drivers/net/wireless/iwlwifi/mvm/ops.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/module.h>
  64 #include <net/mac80211.h>
  65
  66 #include "iwl-notif-wait.h"
  67 #include "iwl-trans.h"
  68 #include "iwl-op-mode.h"
  69 #include "iwl-fw.h"
  70 #include "iwl-debug.h"
  71 #include "iwl-drv.h"
  72 #include "iwl-modparams.h"
  73 #include "mvm.h"
  74 #include "iwl-phy-db.h"
  75 #include "iwl-eeprom-parse.h"
  76 #include "iwl-csr.h"
  77 #include "iwl-io.h"
  78 #include "iwl-prph.h"
  79 #include "rs.h"
  80 #include "fw-api-scan.h"
  81 #include "time-event.h"
  82
  83 /*
  84  * module name, copyright, version, etc.
  85  */
  86 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  87
  88 #define DRV_VERSION     IWLWIFI_VERSION
  89
  90 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  91 MODULE_VERSION(DRV_VERSION);
  92 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  93 MODULE_LICENSE("GPL");
  94
  95 static const struct iwl_op_mode_ops iwl_mvm_ops;
  96
  97 struct iwl_mvm_mod_params iwlmvm_mod_params = {
  98         .power_scheme = IWL_POWER_SCHEME_BPS,
  99         /* rest of fields are 0 by default */
 100 };
 101
 102 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 103 MODULE_PARM_DESC(init_dbg,
 104                  "set to true to debug an ASSERT in INIT fw (default: false");
 105 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 106 MODULE_PARM_DESC(power_scheme,
 107                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 108
 109 /*
 110  * module init and exit functions
 111  */
 112 static int __init iwl_mvm_init(void)
 113 {
 114         int ret;
 115
 116         ret = iwl_mvm_rate_control_register();
 117         if (ret) {
 118                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 119                 return ret;
 120         }
 121
 122         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 123
 124         if (ret) {
 125                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 126                 iwl_mvm_rate_control_unregister();
 127         }
 128
 129         return ret;
 130 }
 131 module_init(iwl_mvm_init);
 132
 133 static void __exit iwl_mvm_exit(void)
 134 {
 135         iwl_opmode_deregister("iwlmvm");
 136         iwl_mvm_rate_control_unregister();
 137 }
 138 module_exit(iwl_mvm_exit);
 139
 140 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 141 {
 142         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 143         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 144         u32 reg_val = 0;
 145
 146         radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 147                           FW_PHY_CFG_RADIO_TYPE_POS;
 148         radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
 149                           FW_PHY_CFG_RADIO_STEP_POS;
 150         radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
 151                           FW_PHY_CFG_RADIO_DASH_POS;
 152
 153         /* SKU control */
 154         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 155                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 156         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 157                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 158
 159         /* radio configuration */
 160         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 161         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 162         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 163
 164         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 165                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 166
 167         /* silicon bits */
 168         reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 169
 170         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 171                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 172                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 173                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 174                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 175                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 176                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 177                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 178                                 reg_val);
 179
 180         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 181                        radio_cfg_step, radio_cfg_dash);
 182
 183         /*
 184          * W/A : NIC is stuck in a reset state after Early PCIe power off
 185          * (PCIe power is lost before PERST# is asserted), causing ME FW
 186          * to lose ownership and not being able to obtain it back.
 187          */
 188         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 189                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 190                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 191                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 192 }
 193
 194 struct iwl_rx_handlers {
 195         u8 cmd_id;
 196         bool async;
 197         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 198                   struct iwl_device_cmd *cmd);
 199 };
 200
 201 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 202         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 203
 204 /*
 205  * Handlers for fw notifications
 206  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 207  * This list should be in order of frequency for performance purposes.
 208  *
 209  * The handler can be SYNC - this means that it will be called in the Rx path
 210  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 211  * only in this case!), it should be set as ASYNC. In that case, it will be
 212  * called from a worker with mvm->mutex held.
