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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/slab.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/delay.h>
  38 #include <linux/sched.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/wireless.h>
  42 #include <linux/firmware.h>
  43 #include <linux/etherdevice.h>
  44 #include <linux/if_arp.h>
  45
  46 #include <net/mac80211.h>
  47
  48 #include <asm/div64.h>
  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-agn-calib.h"
  57 #include "iwl-agn.h"
  58 #include "iwl-pci.h"
  59 #include "iwl-trans.h"
  60
  61 /******************************************************************************
  62  *
  63  * module boiler plate
  64  *
  65  ******************************************************************************/
  66
  67 /*
  68  * module name, copyright, version, etc.
  69  */
  70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 #define DRV_VERSION     IWLWIFI_VERSION VD
  79
  80
  81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  82 MODULE_VERSION(DRV_VERSION);
  83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  84 MODULE_LICENSE("GPL");
  85
  86 static int iwlagn_ant_coupling;
  87 static bool iwlagn_bt_ch_announce = 1;
  88
  89 void iwl_update_chain_flags(struct iwl_priv *priv)
  90 {
  91         struct iwl_rxon_context *ctx;
  92
  93         for_each_context(priv, ctx) {
  94                 iwlagn_set_rxon_chain(priv, ctx);
  95                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
  96                         iwlagn_commit_rxon(priv, ctx);
  97         }
  98 }
  99
 100 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 101 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 102                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 103                                u8 *beacon, u32 frame_size)
 104 {
 105         u16 tim_idx;
 106         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 107
 108         /*
 109          * The index is relative to frame start but we start looking at the
 110          * variable-length part of the beacon.
 111          */
 112         tim_idx = mgmt->u.beacon.variable - beacon;
 113
 114         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 115         while ((tim_idx < (frame_size - 2)) &&
 116                         (beacon[tim_idx] != WLAN_EID_TIM))
 117                 tim_idx += beacon[tim_idx+1] + 2;
 118
 119         /* If TIM field was found, set variables */
 120         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 121                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 122                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 123         } else
 124                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 125 }
 126
 127 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 128 {
 129         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 130         struct iwl_host_cmd cmd = {
 131                 .id = REPLY_TX_BEACON,
 132                 .flags = CMD_SYNC,
 133         };
 134         struct ieee80211_tx_info *info;
 135         u32 frame_size;
 136         u32 rate_flags;
 137         u32 rate;
 138
 139         /*
 140          * We have to set up the TX command, the TX Beacon command, and the
 141          * beacon contents.
 142          */
 143
 144         lockdep_assert_held(&priv->mutex);
 145
 146         if (!priv->beacon_ctx) {
 147                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 148                 return 0;
 149         }
 150
 151         if (WARN_ON(!priv->beacon_skb))
 152                 return -EINVAL;
 153
 154         /* Allocate beacon command */
 155         if (!priv->beacon_cmd)
 156                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 157         tx_beacon_cmd = priv->beacon_cmd;
 158         if (!tx_beacon_cmd)
 159                 return -ENOMEM;
 160
 161         frame_size = priv->beacon_skb->len;
 162
 163         /* Set up TX command fields */
 164         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 165         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 166         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 167         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 168                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 169
 170         /* Set up TX beacon command fields */
 171         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 172                            frame_size);
 173
 174         /* Set up packet rate and flags */
 175         info = IEEE80211_SKB_CB(priv->beacon_skb);
 176
 177         /*
 178          * Let's set up the rate at least somewhat correctly;
 179          * it will currently not actually be used by the uCode,
 180          * it uses the broadcast station's rate instead.
 181          */
 182         if (info->control.rates[0].idx < 0 ||
 183             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 184                 rate = 0;
 185         else
 186                 rate = info->control.rates[0].idx;
 187
 188         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 189                                               priv->hw_params.valid_tx_ant);
 190         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 191
 192         /* In mac80211, rates for 5 GHz start at 0 */
 193         if (info->band == IEEE80211_BAND_5GHZ)
 194                 rate += IWL_FIRST_OFDM_RATE;
 195         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 196                 rate_flags |= RATE_MCS_CCK_MSK;
 197
 198         tx_beacon_cmd->tx.rate_n_flags =
 199                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 200
 201         /* Submit command */
 202         cmd.len[0] = sizeof(*tx_beacon_cmd);
 203         cmd.data[0] = tx_beacon_cmd;
 204         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 205         cmd.len[1] = frame_size;
 206         cmd.data[1] = priv->beacon_skb->data;
 207         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 208
 209         return trans_send_cmd(priv, &cmd);
 210 }
 211
 212 static void iwl_bg_beacon_update(struct work_struct *work)
 213 {
 214         struct iwl_priv *priv =
 215                 container_of(work, struct iwl_priv, beacon_update);
 216         struct sk_buff *beacon;
 217
 218         mutex_lock(&priv->mutex);
 219         if (!priv->beacon_ctx) {
 220                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 221                 goto out;
 222         }
 223
 224         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 225                 /*
 226                  * The ucode will send beacon notifications even in
 227                  * IBSS mode, but we don't want to process them. But
 228                  * we need to defer the type check to here due to
 229                  * requiring locking around the beacon_ctx access.
 230                  */
 231                 goto out;
 232         }
 233
 234         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 235         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 236         if (!beacon) {
 237                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 238                 goto out;
 239         }
 240
 241         /* new beacon skb is allocated every time; dispose previous.*/
 242         dev_kfree_skb(priv->beacon_skb);
 243
 244         priv->beacon_skb = beacon;
 245
 246         iwlagn_send_beacon_cmd(priv);
 247  out:
 248         mutex_unlock(&priv->mutex);
 249 }
 250
 251 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 252 {
 253         struct iwl_priv *priv =
 254                 container_of(work, struct iwl_priv, bt_runtime_config);
 255
 256         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 257                 return;
 258
 259         /* dont send host command if rf-kill is on */
 260         if (!iwl_is_ready_rf(priv))
 261                 return;
 262         iwlagn_send_advance_bt_config(priv);
 263 }
 264
 265 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 266 {
 267         struct iwl_priv *priv =
 268                 container_of(work, struct iwl_priv, bt_full_concurrency);
 269         struct iwl_rxon_context *ctx;
 270
 271         mutex_lock(&priv->mutex);
 272
 273         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 274                 goto out;
 275
 276         /* dont send host command if rf-kill is on */
 277         if (!iwl_is_ready_rf(priv))
 278                 goto out;
 279
 280         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 281                        priv->bt_full_concurrent ?
 282                        "full concurrency" : "3-wire");
 283
 284         /*
 285          * LQ & RXON updated cmds must be sent before BT Config cmd
 286          * to avoid 3-wire collisions
 287          */
 288         for_each_context(priv, ctx) {
 289                 iwlagn_set_rxon_chain(priv, ctx);
 290                 iwlagn_commit_rxon(priv, ctx);
 291         }
 292
 293         iwlagn_send_advance_bt_config(priv);
 294 out:
 295         mutex_unlock(&priv->mutex);
 296 }
 297
 298 /**
 299  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 300  *
 301  * This callback is provided in order to send a statistics request.
 302  *
 303  * This timer function is continually reset to execute within
 304  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 305  * was received.  We need to ensure we receive the statistics in order
 306  * to update the temperature used for calibrating the TXPOWER.
 307  */
 308 static void iwl_bg_statistics_periodic(unsigned long data)
 309 {
 310         struct iwl_priv *priv = (struct iwl_priv *)data;
 311
 312         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 313                 return;
 314
 315         /* dont send host command if rf-kill is on */
 316         if (!iwl_is_ready_rf(priv))
 317                 return;
 318
 319         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 320 }
 321
 322
 323 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 324                                         u32 start_idx, u32 num_events,
 325                                         u32 mode)
 326 {
 327         u32 i;
 328         u32 ptr;        /* SRAM byte address of log data */
 329         u32 ev, time, data; /* event log data */
 330         unsigned long reg_flags;
 331
 332         if (mode == 0)
 333                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 334         else
 335                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 336
 337         /* Make sure device is powered up for SRAM reads */
 338         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 339         if (iwl_grab_nic_access(priv)) {
 340                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 341                 return;
 342         }
 343
 344         /* Set starting address; reads will auto-increment */
 345         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
 346         rmb();
 347
 348         /*
 349          * "time" is actually "data" for mode 0 (no timestamp).
 350          * place event id # at far right for easier visual parsing.
 351          */
 352         for (i = 0; i < num_events; i++) {
 353                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 354                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 355                 if (mode == 0) {
 356                         trace_iwlwifi_dev_ucode_cont_event(priv,
 357                                                         0, time, ev);
 358                 } else {
 359                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 360                         trace_iwlwifi_dev_ucode_cont_event(priv,
 361                                                 time, data, ev);
 362                 }
 363         }
 364         /* Allow device to power down */
 365         iwl_release_nic_access(priv);
 366         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 367 }
 368
 369 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 370 {
 371         u32 capacity;   /* event log capacity in # entries */
 372         u32 base;       /* SRAM byte address of event log header */
 373         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 374         u32 num_wraps;  /* # times uCode wrapped to top of log */
 375         u32 next_entry; /* index of next entry to be written by uCode */
 376
 377         base = priv->device_pointers.error_event_table;
 378         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
 379                 capacity = iwl_read_targ_mem(priv, base);
 380                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
 381                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
 382                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
 383         } else
 384                 return;
 385
 386         if (num_wraps == priv->event_log.num_wraps) {
 387                 iwl_print_cont_event_trace(priv,
 388                                        base, priv->event_log.next_entry,
 389                                        next_entry - priv->event_log.next_entry,
 390                                        mode);
 391                 priv->event_log.non_wraps_count++;
 392         } else {
 393                 if ((num_wraps - priv->event_log.num_wraps) > 1)
 394                         priv->event_log.wraps_more_count++;
 395                 else
 396                         priv->event_log.wraps_once_count++;
 397                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 398                                 num_wraps - priv->event_log.num_wraps,
 399                                 next_entry, priv->event_log.next_entry);
 400                 if (next_entry < priv->event_log.next_entry) {
 401                         iwl_print_cont_event_trace(priv, base,
 402                                priv->event_log.next_entry,
 403                                capacity - priv->event_log.next_entry,
 404                                mode);
 405
 406                         iwl_print_cont_event_trace(priv, base, 0,
 407                                 next_entry, mode);
 408                 } else {
 409                         iwl_print_cont_event_trace(priv, base,
 410                                next_entry, capacity - next_entry,
 411                                mode);
 412
 413                         iwl_print_cont_event_trace(priv, base, 0,
 414                                 next_entry, mode);
 415                 }
 416         }
 417         priv->event_log.num_wraps = num_wraps;
 418         priv->event_log.next_entry = next_entry;
 419 }
 420
 421 /**
 422  * iwl_bg_ucode_trace - Timer callback to log ucode event
 423  *
 424  * The timer is continually set to execute every
 425  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 426  * this function is to perform continuous uCode event logging operation
 427  * if enabled
 428  */
 429 static void iwl_bg_ucode_trace(unsigned long data)
 430 {
 431         struct iwl_priv *priv = (struct iwl_priv *)data;
 432
 433         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 434                 return;
 435
 436         if (priv->event_log.ucode_trace) {
 437                 iwl_continuous_event_trace(priv);
 438                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 439                 mod_timer(&priv->ucode_trace,
 440                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 441         }
 442 }
 443
 444 static void iwl_bg_tx_flush(struct work_struct *work)
 445 {
 446         struct iwl_priv *priv =
 447                 container_of(work, struct iwl_priv, tx_flush);
 448
 449         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 450                 return;
 451
 452         /* do nothing if rf-kill is on */
 453         if (!iwl_is_ready_rf(priv))
 454                 return;
 455
 456         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 457         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 458 }
 459
 460 /**
 461  * iwl_rx_handle - Main entry function for receiving responses from uCode
 462  *
 463  * Uses the priv->rx_handlers callback function array to invoke
 464  * the appropriate handlers, including command responses,
 465  * frame-received notifications, and other notifications.
 466  */
 467 static void iwl_rx_handle(struct iwl_priv *priv)
 468 {
 469         struct iwl_rx_mem_buffer *rxb;
 470         struct iwl_rx_packet *pkt;
 471         struct iwl_rx_queue *rxq = &priv->rxq;
 472         u32 r, i;
 473         int reclaim;
 474         unsigned long flags;
 475         u8 fill_rx = 0;
 476         u32 count = 8;
 477         int total_empty;
 478
 479         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 480          * buffer that the driver may process (last buffer filled by ucode). */
 481         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 482         i = rxq->read;
 483
 484         /* Rx interrupt, but nothing sent from uCode */
 485         if (i == r)
 486                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 487
 488         /* calculate total frames need to be restock after handling RX */
 489         total_empty = r - rxq->write_actual;
 490         if (total_empty < 0)
 491                 total_empty += RX_QUEUE_SIZE;
 492
 493         if (total_empty > (RX_QUEUE_SIZE / 2))
 494                 fill_rx = 1;
 495
 496         while (i != r) {
 497                 int len;
 498
 499                 rxb = rxq->queue[i];
 500
 501                 /* If an RXB doesn't have a Rx queue slot associated with it,
 502                  * then a bug has been introduced in the queue refilling
 503                  * routines -- catch it here */
 504                 if (WARN_ON(rxb == NULL)) {
 505                         i = (i + 1) & RX_QUEUE_MASK;
 506                         continue;
 507                 }
 508
 509                 rxq->queue[i] = NULL;
 510
 511                 dma_unmap_page(priv->bus.dev, rxb->page_dma,
 512                                PAGE_SIZE << priv->hw_params.rx_page_order,
 513                                DMA_FROM_DEVICE);
 514                 pkt = rxb_addr(rxb);
 515
 516                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 517                 len += sizeof(u32); /* account for status word */
 518                 trace_iwlwifi_dev_rx(priv, pkt, len);
 519
 520                 /* Reclaim a command buffer only if this packet is a response
 521                  *   to a (driver-originated) command.
 522                  * If the packet (e.g. Rx frame) originated from uCode,
 523                  *   there is no command buffer to reclaim.
 524                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 525                  *   but apparently a few don't get set; catch them here. */
 526                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 527                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 528                         (pkt->hdr.cmd != REPLY_RX) &&
 529                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 530                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 531                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 532                         (pkt->hdr.cmd != REPLY_TX);
 533
 534                 /*
 535                  * Do the notification wait before RX handlers so
 536                  * even if the RX handler consumes the RXB we have
 537                  * access to it in the notification wait entry.
