\n");
5961
5962         return ret;
5963 }
5964
5965 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
5966                            const struct ieee80211_tx_queue_params *params)
5967 {
5968         struct iwl_priv *priv = hw->priv;
5969         unsigned long flags;
5970         int q;
5971
5972         IWL_DEBUG_MAC80211("enter\n");
5973
5974         if (!iwl_is_ready_rf(priv)) {
5975                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
5976                 return -EIO;
5977         }
5978
5979         if (queue >= AC_NUM) {
5980                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
5981                 return 0;
5982         }
5983
5984         if (!priv->qos_data.qos_enable) {
5985                 priv->qos_data.qos_active = 0;
5986                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
5987                 return 0;
5988         }
5989         q = AC_NUM - 1 - queue;
5990
5991         spin_lock_irqsave(&priv->lock, flags);
5992
5993         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
5994         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
5995         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
5996         priv->qos_data.def_qos_parm.ac[q].edca_txop =
5997                         cpu_to_le16((params->txop * 32));
5998
5999         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6000         priv->qos_data.qos_active = 1;
6001
6002         spin_unlock_irqrestore(&priv->lock, flags);
6003
6004         mutex_lock(&priv->mutex);
6005         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6006                 iwl4965_activate_qos(priv, 1);
6007         else if (priv->assoc_id && iwl_is_associated(priv))
6008                 iwl4965_activate_qos(priv, 0);
6009
6010         mutex_unlock(&priv->mutex);
6011
6012         IWL_DEBUG_MAC80211("leave\n");
6013         return 0;
6014 }
6015
6016 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6017                                 struct ieee80211_tx_queue_stats *stats)
6018 {
6019         struct iwl_priv *priv = hw->priv;
6020         int i, avail;
6021         struct iwl4965_tx_queue *txq;
6022         struct iwl4965_queue *q;
6023         unsigned long flags;
6024
6025         IWL_DEBUG_MAC80211("enter\n");
6026
6027         if (!iwl_is_ready_rf(priv)) {
6028                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6029                 return -EIO;
6030         }
6031
6032         spin_lock_irqsave(&priv->lock, flags);
6033
6034         for (i = 0; i < AC_NUM; i++) {
6035                 txq = &priv->txq[i];
6036                 q = &txq->q;
6037                 avail = iwl4965_queue_space(q);
6038
6039                 stats[i].len = q->n_window - avail;
6040                 stats[i].limit = q->n_window - q->high_mark;
6041                 stats[i].count = q->n_window;
6042
6043         }
6044         spin_unlock_irqrestore(&priv->lock, flags);
6045
6046         IWL_DEBUG_MAC80211("leave\n");
6047
6048         return 0;
6049 }
6050
6051 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6052                              struct ieee80211_low_level_stats *stats)
6053 {
6054         struct iwl_priv *priv = hw->priv;
6055
6056         priv = hw->priv;
6057         IWL_DEBUG_MAC80211("enter\n");
6058         IWL_DEBUG_MAC80211("leave\n");
6059
6060         return 0;
6061 }
6062
6063 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6064 {
6065         struct iwl_priv *priv;
6066
6067         priv = hw->priv;
6068         IWL_DEBUG_MAC80211("enter\n");
6069         IWL_DEBUG_MAC80211("leave\n");
6070
6071         return 0;
6072 }
6073
6074 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6075 {
6076         struct iwl_priv *priv = hw->priv;
6077         unsigned long flags;
6078
6079         mutex_lock(&priv->mutex);
6080         IWL_DEBUG_MAC80211("enter\n");
6081
6082         priv->lq_mngr.lq_ready = 0;
6083 #ifdef CONFIG_IWL4965_HT
6084         spin_lock_irqsave(&priv->lock, flags);
6085         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6086         spin_unlock_irqrestore(&priv->lock, flags);
6087 #endif /* CONFIG_IWL4965_HT */
6088
6089         iwl_reset_qos(priv);
6090
6091         cancel_delayed_work(&priv->post_associate);
6092
6093         spin_lock_irqsave(&priv->lock, flags);
6094         priv->assoc_id = 0;
6095         priv->assoc_capability = 0;
6096         priv->assoc_station_added = 0;
6097
6098         /* new association get rid of ibss beacon skb */
6099         if (priv->ibss_beacon)
6100                 dev_kfree_skb(priv->ibss_beacon);
6101
6102         priv->ibss_beacon = NULL;
6103
6104         priv->beacon_int = priv->hw->conf.beacon_int;
6105         priv->timestamp = 0;
6106         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6107                 priv->beacon_int = 0;
6108
6109         spin_unlock_irqrestore(&priv->lock, flags);
6110
6111         if (!iwl_is_ready_rf(priv)) {
