drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 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  *  Intel Linux Wireless <ilw@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/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #define DRV_NAME        "iwlagn"
  48
  49 #include "iwl-eeprom.h"
  50 #include "iwl-dev.h"
  51 #include "iwl-core.h"
  52 #include "iwl-io.h"
  53 #include "iwl-helpers.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-calib.h"
  56
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
  76 #define VS "s"
  77 #else
  78 #define VS
  79 #endif
  80
  81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("iwl4965");
  89
  90 /*************** STATION TABLE MANAGEMENT ****
  91  * mac80211 should be examined to determine if sta_info is duplicating
  92  * the functionality provided here
  93  */
  94
  95 /**************************************************************/
  96
  97
  98
  99 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 100 {
 101         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 102
 103         if (hw_decrypt)
 104                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 105         else
 106                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 107
 108 }
 109
 110 /**
 111  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 112  * @priv: staging_rxon is compared to active_rxon
 113  *
 114  * If the RXON structure is changing enough to require a new tune,
 115  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 116  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 117  */
 118 static int iwl_full_rxon_required(struct iwl_priv *priv)
 119 {
 120
 121         /* These items are only settable from the full RXON command */
 122         if (!(iwl_is_associated(priv)) ||
 123             compare_ether_addr(priv->staging_rxon.bssid_addr,
 124                                priv->active_rxon.bssid_addr) ||
 125             compare_ether_addr(priv->staging_rxon.node_addr,
 126                                priv->active_rxon.node_addr) ||
 127             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 128                                priv->active_rxon.wlap_bssid_addr) ||
 129             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 130             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 131             (priv->staging_rxon.air_propagation !=
 132              priv->active_rxon.air_propagation) ||
 133             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 134              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 135             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 136              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 137             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 138                 return 1;
 139
 140         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 141          * be updated with the RXON_ASSOC command -- however only some
 142          * flag transitions are allowed using RXON_ASSOC */
 143
 144         /* Check if we are not switching bands */
 145         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 146             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 147                 return 1;
 148
 149         /* Check if we are switching association toggle */
 150         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 151                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 152                 return 1;
 153
 154         return 0;
 155 }
 156
 157 /**
 158  * iwl_commit_rxon - commit staging_rxon to hardware
 159  *
 160  * The RXON command in staging_rxon is committed to the hardware and
 161  * the active_rxon structure is updated with the new data.  This
 162  * function correctly transitions out of the RXON_ASSOC_MSK state if
 163  * a HW tune is required based on the RXON structure changes.
 164  */
 165 static int iwl_commit_rxon(struct iwl_priv *priv)
 166 {
 167         /* cast away the const for active_rxon in this function */
 168         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 169         int ret;
 170         bool new_assoc =
 171                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 172
 173         if (!iwl_is_alive(priv))
 174                 return -EBUSY;
 175
 176         /* always get timestamp with Rx frame */
 177         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 178         /* allow CTS-to-self if possible. this is relevant only for
 179          * 5000, but will not damage 4965 */
 180         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 181
 182         ret = iwl_agn_check_rxon_cmd(priv);
 183         if (ret) {
 184                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 185                 return -EINVAL;
 186         }
 187
 188         /* If we don't need to send a full RXON, we can use
 189          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 190          * and other flags for the current radio configuration. */
 191         if (!iwl_full_rxon_required(priv)) {
 192                 ret = iwl_send_rxon_assoc(priv);
 193                 if (ret) {
 194                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 195                         return ret;
 196                 }
 197
 198                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 199                 return 0;
 200         }
 201
 202         /* station table will be cleared */
 203         priv->assoc_station_added = 0;
 204
 205         /* If we are currently associated and the new config requires
 206          * an RXON_ASSOC and the new config wants the associated mask enabled,
 207          * we must clear the associated from the active configuration
 208          * before we apply the new config */
 209         if (iwl_is_associated(priv) && new_assoc) {
 210                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 211                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 212
 213                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 214                                       sizeof(struct iwl_rxon_cmd),
 215                                       &priv->active_rxon);
 216
 217                 /* If the mask clearing failed then we set
 218                  * active_rxon back to what it was previously */
 219                 if (ret) {
 220                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 221                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 222                         return ret;
 223                 }
 224         }
 225
 226         IWL_DEBUG_INFO("Sending RXON\n"
 227                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 228                        "* channel = %d\n"
 229                        "* bssid = %pM\n",
 230                        (new_assoc ? "" : "out"),
 231                        le16_to_cpu(priv->staging_rxon.channel),
 232                        priv->staging_rxon.bssid_addr);
 233
 234         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 235
 236         /* Apply the new configuration
 237          * RXON unassoc clears the station table in uCode, send it before
 238          * we add the bcast station. If assoc bit is set, we will send RXON
 239          * after having added the bcast and bssid station.
 240          */
 241         if (!new_assoc) {
 242                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 243                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 244                 if (ret) {
 245                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 246                         return ret;
 247                 }
 248                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 249         }
 250
 251         iwl_clear_stations_table(priv);
 252
 253         if (!priv->error_recovering)
 254                 priv->start_calib = 0;
 255
 256         /* Add the broadcast address so we can send broadcast frames */
 257         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 258                                                 IWL_INVALID_STATION) {
 259                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 260                 return -EIO;
 261         }
 262
 263         /* If we have set the ASSOC_MSK and we are in BSS mode then
 264          * add the IWL_AP_ID to the station rate table */
 265         if (new_assoc) {
 266                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 267                         ret = iwl_rxon_add_station(priv,
 268                                            priv->active_rxon.bssid_addr, 1);
 269                         if (ret == IWL_INVALID_STATION) {
 270                                 IWL_ERR(priv,
 271                                         "Error adding AP address for TX.\n");
 272                                 return -EIO;
 273                         }
 274                         priv->assoc_station_added = 1;
 275                         if (priv->default_wep_key &&
 276                             iwl_send_static_wepkey_cmd(priv, 0))
 277                                 IWL_ERR(priv,
 278                                         "Could not send WEP static key.\n");
 279                 }
 280
 281                 /* Apply the new configuration
 282                  * RXON assoc doesn't clear the station table in uCode,
 283                  */
 284                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 285                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 286                 if (ret) {
 287                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 288                         return ret;
 289                 }
 290                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 291         }
 292
 293         iwl_init_sensitivity(priv);
 294
 295         /* If we issue a new RXON command which required a tune then we must
 296          * send a new TXPOWER command or we won't be able to Tx any frames */
 297         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 298         if (ret) {
 299                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 300                 return ret;
 301         }
 302
 303         return 0;
 304 }
 305
 306 void iwl_update_chain_flags(struct iwl_priv *priv)
 307 {
 308
 309         iwl_set_rxon_chain(priv);
 310         iwl_commit_rxon(priv);
 311 }
 312
 313 static int iwl_send_bt_config(struct iwl_priv *priv)
 314 {
 315         struct iwl_bt_cmd bt_cmd = {
 316                 .flags = 3,
 317                 .lead_time = 0xAA,
 318                 .max_kill = 1,
 319                 .kill_ack_mask = 0,
 320                 .kill_cts_mask = 0,
 321         };
 322
 323         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 324                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
 325 }
 326
 327 static void iwl_clear_free_frames(struct iwl_priv *priv)
 328 {
 329         struct list_head *element;
 330
 331         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
 332                        priv->frames_count);
 333
 334         while (!list_empty(&priv->free_frames)) {
 335                 element = priv->free_frames.next;
 336                 list_del(element);
 337                 kfree(list_entry(element, struct iwl_frame, list));
 338                 priv->frames_count--;
 339         }
 340
 341         if (priv->frames_count) {
 342                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 343                             priv->frames_count);
 344                 priv->frames_count = 0;
 345         }
 346 }
 347
 348 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 349 {
 350         struct iwl_frame *frame;
 351         struct list_head *element;
 352         if (list_empty(&priv->free_frames)) {
 353                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 354                 if (!frame) {
 355                         IWL_ERR(priv, "Could not allocate frame!\n");
 356                         return NULL;
 357                 }
 358
 359                 priv->frames_count++;
 360                 return frame;
 361         }
 362
 363         element = priv->free_frames.next;
 364         list_del(element);
 365         return list_entry(element, struct iwl_frame, list);
 366 }
 367
 368 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 369 {
 370         memset(frame, 0, sizeof(*frame));
 371         list_add(&frame->list, &priv->free_frames);
 372 }
 373
 374 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 375                                           struct ieee80211_hdr *hdr,
 376                                           int left)
 377 {
 378         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 379             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 380              (priv->iw_mode != NL80211_IFTYPE_AP)))
 381                 return 0;
 382
 383         if (priv->ibss_beacon->len > left)
 384                 return 0;
 385
 386         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 387
 388         return priv->ibss_beacon->len;
 389 }
 390
 391 static u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 392 {
 393         int i;
 394         int rate_mask;
 395
 396         /* Set rate mask*/
 397         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 398                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 399         else
 400                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 401
 402         /* Find lowest valid rate */
 403         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 404                                         i = iwl_rates[i].next_ieee) {
 405                 if (rate_mask & (1 << i))
 406                         return iwl_rates[i].plcp;
 407         }
 408
 409         /* No valid rate was found. Assign the lowest one */
 410         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 411                 return IWL_RATE_1M_PLCP;
 412         else
 413                 return IWL_RATE_6M_PLCP;
 414 }
 415
 416 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 417                                        struct iwl_frame *frame, u8 rate)
 418 {
 419         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 420         unsigned int frame_size;
 421
 422         tx_beacon_cmd = &frame->u.beacon;
 423         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 424
 425         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 426         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 427
 428         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 429                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 430
 431         BUG_ON(frame_size > MAX_MPDU_SIZE);
 432         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 433
 434         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 435                 tx_beacon_cmd->tx.rate_n_flags =
 436                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 437         else
 438                 tx_beacon_cmd->tx.rate_n_flags =
 439                         iwl_hw_set_rate_n_flags(rate, 0);
 440
 441         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 442                                      TX_CMD_FLG_TSF_MSK |
 443                                      TX_CMD_FLG_STA_RATE_MSK;
 444
 445         return sizeof(*tx_beacon_cmd) + frame_size;
 446 }
 447 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 448 {
 449         struct iwl_frame *frame;
 450         unsigned int frame_size;
 451         int rc;
 452         u8 rate;
 453
 454         frame = iwl_get_free_frame(priv);
 455
 456         if (!frame) {
 457                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 458                           "command.\n");
 459                 return -ENOMEM;
 460         }
 461
 462         rate = iwl_rate_get_lowest_plcp(priv);
 463
 464         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 465
 466         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 467                               &frame->u.cmd[0]);
 468
 469         iwl_free_frame(priv, frame);
 470
 471         return rc;
 472 }
 473
 474 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 475 {
 476         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 477
 478         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 479         if (sizeof(dma_addr_t) > sizeof(u32))
 480                 addr |=
 481                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 482
 483         return addr;
 484 }
 485
 486 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 487 {
 488         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 489
 490         return le16_to_cpu(tb->hi_n_len) >> 4;
 491 }
 492
 493 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 494                                   dma_addr_t addr, u16 len)
 495 {
 496         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 497         u16 hi_n_len = len << 4;
 498
 499         put_unaligned_le32(addr, &tb->lo);
 500         if (sizeof(dma_addr_t) > sizeof(u32))
 501                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 502
 503         tb->hi_n_len = cpu_to_le16(hi_n_len);
 504
 505         tfd->num_tbs = idx + 1;
 506 }
 507
 508 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 509 {
 510         return tfd->num_tbs & 0x1f;
 511 }
 512
 513 /**
 514  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 515  * @priv - driver private data
 516  * @txq - tx queue
 517  *
 518  * Does NOT advance any TFD circular buffer read/write indexes
 519  * Does NOT free the TFD itself (which is within circular buffer)
 520  */
 521 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 522 {
 523         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 524         struct iwl_tfd *tfd;
 525         struct pci_dev *dev = priv->pci_dev;
 526         int index = txq->q.read_ptr;
 527         int i;
 528         int num_tbs;
 529
 530         tfd = &tfd_tmp[index];
 531
 532         /* Sanity check on number of chunks */
 533         num_tbs = iwl_tfd_get_num_tbs(tfd);
 534
 535         if (num_tbs >= IWL_NUM_OF_TBS) {
 536                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 537                 /* @todo issue fatal error, it is quite serious situation */
 538                 return;
 539         }
 540
 541         /* Unmap tx_cmd */
 542         if (num_tbs)
 543                 pci_unmap_single(dev,
 544                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
 545                                 pci_unmap_len(&txq->cmd[index]->meta, len),
 546                                 PCI_DMA_TODEVICE);
 547
 548         /* Unmap chunks, if any. */
 549         for (i = 1; i < num_tbs; i++) {
 550                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 551                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 552
 553                 if (txq->txb) {
 554                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 555                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 556                 }
 557         }
 558 }
 559
 560 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 561                                  struct iwl_tx_queue *txq,
 562                                  dma_addr_t addr, u16 len,
 563                                  u8 reset, u8 pad)
 564 {
 565         struct iwl_queue *q;
 566         struct iwl_tfd *tfd, *tfd_tmp;
 567         u32 num_tbs;
 568
 569         q = &txq->q;
 570         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 571         tfd = &tfd_tmp[q->write_ptr];
 572
 573         if (reset)
 574                 memset(tfd, 0, sizeof(*tfd));
 575
 576         num_tbs = iwl_tfd_get_num_tbs(tfd);
 577
 578         /* Each TFD can point to a maximum 20 Tx buffers */
 579         if (num_tbs >= IWL_NUM_OF_TBS) {
 580                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 581                           IWL_NUM_OF_TBS);
 582                 return -EINVAL;
 583         }
 584
 585         BUG_ON(addr & ~DMA_BIT_MASK(36));
 586         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 587                 IWL_ERR(priv, "Unaligned address = %llx\n",
 588                           (unsigned long long)addr);
 589
 590         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 591
 592         return 0;
 593 }
 594
 595 /******************************************************************************
 596  *
 597  * Misc. internal state and helper functions
 598  *
 599  ******************************************************************************/
 600
 601 static void iwl_ht_conf(struct iwl_priv *priv,
 602                             struct ieee80211_bss_conf *bss_conf)
 603 {
 604         struct ieee80211_sta_ht_cap *ht_conf;
 605         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
 606         struct ieee80211_sta *sta;
 607
 608         IWL_DEBUG_MAC80211("enter: \n");
 609
 610         if (!iwl_conf->is_ht)
 611                 return;
 612
 613
 614         /*
 615          * It is totally wrong to base global information on something
 616          * that is valid only when associated, alas, this driver works
 617          * that way and I don't know how to fix it.
 618          */
 619
 620         rcu_read_lock();
 621         sta = ieee80211_find_sta(priv->hw, priv->bssid);
 622         if (!sta) {
 623                 rcu_read_unlock();
 624                 return;
 625         }
 626         ht_conf = &sta->ht_cap;
 627
 628         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
 629                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
 630         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
 631                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
 632
 633         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
 634         iwl_conf->max_amsdu_size =
 635                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
 636
 637         iwl_conf->supported_chan_width =
 638                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
 639
 640         /*
 641          * XXX: The HT configuration needs to be moved into iwl_mac_config()
 642          *      to be done there correctly.
