err.no Git - 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_setting.bcast_sta_id;
 402         else
 403                 for (i = IWL_STA_ID; i < priv->hw_setting.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_setting.bcast_sta_id;
 444         else
 445                 for (i = IWL_STA_ID; i < priv->hw_setting.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_setting.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         ret = iwl4965_tx_queue_update_wr_ptr(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         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 int iwl4965_send_statistics_request(struct iwl_priv *priv)
 600 {
 601         u32 flags = 0;
 602         return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 603                                       sizeof(flags), &flags);
 604 }
 605
 606 /**
 607  * iwl4965_rxon_add_station - add station into station table.
 608  *
 609  * there is only one AP station with id= IWL_AP_ID
 610  * NOTE: mutex must be held before calling this fnction
 611  */
 612 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 613                                 const u8 *addr, int is_ap)
 614 {
 615         u8 sta_id;
 616
 617         /* Add station to device's station table */
 618 #ifdef CONFIG_IWL4965_HT
 619         struct ieee80211_conf *conf = &priv->hw->conf;
 620         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 621
 622         if ((is_ap) &&
 623             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 624             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 625                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 626                                                    0, cur_ht_config);
 627         else
 628 #endif /* CONFIG_IWL4965_HT */
 629                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 630                                                    0, NULL);
 631
 632         /* Set up default rate scaling table in device's station table */
 633         iwl4965_add_station(priv, addr, is_ap);
 634
 635         return sta_id;
 636 }
 637
 638 /**
 639  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 640  *
 641  * NOTE:  This is really only useful during development and can eventually
 642  * be #ifdef'd out once the driver is stable and folks aren't actively
 643  * making changes
 644  */
 645 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 646 {
 647         int error = 0;
 648         int counter = 1;
 649
 650         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 651                 error |= le32_to_cpu(rxon->flags &
 652                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 653                                  RXON_FLG_RADAR_DETECT_MSK));
 654                 if (error)
 655                         IWL_WARNING("check 24G fields %d | %d\n",
 656                                     counter++, error);
 657         } else {
 658                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 659                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 660                 if (error)
 661                         IWL_WARNING("check 52 fields %d | %d\n",
 662                                     counter++, error);
 663                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 664                 if (error)
 665                         IWL_WARNING("check 52 CCK %d | %d\n",
 666                                     counter++, error);
 667         }
 668         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 669         if (error)
 670                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 671
 672         /* make sure basic rates 6Mbps and 1Mbps are supported */
 673         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 674                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 675         if (error)
 676                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 677
 678         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 679         if (error)
 680                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 681
 682         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 683                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 684         if (error)
 685                 IWL_WARNING("check CCK and short slot %d | %d\n",
 686                             counter++, error);
 687
 688         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 689                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 690         if (error)
 691                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 692                             counter++, error);
 693
 694         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 695                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 696         if (error)
 697                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 698                             counter++, error);
 699
 700         if (error)
 701                 IWL_WARNING("Tuning to channel %d\n",
 702                             le16_to_cpu(rxon->channel));
 703
 704         if (error) {
 705                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 706                 return -1;
 707         }
 708         return 0;
 709 }
 710
 711 /**
 712  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 713  * @priv: staging_rxon is compared to active_rxon
 714  *
 715  * If the RXON structure is changing enough to require a new tune,
 716  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 717  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 718  */
 719 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 720 {
 721
 722         /* These items are only settable from the full RXON command */
 723         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 724             compare_ether_addr(priv->staging_rxon.bssid_addr,
 725                                priv->active_rxon.bssid_addr) ||
 726             compare_ether_addr(priv->staging_rxon.node_addr,
 727                                priv->active_rxon.node_addr) ||
 728             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 729                                priv->active_rxon.wlap_bssid_addr) ||
 730             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 731             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 732             (priv->staging_rxon.air_propagation !=
 733              priv->active_rxon.air_propagation) ||
 734             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 735              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 736             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 737              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 738             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 739             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 740                 return 1;
 741
 742         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 743          * be updated with the RXON_ASSOC command -- however only some
 744          * flag transitions are allowed using RXON_ASSOC */
 745
 746         /* Check if we are not switching bands */
 747         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 748             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 749                 return 1;
 750
 751         /* Check if we are switching association toggle */
 752         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 753                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 754                 return 1;
 755
 756         return 0;
 757 }
 758
 759 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
 760 {
 761         int rc = 0;
 762         struct iwl4965_rx_packet *res = NULL;
 763         struct iwl4965_rxon_assoc_cmd rxon_assoc;
 764         struct iwl_host_cmd cmd = {
 765                 .id = REPLY_RXON_ASSOC,
 766                 .len = sizeof(rxon_assoc),
 767                 .meta.flags = CMD_WANT_SKB,
 768                 .data = &rxon_assoc,
 769         };
 770         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
 771         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
 772
 773         if ((rxon1->flags == rxon2->flags) &&
 774             (rxon1->filter_flags == rxon2->filter_flags) &&
 775             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 776             (rxon1->ofdm_ht_single_stream_basic_rates ==
 777              rxon2->ofdm_ht_single_stream_basic_rates) &&
 778             (rxon1->ofdm_ht_dual_stream_basic_rates ==
 779              rxon2->ofdm_ht_dual_stream_basic_rates) &&
 780             (rxon1->rx_chain == rxon2->rx_chain) &&
 781             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 782                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
 783                 return 0;
 784         }
 785
 786         rxon_assoc.flags = priv->staging_rxon.flags;
 787         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
 788         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
 789         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
 790         rxon_assoc.reserved = 0;
 791         rxon_assoc.ofdm_ht_single_stream_basic_rates =
 792             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
 793         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
 794             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
 795         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
 796
 797         rc = iwl_send_cmd_sync(priv, &cmd);
 798         if (rc)
 799                 return rc;
 800
 801         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 802         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 803                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
 804                 rc = -EIO;
 805         }
 806
 807         priv->alloc_rxb_skb--;
 808         dev_kfree_skb_any(cmd.meta.u.skb);
 809
 810         return rc;
 811 }
 812
 813 /**
 814  * iwl4965_commit_rxon - commit staging_rxon to hardware
 815  *
 816  * The RXON command in staging_rxon is committed to the hardware and
 817  * the active_rxon structure is updated with the new data.  This
 818  * function correctly transitions out of the RXON_ASSOC_MSK state if
 819  * a HW tune is required based on the RXON structure changes.
 820  */
 821 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 822 {
 823         /* cast away the const for active_rxon in this function */
 824         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 825         DECLARE_MAC_BUF(mac);
 826         int rc = 0;
 827
 828         if (!iwl_is_alive(priv))
 829                 return -1;
 830
 831         /* always get timestamp with Rx frame */
 832         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 833
 834         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 835         if (rc) {
 836                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 837                 return -EINVAL;
 838         }
 839
 840         /* If we don't need to send a full RXON, we can use
 841          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 842          * and other flags for the current radio configuration. */
 843         if (!iwl4965_full_rxon_required(priv)) {
 844                 rc = iwl4965_send_rxon_assoc(priv);
 845                 if (rc) {
 846                         IWL_ERROR("Error setting RXON_ASSOC "
 847                                   "configuration (%d).\n", rc);
 848                         return rc;
 849                 }
 850
 851                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 852
 853                 return 0;
 854         }
 855
 856         /* station table will be cleared */
 857         priv->assoc_station_added = 0;
 858
 859 #ifdef CONFIG_IWL4965_SENSITIVITY
 860         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
 861         if (!priv->error_recovering)
 862                 priv->start_calib = 0;
 863
 864         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
 865 #endif /* CONFIG_IWL4965_SENSITIVITY */
 866
 867         /* If we are currently associated and the new config requires
 868          * an RXON_ASSOC and the new config wants the associated mask enabled,
 869          * we must clear the associated from the active configuration
 870          * before we apply the new config */
 871         if (iwl_is_associated(priv) &&
 872             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 873                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 874                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 875
 876                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 877                                       sizeof(struct iwl4965_rxon_cmd),
 878                                       &priv->active_rxon);
 879
 880                 /* If the mask clearing failed then we set
 881                  * active_rxon back to what it was previously */
 882                 if (rc) {
 883                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 884                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 885                                   "configuration (%d).\n", rc);
 886                         return rc;
 887                 }
 888         }
 889
 890         IWL_DEBUG_INFO("Sending RXON\n"
 891                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 892                        "* channel = %d\n"
 893                        "* bssid = %s\n",
 894                        ((priv->staging_rxon.filter_flags &
 895                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 896                        le16_to_cpu(priv->staging_rxon.channel),
 897                        print_mac(mac, priv->staging_rxon.bssid_addr));
 898
 899         iwl4965_set_rxon_hwcrypto(priv, priv->cfg->mod_params->hw_crypto);
 900         /* Apply the new configuration */
 901         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 902                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
 903         if (rc) {
 904                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 905                 return rc;
 906         }
 907
 908         iwlcore_clear_stations_table(priv);
 909
 910 #ifdef CONFIG_IWL4965_SENSITIVITY
 911         if (!priv->error_recovering)
 912                 priv->start_calib = 0;
 913
 914         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
 915         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
 916 #endif /* CONFIG_IWL4965_SENSITIVITY */
 917
 918         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 919
 920         /* If we issue a new RXON command which required a tune then we must
 921          * send a new TXPOWER command or we won't be able to Tx any frames */
 922         rc = iwl4965_hw_reg_send_txpower(priv);
 923         if (rc) {
 924                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 925                 return rc;
 926         }
 927
 928         /* Add the broadcast address so we can send broadcast frames */
 929         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
 930             IWL_INVALID_STATION) {
 931                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 932                 return -EIO;
 933         }
 934
 935         /* If we have set the ASSOC_MSK and we are in BSS mode then
 936          * add the IWL_AP_ID to the station rate table */
 937         if (iwl_is_associated(priv) &&
 938             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 939                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 940                     == IWL_INVALID_STATION) {
 941                         IWL_ERROR("Error adding AP address for transmit.\n");
 942                         return -EIO;
 943                 }
 944                 priv->assoc_station_added = 1;
 945                 if (priv->default_wep_key &&
 946                     iwl_send_static_wepkey_cmd(priv, 0))
 947                         IWL_ERROR("Could not send WEP static key.\n");
 948         }
 949
 950         return 0;
 951 }
 952
 953 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 954 {
 955         struct iwl4965_bt_cmd bt_cmd = {
 956                 .flags = 3,
 957                 .lead_time = 0xAA,
 958                 .max_kill = 1,
 959                 .kill_ack_mask = 0,
 960                 .kill_cts_mask = 0,
 961         };
 962
 963         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 964                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 965 }
 966
 967 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
 968 {
 969         int rc = 0;
 970         struct iwl4965_rx_packet *res;
 971         struct iwl_host_cmd cmd = {
 972                 .id = REPLY_SCAN_ABORT_CMD,
 973                 .meta.flags = CMD_WANT_SKB,
 974         };
 975
 976         /* If there isn't a scan actively going on in the hardware
 977          * then we are in between scan bands and not actually
 978          * actively scanning, so don't send the abort command */
 979         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 980                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 981                 return 0;
 982         }
 983
 984         rc = iwl_send_cmd_sync(priv, &cmd);
 985         if (rc) {
 986                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 987                 return rc;
 988         }
 989
 990         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 991         if (res->u.status != CAN_ABORT_STATUS) {
 992                 /* The scan abort will return 1 for success or
 993                  * 2 for "failure".  A failure condition can be
 994                  * due to simply not being in an active scan which
 995                  * can occur if we send the scan abort before we
 996                  * the microcode has notified us that a scan is
 997                  * completed. */
 998                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 999                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1000                 clear_bit(STATUS_SCAN_HW, &priv->status);
1001         }
1002
1003         dev_kfree_skb_any(cmd.meta.u.skb);
1004
1005         return rc;
1006 }
1007
1008 static int iwl4965_card_state_sync_callback(struct iwl_priv *priv,
1009                                         struct iwl_cmd *cmd,
1010                                         struct sk_buff *skb)
1011 {
1012         return 1;
1013 }
1014
1015 /*
1016  * CARD_STATE_CMD
1017  *
1018  * Use: Sets the device's internal card state to enable, disable, or halt
1019  *
1020  * When in the 'enable' state the card operates as normal.
1021  * When in the 'disable' state, the card enters into a low power mode.
1022  * When in the 'halt' state, the card is shut down and must be fully
1023  * restarted to come back on.
1024  */
1025 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1026 {
1027         struct iwl_host_cmd cmd = {
1028                 .id = REPLY_CARD_STATE_CMD,
1029                 .len = sizeof(u32),
1030                 .data = &flags,
1031                 .meta.flags = meta_flag,
1032         };
1033
1034         if (meta_flag & CMD_ASYNC)
1035                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1036
1037         return iwl_send_cmd(priv, &cmd);
1038 }
1039
1040 static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
1041                                      struct iwl_cmd *cmd, struct sk_buff *skb)
1042 {
1043         struct iwl4965_rx_packet *res = NULL;
1044
1045         if (!skb) {
1046                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1047                 return 1;
1048         }
1049
1050         res = (struct iwl4965_rx_packet *)skb->data;
1051         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1052                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1053                           res->hdr.flags);
1054                 return 1;
1055         }
1056
1057         switch (res->u.add_sta.status) {
1058         case ADD_STA_SUCCESS_MSK:
1059                 break;
1060         default:
1061                 break;
1062         }
1063
1064         /* We didn't cache the SKB; let the caller free it */
1065         return 1;
1066 }
1067
1068 int iwl4965_send_add_station(struct iwl_priv *priv,
1069                          struct iwl4965_addsta_cmd *sta, u8 flags)
1070 {
1071         struct iwl4965_rx_packet *res = NULL;
1072         int rc = 0;
1073         struct iwl_host_cmd cmd = {
1074                 .id = REPLY_ADD_STA,
1075                 .len = sizeof(struct iwl4965_addsta_cmd),
1076                 .meta.flags = flags,
1077                 .data = sta,
1078         };
1079
1080         if (flags & CMD_ASYNC)
1081                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1082         else
1083                 cmd.meta.flags |= CMD_WANT_SKB;
1084
1085         rc = iwl_send_cmd(priv, &cmd);
1086
1087         if (rc || (flags & CMD_ASYNC))
1088                 return rc;
1089
1090         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1091         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1092                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1093                           res->hdr.flags);
1094                 rc = -EIO;
1095         }
1096
1097         if (rc == 0) {
1098                 switch (res->u.add_sta.status) {
1099                 case ADD_STA_SUCCESS_MSK:
1100                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1101                         break;
1102                 default:
1103                         rc = -EIO;
1104                         IWL_WARNING("REPLY_ADD_STA failed\n");
1105                         break;
1106                 }
1107         }
1108
1109         priv->alloc_rxb_skb--;
1110         dev_kfree_skb_any(cmd.meta.u.skb);
1111
1112         return rc;
1113 }
1114
1115 static int iwl4965_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
1116                                    struct ieee80211_key_conf *keyconf,
1117                                    u8 sta_id)
1118 {
1119         unsigned long flags;
1120         __le16 key_flags = 0;
1121
1122         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
1123         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1124
1125         if (sta_id == priv->hw_setting.bcast_sta_id)
1126                 key_flags |= STA_KEY_MULTICAST_MSK;
1127
1128         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1129         keyconf->hw_key_idx = keyconf->keyidx;
1130
1131         key_flags &= ~STA_KEY_FLG_INVALID;
1132
1133         spin_lock_irqsave(&priv->sta_lock, flags);
1134         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1135         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1136
1137         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1138                keyconf->keylen);
1139
1140         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1141                keyconf->keylen);
1142
1143         priv->stations[sta_id].sta.key.key_offset
1144                         = (sta_id % STA_KEY_MAX_NUM);/*FIXME*/
1145         priv->stations[sta_id].sta.key.key_flags = key_flags;
1146         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1147         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1148
1149         spin_unlock_irqrestore(&priv->sta_lock, flags);
1150
1151         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1152         return iwl4965_send_add_station(priv,
1153                                 &priv->stations[sta_id].sta, CMD_ASYNC);
1154 }
1155
1156 static int iwl4965_set_tkip_dynamic_key_info(struct iwl_priv *priv,
1157                                    struct ieee80211_key_conf *keyconf,
1158                                    u8 sta_id)
1159 {
1160         unsigned long flags;
1161         int ret = 0;
1162
1163         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1164         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1165         keyconf->hw_key_idx = keyconf->keyidx;
1166
1167         spin_lock_irqsave(&priv->sta_lock, flags);
1168
1169         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1170         priv->stations[sta_id].keyinfo.conf = keyconf;
1171         priv->stations[sta_id].keyinfo.keylen = 16;
1172
1173         /* This copy is acutally not needed: we get the key with each TX */
1174         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1175
1176         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1177
1178         spin_unlock_irqrestore(&priv->sta_lock, flags);
1179
1180         return ret;
1181 }
1182
1183 static int iwl4965_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1184 {
1185         unsigned long flags;
1186
1187         priv->key_mapping_key = 0;
1188
1189         spin_lock_irqsave(&priv->sta_lock, flags);
1190         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1191         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1192         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1193         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1194         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1195         spin_unlock_irqrestore(&priv->sta_lock, flags);
1196
1197         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1198         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1199         return 0;
1200 }
1201
1202 static int iwl4965_set_dynamic_key(struct iwl_priv *priv,
1203                                 struct ieee80211_key_conf *key, u8 sta_id)
1204 {
1205         int ret;
1206
1207         priv->key_mapping_key = 1;
1208
1209         switch (key->alg) {
1210         case ALG_CCMP:
1211                 ret = iwl4965_set_ccmp_dynamic_key_info(priv, key, sta_id);
1212                 break;
1213         case ALG_TKIP:
1214                 ret = iwl4965_set_tkip_dynamic_key_info(priv, key, sta_id);
1215                 break;
1216         case ALG_WEP:
1217                 ret = -EOPNOTSUPP;
1218                 break;
1219         default:
1220                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
1221                 ret = -EINVAL;
1222         }
1223
1224         return ret;
1225 }
1226
1227 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1228 {
1229         struct list_head *element;
1230
1231         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1232                        priv->frames_count);
1233
1234         while (!list_empty(&priv->free_frames)) {
1235                 element = priv->free_frames.next;
1236                 list_del(element);
1237                 kfree(list_entry(element, struct iwl4965_frame, list));
1238                 priv->frames_count--;
1239         }
1240
1241         if (priv->frames_count) {
1242                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1243                             priv->frames_count);
1244                 priv->frames_count = 0;
1245         }
1246 }
1247
1248 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1249 {
1250         struct iwl4965_frame *frame;
1251         struct list_head *element;
1252         if (list_empty(&priv->free_frames)) {
1253                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1254                 if (!frame) {
1255                         IWL_ERROR("Could not allocate frame!\n");
1256                         return NULL;
1257                 }
1258
1259                 priv->frames_count++;
1260                 return frame;
1261         }
1262
1263         element = priv->free_frames.next;
1264         list_del(element);
1265         return list_entry(element, struct iwl4965_frame, list);
1266 }
1267
1268 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1269 {
1270         memset(frame, 0, sizeof(*frame));
1271         list_add(&frame->list, &priv->free_frames);
1272 }
1273
1274 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1275                                 struct ieee80211_hdr *hdr,
1276                                 const u8 *dest, int left)
1277 {
1278
1279         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1280             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1281              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1282                 return 0;
1283
1284         if (priv->ibss_beacon->len > left)
1285                 return 0;
1286
1287         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1288
1289         return priv->ibss_beacon->len;
1290 }
1291
1292 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1293 {
1294         u8 i;
1295
1296         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1297              i = iwl4965_rates[i].next_ieee) {
1298                 if (rate_mask & (1 << i))
1299                         return iwl4965_rates[i].plcp;
1300         }
1301
1302         return IWL_RATE_INVALID;
1303 }
1304
1305 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1306 {
1307         struct iwl4965_frame *frame;
1308         unsigned int frame_size;
1309         int rc;
1310         u8 rate;
1311
1312         frame = iwl4965_get_free_frame(priv);
1313
1314         if (!frame) {
1315                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1316                           "command.\n");
1317                 return -ENOMEM;
1318         }
1319
1320         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1321                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1322                                                 0xFF0);
1323                 if (rate == IWL_INVALID_RATE)
1324                         rate = IWL_RATE_6M_PLCP;
1325         } else {
1326                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1327                 if (rate == IWL_INVALID_RATE)
1328                         rate = IWL_RATE_1M_PLCP;
1329         }
1330
1331         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1332
1333         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1334                               &frame->u.cmd[0]);
1335
1336         iwl4965_free_frame(priv, frame);
1337
1338         return rc;
1339 }
1340
1341 /******************************************************************************
1342  *
1343  * Misc. internal state and helper functions
1344  *
1345  ******************************************************************************/
1346
1347 static void iwl4965_unset_hw_setting(struct iwl_priv *priv)
1348 {
1349         if (priv->hw_setting.shared_virt)
1350                 pci_free_consistent(priv->pci_dev,
1351                                     sizeof(struct iwl4965_shared),
1352                                     priv->hw_setting.shared_virt,
1353                                     priv->hw_setting.shared_phys);
1354 }
1355
1356 /**
1357  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1358  *
1359  * return : set the bit for each supported rate insert in ie
1360  */
1361 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1362                                     u16 basic_rate, int *left)
1363 {
1364         u16 ret_rates = 0, bit;
1365         int i;
1366         u8 *cnt = ie;
1367         u8 *rates = ie + 1;
1368
1369         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1370                 if (bit & supported_rate) {
1371                         ret_rates |= bit;
1372                         rates[*cnt] = iwl4965_rates[i].ieee |
1373                                 ((bit & basic_rate) ? 0x80 : 0x00);
1374                         (*cnt)++;
1375                         (*left)--;
1376                         if ((*left <= 0) ||
1377                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1378                                 break;
1379                 }
1380         }
1381
1382         return ret_rates;
1383 }
1384
1385 /**
1386  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1387  */
1388 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1389                                   enum ieee80211_band band,
1390                                   struct ieee80211_mgmt *frame,
1391                                   int left, int is_direct)
1392 {
1393         int len = 0;
1394         u8 *pos = NULL;
1395         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1396 #ifdef CONFIG_IWL4965_HT
1397         const struct ieee80211_supported_band *sband =
1398                                                 iwl4965_get_hw_mode(priv, band);
1399 #endif /* CONFIG_IWL4965_HT */
1400
1401         /* Make sure there is enough space for the probe request,
1402          * two mandatory IEs and the data */
1403         left -= 24;
1404         if (left < 0)
1405                 return 0;
1406         len += 24;
1407
1408         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1409         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1410         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1411         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1412         frame->seq_ctrl = 0;
1413
1414         /* fill in our indirect SSID IE */
1415         /* ...next IE... */
1416
1417         left -= 2;
1418         if (left < 0)
1419                 return 0;
1420         len += 2;
1421         pos = &(frame->u.probe_req.variable[0]);
1422         *pos++ = WLAN_EID_SSID;
1423         *pos++ = 0;
1424
1425         /* fill in our direct SSID IE... */
1426         if (is_direct) {
1427                 /* ...next IE... */
1428                 left -= 2 + priv->essid_len;
1429                 if (left < 0)
1430                         return 0;
1431                 /* ... fill it in... */
1432                 *pos++ = WLAN_EID_SSID;
1433                 *pos++ = priv->essid_len;
1434                 memcpy(pos, priv->essid, priv->essid_len);
1435                 pos += priv->essid_len;
1436                 len += 2 + priv->essid_len;
1437         }
1438
1439         /* fill in supported rate */
1440         /* ...next IE... */
1441         left -= 2;
1442         if (left < 0)
1443                 return 0;
1444
1445         /* ... fill it in... */
1446         *pos++ = WLAN_EID_SUPP_RATES;
1447         *pos = 0;
1448
1449         /* exclude 60M rate */
1450         active_rates = priv->rates_mask;
1451         active_rates &= ~IWL_RATE_60M_MASK;
1452
1453         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1454
1455         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1456         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1457                         active_rate_basic, &left);
1458         active_rates &= ~ret_rates;
1459
1460         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1461                                  active_rate_basic, &left);
1462         active_rates &= ~ret_rates;
1463
1464         len += 2 + *pos;
1465         pos += (*pos) + 1;
1466         if (active_rates == 0)
1467                 goto fill_end;
1468
1469         /* fill in supported extended rate */
1470         /* ...next IE... */
1471         left -= 2;
1472         if (left < 0)
1473                 return 0;
1474         /* ... fill it in... */
1475         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1476         *pos = 0;
1477         iwl4965_supported_rate_to_ie(pos, active_rates,
1478                                  active_rate_basic, &left);
1479         if (*pos > 0)
1480                 len += 2 + *pos;
1481
1482 #ifdef CONFIG_IWL4965_HT
1483         if (sband && sband->ht_info.ht_supported) {
1484                 struct ieee80211_ht_cap *ht_cap;
1485                 pos += (*pos) + 1;
1486                 *pos++ = WLAN_EID_HT_CAPABILITY;
1487                 *pos++ = sizeof(struct ieee80211_ht_cap);
1488                 ht_cap = (struct ieee80211_ht_cap *)pos;
1489                 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1490                 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1491                 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1492                                             IEEE80211_HT_CAP_AMPDU_FACTOR) |
1493                                             ((sband->ht_info.ampdu_density << 2) &
1494                                             IEEE80211_HT_CAP_AMPDU_DENSITY);
1495                 len += 2 + sizeof(struct ieee80211_ht_cap);
1496         }
1497 #endif  /*CONFIG_IWL4965_HT */
1498
1499  fill_end:
1500         return (u16)len;
1501 }
1502
1503 /*
1504  * QoS  support
1505 */
1506 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1507                                        struct iwl4965_qosparam_cmd *qos)
1508 {
1509
1510         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1511                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1512 }
1513
1514 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1515 {
1516         unsigned long flags;
1517
1518         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1519                 return;
1520
1521         if (!priv->qos_data.qos_enable)
1522                 return;
1523
1524         spin_lock_irqsave(&priv->lock, flags);
1525         priv->qos_data.def_qos_parm.qos_flags = 0;
1526
1527         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1528             !priv->qos_data.qos_cap.q_AP.txop_request)
