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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 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 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/delay.h>
  34 #include <linux/sched.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/firmware.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/if_arp.h>
  40
  41 #include <net/mac80211.h>
  42
  43 #include <asm/div64.h>
  44
  45 #include "iwl-eeprom.h"
  46 #include "iwl-wifi.h"
  47 #include "iwl-dev.h"
  48 #include "iwl-core.h"
  49 #include "iwl-io.h"
  50 #include "iwl-agn-calib.h"
  51 #include "iwl-agn.h"
  52 #include "iwl-shared.h"
  53 #include "iwl-bus.h"
  54 #include "iwl-trans.h"
  55
  56 /******************************************************************************
  57  *
  58  * module boiler plate
  59  *
  60  ******************************************************************************/
  61
  62 /*
  63  * module name, copyright, version, etc.
  64  */
  65 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #define DRV_VERSION     IWLWIFI_VERSION VD
  74
  75
  76 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  77 MODULE_VERSION(DRV_VERSION);
  78 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  79 MODULE_LICENSE("GPL");
  80 MODULE_ALIAS("iwlagn");
  81
  82 void iwl_update_chain_flags(struct iwl_priv *priv)
  83 {
  84         struct iwl_rxon_context *ctx;
  85
  86         for_each_context(priv, ctx) {
  87                 iwlagn_set_rxon_chain(priv, ctx);
  88                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
  89                         iwlagn_commit_rxon(priv, ctx);
  90         }
  91 }
  92
  93 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
  94 static void iwl_set_beacon_tim(struct iwl_priv *priv,
  95                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
  96                                u8 *beacon, u32 frame_size)
  97 {
  98         u16 tim_idx;
  99         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 100
 101         /*
 102          * The index is relative to frame start but we start looking at the
 103          * variable-length part of the beacon.
 104          */
 105         tim_idx = mgmt->u.beacon.variable - beacon;
 106
 107         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 108         while ((tim_idx < (frame_size - 2)) &&
 109                         (beacon[tim_idx] != WLAN_EID_TIM))
 110                 tim_idx += beacon[tim_idx+1] + 2;
 111
 112         /* If TIM field was found, set variables */
 113         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 114                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 115                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 116         } else
 117                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 118 }
 119
 120 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 121 {
 122         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 123         struct iwl_host_cmd cmd = {
 124                 .id = REPLY_TX_BEACON,
 125                 .flags = CMD_SYNC,
 126         };
 127         struct ieee80211_tx_info *info;
 128         u32 frame_size;
 129         u32 rate_flags;
 130         u32 rate;
 131
 132         /*
 133          * We have to set up the TX command, the TX Beacon command, and the
 134          * beacon contents.
 135          */
 136
 137         lockdep_assert_held(&priv->shrd->mutex);
 138
 139         if (!priv->beacon_ctx) {
 140                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 141                 return 0;
 142         }
 143
 144         if (WARN_ON(!priv->beacon_skb))
 145                 return -EINVAL;
 146
 147         /* Allocate beacon command */
 148         if (!priv->beacon_cmd)
 149                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 150         tx_beacon_cmd = priv->beacon_cmd;
 151         if (!tx_beacon_cmd)
 152                 return -ENOMEM;
 153
 154         frame_size = priv->beacon_skb->len;
 155
 156         /* Set up TX command fields */
 157         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 158         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 159         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 160         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 161                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 162
 163         /* Set up TX beacon command fields */
 164         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 165                            frame_size);
 166
 167         /* Set up packet rate and flags */
 168         info = IEEE80211_SKB_CB(priv->beacon_skb);
 169
 170         /*
 171          * Let's set up the rate at least somewhat correctly;
 172          * it will currently not actually be used by the uCode,
 173          * it uses the broadcast station's rate instead.
 174          */
 175         if (info->control.rates[0].idx < 0 ||
 176             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 177                 rate = 0;
 178         else
 179                 rate = info->control.rates[0].idx;
 180
 181         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 182                                               hw_params(priv).valid_tx_ant);
 183         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 184
 185         /* In mac80211, rates for 5 GHz start at 0 */
 186         if (info->band == IEEE80211_BAND_5GHZ)
 187                 rate += IWL_FIRST_OFDM_RATE;
 188         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 189                 rate_flags |= RATE_MCS_CCK_MSK;
 190
 191         tx_beacon_cmd->tx.rate_n_flags =
 192                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 193
 194         /* Submit command */
 195         cmd.len[0] = sizeof(*tx_beacon_cmd);
 196         cmd.data[0] = tx_beacon_cmd;
 197         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 198         cmd.len[1] = frame_size;
 199         cmd.data[1] = priv->beacon_skb->data;
 200         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 201
 202         return iwl_trans_send_cmd(trans(priv), &cmd);
 203 }
 204
 205 static void iwl_bg_beacon_update(struct work_struct *work)
 206 {
 207         struct iwl_priv *priv =
 208                 container_of(work, struct iwl_priv, beacon_update);
 209         struct sk_buff *beacon;
 210
 211         mutex_lock(&priv->shrd->mutex);
 212         if (!priv->beacon_ctx) {
 213                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 214                 goto out;
 215         }
 216
 217         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 218                 /*
 219                  * The ucode will send beacon notifications even in
 220                  * IBSS mode, but we don't want to process them. But
 221                  * we need to defer the type check to here due to
 222                  * requiring locking around the beacon_ctx access.
 223                  */
 224                 goto out;
 225         }
 226
 227         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 228         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 229         if (!beacon) {
 230                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 231                 goto out;
 232         }
 233
 234         /* new beacon skb is allocated every time; dispose previous.*/
 235         dev_kfree_skb(priv->beacon_skb);
 236
 237         priv->beacon_skb = beacon;
 238
 239         iwlagn_send_beacon_cmd(priv);
 240  out:
 241         mutex_unlock(&priv->shrd->mutex);
 242 }
 243
 244 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 245 {
 246         struct iwl_priv *priv =
 247                 container_of(work, struct iwl_priv, bt_runtime_config);
 248
 249         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 250                 return;
 251
 252         /* dont send host command if rf-kill is on */
 253         if (!iwl_is_ready_rf(priv->shrd))
 254                 return;
 255         iwlagn_send_advance_bt_config(priv);
 256 }
 257
 258 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 259 {
 260         struct iwl_priv *priv =
 261                 container_of(work, struct iwl_priv, bt_full_concurrency);
 262         struct iwl_rxon_context *ctx;
 263
 264         mutex_lock(&priv->shrd->mutex);
 265
 266         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 267                 goto out;
 268
 269         /* dont send host command if rf-kill is on */
 270         if (!iwl_is_ready_rf(priv->shrd))
 271                 goto out;
 272
 273         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 274                        priv->bt_full_concurrent ?
 275                        "full concurrency" : "3-wire");
 276
 277         /*
 278          * LQ & RXON updated cmds must be sent before BT Config cmd
 279          * to avoid 3-wire collisions
 280          */
 281         for_each_context(priv, ctx) {
 282                 iwlagn_set_rxon_chain(priv, ctx);
 283                 iwlagn_commit_rxon(priv, ctx);
 284         }
 285
 286         iwlagn_send_advance_bt_config(priv);
 287 out:
 288         mutex_unlock(&priv->shrd->mutex);
 289 }
 290
 291 /**
 292  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 293  *
 294  * This callback is provided in order to send a statistics request.
 295  *
 296  * This timer function is continually reset to execute within
 297  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 298  * was received.  We need to ensure we receive the statistics in order
 299  * to update the temperature used for calibrating the TXPOWER.
 300  */
 301 static void iwl_bg_statistics_periodic(unsigned long data)
 302 {
 303         struct iwl_priv *priv = (struct iwl_priv *)data;
 304
 305         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 306                 return;
 307
 308         /* dont send host command if rf-kill is on */
 309         if (!iwl_is_ready_rf(priv->shrd))
 310                 return;
 311
 312         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 313 }
 314
 315
 316 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 317                                         u32 start_idx, u32 num_events,
 318                                         u32 capacity, u32 mode)
 319 {
 320         u32 i;
 321         u32 ptr;        /* SRAM byte address of log data */
 322         u32 ev, time, data; /* event log data */
 323         unsigned long reg_flags;
 324
 325         if (mode == 0)
 326                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 327         else
 328                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 329
 330         /* Make sure device is powered up for SRAM reads */
 331         spin_lock_irqsave(&trans(priv)->reg_lock, reg_flags);
 332         if (iwl_grab_nic_access(trans(priv))) {
 333                 spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
 334                 return;
 335         }
 336
 337         /* Set starting address; reads will auto-increment */
 338         iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, ptr);
 339         rmb();
 340
 341         /*
 342          * Refuse to read more than would have fit into the log from
 343          * the current start_idx. This used to happen due to the race
 344          * described below, but now WARN because the code below should
 345          * prevent it from happening here.
