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  *
  20  * You should have received a copy of the GNU General Public License
  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 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  88 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  89 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  90 MODULE_LICENSE("GPL");
  91
  92 static const struct iwl_op_mode_ops iwl_mvm_ops;
  93
  94 struct iwl_mvm_mod_params iwlmvm_mod_params = {
  95         .power_scheme = IWL_POWER_SCHEME_BPS,
  96         .tfd_q_hang_detect = true
  97         /* rest of fields are 0 by default */
  98 };
  99
 100 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 101 MODULE_PARM_DESC(init_dbg,
 102                  "set to true to debug an ASSERT in INIT fw (default: false");
 103 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 104 MODULE_PARM_DESC(power_scheme,
 105                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 106 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
 107                    bool, S_IRUGO);
 108 MODULE_PARM_DESC(tfd_q_hang_detect,
 109                  "TFD queues hang detection (default: true");
 110
 111 /*
 112  * module init and exit functions
 113  */
 114 static int __init iwl_mvm_init(void)
 115 {
 116         int ret;
 117
 118         ret = iwl_mvm_rate_control_register();
 119         if (ret) {
 120                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 121                 return ret;
 122         }
 123
 124         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 125
 126         if (ret) {
 127                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 128                 iwl_mvm_rate_control_unregister();
 129         }
 130
 131         return ret;
 132 }
 133 module_init(iwl_mvm_init);
 134
 135 static void __exit iwl_mvm_exit(void)
 136 {
 137         iwl_opmode_deregister("iwlmvm");
 138         iwl_mvm_rate_control_unregister();
 139 }
 140 module_exit(iwl_mvm_exit);
 141
 142 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 143 {
 144         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 145         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 146         u32 reg_val = 0;
 147         u32 phy_config = iwl_mvm_get_phy_config(mvm);
 148
 149         radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 150                          FW_PHY_CFG_RADIO_TYPE_POS;
 151         radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
 152                          FW_PHY_CFG_RADIO_STEP_POS;
 153         radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
 154                          FW_PHY_CFG_RADIO_DASH_POS;
 155
 156         /* SKU control */
 157         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 158                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 159         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 160                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 161
 162         /* radio configuration */
 163         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 164         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 165         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 166
 167         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 168                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 169
 170         /*
 171          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 172          * shouldn't be set to any non-zero value. The same is supposed to be
 173          * true of the other HW, but unsetting them (such as the 7260) causes
 174          * automatic tests to fail on seemingly unrelated errors. Need to
 175          * further investigate this, but for now we'll separate cases.
 176          */
 177         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 178                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 179
 180         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 181                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 182                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 185                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 186                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 187                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 188                                 reg_val);
 189
 190         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 191                        radio_cfg_step, radio_cfg_dash);
 192
 193         /*
 194          * W/A : NIC is stuck in a reset state after Early PCIe power off
 195          * (PCIe power is lost before PERST# is asserted), causing ME FW
 196          * to lose ownership and not being able to obtain it back.
 197          */
 198         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 199                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 200                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 201                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 202 }
 203
 204 struct iwl_rx_handlers {
 205         u8 cmd_id;
 206         bool async;
 207         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 208                   struct iwl_device_cmd *cmd);
 209 };
 210
 211 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 212         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 213
 214 /*
 215  * Handlers for fw notifications
 216  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 217  * This list should be in order of frequency for performance purposes.
 218  *
 219  * The handler can be SYNC - this means that it will be called in the Rx path
 220  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 221  * only in this case!), it should be set as ASYNC. In that case, it will be
 222  * called from a worker with mvm->mutex held.