1529                 priv->qos_data.def_qos_parm.qos_flags |=
1530                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1531         if (priv->qos_data.qos_active)
1532                 priv->qos_data.def_qos_parm.qos_flags |=
1533                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1534
1535 #ifdef CONFIG_IWL4965_HT
1536         if (priv->current_ht_config.is_ht)
1537                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1538 #endif /* CONFIG_IWL4965_HT */
1539
1540         spin_unlock_irqrestore(&priv->lock, flags);
1541
1542         if (force || iwl_is_associated(priv)) {
1543                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1544                                 priv->qos_data.qos_active,
1545                                 priv->qos_data.def_qos_parm.qos_flags);
1546
1547                 iwl4965_send_qos_params_command(priv,
1548                                 &(priv->qos_data.def_qos_parm));
1549         }
1550 }
1551
1552 /*
1553  * Power management (not Tx power!) functions
1554  */
1555 #define MSEC_TO_USEC 1024
1556
1557 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1558 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1559 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1560 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1561                                      __constant_cpu_to_le32(X1), \
1562                                      __constant_cpu_to_le32(X2), \
1563                                      __constant_cpu_to_le32(X3), \
1564                                      __constant_cpu_to_le32(X4)}
1565
1566
1567 /* default power management (not Tx power) table values */
1568 /* for tim  0-10 */
1569 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1570         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1571         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1572         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1573         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1574         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1575         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1576 };
1577
1578 /* for tim > 10 */
1579 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1580         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1581         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1582                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1583         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1584                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1585         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1586                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1587         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1588         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1589                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1590 };
1591
1592 int iwl4965_power_init_handle(struct iwl_priv *priv)
1593 {
1594         int rc = 0, i;
1595         struct iwl4965_power_mgr *pow_data;
1596         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1597         u16 pci_pm;
1598
1599         IWL_DEBUG_POWER("Initialize power \n");
1600
1601         pow_data = &(priv->power_data);
1602
1603         memset(pow_data, 0, sizeof(*pow_data));
1604
1605         pow_data->active_index = IWL_POWER_RANGE_0;
1606         pow_data->dtim_val = 0xffff;
1607
1608         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1609         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1610
1611         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1612         if (rc != 0)
1613                 return 0;
1614         else {
1615                 struct iwl4965_powertable_cmd *cmd;
1616
1617                 IWL_DEBUG_POWER("adjust power command flags\n");
1618
1619                 for (i = 0; i < IWL_POWER_AC; i++) {
1620                         cmd = &pow_data->pwr_range_0[i].cmd;
1621
1622                         if (pci_pm & 0x1)
1623                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1624                         else
1625                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1626                 }
1627         }
1628         return rc;
1629 }
1630
1631 static int iwl4965_update_power_cmd(struct iwl_priv *priv,
1632                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
1633 {
1634         int rc = 0, i;
1635         u8 skip;
1636         u32 max_sleep = 0;
1637         struct iwl4965_power_vec_entry *range;
1638         u8 period = 0;
1639         struct iwl4965_power_mgr *pow_data;
1640
1641         if (mode > IWL_POWER_INDEX_5) {
1642                 IWL_DEBUG_POWER("Error invalid power mode \n");
1643                 return -1;
1644         }
1645         pow_data = &(priv->power_data);
1646
1647         if (pow_data->active_index == IWL_POWER_RANGE_0)
1648                 range = &pow_data->pwr_range_0[0];
1649         else
1650                 range = &pow_data->pwr_range_1[1];
1651
1652         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1653
1654 #ifdef IWL_MAC80211_DISABLE
1655         if (priv->assoc_network != NULL) {
1656                 unsigned long flags;
1657
1658                 period = priv->assoc_network->tim.tim_period;
1659         }
1660 #endif  /*IWL_MAC80211_DISABLE */
1661         skip = range[mode].no_dtim;
1662
1663         if (period == 0) {
1664                 period = 1;
1665                 skip = 0;
1666         }
1667
1668         if (skip == 0) {
1669                 max_sleep = period;
1670                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1671         } else {
1672                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1673                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1674                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1675         }
1676
1677         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1678                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1679                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1680         }
1681
1682         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1683         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1684         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1685         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1686                         le32_to_cpu(cmd->sleep_interval[0]),
1687                         le32_to_cpu(cmd->sleep_interval[1]),
1688                         le32_to_cpu(cmd->sleep_interval[2]),
1689                         le32_to_cpu(cmd->sleep_interval[3]),
1690                         le32_to_cpu(cmd->sleep_interval[4]));
1691
1692         return rc;
1693 }
1694
1695 static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
1696 {
1697         u32 uninitialized_var(final_mode);
1698         int rc;
1699         struct iwl4965_powertable_cmd cmd;
1700
1701         /* If on battery, set to 3,
1702          * if plugged into AC power, set to CAM ("continuously aware mode"),
1703          * else user level */
1704         switch (mode) {
1705         case IWL_POWER_BATTERY:
1706                 final_mode = IWL_POWER_INDEX_3;
1707                 break;
1708         case IWL_POWER_AC:
1709                 final_mode = IWL_POWER_MODE_CAM;
1710                 break;
1711         default:
1712                 final_mode = mode;
1713                 break;
1714         }
1715
1716         cmd.keep_alive_beacons = 0;
1717
1718         iwl4965_update_power_cmd(priv, &cmd, final_mode);
1719
1720         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1721
1722         if (final_mode == IWL_POWER_MODE_CAM)
1723                 clear_bit(STATUS_POWER_PMI, &priv->status);
1724         else
1725                 set_bit(STATUS_POWER_PMI, &priv->status);
1726
1727         return rc;
1728 }
1729
1730 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1731 {
1732         /* Filter incoming packets to determine if they are targeted toward
1733          * this network, discarding packets coming from ourselves */
1734         switch (priv->iw_mode) {
1735         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1736                 /* packets from our adapter are dropped (echo) */
1737                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1738                         return 0;
1739                 /* {broad,multi}cast packets to our IBSS go through */
1740                 if (is_multicast_ether_addr(header->addr1))
1741                         return !compare_ether_addr(header->addr3, priv->bssid);
1742                 /* packets to our adapter go through */
1743                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1744         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1745                 /* packets from our adapter are dropped (echo) */
1746                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1747                         return 0;
1748                 /* {broad,multi}cast packets to our BSS go through */
1749                 if (is_multicast_ether_addr(header->addr1))
1750                         return !compare_ether_addr(header->addr2, priv->bssid);
1751                 /* packets to our adapter go through */
1752                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1753         default:
1754                 break;
1755         }
1756
1757         return 1;
1758 }
1759
1760 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1761
1762 static const char *iwl4965_get_tx_fail_reason(u32 status)
1763 {
1764         switch (status & TX_STATUS_MSK) {
1765         case TX_STATUS_SUCCESS:
1766                 return "SUCCESS";
1767                 TX_STATUS_ENTRY(SHORT_LIMIT);
1768                 TX_STATUS_ENTRY(LONG_LIMIT);
1769                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1770                 TX_STATUS_ENTRY(MGMNT_ABORT);
1771                 TX_STATUS_ENTRY(NEXT_FRAG);
1772                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1773                 TX_STATUS_ENTRY(DEST_PS);
1774                 TX_STATUS_ENTRY(ABORTED);
1775                 TX_STATUS_ENTRY(BT_RETRY);
1776                 TX_STATUS_ENTRY(STA_INVALID);
1777                 TX_STATUS_ENTRY(FRAG_DROPPED);
1778                 TX_STATUS_ENTRY(TID_DISABLE);
1779                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1780                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1781                 TX_STATUS_ENTRY(TX_LOCKED);
1782                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1783         }
1784
1785         return "UNKNOWN";
1786 }
1787
1788 /**
1789  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1790  *
1791  * NOTE: priv->mutex is not required before calling this function
1792  */
1793 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1794 {
1795         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1796                 clear_bit(STATUS_SCANNING, &priv->status);
1797                 return 0;
1798         }
1799
1800         if (test_bit(STATUS_SCANNING, &priv->status)) {
1801                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1802                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1803                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1804                         queue_work(priv->workqueue, &priv->abort_scan);
1805
1806                 } else
1807                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1808
1809                 return test_bit(STATUS_SCANNING, &priv->status);
1810         }
1811
1812         return 0;
1813 }
1814
1815 /**
1816  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1817  * @ms: amount of time to wait (in milliseconds) for scan to abort
1818  *
1819  * NOTE: priv->mutex must be held before calling this function
1820  */
1821 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1822 {
1823         unsigned long now = jiffies;
1824         int ret;
1825
1826         ret = iwl4965_scan_cancel(priv);
1827         if (ret && ms) {
1828                 mutex_unlock(&priv->mutex);
1829                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1830                                 test_bit(STATUS_SCANNING, &priv->status))
1831                         msleep(1);
1832                 mutex_lock(&priv->mutex);
1833
1834                 return test_bit(STATUS_SCANNING, &priv->status);
1835         }
1836
1837         return ret;
1838 }
1839
1840 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1841 {
1842         /* Reset ieee stats */
1843
1844         /* We don't reset the net_device_stats (ieee->stats) on
1845          * re-association */
1846
1847         priv->last_seq_num = -1;
1848         priv->last_frag_num = -1;
1849         priv->last_packet_time = 0;
1850
1851         iwl4965_scan_cancel(priv);
1852 }
1853
1854 #define MAX_UCODE_BEACON_INTERVAL       4096
1855 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1856
1857 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1858 {
1859         u16 new_val = 0;
1860         u16 beacon_factor = 0;
1861
1862         beacon_factor =
1863             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1864                 / MAX_UCODE_BEACON_INTERVAL;
1865         new_val = beacon_val / beacon_factor;
1866
1867         return cpu_to_le16(new_val);
1868 }
1869
1870 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1871 {
1872         u64 interval_tm_unit;
1873         u64 tsf, result;
1874         unsigned long flags;
1875         struct ieee80211_conf *conf = NULL;
1876         u16 beacon_int = 0;
1877
1878         conf = ieee80211_get_hw_conf(priv->hw);
1879
1880         spin_lock_irqsave(&priv->lock, flags);
1881         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1882         priv->rxon_timing.timestamp.dw[0] =
1883                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1884
1885         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1886
1887         tsf = priv->timestamp;
1888
1889         beacon_int = priv->beacon_int;
1890         spin_unlock_irqrestore(&priv->lock, flags);
1891
1892         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1893                 if (beacon_int == 0) {
1894                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1895                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1896                 } else {
1897                         priv->rxon_timing.beacon_interval =
1898                                 cpu_to_le16(beacon_int);
1899                         priv->rxon_timing.beacon_interval =
1900                             iwl4965_adjust_beacon_interval(
1901                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1902                 }
1903
1904                 priv->rxon_timing.atim_window = 0;
1905         } else {
1906                 priv->rxon_timing.beacon_interval =
1907                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1908                 /* TODO: we need to get atim_window from upper stack
1909                  * for now we set to 0 */
1910                 priv->rxon_timing.atim_window = 0;
1911         }
1912
1913         interval_tm_unit =
1914                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1915         result = do_div(tsf, interval_tm_unit);
1916         priv->rxon_timing.beacon_init_val =
1917             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1918
1919         IWL_DEBUG_ASSOC
1920             ("beacon interval %d beacon timer %d beacon tim %d\n",
1921                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1922                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1923                 le16_to_cpu(priv->rxon_timing.atim_window));
1924 }
1925
1926 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1927 {
1928         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1929                 IWL_ERROR("APs don't scan.\n");
1930                 return 0;
1931         }
1932
1933         if (!iwl_is_ready_rf(priv)) {
1934                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1935                 return -EIO;
1936         }
1937
1938         if (test_bit(STATUS_SCANNING, &priv->status)) {
1939                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1940                 return -EAGAIN;
1941         }
1942
1943         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1944                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1945                                "Queuing.\n");
1946                 return -EAGAIN;
1947         }
1948
1949         IWL_DEBUG_INFO("Starting scan...\n");
1950         priv->scan_bands = 2;
1951         set_bit(STATUS_SCANNING, &priv->status);
1952         priv->scan_start = jiffies;
1953         priv->scan_pass_start = priv->scan_start;
1954
1955         queue_work(priv->workqueue, &priv->request_scan);
1956
1957         return 0;
1958 }
1959
1960
1961 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1962                                           enum ieee80211_band band)
1963 {
1964         if (band == IEEE80211_BAND_5GHZ) {
1965                 priv->staging_rxon.flags &=
1966                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1967                       | RXON_FLG_CCK_MSK);
1968                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1969         } else {
1970                 /* Copied from iwl4965_bg_post_associate() */
1971                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1972                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1973                 else
1974                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1975
1976                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1977                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1978
1979                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1980                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1981                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1982         }
1983 }
1984
1985 /*
1986  * initialize rxon structure with default values from eeprom
1987  */
1988 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1989 {
1990         const struct iwl_channel_info *ch_info;
1991
1992         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1993
1994         switch (priv->iw_mode) {
1995         case IEEE80211_IF_TYPE_AP:
1996                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1997                 break;
1998
1999         case IEEE80211_IF_TYPE_STA:
2000                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2001                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2002                 break;
2003
2004         case IEEE80211_IF_TYPE_IBSS:
2005                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2006                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2007                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2008                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2009                 break;
2010
2011         case IEEE80211_IF_TYPE_MNTR:
2012                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2013                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2014                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2015                 break;
2016         default:
2017                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
2018                 break;
2019         }
2020
2021 #if 0
2022         /* TODO:  Figure out when short_preamble would be set and cache from
2023          * that */
2024         if (!hw_to_local(priv->hw)->short_preamble)
2025                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2026         else
2027                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2028 #endif
2029
2030         ch_info = iwl_get_channel_info(priv, priv->band,
2031                                        le16_to_cpu(priv->staging_rxon.channel));
2032
2033         if (!ch_info)
2034                 ch_info = &priv->channel_info[0];
2035
2036         /*
2037          * in some case A channels are all non IBSS
2038          * in this case force B/G channel
2039          */
2040         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2041             !(is_channel_ibss(ch_info)))
2042                 ch_info = &priv->channel_info[0];
2043
2044         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2045         priv->band = ch_info->band;
2046
2047         iwl4965_set_flags_for_phymode(priv, priv->band);
2048
2049         priv->staging_rxon.ofdm_basic_rates =
2050             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2051         priv->staging_rxon.cck_basic_rates =
2052             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2053
2054         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2055                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2056         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2057         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2058         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2059         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2060         iwl4965_set_rxon_chain(priv);
2061 }
2062
2063 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
2064 {
2065         if (mode == IEEE80211_IF_TYPE_IBSS) {
2066                 const struct iwl_channel_info *ch_info;
2067
2068                 ch_info = iwl_get_channel_info(priv,
2069                         priv->band,
2070                         le16_to_cpu(priv->staging_rxon.channel));
2071
2072                 if (!ch_info || !is_channel_ibss(ch_info)) {
2073                         IWL_ERROR("channel %d not IBSS channel\n",
2074                                   le16_to_cpu(priv->staging_rxon.channel));
2075                         return -EINVAL;
2076                 }
2077         }
2078
2079         priv->iw_mode = mode;
2080
2081         iwl4965_connection_init_rx_config(priv);
2082         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2083
2084         iwlcore_clear_stations_table(priv);
2085
2086         /* dont commit rxon if rf-kill is on*/
2087         if (!iwl_is_ready_rf(priv))
2088                 return -EAGAIN;
2089
2090         cancel_delayed_work(&priv->scan_check);
2091         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2092                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2093                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2094                 return -EAGAIN;
2095         }
2096
2097         iwl4965_commit_rxon(priv);
2098
2099         return 0;
2100 }
2101
2102 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2103                                       struct ieee80211_tx_control *ctl,
2104                                       struct iwl_cmd *cmd,
2105                                       struct sk_buff *skb_frag,
2106                                       int sta_id)
2107 {
2108         struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
2109         struct iwl_wep_key *wepkey;
2110         int keyidx = 0;
2111
2112         BUG_ON(ctl->key_idx > 3);
2113
2114         switch (keyinfo->alg) {
2115         case ALG_CCMP:
2116                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2117                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2118                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2119                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
2120                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2121                 break;
2122
2123         case ALG_TKIP:
2124                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2125                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
2126                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
2127                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
2128                 break;
2129
2130         case ALG_WEP:
2131                 wepkey = &priv->wep_keys[ctl->key_idx];
2132                 cmd->cmd.tx.sec_ctl = 0;
2133                 if (priv->default_wep_key) {
2134                         /* the WEP key was sent as static */
2135                         keyidx = ctl->key_idx;
2136                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
2137                                                         wepkey->key_size);
2138                         if (wepkey->key_size == WEP_KEY_LEN_128)
2139                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2140                 } else {
2141                         IWL_ERROR("No support for WEP key mappings key\n");
2142                 }
2143
2144                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
2145                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
2146
2147                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2148                              "with key %d\n", keyidx);
2149                 break;
2150
2151         default:
2152                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2153                 break;
2154         }
2155 }
2156
2157 /*
2158  * handle build REPLY_TX command notification.
2159  */
2160 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
2161                                   struct iwl_cmd *cmd,
2162                                   struct ieee80211_tx_control *ctrl,
2163                                   struct ieee80211_hdr *hdr,
2164                                   int is_unicast, u8 std_id)
2165 {
2166         __le16 *qc;
2167         u16 fc = le16_to_cpu(hdr->frame_control);
2168         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2169
2170         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2171         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2172                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2173                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2174                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2175                 if (ieee80211_is_probe_response(fc) &&
2176                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2177                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2178         } else {
2179                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2180                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2181         }
2182
2183         if (ieee80211_is_back_request(fc))
2184                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2185
2186
2187         cmd->cmd.tx.sta_id = std_id;
2188         if (ieee80211_get_morefrag(hdr))
2189                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2190
2191         qc = ieee80211_get_qos_ctrl(hdr);
2192         if (qc) {
2193                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2194                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2195         } else
2196                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2197
2198         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2199                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2200                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2201         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2202                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2203                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2204         }
2205
2206         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2207                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2208
2209         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2210         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2211                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2212                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2213                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2214                 else
2215                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2216         } else {
2217                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2218         }
2219
2220         cmd->cmd.tx.driver_txop = 0;
2221         cmd->cmd.tx.tx_flags = tx_flags;
2222         cmd->cmd.tx.next_frame_len = 0;
2223 }
2224 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2225 {
2226         /* 0 - mgmt, 1 - cnt, 2 - data */
2227         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2228         priv->tx_stats[idx].cnt++;
2229         priv->tx_stats[idx].bytes += len;
2230 }
2231 /**
2232  * iwl4965_get_sta_id - Find station's index within station table
2233  *
2234  * If new IBSS station, create new entry in station table
2235  */
2236 static int iwl4965_get_sta_id(struct iwl_priv *priv,
2237                                 struct ieee80211_hdr *hdr)
2238 {
2239         int sta_id;
2240         u16 fc = le16_to_cpu(hdr->frame_control);
2241         DECLARE_MAC_BUF(mac);
2242
2243         /* If this frame is broadcast or management, use broadcast station id */
2244         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2245             is_multicast_ether_addr(hdr->addr1))
2246                 return priv->hw_setting.bcast_sta_id;
2247
2248         switch (priv->iw_mode) {
2249
2250         /* If we are a client station in a BSS network, use the special
2251          * AP station entry (that's the only station we communicate with) */
2252         case IEEE80211_IF_TYPE_STA:
2253                 return IWL_AP_ID;
2254
2255         /* If we are an AP, then find the station, or use BCAST */
2256         case IEEE80211_IF_TYPE_AP:
2257                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2258                 if (sta_id != IWL_INVALID_STATION)
2259                         return sta_id;
2260                 return priv->hw_setting.bcast_sta_id;
2261
2262         /* If this frame is going out to an IBSS network, find the station,
2263          * or create a new station table entry */
2264         case IEEE80211_IF_TYPE_IBSS:
2265                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2266                 if (sta_id != IWL_INVALID_STATION)
2267                         return sta_id;
2268
2269                 /* Create new station table entry */
2270                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2271                                                    0, CMD_ASYNC, NULL);
2272
2273                 if (sta_id != IWL_INVALID_STATION)
2274                         return sta_id;
2275
2276                 IWL_DEBUG_DROP("Station %s not in station map. "
2277                                "Defaulting to broadcast...\n",
2278                                print_mac(mac, hdr->addr1));
2279                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2280                 return priv->hw_setting.bcast_sta_id;
2281
2282         default:
2283                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2284                 return priv->hw_setting.bcast_sta_id;
2285         }
2286 }
2287
2288 /*
2289  * start REPLY_TX command process
2290  */
2291 static int iwl4965_tx_skb(struct iwl_priv *priv,
2292                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2293 {
2294         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2295         struct iwl4965_tfd_frame *tfd;
2296         u32 *control_flags;
2297         int txq_id = ctl->queue;
2298         struct iwl4965_tx_queue *txq = NULL;
2299         struct iwl4965_queue *q = NULL;
2300         dma_addr_t phys_addr;
2301         dma_addr_t txcmd_phys;
2302         dma_addr_t scratch_phys;
2303         struct iwl_cmd *out_cmd = NULL;
2304         u16 len, idx, len_org;
2305         u8 id, hdr_len, unicast;
2306         u8 sta_id;
2307         u16 seq_number = 0;
2308         u16 fc;
2309         __le16 *qc;
2310         u8 wait_write_ptr = 0;
2311         unsigned long flags;
2312         int rc;
2313
2314         spin_lock_irqsave(&priv->lock, flags);
2315         if (iwl_is_rfkill(priv)) {
2316                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2317                 goto drop_unlock;
2318         }
2319
2320         if (!priv->vif) {
2321                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2322                 goto drop_unlock;
2323         }
2324
2325         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2326                 IWL_ERROR("ERROR: No TX rate available.\n");
2327                 goto drop_unlock;
2328         }
2329
2330         unicast = !is_multicast_ether_addr(hdr->addr1);
2331         id = 0;
2332
2333         fc = le16_to_cpu(hdr->frame_control);
2334
2335 #ifdef CONFIG_IWLWIFI_DEBUG
2336         if (ieee80211_is_auth(fc))
2337                 IWL_DEBUG_TX("Sending AUTH frame\n");
2338         else if (ieee80211_is_assoc_request(fc))
2339                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2340         else if (ieee80211_is_reassoc_request(fc))
2341                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2342 #endif
2343
2344         /* drop all data frame if we are not associated */
2345         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2346            (!iwl_is_associated(priv) ||
2347             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2348             !priv->assoc_station_added)) {
2349                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2350                 goto drop_unlock;
2351         }
2352
2353         spin_unlock_irqrestore(&priv->lock, flags);
2354
2355         hdr_len = ieee80211_get_hdrlen(fc);
2356
2357         /* Find (or create) index into station table for destination station */
2358         sta_id = iwl4965_get_sta_id(priv, hdr);
2359         if (sta_id == IWL_INVALID_STATION) {
2360                 DECLARE_MAC_BUF(mac);
2361
2362                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2363                                print_mac(mac, hdr->addr1));
2364                 goto drop;
2365         }
2366
2367         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2368
2369         qc = ieee80211_get_qos_ctrl(hdr);
2370         if (qc) {
2371                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2372                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2373                                 IEEE80211_SCTL_SEQ;
2374                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2375                         (hdr->seq_ctrl &
2376                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2377                 seq_number += 0x10;
2378 #ifdef CONFIG_IWL4965_HT
2379                 /* aggregation is on for this <sta,tid> */
2380                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2381                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2382                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2383 #endif /* CONFIG_IWL4965_HT */
2384         }
2385
2386         /* Descriptor for chosen Tx queue */
2387         txq = &priv->txq[txq_id];
2388         q = &txq->q;
2389
2390         spin_lock_irqsave(&priv->lock, flags);
2391
2392         /* Set up first empty TFD within this queue's circular TFD buffer */
2393         tfd = &txq->bd[q->write_ptr];
2394         memset(tfd, 0, sizeof(*tfd));
2395         control_flags = (u32 *) tfd;
2396         idx = get_cmd_index(q, q->write_ptr, 0);
2397
2398         /* Set up driver data for this TFD */
2399         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2400         txq->txb[q->write_ptr].skb[0] = skb;
2401         memcpy(&(txq->txb[q->write_ptr].status.control),
2402                ctl, sizeof(struct ieee80211_tx_control));
2403
2404         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2405         out_cmd = &txq->cmd[idx];
2406         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2407         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2408
2409         /*
2410          * Set up the Tx-command (not MAC!) header.
2411          * Store the chosen Tx queue and TFD index within the sequence field;
2412          * after Tx, uCode's Tx response will return this value so driver can
2413          * locate the frame within the tx queue and do post-tx processing.
2414          */
2415         out_cmd->hdr.cmd = REPLY_TX;
2416         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2417                                 INDEX_TO_SEQ(q->write_ptr)));
2418
2419         /* Copy MAC header from skb into command buffer */
2420         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2421
2422         /*
2423          * Use the first empty entry in this queue's command buffer array
2424          * to contain the Tx command and MAC header concatenated together
2425          * (payload data will be in another buffer).
2426          * Size of this varies, due to varying MAC header length.
2427          * If end is not dword aligned, we'll have 2 extra bytes at the end
2428          * of the MAC header (device reads on dword boundaries).
2429          * We'll tell device about this padding later.
