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  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
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  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/module.h>
  66 #include <linux/vmalloc.h>
  67 #include <net/mac80211.h>
  68
  69 #include "iwl-notif-wait.h"
  70 #include "iwl-trans.h"
  71 #include "iwl-op-mode.h"
  72 #include "iwl-fw.h"
  73 #include "iwl-debug.h"
  74 #include "iwl-drv.h"
  75 #include "iwl-modparams.h"
  76 #include "mvm.h"
  77 #include "iwl-phy-db.h"
  78 #include "iwl-eeprom-parse.h"
  79 #include "iwl-csr.h"
  80 #include "iwl-io.h"
  81 #include "iwl-prph.h"
  82 #include "rs.h"
  83 #include "fw-api-scan.h"
  84 #include "time-event.h"
  85 #include "iwl-fw-error-dump.h"
  86
  87 /*
  88  * module name, copyright, version, etc.
  89  */
  90 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  91
  92 #define DRV_VERSION     IWLWIFI_VERSION
  93
  94 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  95 MODULE_VERSION(DRV_VERSION);
  96 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  97 MODULE_LICENSE("GPL");
  98
  99 static const struct iwl_op_mode_ops iwl_mvm_ops;
 100
 101 struct iwl_mvm_mod_params iwlmvm_mod_params = {
 102         .power_scheme = IWL_POWER_SCHEME_BPS,
 103         /* rest of fields are 0 by default */
 104 };
 105
 106 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 107 MODULE_PARM_DESC(init_dbg,
 108                  "set to true to debug an ASSERT in INIT fw (default: false");
 109 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 110 MODULE_PARM_DESC(power_scheme,
 111                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 112
 113 /*
 114  * module init and exit functions
 115  */
 116 static int __init iwl_mvm_init(void)
 117 {
 118         int ret;
 119
 120         ret = iwl_mvm_rate_control_register();
 121         if (ret) {
 122                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 123                 return ret;
 124         }
 125
 126         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 127
 128         if (ret) {
 129                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 130                 iwl_mvm_rate_control_unregister();
 131         }
 132
 133         return ret;
 134 }
 135 module_init(iwl_mvm_init);
 136
 137 static void __exit iwl_mvm_exit(void)
 138 {
 139         iwl_opmode_deregister("iwlmvm");
 140         iwl_mvm_rate_control_unregister();
 141 }
 142 module_exit(iwl_mvm_exit);
 143
 144 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 145 {
 146         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 147         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 148         u32 reg_val = 0;
 149
 150         radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 151                           FW_PHY_CFG_RADIO_TYPE_POS;
 152         radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
 153                           FW_PHY_CFG_RADIO_STEP_POS;
 154         radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
 155                           FW_PHY_CFG_RADIO_DASH_POS;
 156
 157         /* SKU control */
 158         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 160         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 161                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 162
 163         /* radio configuration */
 164         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 165         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 166         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 167
 168         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 169                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 170
 171         /*
 172          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 173          * shouldn't be set to any non-zero value. The same is supposed to be
 174          * true of the other HW, but unsetting them (such as the 7260) causes
 175          * automatic tests to fail on seemingly unrelated errors. Need to
 176          * further investigate this, but for now we'll separate cases.
 177          */
 178         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 179                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 180
 181         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 182                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 185                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 186                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 187                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 188                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 189                                 reg_val);
 190
 191         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 192                        radio_cfg_step, radio_cfg_dash);
 193
 194         /*
 195          * W/A : NIC is stuck in a reset state after Early PCIe power off
 196          * (PCIe power is lost before PERST# is asserted), causing ME FW
 197          * to lose ownership and not being able to obtain it back.
 198          */
 199         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 200                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 201                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 202                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 203 }
 204
 205 struct iwl_rx_handlers {
 206         u8 cmd_id;
 207         bool async;
 208         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 209                   struct iwl_device_cmd *cmd);
 210 };
 211
 212 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 213         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 214
 215 /*
 216  * Handlers for fw notifications
 217  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 218  * This list should be in order of frequency for performance purposes.
 219  *
 220  * The handler can be SYNC - this means that it will be called in the Rx path
 221  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 222  * only in this case!), it should be set as ASYNC. In that case, it will be
 223  * called from a worker with mvm->mutex held.
