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 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #include "iwl-eeprom.h"
  48 #include "iwl-dev.h"
  49 #include "iwl-core.h"
  50 #include "iwl-io.h"
  51 #include "iwl-helpers.h"
  52 #include "iwl-sta.h"
  53 #include "iwl-agn-calib.h"
  54 #include "iwl-agn.h"
  55 #include "iwl-bus.h"
  56 #include "iwl-trans.h"
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #define DRV_VERSION     IWLWIFI_VERSION VD
  76
  77
  78 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  79 MODULE_VERSION(DRV_VERSION);
  80 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  81 MODULE_LICENSE("GPL");
  82
  83 static int iwlagn_ant_coupling;
  84 static bool iwlagn_bt_ch_announce = 1;
  85
  86 void iwl_update_chain_flags(struct iwl_priv *priv)
  87 {
  88         struct iwl_rxon_context *ctx;
  89
  90         for_each_context(priv, ctx) {
  91                 iwlagn_set_rxon_chain(priv, ctx);
  92                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
  93                         iwlagn_commit_rxon(priv, ctx);
  94         }
  95 }
  96
  97 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
  98 static void iwl_set_beacon_tim(struct iwl_priv *priv,
  99                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 100                                u8 *beacon, u32 frame_size)
 101 {
 102         u16 tim_idx;
 103         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 104
 105         /*
 106          * The index is relative to frame start but we start looking at the
 107          * variable-length part of the beacon.
 108          */
 109         tim_idx = mgmt->u.beacon.variable - beacon;
 110
 111         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 112         while ((tim_idx < (frame_size - 2)) &&
 113                         (beacon[tim_idx] != WLAN_EID_TIM))
 114                 tim_idx += beacon[tim_idx+1] + 2;
 115
 116         /* If TIM field was found, set variables */
 117         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 118                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 119                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 120         } else
 121                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 122 }
 123
 124 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 125 {
 126         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 127         struct iwl_host_cmd cmd = {
 128                 .id = REPLY_TX_BEACON,
 129                 .flags = CMD_SYNC,
 130         };
 131         struct ieee80211_tx_info *info;
 132         u32 frame_size;
 133         u32 rate_flags;
 134         u32 rate;
 135
 136         /*
 137          * We have to set up the TX command, the TX Beacon command, and the
 138          * beacon contents.
 139          */
 140
 141         lockdep_assert_held(&priv->mutex);
 142
 143         if (!priv->beacon_ctx) {
 144                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 145                 return 0;
 146         }
 147
 148         if (WARN_ON(!priv->beacon_skb))
 149                 return -EINVAL;
 150
 151         /* Allocate beacon command */
 152         if (!priv->beacon_cmd)
 153                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 154         tx_beacon_cmd = priv->beacon_cmd;
 155         if (!tx_beacon_cmd)
 156                 return -ENOMEM;
 157
 158         frame_size = priv->beacon_skb->len;
 159
 160         /* Set up TX command fields */
 161         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 162         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 163         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 164         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 165                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 166
 167         /* Set up TX beacon command fields */
 168         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 169                            frame_size);
 170
 171         /* Set up packet rate and flags */
 172         info = IEEE80211_SKB_CB(priv->beacon_skb);
 173
 174         /*
 175          * Let's set up the rate at least somewhat correctly;
 176          * it will currently not actually be used by the uCode,
 177          * it uses the broadcast station's rate instead.
 178          */
 179         if (info->control.rates[0].idx < 0 ||
 180             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 181                 rate = 0;
 182         else
 183                 rate = info->control.rates[0].idx;
 184
 185         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 186                                               priv->hw_params.valid_tx_ant);
 187         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 188
 189         /* In mac80211, rates for 5 GHz start at 0 */
 190         if (info->band == IEEE80211_BAND_5GHZ)
 191                 rate += IWL_FIRST_OFDM_RATE;
 192         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 193                 rate_flags |= RATE_MCS_CCK_MSK;
 194
 195         tx_beacon_cmd->tx.rate_n_flags =
 196                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 197
 198         /* Submit command */
 199         cmd.len[0] = sizeof(*tx_beacon_cmd);
 200         cmd.data[0] = tx_beacon_cmd;
 201         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 202         cmd.len[1] = frame_size;
 203         cmd.data[1] = priv->beacon_skb->data;
 204         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 205
 206         return trans_send_cmd(&priv->trans, &cmd);
 207 }
 208
 209 static void iwl_bg_beacon_update(struct work_struct *work)
 210 {
 211         struct iwl_priv *priv =
 212                 container_of(work, struct iwl_priv, beacon_update);
 213         struct sk_buff *beacon;
 214
 215         mutex_lock(&priv->mutex);
 216         if (!priv->beacon_ctx) {
 217                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 218                 goto out;
 219         }
 220
 221         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 222                 /*
 223                  * The ucode will send beacon notifications even in
 224                  * IBSS mode, but we don't want to process them. But
 225                  * we need to defer the type check to here due to
 226                  * requiring locking around the beacon_ctx access.
 227                  */
 228                 goto out;
 229         }
 230
 231         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 232         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 233         if (!beacon) {
 234                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 235                 goto out;
 236         }
 237
 238         /* new beacon skb is allocated every time; dispose previous.*/
 239         dev_kfree_skb(priv->beacon_skb);
 240
 241         priv->beacon_skb = beacon;
 242
 243         iwlagn_send_beacon_cmd(priv);
 244  out:
 245         mutex_unlock(&priv->mutex);
 246 }
 247
 248 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 249 {
 250         struct iwl_priv *priv =
 251                 container_of(work, struct iwl_priv, bt_runtime_config);
 252
 253         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 254                 return;
 255
 256         /* dont send host command if rf-kill is on */
 257         if (!iwl_is_ready_rf(priv))
 258                 return;
 259         iwlagn_send_advance_bt_config(priv);
 260 }
 261
 262 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 263 {
 264         struct iwl_priv *priv =
 265                 container_of(work, struct iwl_priv, bt_full_concurrency);
 266         struct iwl_rxon_context *ctx;
 267
 268         mutex_lock(&priv->mutex);
 269
 270         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 271                 goto out;
 272
 273         /* dont send host command if rf-kill is on */
 274         if (!iwl_is_ready_rf(priv))
 275                 goto out;
 276
 277         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 278                        priv->bt_full_concurrent ?
 279                        "full concurrency" : "3-wire");
 280
 281         /*
 282          * LQ & RXON updated cmds must be sent before BT Config cmd
 283          * to avoid 3-wire collisions
 284          */
 285         for_each_context(priv, ctx) {
 286                 iwlagn_set_rxon_chain(priv, ctx);
 287                 iwlagn_commit_rxon(priv, ctx);
 288         }
 289
 290         iwlagn_send_advance_bt_config(priv);
 291 out:
 292         mutex_unlock(&priv->mutex);
 293 }
 294
 295 /**
 296  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 297  *
 298  * This callback is provided in order to send a statistics request.
 299  *
 300  * This timer function is continually reset to execute within
 301  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 302  * was received.  We need to ensure we receive the statistics in order
 303  * to update the temperature used for calibrating the TXPOWER.
 304  */
 305 static void iwl_bg_statistics_periodic(unsigned long data)
 306 {
 307         struct iwl_priv *priv = (struct iwl_priv *)data;
 308
 309         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 310                 return;
 311
 312         /* dont send host command if rf-kill is on */
 313         if (!iwl_is_ready_rf(priv))
 314                 return;
 315
 316         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 317 }
 318
 319
 320 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 321                                         u32 start_idx, u32 num_events,
 322                                         u32 mode)
 323 {
 324         u32 i;
 325         u32 ptr;        /* SRAM byte address of log data */
 326         u32 ev, time, data; /* event log data */
 327         unsigned long reg_flags;
 328
 329         if (mode == 0)
 330                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 331         else
 332                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 333
 334         /* Make sure device is powered up for SRAM reads */
 335         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 336         if (iwl_grab_nic_access(priv)) {
 337                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 338                 return;
 339         }
 340
 341         /* Set starting address; reads will auto-increment */
 342         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
 343         rmb();
 344
 345         /*
 346          * "time" is actually "data" for mode 0 (no timestamp).
 347          * place event id # at far right for easier visual parsing.
 348          */
 349         for (i = 0; i < num_events; i++) {
 350                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 351                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 352                 if (mode == 0) {
 353                         trace_iwlwifi_dev_ucode_cont_event(priv,
 354                                                         0, time, ev);
 355                 } else {
 356                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 357                         trace_iwlwifi_dev_ucode_cont_event(priv,
 358                                                 time, data, ev);
 359                 }
 360         }
 361         /* Allow device to power down */
 362         iwl_release_nic_access(priv);
 363         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 364 }
 365
 366 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 367 {
 368         u32 capacity;   /* event log capacity in # entries */
 369         u32 base;       /* SRAM byte address of event log header */
 370         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 371         u32 num_wraps;  /* # times uCode wrapped to top of log */
 372         u32 next_entry; /* index of next entry to be written by uCode */
 373
 374         base = priv->device_pointers.error_event_table;
 375         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 376                 capacity = iwl_read_targ_mem(priv, base);
 377                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
 378                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
 379                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
 380         } else
 381                 return;
 382
 383         if (num_wraps == priv->event_log.num_wraps) {
 384                 iwl_print_cont_event_trace(priv,
 385                                        base, priv->event_log.next_entry,
 386                                        next_entry - priv->event_log.next_entry,
 387                                        mode);
 388                 priv->event_log.non_wraps_count++;
 389         } else {
 390                 if ((num_wraps - priv->event_log.num_wraps) > 1)
 391                         priv->event_log.wraps_more_count++;
 392                 else
 393                         priv->event_log.wraps_once_count++;
 394                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 395                                 num_wraps - priv->event_log.num_wraps,
 396                                 next_entry, priv->event_log.next_entry);
 397                 if (next_entry < priv->event_log.next_entry) {
 398                         iwl_print_cont_event_trace(priv, base,
 399                                priv->event_log.next_entry,
 400                                capacity - priv->event_log.next_entry,
 401                                mode);
 402
 403                         iwl_print_cont_event_trace(priv, base, 0,
 404                                 next_entry, mode);
 405                 } else {
 406                         iwl_print_cont_event_trace(priv, base,
 407                                next_entry, capacity - next_entry,
 408                                mode);
 409
 410                         iwl_print_cont_event_trace(priv, base, 0,
 411                                 next_entry, mode);
 412                 }
 413         }
 414         priv->event_log.num_wraps = num_wraps;
 415         priv->event_log.next_entry = next_entry;
 416 }
 417
 418 /**
 419  * iwl_bg_ucode_trace - Timer callback to log ucode event
 420  *
 421  * The timer is continually set to execute every
 422  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 423  * this function is to perform continuous uCode event logging operation
 424  * if enabled
 425  */
 426 static void iwl_bg_ucode_trace(unsigned long data)
 427 {
 428         struct iwl_priv *priv = (struct iwl_priv *)data;
 429
 430         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 431                 return;
 432
 433         if (priv->event_log.ucode_trace) {
 434                 iwl_continuous_event_trace(priv);
 435                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 436                 mod_timer(&priv->ucode_trace,
 437                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 438         }
 439 }
 440
 441 static void iwl_bg_tx_flush(struct work_struct *work)
 442 {
 443         struct iwl_priv *priv =
 444                 container_of(work, struct iwl_priv, tx_flush);
 445
 446         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 447                 return;
 448
 449         /* do nothing if rf-kill is on */
 450         if (!iwl_is_ready_rf(priv))
 451                 return;
 452
 453         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 454         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 455 }
 456
 457 /*****************************************************************************
 458  *
 459  * sysfs attributes
 460  *
 461  *****************************************************************************/
 462
 463 #ifdef CONFIG_IWLWIFI_DEBUG
 464
 465 /*
 466  * The following adds a new attribute to the sysfs representation
 467  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
 468  * used for controlling the debug level.
 469  *
 470  * See the level definitions in iwl for details.
 471  *
 472  * The debug_level being managed using sysfs below is a per device debug
 473  * level that is used instead of the global debug level if it (the per
 474  * device debug level) is set.
