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 #include <linux/slab.h>
  45 #include <linux/moduleparam.h>
  46
  47 #include "iwm.h"
  48 #include "debug.h"
  49 #include "bus.h"
  50 #include "umac.h"
  51 #include "commands.h"
  52 #include "hal.h"
  53 #include "fw.h"
  54 #include "rx.h"
  55
  56 static struct iwm_conf def_iwm_conf = {
  57
  58         .sdio_ior_timeout       = 5000,
  59         .calib_map              = BIT(CALIB_CFG_DC_IDX) |
  60                                   BIT(CALIB_CFG_LO_IDX) |
  61                                   BIT(CALIB_CFG_TX_IQ_IDX)      |
  62                                   BIT(CALIB_CFG_RX_IQ_IDX)      |
  63                                   BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
  64         .expected_calib_map     = BIT(PHY_CALIBRATE_DC_CMD)     |
  65                                   BIT(PHY_CALIBRATE_LO_CMD)     |
  66                                   BIT(PHY_CALIBRATE_TX_IQ_CMD)  |
  67                                   BIT(PHY_CALIBRATE_RX_IQ_CMD)  |
  68                                   BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
  69         .ct_kill_entry          = 110,
  70         .ct_kill_exit           = 110,
  71         .reset_on_fatal_err     = 1,
  72         .auto_connect           = 1,
  73         .enable_qos             = 1,
  74         .mode                   = UMAC_MODE_BSS,
  75
  76         /* UMAC configuration */
  77         .power_index            = 0,
  78         .frag_threshold         = IEEE80211_MAX_FRAG_THRESHOLD,
  79         .rts_threshold          = IEEE80211_MAX_RTS_THRESHOLD,
  80         .cts_to_self            = 0,
  81
  82         .assoc_timeout          = 2,
  83         .roam_timeout           = 10,
  84         .wireless_mode          = WIRELESS_MODE_11A | WIRELESS_MODE_11G |
  85                                   WIRELESS_MODE_11N,
  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 bool 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 static bool modparam_wimax_enable = true;
  99 module_param_named(wimax_enable, modparam_wimax_enable, bool, 0644);
 100 MODULE_PARM_DESC(wimax_enable, "Enable wimax core (default 1 [wimax enabled])");
 101
 102 int iwm_mode_to_nl80211_iftype(int mode)
 103 {
 104         switch (mode) {
 105         case UMAC_MODE_BSS:
 106                 return NL80211_IFTYPE_STATION;
 107         case UMAC_MODE_IBSS:
 108                 return NL80211_IFTYPE_ADHOC;
 109         default:
 110                 return NL80211_IFTYPE_UNSPECIFIED;
 111         }
 112
 113         return 0;
 114 }
 115
 116 static void iwm_statistics_request(struct work_struct *work)
 117 {
 118         struct iwm_priv *iwm =
 119                 container_of(work, struct iwm_priv, stats_request.work);
 120
 121         iwm_send_umac_stats_req(iwm, 0);
 122 }
 123
 124 static void iwm_disconnect_work(struct work_struct *work)
 125 {
 126         struct iwm_priv *iwm =
 127                 container_of(work, struct iwm_priv, disconnect.work);
 128
 129         if (iwm->umac_profile_active)
 130                 iwm_invalidate_mlme_profile(iwm);
 131
 132         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 133         iwm->umac_profile_active = false;
 134         memset(iwm->bssid, 0, ETH_ALEN);
 135         iwm->channel = 0;
 136
 137         iwm_link_off(iwm);
 138
 139         wake_up_interruptible(&iwm->mlme_queue);
 140
 141         cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0, GFP_KERNEL);
 142 }
 143
 144 static void iwm_ct_kill_work(struct work_struct *work)
 145 {
 146         struct iwm_priv *iwm =
 147                 container_of(work, struct iwm_priv, ct_kill_delay.work);
 148         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 149
 150         IWM_INFO(iwm, "CT kill delay timeout\n");
 151
 152         wiphy_rfkill_set_hw_state(wiphy, false);
 153 }
 154
 155 static int __iwm_up(struct iwm_priv *iwm);
 156 static int __iwm_down(struct iwm_priv *iwm);
 157
 158 static void iwm_reset_worker(struct work_struct *work)
 159 {
 160         struct iwm_priv *iwm;
 161         struct iwm_umac_profile *profile = NULL;
 162         int uninitialized_var(ret), retry = 0;
 163
 164         iwm = container_of(work, struct iwm_priv, reset_worker);
 165
 166         /*
 167          * XXX: The iwm->mutex is introduced purely for this reset work,
 168          * because the other users for iwm_up and iwm_down are only netdev
 169          * ndo_open and ndo_stop which are already protected by rtnl.
