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;
 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         }
 296
 297         for (i = 0; i < IWM_NUM_KEYS; i++)
 298                 memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
 299
 300         iwm->default_key = -1;
 301
 302         init_timer(&iwm->watchdog);
 303         iwm->watchdog.function = iwm_watchdog;
 304         iwm->watchdog.data = (unsigned long)iwm;
 305         mutex_init(&iwm->mutex);
 306
 307         iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
 308                                    GFP_KERNEL);
 309         if (iwm->last_fw_err == NULL)
 310                 return -ENOMEM;
 311
 312         return 0;
 313 }
 314
 315 void iwm_priv_deinit(struct iwm_priv *iwm)
 316 {
 317         int i;
 318
 319         for (i = 0; i < IWM_TX_QUEUES; i++)
 320                 destroy_workqueue(iwm->txq[i].wq);
 321
 322         destroy_workqueue(iwm->rx_wq);
 323         kfree(iwm->last_fw_err);
 324 }
 325
 326 /*
 327  * We reset all the structures, and we reset the UMAC.
 328  * After calling this routine, you're expected to reload
 329  * the firmware.
 330  */
 331 void iwm_reset(struct iwm_priv *iwm)
 332 {
 333         struct iwm_notif *notif, *next;
 334
 335         if (test_bit(IWM_STATUS_READY, &iwm->status))
 336                 iwm_target_reset(iwm);
 337
 338         if (test_bit(IWM_STATUS_RESETTING, &iwm->status)) {
 339                 iwm->status = 0;
 340                 set_bit(IWM_STATUS_RESETTING, &iwm->status);
 341         } else
 342                 iwm->status = 0;
 343         iwm->scan_id = 1;
 344
 345         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 346                 list_del(&notif->pending);
 347                 kfree(notif->buf);
 348                 kfree(notif);
 349         }
 350
 351         iwm_cmd_flush(iwm);
 352
 353         flush_workqueue(iwm->rx_wq);
 354
 355         iwm_link_off(iwm);
 356 }
 357
 358 void iwm_resetting(struct iwm_priv *iwm)
 359 {
 360         set_bit(IWM_STATUS_RESETTING, &iwm->status);
 361
 362         schedule_work(&iwm->reset_worker);
 363 }
 364
 365 /*
 366  * Notification code:
 367  *
 368  * We're faced with the following issue: Any host command can
 369  * have an answer or not, and if there's an answer to expect,
 370  * it can be treated synchronously or asynchronously.
 371  * To work around the synchronous answer case, we implemented
 372  * our notification mechanism.
 373  * When a code path needs to wait for a command response
 374  * synchronously, it calls notif_handle(), which waits for the
 375  * right notification to show up, and then process it. Before
 376  * starting to wait, it registered as a waiter for this specific
 377  * answer (by toggling a bit in on of the handler_map), so that
 378  * the rx code knows that it needs to send a notification to the
 379  * waiting processes. It does so by calling iwm_notif_send(),
 380  * which adds the notification to the pending notifications list,
 381  * and then wakes the waiting processes up.
