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/sched.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #define DRV_NAME        "iwlagn"
  49
  50 #include "iwl-eeprom.h"
  51 #include "iwl-dev.h"
  52 #include "iwl-core.h"
  53 #include "iwl-io.h"
  54 #include "iwl-helpers.h"
  55 #include "iwl-sta.h"
  56 #include "iwl-calib.h"
  57
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /*
  66  * module name, copyright, version, etc.
  67  */
  68 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  69
  70 #ifdef CONFIG_IWLWIFI_DEBUG
  71 #define VD "d"
  72 #else
  73 #define VD
  74 #endif
  75
  76 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  77 #define VS "s"
  78 #else
  79 #define VS
  80 #endif
  81
  82 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89 MODULE_ALIAS("iwl4965");
  90
  91 /*************** STATION TABLE MANAGEMENT ****
  92  * mac80211 should be examined to determine if sta_info is duplicating
  93  * the functionality provided here
  94  */
  95
  96 /**************************************************************/
  97
  98 /**
  99  * iwl_commit_rxon - commit staging_rxon to hardware
 100  *
 101  * The RXON command in staging_rxon is committed to the hardware and
 102  * the active_rxon structure is updated with the new data.  This
 103  * function correctly transitions out of the RXON_ASSOC_MSK state if
 104  * a HW tune is required based on the RXON structure changes.
 105  */
 106 int iwl_commit_rxon(struct iwl_priv *priv)
 107 {
 108         /* cast away the const for active_rxon in this function */
 109         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 110         int ret;
 111         bool new_assoc =
 112                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 113
 114         if (!iwl_is_alive(priv))
 115                 return -EBUSY;
 116
 117         /* always get timestamp with Rx frame */
 118         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 119
 120         ret = iwl_check_rxon_cmd(priv);
 121         if (ret) {
 122                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 123                 return -EINVAL;
 124         }
 125
 126         /*
 127          * receive commit_rxon request
 128          * abort any previous channel switch if still in process
 129          */
 130         if (priv->switch_rxon.switch_in_progress &&
 131             (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
 132                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 133                       le16_to_cpu(priv->switch_rxon.channel));
 134                 priv->switch_rxon.switch_in_progress = false;
 135         }
 136
 137         /* If we don't need to send a full RXON, we can use
 138          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 139          * and other flags for the current radio configuration. */
 140         if (!iwl_full_rxon_required(priv)) {
 141                 ret = iwl_send_rxon_assoc(priv);
 142                 if (ret) {
 143                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 144                         return ret;
 145                 }
 146
 147                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 148                 iwl_print_rx_config_cmd(priv);
 149                 return 0;
 150         }
 151
 152         /* station table will be cleared */
 153         priv->assoc_station_added = 0;
 154
 155         /* If we are currently associated and the new config requires
 156          * an RXON_ASSOC and the new config wants the associated mask enabled,
 157          * we must clear the associated from the active configuration
 158          * before we apply the new config */
 159         if (iwl_is_associated(priv) && new_assoc) {
 160                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 161                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 162
 163                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 164                                       sizeof(struct iwl_rxon_cmd),
 165                                       &priv->active_rxon);
 166
 167                 /* If the mask clearing failed then we set
 168                  * active_rxon back to what it was previously */
 169                 if (ret) {
 170                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 171                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 172                         return ret;
 173                 }
 174         }
 175
 176         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 177                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 178                        "* channel = %d\n"
 179                        "* bssid = %pM\n",
 180                        (new_assoc ? "" : "out"),
 181                        le16_to_cpu(priv->staging_rxon.channel),
 182                        priv->staging_rxon.bssid_addr);
 183
 184         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 185
 186         /* Apply the new configuration
 187          * RXON unassoc clears the station table in uCode, send it before
 188          * we add the bcast station. If assoc bit is set, we will send RXON
 189          * after having added the bcast and bssid station.
 190          */
 191         if (!new_assoc) {
 192                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 193                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 194                 if (ret) {
 195                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 196                         return ret;
 197                 }
 198                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 199         }
 200
 201         iwl_clear_stations_table(priv);
 202
 203         priv->start_calib = 0;
 204
 205         /* Add the broadcast address so we can send broadcast frames */
 206         iwl_add_bcast_station(priv);
 207
 208         /* If we have set the ASSOC_MSK and we are in BSS mode then
 209          * add the IWL_AP_ID to the station rate table */
 210         if (new_assoc) {
 211                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 212                         ret = iwl_rxon_add_station(priv,
 213                                            priv->active_rxon.bssid_addr, 1);
 214                         if (ret == IWL_INVALID_STATION) {
 215                                 IWL_ERR(priv,
 216                                         "Error adding AP address for TX.\n");
 217                                 return -EIO;
 218                         }
 219                         priv->assoc_station_added = 1;
 220                         if (priv->default_wep_key &&
 221                             iwl_send_static_wepkey_cmd(priv, 0))
 222                                 IWL_ERR(priv,
 223                                         "Could not send WEP static key.\n");
 224                 }
 225
 226                 /*
 227                  * allow CTS-to-self if possible for new association.
 228                  * this is relevant only for 5000 series and up,
 229                  * but will not damage 4965
 230                  */
 231                 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 232
 233                 /* Apply the new configuration
 234                  * RXON assoc doesn't clear the station table in uCode,
 235                  */
 236                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 237                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 238                 if (ret) {
 239                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 240                         return ret;
 241                 }
 242                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 243         }
 244         iwl_print_rx_config_cmd(priv);
 245
 246         iwl_init_sensitivity(priv);
 247
 248         /* If we issue a new RXON command which required a tune then we must
 249          * send a new TXPOWER command or we won't be able to Tx any frames */
 250         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 251         if (ret) {
 252                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 253                 return ret;
 254         }
 255
 256         return 0;
 257 }
 258
 259 void iwl_update_chain_flags(struct iwl_priv *priv)
 260 {
 261
 262         if (priv->cfg->ops->hcmd->set_rxon_chain)
 263                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 264         iwlcore_commit_rxon(priv);
 265 }
 266
 267 static void iwl_clear_free_frames(struct iwl_priv *priv)
 268 {
 269         struct list_head *element;
 270
 271         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 272                        priv->frames_count);
 273
 274         while (!list_empty(&priv->free_frames)) {
 275                 element = priv->free_frames.next;
 276                 list_del(element);
 277                 kfree(list_entry(element, struct iwl_frame, list));
 278                 priv->frames_count--;
 279         }
 280
 281         if (priv->frames_count) {
 282                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 283                             priv->frames_count);
 284                 priv->frames_count = 0;
 285         }
 286 }
 287
 288 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 289 {
 290         struct iwl_frame *frame;
 291         struct list_head *element;
 292         if (list_empty(&priv->free_frames)) {
 293                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 294                 if (!frame) {
 295                         IWL_ERR(priv, "Could not allocate frame!\n");
 296                         return NULL;
 297                 }
 298
 299                 priv->frames_count++;
 300                 return frame;
 301         }
 302
 303         element = priv->free_frames.next;
 304         list_del(element);
 305         return list_entry(element, struct iwl_frame, list);
 306 }
 307
 308 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 309 {
 310         memset(frame, 0, sizeof(*frame));
 311         list_add(&frame->list, &priv->free_frames);
 312 }
 313
 314 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
 315                                           struct ieee80211_hdr *hdr,
 316                                           int left)
 317 {
 318         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 319             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 320              (priv->iw_mode != NL80211_IFTYPE_AP)))
 321                 return 0;
 322
 323         if (priv->ibss_beacon->len > left)
 324                 return 0;
 325
 326         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 327
 328         return priv->ibss_beacon->len;
 329 }
 330
 331 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 332 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 333                 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 334                 u8 *beacon, u32 frame_size)
 335 {
 336         u16 tim_idx;
 337         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 338
 339         /*
 340          * The index is relative to frame start but we start looking at the
 341          * variable-length part of the beacon.
 342          */
 343         tim_idx = mgmt->u.beacon.variable - beacon;
 344
 345         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 346         while ((tim_idx < (frame_size - 2)) &&
 347                         (beacon[tim_idx] != WLAN_EID_TIM))
 348                 tim_idx += beacon[tim_idx+1] + 2;
 349
 350         /* If TIM field was found, set variables */
 351         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 352                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 353                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 354         } else
 355                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 356 }
 357
 358 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 359                                        struct iwl_frame *frame)
 360 {
 361         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 362         u32 frame_size;
 363         u32 rate_flags;
 364         u32 rate;
 365         /*
 366          * We have to set up the TX command, the TX Beacon command, and the
 367          * beacon contents.
 368          */
 369
 370         /* Initialize memory */
 371         tx_beacon_cmd = &frame->u.beacon;
 372         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 373
 374         /* Set up TX beacon contents */
 375         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 376                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 377         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
 378                 return 0;
 379
 380         /* Set up TX command fields */
 381         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 382         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 383         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 384         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 385                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 386
 387         /* Set up TX beacon command fields */
 388         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
 389                         frame_size);
 390
 391         /* Set up packet rate and flags */
 392         rate = iwl_rate_get_lowest_plcp(priv);
 393         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
 394         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 395         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
 396                 rate_flags |= RATE_MCS_CCK_MSK;
 397         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
 398                         rate_flags);
 399
 400         return sizeof(*tx_beacon_cmd) + frame_size;
 401 }
 402 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 403 {
 404         struct iwl_frame *frame;
 405         unsigned int frame_size;
 406         int rc;
 407
 408         frame = iwl_get_free_frame(priv);
 409         if (!frame) {
 410                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 411                           "command.\n");
 412                 return -ENOMEM;
 413         }
 414
 415         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
 416         if (!frame_size) {
 417                 IWL_ERR(priv, "Error configuring the beacon command\n");
 418                 iwl_free_frame(priv, frame);
 419                 return -EINVAL;
 420         }
 421
 422         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 423                               &frame->u.cmd[0]);
 424
 425         iwl_free_frame(priv, frame);
 426
 427         return rc;
 428 }
 429
 430 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 431 {
 432         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 433
 434         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 435         if (sizeof(dma_addr_t) > sizeof(u32))
 436                 addr |=
 437                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 438
 439         return addr;
 440 }
 441
 442 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 443 {
 444         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 445
 446         return le16_to_cpu(tb->hi_n_len) >> 4;
 447 }
 448
 449 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 450                                   dma_addr_t addr, u16 len)
 451 {
 452         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 453         u16 hi_n_len = len << 4;
 454
 455         put_unaligned_le32(addr, &tb->lo);
 456         if (sizeof(dma_addr_t) > sizeof(u32))
 457                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 458
 459         tb->hi_n_len = cpu_to_le16(hi_n_len);
 460
 461         tfd->num_tbs = idx + 1;
 462 }
 463
 464 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 465 {
 466         return tfd->num_tbs & 0x1f;
 467 }
 468
 469 /**
 470  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 471  * @priv - driver private data
 472  * @txq - tx queue
 473  *
 474  * Does NOT advance any TFD circular buffer read/write indexes
 475  * Does NOT free the TFD itself (which is within circular buffer)
 476  */
 477 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 478 {
 479         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 480         struct iwl_tfd *tfd;
 481         struct pci_dev *dev = priv->pci_dev;
 482         int index = txq->q.read_ptr;
 483         int i;
 484         int num_tbs;
 485
 486         tfd = &tfd_tmp[index];
 487
 488         /* Sanity check on number of chunks */
 489         num_tbs = iwl_tfd_get_num_tbs(tfd);
 490
 491         if (num_tbs >= IWL_NUM_OF_TBS) {
 492                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 493                 /* @todo issue fatal error, it is quite serious situation */
 494                 return;
 495         }
 496
 497         /* Unmap tx_cmd */
 498         if (num_tbs)
 499                 pci_unmap_single(dev,
 500                                 pci_unmap_addr(&txq->meta[index], mapping),
 501                                 pci_unmap_len(&txq->meta[index], len),
 502                                 PCI_DMA_BIDIRECTIONAL);
 503
 504         /* Unmap chunks, if any. */
 505         for (i = 1; i < num_tbs; i++) {
 506                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 507                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 508
 509                 if (txq->txb) {
 510                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 511                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 512                 }
 513         }
 514 }
 515
 516 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 517                                  struct iwl_tx_queue *txq,
 518                                  dma_addr_t addr, u16 len,
 519                                  u8 reset, u8 pad)
 520 {
 521         struct iwl_queue *q;
 522         struct iwl_tfd *tfd, *tfd_tmp;
 523         u32 num_tbs;
 524
 525         q = &txq->q;
 526         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 527         tfd = &tfd_tmp[q->write_ptr];
 528
 529         if (reset)
 530                 memset(tfd, 0, sizeof(*tfd));
 531
 532         num_tbs = iwl_tfd_get_num_tbs(tfd);
 533
 534         /* Each TFD can point to a maximum 20 Tx buffers */
 535         if (num_tbs >= IWL_NUM_OF_TBS) {
 536                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 537                           IWL_NUM_OF_TBS);
 538                 return -EINVAL;
 539         }
 540
 541         BUG_ON(addr & ~DMA_BIT_MASK(36));
 542         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 543                 IWL_ERR(priv, "Unaligned address = %llx\n",
 544                           (unsigned long long)addr);
 545
 546         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 547
 548         return 0;
 549 }
 550
 551 /*
 552  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 553  * given Tx queue, and enable the DMA channel used for that queue.
