SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #define DRV_NAME        "iwlagn"
  48
  49 #include "iwl-eeprom.h"
  50 #include "iwl-dev.h"
  51 #include "iwl-core.h"
  52 #include "iwl-io.h"
  53 #include "iwl-helpers.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-calib.h"
  56
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  76 #define VS "s"
  77 #else
  78 #define VS
  79 #endif
  80
  81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("iwl4965");
  89
  90 /*************** STATION TABLE MANAGEMENT ****
  91  * mac80211 should be examined to determine if sta_info is duplicating
  92  * the functionality provided here
  93  */
  94
  95 /**************************************************************/
  96
  97 /**
  98  * iwl_commit_rxon - commit staging_rxon to hardware
  99  *
 100  * The RXON command in staging_rxon is committed to the hardware and
 101  * the active_rxon structure is updated with the new data.  This
 102  * function correctly transitions out of the RXON_ASSOC_MSK state if
 103  * a HW tune is required based on the RXON structure changes.
 104  */
 105 int iwl_commit_rxon(struct iwl_priv *priv)
 106 {
 107         /* cast away the const for active_rxon in this function */
 108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 109         int ret;
 110         bool new_assoc =
 111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 112
 113         if (!iwl_is_alive(priv))
 114                 return -EBUSY;
 115
 116         /* always get timestamp with Rx frame */
 117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 118         /* allow CTS-to-self if possible. this is relevant only for
 119          * 5000, but will not damage 4965 */
 120         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 121
 122         ret = iwl_check_rxon_cmd(priv);
 123         if (ret) {
 124                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 125                 return -EINVAL;
 126         }
 127
 128         /* If we don't need to send a full RXON, we can use
 129          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 130          * and other flags for the current radio configuration. */
 131         if (!iwl_full_rxon_required(priv)) {
 132                 ret = iwl_send_rxon_assoc(priv);
 133                 if (ret) {
 134                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 135                         return ret;
 136                 }
 137
 138                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 139                 return 0;
 140         }
 141
 142         /* station table will be cleared */
 143         priv->assoc_station_added = 0;
 144
 145         /* If we are currently associated and the new config requires
 146          * an RXON_ASSOC and the new config wants the associated mask enabled,
 147          * we must clear the associated from the active configuration
 148          * before we apply the new config */
 149         if (iwl_is_associated(priv) && new_assoc) {
 150                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 151                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 152
 153                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 154                                       sizeof(struct iwl_rxon_cmd),
 155                                       &priv->active_rxon);
 156
 157                 /* If the mask clearing failed then we set
 158                  * active_rxon back to what it was previously */
 159                 if (ret) {
 160                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 161                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 162                         return ret;
 163                 }
 164         }
 165
 166         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 167                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 168                        "* channel = %d\n"
 169                        "* bssid = %pM\n",
 170                        (new_assoc ? "" : "out"),
 171                        le16_to_cpu(priv->staging_rxon.channel),
 172                        priv->staging_rxon.bssid_addr);
 173
 174         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 175
 176         /* Apply the new configuration
 177          * RXON unassoc clears the station table in uCode, send it before
 178          * we add the bcast station. If assoc bit is set, we will send RXON
 179          * after having added the bcast and bssid station.
 180          */
 181         if (!new_assoc) {
 182                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 183                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 184                 if (ret) {
 185                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 186                         return ret;
 187                 }
 188                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 189         }
 190
 191         iwl_clear_stations_table(priv);
 192
 193         priv->start_calib = 0;
 194
 195         /* Add the broadcast address so we can send broadcast frames */
 196         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 197                                                 IWL_INVALID_STATION) {
 198                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 199                 return -EIO;
 200         }
 201
 202         /* If we have set the ASSOC_MSK and we are in BSS mode then
 203          * add the IWL_AP_ID to the station rate table */
 204         if (new_assoc) {
 205                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 206                         ret = iwl_rxon_add_station(priv,
 207                                            priv->active_rxon.bssid_addr, 1);
 208                         if (ret == IWL_INVALID_STATION) {
 209                                 IWL_ERR(priv,
 210                                         "Error adding AP address for TX.\n");
 211                                 return -EIO;
 212                         }
 213                         priv->assoc_station_added = 1;
 214                         if (priv->default_wep_key &&
 215                             iwl_send_static_wepkey_cmd(priv, 0))
 216                                 IWL_ERR(priv,
 217                                         "Could not send WEP static key.\n");
 218                 }
 219
 220                 /* Apply the new configuration
 221                  * RXON assoc doesn't clear the station table in uCode,
 222                  */
 223                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 224                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 225                 if (ret) {
 226                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 227                         return ret;
 228                 }
 229                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 230         }
 231
 232         iwl_init_sensitivity(priv);
 233
 234         /* If we issue a new RXON command which required a tune then we must
 235          * send a new TXPOWER command or we won't be able to Tx any frames */
 236         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 237         if (ret) {
 238                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 239                 return ret;
 240         }
 241
 242         return 0;
 243 }
 244
 245 void iwl_update_chain_flags(struct iwl_priv *priv)
 246 {
 247
 248         if (priv->cfg->ops->hcmd->set_rxon_chain)
 249                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 250         iwlcore_commit_rxon(priv);
 251 }
 252
 253 static void iwl_clear_free_frames(struct iwl_priv *priv)
 254 {
 255         struct list_head *element;
 256
 257         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 258                        priv->frames_count);
 259
 260         while (!list_empty(&priv->free_frames)) {
 261                 element = priv->free_frames.next;
 262                 list_del(element);
 263                 kfree(list_entry(element, struct iwl_frame, list));
 264                 priv->frames_count--;
 265         }
 266
 267         if (priv->frames_count) {
 268                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 269                             priv->frames_count);
 270                 priv->frames_count = 0;
 271         }
 272 }
 273
 274 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 275 {
 276         struct iwl_frame *frame;
 277         struct list_head *element;
 278         if (list_empty(&priv->free_frames)) {
 279                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 280                 if (!frame) {
 281                         IWL_ERR(priv, "Could not allocate frame!\n");
 282                         return NULL;
 283                 }
 284
 285                 priv->frames_count++;
 286                 return frame;
 287         }
 288
 289         element = priv->free_frames.next;
 290         list_del(element);
 291         return list_entry(element, struct iwl_frame, list);
 292 }
 293
 294 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 295 {
 296         memset(frame, 0, sizeof(*frame));
 297         list_add(&frame->list, &priv->free_frames);
 298 }
 299
 300 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 301                                           struct ieee80211_hdr *hdr,
 302                                           int left)
 303 {
 304         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 305             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 306              (priv->iw_mode != NL80211_IFTYPE_AP)))
 307                 return 0;
 308
 309         if (priv->ibss_beacon->len > left)
 310                 return 0;
 311
 312         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 313
 314         return priv->ibss_beacon->len;
 315 }
 316
 317 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 318                                        struct iwl_frame *frame, u8 rate)
 319 {
 320         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 321         unsigned int frame_size;
 322
 323         tx_beacon_cmd = &frame->u.beacon;
 324         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 325
 326         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 327         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 328
 329         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 330                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 331
 332         BUG_ON(frame_size > MAX_MPDU_SIZE);
 333         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 334
 335         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 336                 tx_beacon_cmd->tx.rate_n_flags =
 337                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 338         else
 339                 tx_beacon_cmd->tx.rate_n_flags =
 340                         iwl_hw_set_rate_n_flags(rate, 0);
 341
 342         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 343                                      TX_CMD_FLG_TSF_MSK |
 344                                      TX_CMD_FLG_STA_RATE_MSK;
 345
 346         return sizeof(*tx_beacon_cmd) + frame_size;
 347 }
 348 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 349 {
 350         struct iwl_frame *frame;
 351         unsigned int frame_size;
 352         int rc;
 353         u8 rate;
 354
 355         frame = iwl_get_free_frame(priv);
 356
 357         if (!frame) {
 358                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 359                           "command.\n");
 360                 return -ENOMEM;
 361         }
 362
 363         rate = iwl_rate_get_lowest_plcp(priv);
 364
 365         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 366
 367         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 368                               &frame->u.cmd[0]);
 369
 370         iwl_free_frame(priv, frame);
 371
 372         return rc;
 373 }
 374
 375 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 376 {
 377         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 378
 379         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 380         if (sizeof(dma_addr_t) > sizeof(u32))
 381                 addr |=
 382                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 383
 384         return addr;
 385 }
 386
 387 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 388 {
 389         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 390
 391         return le16_to_cpu(tb->hi_n_len) >> 4;
 392 }
 393
 394 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 395                                   dma_addr_t addr, u16 len)
 396 {
 397         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 398         u16 hi_n_len = len << 4;
 399
 400         put_unaligned_le32(addr, &tb->lo);
 401         if (sizeof(dma_addr_t) > sizeof(u32))
 402                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 403
 404         tb->hi_n_len = cpu_to_le16(hi_n_len);
 405
 406         tfd->num_tbs = idx + 1;
 407 }
 408
 409 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 410 {
 411         return tfd->num_tbs & 0x1f;
 412 }
 413
 414 /**
 415  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 416  * @priv - driver private data
 417  * @txq - tx queue
 418  *
 419  * Does NOT advance any TFD circular buffer read/write indexes
 420  * Does NOT free the TFD itself (which is within circular buffer)
 421  */
 422 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 423 {
 424         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 425         struct iwl_tfd *tfd;
 426         struct pci_dev *dev = priv->pci_dev;
 427         int index = txq->q.read_ptr;
 428         int i;
 429         int num_tbs;
 430
 431         tfd = &tfd_tmp[index];
 432
 433         /* Sanity check on number of chunks */
 434         num_tbs = iwl_tfd_get_num_tbs(tfd);
 435
 436         if (num_tbs >= IWL_NUM_OF_TBS) {
 437                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 438                 /* @todo issue fatal error, it is quite serious situation */
 439                 return;
 440         }
 441
 442         /* Unmap tx_cmd */
 443         if (num_tbs)
 444                 pci_unmap_single(dev,
 445                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
 446                                 pci_unmap_len(&txq->cmd[index]->meta, len),
 447                                 PCI_DMA_BIDIRECTIONAL);
 448
 449         /* Unmap chunks, if any. */
 450         for (i = 1; i < num_tbs; i++) {
 451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 453
 454                 if (txq->txb) {
 455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 457                 }
 458         }
 459 }
 460
 461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 462                                  struct iwl_tx_queue *txq,
 463                                  dma_addr_t addr, u16 len,
 464                                  u8 reset, u8 pad)
 465 {
 466         struct iwl_queue *q;
 467         struct iwl_tfd *tfd, *tfd_tmp;
 468         u32 num_tbs;
 469
 470         q = &txq->q;
 471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 472         tfd = &tfd_tmp[q->write_ptr];
 473
 474         if (reset)
 475                 memset(tfd, 0, sizeof(*tfd));
 476
 477         num_tbs = iwl_tfd_get_num_tbs(tfd);
 478
 479         /* Each TFD can point to a maximum 20 Tx buffers */
 480         if (num_tbs >= IWL_NUM_OF_TBS) {
 481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 482                           IWL_NUM_OF_TBS);
 483                 return -EINVAL;
 484         }
 485
 486         BUG_ON(addr & ~DMA_BIT_MASK(36));
 487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 488                 IWL_ERR(priv, "Unaligned address = %llx\n",
 489                           (unsigned long long)addr);
 490
 491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 498  * given Tx queue, and enable the DMA channel used for that queue.
 499  *
 500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 501  * channels supported in hardware.