2430          */
2431         len = priv->hw_setting.tx_cmd_len +
2432                 sizeof(struct iwl_cmd_header) + hdr_len;
2433
2434         len_org = len;
2435         len = (len + 3) & ~3;
2436
2437         if (len_org != len)
2438                 len_org = 1;
2439         else
2440                 len_org = 0;
2441
2442         /* Physical address of this Tx command's header (not MAC header!),
2443          * within command buffer array. */
2444         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2445                      offsetof(struct iwl_cmd, hdr);
2446
2447         /* Add buffer containing Tx command and MAC(!) header to TFD's
2448          * first entry */
2449         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2450
2451         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2452                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2453
2454         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2455          * if any (802.11 null frames have no payload). */
2456         len = skb->len - hdr_len;
2457         if (len) {
2458                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2459                                            len, PCI_DMA_TODEVICE);
2460                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2461         }
2462
2463         /* Tell 4965 about any 2-byte padding after MAC header */
2464         if (len_org)
2465                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2466
2467         /* Total # bytes to be transmitted */
2468         len = (u16)skb->len;
2469         out_cmd->cmd.tx.len = cpu_to_le16(len);
2470
2471         /* TODO need this for burst mode later on */
2472         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2473
2474         /* set is_hcca to 0; it probably will never be implemented */
2475         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2476
2477         iwl_update_tx_stats(priv, fc, len);
2478
2479         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2480                 offsetof(struct iwl4965_tx_cmd, scratch);
2481         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2482         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2483
2484         if (!ieee80211_get_morefrag(hdr)) {
2485                 txq->need_update = 1;
2486                 if (qc) {
2487                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2488                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2489                 }
2490         } else {
2491                 wait_write_ptr = 1;
2492                 txq->need_update = 0;
2493         }
2494
2495         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2496                            sizeof(out_cmd->cmd.tx));
2497
2498         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2499                            ieee80211_get_hdrlen(fc));
2500
2501         /* Set up entry for this TFD in Tx byte-count array */
2502         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2503
2504         /* Tell device the write index *just past* this latest filled TFD */
2505         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2506         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2507         spin_unlock_irqrestore(&priv->lock, flags);
2508
2509         if (rc)
2510                 return rc;
2511
2512         if ((iwl4965_queue_space(q) < q->high_mark)
2513             && priv->mac80211_registered) {
2514                 if (wait_write_ptr) {
2515                         spin_lock_irqsave(&priv->lock, flags);
2516                         txq->need_update = 1;
2517                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2518                         spin_unlock_irqrestore(&priv->lock, flags);
2519                 }
2520
2521                 ieee80211_stop_queue(priv->hw, ctl->queue);
2522         }
2523
2524         return 0;
2525
2526 drop_unlock:
2527         spin_unlock_irqrestore(&priv->lock, flags);
2528 drop:
2529         return -1;
2530 }
2531
2532 static void iwl4965_set_rate(struct iwl_priv *priv)
2533 {
2534         const struct ieee80211_supported_band *hw = NULL;
2535         struct ieee80211_rate *rate;
2536         int i;
2537
2538         hw = iwl4965_get_hw_mode(priv, priv->band);
2539         if (!hw) {
2540                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2541                 return;
2542         }
2543
2544         priv->active_rate = 0;
2545         priv->active_rate_basic = 0;
2546
2547         for (i = 0; i < hw->n_bitrates; i++) {
2548                 rate = &(hw->bitrates[i]);
2549                 if (rate->hw_value < IWL_RATE_COUNT)
2550                         priv->active_rate |= (1 << rate->hw_value);
2551         }
2552
2553         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2554                        priv->active_rate, priv->active_rate_basic);
2555
2556         /*
2557          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2558          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2559          * OFDM
2560          */
2561         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2562                 priv->staging_rxon.cck_basic_rates =
2563                     ((priv->active_rate_basic &
2564                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2565         else
2566                 priv->staging_rxon.cck_basic_rates =
2567                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2568
2569         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2570                 priv->staging_rxon.ofdm_basic_rates =
2571                     ((priv->active_rate_basic &
2572                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2573                       IWL_FIRST_OFDM_RATE) & 0xFF;
2574         else
2575                 priv->staging_rxon.ofdm_basic_rates =
2576                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2577 }
2578
2579 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2580 {
2581         unsigned long flags;
2582
2583         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2584                 return;
2585
2586         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2587                           disable_radio ? "OFF" : "ON");
2588
2589         if (disable_radio) {
2590                 iwl4965_scan_cancel(priv);
2591                 /* FIXME: This is a workaround for AP */
2592                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2593                         spin_lock_irqsave(&priv->lock, flags);
2594                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2595                                     CSR_UCODE_SW_BIT_RFKILL);
2596                         spin_unlock_irqrestore(&priv->lock, flags);
2597                         /* call the host command only if no hw rf-kill set */
2598                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2599                                 iwl4965_send_card_state(priv,
2600                                                         CARD_STATE_CMD_DISABLE,
2601                                                         0);
2602                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2603
2604                         /* make sure mac80211 stop sending Tx frame */
2605                         if (priv->mac80211_registered)
2606                                 ieee80211_stop_queues(priv->hw);
2607                 }
2608                 return;
2609         }
2610
2611         spin_lock_irqsave(&priv->lock, flags);
2612         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2613
2614         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2615         spin_unlock_irqrestore(&priv->lock, flags);
2616
2617         /* wake up ucode */
2618         msleep(10);
2619
2620         spin_lock_irqsave(&priv->lock, flags);
2621         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2622         if (!iwl_grab_nic_access(priv))
2623                 iwl_release_nic_access(priv);
2624         spin_unlock_irqrestore(&priv->lock, flags);
2625
2626         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2627                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2628                                   "disabled by HW switch\n");
2629                 return;
2630         }
2631
2632         queue_work(priv->workqueue, &priv->restart);
2633         return;
2634 }
2635
2636 void iwl4965_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2637                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2638 {
2639         u16 fc =
2640             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2641
2642         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2643                 return;
2644
2645         if (!(fc & IEEE80211_FCTL_PROTECTED))
2646                 return;
2647
2648         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2649         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2650         case RX_RES_STATUS_SEC_TYPE_TKIP:
2651                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2652                  * Decryption will be done in SW. */
2653                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2654                     RX_RES_STATUS_BAD_KEY_TTAK)
2655                         break;
2656
2657                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2658                     RX_RES_STATUS_BAD_ICV_MIC)
2659                         stats->flag |= RX_FLAG_MMIC_ERROR;
2660         case RX_RES_STATUS_SEC_TYPE_WEP:
2661         case RX_RES_STATUS_SEC_TYPE_CCMP:
2662                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2663                     RX_RES_STATUS_DECRYPT_OK) {
2664                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2665                         stats->flag |= RX_FLAG_DECRYPTED;
2666                 }
2667                 break;
2668
2669         default:
2670                 break;
2671         }
2672 }
2673
2674
2675 #define IWL_PACKET_RETRY_TIME HZ
2676
2677 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2678 {
2679         u16 sc = le16_to_cpu(header->seq_ctrl);
2680         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2681         u16 frag = sc & IEEE80211_SCTL_FRAG;
2682         u16 *last_seq, *last_frag;
2683         unsigned long *last_time;
2684
2685         switch (priv->iw_mode) {
2686         case IEEE80211_IF_TYPE_IBSS:{
2687                 struct list_head *p;
2688                 struct iwl4965_ibss_seq *entry = NULL;
2689                 u8 *mac = header->addr2;
2690                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2691
2692                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2693                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2694                         if (!compare_ether_addr(entry->mac, mac))
2695                                 break;
2696                 }
2697                 if (p == &priv->ibss_mac_hash[index]) {
2698                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2699                         if (!entry) {
2700                                 IWL_ERROR("Cannot malloc new mac entry\n");
2701                                 return 0;
2702                         }
2703                         memcpy(entry->mac, mac, ETH_ALEN);
2704                         entry->seq_num = seq;
2705                         entry->frag_num = frag;
2706                         entry->packet_time = jiffies;
2707                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2708                         return 0;
2709                 }
2710                 last_seq = &entry->seq_num;
2711                 last_frag = &entry->frag_num;
2712                 last_time = &entry->packet_time;
2713                 break;
2714         }
2715         case IEEE80211_IF_TYPE_STA:
2716                 last_seq = &priv->last_seq_num;
2717                 last_frag = &priv->last_frag_num;
2718                 last_time = &priv->last_packet_time;
2719                 break;
2720         default:
2721                 return 0;
2722         }
2723         if ((*last_seq == seq) &&
2724             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2725                 if (*last_frag == frag)
2726                         goto drop;
2727                 if (*last_frag + 1 != frag)
2728                         /* out-of-order fragment */
2729                         goto drop;
2730         } else
2731                 *last_seq = seq;
2732
2733         *last_frag = frag;
2734         *last_time = jiffies;
2735         return 0;
2736
2737  drop:
2738         return 1;
2739 }
2740
2741 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2742
2743 #include "iwl-spectrum.h"
2744
2745 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2746 #define BEACON_TIME_MASK_HIGH   0xFF000000
2747 #define TIME_UNIT               1024
2748
2749 /*
2750  * extended beacon time format
2751  * time in usec will be changed into a 32-bit value in 8:24 format
2752  * the high 1 byte is the beacon counts
2753  * the lower 3 bytes is the time in usec within one beacon interval
2754  */
2755
2756 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2757 {
2758         u32 quot;
2759         u32 rem;
2760         u32 interval = beacon_interval * 1024;
2761
2762         if (!interval || !usec)
2763                 return 0;
2764
2765         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2766         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2767
2768         return (quot << 24) + rem;
2769 }
2770
2771 /* base is usually what we get from ucode with each received frame,
2772  * the same as HW timer counter counting down
2773  */
2774
2775 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2776 {
2777         u32 base_low = base & BEACON_TIME_MASK_LOW;
2778         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2779         u32 interval = beacon_interval * TIME_UNIT;
2780         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2781             (addon & BEACON_TIME_MASK_HIGH);
2782
2783         if (base_low > addon_low)
2784                 res += base_low - addon_low;
2785         else if (base_low < addon_low) {
2786                 res += interval + base_low - addon_low;
2787                 res += (1 << 24);
2788         } else
2789                 res += (1 << 24);
2790
2791         return cpu_to_le32(res);
2792 }
2793
2794 static int iwl4965_get_measurement(struct iwl_priv *priv,
2795                                struct ieee80211_measurement_params *params,
2796                                u8 type)
2797 {
2798         struct iwl4965_spectrum_cmd spectrum;
2799         struct iwl4965_rx_packet *res;
2800         struct iwl_host_cmd cmd = {
2801                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2802                 .data = (void *)&spectrum,
2803                 .meta.flags = CMD_WANT_SKB,
2804         };
2805         u32 add_time = le64_to_cpu(params->start_time);
2806         int rc;
2807         int spectrum_resp_status;
2808         int duration = le16_to_cpu(params->duration);
2809
2810         if (iwl_is_associated(priv))
2811                 add_time =
2812                     iwl4965_usecs_to_beacons(
2813                         le64_to_cpu(params->start_time) - priv->last_tsf,
2814                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2815
2816         memset(&spectrum, 0, sizeof(spectrum));
2817
2818         spectrum.channel_count = cpu_to_le16(1);
2819         spectrum.flags =
2820             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2821         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2822         cmd.len = sizeof(spectrum);
2823         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2824
2825         if (iwl_is_associated(priv))
2826                 spectrum.start_time =
2827                     iwl4965_add_beacon_time(priv->last_beacon_time,
2828                                 add_time,
2829                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2830         else
2831                 spectrum.start_time = 0;
2832
2833         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2834         spectrum.channels[0].channel = params->channel;
2835         spectrum.channels[0].type = type;
2836         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2837                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2838                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2839
2840         rc = iwl_send_cmd_sync(priv, &cmd);
2841         if (rc)
2842                 return rc;
2843
2844         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2845         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2846                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2847                 rc = -EIO;
2848         }
2849
2850         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2851         switch (spectrum_resp_status) {
2852         case 0:         /* Command will be handled */
2853                 if (res->u.spectrum.id != 0xff) {
2854                         IWL_DEBUG_INFO
2855                             ("Replaced existing measurement: %d\n",
2856                              res->u.spectrum.id);
2857                         priv->measurement_status &= ~MEASUREMENT_READY;
2858                 }
2859                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2860                 rc = 0;
2861                 break;
2862
2863         case 1:         /* Command will not be handled */
2864                 rc = -EAGAIN;
2865                 break;
2866         }
2867
2868         dev_kfree_skb_any(cmd.meta.u.skb);
2869
2870         return rc;
2871 }
2872 #endif
2873
2874 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2875                                  struct iwl4965_tx_info *tx_sta)
2876 {
2877
2878         tx_sta->status.ack_signal = 0;
2879         tx_sta->status.excessive_retries = 0;
2880         tx_sta->status.queue_length = 0;
2881         tx_sta->status.queue_number = 0;
2882
2883         if (in_interrupt())
2884                 ieee80211_tx_status_irqsafe(priv->hw,
2885                                             tx_sta->skb[0], &(tx_sta->status));
2886         else
2887                 ieee80211_tx_status(priv->hw,
2888                                     tx_sta->skb[0], &(tx_sta->status));
2889
2890         tx_sta->skb[0] = NULL;
2891 }
2892
2893 /**
2894  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2895  *
2896  * When FW advances 'R' index, all entries between old and new 'R' index
2897  * need to be reclaimed. As result, some free space forms.  If there is
2898  * enough free space (> low mark), wake the stack that feeds us.
2899  */
2900 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2901 {
2902         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2903         struct iwl4965_queue *q = &txq->q;
2904         int nfreed = 0;
2905
2906         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2907                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2908                           "is out of range [0-%d] %d %d.\n", txq_id,
2909                           index, q->n_bd, q->write_ptr, q->read_ptr);
2910                 return 0;
2911         }
2912
2913         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2914                 q->read_ptr != index;
2915                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2916                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2917                         iwl4965_txstatus_to_ieee(priv,
2918                                         &(txq->txb[txq->q.read_ptr]));
2919                         iwl4965_hw_txq_free_tfd(priv, txq);
2920                 } else if (nfreed > 1) {
2921                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2922                                         q->write_ptr, q->read_ptr);
2923                         queue_work(priv->workqueue, &priv->restart);
2924                 }
2925                 nfreed++;
2926         }
2927
2928 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2929                         (txq_id != IWL_CMD_QUEUE_NUM) &&
2930                         priv->mac80211_registered)
2931                 ieee80211_wake_queue(priv->hw, txq_id); */
2932
2933
2934         return nfreed;
2935 }
2936
2937 static int iwl4965_is_tx_success(u32 status)
2938 {
2939         status &= TX_STATUS_MSK;
2940         return (status == TX_STATUS_SUCCESS)
2941             || (status == TX_STATUS_DIRECT_DONE);
2942 }
2943
2944 /******************************************************************************
2945  *
2946  * Generic RX handler implementations
2947  *
2948  ******************************************************************************/
2949 #ifdef CONFIG_IWL4965_HT
2950
2951 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2952                                     struct ieee80211_hdr *hdr)
2953 {
2954         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2955                 return IWL_AP_ID;
2956         else {
2957                 u8 *da = ieee80211_get_DA(hdr);
2958                 return iwl4965_hw_find_station(priv, da);
2959         }
2960 }
2961
2962 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2963         struct iwl_priv *priv, int txq_id, int idx)
2964 {
2965         if (priv->txq[txq_id].txb[idx].skb[0])
2966                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2967                                 txb[idx].skb[0]->data;
2968         return NULL;
2969 }
2970
2971 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2972 {
2973         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2974                                 tx_resp->frame_count);
2975         return le32_to_cpu(*scd_ssn) & MAX_SN;
2976
2977 }
2978
2979 /**
2980  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2981  */
2982 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2983                                       struct iwl4965_ht_agg *agg,
2984                                       struct iwl4965_tx_resp_agg *tx_resp,
2985                                       u16 start_idx)
2986 {
2987         u16 status;
2988         struct agg_tx_status *frame_status = &tx_resp->status;
2989         struct ieee80211_tx_status *tx_status = NULL;
2990         struct ieee80211_hdr *hdr = NULL;
2991         int i, sh;
2992         int txq_id, idx;
2993         u16 seq;
2994
2995         if (agg->wait_for_ba)
2996                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2997
2998         agg->frame_count = tx_resp->frame_count;
2999         agg->start_idx = start_idx;
3000         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3001         agg->bitmap = 0;
3002
3003         /* # frames attempted by Tx command */
3004         if (agg->frame_count == 1) {
3005                 /* Only one frame was attempted; no block-ack will arrive */
3006                 status = le16_to_cpu(frame_status[0].status);
3007                 seq  = le16_to_cpu(frame_status[0].sequence);
3008                 idx = SEQ_TO_INDEX(seq);
3009                 txq_id = SEQ_TO_QUEUE(seq);
3010
3011                 /* FIXME: code repetition */
3012                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3013                                    agg->frame_count, agg->start_idx, idx);
3014
3015                 tx_status = &(priv->txq[txq_id].txb[idx].status);
3016                 tx_status->retry_count = tx_resp->failure_frame;
3017                 tx_status->queue_number = status & 0xff;
3018                 tx_status->queue_length = tx_resp->failure_rts;
3019                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
3020                 tx_status->flags = iwl4965_is_tx_success(status)?
3021                         IEEE80211_TX_STATUS_ACK : 0;
3022                 iwl4965_hwrate_to_tx_control(priv,
3023                                              le32_to_cpu(tx_resp->rate_n_flags),
3024                                              &tx_status->control);
3025                 /* FIXME: code repetition end */
3026
3027                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3028                                     status & 0xff, tx_resp->failure_frame);
3029                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3030                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3031
3032                 agg->wait_for_ba = 0;
3033         } else {
3034                 /* Two or more frames were attempted; expect block-ack */
3035                 u64 bitmap = 0;
3036                 int start = agg->start_idx;
3037
3038                 /* Construct bit-map of pending frames within Tx window */
3039                 for (i = 0; i < agg->frame_count; i++) {
3040                         u16 sc;
3041                         status = le16_to_cpu(frame_status[i].status);
3042                         seq  = le16_to_cpu(frame_status[i].sequence);
3043                         idx = SEQ_TO_INDEX(seq);
3044                         txq_id = SEQ_TO_QUEUE(seq);
3045
3046                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3047                                       AGG_TX_STATE_ABORT_MSK))
3048                                 continue;
3049
3050                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3051                                            agg->frame_count, txq_id, idx);
3052
3053                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3054
3055                         sc = le16_to_cpu(hdr->seq_ctrl);
3056                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3057                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3058                                           " idx=%d, seq_idx=%d, seq=%d\n",
3059                                           idx, SEQ_TO_SN(sc),
3060                                           hdr->seq_ctrl);
3061                                 return -1;
3062                         }
3063
3064                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3065                                            i, idx, SEQ_TO_SN(sc));
3066
3067                         sh = idx - start;
3068                         if (sh > 64) {
3069                                 sh = (start - idx) + 0xff;
3070                                 bitmap = bitmap << sh;
3071                                 sh = 0;
3072                                 start = idx;
3073                         } else if (sh < -64)
3074                                 sh  = 0xff - (start - idx);
3075                         else if (sh < 0) {
3076                                 sh = start - idx;
3077                                 start = idx;
3078                                 bitmap = bitmap << sh;
3079                                 sh = 0;
3080                         }
3081                         bitmap |= (1 << sh);
3082                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3083                                            start, (u32)(bitmap & 0xFFFFFFFF));
3084                 }
3085
3086                 agg->bitmap = bitmap;
3087                 agg->start_idx = start;
3088                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3089                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3090                                    agg->frame_count, agg->start_idx,
3091                                    (unsigned long long)agg->bitmap);
3092
3093                 if (bitmap)
3094                         agg->wait_for_ba = 1;
3095         }
3096         return 0;
3097 }
3098 #endif
3099
3100 /**
3101  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3102  */
3103 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
3104                             struct iwl4965_rx_mem_buffer *rxb)
3105 {
3106         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3107         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3108         int txq_id = SEQ_TO_QUEUE(sequence);
3109         int index = SEQ_TO_INDEX(sequence);
3110         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3111         struct ieee80211_tx_status *tx_status;
3112         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3113         u32  status = le32_to_cpu(tx_resp->status);
3114 #ifdef CONFIG_IWL4965_HT
3115         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3116         struct ieee80211_hdr *hdr;
3117         __le16 *qc;
3118 #endif
3119
3120         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3121                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3122                           "is out of range [0-%d] %d %d\n", txq_id,
3123                           index, txq->q.n_bd, txq->q.write_ptr,
3124                           txq->q.read_ptr);
3125                 return;
3126         }
3127
3128 #ifdef CONFIG_IWL4965_HT
3129         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3130         qc = ieee80211_get_qos_ctrl(hdr);
3131
3132         if (qc)
3133                 tid = le16_to_cpu(*qc) & 0xf;
3134
3135         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3136         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3137                 IWL_ERROR("Station not known\n");
3138                 return;
3139         }
3140
3141         if (txq->sched_retry) {
3142                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3143                 struct iwl4965_ht_agg *agg = NULL;
3144
3145                 if (!qc)
3146                         return;
3147
3148                 agg = &priv->stations[sta_id].tid[tid].agg;
3149
3150                 iwl4965_tx_status_reply_tx(priv, agg,
3151                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3152
3153                 if ((tx_resp->frame_count == 1) &&
3154                     !iwl4965_is_tx_success(status)) {
3155                         /* TODO: send BAR */
3156                 }
3157
3158                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3159                         int freed;
3160                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3161                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3162                                            "%d index %d\n", scd_ssn , index);
3163                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3164                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3165
3166                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3167                             txq_id >= 0 && priv->mac80211_registered &&
3168                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3169                                 ieee80211_wake_queue(priv->hw, txq_id);
3170
3171                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3172                 }
3173         } else {
3174 #endif /* CONFIG_IWL4965_HT */
3175         tx_status = &(txq->txb[txq->q.read_ptr].status);
3176
3177         tx_status->retry_count = tx_resp->failure_frame;
3178         tx_status->queue_number = status;
3179         tx_status->queue_length = tx_resp->bt_kill_count;
3180         tx_status->queue_length |= tx_resp->failure_rts;
3181         tx_status->flags =
3182             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3183         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3184                                      &tx_status->control);
3185
3186         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3187                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3188                      status, le32_to_cpu(tx_resp->rate_n_flags),
3189                      tx_resp->failure_frame);
3190
3191         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3192         if (index != -1) {
3193                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3194 #ifdef CONFIG_IWL4965_HT
3195                 if (tid != MAX_TID_COUNT)
3196                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3197                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3198                         (txq_id >= 0) &&
3199                         priv->mac80211_registered)
3200                         ieee80211_wake_queue(priv->hw, txq_id);
3201                 if (tid != MAX_TID_COUNT)
3202                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3203 #endif
3204         }
3205 #ifdef CONFIG_IWL4965_HT
3206         }
3207 #endif /* CONFIG_IWL4965_HT */
3208
3209         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3210                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3211 }
3212
3213
3214 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
3215                                struct iwl4965_rx_mem_buffer *rxb)
3216 {
3217         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3218         struct iwl4965_alive_resp *palive;
3219         struct delayed_work *pwork;
3220
3221         palive = &pkt->u.alive_frame;
3222
3223         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3224                        "0x%01X 0x%01X\n",
3225                        palive->is_valid, palive->ver_type,
3226                        palive->ver_subtype);
3227
3228         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3229                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3230                 memcpy(&priv->card_alive_init,
3231                        &pkt->u.alive_frame,
3232                        sizeof(struct iwl4965_init_alive_resp));
3233                 pwork = &priv->init_alive_start;
3234         } else {
3235                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3236                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3237                        sizeof(struct iwl4965_alive_resp));
3238                 pwork = &priv->alive_start;
3239         }
3240
3241         /* We delay the ALIVE response by 5ms to
3242          * give the HW RF Kill time to activate... */
3243         if (palive->is_valid == UCODE_VALID_OK)
3244                 queue_delayed_work(priv->workqueue, pwork,
3245                                    msecs_to_jiffies(5));
3246         else
3247                 IWL_WARNING("uCode did not respond OK.\n");
3248 }
3249
3250 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
3251                                  struct iwl4965_rx_mem_buffer *rxb)
3252 {
3253         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3254
3255         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3256         return;
3257 }
3258
3259 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
3260                                struct iwl4965_rx_mem_buffer *rxb)
3261 {
3262         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3263
3264         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3265                 "seq 0x%04X ser 0x%08X\n",
3266                 le32_to_cpu(pkt->u.err_resp.error_type),
3267                 get_cmd_string(pkt->u.err_resp.cmd_id),
3268                 pkt->u.err_resp.cmd_id,
3269                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3270                 le32_to_cpu(pkt->u.err_resp.error_info));
3271 }
3272
3273 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3274
3275 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3276 {
3277         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3278         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3279         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3280         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3281                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3282         rxon->channel = csa->channel;
3283         priv->staging_rxon.channel = csa->channel;
3284 }
3285
3286 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
3287                                           struct iwl4965_rx_mem_buffer *rxb)
3288 {
3289 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3290         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3291         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3292
3293         if (!report->state) {
3294                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3295                           "Spectrum Measure Notification: Start\n");
3296                 return;
3297         }
3298
3299         memcpy(&priv->measure_report, report, sizeof(*report));
3300         priv->measurement_status |= MEASUREMENT_READY;
3301 #endif
3302 }
3303
3304 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
3305                                   struct iwl4965_rx_mem_buffer *rxb)
3306 {
3307 #ifdef CONFIG_IWLWIFI_DEBUG
3308         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3309         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3310         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3311                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3312 #endif
3313 }
3314
3315 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3316                                              struct iwl4965_rx_mem_buffer *rxb)
3317 {
3318         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3319         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3320                         "notification for %s:\n",
3321                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3322         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3323 }
3324
3325 static void iwl4965_bg_beacon_update(struct work_struct *work)
3326 {
3327         struct iwl_priv *priv =
3328                 container_of(work, struct iwl_priv, beacon_update);
3329         struct sk_buff *beacon;
3330
3331         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3332         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3333
3334         if (!beacon) {
3335                 IWL_ERROR("update beacon failed\n");
3336                 return;
3337         }
3338
3339         mutex_lock(&priv->mutex);
3340         /* new beacon skb is allocated every time; dispose previous.*/
3341         if (priv->ibss_beacon)
3342                 dev_kfree_skb(priv->ibss_beacon);
3343
3344         priv->ibss_beacon = beacon;
3345         mutex_unlock(&priv->mutex);
3346
3347         iwl4965_send_beacon_cmd(priv);
3348 }
3349
3350 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3351                                 struct iwl4965_rx_mem_buffer *rxb)
3352 {
3353 #ifdef CONFIG_IWLWIFI_DEBUG
3354         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3355         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3356         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3357
3358         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3359                 "tsf %d %d rate %d\n",
3360                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3361                 beacon->beacon_notify_hdr.failure_frame,
3362                 le32_to_cpu(beacon->ibss_mgr_status),
3363                 le32_to_cpu(beacon->high_tsf),
3364                 le32_to_cpu(beacon->low_tsf), rate);
3365 #endif
3366
3367         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3368             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3369                 queue_work(priv->workqueue, &priv->beacon_update);
3370 }
3371
3372 /* Service response to REPLY_SCAN_CMD (0x80) */
3373 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3374                               struct iwl4965_rx_mem_buffer *rxb)
3375 {
3376 #ifdef CONFIG_IWLWIFI_DEBUG
3377         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3378         struct iwl4965_scanreq_notification *notif =
3379             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3380
3381         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3382 #endif
3383 }
3384
3385 /* Service SCAN_START_NOTIFICATION (0x82) */
3386 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3387                                     struct iwl4965_rx_mem_buffer *rxb)
3388 {
3389         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3390         struct iwl4965_scanstart_notification *notif =
3391             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3392         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3393         IWL_DEBUG_SCAN("Scan start: "
3394                        "%d [802.11%s] "
3395                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3396                        notif->channel,
3397                        notif->band ? "bg" : "a",
3398                        notif->tsf_high,
3399                        notif->tsf_low, notif->status, notif->beacon_timer);
3400 }
3401
3402 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3403 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3404                                       struct iwl4965_rx_mem_buffer *rxb)
3405 {
3406         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3407         struct iwl4965_scanresults_notification *notif =
3408             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3409
3410         IWL_DEBUG_SCAN("Scan ch.res: "
3411                        "%d [802.11%s] "
3412                        "(TSF: 0x%08X:%08X) - %d "
3413                        "elapsed=%lu usec (%dms since last)\n",
3414                        notif->channel,
3415                        notif->band ? "bg" : "a",
3416                        le32_to_cpu(notif->tsf_high),
3417                        le32_to_cpu(notif->tsf_low),
3418                        le32_to_cpu(notif->statistics[0]),
3419                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3420                        jiffies_to_msecs(elapsed_jiffies
3421                                         (priv->last_scan_jiffies, jiffies)));
3422
3423         priv->last_scan_jiffies = jiffies;
3424         priv->next_scan_jiffies = 0;
3425 }
3426
3427 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3428 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3429                                        struct iwl4965_rx_mem_buffer *rxb)
3430 {
3431         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3432         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3433
3434         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3435                        scan_notif->scanned_channels,
3436                        scan_notif->tsf_low,
3437                        scan_notif->tsf_high, scan_notif->status);
3438
3439         /* The HW is no longer scanning */
3440         clear_bit(STATUS_SCAN_HW, &priv->status);
3441
3442         /* The scan completion notification came in, so kill that timer... */
3443         cancel_delayed_work(&priv->scan_check);
3444
3445         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3446                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3447                        jiffies_to_msecs(elapsed_jiffies
3448                                         (priv->scan_pass_start, jiffies)));
3449
3450         /* Remove this scanned band from the list
3451          * of pending bands to scan */
3452         priv->scan_bands--;
3453
3454         /* If a request to abort was given, or the scan did not succeed
3455          * then we reset the scan state machine and terminate,
3456          * re-queuing another scan if one has been requested */
3457         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3458                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3459                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3460         } else {
3461                 /* If there are more bands on this scan pass reschedule */
3462                 if (priv->scan_bands > 0)
3463                         goto reschedule;
3464         }
3465
3466         priv->last_scan_jiffies = jiffies;
3467         priv->next_scan_jiffies = 0;
3468         IWL_DEBUG_INFO("Setting scan to off\n");
3469
3470         clear_bit(STATUS_SCANNING, &priv->status);
3471
3472         IWL_DEBUG_INFO("Scan took %dms\n",
3473                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3474
3475         queue_work(priv->workqueue, &priv->scan_completed);
3476
3477         return;
3478
3479 reschedule:
3480         priv->scan_pass_start = jiffies;
3481         queue_work(priv->workqueue, &priv->request_scan);
3482 }
3483
3484 /* Handle notification from uCode that card's power state is changing
3485  * due to software, hardware, or critical temperature RFKILL */
3486 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3487                                     struct iwl4965_rx_mem_buffer *rxb)
3488 {
3489         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3490         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3491         unsigned long status = priv->status;
3492
3493         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3494                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3495                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3496
3497         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3498                      RF_CARD_DISABLED)) {
3499
3500                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3501                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3502
3503                 if (!iwl_grab_nic_access(priv)) {
3504                         iwl_write_direct32(
3505                                 priv, HBUS_TARG_MBX_C,
3506                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3507
3508                         iwl_release_nic_access(priv);
3509                 }
3510
3511                 if (!(flags & RXON_CARD_DISABLED)) {
3512                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3513                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3514                         if (!iwl_grab_nic_access(priv)) {
3515                                 iwl_write_direct32(
3516                                         priv, HBUS_TARG_MBX_C,
3517                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3518
3519                                 iwl_release_nic_access(priv);
3520                         }
3521                 }
3522
3523                 if (flags & RF_CARD_DISABLED) {
3524                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3525                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3526                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3527                         if (!iwl_grab_nic_access(priv))
3528                                 iwl_release_nic_access(priv);
3529                 }
3530         }
3531
3532         if (flags & HW_CARD_DISABLED)
3533                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3534         else
3535                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3536
3537
3538         if (flags & SW_CARD_DISABLED)
3539                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3540         else
3541                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3542
3543         if (!(flags & RXON_CARD_DISABLED))
3544                 iwl4965_scan_cancel(priv);
3545
3546         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3547              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3548             (test_bit(STATUS_RF_KILL_SW, &status) !=
3549              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3550                 queue_work(priv->workqueue, &priv->rf_kill);
3551         else
3552                 wake_up_interruptible(&priv->wait_command_queue);
3553 }
3554
3555 /**
3556  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3557  *
3558  * Setup the RX handlers for each of the reply types sent from the uCode
3559  * to the host.