 346          */
 347         if (WARN_ON(num_events > capacity - start_idx))
 348                 num_events = capacity - start_idx;
 349
 350         /*
 351          * "time" is actually "data" for mode 0 (no timestamp).
 352          * place event id # at far right for easier visual parsing.
 353          */
 354         for (i = 0; i < num_events; i++) {
 355                 ev = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 356                 time = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 357                 if (mode == 0) {
 358                         trace_iwlwifi_dev_ucode_cont_event(priv, 0, time, ev);
 359                 } else {
 360                         data = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 361                         trace_iwlwifi_dev_ucode_cont_event(priv, time,
 362                                                            data, ev);
 363                 }
 364         }
 365         /* Allow device to power down */
 366         iwl_release_nic_access(trans(priv));
 367         spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
 368 }
 369
 370 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 371 {
 372         u32 capacity;   /* event log capacity in # entries */
 373         struct {
 374                 u32 capacity;
 375                 u32 mode;
 376                 u32 wrap_counter;
 377                 u32 write_counter;
 378         } __packed read;
 379         u32 base;       /* SRAM byte address of event log header */
 380         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 381         u32 num_wraps;  /* # times uCode wrapped to top of log */
 382         u32 next_entry; /* index of next entry to be written by uCode */
 383
 384         base = priv->shrd->device_pointers.log_event_table;
 385         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 386                 iwl_read_targ_mem_words(trans(priv), base, &read, sizeof(read));
 387
 388                 capacity = read.capacity;
 389                 mode = read.mode;
 390                 num_wraps = read.wrap_counter;
 391                 next_entry = read.write_counter;
 392         } else
 393                 return;
 394
 395         /*
 396          * Unfortunately, the uCode doesn't use temporary variables.
 397          * Therefore, it can happen that we read next_entry == capacity,
 398          * which really means next_entry == 0.
 399          */
 400         if (unlikely(next_entry == capacity))
 401                 next_entry = 0;
 402         /*
 403          * Additionally, the uCode increases the write pointer before
 404          * the wraps counter, so if the write pointer is smaller than
 405          * the old write pointer (wrap occurred) but we read that no
 406          * wrap occurred, we actually read between the next_entry and
 407          * num_wraps update (this does happen in practice!!) -- take
 408          * that into account by increasing num_wraps.
 409          */
 410         if (unlikely(next_entry < priv->event_log.next_entry &&
 411                      num_wraps == priv->event_log.num_wraps))
 412                 num_wraps++;
 413
 414         if (num_wraps == priv->event_log.num_wraps) {
 415                 iwl_print_cont_event_trace(
 416                         priv, base, priv->event_log.next_entry,
 417                         next_entry - priv->event_log.next_entry,
 418                         capacity, mode);
 419
 420                 priv->event_log.non_wraps_count++;
 421         } else {
 422                 if (num_wraps - priv->event_log.num_wraps > 1)
 423                         priv->event_log.wraps_more_count++;
 424                 else
 425                         priv->event_log.wraps_once_count++;
 426
 427                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 428                                 num_wraps - priv->event_log.num_wraps,
 429                                 next_entry, priv->event_log.next_entry);
 430
 431                 if (next_entry < priv->event_log.next_entry) {
 432                         iwl_print_cont_event_trace(
 433                                 priv, base, priv->event_log.next_entry,
 434                                 capacity - priv->event_log.next_entry,
 435                                 capacity, mode);
 436
 437                         iwl_print_cont_event_trace(
 438                                 priv, base, 0, next_entry, capacity, mode);
 439                 } else {
 440                         iwl_print_cont_event_trace(
 441                                 priv, base, next_entry,
 442                                 capacity - next_entry,
 443                                 capacity, mode);
 444
 445                         iwl_print_cont_event_trace(
 446                                 priv, base, 0, next_entry, capacity, mode);
 447                 }
 448         }
 449
 450         priv->event_log.num_wraps = num_wraps;
 451         priv->event_log.next_entry = next_entry;
 452 }
 453
 454 /**
 455  * iwl_bg_ucode_trace - Timer callback to log ucode event
 456  *
 457  * The timer is continually set to execute every
 458  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 459  * this function is to perform continuous uCode event logging operation
 460  * if enabled
 461  */
 462 static void iwl_bg_ucode_trace(unsigned long data)
 463 {
 464         struct iwl_priv *priv = (struct iwl_priv *)data;
 465
 466         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 467                 return;
 468
 469         if (priv->event_log.ucode_trace) {
 470                 iwl_continuous_event_trace(priv);
 471                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 472                 mod_timer(&priv->ucode_trace,
 473                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 474         }
 475 }
 476
 477 static void iwl_bg_tx_flush(struct work_struct *work)
 478 {
 479         struct iwl_priv *priv =
 480                 container_of(work, struct iwl_priv, tx_flush);
 481
 482         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 483                 return;
 484
 485         /* do nothing if rf-kill is on */
 486         if (!iwl_is_ready_rf(priv->shrd))
 487                 return;
 488
 489         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 490         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 491 }
 492
 493 static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 494 {
 495         int i;
 496
 497         /*
 498          * The default context is always valid,
 499          * the PAN context depends on uCode.
 500          */
 501         priv->shrd->valid_contexts = BIT(IWL_RXON_CTX_BSS);
 502         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
 503                 priv->shrd->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
 504
 505         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
 506                 priv->contexts[i].ctxid = i;
 507
 508         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
 509         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
 510         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
 511         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
 512         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
 513         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
 514         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
 515         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 516         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
 517                 BIT(NL80211_IFTYPE_ADHOC);
 518         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 519                 BIT(NL80211_IFTYPE_STATION);
 520         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
 521         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
 522         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
 523         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
 524
 525         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
 526         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
 527                 REPLY_WIPAN_RXON_TIMING;
 528         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
 529                 REPLY_WIPAN_RXON_ASSOC;
 530         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
 531         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
 532         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
 533         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
 534         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
 535         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
 536                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
 537
 538         if (ucode_flags & IWL_UCODE_TLV_FLAGS_P2P)
 539                 priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
 540                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 541                         BIT(NL80211_IFTYPE_P2P_GO);
 542
 543         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
 544         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
 545         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
 546
 547         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 548 }
 549
 550 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
 551
 552 #define UCODE_EXPERIMENTAL_INDEX        100
 553 #define UCODE_EXPERIMENTAL_TAG          "exp"
 554
 555 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
 556 {
 557         const char *name_pre = cfg(priv)->fw_name_pre;
 558         char tag[8];
 559
 560         if (first) {
 561 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
 562                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
 563                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
 564         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
 565 #endif
 566                 priv->fw_index = cfg(priv)->ucode_api_max;
 567                 sprintf(tag, "%d", priv->fw_index);
 568         } else {
 569                 priv->fw_index--;
 570                 sprintf(tag, "%d", priv->fw_index);
 571         }
 572
 573         if (priv->fw_index < cfg(priv)->ucode_api_min) {
 574                 IWL_ERR(priv, "no suitable firmware found!\n");
 575                 return -ENOENT;
 576         }
 577
 578         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
 579
 580         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
 581                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
 582                                 ? "EXPERIMENTAL " : "",
 583                        priv->firmware_name);
 584
 585         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
 586                                        trans(priv)->dev,
 587                                        GFP_KERNEL, priv, iwl_ucode_callback);
 588 }
 589
 590 struct iwlagn_firmware_pieces {
 591         const void *inst, *data, *init, *init_data, *wowlan_inst, *wowlan_data;
 592         size_t inst_size, data_size, init_size, init_data_size,
 593                wowlan_inst_size, wowlan_data_size;
 594
 595         u32 build;
 596
 597         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
 598         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
 599 };
 600
 601 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
 602                                        const struct firmware *ucode_raw,
 603                                        struct iwlagn_firmware_pieces *pieces)
 604 {
 605         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
 606         u32 api_ver, hdr_size;
 607         const u8 *src;
 608
 609         priv->ucode_ver = le32_to_cpu(ucode->ver);
 610         api_ver = IWL_UCODE_API(priv->ucode_ver);
 611
 612         switch (api_ver) {
 613         default:
 614                 hdr_size = 28;
 615                 if (ucode_raw->size < hdr_size) {
 616                         IWL_ERR(priv, "File size too small!\n");
 617                         return -EINVAL;
 618                 }
 619                 pieces->build = le32_to_cpu(ucode->u.v2.build);
 620                 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
 621                 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
 622                 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
 623                 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
 624                 src = ucode->u.v2.data;
 625                 break;
 626         case 0:
 627         case 1:
 628         case 2:
 629                 hdr_size = 24;
 630                 if (ucode_raw->size < hdr_size) {
 631                         IWL_ERR(priv, "File size too small!\n");
 632                         return -EINVAL;
 633                 }
 634                 pieces->build = 0;
 635                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
 636                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
 637                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
 638                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
 639                 src = ucode->u.v1.data;
 640                 break;
 641         }
 642
 643         /* Verify size of file vs. image size info in file's header */
 644         if (ucode_raw->size != hdr_size + pieces->inst_size +
 645                                 pieces->data_size + pieces->init_size +
 646                                 pieces->init_data_size) {
 647
 648                 IWL_ERR(priv,
 649                         "uCode file size %d does not match expected size\n",
 650                         (int)ucode_raw->size);
 651                 return -EINVAL;
 652         }
 653
 654         pieces->inst = src;
 655         src += pieces->inst_size;
 656         pieces->data = src;
 657         src += pieces->data_size;
 658         pieces->init = src;
 659         src += pieces->init_size;
 660         pieces->init_data = src;
 661         src += pieces->init_data_size;
 662
 663         return 0;
 664 }
 665
 666 static int iwlagn_load_firmware(struct iwl_priv *priv,
 667                                 const struct firmware *ucode_raw,
 668                                 struct iwlagn_firmware_pieces *pieces,
 669                                 struct iwlagn_ucode_capabilities *capa)
 670 {
 671         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
 672         struct iwl_ucode_tlv *tlv;
 673         size_t len = ucode_raw->size;
 674         const u8 *data;
 675         int wanted_alternative = iwlagn_mod_params.wanted_ucode_alternative;
 676         int tmp;
 677         u64 alternatives;
 678         u32 tlv_len;
 679         enum iwl_ucode_tlv_type tlv_type;
 680         const u8 *tlv_data;
 681
 682         if (len < sizeof(*ucode)) {
 683                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
 684                 return -EINVAL;
 685         }
 686
 687         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
 688                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
 689                         le32_to_cpu(ucode->magic));
 690                 return -EINVAL;
 691         }
 692
 693         /*
 694          * Check which alternatives are present, and "downgrade"
 695          * when the chosen alternative is not present, warning
 696          * the user when that happens. Some files may not have
 697          * any alternatives, so don't warn in that case.