6112                 IWL_DEBUG_MAC80211("leave - not ready\n");
6113                 mutex_unlock(&priv->mutex);
6114                 return;
6115         }
6116
6117         /* we are restarting association process
6118          * clear RXON_FILTER_ASSOC_MSK bit
6119          */
6120         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6121                 iwl4965_scan_cancel_timeout(priv, 100);
6122                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6123                 iwl4965_commit_rxon(priv);
6124         }
6125
6126         iwl_power_update_mode(priv, 0);
6127
6128         /* Per mac80211.h: This is only used in IBSS mode... */
6129         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6130
6131                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6132                 mutex_unlock(&priv->mutex);
6133                 return;
6134         }
6135
6136         iwl4965_set_rate(priv);
6137
6138         mutex_unlock(&priv->mutex);
6139
6140         IWL_DEBUG_MAC80211("leave\n");
6141 }
6142
6143 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
6144                                  struct ieee80211_tx_control *control)
6145 {
6146         struct iwl_priv *priv = hw->priv;
6147         unsigned long flags;
6148
6149         mutex_lock(&priv->mutex);
6150         IWL_DEBUG_MAC80211("enter\n");
6151
6152         if (!iwl_is_ready_rf(priv)) {
6153                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6154                 mutex_unlock(&priv->mutex);
6155                 return -EIO;
6156         }
6157
6158         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6159                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6160                 mutex_unlock(&priv->mutex);
6161                 return -EIO;
6162         }
6163
6164         spin_lock_irqsave(&priv->lock, flags);
6165
6166         if (priv->ibss_beacon)
6167                 dev_kfree_skb(priv->ibss_beacon);
6168
6169         priv->ibss_beacon = skb;
6170
6171         priv->assoc_id = 0;
6172
6173         IWL_DEBUG_MAC80211("leave\n");
6174         spin_unlock_irqrestore(&priv->lock, flags);
6175
6176         iwl_reset_qos(priv);
6177
6178         queue_work(priv->workqueue, &priv->post_associate.work);
6179
6180         mutex_unlock(&priv->mutex);
6181
6182         return 0;
6183 }
6184
6185 /*****************************************************************************
6186  *
6187  * sysfs attributes
6188  *
6189  *****************************************************************************/
6190
6191 #ifdef CONFIG_IWLWIFI_DEBUG
6192
6193 /*
6194  * The following adds a new attribute to the sysfs representation
6195  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6196  * used for controlling the debug level.
6197  *
6198  * See the level definitions in iwl for details.
6199  */
6200
6201 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6202 {
6203         return sprintf(buf, "0x%08X\n", iwl_debug_level);
6204 }
6205 static ssize_t store_debug_level(struct device_driver *d,
6206                                  const char *buf, size_t count)
6207 {
6208         char *p = (char *)buf;
6209         u32 val;
6210
6211         val = simple_strtoul(p, &p, 0);
6212         if (p == buf)
6213                 printk(KERN_INFO DRV_NAME
6214                        ": %s is not in hex or decimal form.\n", buf);
6215         else
6216                 iwl_debug_level = val;
6217
6218         return strnlen(buf, count);
6219 }
6220
6221 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6222                    show_debug_level, store_debug_level);
6223
6224 #endif /* CONFIG_IWLWIFI_DEBUG */
6225
6226
6227 static ssize_t show_temperature(struct device *d,
6228                                 struct device_attribute *attr, char *buf)
6229 {
6230         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6231
6232         if (!iwl_is_alive(priv))
6233                 return -EAGAIN;
6234
6235         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6236 }
6237
6238 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6239
6240 static ssize_t show_rs_window(struct device *d,
6241                               struct device_attribute *attr,
6242                               char *buf)
6243 {
6244         struct iwl_priv *priv = d->driver_data;
6245         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
6246 }
6247 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
6248
6249 static ssize_t show_tx_power(struct device *d,
6250                              struct device_attribute *attr, char *buf)
6251 {
6252         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6253         return sprintf(buf, "%d\n", priv->user_txpower_limit);
6254 }
6255
6256 static ssize_t store_tx_power(struct device *d,
6257                               struct device_attribute *attr,
6258                               const char *buf, size_t count)
