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 int __iwm_up(struct iwm_priv *iwm);
 116 int __iwm_down(struct iwm_priv *iwm);
 117
 118 static void iwm_reset_worker(struct work_struct *work)
 119 {
 120         struct iwm_priv *iwm;
 121         struct iwm_umac_profile *profile = NULL;
 122         int uninitialized_var(ret), retry = 0;
 123
 124         iwm = container_of(work, struct iwm_priv, reset_worker);
 125
 126         /*
 127          * XXX: The iwm->mutex is introduced purely for this reset work,
 128          * because the other users for iwm_up and iwm_down are only netdev
 129          * ndo_open and ndo_stop which are already protected by rtnl.
 130          * Please remove iwm->mutex together if iwm_reset_worker() is not
 131          * required in the future.
 132          */
 133         if (!mutex_trylock(&iwm->mutex)) {
 134                 IWM_WARN(iwm, "We are in the middle of interface bringing "
 135                          "UP/DOWN. Skip driver resetting.\n");
 136                 return;
 137         }
 138
 139         if (iwm->umac_profile_active) {
 140                 profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
 141                 if (profile)
 142                         memcpy(profile, iwm->umac_profile, sizeof(*profile));
 143                 else
 144                         IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
 145         }
 146
 147         __iwm_down(iwm);
 148
 149         while (retry++ < 3) {
 150                 ret = __iwm_up(iwm);
 151                 if (!ret)
 152                         break;
 153
 154                 schedule_timeout_uninterruptible(10 * HZ);
 155         }
 156
 157         if (ret) {
 158                 IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);
 159
 160                 kfree(profile);
 161                 goto out;
 162         }
 163
 164         if (profile) {
 165                 IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
 166                 memcpy(iwm->umac_profile, profile, sizeof(*profile));
 167                 iwm_send_mlme_profile(iwm);
 168                 kfree(profile);
 169         }
 170
 171  out:
 172         mutex_unlock(&iwm->mutex);
 173 }
 174
 175 static void iwm_watchdog(unsigned long data)
 176 {
 177         struct iwm_priv *iwm = (struct iwm_priv *)data;
 178
 179         IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");
 180
 181         if (modparam_reset)
 182                 schedule_work(&iwm->reset_worker);
 183 }
 184
 185 int iwm_priv_init(struct iwm_priv *iwm)
 186 {
 187         int i;
 188         char name[32];
 189
 190         iwm->status = 0;
 191         INIT_LIST_HEAD(&iwm->pending_notif);
 192         init_waitqueue_head(&iwm->notif_queue);
 193         init_waitqueue_head(&iwm->nonwifi_queue);
 194         init_waitqueue_head(&iwm->mlme_queue);
 195         memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
 196         spin_lock_init(&iwm->tx_credit.lock);
 197         INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
 198         INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
 199         iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
 200         iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
 201         spin_lock_init(&iwm->cmd_lock);
 202         iwm->scan_id = 1;
 203         INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
 204         INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
 205         INIT_LIST_HEAD(&iwm->bss_list);
 206
 207         skb_queue_head_init(&iwm->rx_list);
 208         INIT_LIST_HEAD(&iwm->rx_tickets);
 209         for (i = 0; i < IWM_RX_ID_HASH; i++)
 210                 INIT_LIST_HEAD(&iwm->rx_packets[i]);
 211
 212         INIT_WORK(&iwm->rx_worker, iwm_rx_worker);
 213
 214         iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
 215         if (!iwm->rx_wq)
 216                 return -EAGAIN;
 217
 218         for (i = 0; i < IWM_TX_QUEUES; i++) {
 219                 INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
 220                 snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
 221                 iwm->txq[i].id = i;
 222                 iwm->txq[i].wq = create_singlethread_workqueue(name);
 223                 if (!iwm->txq[i].wq)
 224                         return -EAGAIN;
 225
 226                 skb_queue_head_init(&iwm->txq[i].queue);
 227         }
 228
 229         for (i = 0; i < IWM_NUM_KEYS; i++)
 230                 memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
 231
 232         iwm->default_key = NULL;
 233
 234         init_timer(&iwm->watchdog);
 235         iwm->watchdog.function = iwm_watchdog;
 236         iwm->watchdog.data = (unsigned long)iwm;
 237         mutex_init(&iwm->mutex);
 238
 239         return 0;
 240 }
 241
 242 void iwm_priv_deinit(struct iwm_priv *iwm)
 243 {
 244         int i;
 245
 246         for (i = 0; i < IWM_TX_QUEUES; i++)
 247                 destroy_workqueue(iwm->txq[i].wq);
 248
 249         destroy_workqueue(iwm->rx_wq);
 250 }
 251
 252 /*
 253  * We reset all the structures, and we reset the UMAC.