 698          */
 699         alternatives = le64_to_cpu(ucode->alternatives);
 700         tmp = wanted_alternative;
 701         if (wanted_alternative > 63)
 702                 wanted_alternative = 63;
 703         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
 704                 wanted_alternative--;
 705         if (wanted_alternative && wanted_alternative != tmp)
 706                 IWL_WARN(priv,
 707                          "uCode alternative %d not available, choosing %d\n",
 708                          tmp, wanted_alternative);
 709
 710         priv->ucode_ver = le32_to_cpu(ucode->ver);
 711         pieces->build = le32_to_cpu(ucode->build);
 712         data = ucode->data;
 713
 714         len -= sizeof(*ucode);
 715
 716         while (len >= sizeof(*tlv)) {
 717                 u16 tlv_alt;
 718
 719                 len -= sizeof(*tlv);
 720                 tlv = (void *)data;
 721
 722                 tlv_len = le32_to_cpu(tlv->length);
 723                 tlv_type = le16_to_cpu(tlv->type);
 724                 tlv_alt = le16_to_cpu(tlv->alternative);
 725                 tlv_data = tlv->data;
 726
 727                 if (len < tlv_len) {
 728                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
 729                                 len, tlv_len);
 730                         return -EINVAL;
 731                 }
 732                 len -= ALIGN(tlv_len, 4);
 733                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
 734
 735                 /*
 736                  * Alternative 0 is always valid.
 737                  *
 738                  * Skip alternative TLVs that are not selected.
 739                  */
 740                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
 741                         continue;
 742
 743                 switch (tlv_type) {
 744                 case IWL_UCODE_TLV_INST:
 745                         pieces->inst = tlv_data;
 746                         pieces->inst_size = tlv_len;
 747                         break;
 748                 case IWL_UCODE_TLV_DATA:
 749                         pieces->data = tlv_data;
 750                         pieces->data_size = tlv_len;
 751                         break;
 752                 case IWL_UCODE_TLV_INIT:
 753                         pieces->init = tlv_data;
 754                         pieces->init_size = tlv_len;
 755                         break;
 756                 case IWL_UCODE_TLV_INIT_DATA:
 757                         pieces->init_data = tlv_data;
 758                         pieces->init_data_size = tlv_len;
 759                         break;
 760                 case IWL_UCODE_TLV_BOOT:
 761                         IWL_ERR(priv, "Found unexpected BOOT ucode\n");
 762                         break;
 763                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
 764                         if (tlv_len != sizeof(u32))
 765                                 goto invalid_tlv_len;
 766                         capa->max_probe_length =
 767                                         le32_to_cpup((__le32 *)tlv_data);
 768                         break;
 769                 case IWL_UCODE_TLV_PAN:
 770                         if (tlv_len)
 771                                 goto invalid_tlv_len;
 772                         capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
 773                         break;
 774                 case IWL_UCODE_TLV_FLAGS:
 775                         /* must be at least one u32 */
 776                         if (tlv_len < sizeof(u32))
 777                                 goto invalid_tlv_len;
 778                         /* and a proper number of u32s */
 779                         if (tlv_len % sizeof(u32))
 780                                 goto invalid_tlv_len;
 781                         /*
 782                          * This driver only reads the first u32 as
 783                          * right now no more features are defined,
 784                          * if that changes then either the driver
 785                          * will not work with the new firmware, or
 786                          * it'll not take advantage of new features.
 787                          */
 788                         capa->flags = le32_to_cpup((__le32 *)tlv_data);
 789                         break;
 790                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
 791                         if (tlv_len != sizeof(u32))
 792                                 goto invalid_tlv_len;
 793                         pieces->init_evtlog_ptr =
 794                                         le32_to_cpup((__le32 *)tlv_data);
 795                         break;
 796                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
 797                         if (tlv_len != sizeof(u32))
 798                                 goto invalid_tlv_len;
 799                         pieces->init_evtlog_size =
 800                                         le32_to_cpup((__le32 *)tlv_data);
 801                         break;
 802                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
 803                         if (tlv_len != sizeof(u32))
 804                                 goto invalid_tlv_len;
 805                         pieces->init_errlog_ptr =
 806                                         le32_to_cpup((__le32 *)tlv_data);
 807                         break;
 808                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
 809                         if (tlv_len != sizeof(u32))
 810                                 goto invalid_tlv_len;
 811                         pieces->inst_evtlog_ptr =
 812                                         le32_to_cpup((__le32 *)tlv_data);
 813                         break;
 814                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
 815                         if (tlv_len != sizeof(u32))
 816                                 goto invalid_tlv_len;
 817                         pieces->inst_evtlog_size =
 818                                         le32_to_cpup((__le32 *)tlv_data);
 819                         break;
 820                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
 821                         if (tlv_len != sizeof(u32))
 822                                 goto invalid_tlv_len;
 823                         pieces->inst_errlog_ptr =
 824                                         le32_to_cpup((__le32 *)tlv_data);
 825                         break;
 826                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
 827                         if (tlv_len)
 828                                 goto invalid_tlv_len;
 829                         priv->enhance_sensitivity_table = true;
 830                         break;
 831                 case IWL_UCODE_TLV_WOWLAN_INST:
 832                         pieces->wowlan_inst = tlv_data;
 833                         pieces->wowlan_inst_size = tlv_len;
 834                         break;
 835                 case IWL_UCODE_TLV_WOWLAN_DATA:
 836                         pieces->wowlan_data = tlv_data;
 837                         pieces->wowlan_data_size = tlv_len;
 838                         break;
 839                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
 840                         if (tlv_len != sizeof(u32))
 841                                 goto invalid_tlv_len;
 842                         capa->standard_phy_calibration_size =
 843                                         le32_to_cpup((__le32 *)tlv_data);
 844                         break;
 845                 default:
 846                         IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
 847                         break;
 848                 }
 849         }
 850
 851         if (len) {
 852                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
 853                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
 854                 return -EINVAL;
 855         }
 856
 857         return 0;
 858
 859  invalid_tlv_len:
 860         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
 861         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
 862
 863         return -EINVAL;
 864 }
 865
 866 /**
 867  * iwl_ucode_callback - callback when firmware was loaded
 868  *
 869  * If loaded successfully, copies the firmware into buffers
 870  * for the card to fetch (via DMA).
