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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-eeprom.h"
  49 #include "iwl-4965.h"
  50 #include "iwl-core.h"
  51 #include "iwl-io.h"
  52 #include "iwl-helpers.h"
  53 #include "iwl-sta.h"
  54
  55 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
  56                                   struct iwl4965_tx_queue *txq);
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  67  */
  68
  69 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  70
  71 #ifdef CONFIG_IWLWIFI_DEBUG
  72 #define VD "d"
  73 #else
  74 #define VD
  75 #endif
  76
  77 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  78 #define VS "s"
  79 #else
  80 #define VS
  81 #endif
  82
  83 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  84
  85
  86 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  87 MODULE_VERSION(DRV_VERSION);
  88 MODULE_AUTHOR(DRV_COPYRIGHT);
  89 MODULE_LICENSE("GPL");
  90
  91 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
  92 {
  93         u16 fc = le16_to_cpu(hdr->frame_control);
  94         int hdr_len = ieee80211_get_hdrlen(fc);
  95
  96         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
  97                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
  98         return NULL;
  99 }
 100
 101 static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
 102                 struct iwl_priv *priv, enum ieee80211_band band)
 103 {
 104         return priv->hw->wiphy->bands[band];
 105 }
 106
 107 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 108 {
 109         /* Single white space is for Linksys APs */
 110         if (essid_len == 1 && essid[0] == ' ')
 111                 return 1;
 112
 113         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 114         while (essid_len) {
 115                 essid_len--;
 116                 if (essid[essid_len] != '\0')
 117                         return 0;
 118         }
 119
 120         return 1;
 121 }
 122
 123 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 124 {
 125         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 126         const char *s = essid;
 127         char *d = escaped;
 128
 129         if (iwl4965_is_empty_essid(essid, essid_len)) {
 130                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 131                 return escaped;
 132         }
 133
 134         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 135         while (essid_len--) {
 136                 if (*s == '\0') {
 137                         *d++ = '\\';
 138                         *d++ = '0';
 139                         s++;
 140                 } else
 141                         *d++ = *s++;
 142         }
 143         *d = '\0';
 144         return escaped;
 145 }
 146
 147 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 148  * DMA services
 149  *
 150  * Theory of operation
 151  *
 152  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 153  * of buffer descriptors, each of which points to one or more data buffers for
 154  * the device to read from or fill.  Driver and device exchange status of each
 155  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 156  * entries in each circular buffer, to protect against confusing empty and full
 157  * queue states.
 158  *
 159  * The device reads or writes the data in the queues via the device's several
 160  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 161  *
 162  * For Tx queue, there are low mark and high mark limits. If, after queuing
 163  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 164  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 165  * Tx queue resumed.
 166  *
 167  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 168  * queue (#4) for sending commands to the device firmware, and 15 other
 169  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 170  *
 171  * See more detailed info in iwl-4965-hw.h.
 172  ***************************************************/
 173
 174 int iwl4965_queue_space(const struct iwl4965_queue *q)
 175 {
 176         int s = q->read_ptr - q->write_ptr;
 177
 178         if (q->read_ptr > q->write_ptr)
 179                 s -= q->n_bd;
 180
 181         if (s <= 0)
 182                 s += q->n_window;
 183         /* keep some reserve to not confuse empty and full situations */
 184         s -= 2;
 185         if (s < 0)
 186                 s = 0;
 187         return s;
 188 }
 189
 190
 191 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 192 {
 193         return q->write_ptr > q->read_ptr ?
 194                 (i >= q->read_ptr && i < q->write_ptr) :
 195                 !(i < q->read_ptr && i >= q->write_ptr);
 196 }
 197
 198 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 199 {
 200         /* This is for scan command, the big buffer at end of command array */
 201         if (is_huge)
 202                 return q->n_window;     /* must be power of 2 */
 203
 204         /* Otherwise, use normal size buffers */
 205         return index & (q->n_window - 1);
 206 }
 207
 208 /**
 209  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 210  */
 211 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
 212                           int count, int slots_num, u32 id)
 213 {
 214         q->n_bd = count;
 215         q->n_window = slots_num;
 216         q->id = id;
 217
 218         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 219          * and iwl_queue_dec_wrap are broken. */
 220         BUG_ON(!is_power_of_2(count));
 221
 222         /* slots_num must be power-of-two size, otherwise
 223          * get_cmd_index is broken. */
 224         BUG_ON(!is_power_of_2(slots_num));
 225
 226         q->low_mark = q->n_window / 4;
 227         if (q->low_mark < 4)
 228                 q->low_mark = 4;
 229
 230         q->high_mark = q->n_window / 8;
 231         if (q->high_mark < 2)
 232                 q->high_mark = 2;
 233
 234         q->write_ptr = q->read_ptr = 0;
 235
 236         return 0;
 237 }
 238
 239 /**
 240  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 241  */
 242 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
 243                               struct iwl4965_tx_queue *txq, u32 id)
 244 {
 245         struct pci_dev *dev = priv->pci_dev;
 246
 247         /* Driver private data, only for Tx (not command) queues,
 248          * not shared with device. */
 249         if (id != IWL_CMD_QUEUE_NUM) {
 250                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 251                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 252                 if (!txq->txb) {
 253                         IWL_ERROR("kmalloc for auxiliary BD "
 254                                   "structures failed\n");
 255                         goto error;
 256                 }
 257         } else
 258                 txq->txb = NULL;
 259
 260         /* Circular buffer of transmit frame descriptors (TFDs),
 261          * shared with device */
 262         txq->bd = pci_alloc_consistent(dev,
 263                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 264                         &txq->q.dma_addr);
 265
 266         if (!txq->bd) {
 267                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 268                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 269                 goto error;
 270         }
 271         txq->q.id = id;
 272
 273         return 0;
 274
 275  error:
 276         if (txq->txb) {
 277                 kfree(txq->txb);
 278                 txq->txb = NULL;
 279         }
 280
 281         return -ENOMEM;
 282 }
 283
 284 /**
 285  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 286  */
 287 int iwl4965_tx_queue_init(struct iwl_priv *priv,
 288                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 289 {
 290         struct pci_dev *dev = priv->pci_dev;
 291         int len;
 292         int rc = 0;
 293
 294         /*
 295          * Alloc buffer array for commands (Tx or other types of commands).
 296          * For the command queue (#4), allocate command space + one big
 297          * command for scan, since scan command is very huge; the system will
 298          * not have two scans at the same time, so only one is needed.
 299          * For normal Tx queues (all other queues), no super-size command
 300          * space is needed.
 301          */
 302         len = sizeof(struct iwl_cmd) * slots_num;
 303         if (txq_id == IWL_CMD_QUEUE_NUM)
 304                 len +=  IWL_MAX_SCAN_SIZE;
 305         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 306         if (!txq->cmd)
 307                 return -ENOMEM;
 308
 309         /* Alloc driver data array and TFD circular buffer */
 310         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 311         if (rc) {
 312                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 313
 314                 return -ENOMEM;
 315         }
 316         txq->need_update = 0;
 317
 318         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 319          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 320         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 321
 322         /* Initialize queue's high/low-water marks, and head/tail indexes */
 323         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 324
 325         /* Tell device where to find queue */
 326         iwl4965_hw_tx_queue_init(priv, txq);
 327
 328         return 0;
 329 }
 330
 331 /**
 332  * iwl4965_tx_queue_free - Deallocate DMA queue.
 333  * @txq: Transmit queue to deallocate.
 334  *
 335  * Empty queue by removing and destroying all BD's.
 336  * Free all buffers.
 337  * 0-fill, but do not free "txq" descriptor structure.
 338  */
 339 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
 340 {
 341         struct iwl4965_queue *q = &txq->q;
 342         struct pci_dev *dev = priv->pci_dev;
 343         int len;
 344
 345         if (q->n_bd == 0)
 346                 return;
 347
 348         /* first, empty all BD's */
 349         for (; q->write_ptr != q->read_ptr;
 350              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 351                 iwl4965_hw_txq_free_tfd(priv, txq);
 352
 353         len = sizeof(struct iwl_cmd) * q->n_window;
 354         if (q->id == IWL_CMD_QUEUE_NUM)
 355                 len += IWL_MAX_SCAN_SIZE;
 356
 357         /* De-alloc array of command/tx buffers */
 358         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 359
 360         /* De-alloc circular buffer of TFDs */
 361         if (txq->q.n_bd)
 362                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 363                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 364
 365         /* De-alloc array of per-TFD driver data */
 366         if (txq->txb) {
 367                 kfree(txq->txb);
 368                 txq->txb = NULL;
 369         }
 370
 371         /* 0-fill queue descriptor structure */
 372         memset(txq, 0, sizeof(*txq));
 373 }
 374
 375 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 376
 377 /*************** STATION TABLE MANAGEMENT ****
 378  * mac80211 should be examined to determine if sta_info is duplicating
 379  * the functionality provided here
 380  */
 381
 382 /**************************************************************/
 383
 384 #if 0 /* temporary disable till we add real remove station */
 385 /**
 386  * iwl4965_remove_station - Remove driver's knowledge of station.
 387  *
 388  * NOTE:  This does not remove station from device's station table.
 389  */
 390 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 391 {
 392         int index = IWL_INVALID_STATION;
 393         int i;
 394         unsigned long flags;
 395
 396         spin_lock_irqsave(&priv->sta_lock, flags);
 397
 398         if (is_ap)
 399                 index = IWL_AP_ID;
 400         else if (is_broadcast_ether_addr(addr))
 401                 index = priv->hw_params.bcast_sta_id;
 402         else
 403                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 404                         if (priv->stations[i].used &&
 405                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 406                                                 addr)) {
 407                                 index = i;
 408                                 break;
 409                         }
 410
 411         if (unlikely(index == IWL_INVALID_STATION))
 412                 goto out;
 413
 414         if (priv->stations[index].used) {
 415                 priv->stations[index].used = 0;
 416                 priv->num_stations--;
 417         }
 418
 419         BUG_ON(priv->num_stations < 0);
 420
 421 out:
 422         spin_unlock_irqrestore(&priv->sta_lock, flags);
 423         return 0;
 424 }
 425 #endif
 426
 427 /**
 428  * iwl4965_add_station_flags - Add station to tables in driver and device
 429  */
 430 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
 431                                 int is_ap, u8 flags, void *ht_data)
 432 {
 433         int i;
 434         int index = IWL_INVALID_STATION;
 435         struct iwl4965_station_entry *station;
 436         unsigned long flags_spin;
 437         DECLARE_MAC_BUF(mac);
 438
 439         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 440         if (is_ap)
 441                 index = IWL_AP_ID;
 442         else if (is_broadcast_ether_addr(addr))
 443                 index = priv->hw_params.bcast_sta_id;
 444         else
 445                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 446                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 447                                                 addr)) {
 448                                 index = i;
 449                                 break;
 450                         }
 451
 452                         if (!priv->stations[i].used &&
 453                             index == IWL_INVALID_STATION)
 454                                 index = i;
 455                 }
 456
 457
 458         /* These two conditions have the same outcome, but keep them separate
 459           since they have different meanings */
 460         if (unlikely(index == IWL_INVALID_STATION)) {
 461                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 462                 return index;
 463         }
 464
 465         if (priv->stations[index].used &&
 466             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 467                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 468                 return index;
 469         }
 470
 471
 472         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 473         station = &priv->stations[index];
 474         station->used = 1;
 475         priv->num_stations++;
 476
 477         /* Set up the REPLY_ADD_STA command to send to device */
 478         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 479         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 480         station->sta.mode = 0;
 481         station->sta.sta.sta_id = index;
 482         station->sta.station_flags = 0;
 483
 484 #ifdef CONFIG_IWL4965_HT
 485         /* BCAST station and IBSS stations do not work in HT mode */
 486         if (index != priv->hw_params.bcast_sta_id &&
 487             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 488                 iwl4965_set_ht_add_station(priv, index,
 489                                  (struct ieee80211_ht_info *) ht_data);
 490 #endif /*CONFIG_IWL4965_HT*/
 491
 492         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 493
 494         /* Add station to device's station table */
 495         iwl4965_send_add_station(priv, &station->sta, flags);
 496         return index;
 497
 498 }
 499
 500
 501
 502 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 503
 504 /**
 505  * iwl4965_enqueue_hcmd - enqueue a uCode command
 506  * @priv: device private data point
 507  * @cmd: a point to the ucode command structure
 508  *
 509  * The function returns < 0 values to indicate the operation is
 510  * failed. On success, it turns the index (> 0) of command in the
 511  * command queue.
 512  */
 513 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 514 {
 515         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 516         struct iwl4965_queue *q = &txq->q;
 517         struct iwl4965_tfd_frame *tfd;
 518         u32 *control_flags;
 519         struct iwl_cmd *out_cmd;
 520         u32 idx;
 521         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 522         dma_addr_t phys_addr;
 523         int ret;
 524         unsigned long flags;
 525
 526         /* If any of the command structures end up being larger than
 527          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 528          * we will need to increase the size of the TFD entries */
 529         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 530                !(cmd->meta.flags & CMD_SIZE_HUGE));
 531
 532         if (iwl_is_rfkill(priv)) {
 533                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 534                 return -EIO;
 535         }
 536
 537         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 538                 IWL_ERROR("No space for Tx\n");
 539                 return -ENOSPC;
 540         }
 541
 542         spin_lock_irqsave(&priv->hcmd_lock, flags);
 543
 544         tfd = &txq->bd[q->write_ptr];
 545         memset(tfd, 0, sizeof(*tfd));
 546
 547         control_flags = (u32 *) tfd;
 548
 549         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 550         out_cmd = &txq->cmd[idx];
 551
 552         out_cmd->hdr.cmd = cmd->id;
 553         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 554         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 555
 556         /* At this point, the out_cmd now has all of the incoming cmd
 557          * information */
 558
 559         out_cmd->hdr.flags = 0;
 560         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 561                         INDEX_TO_SEQ(q->write_ptr));
 562         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 563                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 564
 565         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 566                         offsetof(struct iwl_cmd, hdr);
 567         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 568
 569         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 570                      "%d bytes at %d[%d]:%d\n",
 571                      get_cmd_string(out_cmd->hdr.cmd),
 572                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 573                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 574
 575         txq->need_update = 1;
 576
 577         /* Set up entry in queue's byte count circular buffer */
 578         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
 579
 580         /* Increment and update queue's write index */
 581         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 582         ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
 583
 584         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 585         return ret ? ret : idx;
 586 }
 587
 588 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 589 {
 590         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 591
 592         if (hw_decrypt)
 593                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 594         else
 595                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 596
 597 }
 598
 599 /**
 600  * iwl4965_rxon_add_station - add station into station table.
 601  *
 602  * there is only one AP station with id= IWL_AP_ID
 603  * NOTE: mutex must be held before calling this fnction
 604  */
 605 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 606                                 const u8 *addr, int is_ap)
 607 {
 608         u8 sta_id;
 609
 610         /* Add station to device's station table */
 611 #ifdef CONFIG_IWL4965_HT
 612         struct ieee80211_conf *conf = &priv->hw->conf;
 613         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 614
 615         if ((is_ap) &&
 616             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 617             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 618                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 619                                                    0, cur_ht_config);
 620         else
 621 #endif /* CONFIG_IWL4965_HT */
 622                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 623                                                    0, NULL);
 624
 625         /* Set up default rate scaling table in device's station table */
 626         iwl4965_add_station(priv, addr, is_ap);
 627
 628         return sta_id;
 629 }
 630
 631 /**
 632  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 633  *
 634  * NOTE:  This is really only useful during development and can eventually
 635  * be #ifdef'd out once the driver is stable and folks aren't actively
 636  * making changes
 637  */
 638 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 639 {
 640         int error = 0;
 641         int counter = 1;
 642
 643         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 644                 error |= le32_to_cpu(rxon->flags &
 645                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 646                                  RXON_FLG_RADAR_DETECT_MSK));
 647                 if (error)
 648                         IWL_WARNING("check 24G fields %d | %d\n",
 649                                     counter++, error);
 650         } else {
 651                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 652                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 653                 if (error)
 654                         IWL_WARNING("check 52 fields %d | %d\n",
 655                                     counter++, error);
 656                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 657                 if (error)
 658                         IWL_WARNING("check 52 CCK %d | %d\n",
 659                                     counter++, error);
 660         }
 661         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 662         if (error)
 663                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 664
 665         /* make sure basic rates 6Mbps and 1Mbps are supported */
 666         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 667                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 668         if (error)
 669                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 670
 671         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 672         if (error)
 673                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 674
 675         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 676                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 677         if (error)
 678                 IWL_WARNING("check CCK and short slot %d | %d\n",
 679                             counter++, error);
 680
 681         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 682                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 683         if (error)
 684                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 685                             counter++, error);
 686
 687         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 688                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 689         if (error)
 690                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 691                             counter++, error);
 692
 693         if (error)
 694                 IWL_WARNING("Tuning to channel %d\n",
 695                             le16_to_cpu(rxon->channel));
 696
 697         if (error) {
 698                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 699                 return -1;
 700         }
 701         return 0;
 702 }
 703
 704 /**
 705  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 706  * @priv: staging_rxon is compared to active_rxon
 707  *
 708  * If the RXON structure is changing enough to require a new tune,
 709  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 710  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 711  */
 712 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 713 {
 714
 715         /* These items are only settable from the full RXON command */
 716         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 717             compare_ether_addr(priv->staging_rxon.bssid_addr,
 718                                priv->active_rxon.bssid_addr) ||
 719             compare_ether_addr(priv->staging_rxon.node_addr,
 720                                priv->active_rxon.node_addr) ||
 721             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 722                                priv->active_rxon.wlap_bssid_addr) ||
 723             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 724             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 725             (priv->staging_rxon.air_propagation !=
 726              priv->active_rxon.air_propagation) ||
 727             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 728              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 729             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 730              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 731             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 732             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 733                 return 1;
 734
 735         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 736          * be updated with the RXON_ASSOC command -- however only some
 737          * flag transitions are allowed using RXON_ASSOC */
 738
 739         /* Check if we are not switching bands */
 740         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 741             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 742                 return 1;
 743
 744         /* Check if we are switching association toggle */
 745         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 746                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 747                 return 1;
 748
 749         return 0;
 750 }
 751
 752 /**
 753  * iwl4965_commit_rxon - commit staging_rxon to hardware
 754  *
 755  * The RXON command in staging_rxon is committed to the hardware and
 756  * the active_rxon structure is updated with the new data.  This
 757  * function correctly transitions out of the RXON_ASSOC_MSK state if
 758  * a HW tune is required based on the RXON structure changes.
 759  */
 760 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 761 {
 762         /* cast away the const for active_rxon in this function */
 763         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 764         DECLARE_MAC_BUF(mac);
 765         int rc = 0;
 766
 767         if (!iwl_is_alive(priv))
 768                 return -1;
 769
 770         /* always get timestamp with Rx frame */
 771         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 772
 773         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 774         if (rc) {
 775                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 776                 return -EINVAL;
 777         }
 778
 779         /* If we don't need to send a full RXON, we can use
 780          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 781          * and other flags for the current radio configuration. */
 782         if (!iwl4965_full_rxon_required(priv)) {
 783                 rc = iwl_send_rxon_assoc(priv);
 784                 if (rc) {
 785                         IWL_ERROR("Error setting RXON_ASSOC "
 786                                   "configuration (%d).\n", rc);
 787                         return rc;
 788                 }
 789
 790                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 791
 792                 return 0;
 793         }
 794
 795         /* station table will be cleared */
 796         priv->assoc_station_added = 0;
 797
 798 #ifdef CONFIG_IWL4965_SENSITIVITY
 799         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
 800         if (!priv->error_recovering)
 801                 priv->start_calib = 0;
 802
 803         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
 804 #endif /* CONFIG_IWL4965_SENSITIVITY */
 805
 806         /* If we are currently associated and the new config requires
 807          * an RXON_ASSOC and the new config wants the associated mask enabled,
 808          * we must clear the associated from the active configuration
 809          * before we apply the new config */
 810         if (iwl_is_associated(priv) &&
 811             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 812                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 813                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 814
 815                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 816                                       sizeof(struct iwl4965_rxon_cmd),
 817                                       &priv->active_rxon);
 818
 819                 /* If the mask clearing failed then we set
 820                  * active_rxon back to what it was previously */
 821                 if (rc) {
 822                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 823                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 824                                   "configuration (%d).\n", rc);
 825                         return rc;
 826                 }
 827         }
 828
 829         IWL_DEBUG_INFO("Sending RXON\n"
 830                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 831                        "* channel = %d\n"
 832                        "* bssid = %s\n",
 833                        ((priv->staging_rxon.filter_flags &
 834                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 835                        le16_to_cpu(priv->staging_rxon.channel),
 836                        print_mac(mac, priv->staging_rxon.bssid_addr));
 837
 838         iwl4965_set_rxon_hwcrypto(priv, priv->cfg->mod_params->hw_crypto);
 839         /* Apply the new configuration */
 840         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 841                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
 842         if (rc) {
 843                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 844                 return rc;
 845         }
 846
 847         iwlcore_clear_stations_table(priv);
 848
 849 #ifdef CONFIG_IWL4965_SENSITIVITY
 850         if (!priv->error_recovering)
 851                 priv->start_calib = 0;
 852
 853         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
 854         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
 855 #endif /* CONFIG_IWL4965_SENSITIVITY */
 856
 857         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 858
 859         /* If we issue a new RXON command which required a tune then we must
 860          * send a new TXPOWER command or we won't be able to Tx any frames */
 861         rc = iwl4965_hw_reg_send_txpower(priv);
 862         if (rc) {
 863                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 864                 return rc;
 865         }
 866
 867         /* Add the broadcast address so we can send broadcast frames */
 868         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
 869             IWL_INVALID_STATION) {
 870                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 871                 return -EIO;
 872         }
 873
 874         /* If we have set the ASSOC_MSK and we are in BSS mode then
 875          * add the IWL_AP_ID to the station rate table */
 876         if (iwl_is_associated(priv) &&
 877             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 878                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 879                     == IWL_INVALID_STATION) {
 880                         IWL_ERROR("Error adding AP address for transmit.\n");
 881                         return -EIO;
 882                 }
 883                 priv->assoc_station_added = 1;
 884                 if (priv->default_wep_key &&
 885                     iwl_send_static_wepkey_cmd(priv, 0))
 886                         IWL_ERROR("Could not send WEP static key.\n");
 887         }
 888
 889         return 0;
 890 }
 891
 892 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 893 {
 894         struct iwl4965_bt_cmd bt_cmd = {
 895                 .flags = 3,
 896                 .lead_time = 0xAA,
 897                 .max_kill = 1,
 898                 .kill_ack_mask = 0,
 899                 .kill_cts_mask = 0,
 900         };
 901
 902         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 903                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 904 }
 905
 906 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
 907 {
 908         int rc = 0;
 909         struct iwl4965_rx_packet *res;
 910         struct iwl_host_cmd cmd = {
 911                 .id = REPLY_SCAN_ABORT_CMD,
 912                 .meta.flags = CMD_WANT_SKB,
 913         };
 914
 915         /* If there isn't a scan actively going on in the hardware
 916          * then we are in between scan bands and not actually
 917          * actively scanning, so don't send the abort command */
 918         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 919                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 920                 return 0;
 921         }
 922
 923         rc = iwl_send_cmd_sync(priv, &cmd);
 924         if (rc) {
 925                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 926                 return rc;
 927         }
 928
 929         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 930         if (res->u.status != CAN_ABORT_STATUS) {
 931                 /* The scan abort will return 1 for success or
 932                  * 2 for "failure".  A failure condition can be
 933                  * due to simply not being in an active scan which
 934                  * can occur if we send the scan abort before we
 935                  * the microcode has notified us that a scan is
 936                  * completed. */
 937                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 938                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 939                 clear_bit(STATUS_SCAN_HW, &priv->status);
 940         }
 941
 942         dev_kfree_skb_any(cmd.meta.u.skb);
 943
 944         return rc;
 945 }
 946
 947 static int iwl4965_card_state_sync_callback(struct iwl_priv *priv,
 948                                         struct iwl_cmd *cmd,
 949                                         struct sk_buff *skb)
 950 {
 951         return 1;
 952 }
 953
 954 /*
 955  * CARD_STATE_CMD
 956  *
 957  * Use: Sets the device's internal card state to enable, disable, or halt
 958  *
 959  * When in the 'enable' state the card operates as normal.
 960  * When in the 'disable' state, the card enters into a low power mode.
 961  * When in the 'halt' state, the card is shut down and must be fully
 962  * restarted to come back on.