 475  */
 476 static ssize_t show_debug_level(struct device *d,
 477                                 struct device_attribute *attr, char *buf)
 478 {
 479         struct iwl_priv *priv = dev_get_drvdata(d);
 480         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
 481 }
 482 static ssize_t store_debug_level(struct device *d,
 483                                 struct device_attribute *attr,
 484                                  const char *buf, size_t count)
 485 {
 486         struct iwl_priv *priv = dev_get_drvdata(d);
 487         unsigned long val;
 488         int ret;
 489
 490         ret = strict_strtoul(buf, 0, &val);
 491         if (ret)
 492                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
 493         else {
 494                 priv->debug_level = val;
 495                 if (iwl_alloc_traffic_mem(priv))
 496                         IWL_ERR(priv,
 497                                 "Not enough memory to generate traffic log\n");
 498         }
 499         return strnlen(buf, count);
 500 }
 501
 502 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
 503                         show_debug_level, store_debug_level);
 504
 505
 506 #endif /* CONFIG_IWLWIFI_DEBUG */
 507
 508
 509 static ssize_t show_temperature(struct device *d,
 510                                 struct device_attribute *attr, char *buf)
 511 {
 512         struct iwl_priv *priv = dev_get_drvdata(d);
 513
 514         if (!iwl_is_alive(priv))
 515                 return -EAGAIN;
 516
 517         return sprintf(buf, "%d\n", priv->temperature);
 518 }
 519
 520 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
 521
 522 static ssize_t show_tx_power(struct device *d,
 523                              struct device_attribute *attr, char *buf)
 524 {
 525         struct iwl_priv *priv = dev_get_drvdata(d);
 526
 527         if (!iwl_is_ready_rf(priv))
 528                 return sprintf(buf, "off\n");
 529         else
 530                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
 531 }
 532
 533 static ssize_t store_tx_power(struct device *d,
 534                               struct device_attribute *attr,
 535                               const char *buf, size_t count)
 536 {
 537         struct iwl_priv *priv = dev_get_drvdata(d);
 538         unsigned long val;
 539         int ret;
 540
 541         ret = strict_strtoul(buf, 10, &val);
 542         if (ret)
 543                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
 544         else {
 545                 ret = iwl_set_tx_power(priv, val, false);
 546                 if (ret)
 547                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
 548                                 ret);
 549                 else
 550                         ret = count;
 551         }
 552         return ret;
 553 }
 554
 555 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
 556
 557 static struct attribute *iwl_sysfs_entries[] = {
 558         &dev_attr_temperature.attr,
 559         &dev_attr_tx_power.attr,
 560 #ifdef CONFIG_IWLWIFI_DEBUG
 561         &dev_attr_debug_level.attr,
 562 #endif
 563         NULL
 564 };
 565
 566 static struct attribute_group iwl_attribute_group = {
 567         .name = NULL,           /* put in device directory */
 568         .attrs = iwl_sysfs_entries,
 569 };
 570
 571 /******************************************************************************
 572  *
 573  * uCode download functions
 574  *
 575  ******************************************************************************/
 576
 577 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
 578 {
 579         if (desc->v_addr)
 580                 dma_free_coherent(priv->bus->dev, desc->len,
 581                                   desc->v_addr, desc->p_addr);
 582         desc->v_addr = NULL;
 583         desc->len = 0;
 584 }
 585
 586 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
 587 {
 588         iwl_free_fw_desc(priv, &img->code);
 589         iwl_free_fw_desc(priv, &img->data);
 590 }
 591
 592 static void iwl_dealloc_ucode(struct iwl_priv *priv)
 593 {
 594         iwl_free_fw_img(priv, &priv->ucode_rt);
 595         iwl_free_fw_img(priv, &priv->ucode_init);
 596         iwl_free_fw_img(priv, &priv->ucode_wowlan);
 597 }
 598
 599 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
 600                              const void *data, size_t len)
 601 {
 602         if (!len) {
 603                 desc->v_addr = NULL;
 604                 return -EINVAL;
 605         }
 606
 607         desc->v_addr = dma_alloc_coherent(priv->bus->dev, len,
 608                                           &desc->p_addr, GFP_KERNEL);
 609         if (!desc->v_addr)
 610                 return -ENOMEM;
 611
 612         desc->len = len;
 613         memcpy(desc->v_addr, data, len);
 614         return 0;
 615 }
 616
 617 struct iwlagn_ucode_capabilities {
 618         u32 max_probe_length;
 619         u32 standard_phy_calibration_size;
 620         u32 flags;
 621 };
 622
 623 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
 624 static int iwl_mac_setup_register(struct iwl_priv *priv,
 625                                   struct iwlagn_ucode_capabilities *capa);
 626
 627 #define UCODE_EXPERIMENTAL_INDEX        100
 628 #define UCODE_EXPERIMENTAL_TAG          "exp"
 629
 630 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
 631 {
 632         const char *name_pre = priv->cfg->fw_name_pre;
 633         char tag[8];
 634
 635         if (first) {
 636 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
 637                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
 638                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
 639         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
 640 #endif
 641                 priv->fw_index = priv->cfg->ucode_api_max;
 642                 sprintf(tag, "%d", priv->fw_index);
 643         } else {
 644                 priv->fw_index--;
 645                 sprintf(tag, "%d", priv->fw_index);
 646         }
 647
 648         if (priv->fw_index < priv->cfg->ucode_api_min) {
 649                 IWL_ERR(priv, "no suitable firmware found!\n");
 650                 return -ENOENT;
 651         }
 652
 653         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
 654
 655         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
 656                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
 657                                 ? "EXPERIMENTAL " : "",
 658                        priv->firmware_name);
 659
 660         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
 661                                        priv->bus->dev,
 662                                        GFP_KERNEL, priv, iwl_ucode_callback);
 663 }
 664
 665 struct iwlagn_firmware_pieces {
 666         const void *inst, *data, *init, *init_data, *wowlan_inst, *wowlan_data;
 667         size_t inst_size, data_size, init_size, init_data_size,
 668                wowlan_inst_size, wowlan_data_size;
 669
 670         u32 build;
 671
 672         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
 673         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
 674 };
 675
 676 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
 677                                        const struct firmware *ucode_raw,
 678                                        struct iwlagn_firmware_pieces *pieces)
 679 {
 680         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
 681         u32 api_ver, hdr_size;
 682         const u8 *src;
 683
 684         priv->ucode_ver = le32_to_cpu(ucode->ver);
 685         api_ver = IWL_UCODE_API(priv->ucode_ver);
 686
 687         switch (api_ver) {
 688         default:
 689                 hdr_size = 28;
 690                 if (ucode_raw->size < hdr_size) {
 691                         IWL_ERR(priv, "File size too small!\n");
 692                         return -EINVAL;
 693                 }
 694                 pieces->build = le32_to_cpu(ucode->u.v2.build);
 695                 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
 696                 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
 697                 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
 698                 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
 699                 src = ucode->u.v2.data;
 700                 break;
 701         case 0:
 702         case 1:
 703         case 2:
 704                 hdr_size = 24;
 705                 if (ucode_raw->size < hdr_size) {
 706                         IWL_ERR(priv, "File size too small!\n");
 707                         return -EINVAL;
 708                 }
 709                 pieces->build = 0;
 710                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
 711                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
 712                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
 713                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
 714                 src = ucode->u.v1.data;
 715                 break;
 716         }
 717
 718         /* Verify size of file vs. image size info in file's header */
 719         if (ucode_raw->size != hdr_size + pieces->inst_size +
 720                                 pieces->data_size + pieces->init_size +
 721                                 pieces->init_data_size) {
 722
 723                 IWL_ERR(priv,
 724                         "uCode file size %d does not match expected size\n",
 725                         (int)ucode_raw->size);
 726                 return -EINVAL;
 727         }
 728
 729         pieces->inst = src;
 730         src += pieces->inst_size;
 731         pieces->data = src;
 732         src += pieces->data_size;
 733         pieces->init = src;
 734         src += pieces->init_size;
 735         pieces->init_data = src;
 736         src += pieces->init_data_size;
 737
 738         return 0;
 739 }
 740
 741 static int iwlagn_wanted_ucode_alternative = 1;
 742
 743 static int iwlagn_load_firmware(struct iwl_priv *priv,
 744                                 const struct firmware *ucode_raw,
 745                                 struct iwlagn_firmware_pieces *pieces,
 746                                 struct iwlagn_ucode_capabilities *capa)
 747 {
 748         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
 749         struct iwl_ucode_tlv *tlv;
 750         size_t len = ucode_raw->size;
 751         const u8 *data;
 752         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
 753         u64 alternatives;
 754         u32 tlv_len;
 755         enum iwl_ucode_tlv_type tlv_type;
 756         const u8 *tlv_data;
 757
 758         if (len < sizeof(*ucode)) {
 759                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
 760                 return -EINVAL;
 761         }
 762
 763         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
 764                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
 765                         le32_to_cpu(ucode->magic));
 766                 return -EINVAL;
 767         }
 768
 769         /*
 770          * Check which alternatives are present, and "downgrade"
 771          * when the chosen alternative is not present, warning
 772          * the user when that happens. Some files may not have
 773          * any alternatives, so don't warn in that case.
 774          */
 775         alternatives = le64_to_cpu(ucode->alternatives);
 776         tmp = wanted_alternative;
 777         if (wanted_alternative > 63)
 778                 wanted_alternative = 63;
 779         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
 780                 wanted_alternative--;
 781         if (wanted_alternative && wanted_alternative != tmp)
 782                 IWL_WARN(priv,
 783                          "uCode alternative %d not available, choosing %d\n",
 784                          tmp, wanted_alternative);
 785
 786         priv->ucode_ver = le32_to_cpu(ucode->ver);
 787         pieces->build = le32_to_cpu(ucode->build);
 788         data = ucode->data;
 789
 790         len -= sizeof(*ucode);
 791
 792         while (len >= sizeof(*tlv)) {
 793                 u16 tlv_alt;
 794
 795                 len -= sizeof(*tlv);
 796                 tlv = (void *)data;
 797
 798                 tlv_len = le32_to_cpu(tlv->length);
 799                 tlv_type = le16_to_cpu(tlv->type);
 800                 tlv_alt = le16_to_cpu(tlv->alternative);
 801                 tlv_data = tlv->data;
 802
 803                 if (len < tlv_len) {
 804                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
 805                                 len, tlv_len);
 806                         return -EINVAL;
 807                 }
 808                 len -= ALIGN(tlv_len, 4);
 809                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
 810
 811                 /*
 812                  * Alternative 0 is always valid.
 813                  *
 814                  * Skip alternative TLVs that are not selected.
 815                  */
 816                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
 817                         continue;
 818
 819                 switch (tlv_type) {
 820                 case IWL_UCODE_TLV_INST:
 821                         pieces->inst = tlv_data;
 822                         pieces->inst_size = tlv_len;
 823                         break;
 824                 case IWL_UCODE_TLV_DATA:
 825                         pieces->data = tlv_data;
 826                         pieces->data_size = tlv_len;
 827                         break;
 828                 case IWL_UCODE_TLV_INIT:
 829                         pieces->init = tlv_data;
 830                         pieces->init_size = tlv_len;
 831                         break;
 832                 case IWL_UCODE_TLV_INIT_DATA:
 833                         pieces->init_data = tlv_data;
 834                         pieces->init_data_size = tlv_len;
 835                         break;
 836                 case IWL_UCODE_TLV_BOOT:
 837                         IWL_ERR(priv, "Found unexpected BOOT ucode\n");
 838                         break;
 839                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
 840                         if (tlv_len != sizeof(u32))
 841                                 goto invalid_tlv_len;
 842                         capa->max_probe_length =
 843                                         le32_to_cpup((__le32 *)tlv_data);
 844                         break;
 845                 case IWL_UCODE_TLV_PAN:
 846                         if (tlv_len)
 847                                 goto invalid_tlv_len;
 848                         capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
 849                         break;
 850                 case IWL_UCODE_TLV_FLAGS:
 851                         /* must be at least one u32 */
 852                         if (tlv_len < sizeof(u32))
 853                                 goto invalid_tlv_len;
 854                         /* and a proper number of u32s */
 855                         if (tlv_len % sizeof(u32))
 856                                 goto invalid_tlv_len;
 857                         /*
 858                          * This driver only reads the first u32 as
 859                          * right now no more features are defined,
 860                          * if that changes then either the driver
 861                          * will not work with the new firmware, or
 862                          * it'll not take advantage of new features.
 863                          */
 864                         capa->flags = le32_to_cpup((__le32 *)tlv_data);
 865                         break;
 866                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
 867                         if (tlv_len != sizeof(u32))
 868                                 goto invalid_tlv_len;
 869                         pieces->init_evtlog_ptr =
 870                                         le32_to_cpup((__le32 *)tlv_data);
 871                         break;
 872                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
 873                         if (tlv_len != sizeof(u32))
 874                                 goto invalid_tlv_len;
 875                         pieces->init_evtlog_size =
 876                                         le32_to_cpup((__le32 *)tlv_data);
 877                         break;
 878                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
 879                         if (tlv_len != sizeof(u32))
 880                                 goto invalid_tlv_len;
 881                         pieces->init_errlog_ptr =
 882                                         le32_to_cpup((__le32 *)tlv_data);
 883                         break;
 884                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
 885                         if (tlv_len != sizeof(u32))
 886                                 goto invalid_tlv_len;
 887                         pieces->inst_evtlog_ptr =
 888                                         le32_to_cpup((__le32 *)tlv_data);
 889                         break;
 890                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
 891                         if (tlv_len != sizeof(u32))
 892                                 goto invalid_tlv_len;
 893                         pieces->inst_evtlog_size =
 894                                         le32_to_cpup((__le32 *)tlv_data);
 895                         break;
 896                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
 897                         if (tlv_len != sizeof(u32))
 898                                 goto invalid_tlv_len;
 899                         pieces->inst_errlog_ptr =
 900                                         le32_to_cpup((__le32 *)tlv_data);
 901                         break;
 902                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
 903                         if (tlv_len)
 904                                 goto invalid_tlv_len;
 905                         priv->enhance_sensitivity_table = true;
 906                         break;
 907                 case IWL_UCODE_TLV_WOWLAN_INST:
 908                         pieces->wowlan_inst = tlv_data;
 909                         pieces->wowlan_inst_size = tlv_len;
 910                         break;
 911                 case IWL_UCODE_TLV_WOWLAN_DATA:
 912                         pieces->wowlan_data = tlv_data;
 913                         pieces->wowlan_data_size = tlv_len;
 914                         break;
 915                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
 916                         if (tlv_len != sizeof(u32))
 917                                 goto invalid_tlv_len;
 918                         capa->standard_phy_calibration_size =
 919                                         le32_to_cpup((__le32 *)tlv_data);
 920                         break;
 921                 default:
 922                         IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
 923                         break;
 924                 }
 925         }
 926
 927         if (len) {
 928                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
 929                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
 930                 return -EINVAL;
 931         }
 932
 933         return 0;
 934
 935  invalid_tlv_len:
 936         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
 937         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
 938
 939         return -EINVAL;
 940 }
 941
 942 /**
 943  * iwl_ucode_callback - callback when firmware was loaded
 944  *
 945  * If loaded successfully, copies the firmware into buffers
 946  * for the card to fetch (via DMA).
 947  */
 948 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
 949 {
 950         struct iwl_priv *priv = context;
 951         struct iwl_ucode_header *ucode;
 952         int err;
 953         struct iwlagn_firmware_pieces pieces;
 954         const unsigned int api_max = priv->cfg->ucode_api_max;
 955         const unsigned int api_min = priv->cfg->ucode_api_min;
 956         u32 api_ver;
 957         char buildstr[25];
 958         u32 build;
 959         struct iwlagn_ucode_capabilities ucode_capa = {
 960                 .max_probe_length = 200,
 961                 .standard_phy_calibration_size =
 962                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
 963         };
 964
 965         memset(&pieces, 0, sizeof(pieces));
 966
 967         if (!ucode_raw) {
 968                 if (priv->fw_index <= priv->cfg->ucode_api_max)
 969                         IWL_ERR(priv,
 970                                 "request for firmware file '%s' failed.\n",
 971                                 priv->firmware_name);
 972                 goto try_again;
 973         }
 974
 975         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
 976                        priv->firmware_name, ucode_raw->size);
 977
 978         /* Make sure that we got at least the API version number */
 979         if (ucode_raw->size < 4) {
 980                 IWL_ERR(priv, "File size way too small!\n");
 981                 goto try_again;
 982         }
 983
 984         /* Data from ucode file:  header followed by uCode images */
 985         ucode = (struct iwl_ucode_header *)ucode_raw->data;
 986
 987         if (ucode->ver)
 988                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
 989         else
 990                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
 991                                            &ucode_capa);
 992
 993         if (err)
 994                 goto try_again;
 995
 996         api_ver = IWL_UCODE_API(priv->ucode_ver);
 997         build = pieces.build;
 998
 999         /*
1000          * api_ver should match the api version forming part of the
1001          * firmware filename ... but we don't check for that and only rely
1002          * on the API version read from firmware header from here on forward
1003          */
1004         /* no api version check required for experimental uCode */
1005         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1006                 if (api_ver < api_min || api_ver > api_max) {
1007                         IWL_ERR(priv,
1008                                 "Driver unable to support your firmware API. "
1009                                 "Driver supports v%u, firmware is v%u.\n",
1010                                 api_max, api_ver);
1011                         goto try_again;
1012                 }
1013
1014                 if (api_ver != api_max)
1015                         IWL_ERR(priv,
1016                                 "Firmware has old API version. Expected v%u, "
1017                                 "got v%u. New firmware can be obtained "
1018                                 "from http://www.intellinuxwireless.org.\n",
1019                                 api_max, api_ver);
1020         }
1021
1022         if (build)
1023                 sprintf(buildstr, " build %u%s", build,
1024                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1025                                 ? " (EXP)" : "");
1026         else
1027                 buildstr[0] = '\0';
1028
1029         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1030                  IWL_UCODE_MAJOR(priv->ucode_ver),
1031                  IWL_UCODE_MINOR(priv->ucode_ver),
1032                  IWL_UCODE_API(priv->ucode_ver),
1033                  IWL_UCODE_SERIAL(priv->ucode_ver),
1034                  buildstr);
1035
1036         snprintf(priv->hw->wiphy->fw_version,
1037                  sizeof(priv->hw->wiphy->fw_version),
1038                  "%u.%u.%u.%u%s",
1039                  IWL_UCODE_MAJOR(priv->ucode_ver),
1040                  IWL_UCODE_MINOR(priv->ucode_ver),
1041                  IWL_UCODE_API(priv->ucode_ver),
1042                  IWL_UCODE_SERIAL(priv->ucode_ver),
1043                  buildstr);
1044
1045         /*
1046          * For any of the failures below (before allocating pci memory)
1047          * we will try to load a version with a smaller API -- maybe the
1048          * user just got a corrupted version of the latest API.