6259 {
6260         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6261         char *p = (char *)buf;
6262         u32 val;
6263
6264         val = simple_strtoul(p, &p, 10);
6265         if (p == buf)
6266                 printk(KERN_INFO DRV_NAME
6267                        ": %s is not in decimal form.\n", buf);
6268         else
6269                 iwl4965_hw_reg_set_txpower(priv, val);
6270
6271         return count;
6272 }
6273
6274 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6275
6276 static ssize_t show_flags(struct device *d,
6277                           struct device_attribute *attr, char *buf)
6278 {
6279         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6280
6281         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
6282 }
6283
6284 static ssize_t store_flags(struct device *d,
6285                            struct device_attribute *attr,
6286                            const char *buf, size_t count)
6287 {
6288         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6289         u32 flags = simple_strtoul(buf, NULL, 0);
6290
6291         mutex_lock(&priv->mutex);
6292         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
6293                 /* Cancel any currently running scans... */
6294                 if (iwl4965_scan_cancel_timeout(priv, 100))
6295                         IWL_WARNING("Could not cancel scan.\n");
6296                 else {
6297                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6298                                        flags);
6299                         priv->staging_rxon.flags = cpu_to_le32(flags);
6300                         iwl4965_commit_rxon(priv);
6301                 }
6302         }
6303         mutex_unlock(&priv->mutex);
6304
6305         return count;
6306 }
6307
6308 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6309
6310 static ssize_t show_filter_flags(struct device *d,
6311                                  struct device_attribute *attr, char *buf)
6312 {
6313         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6314
6315         return sprintf(buf, "0x%04X\n",
6316                 le32_to_cpu(priv->active_rxon.filter_flags));
6317 }
6318
6319 static ssize_t store_filter_flags(struct device *d,
6320                                   struct device_attribute *attr,
6321                                   const char *buf, size_t count)
6322 {
6323         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6324         u32 filter_flags = simple_strtoul(buf, NULL, 0);
6325
6326         mutex_lock(&priv->mutex);
6327         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
6328                 /* Cancel any currently running scans... */
6329                 if (iwl4965_scan_cancel_timeout(priv, 100))
6330                         IWL_WARNING("Could not cancel scan.\n");
6331                 else {
6332                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
6333                                        "0x%04X\n", filter_flags);
6334                         priv->staging_rxon.filter_flags =
6335                                 cpu_to_le32(filter_flags);
6336                         iwl4965_commit_rxon(priv);
6337                 }
6338         }
6339         mutex_unlock(&priv->mutex);
6340
6341         return count;
6342 }
6343
6344 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
6345                    store_filter_flags);
6346
6347 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
6348
6349 static ssize_t show_measurement(struct device *d,
6350                                 struct device_attribute *attr, char *buf)
6351 {
6352         struct iwl_priv *priv = dev_get_drvdata(d);
6353         struct iwl4965_spectrum_notification measure_report;
6354         u32 size = sizeof(measure_report), len = 0, ofs = 0;
6355         u8 *data = (u8 *) & measure_report;
6356         unsigned long flags;
6357
6358         spin_lock_irqsave(&priv->lock, flags);
6359         if (!(priv->measurement_status & MEASUREMENT_READY)) {
6360                 spin_unlock_irqrestore(&priv->lock, flags);
6361                 return 0;
6362         }
6363         memcpy(&measure_report, &priv->measure_report, size);
6364         priv->measurement_status = 0;
6365         spin_unlock_irqrestore(&priv->lock, flags);
6366
6367         while (size && (PAGE_SIZE - len)) {
6368                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6369                                    PAGE_SIZE - len, 1);
6370                 len = strlen(buf);
6371                 if (PAGE_SIZE - len)
6372                         buf[len++] = '\n';
6373
6374                 ofs += 16;
6375                 size -= min(size, 16U);
6376         }
6377
6378         return len;
6379 }
6380
6381 static ssize_t store_measurement(struct device *d,
6382                                  struct device_attribute *attr,
6383                                  const char *buf, size_t count)