 963  */
 964 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
 965 {
 966         struct iwl_host_cmd cmd = {
 967                 .id = REPLY_CARD_STATE_CMD,
 968                 .len = sizeof(u32),
 969                 .data = &flags,
 970                 .meta.flags = meta_flag,
 971         };
 972
 973         if (meta_flag & CMD_ASYNC)
 974                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
 975
 976         return iwl_send_cmd(priv, &cmd);
 977 }
 978
 979 static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
 980                                      struct iwl_cmd *cmd, struct sk_buff *skb)
 981 {
 982         struct iwl4965_rx_packet *res = NULL;
 983
 984         if (!skb) {
 985                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
 986                 return 1;
 987         }
 988
 989         res = (struct iwl4965_rx_packet *)skb->data;
 990         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 991                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 992                           res->hdr.flags);
 993                 return 1;
 994         }
 995
 996         switch (res->u.add_sta.status) {
 997         case ADD_STA_SUCCESS_MSK:
 998                 break;
 999         default:
1000                 break;
1001         }
1002
1003         /* We didn't cache the SKB; let the caller free it */
1004         return 1;
1005 }
1006
1007 int iwl4965_send_add_station(struct iwl_priv *priv,
1008                          struct iwl4965_addsta_cmd *sta, u8 flags)
1009 {
1010         struct iwl4965_rx_packet *res = NULL;
1011         int rc = 0;
1012         struct iwl_host_cmd cmd = {
1013                 .id = REPLY_ADD_STA,
1014                 .len = sizeof(struct iwl4965_addsta_cmd),
1015                 .meta.flags = flags,
1016                 .data = sta,
1017         };
1018
1019         if (flags & CMD_ASYNC)
1020                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1021         else
1022                 cmd.meta.flags |= CMD_WANT_SKB;
1023
1024         rc = iwl_send_cmd(priv, &cmd);
1025
1026         if (rc || (flags & CMD_ASYNC))
1027                 return rc;
1028
1029         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1030         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1031                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1032                           res->hdr.flags);
1033                 rc = -EIO;
1034         }
1035
1036         if (rc == 0) {
1037                 switch (res->u.add_sta.status) {
1038                 case ADD_STA_SUCCESS_MSK:
1039                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1040                         break;
1041                 default:
1042                         rc = -EIO;
1043                         IWL_WARNING("REPLY_ADD_STA failed\n");
1044                         break;
1045                 }
1046         }
1047
1048         priv->alloc_rxb_skb--;
1049         dev_kfree_skb_any(cmd.meta.u.skb);
1050
1051         return rc;
1052 }
1053
1054 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1055 {
1056         struct list_head *element;
1057
1058         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1059                        priv->frames_count);
1060
1061         while (!list_empty(&priv->free_frames)) {
1062                 element = priv->free_frames.next;
1063                 list_del(element);
1064                 kfree(list_entry(element, struct iwl4965_frame, list));
1065                 priv->frames_count--;
1066         }
1067
1068         if (priv->frames_count) {
1069                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1070                             priv->frames_count);
1071                 priv->frames_count = 0;
1072         }
1073 }
1074
1075 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1076 {
1077         struct iwl4965_frame *frame;
1078         struct list_head *element;
1079         if (list_empty(&priv->free_frames)) {
1080                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1081                 if (!frame) {
1082                         IWL_ERROR("Could not allocate frame!\n");
1083                         return NULL;
1084                 }
1085
1086                 priv->frames_count++;
1087                 return frame;
1088         }
1089
1090         element = priv->free_frames.next;
1091         list_del(element);
1092         return list_entry(element, struct iwl4965_frame, list);
1093 }
1094
1095 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1096 {
1097         memset(frame, 0, sizeof(*frame));
1098         list_add(&frame->list, &priv->free_frames);
1099 }
1100
1101 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1102                                 struct ieee80211_hdr *hdr,
1103                                 const u8 *dest, int left)
1104 {
1105
1106         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1107             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1108              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1109                 return 0;
1110
1111         if (priv->ibss_beacon->len > left)
1112                 return 0;
1113
1114         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1115
1116         return priv->ibss_beacon->len;
1117 }
1118
1119 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1120 {
1121         u8 i;
1122
1123         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1124              i = iwl4965_rates[i].next_ieee) {
1125                 if (rate_mask & (1 << i))
1126                         return iwl4965_rates[i].plcp;
1127         }
1128
1129         return IWL_RATE_INVALID;
1130 }
1131
1132 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1133 {
1134         struct iwl4965_frame *frame;
1135         unsigned int frame_size;
1136         int rc;
1137         u8 rate;
1138
1139         frame = iwl4965_get_free_frame(priv);
1140
1141         if (!frame) {
1142                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1143                           "command.\n");
1144                 return -ENOMEM;
1145         }
1146
1147         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1148                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1149                                                 0xFF0);
1150                 if (rate == IWL_INVALID_RATE)
1151                         rate = IWL_RATE_6M_PLCP;
1152         } else {
1153                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1154                 if (rate == IWL_INVALID_RATE)
1155                         rate = IWL_RATE_1M_PLCP;
1156         }
1157
1158         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1159
1160         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1161                               &frame->u.cmd[0]);
1162
1163         iwl4965_free_frame(priv, frame);
1164
1165         return rc;
1166 }
1167
1168 /******************************************************************************
1169  *
1170  * Misc. internal state and helper functions
1171  *
1172  ******************************************************************************/
1173
1174 static void iwl4965_unset_hw_params(struct iwl_priv *priv)
1175 {
1176         if (priv->shared_virt)
1177                 pci_free_consistent(priv->pci_dev,
1178                                     sizeof(struct iwl4965_shared),
1179                                     priv->shared_virt,
1180                                     priv->shared_phys);
1181 }
1182
1183 /**
1184  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1185  *
1186  * return : set the bit for each supported rate insert in ie
1187  */
1188 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1189                                     u16 basic_rate, int *left)
1190 {
1191         u16 ret_rates = 0, bit;
1192         int i;
1193         u8 *cnt = ie;
1194         u8 *rates = ie + 1;
1195
1196         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1197                 if (bit & supported_rate) {
1198                         ret_rates |= bit;
1199                         rates[*cnt] = iwl4965_rates[i].ieee |
1200                                 ((bit & basic_rate) ? 0x80 : 0x00);
1201                         (*cnt)++;
1202                         (*left)--;
1203                         if ((*left <= 0) ||
1204                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1205                                 break;
1206                 }
1207         }
1208
1209         return ret_rates;
1210 }
1211
1212 /**
1213  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1214  */
1215 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1216                                   enum ieee80211_band band,
1217                                   struct ieee80211_mgmt *frame,
1218                                   int left, int is_direct)
1219 {
1220         int len = 0;
1221         u8 *pos = NULL;
1222         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1223 #ifdef CONFIG_IWL4965_HT
1224         const struct ieee80211_supported_band *sband =
1225                                                 iwl4965_get_hw_mode(priv, band);
1226 #endif /* CONFIG_IWL4965_HT */
1227
1228         /* Make sure there is enough space for the probe request,
1229          * two mandatory IEs and the data */
1230         left -= 24;
1231         if (left < 0)
1232                 return 0;
1233         len += 24;
1234
1235         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1236         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1237         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1238         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1239         frame->seq_ctrl = 0;
1240
1241         /* fill in our indirect SSID IE */
1242         /* ...next IE... */
1243
1244         left -= 2;
1245         if (left < 0)
1246                 return 0;
1247         len += 2;
1248         pos = &(frame->u.probe_req.variable[0]);
1249         *pos++ = WLAN_EID_SSID;
1250         *pos++ = 0;
1251
1252         /* fill in our direct SSID IE... */
1253         if (is_direct) {
1254                 /* ...next IE... */
1255                 left -= 2 + priv->essid_len;
1256                 if (left < 0)
1257                         return 0;
1258                 /* ... fill it in... */
1259                 *pos++ = WLAN_EID_SSID;
1260                 *pos++ = priv->essid_len;
1261                 memcpy(pos, priv->essid, priv->essid_len);
1262                 pos += priv->essid_len;
1263                 len += 2 + priv->essid_len;
1264         }
1265
1266         /* fill in supported rate */
1267         /* ...next IE... */
1268         left -= 2;
1269         if (left < 0)
1270                 return 0;
1271
1272         /* ... fill it in... */
1273         *pos++ = WLAN_EID_SUPP_RATES;
1274         *pos = 0;
1275
1276         /* exclude 60M rate */
1277         active_rates = priv->rates_mask;
1278         active_rates &= ~IWL_RATE_60M_MASK;
1279
1280         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1281
1282         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1283         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1284                         active_rate_basic, &left);
1285         active_rates &= ~ret_rates;
1286
1287         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1288                                  active_rate_basic, &left);
1289         active_rates &= ~ret_rates;
1290
1291         len += 2 + *pos;
1292         pos += (*pos) + 1;
1293         if (active_rates == 0)
1294                 goto fill_end;
1295
1296         /* fill in supported extended rate */
1297         /* ...next IE... */
1298         left -= 2;
1299         if (left < 0)
1300                 return 0;
1301         /* ... fill it in... */
1302         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1303         *pos = 0;
1304         iwl4965_supported_rate_to_ie(pos, active_rates,
1305                                  active_rate_basic, &left);
1306         if (*pos > 0)
1307                 len += 2 + *pos;
1308
1309 #ifdef CONFIG_IWL4965_HT
1310         if (sband && sband->ht_info.ht_supported) {
1311                 struct ieee80211_ht_cap *ht_cap;
1312                 pos += (*pos) + 1;
1313                 *pos++ = WLAN_EID_HT_CAPABILITY;
1314                 *pos++ = sizeof(struct ieee80211_ht_cap);
1315                 ht_cap = (struct ieee80211_ht_cap *)pos;
1316                 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1317                 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1318                 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1319                                             IEEE80211_HT_CAP_AMPDU_FACTOR) |
1320                                             ((sband->ht_info.ampdu_density << 2) &
1321                                             IEEE80211_HT_CAP_AMPDU_DENSITY);
1322                 len += 2 + sizeof(struct ieee80211_ht_cap);
1323         }
1324 #endif  /*CONFIG_IWL4965_HT */
1325
1326  fill_end:
1327         return (u16)len;
1328 }
1329
1330 /*
1331  * QoS  support
1332 */
1333 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1334                                        struct iwl4965_qosparam_cmd *qos)
1335 {
1336
1337         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1338                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1339 }
1340
1341 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1342 {
1343         unsigned long flags;
1344
1345         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1346                 return;
1347
1348         if (!priv->qos_data.qos_enable)
1349                 return;
1350
1351         spin_lock_irqsave(&priv->lock, flags);
1352         priv->qos_data.def_qos_parm.qos_flags = 0;
1353
1354         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1355             !priv->qos_data.qos_cap.q_AP.txop_request)
1356                 priv->qos_data.def_qos_parm.qos_flags |=
1357                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1358         if (priv->qos_data.qos_active)
1359                 priv->qos_data.def_qos_parm.qos_flags |=
1360                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1361
1362 #ifdef CONFIG_IWL4965_HT
1363         if (priv->current_ht_config.is_ht)
1364                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1365 #endif /* CONFIG_IWL4965_HT */
1366
1367         spin_unlock_irqrestore(&priv->lock, flags);
1368
1369         if (force || iwl_is_associated(priv)) {
1370                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1371                                 priv->qos_data.qos_active,
1372                                 priv->qos_data.def_qos_parm.qos_flags);
1373
1374                 iwl4965_send_qos_params_command(priv,
1375                                 &(priv->qos_data.def_qos_parm));
1376         }
1377 }
1378
1379 /*
1380  * Power management (not Tx power!) functions
1381  */
1382 #define MSEC_TO_USEC 1024
1383
1384 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1385 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1386 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1387 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1388                                      __constant_cpu_to_le32(X1), \
1389                                      __constant_cpu_to_le32(X2), \
1390                                      __constant_cpu_to_le32(X3), \
1391                                      __constant_cpu_to_le32(X4)}
1392
1393
1394 /* default power management (not Tx power) table values */
1395 /* for tim  0-10 */
1396 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1397         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1398         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1399         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1400         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1401         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1402         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1403 };
1404
1405 /* for tim > 10 */
1406 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1407         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1408         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1409                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1410         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1411                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1412         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1413                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1414         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1415         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1416                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1417 };
1418
1419 int iwl4965_power_init_handle(struct iwl_priv *priv)
1420 {
1421         int rc = 0, i;
1422         struct iwl4965_power_mgr *pow_data;
1423         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1424         u16 pci_pm;
1425
1426         IWL_DEBUG_POWER("Initialize power \n");
1427
1428         pow_data = &(priv->power_data);
1429
1430         memset(pow_data, 0, sizeof(*pow_data));
1431
1432         pow_data->active_index = IWL_POWER_RANGE_0;
1433         pow_data->dtim_val = 0xffff;
1434
1435         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1436         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1437
1438         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1439         if (rc != 0)
1440                 return 0;
1441         else {
1442                 struct iwl4965_powertable_cmd *cmd;
1443
1444                 IWL_DEBUG_POWER("adjust power command flags\n");
1445
1446                 for (i = 0; i < IWL_POWER_AC; i++) {
1447                         cmd = &pow_data->pwr_range_0[i].cmd;
1448
1449                         if (pci_pm & 0x1)
1450                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1451                         else
1452                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1453                 }
1454         }
1455         return rc;
1456 }
1457
1458 static int iwl4965_update_power_cmd(struct iwl_priv *priv,
1459                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
1460 {
1461         int rc = 0, i;
1462         u8 skip;
1463         u32 max_sleep = 0;
1464         struct iwl4965_power_vec_entry *range;
1465         u8 period = 0;
1466         struct iwl4965_power_mgr *pow_data;
1467
1468         if (mode > IWL_POWER_INDEX_5) {
1469                 IWL_DEBUG_POWER("Error invalid power mode \n");
1470                 return -1;
1471         }
1472         pow_data = &(priv->power_data);
1473
1474         if (pow_data->active_index == IWL_POWER_RANGE_0)
1475                 range = &pow_data->pwr_range_0[0];
1476         else
1477                 range = &pow_data->pwr_range_1[1];
1478
1479         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1480
1481 #ifdef IWL_MAC80211_DISABLE
1482         if (priv->assoc_network != NULL) {
1483                 unsigned long flags;
1484
1485                 period = priv->assoc_network->tim.tim_period;
1486         }
1487 #endif  /*IWL_MAC80211_DISABLE */
1488         skip = range[mode].no_dtim;
1489
1490         if (period == 0) {
1491                 period = 1;
1492                 skip = 0;
1493         }
1494
1495         if (skip == 0) {
1496                 max_sleep = period;
1497                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1498         } else {
1499                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1500                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1501                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1502         }
1503
1504         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1505                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1506                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1507         }
1508
1509         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1510         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1511         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1512         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1513                         le32_to_cpu(cmd->sleep_interval[0]),
1514                         le32_to_cpu(cmd->sleep_interval[1]),
1515                         le32_to_cpu(cmd->sleep_interval[2]),
1516                         le32_to_cpu(cmd->sleep_interval[3]),
1517                         le32_to_cpu(cmd->sleep_interval[4]));
1518
1519         return rc;
1520 }
1521
1522 static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
1523 {
1524         u32 uninitialized_var(final_mode);
1525         int rc;
1526         struct iwl4965_powertable_cmd cmd;
1527
1528         /* If on battery, set to 3,
1529          * if plugged into AC power, set to CAM ("continuously aware mode"),
1530          * else user level */
1531         switch (mode) {
1532         case IWL_POWER_BATTERY:
1533                 final_mode = IWL_POWER_INDEX_3;
1534                 break;
1535         case IWL_POWER_AC:
1536                 final_mode = IWL_POWER_MODE_CAM;
1537                 break;
1538         default:
1539                 final_mode = mode;
1540                 break;
1541         }
1542
1543         cmd.keep_alive_beacons = 0;
1544
1545         iwl4965_update_power_cmd(priv, &cmd, final_mode);
1546
1547         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1548
1549         if (final_mode == IWL_POWER_MODE_CAM)
1550                 clear_bit(STATUS_POWER_PMI, &priv->status);
1551         else
1552                 set_bit(STATUS_POWER_PMI, &priv->status);
1553
1554         return rc;
1555 }
1556
1557 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1558 {
1559         /* Filter incoming packets to determine if they are targeted toward
1560          * this network, discarding packets coming from ourselves */
1561         switch (priv->iw_mode) {
1562         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1563                 /* packets from our adapter are dropped (echo) */
1564                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1565                         return 0;
1566                 /* {broad,multi}cast packets to our IBSS go through */
1567                 if (is_multicast_ether_addr(header->addr1))
1568                         return !compare_ether_addr(header->addr3, priv->bssid);
1569                 /* packets to our adapter go through */
1570                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1571         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1572                 /* packets from our adapter are dropped (echo) */
1573                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1574                         return 0;
1575                 /* {broad,multi}cast packets to our BSS go through */
1576                 if (is_multicast_ether_addr(header->addr1))
1577                         return !compare_ether_addr(header->addr2, priv->bssid);
1578                 /* packets to our adapter go through */
1579                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1580         default:
1581                 break;
1582         }
1583
1584         return 1;
1585 }
1586
1587 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1588
1589 static const char *iwl4965_get_tx_fail_reason(u32 status)
1590 {
1591         switch (status & TX_STATUS_MSK) {
1592         case TX_STATUS_SUCCESS:
1593                 return "SUCCESS";
1594                 TX_STATUS_ENTRY(SHORT_LIMIT);
1595                 TX_STATUS_ENTRY(LONG_LIMIT);
1596                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1597                 TX_STATUS_ENTRY(MGMNT_ABORT);
1598                 TX_STATUS_ENTRY(NEXT_FRAG);
1599                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1600                 TX_STATUS_ENTRY(DEST_PS);
1601                 TX_STATUS_ENTRY(ABORTED);
1602                 TX_STATUS_ENTRY(BT_RETRY);
1603                 TX_STATUS_ENTRY(STA_INVALID);
1604                 TX_STATUS_ENTRY(FRAG_DROPPED);
1605                 TX_STATUS_ENTRY(TID_DISABLE);
1606                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1607                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1608                 TX_STATUS_ENTRY(TX_LOCKED);
1609                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1610         }
1611
1612         return "UNKNOWN";
1613 }
1614
1615 /**
1616  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1617  *
1618  * NOTE: priv->mutex is not required before calling this function
1619  */
1620 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1621 {
1622         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1623                 clear_bit(STATUS_SCANNING, &priv->status);
1624                 return 0;
1625         }
1626
1627         if (test_bit(STATUS_SCANNING, &priv->status)) {
1628                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1629                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1630                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1631                         queue_work(priv->workqueue, &priv->abort_scan);
1632
1633                 } else
1634                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1635
1636                 return test_bit(STATUS_SCANNING, &priv->status);
1637         }
1638
1639         return 0;
1640 }
1641
1642 /**
1643  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1644  * @ms: amount of time to wait (in milliseconds) for scan to abort
1645  *
1646  * NOTE: priv->mutex must be held before calling this function
1647  */
1648 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1649 {
1650         unsigned long now = jiffies;
1651         int ret;
1652
1653         ret = iwl4965_scan_cancel(priv);
1654         if (ret && ms) {
1655                 mutex_unlock(&priv->mutex);
1656                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1657                                 test_bit(STATUS_SCANNING, &priv->status))
1658                         msleep(1);
1659                 mutex_lock(&priv->mutex);
1660
1661                 return test_bit(STATUS_SCANNING, &priv->status);
1662         }
1663
1664         return ret;
1665 }
1666
1667 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1668 {
1669         /* Reset ieee stats */
1670
1671         /* We don't reset the net_device_stats (ieee->stats) on
1672          * re-association */
1673
1674         priv->last_seq_num = -1;
1675         priv->last_frag_num = -1;
1676         priv->last_packet_time = 0;
1677
1678         iwl4965_scan_cancel(priv);
1679 }
1680
1681 #define MAX_UCODE_BEACON_INTERVAL       4096
1682 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1683
1684 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1685 {
1686         u16 new_val = 0;
1687         u16 beacon_factor = 0;
1688
1689         beacon_factor =
1690             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1691                 / MAX_UCODE_BEACON_INTERVAL;
1692         new_val = beacon_val / beacon_factor;
1693
1694         return cpu_to_le16(new_val);
1695 }
1696
1697 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1698 {
1699         u64 interval_tm_unit;
1700         u64 tsf, result;
1701         unsigned long flags;
1702         struct ieee80211_conf *conf = NULL;
1703         u16 beacon_int = 0;
1704
1705         conf = ieee80211_get_hw_conf(priv->hw);
1706
1707         spin_lock_irqsave(&priv->lock, flags);
1708         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1709         priv->rxon_timing.timestamp.dw[0] =
1710                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1711
1712         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1713
1714         tsf = priv->timestamp;
1715
1716         beacon_int = priv->beacon_int;
1717         spin_unlock_irqrestore(&priv->lock, flags);
1718
1719         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1720                 if (beacon_int == 0) {
1721                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1722                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1723                 } else {
1724                         priv->rxon_timing.beacon_interval =
1725                                 cpu_to_le16(beacon_int);
1726                         priv->rxon_timing.beacon_interval =
1727                             iwl4965_adjust_beacon_interval(
1728                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1729                 }
1730
1731                 priv->rxon_timing.atim_window = 0;
1732         } else {
1733                 priv->rxon_timing.beacon_interval =
1734                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1735                 /* TODO: we need to get atim_window from upper stack
1736                  * for now we set to 0 */
1737                 priv->rxon_timing.atim_window = 0;
1738         }
1739
1740         interval_tm_unit =
1741                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1742         result = do_div(tsf, interval_tm_unit);
1743         priv->rxon_timing.beacon_init_val =
1744             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1745
1746         IWL_DEBUG_ASSOC
1747             ("beacon interval %d beacon timer %d beacon tim %d\n",
1748                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1749                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1750                 le16_to_cpu(priv->rxon_timing.atim_window));
1751 }
1752
1753 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1754 {
1755         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1756                 IWL_ERROR("APs don't scan.\n");
1757                 return 0;
1758         }
1759
1760         if (!iwl_is_ready_rf(priv)) {
1761                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1762                 return -EIO;
1763         }
1764
1765         if (test_bit(STATUS_SCANNING, &priv->status)) {
1766                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1767                 return -EAGAIN;
1768         }
1769
1770         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1771                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1772                                "Queuing.\n");
1773                 return -EAGAIN;
1774         }
1775
1776         IWL_DEBUG_INFO("Starting scan...\n");
1777         priv->scan_bands = 2;
1778         set_bit(STATUS_SCANNING, &priv->status);
1779         priv->scan_start = jiffies;
1780         priv->scan_pass_start = priv->scan_start;
1781
1782         queue_work(priv->workqueue, &priv->request_scan);
1783
1784         return 0;
1785 }
1786
1787
1788 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1789                                           enum ieee80211_band band)
1790 {
1791         if (band == IEEE80211_BAND_5GHZ) {
1792                 priv->staging_rxon.flags &=
1793                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1794                       | RXON_FLG_CCK_MSK);
1795                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1796         } else {
1797                 /* Copied from iwl4965_post_associate() */
1798                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1799                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1800                 else
1801                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1802
1803                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1804                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1805
1806                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1807                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1808                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1809         }
1810 }
1811
1812 /*
1813  * initialize rxon structure with default values from eeprom
1814  */
1815 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1816 {
1817         const struct iwl_channel_info *ch_info;
1818
1819         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1820
1821         switch (priv->iw_mode) {
1822         case IEEE80211_IF_TYPE_AP:
1823                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1824                 break;
1825
1826         case IEEE80211_IF_TYPE_STA:
1827                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1828                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1829                 break;
1830
1831         case IEEE80211_IF_TYPE_IBSS:
1832                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1833                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1834                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1835                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1836                 break;
1837
1838         case IEEE80211_IF_TYPE_MNTR:
1839                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1840                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1841                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1842                 break;
1843         default:
1844                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1845                 break;
1846         }
1847
1848 #if 0
1849         /* TODO:  Figure out when short_preamble would be set and cache from
1850          * that */
1851         if (!hw_to_local(priv->hw)->short_preamble)
1852                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1853         else
1854                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1855 #endif
1856
1857         ch_info = iwl_get_channel_info(priv, priv->band,
1858                                        le16_to_cpu(priv->staging_rxon.channel));
1859
1860         if (!ch_info)
1861                 ch_info = &priv->channel_info[0];
1862
1863         /*
1864          * in some case A channels are all non IBSS
1865          * in this case force B/G channel
1866          */
1867         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1868             !(is_channel_ibss(ch_info)))
1869                 ch_info = &priv->channel_info[0];
1870
1871         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1872         priv->band = ch_info->band;
1873
1874         iwl4965_set_flags_for_phymode(priv, priv->band);
1875
1876         priv->staging_rxon.ofdm_basic_rates =
1877             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1878         priv->staging_rxon.cck_basic_rates =
1879             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1880
1881         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1882                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1883         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1884         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1885         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1886         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1887         iwl4965_set_rxon_chain(priv);
1888 }
1889
1890 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1891 {
1892         if (mode == IEEE80211_IF_TYPE_IBSS) {
1893                 const struct iwl_channel_info *ch_info;
1894
1895                 ch_info = iwl_get_channel_info(priv,
1896                         priv->band,
1897                         le16_to_cpu(priv->staging_rxon.channel));
1898
1899                 if (!ch_info || !is_channel_ibss(ch_info)) {
1900                         IWL_ERROR("channel %d not IBSS channel\n",
1901                                   le16_to_cpu(priv->staging_rxon.channel));
1902                         return -EINVAL;
1903                 }
1904         }
1905
1906         priv->iw_mode = mode;
1907
1908         iwl4965_connection_init_rx_config(priv);
1909         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1910
1911         iwlcore_clear_stations_table(priv);
1912
1913         /* dont commit rxon if rf-kill is on*/
1914         if (!iwl_is_ready_rf(priv))
1915                 return -EAGAIN;
1916
1917         cancel_delayed_work(&priv->scan_check);
1918         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1919                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1920                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1921                 return -EAGAIN;
1922         }
1923
1924         iwl4965_commit_rxon(priv);
1925
1926         return 0;
1927 }
1928
1929 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1930                                       struct ieee80211_tx_control *ctl,
1931                                       struct iwl_cmd *cmd,
1932                                       struct sk_buff *skb_frag,
1933                                       int sta_id)
1934 {
1935         struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1936         struct iwl_wep_key *wepkey;
1937         int keyidx = 0;
1938
1939         BUG_ON(ctl->key_idx > 3);
1940
1941         switch (keyinfo->alg) {
1942         case ALG_CCMP:
1943                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1944                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1945                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1946                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1947                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1948                 break;
1949
1950         case ALG_TKIP:
1951                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1952                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1953                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1954                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1955                 break;
1956
1957         case ALG_WEP:
1958                 wepkey = &priv->wep_keys[ctl->key_idx];
1959                 cmd->cmd.tx.sec_ctl = 0;
1960                 if (priv->default_wep_key) {
1961                         /* the WEP key was sent as static */
1962                         keyidx = ctl->key_idx;
1963                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1964                                                         wepkey->key_size);
1965                         if (wepkey->key_size == WEP_KEY_LEN_128)
1966                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1967                 } else {
1968                         /* the WEP key was sent as dynamic */
1969                         keyidx = keyinfo->keyidx;
1970                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1971                                                         keyinfo->keylen);
1972                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1973                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1974                 }
1975
1976                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1977                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1978
1979                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1980                              "with key %d\n", keyidx);
1981                 break;
1982
1983         default:
1984                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1985                 break;
1986         }
1987 }
1988
1989 /*
1990  * handle build REPLY_TX command notification.
1991  */
1992 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1993                                   struct iwl_cmd *cmd,
1994                                   struct ieee80211_tx_control *ctrl,
1995                                   struct ieee80211_hdr *hdr,
1996                                   int is_unicast, u8 std_id)
1997 {
1998         __le16 *qc;
1999         u16 fc = le16_to_cpu(hdr->frame_control);
2000         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2001
2002         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2003         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2004                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2005                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2006                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2007                 if (ieee80211_is_probe_response(fc) &&
2008                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2009                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2010         } else {
2011                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2012                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2013         }
2014
2015         if (ieee80211_is_back_request(fc))
2016                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2017
2018
2019         cmd->cmd.tx.sta_id = std_id;
2020         if (ieee80211_get_morefrag(hdr))
2021                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2022
2023         qc = ieee80211_get_qos_ctrl(hdr);
2024         if (qc) {
2025                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2026                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2027         } else
2028                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2029
2030         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2031                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2032                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2033         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2034                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2035                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2036         }
2037
2038         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2039                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2040
2041         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2042         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2043                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2044                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2045                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2046                 else
2047                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2048         } else {
2049                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2050         }
2051
2052         cmd->cmd.tx.driver_txop = 0;
2053         cmd->cmd.tx.tx_flags = tx_flags;
2054         cmd->cmd.tx.next_frame_len = 0;
2055 }
2056 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2057 {
2058         /* 0 - mgmt, 1 - cnt, 2 - data */
2059         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2060         priv->tx_stats[idx].cnt++;
2061         priv->tx_stats[idx].bytes += len;
2062 }
2063 /**
2064  * iwl4965_get_sta_id - Find station's index within station table
2065  *
2066  * If new IBSS station, create new entry in station table
2067  */
2068 static int iwl4965_get_sta_id(struct iwl_priv *priv,
2069                                 struct ieee80211_hdr *hdr)
2070 {
2071         int sta_id;
2072         u16 fc = le16_to_cpu(hdr->frame_control);
2073         DECLARE_MAC_BUF(mac);
2074
2075         /* If this frame is broadcast or management, use broadcast station id */
2076         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2077             is_multicast_ether_addr(hdr->addr1))
2078                 return priv->hw_params.bcast_sta_id;
2079
2080         switch (priv->iw_mode) {
2081
2082         /* If we are a client station in a BSS network, use the special
2083          * AP station entry (that's the only station we communicate with) */
2084         case IEEE80211_IF_TYPE_STA:
2085                 return IWL_AP_ID;
2086
2087         /* If we are an AP, then find the station, or use BCAST */
2088         case IEEE80211_IF_TYPE_AP:
2089                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2090                 if (sta_id != IWL_INVALID_STATION)
2091                         return sta_id;
2092                 return priv->hw_params.bcast_sta_id;
2093
2094         /* If this frame is going out to an IBSS network, find the station,
2095          * or create a new station table entry */
2096         case IEEE80211_IF_TYPE_IBSS:
2097                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2098                 if (sta_id != IWL_INVALID_STATION)
2099                         return sta_id;
2100
2101                 /* Create new station table entry */
2102                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2103                                                    0, CMD_ASYNC, NULL);
2104
2105                 if (sta_id != IWL_INVALID_STATION)
2106                         return sta_id;
2107
2108                 IWL_DEBUG_DROP("Station %s not in station map. "
2109                                "Defaulting to broadcast...\n",
2110                                print_mac(mac, hdr->addr1));
2111                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2112                 return priv->hw_params.bcast_sta_id;
2113
2114         default:
2115                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2116                 return priv->hw_params.bcast_sta_id;
2117         }
2118 }
2119
2120 /*
2121  * start REPLY_TX command process
2122  */
2123 static int iwl4965_tx_skb(struct iwl_priv *priv,
2124                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2125 {
2126         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2127         struct iwl4965_tfd_frame *tfd;
2128         u32 *control_flags;
2129         int txq_id = ctl->queue;
2130         struct iwl4965_tx_queue *txq = NULL;
2131         struct iwl4965_queue *q = NULL;
2132         dma_addr_t phys_addr;
2133         dma_addr_t txcmd_phys;
2134         dma_addr_t scratch_phys;
2135         struct iwl_cmd *out_cmd = NULL;
2136         u16 len, idx, len_org;
2137         u8 id, hdr_len, unicast;
2138         u8 sta_id;
2139         u16 seq_number = 0;
2140         u16 fc;
2141         __le16 *qc;
2142         u8 wait_write_ptr = 0;
2143         unsigned long flags;
2144         int rc;
2145
2146         spin_lock_irqsave(&priv->lock, flags);
2147         if (iwl_is_rfkill(priv)) {
2148                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2149                 goto drop_unlock;
2150         }
2151
2152         if (!priv->vif) {
2153                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2154                 goto drop_unlock;
2155         }
2156
2157         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2158                 IWL_ERROR("ERROR: No TX rate available.\n");
2159                 goto drop_unlock;
2160         }
2161
2162         unicast = !is_multicast_ether_addr(hdr->addr1);
2163         id = 0;
2164
2165         fc = le16_to_cpu(hdr->frame_control);
2166
2167 #ifdef CONFIG_IWLWIFI_DEBUG
2168         if (ieee80211_is_auth(fc))
2169                 IWL_DEBUG_TX("Sending AUTH frame\n");
2170         else if (ieee80211_is_assoc_request(fc))
2171                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2172         else if (ieee80211_is_reassoc_request(fc))
2173                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2174 #endif
2175
2176         /* drop all data frame if we are not associated */
2177         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2178            (!iwl_is_associated(priv) ||
2179             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2180             !priv->assoc_station_added)) {
2181                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2182                 goto drop_unlock;
2183         }
2184
2185         spin_unlock_irqrestore(&priv->lock, flags);
2186
2187         hdr_len = ieee80211_get_hdrlen(fc);
2188
2189         /* Find (or create) index into station table for destination station */
2190         sta_id = iwl4965_get_sta_id(priv, hdr);
2191         if (sta_id == IWL_INVALID_STATION) {
2192                 DECLARE_MAC_BUF(mac);
2193
2194                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2195                                print_mac(mac, hdr->addr1));
2196                 goto drop;
2197         }
2198
2199         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2200
2201         qc = ieee80211_get_qos_ctrl(hdr);
2202         if (qc) {
2203                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2204                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2205                                 IEEE80211_SCTL_SEQ;
2206                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2207                         (hdr->seq_ctrl &
2208                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2209                 seq_number += 0x10;
2210 #ifdef CONFIG_IWL4965_HT
2211                 /* aggregation is on for this <sta,tid> */
2212                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2213                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2214                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2215 #endif /* CONFIG_IWL4965_HT */
2216         }
2217
2218         /* Descriptor for chosen Tx queue */
2219         txq = &priv->txq[txq_id];
2220         q = &txq->q;
2221
2222         spin_lock_irqsave(&priv->lock, flags);
2223
2224         /* Set up first empty TFD within this queue's circular TFD buffer */
2225         tfd = &txq->bd[q->write_ptr];
2226         memset(tfd, 0, sizeof(*tfd));
2227         control_flags = (u32 *) tfd;
2228         idx = get_cmd_index(q, q->write_ptr, 0);
2229
2230         /* Set up driver data for this TFD */
2231         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2232         txq->txb[q->write_ptr].skb[0] = skb;
2233         memcpy(&(txq->txb[q->write_ptr].status.control),
2234                ctl, sizeof(struct ieee80211_tx_control));
2235
2236         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2237         out_cmd = &txq->cmd[idx];
2238         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2239         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2240
2241         /*
2242          * Set up the Tx-command (not MAC!) header.