 502  */
 503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 504                          struct iwl_tx_queue *txq)
 505 {
 506         int txq_id = txq->q.id;
 507
 508         /* Circular buffer (TFD queue in DRAM) physical base address */
 509         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 510                              txq->q.dma_addr >> 8);
 511
 512         return 0;
 513 }
 514
 515 /******************************************************************************
 516  *
 517  * Generic RX handler implementations
 518  *
 519  ******************************************************************************/
 520 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 521                                 struct iwl_rx_mem_buffer *rxb)
 522 {
 523         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 524         struct iwl_alive_resp *palive;
 525         struct delayed_work *pwork;
 526
 527         palive = &pkt->u.alive_frame;
 528
 529         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 530                        "0x%01X 0x%01X\n",
 531                        palive->is_valid, palive->ver_type,
 532                        palive->ver_subtype);
 533
 534         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 535                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 536                 set_bit(STATUS_INIT_UCODE_ALIVE, &priv->status);
 537                 wake_up_interruptible(&priv->wait_command_queue);
 538                 memcpy(&priv->card_alive_init,
 539                        &pkt->u.alive_frame,
 540                        sizeof(struct iwl_init_alive_resp));
 541                 pwork = &priv->init_alive_start;
 542         } else {
 543                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 544                 set_bit(STATUS_RT_UCODE_ALIVE, &priv->status);
 545                 wake_up_interruptible(&priv->wait_command_queue);
 546                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 547                        sizeof(struct iwl_alive_resp));
 548                 pwork = &priv->alive_start;
 549         }
 550
 551         /* We delay the ALIVE response by 5ms to
 552          * give the HW RF Kill time to activate... */
 553         if (palive->is_valid == UCODE_VALID_OK)
 554                 queue_delayed_work(priv->workqueue, pwork,
 555                                    msecs_to_jiffies(5));
 556         else
 557                 IWL_WARN(priv, "uCode did not respond OK.\n");
 558 }
 559
 560 static void iwl_bg_beacon_update(struct work_struct *work)
 561 {
 562         struct iwl_priv *priv =
 563                 container_of(work, struct iwl_priv, beacon_update);
 564         struct sk_buff *beacon;
 565
 566         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 567         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 568
 569         if (!beacon) {
 570                 IWL_ERR(priv, "update beacon failed\n");
 571                 return;
 572         }
 573
 574         mutex_lock(&priv->mutex);
 575         /* new beacon skb is allocated every time; dispose previous.*/
 576         if (priv->ibss_beacon)
 577                 dev_kfree_skb(priv->ibss_beacon);
 578
 579         priv->ibss_beacon = beacon;
 580         mutex_unlock(&priv->mutex);
 581
 582         iwl_send_beacon_cmd(priv);
 583 }
 584
 585 /**
 586  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 587  *
 588  * This callback is provided in order to send a statistics request.
 589  *
 590  * This timer function is continually reset to execute within
 591  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 592  * was received.  We need to ensure we receive the statistics in order
 593  * to update the temperature used for calibrating the TXPOWER.
 594  */
 595 static void iwl_bg_statistics_periodic(unsigned long data)
 596 {
 597         struct iwl_priv *priv = (struct iwl_priv *)data;
 598
 599         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 600                 return;
 601
 602         /* dont send host command if rf-kill is on */
 603         if (!iwl_is_ready_rf(priv))
 604                 return;
 605
 606         iwl_send_statistics_request(priv, CMD_ASYNC);
 607 }
 608
 609 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 610                                 struct iwl_rx_mem_buffer *rxb)
 611 {
 612 #ifdef CONFIG_IWLWIFI_DEBUG
 613         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 614         struct iwl4965_beacon_notif *beacon =
 615                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 616         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 617
 618         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 619                 "tsf %d %d rate %d\n",
 620                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 621                 beacon->beacon_notify_hdr.failure_frame,
 622                 le32_to_cpu(beacon->ibss_mgr_status),
 623                 le32_to_cpu(beacon->high_tsf),
 624                 le32_to_cpu(beacon->low_tsf), rate);
 625 #endif
 626
 627         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 628             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 629                 queue_work(priv->workqueue, &priv->beacon_update);
 630 }
 631
 632 /* Handle notification from uCode that card's power state is changing
 633  * due to software, hardware, or critical temperature RFKILL */
 634 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 635                                     struct iwl_rx_mem_buffer *rxb)
 636 {
 637         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 638         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 639         unsigned long status = priv->status;
 640         unsigned long reg_flags;
 641
 642         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 643                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 644                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 645
 646         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 647                      RF_CARD_DISABLED)) {
 648
 649                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 650                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 651
 652                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 653                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 654
 655                 if (!(flags & RXON_CARD_DISABLED)) {
 656                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 657                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 658                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 659                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 660
 661                 }
 662
 663                 if (flags & RF_CARD_DISABLED) {
 664                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 665                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 666                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 667                         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 668                         if (!iwl_grab_nic_access(priv))
 669                                 iwl_release_nic_access(priv);
 670                         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 671                 }
 672         }
 673
 674         if (flags & HW_CARD_DISABLED)
 675                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 676         else
 677                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 678
 679
 680         if (!(flags & RXON_CARD_DISABLED))
 681                 iwl_scan_cancel(priv);
 682
 683         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 684              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 685                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 686                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 687         else
 688                 wake_up_interruptible(&priv->wait_command_queue);
 689 }
 690
 691 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 692 {
 693         if (src == IWL_PWR_SRC_VAUX) {
 694                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 695                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 696                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 697                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 698         } else {
 699                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 700                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 701                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 702         }
 703
 704         return 0;
 705 }
 706
 707 /**
 708  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 709  *
 710  * Setup the RX handlers for each of the reply types sent from the uCode
 711  * to the host.
 712  *
 713  * This function chains into the hardware specific files for them to setup
 714  * any hardware specific handlers as well.
 715  */
 716 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 717 {
 718         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 719         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 720         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 721         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 722         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 723             iwl_rx_pm_debug_statistics_notif;
 724         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 725
 726         /*
 727          * The same handler is used for both the REPLY to a discrete
 728          * statistics request from the host as well as for the periodic
 729          * statistics notifications (after received beacons) from the uCode.
 730          */
 731         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 732         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 733
 734         iwl_setup_spectrum_handlers(priv);
 735         iwl_setup_rx_scan_handlers(priv);
 736
 737         /* status change handler */
 738         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 739
 740         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 741             iwl_rx_missed_beacon_notif;
 742         /* Rx handlers */
 743         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 744         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 745         /* block ack */
 746         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 747         /* Set up hardware specific Rx handlers */
 748         priv->cfg->ops->lib->rx_handler_setup(priv);
 749 }
 750
 751 /**
 752  * iwl_rx_handle - Main entry function for receiving responses from uCode
 753  *
 754  * Uses the priv->rx_handlers callback function array to invoke
 755  * the appropriate handlers, including command responses,
 756  * frame-received notifications, and other notifications.
 757  */
 758 void iwl_rx_handle(struct iwl_priv *priv)
 759 {
 760         struct iwl_rx_mem_buffer *rxb;
 761         struct iwl_rx_packet *pkt;
 762         struct iwl_rx_queue *rxq = &priv->rxq;
 763         u32 r, i;
 764         int reclaim;
 765         unsigned long flags;
 766         u8 fill_rx = 0;
 767         u32 count = 8;
 768         int total_empty;
 769
 770         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 771          * buffer that the driver may process (last buffer filled by ucode). */
 772         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 773         i = rxq->read;
 774
 775         /* Rx interrupt, but nothing sent from uCode */
 776         if (i == r)
 777                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 778
 779         /* calculate total frames need to be restock after handling RX */
 780         total_empty = r - priv->rxq.write_actual;
 781         if (total_empty < 0)
 782                 total_empty += RX_QUEUE_SIZE;
 783
 784         if (total_empty > (RX_QUEUE_SIZE / 2))
 785                 fill_rx = 1;
 786
 787         while (i != r) {
 788                 rxb = rxq->queue[i];
 789
 790                 /* If an RXB doesn't have a Rx queue slot associated with it,
 791                  * then a bug has been introduced in the queue refilling
 792                  * routines -- catch it here */
 793                 BUG_ON(rxb == NULL);
 794
 795                 rxq->queue[i] = NULL;
 796
 797                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
 798                                  priv->hw_params.rx_buf_size + 256,
 799                                  PCI_DMA_FROMDEVICE);
 800                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 801
 802                 /* Reclaim a command buffer only if this packet is a response
 803                  *   to a (driver-originated) command.
 804                  * If the packet (e.g. Rx frame) originated from uCode,
 805                  *   there is no command buffer to reclaim.
 806                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 807                  *   but apparently a few don't get set; catch them here. */
 808                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 809                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 810                         (pkt->hdr.cmd != REPLY_RX) &&
 811                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 812                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 813                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 814                         (pkt->hdr.cmd != REPLY_TX);
 815
 816                 /* Based on type of command response or notification,
 817                  *   handle those that need handling via function in
 818                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 819                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 820                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 821                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 822                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 823                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 824                 } else {
 825                         /* No handling needed */
 826                         IWL_DEBUG_RX(priv,
 827                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 828                                 r, i, get_cmd_string(pkt->hdr.cmd),
 829                                 pkt->hdr.cmd);
 830                 }
 831
 832                 if (reclaim) {
 833                         /* Invoke any callbacks, transfer the skb to caller, and
 834                          * fire off the (possibly) blocking iwl_send_cmd()
 835                          * as we reclaim the driver command queue */
 836                         if (rxb && rxb->skb)
 837                                 iwl_tx_cmd_complete(priv, rxb);
 838                         else
 839                                 IWL_WARN(priv, "Claim null rxb?\n");
 840                 }
 841
 842                 /* For now we just don't re-use anything.  We can tweak this
 843                  * later to try and re-use notification packets and SKBs that
 844                  * fail to Rx correctly */
 845                 if (rxb->skb != NULL) {
 846                         priv->alloc_rxb_skb--;
 847                         dev_kfree_skb_any(rxb->skb);
 848                         rxb->skb = NULL;
 849                 }
 850
 851                 spin_lock_irqsave(&rxq->lock, flags);
 852                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
 853                 spin_unlock_irqrestore(&rxq->lock, flags);
 854                 i = (i + 1) & RX_QUEUE_MASK;
 855                 /* If there are a lot of unused frames,
 856                  * restock the Rx queue so ucode wont assert. */
 857                 if (fill_rx) {
 858                         count++;
 859                         if (count >= 8) {
 860                                 priv->rxq.read = i;
 861                                 iwl_rx_replenish_now(priv);
 862                                 count = 0;
 863                         }
 864                 }
 865         }
 866
 867         /* Backtrack one entry */
 868         priv->rxq.read = i;
 869         if (fill_rx)
 870                 iwl_rx_replenish_now(priv);
 871         else
 872                 iwl_rx_queue_restock(priv);
 873 }
 874
 875 /* call this function to flush any scheduled tasklet */
 876 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 877 {
 878         /* wait to make sure we flush pending tasklet*/
 879         synchronize_irq(priv->pci_dev->irq);
 880         tasklet_kill(&priv->irq_tasklet);
 881 }
 882
 883 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
 884 {
 885         u32 inta, handled = 0;
 886         u32 inta_fh;
 887         unsigned long flags;
 888 #ifdef CONFIG_IWLWIFI_DEBUG
 889         u32 inta_mask;
 890 #endif
 891
 892         spin_lock_irqsave(&priv->lock, flags);
 893
 894         /* Ack/clear/reset pending uCode interrupts.
