git.oblomov.eu Git - linux-2.6/blob - 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         .init_calib_map         = BIT(PHY_CALIBRATE_DC_CMD)     |
  57                                   BIT(PHY_CALIBRATE_LO_CMD)     |
  58                                   BIT(PHY_CALIBRATE_TX_IQ_CMD)  |
  59                                   BIT(PHY_CALIBRATE_RX_IQ_CMD),
  60         .periodic_calib_map     = BIT(PHY_CALIBRATE_DC_CMD)     |
  61                                   BIT(PHY_CALIBRATE_LO_CMD)     |
  62                                   BIT(PHY_CALIBRATE_TX_IQ_CMD)  |
  63                                   BIT(PHY_CALIBRATE_RX_IQ_CMD)  |
  64                                   BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
  65         .reset_on_fatal_err     = 1,
  66         .auto_connect           = 1,
  67         .wimax_not_present      = 0,
  68         .enable_qos             = 1,
  69         .mode                   = UMAC_MODE_BSS,
  70
  71         /* UMAC configuration */
  72         .power_index            = 0,
  73         .frag_threshold         = IEEE80211_MAX_FRAG_THRESHOLD,
  74         .rts_threshold          = IEEE80211_MAX_RTS_THRESHOLD,
  75         .cts_to_self            = 0,
  76
  77         .assoc_timeout          = 2,
  78         .roam_timeout           = 10,
  79         .wireless_mode          = WIRELESS_MODE_11A | WIRELESS_MODE_11G,
  80         .coexist_mode           = COEX_MODE_CM,
  81
  82         /* IBSS */
  83         .ibss_band              = UMAC_BAND_2GHZ,
  84         .ibss_channel           = 1,
  85
  86         .mac_addr               = {0x00, 0x02, 0xb3, 0x01, 0x02, 0x03},
  87 };
  88
  89 static int modparam_reset;
  90 module_param_named(reset, modparam_reset, bool, 0644);
  91 MODULE_PARM_DESC(reset, "reset on firmware errors (default 0 [not reset])");
  92
  93 int iwm_mode_to_nl80211_iftype(int mode)
  94 {
  95         switch (mode) {
  96         case UMAC_MODE_BSS:
  97                 return NL80211_IFTYPE_STATION;
  98         case UMAC_MODE_IBSS:
  99                 return NL80211_IFTYPE_ADHOC;
 100         default:
 101                 return NL80211_IFTYPE_UNSPECIFIED;
 102         }
 103
 104         return 0;
 105 }
 106
 107 static void iwm_statistics_request(struct work_struct *work)
 108 {
 109         struct iwm_priv *iwm =
 110                 container_of(work, struct iwm_priv, stats_request.work);
 111
 112         iwm_send_umac_stats_req(iwm, 0);
 113 }
 114
 115 static void iwm_reset_worker(struct work_struct *work)
 116 {
 117         struct iwm_priv *iwm;
 118         struct iwm_umac_profile *profile = NULL;
 119         int uninitialized_var(ret), retry = 0;
 120
 121         iwm = container_of(work, struct iwm_priv, reset_worker);
 122
 123         if (iwm->umac_profile_active) {
 124                 profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
 125                 if (profile)
 126                         memcpy(profile, iwm->umac_profile, sizeof(*profile));
 127                 else
 128                         IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
 129         }
 130
 131         iwm_down(iwm);
 132
 133         while (retry++ < 3) {
 134                 ret = iwm_up(iwm);
 135                 if (!ret)
 136                         break;
 137
 138                 schedule_timeout_uninterruptible(10 * HZ);
 139         }
 140
 141         if (ret) {
 142                 IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);
 143
 144                 kfree(profile);
 145                 return;
 146         }
 147
 148         if (profile) {
 149                 IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
 150                 memcpy(iwm->umac_profile, profile, sizeof(*profile));
 151                 iwm_send_mlme_profile(iwm);
 152                 kfree(profile);
 153         }
 154 }
 155
 156 static void iwm_watchdog(unsigned long data)
 157 {
 158         struct iwm_priv *iwm = (struct iwm_priv *)data;
 159
 160         IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");