6384 {
6385         struct iwl_priv *priv = dev_get_drvdata(d);
6386         struct ieee80211_measurement_params params = {
6387                 .channel = le16_to_cpu(priv->active_rxon.channel),
6388                 .start_time = cpu_to_le64(priv->last_tsf),
6389                 .duration = cpu_to_le16(1),
6390         };
6391         u8 type = IWL_MEASURE_BASIC;
6392         u8 buffer[32];
6393         u8 channel;
6394
6395         if (count) {
6396                 char *p = buffer;
6397                 strncpy(buffer, buf, min(sizeof(buffer), count));
6398                 channel = simple_strtoul(p, NULL, 0);
6399                 if (channel)
6400                         params.channel = channel;
6401
6402                 p = buffer;
6403                 while (*p && *p != ' ')
6404                         p++;
6405                 if (*p)
6406                         type = simple_strtoul(p + 1, NULL, 0);
6407         }
6408
6409         IWL_DEBUG_INFO("Invoking measurement of type %d on "
6410                        "channel %d (for '%s')\n", type, params.channel, buf);
6411         iwl4965_get_measurement(priv, &params, type);
6412
6413         return count;
6414 }
6415
6416 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
6417                    show_measurement, store_measurement);
6418 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
6419
6420 static ssize_t store_retry_rate(struct device *d,
6421                                 struct device_attribute *attr,
6422                                 const char *buf, size_t count)
6423 {
6424         struct iwl_priv *priv = dev_get_drvdata(d);
6425
6426         priv->retry_rate = simple_strtoul(buf, NULL, 0);
6427         if (priv->retry_rate <= 0)
6428                 priv->retry_rate = 1;
6429
6430         return count;
6431 }
6432
6433 static ssize_t show_retry_rate(struct device *d,
6434                                struct device_attribute *attr, char *buf)
6435 {
6436         struct iwl_priv *priv = dev_get_drvdata(d);
6437         return sprintf(buf, "%d", priv->retry_rate);
6438 }
6439
6440 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
6441                    store_retry_rate);
6442
6443 static ssize_t store_power_level(struct device *d,
6444                                  struct device_attribute *attr,
6445                                  const char *buf, size_t count)
6446 {
6447         struct iwl_priv *priv = dev_get_drvdata(d);
6448         int rc;
6449         int mode;
6450
6451         mode = simple_strtoul(buf, NULL, 0);
6452         mutex_lock(&priv->mutex);
6453
6454         if (!iwl_is_ready(priv)) {
6455                 rc = -EAGAIN;
6456                 goto out;
6457         }
6458
6459         rc = iwl_power_set_user_mode(priv, mode);
6460         if (rc) {
6461                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
6462                 goto out;
6463         }
6464         rc = count;
6465
6466  out:
6467         mutex_unlock(&priv->mutex);
6468         return rc;
6469 }
6470
6471 #define MAX_WX_STRING 80
6472
6473 /* Values are in microsecond */
6474 static const s32 timeout_duration[] = {
6475         350000,
6476         250000,
6477         75000,
6478         37000,
6479         25000,
6480 };
6481 static const s32 period_duration[] = {
6482         400000,
6483         700000,
6484         1000000,
6485         1000000,
6486         1000000
6487 };
6488
6489 static ssize_t show_power_level(struct device *d,
6490                                 struct device_attribute *attr, char *buf)
6491 {
6492         struct iwl_priv *priv = dev_get_drvdata(d);
6493         int level = priv->power_data.power_mode;
6494         char *p = buf;
6495
6496         p += sprintf(p, "%d ", level);
6497         switch (level) {
6498         case IWL_POWER_MODE_CAM:
6499         case IWL_POWER_AC:
6500                 p += sprintf(p, "(AC)");
6501                 break;
6502         case IWL_POWER_BATTERY:
6503                 p += sprintf(p, "(BATTERY)");
6504                 break;
6505         default:
6506                 p += sprintf(p,
6507                              "(Timeout %dms, Period %dms)",
6508                              timeout_duration[level - 1] / 1000,
6509                              period_duration[level - 1] / 1000);
6510         }
6511 /*
6512         if (!(priv->power_mode & IWL_POWER_ENABLED))
6513                 p += sprintf(p, " OFF\n");
6514         else
6515                 p += sprintf(p, " \n");
6516 */
6517         p += sprintf(p, " \n");
6518         return (p - buf + 1);
6519 }
6520
6521 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
6522                    store_power_level);
6523
6524 static ssize_t show_channels(struct device *d,
6525                              struct device_attribute *attr, char *buf)
6526 {
6527         /* all this shit doesn't belong into sysfs anyway */
6528         return 0;
6529 }
6530