 895          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 896          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
 897         inta = iwl_read32(priv, CSR_INT);
 898         iwl_write32(priv, CSR_INT, inta);
 899
 900         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
 901          * Any new interrupts that happen after this, either while we're
 902          * in this tasklet, or later, will show up in next ISR/tasklet. */
 903         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
 904         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
 905
 906 #ifdef CONFIG_IWLWIFI_DEBUG
 907         if (iwl_debug_level & IWL_DL_ISR) {
 908                 /* just for debug */
 909                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 910                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
 911                               inta, inta_mask, inta_fh);
 912         }
 913 #endif
 914
 915         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
 916          * atomic, make sure that inta covers all the interrupts that
 917          * we've discovered, even if FH interrupt came in just after
 918          * reading CSR_INT. */
 919         if (inta_fh & CSR49_FH_INT_RX_MASK)
 920                 inta |= CSR_INT_BIT_FH_RX;
 921         if (inta_fh & CSR49_FH_INT_TX_MASK)
 922                 inta |= CSR_INT_BIT_FH_TX;
 923
 924         /* Now service all interrupt bits discovered above. */
 925         if (inta & CSR_INT_BIT_HW_ERR) {
 926                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 927
 928                 /* Tell the device to stop sending interrupts */
 929                 iwl_disable_interrupts(priv);
 930
 931                 priv->isr_stats.hw++;
 932                 iwl_irq_handle_error(priv);
 933
 934                 handled |= CSR_INT_BIT_HW_ERR;
 935
 936                 spin_unlock_irqrestore(&priv->lock, flags);
 937
 938                 return;
 939         }
 940
 941 #ifdef CONFIG_IWLWIFI_DEBUG
 942         if (iwl_debug_level & (IWL_DL_ISR)) {
 943                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
 944                 if (inta & CSR_INT_BIT_SCD) {
 945                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
 946                                       "the frame/frames.\n");
 947                         priv->isr_stats.sch++;
 948                 }
 949
 950                 /* Alive notification via Rx interrupt will do the real work */
 951                 if (inta & CSR_INT_BIT_ALIVE) {
 952                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
 953                         priv->isr_stats.alive++;
 954                 }
 955         }
 956 #endif
 957         /* Safely ignore these bits for debug checks below */
 958         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
 959
 960         /* HW RF KILL switch toggled */
 961         if (inta & CSR_INT_BIT_RF_KILL) {
 962                 int hw_rf_kill = 0;
 963                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
 964                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
 965                         hw_rf_kill = 1;
 966
 967                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
 968                                 hw_rf_kill ? "disable radio" : "enable radio");
 969
 970                 priv->isr_stats.rfkill++;
 971
 972                 /* driver only loads ucode once setting the interface up.
 973                  * the driver allows loading the ucode even if the radio
 974                  * is killed. Hence update the killswitch state here. The
 975                  * rfkill handler will care about restarting if needed.
 976                  */
 977                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
 978                         if (hw_rf_kill)
 979                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 980                         else
 981                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 982                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
 983                 }
 984
 985                 handled |= CSR_INT_BIT_RF_KILL;
 986         }
 987
 988         /* Chip got too hot and stopped itself */
 989         if (inta & CSR_INT_BIT_CT_KILL) {
 990                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
 991                 priv->isr_stats.ctkill++;
 992                 handled |= CSR_INT_BIT_CT_KILL;
 993         }
 994
 995         /* Error detected by uCode */
 996         if (inta & CSR_INT_BIT_SW_ERR) {
 997                 IWL_ERR(priv, "Microcode SW error detected. "
 998                         " Restarting 0x%X.\n", inta);
 999                 priv->isr_stats.sw++;
1000                 priv->isr_stats.sw_err = inta;
1001                 iwl_irq_handle_error(priv);
1002                 handled |= CSR_INT_BIT_SW_ERR;
1003         }
1004
1005         /* uCode wakes up after power-down sleep */
1006         if (inta & CSR_INT_BIT_WAKEUP) {
1007                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1008                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1009                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1010                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1011                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1012                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1013                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1014                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1015
1016                 priv->isr_stats.wakeup++;
1017
1018                 handled |= CSR_INT_BIT_WAKEUP;
1019         }
1020
1021         /* All uCode command responses, including Tx command responses,
1022          * Rx "responses" (frame-received notification), and other
1023          * notifications from uCode come through here*/
1024         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1025                 iwl_rx_handle(priv);
1026                 priv->isr_stats.rx++;
1027                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1028         }
1029
1030         if (inta & CSR_INT_BIT_FH_TX) {
1031                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1032                 priv->isr_stats.tx++;
1033                 handled |= CSR_INT_BIT_FH_TX;
1034                 /* FH finished to write, send event */
1035                 priv->ucode_write_complete = 1;
1036                 wake_up_interruptible(&priv->wait_command_queue);
1037         }
1038
1039         if (inta & ~handled) {
1040                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1041                 priv->isr_stats.unhandled++;
1042         }
1043
1044         if (inta & ~(priv->inta_mask)) {
1045                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1046                          inta & ~priv->inta_mask);
1047                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1048         }
1049
1050         /* Re-enable all interrupts */
1051         /* only Re-enable if diabled by irq */
1052         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1053                 iwl_enable_interrupts(priv);
1054
1055 #ifdef CONFIG_IWLWIFI_DEBUG
1056         if (iwl_debug_level & (IWL_DL_ISR)) {
1057                 inta = iwl_read32(priv, CSR_INT);
1058                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1059                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1060                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1061                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1062         }
1063 #endif
1064         spin_unlock_irqrestore(&priv->lock, flags);
1065 }
1066
1067 /* tasklet for iwlagn interrupt */
1068 static void iwl_irq_tasklet(struct iwl_priv *priv)
1069 {
1070         u32 inta = 0;
1071         u32 handled = 0;
1072         unsigned long flags;
1073 #ifdef CONFIG_IWLWIFI_DEBUG
1074         u32 inta_mask;
1075 #endif
1076
1077         spin_lock_irqsave(&priv->lock, flags);
1078
1079         /* Ack/clear/reset pending uCode interrupts.
1080          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1081          */
1082         iwl_write32(priv, CSR_INT, priv->inta);
1083
1084         inta = priv->inta;
1085
1086 #ifdef CONFIG_IWLWIFI_DEBUG
1087         if (iwl_debug_level & IWL_DL_ISR) {
1088                 /* just for debug */
1089                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1090                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1091                                 inta, inta_mask);
1092         }
1093 #endif
1094         /* saved interrupt in inta variable now we can reset priv->inta */
1095         priv->inta = 0;
1096
1097         /* Now service all interrupt bits discovered above. */
1098         if (inta & CSR_INT_BIT_HW_ERR) {
1099                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1100
1101                 /* Tell the device to stop sending interrupts */
1102                 iwl_disable_interrupts(priv);
1103
1104                 priv->isr_stats.hw++;
1105                 iwl_irq_handle_error(priv);
1106
1107                 handled |= CSR_INT_BIT_HW_ERR;
1108
1109                 spin_unlock_irqrestore(&priv->lock, flags);
1110
1111                 return;
1112         }
1113
1114 #ifdef CONFIG_IWLWIFI_DEBUG
1115         if (iwl_debug_level & (IWL_DL_ISR)) {
1116                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1117                 if (inta & CSR_INT_BIT_SCD) {
1118                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1119                                       "the frame/frames.\n");
1120                         priv->isr_stats.sch++;
1121                 }
1122
1123                 /* Alive notification via Rx interrupt will do the real work */
1124                 if (inta & CSR_INT_BIT_ALIVE) {
1125                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1126                         priv->isr_stats.alive++;
1127                 }
1128         }
1129 #endif
1130         /* Safely ignore these bits for debug checks below */
1131         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1132
1133         /* HW RF KILL switch toggled */
1134         if (inta & CSR_INT_BIT_RF_KILL) {
1135                 int hw_rf_kill = 0;
1136                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1137                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1138                         hw_rf_kill = 1;
1139
1140                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1141                                 hw_rf_kill ? "disable radio" : "enable radio");
1142
1143                 priv->isr_stats.rfkill++;
1144
1145                 /* driver only loads ucode once setting the interface up.
1146                  * the driver allows loading the ucode even if the radio
1147                  * is killed. Hence update the killswitch state here. The
1148                  * rfkill handler will care about restarting if needed.
1149                  */
1150                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1151                         if (hw_rf_kill)
1152                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1153                         else
1154                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1155                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1156                 }
1157
1158                 handled |= CSR_INT_BIT_RF_KILL;
1159         }
1160
1161         /* Chip got too hot and stopped itself */
1162         if (inta & CSR_INT_BIT_CT_KILL) {
1163                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1164                 priv->isr_stats.ctkill++;
1165                 handled |= CSR_INT_BIT_CT_KILL;
1166         }
1167
1168         /* Error detected by uCode */
1169         if (inta & CSR_INT_BIT_SW_ERR) {
1170                 IWL_ERR(priv, "Microcode SW error detected. "
1171                         " Restarting 0x%X.\n", inta);
1172                 priv->isr_stats.sw++;
1173                 priv->isr_stats.sw_err = inta;
1174                 iwl_irq_handle_error(priv);
1175                 handled |= CSR_INT_BIT_SW_ERR;
1176         }
1177
1178         /* uCode wakes up after power-down sleep */
1179         if (inta & CSR_INT_BIT_WAKEUP) {
1180                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1181                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1182                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1183                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1184                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1185                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1186                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1187                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1188
1189                 priv->isr_stats.wakeup++;
1190
1191                 handled |= CSR_INT_BIT_WAKEUP;
1192         }
1193
1194         /* All uCode command responses, including Tx command responses,
1195          * Rx "responses" (frame-received notification), and other
1196          * notifications from uCode come through here*/
1197         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1198                         CSR_INT_BIT_RX_PERIODIC)) {
1199                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1200                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1201                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1202                         iwl_write32(priv, CSR_FH_INT_STATUS,
1203                                         CSR49_FH_INT_RX_MASK);
1204                 }
1205                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1206                         handled |= CSR_INT_BIT_RX_PERIODIC;
1207                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1208                 }
1209                 /* Sending RX interrupt require many steps to be done in the
1210                  * the device:
1211                  * 1- write interrupt to current index in ICT table.
1212                  * 2- dma RX frame.
1213                  * 3- update RX shared data to indicate last write index.
1214                  * 4- send interrupt.
1215                  * This could lead to RX race, driver could receive RX interrupt
1216                  * but the shared data changes does not reflect this.
1217                  * this could lead to RX race, RX periodic will solve this race
1218                  */
1219                 iwl_write32(priv, CSR_INT_PERIODIC_REG,
1220                             CSR_INT_PERIODIC_DIS);
1221                 iwl_rx_handle(priv);
1222                 /* Only set RX periodic if real RX is received. */
1223                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1224                         iwl_write32(priv, CSR_INT_PERIODIC_REG,
1225                                     CSR_INT_PERIODIC_ENA);
1226
1227                 priv->isr_stats.rx++;
1228         }
1229
1230         if (inta & CSR_INT_BIT_FH_TX) {
1231                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1232                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1233                 priv->isr_stats.tx++;
1234                 handled |= CSR_INT_BIT_FH_TX;
1235                 /* FH finished to write, send event */
1236                 priv->ucode_write_complete = 1;
1237                 wake_up_interruptible(&priv->wait_command_queue);
1238         }
1239
1240         if (inta & ~handled) {
1241                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1242                 priv->isr_stats.unhandled++;
1243         }
1244
1245         if (inta & ~(priv->inta_mask)) {
1246                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1247                          inta & ~priv->inta_mask);
1248         }
1249
1250
1251         /* Re-enable all interrupts */
1252         /* only Re-enable if diabled by irq */
1253         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1254                 iwl_enable_interrupts(priv);
1255
1256         spin_unlock_irqrestore(&priv->lock, flags);
1257
1258 }
1259
1260
1261 /******************************************************************************
1262  *
1263  * uCode download functions
1264  *
1265  ******************************************************************************/
1266
1267 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1268 {
1269         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1270         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1271         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1272         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1273         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1274         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1275 }
1276
1277 static void iwl_nic_start(struct iwl_priv *priv)
1278 {
1279         /* Remove all resets to allow NIC to operate */
1280         iwl_write32(priv, CSR_RESET, 0);
1281 }
1282
1283
1284 /**
1285  * iwl_read_ucode - Read uCode images from disk file.