 223  */
 224 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 225         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 226         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 227         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 228         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 229
 230         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 231         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 232         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 233         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 234                    iwl_mvm_rx_ant_coupling_notif, true),
 235
 236         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 237
 238         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 239
 240         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 241         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 242         RX_HANDLER(SCAN_ITERATION_COMPLETE,
 243                    iwl_mvm_rx_scan_offload_iter_complete_notif, false),
 244         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 245                    iwl_mvm_rx_scan_offload_complete_notif, true),
 246         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
 247                    false),
 248         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 249                    true),
 250
 251         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 252         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 253
 254         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 255                    false),
 256
 257         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 258         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 259                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 260         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 261
 262         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 263                    true),
 264         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 265
 266 };
 267 #undef RX_HANDLER
 268 #define CMD(x) [x] = #x
 269
 270 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 271         CMD(MVM_ALIVE),
 272         CMD(REPLY_ERROR),
 273         CMD(INIT_COMPLETE_NOTIF),
 274         CMD(PHY_CONTEXT_CMD),
 275         CMD(MGMT_MCAST_KEY),
 276         CMD(TX_CMD),
 277         CMD(TXPATH_FLUSH),
 278         CMD(SHARED_MEM_CFG),
 279         CMD(MAC_CONTEXT_CMD),
 280         CMD(TIME_EVENT_CMD),
 281         CMD(TIME_EVENT_NOTIFICATION),
 282         CMD(BINDING_CONTEXT_CMD),
 283         CMD(TIME_QUOTA_CMD),
 284         CMD(NON_QOS_TX_COUNTER_CMD),
 285         CMD(RADIO_VERSION_NOTIFICATION),
 286         CMD(SCAN_REQUEST_CMD),
 287         CMD(SCAN_ABORT_CMD),
 288         CMD(SCAN_START_NOTIFICATION),
 289         CMD(SCAN_RESULTS_NOTIFICATION),
 290         CMD(SCAN_COMPLETE_NOTIFICATION),
 291         CMD(NVM_ACCESS_CMD),
 292         CMD(PHY_CONFIGURATION_CMD),
 293         CMD(CALIB_RES_NOTIF_PHY_DB),
 294         CMD(SET_CALIB_DEFAULT_CMD),
 295         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 296         CMD(ADD_STA_KEY),
 297         CMD(ADD_STA),
 298         CMD(REMOVE_STA),
 299         CMD(LQ_CMD),
 300         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 301         CMD(MATCH_FOUND_NOTIFICATION),
 302         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 303         CMD(SCAN_OFFLOAD_ABORT_CMD),
 304         CMD(HOT_SPOT_CMD),
 305         CMD(SCAN_OFFLOAD_COMPLETE),
 306         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 307         CMD(SCAN_ITERATION_COMPLETE),
 308         CMD(POWER_TABLE_CMD),
 309         CMD(WEP_KEY),
 310         CMD(REPLY_RX_PHY_CMD),
 311         CMD(REPLY_RX_MPDU_CMD),
 312         CMD(BEACON_NOTIFICATION),
 313         CMD(BEACON_TEMPLATE_CMD),
 314         CMD(STATISTICS_NOTIFICATION),
 315         CMD(EOSP_NOTIFICATION),
 316         CMD(REDUCE_TX_POWER_CMD),
 317         CMD(TX_ANT_CONFIGURATION_CMD),
 318         CMD(D3_CONFIG_CMD),
 319         CMD(D0I3_END_CMD),
 320         CMD(PROT_OFFLOAD_CONFIG_CMD),
 321         CMD(OFFLOADS_QUERY_CMD),
 322         CMD(REMOTE_WAKE_CONFIG_CMD),
 323         CMD(WOWLAN_PATTERNS),
 324         CMD(WOWLAN_CONFIGURATION),
 325         CMD(WOWLAN_TSC_RSC_PARAM),
 326         CMD(WOWLAN_TKIP_PARAM),
 327         CMD(WOWLAN_KEK_KCK_MATERIAL),
 328         CMD(WOWLAN_GET_STATUSES),
