drivers/net/wireless/iwlwifi/dvm/main.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2013 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/slab.h>
  36 #include <linux/delay.h>
  37 #include <linux/sched.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/netdevice.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-read.h"
  48 #include "iwl-eeprom-parse.h"
  49 #include "iwl-io.h"
  50 #include "iwl-trans.h"
  51 #include "iwl-op-mode.h"
  52 #include "iwl-drv.h"
  53 #include "iwl-modparams.h"
  54 #include "iwl-prph.h"
  55
  56 #include "dev.h"
  57 #include "calib.h"
  58 #include "agn.h"
  59
  60
  61 /******************************************************************************
  62  *
  63  * module boiler plate
  64  *
  65  ******************************************************************************/
  66
  67 /*
  68  * module name, copyright, version, etc.
  69  */
  70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 #define DRV_VERSION     IWLWIFI_VERSION VD
  79
  80
  81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  82 MODULE_VERSION(DRV_VERSION);
  83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  84 MODULE_LICENSE("GPL");
  85
  86 static const struct iwl_op_mode_ops iwl_dvm_ops;
  87
  88 void iwl_update_chain_flags(struct iwl_priv *priv)
  89 {
  90         struct iwl_rxon_context *ctx;
  91
  92         for_each_context(priv, ctx) {
  93                 iwlagn_set_rxon_chain(priv, ctx);
  94                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
  95                         iwlagn_commit_rxon(priv, ctx);
  96         }
  97 }
  98
  99 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 100 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 101                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 102                                u8 *beacon, u32 frame_size)
 103 {
 104         u16 tim_idx;
 105         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 106
 107         /*
 108          * The index is relative to frame start but we start looking at the
 109          * variable-length part of the beacon.
 110          */
 111         tim_idx = mgmt->u.beacon.variable - beacon;
 112
 113         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 114         while ((tim_idx < (frame_size - 2)) &&
 115                         (beacon[tim_idx] != WLAN_EID_TIM))
 116                 tim_idx += beacon[tim_idx+1] + 2;
 117
 118         /* If TIM field was found, set variables */
 119         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 120                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 121                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 122         } else
 123                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 124 }
 125
 126 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 127 {
 128         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 129         struct iwl_host_cmd cmd = {
 130                 .id = REPLY_TX_BEACON,
 131                 .flags = CMD_SYNC,
 132         };
 133         struct ieee80211_tx_info *info;
 134         u32 frame_size;
 135         u32 rate_flags;
 136         u32 rate;
 137
 138         /*
 139          * We have to set up the TX command, the TX Beacon command, and the
 140          * beacon contents.
 141          */
 142
 143         lockdep_assert_held(&priv->mutex);
 144
 145         if (!priv->beacon_ctx) {
 146                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 147                 return 0;
 148         }
 149
 150         if (WARN_ON(!priv->beacon_skb))
 151                 return -EINVAL;
 152
 153         /* Allocate beacon command */
 154         if (!priv->beacon_cmd)
 155                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 156         tx_beacon_cmd = priv->beacon_cmd;
 157         if (!tx_beacon_cmd)
 158                 return -ENOMEM;
 159
 160         frame_size = priv->beacon_skb->len;
 161
 162         /* Set up TX command fields */
 163         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 164         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 165         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 166         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 167                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 168
 169         /* Set up TX beacon command fields */
 170         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 171                            frame_size);
 172
 173         /* Set up packet rate and flags */
 174         info = IEEE80211_SKB_CB(priv->beacon_skb);
 175
 176         /*
 177          * Let's set up the rate at least somewhat correctly;
 178          * it will currently not actually be used by the uCode,
 179          * it uses the broadcast station's rate instead.
 180          */
 181         if (info->control.rates[0].idx < 0 ||
 182             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 183                 rate = 0;
 184         else
 185                 rate = info->control.rates[0].idx;
 186
 187         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 188                                               priv->nvm_data->valid_tx_ant);
 189         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 190
 191         /* In mac80211, rates for 5 GHz start at 0 */
 192         if (info->band == IEEE80211_BAND_5GHZ)
 193                 rate += IWL_FIRST_OFDM_RATE;
 194         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 195                 rate_flags |= RATE_MCS_CCK_MSK;
 196
 197         tx_beacon_cmd->tx.rate_n_flags =
 198                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 199
 200         /* Submit command */
 201         cmd.len[0] = sizeof(*tx_beacon_cmd);
 202         cmd.data[0] = tx_beacon_cmd;
 203         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 204         cmd.len[1] = frame_size;
 205         cmd.data[1] = priv->beacon_skb->data;
 206         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 207
 208         return iwl_dvm_send_cmd(priv, &cmd);
 209 }
 210
 211 static void iwl_bg_beacon_update(struct work_struct *work)
 212 {
 213         struct iwl_priv *priv =
 214                 container_of(work, struct iwl_priv, beacon_update);
 215         struct sk_buff *beacon;
 216
 217         mutex_lock(&priv->mutex);
 218         if (!priv->beacon_ctx) {
 219                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 220                 goto out;
 221         }
 222
 223         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 224                 /*
 225                  * The ucode will send beacon notifications even in
 226                  * IBSS mode, but we don't want to process them. But
 227                  * we need to defer the type check to here due to
 228                  * requiring locking around the beacon_ctx access.
 229                  */
 230                 goto out;
 231         }
 232
 233         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 234         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 235         if (!beacon) {
 236                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 237                 goto out;
 238         }
 239
 240         /* new beacon skb is allocated every time; dispose previous.*/
 241         dev_kfree_skb(priv->beacon_skb);
 242
 243         priv->beacon_skb = beacon;
 244
 245         iwlagn_send_beacon_cmd(priv);
 246  out:
 247         mutex_unlock(&priv->mutex);
 248 }
 249
 250 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 251 {
 252         struct iwl_priv *priv =
 253                 container_of(work, struct iwl_priv, bt_runtime_config);
 254
 255         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 256                 return;
 257
 258         /* dont send host command if rf-kill is on */
 259         if (!iwl_is_ready_rf(priv))
 260                 return;
 261         iwlagn_send_advance_bt_config(priv);
 262 }
 263
 264 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 265 {
 266         struct iwl_priv *priv =
 267                 container_of(work, struct iwl_priv, bt_full_concurrency);
 268         struct iwl_rxon_context *ctx;
 269
 270         mutex_lock(&priv->mutex);
 271
 272         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 273                 goto out;
 274
 275         /* dont send host command if rf-kill is on */
 276         if (!iwl_is_ready_rf(priv))
 277                 goto out;
 278
 279         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 280                        priv->bt_full_concurrent ?
 281                        "full concurrency" : "3-wire");
 282
 283         /*
 284          * LQ & RXON updated cmds must be sent before BT Config cmd
 285          * to avoid 3-wire collisions
 286          */
 287         for_each_context(priv, ctx) {
 288                 iwlagn_set_rxon_chain(priv, ctx);
 289                 iwlagn_commit_rxon(priv, ctx);
 290         }
 291
 292         iwlagn_send_advance_bt_config(priv);
 293 out:
 294         mutex_unlock(&priv->mutex);
 295 }
 296
 297 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
 298 {
 299         struct iwl_statistics_cmd statistics_cmd = {
 300                 .configuration_flags =
 301                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
 302         };
 303
 304         if (flags & CMD_ASYNC)
 305                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 306                                         CMD_ASYNC,
 307                                         sizeof(struct iwl_statistics_cmd),
 308                                         &statistics_cmd);
 309         else
 310                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 311                                         CMD_SYNC,
 312                                         sizeof(struct iwl_statistics_cmd),
 313                                         &statistics_cmd);
 314 }
 315
 316 /**
 317  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 318  *
 319  * This callback is provided in order to send a statistics request.
 320  *
 321  * This timer function is continually reset to execute within
 322  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 323  * was received.  We need to ensure we receive the statistics in order
 324  * to update the temperature used for calibrating the TXPOWER.
