git.oblomov.eu Git - linux-2.6/blob - 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_IWLWIFI_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  * iwl_commit_rxon - commit staging_rxon to hardware
  99  *
 100  * The RXON command in staging_rxon is committed to the hardware and
 101  * the active_rxon structure is updated with the new data.  This
 102  * function correctly transitions out of the RXON_ASSOC_MSK state if
 103  * a HW tune is required based on the RXON structure changes.
 104  */
 105 int iwl_commit_rxon(struct iwl_priv *priv)
 106 {
 107         /* cast away the const for active_rxon in this function */
 108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 109         int ret;
 110         bool new_assoc =
 111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 112
 113         if (!iwl_is_alive(priv))
 114                 return -EBUSY;
 115
 116         /* always get timestamp with Rx frame */
 117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 118         /* allow CTS-to-self if possible. this is relevant only for
 119          * 5000, but will not damage 4965 */
 120         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 121
 122         ret = iwl_check_rxon_cmd(priv);
 123         if (ret) {
 124                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 125                 return -EINVAL;
 126         }
 127
 128         /* If we don't need to send a full RXON, we can use
 129          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 130          * and other flags for the current radio configuration. */
 131         if (!iwl_full_rxon_required(priv)) {
 132                 ret = iwl_send_rxon_assoc(priv);
 133                 if (ret) {
 134                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 135                         return ret;
 136                 }
 137
 138                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 139                 return 0;
 140         }
 141
 142         /* station table will be cleared */
 143         priv->assoc_station_added = 0;
 144
 145         /* If we are currently associated and the new config requires
 146          * an RXON_ASSOC and the new config wants the associated mask enabled,
 147          * we must clear the associated from the active configuration
 148          * before we apply the new config */
 149         if (iwl_is_associated(priv) && new_assoc) {
 150                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 151                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 152
 153                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 154                                       sizeof(struct iwl_rxon_cmd),
 155                                       &priv->active_rxon);
 156
 157                 /* If the mask clearing failed then we set
 158                  * active_rxon back to what it was previously */
 159                 if (ret) {
 160                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 161                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 162                         return ret;
 163                 }
 164         }
 165
 166         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 167                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 168                        "* channel = %d\n"
 169                        "* bssid = %pM\n",
 170                        (new_assoc ? "" : "out"),
 171                        le16_to_cpu(priv->staging_rxon.channel),
 172                        priv->staging_rxon.bssid_addr);
 173
 174         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 175
 176         /* Apply the new configuration
 177          * RXON unassoc clears the station table in uCode, send it before
 178          * we add the bcast station. If assoc bit is set, we will send RXON
 179          * after having added the bcast and bssid station.
 180          */
 181         if (!new_assoc) {
 182                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 183                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 184                 if (ret) {
 185                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 186                         return ret;
 187                 }
 188                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 189         }
 190
 191         iwl_clear_stations_table(priv);
 192
 193         priv->start_calib = 0;
 194
 195         /* Add the broadcast address so we can send broadcast frames */
 196         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 197                                                 IWL_INVALID_STATION) {
 198                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 199                 return -EIO;
 200         }
 201
 202         /* If we have set the ASSOC_MSK and we are in BSS mode then
 203          * add the IWL_AP_ID to the station rate table */
 204         if (new_assoc) {
 205                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 206                         ret = iwl_rxon_add_station(priv,
 207                                            priv->active_rxon.bssid_addr, 1);
 208                         if (ret == IWL_INVALID_STATION) {
 209                                 IWL_ERR(priv,
 210                                         "Error adding AP address for TX.\n");
 211                                 return -EIO;
 212                         }
 213                         priv->assoc_station_added = 1;
 214                         if (priv->default_wep_key &&
 215                             iwl_send_static_wepkey_cmd(priv, 0))
 216                                 IWL_ERR(priv,
 217                                         "Could not send WEP static key.\n");
 218                 }
 219
 220                 /* Apply the new configuration
 221                  * RXON assoc doesn't clear the station table in uCode,
 222                  */
 223                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 224                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 225                 if (ret) {
 226                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 227                         return ret;
 228                 }
 229                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 230         }
 231
 232         iwl_init_sensitivity(priv);
 233
 234         /* If we issue a new RXON command which required a tune then we must
 235          * send a new TXPOWER command or we won't be able to Tx any frames */
 236         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 237         if (ret) {
 238                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 239                 return ret;
 240         }
 241
 242         return 0;
 243 }
 244
 245 void iwl_update_chain_flags(struct iwl_priv *priv)
 246 {
 247
 248         if (priv->cfg->ops->hcmd->set_rxon_chain)
 249                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 250         iwlcore_commit_rxon(priv);
 251 }
 252
 253 static void iwl_clear_free_frames(struct iwl_priv *priv)
 254 {
 255         struct list_head *element;
 256
 257         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 258                        priv->frames_count);
 259
 260         while (!list_empty(&priv->free_frames)) {
 261                 element = priv->free_frames.next;
 262                 list_del(element);
 263                 kfree(list_entry(element, struct iwl_frame, list));
 264                 priv->frames_count--;
 265         }
 266
 267         if (priv->frames_count) {
 268                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 269                             priv->frames_count);
 270                 priv->frames_count = 0;
 271         }
 272 }
 273
 274 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 275 {
 276         struct iwl_frame *frame;
 277         struct list_head *element;
 278         if (list_empty(&priv->free_frames)) {
 279                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 280                 if (!frame) {
 281                         IWL_ERR(priv, "Could not allocate frame!\n");
 282                         return NULL;
 283                 }
 284
 285                 priv->frames_count++;
 286                 return frame;
 287         }
 288
 289         element = priv->free_frames.next;
 290         list_del(element);
 291         return list_entry(element, struct iwl_frame, list);
 292 }
 293
 294 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 295 {
 296         memset(frame, 0, sizeof(*frame));
 297         list_add(&frame->list, &priv->free_frames);
 298 }
 299
 300 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 301                                           struct ieee80211_hdr *hdr,
 302                                           int left)
 303 {
 304         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 305             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 306              (priv->iw_mode != NL80211_IFTYPE_AP)))
 307                 return 0;
 308
 309         if (priv->ibss_beacon->len > left)
 310                 return 0;
 311
 312         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 313
 314         return priv->ibss_beacon->len;
 315 }
 316
 317 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 318                                        struct iwl_frame *frame, u8 rate)
 319 {
 320         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 321         unsigned int frame_size;
 322
 323         tx_beacon_cmd = &frame->u.beacon;
 324         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 325
 326         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 327         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 328
 329         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 330                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 331
 332         BUG_ON(frame_size > MAX_MPDU_SIZE);
 333         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 334
 335         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 336                 tx_beacon_cmd->tx.rate_n_flags =
 337                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 338         else
 339                 tx_beacon_cmd->tx.rate_n_flags =
 340                         iwl_hw_set_rate_n_flags(rate, 0);
 341
 342         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 343                                      TX_CMD_FLG_TSF_MSK |
 344                                      TX_CMD_FLG_STA_RATE_MSK;
 345
 346         return sizeof(*tx_beacon_cmd) + frame_size;
 347 }
 348 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 349 {
 350         struct iwl_frame *frame;
 351         unsigned int frame_size;
 352         int rc;
 353         u8 rate;
 354
 355         frame = iwl_get_free_frame(priv);
 356
 357         if (!frame) {
 358                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 359                           "command.\n");
 360                 return -ENOMEM;
 361         }
 362
 363         rate = iwl_rate_get_lowest_plcp(priv);
 364
 365         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 366
 367         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 368                               &frame->u.cmd[0]);
 369
 370         iwl_free_frame(priv, frame);
 371
 372         return rc;
 373 }
 374
 375 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 376 {
 377         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 378
 379         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 380         if (sizeof(dma_addr_t) > sizeof(u32))
 381                 addr |=
 382                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 383
 384         return addr;
 385 }
 386
 387 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 388 {
 389         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 390
 391         return le16_to_cpu(tb->hi_n_len) >> 4;
 392 }
 393
 394 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 395                                   dma_addr_t addr, u16 len)
 396 {
 397         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 398         u16 hi_n_len = len << 4;
 399
 400         put_unaligned_le32(addr, &tb->lo);
 401         if (sizeof(dma_addr_t) > sizeof(u32))
 402                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 403
 404         tb->hi_n_len = cpu_to_le16(hi_n_len);
 405
 406         tfd->num_tbs = idx + 1;
 407 }
 408
 409 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 410 {
 411         return tfd->num_tbs & 0x1f;
 412 }
 413
 414 /**
 415  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 416  * @priv - driver private data
 417  * @txq - tx queue
 418  *
 419  * Does NOT advance any TFD circular buffer read/write indexes
 420  * Does NOT free the TFD itself (which is within circular buffer)
 421  */
 422 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 423 {
 424         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 425         struct iwl_tfd *tfd;
 426         struct pci_dev *dev = priv->pci_dev;
 427         int index = txq->q.read_ptr;
 428         int i;
 429         int num_tbs;
 430
 431         tfd = &tfd_tmp[index];
 432
 433         /* Sanity check on number of chunks */
 434         num_tbs = iwl_tfd_get_num_tbs(tfd);
 435
 436         if (num_tbs >= IWL_NUM_OF_TBS) {
 437                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 438                 /* @todo issue fatal error, it is quite serious situation */
 439                 return;
 440         }
 441
 442         /* Unmap tx_cmd */
 443         if (num_tbs)
 444                 pci_unmap_single(dev,
 445                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
 446                                 pci_unmap_len(&txq->cmd[index]->meta, len),
 447                                 PCI_DMA_BIDIRECTIONAL);
 448
 449         /* Unmap chunks, if any. */
 450         for (i = 1; i < num_tbs; i++) {
 451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 453
 454                 if (txq->txb) {
 455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 457                 }
 458         }
 459 }
 460
 461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 462                                  struct iwl_tx_queue *txq,
 463                                  dma_addr_t addr, u16 len,
 464                                  u8 reset, u8 pad)
 465 {
 466         struct iwl_queue *q;
 467         struct iwl_tfd *tfd, *tfd_tmp;
 468         u32 num_tbs;
 469
 470         q = &txq->q;
 471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 472         tfd = &tfd_tmp[q->write_ptr];
 473
 474         if (reset)
 475                 memset(tfd, 0, sizeof(*tfd));
 476
 477         num_tbs = iwl_tfd_get_num_tbs(tfd);
 478
 479         /* Each TFD can point to a maximum 20 Tx buffers */
 480         if (num_tbs >= IWL_NUM_OF_TBS) {
 481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 482                           IWL_NUM_OF_TBS);
 483                 return -EINVAL;
 484         }
 485
 486         BUG_ON(addr & ~DMA_BIT_MASK(36));
 487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 488                 IWL_ERR(priv, "Unaligned address = %llx\n",
 489                           (unsigned long long)addr);
 490
 491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 498  * given Tx queue, and enable the DMA channel used for that queue.
 499  *
 500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 501  * channels supported in hardware.
