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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/sched.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #define DRV_NAME        "iwlagn"
  49
  50 #include "iwl-eeprom.h"
  51 #include "iwl-dev.h"
  52 #include "iwl-core.h"
  53 #include "iwl-io.h"
  54 #include "iwl-helpers.h"
  55 #include "iwl-sta.h"
  56 #include "iwl-calib.h"
  57 #include "iwl-agn.h"
  58
  59
  60 /******************************************************************************
  61  *
  62  * module boiler plate
  63  *
  64  ******************************************************************************/
  65
  66 /*
  67  * module name, copyright, version, etc.
  68  */
  69 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  70
  71 #ifdef CONFIG_IWLWIFI_DEBUG
  72 #define VD "d"
  73 #else
  74 #define VD
  75 #endif
  76
  77 #define DRV_VERSION     IWLWIFI_VERSION VD
  78
  79
  80 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  81 MODULE_VERSION(DRV_VERSION);
  82 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  83 MODULE_LICENSE("GPL");
  84 MODULE_ALIAS("iwl4965");
  85
  86 /*************** STATION TABLE MANAGEMENT ****
  87  * mac80211 should be examined to determine if sta_info is duplicating
  88  * the functionality provided here
  89  */
  90
  91 /**************************************************************/
  92
  93 /**
  94  * iwl_commit_rxon - commit staging_rxon to hardware
  95  *
  96  * The RXON command in staging_rxon is committed to the hardware and
  97  * the active_rxon structure is updated with the new data.  This
  98  * function correctly transitions out of the RXON_ASSOC_MSK state if
  99  * a HW tune is required based on the RXON structure changes.
 100  */
 101 int iwl_commit_rxon(struct iwl_priv *priv)
 102 {
 103         /* cast away the const for active_rxon in this function */
 104         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 105         int ret;
 106         bool new_assoc =
 107                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 108
 109         if (!iwl_is_alive(priv))
 110                 return -EBUSY;
 111
 112         /* always get timestamp with Rx frame */
 113         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 114
 115         ret = iwl_check_rxon_cmd(priv);
 116         if (ret) {
 117                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 118                 return -EINVAL;
 119         }
 120
 121         /*
 122          * receive commit_rxon request
 123          * abort any previous channel switch if still in process
 124          */
 125         if (priv->switch_rxon.switch_in_progress &&
 126             (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
 127                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 128                       le16_to_cpu(priv->switch_rxon.channel));
 129                 priv->switch_rxon.switch_in_progress = false;
 130         }
 131
 132         /* If we don't need to send a full RXON, we can use
 133          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 134          * and other flags for the current radio configuration. */
 135         if (!iwl_full_rxon_required(priv)) {
 136                 ret = iwl_send_rxon_assoc(priv);
 137                 if (ret) {
 138                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 139                         return ret;
 140                 }
 141
 142                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 143                 iwl_print_rx_config_cmd(priv);
 144                 return 0;
 145         }
 146
 147         /* station table will be cleared */
 148         priv->assoc_station_added = 0;
 149
 150         /* If we are currently associated and the new config requires
 151          * an RXON_ASSOC and the new config wants the associated mask enabled,
 152          * we must clear the associated from the active configuration
 153          * before we apply the new config */
 154         if (iwl_is_associated(priv) && new_assoc) {
 155                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 156                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 157
 158                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 159                                       sizeof(struct iwl_rxon_cmd),
 160                                       &priv->active_rxon);
 161
 162                 /* If the mask clearing failed then we set
 163                  * active_rxon back to what it was previously */
 164                 if (ret) {
 165                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 166                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 167                         return ret;
 168                 }
 169         }
 170
 171         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 172                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 173                        "* channel = %d\n"
 174                        "* bssid = %pM\n",
 175                        (new_assoc ? "" : "out"),
 176                        le16_to_cpu(priv->staging_rxon.channel),
 177                        priv->staging_rxon.bssid_addr);
 178
 179         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 180
 181         /* Apply the new configuration
 182          * RXON unassoc clears the station table in uCode, send it before
 183          * we add the bcast station. If assoc bit is set, we will send RXON
 184          * after having added the bcast and bssid station.
 185          */
 186         if (!new_assoc) {
 187                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 188                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 189                 if (ret) {
 190                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 191                         return ret;
 192                 }
 193                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 194         }
 195
 196         iwl_clear_stations_table(priv);
 197
 198         priv->start_calib = 0;
 199
 200         /* Add the broadcast address so we can send broadcast frames */
 201         priv->cfg->ops->lib->add_bcast_station(priv);
 202
 203
 204         /* If we have set the ASSOC_MSK and we are in BSS mode then
 205          * add the IWL_AP_ID to the station rate table */
 206         if (new_assoc) {
 207                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 208                         ret = iwl_rxon_add_station(priv,
 209                                            priv->active_rxon.bssid_addr, 1);
 210                         if (ret == IWL_INVALID_STATION) {
 211                                 IWL_ERR(priv,
 212                                         "Error adding AP address for TX.\n");
 213                                 return -EIO;
 214                         }
 215                         priv->assoc_station_added = 1;
 216                         if (priv->default_wep_key &&
 217                             iwl_send_static_wepkey_cmd(priv, 0))
 218                                 IWL_ERR(priv,
 219                                         "Could not send WEP static key.\n");
 220                 }
 221
 222                 /*
 223                  * allow CTS-to-self if possible for new association.
 224                  * this is relevant only for 5000 series and up,
 225                  * but will not damage 4965
 226                  */
 227                 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 228
 229                 /* Apply the new configuration
 230                  * RXON assoc doesn't clear the station table in uCode,
 231                  */
 232                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 233                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 234                 if (ret) {
 235                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 236                         return ret;
 237                 }
 238                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 239         }
 240         iwl_print_rx_config_cmd(priv);
 241
 242         iwl_init_sensitivity(priv);
 243
 244         /* If we issue a new RXON command which required a tune then we must
 245          * send a new TXPOWER command or we won't be able to Tx any frames */
 246         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 247         if (ret) {
 248                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 249                 return ret;
 250         }
 251
 252         return 0;
 253 }
 254
 255 void iwl_update_chain_flags(struct iwl_priv *priv)
 256 {
 257
 258         if (priv->cfg->ops->hcmd->set_rxon_chain)
 259                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 260         iwlcore_commit_rxon(priv);
 261 }
 262
 263 static void iwl_clear_free_frames(struct iwl_priv *priv)
 264 {
 265         struct list_head *element;
 266
 267         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 268                        priv->frames_count);
 269
 270         while (!list_empty(&priv->free_frames)) {
 271                 element = priv->free_frames.next;
 272                 list_del(element);
 273                 kfree(list_entry(element, struct iwl_frame, list));
 274                 priv->frames_count--;
 275         }
 276
 277         if (priv->frames_count) {
 278                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 279                             priv->frames_count);
 280                 priv->frames_count = 0;
 281         }
 282 }
 283
 284 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 285 {
 286         struct iwl_frame *frame;
 287         struct list_head *element;
 288         if (list_empty(&priv->free_frames)) {
 289                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 290                 if (!frame) {
 291                         IWL_ERR(priv, "Could not allocate frame!\n");
 292                         return NULL;
 293                 }
 294
 295                 priv->frames_count++;
 296                 return frame;
 297         }
 298
 299         element = priv->free_frames.next;
 300         list_del(element);
 301         return list_entry(element, struct iwl_frame, list);
 302 }
 303
 304 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 305 {
 306         memset(frame, 0, sizeof(*frame));
 307         list_add(&frame->list, &priv->free_frames);
 308 }
 309
 310 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
 311                                           struct ieee80211_hdr *hdr,
 312                                           int left)
 313 {
 314         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 315             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 316              (priv->iw_mode != NL80211_IFTYPE_AP)))
 317                 return 0;
 318
 319         if (priv->ibss_beacon->len > left)
 320                 return 0;
 321
 322         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 323
 324         return priv->ibss_beacon->len;
 325 }
 326
 327 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 328 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 329                 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 330                 u8 *beacon, u32 frame_size)
 331 {
 332         u16 tim_idx;
 333         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 334
 335         /*
 336          * The index is relative to frame start but we start looking at the
 337          * variable-length part of the beacon.
 338          */
 339         tim_idx = mgmt->u.beacon.variable - beacon;
 340
 341         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 342         while ((tim_idx < (frame_size - 2)) &&
 343                         (beacon[tim_idx] != WLAN_EID_TIM))
 344                 tim_idx += beacon[tim_idx+1] + 2;
 345
 346         /* If TIM field was found, set variables */
 347         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 348                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 349                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 350         } else
 351                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 352 }
 353
 354 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 355                                        struct iwl_frame *frame)
 356 {
 357         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 358         u32 frame_size;
 359         u32 rate_flags;
 360         u32 rate;
 361         /*
 362          * We have to set up the TX command, the TX Beacon command, and the
 363          * beacon contents.
 364          */
 365
 366         /* Initialize memory */
 367         tx_beacon_cmd = &frame->u.beacon;
 368         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 369
 370         /* Set up TX beacon contents */
 371         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 372                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 373         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
 374                 return 0;
 375
 376         /* Set up TX command fields */
 377         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 378         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 379         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 380         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 381                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 382
 383         /* Set up TX beacon command fields */
 384         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
 385                         frame_size);
 386
 387         /* Set up packet rate and flags */
 388         rate = iwl_rate_get_lowest_plcp(priv);
 389         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
 390         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 391         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
 392                 rate_flags |= RATE_MCS_CCK_MSK;
 393         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
 394                         rate_flags);
 395
 396         return sizeof(*tx_beacon_cmd) + frame_size;
 397 }
 398 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 399 {
 400         struct iwl_frame *frame;
 401         unsigned int frame_size;
 402         int rc;
 403
 404         frame = iwl_get_free_frame(priv);
 405         if (!frame) {
 406                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 407                           "command.\n");
 408                 return -ENOMEM;
 409         }
 410
 411         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
 412         if (!frame_size) {
 413                 IWL_ERR(priv, "Error configuring the beacon command\n");
 414                 iwl_free_frame(priv, frame);
 415                 return -EINVAL;
 416         }
 417
 418         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 419                               &frame->u.cmd[0]);
 420
 421         iwl_free_frame(priv, frame);
 422
 423         return rc;
 424 }
 425
 426 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 427 {
 428         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 429
 430         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 431         if (sizeof(dma_addr_t) > sizeof(u32))
 432                 addr |=
 433                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 434
 435         return addr;
 436 }
 437
 438 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 439 {
 440         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 441
 442         return le16_to_cpu(tb->hi_n_len) >> 4;
 443 }
 444
 445 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 446                                   dma_addr_t addr, u16 len)
 447 {
 448         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 449         u16 hi_n_len = len << 4;
 450
 451         put_unaligned_le32(addr, &tb->lo);
 452         if (sizeof(dma_addr_t) > sizeof(u32))
 453                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 454
 455         tb->hi_n_len = cpu_to_le16(hi_n_len);
 456
 457         tfd->num_tbs = idx + 1;
 458 }
 459
 460 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 461 {
 462         return tfd->num_tbs & 0x1f;
 463 }
 464
 465 /**
 466  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 467  * @priv - driver private data
 468  * @txq - tx queue
 469  *
 470  * Does NOT advance any TFD circular buffer read/write indexes
 471  * Does NOT free the TFD itself (which is within circular buffer)
 472  */
 473 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 474 {
 475         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 476         struct iwl_tfd *tfd;
 477         struct pci_dev *dev = priv->pci_dev;
 478         int index = txq->q.read_ptr;
 479         int i;
 480         int num_tbs;
 481
 482         tfd = &tfd_tmp[index];
 483
 484         /* Sanity check on number of chunks */
 485         num_tbs = iwl_tfd_get_num_tbs(tfd);
 486
 487         if (num_tbs >= IWL_NUM_OF_TBS) {
 488                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 489                 /* @todo issue fatal error, it is quite serious situation */
 490                 return;
 491         }
 492
 493         /* Unmap tx_cmd */
 494         if (num_tbs)
 495                 pci_unmap_single(dev,
 496                                 pci_unmap_addr(&txq->meta[index], mapping),
 497                                 pci_unmap_len(&txq->meta[index], len),
 498                                 PCI_DMA_BIDIRECTIONAL);
 499
 500         /* Unmap chunks, if any. */
 501         for (i = 1; i < num_tbs; i++) {
 502                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 503                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 504
 505                 if (txq->txb) {
 506                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 507                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 508                 }
 509         }
 510 }
 511
 512 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 513                                  struct iwl_tx_queue *txq,
 514                                  dma_addr_t addr, u16 len,
 515                                  u8 reset, u8 pad)
 516 {
 517         struct iwl_queue *q;
 518         struct iwl_tfd *tfd, *tfd_tmp;
 519         u32 num_tbs;
 520
 521         q = &txq->q;
 522         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 523         tfd = &tfd_tmp[q->write_ptr];
 524
 525         if (reset)
 526                 memset(tfd, 0, sizeof(*tfd));
 527
 528         num_tbs = iwl_tfd_get_num_tbs(tfd);
 529
 530         /* Each TFD can point to a maximum 20 Tx buffers */
 531         if (num_tbs >= IWL_NUM_OF_TBS) {
 532                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 533                           IWL_NUM_OF_TBS);
 534                 return -EINVAL;
 535         }
 536
 537         BUG_ON(addr & ~DMA_BIT_MASK(36));
 538         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 539                 IWL_ERR(priv, "Unaligned address = %llx\n",
 540                           (unsigned long long)addr);
 541
 542         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 543
 544         return 0;
 545 }
 546
 547 /*
 548  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 549  * given Tx queue, and enable the DMA channel used for that queue.
 550  *
 551  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 552  * channels supported in hardware.