 170          * Please remove iwm->mutex together if iwm_reset_worker() is not
 171          * required in the future.
 172          */
 173         if (!mutex_trylock(&iwm->mutex)) {
 174                 IWM_WARN(iwm, "We are in the middle of interface bringing "
 175                          "UP/DOWN. Skip driver resetting.\n");
 176                 return;
 177         }
 178
 179         if (iwm->umac_profile_active) {
 180                 profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
 181                 if (profile)
 182                         memcpy(profile, iwm->umac_profile, sizeof(*profile));
 183                 else
 184                         IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
 185         }
 186
 187         __iwm_down(iwm);
 188
 189         while (retry++ < 3) {
 190                 ret = __iwm_up(iwm);
 191                 if (!ret)
 192                         break;
 193
 194                 schedule_timeout_uninterruptible(10 * HZ);
 195         }
 196
 197         if (ret) {
 198                 IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);
 199
 200                 kfree(profile);
 201                 goto out;
 202         }
 203
 204         if (profile) {
 205                 IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
 206                 memcpy(iwm->umac_profile, profile, sizeof(*profile));
 207                 iwm_send_mlme_profile(iwm);
 208                 kfree(profile);
 209         } else
 210                 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 211
 212  out:
 213         mutex_unlock(&iwm->mutex);
 214 }
 215
 216 static void iwm_auth_retry_worker(struct work_struct *work)
 217 {
 218         struct iwm_priv *iwm;
 219         int i, ret;
 220
 221         iwm = container_of(work, struct iwm_priv, auth_retry_worker);
 222         if (iwm->umac_profile_active) {
 223                 ret = iwm_invalidate_mlme_profile(iwm);
 224                 if (ret < 0)
 225                         return;
 226         }
 227
 228         iwm->umac_profile->sec.auth_type = UMAC_AUTH_TYPE_LEGACY_PSK;
 229
 230         ret = iwm_send_mlme_profile(iwm);
 231         if (ret < 0)
 232                 return;
 233
 234         for (i = 0; i < IWM_NUM_KEYS; i++)
 235                 if (iwm->keys[i].key_len)
 236                         iwm_set_key(iwm, 0, &iwm->keys[i]);
 237
 238         iwm_set_tx_key(iwm, iwm->default_key);
 239 }
 240
 241
 242
 243 static void iwm_watchdog(unsigned long data)
 244 {
 245         struct iwm_priv *iwm = (struct iwm_priv *)data;
 246
 247         IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");
 248
 249         if (modparam_reset)
 250                 iwm_resetting(iwm);
 251 }
 252
 253 int iwm_priv_init(struct iwm_priv *iwm)
 254 {
 255         int i, j;
 256         char name[32];
 257
 258         iwm->status = 0;
 259         INIT_LIST_HEAD(&iwm->pending_notif);
 260         init_waitqueue_head(&iwm->notif_queue);
 261         init_waitqueue_head(&iwm->nonwifi_queue);
 262         init_waitqueue_head(&iwm->wifi_ntfy_queue);
 263         init_waitqueue_head(&iwm->mlme_queue);
 264         memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
 265         spin_lock_init(&iwm->tx_credit.lock);
 266         INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
 267         INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
 268         iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
 269         iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
 270         spin_lock_init(&iwm->cmd_lock);
 271         iwm->scan_id = 1;
 272         INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
 273         INIT_DELAYED_WORK(&iwm->disconnect, iwm_disconnect_work);
 274         INIT_DELAYED_WORK(&iwm->ct_kill_delay, iwm_ct_kill_work);
 275         INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
 276         INIT_WORK(&iwm->auth_retry_worker, iwm_auth_retry_worker);
 277         INIT_LIST_HEAD(&iwm->bss_list);
 278
 279         skb_queue_head_init(&iwm->rx_list);
 280         INIT_LIST_HEAD(&iwm->rx_tickets);
 281         spin_lock_init(&iwm->ticket_lock);
 282         for (i = 0; i < IWM_RX_ID_HASH; i++) {