6531 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
6532
6533 static ssize_t show_statistics(struct device *d,
6534                                struct device_attribute *attr, char *buf)
6535 {
6536         struct iwl_priv *priv = dev_get_drvdata(d);
6537         u32 size = sizeof(struct iwl4965_notif_statistics);
6538         u32 len = 0, ofs = 0;
6539         u8 *data = (u8 *) & priv->statistics;
6540         int rc = 0;
6541
6542         if (!iwl_is_alive(priv))
6543                 return -EAGAIN;
6544
6545         mutex_lock(&priv->mutex);
6546         rc = iwl_send_statistics_request(priv, 0);
6547         mutex_unlock(&priv->mutex);
6548
6549         if (rc) {
6550                 len = sprintf(buf,
6551                               "Error sending statistics request: 0x%08X\n", rc);
6552                 return len;
6553         }
6554
6555         while (size && (PAGE_SIZE - len)) {
6556                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6557                                    PAGE_SIZE - len, 1);
6558                 len = strlen(buf);
6559                 if (PAGE_SIZE - len)
6560                         buf[len++] = '\n';
6561
6562                 ofs += 16;
6563                 size -= min(size, 16U);
6564         }
6565
6566         return len;
6567 }
6568
6569 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
6570
6571 static ssize_t show_status(struct device *d,
6572                            struct device_attribute *attr, char *buf)
6573 {
6574         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6575         if (!iwl_is_alive(priv))
6576                 return -EAGAIN;
6577         return sprintf(buf, "0x%08x\n", (int)priv->status);
6578 }
6579
6580 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
6581
6582 static ssize_t dump_error_log(struct device *d,
6583                               struct device_attribute *attr,
6584                               const char *buf, size_t count)
6585 {
6586         char *p = (char *)buf;
6587
6588         if (p[0] == '1')
6589                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
6590
6591         return strnlen(buf, count);
6592 }
6593
6594 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
6595
6596 static ssize_t dump_event_log(struct device *d,
6597                               struct device_attribute *attr,
6598                               const char *buf, size_t count)
6599 {
6600         char *p = (char *)buf;
6601
6602         if (p[0] == '1')
6603                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
6604
6605         return strnlen(buf, count);
6606 }
6607
6608 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
6609
6610 /*****************************************************************************
6611  *
6612  * driver setup and teardown
6613  *
6614  *****************************************************************************/
6615
6616 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
6617 {
6618         priv->workqueue = create_workqueue(DRV_NAME);
6619
6620         init_waitqueue_head(&priv->wait_command_queue);
6621
6622         INIT_WORK(&priv->up, iwl4965_bg_up);
6623         INIT_WORK(&priv->restart, iwl4965_bg_restart);
6624         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
6625         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
6626         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
6627         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
6628         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
6629         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
6630         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
6631         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
6632         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
6633         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
6634
6635         iwl4965_hw_setup_deferred_work(priv);
6636
6637         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
6638                      iwl4965_irq_tasklet, (unsigned long)priv);
6639 }
6640
6641 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
6642 {
6643         iwl4965_hw_cancel_deferred_work(priv);
6644
6645         cancel_delayed_work_sync(&priv->init_alive_start);
6646         cancel_delayed_work(&priv->scan_check);
6647         cancel_delayed_work(&priv->alive_start);
6648         cancel_delayed_work(&priv->post_associate);
6649         cancel_work_sync(&priv->beacon_update);
6650 }
6651
6652 static struct attribute *iwl4965_sysfs_entries[] = {
6653         &dev_attr_channels.attr,
6654         &dev_attr_dump_errors.attr,
6655         &dev_attr_dump_events.attr,
6656         &dev_attr_flags.attr,
6657         &dev_attr_filter_flags.attr,
6658 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
6659         &dev_attr_measurement.attr,
6660 #endif
6661         &dev_attr_power_level.attr,
6662         &dev_attr_retry_rate.attr,