 254  * After calling this routine, you're expected to reload
 255  * the firmware.
 256  */
 257 void iwm_reset(struct iwm_priv *iwm)
 258 {
 259         struct iwm_notif *notif, *next;
 260
 261         if (test_bit(IWM_STATUS_READY, &iwm->status))
 262                 iwm_target_reset(iwm);
 263
 264         iwm->status = 0;
 265         iwm->scan_id = 1;
 266
 267         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 268                 list_del(&notif->pending);
 269                 kfree(notif->buf);
 270                 kfree(notif);
 271         }
 272
 273         iwm_cmd_flush(iwm);
 274
 275         flush_workqueue(iwm->rx_wq);
 276
 277         iwm_link_off(iwm);
 278 }
 279
 280 /*
 281  * Notification code:
 282  *
 283  * We're faced with the following issue: Any host command can
 284  * have an answer or not, and if there's an answer to expect,
 285  * it can be treated synchronously or asynchronously.
 286  * To work around the synchronous answer case, we implemented
 287  * our notification mechanism.
 288  * When a code path needs to wait for a command response
 289  * synchronously, it calls notif_handle(), which waits for the
 290  * right notification to show up, and then process it. Before
 291  * starting to wait, it registered as a waiter for this specific
 292  * answer (by toggling a bit in on of the handler_map), so that
 293  * the rx code knows that it needs to send a notification to the
 294  * waiting processes. It does so by calling iwm_notif_send(),
 295  * which adds the notification to the pending notifications list,
 296  * and then wakes the waiting processes up.
 297  */
 298 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
 299                    u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
 300 {
 301         struct iwm_notif *notif;
 302
 303         notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
 304         if (!notif) {
 305                 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
 306                 return -ENOMEM;
 307         }
 308
 309         INIT_LIST_HEAD(&notif->pending);
 310         notif->cmd = cmd;
 311         notif->cmd_id = cmd_id;
 312         notif->src = source;
 313         notif->buf = kzalloc(buf_size, GFP_KERNEL);
 314         if (!notif->buf) {
 315                 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
 316                 kfree(notif);
 317                 return -ENOMEM;
 318         }
 319         notif->buf_size = buf_size;
 320         memcpy(notif->buf, buf, buf_size);
 321         list_add_tail(&notif->pending, &iwm->pending_notif);
 322
 323         wake_up_interruptible(&iwm->notif_queue);
 324
 325         return 0;
 326 }
 327
 328 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
 329                                         u8 source)
 330 {
 331         struct iwm_notif *notif, *next;
 332
 333         list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 334                 if ((notif->cmd_id == cmd) && (notif->src == source)) {
 335                         list_del(&notif->pending);
 336                         return notif;
 337                 }
 338         }
 339
 340         return NULL;
 341 }
 342
 343 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
 344                                         u8 source, long timeout)
 345 {
 346         int ret;
 347         struct iwm_notif *notif;
 348         unsigned long *map = NULL;
 349
 350         switch (source) {
 351         case IWM_SRC_LMAC:
 352                 map = &iwm->lmac_handler_map[0];
 353                 break;
 354         case IWM_SRC_UMAC:
 355                 map = &iwm->umac_handler_map[0];
 356                 break;
 357         case IWM_SRC_UDMA:
 358                 map = &iwm->udma_handler_map[0];
 359                 break;
 360         }
 361
 362         set_bit(cmd, map);
 363
 364         ret = wait_event_interruptible_timeout(iwm->notif_queue,
 365                          ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
 366                                                timeout);
 367         clear_bit(cmd, map);
 368
 369         if (!ret)
 370                 return NULL;
