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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #define DRV_NAME        "iwlagn"
  48
  49 #include "iwl-eeprom.h"
  50 #include "iwl-dev.h"
  51 #include "iwl-core.h"
  52 #include "iwl-io.h"
  53 #include "iwl-helpers.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-calib.h"
  56
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  76 #define VS "s"
  77 #else
  78 #define VS
  79 #endif
  80
  81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("iwl4965");
  89
  90 /*************** STATION TABLE MANAGEMENT ****
  91  * mac80211 should be examined to determine if sta_info is duplicating
  92  * the functionality provided here
  93  */
  94
  95 /**************************************************************/
  96
  97 /**
  98  * iwl_commit_rxon - commit staging_rxon to hardware
  99  *
 100  * The RXON command in staging_rxon is committed to the hardware and
 101  * the active_rxon structure is updated with the new data.  This
 102  * function correctly transitions out of the RXON_ASSOC_MSK state if
 103  * a HW tune is required based on the RXON structure changes.
 104  */
 105 int iwl_commit_rxon(struct iwl_priv *priv)
 106 {
 107         /* cast away the const for active_rxon in this function */
 108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 109         int ret;
 110         bool new_assoc =
 111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 112
 113         if (!iwl_is_alive(priv))
 114                 return -EBUSY;
 115
 116         /* always get timestamp with Rx frame */
 117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 118
 119         ret = iwl_check_rxon_cmd(priv);
 120         if (ret) {
 121                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 122                 return -EINVAL;
 123         }
 124
 125         /*
 126          * receive commit_rxon request
 127          * abort any previous channel switch if still in process
 128          */
 129         if (priv->switch_rxon.switch_in_progress &&
 130             (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
 131                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 132                       le16_to_cpu(priv->switch_rxon.channel));
 133                 priv->switch_rxon.switch_in_progress = false;
 134         }
 135
 136         /* If we don't need to send a full RXON, we can use
 137          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 138          * and other flags for the current radio configuration. */
 139         if (!iwl_full_rxon_required(priv)) {
 140                 ret = iwl_send_rxon_assoc(priv);
 141                 if (ret) {
 142                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 143                         return ret;
 144                 }
 145
 146                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 147                 iwl_print_rx_config_cmd(priv);
 148                 return 0;
 149         }
 150
 151         /* station table will be cleared */
 152         priv->assoc_station_added = 0;
 153
 154         /* If we are currently associated and the new config requires
 155          * an RXON_ASSOC and the new config wants the associated mask enabled,
 156          * we must clear the associated from the active configuration
 157          * before we apply the new config */
 158         if (iwl_is_associated(priv) && new_assoc) {
 159                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 160                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 161
 162                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 163                                       sizeof(struct iwl_rxon_cmd),
 164                                       &priv->active_rxon);
 165
 166                 /* If the mask clearing failed then we set
 167                  * active_rxon back to what it was previously */
 168                 if (ret) {
 169                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 170                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 171                         return ret;
 172                 }
 173         }
 174
 175         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 176                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 177                        "* channel = %d\n"
 178                        "* bssid = %pM\n",
 179                        (new_assoc ? "" : "out"),
 180                        le16_to_cpu(priv->staging_rxon.channel),
 181                        priv->staging_rxon.bssid_addr);
 182
 183         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 184
 185         /* Apply the new configuration
 186          * RXON unassoc clears the station table in uCode, send it before
 187          * we add the bcast station. If assoc bit is set, we will send RXON
 188          * after having added the bcast and bssid station.
 189          */
 190         if (!new_assoc) {
 191                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 192                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 193                 if (ret) {
 194                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 195                         return ret;
 196                 }
 197                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 198         }
 199
 200         iwl_clear_stations_table(priv);
 201
 202         priv->start_calib = 0;
 203
 204         /* Add the broadcast address so we can send broadcast frames */
 205         iwl_add_bcast_station(priv);
 206
 207         /* If we have set the ASSOC_MSK and we are in BSS mode then
 208          * add the IWL_AP_ID to the station rate table */
 209         if (new_assoc) {
 210                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 211                         ret = iwl_rxon_add_station(priv,
 212                                            priv->active_rxon.bssid_addr, 1);
 213                         if (ret == IWL_INVALID_STATION) {
 214                                 IWL_ERR(priv,
 215                                         "Error adding AP address for TX.\n");
 216                                 return -EIO;
 217                         }
 218                         priv->assoc_station_added = 1;
 219                         if (priv->default_wep_key &&
 220                             iwl_send_static_wepkey_cmd(priv, 0))
 221                                 IWL_ERR(priv,
 222                                         "Could not send WEP static key.\n");
 223                 }
 224
 225                 /*
 226                  * allow CTS-to-self if possible for new association.
 227                  * this is relevant only for 5000 series and up,
 228                  * but will not damage 4965
 229                  */
 230                 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 231
 232                 /* Apply the new configuration
 233                  * RXON assoc doesn't clear the station table in uCode,
 234                  */
 235                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 236                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 237                 if (ret) {
 238                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 239                         return ret;
 240                 }
 241                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 242         }
 243         iwl_print_rx_config_cmd(priv);
 244
 245         iwl_init_sensitivity(priv);
 246
 247         /* If we issue a new RXON command which required a tune then we must
 248          * send a new TXPOWER command or we won't be able to Tx any frames */
 249         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 250         if (ret) {
 251                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 252                 return ret;
 253         }
 254
 255         return 0;
 256 }
 257
 258 void iwl_update_chain_flags(struct iwl_priv *priv)
 259 {
 260
 261         if (priv->cfg->ops->hcmd->set_rxon_chain)
 262                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 263         iwlcore_commit_rxon(priv);
 264 }
 265
 266 static void iwl_clear_free_frames(struct iwl_priv *priv)
 267 {
 268         struct list_head *element;
 269
 270         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 271                        priv->frames_count);
 272
 273         while (!list_empty(&priv->free_frames)) {
 274                 element = priv->free_frames.next;
 275                 list_del(element);
 276                 kfree(list_entry(element, struct iwl_frame, list));
 277                 priv->frames_count--;
 278         }
 279
 280         if (priv->frames_count) {
 281                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 282                             priv->frames_count);
 283                 priv->frames_count = 0;
 284         }
 285 }
 286
 287 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 288 {
 289         struct iwl_frame *frame;
 290         struct list_head *element;
 291         if (list_empty(&priv->free_frames)) {
 292                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 293                 if (!frame) {
 294                         IWL_ERR(priv, "Could not allocate frame!\n");
 295                         return NULL;
 296                 }
 297
 298                 priv->frames_count++;
 299                 return frame;
 300         }
 301
 302         element = priv->free_frames.next;
 303         list_del(element);
 304         return list_entry(element, struct iwl_frame, list);
 305 }
 306
 307 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 308 {
 309         memset(frame, 0, sizeof(*frame));
 310         list_add(&frame->list, &priv->free_frames);
 311 }
 312
 313 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
 314                                           struct ieee80211_hdr *hdr,
 315                                           int left)
 316 {
 317         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 318             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 319              (priv->iw_mode != NL80211_IFTYPE_AP)))
 320                 return 0;
 321
 322         if (priv->ibss_beacon->len > left)
 323                 return 0;
 324
 325         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 326
 327         return priv->ibss_beacon->len;
 328 }
 329
 330 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 331 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 332                 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 333                 u8 *beacon, u32 frame_size)
 334 {
 335         u16 tim_idx;
 336         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 337
 338         /*
 339          * The index is relative to frame start but we start looking at the
 340          * variable-length part of the beacon.
 341          */
 342         tim_idx = mgmt->u.beacon.variable - beacon;
 343
 344         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 345         while ((tim_idx < (frame_size - 2)) &&
 346                         (beacon[tim_idx] != WLAN_EID_TIM))
 347                 tim_idx += beacon[tim_idx+1] + 2;
 348
 349         /* If TIM field was found, set variables */
 350         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 351                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 352                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 353         } else
 354                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 355 }
 356
 357 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 358                                        struct iwl_frame *frame)
 359 {
 360         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 361         u32 frame_size;
 362         u32 rate_flags;
 363         u32 rate;
 364         /*
 365          * We have to set up the TX command, the TX Beacon command, and the
 366          * beacon contents.
 367          */
 368
 369         /* Initialize memory */
 370         tx_beacon_cmd = &frame->u.beacon;
 371         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 372
 373         /* Set up TX beacon contents */
 374         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 375                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 376         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
 377                 return 0;
 378
 379         /* Set up TX command fields */
 380         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 381         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 382         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 383         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 384                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 385
 386         /* Set up TX beacon command fields */
 387         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
 388                         frame_size);
 389
 390         /* Set up packet rate and flags */
 391         rate = iwl_rate_get_lowest_plcp(priv);
 392         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
 393         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 394         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
 395                 rate_flags |= RATE_MCS_CCK_MSK;
 396         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
 397                         rate_flags);
 398
 399         return sizeof(*tx_beacon_cmd) + frame_size;
 400 }
 401 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 402 {
 403         struct iwl_frame *frame;
 404         unsigned int frame_size;
 405         int rc;
 406
 407         frame = iwl_get_free_frame(priv);
 408         if (!frame) {
 409                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 410                           "command.\n");
 411                 return -ENOMEM;
 412         }
 413
 414         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
 415         if (!frame_size) {
 416                 IWL_ERR(priv, "Error configuring the beacon command\n");
 417                 iwl_free_frame(priv, frame);
 418                 return -EINVAL;
 419         }
 420
 421         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 422                               &frame->u.cmd[0]);
 423
 424         iwl_free_frame(priv, frame);
 425
 426         return rc;
 427 }
 428
 429 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 430 {
 431         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 432
 433         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 434         if (sizeof(dma_addr_t) > sizeof(u32))
 435                 addr |=
 436                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 437
 438         return addr;
 439 }
 440
 441 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 442 {
 443         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 444
 445         return le16_to_cpu(tb->hi_n_len) >> 4;
 446 }
 447
 448 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 449                                   dma_addr_t addr, u16 len)
 450 {
 451         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 452         u16 hi_n_len = len << 4;
 453
 454         put_unaligned_le32(addr, &tb->lo);
 455         if (sizeof(dma_addr_t) > sizeof(u32))
 456                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 457
 458         tb->hi_n_len = cpu_to_le16(hi_n_len);
 459
 460         tfd->num_tbs = idx + 1;
 461 }
 462
 463 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 464 {
 465         return tfd->num_tbs & 0x1f;
 466 }
 467
 468 /**
 469  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 470  * @priv - driver private data
 471  * @txq - tx queue
 472  *
 473  * Does NOT advance any TFD circular buffer read/write indexes
 474  * Does NOT free the TFD itself (which is within circular buffer)
 475  */
 476 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 477 {
 478         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 479         struct iwl_tfd *tfd;
 480         struct pci_dev *dev = priv->pci_dev;
 481         int index = txq->q.read_ptr;
 482         int i;
 483         int num_tbs;
 484
 485         tfd = &tfd_tmp[index];
 486
 487         /* Sanity check on number of chunks */
 488         num_tbs = iwl_tfd_get_num_tbs(tfd);
 489
 490         if (num_tbs >= IWL_NUM_OF_TBS) {
 491                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 492                 /* @todo issue fatal error, it is quite serious situation */
 493                 return;
 494         }
 495
 496         /* Unmap tx_cmd */
 497         if (num_tbs)
 498                 pci_unmap_single(dev,
 499                                 pci_unmap_addr(&txq->meta[index], mapping),
 500                                 pci_unmap_len(&txq->meta[index], len),
 501                                 PCI_DMA_BIDIRECTIONAL);
 502
 503         /* Unmap chunks, if any. */
 504         for (i = 1; i < num_tbs; i++) {
 505                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 506                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 507
 508                 if (txq->txb) {
 509                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 510                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 511                 }
 512         }
 513 }
 514
 515 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 516                                  struct iwl_tx_queue *txq,
 517                                  dma_addr_t addr, u16 len,
 518                                  u8 reset, u8 pad)
 519 {
 520         struct iwl_queue *q;
 521         struct iwl_tfd *tfd, *tfd_tmp;
 522         u32 num_tbs;
 523
 524         q = &txq->q;
 525         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 526         tfd = &tfd_tmp[q->write_ptr];
 527
 528         if (reset)
 529                 memset(tfd, 0, sizeof(*tfd));
 530
 531         num_tbs = iwl_tfd_get_num_tbs(tfd);
 532
 533         /* Each TFD can point to a maximum 20 Tx buffers */
 534         if (num_tbs >= IWL_NUM_OF_TBS) {
 535                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 536                           IWL_NUM_OF_TBS);
 537                 return -EINVAL;
 538         }
 539
 540         BUG_ON(addr & ~DMA_BIT_MASK(36));
 541         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 542                 IWL_ERR(priv, "Unaligned address = %llx\n",
 543                           (unsigned long long)addr);
 544
 545         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 546
 547         return 0;
 548 }
 549
 550 /*
 551  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 552  * given Tx queue, and enable the DMA channel used for that queue.
