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, "Not valid error log pointer 0x%08X\n", base);
1666                 return;
1667         }
1668
1669         count = iwl_read_targ_mem(priv, base);
1670
1671         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1672                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1673                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1674                         priv->status, count);
1675         }
1676
1677         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1678         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1679         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1680         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1681         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1682         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1683         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1684         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1685         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1686
1687         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1688                                       blink1, blink2, ilink1, ilink2);
1689
1690         IWL_ERR(priv, "Desc                               Time       "
1691                 "data1      data2      line\n");
1692         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1693                 desc_lookup(desc), desc, time, data1, data2, line);
1694         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1695         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1696                 ilink1, ilink2);
1697
1698 }
1699
1700 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1701
1702 /**
1703  * iwl_print_event_log - Dump error event log to syslog
1704  *
1705  */
1706 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1707                                 u32 num_events, u32 mode)
1708 {
1709         u32 i;
1710         u32 base;       /* SRAM byte address of event log header */
1711         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1712         u32 ptr;        /* SRAM byte address of log data */
1713         u32 ev, time, data; /* event log data */
1714         unsigned long reg_flags;
1715
1716         if (num_events == 0)
1717                 return;
1718         if (priv->ucode_type == UCODE_INIT)
1719                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1720         else
1721                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1722
1723         if (mode == 0)
1724                 event_size = 2 * sizeof(u32);
1725         else
1726                 event_size = 3 * sizeof(u32);
1727
1728         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1729
1730         /* Make sure device is powered up for SRAM reads */
1731         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1732         iwl_grab_nic_access(priv);
1733
1734         /* Set starting address; reads will auto-increment */
1735         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1736         rmb();
1737
1738         /* "time" is actually "data" for mode 0 (no timestamp).
1739         * place event id # at far right for easier visual parsing. */
1740         for (i = 0; i < num_events; i++) {
1741                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1742                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1743                 if (mode == 0) {
1744                         /* data, ev */
1745                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1746                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1747                 } else {
1748                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1749                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1750                                         time, data, ev);
1751                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1752                 }
1753         }
1754
1755         /* Allow device to power down */
1756         iwl_release_nic_access(priv);
1757         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1758 }
1759
1760 /**
1761  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1762  */
1763 static void iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1764                                       u32 num_wraps, u32 next_entry,
1765                                       u32 size, u32 mode)
1766 {
1767         /*
1768          * display the newest DEFAULT_LOG_ENTRIES entries
1769          * i.e the entries just before the next ont that uCode would fill.
1770          */
1771         if (num_wraps) {
1772                 if (next_entry < size) {
1773                         iwl_print_event_log(priv,
1774                                         capacity - (size - next_entry),
1775                                         size - next_entry, mode);
1776                         iwl_print_event_log(priv, 0,
1777                                     next_entry, mode);
1778                 } else
1779                         iwl_print_event_log(priv, next_entry - size,
1780                                     size, mode);
1781         } else {
1782                 if (next_entry < size)
1783                         iwl_print_event_log(priv, 0, next_entry, mode);
1784                 else
1785                         iwl_print_event_log(priv, next_entry - size,
1786                                             size, mode);
1787         }
1788 }
1789
1790 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1791 #define MAX_EVENT_LOG_SIZE (512)
1792
1793 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1794
1795 void iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log)
1796 {
1797         u32 base;       /* SRAM byte address of event log header */
1798         u32 capacity;   /* event log capacity in # entries */
1799         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1800         u32 num_wraps;  /* # times uCode wrapped to top of log */
1801         u32 next_entry; /* index of next entry to be written by uCode */
1802         u32 size;       /* # entries that we'll print */
1803
1804         if (priv->ucode_type == UCODE_INIT)
1805                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1806         else
1807                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1808
1809         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1810                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1811                 return;
1812         }
1813
1814         /* event log header */
1815         capacity = iwl_read_targ_mem(priv, base);
1816         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1817         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1818         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1819
1820         if (capacity > MAX_EVENT_LOG_SIZE) {
1821                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1822                         capacity, MAX_EVENT_LOG_SIZE);
1823                 capacity = MAX_EVENT_LOG_SIZE;
1824         }
1825
1826         if (next_entry > MAX_EVENT_LOG_SIZE) {
1827                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1828                         next_entry, MAX_EVENT_LOG_SIZE);
1829                 next_entry = MAX_EVENT_LOG_SIZE;
1830         }
1831
1832         size = num_wraps ? capacity : next_entry;
1833
1834         /* bail out if nothing in log */
1835         if (size == 0) {
1836                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1837                 return;
1838         }
1839
1840 #ifdef CONFIG_IWLWIFI_DEBUG
1841         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS))
1842                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1843                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1844 #else
1845         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1846                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1847 #endif
1848         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1849                 size);
1850
1851 #ifdef CONFIG_IWLWIFI_DEBUG
1852         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1853                 /*
1854                  * if uCode has wrapped back to top of log,
1855                  * start at the oldest entry,
1856                  * i.e the next one that uCode would fill.
1857                  */
1858                 if (num_wraps)
1859                         iwl_print_event_log(priv, next_entry,
1860                                             capacity - next_entry, mode);
1861                 /* (then/else) start at top of log */
1862                 iwl_print_event_log(priv, 0, next_entry, mode);
1863         } else
1864                 iwl_print_last_event_logs(priv, capacity, num_wraps,
1865                                         next_entry, size, mode);
1866 #else
1867         iwl_print_last_event_logs(priv, capacity, num_wraps,
1868                                 next_entry, size, mode);
1869 #endif
1870 }
1871
1872 /**
1873  * iwl_alive_start - called after REPLY_ALIVE notification received
1874  *                   from protocol/runtime uCode (initialization uCode's
1875  *                   Alive gets handled by iwl_init_alive_start()).