1049          */
1050
1051         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1052                        priv->ucode_ver);
1053         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1054                        pieces.inst_size);
1055         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1056                        pieces.data_size);
1057         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1058                        pieces.init_size);
1059         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1060                        pieces.init_data_size);
1061
1062         /* Verify that uCode images will fit in card's SRAM */
1063         if (pieces.inst_size > priv->hw_params.max_inst_size) {
1064                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1065                         pieces.inst_size);
1066                 goto try_again;
1067         }
1068
1069         if (pieces.data_size > priv->hw_params.max_data_size) {
1070                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1071                         pieces.data_size);
1072                 goto try_again;
1073         }
1074
1075         if (pieces.init_size > priv->hw_params.max_inst_size) {
1076                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1077                         pieces.init_size);
1078                 goto try_again;
1079         }
1080
1081         if (pieces.init_data_size > priv->hw_params.max_data_size) {
1082                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1083                         pieces.init_data_size);
1084                 goto try_again;
1085         }
1086
1087         /* Allocate ucode buffers for card's bus-master loading ... */
1088
1089         /* Runtime instructions and 2 copies of data:
1090          * 1) unmodified from disk
1091          * 2) backup cache for save/restore during power-downs */
1092         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1093                               pieces.inst, pieces.inst_size))
1094                 goto err_pci_alloc;
1095         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1096                               pieces.data, pieces.data_size))
1097                 goto err_pci_alloc;
1098
1099         /* Initialization instructions and data */
1100         if (pieces.init_size && pieces.init_data_size) {
1101                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1102                                       pieces.init, pieces.init_size))
1103                         goto err_pci_alloc;
1104                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1105                                       pieces.init_data, pieces.init_data_size))
1106                         goto err_pci_alloc;
1107         }
1108
1109         /* WoWLAN instructions and data */
1110         if (pieces.wowlan_inst_size && pieces.wowlan_data_size) {
1111                 if (iwl_alloc_fw_desc(priv, &priv->ucode_wowlan.code,
1112                                       pieces.wowlan_inst,
1113                                       pieces.wowlan_inst_size))
1114                         goto err_pci_alloc;
1115                 if (iwl_alloc_fw_desc(priv, &priv->ucode_wowlan.data,
1116                                       pieces.wowlan_data,
1117                                       pieces.wowlan_data_size))
1118                         goto err_pci_alloc;
1119         }
1120
1121         /* Now that we can no longer fail, copy information */
1122
1123         /*
1124          * The (size - 16) / 12 formula is based on the information recorded
1125          * for each event, which is of mode 1 (including timestamp) for all
1126          * new microcodes that include this information.
1127          */
1128         priv->init_evtlog_ptr = pieces.init_evtlog_ptr;
1129         if (pieces.init_evtlog_size)
1130                 priv->init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1131         else
1132                 priv->init_evtlog_size =
1133                         priv->cfg->base_params->max_event_log_size;
1134         priv->init_errlog_ptr = pieces.init_errlog_ptr;
1135         priv->inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1136         if (pieces.inst_evtlog_size)
1137                 priv->inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1138         else
1139                 priv->inst_evtlog_size =
1140                         priv->cfg->base_params->max_event_log_size;
1141         priv->inst_errlog_ptr = pieces.inst_errlog_ptr;
1142
1143         priv->new_scan_threshold_behaviour =
1144                 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1145
1146         if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1147             (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1148                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1149                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1150         } else
1151                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1152
1153         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1154                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1155         else
1156                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1157
1158         /*
1159          * figure out the offset of chain noise reset and gain commands
1160          * base on the size of standard phy calibration commands table size
1161          */
1162         if (ucode_capa.standard_phy_calibration_size >
1163             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1164                 ucode_capa.standard_phy_calibration_size =
1165                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1166
1167         priv->phy_calib_chain_noise_reset_cmd =
1168                 ucode_capa.standard_phy_calibration_size;
1169         priv->phy_calib_chain_noise_gain_cmd =
1170                 ucode_capa.standard_phy_calibration_size + 1;
1171
1172         /**************************************************
1173          * This is still part of probe() in a sense...
1174          *
1175          * 9. Setup and register with mac80211 and debugfs
1176          **************************************************/
1177         err = iwl_mac_setup_register(priv, &ucode_capa);
1178         if (err)
1179                 goto out_unbind;
1180
1181         err = iwl_dbgfs_register(priv, DRV_NAME);
1182         if (err)
1183                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1184
1185         err = sysfs_create_group(&(priv->bus->dev->kobj),
1186                                         &iwl_attribute_group);
1187         if (err) {
1188                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1189                 goto out_unbind;
1190         }
1191
1192         /* We have our copies now, allow OS release its copies */
1193         release_firmware(ucode_raw);
1194         complete(&priv->firmware_loading_complete);
1195         return;
1196
1197  try_again:
1198         /* try next, if any */
1199         if (iwl_request_firmware(priv, false))
1200                 goto out_unbind;
1201         release_firmware(ucode_raw);
1202         return;
1203
1204  err_pci_alloc:
1205         IWL_ERR(priv, "failed to allocate pci memory\n");
1206         iwl_dealloc_ucode(priv);
1207  out_unbind:
1208         complete(&priv->firmware_loading_complete);
1209         device_release_driver(priv->bus->dev);
1210         release_firmware(ucode_raw);
1211 }
1212
1213 static const char * const desc_lookup_text[] = {
1214         "OK",
1215         "FAIL",
1216         "BAD_PARAM",
1217         "BAD_CHECKSUM",
1218         "NMI_INTERRUPT_WDG",
1219         "SYSASSERT",
1220         "FATAL_ERROR",
1221         "BAD_COMMAND",
1222         "HW_ERROR_TUNE_LOCK",
1223         "HW_ERROR_TEMPERATURE",
1224         "ILLEGAL_CHAN_FREQ",
1225         "VCC_NOT_STABLE",
1226         "FH_ERROR",
1227         "NMI_INTERRUPT_HOST",
1228         "NMI_INTERRUPT_ACTION_PT",
1229         "NMI_INTERRUPT_UNKNOWN",
1230         "UCODE_VERSION_MISMATCH",
1231         "HW_ERROR_ABS_LOCK",
1232         "HW_ERROR_CAL_LOCK_FAIL",
1233         "NMI_INTERRUPT_INST_ACTION_PT",
1234         "NMI_INTERRUPT_DATA_ACTION_PT",
1235         "NMI_TRM_HW_ER",
1236         "NMI_INTERRUPT_TRM",
1237         "NMI_INTERRUPT_BREAK_POINT",
1238         "DEBUG_0",
1239         "DEBUG_1",
1240         "DEBUG_2",
1241         "DEBUG_3",
1242 };
1243
1244 static struct { char *name; u8 num; } advanced_lookup[] = {
1245         { "NMI_INTERRUPT_WDG", 0x34 },
1246         { "SYSASSERT", 0x35 },
1247         { "UCODE_VERSION_MISMATCH", 0x37 },
1248         { "BAD_COMMAND", 0x38 },
1249         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1250         { "FATAL_ERROR", 0x3D },
1251         { "NMI_TRM_HW_ERR", 0x46 },
1252         { "NMI_INTERRUPT_TRM", 0x4C },
1253         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1254         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1255         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1256         { "NMI_INTERRUPT_HOST", 0x66 },
1257         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1258         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1259         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1260         { "ADVANCED_SYSASSERT", 0 },
1261 };
1262
1263 static const char *desc_lookup(u32 num)
1264 {
1265         int i;
1266         int max = ARRAY_SIZE(desc_lookup_text);
1267
1268         if (num < max)
1269                 return desc_lookup_text[num];
1270
1271         max = ARRAY_SIZE(advanced_lookup) - 1;
1272         for (i = 0; i < max; i++) {
1273                 if (advanced_lookup[i].num == num)
1274                         break;
1275         }
1276         return advanced_lookup[i].name;
1277 }
1278
1279 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1280 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1281
1282 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1283 {
1284         u32 base;
1285         struct iwl_error_event_table table;
1286
1287         base = priv->device_pointers.error_event_table;
1288         if (priv->ucode_type == IWL_UCODE_INIT) {
1289                 if (!base)
1290                         base = priv->init_errlog_ptr;
1291         } else {
1292                 if (!base)
1293                         base = priv->inst_errlog_ptr;
1294         }
1295
1296         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1297                 IWL_ERR(priv,
1298                         "Not valid error log pointer 0x%08X for %s uCode\n",
1299                         base,
1300                         (priv->ucode_type == IWL_UCODE_INIT)
1301                                         ? "Init" : "RT");
1302                 return;
1303         }
1304
1305         iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1306
1307         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1308                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1309                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1310                         priv->status, table.valid);
1311         }
1312
1313         priv->isr_stats.err_code = table.error_id;
1314
1315         trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1316                                       table.data1, table.data2, table.line,
1317                                       table.blink1, table.blink2, table.ilink1,
1318                                       table.ilink2, table.bcon_time, table.gp1,
1319                                       table.gp2, table.gp3, table.ucode_ver,
1320                                       table.hw_ver, table.brd_ver);
1321         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1322                 desc_lookup(table.error_id));
1323         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1324         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1325         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1326         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1327         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1328         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1329         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1330         IWL_ERR(priv, "0x%08X | line\n", table.line);
1331         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1332         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1333         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1334         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1335         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1336         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1337         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1338         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1339         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1340         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1341 }
1342
1343 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1344
1345 /**
1346  * iwl_print_event_log - Dump error event log to syslog
1347  *
1348  */
1349 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1350                                u32 num_events, u32 mode,
1351                                int pos, char **buf, size_t bufsz)
1352 {
1353         u32 i;
1354         u32 base;       /* SRAM byte address of event log header */
1355         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1356         u32 ptr;        /* SRAM byte address of log data */
1357         u32 ev, time, data; /* event log data */
1358         unsigned long reg_flags;
1359
1360         if (num_events == 0)
1361                 return pos;
1362
1363         base = priv->device_pointers.log_event_table;
1364         if (priv->ucode_type == IWL_UCODE_INIT) {
1365                 if (!base)
1366                         base = priv->init_evtlog_ptr;
1367         } else {
1368                 if (!base)
1369                         base = priv->inst_evtlog_ptr;
1370         }
1371
1372         if (mode == 0)
1373                 event_size = 2 * sizeof(u32);
1374         else
1375                 event_size = 3 * sizeof(u32);
1376
1377         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1378
1379         /* Make sure device is powered up for SRAM reads */
1380         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1381         iwl_grab_nic_access(priv);
1382
1383         /* Set starting address; reads will auto-increment */
1384         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1385         rmb();
1386
1387         /* "time" is actually "data" for mode 0 (no timestamp).
1388         * place event id # at far right for easier visual parsing. */
1389         for (i = 0; i < num_events; i++) {
1390                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1391                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1392                 if (mode == 0) {
1393                         /* data, ev */
1394                         if (bufsz) {
1395                                 pos += scnprintf(*buf + pos, bufsz - pos,
1396                                                 "EVT_LOG:0x%08x:%04u\n",
1397                                                 time, ev);
1398                         } else {
1399                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1400                                         time, ev);
1401                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1402                                         time, ev);
1403                         }
1404                 } else {
1405                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1406                         if (bufsz) {
1407                                 pos += scnprintf(*buf + pos, bufsz - pos,
1408                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1409                                                  time, data, ev);
1410                         } else {
1411                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1412                                         time, data, ev);
1413                                 trace_iwlwifi_dev_ucode_event(priv, time,
1414                                         data, ev);
1415                         }
1416                 }
1417         }
1418
1419         /* Allow device to power down */
1420         iwl_release_nic_access(priv);
1421         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1422         return pos;
1423 }
1424
1425 /**
1426  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1427  */
1428 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1429                                     u32 num_wraps, u32 next_entry,
1430                                     u32 size, u32 mode,
1431                                     int pos, char **buf, size_t bufsz)
1432 {
1433         /*
1434          * display the newest DEFAULT_LOG_ENTRIES entries
1435          * i.e the entries just before the next ont that uCode would fill.
1436          */
1437         if (num_wraps) {
1438                 if (next_entry < size) {
1439                         pos = iwl_print_event_log(priv,
1440                                                 capacity - (size - next_entry),
1441                                                 size - next_entry, mode,
1442                                                 pos, buf, bufsz);
1443                         pos = iwl_print_event_log(priv, 0,
1444                                                   next_entry, mode,
1445                                                   pos, buf, bufsz);
1446                 } else
1447                         pos = iwl_print_event_log(priv, next_entry - size,
1448                                                   size, mode, pos, buf, bufsz);
1449         } else {
1450                 if (next_entry < size) {
1451                         pos = iwl_print_event_log(priv, 0, next_entry,
1452                                                   mode, pos, buf, bufsz);
1453                 } else {
1454                         pos = iwl_print_event_log(priv, next_entry - size,
1455                                                   size, mode, pos, buf, bufsz);
1456                 }
1457         }
1458         return pos;
1459 }
1460
1461 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1462
1463 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1464                             char **buf, bool display)
1465 {
1466         u32 base;       /* SRAM byte address of event log header */
1467         u32 capacity;   /* event log capacity in # entries */
1468         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1469         u32 num_wraps;  /* # times uCode wrapped to top of log */
1470         u32 next_entry; /* index of next entry to be written by uCode */
1471         u32 size;       /* # entries that we'll print */
1472         u32 logsize;
1473         int pos = 0;
1474         size_t bufsz = 0;
1475
1476         base = priv->device_pointers.log_event_table;
1477         if (priv->ucode_type == IWL_UCODE_INIT) {
1478                 logsize = priv->init_evtlog_size;
1479                 if (!base)
1480                         base = priv->init_evtlog_ptr;
1481         } else {
1482                 logsize = priv->inst_evtlog_size;
1483                 if (!base)
1484                         base = priv->inst_evtlog_ptr;
1485         }
1486
1487         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1488                 IWL_ERR(priv,
1489                         "Invalid event log pointer 0x%08X for %s uCode\n",
1490                         base,
1491                         (priv->ucode_type == IWL_UCODE_INIT)
1492                                         ? "Init" : "RT");
1493                 return -EINVAL;
1494         }
1495
1496         /* event log header */
1497         capacity = iwl_read_targ_mem(priv, base);
1498         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1499         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1500         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1501
1502         if (capacity > logsize) {
1503                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1504                         capacity, logsize);
1505                 capacity = logsize;
1506         }
1507
1508         if (next_entry > logsize) {
1509                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1510                         next_entry, logsize);
1511                 next_entry = logsize;
1512         }
1513
1514         size = num_wraps ? capacity : next_entry;
1515
1516         /* bail out if nothing in log */
1517         if (size == 0) {
1518                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1519                 return pos;
1520         }
1521
1522         /* enable/disable bt channel inhibition */
1523         priv->bt_ch_announce = iwlagn_bt_ch_announce;
1524
1525 #ifdef CONFIG_IWLWIFI_DEBUG
1526         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1527                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1528                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1529 #else
1530         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1531                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1532 #endif
1533         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1534                 size);
1535
1536 #ifdef CONFIG_IWLWIFI_DEBUG
1537         if (display) {
1538                 if (full_log)
1539                         bufsz = capacity * 48;
1540                 else
1541                         bufsz = size * 48;
1542                 *buf = kmalloc(bufsz, GFP_KERNEL);
1543                 if (!*buf)
1544                         return -ENOMEM;
1545         }
1546         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1547                 /*
1548                  * if uCode has wrapped back to top of log,
1549                  * start at the oldest entry,
1550                  * i.e the next one that uCode would fill.