 553  *
 554  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 555  * channels supported in hardware.
 556  */
 557 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 558                          struct iwl_tx_queue *txq)
 559 {
 560         int txq_id = txq->q.id;
 561
 562         /* Circular buffer (TFD queue in DRAM) physical base address */
 563         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 564                              txq->q.dma_addr >> 8);
 565
 566         return 0;
 567 }
 568
 569 /******************************************************************************
 570  *
 571  * Generic RX handler implementations
 572  *
 573  ******************************************************************************/
 574 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 575                                 struct iwl_rx_mem_buffer *rxb)
 576 {
 577         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 578         struct iwl_alive_resp *palive;
 579         struct delayed_work *pwork;
 580
 581         palive = &pkt->u.alive_frame;
 582
 583         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 584                        "0x%01X 0x%01X\n",
 585                        palive->is_valid, palive->ver_type,
 586                        palive->ver_subtype);
 587
 588         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 589                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 590                 memcpy(&priv->card_alive_init,
 591                        &pkt->u.alive_frame,
 592                        sizeof(struct iwl_init_alive_resp));
 593                 pwork = &priv->init_alive_start;
 594         } else {
 595                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 596                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 597                        sizeof(struct iwl_alive_resp));
 598                 pwork = &priv->alive_start;
 599         }
 600
 601         /* We delay the ALIVE response by 5ms to
 602          * give the HW RF Kill time to activate... */
 603         if (palive->is_valid == UCODE_VALID_OK)
 604                 queue_delayed_work(priv->workqueue, pwork,
 605                                    msecs_to_jiffies(5));
 606         else
 607                 IWL_WARN(priv, "uCode did not respond OK.\n");
 608 }
 609
 610 static void iwl_bg_beacon_update(struct work_struct *work)
 611 {
 612         struct iwl_priv *priv =
 613                 container_of(work, struct iwl_priv, beacon_update);
 614         struct sk_buff *beacon;
 615
 616         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 617         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 618
 619         if (!beacon) {
 620                 IWL_ERR(priv, "update beacon failed\n");
 621                 return;
 622         }
 623
 624         mutex_lock(&priv->mutex);
 625         /* new beacon skb is allocated every time; dispose previous.*/
 626         if (priv->ibss_beacon)
 627                 dev_kfree_skb(priv->ibss_beacon);
 628
 629         priv->ibss_beacon = beacon;
 630         mutex_unlock(&priv->mutex);
 631
 632         iwl_send_beacon_cmd(priv);
 633 }
 634
 635 /**
 636  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 637  *
 638  * This callback is provided in order to send a statistics request.
 639  *
 640  * This timer function is continually reset to execute within
 641  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 642  * was received.  We need to ensure we receive the statistics in order
 643  * to update the temperature used for calibrating the TXPOWER.
 644  */
 645 static void iwl_bg_statistics_periodic(unsigned long data)
 646 {
 647         struct iwl_priv *priv = (struct iwl_priv *)data;
 648
 649         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 650                 return;
 651
 652         /* dont send host command if rf-kill is on */
 653         if (!iwl_is_ready_rf(priv))
 654                 return;
 655
 656         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 657 }
 658
 659 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 660                                 struct iwl_rx_mem_buffer *rxb)
 661 {
 662 #ifdef CONFIG_IWLWIFI_DEBUG
 663         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 664         struct iwl4965_beacon_notif *beacon =
 665                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 666         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 667
 668         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 669                 "tsf %d %d rate %d\n",
 670                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 671                 beacon->beacon_notify_hdr.failure_frame,
 672                 le32_to_cpu(beacon->ibss_mgr_status),
 673                 le32_to_cpu(beacon->high_tsf),
 674                 le32_to_cpu(beacon->low_tsf), rate);
 675 #endif
 676
 677         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 678             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 679                 queue_work(priv->workqueue, &priv->beacon_update);
 680 }
 681
 682 /* Handle notification from uCode that card's power state is changing
 683  * due to software, hardware, or critical temperature RFKILL */
 684 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 685                                     struct iwl_rx_mem_buffer *rxb)
 686 {
 687         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 688         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 689         unsigned long status = priv->status;
 690
 691         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 692                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 693                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 694
 695         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 696                      RF_CARD_DISABLED)) {
 697
 698                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 699                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 700
 701                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 702                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 703
 704                 if (!(flags & RXON_CARD_DISABLED)) {
 705                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 706                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 707                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 708                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 709                 }
 710                 if (flags & RF_CARD_DISABLED)
 711                         iwl_tt_enter_ct_kill(priv);
 712         }
 713         if (!(flags & RF_CARD_DISABLED))
 714                 iwl_tt_exit_ct_kill(priv);
 715
 716         if (flags & HW_CARD_DISABLED)
 717                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 718         else
 719                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 720
 721
 722         if (!(flags & RXON_CARD_DISABLED))
 723                 iwl_scan_cancel(priv);
 724
 725         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 726              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 727                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 728                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 729         else
 730                 wake_up_interruptible(&priv->wait_command_queue);
 731 }
 732
 733 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 734 {
 735         if (src == IWL_PWR_SRC_VAUX) {
 736                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 737                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 738                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 739                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 740         } else {
 741                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 742                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 743                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 744         }
 745
 746         return 0;
 747 }
 748
 749 /**
 750  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 751  *
 752  * Setup the RX handlers for each of the reply types sent from the uCode
 753  * to the host.
 754  *
 755  * This function chains into the hardware specific files for them to setup
 756  * any hardware specific handlers as well.
 757  */
 758 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 759 {
 760         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 761         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 762         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 763         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 764         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 765             iwl_rx_pm_debug_statistics_notif;
 766         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 767
 768         /*
 769          * The same handler is used for both the REPLY to a discrete
 770          * statistics request from the host as well as for the periodic
 771          * statistics notifications (after received beacons) from the uCode.
 772          */
 773         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
 774         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 775
 776         iwl_setup_spectrum_handlers(priv);
 777         iwl_setup_rx_scan_handlers(priv);
 778
 779         /* status change handler */
 780         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 781
 782         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 783             iwl_rx_missed_beacon_notif;
 784         /* Rx handlers */
 785         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 786         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 787         /* block ack */
 788         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 789         /* Set up hardware specific Rx handlers */
 790         priv->cfg->ops->lib->rx_handler_setup(priv);
 791 }
 792
 793 /**
 794  * iwl_rx_handle - Main entry function for receiving responses from uCode
 795  *
 796  * Uses the priv->rx_handlers callback function array to invoke
 797  * the appropriate handlers, including command responses,
 798  * frame-received notifications, and other notifications.
 799  */
 800 void iwl_rx_handle(struct iwl_priv *priv)
 801 {
 802         struct iwl_rx_mem_buffer *rxb;
 803         struct iwl_rx_packet *pkt;
 804         struct iwl_rx_queue *rxq = &priv->rxq;
 805         u32 r, i;
 806         int reclaim;
 807         unsigned long flags;
 808         u8 fill_rx = 0;
 809         u32 count = 8;
 810         int total_empty;
 811
 812         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 813          * buffer that the driver may process (last buffer filled by ucode). */
 814         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 815         i = rxq->read;
 816
 817         /* Rx interrupt, but nothing sent from uCode */
 818         if (i == r)
 819                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 820
 821         /* calculate total frames need to be restock after handling RX */
 822         total_empty = r - rxq->write_actual;
 823         if (total_empty < 0)
 824                 total_empty += RX_QUEUE_SIZE;
 825
 826         if (total_empty > (RX_QUEUE_SIZE / 2))
 827                 fill_rx = 1;
 828
 829         while (i != r) {
 830                 rxb = rxq->queue[i];
 831
 832                 /* If an RXB doesn't have a Rx queue slot associated with it,
 833                  * then a bug has been introduced in the queue refilling
 834                  * routines -- catch it here */
 835                 BUG_ON(rxb == NULL);
 836
 837                 rxq->queue[i] = NULL;
 838
 839                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
 840                                PAGE_SIZE << priv->hw_params.rx_page_order,
 841                                PCI_DMA_FROMDEVICE);
 842                 pkt = rxb_addr(rxb);
 843
 844                 trace_iwlwifi_dev_rx(priv, pkt,
 845                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
 846
 847                 /* Reclaim a command buffer only if this packet is a response
 848                  *   to a (driver-originated) command.
 849                  * If the packet (e.g. Rx frame) originated from uCode,
 850                  *   there is no command buffer to reclaim.
 851                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 852                  *   but apparently a few don't get set; catch them here. */
 853                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 854                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 855                         (pkt->hdr.cmd != REPLY_RX) &&
 856                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 857                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 858                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 859                         (pkt->hdr.cmd != REPLY_TX);
 860
 861                 /* Based on type of command response or notification,
 862                  *   handle those that need handling via function in
 863                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 864                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 865                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 866                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 867                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 868                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 869                 } else {
 870                         /* No handling needed */
 871                         IWL_DEBUG_RX(priv,
 872                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 873                                 r, i, get_cmd_string(pkt->hdr.cmd),
 874                                 pkt->hdr.cmd);
 875                 }
 876
 877                 /*
 878                  * XXX: After here, we should always check rxb->page
 879                  * against NULL before touching it or its virtual
 880                  * memory (pkt). Because some rx_handler might have
 881                  * already taken or freed the pages.
 882                  */
 883
 884                 if (reclaim) {
 885                         /* Invoke any callbacks, transfer the buffer to caller,
 886                          * and fire off the (possibly) blocking iwl_send_cmd()
 887                          * as we reclaim the driver command queue */
 888                         if (rxb->page)
 889                                 iwl_tx_cmd_complete(priv, rxb);
 890                         else
 891                                 IWL_WARN(priv, "Claim null rxb?\n");
 892                 }
 893
 894                 /* Reuse the page if possible. For notification packets and
 895                  * SKBs that fail to Rx correctly, add them back into the
 896                  * rx_free list for reuse later. */
 897                 spin_lock_irqsave(&rxq->lock, flags);
 898                 if (rxb->page != NULL) {
 899                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
 900                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
 901                                 PCI_DMA_FROMDEVICE);
 902                         list_add_tail(&rxb->list, &rxq->rx_free);
 903                         rxq->free_count++;
 904                 } else
 905                         list_add_tail(&rxb->list, &rxq->rx_used);
 906
 907                 spin_unlock_irqrestore(&rxq->lock, flags);
 908
 909                 i = (i + 1) & RX_QUEUE_MASK;
 910                 /* If there are a lot of unused frames,
 911                  * restock the Rx queue so ucode wont assert. */
 912                 if (fill_rx) {
 913                         count++;
 914                         if (count >= 8) {
 915                                 rxq->read = i;
 916                                 iwl_rx_replenish_now(priv);
 917                                 count = 0;
 918                         }
 919                 }
 920         }
 921
 922         /* Backtrack one entry */
 923         rxq->read = i;
 924         if (fill_rx)
 925                 iwl_rx_replenish_now(priv);
 926         else
 927                 iwl_rx_queue_restock(priv);
 928 }
 929
 930 /* call this function to flush any scheduled tasklet */
 931 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 932 {
 933         /* wait to make sure we flush pending tasklet*/
 934         synchronize_irq(priv->pci_dev->irq);
 935         tasklet_kill(&priv->irq_tasklet);
 936 }
 937
 938 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
 939 {
 940         u32 inta, handled = 0;
 941         u32 inta_fh;
 942         unsigned long flags;
 943         u32 i;
 944 #ifdef CONFIG_IWLWIFI_DEBUG
 945         u32 inta_mask;
 946 #endif
 947
 948         spin_lock_irqsave(&priv->lock, flags);
 949
 950         /* Ack/clear/reset pending uCode interrupts.