 502  */
 503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 504                          struct iwl_tx_queue *txq)
 505 {
 506         int txq_id = txq->q.id;
 507
 508         /* Circular buffer (TFD queue in DRAM) physical base address */
 509         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 510                              txq->q.dma_addr >> 8);
 511
 512         return 0;
 513 }
 514
 515
 516 /******************************************************************************
 517  *
 518  * Misc. internal state and helper functions
 519  *
 520  ******************************************************************************/
 521
 522 #define MAX_UCODE_BEACON_INTERVAL       4096
 523
 524 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 525 {
 526         u16 new_val = 0;
 527         u16 beacon_factor = 0;
 528
 529         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 530                                         / MAX_UCODE_BEACON_INTERVAL;
 531         new_val = beacon_val / beacon_factor;
 532
 533         if (!new_val)
 534                 new_val = MAX_UCODE_BEACON_INTERVAL;
 535
 536         return new_val;
 537 }
 538
 539 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 540 {
 541         u64 tsf;
 542         s32 interval_tm, rem;
 543         unsigned long flags;
 544         struct ieee80211_conf *conf = NULL;
 545         u16 beacon_int = 0;
 546
 547         conf = ieee80211_get_hw_conf(priv->hw);
 548
 549         spin_lock_irqsave(&priv->lock, flags);
 550         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 551         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 552
 553         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 554                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 555                 priv->rxon_timing.atim_window = 0;
 556         } else {
 557                 beacon_int = iwl_adjust_beacon_interval(
 558                         priv->vif->bss_conf.beacon_int);
 559
 560                 /* TODO: we need to get atim_window from upper stack
 561                  * for now we set to 0 */
 562                 priv->rxon_timing.atim_window = 0;
 563         }
 564
 565         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 566
 567         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 568         interval_tm = beacon_int * 1024;
 569         rem = do_div(tsf, interval_tm);
 570         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 571
 572         spin_unlock_irqrestore(&priv->lock, flags);
 573         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
 574                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 575                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 576                         le16_to_cpu(priv->rxon_timing.atim_window));
 577 }
 578
 579 /******************************************************************************
 580  *
 581  * Generic RX handler implementations
 582  *
 583  ******************************************************************************/
 584 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 585                                 struct iwl_rx_mem_buffer *rxb)
 586 {
 587         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 588         struct iwl_alive_resp *palive;
 589         struct delayed_work *pwork;
 590
 591         palive = &pkt->u.alive_frame;
 592
 593         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 594                        "0x%01X 0x%01X\n",
 595                        palive->is_valid, palive->ver_type,
 596                        palive->ver_subtype);
 597
 598         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 599                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 600                 memcpy(&priv->card_alive_init,
 601                        &pkt->u.alive_frame,
 602                        sizeof(struct iwl_init_alive_resp));
 603                 pwork = &priv->init_alive_start;
 604         } else {
 605                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 606                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 607                        sizeof(struct iwl_alive_resp));
 608                 pwork = &priv->alive_start;
 609         }
 610
 611         /* We delay the ALIVE response by 5ms to
 612          * give the HW RF Kill time to activate... */
 613         if (palive->is_valid == UCODE_VALID_OK)
 614                 queue_delayed_work(priv->workqueue, pwork,
 615                                    msecs_to_jiffies(5));
 616         else
 617                 IWL_WARN(priv, "uCode did not respond OK.\n");
 618 }
 619
 620 static void iwl_bg_beacon_update(struct work_struct *work)
 621 {
 622         struct iwl_priv *priv =
 623                 container_of(work, struct iwl_priv, beacon_update);
 624         struct sk_buff *beacon;
 625
 626         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 627         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 628
 629         if (!beacon) {
 630                 IWL_ERR(priv, "update beacon failed\n");
 631                 return;
 632         }
 633
 634         mutex_lock(&priv->mutex);
 635         /* new beacon skb is allocated every time; dispose previous.*/
 636         if (priv->ibss_beacon)
 637                 dev_kfree_skb(priv->ibss_beacon);
 638
 639         priv->ibss_beacon = beacon;
 640         mutex_unlock(&priv->mutex);
 641
 642         iwl_send_beacon_cmd(priv);
 643 }
 644
 645 /**
 646  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 647  *
 648  * This callback is provided in order to send a statistics request.
 649  *
 650  * This timer function is continually reset to execute within
 651  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 652  * was received.  We need to ensure we receive the statistics in order
 653  * to update the temperature used for calibrating the TXPOWER.
 654  */
 655 static void iwl_bg_statistics_periodic(unsigned long data)
 656 {
 657         struct iwl_priv *priv = (struct iwl_priv *)data;
 658
 659         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 660                 return;
 661
 662         /* dont send host command if rf-kill is on */
 663         if (!iwl_is_ready_rf(priv))
 664                 return;
 665
 666         iwl_send_statistics_request(priv, CMD_ASYNC);
 667 }
 668
 669 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 670                                 struct iwl_rx_mem_buffer *rxb)
 671 {
 672 #ifdef CONFIG_IWLWIFI_DEBUG
 673         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 674         struct iwl4965_beacon_notif *beacon =
 675                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 676         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 677
 678         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 679                 "tsf %d %d rate %d\n",
 680                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 681                 beacon->beacon_notify_hdr.failure_frame,
 682                 le32_to_cpu(beacon->ibss_mgr_status),
 683                 le32_to_cpu(beacon->high_tsf),
 684                 le32_to_cpu(beacon->low_tsf), rate);
 685 #endif
 686
 687         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 688             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 689                 queue_work(priv->workqueue, &priv->beacon_update);
 690 }
 691
 692 /* Handle notification from uCode that card's power state is changing
 693  * due to software, hardware, or critical temperature RFKILL */
 694 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 695                                     struct iwl_rx_mem_buffer *rxb)
 696 {
 697         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 698         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 699         unsigned long status = priv->status;
 700         unsigned long reg_flags;
 701
 702         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 703                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 704                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 705
 706         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 707                      RF_CARD_DISABLED)) {
 708
 709                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 710                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 711
 712                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 713                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 714
 715                 if (!(flags & RXON_CARD_DISABLED)) {
 716                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 717                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 718                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 719                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 720
 721                 }
 722
 723                 if (flags & RF_CARD_DISABLED) {
 724                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 725                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 726                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 727                         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 728                         if (!iwl_grab_nic_access(priv))
 729                                 iwl_release_nic_access(priv);
 730                         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 731                 }
 732         }
 733
 734         if (flags & HW_CARD_DISABLED)
 735                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 736         else
 737                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 738
 739
 740         if (!(flags & RXON_CARD_DISABLED))
 741                 iwl_scan_cancel(priv);
 742
 743         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 744              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 745                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 746                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 747         else
 748                 wake_up_interruptible(&priv->wait_command_queue);
 749 }
 750
 751 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 752 {
 753         if (src == IWL_PWR_SRC_VAUX) {
 754                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 755                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 756                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 757                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 758         } else {
 759                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 760                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 761                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 762         }
 763
 764         return 0;
 765 }
 766
 767 /**
 768  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 769  *
 770  * Setup the RX handlers for each of the reply types sent from the uCode
 771  * to the host.
 772  *
 773  * This function chains into the hardware specific files for them to setup
 774  * any hardware specific handlers as well.
 775  */
 776 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 777 {
 778         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 779         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 780         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 781         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 782         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 783             iwl_rx_pm_debug_statistics_notif;
 784         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 785
 786         /*
 787          * The same handler is used for both the REPLY to a discrete
 788          * statistics request from the host as well as for the periodic
 789          * statistics notifications (after received beacons) from the uCode.
 790          */
 791         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 792         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 793
 794         iwl_setup_spectrum_handlers(priv);
 795         iwl_setup_rx_scan_handlers(priv);
 796
 797         /* status change handler */
 798         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 799
 800         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 801             iwl_rx_missed_beacon_notif;
 802         /* Rx handlers */
 803         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 804         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 805         /* block ack */
 806         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 807         /* Set up hardware specific Rx handlers */
 808         priv->cfg->ops->lib->rx_handler_setup(priv);
 809 }
 810
 811 /**
 812  * iwl_rx_handle - Main entry function for receiving responses from uCode
 813  *
 814  * Uses the priv->rx_handlers callback function array to invoke
 815  * the appropriate handlers, including command responses,
 816  * frame-received notifications, and other notifications.
 817  */
 818 void iwl_rx_handle(struct iwl_priv *priv)
 819 {
 820         struct iwl_rx_mem_buffer *rxb;
 821         struct iwl_rx_packet *pkt;
 822         struct iwl_rx_queue *rxq = &priv->rxq;
 823         u32 r, i;
 824         int reclaim;
 825         unsigned long flags;
 826         u8 fill_rx = 0;
 827         u32 count = 8;
 828         int total_empty;
 829
 830         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 831          * buffer that the driver may process (last buffer filled by ucode). */
 832         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 833         i = rxq->read;
 834
 835         /* Rx interrupt, but nothing sent from uCode */
 836         if (i == r)
 837                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 838
 839         /* calculate total frames need to be restock after handling RX */
 840         total_empty = r - priv->rxq.write_actual;
 841         if (total_empty < 0)
 842                 total_empty += RX_QUEUE_SIZE;
 843
 844         if (total_empty > (RX_QUEUE_SIZE / 2))
 845                 fill_rx = 1;
 846
 847         while (i != r) {
 848                 rxb = rxq->queue[i];
 849
 850                 /* If an RXB doesn't have a Rx queue slot associated with it,
 851                  * then a bug has been introduced in the queue refilling
 852                  * routines -- catch it here */
 853                 BUG_ON(rxb == NULL);
 854
 855                 rxq->queue[i] = NULL;
 856
 857                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
 858                                  priv->hw_params.rx_buf_size + 256,
 859                                  PCI_DMA_FROMDEVICE);
 860                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 861
 862                 /* Reclaim a command buffer only if this packet is a response
 863                  *   to a (driver-originated) command.
 864                  * If the packet (e.g. Rx frame) originated from uCode,
 865                  *   there is no command buffer to reclaim.
 866                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 867                  *   but apparently a few don't get set; catch them here. */
 868                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 869                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 870                         (pkt->hdr.cmd != REPLY_RX) &&
 871                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 872                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 873                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 874                         (pkt->hdr.cmd != REPLY_TX);
 875
 876                 /* Based on type of command response or notification,
 877                  *   handle those that need handling via function in
 878                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 879                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 880                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 881                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 882                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 883                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 884                 } else {
 885                         /* No handling needed */
 886                         IWL_DEBUG_RX(priv,
 887                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 888                                 r, i, get_cmd_string(pkt->hdr.cmd),
 889                                 pkt->hdr.cmd);
 890                 }
 891
 892                 if (reclaim) {
 893                         /* Invoke any callbacks, transfer the skb to caller, and
 894                          * fire off the (possibly) blocking iwl_send_cmd()
 895                          * as we reclaim the driver command queue */
 896                         if (rxb && rxb->skb)
 897                                 iwl_tx_cmd_complete(priv, rxb);
 898                         else
 899                                 IWL_WARN(priv, "Claim null rxb?\n");
 900                 }
 901
 902                 /* For now we just don't re-use anything.  We can tweak this
 903                  * later to try and re-use notification packets and SKBs that
 904                  * fail to Rx correctly */
 905                 if (rxb->skb != NULL) {
 906                         priv->alloc_rxb_skb--;
 907                         dev_kfree_skb_any(rxb->skb);
 908                         rxb->skb = NULL;
 909                 }
 910
 911                 spin_lock_irqsave(&rxq->lock, flags);
 912                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
 913                 spin_unlock_irqrestore(&rxq->lock, flags);
 914                 i = (i + 1) & RX_QUEUE_MASK;
 915                 /* If there are a lot of unused frames,
 916                  * restock the Rx queue so ucode wont assert. */
 917                 if (fill_rx) {
 918                         count++;
 919                         if (count >= 8) {
 920                                 priv->rxq.read = i;
 921                                 iwl_rx_replenish_now(priv);
 922                                 count = 0;
 923                         }
 924                 }
 925         }
 926
 927         /* Backtrack one entry */
 928         priv->rxq.read = i;
 929         if (fill_rx)
 930                 iwl_rx_replenish_now(priv);
 931         else
 932                 iwl_rx_queue_restock(priv);
 933 }
 934
 935 /* call this function to flush any scheduled tasklet */
 936 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 937 {
 938         /* wait to make sure we flush pending tasklet*/
 939         synchronize_irq(priv->pci_dev->irq);
 940         tasklet_kill(&priv->irq_tasklet);
 941 }
 942
 943 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
 944 {
 945         u32 inta, handled = 0;
 946         u32 inta_fh;
 947         unsigned long flags;
 948 #ifdef CONFIG_IWLWIFI_DEBUG
 949         u32 inta_mask;
 950 #endif
 951
 952         spin_lock_irqsave(&priv->lock, flags);
 953
 954         /* Ack/clear/reset pending uCode interrupts.