 224  */
 225 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 226         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 227         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 228         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 229         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 230
 231         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 232         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 233         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 234         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 235                    iwl_mvm_rx_ant_coupling_notif, true),
 236
 237         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 238
 239         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 240
 241         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 242         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 243         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 244                    iwl_mvm_rx_scan_offload_complete_notif, true),
 245         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
 246                    false),
 247         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 248                    true),
 249
 250         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 251         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 252
 253         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 254                    false),
 255
 256         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 257         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 258                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 259         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 260
 261         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 262                    true),
 263         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 264
 265 };
 266 #undef RX_HANDLER
 267 #define CMD(x) [x] = #x
 268
 269 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 270         CMD(MVM_ALIVE),
 271         CMD(REPLY_ERROR),
 272         CMD(INIT_COMPLETE_NOTIF),
 273         CMD(PHY_CONTEXT_CMD),
 274         CMD(MGMT_MCAST_KEY),
 275         CMD(TX_CMD),
 276         CMD(TXPATH_FLUSH),
 277         CMD(MAC_CONTEXT_CMD),
 278         CMD(TIME_EVENT_CMD),
 279         CMD(TIME_EVENT_NOTIFICATION),
 280         CMD(BINDING_CONTEXT_CMD),
 281         CMD(TIME_QUOTA_CMD),
 282         CMD(NON_QOS_TX_COUNTER_CMD),
 283         CMD(RADIO_VERSION_NOTIFICATION),
 284         CMD(SCAN_REQUEST_CMD),
 285         CMD(SCAN_ABORT_CMD),
 286         CMD(SCAN_START_NOTIFICATION),
 287         CMD(SCAN_RESULTS_NOTIFICATION),
 288         CMD(SCAN_COMPLETE_NOTIFICATION),
 289         CMD(NVM_ACCESS_CMD),
 290         CMD(PHY_CONFIGURATION_CMD),
 291         CMD(CALIB_RES_NOTIF_PHY_DB),
 292         CMD(SET_CALIB_DEFAULT_CMD),
 293         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 294         CMD(ADD_STA_KEY),
 295         CMD(ADD_STA),
 296         CMD(REMOVE_STA),
 297         CMD(LQ_CMD),
 298         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 299         CMD(MATCH_FOUND_NOTIFICATION),
 300         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 301         CMD(SCAN_OFFLOAD_ABORT_CMD),
 302         CMD(HOT_SPOT_CMD),
 303         CMD(SCAN_OFFLOAD_COMPLETE),
 304         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 305         CMD(SCAN_ITERATION_COMPLETE),
 306         CMD(POWER_TABLE_CMD),
 307         CMD(WEP_KEY),
 308         CMD(REPLY_RX_PHY_CMD),
 309         CMD(REPLY_RX_MPDU_CMD),
 310         CMD(BEACON_NOTIFICATION),
 311         CMD(BEACON_TEMPLATE_CMD),
 312         CMD(STATISTICS_NOTIFICATION),
 313         CMD(EOSP_NOTIFICATION),
 314         CMD(REDUCE_TX_POWER_CMD),
 315         CMD(TX_ANT_CONFIGURATION_CMD),
 316         CMD(D3_CONFIG_CMD),
 317         CMD(D0I3_END_CMD),
 318         CMD(PROT_OFFLOAD_CONFIG_CMD),
 319         CMD(OFFLOADS_QUERY_CMD),
 320         CMD(REMOTE_WAKE_CONFIG_CMD),
 321         CMD(WOWLAN_PATTERNS),
 322         CMD(WOWLAN_CONFIGURATION),
 323         CMD(WOWLAN_TSC_RSC_PARAM),
 324         CMD(WOWLAN_TKIP_PARAM),
 325         CMD(WOWLAN_KEK_KCK_MATERIAL),
 326         CMD(WOWLAN_GET_STATUSES),
 327         CMD(WOWLAN_TX_POWER_PER_DB),
 328         CMD(NET_DETECT_CONFIG_CMD),
 329         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 330         CMD(NET_DETECT_PROFILES_CMD),
 331         CMD(NET_DETECT_HOTSPOTS_CMD),
 332         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 333         CMD(CARD_STATE_NOTIFICATION),
 334         CMD(MISSED_BEACONS_NOTIFICATION),
 335         CMD(BT_COEX_PRIO_TABLE),
 336         CMD(BT_COEX_PROT_ENV),
 337         CMD(BT_PROFILE_NOTIFICATION),
 338         CMD(BT_CONFIG),
 339         CMD(MCAST_FILTER_CMD),
 340         CMD(BCAST_FILTER_CMD),
 341         CMD(REPLY_SF_CFG_CMD),
 342         CMD(REPLY_BEACON_FILTERING_CMD),