 554  *
 555  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 556  * channels supported in hardware.
 557  */
 558 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 559                          struct iwl_tx_queue *txq)
 560 {
 561         int txq_id = txq->q.id;
 562
 563         /* Circular buffer (TFD queue in DRAM) physical base address */
 564         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 565                              txq->q.dma_addr >> 8);
 566
 567         return 0;
 568 }
 569
 570 /******************************************************************************
 571  *
 572  * Generic RX handler implementations
 573  *
 574  ******************************************************************************/
 575 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 576                                 struct iwl_rx_mem_buffer *rxb)
 577 {
 578         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 579         struct iwl_alive_resp *palive;
 580         struct delayed_work *pwork;
 581
 582         palive = &pkt->u.alive_frame;
 583
 584         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 585                        "0x%01X 0x%01X\n",
 586                        palive->is_valid, palive->ver_type,
 587                        palive->ver_subtype);
 588
 589         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 590                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 591                 memcpy(&priv->card_alive_init,
 592                        &pkt->u.alive_frame,
 593                        sizeof(struct iwl_init_alive_resp));
 594                 pwork = &priv->init_alive_start;
 595         } else {
 596                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 597                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 598                        sizeof(struct iwl_alive_resp));
 599                 pwork = &priv->alive_start;
 600         }
 601
 602         /* We delay the ALIVE response by 5ms to
 603          * give the HW RF Kill time to activate... */
 604         if (palive->is_valid == UCODE_VALID_OK)
 605                 queue_delayed_work(priv->workqueue, pwork,
 606                                    msecs_to_jiffies(5));
 607         else
 608                 IWL_WARN(priv, "uCode did not respond OK.\n");
 609 }
 610
 611 static void iwl_bg_beacon_update(struct work_struct *work)
 612 {
 613         struct iwl_priv *priv =
 614                 container_of(work, struct iwl_priv, beacon_update);
 615         struct sk_buff *beacon;
 616
 617         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 618         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 619
 620         if (!beacon) {
 621                 IWL_ERR(priv, "update beacon failed\n");
 622                 return;
 623         }
 624
 625         mutex_lock(&priv->mutex);
 626         /* new beacon skb is allocated every time; dispose previous.*/
 627         if (priv->ibss_beacon)
 628                 dev_kfree_skb(priv->ibss_beacon);
 629
 630         priv->ibss_beacon = beacon;
 631         mutex_unlock(&priv->mutex);
 632
 633         iwl_send_beacon_cmd(priv);
 634 }
 635
 636 /**
 637  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 638  *
 639  * This callback is provided in order to send a statistics request.
 640  *
 641  * This timer function is continually reset to execute within
 642  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 643  * was received.  We need to ensure we receive the statistics in order
 644  * to update the temperature used for calibrating the TXPOWER.
 645  */
 646 static void iwl_bg_statistics_periodic(unsigned long data)
 647 {
 648         struct iwl_priv *priv = (struct iwl_priv *)data;
 649
 650         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 651                 return;
 652
 653         /* dont send host command if rf-kill is on */
 654         if (!iwl_is_ready_rf(priv))
 655                 return;
 656
 657         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 658 }
 659
 660 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 661                                 struct iwl_rx_mem_buffer *rxb)
 662 {
 663 #ifdef CONFIG_IWLWIFI_DEBUG
 664         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 665         struct iwl4965_beacon_notif *beacon =
 666                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 667         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 668
 669         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 670                 "tsf %d %d rate %d\n",
 671                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 672                 beacon->beacon_notify_hdr.failure_frame,
 673                 le32_to_cpu(beacon->ibss_mgr_status),
 674                 le32_to_cpu(beacon->high_tsf),
 675                 le32_to_cpu(beacon->low_tsf), rate);
 676 #endif
 677
 678         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 679             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 680                 queue_work(priv->workqueue, &priv->beacon_update);
 681 }
 682
 683 /* Handle notification from uCode that card's power state is changing
 684  * due to software, hardware, or critical temperature RFKILL */
 685 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 686                                     struct iwl_rx_mem_buffer *rxb)
 687 {
 688         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 689         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 690         unsigned long status = priv->status;
 691
 692         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 693                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 694                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 695
 696         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 697                      RF_CARD_DISABLED)) {
 698
 699                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 700                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 701
 702                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 703                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 704
 705                 if (!(flags & RXON_CARD_DISABLED)) {
 706                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 707                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 708                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 709                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 710                 }
 711                 if (flags & RF_CARD_DISABLED)
 712                         iwl_tt_enter_ct_kill(priv);
 713         }
 714         if (!(flags & RF_CARD_DISABLED))
 715                 iwl_tt_exit_ct_kill(priv);
 716
 717         if (flags & HW_CARD_DISABLED)
 718                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 719         else
 720                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 721
 722
 723         if (!(flags & RXON_CARD_DISABLED))
 724                 iwl_scan_cancel(priv);
 725
 726         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 727              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 728                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 729                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 730         else
 731                 wake_up_interruptible(&priv->wait_command_queue);
 732 }
 733
 734 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 735 {
 736         if (src == IWL_PWR_SRC_VAUX) {
 737                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 738                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 739                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 740                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 741         } else {
 742                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 743                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 744                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 745         }
 746
 747         return 0;
 748 }
 749
 750 /**
 751  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 752  *
 753  * Setup the RX handlers for each of the reply types sent from the uCode
 754  * to the host.
 755  *
 756  * This function chains into the hardware specific files for them to setup
 757  * any hardware specific handlers as well.
 758  */
 759 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 760 {
 761         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 762         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 763         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 764         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 765         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 766             iwl_rx_pm_debug_statistics_notif;
 767         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 768
 769         /*
 770          * The same handler is used for both the REPLY to a discrete
 771          * statistics request from the host as well as for the periodic
 772          * statistics notifications (after received beacons) from the uCode.
 773          */
 774         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
 775         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 776
 777         iwl_setup_spectrum_handlers(priv);
 778         iwl_setup_rx_scan_handlers(priv);
 779
 780         /* status change handler */
 781         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 782
 783         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 784             iwl_rx_missed_beacon_notif;
 785         /* Rx handlers */
 786         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 787         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 788         /* block ack */
 789         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 790         /* Set up hardware specific Rx handlers */
 791         priv->cfg->ops->lib->rx_handler_setup(priv);
 792 }
 793
 794 /**
 795  * iwl_rx_handle - Main entry function for receiving responses from uCode
 796  *
 797  * Uses the priv->rx_handlers callback function array to invoke
 798  * the appropriate handlers, including command responses,
 799  * frame-received notifications, and other notifications.
 800  */
 801 void iwl_rx_handle(struct iwl_priv *priv)
 802 {
 803         struct iwl_rx_mem_buffer *rxb;
 804         struct iwl_rx_packet *pkt;
 805         struct iwl_rx_queue *rxq = &priv->rxq;
 806         u32 r, i;
 807         int reclaim;
 808         unsigned long flags;
 809         u8 fill_rx = 0;
 810         u32 count = 8;
 811         int total_empty;
 812
 813         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 814          * buffer that the driver may process (last buffer filled by ucode). */
 815         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 816         i = rxq->read;
 817
 818         /* Rx interrupt, but nothing sent from uCode */
 819         if (i == r)
 820                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 821
 822         /* calculate total frames need to be restock after handling RX */
 823         total_empty = r - rxq->write_actual;
 824         if (total_empty < 0)
 825                 total_empty += RX_QUEUE_SIZE;
 826
 827         if (total_empty > (RX_QUEUE_SIZE / 2))
 828                 fill_rx = 1;
 829
 830         while (i != r) {
 831                 rxb = rxq->queue[i];
 832
 833                 /* If an RXB doesn't have a Rx queue slot associated with it,
 834                  * then a bug has been introduced in the queue refilling
 835                  * routines -- catch it here */
 836                 BUG_ON(rxb == NULL);
 837
 838                 rxq->queue[i] = NULL;
 839
 840                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
 841                                PAGE_SIZE << priv->hw_params.rx_page_order,
 842                                PCI_DMA_FROMDEVICE);
 843                 pkt = rxb_addr(rxb);
 844
 845                 trace_iwlwifi_dev_rx(priv, pkt,
 846                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
 847
 848                 /* Reclaim a command buffer only if this packet is a response
 849                  *   to a (driver-originated) command.
 850                  * If the packet (e.g. Rx frame) originated from uCode,
 851                  *   there is no command buffer to reclaim.
 852                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 853                  *   but apparently a few don't get set; catch them here. */
 854                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 855                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 856                         (pkt->hdr.cmd != REPLY_RX) &&
 857                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 858                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 859                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 860                         (pkt->hdr.cmd != REPLY_TX);
 861
 862                 /* Based on type of command response or notification,
 863                  *   handle those that need handling via function in
 864                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 865                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 866                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 867                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 868                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 869                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 870                 } else {
 871                         /* No handling needed */
 872                         IWL_DEBUG_RX(priv,
 873                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 874                                 r, i, get_cmd_string(pkt->hdr.cmd),
 875                                 pkt->hdr.cmd);
 876                 }
 877
 878                 /*
 879                  * XXX: After here, we should always check rxb->page
 880                  * against NULL before touching it or its virtual
 881                  * memory (pkt). Because some rx_handler might have
 882                  * already taken or freed the pages.
 883                  */
 884
 885                 if (reclaim) {
 886                         /* Invoke any callbacks, transfer the buffer to caller,
 887                          * and fire off the (possibly) blocking iwl_send_cmd()
 888                          * as we reclaim the driver command queue */
 889                         if (rxb->page)
 890                                 iwl_tx_cmd_complete(priv, rxb);
 891                         else
 892                                 IWL_WARN(priv, "Claim null rxb?\n");
 893                 }
 894
 895                 /* Reuse the page if possible. For notification packets and
 896                  * SKBs that fail to Rx correctly, add them back into the
 897                  * rx_free list for reuse later. */
 898                 spin_lock_irqsave(&rxq->lock, flags);
 899                 if (rxb->page != NULL) {
 900                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
 901                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
 902                                 PCI_DMA_FROMDEVICE);
 903                         list_add_tail(&rxb->list, &rxq->rx_free);
 904                         rxq->free_count++;
 905                 } else
 906                         list_add_tail(&rxb->list, &rxq->rx_used);
 907
 908                 spin_unlock_irqrestore(&rxq->lock, flags);
 909
 910                 i = (i + 1) & RX_QUEUE_MASK;
 911                 /* If there are a lot of unused frames,
 912                  * restock the Rx queue so ucode wont assert. */
 913                 if (fill_rx) {
 914                         count++;
 915                         if (count >= 8) {
 916                                 rxq->read = i;
 917                                 iwl_rx_replenish_now(priv);
 918                                 count = 0;
 919                         }
 920                 }
 921         }
 922
 923         /* Backtrack one entry */
 924         rxq->read = i;
 925         if (fill_rx)
 926                 iwl_rx_replenish_now(priv);
 927         else
 928                 iwl_rx_queue_restock(priv);
 929 }
 930
 931 /* call this function to flush any scheduled tasklet */
 932 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 933 {
 934         /* wait to make sure we flush pending tasklet*/
 935         synchronize_irq(priv->pci_dev->irq);
 936         tasklet_kill(&priv->irq_tasklet);
 937 }
 938
 939 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
 940 {
 941         u32 inta, handled = 0;
 942         u32 inta_fh;
 943         unsigned long flags;
 944         u32 i;
 945 #ifdef CONFIG_IWLWIFI_DEBUG
 946         u32 inta_mask;
 947 #endif
 948
 949         spin_lock_irqsave(&priv->lock, flags);
 950
 951         /* Ack/clear/reset pending uCode interrupts.
 952          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 953          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
 954         inta = iwl_read32(priv, CSR_INT);
 955         iwl_write32(priv, CSR_INT, inta);
 956
 957         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
 958          * Any new interrupts that happen after this, either while we're
 959          * in this tasklet, or later, will show up in next ISR/tasklet. */
 960         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
 961         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
 962
 963 #ifdef CONFIG_IWLWIFI_DEBUG
 964         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
 965                 /* just for debug */
 966                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 967                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
 968                               inta, inta_mask, inta_fh);
 969         }
 970 #endif
 971
 972         spin_unlock_irqrestore(&priv->lock, flags);
 973
 974         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
 975          * atomic, make sure that inta covers all the interrupts that
 976          * we've discovered, even if FH interrupt came in just after
 977          * reading CSR_INT. */
 978         if (inta_fh & CSR49_FH_INT_RX_MASK)
 979                 inta |= CSR_INT_BIT_FH_RX;
 980         if (inta_fh & CSR49_FH_INT_TX_MASK)
 981                 inta |= CSR_INT_BIT_FH_TX;
 982
 983         /* Now service all interrupt bits discovered above. */
 984         if (inta & CSR_INT_BIT_HW_ERR) {
 985                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 986
 987                 /* Tell the device to stop sending interrupts */
 988                 iwl_disable_interrupts(priv);
 989
 990                 priv->isr_stats.hw++;
 991                 iwl_irq_handle_error(priv);
 992
 993                 handled |= CSR_INT_BIT_HW_ERR;
 994
 995                 return;
 996         }
 997
 998 #ifdef CONFIG_IWLWIFI_DEBUG
 999         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1000                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1001                 if (inta & CSR_INT_BIT_SCD) {
1002                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1003                                       "the frame/frames.\n");
1004                         priv->isr_stats.sch++;
1005                 }
1006
1007                 /* Alive notification via Rx interrupt will do the real work */
1008                 if (inta & CSR_INT_BIT_ALIVE) {
1009                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1010                         priv->isr_stats.alive++;
1011                 }
1012         }
1013 #endif
1014         /* Safely ignore these bits for debug checks below */
1015         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1016
1017         /* HW RF KILL switch toggled */
1018         if (inta & CSR_INT_BIT_RF_KILL) {
1019                 int hw_rf_kill = 0;
1020                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1021                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1022                         hw_rf_kill = 1;
1023
1024                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1025                                 hw_rf_kill ? "disable radio" : "enable radio");
1026
1027                 priv->isr_stats.rfkill++;
1028
1029                 /* driver only loads ucode once setting the interface up.
