drivers/net/wireless/iwmc3200wifi/main.c

   1 /*
   2  * Intel Wireless Multicomm 3200 WiFi driver
   3  *
   4  * Copyright (C) 2009 Intel Corporation. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  *   * Redistributions of source code must retain the above copyright
  11  *     notice, this list of conditions and the following disclaimer.
  12  *   * Redistributions in binary form must reproduce the above copyright
  13  *     notice, this list of conditions and the following disclaimer in
  14  *     the documentation and/or other materials provided with the
  15  *     distribution.
  16  *   * Neither the name of Intel Corporation nor the names of its
  17  *     contributors may be used to endorse or promote products derived
  18  *     from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  *
  33  * Intel Corporation <ilw@linux.intel.com>
  34  * Samuel Ortiz <samuel.ortiz@intel.com>
  35  * Zhu Yi <yi.zhu@intel.com>
  36  *
  37  */
  38
  39 #include <linux/kernel.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/sched.h>
  42 #include <linux/ieee80211.h>
  43 #include <linux/wireless.h>
  44
  45 #include "iwm.h"
  46 #include "debug.h"
  47 #include "bus.h"
  48 #include "umac.h"
  49 #include "commands.h"
  50 #include "hal.h"
  51 #include "fw.h"
  52 #include "rx.h"
  53
  54 static struct iwm_conf def_iwm_conf = {
  55
  56         .sdio_ior_timeout       = 5000,
  57         .calib_map              = BIT(CALIB_CFG_DC_IDX) |
  58                                   BIT(CALIB_CFG_LO_IDX) |
  59                                   BIT(CALIB_CFG_TX_IQ_IDX)      |
  60                                   BIT(CALIB_CFG_RX_IQ_IDX)      |
  61                                   BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
  62         .expected_calib_map     = BIT(PHY_CALIBRATE_DC_CMD)     |
  63                                   BIT(PHY_CALIBRATE_LO_CMD)     |
  64                                   BIT(PHY_CALIBRATE_TX_IQ_CMD)  |
  65                                   BIT(PHY_CALIBRATE_RX_IQ_CMD)  |
  66                                   BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
  67         .ct_kill_entry          = 110,
  68         .ct_kill_exit           = 110,
  69         .reset_on_fatal_err     = 1,
  70         .auto_connect           = 1,
  71         .wimax_not_present      = 0,
  72         .enable_qos             = 1,
  73         .mode                   = UMAC_MODE_BSS,
  74
  75         /* UMAC configuration */
  76         .power_index            = 0,
  77         .frag_threshold         = IEEE80211_MAX_FRAG_THRESHOLD,
  78         .rts_threshold          = IEEE80211_MAX_RTS_THRESHOLD,
  79         .cts_to_self            = 0,
  80
  81         .assoc_timeout          = 2,
  82         .roam_timeout           = 10,
  83         .wireless_mode          = WIRELESS_MODE_11A | WIRELESS_MODE_11G |
  84                                   WIRELESS_MODE_11N,
  85         .coexist_mode           = COEX_MODE_CM,
  86
  87         /* IBSS */
  88         .ibss_band              = UMAC_BAND_2GHZ,
  89         .ibss_channel           = 1,
  90
  91         .mac_addr               = {0x00, 0x02, 0xb3, 0x01, 0x02, 0x03},
  92 };
  93
  94 static int modparam_reset;
  95 module_param_named(reset, modparam_reset, bool, 0644);
  96 MODULE_PARM_DESC(reset, "reset on firmware errors (default 0 [not reset])");
  97
  98 int iwm_mode_to_nl80211_iftype(int mode)
  99 {
 100         switch (mode) {
 101         case UMAC_MODE_BSS:
 102                 return NL80211_IFTYPE_STATION;
 103         case UMAC_MODE_IBSS:
 104                 return NL80211_IFTYPE_ADHOC;
 105         default:
 106                 return NL80211_IFTYPE_UNSPECIFIED;
 107         }
 108
 109         return 0;
 110 }
 111
 112 static void iwm_statistics_request(struct work_struct *work)
 113 {
 114         struct iwm_priv *iwm =
 115                 container_of(work, struct iwm_priv, stats_request.work);
 116
 117         iwm_send_umac_stats_req(iwm, 0);