 553  */
 554 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 555                          struct iwl_tx_queue *txq)
 556 {
 557         int txq_id = txq->q.id;
 558
 559         /* Circular buffer (TFD queue in DRAM) physical base address */
 560         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 561                              txq->q.dma_addr >> 8);
 562
 563         return 0;
 564 }
 565
 566 /******************************************************************************
 567  *
 568  * Generic RX handler implementations
 569  *
 570  ******************************************************************************/
 571 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 572                                 struct iwl_rx_mem_buffer *rxb)
 573 {
 574         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 575         struct iwl_alive_resp *palive;
 576         struct delayed_work *pwork;
 577
 578         palive = &pkt->u.alive_frame;
 579
 580         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 581                        "0x%01X 0x%01X\n",
 582                        palive->is_valid, palive->ver_type,
 583                        palive->ver_subtype);
 584
 585         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 586                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 587                 memcpy(&priv->card_alive_init,
 588                        &pkt->u.alive_frame,
 589                        sizeof(struct iwl_init_alive_resp));
 590                 pwork = &priv->init_alive_start;
 591         } else {
 592                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 593                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 594                        sizeof(struct iwl_alive_resp));
 595                 pwork = &priv->alive_start;
 596         }
 597
 598         /* We delay the ALIVE response by 5ms to
 599          * give the HW RF Kill time to activate... */
 600         if (palive->is_valid == UCODE_VALID_OK)
 601                 queue_delayed_work(priv->workqueue, pwork,
 602                                    msecs_to_jiffies(5));
 603         else
 604                 IWL_WARN(priv, "uCode did not respond OK.\n");
 605 }
 606
 607 static void iwl_bg_beacon_update(struct work_struct *work)
 608 {
 609         struct iwl_priv *priv =
 610                 container_of(work, struct iwl_priv, beacon_update);
 611         struct sk_buff *beacon;
 612
 613         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 614         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 615
 616         if (!beacon) {
 617                 IWL_ERR(priv, "update beacon failed\n");
 618                 return;
 619         }
 620
 621         mutex_lock(&priv->mutex);
 622         /* new beacon skb is allocated every time; dispose previous.*/
 623         if (priv->ibss_beacon)
 624                 dev_kfree_skb(priv->ibss_beacon);
 625
 626         priv->ibss_beacon = beacon;
 627         mutex_unlock(&priv->mutex);
 628
 629         iwl_send_beacon_cmd(priv);
 630 }
 631
 632 /**
 633  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 634  *
 635  * This callback is provided in order to send a statistics request.
 636  *
 637  * This timer function is continually reset to execute within
 638  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 639  * was received.  We need to ensure we receive the statistics in order
 640  * to update the temperature used for calibrating the TXPOWER.
 641  */
 642 static void iwl_bg_statistics_periodic(unsigned long data)
 643 {
 644         struct iwl_priv *priv = (struct iwl_priv *)data;
 645
 646         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 647                 return;
 648
 649         /* dont send host command if rf-kill is on */
 650         if (!iwl_is_ready_rf(priv))
 651                 return;
 652
 653         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 654 }
 655
 656
 657 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 658                                         u32 start_idx, u32 num_events,
 659                                         u32 mode)
 660 {
 661         u32 i;
 662         u32 ptr;        /* SRAM byte address of log data */
 663         u32 ev, time, data; /* event log data */
 664         unsigned long reg_flags;
 665
 666         if (mode == 0)
 667                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 668         else
 669                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 670
 671         /* Make sure device is powered up for SRAM reads */
 672         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 673         if (iwl_grab_nic_access(priv)) {
 674                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 675                 return;
 676         }
 677
 678         /* Set starting address; reads will auto-increment */
 679         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
 680         rmb();
 681
 682         /*
 683          * "time" is actually "data" for mode 0 (no timestamp).
 684          * place event id # at far right for easier visual parsing.
 685          */
 686         for (i = 0; i < num_events; i++) {
 687                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 688                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 689                 if (mode == 0) {
 690                         trace_iwlwifi_dev_ucode_cont_event(priv,
 691                                                         0, time, ev);
 692                 } else {
 693                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 694                         trace_iwlwifi_dev_ucode_cont_event(priv,
 695                                                 time, data, ev);
 696                 }
 697         }
 698         /* Allow device to power down */
 699         iwl_release_nic_access(priv);
 700         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 701 }
 702
 703 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 704 {
 705         u32 capacity;   /* event log capacity in # entries */
 706         u32 base;       /* SRAM byte address of event log header */
 707         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 708         u32 num_wraps;  /* # times uCode wrapped to top of log */
 709         u32 next_entry; /* index of next entry to be written by uCode */
 710
 711         if (priv->ucode_type == UCODE_INIT)
 712                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
 713         else
 714                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 715         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
 716                 capacity = iwl_read_targ_mem(priv, base);
 717                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
 718                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
 719                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
 720         } else
 721                 return;
 722
 723         if (num_wraps == priv->event_log.num_wraps) {
 724                 iwl_print_cont_event_trace(priv,
 725                                        base, priv->event_log.next_entry,
 726                                        next_entry - priv->event_log.next_entry,
 727                                        mode);
 728                 priv->event_log.non_wraps_count++;
 729         } else {
 730                 if ((num_wraps - priv->event_log.num_wraps) > 1)
 731                         priv->event_log.wraps_more_count++;
 732                 else
 733                         priv->event_log.wraps_once_count++;
 734                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 735                                 num_wraps - priv->event_log.num_wraps,
 736                                 next_entry, priv->event_log.next_entry);
 737                 if (next_entry < priv->event_log.next_entry) {
 738                         iwl_print_cont_event_trace(priv, base,
 739                                priv->event_log.next_entry,
 740                                capacity - priv->event_log.next_entry,
 741                                mode);
 742
 743                         iwl_print_cont_event_trace(priv, base, 0,
 744                                 next_entry, mode);
 745                 } else {
 746                         iwl_print_cont_event_trace(priv, base,
 747                                next_entry, capacity - next_entry,
 748                                mode);
 749
 750                         iwl_print_cont_event_trace(priv, base, 0,
 751                                 next_entry, mode);
 752                 }
 753         }
 754         priv->event_log.num_wraps = num_wraps;
 755         priv->event_log.next_entry = next_entry;
 756 }
 757
 758 /**
 759  * iwl_bg_ucode_trace - Timer callback to log ucode event
 760  *
 761  * The timer is continually set to execute every
 762  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 763  * this function is to perform continuous uCode event logging operation
 764  * if enabled
 765  */
 766 static void iwl_bg_ucode_trace(unsigned long data)
 767 {
 768         struct iwl_priv *priv = (struct iwl_priv *)data;
 769
 770         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 771                 return;
 772
 773         if (priv->event_log.ucode_trace) {
 774                 iwl_continuous_event_trace(priv);
 775                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 776                 mod_timer(&priv->ucode_trace,
 777                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 778         }
 779 }
 780
 781 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 782                                 struct iwl_rx_mem_buffer *rxb)
 783 {
 784 #ifdef CONFIG_IWLWIFI_DEBUG
 785         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 786         struct iwl4965_beacon_notif *beacon =
 787                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 788         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 789
 790         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 791                 "tsf %d %d rate %d\n",
 792                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 793                 beacon->beacon_notify_hdr.failure_frame,
 794                 le32_to_cpu(beacon->ibss_mgr_status),
 795                 le32_to_cpu(beacon->high_tsf),
 796                 le32_to_cpu(beacon->low_tsf), rate);
 797 #endif
 798
 799         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 800             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 801                 queue_work(priv->workqueue, &priv->beacon_update);
 802 }
 803
 804 /* Handle notification from uCode that card's power state is changing
 805  * due to software, hardware, or critical temperature RFKILL */
 806 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 807                                     struct iwl_rx_mem_buffer *rxb)
 808 {
 809         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 810         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 811         unsigned long status = priv->status;
 812
 813         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 814                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 815                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 816                           (flags & CT_CARD_DISABLED) ?
 817                           "Reached" : "Not reached");
 818
 819         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 820                      CT_CARD_DISABLED)) {
 821
 822                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 823                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 824
 825                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 826                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 827
 828                 if (!(flags & RXON_CARD_DISABLED)) {
 829                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 830                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 831                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 832                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 833                 }
 834                 if (flags & CT_CARD_DISABLED)
 835                         iwl_tt_enter_ct_kill(priv);
 836         }
 837         if (!(flags & CT_CARD_DISABLED))
 838                 iwl_tt_exit_ct_kill(priv);
 839
 840         if (flags & HW_CARD_DISABLED)
 841                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 842         else
 843                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 844
 845
 846         if (!(flags & RXON_CARD_DISABLED))
 847                 iwl_scan_cancel(priv);
 848
 849         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 850              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 851                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 852                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 853         else
 854                 wake_up_interruptible(&priv->wait_command_queue);
 855 }
 856
 857 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 858 {
 859         if (src == IWL_PWR_SRC_VAUX) {
 860                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 861                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 862                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 863                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 864         } else {
 865                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 866                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 867                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 868         }
 869
 870         return 0;
 871 }
 872
 873 /**
 874  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 875  *
 876  * Setup the RX handlers for each of the reply types sent from the uCode
 877  * to the host.
 878  *
 879  * This function chains into the hardware specific files for them to setup
 880  * any hardware specific handlers as well.
 881  */
 882 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 883 {
 884         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 885         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 886         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 887         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 888                         iwl_rx_spectrum_measure_notif;
 889         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 890         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 891             iwl_rx_pm_debug_statistics_notif;
 892         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 893
 894         /*
 895          * The same handler is used for both the REPLY to a discrete
 896          * statistics request from the host as well as for the periodic
 897          * statistics notifications (after received beacons) from the uCode.
 898          */
 899         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
 900         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 901
 902         iwl_setup_rx_scan_handlers(priv);
 903
 904         /* status change handler */
 905         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 906
 907         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 908             iwl_rx_missed_beacon_notif;
 909         /* Rx handlers */
 910         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 911         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 912         /* block ack */
 913         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 914         /* Set up hardware specific Rx handlers */
 915         priv->cfg->ops->lib->rx_handler_setup(priv);
 916 }
 917
 918 /**
 919  * iwl_rx_handle - Main entry function for receiving responses from uCode
 920  *
 921  * Uses the priv->rx_handlers callback function array to invoke
 922  * the appropriate handlers, including command responses,
 923  * frame-received notifications, and other notifications.
 924  */
 925 void iwl_rx_handle(struct iwl_priv *priv)
 926 {
 927         struct iwl_rx_mem_buffer *rxb;
 928         struct iwl_rx_packet *pkt;
 929         struct iwl_rx_queue *rxq = &priv->rxq;
 930         u32 r, i;
 931         int reclaim;
 932         unsigned long flags;
 933         u8 fill_rx = 0;
 934         u32 count = 8;
 935         int total_empty;
 936
 937         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 938          * buffer that the driver may process (last buffer filled by ucode). */
 939         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 940         i = rxq->read;
 941
 942         /* Rx interrupt, but nothing sent from uCode */
 943         if (i == r)
 944                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 945
 946         /* calculate total frames need to be restock after handling RX */
 947         total_empty = r - rxq->write_actual;
 948         if (total_empty < 0)
 949                 total_empty += RX_QUEUE_SIZE;
 950
 951         if (total_empty > (RX_QUEUE_SIZE / 2))
 952                 fill_rx = 1;
 953
 954         while (i != r) {
 955                 rxb = rxq->queue[i];
 956
 957                 /* If an RXB doesn't have a Rx queue slot associated with it,
 958                  * then a bug has been introduced in the queue refilling
 959                  * routines -- catch it here */
 960                 BUG_ON(rxb == NULL);
 961
 962                 rxq->queue[i] = NULL;
 963
 964                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
 965                                PAGE_SIZE << priv->hw_params.rx_page_order,
 966                                PCI_DMA_FROMDEVICE);
 967                 pkt = rxb_addr(rxb);
 968
 969                 trace_iwlwifi_dev_rx(priv, pkt,
 970                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
 971
 972                 /* Reclaim a command buffer only if this packet is a response
 973                  *   to a (driver-originated) command.
 974                  * If the packet (e.g. Rx frame) originated from uCode,
 975                  *   there is no command buffer to reclaim.
 976                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 977                  *   but apparently a few don't get set; catch them here. */
 978                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 979                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 980                         (pkt->hdr.cmd != REPLY_RX) &&
 981                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 982                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 983                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 984                         (pkt->hdr.cmd != REPLY_TX);
 985
 986                 /* Based on type of command response or notification,
 987                  *   handle those that need handling via function in
 988                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 989                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 990                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 991                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 992                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 993                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 994                 } else {
 995                         /* No handling needed */
 996                         IWL_DEBUG_RX(priv,
 997                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 998                                 r, i, get_cmd_string(pkt->hdr.cmd),
 999                                 pkt->hdr.cmd);
1000                 }
1001
1002                 /*
1003                  * XXX: After here, we should always check rxb->page
1004                  * against NULL before touching it or its virtual
1005                  * memory (pkt). Because some rx_handler might have
1006                  * already taken or freed the pages.