1876  */
1877 static void iwl_alive_start(struct iwl_priv *priv)
1878 {
1879         int ret = 0;
1880
1881         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1882
1883         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1884                 /* We had an error bringing up the hardware, so take it
1885                  * all the way back down so we can try again */
1886                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1887                 goto restart;
1888         }
1889
1890         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1891          * This is a paranoid check, because we would not have gotten the
1892          * "runtime" alive if code weren't properly loaded.  */
1893         if (iwl_verify_ucode(priv)) {
1894                 /* Runtime instruction load was bad;
1895                  * take it all the way back down so we can try again */
1896                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1897                 goto restart;
1898         }
1899
1900         iwl_clear_stations_table(priv);
1901         ret = priv->cfg->ops->lib->alive_notify(priv);
1902         if (ret) {
1903                 IWL_WARN(priv,
1904                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1905                 goto restart;
1906         }
1907
1908         /* After the ALIVE response, we can send host commands to the uCode */
1909         set_bit(STATUS_ALIVE, &priv->status);
1910
1911         if (iwl_is_rfkill(priv))
1912                 return;
1913
1914         ieee80211_wake_queues(priv->hw);
1915
1916         priv->active_rate = priv->rates_mask;
1917         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1918
1919         /* Configure Tx antenna selection based on H/W config */
1920         if (priv->cfg->ops->hcmd->set_tx_ant)
1921                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
1922
1923         if (iwl_is_associated(priv)) {
1924                 struct iwl_rxon_cmd *active_rxon =
1925                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1926                 /* apply any changes in staging */
1927                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1928                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1929         } else {
1930                 /* Initialize our rx_config data */
1931                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1932
1933                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1934                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1935
1936                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1937         }
1938
1939         /* Configure Bluetooth device coexistence support */
1940         iwl_send_bt_config(priv);
1941
1942         iwl_reset_run_time_calib(priv);
1943
1944         /* Configure the adapter for unassociated operation */
1945         iwlcore_commit_rxon(priv);
1946
1947         /* At this point, the NIC is initialized and operational */
1948         iwl_rf_kill_ct_config(priv);
1949
1950         iwl_leds_init(priv);
1951
1952         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1953         set_bit(STATUS_READY, &priv->status);
1954         wake_up_interruptible(&priv->wait_command_queue);
1955
1956         iwl_power_update_mode(priv, true);
1957
1958         /* reassociate for ADHOC mode */
1959         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1960                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1961                                                                 priv->vif);
1962                 if (beacon)
1963                         iwl_mac_beacon_update(priv->hw, beacon);
1964         }
1965
1966
1967         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1968                 iwl_set_mode(priv, priv->iw_mode);
1969
1970         return;
1971
1972  restart:
1973         queue_work(priv->workqueue, &priv->restart);
1974 }
1975
1976 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1977
1978 static void __iwl_down(struct iwl_priv *priv)
1979 {
1980         unsigned long flags;
1981         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1982
1983         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1984
1985         if (!exit_pending)
1986                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1987
1988         iwl_clear_stations_table(priv);
1989
1990         /* Unblock any waiting calls */
1991         wake_up_interruptible_all(&priv->wait_command_queue);
1992
1993         /* Wipe out the EXIT_PENDING status bit if we are not actually
1994          * exiting the module */
1995         if (!exit_pending)
1996                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1997
1998         /* stop and reset the on-board processor */
1999         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2000
2001         /* tell the device to stop sending interrupts */
2002         spin_lock_irqsave(&priv->lock, flags);
2003         iwl_disable_interrupts(priv);
2004         spin_unlock_irqrestore(&priv->lock, flags);
2005         iwl_synchronize_irq(priv);
2006
2007         if (priv->mac80211_registered)
2008                 ieee80211_stop_queues(priv->hw);
2009
2010         /* If we have not previously called iwl_init() then
2011          * clear all bits but the RF Kill bit and return */
2012         if (!iwl_is_init(priv)) {
2013                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2014                                         STATUS_RF_KILL_HW |
2015                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2016                                         STATUS_GEO_CONFIGURED |
2017                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2018                                         STATUS_EXIT_PENDING;
2019                 goto exit;
2020         }
2021
2022         /* ...otherwise clear out all the status bits but the RF Kill
2023          * bit and continue taking the NIC down. */
2024         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2025                                 STATUS_RF_KILL_HW |
2026                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2027                                 STATUS_GEO_CONFIGURED |
2028                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2029                                 STATUS_FW_ERROR |
2030                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2031                                 STATUS_EXIT_PENDING;
2032
2033         /* device going down, Stop using ICT table */
2034         iwl_disable_ict(priv);
2035
2036         iwl_txq_ctx_stop(priv);
2037         iwl_rxq_stop(priv);
2038
2039         /* Power-down device's busmaster DMA clocks */
2040         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2041         udelay(5);
2042
2043         /* Make sure (redundant) we've released our request to stay awake */
2044         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2045
2046         /* Stop the device, and put it in low power state */
2047         priv->cfg->ops->lib->apm_ops.stop(priv);
2048
2049  exit:
2050         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2051
2052         if (priv->ibss_beacon)
2053                 dev_kfree_skb(priv->ibss_beacon);
2054         priv->ibss_beacon = NULL;
2055
2056         /* clear out any free frames */
2057         iwl_clear_free_frames(priv);
2058 }
2059
2060 static void iwl_down(struct iwl_priv *priv)
2061 {
2062         mutex_lock(&priv->mutex);
2063         __iwl_down(priv);
2064         mutex_unlock(&priv->mutex);
2065
2066         iwl_cancel_deferred_work(priv);
2067 }
2068
2069 #define HW_READY_TIMEOUT (50)
2070
2071 static int iwl_set_hw_ready(struct iwl_priv *priv)
2072 {
2073         int ret = 0;
2074
2075         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2076                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2077
2078         /* See if we got it */
2079         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2080                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2081                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2082                                 HW_READY_TIMEOUT);
2083         if (ret != -ETIMEDOUT)
2084                 priv->hw_ready = true;
2085         else
2086                 priv->hw_ready = false;
2087
2088         IWL_DEBUG_INFO(priv, "hardware %s\n",
2089                       (priv->hw_ready == 1) ? "ready" : "not ready");
2090         return ret;
2091 }
2092
2093 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2094 {
2095         int ret = 0;
2096
2097         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2098
2099         ret = iwl_set_hw_ready(priv);
2100         if (priv->hw_ready)
2101                 return ret;
2102
2103         /* If HW is not ready, prepare the conditions to check again */
2104         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2105                         CSR_HW_IF_CONFIG_REG_PREPARE);
2106
2107         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2108                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2109                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2110
2111         /* HW should be ready by now, check again. */
2112         if (ret != -ETIMEDOUT)
2113                 iwl_set_hw_ready(priv);
2114
2115         return ret;
2116 }
2117
2118 #define MAX_HW_RESTARTS 5
2119
2120 static int __iwl_up(struct iwl_priv *priv)
2121 {
2122         int i;
2123         int ret;
2124
2125         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2126                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2127                 return -EIO;
2128         }
2129
2130         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2131                 IWL_ERR(priv, "ucode not available for device bringup\n");
2132                 return -EIO;
2133         }
2134
2135         iwl_prepare_card_hw(priv);
2136
2137         if (!priv->hw_ready) {
2138                 IWL_WARN(priv, "Exit HW not ready\n");
2139                 return -EIO;
2140         }
2141
2142         /* If platform's RF_KILL switch is NOT set to KILL */
2143         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2144                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2145         else
2146                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2147
2148         if (iwl_is_rfkill(priv)) {
2149                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2150
2151                 iwl_enable_interrupts(priv);
2152                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2153                 return 0;
2154         }
2155
2156         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2157
2158         ret = iwl_hw_nic_init(priv);
2159         if (ret) {
2160                 IWL_ERR(priv, "Unable to init nic\n");
2161                 return ret;
2162         }
2163
2164         /* make sure rfkill handshake bits are cleared */
2165         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2166         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2167                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2168
2169         /* clear (again), then enable host interrupts */
2170         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2171         iwl_enable_interrupts(priv);
2172
2173         /* really make sure rfkill handshake bits are cleared */
2174         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2175         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2176
2177         /* Copy original ucode data image from disk into backup cache.