 871  */
 872 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
 873 {
 874         struct iwl_priv *priv = context;
 875         struct iwl_ucode_header *ucode;
 876         int err;
 877         struct iwlagn_firmware_pieces pieces;
 878         const unsigned int api_max = cfg(priv)->ucode_api_max;
 879         unsigned int api_ok = cfg(priv)->ucode_api_ok;
 880         const unsigned int api_min = cfg(priv)->ucode_api_min;
 881         u32 api_ver;
 882         char buildstr[25];
 883         u32 build;
 884         struct iwlagn_ucode_capabilities ucode_capa = {
 885                 .max_probe_length = 200,
 886                 .standard_phy_calibration_size =
 887                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
 888         };
 889
 890         if (!api_ok)
 891                 api_ok = api_max;
 892
 893         memset(&pieces, 0, sizeof(pieces));
 894
 895         if (!ucode_raw) {
 896                 if (priv->fw_index <= api_ok)
 897                         IWL_ERR(priv,
 898                                 "request for firmware file '%s' failed.\n",
 899                                 priv->firmware_name);
 900                 goto try_again;
 901         }
 902
 903         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
 904                        priv->firmware_name, ucode_raw->size);
 905
 906         /* Make sure that we got at least the API version number */
 907         if (ucode_raw->size < 4) {
 908                 IWL_ERR(priv, "File size way too small!\n");
 909                 goto try_again;
 910         }
 911
 912         /* Data from ucode file:  header followed by uCode images */
 913         ucode = (struct iwl_ucode_header *)ucode_raw->data;
 914
 915         if (ucode->ver)
 916                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
 917         else
 918                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
 919                                            &ucode_capa);
 920
 921         if (err)
 922                 goto try_again;
 923
 924         api_ver = IWL_UCODE_API(priv->ucode_ver);
 925         build = pieces.build;
 926
 927         /*
 928          * api_ver should match the api version forming part of the
 929          * firmware filename ... but we don't check for that and only rely
 930          * on the API version read from firmware header from here on forward
 931          */
 932         /* no api version check required for experimental uCode */
 933         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
 934                 if (api_ver < api_min || api_ver > api_max) {
 935                         IWL_ERR(priv,
 936                                 "Driver unable to support your firmware API. "
 937                                 "Driver supports v%u, firmware is v%u.\n",
 938                                 api_max, api_ver);
 939                         goto try_again;
 940                 }
 941
 942                 if (api_ver < api_ok) {
 943                         if (api_ok != api_max)
 944                                 IWL_ERR(priv, "Firmware has old API version, "
 945                                         "expected v%u through v%u, got v%u.\n",
 946                                         api_ok, api_max, api_ver);
 947                         else
 948                                 IWL_ERR(priv, "Firmware has old API version, "
 949                                         "expected v%u, got v%u.\n",
 950                                         api_max, api_ver);
 951                         IWL_ERR(priv, "New firmware can be obtained from "
 952                                       "http://www.intellinuxwireless.org/.\n");
 953                 }
 954         }
 955
 956         if (build)
 957                 sprintf(buildstr, " build %u%s", build,
 958                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
 959                                 ? " (EXP)" : "");
 960         else
 961                 buildstr[0] = '\0';
 962
 963         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
 964                  IWL_UCODE_MAJOR(priv->ucode_ver),
 965                  IWL_UCODE_MINOR(priv->ucode_ver),
 966                  IWL_UCODE_API(priv->ucode_ver),
 967                  IWL_UCODE_SERIAL(priv->ucode_ver),
 968                  buildstr);
 969
 970         snprintf(priv->hw->wiphy->fw_version,
 971                  sizeof(priv->hw->wiphy->fw_version),
 972                  "%u.%u.%u.%u%s",
 973                  IWL_UCODE_MAJOR(priv->ucode_ver),
 974                  IWL_UCODE_MINOR(priv->ucode_ver),
 975                  IWL_UCODE_API(priv->ucode_ver),
 976                  IWL_UCODE_SERIAL(priv->ucode_ver),
 977                  buildstr);
 978
 979         /*
 980          * For any of the failures below (before allocating pci memory)
 981          * we will try to load a version with a smaller API -- maybe the
 982          * user just got a corrupted version of the latest API.
 983          */
 984
 985         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
 986                        priv->ucode_ver);
 987         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
 988                        pieces.inst_size);
 989         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
 990                        pieces.data_size);
 991         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
 992                        pieces.init_size);
 993         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
 994                        pieces.init_data_size);
 995
 996         /* Verify that uCode images will fit in card's SRAM */
 997         if (pieces.inst_size > hw_params(priv).max_inst_size) {
 998                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
 999                         pieces.inst_size);
1000                 goto try_again;
1001         }
1002
1003         if (pieces.data_size > hw_params(priv).max_data_size) {
1004                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1005                         pieces.data_size);
1006                 goto try_again;
1007         }
1008
1009         if (pieces.init_size > hw_params(priv).max_inst_size) {
1010                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1011                         pieces.init_size);
1012                 goto try_again;
1013         }
1014
1015         if (pieces.init_data_size > hw_params(priv).max_data_size) {
1016                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1017                         pieces.init_data_size);
1018                 goto try_again;
1019         }
1020
1021         /* Allocate ucode buffers for card's bus-master loading ... */
1022
1023         /* Runtime instructions and 2 copies of data:
1024          * 1) unmodified from disk
1025          * 2) backup cache for save/restore during power-downs */
1026         if (iwl_alloc_fw_desc(trans(priv), &trans(priv)->ucode_rt.code,
1027                               pieces.inst, pieces.inst_size))
1028                 goto err_pci_alloc;
1029         if (iwl_alloc_fw_desc(trans(priv), &trans(priv)->ucode_rt.data,
1030                               pieces.data, pieces.data_size))
1031                 goto err_pci_alloc;
1032
1033         /* Initialization instructions and data */
1034         if (pieces.init_size && pieces.init_data_size) {
1035                 if (iwl_alloc_fw_desc(trans(priv),
1036                                       &trans(priv)->ucode_init.code,
1037                                       pieces.init, pieces.init_size))
1038                         goto err_pci_alloc;
1039                 if (iwl_alloc_fw_desc(trans(priv),
1040                                       &trans(priv)->ucode_init.data,
1041                                       pieces.init_data, pieces.init_data_size))
1042                         goto err_pci_alloc;
1043         }
1044
1045         /* WoWLAN instructions and data */
1046         if (pieces.wowlan_inst_size && pieces.wowlan_data_size) {
1047                 if (iwl_alloc_fw_desc(trans(priv),
1048                                       &trans(priv)->ucode_wowlan.code,
1049                                       pieces.wowlan_inst,
1050                                       pieces.wowlan_inst_size))
1051                         goto err_pci_alloc;
1052                 if (iwl_alloc_fw_desc(trans(priv),
1053                                       &trans(priv)->ucode_wowlan.data,
1054                                       pieces.wowlan_data,
1055                                       pieces.wowlan_data_size))
1056                         goto err_pci_alloc;
1057         }
1058
1059         /* Now that we can no longer fail, copy information */
1060
1061         /*
1062          * The (size - 16) / 12 formula is based on the information recorded
1063          * for each event, which is of mode 1 (including timestamp) for all
1064          * new microcodes that include this information.