1007                  */
1008
1009                 if (reclaim) {
1010                         /* Invoke any callbacks, transfer the buffer to caller,
1011                          * and fire off the (possibly) blocking iwl_send_cmd()
1012                          * as we reclaim the driver command queue */
1013                         if (rxb->page)
1014                                 iwl_tx_cmd_complete(priv, rxb);
1015                         else
1016                                 IWL_WARN(priv, "Claim null rxb?\n");
1017                 }
1018
1019                 /* Reuse the page if possible. For notification packets and
1020                  * SKBs that fail to Rx correctly, add them back into the
1021                  * rx_free list for reuse later. */
1022                 spin_lock_irqsave(&rxq->lock, flags);
1023                 if (rxb->page != NULL) {
1024                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1025                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1026                                 PCI_DMA_FROMDEVICE);
1027                         list_add_tail(&rxb->list, &rxq->rx_free);
1028                         rxq->free_count++;
1029                 } else
1030                         list_add_tail(&rxb->list, &rxq->rx_used);
1031
1032                 spin_unlock_irqrestore(&rxq->lock, flags);
1033
1034                 i = (i + 1) & RX_QUEUE_MASK;
1035                 /* If there are a lot of unused frames,
1036                  * restock the Rx queue so ucode wont assert. */
1037                 if (fill_rx) {
1038                         count++;
1039                         if (count >= 8) {
1040                                 rxq->read = i;
1041                                 iwl_rx_replenish_now(priv);
1042                                 count = 0;
1043                         }
1044                 }
1045         }
1046
1047         /* Backtrack one entry */
1048         rxq->read = i;
1049         if (fill_rx)
1050                 iwl_rx_replenish_now(priv);
1051         else
1052                 iwl_rx_queue_restock(priv);
1053 }
1054
1055 /* call this function to flush any scheduled tasklet */
1056 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1057 {
1058         /* wait to make sure we flush pending tasklet*/
1059         synchronize_irq(priv->pci_dev->irq);
1060         tasklet_kill(&priv->irq_tasklet);
1061 }
1062
1063 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
1064 {
1065         u32 inta, handled = 0;
1066         u32 inta_fh;
1067         unsigned long flags;
1068         u32 i;
1069 #ifdef CONFIG_IWLWIFI_DEBUG
1070         u32 inta_mask;
1071 #endif
1072
1073         spin_lock_irqsave(&priv->lock, flags);
1074
1075         /* Ack/clear/reset pending uCode interrupts.
1076          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1077          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1078         inta = iwl_read32(priv, CSR_INT);
1079         iwl_write32(priv, CSR_INT, inta);
1080
1081         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1082          * Any new interrupts that happen after this, either while we're
1083          * in this tasklet, or later, will show up in next ISR/tasklet. */
1084         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1085         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1086
1087 #ifdef CONFIG_IWLWIFI_DEBUG
1088         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1089                 /* just for debug */
1090                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1091                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1092                               inta, inta_mask, inta_fh);
1093         }
1094 #endif
1095
1096         spin_unlock_irqrestore(&priv->lock, flags);
1097
1098         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1099          * atomic, make sure that inta covers all the interrupts that
1100          * we've discovered, even if FH interrupt came in just after
1101          * reading CSR_INT. */
1102         if (inta_fh & CSR49_FH_INT_RX_MASK)
1103                 inta |= CSR_INT_BIT_FH_RX;
1104         if (inta_fh & CSR49_FH_INT_TX_MASK)
1105                 inta |= CSR_INT_BIT_FH_TX;
1106
1107         /* Now service all interrupt bits discovered above. */
1108         if (inta & CSR_INT_BIT_HW_ERR) {
1109                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1110
1111                 /* Tell the device to stop sending interrupts */
1112                 iwl_disable_interrupts(priv);
1113
1114                 priv->isr_stats.hw++;
1115                 iwl_irq_handle_error(priv);
1116
1117                 handled |= CSR_INT_BIT_HW_ERR;
1118
1119                 return;
1120         }
1121
1122 #ifdef CONFIG_IWLWIFI_DEBUG
1123         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1124                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1125                 if (inta & CSR_INT_BIT_SCD) {
1126                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1127                                       "the frame/frames.\n");
1128                         priv->isr_stats.sch++;
1129                 }
1130
1131                 /* Alive notification via Rx interrupt will do the real work */
1132                 if (inta & CSR_INT_BIT_ALIVE) {
1133                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1134                         priv->isr_stats.alive++;
1135                 }
1136         }
1137 #endif
1138         /* Safely ignore these bits for debug checks below */
1139         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1140
1141         /* HW RF KILL switch toggled */
1142         if (inta & CSR_INT_BIT_RF_KILL) {
1143                 int hw_rf_kill = 0;
1144                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1145                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1146                         hw_rf_kill = 1;
1147
1148                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1149                                 hw_rf_kill ? "disable radio" : "enable radio");
1150
1151                 priv->isr_stats.rfkill++;
1152
1153                 /* driver only loads ucode once setting the interface up.
1154                  * the driver allows loading the ucode even if the radio
1155                  * is killed. Hence update the killswitch state here. The
1156                  * rfkill handler will care about restarting if needed.
1157                  */
1158                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1159                         if (hw_rf_kill)
1160                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1161                         else
1162                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1163                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1164                 }
1165
1166                 handled |= CSR_INT_BIT_RF_KILL;
1167         }
1168
1169         /* Chip got too hot and stopped itself */
1170         if (inta & CSR_INT_BIT_CT_KILL) {
1171                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1172                 priv->isr_stats.ctkill++;
1173                 handled |= CSR_INT_BIT_CT_KILL;
1174         }
1175
1176         /* Error detected by uCode */
1177         if (inta & CSR_INT_BIT_SW_ERR) {
1178                 IWL_ERR(priv, "Microcode SW error detected. "
1179                         " Restarting 0x%X.\n", inta);
1180                 priv->isr_stats.sw++;
1181                 priv->isr_stats.sw_err = inta;
1182                 iwl_irq_handle_error(priv);
1183                 handled |= CSR_INT_BIT_SW_ERR;
1184         }
1185
1186         /*
1187          * uCode wakes up after power-down sleep.
1188          * Tell device about any new tx or host commands enqueued,
1189          * and about any Rx buffers made available while asleep.
1190          */
1191         if (inta & CSR_INT_BIT_WAKEUP) {
1192                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1193                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1194                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1195                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1196                 priv->isr_stats.wakeup++;
1197                 handled |= CSR_INT_BIT_WAKEUP;
1198         }
1199
1200         /* All uCode command responses, including Tx command responses,
1201          * Rx "responses" (frame-received notification), and other
1202          * notifications from uCode come through here*/
1203         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1204                 iwl_rx_handle(priv);
1205                 priv->isr_stats.rx++;
1206                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1207         }
1208
1209         /* This "Tx" DMA channel is used only for loading uCode */
1210         if (inta & CSR_INT_BIT_FH_TX) {
1211                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1212                 priv->isr_stats.tx++;
1213                 handled |= CSR_INT_BIT_FH_TX;
1214                 /* Wake up uCode load routine, now that load is complete */
1215                 priv->ucode_write_complete = 1;
1216                 wake_up_interruptible(&priv->wait_command_queue);
1217         }
1218
1219         if (inta & ~handled) {
1220                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1221                 priv->isr_stats.unhandled++;
1222         }
1223
1224         if (inta & ~(priv->inta_mask)) {
1225                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1226                          inta & ~priv->inta_mask);
1227                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1228         }
1229
1230         /* Re-enable all interrupts */
1231         /* only Re-enable if diabled by irq */
1232         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1233                 iwl_enable_interrupts(priv);
1234
1235 #ifdef CONFIG_IWLWIFI_DEBUG
1236         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1237                 inta = iwl_read32(priv, CSR_INT);
1238                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1239                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1240                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1241                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1242         }
1243 #endif
1244 }
1245
1246 /* tasklet for iwlagn interrupt */
1247 static void iwl_irq_tasklet(struct iwl_priv *priv)
1248 {
1249         u32 inta = 0;
1250         u32 handled = 0;
1251         unsigned long flags;
1252         u32 i;
1253 #ifdef CONFIG_IWLWIFI_DEBUG
1254         u32 inta_mask;
1255 #endif
1256
1257         spin_lock_irqsave(&priv->lock, flags);
1258
1259         /* Ack/clear/reset pending uCode interrupts.
1260          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1261          */
1262         iwl_write32(priv, CSR_INT, priv->_agn.inta);
1263
1264         inta = priv->_agn.inta;
1265
1266 #ifdef CONFIG_IWLWIFI_DEBUG
1267         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1268                 /* just for debug */
1269                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1270                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1271                                 inta, inta_mask);
1272         }
1273 #endif
1274
1275         spin_unlock_irqrestore(&priv->lock, flags);
1276
1277         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
1278         priv->_agn.inta = 0;
1279
1280         /* Now service all interrupt bits discovered above. */
1281         if (inta & CSR_INT_BIT_HW_ERR) {
1282                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1283
1284                 /* Tell the device to stop sending interrupts */
1285                 iwl_disable_interrupts(priv);
1286
1287                 priv->isr_stats.hw++;
1288                 iwl_irq_handle_error(priv);
1289
1290                 handled |= CSR_INT_BIT_HW_ERR;
1291
1292                 return;
1293         }
1294
1295 #ifdef CONFIG_IWLWIFI_DEBUG
1296         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1297                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1298                 if (inta & CSR_INT_BIT_SCD) {
1299                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1300                                       "the frame/frames.\n");
1301                         priv->isr_stats.sch++;
1302                 }
1303
1304                 /* Alive notification via Rx interrupt will do the real work */
1305                 if (inta & CSR_INT_BIT_ALIVE) {
1306                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1307                         priv->isr_stats.alive++;
1308                 }
1309         }
1310 #endif
1311         /* Safely ignore these bits for debug checks below */
1312         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1313
1314         /* HW RF KILL switch toggled */
1315         if (inta & CSR_INT_BIT_RF_KILL) {
1316                 int hw_rf_kill = 0;
1317                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1318                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1319                         hw_rf_kill = 1;
1320
1321                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1322                                 hw_rf_kill ? "disable radio" : "enable radio");
1323
1324                 priv->isr_stats.rfkill++;
1325
1326                 /* driver only loads ucode once setting the interface up.
1327                  * the driver allows loading the ucode even if the radio
1328                  * is killed. Hence update the killswitch state here. The
1329                  * rfkill handler will care about restarting if needed.
1330                  */
1331                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1332                         if (hw_rf_kill)
1333                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1334                         else
1335                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1336                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1337                 }
1338
1339                 handled |= CSR_INT_BIT_RF_KILL;
1340         }
1341
1342         /* Chip got too hot and stopped itself */
1343         if (inta & CSR_INT_BIT_CT_KILL) {
1344                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1345                 priv->isr_stats.ctkill++;
1346                 handled |= CSR_INT_BIT_CT_KILL;
1347         }
1348
1349         /* Error detected by uCode */
1350         if (inta & CSR_INT_BIT_SW_ERR) {
1351                 IWL_ERR(priv, "Microcode SW error detected. "
1352                         " Restarting 0x%X.\n", inta);
1353                 priv->isr_stats.sw++;
1354                 priv->isr_stats.sw_err = inta;
1355                 iwl_irq_handle_error(priv);
1356                 handled |= CSR_INT_BIT_SW_ERR;
1357         }
1358
1359         /* uCode wakes up after power-down sleep */
1360         if (inta & CSR_INT_BIT_WAKEUP) {
1361                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1362                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1363                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1364                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1365
1366                 priv->isr_stats.wakeup++;
1367
1368                 handled |= CSR_INT_BIT_WAKEUP;
1369         }
1370
1371         /* All uCode command responses, including Tx command responses,
1372          * Rx "responses" (frame-received notification), and other
1373          * notifications from uCode come through here*/
1374         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1375                         CSR_INT_BIT_RX_PERIODIC)) {
1376                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1377                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1378                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1379                         iwl_write32(priv, CSR_FH_INT_STATUS,
1380                                         CSR49_FH_INT_RX_MASK);
1381                 }
1382                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1383                         handled |= CSR_INT_BIT_RX_PERIODIC;
1384                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1385                 }
1386                 /* Sending RX interrupt require many steps to be done in the
1387                  * the device:
1388                  * 1- write interrupt to current index in ICT table.
1389                  * 2- dma RX frame.
1390                  * 3- update RX shared data to indicate last write index.
1391                  * 4- send interrupt.
1392                  * This could lead to RX race, driver could receive RX interrupt
1393                  * but the shared data changes does not reflect this;
1394                  * periodic interrupt will detect any dangling Rx activity.
1395                  */
1396
1397                 /* Disable periodic interrupt; we use it as just a one-shot. */
1398                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1399                             CSR_INT_PERIODIC_DIS);
1400                 iwl_rx_handle(priv);
1401
1402                 /*
1403                  * Enable periodic interrupt in 8 msec only if we received
1404                  * real RX interrupt (instead of just periodic int), to catch
1405                  * any dangling Rx interrupt.  If it was just the periodic
1406                  * interrupt, there was no dangling Rx activity, and no need
1407                  * to extend the periodic interrupt; one-shot is enough.