 955          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 956          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
 957         inta = iwl_read32(priv, CSR_INT);
 958         iwl_write32(priv, CSR_INT, inta);
 959
 960         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
 961          * Any new interrupts that happen after this, either while we're
 962          * in this tasklet, or later, will show up in next ISR/tasklet. */
 963         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
 964         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
 965
 966 #ifdef CONFIG_IWLWIFI_DEBUG
 967         if (priv->debug_level & IWL_DL_ISR) {
 968                 /* just for debug */
 969                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 970                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
 971                               inta, inta_mask, inta_fh);
 972         }
 973 #endif
 974
 975         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
 976          * atomic, make sure that inta covers all the interrupts that
 977          * we've discovered, even if FH interrupt came in just after
 978          * reading CSR_INT. */
 979         if (inta_fh & CSR49_FH_INT_RX_MASK)
 980                 inta |= CSR_INT_BIT_FH_RX;
 981         if (inta_fh & CSR49_FH_INT_TX_MASK)
 982                 inta |= CSR_INT_BIT_FH_TX;
 983
 984         /* Now service all interrupt bits discovered above. */
 985         if (inta & CSR_INT_BIT_HW_ERR) {
 986                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
 987
 988                 /* Tell the device to stop sending interrupts */
 989                 iwl_disable_interrupts(priv);
 990
 991                 priv->isr_stats.hw++;
 992                 iwl_irq_handle_error(priv);
 993
 994                 handled |= CSR_INT_BIT_HW_ERR;
 995
 996                 spin_unlock_irqrestore(&priv->lock, flags);
 997
 998                 return;
 999         }
1000
1001 #ifdef CONFIG_IWLWIFI_DEBUG
1002         if (priv->debug_level & (IWL_DL_ISR)) {
1003                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1004                 if (inta & CSR_INT_BIT_SCD) {
1005                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1006                                       "the frame/frames.\n");
1007                         priv->isr_stats.sch++;
1008                 }
1009
1010                 /* Alive notification via Rx interrupt will do the real work */
1011                 if (inta & CSR_INT_BIT_ALIVE) {
1012                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1013                         priv->isr_stats.alive++;
1014                 }
1015         }
1016 #endif
1017         /* Safely ignore these bits for debug checks below */
1018         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1019
1020         /* HW RF KILL switch toggled */
1021         if (inta & CSR_INT_BIT_RF_KILL) {
1022                 int hw_rf_kill = 0;
1023                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1024                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1025                         hw_rf_kill = 1;
1026
1027                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1028                                 hw_rf_kill ? "disable radio" : "enable radio");
1029
1030                 priv->isr_stats.rfkill++;
1031
1032                 /* driver only loads ucode once setting the interface up.
1033                  * the driver allows loading the ucode even if the radio
1034                  * is killed. Hence update the killswitch state here. The
1035                  * rfkill handler will care about restarting if needed.
1036                  */
1037                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1038                         if (hw_rf_kill)
1039                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1040                         else
1041                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1042                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1043                 }
1044
1045                 handled |= CSR_INT_BIT_RF_KILL;
1046         }
1047
1048         /* Chip got too hot and stopped itself */
1049         if (inta & CSR_INT_BIT_CT_KILL) {
1050                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1051                 priv->isr_stats.ctkill++;
1052                 handled |= CSR_INT_BIT_CT_KILL;
1053         }
1054
1055         /* Error detected by uCode */
1056         if (inta & CSR_INT_BIT_SW_ERR) {
1057                 IWL_ERR(priv, "Microcode SW error detected. "
1058                         " Restarting 0x%X.\n", inta);
1059                 priv->isr_stats.sw++;
1060                 priv->isr_stats.sw_err = inta;
1061                 iwl_irq_handle_error(priv);
1062                 handled |= CSR_INT_BIT_SW_ERR;
1063         }
1064
1065         /* uCode wakes up after power-down sleep */
1066         if (inta & CSR_INT_BIT_WAKEUP) {
1067                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1068                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1069                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1070                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1071                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1072                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1073                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1074                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1075
1076                 priv->isr_stats.wakeup++;
1077
1078                 handled |= CSR_INT_BIT_WAKEUP;
1079         }
1080
1081         /* All uCode command responses, including Tx command responses,
1082          * Rx "responses" (frame-received notification), and other
1083          * notifications from uCode come through here*/
1084         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1085                 iwl_rx_handle(priv);
1086                 priv->isr_stats.rx++;
1087                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1088         }
1089
1090         if (inta & CSR_INT_BIT_FH_TX) {
1091                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1092                 priv->isr_stats.tx++;
1093                 handled |= CSR_INT_BIT_FH_TX;
1094                 /* FH finished to write, send event */
1095                 priv->ucode_write_complete = 1;
1096                 wake_up_interruptible(&priv->wait_command_queue);
1097         }
1098
1099         if (inta & ~handled) {
1100                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1101                 priv->isr_stats.unhandled++;
1102         }
1103
1104         if (inta & ~(priv->inta_mask)) {
1105                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1106                          inta & ~priv->inta_mask);
1107                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1108         }
1109
1110         /* Re-enable all interrupts */
1111         /* only Re-enable if diabled by irq */
1112         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1113                 iwl_enable_interrupts(priv);
1114
1115 #ifdef CONFIG_IWLWIFI_DEBUG
1116         if (priv->debug_level & (IWL_DL_ISR)) {
1117                 inta = iwl_read32(priv, CSR_INT);
1118                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1119                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1120                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1121                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1122         }
1123 #endif
1124         spin_unlock_irqrestore(&priv->lock, flags);
1125 }
1126
1127 /* tasklet for iwlagn interrupt */
1128 static void iwl_irq_tasklet(struct iwl_priv *priv)
1129 {
1130         u32 inta = 0;
1131         u32 handled = 0;
1132         unsigned long flags;
1133 #ifdef CONFIG_IWLWIFI_DEBUG
1134         u32 inta_mask;
1135 #endif
1136
1137         spin_lock_irqsave(&priv->lock, flags);
1138
1139         /* Ack/clear/reset pending uCode interrupts.
1140          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1141          */
1142         iwl_write32(priv, CSR_INT, priv->inta);
1143
1144         inta = priv->inta;
1145
1146 #ifdef CONFIG_IWLWIFI_DEBUG
1147         if (priv->debug_level & IWL_DL_ISR) {
1148                 /* just for debug */
1149                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1150                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1151                                 inta, inta_mask);
1152         }
1153 #endif
1154         /* saved interrupt in inta variable now we can reset priv->inta */
1155         priv->inta = 0;
1156
1157         /* Now service all interrupt bits discovered above. */
1158         if (inta & CSR_INT_BIT_HW_ERR) {
1159                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1160
1161                 /* Tell the device to stop sending interrupts */
1162                 iwl_disable_interrupts(priv);
1163
1164                 priv->isr_stats.hw++;
1165                 iwl_irq_handle_error(priv);
1166
1167                 handled |= CSR_INT_BIT_HW_ERR;
1168
1169                 spin_unlock_irqrestore(&priv->lock, flags);
1170
1171                 return;
1172         }
1173
1174 #ifdef CONFIG_IWLWIFI_DEBUG
1175         if (priv->debug_level & (IWL_DL_ISR)) {
1176                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1177                 if (inta & CSR_INT_BIT_SCD) {
1178                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1179                                       "the frame/frames.\n");
1180                         priv->isr_stats.sch++;
1181                 }
1182
1183                 /* Alive notification via Rx interrupt will do the real work */
1184                 if (inta & CSR_INT_BIT_ALIVE) {
1185                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1186                         priv->isr_stats.alive++;
1187                 }
1188         }
1189 #endif
1190         /* Safely ignore these bits for debug checks below */
1191         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1192
1193         /* HW RF KILL switch toggled */
1194         if (inta & CSR_INT_BIT_RF_KILL) {
1195                 int hw_rf_kill = 0;
1196                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1197                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1198                         hw_rf_kill = 1;
1199
1200                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1201                                 hw_rf_kill ? "disable radio" : "enable radio");
1202
1203                 priv->isr_stats.rfkill++;
1204
1205                 /* driver only loads ucode once setting the interface up.
1206                  * the driver allows loading the ucode even if the radio
1207                  * is killed. Hence update the killswitch state here. The
1208                  * rfkill handler will care about restarting if needed.
1209                  */
1210                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1211                         if (hw_rf_kill)
1212                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1213                         else
1214                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1215                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1216                 }
1217
1218                 handled |= CSR_INT_BIT_RF_KILL;
1219         }
1220
1221         /* Chip got too hot and stopped itself */
1222         if (inta & CSR_INT_BIT_CT_KILL) {
1223                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1224                 priv->isr_stats.ctkill++;
1225                 handled |= CSR_INT_BIT_CT_KILL;
1226         }
1227
1228         /* Error detected by uCode */
1229         if (inta & CSR_INT_BIT_SW_ERR) {
1230                 IWL_ERR(priv, "Microcode SW error detected. "
1231                         " Restarting 0x%X.\n", inta);
1232                 priv->isr_stats.sw++;
1233                 priv->isr_stats.sw_err = inta;
1234                 iwl_irq_handle_error(priv);
1235                 handled |= CSR_INT_BIT_SW_ERR;
1236         }
1237
1238         /* uCode wakes up after power-down sleep */
1239         if (inta & CSR_INT_BIT_WAKEUP) {
1240                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1241                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1242                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1243                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1244                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1245                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1246                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1247                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1248
1249                 priv->isr_stats.wakeup++;
1250
1251                 handled |= CSR_INT_BIT_WAKEUP;
1252         }
1253
1254         /* All uCode command responses, including Tx command responses,
1255          * Rx "responses" (frame-received notification), and other
1256          * notifications from uCode come through here*/
1257         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1258                         CSR_INT_BIT_RX_PERIODIC)) {
1259                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1260                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1261                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1262                         iwl_write32(priv, CSR_FH_INT_STATUS,
1263                                         CSR49_FH_INT_RX_MASK);
1264                 }
1265                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1266                         handled |= CSR_INT_BIT_RX_PERIODIC;
1267                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1268                 }
1269                 /* Sending RX interrupt require many steps to be done in the
1270                  * the device:
1271                  * 1- write interrupt to current index in ICT table.
1272                  * 2- dma RX frame.
1273                  * 3- update RX shared data to indicate last write index.
1274                  * 4- send interrupt.
1275                  * This could lead to RX race, driver could receive RX interrupt
1276                  * but the shared data changes does not reflect this.
