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/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         iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
 264                                    GFP_KERNEL);
 265         if (iwm->last_fw_err == NULL)
 266                 return -ENOMEM;
 267
 268         return 0;
 269 }
 270
 271 void iwm_priv_deinit(struct iwm_priv *iwm)
 272 {
 273         int i;
 274
 275         for (i = 0; i < IWM_TX_QUEUES; i++)
 276                 destroy_workqueue(iwm->txq[i].wq);
 277
 278         destroy_workqueue(iwm->rx_wq);
 279         kfree(iwm->last_fw_err);
 280 }
 281
 282 /*
 283  * We reset all the structures, and we reset the UMAC.
 284  * After calling this routine, you're expected to reload
 285  * the firmware.
 286  */
 287 void iwm_reset(struct iwm_priv *iwm)
 288 {
 289         struct iwm_notif *notif, *next;
 290
 291         if (test_bit(IWM_STATUS_READY, &iwm->status))
 292                 iwm_target_reset(iwm);
 293
 294         if (test_bit(IWM_STATUS_RESETTING, &iwm->status)) {
 295                 iwm->status = 0;
 296                 set_bit(IWM_STATUS_RESETTING, &iwm->status);
 297         } else
 298                 iwm->status = 0;
 299         iwm->scan_id = 1;
 300
 301         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 302                 list_del(&notif->pending);
 303                 kfree(notif->buf);
 304                 kfree(notif);
 305         }
 306
 307         iwm_cmd_flush(iwm);
 308
 309         flush_workqueue(iwm->rx_wq);
 310
 311         iwm_link_off(iwm);
 312 }
 313
 314 void iwm_resetting(struct iwm_priv *iwm)
 315 {
 316         set_bit(IWM_STATUS_RESETTING, &iwm->status);
 317
 318         schedule_work(&iwm->reset_worker);
 319 }
 320
 321 /*
 322  * Notification code:
 323  *
 324  * We're faced with the following issue: Any host command can
 325  * have an answer or not, and if there's an answer to expect,
 326  * it can be treated synchronously or asynchronously.
 327  * To work around the synchronous answer case, we implemented
 328  * our notification mechanism.
 329  * When a code path needs to wait for a command response
 330  * synchronously, it calls notif_handle(), which waits for the
 331  * right notification to show up, and then process it. Before
 332  * starting to wait, it registered as a waiter for this specific
 333  * answer (by toggling a bit in on of the handler_map), so that
 334  * the rx code knows that it needs to send a notification to the
 335  * waiting processes. It does so by calling iwm_notif_send(),
 336  * which adds the notification to the pending notifications list,
 337  * and then wakes the waiting processes up.
 338  */
 339 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
 340                    u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
 341 {
 342         struct iwm_notif *notif;
 343
 344         notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
 345         if (!notif) {
 346                 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
 347                 return -ENOMEM;
 348         }
 349
 350         INIT_LIST_HEAD(&notif->pending);
 351         notif->cmd = cmd;
 352         notif->cmd_id = cmd_id;
 353         notif->src = source;
 354         notif->buf = kzalloc(buf_size, GFP_KERNEL);
 355         if (!notif->buf) {
 356                 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
 357                 kfree(notif);
 358                 return -ENOMEM;
 359         }
 360         notif->buf_size = buf_size;
 361         memcpy(notif->buf, buf, buf_size);
 362         list_add_tail(&notif->pending, &iwm->pending_notif);
 363
 364         wake_up_interruptible(&iwm->notif_queue);
 365
 366         return 0;
 367 }
 368
 369 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
 370                                         u8 source)
 371 {
 372         struct iwm_notif *notif, *next;
 373
 374         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 375                 if ((notif->cmd_id == cmd) && (notif->src == source)) {
 376                         list_del(&notif->pending);
 377                         return notif;
 378                 }
 379         }
 380
 381         return NULL;
 382 }
 383
 384 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
 385                                         u8 source, long timeout)
 386 {
 387         int ret;
 388         struct iwm_notif *notif;
 389         unsigned long *map = NULL;
 390
 391         switch (source) {
 392         case IWM_SRC_LMAC:
 393                 map = &iwm->lmac_handler_map[0];
 394                 break;
 395         case IWM_SRC_UMAC:
 396                 map = &iwm->umac_handler_map[0];
 397                 break;
 398         case IWM_SRC_UDMA:
 399                 map = &iwm->udma_handler_map[0];
 400                 break;
 401         }
 402
 403         set_bit(cmd, map);
 404
 405         ret = wait_event_interruptible_timeout(iwm->notif_queue,
 406                          ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
 407                                                timeout);
 408         clear_bit(cmd, map);
 409
 410         if (!ret)
 411                 return NULL;
 412
 413         return notif;
 414 }
 415
 416 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
 417 {
 418         int ret;
 419         struct iwm_notif *notif;
 420
 421         notif = iwm_notif_wait(iwm, cmd, source, timeout);
 422         if (!notif)
 423                 return -ETIME;
 424
 425         ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
 426         kfree(notif->buf);
 427         kfree(notif);
 428
 429         return ret;
 430 }
 431
 432 static int iwm_config_boot_params(struct iwm_priv *iwm)