 538                  */
 539                 if (!list_empty(&priv->_agn.notif_waits)) {
 540                         struct iwl_notification_wait *w;
 541
 542                         spin_lock(&priv->_agn.notif_wait_lock);
 543                         list_for_each_entry(w, &priv->_agn.notif_waits, list) {
 544                                 if (w->cmd == pkt->hdr.cmd) {
 545                                         w->triggered = true;
 546                                         if (w->fn)
 547                                                 w->fn(priv, pkt, w->fn_data);
 548                                 }
 549                         }
 550                         spin_unlock(&priv->_agn.notif_wait_lock);
 551
 552                         wake_up_all(&priv->_agn.notif_waitq);
 553                 }
 554                 if (priv->pre_rx_handler)
 555                         priv->pre_rx_handler(priv, rxb);
 556
 557                 /* Based on type of command response or notification,
 558                  *   handle those that need handling via function in
 559                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 560                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 561                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 562                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 563                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 564                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 565                 } else {
 566                         /* No handling needed */
 567                         IWL_DEBUG_RX(priv,
 568                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 569                                 r, i, get_cmd_string(pkt->hdr.cmd),
 570                                 pkt->hdr.cmd);
 571                 }
 572
 573                 /*
 574                  * XXX: After here, we should always check rxb->page
 575                  * against NULL before touching it or its virtual
 576                  * memory (pkt). Because some rx_handler might have
 577                  * already taken or freed the pages.
 578                  */
 579
 580                 if (reclaim) {
 581                         /* Invoke any callbacks, transfer the buffer to caller,
 582                          * and fire off the (possibly) blocking
 583                          * trans_send_cmd()
 584                          * as we reclaim the driver command queue */
 585                         if (rxb->page)
 586                                 iwl_tx_cmd_complete(priv, rxb);
 587                         else
 588                                 IWL_WARN(priv, "Claim null rxb?\n");
 589                 }
 590
 591                 /* Reuse the page if possible. For notification packets and
 592                  * SKBs that fail to Rx correctly, add them back into the
 593                  * rx_free list for reuse later. */
 594                 spin_lock_irqsave(&rxq->lock, flags);
 595                 if (rxb->page != NULL) {
 596                         rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
 597                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
 598                                 DMA_FROM_DEVICE);
 599                         list_add_tail(&rxb->list, &rxq->rx_free);
 600                         rxq->free_count++;
 601                 } else
 602                         list_add_tail(&rxb->list, &rxq->rx_used);
 603
 604                 spin_unlock_irqrestore(&rxq->lock, flags);
 605
 606                 i = (i + 1) & RX_QUEUE_MASK;
 607                 /* If there are a lot of unused frames,
 608                  * restock the Rx queue so ucode wont assert. */
 609                 if (fill_rx) {
 610                         count++;
 611                         if (count >= 8) {
 612                                 rxq->read = i;
 613                                 iwlagn_rx_replenish_now(priv);
 614                                 count = 0;
 615                         }
 616                 }
 617         }
 618
 619         /* Backtrack one entry */
 620         rxq->read = i;
 621         if (fill_rx)
 622                 iwlagn_rx_replenish_now(priv);
 623         else
 624                 iwlagn_rx_queue_restock(priv);
 625 }
 626
 627 /* tasklet for iwlagn interrupt */
 628 static void iwl_irq_tasklet(struct iwl_priv *priv)
 629 {
 630         u32 inta = 0;
 631         u32 handled = 0;
 632         unsigned long flags;
 633         u32 i;
 634 #ifdef CONFIG_IWLWIFI_DEBUG
 635         u32 inta_mask;
 636 #endif
 637
 638         spin_lock_irqsave(&priv->lock, flags);
 639
 640         /* Ack/clear/reset pending uCode interrupts.
 641          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 642          */
 643         /* There is a hardware bug in the interrupt mask function that some
 644          * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
 645          * they are disabled in the CSR_INT_MASK register. Furthermore the
 646          * ICT interrupt handling mechanism has another bug that might cause
 647          * these unmasked interrupts fail to be detected. We workaround the
 648          * hardware bugs here by ACKing all the possible interrupts so that
 649          * interrupt coalescing can still be achieved.
 650          */
 651         iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
 652
 653         inta = priv->_agn.inta;
 654
 655 #ifdef CONFIG_IWLWIFI_DEBUG
 656         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
 657                 /* just for debug */
 658                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 659                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
 660                                 inta, inta_mask);
 661         }
 662 #endif
 663
 664         spin_unlock_irqrestore(&priv->lock, flags);
 665
 666         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
 667         priv->_agn.inta = 0;
 668
 669         /* Now service all interrupt bits discovered above. */
 670         if (inta & CSR_INT_BIT_HW_ERR) {
 671                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 672
 673                 /* Tell the device to stop sending interrupts */
 674                 iwl_disable_interrupts(priv);
 675
 676                 priv->isr_stats.hw++;
 677                 iwl_irq_handle_error(priv);
 678
 679                 handled |= CSR_INT_BIT_HW_ERR;
 680
 681                 return;
 682         }
 683
 684 #ifdef CONFIG_IWLWIFI_DEBUG
 685         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
 686                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
 687                 if (inta & CSR_INT_BIT_SCD) {
 688                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
 689                                       "the frame/frames.\n");
 690                         priv->isr_stats.sch++;
 691                 }
 692
 693                 /* Alive notification via Rx interrupt will do the real work */
 694                 if (inta & CSR_INT_BIT_ALIVE) {
 695                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
 696                         priv->isr_stats.alive++;
 697                 }
 698         }
 699 #endif
 700         /* Safely ignore these bits for debug checks below */
 701         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
 702
 703         /* HW RF KILL switch toggled */
 704         if (inta & CSR_INT_BIT_RF_KILL) {
 705                 int hw_rf_kill = 0;
 706                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
 707                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
 708                         hw_rf_kill = 1;
 709
 710                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
 711                                 hw_rf_kill ? "disable radio" : "enable radio");
 712
 713                 priv->isr_stats.rfkill++;
 714
 715                 /* driver only loads ucode once setting the interface up.
 716                  * the driver allows loading the ucode even if the radio
 717                  * is killed. Hence update the killswitch state here. The
 718                  * rfkill handler will care about restarting if needed.
 719                  */
 720                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
 721                         if (hw_rf_kill)
 722                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 723                         else
 724                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 725                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
 726                 }
 727
 728                 handled |= CSR_INT_BIT_RF_KILL;
 729         }
 730
 731         /* Chip got too hot and stopped itself */
 732         if (inta & CSR_INT_BIT_CT_KILL) {
 733                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
 734                 priv->isr_stats.ctkill++;
 735                 handled |= CSR_INT_BIT_CT_KILL;
 736         }
 737
 738         /* Error detected by uCode */
 739         if (inta & CSR_INT_BIT_SW_ERR) {
 740                 IWL_ERR(priv, "Microcode SW error detected. "
 741                         " Restarting 0x%X.\n", inta);
 742                 priv->isr_stats.sw++;
 743                 iwl_irq_handle_error(priv);
 744                 handled |= CSR_INT_BIT_SW_ERR;
 745         }
 746
 747         /* uCode wakes up after power-down sleep */
 748         if (inta & CSR_INT_BIT_WAKEUP) {
 749                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
 750                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
 751                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
 752                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
 753
 754                 priv->isr_stats.wakeup++;
 755
 756                 handled |= CSR_INT_BIT_WAKEUP;
 757         }
 758
 759         /* All uCode command responses, including Tx command responses,
 760          * Rx "responses" (frame-received notification), and other
 761          * notifications from uCode come through here*/
 762         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
 763                         CSR_INT_BIT_RX_PERIODIC)) {
 764                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
 765                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
 766                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
 767                         iwl_write32(priv, CSR_FH_INT_STATUS,
 768                                         CSR_FH_INT_RX_MASK);
 769                 }
 770                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
 771                         handled |= CSR_INT_BIT_RX_PERIODIC;
 772                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
 773                 }
 774                 /* Sending RX interrupt require many steps to be done in the
 775                  * the device:
 776                  * 1- write interrupt to current index in ICT table.
 777                  * 2- dma RX frame.
 778                  * 3- update RX shared data to indicate last write index.
 779                  * 4- send interrupt.
 780                  * This could lead to RX race, driver could receive RX interrupt
 781                  * but the shared data changes does not reflect this;
 782                  * periodic interrupt will detect any dangling Rx activity.
 783                  */
 784
 785                 /* Disable periodic interrupt; we use it as just a one-shot. */
 786                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
 787                             CSR_INT_PERIODIC_DIS);
 788                 iwl_rx_handle(priv);
 789
 790                 /*
 791                  * Enable periodic interrupt in 8 msec only if we received
 792                  * real RX interrupt (instead of just periodic int), to catch
 793                  * any dangling Rx interrupt.  If it was just the periodic
 794                  * interrupt, there was no dangling Rx activity, and no need
 795                  * to extend the periodic interrupt; one-shot is enough.
 796                  */
 797                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
 798                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
 799                                     CSR_INT_PERIODIC_ENA);
 800
 801                 priv->isr_stats.rx++;
 802         }
 803
 804         /* This "Tx" DMA channel is used only for loading uCode */
 805         if (inta & CSR_INT_BIT_FH_TX) {
 806                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
 807                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
 808                 priv->isr_stats.tx++;
 809                 handled |= CSR_INT_BIT_FH_TX;
 810                 /* Wake up uCode load routine, now that load is complete */
 811                 priv->ucode_write_complete = 1;
 812                 wake_up_interruptible(&priv->wait_command_queue);
 813         }
 814
 815         if (inta & ~handled) {
 816                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
 817                 priv->isr_stats.unhandled++;
 818         }
 819
 820         if (inta & ~(priv->inta_mask)) {
 821                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
 822                          inta & ~priv->inta_mask);
 823         }
 824
 825         /* Re-enable all interrupts */
 826         /* only Re-enable if disabled by irq */
 827         if (test_bit(STATUS_INT_ENABLED, &priv->status))
 828                 iwl_enable_interrupts(priv);
 829         /* Re-enable RF_KILL if it occurred */
 830         else if (handled & CSR_INT_BIT_RF_KILL)
 831                 iwl_enable_rfkill_int(priv);
 832 }
 833
 834 /*****************************************************************************
 835  *
 836  * sysfs attributes
 837  *
 838  *****************************************************************************/
 839
 840 #ifdef CONFIG_IWLWIFI_DEBUG
 841
 842 /*
 843  * The following adds a new attribute to the sysfs representation
 844  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
 845  * used for controlling the debug level.
 846  *
 847  * See the level definitions in iwl for details.
 848  *
 849  * The debug_level being managed using sysfs below is a per device debug
 850  * level that is used instead of the global debug level if it (the per
 851  * device debug level) is set.