2178          * This will be used to initialize the on-board processor's
2179          * data SRAM for a clean start when the runtime program first loads. */
2180         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2181                priv->ucode_data.len);
2182
2183         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2184
2185                 iwl_clear_stations_table(priv);
2186
2187                 /* load bootstrap state machine,
2188                  * load bootstrap program into processor's memory,
2189                  * prepare to load the "initialize" uCode */
2190                 ret = priv->cfg->ops->lib->load_ucode(priv);
2191
2192                 if (ret) {
2193                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2194                                 ret);
2195                         continue;
2196                 }
2197
2198                 /* start card; "initialize" will load runtime ucode */
2199                 iwl_nic_start(priv);
2200
2201                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2202
2203                 return 0;
2204         }
2205
2206         set_bit(STATUS_EXIT_PENDING, &priv->status);
2207         __iwl_down(priv);
2208         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2209
2210         /* tried to restart and config the device for as long as our
2211          * patience could withstand */
2212         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2213         return -EIO;
2214 }
2215
2216
2217 /*****************************************************************************
2218  *
2219  * Workqueue callbacks
2220  *
2221  *****************************************************************************/
2222
2223 static void iwl_bg_init_alive_start(struct work_struct *data)
2224 {
2225         struct iwl_priv *priv =
2226             container_of(data, struct iwl_priv, init_alive_start.work);
2227
2228         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2229                 return;
2230
2231         mutex_lock(&priv->mutex);
2232         priv->cfg->ops->lib->init_alive_start(priv);
2233         mutex_unlock(&priv->mutex);
2234 }
2235
2236 static void iwl_bg_alive_start(struct work_struct *data)
2237 {
2238         struct iwl_priv *priv =
2239             container_of(data, struct iwl_priv, alive_start.work);
2240
2241         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2242                 return;
2243
2244         /* enable dram interrupt */
2245         iwl_reset_ict(priv);
2246
2247         mutex_lock(&priv->mutex);
2248         iwl_alive_start(priv);
2249         mutex_unlock(&priv->mutex);
2250 }
2251
2252 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2253 {
2254         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2255                         run_time_calib_work);
2256
2257         mutex_lock(&priv->mutex);
2258
2259         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2260             test_bit(STATUS_SCANNING, &priv->status)) {
2261                 mutex_unlock(&priv->mutex);
2262                 return;
2263         }
2264
2265         if (priv->start_calib) {
2266                 iwl_chain_noise_calibration(priv, &priv->statistics);
2267
2268                 iwl_sensitivity_calibration(priv, &priv->statistics);
2269         }
2270
2271         mutex_unlock(&priv->mutex);
2272         return;
2273 }
2274
2275 static void iwl_bg_up(struct work_struct *data)
2276 {
2277         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2278
2279         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2280                 return;
2281
2282         mutex_lock(&priv->mutex);
2283         __iwl_up(priv);
2284         mutex_unlock(&priv->mutex);
2285 }
2286
2287 static void iwl_bg_restart(struct work_struct *data)
2288 {
2289         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2290
2291         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2292                 return;
2293
2294         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2295                 mutex_lock(&priv->mutex);
2296                 priv->vif = NULL;
2297                 priv->is_open = 0;
2298                 mutex_unlock(&priv->mutex);
2299                 iwl_down(priv);
2300                 ieee80211_restart_hw(priv->hw);
2301         } else {
2302                 iwl_down(priv);
2303                 queue_work(priv->workqueue, &priv->up);
2304         }
2305 }
2306
2307 static void iwl_bg_rx_replenish(struct work_struct *data)
2308 {
2309         struct iwl_priv *priv =
2310             container_of(data, struct iwl_priv, rx_replenish);
2311
2312         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2313                 return;
2314
2315         mutex_lock(&priv->mutex);
2316         iwl_rx_replenish(priv);
2317         mutex_unlock(&priv->mutex);
2318 }
2319
2320 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2321
2322 void iwl_post_associate(struct iwl_priv *priv)
2323 {
2324         struct ieee80211_conf *conf = NULL;
2325         int ret = 0;
2326         unsigned long flags;
2327
2328         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2329                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2330                 return;
2331         }
2332
2333         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2334                         priv->assoc_id, priv->active_rxon.bssid_addr);
2335
2336
2337         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2338                 return;
2339
2340
2341         if (!priv->vif || !priv->is_open)
2342                 return;
2343
2344         iwl_scan_cancel_timeout(priv, 200);
2345
2346         conf = ieee80211_get_hw_conf(priv->hw);
2347
2348         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2349         iwlcore_commit_rxon(priv);
2350
2351         iwl_setup_rxon_timing(priv);
2352         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2353                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2354         if (ret)
2355                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2356                             "Attempting to continue.\n");
2357
2358         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2359
2360         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2361
2362         if (priv->cfg->ops->hcmd->set_rxon_chain)
2363                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2364
2365         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2366
2367         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2368                         priv->assoc_id, priv->beacon_int);
2369
2370         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2371                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2372         else
2373                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2374
2375         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2376                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2377                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2378                 else
2379                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2380
2381                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2382                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2383
2384         }
2385
2386         iwlcore_commit_rxon(priv);
2387
2388         switch (priv->iw_mode) {
2389         case NL80211_IFTYPE_STATION:
2390                 break;
2391
2392         case NL80211_IFTYPE_ADHOC:
2393
2394                 /* assume default assoc id */
2395                 priv->assoc_id = 1;
2396
2397                 iwl_rxon_add_station(priv, priv->bssid, 0);
2398                 iwl_send_beacon_cmd(priv);
2399
2400                 break;
2401
2402         default:
2403                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2404                           __func__, priv->iw_mode);
2405                 break;
2406         }
2407
2408         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2409                 priv->assoc_station_added = 1;
2410
2411         spin_lock_irqsave(&priv->lock, flags);
2412         iwl_activate_qos(priv, 0);
2413         spin_unlock_irqrestore(&priv->lock, flags);
2414
2415         /* the chain noise calibration will enabled PM upon completion
2416          * If chain noise has already been run, then we need to enable
2417          * power management here */
2418         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2419                 iwl_power_update_mode(priv, false);
2420
2421         /* Enable Rx differential gain and sensitivity calibrations */
2422         iwl_chain_noise_reset(priv);
2423         priv->start_calib = 1;
2424
2425 }
2426
2427 /*****************************************************************************
2428  *
2429  * mac80211 entry point functions
2430  *
2431  *****************************************************************************/
2432
2433 #define UCODE_READY_TIMEOUT     (4 * HZ)
2434
2435 /*
2436  * Not a mac80211 entry point function, but it fits in with all the
2437  * other mac80211 functions grouped here.
2438  */
2439 static int iwl_setup_mac(struct iwl_priv *priv)
2440 {
2441         int ret;
2442         struct ieee80211_hw *hw = priv->hw;
2443         hw->rate_control_algorithm = "iwl-agn-rs";
2444
2445         /* Tell mac80211 our characteristics */
2446         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2447                     IEEE80211_HW_NOISE_DBM |
2448                     IEEE80211_HW_AMPDU_AGGREGATION |
2449                     IEEE80211_HW_SPECTRUM_MGMT;
2450
2451         if (!priv->cfg->broken_powersave)
2452                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2453                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2454
2455         hw->sta_data_size = sizeof(struct iwl_station_priv);
2456         hw->wiphy->interface_modes =
2457                 BIT(NL80211_IFTYPE_STATION) |
2458                 BIT(NL80211_IFTYPE_ADHOC);
2459
2460         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
2461                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
2462
2463         /*
2464          * For now, disable PS by default because it affects
2465          * RX performance significantly.