 329         CMD(WOWLAN_TX_POWER_PER_DB),
 330         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 331         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 332         CMD(SCAN_OFFLOAD_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         trans_cfg.command_names = iwl_mvm_cmd_strings;
 482
 483         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 484         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 485         trans_cfg.scd_set_active = true;
 486
 487         trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
 488
 489         /* Set a short watchdog for the command queue */
 490         trans_cfg.cmd_q_wdg_timeout =
 491                 iwlmvm_mod_params.tfd_q_hang_detect ? IWL_DEF_WD_TIMEOUT :
 492                                                       IWL_WATCHDOG_DISABLED;
 493
 494         snprintf(mvm->hw->wiphy->fw_version,
 495                  sizeof(mvm->hw->wiphy->fw_version),
 496                  "%s", fw->fw_version);
 497
 498         /* Configure transport layer */
 499         iwl_trans_configure(mvm->trans, &trans_cfg);
 500
 501         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 502         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 503         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 504         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 505         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 506                sizeof(trans->dbg_conf_tlv));
 507
 508         /* set up notification wait support */
 509         iwl_notification_wait_init(&mvm->notif_wait);
 510
 511         /* Init phy db */
 512         mvm->phy_db = iwl_phy_db_init(trans);
 513         if (!mvm->phy_db) {
 514                 IWL_ERR(mvm, "Cannot init phy_db\n");
 515                 goto out_free;
 516         }
 517
 518         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 519                  mvm->cfg->name, mvm->trans->hw_rev);
 520
 521         min_backoff = calc_min_backoff(trans, cfg);
 522         iwl_mvm_tt_initialize(mvm, min_backoff);
 523         /* set the nvm_file_name according to priority */
 524         if (iwlwifi_mod_params.nvm_file) {
 525                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 526         } else {
 527                 if ((trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) &&
 528                     (CSR_HW_REV_STEP(trans->hw_rev) == SILICON_A_STEP))
 529                         mvm->nvm_file_name = mvm->cfg->default_nvm_file_8000A;
 530                 else
 531                         mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 532         }
 533
 534         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 535                  "not allowing power-up and not having nvm_file\n"))
 536                 goto out_free;
 537
 538         /*
 539          * Even if nvm exists in the nvm_file driver should read again the nvm
 540          * from the nic because there might be entries that exist in the OTP
 541          * and not in the file.
 542          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 543          */
 544         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 545                 err = iwl_nvm_init(mvm, false);
 546                 if (err)
 547                         goto out_free;
 548         } else {
 549                 err = iwl_trans_start_hw(mvm->trans);
 550                 if (err)
 551                         goto out_free;
 552
 553                 mutex_lock(&mvm->mutex);
 554                 err = iwl_run_init_mvm_ucode(mvm, true);
 555                 if (!err || !iwlmvm_mod_params.init_dbg)
 556                         iwl_trans_stop_device(trans);
 557                 mutex_unlock(&mvm->mutex);
 558                 /* returns 0 if successful, 1 if success but in rfkill */
 559                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 560                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 561                         goto out_free;
 562                 }
 563         }
 564
 565         scan_size = iwl_mvm_scan_size(mvm);
 566
 567         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 568         if (!mvm->scan_cmd)
 569                 goto out_free;
 570
 571         /* Set EBS as successful as long as not stated otherwise by the FW. */
 572         mvm->last_ebs_successful = true;
 573
 574         err = iwl_mvm_mac_setup_register(mvm);