2243          * Store the chosen Tx queue and TFD index within the sequence field;
2244          * after Tx, uCode's Tx response will return this value so driver can
2245          * locate the frame within the tx queue and do post-tx processing.
2246          */
2247         out_cmd->hdr.cmd = REPLY_TX;
2248         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2249                                 INDEX_TO_SEQ(q->write_ptr)));
2250
2251         /* Copy MAC header from skb into command buffer */
2252         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2253
2254         /*
2255          * Use the first empty entry in this queue's command buffer array
2256          * to contain the Tx command and MAC header concatenated together
2257          * (payload data will be in another buffer).
2258          * Size of this varies, due to varying MAC header length.
2259          * If end is not dword aligned, we'll have 2 extra bytes at the end
2260          * of the MAC header (device reads on dword boundaries).
2261          * We'll tell device about this padding later.
2262          */
2263         len = priv->hw_params.tx_cmd_len +
2264                 sizeof(struct iwl_cmd_header) + hdr_len;
2265
2266         len_org = len;
2267         len = (len + 3) & ~3;
2268
2269         if (len_org != len)
2270                 len_org = 1;
2271         else
2272                 len_org = 0;
2273
2274         /* Physical address of this Tx command's header (not MAC header!),
2275          * within command buffer array. */
2276         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2277                      offsetof(struct iwl_cmd, hdr);
2278
2279         /* Add buffer containing Tx command and MAC(!) header to TFD's
2280          * first entry */
2281         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2282
2283         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2284                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2285
2286         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2287          * if any (802.11 null frames have no payload). */
2288         len = skb->len - hdr_len;
2289         if (len) {
2290                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2291                                            len, PCI_DMA_TODEVICE);
2292                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2293         }
2294
2295         /* Tell 4965 about any 2-byte padding after MAC header */
2296         if (len_org)
2297                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2298
2299         /* Total # bytes to be transmitted */
2300         len = (u16)skb->len;
2301         out_cmd->cmd.tx.len = cpu_to_le16(len);
2302
2303         /* TODO need this for burst mode later on */
2304         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2305
2306         /* set is_hcca to 0; it probably will never be implemented */
2307         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2308
2309         iwl_update_tx_stats(priv, fc, len);
2310
2311         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2312                 offsetof(struct iwl4965_tx_cmd, scratch);
2313         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2314         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2315
2316         if (!ieee80211_get_morefrag(hdr)) {
2317                 txq->need_update = 1;
2318                 if (qc) {
2319                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2320                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2321                 }
2322         } else {
2323                 wait_write_ptr = 1;
2324                 txq->need_update = 0;
2325         }
2326
2327         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2328                            sizeof(out_cmd->cmd.tx));
2329
2330         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2331                            ieee80211_get_hdrlen(fc));
2332
2333         /* Set up entry for this TFD in Tx byte-count array */
2334         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2335
2336         /* Tell device the write index *just past* this latest filled TFD */
2337         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2338         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2339         spin_unlock_irqrestore(&priv->lock, flags);
2340
2341         if (rc)
2342                 return rc;
2343
2344         if ((iwl4965_queue_space(q) < q->high_mark)
2345             && priv->mac80211_registered) {
2346                 if (wait_write_ptr) {
2347                         spin_lock_irqsave(&priv->lock, flags);
2348                         txq->need_update = 1;
2349                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2350                         spin_unlock_irqrestore(&priv->lock, flags);
2351                 }
2352
2353                 ieee80211_stop_queue(priv->hw, ctl->queue);
2354         }
2355
2356         return 0;
2357
2358 drop_unlock:
2359         spin_unlock_irqrestore(&priv->lock, flags);
2360 drop:
2361         return -1;
2362 }
2363
2364 static void iwl4965_set_rate(struct iwl_priv *priv)
2365 {
2366         const struct ieee80211_supported_band *hw = NULL;
2367         struct ieee80211_rate *rate;
2368         int i;
2369
2370         hw = iwl4965_get_hw_mode(priv, priv->band);
2371         if (!hw) {
2372                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2373                 return;
2374         }
2375
2376         priv->active_rate = 0;
2377         priv->active_rate_basic = 0;
2378
2379         for (i = 0; i < hw->n_bitrates; i++) {
2380                 rate = &(hw->bitrates[i]);
2381                 if (rate->hw_value < IWL_RATE_COUNT)
2382                         priv->active_rate |= (1 << rate->hw_value);
2383         }
2384
2385         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2386                        priv->active_rate, priv->active_rate_basic);
2387
2388         /*
2389          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2390          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2391          * OFDM
2392          */
2393         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2394                 priv->staging_rxon.cck_basic_rates =
2395                     ((priv->active_rate_basic &
2396                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2397         else
2398                 priv->staging_rxon.cck_basic_rates =
2399                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2400
2401         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2402                 priv->staging_rxon.ofdm_basic_rates =
2403                     ((priv->active_rate_basic &
2404                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2405                       IWL_FIRST_OFDM_RATE) & 0xFF;
2406         else
2407                 priv->staging_rxon.ofdm_basic_rates =
2408                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2409 }
2410
2411 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2412 {
2413         unsigned long flags;
2414
2415         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2416                 return;
2417
2418         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2419                           disable_radio ? "OFF" : "ON");
2420
2421         if (disable_radio) {
2422                 iwl4965_scan_cancel(priv);
2423                 /* FIXME: This is a workaround for AP */
2424                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2425                         spin_lock_irqsave(&priv->lock, flags);
2426                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2427                                     CSR_UCODE_SW_BIT_RFKILL);
2428                         spin_unlock_irqrestore(&priv->lock, flags);
2429                         /* call the host command only if no hw rf-kill set */
2430                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2431                                 iwl4965_send_card_state(priv,
2432                                                         CARD_STATE_CMD_DISABLE,
2433                                                         0);
2434                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2435
2436                         /* make sure mac80211 stop sending Tx frame */
2437                         if (priv->mac80211_registered)
2438                                 ieee80211_stop_queues(priv->hw);
2439                 }
2440                 return;
2441         }
2442
2443         spin_lock_irqsave(&priv->lock, flags);
2444         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2445
2446         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2447         spin_unlock_irqrestore(&priv->lock, flags);
2448
2449         /* wake up ucode */
2450         msleep(10);
2451
2452         spin_lock_irqsave(&priv->lock, flags);
2453         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2454         if (!iwl_grab_nic_access(priv))
2455                 iwl_release_nic_access(priv);
2456         spin_unlock_irqrestore(&priv->lock, flags);
2457
2458         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2459                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2460                                   "disabled by HW switch\n");
2461                 return;
2462         }
2463
2464         queue_work(priv->workqueue, &priv->restart);
2465         return;
2466 }
2467
2468 void iwl4965_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2469                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2470 {
2471         u16 fc =
2472             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2473
2474         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2475                 return;
2476
2477         if (!(fc & IEEE80211_FCTL_PROTECTED))
2478                 return;
2479
2480         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2481         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2482         case RX_RES_STATUS_SEC_TYPE_TKIP:
2483                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2484                  * Decryption will be done in SW. */
2485                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2486                     RX_RES_STATUS_BAD_KEY_TTAK)
2487                         break;
2488
2489                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2490                     RX_RES_STATUS_BAD_ICV_MIC)
2491                         stats->flag |= RX_FLAG_MMIC_ERROR;
2492         case RX_RES_STATUS_SEC_TYPE_WEP:
2493         case RX_RES_STATUS_SEC_TYPE_CCMP:
2494                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2495                     RX_RES_STATUS_DECRYPT_OK) {
2496                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2497                         stats->flag |= RX_FLAG_DECRYPTED;
2498                 }
2499                 break;
2500
2501         default:
2502                 break;
2503         }
2504 }
2505
2506
2507 #define IWL_PACKET_RETRY_TIME HZ
2508
2509 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2510 {
2511         u16 sc = le16_to_cpu(header->seq_ctrl);
2512         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2513         u16 frag = sc & IEEE80211_SCTL_FRAG;
2514         u16 *last_seq, *last_frag;
2515         unsigned long *last_time;
2516
2517         switch (priv->iw_mode) {
2518         case IEEE80211_IF_TYPE_IBSS:{
2519                 struct list_head *p;
2520                 struct iwl4965_ibss_seq *entry = NULL;
2521                 u8 *mac = header->addr2;
2522                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2523
2524                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2525                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2526                         if (!compare_ether_addr(entry->mac, mac))
2527                                 break;
2528                 }
2529                 if (p == &priv->ibss_mac_hash[index]) {
2530                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2531                         if (!entry) {
2532                                 IWL_ERROR("Cannot malloc new mac entry\n");
2533                                 return 0;
2534                         }
2535                         memcpy(entry->mac, mac, ETH_ALEN);
2536                         entry->seq_num = seq;
2537                         entry->frag_num = frag;
2538                         entry->packet_time = jiffies;
2539                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2540                         return 0;
2541                 }
2542                 last_seq = &entry->seq_num;
2543                 last_frag = &entry->frag_num;
2544                 last_time = &entry->packet_time;
2545                 break;
2546         }
2547         case IEEE80211_IF_TYPE_STA:
2548                 last_seq = &priv->last_seq_num;
2549                 last_frag = &priv->last_frag_num;
2550                 last_time = &priv->last_packet_time;
2551                 break;
2552         default:
2553                 return 0;
2554         }
2555         if ((*last_seq == seq) &&
2556             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2557                 if (*last_frag == frag)
2558                         goto drop;
2559                 if (*last_frag + 1 != frag)
2560                         /* out-of-order fragment */
2561                         goto drop;
2562         } else
2563                 *last_seq = seq;
2564
2565         *last_frag = frag;
2566         *last_time = jiffies;
2567         return 0;
2568
2569  drop:
2570         return 1;
2571 }
2572
2573 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2574
2575 #include "iwl-spectrum.h"
2576
2577 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2578 #define BEACON_TIME_MASK_HIGH   0xFF000000
2579 #define TIME_UNIT               1024
2580
2581 /*
2582  * extended beacon time format
2583  * time in usec will be changed into a 32-bit value in 8:24 format
2584  * the high 1 byte is the beacon counts
2585  * the lower 3 bytes is the time in usec within one beacon interval
2586  */
2587
2588 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2589 {
2590         u32 quot;
2591         u32 rem;
2592         u32 interval = beacon_interval * 1024;
2593
2594         if (!interval || !usec)
2595                 return 0;
2596
2597         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2598         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2599
2600         return (quot << 24) + rem;
2601 }
2602
2603 /* base is usually what we get from ucode with each received frame,
2604  * the same as HW timer counter counting down
2605  */
2606
2607 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2608 {
2609         u32 base_low = base & BEACON_TIME_MASK_LOW;
2610         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2611         u32 interval = beacon_interval * TIME_UNIT;
2612         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2613             (addon & BEACON_TIME_MASK_HIGH);
2614
2615         if (base_low > addon_low)
2616                 res += base_low - addon_low;
2617         else if (base_low < addon_low) {
2618                 res += interval + base_low - addon_low;
2619                 res += (1 << 24);
2620         } else
2621                 res += (1 << 24);
2622
2623         return cpu_to_le32(res);
2624 }
2625
2626 static int iwl4965_get_measurement(struct iwl_priv *priv,
2627                                struct ieee80211_measurement_params *params,
2628                                u8 type)
2629 {
2630         struct iwl4965_spectrum_cmd spectrum;
2631         struct iwl4965_rx_packet *res;
2632         struct iwl_host_cmd cmd = {
2633                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2634                 .data = (void *)&spectrum,
2635                 .meta.flags = CMD_WANT_SKB,
2636         };
2637         u32 add_time = le64_to_cpu(params->start_time);
2638         int rc;
2639         int spectrum_resp_status;
2640         int duration = le16_to_cpu(params->duration);
2641
2642         if (iwl_is_associated(priv))
2643                 add_time =
2644                     iwl4965_usecs_to_beacons(
2645                         le64_to_cpu(params->start_time) - priv->last_tsf,
2646                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2647
2648         memset(&spectrum, 0, sizeof(spectrum));
2649
2650         spectrum.channel_count = cpu_to_le16(1);
2651         spectrum.flags =
2652             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2653         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2654         cmd.len = sizeof(spectrum);
2655         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2656
2657         if (iwl_is_associated(priv))
2658                 spectrum.start_time =
2659                     iwl4965_add_beacon_time(priv->last_beacon_time,
2660                                 add_time,
2661                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2662         else
2663                 spectrum.start_time = 0;
2664
2665         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2666         spectrum.channels[0].channel = params->channel;
2667         spectrum.channels[0].type = type;
2668         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2669                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2670                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2671
2672         rc = iwl_send_cmd_sync(priv, &cmd);
2673         if (rc)
2674                 return rc;
2675
2676         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2677         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2678                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2679                 rc = -EIO;
2680         }
2681
2682         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2683         switch (spectrum_resp_status) {
2684         case 0:         /* Command will be handled */
2685                 if (res->u.spectrum.id != 0xff) {
2686                         IWL_DEBUG_INFO
2687                             ("Replaced existing measurement: %d\n",
2688                              res->u.spectrum.id);
2689                         priv->measurement_status &= ~MEASUREMENT_READY;
2690                 }
2691                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2692                 rc = 0;
2693                 break;
2694
2695         case 1:         /* Command will not be handled */
2696                 rc = -EAGAIN;
2697                 break;
2698         }
2699
2700         dev_kfree_skb_any(cmd.meta.u.skb);
2701
2702         return rc;
2703 }
2704 #endif
2705
2706 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2707                                  struct iwl4965_tx_info *tx_sta)
2708 {
2709
2710         tx_sta->status.ack_signal = 0;
2711         tx_sta->status.excessive_retries = 0;
2712         tx_sta->status.queue_length = 0;
2713         tx_sta->status.queue_number = 0;
2714
2715         if (in_interrupt())
2716                 ieee80211_tx_status_irqsafe(priv->hw,
2717                                             tx_sta->skb[0], &(tx_sta->status));
2718         else
2719                 ieee80211_tx_status(priv->hw,
2720                                     tx_sta->skb[0], &(tx_sta->status));
2721
2722         tx_sta->skb[0] = NULL;
2723 }
2724
2725 /**
2726  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2727  *
2728  * When FW advances 'R' index, all entries between old and new 'R' index
2729  * need to be reclaimed. As result, some free space forms.  If there is
2730  * enough free space (> low mark), wake the stack that feeds us.
2731  */
2732 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2733 {
2734         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2735         struct iwl4965_queue *q = &txq->q;
2736         int nfreed = 0;
2737
2738         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2739                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2740                           "is out of range [0-%d] %d %d.\n", txq_id,
2741                           index, q->n_bd, q->write_ptr, q->read_ptr);
2742                 return 0;
2743         }
2744
2745         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2746                 q->read_ptr != index;
2747                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2748                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2749                         iwl4965_txstatus_to_ieee(priv,
2750                                         &(txq->txb[txq->q.read_ptr]));
2751                         iwl4965_hw_txq_free_tfd(priv, txq);
2752                 } else if (nfreed > 1) {
2753                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2754                                         q->write_ptr, q->read_ptr);
2755                         queue_work(priv->workqueue, &priv->restart);
2756                 }
2757                 nfreed++;
2758         }
2759
2760 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2761                         (txq_id != IWL_CMD_QUEUE_NUM) &&
2762                         priv->mac80211_registered)
2763                 ieee80211_wake_queue(priv->hw, txq_id); */
2764
2765
2766         return nfreed;
2767 }
2768
2769 static int iwl4965_is_tx_success(u32 status)
2770 {
2771         status &= TX_STATUS_MSK;
2772         return (status == TX_STATUS_SUCCESS)
2773             || (status == TX_STATUS_DIRECT_DONE);
2774 }
2775
2776 /******************************************************************************
2777  *
2778  * Generic RX handler implementations
2779  *
2780  ******************************************************************************/
2781 #ifdef CONFIG_IWL4965_HT
2782
2783 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2784                                     struct ieee80211_hdr *hdr)
2785 {
2786         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2787                 return IWL_AP_ID;
2788         else {
2789                 u8 *da = ieee80211_get_DA(hdr);
2790                 return iwl4965_hw_find_station(priv, da);
2791         }
2792 }
2793
2794 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2795         struct iwl_priv *priv, int txq_id, int idx)
2796 {
2797         if (priv->txq[txq_id].txb[idx].skb[0])
2798                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2799                                 txb[idx].skb[0]->data;
2800         return NULL;
2801 }
2802
2803 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2804 {
2805         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2806                                 tx_resp->frame_count);
2807         return le32_to_cpu(*scd_ssn) & MAX_SN;
2808
2809 }
2810
2811 /**
2812  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2813  */
2814 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2815                                       struct iwl4965_ht_agg *agg,
2816                                       struct iwl4965_tx_resp_agg *tx_resp,
2817                                       u16 start_idx)
2818 {
2819         u16 status;
2820         struct agg_tx_status *frame_status = &tx_resp->status;
2821         struct ieee80211_tx_status *tx_status = NULL;
2822         struct ieee80211_hdr *hdr = NULL;
2823         int i, sh;
2824         int txq_id, idx;
2825         u16 seq;
2826
2827         if (agg->wait_for_ba)
2828                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2829
2830         agg->frame_count = tx_resp->frame_count;
2831         agg->start_idx = start_idx;
2832         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2833         agg->bitmap = 0;
2834
2835         /* # frames attempted by Tx command */
2836         if (agg->frame_count == 1) {
2837                 /* Only one frame was attempted; no block-ack will arrive */
2838                 status = le16_to_cpu(frame_status[0].status);
2839                 seq  = le16_to_cpu(frame_status[0].sequence);
2840                 idx = SEQ_TO_INDEX(seq);
2841                 txq_id = SEQ_TO_QUEUE(seq);
2842
2843                 /* FIXME: code repetition */
2844                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2845                                    agg->frame_count, agg->start_idx, idx);
2846
2847                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2848                 tx_status->retry_count = tx_resp->failure_frame;
2849                 tx_status->queue_number = status & 0xff;
2850                 tx_status->queue_length = tx_resp->failure_rts;
2851                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2852                 tx_status->flags = iwl4965_is_tx_success(status)?
2853                         IEEE80211_TX_STATUS_ACK : 0;
2854                 iwl4965_hwrate_to_tx_control(priv,
2855                                              le32_to_cpu(tx_resp->rate_n_flags),
2856                                              &tx_status->control);
2857                 /* FIXME: code repetition end */
2858
2859                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2860                                     status & 0xff, tx_resp->failure_frame);
2861                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2862                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2863
2864                 agg->wait_for_ba = 0;
2865         } else {
2866                 /* Two or more frames were attempted; expect block-ack */
2867                 u64 bitmap = 0;
2868                 int start = agg->start_idx;
2869
2870                 /* Construct bit-map of pending frames within Tx window */
2871                 for (i = 0; i < agg->frame_count; i++) {
2872                         u16 sc;
2873                         status = le16_to_cpu(frame_status[i].status);
2874                         seq  = le16_to_cpu(frame_status[i].sequence);
2875                         idx = SEQ_TO_INDEX(seq);
2876                         txq_id = SEQ_TO_QUEUE(seq);
2877
2878                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2879                                       AGG_TX_STATE_ABORT_MSK))
2880                                 continue;
2881
2882                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2883                                            agg->frame_count, txq_id, idx);
2884
2885                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2886
2887                         sc = le16_to_cpu(hdr->seq_ctrl);
2888                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2889                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2890                                           " idx=%d, seq_idx=%d, seq=%d\n",
2891                                           idx, SEQ_TO_SN(sc),
2892                                           hdr->seq_ctrl);
2893                                 return -1;
2894                         }
2895
2896                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2897                                            i, idx, SEQ_TO_SN(sc));
2898
2899                         sh = idx - start;
2900                         if (sh > 64) {
2901                                 sh = (start - idx) + 0xff;
2902                                 bitmap = bitmap << sh;
2903                                 sh = 0;
2904                                 start = idx;
2905                         } else if (sh < -64)
2906                                 sh  = 0xff - (start - idx);
2907                         else if (sh < 0) {
2908                                 sh = start - idx;
2909                                 start = idx;
2910                                 bitmap = bitmap << sh;
2911                                 sh = 0;
2912                         }
2913                         bitmap |= (1 << sh);
2914                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2915                                            start, (u32)(bitmap & 0xFFFFFFFF));
2916                 }
2917
2918                 agg->bitmap = bitmap;
2919                 agg->start_idx = start;
2920                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2921                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2922                                    agg->frame_count, agg->start_idx,
2923                                    (unsigned long long)agg->bitmap);
2924
2925                 if (bitmap)
2926                         agg->wait_for_ba = 1;
2927         }
2928         return 0;
2929 }
2930 #endif
2931
2932 /**
2933  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2934  */
2935 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2936                             struct iwl4965_rx_mem_buffer *rxb)
2937 {
2938         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2939         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2940         int txq_id = SEQ_TO_QUEUE(sequence);
2941         int index = SEQ_TO_INDEX(sequence);
2942         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2943         struct ieee80211_tx_status *tx_status;
2944         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2945         u32  status = le32_to_cpu(tx_resp->status);
2946 #ifdef CONFIG_IWL4965_HT
2947         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2948         struct ieee80211_hdr *hdr;
2949         __le16 *qc;
2950 #endif
2951
2952         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2953                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2954                           "is out of range [0-%d] %d %d\n", txq_id,
2955                           index, txq->q.n_bd, txq->q.write_ptr,
2956                           txq->q.read_ptr);
2957                 return;
2958         }
2959
2960 #ifdef CONFIG_IWL4965_HT
2961         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2962         qc = ieee80211_get_qos_ctrl(hdr);
2963
2964         if (qc)
2965                 tid = le16_to_cpu(*qc) & 0xf;
2966
2967         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2968         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2969                 IWL_ERROR("Station not known\n");
2970                 return;
2971         }
2972
2973         if (txq->sched_retry) {
2974                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2975                 struct iwl4965_ht_agg *agg = NULL;
2976
2977                 if (!qc)
2978                         return;
2979
2980                 agg = &priv->stations[sta_id].tid[tid].agg;
2981
2982                 iwl4965_tx_status_reply_tx(priv, agg,
2983                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2984
2985                 if ((tx_resp->frame_count == 1) &&
2986                     !iwl4965_is_tx_success(status)) {
2987                         /* TODO: send BAR */
2988                 }
2989
2990                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2991                         int freed;
2992                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2993                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2994                                            "%d index %d\n", scd_ssn , index);
2995                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2996                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2997
2998                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2999                             txq_id >= 0 && priv->mac80211_registered &&
3000                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3001                                 ieee80211_wake_queue(priv->hw, txq_id);
3002
3003                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3004                 }
3005         } else {
3006 #endif /* CONFIG_IWL4965_HT */
3007         tx_status = &(txq->txb[txq->q.read_ptr].status);
3008
3009         tx_status->retry_count = tx_resp->failure_frame;
3010         tx_status->queue_number = status;
3011         tx_status->queue_length = tx_resp->bt_kill_count;
3012         tx_status->queue_length |= tx_resp->failure_rts;
3013         tx_status->flags =
3014             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3015         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3016                                      &tx_status->control);
3017
3018         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3019                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3020                      status, le32_to_cpu(tx_resp->rate_n_flags),
3021                      tx_resp->failure_frame);
3022
3023         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3024         if (index != -1) {
3025                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3026 #ifdef CONFIG_IWL4965_HT
3027                 if (tid != MAX_TID_COUNT)
3028                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3029                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3030                         (txq_id >= 0) &&
3031                         priv->mac80211_registered)
3032                         ieee80211_wake_queue(priv->hw, txq_id);
3033                 if (tid != MAX_TID_COUNT)
3034                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3035 #endif
3036         }
3037 #ifdef CONFIG_IWL4965_HT
3038         }
3039 #endif /* CONFIG_IWL4965_HT */
3040
3041         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3042                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3043 }
3044
3045
3046 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
3047                                struct iwl4965_rx_mem_buffer *rxb)
3048 {
3049         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3050         struct iwl4965_alive_resp *palive;
3051         struct delayed_work *pwork;
3052
3053         palive = &pkt->u.alive_frame;
3054
3055         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3056                        "0x%01X 0x%01X\n",
3057                        palive->is_valid, palive->ver_type,
3058                        palive->ver_subtype);
3059
3060         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3061                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3062                 memcpy(&priv->card_alive_init,
3063                        &pkt->u.alive_frame,
3064                        sizeof(struct iwl4965_init_alive_resp));
3065                 pwork = &priv->init_alive_start;
3066         } else {
3067                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3068                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3069                        sizeof(struct iwl4965_alive_resp));
3070                 pwork = &priv->alive_start;
3071         }
3072
3073         /* We delay the ALIVE response by 5ms to
3074          * give the HW RF Kill time to activate... */
3075         if (palive->is_valid == UCODE_VALID_OK)
3076                 queue_delayed_work(priv->workqueue, pwork,
3077                                    msecs_to_jiffies(5));
3078         else
3079                 IWL_WARNING("uCode did not respond OK.\n");
3080 }
3081
3082 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
3083                                  struct iwl4965_rx_mem_buffer *rxb)
3084 {
3085         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3086
3087         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3088         return;
3089 }
3090
3091 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
3092                                struct iwl4965_rx_mem_buffer *rxb)
3093 {
3094         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3095
3096         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3097                 "seq 0x%04X ser 0x%08X\n",
3098                 le32_to_cpu(pkt->u.err_resp.error_type),
3099                 get_cmd_string(pkt->u.err_resp.cmd_id),
3100                 pkt->u.err_resp.cmd_id,
3101                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3102                 le32_to_cpu(pkt->u.err_resp.error_info));
3103 }
3104
3105 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3106
3107 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3108 {
3109         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3110         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3111         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3112         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3113                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3114         rxon->channel = csa->channel;
3115         priv->staging_rxon.channel = csa->channel;
3116 }
3117
3118 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
3119                                           struct iwl4965_rx_mem_buffer *rxb)
3120 {
3121 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3122         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3123         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3124
3125         if (!report->state) {
3126                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3127                           "Spectrum Measure Notification: Start\n");
3128                 return;
3129         }
3130
3131         memcpy(&priv->measure_report, report, sizeof(*report));
3132         priv->measurement_status |= MEASUREMENT_READY;
3133 #endif
3134 }
3135
3136 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
3137                                   struct iwl4965_rx_mem_buffer *rxb)
3138 {
3139 #ifdef CONFIG_IWLWIFI_DEBUG
3140         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3141         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3142         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3143                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3144 #endif
3145 }
3146
3147 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3148                                              struct iwl4965_rx_mem_buffer *rxb)
3149 {
3150         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3151         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3152                         "notification for %s:\n",
3153                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3154         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3155 }
3156
3157 static void iwl4965_bg_beacon_update(struct work_struct *work)
3158 {
3159         struct iwl_priv *priv =
3160                 container_of(work, struct iwl_priv, beacon_update);
3161         struct sk_buff *beacon;
3162
3163         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3164         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3165
3166         if (!beacon) {
3167                 IWL_ERROR("update beacon failed\n");
3168                 return;
3169         }
3170
3171         mutex_lock(&priv->mutex);
3172         /* new beacon skb is allocated every time; dispose previous.*/
3173         if (priv->ibss_beacon)
3174                 dev_kfree_skb(priv->ibss_beacon);
3175
3176         priv->ibss_beacon = beacon;
3177         mutex_unlock(&priv->mutex);
3178
3179         iwl4965_send_beacon_cmd(priv);
3180 }
3181
3182 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3183                                 struct iwl4965_rx_mem_buffer *rxb)
3184 {
3185 #ifdef CONFIG_IWLWIFI_DEBUG
3186         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3187         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3188         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3189
3190         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3191                 "tsf %d %d rate %d\n",
3192                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3193                 beacon->beacon_notify_hdr.failure_frame,
3194                 le32_to_cpu(beacon->ibss_mgr_status),
3195                 le32_to_cpu(beacon->high_tsf),
3196                 le32_to_cpu(beacon->low_tsf), rate);
3197 #endif
3198
3199         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3200             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3201                 queue_work(priv->workqueue, &priv->beacon_update);
3202 }
3203
3204 /* Service response to REPLY_SCAN_CMD (0x80) */
3205 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3206                               struct iwl4965_rx_mem_buffer *rxb)
3207 {
3208 #ifdef CONFIG_IWLWIFI_DEBUG
3209         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3210         struct iwl4965_scanreq_notification *notif =
3211             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3212
3213         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3214 #endif
3215 }
3216
3217 /* Service SCAN_START_NOTIFICATION (0x82) */
3218 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3219                                     struct iwl4965_rx_mem_buffer *rxb)
3220 {
3221         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3222         struct iwl4965_scanstart_notification *notif =
3223             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3224         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3225         IWL_DEBUG_SCAN("Scan start: "
3226                        "%d [802.11%s] "
3227                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3228                        notif->channel,
3229                        notif->band ? "bg" : "a",
3230                        notif->tsf_high,
3231                        notif->tsf_low, notif->status, notif->beacon_timer);
3232 }
3233
3234 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3235 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3236                                       struct iwl4965_rx_mem_buffer *rxb)
3237 {
3238         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3239         struct iwl4965_scanresults_notification *notif =
3240             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3241
3242         IWL_DEBUG_SCAN("Scan ch.res: "
3243                        "%d [802.11%s] "
3244                        "(TSF: 0x%08X:%08X) - %d "
3245                        "elapsed=%lu usec (%dms since last)\n",
3246                        notif->channel,
3247                        notif->band ? "bg" : "a",
3248                        le32_to_cpu(notif->tsf_high),
3249                        le32_to_cpu(notif->tsf_low),
3250                        le32_to_cpu(notif->statistics[0]),
3251                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3252                        jiffies_to_msecs(elapsed_jiffies
3253                                         (priv->last_scan_jiffies, jiffies)));
3254
3255         priv->last_scan_jiffies = jiffies;
3256         priv->next_scan_jiffies = 0;
3257 }
3258
3259 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3260 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3261                                        struct iwl4965_rx_mem_buffer *rxb)
3262 {
3263         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3264         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3265
3266         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3267                        scan_notif->scanned_channels,
3268                        scan_notif->tsf_low,
3269                        scan_notif->tsf_high, scan_notif->status);
3270
3271         /* The HW is no longer scanning */
3272         clear_bit(STATUS_SCAN_HW, &priv->status);
3273
3274         /* The scan completion notification came in, so kill that timer... */
3275         cancel_delayed_work(&priv->scan_check);
3276
3277         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3278                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3279                        jiffies_to_msecs(elapsed_jiffies
3280                                         (priv->scan_pass_start, jiffies)));
3281
3282         /* Remove this scanned band from the list
3283          * of pending bands to scan */
3284         priv->scan_bands--;
3285
3286         /* If a request to abort was given, or the scan did not succeed
3287          * then we reset the scan state machine and terminate,
3288          * re-queuing another scan if one has been requested */
3289         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3290                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3291                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3292         } else {
3293                 /* If there are more bands on this scan pass reschedule */
3294                 if (priv->scan_bands > 0)
3295                         goto reschedule;
3296         }
3297
3298         priv->last_scan_jiffies = jiffies;
3299         priv->next_scan_jiffies = 0;
3300         IWL_DEBUG_INFO("Setting scan to off\n");
3301
3302         clear_bit(STATUS_SCANNING, &priv->status);
3303
3304         IWL_DEBUG_INFO("Scan took %dms\n",
3305                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3306
3307         queue_work(priv->workqueue, &priv->scan_completed);
3308
3309         return;
3310
3311 reschedule:
3312         priv->scan_pass_start = jiffies;
3313         queue_work(priv->workqueue, &priv->request_scan);
3314 }
3315
3316 /* Handle notification from uCode that card's power state is changing
3317  * due to software, hardware, or critical temperature RFKILL */
3318 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3319                                     struct iwl4965_rx_mem_buffer *rxb)
3320 {
3321         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3322         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3323         unsigned long status = priv->status;
3324
3325         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3326                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3327                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3328
3329         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3330                      RF_CARD_DISABLED)) {
3331
3332                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3333                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3334
3335                 if (!iwl_grab_nic_access(priv)) {
3336                         iwl_write_direct32(
3337                                 priv, HBUS_TARG_MBX_C,
3338                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3339
3340                         iwl_release_nic_access(priv);
3341                 }
3342
3343                 if (!(flags & RXON_CARD_DISABLED)) {
3344                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3345                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3346                         if (!iwl_grab_nic_access(priv)) {
3347                                 iwl_write_direct32(
3348                                         priv, HBUS_TARG_MBX_C,
3349                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3350
3351                                 iwl_release_nic_access(priv);
3352                         }
3353                 }
3354
3355                 if (flags & RF_CARD_DISABLED) {
3356                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3357                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3358                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3359                         if (!iwl_grab_nic_access(priv))
3360                                 iwl_release_nic_access(priv);
3361                 }
3362         }
3363
3364         if (flags & HW_CARD_DISABLED)
3365                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3366         else
3367                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3368
3369
3370         if (flags & SW_CARD_DISABLED)
3371                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3372         else
3373                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3374
3375         if (!(flags & RXON_CARD_DISABLED))
3376                 iwl4965_scan_cancel(priv);
3377
3378         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3379              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3380             (test_bit(STATUS_RF_KILL_SW, &status) !=
3381              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3382                 queue_work(priv->workqueue, &priv->rf_kill);
3383         else
3384                 wake_up_interruptible(&priv->wait_command_queue);
3385 }
3386
3387 /**
3388  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3389  *
3390  * Setup the RX handlers for each of the reply types sent from the uCode
3391  * to the host.