 213  */
 214 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 215         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 216         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 217         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 218         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 219
 220         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 221         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false),
 222         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 223
 224         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 225
 226         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 227
 228         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 229         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, false),
 230         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 231                    iwl_mvm_rx_scan_offload_complete_notif, true),
 232         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_sched_scan_results,
 233                    false),
 234
 235         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 236         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 237
 238         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 239                    false),
 240
 241         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 242         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 243                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 244 };
 245 #undef RX_HANDLER
 246 #define CMD(x) [x] = #x
 247
 248 static const char *iwl_mvm_cmd_strings[REPLY_MAX] = {
 249         CMD(MVM_ALIVE),
 250         CMD(REPLY_ERROR),
 251         CMD(INIT_COMPLETE_NOTIF),
 252         CMD(PHY_CONTEXT_CMD),
 253         CMD(MGMT_MCAST_KEY),
 254         CMD(TX_CMD),
 255         CMD(TXPATH_FLUSH),
 256         CMD(MAC_CONTEXT_CMD),
 257         CMD(TIME_EVENT_CMD),
 258         CMD(TIME_EVENT_NOTIFICATION),
 259         CMD(BINDING_CONTEXT_CMD),
 260         CMD(TIME_QUOTA_CMD),
 261         CMD(NON_QOS_TX_COUNTER_CMD),
 262         CMD(RADIO_VERSION_NOTIFICATION),
 263         CMD(SCAN_REQUEST_CMD),
 264         CMD(SCAN_ABORT_CMD),
 265         CMD(SCAN_START_NOTIFICATION),
 266         CMD(SCAN_RESULTS_NOTIFICATION),
 267         CMD(SCAN_COMPLETE_NOTIFICATION),
 268         CMD(NVM_ACCESS_CMD),
 269         CMD(PHY_CONFIGURATION_CMD),
 270         CMD(CALIB_RES_NOTIF_PHY_DB),
 271         CMD(SET_CALIB_DEFAULT_CMD),
 272         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 273         CMD(ADD_STA_KEY),
 274         CMD(ADD_STA),
 275         CMD(REMOVE_STA),
 276         CMD(LQ_CMD),
 277         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 278         CMD(MATCH_FOUND_NOTIFICATION),
 279         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 280         CMD(SCAN_OFFLOAD_ABORT_CMD),
 281         CMD(SCAN_OFFLOAD_COMPLETE),
 282         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 283         CMD(POWER_TABLE_CMD),
 284         CMD(WEP_KEY),
 285         CMD(REPLY_RX_PHY_CMD),
 286         CMD(REPLY_RX_MPDU_CMD),
 287         CMD(BEACON_NOTIFICATION),
 288         CMD(BEACON_TEMPLATE_CMD),
 289         CMD(STATISTICS_NOTIFICATION),
 290         CMD(EOSP_NOTIFICATION),
 291         CMD(REDUCE_TX_POWER_CMD),
 292         CMD(TX_ANT_CONFIGURATION_CMD),
 293         CMD(D3_CONFIG_CMD),
 294         CMD(D0I3_END_CMD),
 295         CMD(PROT_OFFLOAD_CONFIG_CMD),
 296         CMD(OFFLOADS_QUERY_CMD),
 297         CMD(REMOTE_WAKE_CONFIG_CMD),
 298         CMD(WOWLAN_PATTERNS),
 299         CMD(WOWLAN_CONFIGURATION),
 300         CMD(WOWLAN_TSC_RSC_PARAM),
 301         CMD(WOWLAN_TKIP_PARAM),
 302         CMD(WOWLAN_KEK_KCK_MATERIAL),
 303         CMD(WOWLAN_GET_STATUSES),
 304         CMD(WOWLAN_TX_POWER_PER_DB),
 305         CMD(NET_DETECT_CONFIG_CMD),
 306         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 307         CMD(NET_DETECT_PROFILES_CMD),