 325  */
 326 static void iwl_bg_statistics_periodic(unsigned long data)
 327 {
 328         struct iwl_priv *priv = (struct iwl_priv *)data;
 329
 330         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 331                 return;
 332
 333         /* dont send host command if rf-kill is on */
 334         if (!iwl_is_ready_rf(priv))
 335                 return;
 336
 337         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 338 }
 339
 340
 341 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 342                                         u32 start_idx, u32 num_events,
 343                                         u32 capacity, u32 mode)
 344 {
 345         u32 i;
 346         u32 ptr;        /* SRAM byte address of log data */
 347         u32 ev, time, data; /* event log data */
 348         unsigned long reg_flags;
 349
 350         if (mode == 0)
 351                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 352         else
 353                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 354
 355         /* Make sure device is powered up for SRAM reads */
 356         if (!iwl_trans_grab_nic_access(priv->trans, false, &reg_flags))
 357                 return;
 358
 359         /* Set starting address; reads will auto-increment */
 360         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, ptr);
 361
 362         /*
 363          * Refuse to read more than would have fit into the log from
 364          * the current start_idx. This used to happen due to the race
 365          * described below, but now WARN because the code below should
 366          * prevent it from happening here.
 367          */
 368         if (WARN_ON(num_events > capacity - start_idx))
 369                 num_events = capacity - start_idx;
 370
 371         /*
 372          * "time" is actually "data" for mode 0 (no timestamp).
 373          * place event id # at far right for easier visual parsing.
 374          */
 375         for (i = 0; i < num_events; i++) {
 376                 ev = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 377                 time = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 378                 if (mode == 0) {
 379                         trace_iwlwifi_dev_ucode_cont_event(
 380                                         priv->trans->dev, 0, time, ev);
 381                 } else {
 382                         data = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 383                         trace_iwlwifi_dev_ucode_cont_event(
 384                                         priv->trans->dev, time, data, ev);
 385                 }
 386         }
 387         /* Allow device to power down */
 388         iwl_trans_release_nic_access(priv->trans, &reg_flags);
 389 }
 390
 391 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 392 {
 393         u32 capacity;   /* event log capacity in # entries */
 394         struct {
 395                 u32 capacity;
 396                 u32 mode;
 397                 u32 wrap_counter;
 398                 u32 write_counter;
 399         } __packed read;
 400         u32 base;       /* SRAM byte address of event log header */
 401         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 402         u32 num_wraps;  /* # times uCode wrapped to top of log */
 403         u32 next_entry; /* index of next entry to be written by uCode */
 404
 405         base = priv->device_pointers.log_event_table;
 406         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 407                 iwl_trans_read_mem_bytes(priv->trans, base,
 408                                          &read, sizeof(read));
 409                 capacity = read.capacity;
 410                 mode = read.mode;
 411                 num_wraps = read.wrap_counter;
 412                 next_entry = read.write_counter;
 413         } else
 414                 return;
 415
 416         /*
 417          * Unfortunately, the uCode doesn't use temporary variables.
 418          * Therefore, it can happen that we read next_entry == capacity,
 419          * which really means next_entry == 0.
 420          */
 421         if (unlikely(next_entry == capacity))
 422                 next_entry = 0;
 423         /*
 424          * Additionally, the uCode increases the write pointer before
 425          * the wraps counter, so if the write pointer is smaller than
 426          * the old write pointer (wrap occurred) but we read that no
 427          * wrap occurred, we actually read between the next_entry and
 428          * num_wraps update (this does happen in practice!!) -- take
 429          * that into account by increasing num_wraps.
 430          */
 431         if (unlikely(next_entry < priv->event_log.next_entry &&
 432                      num_wraps == priv->event_log.num_wraps))
 433                 num_wraps++;
 434
 435         if (num_wraps == priv->event_log.num_wraps) {
 436                 iwl_print_cont_event_trace(
 437                         priv, base, priv->event_log.next_entry,
 438                         next_entry - priv->event_log.next_entry,
 439                         capacity, mode);
 440
 441                 priv->event_log.non_wraps_count++;
 442         } else {
 443                 if (num_wraps - priv->event_log.num_wraps > 1)
 444                         priv->event_log.wraps_more_count++;
 445                 else
 446                         priv->event_log.wraps_once_count++;
 447
 448                 trace_iwlwifi_dev_ucode_wrap_event(priv->trans->dev,
 449                                 num_wraps - priv->event_log.num_wraps,
 450                                 next_entry, priv->event_log.next_entry);
 451
 452                 if (next_entry < priv->event_log.next_entry) {
 453                         iwl_print_cont_event_trace(
 454                                 priv, base, priv->event_log.next_entry,
 455                                 capacity - priv->event_log.next_entry,
 456                                 capacity, mode);
 457
 458                         iwl_print_cont_event_trace(
 459                                 priv, base, 0, next_entry, capacity, mode);
 460                 } else {
 461                         iwl_print_cont_event_trace(
 462                                 priv, base, next_entry,
 463                                 capacity - next_entry,
 464                                 capacity, mode);
 465
 466                         iwl_print_cont_event_trace(
 467                                 priv, base, 0, next_entry, capacity, mode);
 468                 }
 469         }
 470
 471         priv->event_log.num_wraps = num_wraps;
 472         priv->event_log.next_entry = next_entry;
 473 }
 474
 475 /**
 476  * iwl_bg_ucode_trace - Timer callback to log ucode event
 477  *
 478  * The timer is continually set to execute every
 479  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 480  * this function is to perform continuous uCode event logging operation
 481  * if enabled
 482  */
 483 static void iwl_bg_ucode_trace(unsigned long data)
 484 {
 485         struct iwl_priv *priv = (struct iwl_priv *)data;
 486
 487         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 488                 return;
 489
 490         if (priv->event_log.ucode_trace) {
 491                 iwl_continuous_event_trace(priv);
 492                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 493                 mod_timer(&priv->ucode_trace,
 494                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 495         }
 496 }
 497
 498 static void iwl_bg_tx_flush(struct work_struct *work)
 499 {
 500         struct iwl_priv *priv =
 501                 container_of(work, struct iwl_priv, tx_flush);
 502
 503         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 504                 return;
 505
 506         /* do nothing if rf-kill is on */
 507         if (!iwl_is_ready_rf(priv))
 508                 return;
 509
 510         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 511         iwlagn_dev_txfifo_flush(priv);
 512 }
 513
 514 /*
 515  * queue/FIFO/AC mapping definitions
 516  */
 517
 518 static const u8 iwlagn_bss_ac_to_fifo[] = {
 519         IWL_TX_FIFO_VO,
 520         IWL_TX_FIFO_VI,
 521         IWL_TX_FIFO_BE,
 522         IWL_TX_FIFO_BK,
 523 };
 524
 525 static const u8 iwlagn_bss_ac_to_queue[] = {
 526         0, 1, 2, 3,
 527 };
 528
 529 static const u8 iwlagn_pan_ac_to_fifo[] = {
 530         IWL_TX_FIFO_VO_IPAN,
 531         IWL_TX_FIFO_VI_IPAN,
 532         IWL_TX_FIFO_BE_IPAN,
 533         IWL_TX_FIFO_BK_IPAN,
 534 };
 535
 536 static const u8 iwlagn_pan_ac_to_queue[] = {
 537         7, 6, 5, 4,
 538 };
 539
 540 static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 541 {
 542         int i;
 543
 544         /*
 545          * The default context is always valid,
 546          * the PAN context depends on uCode.