1286  *
1287  * Copy into buffers for card to fetch via bus-mastering
1288  */
1289 static int iwl_read_ucode(struct iwl_priv *priv)
1290 {
1291         struct iwl_ucode_header *ucode;
1292         int ret = -EINVAL, index;
1293         const struct firmware *ucode_raw;
1294         const char *name_pre = priv->cfg->fw_name_pre;
1295         const unsigned int api_max = priv->cfg->ucode_api_max;
1296         const unsigned int api_min = priv->cfg->ucode_api_min;
1297         char buf[25];
1298         u8 *src;
1299         size_t len;
1300         u32 api_ver, build;
1301         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1302
1303         /* Ask kernel firmware_class module to get the boot firmware off disk.
1304          * request_firmware() is synchronous, file is in memory on return. */
1305         for (index = api_max; index >= api_min; index--) {
1306                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1307                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1308                 if (ret < 0) {
1309                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1310                                   buf, ret);
1311                         if (ret == -ENOENT)
1312                                 continue;
1313                         else
1314                                 goto error;
1315                 } else {
1316                         if (index < api_max)
1317                                 IWL_ERR(priv, "Loaded firmware %s, "
1318                                         "which is deprecated. "
1319                                         "Please use API v%u instead.\n",
1320                                           buf, api_max);
1321
1322                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1323                                        buf, ucode_raw->size);
1324                         break;
1325                 }
1326         }
1327
1328         if (ret < 0)
1329                 goto error;
1330
1331         /* Make sure that we got at least the v1 header! */
1332         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1333                 IWL_ERR(priv, "File size way too small!\n");
1334                 ret = -EINVAL;
1335                 goto err_release;
1336         }
1337
1338         /* Data from ucode file:  header followed by uCode images */
1339         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1340
1341         priv->ucode_ver = le32_to_cpu(ucode->ver);
1342         api_ver = IWL_UCODE_API(priv->ucode_ver);
1343         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1344         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1345         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1346         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1347         init_data_size =
1348                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1349         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1350         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1351
1352         /* api_ver should match the api version forming part of the
1353          * firmware filename ... but we don't check for that and only rely
1354          * on the API version read from firmware header from here on forward */
1355
1356         if (api_ver < api_min || api_ver > api_max) {
1357                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1358                           "Driver supports v%u, firmware is v%u.\n",
1359                           api_max, api_ver);
1360                 priv->ucode_ver = 0;
1361                 ret = -EINVAL;
1362                 goto err_release;
1363         }
1364         if (api_ver != api_max)
1365                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1366                           "got v%u. New firmware can be obtained "
1367                           "from http://www.intellinuxwireless.org.\n",
1368                           api_max, api_ver);
1369
1370         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1371                IWL_UCODE_MAJOR(priv->ucode_ver),
1372                IWL_UCODE_MINOR(priv->ucode_ver),
1373                IWL_UCODE_API(priv->ucode_ver),
1374                IWL_UCODE_SERIAL(priv->ucode_ver));
1375
1376         if (build)
1377                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1378
1379         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1380                        priv->ucode_ver);
1381         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1382                        inst_size);
1383         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1384                        data_size);
1385         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1386                        init_size);
1387         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1388                        init_data_size);
1389         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1390                        boot_size);
1391
1392         /* Verify size of file vs. image size info in file's header */
1393         if (ucode_raw->size !=
1394                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1395                 inst_size + data_size + init_size +
1396                 init_data_size + boot_size) {
1397
1398                 IWL_DEBUG_INFO(priv,
1399                         "uCode file size %d does not match expected size\n",
1400                         (int)ucode_raw->size);
1401                 ret = -EINVAL;
1402                 goto err_release;
1403         }
1404
1405         /* Verify that uCode images will fit in card's SRAM */
1406         if (inst_size > priv->hw_params.max_inst_size) {
1407                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1408                                inst_size);
1409                 ret = -EINVAL;
1410                 goto err_release;
1411         }
1412
1413         if (data_size > priv->hw_params.max_data_size) {
1414                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1415                                 data_size);
1416                 ret = -EINVAL;
1417                 goto err_release;
1418         }
1419         if (init_size > priv->hw_params.max_inst_size) {
1420                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1421                         init_size);
1422                 ret = -EINVAL;
1423                 goto err_release;
1424         }
1425         if (init_data_size > priv->hw_params.max_data_size) {
1426                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1427                       init_data_size);
1428                 ret = -EINVAL;
1429                 goto err_release;
1430         }
1431         if (boot_size > priv->hw_params.max_bsm_size) {
1432                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1433                         boot_size);
1434                 ret = -EINVAL;
1435                 goto err_release;
1436         }
1437
1438         /* Allocate ucode buffers for card's bus-master loading ... */
1439
1440         /* Runtime instructions and 2 copies of data:
1441          * 1) unmodified from disk
1442          * 2) backup cache for save/restore during power-downs */
1443         priv->ucode_code.len = inst_size;
1444         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1445
1446         priv->ucode_data.len = data_size;
1447         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1448
1449         priv->ucode_data_backup.len = data_size;
1450         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1451
1452         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1453             !priv->ucode_data_backup.v_addr)
1454                 goto err_pci_alloc;
1455
1456         /* Initialization instructions and data */
1457         if (init_size && init_data_size) {
1458                 priv->ucode_init.len = init_size;
1459                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1460
1461                 priv->ucode_init_data.len = init_data_size;
1462                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1463
1464                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1465                         goto err_pci_alloc;
1466         }
1467
1468         /* Bootstrap (instructions only, no data) */
1469         if (boot_size) {
1470                 priv->ucode_boot.len = boot_size;
1471                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1472
1473                 if (!priv->ucode_boot.v_addr)
1474                         goto err_pci_alloc;
1475         }
1476
1477         /* Copy images into buffers for card's bus-master reads ... */
1478
1479         /* Runtime instructions (first block of data in file) */
1480         len = inst_size;
1481         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1482         memcpy(priv->ucode_code.v_addr, src, len);
1483         src += len;
1484
1485         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1486                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1487
1488         /* Runtime data (2nd block)
1489          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1490         len = data_size;
1491         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1492         memcpy(priv->ucode_data.v_addr, src, len);
1493         memcpy(priv->ucode_data_backup.v_addr, src, len);
1494         src += len;
1495
1496         /* Initialization instructions (3rd block) */
1497         if (init_size) {
1498                 len = init_size;
1499                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1500                                 len);
1501                 memcpy(priv->ucode_init.v_addr, src, len);
1502                 src += len;
1503         }
1504
1505         /* Initialization data (4th block) */
1506         if (init_data_size) {
1507                 len = init_data_size;
1508                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1509                                len);
1510                 memcpy(priv->ucode_init_data.v_addr, src, len);
1511                 src += len;
1512         }
1513
1514         /* Bootstrap instructions (5th block) */
1515         len = boot_size;
1516         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1517         memcpy(priv->ucode_boot.v_addr, src, len);
1518
1519         /* We have our copies now, allow OS release its copies */
1520         release_firmware(ucode_raw);
1521         return 0;
1522
1523  err_pci_alloc:
1524         IWL_ERR(priv, "failed to allocate pci memory\n");
1525         ret = -ENOMEM;
1526         iwl_dealloc_ucode_pci(priv);
1527
1528  err_release:
1529         release_firmware(ucode_raw);
1530
1531  error:
1532         return ret;
1533 }
1534
1535 /**
1536  * iwl_alive_start - called after REPLY_ALIVE notification received
1537  *                   from protocol/runtime uCode (initialization uCode's
1538  *                   Alive gets handled by iwl_init_alive_start()).
1539  */
1540 static void iwl_alive_start(struct iwl_priv *priv)
1541 {
1542         int ret = 0;
1543
1544         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1545
1546         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1547                 /* We had an error bringing up the hardware, so take it
1548                  * all the way back down so we can try again */
1549                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1550                 goto restart;
1551         }
1552
1553         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1554          * This is a paranoid check, because we would not have gotten the
1555          * "runtime" alive if code weren't properly loaded.  */
1556         if (iwl_verify_ucode(priv)) {
1557                 /* Runtime instruction load was bad;
1558                  * take it all the way back down so we can try again */
1559                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1560                 goto restart;
1561         }
1562
1563         iwl_clear_stations_table(priv);
1564         ret = priv->cfg->ops->lib->alive_notify(priv);
1565         if (ret) {
1566                 IWL_WARN(priv,
1567                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1568                 goto restart;
1569         }
1570
1571         /* After the ALIVE response, we can send host commands to the uCode */
1572         set_bit(STATUS_ALIVE, &priv->status);
1573
1574         if (iwl_is_rfkill(priv))
1575                 return;
1576
1577         ieee80211_wake_queues(priv->hw);
1578
1579         priv->active_rate = priv->rates_mask;
1580         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1581
1582         if (iwl_is_associated(priv)) {
1583                 struct iwl_rxon_cmd *active_rxon =
1584                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1585                 /* apply any changes in staging */
1586                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1587                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1588         } else {
1589                 /* Initialize our rx_config data */
1590                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1591
1592                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1593                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1594
1595                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1596         }
1597
1598         /* Configure Bluetooth device coexistence support */
1599         iwl_send_bt_config(priv);
1600
1601         iwl_reset_run_time_calib(priv);
1602
1603         /* Configure the adapter for unassociated operation */
1604         iwlcore_commit_rxon(priv);
1605
1606         /* At this point, the NIC is initialized and operational */
1607         iwl_rf_kill_ct_config(priv);
1608
1609         iwl_leds_register(priv);
1610
1611         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1612         set_bit(STATUS_READY, &priv->status);
1613         wake_up_interruptible(&priv->wait_command_queue);
1614
1615         iwl_power_update_mode(priv, 1);
1616
1617         /* reassociate for ADHOC mode */
1618         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1619                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1620                                                                 priv->vif);
1621                 if (beacon)
1622                         iwl_mac_beacon_update(priv->hw, beacon);
1623         }
1624
1625
1626         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1627                 iwl_set_mode(priv, priv->iw_mode);
1628
1629         return;
1630
1631  restart:
1632         queue_work(priv->workqueue, &priv->restart);
1633 }
1634
1635 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1636
1637 static void __iwl_down(struct iwl_priv *priv)
1638 {
1639         unsigned long flags;
1640         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1641
1642         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1643
1644         if (!exit_pending)
1645                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1646
1647         iwl_leds_unregister(priv);
1648
1649         iwl_clear_stations_table(priv);
1650
1651         /* Unblock any waiting calls */
1652         wake_up_interruptible_all(&priv->wait_command_queue);
1653
1654         /* Wipe out the EXIT_PENDING status bit if we are not actually
1655          * exiting the module */
1656         if (!exit_pending)
1657                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1658