1277                  * this could lead to RX race, RX periodic will solve this race
1278                  */
1279                 iwl_write32(priv, CSR_INT_PERIODIC_REG,
1280                             CSR_INT_PERIODIC_DIS);
1281                 iwl_rx_handle(priv);
1282                 /* Only set RX periodic if real RX is received. */
1283                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1284                         iwl_write32(priv, CSR_INT_PERIODIC_REG,
1285                                     CSR_INT_PERIODIC_ENA);
1286
1287                 priv->isr_stats.rx++;
1288         }
1289
1290         if (inta & CSR_INT_BIT_FH_TX) {
1291                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1292                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1293                 priv->isr_stats.tx++;
1294                 handled |= CSR_INT_BIT_FH_TX;
1295                 /* FH finished to write, send event */
1296                 priv->ucode_write_complete = 1;
1297                 wake_up_interruptible(&priv->wait_command_queue);
1298         }
1299
1300         if (inta & ~handled) {
1301                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1302                 priv->isr_stats.unhandled++;
1303         }
1304
1305         if (inta & ~(priv->inta_mask)) {
1306                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1307                          inta & ~priv->inta_mask);
1308         }
1309
1310
1311         /* Re-enable all interrupts */
1312         /* only Re-enable if diabled by irq */
1313         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1314                 iwl_enable_interrupts(priv);
1315
1316         spin_unlock_irqrestore(&priv->lock, flags);
1317
1318 }
1319
1320
1321 /******************************************************************************
1322  *
1323  * uCode download functions
1324  *
1325  ******************************************************************************/
1326
1327 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1328 {
1329         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1330         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1331         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1332         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1333         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1334         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1335 }
1336
1337 static void iwl_nic_start(struct iwl_priv *priv)
1338 {
1339         /* Remove all resets to allow NIC to operate */
1340         iwl_write32(priv, CSR_RESET, 0);
1341 }
1342
1343
1344 /**
1345  * iwl_read_ucode - Read uCode images from disk file.
1346  *
1347  * Copy into buffers for card to fetch via bus-mastering
1348  */
1349 static int iwl_read_ucode(struct iwl_priv *priv)
1350 {
1351         struct iwl_ucode *ucode;
1352         int ret = -EINVAL, index;
1353         const struct firmware *ucode_raw;
1354         const char *name_pre = priv->cfg->fw_name_pre;
1355         const unsigned int api_max = priv->cfg->ucode_api_max;
1356         const unsigned int api_min = priv->cfg->ucode_api_min;
1357         char buf[25];
1358         u8 *src;
1359         size_t len;
1360         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1361
1362         /* Ask kernel firmware_class module to get the boot firmware off disk.
1363          * request_firmware() is synchronous, file is in memory on return. */
1364         for (index = api_max; index >= api_min; index--) {
1365                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1366                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1367                 if (ret < 0) {
1368                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1369                                   buf, ret);
1370                         if (ret == -ENOENT)
1371                                 continue;
1372                         else
1373                                 goto error;
1374                 } else {
1375                         if (index < api_max)
1376                                 IWL_ERR(priv, "Loaded firmware %s, "
1377                                         "which is deprecated. "
1378                                         "Please use API v%u instead.\n",
1379                                           buf, api_max);
1380
1381                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1382                                        buf, ucode_raw->size);
1383                         break;
1384                 }
1385         }
1386
1387         if (ret < 0)
1388                 goto error;
1389
1390         /* Make sure that we got at least our header! */
1391         if (ucode_raw->size < sizeof(*ucode)) {
1392                 IWL_ERR(priv, "File size way too small!\n");
1393                 ret = -EINVAL;
1394                 goto err_release;
1395         }
1396
1397         /* Data from ucode file:  header followed by uCode images */
1398         ucode = (void *)ucode_raw->data;
1399
1400         priv->ucode_ver = le32_to_cpu(ucode->ver);
1401         api_ver = IWL_UCODE_API(priv->ucode_ver);
1402         inst_size = le32_to_cpu(ucode->inst_size);
1403         data_size = le32_to_cpu(ucode->data_size);
1404         init_size = le32_to_cpu(ucode->init_size);
1405         init_data_size = le32_to_cpu(ucode->init_data_size);
1406         boot_size = le32_to_cpu(ucode->boot_size);
1407
1408         /* api_ver should match the api version forming part of the
1409          * firmware filename ... but we don't check for that and only rely
1410          * on the API version read from firmware header from here on forward */
1411
1412         if (api_ver < api_min || api_ver > api_max) {
1413                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1414                           "Driver supports v%u, firmware is v%u.\n",
1415                           api_max, api_ver);
1416                 priv->ucode_ver = 0;
1417                 ret = -EINVAL;
1418                 goto err_release;
1419         }
1420         if (api_ver != api_max)
1421                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1422                           "got v%u. New firmware can be obtained "
1423                           "from http://www.intellinuxwireless.org.\n",
1424                           api_max, api_ver);
1425
1426         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1427                IWL_UCODE_MAJOR(priv->ucode_ver),
1428                IWL_UCODE_MINOR(priv->ucode_ver),
1429                IWL_UCODE_API(priv->ucode_ver),
1430                IWL_UCODE_SERIAL(priv->ucode_ver));
1431
1432         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1433                        priv->ucode_ver);
1434         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1435                        inst_size);
1436         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1437                        data_size);
1438         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1439                        init_size);
1440         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1441                        init_data_size);
1442         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1443                        boot_size);
1444
1445         /* Verify size of file vs. image size info in file's header */
1446         if (ucode_raw->size < sizeof(*ucode) +
1447                 inst_size + data_size + init_size +
1448                 init_data_size + boot_size) {
1449
1450                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1451                                (int)ucode_raw->size);
1452                 ret = -EINVAL;
1453                 goto err_release;
1454         }
1455
1456         /* Verify that uCode images will fit in card's SRAM */
1457         if (inst_size > priv->hw_params.max_inst_size) {
1458                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1459                                inst_size);
1460                 ret = -EINVAL;
1461                 goto err_release;
1462         }
1463
1464         if (data_size > priv->hw_params.max_data_size) {
1465                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1466                                 data_size);
1467                 ret = -EINVAL;
1468                 goto err_release;
1469         }
1470         if (init_size > priv->hw_params.max_inst_size) {
1471                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1472                         init_size);
1473                 ret = -EINVAL;
1474                 goto err_release;
1475         }
1476         if (init_data_size > priv->hw_params.max_data_size) {
1477                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1478                       init_data_size);
1479                 ret = -EINVAL;
1480                 goto err_release;
1481         }
1482         if (boot_size > priv->hw_params.max_bsm_size) {
1483                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1484                         boot_size);
1485                 ret = -EINVAL;
1486                 goto err_release;
1487         }
1488
1489         /* Allocate ucode buffers for card's bus-master loading ... */
1490
1491         /* Runtime instructions and 2 copies of data:
1492          * 1) unmodified from disk
1493          * 2) backup cache for save/restore during power-downs */
1494         priv->ucode_code.len = inst_size;
1495         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1496
1497         priv->ucode_data.len = data_size;
1498         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1499
1500         priv->ucode_data_backup.len = data_size;
1501         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1502
1503         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1504             !priv->ucode_data_backup.v_addr)
1505                 goto err_pci_alloc;
1506
1507         /* Initialization instructions and data */
1508         if (init_size && init_data_size) {
1509                 priv->ucode_init.len = init_size;
1510                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1511
1512                 priv->ucode_init_data.len = init_data_size;
1513                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1514
1515                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1516                         goto err_pci_alloc;
1517         }
1518
1519         /* Bootstrap (instructions only, no data) */
1520         if (boot_size) {
1521                 priv->ucode_boot.len = boot_size;
1522                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1523
1524                 if (!priv->ucode_boot.v_addr)
1525                         goto err_pci_alloc;
1526         }
1527
1528         /* Copy images into buffers for card's bus-master reads ... */
1529
1530         /* Runtime instructions (first block of data in file) */
1531         src = &ucode->data[0];
1532         len = priv->ucode_code.len;
1533         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1534         memcpy(priv->ucode_code.v_addr, src, len);
1535         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1536                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1537
1538         /* Runtime data (2nd block)
1539          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1540         src = &ucode->data[inst_size];
1541         len = priv->ucode_data.len;
1542         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1543         memcpy(priv->ucode_data.v_addr, src, len);
1544         memcpy(priv->ucode_data_backup.v_addr, src, len);
1545
1546         /* Initialization instructions (3rd block) */
1547         if (init_size) {
1548                 src = &ucode->data[inst_size + data_size];
1549                 len = priv->ucode_init.len;
1550                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1551                                 len);
1552                 memcpy(priv->ucode_init.v_addr, src, len);
1553         }
1554
1555         /* Initialization data (4th block) */
1556         if (init_data_size) {
1557                 src = &ucode->data[inst_size + data_size + init_size];
1558                 len = priv->ucode_init_data.len;
1559                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1560                                len);
1561                 memcpy(priv->ucode_init_data.v_addr, src, len);
1562         }
1563
1564         /* Bootstrap instructions (5th block) */
1565         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1566         len = priv->ucode_boot.len;
1567         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1568         memcpy(priv->ucode_boot.v_addr, src, len);
1569
1570         /* We have our copies now, allow OS release its copies */
1571         release_firmware(ucode_raw);
1572         return 0;
1573
1574  err_pci_alloc:
1575         IWL_ERR(priv, "failed to allocate pci memory\n");
1576         ret = -ENOMEM;
1577         iwl_dealloc_ucode_pci(priv);
1578
1579  err_release:
1580         release_firmware(ucode_raw);
1581
1582  error:
1583         return ret;
1584 }
1585
1586 /**
1587  * iwl_alive_start - called after REPLY_ALIVE notification received
1588  *                   from protocol/runtime uCode (initialization uCode's
1589  *                   Alive gets handled by iwl_init_alive_start()).