1030                  * the driver allows loading the ucode even if the radio
1031                  * is killed. Hence update the killswitch state here. The
1032                  * rfkill handler will care about restarting if needed.
1033                  */
1034                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1035                         if (hw_rf_kill)
1036                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1037                         else
1038                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1039                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1040                 }
1041
1042                 handled |= CSR_INT_BIT_RF_KILL;
1043         }
1044
1045         /* Chip got too hot and stopped itself */
1046         if (inta & CSR_INT_BIT_CT_KILL) {
1047                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1048                 priv->isr_stats.ctkill++;
1049                 handled |= CSR_INT_BIT_CT_KILL;
1050         }
1051
1052         /* Error detected by uCode */
1053         if (inta & CSR_INT_BIT_SW_ERR) {
1054                 IWL_ERR(priv, "Microcode SW error detected. "
1055                         " Restarting 0x%X.\n", inta);
1056                 priv->isr_stats.sw++;
1057                 priv->isr_stats.sw_err = inta;
1058                 iwl_irq_handle_error(priv);
1059                 handled |= CSR_INT_BIT_SW_ERR;
1060         }
1061
1062         /*
1063          * uCode wakes up after power-down sleep.
1064          * Tell device about any new tx or host commands enqueued,
1065          * and about any Rx buffers made available while asleep.
1066          */
1067         if (inta & CSR_INT_BIT_WAKEUP) {
1068                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1069                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1070                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1071                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1072                 priv->isr_stats.wakeup++;
1073                 handled |= CSR_INT_BIT_WAKEUP;
1074         }
1075
1076         /* All uCode command responses, including Tx command responses,
1077          * Rx "responses" (frame-received notification), and other
1078          * notifications from uCode come through here*/
1079         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1080                 iwl_rx_handle(priv);
1081                 priv->isr_stats.rx++;
1082                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1083         }
1084
1085         /* This "Tx" DMA channel is used only for loading uCode */
1086         if (inta & CSR_INT_BIT_FH_TX) {
1087                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1088                 priv->isr_stats.tx++;
1089                 handled |= CSR_INT_BIT_FH_TX;
1090                 /* Wake up uCode load routine, now that load is complete */
1091                 priv->ucode_write_complete = 1;
1092                 wake_up_interruptible(&priv->wait_command_queue);
1093         }
1094
1095         if (inta & ~handled) {
1096                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1097                 priv->isr_stats.unhandled++;
1098         }
1099
1100         if (inta & ~(priv->inta_mask)) {
1101                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1102                          inta & ~priv->inta_mask);
1103                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1104         }
1105
1106         /* Re-enable all interrupts */
1107         /* only Re-enable if diabled by irq */
1108         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1109                 iwl_enable_interrupts(priv);
1110
1111 #ifdef CONFIG_IWLWIFI_DEBUG
1112         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1113                 inta = iwl_read32(priv, CSR_INT);
1114                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1115                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1116                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1117                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1118         }
1119 #endif
1120 }
1121
1122 /* tasklet for iwlagn interrupt */
1123 static void iwl_irq_tasklet(struct iwl_priv *priv)
1124 {
1125         u32 inta = 0;
1126         u32 handled = 0;
1127         unsigned long flags;
1128         u32 i;
1129 #ifdef CONFIG_IWLWIFI_DEBUG
1130         u32 inta_mask;
1131 #endif
1132
1133         spin_lock_irqsave(&priv->lock, flags);
1134
1135         /* Ack/clear/reset pending uCode interrupts.
1136          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1137          */
1138         iwl_write32(priv, CSR_INT, priv->inta);
1139
1140         inta = priv->inta;
1141
1142 #ifdef CONFIG_IWLWIFI_DEBUG
1143         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1144                 /* just for debug */
1145                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1146                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1147                                 inta, inta_mask);
1148         }
1149 #endif
1150
1151         spin_unlock_irqrestore(&priv->lock, flags);
1152
1153         /* saved interrupt in inta variable now we can reset priv->inta */
1154         priv->inta = 0;
1155
1156         /* Now service all interrupt bits discovered above. */
1157         if (inta & CSR_INT_BIT_HW_ERR) {
1158                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1159
1160                 /* Tell the device to stop sending interrupts */
1161                 iwl_disable_interrupts(priv);
1162
1163                 priv->isr_stats.hw++;
1164                 iwl_irq_handle_error(priv);
1165
1166                 handled |= CSR_INT_BIT_HW_ERR;
1167
1168                 return;
1169         }
1170
1171 #ifdef CONFIG_IWLWIFI_DEBUG
1172         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1173                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1174                 if (inta & CSR_INT_BIT_SCD) {
1175                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1176                                       "the frame/frames.\n");
1177                         priv->isr_stats.sch++;
1178                 }
1179
1180                 /* Alive notification via Rx interrupt will do the real work */
1181                 if (inta & CSR_INT_BIT_ALIVE) {
1182                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1183                         priv->isr_stats.alive++;
1184                 }
1185         }
1186 #endif
1187         /* Safely ignore these bits for debug checks below */
1188         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1189
1190         /* HW RF KILL switch toggled */
1191         if (inta & CSR_INT_BIT_RF_KILL) {
1192                 int hw_rf_kill = 0;
1193                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1194                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1195                         hw_rf_kill = 1;
1196
1197                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1198                                 hw_rf_kill ? "disable radio" : "enable radio");
1199
1200                 priv->isr_stats.rfkill++;
1201
1202                 /* driver only loads ucode once setting the interface up.
1203                  * the driver allows loading the ucode even if the radio
1204                  * is killed. Hence update the killswitch state here. The
1205                  * rfkill handler will care about restarting if needed.
1206                  */
1207                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1208                         if (hw_rf_kill)
1209                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1210                         else
1211                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1212                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1213                 }
1214
1215                 handled |= CSR_INT_BIT_RF_KILL;
1216         }
1217
1218         /* Chip got too hot and stopped itself */
1219         if (inta & CSR_INT_BIT_CT_KILL) {
1220                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1221                 priv->isr_stats.ctkill++;
1222                 handled |= CSR_INT_BIT_CT_KILL;
1223         }
1224
1225         /* Error detected by uCode */
1226         if (inta & CSR_INT_BIT_SW_ERR) {
1227                 IWL_ERR(priv, "Microcode SW error detected. "
1228                         " Restarting 0x%X.\n", inta);
1229                 priv->isr_stats.sw++;
1230                 priv->isr_stats.sw_err = inta;
1231                 iwl_irq_handle_error(priv);
1232                 handled |= CSR_INT_BIT_SW_ERR;
1233         }
1234
1235         /* uCode wakes up after power-down sleep */
1236         if (inta & CSR_INT_BIT_WAKEUP) {
1237                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1238                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1239                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1240                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1241
1242                 priv->isr_stats.wakeup++;
1243
1244                 handled |= CSR_INT_BIT_WAKEUP;
1245         }
1246
1247         /* All uCode command responses, including Tx command responses,
1248          * Rx "responses" (frame-received notification), and other
1249          * notifications from uCode come through here*/
1250         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1251                         CSR_INT_BIT_RX_PERIODIC)) {
1252                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1253                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1254                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1255                         iwl_write32(priv, CSR_FH_INT_STATUS,
1256                                         CSR49_FH_INT_RX_MASK);
1257                 }
1258                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1259                         handled |= CSR_INT_BIT_RX_PERIODIC;
1260                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1261                 }
1262                 /* Sending RX interrupt require many steps to be done in the
1263                  * the device:
1264                  * 1- write interrupt to current index in ICT table.
1265                  * 2- dma RX frame.
1266                  * 3- update RX shared data to indicate last write index.
1267                  * 4- send interrupt.
1268                  * This could lead to RX race, driver could receive RX interrupt
1269                  * but the shared data changes does not reflect this;
1270                  * periodic interrupt will detect any dangling Rx activity.
1271                  */
1272
1273                 /* Disable periodic interrupt; we use it as just a one-shot. */
1274                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1275                             CSR_INT_PERIODIC_DIS);
1276                 iwl_rx_handle(priv);
1277
1278                 /*
1279                  * Enable periodic interrupt in 8 msec only if we received
1280                  * real RX interrupt (instead of just periodic int), to catch
1281                  * any dangling Rx interrupt.  If it was just the periodic
1282                  * interrupt, there was no dangling Rx activity, and no need
1283                  * to extend the periodic interrupt; one-shot is enough.
1284                  */
1285                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1286                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1287                                     CSR_INT_PERIODIC_ENA);
1288
1289                 priv->isr_stats.rx++;
1290         }
1291
1292         /* This "Tx" DMA channel is used only for loading uCode */
1293         if (inta & CSR_INT_BIT_FH_TX) {
1294                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1295                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1296                 priv->isr_stats.tx++;
1297                 handled |= CSR_INT_BIT_FH_TX;
1298                 /* Wake up uCode load routine, now that load is complete */
1299                 priv->ucode_write_complete = 1;
1300                 wake_up_interruptible(&priv->wait_command_queue);
1301         }
1302
1303         if (inta & ~handled) {
1304                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1305                 priv->isr_stats.unhandled++;
1306         }
1307
1308         if (inta & ~(priv->inta_mask)) {
1309                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1310                          inta & ~priv->inta_mask);
1311         }
1312
1313         /* Re-enable all interrupts */
1314         /* only Re-enable if diabled by irq */
1315         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1316                 iwl_enable_interrupts(priv);
1317 }
1318
1319
1320 /******************************************************************************
1321  *
1322  * uCode download functions
1323  *
1324  ******************************************************************************/
1325
1326 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1327 {
1328         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1329         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1330         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1331         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1332         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1333         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1334 }
1335
1336 static void iwl_nic_start(struct iwl_priv *priv)
1337 {
1338         /* Remove all resets to allow NIC to operate */
1339         iwl_write32(priv, CSR_RESET, 0);
1340 }
1341
1342
1343 /**
1344  * iwl_read_ucode - Read uCode images from disk file.
1345  *
1346  * Copy into buffers for card to fetch via bus-mastering
1347  */
1348 static int iwl_read_ucode(struct iwl_priv *priv)
1349 {
1350         struct iwl_ucode_header *ucode;
1351         int ret = -EINVAL, index;
1352         const struct firmware *ucode_raw;
1353         const char *name_pre = priv->cfg->fw_name_pre;
1354         const unsigned int api_max = priv->cfg->ucode_api_max;
1355         const unsigned int api_min = priv->cfg->ucode_api_min;
1356         char buf[25];
1357         u8 *src;
1358         size_t len;
1359         u32 api_ver, build;
1360         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1361         u16 eeprom_ver;
1362
1363         /* Ask kernel firmware_class module to get the boot firmware off disk.