 343         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 344         CMD(DTS_MEASUREMENT_NOTIFICATION),
 345         CMD(REPLY_THERMAL_MNG_BACKOFF),
 346         CMD(MAC_PM_POWER_TABLE),
 347         CMD(LTR_CONFIG),
 348         CMD(BT_COEX_CI),
 349         CMD(BT_COEX_UPDATE_SW_BOOST),
 350         CMD(BT_COEX_UPDATE_CORUN_LUT),
 351         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 352         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 353         CMD(ANTENNA_COUPLING_NOTIFICATION),
 354         CMD(SCD_QUEUE_CFG),
 355         CMD(SCAN_CFG_CMD),
 356         CMD(SCAN_REQ_UMAC),
 357         CMD(SCAN_ABORT_UMAC),
 358         CMD(SCAN_COMPLETE_UMAC),
 359         CMD(TDLS_CHANNEL_SWITCH_CMD),
 360         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 361         CMD(TDLS_CONFIG_CMD),
 362 };
 363 #undef CMD
 364
 365 /* this forward declaration can avoid to export the function */
 366 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 367 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 368
 369 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 370 {
 371         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 372
 373         if (!pwr_tx_backoff)
 374                 return 0;
 375
 376         while (pwr_tx_backoff->pwr) {
 377                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 378                         return pwr_tx_backoff->backoff;
 379
 380                 pwr_tx_backoff++;
 381         }
 382
 383         return 0;
 384 }
 385
 386 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 387
 388 static struct iwl_op_mode *
 389 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 390                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 391 {
 392         struct ieee80211_hw *hw;
 393         struct iwl_op_mode *op_mode;
 394         struct iwl_mvm *mvm;
 395         struct iwl_trans_config trans_cfg = {};
 396         static const u8 no_reclaim_cmds[] = {
 397                 TX_CMD,
 398         };
 399         int err, scan_size;
 400         u32 min_backoff;
 401
 402         /*
 403          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 404          * index all over the driver - check that its value corresponds to the
 405          * array size.
 406          */
 407         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 408
 409         /********************************
 410          * 1. Allocating and configuring HW data
 411          ********************************/
 412         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 413                                 sizeof(struct iwl_mvm),
 414                                 &iwl_mvm_hw_ops);
 415         if (!hw)
 416                 return NULL;
 417
 418         if (cfg->max_rx_agg_size)
 419                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 420
 421         if (cfg->max_tx_agg_size)
 422                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 423
 424         op_mode = hw->priv;
 425         op_mode->ops = &iwl_mvm_ops;
 426
 427         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 428         mvm->dev = trans->dev;
 429         mvm->trans = trans;
 430         mvm->cfg = cfg;
 431         mvm->fw = fw;
 432         mvm->hw = hw;
 433
 434         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 435
 436         mvm->aux_queue = 15;
 437         mvm->first_agg_queue = 16;
 438         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 439         if (mvm->cfg->base_params->num_of_queues == 16) {
 440                 mvm->aux_queue = 11;
 441                 mvm->first_agg_queue = 12;
 442         }
 443         mvm->sf_state = SF_UNINIT;
 444         mvm->low_latency_agg_frame_limit = 6;
 445         mvm->cur_ucode = IWL_UCODE_INIT;
 446
 447         mutex_init(&mvm->mutex);
 448         mutex_init(&mvm->d0i3_suspend_mutex);
 449         spin_lock_init(&mvm->async_handlers_lock);
 450         INIT_LIST_HEAD(&mvm->time_event_list);
 451         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 452         INIT_LIST_HEAD(&mvm->async_handlers_list);
 453         spin_lock_init(&mvm->time_event_lock);
 454
 455         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 456         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 457         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 458         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 459         INIT_WORK(&mvm->fw_error_dump_wk, iwl_mvm_fw_error_dump_wk);
 460         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
 461
 462         spin_lock_init(&mvm->d0i3_tx_lock);
 463         spin_lock_init(&mvm->refs_lock);
 464         skb_queue_head_init(&mvm->d0i3_tx);
 465         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 466
 467         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 468
 469         /*
 470          * Populate the state variables that the transport layer needs
 471          * to know about.