1065          */
1066         priv->init_evtlog_ptr = pieces.init_evtlog_ptr;
1067         if (pieces.init_evtlog_size)
1068                 priv->init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1069         else
1070                 priv->init_evtlog_size =
1071                         cfg(priv)->base_params->max_event_log_size;
1072         priv->init_errlog_ptr = pieces.init_errlog_ptr;
1073         priv->inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1074         if (pieces.inst_evtlog_size)
1075                 priv->inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1076         else
1077                 priv->inst_evtlog_size =
1078                         cfg(priv)->base_params->max_event_log_size;
1079         priv->inst_errlog_ptr = pieces.inst_errlog_ptr;
1080 #ifndef CONFIG_IWLWIFI_P2P
1081         ucode_capa.flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1082 #endif
1083
1084         priv->new_scan_threshold_behaviour =
1085                 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1086
1087         if (!(cfg(priv)->sku & EEPROM_SKU_CAP_IPAN_ENABLE))
1088                 ucode_capa.flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1089
1090         /*
1091          * if not PAN, then don't support P2P -- might be a uCode
1092          * packaging bug or due to the eeprom check above
1093          */
1094         if (!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN))
1095                 ucode_capa.flags &= ~IWL_UCODE_TLV_FLAGS_P2P;
1096
1097         if (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN) {
1098                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1099                 priv->shrd->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1100         } else {
1101                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1102                 priv->shrd->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1103         }
1104         /*
1105          * figure out the offset of chain noise reset and gain commands
1106          * base on the size of standard phy calibration commands table size
1107          */
1108         if (ucode_capa.standard_phy_calibration_size >
1109             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1110                 ucode_capa.standard_phy_calibration_size =
1111                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1112
1113         priv->phy_calib_chain_noise_reset_cmd =
1114                 ucode_capa.standard_phy_calibration_size;
1115         priv->phy_calib_chain_noise_gain_cmd =
1116                 ucode_capa.standard_phy_calibration_size + 1;
1117
1118         /* initialize all valid contexts */
1119         iwl_init_context(priv, ucode_capa.flags);
1120
1121         /**************************************************
1122          * This is still part of probe() in a sense...
1123          *
1124          * 9. Setup and register with mac80211 and debugfs
1125          **************************************************/
1126         err = iwlagn_mac_setup_register(priv, &ucode_capa);
1127         if (err)
1128                 goto out_unbind;
1129
1130         err = iwl_dbgfs_register(priv, DRV_NAME);
1131         if (err)
1132                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1133
1134         /* We have our copies now, allow OS release its copies */
1135         release_firmware(ucode_raw);
1136         complete(&priv->firmware_loading_complete);
1137         return;
1138
1139  try_again:
1140         /* try next, if any */
1141         if (iwl_request_firmware(priv, false))
1142                 goto out_unbind;
1143         release_firmware(ucode_raw);
1144         return;
1145
1146  err_pci_alloc:
1147         IWL_ERR(priv, "failed to allocate pci memory\n");
1148         iwl_dealloc_ucode(trans(priv));
1149  out_unbind:
1150         complete(&priv->firmware_loading_complete);
1151         device_release_driver(trans(priv)->dev);
1152         release_firmware(ucode_raw);
1153 }
1154
1155 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1156 {
1157         struct iwl_ct_kill_config cmd;
1158         struct iwl_ct_kill_throttling_config adv_cmd;
1159         unsigned long flags;
1160         int ret = 0;
1161
1162         spin_lock_irqsave(&priv->shrd->lock, flags);
1163         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
1164                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1165         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1166         priv->thermal_throttle.ct_kill_toggle = false;
1167
1168         if (cfg(priv)->base_params->support_ct_kill_exit) {
1169                 adv_cmd.critical_temperature_enter =
1170                         cpu_to_le32(hw_params(priv).ct_kill_threshold);
1171                 adv_cmd.critical_temperature_exit =
1172                         cpu_to_le32(hw_params(priv).ct_kill_exit_threshold);
1173
1174                 ret = iwl_trans_send_cmd_pdu(trans(priv),
1175                                        REPLY_CT_KILL_CONFIG_CMD,
1176                                        CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
1177                 if (ret)
1178                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1179                 else
1180                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1181                                 "succeeded, critical temperature enter is %d,"
1182                                 "exit is %d\n",
1183                                 hw_params(priv).ct_kill_threshold,
1184                                 hw_params(priv).ct_kill_exit_threshold);
1185         } else {
1186                 cmd.critical_temperature_R =
1187                         cpu_to_le32(hw_params(priv).ct_kill_threshold);
1188
1189                 ret = iwl_trans_send_cmd_pdu(trans(priv),
1190                                        REPLY_CT_KILL_CONFIG_CMD,
1191                                        CMD_SYNC, sizeof(cmd), &cmd);
1192                 if (ret)
1193                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1194                 else
1195                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1196                                 "succeeded, "
1197                                 "critical temperature is %d\n",
1198                                 hw_params(priv).ct_kill_threshold);
1199         }
1200 }
1201
1202 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1203 {
1204         struct iwl_calib_cfg_cmd calib_cfg_cmd;
1205         struct iwl_host_cmd cmd = {
1206                 .id = CALIBRATION_CFG_CMD,
1207                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1208                 .data = { &calib_cfg_cmd, },
1209         };
1210
1211         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1212         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
1213         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1214
1215         return iwl_trans_send_cmd(trans(priv), &cmd);
1216 }
1217
1218
1219 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
1220 {
1221         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
1222           .valid = cpu_to_le32(valid_tx_ant),
1223         };
1224
1225         if (IWL_UCODE_API(priv->ucode_ver) > 1) {
1226                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
1227                 return iwl_trans_send_cmd_pdu(trans(priv),
1228                                         TX_ANT_CONFIGURATION_CMD,
1229                                         CMD_SYNC,
1230                                         sizeof(struct iwl_tx_ant_config_cmd),
1231                                         &tx_ant_cmd);
1232         } else {
1233                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
1234                 return -EOPNOTSUPP;
1235         }
1236 }
1237
1238 /**
1239  * iwl_alive_start - called after REPLY_ALIVE notification received
1240  *                   from protocol/runtime uCode (initialization uCode's
1241  *                   Alive gets handled by iwl_init_alive_start()).
1242  */
1243 int iwl_alive_start(struct iwl_priv *priv)
1244 {
1245         int ret = 0;
1246         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1247
1248         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1249
1250         /* After the ALIVE response, we can send host commands to the uCode */
1251         set_bit(STATUS_ALIVE, &priv->shrd->status);
1252
1253         /* Enable watchdog to monitor the driver tx queues */
1254         iwl_setup_watchdog(priv);
1255
1256         if (iwl_is_rfkill(priv->shrd))
1257                 return -ERFKILL;
1258
1259         if (priv->event_log.ucode_trace) {
1260                 /* start collecting data now */
1261                 mod_timer(&priv->ucode_trace, jiffies);
1262         }
1263
1264         /* download priority table before any calibration request */
1265         if (cfg(priv)->bt_params &&
1266             cfg(priv)->bt_params->advanced_bt_coexist) {
1267                 /* Configure Bluetooth device coexistence support */
1268                 if (cfg(priv)->bt_params->bt_sco_disable)
1269                         priv->bt_enable_pspoll = false;
1270                 else
1271                         priv->bt_enable_pspoll = true;
1272
1273                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1274                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1275                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1276                 iwlagn_send_advance_bt_config(priv);
1277                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
1278                 priv->cur_rssi_ctx = NULL;
1279
1280                 iwl_send_prio_tbl(trans(priv));
1281
1282                 /* FIXME: w/a to force change uCode BT state machine */
1283                 ret = iwl_send_bt_env(trans(priv), IWL_BT_COEX_ENV_OPEN,
1284                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
1285                 if (ret)
1286                         return ret;
1287                 ret = iwl_send_bt_env(trans(priv), IWL_BT_COEX_ENV_CLOSE,
1288                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
1289                 if (ret)
1290                         return ret;
1291         } else {
1292                 /*
1293                  * default is 2-wire BT coexexistence support
1294                  */
1295                 iwl_send_bt_config(priv);
1296         }
1297
1298         /*
1299          * Perform runtime calibrations, including DC calibration.
1300          */
1301         iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
1302
1303         ieee80211_wake_queues(priv->hw);
1304
1305         priv->active_rate = IWL_RATES_MASK;
1306
1307         /* Configure Tx antenna selection based on H/W config */
1308         iwlagn_send_tx_ant_config(priv, cfg(priv)->valid_tx_ant);
1309
1310         if (iwl_is_associated_ctx(ctx) && !priv->shrd->wowlan) {
1311                 struct iwl_rxon_cmd *active_rxon =
1312                                 (struct iwl_rxon_cmd *)&ctx->active;
1313                 /* apply any changes in staging */
1314                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1315                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1316         } else {
1317                 struct iwl_rxon_context *tmp;
1318                 /* Initialize our rx_config data */
1319                 for_each_context(priv, tmp)
1320                         iwl_connection_init_rx_config(priv, tmp);
1321
1322                 iwlagn_set_rxon_chain(priv, ctx);
1323         }
1324
1325         if (!priv->shrd->wowlan) {
1326                 /* WoWLAN ucode will not reply in the same way, skip it */
1327                 iwl_reset_run_time_calib(priv);
1328         }
1329
1330         set_bit(STATUS_READY, &priv->shrd->status);
1331
1332         /* Configure the adapter for unassociated operation */
1333         ret = iwlagn_commit_rxon(priv, ctx);
1334         if (ret)
1335                 return ret;
1336
1337         /* At this point, the NIC is initialized and operational */
1338         iwl_rf_kill_ct_config(priv);
1339
1340         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1341
1342         return iwl_power_update_mode(priv, true);
1343 }
1344
1345 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1346
1347 void __iwl_down(struct iwl_priv *priv)
1348 {
1349         int exit_pending;
1350
1351         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1352
1353         iwl_scan_cancel_timeout(priv, 200);
1354
1355         /*
1356          * If active, scanning won't cancel it, so say it expired.