3392  *
3393  * This function chains into the hardware specific files for them to setup
3394  * any hardware specific handlers as well.
3395  */
3396 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3397 {
3398         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3399         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3400         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3401         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3402         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3403             iwl4965_rx_spectrum_measure_notif;
3404         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3405         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3406             iwl4965_rx_pm_debug_statistics_notif;
3407         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3408
3409         /*
3410          * The same handler is used for both the REPLY to a discrete
3411          * statistics request from the host as well as for the periodic
3412          * statistics notifications (after received beacons) from the uCode.
3413          */
3414         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3415         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3416
3417         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3418         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3419         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3420             iwl4965_rx_scan_results_notif;
3421         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3422             iwl4965_rx_scan_complete_notif;
3423         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3424         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3425
3426         /* Set up hardware specific Rx handlers */
3427         iwl4965_hw_rx_handler_setup(priv);
3428 }
3429
3430 /**
3431  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3432  * @rxb: Rx buffer to reclaim
3433  *
3434  * If an Rx buffer has an async callback associated with it the callback
3435  * will be executed.  The attached skb (if present) will only be freed
3436  * if the callback returns 1
3437  */
3438 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3439                                 struct iwl4965_rx_mem_buffer *rxb)
3440 {
3441         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3442         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3443         int txq_id = SEQ_TO_QUEUE(sequence);
3444         int index = SEQ_TO_INDEX(sequence);
3445         int huge = sequence & SEQ_HUGE_FRAME;
3446         int cmd_index;
3447         struct iwl_cmd *cmd;
3448
3449         /* If a Tx command is being handled and it isn't in the actual
3450          * command queue then there a command routing bug has been introduced
3451          * in the queue management code. */
3452         if (txq_id != IWL_CMD_QUEUE_NUM)
3453                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3454                           txq_id, pkt->hdr.cmd);
3455         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3456
3457         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3458         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3459
3460         /* Input error checking is done when commands are added to queue. */
3461         if (cmd->meta.flags & CMD_WANT_SKB) {
3462                 cmd->meta.source->u.skb = rxb->skb;
3463                 rxb->skb = NULL;
3464         } else if (cmd->meta.u.callback &&
3465                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3466                 rxb->skb = NULL;
3467
3468         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3469
3470         if (!(cmd->meta.flags & CMD_ASYNC)) {
3471                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3472                 wake_up_interruptible(&priv->wait_command_queue);
3473         }
3474 }
3475
3476 /************************** RX-FUNCTIONS ****************************/
3477 /*
3478  * Rx theory of operation
3479  *
3480  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3481  * each of which point to Receive Buffers to be filled by 4965.  These get
3482  * used not only for Rx frames, but for any command response or notification
3483  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3484  * of indexes into the circular buffer.
3485  *
3486  * Rx Queue Indexes
3487  * The host/firmware share two index registers for managing the Rx buffers.
3488  *
3489  * The READ index maps to the first position that the firmware may be writing
3490  * to -- the driver can read up to (but not including) this position and get
3491  * good data.
3492  * The READ index is managed by the firmware once the card is enabled.
3493  *
3494  * The WRITE index maps to the last position the driver has read from -- the
3495  * position preceding WRITE is the last slot the firmware can place a packet.
3496  *
3497  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3498  * WRITE = READ.
3499  *
3500  * During initialization, the host sets up the READ queue position to the first
3501  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3502  *
3503  * When the firmware places a packet in a buffer, it will advance the READ index
3504  * and fire the RX interrupt.  The driver can then query the READ index and
3505  * process as many packets as possible, moving the WRITE index forward as it
3506  * resets the Rx queue buffers with new memory.
3507  *
3508  * The management in the driver is as follows:
3509  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3510  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3511  *   to replenish the iwl->rxq->rx_free.
3512  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3513  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3514  *   'processed' and 'read' driver indexes as well)
3515  * + A received packet is processed and handed to the kernel network stack,
3516  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3517  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3518  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3519  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3520  *   were enough free buffers and RX_STALLED is set it is cleared.
3521  *
3522  *
3523  * Driver sequence:
3524  *
3525  * iwl4965_rx_queue_alloc()   Allocates rx_free
3526  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3527  *                            iwl4965_rx_queue_restock
3528  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3529  *                            queue, updates firmware pointers, and updates
3530  *                            the WRITE index.  If insufficient rx_free buffers
3531  *                            are available, schedules iwl4965_rx_replenish
3532  *
3533  * -- enable interrupts --
3534  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3535  *                            READ INDEX, detaching the SKB from the pool.
3536  *                            Moves the packet buffer from queue to rx_used.
3537  *                            Calls iwl4965_rx_queue_restock to refill any empty
3538  *                            slots.
3539  * ...
3540  *
3541  */
3542
3543 /**
3544  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3545  */
3546 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3547 {
3548         int s = q->read - q->write;
3549         if (s <= 0)
3550                 s += RX_QUEUE_SIZE;
3551         /* keep some buffer to not confuse full and empty queue */
3552         s -= 2;
3553         if (s < 0)
3554                 s = 0;
3555         return s;
3556 }
3557
3558 /**
3559  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3560  */
3561 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3562 {
3563         u32 reg = 0;
3564         int rc = 0;
3565         unsigned long flags;
3566
3567         spin_lock_irqsave(&q->lock, flags);
3568
3569         if (q->need_update == 0)
3570                 goto exit_unlock;
3571
3572         /* If power-saving is in use, make sure device is awake */
3573         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3574                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3575
3576                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3577                         iwl_set_bit(priv, CSR_GP_CNTRL,
3578                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3579                         goto exit_unlock;
3580                 }
3581
3582                 rc = iwl_grab_nic_access(priv);
3583                 if (rc)
3584                         goto exit_unlock;
3585
3586                 /* Device expects a multiple of 8 */
3587                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3588                                      q->write & ~0x7);
3589                 iwl_release_nic_access(priv);
3590
3591         /* Else device is assumed to be awake */
3592         } else
3593                 /* Device expects a multiple of 8 */
3594                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3595
3596
3597         q->need_update = 0;
3598
3599  exit_unlock:
3600         spin_unlock_irqrestore(&q->lock, flags);
3601         return rc;
3602 }
3603
3604 /**
3605  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3606  */
3607 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3608                                           dma_addr_t dma_addr)
3609 {
3610         return cpu_to_le32((u32)(dma_addr >> 8));
3611 }
3612
3613
3614 /**
3615  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3616  *
3617  * If there are slots in the RX queue that need to be restocked,
3618  * and we have free pre-allocated buffers, fill the ranks as much
3619  * as we can, pulling from rx_free.
3620  *
3621  * This moves the 'write' index forward to catch up with 'processed', and
3622  * also updates the memory address in the firmware to reference the new
3623  * target buffer.
3624  */
3625 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3626 {
3627         struct iwl4965_rx_queue *rxq = &priv->rxq;
3628         struct list_head *element;
3629         struct iwl4965_rx_mem_buffer *rxb;
3630         unsigned long flags;
3631         int write, rc;
3632
3633         spin_lock_irqsave(&rxq->lock, flags);
3634         write = rxq->write & ~0x7;
3635         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3636                 /* Get next free Rx buffer, remove from free list */
3637                 element = rxq->rx_free.next;
3638                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3639                 list_del(element);
3640
3641                 /* Point to Rx buffer via next RBD in circular buffer */
3642                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3643                 rxq->queue[rxq->write] = rxb;
3644                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3645                 rxq->free_count--;
3646         }
3647         spin_unlock_irqrestore(&rxq->lock, flags);
3648         /* If the pre-allocated buffer pool is dropping low, schedule to
3649          * refill it */
3650         if (rxq->free_count <= RX_LOW_WATERMARK)
3651                 queue_work(priv->workqueue, &priv->rx_replenish);
3652
3653
3654         /* If we've added more space for the firmware to place data, tell it.
3655          * Increment device's write pointer in multiples of 8. */
3656         if ((write != (rxq->write & ~0x7))
3657             || (abs(rxq->write - rxq->read) > 7)) {
3658                 spin_lock_irqsave(&rxq->lock, flags);
3659                 rxq->need_update = 1;
3660                 spin_unlock_irqrestore(&rxq->lock, flags);
3661                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3662                 if (rc)
3663                         return rc;
3664         }
3665
3666         return 0;
3667 }
3668
3669 /**
3670  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3671  *
3672  * When moving to rx_free an SKB is allocated for the slot.
3673  *
3674  * Also restock the Rx queue via iwl4965_rx_queue_restock.
3675  * This is called as a scheduled work item (except for during initialization)
3676  */
3677 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3678 {
3679         struct iwl4965_rx_queue *rxq = &priv->rxq;
3680         struct list_head *element;
3681         struct iwl4965_rx_mem_buffer *rxb;
3682         unsigned long flags;
3683         spin_lock_irqsave(&rxq->lock, flags);
3684         while (!list_empty(&rxq->rx_used)) {
3685                 element = rxq->rx_used.next;
3686                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3687
3688                 /* Alloc a new receive buffer */
3689                 rxb->skb =
3690                     alloc_skb(priv->hw_params.rx_buf_size,
3691                                 __GFP_NOWARN | GFP_ATOMIC);
3692                 if (!rxb->skb) {
3693                         if (net_ratelimit())
3694                                 printk(KERN_CRIT DRV_NAME
3695                                        ": Can not allocate SKB buffers\n");
3696                         /* We don't reschedule replenish work here -- we will
3697                          * call the restock method and if it still needs
3698                          * more buffers it will schedule replenish */
3699                         break;
3700                 }
3701                 priv->alloc_rxb_skb++;
3702                 list_del(element);
3703
3704                 /* Get physical address of RB/SKB */
3705                 rxb->dma_addr =
3706                     pci_map_single(priv->pci_dev, rxb->skb->data,
3707                            priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3708                 list_add_tail(&rxb->list, &rxq->rx_free);
3709                 rxq->free_count++;
3710         }
3711         spin_unlock_irqrestore(&rxq->lock, flags);
3712 }
3713
3714 /*
3715  * this should be called while priv->lock is locked
3716 */
3717 static void __iwl4965_rx_replenish(void *data)
3718 {
3719         struct iwl_priv *priv = data;
3720
3721         iwl4965_rx_allocate(priv);
3722         iwl4965_rx_queue_restock(priv);
3723 }
3724
3725
3726 void iwl4965_rx_replenish(void *data)
3727 {
3728         struct iwl_priv *priv = data;
3729         unsigned long flags;
3730
3731         iwl4965_rx_allocate(priv);
3732
3733         spin_lock_irqsave(&priv->lock, flags);
3734         iwl4965_rx_queue_restock(priv);
3735         spin_unlock_irqrestore(&priv->lock, flags);
3736 }
3737
3738 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3739  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3740  * This free routine walks the list of POOL entries and if SKB is set to
3741  * non NULL it is unmapped and freed
3742  */
3743 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3744 {
3745         int i;
3746         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3747                 if (rxq->pool[i].skb != NULL) {
3748                         pci_unmap_single(priv->pci_dev,
3749                                          rxq->pool[i].dma_addr,
3750                                          priv->hw_params.rx_buf_size,
3751                                          PCI_DMA_FROMDEVICE);
3752                         dev_kfree_skb(rxq->pool[i].skb);
3753                 }
3754         }
3755
3756         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3757                             rxq->dma_addr);
3758         rxq->bd = NULL;
3759 }
3760
3761 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3762 {
3763         struct iwl4965_rx_queue *rxq = &priv->rxq;
3764         struct pci_dev *dev = priv->pci_dev;
3765         int i;
3766
3767         spin_lock_init(&rxq->lock);
3768         INIT_LIST_HEAD(&rxq->rx_free);
3769         INIT_LIST_HEAD(&rxq->rx_used);
3770
3771         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3772         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3773         if (!rxq->bd)
3774                 return -ENOMEM;
3775
3776         /* Fill the rx_used queue with _all_ of the Rx buffers */
3777         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3778                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3779
3780         /* Set us so that we have processed and used all buffers, but have
3781          * not restocked the Rx queue with fresh buffers */
3782         rxq->read = rxq->write = 0;
3783         rxq->free_count = 0;
3784         rxq->need_update = 0;
3785         return 0;
3786 }
3787
3788 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3789 {
3790         unsigned long flags;
3791         int i;
3792         spin_lock_irqsave(&rxq->lock, flags);
3793         INIT_LIST_HEAD(&rxq->rx_free);
3794         INIT_LIST_HEAD(&rxq->rx_used);
3795         /* Fill the rx_used queue with _all_ of the Rx buffers */
3796         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3797                 /* In the reset function, these buffers may have been allocated
3798                  * to an SKB, so we need to unmap and free potential storage */
3799                 if (rxq->pool[i].skb != NULL) {
3800                         pci_unmap_single(priv->pci_dev,
3801                                          rxq->pool[i].dma_addr,
3802                                          priv->hw_params.rx_buf_size,
3803                                          PCI_DMA_FROMDEVICE);
3804                         priv->alloc_rxb_skb--;
3805                         dev_kfree_skb(rxq->pool[i].skb);
3806                         rxq->pool[i].skb = NULL;
3807                 }
3808                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3809         }
3810
3811         /* Set us so that we have processed and used all buffers, but have
3812          * not restocked the Rx queue with fresh buffers */
3813         rxq->read = rxq->write = 0;
3814         rxq->free_count = 0;
3815         spin_unlock_irqrestore(&rxq->lock, flags);
3816 }
3817
3818 /* Convert linear signal-to-noise ratio into dB */
3819 static u8 ratio2dB[100] = {
3820 /*       0   1   2   3   4   5   6   7   8   9 */
3821          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3822         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3823         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3824         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3825         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3826         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3827         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3828         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3829         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3830         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3831 };
3832
3833 /* Calculates a relative dB value from a ratio of linear
3834  *   (i.e. not dB) signal levels.
3835  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3836 int iwl4965_calc_db_from_ratio(int sig_ratio)
3837 {
3838         /* 1000:1 or higher just report as 60 dB */
3839         if (sig_ratio >= 1000)
3840                 return 60;
3841
3842         /* 100:1 or higher, divide by 10 and use table,
3843          *   add 20 dB to make up for divide by 10 */
3844         if (sig_ratio >= 100)
3845                 return (20 + (int)ratio2dB[sig_ratio/10]);
3846
3847         /* We shouldn't see this */
3848         if (sig_ratio < 1)
3849                 return 0;
3850
3851         /* Use table for ratios 1:1 - 99:1 */
3852         return (int)ratio2dB[sig_ratio];
3853 }
3854
3855 #define PERFECT_RSSI (-20) /* dBm */
3856 #define WORST_RSSI (-95)   /* dBm */
3857 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3858
3859 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3860  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3861  *   about formulas used below. */
3862 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3863 {
3864         int sig_qual;
3865         int degradation = PERFECT_RSSI - rssi_dbm;
3866
3867         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3868          * as indicator; formula is (signal dbm - noise dbm).
3869          * SNR at or above 40 is a great signal (100%).
3870          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3871          * Weakest usable signal is usually 10 - 15 dB SNR. */
3872         if (noise_dbm) {
3873                 if (rssi_dbm - noise_dbm >= 40)
3874                         return 100;
3875                 else if (rssi_dbm < noise_dbm)
3876                         return 0;
3877                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3878
3879         /* Else use just the signal level.
3880          * This formula is a least squares fit of data points collected and
3881          *   compared with a reference system that had a percentage (%) display
3882          *   for signal quality. */
3883         } else
3884                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3885                             (15 * RSSI_RANGE + 62 * degradation)) /
3886                            (RSSI_RANGE * RSSI_RANGE);
3887
3888         if (sig_qual > 100)
3889                 sig_qual = 100;
3890         else if (sig_qual < 1)
3891                 sig_qual = 0;
3892
3893         return sig_qual;
3894 }
3895
3896 /**
3897  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3898  *
3899  * Uses the priv->rx_handlers callback function array to invoke
3900  * the appropriate handlers, including command responses,
3901  * frame-received notifications, and other notifications.
3902  */
3903 static void iwl4965_rx_handle(struct iwl_priv *priv)
3904 {
3905         struct iwl4965_rx_mem_buffer *rxb;
3906         struct iwl4965_rx_packet *pkt;
3907         struct iwl4965_rx_queue *rxq = &priv->rxq;
3908         u32 r, i;
3909         int reclaim;
3910         unsigned long flags;
3911         u8 fill_rx = 0;
3912         u32 count = 8;
3913
3914         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3915          * buffer that the driver may process (last buffer filled by ucode). */
3916         r = iwl4965_hw_get_rx_read(priv);
3917         i = rxq->read;
3918
3919         /* Rx interrupt, but nothing sent from uCode */
3920         if (i == r)
3921                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3922
3923         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3924                 fill_rx = 1;
3925
3926         while (i != r) {
3927                 rxb = rxq->queue[i];
3928
3929                 /* If an RXB doesn't have a Rx queue slot associated with it,
3930                  * then a bug has been introduced in the queue refilling
3931                  * routines -- catch it here */
3932                 BUG_ON(rxb == NULL);
3933
3934                 rxq->queue[i] = NULL;
3935
3936                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3937                                             priv->hw_params.rx_buf_size,
3938                                             PCI_DMA_FROMDEVICE);
3939                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3940
3941                 /* Reclaim a command buffer only if this packet is a response
3942                  *   to a (driver-originated) command.
3943                  * If the packet (e.g. Rx frame) originated from uCode,
3944                  *   there is no command buffer to reclaim.
3945                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3946                  *   but apparently a few don't get set; catch them here. */
3947                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3948                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3949                         (pkt->hdr.cmd != REPLY_RX) &&
3950                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3951                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3952                         (pkt->hdr.cmd != REPLY_TX);
3953
3954                 /* Based on type of command response or notification,
3955                  *   handle those that need handling via function in
3956                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3957                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3958                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3959                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3960                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3961                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3962                 } else {
3963                         /* No handling needed */
3964                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3965                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3966                                 r, i, get_cmd_string(pkt->hdr.cmd),
3967                                 pkt->hdr.cmd);
3968                 }
3969
3970                 if (reclaim) {
3971                         /* Invoke any callbacks, transfer the skb to caller, and
3972                          * fire off the (possibly) blocking iwl_send_cmd()
3973                          * as we reclaim the driver command queue */
3974                         if (rxb && rxb->skb)
3975                                 iwl4965_tx_cmd_complete(priv, rxb);
3976                         else
3977                                 IWL_WARNING("Claim null rxb?\n");
3978                 }
3979
3980                 /* For now we just don't re-use anything.  We can tweak this
3981                  * later to try and re-use notification packets and SKBs that
3982                  * fail to Rx correctly */
3983                 if (rxb->skb != NULL) {
3984                         priv->alloc_rxb_skb--;
3985                         dev_kfree_skb_any(rxb->skb);
3986                         rxb->skb = NULL;
3987                 }
3988
3989                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3990                                  priv->hw_params.rx_buf_size,
3991                                  PCI_DMA_FROMDEVICE);
3992                 spin_lock_irqsave(&rxq->lock, flags);
3993                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3994                 spin_unlock_irqrestore(&rxq->lock, flags);
3995                 i = (i + 1) & RX_QUEUE_MASK;
3996                 /* If there are a lot of unused frames,
3997                  * restock the Rx queue so ucode wont assert. */
3998                 if (fill_rx) {
3999                         count++;
4000                         if (count >= 8) {
4001                                 priv->rxq.read = i;
4002                                 __iwl4965_rx_replenish(priv);
4003                                 count = 0;
4004                         }
4005                 }
4006         }
4007
4008         /* Backtrack one entry */
4009         priv->rxq.read = i;
4010         iwl4965_rx_queue_restock(priv);
4011 }
4012
4013 /**
4014  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4015  */
4016 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
4017                                   struct iwl4965_tx_queue *txq)
4018 {
4019         u32 reg = 0;
4020         int rc = 0;
4021         int txq_id = txq->q.id;
4022
4023         if (txq->need_update == 0)
4024                 return rc;
4025
4026         /* if we're trying to save power */
4027         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4028                 /* wake up nic if it's powered down ...