 308         CMD(NET_DETECT_HOTSPOTS_CMD),
 309         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 310         CMD(CARD_STATE_NOTIFICATION),
 311         CMD(MISSED_BEACONS_NOTIFICATION),
 312         CMD(BT_COEX_PRIO_TABLE),
 313         CMD(BT_COEX_PROT_ENV),
 314         CMD(BT_PROFILE_NOTIFICATION),
 315         CMD(BT_CONFIG),
 316         CMD(MCAST_FILTER_CMD),
 317         CMD(BCAST_FILTER_CMD),
 318         CMD(REPLY_SF_CFG_CMD),
 319         CMD(REPLY_BEACON_FILTERING_CMD),
 320         CMD(REPLY_THERMAL_MNG_BACKOFF),
 321         CMD(MAC_PM_POWER_TABLE),
 322         CMD(BT_COEX_CI),
 323         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 324 };
 325 #undef CMD
 326
 327 /* this forward declaration can avoid to export the function */
 328 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 329 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 330
 331 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 332 {
 333         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 334
 335         if (!pwr_tx_backoff)
 336                 return 0;
 337
 338         while (pwr_tx_backoff->pwr) {
 339                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 340                         return pwr_tx_backoff->backoff;
 341
 342                 pwr_tx_backoff++;
 343         }
 344
 345         return 0;
 346 }
 347
 348 static struct iwl_op_mode *
 349 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 350                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 351 {
 352         struct ieee80211_hw *hw;
 353         struct iwl_op_mode *op_mode;
 354         struct iwl_mvm *mvm;
 355         struct iwl_trans_config trans_cfg = {};
 356         static const u8 no_reclaim_cmds[] = {
 357                 TX_CMD,
 358         };
 359         int err, scan_size;
 360         u32 min_backoff;
 361
 362         /*
 363          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 364          * index all over the driver - check that its value corresponds to the
 365          * array size.
 366          */
 367         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 368
 369         /********************************
 370          * 1. Allocating and configuring HW data
 371          ********************************/
 372         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 373                                 sizeof(struct iwl_mvm),
 374                                 &iwl_mvm_hw_ops);
 375         if (!hw)
 376                 return NULL;
 377
 378         op_mode = hw->priv;
 379         op_mode->ops = &iwl_mvm_ops;
 380
 381         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 382         mvm->dev = trans->dev;
 383         mvm->trans = trans;
 384         mvm->cfg = cfg;
 385         mvm->fw = fw;
 386         mvm->hw = hw;
 387
 388         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 389
 390         mvm->aux_queue = 15;
 391         mvm->first_agg_queue = 16;
 392         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 393         if (mvm->cfg->base_params->num_of_queues == 16) {
 394                 mvm->aux_queue = 11;
 395                 mvm->first_agg_queue = 12;
 396         }
 397         mvm->sf_state = SF_UNINIT;
 398
 399         mutex_init(&mvm->mutex);
 400         spin_lock_init(&mvm->async_handlers_lock);
 401         INIT_LIST_HEAD(&mvm->time_event_list);
 402         INIT_LIST_HEAD(&mvm->async_handlers_list);
 403         spin_lock_init(&mvm->time_event_lock);
 404
 405         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 406         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 407         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 408         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 409
 410         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 411
 412         /*
 413          * Populate the state variables that the transport layer needs
 414          * to know about.