 118 }
 119
 120 static void iwm_disconnect_work(struct work_struct *work)
 121 {
 122         struct iwm_priv *iwm =
 123                 container_of(work, struct iwm_priv, disconnect.work);
 124
 125         if (iwm->umac_profile_active)
 126                 iwm_invalidate_mlme_profile(iwm);
 127
 128         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 129         iwm->umac_profile_active = 0;
 130         memset(iwm->bssid, 0, ETH_ALEN);
 131         iwm->channel = 0;
 132
 133         iwm_link_off(iwm);
 134
 135         wake_up_interruptible(&iwm->mlme_queue);
 136
 137         cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0, GFP_KERNEL);
 138 }
 139
 140 static void iwm_ct_kill_work(struct work_struct *work)
 141 {
 142         struct iwm_priv *iwm =
 143                 container_of(work, struct iwm_priv, ct_kill_delay.work);
 144         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 145
 146         IWM_INFO(iwm, "CT kill delay timeout\n");
 147
 148         wiphy_rfkill_set_hw_state(wiphy, false);
 149 }
 150
 151 static int __iwm_up(struct iwm_priv *iwm);
 152 static int __iwm_down(struct iwm_priv *iwm);
 153
 154 static void iwm_reset_worker(struct work_struct *work)
 155 {
 156         struct iwm_priv *iwm;
 157         struct iwm_umac_profile *profile = NULL;
 158         int uninitialized_var(ret), retry = 0;
 159
 160         iwm = container_of(work, struct iwm_priv, reset_worker);
 161
 162         /*
 163          * XXX: The iwm->mutex is introduced purely for this reset work,
 164          * because the other users for iwm_up and iwm_down are only netdev
 165          * ndo_open and ndo_stop which are already protected by rtnl.
 166          * Please remove iwm->mutex together if iwm_reset_worker() is not
 167          * required in the future.
 168          */
 169         if (!mutex_trylock(&iwm->mutex)) {
 170                 IWM_WARN(iwm, "We are in the middle of interface bringing "
 171                          "UP/DOWN. Skip driver resetting.\n");
 172                 return;
 173         }
 174
 175         if (iwm->umac_profile_active) {
 176                 profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
 177                 if (profile)
 178                         memcpy(profile, iwm->umac_profile, sizeof(*profile));
 179                 else
 180                         IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
 181         }
 182
 183         __iwm_down(iwm);
 184
 185         while (retry++ < 3) {
 186                 ret = __iwm_up(iwm);
 187                 if (!ret)
 188                         break;
 189
 190                 schedule_timeout_uninterruptible(10 * HZ);
 191         }
 192
 193         if (ret) {
 194                 IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);
 195
 196                 kfree(profile);
 197                 goto out;
 198         }
 199
 200         if (profile) {
 201                 IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
 202                 memcpy(iwm->umac_profile, profile, sizeof(*profile));
 203                 iwm_send_mlme_profile(iwm);
 204                 kfree(profile);
 205         } else
 206                 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 207
 208  out:
 209         mutex_unlock(&iwm->mutex);
 210 }
 211
 212 static void iwm_auth_retry_worker(struct work_struct *work)
 213 {
 214         struct iwm_priv *iwm;
 215         int i, ret;
 216
 217         iwm = container_of(work, struct iwm_priv, auth_retry_worker);
 218         if (iwm->umac_profile_active) {
 219                 ret = iwm_invalidate_mlme_profile(iwm);
 220                 if (ret < 0)
 221                         return;
 222         }
 223
 224         iwm->umac_profile->sec.auth_type = UMAC_AUTH_TYPE_LEGACY_PSK;
 225
 226         ret = iwm_send_mlme_profile(iwm);
 227         if (ret < 0)
 228                 return;
 229
 230         for (i = 0; i < IWM_NUM_KEYS; i++)
 231                 if (iwm->keys[i].key_len)
