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         .coexist_mode           = COEX_MODE_CM,
  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;
 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         }
 295
 296         for (i = 0; i < IWM_NUM_KEYS; i++)
 297                 memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
 298
 299         iwm->default_key = -1;
 300
 301         init_timer(&iwm->watchdog);
 302         iwm->watchdog.function = iwm_watchdog;
 303         iwm->watchdog.data = (unsigned long)iwm;
 304         mutex_init(&iwm->mutex);
 305
 306         iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
 307                                    GFP_KERNEL);
 308         if (iwm->last_fw_err == NULL)
 309                 return -ENOMEM;
 310
 311         return 0;
 312 }
 313
 314 void iwm_priv_deinit(struct iwm_priv *iwm)
 315 {
 316         int i;
 317
 318         for (i = 0; i < IWM_TX_QUEUES; i++)
 319                 destroy_workqueue(iwm->txq[i].wq);
 320
 321         destroy_workqueue(iwm->rx_wq);
 322         kfree(iwm->last_fw_err);
 323 }
 324
 325 /*
 326  * We reset all the structures, and we reset the UMAC.
 327  * After calling this routine, you're expected to reload
 328  * the firmware.
 329  */
 330 void iwm_reset(struct iwm_priv *iwm)
 331 {
 332         struct iwm_notif *notif, *next;
 333
 334         if (test_bit(IWM_STATUS_READY, &iwm->status))
 335                 iwm_target_reset(iwm);
 336
 337         if (test_bit(IWM_STATUS_RESETTING, &iwm->status)) {
 338                 iwm->status = 0;
 339                 set_bit(IWM_STATUS_RESETTING, &iwm->status);
 340         } else
 341                 iwm->status = 0;
 342         iwm->scan_id = 1;
 343
 344         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 345                 list_del(&notif->pending);
 346                 kfree(notif->buf);
 347                 kfree(notif);
 348         }
 349
 350         iwm_cmd_flush(iwm);
 351
 352         flush_workqueue(iwm->rx_wq);
 353
 354         iwm_link_off(iwm);
 355 }
 356
 357 void iwm_resetting(struct iwm_priv *iwm)
 358 {
 359         set_bit(IWM_STATUS_RESETTING, &iwm->status);
 360
 361         schedule_work(&iwm->reset_worker);
 362 }
 363
 364 /*
 365  * Notification code:
 366  *
 367  * We're faced with the following issue: Any host command can
 368  * have an answer or not, and if there's an answer to expect,
 369  * it can be treated synchronously or asynchronously.
 370  * To work around the synchronous answer case, we implemented
 371  * our notification mechanism.
 372  * When a code path needs to wait for a command response
 373  * synchronously, it calls notif_handle(), which waits for the
 374  * right notification to show up, and then process it. Before
 375  * starting to wait, it registered as a waiter for this specific
 376  * answer (by toggling a bit in on of the handler_map), so that
 377  * the rx code knows that it needs to send a notification to the
 378  * waiting processes. It does so by calling iwm_notif_send(),
 379  * which adds the notification to the pending notifications list,
 380  * and then wakes the waiting processes up.