1590  */
1591 static void iwl_alive_start(struct iwl_priv *priv)
1592 {
1593         int ret = 0;
1594
1595         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1596
1597         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1598                 /* We had an error bringing up the hardware, so take it
1599                  * all the way back down so we can try again */
1600                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1601                 goto restart;
1602         }
1603
1604         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1605          * This is a paranoid check, because we would not have gotten the
1606          * "runtime" alive if code weren't properly loaded.  */
1607         if (iwl_verify_ucode(priv)) {
1608                 /* Runtime instruction load was bad;
1609                  * take it all the way back down so we can try again */
1610                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1611                 goto restart;
1612         }
1613
1614         iwl_clear_stations_table(priv);
1615         ret = priv->cfg->ops->lib->alive_notify(priv);
1616         if (ret) {
1617                 IWL_WARN(priv,
1618                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1619                 goto restart;
1620         }
1621
1622         /* After the ALIVE response, we can send host commands to the uCode */
1623         set_bit(STATUS_ALIVE, &priv->status);
1624
1625         if (iwl_is_rfkill(priv))
1626                 return;
1627
1628         ieee80211_wake_queues(priv->hw);
1629
1630         priv->active_rate = priv->rates_mask;
1631         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1632
1633         if (iwl_is_associated(priv)) {
1634                 struct iwl_rxon_cmd *active_rxon =
1635                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1636                 /* apply any changes in staging */
1637                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1638                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1639         } else {
1640                 /* Initialize our rx_config data */
1641                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1642
1643                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1644                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1645
1646                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1647         }
1648
1649         /* Configure Bluetooth device coexistence support */
1650         iwl_send_bt_config(priv);
1651
1652         iwl_reset_run_time_calib(priv);
1653
1654         /* Configure the adapter for unassociated operation */
1655         iwlcore_commit_rxon(priv);
1656
1657         /* At this point, the NIC is initialized and operational */
1658         iwl_rf_kill_ct_config(priv);
1659
1660         iwl_leds_register(priv);
1661
1662         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1663         set_bit(STATUS_READY, &priv->status);
1664         wake_up_interruptible(&priv->wait_command_queue);
1665
1666         iwl_power_update_mode(priv, 1);
1667
1668         /* reassociate for ADHOC mode */
1669         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1670                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1671                                                                 priv->vif);
1672                 if (beacon)
1673                         iwl_mac_beacon_update(priv->hw, beacon);
1674         }
1675
1676
1677         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1678                 iwl_set_mode(priv, priv->iw_mode);
1679
1680         return;
1681
1682  restart:
1683         queue_work(priv->workqueue, &priv->restart);
1684 }
1685
1686 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1687
1688 static void __iwl_down(struct iwl_priv *priv)
1689 {
1690         unsigned long flags;
1691         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1692
1693         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1694
1695         if (!exit_pending)
1696                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1697
1698         iwl_leds_unregister(priv);
1699
1700         iwl_clear_stations_table(priv);
1701
1702         /* Unblock any waiting calls */
1703         wake_up_interruptible_all(&priv->wait_command_queue);
1704
1705         /* Wipe out the EXIT_PENDING status bit if we are not actually
1706          * exiting the module */
1707         if (!exit_pending)
1708                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1709
1710         /* stop and reset the on-board processor */
1711         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1712
1713         /* tell the device to stop sending interrupts */
1714         spin_lock_irqsave(&priv->lock, flags);
1715         iwl_disable_interrupts(priv);
1716         spin_unlock_irqrestore(&priv->lock, flags);
1717         iwl_synchronize_irq(priv);
1718
1719         if (priv->mac80211_registered)
1720                 ieee80211_stop_queues(priv->hw);
1721
1722         /* If we have not previously called iwl_init() then
1723          * clear all bits but the RF Kill bit and return */
1724         if (!iwl_is_init(priv)) {
1725                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1726                                         STATUS_RF_KILL_HW |
1727                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1728                                         STATUS_GEO_CONFIGURED |
1729                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1730                                         STATUS_EXIT_PENDING;
1731                 goto exit;
1732         }
1733
1734         /* ...otherwise clear out all the status bits but the RF Kill
1735          * bit and continue taking the NIC down. */
1736         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1737                                 STATUS_RF_KILL_HW |
1738                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1739                                 STATUS_GEO_CONFIGURED |
1740                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1741                                 STATUS_FW_ERROR |
1742                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1743                                 STATUS_EXIT_PENDING;
1744
1745         /* device going down, Stop using ICT table */
1746         iwl_disable_ict(priv);
1747         spin_lock_irqsave(&priv->lock, flags);
1748         iwl_clear_bit(priv, CSR_GP_CNTRL,
1749                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1750         spin_unlock_irqrestore(&priv->lock, flags);
1751
1752         iwl_txq_ctx_stop(priv);
1753         iwl_rxq_stop(priv);
1754
1755         iwl_write_prph(priv, APMG_CLK_DIS_REG,
1756                                 APMG_CLK_VAL_DMA_CLK_RQT);
1757
1758         udelay(5);
1759
1760         /* FIXME: apm_ops.suspend(priv) */
1761         if (exit_pending)
1762                 priv->cfg->ops->lib->apm_ops.stop(priv);
1763         else
1764                 priv->cfg->ops->lib->apm_ops.reset(priv);
1765  exit:
1766         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1767
1768         if (priv->ibss_beacon)
1769                 dev_kfree_skb(priv->ibss_beacon);
1770         priv->ibss_beacon = NULL;
1771
1772         /* clear out any free frames */
1773         iwl_clear_free_frames(priv);
1774 }
1775
1776 static void iwl_down(struct iwl_priv *priv)
1777 {
1778         mutex_lock(&priv->mutex);
1779         __iwl_down(priv);
1780         mutex_unlock(&priv->mutex);
1781
1782         iwl_cancel_deferred_work(priv);
1783 }
1784
1785 #define HW_READY_TIMEOUT (50)
1786
1787 static int iwl_set_hw_ready(struct iwl_priv *priv)
1788 {
1789         int ret = 0;
1790
1791         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1792                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
1793
1794         /* See if we got it */
1795         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1796                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1797                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1798                                 HW_READY_TIMEOUT);
1799         if (ret != -ETIMEDOUT)
1800                 priv->hw_ready = true;
1801         else
1802                 priv->hw_ready = false;
1803
1804         IWL_DEBUG_INFO(priv, "hardware %s\n",
1805                       (priv->hw_ready == 1) ? "ready" : "not ready");
1806         return ret;
1807 }
1808
1809 static int iwl_prepare_card_hw(struct iwl_priv *priv)
1810 {
1811         int ret = 0;
1812
1813         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
1814
1815         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1816                         CSR_HW_IF_CONFIG_REG_PREPARE);
1817
1818         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1819                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
1820                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
1821
1822         if (ret != -ETIMEDOUT)
1823                 iwl_set_hw_ready(priv);
1824
1825         return ret;
1826 }
1827
1828 #define MAX_HW_RESTARTS 5
1829
1830 static int __iwl_up(struct iwl_priv *priv)
1831 {
1832         int i;
1833         int ret;
1834
1835         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1836                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1837                 return -EIO;
1838         }
1839
1840         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1841                 IWL_ERR(priv, "ucode not available for device bringup\n");
1842                 return -EIO;
1843         }
1844
1845         iwl_prepare_card_hw(priv);
1846
1847         if (!priv->hw_ready) {
1848                 IWL_WARN(priv, "Exit HW not ready\n");
1849                 return -EIO;
1850         }
1851
1852         /* If platform's RF_KILL switch is NOT set to KILL */
1853         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1854                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1855         else
1856                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1857
1858         if (iwl_is_rfkill(priv)) {
1859                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
1860
1861                 iwl_enable_interrupts(priv);
1862                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
1863                 return 0;
1864         }
1865
1866         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1867
1868         ret = iwl_hw_nic_init(priv);
1869         if (ret) {
1870                 IWL_ERR(priv, "Unable to init nic\n");
1871                 return ret;
1872         }
1873
1874         /* make sure rfkill handshake bits are cleared */
1875         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1876         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1877                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1878
1879         /* clear (again), then enable host interrupts */
1880         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1881         iwl_enable_interrupts(priv);
1882
1883         /* really make sure rfkill handshake bits are cleared */
1884         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1885         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1886
1887         /* Copy original ucode data image from disk into backup cache.
1888          * This will be used to initialize the on-board processor's
1889          * data SRAM for a clean start when the runtime program first loads. */
1890         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1891                priv->ucode_data.len);
1892
1893         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1894
1895                 iwl_clear_stations_table(priv);
1896
1897                 /* load bootstrap state machine,
1898                  * load bootstrap program into processor's memory,
1899                  * prepare to load the "initialize" uCode */
1900                 ret = priv->cfg->ops->lib->load_ucode(priv);
1901
1902                 if (ret) {
1903                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1904                                 ret);
1905                         continue;
1906                 }
1907
1908                 /* start card; "initialize" will load runtime ucode */
1909                 iwl_nic_start(priv);
1910
1911                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1912
1913                 return 0;
1914         }
1915
1916         set_bit(STATUS_EXIT_PENDING, &priv->status);
1917         __iwl_down(priv);
1918         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1919
1920         /* tried to restart and config the device for as long as our
1921          * patience could withstand */
1922         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1923         return -EIO;
1924 }
1925
1926
1927 /*****************************************************************************
1928  *
1929  * Workqueue callbacks
1930  *
1931  *****************************************************************************/
1932
1933 static void iwl_bg_init_alive_start(struct work_struct *data)
1934 {
1935         struct iwl_priv *priv =
1936             container_of(data, struct iwl_priv, init_alive_start.work);
1937
1938         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1939                 return;
1940
1941         mutex_lock(&priv->mutex);
1942         priv->cfg->ops->lib->init_alive_start(priv);
1943         mutex_unlock(&priv->mutex);
1944 }
1945
1946 static void iwl_bg_alive_start(struct work_struct *data)
1947 {
1948         struct iwl_priv *priv =
1949             container_of(data, struct iwl_priv, alive_start.work);
1950
1951         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1952                 return;
1953
1954         /* enable dram interrupt */
1955         iwl_reset_ict(priv);
1956
1957         mutex_lock(&priv->mutex);
1958         iwl_alive_start(priv);
1959         mutex_unlock(&priv->mutex);
1960 }
1961
1962 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1963 {
1964         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1965                         run_time_calib_work);
1966
1967         mutex_lock(&priv->mutex);
1968
1969         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1970             test_bit(STATUS_SCANNING, &priv->status)) {
1971                 mutex_unlock(&priv->mutex);
1972                 return;
1973         }
1974
1975         if (priv->start_calib) {
1976                 iwl_chain_noise_calibration(priv, &priv->statistics);
1977
1978                 iwl_sensitivity_calibration(priv, &priv->statistics);
1979         }
1980
1981         mutex_unlock(&priv->mutex);
1982         return;
1983 }
1984
1985 static void iwl_bg_up(struct work_struct *data)
1986 {
1987         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1988
1989         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1990                 return;
1991
1992         mutex_lock(&priv->mutex);
1993         __iwl_up(priv);
1994         mutex_unlock(&priv->mutex);
1995 }
1996
1997 static void iwl_bg_restart(struct work_struct *data)
1998 {
1999         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2000
2001         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2002                 return;
2003
2004         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2005                 mutex_lock(&priv->mutex);
2006                 priv->vif = NULL;
2007                 priv->is_open = 0;
2008                 mutex_unlock(&priv->mutex);
2009                 iwl_down(priv);
2010                 ieee80211_restart_hw(priv->hw);
2011         } else {
2012                 iwl_down(priv);
2013                 queue_work(priv->workqueue, &priv->up);
2014         }
2015 }
2016
2017 static void iwl_bg_rx_replenish(struct work_struct *data)
2018 {
2019         struct iwl_priv *priv =
2020             container_of(data, struct iwl_priv, rx_replenish);
2021
2022         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2023                 return;
2024
2025         mutex_lock(&priv->mutex);
2026         iwl_rx_replenish(priv);