 232                         iwm_set_key(iwm, 0, &iwm->keys[i]);
 233
 234         iwm_set_tx_key(iwm, iwm->default_key);
 235 }
 236
 237
 238
 239 static void iwm_watchdog(unsigned long data)
 240 {
 241         struct iwm_priv *iwm = (struct iwm_priv *)data;
 242
 243         IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");
 244
 245         if (modparam_reset)
 246                 iwm_resetting(iwm);
 247 }
 248
 249 int iwm_priv_init(struct iwm_priv *iwm)
 250 {
 251         int i, j;
 252         char name[32];
 253
 254         iwm->status = 0;
 255         INIT_LIST_HEAD(&iwm->pending_notif);
 256         init_waitqueue_head(&iwm->notif_queue);
 257         init_waitqueue_head(&iwm->nonwifi_queue);
 258         init_waitqueue_head(&iwm->wifi_ntfy_queue);
 259         init_waitqueue_head(&iwm->mlme_queue);
 260         memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
 261         spin_lock_init(&iwm->tx_credit.lock);
 262         INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
 263         INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
 264         iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
 265         iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
 266         spin_lock_init(&iwm->cmd_lock);
 267         iwm->scan_id = 1;
 268         INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
 269         INIT_DELAYED_WORK(&iwm->disconnect, iwm_disconnect_work);
 270         INIT_DELAYED_WORK(&iwm->ct_kill_delay, iwm_ct_kill_work);
 271         INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
 272         INIT_WORK(&iwm->auth_retry_worker, iwm_auth_retry_worker);
 273         INIT_LIST_HEAD(&iwm->bss_list);
 274
 275         skb_queue_head_init(&iwm->rx_list);
 276         INIT_LIST_HEAD(&iwm->rx_tickets);
 277         for (i = 0; i < IWM_RX_ID_HASH; i++)
 278                 INIT_LIST_HEAD(&iwm->rx_packets[i]);
 279
 280         INIT_WORK(&iwm->rx_worker, iwm_rx_worker);
 281
 282         iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
 283         if (!iwm->rx_wq)
 284                 return -EAGAIN;
 285
 286         for (i = 0; i < IWM_TX_QUEUES; i++) {
 287                 INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
 288                 snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
 289                 iwm->txq[i].id = i;
 290                 iwm->txq[i].wq = create_singlethread_workqueue(name);
 291                 if (!iwm->txq[i].wq)
 292                         return -EAGAIN;
 293
 294                 skb_queue_head_init(&iwm->txq[i].queue);
 295                 skb_queue_head_init(&iwm->txq[i].stopped_queue);
 296                 spin_lock_init(&iwm->txq[i].lock);
 297         }
 298
 299         for (i = 0; i < IWM_NUM_KEYS; i++)
 300                 memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
 301
 302         iwm->default_key = -1;
 303
 304         for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 305                 for (j = 0; j < IWM_UMAC_TID_NR; j++) {
 306                         mutex_init(&iwm->sta_table[i].tid_info[j].mutex);
 307                         iwm->sta_table[i].tid_info[j].stopped = false;
 308                 }
 309
 310         init_timer(&iwm->watchdog);
 311         iwm->watchdog.function = iwm_watchdog;
 312         iwm->watchdog.data = (unsigned long)iwm;
 313         mutex_init(&iwm->mutex);
 314
 315         iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
 316                                    GFP_KERNEL);
 317         if (iwm->last_fw_err == NULL)
 318                 return -ENOMEM;
 319
 320         return 0;
 321 }
 322
 323 void iwm_priv_deinit(struct iwm_priv *iwm)
 324 {
 325         int i;
 326
 327         for (i = 0; i < IWM_TX_QUEUES; i++)
 328                 destroy_workqueue(iwm->txq[i].wq);
 329
 330         destroy_workqueue(iwm->rx_wq);
 331         kfree(iwm->last_fw_err);
 332 }
 333
 334 /*
 335  * We reset all the structures, and we reset the UMAC.