4029                  * uCode will wake up, and interrupt us again, so next
4030                  * time we'll skip this part. */
4031                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4032
4033                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4034                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4035                         iwl_set_bit(priv, CSR_GP_CNTRL,
4036                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4037                         return rc;
4038                 }
4039
4040                 /* restore this queue's parameters in nic hardware. */
4041                 rc = iwl_grab_nic_access(priv);
4042                 if (rc)
4043                         return rc;
4044                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
4045                                      txq->q.write_ptr | (txq_id << 8));
4046                 iwl_release_nic_access(priv);
4047
4048         /* else not in power-save mode, uCode will never sleep when we're
4049          * trying to tx (during RFKILL, we're not trying to tx). */
4050         } else
4051                 iwl_write32(priv, HBUS_TARG_WRPTR,
4052                             txq->q.write_ptr | (txq_id << 8));
4053
4054         txq->need_update = 0;
4055
4056         return rc;
4057 }
4058
4059 #ifdef CONFIG_IWLWIFI_DEBUG
4060 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4061 {
4062         DECLARE_MAC_BUF(mac);
4063
4064         IWL_DEBUG_RADIO("RX CONFIG:\n");
4065         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4066         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4067         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4068         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4069                         le32_to_cpu(rxon->filter_flags));
4070         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4071         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4072                         rxon->ofdm_basic_rates);
4073         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4074         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4075                         print_mac(mac, rxon->node_addr));
4076         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4077                         print_mac(mac, rxon->bssid_addr));
4078         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4079 }
4080 #endif
4081
4082 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
4083 {
4084         IWL_DEBUG_ISR("Enabling interrupts\n");
4085         set_bit(STATUS_INT_ENABLED, &priv->status);
4086         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4087 }
4088
4089 /* call this function to flush any scheduled tasklet */
4090 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
4091 {
4092         /* wait to make sure we flush pedding tasklet*/
4093         synchronize_irq(priv->pci_dev->irq);
4094         tasklet_kill(&priv->irq_tasklet);
4095 }
4096
4097 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
4098 {
4099         clear_bit(STATUS_INT_ENABLED, &priv->status);
4100
4101         /* disable interrupts from uCode/NIC to host */
4102         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4103
4104         /* acknowledge/clear/reset any interrupts still pending
4105          * from uCode or flow handler (Rx/Tx DMA) */
4106         iwl_write32(priv, CSR_INT, 0xffffffff);
4107         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4108         IWL_DEBUG_ISR("Disabled interrupts\n");
4109 }
4110
4111 static const char *desc_lookup(int i)
4112 {
4113         switch (i) {
4114         case 1:
4115                 return "FAIL";
4116         case 2:
4117                 return "BAD_PARAM";
4118         case 3:
4119                 return "BAD_CHECKSUM";
4120         case 4:
4121                 return "NMI_INTERRUPT";
4122         case 5:
4123                 return "SYSASSERT";
4124         case 6:
4125                 return "FATAL_ERROR";
4126         }
4127
4128         return "UNKNOWN";
4129 }
4130
4131 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4132 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4133
4134 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
4135 {
4136         u32 data2, line;
4137         u32 desc, time, count, base, data1;
4138         u32 blink1, blink2, ilink1, ilink2;
4139         int rc;
4140
4141         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4142
4143         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4144                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4145                 return;
4146         }
4147
4148         rc = iwl_grab_nic_access(priv);
4149         if (rc) {
4150                 IWL_WARNING("Can not read from adapter at this time.\n");
4151                 return;
4152         }
4153
4154         count = iwl_read_targ_mem(priv, base);
4155
4156         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4157                 IWL_ERROR("Start IWL Error Log Dump:\n");
4158                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4159         }
4160
4161         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4162         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4163         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4164         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4165         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4166         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4167         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4168         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4169         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4170
4171         IWL_ERROR("Desc               Time       "
4172                   "data1      data2      line\n");
4173         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4174                   desc_lookup(desc), desc, time, data1, data2, line);
4175         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4176         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4177                   ilink1, ilink2);
4178
4179         iwl_release_nic_access(priv);
4180 }
4181
4182 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4183
4184 /**
4185  * iwl4965_print_event_log - Dump error event log to syslog
4186  *
4187  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4188  */
4189 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4190                                 u32 num_events, u32 mode)
4191 {
4192         u32 i;
4193         u32 base;       /* SRAM byte address of event log header */
4194         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4195         u32 ptr;        /* SRAM byte address of log data */
4196         u32 ev, time, data; /* event log data */
4197
4198         if (num_events == 0)
4199                 return;
4200
4201         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4202
4203         if (mode == 0)
4204                 event_size = 2 * sizeof(u32);
4205         else
4206                 event_size = 3 * sizeof(u32);
4207
4208         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4209
4210         /* "time" is actually "data" for mode 0 (no timestamp).
4211          * place event id # at far right for easier visual parsing. */
4212         for (i = 0; i < num_events; i++) {
4213                 ev = iwl_read_targ_mem(priv, ptr);
4214                 ptr += sizeof(u32);
4215                 time = iwl_read_targ_mem(priv, ptr);
4216                 ptr += sizeof(u32);
4217                 if (mode == 0)
4218                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4219                 else {
4220                         data = iwl_read_targ_mem(priv, ptr);
4221                         ptr += sizeof(u32);
4222                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4223                 }
4224         }
4225 }
4226
4227 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4228 {
4229         int rc;
4230         u32 base;       /* SRAM byte address of event log header */
4231         u32 capacity;   /* event log capacity in # entries */
4232         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4233         u32 num_wraps;  /* # times uCode wrapped to top of log */
4234         u32 next_entry; /* index of next entry to be written by uCode */
4235         u32 size;       /* # entries that we'll print */
4236
4237         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4238         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4239                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4240                 return;
4241         }
4242
4243         rc = iwl_grab_nic_access(priv);
4244         if (rc) {
4245                 IWL_WARNING("Can not read from adapter at this time.\n");
4246                 return;
4247         }
4248
4249         /* event log header */
4250         capacity = iwl_read_targ_mem(priv, base);
4251         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4252         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4253         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4254
4255         size = num_wraps ? capacity : next_entry;
4256
4257         /* bail out if nothing in log */
4258         if (size == 0) {
4259                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4260                 iwl_release_nic_access(priv);
4261                 return;
4262         }
4263
4264         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4265                   size, num_wraps);
4266
4267         /* if uCode has wrapped back to top of log, start at the oldest entry,
4268          * i.e the next one that uCode would fill. */
4269         if (num_wraps)
4270                 iwl4965_print_event_log(priv, next_entry,
4271                                     capacity - next_entry, mode);
4272
4273         /* (then/else) start at top of log */
4274         iwl4965_print_event_log(priv, 0, next_entry, mode);
4275
4276         iwl_release_nic_access(priv);
4277 }
4278
4279 /**
4280  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4281  */
4282 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4283 {
4284         /* Set the FW error flag -- cleared on iwl4965_down */
4285         set_bit(STATUS_FW_ERROR, &priv->status);
4286
4287         /* Cancel currently queued command. */
4288         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4289
4290 #ifdef CONFIG_IWLWIFI_DEBUG
4291         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4292                 iwl4965_dump_nic_error_log(priv);
4293                 iwl4965_dump_nic_event_log(priv);
4294                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4295         }
4296 #endif
4297
4298         wake_up_interruptible(&priv->wait_command_queue);
4299
4300         /* Keep the restart process from trying to send host
4301          * commands by clearing the INIT status bit */
4302         clear_bit(STATUS_READY, &priv->status);
4303
4304         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4305                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4306                           "Restarting adapter due to uCode error.\n");
4307
4308                 if (iwl_is_associated(priv)) {
4309                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4310                                sizeof(priv->recovery_rxon));
4311                         priv->error_recovering = 1;
4312                 }
4313                 queue_work(priv->workqueue, &priv->restart);
4314         }
4315 }
4316
4317 static void iwl4965_error_recovery(struct iwl_priv *priv)
4318 {
4319         unsigned long flags;
4320
4321         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4322                sizeof(priv->staging_rxon));
4323         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4324         iwl4965_commit_rxon(priv);
4325
4326         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4327
4328         spin_lock_irqsave(&priv->lock, flags);
4329         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4330         priv->error_recovering = 0;
4331         spin_unlock_irqrestore(&priv->lock, flags);
4332 }
4333
4334 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4335 {
4336         u32 inta, handled = 0;
4337         u32 inta_fh;
4338         unsigned long flags;
4339 #ifdef CONFIG_IWLWIFI_DEBUG
4340         u32 inta_mask;
4341 #endif
4342
4343         spin_lock_irqsave(&priv->lock, flags);
4344
4345         /* Ack/clear/reset pending uCode interrupts.
4346          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4347          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4348         inta = iwl_read32(priv, CSR_INT);
4349         iwl_write32(priv, CSR_INT, inta);
4350
4351         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4352          * Any new interrupts that happen after this, either while we're
4353          * in this tasklet, or later, will show up in next ISR/tasklet. */
4354         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4355         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4356
4357 #ifdef CONFIG_IWLWIFI_DEBUG
4358         if (iwl_debug_level & IWL_DL_ISR) {
4359                 /* just for debug */
4360                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4361                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4362                               inta, inta_mask, inta_fh);
4363         }
4364 #endif
4365
4366         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4367          * atomic, make sure that inta covers all the interrupts that
4368          * we've discovered, even if FH interrupt came in just after
4369          * reading CSR_INT. */
4370         if (inta_fh & CSR49_FH_INT_RX_MASK)
4371                 inta |= CSR_INT_BIT_FH_RX;
4372         if (inta_fh & CSR49_FH_INT_TX_MASK)
4373                 inta |= CSR_INT_BIT_FH_TX;
4374
4375         /* Now service all interrupt bits discovered above. */
4376         if (inta & CSR_INT_BIT_HW_ERR) {
4377                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4378
4379                 /* Tell the device to stop sending interrupts */
4380                 iwl4965_disable_interrupts(priv);
4381
4382                 iwl4965_irq_handle_error(priv);
4383
4384                 handled |= CSR_INT_BIT_HW_ERR;
4385
4386                 spin_unlock_irqrestore(&priv->lock, flags);
4387
4388                 return;
4389         }
4390
4391 #ifdef CONFIG_IWLWIFI_DEBUG
4392         if (iwl_debug_level & (IWL_DL_ISR)) {
4393                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4394                 if (inta & CSR_INT_BIT_SCD)
4395                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4396                                       "the frame/frames.\n");
4397
4398                 /* Alive notification via Rx interrupt will do the real work */
4399                 if (inta & CSR_INT_BIT_ALIVE)
4400                         IWL_DEBUG_ISR("Alive interrupt\n");
4401         }
4402 #endif
4403         /* Safely ignore these bits for debug checks below */
4404         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4405
4406         /* HW RF KILL switch toggled */
4407         if (inta & CSR_INT_BIT_RF_KILL) {
4408                 int hw_rf_kill = 0;
4409                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4410                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4411                         hw_rf_kill = 1;
4412
4413                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4414                                 "RF_KILL bit toggled to %s.\n",
4415                                 hw_rf_kill ? "disable radio":"enable radio");
4416
4417                 /* Queue restart only if RF_KILL switch was set to "kill"
4418                  *   when we loaded driver, and is now set to "enable".
4419                  * After we're Alive, RF_KILL gets handled by
4420                  *   iwl4965_rx_card_state_notif() */
4421                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4422                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4423                         queue_work(priv->workqueue, &priv->restart);
4424                 }
4425
4426                 handled |= CSR_INT_BIT_RF_KILL;
4427         }
4428
4429         /* Chip got too hot and stopped itself */
4430         if (inta & CSR_INT_BIT_CT_KILL) {
4431                 IWL_ERROR("Microcode CT kill error detected.\n");
4432                 handled |= CSR_INT_BIT_CT_KILL;
4433         }
4434
4435         /* Error detected by uCode */
4436         if (inta & CSR_INT_BIT_SW_ERR) {
4437                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4438                           inta);
4439                 iwl4965_irq_handle_error(priv);
4440                 handled |= CSR_INT_BIT_SW_ERR;
4441         }
4442
4443         /* uCode wakes up after power-down sleep */
4444         if (inta & CSR_INT_BIT_WAKEUP) {
4445                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4446                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4447                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4448                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4449                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4450                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4451                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4452                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4453
4454                 handled |= CSR_INT_BIT_WAKEUP;
4455         }
4456
4457         /* All uCode command responses, including Tx command responses,
4458          * Rx "responses" (frame-received notification), and other
4459          * notifications from uCode come through here*/
4460         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4461                 iwl4965_rx_handle(priv);
4462                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4463         }
4464
4465         if (inta & CSR_INT_BIT_FH_TX) {
4466                 IWL_DEBUG_ISR("Tx interrupt\n");
4467                 handled |= CSR_INT_BIT_FH_TX;
4468         }
4469
4470         if (inta & ~handled)
4471                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4472
4473         if (inta & ~CSR_INI_SET_MASK) {
4474                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4475                          inta & ~CSR_INI_SET_MASK);
4476                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4477         }
4478
4479         /* Re-enable all interrupts */
4480         /* only Re-enable if diabled by irq */
4481         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4482                 iwl4965_enable_interrupts(priv);
4483
4484 #ifdef CONFIG_IWLWIFI_DEBUG
4485         if (iwl_debug_level & (IWL_DL_ISR)) {
4486                 inta = iwl_read32(priv, CSR_INT);
4487                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4488                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4489                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4490                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4491         }
4492 #endif
4493         spin_unlock_irqrestore(&priv->lock, flags);
4494 }
4495
4496 static irqreturn_t iwl4965_isr(int irq, void *data)
4497 {
4498         struct iwl_priv *priv = data;
4499         u32 inta, inta_mask;
4500         u32 inta_fh;
4501         if (!priv)
4502                 return IRQ_NONE;
4503
4504         spin_lock(&priv->lock);
4505
4506         /* Disable (but don't clear!) interrupts here to avoid
4507          *    back-to-back ISRs and sporadic interrupts from our NIC.
4508          * If we have something to service, the tasklet will re-enable ints.
4509          * If we *don't* have something, we'll re-enable before leaving here. */
4510         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4511         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4512
4513         /* Discover which interrupts are active/pending */
4514         inta = iwl_read32(priv, CSR_INT);
4515         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4516
4517         /* Ignore interrupt if there's nothing in NIC to service.
4518          * This may be due to IRQ shared with another device,
4519          * or due to sporadic interrupts thrown from our NIC. */
4520         if (!inta && !inta_fh) {
4521                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4522                 goto none;
4523         }
4524
4525         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4526                 /* Hardware disappeared. It might have already raised
4527                  * an interrupt */
4528                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4529                 goto unplugged;
4530         }
4531
4532         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4533                       inta, inta_mask, inta_fh);
4534
4535         inta &= ~CSR_INT_BIT_SCD;
4536
4537         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4538         if (likely(inta || inta_fh))
4539                 tasklet_schedule(&priv->irq_tasklet);
4540
4541  unplugged:
4542         spin_unlock(&priv->lock);
4543         return IRQ_HANDLED;
4544
4545  none:
4546         /* re-enable interrupts here since we don't have anything to service. */
4547         /* only Re-enable if diabled by irq */
4548         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4549                 iwl4965_enable_interrupts(priv);
4550         spin_unlock(&priv->lock);
4551         return IRQ_NONE;
4552 }
4553
4554 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4555  * sending probe req.  This should be set long enough to hear probe responses
4556  * from more than one AP.  */
4557 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4558 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4559
4560 /* For faster active scanning, scan will move to the next channel if fewer than
4561  * PLCP_QUIET_THRESH packets are heard on this channel within
4562  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4563  * time if it's a quiet channel (nothing responded to our probe, and there's
4564  * no other traffic).
4565  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4566 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4567 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4568
4569 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4570  * Must be set longer than active dwell time.
4571  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4572 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4573 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4574 #define IWL_PASSIVE_DWELL_BASE      (100)
4575 #define IWL_CHANNEL_TUNE_TIME       5
4576
4577 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4578                                                 enum ieee80211_band band)
4579 {
4580         if (band == IEEE80211_BAND_5GHZ)
4581                 return IWL_ACTIVE_DWELL_TIME_52;
4582         else
4583                 return IWL_ACTIVE_DWELL_TIME_24;
4584 }
4585
4586 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4587                                           enum ieee80211_band band)
4588 {
4589         u16 active = iwl4965_get_active_dwell_time(priv, band);
4590         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4591             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4592             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4593
4594         if (iwl_is_associated(priv)) {
4595                 /* If we're associated, we clamp the maximum passive
4596                  * dwell time to be 98% of the beacon interval (minus
4597                  * 2 * channel tune time) */
4598                 passive = priv->beacon_int;
4599                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4600                         passive = IWL_PASSIVE_DWELL_BASE;
4601                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4602         }
4603
4604         if (passive <= active)
4605                 passive = active + 1;
4606
4607         return passive;
4608 }
4609
4610 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4611                                          enum ieee80211_band band,
4612                                      u8 is_active, u8 direct_mask,
4613                                      struct iwl4965_scan_channel *scan_ch)
4614 {
4615         const struct ieee80211_channel *channels = NULL;
4616         const struct ieee80211_supported_band *sband;
4617         const struct iwl_channel_info *ch_info;
4618         u16 passive_dwell = 0;
4619         u16 active_dwell = 0;
4620         int added, i;
4621
4622         sband = iwl4965_get_hw_mode(priv, band);
4623         if (!sband)
4624                 return 0;
4625
4626         channels = sband->channels;
4627
4628         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4629         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4630
4631         for (i = 0, added = 0; i < sband->n_channels; i++) {
4632                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4633                         continue;
4634
4635                 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
4636                     le16_to_cpu(priv->active_rxon.channel)) {
4637                         if (iwl_is_associated(priv)) {
4638                                 IWL_DEBUG_SCAN
4639                                     ("Skipping current channel %d\n",
4640                                      le16_to_cpu(priv->active_rxon.channel));
4641                                 continue;
4642                         }
4643                 } else if (priv->only_active_channel)
4644                         continue;
4645
4646                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4647
4648                 ch_info = iwl_get_channel_info(priv, band,
4649                                          scan_ch->channel);
4650                 if (!is_channel_valid(ch_info)) {
4651                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4652                                        scan_ch->channel);
4653                         continue;
4654                 }
4655
4656                 if (!is_active || is_channel_passive(ch_info) ||
4657                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4658                         scan_ch->type = 0;      /* passive */
4659                 else
4660                         scan_ch->type = 1;      /* active */
4661
4662                 if (scan_ch->type & 1)
4663                         scan_ch->type |= (direct_mask << 1);
4664
4665                 if (is_channel_narrow(ch_info))
4666                         scan_ch->type |= (1 << 7);
4667
4668                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4669                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4670
4671                 /* Set txpower levels to defaults */
4672                 scan_ch->tpc.dsp_atten = 110;
4673                 /* scan_pwr_info->tpc.dsp_atten; */
4674
4675                 /*scan_pwr_info->tpc.tx_gain; */
4676                 if (band == IEEE80211_BAND_5GHZ)
4677                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4678                 else {
4679                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4680                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4681                          * power level:
4682                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4683                          */
4684                 }
4685
4686                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4687                                scan_ch->channel,
4688                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4689                                (scan_ch->type & 1) ?
4690                                active_dwell : passive_dwell);
4691
4692                 scan_ch++;
4693                 added++;
4694         }
4695
4696         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4697         return added;
4698 }
4699
4700 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4701                               struct ieee80211_rate *rates)
4702 {
4703         int i;
4704
4705         for (i = 0; i < IWL_RATE_COUNT; i++) {
4706                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4707                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4708                 rates[i].hw_value_short = i;
4709                 rates[i].flags = 0;
4710                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4711                         /*
4712                          * If CCK != 1M then set short preamble rate flag.
4713                          */
4714                         rates[i].flags |=
4715                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4716                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
4717                 }
4718         }
4719 }
4720
4721 /**
4722  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4723  */
4724 int iwl4965_init_geos(struct iwl_priv *priv)
4725 {
4726         struct iwl_channel_info *ch;
4727         struct ieee80211_supported_band *sband;
4728         struct ieee80211_channel *channels;
4729         struct ieee80211_channel *geo_ch;
4730         struct ieee80211_rate *rates;
4731         int i = 0;
4732
4733         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4734             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4735                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4736                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4737                 return 0;
4738         }
4739
4740         channels = kzalloc(sizeof(struct ieee80211_channel) *
4741                            priv->channel_count, GFP_KERNEL);
4742         if (!channels)
4743                 return -ENOMEM;
4744
4745         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4746                         GFP_KERNEL);
4747         if (!rates) {
4748                 kfree(channels);
4749                 return -ENOMEM;
4750         }
4751
4752         /* 5.2GHz channels start after the 2.4GHz channels */
4753         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4754         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4755         /* just OFDM */
4756         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4757         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4758
4759         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4760
4761         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4762         sband->channels = channels;
4763         /* OFDM & CCK */
4764         sband->bitrates = rates;
4765         sband->n_bitrates = IWL_RATE_COUNT;
4766
4767         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4768
4769         priv->ieee_channels = channels;
4770         priv->ieee_rates = rates;
4771
4772         iwl4965_init_hw_rates(priv, rates);
4773
4774         for (i = 0;  i < priv->channel_count; i++) {
4775                 ch = &priv->channel_info[i];
4776
4777                 /* FIXME: might be removed if scan is OK */
4778                 if (!is_channel_valid(ch))
4779                         continue;
4780
4781                 if (is_channel_a_band(ch))
4782                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4783                 else
4784                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4785
4786                 geo_ch = &sband->channels[sband->n_channels++];
4787
4788                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4789                 geo_ch->max_power = ch->max_power_avg;
4790                 geo_ch->max_antenna_gain = 0xff;
4791                 geo_ch->hw_value = ch->channel;
4792
4793                 if (is_channel_valid(ch)) {
4794                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4795                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4796
4797                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4798                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4799
4800                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4801                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4802
4803                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4804                                 priv->max_channel_txpower_limit =
4805                                     ch->max_power_avg;
4806                 } else {
4807                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4808                 }
4809
4810                 /* Save flags for reg domain usage */
4811                 geo_ch->orig_flags = geo_ch->flags;
4812
4813                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4814                                 ch->channel, geo_ch->center_freq,
4815                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4816                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4817                                 "restricted" : "valid",
4818                                  geo_ch->flags);
4819         }
4820
4821         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4822              priv->cfg->sku & IWL_SKU_A) {
4823                 printk(KERN_INFO DRV_NAME
4824                        ": Incorrectly detected BG card as ABG.  Please send "
4825                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4826                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4827                 priv->cfg->sku &= ~IWL_SKU_A;
4828         }
4829
4830         printk(KERN_INFO DRV_NAME
4831                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4832                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4833                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4834
4835         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4836                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4837                         &priv->bands[IEEE80211_BAND_2GHZ];
4838         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4839                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4840                         &priv->bands[IEEE80211_BAND_5GHZ];
4841
4842         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4843
4844         return 0;
4845 }
4846
4847 /*
4848  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
4849  */
4850 void iwl4965_free_geos(struct iwl_priv *priv)
4851 {
4852         kfree(priv->ieee_channels);
4853         kfree(priv->ieee_rates);
4854         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4855 }
4856
4857 /******************************************************************************
4858  *
4859  * uCode download functions
4860  *
4861  ******************************************************************************/
4862
4863 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4864 {
4865         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4866         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4867         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4868         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4869         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4870         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4871 }
4872
4873 /**
4874  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
4875  *     looking at all data.
4876  */
4877 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
4878                                  u32 len)
4879 {
4880         u32 val;
4881         u32 save_len = len;
4882         int rc = 0;
4883         u32 errcnt;
4884
4885         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4886
4887         rc = iwl_grab_nic_access(priv);
4888         if (rc)
4889                 return rc;
4890
4891         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
4892
4893         errcnt = 0;
4894         for (; len > 0; len -= sizeof(u32), image++) {
4895                 /* read data comes through single port, auto-incr addr */
4896                 /* NOTE: Use the debugless read so we don't flood kernel log
4897                  * if IWL_DL_IO is set */
4898                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4899                 if (val != le32_to_cpu(*image)) {
4900                         IWL_ERROR("uCode INST section is invalid at "
4901                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4902                                   save_len - len, val, le32_to_cpu(*image));
4903                         rc = -EIO;
4904                         errcnt++;
4905                         if (errcnt >= 20)
4906                                 break;
4907                 }
4908         }
4909
4910         iwl_release_nic_access(priv);
4911
4912         if (!errcnt)
4913                 IWL_DEBUG_INFO
4914                     ("ucode image in INSTRUCTION memory is good\n");
4915
4916         return rc;
4917 }
4918
4919
4920 /**
4921  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
4922  *   using sample data 100 bytes apart.  If these sample points are good,
4923  *   it's a pretty good bet that everything between them is good, too.
4924  */
4925 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4926 {
4927         u32 val;
4928         int rc = 0;
4929         u32 errcnt = 0;
4930         u32 i;
4931
4932         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4933
4934         rc = iwl_grab_nic_access(priv);
4935         if (rc)
4936                 return rc;
4937
4938         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4939                 /* read data comes through single port, auto-incr addr */
4940                 /* NOTE: Use the debugless read so we don't flood kernel log
4941                  * if IWL_DL_IO is set */
4942                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4943                         i + RTC_INST_LOWER_BOUND);
4944                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4945                 if (val != le32_to_cpu(*image)) {
4946 #if 0 /* Enable this if you want to see details */
4947                         IWL_ERROR("uCode INST section is invalid at "
4948                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4949                                   i, val, *image);
4950 #endif
4951                         rc = -EIO;
4952                         errcnt++;
4953                         if (errcnt >= 3)
4954                                 break;
4955                 }
4956         }
4957
4958         iwl_release_nic_access(priv);
4959
4960         return rc;
4961 }
4962
4963
4964 /**
4965  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
4966  *    and verify its contents
4967  */
4968 static int iwl4965_verify_ucode(struct iwl_priv *priv)
4969 {
4970         __le32 *image;
4971         u32 len;
4972         int rc = 0;
4973
4974         /* Try bootstrap */
4975         image = (__le32 *)priv->ucode_boot.v_addr;
4976         len = priv->ucode_boot.len;
4977         rc = iwl4965_verify_inst_sparse(priv, image, len);
4978         if (rc == 0) {
4979                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
4980                 return 0;
4981         }
4982
4983         /* Try initialize */
4984         image = (__le32 *)priv->ucode_init.v_addr;
4985         len = priv->ucode_init.len;
4986         rc = iwl4965_verify_inst_sparse(priv, image, len);
4987         if (rc == 0) {
4988                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
4989                 return 0;
4990         }
4991
4992         /* Try runtime/protocol */
4993         image = (__le32 *)priv->ucode_code.v_addr;
4994         len = priv->ucode_code.len;
4995         rc = iwl4965_verify_inst_sparse(priv, image, len);
4996         if (rc == 0) {
4997                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
4998                 return 0;
4999         }
5000
5001         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5002
5003         /* Since nothing seems to match, show first several data entries in
5004          * instruction SRAM, so maybe visual inspection will give a clue.
5005          * Selection of bootstrap image (vs. other images) is arbitrary. */
5006         image = (__le32 *)priv->ucode_boot.v_addr;
5007         len = priv->ucode_boot.len;
5008         rc = iwl4965_verify_inst_full(priv, image, len);
5009
5010         return rc;
5011 }
5012
5013 static void iwl4965_nic_start(struct iwl_priv *priv)
5014 {
5015         /* Remove all resets to allow NIC to operate */
5016         iwl_write32(priv, CSR_RESET, 0);
5017 }
5018
5019
5020 /**
5021  * iwl4965_read_ucode - Read uCode images from disk file.
5022  *
5023  * Copy into buffers for card to fetch via bus-mastering
5024  */
5025 static int iwl4965_read_ucode(struct iwl_priv *priv)
5026 {
5027         struct iwl4965_ucode *ucode;
5028         int ret;
5029         const struct firmware *ucode_raw;
5030         const char *name = priv->cfg->fw_name;
5031         u8 *src;
5032         size_t len;
5033         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5034
5035         /* Ask kernel firmware_class module to get the boot firmware off disk.