 371
 372         return notif;
 373 }
 374
 375 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
 376 {
 377         int ret;
 378         struct iwm_notif *notif;
 379
 380         notif = iwm_notif_wait(iwm, cmd, source, timeout);
 381         if (!notif)
 382                 return -ETIME;
 383
 384         ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
 385         kfree(notif->buf);
 386         kfree(notif);
 387
 388         return ret;
 389 }
 390
 391 static int iwm_config_boot_params(struct iwm_priv *iwm)
 392 {
 393         struct iwm_udma_nonwifi_cmd target_cmd;
 394         int ret;
 395
 396         /* check Wimax is off and config debug monitor */
 397         if (iwm->conf.wimax_not_present) {
 398                 u32 data1 = 0x1f;
 399                 u32 addr1 = 0x606BE258;
 400
 401                 u32 data2_set = 0x0;
 402                 u32 data2_clr = 0x1;
 403                 u32 addr2 = 0x606BE100;
 404
 405                 u32 data3 = 0x1;
 406                 u32 addr3 = 0x606BEC00;
 407
 408                 target_cmd.resp = 0;
 409                 target_cmd.handle_by_hw = 0;
 410                 target_cmd.eop = 1;
 411
 412                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 413                 target_cmd.addr = cpu_to_le32(addr1);
 414                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 415                 target_cmd.op2 = 0;
 416
 417                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 418                 if (ret < 0) {
 419                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 420                         return ret;
 421                 }
 422
 423                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
 424                 target_cmd.addr = cpu_to_le32(addr2);
 425                 target_cmd.op1_sz = cpu_to_le32(data2_set);
 426                 target_cmd.op2 = cpu_to_le32(data2_clr);
 427
 428                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 429                 if (ret < 0) {
 430                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 431                         return ret;
 432                 }
 433
 434                 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 435                 target_cmd.addr = cpu_to_le32(addr3);
 436                 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 437                 target_cmd.op2 = 0;
 438
 439                 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
 440                 if (ret < 0) {
 441                         IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 442                         return ret;
 443                 }
 444         }
 445
 446         return 0;
 447 }
 448
 449 void iwm_init_default_profile(struct iwm_priv *iwm,
 450                               struct iwm_umac_profile *profile)
 451 {
 452         memset(profile, 0, sizeof(struct iwm_umac_profile));
 453
 454         profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
 455         profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
 456         profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
 457         profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
 458
 459         if (iwm->conf.enable_qos)
 460                 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
 461
 462         profile->wireless_mode = iwm->conf.wireless_mode;
 463         profile->mode = cpu_to_le32(iwm->conf.mode);
 464
 465         profile->ibss.atim = 0;
 466         profile->ibss.beacon_interval = 100;
 467         profile->ibss.join_only = 0;
 468         profile->ibss.band = iwm->conf.ibss_band;
 469         profile->ibss.channel = iwm->conf.ibss_channel;
 470 }
 471
 472 void iwm_link_on(struct iwm_priv *iwm)
 473 {
 474         netif_carrier_on(iwm_to_ndev(iwm));
 475         netif_tx_wake_all_queues(iwm_to_ndev(iwm));
 476
 477         iwm_send_umac_stats_req(iwm, 0);
 478 }
 479
 480 void iwm_link_off(struct iwm_priv *iwm)
 481 {
 482         struct iw_statistics *wstats = &iwm->wstats;
 483         int i;
 484
 485         netif_tx_stop_all_queues(iwm_to_ndev(iwm));