1659         /* stop and reset the on-board processor */
1660         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1661
1662         /* tell the device to stop sending interrupts */
1663         spin_lock_irqsave(&priv->lock, flags);
1664         iwl_disable_interrupts(priv);
1665         spin_unlock_irqrestore(&priv->lock, flags);
1666         iwl_synchronize_irq(priv);
1667
1668         if (priv->mac80211_registered)
1669                 ieee80211_stop_queues(priv->hw);
1670
1671         /* If we have not previously called iwl_init() then
1672          * clear all bits but the RF Kill bit and return */
1673         if (!iwl_is_init(priv)) {
1674                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1675                                         STATUS_RF_KILL_HW |
1676                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1677                                         STATUS_GEO_CONFIGURED |
1678                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1679                                         STATUS_EXIT_PENDING;
1680                 goto exit;
1681         }
1682
1683         /* ...otherwise clear out all the status bits but the RF Kill
1684          * bit and continue taking the NIC down. */
1685         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1686                                 STATUS_RF_KILL_HW |
1687                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1688                                 STATUS_GEO_CONFIGURED |
1689                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1690                                 STATUS_FW_ERROR |
1691                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1692                                 STATUS_EXIT_PENDING;
1693
1694         /* device going down, Stop using ICT table */
1695         iwl_disable_ict(priv);
1696         spin_lock_irqsave(&priv->lock, flags);
1697         iwl_clear_bit(priv, CSR_GP_CNTRL,
1698                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1699         spin_unlock_irqrestore(&priv->lock, flags);
1700
1701         iwl_txq_ctx_stop(priv);
1702         iwl_rxq_stop(priv);
1703
1704         iwl_write_prph(priv, APMG_CLK_DIS_REG,
1705                                 APMG_CLK_VAL_DMA_CLK_RQT);
1706
1707         udelay(5);
1708
1709         /* FIXME: apm_ops.suspend(priv) */
1710         if (exit_pending)
1711                 priv->cfg->ops->lib->apm_ops.stop(priv);
1712         else
1713                 priv->cfg->ops->lib->apm_ops.reset(priv);
1714  exit:
1715         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1716
1717         if (priv->ibss_beacon)
1718                 dev_kfree_skb(priv->ibss_beacon);
1719         priv->ibss_beacon = NULL;
1720
1721         /* clear out any free frames */
1722         iwl_clear_free_frames(priv);
1723 }
1724
1725 static void iwl_down(struct iwl_priv *priv)
1726 {
1727         mutex_lock(&priv->mutex);
1728         __iwl_down(priv);
1729         mutex_unlock(&priv->mutex);
1730
1731         iwl_cancel_deferred_work(priv);
1732 }
1733
1734 #define HW_READY_TIMEOUT (50)
1735
1736 static int iwl_set_hw_ready(struct iwl_priv *priv)
1737 {
1738         int ret = 0;
1739
1740         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1741                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
1742
1743         /* See if we got it */
1744         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1745                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1746                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1747                                 HW_READY_TIMEOUT);
1748         if (ret != -ETIMEDOUT)
1749                 priv->hw_ready = true;
1750         else
1751                 priv->hw_ready = false;
1752
1753         IWL_DEBUG_INFO(priv, "hardware %s\n",
1754                       (priv->hw_ready == 1) ? "ready" : "not ready");
1755         return ret;
1756 }
1757
1758 static int iwl_prepare_card_hw(struct iwl_priv *priv)
1759 {
1760         int ret = 0;
1761
1762         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
1763
1764         ret = iwl_set_hw_ready(priv);
1765         if (priv->hw_ready)
1766                 return ret;
1767
1768         /* If HW is not ready, prepare the conditions to check again */
1769         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1770                         CSR_HW_IF_CONFIG_REG_PREPARE);
1771
1772         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1773                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
1774                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
1775
1776         /* HW should be ready by now, check again. */
1777         if (ret != -ETIMEDOUT)
1778                 iwl_set_hw_ready(priv);
1779
1780         return ret;
1781 }
1782
1783 #define MAX_HW_RESTARTS 5
1784
1785 static int __iwl_up(struct iwl_priv *priv)
1786 {
1787         int i;
1788         int ret;
1789         unsigned long status;
1790
1791         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1792                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1793                 return -EIO;
1794         }
1795
1796         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1797                 IWL_ERR(priv, "ucode not available for device bringup\n");
1798                 return -EIO;
1799         }
1800
1801         iwl_prepare_card_hw(priv);
1802
1803         if (!priv->hw_ready) {
1804                 IWL_WARN(priv, "Exit HW not ready\n");
1805                 return -EIO;
1806         }
1807
1808         /* If platform's RF_KILL switch is NOT set to KILL */
1809         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1810                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1811         else
1812                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1813
1814         if (iwl_is_rfkill(priv)) {
1815                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
1816
1817                 iwl_enable_interrupts(priv);
1818                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
1819                 return 0;
1820         }
1821
1822         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1823
1824         ret = iwl_hw_nic_init(priv);
1825         if (ret) {
1826                 IWL_ERR(priv, "Unable to init nic\n");
1827                 return ret;
1828         }
1829
1830         /* make sure rfkill handshake bits are cleared */
1831         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1832         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1833                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1834
1835         /* clear (again), then enable host interrupts */
1836         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1837         iwl_enable_interrupts(priv);
1838
1839         /* really make sure rfkill handshake bits are cleared */
1840         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1841         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1842
1843         /* Copy original ucode data image from disk into backup cache.
1844          * This will be used to initialize the on-board processor's
1845          * data SRAM for a clean start when the runtime program first loads. */
1846         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1847                priv->ucode_data.len);
1848
1849         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1850
1851                 iwl_clear_stations_table(priv);
1852
1853                 /* load bootstrap state machine,
1854                  * load bootstrap program into processor's memory,
1855                  * prepare to load the "initialize" uCode */
1856                 ret = priv->cfg->ops->lib->load_ucode(priv);
1857
1858                 if (ret) {
1859                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1860                                 ret);
1861                         continue;
1862                 }
1863
1864                 /* start card; "initialize" will load runtime ucode */
1865                 iwl_nic_start(priv);
1866
1867                 /* Just finish download Init or Runtime uCode image to device
1868                  * now we wait here for uCode send REPLY_ALIVE notification
1869                  * to indicate uCode is ready.
1870                  * 1) For Init uCode image, all iwlagn devices should wait here
1871                  * on STATUS_INIT_UCODE_ALIVE status bit; if timeout before
1872                  * receive the REPLY_ALIVE notification, go back and try to
1873                  * download the Init uCode image again.
1874                  * 2) For Runtime uCode image, all iwlagn devices except 4965
1875                  * wait here on STATUS_RT_UCODE_ALIVE status bit; if
1876                  * timeout before receive the REPLY_ALIVE notification, go back
1877                  * and download the Runtime uCode image again.
1878                  * 3) For 4965 Runtime uCode, it will not go through this path,
1879                  * need to wait for STATUS_RT_UCODE_ALIVE status bit in
1880                  * iwl4965_init_alive_start() function; if timeout, need to
1881                  * restart and download Init uCode image.
1882                  */
1883                 if (priv->ucode_type == UCODE_INIT)
1884                         status = STATUS_INIT_UCODE_ALIVE;
1885                 else
1886                         status = STATUS_RT_UCODE_ALIVE;
1887                 if (test_bit(status, &priv->status)) {
1888                         IWL_WARN(priv,
1889                                 "%s uCode already alive? "
1890                                 "Waiting for alive anyway\n",
1891                                 (status == STATUS_INIT_UCODE_ALIVE)
1892                                 ? "INIT" : "Runtime");
1893                         clear_bit(status, &priv->status);
1894                 }
1895                 ret = wait_event_interruptible_timeout(
1896                                 priv->wait_command_queue,
1897                                 test_bit(status, &priv->status),
1898                                 UCODE_ALIVE_TIMEOUT);
1899                 if (!ret) {
1900                         if (!test_bit(status, &priv->status)) {
1901                                 priv->ucode_type =
1902                                         (status == STATUS_INIT_UCODE_ALIVE)
1903                                         ? UCODE_NONE : UCODE_INIT;
1904                                 IWL_ERR(priv,
1905                                         "%s timeout after %dms\n",
1906                                         (status == STATUS_INIT_UCODE_ALIVE)
1907                                         ? "INIT" : "Runtime",
1908                                         jiffies_to_msecs(UCODE_ALIVE_TIMEOUT));
1909                                 continue;
1910                         }
1911                 }
1912                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1913
1914                 return 0;
1915         }
1916
1917         set_bit(STATUS_EXIT_PENDING, &priv->status);
1918         __iwl_down(priv);
1919         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1920
1921         /* tried to restart and config the device for as long as our
1922          * patience could withstand */
1923         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1924         return -EIO;
1925 }
1926
1927
1928 /*****************************************************************************
1929  *
1930  * Workqueue callbacks
1931  *
1932  *****************************************************************************/
1933
1934 static void iwl_bg_init_alive_start(struct work_struct *data)
1935 {
1936         struct iwl_priv *priv =
1937             container_of(data, struct iwl_priv, init_alive_start.work);
1938
1939         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1940                 return;
1941
1942         mutex_lock(&priv->mutex);
1943         priv->cfg->ops->lib->init_alive_start(priv);
1944         mutex_unlock(&priv->mutex);
1945 }
1946
1947 static void iwl_bg_alive_start(struct work_struct *data)
1948 {
1949         struct iwl_priv *priv =
1950             container_of(data, struct iwl_priv, alive_start.work);
1951
1952         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1953                 return;
1954
1955         /* enable dram interrupt */
1956         iwl_reset_ict(priv);
1957
1958         mutex_lock(&priv->mutex);
1959         iwl_alive_start(priv);
1960         mutex_unlock(&priv->mutex);
1961 }
1962
1963 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1964 {
1965         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1966                         run_time_calib_work);
1967
1968         mutex_lock(&priv->mutex);
1969
1970         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1971             test_bit(STATUS_SCANNING, &priv->status)) {
1972                 mutex_unlock(&priv->mutex);
1973                 return;
1974         }
1975
1976         if (priv->start_calib) {
1977                 iwl_chain_noise_calibration(priv, &priv->statistics);
1978
1979                 iwl_sensitivity_calibration(priv, &priv->statistics);
1980         }
1981
1982         mutex_unlock(&priv->mutex);
1983         return;
1984 }
1985
1986 static void iwl_bg_up(struct work_struct *data)
1987 {
1988         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1989
1990         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1991                 return;
1992
1993         mutex_lock(&priv->mutex);
1994         __iwl_up(priv);
1995         mutex_unlock(&priv->mutex);
1996 }
1997
1998 static void iwl_bg_restart(struct work_struct *data)
1999 {
2000         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2001
2002         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2003                 return;
2004
2005         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2006                 mutex_lock(&priv->mutex);
2007                 priv->vif = NULL;
2008                 priv->is_open = 0;
2009                 mutex_unlock(&priv->mutex);
2010                 iwl_down(priv);
2011                 ieee80211_restart_hw(priv->hw);
2012         } else {
2013                 iwl_down(priv);
2014                 queue_work(priv->workqueue, &priv->up);
2015         }
2016 }
2017
2018 static void iwl_bg_rx_replenish(struct work_struct *data)
2019 {
2020         struct iwl_priv *priv =
2021             container_of(data, struct iwl_priv, rx_replenish);
2022
2023         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2024                 return;
2025
2026         mutex_lock(&priv->mutex);
2027         iwl_rx_replenish(priv);
2028         mutex_unlock(&priv->mutex);
2029 }
2030
2031 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2032
2033 void iwl_post_associate(struct iwl_priv *priv)
2034 {
2035         struct ieee80211_conf *conf = NULL;
2036         int ret = 0;
2037         unsigned long flags;
2038
2039         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2040                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2041                 return;
2042         }
2043
2044         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2045                         priv->assoc_id, priv->active_rxon.bssid_addr);
2046
2047
2048         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2049                 return;
2050
2051
2052         if (!priv->vif || !priv->is_open)
2053                 return;
2054
2055         iwl_scan_cancel_timeout(priv, 200);