 643          */
 644
 645         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 646         if (conf_is_ht40_minus(&priv->hw->conf))
 647                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 648         else if (conf_is_ht40_plus(&priv->hw->conf))
 649                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 650
 651         /* If no above or below channel supplied disable FAT channel */
 652         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
 653             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 654                 iwl_conf->supported_chan_width = 0;
 655
 656         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
 657
 658         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
 659
 660         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
 661         iwl_conf->ht_protection =
 662                 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
 663         iwl_conf->non_GF_STA_present =
 664                 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 665
 666         rcu_read_unlock();
 667
 668         IWL_DEBUG_MAC80211("leave\n");
 669 }
 670
 671 /*
 672  * QoS  support
 673 */
 674 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 675 {
 676         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 677                 return;
 678
 679         priv->qos_data.def_qos_parm.qos_flags = 0;
 680
 681         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 682             !priv->qos_data.qos_cap.q_AP.txop_request)
 683                 priv->qos_data.def_qos_parm.qos_flags |=
 684                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 685         if (priv->qos_data.qos_active)
 686                 priv->qos_data.def_qos_parm.qos_flags |=
 687                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 688
 689         if (priv->current_ht_config.is_ht)
 690                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 691
 692         if (force || iwl_is_associated(priv)) {
 693                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 694                                 priv->qos_data.qos_active,
 695                                 priv->qos_data.def_qos_parm.qos_flags);
 696
 697                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 698                                        sizeof(struct iwl_qosparam_cmd),
 699                                        &priv->qos_data.def_qos_parm, NULL);
 700         }
 701 }
 702
 703 #define MAX_UCODE_BEACON_INTERVAL       4096
 704
 705 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 706 {
 707         u16 new_val = 0;
 708         u16 beacon_factor = 0;
 709
 710         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 711                                         / MAX_UCODE_BEACON_INTERVAL;
 712         new_val = beacon_val / beacon_factor;
 713
 714         return new_val;
 715 }
 716
 717 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 718 {
 719         u64 tsf;
 720         s32 interval_tm, rem;
 721         unsigned long flags;
 722         struct ieee80211_conf *conf = NULL;
 723         u16 beacon_int = 0;
 724
 725         conf = ieee80211_get_hw_conf(priv->hw);
 726
 727         spin_lock_irqsave(&priv->lock, flags);
 728         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 729         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 730
 731         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 732                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 733                 priv->rxon_timing.atim_window = 0;
 734         } else {
 735                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 736
 737                 /* TODO: we need to get atim_window from upper stack
 738                  * for now we set to 0 */
 739                 priv->rxon_timing.atim_window = 0;
 740         }
 741
 742         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 743
 744         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 745         interval_tm = beacon_int * 1024;
 746         rem = do_div(tsf, interval_tm);
 747         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 748
 749         spin_unlock_irqrestore(&priv->lock, flags);
 750         IWL_DEBUG_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
 751                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 752                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 753                         le16_to_cpu(priv->rxon_timing.atim_window));
 754 }
 755
 756 static void iwl_set_flags_for_band(struct iwl_priv *priv,
 757                                    enum ieee80211_band band)
 758 {
 759         if (band == IEEE80211_BAND_5GHZ) {
 760                 priv->staging_rxon.flags &=
 761                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 762                       | RXON_FLG_CCK_MSK);
 763                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 764         } else {
 765                 /* Copied from iwl_post_associate() */
 766                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 767                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 768                 else
 769                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 770
 771                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
 772                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 773
 774                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 775                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 776                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 777         }
 778 }
 779
 780 /*
 781  * initialize rxon structure with default values from eeprom
 782  */
 783 static void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
 784 {
 785         const struct iwl_channel_info *ch_info;
 786
 787         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 788
 789         switch (mode) {
 790         case NL80211_IFTYPE_AP:
 791                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 792                 break;
 793
 794         case NL80211_IFTYPE_STATION:
 795                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 796                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 797                 break;
 798
 799         case NL80211_IFTYPE_ADHOC:
 800                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 801                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 802                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 803                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 804                 break;
 805
 806         case NL80211_IFTYPE_MONITOR:
 807                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
 808                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
 809                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
 810                 break;
 811         default:
 812                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
 813                 break;
 814         }
 815
 816 #if 0
 817         /* TODO:  Figure out when short_preamble would be set and cache from
 818          * that */
 819         if (!hw_to_local(priv->hw)->short_preamble)
 820                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 821         else
 822                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 823 #endif
 824
 825         ch_info = iwl_get_channel_info(priv, priv->band,
 826                                        le16_to_cpu(priv->active_rxon.channel));
 827
 828         if (!ch_info)
 829                 ch_info = &priv->channel_info[0];
 830
 831         /*
 832          * in some case A channels are all non IBSS
 833          * in this case force B/G channel
 834          */
 835         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
 836             !(is_channel_ibss(ch_info)))
 837                 ch_info = &priv->channel_info[0];
 838
 839         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
 840         priv->band = ch_info->band;
 841
 842         iwl_set_flags_for_band(priv, priv->band);
 843
 844         priv->staging_rxon.ofdm_basic_rates =
 845             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 846         priv->staging_rxon.cck_basic_rates =
 847             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 848
 849         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 850                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 851         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 852         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
 853         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
 854         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
 855         iwl_set_rxon_chain(priv);
 856 }
 857
 858 static int iwl_set_mode(struct iwl_priv *priv, int mode)
 859 {
 860         iwl_connection_init_rx_config(priv, mode);
 861         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 862
 863         iwl_clear_stations_table(priv);
 864
 865         /* dont commit rxon if rf-kill is on*/
 866         if (!iwl_is_ready_rf(priv))
 867                 return -EAGAIN;
 868
 869         cancel_delayed_work(&priv->scan_check);
 870         if (iwl_scan_cancel_timeout(priv, 100)) {
 871                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
 872                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
 873                 return -EAGAIN;
 874         }
 875
 876         iwl_commit_rxon(priv);
 877
 878         return 0;
 879 }
 880
 881 static void iwl_set_rate(struct iwl_priv *priv)
 882 {
 883         const struct ieee80211_supported_band *hw = NULL;
 884         struct ieee80211_rate *rate;
 885         int i;
 886
 887         hw = iwl_get_hw_mode(priv, priv->band);
 888         if (!hw) {
 889                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 890                 return;
 891         }
 892
 893         priv->active_rate = 0;
 894         priv->active_rate_basic = 0;
 895
 896         for (i = 0; i < hw->n_bitrates; i++) {
 897                 rate = &(hw->bitrates[i]);
 898                 if (rate->hw_value < IWL_RATE_COUNT)
 899                         priv->active_rate |= (1 << rate->hw_value);
 900         }
 901
 902         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
 903                        priv->active_rate, priv->active_rate_basic);
 904
 905         /*
 906          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
 907          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
 908          * OFDM
 909          */
 910         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
 911                 priv->staging_rxon.cck_basic_rates =
 912                     ((priv->active_rate_basic &
 913                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
 914         else
 915                 priv->staging_rxon.cck_basic_rates =
 916                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 917
 918         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
 919                 priv->staging_rxon.ofdm_basic_rates =
 920                     ((priv->active_rate_basic &
 921                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
 922                       IWL_FIRST_OFDM_RATE) & 0xFF;
 923         else
 924                 priv->staging_rxon.ofdm_basic_rates =
 925                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 926 }
 927
 928
 929 /******************************************************************************
 930  *
 931  * Generic RX handler implementations
 932  *
 933  ******************************************************************************/
 934 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 935                                 struct iwl_rx_mem_buffer *rxb)
 936 {
 937         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 938         struct iwl_alive_resp *palive;
 939         struct delayed_work *pwork;
 940
 941         palive = &pkt->u.alive_frame;
 942
 943         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
 944                        "0x%01X 0x%01X\n",
 945                        palive->is_valid, palive->ver_type,
 946                        palive->ver_subtype);
 947
 948         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 949                 IWL_DEBUG_INFO("Initialization Alive received.\n");
 950                 memcpy(&priv->card_alive_init,
 951                        &pkt->u.alive_frame,
 952                        sizeof(struct iwl_init_alive_resp));
 953                 pwork = &priv->init_alive_start;
 954         } else {
 955                 IWL_DEBUG_INFO("Runtime Alive received.\n");
 956                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 957                        sizeof(struct iwl_alive_resp));
 958                 pwork = &priv->alive_start;
 959         }
 960
 961         /* We delay the ALIVE response by 5ms to
 962          * give the HW RF Kill time to activate... */
 963         if (palive->is_valid == UCODE_VALID_OK)
 964                 queue_delayed_work(priv->workqueue, pwork,
 965                                    msecs_to_jiffies(5));
 966         else
 967                 IWL_WARN(priv, "uCode did not respond OK.\n");
 968 }
 969
 970 static void iwl_rx_reply_error(struct iwl_priv *priv,
 971                                    struct iwl_rx_mem_buffer *rxb)
 972 {
 973         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 974
 975         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
 976                 "seq 0x%04X ser 0x%08X\n",
 977                 le32_to_cpu(pkt->u.err_resp.error_type),
 978                 get_cmd_string(pkt->u.err_resp.cmd_id),
 979                 pkt->u.err_resp.cmd_id,
 980                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
 981                 le32_to_cpu(pkt->u.err_resp.error_info));
 982 }
 983
 984 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
 985
 986 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 987 {
 988         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 989         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
 990         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
 991         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
 992                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
 993         rxon->channel = csa->channel;
 994         priv->staging_rxon.channel = csa->channel;
 995 }
 996
 997 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
 998                                       struct iwl_rx_mem_buffer *rxb)
 999 {
1000 #ifdef CONFIG_IWLWIFI_DEBUG
1001         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1002         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1003         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
1004                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1005 #endif
1006 }
1007
1008 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1009                                              struct iwl_rx_mem_buffer *rxb)
1010 {
1011         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1012         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
1013                         "notification for %s:\n",
1014                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
1015         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
1016 }
1017
1018 static void iwl_bg_beacon_update(struct work_struct *work)
1019 {
1020         struct iwl_priv *priv =
1021                 container_of(work, struct iwl_priv, beacon_update);
1022         struct sk_buff *beacon;
1023
1024         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
1025         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
1026
1027         if (!beacon) {
1028                 IWL_ERR(priv, "update beacon failed\n");
1029                 return;
1030         }
1031
1032         mutex_lock(&priv->mutex);
1033         /* new beacon skb is allocated every time; dispose previous.*/
1034         if (priv->ibss_beacon)
1035                 dev_kfree_skb(priv->ibss_beacon);
1036
1037         priv->ibss_beacon = beacon;
1038         mutex_unlock(&priv->mutex);
1039
1040         iwl_send_beacon_cmd(priv);
1041 }
1042
1043 /**
1044  * iwl_bg_statistics_periodic - Timer callback to queue statistics
1045  *
1046  * This callback is provided in order to send a statistics request.
1047  *
1048  * This timer function is continually reset to execute within
1049  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
1050  * was received.  We need to ensure we receive the statistics in order
1051  * to update the temperature used for calibrating the TXPOWER.
1052  */
1053 static void iwl_bg_statistics_periodic(unsigned long data)
1054 {
1055         struct iwl_priv *priv = (struct iwl_priv *)data;
1056
1057         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1058                 return;
1059
1060         /* dont send host command if rf-kill is on */
1061         if (!iwl_is_ready_rf(priv))
1062                 return;
1063
1064         iwl_send_statistics_request(priv, CMD_ASYNC);
1065 }
1066
1067 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
1068                                 struct iwl_rx_mem_buffer *rxb)
1069 {
1070 #ifdef CONFIG_IWLWIFI_DEBUG
1071         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1072         struct iwl4965_beacon_notif *beacon =
1073                 (struct iwl4965_beacon_notif *)pkt->u.raw;
1074         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
1075
1076         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
1077                 "tsf %d %d rate %d\n",
1078                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
1079                 beacon->beacon_notify_hdr.failure_frame,
1080                 le32_to_cpu(beacon->ibss_mgr_status),
1081                 le32_to_cpu(beacon->high_tsf),
1082                 le32_to_cpu(beacon->low_tsf), rate);
1083 #endif
1084
1085         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
1086             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1087                 queue_work(priv->workqueue, &priv->beacon_update);
1088 }
1089
1090 /* Handle notification from uCode that card's power state is changing
1091  * due to software, hardware, or critical temperature RFKILL */
1092 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
1093                                     struct iwl_rx_mem_buffer *rxb)
1094 {
1095         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1096         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1097         unsigned long status = priv->status;
1098
1099         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
1100                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1101                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1102
1103         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
1104                      RF_CARD_DISABLED)) {
1105
1106                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1107                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1108
1109                 if (!iwl_grab_nic_access(priv)) {
1110                         iwl_write_direct32(
1111                                 priv, HBUS_TARG_MBX_C,
1112                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1113
1114                         iwl_release_nic_access(priv);
1115                 }
1116
1117                 if (!(flags & RXON_CARD_DISABLED)) {
1118                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1119                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1120                         if (!iwl_grab_nic_access(priv)) {
1121                                 iwl_write_direct32(
1122                                         priv, HBUS_TARG_MBX_C,
1123                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1124
1125                                 iwl_release_nic_access(priv);
1126                         }
1127                 }
1128
1129                 if (flags & RF_CARD_DISABLED) {
1130                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1131                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1132                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1133                         if (!iwl_grab_nic_access(priv))
1134                                 iwl_release_nic_access(priv);
1135                 }
1136         }
1137
1138         if (flags & HW_CARD_DISABLED)
1139                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1140         else
1141                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1142
1143
1144         if (flags & SW_CARD_DISABLED)
1145                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1146         else
1147                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1148
1149         if (!(flags & RXON_CARD_DISABLED))
1150                 iwl_scan_cancel(priv);
1151
1152         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1153              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1154             (test_bit(STATUS_RF_KILL_SW, &status) !=
1155              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1156                 queue_work(priv->workqueue, &priv->rf_kill);
1157         else
1158                 wake_up_interruptible(&priv->wait_command_queue);
1159 }
1160
1161 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
1162 {
1163         int ret;
1164         unsigned long flags;
1165
1166         spin_lock_irqsave(&priv->lock, flags);
1167         ret = iwl_grab_nic_access(priv);
1168         if (ret)
1169                 goto err;
1170
1171         if (src == IWL_PWR_SRC_VAUX) {
1172                 u32 val;
1173                 ret = pci_read_config_dword(priv->pci_dev, PCI_CFG_POWER_SOURCE,
1174                                             &val);
1175
1176                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
1177                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1178                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
1179                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
1180         } else {
1181                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1182                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
1183                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
1184         }
1185
1186         iwl_release_nic_access(priv);
1187 err:
1188         spin_unlock_irqrestore(&priv->lock, flags);
1189         return ret;
1190 }
1191
1192 /**
1193  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1194  *
1195  * Setup the RX handlers for each of the reply types sent from the uCode
1196  * to the host.