 283                 INIT_LIST_HEAD(&iwm->rx_packets[i]);
 284                 spin_lock_init(&iwm->packet_lock[i]);
 285         }
 286
 287         INIT_WORK(&iwm->rx_worker, iwm_rx_worker);
 288
 289         iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
 290         if (!iwm->rx_wq)
 291                 return -EAGAIN;
 292
 293         for (i = 0; i < IWM_TX_QUEUES; i++) {
 294                 INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
 295                 snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
 296                 iwm->txq[i].id = i;
 297                 iwm->txq[i].wq = create_singlethread_workqueue(name);
 298                 if (!iwm->txq[i].wq)
 299                         return -EAGAIN;
 300
 301                 skb_queue_head_init(&iwm->txq[i].queue);
 302                 skb_queue_head_init(&iwm->txq[i].stopped_queue);
 303                 spin_lock_init(&iwm->txq[i].lock);
 304         }
 305
 306         for (i = 0; i < IWM_NUM_KEYS; i++)
 307                 memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
 308
 309         iwm->default_key = -1;
 310
 311         for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 312                 for (j = 0; j < IWM_UMAC_TID_NR; j++) {
 313                         mutex_init(&iwm->sta_table[i].tid_info[j].mutex);
 314                         iwm->sta_table[i].tid_info[j].stopped = false;
 315                 }
 316
 317         init_timer(&iwm->watchdog);
 318         iwm->watchdog.function = iwm_watchdog;
 319         iwm->watchdog.data = (unsigned long)iwm;
 320         mutex_init(&iwm->mutex);
 321
 322         iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
 323                                    GFP_KERNEL);
 324         if (iwm->last_fw_err == NULL)
 325                 return -ENOMEM;
 326
 327         return 0;
 328 }
 329
 330 void iwm_priv_deinit(struct iwm_priv *iwm)
 331 {
 332         int i;
 333
 334         for (i = 0; i < IWM_TX_QUEUES; i++)
 335                 destroy_workqueue(iwm->txq[i].wq);
 336
 337         destroy_workqueue(iwm->rx_wq);
 338         kfree(iwm->last_fw_err);
 339 }
 340
 341 /*
 342  * We reset all the structures, and we reset the UMAC.
 343  * After calling this routine, you're expected to reload
 344  * the firmware.
 345  */
 346 void iwm_reset(struct iwm_priv *iwm)
 347 {
 348         struct iwm_notif *notif, *next;
 349
 350         if (test_bit(IWM_STATUS_READY, &iwm->status))
 351                 iwm_target_reset(iwm);
 352
 353         if (test_bit(IWM_STATUS_RESETTING, &iwm->status)) {
 354                 iwm->status = 0;
 355                 set_bit(IWM_STATUS_RESETTING, &iwm->status);
 356         } else
 357                 iwm->status = 0;
 358         iwm->scan_id = 1;
 359
 360         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 361                 list_del(&notif->pending);
 362                 kfree(notif->buf);
 363                 kfree(notif);
 364         }
 365
 366         iwm_cmd_flush(iwm);
 367
 368         flush_workqueue(iwm->rx_wq);
 369
 370         iwm_link_off(iwm);
 371 }
 372
 373 void iwm_resetting(struct iwm_priv *iwm)
 374 {
 375         set_bit(IWM_STATUS_RESETTING, &iwm->status);
 376
 377         schedule_work(&iwm->reset_worker);
 378 }
 379
 380 /*
 381  * Notification code:
 382  *
 383  * We're faced with the following issue: Any host command can
 384  * have an answer or not, and if there's an answer to expect,
 385  * it can be treated synchronously or asynchronously.
 386  * To work around the synchronous answer case, we implemented
 387  * our notification mechanism.
 388  * When a code path needs to wait for a command response
 389  * synchronously, it calls notif_handle(), which waits for the
 390  * right notification to show up, and then process it. Before
 391  * starting to wait, it registered as a waiter for this specific
 392  * answer (by toggling a bit in on of the handler_map), so that
 393  * the rx code knows that it needs to send a notification to the
 394  * waiting processes. It does so by calling iwm_notif_send(),
 395  * which adds the notification to the pending notifications list,
 396  * and then wakes the waiting processes up.