 381  */
 382 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
 383                    u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
 384 {
 385         struct iwm_notif *notif;
 386
 387         notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
 388         if (!notif) {
 389                 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
 390                 return -ENOMEM;
 391         }
 392
 393         INIT_LIST_HEAD(&notif->pending);
 394         notif->cmd = cmd;
 395         notif->cmd_id = cmd_id;
 396         notif->src = source;
 397         notif->buf = kzalloc(buf_size, GFP_KERNEL);
 398         if (!notif->buf) {
 399                 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
 400                 kfree(notif);
 401                 return -ENOMEM;
 402         }
 403         notif->buf_size = buf_size;
 404         memcpy(notif->buf, buf, buf_size);
 405         list_add_tail(&notif->pending, &iwm->pending_notif);
 406
 407         wake_up_interruptible(&iwm->notif_queue);
 408
 409         return 0;
 410 }
 411
 412 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
 413                                         u8 source)
 414 {
 415         struct iwm_notif *notif, *next;
 416
 417         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 418                 if ((notif->cmd_id == cmd) && (notif->src == source)) {
 419                         list_del(&notif->pending);
 420                         return notif;
 421                 }
 422         }
 423
 424         return NULL;
 425 }
 426
 427 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
 428                                         u8 source, long timeout)
 429 {
 430         int ret;
 431         struct iwm_notif *notif;
 432         unsigned long *map = NULL;
 433
 434         switch (source) {
 435         case IWM_SRC_LMAC:
 436                 map = &iwm->lmac_handler_map[0];
 437                 break;
 438         case IWM_SRC_UMAC:
 439                 map = &iwm->umac_handler_map[0];
 440                 break;
 441         case IWM_SRC_UDMA:
 442                 map = &iwm->udma_handler_map[0];
 443                 break;
 444         }
 445
 446         set_bit(cmd, map);
 447
 448         ret = wait_event_interruptible_timeout(iwm->notif_queue,
 449                          ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
 450                                                timeout);
 451         clear_bit(cmd, map);
 452
 453         if (!ret)
 454                 return NULL;
 455
 456         return notif;
 457 }
 458
 459 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
 460 {
 461         int ret;
 462         struct iwm_notif *notif;
 463
 464         notif = iwm_notif_wait(iwm, cmd, source, timeout);
 465         if (!notif)
 466                 return -ETIME;
 467
 468         ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
 469         kfree(notif->buf);
 470         kfree(notif);
 471
 472         return ret;
 473 }
 474
 475 static int iwm_config_boot_params(struct iwm_priv *iwm)
 476 {
 477         struct iwm_udma_nonwifi_cmd target_cmd;
 478         int ret;
 479
 480         /* check Wimax is off and config debug monitor */
 481         if (iwm->conf.wimax_not_present) {
 482                 u32 data1 = 0x1f;
 483                 u32 addr1 = 0x606BE258;
 484
 485                 u32 data2_set = 0x0;
 486                 u32 data2_clr = 0x1;
 487                 u32 addr2 = 0x606BE100;
 488
 489                 u32 data3 = 0x1;
 490                 u32 addr3 = 0x606BEC00;
 491
 492                 target_cmd.resp = 0;
 493                 target_cmd.handle_by_hw = 0;
 494                 target_cmd.eop = 1;
 495
 496                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 497                 target_cmd.addr = cpu_to_le32(addr1);
 498                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 499                 target_cmd.op2 = 0;
 500
 501                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 502                 if (ret < 0) {
 503                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 504                         return ret;
 505                 }
 506
 507                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
 508                 target_cmd.addr = cpu_to_le32(addr2);
 509                 target_cmd.op1_sz = cpu_to_le32(data2_set);
 510                 target_cmd.op2 = cpu_to_le32(data2_clr);
 511
 512                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 513                 if (ret < 0) {
 514                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 515                         return ret;
 516                 }
 517
 518                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 519                 target_cmd.addr = cpu_to_le32(addr3);
 520                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 521                 target_cmd.op2 = 0;