 575         if (err)
 576                 goto out_free;
 577
 578         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 579         if (err)
 580                 goto out_unregister;
 581
 582         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 583
 584         /* rpm starts with a taken ref. only set the appropriate bit here. */
 585         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 586
 587         return op_mode;
 588
 589  out_unregister:
 590         ieee80211_unregister_hw(mvm->hw);
 591         iwl_mvm_leds_exit(mvm);
 592  out_free:
 593         iwl_phy_db_free(mvm->phy_db);
 594         kfree(mvm->scan_cmd);
 595         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 596                 iwl_trans_op_mode_leave(trans);
 597         ieee80211_free_hw(mvm->hw);
 598         return NULL;
 599 }
 600
 601 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 602 {
 603         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 604         int i;
 605
 606         iwl_mvm_leds_exit(mvm);
 607
 608         iwl_mvm_tt_exit(mvm);
 609
 610         ieee80211_unregister_hw(mvm->hw);
 611
 612         kfree(mvm->scan_cmd);
 613         kfree(mvm->mcast_filter_cmd);
 614         mvm->mcast_filter_cmd = NULL;
 615
 616 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 617         kfree(mvm->d3_resume_sram);
 618         if (mvm->nd_config) {
 619                 kfree(mvm->nd_config->match_sets);
 620                 kfree(mvm->nd_config);
 621                 mvm->nd_config = NULL;
 622         }
 623 #endif
 624
 625         iwl_trans_op_mode_leave(mvm->trans);
 626
 627         iwl_phy_db_free(mvm->phy_db);
 628         mvm->phy_db = NULL;
 629
 630         iwl_free_nvm_data(mvm->nvm_data);
 631         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 632                 kfree(mvm->nvm_sections[i].data);
 633
 634         ieee80211_free_hw(mvm->hw);
 635 }
 636
 637 struct iwl_async_handler_entry {
 638         struct list_head list;
 639         struct iwl_rx_cmd_buffer rxb;
 640         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 641                   struct iwl_device_cmd *cmd);
 642 };
 643
 644 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 645 {
 646         struct iwl_async_handler_entry *entry, *tmp;
 647
 648         spin_lock_bh(&mvm->async_handlers_lock);
 649         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 650                 iwl_free_rxb(&entry->rxb);
 651                 list_del(&entry->list);
 652                 kfree(entry);
 653         }
 654         spin_unlock_bh(&mvm->async_handlers_lock);
 655 }
 656
 657 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 658 {
 659         struct iwl_mvm *mvm =
 660                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 661         struct iwl_async_handler_entry *entry, *tmp;
 662         struct list_head local_list;
 663
 664         INIT_LIST_HEAD(&local_list);
 665
 666         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 667         mutex_lock(&mvm->mutex);
 668
 669         /*
 670          * Sync with Rx path with a lock. Remove all the entries from this list,
 671          * add them to a local one (lock free), and then handle them.
 672          */
 673         spin_lock_bh(&mvm->async_handlers_lock);
 674         list_splice_init(&mvm->async_handlers_list, &local_list);
 675         spin_unlock_bh(&mvm->async_handlers_lock);
 676
 677         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 678                 if (entry->fn(mvm, &entry->rxb, NULL))
 679                         IWL_WARN(mvm,
 680                                  "returned value from ASYNC handlers are ignored\n");
 681                 iwl_free_rxb(&entry->rxb);
 682                 list_del(&entry->list);
 683                 kfree(entry);
 684         }
 685         mutex_unlock(&mvm->mutex);
 686 }
 687
 688 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 689                                struct iwl_rx_cmd_buffer *rxb,
 690                                struct iwl_device_cmd *cmd)
 691 {
 692         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 693         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 694         u8 i;
 695
 696         /*
 697          * Do the notification wait before RX handlers so
 698          * even if the RX handler consumes the RXB we have
 699          * access to it in the notification wait entry.