 852  */
 853 static ssize_t show_debug_level(struct device *d,
 854                                 struct device_attribute *attr, char *buf)
 855 {
 856         struct iwl_priv *priv = dev_get_drvdata(d);
 857         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
 858 }
 859 static ssize_t store_debug_level(struct device *d,
 860                                 struct device_attribute *attr,
 861                                  const char *buf, size_t count)
 862 {
 863         struct iwl_priv *priv = dev_get_drvdata(d);
 864         unsigned long val;
 865         int ret;
 866
 867         ret = strict_strtoul(buf, 0, &val);
 868         if (ret)
 869                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
 870         else {
 871                 priv->debug_level = val;
 872                 if (iwl_alloc_traffic_mem(priv))
 873                         IWL_ERR(priv,
 874                                 "Not enough memory to generate traffic log\n");
 875         }
 876         return strnlen(buf, count);
 877 }
 878
 879 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
 880                         show_debug_level, store_debug_level);
 881
 882
 883 #endif /* CONFIG_IWLWIFI_DEBUG */
 884
 885
 886 static ssize_t show_temperature(struct device *d,
 887                                 struct device_attribute *attr, char *buf)
 888 {
 889         struct iwl_priv *priv = dev_get_drvdata(d);
 890
 891         if (!iwl_is_alive(priv))
 892                 return -EAGAIN;
 893
 894         return sprintf(buf, "%d\n", priv->temperature);
 895 }
 896
 897 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
 898
 899 static ssize_t show_tx_power(struct device *d,
 900                              struct device_attribute *attr, char *buf)
 901 {
 902         struct iwl_priv *priv = dev_get_drvdata(d);
 903
 904         if (!iwl_is_ready_rf(priv))
 905                 return sprintf(buf, "off\n");
 906         else
 907                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
 908 }
 909
 910 static ssize_t store_tx_power(struct device *d,
 911                               struct device_attribute *attr,
 912                               const char *buf, size_t count)
 913 {
 914         struct iwl_priv *priv = dev_get_drvdata(d);
 915         unsigned long val;
 916         int ret;
 917
 918         ret = strict_strtoul(buf, 10, &val);
 919         if (ret)
 920                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
 921         else {
 922                 ret = iwl_set_tx_power(priv, val, false);
 923                 if (ret)
 924                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
 925                                 ret);
 926                 else
 927                         ret = count;
 928         }
 929         return ret;
 930 }
 931
 932 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
 933
 934 static struct attribute *iwl_sysfs_entries[] = {
 935         &dev_attr_temperature.attr,
 936         &dev_attr_tx_power.attr,
 937 #ifdef CONFIG_IWLWIFI_DEBUG
 938         &dev_attr_debug_level.attr,
 939 #endif
 940         NULL
 941 };
 942
 943 static struct attribute_group iwl_attribute_group = {
 944         .name = NULL,           /* put in device directory */
 945         .attrs = iwl_sysfs_entries,
 946 };
 947
 948 /******************************************************************************
 949  *
 950  * uCode download functions
 951  *
 952  ******************************************************************************/
 953
 954 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
 955 {
 956         if (desc->v_addr)
 957                 dma_free_coherent(priv->bus.dev, desc->len,
 958                                   desc->v_addr, desc->p_addr);
 959         desc->v_addr = NULL;
 960         desc->len = 0;
 961 }
 962
 963 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
 964 {
 965         iwl_free_fw_desc(priv, &img->code);
 966         iwl_free_fw_desc(priv, &img->data);
 967 }
 968
 969 static void iwl_dealloc_ucode(struct iwl_priv *priv)
 970 {
 971         iwl_free_fw_img(priv, &priv->ucode_rt);
 972         iwl_free_fw_img(priv, &priv->ucode_init);
 973 }
 974
 975 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
 976                              const void *data, size_t len)
 977 {
 978         if (!len) {
 979                 desc->v_addr = NULL;
 980                 return -EINVAL;
 981         }
 982
 983         desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
 984                                           &desc->p_addr, GFP_KERNEL);
 985         if (!desc->v_addr)
 986                 return -ENOMEM;
 987
 988         desc->len = len;
 989         memcpy(desc->v_addr, data, len);
 990         return 0;
 991 }
 992
 993 struct iwlagn_ucode_capabilities {
 994         u32 max_probe_length;
 995         u32 standard_phy_calibration_size;
 996         u32 flags;
 997 };
 998
 999 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1000 static int iwl_mac_setup_register(struct iwl_priv *priv,
1001                                   struct iwlagn_ucode_capabilities *capa);
1002
1003 #define UCODE_EXPERIMENTAL_INDEX        100
1004 #define UCODE_EXPERIMENTAL_TAG          "exp"
1005
1006 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1007 {
1008         const char *name_pre = priv->cfg->fw_name_pre;
1009         char tag[8];
1010
1011         if (first) {
1012 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1013                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1014                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1015         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1016 #endif
1017                 priv->fw_index = priv->cfg->ucode_api_max;
1018                 sprintf(tag, "%d", priv->fw_index);
1019         } else {
1020                 priv->fw_index--;
1021                 sprintf(tag, "%d", priv->fw_index);
1022         }
1023
1024         if (priv->fw_index < priv->cfg->ucode_api_min) {
1025                 IWL_ERR(priv, "no suitable firmware found!\n");
1026                 return -ENOENT;
1027         }
1028
1029         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1030
1031         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1032                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1033                                 ? "EXPERIMENTAL " : "",
1034                        priv->firmware_name);
1035
1036         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1037                                        priv->bus.dev,
1038                                        GFP_KERNEL, priv, iwl_ucode_callback);
1039 }
1040
1041 struct iwlagn_firmware_pieces {
1042         const void *inst, *data, *init, *init_data;
1043         size_t inst_size, data_size, init_size, init_data_size;
1044
1045         u32 build;
1046
1047         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1048         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1049 };
1050
1051 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1052                                        const struct firmware *ucode_raw,
1053                                        struct iwlagn_firmware_pieces *pieces)
1054 {
1055         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1056         u32 api_ver, hdr_size;
1057         const u8 *src;
1058
1059         priv->ucode_ver = le32_to_cpu(ucode->ver);
1060         api_ver = IWL_UCODE_API(priv->ucode_ver);
1061
1062         switch (api_ver) {
1063         default:
1064                 hdr_size = 28;
1065                 if (ucode_raw->size < hdr_size) {
1066                         IWL_ERR(priv, "File size too small!\n");
1067                         return -EINVAL;
1068                 }
1069                 pieces->build = le32_to_cpu(ucode->u.v2.build);
1070                 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1071                 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1072                 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1073                 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1074                 src = ucode->u.v2.data;
1075                 break;
1076         case 0:
1077         case 1:
1078         case 2:
1079                 hdr_size = 24;
1080                 if (ucode_raw->size < hdr_size) {
1081                         IWL_ERR(priv, "File size too small!\n");
1082                         return -EINVAL;
1083                 }
1084                 pieces->build = 0;
1085                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1086                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1087                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1088                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1089                 src = ucode->u.v1.data;
1090                 break;
1091         }
1092
1093         /* Verify size of file vs. image size info in file's header */
1094         if (ucode_raw->size != hdr_size + pieces->inst_size +
1095                                 pieces->data_size + pieces->init_size +
1096                                 pieces->init_data_size) {
1097
1098                 IWL_ERR(priv,
1099                         "uCode file size %d does not match expected size\n",
1100                         (int)ucode_raw->size);
1101                 return -EINVAL;
1102         }
1103
1104         pieces->inst = src;
1105         src += pieces->inst_size;
1106         pieces->data = src;
1107         src += pieces->data_size;
1108         pieces->init = src;
1109         src += pieces->init_size;
1110         pieces->init_data = src;
1111         src += pieces->init_data_size;
1112
1113         return 0;
1114 }
1115
1116 static int iwlagn_wanted_ucode_alternative = 1;
1117
1118 static int iwlagn_load_firmware(struct iwl_priv *priv,
1119                                 const struct firmware *ucode_raw,
1120                                 struct iwlagn_firmware_pieces *pieces,
1121                                 struct iwlagn_ucode_capabilities *capa)
1122 {
1123         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1124         struct iwl_ucode_tlv *tlv;
1125         size_t len = ucode_raw->size;
1126         const u8 *data;
1127         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1128         u64 alternatives;
1129         u32 tlv_len;
1130         enum iwl_ucode_tlv_type tlv_type;
1131         const u8 *tlv_data;
1132
1133         if (len < sizeof(*ucode)) {
1134                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1135                 return -EINVAL;
1136         }
1137
1138         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1139                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1140                         le32_to_cpu(ucode->magic));
1141                 return -EINVAL;
1142         }
1143
1144         /*
1145          * Check which alternatives are present, and "downgrade"
1146          * when the chosen alternative is not present, warning
1147          * the user when that happens. Some files may not have
1148          * any alternatives, so don't warn in that case.
1149          */
1150         alternatives = le64_to_cpu(ucode->alternatives);
1151         tmp = wanted_alternative;
1152         if (wanted_alternative > 63)
1153                 wanted_alternative = 63;
1154         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1155                 wanted_alternative--;
1156         if (wanted_alternative && wanted_alternative != tmp)
1157                 IWL_WARN(priv,
1158                          "uCode alternative %d not available, choosing %d\n",
1159                          tmp, wanted_alternative);
1160
1161         priv->ucode_ver = le32_to_cpu(ucode->ver);
1162         pieces->build = le32_to_cpu(ucode->build);
1163         data = ucode->data;
1164
1165         len -= sizeof(*ucode);
1166
1167         while (len >= sizeof(*tlv)) {
1168                 u16 tlv_alt;
1169
1170                 len -= sizeof(*tlv);
1171                 tlv = (void *)data;
1172
1173                 tlv_len = le32_to_cpu(tlv->length);
1174                 tlv_type = le16_to_cpu(tlv->type);
1175                 tlv_alt = le16_to_cpu(tlv->alternative);
1176                 tlv_data = tlv->data;
1177
1178                 if (len < tlv_len) {
1179                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1180                                 len, tlv_len);
1181                         return -EINVAL;
1182                 }
1183                 len -= ALIGN(tlv_len, 4);
1184                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1185
1186                 /*
1187                  * Alternative 0 is always valid.
1188                  *
1189                  * Skip alternative TLVs that are not selected.
1190                  */
1191                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1192                         continue;
1193
1194                 switch (tlv_type) {
1195                 case IWL_UCODE_TLV_INST:
1196                         pieces->inst = tlv_data;
1197                         pieces->inst_size = tlv_len;
1198                         break;
1199                 case IWL_UCODE_TLV_DATA:
1200                         pieces->data = tlv_data;
1201                         pieces->data_size = tlv_len;
1202                         break;
1203                 case IWL_UCODE_TLV_INIT:
1204                         pieces->init = tlv_data;
1205                         pieces->init_size = tlv_len;
1206                         break;
1207                 case IWL_UCODE_TLV_INIT_DATA:
1208                         pieces->init_data = tlv_data;
1209                         pieces->init_data_size = tlv_len;
1210                         break;
1211                 case IWL_UCODE_TLV_BOOT:
1212                         IWL_ERR(priv, "Found unexpected BOOT ucode\n");
1213                         break;
1214                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1215                         if (tlv_len != sizeof(u32))
1216                                 goto invalid_tlv_len;
1217                         capa->max_probe_length =
1218                                         le32_to_cpup((__le32 *)tlv_data);
1219                         break;
1220                 case IWL_UCODE_TLV_PAN:
1221                         if (tlv_len)
1222                                 goto invalid_tlv_len;
1223                         capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
1224                         break;
1225                 case IWL_UCODE_TLV_FLAGS:
1226                         /* must be at least one u32 */
1227                         if (tlv_len < sizeof(u32))
1228                                 goto invalid_tlv_len;
1229                         /* and a proper number of u32s */
1230                         if (tlv_len % sizeof(u32))
1231                                 goto invalid_tlv_len;
1232                         /*
1233                          * This driver only reads the first u32 as
1234                          * right now no more features are defined,
1235                          * if that changes then either the driver
1236                          * will not work with the new firmware, or
1237                          * it'll not take advantage of new features.
1238                          */
1239                         capa->flags = le32_to_cpup((__le32 *)tlv_data);
1240                         break;
1241                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1242                         if (tlv_len != sizeof(u32))
1243                                 goto invalid_tlv_len;
1244                         pieces->init_evtlog_ptr =
1245                                         le32_to_cpup((__le32 *)tlv_data);
1246                         break;
1247                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1248                         if (tlv_len != sizeof(u32))
1249                                 goto invalid_tlv_len;
1250                         pieces->init_evtlog_size =
1251                                         le32_to_cpup((__le32 *)tlv_data);
1252                         break;
1253                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1254                         if (tlv_len != sizeof(u32))
1255                                 goto invalid_tlv_len;
1256                         pieces->init_errlog_ptr =
1257                                         le32_to_cpup((__le32 *)tlv_data);
1258                         break;
1259                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1260                         if (tlv_len != sizeof(u32))
1261                                 goto invalid_tlv_len;
1262                         pieces->inst_evtlog_ptr =
1263                                         le32_to_cpup((__le32 *)tlv_data);
1264                         break;
1265                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1266                         if (tlv_len != sizeof(u32))
1267                                 goto invalid_tlv_len;
1268                         pieces->inst_evtlog_size =
1269                                         le32_to_cpup((__le32 *)tlv_data);
1270                         break;
1271                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1272                         if (tlv_len != sizeof(u32))
1273                                 goto invalid_tlv_len;
1274                         pieces->inst_errlog_ptr =
1275                                         le32_to_cpup((__le32 *)tlv_data);
1276                         break;
1277                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1278                         if (tlv_len)
1279                                 goto invalid_tlv_len;
1280                         priv->enhance_sensitivity_table = true;
1281                         break;
1282                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1283                         if (tlv_len != sizeof(u32))
1284                                 goto invalid_tlv_len;
1285                         capa->standard_phy_calibration_size =
1286                                         le32_to_cpup((__le32 *)tlv_data);
1287                         break;
1288                 default:
1289                         IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
1290                         break;
1291                 }
1292         }
1293
1294         if (len) {
1295                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1296                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1297                 return -EINVAL;
1298         }
1299
1300         return 0;
1301
1302  invalid_tlv_len:
1303         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1304         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1305
1306         return -EINVAL;
1307 }
1308
1309 /**
1310  * iwl_ucode_callback - callback when firmware was loaded
1311  *
1312  * If loaded successfully, copies the firmware into buffers
1313  * for the card to fetch (via DMA).
1314  */
1315 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1316 {
1317         struct iwl_priv *priv = context;
1318         struct iwl_ucode_header *ucode;
1319         int err;
1320         struct iwlagn_firmware_pieces pieces;
1321         const unsigned int api_max = priv->cfg->ucode_api_max;
1322         const unsigned int api_min = priv->cfg->ucode_api_min;
1323         u32 api_ver;
1324         char buildstr[25];
1325         u32 build;
1326         struct iwlagn_ucode_capabilities ucode_capa = {
1327                 .max_probe_length = 200,
1328                 .standard_phy_calibration_size =
1329                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1330         };
1331
1332         memset(&pieces, 0, sizeof(pieces));
1333
1334         if (!ucode_raw) {
1335                 if (priv->fw_index <= priv->cfg->ucode_api_max)
1336                         IWL_ERR(priv,
1337                                 "request for firmware file '%s' failed.\n",
1338                                 priv->firmware_name);
1339                 goto try_again;
1340         }
1341
1342         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1343                        priv->firmware_name, ucode_raw->size);
1344
1345         /* Make sure that we got at least the API version number */
1346         if (ucode_raw->size < 4) {
1347                 IWL_ERR(priv, "File size way too small!\n");
1348                 goto try_again;
1349         }
1350
1351         /* Data from ucode file:  header followed by uCode images */
1352         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1353
1354         if (ucode->ver)
1355                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1356         else
1357                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1358                                            &ucode_capa);
1359
1360         if (err)
1361                 goto try_again;
1362
1363         api_ver = IWL_UCODE_API(priv->ucode_ver);
1364         build = pieces.build;
1365
1366         /*
1367          * api_ver should match the api version forming part of the
1368          * firmware filename ... but we don't check for that and only rely
1369          * on the API version read from firmware header from here on forward
1370          */
1371         /* no api version check required for experimental uCode */
1372         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1373                 if (api_ver < api_min || api_ver > api_max) {
1374                         IWL_ERR(priv,
1375                                 "Driver unable to support your firmware API. "
1376                                 "Driver supports v%u, firmware is v%u.\n",
1377                                 api_max, api_ver);
1378                         goto try_again;
1379                 }
1380
1381                 if (api_ver != api_max)
1382                         IWL_ERR(priv,
1383                                 "Firmware has old API version. Expected v%u, "
1384                                 "got v%u. New firmware can be obtained "
1385                                 "from http://www.intellinuxwireless.org.\n",
1386                                 api_max, api_ver);
1387         }
1388
1389         if (build)
1390                 sprintf(buildstr, " build %u%s", build,
1391                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1392                                 ? " (EXP)" : "");
1393         else
1394                 buildstr[0] = '\0';
1395
1396         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1397                  IWL_UCODE_MAJOR(priv->ucode_ver),
1398                  IWL_UCODE_MINOR(priv->ucode_ver),
1399                  IWL_UCODE_API(priv->ucode_ver),
1400                  IWL_UCODE_SERIAL(priv->ucode_ver),
1401                  buildstr);
1402
1403         snprintf(priv->hw->wiphy->fw_version,
1404                  sizeof(priv->hw->wiphy->fw_version),
1405                  "%u.%u.%u.%u%s",
1406                  IWL_UCODE_MAJOR(priv->ucode_ver),
1407                  IWL_UCODE_MINOR(priv->ucode_ver),
1408                  IWL_UCODE_API(priv->ucode_ver),
1409                  IWL_UCODE_SERIAL(priv->ucode_ver),
1410                  buildstr);
1411
1412         /*
1413          * For any of the failures below (before allocating pci memory)
1414          * we will try to load a version with a smaller API -- maybe the
1415          * user just got a corrupted version of the latest API.