1364          * request_firmware() is synchronous, file is in memory on return. */
1365         for (index = api_max; index >= api_min; index--) {
1366                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1367                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1368                 if (ret < 0) {
1369                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1370                                   buf, ret);
1371                         if (ret == -ENOENT)
1372                                 continue;
1373                         else
1374                                 goto error;
1375                 } else {
1376                         if (index < api_max)
1377                                 IWL_ERR(priv, "Loaded firmware %s, "
1378                                         "which is deprecated. "
1379                                         "Please use API v%u instead.\n",
1380                                           buf, api_max);
1381
1382                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1383                                        buf, ucode_raw->size);
1384                         break;
1385                 }
1386         }
1387
1388         if (ret < 0)
1389                 goto error;
1390
1391         /* Make sure that we got at least the v1 header! */
1392         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1393                 IWL_ERR(priv, "File size way too small!\n");
1394                 ret = -EINVAL;
1395                 goto err_release;
1396         }
1397
1398         /* Data from ucode file:  header followed by uCode images */
1399         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1400
1401         priv->ucode_ver = le32_to_cpu(ucode->ver);
1402         api_ver = IWL_UCODE_API(priv->ucode_ver);
1403         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1404         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1405         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1406         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1407         init_data_size =
1408                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1409         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1410         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1411
1412         /* api_ver should match the api version forming part of the
1413          * firmware filename ... but we don't check for that and only rely
1414          * on the API version read from firmware header from here on forward */
1415
1416         if (api_ver < api_min || api_ver > api_max) {
1417                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1418                           "Driver supports v%u, firmware is v%u.\n",
1419                           api_max, api_ver);
1420                 priv->ucode_ver = 0;
1421                 ret = -EINVAL;
1422                 goto err_release;
1423         }
1424         if (api_ver != api_max)
1425                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1426                           "got v%u. New firmware can be obtained "
1427                           "from http://www.intellinuxwireless.org.\n",
1428                           api_max, api_ver);
1429
1430         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1431                IWL_UCODE_MAJOR(priv->ucode_ver),
1432                IWL_UCODE_MINOR(priv->ucode_ver),
1433                IWL_UCODE_API(priv->ucode_ver),
1434                IWL_UCODE_SERIAL(priv->ucode_ver));
1435
1436         snprintf(priv->hw->wiphy->fw_version,
1437                  sizeof(priv->hw->wiphy->fw_version),
1438                  "%u.%u.%u.%u",
1439                  IWL_UCODE_MAJOR(priv->ucode_ver),
1440                  IWL_UCODE_MINOR(priv->ucode_ver),
1441                  IWL_UCODE_API(priv->ucode_ver),
1442                  IWL_UCODE_SERIAL(priv->ucode_ver));
1443
1444         if (build)
1445                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1446
1447         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1448         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1449                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1450                        ? "OTP" : "EEPROM", eeprom_ver);
1451
1452         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1453                        priv->ucode_ver);
1454         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1455                        inst_size);
1456         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1457                        data_size);
1458         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1459                        init_size);
1460         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1461                        init_data_size);
1462         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1463                        boot_size);
1464
1465         /* Verify size of file vs. image size info in file's header */
1466         if (ucode_raw->size !=
1467                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1468                 inst_size + data_size + init_size +
1469                 init_data_size + boot_size) {
1470
1471                 IWL_DEBUG_INFO(priv,
1472                         "uCode file size %d does not match expected size\n",
1473                         (int)ucode_raw->size);
1474                 ret = -EINVAL;
1475                 goto err_release;
1476         }
1477
1478         /* Verify that uCode images will fit in card's SRAM */
1479         if (inst_size > priv->hw_params.max_inst_size) {
1480                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1481                                inst_size);
1482                 ret = -EINVAL;
1483                 goto err_release;
1484         }
1485
1486         if (data_size > priv->hw_params.max_data_size) {
1487                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1488                                 data_size);
1489                 ret = -EINVAL;
1490                 goto err_release;
1491         }
1492         if (init_size > priv->hw_params.max_inst_size) {
1493                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1494                         init_size);
1495                 ret = -EINVAL;
1496                 goto err_release;
1497         }
1498         if (init_data_size > priv->hw_params.max_data_size) {
1499                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1500                       init_data_size);
1501                 ret = -EINVAL;
1502                 goto err_release;
1503         }
1504         if (boot_size > priv->hw_params.max_bsm_size) {
1505                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1506                         boot_size);
1507                 ret = -EINVAL;
1508                 goto err_release;
1509         }
1510
1511         /* Allocate ucode buffers for card's bus-master loading ... */
1512
1513         /* Runtime instructions and 2 copies of data:
1514          * 1) unmodified from disk
1515          * 2) backup cache for save/restore during power-downs */
1516         priv->ucode_code.len = inst_size;
1517         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1518
1519         priv->ucode_data.len = data_size;
1520         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1521
1522         priv->ucode_data_backup.len = data_size;
1523         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1524
1525         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1526             !priv->ucode_data_backup.v_addr)
1527                 goto err_pci_alloc;
1528
1529         /* Initialization instructions and data */
1530         if (init_size && init_data_size) {
1531                 priv->ucode_init.len = init_size;
1532                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1533
1534                 priv->ucode_init_data.len = init_data_size;
1535                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1536
1537                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1538                         goto err_pci_alloc;
1539         }
1540
1541         /* Bootstrap (instructions only, no data) */
1542         if (boot_size) {
1543                 priv->ucode_boot.len = boot_size;
1544                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1545
1546                 if (!priv->ucode_boot.v_addr)
1547                         goto err_pci_alloc;
1548         }
1549
1550         /* Copy images into buffers for card's bus-master reads ... */
1551
1552         /* Runtime instructions (first block of data in file) */
1553         len = inst_size;
1554         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1555         memcpy(priv->ucode_code.v_addr, src, len);
1556         src += len;
1557
1558         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1559                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1560
1561         /* Runtime data (2nd block)
1562          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1563         len = data_size;
1564         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1565         memcpy(priv->ucode_data.v_addr, src, len);
1566         memcpy(priv->ucode_data_backup.v_addr, src, len);
1567         src += len;
1568
1569         /* Initialization instructions (3rd block) */
1570         if (init_size) {
1571                 len = init_size;
1572                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1573                                 len);
1574                 memcpy(priv->ucode_init.v_addr, src, len);
1575                 src += len;
1576         }
1577
1578         /* Initialization data (4th block) */
1579         if (init_data_size) {
1580                 len = init_data_size;
1581                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1582                                len);
1583                 memcpy(priv->ucode_init_data.v_addr, src, len);
1584                 src += len;
1585         }
1586
1587         /* Bootstrap instructions (5th block) */
1588         len = boot_size;
1589         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1590         memcpy(priv->ucode_boot.v_addr, src, len);
1591
1592         /* We have our copies now, allow OS release its copies */
1593         release_firmware(ucode_raw);
1594         return 0;
1595
1596  err_pci_alloc:
1597         IWL_ERR(priv, "failed to allocate pci memory\n");
1598         ret = -ENOMEM;
1599         iwl_dealloc_ucode_pci(priv);
1600
1601  err_release:
1602         release_firmware(ucode_raw);
1603
1604  error:
1605         return ret;
1606 }
1607
1608 static const char *desc_lookup_text[] = {
1609         "OK",
1610         "FAIL",
1611         "BAD_PARAM",
1612         "BAD_CHECKSUM",
1613         "NMI_INTERRUPT_WDG",
1614         "SYSASSERT",
1615         "FATAL_ERROR",
1616         "BAD_COMMAND",
1617         "HW_ERROR_TUNE_LOCK",
1618         "HW_ERROR_TEMPERATURE",
1619         "ILLEGAL_CHAN_FREQ",
1620         "VCC_NOT_STABLE",
1621         "FH_ERROR",
1622         "NMI_INTERRUPT_HOST",
1623         "NMI_INTERRUPT_ACTION_PT",
1624         "NMI_INTERRUPT_UNKNOWN",
1625         "UCODE_VERSION_MISMATCH",
1626         "HW_ERROR_ABS_LOCK",
1627         "HW_ERROR_CAL_LOCK_FAIL",
1628         "NMI_INTERRUPT_INST_ACTION_PT",
1629         "NMI_INTERRUPT_DATA_ACTION_PT",
1630         "NMI_TRM_HW_ER",
1631         "NMI_INTERRUPT_TRM",
1632         "NMI_INTERRUPT_BREAK_POINT"
1633         "DEBUG_0",
1634         "DEBUG_1",
1635         "DEBUG_2",
1636         "DEBUG_3",
1637         "UNKNOWN"
1638 };
1639
1640 static const char *desc_lookup(int i)
1641 {
1642         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1643
1644         if (i < 0 || i > max)
1645                 i = max;
1646
1647         return desc_lookup_text[i];
1648 }
1649
1650 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1651 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1652
1653 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1654 {
1655         u32 data2, line;
1656         u32 desc, time, count, base, data1;
1657         u32 blink1, blink2, ilink1, ilink2;
1658
1659         if (priv->ucode_type == UCODE_INIT)
1660                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1661         else
1662                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1663
1664         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1665                 IWL_ERR(priv,
1666                         "Not valid error log pointer 0x%08X for %s uCode\n",
1667                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1668                 return;
1669         }
1670
1671         count = iwl_read_targ_mem(priv, base);
1672
1673         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1674                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1675                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1676                         priv->status, count);
1677         }
1678
1679         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1680         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1681         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1682         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1683         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1684         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1685         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1686         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1687         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1688
1689         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1690                                       blink1, blink2, ilink1, ilink2);
1691
1692         IWL_ERR(priv, "Desc                               Time       "
1693                 "data1      data2      line\n");
1694         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1695                 desc_lookup(desc), desc, time, data1, data2, line);
1696         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1697         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1698                 ilink1, ilink2);
1699
1700 }
1701
1702 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1703
1704 /**
1705  * iwl_print_event_log - Dump error event log to syslog
1706  *
1707  */
1708 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1709                                 u32 num_events, u32 mode)
1710 {
1711         u32 i;
1712         u32 base;       /* SRAM byte address of event log header */
1713         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1714         u32 ptr;        /* SRAM byte address of log data */
1715         u32 ev, time, data; /* event log data */
1716         unsigned long reg_flags;
1717
1718         if (num_events == 0)
1719                 return;
1720         if (priv->ucode_type == UCODE_INIT)
1721                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1722         else
1723                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1724
1725         if (mode == 0)
1726                 event_size = 2 * sizeof(u32);
1727         else
1728                 event_size = 3 * sizeof(u32);
1729
1730         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1731
1732         /* Make sure device is powered up for SRAM reads */
1733         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1734         iwl_grab_nic_access(priv);
1735
1736         /* Set starting address; reads will auto-increment */
1737         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1738         rmb();
1739
1740         /* "time" is actually "data" for mode 0 (no timestamp).
1741         * place event id # at far right for easier visual parsing. */
1742         for (i = 0; i < num_events; i++) {
1743                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1744                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1745                 if (mode == 0) {
1746                         /* data, ev */
1747                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1748                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1749                 } else {
1750                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1751                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1752                                         time, data, ev);
1753                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1754                 }
1755         }
1756
1757         /* Allow device to power down */
1758         iwl_release_nic_access(priv);
1759         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1760 }
1761
1762 /**
1763  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1764  */
1765 static void iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1766                                       u32 num_wraps, u32 next_entry,
1767                                       u32 size, u32 mode)
1768 {
1769         /*
1770          * display the newest DEFAULT_LOG_ENTRIES entries
1771          * i.e the entries just before the next ont that uCode would fill.
1772          */
1773         if (num_wraps) {
1774                 if (next_entry < size) {
1775                         iwl_print_event_log(priv,
1776                                         capacity - (size - next_entry),
1777                                         size - next_entry, mode);
1778                         iwl_print_event_log(priv, 0,
1779                                     next_entry, mode);
1780                 } else
1781                         iwl_print_event_log(priv, next_entry - size,
1782                                     size, mode);
1783         } else {
1784                 if (next_entry < size)
1785                         iwl_print_event_log(priv, 0, next_entry, mode);
1786                 else
1787                         iwl_print_event_log(priv, next_entry - size,
1788                                             size, mode);
1789         }
1790 }
1791
1792 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1793 #define MAX_EVENT_LOG_SIZE (512)
1794
1795 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1796
1797 void iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log)
1798 {
1799         u32 base;       /* SRAM byte address of event log header */
1800         u32 capacity;   /* event log capacity in # entries */
1801         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1802         u32 num_wraps;  /* # times uCode wrapped to top of log */
1803         u32 next_entry; /* index of next entry to be written by uCode */
1804         u32 size;       /* # entries that we'll print */
1805
1806         if (priv->ucode_type == UCODE_INIT)
1807                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1808         else
1809                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1810
1811         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1812                 IWL_ERR(priv,
1813                         "Invalid event log pointer 0x%08X for %s uCode\n",
1814                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1815                 return;
1816         }
1817
1818         /* event log header */
1819         capacity = iwl_read_targ_mem(priv, base);
1820         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1821         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1822         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1823
1824         if (capacity > MAX_EVENT_LOG_SIZE) {
1825                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1826                         capacity, MAX_EVENT_LOG_SIZE);
1827                 capacity = MAX_EVENT_LOG_SIZE;
1828         }
1829
1830         if (next_entry > MAX_EVENT_LOG_SIZE) {
1831                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1832                         next_entry, MAX_EVENT_LOG_SIZE);
1833                 next_entry = MAX_EVENT_LOG_SIZE;
1834         }
1835
1836         size = num_wraps ? capacity : next_entry;
1837
1838         /* bail out if nothing in log */
1839         if (size == 0) {
1840                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1841                 return;
1842         }
1843
1844 #ifdef CONFIG_IWLWIFI_DEBUG
1845         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1846                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1847                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1848 #else
1849         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1850                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1851 #endif
1852         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1853                 size);
1854
1855 #ifdef CONFIG_IWLWIFI_DEBUG
1856         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1857                 /*
1858                  * if uCode has wrapped back to top of log,
1859                  * start at the oldest entry,
1860                  * i.e the next one that uCode would fill.
1861                  */
1862                 if (num_wraps)
1863                         iwl_print_event_log(priv, next_entry,
1864                                             capacity - next_entry, mode);
1865                 /* (then/else) start at top of log */
1866                 iwl_print_event_log(priv, 0, next_entry, mode);
1867         } else
1868                 iwl_print_last_event_logs(priv, capacity, num_wraps,
1869                                         next_entry, size, mode);
1870 #else
1871         iwl_print_last_event_logs(priv, capacity, num_wraps,
1872                                 next_entry, size, mode);
1873 #endif
1874 }
1875
1876 /**
1877  * iwl_alive_start - called after REPLY_ALIVE notification received
1878  *                   from protocol/runtime uCode (initialization uCode's
1879  *                   Alive gets handled by iwl_init_alive_start()).