 700          */
 701         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 702
 703         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 704                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 705                 struct iwl_async_handler_entry *entry;
 706
 707                 if (rx_h->cmd_id != pkt->hdr.cmd)
 708                         continue;
 709
 710                 if (!rx_h->async)
 711                         return rx_h->fn(mvm, rxb, cmd);
 712
 713                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 714                 /* we can't do much... */
 715                 if (!entry)
 716                         return 0;
 717
 718                 entry->rxb._page = rxb_steal_page(rxb);
 719                 entry->rxb._offset = rxb->_offset;
 720                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 721                 entry->fn = rx_h->fn;
 722                 spin_lock(&mvm->async_handlers_lock);
 723                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 724                 spin_unlock(&mvm->async_handlers_lock);
 725                 schedule_work(&mvm->async_handlers_wk);
 726                 break;
 727         }
 728
 729         return 0;
 730 }
 731
 732 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 733 {
 734         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 735         int mq = mvm->queue_to_mac80211[queue];
 736
 737         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 738                 return;
 739
 740         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 741                 IWL_DEBUG_TX_QUEUES(mvm,
 742                                     "queue %d (mac80211 %d) already stopped\n",
 743                                     queue, mq);
 744                 return;
 745         }
 746
 747         ieee80211_stop_queue(mvm->hw, mq);
 748 }
 749
 750 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 751 {
 752         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 753         int mq = mvm->queue_to_mac80211[queue];
 754
 755         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 756                 return;
 757
 758         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 759                 IWL_DEBUG_TX_QUEUES(mvm,
 760                                     "queue %d (mac80211 %d) still stopped\n",
 761                                     queue, mq);
 762                 return;
 763         }
 764
 765         ieee80211_wake_queue(mvm->hw, mq);
 766 }
 767
 768 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 769 {
 770         if (state)
 771                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 772         else
 773                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 774
 775         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 776 }
 777
 778 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 779 {
 780         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 781         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 782
 783         if (state)
 784                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 785         else
 786                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 787
 788         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 789
 790         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 791         if (calibrating)
 792                 iwl_abort_notification_waits(&mvm->notif_wait);
 793
 794         /*
 795          * Stop the device if we run OPERATIONAL firmware or if we are in the
 796          * middle of the calibrations.
 797          */
 798         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 799 }
 800
 801 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 802 {
 803         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 804         struct ieee80211_tx_info *info;
 805
 806         info = IEEE80211_SKB_CB(skb);
 807         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 808         ieee80211_free_txskb(mvm->hw, skb);
 809 }
 810
 811 struct iwl_mvm_reprobe {
 812         struct device *dev;
 813         struct work_struct work;
 814 };
 815
 816 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 817 {
 818         struct iwl_mvm_reprobe *reprobe;
 819
 820         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 821         if (device_reprobe(reprobe->dev))
 822                 dev_err(reprobe->dev, "reprobe failed!\n");
 823         kfree(reprobe);
 824         module_put(THIS_MODULE);
 825 }
 826
 827 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 828 {
 829         struct iwl_mvm *mvm =
 830                 container_of(work, struct iwl_mvm, fw_error_dump_wk);
 831
 832         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 833                 return;
 834
 835         mutex_lock(&mvm->mutex);
 836         iwl_mvm_fw_error_dump(mvm);
 837
 838         /* start recording again if the firmware is not crashed */
 839         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 840                       mvm->fw->dbg_dest_tlv &&
 841                       iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 842
 843         mutex_unlock(&mvm->mutex);
 844
 845         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 846 }
 847
 848 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 849 {
 850         iwl_abort_notification_waits(&mvm->notif_wait);
 851
 852         /*
 853          * This is a bit racy, but worst case we tell mac80211 about
 854          * a stopped/aborted scan when that was already done which
 855          * is not a problem. It is necessary to abort any os scan
 856          * here because mac80211 requires having the scan cleared
 857          * before restarting.
 858          * We'll reset the scan_status to NONE in restart cleanup in
 859          * the next start() call from mac80211. If restart isn't called
 860          * (no fw restart) scan status will stay busy.
 861          */
 862         switch (mvm->scan_status) {
 863         case IWL_MVM_SCAN_NONE:
 864                 break;
 865         case IWL_MVM_SCAN_OS:
 866                 ieee80211_scan_completed(mvm->hw, true);
 867                 break;
 868         case IWL_MVM_SCAN_SCHED:
 869                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 870                 if (!mvm->restart_fw)
 871                         ieee80211_sched_scan_stopped(mvm->hw);
 872                 break;
 873         }
 874
 875         /*
 876          * If we're restarting already, don't cycle restarts.
 877          * If INIT fw asserted, it will likely fail again.
 878          * If WoWLAN fw asserted, don't restart either, mac80211
 879          * can't recover this since we're already half suspended.