2056
2057         conf = ieee80211_get_hw_conf(priv->hw);
2058
2059         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2060         iwlcore_commit_rxon(priv);
2061
2062         iwl_setup_rxon_timing(priv);
2063         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2064                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2065         if (ret)
2066                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2067                             "Attempting to continue.\n");
2068
2069         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2070
2071         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2072
2073         if (priv->cfg->ops->hcmd->set_rxon_chain)
2074                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2075
2076         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2077
2078         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2079                         priv->assoc_id, priv->beacon_int);
2080
2081         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2082                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2083         else
2084                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2085
2086         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2087                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2088                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2089                 else
2090                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2091
2092                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2093                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2094
2095         }
2096
2097         iwlcore_commit_rxon(priv);
2098
2099         switch (priv->iw_mode) {
2100         case NL80211_IFTYPE_STATION:
2101                 break;
2102
2103         case NL80211_IFTYPE_ADHOC:
2104
2105                 /* assume default assoc id */
2106                 priv->assoc_id = 1;
2107
2108                 iwl_rxon_add_station(priv, priv->bssid, 0);
2109                 iwl_send_beacon_cmd(priv);
2110
2111                 break;
2112
2113         default:
2114                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2115                           __func__, priv->iw_mode);
2116                 break;
2117         }
2118
2119         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2120                 priv->assoc_station_added = 1;
2121
2122         spin_lock_irqsave(&priv->lock, flags);
2123         iwl_activate_qos(priv, 0);
2124         spin_unlock_irqrestore(&priv->lock, flags);
2125
2126         /* the chain noise calibration will enabled PM upon completion
2127          * If chain noise has already been run, then we need to enable
2128          * power management here */
2129         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2130                 iwl_power_update_mode(priv, 0);
2131
2132         /* Enable Rx differential gain and sensitivity calibrations */
2133         iwl_chain_noise_reset(priv);
2134         priv->start_calib = 1;
2135
2136 }
2137
2138 /*****************************************************************************
2139  *
2140  * mac80211 entry point functions
2141  *
2142  *****************************************************************************/
2143
2144 #define UCODE_READY_TIMEOUT     (4 * HZ)
2145
2146 static int iwl_mac_start(struct ieee80211_hw *hw)
2147 {
2148         struct iwl_priv *priv = hw->priv;
2149         int ret;
2150
2151         IWL_DEBUG_MAC80211(priv, "enter\n");
2152
2153         /* we should be verifying the device is ready to be opened */
2154         mutex_lock(&priv->mutex);
2155
2156         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2157          * ucode filename and max sizes are card-specific. */
2158
2159         if (!priv->ucode_code.len) {
2160                 ret = iwl_read_ucode(priv);
2161                 if (ret) {
2162                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2163                         mutex_unlock(&priv->mutex);
2164                         return ret;
2165                 }
2166         }
2167
2168         ret = __iwl_up(priv);
2169
2170         mutex_unlock(&priv->mutex);
2171
2172         if (ret)
2173                 return ret;
2174
2175         if (iwl_is_rfkill(priv))
2176                 goto out;
2177
2178         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2179
2180         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2181          * mac80211 will not be run successfully. */
2182         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2183                         test_bit(STATUS_READY, &priv->status),
2184                         UCODE_READY_TIMEOUT);
2185         if (!ret) {
2186                 if (!test_bit(STATUS_READY, &priv->status)) {
2187                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2188                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2189                         return -ETIMEDOUT;
2190                 }
2191         }
2192
2193 out:
2194         priv->is_open = 1;
2195         IWL_DEBUG_MAC80211(priv, "leave\n");
2196         return 0;
2197 }
2198
2199 static void iwl_mac_stop(struct ieee80211_hw *hw)
2200 {
2201         struct iwl_priv *priv = hw->priv;
2202
2203         IWL_DEBUG_MAC80211(priv, "enter\n");
2204
2205         if (!priv->is_open)
2206                 return;
2207
2208         priv->is_open = 0;
2209
2210         if (iwl_is_ready_rf(priv)) {
2211                 /* stop mac, cancel any scan request and clear
2212                  * RXON_FILTER_ASSOC_MSK BIT
2213                  */
2214                 mutex_lock(&priv->mutex);
2215                 iwl_scan_cancel_timeout(priv, 100);
2216                 mutex_unlock(&priv->mutex);
2217         }
2218
2219         iwl_down(priv);
2220
2221         flush_workqueue(priv->workqueue);
2222
2223         /* enable interrupts again in order to receive rfkill changes */
2224         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2225         iwl_enable_interrupts(priv);
2226
2227         IWL_DEBUG_MAC80211(priv, "leave\n");
2228 }
2229
2230 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2231 {
2232         struct iwl_priv *priv = hw->priv;
2233
2234         IWL_DEBUG_MACDUMP(priv, "enter\n");
2235
2236         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2237                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2238
2239         if (iwl_tx_skb(priv, skb))
2240                 dev_kfree_skb_any(skb);
2241
2242         IWL_DEBUG_MACDUMP(priv, "leave\n");
2243         return NETDEV_TX_OK;
2244 }
2245
2246 void iwl_config_ap(struct iwl_priv *priv)
2247 {
2248         int ret = 0;
2249         unsigned long flags;
2250
2251         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2252                 return;
2253
2254         /* The following should be done only at AP bring up */
2255         if (!iwl_is_associated(priv)) {
2256
2257                 /* RXON - unassoc (to set timing command) */
2258                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2259                 iwlcore_commit_rxon(priv);
2260
2261                 /* RXON Timing */
2262                 iwl_setup_rxon_timing(priv);
2263                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2264                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2265                 if (ret)
2266                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2267                                         "Attempting to continue.\n");
2268
2269                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2270                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2271
2272                 /* FIXME: what should be the assoc_id for AP? */
2273                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2274                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2275                         priv->staging_rxon.flags |=
2276                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2277                 else
2278                         priv->staging_rxon.flags &=
2279                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2280
2281                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2282                         if (priv->assoc_capability &
2283                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2284                                 priv->staging_rxon.flags |=
2285                                         RXON_FLG_SHORT_SLOT_MSK;
2286                         else
2287                                 priv->staging_rxon.flags &=
2288                                         ~RXON_FLG_SHORT_SLOT_MSK;
2289
2290                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2291                                 priv->staging_rxon.flags &=
2292                                         ~RXON_FLG_SHORT_SLOT_MSK;
2293                 }
2294                 /* restore RXON assoc */
2295                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2296                 iwlcore_commit_rxon(priv);
2297                 spin_lock_irqsave(&priv->lock, flags);
2298                 iwl_activate_qos(priv, 1);
2299                 spin_unlock_irqrestore(&priv->lock, flags);
2300                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2301         }
2302         iwl_send_beacon_cmd(priv);
2303
2304         /* FIXME - we need to add code here to detect a totally new
2305          * configuration, reset the AP, unassoc, rxon timing, assoc,
2306          * clear sta table, add BCAST sta... */
2307 }
2308
2309 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2310                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2311                         u32 iv32, u16 *phase1key)
2312 {
2313
2314         struct iwl_priv *priv = hw->priv;
2315         IWL_DEBUG_MAC80211(priv, "enter\n");
2316
2317         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2318
2319         IWL_DEBUG_MAC80211(priv, "leave\n");
2320 }
2321
2322 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2323                            struct ieee80211_vif *vif,
2324                            struct ieee80211_sta *sta,
2325                            struct ieee80211_key_conf *key)
2326 {
2327         struct iwl_priv *priv = hw->priv;
2328         const u8 *addr;
2329         int ret;
2330         u8 sta_id;
2331         bool is_default_wep_key = false;
2332
2333         IWL_DEBUG_MAC80211(priv, "enter\n");
2334
2335         if (priv->cfg->mod_params->sw_crypto) {
2336                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2337                 return -EOPNOTSUPP;
2338         }
2339         addr = sta ? sta->addr : iwl_bcast_addr;
2340         sta_id = iwl_find_station(priv, addr);
2341         if (sta_id == IWL_INVALID_STATION) {
2342                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2343                                    addr);
2344                 return -EINVAL;
2345
2346         }
2347
2348         mutex_lock(&priv->mutex);
2349         iwl_scan_cancel_timeout(priv, 100);
2350         mutex_unlock(&priv->mutex);
2351
2352         /* If we are getting WEP group key and we didn't receive any key mapping
2353          * so far, we are in legacy wep mode (group key only), otherwise we are
2354          * in 1X mode.
2355          * In legacy wep mode, we use another host command to the uCode */
2356         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2357                 priv->iw_mode != NL80211_IFTYPE_AP) {
2358                 if (cmd == SET_KEY)
2359                         is_default_wep_key = !priv->key_mapping_key;
2360                 else
2361                         is_default_wep_key =
2362                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2363         }
2364
2365         switch (cmd) {
2366         case SET_KEY:
2367                 if (is_default_wep_key)
2368                         ret = iwl_set_default_wep_key(priv, key);
2369                 else
2370                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2371
2372                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2373                 break;
2374         case DISABLE_KEY:
2375                 if (is_default_wep_key)
2376                         ret = iwl_remove_default_wep_key(priv, key);
2377                 else
2378                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2379
2380                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2381                 break;
2382         default:
2383                 ret = -EINVAL;
2384         }
2385
2386         IWL_DEBUG_MAC80211(priv, "leave\n");
2387
2388         return ret;
2389 }
2390
2391 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2392                              enum ieee80211_ampdu_mlme_action action,
2393                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2394 {
2395         struct iwl_priv *priv = hw->priv;
2396         int ret;
2397
2398         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2399                      sta->addr, tid);
2400
2401         if (!(priv->cfg->sku & IWL_SKU_N))
2402                 return -EACCES;
2403
2404         switch (action) {
2405         case IEEE80211_AMPDU_RX_START:
2406                 IWL_DEBUG_HT(priv, "start Rx\n");
2407                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2408         case IEEE80211_AMPDU_RX_STOP:
2409                 IWL_DEBUG_HT(priv, "stop Rx\n");
2410                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2411                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2412                         return 0;
2413                 else
2414                         return ret;
2415         case IEEE80211_AMPDU_TX_START:
2416                 IWL_DEBUG_HT(priv, "start Tx\n");
2417                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2418         case IEEE80211_AMPDU_TX_STOP:
2419                 IWL_DEBUG_HT(priv, "stop Tx\n");
2420                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2421                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2422                         return 0;
2423                 else
2424                         return ret;
2425         default:
2426                 IWL_DEBUG_HT(priv, "unknown\n");
2427                 return -EINVAL;
2428                 break;
2429         }
2430         return 0;
2431 }
2432
2433 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2434                              struct ieee80211_low_level_stats *stats)
2435 {
2436         struct iwl_priv *priv = hw->priv;
2437
2438         priv = hw->priv;
2439         IWL_DEBUG_MAC80211(priv, "enter\n");
2440         IWL_DEBUG_MAC80211(priv, "leave\n");
2441
2442         return 0;
2443 }
2444
2445 /*****************************************************************************
2446  *
2447  * sysfs attributes
2448  *
2449  *****************************************************************************/
2450
2451 #ifdef CONFIG_IWLWIFI_DEBUG
2452
2453 /*
2454  * The following adds a new attribute to the sysfs representation
2455  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2456  * used for controlling the debug level.
2457  *
2458  * See the level definitions in iwl for details.
2459  *
2460  * FIXME This file can be deprecated as the module parameter is
2461  * writable and users can thus also change the debug level
2462  * using the /sys/module/iwl3945/parameters/debug file.