 415          */
 416         trans_cfg.op_mode = op_mode;
 417         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 418         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 419         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 420
 421         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 422                 trans_cfg.bc_table_dword = true;
 423
 424         if (!iwlwifi_mod_params.wd_disable)
 425                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 426         else
 427                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 428
 429         trans_cfg.command_names = iwl_mvm_cmd_strings;
 430
 431         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 432         trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
 433
 434         snprintf(mvm->hw->wiphy->fw_version,
 435                  sizeof(mvm->hw->wiphy->fw_version),
 436                  "%s", fw->fw_version);
 437
 438         /* Configure transport layer */
 439         iwl_trans_configure(mvm->trans, &trans_cfg);
 440
 441         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 442         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 443
 444         /* set up notification wait support */
 445         iwl_notification_wait_init(&mvm->notif_wait);
 446
 447         /* Init phy db */
 448         mvm->phy_db = iwl_phy_db_init(trans);
 449         if (!mvm->phy_db) {
 450                 IWL_ERR(mvm, "Cannot init phy_db\n");
 451                 goto out_free;
 452         }
 453
 454         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 455                  mvm->cfg->name, mvm->trans->hw_rev);
 456
 457         min_backoff = calc_min_backoff(trans, cfg);
 458         iwl_mvm_tt_initialize(mvm, min_backoff);
 459
 460         /*
 461          * If the NVM exists in an external file,
 462          * there is no need to unnecessarily power up the NIC at driver load
 463          */
 464         if (iwlwifi_mod_params.nvm_file) {
 465                 err = iwl_nvm_init(mvm);
 466                 if (err)
 467                         goto out_free;
 468         } else {
 469                 err = iwl_trans_start_hw(mvm->trans);
 470                 if (err)
 471                         goto out_free;
 472
 473                 mutex_lock(&mvm->mutex);
 474                 err = iwl_run_init_mvm_ucode(mvm, true);
 475                 iwl_trans_stop_device(trans);
 476                 mutex_unlock(&mvm->mutex);
 477                 /* returns 0 if successful, 1 if success but in rfkill */
 478                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 479                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 480                         goto out_free;
 481                 }
 482         }
 483
 484         scan_size = sizeof(struct iwl_scan_cmd) +
 485                 mvm->fw->ucode_capa.max_probe_length +
 486                 (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel));
 487         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 488         if (!mvm->scan_cmd)
 489                 goto out_free;
 490
 491         err = iwl_mvm_mac_setup_register(mvm);
 492         if (err)
 493                 goto out_free;
 494
 495         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 496         if (err)
 497                 goto out_unregister;
 498
 499         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PM_CMD_SUPPORT)
 500                 mvm->pm_ops = &pm_mac_ops;
 501         else
 502                 mvm->pm_ops = &pm_legacy_ops;
 503
 504         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 505
 506         /* rpm starts with a taken ref. only set the appropriate bit here. */
 507         set_bit(IWL_MVM_REF_UCODE_DOWN, mvm->ref_bitmap);
 508
 509         return op_mode;
 510
 511  out_unregister:
 512         ieee80211_unregister_hw(mvm->hw);
 513         iwl_mvm_leds_exit(mvm);
 514  out_free:
 515         iwl_phy_db_free(mvm->phy_db);
 516         kfree(mvm->scan_cmd);
 517         if (!iwlwifi_mod_params.nvm_file)
 518                 iwl_trans_op_mode_leave(trans);
 519         ieee80211_free_hw(mvm->hw);
 520         return NULL;
 521 }
 522
 523 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 524 {
 525         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 526         int i;
 527
 528         iwl_mvm_leds_exit(mvm);
 529
 530         iwl_mvm_tt_exit(mvm);
 531
 532         ieee80211_unregister_hw(mvm->hw);
 533
 534         kfree(mvm->scan_cmd);
 535         kfree(mvm->mcast_filter_cmd);
 536         mvm->mcast_filter_cmd = NULL;
 537
 538 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 539         kfree(mvm->d3_resume_sram);
 540 #endif
 541
 542         iwl_trans_op_mode_leave(mvm->trans);
 543
 544         iwl_phy_db_free(mvm->phy_db);
 545         mvm->phy_db = NULL;
 546
 547         iwl_free_nvm_data(mvm->nvm_data);
 548         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 549                 kfree(mvm->nvm_sections[i].data);
 550
 551         ieee80211_free_hw(mvm->hw);
 552 }
 553
 554 struct iwl_async_handler_entry {
 555         struct list_head list;
 556         struct iwl_rx_cmd_buffer rxb;
 557         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 558                   struct iwl_device_cmd *cmd);
 559 };
 560
 561 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 562 {
 563         struct iwl_async_handler_entry *entry, *tmp;
 564
 565         spin_lock_bh(&mvm->async_handlers_lock);
 566         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 567                 iwl_free_rxb(&entry->rxb);
 568                 list_del(&entry->list);
 569                 kfree(entry);
 570         }
 571         spin_unlock_bh(&mvm->async_handlers_lock);
 572 }
 573
 574 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 575 {
 576         struct iwl_mvm *mvm =
 577                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 578         struct iwl_async_handler_entry *entry, *tmp;
 579         struct list_head local_list;
 580
 581         INIT_LIST_HEAD(&local_list);
 582
 583         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 584         mutex_lock(&mvm->mutex);
 585
 586         /*
 587          * Sync with Rx path with a lock. Remove all the entries from this list,
 588          * add them to a local one (lock free), and then handle them.