 951          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 952          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
 953         inta = iwl_read32(priv, CSR_INT);
 954         iwl_write32(priv, CSR_INT, inta);
 955
 956         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
 957          * Any new interrupts that happen after this, either while we're
 958          * in this tasklet, or later, will show up in next ISR/tasklet. */
 959         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
 960         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
 961
 962 #ifdef CONFIG_IWLWIFI_DEBUG
 963         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
 964                 /* just for debug */
 965                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 966                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
 967                               inta, inta_mask, inta_fh);
 968         }
 969 #endif
 970
 971         spin_unlock_irqrestore(&priv->lock, flags);
 972
 973         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
 974          * atomic, make sure that inta covers all the interrupts that
 975          * we've discovered, even if FH interrupt came in just after
 976          * reading CSR_INT. */
 977         if (inta_fh & CSR49_FH_INT_RX_MASK)
 978                 inta |= CSR_INT_BIT_FH_RX;
 979         if (inta_fh & CSR49_FH_INT_TX_MASK)
 980                 inta |= CSR_INT_BIT_FH_TX;
 981
 982         /* Now service all interrupt bits discovered above. */
 983         if (inta & CSR_INT_BIT_HW_ERR) {
 984                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 985
 986                 /* Tell the device to stop sending interrupts */
 987                 iwl_disable_interrupts(priv);
 988
 989                 priv->isr_stats.hw++;
 990                 iwl_irq_handle_error(priv);
 991
 992                 handled |= CSR_INT_BIT_HW_ERR;
 993
 994                 return;
 995         }
 996
 997 #ifdef CONFIG_IWLWIFI_DEBUG
 998         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
 999                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1000                 if (inta & CSR_INT_BIT_SCD) {
1001                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1002                                       "the frame/frames.\n");
1003                         priv->isr_stats.sch++;
1004                 }
1005
1006                 /* Alive notification via Rx interrupt will do the real work */
1007                 if (inta & CSR_INT_BIT_ALIVE) {
1008                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1009                         priv->isr_stats.alive++;
1010                 }
1011         }
1012 #endif
1013         /* Safely ignore these bits for debug checks below */
1014         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1015
1016         /* HW RF KILL switch toggled */
1017         if (inta & CSR_INT_BIT_RF_KILL) {
1018                 int hw_rf_kill = 0;
1019                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1020                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1021                         hw_rf_kill = 1;
1022
1023                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1024                                 hw_rf_kill ? "disable radio" : "enable radio");
1025
1026                 priv->isr_stats.rfkill++;
1027
1028                 /* driver only loads ucode once setting the interface up.
1029                  * the driver allows loading the ucode even if the radio
1030                  * is killed. Hence update the killswitch state here. The
1031                  * rfkill handler will care about restarting if needed.
1032                  */
1033                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1034                         if (hw_rf_kill)
1035                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1036                         else
1037                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1038                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1039                 }
1040
1041                 handled |= CSR_INT_BIT_RF_KILL;
1042         }
1043
1044         /* Chip got too hot and stopped itself */
1045         if (inta & CSR_INT_BIT_CT_KILL) {
1046                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1047                 priv->isr_stats.ctkill++;
1048                 handled |= CSR_INT_BIT_CT_KILL;
1049         }
1050
1051         /* Error detected by uCode */
1052         if (inta & CSR_INT_BIT_SW_ERR) {
1053                 IWL_ERR(priv, "Microcode SW error detected. "
1054                         " Restarting 0x%X.\n", inta);
1055                 priv->isr_stats.sw++;
1056                 priv->isr_stats.sw_err = inta;
1057                 iwl_irq_handle_error(priv);
1058                 handled |= CSR_INT_BIT_SW_ERR;
1059         }
1060
1061         /*
1062          * uCode wakes up after power-down sleep.
1063          * Tell device about any new tx or host commands enqueued,
1064          * and about any Rx buffers made available while asleep.
1065          */
1066         if (inta & CSR_INT_BIT_WAKEUP) {
1067                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1068                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1069                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1070                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1071                 priv->isr_stats.wakeup++;
1072                 handled |= CSR_INT_BIT_WAKEUP;
1073         }
1074
1075         /* All uCode command responses, including Tx command responses,
1076          * Rx "responses" (frame-received notification), and other
1077          * notifications from uCode come through here*/
1078         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1079                 iwl_rx_handle(priv);
1080                 priv->isr_stats.rx++;
1081                 iwl_leds_background(priv);
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                  * this could lead to RX race, RX periodic will solve this race
1271                  */
1272                 iwl_write32(priv, CSR_INT_PERIODIC_REG,
1273                             CSR_INT_PERIODIC_DIS);
1274                 iwl_rx_handle(priv);
1275                 /* Only set RX periodic if real RX is received. */
1276                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1277                         iwl_write32(priv, CSR_INT_PERIODIC_REG,
1278                                     CSR_INT_PERIODIC_ENA);
1279
1280                 priv->isr_stats.rx++;
1281                 iwl_leds_background(priv);
1282         }
1283
1284         /* This "Tx" DMA channel is used only for loading uCode */
1285         if (inta & CSR_INT_BIT_FH_TX) {
1286                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1287                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1288                 priv->isr_stats.tx++;
1289                 handled |= CSR_INT_BIT_FH_TX;
1290                 /* Wake up uCode load routine, now that load is complete */
1291                 priv->ucode_write_complete = 1;
1292                 wake_up_interruptible(&priv->wait_command_queue);
1293         }
1294
1295         if (inta & ~handled) {
1296                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1297                 priv->isr_stats.unhandled++;
1298         }
1299
1300         if (inta & ~(priv->inta_mask)) {
1301                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1302                          inta & ~priv->inta_mask);
1303         }
1304
1305         /* Re-enable all interrupts */
1306         /* only Re-enable if diabled by irq */
1307         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1308                 iwl_enable_interrupts(priv);
1309 }
1310
1311
1312 /******************************************************************************
1313  *
1314  * uCode download functions
1315  *
1316  ******************************************************************************/
1317
1318 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1319 {
1320         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1321         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1322         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1323         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1324         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1325         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1326 }
1327
1328 static void iwl_nic_start(struct iwl_priv *priv)
1329 {
1330         /* Remove all resets to allow NIC to operate */
1331         iwl_write32(priv, CSR_RESET, 0);
1332 }
1333
1334
1335 /**
1336  * iwl_read_ucode - Read uCode images from disk file.
1337  *
1338  * Copy into buffers for card to fetch via bus-mastering
1339  */
1340 static int iwl_read_ucode(struct iwl_priv *priv)
1341 {
1342         struct iwl_ucode_header *ucode;
1343         int ret = -EINVAL, index;
1344         const struct firmware *ucode_raw;
1345         const char *name_pre = priv->cfg->fw_name_pre;
1346         const unsigned int api_max = priv->cfg->ucode_api_max;
1347         const unsigned int api_min = priv->cfg->ucode_api_min;
1348         char buf[25];
1349         u8 *src;
1350         size_t len;
1351         u32 api_ver, build;
1352         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1353         u16 eeprom_ver;
1354
1355         /* Ask kernel firmware_class module to get the boot firmware off disk.
1356          * request_firmware() is synchronous, file is in memory on return. */
1357         for (index = api_max; index >= api_min; index--) {
1358                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1359                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1360                 if (ret < 0) {
1361                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1362                                   buf, ret);
1363                         if (ret == -ENOENT)
1364                                 continue;
1365                         else
1366                                 goto error;
1367                 } else {
1368                         if (index < api_max)
1369                                 IWL_ERR(priv, "Loaded firmware %s, "
1370                                         "which is deprecated. "
1371                                         "Please use API v%u instead.\n",
1372                                           buf, api_max);
1373
1374                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1375                                        buf, ucode_raw->size);
1376                         break;
1377                 }
1378         }
1379
1380         if (ret < 0)
1381                 goto error;
1382
1383         /* Make sure that we got at least the v1 header! */
1384         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1385                 IWL_ERR(priv, "File size way too small!\n");
1386                 ret = -EINVAL;
1387                 goto err_release;
1388         }
1389
1390         /* Data from ucode file:  header followed by uCode images */
1391         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1392
1393         priv->ucode_ver = le32_to_cpu(ucode->ver);
1394         api_ver = IWL_UCODE_API(priv->ucode_ver);
1395         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1396         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1397         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1398         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1399         init_data_size =
1400                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1401         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1402         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1403
1404         /* api_ver should match the api version forming part of the
1405          * firmware filename ... but we don't check for that and only rely
1406          * on the API version read from firmware header from here on forward */
1407
1408         if (api_ver < api_min || api_ver > api_max) {
1409                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1410                           "Driver supports v%u, firmware is v%u.\n",
1411                           api_max, api_ver);
1412                 priv->ucode_ver = 0;
1413                 ret = -EINVAL;
1414                 goto err_release;
1415         }
1416         if (api_ver != api_max)
1417                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1418                           "got v%u. New firmware can be obtained "
1419                           "from http://www.intellinuxwireless.org.\n",
1420                           api_max, api_ver);
1421
1422         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1423                IWL_UCODE_MAJOR(priv->ucode_ver),
1424                IWL_UCODE_MINOR(priv->ucode_ver),
1425                IWL_UCODE_API(priv->ucode_ver),
1426                IWL_UCODE_SERIAL(priv->ucode_ver));
1427
1428         snprintf(priv->hw->wiphy->fw_version,
1429                  sizeof(priv->hw->wiphy->fw_version),
1430                  "%u.%u.%u.%u",
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         if (build)
1437                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1438
1439         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1440         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1441                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1442                        ? "OTP" : "EEPROM", eeprom_ver);
1443
1444         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1445                        priv->ucode_ver);
1446         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1447                        inst_size);
1448         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1449                        data_size);
1450         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1451                        init_size);
1452         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1453                        init_data_size);
1454         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1455                        boot_size);
1456
1457         /* Verify size of file vs. image size info in file's header */
1458         if (ucode_raw->size !=
1459                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1460                 inst_size + data_size + init_size +
1461                 init_data_size + boot_size) {
1462
1463                 IWL_DEBUG_INFO(priv,
1464                         "uCode file size %d does not match expected size\n",
1465                         (int)ucode_raw->size);
1466                 ret = -EINVAL;
1467                 goto err_release;
1468         }
1469
1470         /* Verify that uCode images will fit in card's SRAM */
1471         if (inst_size > priv->hw_params.max_inst_size) {
1472                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1473                                inst_size);
1474                 ret = -EINVAL;
1475                 goto err_release;
1476         }
1477
1478         if (data_size > priv->hw_params.max_data_size) {
1479                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1480                                 data_size);
1481                 ret = -EINVAL;
1482                 goto err_release;
1483         }
1484         if (init_size > priv->hw_params.max_inst_size) {
1485                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1486                         init_size);
1487                 ret = -EINVAL;
1488                 goto err_release;
1489         }
1490         if (init_data_size > priv->hw_params.max_data_size) {
1491                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1492                       init_data_size);
1493                 ret = -EINVAL;
1494                 goto err_release;
1495         }
1496         if (boot_size > priv->hw_params.max_bsm_size) {
1497                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1498                         boot_size);
1499                 ret = -EINVAL;
1500                 goto err_release;
1501         }
1502
1503         /* Allocate ucode buffers for card's bus-master loading ... */
1504
1505         /* Runtime instructions and 2 copies of data:
1506          * 1) unmodified from disk
1507          * 2) backup cache for save/restore during power-downs */
1508         priv->ucode_code.len = inst_size;
1509         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1510
1511         priv->ucode_data.len = data_size;
1512         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1513
1514         priv->ucode_data_backup.len = data_size;
1515         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1516