6663         &dev_attr_rs_window.attr,
6664         &dev_attr_statistics.attr,
6665         &dev_attr_status.attr,
6666         &dev_attr_temperature.attr,
6667         &dev_attr_tx_power.attr,
6668
6669         NULL
6670 };
6671
6672 static struct attribute_group iwl4965_attribute_group = {
6673         .name = NULL,           /* put in device directory */
6674         .attrs = iwl4965_sysfs_entries,
6675 };
6676
6677 static struct ieee80211_ops iwl4965_hw_ops = {
6678         .tx = iwl4965_mac_tx,
6679         .start = iwl4965_mac_start,
6680         .stop = iwl4965_mac_stop,
6681         .add_interface = iwl4965_mac_add_interface,
6682         .remove_interface = iwl4965_mac_remove_interface,
6683         .config = iwl4965_mac_config,
6684         .config_interface = iwl4965_mac_config_interface,
6685         .configure_filter = iwl4965_configure_filter,
6686         .set_key = iwl4965_mac_set_key,
6687         .update_tkip_key = iwl4965_mac_update_tkip_key,
6688         .get_stats = iwl4965_mac_get_stats,
6689         .get_tx_stats = iwl4965_mac_get_tx_stats,
6690         .conf_tx = iwl4965_mac_conf_tx,
6691         .get_tsf = iwl4965_mac_get_tsf,
6692         .reset_tsf = iwl4965_mac_reset_tsf,
6693         .beacon_update = iwl4965_mac_beacon_update,
6694         .bss_info_changed = iwl4965_bss_info_changed,
6695 #ifdef CONFIG_IWL4965_HT
6696         .ampdu_action = iwl4965_mac_ampdu_action,
6697 #endif  /* CONFIG_IWL4965_HT */
6698         .hw_scan = iwl4965_mac_hw_scan
6699 };
6700
6701 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6702 {
6703         int err = 0;
6704         struct iwl_priv *priv;
6705         struct ieee80211_hw *hw;
6706         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
6707         unsigned long flags;
6708         DECLARE_MAC_BUF(mac);
6709
6710         /************************
6711          * 1. Allocating HW data
6712          ************************/
6713
6714         /* Disabling hardware scan means that mac80211 will perform scans
6715          * "the hard way", rather than using device's scan. */
6716         if (cfg->mod_params->disable_hw_scan) {
6717                 if (cfg->mod_params->debug & IWL_DL_INFO)
6718                         dev_printk(KERN_DEBUG, &(pdev->dev),
6719                                    "Disabling hw_scan\n");
6720                 iwl4965_hw_ops.hw_scan = NULL;
6721         }
6722
6723         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
6724         if (!hw) {
6725                 err = -ENOMEM;
6726                 goto out;
6727         }
6728         priv = hw->priv;
6729         /* At this point both hw and priv are allocated. */
6730
6731         SET_IEEE80211_DEV(hw, &pdev->dev);
6732
6733         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
6734         priv->cfg = cfg;
6735         priv->pci_dev = pdev;
6736
6737 #ifdef CONFIG_IWLWIFI_DEBUG
6738         priv->debug_level = priv->cfg->mod_params->debug;
6739         atomic_set(&priv->restrict_refcnt, 0);
6740 #endif
6741
6742         /**************************
6743          * 2. Initializing PCI bus
6744          **************************/
6745         if (pci_enable_device(pdev)) {
6746                 err = -ENODEV;
6747                 goto out_ieee80211_free_hw;
6748         }
6749
6750         pci_set_master(pdev);
6751
6752         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
6753         if (!err)
6754                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
6755         if (err) {
6756                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
6757                 if (!err)
6758                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
6759                 /* both attempts failed: */
6760                 if (err) {
6761                         printk(KERN_WARNING "%s: No suitable DMA available.\n",
6762                                 DRV_NAME);
6763                         goto out_pci_disable_device;
6764                 }
6765         }
6766
6767         err = pci_request_regions(pdev, DRV_NAME);
6768         if (err)
6769                 goto out_pci_disable_device;
6770
6771         pci_set_drvdata(pdev, priv);
6772
6773         /* We disable the RETRY_TIMEOUT register (0x41) to keep
6774          * PCI Tx retries from interfering with C3 CPU state */
6775         pci_write_config_byte(pdev, 0x41, 0x00);
6776
6777         /***********************
6778          * 3. Read REV register
6779          ***********************/
6780         priv->hw_base = pci_iomap(pdev, 0, 0);
6781         if (!priv->hw_base) {
6782                 err = -ENODEV;
6783                 goto out_pci_release_regions;
6784         }
6785
6786         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
6787                 (unsigned long long) pci_resource_len(pdev, 0));
6788         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
6789
6790         iwl_hw_detect(priv);