1197  *
1198  * This function chains into the hardware specific files for them to setup
1199  * any hardware specific handlers as well.
1200  */
1201 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
1202 {
1203         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
1204         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1205         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1206         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1207         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1208             iwl_rx_pm_debug_statistics_notif;
1209         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
1210
1211         /*
1212          * The same handler is used for both the REPLY to a discrete
1213          * statistics request from the host as well as for the periodic
1214          * statistics notifications (after received beacons) from the uCode.
1215          */
1216         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
1217         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
1218
1219         iwl_setup_spectrum_handlers(priv);
1220         iwl_setup_rx_scan_handlers(priv);
1221
1222         /* status change handler */
1223         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
1224
1225         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
1226             iwl_rx_missed_beacon_notif;
1227         /* Rx handlers */
1228         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
1229         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
1230         /* block ack */
1231         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
1232         /* Set up hardware specific Rx handlers */
1233         priv->cfg->ops->lib->rx_handler_setup(priv);
1234 }
1235
1236 /**
1237  * iwl_rx_handle - Main entry function for receiving responses from uCode
1238  *
1239  * Uses the priv->rx_handlers callback function array to invoke
1240  * the appropriate handlers, including command responses,
1241  * frame-received notifications, and other notifications.
1242  */
1243 void iwl_rx_handle(struct iwl_priv *priv)
1244 {
1245         struct iwl_rx_mem_buffer *rxb;
1246         struct iwl_rx_packet *pkt;
1247         struct iwl_rx_queue *rxq = &priv->rxq;
1248         u32 r, i;
1249         int reclaim;
1250         unsigned long flags;
1251         u8 fill_rx = 0;
1252         u32 count = 8;
1253
1254         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1255          * buffer that the driver may process (last buffer filled by ucode). */
1256         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1257         i = rxq->read;
1258
1259         /* Rx interrupt, but nothing sent from uCode */
1260         if (i == r)
1261                 IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i);
1262
1263         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1264                 fill_rx = 1;
1265
1266         while (i != r) {
1267                 rxb = rxq->queue[i];
1268
1269                 /* If an RXB doesn't have a Rx queue slot associated with it,
1270                  * then a bug has been introduced in the queue refilling
1271                  * routines -- catch it here */
1272                 BUG_ON(rxb == NULL);
1273
1274                 rxq->queue[i] = NULL;
1275
1276                 dma_sync_single_range_for_cpu(
1277                                 &priv->pci_dev->dev, rxb->real_dma_addr,
1278                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
1279                                 priv->hw_params.rx_buf_size,
1280                                 PCI_DMA_FROMDEVICE);
1281                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1282
1283                 /* Reclaim a command buffer only if this packet is a response
1284                  *   to a (driver-originated) command.
1285                  * If the packet (e.g. Rx frame) originated from uCode,
1286                  *   there is no command buffer to reclaim.
1287                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1288                  *   but apparently a few don't get set; catch them here. */
1289                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1290                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1291                         (pkt->hdr.cmd != REPLY_RX) &&
1292                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1293                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1294                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1295                         (pkt->hdr.cmd != REPLY_TX);
1296
1297                 /* Based on type of command response or notification,
1298                  *   handle those that need handling via function in
1299                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1300                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1301                         IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r,
1302                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1303                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1304                 } else {
1305                         /* No handling needed */
1306                         IWL_DEBUG(IWL_DL_RX,
1307                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1308                                 r, i, get_cmd_string(pkt->hdr.cmd),
1309                                 pkt->hdr.cmd);
1310                 }
1311
1312                 if (reclaim) {
1313                         /* Invoke any callbacks, transfer the skb to caller, and
1314                          * fire off the (possibly) blocking iwl_send_cmd()
1315                          * as we reclaim the driver command queue */
1316                         if (rxb && rxb->skb)
1317                                 iwl_tx_cmd_complete(priv, rxb);
1318                         else
1319                                 IWL_WARN(priv, "Claim null rxb?\n");
1320                 }
1321
1322                 /* For now we just don't re-use anything.  We can tweak this
1323                  * later to try and re-use notification packets and SKBs that
1324                  * fail to Rx correctly */
1325                 if (rxb->skb != NULL) {
1326                         priv->alloc_rxb_skb--;
1327                         dev_kfree_skb_any(rxb->skb);
1328                         rxb->skb = NULL;
1329                 }
1330
1331                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1332                                  priv->hw_params.rx_buf_size + 256,
1333                                  PCI_DMA_FROMDEVICE);
1334                 spin_lock_irqsave(&rxq->lock, flags);
1335                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1336                 spin_unlock_irqrestore(&rxq->lock, flags);
1337                 i = (i + 1) & RX_QUEUE_MASK;
1338                 /* If there are a lot of unused frames,
1339                  * restock the Rx queue so ucode wont assert. */
1340                 if (fill_rx) {
1341                         count++;
1342                         if (count >= 8) {
1343                                 priv->rxq.read = i;
1344                                 iwl_rx_queue_restock(priv);
1345                                 count = 0;
1346                         }
1347                 }
1348         }
1349
1350         /* Backtrack one entry */
1351         priv->rxq.read = i;
1352         iwl_rx_queue_restock(priv);
1353 }
1354
1355 #ifdef CONFIG_IWLWIFI_DEBUG
1356 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1357 {
1358         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1359
1360         IWL_DEBUG_RADIO("RX CONFIG:\n");
1361         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1362         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1363         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1364         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
1365                         le32_to_cpu(rxon->filter_flags));
1366         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
1367         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
1368                         rxon->ofdm_basic_rates);
1369         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1370         IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
1371         IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1372         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1373 }
1374 #endif
1375
1376 /* call this function to flush any scheduled tasklet */
1377 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1378 {
1379         /* wait to make sure we flush pending tasklet*/
1380         synchronize_irq(priv->pci_dev->irq);
1381         tasklet_kill(&priv->irq_tasklet);
1382 }
1383
1384 /**
1385  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1386  */
1387 static void iwl_irq_handle_error(struct iwl_priv *priv)
1388 {
1389         /* Set the FW error flag -- cleared on iwl_down */
1390         set_bit(STATUS_FW_ERROR, &priv->status);
1391
1392         /* Cancel currently queued command. */
1393         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1394
1395 #ifdef CONFIG_IWLWIFI_DEBUG
1396         if (priv->debug_level & IWL_DL_FW_ERRORS) {
1397                 iwl_dump_nic_error_log(priv);
1398                 iwl_dump_nic_event_log(priv);
1399                 iwl_print_rx_config_cmd(priv);
1400         }
1401 #endif
1402
1403         wake_up_interruptible(&priv->wait_command_queue);
1404
1405         /* Keep the restart process from trying to send host
1406          * commands by clearing the INIT status bit */
1407         clear_bit(STATUS_READY, &priv->status);
1408
1409         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1410                 IWL_DEBUG(IWL_DL_FW_ERRORS,
1411                           "Restarting adapter due to uCode error.\n");
1412
1413                 if (iwl_is_associated(priv)) {
1414                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
1415                                sizeof(priv->recovery_rxon));
1416                         priv->error_recovering = 1;
1417                 }
1418                 if (priv->cfg->mod_params->restart_fw)
1419                         queue_work(priv->workqueue, &priv->restart);
1420         }
1421 }
1422
1423 static void iwl_error_recovery(struct iwl_priv *priv)
1424 {
1425         unsigned long flags;
1426
1427         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1428                sizeof(priv->staging_rxon));
1429         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1430         iwl_commit_rxon(priv);
1431
1432         iwl_rxon_add_station(priv, priv->bssid, 1);
1433
1434         spin_lock_irqsave(&priv->lock, flags);
1435         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1436         priv->error_recovering = 0;
1437         spin_unlock_irqrestore(&priv->lock, flags);
1438 }
1439
1440 static void iwl_irq_tasklet(struct iwl_priv *priv)
1441 {
1442         u32 inta, handled = 0;
1443         u32 inta_fh;
1444         unsigned long flags;
1445 #ifdef CONFIG_IWLWIFI_DEBUG
1446         u32 inta_mask;
1447 #endif
1448
1449         spin_lock_irqsave(&priv->lock, flags);
1450
1451         /* Ack/clear/reset pending uCode interrupts.
1452          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1453          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1454         inta = iwl_read32(priv, CSR_INT);
1455         iwl_write32(priv, CSR_INT, inta);
1456
1457         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1458          * Any new interrupts that happen after this, either while we're
1459          * in this tasklet, or later, will show up in next ISR/tasklet. */
1460         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1461         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1462
1463 #ifdef CONFIG_IWLWIFI_DEBUG
1464         if (priv->debug_level & IWL_DL_ISR) {
1465                 /* just for debug */
1466                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1467                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1468                               inta, inta_mask, inta_fh);
1469         }
1470 #endif
1471
1472         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1473          * atomic, make sure that inta covers all the interrupts that
1474          * we've discovered, even if FH interrupt came in just after
1475          * reading CSR_INT. */
1476         if (inta_fh & CSR49_FH_INT_RX_MASK)
1477                 inta |= CSR_INT_BIT_FH_RX;
1478         if (inta_fh & CSR49_FH_INT_TX_MASK)
1479                 inta |= CSR_INT_BIT_FH_TX;
1480
1481         /* Now service all interrupt bits discovered above. */
1482         if (inta & CSR_INT_BIT_HW_ERR) {
1483                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1484
1485                 /* Tell the device to stop sending interrupts */
1486                 iwl_disable_interrupts(priv);
1487
1488                 iwl_irq_handle_error(priv);
1489
1490                 handled |= CSR_INT_BIT_HW_ERR;
1491
1492                 spin_unlock_irqrestore(&priv->lock, flags);
1493
1494                 return;
1495         }
1496
1497 #ifdef CONFIG_IWLWIFI_DEBUG
1498         if (priv->debug_level & (IWL_DL_ISR)) {
1499                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1500                 if (inta & CSR_INT_BIT_SCD)
1501                         IWL_DEBUG_ISR("Scheduler finished to transmit "
1502                                       "the frame/frames.\n");
1503
1504                 /* Alive notification via Rx interrupt will do the real work */
1505                 if (inta & CSR_INT_BIT_ALIVE)
1506                         IWL_DEBUG_ISR("Alive interrupt\n");
1507         }
1508 #endif
1509         /* Safely ignore these bits for debug checks below */
1510         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1511
1512         /* HW RF KILL switch toggled */
1513         if (inta & CSR_INT_BIT_RF_KILL) {
1514                 int hw_rf_kill = 0;
1515                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1516                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1517                         hw_rf_kill = 1;
1518
1519                 IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n",
1520                                 hw_rf_kill ? "disable radio" : "enable radio");
1521
1522                 /* driver only loads ucode once setting the interface up.
1523                  * the driver allows loading the ucode even if the radio
1524                  * is killed. Hence update the killswitch state here. The
1525                  * rfkill handler will care about restarting if needed.
1526                  */
1527                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1528                         if (hw_rf_kill)
1529                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1530                         else
1531                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1532                         queue_work(priv->workqueue, &priv->rf_kill);
1533                 }
1534
1535                 handled |= CSR_INT_BIT_RF_KILL;
1536         }
1537
1538         /* Chip got too hot and stopped itself */
1539         if (inta & CSR_INT_BIT_CT_KILL) {
1540                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1541                 handled |= CSR_INT_BIT_CT_KILL;
1542         }
1543
1544         /* Error detected by uCode */
1545         if (inta & CSR_INT_BIT_SW_ERR) {
1546                 IWL_ERR(priv, "Microcode SW error detected. "
1547                         " Restarting 0x%X.\n", inta);
1548                 iwl_irq_handle_error(priv);
1549                 handled |= CSR_INT_BIT_SW_ERR;
1550         }
1551
1552         /* uCode wakes up after power-down sleep */
1553         if (inta & CSR_INT_BIT_WAKEUP) {
1554                 IWL_DEBUG_ISR("Wakeup interrupt\n");
1555                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1556                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1557                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1558                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1559                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1560                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1561                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1562
1563                 handled |= CSR_INT_BIT_WAKEUP;
1564         }
1565
1566         /* All uCode command responses, including Tx command responses,
1567          * Rx "responses" (frame-received notification), and other
1568          * notifications from uCode come through here*/
1569         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1570                 iwl_rx_handle(priv);
1571                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1572         }
1573
1574         if (inta & CSR_INT_BIT_FH_TX) {
1575                 IWL_DEBUG_ISR("Tx interrupt\n");
1576                 handled |= CSR_INT_BIT_FH_TX;
1577                 /* FH finished to write, send event */
1578                 priv->ucode_write_complete = 1;
1579                 wake_up_interruptible(&priv->wait_command_queue);
1580         }
1581
1582         if (inta & ~handled)
1583                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1584
1585         if (inta & ~CSR_INI_SET_MASK) {
1586                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1587                          inta & ~CSR_INI_SET_MASK);
1588                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1589         }
1590
1591         /* Re-enable all interrupts */
1592         /* only Re-enable if diabled by irq */
1593         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1594                 iwl_enable_interrupts(priv);
1595
1596 #ifdef CONFIG_IWLWIFI_DEBUG
1597         if (priv->debug_level & (IWL_DL_ISR)) {
1598                 inta = iwl_read32(priv, CSR_INT);
1599                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1600                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1601                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1602                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1603         }
1604 #endif
1605         spin_unlock_irqrestore(&priv->lock, flags);
1606 }
1607
1608 static irqreturn_t iwl_isr(int irq, void *data)
1609 {
1610         struct iwl_priv *priv = data;
1611         u32 inta, inta_mask;
1612         u32 inta_fh;
1613         if (!priv)
1614                 return IRQ_NONE;
1615
1616         spin_lock(&priv->lock);
1617
1618         /* Disable (but don't clear!) interrupts here to avoid
1619          *    back-to-back ISRs and sporadic interrupts from our NIC.
1620          * If we have something to service, the tasklet will re-enable ints.
1621          * If we *don't* have something, we'll re-enable before leaving here. */
1622         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1623         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1624
1625         /* Discover which interrupts are active/pending */
1626         inta = iwl_read32(priv, CSR_INT);
1627         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1628
1629         /* Ignore interrupt if there's nothing in NIC to service.
1630          * This may be due to IRQ shared with another device,
1631          * or due to sporadic interrupts thrown from our NIC. */
1632         if (!inta && !inta_fh) {
1633                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
1634                 goto none;
1635         }
1636
1637         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1638                 /* Hardware disappeared. It might have already raised
1639                  * an interrupt */
1640                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1641                 goto unplugged;
1642         }
1643
1644         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1645                       inta, inta_mask, inta_fh);
1646
1647         inta &= ~CSR_INT_BIT_SCD;
1648
1649         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1650         if (likely(inta || inta_fh))
1651                 tasklet_schedule(&priv->irq_tasklet);
1652
1653  unplugged:
1654         spin_unlock(&priv->lock);
1655         return IRQ_HANDLED;
1656
1657  none:
1658         /* re-enable interrupts here since we don't have anything to service. */
1659         /* only Re-enable if diabled by irq */
1660         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1661                 iwl_enable_interrupts(priv);
1662         spin_unlock(&priv->lock);
1663         return IRQ_NONE;
1664 }
1665
1666 /******************************************************************************
1667  *
1668  * uCode download functions
1669  *
1670  ******************************************************************************/
1671
1672 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1673 {
1674         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1675         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1676         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1677         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1678         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1679         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1680 }
1681
1682 static void iwl_nic_start(struct iwl_priv *priv)
1683 {
1684         /* Remove all resets to allow NIC to operate */
1685         iwl_write32(priv, CSR_RESET, 0);
1686 }
1687
1688
1689 /**
1690  * iwl_read_ucode - Read uCode images from disk file.