 336  * After calling this routine, you're expected to reload
 337  * the firmware.
 338  */
 339 void iwm_reset(struct iwm_priv *iwm)
 340 {
 341         struct iwm_notif *notif, *next;
 342
 343         if (test_bit(IWM_STATUS_READY, &iwm->status))
 344                 iwm_target_reset(iwm);
 345
 346         if (test_bit(IWM_STATUS_RESETTING, &iwm->status)) {
 347                 iwm->status = 0;
 348                 set_bit(IWM_STATUS_RESETTING, &iwm->status);
 349         } else
 350                 iwm->status = 0;
 351         iwm->scan_id = 1;
 352
 353         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 354                 list_del(&notif->pending);
 355                 kfree(notif->buf);
 356                 kfree(notif);
 357         }
 358
 359         iwm_cmd_flush(iwm);
 360
 361         flush_workqueue(iwm->rx_wq);
 362
 363         iwm_link_off(iwm);
 364 }
 365
 366 void iwm_resetting(struct iwm_priv *iwm)
 367 {
 368         set_bit(IWM_STATUS_RESETTING, &iwm->status);
 369
 370         schedule_work(&iwm->reset_worker);
 371 }
 372
 373 /*
 374  * Notification code:
 375  *
 376  * We're faced with the following issue: Any host command can
 377  * have an answer or not, and if there's an answer to expect,
 378  * it can be treated synchronously or asynchronously.
 379  * To work around the synchronous answer case, we implemented
 380  * our notification mechanism.
 381  * When a code path needs to wait for a command response
 382  * synchronously, it calls notif_handle(), which waits for the
 383  * right notification to show up, and then process it. Before
 384  * starting to wait, it registered as a waiter for this specific
 385  * answer (by toggling a bit in on of the handler_map), so that
 386  * the rx code knows that it needs to send a notification to the
 387  * waiting processes. It does so by calling iwm_notif_send(),
 388  * which adds the notification to the pending notifications list,
 389  * and then wakes the waiting processes up.
 390  */
 391 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
 392                    u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
 393 {
 394         struct iwm_notif *notif;
 395
 396         notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
 397         if (!notif) {
 398                 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
 399                 return -ENOMEM;
 400         }
 401
 402         INIT_LIST_HEAD(&notif->pending);
 403         notif->cmd = cmd;
 404         notif->cmd_id = cmd_id;
 405         notif->src = source;
 406         notif->buf = kzalloc(buf_size, GFP_KERNEL);
 407         if (!notif->buf) {
 408                 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
 409                 kfree(notif);
 410                 return -ENOMEM;
 411         }
 412         notif->buf_size = buf_size;
 413         memcpy(notif->buf, buf, buf_size);
 414         list_add_tail(&notif->pending, &iwm->pending_notif);
 415
 416         wake_up_interruptible(&iwm->notif_queue);
 417
 418         return 0;
 419 }
 420
 421 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
 422                                         u8 source)
 423 {
 424         struct iwm_notif *notif, *next;
 425
 426         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 427                 if ((notif->cmd_id == cmd) && (notif->src == source)) {
 428                         list_del(&notif->pending);
 429                         return notif;
 430                 }
 431         }
 432
 433         return NULL;
 434 }
 435
 436 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
 437                                         u8 source, long timeout)
 438 {
 439         int ret;
 440         struct iwm_notif *notif;
 441         unsigned long *map = NULL;
 442
 443         switch (source) {
 444         case IWM_SRC_LMAC:
 445                 map = &iwm->lmac_handler_map[0];
 446                 break;
 447         case IWM_SRC_UMAC:
 448                 map = &iwm->umac_handler_map[0];
 449                 break;
 450         case IWM_SRC_UDMA:
 451                 map = &iwm->udma_handler_map[0];
 452                 break;
 453         }
 454
 455         set_bit(cmd, map);
 456
 457         ret = wait_event_interruptible_timeout(iwm->notif_queue,
 458                          ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