1416          */
1417
1418         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1419                        priv->ucode_ver);
1420         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1421                        pieces.inst_size);
1422         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1423                        pieces.data_size);
1424         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1425                        pieces.init_size);
1426         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1427                        pieces.init_data_size);
1428
1429         /* Verify that uCode images will fit in card's SRAM */
1430         if (pieces.inst_size > priv->hw_params.max_inst_size) {
1431                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1432                         pieces.inst_size);
1433                 goto try_again;
1434         }
1435
1436         if (pieces.data_size > priv->hw_params.max_data_size) {
1437                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1438                         pieces.data_size);
1439                 goto try_again;
1440         }
1441
1442         if (pieces.init_size > priv->hw_params.max_inst_size) {
1443                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1444                         pieces.init_size);
1445                 goto try_again;
1446         }
1447
1448         if (pieces.init_data_size > priv->hw_params.max_data_size) {
1449                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1450                         pieces.init_data_size);
1451                 goto try_again;
1452         }
1453
1454         /* Allocate ucode buffers for card's bus-master loading ... */
1455
1456         /* Runtime instructions and 2 copies of data:
1457          * 1) unmodified from disk
1458          * 2) backup cache for save/restore during power-downs */
1459         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1460                               pieces.inst, pieces.inst_size))
1461                 goto err_pci_alloc;
1462         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1463                               pieces.data, pieces.data_size))
1464                 goto err_pci_alloc;
1465
1466         /* Initialization instructions and data */
1467         if (pieces.init_size && pieces.init_data_size) {
1468                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1469                                       pieces.init, pieces.init_size))
1470                         goto err_pci_alloc;
1471                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1472                                       pieces.init_data, pieces.init_data_size))
1473                         goto err_pci_alloc;
1474         }
1475
1476         /* Now that we can no longer fail, copy information */
1477
1478         /*
1479          * The (size - 16) / 12 formula is based on the information recorded
1480          * for each event, which is of mode 1 (including timestamp) for all
1481          * new microcodes that include this information.
1482          */
1483         priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1484         if (pieces.init_evtlog_size)
1485                 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1486         else
1487                 priv->_agn.init_evtlog_size =
1488                         priv->cfg->base_params->max_event_log_size;
1489         priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1490         priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1491         if (pieces.inst_evtlog_size)
1492                 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1493         else
1494                 priv->_agn.inst_evtlog_size =
1495                         priv->cfg->base_params->max_event_log_size;
1496         priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1497
1498         priv->new_scan_threshold_behaviour =
1499                 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1500
1501         if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1502             (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1503                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1504                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1505         } else
1506                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1507
1508         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1509                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1510         else
1511                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1512
1513         /*
1514          * figure out the offset of chain noise reset and gain commands
1515          * base on the size of standard phy calibration commands table size
1516          */
1517         if (ucode_capa.standard_phy_calibration_size >
1518             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1519                 ucode_capa.standard_phy_calibration_size =
1520                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1521
1522         priv->_agn.phy_calib_chain_noise_reset_cmd =
1523                 ucode_capa.standard_phy_calibration_size;
1524         priv->_agn.phy_calib_chain_noise_gain_cmd =
1525                 ucode_capa.standard_phy_calibration_size + 1;
1526
1527         /**************************************************
1528          * This is still part of probe() in a sense...
1529          *
1530          * 9. Setup and register with mac80211 and debugfs
1531          **************************************************/
1532         err = iwl_mac_setup_register(priv, &ucode_capa);
1533         if (err)
1534                 goto out_unbind;
1535
1536         err = iwl_dbgfs_register(priv, DRV_NAME);
1537         if (err)
1538                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1539
1540         err = sysfs_create_group(&(priv->bus.dev->kobj),
1541                                         &iwl_attribute_group);
1542         if (err) {
1543                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1544                 goto out_unbind;
1545         }
1546
1547         /* We have our copies now, allow OS release its copies */
1548         release_firmware(ucode_raw);
1549         complete(&priv->_agn.firmware_loading_complete);
1550         return;
1551
1552  try_again:
1553         /* try next, if any */
1554         if (iwl_request_firmware(priv, false))
1555                 goto out_unbind;
1556         release_firmware(ucode_raw);
1557         return;
1558
1559  err_pci_alloc:
1560         IWL_ERR(priv, "failed to allocate pci memory\n");
1561         iwl_dealloc_ucode(priv);
1562  out_unbind:
1563         complete(&priv->_agn.firmware_loading_complete);
1564         device_release_driver(priv->bus.dev);
1565         release_firmware(ucode_raw);
1566 }
1567
1568 static const char * const desc_lookup_text[] = {
1569         "OK",
1570         "FAIL",
1571         "BAD_PARAM",
1572         "BAD_CHECKSUM",
1573         "NMI_INTERRUPT_WDG",
1574         "SYSASSERT",
1575         "FATAL_ERROR",
1576         "BAD_COMMAND",
1577         "HW_ERROR_TUNE_LOCK",
1578         "HW_ERROR_TEMPERATURE",
1579         "ILLEGAL_CHAN_FREQ",
1580         "VCC_NOT_STABLE",
1581         "FH_ERROR",
1582         "NMI_INTERRUPT_HOST",
1583         "NMI_INTERRUPT_ACTION_PT",
1584         "NMI_INTERRUPT_UNKNOWN",
1585         "UCODE_VERSION_MISMATCH",
1586         "HW_ERROR_ABS_LOCK",
1587         "HW_ERROR_CAL_LOCK_FAIL",
1588         "NMI_INTERRUPT_INST_ACTION_PT",
1589         "NMI_INTERRUPT_DATA_ACTION_PT",
1590         "NMI_TRM_HW_ER",
1591         "NMI_INTERRUPT_TRM",
1592         "NMI_INTERRUPT_BREAK_POINT",
1593         "DEBUG_0",
1594         "DEBUG_1",
1595         "DEBUG_2",
1596         "DEBUG_3",
1597 };
1598
1599 static struct { char *name; u8 num; } advanced_lookup[] = {
1600         { "NMI_INTERRUPT_WDG", 0x34 },
1601         { "SYSASSERT", 0x35 },
1602         { "UCODE_VERSION_MISMATCH", 0x37 },
1603         { "BAD_COMMAND", 0x38 },
1604         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1605         { "FATAL_ERROR", 0x3D },
1606         { "NMI_TRM_HW_ERR", 0x46 },
1607         { "NMI_INTERRUPT_TRM", 0x4C },
1608         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1609         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1610         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1611         { "NMI_INTERRUPT_HOST", 0x66 },
1612         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1613         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1614         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1615         { "ADVANCED_SYSASSERT", 0 },
1616 };
1617
1618 static const char *desc_lookup(u32 num)
1619 {
1620         int i;
1621         int max = ARRAY_SIZE(desc_lookup_text);
1622
1623         if (num < max)
1624                 return desc_lookup_text[num];
1625
1626         max = ARRAY_SIZE(advanced_lookup) - 1;
1627         for (i = 0; i < max; i++) {
1628                 if (advanced_lookup[i].num == num)
1629                         break;
1630         }
1631         return advanced_lookup[i].name;
1632 }
1633
1634 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1635 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1636
1637 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1638 {
1639         u32 base;
1640         struct iwl_error_event_table table;
1641
1642         base = priv->device_pointers.error_event_table;
1643         if (priv->ucode_type == IWL_UCODE_INIT) {
1644                 if (!base)
1645                         base = priv->_agn.init_errlog_ptr;
1646         } else {
1647                 if (!base)
1648                         base = priv->_agn.inst_errlog_ptr;
1649         }
1650
1651         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1652                 IWL_ERR(priv,
1653                         "Not valid error log pointer 0x%08X for %s uCode\n",
1654                         base,
1655                         (priv->ucode_type == IWL_UCODE_INIT)
1656                                         ? "Init" : "RT");
1657                 return;
1658         }
1659
1660         iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1661
1662         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1663                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1664                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1665                         priv->status, table.valid);
1666         }
1667
1668         priv->isr_stats.err_code = table.error_id;
1669
1670         trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1671                                       table.data1, table.data2, table.line,
1672                                       table.blink1, table.blink2, table.ilink1,
1673                                       table.ilink2, table.bcon_time, table.gp1,
1674                                       table.gp2, table.gp3, table.ucode_ver,
1675                                       table.hw_ver, table.brd_ver);
1676         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1677                 desc_lookup(table.error_id));
1678         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1679         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1680         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1681         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1682         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1683         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1684         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1685         IWL_ERR(priv, "0x%08X | line\n", table.line);
1686         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1687         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1688         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1689         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1690         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1691         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1692         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1693         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1694         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1695         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1696 }
1697
1698 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1699
1700 /**
1701  * iwl_print_event_log - Dump error event log to syslog
1702  *
1703  */
1704 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1705                                u32 num_events, u32 mode,
1706                                int pos, char **buf, size_t bufsz)
1707 {
1708         u32 i;
1709         u32 base;       /* SRAM byte address of event log header */
1710         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1711         u32 ptr;        /* SRAM byte address of log data */
1712         u32 ev, time, data; /* event log data */
1713         unsigned long reg_flags;
1714
1715         if (num_events == 0)
1716                 return pos;
1717
1718         base = priv->device_pointers.log_event_table;
1719         if (priv->ucode_type == IWL_UCODE_INIT) {
1720                 if (!base)
1721                         base = priv->_agn.init_evtlog_ptr;
1722         } else {
1723                 if (!base)
1724                         base = priv->_agn.inst_evtlog_ptr;
1725         }
1726
1727         if (mode == 0)
1728                 event_size = 2 * sizeof(u32);
1729         else
1730                 event_size = 3 * sizeof(u32);
1731
1732         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1733
1734         /* Make sure device is powered up for SRAM reads */
1735         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1736         iwl_grab_nic_access(priv);
1737
1738         /* Set starting address; reads will auto-increment */
1739         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1740         rmb();
1741
1742         /* "time" is actually "data" for mode 0 (no timestamp).
1743         * place event id # at far right for easier visual parsing. */
1744         for (i = 0; i < num_events; i++) {
1745                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1746                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1747                 if (mode == 0) {
1748                         /* data, ev */
1749                         if (bufsz) {
1750                                 pos += scnprintf(*buf + pos, bufsz - pos,
1751                                                 "EVT_LOG:0x%08x:%04u\n",
1752                                                 time, ev);
1753                         } else {
1754                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1755                                         time, ev);
1756                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1757                                         time, ev);
1758                         }
1759                 } else {
1760                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1761                         if (bufsz) {
1762                                 pos += scnprintf(*buf + pos, bufsz - pos,
1763                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1764                                                  time, data, ev);
1765                         } else {
1766                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1767                                         time, data, ev);
1768                                 trace_iwlwifi_dev_ucode_event(priv, time,
1769                                         data, ev);
1770                         }
1771                 }
1772         }
1773
1774         /* Allow device to power down */
1775         iwl_release_nic_access(priv);
1776         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1777         return pos;
1778 }
1779
1780 /**
1781  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1782  */
1783 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1784                                     u32 num_wraps, u32 next_entry,
1785                                     u32 size, u32 mode,
1786                                     int pos, char **buf, size_t bufsz)
1787 {
1788         /*
1789          * display the newest DEFAULT_LOG_ENTRIES entries
1790          * i.e the entries just before the next ont that uCode would fill.
1791          */
1792         if (num_wraps) {
1793                 if (next_entry < size) {
1794                         pos = iwl_print_event_log(priv,
1795                                                 capacity - (size - next_entry),
1796                                                 size - next_entry, mode,
1797                                                 pos, buf, bufsz);
1798                         pos = iwl_print_event_log(priv, 0,
1799                                                   next_entry, mode,
1800                                                   pos, buf, bufsz);
1801                 } else
1802                         pos = iwl_print_event_log(priv, next_entry - size,
1803                                                   size, mode, pos, buf, bufsz);
1804         } else {
1805                 if (next_entry < size) {
1806                         pos = iwl_print_event_log(priv, 0, next_entry,
1807                                                   mode, pos, buf, bufsz);
1808                 } else {
1809                         pos = iwl_print_event_log(priv, next_entry - size,
1810                                                   size, mode, pos, buf, bufsz);
1811                 }
1812         }
1813         return pos;
1814 }
1815
1816 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1817
1818 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1819                             char **buf, bool display)
1820 {
1821         u32 base;       /* SRAM byte address of event log header */
1822         u32 capacity;   /* event log capacity in # entries */
1823         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1824         u32 num_wraps;  /* # times uCode wrapped to top of log */
1825         u32 next_entry; /* index of next entry to be written by uCode */
1826         u32 size;       /* # entries that we'll print */
1827         u32 logsize;
1828         int pos = 0;
1829         size_t bufsz = 0;
1830
1831         base = priv->device_pointers.log_event_table;
1832         if (priv->ucode_type == IWL_UCODE_INIT) {
1833                 logsize = priv->_agn.init_evtlog_size;
1834                 if (!base)
1835                         base = priv->_agn.init_evtlog_ptr;
1836         } else {
1837                 logsize = priv->_agn.inst_evtlog_size;
1838                 if (!base)
1839                         base = priv->_agn.inst_evtlog_ptr;
1840         }
1841
1842         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1843                 IWL_ERR(priv,
1844                         "Invalid event log pointer 0x%08X for %s uCode\n",
1845                         base,
1846                         (priv->ucode_type == IWL_UCODE_INIT)
1847                                         ? "Init" : "RT");
1848                 return -EINVAL;
1849         }
1850
1851         /* event log header */
1852         capacity = iwl_read_targ_mem(priv, base);
1853         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1854         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1855         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1856
1857         if (capacity > logsize) {
1858                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1859                         capacity, logsize);
1860                 capacity = logsize;
1861         }
1862
1863         if (next_entry > logsize) {
1864                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1865                         next_entry, logsize);
1866                 next_entry = logsize;
1867         }
1868
1869         size = num_wraps ? capacity : next_entry;
1870
1871         /* bail out if nothing in log */
1872         if (size == 0) {
1873                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1874                 return pos;
1875         }
1876
1877         /* enable/disable bt channel inhibition */
1878         priv->bt_ch_announce = iwlagn_bt_ch_announce;
1879
1880 #ifdef CONFIG_IWLWIFI_DEBUG
1881         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1882                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1883                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1884 #else
1885         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1886                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1887 #endif
1888         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1889                 size);
1890
1891 #ifdef CONFIG_IWLWIFI_DEBUG
1892         if (display) {
1893                 if (full_log)
1894                         bufsz = capacity * 48;
1895                 else
1896                         bufsz = size * 48;
1897                 *buf = kmalloc(bufsz, GFP_KERNEL);
1898                 if (!*buf)
1899                         return -ENOMEM;
1900         }
1901         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1902                 /*
1903                  * if uCode has wrapped back to top of log,
1904                  * start at the oldest entry,
1905                  * i.e the next one that uCode would fill.