1408                  */
1409                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1410                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1411                                     CSR_INT_PERIODIC_ENA);
1412
1413                 priv->isr_stats.rx++;
1414         }
1415
1416         /* This "Tx" DMA channel is used only for loading uCode */
1417         if (inta & CSR_INT_BIT_FH_TX) {
1418                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1419                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1420                 priv->isr_stats.tx++;
1421                 handled |= CSR_INT_BIT_FH_TX;
1422                 /* Wake up uCode load routine, now that load is complete */
1423                 priv->ucode_write_complete = 1;
1424                 wake_up_interruptible(&priv->wait_command_queue);
1425         }
1426
1427         if (inta & ~handled) {
1428                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1429                 priv->isr_stats.unhandled++;
1430         }
1431
1432         if (inta & ~(priv->inta_mask)) {
1433                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1434                          inta & ~priv->inta_mask);
1435         }
1436
1437         /* Re-enable all interrupts */
1438         /* only Re-enable if diabled by irq */
1439         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1440                 iwl_enable_interrupts(priv);
1441 }
1442
1443
1444 /******************************************************************************
1445  *
1446  * uCode download functions
1447  *
1448  ******************************************************************************/
1449
1450 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1451 {
1452         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1453         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1454         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1455         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1456         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1457         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1458 }
1459
1460 static void iwl_nic_start(struct iwl_priv *priv)
1461 {
1462         /* Remove all resets to allow NIC to operate */
1463         iwl_write32(priv, CSR_RESET, 0);
1464 }
1465
1466
1467 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1468 static int iwl_mac_setup_register(struct iwl_priv *priv);
1469
1470 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1471 {
1472         const char *name_pre = priv->cfg->fw_name_pre;
1473
1474         if (first)
1475                 priv->fw_index = priv->cfg->ucode_api_max;
1476         else
1477                 priv->fw_index--;
1478
1479         if (priv->fw_index < priv->cfg->ucode_api_min) {
1480                 IWL_ERR(priv, "no suitable firmware found!\n");
1481                 return -ENOENT;
1482         }
1483
1484         sprintf(priv->firmware_name, "%s%d%s",
1485                 name_pre, priv->fw_index, ".ucode");
1486
1487         IWL_DEBUG_INFO(priv, "attempting to load firmware '%s'\n",
1488                        priv->firmware_name);
1489
1490         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1491                                        &priv->pci_dev->dev, GFP_KERNEL, priv,
1492                                        iwl_ucode_callback);
1493 }
1494
1495 /**
1496  * iwl_ucode_callback - callback when firmware was loaded
1497  *
1498  * If loaded successfully, copies the firmware into buffers
1499  * for the card to fetch (via DMA).
1500  */
1501 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1502 {
1503         struct iwl_priv *priv = context;
1504         struct iwl_ucode_header *ucode;
1505         const unsigned int api_max = priv->cfg->ucode_api_max;
1506         const unsigned int api_min = priv->cfg->ucode_api_min;
1507         u8 *src;
1508         size_t len;
1509         u32 api_ver, build;
1510         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1511         int err;
1512         u16 eeprom_ver;
1513
1514         if (!ucode_raw) {
1515                 IWL_ERR(priv, "request for firmware file '%s' failed.\n",
1516                         priv->firmware_name);
1517                 goto try_again;
1518         }
1519
1520         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1521                        priv->firmware_name, ucode_raw->size);
1522
1523         /* Make sure that we got at least the v1 header! */
1524         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1525                 IWL_ERR(priv, "File size way too small!\n");
1526                 goto try_again;
1527         }
1528
1529         /* Data from ucode file:  header followed by uCode images */
1530         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1531
1532         priv->ucode_ver = le32_to_cpu(ucode->ver);
1533         api_ver = IWL_UCODE_API(priv->ucode_ver);
1534         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1535         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1536         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1537         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1538         init_data_size =
1539                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1540         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1541         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1542
1543         /* api_ver should match the api version forming part of the
1544          * firmware filename ... but we don't check for that and only rely
1545          * on the API version read from firmware header from here on forward */
1546
1547         if (api_ver < api_min || api_ver > api_max) {
1548                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1549                           "Driver supports v%u, firmware is v%u.\n",
1550                           api_max, api_ver);
1551                 goto try_again;
1552         }
1553
1554         if (api_ver != api_max)
1555                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1556                           "got v%u. New firmware can be obtained "
1557                           "from http://www.intellinuxwireless.org.\n",
1558                           api_max, api_ver);
1559
1560         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1561                IWL_UCODE_MAJOR(priv->ucode_ver),
1562                IWL_UCODE_MINOR(priv->ucode_ver),
1563                IWL_UCODE_API(priv->ucode_ver),
1564                IWL_UCODE_SERIAL(priv->ucode_ver));
1565
1566         snprintf(priv->hw->wiphy->fw_version,
1567                  sizeof(priv->hw->wiphy->fw_version),
1568                  "%u.%u.%u.%u",
1569                  IWL_UCODE_MAJOR(priv->ucode_ver),
1570                  IWL_UCODE_MINOR(priv->ucode_ver),
1571                  IWL_UCODE_API(priv->ucode_ver),
1572                  IWL_UCODE_SERIAL(priv->ucode_ver));
1573
1574         if (build)
1575                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1576
1577         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1578         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1579                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1580                        ? "OTP" : "EEPROM", eeprom_ver);
1581
1582         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1583                        priv->ucode_ver);
1584         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1585                        inst_size);
1586         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1587                        data_size);
1588         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1589                        init_size);
1590         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1591                        init_data_size);
1592         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1593                        boot_size);
1594
1595         /*
1596          * For any of the failures below (before allocating pci memory)
1597          * we will try to load a version with a smaller API -- maybe the
1598          * user just got a corrupted version of the latest API.
1599          */
1600
1601         /* Verify size of file vs. image size info in file's header */
1602         if (ucode_raw->size !=
1603                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1604                 inst_size + data_size + init_size +
1605                 init_data_size + boot_size) {
1606
1607                 IWL_DEBUG_INFO(priv,
1608                         "uCode file size %d does not match expected size\n",
1609                         (int)ucode_raw->size);
1610                 goto try_again;
1611         }
1612
1613         /* Verify that uCode images will fit in card's SRAM */
1614         if (inst_size > priv->hw_params.max_inst_size) {
1615                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1616                                inst_size);
1617                 goto try_again;
1618         }
1619
1620         if (data_size > priv->hw_params.max_data_size) {
1621                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1622                                 data_size);
1623                 goto try_again;
1624         }
1625         if (init_size > priv->hw_params.max_inst_size) {
1626                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1627                         init_size);
1628                 goto try_again;
1629         }
1630         if (init_data_size > priv->hw_params.max_data_size) {
1631                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1632                       init_data_size);
1633                 goto try_again;
1634         }
1635         if (boot_size > priv->hw_params.max_bsm_size) {
1636                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1637                         boot_size);
1638                 goto try_again;
1639         }
1640
1641         /* Allocate ucode buffers for card's bus-master loading ... */
1642
1643         /* Runtime instructions and 2 copies of data:
1644          * 1) unmodified from disk
1645          * 2) backup cache for save/restore during power-downs */
1646         priv->ucode_code.len = inst_size;
1647         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1648
1649         priv->ucode_data.len = data_size;
1650         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1651
1652         priv->ucode_data_backup.len = data_size;
1653         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1654
1655         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1656             !priv->ucode_data_backup.v_addr)
1657                 goto err_pci_alloc;
1658
1659         /* Initialization instructions and data */
1660         if (init_size && init_data_size) {
1661                 priv->ucode_init.len = init_size;
1662                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1663
1664                 priv->ucode_init_data.len = init_data_size;
1665                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1666
1667                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1668                         goto err_pci_alloc;
1669         }
1670
1671         /* Bootstrap (instructions only, no data) */
1672         if (boot_size) {
1673                 priv->ucode_boot.len = boot_size;
1674                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1675
1676                 if (!priv->ucode_boot.v_addr)
1677                         goto err_pci_alloc;
1678         }
1679
1680         /* Copy images into buffers for card's bus-master reads ... */
1681
1682         /* Runtime instructions (first block of data in file) */
1683         len = inst_size;
1684         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1685         memcpy(priv->ucode_code.v_addr, src, len);
1686         src += len;
1687
1688         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1689                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1690
1691         /* Runtime data (2nd block)
1692          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1693         len = data_size;
1694         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1695         memcpy(priv->ucode_data.v_addr, src, len);
1696         memcpy(priv->ucode_data_backup.v_addr, src, len);
1697         src += len;
1698
1699         /* Initialization instructions (3rd block) */
1700         if (init_size) {
1701                 len = init_size;
1702                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1703                                 len);
1704                 memcpy(priv->ucode_init.v_addr, src, len);
1705                 src += len;
1706         }
1707
1708         /* Initialization data (4th block) */
1709         if (init_data_size) {
1710                 len = init_data_size;
1711                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1712                                len);
1713                 memcpy(priv->ucode_init_data.v_addr, src, len);
1714                 src += len;
1715         }
1716
1717         /* Bootstrap instructions (5th block) */
1718         len = boot_size;
1719         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1720         memcpy(priv->ucode_boot.v_addr, src, len);
1721
1722         /**************************************************
1723          * This is still part of probe() in a sense...
1724          *
1725          * 9. Setup and register with mac80211 and debugfs
1726          **************************************************/
1727         err = iwl_mac_setup_register(priv);
1728         if (err)
1729                 goto out_unbind;
1730
1731         err = iwl_dbgfs_register(priv, DRV_NAME);
1732         if (err)
1733                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1734
1735         /* We have our copies now, allow OS release its copies */
1736         release_firmware(ucode_raw);
1737         return;
1738
1739  try_again:
1740         /* try next, if any */
1741         if (iwl_request_firmware(priv, false))
1742                 goto out_unbind;
1743         release_firmware(ucode_raw);
1744         return;
1745
1746  err_pci_alloc:
1747         IWL_ERR(priv, "failed to allocate pci memory\n");
1748         iwl_dealloc_ucode_pci(priv);
1749  out_unbind:
1750         device_release_driver(&priv->pci_dev->dev);
1751         release_firmware(ucode_raw);
1752 }
1753
1754 static const char *desc_lookup_text[] = {
1755         "OK",
1756         "FAIL",
1757         "BAD_PARAM",
1758         "BAD_CHECKSUM",
1759         "NMI_INTERRUPT_WDG",
1760         "SYSASSERT",
1761         "FATAL_ERROR",
1762         "BAD_COMMAND",
1763         "HW_ERROR_TUNE_LOCK",
1764         "HW_ERROR_TEMPERATURE",
1765         "ILLEGAL_CHAN_FREQ",
1766         "VCC_NOT_STABLE",
1767         "FH_ERROR",
1768         "NMI_INTERRUPT_HOST",
1769         "NMI_INTERRUPT_ACTION_PT",
1770         "NMI_INTERRUPT_UNKNOWN",
1771         "UCODE_VERSION_MISMATCH",
1772         "HW_ERROR_ABS_LOCK",
1773         "HW_ERROR_CAL_LOCK_FAIL",
1774         "NMI_INTERRUPT_INST_ACTION_PT",
1775         "NMI_INTERRUPT_DATA_ACTION_PT",
1776         "NMI_TRM_HW_ER",
1777         "NMI_INTERRUPT_TRM",
1778         "NMI_INTERRUPT_BREAK_POINT"
1779         "DEBUG_0",
1780         "DEBUG_1",
1781         "DEBUG_2",
1782         "DEBUG_3",
1783         "ADVANCED SYSASSERT"
1784 };
1785
1786 static const char *desc_lookup(int i)
1787 {
1788         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1789
1790         if (i < 0 || i > max)
1791                 i = max;
1792
1793         return desc_lookup_text[i];
1794 }
1795
1796 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1797 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1798
1799 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1800 {
1801         u32 data2, line;
1802         u32 desc, time, count, base, data1;
1803         u32 blink1, blink2, ilink1, ilink2;
1804
1805         if (priv->ucode_type == UCODE_INIT)
1806                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1807         else
1808                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1809
1810         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1811                 IWL_ERR(priv,
1812                         "Not valid error log pointer 0x%08X for %s uCode\n",
1813                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1814                 return;
1815         }
1816
1817         count = iwl_read_targ_mem(priv, base);
1818
1819         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1820                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1821                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1822                         priv->status, count);
1823         }
1824
1825         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1826         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1827         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1828         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1829         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1830         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1831         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1832         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1833         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1834
1835         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1836                                       blink1, blink2, ilink1, ilink2);
1837
1838         IWL_ERR(priv, "Desc                               Time       "
1839                 "data1      data2      line\n");
1840         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1841                 desc_lookup(desc), desc, time, data1, data2, line);
1842         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1843         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1844                 ilink1, ilink2);
1845
1846 }
1847
1848 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1849
1850 /**
1851  * iwl_print_event_log - Dump error event log to syslog
1852  *
1853  */
1854 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1855                                u32 num_events, u32 mode,
1856                                int pos, char **buf, size_t bufsz)
1857 {
1858         u32 i;
1859         u32 base;       /* SRAM byte address of event log header */
1860         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1861         u32 ptr;        /* SRAM byte address of log data */
1862         u32 ev, time, data; /* event log data */
1863         unsigned long reg_flags;
1864
1865         if (num_events == 0)
1866                 return pos;
1867         if (priv->ucode_type == UCODE_INIT)
1868                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1869         else
1870                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1871
1872         if (mode == 0)
1873                 event_size = 2 * sizeof(u32);
1874         else
1875                 event_size = 3 * sizeof(u32);
1876
1877         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1878
1879         /* Make sure device is powered up for SRAM reads */
1880         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1881         iwl_grab_nic_access(priv);
1882
1883         /* Set starting address; reads will auto-increment */
1884         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1885         rmb();
1886
1887         /* "time" is actually "data" for mode 0 (no timestamp).
1888         * place event id # at far right for easier visual parsing. */
1889         for (i = 0; i < num_events; i++) {
1890                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1891                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1892                 if (mode == 0) {
1893                         /* data, ev */
1894                         if (bufsz) {
1895                                 pos += scnprintf(*buf + pos, bufsz - pos,
1896                                                 "EVT_LOG:0x%08x:%04u\n",
1897                                                 time, ev);
1898                         } else {
1899                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1900                                         time, ev);
1901                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1902                                         time, ev);
1903                         }
1904                 } else {
1905                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1906                         if (bufsz) {
1907                                 pos += scnprintf(*buf + pos, bufsz - pos,
1908                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1909                                                  time, data, ev);
1910                         } else {
1911                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1912                                         time, data, ev);
1913                                 trace_iwlwifi_dev_ucode_event(priv, time,
1914                                         data, ev);
1915                         }
1916                 }
1917         }
1918
1919         /* Allow device to power down */
1920         iwl_release_nic_access(priv);
1921         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1922         return pos;
1923 }
1924
1925 /**
1926  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1927  */
1928 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1929                                     u32 num_wraps, u32 next_entry,
1930                                     u32 size, u32 mode,
1931                                     int pos, char **buf, size_t bufsz)
1932 {
1933         /*
1934          * display the newest DEFAULT_LOG_ENTRIES entries
1935          * i.e the entries just before the next ont that uCode would fill.