 880          */
 881         if (!mvm->restart_fw && fw_error) {
 882                 schedule_work(&mvm->fw_error_dump_wk);
 883         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 884                                     &mvm->status)) {
 885                 struct iwl_mvm_reprobe *reprobe;
 886
 887                 IWL_ERR(mvm,
 888                         "Firmware error during reconfiguration - reprobe!\n");
 889
 890                 /*
 891                  * get a module reference to avoid doing this while unloading
 892                  * anyway and to avoid scheduling a work with code that's
 893                  * being removed.
 894                  */
 895                 if (!try_module_get(THIS_MODULE)) {
 896                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 897                         return;
 898                 }
 899
 900                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 901                 if (!reprobe) {
 902                         module_put(THIS_MODULE);
 903                         return;
 904                 }
 905                 reprobe->dev = mvm->trans->dev;
 906                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 907                 schedule_work(&reprobe->work);
 908         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 909                 /* don't let the transport/FW power down */
 910                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 911
 912                 if (fw_error && mvm->restart_fw > 0)
 913                         mvm->restart_fw--;
 914                 ieee80211_restart_hw(mvm->hw);
 915         }
 916 }
 917
 918 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 919 {
 920         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 921
 922         iwl_mvm_dump_nic_error_log(mvm);
 923
 924         iwl_mvm_nic_restart(mvm, true);
 925 }
 926
 927 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 928 {
 929         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 930
 931         WARN_ON(1);
 932         iwl_mvm_nic_restart(mvm, true);
 933 }
 934
 935 struct iwl_d0i3_iter_data {
 936         struct iwl_mvm *mvm;
 937         u8 ap_sta_id;
 938         u8 vif_count;
 939         u8 offloading_tid;
 940         bool disable_offloading;
 941 };
 942
 943 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 944                                         struct ieee80211_vif *vif,
 945                                         struct iwl_d0i3_iter_data *iter_data)
 946 {
 947         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 948         struct ieee80211_sta *ap_sta;
 949         struct iwl_mvm_sta *mvmsta;
 950         u32 available_tids = 0;
 951         u8 tid;
 952
 953         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 954                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 955                 return false;
 956
 957         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 958         if (IS_ERR_OR_NULL(ap_sta))
 959                 return false;
 960
 961         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 962         spin_lock_bh(&mvmsta->lock);
 963         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 964                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 965
 966                 /*
 967                  * in case of pending tx packets, don't use this tid
 968                  * for offloading in order to prevent reuse of the same
 969                  * qos seq counters.
 970                  */
 971                 if (iwl_mvm_tid_queued(tid_data))
 972                         continue;
 973
 974                 if (tid_data->state != IWL_AGG_OFF)
 975                         continue;
 976
 977                 available_tids |= BIT(tid);
 978         }
 979         spin_unlock_bh(&mvmsta->lock);
 980
 981         /*
 982          * disallow protocol offloading if we have no available tid
 983          * (with no pending frames and no active aggregation,
 984          * as we don't handle "holes" properly - the scheduler needs the
 985          * frame's seq number and TFD index to match)
 986          */
 987         if (!available_tids)
 988                 return true;
 989
 990         /* for simplicity, just use the first available tid */
 991         iter_data->offloading_tid = ffs(available_tids) - 1;
 992         return false;
 993 }
 994
 995 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 996                                         struct ieee80211_vif *vif)
 997 {
 998         struct iwl_d0i3_iter_data *data = _data;
 999         struct iwl_mvm *mvm = data->mvm;
1000         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1001         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1002
1003         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1004         if (vif->type != NL80211_IFTYPE_STATION ||
1005             !vif->bss_conf.assoc)
1006                 return;
1007
1008         /*
1009          * in case of pending tx packets or active aggregations,
1010          * avoid offloading features in order to prevent reuse of
1011          * the same qos seq counters.
1012          */
1013         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1014                 data->disable_offloading = true;
1015
1016         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1017         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1018
1019         /*
1020          * on init/association, mvm already configures POWER_TABLE_CMD
1021          * and REPLY_MCAST_FILTER_CMD, so currently don't
1022          * reconfigure them (we might want to use different
1023          * params later on, though).