1880  */
1881 static void iwl_alive_start(struct iwl_priv *priv)
1882 {
1883         int ret = 0;
1884
1885         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1886
1887         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1888                 /* We had an error bringing up the hardware, so take it
1889                  * all the way back down so we can try again */
1890                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1891                 goto restart;
1892         }
1893
1894         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1895          * This is a paranoid check, because we would not have gotten the
1896          * "runtime" alive if code weren't properly loaded.  */
1897         if (iwl_verify_ucode(priv)) {
1898                 /* Runtime instruction load was bad;
1899                  * take it all the way back down so we can try again */
1900                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1901                 goto restart;
1902         }
1903
1904         iwl_clear_stations_table(priv);
1905         ret = priv->cfg->ops->lib->alive_notify(priv);
1906         if (ret) {
1907                 IWL_WARN(priv,
1908                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1909                 goto restart;
1910         }
1911
1912         /* After the ALIVE response, we can send host commands to the uCode */
1913         set_bit(STATUS_ALIVE, &priv->status);
1914
1915         if (iwl_is_rfkill(priv))
1916                 return;
1917
1918         ieee80211_wake_queues(priv->hw);
1919
1920         priv->active_rate = priv->rates_mask;
1921         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1922
1923         /* Configure Tx antenna selection based on H/W config */
1924         if (priv->cfg->ops->hcmd->set_tx_ant)
1925                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
1926
1927         if (iwl_is_associated(priv)) {
1928                 struct iwl_rxon_cmd *active_rxon =
1929                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1930                 /* apply any changes in staging */
1931                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1932                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1933         } else {
1934                 /* Initialize our rx_config data */
1935                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1936
1937                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1938                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1939
1940                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1941         }
1942
1943         /* Configure Bluetooth device coexistence support */
1944         iwl_send_bt_config(priv);
1945
1946         iwl_reset_run_time_calib(priv);
1947
1948         /* Configure the adapter for unassociated operation */
1949         iwlcore_commit_rxon(priv);
1950
1951         /* At this point, the NIC is initialized and operational */
1952         iwl_rf_kill_ct_config(priv);
1953
1954         iwl_leds_init(priv);
1955
1956         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1957         set_bit(STATUS_READY, &priv->status);
1958         wake_up_interruptible(&priv->wait_command_queue);
1959
1960         iwl_power_update_mode(priv, true);
1961
1962         /* reassociate for ADHOC mode */
1963         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1964                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1965                                                                 priv->vif);
1966                 if (beacon)
1967                         iwl_mac_beacon_update(priv->hw, beacon);
1968         }
1969
1970
1971         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1972                 iwl_set_mode(priv, priv->iw_mode);
1973
1974         return;
1975
1976  restart:
1977         queue_work(priv->workqueue, &priv->restart);
1978 }
1979
1980 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1981
1982 static void __iwl_down(struct iwl_priv *priv)
1983 {
1984         unsigned long flags;
1985         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1986
1987         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1988
1989         if (!exit_pending)
1990                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1991
1992         iwl_clear_stations_table(priv);
1993
1994         /* Unblock any waiting calls */
1995         wake_up_interruptible_all(&priv->wait_command_queue);
1996
1997         /* Wipe out the EXIT_PENDING status bit if we are not actually
1998          * exiting the module */
1999         if (!exit_pending)
2000                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2001
2002         /* stop and reset the on-board processor */
2003         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2004
2005         /* tell the device to stop sending interrupts */
2006         spin_lock_irqsave(&priv->lock, flags);
2007         iwl_disable_interrupts(priv);
2008         spin_unlock_irqrestore(&priv->lock, flags);
2009         iwl_synchronize_irq(priv);
2010
2011         if (priv->mac80211_registered)
2012                 ieee80211_stop_queues(priv->hw);
2013
2014         /* If we have not previously called iwl_init() then
2015          * clear all bits but the RF Kill bit and return */
2016         if (!iwl_is_init(priv)) {
2017                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2018                                         STATUS_RF_KILL_HW |
2019                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2020                                         STATUS_GEO_CONFIGURED |
2021                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2022                                         STATUS_EXIT_PENDING;
2023                 goto exit;
2024         }
2025
2026         /* ...otherwise clear out all the status bits but the RF Kill
2027          * bit and continue taking the NIC down. */
2028         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2029                                 STATUS_RF_KILL_HW |
2030                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2031                                 STATUS_GEO_CONFIGURED |
2032                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2033                                 STATUS_FW_ERROR |
2034                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2035                                 STATUS_EXIT_PENDING;
2036
2037         /* device going down, Stop using ICT table */
2038         iwl_disable_ict(priv);
2039
2040         iwl_txq_ctx_stop(priv);
2041         iwl_rxq_stop(priv);
2042
2043         /* Power-down device's busmaster DMA clocks */
2044         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2045         udelay(5);
2046
2047         /* Make sure (redundant) we've released our request to stay awake */
2048         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2049
2050         /* Stop the device, and put it in low power state */
2051         priv->cfg->ops->lib->apm_ops.stop(priv);
2052
2053  exit:
2054         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2055
2056         if (priv->ibss_beacon)
2057                 dev_kfree_skb(priv->ibss_beacon);
2058         priv->ibss_beacon = NULL;
2059
2060         /* clear out any free frames */
2061         iwl_clear_free_frames(priv);
2062 }
2063
2064 static void iwl_down(struct iwl_priv *priv)
2065 {
2066         mutex_lock(&priv->mutex);
2067         __iwl_down(priv);
2068         mutex_unlock(&priv->mutex);
2069
2070         iwl_cancel_deferred_work(priv);
2071 }
2072
2073 #define HW_READY_TIMEOUT (50)
2074
2075 static int iwl_set_hw_ready(struct iwl_priv *priv)
2076 {
2077         int ret = 0;
2078
2079         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2080                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2081
2082         /* See if we got it */
2083         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2084                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2085                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2086                                 HW_READY_TIMEOUT);
2087         if (ret != -ETIMEDOUT)
2088                 priv->hw_ready = true;
2089         else
2090                 priv->hw_ready = false;
2091
2092         IWL_DEBUG_INFO(priv, "hardware %s\n",
2093                       (priv->hw_ready == 1) ? "ready" : "not ready");
2094         return ret;
2095 }
2096
2097 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2098 {
2099         int ret = 0;
2100
2101         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2102
2103         ret = iwl_set_hw_ready(priv);
2104         if (priv->hw_ready)
2105                 return ret;
2106
2107         /* If HW is not ready, prepare the conditions to check again */
2108         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2109                         CSR_HW_IF_CONFIG_REG_PREPARE);
2110
2111         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2112                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2113                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2114
2115         /* HW should be ready by now, check again. */
2116         if (ret != -ETIMEDOUT)
2117                 iwl_set_hw_ready(priv);
2118
2119         return ret;
2120 }
2121
2122 #define MAX_HW_RESTARTS 5
2123
2124 static int __iwl_up(struct iwl_priv *priv)
2125 {
2126         int i;
2127         int ret;
2128
2129         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2130                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2131                 return -EIO;
2132         }
2133
2134         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2135                 IWL_ERR(priv, "ucode not available for device bringup\n");
2136                 return -EIO;
2137         }
2138
2139         iwl_prepare_card_hw(priv);
2140
2141         if (!priv->hw_ready) {
2142                 IWL_WARN(priv, "Exit HW not ready\n");
2143                 return -EIO;
2144         }
2145
2146         /* If platform's RF_KILL switch is NOT set to KILL */
2147         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2148                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2149         else
2150                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2151
2152         if (iwl_is_rfkill(priv)) {
2153                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2154
2155                 iwl_enable_interrupts(priv);
2156                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2157                 return 0;
2158         }
2159
2160         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2161
2162         ret = iwl_hw_nic_init(priv);
2163         if (ret) {
2164                 IWL_ERR(priv, "Unable to init nic\n");
2165                 return ret;
2166         }
2167
2168         /* make sure rfkill handshake bits are cleared */
2169         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2170         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2171                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2172
2173         /* clear (again), then enable host interrupts */
2174         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2175         iwl_enable_interrupts(priv);
2176
2177         /* really make sure rfkill handshake bits are cleared */
2178         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2179         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2180
2181         /* Copy original ucode data image from disk into backup cache.
2182          * This will be used to initialize the on-board processor's
2183          * data SRAM for a clean start when the runtime program first loads. */
2184         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2185                priv->ucode_data.len);
2186
2187         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2188
2189                 iwl_clear_stations_table(priv);
2190
2191                 /* load bootstrap state machine,
2192                  * load bootstrap program into processor's memory,
2193                  * prepare to load the "initialize" uCode */
2194                 ret = priv->cfg->ops->lib->load_ucode(priv);
2195
2196                 if (ret) {
2197                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2198                                 ret);
2199                         continue;
2200                 }
2201
2202                 /* start card; "initialize" will load runtime ucode */
2203                 iwl_nic_start(priv);
2204
2205                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2206
2207                 return 0;
2208         }
2209
2210         set_bit(STATUS_EXIT_PENDING, &priv->status);
2211         __iwl_down(priv);
2212         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2213
2214         /* tried to restart and config the device for as long as our
2215          * patience could withstand */
2216         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2217         return -EIO;
2218 }
2219
2220
2221 /*****************************************************************************
2222  *
2223  * Workqueue callbacks
2224  *
2225  *****************************************************************************/
2226
2227 static void iwl_bg_init_alive_start(struct work_struct *data)
2228 {
2229         struct iwl_priv *priv =
2230             container_of(data, struct iwl_priv, init_alive_start.work);
2231
2232         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2233                 return;
2234
2235         mutex_lock(&priv->mutex);
2236         priv->cfg->ops->lib->init_alive_start(priv);
2237         mutex_unlock(&priv->mutex);
2238 }
2239
2240 static void iwl_bg_alive_start(struct work_struct *data)
2241 {
2242         struct iwl_priv *priv =
2243             container_of(data, struct iwl_priv, alive_start.work);
2244
2245         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2246                 return;
2247
2248         /* enable dram interrupt */
2249         iwl_reset_ict(priv);
2250
2251         mutex_lock(&priv->mutex);
2252         iwl_alive_start(priv);
2253         mutex_unlock(&priv->mutex);
2254 }
2255
2256 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2257 {
2258         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2259                         run_time_calib_work);
2260
2261         mutex_lock(&priv->mutex);
2262
2263         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2264             test_bit(STATUS_SCANNING, &priv->status)) {
2265                 mutex_unlock(&priv->mutex);
2266                 return;
2267         }
2268
2269         if (priv->start_calib) {
2270                 iwl_chain_noise_calibration(priv, &priv->statistics);
2271
2272                 iwl_sensitivity_calibration(priv, &priv->statistics);
2273         }
2274
2275         mutex_unlock(&priv->mutex);
2276         return;
2277 }
2278
2279 static void iwl_bg_up(struct work_struct *data)
2280 {
2281         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2282
2283         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2284                 return;
2285
2286         mutex_lock(&priv->mutex);
2287         __iwl_up(priv);
2288         mutex_unlock(&priv->mutex);
2289 }
2290
2291 static void iwl_bg_restart(struct work_struct *data)
2292 {
2293         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2294
2295         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2296                 return;
2297
2298         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2299                 mutex_lock(&priv->mutex);
2300                 priv->vif = NULL;
2301                 priv->is_open = 0;
2302                 mutex_unlock(&priv->mutex);
2303                 iwl_down(priv);
2304                 ieee80211_restart_hw(priv->hw);
2305         } else {
2306                 iwl_down(priv);
2307                 queue_work(priv->workqueue, &priv->up);
2308         }
2309 }
2310
2311 static void iwl_bg_rx_replenish(struct work_struct *data)
2312 {
2313         struct iwl_priv *priv =
2314             container_of(data, struct iwl_priv, rx_replenish);
2315
2316         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2317                 return;
2318
2319         mutex_lock(&priv->mutex);
2320         iwl_rx_replenish(priv);
2321         mutex_unlock(&priv->mutex);
2322 }
2323
2324 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2325
2326 void iwl_post_associate(struct iwl_priv *priv)
2327 {
2328         struct ieee80211_conf *conf = NULL;
2329         int ret = 0;
2330         unsigned long flags;
2331
2332         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2333                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2334                 return;
2335         }
2336
2337         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2338                         priv->assoc_id, priv->active_rxon.bssid_addr);
2339
2340
2341         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2342                 return;
2343
2344
2345         if (!priv->vif || !priv->is_open)
2346                 return;
2347
2348         iwl_scan_cancel_timeout(priv, 200);
2349
2350         conf = ieee80211_get_hw_conf(priv->hw);
2351
2352         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2353         iwlcore_commit_rxon(priv);
2354
2355         iwl_setup_rxon_timing(priv);
2356         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2357                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2358         if (ret)
2359                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2360                             "Attempting to continue.\n");
2361
2362         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2363
2364         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2365
2366         if (priv->cfg->ops->hcmd->set_rxon_chain)
2367                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2368
2369         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2370
2371         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2372                         priv->assoc_id, priv->beacon_int);
2373
2374         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2375                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2376         else
2377                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2378
2379         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2380                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2381                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2382                 else
2383                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2384
2385                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2386                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2387
2388         }
2389
2390         iwlcore_commit_rxon(priv);
2391
2392         switch (priv->iw_mode) {
2393         case NL80211_IFTYPE_STATION:
2394                 break;
2395
2396         case NL80211_IFTYPE_ADHOC:
2397
2398                 /* assume default assoc id */
2399                 priv->assoc_id = 1;
2400
2401                 iwl_rxon_add_station(priv, priv->bssid, 0);
2402                 iwl_send_beacon_cmd(priv);
2403
2404                 break;
2405
2406         default:
2407                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2408                           __func__, priv->iw_mode);
2409                 break;
2410         }
2411
2412         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2413                 priv->assoc_station_added = 1;
2414
2415         spin_lock_irqsave(&priv->lock, flags);
2416         iwl_activate_qos(priv, 0);
2417         spin_unlock_irqrestore(&priv->lock, flags);
2418
2419         /* the chain noise calibration will enabled PM upon completion
2420          * If chain noise has already been run, then we need to enable
2421          * power management here */
2422         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2423                 iwl_power_update_mode(priv, false);
2424
2425         /* Enable Rx differential gain and sensitivity calibrations */
2426         iwl_chain_noise_reset(priv);
2427         priv->start_calib = 1;
2428
2429 }
2430
2431 /*****************************************************************************
2432  *
2433  * mac80211 entry point functions
2434  *
2435  *****************************************************************************/
2436
2437 #define UCODE_READY_TIMEOUT     (4 * HZ)
2438
2439 /*
2440  * Not a mac80211 entry point function, but it fits in with all the
2441  * other mac80211 functions grouped here.