1691  *
1692  * Copy into buffers for card to fetch via bus-mastering
1693  */
1694 static int iwl_read_ucode(struct iwl_priv *priv)
1695 {
1696         struct iwl_ucode *ucode;
1697         int ret = -EINVAL, index;
1698         const struct firmware *ucode_raw;
1699         const char *name_pre = priv->cfg->fw_name_pre;
1700         const unsigned int api_max = priv->cfg->ucode_api_max;
1701         const unsigned int api_min = priv->cfg->ucode_api_min;
1702         char buf[25];
1703         u8 *src;
1704         size_t len;
1705         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1706
1707         /* Ask kernel firmware_class module to get the boot firmware off disk.
1708          * request_firmware() is synchronous, file is in memory on return. */
1709         for (index = api_max; index >= api_min; index--) {
1710                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1711                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1712                 if (ret < 0) {
1713                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1714                                   buf, ret);
1715                         if (ret == -ENOENT)
1716                                 continue;
1717                         else
1718                                 goto error;
1719                 } else {
1720                         if (index < api_max)
1721                                 IWL_ERR(priv, "Loaded firmware %s, "
1722                                         "which is deprecated. "
1723                                         "Please use API v%u instead.\n",
1724                                           buf, api_max);
1725
1726                         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
1727                                        buf, ucode_raw->size);
1728                         break;
1729                 }
1730         }
1731
1732         if (ret < 0)
1733                 goto error;
1734
1735         /* Make sure that we got at least our header! */
1736         if (ucode_raw->size < sizeof(*ucode)) {
1737                 IWL_ERR(priv, "File size way too small!\n");
1738                 ret = -EINVAL;
1739                 goto err_release;
1740         }
1741
1742         /* Data from ucode file:  header followed by uCode images */
1743         ucode = (void *)ucode_raw->data;
1744
1745         priv->ucode_ver = le32_to_cpu(ucode->ver);
1746         api_ver = IWL_UCODE_API(priv->ucode_ver);
1747         inst_size = le32_to_cpu(ucode->inst_size);
1748         data_size = le32_to_cpu(ucode->data_size);
1749         init_size = le32_to_cpu(ucode->init_size);
1750         init_data_size = le32_to_cpu(ucode->init_data_size);
1751         boot_size = le32_to_cpu(ucode->boot_size);
1752
1753         /* api_ver should match the api version forming part of the
1754          * firmware filename ... but we don't check for that and only rely
1755          * on the API version read from firware header from here on forward */
1756
1757         if (api_ver < api_min || api_ver > api_max) {
1758                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1759                           "Driver supports v%u, firmware is v%u.\n",
1760                           api_max, api_ver);
1761                 priv->ucode_ver = 0;
1762                 ret = -EINVAL;
1763                 goto err_release;
1764         }
1765         if (api_ver != api_max)
1766                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1767                           "got v%u. New firmware can be obtained "
1768                           "from http://www.intellinuxwireless.org.\n",
1769                           api_max, api_ver);
1770
1771         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1772                IWL_UCODE_MAJOR(priv->ucode_ver),
1773                IWL_UCODE_MINOR(priv->ucode_ver),
1774                IWL_UCODE_API(priv->ucode_ver),
1775                IWL_UCODE_SERIAL(priv->ucode_ver));
1776
1777         IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
1778                        priv->ucode_ver);
1779         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
1780                        inst_size);
1781         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
1782                        data_size);
1783         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
1784                        init_size);
1785         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
1786                        init_data_size);
1787         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
1788                        boot_size);
1789
1790         /* Verify size of file vs. image size info in file's header */
1791         if (ucode_raw->size < sizeof(*ucode) +
1792                 inst_size + data_size + init_size +
1793                 init_data_size + boot_size) {
1794
1795                 IWL_DEBUG_INFO("uCode file size %d too small\n",
1796                                (int)ucode_raw->size);
1797                 ret = -EINVAL;
1798                 goto err_release;
1799         }
1800
1801         /* Verify that uCode images will fit in card's SRAM */
1802         if (inst_size > priv->hw_params.max_inst_size) {
1803                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
1804                                inst_size);
1805                 ret = -EINVAL;
1806                 goto err_release;
1807         }
1808
1809         if (data_size > priv->hw_params.max_data_size) {
1810                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
1811                                 data_size);
1812                 ret = -EINVAL;
1813                 goto err_release;
1814         }
1815         if (init_size > priv->hw_params.max_inst_size) {
1816                 IWL_DEBUG_INFO
1817                     ("uCode init instr len %d too large to fit in\n",
1818                       init_size);
1819                 ret = -EINVAL;
1820                 goto err_release;
1821         }
1822         if (init_data_size > priv->hw_params.max_data_size) {
1823                 IWL_DEBUG_INFO
1824                     ("uCode init data len %d too large to fit in\n",
1825                       init_data_size);
1826                 ret = -EINVAL;
1827                 goto err_release;
1828         }
1829         if (boot_size > priv->hw_params.max_bsm_size) {
1830                 IWL_DEBUG_INFO
1831                     ("uCode boot instr len %d too large to fit in\n",
1832                       boot_size);
1833                 ret = -EINVAL;
1834                 goto err_release;
1835         }
1836
1837         /* Allocate ucode buffers for card's bus-master loading ... */
1838
1839         /* Runtime instructions and 2 copies of data:
1840          * 1) unmodified from disk
1841          * 2) backup cache for save/restore during power-downs */
1842         priv->ucode_code.len = inst_size;
1843         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1844
1845         priv->ucode_data.len = data_size;
1846         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1847
1848         priv->ucode_data_backup.len = data_size;
1849         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1850
1851         /* Initialization instructions and data */
1852         if (init_size && init_data_size) {
1853                 priv->ucode_init.len = init_size;
1854                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1855
1856                 priv->ucode_init_data.len = init_data_size;
1857                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1858
1859                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1860                         goto err_pci_alloc;
1861         }
1862
1863         /* Bootstrap (instructions only, no data) */
1864         if (boot_size) {
1865                 priv->ucode_boot.len = boot_size;
1866                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1867
1868                 if (!priv->ucode_boot.v_addr)
1869                         goto err_pci_alloc;
1870         }
1871
1872         /* Copy images into buffers for card's bus-master reads ... */
1873
1874         /* Runtime instructions (first block of data in file) */
1875         src = &ucode->data[0];
1876         len = priv->ucode_code.len;
1877         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
1878         memcpy(priv->ucode_code.v_addr, src, len);
1879         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1880                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1881
1882         /* Runtime data (2nd block)
1883          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1884         src = &ucode->data[inst_size];
1885         len = priv->ucode_data.len;
1886         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
1887         memcpy(priv->ucode_data.v_addr, src, len);
1888         memcpy(priv->ucode_data_backup.v_addr, src, len);
1889
1890         /* Initialization instructions (3rd block) */
1891         if (init_size) {
1892                 src = &ucode->data[inst_size + data_size];
1893                 len = priv->ucode_init.len;
1894                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
1895                                 len);
1896                 memcpy(priv->ucode_init.v_addr, src, len);
1897         }
1898
1899         /* Initialization data (4th block) */
1900         if (init_data_size) {
1901                 src = &ucode->data[inst_size + data_size + init_size];
1902                 len = priv->ucode_init_data.len;
1903                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
1904                                len);
1905                 memcpy(priv->ucode_init_data.v_addr, src, len);
1906         }
1907
1908         /* Bootstrap instructions (5th block) */
1909         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1910         len = priv->ucode_boot.len;
1911         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
1912         memcpy(priv->ucode_boot.v_addr, src, len);
1913
1914         /* We have our copies now, allow OS release its copies */
1915         release_firmware(ucode_raw);
1916         return 0;
1917
1918  err_pci_alloc:
1919         IWL_ERR(priv, "failed to allocate pci memory\n");
1920         ret = -ENOMEM;
1921         iwl_dealloc_ucode_pci(priv);
1922
1923  err_release:
1924         release_firmware(ucode_raw);
1925
1926  error:
1927         return ret;
1928 }
1929
1930 /* temporary */
1931 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1932                                  struct sk_buff *skb);
1933
1934 /**
1935  * iwl_alive_start - called after REPLY_ALIVE notification received
1936  *                   from protocol/runtime uCode (initialization uCode's
1937  *                   Alive gets handled by iwl_init_alive_start()).
1938  */
1939 static void iwl_alive_start(struct iwl_priv *priv)
1940 {
1941         int ret = 0;
1942
1943         IWL_DEBUG_INFO("Runtime Alive received.\n");
1944
1945         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1946                 /* We had an error bringing up the hardware, so take it
1947                  * all the way back down so we can try again */
1948                 IWL_DEBUG_INFO("Alive failed.\n");
1949                 goto restart;
1950         }
1951
1952         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1953          * This is a paranoid check, because we would not have gotten the
1954          * "runtime" alive if code weren't properly loaded.  */
1955         if (iwl_verify_ucode(priv)) {
1956                 /* Runtime instruction load was bad;
1957                  * take it all the way back down so we can try again */
1958                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
1959                 goto restart;
1960         }
1961
1962         iwl_clear_stations_table(priv);
1963         ret = priv->cfg->ops->lib->alive_notify(priv);
1964         if (ret) {
1965                 IWL_WARN(priv,
1966                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1967                 goto restart;
1968         }
1969
1970         /* After the ALIVE response, we can send host commands to the uCode */
1971         set_bit(STATUS_ALIVE, &priv->status);
1972
1973         if (iwl_is_rfkill(priv))
1974                 return;
1975
1976         ieee80211_wake_queues(priv->hw);
1977
1978         priv->active_rate = priv->rates_mask;
1979         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1980
1981         if (iwl_is_associated(priv)) {
1982                 struct iwl_rxon_cmd *active_rxon =
1983                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1984
1985                 memcpy(&priv->staging_rxon, &priv->active_rxon,
1986                        sizeof(priv->staging_rxon));
1987                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1988         } else {
1989                 /* Initialize our rx_config data */
1990                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1991                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1992         }
1993
1994         /* Configure Bluetooth device coexistence support */
1995         iwl_send_bt_config(priv);
1996
1997         iwl_reset_run_time_calib(priv);
1998
1999         /* Configure the adapter for unassociated operation */
2000         iwl_commit_rxon(priv);
2001
2002         /* At this point, the NIC is initialized and operational */
2003         iwl_rf_kill_ct_config(priv);
2004
2005         iwl_leds_register(priv);
2006
2007         IWL_DEBUG_INFO("ALIVE processing complete.\n");
2008         set_bit(STATUS_READY, &priv->status);
2009         wake_up_interruptible(&priv->wait_command_queue);
2010
2011         if (priv->error_recovering)
2012                 iwl_error_recovery(priv);
2013
2014         iwl_power_update_mode(priv, 1);
2015
2016         /* reassociate for ADHOC mode */
2017         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2018                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2019                                                                 priv->vif);
2020                 if (beacon)
2021                         iwl_mac_beacon_update(priv->hw, beacon);
2022         }
2023
2024
2025         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2026                 iwl_set_mode(priv, priv->iw_mode);
2027
2028         return;
2029
2030  restart:
2031         queue_work(priv->workqueue, &priv->restart);
2032 }
2033
2034 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2035
2036 static void __iwl_down(struct iwl_priv *priv)
2037 {
2038         unsigned long flags;
2039         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2040
2041         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
2042
2043         if (!exit_pending)
2044                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2045
2046         iwl_leds_unregister(priv);
2047
2048         iwl_clear_stations_table(priv);
2049
2050         /* Unblock any waiting calls */
2051         wake_up_interruptible_all(&priv->wait_command_queue);
2052
2053         /* Wipe out the EXIT_PENDING status bit if we are not actually
2054          * exiting the module */
2055         if (!exit_pending)
2056                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2057
2058         /* stop and reset the on-board processor */
2059         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2060
2061         /* tell the device to stop sending interrupts */
2062         spin_lock_irqsave(&priv->lock, flags);
2063         iwl_disable_interrupts(priv);
2064         spin_unlock_irqrestore(&priv->lock, flags);
2065         iwl_synchronize_irq(priv);
2066
2067         if (priv->mac80211_registered)
2068                 ieee80211_stop_queues(priv->hw);
2069
2070         /* If we have not previously called iwl_init() then
2071          * clear all bits but the RF Kill and SUSPEND bits and return */
2072         if (!iwl_is_init(priv)) {
2073                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2074                                         STATUS_RF_KILL_HW |
2075                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2076                                         STATUS_RF_KILL_SW |
2077                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2078                                         STATUS_GEO_CONFIGURED |
2079                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
2080                                         STATUS_IN_SUSPEND |
2081                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2082                                         STATUS_EXIT_PENDING;
2083                 goto exit;
2084         }
2085
2086         /* ...otherwise clear out all the status bits but the RF Kill and
2087          * SUSPEND bits and continue taking the NIC down. */
2088         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2089                                 STATUS_RF_KILL_HW |
2090                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2091                                 STATUS_RF_KILL_SW |
2092                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2093                                 STATUS_GEO_CONFIGURED |
2094                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
2095                                 STATUS_IN_SUSPEND |
2096                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2097                                 STATUS_FW_ERROR |
2098                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2099                                 STATUS_EXIT_PENDING;
2100
2101         spin_lock_irqsave(&priv->lock, flags);
2102         iwl_clear_bit(priv, CSR_GP_CNTRL,
2103                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2104         spin_unlock_irqrestore(&priv->lock, flags);
2105
2106         iwl_txq_ctx_stop(priv);
2107         iwl_rxq_stop(priv);
2108
2109         spin_lock_irqsave(&priv->lock, flags);
2110         if (!iwl_grab_nic_access(priv)) {
2111                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2112                                          APMG_CLK_VAL_DMA_CLK_RQT);
2113                 iwl_release_nic_access(priv);
2114         }
2115         spin_unlock_irqrestore(&priv->lock, flags);
2116
2117         udelay(5);
2118
2119         /* FIXME: apm_ops.suspend(priv) */
2120         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
2121                 priv->cfg->ops->lib->apm_ops.stop(priv);
2122         else
2123                 priv->cfg->ops->lib->apm_ops.reset(priv);
2124  exit:
2125         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2126
2127         if (priv->ibss_beacon)
2128                 dev_kfree_skb(priv->ibss_beacon);
2129         priv->ibss_beacon = NULL;
2130
2131         /* clear out any free frames */
2132         iwl_clear_free_frames(priv);
2133 }
2134
2135 static void iwl_down(struct iwl_priv *priv)
2136 {
2137         mutex_lock(&priv->mutex);
2138         __iwl_down(priv);
2139         mutex_unlock(&priv->mutex);
2140
2141         iwl_cancel_deferred_work(priv);
2142 }
2143
2144 #define MAX_HW_RESTARTS 5
2145
2146 static int __iwl_up(struct iwl_priv *priv)
2147 {
2148         int i;
2149         int ret;
2150
2151         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2152                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2153                 return -EIO;
2154         }
2155
2156         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2157                 IWL_ERR(priv, "ucode not available for device bringup\n");
2158                 return -EIO;
2159         }
2160
2161         /* If platform's RF_KILL switch is NOT set to KILL */
2162         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2163                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2164         else
2165                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2166
2167         if (iwl_is_rfkill(priv)) {
2168                 iwl_enable_interrupts(priv);
2169                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
2170                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
2171                 return 0;
2172         }
2173
2174         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2175
2176         ret = iwl_hw_nic_init(priv);
2177         if (ret) {
2178                 IWL_ERR(priv, "Unable to init nic\n");
2179                 return ret;
2180         }
2181
2182         /* make sure rfkill handshake bits are cleared */
2183         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2184         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2185                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2186
2187         /* clear (again), then enable host interrupts */
2188         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2189         iwl_enable_interrupts(priv);
2190
2191         /* really make sure rfkill handshake bits are cleared */
2192         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2193         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2194
2195         /* Copy original ucode data image from disk into backup cache.