 589          */
 590         spin_lock_bh(&mvm->async_handlers_lock);
 591         list_splice_init(&mvm->async_handlers_list, &local_list);
 592         spin_unlock_bh(&mvm->async_handlers_lock);
 593
 594         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 595                 if (entry->fn(mvm, &entry->rxb, NULL))
 596                         IWL_WARN(mvm,
 597                                  "returned value from ASYNC handlers are ignored\n");
 598                 iwl_free_rxb(&entry->rxb);
 599                 list_del(&entry->list);
 600                 kfree(entry);
 601         }
 602         mutex_unlock(&mvm->mutex);
 603 }
 604
 605 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 606                                struct iwl_rx_cmd_buffer *rxb,
 607                                struct iwl_device_cmd *cmd)
 608 {
 609         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 610         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 611         u8 i;
 612
 613         /*
 614          * Do the notification wait before RX handlers so
 615          * even if the RX handler consumes the RXB we have
 616          * access to it in the notification wait entry.
 617          */
 618         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 619
 620         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 621                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 622                 struct iwl_async_handler_entry *entry;
 623
 624                 if (rx_h->cmd_id != pkt->hdr.cmd)
 625                         continue;
 626
 627                 if (!rx_h->async)
 628                         return rx_h->fn(mvm, rxb, cmd);
 629
 630                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 631                 /* we can't do much... */
 632                 if (!entry)
 633                         return 0;
 634
 635                 entry->rxb._page = rxb_steal_page(rxb);
 636                 entry->rxb._offset = rxb->_offset;
 637                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 638                 entry->fn = rx_h->fn;
 639                 spin_lock(&mvm->async_handlers_lock);
 640                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 641                 spin_unlock(&mvm->async_handlers_lock);
 642                 schedule_work(&mvm->async_handlers_wk);
 643                 break;
 644         }
 645
 646         return 0;
 647 }
 648
 649 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 650 {
 651         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 652         int mq = mvm->queue_to_mac80211[queue];
 653
 654         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 655                 return;
 656
 657         if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
 658                 IWL_DEBUG_TX_QUEUES(mvm,
 659                                     "queue %d (mac80211 %d) already stopped\n",
 660                                     queue, mq);
 661                 return;
 662         }
 663
 664         set_bit(mq, &mvm->transport_queue_stop);
 665         ieee80211_stop_queue(mvm->hw, mq);
 666 }
 667
 668 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 669 {
 670         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 671         int mq = mvm->queue_to_mac80211[queue];
 672
 673         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 674                 return;
 675
 676         if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
 677                 IWL_DEBUG_TX_QUEUES(mvm,
 678                                     "queue %d (mac80211 %d) already awake\n",
 679                                     queue, mq);
 680                 return;
 681         }
 682
 683         clear_bit(mq, &mvm->transport_queue_stop);
 684
 685         ieee80211_wake_queue(mvm->hw, mq);
 686 }
 687
 688 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 689 {
 690         if (state)
 691                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 692         else
 693                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 694
 695         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 696 }
 697
 698 static void iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 699 {
 700         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 701
 702         if (state)
 703                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 704         else
 705                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 706
 707         if (state && mvm->cur_ucode != IWL_UCODE_INIT)
 708                 iwl_trans_stop_device(mvm->trans);
 709         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 710 }
 711
 712 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 713 {
 714         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 715         struct ieee80211_tx_info *info;
 716
 717         info = IEEE80211_SKB_CB(skb);
 718         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 719         ieee80211_free_txskb(mvm->hw, skb);
 720 }
 721
 722 struct iwl_mvm_reprobe {
 723         struct device *dev;
 724         struct work_struct work;
 725 };
 726
 727 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 728 {
 729         struct iwl_mvm_reprobe *reprobe;
 730
 731         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 732         if (device_reprobe(reprobe->dev))
 733                 dev_err(reprobe->dev, "reprobe failed!\n");
 734         kfree(reprobe);
 735         module_put(THIS_MODULE);
 736 }
 737
 738 static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
 739 {
 740         iwl_abort_notification_waits(&mvm->notif_wait);
 741
 742         /*
 743          * This is a bit racy, but worst case we tell mac80211 about
 744          * a stopped/aborted scan when that was already done which
 745          * is not a problem. It is necessary to abort any os scan
 746          * here because mac80211 requires having the scan cleared
 747          * before restarting.