1357          * No race since we hold the mutex here and a new one
1358          * can't come in at this time.
1359          */
1360         ieee80211_remain_on_channel_expired(priv->hw);
1361
1362         exit_pending =
1363                 test_and_set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
1364
1365         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
1366          * to prevent rearm timer */
1367         del_timer_sync(&priv->watchdog);
1368
1369         iwl_clear_ucode_stations(priv, NULL);
1370         iwl_dealloc_bcast_stations(priv);
1371         iwl_clear_driver_stations(priv);
1372
1373         /* reset BT coex data */
1374         priv->bt_status = 0;
1375         priv->cur_rssi_ctx = NULL;
1376         priv->bt_is_sco = 0;
1377         if (cfg(priv)->bt_params)
1378                 priv->bt_traffic_load =
1379                          cfg(priv)->bt_params->bt_init_traffic_load;
1380         else
1381                 priv->bt_traffic_load = 0;
1382         priv->bt_full_concurrent = false;
1383         priv->bt_ci_compliance = 0;
1384
1385         /* Wipe out the EXIT_PENDING status bit if we are not actually
1386          * exiting the module */
1387         if (!exit_pending)
1388                 clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
1389
1390         if (priv->mac80211_registered)
1391                 ieee80211_stop_queues(priv->hw);
1392
1393         iwl_trans_stop_device(trans(priv));
1394
1395         /* Clear out all status bits but a few that are stable across reset */
1396         priv->shrd->status &=
1397                         test_bit(STATUS_RF_KILL_HW, &priv->shrd->status) <<
1398                                 STATUS_RF_KILL_HW |
1399                         test_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status) <<
1400                                 STATUS_GEO_CONFIGURED |
1401                         test_bit(STATUS_FW_ERROR, &priv->shrd->status) <<
1402                                 STATUS_FW_ERROR |
1403                         test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) <<
1404                                 STATUS_EXIT_PENDING;
1405
1406         dev_kfree_skb(priv->beacon_skb);
1407         priv->beacon_skb = NULL;
1408 }
1409
1410 void iwl_down(struct iwl_priv *priv)
1411 {
1412         mutex_lock(&priv->shrd->mutex);
1413         __iwl_down(priv);
1414         mutex_unlock(&priv->shrd->mutex);
1415
1416         iwl_cancel_deferred_work(priv);
1417 }
1418
1419 /*****************************************************************************
1420  *
1421  * Workqueue callbacks
1422  *
1423  *****************************************************************************/
1424
1425 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1426 {
1427         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1428                         run_time_calib_work);
1429
1430         mutex_lock(&priv->shrd->mutex);
1431
1432         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
1433             test_bit(STATUS_SCANNING, &priv->shrd->status)) {
1434                 mutex_unlock(&priv->shrd->mutex);
1435                 return;
1436         }
1437
1438         if (priv->start_calib) {
1439                 iwl_chain_noise_calibration(priv);
1440                 iwl_sensitivity_calibration(priv);
1441         }
1442
1443         mutex_unlock(&priv->shrd->mutex);
1444 }
1445
1446 void iwlagn_prepare_restart(struct iwl_priv *priv)
1447 {
1448         struct iwl_rxon_context *ctx;
1449         bool bt_full_concurrent;
1450         u8 bt_ci_compliance;
1451         u8 bt_load;
1452         u8 bt_status;
1453         bool bt_is_sco;
1454
1455         lockdep_assert_held(&priv->shrd->mutex);
1456
1457         for_each_context(priv, ctx)
1458                 ctx->vif = NULL;
1459         priv->is_open = 0;
1460
1461         /*
1462          * __iwl_down() will clear the BT status variables,
1463          * which is correct, but when we restart we really
1464          * want to keep them so restore them afterwards.
1465          *
1466          * The restart process will later pick them up and
1467          * re-configure the hw when we reconfigure the BT
1468          * command.
1469          */
1470         bt_full_concurrent = priv->bt_full_concurrent;
1471         bt_ci_compliance = priv->bt_ci_compliance;
1472         bt_load = priv->bt_traffic_load;
1473         bt_status = priv->bt_status;
1474         bt_is_sco = priv->bt_is_sco;
1475
1476         __iwl_down(priv);
1477
1478         priv->bt_full_concurrent = bt_full_concurrent;
1479         priv->bt_ci_compliance = bt_ci_compliance;
1480         priv->bt_traffic_load = bt_load;
1481         priv->bt_status = bt_status;
1482         priv->bt_is_sco = bt_is_sco;
1483 }
1484
1485 static void iwl_bg_restart(struct work_struct *data)
1486 {
1487         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1488
1489         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1490                 return;
1491
1492         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->shrd->status)) {
1493                 mutex_lock(&priv->shrd->mutex);
1494                 iwlagn_prepare_restart(priv);
1495                 mutex_unlock(&priv->shrd->mutex);
1496                 iwl_cancel_deferred_work(priv);
1497                 ieee80211_restart_hw(priv->hw);
1498         } else {
1499                 WARN_ON(1);
1500         }
1501 }
1502
1503
1504
1505
1506 void iwlagn_disable_roc(struct iwl_priv *priv)
1507 {
1508         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1509
1510         lockdep_assert_held(&priv->shrd->mutex);
1511
1512         if (!priv->hw_roc_setup)
1513                 return;
1514
1515         ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1516         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1517
1518         priv->hw_roc_channel = NULL;
1519
1520         memset(ctx->staging.node_addr, 0, ETH_ALEN);
1521
1522         iwlagn_commit_rxon(priv, ctx);
1523
1524         ctx->is_active = false;
1525         priv->hw_roc_setup = false;
1526 }
1527
1528 static void iwlagn_disable_roc_work(struct work_struct *work)
1529 {
1530         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1531                                              hw_roc_disable_work.work);
1532
1533         mutex_lock(&priv->shrd->mutex);
1534         iwlagn_disable_roc(priv);
1535         mutex_unlock(&priv->shrd->mutex);
1536 }
1537
1538 /*****************************************************************************
1539  *
1540  * driver setup and teardown
1541  *
1542  *****************************************************************************/
1543
1544 static void iwl_setup_deferred_work(struct iwl_priv *priv)
1545 {
1546         priv->shrd->workqueue = create_singlethread_workqueue(DRV_NAME);
1547
1548         init_waitqueue_head(&priv->shrd->wait_command_queue);
1549
1550         INIT_WORK(&priv->restart, iwl_bg_restart);
1551         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
1552         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
1553         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
1554         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
1555         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
1556         INIT_DELAYED_WORK(&priv->hw_roc_disable_work,
1557                           iwlagn_disable_roc_work);
1558
1559         iwl_setup_scan_deferred_work(priv);
1560
1561         if (cfg(priv)->lib->bt_setup_deferred_work)
1562                 cfg(priv)->lib->bt_setup_deferred_work(priv);
1563
1564         init_timer(&priv->statistics_periodic);
1565         priv->statistics_periodic.data = (unsigned long)priv;
1566         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
1567
1568         init_timer(&priv->ucode_trace);
1569         priv->ucode_trace.data = (unsigned long)priv;
1570         priv->ucode_trace.function = iwl_bg_ucode_trace;
1571
1572         init_timer(&priv->watchdog);
1573         priv->watchdog.data = (unsigned long)priv;
1574         priv->watchdog.function = iwl_bg_watchdog;
1575 }
1576
1577 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
1578 {
1579         if (cfg(priv)->lib->cancel_deferred_work)
1580                 cfg(priv)->lib->cancel_deferred_work(priv);
1581
1582         cancel_work_sync(&priv->run_time_calib_work);
1583         cancel_work_sync(&priv->beacon_update);
1584
1585         iwl_cancel_scan_deferred_work(priv);
1586
1587         cancel_work_sync(&priv->bt_full_concurrency);
1588         cancel_work_sync(&priv->bt_runtime_config);
1589         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1590
1591         del_timer_sync(&priv->statistics_periodic);
1592         del_timer_sync(&priv->ucode_trace);
1593 }
1594
1595 static void iwl_init_hw_rates(struct iwl_priv *priv,
1596                               struct ieee80211_rate *rates)
1597 {
1598         int i;
1599
1600         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1601                 rates[i].bitrate = iwl_rates[i].ieee * 5;
1602                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1603                 rates[i].hw_value_short = i;
1604                 rates[i].flags = 0;
1605                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
1606                         /*
1607                          * If CCK != 1M then set short preamble rate flag.