2196          * This will be used to initialize the on-board processor's
2197          * data SRAM for a clean start when the runtime program first loads. */
2198         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2199                priv->ucode_data.len);
2200
2201         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2202
2203                 iwl_clear_stations_table(priv);
2204
2205                 /* load bootstrap state machine,
2206                  * load bootstrap program into processor's memory,
2207                  * prepare to load the "initialize" uCode */
2208                 ret = priv->cfg->ops->lib->load_ucode(priv);
2209
2210                 if (ret) {
2211                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2212                                 ret);
2213                         continue;
2214                 }
2215
2216                 /* Clear out the uCode error bit if it is set */
2217                 clear_bit(STATUS_FW_ERROR, &priv->status);
2218
2219                 /* start card; "initialize" will load runtime ucode */
2220                 iwl_nic_start(priv);
2221
2222                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
2223
2224                 return 0;
2225         }
2226
2227         set_bit(STATUS_EXIT_PENDING, &priv->status);
2228         __iwl_down(priv);
2229         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2230
2231         /* tried to restart and config the device for as long as our
2232          * patience could withstand */
2233         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2234         return -EIO;
2235 }
2236
2237
2238 /*****************************************************************************
2239  *
2240  * Workqueue callbacks
2241  *
2242  *****************************************************************************/
2243
2244 static void iwl_bg_init_alive_start(struct work_struct *data)
2245 {
2246         struct iwl_priv *priv =
2247             container_of(data, struct iwl_priv, init_alive_start.work);
2248
2249         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2250                 return;
2251
2252         mutex_lock(&priv->mutex);
2253         priv->cfg->ops->lib->init_alive_start(priv);
2254         mutex_unlock(&priv->mutex);
2255 }
2256
2257 static void iwl_bg_alive_start(struct work_struct *data)
2258 {
2259         struct iwl_priv *priv =
2260             container_of(data, struct iwl_priv, alive_start.work);
2261
2262         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2263                 return;
2264
2265         mutex_lock(&priv->mutex);
2266         iwl_alive_start(priv);
2267         mutex_unlock(&priv->mutex);
2268 }
2269
2270 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2271 {
2272         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2273                         run_time_calib_work);
2274
2275         mutex_lock(&priv->mutex);
2276
2277         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2278             test_bit(STATUS_SCANNING, &priv->status)) {
2279                 mutex_unlock(&priv->mutex);
2280                 return;
2281         }
2282
2283         if (priv->start_calib) {
2284                 iwl_chain_noise_calibration(priv, &priv->statistics);
2285
2286                 iwl_sensitivity_calibration(priv, &priv->statistics);
2287         }
2288
2289         mutex_unlock(&priv->mutex);
2290         return;
2291 }
2292
2293 static void iwl_bg_up(struct work_struct *data)
2294 {
2295         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2296
2297         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2298                 return;
2299
2300         mutex_lock(&priv->mutex);
2301         __iwl_up(priv);
2302         mutex_unlock(&priv->mutex);
2303         iwl_rfkill_set_hw_state(priv);
2304 }
2305
2306 static void iwl_bg_restart(struct work_struct *data)
2307 {
2308         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2309
2310         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2311                 return;
2312
2313         iwl_down(priv);
2314         queue_work(priv->workqueue, &priv->up);
2315 }
2316
2317 static void iwl_bg_rx_replenish(struct work_struct *data)
2318 {
2319         struct iwl_priv *priv =
2320             container_of(data, struct iwl_priv, rx_replenish);
2321
2322         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2323                 return;
2324
2325         mutex_lock(&priv->mutex);
2326         iwl_rx_replenish(priv);
2327         mutex_unlock(&priv->mutex);
2328 }
2329
2330 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2331
2332 static void iwl_post_associate(struct iwl_priv *priv)
2333 {
2334         struct ieee80211_conf *conf = NULL;
2335         int ret = 0;
2336         unsigned long flags;
2337
2338         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2339                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2340                 return;
2341         }
2342
2343         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
2344                         priv->assoc_id, priv->active_rxon.bssid_addr);
2345
2346
2347         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2348                 return;
2349
2350
2351         if (!priv->vif || !priv->is_open)
2352                 return;
2353
2354         iwl_power_cancel_timeout(priv);
2355         iwl_scan_cancel_timeout(priv, 200);
2356
2357         conf = ieee80211_get_hw_conf(priv->hw);
2358
2359         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2360         iwl_commit_rxon(priv);
2361
2362         iwl_setup_rxon_timing(priv);
2363         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2364                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2365         if (ret)
2366                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2367                             "Attempting to continue.\n");
2368
2369         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2370
2371         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2372
2373         iwl_set_rxon_chain(priv);
2374         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2375
2376         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
2377                         priv->assoc_id, priv->beacon_int);
2378
2379         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2380                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2381         else
2382                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2383
2384         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2385                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2386                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2387                 else
2388                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2389
2390                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2391                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2392
2393         }
2394
2395         iwl_commit_rxon(priv);
2396
2397         switch (priv->iw_mode) {
2398         case NL80211_IFTYPE_STATION:
2399                 break;
2400
2401         case NL80211_IFTYPE_ADHOC:
2402
2403                 /* assume default assoc id */
2404                 priv->assoc_id = 1;
2405
2406                 iwl_rxon_add_station(priv, priv->bssid, 0);
2407                 iwl_send_beacon_cmd(priv);
2408
2409                 break;
2410
2411         default:
2412                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2413                           __func__, priv->iw_mode);
2414                 break;
2415         }
2416
2417         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2418                 priv->assoc_station_added = 1;
2419
2420         spin_lock_irqsave(&priv->lock, flags);
2421         iwl_activate_qos(priv, 0);
2422         spin_unlock_irqrestore(&priv->lock, flags);
2423
2424         /* the chain noise calibration will enabled PM upon completion
2425          * If chain noise has already been run, then we need to enable
2426          * power management here */
2427         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2428                 iwl_power_enable_management(priv);
2429
2430         /* Enable Rx differential gain and sensitivity calibrations */
2431         iwl_chain_noise_reset(priv);
2432         priv->start_calib = 1;
2433
2434 }
2435
2436 /*****************************************************************************
2437  *
2438  * mac80211 entry point functions
2439  *
2440  *****************************************************************************/
2441
2442 #define UCODE_READY_TIMEOUT     (4 * HZ)
2443
2444 static int iwl_mac_start(struct ieee80211_hw *hw)
2445 {
2446         struct iwl_priv *priv = hw->priv;
2447         int ret;
2448
2449         IWL_DEBUG_MAC80211("enter\n");
2450
2451         /* we should be verifying the device is ready to be opened */
2452         mutex_lock(&priv->mutex);
2453
2454         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2455         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2456          * ucode filename and max sizes are card-specific. */
2457
2458         if (!priv->ucode_code.len) {
2459                 ret = iwl_read_ucode(priv);
2460                 if (ret) {
2461                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2462                         mutex_unlock(&priv->mutex);
2463                         return ret;
2464                 }
2465         }
2466
2467         ret = __iwl_up(priv);
2468
2469         mutex_unlock(&priv->mutex);
2470
2471         iwl_rfkill_set_hw_state(priv);
2472
2473         if (ret)
2474                 return ret;
2475
2476         if (iwl_is_rfkill(priv))
2477                 goto out;
2478
2479         IWL_DEBUG_INFO("Start UP work done.\n");
2480
2481         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2482                 return 0;
2483
2484         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2485          * mac80211 will not be run successfully. */
2486         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2487                         test_bit(STATUS_READY, &priv->status),
2488                         UCODE_READY_TIMEOUT);
2489         if (!ret) {
2490                 if (!test_bit(STATUS_READY, &priv->status)) {
2491                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2492                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2493                         return -ETIMEDOUT;
2494                 }
2495         }
2496
2497 out:
2498         priv->is_open = 1;
2499         IWL_DEBUG_MAC80211("leave\n");
2500         return 0;
2501 }
2502
2503 static void iwl_mac_stop(struct ieee80211_hw *hw)
2504 {
2505         struct iwl_priv *priv = hw->priv;
2506
2507         IWL_DEBUG_MAC80211("enter\n");
2508
2509         if (!priv->is_open) {
2510                 IWL_DEBUG_MAC80211("leave - skip\n");
2511                 return;
2512         }
2513
2514         priv->is_open = 0;
2515
2516         if (iwl_is_ready_rf(priv)) {
2517                 /* stop mac, cancel any scan request and clear
2518                  * RXON_FILTER_ASSOC_MSK BIT
2519                  */
2520                 mutex_lock(&priv->mutex);
2521                 iwl_scan_cancel_timeout(priv, 100);
2522                 mutex_unlock(&priv->mutex);
2523         }
2524
2525         iwl_down(priv);
2526
2527         flush_workqueue(priv->workqueue);
2528
2529         /* enable interrupts again in order to receive rfkill changes */
2530         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2531         iwl_enable_interrupts(priv);
2532
2533         IWL_DEBUG_MAC80211("leave\n");
2534 }
2535
2536 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2537 {
2538         struct iwl_priv *priv = hw->priv;
2539
2540         IWL_DEBUG_MACDUMP("enter\n");
2541
2542         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2543                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2544
2545         if (iwl_tx_skb(priv, skb))
2546                 dev_kfree_skb_any(skb);
2547
2548         IWL_DEBUG_MACDUMP("leave\n");
2549         return NETDEV_TX_OK;
2550 }
2551
2552 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2553                                  struct ieee80211_if_init_conf *conf)
2554 {
2555         struct iwl_priv *priv = hw->priv;
2556         unsigned long flags;
2557
2558         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
2559
2560         if (priv->vif) {
2561                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
2562                 return -EOPNOTSUPP;
2563         }
2564
2565         spin_lock_irqsave(&priv->lock, flags);
2566         priv->vif = conf->vif;
2567         priv->iw_mode = conf->type;
2568
2569         spin_unlock_irqrestore(&priv->lock, flags);
2570
2571         mutex_lock(&priv->mutex);
2572
2573         if (conf->mac_addr) {
2574                 IWL_DEBUG_MAC80211("Set %pM\n", conf->mac_addr);
2575                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2576         }
2577
2578         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2579                 /* we are not ready, will run again when ready */
2580                 set_bit(STATUS_MODE_PENDING, &priv->status);
2581
2582         mutex_unlock(&priv->mutex);
2583
2584         IWL_DEBUG_MAC80211("leave\n");
2585         return 0;
2586 }
2587
2588 /**
2589  * iwl_mac_config - mac80211 config callback
2590  *
2591  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2592  * be set inappropriately and the driver currently sets the hardware up to
2593  * use it whenever needed.