2463  */
2464
2465 static ssize_t show_debug_level(struct device *d,
2466                                 struct device_attribute *attr, char *buf)
2467 {
2468         return sprintf(buf, "0x%08X\n", iwl_debug_level);
2469 }
2470 static ssize_t store_debug_level(struct device *d,
2471                                 struct device_attribute *attr,
2472                                  const char *buf, size_t count)
2473 {
2474         struct iwl_priv *priv = dev_get_drvdata(d);
2475         unsigned long val;
2476         int ret;
2477
2478         ret = strict_strtoul(buf, 0, &val);
2479         if (ret)
2480                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2481         else
2482                 iwl_debug_level = val;
2483
2484         return strnlen(buf, count);
2485 }
2486
2487 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2488                         show_debug_level, store_debug_level);
2489
2490
2491 #endif /* CONFIG_IWLWIFI_DEBUG */
2492
2493
2494 static ssize_t show_version(struct device *d,
2495                                 struct device_attribute *attr, char *buf)
2496 {
2497         struct iwl_priv *priv = dev_get_drvdata(d);
2498         struct iwl_alive_resp *palive = &priv->card_alive;
2499         ssize_t pos = 0;
2500         u16 eeprom_ver;
2501
2502         if (palive->is_valid)
2503                 pos += sprintf(buf + pos,
2504                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2505                                 "fw type: 0x%01X 0x%01X\n",
2506                                 palive->ucode_major, palive->ucode_minor,
2507                                 palive->sw_rev[0], palive->sw_rev[1],
2508                                 palive->ver_type, palive->ver_subtype);
2509         else
2510                 pos += sprintf(buf + pos, "fw not loaded\n");
2511
2512         if (priv->eeprom) {
2513                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2514                 pos += sprintf(buf + pos, "NVM Type: %s, version: 0x%x\n",
2515                                (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
2516                                ? "OTP" : "EEPROM", eeprom_ver);
2517
2518         } else {
2519                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2520         }
2521
2522         return pos;
2523 }
2524
2525 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2526
2527 static ssize_t show_temperature(struct device *d,
2528                                 struct device_attribute *attr, char *buf)
2529 {
2530         struct iwl_priv *priv = dev_get_drvdata(d);
2531
2532         if (!iwl_is_alive(priv))
2533                 return -EAGAIN;
2534
2535         return sprintf(buf, "%d\n", priv->temperature);
2536 }
2537
2538 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2539
2540 static ssize_t show_tx_power(struct device *d,
2541                              struct device_attribute *attr, char *buf)
2542 {
2543         struct iwl_priv *priv = dev_get_drvdata(d);
2544
2545         if (!iwl_is_ready_rf(priv))
2546                 return sprintf(buf, "off\n");
2547         else
2548                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2549 }
2550
2551 static ssize_t store_tx_power(struct device *d,
2552                               struct device_attribute *attr,
2553                               const char *buf, size_t count)
2554 {
2555         struct iwl_priv *priv = dev_get_drvdata(d);
2556         unsigned long val;
2557         int ret;
2558
2559         ret = strict_strtoul(buf, 10, &val);
2560         if (ret)
2561                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2562         else
2563                 iwl_set_tx_power(priv, val, false);
2564
2565         return count;
2566 }
2567
2568 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2569
2570 static ssize_t show_flags(struct device *d,
2571                           struct device_attribute *attr, char *buf)
2572 {
2573         struct iwl_priv *priv = dev_get_drvdata(d);
2574
2575         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2576 }
2577
2578 static ssize_t store_flags(struct device *d,
2579                            struct device_attribute *attr,
2580                            const char *buf, size_t count)
2581 {
2582         struct iwl_priv *priv = dev_get_drvdata(d);
2583         unsigned long val;
2584         u32 flags;
2585         int ret = strict_strtoul(buf, 0, &val);
2586         if (ret)
2587                 return ret;
2588         flags = (u32)val;
2589
2590         mutex_lock(&priv->mutex);
2591         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2592                 /* Cancel any currently running scans... */
2593                 if (iwl_scan_cancel_timeout(priv, 100))
2594                         IWL_WARN(priv, "Could not cancel scan.\n");
2595                 else {
2596                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2597                         priv->staging_rxon.flags = cpu_to_le32(flags);
2598                         iwlcore_commit_rxon(priv);
2599                 }
2600         }
2601         mutex_unlock(&priv->mutex);
2602
2603         return count;
2604 }
2605
2606 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2607
2608 static ssize_t show_filter_flags(struct device *d,
2609                                  struct device_attribute *attr, char *buf)
2610 {
2611         struct iwl_priv *priv = dev_get_drvdata(d);
2612
2613         return sprintf(buf, "0x%04X\n",
2614                 le32_to_cpu(priv->active_rxon.filter_flags));
2615 }
2616
2617 static ssize_t store_filter_flags(struct device *d,
2618                                   struct device_attribute *attr,
2619                                   const char *buf, size_t count)
2620 {
2621         struct iwl_priv *priv = dev_get_drvdata(d);
2622         unsigned long val;
2623         u32 filter_flags;
2624         int ret = strict_strtoul(buf, 0, &val);
2625         if (ret)
2626                 return ret;
2627         filter_flags = (u32)val;
2628
2629         mutex_lock(&priv->mutex);
2630         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2631                 /* Cancel any currently running scans... */
2632                 if (iwl_scan_cancel_timeout(priv, 100))
2633                         IWL_WARN(priv, "Could not cancel scan.\n");
2634                 else {
2635                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2636                                        "0x%04X\n", filter_flags);
2637                         priv->staging_rxon.filter_flags =
2638                                 cpu_to_le32(filter_flags);
2639                         iwlcore_commit_rxon(priv);
2640                 }
2641         }
2642         mutex_unlock(&priv->mutex);
2643
2644         return count;
2645 }
2646
2647 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2648                    store_filter_flags);
2649
2650 static ssize_t store_power_level(struct device *d,
2651                                  struct device_attribute *attr,
2652                                  const char *buf, size_t count)
2653 {
2654         struct iwl_priv *priv = dev_get_drvdata(d);
2655         int ret;
2656         unsigned long mode;
2657
2658
2659         mutex_lock(&priv->mutex);
2660
2661         ret = strict_strtoul(buf, 10, &mode);
2662         if (ret)
2663                 goto out;
2664
2665         ret = iwl_power_set_user_mode(priv, mode);
2666         if (ret) {
2667                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
2668                 goto out;
2669         }
2670         ret = count;
2671
2672  out:
2673         mutex_unlock(&priv->mutex);
2674         return ret;
2675 }
2676
2677 static ssize_t show_power_level(struct device *d,
2678                                 struct device_attribute *attr, char *buf)
2679 {
2680         struct iwl_priv *priv = dev_get_drvdata(d);
2681         int level = priv->power_data.power_mode;
2682         char *p = buf;
2683
2684         p += sprintf(p, "%d\n", level);
2685         return p - buf + 1;
2686 }
2687
2688 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
2689                    store_power_level);
2690
2691
2692 static ssize_t show_statistics(struct device *d,
2693                                struct device_attribute *attr, char *buf)
2694 {
2695         struct iwl_priv *priv = dev_get_drvdata(d);
2696         u32 size = sizeof(struct iwl_notif_statistics);
2697         u32 len = 0, ofs = 0;
2698         u8 *data = (u8 *)&priv->statistics;
2699         int rc = 0;
2700
2701         if (!iwl_is_alive(priv))
2702                 return -EAGAIN;
2703
2704         mutex_lock(&priv->mutex);
2705         rc = iwl_send_statistics_request(priv, 0);
2706         mutex_unlock(&priv->mutex);
2707
2708         if (rc) {
2709                 len = sprintf(buf,
2710                               "Error sending statistics request: 0x%08X\n", rc);
2711                 return len;
2712         }
2713
2714         while (size && (PAGE_SIZE - len)) {
2715                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2716                                    PAGE_SIZE - len, 1);
2717                 len = strlen(buf);
2718                 if (PAGE_SIZE - len)
2719                         buf[len++] = '\n';
2720
2721                 ofs += 16;
2722                 size -= min(size, 16U);
2723         }
2724
2725         return len;
2726 }
2727
2728 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
2729
2730
2731 /*****************************************************************************
2732  *
2733  * driver setup and teardown
2734  *
2735  *****************************************************************************/
2736
2737 static void iwl_setup_deferred_work(struct iwl_priv *priv)
2738 {
2739         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
2740
2741         init_waitqueue_head(&priv->wait_command_queue);
2742
2743         INIT_WORK(&priv->up, iwl_bg_up);
2744         INIT_WORK(&priv->restart, iwl_bg_restart);
2745         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
2746         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
2747         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
2748         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
2749         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
2750
2751         iwl_setup_scan_deferred_work(priv);
2752
2753         if (priv->cfg->ops->lib->setup_deferred_work)
2754                 priv->cfg->ops->lib->setup_deferred_work(priv);
2755
2756         init_timer(&priv->statistics_periodic);
2757         priv->statistics_periodic.data = (unsigned long)priv;
2758         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
2759
2760         if (!priv->cfg->use_isr_legacy)
2761                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2762                         iwl_irq_tasklet, (unsigned long)priv);
2763         else
2764                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2765                         iwl_irq_tasklet_legacy, (unsigned long)priv);
2766 }
2767
2768 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
2769 {
2770         if (priv->cfg->ops->lib->cancel_deferred_work)
2771                 priv->cfg->ops->lib->cancel_deferred_work(priv);
2772
2773         cancel_delayed_work_sync(&priv->init_alive_start);
2774         cancel_delayed_work(&priv->scan_check);
2775         cancel_delayed_work(&priv->alive_start);
2776         cancel_work_sync(&priv->beacon_update);
2777         del_timer_sync(&priv->statistics_periodic);
2778 }
2779
2780 static struct attribute *iwl_sysfs_entries[] = {
2781         &dev_attr_flags.attr,
2782         &dev_attr_filter_flags.attr,
2783         &dev_attr_power_level.attr,
2784         &dev_attr_statistics.attr,
2785         &dev_attr_temperature.attr,
2786         &dev_attr_tx_power.attr,
2787 #ifdef CONFIG_IWLWIFI_DEBUG
2788         &dev_attr_debug_level.attr,
2789 #endif
2790         &dev_attr_version.attr,
2791         NULL
2792 };
2793
2794 static struct attribute_group iwl_attribute_group = {
2795         .name = NULL,           /* put in device directory */
2796         .attrs = iwl_sysfs_entries,
2797 };
2798
2799 static struct ieee80211_ops iwl_hw_ops = {
2800         .tx = iwl_mac_tx,
2801         .start = iwl_mac_start,
2802         .stop = iwl_mac_stop,
2803         .add_interface = iwl_mac_add_interface,
2804         .remove_interface = iwl_mac_remove_interface,
2805         .config = iwl_mac_config,
2806         .configure_filter = iwl_configure_filter,
2807         .set_key = iwl_mac_set_key,
2808         .update_tkip_key = iwl_mac_update_tkip_key,
2809         .get_stats = iwl_mac_get_stats,
2810         .get_tx_stats = iwl_mac_get_tx_stats,
2811         .conf_tx = iwl_mac_conf_tx,
2812         .reset_tsf = iwl_mac_reset_tsf,
2813         .bss_info_changed = iwl_bss_info_changed,
2814         .ampdu_action = iwl_mac_ampdu_action,
2815         .hw_scan = iwl_mac_hw_scan
2816 };
2817
2818 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2819 {
2820         int err = 0;
2821         struct iwl_priv *priv;
2822         struct ieee80211_hw *hw;
2823         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
2824         unsigned long flags;
2825         u16 pci_cmd;
2826
2827         /************************
2828          * 1. Allocating HW data
2829          ************************/
2830
2831         /* Disabling hardware scan means that mac80211 will perform scans
2832          * "the hard way", rather than using device's scan. */
2833         if (cfg->mod_params->disable_hw_scan) {
2834                 if (iwl_debug_level & IWL_DL_INFO)
2835                         dev_printk(KERN_DEBUG, &(pdev->dev),
2836                                    "Disabling hw_scan\n");
2837                 iwl_hw_ops.hw_scan = NULL;
2838         }
2839
2840         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
2841         if (!hw) {
2842                 err = -ENOMEM;
2843                 goto out;
2844         }