 161
 162         if (modparam_reset)
 163                 schedule_work(&iwm->reset_worker);
 164 }
 165
 166 int iwm_priv_init(struct iwm_priv *iwm)
 167 {
 168         int i;
 169         char name[32];
 170
 171         iwm->status = 0;
 172         INIT_LIST_HEAD(&iwm->pending_notif);
 173         init_waitqueue_head(&iwm->notif_queue);
 174         init_waitqueue_head(&iwm->nonwifi_queue);
 175         init_waitqueue_head(&iwm->mlme_queue);
 176         memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
 177         spin_lock_init(&iwm->tx_credit.lock);
 178         INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
 179         INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
 180         iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
 181         iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
 182         spin_lock_init(&iwm->cmd_lock);
 183         iwm->scan_id = 1;
 184         INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
 185         INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
 186         INIT_LIST_HEAD(&iwm->bss_list);
 187
 188         skb_queue_head_init(&iwm->rx_list);
 189         INIT_LIST_HEAD(&iwm->rx_tickets);
 190         for (i = 0; i < IWM_RX_ID_HASH; i++)
 191                 INIT_LIST_HEAD(&iwm->rx_packets[i]);
 192
 193         INIT_WORK(&iwm->rx_worker, iwm_rx_worker);
 194
 195         iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
 196         if (!iwm->rx_wq)
 197                 return -EAGAIN;
 198
 199         for (i = 0; i < IWM_TX_QUEUES; i++) {
 200                 INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
 201                 snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
 202                 iwm->txq[i].id = i;
 203                 iwm->txq[i].wq = create_singlethread_workqueue(name);
 204                 if (!iwm->txq[i].wq)
 205                         return -EAGAIN;
 206
 207                 skb_queue_head_init(&iwm->txq[i].queue);
 208         }
 209
 210         for (i = 0; i < IWM_NUM_KEYS; i++)
 211                 memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
 212
 213         iwm->default_key = NULL;
 214
 215         init_timer(&iwm->watchdog);
 216         iwm->watchdog.function = iwm_watchdog;
 217         iwm->watchdog.data = (unsigned long)iwm;
 218
 219         return 0;
 220 }
 221
 222 /*
 223  * We reset all the structures, and we reset the UMAC.
 224  * After calling this routine, you're expected to reload
 225  * the firmware.
 226  */
 227 void iwm_reset(struct iwm_priv *iwm)
 228 {
 229         struct iwm_notif *notif, *next;
 230
 231         if (test_bit(IWM_STATUS_READY, &iwm->status))
 232                 iwm_target_reset(iwm);
 233
 234         iwm->status = 0;
 235         iwm->scan_id = 1;
 236
 237         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 238                 list_del(&notif->pending);
 239                 kfree(notif->buf);
 240                 kfree(notif);
 241         }
 242
 243         iwm_cmd_flush(iwm);
 244
 245         flush_workqueue(iwm->rx_wq);
 246
 247         iwm_link_off(iwm);
 248 }
 249
 250 /*
 251  * Notification code:
 252  *
 253  * We're faced with the following issue: Any host command can
 254  * have an answer or not, and if there's an answer to expect,
 255  * it can be treated synchronously or asynchronously.
 256  * To work around the synchronous answer case, we implemented
 257  * our notification mechanism.
 258  * When a code path needs to wait for a command response
 259  * synchronously, it calls notif_handle(), which waits for the
 260  * right notification to show up, and then process it. Before
 261  * starting to wait, it registered as a waiter for this specific
 262  * answer (by toggling a bit in on of the handler_map), so that
 263  * the rx code knows that it needs to send a notification to the
 264  * waiting processes. It does so by calling iwm_notif_send(),
 265  * which adds the notification to the pending notifications list,
 266  * and then wakes the waiting processes up.