3560  *
3561  * This function chains into the hardware specific files for them to setup
3562  * any hardware specific handlers as well.
3563  */
3564 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3565 {
3566         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3567         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3568         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3569         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3570         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3571             iwl4965_rx_spectrum_measure_notif;
3572         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3573         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3574             iwl4965_rx_pm_debug_statistics_notif;
3575         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3576
3577         /*
3578          * The same handler is used for both the REPLY to a discrete
3579          * statistics request from the host as well as for the periodic
3580          * statistics notifications (after received beacons) from the uCode.
3581          */
3582         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3583         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3584
3585         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3586         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3587         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3588             iwl4965_rx_scan_results_notif;
3589         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3590             iwl4965_rx_scan_complete_notif;
3591         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3592         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3593
3594         /* Set up hardware specific Rx handlers */
3595         iwl4965_hw_rx_handler_setup(priv);
3596 }
3597
3598 /**
3599  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3600  * @rxb: Rx buffer to reclaim
3601  *
3602  * If an Rx buffer has an async callback associated with it the callback
3603  * will be executed.  The attached skb (if present) will only be freed
3604  * if the callback returns 1
3605  */
3606 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3607                                 struct iwl4965_rx_mem_buffer *rxb)
3608 {
3609         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3610         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3611         int txq_id = SEQ_TO_QUEUE(sequence);
3612         int index = SEQ_TO_INDEX(sequence);
3613         int huge = sequence & SEQ_HUGE_FRAME;
3614         int cmd_index;
3615         struct iwl_cmd *cmd;
3616
3617         /* If a Tx command is being handled and it isn't in the actual
3618          * command queue then there a command routing bug has been introduced
3619          * in the queue management code. */
3620         if (txq_id != IWL_CMD_QUEUE_NUM)
3621                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3622                           txq_id, pkt->hdr.cmd);
3623         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3624
3625         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3626         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3627
3628         /* Input error checking is done when commands are added to queue. */
3629         if (cmd->meta.flags & CMD_WANT_SKB) {
3630                 cmd->meta.source->u.skb = rxb->skb;
3631                 rxb->skb = NULL;
3632         } else if (cmd->meta.u.callback &&
3633                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3634                 rxb->skb = NULL;
3635
3636         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3637
3638         if (!(cmd->meta.flags & CMD_ASYNC)) {
3639                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3640                 wake_up_interruptible(&priv->wait_command_queue);
3641         }
3642 }
3643
3644 /************************** RX-FUNCTIONS ****************************/
3645 /*
3646  * Rx theory of operation
3647  *
3648  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3649  * each of which point to Receive Buffers to be filled by 4965.  These get
3650  * used not only for Rx frames, but for any command response or notification
3651  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3652  * of indexes into the circular buffer.
3653  *
3654  * Rx Queue Indexes
3655  * The host/firmware share two index registers for managing the Rx buffers.
3656  *
3657  * The READ index maps to the first position that the firmware may be writing
3658  * to -- the driver can read up to (but not including) this position and get
3659  * good data.
3660  * The READ index is managed by the firmware once the card is enabled.
3661  *
3662  * The WRITE index maps to the last position the driver has read from -- the
3663  * position preceding WRITE is the last slot the firmware can place a packet.
3664  *
3665  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3666  * WRITE = READ.
3667  *
3668  * During initialization, the host sets up the READ queue position to the first
3669  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3670  *
3671  * When the firmware places a packet in a buffer, it will advance the READ index
3672  * and fire the RX interrupt.  The driver can then query the READ index and
3673  * process as many packets as possible, moving the WRITE index forward as it
3674  * resets the Rx queue buffers with new memory.
3675  *
3676  * The management in the driver is as follows:
3677  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3678  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3679  *   to replenish the iwl->rxq->rx_free.
3680  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3681  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3682  *   'processed' and 'read' driver indexes as well)
3683  * + A received packet is processed and handed to the kernel network stack,
3684  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3685  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3686  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3687  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3688  *   were enough free buffers and RX_STALLED is set it is cleared.
3689  *
3690  *
3691  * Driver sequence:
3692  *
3693  * iwl4965_rx_queue_alloc()   Allocates rx_free
3694  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3695  *                            iwl4965_rx_queue_restock
3696  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3697  *                            queue, updates firmware pointers, and updates
3698  *                            the WRITE index.  If insufficient rx_free buffers
3699  *                            are available, schedules iwl4965_rx_replenish
3700  *
3701  * -- enable interrupts --
3702  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3703  *                            READ INDEX, detaching the SKB from the pool.
3704  *                            Moves the packet buffer from queue to rx_used.
3705  *                            Calls iwl4965_rx_queue_restock to refill any empty
3706  *                            slots.
3707  * ...
3708  *
3709  */
3710
3711 /**
3712  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3713  */
3714 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3715 {
3716         int s = q->read - q->write;
3717         if (s <= 0)
3718                 s += RX_QUEUE_SIZE;
3719         /* keep some buffer to not confuse full and empty queue */
3720         s -= 2;
3721         if (s < 0)
3722                 s = 0;
3723         return s;
3724 }
3725
3726 /**
3727  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3728  */
3729 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3730 {
3731         u32 reg = 0;
3732         int rc = 0;
3733         unsigned long flags;
3734
3735         spin_lock_irqsave(&q->lock, flags);
3736
3737         if (q->need_update == 0)
3738                 goto exit_unlock;
3739
3740         /* If power-saving is in use, make sure device is awake */
3741         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3742                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3743
3744                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3745                         iwl_set_bit(priv, CSR_GP_CNTRL,
3746                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3747                         goto exit_unlock;
3748                 }
3749
3750                 rc = iwl_grab_nic_access(priv);
3751                 if (rc)
3752                         goto exit_unlock;
3753
3754                 /* Device expects a multiple of 8 */
3755                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3756                                      q->write & ~0x7);
3757                 iwl_release_nic_access(priv);
3758
3759         /* Else device is assumed to be awake */
3760         } else
3761                 /* Device expects a multiple of 8 */
3762                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3763
3764
3765         q->need_update = 0;
3766
3767  exit_unlock:
3768         spin_unlock_irqrestore(&q->lock, flags);
3769         return rc;
3770 }
3771
3772 /**
3773  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3774  */
3775 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3776                                           dma_addr_t dma_addr)
3777 {
3778         return cpu_to_le32((u32)(dma_addr >> 8));
3779 }
3780
3781
3782 /**
3783  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3784  *
3785  * If there are slots in the RX queue that need to be restocked,
3786  * and we have free pre-allocated buffers, fill the ranks as much
3787  * as we can, pulling from rx_free.
3788  *
3789  * This moves the 'write' index forward to catch up with 'processed', and
3790  * also updates the memory address in the firmware to reference the new
3791  * target buffer.
3792  */
3793 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3794 {
3795         struct iwl4965_rx_queue *rxq = &priv->rxq;
3796         struct list_head *element;
3797         struct iwl4965_rx_mem_buffer *rxb;
3798         unsigned long flags;
3799         int write, rc;
3800
3801         spin_lock_irqsave(&rxq->lock, flags);
3802         write = rxq->write & ~0x7;
3803         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3804                 /* Get next free Rx buffer, remove from free list */
3805                 element = rxq->rx_free.next;
3806                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3807                 list_del(element);
3808
3809                 /* Point to Rx buffer via next RBD in circular buffer */
3810                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3811                 rxq->queue[rxq->write] = rxb;
3812                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3813                 rxq->free_count--;
3814         }
3815         spin_unlock_irqrestore(&rxq->lock, flags);
3816         /* If the pre-allocated buffer pool is dropping low, schedule to
3817          * refill it */
3818         if (rxq->free_count <= RX_LOW_WATERMARK)
3819                 queue_work(priv->workqueue, &priv->rx_replenish);
3820
3821
3822         /* If we've added more space for the firmware to place data, tell it.
3823          * Increment device's write pointer in multiples of 8. */
3824         if ((write != (rxq->write & ~0x7))
3825             || (abs(rxq->write - rxq->read) > 7)) {
3826                 spin_lock_irqsave(&rxq->lock, flags);
3827                 rxq->need_update = 1;
3828                 spin_unlock_irqrestore(&rxq->lock, flags);
3829                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3830                 if (rc)
3831                         return rc;
3832         }
3833
3834         return 0;
3835 }
3836
3837 /**
3838  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3839  *
3840  * When moving to rx_free an SKB is allocated for the slot.
3841  *
3842  * Also restock the Rx queue via iwl4965_rx_queue_restock.
3843  * This is called as a scheduled work item (except for during initialization)
3844  */
3845 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3846 {
3847         struct iwl4965_rx_queue *rxq = &priv->rxq;
3848         struct list_head *element;
3849         struct iwl4965_rx_mem_buffer *rxb;
3850         unsigned long flags;
3851         spin_lock_irqsave(&rxq->lock, flags);
3852         while (!list_empty(&rxq->rx_used)) {
3853                 element = rxq->rx_used.next;
3854                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3855
3856                 /* Alloc a new receive buffer */
3857                 rxb->skb =
3858                     alloc_skb(priv->hw_setting.rx_buf_size,
3859                                 __GFP_NOWARN | GFP_ATOMIC);
3860                 if (!rxb->skb) {
3861                         if (net_ratelimit())
3862                                 printk(KERN_CRIT DRV_NAME
3863                                        ": Can not allocate SKB buffers\n");
3864                         /* We don't reschedule replenish work here -- we will
3865                          * call the restock method and if it still needs
3866                          * more buffers it will schedule replenish */
3867                         break;
3868                 }
3869                 priv->alloc_rxb_skb++;
3870                 list_del(element);
3871
3872                 /* Get physical address of RB/SKB */
3873                 rxb->dma_addr =
3874                     pci_map_single(priv->pci_dev, rxb->skb->data,
3875                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
3876                 list_add_tail(&rxb->list, &rxq->rx_free);
3877                 rxq->free_count++;
3878         }
3879         spin_unlock_irqrestore(&rxq->lock, flags);
3880 }
3881
3882 /*
3883  * this should be called while priv->lock is locked
3884 */
3885 static void __iwl4965_rx_replenish(void *data)
3886 {
3887         struct iwl_priv *priv = data;
3888
3889         iwl4965_rx_allocate(priv);
3890         iwl4965_rx_queue_restock(priv);
3891 }
3892
3893
3894 void iwl4965_rx_replenish(void *data)
3895 {
3896         struct iwl_priv *priv = data;
3897         unsigned long flags;
3898
3899         iwl4965_rx_allocate(priv);
3900
3901         spin_lock_irqsave(&priv->lock, flags);
3902         iwl4965_rx_queue_restock(priv);
3903         spin_unlock_irqrestore(&priv->lock, flags);
3904 }
3905
3906 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3907  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3908  * This free routine walks the list of POOL entries and if SKB is set to
3909  * non NULL it is unmapped and freed
3910  */
3911 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3912 {
3913         int i;
3914         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3915                 if (rxq->pool[i].skb != NULL) {
3916                         pci_unmap_single(priv->pci_dev,
3917                                          rxq->pool[i].dma_addr,
3918                                          priv->hw_setting.rx_buf_size,
3919                                          PCI_DMA_FROMDEVICE);
3920                         dev_kfree_skb(rxq->pool[i].skb);
3921                 }
3922         }
3923
3924         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3925                             rxq->dma_addr);
3926         rxq->bd = NULL;
3927 }
3928
3929 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3930 {
3931         struct iwl4965_rx_queue *rxq = &priv->rxq;
3932         struct pci_dev *dev = priv->pci_dev;
3933         int i;
3934
3935         spin_lock_init(&rxq->lock);
3936         INIT_LIST_HEAD(&rxq->rx_free);
3937         INIT_LIST_HEAD(&rxq->rx_used);
3938
3939         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3940         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3941         if (!rxq->bd)
3942                 return -ENOMEM;
3943
3944         /* Fill the rx_used queue with _all_ of the Rx buffers */
3945         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3946                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3947
3948         /* Set us so that we have processed and used all buffers, but have
3949          * not restocked the Rx queue with fresh buffers */
3950         rxq->read = rxq->write = 0;
3951         rxq->free_count = 0;
3952         rxq->need_update = 0;
3953         return 0;
3954 }
3955
3956 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3957 {
3958         unsigned long flags;
3959         int i;
3960         spin_lock_irqsave(&rxq->lock, flags);
3961         INIT_LIST_HEAD(&rxq->rx_free);
3962         INIT_LIST_HEAD(&rxq->rx_used);
3963         /* Fill the rx_used queue with _all_ of the Rx buffers */
3964         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3965                 /* In the reset function, these buffers may have been allocated
3966                  * to an SKB, so we need to unmap and free potential storage */
3967                 if (rxq->pool[i].skb != NULL) {
3968                         pci_unmap_single(priv->pci_dev,
3969                                          rxq->pool[i].dma_addr,
3970                                          priv->hw_setting.rx_buf_size,
3971                                          PCI_DMA_FROMDEVICE);
3972                         priv->alloc_rxb_skb--;
3973                         dev_kfree_skb(rxq->pool[i].skb);
3974                         rxq->pool[i].skb = NULL;
3975                 }
3976                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3977         }
3978
3979         /* Set us so that we have processed and used all buffers, but have
3980          * not restocked the Rx queue with fresh buffers */
3981         rxq->read = rxq->write = 0;
3982         rxq->free_count = 0;
3983         spin_unlock_irqrestore(&rxq->lock, flags);
3984 }
3985
3986 /* Convert linear signal-to-noise ratio into dB */
3987 static u8 ratio2dB[100] = {
3988 /*       0   1   2   3   4   5   6   7   8   9 */
3989          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3990         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3991         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3992         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3993         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3994         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3995         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3996         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3997         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3998         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3999 };
4000
4001 /* Calculates a relative dB value from a ratio of linear
4002  *   (i.e. not dB) signal levels.
4003  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4004 int iwl4965_calc_db_from_ratio(int sig_ratio)
4005 {
4006         /* 1000:1 or higher just report as 60 dB */
4007         if (sig_ratio >= 1000)
4008                 return 60;
4009
4010         /* 100:1 or higher, divide by 10 and use table,
4011          *   add 20 dB to make up for divide by 10 */
4012         if (sig_ratio >= 100)
4013                 return (20 + (int)ratio2dB[sig_ratio/10]);
4014
4015         /* We shouldn't see this */
4016         if (sig_ratio < 1)
4017                 return 0;
4018
4019         /* Use table for ratios 1:1 - 99:1 */
4020         return (int)ratio2dB[sig_ratio];
4021 }
4022
4023 #define PERFECT_RSSI (-20) /* dBm */
4024 #define WORST_RSSI (-95)   /* dBm */
4025 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4026
4027 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4028  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4029  *   about formulas used below. */
4030 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4031 {
4032         int sig_qual;
4033         int degradation = PERFECT_RSSI - rssi_dbm;
4034
4035         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4036          * as indicator; formula is (signal dbm - noise dbm).
4037          * SNR at or above 40 is a great signal (100%).
4038          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4039          * Weakest usable signal is usually 10 - 15 dB SNR. */
4040         if (noise_dbm) {
4041                 if (rssi_dbm - noise_dbm >= 40)
4042                         return 100;
4043                 else if (rssi_dbm < noise_dbm)
4044                         return 0;
4045                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4046
4047         /* Else use just the signal level.
4048          * This formula is a least squares fit of data points collected and
4049          *   compared with a reference system that had a percentage (%) display
4050          *   for signal quality. */
4051         } else
4052                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4053                             (15 * RSSI_RANGE + 62 * degradation)) /
4054                            (RSSI_RANGE * RSSI_RANGE);
4055
4056         if (sig_qual > 100)
4057                 sig_qual = 100;
4058         else if (sig_qual < 1)
4059                 sig_qual = 0;
4060
4061         return sig_qual;
4062 }
4063
4064 /**
4065  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4066  *
4067  * Uses the priv->rx_handlers callback function array to invoke
4068  * the appropriate handlers, including command responses,
4069  * frame-received notifications, and other notifications.
4070  */
4071 static void iwl4965_rx_handle(struct iwl_priv *priv)
4072 {
4073         struct iwl4965_rx_mem_buffer *rxb;
4074         struct iwl4965_rx_packet *pkt;
4075         struct iwl4965_rx_queue *rxq = &priv->rxq;
4076         u32 r, i;
4077         int reclaim;
4078         unsigned long flags;
4079         u8 fill_rx = 0;
4080         u32 count = 8;
4081
4082         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4083          * buffer that the driver may process (last buffer filled by ucode). */
4084         r = iwl4965_hw_get_rx_read(priv);
4085         i = rxq->read;
4086
4087         /* Rx interrupt, but nothing sent from uCode */
4088         if (i == r)
4089                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4090
4091         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4092                 fill_rx = 1;
4093
4094         while (i != r) {
4095                 rxb = rxq->queue[i];
4096
4097                 /* If an RXB doesn't have a Rx queue slot associated with it,
4098                  * then a bug has been introduced in the queue refilling
4099                  * routines -- catch it here */
4100                 BUG_ON(rxb == NULL);
4101
4102                 rxq->queue[i] = NULL;
4103
4104                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4105                                             priv->hw_setting.rx_buf_size,
4106                                             PCI_DMA_FROMDEVICE);
4107                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4108
4109                 /* Reclaim a command buffer only if this packet is a response
4110                  *   to a (driver-originated) command.
4111                  * If the packet (e.g. Rx frame) originated from uCode,
4112                  *   there is no command buffer to reclaim.
4113                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4114                  *   but apparently a few don't get set; catch them here. */
4115                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4116                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4117                         (pkt->hdr.cmd != REPLY_RX) &&
4118                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4119                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4120                         (pkt->hdr.cmd != REPLY_TX);
4121
4122                 /* Based on type of command response or notification,
4123                  *   handle those that need handling via function in
4124                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4125                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4126                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4127                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4128                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4129                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4130                 } else {
4131                         /* No handling needed */
4132                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4133                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4134                                 r, i, get_cmd_string(pkt->hdr.cmd),
4135                                 pkt->hdr.cmd);
4136                 }
4137
4138                 if (reclaim) {
4139                         /* Invoke any callbacks, transfer the skb to caller, and
4140                          * fire off the (possibly) blocking iwl_send_cmd()
4141                          * as we reclaim the driver command queue */
4142                         if (rxb && rxb->skb)
4143                                 iwl4965_tx_cmd_complete(priv, rxb);
4144                         else
4145                                 IWL_WARNING("Claim null rxb?\n");
4146                 }
4147
4148                 /* For now we just don't re-use anything.  We can tweak this
4149                  * later to try and re-use notification packets and SKBs that
4150                  * fail to Rx correctly */
4151                 if (rxb->skb != NULL) {
4152                         priv->alloc_rxb_skb--;
4153                         dev_kfree_skb_any(rxb->skb);
4154                         rxb->skb = NULL;
4155                 }
4156
4157                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4158                                  priv->hw_setting.rx_buf_size,
4159                                  PCI_DMA_FROMDEVICE);
4160                 spin_lock_irqsave(&rxq->lock, flags);
4161                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4162                 spin_unlock_irqrestore(&rxq->lock, flags);
4163                 i = (i + 1) & RX_QUEUE_MASK;
4164                 /* If there are a lot of unused frames,
4165                  * restock the Rx queue so ucode wont assert. */
4166                 if (fill_rx) {
4167                         count++;
4168                         if (count >= 8) {
4169                                 priv->rxq.read = i;
4170                                 __iwl4965_rx_replenish(priv);
4171                                 count = 0;
4172                         }
4173                 }
4174         }
4175
4176         /* Backtrack one entry */
4177         priv->rxq.read = i;
4178         iwl4965_rx_queue_restock(priv);
4179 }
4180
4181 /**
4182  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4183  */
4184 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
4185                                   struct iwl4965_tx_queue *txq)
4186 {
4187         u32 reg = 0;
4188         int rc = 0;
4189         int txq_id = txq->q.id;
4190
4191         if (txq->need_update == 0)
4192                 return rc;
4193
4194         /* if we're trying to save power */
4195         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4196                 /* wake up nic if it's powered down ...
4197                  * uCode will wake up, and interrupt us again, so next
4198                  * time we'll skip this part. */
4199                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4200
4201                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4202                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4203                         iwl_set_bit(priv, CSR_GP_CNTRL,
4204                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4205                         return rc;
4206                 }
4207
4208                 /* restore this queue's parameters in nic hardware. */
4209                 rc = iwl_grab_nic_access(priv);
4210                 if (rc)
4211                         return rc;
4212                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
4213                                      txq->q.write_ptr | (txq_id << 8));
4214                 iwl_release_nic_access(priv);
4215
4216         /* else not in power-save mode, uCode will never sleep when we're
4217          * trying to tx (during RFKILL, we're not trying to tx). */
4218         } else
4219                 iwl_write32(priv, HBUS_TARG_WRPTR,
4220                             txq->q.write_ptr | (txq_id << 8));
4221
4222         txq->need_update = 0;
4223
4224         return rc;
4225 }
4226
4227 #ifdef CONFIG_IWLWIFI_DEBUG
4228 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4229 {
4230         DECLARE_MAC_BUF(mac);
4231
4232         IWL_DEBUG_RADIO("RX CONFIG:\n");
4233         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4234         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4235         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4236         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4237                         le32_to_cpu(rxon->filter_flags));
4238         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4239         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4240                         rxon->ofdm_basic_rates);
4241         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4242         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4243                         print_mac(mac, rxon->node_addr));
4244         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4245                         print_mac(mac, rxon->bssid_addr));
4246         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4247 }
4248 #endif
4249
4250 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
4251 {
4252         IWL_DEBUG_ISR("Enabling interrupts\n");
4253         set_bit(STATUS_INT_ENABLED, &priv->status);
4254         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4255 }
4256
4257 /* call this function to flush any scheduled tasklet */
4258 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
4259 {
4260         /* wait to make sure we flush pedding tasklet*/
4261         synchronize_irq(priv->pci_dev->irq);
4262         tasklet_kill(&priv->irq_tasklet);
4263 }
4264
4265 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
4266 {
4267         clear_bit(STATUS_INT_ENABLED, &priv->status);
4268
4269         /* disable interrupts from uCode/NIC to host */
4270         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4271
4272         /* acknowledge/clear/reset any interrupts still pending
4273          * from uCode or flow handler (Rx/Tx DMA) */
4274         iwl_write32(priv, CSR_INT, 0xffffffff);
4275         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4276         IWL_DEBUG_ISR("Disabled interrupts\n");
4277 }
4278
4279 static const char *desc_lookup(int i)
4280 {
4281         switch (i) {
4282         case 1:
4283                 return "FAIL";
4284         case 2:
4285                 return "BAD_PARAM";
4286         case 3:
4287                 return "BAD_CHECKSUM";
4288         case 4:
4289                 return "NMI_INTERRUPT";
4290         case 5:
4291                 return "SYSASSERT";
4292         case 6:
4293                 return "FATAL_ERROR";
4294         }
4295
4296         return "UNKNOWN";
4297 }
4298
4299 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4300 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4301
4302 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
4303 {
4304         u32 data2, line;
4305         u32 desc, time, count, base, data1;
4306         u32 blink1, blink2, ilink1, ilink2;
4307         int rc;
4308
4309         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4310
4311         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4312                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4313                 return;
4314         }
4315
4316         rc = iwl_grab_nic_access(priv);
4317         if (rc) {
4318                 IWL_WARNING("Can not read from adapter at this time.\n");
4319                 return;
4320         }
4321
4322         count = iwl_read_targ_mem(priv, base);
4323
4324         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4325                 IWL_ERROR("Start IWL Error Log Dump:\n");
4326                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4327         }
4328
4329         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4330         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4331         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4332         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4333         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4334         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4335         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4336         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4337         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4338
4339         IWL_ERROR("Desc               Time       "
4340                   "data1      data2      line\n");
4341         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4342                   desc_lookup(desc), desc, time, data1, data2, line);
4343         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4344         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4345                   ilink1, ilink2);
4346
4347         iwl_release_nic_access(priv);
4348 }
4349
4350 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4351
4352 /**
4353  * iwl4965_print_event_log - Dump error event log to syslog
4354  *
4355  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4356  */
4357 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4358                                 u32 num_events, u32 mode)
4359 {
4360         u32 i;
4361         u32 base;       /* SRAM byte address of event log header */
4362         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4363         u32 ptr;        /* SRAM byte address of log data */
4364         u32 ev, time, data; /* event log data */
4365
4366         if (num_events == 0)
4367                 return;
4368
4369         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4370
4371         if (mode == 0)
4372                 event_size = 2 * sizeof(u32);
4373         else
4374                 event_size = 3 * sizeof(u32);
4375
4376         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4377
4378         /* "time" is actually "data" for mode 0 (no timestamp).