 486         netif_carrier_off(iwm_to_ndev(iwm));
 487
 488         for (i = 0; i < IWM_TX_QUEUES; i++) {
 489                 skb_queue_purge(&iwm->txq[i].queue);
 490
 491                 iwm->txq[i].concat_count = 0;
 492                 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
 493
 494                 flush_workqueue(iwm->txq[i].wq);
 495         }
 496
 497         iwm_rx_free(iwm);
 498
 499         cancel_delayed_work_sync(&iwm->stats_request);
 500         memset(wstats, 0, sizeof(struct iw_statistics));
 501         wstats->qual.updated = IW_QUAL_ALL_INVALID;
 502
 503         del_timer_sync(&iwm->watchdog);
 504 }
 505
 506 static void iwm_bss_list_clean(struct iwm_priv *iwm)
 507 {
 508         struct iwm_bss_info *bss, *next;
 509
 510         list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
 511                 list_del(&bss->node);
 512                 kfree(bss->bss);
 513                 kfree(bss);
 514         }
 515 }
 516
 517 static int iwm_channels_init(struct iwm_priv *iwm)
 518 {
 519         int ret;
 520
 521 #ifdef CONFIG_IWM_B0_HW_SUPPORT
 522         if (iwm->conf.hw_b0) {
 523                 IWM_INFO(iwm, "Workaround EEPROM channels for B0 hardware\n");
 524                 return 0;
 525         }
 526 #endif
 527
 528         ret = iwm_send_umac_channel_list(iwm);
 529         if (ret) {
 530                 IWM_ERR(iwm, "Send channel list failed\n");
 531                 return ret;
 532         }
 533
 534         ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
 535                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 536         if (ret) {
 537                 IWM_ERR(iwm, "Didn't get a channel list notification\n");
 538                 return ret;
 539         }
 540
 541         return 0;
 542 }
 543
 544 int __iwm_up(struct iwm_priv *iwm)
 545 {
 546         int ret;
 547         struct iwm_notif *notif_reboot, *notif_ack = NULL;
 548
 549         ret = iwm_bus_enable(iwm);
 550         if (ret) {
 551                 IWM_ERR(iwm, "Couldn't enable function\n");
 552                 return ret;
 553         }
 554
 555         iwm_rx_setup_handlers(iwm);
 556
 557         /* Wait for initial BARKER_REBOOT from hardware */
 558         notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
 559                                       IWM_SRC_UDMA, 2 * HZ);
 560         if (!notif_reboot) {
 561                 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
 562                 goto err_disable;
 563         }
 564
 565         /* We send the barker back */
 566         ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
 567         if (ret) {
 568                 IWM_ERR(iwm, "REBOOT barker response failed\n");
 569                 kfree(notif_reboot);
 570                 goto err_disable;
 571         }
 572
 573         kfree(notif_reboot->buf);
 574         kfree(notif_reboot);
 575
 576         /* Wait for ACK_BARKER from hardware */
 577         notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
 578                                    IWM_SRC_UDMA, 2 * HZ);
 579         if (!notif_ack) {
 580                 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
 581                 goto err_disable;
 582         }
 583
 584         kfree(notif_ack->buf);
 585         kfree(notif_ack);
 586
 587         /* We start to config static boot parameters */
 588         ret = iwm_config_boot_params(iwm);
 589         if (ret) {
 590                 IWM_ERR(iwm, "Config boot parameters failed\n");
 591                 goto err_disable;
 592         }
 593
 594         ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
 595         if (ret) {
 596                 IWM_ERR(iwm, "MAC reading failed\n");
 597                 goto err_disable;
 598         }
 599
 600         /* We can load the FWs */
 601         ret = iwm_load_fw(iwm);
 602         if (ret) {
 603                 IWM_ERR(iwm, "FW loading failed\n");
 604                 goto err_disable;
 605         }
 606
 607         /* We configure the UMAC and enable the wifi module */
 608         ret = iwm_send_umac_config(iwm,
 609                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