 267  */
 268 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
 269                    u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
 270 {
 271         struct iwm_notif *notif;
 272
 273         notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
 274         if (!notif) {
 275                 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
 276                 return -ENOMEM;
 277         }
 278
 279         INIT_LIST_HEAD(&notif->pending);
 280         notif->cmd = cmd;
 281         notif->cmd_id = cmd_id;
 282         notif->src = source;
 283         notif->buf = kzalloc(buf_size, GFP_KERNEL);
 284         if (!notif->buf) {
 285                 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
 286                 kfree(notif);
 287                 return -ENOMEM;
 288         }
 289         notif->buf_size = buf_size;
 290         memcpy(notif->buf, buf, buf_size);
 291         list_add_tail(&notif->pending, &iwm->pending_notif);
 292
 293         wake_up_interruptible(&iwm->notif_queue);
 294
 295         return 0;
 296 }
 297
 298 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
 299                                         u8 source)
 300 {
 301         struct iwm_notif *notif, *next;
 302
 303         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 304                 if ((notif->cmd_id == cmd) && (notif->src == source)) {
 305                         list_del(&notif->pending);
 306                         return notif;
 307                 }
 308         }
 309
 310         return NULL;
 311 }
 312
 313 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
 314                                         u8 source, long timeout)
 315 {
 316         int ret;
 317         struct iwm_notif *notif;
 318         unsigned long *map = NULL;
 319
 320         switch (source) {
 321         case IWM_SRC_LMAC:
 322                 map = &iwm->lmac_handler_map[0];
 323                 break;
 324         case IWM_SRC_UMAC:
 325                 map = &iwm->umac_handler_map[0];
 326                 break;
 327         case IWM_SRC_UDMA:
 328                 map = &iwm->udma_handler_map[0];
 329                 break;
 330         }
 331
 332         set_bit(cmd, map);
 333
 334         ret = wait_event_interruptible_timeout(iwm->notif_queue,
 335                          ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
 336                                                timeout);
 337         clear_bit(cmd, map);
 338
 339         if (!ret)
 340                 return NULL;
 341
 342         return notif;
 343 }
 344
 345 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
 346 {
 347         int ret;
 348         struct iwm_notif *notif;
 349
 350         notif = iwm_notif_wait(iwm, cmd, source, timeout);
 351         if (!notif)
 352                 return -ETIME;
 353
 354         ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
 355         kfree(notif->buf);
 356         kfree(notif);
 357
 358         return ret;
 359 }
 360
 361 static int iwm_config_boot_params(struct iwm_priv *iwm)
 362 {
 363         struct iwm_udma_nonwifi_cmd target_cmd;
 364         int ret;
 365
 366         /* check Wimax is off and config debug monitor */
 367         if (iwm->conf.wimax_not_present) {
 368                 u32 data1 = 0x1f;
 369                 u32 addr1 = 0x606BE258;
 370
 371                 u32 data2_set = 0x0;
 372                 u32 data2_clr = 0x1;
 373                 u32 addr2 = 0x606BE100;
 374
 375                 u32 data3 = 0x1;
 376                 u32 addr3 = 0x606BEC00;
 377
 378                 target_cmd.resp = 0;
 379                 target_cmd.handle_by_hw = 0;
 380                 target_cmd.eop = 1;
 381
 382                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 383                 target_cmd.addr = cpu_to_le32(addr1);
 384                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 385                 target_cmd.op2 = 0;
 386
 387                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 388                 if (ret < 0) {
 389                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 390                         return ret;
 391                 }
 392
 393                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
 394                 target_cmd.addr = cpu_to_le32(addr2);
 395                 target_cmd.op1_sz = cpu_to_le32(data2_set);
 396                 target_cmd.op2 = cpu_to_le32(data2_clr);
 397
 398                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 399                 if (ret < 0) {
 400                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 401                         return ret;
 402                 }
 403
 404                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 405                 target_cmd.addr = cpu_to_le32(addr3);