 382  */
 383 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
 384                    u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
 385 {
 386         struct iwm_notif *notif;
 387
 388         notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
 389         if (!notif) {
 390                 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
 391                 return -ENOMEM;
 392         }
 393
 394         INIT_LIST_HEAD(&notif->pending);
 395         notif->cmd = cmd;
 396         notif->cmd_id = cmd_id;
 397         notif->src = source;
 398         notif->buf = kzalloc(buf_size, GFP_KERNEL);
 399         if (!notif->buf) {
 400                 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
 401                 kfree(notif);
 402                 return -ENOMEM;
 403         }
 404         notif->buf_size = buf_size;
 405         memcpy(notif->buf, buf, buf_size);
 406         list_add_tail(&notif->pending, &iwm->pending_notif);
 407
 408         wake_up_interruptible(&iwm->notif_queue);
 409
 410         return 0;
 411 }
 412
 413 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
 414                                         u8 source)
 415 {
 416         struct iwm_notif *notif, *next;
 417
 418         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 419                 if ((notif->cmd_id == cmd) && (notif->src == source)) {
 420                         list_del(&notif->pending);
 421                         return notif;
 422                 }
 423         }
 424
 425         return NULL;
 426 }
 427
 428 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
 429                                         u8 source, long timeout)
 430 {
 431         int ret;
 432         struct iwm_notif *notif;
 433         unsigned long *map = NULL;
 434
 435         switch (source) {
 436         case IWM_SRC_LMAC:
 437                 map = &iwm->lmac_handler_map[0];
 438                 break;
 439         case IWM_SRC_UMAC:
 440                 map = &iwm->umac_handler_map[0];
 441                 break;
 442         case IWM_SRC_UDMA:
 443                 map = &iwm->udma_handler_map[0];
 444                 break;
 445         }
 446
 447         set_bit(cmd, map);
 448
 449         ret = wait_event_interruptible_timeout(iwm->notif_queue,
 450                          ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
 451                                                timeout);
 452         clear_bit(cmd, map);
 453
 454         if (!ret)
 455                 return NULL;
 456
 457         return notif;
 458 }
 459
 460 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
 461 {
 462         int ret;
 463         struct iwm_notif *notif;
 464
 465         notif = iwm_notif_wait(iwm, cmd, source, timeout);
 466         if (!notif)
 467                 return -ETIME;
 468
 469         ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
 470         kfree(notif->buf);
 471         kfree(notif);
 472
 473         return ret;
 474 }
 475
 476 static int iwm_config_boot_params(struct iwm_priv *iwm)
 477 {
 478         struct iwm_udma_nonwifi_cmd target_cmd;
 479         int ret;
 480
 481         /* check Wimax is off and config debug monitor */
 482         if (iwm->conf.wimax_not_present) {
 483                 u32 data1 = 0x1f;
 484                 u32 addr1 = 0x606BE258;
 485
 486                 u32 data2_set = 0x0;
 487                 u32 data2_clr = 0x1;
 488                 u32 addr2 = 0x606BE100;
 489
 490                 u32 data3 = 0x1;
 491                 u32 addr3 = 0x606BEC00;
 492
 493                 target_cmd.resp = 0;
 494                 target_cmd.handle_by_hw = 0;
 495                 target_cmd.eop = 1;
 496
 497                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 498                 target_cmd.addr = cpu_to_le32(addr1);
 499                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 500                 target_cmd.op2 = 0;
 501
 502                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 503                 if (ret < 0) {
 504                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 505                         return ret;
 506                 }
 507
 508                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
 509                 target_cmd.addr = cpu_to_le32(addr2);
 510                 target_cmd.op1_sz = cpu_to_le32(data2_set);
 511                 target_cmd.op2 = cpu_to_le32(data2_clr);
 512
 513                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 514                 if (ret < 0) {
 515                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 516                         return ret;
 517                 }
 518
 519                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 520                 target_cmd.addr = cpu_to_le32(addr3);
 521                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 522                 target_cmd.op2 = 0;
 523
 524                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
 525                 if (ret < 0) {
 526                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 527                         return ret;
 528                 }
 529         }
 530
 531         return 0;
 532 }
 533
 534 void iwm_init_default_profile(struct iwm_priv *iwm,
 535                               struct iwm_umac_profile *profile)
 536 {
 537         memset(profile, 0, sizeof(struct iwm_umac_profile));
 538
 539         profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