1517         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1518             !priv->ucode_data_backup.v_addr)
1519                 goto err_pci_alloc;
1520
1521         /* Initialization instructions and data */
1522         if (init_size && init_data_size) {
1523                 priv->ucode_init.len = init_size;
1524                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1525
1526                 priv->ucode_init_data.len = init_data_size;
1527                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1528
1529                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1530                         goto err_pci_alloc;
1531         }
1532
1533         /* Bootstrap (instructions only, no data) */
1534         if (boot_size) {
1535                 priv->ucode_boot.len = boot_size;
1536                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1537
1538                 if (!priv->ucode_boot.v_addr)
1539                         goto err_pci_alloc;
1540         }
1541
1542         /* Copy images into buffers for card's bus-master reads ... */
1543
1544         /* Runtime instructions (first block of data in file) */
1545         len = inst_size;
1546         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1547         memcpy(priv->ucode_code.v_addr, src, len);
1548         src += len;
1549
1550         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1551                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1552
1553         /* Runtime data (2nd block)
1554          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1555         len = data_size;
1556         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1557         memcpy(priv->ucode_data.v_addr, src, len);
1558         memcpy(priv->ucode_data_backup.v_addr, src, len);
1559         src += len;
1560
1561         /* Initialization instructions (3rd block) */
1562         if (init_size) {
1563                 len = init_size;
1564                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1565                                 len);
1566                 memcpy(priv->ucode_init.v_addr, src, len);
1567                 src += len;
1568         }
1569
1570         /* Initialization data (4th block) */
1571         if (init_data_size) {
1572                 len = init_data_size;
1573                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1574                                len);
1575                 memcpy(priv->ucode_init_data.v_addr, src, len);
1576                 src += len;
1577         }
1578
1579         /* Bootstrap instructions (5th block) */
1580         len = boot_size;
1581         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1582         memcpy(priv->ucode_boot.v_addr, src, len);
1583
1584         /* We have our copies now, allow OS release its copies */
1585         release_firmware(ucode_raw);
1586         return 0;
1587
1588  err_pci_alloc:
1589         IWL_ERR(priv, "failed to allocate pci memory\n");
1590         ret = -ENOMEM;
1591         iwl_dealloc_ucode_pci(priv);
1592
1593  err_release:
1594         release_firmware(ucode_raw);
1595
1596  error:
1597         return ret;
1598 }
1599
1600 #ifdef CONFIG_IWLWIFI_DEBUG
1601 static const char *desc_lookup_text[] = {
1602         "OK",
1603         "FAIL",
1604         "BAD_PARAM",
1605         "BAD_CHECKSUM",
1606         "NMI_INTERRUPT_WDG",
1607         "SYSASSERT",
1608         "FATAL_ERROR",
1609         "BAD_COMMAND",
1610         "HW_ERROR_TUNE_LOCK",
1611         "HW_ERROR_TEMPERATURE",
1612         "ILLEGAL_CHAN_FREQ",
1613         "VCC_NOT_STABLE",
1614         "FH_ERROR",
1615         "NMI_INTERRUPT_HOST",
1616         "NMI_INTERRUPT_ACTION_PT",
1617         "NMI_INTERRUPT_UNKNOWN",
1618         "UCODE_VERSION_MISMATCH",
1619         "HW_ERROR_ABS_LOCK",
1620         "HW_ERROR_CAL_LOCK_FAIL",
1621         "NMI_INTERRUPT_INST_ACTION_PT",
1622         "NMI_INTERRUPT_DATA_ACTION_PT",
1623         "NMI_TRM_HW_ER",
1624         "NMI_INTERRUPT_TRM",
1625         "NMI_INTERRUPT_BREAK_POINT"
1626         "DEBUG_0",
1627         "DEBUG_1",
1628         "DEBUG_2",
1629         "DEBUG_3",
1630         "UNKNOWN"
1631 };
1632
1633 static const char *desc_lookup(int i)
1634 {
1635         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1636
1637         if (i < 0 || i > max)
1638                 i = max;
1639
1640         return desc_lookup_text[i];
1641 }
1642
1643 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1644 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1645
1646 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1647 {
1648         u32 data2, line;
1649         u32 desc, time, count, base, data1;
1650         u32 blink1, blink2, ilink1, ilink2;
1651
1652         if (priv->ucode_type == UCODE_INIT)
1653                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1654         else
1655                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1656
1657         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1658                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1659                 return;
1660         }
1661
1662         count = iwl_read_targ_mem(priv, base);
1663
1664         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1665                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1666                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1667                         priv->status, count);
1668         }
1669
1670         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1671         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1672         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1673         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1674         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1675         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1676         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1677         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1678         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1679
1680         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1681                                       blink1, blink2, ilink1, ilink2);
1682
1683         IWL_ERR(priv, "Desc                               Time       "
1684                 "data1      data2      line\n");
1685         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1686                 desc_lookup(desc), desc, time, data1, data2, line);
1687         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1688         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1689                 ilink1, ilink2);
1690
1691 }
1692
1693 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1694
1695 /**
1696  * iwl_print_event_log - Dump error event log to syslog
1697  *
1698  */
1699 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1700                                 u32 num_events, u32 mode)
1701 {
1702         u32 i;
1703         u32 base;       /* SRAM byte address of event log header */
1704         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1705         u32 ptr;        /* SRAM byte address of log data */
1706         u32 ev, time, data; /* event log data */
1707         unsigned long reg_flags;
1708
1709         if (num_events == 0)
1710                 return;
1711         if (priv->ucode_type == UCODE_INIT)
1712                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1713         else
1714                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1715
1716         if (mode == 0)
1717                 event_size = 2 * sizeof(u32);
1718         else
1719                 event_size = 3 * sizeof(u32);
1720
1721         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1722
1723         /* Make sure device is powered up for SRAM reads */
1724         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1725         iwl_grab_nic_access(priv);
1726
1727         /* Set starting address; reads will auto-increment */
1728         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1729         rmb();
1730
1731         /* "time" is actually "data" for mode 0 (no timestamp).
1732         * place event id # at far right for easier visual parsing. */
1733         for (i = 0; i < num_events; i++) {
1734                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1735                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1736                 if (mode == 0) {
1737                         /* data, ev */
1738                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1739                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1740                 } else {
1741                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1742                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1743                                         time, data, ev);
1744                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1745                 }
1746         }
1747
1748         /* Allow device to power down */
1749         iwl_release_nic_access(priv);
1750         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1751 }
1752
1753 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1754 #define MAX_EVENT_LOG_SIZE (512)
1755
1756 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1757 {
1758         u32 base;       /* SRAM byte address of event log header */
1759         u32 capacity;   /* event log capacity in # entries */
1760         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1761         u32 num_wraps;  /* # times uCode wrapped to top of log */
1762         u32 next_entry; /* index of next entry to be written by uCode */
1763         u32 size;       /* # entries that we'll print */
1764
1765         if (priv->ucode_type == UCODE_INIT)
1766                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1767         else
1768                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1769
1770         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1771                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1772                 return;
1773         }
1774
1775         /* event log header */
1776         capacity = iwl_read_targ_mem(priv, base);
1777         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1778         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1779         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1780
1781         if (capacity > MAX_EVENT_LOG_SIZE) {
1782                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1783                         capacity, MAX_EVENT_LOG_SIZE);
1784                 capacity = MAX_EVENT_LOG_SIZE;
1785         }
1786
1787         if (next_entry > MAX_EVENT_LOG_SIZE) {
1788                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1789                         next_entry, MAX_EVENT_LOG_SIZE);
1790                 next_entry = MAX_EVENT_LOG_SIZE;
1791         }
1792
1793         size = num_wraps ? capacity : next_entry;
1794
1795         /* bail out if nothing in log */
1796         if (size == 0) {
1797                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1798                 return;
1799         }
1800
1801         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1802                         size, num_wraps);
1803
1804         /* if uCode has wrapped back to top of log, start at the oldest entry,
1805          * i.e the next one that uCode would fill. */
1806         if (num_wraps)
1807                 iwl_print_event_log(priv, next_entry,
1808                                         capacity - next_entry, mode);
1809         /* (then/else) start at top of log */
1810         iwl_print_event_log(priv, 0, next_entry, mode);
1811
1812 }
1813 #endif
1814
1815 /**
1816  * iwl_alive_start - called after REPLY_ALIVE notification received
1817  *                   from protocol/runtime uCode (initialization uCode's
1818  *                   Alive gets handled by iwl_init_alive_start()).
1819  */
1820 static void iwl_alive_start(struct iwl_priv *priv)
1821 {
1822         int ret = 0;
1823
1824         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1825
1826         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1827                 /* We had an error bringing up the hardware, so take it
1828                  * all the way back down so we can try again */
1829                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1830                 goto restart;
1831         }
1832
1833         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1834          * This is a paranoid check, because we would not have gotten the
1835          * "runtime" alive if code weren't properly loaded.  */
1836         if (iwl_verify_ucode(priv)) {
1837                 /* Runtime instruction load was bad;
1838                  * take it all the way back down so we can try again */
1839                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1840                 goto restart;
1841         }
1842
1843         iwl_clear_stations_table(priv);
1844         ret = priv->cfg->ops->lib->alive_notify(priv);
1845         if (ret) {
1846                 IWL_WARN(priv,
1847                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1848                 goto restart;
1849         }
1850
1851         /* After the ALIVE response, we can send host commands to the uCode */
1852         set_bit(STATUS_ALIVE, &priv->status);
1853
1854         if (iwl_is_rfkill(priv))
1855                 return;
1856
1857         ieee80211_wake_queues(priv->hw);
1858
1859         priv->active_rate = priv->rates_mask;
1860         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1861
1862         /* Configure Tx antenna selection based on H/W config */
1863         if (priv->cfg->ops->hcmd->set_tx_ant)
1864                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
1865
1866         if (iwl_is_associated(priv)) {
1867                 struct iwl_rxon_cmd *active_rxon =
1868                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1869                 /* apply any changes in staging */
1870                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1871                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1872         } else {
1873                 /* Initialize our rx_config data */
1874                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1875
1876                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1877                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1878
1879                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1880         }
1881
1882         /* Configure Bluetooth device coexistence support */
1883         iwl_send_bt_config(priv);
1884
1885         iwl_reset_run_time_calib(priv);
1886
1887         /* Configure the adapter for unassociated operation */
1888         iwlcore_commit_rxon(priv);
1889
1890         /* At this point, the NIC is initialized and operational */
1891         iwl_rf_kill_ct_config(priv);
1892
1893         iwl_leds_init(priv);
1894
1895         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1896         set_bit(STATUS_READY, &priv->status);
1897         wake_up_interruptible(&priv->wait_command_queue);
1898
1899         iwl_power_update_mode(priv, true);
1900
1901         /* reassociate for ADHOC mode */
1902         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1903                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1904                                                                 priv->vif);
1905                 if (beacon)
1906                         iwl_mac_beacon_update(priv->hw, beacon);
1907         }
1908
1909
1910         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1911                 iwl_set_mode(priv, priv->iw_mode);
1912
1913         return;
1914
1915  restart:
1916         queue_work(priv->workqueue, &priv->restart);
1917 }
1918
1919 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1920
1921 static void __iwl_down(struct iwl_priv *priv)
1922 {
1923         unsigned long flags;
1924         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1925
1926         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1927
1928         if (!exit_pending)
1929                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1930
1931         iwl_clear_stations_table(priv);
1932
1933         /* Unblock any waiting calls */
1934         wake_up_interruptible_all(&priv->wait_command_queue);
1935
1936         /* Wipe out the EXIT_PENDING status bit if we are not actually
1937          * exiting the module */
1938         if (!exit_pending)
1939                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1940
1941         /* stop and reset the on-board processor */
1942         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1943
1944         /* tell the device to stop sending interrupts */
1945         spin_lock_irqsave(&priv->lock, flags);
1946         iwl_disable_interrupts(priv);