1551                  */
1552                 if (num_wraps)
1553                         pos = iwl_print_event_log(priv, next_entry,
1554                                                 capacity - next_entry, mode,
1555                                                 pos, buf, bufsz);
1556                 /* (then/else) start at top of log */
1557                 pos = iwl_print_event_log(priv, 0,
1558                                           next_entry, mode, pos, buf, bufsz);
1559         } else
1560                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1561                                                 next_entry, size, mode,
1562                                                 pos, buf, bufsz);
1563 #else
1564         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1565                                         next_entry, size, mode,
1566                                         pos, buf, bufsz);
1567 #endif
1568         return pos;
1569 }
1570
1571 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1572 {
1573         struct iwl_ct_kill_config cmd;
1574         struct iwl_ct_kill_throttling_config adv_cmd;
1575         unsigned long flags;
1576         int ret = 0;
1577
1578         spin_lock_irqsave(&priv->lock, flags);
1579         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1580                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1581         spin_unlock_irqrestore(&priv->lock, flags);
1582         priv->thermal_throttle.ct_kill_toggle = false;
1583
1584         if (priv->cfg->base_params->support_ct_kill_exit) {
1585                 adv_cmd.critical_temperature_enter =
1586                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1587                 adv_cmd.critical_temperature_exit =
1588                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1589
1590                 ret = trans_send_cmd_pdu(&priv->trans,
1591                                        REPLY_CT_KILL_CONFIG_CMD,
1592                                        CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
1593                 if (ret)
1594                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1595                 else
1596                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1597                                         "succeeded, "
1598                                         "critical temperature enter is %d,"
1599                                         "exit is %d\n",
1600                                        priv->hw_params.ct_kill_threshold,
1601                                        priv->hw_params.ct_kill_exit_threshold);
1602         } else {
1603                 cmd.critical_temperature_R =
1604                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1605
1606                 ret = trans_send_cmd_pdu(&priv->trans,
1607                                        REPLY_CT_KILL_CONFIG_CMD,
1608                                        CMD_SYNC, sizeof(cmd), &cmd);
1609                 if (ret)
1610                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1611                 else
1612                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1613                                         "succeeded, "
1614                                         "critical temperature is %d\n",
1615                                         priv->hw_params.ct_kill_threshold);
1616         }
1617 }
1618
1619 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1620 {
1621         struct iwl_calib_cfg_cmd calib_cfg_cmd;
1622         struct iwl_host_cmd cmd = {
1623                 .id = CALIBRATION_CFG_CMD,
1624                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1625                 .data = { &calib_cfg_cmd, },
1626         };
1627
1628         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1629         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1630         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1631
1632         return trans_send_cmd(&priv->trans, &cmd);
1633 }
1634
1635
1636 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
1637 {
1638         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
1639           .valid = cpu_to_le32(valid_tx_ant),
1640         };
1641
1642         if (IWL_UCODE_API(priv->ucode_ver) > 1) {
1643                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
1644                 return trans_send_cmd_pdu(&priv->trans,
1645                                         TX_ANT_CONFIGURATION_CMD,
1646                                         CMD_SYNC,
1647                                         sizeof(struct iwl_tx_ant_config_cmd),
1648                                         &tx_ant_cmd);
1649         } else {
1650                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
1651                 return -EOPNOTSUPP;
1652         }
1653 }
1654
1655 /**
1656  * iwl_alive_start - called after REPLY_ALIVE notification received
1657  *                   from protocol/runtime uCode (initialization uCode's
1658  *                   Alive gets handled by iwl_init_alive_start()).
1659  */
1660 int iwl_alive_start(struct iwl_priv *priv)
1661 {
1662         int ret = 0;
1663         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1664
1665         /*TODO: this should go to the transport layer */
1666         iwl_reset_ict(priv);
1667
1668         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1669
1670         /* After the ALIVE response, we can send host commands to the uCode */
1671         set_bit(STATUS_ALIVE, &priv->status);
1672
1673         /* Enable watchdog to monitor the driver tx queues */
1674         iwl_setup_watchdog(priv);
1675
1676         if (iwl_is_rfkill(priv))
1677                 return -ERFKILL;
1678
1679         /* download priority table before any calibration request */
1680         if (priv->cfg->bt_params &&
1681             priv->cfg->bt_params->advanced_bt_coexist) {
1682                 /* Configure Bluetooth device coexistence support */
1683                 if (priv->cfg->bt_params->bt_sco_disable)
1684                         priv->bt_enable_pspoll = false;
1685                 else
1686                         priv->bt_enable_pspoll = true;
1687
1688                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1689                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1690                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1691                 iwlagn_send_advance_bt_config(priv);
1692                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
1693                 priv->cur_rssi_ctx = NULL;
1694
1695                 iwlagn_send_prio_tbl(priv);
1696
1697                 /* FIXME: w/a to force change uCode BT state machine */
1698                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
1699                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
1700                 if (ret)
1701                         return ret;
1702                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
1703                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
1704                 if (ret)
1705                         return ret;
1706         } else {
1707                 /*
1708                  * default is 2-wire BT coexexistence support
1709                  */
1710                 iwl_send_bt_config(priv);
1711         }
1712
1713         if (priv->hw_params.calib_rt_cfg)
1714                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
1715
1716         ieee80211_wake_queues(priv->hw);
1717
1718         priv->active_rate = IWL_RATES_MASK;
1719
1720         /* Configure Tx antenna selection based on H/W config */
1721         iwlagn_send_tx_ant_config(priv, priv->cfg->valid_tx_ant);
1722
1723         if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
1724                 struct iwl_rxon_cmd *active_rxon =
1725                                 (struct iwl_rxon_cmd *)&ctx->active;
1726                 /* apply any changes in staging */
1727                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1728                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1729         } else {
1730                 struct iwl_rxon_context *tmp;
1731                 /* Initialize our rx_config data */
1732                 for_each_context(priv, tmp)
1733                         iwl_connection_init_rx_config(priv, tmp);
1734
1735                 iwlagn_set_rxon_chain(priv, ctx);
1736         }
1737
1738         if (!priv->wowlan) {
1739                 /* WoWLAN ucode will not reply in the same way, skip it */
1740                 iwl_reset_run_time_calib(priv);
1741         }
1742
1743         set_bit(STATUS_READY, &priv->status);
1744
1745         /* Configure the adapter for unassociated operation */
1746         ret = iwlagn_commit_rxon(priv, ctx);
1747         if (ret)
1748                 return ret;
1749
1750         /* At this point, the NIC is initialized and operational */
1751         iwl_rf_kill_ct_config(priv);
1752
1753         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1754
1755         return iwl_power_update_mode(priv, true);
1756 }
1757
1758 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1759
1760 static void __iwl_down(struct iwl_priv *priv)
1761 {
1762         int exit_pending;
1763
1764         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1765
1766         iwl_scan_cancel_timeout(priv, 200);
1767
1768         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
1769
1770         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
1771          * to prevent rearm timer */
1772         del_timer_sync(&priv->watchdog);
1773
1774         iwl_clear_ucode_stations(priv, NULL);
1775         iwl_dealloc_bcast_stations(priv);
1776         iwl_clear_driver_stations(priv);
1777
1778         /* reset BT coex data */
1779         priv->bt_status = 0;
1780         priv->cur_rssi_ctx = NULL;
1781         priv->bt_is_sco = 0;
1782         if (priv->cfg->bt_params)
1783                 priv->bt_traffic_load =
1784                          priv->cfg->bt_params->bt_init_traffic_load;
1785         else
1786                 priv->bt_traffic_load = 0;
1787         priv->bt_full_concurrent = false;
1788         priv->bt_ci_compliance = 0;
1789
1790         /* Wipe out the EXIT_PENDING status bit if we are not actually
1791          * exiting the module */
1792         if (!exit_pending)
1793                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1794
1795         if (priv->mac80211_registered)
1796                 ieee80211_stop_queues(priv->hw);
1797
1798         /* Clear out all status bits but a few that are stable across reset */
1799         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1800                                 STATUS_RF_KILL_HW |
1801                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1802                                 STATUS_GEO_CONFIGURED |
1803                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1804                                 STATUS_FW_ERROR |
1805                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1806                                 STATUS_EXIT_PENDING;
1807
1808         trans_stop_device(&priv->trans);
1809
1810         dev_kfree_skb(priv->beacon_skb);
1811         priv->beacon_skb = NULL;
1812 }
1813
1814 static void iwl_down(struct iwl_priv *priv)
1815 {
1816         mutex_lock(&priv->mutex);
1817         __iwl_down(priv);
1818         mutex_unlock(&priv->mutex);
1819
1820         iwl_cancel_deferred_work(priv);
1821 }
1822
1823 #define MAX_HW_RESTARTS 5
1824
1825 static int __iwl_up(struct iwl_priv *priv)
1826 {
1827         struct iwl_rxon_context *ctx;
1828         int ret;
1829
1830         lockdep_assert_held(&priv->mutex);
1831
1832         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1833                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1834                 return -EIO;
1835         }
1836
1837         for_each_context(priv, ctx) {
1838                 ret = iwlagn_alloc_bcast_station(priv, ctx);
1839                 if (ret) {
1840                         iwl_dealloc_bcast_stations(priv);
1841                         return ret;
1842                 }
1843         }
1844
1845         ret = iwlagn_run_init_ucode(priv);
1846         if (ret) {
1847                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
1848                 goto error;
1849         }
1850
1851         ret = iwlagn_load_ucode_wait_alive(priv,
1852                                            &priv->ucode_rt,
1853                                            IWL_UCODE_REGULAR);
1854         if (ret) {
1855                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
1856                 goto error;
1857         }
1858
1859         ret = iwl_alive_start(priv);
1860         if (ret)
1861                 goto error;
1862         return 0;
1863
1864  error:
1865         set_bit(STATUS_EXIT_PENDING, &priv->status);
1866         __iwl_down(priv);
1867         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1868
1869         IWL_ERR(priv, "Unable to initialize device.\n");
1870         return ret;
1871 }
1872
1873
1874 /*****************************************************************************
1875  *
1876  * Workqueue callbacks
1877  *
1878  *****************************************************************************/
1879
1880 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1881 {
1882         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1883                         run_time_calib_work);
1884
1885         mutex_lock(&priv->mutex);
1886
1887         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1888             test_bit(STATUS_SCANNING, &priv->status)) {
1889                 mutex_unlock(&priv->mutex);
1890                 return;
1891         }
1892
1893         if (priv->start_calib) {
1894                 iwl_chain_noise_calibration(priv);
1895                 iwl_sensitivity_calibration(priv);
1896         }
1897
1898         mutex_unlock(&priv->mutex);
1899 }
1900
1901 static void iwlagn_prepare_restart(struct iwl_priv *priv)
1902 {
1903         struct iwl_rxon_context *ctx;
1904         bool bt_full_concurrent;
1905         u8 bt_ci_compliance;
1906         u8 bt_load;
1907         u8 bt_status;
1908         bool bt_is_sco;
1909
1910         lockdep_assert_held(&priv->mutex);
1911
1912         for_each_context(priv, ctx)
1913                 ctx->vif = NULL;
1914         priv->is_open = 0;
1915
1916         /*
1917          * __iwl_down() will clear the BT status variables,
1918          * which is correct, but when we restart we really
1919          * want to keep them so restore them afterwards.
1920          *
1921          * The restart process will later pick them up and
1922          * re-configure the hw when we reconfigure the BT
1923          * command.
1924          */
1925         bt_full_concurrent = priv->bt_full_concurrent;
1926         bt_ci_compliance = priv->bt_ci_compliance;
1927         bt_load = priv->bt_traffic_load;
1928         bt_status = priv->bt_status;
1929         bt_is_sco = priv->bt_is_sco;
1930
1931         __iwl_down(priv);
1932
1933         priv->bt_full_concurrent = bt_full_concurrent;
1934         priv->bt_ci_compliance = bt_ci_compliance;
1935         priv->bt_traffic_load = bt_load;
1936         priv->bt_status = bt_status;
1937         priv->bt_is_sco = bt_is_sco;
1938 }
1939
1940 static void iwl_bg_restart(struct work_struct *data)
1941 {
1942         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1943
1944         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1945                 return;
1946
1947         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
1948                 mutex_lock(&priv->mutex);
1949                 iwlagn_prepare_restart(priv);
1950                 mutex_unlock(&priv->mutex);
1951                 iwl_cancel_deferred_work(priv);
1952                 ieee80211_restart_hw(priv->hw);
1953         } else {
1954                 WARN_ON(1);
1955         }
1956 }
1957
1958 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
1959                                  struct ieee80211_channel *chan,
1960                                  enum nl80211_channel_type channel_type,
1961                                  unsigned int wait)
1962 {
1963         struct iwl_priv *priv = hw->priv;
1964         int ret;
1965
1966         /* Not supported if we don't have PAN */
1967         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
1968                 ret = -EOPNOTSUPP;
1969                 goto free;
1970         }
1971
1972         /* Not supported on pre-P2P firmware */
1973         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
1974                                         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
1975                 ret = -EOPNOTSUPP;
1976                 goto free;
1977         }
1978
1979         mutex_lock(&priv->mutex);
1980
1981         if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
1982                 /*
1983                  * If the PAN context is free, use the normal
1984                  * way of doing remain-on-channel offload + TX.
1985                  */
1986                 ret = 1;
1987                 goto out;
1988         }
1989
1990         /* TODO: queue up if scanning? */
1991         if (test_bit(STATUS_SCANNING, &priv->status) ||
1992             priv->offchan_tx_skb) {
1993                 ret = -EBUSY;
1994                 goto out;
1995         }
1996
1997         /*
1998          * max_scan_ie_len doesn't include the blank SSID or the header,
1999          * so need to add that again here.