 547          */
 548         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
 549         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
 550                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
 551
 552         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
 553                 priv->contexts[i].ctxid = i;
 554
 555         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
 556         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
 557         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
 558         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
 559         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
 560         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
 561         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
 562         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 563         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 564         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
 565                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_MONITOR);
 566         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 567                 BIT(NL80211_IFTYPE_STATION);
 568         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
 569         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
 570         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
 571         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
 572         memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue,
 573                iwlagn_bss_ac_to_queue, sizeof(iwlagn_bss_ac_to_queue));
 574         memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo,
 575                iwlagn_bss_ac_to_fifo, sizeof(iwlagn_bss_ac_to_fifo));
 576
 577         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
 578         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
 579                 REPLY_WIPAN_RXON_TIMING;
 580         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
 581                 REPLY_WIPAN_RXON_ASSOC;
 582         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
 583         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
 584         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
 585         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
 586         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
 587         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
 588                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
 589
 590         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
 591         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
 592         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
 593         memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue,
 594                iwlagn_pan_ac_to_queue, sizeof(iwlagn_pan_ac_to_queue));
 595         memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo,
 596                iwlagn_pan_ac_to_fifo, sizeof(iwlagn_pan_ac_to_fifo));
 597         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
 598
 599         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 600 }
 601
 602 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
 603 {
 604         struct iwl_ct_kill_config cmd;
 605         struct iwl_ct_kill_throttling_config adv_cmd;
 606         int ret = 0;
 607
 608         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 609                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 610
 611         priv->thermal_throttle.ct_kill_toggle = false;
 612
 613         if (priv->lib->support_ct_kill_exit) {
 614                 adv_cmd.critical_temperature_enter =
 615                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
 616                 adv_cmd.critical_temperature_exit =
 617                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
 618
 619                 ret = iwl_dvm_send_cmd_pdu(priv,
 620                                        REPLY_CT_KILL_CONFIG_CMD,
 621                                        CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
 622                 if (ret)
 623                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 624                 else
 625                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 626                                 "succeeded, critical temperature enter is %d,"
 627                                 "exit is %d\n",
 628                                 priv->hw_params.ct_kill_threshold,
 629                                 priv->hw_params.ct_kill_exit_threshold);
 630         } else {
 631                 cmd.critical_temperature_R =
 632                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
 633
 634                 ret = iwl_dvm_send_cmd_pdu(priv,
 635                                        REPLY_CT_KILL_CONFIG_CMD,
 636                                        CMD_SYNC, sizeof(cmd), &cmd);
 637                 if (ret)
 638                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 639                 else
 640                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 641                                 "succeeded, "
 642                                 "critical temperature is %d\n",
 643                                 priv->hw_params.ct_kill_threshold);
 644         }
 645 }
 646
 647 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
 648 {
 649         struct iwl_calib_cfg_cmd calib_cfg_cmd;
 650         struct iwl_host_cmd cmd = {
 651                 .id = CALIBRATION_CFG_CMD,
 652                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
 653                 .data = { &calib_cfg_cmd, },
 654         };
 655
 656         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
 657         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
 658         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
 659
 660         return iwl_dvm_send_cmd(priv, &cmd);
 661 }
 662
 663
 664 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
 665 {
 666         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
 667           .valid = cpu_to_le32(valid_tx_ant),
 668         };
 669
 670         if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
 671                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
 672                 return iwl_dvm_send_cmd_pdu(priv,
 673                                         TX_ANT_CONFIGURATION_CMD,
 674                                         CMD_SYNC,
 675                                         sizeof(struct iwl_tx_ant_config_cmd),
 676                                         &tx_ant_cmd);
 677         } else {
 678                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
 679                 return -EOPNOTSUPP;
 680         }
 681 }
 682
 683 static void iwl_send_bt_config(struct iwl_priv *priv)
 684 {
 685         struct iwl_bt_cmd bt_cmd = {
 686                 .lead_time = BT_LEAD_TIME_DEF,
 687                 .max_kill = BT_MAX_KILL_DEF,
 688                 .kill_ack_mask = 0,
 689                 .kill_cts_mask = 0,
 690         };
 691
 692         if (!iwlwifi_mod_params.bt_coex_active)
 693                 bt_cmd.flags = BT_COEX_DISABLE;
 694         else
 695                 bt_cmd.flags = BT_COEX_ENABLE;
 696
 697         priv->bt_enable_flag = bt_cmd.flags;
 698         IWL_DEBUG_INFO(priv, "BT coex %s\n",
 699                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
 700
 701         if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 702                              CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
 703                 IWL_ERR(priv, "failed to send BT Coex Config\n");
 704 }
 705
 706 /**
 707  * iwl_alive_start - called after REPLY_ALIVE notification received
 708  *                   from protocol/runtime uCode (initialization uCode's
 709  *                   Alive gets handled by iwl_init_alive_start()).
 710  */
 711 int iwl_alive_start(struct iwl_priv *priv)
 712 {
 713         int ret = 0;
 714         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 715
 716         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 717
 718         /* After the ALIVE response, we can send host commands to the uCode */
 719         set_bit(STATUS_ALIVE, &priv->status);
 720
 721         if (iwl_is_rfkill(priv))
 722                 return -ERFKILL;
 723
 724         if (priv->event_log.ucode_trace) {
 725                 /* start collecting data now */
 726                 mod_timer(&priv->ucode_trace, jiffies);
 727         }
 728
 729         /* download priority table before any calibration request */
 730         if (priv->lib->bt_params &&
 731             priv->lib->bt_params->advanced_bt_coexist) {
 732                 /* Configure Bluetooth device coexistence support */
 733                 if (priv->lib->bt_params->bt_sco_disable)
 734                         priv->bt_enable_pspoll = false;
 735                 else
 736                         priv->bt_enable_pspoll = true;
 737
 738                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
 739                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
 740                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
 741                 iwlagn_send_advance_bt_config(priv);
 742                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
 743                 priv->cur_rssi_ctx = NULL;
 744
 745                 iwl_send_prio_tbl(priv);
 746
 747                 /* FIXME: w/a to force change uCode BT state machine */
 748                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
 749                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 750                 if (ret)
 751                         return ret;
 752                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
 753                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 754                 if (ret)
 755                         return ret;
 756         } else if (priv->lib->bt_params) {
 757                 /*
 758                  * default is 2-wire BT coexexistence support
 759                  */
 760                 iwl_send_bt_config(priv);
 761         }
 762
 763         /*
 764          * Perform runtime calibrations, including DC calibration.
 765          */
 766         iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
 767
 768         ieee80211_wake_queues(priv->hw);
 769
 770         /* Configure Tx antenna selection based on H/W config */
 771         iwlagn_send_tx_ant_config(priv, priv->nvm_data->valid_tx_ant);
 772
 773         if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
 774                 struct iwl_rxon_cmd *active_rxon =
 775                                 (struct iwl_rxon_cmd *)&ctx->active;
 776                 /* apply any changes in staging */
 777                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 778                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 779         } else {
 780                 struct iwl_rxon_context *tmp;
 781                 /* Initialize our rx_config data */
 782                 for_each_context(priv, tmp)
 783                         iwl_connection_init_rx_config(priv, tmp);
 784
 785                 iwlagn_set_rxon_chain(priv, ctx);
 786         }
 787
 788         if (!priv->wowlan) {
 789                 /* WoWLAN ucode will not reply in the same way, skip it */
 790                 iwl_reset_run_time_calib(priv);
 791         }
 792
 793         set_bit(STATUS_READY, &priv->status);
 794
 795         /* Configure the adapter for unassociated operation */
 796         ret = iwlagn_commit_rxon(priv, ctx);
 797         if (ret)
 798                 return ret;
 799
 800         /* At this point, the NIC is initialized and operational */
 801         iwl_rf_kill_ct_config(priv);
 802
 803         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
 804
 805         return iwl_power_update_mode(priv, true);
 806 }
 807
 808 /**
 809  * iwl_clear_driver_stations - clear knowledge of all stations from driver
 810  * @priv: iwl priv struct
 811  *
 812  * This is called during iwl_down() to make sure that in the case
 813  * we're coming there from a hardware restart mac80211 will be
 814  * able to reconfigure stations -- if we're getting there in the
 815  * normal down flow then the stations will already be cleared.
 816  */
 817 static void iwl_clear_driver_stations(struct iwl_priv *priv)
 818 {
 819         struct iwl_rxon_context *ctx;
 820
 821         spin_lock_bh(&priv->sta_lock);
 822         memset(priv->stations, 0, sizeof(priv->stations));
 823         priv->num_stations = 0;
 824
 825         priv->ucode_key_table = 0;
 826
 827         for_each_context(priv, ctx) {
 828                 /*
 829                  * Remove all key information that is not stored as part
 830                  * of station information since mac80211 may not have had
 831                  * a chance to remove all the keys. When device is
 832                  * reconfigured by mac80211 after an error all keys will
 833                  * be reconfigured.