 459                                                timeout);
 460         clear_bit(cmd, map);
 461
 462         if (!ret)
 463                 return NULL;
 464
 465         return notif;
 466 }
 467
 468 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
 469 {
 470         int ret;
 471         struct iwm_notif *notif;
 472
 473         notif = iwm_notif_wait(iwm, cmd, source, timeout);
 474         if (!notif)
 475                 return -ETIME;
 476
 477         ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
 478         kfree(notif->buf);
 479         kfree(notif);
 480
 481         return ret;
 482 }
 483
 484 static int iwm_config_boot_params(struct iwm_priv *iwm)
 485 {
 486         struct iwm_udma_nonwifi_cmd target_cmd;
 487         int ret;
 488
 489         /* check Wimax is off and config debug monitor */
 490         if (iwm->conf.wimax_not_present) {
 491                 u32 data1 = 0x1f;
 492                 u32 addr1 = 0x606BE258;
 493
 494                 u32 data2_set = 0x0;
 495                 u32 data2_clr = 0x1;
 496                 u32 addr2 = 0x606BE100;
 497
 498                 u32 data3 = 0x1;
 499                 u32 addr3 = 0x606BEC00;
 500
 501                 target_cmd.resp = 0;
 502                 target_cmd.handle_by_hw = 0;
 503                 target_cmd.eop = 1;
 504
 505                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 506                 target_cmd.addr = cpu_to_le32(addr1);
 507                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 508                 target_cmd.op2 = 0;
 509
 510                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 511                 if (ret < 0) {
 512                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 513                         return ret;
 514                 }
 515
 516                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
 517                 target_cmd.addr = cpu_to_le32(addr2);
 518                 target_cmd.op1_sz = cpu_to_le32(data2_set);
 519                 target_cmd.op2 = cpu_to_le32(data2_clr);
 520
 521                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 522                 if (ret < 0) {
 523                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 524                         return ret;
 525                 }
 526
 527                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 528                 target_cmd.addr = cpu_to_le32(addr3);
 529                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 530                 target_cmd.op2 = 0;
 531
 532                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
 533                 if (ret < 0) {
 534                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 535                         return ret;
 536                 }
 537         }
 538
 539         return 0;
 540 }
 541
 542 void iwm_init_default_profile(struct iwm_priv *iwm,
 543                               struct iwm_umac_profile *profile)
 544 {
 545         memset(profile, 0, sizeof(struct iwm_umac_profile));
 546
 547         profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
 548         profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
 549         profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
 550         profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
 551
 552         if (iwm->conf.enable_qos)
 553                 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
 554
 555         profile->wireless_mode = iwm->conf.wireless_mode;
 556         profile->mode = cpu_to_le32(iwm->conf.mode);
 557
 558         profile->ibss.atim = 0;
 559         profile->ibss.beacon_interval = 100;
 560         profile->ibss.join_only = 0;
 561         profile->ibss.band = iwm->conf.ibss_band;
 562         profile->ibss.channel = iwm->conf.ibss_channel;
 563 }
 564
 565 void iwm_link_on(struct iwm_priv *iwm)
 566 {
 567         netif_carrier_on(iwm_to_ndev(iwm));
 568         netif_tx_wake_all_queues(iwm_to_ndev(iwm));
 569
 570         iwm_send_umac_stats_req(iwm, 0);
 571 }
 572
 573 void iwm_link_off(struct iwm_priv *iwm)
 574 {
 575         struct iw_statistics *wstats = &iwm->wstats;
 576         int i;
 577
 578         netif_tx_stop_all_queues(iwm_to_ndev(iwm));
 579         netif_carrier_off(iwm_to_ndev(iwm));
 580
 581         for (i = 0; i < IWM_TX_QUEUES; i++) {
 582                 skb_queue_purge(&iwm->txq[i].queue);