2466          */
2467         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2468
2469         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2470         /* we create the 802.11 header and a zero-length SSID element */
2471         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2472
2473         /* Default value; 4 EDCA QOS priorities */
2474         hw->queues = 4;
2475
2476         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2477
2478         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2479                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2480                         &priv->bands[IEEE80211_BAND_2GHZ];
2481         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2482                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2483                         &priv->bands[IEEE80211_BAND_5GHZ];
2484
2485         ret = ieee80211_register_hw(priv->hw);
2486         if (ret) {
2487                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2488                 return ret;
2489         }
2490         priv->mac80211_registered = 1;
2491
2492         return 0;
2493 }
2494
2495
2496 static int iwl_mac_start(struct ieee80211_hw *hw)
2497 {
2498         struct iwl_priv *priv = hw->priv;
2499         int ret;
2500
2501         IWL_DEBUG_MAC80211(priv, "enter\n");
2502
2503         /* we should be verifying the device is ready to be opened */
2504         mutex_lock(&priv->mutex);
2505
2506         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2507          * ucode filename and max sizes are card-specific. */
2508
2509         if (!priv->ucode_code.len) {
2510                 ret = iwl_read_ucode(priv);
2511                 if (ret) {
2512                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2513                         mutex_unlock(&priv->mutex);
2514                         return ret;
2515                 }
2516         }
2517
2518         ret = __iwl_up(priv);
2519
2520         mutex_unlock(&priv->mutex);
2521
2522         if (ret)
2523                 return ret;
2524
2525         if (iwl_is_rfkill(priv))
2526                 goto out;
2527
2528         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2529
2530         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2531          * mac80211 will not be run successfully. */
2532         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2533                         test_bit(STATUS_READY, &priv->status),
2534                         UCODE_READY_TIMEOUT);
2535         if (!ret) {
2536                 if (!test_bit(STATUS_READY, &priv->status)) {
2537                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2538                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2539                         return -ETIMEDOUT;
2540                 }
2541         }
2542
2543         iwl_led_start(priv);
2544
2545 out:
2546         priv->is_open = 1;
2547         IWL_DEBUG_MAC80211(priv, "leave\n");
2548         return 0;
2549 }
2550
2551 static void iwl_mac_stop(struct ieee80211_hw *hw)
2552 {
2553         struct iwl_priv *priv = hw->priv;
2554
2555         IWL_DEBUG_MAC80211(priv, "enter\n");
2556
2557         if (!priv->is_open)
2558                 return;
2559
2560         priv->is_open = 0;
2561
2562         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2563                 /* stop mac, cancel any scan request and clear
2564                  * RXON_FILTER_ASSOC_MSK BIT
2565                  */
2566                 mutex_lock(&priv->mutex);
2567                 iwl_scan_cancel_timeout(priv, 100);
2568                 mutex_unlock(&priv->mutex);
2569         }
2570
2571         iwl_down(priv);
2572
2573         flush_workqueue(priv->workqueue);
2574
2575         /* enable interrupts again in order to receive rfkill changes */
2576         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2577         iwl_enable_interrupts(priv);
2578
2579         IWL_DEBUG_MAC80211(priv, "leave\n");
2580 }
2581
2582 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2583 {
2584         struct iwl_priv *priv = hw->priv;
2585
2586         IWL_DEBUG_MACDUMP(priv, "enter\n");
2587
2588         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2589                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2590
2591         if (iwl_tx_skb(priv, skb))
2592                 dev_kfree_skb_any(skb);
2593
2594         IWL_DEBUG_MACDUMP(priv, "leave\n");
2595         return NETDEV_TX_OK;
2596 }
2597
2598 void iwl_config_ap(struct iwl_priv *priv)
2599 {
2600         int ret = 0;
2601         unsigned long flags;
2602
2603         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2604                 return;
2605
2606         /* The following should be done only at AP bring up */
2607         if (!iwl_is_associated(priv)) {
2608
2609                 /* RXON - unassoc (to set timing command) */
2610                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2611                 iwlcore_commit_rxon(priv);
2612
2613                 /* RXON Timing */
2614                 iwl_setup_rxon_timing(priv);
2615                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2616                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2617                 if (ret)
2618                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2619                                         "Attempting to continue.\n");
2620
2621                 /* AP has all antennas */
2622                 priv->chain_noise_data.active_chains =
2623                         priv->hw_params.valid_rx_ant;
2624                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2625                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2626                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2627
2628                 /* FIXME: what should be the assoc_id for AP? */
2629                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2630                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2631                         priv->staging_rxon.flags |=
2632                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2633                 else
2634                         priv->staging_rxon.flags &=
2635                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2636
2637                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2638                         if (priv->assoc_capability &
2639                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2640                                 priv->staging_rxon.flags |=
2641                                         RXON_FLG_SHORT_SLOT_MSK;
2642                         else
2643                                 priv->staging_rxon.flags &=
2644                                         ~RXON_FLG_SHORT_SLOT_MSK;
2645
2646                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2647                                 priv->staging_rxon.flags &=
2648                                         ~RXON_FLG_SHORT_SLOT_MSK;
2649                 }
2650                 /* restore RXON assoc */
2651                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2652                 iwlcore_commit_rxon(priv);
2653                 iwl_reset_qos(priv);
2654                 spin_lock_irqsave(&priv->lock, flags);
2655                 iwl_activate_qos(priv, 1);
2656                 spin_unlock_irqrestore(&priv->lock, flags);
2657                 iwl_add_bcast_station(priv);
2658         }
2659         iwl_send_beacon_cmd(priv);
2660
2661         /* FIXME - we need to add code here to detect a totally new
2662          * configuration, reset the AP, unassoc, rxon timing, assoc,
2663          * clear sta table, add BCAST sta... */
2664 }
2665
2666 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2667                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2668                         u32 iv32, u16 *phase1key)
2669 {
2670
2671         struct iwl_priv *priv = hw->priv;
2672         IWL_DEBUG_MAC80211(priv, "enter\n");
2673
2674         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2675
2676         IWL_DEBUG_MAC80211(priv, "leave\n");
2677 }
2678
2679 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2680                            struct ieee80211_vif *vif,
2681                            struct ieee80211_sta *sta,
2682                            struct ieee80211_key_conf *key)
2683 {
2684         struct iwl_priv *priv = hw->priv;
2685         const u8 *addr;
2686         int ret;
2687         u8 sta_id;
2688         bool is_default_wep_key = false;
2689
2690         IWL_DEBUG_MAC80211(priv, "enter\n");
2691
2692         if (priv->cfg->mod_params->sw_crypto) {
2693                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2694                 return -EOPNOTSUPP;
2695         }
2696         addr = sta ? sta->addr : iwl_bcast_addr;
2697         sta_id = iwl_find_station(priv, addr);
2698         if (sta_id == IWL_INVALID_STATION) {
2699                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2700                                    addr);
2701                 return -EINVAL;
2702
2703         }
2704
2705         mutex_lock(&priv->mutex);
2706         iwl_scan_cancel_timeout(priv, 100);
2707         mutex_unlock(&priv->mutex);
2708
2709         /* If we are getting WEP group key and we didn't receive any key mapping
2710          * so far, we are in legacy wep mode (group key only), otherwise we are
2711          * in 1X mode.