2594  */
2595 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2596 {
2597         struct iwl_priv *priv = hw->priv;
2598         const struct iwl_channel_info *ch_info;
2599         struct ieee80211_conf *conf = &hw->conf;
2600         unsigned long flags;
2601         int ret = 0;
2602         u16 channel;
2603
2604         mutex_lock(&priv->mutex);
2605         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
2606
2607         priv->current_ht_config.is_ht = conf_is_ht(conf);
2608
2609         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2610                 IWL_DEBUG_MAC80211("leave - RF-KILL - waiting for uCode\n");
2611                 goto out;
2612         }
2613
2614         if (!conf->radio_enabled)
2615                 iwl_radio_kill_sw_disable_radio(priv);
2616
2617         if (!iwl_is_ready(priv)) {
2618                 IWL_DEBUG_MAC80211("leave - not ready\n");
2619                 ret = -EIO;
2620                 goto out;
2621         }
2622
2623         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2624                      test_bit(STATUS_SCANNING, &priv->status))) {
2625                 IWL_DEBUG_MAC80211("leave - scanning\n");
2626                 mutex_unlock(&priv->mutex);
2627                 return 0;
2628         }
2629
2630         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2631         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2632         if (!is_channel_valid(ch_info)) {
2633                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
2634                 ret = -EINVAL;
2635                 goto out;
2636         }
2637
2638         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2639             !is_channel_ibss(ch_info)) {
2640                 IWL_ERR(priv, "channel %d in band %d not IBSS channel\n",
2641                         conf->channel->hw_value, conf->channel->band);
2642                 ret = -EINVAL;
2643                 goto out;
2644         }
2645
2646         spin_lock_irqsave(&priv->lock, flags);
2647
2648
2649         /* if we are switching from ht to 2.4 clear flags
2650          * from any ht related info since 2.4 does not
2651          * support ht */
2652         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2653 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2654             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2655 #endif
2656         )
2657                 priv->staging_rxon.flags = 0;
2658
2659         iwl_set_rxon_channel(priv, conf->channel);
2660
2661         iwl_set_flags_for_band(priv, conf->channel->band);
2662
2663         /* The list of supported rates and rate mask can be different
2664          * for each band; since the band may have changed, reset
2665          * the rate mask to what mac80211 lists */
2666         iwl_set_rate(priv);
2667
2668         spin_unlock_irqrestore(&priv->lock, flags);
2669
2670 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2671         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2672                 iwl_hw_channel_switch(priv, conf->channel);
2673                 goto out;
2674         }
2675 #endif
2676
2677         if (!conf->radio_enabled) {
2678                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
2679                 goto out;
2680         }
2681
2682         if (iwl_is_rfkill(priv)) {
2683                 IWL_DEBUG_MAC80211("leave - RF kill\n");
2684                 ret = -EIO;
2685                 goto out;
2686         }
2687
2688         if (conf->flags & IEEE80211_CONF_PS)
2689                 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2690         else
2691                 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2692         if (ret)
2693                 IWL_DEBUG_MAC80211("Error setting power level\n");
2694
2695         IWL_DEBUG_MAC80211("TX Power old=%d new=%d\n",
2696                            priv->tx_power_user_lmt, conf->power_level);
2697
2698         iwl_set_tx_power(priv, conf->power_level, false);
2699
2700         iwl_set_rate(priv);
2701
2702         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2703         iwl_set_rxon_chain(priv);
2704
2705         if (memcmp(&priv->active_rxon,
2706                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2707                 iwl_commit_rxon(priv);
2708         else
2709                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
2710
2711         IWL_DEBUG_MAC80211("leave\n");
2712
2713 out:
2714         mutex_unlock(&priv->mutex);
2715         return ret;
2716 }
2717
2718 static void iwl_config_ap(struct iwl_priv *priv)
2719 {
2720         int ret = 0;
2721         unsigned long flags;
2722
2723         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2724                 return;
2725
2726         /* The following should be done only at AP bring up */
2727         if (!iwl_is_associated(priv)) {
2728
2729                 /* RXON - unassoc (to set timing command) */
2730                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2731                 iwl_commit_rxon(priv);
2732
2733                 /* RXON Timing */
2734                 iwl_setup_rxon_timing(priv);
2735                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2736                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2737                 if (ret)
2738                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2739                                         "Attempting to continue.\n");
2740
2741                 iwl_set_rxon_chain(priv);
2742
2743                 /* FIXME: what should be the assoc_id for AP? */
2744                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2745                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2746                         priv->staging_rxon.flags |=
2747                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2748                 else
2749                         priv->staging_rxon.flags &=
2750                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2751
2752                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2753                         if (priv->assoc_capability &
2754                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2755                                 priv->staging_rxon.flags |=
2756                                         RXON_FLG_SHORT_SLOT_MSK;
2757                         else
2758                                 priv->staging_rxon.flags &=
2759                                         ~RXON_FLG_SHORT_SLOT_MSK;
2760
2761                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2762                                 priv->staging_rxon.flags &=
2763                                         ~RXON_FLG_SHORT_SLOT_MSK;
2764                 }
2765                 /* restore RXON assoc */
2766                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2767                 iwl_commit_rxon(priv);
2768                 spin_lock_irqsave(&priv->lock, flags);
2769                 iwl_activate_qos(priv, 1);
2770                 spin_unlock_irqrestore(&priv->lock, flags);
2771                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2772         }
2773         iwl_send_beacon_cmd(priv);
2774
2775         /* FIXME - we need to add code here to detect a totally new
2776          * configuration, reset the AP, unassoc, rxon timing, assoc,
2777          * clear sta table, add BCAST sta... */
2778 }
2779
2780
2781 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2782                                         struct ieee80211_vif *vif,
2783                                     struct ieee80211_if_conf *conf)
2784 {
2785         struct iwl_priv *priv = hw->priv;
2786         int rc;
2787
2788         if (conf == NULL)
2789                 return -EIO;
2790
2791         if (priv->vif != vif) {
2792                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
2793                 return 0;
2794         }
2795
2796         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2797             conf->changed & IEEE80211_IFCC_BEACON) {
2798                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2799                 if (!beacon)
2800                         return -ENOMEM;
2801                 mutex_lock(&priv->mutex);
2802                 rc = iwl_mac_beacon_update(hw, beacon);
2803                 mutex_unlock(&priv->mutex);
2804                 if (rc)
2805                         return rc;
2806         }
2807
2808         if (!iwl_is_alive(priv))
2809                 return -EAGAIN;
2810
2811         mutex_lock(&priv->mutex);
2812
2813         if (conf->bssid)
2814                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
2815
2816 /*
2817  * very dubious code was here; the probe filtering flag is never set:
2818  *
2819         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2820             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2821  */
2822
2823         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2824                 if (!conf->bssid) {
2825                         conf->bssid = priv->mac_addr;
2826                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2827                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
2828                                            conf->bssid);
2829                 }
2830                 if (priv->ibss_beacon)
2831                         dev_kfree_skb(priv->ibss_beacon);
2832
2833                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2834         }
2835
2836         if (iwl_is_rfkill(priv))
2837                 goto done;
2838
2839         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2840             !is_multicast_ether_addr(conf->bssid)) {
2841                 /* If there is currently a HW scan going on in the background
2842                  * then we need to cancel it else the RXON below will fail. */
2843                 if (iwl_scan_cancel_timeout(priv, 100)) {
2844                         IWL_WARN(priv, "Aborted scan still in progress "
2845                                     "after 100ms\n");
2846                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2847                         mutex_unlock(&priv->mutex);
2848                         return -EAGAIN;
2849                 }
2850                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2851
2852                 /* TODO: Audit driver for usage of these members and see
2853                  * if mac80211 deprecates them (priv->bssid looks like it
2854                  * shouldn't be there, but I haven't scanned the IBSS code
2855                  * to verify) - jpk */
2856                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2857
2858                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2859                         iwl_config_ap(priv);
2860                 else {
2861                         rc = iwl_commit_rxon(priv);
2862                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2863                                 iwl_rxon_add_station(
2864                                         priv, priv->active_rxon.bssid_addr, 1);
2865                 }
2866
2867         } else {
2868                 iwl_scan_cancel_timeout(priv, 100);
2869                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2870                 iwl_commit_rxon(priv);
2871         }
2872
2873  done:
2874         IWL_DEBUG_MAC80211("leave\n");
2875         mutex_unlock(&priv->mutex);
2876
2877         return 0;
2878 }
2879
2880 static void iwl_configure_filter(struct ieee80211_hw *hw,
2881                                  unsigned int changed_flags,
2882                                  unsigned int *total_flags,
2883                                  int mc_count, struct dev_addr_list *mc_list)
2884 {
2885         struct iwl_priv *priv = hw->priv;
2886         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
2887
2888         IWL_DEBUG_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
2889                         changed_flags, *total_flags);
2890
2891         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
2892                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
2893                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
2894                 else
2895                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
2896         }
2897         if (changed_flags & FIF_ALLMULTI) {
2898                 if (*total_flags & FIF_ALLMULTI)
2899                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
2900                 else
2901                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
2902         }
2903         if (changed_flags & FIF_CONTROL) {
2904                 if (*total_flags & FIF_CONTROL)
2905                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
2906                 else
2907                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
2908         }
2909         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
2910                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
2911                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
2912                 else
2913                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
2914         }
2915
2916         /* We avoid iwl_commit_rxon here to commit the new filter flags
2917          * since mac80211 will call ieee80211_hw_config immediately.
2918          * (mc_list is not supported at this time). Otherwise, we need to
2919          * queue a background iwl_commit_rxon work.
2920          */
2921
2922         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
2923                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
2924 }
2925
2926 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2927                                      struct ieee80211_if_init_conf *conf)
2928 {
2929         struct iwl_priv *priv = hw->priv;
2930
2931         IWL_DEBUG_MAC80211("enter\n");
2932
2933         mutex_lock(&priv->mutex);
2934
2935         if (iwl_is_ready_rf(priv)) {
2936                 iwl_scan_cancel_timeout(priv, 100);
2937                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2938                 iwl_commit_rxon(priv);
2939         }
2940         if (priv->vif == conf->vif) {
2941                 priv->vif = NULL;
2942                 memset(priv->bssid, 0, ETH_ALEN);
2943         }
2944         mutex_unlock(&priv->mutex);
2945
2946         IWL_DEBUG_MAC80211("leave\n");
2947
2948 }
2949
2950 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2951 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2952                                      struct ieee80211_vif *vif,
2953                                      struct ieee80211_bss_conf *bss_conf,
2954                                      u32 changes)
2955 {
2956         struct iwl_priv *priv = hw->priv;
2957
2958         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
2959
2960         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2961                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
2962                                    bss_conf->use_short_preamble);
2963                 if (bss_conf->use_short_preamble)
2964                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2965                 else
2966                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2967         }
2968
2969         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2970                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
2971                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2972                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2973                 else
2974                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2975         }
2976
2977         if (changes & BSS_CHANGED_HT) {
2978                 iwl_ht_conf(priv, bss_conf);
2979                 iwl_set_rxon_chain(priv);
2980         }
2981
2982         if (changes & BSS_CHANGED_ASSOC) {
2983                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
2984                 /* This should never happen as this function should
2985                  * never be called from interrupt context. */
2986                 if (WARN_ON_ONCE(in_interrupt()))
2987                         return;
2988                 if (bss_conf->assoc) {
2989                         priv->assoc_id = bss_conf->aid;
2990                         priv->beacon_int = bss_conf->beacon_int;
2991                         priv->power_data.dtim_period = bss_conf->dtim_period;
2992                         priv->timestamp = bss_conf->timestamp;
2993                         priv->assoc_capability = bss_conf->assoc_capability;
2994
2995                         /* we have just associated, don't start scan too early
2996                          * leave time for EAPOL exchange to complete
2997                          */
2998                         priv->next_scan_jiffies = jiffies +
2999                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3000                         mutex_lock(&priv->mutex);
3001                         iwl_post_associate(priv);
3002                         mutex_unlock(&priv->mutex);
3003                 } else {
3004                         priv->assoc_id = 0;
3005                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
3006                 }
3007         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
3008                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
3009                         iwl_send_rxon_assoc(priv);
3010         }
3011
3012 }
3013
3014 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
3015 {
3016         unsigned long flags;
3017         struct iwl_priv *priv = hw->priv;
3018         int ret;
3019
3020         IWL_DEBUG_MAC80211("enter\n");
3021
3022         mutex_lock(&priv->mutex);
3023         spin_lock_irqsave(&priv->lock, flags);
3024
3025         if (!iwl_is_ready_rf(priv)) {
3026                 ret = -EIO;
3027                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
3028                 goto out_unlock;
3029         }
3030
3031         /* We don't schedule scan within next_scan_jiffies period.
3032          * Avoid scanning during possible EAPOL exchange, return
3033          * success immediately.
3034          */
3035         if (priv->next_scan_jiffies &&
3036             time_after(priv->next_scan_jiffies, jiffies)) {
3037                 IWL_DEBUG_SCAN("scan rejected: within next scan period\n");
3038                 queue_work(priv->workqueue, &priv->scan_completed);
3039                 ret = 0;
3040                 goto out_unlock;
3041         }
3042
3043         /* if we just finished scan ask for delay */
3044         if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
3045             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
3046                 IWL_DEBUG_SCAN("scan rejected: within previous scan period\n");
3047                 queue_work(priv->workqueue, &priv->scan_completed);
3048                 ret = 0;
3049                 goto out_unlock;
3050         }
3051
3052         if (ssid_len) {
3053                 priv->one_direct_scan = 1;
3054                 priv->direct_ssid_len =  min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);
3055                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
3056         } else {
3057                 priv->one_direct_scan = 0;
3058         }
3059
3060         ret = iwl_scan_initiate(priv);
3061
3062         IWL_DEBUG_MAC80211("leave\n");
3063
3064 out_unlock:
3065         spin_unlock_irqrestore(&priv->lock, flags);
3066         mutex_unlock(&priv->mutex);
3067
3068         return ret;
3069 }
3070
3071 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
3072                         struct ieee80211_key_conf *keyconf, const u8 *addr,
3073                         u32 iv32, u16 *phase1key)
3074 {
3075
3076         struct iwl_priv *priv = hw->priv;
3077         IWL_DEBUG_MAC80211("enter\n");
3078
3079         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
3080
3081         IWL_DEBUG_MAC80211("leave\n");
3082 }
3083
3084 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3085                            struct ieee80211_vif *vif,
3086                            struct ieee80211_sta *sta,
3087                            struct ieee80211_key_conf *key)
3088 {
3089         struct iwl_priv *priv = hw->priv;
3090         const u8 *addr;
3091         int ret;
3092         u8 sta_id;
3093         bool is_default_wep_key = false;
3094
3095         IWL_DEBUG_MAC80211("enter\n");
3096
3097         if (priv->hw_params.sw_crypto) {
3098                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
3099                 return -EOPNOTSUPP;
3100         }
3101         addr = sta ? sta->addr : iwl_bcast_addr;
3102         sta_id = iwl_find_station(priv, addr);
3103         if (sta_id == IWL_INVALID_STATION) {
3104                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
3105                                    addr);
3106                 return -EINVAL;
3107
3108         }
3109
3110         mutex_lock(&priv->mutex);
3111         iwl_scan_cancel_timeout(priv, 100);
3112         mutex_unlock(&priv->mutex);
3113
3114         /* If we are getting WEP group key and we didn't receive any key mapping
3115          * so far, we are in legacy wep mode (group key only), otherwise we are
3116          * in 1X mode.