 583                 skb_queue_purge(&iwm->txq[i].stopped_queue);
 584
 585                 iwm->txq[i].concat_count = 0;
 586                 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
 587
 588                 flush_workqueue(iwm->txq[i].wq);
 589         }
 590
 591         iwm_rx_free(iwm);
 592
 593         cancel_delayed_work_sync(&iwm->stats_request);
 594         memset(wstats, 0, sizeof(struct iw_statistics));
 595         wstats->qual.updated = IW_QUAL_ALL_INVALID;
 596
 597         kfree(iwm->req_ie);
 598         iwm->req_ie = NULL;
 599         iwm->req_ie_len = 0;
 600         kfree(iwm->resp_ie);
 601         iwm->resp_ie = NULL;
 602         iwm->resp_ie_len = 0;
 603
 604         del_timer_sync(&iwm->watchdog);
 605 }
 606
 607 static void iwm_bss_list_clean(struct iwm_priv *iwm)
 608 {
 609         struct iwm_bss_info *bss, *next;
 610
 611         list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
 612                 list_del(&bss->node);
 613                 kfree(bss->bss);
 614                 kfree(bss);
 615         }
 616 }
 617
 618 static int iwm_channels_init(struct iwm_priv *iwm)
 619 {
 620         int ret;
 621
 622         ret = iwm_send_umac_channel_list(iwm);
 623         if (ret) {
 624                 IWM_ERR(iwm, "Send channel list failed\n");
 625                 return ret;
 626         }
 627
 628         ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
 629                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 630         if (ret) {
 631                 IWM_ERR(iwm, "Didn't get a channel list notification\n");
 632                 return ret;
 633         }
 634
 635         return 0;
 636 }
 637
 638 static int __iwm_up(struct iwm_priv *iwm)
 639 {
 640         int ret;
 641         struct iwm_notif *notif_reboot, *notif_ack = NULL;
 642         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 643         u32 wireless_mode;
 644
 645         ret = iwm_bus_enable(iwm);
 646         if (ret) {
 647                 IWM_ERR(iwm, "Couldn't enable function\n");
 648                 return ret;
 649         }
 650
 651         iwm_rx_setup_handlers(iwm);
 652
 653         /* Wait for initial BARKER_REBOOT from hardware */
 654         notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
 655                                       IWM_SRC_UDMA, 2 * HZ);
 656         if (!notif_reboot) {
 657                 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
 658                 goto err_disable;
 659         }
 660
 661         /* We send the barker back */
 662         ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
 663         if (ret) {
 664                 IWM_ERR(iwm, "REBOOT barker response failed\n");
 665                 kfree(notif_reboot);
 666                 goto err_disable;
 667         }
 668
 669         kfree(notif_reboot->buf);
 670         kfree(notif_reboot);
 671
 672         /* Wait for ACK_BARKER from hardware */
 673         notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
 674                                    IWM_SRC_UDMA, 2 * HZ);
 675         if (!notif_ack) {
 676                 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
 677                 goto err_disable;
 678         }
 679
 680         kfree(notif_ack->buf);
 681         kfree(notif_ack);
 682
 683         /* We start to config static boot parameters */
 684         ret = iwm_config_boot_params(iwm);
 685         if (ret) {
 686                 IWM_ERR(iwm, "Config boot parameters failed\n");
 687                 goto err_disable;
 688         }
 689
 690         ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
 691         if (ret) {
 692                 IWM_ERR(iwm, "MAC reading failed\n");
 693                 goto err_disable;
 694         }
 695         memcpy(iwm_to_ndev(iwm)->perm_addr, iwm_to_ndev(iwm)->dev_addr,
 696                 ETH_ALEN);
 697
 698         /* We can load the FWs */
 699         ret = iwm_load_fw(iwm);
 700         if (ret) {
 701                 IWM_ERR(iwm, "FW loading failed\n");
 702                 goto err_disable;
 703         }
 704
 705         ret = iwm_eeprom_fat_channels(iwm);
 706         if (ret) {
 707                 IWM_ERR(iwm, "Couldnt read HT channels EEPROM entries\n");
 708                 goto err_fw;
 709         }
 710
 711         /*
 712          * Read our SKU capabilities.
