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