1906                  */
1907                 if (num_wraps)
1908                         pos = iwl_print_event_log(priv, next_entry,
1909                                                 capacity - next_entry, mode,
1910                                                 pos, buf, bufsz);
1911                 /* (then/else) start at top of log */
1912                 pos = iwl_print_event_log(priv, 0,
1913                                           next_entry, mode, pos, buf, bufsz);
1914         } else
1915                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1916                                                 next_entry, size, mode,
1917                                                 pos, buf, bufsz);
1918 #else
1919         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1920                                         next_entry, size, mode,
1921                                         pos, buf, bufsz);
1922 #endif
1923         return pos;
1924 }
1925
1926 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1927 {
1928         struct iwl_ct_kill_config cmd;
1929         struct iwl_ct_kill_throttling_config adv_cmd;
1930         unsigned long flags;
1931         int ret = 0;
1932
1933         spin_lock_irqsave(&priv->lock, flags);
1934         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1935                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1936         spin_unlock_irqrestore(&priv->lock, flags);
1937         priv->thermal_throttle.ct_kill_toggle = false;
1938
1939         if (priv->cfg->base_params->support_ct_kill_exit) {
1940                 adv_cmd.critical_temperature_enter =
1941                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1942                 adv_cmd.critical_temperature_exit =
1943                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1944
1945                 ret = trans_send_cmd_pdu(priv,
1946                                        REPLY_CT_KILL_CONFIG_CMD,
1947                                        CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
1948                 if (ret)
1949                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1950                 else
1951                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1952                                         "succeeded, "
1953                                         "critical temperature enter is %d,"
1954                                         "exit is %d\n",
1955                                        priv->hw_params.ct_kill_threshold,
1956                                        priv->hw_params.ct_kill_exit_threshold);
1957         } else {
1958                 cmd.critical_temperature_R =
1959                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1960
1961                 ret = trans_send_cmd_pdu(priv,
1962                                        REPLY_CT_KILL_CONFIG_CMD,
1963                                        CMD_SYNC, sizeof(cmd), &cmd);
1964                 if (ret)
1965                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1966                 else
1967                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1968                                         "succeeded, "
1969                                         "critical temperature is %d\n",
1970                                         priv->hw_params.ct_kill_threshold);
1971         }
1972 }
1973
1974 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1975 {
1976         struct iwl_calib_cfg_cmd calib_cfg_cmd;
1977         struct iwl_host_cmd cmd = {
1978                 .id = CALIBRATION_CFG_CMD,
1979                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1980                 .data = { &calib_cfg_cmd, },
1981         };
1982
1983         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1984         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1985         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1986
1987         return trans_send_cmd(priv, &cmd);
1988 }
1989
1990
1991 /**
1992  * iwl_alive_start - called after REPLY_ALIVE notification received
1993  *                   from protocol/runtime uCode (initialization uCode's
1994  *                   Alive gets handled by iwl_init_alive_start()).
1995  */
1996 int iwl_alive_start(struct iwl_priv *priv)
1997 {
1998         int ret = 0;
1999         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2000
2001         iwl_reset_ict(priv);
2002
2003         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2004
2005         /* After the ALIVE response, we can send host commands to the uCode */
2006         set_bit(STATUS_ALIVE, &priv->status);
2007
2008         /* Enable watchdog to monitor the driver tx queues */
2009         iwl_setup_watchdog(priv);
2010
2011         if (iwl_is_rfkill(priv))
2012                 return -ERFKILL;
2013
2014         /* download priority table before any calibration request */
2015         if (priv->cfg->bt_params &&
2016             priv->cfg->bt_params->advanced_bt_coexist) {
2017                 /* Configure Bluetooth device coexistence support */
2018                 if (priv->cfg->bt_params->bt_sco_disable)
2019                         priv->bt_enable_pspoll = false;
2020                 else
2021                         priv->bt_enable_pspoll = true;
2022
2023                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2024                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2025                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2026                 iwlagn_send_advance_bt_config(priv);
2027                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2028                 priv->cur_rssi_ctx = NULL;
2029
2030                 iwlagn_send_prio_tbl(priv);
2031
2032                 /* FIXME: w/a to force change uCode BT state machine */
2033                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2034                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2035                 if (ret)
2036                         return ret;
2037                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2038                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2039                 if (ret)
2040                         return ret;
2041         } else {
2042                 /*
2043                  * default is 2-wire BT coexexistence support
2044                  */
2045                 iwl_send_bt_config(priv);
2046         }
2047
2048         if (priv->hw_params.calib_rt_cfg)
2049                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2050
2051         ieee80211_wake_queues(priv->hw);
2052
2053         priv->active_rate = IWL_RATES_MASK;
2054
2055         /* Configure Tx antenna selection based on H/W config */
2056         iwlagn_send_tx_ant_config(priv, priv->cfg->valid_tx_ant);
2057
2058         if (iwl_is_associated_ctx(ctx)) {
2059                 struct iwl_rxon_cmd *active_rxon =
2060                                 (struct iwl_rxon_cmd *)&ctx->active;
2061                 /* apply any changes in staging */
2062                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2063                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2064         } else {
2065                 struct iwl_rxon_context *tmp;
2066                 /* Initialize our rx_config data */
2067                 for_each_context(priv, tmp)
2068                         iwl_connection_init_rx_config(priv, tmp);
2069
2070                 iwlagn_set_rxon_chain(priv, ctx);
2071         }
2072
2073         iwl_reset_run_time_calib(priv);
2074
2075         set_bit(STATUS_READY, &priv->status);
2076
2077         /* Configure the adapter for unassociated operation */
2078         ret = iwlagn_commit_rxon(priv, ctx);
2079         if (ret)
2080                 return ret;
2081
2082         /* At this point, the NIC is initialized and operational */
2083         iwl_rf_kill_ct_config(priv);
2084
2085         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2086
2087         return iwl_power_update_mode(priv, true);
2088 }
2089
2090 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2091
2092 static void __iwl_down(struct iwl_priv *priv)
2093 {
2094         int exit_pending;
2095
2096         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2097
2098         iwl_scan_cancel_timeout(priv, 200);
2099
2100         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2101
2102         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2103          * to prevent rearm timer */
2104         del_timer_sync(&priv->watchdog);
2105
2106         iwl_clear_ucode_stations(priv, NULL);
2107         iwl_dealloc_bcast_stations(priv);
2108         iwl_clear_driver_stations(priv);
2109
2110         /* reset BT coex data */
2111         priv->bt_status = 0;
2112         priv->cur_rssi_ctx = NULL;
2113         priv->bt_is_sco = 0;
2114         if (priv->cfg->bt_params)
2115                 priv->bt_traffic_load =
2116                          priv->cfg->bt_params->bt_init_traffic_load;
2117         else
2118                 priv->bt_traffic_load = 0;
2119         priv->bt_full_concurrent = false;
2120         priv->bt_ci_compliance = 0;
2121
2122         /* Wipe out the EXIT_PENDING status bit if we are not actually
2123          * exiting the module */
2124         if (!exit_pending)
2125                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2126
2127         if (priv->mac80211_registered)
2128                 ieee80211_stop_queues(priv->hw);
2129
2130         /* Clear out all status bits but a few that are stable across reset */
2131         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2132                                 STATUS_RF_KILL_HW |
2133                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2134                                 STATUS_GEO_CONFIGURED |
2135                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2136                                 STATUS_FW_ERROR |
2137                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2138                                 STATUS_EXIT_PENDING;
2139
2140         iwlagn_stop_device(priv);
2141
2142         dev_kfree_skb(priv->beacon_skb);
2143         priv->beacon_skb = NULL;
2144 }
2145
2146 static void iwl_down(struct iwl_priv *priv)
2147 {
2148         mutex_lock(&priv->mutex);
2149         __iwl_down(priv);
2150         mutex_unlock(&priv->mutex);
2151
2152         iwl_cancel_deferred_work(priv);
2153 }
2154
2155 #define HW_READY_TIMEOUT (50)
2156
2157 /* Note: returns poll_bit return value, which is >= 0 if success */
2158 static int iwl_set_hw_ready(struct iwl_priv *priv)
2159 {
2160         int ret;
2161
2162         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2163                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2164
2165         /* See if we got it */
2166         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2167                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2168                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2169                                 HW_READY_TIMEOUT);
2170
2171         IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
2172         return ret;
2173 }
2174
2175 /* Note: returns standard 0/-ERROR code */
2176 int iwl_prepare_card_hw(struct iwl_priv *priv)
2177 {
2178         int ret;
2179
2180         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2181
2182         ret = iwl_set_hw_ready(priv);
2183         if (ret >= 0)
2184                 return 0;
2185
2186         /* If HW is not ready, prepare the conditions to check again */
2187         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2188                         CSR_HW_IF_CONFIG_REG_PREPARE);
2189
2190         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2191                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2192                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2193
2194         if (ret < 0)
2195                 return ret;
2196
2197         /* HW should be ready by now, check again. */
2198         ret = iwl_set_hw_ready(priv);
2199         if (ret >= 0)
2200                 return 0;
2201         return ret;
2202 }
2203
2204 #define MAX_HW_RESTARTS 5
2205
2206 static int __iwl_up(struct iwl_priv *priv)
2207 {
2208         struct iwl_rxon_context *ctx;
2209         int ret;
2210
2211         lockdep_assert_held(&priv->mutex);
2212
2213         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2214                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2215                 return -EIO;
2216         }
2217
2218         for_each_context(priv, ctx) {
2219                 ret = iwlagn_alloc_bcast_station(priv, ctx);
2220                 if (ret) {
2221                         iwl_dealloc_bcast_stations(priv);
2222                         return ret;
2223                 }
2224         }
2225
2226         ret = iwlagn_run_init_ucode(priv);
2227         if (ret) {
2228                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
2229                 goto error;
2230         }
2231
2232         ret = iwlagn_load_ucode_wait_alive(priv,
2233                                            &priv->ucode_rt,
2234                                            IWL_UCODE_REGULAR);
2235         if (ret) {
2236                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
2237                 goto error;
2238         }
2239
2240         ret = iwl_alive_start(priv);
2241         if (ret)
2242                 goto error;
2243         return 0;
2244
2245  error:
2246         set_bit(STATUS_EXIT_PENDING, &priv->status);
2247         __iwl_down(priv);
2248         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2249
2250         IWL_ERR(priv, "Unable to initialize device.\n");
2251         return ret;
2252 }
2253
2254
2255 /*****************************************************************************
2256  *
2257  * Workqueue callbacks
2258  *
2259  *****************************************************************************/
2260
2261 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2262 {
2263         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2264                         run_time_calib_work);
2265
2266         mutex_lock(&priv->mutex);
2267
2268         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2269             test_bit(STATUS_SCANNING, &priv->status)) {
2270                 mutex_unlock(&priv->mutex);
2271                 return;
2272         }
2273
2274         if (priv->start_calib) {
2275                 iwl_chain_noise_calibration(priv);
2276                 iwl_sensitivity_calibration(priv);
2277         }
2278
2279         mutex_unlock(&priv->mutex);
2280 }
2281
2282 static void iwlagn_prepare_restart(struct iwl_priv *priv)
2283 {
2284         struct iwl_rxon_context *ctx;
2285         bool bt_full_concurrent;
2286         u8 bt_ci_compliance;
2287         u8 bt_load;
2288         u8 bt_status;
2289         bool bt_is_sco;
2290
2291         lockdep_assert_held(&priv->mutex);
2292
2293         for_each_context(priv, ctx)
2294                 ctx->vif = NULL;
2295         priv->is_open = 0;
2296
2297         /*
2298          * __iwl_down() will clear the BT status variables,
2299          * which is correct, but when we restart we really
2300          * want to keep them so restore them afterwards.
2301          *
2302          * The restart process will later pick them up and
2303          * re-configure the hw when we reconfigure the BT
2304          * command.
2305          */
2306         bt_full_concurrent = priv->bt_full_concurrent;
2307         bt_ci_compliance = priv->bt_ci_compliance;
2308         bt_load = priv->bt_traffic_load;
2309         bt_status = priv->bt_status;
2310         bt_is_sco = priv->bt_is_sco;
2311
2312         __iwl_down(priv);
2313
2314         priv->bt_full_concurrent = bt_full_concurrent;
2315         priv->bt_ci_compliance = bt_ci_compliance;
2316         priv->bt_traffic_load = bt_load;
2317         priv->bt_status = bt_status;
2318         priv->bt_is_sco = bt_is_sco;
2319 }
2320
2321 static void iwl_bg_restart(struct work_struct *data)
2322 {
2323         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2324
2325         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2326                 return;
2327
2328         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2329                 mutex_lock(&priv->mutex);
2330                 iwlagn_prepare_restart(priv);
2331                 mutex_unlock(&priv->mutex);
2332                 iwl_cancel_deferred_work(priv);
2333                 ieee80211_restart_hw(priv->hw);
2334         } else {
2335                 WARN_ON(1);
2336         }
2337 }
2338
2339 static void iwl_bg_rx_replenish(struct work_struct *data)
2340 {
2341         struct iwl_priv *priv =
2342             container_of(data, struct iwl_priv, rx_replenish);
2343
2344         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2345                 return;
2346
2347         mutex_lock(&priv->mutex);
2348         iwlagn_rx_replenish(priv);
2349         mutex_unlock(&priv->mutex);
2350 }
2351
2352 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2353                                  struct ieee80211_channel *chan,
2354                                  enum nl80211_channel_type channel_type,
2355                                  unsigned int wait)
2356 {
2357         struct iwl_priv *priv = hw->priv;
2358         int ret;
2359
2360         /* Not supported if we don't have PAN */
2361         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2362                 ret = -EOPNOTSUPP;
2363                 goto free;
2364         }
2365
2366         /* Not supported on pre-P2P firmware */
2367         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2368                                         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2369                 ret = -EOPNOTSUPP;
2370                 goto free;
2371         }
2372
2373         mutex_lock(&priv->mutex);
2374
2375         if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2376                 /*
2377                  * If the PAN context is free, use the normal
2378                  * way of doing remain-on-channel offload + TX.
2379                  */
2380                 ret = 1;
2381                 goto out;
2382         }
2383
2384         /* TODO: queue up if scanning? */
2385         if (test_bit(STATUS_SCANNING, &priv->status) ||
2386             priv->_agn.offchan_tx_skb) {
2387                 ret = -EBUSY;
2388                 goto out;
2389         }
2390
2391         /*
2392          * max_scan_ie_len doesn't include the blank SSID or the header,
2393          * so need to add that again here.