2442  */
2443 static int iwl_setup_mac(struct iwl_priv *priv)
2444 {
2445         int ret;
2446         struct ieee80211_hw *hw = priv->hw;
2447         hw->rate_control_algorithm = "iwl-agn-rs";
2448
2449         /* Tell mac80211 our characteristics */
2450         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2451                     IEEE80211_HW_NOISE_DBM |
2452                     IEEE80211_HW_AMPDU_AGGREGATION |
2453                     IEEE80211_HW_SPECTRUM_MGMT;
2454
2455         if (!priv->cfg->broken_powersave)
2456                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2457                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2458
2459         hw->sta_data_size = sizeof(struct iwl_station_priv);
2460         hw->wiphy->interface_modes =
2461                 BIT(NL80211_IFTYPE_STATION) |
2462                 BIT(NL80211_IFTYPE_ADHOC);
2463
2464         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
2465                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
2466
2467         /*
2468          * For now, disable PS by default because it affects
2469          * RX performance significantly.
2470          */
2471         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2472
2473         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2474         /* we create the 802.11 header and a zero-length SSID element */
2475         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2476
2477         /* Default value; 4 EDCA QOS priorities */
2478         hw->queues = 4;
2479
2480         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2481
2482         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2483                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2484                         &priv->bands[IEEE80211_BAND_2GHZ];
2485         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2486                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2487                         &priv->bands[IEEE80211_BAND_5GHZ];
2488
2489         ret = ieee80211_register_hw(priv->hw);
2490         if (ret) {
2491                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2492                 return ret;
2493         }
2494         priv->mac80211_registered = 1;
2495
2496         return 0;
2497 }
2498
2499
2500 static int iwl_mac_start(struct ieee80211_hw *hw)
2501 {
2502         struct iwl_priv *priv = hw->priv;
2503         int ret;
2504
2505         IWL_DEBUG_MAC80211(priv, "enter\n");
2506
2507         /* we should be verifying the device is ready to be opened */
2508         mutex_lock(&priv->mutex);
2509
2510         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2511          * ucode filename and max sizes are card-specific. */
2512
2513         if (!priv->ucode_code.len) {
2514                 ret = iwl_read_ucode(priv);
2515                 if (ret) {
2516                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2517                         mutex_unlock(&priv->mutex);
2518                         return ret;
2519                 }
2520         }
2521
2522         ret = __iwl_up(priv);
2523
2524         mutex_unlock(&priv->mutex);
2525
2526         if (ret)
2527                 return ret;
2528
2529         if (iwl_is_rfkill(priv))
2530                 goto out;
2531
2532         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2533
2534         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2535          * mac80211 will not be run successfully. */
2536         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2537                         test_bit(STATUS_READY, &priv->status),
2538                         UCODE_READY_TIMEOUT);
2539         if (!ret) {
2540                 if (!test_bit(STATUS_READY, &priv->status)) {
2541                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2542                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2543                         return -ETIMEDOUT;
2544                 }
2545         }
2546
2547         iwl_led_start(priv);
2548
2549 out:
2550         priv->is_open = 1;
2551         IWL_DEBUG_MAC80211(priv, "leave\n");
2552         return 0;
2553 }
2554
2555 static void iwl_mac_stop(struct ieee80211_hw *hw)
2556 {
2557         struct iwl_priv *priv = hw->priv;
2558
2559         IWL_DEBUG_MAC80211(priv, "enter\n");
2560
2561         if (!priv->is_open)
2562                 return;
2563
2564         priv->is_open = 0;
2565
2566         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2567                 /* stop mac, cancel any scan request and clear
2568                  * RXON_FILTER_ASSOC_MSK BIT
2569                  */
2570                 mutex_lock(&priv->mutex);
2571                 iwl_scan_cancel_timeout(priv, 100);
2572                 mutex_unlock(&priv->mutex);
2573         }
2574
2575         iwl_down(priv);
2576
2577         flush_workqueue(priv->workqueue);
2578
2579         /* enable interrupts again in order to receive rfkill changes */
2580         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2581         iwl_enable_interrupts(priv);
2582
2583         IWL_DEBUG_MAC80211(priv, "leave\n");
2584 }
2585
2586 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2587 {
2588         struct iwl_priv *priv = hw->priv;
2589
2590         IWL_DEBUG_MACDUMP(priv, "enter\n");
2591
2592         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2593                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2594
2595         if (iwl_tx_skb(priv, skb))
2596                 dev_kfree_skb_any(skb);
2597
2598         IWL_DEBUG_MACDUMP(priv, "leave\n");
2599         return NETDEV_TX_OK;
2600 }
2601
2602 void iwl_config_ap(struct iwl_priv *priv)
2603 {
2604         int ret = 0;
2605         unsigned long flags;
2606
2607         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2608                 return;
2609
2610         /* The following should be done only at AP bring up */
2611         if (!iwl_is_associated(priv)) {
2612
2613                 /* RXON - unassoc (to set timing command) */
2614                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2615                 iwlcore_commit_rxon(priv);
2616
2617                 /* RXON Timing */
2618                 iwl_setup_rxon_timing(priv);
2619                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2620                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2621                 if (ret)
2622                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2623                                         "Attempting to continue.\n");
2624
2625                 /* AP has all antennas */
2626                 priv->chain_noise_data.active_chains =
2627                         priv->hw_params.valid_rx_ant;
2628                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2629                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2630                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2631
2632                 /* FIXME: what should be the assoc_id for AP? */
2633                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2634                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2635                         priv->staging_rxon.flags |=
2636                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2637                 else
2638                         priv->staging_rxon.flags &=
2639                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2640
2641                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2642                         if (priv->assoc_capability &
2643                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2644                                 priv->staging_rxon.flags |=
2645                                         RXON_FLG_SHORT_SLOT_MSK;
2646                         else
2647                                 priv->staging_rxon.flags &=
2648                                         ~RXON_FLG_SHORT_SLOT_MSK;
2649
2650                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2651                                 priv->staging_rxon.flags &=
2652                                         ~RXON_FLG_SHORT_SLOT_MSK;
2653                 }
2654                 /* restore RXON assoc */
2655                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2656                 iwlcore_commit_rxon(priv);
2657                 iwl_reset_qos(priv);
2658                 spin_lock_irqsave(&priv->lock, flags);
2659                 iwl_activate_qos(priv, 1);
2660                 spin_unlock_irqrestore(&priv->lock, flags);
2661                 iwl_add_bcast_station(priv);
2662         }
2663         iwl_send_beacon_cmd(priv);
2664
2665         /* FIXME - we need to add code here to detect a totally new
2666          * configuration, reset the AP, unassoc, rxon timing, assoc,
2667          * clear sta table, add BCAST sta... */
2668 }
2669
2670 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2671                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2672                         u32 iv32, u16 *phase1key)
2673 {
2674
2675         struct iwl_priv *priv = hw->priv;
2676         IWL_DEBUG_MAC80211(priv, "enter\n");
2677
2678         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2679
2680         IWL_DEBUG_MAC80211(priv, "leave\n");
2681 }
2682
2683 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2684                            struct ieee80211_vif *vif,
2685                            struct ieee80211_sta *sta,
2686                            struct ieee80211_key_conf *key)
2687 {
2688         struct iwl_priv *priv = hw->priv;
2689         const u8 *addr;
2690         int ret;
2691         u8 sta_id;
2692         bool is_default_wep_key = false;
2693
2694         IWL_DEBUG_MAC80211(priv, "enter\n");
2695
2696         if (priv->cfg->mod_params->sw_crypto) {
2697                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2698                 return -EOPNOTSUPP;
2699         }
2700         addr = sta ? sta->addr : iwl_bcast_addr;
2701         sta_id = iwl_find_station(priv, addr);
2702         if (sta_id == IWL_INVALID_STATION) {
2703                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2704                                    addr);
2705                 return -EINVAL;
2706
2707         }
2708
2709         mutex_lock(&priv->mutex);
2710         iwl_scan_cancel_timeout(priv, 100);
2711         mutex_unlock(&priv->mutex);
2712
2713         /* If we are getting WEP group key and we didn't receive any key mapping
2714          * so far, we are in legacy wep mode (group key only), otherwise we are
2715          * in 1X mode.
2716          * In legacy wep mode, we use another host command to the uCode */
2717         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2718                 priv->iw_mode != NL80211_IFTYPE_AP) {
2719                 if (cmd == SET_KEY)
2720                         is_default_wep_key = !priv->key_mapping_key;
2721                 else
2722                         is_default_wep_key =
2723                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2724         }
2725
2726         switch (cmd) {
2727         case SET_KEY:
2728                 if (is_default_wep_key)
2729                         ret = iwl_set_default_wep_key(priv, key);
2730                 else
2731                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2732
2733                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2734                 break;
2735         case DISABLE_KEY:
2736                 if (is_default_wep_key)
2737                         ret = iwl_remove_default_wep_key(priv, key);
2738                 else
2739                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2740
2741                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2742                 break;
2743         default:
2744                 ret = -EINVAL;
2745         }
2746
2747         IWL_DEBUG_MAC80211(priv, "leave\n");
2748
2749         return ret;
2750 }
2751
2752 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2753                                 struct ieee80211_vif *vif,
2754                              enum ieee80211_ampdu_mlme_action action,
2755                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2756 {
2757         struct iwl_priv *priv = hw->priv;
2758         int ret;
2759
2760         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2761                      sta->addr, tid);
2762
2763         if (!(priv->cfg->sku & IWL_SKU_N))
2764                 return -EACCES;
2765
2766         switch (action) {
2767         case IEEE80211_AMPDU_RX_START:
2768                 IWL_DEBUG_HT(priv, "start Rx\n");
2769                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2770         case IEEE80211_AMPDU_RX_STOP:
2771                 IWL_DEBUG_HT(priv, "stop Rx\n");
2772                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2773                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2774                         return 0;
2775                 else
2776                         return ret;
2777         case IEEE80211_AMPDU_TX_START:
2778                 IWL_DEBUG_HT(priv, "start Tx\n");
2779                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2780         case IEEE80211_AMPDU_TX_STOP:
2781                 IWL_DEBUG_HT(priv, "stop Tx\n");
2782                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2783                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2784                         return 0;
2785                 else
2786                         return ret;
2787         default:
2788                 IWL_DEBUG_HT(priv, "unknown\n");
2789                 return -EINVAL;
2790                 break;
2791         }
2792         return 0;
2793 }
2794
2795 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2796                              struct ieee80211_low_level_stats *stats)
2797 {
2798         struct iwl_priv *priv = hw->priv;
2799
2800         priv = hw->priv;
2801         IWL_DEBUG_MAC80211(priv, "enter\n");
2802         IWL_DEBUG_MAC80211(priv, "leave\n");
2803
2804         return 0;
2805 }
2806
2807 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2808                                struct ieee80211_vif *vif,
2809                                enum sta_notify_cmd cmd,
2810                                struct ieee80211_sta *sta)
2811 {
2812         struct iwl_priv *priv = hw->priv;
2813         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2814         int sta_id;
2815
2816         /*
2817          * TODO: We really should use this callback to
2818          *       actually maintain the station table in
2819          *       the device.
2820          */
2821
2822         switch (cmd) {
2823         case STA_NOTIFY_ADD:
2824                 atomic_set(&sta_priv->pending_frames, 0);
2825                 if (vif->type == NL80211_IFTYPE_AP)
2826                         sta_priv->client = true;
2827                 break;
2828         case STA_NOTIFY_SLEEP:
2829                 WARN_ON(!sta_priv->client);
2830                 sta_priv->asleep = true;
2831                 if (atomic_read(&sta_priv->pending_frames) > 0)
2832                         ieee80211_sta_block_awake(hw, sta, true);
2833                 break;
2834         case STA_NOTIFY_AWAKE:
2835                 WARN_ON(!sta_priv->client);
2836                 sta_priv->asleep = false;
2837                 sta_id = iwl_find_station(priv, sta->addr);
2838                 if (sta_id != IWL_INVALID_STATION)
2839                         iwl_sta_modify_ps_wake(priv, sta_id);
2840                 break;
2841         default:
2842                 break;
2843         }
2844 }
2845
2846 /*****************************************************************************
2847  *
2848  * sysfs attributes
2849  *
2850  *****************************************************************************/
2851
2852 #ifdef CONFIG_IWLWIFI_DEBUG
2853
2854 /*
2855  * The following adds a new attribute to the sysfs representation
2856  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2857  * used for controlling the debug level.