 472          */
 473         trans_cfg.op_mode = op_mode;
 474         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 475         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 476         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 477
 478         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 479                 trans_cfg.bc_table_dword = true;
 480
 481         if (!iwlwifi_mod_params.wd_disable)
 482                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 483         else
 484                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 485
 486         trans_cfg.command_names = iwl_mvm_cmd_strings;
 487
 488         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 489         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 490         trans_cfg.scd_set_active = true;
 491
 492         snprintf(mvm->hw->wiphy->fw_version,
 493                  sizeof(mvm->hw->wiphy->fw_version),
 494                  "%s", fw->fw_version);
 495
 496         /* Configure transport layer */
 497         iwl_trans_configure(mvm->trans, &trans_cfg);
 498
 499         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 500         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 501
 502         /* set up notification wait support */
 503         iwl_notification_wait_init(&mvm->notif_wait);
 504
 505         /* Init phy db */
 506         mvm->phy_db = iwl_phy_db_init(trans);
 507         if (!mvm->phy_db) {
 508                 IWL_ERR(mvm, "Cannot init phy_db\n");
 509                 goto out_free;
 510         }
 511
 512         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 513                  mvm->cfg->name, mvm->trans->hw_rev);
 514
 515         min_backoff = calc_min_backoff(trans, cfg);
 516         iwl_mvm_tt_initialize(mvm, min_backoff);
 517         /* set the nvm_file_name according to priority */
 518         if (iwlwifi_mod_params.nvm_file)
 519                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 520         else
 521                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 522
 523         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 524                  "not allowing power-up and not having nvm_file\n"))
 525                 goto out_free;
 526
 527         /*
 528          * Even if nvm exists in the nvm_file driver should read again the nvm
 529          * from the nic because there might be entries that exist in the OTP
 530          * and not in the file.
 531          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 532          */
 533         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 534                 err = iwl_nvm_init(mvm, false);
 535                 if (err)
 536                         goto out_free;
 537         } else {
 538                 err = iwl_trans_start_hw(mvm->trans);
 539                 if (err)
 540                         goto out_free;
 541
 542                 mutex_lock(&mvm->mutex);
 543                 err = iwl_run_init_mvm_ucode(mvm, true);
 544                 if (!err || !iwlmvm_mod_params.init_dbg)
 545                         iwl_trans_stop_device(trans);
 546                 mutex_unlock(&mvm->mutex);
 547                 /* returns 0 if successful, 1 if success but in rfkill */
 548                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 549                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 550                         goto out_free;
 551                 }
 552         }
 553
 554         scan_size = iwl_mvm_scan_size(mvm);
 555
 556         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 557         if (!mvm->scan_cmd)
 558                 goto out_free;
 559
 560         err = iwl_mvm_mac_setup_register(mvm);
 561         if (err)
 562                 goto out_free;
 563
 564         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 565         if (err)
 566                 goto out_unregister;
 567
 568         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 569
 570         /* rpm starts with a taken ref. only set the appropriate bit here. */
 571         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 572
 573         return op_mode;
 574
 575  out_unregister:
 576         ieee80211_unregister_hw(mvm->hw);
 577         iwl_mvm_leds_exit(mvm);
 578  out_free:
 579         iwl_phy_db_free(mvm->phy_db);
 580         kfree(mvm->scan_cmd);
 581         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 582                 iwl_trans_op_mode_leave(trans);
 583         ieee80211_free_hw(mvm->hw);
 584         return NULL;
 585 }
 586
 587 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 588 {
 589         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 590         int i;
 591
 592         iwl_mvm_leds_exit(mvm);
 593
 594         iwl_mvm_tt_exit(mvm);
 595
 596         ieee80211_unregister_hw(mvm->hw);
 597
 598         kfree(mvm->scan_cmd);
 599         kfree(mvm->mcast_filter_cmd);
 600         mvm->mcast_filter_cmd = NULL;
 601
 602 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 603         kfree(mvm->d3_resume_sram);
 604         if (mvm->nd_config) {
 605                 kfree(mvm->nd_config->match_sets);
 606                 kfree(mvm->nd_config);
 607                 mvm->nd_config = NULL;
 608         }
 609 #endif
 610
 611         iwl_trans_op_mode_leave(mvm->trans);
 612
 613         iwl_phy_db_free(mvm->phy_db);
 614         mvm->phy_db = NULL;
 615
 616         iwl_free_nvm_data(mvm->nvm_data);
 617         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 618                 kfree(mvm->nvm_sections[i].data);
 619
 620         ieee80211_free_hw(mvm->hw);
 621 }
 622
 623 struct iwl_async_handler_entry {
 624         struct list_head list;
 625         struct iwl_rx_cmd_buffer rxb;
 626         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 627                   struct iwl_device_cmd *cmd);
 628 };
 629
 630 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 631 {
 632         struct iwl_async_handler_entry *entry, *tmp;
 633
 634         spin_lock_bh(&mvm->async_handlers_lock);
 635         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 636                 iwl_free_rxb(&entry->rxb);
 637                 list_del(&entry->list);
 638                 kfree(entry);
 639         }
 640         spin_unlock_bh(&mvm->async_handlers_lock);
 641 }
 642
 643 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 644 {
 645         struct iwl_mvm *mvm =
 646                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 647         struct iwl_async_handler_entry *entry, *tmp;
 648         struct list_head local_list;
 649
 650         INIT_LIST_HEAD(&local_list);
 651
 652         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 653         mutex_lock(&mvm->mutex);
 654
 655         /*
 656          * Sync with Rx path with a lock. Remove all the entries from this list,
 657          * add them to a local one (lock free), and then handle them.