2394          */
2395         if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2396                 ret = -ENOBUFS;
2397                 goto out;
2398         }
2399
2400         priv->_agn.offchan_tx_skb = skb;
2401         priv->_agn.offchan_tx_timeout = wait;
2402         priv->_agn.offchan_tx_chan = chan;
2403
2404         ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2405                                 IWL_SCAN_OFFCH_TX, chan->band);
2406         if (ret)
2407                 priv->_agn.offchan_tx_skb = NULL;
2408  out:
2409         mutex_unlock(&priv->mutex);
2410  free:
2411         if (ret < 0)
2412                 kfree_skb(skb);
2413
2414         return ret;
2415 }
2416
2417 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2418 {
2419         struct iwl_priv *priv = hw->priv;
2420         int ret;
2421
2422         mutex_lock(&priv->mutex);
2423
2424         if (!priv->_agn.offchan_tx_skb) {
2425                 ret = -EINVAL;
2426                 goto unlock;
2427         }
2428
2429         priv->_agn.offchan_tx_skb = NULL;
2430
2431         ret = iwl_scan_cancel_timeout(priv, 200);
2432         if (ret)
2433                 ret = -EIO;
2434 unlock:
2435         mutex_unlock(&priv->mutex);
2436
2437         return ret;
2438 }
2439
2440 /*****************************************************************************
2441  *
2442  * mac80211 entry point functions
2443  *
2444  *****************************************************************************/
2445
2446 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2447         {
2448                 .max = 1,
2449                 .types = BIT(NL80211_IFTYPE_STATION),
2450         },
2451         {
2452                 .max = 1,
2453                 .types = BIT(NL80211_IFTYPE_AP),
2454         },
2455 };
2456
2457 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2458         {
2459                 .max = 2,
2460                 .types = BIT(NL80211_IFTYPE_STATION),
2461         },
2462 };
2463
2464 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2465         {
2466                 .max = 1,
2467                 .types = BIT(NL80211_IFTYPE_STATION),
2468         },
2469         {
2470                 .max = 1,
2471                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2472                          BIT(NL80211_IFTYPE_AP),
2473         },
2474 };
2475
2476 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2477         {
2478                 .max = 2,
2479                 .types = BIT(NL80211_IFTYPE_STATION),
2480         },
2481         {
2482                 .max = 1,
2483                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2484         },
2485 };
2486
2487 static const struct ieee80211_iface_combination
2488 iwlagn_iface_combinations_dualmode[] = {
2489         { .num_different_channels = 1,
2490           .max_interfaces = 2,
2491           .beacon_int_infra_match = true,
2492           .limits = iwlagn_sta_ap_limits,
2493           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2494         },
2495         { .num_different_channels = 1,
2496           .max_interfaces = 2,
2497           .limits = iwlagn_2sta_limits,
2498           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2499         },
2500 };
2501
2502 static const struct ieee80211_iface_combination
2503 iwlagn_iface_combinations_p2p[] = {
2504         { .num_different_channels = 1,
2505           .max_interfaces = 2,
2506           .beacon_int_infra_match = true,
2507           .limits = iwlagn_p2p_sta_go_limits,
2508           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2509         },
2510         { .num_different_channels = 1,
2511           .max_interfaces = 2,
2512           .limits = iwlagn_p2p_2sta_limits,
2513           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2514         },
2515 };
2516
2517 /*
2518  * Not a mac80211 entry point function, but it fits in with all the
2519  * other mac80211 functions grouped here.
2520  */
2521 static int iwl_mac_setup_register(struct iwl_priv *priv,
2522                                   struct iwlagn_ucode_capabilities *capa)
2523 {
2524         int ret;
2525         struct ieee80211_hw *hw = priv->hw;
2526         struct iwl_rxon_context *ctx;
2527
2528         hw->rate_control_algorithm = "iwl-agn-rs";
2529
2530         /* Tell mac80211 our characteristics */
2531         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2532                     IEEE80211_HW_AMPDU_AGGREGATION |
2533                     IEEE80211_HW_NEED_DTIM_PERIOD |
2534                     IEEE80211_HW_SPECTRUM_MGMT |
2535                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2536
2537         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2538
2539         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2540                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2541
2542         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2543                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2544                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2545
2546         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2547                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2548
2549         hw->sta_data_size = sizeof(struct iwl_station_priv);
2550         hw->vif_data_size = sizeof(struct iwl_vif_priv);
2551
2552         for_each_context(priv, ctx) {
2553                 hw->wiphy->interface_modes |= ctx->interface_modes;
2554                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2555         }
2556
2557         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2558
2559         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2560                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2561                 hw->wiphy->n_iface_combinations =
2562                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2563         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2564                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2565                 hw->wiphy->n_iface_combinations =
2566                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2567         }
2568
2569         hw->wiphy->max_remain_on_channel_duration = 1000;
2570
2571         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2572                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
2573                             WIPHY_FLAG_IBSS_RSN;
2574
2575         if (iwlagn_mod_params.power_save)
2576                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2577         else
2578                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2579
2580         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2581         /* we create the 802.11 header and a zero-length SSID element */
2582         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2583
2584         /* Default value; 4 EDCA QOS priorities */
2585         hw->queues = 4;
2586
2587         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2588
2589         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2590                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2591                         &priv->bands[IEEE80211_BAND_2GHZ];
2592         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2593                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2594                         &priv->bands[IEEE80211_BAND_5GHZ];
2595
2596         iwl_leds_init(priv);
2597
2598         ret = ieee80211_register_hw(priv->hw);
2599         if (ret) {
2600                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2601                 return ret;
2602         }
2603         priv->mac80211_registered = 1;
2604
2605         return 0;
2606 }
2607
2608
2609 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2610 {
2611         struct iwl_priv *priv = hw->priv;
2612         int ret;
2613
2614         IWL_DEBUG_MAC80211(priv, "enter\n");
2615
2616         /* we should be verifying the device is ready to be opened */
2617         mutex_lock(&priv->mutex);
2618         ret = __iwl_up(priv);
2619         mutex_unlock(&priv->mutex);
2620         if (ret)
2621                 return ret;
2622
2623         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2624
2625         /* Now we should be done, and the READY bit should be set. */
2626         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2627                 ret = -EIO;
2628
2629         iwlagn_led_enable(priv);
2630
2631         priv->is_open = 1;
2632         IWL_DEBUG_MAC80211(priv, "leave\n");
2633         return 0;
2634 }
2635
2636 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2637 {
2638         struct iwl_priv *priv = hw->priv;
2639
2640         IWL_DEBUG_MAC80211(priv, "enter\n");
2641
2642         if (!priv->is_open)
2643                 return;
2644
2645         priv->is_open = 0;
2646
2647         iwl_down(priv);
2648
2649         flush_workqueue(priv->workqueue);
2650
2651         /* User space software may expect getting rfkill changes
2652          * even if interface is down */
2653         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2654         iwl_enable_rfkill_int(priv);
2655
2656         IWL_DEBUG_MAC80211(priv, "leave\n");
2657 }
2658
2659 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2660 {
2661         struct iwl_priv *priv = hw->priv;
2662
2663         IWL_DEBUG_MACDUMP(priv, "enter\n");
2664
2665         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2666                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2667
2668         if (iwlagn_tx_skb(priv, skb))
2669                 dev_kfree_skb_any(skb);
2670
2671         IWL_DEBUG_MACDUMP(priv, "leave\n");
2672 }
2673
2674 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2675                                        struct ieee80211_vif *vif,
2676                                        struct ieee80211_key_conf *keyconf,
2677                                        struct ieee80211_sta *sta,
2678                                        u32 iv32, u16 *phase1key)
2679 {
2680         struct iwl_priv *priv = hw->priv;
2681         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2682
2683         IWL_DEBUG_MAC80211(priv, "enter\n");
2684
2685         iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2686                             iv32, phase1key);
2687
2688         IWL_DEBUG_MAC80211(priv, "leave\n");
2689 }
2690
2691 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2692                               struct ieee80211_vif *vif,
2693                               struct ieee80211_sta *sta,
2694                               struct ieee80211_key_conf *key)
2695 {
2696         struct iwl_priv *priv = hw->priv;
2697         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2698         struct iwl_rxon_context *ctx = vif_priv->ctx;
2699         int ret;
2700         u8 sta_id;
2701         bool is_default_wep_key = false;
2702
2703         IWL_DEBUG_MAC80211(priv, "enter\n");
2704
2705         if (iwlagn_mod_params.sw_crypto) {
2706                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2707                 return -EOPNOTSUPP;
2708         }
2709
2710         /*
2711          * To support IBSS RSN, don't program group keys in IBSS, the
2712          * hardware will then not attempt to decrypt the frames.
2713          */
2714         if (vif->type == NL80211_IFTYPE_ADHOC &&
2715             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2716                 return -EOPNOTSUPP;
2717
2718         sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2719         if (sta_id == IWL_INVALID_STATION)
2720                 return -EINVAL;
2721
2722         mutex_lock(&priv->mutex);
2723         iwl_scan_cancel_timeout(priv, 100);
2724
2725         /*
2726          * If we are getting WEP group key and we didn't receive any key mapping
2727          * so far, we are in legacy wep mode (group key only), otherwise we are
2728          * in 1X mode.
2729          * In legacy wep mode, we use another host command to the uCode.
2730          */
2731         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2732              key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2733             !sta) {
2734                 if (cmd == SET_KEY)
2735                         is_default_wep_key = !ctx->key_mapping_keys;
2736                 else
2737                         is_default_wep_key =
2738                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2739         }
2740
2741         switch (cmd) {
2742         case SET_KEY:
2743                 if (is_default_wep_key)
2744                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2745                 else
2746                         ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2747                                                   key, sta_id);
2748
2749                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2750                 break;
2751         case DISABLE_KEY:
2752                 if (is_default_wep_key)
2753                         ret = iwl_remove_default_wep_key(priv, ctx, key);
2754                 else
2755                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2756
2757                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2758                 break;
2759         default:
2760                 ret = -EINVAL;
2761         }
2762
2763         mutex_unlock(&priv->mutex);
2764         IWL_DEBUG_MAC80211(priv, "leave\n");
2765
2766         return ret;
2767 }
2768
2769 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2770                                    struct ieee80211_vif *vif,
2771                                    enum ieee80211_ampdu_mlme_action action,
2772                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2773                                    u8 buf_size)
2774 {
2775         struct iwl_priv *priv = hw->priv;
2776         int ret = -EINVAL;
2777         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2778
2779         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2780                      sta->addr, tid);
2781
2782         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2783                 return -EACCES;
2784
2785         mutex_lock(&priv->mutex);
2786
2787         switch (action) {
2788         case IEEE80211_AMPDU_RX_START:
2789                 IWL_DEBUG_HT(priv, "start Rx\n");
2790                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2791                 break;
2792         case IEEE80211_AMPDU_RX_STOP:
2793                 IWL_DEBUG_HT(priv, "stop Rx\n");
2794                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2795                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2796                         ret = 0;
2797                 break;
2798         case IEEE80211_AMPDU_TX_START:
2799                 IWL_DEBUG_HT(priv, "start Tx\n");
2800                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2801                 if (ret == 0) {
2802                         priv->_agn.agg_tids_count++;
2803                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2804                                      priv->_agn.agg_tids_count);
2805                 }
2806                 break;
2807         case IEEE80211_AMPDU_TX_STOP:
2808                 IWL_DEBUG_HT(priv, "stop Tx\n");
2809                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2810                 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2811                         priv->_agn.agg_tids_count--;
2812                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2813                                      priv->_agn.agg_tids_count);
2814                 }
2815                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2816                         ret = 0;
2817                 if (priv->cfg->ht_params &&
2818                     priv->cfg->ht_params->use_rts_for_aggregation) {
2819                         /*
2820                          * switch off RTS/CTS if it was previously enabled
2821                          */
2822                         sta_priv->lq_sta.lq.general_params.flags &=
2823                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2824                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2825                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2826                 }
2827                 break;
2828         case IEEE80211_AMPDU_TX_OPERATIONAL:
2829                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2830
2831                 iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
2832
2833                 /*
2834                  * If the limit is 0, then it wasn't initialised yet,
2835                  * use the default. We can do that since we take the
2836                  * minimum below, and we don't want to go above our
2837                  * default due to hardware restrictions.
2838                  */
2839                 if (sta_priv->max_agg_bufsize == 0)
2840                         sta_priv->max_agg_bufsize =
2841                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2842
2843                 /*
2844                  * Even though in theory the peer could have different
2845                  * aggregation reorder buffer sizes for different sessions,
2846                  * our ucode doesn't allow for that and has a global limit
2847                  * for each station. Therefore, use the minimum of all the
2848                  * aggregation sessions and our default value.
2849                  */
2850                 sta_priv->max_agg_bufsize =
2851                         min(sta_priv->max_agg_bufsize, buf_size);
2852
2853                 if (priv->cfg->ht_params &&
2854                     priv->cfg->ht_params->use_rts_for_aggregation) {
2855                         /*
2856                          * switch to RTS/CTS if it is the prefer protection
2857                          * method for HT traffic
2858                          */
2859
2860                         sta_priv->lq_sta.lq.general_params.flags |=
2861                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2862                 }
2863
2864                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2865                         sta_priv->max_agg_bufsize;
2866
2867                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2868                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2869
2870                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2871                          sta->addr, tid);
2872                 ret = 0;
2873                 break;
2874         }
2875         mutex_unlock(&priv->mutex);
2876
2877         return ret;
2878 }
2879
2880 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2881                               struct ieee80211_vif *vif,
2882                               struct ieee80211_sta *sta)
2883 {
2884         struct iwl_priv *priv = hw->priv;
2885         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2886         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2887         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2888         int ret;
2889         u8 sta_id;
2890
2891         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2892                         sta->addr);
2893         mutex_lock(&priv->mutex);
2894         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2895                         sta->addr);
2896         sta_priv->common.sta_id = IWL_INVALID_STATION;
2897
2898         atomic_set(&sta_priv->pending_frames, 0);
2899         if (vif->type == NL80211_IFTYPE_AP)
2900                 sta_priv->client = true;
2901
2902         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2903                                      is_ap, sta, &sta_id);
2904         if (ret) {
2905                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2906                         sta->addr, ret);
2907                 /* Should we return success if return code is EEXIST ? */
2908                 mutex_unlock(&priv->mutex);
2909                 return ret;
2910         }
2911
2912         sta_priv->common.sta_id = sta_id;
2913
2914         /* Initialize rate scaling */
2915         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2916                        sta->addr);
2917         iwl_rs_rate_init(priv, sta, sta_id);
2918         mutex_unlock(&priv->mutex);
2919
2920         return 0;
2921 }
2922
2923 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2924                                 struct ieee80211_channel_switch *ch_switch)
2925 {
2926         struct iwl_priv *priv = hw->priv;
2927         const struct iwl_channel_info *ch_info;
2928         struct ieee80211_conf *conf = &hw->conf;
2929         struct ieee80211_channel *channel = ch_switch->channel;
2930         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2931         /*
2932          * MULTI-FIXME
2933          * When we add support for multiple interfaces, we need to
2934          * revisit this. The channel switch command in the device
2935          * only affects the BSS context, but what does that really
2936          * mean? And what if we get a CSA on the second interface?