 406                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 407                 target_cmd.op2 = 0;
 408
 409                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
 410                 if (ret < 0) {
 411                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 412                         return ret;
 413                 }
 414         }
 415
 416         return 0;
 417 }
 418
 419 void iwm_init_default_profile(struct iwm_priv *iwm,
 420                               struct iwm_umac_profile *profile)
 421 {
 422         memset(profile, 0, sizeof(struct iwm_umac_profile));
 423
 424         profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
 425         profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
 426         profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
 427         profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
 428
 429         if (iwm->conf.enable_qos)
 430                 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
 431
 432         profile->wireless_mode = iwm->conf.wireless_mode;
 433         profile->mode = cpu_to_le32(iwm->conf.mode);
 434
 435         profile->ibss.atim = 0;
 436         profile->ibss.beacon_interval = 100;
 437         profile->ibss.join_only = 0;
 438         profile->ibss.band = iwm->conf.ibss_band;
 439         profile->ibss.channel = iwm->conf.ibss_channel;
 440 }
 441
 442 void iwm_link_on(struct iwm_priv *iwm)
 443 {
 444         netif_carrier_on(iwm_to_ndev(iwm));
 445         netif_tx_wake_all_queues(iwm_to_ndev(iwm));
 446
 447         iwm_send_umac_stats_req(iwm, 0);
 448 }
 449
 450 void iwm_link_off(struct iwm_priv *iwm)
 451 {
 452         struct iw_statistics *wstats = &iwm->wstats;
 453         int i;
 454
 455         netif_tx_stop_all_queues(iwm_to_ndev(iwm));
 456         netif_carrier_off(iwm_to_ndev(iwm));
 457
 458         for (i = 0; i < IWM_TX_QUEUES; i++) {
 459                 skb_queue_purge(&iwm->txq[i].queue);
 460
 461                 iwm->txq[i].concat_count = 0;
 462                 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
 463
 464                 flush_workqueue(iwm->txq[i].wq);
 465         }
 466
 467         iwm_rx_free(iwm);
 468
 469         cancel_delayed_work(&iwm->stats_request);
 470         memset(wstats, 0, sizeof(struct iw_statistics));
 471         wstats->qual.updated = IW_QUAL_ALL_INVALID;
 472
 473         del_timer_sync(&iwm->watchdog);
 474 }
 475
 476 static void iwm_bss_list_clean(struct iwm_priv *iwm)
 477 {
 478         struct iwm_bss_info *bss, *next;
 479
 480         list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
 481                 list_del(&bss->node);
 482                 kfree(bss->bss);
 483                 kfree(bss);
 484         }
 485 }
 486
 487 static int iwm_channels_init(struct iwm_priv *iwm)
 488 {
 489         int ret;
 490
 491 #ifdef CONFIG_IWM_B0_HW_SUPPORT
 492         if (iwm->conf.hw_b0) {
 493                 IWM_INFO(iwm, "Workaround EEPROM channels for B0 hardware\n");
 494                 return 0;
 495         }
 496 #endif
 497
 498         ret = iwm_send_umac_channel_list(iwm);
 499         if (ret) {
 500                 IWM_ERR(iwm, "Send channel list failed\n");
 501                 return ret;
 502         }
 503
 504         ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
 505                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 506         if (ret) {
 507                 IWM_ERR(iwm, "Didn't get a channel list notification\n");
 508                 return ret;
 509         }
 510
 511         return 0;
 512 }
 513
 514 int iwm_up(struct iwm_priv *iwm)
 515 {
 516         int ret;
 517         struct iwm_notif *notif_reboot, *notif_ack = NULL;
 518
 519         ret = iwm_bus_enable(iwm);
 520         if (ret) {
 521                 IWM_ERR(iwm, "Couldn't enable function\n");
 522                 return ret;
 523         }
 524
 525         iwm_rx_setup_handlers(iwm);
 526
 527         /* Wait for initial BARKER_REBOOT from hardware */
 528         notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
 529                                       IWM_SRC_UDMA, 2 * HZ);
 530         if (!notif_reboot) {
 531                 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
 532                 goto err_disable;
 533         }
 534
 535         /* We send the barker back */
 536         ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
 537         if (ret) {
 538                 IWM_ERR(iwm, "REBOOT barker response failed\n");
 539                 kfree(notif_reboot);
 540                 goto err_disable;
 541         }
 542
 543         kfree(notif_reboot->buf);
 544         kfree(notif_reboot);
 545
 546         /* Wait for ACK_BARKER from hardware */
 547         notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