1936          */
1937         if (num_wraps) {
1938                 if (next_entry < size) {
1939                         pos = iwl_print_event_log(priv,
1940                                                 capacity - (size - next_entry),
1941                                                 size - next_entry, mode,
1942                                                 pos, buf, bufsz);
1943                         pos = iwl_print_event_log(priv, 0,
1944                                                   next_entry, mode,
1945                                                   pos, buf, bufsz);
1946                 } else
1947                         pos = iwl_print_event_log(priv, next_entry - size,
1948                                                   size, mode, pos, buf, bufsz);
1949         } else {
1950                 if (next_entry < size) {
1951                         pos = iwl_print_event_log(priv, 0, next_entry,
1952                                                   mode, pos, buf, bufsz);
1953                 } else {
1954                         pos = iwl_print_event_log(priv, next_entry - size,
1955                                                   size, mode, pos, buf, bufsz);
1956                 }
1957         }
1958         return pos;
1959 }
1960
1961 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1962 #define MAX_EVENT_LOG_SIZE (512)
1963
1964 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1965
1966 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1967                             char **buf, bool display)
1968 {
1969         u32 base;       /* SRAM byte address of event log header */
1970         u32 capacity;   /* event log capacity in # entries */
1971         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1972         u32 num_wraps;  /* # times uCode wrapped to top of log */
1973         u32 next_entry; /* index of next entry to be written by uCode */
1974         u32 size;       /* # entries that we'll print */
1975         int pos = 0;
1976         size_t bufsz = 0;
1977
1978         if (priv->ucode_type == UCODE_INIT)
1979                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1980         else
1981                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1982
1983         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1984                 IWL_ERR(priv,
1985                         "Invalid event log pointer 0x%08X for %s uCode\n",
1986                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1987                 return -EINVAL;
1988         }
1989
1990         /* event log header */
1991         capacity = iwl_read_targ_mem(priv, base);
1992         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1993         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1994         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1995
1996         if (capacity > MAX_EVENT_LOG_SIZE) {
1997                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1998                         capacity, MAX_EVENT_LOG_SIZE);
1999                 capacity = MAX_EVENT_LOG_SIZE;
2000         }
2001
2002         if (next_entry > MAX_EVENT_LOG_SIZE) {
2003                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
2004                         next_entry, MAX_EVENT_LOG_SIZE);
2005                 next_entry = MAX_EVENT_LOG_SIZE;
2006         }
2007
2008         size = num_wraps ? capacity : next_entry;
2009
2010         /* bail out if nothing in log */
2011         if (size == 0) {
2012                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2013                 return pos;
2014         }
2015
2016 #ifdef CONFIG_IWLWIFI_DEBUG
2017         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
2018                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2019                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2020 #else
2021         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2022                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2023 #endif
2024         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2025                 size);
2026
2027 #ifdef CONFIG_IWLWIFI_DEBUG
2028         if (display) {
2029                 if (full_log)
2030                         bufsz = capacity * 48;
2031                 else
2032                         bufsz = size * 48;
2033                 *buf = kmalloc(bufsz, GFP_KERNEL);
2034                 if (!*buf)
2035                         return -ENOMEM;
2036         }
2037         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2038                 /*
2039                  * if uCode has wrapped back to top of log,
2040                  * start at the oldest entry,
2041                  * i.e the next one that uCode would fill.
2042                  */
2043                 if (num_wraps)
2044                         pos = iwl_print_event_log(priv, next_entry,
2045                                                 capacity - next_entry, mode,
2046                                                 pos, buf, bufsz);
2047                 /* (then/else) start at top of log */
2048                 pos = iwl_print_event_log(priv, 0,
2049                                           next_entry, mode, pos, buf, bufsz);
2050         } else
2051                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2052                                                 next_entry, size, mode,
2053                                                 pos, buf, bufsz);
2054 #else
2055         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2056                                         next_entry, size, mode,
2057                                         pos, buf, bufsz);
2058 #endif
2059         return pos;
2060 }
2061
2062 /**
2063  * iwl_alive_start - called after REPLY_ALIVE notification received
2064  *                   from protocol/runtime uCode (initialization uCode's
2065  *                   Alive gets handled by iwl_init_alive_start()).
2066  */
2067 static void iwl_alive_start(struct iwl_priv *priv)
2068 {
2069         int ret = 0;
2070
2071         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2072
2073         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2074                 /* We had an error bringing up the hardware, so take it
2075                  * all the way back down so we can try again */
2076                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2077                 goto restart;
2078         }
2079
2080         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2081          * This is a paranoid check, because we would not have gotten the
2082          * "runtime" alive if code weren't properly loaded.  */
2083         if (iwl_verify_ucode(priv)) {
2084                 /* Runtime instruction load was bad;
2085                  * take it all the way back down so we can try again */
2086                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2087                 goto restart;
2088         }
2089
2090         iwl_clear_stations_table(priv);
2091         ret = priv->cfg->ops->lib->alive_notify(priv);
2092         if (ret) {
2093                 IWL_WARN(priv,
2094                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
2095                 goto restart;
2096         }
2097
2098         /* After the ALIVE response, we can send host commands to the uCode */
2099         set_bit(STATUS_ALIVE, &priv->status);
2100
2101         if (iwl_is_rfkill(priv))
2102                 return;
2103
2104         ieee80211_wake_queues(priv->hw);
2105
2106         priv->active_rate = IWL_RATES_MASK;
2107
2108         /* Configure Tx antenna selection based on H/W config */
2109         if (priv->cfg->ops->hcmd->set_tx_ant)
2110                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2111
2112         if (iwl_is_associated(priv)) {
2113                 struct iwl_rxon_cmd *active_rxon =
2114                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
2115                 /* apply any changes in staging */
2116                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2117                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2118         } else {
2119                 /* Initialize our rx_config data */
2120                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2121
2122                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2123                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2124
2125                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2126         }
2127
2128         /* Configure Bluetooth device coexistence support */
2129         iwl_send_bt_config(priv);
2130
2131         iwl_reset_run_time_calib(priv);
2132
2133         /* Configure the adapter for unassociated operation */
2134         iwlcore_commit_rxon(priv);
2135
2136         /* At this point, the NIC is initialized and operational */
2137         iwl_rf_kill_ct_config(priv);
2138
2139         iwl_leds_init(priv);
2140
2141         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2142         set_bit(STATUS_READY, &priv->status);
2143         wake_up_interruptible(&priv->wait_command_queue);
2144
2145         iwl_power_update_mode(priv, true);
2146
2147         return;
2148
2149  restart:
2150         queue_work(priv->workqueue, &priv->restart);
2151 }
2152
2153 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2154
2155 static void __iwl_down(struct iwl_priv *priv)
2156 {
2157         unsigned long flags;
2158         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2159
2160         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2161
2162         if (!exit_pending)
2163                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2164
2165         iwl_clear_stations_table(priv);
2166
2167         /* Unblock any waiting calls */
2168         wake_up_interruptible_all(&priv->wait_command_queue);
2169
2170         /* Wipe out the EXIT_PENDING status bit if we are not actually
2171          * exiting the module */
2172         if (!exit_pending)
2173                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2174
2175         /* stop and reset the on-board processor */
2176         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2177
2178         /* tell the device to stop sending interrupts */
2179         spin_lock_irqsave(&priv->lock, flags);
2180         iwl_disable_interrupts(priv);
2181         spin_unlock_irqrestore(&priv->lock, flags);
2182         iwl_synchronize_irq(priv);
2183
2184         if (priv->mac80211_registered)
2185                 ieee80211_stop_queues(priv->hw);
2186
2187         /* If we have not previously called iwl_init() then
2188          * clear all bits but the RF Kill bit and return */
2189         if (!iwl_is_init(priv)) {
2190                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2191                                         STATUS_RF_KILL_HW |
2192                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2193                                         STATUS_GEO_CONFIGURED |
2194                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2195                                         STATUS_EXIT_PENDING;
2196                 goto exit;
2197         }
2198
2199         /* ...otherwise clear out all the status bits but the RF Kill
2200          * bit and continue taking the NIC down. */
2201         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2202                                 STATUS_RF_KILL_HW |
2203                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2204                                 STATUS_GEO_CONFIGURED |
2205                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2206                                 STATUS_FW_ERROR |
2207                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2208                                 STATUS_EXIT_PENDING;
2209
2210         /* device going down, Stop using ICT table */
2211         iwl_disable_ict(priv);
2212
2213         iwl_txq_ctx_stop(priv);
2214         iwl_rxq_stop(priv);
2215
2216         /* Power-down device's busmaster DMA clocks */
2217         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2218         udelay(5);
2219
2220         /* Make sure (redundant) we've released our request to stay awake */
2221         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2222
2223         /* Stop the device, and put it in low power state */
2224         priv->cfg->ops->lib->apm_ops.stop(priv);
2225
2226  exit:
2227         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2228
2229         if (priv->ibss_beacon)
2230                 dev_kfree_skb(priv->ibss_beacon);
2231         priv->ibss_beacon = NULL;
2232
2233         /* clear out any free frames */
2234         iwl_clear_free_frames(priv);
2235 }
2236
2237 static void iwl_down(struct iwl_priv *priv)
2238 {
2239         mutex_lock(&priv->mutex);
2240         __iwl_down(priv);
2241         mutex_unlock(&priv->mutex);
2242
2243         iwl_cancel_deferred_work(priv);
2244 }
2245
2246 #define HW_READY_TIMEOUT (50)
2247
2248 static int iwl_set_hw_ready(struct iwl_priv *priv)
2249 {
2250         int ret = 0;
2251
2252         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2253                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2254
2255         /* See if we got it */
2256         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2257                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2258                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2259                                 HW_READY_TIMEOUT);
2260         if (ret != -ETIMEDOUT)
2261                 priv->hw_ready = true;
2262         else
2263                 priv->hw_ready = false;
2264
2265         IWL_DEBUG_INFO(priv, "hardware %s\n",
2266                       (priv->hw_ready == 1) ? "ready" : "not ready");
2267         return ret;
2268 }
2269
2270 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2271 {
2272         int ret = 0;
2273
2274         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2275
2276         ret = iwl_set_hw_ready(priv);
2277         if (priv->hw_ready)
2278                 return ret;
2279
2280         /* If HW is not ready, prepare the conditions to check again */
2281         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2282                         CSR_HW_IF_CONFIG_REG_PREPARE);
2283
2284         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2285                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2286                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2287
2288         /* HW should be ready by now, check again. */
2289         if (ret != -ETIMEDOUT)
2290                 iwl_set_hw_ready(priv);
2291
2292         return ret;
2293 }
2294
2295 #define MAX_HW_RESTARTS 5
2296
2297 static int __iwl_up(struct iwl_priv *priv)
2298 {
2299         int i;
2300         int ret;
2301
2302         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2303                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2304                 return -EIO;
2305         }
2306
2307         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2308                 IWL_ERR(priv, "ucode not available for device bringup\n");
2309                 return -EIO;
2310         }
2311
2312         iwl_prepare_card_hw(priv);
2313
2314         if (!priv->hw_ready) {
2315                 IWL_WARN(priv, "Exit HW not ready\n");
2316                 return -EIO;
2317         }
2318
2319         /* If platform's RF_KILL switch is NOT set to KILL */
2320         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2321                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2322         else
2323                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2324
2325         if (iwl_is_rfkill(priv)) {
2326                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2327
2328                 iwl_enable_interrupts(priv);
2329                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2330                 return 0;
2331         }
2332
2333         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2334
2335         ret = iwl_hw_nic_init(priv);
2336         if (ret) {
2337                 IWL_ERR(priv, "Unable to init nic\n");
2338                 return ret;
2339         }
2340
2341         /* make sure rfkill handshake bits are cleared */
2342         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2343         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2344                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2345
2346         /* clear (again), then enable host interrupts */
2347         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2348         iwl_enable_interrupts(priv);
2349
2350         /* really make sure rfkill handshake bits are cleared */
2351         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2352         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2353
2354         /* Copy original ucode data image from disk into backup cache.