 397  */
 398 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
 399                    u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
 400 {
 401         struct iwm_notif *notif;
 402
 403         notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
 404         if (!notif) {
 405                 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
 406                 return -ENOMEM;
 407         }
 408
 409         INIT_LIST_HEAD(&notif->pending);
 410         notif->cmd = cmd;
 411         notif->cmd_id = cmd_id;
 412         notif->src = source;
 413         notif->buf = kzalloc(buf_size, GFP_KERNEL);
 414         if (!notif->buf) {
 415                 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
 416                 kfree(notif);
 417                 return -ENOMEM;
 418         }
 419         notif->buf_size = buf_size;
 420         memcpy(notif->buf, buf, buf_size);
 421         list_add_tail(&notif->pending, &iwm->pending_notif);
 422
 423         wake_up_interruptible(&iwm->notif_queue);
 424
 425         return 0;
 426 }
 427
 428 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
 429                                         u8 source)
 430 {
 431         struct iwm_notif *notif;
 432
 433         list_for_each_entry(notif, &iwm->pending_notif, pending) {
 434                 if ((notif->cmd_id == cmd) && (notif->src == source)) {
 435                         list_del(&notif->pending);
 436                         return notif;
 437                 }
 438         }
 439
 440         return NULL;
 441 }
 442
 443 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
 444                                         u8 source, long timeout)
 445 {
 446         int ret;
 447         struct iwm_notif *notif;
 448         unsigned long *map = NULL;
 449
 450         switch (source) {
 451         case IWM_SRC_LMAC:
 452                 map = &iwm->lmac_handler_map[0];
 453                 break;
 454         case IWM_SRC_UMAC:
 455                 map = &iwm->umac_handler_map[0];
 456                 break;
 457         case IWM_SRC_UDMA:
 458                 map = &iwm->udma_handler_map[0];
 459                 break;
 460         }
 461
 462         set_bit(cmd, map);
 463
 464         ret = wait_event_interruptible_timeout(iwm->notif_queue,
 465                          ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
 466                                                timeout);
 467         clear_bit(cmd, map);
 468
 469         if (!ret)
 470                 return NULL;
 471
 472         return notif;
 473 }
 474
 475 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
 476 {
 477         int ret;
 478         struct iwm_notif *notif;
 479
 480         notif = iwm_notif_wait(iwm, cmd, source, timeout);
 481         if (!notif)
 482                 return -ETIME;
 483
 484         ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
 485         kfree(notif->buf);
 486         kfree(notif);
 487
 488         return ret;
 489 }
 490
 491 static int iwm_config_boot_params(struct iwm_priv *iwm)
 492 {
 493         struct iwm_udma_nonwifi_cmd target_cmd;
 494         int ret;
 495
 496         /* check Wimax is off and config debug monitor */
 497         if (!modparam_wimax_enable) {
 498                 u32 data1 = 0x1f;
 499                 u32 addr1 = 0x606BE258;
 500
 501                 u32 data2_set = 0x0;
 502                 u32 data2_clr = 0x1;
 503                 u32 addr2 = 0x606BE100;
 504
 505                 u32 data3 = 0x1;
 506                 u32 addr3 = 0x606BEC00;
 507
 508                 target_cmd.resp = 0;
 509                 target_cmd.handle_by_hw = 0;
 510                 target_cmd.eop = 1;
 511
 512                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 513                 target_cmd.addr = cpu_to_le32(addr1);
 514                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 515                 target_cmd.op2 = 0;
 516
 517                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 518                 if (ret < 0) {
 519                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 520                         return ret;
 521                 }
 522
 523                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
 524                 target_cmd.addr = cpu_to_le32(addr2);
 525                 target_cmd.op1_sz = cpu_to_le32(data2_set);
 526                 target_cmd.op2 = cpu_to_le32(data2_clr);
 527
 528                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 529                 if (ret < 0) {
 530                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 531                         return ret;
 532                 }
 533
 534                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 535                 target_cmd.addr = cpu_to_le32(addr3);
 536                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 537                 target_cmd.op2 = 0;
 538
 539                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
 540                 if (ret < 0) {
 541                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 542                         return ret;
 543                 }
 544         }
 545
 546         return 0;
 547 }
 548
 549 void iwm_init_default_profile(struct iwm_priv *iwm,
 550                               struct iwm_umac_profile *profile)
 551 {
 552         memset(profile, 0, sizeof(struct iwm_umac_profile));
 553
 554         profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
 555         profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