2027         mutex_unlock(&priv->mutex);
2028 }
2029
2030 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2031
2032 void iwl_post_associate(struct iwl_priv *priv)
2033 {
2034         struct ieee80211_conf *conf = NULL;
2035         int ret = 0;
2036         unsigned long flags;
2037
2038         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2039                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2040                 return;
2041         }
2042
2043         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2044                         priv->assoc_id, priv->active_rxon.bssid_addr);
2045
2046
2047         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2048                 return;
2049
2050
2051         if (!priv->vif || !priv->is_open)
2052                 return;
2053
2054         iwl_scan_cancel_timeout(priv, 200);
2055
2056         conf = ieee80211_get_hw_conf(priv->hw);
2057
2058         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2059         iwlcore_commit_rxon(priv);
2060
2061         iwl_setup_rxon_timing(priv);
2062         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2063                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2064         if (ret)
2065                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2066                             "Attempting to continue.\n");
2067
2068         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2069
2070         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2071
2072         if (priv->cfg->ops->hcmd->set_rxon_chain)
2073                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2074
2075         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2076
2077         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2078                         priv->assoc_id, priv->beacon_int);
2079
2080         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2081                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2082         else
2083                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2084
2085         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2086                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2087                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2088                 else
2089                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2090
2091                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2092                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2093
2094         }
2095
2096         iwlcore_commit_rxon(priv);
2097
2098         switch (priv->iw_mode) {
2099         case NL80211_IFTYPE_STATION:
2100                 break;
2101
2102         case NL80211_IFTYPE_ADHOC:
2103
2104                 /* assume default assoc id */
2105                 priv->assoc_id = 1;
2106
2107                 iwl_rxon_add_station(priv, priv->bssid, 0);
2108                 iwl_send_beacon_cmd(priv);
2109
2110                 break;
2111
2112         default:
2113                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2114                           __func__, priv->iw_mode);
2115                 break;
2116         }
2117
2118         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2119                 priv->assoc_station_added = 1;
2120
2121         spin_lock_irqsave(&priv->lock, flags);
2122         iwl_activate_qos(priv, 0);
2123         spin_unlock_irqrestore(&priv->lock, flags);
2124
2125         /* the chain noise calibration will enabled PM upon completion
2126          * If chain noise has already been run, then we need to enable
2127          * power management here */
2128         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2129                 iwl_power_update_mode(priv, 0);
2130
2131         /* Enable Rx differential gain and sensitivity calibrations */
2132         iwl_chain_noise_reset(priv);
2133         priv->start_calib = 1;
2134
2135 }
2136
2137 /*****************************************************************************
2138  *
2139  * mac80211 entry point functions
2140  *
2141  *****************************************************************************/
2142
2143 #define UCODE_READY_TIMEOUT     (4 * HZ)
2144
2145 static int iwl_mac_start(struct ieee80211_hw *hw)
2146 {
2147         struct iwl_priv *priv = hw->priv;
2148         int ret;
2149
2150         IWL_DEBUG_MAC80211(priv, "enter\n");
2151
2152         /* we should be verifying the device is ready to be opened */
2153         mutex_lock(&priv->mutex);
2154
2155         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2156         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2157          * ucode filename and max sizes are card-specific. */
2158
2159         if (!priv->ucode_code.len) {
2160                 ret = iwl_read_ucode(priv);
2161                 if (ret) {
2162                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2163                         mutex_unlock(&priv->mutex);
2164                         return ret;
2165                 }
2166         }
2167
2168         ret = __iwl_up(priv);
2169
2170         mutex_unlock(&priv->mutex);
2171
2172         if (ret)
2173                 return ret;
2174
2175         if (iwl_is_rfkill(priv))
2176                 goto out;
2177
2178         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2179
2180         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2181          * mac80211 will not be run successfully. */
2182         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2183                         test_bit(STATUS_READY, &priv->status),
2184                         UCODE_READY_TIMEOUT);
2185         if (!ret) {
2186                 if (!test_bit(STATUS_READY, &priv->status)) {
2187                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2188                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2189                         return -ETIMEDOUT;
2190                 }
2191         }
2192
2193 out:
2194         priv->is_open = 1;
2195         IWL_DEBUG_MAC80211(priv, "leave\n");
2196         return 0;
2197 }
2198
2199 static void iwl_mac_stop(struct ieee80211_hw *hw)
2200 {
2201         struct iwl_priv *priv = hw->priv;
2202
2203         IWL_DEBUG_MAC80211(priv, "enter\n");
2204
2205         if (!priv->is_open)
2206                 return;
2207
2208         priv->is_open = 0;
2209
2210         if (iwl_is_ready_rf(priv)) {
2211                 /* stop mac, cancel any scan request and clear
2212                  * RXON_FILTER_ASSOC_MSK BIT
2213                  */
2214                 mutex_lock(&priv->mutex);
2215                 iwl_scan_cancel_timeout(priv, 100);
2216                 mutex_unlock(&priv->mutex);
2217         }
2218
2219         iwl_down(priv);
2220
2221         flush_workqueue(priv->workqueue);
2222
2223         /* enable interrupts again in order to receive rfkill changes */
2224         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2225         iwl_enable_interrupts(priv);
2226
2227         IWL_DEBUG_MAC80211(priv, "leave\n");
2228 }
2229
2230 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2231 {
2232         struct iwl_priv *priv = hw->priv;
2233
2234         IWL_DEBUG_MACDUMP(priv, "enter\n");
2235
2236         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2237                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2238
2239         if (iwl_tx_skb(priv, skb))
2240                 dev_kfree_skb_any(skb);
2241
2242         IWL_DEBUG_MACDUMP(priv, "leave\n");
2243         return NETDEV_TX_OK;
2244 }
2245
2246 void iwl_config_ap(struct iwl_priv *priv)
2247 {
2248         int ret = 0;
2249         unsigned long flags;
2250
2251         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2252                 return;
2253
2254         /* The following should be done only at AP bring up */
2255         if (!iwl_is_associated(priv)) {
2256
2257                 /* RXON - unassoc (to set timing command) */
2258                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2259                 iwlcore_commit_rxon(priv);
2260
2261                 /* RXON Timing */
2262                 iwl_setup_rxon_timing(priv);
2263                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2264                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2265                 if (ret)
2266                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2267                                         "Attempting to continue.\n");
2268
2269                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2270                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2271
2272                 /* FIXME: what should be the assoc_id for AP? */
2273                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2274                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2275                         priv->staging_rxon.flags |=
2276                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2277                 else
2278                         priv->staging_rxon.flags &=
2279                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2280
2281                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2282                         if (priv->assoc_capability &
2283                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2284                                 priv->staging_rxon.flags |=
2285                                         RXON_FLG_SHORT_SLOT_MSK;
2286                         else
2287                                 priv->staging_rxon.flags &=
2288                                         ~RXON_FLG_SHORT_SLOT_MSK;
2289
2290                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2291                                 priv->staging_rxon.flags &=
2292                                         ~RXON_FLG_SHORT_SLOT_MSK;
2293                 }
2294                 /* restore RXON assoc */
2295                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2296                 iwlcore_commit_rxon(priv);
2297                 spin_lock_irqsave(&priv->lock, flags);
2298                 iwl_activate_qos(priv, 1);
2299                 spin_unlock_irqrestore(&priv->lock, flags);
2300                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2301         }
2302         iwl_send_beacon_cmd(priv);
2303
2304         /* FIXME - we need to add code here to detect a totally new
2305          * configuration, reset the AP, unassoc, rxon timing, assoc,
2306          * clear sta table, add BCAST sta... */
2307 }
2308
2309 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2310                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2311                         u32 iv32, u16 *phase1key)
2312 {
2313
2314         struct iwl_priv *priv = hw->priv;
2315         IWL_DEBUG_MAC80211(priv, "enter\n");
2316
2317         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2318
2319         IWL_DEBUG_MAC80211(priv, "leave\n");
2320 }
2321
2322 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2323                            struct ieee80211_vif *vif,
2324                            struct ieee80211_sta *sta,
2325                            struct ieee80211_key_conf *key)
2326 {
2327         struct iwl_priv *priv = hw->priv;
2328         const u8 *addr;
2329         int ret;
2330         u8 sta_id;
2331         bool is_default_wep_key = false;
2332
2333         IWL_DEBUG_MAC80211(priv, "enter\n");
2334
2335         if (priv->hw_params.sw_crypto) {
2336                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2337                 return -EOPNOTSUPP;
2338         }
2339         addr = sta ? sta->addr : iwl_bcast_addr;
2340         sta_id = iwl_find_station(priv, addr);
2341         if (sta_id == IWL_INVALID_STATION) {
2342                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2343                                    addr);
2344                 return -EINVAL;
2345
2346         }
2347
2348         mutex_lock(&priv->mutex);
2349         iwl_scan_cancel_timeout(priv, 100);
2350         mutex_unlock(&priv->mutex);
2351
2352         /* If we are getting WEP group key and we didn't receive any key mapping
2353          * so far, we are in legacy wep mode (group key only), otherwise we are
2354          * in 1X mode.
2355          * In legacy wep mode, we use another host command to the uCode */
2356         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2357                 priv->iw_mode != NL80211_IFTYPE_AP) {
2358                 if (cmd == SET_KEY)
2359                         is_default_wep_key = !priv->key_mapping_key;
2360                 else
2361                         is_default_wep_key =
2362                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2363         }
2364
2365         switch (cmd) {
2366         case SET_KEY:
2367                 if (is_default_wep_key)
2368                         ret = iwl_set_default_wep_key(priv, key);
2369                 else
2370                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2371
2372                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2373                 break;
2374         case DISABLE_KEY:
2375                 if (is_default_wep_key)
2376                         ret = iwl_remove_default_wep_key(priv, key);
2377                 else
2378                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2379
2380                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2381                 break;
2382         default:
2383                 ret = -EINVAL;
2384         }
2385
2386         IWL_DEBUG_MAC80211(priv, "leave\n");
2387
2388         return ret;
2389 }
2390
2391 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2392                              enum ieee80211_ampdu_mlme_action action,
2393                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2394 {
2395         struct iwl_priv *priv = hw->priv;
2396         int ret;
2397
2398         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2399                      sta->addr, tid);
2400
2401         if (!(priv->cfg->sku & IWL_SKU_N))
2402                 return -EACCES;
2403
2404         switch (action) {
2405         case IEEE80211_AMPDU_RX_START:
2406                 IWL_DEBUG_HT(priv, "start Rx\n");
2407                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2408         case IEEE80211_AMPDU_RX_STOP:
2409                 IWL_DEBUG_HT(priv, "stop Rx\n");
2410                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2411                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2412                         return 0;
2413                 else
2414                         return ret;
2415         case IEEE80211_AMPDU_TX_START:
2416                 IWL_DEBUG_HT(priv, "start Tx\n");
2417                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2418         case IEEE80211_AMPDU_TX_STOP:
2419                 IWL_DEBUG_HT(priv, "stop Tx\n");
2420                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2421                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2422                         return 0;
2423                 else
2424                         return ret;
2425         default:
2426                 IWL_DEBUG_HT(priv, "unknown\n");
2427                 return -EINVAL;
2428                 break;
2429         }
2430         return 0;
2431 }
2432
2433 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2434                              struct ieee80211_low_level_stats *stats)
2435 {
2436         struct iwl_priv *priv = hw->priv;
2437
2438         priv = hw->priv;
2439         IWL_DEBUG_MAC80211(priv, "enter\n");
2440         IWL_DEBUG_MAC80211(priv, "leave\n");
2441
2442         return 0;
2443 }
2444
2445 /*****************************************************************************
2446  *
2447  * sysfs attributes
2448  *
2449  *****************************************************************************/
2450
2451 #ifdef CONFIG_IWLWIFI_DEBUG
2452
2453 /*
2454  * The following adds a new attribute to the sysfs representation
2455  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2456  * used for controlling the debug level.
2457  *
2458  * See the level definitions in iwl for details.