2000          */
2001         if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2002                 ret = -ENOBUFS;
2003                 goto out;
2004         }
2005
2006         priv->offchan_tx_skb = skb;
2007         priv->offchan_tx_timeout = wait;
2008         priv->offchan_tx_chan = chan;
2009
2010         ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2011                                 IWL_SCAN_OFFCH_TX, chan->band);
2012         if (ret)
2013                 priv->offchan_tx_skb = NULL;
2014  out:
2015         mutex_unlock(&priv->mutex);
2016  free:
2017         if (ret < 0)
2018                 kfree_skb(skb);
2019
2020         return ret;
2021 }
2022
2023 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2024 {
2025         struct iwl_priv *priv = hw->priv;
2026         int ret;
2027
2028         mutex_lock(&priv->mutex);
2029
2030         if (!priv->offchan_tx_skb) {
2031                 ret = -EINVAL;
2032                 goto unlock;
2033         }
2034
2035         priv->offchan_tx_skb = NULL;
2036
2037         ret = iwl_scan_cancel_timeout(priv, 200);
2038         if (ret)
2039                 ret = -EIO;
2040 unlock:
2041         mutex_unlock(&priv->mutex);
2042
2043         return ret;
2044 }
2045
2046 /*****************************************************************************
2047  *
2048  * mac80211 entry point functions
2049  *
2050  *****************************************************************************/
2051
2052 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2053         {
2054                 .max = 1,
2055                 .types = BIT(NL80211_IFTYPE_STATION),
2056         },
2057         {
2058                 .max = 1,
2059                 .types = BIT(NL80211_IFTYPE_AP),
2060         },
2061 };
2062
2063 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2064         {
2065                 .max = 2,
2066                 .types = BIT(NL80211_IFTYPE_STATION),
2067         },
2068 };
2069
2070 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2071         {
2072                 .max = 1,
2073                 .types = BIT(NL80211_IFTYPE_STATION),
2074         },
2075         {
2076                 .max = 1,
2077                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2078                          BIT(NL80211_IFTYPE_AP),
2079         },
2080 };
2081
2082 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2083         {
2084                 .max = 2,
2085                 .types = BIT(NL80211_IFTYPE_STATION),
2086         },
2087         {
2088                 .max = 1,
2089                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2090         },
2091 };
2092
2093 static const struct ieee80211_iface_combination
2094 iwlagn_iface_combinations_dualmode[] = {
2095         { .num_different_channels = 1,
2096           .max_interfaces = 2,
2097           .beacon_int_infra_match = true,
2098           .limits = iwlagn_sta_ap_limits,
2099           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2100         },
2101         { .num_different_channels = 1,
2102           .max_interfaces = 2,
2103           .limits = iwlagn_2sta_limits,
2104           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2105         },
2106 };
2107
2108 static const struct ieee80211_iface_combination
2109 iwlagn_iface_combinations_p2p[] = {
2110         { .num_different_channels = 1,
2111           .max_interfaces = 2,
2112           .beacon_int_infra_match = true,
2113           .limits = iwlagn_p2p_sta_go_limits,
2114           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2115         },
2116         { .num_different_channels = 1,
2117           .max_interfaces = 2,
2118           .limits = iwlagn_p2p_2sta_limits,
2119           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2120         },
2121 };
2122
2123 /*
2124  * Not a mac80211 entry point function, but it fits in with all the
2125  * other mac80211 functions grouped here.
2126  */
2127 static int iwl_mac_setup_register(struct iwl_priv *priv,
2128                                   struct iwlagn_ucode_capabilities *capa)
2129 {
2130         int ret;
2131         struct ieee80211_hw *hw = priv->hw;
2132         struct iwl_rxon_context *ctx;
2133
2134         hw->rate_control_algorithm = "iwl-agn-rs";
2135
2136         /* Tell mac80211 our characteristics */
2137         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2138                     IEEE80211_HW_AMPDU_AGGREGATION |
2139                     IEEE80211_HW_NEED_DTIM_PERIOD |
2140                     IEEE80211_HW_SPECTRUM_MGMT |
2141                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2142
2143         /*
2144          * Including the following line will crash some AP's.  This
2145          * workaround removes the stimulus which causes the crash until
2146          * the AP software can be fixed.
2147         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2148          */
2149
2150         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2151                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2152
2153         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2154                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2155                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2156
2157         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2158                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2159
2160         hw->sta_data_size = sizeof(struct iwl_station_priv);
2161         hw->vif_data_size = sizeof(struct iwl_vif_priv);
2162
2163         for_each_context(priv, ctx) {
2164                 hw->wiphy->interface_modes |= ctx->interface_modes;
2165                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2166         }
2167
2168         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2169
2170         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2171                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2172                 hw->wiphy->n_iface_combinations =
2173                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2174         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2175                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2176                 hw->wiphy->n_iface_combinations =
2177                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2178         }
2179
2180         hw->wiphy->max_remain_on_channel_duration = 1000;
2181
2182         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2183                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
2184                             WIPHY_FLAG_IBSS_RSN;
2185
2186         if (priv->ucode_wowlan.code.len && device_can_wakeup(priv->bus->dev)) {
2187                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
2188                                           WIPHY_WOWLAN_DISCONNECT |
2189                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
2190                                           WIPHY_WOWLAN_RFKILL_RELEASE;
2191                 if (!iwlagn_mod_params.sw_crypto)
2192                         hw->wiphy->wowlan.flags |=
2193                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
2194                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
2195
2196                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
2197                 hw->wiphy->wowlan.pattern_min_len =
2198                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
2199                 hw->wiphy->wowlan.pattern_max_len =
2200                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
2201         }
2202
2203         if (iwlagn_mod_params.power_save)
2204                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2205         else
2206                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2207
2208         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2209         /* we create the 802.11 header and a zero-length SSID element */
2210         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2211
2212         /* Default value; 4 EDCA QOS priorities */
2213         hw->queues = 4;
2214
2215         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2216
2217         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2218                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2219                         &priv->bands[IEEE80211_BAND_2GHZ];
2220         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2221                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2222                         &priv->bands[IEEE80211_BAND_5GHZ];
2223
2224         iwl_leds_init(priv);
2225
2226         ret = ieee80211_register_hw(priv->hw);
2227         if (ret) {
2228                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2229                 return ret;
2230         }
2231         priv->mac80211_registered = 1;
2232
2233         return 0;
2234 }
2235
2236
2237 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2238 {
2239         struct iwl_priv *priv = hw->priv;
2240         int ret;
2241
2242         IWL_DEBUG_MAC80211(priv, "enter\n");
2243
2244         /* we should be verifying the device is ready to be opened */
2245         mutex_lock(&priv->mutex);
2246         ret = __iwl_up(priv);
2247         mutex_unlock(&priv->mutex);
2248         if (ret)
2249                 return ret;
2250
2251         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2252
2253         /* Now we should be done, and the READY bit should be set. */
2254         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2255                 ret = -EIO;
2256
2257         iwlagn_led_enable(priv);
2258
2259         priv->is_open = 1;
2260         IWL_DEBUG_MAC80211(priv, "leave\n");
2261         return 0;
2262 }
2263
2264 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2265 {
2266         struct iwl_priv *priv = hw->priv;
2267
2268         IWL_DEBUG_MAC80211(priv, "enter\n");
2269
2270         if (!priv->is_open)
2271                 return;
2272
2273         priv->is_open = 0;
2274
2275         iwl_down(priv);
2276
2277         flush_workqueue(priv->workqueue);
2278
2279         /* User space software may expect getting rfkill changes
2280          * even if interface is down */
2281         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2282         iwl_enable_rfkill_int(priv);
2283
2284         IWL_DEBUG_MAC80211(priv, "leave\n");
2285 }
2286
2287 #ifdef CONFIG_PM
2288 static int iwlagn_send_patterns(struct iwl_priv *priv,
2289                                 struct cfg80211_wowlan *wowlan)
2290 {
2291         struct iwlagn_wowlan_patterns_cmd *pattern_cmd;
2292         struct iwl_host_cmd cmd = {
2293                 .id = REPLY_WOWLAN_PATTERNS,
2294                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
2295                 .flags = CMD_SYNC,
2296         };
2297         int i, err;
2298
2299         if (!wowlan->n_patterns)
2300                 return 0;
2301
2302         cmd.len[0] = sizeof(*pattern_cmd) +
2303                         wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern);
2304
2305         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
2306         if (!pattern_cmd)
2307                 return -ENOMEM;
2308
2309         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
2310
2311         for (i = 0; i < wowlan->n_patterns; i++) {
2312                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
2313
2314                 memcpy(&pattern_cmd->patterns[i].mask,
2315                         wowlan->patterns[i].mask, mask_len);
2316                 memcpy(&pattern_cmd->patterns[i].pattern,
2317                         wowlan->patterns[i].pattern,
2318                         wowlan->patterns[i].pattern_len);
2319                 pattern_cmd->patterns[i].mask_size = mask_len;
2320                 pattern_cmd->patterns[i].pattern_size =
2321                         wowlan->patterns[i].pattern_len;
2322         }
2323
2324         cmd.data[0] = pattern_cmd;
2325         err = trans_send_cmd(&priv->trans, &cmd);
2326         kfree(pattern_cmd);
2327         return err;
2328 }
2329 #endif
2330
2331 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
2332                                       struct ieee80211_vif *vif,
2333                                       struct cfg80211_gtk_rekey_data *data)
2334 {
2335         struct iwl_priv *priv = hw->priv;
2336
2337         if (iwlagn_mod_params.sw_crypto)
2338                 return;
2339
2340         mutex_lock(&priv->mutex);
2341
2342         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
2343                 goto out;
2344
2345         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
2346         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
2347         priv->replay_ctr = cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
2348         priv->have_rekey_data = true;
2349
2350  out:
2351         mutex_unlock(&priv->mutex);
2352 }
2353
2354 struct wowlan_key_data {
2355         struct iwl_rxon_context *ctx;
2356         struct iwlagn_wowlan_rsc_tsc_params_cmd *rsc_tsc;
2357         struct iwlagn_wowlan_tkip_params_cmd *tkip;
2358         const u8 *bssid;
2359         bool error, use_rsc_tsc, use_tkip;
2360 };
2361
2362 #ifdef CONFIG_PM
2363 static void iwlagn_convert_p1k(u16 *p1k, __le16 *out)
2364 {
2365         int i;
2366
2367         for (i = 0; i < IWLAGN_P1K_SIZE; i++)
2368                 out[i] = cpu_to_le16(p1k[i]);
2369 }
2370
2371 static void iwlagn_wowlan_program_keys(struct ieee80211_hw *hw,
2372                                        struct ieee80211_vif *vif,
2373                                        struct ieee80211_sta *sta,
2374                                        struct ieee80211_key_conf *key,
2375                                        void *_data)
2376 {
2377         struct iwl_priv *priv = hw->priv;
2378         struct wowlan_key_data *data = _data;
2379         struct iwl_rxon_context *ctx = data->ctx;
2380         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
2381         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
2382         struct iwlagn_p1k_cache *rx_p1ks;
2383         u8 *rx_mic_key;
2384         struct ieee80211_key_seq seq;
2385         u32 cur_rx_iv32 = 0;
2386         u16 p1k[IWLAGN_P1K_SIZE];
2387         int ret, i;
2388
2389         mutex_lock(&priv->mutex);
2390
2391         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2392              key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2393              !sta && !ctx->key_mapping_keys)
2394                 ret = iwl_set_default_wep_key(priv, ctx, key);
2395         else
2396                 ret = iwl_set_dynamic_key(priv, ctx, key, sta);
2397
2398         if (ret) {
2399                 IWL_ERR(priv, "Error setting key during suspend!\n");
2400                 data->error = true;
2401         }
2402
2403         switch (key->cipher) {
2404         case WLAN_CIPHER_SUITE_TKIP:
2405                 if (sta) {
2406                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
2407                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
2408
2409                         rx_p1ks = data->tkip->rx_uni;
2410
2411                         ieee80211_get_key_tx_seq(key, &seq);
2412                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
2413                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
2414
2415                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
2416                         iwlagn_convert_p1k(p1k, data->tkip->tx.p1k);
2417
2418                         memcpy(data->tkip->mic_keys.tx,
2419                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2420                                IWLAGN_MIC_KEY_SIZE);
2421
2422                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
2423                 } else {
2424                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
2425                         rx_p1ks = data->tkip->rx_multi;
2426                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
2427                 }
2428
2429                 /*
2430                  * For non-QoS this relies on the fact that both the uCode and
2431                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
2432                  * for checking the IV in the frames.
2433                  */
2434                 for (i = 0; i < IWLAGN_NUM_RSC; i++) {
2435                         ieee80211_get_key_rx_seq(key, i, &seq);
2436                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
2437                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
2438                         /* wrapping isn't allowed, AP must rekey */
2439                         if (seq.tkip.iv32 > cur_rx_iv32)
2440                                 cur_rx_iv32 = seq.tkip.iv32;
2441                 }
2442
2443                 ieee80211_get_tkip_rx_p1k(key, data->bssid, cur_rx_iv32, p1k);
2444                 iwlagn_convert_p1k(p1k, rx_p1ks[0].p1k);
2445                 ieee80211_get_tkip_rx_p1k(key, data->bssid,
2446                                           cur_rx_iv32 + 1, p1k);
2447                 iwlagn_convert_p1k(p1k, rx_p1ks[1].p1k);
2448
2449                 memcpy(rx_mic_key,
2450                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2451                        IWLAGN_MIC_KEY_SIZE);
2452
2453                 data->use_tkip = true;
2454                 data->use_rsc_tsc = true;
2455                 break;
2456         case WLAN_CIPHER_SUITE_CCMP:
2457                 if (sta) {
2458                         u8 *pn = seq.ccmp.pn;
2459
2460                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
2461                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
2462
2463                         ieee80211_get_key_tx_seq(key, &seq);
2464                         aes_tx_sc->pn = cpu_to_le64(
2465                                         (u64)pn[5] |
2466                                         ((u64)pn[4] << 8) |
2467                                         ((u64)pn[3] << 16) |
2468                                         ((u64)pn[2] << 24) |
2469                                         ((u64)pn[1] << 32) |
2470                                         ((u64)pn[0] << 40));
2471                 } else
2472                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
2473
2474                 /*
2475                  * For non-QoS this relies on the fact that both the uCode and
2476                  * mac80211 use TID 0 for checking the IV in the frames.
2477                  */
2478                 for (i = 0; i < IWLAGN_NUM_RSC; i++) {
2479                         u8 *pn = seq.ccmp.pn;
2480
2481                         ieee80211_get_key_rx_seq(key, i, &seq);
2482                         aes_sc->pn = cpu_to_le64(
2483                                         (u64)pn[5] |
2484                                         ((u64)pn[4] << 8) |
2485                                         ((u64)pn[3] << 16) |
2486                                         ((u64)pn[2] << 24) |
2487                                         ((u64)pn[1] << 32) |
2488                                         ((u64)pn[0] << 40));
2489                 }
2490                 data->use_rsc_tsc = true;
2491                 break;
2492         }
2493
2494         mutex_unlock(&priv->mutex);
2495 }
2496
2497 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
2498                               struct cfg80211_wowlan *wowlan)
2499 {
2500         struct iwl_priv *priv = hw->priv;
2501         struct iwlagn_wowlan_wakeup_filter_cmd wakeup_filter_cmd;
2502         struct iwl_rxon_cmd rxon;
2503         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2504         struct iwlagn_wowlan_kek_kck_material_cmd kek_kck_cmd;
2505         struct iwlagn_wowlan_tkip_params_cmd tkip_cmd = {};
2506         struct wowlan_key_data key_data = {
2507                 .ctx = ctx,
2508                 .bssid = ctx->active.bssid_addr,
2509                 .use_rsc_tsc = false,
2510                 .tkip = &tkip_cmd,
2511                 .use_tkip = false,
2512         };
2513         int ret, i;
2514         u16 seq;
2515
2516         if (WARN_ON(!wowlan))
2517                 return -EINVAL;
2518
2519         mutex_lock(&priv->mutex);
2520
2521         /* Don't attempt WoWLAN when not associated, tear down instead. */
2522         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
2523             !iwl_is_associated_ctx(ctx)) {
2524                 ret = 1;
2525                 goto out;
2526         }
2527
2528         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
2529         if (!key_data.rsc_tsc) {
2530                 ret = -ENOMEM;
2531                 goto out;
2532         }
2533
2534         memset(&wakeup_filter_cmd, 0, sizeof(wakeup_filter_cmd));
2535
2536         /*
2537          * We know the last used seqno, and the uCode expects to know that
2538          * one, it will increment before TX.