5036          * request_firmware() is synchronous, file is in memory on return. */
5037         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5038         if (ret < 0) {
5039                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5040                                         name, ret);
5041                 goto error;
5042         }
5043
5044         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5045                        name, ucode_raw->size);
5046
5047         /* Make sure that we got at least our header! */
5048         if (ucode_raw->size < sizeof(*ucode)) {
5049                 IWL_ERROR("File size way too small!\n");
5050                 ret = -EINVAL;
5051                 goto err_release;
5052         }
5053
5054         /* Data from ucode file:  header followed by uCode images */
5055         ucode = (void *)ucode_raw->data;
5056
5057         ver = le32_to_cpu(ucode->ver);
5058         inst_size = le32_to_cpu(ucode->inst_size);
5059         data_size = le32_to_cpu(ucode->data_size);
5060         init_size = le32_to_cpu(ucode->init_size);
5061         init_data_size = le32_to_cpu(ucode->init_data_size);
5062         boot_size = le32_to_cpu(ucode->boot_size);
5063
5064         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5065         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5066                        inst_size);
5067         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5068                        data_size);
5069         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5070                        init_size);
5071         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5072                        init_data_size);
5073         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5074                        boot_size);
5075
5076         /* Verify size of file vs. image size info in file's header */
5077         if (ucode_raw->size < sizeof(*ucode) +
5078                 inst_size + data_size + init_size +
5079                 init_data_size + boot_size) {
5080
5081                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5082                                (int)ucode_raw->size);
5083                 ret = -EINVAL;
5084                 goto err_release;
5085         }
5086
5087         /* Verify that uCode images will fit in card's SRAM */
5088         if (inst_size > IWL_MAX_INST_SIZE) {
5089                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5090                                inst_size);
5091                 ret = -EINVAL;
5092                 goto err_release;
5093         }
5094
5095         if (data_size > IWL_MAX_DATA_SIZE) {
5096                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5097                                 data_size);
5098                 ret = -EINVAL;
5099                 goto err_release;
5100         }
5101         if (init_size > IWL_MAX_INST_SIZE) {
5102                 IWL_DEBUG_INFO
5103                     ("uCode init instr len %d too large to fit in\n",
5104                       init_size);
5105                 ret = -EINVAL;
5106                 goto err_release;
5107         }
5108         if (init_data_size > IWL_MAX_DATA_SIZE) {
5109                 IWL_DEBUG_INFO
5110                     ("uCode init data len %d too large to fit in\n",
5111                       init_data_size);
5112                 ret = -EINVAL;
5113                 goto err_release;
5114         }
5115         if (boot_size > IWL_MAX_BSM_SIZE) {
5116                 IWL_DEBUG_INFO
5117                     ("uCode boot instr len %d too large to fit in\n",
5118                       boot_size);
5119                 ret = -EINVAL;
5120                 goto err_release;
5121         }
5122
5123         /* Allocate ucode buffers for card's bus-master loading ... */
5124
5125         /* Runtime instructions and 2 copies of data:
5126          * 1) unmodified from disk
5127          * 2) backup cache for save/restore during power-downs */
5128         priv->ucode_code.len = inst_size;
5129         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5130
5131         priv->ucode_data.len = data_size;
5132         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5133
5134         priv->ucode_data_backup.len = data_size;
5135         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5136
5137         /* Initialization instructions and data */
5138         if (init_size && init_data_size) {
5139                 priv->ucode_init.len = init_size;
5140                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5141
5142                 priv->ucode_init_data.len = init_data_size;
5143                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5144
5145                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5146                         goto err_pci_alloc;
5147         }
5148
5149         /* Bootstrap (instructions only, no data) */
5150         if (boot_size) {
5151                 priv->ucode_boot.len = boot_size;
5152                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5153
5154                 if (!priv->ucode_boot.v_addr)
5155                         goto err_pci_alloc;
5156         }
5157
5158         /* Copy images into buffers for card's bus-master reads ... */
5159
5160         /* Runtime instructions (first block of data in file) */
5161         src = &ucode->data[0];
5162         len = priv->ucode_code.len;
5163         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5164         memcpy(priv->ucode_code.v_addr, src, len);
5165         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5166                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5167
5168         /* Runtime data (2nd block)
5169          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
5170         src = &ucode->data[inst_size];
5171         len = priv->ucode_data.len;
5172         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5173         memcpy(priv->ucode_data.v_addr, src, len);
5174         memcpy(priv->ucode_data_backup.v_addr, src, len);
5175
5176         /* Initialization instructions (3rd block) */
5177         if (init_size) {
5178                 src = &ucode->data[inst_size + data_size];
5179                 len = priv->ucode_init.len;
5180                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5181                                 len);
5182                 memcpy(priv->ucode_init.v_addr, src, len);
5183         }
5184
5185         /* Initialization data (4th block) */
5186         if (init_data_size) {
5187                 src = &ucode->data[inst_size + data_size + init_size];
5188                 len = priv->ucode_init_data.len;
5189                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
5190                                len);
5191                 memcpy(priv->ucode_init_data.v_addr, src, len);
5192         }
5193
5194         /* Bootstrap instructions (5th block) */
5195         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5196         len = priv->ucode_boot.len;
5197         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5198         memcpy(priv->ucode_boot.v_addr, src, len);
5199
5200         /* We have our copies now, allow OS release its copies */
5201         release_firmware(ucode_raw);
5202         return 0;
5203
5204  err_pci_alloc:
5205         IWL_ERROR("failed to allocate pci memory\n");
5206         ret = -ENOMEM;
5207         iwl4965_dealloc_ucode_pci(priv);
5208
5209  err_release:
5210         release_firmware(ucode_raw);
5211
5212  error:
5213         return ret;
5214 }
5215
5216
5217 /**
5218  * iwl4965_set_ucode_ptrs - Set uCode address location
5219  *
5220  * Tell initialization uCode where to find runtime uCode.
5221  *
5222  * BSM registers initially contain pointers to initialization uCode.
5223  * We need to replace them to load runtime uCode inst and data,
5224  * and to save runtime data when powering down.
5225  */
5226 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5227 {
5228         dma_addr_t pinst;
5229         dma_addr_t pdata;
5230         int rc = 0;
5231         unsigned long flags;
5232
5233         /* bits 35:4 for 4965 */
5234         pinst = priv->ucode_code.p_addr >> 4;
5235         pdata = priv->ucode_data_backup.p_addr >> 4;
5236
5237         spin_lock_irqsave(&priv->lock, flags);
5238         rc = iwl_grab_nic_access(priv);
5239         if (rc) {
5240                 spin_unlock_irqrestore(&priv->lock, flags);
5241                 return rc;
5242         }
5243
5244         /* Tell bootstrap uCode where to find image to load */
5245         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5246         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5247         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5248                                  priv->ucode_data.len);
5249
5250         /* Inst bytecount must be last to set up, bit 31 signals uCode
5251          *   that all new ptr/size info is in place */
5252         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5253                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5254
5255         iwl_release_nic_access(priv);
5256
5257         spin_unlock_irqrestore(&priv->lock, flags);
5258
5259         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5260
5261         return rc;
5262 }
5263
5264 /**
5265  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5266  *
5267  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5268  *
5269  * The 4965 "initialize" ALIVE reply contains calibration data for:
5270  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
5271  *   (3945 does not contain this data).
5272  *
5273  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5274 */
5275 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5276 {
5277         /* Check alive response for "valid" sign from uCode */
5278         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5279                 /* We had an error bringing up the hardware, so take it
5280                  * all the way back down so we can try again */
5281                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5282                 goto restart;
5283         }
5284
5285         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5286          * This is a paranoid check, because we would not have gotten the
5287          * "initialize" alive if code weren't properly loaded.  */
5288         if (iwl4965_verify_ucode(priv)) {
5289                 /* Runtime instruction load was bad;
5290                  * take it all the way back down so we can try again */
5291                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5292                 goto restart;
5293         }
5294
5295         /* Calculate temperature */
5296         priv->temperature = iwl4965_get_temperature(priv);
5297
5298         /* Send pointers to protocol/runtime uCode image ... init code will
5299          * load and launch runtime uCode, which will send us another "Alive"
5300          * notification. */
5301         IWL_DEBUG_INFO("Initialization Alive received.\n");
5302         if (iwl4965_set_ucode_ptrs(priv)) {
5303                 /* Runtime instruction load won't happen;
5304                  * take it all the way back down so we can try again */
5305                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5306                 goto restart;
5307         }
5308         return;
5309
5310  restart:
5311         queue_work(priv->workqueue, &priv->restart);
5312 }
5313
5314
5315 /**
5316  * iwl4965_alive_start - called after REPLY_ALIVE notification received
5317  *                   from protocol/runtime uCode (initialization uCode's
5318  *                   Alive gets handled by iwl4965_init_alive_start()).
5319  */
5320 static void iwl4965_alive_start(struct iwl_priv *priv)
5321 {
5322         int ret = 0;
5323
5324         IWL_DEBUG_INFO("Runtime Alive received.\n");
5325
5326         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5327                 /* We had an error bringing up the hardware, so take it
5328                  * all the way back down so we can try again */
5329                 IWL_DEBUG_INFO("Alive failed.\n");
5330                 goto restart;
5331         }
5332
5333         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5334          * This is a paranoid check, because we would not have gotten the
5335          * "runtime" alive if code weren't properly loaded.  */
5336         if (iwl4965_verify_ucode(priv)) {
5337                 /* Runtime instruction load was bad;
5338                  * take it all the way back down so we can try again */
5339                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5340                 goto restart;
5341         }
5342
5343         iwlcore_clear_stations_table(priv);
5344
5345         ret = priv->cfg->ops->lib->alive_notify(priv);
5346         if (ret) {
5347                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5348                             ret);
5349                 goto restart;
5350         }
5351
5352         /* After the ALIVE response, we can send host commands to 4965 uCode */
5353         set_bit(STATUS_ALIVE, &priv->status);
5354
5355         /* Clear out the uCode error bit if it is set */
5356         clear_bit(STATUS_FW_ERROR, &priv->status);
5357
5358         if (iwl_is_rfkill(priv))
5359                 return;
5360
5361         ieee80211_start_queues(priv->hw);
5362
5363         priv->active_rate = priv->rates_mask;
5364         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5365
5366         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5367
5368         if (iwl_is_associated(priv)) {
5369                 struct iwl4965_rxon_cmd *active_rxon =
5370                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5371
5372                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5373                        sizeof(priv->staging_rxon));
5374                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5375         } else {
5376                 /* Initialize our rx_config data */
5377                 iwl4965_connection_init_rx_config(priv);
5378                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5379         }
5380
5381         /* Configure Bluetooth device coexistence support */
5382         iwl4965_send_bt_config(priv);
5383
5384         /* Configure the adapter for unassociated operation */
5385         iwl4965_commit_rxon(priv);
5386
5387         /* At this point, the NIC is initialized and operational */
5388         priv->notif_missed_beacons = 0;
5389
5390         iwl4965_rf_kill_ct_config(priv);
5391
5392         iwl_leds_register(priv);
5393
5394         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5395         set_bit(STATUS_READY, &priv->status);
5396         wake_up_interruptible(&priv->wait_command_queue);
5397
5398         if (priv->error_recovering)
5399                 iwl4965_error_recovery(priv);
5400
5401         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5402         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5403         return;
5404
5405  restart:
5406         queue_work(priv->workqueue, &priv->restart);
5407 }
5408
5409 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5410
5411 static void __iwl4965_down(struct iwl_priv *priv)
5412 {
5413         unsigned long flags;
5414         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5415         struct ieee80211_conf *conf = NULL;
5416
5417         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5418
5419         conf = ieee80211_get_hw_conf(priv->hw);
5420
5421         if (!exit_pending)
5422                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5423
5424         iwl_leds_unregister(priv);
5425
5426         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5427
5428         iwlcore_clear_stations_table(priv);
5429
5430         /* Unblock any waiting calls */
5431         wake_up_interruptible_all(&priv->wait_command_queue);
5432
5433         /* Wipe out the EXIT_PENDING status bit if we are not actually
5434          * exiting the module */
5435         if (!exit_pending)
5436                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5437
5438         /* stop and reset the on-board processor */
5439         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5440
5441         /* tell the device to stop sending interrupts */
5442         spin_lock_irqsave(&priv->lock, flags);
5443         iwl4965_disable_interrupts(priv);
5444         spin_unlock_irqrestore(&priv->lock, flags);
5445         iwl_synchronize_irq(priv);
5446
5447         if (priv->mac80211_registered)
5448                 ieee80211_stop_queues(priv->hw);
5449
5450         /* If we have not previously called iwl4965_init() then
5451          * clear all bits but the RF Kill and SUSPEND bits and return */
5452         if (!iwl_is_init(priv)) {
5453                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5454                                         STATUS_RF_KILL_HW |
5455                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5456                                         STATUS_RF_KILL_SW |
5457                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5458                                         STATUS_GEO_CONFIGURED |
5459                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5460                                         STATUS_IN_SUSPEND;
5461                 goto exit;
5462         }
5463
5464         /* ...otherwise clear out all the status bits but the RF Kill and
5465          * SUSPEND bits and continue taking the NIC down. */
5466         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5467                                 STATUS_RF_KILL_HW |
5468                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5469                                 STATUS_RF_KILL_SW |
5470                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5471                                 STATUS_GEO_CONFIGURED |
5472                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5473                                 STATUS_IN_SUSPEND |
5474                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5475                                 STATUS_FW_ERROR;
5476
5477         spin_lock_irqsave(&priv->lock, flags);
5478         iwl_clear_bit(priv, CSR_GP_CNTRL,
5479                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5480         spin_unlock_irqrestore(&priv->lock, flags);
5481
5482         iwl4965_hw_txq_ctx_stop(priv);
5483         iwl4965_hw_rxq_stop(priv);
5484
5485         spin_lock_irqsave(&priv->lock, flags);
5486         if (!iwl_grab_nic_access(priv)) {
5487                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5488                                          APMG_CLK_VAL_DMA_CLK_RQT);
5489                 iwl_release_nic_access(priv);
5490         }
5491         spin_unlock_irqrestore(&priv->lock, flags);
5492
5493         udelay(5);
5494
5495         iwl4965_hw_nic_stop_master(priv);
5496         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5497         iwl4965_hw_nic_reset(priv);
5498
5499  exit:
5500         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5501
5502         if (priv->ibss_beacon)
5503                 dev_kfree_skb(priv->ibss_beacon);
5504         priv->ibss_beacon = NULL;
5505
5506         /* clear out any free frames */
5507         iwl4965_clear_free_frames(priv);
5508 }
5509
5510 static void iwl4965_down(struct iwl_priv *priv)
5511 {
5512         mutex_lock(&priv->mutex);
5513         __iwl4965_down(priv);
5514         mutex_unlock(&priv->mutex);
5515
5516         iwl4965_cancel_deferred_work(priv);
5517 }
5518
5519 #define MAX_HW_RESTARTS 5
5520
5521 static int __iwl4965_up(struct iwl_priv *priv)
5522 {
5523         int i;
5524         int ret;
5525
5526         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5527                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5528                 return -EIO;
5529         }
5530
5531         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5532                 IWL_WARNING("Radio disabled by SW RF kill (module "
5533                             "parameter)\n");
5534                 iwl_rfkill_set_hw_state(priv);
5535                 return -ENODEV;
5536         }
5537
5538         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5539                 IWL_ERROR("ucode not available for device bringup\n");
5540                 return -EIO;
5541         }
5542
5543         /* If platform's RF_KILL switch is NOT set to KILL */
5544         if (iwl_read32(priv, CSR_GP_CNTRL) &
5545                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5546                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5547         else {
5548                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5549                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5550                         iwl_rfkill_set_hw_state(priv);
5551                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5552                         return -ENODEV;
5553                 }
5554         }
5555
5556         iwl_rfkill_set_hw_state(priv);
5557         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5558
5559         ret = priv->cfg->ops->lib->hw_nic_init(priv);
5560         if (ret) {
5561                 IWL_ERROR("Unable to init nic\n");
5562                 return ret;
5563         }
5564
5565         /* make sure rfkill handshake bits are cleared */
5566         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5567         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5568                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5569
5570         /* clear (again), then enable host interrupts */
5571         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5572         iwl4965_enable_interrupts(priv);
5573
5574         /* really make sure rfkill handshake bits are cleared */
5575         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5576         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5577
5578         /* Copy original ucode data image from disk into backup cache.
5579          * This will be used to initialize the on-board processor's
5580          * data SRAM for a clean start when the runtime program first loads. */
5581         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5582                priv->ucode_data.len);
5583
5584         /* We return success when we resume from suspend and rf_kill is on. */
5585         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5586                 return 0;
5587
5588         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5589
5590                 iwlcore_clear_stations_table(priv);
5591
5592                 /* load bootstrap state machine,
5593                  * load bootstrap program into processor's memory,
5594                  * prepare to load the "initialize" uCode */
5595                 ret = priv->cfg->ops->lib->load_ucode(priv);
5596
5597                 if (ret) {
5598                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5599                         continue;
5600                 }
5601
5602                 /* start card; "initialize" will load runtime ucode */
5603                 iwl4965_nic_start(priv);
5604
5605                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5606
5607                 return 0;
5608         }
5609
5610         set_bit(STATUS_EXIT_PENDING, &priv->status);
5611         __iwl4965_down(priv);
5612
5613         /* tried to restart and config the device for as long as our
5614          * patience could withstand */
5615         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5616         return -EIO;
5617 }
5618
5619
5620 /*****************************************************************************
5621  *
5622  * Workqueue callbacks
5623  *
5624  *****************************************************************************/
5625
5626 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5627 {
5628         struct iwl_priv *priv =
5629             container_of(data, struct iwl_priv, init_alive_start.work);
5630
5631         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5632                 return;
5633
5634         mutex_lock(&priv->mutex);
5635         iwl4965_init_alive_start(priv);
5636         mutex_unlock(&priv->mutex);
5637 }
5638
5639 static void iwl4965_bg_alive_start(struct work_struct *data)
5640 {
5641         struct iwl_priv *priv =
5642             container_of(data, struct iwl_priv, alive_start.work);
5643
5644         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5645                 return;
5646
5647         mutex_lock(&priv->mutex);
5648         iwl4965_alive_start(priv);
5649         mutex_unlock(&priv->mutex);
5650 }
5651
5652 static void iwl4965_bg_rf_kill(struct work_struct *work)
5653 {
5654         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5655
5656         wake_up_interruptible(&priv->wait_command_queue);
5657
5658         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5659                 return;
5660
5661         mutex_lock(&priv->mutex);
5662
5663         if (!iwl_is_rfkill(priv)) {
5664                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5665                           "HW and/or SW RF Kill no longer active, restarting "
5666                           "device\n");
5667                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5668                         queue_work(priv->workqueue, &priv->restart);
5669         } else {
5670                 /* make sure mac80211 stop sending Tx frame */
5671                 if (priv->mac80211_registered)
5672                         ieee80211_stop_queues(priv->hw);
5673
5674                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5675                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5676                                           "disabled by SW switch\n");
5677                 else
5678                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5679                                     "Kill switch must be turned off for "
5680                                     "wireless networking to work.\n");
5681         }
5682         iwl_rfkill_set_hw_state(priv);
5683
5684         mutex_unlock(&priv->mutex);
5685 }
5686
5687 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5688
5689 static void iwl4965_bg_scan_check(struct work_struct *data)
5690 {
5691         struct iwl_priv *priv =
5692             container_of(data, struct iwl_priv, scan_check.work);
5693
5694         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5695                 return;
5696
5697         mutex_lock(&priv->mutex);
5698         if (test_bit(STATUS_SCANNING, &priv->status) ||
5699             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5700                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5701                           "Scan completion watchdog resetting adapter (%dms)\n",
5702                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5703
5704                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5705                         iwl4965_send_scan_abort(priv);
5706         }
5707         mutex_unlock(&priv->mutex);
5708 }
5709
5710 static void iwl4965_bg_request_scan(struct work_struct *data)
5711 {
5712         struct iwl_priv *priv =
5713             container_of(data, struct iwl_priv, request_scan);
5714         struct iwl_host_cmd cmd = {
5715                 .id = REPLY_SCAN_CMD,
5716                 .len = sizeof(struct iwl4965_scan_cmd),
5717                 .meta.flags = CMD_SIZE_HUGE,
5718         };
5719         struct iwl4965_scan_cmd *scan;
5720         struct ieee80211_conf *conf = NULL;
5721         u16 cmd_len;
5722         enum ieee80211_band band;
5723         u8 direct_mask;
5724         int ret = 0;
5725
5726         conf = ieee80211_get_hw_conf(priv->hw);
5727
5728         mutex_lock(&priv->mutex);
5729
5730         if (!iwl_is_ready(priv)) {
5731                 IWL_WARNING("request scan called when driver not ready.\n");
5732                 goto done;
5733         }
5734
5735         /* Make sure the scan wasn't cancelled before this queued work
5736          * was given the chance to run... */
5737         if (!test_bit(STATUS_SCANNING, &priv->status))
5738                 goto done;
5739
5740         /* This should never be called or scheduled if there is currently
5741          * a scan active in the hardware. */
5742         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5743                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5744                                "Ignoring second request.\n");
5745                 ret = -EIO;
5746                 goto done;
5747         }
5748
5749         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5750                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5751                 goto done;
5752         }
5753
5754         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5755                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5756                 goto done;
5757         }
5758
5759         if (iwl_is_rfkill(priv)) {
5760                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5761                 goto done;
5762         }
5763
5764         if (!test_bit(STATUS_READY, &priv->status)) {
5765                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5766                 goto done;
5767         }
5768
5769         if (!priv->scan_bands) {
5770                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5771                 goto done;
5772         }
5773
5774         if (!priv->scan) {
5775                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5776                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5777                 if (!priv->scan) {
5778                         ret = -ENOMEM;
5779                         goto done;
5780                 }
5781         }
5782         scan = priv->scan;
5783         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5784
5785         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5786         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5787
5788         if (iwl_is_associated(priv)) {
5789                 u16 interval = 0;
5790                 u32 extra;
5791                 u32 suspend_time = 100;
5792                 u32 scan_suspend_time = 100;
5793                 unsigned long flags;
5794
5795                 IWL_DEBUG_INFO("Scanning while associated...\n");
5796
5797                 spin_lock_irqsave(&priv->lock, flags);
5798                 interval = priv->beacon_int;
5799                 spin_unlock_irqrestore(&priv->lock, flags);
5800
5801                 scan->suspend_time = 0;
5802                 scan->max_out_time = cpu_to_le32(200 * 1024);
5803                 if (!interval)
5804                         interval = suspend_time;
5805
5806                 extra = (suspend_time / interval) << 22;
5807                 scan_suspend_time = (extra |
5808                     ((suspend_time % interval) * 1024));
5809                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5810                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5811                                scan_suspend_time, interval);
5812         }
5813
5814         /* We should add the ability for user to lock to PASSIVE ONLY */
5815         if (priv->one_direct_scan) {
5816                 IWL_DEBUG_SCAN
5817                     ("Kicking off one direct scan for '%s'\n",
5818                      iwl4965_escape_essid(priv->direct_ssid,
5819                                       priv->direct_ssid_len));
5820                 scan->direct_scan[0].id = WLAN_EID_SSID;
5821                 scan->direct_scan[0].len = priv->direct_ssid_len;
5822                 memcpy(scan->direct_scan[0].ssid,
5823                        priv->direct_ssid, priv->direct_ssid_len);
5824                 direct_mask = 1;
5825         } else if (!iwl_is_associated(priv) && priv->essid_len) {
5826                 scan->direct_scan[0].id = WLAN_EID_SSID;
5827                 scan->direct_scan[0].len = priv->essid_len;
5828                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5829                 direct_mask = 1;
5830         } else {
5831                 direct_mask = 0;
5832         }
5833
5834         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5835         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5836         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5837
5838
5839         switch (priv->scan_bands) {
5840         case 2:
5841                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5842                 scan->tx_cmd.rate_n_flags =
5843                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5844                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5845
5846                 scan->good_CRC_th = 0;
5847                 band = IEEE80211_BAND_2GHZ;
5848                 break;
5849
5850         case 1:
5851                 scan->tx_cmd.rate_n_flags =
5852                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5853                                 RATE_MCS_ANT_B_MSK);
5854                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5855                 band = IEEE80211_BAND_5GHZ;
5856                 break;
5857
5858         default:
5859                 IWL_WARNING("Invalid scan band count\n");
5860                 goto done;
5861         }
5862
5863         /* We don't build a direct scan probe request; the uCode will do
5864          * that based on the direct_mask added to each channel entry */
5865         cmd_len = iwl4965_fill_probe_req(priv, band,
5866                                         (struct ieee80211_mgmt *)scan->data,
5867                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5868
5869         scan->tx_cmd.len = cpu_to_le16(cmd_len);
5870         /* select Rx chains */
5871
5872         /* Force use of chains B and C (0x6) for scan Rx.
5873          * Avoid A (0x1) because of its off-channel reception on A-band.