 834                  */
 835                 memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
 836                 ctx->key_mapping_keys = 0;
 837         }
 838
 839         spin_unlock_bh(&priv->sta_lock);
 840 }
 841
 842 void iwl_down(struct iwl_priv *priv)
 843 {
 844         int exit_pending;
 845
 846         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
 847
 848         lockdep_assert_held(&priv->mutex);
 849
 850         iwl_scan_cancel_timeout(priv, 200);
 851
 852         exit_pending =
 853                 test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
 854
 855         iwl_clear_ucode_stations(priv, NULL);
 856         iwl_dealloc_bcast_stations(priv);
 857         iwl_clear_driver_stations(priv);
 858
 859         /* reset BT coex data */
 860         priv->bt_status = 0;
 861         priv->cur_rssi_ctx = NULL;
 862         priv->bt_is_sco = 0;
 863         if (priv->lib->bt_params)
 864                 priv->bt_traffic_load =
 865                          priv->lib->bt_params->bt_init_traffic_load;
 866         else
 867                 priv->bt_traffic_load = 0;
 868         priv->bt_full_concurrent = false;
 869         priv->bt_ci_compliance = 0;
 870
 871         /* Wipe out the EXIT_PENDING status bit if we are not actually
 872          * exiting the module */
 873         if (!exit_pending)
 874                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
 875
 876         if (priv->mac80211_registered)
 877                 ieee80211_stop_queues(priv->hw);
 878
 879         priv->ucode_loaded = false;
 880         iwl_trans_stop_device(priv->trans);
 881
 882         /* Set num_aux_in_flight must be done after the transport is stopped */
 883         atomic_set(&priv->num_aux_in_flight, 0);
 884
 885         /* Clear out all status bits but a few that are stable across reset */
 886         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
 887                                 STATUS_RF_KILL_HW |
 888                         test_bit(STATUS_FW_ERROR, &priv->status) <<
 889                                 STATUS_FW_ERROR |
 890                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
 891                                 STATUS_EXIT_PENDING;
 892
 893         dev_kfree_skb(priv->beacon_skb);
 894         priv->beacon_skb = NULL;
 895 }
 896
 897 /*****************************************************************************
 898  *
 899  * Workqueue callbacks
 900  *
 901  *****************************************************************************/
 902
 903 static void iwl_bg_run_time_calib_work(struct work_struct *work)
 904 {
 905         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 906                         run_time_calib_work);
 907
 908         mutex_lock(&priv->mutex);
 909
 910         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 911             test_bit(STATUS_SCANNING, &priv->status)) {
 912                 mutex_unlock(&priv->mutex);
 913                 return;
 914         }
 915
 916         if (priv->start_calib) {
 917                 iwl_chain_noise_calibration(priv);
 918                 iwl_sensitivity_calibration(priv);
 919         }
 920
 921         mutex_unlock(&priv->mutex);
 922 }
 923
 924 void iwlagn_prepare_restart(struct iwl_priv *priv)
 925 {
 926         bool bt_full_concurrent;
 927         u8 bt_ci_compliance;
 928         u8 bt_load;
 929         u8 bt_status;
 930         bool bt_is_sco;
 931         int i;
 932
 933         lockdep_assert_held(&priv->mutex);
 934
 935         priv->is_open = 0;
 936
 937         /*
 938          * __iwl_down() will clear the BT status variables,
 939          * which is correct, but when we restart we really
 940          * want to keep them so restore them afterwards.
 941          *
 942          * The restart process will later pick them up and
 943          * re-configure the hw when we reconfigure the BT
 944          * command.
 945          */
 946         bt_full_concurrent = priv->bt_full_concurrent;
 947         bt_ci_compliance = priv->bt_ci_compliance;
 948         bt_load = priv->bt_traffic_load;
 949         bt_status = priv->bt_status;
 950         bt_is_sco = priv->bt_is_sco;
 951
 952         iwl_down(priv);
 953
 954         priv->bt_full_concurrent = bt_full_concurrent;
 955         priv->bt_ci_compliance = bt_ci_compliance;
 956         priv->bt_traffic_load = bt_load;
 957         priv->bt_status = bt_status;
 958         priv->bt_is_sco = bt_is_sco;
 959
 960         /* reset aggregation queues */
 961         for (i = IWLAGN_FIRST_AMPDU_QUEUE; i < IWL_MAX_HW_QUEUES; i++)
 962                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
 963         /* and stop counts */
 964         for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
 965                 atomic_set(&priv->queue_stop_count[i], 0);
 966
 967         memset(priv->agg_q_alloc, 0, sizeof(priv->agg_q_alloc));
 968 }
 969
 970 static void iwl_bg_restart(struct work_struct *data)
 971 {
 972         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
 973
 974         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 975                 return;
 976
 977         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
 978                 mutex_lock(&priv->mutex);
 979                 iwlagn_prepare_restart(priv);
 980                 mutex_unlock(&priv->mutex);
 981                 iwl_cancel_deferred_work(priv);
 982                 if (priv->mac80211_registered)
 983                         ieee80211_restart_hw(priv->hw);
 984                 else
 985                         IWL_ERR(priv,
 986                                 "Cannot request restart before registrating with mac80211");
 987         } else {
 988                 WARN_ON(1);
 989         }
 990 }
 991
 992 /*****************************************************************************
 993  *
 994  * driver setup and teardown
 995  *
 996  *****************************************************************************/
 997
 998 static void iwl_setup_deferred_work(struct iwl_priv *priv)
 999 {
1000         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
1001
1002         INIT_WORK(&priv->restart, iwl_bg_restart);
1003         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
1004         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
1005         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
1006         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
1007         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
1008
1009         iwl_setup_scan_deferred_work(priv);
1010
1011         if (priv->lib->bt_params)
1012                 iwlagn_bt_setup_deferred_work(priv);
1013
1014         init_timer(&priv->statistics_periodic);
1015         priv->statistics_periodic.data = (unsigned long)priv;
1016         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
1017
1018         init_timer(&priv->ucode_trace);
1019         priv->ucode_trace.data = (unsigned long)priv;
1020         priv->ucode_trace.function = iwl_bg_ucode_trace;
1021 }
1022
1023 void iwl_cancel_deferred_work(struct iwl_priv *priv)
1024 {
1025         if (priv->lib->bt_params)
1026                 iwlagn_bt_cancel_deferred_work(priv);
1027
1028         cancel_work_sync(&priv->run_time_calib_work);
1029         cancel_work_sync(&priv->beacon_update);
1030
1031         iwl_cancel_scan_deferred_work(priv);
1032
1033         cancel_work_sync(&priv->bt_full_concurrency);
1034         cancel_work_sync(&priv->bt_runtime_config);
1035
1036         del_timer_sync(&priv->statistics_periodic);
1037         del_timer_sync(&priv->ucode_trace);
1038 }
1039
1040 static int iwl_init_drv(struct iwl_priv *priv)
1041 {
1042         spin_lock_init(&priv->sta_lock);
1043
1044         mutex_init(&priv->mutex);
1045
1046         INIT_LIST_HEAD(&priv->calib_results);
1047
1048         priv->band = IEEE80211_BAND_2GHZ;
1049
1050         priv->plcp_delta_threshold = priv->lib->plcp_delta_threshold;
1051
1052         priv->iw_mode = NL80211_IFTYPE_STATION;
1053         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1054         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1055         priv->agg_tids_count = 0;
1056
1057         priv->rx_statistics_jiffies = jiffies;
1058
1059         /* Choose which receivers/antennas to use */
1060         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1061
1062         iwl_init_scan_params(priv);
1063
1064         /* init bt coex */
1065         if (priv->lib->bt_params &&
1066             priv->lib->bt_params->advanced_bt_coexist) {
1067                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1068                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1069                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1070                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1071                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
1072                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1073         }
1074
1075         return 0;
1076 }
1077
1078 static void iwl_uninit_drv(struct iwl_priv *priv)
1079 {
1080         kfree(priv->scan_cmd);
1081         kfree(priv->beacon_cmd);
1082         kfree(rcu_dereference_raw(priv->noa_data));
1083         iwl_calib_free_results(priv);
1084 #ifdef CONFIG_IWLWIFI_DEBUGFS
1085         kfree(priv->wowlan_sram);
1086 #endif
1087 }
1088
1089 static void iwl_set_hw_params(struct iwl_priv *priv)
1090 {
1091         if (priv->cfg->ht_params)
1092                 priv->hw_params.use_rts_for_aggregation =
1093                         priv->cfg->ht_params->use_rts_for_aggregation;
1094
1095         /* Device-specific setup */
1096         priv->lib->set_hw_params(priv);
1097 }
1098
1099
1100
1101 /* show what optional capabilities we have */
1102 static void iwl_option_config(struct iwl_priv *priv)
1103 {
1104 #ifdef CONFIG_IWLWIFI_DEBUG
1105         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG enabled\n");
1106 #else
1107         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG disabled\n");
1108 #endif
1109
1110 #ifdef CONFIG_IWLWIFI_DEBUGFS
1111         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS enabled\n");
1112 #else
1113         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS disabled\n");
1114 #endif
1115
1116 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1117         IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING enabled\n");
1118 #else
1119         IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING disabled\n");
1120 #endif
1121 }
1122
1123 static int iwl_eeprom_init_hw_params(struct iwl_priv *priv)
1124 {
1125         struct iwl_nvm_data *data = priv->nvm_data;
1126         char *debug_msg;
1127
1128         if (data->sku_cap_11n_enable &&
1129             !priv->cfg->ht_params) {
1130                 IWL_ERR(priv, "Invalid 11n configuration\n");
1131                 return -EINVAL;
1132         }
1133
1134         if (!data->sku_cap_11n_enable && !data->sku_cap_band_24GHz_enable &&
1135             !data->sku_cap_band_52GHz_enable) {