1024          */
1025         data->ap_sta_id = mvmvif->ap_sta_id;
1026         data->vif_count++;
1027 }
1028
1029 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1030                                     struct iwl_wowlan_config_cmd *cmd,
1031                                     struct iwl_d0i3_iter_data *iter_data)
1032 {
1033         struct ieee80211_sta *ap_sta;
1034         struct iwl_mvm_sta *mvm_ap_sta;
1035
1036         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1037                 return;
1038
1039         rcu_read_lock();
1040
1041         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1042         if (IS_ERR_OR_NULL(ap_sta))
1043                 goto out;
1044
1045         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1046         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1047         cmd->offloading_tid = iter_data->offloading_tid;
1048
1049         /*
1050          * The d0i3 uCode takes care of the nonqos counters,
1051          * so configure only the qos seq ones.
1052          */
1053         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1054 out:
1055         rcu_read_unlock();
1056 }
1057
1058 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1059 {
1060         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1061         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1062         int ret;
1063         struct iwl_d0i3_iter_data d0i3_iter_data = {
1064                 .mvm = mvm,
1065         };
1066         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1067                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1068                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1069                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1070                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1071         };
1072         struct iwl_d3_manager_config d3_cfg_cmd = {
1073                 .min_sleep_time = cpu_to_le32(1000),
1074                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1075         };
1076
1077         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1078
1079         /* make sure we have no running tx while configuring the qos */
1080         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1081         synchronize_net();
1082
1083         /*
1084          * iwl_mvm_ref_sync takes a reference before checking the flag.
1085          * so by checking there is no held reference we prevent a state
1086          * in which iwl_mvm_ref_sync continues successfully while we
1087          * configure the firmware to enter d0i3
1088          */
1089         if (iwl_mvm_ref_taken(mvm)) {
1090                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1091                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1092                 wake_up(&mvm->d0i3_exit_waitq);
1093                 return 1;
1094         }
1095
1096         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1097                                                    IEEE80211_IFACE_ITER_NORMAL,
1098                                                    iwl_mvm_enter_d0i3_iterator,
1099                                                    &d0i3_iter_data);
1100         if (d0i3_iter_data.vif_count == 1) {
1101                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1102                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1103         } else {
1104                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1105                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1106                 mvm->d0i3_offloading = false;
1107         }
1108
1109         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1110         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1111                                    sizeof(wowlan_config_cmd),
1112                                    &wowlan_config_cmd);
1113         if (ret)
1114                 return ret;
1115
1116         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1117                                     flags | CMD_MAKE_TRANS_IDLE,
1118                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1119 }
1120
1121 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1122                                        struct ieee80211_vif *vif)
1123 {
1124         struct iwl_mvm *mvm = _data;
1125         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1126
1127         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1128         if (vif->type != NL80211_IFTYPE_STATION ||
1129             !vif->bss_conf.assoc)
1130                 return;
1131
1132         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1133 }
1134
1135 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1136                                          struct ieee80211_vif *vif)
1137 {
1138         struct iwl_mvm *mvm = data;
1139         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1140
1141         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1142             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1143                 ieee80211_connection_loss(vif);
1144 }
1145
1146 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1147 {
1148         struct ieee80211_sta *sta = NULL;
1149         struct iwl_mvm_sta *mvm_ap_sta;
1150         int i;
1151         bool wake_queues = false;
1152
1153         lockdep_assert_held(&mvm->mutex);
1154
1155         spin_lock_bh(&mvm->d0i3_tx_lock);
1156
1157         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1158                 goto out;
1159
1160         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1161
1162         /* get the sta in order to update seq numbers and re-enqueue skbs */
1163         sta = rcu_dereference_protected(