2937          * This needs a lot of work.
2938          */
2939         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2940         u16 ch;
2941
2942         IWL_DEBUG_MAC80211(priv, "enter\n");
2943
2944         mutex_lock(&priv->mutex);
2945
2946         if (iwl_is_rfkill(priv))
2947                 goto out;
2948
2949         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2950             test_bit(STATUS_SCANNING, &priv->status) ||
2951             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2952                 goto out;
2953
2954         if (!iwl_is_associated_ctx(ctx))
2955                 goto out;
2956
2957         if (!priv->cfg->ops->lib->set_channel_switch)
2958                 goto out;
2959
2960         ch = channel->hw_value;
2961         if (le16_to_cpu(ctx->active.channel) == ch)
2962                 goto out;
2963
2964         ch_info = iwl_get_channel_info(priv, channel->band, ch);
2965         if (!is_channel_valid(ch_info)) {
2966                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2967                 goto out;
2968         }
2969
2970         spin_lock_irq(&priv->lock);
2971
2972         priv->current_ht_config.smps = conf->smps_mode;
2973
2974         /* Configure HT40 channels */
2975         ctx->ht.enabled = conf_is_ht(conf);
2976         if (ctx->ht.enabled) {
2977                 if (conf_is_ht40_minus(conf)) {
2978                         ctx->ht.extension_chan_offset =
2979                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2980                         ctx->ht.is_40mhz = true;
2981                 } else if (conf_is_ht40_plus(conf)) {
2982                         ctx->ht.extension_chan_offset =
2983                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2984                         ctx->ht.is_40mhz = true;
2985                 } else {
2986                         ctx->ht.extension_chan_offset =
2987                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2988                         ctx->ht.is_40mhz = false;
2989                 }
2990         } else
2991                 ctx->ht.is_40mhz = false;
2992
2993         if ((le16_to_cpu(ctx->staging.channel) != ch))
2994                 ctx->staging.flags = 0;
2995
2996         iwl_set_rxon_channel(priv, channel, ctx);
2997         iwl_set_rxon_ht(priv, ht_conf);
2998         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2999
3000         spin_unlock_irq(&priv->lock);
3001
3002         iwl_set_rate(priv);
3003         /*
3004          * at this point, staging_rxon has the
3005          * configuration for channel switch
3006          */
3007         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
3008         priv->switch_channel = cpu_to_le16(ch);
3009         if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
3010                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
3011                 priv->switch_channel = 0;
3012                 ieee80211_chswitch_done(ctx->vif, false);
3013         }
3014
3015 out:
3016         mutex_unlock(&priv->mutex);
3017         IWL_DEBUG_MAC80211(priv, "leave\n");
3018 }
3019
3020 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
3021                                     unsigned int changed_flags,
3022                                     unsigned int *total_flags,
3023                                     u64 multicast)
3024 {
3025         struct iwl_priv *priv = hw->priv;
3026         __le32 filter_or = 0, filter_nand = 0;
3027         struct iwl_rxon_context *ctx;
3028
3029 #define CHK(test, flag) do { \
3030         if (*total_flags & (test))              \
3031                 filter_or |= (flag);            \
3032         else                                    \
3033                 filter_nand |= (flag);          \
3034         } while (0)
3035
3036         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3037                         changed_flags, *total_flags);
3038
3039         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3040         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3041         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3042         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3043
3044 #undef CHK
3045
3046         mutex_lock(&priv->mutex);
3047
3048         for_each_context(priv, ctx) {
3049                 ctx->staging.filter_flags &= ~filter_nand;
3050                 ctx->staging.filter_flags |= filter_or;
3051
3052                 /*
3053                  * Not committing directly because hardware can perform a scan,
3054                  * but we'll eventually commit the filter flags change anyway.
3055                  */
3056         }
3057
3058         mutex_unlock(&priv->mutex);
3059
3060         /*
3061          * Receiving all multicast frames is always enabled by the
3062          * default flags setup in iwl_connection_init_rx_config()
3063          * since we currently do not support programming multicast
3064          * filters into the device.
3065          */
3066         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3067                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3068 }
3069
3070 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3071 {
3072         struct iwl_priv *priv = hw->priv;
3073
3074         mutex_lock(&priv->mutex);
3075         IWL_DEBUG_MAC80211(priv, "enter\n");
3076
3077         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3078                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3079                 goto done;
3080         }
3081         if (iwl_is_rfkill(priv)) {
3082                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3083                 goto done;
3084         }
3085
3086         /*
3087          * mac80211 will not push any more frames for transmit
3088          * until the flush is completed
3089          */
3090         if (drop) {
3091                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3092                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3093                         IWL_ERR(priv, "flush request fail\n");
3094                         goto done;
3095                 }
3096         }
3097         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3098         iwlagn_wait_tx_queue_empty(priv);
3099 done:
3100         mutex_unlock(&priv->mutex);
3101         IWL_DEBUG_MAC80211(priv, "leave\n");
3102 }
3103
3104 static void iwlagn_disable_roc(struct iwl_priv *priv)
3105 {
3106         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3107         struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3108
3109         lockdep_assert_held(&priv->mutex);
3110
3111         if (!ctx->is_active)
3112                 return;
3113
3114         ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3115         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3116         iwl_set_rxon_channel(priv, chan, ctx);
3117         iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3118
3119         priv->_agn.hw_roc_channel = NULL;
3120
3121         iwlagn_commit_rxon(priv, ctx);
3122
3123         ctx->is_active = false;
3124 }
3125
3126 static void iwlagn_bg_roc_done(struct work_struct *work)
3127 {
3128         struct iwl_priv *priv = container_of(work, struct iwl_priv,
3129                                              _agn.hw_roc_work.work);
3130
3131         mutex_lock(&priv->mutex);
3132         ieee80211_remain_on_channel_expired(priv->hw);
3133         iwlagn_disable_roc(priv);
3134         mutex_unlock(&priv->mutex);
3135 }
3136
3137 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3138                                      struct ieee80211_channel *channel,
3139                                      enum nl80211_channel_type channel_type,
3140                                      int duration)
3141 {
3142         struct iwl_priv *priv = hw->priv;
3143         int err = 0;
3144
3145         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3146                 return -EOPNOTSUPP;
3147
3148         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3149                                         BIT(NL80211_IFTYPE_P2P_CLIENT)))
3150                 return -EOPNOTSUPP;
3151
3152         mutex_lock(&priv->mutex);
3153
3154         if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3155             test_bit(STATUS_SCAN_HW, &priv->status)) {
3156                 err = -EBUSY;
3157                 goto out;
3158         }
3159
3160         priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3161         priv->_agn.hw_roc_channel = channel;
3162         priv->_agn.hw_roc_chantype = channel_type;
3163         priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3164         iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3165         queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
3166                            msecs_to_jiffies(duration + 20));
3167
3168         msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3169         ieee80211_ready_on_channel(priv->hw);
3170
3171  out:
3172         mutex_unlock(&priv->mutex);
3173
3174         return err;
3175 }
3176
3177 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3178 {
3179         struct iwl_priv *priv = hw->priv;
3180
3181         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3182                 return -EOPNOTSUPP;
3183
3184         cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
3185
3186         mutex_lock(&priv->mutex);
3187         iwlagn_disable_roc(priv);
3188         mutex_unlock(&priv->mutex);
3189
3190         return 0;
3191 }
3192
3193 /*****************************************************************************
3194  *
3195  * driver setup and teardown
3196  *
3197  *****************************************************************************/
3198
3199 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3200 {
3201         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3202
3203         init_waitqueue_head(&priv->wait_command_queue);
3204
3205         INIT_WORK(&priv->restart, iwl_bg_restart);
3206         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3207         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3208         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3209         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3210         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3211         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3212         INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
3213
3214         iwl_setup_scan_deferred_work(priv);
3215
3216         if (priv->cfg->ops->lib->setup_deferred_work)
3217                 priv->cfg->ops->lib->setup_deferred_work(priv);
3218
3219         init_timer(&priv->statistics_periodic);
3220         priv->statistics_periodic.data = (unsigned long)priv;
3221         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3222
3223         init_timer(&priv->ucode_trace);
3224         priv->ucode_trace.data = (unsigned long)priv;
3225         priv->ucode_trace.function = iwl_bg_ucode_trace;
3226
3227         init_timer(&priv->watchdog);
3228         priv->watchdog.data = (unsigned long)priv;
3229         priv->watchdog.function = iwl_bg_watchdog;
3230
3231         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3232                 iwl_irq_tasklet, (unsigned long)priv);
3233 }
3234
3235 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3236 {
3237         if (priv->cfg->ops->lib->cancel_deferred_work)
3238                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3239
3240         cancel_work_sync(&priv->run_time_calib_work);
3241         cancel_work_sync(&priv->beacon_update);
3242
3243         iwl_cancel_scan_deferred_work(priv);
3244
3245         cancel_work_sync(&priv->bt_full_concurrency);
3246         cancel_work_sync(&priv->bt_runtime_config);
3247
3248         del_timer_sync(&priv->statistics_periodic);
3249         del_timer_sync(&priv->ucode_trace);
3250 }
3251
3252 static void iwl_init_hw_rates(struct iwl_priv *priv,
3253                               struct ieee80211_rate *rates)
3254 {
3255         int i;
3256
3257         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3258                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3259                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3260                 rates[i].hw_value_short = i;
3261                 rates[i].flags = 0;
3262                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3263                         /*
3264                          * If CCK != 1M then set short preamble rate flag.
3265                          */
3266                         rates[i].flags |=
3267                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3268                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3269                 }
3270         }
3271 }
3272
3273 static int iwl_init_drv(struct iwl_priv *priv)
3274 {
3275         int ret;
3276
3277         spin_lock_init(&priv->sta_lock);
3278         spin_lock_init(&priv->hcmd_lock);
3279
3280         mutex_init(&priv->mutex);
3281
3282         priv->ieee_channels = NULL;
3283         priv->ieee_rates = NULL;
3284         priv->band = IEEE80211_BAND_2GHZ;
3285
3286         priv->iw_mode = NL80211_IFTYPE_STATION;
3287         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3288         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3289         priv->_agn.agg_tids_count = 0;
3290
3291         /* initialize force reset */
3292         priv->force_reset[IWL_RF_RESET].reset_duration =
3293                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3294         priv->force_reset[IWL_FW_RESET].reset_duration =
3295                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3296
3297         priv->rx_statistics_jiffies = jiffies;
3298
3299         /* Choose which receivers/antennas to use */
3300         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
3301
3302         iwl_init_scan_params(priv);
3303
3304         /* init bt coex */
3305         if (priv->cfg->bt_params &&
3306             priv->cfg->bt_params->advanced_bt_coexist) {
3307                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3308                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3309                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3310                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3311                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3312                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3313         }
3314
3315         ret = iwl_init_channel_map(priv);
3316         if (ret) {
3317                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3318                 goto err;
3319         }
3320
3321         ret = iwlcore_init_geos(priv);
3322         if (ret) {
3323                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3324                 goto err_free_channel_map;
3325         }
3326         iwl_init_hw_rates(priv, priv->ieee_rates);
3327
3328         return 0;
3329
3330 err_free_channel_map:
3331         iwl_free_channel_map(priv);
3332 err:
3333         return ret;
3334 }
3335
3336 static void iwl_uninit_drv(struct iwl_priv *priv)
3337 {
3338         iwl_calib_free_results(priv);
3339         iwlcore_free_geos(priv);
3340         iwl_free_channel_map(priv);
3341         kfree(priv->scan_cmd);
3342         kfree(priv->beacon_cmd);
3343 }
3344
3345 static void iwl_mac_rssi_callback(struct ieee80211_hw *hw,
3346                            enum ieee80211_rssi_event rssi_event)
3347 {
3348         struct iwl_priv *priv = hw->priv;
3349
3350         mutex_lock(&priv->mutex);
3351
3352         if (priv->cfg->bt_params &&
3353                         priv->cfg->bt_params->advanced_bt_coexist) {
3354                 if (rssi_event == RSSI_EVENT_LOW)
3355                         priv->bt_enable_pspoll = true;
3356                 else if (rssi_event == RSSI_EVENT_HIGH)
3357                         priv->bt_enable_pspoll = false;
3358
3359                 iwlagn_send_advance_bt_config(priv);
3360         } else {
3361                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
3362                                 "ignoring RSSI callback\n");
3363         }
3364
3365         mutex_unlock(&priv->mutex);
3366 }
3367
3368 struct ieee80211_ops iwlagn_hw_ops = {
3369         .tx = iwlagn_mac_tx,
3370         .start = iwlagn_mac_start,
3371         .stop = iwlagn_mac_stop,
3372         .add_interface = iwl_mac_add_interface,
3373         .remove_interface = iwl_mac_remove_interface,
3374         .change_interface = iwl_mac_change_interface,
3375         .config = iwlagn_mac_config,
3376         .configure_filter = iwlagn_configure_filter,
3377         .set_key = iwlagn_mac_set_key,
3378         .update_tkip_key = iwlagn_mac_update_tkip_key,
3379         .conf_tx = iwl_mac_conf_tx,
3380         .bss_info_changed = iwlagn_bss_info_changed,
3381         .ampdu_action = iwlagn_mac_ampdu_action,
3382         .hw_scan = iwl_mac_hw_scan,
3383         .sta_notify = iwlagn_mac_sta_notify,
3384         .sta_add = iwlagn_mac_sta_add,
3385         .sta_remove = iwl_mac_sta_remove,
3386         .channel_switch = iwlagn_mac_channel_switch,
3387         .flush = iwlagn_mac_flush,
3388         .tx_last_beacon = iwl_mac_tx_last_beacon,
3389         .remain_on_channel = iwl_mac_remain_on_channel,
3390         .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3391         .offchannel_tx = iwl_mac_offchannel_tx,
3392         .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3393         .rssi_callback = iwl_mac_rssi_callback,
3394         CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3395         CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3396 };
3397
3398 static u32 iwl_hw_detect(struct iwl_priv *priv)
3399 {
3400         return iwl_read32(priv, CSR_HW_REV);
3401 }
3402
3403 static int iwl_set_hw_params(struct iwl_priv *priv)
3404 {
3405         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3406         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3407         if (iwlagn_mod_params.amsdu_size_8K)
3408                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3409         else
3410                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3411
3412         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3413
3414         if (iwlagn_mod_params.disable_11n)
3415                 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3416
3417         /* Device-specific setup */
3418         return priv->cfg->ops->lib->set_hw_params(priv);
3419 }
3420
3421 static const u8 iwlagn_bss_ac_to_fifo[] = {
3422         IWL_TX_FIFO_VO,
3423         IWL_TX_FIFO_VI,
3424         IWL_TX_FIFO_BE,
3425         IWL_TX_FIFO_BK,
3426 };
3427
3428 static const u8 iwlagn_bss_ac_to_queue[] = {
3429         0, 1, 2, 3,
3430 };
3431
3432 static const u8 iwlagn_pan_ac_to_fifo[] = {
3433         IWL_TX_FIFO_VO_IPAN,
3434         IWL_TX_FIFO_VI_IPAN,
3435         IWL_TX_FIFO_BE_IPAN,
3436         IWL_TX_FIFO_BK_IPAN,
3437 };
3438
3439 static const u8 iwlagn_pan_ac_to_queue[] = {
3440         7, 6, 5, 4,
3441 };
3442
3443 /* This function both allocates and initializes hw and priv. */
3444 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3445 {
3446         struct iwl_priv *priv;
3447         /* mac80211 allocates memory for this device instance, including
3448          *   space for this driver's private structure */
3449         struct ieee80211_hw *hw;
3450
3451         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3452         if (hw == NULL) {
3453                 pr_err("%s: Can not allocate network device\n",
3454                        cfg->name);
3455                 goto out;
3456         }
3457
3458         priv = hw->priv;
3459         priv->hw = hw;
3460
3461 out:
3462         return hw;
3463 }
3464
3465 static void iwl_init_context(struct iwl_priv *priv)
3466 {
3467         int i;
3468
3469         /*
3470          * The default context is always valid,
3471          * more may be discovered when firmware
3472          * is loaded.