1608                          */
1609                         rates[i].flags |=
1610                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
1611                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
1612                 }
1613         }
1614 }
1615
1616 static int iwl_init_drv(struct iwl_priv *priv)
1617 {
1618         int ret;
1619
1620         spin_lock_init(&priv->shrd->sta_lock);
1621
1622         mutex_init(&priv->shrd->mutex);
1623
1624         INIT_LIST_HEAD(&trans(priv)->calib_results);
1625
1626         priv->ieee_channels = NULL;
1627         priv->ieee_rates = NULL;
1628         priv->band = IEEE80211_BAND_2GHZ;
1629
1630         priv->iw_mode = NL80211_IFTYPE_STATION;
1631         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1632         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1633         priv->agg_tids_count = 0;
1634
1635         /* initialize force reset */
1636         priv->force_reset[IWL_RF_RESET].reset_duration =
1637                 IWL_DELAY_NEXT_FORCE_RF_RESET;
1638         priv->force_reset[IWL_FW_RESET].reset_duration =
1639                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
1640
1641         priv->rx_statistics_jiffies = jiffies;
1642
1643         /* Choose which receivers/antennas to use */
1644         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1645
1646         iwl_init_scan_params(priv);
1647
1648         /* init bt coex */
1649         if (cfg(priv)->bt_params &&
1650             cfg(priv)->bt_params->advanced_bt_coexist) {
1651                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1652                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1653                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1654                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1655                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
1656                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1657         }
1658
1659         ret = iwl_init_channel_map(priv);
1660         if (ret) {
1661                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1662                 goto err;
1663         }
1664
1665         ret = iwl_init_geos(priv);
1666         if (ret) {
1667                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1668                 goto err_free_channel_map;
1669         }
1670         iwl_init_hw_rates(priv, priv->ieee_rates);
1671
1672         return 0;
1673
1674 err_free_channel_map:
1675         iwl_free_channel_map(priv);
1676 err:
1677         return ret;
1678 }
1679
1680 static void iwl_uninit_drv(struct iwl_priv *priv)
1681 {
1682         iwl_free_geos(priv);
1683         iwl_free_channel_map(priv);
1684         if (priv->tx_cmd_pool)
1685                 kmem_cache_destroy(priv->tx_cmd_pool);
1686         kfree(priv->scan_cmd);
1687         kfree(priv->beacon_cmd);
1688         kfree(rcu_dereference_raw(priv->noa_data));
1689 #ifdef CONFIG_IWLWIFI_DEBUGFS
1690         kfree(priv->wowlan_sram);
1691 #endif
1692 }
1693
1694
1695
1696 static u32 iwl_hw_detect(struct iwl_priv *priv)
1697 {
1698         return iwl_read32(trans(priv), CSR_HW_REV);
1699 }
1700
1701 /* Size of one Rx buffer in host DRAM */
1702 #define IWL_RX_BUF_SIZE_4K (4 * 1024)
1703 #define IWL_RX_BUF_SIZE_8K (8 * 1024)
1704
1705 static int iwl_set_hw_params(struct iwl_priv *priv)
1706 {
1707         if (iwlagn_mod_params.amsdu_size_8K)
1708                 hw_params(priv).rx_page_order =
1709                         get_order(IWL_RX_BUF_SIZE_8K);
1710         else
1711                 hw_params(priv).rx_page_order =
1712                         get_order(IWL_RX_BUF_SIZE_4K);
1713
1714         if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
1715                 cfg(priv)->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
1716
1717         hw_params(priv).num_ampdu_queues =
1718                 cfg(priv)->base_params->num_of_ampdu_queues;
1719         hw_params(priv).shadow_reg_enable =
1720                 cfg(priv)->base_params->shadow_reg_enable;
1721         hw_params(priv).sku = cfg(priv)->sku;
1722         hw_params(priv).wd_timeout = cfg(priv)->base_params->wd_timeout;
1723
1724         /* Device-specific setup */
1725         return cfg(priv)->lib->set_hw_params(priv);
1726 }
1727
1728
1729
1730 static void iwl_debug_config(struct iwl_priv *priv)
1731 {
1732         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUG "
1733 #ifdef CONFIG_IWLWIFI_DEBUG
1734                 "enabled\n");
1735 #else
1736                 "disabled\n");
1737 #endif
1738         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUGFS "
1739 #ifdef CONFIG_IWLWIFI_DEBUGFS
1740                 "enabled\n");
1741 #else
1742                 "disabled\n");
1743 #endif
1744         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TRACING "
1745 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1746                 "enabled\n");
1747 #else
1748                 "disabled\n");
1749 #endif
1750
1751         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TESTMODE "
1752 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
1753                 "enabled\n");
1754 #else
1755                 "disabled\n");
1756 #endif
1757         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_P2P "
1758 #ifdef CONFIG_IWLWIFI_P2P
1759                 "enabled\n");
1760 #else
1761                 "disabled\n");
1762 #endif
1763 }
1764
1765 int iwl_probe(struct iwl_bus *bus, const struct iwl_trans_ops *trans_ops,
1766                 struct iwl_cfg *cfg)
1767 {
1768         int err = 0;
1769         struct iwl_priv *priv;
1770         struct ieee80211_hw *hw;
1771         u16 num_mac;
1772         u32 hw_rev;
1773
1774         /************************
1775          * 1. Allocating HW data
1776          ************************/
1777         hw = iwl_alloc_all();
1778         if (!hw) {
1779                 pr_err("%s: Cannot allocate network device\n", cfg->name);
1780                 err = -ENOMEM;
1781                 goto out;
1782         }
1783
1784         priv = hw->priv;
1785         priv->shrd = bus->shrd;
1786         priv->shrd->priv = priv;
1787
1788         /* At this point both hw and priv are allocated. */
1789
1790         SET_IEEE80211_DEV(hw, trans(priv)->dev);
1791
1792         /* what debugging capabilities we have */
1793         iwl_debug_config(priv);
1794
1795         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1796         cfg(priv) = cfg;
1797
1798         /* is antenna coupling more than 35dB ? */
1799         priv->bt_ant_couple_ok =
1800                 (iwlagn_mod_params.ant_coupling >
1801                         IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
1802                         true : false;
1803
1804         /* enable/disable bt channel inhibition */
1805         priv->bt_ch_announce = iwlagn_mod_params.bt_ch_announce;
1806         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1807                        (priv->bt_ch_announce) ? "On" : "Off");
1808
1809         if (iwl_alloc_traffic_mem(priv))
1810                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
1811
1812         /* these spin locks will be used in apm_ops.init and EEPROM access
1813          * we should init now
1814          */
1815         spin_lock_init(&trans(priv)->reg_lock);
1816         spin_lock_init(&priv->shrd->lock);
1817
1818         /*
1819          * stop and reset the on-board processor just in case it is in a
1820          * strange state ... like being left stranded by a primary kernel
1821          * and this is now the kdump kernel trying to start up
1822          */
1823         iwl_write32(trans(priv), CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1824
1825         /***********************
1826          * 3. Read REV register
1827          ***********************/
1828         hw_rev = iwl_hw_detect(priv);
1829         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1830                 cfg(priv)->name, hw_rev);
1831
1832         err = iwl_trans_start_hw(trans(priv));
1833         if (err)
1834                 goto out_free_traffic_mem;
1835
1836         /*****************
1837          * 4. Read EEPROM
1838          *****************/
1839         /* switch the NIC on before accessing the EEPROM */
1840         iwl_apm_init(priv);
1841         /* Read the EEPROM */
1842         err = iwl_eeprom_init(priv, hw_rev);
1843         /* Reset chip to save power until we load uCode during "up". */
1844         iwl_apm_stop(priv);
1845         if (err) {
1846                 IWL_ERR(priv, "Unable to init EEPROM\n");
1847                 goto out_free_traffic_mem;
1848         }
1849         err = iwl_eeprom_check_version(priv);
1850         if (err)
1851                 goto out_free_eeprom;
1852
1853         err = iwl_eeprom_check_sku(priv);
1854         if (err)
1855                 goto out_free_eeprom;
1856
1857         /* extract MAC Address */
1858         iwl_eeprom_get_mac(priv->shrd, priv->addresses[0].addr);
1859         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1860         priv->hw->wiphy->addresses = priv->addresses;
1861         priv->hw->wiphy->n_addresses = 1;
1862         num_mac = iwl_eeprom_query16(priv->shrd, EEPROM_NUM_MAC_ADDRESS);
