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