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