4379          * place event id # at far right for easier visual parsing. */
4380         for (i = 0; i < num_events; i++) {
4381                 ev = iwl_read_targ_mem(priv, ptr);
4382                 ptr += sizeof(u32);
4383                 time = iwl_read_targ_mem(priv, ptr);
4384                 ptr += sizeof(u32);
4385                 if (mode == 0)
4386                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4387                 else {
4388                         data = iwl_read_targ_mem(priv, ptr);
4389                         ptr += sizeof(u32);
4390                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4391                 }
4392         }
4393 }
4394
4395 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4396 {
4397         int rc;
4398         u32 base;       /* SRAM byte address of event log header */
4399         u32 capacity;   /* event log capacity in # entries */
4400         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4401         u32 num_wraps;  /* # times uCode wrapped to top of log */
4402         u32 next_entry; /* index of next entry to be written by uCode */
4403         u32 size;       /* # entries that we'll print */
4404
4405         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4406         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4407                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4408                 return;
4409         }
4410
4411         rc = iwl_grab_nic_access(priv);
4412         if (rc) {
4413                 IWL_WARNING("Can not read from adapter at this time.\n");
4414                 return;
4415         }
4416
4417         /* event log header */
4418         capacity = iwl_read_targ_mem(priv, base);
4419         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4420         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4421         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4422
4423         size = num_wraps ? capacity : next_entry;
4424
4425         /* bail out if nothing in log */
4426         if (size == 0) {
4427                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4428                 iwl_release_nic_access(priv);
4429                 return;
4430         }
4431
4432         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4433                   size, num_wraps);
4434
4435         /* if uCode has wrapped back to top of log, start at the oldest entry,
4436          * i.e the next one that uCode would fill. */
4437         if (num_wraps)
4438                 iwl4965_print_event_log(priv, next_entry,
4439                                     capacity - next_entry, mode);
4440
4441         /* (then/else) start at top of log */
4442         iwl4965_print_event_log(priv, 0, next_entry, mode);
4443
4444         iwl_release_nic_access(priv);
4445 }
4446
4447 /**
4448  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4449  */
4450 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4451 {
4452         /* Set the FW error flag -- cleared on iwl4965_down */
4453         set_bit(STATUS_FW_ERROR, &priv->status);
4454
4455         /* Cancel currently queued command. */
4456         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4457
4458 #ifdef CONFIG_IWLWIFI_DEBUG
4459         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4460                 iwl4965_dump_nic_error_log(priv);
4461                 iwl4965_dump_nic_event_log(priv);
4462                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4463         }
4464 #endif
4465
4466         wake_up_interruptible(&priv->wait_command_queue);
4467
4468         /* Keep the restart process from trying to send host
4469          * commands by clearing the INIT status bit */
4470         clear_bit(STATUS_READY, &priv->status);
4471
4472         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4473                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4474                           "Restarting adapter due to uCode error.\n");
4475
4476                 if (iwl_is_associated(priv)) {
4477                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4478                                sizeof(priv->recovery_rxon));
4479                         priv->error_recovering = 1;
4480                 }
4481                 queue_work(priv->workqueue, &priv->restart);
4482         }
4483 }
4484
4485 static void iwl4965_error_recovery(struct iwl_priv *priv)
4486 {
4487         unsigned long flags;
4488
4489         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4490                sizeof(priv->staging_rxon));
4491         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4492         iwl4965_commit_rxon(priv);
4493
4494         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4495
4496         spin_lock_irqsave(&priv->lock, flags);
4497         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4498         priv->error_recovering = 0;
4499         spin_unlock_irqrestore(&priv->lock, flags);
4500 }
4501
4502 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4503 {
4504         u32 inta, handled = 0;
4505         u32 inta_fh;
4506         unsigned long flags;
4507 #ifdef CONFIG_IWLWIFI_DEBUG
4508         u32 inta_mask;
4509 #endif
4510
4511         spin_lock_irqsave(&priv->lock, flags);
4512
4513         /* Ack/clear/reset pending uCode interrupts.
4514          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4515          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4516         inta = iwl_read32(priv, CSR_INT);
4517         iwl_write32(priv, CSR_INT, inta);
4518
4519         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4520          * Any new interrupts that happen after this, either while we're
4521          * in this tasklet, or later, will show up in next ISR/tasklet. */
4522         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4523         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4524
4525 #ifdef CONFIG_IWLWIFI_DEBUG
4526         if (iwl_debug_level & IWL_DL_ISR) {
4527                 /* just for debug */
4528                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4529                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4530                               inta, inta_mask, inta_fh);
4531         }
4532 #endif
4533
4534         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4535          * atomic, make sure that inta covers all the interrupts that
4536          * we've discovered, even if FH interrupt came in just after
4537          * reading CSR_INT. */
4538         if (inta_fh & CSR49_FH_INT_RX_MASK)
4539                 inta |= CSR_INT_BIT_FH_RX;
4540         if (inta_fh & CSR49_FH_INT_TX_MASK)
4541                 inta |= CSR_INT_BIT_FH_TX;
4542
4543         /* Now service all interrupt bits discovered above. */
4544         if (inta & CSR_INT_BIT_HW_ERR) {
4545                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4546
4547                 /* Tell the device to stop sending interrupts */
4548                 iwl4965_disable_interrupts(priv);
4549
4550                 iwl4965_irq_handle_error(priv);
4551
4552                 handled |= CSR_INT_BIT_HW_ERR;
4553
4554                 spin_unlock_irqrestore(&priv->lock, flags);
4555
4556                 return;
4557         }
4558
4559 #ifdef CONFIG_IWLWIFI_DEBUG
4560         if (iwl_debug_level & (IWL_DL_ISR)) {
4561                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4562                 if (inta & CSR_INT_BIT_SCD)
4563                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4564                                       "the frame/frames.\n");
4565
4566                 /* Alive notification via Rx interrupt will do the real work */
4567                 if (inta & CSR_INT_BIT_ALIVE)
4568                         IWL_DEBUG_ISR("Alive interrupt\n");
4569         }
4570 #endif
4571         /* Safely ignore these bits for debug checks below */
4572         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4573
4574         /* HW RF KILL switch toggled */
4575         if (inta & CSR_INT_BIT_RF_KILL) {
4576                 int hw_rf_kill = 0;
4577                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4578                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4579                         hw_rf_kill = 1;
4580
4581                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4582                                 "RF_KILL bit toggled to %s.\n",
4583                                 hw_rf_kill ? "disable radio":"enable radio");
4584
4585                 /* Queue restart only if RF_KILL switch was set to "kill"
4586                  *   when we loaded driver, and is now set to "enable".
4587                  * After we're Alive, RF_KILL gets handled by
4588                  *   iwl4965_rx_card_state_notif() */
4589                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4590                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4591                         queue_work(priv->workqueue, &priv->restart);
4592                 }
4593
4594                 handled |= CSR_INT_BIT_RF_KILL;
4595         }
4596
4597         /* Chip got too hot and stopped itself */
4598         if (inta & CSR_INT_BIT_CT_KILL) {
4599                 IWL_ERROR("Microcode CT kill error detected.\n");
4600                 handled |= CSR_INT_BIT_CT_KILL;
4601         }
4602
4603         /* Error detected by uCode */
4604         if (inta & CSR_INT_BIT_SW_ERR) {
4605                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4606                           inta);
4607                 iwl4965_irq_handle_error(priv);
4608                 handled |= CSR_INT_BIT_SW_ERR;
4609         }
4610
4611         /* uCode wakes up after power-down sleep */
4612         if (inta & CSR_INT_BIT_WAKEUP) {
4613                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4614                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4615                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4616                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4617                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4618                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4619                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4620                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4621
4622                 handled |= CSR_INT_BIT_WAKEUP;
4623         }
4624
4625         /* All uCode command responses, including Tx command responses,
4626          * Rx "responses" (frame-received notification), and other
4627          * notifications from uCode come through here*/
4628         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4629                 iwl4965_rx_handle(priv);
4630                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4631         }
4632
4633         if (inta & CSR_INT_BIT_FH_TX) {
4634                 IWL_DEBUG_ISR("Tx interrupt\n");
4635                 handled |= CSR_INT_BIT_FH_TX;
4636         }
4637
4638         if (inta & ~handled)
4639                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4640
4641         if (inta & ~CSR_INI_SET_MASK) {
4642                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4643                          inta & ~CSR_INI_SET_MASK);
4644                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4645         }
4646
4647         /* Re-enable all interrupts */
4648         /* only Re-enable if diabled by irq */
4649         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4650                 iwl4965_enable_interrupts(priv);
4651
4652 #ifdef CONFIG_IWLWIFI_DEBUG
4653         if (iwl_debug_level & (IWL_DL_ISR)) {
4654                 inta = iwl_read32(priv, CSR_INT);
4655                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4656                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4657                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4658                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4659         }
4660 #endif
4661         spin_unlock_irqrestore(&priv->lock, flags);
4662 }
4663
4664 static irqreturn_t iwl4965_isr(int irq, void *data)
4665 {
4666         struct iwl_priv *priv = data;
4667         u32 inta, inta_mask;
4668         u32 inta_fh;
4669         if (!priv)
4670                 return IRQ_NONE;
4671
4672         spin_lock(&priv->lock);
4673
4674         /* Disable (but don't clear!) interrupts here to avoid
4675          *    back-to-back ISRs and sporadic interrupts from our NIC.
4676          * If we have something to service, the tasklet will re-enable ints.
4677          * If we *don't* have something, we'll re-enable before leaving here. */
4678         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4679         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4680
4681         /* Discover which interrupts are active/pending */
4682         inta = iwl_read32(priv, CSR_INT);
4683         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4684
4685         /* Ignore interrupt if there's nothing in NIC to service.
4686          * This may be due to IRQ shared with another device,
4687          * or due to sporadic interrupts thrown from our NIC. */
4688         if (!inta && !inta_fh) {
4689                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4690                 goto none;
4691         }
4692
4693         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4694                 /* Hardware disappeared. It might have already raised
4695                  * an interrupt */
4696                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4697                 goto unplugged;
4698         }
4699
4700         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4701                       inta, inta_mask, inta_fh);
4702
4703         inta &= ~CSR_INT_BIT_SCD;
4704
4705         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4706         if (likely(inta || inta_fh))
4707                 tasklet_schedule(&priv->irq_tasklet);
4708
4709  unplugged:
4710         spin_unlock(&priv->lock);
4711         return IRQ_HANDLED;
4712
4713  none:
4714         /* re-enable interrupts here since we don't have anything to service. */
4715         /* only Re-enable if diabled by irq */
4716         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4717                 iwl4965_enable_interrupts(priv);
4718         spin_unlock(&priv->lock);
4719         return IRQ_NONE;
4720 }
4721
4722 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4723  * sending probe req.  This should be set long enough to hear probe responses
4724  * from more than one AP.  */
4725 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4726 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4727
4728 /* For faster active scanning, scan will move to the next channel if fewer than
4729  * PLCP_QUIET_THRESH packets are heard on this channel within
4730  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4731  * time if it's a quiet channel (nothing responded to our probe, and there's
4732  * no other traffic).
4733  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4734 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4735 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4736
4737 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4738  * Must be set longer than active dwell time.
4739  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4740 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4741 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4742 #define IWL_PASSIVE_DWELL_BASE      (100)
4743 #define IWL_CHANNEL_TUNE_TIME       5
4744
4745 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4746                                                 enum ieee80211_band band)
4747 {
4748         if (band == IEEE80211_BAND_5GHZ)
4749                 return IWL_ACTIVE_DWELL_TIME_52;
4750         else
4751                 return IWL_ACTIVE_DWELL_TIME_24;
4752 }
4753
4754 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4755                                           enum ieee80211_band band)
4756 {
4757         u16 active = iwl4965_get_active_dwell_time(priv, band);
4758         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4759             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4760             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4761
4762         if (iwl_is_associated(priv)) {
4763                 /* If we're associated, we clamp the maximum passive
4764                  * dwell time to be 98% of the beacon interval (minus
4765                  * 2 * channel tune time) */
4766                 passive = priv->beacon_int;
4767                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4768                         passive = IWL_PASSIVE_DWELL_BASE;
4769                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4770         }
4771
4772         if (passive <= active)
4773                 passive = active + 1;
4774
4775         return passive;
4776 }
4777
4778 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4779                                          enum ieee80211_band band,
4780                                      u8 is_active, u8 direct_mask,
4781                                      struct iwl4965_scan_channel *scan_ch)
4782 {
4783         const struct ieee80211_channel *channels = NULL;
4784         const struct ieee80211_supported_band *sband;
4785         const struct iwl_channel_info *ch_info;
4786         u16 passive_dwell = 0;
4787         u16 active_dwell = 0;
4788         int added, i;
4789
4790         sband = iwl4965_get_hw_mode(priv, band);
4791         if (!sband)
4792                 return 0;
4793
4794         channels = sband->channels;
4795
4796         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4797         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4798
4799         for (i = 0, added = 0; i < sband->n_channels; i++) {
4800                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4801                         continue;
4802
4803                 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
4804                     le16_to_cpu(priv->active_rxon.channel)) {
4805                         if (iwl_is_associated(priv)) {
4806                                 IWL_DEBUG_SCAN
4807                                     ("Skipping current channel %d\n",
4808                                      le16_to_cpu(priv->active_rxon.channel));
4809                                 continue;
4810                         }
4811                 } else if (priv->only_active_channel)
4812                         continue;
4813
4814                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4815
4816                 ch_info = iwl_get_channel_info(priv, band,
4817                                          scan_ch->channel);
4818                 if (!is_channel_valid(ch_info)) {
4819                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4820                                        scan_ch->channel);
4821                         continue;
4822                 }
4823
4824                 if (!is_active || is_channel_passive(ch_info) ||
4825                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4826                         scan_ch->type = 0;      /* passive */
4827                 else
4828                         scan_ch->type = 1;      /* active */
4829
4830                 if (scan_ch->type & 1)
4831                         scan_ch->type |= (direct_mask << 1);
4832
4833                 if (is_channel_narrow(ch_info))
4834                         scan_ch->type |= (1 << 7);
4835
4836                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4837                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4838
4839                 /* Set txpower levels to defaults */
4840                 scan_ch->tpc.dsp_atten = 110;
4841                 /* scan_pwr_info->tpc.dsp_atten; */
4842
4843                 /*scan_pwr_info->tpc.tx_gain; */
4844                 if (band == IEEE80211_BAND_5GHZ)
4845                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4846                 else {
4847                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4848                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4849                          * power level:
4850                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4851                          */
4852                 }
4853
4854                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4855                                scan_ch->channel,
4856                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4857                                (scan_ch->type & 1) ?
4858                                active_dwell : passive_dwell);
4859
4860                 scan_ch++;
4861                 added++;
4862         }
4863
4864         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4865         return added;
4866 }
4867
4868 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4869                               struct ieee80211_rate *rates)
4870 {
4871         int i;
4872
4873         for (i = 0; i < IWL_RATE_COUNT; i++) {
4874                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4875                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4876                 rates[i].hw_value_short = i;
4877                 rates[i].flags = 0;
4878                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4879                         /*
4880                          * If CCK != 1M then set short preamble rate flag.
4881                          */
4882                         rates[i].flags |=
4883                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4884                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
4885                 }
4886         }
4887 }
4888
4889 /**
4890  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4891  */
4892 int iwl4965_init_geos(struct iwl_priv *priv)
4893 {
4894         struct iwl_channel_info *ch;
4895         struct ieee80211_supported_band *sband;
4896         struct ieee80211_channel *channels;
4897         struct ieee80211_channel *geo_ch;
4898         struct ieee80211_rate *rates;
4899         int i = 0;
4900
4901         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4902             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4903                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4904                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4905                 return 0;
4906         }
4907
4908         channels = kzalloc(sizeof(struct ieee80211_channel) *
4909                            priv->channel_count, GFP_KERNEL);
4910         if (!channels)
4911                 return -ENOMEM;
4912
4913         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4914                         GFP_KERNEL);
4915         if (!rates) {
4916                 kfree(channels);
4917                 return -ENOMEM;
4918         }
4919
4920         /* 5.2GHz channels start after the 2.4GHz channels */
4921         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4922         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4923         /* just OFDM */
4924         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4925         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4926
4927         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4928
4929         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4930         sband->channels = channels;
4931         /* OFDM & CCK */
4932         sband->bitrates = rates;
4933         sband->n_bitrates = IWL_RATE_COUNT;
4934
4935         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4936
4937         priv->ieee_channels = channels;
4938         priv->ieee_rates = rates;
4939
4940         iwl4965_init_hw_rates(priv, rates);
4941
4942         for (i = 0;  i < priv->channel_count; i++) {
4943                 ch = &priv->channel_info[i];
4944
4945                 /* FIXME: might be removed if scan is OK */
4946                 if (!is_channel_valid(ch))
4947                         continue;
4948
4949                 if (is_channel_a_band(ch))
4950                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4951                 else
4952                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4953
4954                 geo_ch = &sband->channels[sband->n_channels++];
4955
4956                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4957                 geo_ch->max_power = ch->max_power_avg;
4958                 geo_ch->max_antenna_gain = 0xff;
4959                 geo_ch->hw_value = ch->channel;
4960
4961                 if (is_channel_valid(ch)) {
4962                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4963                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4964
4965                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4966                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4967
4968                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4969                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4970
4971                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4972                                 priv->max_channel_txpower_limit =
4973                                     ch->max_power_avg;
4974                 } else {
4975                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4976                 }
4977
4978                 /* Save flags for reg domain usage */
4979                 geo_ch->orig_flags = geo_ch->flags;
4980
4981                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4982                                 ch->channel, geo_ch->center_freq,
4983                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4984                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4985                                 "restricted" : "valid",
4986                                  geo_ch->flags);
4987         }
4988
4989         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4990              priv->cfg->sku & IWL_SKU_A) {
4991                 printk(KERN_INFO DRV_NAME
4992                        ": Incorrectly detected BG card as ABG.  Please send "
4993                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4994                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4995                 priv->cfg->sku &= ~IWL_SKU_A;
4996         }
4997
4998         printk(KERN_INFO DRV_NAME
4999                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5000                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5001                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5002
5003         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5004                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5005                         &priv->bands[IEEE80211_BAND_2GHZ];
5006         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5007                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5008                         &priv->bands[IEEE80211_BAND_5GHZ];
5009
5010         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5011
5012         return 0;
5013 }
5014
5015 /*
5016  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5017  */
5018 void iwl4965_free_geos(struct iwl_priv *priv)
5019 {
5020         kfree(priv->ieee_channels);
5021         kfree(priv->ieee_rates);
5022         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5023 }
5024
5025 /******************************************************************************
5026  *
5027  * uCode download functions
5028  *
5029  ******************************************************************************/
5030
5031 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
5032 {
5033         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5034         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5035         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5036         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5037         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5038         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5039 }
5040
5041 /**
5042  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5043  *     looking at all data.
5044  */
5045 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
5046                                  u32 len)
5047 {
5048         u32 val;
5049         u32 save_len = len;
5050         int rc = 0;
5051         u32 errcnt;
5052
5053         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5054
5055         rc = iwl_grab_nic_access(priv);
5056         if (rc)
5057                 return rc;
5058
5059         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5060
5061         errcnt = 0;
5062         for (; len > 0; len -= sizeof(u32), image++) {
5063                 /* read data comes through single port, auto-incr addr */
5064                 /* NOTE: Use the debugless read so we don't flood kernel log
5065                  * if IWL_DL_IO is set */
5066                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5067                 if (val != le32_to_cpu(*image)) {
5068                         IWL_ERROR("uCode INST section is invalid at "
5069                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5070                                   save_len - len, val, le32_to_cpu(*image));
5071                         rc = -EIO;
5072                         errcnt++;
5073                         if (errcnt >= 20)
5074                                 break;
5075                 }
5076         }
5077
5078         iwl_release_nic_access(priv);
5079
5080         if (!errcnt)
5081                 IWL_DEBUG_INFO
5082                     ("ucode image in INSTRUCTION memory is good\n");
5083
5084         return rc;
5085 }
5086
5087
5088 /**
5089  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
5090  *   using sample data 100 bytes apart.  If these sample points are good,
5091  *   it's a pretty good bet that everything between them is good, too.
5092  */
5093 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5094 {
5095         u32 val;
5096         int rc = 0;
5097         u32 errcnt = 0;
5098         u32 i;
5099
5100         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5101
5102         rc = iwl_grab_nic_access(priv);
5103         if (rc)
5104                 return rc;
5105
5106         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5107                 /* read data comes through single port, auto-incr addr */
5108                 /* NOTE: Use the debugless read so we don't flood kernel log
5109                  * if IWL_DL_IO is set */
5110                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5111                         i + RTC_INST_LOWER_BOUND);
5112                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5113                 if (val != le32_to_cpu(*image)) {
5114 #if 0 /* Enable this if you want to see details */
5115                         IWL_ERROR("uCode INST section is invalid at "
5116                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5117                                   i, val, *image);
5118 #endif
5119                         rc = -EIO;
5120                         errcnt++;
5121                         if (errcnt >= 3)
5122                                 break;
5123                 }
5124         }
5125
5126         iwl_release_nic_access(priv);
5127
5128         return rc;
5129 }
5130
5131
5132 /**
5133  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
5134  *    and verify its contents
5135  */
5136 static int iwl4965_verify_ucode(struct iwl_priv *priv)
5137 {
5138         __le32 *image;
5139         u32 len;
5140         int rc = 0;
5141
5142         /* Try bootstrap */
5143         image = (__le32 *)priv->ucode_boot.v_addr;
5144         len = priv->ucode_boot.len;
5145         rc = iwl4965_verify_inst_sparse(priv, image, len);
5146         if (rc == 0) {
5147                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5148                 return 0;
5149         }
5150
5151         /* Try initialize */
5152         image = (__le32 *)priv->ucode_init.v_addr;
5153         len = priv->ucode_init.len;
5154         rc = iwl4965_verify_inst_sparse(priv, image, len);
5155         if (rc == 0) {
5156                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5157                 return 0;
5158         }
5159
5160         /* Try runtime/protocol */
5161         image = (__le32 *)priv->ucode_code.v_addr;
5162         len = priv->ucode_code.len;
5163         rc = iwl4965_verify_inst_sparse(priv, image, len);
5164         if (rc == 0) {
5165                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5166                 return 0;
5167         }
5168
5169         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5170
5171         /* Since nothing seems to match, show first several data entries in
5172          * instruction SRAM, so maybe visual inspection will give a clue.
5173          * Selection of bootstrap image (vs. other images) is arbitrary. */
5174         image = (__le32 *)priv->ucode_boot.v_addr;
5175         len = priv->ucode_boot.len;
5176         rc = iwl4965_verify_inst_full(priv, image, len);
5177
5178         return rc;
5179 }
5180
5181 static void iwl4965_nic_start(struct iwl_priv *priv)
5182 {
5183         /* Remove all resets to allow NIC to operate */
5184         iwl_write32(priv, CSR_RESET, 0);
5185 }
5186
5187
5188 /**
5189  * iwl4965_read_ucode - Read uCode images from disk file.
5190  *
5191  * Copy into buffers for card to fetch via bus-mastering
5192  */
5193 static int iwl4965_read_ucode(struct iwl_priv *priv)
5194 {
5195         struct iwl4965_ucode *ucode;
5196         int ret;
5197         const struct firmware *ucode_raw;
5198         const char *name = priv->cfg->fw_name;
5199         u8 *src;
5200         size_t len;
5201         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5202
5203         /* Ask kernel firmware_class module to get the boot firmware off disk.
5204          * request_firmware() is synchronous, file is in memory on return. */
5205         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5206         if (ret < 0) {
5207                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5208                                         name, ret);
5209                 goto error;
5210         }
5211
5212         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5213                        name, ucode_raw->size);
5214
5215         /* Make sure that we got at least our header! */
5216         if (ucode_raw->size < sizeof(*ucode)) {
5217                 IWL_ERROR("File size way too small!\n");
5218                 ret = -EINVAL;
5219                 goto err_release;
5220         }
5221
5222         /* Data from ucode file:  header followed by uCode images */
5223         ucode = (void *)ucode_raw->data;
5224
5225         ver = le32_to_cpu(ucode->ver);
5226         inst_size = le32_to_cpu(ucode->inst_size);
5227         data_size = le32_to_cpu(ucode->data_size);
5228         init_size = le32_to_cpu(ucode->init_size);
5229         init_data_size = le32_to_cpu(ucode->init_data_size);
5230         boot_size = le32_to_cpu(ucode->boot_size);
5231
5232         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5233         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5234                        inst_size);
5235         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5236                        data_size);
5237         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5238                        init_size);
5239         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5240                        init_data_size);
5241         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5242                        boot_size);
5243
5244         /* Verify size of file vs. image size info in file's header */
5245         if (ucode_raw->size < sizeof(*ucode) +
5246                 inst_size + data_size + init_size +
5247                 init_data_size + boot_size) {
5248
5249                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5250                                (int)ucode_raw->size);
5251                 ret = -EINVAL;
5252                 goto err_release;
5253         }
5254
5255         /* Verify that uCode images will fit in card's SRAM */
5256         if (inst_size > IWL_MAX_INST_SIZE) {
5257                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5258                                inst_size);
5259                 ret = -EINVAL;
5260                 goto err_release;
5261         }
5262
5263         if (data_size > IWL_MAX_DATA_SIZE) {
5264                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5265                                 data_size);
5266                 ret = -EINVAL;
5267                 goto err_release;
5268         }
5269         if (init_size > IWL_MAX_INST_SIZE) {
5270                 IWL_DEBUG_INFO
5271                     ("uCode init instr len %d too large to fit in\n",
5272                       init_size);
5273                 ret = -EINVAL;
5274                 goto err_release;
5275         }
5276         if (init_data_size > IWL_MAX_DATA_SIZE) {
5277                 IWL_DEBUG_INFO
5278                     ("uCode init data len %d too large to fit in\n",
5279                       init_data_size);
5280                 ret = -EINVAL;
5281                 goto err_release;
5282         }
5283         if (boot_size > IWL_MAX_BSM_SIZE) {
5284                 IWL_DEBUG_INFO
5285                     ("uCode boot instr len %d too large to fit in\n",
5286                       boot_size);
5287                 ret = -EINVAL;
5288                 goto err_release;
5289         }
5290
5291         /* Allocate ucode buffers for card's bus-master loading ... */
5292
5293         /* Runtime instructions and 2 copies of data:
5294          * 1) unmodified from disk
5295          * 2) backup cache for save/restore during power-downs */
5296         priv->ucode_code.len = inst_size;
5297         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5298
5299         priv->ucode_data.len = data_size;
5300         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5301
5302         priv->ucode_data_backup.len = data_size;
5303         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5304
5305         /* Initialization instructions and data */
5306         if (init_size && init_data_size) {
5307                 priv->ucode_init.len = init_size;
5308                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5309
5310                 priv->ucode_init_data.len = init_data_size;
5311                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5312
5313                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5314                         goto err_pci_alloc;
5315         }
5316
5317         /* Bootstrap (instructions only, no data) */
5318         if (boot_size) {
5319                 priv->ucode_boot.len = boot_size;
5320                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5321
5322                 if (!priv->ucode_boot.v_addr)
5323                         goto err_pci_alloc;
5324         }
5325
5326         /* Copy images into buffers for card's bus-master reads ... */
5327
5328         /* Runtime instructions (first block of data in file) */
5329         src = &ucode->data[0];
5330         len = priv->ucode_code.len;
5331         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5332         memcpy(priv->ucode_code.v_addr, src, len);
5333         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5334                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5335
5336         /* Runtime data (2nd block)
5337          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
5338         src = &ucode->data[inst_size];
5339         len = priv->ucode_data.len;
5340         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5341         memcpy(priv->ucode_data.v_addr, src, len);
5342         memcpy(priv->ucode_data_backup.v_addr, src, len);
5343
5344         /* Initialization instructions (3rd block) */
5345         if (init_size) {
5346                 src = &ucode->data[inst_size + data_size];
5347                 len = priv->ucode_init.len;
5348                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5349                                 len);
5350                 memcpy(priv->ucode_init.v_addr, src, len);
5351         }
5352
5353         /* Initialization data (4th block) */
5354         if (init_data_size) {
5355                 src = &ucode->data[inst_size + data_size + init_size];
5356                 len = priv->ucode_init_data.len;
5357                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
5358                                len);
5359                 memcpy(priv->ucode_init_data.v_addr, src, len);
5360         }
5361
5362         /* Bootstrap instructions (5th block) */
5363         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5364         len = priv->ucode_boot.len;
5365         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5366         memcpy(priv->ucode_boot.v_addr, src, len);
5367
5368         /* We have our copies now, allow OS release its copies */
5369         release_firmware(ucode_raw);
5370         return 0;
5371
5372  err_pci_alloc:
5373         IWL_ERROR("failed to allocate pci memory\n");
5374         ret = -ENOMEM;
5375         iwl4965_dealloc_ucode_pci(priv);
5376
5377  err_release:
5378         release_firmware(ucode_raw);
5379
5380  error:
5381         return ret;
5382 }
5383
5384
5385 /**
5386  * iwl4965_set_ucode_ptrs - Set uCode address location
5387  *
5388  * Tell initialization uCode where to find runtime uCode.