 540         profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
 541         profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
 542         profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
 543
 544         if (iwm->conf.enable_qos)
 545                 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
 546
 547         profile->wireless_mode = iwm->conf.wireless_mode;
 548         profile->mode = cpu_to_le32(iwm->conf.mode);
 549
 550         profile->ibss.atim = 0;
 551         profile->ibss.beacon_interval = 100;
 552         profile->ibss.join_only = 0;
 553         profile->ibss.band = iwm->conf.ibss_band;
 554         profile->ibss.channel = iwm->conf.ibss_channel;
 555 }
 556
 557 void iwm_link_on(struct iwm_priv *iwm)
 558 {
 559         netif_carrier_on(iwm_to_ndev(iwm));
 560         netif_tx_wake_all_queues(iwm_to_ndev(iwm));
 561
 562         iwm_send_umac_stats_req(iwm, 0);
 563 }
 564
 565 void iwm_link_off(struct iwm_priv *iwm)
 566 {
 567         struct iw_statistics *wstats = &iwm->wstats;
 568         int i;
 569
 570         netif_tx_stop_all_queues(iwm_to_ndev(iwm));
 571         netif_carrier_off(iwm_to_ndev(iwm));
 572
 573         for (i = 0; i < IWM_TX_QUEUES; i++) {
 574                 skb_queue_purge(&iwm->txq[i].queue);
 575
 576                 iwm->txq[i].concat_count = 0;
 577                 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
 578
 579                 flush_workqueue(iwm->txq[i].wq);
 580         }
 581
 582         iwm_rx_free(iwm);
 583
 584         cancel_delayed_work_sync(&iwm->stats_request);
 585         memset(wstats, 0, sizeof(struct iw_statistics));
 586         wstats->qual.updated = IW_QUAL_ALL_INVALID;
 587
 588         kfree(iwm->req_ie);
 589         iwm->req_ie = NULL;
 590         iwm->req_ie_len = 0;
 591         kfree(iwm->resp_ie);
 592         iwm->resp_ie = NULL;
 593         iwm->resp_ie_len = 0;
 594
 595         del_timer_sync(&iwm->watchdog);
 596 }
 597
 598 static void iwm_bss_list_clean(struct iwm_priv *iwm)
 599 {
 600         struct iwm_bss_info *bss, *next;
 601
 602         list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
 603                 list_del(&bss->node);
 604                 kfree(bss->bss);
 605                 kfree(bss);
 606         }
 607 }
 608
 609 static int iwm_channels_init(struct iwm_priv *iwm)
 610 {
 611         int ret;
 612
 613         ret = iwm_send_umac_channel_list(iwm);
 614         if (ret) {
 615                 IWM_ERR(iwm, "Send channel list failed\n");
 616                 return ret;
 617         }
 618
 619         ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
 620                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 621         if (ret) {
 622                 IWM_ERR(iwm, "Didn't get a channel list notification\n");
 623                 return ret;
 624         }
 625
 626         return 0;
 627 }
 628
 629 static int __iwm_up(struct iwm_priv *iwm)
 630 {
 631         int ret;
 632         struct iwm_notif *notif_reboot, *notif_ack = NULL;
 633         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 634         u32 wireless_mode;
 635
 636         ret = iwm_bus_enable(iwm);
 637         if (ret) {
 638                 IWM_ERR(iwm, "Couldn't enable function\n");
 639                 return ret;
 640         }
 641
 642         iwm_rx_setup_handlers(iwm);
 643
 644         /* Wait for initial BARKER_REBOOT from hardware */
 645         notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
 646                                       IWM_SRC_UDMA, 2 * HZ);
 647         if (!notif_reboot) {
 648                 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
 649                 goto err_disable;
 650         }
 651
 652         /* We send the barker back */
 653         ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
 654         if (ret) {
 655                 IWM_ERR(iwm, "REBOOT barker response failed\n");
 656                 kfree(notif_reboot);
 657                 goto err_disable;
 658         }
 659
 660         kfree(notif_reboot->buf);
 661         kfree(notif_reboot);
 662
 663         /* Wait for ACK_BARKER from hardware */
 664         notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
 665                                    IWM_SRC_UDMA, 2 * HZ);
 666         if (!notif_ack) {
 667                 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
 668                 goto err_disable;
 669         }
 670
 671         kfree(notif_ack->buf);
 672         kfree(notif_ack);
 673
 674         /* We start to config static boot parameters */
 675         ret = iwm_config_boot_params(iwm);
 676         if (ret) {
 677                 IWM_ERR(iwm, "Config boot parameters failed\n");
 678                 goto err_disable;
 679         }
 680
 681         ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
 682         if (ret) {
 683                 IWM_ERR(iwm, "MAC reading failed\n");
 684                 goto err_disable;
 685         }
 686         memcpy(iwm_to_ndev(iwm)->perm_addr, iwm_to_ndev(iwm)->dev_addr,
 687                 ETH_ALEN);
 688
 689         /* We can load the FWs */
 690         ret = iwm_load_fw(iwm);
 691         if (ret) {
 692                 IWM_ERR(iwm, "FW loading failed\n");
 693                 goto err_disable;
 694         }
 695
 696         ret = iwm_eeprom_fat_channels(iwm);
 697         if (ret) {
 698                 IWM_ERR(iwm, "Couldnt read HT channels EEPROM entries\n");
 699                 goto err_fw;
 700         }
 701
 702         /*
 703          * Read our SKU capabilities.