 433 {
 434         struct iwm_udma_nonwifi_cmd target_cmd;
 435         int ret;
 436
 437         /* check Wimax is off and config debug monitor */
 438         if (iwm->conf.wimax_not_present) {
 439                 u32 data1 = 0x1f;
 440                 u32 addr1 = 0x606BE258;
 441
 442                 u32 data2_set = 0x0;
 443                 u32 data2_clr = 0x1;
 444                 u32 addr2 = 0x606BE100;
 445
 446                 u32 data3 = 0x1;
 447                 u32 addr3 = 0x606BEC00;
 448
 449                 target_cmd.resp = 0;
 450                 target_cmd.handle_by_hw = 0;
 451                 target_cmd.eop = 1;
 452
 453                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 454                 target_cmd.addr = cpu_to_le32(addr1);
 455                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 456                 target_cmd.op2 = 0;
 457
 458                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 459                 if (ret < 0) {
 460                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 461                         return ret;
 462                 }
 463
 464                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
 465                 target_cmd.addr = cpu_to_le32(addr2);
 466                 target_cmd.op1_sz = cpu_to_le32(data2_set);
 467                 target_cmd.op2 = cpu_to_le32(data2_clr);
 468
 469                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 470                 if (ret < 0) {
 471                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 472                         return ret;
 473                 }
 474
 475                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 476                 target_cmd.addr = cpu_to_le32(addr3);
 477                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 478                 target_cmd.op2 = 0;
 479
 480                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
 481                 if (ret < 0) {
 482                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 483                         return ret;
 484                 }
 485         }
 486
 487         return 0;
 488 }
 489
 490 void iwm_init_default_profile(struct iwm_priv *iwm,
 491                               struct iwm_umac_profile *profile)
 492 {
 493         memset(profile, 0, sizeof(struct iwm_umac_profile));
 494
 495         profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
 496         profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
 497         profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
 498         profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
 499
 500         if (iwm->conf.enable_qos)
 501                 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
 502
 503         profile->wireless_mode = iwm->conf.wireless_mode;
 504         profile->mode = cpu_to_le32(iwm->conf.mode);
 505
 506         profile->ibss.atim = 0;
 507         profile->ibss.beacon_interval = 100;
 508         profile->ibss.join_only = 0;
 509         profile->ibss.band = iwm->conf.ibss_band;
 510         profile->ibss.channel = iwm->conf.ibss_channel;
 511 }
 512
 513 void iwm_link_on(struct iwm_priv *iwm)
 514 {
 515         netif_carrier_on(iwm_to_ndev(iwm));
 516         netif_tx_wake_all_queues(iwm_to_ndev(iwm));
 517
 518         iwm_send_umac_stats_req(iwm, 0);
 519 }
 520
 521 void iwm_link_off(struct iwm_priv *iwm)
 522 {
 523         struct iw_statistics *wstats = &iwm->wstats;
 524         int i;
 525
 526         netif_tx_stop_all_queues(iwm_to_ndev(iwm));
 527         netif_carrier_off(iwm_to_ndev(iwm));
 528
 529         for (i = 0; i < IWM_TX_QUEUES; i++) {
 530                 skb_queue_purge(&iwm->txq[i].queue);
 531
 532                 iwm->txq[i].concat_count = 0;
 533                 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
 534
 535                 flush_workqueue(iwm->txq[i].wq);
 536         }
 537
 538         iwm_rx_free(iwm);
 539
 540         cancel_delayed_work_sync(&iwm->stats_request);
 541         memset(wstats, 0, sizeof(struct iw_statistics));
 542         wstats->qual.updated = IW_QUAL_ALL_INVALID;
 543
 544         kfree(iwm->req_ie);
 545         iwm->req_ie = NULL;
 546         iwm->req_ie_len = 0;
 547         kfree(iwm->resp_ie);
 548         iwm->resp_ie = NULL;
 549         iwm->resp_ie_len = 0;
 550
 551         del_timer_sync(&iwm->watchdog);
 552 }
 553
 554 static void iwm_bss_list_clean(struct iwm_priv *iwm)
 555 {
 556         struct iwm_bss_info *bss, *next;
 557
 558         list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
 559                 list_del(&bss->node);
 560                 kfree(bss->bss);
 561                 kfree(bss);
 562         }
 563 }
 564
 565 static int iwm_channels_init(struct iwm_priv *iwm)
 566 {
 567         int ret;
 568
 569         ret = iwm_send_umac_channel_list(iwm);
 570         if (ret) {
 571                 IWM_ERR(iwm, "Send channel list failed\n");
 572                 return ret;
 573         }
 574
 575         ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
 576                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 577         if (ret) {
 578                 IWM_ERR(iwm, "Didn't get a channel list notification\n");
 579                 return ret;
 580         }
 581
 582         return 0;
 583 }
 584
 585 static int __iwm_up(struct iwm_priv *iwm)
 586 {
 587         int ret;
 588         struct iwm_notif *notif_reboot, *notif_ack = NULL;
 589
 590         ret = iwm_bus_enable(iwm);
 591         if (ret) {
 592                 IWM_ERR(iwm, "Couldn't enable function\n");
 593                 return ret;
 594         }
 595