 548                                    IWM_SRC_UDMA, 2 * HZ);
 549         if (!notif_ack) {
 550                 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
 551                 goto err_disable;
 552         }
 553
 554         kfree(notif_ack->buf);
 555         kfree(notif_ack);
 556
 557         /* We start to config static boot parameters */
 558         ret = iwm_config_boot_params(iwm);
 559         if (ret) {
 560                 IWM_ERR(iwm, "Config boot parameters failed\n");
 561                 goto err_disable;
 562         }
 563
 564         ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
 565         if (ret) {
 566                 IWM_ERR(iwm, "MAC reading failed\n");
 567                 goto err_disable;
 568         }
 569
 570         /* We can load the FWs */
 571         ret = iwm_load_fw(iwm);
 572         if (ret) {
 573                 IWM_ERR(iwm, "FW loading failed\n");
 574                 goto err_disable;
 575         }
 576
 577         /* We configure the UMAC and enable the wifi module */
 578         ret = iwm_send_umac_config(iwm,
 579                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
 580                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
 581                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
 582         if (ret) {
 583                 IWM_ERR(iwm, "UMAC config failed\n");
 584                 goto err_fw;
 585         }
 586
 587         ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 588                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 589         if (ret) {
 590                 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
 591                 goto err_fw;
 592         }
 593
 594         if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 595                                   UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 596                 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
 597                              iwm->core_enabled);
 598                 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 599                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 600                 if (ret) {
 601                         IWM_ERR(iwm, "Didn't get a core status notification\n");
 602                         goto err_fw;
 603                 }
 604
 605                 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 606                                           UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 607                         IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
 608                                 iwm->core_enabled);
 609                         goto err_fw;
 610                 } else {
 611                         IWM_INFO(iwm, "All cores enabled\n");
 612                 }
 613         }
 614
 615         iwm->umac_profile = kmalloc(sizeof(struct iwm_umac_profile),
 616                                     GFP_KERNEL);
 617         if (!iwm->umac_profile) {
 618                 IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
 619                 goto err_fw;
 620         }
 621
 622         iwm_init_default_profile(iwm, iwm->umac_profile);
 623
 624         ret = iwm_channels_init(iwm);
 625         if (ret < 0) {
 626                 IWM_ERR(iwm, "Couldn't init channels\n");
 627                 goto err_profile;
 628         }
 629
 630         /* Set the READY bit to indicate interface is brought up successfully */
 631         set_bit(IWM_STATUS_READY, &iwm->status);
 632
 633         return 0;
 634
 635  err_profile:
 636         kfree(iwm->umac_profile);
 637         iwm->umac_profile = NULL;
 638
 639  err_fw:
 640         iwm_eeprom_exit(iwm);
 641
 642  err_disable:
 643         ret = iwm_bus_disable(iwm);
 644         if (ret < 0)
 645                 IWM_ERR(iwm, "Couldn't disable function\n");
 646
 647         return -EIO;
 648 }
 649
 650 int iwm_down(struct iwm_priv *iwm)
 651 {
 652         int ret;
 653
 654         /* The interface is already down */
 655         if (!test_bit(IWM_STATUS_READY, &iwm->status))
 656                 return 0;
 657
 658         if (iwm->scan_request) {
 659                 cfg80211_scan_done(iwm->scan_request, true);
 660                 iwm->scan_request = NULL;
 661         }
 662
 663         clear_bit(IWM_STATUS_READY, &iwm->status);
 664
 665         iwm_eeprom_exit(iwm);
 666         kfree(iwm->umac_profile);
 667         iwm->umac_profile = NULL;
 668         iwm_bss_list_clean(iwm);
 669
 670         iwm->default_key = NULL;
 671         iwm->core_enabled = 0;
 672
 673         ret = iwm_bus_disable(iwm);
 674         if (ret < 0) {
 675                 IWM_ERR(iwm, "Couldn't disable function\n");
 676                 return ret;
 677         }
 678
 679         return 0;
 680 }