2712          * In legacy wep mode, we use another host command to the uCode */
2713         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2714                 priv->iw_mode != NL80211_IFTYPE_AP) {
2715                 if (cmd == SET_KEY)
2716                         is_default_wep_key = !priv->key_mapping_key;
2717                 else
2718                         is_default_wep_key =
2719                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2720         }
2721
2722         switch (cmd) {
2723         case SET_KEY:
2724                 if (is_default_wep_key)
2725                         ret = iwl_set_default_wep_key(priv, key);
2726                 else
2727                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2728
2729                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2730                 break;
2731         case DISABLE_KEY:
2732                 if (is_default_wep_key)
2733                         ret = iwl_remove_default_wep_key(priv, key);
2734                 else
2735                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2736
2737                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2738                 break;
2739         default:
2740                 ret = -EINVAL;
2741         }
2742
2743         IWL_DEBUG_MAC80211(priv, "leave\n");
2744
2745         return ret;
2746 }
2747
2748 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2749                                 struct ieee80211_vif *vif,
2750                              enum ieee80211_ampdu_mlme_action action,
2751                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2752 {
2753         struct iwl_priv *priv = hw->priv;
2754         int ret;
2755
2756         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2757                      sta->addr, tid);
2758
2759         if (!(priv->cfg->sku & IWL_SKU_N))
2760                 return -EACCES;
2761
2762         switch (action) {
2763         case IEEE80211_AMPDU_RX_START:
2764                 IWL_DEBUG_HT(priv, "start Rx\n");
2765                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2766         case IEEE80211_AMPDU_RX_STOP:
2767                 IWL_DEBUG_HT(priv, "stop Rx\n");
2768                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2769                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2770                         return 0;
2771                 else
2772                         return ret;
2773         case IEEE80211_AMPDU_TX_START:
2774                 IWL_DEBUG_HT(priv, "start Tx\n");
2775                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2776         case IEEE80211_AMPDU_TX_STOP:
2777                 IWL_DEBUG_HT(priv, "stop Tx\n");
2778                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2779                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2780                         return 0;
2781                 else
2782                         return ret;
2783         default:
2784                 IWL_DEBUG_HT(priv, "unknown\n");
2785                 return -EINVAL;
2786                 break;
2787         }
2788         return 0;
2789 }
2790
2791 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2792                              struct ieee80211_low_level_stats *stats)
2793 {
2794         struct iwl_priv *priv = hw->priv;
2795
2796         priv = hw->priv;
2797         IWL_DEBUG_MAC80211(priv, "enter\n");
2798         IWL_DEBUG_MAC80211(priv, "leave\n");
2799
2800         return 0;
2801 }
2802
2803 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2804                                struct ieee80211_vif *vif,
2805                                enum sta_notify_cmd cmd,
2806                                struct ieee80211_sta *sta)
2807 {
2808         struct iwl_priv *priv = hw->priv;
2809         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2810         int sta_id;
2811
2812         /*
2813          * TODO: We really should use this callback to
2814          *       actually maintain the station table in
2815          *       the device.
2816          */
2817
2818         switch (cmd) {
2819         case STA_NOTIFY_ADD:
2820                 atomic_set(&sta_priv->pending_frames, 0);
2821                 if (vif->type == NL80211_IFTYPE_AP)
2822                         sta_priv->client = true;
2823                 break;
2824         case STA_NOTIFY_SLEEP:
2825                 WARN_ON(!sta_priv->client);
2826                 sta_priv->asleep = true;
2827                 if (atomic_read(&sta_priv->pending_frames) > 0)
2828                         ieee80211_sta_block_awake(hw, sta, true);
2829                 break;
2830         case STA_NOTIFY_AWAKE:
2831                 WARN_ON(!sta_priv->client);
2832                 sta_priv->asleep = false;
2833                 sta_id = iwl_find_station(priv, sta->addr);
2834                 if (sta_id != IWL_INVALID_STATION)
2835                         iwl_sta_modify_ps_wake(priv, sta_id);
2836                 break;
2837         default:
2838                 break;
2839         }
2840 }
2841
2842 /*****************************************************************************
2843  *
2844  * sysfs attributes
2845  *
2846  *****************************************************************************/
2847
2848 #ifdef CONFIG_IWLWIFI_DEBUG
2849
2850 /*
2851  * The following adds a new attribute to the sysfs representation
2852  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2853  * used for controlling the debug level.
2854  *
2855  * See the level definitions in iwl for details.
2856  *
2857  * The debug_level being managed using sysfs below is a per device debug
2858  * level that is used instead of the global debug level if it (the per
2859  * device debug level) is set.
2860  */
2861 static ssize_t show_debug_level(struct device *d,
2862                                 struct device_attribute *attr, char *buf)
2863 {
2864         struct iwl_priv *priv = dev_get_drvdata(d);
2865         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
2866 }
2867 static ssize_t store_debug_level(struct device *d,
2868                                 struct device_attribute *attr,
2869                                  const char *buf, size_t count)
2870 {
2871         struct iwl_priv *priv = dev_get_drvdata(d);
2872         unsigned long val;
2873         int ret;
2874
2875         ret = strict_strtoul(buf, 0, &val);
2876         if (ret)
2877                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2878         else {
2879                 priv->debug_level = val;
2880                 if (iwl_alloc_traffic_mem(priv))
2881                         IWL_ERR(priv,
2882                                 "Not enough memory to generate traffic log\n");
2883         }
2884         return strnlen(buf, count);
2885 }
2886
2887 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2888                         show_debug_level, store_debug_level);
2889
2890
2891 #endif /* CONFIG_IWLWIFI_DEBUG */
2892
2893
2894 static ssize_t show_temperature(struct device *d,
2895                                 struct device_attribute *attr, char *buf)
2896 {
2897         struct iwl_priv *priv = dev_get_drvdata(d);
2898
2899         if (!iwl_is_alive(priv))
2900                 return -EAGAIN;
2901
2902         return sprintf(buf, "%d\n", priv->temperature);
2903 }
2904
2905 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2906
2907 static ssize_t show_tx_power(struct device *d,
2908                              struct device_attribute *attr, char *buf)
2909 {
2910         struct iwl_priv *priv = dev_get_drvdata(d);
2911
2912         if (!iwl_is_ready_rf(priv))
2913                 return sprintf(buf, "off\n");
2914         else
2915                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2916 }
2917
2918 static ssize_t store_tx_power(struct device *d,
2919                               struct device_attribute *attr,
2920                               const char *buf, size_t count)
2921 {
2922         struct iwl_priv *priv = dev_get_drvdata(d);
2923         unsigned long val;
2924         int ret;
2925
2926         ret = strict_strtoul(buf, 10, &val);
2927         if (ret)
2928                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2929         else {
2930                 ret = iwl_set_tx_power(priv, val, false);
2931                 if (ret)
2932                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
2933                                 ret);
2934                 else
2935                         ret = count;
2936         }