 596         iwm_rx_setup_handlers(iwm);
 597
 598         /* Wait for initial BARKER_REBOOT from hardware */
 599         notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
 600                                       IWM_SRC_UDMA, 2 * HZ);
 601         if (!notif_reboot) {
 602                 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
 603                 goto err_disable;
 604         }
 605
 606         /* We send the barker back */
 607         ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
 608         if (ret) {
 609                 IWM_ERR(iwm, "REBOOT barker response failed\n");
 610                 kfree(notif_reboot);
 611                 goto err_disable;
 612         }
 613
 614         kfree(notif_reboot->buf);
 615         kfree(notif_reboot);
 616
 617         /* Wait for ACK_BARKER from hardware */
 618         notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
 619                                    IWM_SRC_UDMA, 2 * HZ);
 620         if (!notif_ack) {
 621                 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
 622                 goto err_disable;
 623         }
 624
 625         kfree(notif_ack->buf);
 626         kfree(notif_ack);
 627
 628         /* We start to config static boot parameters */
 629         ret = iwm_config_boot_params(iwm);
 630         if (ret) {
 631                 IWM_ERR(iwm, "Config boot parameters failed\n");
 632                 goto err_disable;
 633         }
 634
 635         ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
 636         if (ret) {
 637                 IWM_ERR(iwm, "MAC reading failed\n");
 638                 goto err_disable;
 639         }
 640
 641         /* We can load the FWs */
 642         ret = iwm_load_fw(iwm);
 643         if (ret) {
 644                 IWM_ERR(iwm, "FW loading failed\n");
 645                 goto err_disable;
 646         }
 647
 648         /* We configure the UMAC and enable the wifi module */
 649         ret = iwm_send_umac_config(iwm,
 650                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
 651                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
 652                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
 653         if (ret) {
 654                 IWM_ERR(iwm, "UMAC config failed\n");
 655                 goto err_fw;
 656         }
 657
 658         ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 659                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 660         if (ret) {
 661                 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
 662                 goto err_fw;
 663         }
 664
 665         if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 666                                   UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 667                 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
 668                              iwm->core_enabled);
 669                 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 670                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 671                 if (ret) {
 672                         IWM_ERR(iwm, "Didn't get a core status notification\n");
 673                         goto err_fw;
 674                 }
 675
 676                 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 677                                           UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 678                         IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
 679                                 iwm->core_enabled);
 680                         goto err_fw;
 681                 } else {
 682                         IWM_INFO(iwm, "All cores enabled\n");
 683                 }
 684         }
 685
 686         ret = iwm_channels_init(iwm);
 687         if (ret < 0) {
 688                 IWM_ERR(iwm, "Couldn't init channels\n");
 689                 goto err_fw;
 690         }
 691
 692         /* Set the READY bit to indicate interface is brought up successfully */
 693         set_bit(IWM_STATUS_READY, &iwm->status);
 694
 695         return 0;
 696
 697  err_fw:
 698         iwm_eeprom_exit(iwm);
 699
 700  err_disable:
 701         ret = iwm_bus_disable(iwm);
 702         if (ret < 0)
 703                 IWM_ERR(iwm, "Couldn't disable function\n");
 704
 705         return -EIO;
 706 }
 707
 708 int iwm_up(struct iwm_priv *iwm)
 709 {
 710         int ret;
 711
 712         mutex_lock(&iwm->mutex);
 713         ret = __iwm_up(iwm);
 714         mutex_unlock(&iwm->mutex);
 715
 716         return ret;
 717 }
 718
 719 static int __iwm_down(struct iwm_priv *iwm)
 720 {
 721         int ret;
 722
 723         /* The interface is already down */
 724         if (!test_bit(IWM_STATUS_READY, &iwm->status))
 725                 return 0;
 726
 727         if (iwm->scan_request) {
 728                 cfg80211_scan_done(iwm->scan_request, true);
 729                 iwm->scan_request = NULL;
 730         }
 731
 732         clear_bit(IWM_STATUS_READY, &iwm->status);
 733
 734         iwm_eeprom_exit(iwm);
 735         iwm_bss_list_clean(iwm);
 736         iwm_init_default_profile(iwm, iwm->umac_profile);
 737         iwm->umac_profile_active = false;
 738         iwm->default_key = -1;
 739         iwm->core_enabled = 0;
 740
 741         ret = iwm_bus_disable(iwm);
 742         if (ret < 0) {
 743                 IWM_ERR(iwm, "Couldn't disable function\n");
 744                 return ret;
 745         }
 746
 747         return 0;
 748 }
 749
 750 int iwm_down(struct iwm_priv *iwm)
 751 {
 752         int ret;
 753
 754         mutex_lock(&iwm->mutex);
 755         ret = __iwm_down(iwm);
 756         mutex_unlock(&iwm->mutex);
 757
 758         return ret;
 759 }