2858  *
2859  * See the level definitions in iwl for details.
2860  *
2861  * The debug_level being managed using sysfs below is a per device debug
2862  * level that is used instead of the global debug level if it (the per
2863  * device debug level) is set.
2864  */
2865 static ssize_t show_debug_level(struct device *d,
2866                                 struct device_attribute *attr, char *buf)
2867 {
2868         struct iwl_priv *priv = dev_get_drvdata(d);
2869         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
2870 }
2871 static ssize_t store_debug_level(struct device *d,
2872                                 struct device_attribute *attr,
2873                                  const char *buf, size_t count)
2874 {
2875         struct iwl_priv *priv = dev_get_drvdata(d);
2876         unsigned long val;
2877         int ret;
2878
2879         ret = strict_strtoul(buf, 0, &val);
2880         if (ret)
2881                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2882         else {
2883                 priv->debug_level = val;
2884                 if (iwl_alloc_traffic_mem(priv))
2885                         IWL_ERR(priv,
2886                                 "Not enough memory to generate traffic log\n");
2887         }
2888         return strnlen(buf, count);
2889 }
2890
2891 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2892                         show_debug_level, store_debug_level);
2893
2894
2895 #endif /* CONFIG_IWLWIFI_DEBUG */
2896
2897
2898 static ssize_t show_temperature(struct device *d,
2899                                 struct device_attribute *attr, char *buf)
2900 {
2901         struct iwl_priv *priv = dev_get_drvdata(d);
2902
2903         if (!iwl_is_alive(priv))
2904                 return -EAGAIN;
2905
2906         return sprintf(buf, "%d\n", priv->temperature);
2907 }
2908
2909 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2910
2911 static ssize_t show_tx_power(struct device *d,
2912                              struct device_attribute *attr, char *buf)
2913 {
2914         struct iwl_priv *priv = dev_get_drvdata(d);
2915
2916         if (!iwl_is_ready_rf(priv))
2917                 return sprintf(buf, "off\n");
2918         else
2919                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2920 }
2921
2922 static ssize_t store_tx_power(struct device *d,
2923                               struct device_attribute *attr,
2924                               const char *buf, size_t count)
2925 {
2926         struct iwl_priv *priv = dev_get_drvdata(d);
2927         unsigned long val;
2928         int ret;
2929
2930         ret = strict_strtoul(buf, 10, &val);
2931         if (ret)
2932                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2933         else {
2934                 ret = iwl_set_tx_power(priv, val, false);
2935                 if (ret)
2936                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
2937                                 ret);
2938                 else
2939                         ret = count;
2940         }
2941         return ret;
2942 }
2943
2944 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2945
2946 static ssize_t show_flags(struct device *d,
2947                           struct device_attribute *attr, char *buf)
2948 {
2949         struct iwl_priv *priv = dev_get_drvdata(d);
2950
2951         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2952 }
2953
2954 static ssize_t store_flags(struct device *d,
2955                            struct device_attribute *attr,
2956                            const char *buf, size_t count)
2957 {
2958         struct iwl_priv *priv = dev_get_drvdata(d);
2959         unsigned long val;
2960         u32 flags;
2961         int ret = strict_strtoul(buf, 0, &val);
2962         if (ret)
2963                 return ret;
2964         flags = (u32)val;
2965
2966         mutex_lock(&priv->mutex);
2967         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2968                 /* Cancel any currently running scans... */
2969                 if (iwl_scan_cancel_timeout(priv, 100))
2970                         IWL_WARN(priv, "Could not cancel scan.\n");
2971                 else {
2972                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2973                         priv->staging_rxon.flags = cpu_to_le32(flags);
2974                         iwlcore_commit_rxon(priv);
2975                 }
2976         }
2977         mutex_unlock(&priv->mutex);
2978
2979         return count;
2980 }
2981
2982 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2983
2984 static ssize_t show_filter_flags(struct device *d,
2985                                  struct device_attribute *attr, char *buf)
2986 {
2987         struct iwl_priv *priv = dev_get_drvdata(d);
2988
2989         return sprintf(buf, "0x%04X\n",
2990                 le32_to_cpu(priv->active_rxon.filter_flags));
2991 }
2992
2993 static ssize_t store_filter_flags(struct device *d,
2994                                   struct device_attribute *attr,
2995                                   const char *buf, size_t count)
2996 {
2997         struct iwl_priv *priv = dev_get_drvdata(d);
2998         unsigned long val;
2999         u32 filter_flags;
3000         int ret = strict_strtoul(buf, 0, &val);
3001         if (ret)
3002                 return ret;
3003         filter_flags = (u32)val;
3004
3005         mutex_lock(&priv->mutex);
3006         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3007                 /* Cancel any currently running scans... */
3008                 if (iwl_scan_cancel_timeout(priv, 100))
3009                         IWL_WARN(priv, "Could not cancel scan.\n");
3010                 else {
3011                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3012                                        "0x%04X\n", filter_flags);
3013                         priv->staging_rxon.filter_flags =
3014                                 cpu_to_le32(filter_flags);
3015                         iwlcore_commit_rxon(priv);
3016                 }
3017         }
3018         mutex_unlock(&priv->mutex);
3019
3020         return count;
3021 }
3022
3023 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3024                    store_filter_flags);
3025
3026
3027 static ssize_t show_statistics(struct device *d,
3028                                struct device_attribute *attr, char *buf)
3029 {
3030         struct iwl_priv *priv = dev_get_drvdata(d);
3031         u32 size = sizeof(struct iwl_notif_statistics);
3032         u32 len = 0, ofs = 0;
3033         u8 *data = (u8 *)&priv->statistics;
3034         int rc = 0;
3035
3036         if (!iwl_is_alive(priv))
3037                 return -EAGAIN;
3038
3039         mutex_lock(&priv->mutex);
3040         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3041         mutex_unlock(&priv->mutex);
3042
3043         if (rc) {
3044                 len = sprintf(buf,
3045                               "Error sending statistics request: 0x%08X\n", rc);
3046                 return len;
3047         }
3048
3049         while (size && (PAGE_SIZE - len)) {
3050                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3051                                    PAGE_SIZE - len, 1);
3052                 len = strlen(buf);
3053                 if (PAGE_SIZE - len)
3054                         buf[len++] = '\n';
3055
3056                 ofs += 16;
3057                 size -= min(size, 16U);
3058         }
3059
3060         return len;
3061 }
3062
3063 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3064
3065 static ssize_t show_rts_ht_protection(struct device *d,
3066                              struct device_attribute *attr, char *buf)
3067 {
3068         struct iwl_priv *priv = dev_get_drvdata(d);
3069
3070         return sprintf(buf, "%s\n",
3071                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3072 }
3073
3074 static ssize_t store_rts_ht_protection(struct device *d,
3075                               struct device_attribute *attr,
3076                               const char *buf, size_t count)
3077 {
3078         struct iwl_priv *priv = dev_get_drvdata(d);
3079         unsigned long val;
3080         int ret;
3081
3082         ret = strict_strtoul(buf, 10, &val);
3083         if (ret)
3084                 IWL_INFO(priv, "Input is not in decimal form.\n");
3085         else {
3086                 if (!iwl_is_associated(priv))
3087                         priv->cfg->use_rts_for_ht = val ? true : false;
3088                 else
3089                         IWL_ERR(priv, "Sta associated with AP - "
3090                                 "Change protection mechanism is not allowed\n");
3091                 ret = count;
3092         }
3093         return ret;
3094 }
3095
3096 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3097                         show_rts_ht_protection, store_rts_ht_protection);
3098
3099
3100 /*****************************************************************************
3101  *
3102  * driver setup and teardown
3103  *
3104  *****************************************************************************/
3105
3106 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3107 {
3108         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3109
3110         init_waitqueue_head(&priv->wait_command_queue);
3111
3112         INIT_WORK(&priv->up, iwl_bg_up);
3113         INIT_WORK(&priv->restart, iwl_bg_restart);
3114         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3115         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3116         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3117         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3118         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3119
3120         iwl_setup_scan_deferred_work(priv);
3121
3122         if (priv->cfg->ops->lib->setup_deferred_work)
3123                 priv->cfg->ops->lib->setup_deferred_work(priv);
3124
3125         init_timer(&priv->statistics_periodic);
3126         priv->statistics_periodic.data = (unsigned long)priv;
3127         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3128
3129         if (!priv->cfg->use_isr_legacy)
3130                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3131                         iwl_irq_tasklet, (unsigned long)priv);
3132         else
3133                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3134                         iwl_irq_tasklet_legacy, (unsigned long)priv);
3135 }
3136
3137 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3138 {
3139         if (priv->cfg->ops->lib->cancel_deferred_work)
3140                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3141
3142         cancel_delayed_work_sync(&priv->init_alive_start);
3143         cancel_delayed_work(&priv->scan_check);
3144         cancel_delayed_work(&priv->alive_start);
3145         cancel_work_sync(&priv->beacon_update);
3146         del_timer_sync(&priv->statistics_periodic);
3147 }
3148
3149 static void iwl_init_hw_rates(struct iwl_priv *priv,
3150                               struct ieee80211_rate *rates)
3151 {
3152         int i;
3153
3154         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3155                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3156                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3157                 rates[i].hw_value_short = i;
3158                 rates[i].flags = 0;
3159                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3160                         /*
3161                          * If CCK != 1M then set short preamble rate flag.