1136                 IWL_ERR(priv, "Invalid device sku\n");
1137                 return -EINVAL;
1138         }
1139
1140         debug_msg = "Device SKU: 24GHz %s %s, 52GHz %s %s, 11.n %s %s\n";
1141         IWL_DEBUG_INFO(priv, debug_msg,
1142                        data->sku_cap_band_24GHz_enable ? "" : "NOT", "enabled",
1143                        data->sku_cap_band_52GHz_enable ? "" : "NOT", "enabled",
1144                        data->sku_cap_11n_enable ? "" : "NOT", "enabled");
1145
1146         priv->hw_params.tx_chains_num =
1147                 num_of_ant(data->valid_tx_ant);
1148         if (priv->cfg->rx_with_siso_diversity)
1149                 priv->hw_params.rx_chains_num = 1;
1150         else
1151                 priv->hw_params.rx_chains_num =
1152                         num_of_ant(data->valid_rx_ant);
1153
1154         IWL_DEBUG_INFO(priv, "Valid Tx ant: 0x%X, Valid Rx ant: 0x%X\n",
1155                        data->valid_tx_ant,
1156                        data->valid_rx_ant);
1157
1158         return 0;
1159 }
1160
1161 static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
1162                                                  const struct iwl_cfg *cfg,
1163                                                  const struct iwl_fw *fw,
1164                                                  struct dentry *dbgfs_dir)
1165 {
1166         struct iwl_priv *priv;
1167         struct ieee80211_hw *hw;
1168         struct iwl_op_mode *op_mode;
1169         u16 num_mac;
1170         u32 ucode_flags;
1171         struct iwl_trans_config trans_cfg = {};
1172         static const u8 no_reclaim_cmds[] = {
1173                 REPLY_RX_PHY_CMD,
1174                 REPLY_RX_MPDU_CMD,
1175                 REPLY_COMPRESSED_BA,
1176                 STATISTICS_NOTIFICATION,
1177                 REPLY_TX,
1178         };
1179         int i;
1180
1181         /************************
1182          * 1. Allocating HW data
1183          ************************/
1184         hw = iwl_alloc_all();
1185         if (!hw) {
1186                 pr_err("%s: Cannot allocate network device\n", cfg->name);
1187                 goto out;
1188         }
1189
1190         op_mode = hw->priv;
1191         op_mode->ops = &iwl_dvm_ops;
1192         priv = IWL_OP_MODE_GET_DVM(op_mode);
1193         priv->trans = trans;
1194         priv->dev = trans->dev;
1195         priv->cfg = cfg;
1196         priv->fw = fw;
1197
1198         switch (priv->cfg->device_family) {
1199         case IWL_DEVICE_FAMILY_1000:
1200         case IWL_DEVICE_FAMILY_100:
1201                 priv->lib = &iwl_dvm_1000_cfg;
1202                 break;
1203         case IWL_DEVICE_FAMILY_2000:
1204                 priv->lib = &iwl_dvm_2000_cfg;
1205                 break;
1206         case IWL_DEVICE_FAMILY_105:
1207                 priv->lib = &iwl_dvm_105_cfg;
1208                 break;
1209         case IWL_DEVICE_FAMILY_2030:
1210         case IWL_DEVICE_FAMILY_135:
1211                 priv->lib = &iwl_dvm_2030_cfg;
1212                 break;
1213         case IWL_DEVICE_FAMILY_5000:
1214                 priv->lib = &iwl_dvm_5000_cfg;
1215                 break;
1216         case IWL_DEVICE_FAMILY_5150:
1217                 priv->lib = &iwl_dvm_5150_cfg;
1218                 break;
1219         case IWL_DEVICE_FAMILY_6000:
1220         case IWL_DEVICE_FAMILY_6000i:
1221                 priv->lib = &iwl_dvm_6000_cfg;
1222                 break;
1223         case IWL_DEVICE_FAMILY_6005:
1224                 priv->lib = &iwl_dvm_6005_cfg;
1225                 break;
1226         case IWL_DEVICE_FAMILY_6050:
1227         case IWL_DEVICE_FAMILY_6150:
1228                 priv->lib = &iwl_dvm_6050_cfg;
1229                 break;
1230         case IWL_DEVICE_FAMILY_6030:
1231                 priv->lib = &iwl_dvm_6030_cfg;
1232                 break;
1233         default:
1234                 break;
1235         }
1236
1237         if (WARN_ON(!priv->lib))
1238                 goto out_free_hw;
1239
1240         /*
1241          * Populate the state variables that the transport layer needs
1242          * to know about.
1243          */
1244         trans_cfg.op_mode = op_mode;
1245         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
1246         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
1247         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
1248         if (!iwlwifi_mod_params.wd_disable)
1249                 trans_cfg.queue_watchdog_timeout =
1250                         priv->cfg->base_params->wd_timeout;
1251         else
1252                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
1253         trans_cfg.command_names = iwl_dvm_cmd_strings;
1254         trans_cfg.cmd_fifo = IWLAGN_CMD_FIFO_NUM;
1255
1256         WARN_ON(sizeof(priv->transport_queue_stop) * BITS_PER_BYTE <
1257                 priv->cfg->base_params->num_of_queues);
1258
1259         ucode_flags = fw->ucode_capa.flags;
1260
1261         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1262                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1263                 trans_cfg.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1264         } else {
1265                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1266                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1267         }
1268
1269         /* Configure transport layer */
1270         iwl_trans_configure(priv->trans, &trans_cfg);
1271
1272         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
1273         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
1274
1275         /* At this point both hw and priv are allocated. */
1276
1277         SET_IEEE80211_DEV(priv->hw, priv->trans->dev);
1278
1279         iwl_option_config(priv);
1280
1281         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1282
1283         /* is antenna coupling more than 35dB ? */
1284         priv->bt_ant_couple_ok =
1285                 (iwlwifi_mod_params.ant_coupling >
1286                         IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
1287                         true : false;
1288
1289         /* bt channel inhibition enabled*/
1290         priv->bt_ch_announce = true;
1291         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1292                        (priv->bt_ch_announce) ? "On" : "Off");
1293
1294         /* these spin locks will be used in apm_ops.init and EEPROM access
1295          * we should init now
1296          */
1297         spin_lock_init(&priv->statistics.lock);
1298
1299         /***********************
1300          * 2. Read REV register
1301          ***********************/
1302         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1303                 priv->cfg->name, priv->trans->hw_rev);
1304
1305         if (iwl_trans_start_hw(priv->trans))
1306                 goto out_free_hw;
1307
1308         /* Read the EEPROM */
1309         if (iwl_read_eeprom(priv->trans, &priv->eeprom_blob,
1310                             &priv->eeprom_blob_size)) {
1311                 IWL_ERR(priv, "Unable to init EEPROM\n");
1312                 goto out_free_hw;
1313         }
1314
1315         /* Reset chip to save power until we load uCode during "up". */
1316         iwl_trans_stop_hw(priv->trans, false);
1317
1318         priv->nvm_data = iwl_parse_eeprom_data(priv->trans->dev, priv->cfg,
1319                                                   priv->eeprom_blob,
1320                                                   priv->eeprom_blob_size);
1321         if (!priv->nvm_data)
1322                 goto out_free_eeprom_blob;
1323
1324         if (iwl_nvm_check_version(priv->nvm_data, priv->trans))
1325                 goto out_free_eeprom;
1326
1327         if (iwl_eeprom_init_hw_params(priv))
1328                 goto out_free_eeprom;
1329
1330         /* extract MAC Address */
1331         memcpy(priv->addresses[0].addr, priv->nvm_data->hw_addr, ETH_ALEN);
1332         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1333         priv->hw->wiphy->addresses = priv->addresses;
1334         priv->hw->wiphy->n_addresses = 1;
1335         num_mac = priv->nvm_data->n_hw_addrs;
1336         if (num_mac > 1) {
1337                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1338                        ETH_ALEN);
1339                 priv->addresses[1].addr[5]++;
1340                 priv->hw->wiphy->n_addresses++;
1341         }
1342
1343         /************************
1344          * 4. Setup HW constants
1345          ************************/
1346         iwl_set_hw_params(priv);
1347
1348         if (!(priv->nvm_data->sku_cap_ipan_enable)) {
1349                 IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN");
1350                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1351                 /*
1352                  * if not PAN, then don't support P2P -- might be a uCode
1353                  * packaging bug or due to the eeprom check above
1354                  */
1355                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1356                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1357
1358                 /* Configure transport layer again*/
1359                 iwl_trans_configure(priv->trans, &trans_cfg);
1360         }
1361
1362         /*******************
1363          * 5. Setup priv
1364          *******************/
1365         for (i = 0; i < IWL_MAX_HW_QUEUES; i++) {
1366                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1367                 if (i < IWLAGN_FIRST_AMPDU_QUEUE &&
1368                     i != IWL_DEFAULT_CMD_QUEUE_NUM &&
1369                     i != IWL_IPAN_CMD_QUEUE_NUM)
1370                         priv->queue_to_mac80211[i] = i;
1371                 atomic_set(&priv->queue_stop_count[i], 0);
1372         }
1373
1374         if (iwl_init_drv(priv))
1375                 goto out_free_eeprom;
1376
1377         /* At this point both hw and priv are initialized. */
1378
1379         /********************
1380          * 6. Setup services
1381          ********************/
1382         iwl_setup_deferred_work(priv);
1383         iwl_setup_rx_handlers(priv);
1384
1385         iwl_power_initialize(priv);
1386         iwl_tt_initialize(priv);
1387
1388         snprintf(priv->hw->wiphy->fw_version,
1389                  sizeof(priv->hw->wiphy->fw_version),
1390                  "%s", fw->fw_version);
1391
1392         priv->new_scan_threshold_behaviour =
1393                 !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1394
1395         priv->phy_calib_chain_noise_reset_cmd =
1396                 fw->ucode_capa.standard_phy_calibration_size;
1397         priv->phy_calib_chain_noise_gain_cmd =
1398                 fw->ucode_capa.standard_phy_calibration_size + 1;
1399
1400         /* initialize all valid contexts */
1401         iwl_init_context(priv, ucode_flags);
1402
1403         /**************************************************
1404          * This is still part of probe() in a sense...