1947         spin_unlock_irqrestore(&priv->lock, flags);
1948         iwl_synchronize_irq(priv);
1949
1950         if (priv->mac80211_registered)
1951                 ieee80211_stop_queues(priv->hw);
1952
1953         /* If we have not previously called iwl_init() then
1954          * clear all bits but the RF Kill bit and return */
1955         if (!iwl_is_init(priv)) {
1956                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1957                                         STATUS_RF_KILL_HW |
1958                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1959                                         STATUS_GEO_CONFIGURED |
1960                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1961                                         STATUS_EXIT_PENDING;
1962                 goto exit;
1963         }
1964
1965         /* ...otherwise clear out all the status bits but the RF Kill
1966          * bit and continue taking the NIC down. */
1967         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1968                                 STATUS_RF_KILL_HW |
1969                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1970                                 STATUS_GEO_CONFIGURED |
1971                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1972                                 STATUS_FW_ERROR |
1973                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1974                                 STATUS_EXIT_PENDING;
1975
1976         /* device going down, Stop using ICT table */
1977         iwl_disable_ict(priv);
1978
1979         iwl_txq_ctx_stop(priv);
1980         iwl_rxq_stop(priv);
1981
1982         /* Power-down device's busmaster DMA clocks */
1983         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1984         udelay(5);
1985
1986         /* Make sure (redundant) we've released our request to stay awake */
1987         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1988
1989         /* Stop the device, and put it in low power state */
1990         priv->cfg->ops->lib->apm_ops.stop(priv);
1991
1992  exit:
1993         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1994
1995         if (priv->ibss_beacon)
1996                 dev_kfree_skb(priv->ibss_beacon);
1997         priv->ibss_beacon = NULL;
1998
1999         /* clear out any free frames */
2000         iwl_clear_free_frames(priv);
2001 }
2002
2003 static void iwl_down(struct iwl_priv *priv)
2004 {
2005         mutex_lock(&priv->mutex);
2006         __iwl_down(priv);
2007         mutex_unlock(&priv->mutex);
2008
2009         iwl_cancel_deferred_work(priv);
2010 }
2011
2012 #define HW_READY_TIMEOUT (50)
2013
2014 static int iwl_set_hw_ready(struct iwl_priv *priv)
2015 {
2016         int ret = 0;
2017
2018         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2019                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2020
2021         /* See if we got it */
2022         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2023                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2024                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2025                                 HW_READY_TIMEOUT);
2026         if (ret != -ETIMEDOUT)
2027                 priv->hw_ready = true;
2028         else
2029                 priv->hw_ready = false;
2030
2031         IWL_DEBUG_INFO(priv, "hardware %s\n",
2032                       (priv->hw_ready == 1) ? "ready" : "not ready");
2033         return ret;
2034 }
2035
2036 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2037 {
2038         int ret = 0;
2039
2040         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2041
2042         ret = iwl_set_hw_ready(priv);
2043         if (priv->hw_ready)
2044                 return ret;
2045
2046         /* If HW is not ready, prepare the conditions to check again */
2047         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2048                         CSR_HW_IF_CONFIG_REG_PREPARE);
2049
2050         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2051                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2052                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2053
2054         /* HW should be ready by now, check again. */
2055         if (ret != -ETIMEDOUT)
2056                 iwl_set_hw_ready(priv);
2057
2058         return ret;
2059 }
2060
2061 #define MAX_HW_RESTARTS 5
2062
2063 static int __iwl_up(struct iwl_priv *priv)
2064 {
2065         int i;
2066         int ret;
2067
2068         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2069                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2070                 return -EIO;
2071         }
2072
2073         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2074                 IWL_ERR(priv, "ucode not available for device bringup\n");
2075                 return -EIO;
2076         }
2077
2078         iwl_prepare_card_hw(priv);
2079
2080         if (!priv->hw_ready) {
2081                 IWL_WARN(priv, "Exit HW not ready\n");
2082                 return -EIO;
2083         }
2084
2085         /* If platform's RF_KILL switch is NOT set to KILL */
2086         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2087                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2088         else
2089                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2090
2091         if (iwl_is_rfkill(priv)) {
2092                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2093
2094                 iwl_enable_interrupts(priv);
2095                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2096                 return 0;
2097         }
2098
2099         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2100
2101         ret = iwl_hw_nic_init(priv);
2102         if (ret) {
2103                 IWL_ERR(priv, "Unable to init nic\n");
2104                 return ret;
2105         }
2106
2107         /* make sure rfkill handshake bits are cleared */
2108         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2109         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2110                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2111
2112         /* clear (again), then enable host interrupts */
2113         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2114         iwl_enable_interrupts(priv);
2115
2116         /* really make sure rfkill handshake bits are cleared */
2117         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2118         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2119
2120         /* Copy original ucode data image from disk into backup cache.
2121          * This will be used to initialize the on-board processor's
2122          * data SRAM for a clean start when the runtime program first loads. */
2123         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2124                priv->ucode_data.len);
2125
2126         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2127
2128                 iwl_clear_stations_table(priv);
2129
2130                 /* load bootstrap state machine,
2131                  * load bootstrap program into processor's memory,
2132                  * prepare to load the "initialize" uCode */
2133                 ret = priv->cfg->ops->lib->load_ucode(priv);
2134
2135                 if (ret) {
2136                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2137                                 ret);
2138                         continue;
2139                 }
2140
2141                 /* start card; "initialize" will load runtime ucode */
2142                 iwl_nic_start(priv);
2143
2144                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2145
2146                 return 0;
2147         }
2148
2149         set_bit(STATUS_EXIT_PENDING, &priv->status);
2150         __iwl_down(priv);
2151         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2152
2153         /* tried to restart and config the device for as long as our
2154          * patience could withstand */
2155         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2156         return -EIO;
2157 }
2158
2159
2160 /*****************************************************************************
2161  *
2162  * Workqueue callbacks
2163  *
2164  *****************************************************************************/
2165
2166 static void iwl_bg_init_alive_start(struct work_struct *data)
2167 {
2168         struct iwl_priv *priv =
2169             container_of(data, struct iwl_priv, init_alive_start.work);
2170
2171         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2172                 return;
2173
2174         mutex_lock(&priv->mutex);
2175         priv->cfg->ops->lib->init_alive_start(priv);
2176         mutex_unlock(&priv->mutex);
2177 }
2178
2179 static void iwl_bg_alive_start(struct work_struct *data)
2180 {
2181         struct iwl_priv *priv =
2182             container_of(data, struct iwl_priv, alive_start.work);
2183
2184         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2185                 return;
2186
2187         /* enable dram interrupt */
2188         iwl_reset_ict(priv);
2189
2190         mutex_lock(&priv->mutex);
2191         iwl_alive_start(priv);
2192         mutex_unlock(&priv->mutex);
2193 }
2194
2195 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2196 {
2197         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2198                         run_time_calib_work);
2199
2200         mutex_lock(&priv->mutex);
2201
2202         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2203             test_bit(STATUS_SCANNING, &priv->status)) {
2204                 mutex_unlock(&priv->mutex);
2205                 return;
2206         }
2207
2208         if (priv->start_calib) {
2209                 iwl_chain_noise_calibration(priv, &priv->statistics);
2210
2211                 iwl_sensitivity_calibration(priv, &priv->statistics);
2212         }
2213
2214         mutex_unlock(&priv->mutex);
2215         return;
2216 }
2217
2218 static void iwl_bg_up(struct work_struct *data)
2219 {
2220         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2221
2222         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2223                 return;
2224
2225         mutex_lock(&priv->mutex);
2226         __iwl_up(priv);
2227         mutex_unlock(&priv->mutex);
2228 }
2229
2230 static void iwl_bg_restart(struct work_struct *data)
2231 {
2232         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2233
2234         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2235                 return;
2236
2237         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2238                 mutex_lock(&priv->mutex);
2239                 priv->vif = NULL;
2240                 priv->is_open = 0;
2241                 mutex_unlock(&priv->mutex);
2242                 iwl_down(priv);
2243                 ieee80211_restart_hw(priv->hw);
2244         } else {
2245                 iwl_down(priv);
2246                 queue_work(priv->workqueue, &priv->up);
2247         }
2248 }
2249
2250 static void iwl_bg_rx_replenish(struct work_struct *data)
2251 {
2252         struct iwl_priv *priv =
2253             container_of(data, struct iwl_priv, rx_replenish);
2254
2255         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2256                 return;
2257
2258         mutex_lock(&priv->mutex);
2259         iwl_rx_replenish(priv);
2260         mutex_unlock(&priv->mutex);
2261 }
2262
2263 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2264
2265 void iwl_post_associate(struct iwl_priv *priv)
2266 {
2267         struct ieee80211_conf *conf = NULL;
2268         int ret = 0;
2269         unsigned long flags;
2270
2271         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2272                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2273                 return;
2274         }
2275
2276         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2277                         priv->assoc_id, priv->active_rxon.bssid_addr);
2278
2279
2280         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2281                 return;
2282
2283
2284         if (!priv->vif || !priv->is_open)
2285                 return;
2286
2287         iwl_scan_cancel_timeout(priv, 200);
2288
2289         conf = ieee80211_get_hw_conf(priv->hw);
2290
2291         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2292         iwlcore_commit_rxon(priv);
2293
2294         iwl_setup_rxon_timing(priv);
2295         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2296                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2297         if (ret)
2298                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2299                             "Attempting to continue.\n");
2300
2301         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2302
2303         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2304
2305         if (priv->cfg->ops->hcmd->set_rxon_chain)
2306                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2307
2308         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2309
2310         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2311                         priv->assoc_id, priv->beacon_int);
2312
2313         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2314                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2315         else
2316                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2317
2318         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2319                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2320                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2321                 else
2322                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2323
2324                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2325                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2326
2327         }
2328
2329         iwlcore_commit_rxon(priv);
2330
2331         switch (priv->iw_mode) {
2332         case NL80211_IFTYPE_STATION:
2333                 break;
2334
2335         case NL80211_IFTYPE_ADHOC:
2336
2337                 /* assume default assoc id */
2338                 priv->assoc_id = 1;
2339
2340                 iwl_rxon_add_station(priv, priv->bssid, 0);
2341                 iwl_send_beacon_cmd(priv);
2342
2343                 break;
2344
2345         default:
2346                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2347                           __func__, priv->iw_mode);
2348                 break;
2349         }
2350
2351         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2352                 priv->assoc_station_added = 1;
2353
2354         spin_lock_irqsave(&priv->lock, flags);
2355         iwl_activate_qos(priv, 0);
2356         spin_unlock_irqrestore(&priv->lock, flags);
2357
2358         /* the chain noise calibration will enabled PM upon completion
2359          * If chain noise has already been run, then we need to enable
2360          * power management here */
2361         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2362                 iwl_power_update_mode(priv, false);
2363
2364         /* Enable Rx differential gain and sensitivity calibrations */
2365         iwl_chain_noise_reset(priv);
2366         priv->start_calib = 1;
2367
2368 }
2369
2370 /*****************************************************************************
2371  *
2372  * mac80211 entry point functions
2373  *
2374  *****************************************************************************/
2375
2376 #define UCODE_READY_TIMEOUT     (4 * HZ)
2377
2378 /*
2379  * Not a mac80211 entry point function, but it fits in with all the
2380  * other mac80211 functions grouped here.
2381  */
2382 static int iwl_setup_mac(struct iwl_priv *priv)
2383 {
2384         int ret;
2385         struct ieee80211_hw *hw = priv->hw;
2386         hw->rate_control_algorithm = "iwl-agn-rs";
2387
2388         /* Tell mac80211 our characteristics */
2389         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2390                     IEEE80211_HW_NOISE_DBM |
2391                     IEEE80211_HW_AMPDU_AGGREGATION |
2392                     IEEE80211_HW_SPECTRUM_MGMT;
2393
2394         if (!priv->cfg->broken_powersave)
2395                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2396                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2397
2398         hw->sta_data_size = sizeof(struct iwl_station_priv);
2399         hw->wiphy->interface_modes =
2400                 BIT(NL80211_IFTYPE_STATION) |
2401                 BIT(NL80211_IFTYPE_ADHOC);
2402
2403         hw->wiphy->custom_regulatory = true;
2404
2405         /* Firmware does not support this */
2406         hw->wiphy->disable_beacon_hints = true;
2407
2408         /*
2409          * For now, disable PS by default because it affects
2410          * RX performance significantly.