 704          * If it's valid, we AND the configured wireless mode with the
 705          * device EEPROM value as the current profile wireless mode.
 706          */
 707         wireless_mode = iwm_eeprom_wireless_mode(iwm);
 708         if (wireless_mode) {
 709                 iwm->conf.wireless_mode &= wireless_mode;
 710                 if (iwm->umac_profile)
 711                         iwm->umac_profile->wireless_mode =
 712                                         iwm->conf.wireless_mode;
 713         } else
 714                 IWM_ERR(iwm, "Wrong SKU capabilities: 0x%x\n",
 715                         *((u16 *)iwm_eeprom_access(iwm, IWM_EEPROM_SKU_CAP)));
 716
 717         snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "L%s_U%s",
 718                  iwm->lmac_version, iwm->umac_version);
 719
 720         /* We configure the UMAC and enable the wifi module */
 721         ret = iwm_send_umac_config(iwm,
 722                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
 723                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
 724                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
 725         if (ret) {
 726                 IWM_ERR(iwm, "UMAC config failed\n");
 727                 goto err_fw;
 728         }
 729
 730         ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 731                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 732         if (ret) {
 733                 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
 734                 goto err_fw;
 735         }
 736
 737         if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 738                                   UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 739                 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
 740                              iwm->core_enabled);
 741                 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 742                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 743                 if (ret) {
 744                         IWM_ERR(iwm, "Didn't get a core status notification\n");
 745                         goto err_fw;
 746                 }
 747
 748                 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 749                                           UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 750                         IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
 751                                 iwm->core_enabled);
 752                         goto err_fw;
 753                 } else {
 754                         IWM_INFO(iwm, "All cores enabled\n");
 755                 }
 756         }
 757
 758         ret = iwm_channels_init(iwm);
 759         if (ret < 0) {
 760                 IWM_ERR(iwm, "Couldn't init channels\n");
 761                 goto err_fw;
 762         }
 763
 764         /* Set the READY bit to indicate interface is brought up successfully */
 765         set_bit(IWM_STATUS_READY, &iwm->status);
 766
 767         return 0;
 768
 769  err_fw:
 770         iwm_eeprom_exit(iwm);
 771
 772  err_disable:
 773         ret = iwm_bus_disable(iwm);
 774         if (ret < 0)
 775                 IWM_ERR(iwm, "Couldn't disable function\n");
 776
 777         return -EIO;
 778 }
 779
 780 int iwm_up(struct iwm_priv *iwm)
 781 {
 782         int ret;
 783
 784         mutex_lock(&iwm->mutex);
 785         ret = __iwm_up(iwm);
 786         mutex_unlock(&iwm->mutex);
 787
 788         return ret;
 789 }
 790
 791 static int __iwm_down(struct iwm_priv *iwm)
 792 {
 793         int ret;
 794
 795         /* The interface is already down */
 796         if (!test_bit(IWM_STATUS_READY, &iwm->status))
 797                 return 0;
 798
 799         if (iwm->scan_request) {
 800                 cfg80211_scan_done(iwm->scan_request, true);
 801                 iwm->scan_request = NULL;
 802         }
 803
 804         clear_bit(IWM_STATUS_READY, &iwm->status);
 805
 806         iwm_eeprom_exit(iwm);
 807         iwm_bss_list_clean(iwm);
 808         iwm_init_default_profile(iwm, iwm->umac_profile);
 809         iwm->umac_profile_active = false;
 810         iwm->default_key = -1;
 811         iwm->core_enabled = 0;
 812
 813         ret = iwm_bus_disable(iwm);
 814         if (ret < 0) {
 815                 IWM_ERR(iwm, "Couldn't disable function\n");
 816                 return ret;
 817         }
 818
 819         return 0;
 820 }
 821
 822 int iwm_down(struct iwm_priv *iwm)
 823 {
 824         int ret;
 825
 826         mutex_lock(&iwm->mutex);
 827         ret = __iwm_down(iwm);
 828         mutex_unlock(&iwm->mutex);
 829
 830         return ret;
 831 }