1863         if (num_mac > 1) {
1864                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1865                        ETH_ALEN);
1866                 priv->addresses[1].addr[5]++;
1867                 priv->hw->wiphy->n_addresses++;
1868         }
1869
1870         /************************
1871          * 5. Setup HW constants
1872          ************************/
1873         if (iwl_set_hw_params(priv)) {
1874                 err = -ENOENT;
1875                 IWL_ERR(priv, "failed to set hw parameters\n");
1876                 goto out_free_eeprom;
1877         }
1878
1879         /*******************
1880          * 6. Setup priv
1881          *******************/
1882
1883         err = iwl_init_drv(priv);
1884         if (err)
1885                 goto out_free_eeprom;
1886         /* At this point both hw and priv are initialized. */
1887
1888         /********************
1889          * 7. Setup services
1890          ********************/
1891         iwl_setup_deferred_work(priv);
1892         iwl_setup_rx_handlers(priv);
1893         iwl_testmode_init(priv);
1894
1895         /*********************************************
1896          * 8. Enable interrupts
1897          *********************************************/
1898
1899         iwl_enable_rfkill_int(priv);
1900
1901         /* If platform's RF_KILL switch is NOT set to KILL */
1902         if (iwl_read32(trans(priv),
1903                         CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1904                 clear_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
1905         else
1906                 set_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
1907
1908         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
1909                 test_bit(STATUS_RF_KILL_HW, &priv->shrd->status));
1910
1911         iwl_power_initialize(priv);
1912         iwl_tt_initialize(priv);
1913
1914         init_completion(&priv->firmware_loading_complete);
1915
1916         err = iwl_request_firmware(priv, true);
1917         if (err)
1918                 goto out_destroy_workqueue;
1919
1920         return 0;
1921
1922 out_destroy_workqueue:
1923         destroy_workqueue(priv->shrd->workqueue);
1924         priv->shrd->workqueue = NULL;
1925         iwl_uninit_drv(priv);
1926 out_free_eeprom:
1927         iwl_eeprom_free(priv->shrd);
1928 out_free_traffic_mem:
1929         iwl_free_traffic_mem(priv);
1930         ieee80211_free_hw(priv->hw);
1931 out:
1932         return err;
1933 }
1934
1935 void __devexit iwl_remove(struct iwl_priv * priv)
1936 {
1937         wait_for_completion(&priv->firmware_loading_complete);
1938
1939         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1940
1941         iwl_dbgfs_unregister(priv);
1942
1943         /* ieee80211_unregister_hw call wil cause iwlagn_mac_stop to
1944          * to be called and iwl_down since we are removing the device
1945          * we need to set STATUS_EXIT_PENDING bit.
1946          */
1947         set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
1948
1949         iwl_testmode_cleanup(priv);
1950         iwlagn_mac_unregister(priv);
1951
1952         iwl_tt_exit(priv);
1953
1954         /*This will stop the queues, move the device to low power state */
1955         iwl_trans_stop_device(trans(priv));
1956
1957         iwl_dealloc_ucode(trans(priv));
1958
1959         iwl_eeprom_free(priv->shrd);
1960
1961         /*netif_stop_queue(dev); */
1962         flush_workqueue(priv->shrd->workqueue);
1963
1964         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1965          * priv->shrd->workqueue... so we can't take down the workqueue
1966          * until now... */
1967         destroy_workqueue(priv->shrd->workqueue);
1968         priv->shrd->workqueue = NULL;
1969         iwl_free_traffic_mem(priv);
1970
1971         iwl_uninit_drv(priv);
1972
1973         dev_kfree_skb(priv->beacon_skb);
1974
1975         ieee80211_free_hw(priv->hw);
1976 }
1977
1978
1979 /*****************************************************************************
1980  *
1981  * driver and module entry point
1982  *
1983  *****************************************************************************/
1984 static int __init iwl_init(void)
1985 {
1986
1987         int ret;
1988         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
1989         pr_info(DRV_COPYRIGHT "\n");
1990
1991         ret = iwlagn_rate_control_register();
1992         if (ret) {
1993                 pr_err("Unable to register rate control algorithm: %d\n", ret);
1994                 return ret;
1995         }
1996
1997         ret = iwl_pci_register_driver();
1998
1999         if (ret)
2000                 goto error_register;
2001         return ret;
2002
2003 error_register:
2004         iwlagn_rate_control_unregister();
2005         return ret;
2006 }
2007
2008 static void __exit iwl_exit(void)
2009 {
2010         iwl_pci_unregister_driver();
2011         iwlagn_rate_control_unregister();
2012 }
2013
2014 module_exit(iwl_exit);
2015 module_init(iwl_init);
2016
2017 #ifdef CONFIG_IWLWIFI_DEBUG
2018 module_param_named(debug, iwlagn_mod_params.debug_level, uint,
2019                    S_IRUGO | S_IWUSR);
2020 MODULE_PARM_DESC(debug, "debug output mask");
2021 #endif
2022
2023 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
2024 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
2025 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
2026 MODULE_PARM_DESC(queues_num, "number of hw queues.");
2027 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, uint, S_IRUGO);
2028 MODULE_PARM_DESC(11n_disable,
2029         "disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX");
2030 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
2031                    int, S_IRUGO);
2032 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
2033 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
2034 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
2035
2036 module_param_named(ucode_alternative,
2037                    iwlagn_mod_params.wanted_ucode_alternative,
2038                    int, S_IRUGO);
2039 MODULE_PARM_DESC(ucode_alternative,
2040                  "specify ucode alternative to use from ucode file");
2041
2042 module_param_named(antenna_coupling, iwlagn_mod_params.ant_coupling,
2043                    int, S_IRUGO);
2044 MODULE_PARM_DESC(antenna_coupling,
2045                  "specify antenna coupling in dB (defualt: 0 dB)");
2046
2047 module_param_named(bt_ch_inhibition, iwlagn_mod_params.bt_ch_announce,
2048                    bool, S_IRUGO);
2049 MODULE_PARM_DESC(bt_ch_inhibition,
2050                  "Enable BT channel inhibition (default: enable)");
2051
2052 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
2053 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
2054
2055 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
2056 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
2057
2058 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, int, S_IRUGO);
2059 MODULE_PARM_DESC(wd_disable,
2060                 "Disable stuck queue watchdog timer 0=system default, "
2061                 "1=disable, 2=enable (default: 0)");
2062
2063 /*
2064  * set bt_coex_active to true, uCode will do kill/defer
2065  * every time the priority line is asserted (BT is sending signals on the
2066  * priority line in the PCIx).
2067  * set bt_coex_active to false, uCode will ignore the BT activity and
2068  * perform the normal operation
2069  *
2070  * User might experience transmit issue on some platform due to WiFi/BT
2071  * co-exist problem. The possible behaviors are:
2072  *   Able to scan and finding all the available AP
2073  *   Not able to associate with any AP
2074  * On those platforms, WiFi communication can be restored by set
2075  * "bt_coex_active" module parameter to "false"
2076  *
2077  * default: bt_coex_active = true (BT_COEX_ENABLE)
2078  */
2079 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
2080                 bool, S_IRUGO);
2081 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
2082
2083 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
2084 MODULE_PARM_DESC(led_mode, "0=system default, "
2085                 "1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0)");
2086
2087 module_param_named(power_save, iwlagn_mod_params.power_save,
2088                 bool, S_IRUGO);
2089 MODULE_PARM_DESC(power_save,
2090                  "enable WiFi power management (default: disable)");
2091
2092 module_param_named(power_level, iwlagn_mod_params.power_level,
2093                 int, S_IRUGO);
2094 MODULE_PARM_DESC(power_level,
2095                  "default power save level (range from 1 - 5, default: 1)");
2096
2097 module_param_named(auto_agg, iwlagn_mod_params.auto_agg,
2098                 bool, S_IRUGO);
2099 MODULE_PARM_DESC(auto_agg,
2100                  "enable agg w/o check traffic load (default: enable)");
2101
2102 /*
2103  * For now, keep using power level 1 instead of automatically
2104  * adjusting ...
2105  */
2106 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
2107                 bool, S_IRUGO);
2108 MODULE_PARM_DESC(no_sleep_autoadjust,
2109                  "don't automatically adjust sleep level "
2110                  "according to maximum network latency (default: true)");