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 - 2015 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.
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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
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  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 - 2015 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
  86 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  88 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  89 MODULE_LICENSE("GPL");
  90
  91 static const struct iwl_op_mode_ops iwl_mvm_ops;
  92
  93 struct iwl_mvm_mod_params iwlmvm_mod_params = {
  94         .power_scheme = IWL_POWER_SCHEME_BPS,
  95         .tfd_q_hang_detect = true
  96         /* rest of fields are 0 by default */
  97 };
  98
  99 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 100 MODULE_PARM_DESC(init_dbg,
 101                  "set to true to debug an ASSERT in INIT fw (default: false");
 102 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 103 MODULE_PARM_DESC(power_scheme,
 104                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 105 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
 106                    bool, S_IRUGO);
 107 MODULE_PARM_DESC(tfd_q_hang_detect,
 108                  "TFD queues hang detection (default: true");
 109
 110 /*
 111  * module init and exit functions
 112  */
 113 static int __init iwl_mvm_init(void)
 114 {
 115         int ret;
 116
 117         ret = iwl_mvm_rate_control_register();
 118         if (ret) {
 119                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 120                 return ret;
 121         }
 122
 123         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 124
 125         if (ret) {
 126                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 127                 iwl_mvm_rate_control_unregister();
 128         }
 129
 130         return ret;
 131 }
 132 module_init(iwl_mvm_init);
 133
 134 static void __exit iwl_mvm_exit(void)
 135 {
 136         iwl_opmode_deregister("iwlmvm");
 137         iwl_mvm_rate_control_unregister();
 138 }
 139 module_exit(iwl_mvm_exit);
 140
 141 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 142 {
 143         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 144         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 145         u32 reg_val = 0;
 146         u32 phy_config = iwl_mvm_get_phy_config(mvm);
 147
 148         radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 149                          FW_PHY_CFG_RADIO_TYPE_POS;
 150         radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
 151                          FW_PHY_CFG_RADIO_STEP_POS;
 152         radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
 153                          FW_PHY_CFG_RADIO_DASH_POS;
 154
 155         /* SKU control */
 156         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 157                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 158         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 160
 161         /* radio configuration */
 162         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 163         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 164         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 165
 166         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 167                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 168
 169         /*
 170          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 171          * shouldn't be set to any non-zero value. The same is supposed to be
 172          * true of the other HW, but unsetting them (such as the 7260) causes
 173          * automatic tests to fail on seemingly unrelated errors. Need to
 174          * further investigate this, but for now we'll separate cases.
 175          */
 176         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 177                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 178
 179         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 180                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 181                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 182                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 185                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 186                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 187                                 reg_val);
 188
 189         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 190                        radio_cfg_step, radio_cfg_dash);
 191
 192         /*
 193          * W/A : NIC is stuck in a reset state after Early PCIe power off
 194          * (PCIe power is lost before PERST# is asserted), causing ME FW
 195          * to lose ownership and not being able to obtain it back.
 196          */
 197         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 198                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 199                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 200                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 201 }
 202
 203 struct iwl_rx_handlers {
 204         u8 cmd_id;
 205         bool async;
 206         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 207                   struct iwl_device_cmd *cmd);
 208 };
 209
 210 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 211         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 212
 213 /*
 214  * Handlers for fw notifications
 215  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 216  * This list should be in order of frequency for performance purposes.
 217  *
 218  * The handler can be SYNC - this means that it will be called in the Rx path
 219  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 220  * only in this case!), it should be set as ASYNC. In that case, it will be
 221  * called from a worker with mvm->mutex held.