 658          */
 659         spin_lock_bh(&mvm->async_handlers_lock);
 660         list_splice_init(&mvm->async_handlers_list, &local_list);
 661         spin_unlock_bh(&mvm->async_handlers_lock);
 662
 663         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 664                 if (entry->fn(mvm, &entry->rxb, NULL))
 665                         IWL_WARN(mvm,
 666                                  "returned value from ASYNC handlers are ignored\n");
 667                 iwl_free_rxb(&entry->rxb);
 668                 list_del(&entry->list);
 669                 kfree(entry);
 670         }
 671         mutex_unlock(&mvm->mutex);
 672 }
 673
 674 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 675                                struct iwl_rx_cmd_buffer *rxb,
 676                                struct iwl_device_cmd *cmd)
 677 {
 678         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 679         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 680         u8 i;
 681
 682         /*
 683          * Do the notification wait before RX handlers so
 684          * even if the RX handler consumes the RXB we have
 685          * access to it in the notification wait entry.
 686          */
 687         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 688
 689         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 690                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 691                 struct iwl_async_handler_entry *entry;
 692
 693                 if (rx_h->cmd_id != pkt->hdr.cmd)
 694                         continue;
 695
 696                 if (!rx_h->async)
 697                         return rx_h->fn(mvm, rxb, cmd);
 698
 699                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 700                 /* we can't do much... */
 701                 if (!entry)
 702                         return 0;
 703
 704                 entry->rxb._page = rxb_steal_page(rxb);
 705                 entry->rxb._offset = rxb->_offset;
 706                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 707                 entry->fn = rx_h->fn;
 708                 spin_lock(&mvm->async_handlers_lock);
 709                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 710                 spin_unlock(&mvm->async_handlers_lock);
 711                 schedule_work(&mvm->async_handlers_wk);
 712                 break;
 713         }
 714
 715         return 0;
 716 }
 717
 718 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 719 {
 720         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 721         int mq = mvm->queue_to_mac80211[queue];
 722
 723         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 724                 return;
 725
 726         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 727                 IWL_DEBUG_TX_QUEUES(mvm,
 728                                     "queue %d (mac80211 %d) already stopped\n",
 729                                     queue, mq);
 730                 return;
 731         }
 732
 733         ieee80211_stop_queue(mvm->hw, mq);
 734 }
 735
 736 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 737 {
 738         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 739         int mq = mvm->queue_to_mac80211[queue];
 740
 741         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 742                 return;
 743
 744         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 745                 IWL_DEBUG_TX_QUEUES(mvm,
 746                                     "queue %d (mac80211 %d) still stopped\n",
 747                                     queue, mq);
 748                 return;
 749         }
 750
 751         ieee80211_wake_queue(mvm->hw, mq);
 752 }
 753
 754 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 755 {
 756         if (state)
 757                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 758         else
 759                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 760
 761         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 762 }
 763
 764 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 765 {
 766         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 767         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 768
 769         if (state)
 770                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 771         else
 772                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 773
 774         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 775
 776         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 777         if (calibrating)
 778                 iwl_abort_notification_waits(&mvm->notif_wait);
 779
 780         /*
 781          * Stop the device if we run OPERATIONAL firmware or if we are in the
 782          * middle of the calibrations.
 783          */
 784         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 785 }
 786
 787 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 788 {
 789         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 790         struct ieee80211_tx_info *info;
 791
 792         info = IEEE80211_SKB_CB(skb);
 793         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 794         ieee80211_free_txskb(mvm->hw, skb);
 795 }
 796
 797 struct iwl_mvm_reprobe {
 798         struct device *dev;
 799         struct work_struct work;
 800 };
 801
 802 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 803 {
 804         struct iwl_mvm_reprobe *reprobe;
 805
 806         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 807         if (device_reprobe(reprobe->dev))
 808                 dev_err(reprobe->dev, "reprobe failed!\n");
 809         kfree(reprobe);
 810         module_put(THIS_MODULE);
 811 }
 812
 813 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 814 {
 815         struct iwl_mvm *mvm =
 816                 container_of(work, struct iwl_mvm, fw_error_dump_wk);
 817
 818         mutex_lock(&mvm->mutex);
 819         iwl_mvm_fw_error_dump(mvm);
 820         mutex_unlock(&mvm->mutex);
 821 }
 822
 823 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 824 {
 825         iwl_abort_notification_waits(&mvm->notif_wait);
 826
 827         /*
 828          * This is a bit racy, but worst case we tell mac80211 about
 829          * a stopped/aborted scan when that was already done which
 830          * is not a problem. It is necessary to abort any os scan
 831          * here because mac80211 requires having the scan cleared
 832          * before restarting.