1405          *
1406          * 7. Setup and register with mac80211 and debugfs
1407          **************************************************/
1408         if (iwlagn_mac_setup_register(priv, &fw->ucode_capa))
1409                 goto out_destroy_workqueue;
1410
1411         if (iwl_dbgfs_register(priv, dbgfs_dir))
1412                 goto out_mac80211_unregister;
1413
1414         return op_mode;
1415
1416 out_mac80211_unregister:
1417         iwlagn_mac_unregister(priv);
1418 out_destroy_workqueue:
1419         iwl_tt_exit(priv);
1420         iwl_cancel_deferred_work(priv);
1421         destroy_workqueue(priv->workqueue);
1422         priv->workqueue = NULL;
1423         iwl_uninit_drv(priv);
1424 out_free_eeprom_blob:
1425         kfree(priv->eeprom_blob);
1426 out_free_eeprom:
1427         iwl_free_nvm_data(priv->nvm_data);
1428 out_free_hw:
1429         ieee80211_free_hw(priv->hw);
1430 out:
1431         op_mode = NULL;
1432         return op_mode;
1433 }
1434
1435 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1436 {
1437         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1438
1439         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1440
1441         iwlagn_mac_unregister(priv);
1442
1443         iwl_tt_exit(priv);
1444
1445         kfree(priv->eeprom_blob);
1446         iwl_free_nvm_data(priv->nvm_data);
1447
1448         /*netif_stop_queue(dev); */
1449         flush_workqueue(priv->workqueue);
1450
1451         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1452          * priv->workqueue... so we can't take down the workqueue
1453          * until now... */
1454         destroy_workqueue(priv->workqueue);
1455         priv->workqueue = NULL;
1456
1457         iwl_uninit_drv(priv);
1458
1459         dev_kfree_skb(priv->beacon_skb);
1460
1461         iwl_trans_stop_hw(priv->trans, true);
1462         ieee80211_free_hw(priv->hw);
1463 }
1464
1465 static const char * const desc_lookup_text[] = {
1466         "OK",
1467         "FAIL",
1468         "BAD_PARAM",
1469         "BAD_CHECKSUM",
1470         "NMI_INTERRUPT_WDG",
1471         "SYSASSERT",
1472         "FATAL_ERROR",
1473         "BAD_COMMAND",
1474         "HW_ERROR_TUNE_LOCK",
1475         "HW_ERROR_TEMPERATURE",
1476         "ILLEGAL_CHAN_FREQ",
1477         "VCC_NOT_STABLE",
1478         "FH_ERROR",
1479         "NMI_INTERRUPT_HOST",
1480         "NMI_INTERRUPT_ACTION_PT",
1481         "NMI_INTERRUPT_UNKNOWN",
1482         "UCODE_VERSION_MISMATCH",
1483         "HW_ERROR_ABS_LOCK",
1484         "HW_ERROR_CAL_LOCK_FAIL",
1485         "NMI_INTERRUPT_INST_ACTION_PT",
1486         "NMI_INTERRUPT_DATA_ACTION_PT",
1487         "NMI_TRM_HW_ER",
1488         "NMI_INTERRUPT_TRM",
1489         "NMI_INTERRUPT_BREAK_POINT",
1490         "DEBUG_0",
1491         "DEBUG_1",
1492         "DEBUG_2",
1493         "DEBUG_3",
1494 };
1495
1496 static struct { char *name; u8 num; } advanced_lookup[] = {
1497         { "NMI_INTERRUPT_WDG", 0x34 },
1498         { "SYSASSERT", 0x35 },
1499         { "UCODE_VERSION_MISMATCH", 0x37 },
1500         { "BAD_COMMAND", 0x38 },
1501         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1502         { "FATAL_ERROR", 0x3D },
1503         { "NMI_TRM_HW_ERR", 0x46 },
1504         { "NMI_INTERRUPT_TRM", 0x4C },
1505         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1506         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1507         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1508         { "NMI_INTERRUPT_HOST", 0x66 },
1509         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1510         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1511         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1512         { "ADVANCED_SYSASSERT", 0 },
1513 };
1514
1515 static const char *desc_lookup(u32 num)
1516 {
1517         int i;
1518         int max = ARRAY_SIZE(desc_lookup_text);
1519
1520         if (num < max)
1521                 return desc_lookup_text[num];
1522
1523         max = ARRAY_SIZE(advanced_lookup) - 1;
1524         for (i = 0; i < max; i++) {
1525                 if (advanced_lookup[i].num == num)
1526                         break;
1527         }
1528         return advanced_lookup[i].name;
1529 }
1530
1531 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1532 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1533
1534 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
1535 {
1536         struct iwl_trans *trans = priv->trans;
1537         u32 base;
1538         struct iwl_error_event_table table;
1539
1540         base = priv->device_pointers.error_event_table;
1541         if (priv->cur_ucode == IWL_UCODE_INIT) {
1542                 if (!base)
1543                         base = priv->fw->init_errlog_ptr;
1544         } else {
1545                 if (!base)
1546                         base = priv->fw->inst_errlog_ptr;
1547         }
1548
1549         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1550                 IWL_ERR(priv,
1551                         "Not valid error log pointer 0x%08X for %s uCode\n",
1552                         base,
1553                         (priv->cur_ucode == IWL_UCODE_INIT)
1554                                         ? "Init" : "RT");
1555                 return;
1556         }
1557
1558         /*TODO: Update dbgfs with ISR error stats obtained below */
1559         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
1560
1561         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1562                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
1563                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
1564                         priv->status, table.valid);
1565         }
1566
1567         trace_iwlwifi_dev_ucode_error(trans->dev, table.error_id, table.tsf_low,
1568                                       table.data1, table.data2, table.line,
1569                                       table.blink1, table.blink2, table.ilink1,
1570                                       table.ilink2, table.bcon_time, table.gp1,
1571                                       table.gp2, table.gp3, table.ucode_ver,
1572                                       table.hw_ver, table.brd_ver);
1573         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1574                 desc_lookup(table.error_id));
1575         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1576         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1577         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1578         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1579         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1580         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1581         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1582         IWL_ERR(priv, "0x%08X | line\n", table.line);
1583         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1584         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1585         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1586         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1587         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1588         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1589         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1590         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1591         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1592         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1593         IWL_ERR(priv, "0x%08X | isr0\n", table.isr0);
1594         IWL_ERR(priv, "0x%08X | isr1\n", table.isr1);
1595         IWL_ERR(priv, "0x%08X | isr2\n", table.isr2);
1596         IWL_ERR(priv, "0x%08X | isr3\n", table.isr3);
1597         IWL_ERR(priv, "0x%08X | isr4\n", table.isr4);
1598         IWL_ERR(priv, "0x%08X | isr_pref\n", table.isr_pref);
1599         IWL_ERR(priv, "0x%08X | wait_event\n", table.wait_event);
1600         IWL_ERR(priv, "0x%08X | l2p_control\n", table.l2p_control);
1601         IWL_ERR(priv, "0x%08X | l2p_duration\n", table.l2p_duration);
1602         IWL_ERR(priv, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
1603         IWL_ERR(priv, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
1604         IWL_ERR(priv, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
1605         IWL_ERR(priv, "0x%08X | timestamp\n", table.u_timestamp);
1606         IWL_ERR(priv, "0x%08X | flow_handler\n", table.flow_handler);
1607 }
1608
1609 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1610
1611 /**
1612  * iwl_print_event_log - Dump error event log to syslog
1613  *
1614  */
1615 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1616                                u32 num_events, u32 mode,
1617                                int pos, char **buf, size_t bufsz)
1618 {
1619         u32 i;
1620         u32 base;       /* SRAM byte address of event log header */
1621         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1622         u32 ptr;        /* SRAM byte address of log data */
1623         u32 ev, time, data; /* event log data */
1624         unsigned long reg_flags;
1625
1626         struct iwl_trans *trans = priv->trans;
1627
1628         if (num_events == 0)
1629                 return pos;
1630
1631         base = priv->device_pointers.log_event_table;
1632         if (priv->cur_ucode == IWL_UCODE_INIT) {
1633                 if (!base)
1634                         base = priv->fw->init_evtlog_ptr;
1635         } else {
1636                 if (!base)
1637                         base = priv->fw->inst_evtlog_ptr;
1638         }
1639
1640         if (mode == 0)
1641                 event_size = 2 * sizeof(u32);
1642         else
1643                 event_size = 3 * sizeof(u32);
1644
1645         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1646
1647         /* Make sure device is powered up for SRAM reads */
1648         if (!iwl_trans_grab_nic_access(trans, false, &reg_flags))
1649                 return pos;
1650
1651         /* Set starting address; reads will auto-increment */
1652         iwl_write32(trans, HBUS_TARG_MEM_RADDR, ptr);
1653
1654         /* "time" is actually "data" for mode 0 (no timestamp).