5389  *
5390  * BSM registers initially contain pointers to initialization uCode.
5391  * We need to replace them to load runtime uCode inst and data,
5392  * and to save runtime data when powering down.
5393  */
5394 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5395 {
5396         dma_addr_t pinst;
5397         dma_addr_t pdata;
5398         int rc = 0;
5399         unsigned long flags;
5400
5401         /* bits 35:4 for 4965 */
5402         pinst = priv->ucode_code.p_addr >> 4;
5403         pdata = priv->ucode_data_backup.p_addr >> 4;
5404
5405         spin_lock_irqsave(&priv->lock, flags);
5406         rc = iwl_grab_nic_access(priv);
5407         if (rc) {
5408                 spin_unlock_irqrestore(&priv->lock, flags);
5409                 return rc;
5410         }
5411
5412         /* Tell bootstrap uCode where to find image to load */
5413         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5414         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5415         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5416                                  priv->ucode_data.len);
5417
5418         /* Inst bytecount must be last to set up, bit 31 signals uCode
5419          *   that all new ptr/size info is in place */
5420         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5421                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5422
5423         iwl_release_nic_access(priv);
5424
5425         spin_unlock_irqrestore(&priv->lock, flags);
5426
5427         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5428
5429         return rc;
5430 }
5431
5432 /**
5433  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5434  *
5435  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5436  *
5437  * The 4965 "initialize" ALIVE reply contains calibration data for:
5438  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
5439  *   (3945 does not contain this data).
5440  *
5441  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5442 */
5443 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5444 {
5445         /* Check alive response for "valid" sign from uCode */
5446         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5447                 /* We had an error bringing up the hardware, so take it
5448                  * all the way back down so we can try again */
5449                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5450                 goto restart;
5451         }
5452
5453         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5454          * This is a paranoid check, because we would not have gotten the
5455          * "initialize" alive if code weren't properly loaded.  */
5456         if (iwl4965_verify_ucode(priv)) {
5457                 /* Runtime instruction load was bad;
5458                  * take it all the way back down so we can try again */
5459                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5460                 goto restart;
5461         }
5462
5463         /* Calculate temperature */
5464         priv->temperature = iwl4965_get_temperature(priv);
5465
5466         /* Send pointers to protocol/runtime uCode image ... init code will
5467          * load and launch runtime uCode, which will send us another "Alive"
5468          * notification. */
5469         IWL_DEBUG_INFO("Initialization Alive received.\n");
5470         if (iwl4965_set_ucode_ptrs(priv)) {
5471                 /* Runtime instruction load won't happen;
5472                  * take it all the way back down so we can try again */
5473                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5474                 goto restart;
5475         }
5476         return;
5477
5478  restart:
5479         queue_work(priv->workqueue, &priv->restart);
5480 }
5481
5482
5483 /**
5484  * iwl4965_alive_start - called after REPLY_ALIVE notification received
5485  *                   from protocol/runtime uCode (initialization uCode's
5486  *                   Alive gets handled by iwl4965_init_alive_start()).
5487  */
5488 static void iwl4965_alive_start(struct iwl_priv *priv)
5489 {
5490         int ret = 0;
5491
5492         IWL_DEBUG_INFO("Runtime Alive received.\n");
5493
5494         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5495                 /* We had an error bringing up the hardware, so take it
5496                  * all the way back down so we can try again */
5497                 IWL_DEBUG_INFO("Alive failed.\n");
5498                 goto restart;
5499         }
5500
5501         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5502          * This is a paranoid check, because we would not have gotten the
5503          * "runtime" alive if code weren't properly loaded.  */
5504         if (iwl4965_verify_ucode(priv)) {
5505                 /* Runtime instruction load was bad;
5506                  * take it all the way back down so we can try again */
5507                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5508                 goto restart;
5509         }
5510
5511         iwlcore_clear_stations_table(priv);
5512
5513         ret = priv->cfg->ops->lib->alive_notify(priv);
5514         if (ret) {
5515                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5516                             ret);
5517                 goto restart;
5518         }
5519
5520         /* After the ALIVE response, we can send host commands to 4965 uCode */
5521         set_bit(STATUS_ALIVE, &priv->status);
5522
5523         /* Clear out the uCode error bit if it is set */
5524         clear_bit(STATUS_FW_ERROR, &priv->status);
5525
5526         if (iwl_is_rfkill(priv))
5527                 return;
5528
5529         ieee80211_start_queues(priv->hw);
5530
5531         priv->active_rate = priv->rates_mask;
5532         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5533
5534         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5535
5536         if (iwl_is_associated(priv)) {
5537                 struct iwl4965_rxon_cmd *active_rxon =
5538                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5539
5540                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5541                        sizeof(priv->staging_rxon));
5542                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5543         } else {
5544                 /* Initialize our rx_config data */
5545                 iwl4965_connection_init_rx_config(priv);
5546                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5547         }
5548
5549         /* Configure Bluetooth device coexistence support */
5550         iwl4965_send_bt_config(priv);
5551
5552         /* Configure the adapter for unassociated operation */
5553         iwl4965_commit_rxon(priv);
5554
5555         /* At this point, the NIC is initialized and operational */
5556         priv->notif_missed_beacons = 0;
5557
5558         iwl4965_rf_kill_ct_config(priv);
5559
5560         iwl_leds_register(priv);
5561
5562         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5563         set_bit(STATUS_READY, &priv->status);
5564         wake_up_interruptible(&priv->wait_command_queue);
5565
5566         if (priv->error_recovering)
5567                 iwl4965_error_recovery(priv);
5568
5569         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5570         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5571         return;
5572
5573  restart:
5574         queue_work(priv->workqueue, &priv->restart);
5575 }
5576
5577 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5578
5579 static void __iwl4965_down(struct iwl_priv *priv)
5580 {
5581         unsigned long flags;
5582         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5583         struct ieee80211_conf *conf = NULL;
5584
5585         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5586
5587         conf = ieee80211_get_hw_conf(priv->hw);
5588
5589         if (!exit_pending)
5590                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5591
5592         iwl_leds_unregister(priv);
5593
5594         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5595
5596         iwlcore_clear_stations_table(priv);
5597
5598         /* Unblock any waiting calls */
5599         wake_up_interruptible_all(&priv->wait_command_queue);
5600
5601         /* Wipe out the EXIT_PENDING status bit if we are not actually
5602          * exiting the module */
5603         if (!exit_pending)
5604                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5605
5606         /* stop and reset the on-board processor */
5607         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5608
5609         /* tell the device to stop sending interrupts */
5610         spin_lock_irqsave(&priv->lock, flags);
5611         iwl4965_disable_interrupts(priv);
5612         spin_unlock_irqrestore(&priv->lock, flags);
5613         iwl_synchronize_irq(priv);
5614
5615         if (priv->mac80211_registered)
5616                 ieee80211_stop_queues(priv->hw);
5617
5618         /* If we have not previously called iwl4965_init() then
5619          * clear all bits but the RF Kill and SUSPEND bits and return */
5620         if (!iwl_is_init(priv)) {
5621                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5622                                         STATUS_RF_KILL_HW |
5623                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5624                                         STATUS_RF_KILL_SW |
5625                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5626                                         STATUS_GEO_CONFIGURED |
5627                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5628                                         STATUS_IN_SUSPEND;
5629                 goto exit;
5630         }
5631
5632         /* ...otherwise clear out all the status bits but the RF Kill and
5633          * SUSPEND bits and continue taking the NIC down. */
5634         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5635                                 STATUS_RF_KILL_HW |
5636                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5637                                 STATUS_RF_KILL_SW |
5638                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5639                                 STATUS_GEO_CONFIGURED |
5640                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5641                                 STATUS_IN_SUSPEND |
5642                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5643                                 STATUS_FW_ERROR;
5644
5645         spin_lock_irqsave(&priv->lock, flags);
5646         iwl_clear_bit(priv, CSR_GP_CNTRL,
5647                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5648         spin_unlock_irqrestore(&priv->lock, flags);
5649
5650         iwl4965_hw_txq_ctx_stop(priv);
5651         iwl4965_hw_rxq_stop(priv);
5652
5653         spin_lock_irqsave(&priv->lock, flags);
5654         if (!iwl_grab_nic_access(priv)) {
5655                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5656                                          APMG_CLK_VAL_DMA_CLK_RQT);
5657                 iwl_release_nic_access(priv);
5658         }
5659         spin_unlock_irqrestore(&priv->lock, flags);
5660
5661         udelay(5);
5662
5663         iwl4965_hw_nic_stop_master(priv);
5664         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5665         iwl4965_hw_nic_reset(priv);
5666
5667  exit:
5668         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5669
5670         if (priv->ibss_beacon)
5671                 dev_kfree_skb(priv->ibss_beacon);
5672         priv->ibss_beacon = NULL;
5673
5674         /* clear out any free frames */
5675         iwl4965_clear_free_frames(priv);
5676 }
5677
5678 static void iwl4965_down(struct iwl_priv *priv)
5679 {
5680         mutex_lock(&priv->mutex);
5681         __iwl4965_down(priv);
5682         mutex_unlock(&priv->mutex);
5683
5684         iwl4965_cancel_deferred_work(priv);
5685 }
5686
5687 #define MAX_HW_RESTARTS 5
5688
5689 static int __iwl4965_up(struct iwl_priv *priv)
5690 {
5691         int i;
5692         int ret;
5693
5694         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5695                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5696                 return -EIO;
5697         }
5698
5699         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5700                 IWL_WARNING("Radio disabled by SW RF kill (module "
5701                             "parameter)\n");
5702                 iwl_rfkill_set_hw_state(priv);
5703                 return -ENODEV;
5704         }
5705
5706         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5707                 IWL_ERROR("ucode not available for device bringup\n");
5708                 return -EIO;
5709         }
5710
5711         /* If platform's RF_KILL switch is NOT set to KILL */
5712         if (iwl_read32(priv, CSR_GP_CNTRL) &
5713                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5714                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5715         else {
5716                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5717                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5718                         iwl_rfkill_set_hw_state(priv);
5719                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5720                         return -ENODEV;
5721                 }
5722         }
5723
5724         iwl_rfkill_set_hw_state(priv);
5725         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5726
5727         ret = priv->cfg->ops->lib->hw_nic_init(priv);
5728         if (ret) {
5729                 IWL_ERROR("Unable to init nic\n");
5730                 return ret;
5731         }
5732
5733         /* make sure rfkill handshake bits are cleared */
5734         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5735         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5736                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5737
5738         /* clear (again), then enable host interrupts */
5739         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5740         iwl4965_enable_interrupts(priv);
5741
5742         /* really make sure rfkill handshake bits are cleared */
5743         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5744         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5745
5746         /* Copy original ucode data image from disk into backup cache.
5747          * This will be used to initialize the on-board processor's
5748          * data SRAM for a clean start when the runtime program first loads. */
5749         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5750                priv->ucode_data.len);
5751
5752         /* We return success when we resume from suspend and rf_kill is on. */
5753         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5754                 return 0;
5755
5756         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5757
5758                 iwlcore_clear_stations_table(priv);
5759
5760                 /* load bootstrap state machine,
5761                  * load bootstrap program into processor's memory,
5762                  * prepare to load the "initialize" uCode */
5763                 ret = priv->cfg->ops->lib->load_ucode(priv);
5764
5765                 if (ret) {
5766                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5767                         continue;
5768                 }
5769
5770                 /* start card; "initialize" will load runtime ucode */
5771                 iwl4965_nic_start(priv);
5772
5773                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5774
5775                 return 0;
5776         }
5777
5778         set_bit(STATUS_EXIT_PENDING, &priv->status);
5779         __iwl4965_down(priv);
5780
5781         /* tried to restart and config the device for as long as our
5782          * patience could withstand */
5783         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5784         return -EIO;
5785 }
5786
5787
5788 /*****************************************************************************
5789  *
5790  * Workqueue callbacks
5791  *
5792  *****************************************************************************/
5793
5794 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5795 {
5796         struct iwl_priv *priv =
5797             container_of(data, struct iwl_priv, init_alive_start.work);
5798
5799         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5800                 return;
5801
5802         mutex_lock(&priv->mutex);
5803         iwl4965_init_alive_start(priv);
5804         mutex_unlock(&priv->mutex);
5805 }
5806
5807 static void iwl4965_bg_alive_start(struct work_struct *data)
5808 {
5809         struct iwl_priv *priv =
5810             container_of(data, struct iwl_priv, alive_start.work);
5811
5812         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5813                 return;
5814
5815         mutex_lock(&priv->mutex);
5816         iwl4965_alive_start(priv);
5817         mutex_unlock(&priv->mutex);
5818 }
5819
5820 static void iwl4965_bg_rf_kill(struct work_struct *work)
5821 {
5822         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5823
5824         wake_up_interruptible(&priv->wait_command_queue);
5825
5826         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5827                 return;
5828
5829         mutex_lock(&priv->mutex);
5830
5831         if (!iwl_is_rfkill(priv)) {
5832                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5833                           "HW and/or SW RF Kill no longer active, restarting "
5834                           "device\n");
5835                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5836                         queue_work(priv->workqueue, &priv->restart);
5837         } else {
5838                 /* make sure mac80211 stop sending Tx frame */
5839                 if (priv->mac80211_registered)
5840                         ieee80211_stop_queues(priv->hw);
5841
5842                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5843                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5844                                           "disabled by SW switch\n");
5845                 else
5846                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5847                                     "Kill switch must be turned off for "
5848                                     "wireless networking to work.\n");
5849         }
5850         iwl_rfkill_set_hw_state(priv);
5851
5852         mutex_unlock(&priv->mutex);
5853 }
5854
5855 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5856
5857 static void iwl4965_bg_scan_check(struct work_struct *data)
5858 {
5859         struct iwl_priv *priv =
5860             container_of(data, struct iwl_priv, scan_check.work);
5861
5862         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5863                 return;
5864
5865         mutex_lock(&priv->mutex);
5866         if (test_bit(STATUS_SCANNING, &priv->status) ||
5867             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5868                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5869                           "Scan completion watchdog resetting adapter (%dms)\n",
5870                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5871
5872                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5873                         iwl4965_send_scan_abort(priv);
5874         }
5875         mutex_unlock(&priv->mutex);
5876 }
5877
5878 static void iwl4965_bg_request_scan(struct work_struct *data)
5879 {
5880         struct iwl_priv *priv =
5881             container_of(data, struct iwl_priv, request_scan);
5882         struct iwl_host_cmd cmd = {
5883                 .id = REPLY_SCAN_CMD,
5884                 .len = sizeof(struct iwl4965_scan_cmd),
5885                 .meta.flags = CMD_SIZE_HUGE,
5886         };
5887         struct iwl4965_scan_cmd *scan;
5888         struct ieee80211_conf *conf = NULL;
5889         u16 cmd_len;
5890         enum ieee80211_band band;
5891         u8 direct_mask;
5892         int ret = 0;
5893
5894         conf = ieee80211_get_hw_conf(priv->hw);
5895
5896         mutex_lock(&priv->mutex);
5897
5898         if (!iwl_is_ready(priv)) {
5899                 IWL_WARNING("request scan called when driver not ready.\n");
5900                 goto done;
5901         }
5902
5903         /* Make sure the scan wasn't cancelled before this queued work
5904          * was given the chance to run... */
5905         if (!test_bit(STATUS_SCANNING, &priv->status))
5906                 goto done;
5907
5908         /* This should never be called or scheduled if there is currently
5909          * a scan active in the hardware. */
5910         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5911                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5912                                "Ignoring second request.\n");
5913                 ret = -EIO;
5914                 goto done;
5915         }
5916
5917         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5918                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5919                 goto done;
5920         }
5921
5922         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5923                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5924                 goto done;
5925         }
5926
5927         if (iwl_is_rfkill(priv)) {
5928                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5929                 goto done;
5930         }
5931
5932         if (!test_bit(STATUS_READY, &priv->status)) {
5933                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5934                 goto done;
5935         }
5936
5937         if (!priv->scan_bands) {
5938                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5939                 goto done;
5940         }
5941
5942         if (!priv->scan) {
5943                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5944                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5945                 if (!priv->scan) {
5946                         ret = -ENOMEM;
5947                         goto done;
5948                 }
5949         }
5950         scan = priv->scan;
5951         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5952
5953         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5954         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5955
5956         if (iwl_is_associated(priv)) {
5957                 u16 interval = 0;
5958                 u32 extra;
5959                 u32 suspend_time = 100;
5960                 u32 scan_suspend_time = 100;
5961                 unsigned long flags;
5962
5963                 IWL_DEBUG_INFO("Scanning while associated...\n");
5964
5965                 spin_lock_irqsave(&priv->lock, flags);
5966                 interval = priv->beacon_int;
5967                 spin_unlock_irqrestore(&priv->lock, flags);
5968
5969                 scan->suspend_time = 0;
5970                 scan->max_out_time = cpu_to_le32(200 * 1024);
5971                 if (!interval)
5972                         interval = suspend_time;
5973
5974                 extra = (suspend_time / interval) << 22;
5975                 scan_suspend_time = (extra |
5976                     ((suspend_time % interval) * 1024));
5977                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5978                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5979                                scan_suspend_time, interval);
5980         }
5981
5982         /* We should add the ability for user to lock to PASSIVE ONLY */
5983         if (priv->one_direct_scan) {
5984                 IWL_DEBUG_SCAN
5985                     ("Kicking off one direct scan for '%s'\n",
5986                      iwl4965_escape_essid(priv->direct_ssid,
5987                                       priv->direct_ssid_len));
5988                 scan->direct_scan[0].id = WLAN_EID_SSID;
5989                 scan->direct_scan[0].len = priv->direct_ssid_len;
5990                 memcpy(scan->direct_scan[0].ssid,
5991                        priv->direct_ssid, priv->direct_ssid_len);
5992                 direct_mask = 1;
5993         } else if (!iwl_is_associated(priv) && priv->essid_len) {
5994                 scan->direct_scan[0].id = WLAN_EID_SSID;
5995                 scan->direct_scan[0].len = priv->essid_len;
5996                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5997                 direct_mask = 1;
5998         } else {
5999                 direct_mask = 0;
6000         }
6001
6002         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6003         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6004         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6005
6006
6007         switch (priv->scan_bands) {
6008         case 2:
6009                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6010                 scan->tx_cmd.rate_n_flags =
6011                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6012                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6013
6014                 scan->good_CRC_th = 0;
6015                 band = IEEE80211_BAND_2GHZ;
6016                 break;
6017
6018         case 1:
6019                 scan->tx_cmd.rate_n_flags =
6020                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6021                                 RATE_MCS_ANT_B_MSK);
6022                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6023                 band = IEEE80211_BAND_5GHZ;
6024                 break;
6025
6026         default:
6027                 IWL_WARNING("Invalid scan band count\n");
6028                 goto done;
6029         }
6030
6031         /* We don't build a direct scan probe request; the uCode will do
6032          * that based on the direct_mask added to each channel entry */
6033         cmd_len = iwl4965_fill_probe_req(priv, band,
6034                                         (struct ieee80211_mgmt *)scan->data,
6035                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
6036
6037         scan->tx_cmd.len = cpu_to_le16(cmd_len);
6038         /* select Rx chains */
6039
6040         /* Force use of chains B and C (0x6) for scan Rx.
6041          * Avoid A (0x1) because of its off-channel reception on A-band.
6042          * MIMO is not used here, but value is required to make uCode happy. */
6043         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
6044                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
6045                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
6046                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
6047
6048         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6049                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6050
6051         if (direct_mask) {
6052                 IWL_DEBUG_SCAN
6053                     ("Initiating direct scan for %s.\n",
6054                      iwl4965_escape_essid(priv->essid, priv->essid_len));
6055                 scan->channel_count =
6056                         iwl4965_get_channels_for_scan(
6057                                 priv, band, 1, /* active */
6058                                 direct_mask,
6059                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6060         } else {
6061                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6062                 scan->channel_count =
6063                         iwl4965_get_channels_for_scan(
6064                                 priv, band, 0, /* passive */
6065                                 direct_mask,
6066                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6067         }
6068
6069         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6070             scan->channel_count * sizeof(struct iwl4965_scan_channel);
6071         cmd.data = scan;
6072         scan->len = cpu_to_le16(cmd.len);
6073
6074         set_bit(STATUS_SCAN_HW, &priv->status);
6075         ret = iwl_send_cmd_sync(priv, &cmd);
6076         if (ret)
6077                 goto done;
6078
6079         queue_delayed_work(priv->workqueue, &priv->scan_check,
6080                            IWL_SCAN_CHECK_WATCHDOG);
6081
6082         mutex_unlock(&priv->mutex);
6083         return;
6084
6085  done:
6086         /* inform mac80211 scan aborted */
6087         queue_work(priv->workqueue, &priv->scan_completed);
6088         mutex_unlock(&priv->mutex);
6089 }
6090
6091 static void iwl4965_bg_up(struct work_struct *data)
6092 {
6093         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6094
6095         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6096                 return;
6097
6098         mutex_lock(&priv->mutex);
6099         __iwl4965_up(priv);
6100         mutex_unlock(&priv->mutex);
6101 }
6102
6103 static void iwl4965_bg_restart(struct work_struct *data)
6104 {
6105         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6106
6107         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6108                 return;
6109
6110         iwl4965_down(priv);
6111         queue_work(priv->workqueue, &priv->up);
6112 }
6113
6114 static void iwl4965_bg_rx_replenish(struct work_struct *data)
6115 {
6116         struct iwl_priv *priv =
6117             container_of(data, struct iwl_priv, rx_replenish);
6118
6119         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6120                 return;
6121
6122         mutex_lock(&priv->mutex);
6123         iwl4965_rx_replenish(priv);
6124         mutex_unlock(&priv->mutex);
6125 }
6126
6127 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6128
6129 static void iwl4965_bg_post_associate(struct work_struct *data)
6130 {
6131         struct iwl_priv *priv = container_of(data, struct iwl_priv,
6132                                              post_associate.work);
6133         struct ieee80211_conf *conf = NULL;
6134         int ret = 0;
6135         DECLARE_MAC_BUF(mac);
6136
6137         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6138                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6139                 return;
6140         }
6141
6142         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6143                         priv->assoc_id,
6144                         print_mac(mac, priv->active_rxon.bssid_addr));
6145
6146
6147         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6148                 return;
6149
6150         mutex_lock(&priv->mutex);
6151
6152         if (!priv->vif || !priv->is_open) {
6153                 mutex_unlock(&priv->mutex);
6154                 return;
6155         }
6156         iwl4965_scan_cancel_timeout(priv, 200);
6157
6158         conf = ieee80211_get_hw_conf(priv->hw);
6159
6160         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6161         iwl4965_commit_rxon(priv);
6162
6163         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6164         iwl4965_setup_rxon_timing(priv);
6165         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6166                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6167         if (ret)
6168                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6169                             "Attempting to continue.\n");
6170
6171         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6172
6173 #ifdef CONFIG_IWL4965_HT
6174         if (priv->current_ht_config.is_ht)
6175                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
6176 #endif /* CONFIG_IWL4965_HT*/
6177         iwl4965_set_rxon_chain(priv);
6178         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6179
6180         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6181                         priv->assoc_id, priv->beacon_int);
6182
6183         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6184                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6185         else
6186                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6187
6188         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6189                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6190                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6191                 else
6192                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6193
6194                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6195                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6196
6197         }
6198
6199         iwl4965_commit_rxon(priv);
6200
6201         switch (priv->iw_mode) {
6202         case IEEE80211_IF_TYPE_STA:
6203                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6204                 break;
6205
6206         case IEEE80211_IF_TYPE_IBSS:
6207
6208                 /* clear out the station table */
6209                 iwlcore_clear_stations_table(priv);
6210
6211                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6212                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6213                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6214                 iwl4965_send_beacon_cmd(priv);
6215
6216                 break;
6217
6218         default:
6219                 IWL_ERROR("%s Should not be called in %d mode\n",
6220                                 __FUNCTION__, priv->iw_mode);
6221                 break;
6222         }
6223
6224         iwl4965_sequence_reset(priv);
6225
6226 #ifdef CONFIG_IWL4965_SENSITIVITY
6227         /* Enable Rx differential gain and sensitivity calibrations */
6228         iwl4965_chain_noise_reset(priv);
6229         priv->start_calib = 1;
6230 #endif /* CONFIG_IWL4965_SENSITIVITY */
6231
6232         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6233                 priv->assoc_station_added = 1;
6234
6235         iwl4965_activate_qos(priv, 0);
6236
6237         /* we have just associated, don't start scan too early */
6238         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6239         mutex_unlock(&priv->mutex);
6240 }
6241
6242 static void iwl4965_bg_abort_scan(struct work_struct *work)
6243 {
6244         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6245
6246         if (!iwl_is_ready(priv))
6247                 return;
6248
6249         mutex_lock(&priv->mutex);
6250
6251         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6252         iwl4965_send_scan_abort(priv);
6253
6254         mutex_unlock(&priv->mutex);
6255 }
6256
6257 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6258
6259 static void iwl4965_bg_scan_completed(struct work_struct *work)
6260 {
6261         struct iwl_priv *priv =
6262             container_of(work, struct iwl_priv, scan_completed);
6263
6264         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6265
6266         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6267                 return;
6268
6269         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6270                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6271
6272         ieee80211_scan_completed(priv->hw);
6273
6274         /* Since setting the TXPOWER may have been deferred while
6275          * performing the scan, fire one off */
6276         mutex_lock(&priv->mutex);
6277         iwl4965_hw_reg_send_txpower(priv);
6278         mutex_unlock(&priv->mutex);
6279 }
6280
6281 /*****************************************************************************
6282  *
6283  * mac80211 entry point functions
6284  *
6285  *****************************************************************************/
6286
6287 #define UCODE_READY_TIMEOUT     (2 * HZ)
6288
6289 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6290 {
6291         struct iwl_priv *priv = hw->priv;
6292         int ret;
6293
6294         IWL_DEBUG_MAC80211("enter\n");
6295
6296         if (pci_enable_device(priv->pci_dev)) {
6297                 IWL_ERROR("Fail to pci_enable_device\n");
6298                 return -ENODEV;
6299         }
6300         pci_restore_state(priv->pci_dev);
6301         pci_enable_msi(priv->pci_dev);
6302
6303         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
6304                           DRV_NAME, priv);
6305         if (ret) {
6306                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6307                 goto out_disable_msi;
6308         }
6309
6310         /* we should be verifying the device is ready to be opened */
6311         mutex_lock(&priv->mutex);
6312
6313         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
6314         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6315          * ucode filename and max sizes are card-specific. */
6316
6317         if (!priv->ucode_code.len) {
6318                 ret = iwl4965_read_ucode(priv);
6319                 if (ret) {
6320                         IWL_ERROR("Could not read microcode: %d\n", ret);
6321                         mutex_unlock(&priv->mutex);
6322                         goto out_release_irq;
6323                 }
6324         }
6325
6326         ret = __iwl4965_up(priv);
6327
6328         mutex_unlock(&priv->mutex);
6329
6330         if (ret)
6331                 goto out_release_irq;
6332
6333         IWL_DEBUG_INFO("Start UP work done.\n");
6334
6335         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6336                 return 0;
6337
6338         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6339          * mac80211 will not be run successfully. */
6340         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6341                         test_bit(STATUS_READY, &priv->status),
6342                         UCODE_READY_TIMEOUT);
6343         if (!ret) {
6344                 if (!test_bit(STATUS_READY, &priv->status)) {
6345                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6346                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6347                         ret = -ETIMEDOUT;
6348                         goto out_release_irq;
6349                 }
6350         }
6351
6352         priv->is_open = 1;
6353         IWL_DEBUG_MAC80211("leave\n");
6354         return 0;
6355
6356 out_release_irq:
6357         free_irq(priv->pci_dev->irq, priv);
6358 out_disable_msi:
6359         pci_disable_msi(priv->pci_dev);
6360         pci_disable_device(priv->pci_dev);
6361         priv->is_open = 0;
6362         IWL_DEBUG_MAC80211("leave - failed\n");
6363         return ret;
6364 }
6365
6366 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6367 {
6368         struct iwl_priv *priv = hw->priv;
6369
6370         IWL_DEBUG_MAC80211("enter\n");
6371
6372         if (!priv->is_open) {
6373                 IWL_DEBUG_MAC80211("leave - skip\n");
6374                 return;
6375         }
6376
6377         priv->is_open = 0;
6378
6379         if (iwl_is_ready_rf(priv)) {
6380                 /* stop mac, cancel any scan request and clear
6381                  * RXON_FILTER_ASSOC_MSK BIT
6382                  */
6383                 mutex_lock(&priv->mutex);
6384                 iwl4965_scan_cancel_timeout(priv, 100);
6385                 cancel_delayed_work(&priv->post_associate);
6386                 mutex_unlock(&priv->mutex);
6387         }
6388
6389         iwl4965_down(priv);
6390
6391         flush_workqueue(priv->workqueue);
6392         free_irq(priv->pci_dev->irq, priv);
6393         pci_disable_msi(priv->pci_dev);
6394         pci_save_state(priv->pci_dev);
6395         pci_disable_device(priv->pci_dev);
6396
6397         IWL_DEBUG_MAC80211("leave\n");
6398 }
6399
6400 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6401                       struct ieee80211_tx_control *ctl)
6402 {
6403         struct iwl_priv *priv = hw->priv;
6404
6405         IWL_DEBUG_MAC80211("enter\n");
6406
6407         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6408                 IWL_DEBUG_MAC80211("leave - monitor\n");
6409                 return -1;
6410         }
6411
6412         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6413                      ctl->tx_rate->bitrate);
6414
6415         if (iwl4965_tx_skb(priv, skb, ctl))
6416                 dev_kfree_skb_any(skb);
6417
6418         IWL_DEBUG_MAC80211("leave\n");
6419         return 0;
6420 }
6421
6422 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6423                                  struct ieee80211_if_init_conf *conf)
6424 {
6425         struct iwl_priv *priv = hw->priv;
6426         unsigned long flags;
6427         DECLARE_MAC_BUF(mac);
6428
6429         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6430
6431         if (priv->vif) {
6432                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6433                 return -EOPNOTSUPP;
6434         }
6435
6436         spin_lock_irqsave(&priv->lock, flags);
6437         priv->vif = conf->vif;
6438
6439         spin_unlock_irqrestore(&priv->lock, flags);
6440
6441         mutex_lock(&priv->mutex);
6442
6443         if (conf->mac_addr) {
6444                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6445                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6446         }
6447
6448         if (iwl_is_ready(priv))
6449                 iwl4965_set_mode(priv, conf->type);
6450
6451         mutex_unlock(&priv->mutex);
6452
6453         IWL_DEBUG_MAC80211("leave\n");
6454         return 0;
6455 }
6456
6457 /**
6458  * iwl4965_mac_config - mac80211 config callback
6459  *
6460  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6461  * be set inappropriately and the driver currently sets the hardware up to
6462  * use it whenever needed.