 833          * We'll reset the scan_status to NONE in restart cleanup in
 834          * the next start() call from mac80211. If restart isn't called
 835          * (no fw restart) scan status will stay busy.
 836          */
 837         switch (mvm->scan_status) {
 838         case IWL_MVM_SCAN_NONE:
 839                 break;
 840         case IWL_MVM_SCAN_OS:
 841                 ieee80211_scan_completed(mvm->hw, true);
 842                 break;
 843         case IWL_MVM_SCAN_SCHED:
 844                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 845                 if (!mvm->restart_fw)
 846                         ieee80211_sched_scan_stopped(mvm->hw);
 847                 break;
 848         }
 849
 850         /*
 851          * If we're restarting already, don't cycle restarts.
 852          * If INIT fw asserted, it will likely fail again.
 853          * If WoWLAN fw asserted, don't restart either, mac80211
 854          * can't recover this since we're already half suspended.
 855          */
 856         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 857                 struct iwl_mvm_reprobe *reprobe;
 858
 859                 IWL_ERR(mvm,
 860                         "Firmware error during reconfiguration - reprobe!\n");
 861
 862                 /*
 863                  * get a module reference to avoid doing this while unloading
 864                  * anyway and to avoid scheduling a work with code that's
 865                  * being removed.
 866                  */
 867                 if (!try_module_get(THIS_MODULE)) {
 868                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 869                         return;
 870                 }
 871
 872                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 873                 if (!reprobe) {
 874                         module_put(THIS_MODULE);
 875                         return;
 876                 }
 877                 reprobe->dev = mvm->trans->dev;
 878                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 879                 schedule_work(&reprobe->work);
 880         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
 881                    (!fw_error || mvm->restart_fw)) {
 882                 /* don't let the transport/FW power down */
 883                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 884
 885                 if (fw_error && mvm->restart_fw > 0)
 886                         mvm->restart_fw--;
 887                 ieee80211_restart_hw(mvm->hw);
 888         } else if (fw_error) {
 889                 schedule_work(&mvm->fw_error_dump_wk);
 890         }
 891 }
 892
 893 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 894 {
 895         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 896
 897         iwl_mvm_dump_nic_error_log(mvm);
 898
 899         iwl_mvm_nic_restart(mvm, true);
 900 }
 901
 902 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 903 {
 904         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 905
 906         WARN_ON(1);
 907         iwl_mvm_nic_restart(mvm, true);
 908 }
 909
 910 struct iwl_d0i3_iter_data {
 911         struct iwl_mvm *mvm;
 912         u8 ap_sta_id;
 913         u8 vif_count;
 914         u8 offloading_tid;
 915         bool disable_offloading;
 916 };
 917
 918 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 919                                         struct ieee80211_vif *vif,
 920                                         struct iwl_d0i3_iter_data *iter_data)
 921 {
 922         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 923         struct ieee80211_sta *ap_sta;
 924         struct iwl_mvm_sta *mvmsta;
 925         u32 available_tids = 0;
 926         u8 tid;
 927
 928         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 929                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 930                 return false;
 931
 932         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 933         if (IS_ERR_OR_NULL(ap_sta))
 934                 return false;
 935
 936         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 937         spin_lock_bh(&mvmsta->lock);
 938         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 939                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 940
 941                 /*
 942                  * in case of pending tx packets, don't use this tid
 943                  * for offloading in order to prevent reuse of the same
 944                  * qos seq counters.