2411          */
2412         hw->wiphy->ps_default = false;
2413
2414         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2415         /* we create the 802.11 header and a zero-length SSID element */
2416         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2417
2418         /* Default value; 4 EDCA QOS priorities */
2419         hw->queues = 4;
2420
2421         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2422
2423         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2424                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2425                         &priv->bands[IEEE80211_BAND_2GHZ];
2426         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2427                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2428                         &priv->bands[IEEE80211_BAND_5GHZ];
2429
2430         ret = ieee80211_register_hw(priv->hw);
2431         if (ret) {
2432                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2433                 return ret;
2434         }
2435         priv->mac80211_registered = 1;
2436
2437         return 0;
2438 }
2439
2440
2441 static int iwl_mac_start(struct ieee80211_hw *hw)
2442 {
2443         struct iwl_priv *priv = hw->priv;
2444         int ret;
2445
2446         IWL_DEBUG_MAC80211(priv, "enter\n");
2447
2448         /* we should be verifying the device is ready to be opened */
2449         mutex_lock(&priv->mutex);
2450
2451         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2452          * ucode filename and max sizes are card-specific. */
2453
2454         if (!priv->ucode_code.len) {
2455                 ret = iwl_read_ucode(priv);
2456                 if (ret) {
2457                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2458                         mutex_unlock(&priv->mutex);
2459                         return ret;
2460                 }
2461         }
2462
2463         ret = __iwl_up(priv);
2464
2465         mutex_unlock(&priv->mutex);
2466
2467         if (ret)
2468                 return ret;
2469
2470         if (iwl_is_rfkill(priv))
2471                 goto out;
2472
2473         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2474
2475         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2476          * mac80211 will not be run successfully. */
2477         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2478                         test_bit(STATUS_READY, &priv->status),
2479                         UCODE_READY_TIMEOUT);
2480         if (!ret) {
2481                 if (!test_bit(STATUS_READY, &priv->status)) {
2482                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2483                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2484                         return -ETIMEDOUT;
2485                 }
2486         }
2487
2488         iwl_led_start(priv);
2489
2490 out:
2491         priv->is_open = 1;
2492         IWL_DEBUG_MAC80211(priv, "leave\n");
2493         return 0;
2494 }
2495
2496 static void iwl_mac_stop(struct ieee80211_hw *hw)
2497 {
2498         struct iwl_priv *priv = hw->priv;
2499
2500         IWL_DEBUG_MAC80211(priv, "enter\n");
2501
2502         if (!priv->is_open)
2503                 return;
2504
2505         priv->is_open = 0;
2506
2507         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2508                 /* stop mac, cancel any scan request and clear
2509                  * RXON_FILTER_ASSOC_MSK BIT
2510                  */
2511                 mutex_lock(&priv->mutex);
2512                 iwl_scan_cancel_timeout(priv, 100);
2513                 mutex_unlock(&priv->mutex);
2514         }
2515
2516         iwl_down(priv);
2517
2518         flush_workqueue(priv->workqueue);
2519
2520         /* enable interrupts again in order to receive rfkill changes */
2521         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2522         iwl_enable_interrupts(priv);
2523
2524         IWL_DEBUG_MAC80211(priv, "leave\n");
2525 }
2526
2527 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2528 {
2529         struct iwl_priv *priv = hw->priv;
2530
2531         IWL_DEBUG_MACDUMP(priv, "enter\n");
2532
2533         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2534                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2535
2536         if (iwl_tx_skb(priv, skb))
2537                 dev_kfree_skb_any(skb);
2538
2539         IWL_DEBUG_MACDUMP(priv, "leave\n");
2540         return NETDEV_TX_OK;
2541 }
2542
2543 void iwl_config_ap(struct iwl_priv *priv)
2544 {
2545         int ret = 0;
2546         unsigned long flags;
2547
2548         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2549                 return;
2550
2551         /* The following should be done only at AP bring up */
2552         if (!iwl_is_associated(priv)) {
2553
2554                 /* RXON - unassoc (to set timing command) */
2555                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2556                 iwlcore_commit_rxon(priv);
2557
2558                 /* RXON Timing */
2559                 iwl_setup_rxon_timing(priv);
2560                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2561                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2562                 if (ret)
2563                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2564                                         "Attempting to continue.\n");
2565
2566                 /* AP has all antennas */
2567                 priv->chain_noise_data.active_chains =
2568                         priv->hw_params.valid_rx_ant;
2569                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2570                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2571                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2572
2573                 /* FIXME: what should be the assoc_id for AP? */
2574                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2575                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2576                         priv->staging_rxon.flags |=
2577                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2578                 else
2579                         priv->staging_rxon.flags &=
2580                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2581
2582                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2583                         if (priv->assoc_capability &
2584                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2585                                 priv->staging_rxon.flags |=
2586                                         RXON_FLG_SHORT_SLOT_MSK;
2587                         else
2588                                 priv->staging_rxon.flags &=
2589                                         ~RXON_FLG_SHORT_SLOT_MSK;
2590
2591                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2592                                 priv->staging_rxon.flags &=
2593                                         ~RXON_FLG_SHORT_SLOT_MSK;
2594                 }
2595                 /* restore RXON assoc */
2596                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2597                 iwlcore_commit_rxon(priv);
2598                 iwl_reset_qos(priv);
2599                 spin_lock_irqsave(&priv->lock, flags);
2600                 iwl_activate_qos(priv, 1);
2601                 spin_unlock_irqrestore(&priv->lock, flags);
2602                 iwl_add_bcast_station(priv);
2603         }
2604         iwl_send_beacon_cmd(priv);
2605
2606         /* FIXME - we need to add code here to detect a totally new
2607          * configuration, reset the AP, unassoc, rxon timing, assoc,
2608          * clear sta table, add BCAST sta... */
2609 }
2610
2611 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2612                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2613                         u32 iv32, u16 *phase1key)
2614 {
2615
2616         struct iwl_priv *priv = hw->priv;
2617         IWL_DEBUG_MAC80211(priv, "enter\n");
2618
2619         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2620
2621         IWL_DEBUG_MAC80211(priv, "leave\n");
2622 }
2623
2624 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2625                            struct ieee80211_vif *vif,
2626                            struct ieee80211_sta *sta,
2627                            struct ieee80211_key_conf *key)
2628 {
2629         struct iwl_priv *priv = hw->priv;
2630         const u8 *addr;
2631         int ret;
2632         u8 sta_id;
2633         bool is_default_wep_key = false;
2634
2635         IWL_DEBUG_MAC80211(priv, "enter\n");
2636
2637         if (priv->cfg->mod_params->sw_crypto) {
2638                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2639                 return -EOPNOTSUPP;
2640         }
2641         addr = sta ? sta->addr : iwl_bcast_addr;
2642         sta_id = iwl_find_station(priv, addr);
2643         if (sta_id == IWL_INVALID_STATION) {
2644                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2645                                    addr);
2646                 return -EINVAL;
2647
2648         }
2649
2650         mutex_lock(&priv->mutex);
2651         iwl_scan_cancel_timeout(priv, 100);
2652         mutex_unlock(&priv->mutex);
2653
2654         /* If we are getting WEP group key and we didn't receive any key mapping
2655          * so far, we are in legacy wep mode (group key only), otherwise we are
2656          * in 1X mode.
2657          * In legacy wep mode, we use another host command to the uCode */
2658         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2659                 priv->iw_mode != NL80211_IFTYPE_AP) {
2660                 if (cmd == SET_KEY)
2661                         is_default_wep_key = !priv->key_mapping_key;
2662                 else
2663                         is_default_wep_key =
2664                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2665         }
2666
2667         switch (cmd) {
2668         case SET_KEY:
2669                 if (is_default_wep_key)
2670                         ret = iwl_set_default_wep_key(priv, key);
2671                 else
2672                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2673
2674                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2675                 break;
2676         case DISABLE_KEY:
2677                 if (is_default_wep_key)
2678                         ret = iwl_remove_default_wep_key(priv, key);
2679                 else
2680                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2681
2682                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2683                 break;
2684         default:
2685                 ret = -EINVAL;
2686         }
2687
2688         IWL_DEBUG_MAC80211(priv, "leave\n");
2689
2690         return ret;
2691 }
2692
2693 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2694                                 struct ieee80211_vif *vif,
2695                              enum ieee80211_ampdu_mlme_action action,
2696                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2697 {
2698         struct iwl_priv *priv = hw->priv;
2699         int ret;
2700
2701         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2702                      sta->addr, tid);
2703
2704         if (!(priv->cfg->sku & IWL_SKU_N))
2705                 return -EACCES;
2706
2707         switch (action) {
2708         case IEEE80211_AMPDU_RX_START:
2709                 IWL_DEBUG_HT(priv, "start Rx\n");
2710                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2711         case IEEE80211_AMPDU_RX_STOP:
2712                 IWL_DEBUG_HT(priv, "stop Rx\n");
2713                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2714                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2715                         return 0;
2716                 else
2717                         return ret;
2718         case IEEE80211_AMPDU_TX_START:
2719                 IWL_DEBUG_HT(priv, "start Tx\n");
2720                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2721         case IEEE80211_AMPDU_TX_STOP:
2722                 IWL_DEBUG_HT(priv, "stop Tx\n");
2723                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2724                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2725                         return 0;
2726                 else
2727                         return ret;
2728         default:
2729                 IWL_DEBUG_HT(priv, "unknown\n");
2730                 return -EINVAL;
2731                 break;
2732         }
2733         return 0;
2734 }
2735
2736 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2737                              struct ieee80211_low_level_stats *stats)
2738 {
2739         struct iwl_priv *priv = hw->priv;
2740
2741         priv = hw->priv;
2742         IWL_DEBUG_MAC80211(priv, "enter\n");
2743         IWL_DEBUG_MAC80211(priv, "leave\n");
2744
2745         return 0;
2746 }
2747
2748 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2749                                struct ieee80211_vif *vif,
2750                                enum sta_notify_cmd cmd,
2751                                struct ieee80211_sta *sta)
2752 {
2753         struct iwl_priv *priv = hw->priv;
2754         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2755         int sta_id;
2756
2757         /*
2758          * TODO: We really should use this callback to
2759          *       actually maintain the station table in
2760          *       the device.
2761          */
2762
2763         switch (cmd) {
2764         case STA_NOTIFY_ADD:
2765                 atomic_set(&sta_priv->pending_frames, 0);
2766                 if (vif->type == NL80211_IFTYPE_AP)
2767                         sta_priv->client = true;
2768                 break;
2769         case STA_NOTIFY_SLEEP:
2770                 WARN_ON(!sta_priv->client);
2771                 sta_priv->asleep = true;
2772                 if (atomic_read(&sta_priv->pending_frames) > 0)
2773                         ieee80211_sta_block_awake(hw, sta, true);
2774                 break;
2775         case STA_NOTIFY_AWAKE:
2776                 WARN_ON(!sta_priv->client);
2777                 sta_priv->asleep = false;
2778                 sta_id = iwl_find_station(priv, sta->addr);
2779                 if (sta_id != IWL_INVALID_STATION)
2780                         iwl_sta_modify_ps_wake(priv, sta_id);
2781                 break;
2782         default:
2783                 break;
2784         }
2785 }
2786
2787 /*****************************************************************************
2788  *
2789  * sysfs attributes
2790  *
2791  *****************************************************************************/
2792
2793 #ifdef CONFIG_IWLWIFI_DEBUG
2794
2795 /*
2796  * The following adds a new attribute to the sysfs representation
2797  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2798  * used for controlling the debug level.
2799  *
2800  * See the level definitions in iwl for details.
2801  *
2802  * The debug_level being managed using sysfs below is a per device debug
2803  * level that is used instead of the global debug level if it (the per
2804  * device debug level) is set.