 222  */
 223 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 224         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 225         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 226         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 227         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 228
 229         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 230         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 231         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 232         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 233                    iwl_mvm_rx_ant_coupling_notif, true),
 234
 235         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 236         RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
 237
 238         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 239
 240         RX_HANDLER(SCAN_ITERATION_COMPLETE,
 241                    iwl_mvm_rx_scan_offload_iter_complete_notif, false),
 242         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 243                    iwl_mvm_rx_scan_offload_complete_notif, true),
 244         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
 245                    false),
 246         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 247                    true),
 248
 249         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 250
 251         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 252                    false),
 253
 254         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 255         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 256                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 257         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 258
 259         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 260                    true),
 261         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 262
 263 };
 264 #undef RX_HANDLER
 265 #define CMD(x) [x] = #x
 266
 267 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 268         CMD(MVM_ALIVE),
 269         CMD(REPLY_ERROR),
 270         CMD(INIT_COMPLETE_NOTIF),
 271         CMD(PHY_CONTEXT_CMD),
 272         CMD(MGMT_MCAST_KEY),
 273         CMD(TX_CMD),
 274         CMD(TXPATH_FLUSH),
 275         CMD(SHARED_MEM_CFG),
 276         CMD(MAC_CONTEXT_CMD),
 277         CMD(TIME_EVENT_CMD),
 278         CMD(TIME_EVENT_NOTIFICATION),
 279         CMD(BINDING_CONTEXT_CMD),
 280         CMD(TIME_QUOTA_CMD),
 281         CMD(NON_QOS_TX_COUNTER_CMD),
 282         CMD(SCAN_REQUEST_CMD),
 283         CMD(SCAN_ABORT_CMD),
 284         CMD(SCAN_START_NOTIFICATION),
 285         CMD(SCAN_RESULTS_NOTIFICATION),
 286         CMD(SCAN_COMPLETE_NOTIFICATION),
 287         CMD(NVM_ACCESS_CMD),
 288         CMD(PHY_CONFIGURATION_CMD),
 289         CMD(CALIB_RES_NOTIF_PHY_DB),
 290         CMD(SET_CALIB_DEFAULT_CMD),
 291         CMD(ADD_STA_KEY),
 292         CMD(ADD_STA),
 293         CMD(REMOVE_STA),
 294         CMD(LQ_CMD),
 295         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 296         CMD(MATCH_FOUND_NOTIFICATION),
 297         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 298         CMD(SCAN_OFFLOAD_ABORT_CMD),
 299         CMD(HOT_SPOT_CMD),
 300         CMD(SCAN_OFFLOAD_COMPLETE),
 301         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 302         CMD(SCAN_ITERATION_COMPLETE),
 303         CMD(POWER_TABLE_CMD),
 304         CMD(WEP_KEY),
 305         CMD(REPLY_RX_PHY_CMD),
 306         CMD(REPLY_RX_MPDU_CMD),
 307         CMD(BEACON_NOTIFICATION),
 308         CMD(BEACON_TEMPLATE_CMD),
 309         CMD(STATISTICS_CMD),
 310         CMD(STATISTICS_NOTIFICATION),
 311         CMD(EOSP_NOTIFICATION),
 312         CMD(REDUCE_TX_POWER_CMD),
 313         CMD(TX_ANT_CONFIGURATION_CMD),
 314         CMD(D3_CONFIG_CMD),
 315         CMD(D0I3_END_CMD),
 316         CMD(PROT_OFFLOAD_CONFIG_CMD),
 317         CMD(OFFLOADS_QUERY_CMD),
 318         CMD(REMOTE_WAKE_CONFIG_CMD),
 319         CMD(WOWLAN_PATTERNS),
 320         CMD(WOWLAN_CONFIGURATION),
 321         CMD(WOWLAN_TSC_RSC_PARAM),
 322         CMD(WOWLAN_TKIP_PARAM),
 323         CMD(WOWLAN_KEK_KCK_MATERIAL),
 324         CMD(WOWLAN_GET_STATUSES),
 325         CMD(WOWLAN_TX_POWER_PER_DB),
 326         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 327         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 328         CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
 329         CMD(CARD_STATE_NOTIFICATION),
 330         CMD(MISSED_BEACONS_NOTIFICATION),
 331         CMD(BT_COEX_PRIO_TABLE),
 332         CMD(BT_COEX_PROT_ENV),
 333         CMD(BT_PROFILE_NOTIFICATION),
 334         CMD(BT_CONFIG),
 335         CMD(MCAST_FILTER_CMD),
 336         CMD(BCAST_FILTER_CMD),
 337         CMD(REPLY_SF_CFG_CMD),
 338         CMD(REPLY_BEACON_FILTERING_CMD),
 339         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 340         CMD(DTS_MEASUREMENT_NOTIFICATION),
 341         CMD(REPLY_THERMAL_MNG_BACKOFF),
 342         CMD(MAC_PM_POWER_TABLE),
 343         CMD(LTR_CONFIG),
 344         CMD(BT_COEX_CI),
 345         CMD(BT_COEX_UPDATE_SW_BOOST),
 346         CMD(BT_COEX_UPDATE_CORUN_LUT),
 347         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 348         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 349         CMD(ANTENNA_COUPLING_NOTIFICATION),
 350         CMD(SCD_QUEUE_CFG),
 351         CMD(SCAN_CFG_CMD),
 352         CMD(SCAN_REQ_UMAC),
 353         CMD(SCAN_ABORT_UMAC),
 354         CMD(SCAN_COMPLETE_UMAC),
 355         CMD(TDLS_CHANNEL_SWITCH_CMD),
 356         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 357         CMD(TDLS_CONFIG_CMD),
 358         CMD(MCC_UPDATE_CMD),
 359 };
 360 #undef CMD
 361
 362 /* this forward declaration can avoid to export the function */
 363 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 364 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 365
 366 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 367 {
 368         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 369
 370         if (!pwr_tx_backoff)
 371                 return 0;
 372
 373         while (pwr_tx_backoff->pwr) {
 374                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 375                         return pwr_tx_backoff->backoff;
 376
 377                 pwr_tx_backoff++;
 378         }
 379
 380         return 0;
 381 }
 382
 383 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 384
 385 static struct iwl_op_mode *
 386 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 387                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 388 {
 389         struct ieee80211_hw *hw;
 390         struct iwl_op_mode *op_mode;
 391         struct iwl_mvm *mvm;
 392         struct iwl_trans_config trans_cfg = {};
 393         static const u8 no_reclaim_cmds[] = {
 394                 TX_CMD,
 395         };
 396         int err, scan_size;
 397         u32 min_backoff;
 398
 399         /*
 400          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 401          * index all over the driver - check that its value corresponds to the
 402          * array size.