2355          * This will be used to initialize the on-board processor's
2356          * data SRAM for a clean start when the runtime program first loads. */
2357         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2358                priv->ucode_data.len);
2359
2360         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2361
2362                 iwl_clear_stations_table(priv);
2363
2364                 /* load bootstrap state machine,
2365                  * load bootstrap program into processor's memory,
2366                  * prepare to load the "initialize" uCode */
2367                 ret = priv->cfg->ops->lib->load_ucode(priv);
2368
2369                 if (ret) {
2370                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2371                                 ret);
2372                         continue;
2373                 }
2374
2375                 /* start card; "initialize" will load runtime ucode */
2376                 iwl_nic_start(priv);
2377
2378                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2379
2380                 return 0;
2381         }
2382
2383         set_bit(STATUS_EXIT_PENDING, &priv->status);
2384         __iwl_down(priv);
2385         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2386
2387         /* tried to restart and config the device for as long as our
2388          * patience could withstand */
2389         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2390         return -EIO;
2391 }
2392
2393
2394 /*****************************************************************************
2395  *
2396  * Workqueue callbacks
2397  *
2398  *****************************************************************************/
2399
2400 static void iwl_bg_init_alive_start(struct work_struct *data)
2401 {
2402         struct iwl_priv *priv =
2403             container_of(data, struct iwl_priv, init_alive_start.work);
2404
2405         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2406                 return;
2407
2408         mutex_lock(&priv->mutex);
2409         priv->cfg->ops->lib->init_alive_start(priv);
2410         mutex_unlock(&priv->mutex);
2411 }
2412
2413 static void iwl_bg_alive_start(struct work_struct *data)
2414 {
2415         struct iwl_priv *priv =
2416             container_of(data, struct iwl_priv, alive_start.work);
2417
2418         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2419                 return;
2420
2421         /* enable dram interrupt */
2422         iwl_reset_ict(priv);
2423
2424         mutex_lock(&priv->mutex);
2425         iwl_alive_start(priv);
2426         mutex_unlock(&priv->mutex);
2427 }
2428
2429 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2430 {
2431         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2432                         run_time_calib_work);
2433
2434         mutex_lock(&priv->mutex);
2435
2436         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2437             test_bit(STATUS_SCANNING, &priv->status)) {
2438                 mutex_unlock(&priv->mutex);
2439                 return;
2440         }
2441
2442         if (priv->start_calib) {
2443                 iwl_chain_noise_calibration(priv, &priv->statistics);
2444
2445                 iwl_sensitivity_calibration(priv, &priv->statistics);
2446         }
2447
2448         mutex_unlock(&priv->mutex);
2449         return;
2450 }
2451
2452 static void iwl_bg_restart(struct work_struct *data)
2453 {
2454         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2455
2456         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2457                 return;
2458
2459         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2460                 mutex_lock(&priv->mutex);
2461                 priv->vif = NULL;
2462                 priv->is_open = 0;
2463                 mutex_unlock(&priv->mutex);
2464                 iwl_down(priv);
2465                 ieee80211_restart_hw(priv->hw);
2466         } else {
2467                 iwl_down(priv);
2468
2469                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2470                         return;
2471
2472                 mutex_lock(&priv->mutex);
2473                 __iwl_up(priv);
2474                 mutex_unlock(&priv->mutex);
2475         }
2476 }
2477
2478 static void iwl_bg_rx_replenish(struct work_struct *data)
2479 {
2480         struct iwl_priv *priv =
2481             container_of(data, struct iwl_priv, rx_replenish);
2482
2483         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2484                 return;
2485
2486         mutex_lock(&priv->mutex);
2487         iwl_rx_replenish(priv);
2488         mutex_unlock(&priv->mutex);
2489 }
2490
2491 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2492
2493 void iwl_post_associate(struct iwl_priv *priv)
2494 {
2495         struct ieee80211_conf *conf = NULL;
2496         int ret = 0;
2497         unsigned long flags;
2498
2499         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2500                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2501                 return;
2502         }
2503
2504         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2505                         priv->assoc_id, priv->active_rxon.bssid_addr);
2506
2507
2508         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2509                 return;
2510
2511
2512         if (!priv->vif || !priv->is_open)
2513                 return;
2514
2515         iwl_scan_cancel_timeout(priv, 200);
2516
2517         conf = ieee80211_get_hw_conf(priv->hw);
2518
2519         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2520         iwlcore_commit_rxon(priv);
2521
2522         iwl_setup_rxon_timing(priv);
2523         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2524                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2525         if (ret)
2526                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2527                             "Attempting to continue.\n");
2528
2529         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2530
2531         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2532
2533         if (priv->cfg->ops->hcmd->set_rxon_chain)
2534                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2535
2536         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2537
2538         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2539                         priv->assoc_id, priv->beacon_int);
2540
2541         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2542                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2543         else
2544                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2545
2546         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2547                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2548                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2549                 else
2550                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2551
2552                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2553                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2554
2555         }
2556
2557         iwlcore_commit_rxon(priv);
2558
2559         switch (priv->iw_mode) {
2560         case NL80211_IFTYPE_STATION:
2561                 break;
2562
2563         case NL80211_IFTYPE_ADHOC:
2564
2565                 /* assume default assoc id */
2566                 priv->assoc_id = 1;
2567
2568                 iwl_rxon_add_station(priv, priv->bssid, 0);
2569                 iwl_send_beacon_cmd(priv);
2570
2571                 break;
2572
2573         default:
2574                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2575                           __func__, priv->iw_mode);
2576                 break;
2577         }
2578
2579         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2580                 priv->assoc_station_added = 1;
2581
2582         spin_lock_irqsave(&priv->lock, flags);
2583         iwl_activate_qos(priv, 0);
2584         spin_unlock_irqrestore(&priv->lock, flags);
2585
2586         /* the chain noise calibration will enabled PM upon completion
2587          * If chain noise has already been run, then we need to enable
2588          * power management here */
2589         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2590                 iwl_power_update_mode(priv, false);
2591
2592         /* Enable Rx differential gain and sensitivity calibrations */
2593         iwl_chain_noise_reset(priv);
2594         priv->start_calib = 1;
2595
2596 }
2597
2598 /*****************************************************************************
2599  *
2600  * mac80211 entry point functions
2601  *
2602  *****************************************************************************/
2603
2604 #define UCODE_READY_TIMEOUT     (4 * HZ)
2605
2606 /*
2607  * Not a mac80211 entry point function, but it fits in with all the
2608  * other mac80211 functions grouped here.
2609  */
2610 static int iwl_mac_setup_register(struct iwl_priv *priv)
2611 {
2612         int ret;
2613         struct ieee80211_hw *hw = priv->hw;
2614         hw->rate_control_algorithm = "iwl-agn-rs";
2615
2616         /* Tell mac80211 our characteristics */
2617         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2618                     IEEE80211_HW_NOISE_DBM |
2619                     IEEE80211_HW_AMPDU_AGGREGATION |
2620                     IEEE80211_HW_SPECTRUM_MGMT;
2621
2622         if (!priv->cfg->broken_powersave)
2623                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2624                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2625
2626         if (priv->cfg->sku & IWL_SKU_N)
2627                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2628                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2629
2630         hw->sta_data_size = sizeof(struct iwl_station_priv);
2631         hw->wiphy->interface_modes =
2632                 BIT(NL80211_IFTYPE_STATION) |
2633                 BIT(NL80211_IFTYPE_ADHOC);
2634
2635         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
2636                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
2637
2638         /*
2639          * For now, disable PS by default because it affects
2640          * RX performance significantly.
2641          */
2642         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2643
2644         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2645         /* we create the 802.11 header and a zero-length SSID element */
2646         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2647
2648         /* Default value; 4 EDCA QOS priorities */
2649         hw->queues = 4;
2650
2651         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2652
2653         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2654                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2655                         &priv->bands[IEEE80211_BAND_2GHZ];
2656         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2657                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2658                         &priv->bands[IEEE80211_BAND_5GHZ];
2659
2660         ret = ieee80211_register_hw(priv->hw);
2661         if (ret) {
2662                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2663                 return ret;
2664         }
2665         priv->mac80211_registered = 1;
2666
2667         return 0;
2668 }
2669
2670
2671 static int iwl_mac_start(struct ieee80211_hw *hw)
2672 {
2673         struct iwl_priv *priv = hw->priv;
2674         int ret;
2675
2676         IWL_DEBUG_MAC80211(priv, "enter\n");
2677
2678         /* we should be verifying the device is ready to be opened */
2679         mutex_lock(&priv->mutex);
2680         ret = __iwl_up(priv);
2681         mutex_unlock(&priv->mutex);
2682
2683         if (ret)
2684                 return ret;
2685
2686         if (iwl_is_rfkill(priv))
2687                 goto out;
2688
2689         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2690
2691         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2692          * mac80211 will not be run successfully. */
2693         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2694                         test_bit(STATUS_READY, &priv->status),
2695                         UCODE_READY_TIMEOUT);
2696         if (!ret) {
2697                 if (!test_bit(STATUS_READY, &priv->status)) {
2698                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2699                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2700                         return -ETIMEDOUT;
2701                 }
2702         }
2703
2704         iwl_led_start(priv);
2705
2706 out:
2707         priv->is_open = 1;
2708         IWL_DEBUG_MAC80211(priv, "leave\n");
2709         return 0;
2710 }
2711
2712 static void iwl_mac_stop(struct ieee80211_hw *hw)
2713 {
2714         struct iwl_priv *priv = hw->priv;
2715
2716         IWL_DEBUG_MAC80211(priv, "enter\n");
2717
2718         if (!priv->is_open)
2719                 return;
2720
2721         priv->is_open = 0;
2722
2723         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2724                 /* stop mac, cancel any scan request and clear
2725                  * RXON_FILTER_ASSOC_MSK BIT
2726                  */
2727                 mutex_lock(&priv->mutex);
2728                 iwl_scan_cancel_timeout(priv, 100);
2729                 mutex_unlock(&priv->mutex);
2730         }
2731
2732         iwl_down(priv);
2733
2734         flush_workqueue(priv->workqueue);
2735
2736         /* enable interrupts again in order to receive rfkill changes */
2737         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2738         iwl_enable_interrupts(priv);
2739
2740         IWL_DEBUG_MAC80211(priv, "leave\n");
2741 }
2742
2743 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2744 {
2745         struct iwl_priv *priv = hw->priv;
2746
2747         IWL_DEBUG_MACDUMP(priv, "enter\n");
2748
2749         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2750                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2751
2752         if (iwl_tx_skb(priv, skb))
2753                 dev_kfree_skb_any(skb);
2754
2755         IWL_DEBUG_MACDUMP(priv, "leave\n");
2756         return NETDEV_TX_OK;
2757 }
2758
2759 void iwl_config_ap(struct iwl_priv *priv)
2760 {
2761         int ret = 0;
2762         unsigned long flags;
2763
2764         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2765                 return;
2766
2767         /* The following should be done only at AP bring up */
2768         if (!iwl_is_associated(priv)) {
2769
2770                 /* RXON - unassoc (to set timing command) */
2771                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2772                 iwlcore_commit_rxon(priv);
2773
2774                 /* RXON Timing */
2775                 iwl_setup_rxon_timing(priv);
2776                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2777                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2778                 if (ret)
2779                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2780                                         "Attempting to continue.\n");
2781
2782                 /* AP has all antennas */
2783                 priv->chain_noise_data.active_chains =
2784                         priv->hw_params.valid_rx_ant;
2785                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2786                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2787                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2788
2789                 /* FIXME: what should be the assoc_id for AP? */
2790                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2791                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2792                         priv->staging_rxon.flags |=
2793                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2794                 else
2795                         priv->staging_rxon.flags &=
2796                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2797
2798                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2799                         if (priv->assoc_capability &
2800                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2801                                 priv->staging_rxon.flags |=
2802                                         RXON_FLG_SHORT_SLOT_MSK;
2803                         else
2804                                 priv->staging_rxon.flags &=
2805                                         ~RXON_FLG_SHORT_SLOT_MSK;
2806
2807                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2808                                 priv->staging_rxon.flags &=
2809                                         ~RXON_FLG_SHORT_SLOT_MSK;
2810                 }
2811                 /* restore RXON assoc */
2812                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2813                 iwlcore_commit_rxon(priv);
2814                 iwl_reset_qos(priv);
2815                 spin_lock_irqsave(&priv->lock, flags);
2816                 iwl_activate_qos(priv, 1);
2817                 spin_unlock_irqrestore(&priv->lock, flags);
2818                 iwl_add_bcast_station(priv);
2819         }
2820         iwl_send_beacon_cmd(priv);
2821
2822         /* FIXME - we need to add code here to detect a totally new
2823          * configuration, reset the AP, unassoc, rxon timing, assoc,
2824          * clear sta table, add BCAST sta... */
2825 }
2826
2827 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2828                                     struct ieee80211_vif *vif,
2829                                     struct ieee80211_key_conf *keyconf,
2830                                     struct ieee80211_sta *sta,
2831                                     u32 iv32, u16 *phase1key)
2832 {
2833
2834         struct iwl_priv *priv = hw->priv;
2835         IWL_DEBUG_MAC80211(priv, "enter\n");
2836
2837         iwl_update_tkip_key(priv, keyconf,
2838                             sta ? sta->addr : iwl_bcast_addr,
2839                             iv32, phase1key);
2840
2841         IWL_DEBUG_MAC80211(priv, "leave\n");
2842 }
2843
2844 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2845                            struct ieee80211_vif *vif,
2846                            struct ieee80211_sta *sta,
2847                            struct ieee80211_key_conf *key)
2848 {
2849         struct iwl_priv *priv = hw->priv;
2850         const u8 *addr;
2851         int ret;
2852         u8 sta_id;
2853         bool is_default_wep_key = false;
2854
2855         IWL_DEBUG_MAC80211(priv, "enter\n");
2856
2857         if (priv->cfg->mod_params->sw_crypto) {
2858                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2859                 return -EOPNOTSUPP;
2860         }
2861         addr = sta ? sta->addr : iwl_bcast_addr;
2862         sta_id = iwl_find_station(priv, addr);
2863         if (sta_id == IWL_INVALID_STATION) {
2864                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2865                                    addr);
2866                 return -EINVAL;
2867
2868         }
2869
2870         mutex_lock(&priv->mutex);
2871         iwl_scan_cancel_timeout(priv, 100);
2872
2873         /* If we are getting WEP group key and we didn't receive any key mapping
2874          * so far, we are in legacy wep mode (group key only), otherwise we are
2875          * in 1X mode.