2539          */
2540         seq = le16_to_cpu(priv->last_seq_ctl) & IEEE80211_SCTL_SEQ;
2541         wakeup_filter_cmd.non_qos_seq = cpu_to_le16(seq);
2542
2543         /*
2544          * For QoS counters, we store the one to use next, so subtract 0x10
2545          * since the uCode will add 0x10 before using the value.
2546          */
2547         for (i = 0; i < 8; i++) {
2548                 seq = priv->stations[IWL_AP_ID].tid[i].seq_number;
2549                 seq -= 0x10;
2550                 wakeup_filter_cmd.qos_seq[i] = cpu_to_le16(seq);
2551         }
2552
2553         if (wowlan->disconnect)
2554                 wakeup_filter_cmd.enabled |=
2555                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
2556                                     IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE);
2557         if (wowlan->magic_pkt)
2558                 wakeup_filter_cmd.enabled |=
2559                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET);
2560         if (wowlan->gtk_rekey_failure)
2561                 wakeup_filter_cmd.enabled |=
2562                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
2563         if (wowlan->eap_identity_req)
2564                 wakeup_filter_cmd.enabled |=
2565                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ);
2566         if (wowlan->four_way_handshake)
2567                 wakeup_filter_cmd.enabled |=
2568                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
2569         if (wowlan->rfkill_release)
2570                 wakeup_filter_cmd.enabled |=
2571                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_RFKILL);
2572         if (wowlan->n_patterns)
2573                 wakeup_filter_cmd.enabled |=
2574                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH);
2575
2576         iwl_scan_cancel_timeout(priv, 200);
2577
2578         memcpy(&rxon, &ctx->active, sizeof(rxon));
2579
2580         trans_stop_device(&priv->trans);
2581
2582         priv->wowlan = true;
2583
2584         ret = iwlagn_load_ucode_wait_alive(priv, &priv->ucode_wowlan,
2585                                            IWL_UCODE_WOWLAN);
2586         if (ret)
2587                 goto error;
2588
2589         /* now configure WoWLAN ucode */
2590         ret = iwl_alive_start(priv);
2591         if (ret)
2592                 goto error;
2593
2594         memcpy(&ctx->staging, &rxon, sizeof(rxon));
2595         ret = iwlagn_commit_rxon(priv, ctx);
2596         if (ret)
2597                 goto error;
2598
2599         ret = iwl_power_update_mode(priv, true);
2600         if (ret)
2601                 goto error;
2602
2603         if (!iwlagn_mod_params.sw_crypto) {
2604                 /* mark all keys clear */
2605                 priv->ucode_key_table = 0;
2606                 ctx->key_mapping_keys = 0;
2607
2608                 /*
2609                  * This needs to be unlocked due to lock ordering
2610                  * constraints. Since we're in the suspend path
2611                  * that isn't really a problem though.
2612                  */
2613                 mutex_unlock(&priv->mutex);
2614                 ieee80211_iter_keys(priv->hw, ctx->vif,
2615                                     iwlagn_wowlan_program_keys,
2616                                     &key_data);
2617                 mutex_lock(&priv->mutex);
2618                 if (key_data.error) {
2619                         ret = -EIO;
2620                         goto error;
2621                 }
2622
2623                 if (key_data.use_rsc_tsc) {
2624                         struct iwl_host_cmd rsc_tsc_cmd = {
2625                                 .id = REPLY_WOWLAN_TSC_RSC_PARAMS,
2626                                 .flags = CMD_SYNC,
2627                                 .data[0] = key_data.rsc_tsc,
2628                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
2629                                 .len[0] = sizeof(*key_data.rsc_tsc),
2630                         };
2631
2632                         ret = trans_send_cmd(&priv->trans, &rsc_tsc_cmd);
2633                         if (ret)
2634                                 goto error;
2635                 }
2636
2637                 if (key_data.use_tkip) {
2638                         ret = trans_send_cmd_pdu(&priv->trans,
2639                                                  REPLY_WOWLAN_TKIP_PARAMS,
2640                                                  CMD_SYNC, sizeof(tkip_cmd),
2641                                                  &tkip_cmd);
2642                         if (ret)
2643                                 goto error;
2644                 }
2645
2646                 if (priv->have_rekey_data) {
2647                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
2648                         memcpy(kek_kck_cmd.kck, priv->kck, NL80211_KCK_LEN);
2649                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
2650                         memcpy(kek_kck_cmd.kek, priv->kek, NL80211_KEK_LEN);
2651                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
2652                         kek_kck_cmd.replay_ctr = priv->replay_ctr;
2653
2654                         ret = trans_send_cmd_pdu(&priv->trans,
2655                                                  REPLY_WOWLAN_KEK_KCK_MATERIAL,
2656                                                  CMD_SYNC, sizeof(kek_kck_cmd),
2657                                                  &kek_kck_cmd);
2658                         if (ret)
2659                                 goto error;
2660                 }
2661         }
2662
2663         ret = trans_send_cmd_pdu(&priv->trans, REPLY_WOWLAN_WAKEUP_FILTER,
2664                                  CMD_SYNC, sizeof(wakeup_filter_cmd),
2665                                  &wakeup_filter_cmd);
2666         if (ret)
2667                 goto error;
2668
2669         ret = iwlagn_send_patterns(priv, wowlan);
2670         if (ret)
2671                 goto error;
2672
2673         device_set_wakeup_enable(priv->bus->dev, true);
2674
2675         /* Now let the ucode operate on its own */
2676         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2677                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
2678
2679         goto out;
2680
2681  error:
2682         priv->wowlan = false;
2683         iwlagn_prepare_restart(priv);
2684         ieee80211_restart_hw(priv->hw);
2685  out:
2686         mutex_unlock(&priv->mutex);
2687         kfree(key_data.rsc_tsc);
2688         return ret;
2689 }
2690
2691 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
2692 {
2693         struct iwl_priv *priv = hw->priv;
2694         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2695         struct ieee80211_vif *vif;
2696         unsigned long flags;
2697         u32 base, status = 0xffffffff;
2698         int ret = -EIO;
2699
2700         mutex_lock(&priv->mutex);
2701
2702         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2703                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
2704
2705         base = priv->device_pointers.error_event_table;
2706         if (iwlagn_hw_valid_rtc_data_addr(base)) {
2707                 spin_lock_irqsave(&priv->reg_lock, flags);
2708                 ret = iwl_grab_nic_access_silent(priv);
2709                 if (ret == 0) {
2710                         iwl_write32(priv, HBUS_TARG_MEM_RADDR, base);
2711                         status = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
2712                         iwl_release_nic_access(priv);
2713                 }
2714                 spin_unlock_irqrestore(&priv->reg_lock, flags);
2715
2716 #ifdef CONFIG_IWLWIFI_DEBUGFS
2717                 if (ret == 0) {
2718                         if (!priv->wowlan_sram)
2719                                 priv->wowlan_sram =
2720                                         kzalloc(priv->ucode_wowlan.data.len,
2721                                                 GFP_KERNEL);
2722
2723                         if (priv->wowlan_sram)
2724                                 _iwl_read_targ_mem_words(
2725                                         priv, 0x800000, priv->wowlan_sram,
2726                                         priv->ucode_wowlan.data.len / 4);
2727                 }
2728 #endif
2729         }
2730
2731         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
2732         vif = ctx->vif;
2733
2734         priv->wowlan = false;
2735
2736         device_set_wakeup_enable(priv->bus->dev, false);
2737
2738         iwlagn_prepare_restart(priv);
2739
2740         memset((void *)&ctx->active, 0, sizeof(ctx->active));
2741         iwl_connection_init_rx_config(priv, ctx);
2742         iwlagn_set_rxon_chain(priv, ctx);
2743
2744         mutex_unlock(&priv->mutex);
2745
2746         ieee80211_resume_disconnect(vif);
2747
2748         return 1;
2749 }
2750 #endif
2751
2752 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2753 {
2754         struct iwl_priv *priv = hw->priv;
2755
2756         IWL_DEBUG_MACDUMP(priv, "enter\n");
2757
2758         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2759                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2760
2761         if (iwlagn_tx_skb(priv, skb))
2762                 dev_kfree_skb_any(skb);
2763
2764         IWL_DEBUG_MACDUMP(priv, "leave\n");
2765 }
2766
2767 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2768                                        struct ieee80211_vif *vif,
2769                                        struct ieee80211_key_conf *keyconf,
2770                                        struct ieee80211_sta *sta,
2771                                        u32 iv32, u16 *phase1key)
2772 {
2773         struct iwl_priv *priv = hw->priv;
2774
2775         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
2776 }
2777
2778 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2779                               struct ieee80211_vif *vif,
2780                               struct ieee80211_sta *sta,
2781                               struct ieee80211_key_conf *key)
2782 {
2783         struct iwl_priv *priv = hw->priv;
2784         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2785         struct iwl_rxon_context *ctx = vif_priv->ctx;
2786         int ret;
2787         bool is_default_wep_key = false;
2788
2789         IWL_DEBUG_MAC80211(priv, "enter\n");
2790
2791         if (iwlagn_mod_params.sw_crypto) {
2792                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2793                 return -EOPNOTSUPP;
2794         }
2795
2796         /*
2797          * We could program these keys into the hardware as well, but we
2798          * don't expect much multicast traffic in IBSS and having keys
2799          * for more stations is probably more useful.
2800          *
2801          * Mark key TX-only and return 0.
2802          */
2803         if (vif->type == NL80211_IFTYPE_ADHOC &&
2804             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
2805                 key->hw_key_idx = WEP_INVALID_OFFSET;
2806                 return 0;
2807         }
2808
2809         /* If they key was TX-only, accept deletion */
2810         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
2811                 return 0;
2812
2813         mutex_lock(&priv->mutex);
2814         iwl_scan_cancel_timeout(priv, 100);
2815
2816         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
2817
2818         /*
2819          * If we are getting WEP group key and we didn't receive any key mapping
2820          * so far, we are in legacy wep mode (group key only), otherwise we are
2821          * in 1X mode.
2822          * In legacy wep mode, we use another host command to the uCode.
2823          */
2824         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2825              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
2826                 if (cmd == SET_KEY)
2827                         is_default_wep_key = !ctx->key_mapping_keys;
2828                 else
2829                         is_default_wep_key =
2830                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
2831         }
2832
2833
2834         switch (cmd) {
2835         case SET_KEY:
2836                 if (is_default_wep_key) {
2837                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2838                         break;
2839                 }
2840                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
2841                 if (ret) {
2842                         /*
2843                          * can't add key for RX, but we don't need it
2844                          * in the device for TX so still return 0
2845                          */
2846                         ret = 0;
2847                         key->hw_key_idx = WEP_INVALID_OFFSET;
2848                 }
2849
2850                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2851                 break;
2852         case DISABLE_KEY:
2853                 if (is_default_wep_key)
2854                         ret = iwl_remove_default_wep_key(priv, ctx, key);
2855                 else
2856                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
2857
2858                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2859                 break;
2860         default:
2861                 ret = -EINVAL;
2862         }
2863
2864         mutex_unlock(&priv->mutex);
2865         IWL_DEBUG_MAC80211(priv, "leave\n");
2866
2867         return ret;
2868 }
2869
2870 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2871                                    struct ieee80211_vif *vif,
2872                                    enum ieee80211_ampdu_mlme_action action,
2873                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2874                                    u8 buf_size)
2875 {
2876         struct iwl_priv *priv = hw->priv;
2877         int ret = -EINVAL;
2878         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2879
2880         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2881                      sta->addr, tid);
2882
2883         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2884                 return -EACCES;
2885
2886         mutex_lock(&priv->mutex);
2887
2888         switch (action) {
2889         case IEEE80211_AMPDU_RX_START:
2890                 IWL_DEBUG_HT(priv, "start Rx\n");
2891                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2892                 break;
2893         case IEEE80211_AMPDU_RX_STOP:
2894                 IWL_DEBUG_HT(priv, "stop Rx\n");
2895                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2896                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2897                         ret = 0;
2898                 break;
2899         case IEEE80211_AMPDU_TX_START:
2900                 IWL_DEBUG_HT(priv, "start Tx\n");
2901                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2902                 if (ret == 0) {
2903                         priv->agg_tids_count++;
2904                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
2905                                      priv->agg_tids_count);
2906                 }
2907                 break;
2908         case IEEE80211_AMPDU_TX_STOP:
2909                 IWL_DEBUG_HT(priv, "stop Tx\n");
2910                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2911                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
2912                         priv->agg_tids_count--;
2913                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
2914                                      priv->agg_tids_count);
2915                 }
2916                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2917                         ret = 0;
2918                 if (priv->cfg->ht_params &&
2919                     priv->cfg->ht_params->use_rts_for_aggregation) {
2920                         /*
2921                          * switch off RTS/CTS if it was previously enabled
2922                          */
2923                         sta_priv->lq_sta.lq.general_params.flags &=
2924                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2925                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2926                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2927                 }
2928                 break;
2929         case IEEE80211_AMPDU_TX_OPERATIONAL:
2930                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2931
2932                 trans_txq_agg_setup(&priv->trans, iwl_sta_id(sta), tid,
2933                                 buf_size);
2934
2935                 /*
2936                  * If the limit is 0, then it wasn't initialised yet,
2937                  * use the default. We can do that since we take the
2938                  * minimum below, and we don't want to go above our
2939                  * default due to hardware restrictions.
2940                  */
2941                 if (sta_priv->max_agg_bufsize == 0)
2942                         sta_priv->max_agg_bufsize =
2943                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2944
2945                 /*
2946                  * Even though in theory the peer could have different
2947                  * aggregation reorder buffer sizes for different sessions,
2948                  * our ucode doesn't allow for that and has a global limit
2949                  * for each station. Therefore, use the minimum of all the
2950                  * aggregation sessions and our default value.