6791         printk(KERN_INFO DRV_NAME
6792                 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
6793                 priv->cfg->name, priv->hw_rev);
6794
6795         /* amp init */
6796         err = priv->cfg->ops->lib->apm_ops.init(priv);
6797         if (err < 0) {
6798                 IWL_DEBUG_INFO("Failed to init APMG\n");
6799                 goto out_iounmap;
6800         }
6801         /*****************
6802          * 4. Read EEPROM
6803          *****************/
6804         /* Read the EEPROM */
6805         err = iwl_eeprom_init(priv);
6806         if (err) {
6807                 IWL_ERROR("Unable to init EEPROM\n");
6808                 goto out_iounmap;
6809         }
6810         err = iwl_eeprom_check_version(priv);
6811         if (err)
6812                 goto out_iounmap;
6813
6814         /* MAC Address location in EEPROM same for 3945/4965 */
6815         iwl_eeprom_get_mac(priv, priv->mac_addr);
6816         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
6817         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6818
6819         /************************
6820          * 5. Setup HW constants
6821          ************************/
6822         /* Device-specific setup */
6823         if (priv->cfg->ops->lib->set_hw_params(priv)) {
6824                 IWL_ERROR("failed to set hw parameters\n");
6825                 goto out_free_eeprom;
6826         }
6827
6828         /*******************
6829          * 6. Setup hw/priv
6830          *******************/
6831
6832         err = iwl_setup(priv);
6833         if (err)
6834                 goto out_free_eeprom;
6835         /* At this point both hw and priv are initialized. */
6836
6837         /**********************************
6838          * 7. Initialize module parameters
6839          **********************************/
6840
6841         /* Disable radio (SW RF KILL) via parameter when loading driver */
6842         if (priv->cfg->mod_params->disable) {
6843                 set_bit(STATUS_RF_KILL_SW, &priv->status);
6844                 IWL_DEBUG_INFO("Radio disabled.\n");
6845         }
6846
6847         if (priv->cfg->mod_params->enable_qos)
6848                 priv->qos_data.qos_enable = 1;
6849
6850         /********************
6851          * 8. Setup services
6852          ********************/
6853         spin_lock_irqsave(&priv->lock, flags);
6854         iwl4965_disable_interrupts(priv);
6855         spin_unlock_irqrestore(&priv->lock, flags);
6856
6857         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
6858         if (err) {
6859                 IWL_ERROR("failed to create sysfs device attributes\n");
6860                 goto out_free_eeprom;
6861         }
6862
6863         err = iwl_dbgfs_register(priv, DRV_NAME);
6864         if (err) {
6865                 IWL_ERROR("failed to create debugfs files\n");
6866                 goto out_remove_sysfs;
6867         }
6868
6869         iwl4965_setup_deferred_work(priv);
6870         iwl4965_setup_rx_handlers(priv);
6871
6872         /********************
6873          * 9. Conclude
6874          ********************/
6875         pci_save_state(pdev);
6876         pci_disable_device(pdev);
6877
6878         /* notify iwlcore to init */
6879         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
6880         return 0;
6881
6882  out_remove_sysfs:
6883         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
6884  out_free_eeprom:
6885         iwl_eeprom_free(priv);
6886  out_iounmap:
6887         pci_iounmap(pdev, priv->hw_base);
6888  out_pci_release_regions:
6889         pci_release_regions(pdev);
6890         pci_set_drvdata(pdev, NULL);
6891  out_pci_disable_device:
6892         pci_disable_device(pdev);
6893  out_ieee80211_free_hw:
6894         ieee80211_free_hw(priv->hw);
6895  out:
6896         return err;
6897 }
6898
6899 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
6900 {
6901         struct iwl_priv *priv = pci_get_drvdata(pdev);
6902         struct list_head *p, *q;
6903         int i;
6904         unsigned long flags;
6905
6906         if (!priv)
6907                 return;
6908
6909         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
6910
6911         if (priv->mac80211_registered) {
6912                 ieee80211_unregister_hw(priv->hw);
6913                 priv->mac80211_registered = 0;
6914         }
6915
6916         set_bit(STATUS_EXIT_PENDING, &priv->status);
6917
6918         iwl4965_down(priv);
6919
6920         /* make sure we flush any pending irq or
6921          * tasklet for the driver
6922          */
6923         spin_lock_irqsave(&priv->lock, flags);
6924         iwl4965_disable_interrupts(priv);
6925         spin_unlock_irqrestore(&priv->lock, flags);
6926
6927         iwl_synchronize_irq(priv);
6928
6929         /* Free MAC hash list for ADHOC */
6930         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