1164                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1165                         lockdep_is_held(&mvm->mutex));
1166
1167         if (IS_ERR_OR_NULL(sta)) {
1168                 sta = NULL;
1169                 goto out;
1170         }
1171
1172         if (mvm->d0i3_offloading && qos_seq) {
1173                 /* update qos seq numbers if offloading was enabled */
1174                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1175                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1176                         u16 seq = le16_to_cpu(qos_seq[i]);
1177                         /* firmware stores last-used one, we store next one */
1178                         seq += 0x10;
1179                         mvm_ap_sta->tid_data[i].seq_number = seq;
1180                 }
1181         }
1182 out:
1183         /* re-enqueue (or drop) all packets */
1184         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1185                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1186
1187                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1188                         ieee80211_free_txskb(mvm->hw, skb);
1189
1190                 /* if the skb_queue is not empty, we need to wake queues */
1191                 wake_queues = true;
1192         }
1193         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1194         wake_up(&mvm->d0i3_exit_waitq);
1195         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1196         if (wake_queues)
1197                 ieee80211_wake_queues(mvm->hw);
1198
1199         spin_unlock_bh(&mvm->d0i3_tx_lock);
1200 }
1201
1202 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1203 {
1204         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1205         struct iwl_host_cmd get_status_cmd = {
1206                 .id = WOWLAN_GET_STATUSES,
1207                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1208         };
1209         struct iwl_wowlan_status *status;
1210         int ret;
1211         u32 disconnection_reasons, wakeup_reasons;
1212         __le16 *qos_seq = NULL;
1213
1214         mutex_lock(&mvm->mutex);
1215         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1216         if (ret)
1217                 goto out;
1218
1219         if (!get_status_cmd.resp_pkt)
1220                 goto out;
1221
1222         status = (void *)get_status_cmd.resp_pkt->data;
1223         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1224         qos_seq = status->qos_seq_ctr;
1225
1226         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1227
1228         disconnection_reasons =
1229                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1230                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1231         if (wakeup_reasons & disconnection_reasons)
1232                 ieee80211_iterate_active_interfaces(
1233                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1234                         iwl_mvm_d0i3_disconnect_iter, mvm);
1235
1236         iwl_free_resp(&get_status_cmd);
1237 out:
1238         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1239         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1240         mutex_unlock(&mvm->mutex);
1241 }
1242
1243 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1244 {
1245         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1246                     CMD_WAKE_UP_TRANS;
1247         int ret;
1248
1249         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1250
1251         mutex_lock(&mvm->d0i3_suspend_mutex);
1252         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1253                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1254                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1255                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1256                 return 0;
1257         }
1258         mutex_unlock(&mvm->d0i3_suspend_mutex);
1259
1260         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1261         if (ret)
1262                 goto out;
1263
1264         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1265                                                    IEEE80211_IFACE_ITER_NORMAL,
1266                                                    iwl_mvm_exit_d0i3_iterator,
1267                                                    mvm);
1268 out:
1269         schedule_work(&mvm->d0i3_exit_work);
1270         return ret;
1271 }
1272
1273 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1274 {
1275         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1276
1277         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1278         return _iwl_mvm_exit_d0i3(mvm);
1279 }
1280
1281 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1282                              struct napi_struct *napi,
1283                              struct net_device *napi_dev,
1284                              int (*poll)(struct napi_struct *, int),
1285                              int weight)
1286 {
1287         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1288
1289         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1290 }
1291
1292 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1293         .start = iwl_op_mode_mvm_start,
1294         .stop = iwl_op_mode_mvm_stop,
1295         .rx = iwl_mvm_rx_dispatch,
1296         .queue_full = iwl_mvm_stop_sw_queue,
1297         .queue_not_full = iwl_mvm_wake_sw_queue,
1298         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1299         .free_skb = iwl_mvm_free_skb,
1300         .nic_error = iwl_mvm_nic_error,
1301         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1302         .nic_config = iwl_mvm_nic_config,
1303         .enter_d0i3 = iwl_mvm_enter_d0i3,
1304         .exit_d0i3 = iwl_mvm_exit_d0i3,
1305         .napi_add = iwl_mvm_napi_add,
1306 };