2951                  */
2952                 sta_priv->max_agg_bufsize =
2953                         min(sta_priv->max_agg_bufsize, buf_size);
2954
2955                 if (priv->cfg->ht_params &&
2956                     priv->cfg->ht_params->use_rts_for_aggregation) {
2957                         /*
2958                          * switch to RTS/CTS if it is the prefer protection
2959                          * method for HT traffic
2960                          */
2961
2962                         sta_priv->lq_sta.lq.general_params.flags |=
2963                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2964                 }
2965
2966                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2967                         sta_priv->max_agg_bufsize;
2968
2969                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2970                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2971
2972                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2973                          sta->addr, tid);
2974                 ret = 0;
2975                 break;
2976         }
2977         mutex_unlock(&priv->mutex);
2978
2979         return ret;
2980 }
2981
2982 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2983                               struct ieee80211_vif *vif,
2984                               struct ieee80211_sta *sta)
2985 {
2986         struct iwl_priv *priv = hw->priv;
2987         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2988         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2989         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2990         int ret;
2991         u8 sta_id;
2992
2993         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2994                         sta->addr);
2995         mutex_lock(&priv->mutex);
2996         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2997                         sta->addr);
2998         sta_priv->common.sta_id = IWL_INVALID_STATION;
2999
3000         atomic_set(&sta_priv->pending_frames, 0);
3001         if (vif->type == NL80211_IFTYPE_AP)
3002                 sta_priv->client = true;
3003
3004         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
3005                                      is_ap, sta, &sta_id);
3006         if (ret) {
3007                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3008                         sta->addr, ret);
3009                 /* Should we return success if return code is EEXIST ? */
3010                 mutex_unlock(&priv->mutex);
3011                 return ret;
3012         }
3013
3014         sta_priv->common.sta_id = sta_id;
3015
3016         /* Initialize rate scaling */
3017         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3018                        sta->addr);
3019         iwl_rs_rate_init(priv, sta, sta_id);
3020         mutex_unlock(&priv->mutex);
3021
3022         return 0;
3023 }
3024
3025 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
3026                                 struct ieee80211_channel_switch *ch_switch)
3027 {
3028         struct iwl_priv *priv = hw->priv;
3029         const struct iwl_channel_info *ch_info;
3030         struct ieee80211_conf *conf = &hw->conf;
3031         struct ieee80211_channel *channel = ch_switch->channel;
3032         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
3033         /*
3034          * MULTI-FIXME
3035          * When we add support for multiple interfaces, we need to
3036          * revisit this. The channel switch command in the device
3037          * only affects the BSS context, but what does that really
3038          * mean? And what if we get a CSA on the second interface?
3039          * This needs a lot of work.
3040          */
3041         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3042         u16 ch;
3043
3044         IWL_DEBUG_MAC80211(priv, "enter\n");
3045
3046         mutex_lock(&priv->mutex);
3047
3048         if (iwl_is_rfkill(priv))
3049                 goto out;
3050
3051         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
3052             test_bit(STATUS_SCANNING, &priv->status) ||
3053             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
3054                 goto out;
3055
3056         if (!iwl_is_associated_ctx(ctx))
3057                 goto out;
3058
3059         if (!priv->cfg->lib->set_channel_switch)
3060                 goto out;
3061
3062         ch = channel->hw_value;
3063         if (le16_to_cpu(ctx->active.channel) == ch)
3064                 goto out;
3065
3066         ch_info = iwl_get_channel_info(priv, channel->band, ch);
3067         if (!is_channel_valid(ch_info)) {
3068                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
3069                 goto out;
3070         }
3071
3072         spin_lock_irq(&priv->lock);
3073
3074         priv->current_ht_config.smps = conf->smps_mode;
3075
3076         /* Configure HT40 channels */
3077         ctx->ht.enabled = conf_is_ht(conf);
3078         if (ctx->ht.enabled) {
3079                 if (conf_is_ht40_minus(conf)) {
3080                         ctx->ht.extension_chan_offset =
3081                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3082                         ctx->ht.is_40mhz = true;
3083                 } else if (conf_is_ht40_plus(conf)) {
3084                         ctx->ht.extension_chan_offset =
3085                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3086                         ctx->ht.is_40mhz = true;
3087                 } else {
3088                         ctx->ht.extension_chan_offset =
3089                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
3090                         ctx->ht.is_40mhz = false;
3091                 }
3092         } else
3093                 ctx->ht.is_40mhz = false;
3094
3095         if ((le16_to_cpu(ctx->staging.channel) != ch))
3096                 ctx->staging.flags = 0;
3097
3098         iwl_set_rxon_channel(priv, channel, ctx);
3099         iwl_set_rxon_ht(priv, ht_conf);
3100         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
3101
3102         spin_unlock_irq(&priv->lock);
3103
3104         iwl_set_rate(priv);
3105         /*
3106          * at this point, staging_rxon has the
3107          * configuration for channel switch
3108          */
3109         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
3110         priv->switch_channel = cpu_to_le16(ch);
3111         if (priv->cfg->lib->set_channel_switch(priv, ch_switch)) {
3112                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
3113                 priv->switch_channel = 0;
3114                 ieee80211_chswitch_done(ctx->vif, false);
3115         }
3116
3117 out:
3118         mutex_unlock(&priv->mutex);
3119         IWL_DEBUG_MAC80211(priv, "leave\n");
3120 }
3121
3122 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
3123                                     unsigned int changed_flags,
3124                                     unsigned int *total_flags,
3125                                     u64 multicast)
3126 {
3127         struct iwl_priv *priv = hw->priv;
3128         __le32 filter_or = 0, filter_nand = 0;
3129         struct iwl_rxon_context *ctx;
3130
3131 #define CHK(test, flag) do { \
3132         if (*total_flags & (test))              \
3133                 filter_or |= (flag);            \
3134         else                                    \
3135                 filter_nand |= (flag);          \
3136         } while (0)
3137
3138         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3139                         changed_flags, *total_flags);
3140
3141         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3142         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3143         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3144         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3145
3146 #undef CHK
3147
3148         mutex_lock(&priv->mutex);
3149
3150         for_each_context(priv, ctx) {
3151                 ctx->staging.filter_flags &= ~filter_nand;
3152                 ctx->staging.filter_flags |= filter_or;
3153
3154                 /*
3155                  * Not committing directly because hardware can perform a scan,
3156                  * but we'll eventually commit the filter flags change anyway.
3157                  */
3158         }
3159
3160         mutex_unlock(&priv->mutex);
3161
3162         /*
3163          * Receiving all multicast frames is always enabled by the
3164          * default flags setup in iwl_connection_init_rx_config()
3165          * since we currently do not support programming multicast
3166          * filters into the device.
3167          */
3168         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3169                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3170 }
3171
3172 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3173 {
3174         struct iwl_priv *priv = hw->priv;
3175
3176         mutex_lock(&priv->mutex);
3177         IWL_DEBUG_MAC80211(priv, "enter\n");
3178
3179         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3180                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3181                 goto done;
3182         }
3183         if (iwl_is_rfkill(priv)) {
3184                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3185                 goto done;
3186         }
3187
3188         /*
3189          * mac80211 will not push any more frames for transmit
3190          * until the flush is completed
3191          */
3192         if (drop) {
3193                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3194                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3195                         IWL_ERR(priv, "flush request fail\n");
3196                         goto done;
3197                 }
3198         }
3199         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3200         iwlagn_wait_tx_queue_empty(priv);
3201 done:
3202         mutex_unlock(&priv->mutex);
3203         IWL_DEBUG_MAC80211(priv, "leave\n");
3204 }
3205
3206 static void iwlagn_disable_roc(struct iwl_priv *priv)
3207 {
3208         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3209         struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3210
3211         lockdep_assert_held(&priv->mutex);
3212
3213         if (!ctx->is_active)
3214                 return;
3215
3216         ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3217         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3218         iwl_set_rxon_channel(priv, chan, ctx);
3219         iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3220
3221         priv->hw_roc_channel = NULL;
3222
3223         iwlagn_commit_rxon(priv, ctx);
3224
3225         ctx->is_active = false;
3226 }
3227
3228 static void iwlagn_bg_roc_done(struct work_struct *work)
3229 {
3230         struct iwl_priv *priv = container_of(work, struct iwl_priv,
3231                                              hw_roc_work.work);
3232
3233         mutex_lock(&priv->mutex);
3234         ieee80211_remain_on_channel_expired(priv->hw);
3235         iwlagn_disable_roc(priv);
3236         mutex_unlock(&priv->mutex);
3237 }
3238
3239 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3240                                      struct ieee80211_channel *channel,
3241                                      enum nl80211_channel_type channel_type,
3242                                      int duration)
3243 {
3244         struct iwl_priv *priv = hw->priv;
3245         int err = 0;
3246
3247         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3248                 return -EOPNOTSUPP;
3249
3250         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3251                                         BIT(NL80211_IFTYPE_P2P_CLIENT)))
3252                 return -EOPNOTSUPP;
3253
3254         mutex_lock(&priv->mutex);
3255
3256         if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3257             test_bit(STATUS_SCAN_HW, &priv->status)) {
3258                 err = -EBUSY;
3259                 goto out;
3260         }
3261
3262         priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3263         priv->hw_roc_channel = channel;
3264         priv->hw_roc_chantype = channel_type;
3265         priv->hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3266         iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3267         queue_delayed_work(priv->workqueue, &priv->hw_roc_work,
3268                            msecs_to_jiffies(duration + 20));
3269
3270         msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3271         ieee80211_ready_on_channel(priv->hw);
3272
3273  out:
3274         mutex_unlock(&priv->mutex);
3275
3276         return err;
3277 }
3278
3279 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3280 {
3281         struct iwl_priv *priv = hw->priv;
3282
3283         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3284                 return -EOPNOTSUPP;
3285
3286         cancel_delayed_work_sync(&priv->hw_roc_work);
3287
3288         mutex_lock(&priv->mutex);
3289         iwlagn_disable_roc(priv);
3290         mutex_unlock(&priv->mutex);
3291
3292         return 0;
3293 }
3294
3295 /*****************************************************************************
3296  *
3297  * driver setup and teardown
3298  *
3299  *****************************************************************************/
3300
3301 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3302 {
3303         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3304
3305         init_waitqueue_head(&priv->wait_command_queue);
3306
3307         INIT_WORK(&priv->restart, iwl_bg_restart);
3308         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3309         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3310         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3311         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3312         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3313         INIT_DELAYED_WORK(&priv->hw_roc_work, iwlagn_bg_roc_done);
3314
3315         iwl_setup_scan_deferred_work(priv);
3316
3317         if (priv->cfg->lib->bt_setup_deferred_work)
3318                 priv->cfg->lib->bt_setup_deferred_work(priv);
3319
3320         init_timer(&priv->statistics_periodic);
3321         priv->statistics_periodic.data = (unsigned long)priv;
3322         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3323
3324         init_timer(&priv->ucode_trace);
3325         priv->ucode_trace.data = (unsigned long)priv;
3326         priv->ucode_trace.function = iwl_bg_ucode_trace;
3327
3328         init_timer(&priv->watchdog);
3329         priv->watchdog.data = (unsigned long)priv;
3330         priv->watchdog.function = iwl_bg_watchdog;
3331 }
3332
3333 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3334 {
3335         if (priv->cfg->lib->cancel_deferred_work)
3336                 priv->cfg->lib->cancel_deferred_work(priv);
3337
3338         cancel_work_sync(&priv->run_time_calib_work);
3339         cancel_work_sync(&priv->beacon_update);
3340
3341         iwl_cancel_scan_deferred_work(priv);
3342
3343         cancel_work_sync(&priv->bt_full_concurrency);
3344         cancel_work_sync(&priv->bt_runtime_config);
3345
3346         del_timer_sync(&priv->statistics_periodic);
3347         del_timer_sync(&priv->ucode_trace);
3348 }
3349
3350 static void iwl_init_hw_rates(struct iwl_priv *priv,
3351                               struct ieee80211_rate *rates)
3352 {
3353         int i;
3354
3355         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3356                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3357                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3358                 rates[i].hw_value_short = i;
3359                 rates[i].flags = 0;
3360                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3361                         /*
3362                          * If CCK != 1M then set short preamble rate flag.
3363                          */
3364                         rates[i].flags |=
3365                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3366                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3367                 }
3368         }
3369 }
3370
3371 static int iwl_init_drv(struct iwl_priv *priv)
3372 {
3373         int ret;
3374
3375         spin_lock_init(&priv->sta_lock);
3376         spin_lock_init(&priv->hcmd_lock);
3377
3378         mutex_init(&priv->mutex);
3379
3380         priv->ieee_channels = NULL;
3381         priv->ieee_rates = NULL;
3382         priv->band = IEEE80211_BAND_2GHZ;
3383
3384         priv->iw_mode = NL80211_IFTYPE_STATION;
3385         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3386         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3387         priv->agg_tids_count = 0;
3388
3389         /* initialize force reset */
3390         priv->force_reset[IWL_RF_RESET].reset_duration =
3391                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3392         priv->force_reset[IWL_FW_RESET].reset_duration =
3393                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3394
3395         priv->rx_statistics_jiffies = jiffies;
3396
3397         /* Choose which receivers/antennas to use */
3398         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
3399
3400         iwl_init_scan_params(priv);
3401
3402         /* init bt coex */
3403         if (priv->cfg->bt_params &&
3404             priv->cfg->bt_params->advanced_bt_coexist) {
3405                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3406                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3407                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3408                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3409                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3410                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3411         }
3412
3413         ret = iwl_init_channel_map(priv);
3414         if (ret) {
3415                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3416                 goto err;
3417         }
3418
3419         ret = iwlcore_init_geos(priv);
3420         if (ret) {
3421                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3422                 goto err_free_channel_map;
3423         }
3424         iwl_init_hw_rates(priv, priv->ieee_rates);
3425
3426         return 0;
3427
3428 err_free_channel_map:
3429         iwl_free_channel_map(priv);
3430 err:
3431         return ret;
3432 }
3433
3434 static void iwl_uninit_drv(struct iwl_priv *priv)
3435 {
3436         iwl_calib_free_results(priv);
3437         iwlcore_free_geos(priv);
3438         iwl_free_channel_map(priv);
3439         kfree(priv->scan_cmd);
3440         kfree(priv->beacon_cmd);
3441 #ifdef CONFIG_IWLWIFI_DEBUGFS
3442         kfree(priv->wowlan_sram);
3443 #endif
3444 }
3445
3446 static void iwl_mac_rssi_callback(struct ieee80211_hw *hw,
3447                            enum ieee80211_rssi_event rssi_event)
3448 {
3449         struct iwl_priv *priv = hw->priv;
3450
3451         mutex_lock(&priv->mutex);
3452
3453         if (priv->cfg->bt_params &&
3454                         priv->cfg->bt_params->advanced_bt_coexist) {
3455                 if (rssi_event == RSSI_EVENT_LOW)
3456                         priv->bt_enable_pspoll = true;
3457                 else if (rssi_event == RSSI_EVENT_HIGH)
3458                         priv->bt_enable_pspoll = false;
3459
3460                 iwlagn_send_advance_bt_config(priv);
3461         } else {
3462                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
3463                                 "ignoring RSSI callback\n");
3464         }
3465
3466         mutex_unlock(&priv->mutex);
3467 }
3468
3469 struct ieee80211_ops iwlagn_hw_ops = {
3470         .tx = iwlagn_mac_tx,
3471         .start = iwlagn_mac_start,
3472         .stop = iwlagn_mac_stop,
3473 #ifdef CONFIG_PM
3474         .suspend = iwlagn_mac_suspend,
3475         .resume = iwlagn_mac_resume,
3476 #endif
3477         .add_interface = iwl_mac_add_interface,
3478         .remove_interface = iwl_mac_remove_interface,
3479         .change_interface = iwl_mac_change_interface,
3480         .config = iwlagn_mac_config,
3481         .configure_filter = iwlagn_configure_filter,
3482         .set_key = iwlagn_mac_set_key,
3483         .update_tkip_key = iwlagn_mac_update_tkip_key,
3484         .set_rekey_data = iwlagn_mac_set_rekey_data,
3485         .conf_tx = iwl_mac_conf_tx,
3486         .bss_info_changed = iwlagn_bss_info_changed,
3487         .ampdu_action = iwlagn_mac_ampdu_action,
3488         .hw_scan = iwl_mac_hw_scan,
3489         .sta_notify = iwlagn_mac_sta_notify,
3490         .sta_add = iwlagn_mac_sta_add,
3491         .sta_remove = iwl_mac_sta_remove,
3492         .channel_switch = iwlagn_mac_channel_switch,
3493         .flush = iwlagn_mac_flush,
3494         .tx_last_beacon = iwl_mac_tx_last_beacon,
3495         .remain_on_channel = iwl_mac_remain_on_channel,
3496         .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3497         .offchannel_tx = iwl_mac_offchannel_tx,
3498         .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3499         .rssi_callback = iwl_mac_rssi_callback,
3500         CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3501         CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3502 };
3503
3504 static u32 iwl_hw_detect(struct iwl_priv *priv)
3505 {
3506         return iwl_read32(priv, CSR_HW_REV);
3507 }
3508
3509 static int iwl_set_hw_params(struct iwl_priv *priv)
3510 {
3511         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3512         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3513         if (iwlagn_mod_params.amsdu_size_8K)
3514                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3515         else
3516                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3517
3518         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3519
3520         if (iwlagn_mod_params.disable_11n)
3521                 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3522
3523         /* Device-specific setup */
3524         return priv->cfg->lib->set_hw_params(priv);
3525 }
3526
3527 static const u8 iwlagn_bss_ac_to_fifo[] = {
3528         IWL_TX_FIFO_VO,
3529         IWL_TX_FIFO_VI,
3530         IWL_TX_FIFO_BE,
3531         IWL_TX_FIFO_BK,
3532 };
3533
3534 static const u8 iwlagn_bss_ac_to_queue[] = {
3535         0, 1, 2, 3,
3536 };
3537
3538 static const u8 iwlagn_pan_ac_to_fifo[] = {
3539         IWL_TX_FIFO_VO_IPAN,
3540         IWL_TX_FIFO_VI_IPAN,
3541         IWL_TX_FIFO_BE_IPAN,
3542         IWL_TX_FIFO_BK_IPAN,
3543 };
3544
3545 static const u8 iwlagn_pan_ac_to_queue[] = {
3546         7, 6, 5, 4,
3547 };
3548
3549 /* This function both allocates and initializes hw and priv. */
3550 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3551 {
3552         struct iwl_priv *priv;
3553         /* mac80211 allocates memory for this device instance, including
3554          *   space for this driver's private structure */
3555         struct ieee80211_hw *hw;
3556
3557         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3558         if (hw == NULL) {
3559                 pr_err("%s: Can not allocate network device\n",
3560                        cfg->name);
3561                 goto out;
3562         }
3563
3564         priv = hw->priv;
3565         priv->hw = hw;
3566
3567 out:
3568         return hw;
3569 }
3570
3571 static void iwl_init_context(struct iwl_priv *priv)
3572 {
3573         int i;
3574
3575         /*
3576          * The default context is always valid,
3577          * more may be discovered when firmware
3578          * is loaded.