3117          * In legacy wep mode, we use another host command to the uCode */
3118         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
3119                 priv->iw_mode != NL80211_IFTYPE_AP) {
3120                 if (cmd == SET_KEY)
3121                         is_default_wep_key = !priv->key_mapping_key;
3122                 else
3123                         is_default_wep_key =
3124                                         (key->hw_key_idx == HW_KEY_DEFAULT);
3125         }
3126
3127         switch (cmd) {
3128         case SET_KEY:
3129                 if (is_default_wep_key)
3130                         ret = iwl_set_default_wep_key(priv, key);
3131                 else
3132                         ret = iwl_set_dynamic_key(priv, key, sta_id);
3133
3134                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
3135                 break;
3136         case DISABLE_KEY:
3137                 if (is_default_wep_key)
3138                         ret = iwl_remove_default_wep_key(priv, key);
3139                 else
3140                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
3141
3142                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
3143                 break;
3144         default:
3145                 ret = -EINVAL;
3146         }
3147
3148         IWL_DEBUG_MAC80211("leave\n");
3149
3150         return ret;
3151 }
3152
3153 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
3154                            const struct ieee80211_tx_queue_params *params)
3155 {
3156         struct iwl_priv *priv = hw->priv;
3157         unsigned long flags;
3158         int q;
3159
3160         IWL_DEBUG_MAC80211("enter\n");
3161
3162         if (!iwl_is_ready_rf(priv)) {
3163                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3164                 return -EIO;
3165         }
3166
3167         if (queue >= AC_NUM) {
3168                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
3169                 return 0;
3170         }
3171
3172         q = AC_NUM - 1 - queue;
3173
3174         spin_lock_irqsave(&priv->lock, flags);
3175
3176         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
3177         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
3178         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
3179         priv->qos_data.def_qos_parm.ac[q].edca_txop =
3180                         cpu_to_le16((params->txop * 32));
3181
3182         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
3183         priv->qos_data.qos_active = 1;
3184
3185         if (priv->iw_mode == NL80211_IFTYPE_AP)
3186                 iwl_activate_qos(priv, 1);
3187         else if (priv->assoc_id && iwl_is_associated(priv))
3188                 iwl_activate_qos(priv, 0);
3189
3190         spin_unlock_irqrestore(&priv->lock, flags);
3191
3192         IWL_DEBUG_MAC80211("leave\n");
3193         return 0;
3194 }
3195
3196 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
3197                              enum ieee80211_ampdu_mlme_action action,
3198                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3199 {
3200         struct iwl_priv *priv = hw->priv;
3201
3202         IWL_DEBUG_HT("A-MPDU action on addr %pM tid %d\n",
3203                      sta->addr, tid);
3204
3205         if (!(priv->cfg->sku & IWL_SKU_N))
3206                 return -EACCES;
3207
3208         switch (action) {
3209         case IEEE80211_AMPDU_RX_START:
3210                 IWL_DEBUG_HT("start Rx\n");
3211                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
3212         case IEEE80211_AMPDU_RX_STOP:
3213                 IWL_DEBUG_HT("stop Rx\n");
3214                 return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
3215         case IEEE80211_AMPDU_TX_START:
3216                 IWL_DEBUG_HT("start Tx\n");
3217                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
3218         case IEEE80211_AMPDU_TX_STOP:
3219                 IWL_DEBUG_HT("stop Tx\n");
3220                 return iwl_tx_agg_stop(priv, sta->addr, tid);
3221         default:
3222                 IWL_DEBUG_HT("unknown\n");
3223                 return -EINVAL;
3224                 break;
3225         }
3226         return 0;
3227 }
3228
3229 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
3230                                 struct ieee80211_tx_queue_stats *stats)
3231 {
3232         struct iwl_priv *priv = hw->priv;
3233         int i, avail;
3234         struct iwl_tx_queue *txq;
3235         struct iwl_queue *q;
3236         unsigned long flags;
3237
3238         IWL_DEBUG_MAC80211("enter\n");
3239
3240         if (!iwl_is_ready_rf(priv)) {
3241                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3242                 return -EIO;
3243         }
3244
3245         spin_lock_irqsave(&priv->lock, flags);
3246
3247         for (i = 0; i < AC_NUM; i++) {
3248                 txq = &priv->txq[i];
3249                 q = &txq->q;
3250                 avail = iwl_queue_space(q);
3251
3252                 stats[i].len = q->n_window - avail;
3253                 stats[i].limit = q->n_window - q->high_mark;
3254                 stats[i].count = q->n_window;
3255
3256         }
3257         spin_unlock_irqrestore(&priv->lock, flags);
3258
3259         IWL_DEBUG_MAC80211("leave\n");
3260
3261         return 0;
3262 }
3263
3264 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
3265                              struct ieee80211_low_level_stats *stats)
3266 {
3267         struct iwl_priv *priv = hw->priv;
3268
3269         priv = hw->priv;
3270         IWL_DEBUG_MAC80211("enter\n");
3271         IWL_DEBUG_MAC80211("leave\n");
3272
3273         return 0;
3274 }
3275
3276 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
3277 {
3278         struct iwl_priv *priv = hw->priv;
3279         unsigned long flags;
3280
3281         mutex_lock(&priv->mutex);
3282         IWL_DEBUG_MAC80211("enter\n");
3283
3284         spin_lock_irqsave(&priv->lock, flags);
3285         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
3286         spin_unlock_irqrestore(&priv->lock, flags);
3287
3288         iwl_reset_qos(priv);
3289
3290         spin_lock_irqsave(&priv->lock, flags);
3291         priv->assoc_id = 0;
3292         priv->assoc_capability = 0;
3293         priv->assoc_station_added = 0;
3294
3295         /* new association get rid of ibss beacon skb */
3296         if (priv->ibss_beacon)
3297                 dev_kfree_skb(priv->ibss_beacon);
3298
3299         priv->ibss_beacon = NULL;
3300
3301         priv->beacon_int = priv->hw->conf.beacon_int;
3302         priv->timestamp = 0;
3303         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
3304                 priv->beacon_int = 0;
3305
3306         spin_unlock_irqrestore(&priv->lock, flags);
3307
3308         if (!iwl_is_ready_rf(priv)) {
3309                 IWL_DEBUG_MAC80211("leave - not ready\n");
3310                 mutex_unlock(&priv->mutex);
3311                 return;
3312         }
3313
3314         /* we are restarting association process
3315          * clear RXON_FILTER_ASSOC_MSK bit
3316          */
3317         if (priv->iw_mode != NL80211_IFTYPE_AP) {
3318                 iwl_scan_cancel_timeout(priv, 100);
3319                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3320                 iwl_commit_rxon(priv);
3321         }
3322
3323         iwl_power_update_mode(priv, 0);
3324
3325         /* Per mac80211.h: This is only used in IBSS mode... */
3326         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3327
3328                 /* switch to CAM during association period.
3329                  * the ucode will block any association/authentication
3330                  * frome during assiciation period if it can not hear
3331                  * the AP because of PM. the timer enable PM back is
3332                  * association do not complete
3333                  */
3334                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
3335                                                      IEEE80211_CHAN_RADAR))
3336                                 iwl_power_disable_management(priv, 3000);
3337
3338                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
3339                 mutex_unlock(&priv->mutex);
3340                 return;
3341         }
3342
3343         iwl_set_rate(priv);
3344
3345         mutex_unlock(&priv->mutex);
3346
3347         IWL_DEBUG_MAC80211("leave\n");
3348 }
3349
3350 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3351 {
3352         struct iwl_priv *priv = hw->priv;
3353         unsigned long flags;
3354         __le64 timestamp;
3355
3356         IWL_DEBUG_MAC80211("enter\n");
3357
3358         if (!iwl_is_ready_rf(priv)) {
3359                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3360                 return -EIO;
3361         }
3362
3363         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3364                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
3365                 return -EIO;
3366         }
3367
3368         spin_lock_irqsave(&priv->lock, flags);
3369
3370         if (priv->ibss_beacon)
3371                 dev_kfree_skb(priv->ibss_beacon);
3372
3373         priv->ibss_beacon = skb;
3374
3375         priv->assoc_id = 0;
3376         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
3377         priv->timestamp = le64_to_cpu(timestamp);
3378
3379         IWL_DEBUG_MAC80211("leave\n");
3380         spin_unlock_irqrestore(&priv->lock, flags);
3381
3382         iwl_reset_qos(priv);
3383
3384         iwl_post_associate(priv);
3385
3386
3387         return 0;
3388 }
3389
3390 /*****************************************************************************
3391  *
3392  * sysfs attributes
3393  *
3394  *****************************************************************************/
3395
3396 #ifdef CONFIG_IWLWIFI_DEBUG
3397
3398 /*
3399  * The following adds a new attribute to the sysfs representation
3400  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3401  * used for controlling the debug level.
3402  *
3403  * See the level definitions in iwl for details.
3404  */
3405
3406 static ssize_t show_debug_level(struct device *d,
3407                                 struct device_attribute *attr, char *buf)
3408 {
3409         struct iwl_priv *priv = d->driver_data;
3410
3411         return sprintf(buf, "0x%08X\n", priv->debug_level);
3412 }
3413 static ssize_t store_debug_level(struct device *d,
3414                                 struct device_attribute *attr,
3415                                  const char *buf, size_t count)
3416 {
3417         struct iwl_priv *priv = d->driver_data;
3418         unsigned long val;
3419         int ret;
3420
3421         ret = strict_strtoul(buf, 0, &val);
3422         if (ret)
3423                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3424         else
3425                 priv->debug_level = val;
3426
3427         return strnlen(buf, count);
3428 }
3429
3430 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3431                         show_debug_level, store_debug_level);
3432
3433
3434 #endif /* CONFIG_IWLWIFI_DEBUG */
3435
3436
3437 static ssize_t show_version(struct device *d,
3438                                 struct device_attribute *attr, char *buf)
3439 {
3440         struct iwl_priv *priv = d->driver_data;
3441         struct iwl_alive_resp *palive = &priv->card_alive;
3442         ssize_t pos = 0;
3443         u16 eeprom_ver;
3444
3445         if (palive->is_valid)
3446                 pos += sprintf(buf + pos,
3447                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
3448                                 "fw type: 0x%01X 0x%01X\n",
3449                                 palive->ucode_major, palive->ucode_minor,
3450                                 palive->sw_rev[0], palive->sw_rev[1],
3451                                 palive->ver_type, palive->ver_subtype);
3452         else
3453                 pos += sprintf(buf + pos, "fw not loaded\n");
3454
3455         if (priv->eeprom) {
3456                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
3457                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
3458                                  eeprom_ver);
3459         } else {
3460                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
3461         }
3462
3463         return pos;
3464 }
3465
3466 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
3467
3468 static ssize_t show_temperature(struct device *d,
3469                                 struct device_attribute *attr, char *buf)
3470 {
3471         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3472
3473         if (!iwl_is_alive(priv))
3474                 return -EAGAIN;
3475
3476         return sprintf(buf, "%d\n", priv->temperature);
3477 }
3478
3479 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3480
3481 static ssize_t show_tx_power(struct device *d,
3482                              struct device_attribute *attr, char *buf)
3483 {
3484         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3485
3486         if (!iwl_is_ready_rf(priv))
3487                 return sprintf(buf, "off\n");
3488         else
3489                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3490 }
3491
3492 static ssize_t store_tx_power(struct device *d,
3493                               struct device_attribute *attr,
3494                               const char *buf, size_t count)
3495 {
3496         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3497         unsigned long val;
3498         int ret;
3499
3500         ret = strict_strtoul(buf, 10, &val);
3501         if (ret)
3502                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3503         else
3504                 iwl_set_tx_power(priv, val, false);
3505
3506         return count;
3507 }
3508
3509 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3510
3511 static ssize_t show_flags(struct device *d,
3512                           struct device_attribute *attr, char *buf)
3513 {
3514         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3515
3516         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3517 }
3518
3519 static ssize_t store_flags(struct device *d,
3520                            struct device_attribute *attr,
3521                            const char *buf, size_t count)
3522 {
3523         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3524         unsigned long val;
3525         u32 flags;
3526         int ret = strict_strtoul(buf, 0, &val);
3527         if (ret)
3528                 return ret;
3529         flags = (u32)val;
3530
3531         mutex_lock(&priv->mutex);
3532         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3533                 /* Cancel any currently running scans... */
3534                 if (iwl_scan_cancel_timeout(priv, 100))
3535                         IWL_WARN(priv, "Could not cancel scan.\n");
3536                 else {
3537                         IWL_DEBUG_INFO("Commit rxon.flags = 0x%04X\n", flags);
3538                         priv->staging_rxon.flags = cpu_to_le32(flags);
3539                         iwl_commit_rxon(priv);
3540                 }
3541         }
3542         mutex_unlock(&priv->mutex);
3543
3544         return count;
3545 }
3546
3547 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3548
3549 static ssize_t show_filter_flags(struct device *d,
3550                                  struct device_attribute *attr, char *buf)
3551 {
3552         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3553
3554         return sprintf(buf, "0x%04X\n",
3555                 le32_to_cpu(priv->active_rxon.filter_flags));
3556 }
3557
3558 static ssize_t store_filter_flags(struct device *d,
3559                                   struct device_attribute *attr,
3560                                   const char *buf, size_t count)
3561 {
3562         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3563         unsigned long val;
3564         u32 filter_flags;
3565         int ret = strict_strtoul(buf, 0, &val);
3566         if (ret)
3567                 return ret;
3568         filter_flags = (u32)val;
3569
3570         mutex_lock(&priv->mutex);
3571         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3572                 /* Cancel any currently running scans... */
3573                 if (iwl_scan_cancel_timeout(priv, 100))
3574                         IWL_WARN(priv, "Could not cancel scan.\n");
3575                 else {
3576                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
3577                                        "0x%04X\n", filter_flags);
3578                         priv->staging_rxon.filter_flags =
3579                                 cpu_to_le32(filter_flags);
3580                         iwl_commit_rxon(priv);
3581                 }
3582         }
3583         mutex_unlock(&priv->mutex);
3584
3585         return count;
3586 }
3587
3588 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3589                    store_filter_flags);
3590
3591 static ssize_t store_power_level(struct device *d,
3592                                  struct device_attribute *attr,
3593                                  const char *buf, size_t count)
3594 {
3595         struct iwl_priv *priv = dev_get_drvdata(d);
3596         int ret;
3597         unsigned long mode;
3598
3599
3600         mutex_lock(&priv->mutex);
3601
3602         if (!iwl_is_ready(priv)) {
3603                 ret = -EAGAIN;
3604                 goto out;
3605         }
3606
3607         ret = strict_strtoul(buf, 10, &mode);
3608         if (ret)
3609                 goto out;
3610
3611         ret = iwl_power_set_user_mode(priv, mode);
3612         if (ret) {
3613                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
3614                 goto out;
3615         }
3616         ret = count;
3617
3618  out:
3619         mutex_unlock(&priv->mutex);
3620         return ret;
3621 }
3622
3623 static ssize_t show_power_level(struct device *d,
3624                                 struct device_attribute *attr, char *buf)
3625 {
3626         struct iwl_priv *priv = dev_get_drvdata(d);
3627         int mode = priv->power_data.user_power_setting;
3628         int system = priv->power_data.system_power_setting;
3629         int level = priv->power_data.power_mode;
3630         char *p = buf;
3631
3632         switch (system) {
3633         case IWL_POWER_SYS_AUTO:
3634                 p += sprintf(p, "SYSTEM:auto");
3635                 break;
3636         case IWL_POWER_SYS_AC:
3637                 p += sprintf(p, "SYSTEM:ac");
3638                 break;
3639         case IWL_POWER_SYS_BATTERY:
3640                 p += sprintf(p, "SYSTEM:battery");
3641                 break;
3642         }
3643
3644         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3645                         "fixed" : "auto");
3646         p += sprintf(p, "\tINDEX:%d", level);
3647         p += sprintf(p, "\n");
3648         return p - buf + 1;
3649 }
3650
3651 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3652                    store_power_level);
3653
3654
3655 static ssize_t show_statistics(struct device *d,
3656                                struct device_attribute *attr, char *buf)
3657 {
3658         struct iwl_priv *priv = dev_get_drvdata(d);
3659         u32 size = sizeof(struct iwl_notif_statistics);
3660         u32 len = 0, ofs = 0;
3661         u8 *data = (u8 *)&priv->statistics;
3662         int rc = 0;
3663
3664         if (!iwl_is_alive(priv))
3665                 return -EAGAIN;
3666
3667         mutex_lock(&priv->mutex);
3668         rc = iwl_send_statistics_request(priv, 0);
3669         mutex_unlock(&priv->mutex);
3670
3671         if (rc) {
3672                 len = sprintf(buf,
3673                               "Error sending statistics request: 0x%08X\n", rc);