 522
 523                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
 524                 if (ret < 0) {
 525                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 526                         return ret;
 527                 }
 528         }
 529
 530         return 0;
 531 }
 532
 533 void iwm_init_default_profile(struct iwm_priv *iwm,
 534                               struct iwm_umac_profile *profile)
 535 {
 536         memset(profile, 0, sizeof(struct iwm_umac_profile));
 537
 538         profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
 539         profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
 540         profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
 541         profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
 542
 543         if (iwm->conf.enable_qos)
 544                 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
 545
 546         profile->wireless_mode = iwm->conf.wireless_mode;
 547         profile->mode = cpu_to_le32(iwm->conf.mode);
 548
 549         profile->ibss.atim = 0;
 550         profile->ibss.beacon_interval = 100;
 551         profile->ibss.join_only = 0;
 552         profile->ibss.band = iwm->conf.ibss_band;
 553         profile->ibss.channel = iwm->conf.ibss_channel;
 554 }
 555
 556 void iwm_link_on(struct iwm_priv *iwm)
 557 {
 558         netif_carrier_on(iwm_to_ndev(iwm));
 559         netif_tx_wake_all_queues(iwm_to_ndev(iwm));
 560
 561         iwm_send_umac_stats_req(iwm, 0);
 562 }
 563
 564 void iwm_link_off(struct iwm_priv *iwm)
 565 {
 566         struct iw_statistics *wstats = &iwm->wstats;
 567         int i;
 568
 569         netif_tx_stop_all_queues(iwm_to_ndev(iwm));
 570         netif_carrier_off(iwm_to_ndev(iwm));
 571
 572         for (i = 0; i < IWM_TX_QUEUES; i++) {
 573                 skb_queue_purge(&iwm->txq[i].queue);
 574
 575                 iwm->txq[i].concat_count = 0;
 576                 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
 577
 578                 flush_workqueue(iwm->txq[i].wq);
 579         }
 580
 581         iwm_rx_free(iwm);
 582
 583         cancel_delayed_work_sync(&iwm->stats_request);
 584         memset(wstats, 0, sizeof(struct iw_statistics));
 585         wstats->qual.updated = IW_QUAL_ALL_INVALID;
 586
 587         kfree(iwm->req_ie);
 588         iwm->req_ie = NULL;
 589         iwm->req_ie_len = 0;
 590         kfree(iwm->resp_ie);
 591         iwm->resp_ie = NULL;
 592         iwm->resp_ie_len = 0;
 593
 594         del_timer_sync(&iwm->watchdog);
 595 }
 596
 597 static void iwm_bss_list_clean(struct iwm_priv *iwm)
 598 {
 599         struct iwm_bss_info *bss, *next;
 600
 601         list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
 602                 list_del(&bss->node);
 603                 kfree(bss->bss);
 604                 kfree(bss);
 605         }
 606 }
 607
 608 static int iwm_channels_init(struct iwm_priv *iwm)
 609 {
 610         int ret;
 611
 612         ret = iwm_send_umac_channel_list(iwm);
 613         if (ret) {
 614                 IWM_ERR(iwm, "Send channel list failed\n");
 615                 return ret;
 616         }
 617
 618         ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
 619                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 620         if (ret) {
 621                 IWM_ERR(iwm, "Didn't get a channel list notification\n");
 622                 return ret;
 623         }
 624
 625         return 0;
 626 }
 627
 628 static int __iwm_up(struct iwm_priv *iwm)
 629 {
 630         int ret;
 631         struct iwm_notif *notif_reboot, *notif_ack = NULL;
 632         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 633
 634         ret = iwm_bus_enable(iwm);
 635         if (ret) {
 636                 IWM_ERR(iwm, "Couldn't enable function\n");
 637                 return ret;
 638         }
 639
 640         iwm_rx_setup_handlers(iwm);
 641
 642         /* Wait for initial BARKER_REBOOT from hardware */
 643         notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
 644                                       IWM_SRC_UDMA, 2 * HZ);
 645         if (!notif_reboot) {
 646                 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
 647                 goto err_disable;
 648         }
 649
 650         /* We send the barker back */
 651         ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
 652         if (ret) {
 653                 IWM_ERR(iwm, "REBOOT barker response failed\n");
 654                 kfree(notif_reboot);
 655                 goto err_disable;
 656         }
 657
 658         kfree(notif_reboot->buf);
 659         kfree(notif_reboot);
 660
 661         /* Wait for ACK_BARKER from hardware */
 662         notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
 663                                    IWM_SRC_UDMA, 2 * HZ);
 664         if (!notif_ack) {
 665                 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