2876          * In legacy wep mode, we use another host command to the uCode */
2877         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2878                 priv->iw_mode != NL80211_IFTYPE_AP) {
2879                 if (cmd == SET_KEY)
2880                         is_default_wep_key = !priv->key_mapping_key;
2881                 else
2882                         is_default_wep_key =
2883                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2884         }
2885
2886         switch (cmd) {
2887         case SET_KEY:
2888                 if (is_default_wep_key)
2889                         ret = iwl_set_default_wep_key(priv, key);
2890                 else
2891                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2892
2893                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2894                 break;
2895         case DISABLE_KEY:
2896                 if (is_default_wep_key)
2897                         ret = iwl_remove_default_wep_key(priv, key);
2898                 else
2899                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2900
2901                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2902                 break;
2903         default:
2904                 ret = -EINVAL;
2905         }
2906
2907         mutex_unlock(&priv->mutex);
2908         IWL_DEBUG_MAC80211(priv, "leave\n");
2909
2910         return ret;
2911 }
2912
2913 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2914                                 struct ieee80211_vif *vif,
2915                              enum ieee80211_ampdu_mlme_action action,
2916                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2917 {
2918         struct iwl_priv *priv = hw->priv;
2919         int ret;
2920
2921         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2922                      sta->addr, tid);
2923
2924         if (!(priv->cfg->sku & IWL_SKU_N))
2925                 return -EACCES;
2926
2927         switch (action) {
2928         case IEEE80211_AMPDU_RX_START:
2929                 IWL_DEBUG_HT(priv, "start Rx\n");
2930                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2931         case IEEE80211_AMPDU_RX_STOP:
2932                 IWL_DEBUG_HT(priv, "stop Rx\n");
2933                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2934                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2935                         return 0;
2936                 else
2937                         return ret;
2938         case IEEE80211_AMPDU_TX_START:
2939                 IWL_DEBUG_HT(priv, "start Tx\n");
2940                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2941         case IEEE80211_AMPDU_TX_STOP:
2942                 IWL_DEBUG_HT(priv, "stop Tx\n");
2943                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2944                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2945                         return 0;
2946                 else
2947                         return ret;
2948         case IEEE80211_AMPDU_TX_OPERATIONAL:
2949                 /* do nothing */
2950                 return -EOPNOTSUPP;
2951         default:
2952                 IWL_DEBUG_HT(priv, "unknown\n");
2953                 return -EINVAL;
2954                 break;
2955         }
2956         return 0;
2957 }
2958
2959 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2960                              struct ieee80211_low_level_stats *stats)
2961 {
2962         struct iwl_priv *priv = hw->priv;
2963
2964         priv = hw->priv;
2965         IWL_DEBUG_MAC80211(priv, "enter\n");
2966         IWL_DEBUG_MAC80211(priv, "leave\n");
2967
2968         return 0;
2969 }
2970
2971 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2972                                struct ieee80211_vif *vif,
2973                                enum sta_notify_cmd cmd,
2974                                struct ieee80211_sta *sta)
2975 {
2976         struct iwl_priv *priv = hw->priv;
2977         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2978         int sta_id;
2979
2980         /*
2981          * TODO: We really should use this callback to
2982          *       actually maintain the station table in
2983          *       the device.
2984          */
2985
2986         switch (cmd) {
2987         case STA_NOTIFY_ADD:
2988                 atomic_set(&sta_priv->pending_frames, 0);
2989                 if (vif->type == NL80211_IFTYPE_AP)
2990                         sta_priv->client = true;
2991                 break;
2992         case STA_NOTIFY_SLEEP:
2993                 WARN_ON(!sta_priv->client);
2994                 sta_priv->asleep = true;
2995                 if (atomic_read(&sta_priv->pending_frames) > 0)
2996                         ieee80211_sta_block_awake(hw, sta, true);
2997                 break;
2998         case STA_NOTIFY_AWAKE:
2999                 WARN_ON(!sta_priv->client);
3000                 if (!sta_priv->asleep)
3001                         break;
3002                 sta_priv->asleep = false;
3003                 sta_id = iwl_find_station(priv, sta->addr);
3004                 if (sta_id != IWL_INVALID_STATION)
3005                         iwl_sta_modify_ps_wake(priv, sta_id);
3006                 break;
3007         default:
3008                 break;
3009         }
3010 }
3011
3012 /*****************************************************************************
3013  *
3014  * sysfs attributes
3015  *
3016  *****************************************************************************/
3017
3018 #ifdef CONFIG_IWLWIFI_DEBUG
3019
3020 /*
3021  * The following adds a new attribute to the sysfs representation
3022  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3023  * used for controlling the debug level.
3024  *
3025  * See the level definitions in iwl for details.
3026  *
3027  * The debug_level being managed using sysfs below is a per device debug
3028  * level that is used instead of the global debug level if it (the per
3029  * device debug level) is set.
3030  */
3031 static ssize_t show_debug_level(struct device *d,
3032                                 struct device_attribute *attr, char *buf)
3033 {
3034         struct iwl_priv *priv = dev_get_drvdata(d);
3035         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3036 }
3037 static ssize_t store_debug_level(struct device *d,
3038                                 struct device_attribute *attr,
3039                                  const char *buf, size_t count)
3040 {
3041         struct iwl_priv *priv = dev_get_drvdata(d);
3042         unsigned long val;
3043         int ret;
3044
3045         ret = strict_strtoul(buf, 0, &val);
3046         if (ret)
3047                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3048         else {
3049                 priv->debug_level = val;
3050                 if (iwl_alloc_traffic_mem(priv))
3051                         IWL_ERR(priv,
3052                                 "Not enough memory to generate traffic log\n");
3053         }
3054         return strnlen(buf, count);
3055 }
3056
3057 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3058                         show_debug_level, store_debug_level);
3059
3060
3061 #endif /* CONFIG_IWLWIFI_DEBUG */
3062
3063
3064 static ssize_t show_temperature(struct device *d,
3065                                 struct device_attribute *attr, char *buf)
3066 {
3067         struct iwl_priv *priv = dev_get_drvdata(d);
3068
3069         if (!iwl_is_alive(priv))
3070                 return -EAGAIN;
3071
3072         return sprintf(buf, "%d\n", priv->temperature);
3073 }
3074
3075 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3076
3077 static ssize_t show_tx_power(struct device *d,
3078                              struct device_attribute *attr, char *buf)
3079 {
3080         struct iwl_priv *priv = dev_get_drvdata(d);
3081
3082         if (!iwl_is_ready_rf(priv))
3083                 return sprintf(buf, "off\n");
3084         else
3085                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3086 }
3087
3088 static ssize_t store_tx_power(struct device *d,
3089                               struct device_attribute *attr,
3090                               const char *buf, size_t count)
3091 {
3092         struct iwl_priv *priv = dev_get_drvdata(d);
3093         unsigned long val;
3094         int ret;
3095
3096         ret = strict_strtoul(buf, 10, &val);
3097         if (ret)
3098                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3099         else {
3100                 ret = iwl_set_tx_power(priv, val, false);
3101                 if (ret)
3102                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
3103                                 ret);
3104                 else
3105                         ret = count;
3106         }
3107         return ret;
3108 }
3109
3110 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3111
3112 static ssize_t show_statistics(struct device *d,
3113                                struct device_attribute *attr, char *buf)
3114 {
3115         struct iwl_priv *priv = dev_get_drvdata(d);
3116         u32 size = sizeof(struct iwl_notif_statistics);
3117         u32 len = 0, ofs = 0;
3118         u8 *data = (u8 *)&priv->statistics;
3119         int rc = 0;
3120
3121         if (!iwl_is_alive(priv))
3122                 return -EAGAIN;
3123
3124         mutex_lock(&priv->mutex);
3125         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3126         mutex_unlock(&priv->mutex);
3127
3128         if (rc) {
3129                 len = sprintf(buf,
3130                               "Error sending statistics request: 0x%08X\n", rc);
3131                 return len;
3132         }
3133
3134         while (size && (PAGE_SIZE - len)) {
3135                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3136                                    PAGE_SIZE - len, 1);
3137                 len = strlen(buf);
3138                 if (PAGE_SIZE - len)
3139                         buf[len++] = '\n';
3140
3141                 ofs += 16;
3142                 size -= min(size, 16U);
3143         }
3144
3145         return len;
3146 }
3147
3148 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3149
3150 static ssize_t show_rts_ht_protection(struct device *d,
3151                              struct device_attribute *attr, char *buf)
3152 {
3153         struct iwl_priv *priv = dev_get_drvdata(d);
3154
3155         return sprintf(buf, "%s\n",
3156                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3157 }
3158
3159 static ssize_t store_rts_ht_protection(struct device *d,
3160                               struct device_attribute *attr,
3161                               const char *buf, size_t count)
3162 {
3163         struct iwl_priv *priv = dev_get_drvdata(d);
3164         unsigned long val;
3165         int ret;
3166
3167         ret = strict_strtoul(buf, 10, &val);
3168         if (ret)
3169                 IWL_INFO(priv, "Input is not in decimal form.\n");
3170         else {
3171                 if (!iwl_is_associated(priv))
3172                         priv->cfg->use_rts_for_ht = val ? true : false;
3173                 else
3174                         IWL_ERR(priv, "Sta associated with AP - "
3175                                 "Change protection mechanism is not allowed\n");
3176                 ret = count;
3177         }
3178         return ret;
3179 }
3180
3181 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3182                         show_rts_ht_protection, store_rts_ht_protection);
3183
3184
3185 /*****************************************************************************
3186  *
3187  * driver setup and teardown
3188  *
3189  *****************************************************************************/
3190
3191 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3192 {
3193         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3194
3195         init_waitqueue_head(&priv->wait_command_queue);
3196
3197         INIT_WORK(&priv->restart, iwl_bg_restart);
3198         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3199         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3200         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3201         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3202         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3203
3204         iwl_setup_scan_deferred_work(priv);
3205
3206         if (priv->cfg->ops->lib->setup_deferred_work)
3207                 priv->cfg->ops->lib->setup_deferred_work(priv);
3208
3209         init_timer(&priv->statistics_periodic);
3210         priv->statistics_periodic.data = (unsigned long)priv;
3211         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3212
3213         init_timer(&priv->ucode_trace);
3214         priv->ucode_trace.data = (unsigned long)priv;
3215         priv->ucode_trace.function = iwl_bg_ucode_trace;
3216
3217         if (!priv->cfg->use_isr_legacy)
3218                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3219                         iwl_irq_tasklet, (unsigned long)priv);
3220         else
3221                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3222                         iwl_irq_tasklet_legacy, (unsigned long)priv);
3223 }
3224
3225 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3226 {
3227         if (priv->cfg->ops->lib->cancel_deferred_work)
3228                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3229
3230         cancel_delayed_work_sync(&priv->init_alive_start);
3231         cancel_delayed_work(&priv->scan_check);
3232         cancel_delayed_work(&priv->alive_start);
3233         cancel_work_sync(&priv->beacon_update);
3234         del_timer_sync(&priv->statistics_periodic);
3235         del_timer_sync(&priv->ucode_trace);
3236 }
3237
3238 static void iwl_init_hw_rates(struct iwl_priv *priv,
3239                               struct ieee80211_rate *rates)
3240 {
3241         int i;
3242
3243         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3244                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3245                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3246                 rates[i].hw_value_short = i;
3247                 rates[i].flags = 0;
3248                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3249                         /*
3250                          * If CCK != 1M then set short preamble rate flag.