2805  */
2806 static ssize_t show_debug_level(struct device *d,
2807                                 struct device_attribute *attr, char *buf)
2808 {
2809         struct iwl_priv *priv = dev_get_drvdata(d);
2810         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
2811 }
2812 static ssize_t store_debug_level(struct device *d,
2813                                 struct device_attribute *attr,
2814                                  const char *buf, size_t count)
2815 {
2816         struct iwl_priv *priv = dev_get_drvdata(d);
2817         unsigned long val;
2818         int ret;
2819
2820         ret = strict_strtoul(buf, 0, &val);
2821         if (ret)
2822                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2823         else {
2824                 priv->debug_level = val;
2825                 if (iwl_alloc_traffic_mem(priv))
2826                         IWL_ERR(priv,
2827                                 "Not enough memory to generate traffic log\n");
2828         }
2829         return strnlen(buf, count);
2830 }
2831
2832 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2833                         show_debug_level, store_debug_level);
2834
2835
2836 #endif /* CONFIG_IWLWIFI_DEBUG */
2837
2838
2839 static ssize_t show_temperature(struct device *d,
2840                                 struct device_attribute *attr, char *buf)
2841 {
2842         struct iwl_priv *priv = dev_get_drvdata(d);
2843
2844         if (!iwl_is_alive(priv))
2845                 return -EAGAIN;
2846
2847         return sprintf(buf, "%d\n", priv->temperature);
2848 }
2849
2850 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2851
2852 static ssize_t show_tx_power(struct device *d,
2853                              struct device_attribute *attr, char *buf)
2854 {
2855         struct iwl_priv *priv = dev_get_drvdata(d);
2856
2857         if (!iwl_is_ready_rf(priv))
2858                 return sprintf(buf, "off\n");
2859         else
2860                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2861 }
2862
2863 static ssize_t store_tx_power(struct device *d,
2864                               struct device_attribute *attr,
2865                               const char *buf, size_t count)
2866 {
2867         struct iwl_priv *priv = dev_get_drvdata(d);
2868         unsigned long val;
2869         int ret;
2870
2871         ret = strict_strtoul(buf, 10, &val);
2872         if (ret)
2873                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2874         else {
2875                 ret = iwl_set_tx_power(priv, val, false);
2876                 if (ret)
2877                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
2878                                 ret);
2879                 else
2880                         ret = count;
2881         }
2882         return ret;
2883 }
2884
2885 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2886
2887 static ssize_t show_flags(struct device *d,
2888                           struct device_attribute *attr, char *buf)
2889 {
2890         struct iwl_priv *priv = dev_get_drvdata(d);
2891
2892         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2893 }
2894
2895 static ssize_t store_flags(struct device *d,
2896                            struct device_attribute *attr,
2897                            const char *buf, size_t count)
2898 {
2899         struct iwl_priv *priv = dev_get_drvdata(d);
2900         unsigned long val;
2901         u32 flags;
2902         int ret = strict_strtoul(buf, 0, &val);
2903         if (ret)
2904                 return ret;
2905         flags = (u32)val;
2906
2907         mutex_lock(&priv->mutex);
2908         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2909                 /* Cancel any currently running scans... */
2910                 if (iwl_scan_cancel_timeout(priv, 100))
2911                         IWL_WARN(priv, "Could not cancel scan.\n");
2912                 else {
2913                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2914                         priv->staging_rxon.flags = cpu_to_le32(flags);
2915                         iwlcore_commit_rxon(priv);
2916                 }
2917         }
2918         mutex_unlock(&priv->mutex);
2919
2920         return count;
2921 }
2922
2923 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2924
2925 static ssize_t show_filter_flags(struct device *d,
2926                                  struct device_attribute *attr, char *buf)
2927 {
2928         struct iwl_priv *priv = dev_get_drvdata(d);
2929
2930         return sprintf(buf, "0x%04X\n",
2931                 le32_to_cpu(priv->active_rxon.filter_flags));
2932 }
2933
2934 static ssize_t store_filter_flags(struct device *d,
2935                                   struct device_attribute *attr,
2936                                   const char *buf, size_t count)
2937 {
2938         struct iwl_priv *priv = dev_get_drvdata(d);
2939         unsigned long val;
2940         u32 filter_flags;
2941         int ret = strict_strtoul(buf, 0, &val);
2942         if (ret)
2943                 return ret;
2944         filter_flags = (u32)val;
2945
2946         mutex_lock(&priv->mutex);
2947         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2948                 /* Cancel any currently running scans... */
2949                 if (iwl_scan_cancel_timeout(priv, 100))
2950                         IWL_WARN(priv, "Could not cancel scan.\n");
2951                 else {
2952                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2953                                        "0x%04X\n", filter_flags);
2954                         priv->staging_rxon.filter_flags =
2955                                 cpu_to_le32(filter_flags);
2956                         iwlcore_commit_rxon(priv);
2957                 }
2958         }
2959         mutex_unlock(&priv->mutex);
2960
2961         return count;
2962 }
2963
2964 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2965                    store_filter_flags);
2966
2967
2968 static ssize_t show_statistics(struct device *d,
2969                                struct device_attribute *attr, char *buf)
2970 {
2971         struct iwl_priv *priv = dev_get_drvdata(d);
2972         u32 size = sizeof(struct iwl_notif_statistics);
2973         u32 len = 0, ofs = 0;
2974         u8 *data = (u8 *)&priv->statistics;
2975         int rc = 0;
2976
2977         if (!iwl_is_alive(priv))
2978                 return -EAGAIN;
2979
2980         mutex_lock(&priv->mutex);
2981         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
2982         mutex_unlock(&priv->mutex);
2983
2984         if (rc) {
2985                 len = sprintf(buf,
2986                               "Error sending statistics request: 0x%08X\n", rc);
2987                 return len;
2988         }
2989
2990         while (size && (PAGE_SIZE - len)) {
2991                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2992                                    PAGE_SIZE - len, 1);
2993                 len = strlen(buf);
2994                 if (PAGE_SIZE - len)
2995                         buf[len++] = '\n';
2996
2997                 ofs += 16;
2998                 size -= min(size, 16U);
2999         }
3000
3001         return len;
3002 }
3003
3004 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3005
3006 static ssize_t show_rts_ht_protection(struct device *d,
3007                              struct device_attribute *attr, char *buf)
3008 {
3009         struct iwl_priv *priv = dev_get_drvdata(d);
3010
3011         return sprintf(buf, "%s\n",
3012                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3013 }
3014
3015 static ssize_t store_rts_ht_protection(struct device *d,
3016                               struct device_attribute *attr,
3017                               const char *buf, size_t count)
3018 {
3019         struct iwl_priv *priv = dev_get_drvdata(d);
3020         unsigned long val;
3021         int ret;
3022
3023         ret = strict_strtoul(buf, 10, &val);
3024         if (ret)
3025                 IWL_INFO(priv, "Input is not in decimal form.\n");
3026         else {
3027                 if (!iwl_is_associated(priv))
3028                         priv->cfg->use_rts_for_ht = val ? true : false;
3029                 else
3030                         IWL_ERR(priv, "Sta associated with AP - "
3031                                 "Change protection mechanism is not allowed\n");
3032                 ret = count;
3033         }
3034         return ret;
3035 }
3036
3037 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3038                         show_rts_ht_protection, store_rts_ht_protection);
3039
3040
3041 /*****************************************************************************
3042  *
3043  * driver setup and teardown
3044  *
3045  *****************************************************************************/
3046
3047 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3048 {
3049         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3050
3051         init_waitqueue_head(&priv->wait_command_queue);
3052
3053         INIT_WORK(&priv->up, iwl_bg_up);
3054         INIT_WORK(&priv->restart, iwl_bg_restart);
3055         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3056         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3057         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3058         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3059         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3060
3061         iwl_setup_scan_deferred_work(priv);
3062
3063         if (priv->cfg->ops->lib->setup_deferred_work)
3064                 priv->cfg->ops->lib->setup_deferred_work(priv);
3065
3066         init_timer(&priv->statistics_periodic);
3067         priv->statistics_periodic.data = (unsigned long)priv;
3068         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3069
3070         if (!priv->cfg->use_isr_legacy)
3071                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3072                         iwl_irq_tasklet, (unsigned long)priv);
3073         else
3074                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3075                         iwl_irq_tasklet_legacy, (unsigned long)priv);
3076 }
3077
3078 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3079 {
3080         if (priv->cfg->ops->lib->cancel_deferred_work)
3081                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3082
3083         cancel_delayed_work_sync(&priv->init_alive_start);
3084         cancel_delayed_work(&priv->scan_check);
3085         cancel_delayed_work(&priv->alive_start);
3086         cancel_work_sync(&priv->beacon_update);
3087         del_timer_sync(&priv->statistics_periodic);
3088 }
3089
3090 static void iwl_init_hw_rates(struct iwl_priv *priv,
3091                               struct ieee80211_rate *rates)
3092 {
3093         int i;
3094
3095         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3096                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3097                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3098                 rates[i].hw_value_short = i;
3099                 rates[i].flags = 0;
3100                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3101                         /*
3102                          * If CCK != 1M then set short preamble rate flag.
3103                          */
3104                         rates[i].flags |=
3105                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3106                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3107                 }
3108         }
3109 }
3110
3111 static int iwl_init_drv(struct iwl_priv *priv)
3112 {
3113         int ret;
3114
3115         priv->ibss_beacon = NULL;
3116
3117         spin_lock_init(&priv->lock);
3118         spin_lock_init(&priv->sta_lock);
3119         spin_lock_init(&priv->hcmd_lock);
3120
3121         INIT_LIST_HEAD(&priv->free_frames);
3122
3123         mutex_init(&priv->mutex);
3124
3125         /* Clear the driver's (not device's) station table */
3126         iwl_clear_stations_table(priv);
3127
3128         priv->ieee_channels = NULL;
3129         priv->ieee_rates = NULL;
3130         priv->band = IEEE80211_BAND_2GHZ;
3131
3132         priv->iw_mode = NL80211_IFTYPE_STATION;
3133         if (priv->cfg->support_sm_ps)
3134                 priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DYNAMIC;
3135         else
3136                 priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
3137
3138         /* Choose which receivers/antennas to use */
3139         if (priv->cfg->ops->hcmd->set_rxon_chain)
3140                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3141
3142         iwl_init_scan_params(priv);
3143
3144         iwl_reset_qos(priv);
3145
3146         priv->qos_data.qos_active = 0;
3147         priv->qos_data.qos_cap.val = 0;
3148
3149         priv->rates_mask = IWL_RATES_MASK;
3150         /* Set the tx_power_user_lmt to the lowest power level
3151          * this value will get overwritten by channel max power avg
3152          * from eeprom */
3153         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
3154
3155         ret = iwl_init_channel_map(priv);
3156         if (ret) {
3157                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3158                 goto err;
3159         }
3160
3161         ret = iwlcore_init_geos(priv);
3162         if (ret) {
3163                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3164                 goto err_free_channel_map;
3165         }
3166         iwl_init_hw_rates(priv, priv->ieee_rates);
3167
3168         return 0;
3169
3170 err_free_channel_map:
3171         iwl_free_channel_map(priv);
3172 err:
3173         return ret;
3174 }
3175
3176 static void iwl_uninit_drv(struct iwl_priv *priv)
3177 {
3178         iwl_calib_free_results(priv);
3179         iwlcore_free_geos(priv);
3180         iwl_free_channel_map(priv);
3181         kfree(priv->scan);
3182 }
3183
3184 static struct attribute *iwl_sysfs_entries[] = {
3185         &dev_attr_flags.attr,
3186         &dev_attr_filter_flags.attr,
3187         &dev_attr_statistics.attr,
3188         &dev_attr_temperature.attr,
3189         &dev_attr_tx_power.attr,
3190         &dev_attr_rts_ht_protection.attr,
3191 #ifdef CONFIG_IWLWIFI_DEBUG
3192         &dev_attr_debug_level.attr,
3193 #endif
3194         NULL
3195 };
3196
3197 static struct attribute_group iwl_attribute_group = {
3198         .name = NULL,           /* put in device directory */
3199         .attrs = iwl_sysfs_entries,
3200 };
3201
3202 static struct ieee80211_ops iwl_hw_ops = {
3203         .tx = iwl_mac_tx,
3204         .start = iwl_mac_start,
3205         .stop = iwl_mac_stop,
3206         .add_interface = iwl_mac_add_interface,
3207         .remove_interface = iwl_mac_remove_interface,
3208         .config = iwl_mac_config,
3209         .configure_filter = iwl_configure_filter,
3210         .set_key = iwl_mac_set_key,
3211         .update_tkip_key = iwl_mac_update_tkip_key,
3212         .get_stats = iwl_mac_get_stats,
3213         .get_tx_stats = iwl_mac_get_tx_stats,
3214         .conf_tx = iwl_mac_conf_tx,
3215         .reset_tsf = iwl_mac_reset_tsf,
3216         .bss_info_changed = iwl_bss_info_changed,
3217         .ampdu_action = iwl_mac_ampdu_action,
3218         .hw_scan = iwl_mac_hw_scan,
3219         .sta_notify = iwl_mac_sta_notify,
3220 };
3221
3222 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3223 {
3224         int err = 0;
3225         struct iwl_priv *priv;
3226         struct ieee80211_hw *hw;
3227         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3228         unsigned long flags;
3229         u16 pci_cmd;
3230
3231         /************************
3232          * 1. Allocating HW data
3233          ************************/
3234
3235         /* Disabling hardware scan means that mac80211 will perform scans