5874          * MIMO is not used here, but value is required to make uCode happy. */
5875         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5876                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5877                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5878                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5879
5880         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5881                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5882
5883         if (direct_mask) {
5884                 IWL_DEBUG_SCAN
5885                     ("Initiating direct scan for %s.\n",
5886                      iwl4965_escape_essid(priv->essid, priv->essid_len));
5887                 scan->channel_count =
5888                         iwl4965_get_channels_for_scan(
5889                                 priv, band, 1, /* active */
5890                                 direct_mask,
5891                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5892         } else {
5893                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
5894                 scan->channel_count =
5895                         iwl4965_get_channels_for_scan(
5896                                 priv, band, 0, /* passive */
5897                                 direct_mask,
5898                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5899         }
5900
5901         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5902             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5903         cmd.data = scan;
5904         scan->len = cpu_to_le16(cmd.len);
5905
5906         set_bit(STATUS_SCAN_HW, &priv->status);
5907         ret = iwl_send_cmd_sync(priv, &cmd);
5908         if (ret)
5909                 goto done;
5910
5911         queue_delayed_work(priv->workqueue, &priv->scan_check,
5912                            IWL_SCAN_CHECK_WATCHDOG);
5913
5914         mutex_unlock(&priv->mutex);
5915         return;
5916
5917  done:
5918         /* inform mac80211 scan aborted */
5919         queue_work(priv->workqueue, &priv->scan_completed);
5920         mutex_unlock(&priv->mutex);
5921 }
5922
5923 static void iwl4965_bg_up(struct work_struct *data)
5924 {
5925         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5926
5927         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5928                 return;
5929
5930         mutex_lock(&priv->mutex);
5931         __iwl4965_up(priv);
5932         mutex_unlock(&priv->mutex);
5933 }
5934
5935 static void iwl4965_bg_restart(struct work_struct *data)
5936 {
5937         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5938
5939         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5940                 return;
5941
5942         iwl4965_down(priv);
5943         queue_work(priv->workqueue, &priv->up);
5944 }
5945
5946 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5947 {
5948         struct iwl_priv *priv =
5949             container_of(data, struct iwl_priv, rx_replenish);
5950
5951         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5952                 return;
5953
5954         mutex_lock(&priv->mutex);
5955         iwl4965_rx_replenish(priv);
5956         mutex_unlock(&priv->mutex);
5957 }
5958
5959 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5960
5961 static void iwl4965_post_associate(struct iwl_priv *priv)
5962 {
5963         struct ieee80211_conf *conf = NULL;
5964         int ret = 0;
5965         DECLARE_MAC_BUF(mac);
5966
5967         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5968                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5969                 return;
5970         }
5971
5972         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5973                         priv->assoc_id,
5974                         print_mac(mac, priv->active_rxon.bssid_addr));
5975
5976
5977         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5978                 return;
5979
5980
5981         if (!priv->vif || !priv->is_open)
5982                 return;
5983
5984         iwl4965_scan_cancel_timeout(priv, 200);
5985
5986         conf = ieee80211_get_hw_conf(priv->hw);
5987
5988         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5989         iwl4965_commit_rxon(priv);
5990
5991         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5992         iwl4965_setup_rxon_timing(priv);
5993         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5994                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5995         if (ret)
5996                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5997                             "Attempting to continue.\n");
5998
5999         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6000
6001 #ifdef CONFIG_IWL4965_HT
6002         if (priv->current_ht_config.is_ht)
6003                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
6004 #endif /* CONFIG_IWL4965_HT*/
6005         iwl4965_set_rxon_chain(priv);
6006         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6007
6008         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6009                         priv->assoc_id, priv->beacon_int);
6010
6011         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6012                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6013         else
6014                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6015
6016         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6017                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6018                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6019                 else
6020                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6021
6022                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6023                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6024
6025         }
6026
6027         iwl4965_commit_rxon(priv);
6028
6029         switch (priv->iw_mode) {
6030         case IEEE80211_IF_TYPE_STA:
6031                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6032                 break;
6033
6034         case IEEE80211_IF_TYPE_IBSS:
6035
6036                 /* clear out the station table */
6037                 iwlcore_clear_stations_table(priv);
6038
6039                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6040                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6041                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6042                 iwl4965_send_beacon_cmd(priv);
6043
6044                 break;
6045
6046         default:
6047                 IWL_ERROR("%s Should not be called in %d mode\n",
6048                                 __FUNCTION__, priv->iw_mode);
6049                 break;
6050         }
6051
6052         iwl4965_sequence_reset(priv);
6053
6054 #ifdef CONFIG_IWL4965_SENSITIVITY
6055         /* Enable Rx differential gain and sensitivity calibrations */
6056         iwl4965_chain_noise_reset(priv);
6057         priv->start_calib = 1;
6058 #endif /* CONFIG_IWL4965_SENSITIVITY */
6059
6060         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6061                 priv->assoc_station_added = 1;
6062
6063         iwl4965_activate_qos(priv, 0);
6064
6065         /* we have just associated, don't start scan too early */
6066         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6067 }
6068
6069
6070 static void iwl4965_bg_post_associate(struct work_struct *data)
6071 {
6072         struct iwl_priv *priv = container_of(data, struct iwl_priv,
6073                                              post_associate.work);
6074
6075         mutex_lock(&priv->mutex);
6076         iwl4965_post_associate(priv);
6077         mutex_unlock(&priv->mutex);
6078
6079 }
6080
6081 static void iwl4965_bg_abort_scan(struct work_struct *work)
6082 {
6083         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6084
6085         if (!iwl_is_ready(priv))
6086                 return;
6087
6088         mutex_lock(&priv->mutex);
6089
6090         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6091         iwl4965_send_scan_abort(priv);
6092
6093         mutex_unlock(&priv->mutex);
6094 }
6095
6096 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6097
6098 static void iwl4965_bg_scan_completed(struct work_struct *work)
6099 {
6100         struct iwl_priv *priv =
6101             container_of(work, struct iwl_priv, scan_completed);
6102
6103         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6104
6105         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6106                 return;
6107
6108         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6109                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6110
6111         ieee80211_scan_completed(priv->hw);
6112
6113         /* Since setting the TXPOWER may have been deferred while
6114          * performing the scan, fire one off */
6115         mutex_lock(&priv->mutex);
6116         iwl4965_hw_reg_send_txpower(priv);
6117         mutex_unlock(&priv->mutex);
6118 }
6119
6120 /*****************************************************************************
6121  *
6122  * mac80211 entry point functions
6123  *
6124  *****************************************************************************/
6125
6126 #define UCODE_READY_TIMEOUT     (2 * HZ)
6127
6128 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6129 {
6130         struct iwl_priv *priv = hw->priv;
6131         int ret;
6132
6133         IWL_DEBUG_MAC80211("enter\n");
6134
6135         if (pci_enable_device(priv->pci_dev)) {
6136                 IWL_ERROR("Fail to pci_enable_device\n");
6137                 return -ENODEV;
6138         }
6139         pci_restore_state(priv->pci_dev);
6140         pci_enable_msi(priv->pci_dev);
6141
6142         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
6143                           DRV_NAME, priv);
6144         if (ret) {
6145                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6146                 goto out_disable_msi;
6147         }
6148
6149         /* we should be verifying the device is ready to be opened */
6150         mutex_lock(&priv->mutex);
6151
6152         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
6153         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6154          * ucode filename and max sizes are card-specific. */
6155
6156         if (!priv->ucode_code.len) {
6157                 ret = iwl4965_read_ucode(priv);
6158                 if (ret) {
6159                         IWL_ERROR("Could not read microcode: %d\n", ret);
6160                         mutex_unlock(&priv->mutex);
6161                         goto out_release_irq;
6162                 }
6163         }
6164
6165         ret = __iwl4965_up(priv);
6166
6167         mutex_unlock(&priv->mutex);
6168
6169         if (ret)
6170                 goto out_release_irq;
6171
6172         IWL_DEBUG_INFO("Start UP work done.\n");
6173
6174         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6175                 return 0;
6176
6177         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6178          * mac80211 will not be run successfully. */
6179         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6180                         test_bit(STATUS_READY, &priv->status),
6181                         UCODE_READY_TIMEOUT);
6182         if (!ret) {
6183                 if (!test_bit(STATUS_READY, &priv->status)) {
6184                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6185                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6186                         ret = -ETIMEDOUT;
6187                         goto out_release_irq;
6188                 }
6189         }
6190
6191         priv->is_open = 1;
6192         IWL_DEBUG_MAC80211("leave\n");
6193         return 0;
6194
6195 out_release_irq:
6196         free_irq(priv->pci_dev->irq, priv);
6197 out_disable_msi:
6198         pci_disable_msi(priv->pci_dev);
6199         pci_disable_device(priv->pci_dev);
6200         priv->is_open = 0;
6201         IWL_DEBUG_MAC80211("leave - failed\n");
6202         return ret;
6203 }
6204
6205 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6206 {
6207         struct iwl_priv *priv = hw->priv;
6208
6209         IWL_DEBUG_MAC80211("enter\n");
6210
6211         if (!priv->is_open) {
6212                 IWL_DEBUG_MAC80211("leave - skip\n");
6213                 return;
6214         }
6215
6216         priv->is_open = 0;
6217
6218         if (iwl_is_ready_rf(priv)) {
6219                 /* stop mac, cancel any scan request and clear
6220                  * RXON_FILTER_ASSOC_MSK BIT
6221                  */
6222                 mutex_lock(&priv->mutex);
6223                 iwl4965_scan_cancel_timeout(priv, 100);
6224                 cancel_delayed_work(&priv->post_associate);
6225                 mutex_unlock(&priv->mutex);
6226         }
6227
6228         iwl4965_down(priv);
6229
6230         flush_workqueue(priv->workqueue);
6231         free_irq(priv->pci_dev->irq, priv);
6232         pci_disable_msi(priv->pci_dev);
6233         pci_save_state(priv->pci_dev);
6234         pci_disable_device(priv->pci_dev);
6235
6236         IWL_DEBUG_MAC80211("leave\n");
6237 }
6238
6239 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6240                       struct ieee80211_tx_control *ctl)
6241 {
6242         struct iwl_priv *priv = hw->priv;
6243
6244         IWL_DEBUG_MAC80211("enter\n");
6245
6246         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6247                 IWL_DEBUG_MAC80211("leave - monitor\n");
6248                 return -1;
6249         }
6250
6251         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6252                      ctl->tx_rate->bitrate);
6253
6254         if (iwl4965_tx_skb(priv, skb, ctl))
6255                 dev_kfree_skb_any(skb);
6256
6257         IWL_DEBUG_MAC80211("leave\n");
6258         return 0;
6259 }
6260
6261 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6262                                  struct ieee80211_if_init_conf *conf)
6263 {
6264         struct iwl_priv *priv = hw->priv;
6265         unsigned long flags;
6266         DECLARE_MAC_BUF(mac);
6267
6268         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6269
6270         if (priv->vif) {
6271                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6272                 return -EOPNOTSUPP;
6273         }
6274
6275         spin_lock_irqsave(&priv->lock, flags);
6276         priv->vif = conf->vif;
6277
6278         spin_unlock_irqrestore(&priv->lock, flags);
6279
6280         mutex_lock(&priv->mutex);
6281
6282         if (conf->mac_addr) {
6283                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6284                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6285         }
6286
6287         if (iwl_is_ready(priv))
6288                 iwl4965_set_mode(priv, conf->type);
6289
6290         mutex_unlock(&priv->mutex);
6291
6292         IWL_DEBUG_MAC80211("leave\n");
6293         return 0;
6294 }
6295
6296 /**
6297  * iwl4965_mac_config - mac80211 config callback
6298  *
6299  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6300  * be set inappropriately and the driver currently sets the hardware up to
6301  * use it whenever needed.
6302  */
6303 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6304 {
6305         struct iwl_priv *priv = hw->priv;
6306         const struct iwl_channel_info *ch_info;
6307         unsigned long flags;
6308         int ret = 0;
6309
6310         mutex_lock(&priv->mutex);
6311         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6312
6313         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6314
6315         if (!iwl_is_ready(priv)) {
6316                 IWL_DEBUG_MAC80211("leave - not ready\n");
6317                 ret = -EIO;
6318                 goto out;
6319         }
6320
6321         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6322                      test_bit(STATUS_SCANNING, &priv->status))) {
6323                 IWL_DEBUG_MAC80211("leave - scanning\n");
6324                 set_bit(STATUS_CONF_PENDING, &priv->status);
6325                 mutex_unlock(&priv->mutex);
6326                 return 0;
6327         }
6328
6329         spin_lock_irqsave(&priv->lock, flags);
6330
6331         ch_info = iwl_get_channel_info(priv, conf->channel->band,
6332                         ieee80211_frequency_to_channel(conf->channel->center_freq));
6333         if (!is_channel_valid(ch_info)) {
6334                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6335                 spin_unlock_irqrestore(&priv->lock, flags);
6336                 ret = -EINVAL;
6337                 goto out;
6338         }
6339
6340 #ifdef CONFIG_IWL4965_HT
6341         /* if we are switching from ht to 2.4 clear flags
6342          * from any ht related info since 2.4 does not
6343          * support ht */
6344         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6345 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6346             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6347 #endif
6348         )
6349                 priv->staging_rxon.flags = 0;
6350 #endif /* CONFIG_IWL4965_HT */
6351
6352         iwlcore_set_rxon_channel(priv, conf->channel->band,
6353                 ieee80211_frequency_to_channel(conf->channel->center_freq));
6354
6355         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6356
6357         /* The list of supported rates and rate mask can be different
6358          * for each band; since the band may have changed, reset
6359          * the rate mask to what mac80211 lists */
6360         iwl4965_set_rate(priv);
6361
6362         spin_unlock_irqrestore(&priv->lock, flags);
6363
6364 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6365         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6366                 iwl4965_hw_channel_switch(priv, conf->channel);
6367                 goto out;
6368         }
6369 #endif
6370
6371         if (priv->cfg->ops->lib->radio_kill_sw)
6372                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6373
6374         if (!conf->radio_enabled) {
6375                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6376                 goto out;
6377         }
6378
6379         if (iwl_is_rfkill(priv)) {
6380                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6381                 ret = -EIO;
6382                 goto out;
6383         }
6384
6385         iwl4965_set_rate(priv);
6386
6387         if (memcmp(&priv->active_rxon,
6388                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6389                 iwl4965_commit_rxon(priv);
6390         else
6391                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6392
6393         IWL_DEBUG_MAC80211("leave\n");
6394
6395 out:
6396         clear_bit(STATUS_CONF_PENDING, &priv->status);
6397         mutex_unlock(&priv->mutex);
6398         return ret;
6399 }
6400
6401 static void iwl4965_config_ap(struct iwl_priv *priv)
6402 {
6403         int ret = 0;
6404
6405         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6406                 return;
6407
6408         /* The following should be done only at AP bring up */
6409         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6410
6411                 /* RXON - unassoc (to set timing command) */
6412                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6413                 iwl4965_commit_rxon(priv);
6414
6415                 /* RXON Timing */
6416                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6417                 iwl4965_setup_rxon_timing(priv);
6418                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6419                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6420                 if (ret)
6421                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6422                                         "Attempting to continue.\n");
6423
6424                 iwl4965_set_rxon_chain(priv);
6425
6426                 /* FIXME: what should be the assoc_id for AP? */
6427                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6428                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6429                         priv->staging_rxon.flags |=
6430                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6431                 else
6432                         priv->staging_rxon.flags &=
6433                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6434
6435                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6436                         if (priv->assoc_capability &
6437                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6438                                 priv->staging_rxon.flags |=
6439                                         RXON_FLG_SHORT_SLOT_MSK;
6440                         else
6441                                 priv->staging_rxon.flags &=
6442                                         ~RXON_FLG_SHORT_SLOT_MSK;
6443
6444                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6445                                 priv->staging_rxon.flags &=
6446                                         ~RXON_FLG_SHORT_SLOT_MSK;
6447                 }
6448                 /* restore RXON assoc */
6449                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6450                 iwl4965_commit_rxon(priv);
6451                 iwl4965_activate_qos(priv, 1);
6452                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6453         }
6454         iwl4965_send_beacon_cmd(priv);
6455
6456         /* FIXME - we need to add code here to detect a totally new
6457          * configuration, reset the AP, unassoc, rxon timing, assoc,
6458          * clear sta table, add BCAST sta... */
6459 }
6460
6461 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6462                                         struct ieee80211_vif *vif,
6463                                     struct ieee80211_if_conf *conf)
6464 {
6465         struct iwl_priv *priv = hw->priv;
6466         DECLARE_MAC_BUF(mac);
6467         unsigned long flags;
6468         int rc;
6469
6470         if (conf == NULL)
6471                 return -EIO;
6472
6473         if (priv->vif != vif) {
6474                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6475                 mutex_unlock(&priv->mutex);
6476                 return 0;
6477         }
6478
6479         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6480             (!conf->beacon || !conf->ssid_len)) {
6481                 IWL_DEBUG_MAC80211
6482                     ("Leaving in AP mode because HostAPD is not ready.\n");
6483                 return 0;
6484         }
6485
6486         if (!iwl_is_alive(priv))
6487                 return -EAGAIN;
6488
6489         mutex_lock(&priv->mutex);
6490
6491         if (conf->bssid)
6492                 IWL_DEBUG_MAC80211("bssid: %s\n",
6493                                    print_mac(mac, conf->bssid));
6494
6495 /*
6496  * very dubious code was here; the probe filtering flag is never set:
6497  *
6498         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6499             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6500  */
6501
6502         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6503                 if (!conf->bssid) {
6504                         conf->bssid = priv->mac_addr;
6505                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6506                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6507                                            print_mac(mac, conf->bssid));
6508                 }
6509                 if (priv->ibss_beacon)
6510                         dev_kfree_skb(priv->ibss_beacon);
6511
6512                 priv->ibss_beacon = conf->beacon;
6513         }
6514
6515         if (iwl_is_rfkill(priv))
6516                 goto done;
6517
6518         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6519             !is_multicast_ether_addr(conf->bssid)) {
6520                 /* If there is currently a HW scan going on in the background
6521                  * then we need to cancel it else the RXON below will fail. */
6522                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6523                         IWL_WARNING("Aborted scan still in progress "
6524                                     "after 100ms\n");
6525                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6526                         mutex_unlock(&priv->mutex);
6527                         return -EAGAIN;
6528                 }
6529                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6530
6531                 /* TODO: Audit driver for usage of these members and see
6532                  * if mac80211 deprecates them (priv->bssid looks like it
6533                  * shouldn't be there, but I haven't scanned the IBSS code
6534                  * to verify) - jpk */
6535                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6536
6537                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6538                         iwl4965_config_ap(priv);
6539                 else {
6540                         rc = iwl4965_commit_rxon(priv);
6541                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6542                                 iwl4965_rxon_add_station(
6543                                         priv, priv->active_rxon.bssid_addr, 1);
6544                 }
6545
6546         } else {
6547                 iwl4965_scan_cancel_timeout(priv, 100);
6548                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6549                 iwl4965_commit_rxon(priv);
6550         }
6551
6552  done:
6553         spin_lock_irqsave(&priv->lock, flags);
6554         if (!conf->ssid_len)
6555                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6556         else
6557                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6558
6559         priv->essid_len = conf->ssid_len;
6560         spin_unlock_irqrestore(&priv->lock, flags);
6561
6562         IWL_DEBUG_MAC80211("leave\n");
6563         mutex_unlock(&priv->mutex);
6564
6565         return 0;
6566 }
6567
6568 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6569                                  unsigned int changed_flags,
6570                                  unsigned int *total_flags,
6571                                  int mc_count, struct dev_addr_list *mc_list)
6572 {
6573         /*
6574          * XXX: dummy
6575          * see also iwl4965_connection_init_rx_config
6576          */
6577         *total_flags = 0;
6578 }
6579
6580 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6581                                      struct ieee80211_if_init_conf *conf)
6582 {
6583         struct iwl_priv *priv = hw->priv;
6584
6585         IWL_DEBUG_MAC80211("enter\n");
6586
6587         mutex_lock(&priv->mutex);
6588
6589         if (iwl_is_ready_rf(priv)) {
6590                 iwl4965_scan_cancel_timeout(priv, 100);
6591                 cancel_delayed_work(&priv->post_associate);
6592                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6593                 iwl4965_commit_rxon(priv);
6594         }
6595         if (priv->vif == conf->vif) {
6596                 priv->vif = NULL;
6597                 memset(priv->bssid, 0, ETH_ALEN);
6598                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6599                 priv->essid_len = 0;
6600         }
6601         mutex_unlock(&priv->mutex);
6602
6603         IWL_DEBUG_MAC80211("leave\n");
6604
6605 }
6606
6607
6608 #ifdef CONFIG_IWL4965_HT
6609 static void iwl4965_ht_conf(struct iwl_priv *priv,
6610                             struct ieee80211_bss_conf *bss_conf)
6611 {
6612         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
6613         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
6614         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
6615
6616         IWL_DEBUG_MAC80211("enter: \n");
6617
6618         iwl_conf->is_ht = bss_conf->assoc_ht;
6619
6620         if (!iwl_conf->is_ht)
6621                 return;
6622
6623         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6624
6625         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
6626                 iwl_conf->sgf |= 0x1;
6627         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
6628                 iwl_conf->sgf |= 0x2;
6629
6630         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
6631         iwl_conf->max_amsdu_size =
6632                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
6633
6634         iwl_conf->supported_chan_width =
6635                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
6636         iwl_conf->extension_chan_offset =
6637                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
6638         /* If no above or below channel supplied disable FAT channel */
6639         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
6640             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
6641                 iwl_conf->supported_chan_width = 0;
6642
6643         iwl_conf->tx_mimo_ps_mode =
6644                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6645         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
6646
6647         iwl_conf->control_channel = ht_bss_conf->primary_channel;
6648         iwl_conf->tx_chan_width =
6649                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
6650         iwl_conf->ht_protection =
6651                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
6652         iwl_conf->non_GF_STA_present =
6653                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
6654
6655         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
6656         IWL_DEBUG_MAC80211("leave\n");
6657 }
6658 #else
6659 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
6660                                    struct ieee80211_bss_conf *bss_conf)
6661 {
6662 }
6663 #endif
6664
6665 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6666 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6667                                      struct ieee80211_vif *vif,
6668                                      struct ieee80211_bss_conf *bss_conf,
6669                                      u32 changes)
6670 {
6671         struct iwl_priv *priv = hw->priv;
6672
6673         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6674
6675         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6676                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6677                                    bss_conf->use_short_preamble);
6678                 if (bss_conf->use_short_preamble)
6679                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6680                 else
6681                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6682         }
6683
6684         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6685                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6686                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6687                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6688                 else
6689                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6690         }
6691
6692         if (changes & BSS_CHANGED_HT) {
6693                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6694                 iwl4965_ht_conf(priv, bss_conf);
6695                 iwl4965_set_rxon_chain(priv);
6696         }
6697
6698         if (changes & BSS_CHANGED_ASSOC) {
6699                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6700                 /* This should never happen as this function should
6701                  * never be called from interrupt context. */
6702                 if (WARN_ON_ONCE(in_interrupt()))
6703                         return;
6704                 if (bss_conf->assoc) {
6705                         priv->assoc_id = bss_conf->aid;
6706                         priv->beacon_int = bss_conf->beacon_int;
6707                         priv->timestamp = bss_conf->timestamp;
6708                         priv->assoc_capability = bss_conf->assoc_capability;
6709                         priv->next_scan_jiffies = jiffies +
6710                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6711                         mutex_lock(&priv->mutex);
6712                         iwl4965_post_associate(priv);
6713                         mutex_unlock(&priv->mutex);
6714                 } else {
6715                         priv->assoc_id = 0;
6716                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6717                 }
6718         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6719                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6720                         iwl_send_rxon_assoc(priv);
6721         }
6722
6723 }
6724
6725 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6726 {
6727         int rc = 0;
6728         unsigned long flags;
6729         struct iwl_priv *priv = hw->priv;
6730
6731         IWL_DEBUG_MAC80211("enter\n");
6732
6733         mutex_lock(&priv->mutex);
6734         spin_lock_irqsave(&priv->lock, flags);
6735
6736         if (!iwl_is_ready_rf(priv)) {
6737                 rc = -EIO;
6738                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6739                 goto out_unlock;
6740         }
6741
6742         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6743                 rc = -EIO;
6744                 IWL_ERROR("ERROR: APs don't scan\n");
6745                 goto out_unlock;
6746         }
6747
6748         /* we don't schedule scan within next_scan_jiffies period */
6749         if (priv->next_scan_jiffies &&
6750                         time_after(priv->next_scan_jiffies, jiffies)) {
6751                 rc = -EAGAIN;
6752                 goto out_unlock;
6753         }
6754         /* if we just finished scan ask for delay */
6755         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6756                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
6757                 rc = -EAGAIN;
6758                 goto out_unlock;
6759         }
6760         if (len) {
6761                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6762                                iwl4965_escape_essid(ssid, len), (int)len);
6763
6764                 priv->one_direct_scan = 1;
6765                 priv->direct_ssid_len = (u8)
6766                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6767                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6768         } else
6769                 priv->one_direct_scan = 0;
6770
6771         rc = iwl4965_scan_initiate(priv);
6772
6773         IWL_DEBUG_MAC80211("leave\n");
6774
6775 out_unlock:
6776         spin_unlock_irqrestore(&priv->lock, flags);
6777         mutex_unlock(&priv->mutex);
6778
6779         return rc;
6780 }
6781
6782 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6783                         struct ieee80211_key_conf *keyconf, const u8 *addr,
6784                         u32 iv32, u16 *phase1key)
6785 {
6786         struct iwl_priv *priv = hw->priv;
6787         u8 sta_id = IWL_INVALID_STATION;
6788         unsigned long flags;
6789         __le16 key_flags = 0;
6790         int i;
6791         DECLARE_MAC_BUF(mac);
6792
6793         IWL_DEBUG_MAC80211("enter\n");
6794
6795         sta_id = iwl4965_hw_find_station(priv, addr);
6796         if (sta_id == IWL_INVALID_STATION) {
6797                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6798                                    print_mac(mac, addr));
6799                 return;
6800         }
6801
6802         iwl4965_scan_cancel_timeout(priv, 100);
6803
6804         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6805         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6806         key_flags &= ~STA_KEY_FLG_INVALID;
6807
6808         if (sta_id == priv->hw_params.bcast_sta_id)
6809                 key_flags |= STA_KEY_MULTICAST_MSK;
6810
6811         spin_lock_irqsave(&priv->sta_lock, flags);
6812
6813         priv->stations[sta_id].sta.key.key_flags = key_flags;
6814         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6815
6816         for (i = 0; i < 5; i++)
6817                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6818                         cpu_to_le16(phase1key[i]);
6819
6820         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6821         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6822
6823         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6824
6825         spin_unlock_irqrestore(&priv->sta_lock, flags);
6826
6827         IWL_DEBUG_MAC80211("leave\n");
6828 }
6829
6830 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6831                            const u8 *local_addr, const u8 *addr,
6832                            struct ieee80211_key_conf *key)
6833 {
6834         struct iwl_priv *priv = hw->priv;
6835         DECLARE_MAC_BUF(mac);
6836         int ret = 0;
6837         u8 sta_id = IWL_INVALID_STATION;
6838         u8 is_default_wep_key = 0;
6839
6840         IWL_DEBUG_MAC80211("enter\n");
6841
6842         if (!priv->cfg->mod_params->hw_crypto) {
6843                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6844                 return -EOPNOTSUPP;
6845         }
6846
6847         if (is_zero_ether_addr(addr))
6848                 /* only support pairwise keys */
6849                 return -EOPNOTSUPP;
6850
6851         sta_id = iwl4965_hw_find_station(priv, addr);
6852         if (sta_id == IWL_INVALID_STATION) {
6853                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6854                                    print_mac(mac, addr));
6855                 return -EINVAL;
6856
6857         }
6858
6859         mutex_lock(&priv->mutex);
6860         iwl4965_scan_cancel_timeout(priv, 100);
6861         mutex_unlock(&priv->mutex);
6862
6863         /* If we are getting WEP group key and we didn't receive any key mapping
6864          * so far, we are in legacy wep mode (group key only), otherwise we are
6865          * in 1X mode.
6866          * In legacy wep mode, we use another host command to the uCode */
6867         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6868                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6869                 if (cmd == SET_KEY)
6870                         is_default_wep_key = !priv->key_mapping_key;
6871                 else
6872                         is_default_wep_key = priv->default_wep_key;
6873         }
6874
6875         switch (cmd) {
6876         case SET_KEY:
6877                 if (is_default_wep_key)
6878                         ret = iwl_set_default_wep_key(priv, key);
6879                 else
6880                         ret = iwl_set_dynamic_key(priv, key, sta_id);
6881
6882                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6883                 break;
6884         case DISABLE_KEY:
6885                 if (is_default_wep_key)
6886                         ret = iwl_remove_default_wep_key(priv, key);
6887                 else
6888                         ret = iwl_remove_dynamic_key(priv, sta_id);
6889
6890                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6891                 break;
6892         default:
6893                 ret = -EINVAL;
6894         }
6895
6896         IWL_DEBUG_MAC80211("leave\n");
6897
6898         return ret;
6899 }
6900
6901 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6902                            const struct ieee80211_tx_queue_params *params)
6903 {
6904         struct iwl_priv *priv = hw->priv;
6905         unsigned long flags;
6906         int q;
6907
6908         IWL_DEBUG_MAC80211("enter\n");
6909
6910         if (!iwl_is_ready_rf(priv)) {
6911                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6912                 return -EIO;
6913         }
6914
6915         if (queue >= AC_NUM) {
6916                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6917                 return 0;
6918         }
6919
6920         if (!priv->qos_data.qos_enable) {
6921                 priv->qos_data.qos_active = 0;
6922                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6923                 return 0;
6924         }
6925         q = AC_NUM - 1 - queue;
6926
6927         spin_lock_irqsave(&priv->lock, flags);
6928
6929         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6930         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6931         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6932         priv->qos_data.def_qos_parm.ac[q].edca_txop =
6933                         cpu_to_le16((params->txop * 32));
6934
6935         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6936         priv->qos_data.qos_active = 1;
6937
6938         spin_unlock_irqrestore(&priv->lock, flags);
6939
6940         mutex_lock(&priv->mutex);
6941         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6942                 iwl4965_activate_qos(priv, 1);
6943         else if (priv->assoc_id && iwl_is_associated(priv))
6944                 iwl4965_activate_qos(priv, 0);
6945
6946         mutex_unlock(&priv->mutex);
6947
6948         IWL_DEBUG_MAC80211("leave\n");
6949         return 0;
6950 }
6951
6952 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6953                                 struct ieee80211_tx_queue_stats *stats)
6954 {
6955         struct iwl_priv *priv = hw->priv;
6956         int i, avail;
6957         struct iwl4965_tx_queue *txq;
6958         struct iwl4965_queue *q;
6959         unsigned long flags;
6960
6961         IWL_DEBUG_MAC80211("enter\n");
6962
6963         if (!iwl_is_ready_rf(priv)) {
6964                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6965                 return -EIO;
6966         }
6967
6968         spin_lock_irqsave(&priv->lock, flags);
6969
6970         for (i = 0; i < AC_NUM; i++) {
6971                 txq = &priv->txq[i];
6972                 q = &txq->q;
6973                 avail = iwl4965_queue_space(q);
6974
6975                 stats->data[i].len = q->n_window - avail;
6976                 stats->data[i].limit = q->n_window - q->high_mark;
6977                 stats->data[i].count = q->n_window;
6978
6979         }
6980         spin_unlock_irqrestore(&priv->lock, flags);
6981
6982         IWL_DEBUG_MAC80211("leave\n");
6983
6984         return 0;
6985 }
6986
6987 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6988                              struct ieee80211_low_level_stats *stats)
6989 {
6990         IWL_DEBUG_MAC80211("enter\n");
6991         IWL_DEBUG_MAC80211("leave\n");
6992
6993         return 0;
6994 }
6995
6996 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6997 {
6998         IWL_DEBUG_MAC80211("enter\n");
6999         IWL_DEBUG_MAC80211("leave\n");
7000
7001         return 0;
7002 }
7003
7004 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7005 {
7006         struct iwl_priv *priv = hw->priv;
7007         unsigned long flags;
7008
7009         mutex_lock(&priv->mutex);
7010         IWL_DEBUG_MAC80211("enter\n");
7011
7012         priv->lq_mngr.lq_ready = 0;
7013 #ifdef CONFIG_IWL4965_HT
7014         spin_lock_irqsave(&priv->lock, flags);
7015         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7016         spin_unlock_irqrestore(&priv->lock, flags);
7017 #endif /* CONFIG_IWL4965_HT */
7018
7019         iwlcore_reset_qos(priv);
7020
7021         cancel_delayed_work(&priv->post_associate);
7022
7023         spin_lock_irqsave(&priv->lock, flags);
7024         priv->assoc_id = 0;
7025         priv->assoc_capability = 0;
7026         priv->assoc_station_added = 0;
7027
7028         /* new association get rid of ibss beacon skb */
7029         if (priv->ibss_beacon)
7030                 dev_kfree_skb(priv->ibss_beacon);
7031
7032         priv->ibss_beacon = NULL;
7033
7034         priv->beacon_int = priv->hw->conf.beacon_int;
7035         priv->timestamp = 0;
7036         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7037                 priv->beacon_int = 0;
7038
7039         spin_unlock_irqrestore(&priv->lock, flags);
7040
7041         if (!iwl_is_ready_rf(priv)) {
7042                 IWL_DEBUG_MAC80211("leave - not ready\n");
7043                 mutex_unlock(&priv->mutex);
7044                 return;
7045         }
7046
7047         /* we are restarting association process
7048          * clear RXON_FILTER_ASSOC_MSK bit
7049          */
7050         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7051                 iwl4965_scan_cancel_timeout(priv, 100);
7052                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7053                 iwl4965_commit_rxon(priv);
7054         }
7055
7056         /* Per mac80211.h: This is only used in IBSS mode... */
7057         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7058
7059                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7060                 mutex_unlock(&priv->mutex);
7061                 return;
7062         }
7063
7064         priv->only_active_channel = 0;
7065
7066         iwl4965_set_rate(priv);
7067
7068         mutex_unlock(&priv->mutex);
7069
7070         IWL_DEBUG_MAC80211("leave\n");
7071 }
7072
7073 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7074                                  struct ieee80211_tx_control *control)
7075 {
7076         struct iwl_priv *priv = hw->priv;
7077         unsigned long flags;
7078
7079         mutex_lock(&priv->mutex);
7080         IWL_DEBUG_MAC80211("enter\n");
7081
7082         if (!iwl_is_ready_rf(priv)) {
7083                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7084                 mutex_unlock(&priv->mutex);
7085                 return -EIO;
7086         }
7087
7088         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7089                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7090                 mutex_unlock(&priv->mutex);
7091                 return -EIO;
7092         }
7093
7094         spin_lock_irqsave(&priv->lock, flags);
7095
7096         if (priv->ibss_beacon)
7097                 dev_kfree_skb(priv->ibss_beacon);
7098
7099         priv->ibss_beacon = skb;
7100
7101         priv->assoc_id = 0;
7102
7103         IWL_DEBUG_MAC80211("leave\n");
7104         spin_unlock_irqrestore(&priv->lock, flags);
7105
7106         iwlcore_reset_qos(priv);
7107
7108         queue_work(priv->workqueue, &priv->post_associate.work);
7109
7110         mutex_unlock(&priv->mutex);
7111
7112         return 0;
7113 }
7114
7115 /*****************************************************************************
7116  *
7117  * sysfs attributes
7118  *
7119  *****************************************************************************/
7120
7121 #ifdef CONFIG_IWLWIFI_DEBUG
7122
7123 /*
7124  * The following adds a new attribute to the sysfs representation
7125  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7126  * used for controlling the debug level.