2459  */
2460
2461 static ssize_t show_debug_level(struct device *d,
2462                                 struct device_attribute *attr, char *buf)
2463 {
2464         struct iwl_priv *priv = dev_get_drvdata(d);
2465
2466         return sprintf(buf, "0x%08X\n", priv->debug_level);
2467 }
2468 static ssize_t store_debug_level(struct device *d,
2469                                 struct device_attribute *attr,
2470                                  const char *buf, size_t count)
2471 {
2472         struct iwl_priv *priv = dev_get_drvdata(d);
2473         unsigned long val;
2474         int ret;
2475
2476         ret = strict_strtoul(buf, 0, &val);
2477         if (ret)
2478                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2479         else
2480                 priv->debug_level = val;
2481
2482         return strnlen(buf, count);
2483 }
2484
2485 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2486                         show_debug_level, store_debug_level);
2487
2488
2489 #endif /* CONFIG_IWLWIFI_DEBUG */
2490
2491
2492 static ssize_t show_version(struct device *d,
2493                                 struct device_attribute *attr, char *buf)
2494 {
2495         struct iwl_priv *priv = dev_get_drvdata(d);
2496         struct iwl_alive_resp *palive = &priv->card_alive;
2497         ssize_t pos = 0;
2498         u16 eeprom_ver;
2499
2500         if (palive->is_valid)
2501                 pos += sprintf(buf + pos,
2502                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2503                                 "fw type: 0x%01X 0x%01X\n",
2504                                 palive->ucode_major, palive->ucode_minor,
2505                                 palive->sw_rev[0], palive->sw_rev[1],
2506                                 palive->ver_type, palive->ver_subtype);
2507         else
2508                 pos += sprintf(buf + pos, "fw not loaded\n");
2509
2510         if (priv->eeprom) {
2511                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2512                 pos += sprintf(buf + pos, "NVM Type: %s, version: 0x%x\n",
2513                                (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
2514                                ? "OTP" : "EEPROM", eeprom_ver);
2515
2516         } else {
2517                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2518         }
2519
2520         return pos;
2521 }
2522
2523 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2524
2525 static ssize_t show_temperature(struct device *d,
2526                                 struct device_attribute *attr, char *buf)
2527 {
2528         struct iwl_priv *priv = dev_get_drvdata(d);
2529
2530         if (!iwl_is_alive(priv))
2531                 return -EAGAIN;
2532
2533         return sprintf(buf, "%d\n", priv->temperature);
2534 }
2535
2536 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2537
2538 static ssize_t show_tx_power(struct device *d,
2539                              struct device_attribute *attr, char *buf)
2540 {
2541         struct iwl_priv *priv = dev_get_drvdata(d);
2542
2543         if (!iwl_is_ready_rf(priv))
2544                 return sprintf(buf, "off\n");
2545         else
2546                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2547 }
2548
2549 static ssize_t store_tx_power(struct device *d,
2550                               struct device_attribute *attr,
2551                               const char *buf, size_t count)
2552 {
2553         struct iwl_priv *priv = dev_get_drvdata(d);
2554         unsigned long val;
2555         int ret;
2556
2557         ret = strict_strtoul(buf, 10, &val);
2558         if (ret)
2559                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2560         else
2561                 iwl_set_tx_power(priv, val, false);
2562
2563         return count;
2564 }
2565
2566 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2567
2568 static ssize_t show_flags(struct device *d,
2569                           struct device_attribute *attr, char *buf)
2570 {
2571         struct iwl_priv *priv = dev_get_drvdata(d);
2572
2573         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2574 }
2575
2576 static ssize_t store_flags(struct device *d,
2577                            struct device_attribute *attr,
2578                            const char *buf, size_t count)
2579 {
2580         struct iwl_priv *priv = dev_get_drvdata(d);
2581         unsigned long val;
2582         u32 flags;
2583         int ret = strict_strtoul(buf, 0, &val);
2584         if (ret)
2585                 return ret;
2586         flags = (u32)val;
2587
2588         mutex_lock(&priv->mutex);
2589         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2590                 /* Cancel any currently running scans... */
2591                 if (iwl_scan_cancel_timeout(priv, 100))
2592                         IWL_WARN(priv, "Could not cancel scan.\n");
2593                 else {
2594                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2595                         priv->staging_rxon.flags = cpu_to_le32(flags);
2596                         iwlcore_commit_rxon(priv);
2597                 }
2598         }
2599         mutex_unlock(&priv->mutex);
2600
2601         return count;
2602 }
2603
2604 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2605
2606 static ssize_t show_filter_flags(struct device *d,
2607                                  struct device_attribute *attr, char *buf)
2608 {
2609         struct iwl_priv *priv = dev_get_drvdata(d);
2610
2611         return sprintf(buf, "0x%04X\n",
2612                 le32_to_cpu(priv->active_rxon.filter_flags));
2613 }
2614
2615 static ssize_t store_filter_flags(struct device *d,
2616                                   struct device_attribute *attr,
2617                                   const char *buf, size_t count)
2618 {
2619         struct iwl_priv *priv = dev_get_drvdata(d);
2620         unsigned long val;
2621         u32 filter_flags;
2622         int ret = strict_strtoul(buf, 0, &val);
2623         if (ret)
2624                 return ret;
2625         filter_flags = (u32)val;
2626
2627         mutex_lock(&priv->mutex);
2628         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2629                 /* Cancel any currently running scans... */
2630                 if (iwl_scan_cancel_timeout(priv, 100))
2631                         IWL_WARN(priv, "Could not cancel scan.\n");
2632                 else {
2633                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2634                                        "0x%04X\n", filter_flags);
2635                         priv->staging_rxon.filter_flags =
2636                                 cpu_to_le32(filter_flags);
2637                         iwlcore_commit_rxon(priv);
2638                 }
2639         }
2640         mutex_unlock(&priv->mutex);
2641
2642         return count;
2643 }
2644
2645 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2646                    store_filter_flags);
2647
2648 static ssize_t store_power_level(struct device *d,
2649                                  struct device_attribute *attr,
2650                                  const char *buf, size_t count)
2651 {
2652         struct iwl_priv *priv = dev_get_drvdata(d);
2653         int ret;
2654         unsigned long mode;
2655
2656
2657         mutex_lock(&priv->mutex);
2658
2659         ret = strict_strtoul(buf, 10, &mode);
2660         if (ret)
2661                 goto out;
2662
2663         ret = iwl_power_set_user_mode(priv, mode);
2664         if (ret) {
2665                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
2666                 goto out;
2667         }
2668         ret = count;
2669
2670  out:
2671         mutex_unlock(&priv->mutex);
2672         return ret;
2673 }
2674
2675 static ssize_t show_power_level(struct device *d,
2676                                 struct device_attribute *attr, char *buf)
2677 {
2678         struct iwl_priv *priv = dev_get_drvdata(d);
2679         int mode = priv->power_data.user_power_setting;
2680         int level = priv->power_data.power_mode;
2681         char *p = buf;
2682
2683         p += sprintf(p, "INDEX:%d\t", level);
2684         p += sprintf(p, "USER:%d\n", mode);
2685         return p - buf + 1;
2686 }
2687
2688 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
2689                    store_power_level);
2690
2691 static ssize_t show_qos(struct device *d,
2692                                 struct device_attribute *attr, char *buf)
2693 {
2694         struct iwl_priv *priv = dev_get_drvdata(d);
2695         char *p = buf;
2696         int   q;
2697
2698         for (q = 0; q < AC_NUM; q++) {
2699                 p += sprintf(p, "\tcw_min\tcw_max\taifsn\ttxop\n");
2700                 p += sprintf(p, "AC[%d]\t%u\t%u\t%u\t%u\n", q,
2701                              priv->qos_data.def_qos_parm.ac[q].cw_min,
2702                              priv->qos_data.def_qos_parm.ac[q].cw_max,
2703                              priv->qos_data.def_qos_parm.ac[q].aifsn,
2704                              priv->qos_data.def_qos_parm.ac[q].edca_txop);
2705         }
2706
2707         return p - buf + 1;
2708 }
2709
2710 static DEVICE_ATTR(qos, S_IRUGO, show_qos, NULL);
2711
2712 static ssize_t show_statistics(struct device *d,
2713                                struct device_attribute *attr, char *buf)
2714 {
2715         struct iwl_priv *priv = dev_get_drvdata(d);
2716         u32 size = sizeof(struct iwl_notif_statistics);
2717         u32 len = 0, ofs = 0;
2718         u8 *data = (u8 *)&priv->statistics;
2719         int rc = 0;
2720
2721         if (!iwl_is_alive(priv))
2722                 return -EAGAIN;
2723
2724         mutex_lock(&priv->mutex);
2725         rc = iwl_send_statistics_request(priv, 0);
2726         mutex_unlock(&priv->mutex);
2727
2728         if (rc) {
2729                 len = sprintf(buf,
2730                               "Error sending statistics request: 0x%08X\n", rc);
2731                 return len;
2732         }
2733
2734         while (size && (PAGE_SIZE - len)) {
2735                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2736                                    PAGE_SIZE - len, 1);
2737                 len = strlen(buf);
2738                 if (PAGE_SIZE - len)
2739                         buf[len++] = '\n';
2740
2741                 ofs += 16;
2742                 size -= min(size, 16U);
2743         }
2744
2745         return len;
2746 }
2747
2748 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
2749
2750
2751 /*****************************************************************************
2752  *
2753  * driver setup and teardown
2754  *
2755  *****************************************************************************/
2756
2757 static void iwl_setup_deferred_work(struct iwl_priv *priv)
2758 {
2759         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
2760
2761         init_waitqueue_head(&priv->wait_command_queue);
2762
2763         INIT_WORK(&priv->up, iwl_bg_up);
2764         INIT_WORK(&priv->restart, iwl_bg_restart);
2765         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
2766         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
2767         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
2768         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
2769         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
2770
2771         iwl_setup_scan_deferred_work(priv);
2772
2773         if (priv->cfg->ops->lib->setup_deferred_work)
2774                 priv->cfg->ops->lib->setup_deferred_work(priv);
2775
2776         init_timer(&priv->statistics_periodic);
2777         priv->statistics_periodic.data = (unsigned long)priv;
2778         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
2779
2780         if (!priv->cfg->use_isr_legacy)
2781                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2782                         iwl_irq_tasklet, (unsigned long)priv);
2783         else
2784                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2785                         iwl_irq_tasklet_legacy, (unsigned long)priv);
2786 }
2787
2788 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
2789 {
2790         if (priv->cfg->ops->lib->cancel_deferred_work)
2791                 priv->cfg->ops->lib->cancel_deferred_work(priv);
2792
2793         cancel_delayed_work_sync(&priv->init_alive_start);
2794         cancel_delayed_work(&priv->scan_check);
2795         cancel_delayed_work(&priv->alive_start);
2796         cancel_work_sync(&priv->beacon_update);
2797         del_timer_sync(&priv->statistics_periodic);
2798 }
2799
2800 static struct attribute *iwl_sysfs_entries[] = {
2801         &dev_attr_flags.attr,
2802         &dev_attr_filter_flags.attr,
2803         &dev_attr_power_level.attr,
2804         &dev_attr_statistics.attr,
2805         &dev_attr_temperature.attr,
2806         &dev_attr_tx_power.attr,
2807 #ifdef CONFIG_IWLWIFI_DEBUG
2808         &dev_attr_debug_level.attr,
2809 #endif
2810         &dev_attr_version.attr,
2811         &dev_attr_qos.attr,
2812         NULL
2813 };
2814
2815 static struct attribute_group iwl_attribute_group = {
2816         .name = NULL,           /* put in device directory */
2817         .attrs = iwl_sysfs_entries,
2818 };
2819
2820 static struct ieee80211_ops iwl_hw_ops = {
2821         .tx = iwl_mac_tx,
2822         .start = iwl_mac_start,
2823         .stop = iwl_mac_stop,
2824         .add_interface = iwl_mac_add_interface,
2825         .remove_interface = iwl_mac_remove_interface,
2826         .config = iwl_mac_config,
2827         .configure_filter = iwl_configure_filter,
2828         .set_key = iwl_mac_set_key,
2829         .update_tkip_key = iwl_mac_update_tkip_key,
2830         .get_stats = iwl_mac_get_stats,
2831         .get_tx_stats = iwl_mac_get_tx_stats,
2832         .conf_tx = iwl_mac_conf_tx,
2833         .reset_tsf = iwl_mac_reset_tsf,
2834         .bss_info_changed = iwl_bss_info_changed,
2835         .ampdu_action = iwl_mac_ampdu_action,
2836         .hw_scan = iwl_mac_hw_scan
2837 };
2838
2839 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2840 {
2841         int err = 0;
2842         struct iwl_priv *priv;
2843         struct ieee80211_hw *hw;
2844         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
2845         unsigned long flags;
2846         u16 pci_cmd;
2847
2848         /************************
2849          * 1. Allocating HW data
2850          ************************/
