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