 556         profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
 557         profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
 558
 559         if (iwm->conf.enable_qos)
 560                 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
 561
 562         profile->wireless_mode = iwm->conf.wireless_mode;
 563         profile->mode = cpu_to_le32(iwm->conf.mode);
 564
 565         profile->ibss.atim = 0;
 566         profile->ibss.beacon_interval = 100;
 567         profile->ibss.join_only = 0;
 568         profile->ibss.band = iwm->conf.ibss_band;
 569         profile->ibss.channel = iwm->conf.ibss_channel;
 570 }
 571
 572 void iwm_link_on(struct iwm_priv *iwm)
 573 {
 574         netif_carrier_on(iwm_to_ndev(iwm));
 575         netif_tx_wake_all_queues(iwm_to_ndev(iwm));
 576
 577         iwm_send_umac_stats_req(iwm, 0);
 578 }
 579
 580 void iwm_link_off(struct iwm_priv *iwm)
 581 {
 582         struct iw_statistics *wstats = &iwm->wstats;
 583         int i;
 584
 585         netif_tx_stop_all_queues(iwm_to_ndev(iwm));
 586         netif_carrier_off(iwm_to_ndev(iwm));
 587
 588         for (i = 0; i < IWM_TX_QUEUES; i++) {
 589                 skb_queue_purge(&iwm->txq[i].queue);
 590                 skb_queue_purge(&iwm->txq[i].stopped_queue);
 591
 592                 iwm->txq[i].concat_count = 0;
 593                 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
 594
 595                 flush_workqueue(iwm->txq[i].wq);
 596         }
 597
 598         iwm_rx_free(iwm);
 599
 600         cancel_delayed_work_sync(&iwm->stats_request);
 601         memset(wstats, 0, sizeof(struct iw_statistics));
 602         wstats->qual.updated = IW_QUAL_ALL_INVALID;
 603
 604         kfree(iwm->req_ie);
 605         iwm->req_ie = NULL;
 606         iwm->req_ie_len = 0;
 607         kfree(iwm->resp_ie);
 608         iwm->resp_ie = NULL;
 609         iwm->resp_ie_len = 0;
 610
 611         del_timer_sync(&iwm->watchdog);
 612 }
 613
 614 static void iwm_bss_list_clean(struct iwm_priv *iwm)
 615 {
 616         struct iwm_bss_info *bss, *next;
 617
 618         list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
 619                 list_del(&bss->node);
 620                 kfree(bss->bss);
 621                 kfree(bss);
 622         }
 623 }
 624
 625 static int iwm_channels_init(struct iwm_priv *iwm)
 626 {
 627         int ret;
 628
 629         ret = iwm_send_umac_channel_list(iwm);
 630         if (ret) {
 631                 IWM_ERR(iwm, "Send channel list failed\n");
 632                 return ret;
 633         }
 634
 635         ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
 636                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 637         if (ret) {
 638                 IWM_ERR(iwm, "Didn't get a channel list notification\n");
 639                 return ret;
 640         }
 641
 642         return 0;
 643 }
 644
 645 static int __iwm_up(struct iwm_priv *iwm)
 646 {
 647         int ret;
 648         struct iwm_notif *notif_reboot, *notif_ack = NULL;
 649         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 650         u32 wireless_mode;
 651
 652         ret = iwm_bus_enable(iwm);
 653         if (ret) {
 654                 IWM_ERR(iwm, "Couldn't enable function\n");
 655                 return ret;
 656         }
 657
 658         iwm_rx_setup_handlers(iwm);
 659
 660         /* Wait for initial BARKER_REBOOT from hardware */
 661         notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
 662                                       IWM_SRC_UDMA, 2 * HZ);
 663         if (!notif_reboot) {
 664                 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
 665                 goto err_disable;
 666         }
 667
 668         /* We send the barker back */
 669         ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
 670         if (ret) {
 671                 IWM_ERR(iwm, "REBOOT barker response failed\n");
 672                 kfree(notif_reboot);
 673                 goto err_disable;
 674         }
 675
 676         kfree(notif_reboot->buf);
 677         kfree(notif_reboot);
 678
 679         /* Wait for ACK_BARKER from hardware */
 680         notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
 681                                    IWM_SRC_UDMA, 2 * HZ);
 682         if (!notif_ack) {
 683                 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
 684                 goto err_disable;
 685         }
 686
 687         kfree(notif_ack->buf);
 688         kfree(notif_ack);
 689
 690         /* We start to config static boot parameters */
 691         ret = iwm_config_boot_params(iwm);
 692         if (ret) {
 693                 IWM_ERR(iwm, "Config boot parameters failed\n");
 694                 goto err_disable;
 695         }
 696
 697         ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
 698         if (ret) {
 699                 IWM_ERR(iwm, "MAC reading failed\n");
 700                 goto err_disable;
 701         }
 702         memcpy(iwm_to_ndev(iwm)->perm_addr, iwm_to_ndev(iwm)->dev_addr,
 703                 ETH_ALEN);
 704
 705         /* We can load the FWs */
 706         ret = iwm_load_fw(iwm);
 707         if (ret) {
 708                 IWM_ERR(iwm, "FW loading failed\n");
 709                 goto err_disable;
 710         }
 711
 712         ret = iwm_eeprom_fat_channels(iwm);
 713         if (ret) {
 714                 IWM_ERR(iwm, "Couldnt read HT channels EEPROM entries\n");
 715                 goto err_fw;
 716         }
 717
 718         /*
 719          * Read our SKU capabilities.