3473          */
3474         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3475
3476         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3477                 priv->contexts[i].ctxid = i;
3478
3479         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3480         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3481         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3482         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3483         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3484         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3485         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3486         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3487         priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3488         priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3489         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3490                 BIT(NL80211_IFTYPE_ADHOC);
3491         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3492                 BIT(NL80211_IFTYPE_STATION);
3493         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3494         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3495         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3496         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3497
3498         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3499         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3500                 REPLY_WIPAN_RXON_TIMING;
3501         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3502                 REPLY_WIPAN_RXON_ASSOC;
3503         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3504         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3505         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3506         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3507         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3508         priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3509         priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3510         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3511         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3512                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3513 #ifdef CONFIG_IWL_P2P
3514         priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3515                 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3516 #endif
3517         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3518         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3519         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3520
3521         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3522 }
3523
3524 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3525                 struct iwl_cfg *cfg)
3526 {
3527         int err = 0;
3528         struct iwl_priv *priv;
3529         struct ieee80211_hw *hw;
3530         u16 num_mac;
3531         u32 hw_rev;
3532
3533         /************************
3534          * 1. Allocating HW data
3535          ************************/
3536         hw = iwl_alloc_all(cfg);
3537         if (!hw) {
3538                 err = -ENOMEM;
3539                 goto out;
3540         }
3541
3542         priv = hw->priv;
3543
3544         priv->bus.priv = priv;
3545         priv->bus.bus_specific = bus_specific;
3546         priv->bus.ops = bus_ops;
3547         priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
3548         priv->bus.ops->set_drv_data(&priv->bus, priv);
3549         priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3550
3551         iwl_trans_register(&priv->trans);
3552
3553         /* At this point both hw and priv are allocated. */
3554
3555         SET_IEEE80211_DEV(hw, priv->bus.dev);
3556
3557         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3558         priv->cfg = cfg;
3559         priv->inta_mask = CSR_INI_SET_MASK;
3560
3561         /* is antenna coupling more than 35dB ? */
3562         priv->bt_ant_couple_ok =
3563                 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3564                 true : false;
3565
3566         /* enable/disable bt channel inhibition */
3567         priv->bt_ch_announce = iwlagn_bt_ch_announce;
3568         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3569                        (priv->bt_ch_announce) ? "On" : "Off");
3570
3571         if (iwl_alloc_traffic_mem(priv))
3572                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3573
3574
3575         /* these spin locks will be used in apm_ops.init and EEPROM access
3576          * we should init now
3577          */
3578         spin_lock_init(&priv->reg_lock);
3579         spin_lock_init(&priv->lock);
3580
3581         /*
3582          * stop and reset the on-board processor just in case it is in a
3583          * strange state ... like being left stranded by a primary kernel
3584          * and this is now the kdump kernel trying to start up
3585          */
3586         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3587
3588         /***********************
3589          * 3. Read REV register
3590          ***********************/
3591         hw_rev = iwl_hw_detect(priv);
3592         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3593                 priv->cfg->name, hw_rev);
3594
3595         if (iwl_prepare_card_hw(priv)) {
3596                 err = -EIO;
3597                 IWL_WARN(priv, "Failed, HW not ready\n");
3598                 goto out_free_traffic_mem;
3599         }
3600
3601         /*****************
3602          * 4. Read EEPROM
3603          *****************/
3604         /* Read the EEPROM */
3605         err = iwl_eeprom_init(priv, hw_rev);
3606         if (err) {
3607                 IWL_ERR(priv, "Unable to init EEPROM\n");
3608                 goto out_free_traffic_mem;
3609         }
3610         err = iwl_eeprom_check_version(priv);
3611         if (err)
3612                 goto out_free_eeprom;
3613
3614         err = iwl_eeprom_check_sku(priv);
3615         if (err)
3616                 goto out_free_eeprom;
3617
3618         /* extract MAC Address */
3619         iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3620         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3621         priv->hw->wiphy->addresses = priv->addresses;
3622         priv->hw->wiphy->n_addresses = 1;
3623         num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3624         if (num_mac > 1) {
3625                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3626                        ETH_ALEN);
3627                 priv->addresses[1].addr[5]++;
3628                 priv->hw->wiphy->n_addresses++;
3629         }
3630
3631         /* initialize all valid contexts */
3632         iwl_init_context(priv);
3633
3634         /************************
3635          * 5. Setup HW constants
3636          ************************/
3637         if (iwl_set_hw_params(priv)) {
3638                 err = -ENOENT;
3639                 IWL_ERR(priv, "failed to set hw parameters\n");
3640                 goto out_free_eeprom;
3641         }
3642
3643         /*******************
3644          * 6. Setup priv
3645          *******************/
3646
3647         err = iwl_init_drv(priv);
3648         if (err)
3649                 goto out_free_eeprom;
3650         /* At this point both hw and priv are initialized. */
3651
3652         /********************
3653          * 7. Setup services
3654          ********************/
3655         iwl_alloc_isr_ict(priv);
3656
3657         err = request_irq(priv->bus.irq, iwl_isr_ict, IRQF_SHARED,
3658                           DRV_NAME, priv);
3659         if (err) {
3660                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus.irq);
3661                 goto out_uninit_drv;
3662         }
3663
3664         iwl_setup_deferred_work(priv);
3665         iwl_setup_rx_handlers(priv);
3666         iwl_testmode_init(priv);
3667
3668         /*********************************************
3669          * 8. Enable interrupts
3670          *********************************************/
3671
3672         iwl_enable_rfkill_int(priv);
3673
3674         /* If platform's RF_KILL switch is NOT set to KILL */
3675         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3676                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3677         else
3678                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3679
3680         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3681                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3682
3683         iwl_power_initialize(priv);
3684         iwl_tt_initialize(priv);
3685
3686         init_completion(&priv->_agn.firmware_loading_complete);
3687
3688         err = iwl_request_firmware(priv, true);
3689         if (err)
3690                 goto out_destroy_workqueue;
3691
3692         return 0;
3693
3694  out_destroy_workqueue:
3695         destroy_workqueue(priv->workqueue);
3696         priv->workqueue = NULL;
3697         free_irq(priv->bus.irq, priv);
3698         iwl_free_isr_ict(priv);
3699  out_uninit_drv:
3700         iwl_uninit_drv(priv);
3701  out_free_eeprom:
3702         iwl_eeprom_free(priv);
3703  out_free_traffic_mem:
3704         iwl_free_traffic_mem(priv);
3705         ieee80211_free_hw(priv->hw);
3706  out:
3707         return err;
3708 }
3709
3710 void __devexit iwl_remove(struct iwl_priv * priv)
3711 {
3712         unsigned long flags;
3713
3714         wait_for_completion(&priv->_agn.firmware_loading_complete);
3715
3716         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3717
3718         iwl_dbgfs_unregister(priv);
3719         sysfs_remove_group(&priv->bus.dev->kobj,
3720                            &iwl_attribute_group);
3721
3722         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3723          * to be called and iwl_down since we are removing the device
3724          * we need to set STATUS_EXIT_PENDING bit.
3725          */
3726         set_bit(STATUS_EXIT_PENDING, &priv->status);
3727
3728         iwl_testmode_cleanup(priv);
3729         iwl_leds_exit(priv);
3730
3731         if (priv->mac80211_registered) {
3732                 ieee80211_unregister_hw(priv->hw);
3733                 priv->mac80211_registered = 0;
3734         }
3735
3736         /* Reset to low power before unloading driver. */
3737         iwl_apm_stop(priv);
3738
3739         iwl_tt_exit(priv);
3740
3741         /* make sure we flush any pending irq or
3742          * tasklet for the driver
3743          */
3744         spin_lock_irqsave(&priv->lock, flags);
3745         iwl_disable_interrupts(priv);
3746         spin_unlock_irqrestore(&priv->lock, flags);
3747
3748         iwl_synchronize_irq(priv);
3749
3750         iwl_dealloc_ucode(priv);
3751
3752         trans_rx_free(priv);
3753         trans_tx_free(priv);
3754
3755         iwl_eeprom_free(priv);
3756
3757
3758         /*netif_stop_queue(dev); */
3759         flush_workqueue(priv->workqueue);
3760
3761         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3762          * priv->workqueue... so we can't take down the workqueue
3763          * until now... */
3764         destroy_workqueue(priv->workqueue);
3765         priv->workqueue = NULL;
3766         iwl_free_traffic_mem(priv);
3767
3768         free_irq(priv->bus.irq, priv);
3769         priv->bus.ops->set_drv_data(&priv->bus, NULL);
3770
3771         iwl_uninit_drv(priv);
3772
3773         iwl_free_isr_ict(priv);
3774
3775         dev_kfree_skb(priv->beacon_skb);
3776
3777         ieee80211_free_hw(priv->hw);
3778 }
3779
3780
3781 /*****************************************************************************
3782  *
3783  * driver and module entry point
3784  *
3785  *****************************************************************************/
3786 static int __init iwl_init(void)
3787 {
3788
3789         int ret;
3790         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3791         pr_info(DRV_COPYRIGHT "\n");
3792
3793         ret = iwlagn_rate_control_register();
3794         if (ret) {
3795                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3796                 return ret;
3797         }
3798
3799         ret = iwl_pci_register_driver();
3800
3801         if (ret)
3802                 goto error_register;
3803         return ret;
3804
3805 error_register:
3806         iwlagn_rate_control_unregister();
3807         return ret;
3808 }
3809
3810 static void __exit iwl_exit(void)
3811 {
3812         iwl_pci_unregister_driver();
3813         iwlagn_rate_control_unregister();
3814 }
3815
3816 module_exit(iwl_exit);
3817 module_init(iwl_init);
3818
3819 #ifdef CONFIG_IWLWIFI_DEBUG
3820 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3821 MODULE_PARM_DESC(debug, "debug output mask");
3822 #endif
3823
3824 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3825 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3826 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3827 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3828 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3829 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3830 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3831                    int, S_IRUGO);
3832 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3833 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3834 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3835
3836 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3837                    S_IRUGO);
3838 MODULE_PARM_DESC(ucode_alternative,
3839                  "specify ucode alternative to use from ucode file");
3840
3841 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3842 MODULE_PARM_DESC(antenna_coupling,
3843                  "specify antenna coupling in dB (defualt: 0 dB)");
3844
3845 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3846 MODULE_PARM_DESC(bt_ch_inhibition,
3847                  "Disable BT channel inhibition (default: enable)");
3848
3849 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3850 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3851
3852 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3853 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3854
3855 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
3856 MODULE_PARM_DESC(wd_disable,
3857                 "Disable stuck queue watchdog timer (default: 0 [enabled])");
3858
3859 /*
3860  * set bt_coex_active to true, uCode will do kill/defer
3861  * every time the priority line is asserted (BT is sending signals on the
3862  * priority line in the PCIx).
3863  * set bt_coex_active to false, uCode will ignore the BT activity and
3864  * perform the normal operation
3865  *
3866  * User might experience transmit issue on some platform due to WiFi/BT
3867  * co-exist problem. The possible behaviors are:
3868  *   Able to scan and finding all the available AP
3869  *   Not able to associate with any AP
3870  * On those platforms, WiFi communication can be restored by set
3871  * "bt_coex_active" module parameter to "false"
3872  *
3873  * default: bt_coex_active = true (BT_COEX_ENABLE)
3874  */
3875 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3876                 bool, S_IRUGO);
3877 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3878
3879 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3880 MODULE_PARM_DESC(led_mode, "0=system default, "
3881                 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3882
3883 module_param_named(power_save, iwlagn_mod_params.power_save,
3884                 bool, S_IRUGO);
3885 MODULE_PARM_DESC(power_save,
3886                  "enable WiFi power management (default: disable)");
3887
3888 module_param_named(power_level, iwlagn_mod_params.power_level,
3889                 int, S_IRUGO);
3890 MODULE_PARM_DESC(power_level,
3891                  "default power save level (range from 1 - 5, default: 1)");
3892
3893 /*
3894  * For now, keep using power level 1 instead of automatically
3895  * adjusting ...
3896  */
3897 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3898                 bool, S_IRUGO);
3899 MODULE_PARM_DESC(no_sleep_autoadjust,
3900                  "don't automatically adjust sleep level "
3901                  "according to maximum network latency (default: true)");