1655         * place event id # at far right for easier visual parsing. */
1656         for (i = 0; i < num_events; i++) {
1657                 ev = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1658                 time = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1659                 if (mode == 0) {
1660                         /* data, ev */
1661                         if (bufsz) {
1662                                 pos += scnprintf(*buf + pos, bufsz - pos,
1663                                                 "EVT_LOG:0x%08x:%04u\n",
1664                                                 time, ev);
1665                         } else {
1666                                 trace_iwlwifi_dev_ucode_event(trans->dev, 0,
1667                                         time, ev);
1668                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1669                                         time, ev);
1670                         }
1671                 } else {
1672                         data = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1673                         if (bufsz) {
1674                                 pos += scnprintf(*buf + pos, bufsz - pos,
1675                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1676                                                  time, data, ev);
1677                         } else {
1678                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1679                                         time, data, ev);
1680                                 trace_iwlwifi_dev_ucode_event(trans->dev, time,
1681                                         data, ev);
1682                         }
1683                 }
1684         }
1685
1686         /* Allow device to power down */
1687         iwl_trans_release_nic_access(trans, &reg_flags);
1688         return pos;
1689 }
1690
1691 /**
1692  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1693  */
1694 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1695                                     u32 num_wraps, u32 next_entry,
1696                                     u32 size, u32 mode,
1697                                     int pos, char **buf, size_t bufsz)
1698 {
1699         /*
1700          * display the newest DEFAULT_LOG_ENTRIES entries
1701          * i.e the entries just before the next ont that uCode would fill.
1702          */
1703         if (num_wraps) {
1704                 if (next_entry < size) {
1705                         pos = iwl_print_event_log(priv,
1706                                                 capacity - (size - next_entry),
1707                                                 size - next_entry, mode,
1708                                                 pos, buf, bufsz);
1709                         pos = iwl_print_event_log(priv, 0,
1710                                                   next_entry, mode,
1711                                                   pos, buf, bufsz);
1712                 } else
1713                         pos = iwl_print_event_log(priv, next_entry - size,
1714                                                   size, mode, pos, buf, bufsz);
1715         } else {
1716                 if (next_entry < size) {
1717                         pos = iwl_print_event_log(priv, 0, next_entry,
1718                                                   mode, pos, buf, bufsz);
1719                 } else {
1720                         pos = iwl_print_event_log(priv, next_entry - size,
1721                                                   size, mode, pos, buf, bufsz);
1722                 }
1723         }
1724         return pos;
1725 }
1726
1727 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1728
1729 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1730                             char **buf)
1731 {
1732         u32 base;       /* SRAM byte address of event log header */
1733         u32 capacity;   /* event log capacity in # entries */
1734         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1735         u32 num_wraps;  /* # times uCode wrapped to top of log */
1736         u32 next_entry; /* index of next entry to be written by uCode */
1737         u32 size;       /* # entries that we'll print */
1738         u32 logsize;
1739         int pos = 0;
1740         size_t bufsz = 0;
1741         struct iwl_trans *trans = priv->trans;
1742
1743         base = priv->device_pointers.log_event_table;
1744         if (priv->cur_ucode == IWL_UCODE_INIT) {
1745                 logsize = priv->fw->init_evtlog_size;
1746                 if (!base)
1747                         base = priv->fw->init_evtlog_ptr;
1748         } else {
1749                 logsize = priv->fw->inst_evtlog_size;
1750                 if (!base)
1751                         base = priv->fw->inst_evtlog_ptr;
1752         }
1753
1754         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1755                 IWL_ERR(priv,
1756                         "Invalid event log pointer 0x%08X for %s uCode\n",
1757                         base,
1758                         (priv->cur_ucode == IWL_UCODE_INIT)
1759                                         ? "Init" : "RT");
1760                 return -EINVAL;
1761         }
1762
1763         /* event log header */
1764         capacity = iwl_trans_read_mem32(trans, base);
1765         mode = iwl_trans_read_mem32(trans, base + (1 * sizeof(u32)));
1766         num_wraps = iwl_trans_read_mem32(trans, base + (2 * sizeof(u32)));
1767         next_entry = iwl_trans_read_mem32(trans, base + (3 * sizeof(u32)));
1768
1769         if (capacity > logsize) {
1770                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d "
1771                         "entries\n", capacity, logsize);
1772                 capacity = logsize;
1773         }
1774
1775         if (next_entry > logsize) {
1776                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1777                         next_entry, logsize);
1778                 next_entry = logsize;
1779         }
1780
1781         size = num_wraps ? capacity : next_entry;
1782
1783         /* bail out if nothing in log */
1784         if (size == 0) {
1785                 IWL_ERR(trans, "Start IWL Event Log Dump: nothing in log\n");
1786                 return pos;
1787         }
1788
1789         if (!(iwl_have_debug_level(IWL_DL_FW_ERRORS)) && !full_log)
1790                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1791                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1792         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1793                 size);
1794
1795 #ifdef CONFIG_IWLWIFI_DEBUG
1796         if (buf) {
1797                 if (full_log)
1798                         bufsz = capacity * 48;
1799                 else
1800                         bufsz = size * 48;
1801                 *buf = kmalloc(bufsz, GFP_KERNEL);
1802                 if (!*buf)
1803                         return -ENOMEM;
1804         }
1805         if (iwl_have_debug_level(IWL_DL_FW_ERRORS) || full_log) {
1806                 /*
1807                  * if uCode has wrapped back to top of log,
1808                  * start at the oldest entry,
1809                  * i.e the next one that uCode would fill.