 720          * If it's valid, we AND the configured wireless mode with the
 721          * device EEPROM value as the current profile wireless mode.
 722          */
 723         wireless_mode = iwm_eeprom_wireless_mode(iwm);
 724         if (wireless_mode) {
 725                 iwm->conf.wireless_mode &= wireless_mode;
 726                 if (iwm->umac_profile)
 727                         iwm->umac_profile->wireless_mode =
 728                                         iwm->conf.wireless_mode;
 729         } else
 730                 IWM_ERR(iwm, "Wrong SKU capabilities: 0x%x\n",
 731                         *((u16 *)iwm_eeprom_access(iwm, IWM_EEPROM_SKU_CAP)));
 732
 733         snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "L%s_U%s",
 734                  iwm->lmac_version, iwm->umac_version);
 735
 736         /* We configure the UMAC and enable the wifi module */
 737         ret = iwm_send_umac_config(iwm,
 738                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
 739                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
 740                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
 741         if (ret) {
 742                 IWM_ERR(iwm, "UMAC config failed\n");
 743                 goto err_fw;
 744         }
 745
 746         ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 747                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 748         if (ret) {
 749                 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
 750                 goto err_fw;
 751         }
 752
 753         if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 754                                   UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 755                 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
 756                              iwm->core_enabled);
 757                 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 758                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 759                 if (ret) {
 760                         IWM_ERR(iwm, "Didn't get a core status notification\n");
 761                         goto err_fw;
 762                 }
 763
 764                 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 765                                           UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 766                         IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
 767                                 iwm->core_enabled);
 768                         goto err_fw;
 769                 } else {
 770                         IWM_INFO(iwm, "All cores enabled\n");
 771                 }
 772         }
 773
 774         ret = iwm_channels_init(iwm);
 775         if (ret < 0) {
 776                 IWM_ERR(iwm, "Couldn't init channels\n");
 777                 goto err_fw;
 778         }
 779
 780         /* Set the READY bit to indicate interface is brought up successfully */
 781         set_bit(IWM_STATUS_READY, &iwm->status);
 782
 783         return 0;
 784
 785  err_fw:
 786         iwm_eeprom_exit(iwm);
 787
 788  err_disable:
 789         ret = iwm_bus_disable(iwm);
 790         if (ret < 0)
 791                 IWM_ERR(iwm, "Couldn't disable function\n");
 792
 793         return -EIO;
 794 }
 795
 796 int iwm_up(struct iwm_priv *iwm)
 797 {
 798         int ret;
 799
 800         mutex_lock(&iwm->mutex);
 801         ret = __iwm_up(iwm);
 802         mutex_unlock(&iwm->mutex);
 803
 804         return ret;
 805 }
 806
 807 static int __iwm_down(struct iwm_priv *iwm)
 808 {
 809         int ret;
 810
 811         /* The interface is already down */
 812         if (!test_bit(IWM_STATUS_READY, &iwm->status))
 813                 return 0;
 814
 815         if (iwm->scan_request) {
 816                 cfg80211_scan_done(iwm->scan_request, true);
 817                 iwm->scan_request = NULL;
 818         }
 819
 820         clear_bit(IWM_STATUS_READY, &iwm->status);
 821
 822         iwm_eeprom_exit(iwm);
 823         iwm_bss_list_clean(iwm);
 824         iwm_init_default_profile(iwm, iwm->umac_profile);
 825         iwm->umac_profile_active = false;
 826         iwm->default_key = -1;
 827         iwm->core_enabled = 0;
 828
 829         ret = iwm_bus_disable(iwm);
 830         if (ret < 0) {
 831                 IWM_ERR(iwm, "Couldn't disable function\n");
 832                 return ret;
 833         }
 834
 835         return 0;
 836 }
 837
 838 int iwm_down(struct iwm_priv *iwm)
 839 {
 840         int ret;
 841
 842         mutex_lock(&iwm->mutex);
 843         ret = __iwm_down(iwm);
 844         mutex_unlock(&iwm->mutex);
 845
 846         return ret;
 847 }