3236          * "the hard way", rather than using device's scan. */
3237         if (cfg->mod_params->disable_hw_scan) {
3238                 if (iwl_debug_level & IWL_DL_INFO)
3239                         dev_printk(KERN_DEBUG, &(pdev->dev),
3240                                    "Disabling hw_scan\n");
3241                 iwl_hw_ops.hw_scan = NULL;
3242         }
3243
3244         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3245         if (!hw) {
3246                 err = -ENOMEM;
3247                 goto out;
3248         }
3249         priv = hw->priv;
3250         /* At this point both hw and priv are allocated. */
3251
3252         SET_IEEE80211_DEV(hw, &pdev->dev);
3253
3254         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3255         priv->cfg = cfg;
3256         priv->pci_dev = pdev;
3257         priv->inta_mask = CSR_INI_SET_MASK;
3258
3259 #ifdef CONFIG_IWLWIFI_DEBUG
3260         atomic_set(&priv->restrict_refcnt, 0);
3261 #endif
3262         if (iwl_alloc_traffic_mem(priv))
3263                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3264
3265         /**************************
3266          * 2. Initializing PCI bus
3267          **************************/
3268         if (pci_enable_device(pdev)) {
3269                 err = -ENODEV;
3270                 goto out_ieee80211_free_hw;
3271         }
3272
3273         pci_set_master(pdev);
3274
3275         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3276         if (!err)
3277                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3278         if (err) {
3279                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3280                 if (!err)
3281                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3282                 /* both attempts failed: */
3283                 if (err) {
3284                         IWL_WARN(priv, "No suitable DMA available.\n");
3285                         goto out_pci_disable_device;
3286                 }
3287         }
3288
3289         err = pci_request_regions(pdev, DRV_NAME);
3290         if (err)
3291                 goto out_pci_disable_device;
3292
3293         pci_set_drvdata(pdev, priv);
3294
3295
3296         /***********************
3297          * 3. Read REV register
3298          ***********************/
3299         priv->hw_base = pci_iomap(pdev, 0, 0);
3300         if (!priv->hw_base) {
3301                 err = -ENODEV;
3302                 goto out_pci_release_regions;
3303         }
3304
3305         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3306                 (unsigned long long) pci_resource_len(pdev, 0));
3307         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3308
3309         /* this spin lock will be used in apm_ops.init and EEPROM access
3310          * we should init now
3311          */
3312         spin_lock_init(&priv->reg_lock);
3313         iwl_hw_detect(priv);
3314         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3315                 priv->cfg->name, priv->hw_rev);
3316
3317         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3318          * PCI Tx retries from interfering with C3 CPU state */
3319         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3320
3321         iwl_prepare_card_hw(priv);
3322         if (!priv->hw_ready) {
3323                 IWL_WARN(priv, "Failed, HW not ready\n");
3324                 goto out_iounmap;
3325         }
3326
3327         /*****************
3328          * 4. Read EEPROM
3329          *****************/
3330         /* Read the EEPROM */
3331         err = iwl_eeprom_init(priv);
3332         if (err) {
3333                 IWL_ERR(priv, "Unable to init EEPROM\n");
3334                 goto out_iounmap;
3335         }
3336         err = iwl_eeprom_check_version(priv);
3337         if (err)
3338                 goto out_free_eeprom;
3339
3340         /* extract MAC Address */
3341         iwl_eeprom_get_mac(priv, priv->mac_addr);
3342         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3343         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3344
3345         /************************
3346          * 5. Setup HW constants
3347          ************************/
3348         if (iwl_set_hw_params(priv)) {
3349                 IWL_ERR(priv, "failed to set hw parameters\n");
3350                 goto out_free_eeprom;
3351         }
3352
3353         /*******************
3354          * 6. Setup priv
3355          *******************/
3356
3357         err = iwl_init_drv(priv);
3358         if (err)
3359                 goto out_free_eeprom;
3360         /* At this point both hw and priv are initialized. */
3361
3362         /********************
3363          * 7. Setup services
3364          ********************/
3365         spin_lock_irqsave(&priv->lock, flags);
3366         iwl_disable_interrupts(priv);
3367         spin_unlock_irqrestore(&priv->lock, flags);
3368
3369         pci_enable_msi(priv->pci_dev);
3370
3371         iwl_alloc_isr_ict(priv);
3372         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3373                           IRQF_SHARED, DRV_NAME, priv);
3374         if (err) {
3375                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3376                 goto out_disable_msi;
3377         }
3378         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3379         if (err) {
3380                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3381                 goto out_free_irq;
3382         }
3383
3384         iwl_setup_deferred_work(priv);
3385         iwl_setup_rx_handlers(priv);
3386
3387         /**********************************
3388          * 8. Setup and register mac80211
3389          **********************************/
3390
3391         /* enable interrupts if needed: hw bug w/a */
3392         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3393         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3394                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3395                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3396         }
3397
3398         iwl_enable_interrupts(priv);
3399
3400         err = iwl_setup_mac(priv);
3401         if (err)
3402                 goto out_remove_sysfs;
3403
3404         err = iwl_dbgfs_register(priv, DRV_NAME);
3405         if (err)
3406                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3407
3408         /* If platform's RF_KILL switch is NOT set to KILL */
3409         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3410                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3411         else
3412                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3413
3414         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3415                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3416
3417         iwl_power_initialize(priv);
3418         iwl_tt_initialize(priv);
3419         return 0;
3420
3421  out_remove_sysfs:
3422         destroy_workqueue(priv->workqueue);
3423         priv->workqueue = NULL;
3424         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3425  out_free_irq:
3426         free_irq(priv->pci_dev->irq, priv);
3427         iwl_free_isr_ict(priv);
3428  out_disable_msi:
3429         pci_disable_msi(priv->pci_dev);
3430         iwl_uninit_drv(priv);
3431  out_free_eeprom:
3432         iwl_eeprom_free(priv);
3433  out_iounmap:
3434         pci_iounmap(pdev, priv->hw_base);
3435  out_pci_release_regions:
3436         pci_set_drvdata(pdev, NULL);
3437         pci_release_regions(pdev);
3438  out_pci_disable_device:
3439         pci_disable_device(pdev);
3440  out_ieee80211_free_hw:
3441         iwl_free_traffic_mem(priv);
3442         ieee80211_free_hw(priv->hw);
3443  out:
3444         return err;
3445 }
3446
3447 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3448 {
3449         struct iwl_priv *priv = pci_get_drvdata(pdev);
3450         unsigned long flags;
3451
3452         if (!priv)
3453                 return;
3454
3455         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3456
3457         iwl_dbgfs_unregister(priv);
3458         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3459
3460         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3461          * to be called and iwl_down since we are removing the device
3462          * we need to set STATUS_EXIT_PENDING bit.
3463          */
3464         set_bit(STATUS_EXIT_PENDING, &priv->status);
3465         if (priv->mac80211_registered) {
3466                 ieee80211_unregister_hw(priv->hw);
3467                 priv->mac80211_registered = 0;
3468         } else {
3469                 iwl_down(priv);
3470         }
3471
3472         /*
3473          * Make sure device is reset to low power before unloading driver.
3474          * This may be redundant with iwl_down(), but there are paths to
3475          * run iwl_down() without calling apm_ops.stop(), and there are
3476          * paths to avoid running iwl_down() at all before leaving driver.
3477          * This (inexpensive) call *makes sure* device is reset.
3478          */
3479         priv->cfg->ops->lib->apm_ops.stop(priv);
3480
3481         iwl_tt_exit(priv);
3482
3483         /* make sure we flush any pending irq or
3484          * tasklet for the driver
3485          */
3486         spin_lock_irqsave(&priv->lock, flags);
3487         iwl_disable_interrupts(priv);
3488         spin_unlock_irqrestore(&priv->lock, flags);
3489
3490         iwl_synchronize_irq(priv);
3491
3492         iwl_dealloc_ucode_pci(priv);
3493
3494         if (priv->rxq.bd)
3495                 iwl_rx_queue_free(priv, &priv->rxq);
3496         iwl_hw_txq_ctx_free(priv);
3497
3498         iwl_clear_stations_table(priv);
3499         iwl_eeprom_free(priv);
3500
3501
3502         /*netif_stop_queue(dev); */
3503         flush_workqueue(priv->workqueue);
3504
3505         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3506          * priv->workqueue... so we can't take down the workqueue
3507          * until now... */
3508         destroy_workqueue(priv->workqueue);
3509         priv->workqueue = NULL;
3510         iwl_free_traffic_mem(priv);
3511
3512         free_irq(priv->pci_dev->irq, priv);
3513         pci_disable_msi(priv->pci_dev);
3514         pci_iounmap(pdev, priv->hw_base);
3515         pci_release_regions(pdev);
3516         pci_disable_device(pdev);
3517         pci_set_drvdata(pdev, NULL);
3518
3519         iwl_uninit_drv(priv);
3520
3521         iwl_free_isr_ict(priv);
3522
3523         if (priv->ibss_beacon)
3524                 dev_kfree_skb(priv->ibss_beacon);
3525
3526         ieee80211_free_hw(priv->hw);
3527 }
3528
3529
3530 /*****************************************************************************
3531  *
3532  * driver and module entry point
3533  *
3534  *****************************************************************************/
3535
3536 /* Hardware specific file defines the PCI IDs table for that hardware module */
3537 static struct pci_device_id iwl_hw_card_ids[] = {
3538 #ifdef CONFIG_IWL4965
3539         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3540         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3541 #endif /* CONFIG_IWL4965 */
3542 #ifdef CONFIG_IWL5000
3543         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3544         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3545         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3546         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3547         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3548         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3549         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3550         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3551         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3552         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3553 /* 5350 WiFi/WiMax */
3554         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3555         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3556         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3557 /* 5150 Wifi/WiMax */
3558         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3559         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3560
3561 /* 6x00 Series */
3562         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3563         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3564         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3565         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3566         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3567         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3568         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3569         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3570         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3571         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3572
3573 /* 6x50 WiFi/WiMax Series */
3574         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3575         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3576         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3577         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3578         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3579         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3580
3581 /* 1000 Series WiFi */
3582         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3583         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3584         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3585         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3586         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3587         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3588         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3589         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3590         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3591         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3592         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3593         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3594 #endif /* CONFIG_IWL5000 */
3595
3596         {0}
3597 };
3598 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3599
3600 static struct pci_driver iwl_driver = {
3601         .name = DRV_NAME,
3602         .id_table = iwl_hw_card_ids,
3603         .probe = iwl_pci_probe,
3604         .remove = __devexit_p(iwl_pci_remove),
3605 #ifdef CONFIG_PM
3606         .suspend = iwl_pci_suspend,
3607         .resume = iwl_pci_resume,
3608 #endif
3609 };
3610
3611 static int __init iwl_init(void)
3612 {
3613
3614         int ret;
3615         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3616         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3617
3618         ret = iwlagn_rate_control_register();
3619         if (ret) {
3620                 printk(KERN_ERR DRV_NAME
3621                        "Unable to register rate control algorithm: %d\n", ret);
3622                 return ret;
3623         }
3624
3625         ret = pci_register_driver(&iwl_driver);
3626         if (ret) {
3627                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3628                 goto error_register;
3629         }
3630
3631         return ret;
3632
3633 error_register:
3634         iwlagn_rate_control_unregister();
3635         return ret;
3636 }
3637
3638 static void __exit iwl_exit(void)
3639 {
3640         pci_unregister_driver(&iwl_driver);
3641         iwlagn_rate_control_unregister();
3642 }
3643
3644 module_exit(iwl_exit);
3645 module_init(iwl_init);
3646
3647 #ifdef CONFIG_IWLWIFI_DEBUG
3648 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3649 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3650 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3651 MODULE_PARM_DESC(debug, "debug output mask");
3652 #endif
3653