1810                  */
1811                 if (num_wraps)
1812                         pos = iwl_print_event_log(priv, next_entry,
1813                                                 capacity - next_entry, mode,
1814                                                 pos, buf, bufsz);
1815                 /* (then/else) start at top of log */
1816                 pos = iwl_print_event_log(priv, 0,
1817                                           next_entry, mode, pos, buf, bufsz);
1818         } else
1819                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1820                                                 next_entry, size, mode,
1821                                                 pos, buf, bufsz);
1822 #else
1823         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1824                                         next_entry, size, mode,
1825                                         pos, buf, bufsz);
1826 #endif
1827         return pos;
1828 }
1829
1830 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
1831 {
1832         unsigned int reload_msec;
1833         unsigned long reload_jiffies;
1834
1835         if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
1836                 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
1837
1838         /* uCode is no longer loaded. */
1839         priv->ucode_loaded = false;
1840
1841         /* Set the FW error flag -- cleared on iwl_down */
1842         set_bit(STATUS_FW_ERROR, &priv->status);
1843
1844         iwl_abort_notification_waits(&priv->notif_wait);
1845
1846         /* Keep the restart process from trying to send host
1847          * commands by clearing the ready bit */
1848         clear_bit(STATUS_READY, &priv->status);
1849
1850         if (!ondemand) {
1851                 /*
1852                  * If firmware keep reloading, then it indicate something
1853                  * serious wrong and firmware having problem to recover
1854                  * from it. Instead of keep trying which will fill the syslog
1855                  * and hang the system, let's just stop it
1856                  */
1857                 reload_jiffies = jiffies;
1858                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
1859                                         (long) priv->reload_jiffies);
1860                 priv->reload_jiffies = reload_jiffies;
1861                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
1862                         priv->reload_count++;
1863                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
1864                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
1865                                 return;
1866                         }
1867                 } else
1868                         priv->reload_count = 0;
1869         }
1870
1871         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1872                 if (iwlwifi_mod_params.restart_fw) {
1873                         IWL_DEBUG_FW_ERRORS(priv,
1874                                   "Restarting adapter due to uCode error.\n");
1875                         queue_work(priv->workqueue, &priv->restart);
1876                 } else
1877                         IWL_DEBUG_FW_ERRORS(priv,
1878                                   "Detected FW error, but not restarting\n");
1879         }
1880 }
1881
1882 static void iwl_nic_error(struct iwl_op_mode *op_mode)
1883 {
1884         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1885
1886         IWL_ERR(priv, "Loaded firmware version: %s\n",
1887                 priv->fw->fw_version);
1888
1889         iwl_dump_nic_error_log(priv);
1890         iwl_dump_nic_event_log(priv, false, NULL);
1891
1892         iwlagn_fw_error(priv, false);
1893 }
1894
1895 static void iwl_cmd_queue_full(struct iwl_op_mode *op_mode)
1896 {
1897         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1898
1899         if (!iwl_check_for_ct_kill(priv)) {
1900                 IWL_ERR(priv, "Restarting adapter queue is full\n");
1901                 iwlagn_fw_error(priv, false);
1902         }
1903 }
1904
1905 #define EEPROM_RF_CONFIG_TYPE_MAX      0x3
1906
1907 static void iwl_nic_config(struct iwl_op_mode *op_mode)
1908 {
1909         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1910
1911         /* SKU Control */
1912         iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
1913                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
1914                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP,
1915                                 (CSR_HW_REV_STEP(priv->trans->hw_rev) <<
1916                                         CSR_HW_IF_CONFIG_REG_POS_MAC_STEP) |
1917                                 (CSR_HW_REV_DASH(priv->trans->hw_rev) <<
1918                                         CSR_HW_IF_CONFIG_REG_POS_MAC_DASH));
1919
1920         /* write radio config values to register */
1921         if (priv->nvm_data->radio_cfg_type <= EEPROM_RF_CONFIG_TYPE_MAX) {
1922                 u32 reg_val =
1923                         priv->nvm_data->radio_cfg_type <<
1924                                 CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE |
1925                         priv->nvm_data->radio_cfg_step <<
1926                                 CSR_HW_IF_CONFIG_REG_POS_PHY_STEP |
1927                         priv->nvm_data->radio_cfg_dash <<
1928                                 CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
1929
1930                 iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
1931                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
1932                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
1933                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH,
1934                                         reg_val);
1935
1936                 IWL_INFO(priv, "Radio type=0x%x-0x%x-0x%x\n",
1937                          priv->nvm_data->radio_cfg_type,
1938                          priv->nvm_data->radio_cfg_step,
1939                          priv->nvm_data->radio_cfg_dash);
1940         } else {
1941                 WARN_ON(1);
1942         }
1943
1944         /* set CSR_HW_CONFIG_REG for uCode use */
1945         iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
1946                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
1947                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
1948
1949         /* W/A : NIC is stuck in a reset state after Early PCIe power off
1950          * (PCIe power is lost before PERST# is asserted),
1951          * causing ME FW to lose ownership and not being able to obtain it back.
1952          */
1953         iwl_set_bits_mask_prph(priv->trans, APMG_PS_CTRL_REG,
1954                                APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
1955                                ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
1956
1957         if (priv->lib->nic_config)
1958                 priv->lib->nic_config(priv);
1959 }
1960
1961 static void iwl_wimax_active(struct iwl_op_mode *op_mode)
1962 {
1963         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1964
1965         clear_bit(STATUS_READY, &priv->status);
1966         IWL_ERR(priv, "RF is used by WiMAX\n");
1967 }
1968
1969 static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
1970 {
1971         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1972         int mq = priv->queue_to_mac80211[queue];
1973
1974         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
1975                 return;
1976
1977         if (atomic_inc_return(&priv->queue_stop_count[mq]) > 1) {
1978                 IWL_DEBUG_TX_QUEUES(priv,
1979                         "queue %d (mac80211 %d) already stopped\n",
1980                         queue, mq);
1981                 return;
1982         }
1983
1984         set_bit(mq, &priv->transport_queue_stop);
1985         ieee80211_stop_queue(priv->hw, mq);
1986 }
1987
1988 static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
1989 {
1990         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1991         int mq = priv->queue_to_mac80211[queue];
1992
1993         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
1994                 return;
1995
1996         if (atomic_dec_return(&priv->queue_stop_count[mq]) > 0) {
1997                 IWL_DEBUG_TX_QUEUES(priv,
1998                         "queue %d (mac80211 %d) already awake\n",
1999                         queue, mq);
2000                 return;
2001         }
2002
2003         clear_bit(mq, &priv->transport_queue_stop);
2004
2005         if (!priv->passive_no_rx)
2006                 ieee80211_wake_queue(priv->hw, mq);
2007 }
2008
2009 void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
2010 {
2011         int mq;
2012
2013         if (!priv->passive_no_rx)
2014                 return;
2015
2016         for (mq = 0; mq < IWLAGN_FIRST_AMPDU_QUEUE; mq++) {
2017                 if (!test_bit(mq, &priv->transport_queue_stop)) {
2018                         IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d", mq);
2019                         ieee80211_wake_queue(priv->hw, mq);
2020                 } else {
2021                         IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d", mq);
2022                 }
2023         }
2024
2025         priv->passive_no_rx = false;
2026 }
2027
2028 static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
2029 {
2030         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2031         struct ieee80211_tx_info *info;
2032
2033         info = IEEE80211_SKB_CB(skb);
2034         iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
2035         ieee80211_free_txskb(priv->hw, skb);
2036 }
2037
2038 static void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
2039 {
2040         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2041
2042         if (state)
2043                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2044         else
2045                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2046
2047         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
2048 }
2049
2050 static const struct iwl_op_mode_ops iwl_dvm_ops = {
2051         .start = iwl_op_mode_dvm_start,
2052         .stop = iwl_op_mode_dvm_stop,
2053         .rx = iwl_rx_dispatch,
2054         .queue_full = iwl_stop_sw_queue,
2055         .queue_not_full = iwl_wake_sw_queue,
2056         .hw_rf_kill = iwl_set_hw_rfkill_state,
2057         .free_skb = iwl_free_skb,
2058         .nic_error = iwl_nic_error,
2059         .cmd_queue_full = iwl_cmd_queue_full,
2060         .nic_config = iwl_nic_config,
2061         .wimax_active = iwl_wimax_active,
2062 };
2063
2064 /*****************************************************************************
2065  *
2066  * driver and module entry point
2067  *
2068  *****************************************************************************/
2069 static int __init iwl_init(void)
2070 {
2071
2072         int ret;
2073
2074         ret = iwlagn_rate_control_register();
2075         if (ret) {
2076                 pr_err("Unable to register rate control algorithm: %d\n", ret);
2077                 return ret;
2078         }
2079
2080         ret = iwl_opmode_register("iwldvm", &iwl_dvm_ops);
2081         if (ret) {
2082                 pr_err("Unable to register op_mode: %d\n", ret);
2083                 iwlagn_rate_control_unregister();
2084         }
2085
2086         return ret;
2087 }
2088 module_init(iwl_init);
2089
2090 static void __exit iwl_exit(void)
2091 {
2092         iwl_opmode_deregister("iwldvm");
2093         iwlagn_rate_control_unregister();
2094 }
2095 module_exit(iwl_exit);