2937         return ret;
2938 }
2939
2940 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2941
2942 static ssize_t show_flags(struct device *d,
2943                           struct device_attribute *attr, char *buf)
2944 {
2945         struct iwl_priv *priv = dev_get_drvdata(d);
2946
2947         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2948 }
2949
2950 static ssize_t store_flags(struct device *d,
2951                            struct device_attribute *attr,
2952                            const char *buf, size_t count)
2953 {
2954         struct iwl_priv *priv = dev_get_drvdata(d);
2955         unsigned long val;
2956         u32 flags;
2957         int ret = strict_strtoul(buf, 0, &val);
2958         if (ret)
2959                 return ret;
2960         flags = (u32)val;
2961
2962         mutex_lock(&priv->mutex);
2963         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2964                 /* Cancel any currently running scans... */
2965                 if (iwl_scan_cancel_timeout(priv, 100))
2966                         IWL_WARN(priv, "Could not cancel scan.\n");
2967                 else {
2968                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2969                         priv->staging_rxon.flags = cpu_to_le32(flags);
2970                         iwlcore_commit_rxon(priv);
2971                 }
2972         }
2973         mutex_unlock(&priv->mutex);
2974
2975         return count;
2976 }
2977
2978 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2979
2980 static ssize_t show_filter_flags(struct device *d,
2981                                  struct device_attribute *attr, char *buf)
2982 {
2983         struct iwl_priv *priv = dev_get_drvdata(d);
2984
2985         return sprintf(buf, "0x%04X\n",
2986                 le32_to_cpu(priv->active_rxon.filter_flags));
2987 }
2988
2989 static ssize_t store_filter_flags(struct device *d,
2990                                   struct device_attribute *attr,
2991                                   const char *buf, size_t count)
2992 {
2993         struct iwl_priv *priv = dev_get_drvdata(d);
2994         unsigned long val;
2995         u32 filter_flags;
2996         int ret = strict_strtoul(buf, 0, &val);
2997         if (ret)
2998                 return ret;
2999         filter_flags = (u32)val;
3000
3001         mutex_lock(&priv->mutex);
3002         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3003                 /* Cancel any currently running scans... */
3004                 if (iwl_scan_cancel_timeout(priv, 100))
3005                         IWL_WARN(priv, "Could not cancel scan.\n");
3006                 else {
3007                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3008                                        "0x%04X\n", filter_flags);
3009                         priv->staging_rxon.filter_flags =
3010                                 cpu_to_le32(filter_flags);
3011                         iwlcore_commit_rxon(priv);
3012                 }
3013         }
3014         mutex_unlock(&priv->mutex);
3015
3016         return count;
3017 }
3018
3019 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3020                    store_filter_flags);
3021
3022
3023 static ssize_t show_statistics(struct device *d,
3024                                struct device_attribute *attr, char *buf)
3025 {
3026         struct iwl_priv *priv = dev_get_drvdata(d);
3027         u32 size = sizeof(struct iwl_notif_statistics);
3028         u32 len = 0, ofs = 0;
3029         u8 *data = (u8 *)&priv->statistics;
3030         int rc = 0;
3031
3032         if (!iwl_is_alive(priv))
3033                 return -EAGAIN;
3034
3035         mutex_lock(&priv->mutex);
3036         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3037         mutex_unlock(&priv->mutex);
3038
3039         if (rc) {
3040                 len = sprintf(buf,
3041                               "Error sending statistics request: 0x%08X\n", rc);
3042                 return len;
3043         }
3044
3045         while (size && (PAGE_SIZE - len)) {
3046                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3047                                    PAGE_SIZE - len, 1);
3048                 len = strlen(buf);
3049                 if (PAGE_SIZE - len)
3050                         buf[len++] = '\n';
3051
3052                 ofs += 16;
3053                 size -= min(size, 16U);
3054         }
3055
3056         return len;
3057 }
3058
3059 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3060
3061 static ssize_t show_rts_ht_protection(struct device *d,
3062                              struct device_attribute *attr, char *buf)
3063 {
3064         struct iwl_priv *priv = dev_get_drvdata(d);
3065
3066         return sprintf(buf, "%s\n",
3067                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3068 }
3069
3070 static ssize_t store_rts_ht_protection(struct device *d,
3071                               struct device_attribute *attr,
3072                               const char *buf, size_t count)
3073 {
3074         struct iwl_priv *priv = dev_get_drvdata(d);
3075         unsigned long val;
3076         int ret;
3077
3078         ret = strict_strtoul(buf, 10, &val);
3079         if (ret)
3080                 IWL_INFO(priv, "Input is not in decimal form.\n");
3081         else {
3082                 if (!iwl_is_associated(priv))
3083                         priv->cfg->use_rts_for_ht = val ? true : false;
3084                 else
3085                         IWL_ERR(priv, "Sta associated with AP - "
3086                                 "Change protection mechanism is not allowed\n");
3087                 ret = count;
3088         }
3089         return ret;
3090 }
3091
3092 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3093                         show_rts_ht_protection, store_rts_ht_protection);
3094
3095
3096 /*****************************************************************************
3097  *
3098  * driver setup and teardown
3099  *
3100  *****************************************************************************/
3101
3102 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3103 {
3104         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3105
3106         init_waitqueue_head(&priv->wait_command_queue);
3107
3108         INIT_WORK(&priv->up, iwl_bg_up);
3109         INIT_WORK(&priv->restart, iwl_bg_restart);
3110         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3111         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3112         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3113         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3114         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3115
3116         iwl_setup_scan_deferred_work(priv);
3117
3118         if (priv->cfg->ops->lib->setup_deferred_work)
3119                 priv->cfg->ops->lib->setup_deferred_work(priv);
3120
3121         init_timer(&priv->statistics_periodic);
3122         priv->statistics_periodic.data = (unsigned long)priv;
3123         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3124
3125         if (!priv->cfg->use_isr_legacy)
3126                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3127                         iwl_irq_tasklet, (unsigned long)priv);
3128         else
3129                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3130                         iwl_irq_tasklet_legacy, (unsigned long)priv);
3131 }
3132
3133 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3134 {
3135         if (priv->cfg->ops->lib->cancel_deferred_work)
3136                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3137
3138         cancel_delayed_work_sync(&priv->init_alive_start);
3139         cancel_delayed_work(&priv->scan_check);
3140         cancel_delayed_work(&priv->alive_start);
3141         cancel_work_sync(&priv->beacon_update);
3142         del_timer_sync(&priv->statistics_periodic);
3143 }
3144
3145 static void iwl_init_hw_rates(struct iwl_priv *priv,
3146                               struct ieee80211_rate *rates)
3147 {
3148         int i;
3149
3150         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3151                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3152                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3153                 rates[i].hw_value_short = i;
3154                 rates[i].flags = 0;
3155                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3156                         /*
3157                          * If CCK != 1M then set short preamble rate flag.