3162                          */
3163                         rates[i].flags |=
3164                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3165                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3166                 }
3167         }
3168 }
3169
3170 static int iwl_init_drv(struct iwl_priv *priv)
3171 {
3172         int ret;
3173
3174         priv->ibss_beacon = NULL;
3175
3176         spin_lock_init(&priv->sta_lock);
3177         spin_lock_init(&priv->hcmd_lock);
3178
3179         INIT_LIST_HEAD(&priv->free_frames);
3180
3181         mutex_init(&priv->mutex);
3182
3183         /* Clear the driver's (not device's) station table */
3184         iwl_clear_stations_table(priv);
3185
3186         priv->ieee_channels = NULL;
3187         priv->ieee_rates = NULL;
3188         priv->band = IEEE80211_BAND_2GHZ;
3189
3190         priv->iw_mode = NL80211_IFTYPE_STATION;
3191
3192         /* Choose which receivers/antennas to use */
3193         if (priv->cfg->ops->hcmd->set_rxon_chain)
3194                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3195
3196         iwl_init_scan_params(priv);
3197
3198         iwl_reset_qos(priv);
3199
3200         priv->qos_data.qos_active = 0;
3201         priv->qos_data.qos_cap.val = 0;
3202
3203         priv->rates_mask = IWL_RATES_MASK;
3204         /* Set the tx_power_user_lmt to the lowest power level
3205          * this value will get overwritten by channel max power avg
3206          * from eeprom */
3207         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
3208
3209         ret = iwl_init_channel_map(priv);
3210         if (ret) {
3211                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3212                 goto err;
3213         }
3214
3215         ret = iwlcore_init_geos(priv);
3216         if (ret) {
3217                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3218                 goto err_free_channel_map;
3219         }
3220         iwl_init_hw_rates(priv, priv->ieee_rates);
3221
3222         return 0;
3223
3224 err_free_channel_map:
3225         iwl_free_channel_map(priv);
3226 err:
3227         return ret;
3228 }
3229
3230 static void iwl_uninit_drv(struct iwl_priv *priv)
3231 {
3232         iwl_calib_free_results(priv);
3233         iwlcore_free_geos(priv);
3234         iwl_free_channel_map(priv);
3235         kfree(priv->scan);
3236 }
3237
3238 static struct attribute *iwl_sysfs_entries[] = {
3239         &dev_attr_flags.attr,
3240         &dev_attr_filter_flags.attr,
3241         &dev_attr_statistics.attr,
3242         &dev_attr_temperature.attr,
3243         &dev_attr_tx_power.attr,
3244         &dev_attr_rts_ht_protection.attr,
3245 #ifdef CONFIG_IWLWIFI_DEBUG
3246         &dev_attr_debug_level.attr,
3247 #endif
3248         NULL
3249 };
3250
3251 static struct attribute_group iwl_attribute_group = {
3252         .name = NULL,           /* put in device directory */
3253         .attrs = iwl_sysfs_entries,
3254 };
3255
3256 static struct ieee80211_ops iwl_hw_ops = {
3257         .tx = iwl_mac_tx,
3258         .start = iwl_mac_start,
3259         .stop = iwl_mac_stop,
3260         .add_interface = iwl_mac_add_interface,
3261         .remove_interface = iwl_mac_remove_interface,
3262         .config = iwl_mac_config,
3263         .configure_filter = iwl_configure_filter,
3264         .set_key = iwl_mac_set_key,
3265         .update_tkip_key = iwl_mac_update_tkip_key,
3266         .get_stats = iwl_mac_get_stats,
3267         .get_tx_stats = iwl_mac_get_tx_stats,
3268         .conf_tx = iwl_mac_conf_tx,
3269         .reset_tsf = iwl_mac_reset_tsf,
3270         .bss_info_changed = iwl_bss_info_changed,
3271         .ampdu_action = iwl_mac_ampdu_action,
3272         .hw_scan = iwl_mac_hw_scan,
3273         .sta_notify = iwl_mac_sta_notify,
3274 };
3275
3276 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3277 {
3278         int err = 0;
3279         struct iwl_priv *priv;
3280         struct ieee80211_hw *hw;
3281         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3282         unsigned long flags;
3283         u16 pci_cmd;
3284
3285         /************************
3286          * 1. Allocating HW data
3287          ************************/
3288
3289         /* Disabling hardware scan means that mac80211 will perform scans
3290          * "the hard way", rather than using device's scan. */
3291         if (cfg->mod_params->disable_hw_scan) {
3292                 if (iwl_debug_level & IWL_DL_INFO)
3293                         dev_printk(KERN_DEBUG, &(pdev->dev),
3294                                    "Disabling hw_scan\n");
3295                 iwl_hw_ops.hw_scan = NULL;
3296         }
3297
3298         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3299         if (!hw) {
3300                 err = -ENOMEM;
3301                 goto out;
3302         }
3303         priv = hw->priv;
3304         /* At this point both hw and priv are allocated. */
3305
3306         SET_IEEE80211_DEV(hw, &pdev->dev);
3307
3308         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3309         priv->cfg = cfg;
3310         priv->pci_dev = pdev;
3311         priv->inta_mask = CSR_INI_SET_MASK;
3312
3313 #ifdef CONFIG_IWLWIFI_DEBUG
3314         atomic_set(&priv->restrict_refcnt, 0);
3315 #endif
3316         if (iwl_alloc_traffic_mem(priv))
3317                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3318
3319         /**************************
3320          * 2. Initializing PCI bus
3321          **************************/
3322         if (pci_enable_device(pdev)) {
3323                 err = -ENODEV;
3324                 goto out_ieee80211_free_hw;
3325         }
3326
3327         pci_set_master(pdev);
3328
3329         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3330         if (!err)
3331                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3332         if (err) {
3333                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3334                 if (!err)
3335                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3336                 /* both attempts failed: */
3337                 if (err) {
3338                         IWL_WARN(priv, "No suitable DMA available.\n");
3339                         goto out_pci_disable_device;
3340                 }
3341         }
3342
3343         err = pci_request_regions(pdev, DRV_NAME);
3344         if (err)
3345                 goto out_pci_disable_device;
3346
3347         pci_set_drvdata(pdev, priv);
3348
3349
3350         /***********************
3351          * 3. Read REV register
3352          ***********************/
3353         priv->hw_base = pci_iomap(pdev, 0, 0);
3354         if (!priv->hw_base) {
3355                 err = -ENODEV;
3356                 goto out_pci_release_regions;
3357         }
3358
3359         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3360                 (unsigned long long) pci_resource_len(pdev, 0));
3361         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3362
3363         /* these spin locks will be used in apm_ops.init and EEPROM access
3364          * we should init now
3365          */
3366         spin_lock_init(&priv->reg_lock);
3367         spin_lock_init(&priv->lock);
3368         iwl_hw_detect(priv);
3369         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3370                 priv->cfg->name, priv->hw_rev);
3371
3372         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3373          * PCI Tx retries from interfering with C3 CPU state */
3374         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3375
3376         iwl_prepare_card_hw(priv);
3377         if (!priv->hw_ready) {
3378                 IWL_WARN(priv, "Failed, HW not ready\n");
3379                 goto out_iounmap;
3380         }
3381
3382         /*****************
3383          * 4. Read EEPROM
3384          *****************/
3385         /* Read the EEPROM */
3386         err = iwl_eeprom_init(priv);
3387         if (err) {
3388                 IWL_ERR(priv, "Unable to init EEPROM\n");
3389                 goto out_iounmap;
3390         }
3391         err = iwl_eeprom_check_version(priv);
3392         if (err)
3393                 goto out_free_eeprom;
3394
3395         /* extract MAC Address */
3396         iwl_eeprom_get_mac(priv, priv->mac_addr);
3397         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3398         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3399
3400         /************************
3401          * 5. Setup HW constants
3402          ************************/
3403         if (iwl_set_hw_params(priv)) {
3404                 IWL_ERR(priv, "failed to set hw parameters\n");
3405                 goto out_free_eeprom;
3406         }
3407
3408         /*******************
3409          * 6. Setup priv
3410          *******************/
3411
3412         err = iwl_init_drv(priv);
3413         if (err)
3414                 goto out_free_eeprom;
3415         /* At this point both hw and priv are initialized. */
3416
3417         /********************
3418          * 7. Setup services
3419          ********************/
3420         spin_lock_irqsave(&priv->lock, flags);
3421         iwl_disable_interrupts(priv);
3422         spin_unlock_irqrestore(&priv->lock, flags);
3423
3424         pci_enable_msi(priv->pci_dev);
3425
3426         iwl_alloc_isr_ict(priv);
3427         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3428                           IRQF_SHARED, DRV_NAME, priv);
3429         if (err) {
3430                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3431                 goto out_disable_msi;
3432         }
3433         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3434         if (err) {
3435                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3436                 goto out_free_irq;
3437         }
3438
3439         iwl_setup_deferred_work(priv);
3440         iwl_setup_rx_handlers(priv);
3441
3442         /**********************************
3443          * 8. Setup and register mac80211
3444          **********************************/
3445
3446         /* enable interrupts if needed: hw bug w/a */
3447         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3448         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3449                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3450                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3451         }
3452
3453         iwl_enable_interrupts(priv);
3454
3455         err = iwl_setup_mac(priv);
3456         if (err)
3457                 goto out_remove_sysfs;
3458
3459         err = iwl_dbgfs_register(priv, DRV_NAME);
3460         if (err)
3461                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3462
3463         /* If platform's RF_KILL switch is NOT set to KILL */
3464         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3465                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3466         else
3467                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3468
3469         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3470                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3471
3472         iwl_power_initialize(priv);
3473         iwl_tt_initialize(priv);
3474         return 0;
3475
3476  out_remove_sysfs:
3477         destroy_workqueue(priv->workqueue);
3478         priv->workqueue = NULL;
3479         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3480  out_free_irq:
3481         free_irq(priv->pci_dev->irq, priv);
3482         iwl_free_isr_ict(priv);
3483  out_disable_msi:
3484         pci_disable_msi(priv->pci_dev);
3485         iwl_uninit_drv(priv);
3486  out_free_eeprom:
3487         iwl_eeprom_free(priv);
3488  out_iounmap:
3489         pci_iounmap(pdev, priv->hw_base);
3490  out_pci_release_regions:
3491         pci_set_drvdata(pdev, NULL);
3492         pci_release_regions(pdev);
3493  out_pci_disable_device:
3494         pci_disable_device(pdev);
3495  out_ieee80211_free_hw:
3496         iwl_free_traffic_mem(priv);
3497         ieee80211_free_hw(priv->hw);
3498  out:
3499         return err;
3500 }
3501
3502 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3503 {
3504         struct iwl_priv *priv = pci_get_drvdata(pdev);
3505         unsigned long flags;
3506
3507         if (!priv)
3508                 return;
3509
3510         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3511
3512         iwl_dbgfs_unregister(priv);
3513         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3514
3515         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3516          * to be called and iwl_down since we are removing the device
3517          * we need to set STATUS_EXIT_PENDING bit.
3518          */
3519         set_bit(STATUS_EXIT_PENDING, &priv->status);
3520         if (priv->mac80211_registered) {
3521                 ieee80211_unregister_hw(priv->hw);
3522                 priv->mac80211_registered = 0;
3523         } else {
3524                 iwl_down(priv);
3525         }
3526
3527         /*
3528          * Make sure device is reset to low power before unloading driver.
3529          * This may be redundant with iwl_down(), but there are paths to
3530          * run iwl_down() without calling apm_ops.stop(), and there are
3531          * paths to avoid running iwl_down() at all before leaving driver.
3532          * This (inexpensive) call *makes sure* device is reset.
3533          */
3534         priv->cfg->ops->lib->apm_ops.stop(priv);
3535
3536         iwl_tt_exit(priv);
3537
3538         /* make sure we flush any pending irq or
3539          * tasklet for the driver
3540          */
3541         spin_lock_irqsave(&priv->lock, flags);
3542         iwl_disable_interrupts(priv);
3543         spin_unlock_irqrestore(&priv->lock, flags);
3544
3545         iwl_synchronize_irq(priv);
3546
3547         iwl_dealloc_ucode_pci(priv);
3548
3549         if (priv->rxq.bd)
3550                 iwl_rx_queue_free(priv, &priv->rxq);
3551         iwl_hw_txq_ctx_free(priv);
3552
3553         iwl_clear_stations_table(priv);
3554         iwl_eeprom_free(priv);
3555
3556
3557         /*netif_stop_queue(dev); */
3558         flush_workqueue(priv->workqueue);
3559
3560         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3561          * priv->workqueue... so we can't take down the workqueue
3562          * until now... */
3563         destroy_workqueue(priv->workqueue);
3564         priv->workqueue = NULL;
3565         iwl_free_traffic_mem(priv);
3566
3567         free_irq(priv->pci_dev->irq, priv);
3568         pci_disable_msi(priv->pci_dev);
3569         pci_iounmap(pdev, priv->hw_base);
3570         pci_release_regions(pdev);
3571         pci_disable_device(pdev);
3572         pci_set_drvdata(pdev, NULL);
3573
3574         iwl_uninit_drv(priv);
3575
3576         iwl_free_isr_ict(priv);
3577
3578         if (priv->ibss_beacon)
3579                 dev_kfree_skb(priv->ibss_beacon);
3580
3581         ieee80211_free_hw(priv->hw);
3582 }
3583
3584
3585 /*****************************************************************************
3586  *
3587  * driver and module entry point
3588  *
3589  *****************************************************************************/
3590
3591 /* Hardware specific file defines the PCI IDs table for that hardware module */
3592 static struct pci_device_id iwl_hw_card_ids[] = {
3593 #ifdef CONFIG_IWL4965
3594         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3595         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3596 #endif /* CONFIG_IWL4965 */
3597 #ifdef CONFIG_IWL5000
3598 /* 5100 Series WiFi */
3599         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
3600         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
3601         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
3602         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
3603         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
3604         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
3605         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
3606         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
3607         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
3608         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
3609         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
3610         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
3611         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
3612         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
3613         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
3614         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
3615         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
3616         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
3617         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
3618         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
3619         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
3620         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
3621         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
3622         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
3623
3624 /* 5300 Series WiFi */
3625         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
3626         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
3627         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
3628         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
3629         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
3630         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
3631         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
3632         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
3633         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
3634         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
3635         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
3636         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
3637
3638 /* 5350 Series WiFi/WiMax */
3639         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
3640         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
3641         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
3642
3643 /* 5150 Series Wifi/WiMax */
3644         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
3645         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
3646         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
3647         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
3648         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
3649         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
3650
3651         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
3652         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
3653         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
3654         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
3655
3656 /* 6x00 Series */
3657         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3658         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3659         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3660         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3661         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3662         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3663         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3664         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3665         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3666         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3667
3668 /* 6x50 WiFi/WiMax Series */
3669         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3670         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3671         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3672         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3673         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3674         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3675
3676 /* 1000 Series WiFi */
3677         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3678         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3679         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3680         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3681         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3682         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3683         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3684         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3685         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3686         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3687         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3688         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3689 #endif /* CONFIG_IWL5000 */
3690
3691         {0}
3692 };
3693 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3694
3695 static struct pci_driver iwl_driver = {
3696         .name = DRV_NAME,
3697         .id_table = iwl_hw_card_ids,
3698         .probe = iwl_pci_probe,
3699         .remove = __devexit_p(iwl_pci_remove),
3700 #ifdef CONFIG_PM
3701         .suspend = iwl_pci_suspend,
3702         .resume = iwl_pci_resume,
3703 #endif
3704 };
3705
3706 static int __init iwl_init(void)
3707 {
3708
3709         int ret;
3710         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3711         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3712
3713         ret = iwlagn_rate_control_register();
3714         if (ret) {
3715                 printk(KERN_ERR DRV_NAME
3716                        "Unable to register rate control algorithm: %d\n", ret);
3717                 return ret;
3718         }
3719
3720         ret = pci_register_driver(&iwl_driver);
3721         if (ret) {
3722                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3723                 goto error_register;
3724         }
3725
3726         return ret;
3727
3728 error_register:
3729         iwlagn_rate_control_unregister();
3730         return ret;
3731 }
3732
3733 static void __exit iwl_exit(void)
3734 {
3735         pci_unregister_driver(&iwl_driver);
3736         iwlagn_rate_control_unregister();
3737 }
3738
3739 module_exit(iwl_exit);
3740 module_init(iwl_init);
3741
3742 #ifdef CONFIG_IWLWIFI_DEBUG
3743 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3744 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3745 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3746 MODULE_PARM_DESC(debug, "debug output mask");
3747 #endif
3748