 713          * If it's valid, we AND the configured wireless mode with the
 714          * device EEPROM value as the current profile wireless mode.
 715          */
 716         wireless_mode = iwm_eeprom_wireless_mode(iwm);
 717         if (wireless_mode) {
 718                 iwm->conf.wireless_mode &= wireless_mode;
 719                 if (iwm->umac_profile)
 720                         iwm->umac_profile->wireless_mode =
 721                                         iwm->conf.wireless_mode;
 722         } else
 723                 IWM_ERR(iwm, "Wrong SKU capabilities: 0x%x\n",
 724                         *((u16 *)iwm_eeprom_access(iwm, IWM_EEPROM_SKU_CAP)));
 725
 726         snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "L%s_U%s",
 727                  iwm->lmac_version, iwm->umac_version);
 728
 729         /* We configure the UMAC and enable the wifi module */
 730         ret = iwm_send_umac_config(iwm,
 731                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
 732                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
 733                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
 734         if (ret) {
 735                 IWM_ERR(iwm, "UMAC config failed\n");
 736                 goto err_fw;
 737         }
 738
 739         ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 740                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 741         if (ret) {
 742                 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
 743                 goto err_fw;
 744         }
 745
 746         if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 747                                   UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 748                 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
 749                              iwm->core_enabled);
 750                 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 751                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 752                 if (ret) {
 753                         IWM_ERR(iwm, "Didn't get a core status notification\n");
 754                         goto err_fw;
 755                 }
 756
 757                 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 758                                           UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 759                         IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
 760                                 iwm->core_enabled);
 761                         goto err_fw;
 762                 } else {
 763                         IWM_INFO(iwm, "All cores enabled\n");
 764                 }
 765         }
 766
 767         ret = iwm_channels_init(iwm);
 768         if (ret < 0) {
 769                 IWM_ERR(iwm, "Couldn't init channels\n");
 770                 goto err_fw;
 771         }
 772
 773         /* Set the READY bit to indicate interface is brought up successfully */
 774         set_bit(IWM_STATUS_READY, &iwm->status);
 775
 776         return 0;
 777
 778  err_fw:
 779         iwm_eeprom_exit(iwm);
 780
 781  err_disable:
 782         ret = iwm_bus_disable(iwm);
 783         if (ret < 0)
 784                 IWM_ERR(iwm, "Couldn't disable function\n");
 785
 786         return -EIO;
 787 }
 788
 789 int iwm_up(struct iwm_priv *iwm)
 790 {
 791         int ret;
 792
 793         mutex_lock(&iwm->mutex);
 794         ret = __iwm_up(iwm);
 795         mutex_unlock(&iwm->mutex);
 796
 797         return ret;
 798 }
 799
 800 static int __iwm_down(struct iwm_priv *iwm)
 801 {
 802         int ret;
 803
 804         /* The interface is already down */
 805         if (!test_bit(IWM_STATUS_READY, &iwm->status))
 806                 return 0;
 807
 808         if (iwm->scan_request) {
 809                 cfg80211_scan_done(iwm->scan_request, true);
 810                 iwm->scan_request = NULL;
 811         }
 812
 813         clear_bit(IWM_STATUS_READY, &iwm->status);
 814
 815         iwm_eeprom_exit(iwm);
 816         iwm_bss_list_clean(iwm);
 817         iwm_init_default_profile(iwm, iwm->umac_profile);
 818         iwm->umac_profile_active = false;
 819         iwm->default_key = -1;
 820         iwm->core_enabled = 0;
 821
 822         ret = iwm_bus_disable(iwm);
 823         if (ret < 0) {
 824                 IWM_ERR(iwm, "Couldn't disable function\n");
 825                 return ret;
 826         }
 827
 828         return 0;
 829 }
 830
 831 int iwm_down(struct iwm_priv *iwm)
 832 {
 833         int ret;
 834
 835         mutex_lock(&iwm->mutex);
 836         ret = __iwm_down(iwm);
 837         mutex_unlock(&iwm->mutex);
 838
 839         return ret;
 840 }