3158                          */
3159                         rates[i].flags |=
3160                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3161                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3162                 }
3163         }
3164 }
3165
3166 static int iwl_init_drv(struct iwl_priv *priv)
3167 {
3168         int ret;
3169
3170         priv->ibss_beacon = NULL;
3171
3172         spin_lock_init(&priv->lock);
3173         spin_lock_init(&priv->sta_lock);
3174         spin_lock_init(&priv->hcmd_lock);
3175
3176         INIT_LIST_HEAD(&priv->free_frames);
3177
3178         mutex_init(&priv->mutex);
3179
3180         /* Clear the driver's (not device's) station table */
3181         iwl_clear_stations_table(priv);
3182
3183         priv->ieee_channels = NULL;
3184         priv->ieee_rates = NULL;
3185         priv->band = IEEE80211_BAND_2GHZ;
3186
3187         priv->iw_mode = NL80211_IFTYPE_STATION;
3188
3189         /* Choose which receivers/antennas to use */
3190         if (priv->cfg->ops->hcmd->set_rxon_chain)
3191                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3192
3193         iwl_init_scan_params(priv);
3194
3195         iwl_reset_qos(priv);
3196
3197         priv->qos_data.qos_active = 0;
3198         priv->qos_data.qos_cap.val = 0;
3199
3200         priv->rates_mask = IWL_RATES_MASK;
3201         /* Set the tx_power_user_lmt to the lowest power level
3202          * this value will get overwritten by channel max power avg
3203          * from eeprom */
3204         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
3205
3206         ret = iwl_init_channel_map(priv);
3207         if (ret) {
3208                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3209                 goto err;
3210         }
3211
3212         ret = iwlcore_init_geos(priv);
3213         if (ret) {
3214                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3215                 goto err_free_channel_map;
3216         }
3217         iwl_init_hw_rates(priv, priv->ieee_rates);
3218
3219         return 0;
3220
3221 err_free_channel_map:
3222         iwl_free_channel_map(priv);
3223 err:
3224         return ret;
3225 }
3226
3227 static void iwl_uninit_drv(struct iwl_priv *priv)
3228 {
3229         iwl_calib_free_results(priv);
3230         iwlcore_free_geos(priv);
3231         iwl_free_channel_map(priv);
3232         kfree(priv->scan);
3233 }
3234
3235 static struct attribute *iwl_sysfs_entries[] = {
3236         &dev_attr_flags.attr,
3237         &dev_attr_filter_flags.attr,
3238         &dev_attr_statistics.attr,
3239         &dev_attr_temperature.attr,
3240         &dev_attr_tx_power.attr,
3241         &dev_attr_rts_ht_protection.attr,
3242 #ifdef CONFIG_IWLWIFI_DEBUG
3243         &dev_attr_debug_level.attr,
3244 #endif
3245         NULL
3246 };
3247
3248 static struct attribute_group iwl_attribute_group = {
3249         .name = NULL,           /* put in device directory */
3250         .attrs = iwl_sysfs_entries,
3251 };
3252
3253 static struct ieee80211_ops iwl_hw_ops = {
3254         .tx = iwl_mac_tx,
3255         .start = iwl_mac_start,
3256         .stop = iwl_mac_stop,
3257         .add_interface = iwl_mac_add_interface,
3258         .remove_interface = iwl_mac_remove_interface,
3259         .config = iwl_mac_config,
3260         .configure_filter = iwl_configure_filter,
3261         .set_key = iwl_mac_set_key,
3262         .update_tkip_key = iwl_mac_update_tkip_key,
3263         .get_stats = iwl_mac_get_stats,
3264         .get_tx_stats = iwl_mac_get_tx_stats,
3265         .conf_tx = iwl_mac_conf_tx,
3266         .reset_tsf = iwl_mac_reset_tsf,
3267         .bss_info_changed = iwl_bss_info_changed,
3268         .ampdu_action = iwl_mac_ampdu_action,
3269         .hw_scan = iwl_mac_hw_scan,
3270         .sta_notify = iwl_mac_sta_notify,
3271 };
3272
3273 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3274 {
3275         int err = 0;
3276         struct iwl_priv *priv;
3277         struct ieee80211_hw *hw;
3278         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3279         unsigned long flags;
3280         u16 pci_cmd;
3281
3282         /************************
3283          * 1. Allocating HW data
3284          ************************/
3285
3286         /* Disabling hardware scan means that mac80211 will perform scans
3287          * "the hard way", rather than using device's scan. */
3288         if (cfg->mod_params->disable_hw_scan) {
3289                 if (iwl_debug_level & IWL_DL_INFO)
3290                         dev_printk(KERN_DEBUG, &(pdev->dev),
3291                                    "Disabling hw_scan\n");
3292                 iwl_hw_ops.hw_scan = NULL;
3293         }
3294
3295         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3296         if (!hw) {
3297                 err = -ENOMEM;
3298                 goto out;
3299         }
3300         priv = hw->priv;
3301         /* At this point both hw and priv are allocated. */
3302
3303         SET_IEEE80211_DEV(hw, &pdev->dev);
3304
3305         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3306         priv->cfg = cfg;
3307         priv->pci_dev = pdev;
3308         priv->inta_mask = CSR_INI_SET_MASK;
3309
3310 #ifdef CONFIG_IWLWIFI_DEBUG
3311         atomic_set(&priv->restrict_refcnt, 0);
3312 #endif
3313         if (iwl_alloc_traffic_mem(priv))
3314                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3315
3316         /**************************
3317          * 2. Initializing PCI bus
3318          **************************/
3319         if (pci_enable_device(pdev)) {
3320                 err = -ENODEV;
3321                 goto out_ieee80211_free_hw;
3322         }
3323
3324         pci_set_master(pdev);
3325
3326         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3327         if (!err)
3328                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3329         if (err) {
3330                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3331                 if (!err)
3332                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3333                 /* both attempts failed: */
3334                 if (err) {
3335                         IWL_WARN(priv, "No suitable DMA available.\n");
3336                         goto out_pci_disable_device;
3337                 }
3338         }
3339
3340         err = pci_request_regions(pdev, DRV_NAME);
3341         if (err)
3342                 goto out_pci_disable_device;
3343
3344         pci_set_drvdata(pdev, priv);
3345
3346
3347         /***********************
3348          * 3. Read REV register
3349          ***********************/
3350         priv->hw_base = pci_iomap(pdev, 0, 0);
3351         if (!priv->hw_base) {
3352                 err = -ENODEV;
3353                 goto out_pci_release_regions;
3354         }
3355
3356         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3357                 (unsigned long long) pci_resource_len(pdev, 0));
3358         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3359
3360         /* this spin lock will be used in apm_ops.init and EEPROM access
3361          * we should init now
3362          */
3363         spin_lock_init(&priv->reg_lock);
3364         iwl_hw_detect(priv);
3365         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3366                 priv->cfg->name, priv->hw_rev);
3367
3368         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3369          * PCI Tx retries from interfering with C3 CPU state */
3370         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3371
3372         iwl_prepare_card_hw(priv);
3373         if (!priv->hw_ready) {
3374                 IWL_WARN(priv, "Failed, HW not ready\n");
3375                 goto out_iounmap;
3376         }
3377
3378         /*****************
3379          * 4. Read EEPROM
3380          *****************/
3381         /* Read the EEPROM */
3382         err = iwl_eeprom_init(priv);
3383         if (err) {
3384                 IWL_ERR(priv, "Unable to init EEPROM\n");
3385                 goto out_iounmap;
3386         }
3387         err = iwl_eeprom_check_version(priv);
3388         if (err)
3389                 goto out_free_eeprom;
3390
3391         /* extract MAC Address */
3392         iwl_eeprom_get_mac(priv, priv->mac_addr);
3393         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3394         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3395
3396         /************************
3397          * 5. Setup HW constants
3398          ************************/
3399         if (iwl_set_hw_params(priv)) {
3400                 IWL_ERR(priv, "failed to set hw parameters\n");
3401                 goto out_free_eeprom;
3402         }
3403
3404         /*******************
3405          * 6. Setup priv
3406          *******************/
3407
3408         err = iwl_init_drv(priv);
3409         if (err)
3410                 goto out_free_eeprom;
3411         /* At this point both hw and priv are initialized. */
3412
3413         /********************
3414          * 7. Setup services
3415          ********************/
3416         spin_lock_irqsave(&priv->lock, flags);
3417         iwl_disable_interrupts(priv);
3418         spin_unlock_irqrestore(&priv->lock, flags);
3419
3420         pci_enable_msi(priv->pci_dev);
3421
3422         iwl_alloc_isr_ict(priv);
3423         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3424                           IRQF_SHARED, DRV_NAME, priv);
3425         if (err) {
3426                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3427                 goto out_disable_msi;
3428         }
3429         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3430         if (err) {
3431                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3432                 goto out_free_irq;
3433         }
3434
3435         iwl_setup_deferred_work(priv);
3436         iwl_setup_rx_handlers(priv);
3437
3438         /**********************************
3439          * 8. Setup and register mac80211
3440          **********************************/
3441
3442         /* enable interrupts if needed: hw bug w/a */
3443         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3444         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3445                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3446                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3447         }
3448
3449         iwl_enable_interrupts(priv);
3450
3451         err = iwl_setup_mac(priv);
3452         if (err)
3453                 goto out_remove_sysfs;
3454
3455         err = iwl_dbgfs_register(priv, DRV_NAME);
3456         if (err)
3457                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3458
3459         /* If platform's RF_KILL switch is NOT set to KILL */
3460         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3461                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3462         else
3463                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3464
3465         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3466                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3467
3468         iwl_power_initialize(priv);
3469         iwl_tt_initialize(priv);
3470         return 0;
3471
3472  out_remove_sysfs:
3473         destroy_workqueue(priv->workqueue);
3474         priv->workqueue = NULL;
3475         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3476  out_free_irq:
3477         free_irq(priv->pci_dev->irq, priv);
3478         iwl_free_isr_ict(priv);
3479  out_disable_msi:
3480         pci_disable_msi(priv->pci_dev);
3481         iwl_uninit_drv(priv);
3482  out_free_eeprom:
3483         iwl_eeprom_free(priv);
3484  out_iounmap:
3485         pci_iounmap(pdev, priv->hw_base);
3486  out_pci_release_regions:
3487         pci_set_drvdata(pdev, NULL);
3488         pci_release_regions(pdev);
3489  out_pci_disable_device:
3490         pci_disable_device(pdev);
3491  out_ieee80211_free_hw:
3492         iwl_free_traffic_mem(priv);
3493         ieee80211_free_hw(priv->hw);
3494  out:
3495         return err;
3496 }
3497
3498 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3499 {
3500         struct iwl_priv *priv = pci_get_drvdata(pdev);
3501         unsigned long flags;
3502
3503         if (!priv)
3504                 return;
3505
3506         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3507
3508         iwl_dbgfs_unregister(priv);
3509         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3510
3511         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3512          * to be called and iwl_down since we are removing the device
3513          * we need to set STATUS_EXIT_PENDING bit.