3251                          */
3252                         rates[i].flags |=
3253                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3254                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3255                 }
3256         }
3257 }
3258
3259 static int iwl_init_drv(struct iwl_priv *priv)
3260 {
3261         int ret;
3262
3263         priv->ibss_beacon = NULL;
3264
3265         spin_lock_init(&priv->sta_lock);
3266         spin_lock_init(&priv->hcmd_lock);
3267
3268         INIT_LIST_HEAD(&priv->free_frames);
3269
3270         mutex_init(&priv->mutex);
3271         mutex_init(&priv->sync_cmd_mutex);
3272
3273         /* Clear the driver's (not device's) station table */
3274         iwl_clear_stations_table(priv);
3275
3276         priv->ieee_channels = NULL;
3277         priv->ieee_rates = NULL;
3278         priv->band = IEEE80211_BAND_2GHZ;
3279
3280         priv->iw_mode = NL80211_IFTYPE_STATION;
3281         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3282         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3283
3284         /* initialize force reset */
3285         priv->force_reset[IWL_RF_RESET].reset_duration =
3286                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3287         priv->force_reset[IWL_FW_RESET].reset_duration =
3288                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3289
3290         /* Choose which receivers/antennas to use */
3291         if (priv->cfg->ops->hcmd->set_rxon_chain)
3292                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3293
3294         iwl_init_scan_params(priv);
3295
3296         iwl_reset_qos(priv);
3297
3298         priv->qos_data.qos_active = 0;
3299         priv->qos_data.qos_cap.val = 0;
3300
3301         /* Set the tx_power_user_lmt to the lowest power level
3302          * this value will get overwritten by channel max power avg
3303          * from eeprom */
3304         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
3305
3306         ret = iwl_init_channel_map(priv);
3307         if (ret) {
3308                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3309                 goto err;
3310         }
3311
3312         ret = iwlcore_init_geos(priv);
3313         if (ret) {
3314                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3315                 goto err_free_channel_map;
3316         }
3317         iwl_init_hw_rates(priv, priv->ieee_rates);
3318
3319         return 0;
3320
3321 err_free_channel_map:
3322         iwl_free_channel_map(priv);
3323 err:
3324         return ret;
3325 }
3326
3327 static void iwl_uninit_drv(struct iwl_priv *priv)
3328 {
3329         iwl_calib_free_results(priv);
3330         iwlcore_free_geos(priv);
3331         iwl_free_channel_map(priv);
3332         kfree(priv->scan);
3333 }
3334
3335 static struct attribute *iwl_sysfs_entries[] = {
3336         &dev_attr_statistics.attr,
3337         &dev_attr_temperature.attr,
3338         &dev_attr_tx_power.attr,
3339         &dev_attr_rts_ht_protection.attr,
3340 #ifdef CONFIG_IWLWIFI_DEBUG
3341         &dev_attr_debug_level.attr,
3342 #endif
3343         NULL
3344 };
3345
3346 static struct attribute_group iwl_attribute_group = {
3347         .name = NULL,           /* put in device directory */
3348         .attrs = iwl_sysfs_entries,
3349 };
3350
3351 static struct ieee80211_ops iwl_hw_ops = {
3352         .tx = iwl_mac_tx,
3353         .start = iwl_mac_start,
3354         .stop = iwl_mac_stop,
3355         .add_interface = iwl_mac_add_interface,
3356         .remove_interface = iwl_mac_remove_interface,
3357         .config = iwl_mac_config,
3358         .configure_filter = iwl_configure_filter,
3359         .set_key = iwl_mac_set_key,
3360         .update_tkip_key = iwl_mac_update_tkip_key,
3361         .get_stats = iwl_mac_get_stats,
3362         .conf_tx = iwl_mac_conf_tx,
3363         .reset_tsf = iwl_mac_reset_tsf,
3364         .bss_info_changed = iwl_bss_info_changed,
3365         .ampdu_action = iwl_mac_ampdu_action,
3366         .hw_scan = iwl_mac_hw_scan,
3367         .sta_notify = iwl_mac_sta_notify,
3368 };
3369
3370 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3371 {
3372         int err = 0;
3373         struct iwl_priv *priv;
3374         struct ieee80211_hw *hw;
3375         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3376         unsigned long flags;
3377         u16 pci_cmd;
3378
3379         /************************
3380          * 1. Allocating HW data
3381          ************************/
3382
3383         /* Disabling hardware scan means that mac80211 will perform scans
3384          * "the hard way", rather than using device's scan. */
3385         if (cfg->mod_params->disable_hw_scan) {
3386                 if (iwl_debug_level & IWL_DL_INFO)
3387                         dev_printk(KERN_DEBUG, &(pdev->dev),
3388                                    "Disabling hw_scan\n");
3389                 iwl_hw_ops.hw_scan = NULL;
3390         }
3391
3392         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3393         if (!hw) {
3394                 err = -ENOMEM;
3395                 goto out;
3396         }
3397         priv = hw->priv;
3398         /* At this point both hw and priv are allocated. */
3399
3400         SET_IEEE80211_DEV(hw, &pdev->dev);
3401
3402         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3403         priv->cfg = cfg;
3404         priv->pci_dev = pdev;
3405         priv->inta_mask = CSR_INI_SET_MASK;
3406
3407 #ifdef CONFIG_IWLWIFI_DEBUG
3408         atomic_set(&priv->restrict_refcnt, 0);
3409 #endif
3410         if (iwl_alloc_traffic_mem(priv))
3411                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3412
3413         /**************************
3414          * 2. Initializing PCI bus
3415          **************************/
3416         if (pci_enable_device(pdev)) {
3417                 err = -ENODEV;
3418                 goto out_ieee80211_free_hw;
3419         }
3420
3421         pci_set_master(pdev);
3422
3423         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3424         if (!err)
3425                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3426         if (err) {
3427                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3428                 if (!err)
3429                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3430                 /* both attempts failed: */
3431                 if (err) {
3432                         IWL_WARN(priv, "No suitable DMA available.\n");
3433                         goto out_pci_disable_device;
3434                 }
3435         }
3436
3437         err = pci_request_regions(pdev, DRV_NAME);
3438         if (err)
3439                 goto out_pci_disable_device;
3440
3441         pci_set_drvdata(pdev, priv);
3442
3443
3444         /***********************
3445          * 3. Read REV register
3446          ***********************/
3447         priv->hw_base = pci_iomap(pdev, 0, 0);
3448         if (!priv->hw_base) {
3449                 err = -ENODEV;
3450                 goto out_pci_release_regions;
3451         }
3452
3453         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3454                 (unsigned long long) pci_resource_len(pdev, 0));
3455         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3456
3457         /* these spin locks will be used in apm_ops.init and EEPROM access
3458          * we should init now
3459          */
3460         spin_lock_init(&priv->reg_lock);
3461         spin_lock_init(&priv->lock);
3462
3463         /*
3464          * stop and reset the on-board processor just in case it is in a
3465          * strange state ... like being left stranded by a primary kernel
3466          * and this is now the kdump kernel trying to start up
3467          */
3468         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3469
3470         iwl_hw_detect(priv);
3471         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3472                 priv->cfg->name, priv->hw_rev);
3473
3474         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3475          * PCI Tx retries from interfering with C3 CPU state */
3476         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3477
3478         iwl_prepare_card_hw(priv);
3479         if (!priv->hw_ready) {
3480                 IWL_WARN(priv, "Failed, HW not ready\n");
3481                 goto out_iounmap;
3482         }
3483
3484         /*****************
3485          * 4. Read EEPROM
3486          *****************/
3487         /* Read the EEPROM */
3488         err = iwl_eeprom_init(priv);
3489         if (err) {
3490                 IWL_ERR(priv, "Unable to init EEPROM\n");
3491                 goto out_iounmap;
3492         }
3493         err = iwl_eeprom_check_version(priv);
3494         if (err)
3495                 goto out_free_eeprom;
3496
3497         /* extract MAC Address */
3498         iwl_eeprom_get_mac(priv, priv->mac_addr);
3499         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3500         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3501
3502         /************************
3503          * 5. Setup HW constants
3504          ************************/
3505         if (iwl_set_hw_params(priv)) {
3506                 IWL_ERR(priv, "failed to set hw parameters\n");
3507                 goto out_free_eeprom;
3508         }
3509
3510         /*******************
3511          * 6. Setup priv
3512          *******************/
3513
3514         err = iwl_init_drv(priv);
3515         if (err)
3516                 goto out_free_eeprom;
3517         /* At this point both hw and priv are initialized. */
3518
3519         /********************
3520          * 7. Setup services
3521          ********************/
3522         spin_lock_irqsave(&priv->lock, flags);
3523         iwl_disable_interrupts(priv);
3524         spin_unlock_irqrestore(&priv->lock, flags);
3525
3526         pci_enable_msi(priv->pci_dev);
3527
3528         iwl_alloc_isr_ict(priv);
3529         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3530                           IRQF_SHARED, DRV_NAME, priv);
3531         if (err) {
3532                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3533                 goto out_disable_msi;
3534         }
3535         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3536         if (err) {
3537                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3538                 goto out_free_irq;
3539         }
3540
3541         iwl_setup_deferred_work(priv);
3542         iwl_setup_rx_handlers(priv);
3543
3544         /*********************************************
3545          * 8. Enable interrupts and read RFKILL state
3546          *********************************************/
3547
3548         /* enable interrupts if needed: hw bug w/a */
3549         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3550         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3551                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3552                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3553         }
3554
3555         iwl_enable_interrupts(priv);
3556
3557         /* If platform's RF_KILL switch is NOT set to KILL */
3558         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3559                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3560         else
3561                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3562
3563         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3564                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3565
3566         iwl_power_initialize(priv);
3567         iwl_tt_initialize(priv);
3568
3569         err = iwl_request_firmware(priv, true);
3570         if (err)
3571                 goto out_remove_sysfs;
3572
3573         return 0;
3574
3575  out_remove_sysfs:
3576         destroy_workqueue(priv->workqueue);
3577         priv->workqueue = NULL;
3578         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3579  out_free_irq:
3580         free_irq(priv->pci_dev->irq, priv);
3581         iwl_free_isr_ict(priv);
3582  out_disable_msi:
3583         pci_disable_msi(priv->pci_dev);
3584         iwl_uninit_drv(priv);
3585  out_free_eeprom:
3586         iwl_eeprom_free(priv);
3587  out_iounmap:
3588         pci_iounmap(pdev, priv->hw_base);
3589  out_pci_release_regions:
3590         pci_set_drvdata(pdev, NULL);
3591         pci_release_regions(pdev);
3592  out_pci_disable_device:
3593         pci_disable_device(pdev);
3594  out_ieee80211_free_hw:
3595         iwl_free_traffic_mem(priv);
3596         ieee80211_free_hw(priv->hw);
3597  out:
3598         return err;
3599 }
3600
3601 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3602 {
3603         struct iwl_priv *priv = pci_get_drvdata(pdev);
3604         unsigned long flags;
3605
3606         if (!priv)
3607                 return;
3608
3609         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3610
3611         iwl_dbgfs_unregister(priv);
3612         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3613
3614         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3615          * to be called and iwl_down since we are removing the device
3616          * we need to set STATUS_EXIT_PENDING bit.
3617          */
3618         set_bit(STATUS_EXIT_PENDING, &priv->status);
3619         if (priv->mac80211_registered) {
3620                 ieee80211_unregister_hw(priv->hw);
3621                 priv->mac80211_registered = 0;
3622         } else {
3623                 iwl_down(priv);
3624         }
3625
3626         /*
3627          * Make sure device is reset to low power before unloading driver.
3628          * This may be redundant with iwl_down(), but there are paths to
3629          * run iwl_down() without calling apm_ops.stop(), and there are
3630          * paths to avoid running iwl_down() at all before leaving driver.
3631          * This (inexpensive) call *makes sure* device is reset.
3632          */
3633         priv->cfg->ops->lib->apm_ops.stop(priv);
3634
3635         iwl_tt_exit(priv);
3636
3637         /* make sure we flush any pending irq or
3638          * tasklet for the driver
3639          */
3640         spin_lock_irqsave(&priv->lock, flags);
3641         iwl_disable_interrupts(priv);
3642         spin_unlock_irqrestore(&priv->lock, flags);
3643
3644         iwl_synchronize_irq(priv);
3645
3646         iwl_dealloc_ucode_pci(priv);
3647
3648         if (priv->rxq.bd)
3649                 iwl_rx_queue_free(priv, &priv->rxq);
3650         iwl_hw_txq_ctx_free(priv);
3651
3652         iwl_clear_stations_table(priv);
3653         iwl_eeprom_free(priv);
3654
3655
3656         /*netif_stop_queue(dev); */
3657         flush_workqueue(priv->workqueue);
3658
3659         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3660          * priv->workqueue... so we can't take down the workqueue
3661          * until now... */
3662         destroy_workqueue(priv->workqueue);
3663         priv->workqueue = NULL;
3664         iwl_free_traffic_mem(priv);
3665
3666         free_irq(priv->pci_dev->irq, priv);
3667         pci_disable_msi(priv->pci_dev);
3668         pci_iounmap(pdev, priv->hw_base);
3669         pci_release_regions(pdev);
3670         pci_disable_device(pdev);
3671         pci_set_drvdata(pdev, NULL);
3672
3673         iwl_uninit_drv(priv);
3674
3675         iwl_free_isr_ict(priv);
3676
3677         if (priv->ibss_beacon)
3678                 dev_kfree_skb(priv->ibss_beacon);
3679
3680         ieee80211_free_hw(priv->hw);
3681 }
3682
3683
3684 /*****************************************************************************
3685  *
3686  * driver and module entry point
3687  *
3688  *****************************************************************************/
3689
3690 /* Hardware specific file defines the PCI IDs table for that hardware module */
3691 static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
3692 #ifdef CONFIG_IWL4965
3693         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3694         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3695 #endif /* CONFIG_IWL4965 */
3696 #ifdef CONFIG_IWL5000
3697 /* 5100 Series WiFi */
3698         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
3699         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
3700         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
3701         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
3702         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
3703         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
3704         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
3705         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
3706         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
3707         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
3708         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
3709         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
3710         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
3711         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
3712         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
3713         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
3714         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
3715         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
3716         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
3717         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
3718         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
3719         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
3720         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
3721         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
3722
3723 /* 5300 Series WiFi */
3724         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
3725         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
3726         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
3727         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
3728         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
3729         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
3730         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
3731         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
3732         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
3733         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
3734         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
3735         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
3736
3737 /* 5350 Series WiFi/WiMax */
3738         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
3739         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
3740         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
3741
3742 /* 5150 Series Wifi/WiMax */
3743         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
3744         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
3745         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
3746         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
3747         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
3748         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
3749
3750         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
3751         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
3752         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
3753         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
3754
3755 /* 6x00 Series */
3756         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3757         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3758         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3759         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3760         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3761         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3762         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3763         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3764         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3765         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3766
3767 /* 6x50 WiFi/WiMax Series */
3768         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3769         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3770         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3771         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3772         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3773         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3774
3775 /* 1000 Series WiFi */
3776         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3777         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3778         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3779         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3780         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3781         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3782         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3783         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3784         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3785         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3786         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3787         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3788 #endif /* CONFIG_IWL5000 */
3789
3790         {0}
3791 };
3792 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3793
3794 static struct pci_driver iwl_driver = {
3795         .name = DRV_NAME,
3796         .id_table = iwl_hw_card_ids,
3797         .probe = iwl_pci_probe,
3798         .remove = __devexit_p(iwl_pci_remove),
3799 #ifdef CONFIG_PM
3800         .suspend = iwl_pci_suspend,
3801         .resume = iwl_pci_resume,
3802 #endif
3803 };
3804
3805 static int __init iwl_init(void)
3806 {
3807
3808         int ret;
3809         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3810         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3811
3812         ret = iwlagn_rate_control_register();
3813         if (ret) {
3814                 printk(KERN_ERR DRV_NAME
3815                        "Unable to register rate control algorithm: %d\n", ret);
3816                 return ret;
3817         }
3818
3819         ret = pci_register_driver(&iwl_driver);
3820         if (ret) {
3821                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3822                 goto error_register;
3823         }
3824
3825         return ret;
3826
3827 error_register:
3828         iwlagn_rate_control_unregister();
3829         return ret;
3830 }
3831
3832 static void __exit iwl_exit(void)
3833 {
3834         pci_unregister_driver(&iwl_driver);
3835         iwlagn_rate_control_unregister();
3836 }
3837
3838 module_exit(iwl_exit);
3839 module_init(iwl_init);
3840
3841 #ifdef CONFIG_IWLWIFI_DEBUG
3842 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3843 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3844 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3845 MODULE_PARM_DESC(debug, "debug output mask");
3846 #endif
3847