 403          */
 404         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 405
 406         /********************************
 407          * 1. Allocating and configuring HW data
 408          ********************************/
 409         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 410                                 sizeof(struct iwl_mvm),
 411                                 &iwl_mvm_hw_ops);
 412         if (!hw)
 413                 return NULL;
 414
 415         if (cfg->max_rx_agg_size)
 416                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 417
 418         if (cfg->max_tx_agg_size)
 419                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 420
 421         op_mode = hw->priv;
 422         op_mode->ops = &iwl_mvm_ops;
 423
 424         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 425         mvm->dev = trans->dev;
 426         mvm->trans = trans;
 427         mvm->cfg = cfg;
 428         mvm->fw = fw;
 429         mvm->hw = hw;
 430
 431         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 432
 433         mvm->aux_queue = 15;
 434         mvm->first_agg_queue = 16;
 435         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 436         if (mvm->cfg->base_params->num_of_queues == 16) {
 437                 mvm->aux_queue = 11;
 438                 mvm->first_agg_queue = 12;
 439         }
 440         mvm->sf_state = SF_UNINIT;
 441         mvm->low_latency_agg_frame_limit = 6;
 442         mvm->cur_ucode = IWL_UCODE_INIT;
 443
 444         mutex_init(&mvm->mutex);
 445         mutex_init(&mvm->d0i3_suspend_mutex);
 446         spin_lock_init(&mvm->async_handlers_lock);
 447         INIT_LIST_HEAD(&mvm->time_event_list);
 448         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 449         INIT_LIST_HEAD(&mvm->async_handlers_list);
 450         spin_lock_init(&mvm->time_event_lock);
 451
 452         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 453         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 454         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 455         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 456         INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
 457         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
 458
 459         spin_lock_init(&mvm->d0i3_tx_lock);
 460         spin_lock_init(&mvm->refs_lock);
 461         skb_queue_head_init(&mvm->d0i3_tx);
 462         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 463
 464         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 465
 466         /*
 467          * Populate the state variables that the transport layer needs
 468          * to know about.
 469          */
 470         trans_cfg.op_mode = op_mode;
 471         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 472         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 473         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 474
 475         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 476                 trans_cfg.bc_table_dword = true;
 477
 478         trans_cfg.command_names = iwl_mvm_cmd_strings;
 479
 480         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 481         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 482         trans_cfg.scd_set_active = true;
 483
 484         trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
 485
 486         /* Set a short watchdog for the command queue */
 487         trans_cfg.cmd_q_wdg_timeout =
 488                 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
 489
 490         snprintf(mvm->hw->wiphy->fw_version,
 491                  sizeof(mvm->hw->wiphy->fw_version),
 492                  "%s", fw->fw_version);
 493
 494         /* Configure transport layer */
 495         iwl_trans_configure(mvm->trans, &trans_cfg);
 496
 497         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 498         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 499         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 500         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 501         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 502                sizeof(trans->dbg_conf_tlv));
 503         trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
 504
 505         /* set up notification wait support */
 506         iwl_notification_wait_init(&mvm->notif_wait);
 507
 508         /* Init phy db */
 509         mvm->phy_db = iwl_phy_db_init(trans);
 510         if (!mvm->phy_db) {
 511                 IWL_ERR(mvm, "Cannot init phy_db\n");
 512                 goto out_free;
 513         }
 514
 515         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 516                  mvm->cfg->name, mvm->trans->hw_rev);
 517
 518         min_backoff = calc_min_backoff(trans, cfg);
 519         iwl_mvm_tt_initialize(mvm, min_backoff);
 520
 521         if (iwlwifi_mod_params.nvm_file)
 522                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 523         else
 524                 IWL_DEBUG_EEPROM(mvm->trans->dev,
 525                                  "working without external nvm file\n");
 526
 527         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 528                  "not allowing power-up and not having nvm_file\n"))
 529                 goto out_free;
 530
 531         /*
 532          * Even if nvm exists in the nvm_file driver should read again the nvm
 533          * from the nic because there might be entries that exist in the OTP
 534          * and not in the file.