6931                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
6932                         list_del(p);
6933                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
6934                 }
6935         }
6936
6937         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
6938         iwl_dbgfs_unregister(priv);
6939         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
6940
6941         iwl4965_dealloc_ucode_pci(priv);
6942
6943         if (priv->rxq.bd)
6944                 iwl_rx_queue_free(priv, &priv->rxq);
6945         iwl4965_hw_txq_ctx_free(priv);
6946
6947         iwlcore_clear_stations_table(priv);
6948         iwl_eeprom_free(priv);
6949
6950
6951         /*netif_stop_queue(dev); */
6952         flush_workqueue(priv->workqueue);
6953
6954         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
6955          * priv->workqueue... so we can't take down the workqueue
6956          * until now... */
6957         destroy_workqueue(priv->workqueue);
6958         priv->workqueue = NULL;
6959
6960         pci_iounmap(pdev, priv->hw_base);
6961         pci_release_regions(pdev);
6962         pci_disable_device(pdev);
6963         pci_set_drvdata(pdev, NULL);
6964
6965         iwl_free_channel_map(priv);
6966         iwlcore_free_geos(priv);
6967
6968         if (priv->ibss_beacon)
6969                 dev_kfree_skb(priv->ibss_beacon);
6970
6971         ieee80211_free_hw(priv->hw);
6972 }
6973
6974 #ifdef CONFIG_PM
6975
6976 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
6977 {
6978         struct iwl_priv *priv = pci_get_drvdata(pdev);
6979
6980         if (priv->is_open) {
6981                 set_bit(STATUS_IN_SUSPEND, &priv->status);
6982                 iwl4965_mac_stop(priv->hw);
6983                 priv->is_open = 1;
6984         }
6985
6986         pci_set_power_state(pdev, PCI_D3hot);
6987
6988         return 0;
6989 }
6990
6991 static int iwl4965_pci_resume(struct pci_dev *pdev)
6992 {
6993         struct iwl_priv *priv = pci_get_drvdata(pdev);
6994
6995         pci_set_power_state(pdev, PCI_D0);
6996
6997         if (priv->is_open)
6998                 iwl4965_mac_start(priv->hw);
6999
7000         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7001         return 0;
7002 }
7003
7004 #endif /* CONFIG_PM */
7005
7006 /*****************************************************************************
7007  *
7008  * driver and module entry point
7009  *
7010  *****************************************************************************/
7011
7012 /* Hardware specific file defines the PCI IDs table for that hardware module */
7013 static struct pci_device_id iwl_hw_card_ids[] = {
7014         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7015         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7016 #ifdef CONFIG_IWL5000
7017         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
7018         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
7019         {IWL_PCI_DEVICE(0x423A, PCI_ANY_ID, iwl5350_agn_cfg)},
7020 #endif /* CONFIG_IWL5000 */
7021         {0}
7022 };
7023 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7024
7025 static struct pci_driver iwl_driver = {
7026         .name = DRV_NAME,
7027         .id_table = iwl_hw_card_ids,
7028         .probe = iwl4965_pci_probe,
7029         .remove = __devexit_p(iwl4965_pci_remove),
7030 #ifdef CONFIG_PM
7031         .suspend = iwl4965_pci_suspend,
7032         .resume = iwl4965_pci_resume,
7033 #endif
7034 };
7035
7036 static int __init iwl4965_init(void)
7037 {
7038
7039         int ret;
7040         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7041         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7042
7043         ret = iwl4965_rate_control_register();
7044         if (ret) {
7045                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7046                 return ret;
7047         }
7048
7049         ret = pci_register_driver(&iwl_driver);
7050         if (ret) {
7051                 IWL_ERROR("Unable to initialize PCI module\n");
7052                 goto error_register;
7053         }
7054 #ifdef CONFIG_IWLWIFI_DEBUG
7055         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7056         if (ret) {
7057                 IWL_ERROR("Unable to create driver sysfs file\n");
7058                 goto error_debug;
7059         }
7060 #endif
7061
7062         return ret;
7063
7064 #ifdef CONFIG_IWLWIFI_DEBUG
7065 error_debug:
7066         pci_unregister_driver(&iwl_driver);
7067 #endif
7068 error_register:
7069         iwl4965_rate_control_unregister();
7070         return ret;
7071 }
7072
7073 static void __exit iwl4965_exit(void)
7074 {
7075 #ifdef CONFIG_IWLWIFI_DEBUG
7076         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7077 #endif
7078         pci_unregister_driver(&iwl_driver);
7079         iwl4965_rate_control_unregister();
7080 }
7081
7082 module_exit(iwl4965_exit);
7083 module_init(iwl4965_init);