 748          * We'll reset the scan_status to NONE in restart cleanup in
 749          * the next start() call from mac80211. If restart isn't called
 750          * (no fw restart) scan status will stay busy.
 751          */
 752         switch (mvm->scan_status) {
 753         case IWL_MVM_SCAN_NONE:
 754                 break;
 755         case IWL_MVM_SCAN_OS:
 756                 ieee80211_scan_completed(mvm->hw, true);
 757                 break;
 758         case IWL_MVM_SCAN_SCHED:
 759                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 760                 if (!mvm->restart_fw)
 761                         ieee80211_sched_scan_stopped(mvm->hw);
 762                 break;
 763         }
 764
 765         /*
 766          * If we're restarting already, don't cycle restarts.
 767          * If INIT fw asserted, it will likely fail again.
 768          * If WoWLAN fw asserted, don't restart either, mac80211
 769          * can't recover this since we're already half suspended.
 770          */
 771         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 772                 struct iwl_mvm_reprobe *reprobe;
 773
 774                 IWL_ERR(mvm,
 775                         "Firmware error during reconfiguration - reprobe!\n");
 776
 777                 /*
 778                  * get a module reference to avoid doing this while unloading
 779                  * anyway and to avoid scheduling a work with code that's
 780                  * being removed.
 781                  */
 782                 if (!try_module_get(THIS_MODULE)) {
 783                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 784                         return;
 785                 }
 786
 787                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 788                 if (!reprobe) {
 789                         module_put(THIS_MODULE);
 790                         return;
 791                 }
 792                 reprobe->dev = mvm->trans->dev;
 793                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 794                 schedule_work(&reprobe->work);
 795         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
 796                 /* don't let the transport/FW power down */
 797                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 798
 799                 if (mvm->restart_fw > 0)
 800                         mvm->restart_fw--;
 801                 ieee80211_restart_hw(mvm->hw);
 802         }
 803 }
 804
 805 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 806 {
 807         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 808
 809         iwl_mvm_dump_nic_error_log(mvm);
 810         if (!mvm->restart_fw)
 811                 iwl_mvm_dump_sram(mvm);
 812
 813         iwl_mvm_nic_restart(mvm);
 814 }
 815
 816 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 817 {
 818         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 819
 820         WARN_ON(1);
 821         iwl_mvm_nic_restart(mvm);
 822 }
 823
 824 struct iwl_d0i3_iter_data {
 825         struct iwl_mvm *mvm;
 826         u8 ap_sta_id;
 827         u8 vif_count;
 828 };
 829
 830 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 831                                         struct ieee80211_vif *vif)
 832 {
 833         struct iwl_d0i3_iter_data *data = _data;
 834         struct iwl_mvm *mvm = data->mvm;
 835         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 836         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 837
 838         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 839         if (vif->type != NL80211_IFTYPE_STATION ||
 840             !vif->bss_conf.assoc)
 841                 return;
 842
 843         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 844
 845         /*
 846          * on init/association, mvm already configures POWER_TABLE_CMD
 847          * and REPLY_MCAST_FILTER_CMD, so currently don't
 848          * reconfigure them (we might want to use different
 849          * params later on, though).