3514          */
3515         set_bit(STATUS_EXIT_PENDING, &priv->status);
3516         if (priv->mac80211_registered) {
3517                 ieee80211_unregister_hw(priv->hw);
3518                 priv->mac80211_registered = 0;
3519         } else {
3520                 iwl_down(priv);
3521         }
3522
3523         /*
3524          * Make sure device is reset to low power before unloading driver.
3525          * This may be redundant with iwl_down(), but there are paths to
3526          * run iwl_down() without calling apm_ops.stop(), and there are
3527          * paths to avoid running iwl_down() at all before leaving driver.
3528          * This (inexpensive) call *makes sure* device is reset.
3529          */
3530         priv->cfg->ops->lib->apm_ops.stop(priv);
3531
3532         iwl_tt_exit(priv);
3533
3534         /* make sure we flush any pending irq or
3535          * tasklet for the driver
3536          */
3537         spin_lock_irqsave(&priv->lock, flags);
3538         iwl_disable_interrupts(priv);
3539         spin_unlock_irqrestore(&priv->lock, flags);
3540
3541         iwl_synchronize_irq(priv);
3542
3543         iwl_dealloc_ucode_pci(priv);
3544
3545         if (priv->rxq.bd)
3546                 iwl_rx_queue_free(priv, &priv->rxq);
3547         iwl_hw_txq_ctx_free(priv);
3548
3549         iwl_clear_stations_table(priv);
3550         iwl_eeprom_free(priv);
3551
3552
3553         /*netif_stop_queue(dev); */
3554         flush_workqueue(priv->workqueue);
3555
3556         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3557          * priv->workqueue... so we can't take down the workqueue
3558          * until now... */
3559         destroy_workqueue(priv->workqueue);
3560         priv->workqueue = NULL;
3561         iwl_free_traffic_mem(priv);
3562
3563         free_irq(priv->pci_dev->irq, priv);
3564         pci_disable_msi(priv->pci_dev);
3565         pci_iounmap(pdev, priv->hw_base);
3566         pci_release_regions(pdev);
3567         pci_disable_device(pdev);
3568         pci_set_drvdata(pdev, NULL);
3569
3570         iwl_uninit_drv(priv);
3571
3572         iwl_free_isr_ict(priv);
3573
3574         if (priv->ibss_beacon)
3575                 dev_kfree_skb(priv->ibss_beacon);
3576
3577         ieee80211_free_hw(priv->hw);
3578 }
3579
3580
3581 /*****************************************************************************
3582  *
3583  * driver and module entry point
3584  *
3585  *****************************************************************************/
3586
3587 /* Hardware specific file defines the PCI IDs table for that hardware module */
3588 static struct pci_device_id iwl_hw_card_ids[] = {
3589 #ifdef CONFIG_IWL4965
3590         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3591         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3592 #endif /* CONFIG_IWL4965 */
3593 #ifdef CONFIG_IWL5000
3594 /* 5100 Series WiFi */
3595         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
3596         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
3597         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
3598         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
3599         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
3600         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
3601         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
3602         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
3603         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
3604         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
3605         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
3606         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
3607         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
3608         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
3609         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
3610         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
3611         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
3612         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
3613         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
3614         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
3615         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
3616         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
3617         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
3618         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
3619
3620 /* 5300 Series WiFi */
3621         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
3622         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
3623         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
3624         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
3625         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
3626         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
3627         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
3628         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
3629         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
3630         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
3631         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
3632         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
3633
3634 /* 5350 Series WiFi/WiMax */
3635         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
3636         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
3637         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
3638
3639 /* 5150 Series Wifi/WiMax */
3640         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
3641         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
3642         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
3643         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
3644         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
3645         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
3646
3647         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
3648         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
3649         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
3650         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
3651
3652 /* 6x00 Series */
3653         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3654         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3655         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3656         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3657         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3658         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3659         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3660         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3661         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3662         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3663
3664 /* 6x50 WiFi/WiMax Series */
3665         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3666         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3667         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3668         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3669         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3670         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3671
3672 /* 1000 Series WiFi */
3673         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3674         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3675         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3676         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3677         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3678         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3679         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3680         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3681         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3682         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3683         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3684         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3685 #endif /* CONFIG_IWL5000 */
3686
3687         {0}
3688 };
3689 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3690
3691 static struct pci_driver iwl_driver = {
3692         .name = DRV_NAME,
3693         .id_table = iwl_hw_card_ids,
3694         .probe = iwl_pci_probe,
3695         .remove = __devexit_p(iwl_pci_remove),
3696 #ifdef CONFIG_PM
3697         .suspend = iwl_pci_suspend,
3698         .resume = iwl_pci_resume,
3699 #endif
3700 };
3701
3702 static int __init iwl_init(void)
3703 {
3704
3705         int ret;
3706         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3707         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3708
3709         ret = iwlagn_rate_control_register();
3710         if (ret) {
3711                 printk(KERN_ERR DRV_NAME
3712                        "Unable to register rate control algorithm: %d\n", ret);
3713                 return ret;
3714         }
3715
3716         ret = pci_register_driver(&iwl_driver);
3717         if (ret) {
3718                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3719                 goto error_register;
3720         }
3721
3722         return ret;
3723
3724 error_register:
3725         iwlagn_rate_control_unregister();
3726         return ret;
3727 }
3728
3729 static void __exit iwl_exit(void)
3730 {
3731         pci_unregister_driver(&iwl_driver);
3732         iwlagn_rate_control_unregister();
3733 }
3734
3735 module_exit(iwl_exit);
3736 module_init(iwl_init);
3737
3738 #ifdef CONFIG_IWLWIFI_DEBUG
3739 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3740 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3741 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3742 MODULE_PARM_DESC(debug, "debug output mask");
3743 #endif
3744