3674                 return len;
3675         }
3676
3677         while (size && (PAGE_SIZE - len)) {
3678                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3679                                    PAGE_SIZE - len, 1);
3680                 len = strlen(buf);
3681                 if (PAGE_SIZE - len)
3682                         buf[len++] = '\n';
3683
3684                 ofs += 16;
3685                 size -= min(size, 16U);
3686         }
3687
3688         return len;
3689 }
3690
3691 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3692
3693
3694 /*****************************************************************************
3695  *
3696  * driver setup and teardown
3697  *
3698  *****************************************************************************/
3699
3700 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3701 {
3702         priv->workqueue = create_workqueue(DRV_NAME);
3703
3704         init_waitqueue_head(&priv->wait_command_queue);
3705
3706         INIT_WORK(&priv->up, iwl_bg_up);
3707         INIT_WORK(&priv->restart, iwl_bg_restart);
3708         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3709         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3710         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3711         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3712         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3713         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3714
3715         iwl_setup_scan_deferred_work(priv);
3716         iwl_setup_power_deferred_work(priv);
3717
3718         if (priv->cfg->ops->lib->setup_deferred_work)
3719                 priv->cfg->ops->lib->setup_deferred_work(priv);
3720
3721         init_timer(&priv->statistics_periodic);
3722         priv->statistics_periodic.data = (unsigned long)priv;
3723         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3724
3725         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3726                      iwl_irq_tasklet, (unsigned long)priv);
3727 }
3728
3729 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3730 {
3731         if (priv->cfg->ops->lib->cancel_deferred_work)
3732                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3733
3734         cancel_delayed_work_sync(&priv->init_alive_start);
3735         cancel_delayed_work(&priv->scan_check);
3736         cancel_delayed_work_sync(&priv->set_power_save);
3737         cancel_delayed_work(&priv->alive_start);
3738         cancel_work_sync(&priv->beacon_update);
3739         del_timer_sync(&priv->statistics_periodic);
3740 }
3741
3742 static struct attribute *iwl_sysfs_entries[] = {
3743         &dev_attr_flags.attr,
3744         &dev_attr_filter_flags.attr,
3745         &dev_attr_power_level.attr,
3746         &dev_attr_statistics.attr,
3747         &dev_attr_temperature.attr,
3748         &dev_attr_tx_power.attr,
3749 #ifdef CONFIG_IWLWIFI_DEBUG
3750         &dev_attr_debug_level.attr,
3751 #endif
3752         &dev_attr_version.attr,
3753
3754         NULL
3755 };
3756
3757 static struct attribute_group iwl_attribute_group = {
3758         .name = NULL,           /* put in device directory */
3759         .attrs = iwl_sysfs_entries,
3760 };
3761
3762 static struct ieee80211_ops iwl_hw_ops = {
3763         .tx = iwl_mac_tx,
3764         .start = iwl_mac_start,
3765         .stop = iwl_mac_stop,
3766         .add_interface = iwl_mac_add_interface,
3767         .remove_interface = iwl_mac_remove_interface,
3768         .config = iwl_mac_config,
3769         .config_interface = iwl_mac_config_interface,
3770         .configure_filter = iwl_configure_filter,
3771         .set_key = iwl_mac_set_key,
3772         .update_tkip_key = iwl_mac_update_tkip_key,
3773         .get_stats = iwl_mac_get_stats,
3774         .get_tx_stats = iwl_mac_get_tx_stats,
3775         .conf_tx = iwl_mac_conf_tx,
3776         .reset_tsf = iwl_mac_reset_tsf,
3777         .bss_info_changed = iwl_bss_info_changed,
3778         .ampdu_action = iwl_mac_ampdu_action,
3779         .hw_scan = iwl_mac_hw_scan
3780 };
3781
3782 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3783 {
3784         int err = 0;
3785         struct iwl_priv *priv;
3786         struct ieee80211_hw *hw;
3787         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3788         unsigned long flags;
3789         u16 pci_cmd;
3790
3791         /************************
3792          * 1. Allocating HW data
3793          ************************/
3794
3795         /* Disabling hardware scan means that mac80211 will perform scans
3796          * "the hard way", rather than using device's scan. */
3797         if (cfg->mod_params->disable_hw_scan) {
3798                 if (cfg->mod_params->debug & IWL_DL_INFO)
3799                         dev_printk(KERN_DEBUG, &(pdev->dev),
3800                                    "Disabling hw_scan\n");
3801                 iwl_hw_ops.hw_scan = NULL;
3802         }
3803
3804         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3805         if (!hw) {
3806                 err = -ENOMEM;
3807                 goto out;
3808         }
3809         priv = hw->priv;
3810         /* At this point both hw and priv are allocated. */
3811
3812         SET_IEEE80211_DEV(hw, &pdev->dev);
3813
3814         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
3815         priv->cfg = cfg;
3816         priv->pci_dev = pdev;
3817
3818 #ifdef CONFIG_IWLWIFI_DEBUG
3819         priv->debug_level = priv->cfg->mod_params->debug;
3820         atomic_set(&priv->restrict_refcnt, 0);
3821 #endif
3822
3823         /**************************
3824          * 2. Initializing PCI bus
3825          **************************/
3826         if (pci_enable_device(pdev)) {
3827                 err = -ENODEV;
3828                 goto out_ieee80211_free_hw;
3829         }
3830
3831         pci_set_master(pdev);
3832
3833         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3834         if (!err)
3835                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3836         if (err) {
3837                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3838                 if (!err)
3839                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3840                 /* both attempts failed: */
3841                 if (err) {
3842                         IWL_WARN(priv, "No suitable DMA available.\n");
3843                         goto out_pci_disable_device;
3844                 }
3845         }
3846
3847         err = pci_request_regions(pdev, DRV_NAME);
3848         if (err)
3849                 goto out_pci_disable_device;
3850
3851         pci_set_drvdata(pdev, priv);
3852
3853
3854         /***********************
3855          * 3. Read REV register
3856          ***********************/
3857         priv->hw_base = pci_iomap(pdev, 0, 0);
3858         if (!priv->hw_base) {
3859                 err = -ENODEV;
3860                 goto out_pci_release_regions;
3861         }
3862
3863         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
3864                 (unsigned long long) pci_resource_len(pdev, 0));
3865         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
3866
3867         iwl_hw_detect(priv);
3868         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3869                 priv->cfg->name, priv->hw_rev);
3870
3871         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3872          * PCI Tx retries from interfering with C3 CPU state */
3873         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3874
3875         /* amp init */
3876         err = priv->cfg->ops->lib->apm_ops.init(priv);
3877         if (err < 0) {
3878                 IWL_DEBUG_INFO("Failed to init APMG\n");
3879                 goto out_iounmap;
3880         }
3881         /*****************
3882          * 4. Read EEPROM
3883          *****************/
3884         /* Read the EEPROM */
3885         err = iwl_eeprom_init(priv);
3886         if (err) {
3887                 IWL_ERR(priv, "Unable to init EEPROM\n");
3888                 goto out_iounmap;
3889         }
3890         err = iwl_eeprom_check_version(priv);
3891         if (err)
3892                 goto out_iounmap;
3893
3894         /* extract MAC Address */
3895         iwl_eeprom_get_mac(priv, priv->mac_addr);
3896         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
3897         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3898
3899         /************************
3900          * 5. Setup HW constants
3901          ************************/
3902         if (iwl_set_hw_params(priv)) {
3903                 IWL_ERR(priv, "failed to set hw parameters\n");
3904                 goto out_free_eeprom;
3905         }
3906
3907         /*******************
3908          * 6. Setup priv
3909          *******************/
3910
3911         err = iwl_init_drv(priv);
3912         if (err)
3913                 goto out_free_eeprom;
3914         /* At this point both hw and priv are initialized. */
3915
3916         /**********************************
3917          * 7. Initialize module parameters
3918          **********************************/
3919
3920         /* Disable radio (SW RF KILL) via parameter when loading driver */
3921         if (priv->cfg->mod_params->disable) {
3922                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3923                 IWL_DEBUG_INFO("Radio disabled.\n");
3924         }
3925
3926         /********************
3927          * 8. Setup services
3928          ********************/
3929         spin_lock_irqsave(&priv->lock, flags);
3930         iwl_disable_interrupts(priv);
3931         spin_unlock_irqrestore(&priv->lock, flags);
3932
3933         pci_enable_msi(priv->pci_dev);
3934
3935         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3936                           DRV_NAME, priv);
3937         if (err) {
3938                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3939                 goto out_disable_msi;
3940         }
3941         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3942         if (err) {
3943                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3944                 goto out_uninit_drv;
3945         }
3946
3947         iwl_setup_deferred_work(priv);
3948         iwl_setup_rx_handlers(priv);
3949
3950         /**********************************
3951          * 9. Setup and register mac80211
3952          **********************************/
3953
3954         /* enable interrupts if needed: hw bug w/a */
3955         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3956         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3957                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3958                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3959         }
3960
3961         iwl_enable_interrupts(priv);
3962
3963         err = iwl_setup_mac(priv);
3964         if (err)
3965                 goto out_remove_sysfs;
3966
3967         err = iwl_dbgfs_register(priv, DRV_NAME);
3968         if (err)
3969                 IWL_ERR(priv, "failed to create debugfs files\n");
3970
3971         /* If platform's RF_KILL switch is NOT set to KILL */
3972         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3973                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3974         else
3975                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3976
3977         err = iwl_rfkill_init(priv);
3978         if (err)
3979                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3980                                   "Ignoring error: %d\n", err);
3981         else
3982                 iwl_rfkill_set_hw_state(priv);
3983
3984         iwl_power_initialize(priv);
3985         return 0;
3986
3987  out_remove_sysfs:
3988         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3989  out_disable_msi:
3990         pci_disable_msi(priv->pci_dev);
3991         pci_disable_device(priv->pci_dev);
3992  out_uninit_drv:
3993         iwl_uninit_drv(priv);
3994  out_free_eeprom:
3995         iwl_eeprom_free(priv);
3996  out_iounmap:
3997         pci_iounmap(pdev, priv->hw_base);
3998  out_pci_release_regions:
3999         pci_release_regions(pdev);
4000         pci_set_drvdata(pdev, NULL);
4001  out_pci_disable_device:
4002         pci_disable_device(pdev);
4003  out_ieee80211_free_hw:
4004         ieee80211_free_hw(priv->hw);
4005  out:
4006         return err;
4007 }
4008
4009 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
4010 {
4011         struct iwl_priv *priv = pci_get_drvdata(pdev);
4012         unsigned long flags;
4013
4014         if (!priv)
4015                 return;
4016
4017         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
4018
4019         iwl_dbgfs_unregister(priv);
4020         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
4021
4022         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
4023          * to be called and iwl_down since we are removing the device
4024          * we need to set STATUS_EXIT_PENDING bit.
4025          */
4026         set_bit(STATUS_EXIT_PENDING, &priv->status);
4027         if (priv->mac80211_registered) {
4028                 ieee80211_unregister_hw(priv->hw);
4029                 priv->mac80211_registered = 0;
4030         } else {
4031                 iwl_down(priv);
4032         }
4033
4034         /* make sure we flush any pending irq or
4035          * tasklet for the driver
4036          */
4037         spin_lock_irqsave(&priv->lock, flags);
4038         iwl_disable_interrupts(priv);
4039         spin_unlock_irqrestore(&priv->lock, flags);
4040
4041         iwl_synchronize_irq(priv);
4042
4043         iwl_rfkill_unregister(priv);
4044         iwl_dealloc_ucode_pci(priv);
4045
4046         if (priv->rxq.bd)
4047                 iwl_rx_queue_free(priv, &priv->rxq);
4048         iwl_hw_txq_ctx_free(priv);
4049
4050         iwl_clear_stations_table(priv);
4051         iwl_eeprom_free(priv);
4052
4053
4054         /*netif_stop_queue(dev); */
4055         flush_workqueue(priv->workqueue);
4056
4057         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
4058          * priv->workqueue... so we can't take down the workqueue
4059          * until now... */
4060         destroy_workqueue(priv->workqueue);
4061         priv->workqueue = NULL;
4062
4063         free_irq(priv->pci_dev->irq, priv);
4064         pci_disable_msi(priv->pci_dev);
4065         pci_iounmap(pdev, priv->hw_base);
4066         pci_release_regions(pdev);
4067         pci_disable_device(pdev);
4068         pci_set_drvdata(pdev, NULL);
4069
4070         iwl_uninit_drv(priv);
4071
4072         if (priv->ibss_beacon)
4073                 dev_kfree_skb(priv->ibss_beacon);
4074
4075         ieee80211_free_hw(priv->hw);
4076 }
4077
4078 #ifdef CONFIG_PM
4079
4080 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
4081 {
4082         struct iwl_priv *priv = pci_get_drvdata(pdev);
4083
4084         if (priv->is_open) {
4085                 set_bit(STATUS_IN_SUSPEND, &priv->status);
4086                 iwl_mac_stop(priv->hw);
4087                 priv->is_open = 1;
4088         }
4089
4090         pci_save_state(pdev);
4091         pci_disable_device(pdev);
4092         pci_set_power_state(pdev, PCI_D3hot);
4093
4094         return 0;
4095 }
4096
4097 static int iwl_pci_resume(struct pci_dev *pdev)
4098 {
4099         struct iwl_priv *priv = pci_get_drvdata(pdev);
4100
4101         pci_set_power_state(pdev, PCI_D0);
4102         pci_enable_device(pdev);
4103         pci_restore_state(pdev);
4104         iwl_enable_interrupts(priv);
4105
4106         if (priv->is_open)
4107                 iwl_mac_start(priv->hw);
4108
4109         clear_bit(STATUS_IN_SUSPEND, &priv->status);
4110         return 0;
4111 }
4112
4113 #endif /* CONFIG_PM */
4114
4115 /*****************************************************************************
4116  *
4117  * driver and module entry point
4118  *
4119  *****************************************************************************/
4120
4121 /* Hardware specific file defines the PCI IDs table for that hardware module */
4122 static struct pci_device_id iwl_hw_card_ids[] = {
4123 #ifdef CONFIG_IWL4965
4124         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4125         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4126 #endif /* CONFIG_IWL4965 */
4127 #ifdef CONFIG_IWL5000
4128         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
4129         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
4130         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
4131         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
4132         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
4133         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
4134         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
4135         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
4136         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
4137         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
4138 /* 5350 WiFi/WiMax */
4139         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
4140         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
4141         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
4142 /* 5150 Wifi/WiMax */
4143         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
4144         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
4145 /* 6000/6050 Series */
4146         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
4147         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
4148         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
4149         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
4150         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
4151         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
4152         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
4153         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
4154         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
4155         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
4156         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
4157 /* 100 Series WiFi */
4158         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl100_bgn_cfg)},
4159         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl100_bgn_cfg)},
4160 #endif /* CONFIG_IWL5000 */
4161
4162         {0}
4163 };
4164 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
4165
4166 static struct pci_driver iwl_driver = {
4167         .name = DRV_NAME,
4168         .id_table = iwl_hw_card_ids,
4169         .probe = iwl_pci_probe,
4170         .remove = __devexit_p(iwl_pci_remove),
4171 #ifdef CONFIG_PM
4172         .suspend = iwl_pci_suspend,
4173         .resume = iwl_pci_resume,
4174 #endif
4175 };
4176
4177 static int __init iwl_init(void)
4178 {
4179
4180         int ret;
4181         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4182         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4183
4184         ret = iwlagn_rate_control_register();
4185         if (ret) {
4186                 printk(KERN_ERR DRV_NAME
4187                        "Unable to register rate control algorithm: %d\n", ret);
4188                 return ret;
4189         }
4190
4191         ret = pci_register_driver(&iwl_driver);
4192         if (ret) {
4193                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4194                 goto error_register;
4195         }
4196
4197         return ret;
4198
4199 error_register:
4200         iwlagn_rate_control_unregister();
4201         return ret;
4202 }
4203
4204 static void __exit iwl_exit(void)
4205 {
4206         pci_unregister_driver(&iwl_driver);
4207         iwlagn_rate_control_unregister();
4208 }
4209
4210 module_exit(iwl_exit);
4211 module_init(iwl_init);