 610                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
 611                         cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
 612         if (ret) {
 613                 IWM_ERR(iwm, "UMAC config failed\n");
 614                 goto err_fw;
 615         }
 616
 617         ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 618                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 619         if (ret) {
 620                 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
 621                 goto err_fw;
 622         }
 623
 624         if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 625                                   UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 626                 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
 627                              iwm->core_enabled);
 628                 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 629                                IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 630                 if (ret) {
 631                         IWM_ERR(iwm, "Didn't get a core status notification\n");
 632                         goto err_fw;
 633                 }
 634
 635                 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 636                                           UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 637                         IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
 638                                 iwm->core_enabled);
 639                         goto err_fw;
 640                 } else {
 641                         IWM_INFO(iwm, "All cores enabled\n");
 642                 }
 643         }
 644
 645         iwm->umac_profile = kmalloc(sizeof(struct iwm_umac_profile),
 646                                     GFP_KERNEL);
 647         if (!iwm->umac_profile) {
 648                 IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
 649                 goto err_fw;
 650         }
 651
 652         iwm_init_default_profile(iwm, iwm->umac_profile);
 653
 654         ret = iwm_channels_init(iwm);
 655         if (ret < 0) {
 656                 IWM_ERR(iwm, "Couldn't init channels\n");
 657                 goto err_profile;
 658         }
 659
 660         /* Set the READY bit to indicate interface is brought up successfully */
 661         set_bit(IWM_STATUS_READY, &iwm->status);
 662
 663         return 0;
 664
 665  err_profile:
 666         kfree(iwm->umac_profile);
 667         iwm->umac_profile = NULL;
 668
 669  err_fw:
 670         iwm_eeprom_exit(iwm);
 671
 672  err_disable:
 673         ret = iwm_bus_disable(iwm);
 674         if (ret < 0)
 675                 IWM_ERR(iwm, "Couldn't disable function\n");
 676
 677         return -EIO;
 678 }
 679
 680 int iwm_up(struct iwm_priv *iwm)
 681 {
 682         int ret;
 683
 684         mutex_lock(&iwm->mutex);
 685         ret = __iwm_up(iwm);
 686         mutex_unlock(&iwm->mutex);
 687
 688         return ret;
 689 }
 690
 691 int __iwm_down(struct iwm_priv *iwm)
 692 {
 693         int ret;
 694
 695         /* The interface is already down */
 696         if (!test_bit(IWM_STATUS_READY, &iwm->status))
 697                 return 0;
 698
 699         if (iwm->scan_request) {
 700                 cfg80211_scan_done(iwm->scan_request, true);
 701                 iwm->scan_request = NULL;
 702         }
 703
 704         clear_bit(IWM_STATUS_READY, &iwm->status);
 705
 706         iwm_eeprom_exit(iwm);
 707         kfree(iwm->umac_profile);
 708         iwm->umac_profile = NULL;
 709         iwm_bss_list_clean(iwm);
 710
 711         iwm->default_key = NULL;
 712         iwm->core_enabled = 0;
 713
 714         ret = iwm_bus_disable(iwm);
 715         if (ret < 0) {
 716                 IWM_ERR(iwm, "Couldn't disable function\n");
 717                 return ret;
 718         }
 719
 720         return 0;
 721 }
 722
 723 int iwm_down(struct iwm_priv *iwm)
 724 {
 725         int ret;
 726
 727         mutex_lock(&iwm->mutex);
 728         ret = __iwm_down(iwm);
 729         mutex_unlock(&iwm->mutex);
 730
 731         return ret;
 732 }