 850          */
 851         data->ap_sta_id = mvmvif->ap_sta_id;
 852         data->vif_count++;
 853 }
 854
 855 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
 856 {
 857         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 858         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 859         int ret;
 860         struct iwl_d0i3_iter_data d0i3_iter_data = {
 861                 .mvm = mvm,
 862         };
 863         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
 864                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
 865                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
 866                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
 867                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
 868         };
 869         struct iwl_d3_manager_config d3_cfg_cmd = {
 870                 .min_sleep_time = cpu_to_le32(1000),
 871         };
 872
 873         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
 874
 875         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 876                                                    IEEE80211_IFACE_ITER_NORMAL,
 877                                                    iwl_mvm_enter_d0i3_iterator,
 878                                                    &d0i3_iter_data);
 879         if (d0i3_iter_data.vif_count == 1) {
 880                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
 881         } else {
 882                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
 883                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 884         }
 885
 886         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
 887                                    sizeof(wowlan_config_cmd),
 888                                    &wowlan_config_cmd);
 889         if (ret)
 890                 return ret;
 891
 892         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
 893                                     flags | CMD_MAKE_TRANS_IDLE,
 894                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
 895 }
 896
 897 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
 898                                        struct ieee80211_vif *vif)
 899 {
 900         struct iwl_mvm *mvm = _data;
 901         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
 902
 903         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
 904         if (vif->type != NL80211_IFTYPE_STATION ||
 905             !vif->bss_conf.assoc)
 906                 return;
 907
 908         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
 909 }
 910
 911 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
 912                                          struct ieee80211_vif *vif)
 913 {
 914         struct iwl_mvm *mvm = data;
 915         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 916
 917         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
 918             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
 919                 ieee80211_connection_loss(vif);
 920 }
 921
 922 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
 923 {
 924         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
 925         struct iwl_host_cmd get_status_cmd = {
 926                 .id = WOWLAN_GET_STATUSES,
 927                 .flags = CMD_SYNC | CMD_HIGH_PRIO | CMD_WANT_SKB,
 928         };
 929         struct iwl_wowlan_status_v6 *status;
 930         int ret;
 931         u32 disconnection_reasons, wakeup_reasons;
 932
 933         mutex_lock(&mvm->mutex);
 934         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
 935         if (ret)
 936                 goto out;
 937
 938         if (!get_status_cmd.resp_pkt)
 939                 goto out;
 940
 941         status = (void *)get_status_cmd.resp_pkt->data;
 942         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
 943
 944         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
 945
 946         disconnection_reasons =
 947                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
 948                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
 949         if (wakeup_reasons & disconnection_reasons)
 950                 ieee80211_iterate_active_interfaces(
 951                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 952                         iwl_mvm_d0i3_disconnect_iter, mvm);
 953
 954         iwl_free_resp(&get_status_cmd);
 955 out:
 956         mutex_unlock(&mvm->mutex);
 957 }
 958
 959 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
 960 {
 961         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 962         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
 963                     CMD_WAKE_UP_TRANS;
 964         int ret;
 965
 966         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
 967
 968         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
 969         if (ret)
 970                 goto out;
 971
 972         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 973                                                    IEEE80211_IFACE_ITER_NORMAL,
 974                                                    iwl_mvm_exit_d0i3_iterator,
 975                                                    mvm);
 976 out:
 977         schedule_work(&mvm->d0i3_exit_work);
 978         return ret;
 979 }
 980
 981 static const struct iwl_op_mode_ops iwl_mvm_ops = {
 982         .start = iwl_op_mode_mvm_start,
 983         .stop = iwl_op_mode_mvm_stop,
 984         .rx = iwl_mvm_rx_dispatch,
 985         .queue_full = iwl_mvm_stop_sw_queue,
 986         .queue_not_full = iwl_mvm_wake_sw_queue,
 987         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
 988         .free_skb = iwl_mvm_free_skb,
 989         .nic_error = iwl_mvm_nic_error,
 990         .cmd_queue_full = iwl_mvm_cmd_queue_full,
 991         .nic_config = iwl_mvm_nic_config,
 992         .enter_d0i3 = iwl_mvm_enter_d0i3,
 993         .exit_d0i3 = iwl_mvm_exit_d0i3,
 994 };