2851
2852         /* Disabling hardware scan means that mac80211 will perform scans
2853          * "the hard way", rather than using device's scan. */
2854         if (cfg->mod_params->disable_hw_scan) {
2855                 if (cfg->mod_params->debug & IWL_DL_INFO)
2856                         dev_printk(KERN_DEBUG, &(pdev->dev),
2857                                    "Disabling hw_scan\n");
2858                 iwl_hw_ops.hw_scan = NULL;
2859         }
2860
2861         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
2862         if (!hw) {
2863                 err = -ENOMEM;
2864                 goto out;
2865         }
2866         priv = hw->priv;
2867         /* At this point both hw and priv are allocated. */
2868
2869         SET_IEEE80211_DEV(hw, &pdev->dev);
2870
2871         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
2872         priv->cfg = cfg;
2873         priv->pci_dev = pdev;
2874         priv->inta_mask = CSR_INI_SET_MASK;
2875
2876 #ifdef CONFIG_IWLWIFI_DEBUG
2877         priv->debug_level = priv->cfg->mod_params->debug;
2878         atomic_set(&priv->restrict_refcnt, 0);
2879 #endif
2880
2881         /**************************
2882          * 2. Initializing PCI bus
2883          **************************/
2884         if (pci_enable_device(pdev)) {
2885                 err = -ENODEV;
2886                 goto out_ieee80211_free_hw;
2887         }
2888
2889         pci_set_master(pdev);
2890
2891         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2892         if (!err)
2893                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2894         if (err) {
2895                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2896                 if (!err)
2897                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2898                 /* both attempts failed: */
2899                 if (err) {
2900                         IWL_WARN(priv, "No suitable DMA available.\n");
2901                         goto out_pci_disable_device;
2902                 }
2903         }
2904
2905         err = pci_request_regions(pdev, DRV_NAME);
2906         if (err)
2907                 goto out_pci_disable_device;
2908
2909         pci_set_drvdata(pdev, priv);
2910
2911
2912         /***********************
2913          * 3. Read REV register
2914          ***********************/
2915         priv->hw_base = pci_iomap(pdev, 0, 0);
2916         if (!priv->hw_base) {
2917                 err = -ENODEV;
2918                 goto out_pci_release_regions;
2919         }
2920
2921         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
2922                 (unsigned long long) pci_resource_len(pdev, 0));
2923         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
2924
2925         /* this spin lock will be used in apm_ops.init and EEPROM access
2926          * we should init now
2927          */
2928         spin_lock_init(&priv->reg_lock);
2929         iwl_hw_detect(priv);
2930         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
2931                 priv->cfg->name, priv->hw_rev);
2932
2933         /* We disable the RETRY_TIMEOUT register (0x41) to keep
2934          * PCI Tx retries from interfering with C3 CPU state */
2935         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2936
2937         iwl_prepare_card_hw(priv);
2938         if (!priv->hw_ready) {
2939                 IWL_WARN(priv, "Failed, HW not ready\n");
2940                 goto out_iounmap;
2941         }
2942
2943         /* amp init */
2944         err = priv->cfg->ops->lib->apm_ops.init(priv);
2945         if (err < 0) {
2946                 IWL_ERR(priv, "Failed to init APMG\n");
2947                 goto out_iounmap;
2948         }
2949         /*****************
2950          * 4. Read EEPROM
2951          *****************/
2952         /* Read the EEPROM */
2953         err = iwl_eeprom_init(priv);
2954         if (err) {
2955                 IWL_ERR(priv, "Unable to init EEPROM\n");
2956                 goto out_iounmap;
2957         }
2958         err = iwl_eeprom_check_version(priv);
2959         if (err)
2960                 goto out_free_eeprom;
2961
2962         /* extract MAC Address */
2963         iwl_eeprom_get_mac(priv, priv->mac_addr);
2964         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
2965         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
2966
2967         /************************
2968          * 5. Setup HW constants
2969          ************************/
2970         if (iwl_set_hw_params(priv)) {
2971                 IWL_ERR(priv, "failed to set hw parameters\n");
2972                 goto out_free_eeprom;
2973         }
2974
2975         /*******************
2976          * 6. Setup priv
2977          *******************/
2978
2979         err = iwl_init_drv(priv);
2980         if (err)
2981                 goto out_free_eeprom;
2982         /* At this point both hw and priv are initialized. */
2983
2984         /********************
2985          * 7. Setup services
2986          ********************/
2987         spin_lock_irqsave(&priv->lock, flags);
2988         iwl_disable_interrupts(priv);
2989         spin_unlock_irqrestore(&priv->lock, flags);
2990
2991         pci_enable_msi(priv->pci_dev);
2992
2993         iwl_alloc_isr_ict(priv);
2994         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
2995                           IRQF_SHARED, DRV_NAME, priv);
2996         if (err) {
2997                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
2998                 goto out_disable_msi;
2999         }
3000         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3001         if (err) {
3002                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3003                 goto out_free_irq;
3004         }
3005
3006         iwl_setup_deferred_work(priv);
3007         iwl_setup_rx_handlers(priv);
3008
3009         /**********************************
3010          * 8. Setup and register mac80211
3011          **********************************/
3012
3013         /* enable interrupts if needed: hw bug w/a */
3014         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3015         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3016                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3017                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3018         }
3019
3020         iwl_enable_interrupts(priv);
3021
3022         err = iwl_setup_mac(priv);
3023         if (err)
3024                 goto out_remove_sysfs;
3025
3026         err = iwl_dbgfs_register(priv, DRV_NAME);
3027         if (err)
3028                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3029
3030         /* If platform's RF_KILL switch is NOT set to KILL */
3031         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3032                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3033         else
3034                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3035
3036         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3037                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3038
3039         iwl_power_initialize(priv);
3040         return 0;
3041
3042  out_remove_sysfs:
3043         destroy_workqueue(priv->workqueue);
3044         priv->workqueue = NULL;
3045         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3046  out_free_irq:
3047         free_irq(priv->pci_dev->irq, priv);
3048         iwl_free_isr_ict(priv);
3049  out_disable_msi:
3050         pci_disable_msi(priv->pci_dev);
3051         iwl_uninit_drv(priv);
3052  out_free_eeprom:
3053         iwl_eeprom_free(priv);
3054  out_iounmap:
3055         pci_iounmap(pdev, priv->hw_base);
3056  out_pci_release_regions:
3057         pci_set_drvdata(pdev, NULL);
3058         pci_release_regions(pdev);
3059  out_pci_disable_device:
3060         pci_disable_device(pdev);
3061  out_ieee80211_free_hw:
3062         ieee80211_free_hw(priv->hw);
3063  out:
3064         return err;
3065 }
3066
3067 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3068 {
3069         struct iwl_priv *priv = pci_get_drvdata(pdev);
3070         unsigned long flags;
3071
3072         if (!priv)
3073                 return;
3074
3075         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3076
3077         iwl_dbgfs_unregister(priv);
3078         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3079
3080         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3081          * to be called and iwl_down since we are removing the device
3082          * we need to set STATUS_EXIT_PENDING bit.
3083          */
3084         set_bit(STATUS_EXIT_PENDING, &priv->status);
3085         if (priv->mac80211_registered) {
3086                 ieee80211_unregister_hw(priv->hw);
3087                 priv->mac80211_registered = 0;
3088         } else {
3089                 iwl_down(priv);
3090         }
3091
3092         /* make sure we flush any pending irq or
3093          * tasklet for the driver
3094          */
3095         spin_lock_irqsave(&priv->lock, flags);
3096         iwl_disable_interrupts(priv);
3097         spin_unlock_irqrestore(&priv->lock, flags);
3098
3099         iwl_synchronize_irq(priv);
3100
3101         iwl_dealloc_ucode_pci(priv);
3102
3103         if (priv->rxq.bd)
3104                 iwl_rx_queue_free(priv, &priv->rxq);
3105         iwl_hw_txq_ctx_free(priv);
3106
3107         iwl_clear_stations_table(priv);
3108         iwl_eeprom_free(priv);
3109
3110
3111         /*netif_stop_queue(dev); */
3112         flush_workqueue(priv->workqueue);
3113
3114         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3115          * priv->workqueue... so we can't take down the workqueue
3116          * until now... */
3117         destroy_workqueue(priv->workqueue);
3118         priv->workqueue = NULL;
3119
3120         free_irq(priv->pci_dev->irq, priv);
3121         pci_disable_msi(priv->pci_dev);
3122         pci_iounmap(pdev, priv->hw_base);
3123         pci_release_regions(pdev);
3124         pci_disable_device(pdev);
3125         pci_set_drvdata(pdev, NULL);
3126
3127         iwl_uninit_drv(priv);
3128
3129         iwl_free_isr_ict(priv);
3130
3131         if (priv->ibss_beacon)
3132                 dev_kfree_skb(priv->ibss_beacon);
3133
3134         ieee80211_free_hw(priv->hw);
3135 }
3136
3137
3138 /*****************************************************************************
3139  *
3140  * driver and module entry point
3141  *
3142  *****************************************************************************/
3143
3144 /* Hardware specific file defines the PCI IDs table for that hardware module */
3145 static struct pci_device_id iwl_hw_card_ids[] = {
3146 #ifdef CONFIG_IWL4965
3147         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3148         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3149 #endif /* CONFIG_IWL4965 */
3150 #ifdef CONFIG_IWL5000
3151         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3152         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3153         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3154         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3155         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3156         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3157         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3158         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3159         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3160         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3161 /* 5350 WiFi/WiMax */
3162         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3163         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3164         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3165 /* 5150 Wifi/WiMax */
3166         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3167         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3168 /* 6000/6050 Series */
3169         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3170         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3171         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3172         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3173         {IWL_PCI_DEVICE(0x422C, PCI_ANY_ID, iwl6000_2agn_cfg)},
3174         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3175         {IWL_PCI_DEVICE(0x4239, PCI_ANY_ID, iwl6000_2agn_cfg)},
3176         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3177         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3178         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3179         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3180         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3181         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3182 /* 1000 Series WiFi */
3183         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
3184         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
3185 #endif /* CONFIG_IWL5000 */
3186
3187         {0}
3188 };
3189 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3190
3191 static struct pci_driver iwl_driver = {
3192         .name = DRV_NAME,
3193         .id_table = iwl_hw_card_ids,
3194         .probe = iwl_pci_probe,
3195         .remove = __devexit_p(iwl_pci_remove),
3196 #ifdef CONFIG_PM
3197         .suspend = iwl_pci_suspend,
3198         .resume = iwl_pci_resume,
3199 #endif
3200 };
3201
3202 static int __init iwl_init(void)
3203 {
3204
3205         int ret;
3206         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3207         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3208
3209         ret = iwlagn_rate_control_register();
3210         if (ret) {
3211                 printk(KERN_ERR DRV_NAME
3212                        "Unable to register rate control algorithm: %d\n", ret);
3213                 return ret;
3214         }
3215
3216         ret = pci_register_driver(&iwl_driver);
3217         if (ret) {
3218                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3219                 goto error_register;
3220         }
3221
3222         return ret;
3223
3224 error_register:
3225         iwlagn_rate_control_unregister();
3226         return ret;
3227 }
3228
3229 static void __exit iwl_exit(void)
3230 {
3231         pci_unregister_driver(&iwl_driver);
3232         iwlagn_rate_control_unregister();
3233 }
3234
3235 module_exit(iwl_exit);
3236 module_init(iwl_init);