 945                  */
 946                 if (iwl_mvm_tid_queued(tid_data))
 947                         continue;
 948
 949                 if (tid_data->state != IWL_AGG_OFF)
 950                         continue;
 951
 952                 available_tids |= BIT(tid);
 953         }
 954         spin_unlock_bh(&mvmsta->lock);
 955
 956         /*
 957          * disallow protocol offloading if we have no available tid
 958          * (with no pending frames and no active aggregation,
 959          * as we don't handle "holes" properly - the scheduler needs the
 960          * frame's seq number and TFD index to match)
 961          */
 962         if (!available_tids)
 963                 return true;
 964
 965         /* for simplicity, just use the first available tid */
 966         iter_data->offloading_tid = ffs(available_tids) - 1;
 967         return false;
 968 }
 969
 970 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 971                                         struct ieee80211_vif *vif)
 972 {
 973         struct iwl_d0i3_iter_data *data = _data;
 974         struct iwl_mvm *mvm = data->mvm;
 975         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 976         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 977
 978         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 979         if (vif->type != NL80211_IFTYPE_STATION ||
 980             !vif->bss_conf.assoc)
 981                 return;
 982
 983         /*
 984          * in case of pending tx packets or active aggregations,
 985          * avoid offloading features in order to prevent reuse of
 986          * the same qos seq counters.
 987          */
 988         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 989                 data->disable_offloading = true;
 990
 991         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 992         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 993
 994         /*
 995          * on init/association, mvm already configures POWER_TABLE_CMD
 996          * and REPLY_MCAST_FILTER_CMD, so currently don't
 997          * reconfigure them (we might want to use different
 998          * params later on, though).
 999          */
1000         data->ap_sta_id = mvmvif->ap_sta_id;
1001         data->vif_count++;
1002 }
1003
1004 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1005                                     struct iwl_wowlan_config_cmd_v3 *cmd,
1006                                     struct iwl_d0i3_iter_data *iter_data)
1007 {
1008         struct ieee80211_sta *ap_sta;
1009         struct iwl_mvm_sta *mvm_ap_sta;
1010
1011         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1012                 return;
1013
1014         rcu_read_lock();
1015
1016         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1017         if (IS_ERR_OR_NULL(ap_sta))
1018                 goto out;
1019
1020         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1021         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
1022         cmd->offloading_tid = iter_data->offloading_tid;
1023
1024         /*
1025          * The d0i3 uCode takes care of the nonqos counters,
1026          * so configure only the qos seq ones.
1027          */
1028         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
1029 out:
1030         rcu_read_unlock();
1031 }
1032 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1033 {
1034         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1035         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1036         int ret;
1037         struct iwl_d0i3_iter_data d0i3_iter_data = {
1038                 .mvm = mvm,
1039         };
1040         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1041                 .common = {
1042                         .wakeup_filter =
1043                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1044                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
1045                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1046                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1047                 },
1048         };
1049         struct iwl_d3_manager_config d3_cfg_cmd = {
1050                 .min_sleep_time = cpu_to_le32(1000),
1051         };
1052
1053         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1054
1055         /* make sure we have no running tx while configuring the qos */
1056         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1057         synchronize_net();
1058
1059         /*
1060          * iwl_mvm_ref_sync takes a reference before checking the flag.
1061          * so by checking there is no held reference we prevent a state
1062          * in which iwl_mvm_ref_sync continues successfully while we
1063          * configure the firmware to enter d0i3
1064          */
1065         if (iwl_mvm_ref_taken(mvm)) {
1066                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1067                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1068                 wake_up(&mvm->d0i3_exit_waitq);
1069                 return 1;
1070         }
1071
1072         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1073                                                    IEEE80211_IFACE_ITER_NORMAL,
1074                                                    iwl_mvm_enter_d0i3_iterator,
1075                                                    &d0i3_iter_data);
1076         if (d0i3_iter_data.vif_count == 1) {
1077                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1078                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1079         } else {
1080                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1081                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1082                 mvm->d0i3_offloading = false;
1083         }
1084
1085         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1086         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1087                                    sizeof(wowlan_config_cmd),
1088                                    &wowlan_config_cmd);
1089         if (ret)
1090                 return ret;
1091
1092         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1093                                     flags | CMD_MAKE_TRANS_IDLE,
1094                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1095 }
1096
1097 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1098                                        struct ieee80211_vif *vif)
1099 {
1100         struct iwl_mvm *mvm = _data;
1101         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1102
1103         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1104         if (vif->type != NL80211_IFTYPE_STATION ||
1105             !vif->bss_conf.assoc)
1106                 return;
1107
1108         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1109 }
1110