7127  *
7128  * See the level definitions in iwl for details.
7129  */
7130
7131 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7132 {
7133         return sprintf(buf, "0x%08X\n", iwl_debug_level);
7134 }
7135 static ssize_t store_debug_level(struct device_driver *d,
7136                                  const char *buf, size_t count)
7137 {
7138         char *p = (char *)buf;
7139         u32 val;
7140
7141         val = simple_strtoul(p, &p, 0);
7142         if (p == buf)
7143                 printk(KERN_INFO DRV_NAME
7144                        ": %s is not in hex or decimal form.\n", buf);
7145         else
7146                 iwl_debug_level = val;
7147
7148         return strnlen(buf, count);
7149 }
7150
7151 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7152                    show_debug_level, store_debug_level);
7153
7154 #endif /* CONFIG_IWLWIFI_DEBUG */
7155
7156
7157 static ssize_t show_temperature(struct device *d,
7158                                 struct device_attribute *attr, char *buf)
7159 {
7160         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7161
7162         if (!iwl_is_alive(priv))
7163                 return -EAGAIN;
7164
7165         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7166 }
7167
7168 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7169
7170 static ssize_t show_rs_window(struct device *d,
7171                               struct device_attribute *attr,
7172                               char *buf)
7173 {
7174         struct iwl_priv *priv = d->driver_data;
7175         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7176 }
7177 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7178
7179 static ssize_t show_tx_power(struct device *d,
7180                              struct device_attribute *attr, char *buf)
7181 {
7182         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7183         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7184 }
7185
7186 static ssize_t store_tx_power(struct device *d,
7187                               struct device_attribute *attr,
7188                               const char *buf, size_t count)
7189 {
7190         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7191         char *p = (char *)buf;
7192         u32 val;
7193
7194         val = simple_strtoul(p, &p, 10);
7195         if (p == buf)
7196                 printk(KERN_INFO DRV_NAME
7197                        ": %s is not in decimal form.\n", buf);
7198         else
7199                 iwl4965_hw_reg_set_txpower(priv, val);
7200
7201         return count;
7202 }
7203
7204 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7205
7206 static ssize_t show_flags(struct device *d,
7207                           struct device_attribute *attr, char *buf)
7208 {
7209         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7210
7211         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7212 }
7213
7214 static ssize_t store_flags(struct device *d,
7215                            struct device_attribute *attr,
7216                            const char *buf, size_t count)
7217 {
7218         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7219         u32 flags = simple_strtoul(buf, NULL, 0);
7220
7221         mutex_lock(&priv->mutex);
7222         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7223                 /* Cancel any currently running scans... */
7224                 if (iwl4965_scan_cancel_timeout(priv, 100))
7225                         IWL_WARNING("Could not cancel scan.\n");
7226                 else {
7227                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7228                                        flags);
7229                         priv->staging_rxon.flags = cpu_to_le32(flags);
7230                         iwl4965_commit_rxon(priv);
7231                 }
7232         }
7233         mutex_unlock(&priv->mutex);
7234
7235         return count;
7236 }
7237
7238 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7239
7240 static ssize_t show_filter_flags(struct device *d,
7241                                  struct device_attribute *attr, char *buf)
7242 {
7243         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7244
7245         return sprintf(buf, "0x%04X\n",
7246                 le32_to_cpu(priv->active_rxon.filter_flags));
7247 }
7248
7249 static ssize_t store_filter_flags(struct device *d,
7250                                   struct device_attribute *attr,
7251                                   const char *buf, size_t count)
7252 {
7253         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7254         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7255
7256         mutex_lock(&priv->mutex);
7257         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7258                 /* Cancel any currently running scans... */
7259                 if (iwl4965_scan_cancel_timeout(priv, 100))
7260                         IWL_WARNING("Could not cancel scan.\n");
7261                 else {
7262                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7263                                        "0x%04X\n", filter_flags);
7264                         priv->staging_rxon.filter_flags =
7265                                 cpu_to_le32(filter_flags);
7266                         iwl4965_commit_rxon(priv);
7267                 }
7268         }
7269         mutex_unlock(&priv->mutex);
7270
7271         return count;
7272 }
7273
7274 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7275                    store_filter_flags);
7276
7277 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7278
7279 static ssize_t show_measurement(struct device *d,
7280                                 struct device_attribute *attr, char *buf)
7281 {
7282         struct iwl_priv *priv = dev_get_drvdata(d);
7283         struct iwl4965_spectrum_notification measure_report;
7284         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7285         u8 *data = (u8 *) & measure_report;
7286         unsigned long flags;
7287
7288         spin_lock_irqsave(&priv->lock, flags);
7289         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7290                 spin_unlock_irqrestore(&priv->lock, flags);
7291                 return 0;
7292         }
7293         memcpy(&measure_report, &priv->measure_report, size);
7294         priv->measurement_status = 0;
7295         spin_unlock_irqrestore(&priv->lock, flags);
7296
7297         while (size && (PAGE_SIZE - len)) {
7298                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7299                                    PAGE_SIZE - len, 1);
7300                 len = strlen(buf);
7301                 if (PAGE_SIZE - len)
7302                         buf[len++] = '\n';
7303
7304                 ofs += 16;
7305                 size -= min(size, 16U);
7306         }
7307
7308         return len;
7309 }
7310
7311 static ssize_t store_measurement(struct device *d,
7312                                  struct device_attribute *attr,
7313                                  const char *buf, size_t count)
7314 {
7315         struct iwl_priv *priv = dev_get_drvdata(d);
7316         struct ieee80211_measurement_params params = {
7317                 .channel = le16_to_cpu(priv->active_rxon.channel),
7318                 .start_time = cpu_to_le64(priv->last_tsf),
7319                 .duration = cpu_to_le16(1),
7320         };
7321         u8 type = IWL_MEASURE_BASIC;
7322         u8 buffer[32];
7323         u8 channel;
7324
7325         if (count) {
7326                 char *p = buffer;
7327                 strncpy(buffer, buf, min(sizeof(buffer), count));
7328                 channel = simple_strtoul(p, NULL, 0);
7329                 if (channel)
7330                         params.channel = channel;
7331
7332                 p = buffer;
7333                 while (*p && *p != ' ')
7334                         p++;
7335                 if (*p)
7336                         type = simple_strtoul(p + 1, NULL, 0);
7337         }
7338
7339         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7340                        "channel %d (for '%s')\n", type, params.channel, buf);
7341         iwl4965_get_measurement(priv, &params, type);
7342
7343         return count;
7344 }
7345
7346 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7347                    show_measurement, store_measurement);
7348 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7349
7350 static ssize_t store_retry_rate(struct device *d,
7351                                 struct device_attribute *attr,
7352                                 const char *buf, size_t count)
7353 {
7354         struct iwl_priv *priv = dev_get_drvdata(d);
7355
7356         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7357         if (priv->retry_rate <= 0)
7358                 priv->retry_rate = 1;
7359
7360         return count;
7361 }
7362
7363 static ssize_t show_retry_rate(struct device *d,
7364                                struct device_attribute *attr, char *buf)
7365 {
7366         struct iwl_priv *priv = dev_get_drvdata(d);
7367         return sprintf(buf, "%d", priv->retry_rate);
7368 }
7369
7370 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7371                    store_retry_rate);
7372
7373 static ssize_t store_power_level(struct device *d,
7374                                  struct device_attribute *attr,
7375                                  const char *buf, size_t count)
7376 {
7377         struct iwl_priv *priv = dev_get_drvdata(d);
7378         int rc;
7379         int mode;
7380
7381         mode = simple_strtoul(buf, NULL, 0);
7382         mutex_lock(&priv->mutex);
7383
7384         if (!iwl_is_ready(priv)) {
7385                 rc = -EAGAIN;
7386                 goto out;
7387         }
7388
7389         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7390                 mode = IWL_POWER_AC;
7391         else
7392                 mode |= IWL_POWER_ENABLED;
7393
7394         if (mode != priv->power_mode) {
7395                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7396                 if (rc) {
7397                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7398                         goto out;
7399                 }
7400                 priv->power_mode = mode;
7401         }
7402
7403         rc = count;
7404
7405  out:
7406         mutex_unlock(&priv->mutex);
7407         return rc;
7408 }
7409
7410 #define MAX_WX_STRING 80
7411
7412 /* Values are in microsecond */
7413 static const s32 timeout_duration[] = {
7414         350000,
7415         250000,
7416         75000,
7417         37000,
7418         25000,
7419 };
7420 static const s32 period_duration[] = {
7421         400000,
7422         700000,
7423         1000000,
7424         1000000,
7425         1000000
7426 };
7427
7428 static ssize_t show_power_level(struct device *d,
7429                                 struct device_attribute *attr, char *buf)
7430 {
7431         struct iwl_priv *priv = dev_get_drvdata(d);
7432         int level = IWL_POWER_LEVEL(priv->power_mode);
7433         char *p = buf;
7434
7435         p += sprintf(p, "%d ", level);
7436         switch (level) {
7437         case IWL_POWER_MODE_CAM:
7438         case IWL_POWER_AC:
7439                 p += sprintf(p, "(AC)");
7440                 break;
7441         case IWL_POWER_BATTERY:
7442                 p += sprintf(p, "(BATTERY)");
7443                 break;
7444         default:
7445                 p += sprintf(p,
7446                              "(Timeout %dms, Period %dms)",
7447                              timeout_duration[level - 1] / 1000,
7448                              period_duration[level - 1] / 1000);
7449         }
7450
7451         if (!(priv->power_mode & IWL_POWER_ENABLED))
7452                 p += sprintf(p, " OFF\n");
7453         else
7454                 p += sprintf(p, " \n");
7455
7456         return (p - buf + 1);
7457
7458 }
7459
7460 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7461                    store_power_level);
7462
7463 static ssize_t show_channels(struct device *d,
7464                              struct device_attribute *attr, char *buf)
7465 {
7466         /* all this shit doesn't belong into sysfs anyway */
7467         return 0;
7468 }
7469
7470 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7471
7472 static ssize_t show_statistics(struct device *d,
7473                                struct device_attribute *attr, char *buf)
7474 {
7475         struct iwl_priv *priv = dev_get_drvdata(d);
7476         u32 size = sizeof(struct iwl4965_notif_statistics);
7477         u32 len = 0, ofs = 0;
7478         u8 *data = (u8 *) & priv->statistics;
7479         int rc = 0;
7480
7481         if (!iwl_is_alive(priv))
7482                 return -EAGAIN;
7483
7484         mutex_lock(&priv->mutex);
7485         rc = iwl_send_statistics_request(priv, 0);
7486         mutex_unlock(&priv->mutex);
7487
7488         if (rc) {
7489                 len = sprintf(buf,
7490                               "Error sending statistics request: 0x%08X\n", rc);
7491                 return len;
7492         }
7493
7494         while (size && (PAGE_SIZE - len)) {
7495                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7496                                    PAGE_SIZE - len, 1);
7497                 len = strlen(buf);
7498                 if (PAGE_SIZE - len)
7499                         buf[len++] = '\n';
7500
7501                 ofs += 16;
7502                 size -= min(size, 16U);
7503         }
7504
7505         return len;
7506 }
7507
7508 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7509
7510 static ssize_t show_antenna(struct device *d,
7511                             struct device_attribute *attr, char *buf)
7512 {
7513         struct iwl_priv *priv = dev_get_drvdata(d);
7514
7515         if (!iwl_is_alive(priv))
7516                 return -EAGAIN;
7517
7518         return sprintf(buf, "%d\n", priv->antenna);
7519 }
7520
7521 static ssize_t store_antenna(struct device *d,
7522                              struct device_attribute *attr,
7523                              const char *buf, size_t count)
7524 {
7525         int ant;
7526         struct iwl_priv *priv = dev_get_drvdata(d);
7527
7528         if (count == 0)
7529                 return 0;
7530
7531         if (sscanf(buf, "%1i", &ant) != 1) {
7532                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7533                 return count;
7534         }
7535
7536         if ((ant >= 0) && (ant <= 2)) {
7537                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7538                 priv->antenna = (enum iwl4965_antenna)ant;
7539         } else
7540                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7541
7542
7543         return count;
7544 }
7545
7546 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7547
7548 static ssize_t show_status(struct device *d,
7549                            struct device_attribute *attr, char *buf)
7550 {
7551         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7552         if (!iwl_is_alive(priv))
7553                 return -EAGAIN;
7554         return sprintf(buf, "0x%08x\n", (int)priv->status);
7555 }
7556
7557 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7558
7559 static ssize_t dump_error_log(struct device *d,
7560                               struct device_attribute *attr,
7561                               const char *buf, size_t count)
7562 {
7563         char *p = (char *)buf;
7564
7565         if (p[0] == '1')
7566                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7567
7568         return strnlen(buf, count);
7569 }
7570
7571 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7572
7573 static ssize_t dump_event_log(struct device *d,
7574                               struct device_attribute *attr,
7575                               const char *buf, size_t count)
7576 {
7577         char *p = (char *)buf;
7578
7579         if (p[0] == '1')
7580                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7581
7582         return strnlen(buf, count);
7583 }
7584
7585 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7586
7587 /*****************************************************************************
7588  *
7589  * driver setup and teardown
7590  *
7591  *****************************************************************************/
7592
7593 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7594 {
7595         priv->workqueue = create_workqueue(DRV_NAME);
7596
7597         init_waitqueue_head(&priv->wait_command_queue);
7598
7599         INIT_WORK(&priv->up, iwl4965_bg_up);
7600         INIT_WORK(&priv->restart, iwl4965_bg_restart);
7601         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7602         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7603         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7604         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7605         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7606         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7607         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7608         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7609         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7610         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7611
7612         iwl4965_hw_setup_deferred_work(priv);
7613
7614         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7615                      iwl4965_irq_tasklet, (unsigned long)priv);
7616 }
7617
7618 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7619 {
7620         iwl4965_hw_cancel_deferred_work(priv);
7621
7622         cancel_delayed_work_sync(&priv->init_alive_start);
7623         cancel_delayed_work(&priv->scan_check);
7624         cancel_delayed_work(&priv->alive_start);
7625         cancel_delayed_work(&priv->post_associate);
7626         cancel_work_sync(&priv->beacon_update);
7627 }
7628
7629 static struct attribute *iwl4965_sysfs_entries[] = {
7630         &dev_attr_antenna.attr,
7631         &dev_attr_channels.attr,
7632         &dev_attr_dump_errors.attr,
7633         &dev_attr_dump_events.attr,
7634         &dev_attr_flags.attr,
7635         &dev_attr_filter_flags.attr,
7636 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7637         &dev_attr_measurement.attr,
7638 #endif
7639         &dev_attr_power_level.attr,
7640         &dev_attr_retry_rate.attr,
7641         &dev_attr_rs_window.attr,
7642         &dev_attr_statistics.attr,
7643         &dev_attr_status.attr,
7644         &dev_attr_temperature.attr,
7645         &dev_attr_tx_power.attr,
7646
7647         NULL
7648 };
7649
7650 static struct attribute_group iwl4965_attribute_group = {
7651         .name = NULL,           /* put in device directory */
7652         .attrs = iwl4965_sysfs_entries,
7653 };
7654
7655 static struct ieee80211_ops iwl4965_hw_ops = {
7656         .tx = iwl4965_mac_tx,
7657         .start = iwl4965_mac_start,
7658         .stop = iwl4965_mac_stop,
7659         .add_interface = iwl4965_mac_add_interface,
7660         .remove_interface = iwl4965_mac_remove_interface,
7661         .config = iwl4965_mac_config,
7662         .config_interface = iwl4965_mac_config_interface,
7663         .configure_filter = iwl4965_configure_filter,
7664         .set_key = iwl4965_mac_set_key,
7665         .update_tkip_key = iwl4965_mac_update_tkip_key,
7666         .get_stats = iwl4965_mac_get_stats,
7667         .get_tx_stats = iwl4965_mac_get_tx_stats,
7668         .conf_tx = iwl4965_mac_conf_tx,
7669         .get_tsf = iwl4965_mac_get_tsf,
7670         .reset_tsf = iwl4965_mac_reset_tsf,
7671         .beacon_update = iwl4965_mac_beacon_update,
7672         .bss_info_changed = iwl4965_bss_info_changed,
7673 #ifdef CONFIG_IWL4965_HT
7674         .ampdu_action = iwl4965_mac_ampdu_action,
7675 #endif  /* CONFIG_IWL4965_HT */
7676         .hw_scan = iwl4965_mac_hw_scan
7677 };
7678
7679 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7680 {
7681         int err = 0;
7682         struct iwl_priv *priv;
7683         struct ieee80211_hw *hw;
7684         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7685         unsigned long flags;
7686         DECLARE_MAC_BUF(mac);
7687
7688         /************************
7689          * 1. Allocating HW data
7690          ************************/
7691
7692         /* Disabling hardware scan means that mac80211 will perform scans
7693          * "the hard way", rather than using device's scan. */
7694         if (cfg->mod_params->disable_hw_scan) {
7695                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7696                 iwl4965_hw_ops.hw_scan = NULL;
7697         }
7698
7699         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7700         if (!hw) {
7701                 err = -ENOMEM;
7702                 goto out;
7703         }
7704         priv = hw->priv;
7705         /* At this point both hw and priv are allocated. */
7706
7707         SET_IEEE80211_DEV(hw, &pdev->dev);
7708
7709         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7710         priv->cfg = cfg;
7711         priv->pci_dev = pdev;
7712
7713 #ifdef CONFIG_IWLWIFI_DEBUG
7714         iwl_debug_level = priv->cfg->mod_params->debug;
7715         atomic_set(&priv->restrict_refcnt, 0);
7716 #endif
7717
7718         /**************************
7719          * 2. Initializing PCI bus
7720          **************************/
7721         if (pci_enable_device(pdev)) {
7722                 err = -ENODEV;
7723                 goto out_ieee80211_free_hw;
7724         }
7725
7726         pci_set_master(pdev);
7727
7728         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7729         if (!err)
7730                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7731                 if (err) {
7732                         printk(KERN_WARNING DRV_NAME
7733                                 ": No suitable DMA available.\n");
7734                         goto out_pci_disable_device;
7735         }
7736
7737         err = pci_request_regions(pdev, DRV_NAME);
7738         if (err)
7739                 goto out_pci_disable_device;
7740
7741         pci_set_drvdata(pdev, priv);
7742
7743         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7744          * PCI Tx retries from interfering with C3 CPU state */
7745         pci_write_config_byte(pdev, 0x41, 0x00);
7746
7747         /***********************
7748          * 3. Read REV register
7749          ***********************/
7750         priv->hw_base = pci_iomap(pdev, 0, 0);
7751         if (!priv->hw_base) {
7752                 err = -ENODEV;
7753                 goto out_pci_release_regions;
7754         }
7755
7756         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7757                 (unsigned long long) pci_resource_len(pdev, 0));
7758         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7759
7760         printk(KERN_INFO DRV_NAME
7761                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7762
7763         /*****************
7764          * 4. Read EEPROM
7765          *****************/
7766         /* nic init */
7767         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7768                 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7769
7770         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7771         err = iwl_poll_bit(priv, CSR_GP_CNTRL,
7772                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7773                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7774         if (err < 0) {
7775                 IWL_DEBUG_INFO("Failed to init the card\n");
7776                 goto out_iounmap;
7777         }
7778         /* Read the EEPROM */
7779         err = iwl_eeprom_init(priv);
7780         if (err) {
7781                 IWL_ERROR("Unable to init EEPROM\n");
7782                 goto out_iounmap;
7783         }
7784         /* MAC Address location in EEPROM same for 3945/4965 */
7785         iwl_eeprom_get_mac(priv, priv->mac_addr);
7786         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7787         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7788
7789         /************************
7790          * 5. Setup HW constants
7791          ************************/
7792         /* Device-specific setup */
7793         if (priv->cfg->ops->lib->set_hw_params(priv)) {
7794                 IWL_ERROR("failed to set hw parameters\n");
7795                 goto out_iounmap;
7796         }
7797
7798         /*******************
7799          * 6. Setup hw/priv
7800          *******************/
7801
7802         err = iwl_setup(priv);
7803         if (err)
7804                 goto out_unset_hw_params;
7805         /* At this point both hw and priv are initialized. */
7806
7807         /**********************************
7808          * 7. Initialize module parameters
7809          **********************************/
7810
7811         /* Disable radio (SW RF KILL) via parameter when loading driver */
7812         if (priv->cfg->mod_params->disable) {
7813                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7814                 IWL_DEBUG_INFO("Radio disabled.\n");
7815         }
7816
7817         if (priv->cfg->mod_params->enable_qos)
7818                 priv->qos_data.qos_enable = 1;
7819
7820         /********************
7821          * 8. Setup services
7822          ********************/
7823         spin_lock_irqsave(&priv->lock, flags);
7824         iwl4965_disable_interrupts(priv);
7825         spin_unlock_irqrestore(&priv->lock, flags);
7826
7827         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7828         if (err) {
7829                 IWL_ERROR("failed to create sysfs device attributes\n");
7830                 goto out_unset_hw_params;
7831         }
7832
7833         err = iwl_dbgfs_register(priv, DRV_NAME);
7834         if (err) {
7835                 IWL_ERROR("failed to create debugfs files\n");
7836                 goto out_remove_sysfs;
7837         }
7838
7839         iwl4965_setup_deferred_work(priv);
7840         iwl4965_setup_rx_handlers(priv);
7841
7842         /********************
7843          * 9. Conclude
7844          ********************/
7845         pci_save_state(pdev);
7846         pci_disable_device(pdev);
7847
7848         /* notify iwlcore to init */
7849         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7850         return 0;
7851
7852  out_remove_sysfs:
7853         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7854  out_unset_hw_params:
7855         iwl4965_unset_hw_params(priv);
7856  out_iounmap:
7857         pci_iounmap(pdev, priv->hw_base);
7858  out_pci_release_regions:
7859         pci_release_regions(pdev);
7860         pci_set_drvdata(pdev, NULL);
7861  out_pci_disable_device:
7862         pci_disable_device(pdev);
7863  out_ieee80211_free_hw:
7864         ieee80211_free_hw(priv->hw);
7865  out:
7866         return err;
7867 }
7868
7869 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7870 {
7871         struct iwl_priv *priv = pci_get_drvdata(pdev);
7872         struct list_head *p, *q;
7873         int i;
7874         unsigned long flags;
7875
7876         if (!priv)
7877                 return;
7878
7879         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7880
7881         if (priv->mac80211_registered) {
7882                 ieee80211_unregister_hw(priv->hw);
7883                 priv->mac80211_registered = 0;
7884         }
7885
7886         set_bit(STATUS_EXIT_PENDING, &priv->status);
7887
7888         iwl4965_down(priv);
7889
7890         /* make sure we flush any pending irq or
7891          * tasklet for the driver
7892          */
7893         spin_lock_irqsave(&priv->lock, flags);
7894         iwl4965_disable_interrupts(priv);
7895         spin_unlock_irqrestore(&priv->lock, flags);
7896
7897         iwl_synchronize_irq(priv);
7898
7899         /* Free MAC hash list for ADHOC */
7900         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7901                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7902                         list_del(p);
7903                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7904                 }
7905         }
7906
7907         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7908         iwl_dbgfs_unregister(priv);
7909         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7910
7911         iwl4965_dealloc_ucode_pci(priv);
7912
7913         if (priv->rxq.bd)
7914                 iwl4965_rx_queue_free(priv, &priv->rxq);
7915         iwl4965_hw_txq_ctx_free(priv);
7916
7917         iwl4965_unset_hw_params(priv);
7918         iwlcore_clear_stations_table(priv);
7919
7920
7921         /*netif_stop_queue(dev); */
7922         flush_workqueue(priv->workqueue);
7923
7924         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7925          * priv->workqueue... so we can't take down the workqueue
7926          * until now... */
7927         destroy_workqueue(priv->workqueue);
7928         priv->workqueue = NULL;
7929
7930         pci_iounmap(pdev, priv->hw_base);
7931         pci_release_regions(pdev);
7932         pci_disable_device(pdev);
7933         pci_set_drvdata(pdev, NULL);
7934
7935         iwl_free_channel_map(priv);
7936         iwl4965_free_geos(priv);
7937
7938         if (priv->ibss_beacon)
7939                 dev_kfree_skb(priv->ibss_beacon);
7940
7941         ieee80211_free_hw(priv->hw);
7942 }
7943
7944 #ifdef CONFIG_PM
7945
7946 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7947 {
7948         struct iwl_priv *priv = pci_get_drvdata(pdev);
7949
7950         if (priv->is_open) {
7951                 set_bit(STATUS_IN_SUSPEND, &priv->status);
7952                 iwl4965_mac_stop(priv->hw);
7953                 priv->is_open = 1;
7954         }
7955
7956         pci_set_power_state(pdev, PCI_D3hot);
7957
7958         return 0;
7959 }
7960
7961 static int iwl4965_pci_resume(struct pci_dev *pdev)
7962 {
7963         struct iwl_priv *priv = pci_get_drvdata(pdev);
7964
7965         pci_set_power_state(pdev, PCI_D0);
7966
7967         if (priv->is_open)
7968                 iwl4965_mac_start(priv->hw);
7969
7970         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7971         return 0;
7972 }
7973
7974 #endif /* CONFIG_PM */
7975
7976 /*****************************************************************************
7977  *
7978  * driver and module entry point
7979  *
7980  *****************************************************************************/
7981
7982 /* Hardware specific file defines the PCI IDs table for that hardware module */
7983 static struct pci_device_id iwl_hw_card_ids[] = {
7984         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7985         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7986         {0}
7987 };
7988 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7989
7990 static struct pci_driver iwl_driver = {
7991         .name = DRV_NAME,
7992         .id_table = iwl_hw_card_ids,
7993         .probe = iwl4965_pci_probe,
7994         .remove = __devexit_p(iwl4965_pci_remove),
7995 #ifdef CONFIG_PM
7996         .suspend = iwl4965_pci_suspend,
7997         .resume = iwl4965_pci_resume,
7998 #endif
7999 };
8000
8001 static int __init iwl4965_init(void)
8002 {
8003
8004         int ret;
8005         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8006         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8007
8008         ret = iwl4965_rate_control_register();
8009         if (ret) {
8010                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8011                 return ret;
8012         }
8013
8014         ret = pci_register_driver(&iwl_driver);
8015         if (ret) {
8016                 IWL_ERROR("Unable to initialize PCI module\n");
8017                 goto error_register;
8018         }
8019 #ifdef CONFIG_IWLWIFI_DEBUG
8020         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8021         if (ret) {
8022                 IWL_ERROR("Unable to create driver sysfs file\n");
8023                 goto error_debug;
8024         }
8025 #endif
8026
8027         return ret;
8028
8029 #ifdef CONFIG_IWLWIFI_DEBUG
8030 error_debug:
8031         pci_unregister_driver(&iwl_driver);
8032 #endif
8033 error_register:
8034         iwl4965_rate_control_unregister();
8035         return ret;
8036 }
8037
8038 static void __exit iwl4965_exit(void)
8039 {
8040 #ifdef CONFIG_IWLWIFI_DEBUG
8041         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8042 #endif
8043         pci_unregister_driver(&iwl_driver);
8044         iwl4965_rate_control_unregister();
8045 }
8046
8047 module_exit(iwl4965_exit);
8048 module_init(iwl4965_init);