6463  */
6464 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6465 {
6466         struct iwl_priv *priv = hw->priv;
6467         const struct iwl_channel_info *ch_info;
6468         unsigned long flags;
6469         int ret = 0;
6470
6471         mutex_lock(&priv->mutex);
6472         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6473
6474         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6475
6476         if (!iwl_is_ready(priv)) {
6477                 IWL_DEBUG_MAC80211("leave - not ready\n");
6478                 ret = -EIO;
6479                 goto out;
6480         }
6481
6482         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6483                      test_bit(STATUS_SCANNING, &priv->status))) {
6484                 IWL_DEBUG_MAC80211("leave - scanning\n");
6485                 set_bit(STATUS_CONF_PENDING, &priv->status);
6486                 mutex_unlock(&priv->mutex);
6487                 return 0;
6488         }
6489
6490         spin_lock_irqsave(&priv->lock, flags);
6491
6492         ch_info = iwl_get_channel_info(priv, conf->channel->band,
6493                         ieee80211_frequency_to_channel(conf->channel->center_freq));
6494         if (!is_channel_valid(ch_info)) {
6495                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6496                 spin_unlock_irqrestore(&priv->lock, flags);
6497                 ret = -EINVAL;
6498                 goto out;
6499         }
6500
6501 #ifdef CONFIG_IWL4965_HT
6502         /* if we are switching from ht to 2.4 clear flags
6503          * from any ht related info since 2.4 does not
6504          * support ht */
6505         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6506 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6507             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6508 #endif
6509         )
6510                 priv->staging_rxon.flags = 0;
6511 #endif /* CONFIG_IWL4965_HT */
6512
6513         iwlcore_set_rxon_channel(priv, conf->channel->band,
6514                 ieee80211_frequency_to_channel(conf->channel->center_freq));
6515
6516         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6517
6518         /* The list of supported rates and rate mask can be different
6519          * for each band; since the band may have changed, reset
6520          * the rate mask to what mac80211 lists */
6521         iwl4965_set_rate(priv);
6522
6523         spin_unlock_irqrestore(&priv->lock, flags);
6524
6525 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6526         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6527                 iwl4965_hw_channel_switch(priv, conf->channel);
6528                 goto out;
6529         }
6530 #endif
6531
6532         if (priv->cfg->ops->lib->radio_kill_sw)
6533                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6534
6535         if (!conf->radio_enabled) {
6536                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6537                 goto out;
6538         }
6539
6540         if (iwl_is_rfkill(priv)) {
6541                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6542                 ret = -EIO;
6543                 goto out;
6544         }
6545
6546         iwl4965_set_rate(priv);
6547
6548         if (memcmp(&priv->active_rxon,
6549                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6550                 iwl4965_commit_rxon(priv);
6551         else
6552                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6553
6554         IWL_DEBUG_MAC80211("leave\n");
6555
6556 out:
6557         clear_bit(STATUS_CONF_PENDING, &priv->status);
6558         mutex_unlock(&priv->mutex);
6559         return ret;
6560 }
6561
6562 static void iwl4965_config_ap(struct iwl_priv *priv)
6563 {
6564         int ret = 0;
6565
6566         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6567                 return;
6568
6569         /* The following should be done only at AP bring up */
6570         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6571
6572                 /* RXON - unassoc (to set timing command) */
6573                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6574                 iwl4965_commit_rxon(priv);
6575
6576                 /* RXON Timing */
6577                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6578                 iwl4965_setup_rxon_timing(priv);
6579                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6580                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6581                 if (ret)
6582                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6583                                         "Attempting to continue.\n");
6584
6585                 iwl4965_set_rxon_chain(priv);
6586
6587                 /* FIXME: what should be the assoc_id for AP? */
6588                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6589                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6590                         priv->staging_rxon.flags |=
6591                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6592                 else
6593                         priv->staging_rxon.flags &=
6594                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6595
6596                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6597                         if (priv->assoc_capability &
6598                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6599                                 priv->staging_rxon.flags |=
6600                                         RXON_FLG_SHORT_SLOT_MSK;
6601                         else
6602                                 priv->staging_rxon.flags &=
6603                                         ~RXON_FLG_SHORT_SLOT_MSK;
6604
6605                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6606                                 priv->staging_rxon.flags &=
6607                                         ~RXON_FLG_SHORT_SLOT_MSK;
6608                 }
6609                 /* restore RXON assoc */
6610                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6611                 iwl4965_commit_rxon(priv);
6612                 iwl4965_activate_qos(priv, 1);
6613                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6614         }
6615         iwl4965_send_beacon_cmd(priv);
6616
6617         /* FIXME - we need to add code here to detect a totally new
6618          * configuration, reset the AP, unassoc, rxon timing, assoc,
6619          * clear sta table, add BCAST sta... */
6620 }
6621
6622 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6623                                         struct ieee80211_vif *vif,
6624                                     struct ieee80211_if_conf *conf)
6625 {
6626         struct iwl_priv *priv = hw->priv;
6627         DECLARE_MAC_BUF(mac);
6628         unsigned long flags;
6629         int rc;
6630
6631         if (conf == NULL)
6632                 return -EIO;
6633
6634         if (priv->vif != vif) {
6635                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6636                 mutex_unlock(&priv->mutex);
6637                 return 0;
6638         }
6639
6640         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6641             (!conf->beacon || !conf->ssid_len)) {
6642                 IWL_DEBUG_MAC80211
6643                     ("Leaving in AP mode because HostAPD is not ready.\n");
6644                 return 0;
6645         }
6646
6647         if (!iwl_is_alive(priv))
6648                 return -EAGAIN;
6649
6650         mutex_lock(&priv->mutex);
6651
6652         if (conf->bssid)
6653                 IWL_DEBUG_MAC80211("bssid: %s\n",
6654                                    print_mac(mac, conf->bssid));
6655
6656 /*
6657  * very dubious code was here; the probe filtering flag is never set:
6658  *
6659         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6660             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6661  */
6662
6663         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6664                 if (!conf->bssid) {
6665                         conf->bssid = priv->mac_addr;
6666                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6667                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6668                                            print_mac(mac, conf->bssid));
6669                 }
6670                 if (priv->ibss_beacon)
6671                         dev_kfree_skb(priv->ibss_beacon);
6672
6673                 priv->ibss_beacon = conf->beacon;
6674         }
6675
6676         if (iwl_is_rfkill(priv))
6677                 goto done;
6678
6679         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6680             !is_multicast_ether_addr(conf->bssid)) {
6681                 /* If there is currently a HW scan going on in the background
6682                  * then we need to cancel it else the RXON below will fail. */
6683                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6684                         IWL_WARNING("Aborted scan still in progress "
6685                                     "after 100ms\n");
6686                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6687                         mutex_unlock(&priv->mutex);
6688                         return -EAGAIN;
6689                 }
6690                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6691
6692                 /* TODO: Audit driver for usage of these members and see
6693                  * if mac80211 deprecates them (priv->bssid looks like it
6694                  * shouldn't be there, but I haven't scanned the IBSS code
6695                  * to verify) - jpk */
6696                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6697
6698                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6699                         iwl4965_config_ap(priv);
6700                 else {
6701                         rc = iwl4965_commit_rxon(priv);
6702                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6703                                 iwl4965_rxon_add_station(
6704                                         priv, priv->active_rxon.bssid_addr, 1);
6705                 }
6706
6707         } else {
6708                 iwl4965_scan_cancel_timeout(priv, 100);
6709                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6710                 iwl4965_commit_rxon(priv);
6711         }
6712
6713  done:
6714         spin_lock_irqsave(&priv->lock, flags);
6715         if (!conf->ssid_len)
6716                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6717         else
6718                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6719
6720         priv->essid_len = conf->ssid_len;
6721         spin_unlock_irqrestore(&priv->lock, flags);
6722
6723         IWL_DEBUG_MAC80211("leave\n");
6724         mutex_unlock(&priv->mutex);
6725
6726         return 0;
6727 }
6728
6729 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6730                                  unsigned int changed_flags,
6731                                  unsigned int *total_flags,
6732                                  int mc_count, struct dev_addr_list *mc_list)
6733 {
6734         /*
6735          * XXX: dummy
6736          * see also iwl4965_connection_init_rx_config
6737          */
6738         *total_flags = 0;
6739 }
6740
6741 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6742                                      struct ieee80211_if_init_conf *conf)
6743 {
6744         struct iwl_priv *priv = hw->priv;
6745
6746         IWL_DEBUG_MAC80211("enter\n");
6747
6748         mutex_lock(&priv->mutex);
6749
6750         if (iwl_is_ready_rf(priv)) {
6751                 iwl4965_scan_cancel_timeout(priv, 100);
6752                 cancel_delayed_work(&priv->post_associate);
6753                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6754                 iwl4965_commit_rxon(priv);
6755         }
6756         if (priv->vif == conf->vif) {
6757                 priv->vif = NULL;
6758                 memset(priv->bssid, 0, ETH_ALEN);
6759                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6760                 priv->essid_len = 0;
6761         }
6762         mutex_unlock(&priv->mutex);
6763
6764         IWL_DEBUG_MAC80211("leave\n");
6765
6766 }
6767
6768
6769 #ifdef CONFIG_IWL4965_HT
6770 static void iwl4965_ht_conf(struct iwl_priv *priv,
6771                             struct ieee80211_bss_conf *bss_conf)
6772 {
6773         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
6774         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
6775         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
6776
6777         IWL_DEBUG_MAC80211("enter: \n");
6778
6779         iwl_conf->is_ht = bss_conf->assoc_ht;
6780
6781         if (!iwl_conf->is_ht)
6782                 return;
6783
6784         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6785
6786         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
6787                 iwl_conf->sgf |= 0x1;
6788         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
6789                 iwl_conf->sgf |= 0x2;
6790
6791         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
6792         iwl_conf->max_amsdu_size =
6793                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
6794
6795         iwl_conf->supported_chan_width =
6796                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
6797         iwl_conf->extension_chan_offset =
6798                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
6799         /* If no above or below channel supplied disable FAT channel */
6800         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
6801             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
6802                 iwl_conf->supported_chan_width = 0;
6803
6804         iwl_conf->tx_mimo_ps_mode =
6805                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6806         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
6807
6808         iwl_conf->control_channel = ht_bss_conf->primary_channel;
6809         iwl_conf->tx_chan_width =
6810                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
6811         iwl_conf->ht_protection =
6812                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
6813         iwl_conf->non_GF_STA_present =
6814                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
6815
6816         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
6817         IWL_DEBUG_MAC80211("leave\n");
6818 }
6819 #else
6820 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
6821                                    struct ieee80211_bss_conf *bss_conf)
6822 {
6823 }
6824 #endif
6825
6826 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6827 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6828                                      struct ieee80211_vif *vif,
6829                                      struct ieee80211_bss_conf *bss_conf,
6830                                      u32 changes)
6831 {
6832         struct iwl_priv *priv = hw->priv;
6833
6834         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6835
6836         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6837                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6838                                    bss_conf->use_short_preamble);
6839                 if (bss_conf->use_short_preamble)
6840                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6841                 else
6842                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6843         }
6844
6845         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6846                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6847                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6848                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6849                 else
6850                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6851         }
6852
6853         if (changes & BSS_CHANGED_HT) {
6854                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6855                 iwl4965_ht_conf(priv, bss_conf);
6856                 iwl4965_set_rxon_chain(priv);
6857         }
6858
6859         if (changes & BSS_CHANGED_ASSOC) {
6860                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6861                 if (bss_conf->assoc) {
6862                         priv->assoc_id = bss_conf->aid;
6863                         priv->beacon_int = bss_conf->beacon_int;
6864                         priv->timestamp = bss_conf->timestamp;
6865                         priv->assoc_capability = bss_conf->assoc_capability;
6866                         priv->next_scan_jiffies = jiffies +
6867                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6868                         queue_work(priv->workqueue, &priv->post_associate.work);
6869                 } else {
6870                         priv->assoc_id = 0;
6871                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6872                 }
6873         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6874                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6875                         iwl4965_send_rxon_assoc(priv);
6876         }
6877
6878 }
6879
6880 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6881 {
6882         int rc = 0;
6883         unsigned long flags;
6884         struct iwl_priv *priv = hw->priv;
6885
6886         IWL_DEBUG_MAC80211("enter\n");
6887
6888         mutex_lock(&priv->mutex);
6889         spin_lock_irqsave(&priv->lock, flags);
6890
6891         if (!iwl_is_ready_rf(priv)) {
6892                 rc = -EIO;
6893                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6894                 goto out_unlock;
6895         }
6896
6897         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6898                 rc = -EIO;
6899                 IWL_ERROR("ERROR: APs don't scan\n");
6900                 goto out_unlock;
6901         }
6902
6903         /* we don't schedule scan within next_scan_jiffies period */
6904         if (priv->next_scan_jiffies &&
6905                         time_after(priv->next_scan_jiffies, jiffies)) {
6906                 rc = -EAGAIN;
6907                 goto out_unlock;
6908         }
6909         /* if we just finished scan ask for delay */
6910         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6911                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
6912                 rc = -EAGAIN;
6913                 goto out_unlock;
6914         }
6915         if (len) {
6916                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6917                                iwl4965_escape_essid(ssid, len), (int)len);
6918
6919                 priv->one_direct_scan = 1;
6920                 priv->direct_ssid_len = (u8)
6921                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6922                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6923         } else
6924                 priv->one_direct_scan = 0;
6925
6926         rc = iwl4965_scan_initiate(priv);
6927
6928         IWL_DEBUG_MAC80211("leave\n");
6929
6930 out_unlock:
6931         spin_unlock_irqrestore(&priv->lock, flags);
6932         mutex_unlock(&priv->mutex);
6933
6934         return rc;
6935 }
6936
6937 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6938                         struct ieee80211_key_conf *keyconf, const u8 *addr,
6939                         u32 iv32, u16 *phase1key)
6940 {
6941         struct iwl_priv *priv = hw->priv;
6942         u8 sta_id = IWL_INVALID_STATION;
6943         unsigned long flags;
6944         __le16 key_flags = 0;
6945         int i;
6946         DECLARE_MAC_BUF(mac);
6947
6948         IWL_DEBUG_MAC80211("enter\n");
6949
6950         sta_id = iwl4965_hw_find_station(priv, addr);
6951         if (sta_id == IWL_INVALID_STATION) {
6952                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6953                                    print_mac(mac, addr));
6954                 return;
6955         }
6956
6957         iwl4965_scan_cancel_timeout(priv, 100);
6958
6959         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6960         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6961         key_flags &= ~STA_KEY_FLG_INVALID;
6962
6963         if (sta_id == priv->hw_setting.bcast_sta_id)
6964                 key_flags |= STA_KEY_MULTICAST_MSK;
6965
6966         spin_lock_irqsave(&priv->sta_lock, flags);
6967
6968         priv->stations[sta_id].sta.key.key_offset =
6969                                         (sta_id % STA_KEY_MAX_NUM);/* FIXME */
6970         priv->stations[sta_id].sta.key.key_flags = key_flags;
6971         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6972
6973         for (i = 0; i < 5; i++)
6974                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6975                         cpu_to_le16(phase1key[i]);
6976
6977         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6978         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6979
6980         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6981
6982         spin_unlock_irqrestore(&priv->sta_lock, flags);
6983
6984         IWL_DEBUG_MAC80211("leave\n");
6985 }
6986
6987 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6988                            const u8 *local_addr, const u8 *addr,
6989                            struct ieee80211_key_conf *key)
6990 {
6991         struct iwl_priv *priv = hw->priv;
6992         DECLARE_MAC_BUF(mac);
6993         int ret = 0;
6994         u8 sta_id = IWL_INVALID_STATION;
6995         u8 is_default_wep_key = 0;
6996
6997         IWL_DEBUG_MAC80211("enter\n");
6998
6999         if (!priv->cfg->mod_params->hw_crypto) {
7000                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7001                 return -EOPNOTSUPP;
7002         }
7003
7004         if (is_zero_ether_addr(addr))
7005                 /* only support pairwise keys */
7006                 return -EOPNOTSUPP;
7007
7008         sta_id = iwl4965_hw_find_station(priv, addr);
7009         if (sta_id == IWL_INVALID_STATION) {
7010                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7011                                    print_mac(mac, addr));
7012                 return -EINVAL;
7013
7014         }
7015
7016         mutex_lock(&priv->mutex);
7017         iwl4965_scan_cancel_timeout(priv, 100);
7018         mutex_unlock(&priv->mutex);
7019
7020         /* If we are getting WEP group key and we didn't receive any key mapping
7021          * so far, we are in legacy wep mode (group key only), otherwise we are
7022          * in 1X mode.
7023          * In legacy wep mode, we use another host command to the uCode */
7024         if (key->alg == ALG_WEP && sta_id == priv->hw_setting.bcast_sta_id &&
7025                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7026                 if (cmd == SET_KEY)
7027                         is_default_wep_key = !priv->key_mapping_key;
7028                 else
7029                         is_default_wep_key = priv->default_wep_key;
7030         }
7031
7032         switch (cmd) {
7033         case SET_KEY:
7034                 if (is_default_wep_key)
7035                         ret = iwl_set_default_wep_key(priv, key);
7036                 else
7037                         ret = iwl4965_set_dynamic_key(priv, key, sta_id);
7038
7039                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
7040                 break;
7041         case DISABLE_KEY:
7042                 if (is_default_wep_key)
7043                         ret = iwl_remove_default_wep_key(priv, key);
7044                 else
7045                         ret = iwl4965_clear_sta_key_info(priv, sta_id);
7046
7047                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7048                 break;
7049         default:
7050                 ret = -EINVAL;
7051         }
7052
7053         IWL_DEBUG_MAC80211("leave\n");
7054
7055         return ret;
7056 }
7057
7058 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7059                            const struct ieee80211_tx_queue_params *params)
7060 {
7061         struct iwl_priv *priv = hw->priv;
7062         unsigned long flags;
7063         int q;
7064
7065         IWL_DEBUG_MAC80211("enter\n");
7066
7067         if (!iwl_is_ready_rf(priv)) {
7068                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7069                 return -EIO;
7070         }
7071
7072         if (queue >= AC_NUM) {
7073                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7074                 return 0;
7075         }
7076
7077         if (!priv->qos_data.qos_enable) {
7078                 priv->qos_data.qos_active = 0;
7079                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7080                 return 0;
7081         }
7082         q = AC_NUM - 1 - queue;
7083
7084         spin_lock_irqsave(&priv->lock, flags);
7085
7086         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7087         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7088         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7089         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7090                         cpu_to_le16((params->txop * 32));
7091
7092         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7093         priv->qos_data.qos_active = 1;
7094
7095         spin_unlock_irqrestore(&priv->lock, flags);
7096
7097         mutex_lock(&priv->mutex);
7098         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7099                 iwl4965_activate_qos(priv, 1);
7100         else if (priv->assoc_id && iwl_is_associated(priv))
7101                 iwl4965_activate_qos(priv, 0);
7102
7103         mutex_unlock(&priv->mutex);
7104
7105         IWL_DEBUG_MAC80211("leave\n");
7106         return 0;
7107 }
7108
7109 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
7110                                 struct ieee80211_tx_queue_stats *stats)
7111 {
7112         struct iwl_priv *priv = hw->priv;
7113         int i, avail;
7114         struct iwl4965_tx_queue *txq;
7115         struct iwl4965_queue *q;
7116         unsigned long flags;
7117
7118         IWL_DEBUG_MAC80211("enter\n");
7119
7120         if (!iwl_is_ready_rf(priv)) {
7121                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7122                 return -EIO;
7123         }
7124
7125         spin_lock_irqsave(&priv->lock, flags);
7126
7127         for (i = 0; i < AC_NUM; i++) {
7128                 txq = &priv->txq[i];
7129                 q = &txq->q;
7130                 avail = iwl4965_queue_space(q);
7131
7132                 stats->data[i].len = q->n_window - avail;
7133                 stats->data[i].limit = q->n_window - q->high_mark;
7134                 stats->data[i].count = q->n_window;
7135
7136         }
7137         spin_unlock_irqrestore(&priv->lock, flags);
7138
7139         IWL_DEBUG_MAC80211("leave\n");
7140
7141         return 0;
7142 }
7143
7144 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
7145                              struct ieee80211_low_level_stats *stats)
7146 {
7147         IWL_DEBUG_MAC80211("enter\n");
7148         IWL_DEBUG_MAC80211("leave\n");
7149
7150         return 0;
7151 }
7152
7153 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
7154 {
7155         IWL_DEBUG_MAC80211("enter\n");
7156         IWL_DEBUG_MAC80211("leave\n");
7157
7158         return 0;
7159 }
7160
7161 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7162 {
7163         struct iwl_priv *priv = hw->priv;
7164         unsigned long flags;
7165
7166         mutex_lock(&priv->mutex);
7167         IWL_DEBUG_MAC80211("enter\n");
7168
7169         priv->lq_mngr.lq_ready = 0;
7170 #ifdef CONFIG_IWL4965_HT
7171         spin_lock_irqsave(&priv->lock, flags);
7172         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7173         spin_unlock_irqrestore(&priv->lock, flags);
7174 #endif /* CONFIG_IWL4965_HT */
7175
7176         iwlcore_reset_qos(priv);
7177
7178         cancel_delayed_work(&priv->post_associate);
7179
7180         spin_lock_irqsave(&priv->lock, flags);
7181         priv->assoc_id = 0;
7182         priv->assoc_capability = 0;
7183         priv->assoc_station_added = 0;
7184
7185         /* new association get rid of ibss beacon skb */
7186         if (priv->ibss_beacon)
7187                 dev_kfree_skb(priv->ibss_beacon);
7188
7189         priv->ibss_beacon = NULL;
7190
7191         priv->beacon_int = priv->hw->conf.beacon_int;
7192         priv->timestamp = 0;
7193         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7194                 priv->beacon_int = 0;
7195
7196         spin_unlock_irqrestore(&priv->lock, flags);
7197
7198         if (!iwl_is_ready_rf(priv)) {
7199                 IWL_DEBUG_MAC80211("leave - not ready\n");
7200                 mutex_unlock(&priv->mutex);
7201                 return;
7202         }
7203
7204         /* we are restarting association process
7205          * clear RXON_FILTER_ASSOC_MSK bit
7206          */
7207         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7208                 iwl4965_scan_cancel_timeout(priv, 100);
7209                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7210                 iwl4965_commit_rxon(priv);
7211         }
7212
7213         /* Per mac80211.h: This is only used in IBSS mode... */
7214         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7215
7216                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7217                 mutex_unlock(&priv->mutex);
7218                 return;
7219         }
7220
7221         priv->only_active_channel = 0;
7222
7223         iwl4965_set_rate(priv);
7224
7225         mutex_unlock(&priv->mutex);
7226
7227         IWL_DEBUG_MAC80211("leave\n");
7228 }
7229
7230 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7231                                  struct ieee80211_tx_control *control)
7232 {
7233         struct iwl_priv *priv = hw->priv;
7234         unsigned long flags;
7235
7236         mutex_lock(&priv->mutex);
7237         IWL_DEBUG_MAC80211("enter\n");
7238
7239         if (!iwl_is_ready_rf(priv)) {
7240                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7241                 mutex_unlock(&priv->mutex);
7242                 return -EIO;
7243         }
7244
7245         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7246                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7247                 mutex_unlock(&priv->mutex);
7248                 return -EIO;
7249         }
7250
7251         spin_lock_irqsave(&priv->lock, flags);
7252
7253         if (priv->ibss_beacon)
7254                 dev_kfree_skb(priv->ibss_beacon);
7255
7256         priv->ibss_beacon = skb;
7257
7258         priv->assoc_id = 0;
7259
7260         IWL_DEBUG_MAC80211("leave\n");
7261         spin_unlock_irqrestore(&priv->lock, flags);
7262
7263         iwlcore_reset_qos(priv);
7264
7265         queue_work(priv->workqueue, &priv->post_associate.work);
7266
7267         mutex_unlock(&priv->mutex);
7268
7269         return 0;
7270 }
7271
7272 /*****************************************************************************
7273  *
7274  * sysfs attributes
7275  *
7276  *****************************************************************************/
7277
7278 #ifdef CONFIG_IWLWIFI_DEBUG
7279
7280 /*
7281  * The following adds a new attribute to the sysfs representation
7282  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7283  * used for controlling the debug level.