3579          */
3580         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3581
3582         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3583                 priv->contexts[i].ctxid = i;
3584
3585         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3586         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3587         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3588         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3589         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3590         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3591         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3592         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3593         priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3594         priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3595         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3596                 BIT(NL80211_IFTYPE_ADHOC);
3597         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3598                 BIT(NL80211_IFTYPE_STATION);
3599         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3600         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3601         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3602         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3603
3604         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3605         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3606                 REPLY_WIPAN_RXON_TIMING;
3607         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3608                 REPLY_WIPAN_RXON_ASSOC;
3609         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3610         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3611         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3612         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3613         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3614         priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3615         priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3616         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3617         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3618                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3619 #ifdef CONFIG_IWL_P2P
3620         priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3621                 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3622 #endif
3623         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3624         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3625         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3626
3627         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3628 }
3629
3630 int iwl_probe(struct iwl_bus *bus, struct iwl_cfg *cfg)
3631 {
3632         int err = 0;
3633         struct iwl_priv *priv;
3634         struct ieee80211_hw *hw;
3635         u16 num_mac;
3636         u32 hw_rev;
3637
3638         /************************
3639          * 1. Allocating HW data
3640          ************************/
3641         hw = iwl_alloc_all(cfg);
3642         if (!hw) {
3643                 err = -ENOMEM;
3644                 goto out;
3645         }
3646
3647         priv = hw->priv;
3648         priv->bus = bus;
3649         bus_set_drv_data(priv->bus, priv);
3650
3651         /* At this point both hw and priv are allocated. */
3652
3653         SET_IEEE80211_DEV(hw, priv->bus->dev);
3654
3655         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3656         priv->cfg = cfg;
3657         priv->inta_mask = CSR_INI_SET_MASK;
3658
3659         /* is antenna coupling more than 35dB ? */
3660         priv->bt_ant_couple_ok =
3661                 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3662                 true : false;
3663
3664         /* enable/disable bt channel inhibition */
3665         priv->bt_ch_announce = iwlagn_bt_ch_announce;
3666         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3667                        (priv->bt_ch_announce) ? "On" : "Off");
3668
3669         if (iwl_alloc_traffic_mem(priv))
3670                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3671
3672         /* these spin locks will be used in apm_ops.init and EEPROM access
3673          * we should init now
3674          */
3675         spin_lock_init(&priv->reg_lock);
3676         spin_lock_init(&priv->lock);
3677
3678         /*
3679          * stop and reset the on-board processor just in case it is in a
3680          * strange state ... like being left stranded by a primary kernel
3681          * and this is now the kdump kernel trying to start up
3682          */
3683         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3684
3685         /***********************
3686          * 3. Read REV register
3687          ***********************/
3688         hw_rev = iwl_hw_detect(priv);
3689         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3690                 priv->cfg->name, hw_rev);
3691
3692         err = iwl_trans_register(&priv->trans, priv);
3693         if (err)
3694                 goto out_free_traffic_mem;
3695
3696         if (trans_prepare_card_hw(&priv->trans)) {
3697                 err = -EIO;
3698                 IWL_WARN(priv, "Failed, HW not ready\n");
3699                 goto out_free_trans;
3700         }
3701
3702         /*****************
3703          * 4. Read EEPROM
3704          *****************/
3705         /* Read the EEPROM */
3706         err = iwl_eeprom_init(priv, hw_rev);
3707         if (err) {
3708                 IWL_ERR(priv, "Unable to init EEPROM\n");
3709                 goto out_free_trans;
3710         }
3711         err = iwl_eeprom_check_version(priv);
3712         if (err)
3713                 goto out_free_eeprom;
3714
3715         err = iwl_eeprom_check_sku(priv);
3716         if (err)
3717                 goto out_free_eeprom;
3718
3719         /* extract MAC Address */
3720         iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3721         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3722         priv->hw->wiphy->addresses = priv->addresses;
3723         priv->hw->wiphy->n_addresses = 1;
3724         num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3725         if (num_mac > 1) {
3726                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3727                        ETH_ALEN);
3728                 priv->addresses[1].addr[5]++;
3729                 priv->hw->wiphy->n_addresses++;
3730         }
3731
3732         /* initialize all valid contexts */
3733         iwl_init_context(priv);
3734
3735         /************************
3736          * 5. Setup HW constants
3737          ************************/
3738         if (iwl_set_hw_params(priv)) {
3739                 err = -ENOENT;
3740                 IWL_ERR(priv, "failed to set hw parameters\n");
3741                 goto out_free_eeprom;
3742         }
3743
3744         /*******************
3745          * 6. Setup priv
3746          *******************/
3747
3748         err = iwl_init_drv(priv);
3749         if (err)
3750                 goto out_free_eeprom;
3751         /* At this point both hw and priv are initialized. */
3752
3753         /********************
3754          * 7. Setup services
3755          ********************/
3756         iwl_setup_deferred_work(priv);
3757         iwl_setup_rx_handlers(priv);
3758         iwl_testmode_init(priv);
3759
3760         /*********************************************
3761          * 8. Enable interrupts
3762          *********************************************/
3763
3764         iwl_enable_rfkill_int(priv);
3765
3766         /* If platform's RF_KILL switch is NOT set to KILL */
3767         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3768                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3769         else
3770                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3771
3772         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3773                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3774
3775         iwl_power_initialize(priv);
3776         iwl_tt_initialize(priv);
3777
3778         init_completion(&priv->firmware_loading_complete);
3779
3780         err = iwl_request_firmware(priv, true);
3781         if (err)
3782                 goto out_destroy_workqueue;
3783
3784         return 0;
3785
3786 out_destroy_workqueue:
3787         destroy_workqueue(priv->workqueue);
3788         priv->workqueue = NULL;
3789         iwl_uninit_drv(priv);
3790 out_free_eeprom:
3791         iwl_eeprom_free(priv);
3792 out_free_trans:
3793         trans_free(&priv->trans);
3794 out_free_traffic_mem:
3795         iwl_free_traffic_mem(priv);
3796         ieee80211_free_hw(priv->hw);
3797 out:
3798         return err;
3799 }
3800
3801 void __devexit iwl_remove(struct iwl_priv * priv)
3802 {
3803         unsigned long flags;
3804
3805         wait_for_completion(&priv->firmware_loading_complete);
3806
3807         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3808
3809         iwl_dbgfs_unregister(priv);
3810         sysfs_remove_group(&priv->bus->dev->kobj,
3811                            &iwl_attribute_group);
3812
3813         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3814          * to be called and iwl_down since we are removing the device
3815          * we need to set STATUS_EXIT_PENDING bit.
3816          */
3817         set_bit(STATUS_EXIT_PENDING, &priv->status);
3818
3819         iwl_testmode_cleanup(priv);
3820         iwl_leds_exit(priv);
3821
3822         if (priv->mac80211_registered) {
3823                 ieee80211_unregister_hw(priv->hw);
3824                 priv->mac80211_registered = 0;
3825         }
3826
3827         /* Reset to low power before unloading driver. */
3828         iwl_apm_stop(priv);
3829
3830         iwl_tt_exit(priv);
3831
3832         /* make sure we flush any pending irq or
3833          * tasklet for the driver
3834          */
3835         spin_lock_irqsave(&priv->lock, flags);
3836         iwl_disable_interrupts(priv);
3837         spin_unlock_irqrestore(&priv->lock, flags);
3838
3839         trans_sync_irq(&priv->trans);
3840
3841         iwl_dealloc_ucode(priv);
3842
3843         trans_rx_free(&priv->trans);
3844         trans_tx_free(&priv->trans);
3845
3846         iwl_eeprom_free(priv);
3847
3848         /*netif_stop_queue(dev); */
3849         flush_workqueue(priv->workqueue);
3850
3851         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3852          * priv->workqueue... so we can't take down the workqueue
3853          * until now... */
3854         destroy_workqueue(priv->workqueue);
3855         priv->workqueue = NULL;
3856         iwl_free_traffic_mem(priv);
3857
3858         trans_free(&priv->trans);
3859
3860         bus_set_drv_data(priv->bus, NULL);
3861
3862         iwl_uninit_drv(priv);
3863
3864         dev_kfree_skb(priv->beacon_skb);
3865
3866         ieee80211_free_hw(priv->hw);
3867 }
3868
3869
3870 /*****************************************************************************
3871  *
3872  * driver and module entry point
3873  *
3874  *****************************************************************************/
3875 static int __init iwl_init(void)
3876 {
3877
3878         int ret;
3879         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3880         pr_info(DRV_COPYRIGHT "\n");
3881
3882         ret = iwlagn_rate_control_register();
3883         if (ret) {
3884                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3885                 return ret;
3886         }
3887
3888         ret = iwl_pci_register_driver();
3889
3890         if (ret)
3891                 goto error_register;
3892         return ret;
3893
3894 error_register:
3895         iwlagn_rate_control_unregister();
3896         return ret;
3897 }
3898
3899 static void __exit iwl_exit(void)
3900 {
3901         iwl_pci_unregister_driver();
3902         iwlagn_rate_control_unregister();
3903 }
3904
3905 module_exit(iwl_exit);
3906 module_init(iwl_init);
3907
3908 #ifdef CONFIG_IWLWIFI_DEBUG
3909 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3910 MODULE_PARM_DESC(debug, "debug output mask");
3911 #endif
3912
3913 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3914 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3915 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3916 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3917 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3918 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3919 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3920                    int, S_IRUGO);
3921 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3922 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3923 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3924
3925 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3926                    S_IRUGO);
3927 MODULE_PARM_DESC(ucode_alternative,
3928                  "specify ucode alternative to use from ucode file");
3929
3930 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3931 MODULE_PARM_DESC(antenna_coupling,
3932                  "specify antenna coupling in dB (defualt: 0 dB)");
3933
3934 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3935 MODULE_PARM_DESC(bt_ch_inhibition,
3936                  "Disable BT channel inhibition (default: enable)");
3937
3938 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3939 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3940
3941 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3942 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3943
3944 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
3945 MODULE_PARM_DESC(wd_disable,
3946                 "Disable stuck queue watchdog timer (default: 0 [enabled])");
3947
3948 /*
3949  * set bt_coex_active to true, uCode will do kill/defer
3950  * every time the priority line is asserted (BT is sending signals on the
3951  * priority line in the PCIx).
3952  * set bt_coex_active to false, uCode will ignore the BT activity and
3953  * perform the normal operation
3954  *
3955  * User might experience transmit issue on some platform due to WiFi/BT
3956  * co-exist problem. The possible behaviors are:
3957  *   Able to scan and finding all the available AP
3958  *   Not able to associate with any AP
3959  * On those platforms, WiFi communication can be restored by set
3960  * "bt_coex_active" module parameter to "false"
3961  *
3962  * default: bt_coex_active = true (BT_COEX_ENABLE)
3963  */
3964 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3965                 bool, S_IRUGO);
3966 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3967
3968 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3969 MODULE_PARM_DESC(led_mode, "0=system default, "
3970                 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3971
3972 module_param_named(power_save, iwlagn_mod_params.power_save,
3973                 bool, S_IRUGO);
3974 MODULE_PARM_DESC(power_save,
3975                  "enable WiFi power management (default: disable)");
3976
3977 module_param_named(power_level, iwlagn_mod_params.power_level,
3978                 int, S_IRUGO);
3979 MODULE_PARM_DESC(power_level,
3980                  "default power save level (range from 1 - 5, default: 1)");
3981
3982 /*
3983  * For now, keep using power level 1 instead of automatically
3984  * adjusting ...
3985  */
3986 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3987                 bool, S_IRUGO);
3988 MODULE_PARM_DESC(no_sleep_autoadjust,
3989                  "don't automatically adjust sleep level "
3990                  "according to maximum network latency (default: true)");