 666                 goto err_disable;
 667         }
 668
 669         kfree(notif_ack->buf);
 670         kfree(notif_ack);
 671
 672         /* We start to config static boot parameters */
 673         ret = iwm_config_boot_params(iwm);
 674         if (ret) {
 675                 IWM_ERR(iwm, "Config boot parameters failed\n");
 676                 goto err_disable;
 677         }
 678
 679         ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
 680         if (ret) {
 681                 IWM_ERR(iwm, "MAC reading failed\n");
 682                 goto err_disable;
 683         }
 684         memcpy(iwm_to_ndev(iwm)->perm_addr, iwm_to_ndev(iwm)->dev_addr,
 685                 ETH_ALEN);
 686
 687         /* We can load the FWs */
 688         ret = iwm_load_fw(iwm);
 689         if (ret) {
 690                 IWM_ERR(iwm, "FW loading failed\n");
 691                 goto err_disable;
 692         }
 693
 694         snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "L%s_U%s",
 695                  iwm->lmac_version, iwm->umac_version);
 696
 697         /* We configure the UMAC and enable the wifi module */
 698         ret = iwm_send_umac_config(iwm,
 699                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
 700                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
 701                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
 702         if (ret) {
 703                 IWM_ERR(iwm, "UMAC config failed\n");
 704                 goto err_fw;
 705         }
 706
 707         ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 708                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 709         if (ret) {
 710                 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
 711                 goto err_fw;
 712         }
 713
 714         if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 715                                   UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 716                 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
 717                              iwm->core_enabled);
 718                 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 719                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 720                 if (ret) {
 721                         IWM_ERR(iwm, "Didn't get a core status notification\n");
 722                         goto err_fw;
 723                 }
 724
 725                 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 726                                           UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 727                         IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
 728                                 iwm->core_enabled);
 729                         goto err_fw;
 730                 } else {
 731                         IWM_INFO(iwm, "All cores enabled\n");
 732                 }
 733         }
 734
 735         ret = iwm_channels_init(iwm);
 736         if (ret < 0) {
 737                 IWM_ERR(iwm, "Couldn't init channels\n");
 738                 goto err_fw;
 739         }
 740
 741         /* Set the READY bit to indicate interface is brought up successfully */
 742         set_bit(IWM_STATUS_READY, &iwm->status);
 743
 744         return 0;
 745
 746  err_fw:
 747         iwm_eeprom_exit(iwm);
 748
 749  err_disable:
 750         ret = iwm_bus_disable(iwm);
 751         if (ret < 0)
 752                 IWM_ERR(iwm, "Couldn't disable function\n");
 753
 754         return -EIO;
 755 }
 756
 757 int iwm_up(struct iwm_priv *iwm)
 758 {
 759         int ret;
 760
 761         mutex_lock(&iwm->mutex);
 762         ret = __iwm_up(iwm);
 763         mutex_unlock(&iwm->mutex);
 764
 765         return ret;
 766 }
 767
 768 static int __iwm_down(struct iwm_priv *iwm)
 769 {
 770         int ret;
 771
 772         /* The interface is already down */
 773         if (!test_bit(IWM_STATUS_READY, &iwm->status))
 774                 return 0;
 775
 776         if (iwm->scan_request) {
 777                 cfg80211_scan_done(iwm->scan_request, true);
 778                 iwm->scan_request = NULL;
 779         }
 780
 781         clear_bit(IWM_STATUS_READY, &iwm->status);
 782
 783         iwm_eeprom_exit(iwm);
 784         iwm_bss_list_clean(iwm);
 785         iwm_init_default_profile(iwm, iwm->umac_profile);
 786         iwm->umac_profile_active = false;
 787         iwm->default_key = -1;
 788         iwm->core_enabled = 0;
 789
 790         ret = iwm_bus_disable(iwm);
 791         if (ret < 0) {
 792                 IWM_ERR(iwm, "Couldn't disable function\n");
 793                 return ret;
 794         }
 795
 796         return 0;
 797 }
 798
 799 int iwm_down(struct iwm_priv *iwm)
 800 {
 801         int ret;
 802
 803         mutex_lock(&iwm->mutex);
 804         ret = __iwm_down(iwm);
 805         mutex_unlock(&iwm->mutex);
 806
 807         return ret;
 808 }