7284  *
7285  * See the level definitions in iwl for details.
7286  */
7287
7288 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7289 {
7290         return sprintf(buf, "0x%08X\n", iwl_debug_level);
7291 }
7292 static ssize_t store_debug_level(struct device_driver *d,
7293                                  const char *buf, size_t count)
7294 {
7295         char *p = (char *)buf;
7296         u32 val;
7297
7298         val = simple_strtoul(p, &p, 0);
7299         if (p == buf)
7300                 printk(KERN_INFO DRV_NAME
7301                        ": %s is not in hex or decimal form.\n", buf);
7302         else
7303                 iwl_debug_level = val;
7304
7305         return strnlen(buf, count);
7306 }
7307
7308 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7309                    show_debug_level, store_debug_level);
7310
7311 #endif /* CONFIG_IWLWIFI_DEBUG */
7312
7313
7314 static ssize_t show_temperature(struct device *d,
7315                                 struct device_attribute *attr, char *buf)
7316 {
7317         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7318
7319         if (!iwl_is_alive(priv))
7320                 return -EAGAIN;
7321
7322         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7323 }
7324
7325 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7326
7327 static ssize_t show_rs_window(struct device *d,
7328                               struct device_attribute *attr,
7329                               char *buf)
7330 {
7331         struct iwl_priv *priv = d->driver_data;
7332         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7333 }
7334 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7335
7336 static ssize_t show_tx_power(struct device *d,
7337                              struct device_attribute *attr, char *buf)
7338 {
7339         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7340         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7341 }
7342
7343 static ssize_t store_tx_power(struct device *d,
7344                               struct device_attribute *attr,
7345                               const char *buf, size_t count)
7346 {
7347         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7348         char *p = (char *)buf;
7349         u32 val;
7350
7351         val = simple_strtoul(p, &p, 10);
7352         if (p == buf)
7353                 printk(KERN_INFO DRV_NAME
7354                        ": %s is not in decimal form.\n", buf);
7355         else
7356                 iwl4965_hw_reg_set_txpower(priv, val);
7357
7358         return count;
7359 }
7360
7361 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7362
7363 static ssize_t show_flags(struct device *d,
7364                           struct device_attribute *attr, char *buf)
7365 {
7366         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7367
7368         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7369 }
7370
7371 static ssize_t store_flags(struct device *d,
7372                            struct device_attribute *attr,
7373                            const char *buf, size_t count)
7374 {
7375         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7376         u32 flags = simple_strtoul(buf, NULL, 0);
7377
7378         mutex_lock(&priv->mutex);
7379         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7380                 /* Cancel any currently running scans... */
7381                 if (iwl4965_scan_cancel_timeout(priv, 100))
7382                         IWL_WARNING("Could not cancel scan.\n");
7383                 else {
7384                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7385                                        flags);
7386                         priv->staging_rxon.flags = cpu_to_le32(flags);
7387                         iwl4965_commit_rxon(priv);
7388                 }
7389         }
7390         mutex_unlock(&priv->mutex);
7391
7392         return count;
7393 }
7394
7395 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7396
7397 static ssize_t show_filter_flags(struct device *d,
7398                                  struct device_attribute *attr, char *buf)
7399 {
7400         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7401
7402         return sprintf(buf, "0x%04X\n",
7403                 le32_to_cpu(priv->active_rxon.filter_flags));
7404 }
7405
7406 static ssize_t store_filter_flags(struct device *d,
7407                                   struct device_attribute *attr,
7408                                   const char *buf, size_t count)
7409 {
7410         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7411         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7412
7413         mutex_lock(&priv->mutex);
7414         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7415                 /* Cancel any currently running scans... */
7416                 if (iwl4965_scan_cancel_timeout(priv, 100))
7417                         IWL_WARNING("Could not cancel scan.\n");
7418                 else {
7419                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7420                                        "0x%04X\n", filter_flags);
7421                         priv->staging_rxon.filter_flags =
7422                                 cpu_to_le32(filter_flags);
7423                         iwl4965_commit_rxon(priv);
7424                 }
7425         }
7426         mutex_unlock(&priv->mutex);
7427
7428         return count;
7429 }
7430
7431 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7432                    store_filter_flags);
7433
7434 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7435
7436 static ssize_t show_measurement(struct device *d,
7437                                 struct device_attribute *attr, char *buf)
7438 {
7439         struct iwl_priv *priv = dev_get_drvdata(d);
7440         struct iwl4965_spectrum_notification measure_report;
7441         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7442         u8 *data = (u8 *) & measure_report;
7443         unsigned long flags;
7444
7445         spin_lock_irqsave(&priv->lock, flags);
7446         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7447                 spin_unlock_irqrestore(&priv->lock, flags);
7448                 return 0;
7449         }
7450         memcpy(&measure_report, &priv->measure_report, size);
7451         priv->measurement_status = 0;
7452         spin_unlock_irqrestore(&priv->lock, flags);
7453
7454         while (size && (PAGE_SIZE - len)) {
7455                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7456                                    PAGE_SIZE - len, 1);
7457                 len = strlen(buf);
7458                 if (PAGE_SIZE - len)
7459                         buf[len++] = '\n';
7460
7461                 ofs += 16;
7462                 size -= min(size, 16U);
7463         }
7464
7465         return len;
7466 }
7467
7468 static ssize_t store_measurement(struct device *d,
7469                                  struct device_attribute *attr,
7470                                  const char *buf, size_t count)
7471 {
7472         struct iwl_priv *priv = dev_get_drvdata(d);
7473         struct ieee80211_measurement_params params = {
7474                 .channel = le16_to_cpu(priv->active_rxon.channel),
7475                 .start_time = cpu_to_le64(priv->last_tsf),
7476                 .duration = cpu_to_le16(1),
7477         };
7478         u8 type = IWL_MEASURE_BASIC;
7479         u8 buffer[32];
7480         u8 channel;
7481
7482         if (count) {
7483                 char *p = buffer;
7484                 strncpy(buffer, buf, min(sizeof(buffer), count));
7485                 channel = simple_strtoul(p, NULL, 0);
7486                 if (channel)
7487                         params.channel = channel;
7488
7489                 p = buffer;
7490                 while (*p && *p != ' ')
7491                         p++;
7492                 if (*p)
7493                         type = simple_strtoul(p + 1, NULL, 0);
7494         }
7495
7496         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7497                        "channel %d (for '%s')\n", type, params.channel, buf);
7498         iwl4965_get_measurement(priv, &params, type);
7499
7500         return count;
7501 }
7502
7503 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7504                    show_measurement, store_measurement);
7505 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7506
7507 static ssize_t store_retry_rate(struct device *d,
7508                                 struct device_attribute *attr,
7509                                 const char *buf, size_t count)
7510 {
7511         struct iwl_priv *priv = dev_get_drvdata(d);
7512
7513         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7514         if (priv->retry_rate <= 0)
7515                 priv->retry_rate = 1;
7516
7517         return count;
7518 }
7519
7520 static ssize_t show_retry_rate(struct device *d,
7521                                struct device_attribute *attr, char *buf)
7522 {
7523         struct iwl_priv *priv = dev_get_drvdata(d);
7524         return sprintf(buf, "%d", priv->retry_rate);
7525 }
7526
7527 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7528                    store_retry_rate);
7529
7530 static ssize_t store_power_level(struct device *d,
7531                                  struct device_attribute *attr,
7532                                  const char *buf, size_t count)
7533 {
7534         struct iwl_priv *priv = dev_get_drvdata(d);
7535         int rc;
7536         int mode;
7537
7538         mode = simple_strtoul(buf, NULL, 0);
7539         mutex_lock(&priv->mutex);
7540
7541         if (!iwl_is_ready(priv)) {
7542                 rc = -EAGAIN;
7543                 goto out;
7544         }
7545
7546         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7547                 mode = IWL_POWER_AC;
7548         else
7549                 mode |= IWL_POWER_ENABLED;
7550
7551         if (mode != priv->power_mode) {
7552                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7553                 if (rc) {
7554                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7555                         goto out;
7556                 }
7557                 priv->power_mode = mode;
7558         }
7559
7560         rc = count;
7561
7562  out:
7563         mutex_unlock(&priv->mutex);
7564         return rc;
7565 }
7566
7567 #define MAX_WX_STRING 80
7568
7569 /* Values are in microsecond */
7570 static const s32 timeout_duration[] = {
7571         350000,
7572         250000,
7573         75000,
7574         37000,
7575         25000,
7576 };
7577 static const s32 period_duration[] = {
7578         400000,
7579         700000,
7580         1000000,
7581         1000000,
7582         1000000
7583 };
7584
7585 static ssize_t show_power_level(struct device *d,
7586                                 struct device_attribute *attr, char *buf)
7587 {
7588         struct iwl_priv *priv = dev_get_drvdata(d);
7589         int level = IWL_POWER_LEVEL(priv->power_mode);
7590         char *p = buf;
7591
7592         p += sprintf(p, "%d ", level);
7593         switch (level) {
7594         case IWL_POWER_MODE_CAM:
7595         case IWL_POWER_AC:
7596                 p += sprintf(p, "(AC)");
7597                 break;
7598         case IWL_POWER_BATTERY:
7599                 p += sprintf(p, "(BATTERY)");
7600                 break;
7601         default:
7602                 p += sprintf(p,
7603                              "(Timeout %dms, Period %dms)",
7604                              timeout_duration[level - 1] / 1000,
7605                              period_duration[level - 1] / 1000);
7606         }
7607
7608         if (!(priv->power_mode & IWL_POWER_ENABLED))
7609                 p += sprintf(p, " OFF\n");
7610         else
7611                 p += sprintf(p, " \n");
7612
7613         return (p - buf + 1);
7614
7615 }
7616
7617 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7618                    store_power_level);
7619
7620 static ssize_t show_channels(struct device *d,
7621                              struct device_attribute *attr, char *buf)
7622 {
7623         /* all this shit doesn't belong into sysfs anyway */
7624         return 0;
7625 }
7626
7627 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7628
7629 static ssize_t show_statistics(struct device *d,
7630                                struct device_attribute *attr, char *buf)
7631 {
7632         struct iwl_priv *priv = dev_get_drvdata(d);
7633         u32 size = sizeof(struct iwl4965_notif_statistics);
7634         u32 len = 0, ofs = 0;
7635         u8 *data = (u8 *) & priv->statistics;
7636         int rc = 0;
7637
7638         if (!iwl_is_alive(priv))
7639                 return -EAGAIN;
7640
7641         mutex_lock(&priv->mutex);
7642         rc = iwl4965_send_statistics_request(priv);
7643         mutex_unlock(&priv->mutex);
7644
7645         if (rc) {
7646                 len = sprintf(buf,
7647                               "Error sending statistics request: 0x%08X\n", rc);
7648                 return len;
7649         }
7650
7651         while (size && (PAGE_SIZE - len)) {
7652                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7653                                    PAGE_SIZE - len, 1);
7654                 len = strlen(buf);
7655                 if (PAGE_SIZE - len)
7656                         buf[len++] = '\n';
7657
7658                 ofs += 16;
7659                 size -= min(size, 16U);
7660         }
7661
7662         return len;
7663 }
7664
7665 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7666
7667 static ssize_t show_antenna(struct device *d,
7668                             struct device_attribute *attr, char *buf)
7669 {
7670         struct iwl_priv *priv = dev_get_drvdata(d);
7671
7672         if (!iwl_is_alive(priv))
7673                 return -EAGAIN;
7674
7675         return sprintf(buf, "%d\n", priv->antenna);
7676 }
7677
7678 static ssize_t store_antenna(struct device *d,
7679                              struct device_attribute *attr,
7680                              const char *buf, size_t count)
7681 {
7682         int ant;
7683         struct iwl_priv *priv = dev_get_drvdata(d);
7684
7685         if (count == 0)
7686                 return 0;
7687
7688         if (sscanf(buf, "%1i", &ant) != 1) {
7689                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7690                 return count;
7691         }
7692
7693         if ((ant >= 0) && (ant <= 2)) {
7694                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7695                 priv->antenna = (enum iwl4965_antenna)ant;
7696         } else
7697                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7698
7699
7700         return count;
7701 }
7702
7703 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7704
7705 static ssize_t show_status(struct device *d,
7706                            struct device_attribute *attr, char *buf)
7707 {
7708         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7709         if (!iwl_is_alive(priv))
7710                 return -EAGAIN;
7711         return sprintf(buf, "0x%08x\n", (int)priv->status);
7712 }
7713
7714 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7715
7716 static ssize_t dump_error_log(struct device *d,
7717                               struct device_attribute *attr,
7718                               const char *buf, size_t count)
7719 {
7720         char *p = (char *)buf;
7721
7722         if (p[0] == '1')
7723                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7724
7725         return strnlen(buf, count);
7726 }
7727
7728 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7729
7730 static ssize_t dump_event_log(struct device *d,
7731                               struct device_attribute *attr,
7732                               const char *buf, size_t count)
7733 {
7734         char *p = (char *)buf;
7735
7736         if (p[0] == '1')
7737                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7738
7739         return strnlen(buf, count);
7740 }
7741
7742 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7743
7744 /*****************************************************************************
7745  *
7746  * driver setup and teardown
7747  *
7748  *****************************************************************************/
7749
7750 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7751 {
7752         priv->workqueue = create_workqueue(DRV_NAME);
7753
7754         init_waitqueue_head(&priv->wait_command_queue);
7755
7756         INIT_WORK(&priv->up, iwl4965_bg_up);
7757         INIT_WORK(&priv->restart, iwl4965_bg_restart);
7758         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7759         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7760         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7761         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7762         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7763         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7764         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7765         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7766         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7767         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7768
7769         iwl4965_hw_setup_deferred_work(priv);
7770
7771         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7772                      iwl4965_irq_tasklet, (unsigned long)priv);
7773 }
7774
7775 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7776 {
7777         iwl4965_hw_cancel_deferred_work(priv);
7778
7779         cancel_delayed_work_sync(&priv->init_alive_start);
7780         cancel_delayed_work(&priv->scan_check);
7781         cancel_delayed_work(&priv->alive_start);
7782         cancel_delayed_work(&priv->post_associate);
7783         cancel_work_sync(&priv->beacon_update);
7784 }
7785
7786 static struct attribute *iwl4965_sysfs_entries[] = {
7787         &dev_attr_antenna.attr,
7788         &dev_attr_channels.attr,
7789         &dev_attr_dump_errors.attr,
7790         &dev_attr_dump_events.attr,
7791         &dev_attr_flags.attr,
7792         &dev_attr_filter_flags.attr,
7793 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7794         &dev_attr_measurement.attr,
7795 #endif
7796         &dev_attr_power_level.attr,
7797         &dev_attr_retry_rate.attr,
7798         &dev_attr_rs_window.attr,
7799         &dev_attr_statistics.attr,
7800         &dev_attr_status.attr,
7801         &dev_attr_temperature.attr,
7802         &dev_attr_tx_power.attr,
7803
7804         NULL
7805 };
7806
7807 static struct attribute_group iwl4965_attribute_group = {
7808         .name = NULL,           /* put in device directory */
7809         .attrs = iwl4965_sysfs_entries,
7810 };
7811
7812 static struct ieee80211_ops iwl4965_hw_ops = {
7813         .tx = iwl4965_mac_tx,
7814         .start = iwl4965_mac_start,
7815         .stop = iwl4965_mac_stop,
7816         .add_interface = iwl4965_mac_add_interface,
7817         .remove_interface = iwl4965_mac_remove_interface,
7818         .config = iwl4965_mac_config,
7819         .config_interface = iwl4965_mac_config_interface,
7820         .configure_filter = iwl4965_configure_filter,
7821         .set_key = iwl4965_mac_set_key,
7822         .update_tkip_key = iwl4965_mac_update_tkip_key,
7823         .get_stats = iwl4965_mac_get_stats,
7824         .get_tx_stats = iwl4965_mac_get_tx_stats,
7825         .conf_tx = iwl4965_mac_conf_tx,
7826         .get_tsf = iwl4965_mac_get_tsf,
7827         .reset_tsf = iwl4965_mac_reset_tsf,
7828         .beacon_update = iwl4965_mac_beacon_update,
7829         .bss_info_changed = iwl4965_bss_info_changed,
7830 #ifdef CONFIG_IWL4965_HT
7831         .ampdu_action = iwl4965_mac_ampdu_action,
7832 #endif  /* CONFIG_IWL4965_HT */
7833         .hw_scan = iwl4965_mac_hw_scan
7834 };
7835
7836 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7837 {
7838         int err = 0;
7839         struct iwl_priv *priv;
7840         struct ieee80211_hw *hw;
7841         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7842         unsigned long flags;
7843         DECLARE_MAC_BUF(mac);
7844
7845         /************************
7846          * 1. Allocating HW data
7847          ************************/
7848
7849         /* Disabling hardware scan means that mac80211 will perform scans
7850          * "the hard way", rather than using device's scan. */
7851         if (cfg->mod_params->disable_hw_scan) {
7852                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7853                 iwl4965_hw_ops.hw_scan = NULL;
7854         }
7855
7856         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7857         if (!hw) {
7858                 err = -ENOMEM;
7859                 goto out;
7860         }
7861         priv = hw->priv;
7862         /* At this point both hw and priv are allocated. */
7863
7864         SET_IEEE80211_DEV(hw, &pdev->dev);
7865
7866         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7867         priv->cfg = cfg;
7868         priv->pci_dev = pdev;
7869
7870 #ifdef CONFIG_IWLWIFI_DEBUG
7871         iwl_debug_level = priv->cfg->mod_params->debug;
7872         atomic_set(&priv->restrict_refcnt, 0);
7873 #endif
7874
7875         /**************************
7876          * 2. Initializing PCI bus
7877          **************************/
7878         if (pci_enable_device(pdev)) {
7879                 err = -ENODEV;
7880                 goto out_ieee80211_free_hw;
7881         }
7882
7883         pci_set_master(pdev);
7884
7885         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7886         if (!err)
7887                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7888                 if (err) {
7889                         printk(KERN_WARNING DRV_NAME
7890                                 ": No suitable DMA available.\n");
7891                         goto out_pci_disable_device;
7892         }
7893
7894         err = pci_request_regions(pdev, DRV_NAME);
7895         if (err)
7896                 goto out_pci_disable_device;
7897
7898         pci_set_drvdata(pdev, priv);
7899
7900         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7901          * PCI Tx retries from interfering with C3 CPU state */
7902         pci_write_config_byte(pdev, 0x41, 0x00);
7903
7904         /***********************
7905          * 3. Read REV register
7906          ***********************/
7907         priv->hw_base = pci_iomap(pdev, 0, 0);
7908         if (!priv->hw_base) {
7909                 err = -ENODEV;
7910                 goto out_pci_release_regions;
7911         }
7912
7913         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7914                 (unsigned long long) pci_resource_len(pdev, 0));
7915         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7916
7917         printk(KERN_INFO DRV_NAME
7918                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7919
7920         /*****************
7921          * 4. Read EEPROM
7922          *****************/
7923         /* nic init */
7924         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7925                 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7926
7927         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7928         err = iwl_poll_bit(priv, CSR_GP_CNTRL,
7929                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7930                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7931         if (err < 0) {
7932                 IWL_DEBUG_INFO("Failed to init the card\n");
7933                 goto out_iounmap;
7934         }
7935         /* Read the EEPROM */
7936         err = iwl_eeprom_init(priv);
7937         if (err) {
7938                 IWL_ERROR("Unable to init EEPROM\n");
7939                 goto out_iounmap;
7940         }
7941         /* MAC Address location in EEPROM same for 3945/4965 */
7942         iwl_eeprom_get_mac(priv, priv->mac_addr);
7943         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7944         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7945
7946         /************************
7947          * 5. Setup HW constants
7948          ************************/
7949         /* Device-specific setup */
7950         if (iwl4965_hw_set_hw_setting(priv)) {
7951                 IWL_ERROR("failed to set hw settings\n");
7952                 goto out_iounmap;
7953         }
7954
7955         /*******************
7956          * 6. Setup hw/priv
7957          *******************/
7958
7959         err = iwl_setup(priv);
7960         if (err)
7961                 goto out_unset_hw_settings;
7962         /* At this point both hw and priv are initialized. */
7963
7964         /**********************************
7965          * 7. Initialize module parameters
7966          **********************************/
7967
7968         /* Disable radio (SW RF KILL) via parameter when loading driver */
7969         if (priv->cfg->mod_params->disable) {
7970                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7971                 IWL_DEBUG_INFO("Radio disabled.\n");
7972         }
7973
7974         if (priv->cfg->mod_params->enable_qos)
7975                 priv->qos_data.qos_enable = 1;
7976
7977         /********************
7978          * 8. Setup services
7979          ********************/
7980         spin_lock_irqsave(&priv->lock, flags);
7981         iwl4965_disable_interrupts(priv);
7982         spin_unlock_irqrestore(&priv->lock, flags);
7983
7984         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7985         if (err) {
7986                 IWL_ERROR("failed to create sysfs device attributes\n");
7987                 goto out_unset_hw_settings;
7988         }
7989
7990         err = iwl_dbgfs_register(priv, DRV_NAME);
7991         if (err) {
7992                 IWL_ERROR("failed to create debugfs files\n");
7993                 goto out_remove_sysfs;
7994         }
7995
7996         iwl4965_setup_deferred_work(priv);
7997         iwl4965_setup_rx_handlers(priv);
7998
7999         /********************
8000          * 9. Conclude
8001          ********************/
8002         pci_save_state(pdev);
8003         pci_disable_device(pdev);
8004
8005         /* notify iwlcore to init */
8006         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
8007         return 0;
8008
8009  out_remove_sysfs:
8010         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8011  out_unset_hw_settings:
8012         iwl4965_unset_hw_setting(priv);
8013  out_iounmap:
8014         pci_iounmap(pdev, priv->hw_base);
8015  out_pci_release_regions:
8016         pci_release_regions(pdev);
8017         pci_set_drvdata(pdev, NULL);
8018  out_pci_disable_device:
8019         pci_disable_device(pdev);
8020  out_ieee80211_free_hw:
8021         ieee80211_free_hw(priv->hw);
8022  out:
8023         return err;
8024 }
8025
8026 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
8027 {
8028         struct iwl_priv *priv = pci_get_drvdata(pdev);
8029         struct list_head *p, *q;
8030         int i;
8031         unsigned long flags;
8032
8033         if (!priv)
8034                 return;
8035
8036         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8037
8038         if (priv->mac80211_registered) {
8039                 ieee80211_unregister_hw(priv->hw);
8040                 priv->mac80211_registered = 0;
8041         }
8042
8043         set_bit(STATUS_EXIT_PENDING, &priv->status);
8044
8045         iwl4965_down(priv);
8046
8047         /* make sure we flush any pending irq or
8048          * tasklet for the driver
8049          */
8050         spin_lock_irqsave(&priv->lock, flags);
8051         iwl4965_disable_interrupts(priv);
8052         spin_unlock_irqrestore(&priv->lock, flags);
8053
8054         iwl_synchronize_irq(priv);
8055
8056         /* Free MAC hash list for ADHOC */
8057         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8058                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8059                         list_del(p);
8060                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
8061                 }
8062         }
8063
8064         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
8065         iwl_dbgfs_unregister(priv);
8066         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8067
8068         iwl4965_dealloc_ucode_pci(priv);
8069
8070         if (priv->rxq.bd)
8071                 iwl4965_rx_queue_free(priv, &priv->rxq);
8072         iwl4965_hw_txq_ctx_free(priv);
8073
8074         iwl4965_unset_hw_setting(priv);
8075         iwlcore_clear_stations_table(priv);
8076
8077
8078         /*netif_stop_queue(dev); */
8079         flush_workqueue(priv->workqueue);
8080
8081         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
8082          * priv->workqueue... so we can't take down the workqueue
8083          * until now... */
8084         destroy_workqueue(priv->workqueue);
8085         priv->workqueue = NULL;
8086
8087         pci_iounmap(pdev, priv->hw_base);
8088         pci_release_regions(pdev);
8089         pci_disable_device(pdev);
8090         pci_set_drvdata(pdev, NULL);
8091
8092         iwl_free_channel_map(priv);
8093         iwl4965_free_geos(priv);
8094
8095         if (priv->ibss_beacon)
8096                 dev_kfree_skb(priv->ibss_beacon);
8097
8098         ieee80211_free_hw(priv->hw);
8099 }
8100
8101 #ifdef CONFIG_PM
8102
8103 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8104 {
8105         struct iwl_priv *priv = pci_get_drvdata(pdev);
8106
8107         if (priv->is_open) {
8108                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8109                 iwl4965_mac_stop(priv->hw);
8110                 priv->is_open = 1;
8111         }
8112
8113         pci_set_power_state(pdev, PCI_D3hot);
8114
8115         return 0;
8116 }
8117
8118 static int iwl4965_pci_resume(struct pci_dev *pdev)
8119 {
8120         struct iwl_priv *priv = pci_get_drvdata(pdev);
8121
8122         pci_set_power_state(pdev, PCI_D0);
8123
8124         if (priv->is_open)
8125                 iwl4965_mac_start(priv->hw);
8126
8127         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8128         return 0;
8129 }
8130
8131 #endif /* CONFIG_PM */
8132
8133 /*****************************************************************************
8134  *
8135  * driver and module entry point
8136  *
8137  *****************************************************************************/
8138
8139 static struct pci_driver iwl4965_driver = {
8140         .name = DRV_NAME,
8141         .id_table = iwl4965_hw_card_ids,
8142         .probe = iwl4965_pci_probe,
8143         .remove = __devexit_p(iwl4965_pci_remove),
8144 #ifdef CONFIG_PM
8145         .suspend = iwl4965_pci_suspend,
8146         .resume = iwl4965_pci_resume,
8147 #endif
8148 };
8149
8150 static int __init iwl4965_init(void)
8151 {
8152
8153         int ret;
8154         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8155         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8156
8157         ret = iwl4965_rate_control_register();
8158         if (ret) {
8159                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8160                 return ret;
8161         }
8162
8163         ret = pci_register_driver(&iwl4965_driver);
8164         if (ret) {
8165                 IWL_ERROR("Unable to initialize PCI module\n");
8166                 goto error_register;
8167         }
8168 #ifdef CONFIG_IWLWIFI_DEBUG
8169         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8170         if (ret) {
8171                 IWL_ERROR("Unable to create driver sysfs file\n");
8172                 goto error_debug;
8173         }
8174 #endif
8175
8176         return ret;
8177
8178 #ifdef CONFIG_IWLWIFI_DEBUG
8179 error_debug:
8180         pci_unregister_driver(&iwl4965_driver);
8181 #endif
8182 error_register:
8183         iwl4965_rate_control_unregister();
8184         return ret;
8185 }
8186
8187 static void __exit iwl4965_exit(void)
8188 {
8189 #ifdef CONFIG_IWLWIFI_DEBUG
8190         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8191 #endif
8192         pci_unregister_driver(&iwl4965_driver);
8193         iwl4965_rate_control_unregister();
8194 }
8195
8196 module_exit(iwl4965_exit);
8197 module_init(iwl4965_init);