1111 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1112                                          struct ieee80211_vif *vif)
1113 {
1114         struct iwl_mvm *mvm = data;
1115         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1116
1117         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1118             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1119                 ieee80211_connection_loss(vif);
1120 }
1121
1122 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1123 {
1124         struct ieee80211_sta *sta = NULL;
1125         struct iwl_mvm_sta *mvm_ap_sta;
1126         int i;
1127         bool wake_queues = false;
1128
1129         lockdep_assert_held(&mvm->mutex);
1130
1131         spin_lock_bh(&mvm->d0i3_tx_lock);
1132
1133         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1134                 goto out;
1135
1136         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1137
1138         /* get the sta in order to update seq numbers and re-enqueue skbs */
1139         sta = rcu_dereference_protected(
1140                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1141                         lockdep_is_held(&mvm->mutex));
1142
1143         if (IS_ERR_OR_NULL(sta)) {
1144                 sta = NULL;
1145                 goto out;
1146         }
1147
1148         if (mvm->d0i3_offloading && qos_seq) {
1149                 /* update qos seq numbers if offloading was enabled */
1150                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1151                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1152                         u16 seq = le16_to_cpu(qos_seq[i]);
1153                         /* firmware stores last-used one, we store next one */
1154                         seq += 0x10;
1155                         mvm_ap_sta->tid_data[i].seq_number = seq;
1156                 }
1157         }
1158 out:
1159         /* re-enqueue (or drop) all packets */
1160         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1161                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1162
1163                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1164                         ieee80211_free_txskb(mvm->hw, skb);
1165
1166                 /* if the skb_queue is not empty, we need to wake queues */
1167                 wake_queues = true;
1168         }
1169         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1170         wake_up(&mvm->d0i3_exit_waitq);
1171         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1172         if (wake_queues)
1173                 ieee80211_wake_queues(mvm->hw);
1174
1175         spin_unlock_bh(&mvm->d0i3_tx_lock);
1176 }
1177
1178 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1179 {
1180         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1181         struct iwl_host_cmd get_status_cmd = {
1182                 .id = WOWLAN_GET_STATUSES,
1183                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1184         };
1185         struct iwl_wowlan_status *status;
1186         int ret;
1187         u32 disconnection_reasons, wakeup_reasons;
1188         __le16 *qos_seq = NULL;
1189
1190         mutex_lock(&mvm->mutex);
1191         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1192         if (ret)
1193                 goto out;
1194
1195         if (!get_status_cmd.resp_pkt)
1196                 goto out;
1197
1198         status = (void *)get_status_cmd.resp_pkt->data;
1199         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1200         qos_seq = status->qos_seq_ctr;
1201
1202         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1203
1204         disconnection_reasons =
1205                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1206                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1207         if (wakeup_reasons & disconnection_reasons)
1208                 ieee80211_iterate_active_interfaces(
1209                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1210                         iwl_mvm_d0i3_disconnect_iter, mvm);
1211
1212         iwl_free_resp(&get_status_cmd);
1213 out:
1214         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1215         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1216         mutex_unlock(&mvm->mutex);
1217 }
1218
1219 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1220 {
1221         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1222                     CMD_WAKE_UP_TRANS;
1223         int ret;
1224
1225         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1226
1227         mutex_lock(&mvm->d0i3_suspend_mutex);
1228         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1229                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1230                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1231                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1232                 return 0;
1233         }
1234         mutex_unlock(&mvm->d0i3_suspend_mutex);
1235
1236         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1237         if (ret)
1238                 goto out;
1239
1240         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1241                                                    IEEE80211_IFACE_ITER_NORMAL,
1242                                                    iwl_mvm_exit_d0i3_iterator,
1243                                                    mvm);
1244 out:
1245         schedule_work(&mvm->d0i3_exit_work);
1246         return ret;
1247 }
1248
1249 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1250 {
1251         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1252
1253         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1254         return _iwl_mvm_exit_d0i3(mvm);
1255 }
1256
1257 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1258                              struct napi_struct *napi,
1259                              struct net_device *napi_dev,
1260                              int (*poll)(struct napi_struct *, int),
1261                              int weight)
1262 {
1263         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1264
1265         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1266 }
1267
1268 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1269         .start = iwl_op_mode_mvm_start,
1270         .stop = iwl_op_mode_mvm_stop,
1271         .rx = iwl_mvm_rx_dispatch,
1272         .queue_full = iwl_mvm_stop_sw_queue,
1273         .queue_not_full = iwl_mvm_wake_sw_queue,
1274         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1275         .free_skb = iwl_mvm_free_skb,
1276         .nic_error = iwl_mvm_nic_error,
1277         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1278         .nic_config = iwl_mvm_nic_config,
1279         .enter_d0i3 = iwl_mvm_enter_d0i3,
1280         .exit_d0i3 = iwl_mvm_exit_d0i3,
1281         .napi_add = iwl_mvm_napi_add,
1282 };