2845         priv = hw->priv;
2846         /* At this point both hw and priv are allocated. */
2847
2848         SET_IEEE80211_DEV(hw, &pdev->dev);
2849
2850         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
2851         priv->cfg = cfg;
2852         priv->pci_dev = pdev;
2853         priv->inta_mask = CSR_INI_SET_MASK;
2854
2855 #ifdef CONFIG_IWLWIFI_DEBUG
2856         atomic_set(&priv->restrict_refcnt, 0);
2857 #endif
2858
2859         /**************************
2860          * 2. Initializing PCI bus
2861          **************************/
2862         if (pci_enable_device(pdev)) {
2863                 err = -ENODEV;
2864                 goto out_ieee80211_free_hw;
2865         }
2866
2867         pci_set_master(pdev);
2868
2869         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2870         if (!err)
2871                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2872         if (err) {
2873                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2874                 if (!err)
2875                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2876                 /* both attempts failed: */
2877                 if (err) {
2878                         IWL_WARN(priv, "No suitable DMA available.\n");
2879                         goto out_pci_disable_device;
2880                 }
2881         }
2882
2883         err = pci_request_regions(pdev, DRV_NAME);
2884         if (err)
2885                 goto out_pci_disable_device;
2886
2887         pci_set_drvdata(pdev, priv);
2888
2889
2890         /***********************
2891          * 3. Read REV register
2892          ***********************/
2893         priv->hw_base = pci_iomap(pdev, 0, 0);
2894         if (!priv->hw_base) {
2895                 err = -ENODEV;
2896                 goto out_pci_release_regions;
2897         }
2898
2899         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
2900                 (unsigned long long) pci_resource_len(pdev, 0));
2901         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
2902
2903         /* this spin lock will be used in apm_ops.init and EEPROM access
2904          * we should init now
2905          */
2906         spin_lock_init(&priv->reg_lock);
2907         iwl_hw_detect(priv);
2908         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
2909                 priv->cfg->name, priv->hw_rev);
2910
2911         /* We disable the RETRY_TIMEOUT register (0x41) to keep
2912          * PCI Tx retries from interfering with C3 CPU state */
2913         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2914
2915         iwl_prepare_card_hw(priv);
2916         if (!priv->hw_ready) {
2917                 IWL_WARN(priv, "Failed, HW not ready\n");
2918                 goto out_iounmap;
2919         }
2920
2921         /* amp init */
2922         err = priv->cfg->ops->lib->apm_ops.init(priv);
2923         if (err < 0) {
2924                 IWL_ERR(priv, "Failed to init APMG\n");
2925                 goto out_iounmap;
2926         }
2927         /*****************
2928          * 4. Read EEPROM
2929          *****************/
2930         /* Read the EEPROM */
2931         err = iwl_eeprom_init(priv);
2932         if (err) {
2933                 IWL_ERR(priv, "Unable to init EEPROM\n");
2934                 goto out_iounmap;
2935         }
2936         err = iwl_eeprom_check_version(priv);
2937         if (err)
2938                 goto out_free_eeprom;
2939
2940         /* extract MAC Address */
2941         iwl_eeprom_get_mac(priv, priv->mac_addr);
2942         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
2943         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
2944
2945         /************************
2946          * 5. Setup HW constants
2947          ************************/
2948         if (iwl_set_hw_params(priv)) {
2949                 IWL_ERR(priv, "failed to set hw parameters\n");
2950                 goto out_free_eeprom;
2951         }
2952
2953         /*******************
2954          * 6. Setup priv
2955          *******************/
2956
2957         err = iwl_init_drv(priv);
2958         if (err)
2959                 goto out_free_eeprom;
2960         /* At this point both hw and priv are initialized. */
2961
2962         /********************
2963          * 7. Setup services
2964          ********************/
2965         spin_lock_irqsave(&priv->lock, flags);
2966         iwl_disable_interrupts(priv);
2967         spin_unlock_irqrestore(&priv->lock, flags);
2968
2969         pci_enable_msi(priv->pci_dev);
2970
2971         iwl_alloc_isr_ict(priv);
2972         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
2973                           IRQF_SHARED, DRV_NAME, priv);
2974         if (err) {
2975                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
2976                 goto out_disable_msi;
2977         }
2978         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
2979         if (err) {
2980                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
2981                 goto out_free_irq;
2982         }
2983
2984         iwl_setup_deferred_work(priv);
2985         iwl_setup_rx_handlers(priv);
2986
2987         /**********************************
2988          * 8. Setup and register mac80211
2989          **********************************/
2990
2991         /* enable interrupts if needed: hw bug w/a */
2992         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
2993         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2994                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2995                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
2996         }
2997
2998         iwl_enable_interrupts(priv);
2999
3000         err = iwl_setup_mac(priv);
3001         if (err)
3002                 goto out_remove_sysfs;
3003
3004         err = iwl_dbgfs_register(priv, DRV_NAME);
3005         if (err)
3006                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3007
3008         /* If platform's RF_KILL switch is NOT set to KILL */
3009         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3010                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3011         else
3012                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3013
3014         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3015                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3016
3017         iwl_power_initialize(priv);
3018         return 0;
3019
3020  out_remove_sysfs:
3021         destroy_workqueue(priv->workqueue);
3022         priv->workqueue = NULL;
3023         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3024  out_free_irq:
3025         free_irq(priv->pci_dev->irq, priv);
3026         iwl_free_isr_ict(priv);
3027  out_disable_msi:
3028         pci_disable_msi(priv->pci_dev);
3029         iwl_uninit_drv(priv);
3030  out_free_eeprom:
3031         iwl_eeprom_free(priv);
3032  out_iounmap:
3033         pci_iounmap(pdev, priv->hw_base);
3034  out_pci_release_regions:
3035         pci_set_drvdata(pdev, NULL);
3036         pci_release_regions(pdev);
3037  out_pci_disable_device:
3038         pci_disable_device(pdev);
3039  out_ieee80211_free_hw:
3040         ieee80211_free_hw(priv->hw);
3041  out:
3042         return err;
3043 }
3044
3045 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3046 {
3047         struct iwl_priv *priv = pci_get_drvdata(pdev);
3048         unsigned long flags;
3049
3050         if (!priv)
3051                 return;
3052
3053         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3054
3055         iwl_dbgfs_unregister(priv);
3056         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3057
3058         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3059          * to be called and iwl_down since we are removing the device
3060          * we need to set STATUS_EXIT_PENDING bit.
3061          */
3062         set_bit(STATUS_EXIT_PENDING, &priv->status);
3063         if (priv->mac80211_registered) {
3064                 ieee80211_unregister_hw(priv->hw);
3065                 priv->mac80211_registered = 0;
3066         } else {
3067                 iwl_down(priv);
3068         }
3069
3070         /* make sure we flush any pending irq or
3071          * tasklet for the driver
3072          */
3073         spin_lock_irqsave(&priv->lock, flags);
3074         iwl_disable_interrupts(priv);
3075         spin_unlock_irqrestore(&priv->lock, flags);
3076
3077         iwl_synchronize_irq(priv);
3078
3079         iwl_dealloc_ucode_pci(priv);
3080
3081         if (priv->rxq.bd)
3082                 iwl_rx_queue_free(priv, &priv->rxq);
3083         iwl_hw_txq_ctx_free(priv);
3084
3085         iwl_clear_stations_table(priv);
3086         iwl_eeprom_free(priv);
3087
3088
3089         /*netif_stop_queue(dev); */
3090         flush_workqueue(priv->workqueue);
3091
3092         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3093          * priv->workqueue... so we can't take down the workqueue
3094          * until now... */
3095         destroy_workqueue(priv->workqueue);
3096         priv->workqueue = NULL;
3097
3098         free_irq(priv->pci_dev->irq, priv);
3099         pci_disable_msi(priv->pci_dev);
3100         pci_iounmap(pdev, priv->hw_base);
3101         pci_release_regions(pdev);
3102         pci_disable_device(pdev);
3103         pci_set_drvdata(pdev, NULL);
3104
3105         iwl_uninit_drv(priv);
3106
3107         iwl_free_isr_ict(priv);
3108
3109         if (priv->ibss_beacon)
3110                 dev_kfree_skb(priv->ibss_beacon);
3111
3112         ieee80211_free_hw(priv->hw);
3113 }
3114
3115
3116 /*****************************************************************************
3117  *
3118  * driver and module entry point
3119  *
3120  *****************************************************************************/
3121
3122 /* Hardware specific file defines the PCI IDs table for that hardware module */
3123 static struct pci_device_id iwl_hw_card_ids[] = {
3124 #ifdef CONFIG_IWL4965
3125         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3126         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3127 #endif /* CONFIG_IWL4965 */
3128 #ifdef CONFIG_IWL5000
3129         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3130         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3131         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3132         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3133         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3134         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3135         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3136         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3137         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3138         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3139 /* 5350 WiFi/WiMax */
3140         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3141         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3142         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3143 /* 5150 Wifi/WiMax */
3144         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3145         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3146 /* 6000/6050 Series */
3147         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3148         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3149         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3150         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3151         {IWL_PCI_DEVICE(0x422C, PCI_ANY_ID, iwl6000_2agn_cfg)},
3152         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3153         {IWL_PCI_DEVICE(0x4239, PCI_ANY_ID, iwl6000_2agn_cfg)},
3154         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3155         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3156         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3157         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3158         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3159         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3160 /* 1000 Series WiFi */
3161         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
3162         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
3163 #endif /* CONFIG_IWL5000 */
3164
3165         {0}
3166 };
3167 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3168
3169 static struct pci_driver iwl_driver = {
3170         .name = DRV_NAME,
3171         .id_table = iwl_hw_card_ids,
3172         .probe = iwl_pci_probe,
3173         .remove = __devexit_p(iwl_pci_remove),
3174 #ifdef CONFIG_PM
3175         .suspend = iwl_pci_suspend,
3176         .resume = iwl_pci_resume,
3177 #endif
3178 };
3179
3180 static int __init iwl_init(void)
3181 {
3182
3183         int ret;
3184         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3185         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3186
3187         ret = iwlagn_rate_control_register();
3188         if (ret) {
3189                 printk(KERN_ERR DRV_NAME
3190                        "Unable to register rate control algorithm: %d\n", ret);
3191                 return ret;
3192         }
3193
3194         ret = pci_register_driver(&iwl_driver);
3195         if (ret) {
3196                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3197                 goto error_register;
3198         }
3199
3200         return ret;
3201
3202 error_register:
3203         iwlagn_rate_control_unregister();
3204         return ret;
3205 }
3206
3207 static void __exit iwl_exit(void)
3208 {
3209         pci_unregister_driver(&iwl_driver);
3210         iwlagn_rate_control_unregister();
3211 }
3212
3213 module_exit(iwl_exit);
3214 module_init(iwl_init);
3215
3216 #ifdef CONFIG_IWLWIFI_DEBUG
3217 module_param_named(debug50, iwl_debug_level, uint, 0444);
3218 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3219 module_param_named(debug, iwl_debug_level, uint, 0644);
3220 MODULE_PARM_DESC(debug, "debug output mask");
3221 #endif
3222