 535          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 536          */
 537         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 538                 err = iwl_nvm_init(mvm, false);
 539                 if (err)
 540                         goto out_free;
 541         } else {
 542                 err = iwl_trans_start_hw(mvm->trans);
 543                 if (err)
 544                         goto out_free;
 545
 546                 mutex_lock(&mvm->mutex);
 547                 err = iwl_run_init_mvm_ucode(mvm, true);
 548                 if (!err || !iwlmvm_mod_params.init_dbg)
 549                         iwl_trans_stop_device(trans);
 550                 mutex_unlock(&mvm->mutex);
 551                 /* returns 0 if successful, 1 if success but in rfkill */
 552                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 553                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 554                         goto out_free;
 555                 }
 556         }
 557
 558         scan_size = iwl_mvm_scan_size(mvm);
 559
 560         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 561         if (!mvm->scan_cmd)
 562                 goto out_free;
 563
 564         /* Set EBS as successful as long as not stated otherwise by the FW. */
 565         mvm->last_ebs_successful = true;
 566
 567         err = iwl_mvm_mac_setup_register(mvm);
 568         if (err)
 569                 goto out_free;
 570
 571         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 572         if (err)
 573                 goto out_unregister;
 574
 575         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 576
 577         /* rpm starts with a taken ref. only set the appropriate bit here. */
 578         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 579
 580         return op_mode;
 581
 582  out_unregister:
 583         ieee80211_unregister_hw(mvm->hw);
 584         iwl_mvm_leds_exit(mvm);
 585  out_free:
 586         iwl_phy_db_free(mvm->phy_db);
 587         kfree(mvm->scan_cmd);
 588         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 589                 iwl_trans_op_mode_leave(trans);
 590         ieee80211_free_hw(mvm->hw);
 591         return NULL;
 592 }
 593
 594 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 595 {
 596         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 597         int i;
 598
 599         iwl_mvm_leds_exit(mvm);
 600
 601         iwl_mvm_tt_exit(mvm);
 602
 603         ieee80211_unregister_hw(mvm->hw);
 604
 605         kfree(mvm->scan_cmd);
 606         kfree(mvm->mcast_filter_cmd);
 607         mvm->mcast_filter_cmd = NULL;
 608
 609 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 610         kfree(mvm->d3_resume_sram);
 611         if (mvm->nd_config) {
 612                 kfree(mvm->nd_config->match_sets);
 613                 kfree(mvm->nd_config);
 614                 mvm->nd_config = NULL;
 615         }
 616 #endif
 617
 618         iwl_trans_op_mode_leave(mvm->trans);
 619
 620         iwl_phy_db_free(mvm->phy_db);
 621         mvm->phy_db = NULL;
 622
 623         iwl_free_nvm_data(mvm->nvm_data);
 624         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 625                 kfree(mvm->nvm_sections[i].data);
 626
 627         ieee80211_free_hw(mvm->hw);
 628 }
 629
 630 struct iwl_async_handler_entry {
 631         struct list_head list;
 632         struct iwl_rx_cmd_buffer rxb;
 633         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 634                   struct iwl_device_cmd *cmd);
 635 };
 636
 637 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 638 {
 639         struct iwl_async_handler_entry *entry, *tmp;
 640
 641         spin_lock_bh(&mvm->async_handlers_lock);
 642         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 643                 iwl_free_rxb(&entry->rxb);
 644                 list_del(&entry->list);
 645                 kfree(entry);
 646         }
 647         spin_unlock_bh(&mvm->async_handlers_lock);
 648 }
 649
 650 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 651 {
 652         struct iwl_mvm *mvm =
 653                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 654         struct iwl_async_handler_entry *entry, *tmp;
 655         struct list_head local_list;
 656
 657         INIT_LIST_HEAD(&local_list);
 658
 659         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 660         mutex_lock(&mvm->mutex);
 661
 662         /*
 663          * Sync with Rx path with a lock. Remove all the entries from this list,
 664          * add them to a local one (lock free), and then handle them.
 665          */
 666         spin_lock_bh(&mvm->async_handlers_lock);
 667         list_splice_init(&mvm->async_handlers_list, &local_list);
 668         spin_unlock_bh(&mvm->async_handlers_lock);
 669
 670         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 671                 if (entry->fn(mvm, &entry->rxb, NULL))
 672                         IWL_WARN(mvm,
 673                                  "returned value from ASYNC handlers are ignored\n");
 674                 iwl_free_rxb(&entry->rxb);
 675                 list_del(&entry->list);
 676                 kfree(entry);
 677         }
 678         mutex_unlock(&mvm->mutex);
 679 }
 680
 681 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
 682                                             struct iwl_rx_packet *pkt)
 683 {
 684         struct iwl_fw_dbg_trigger_tlv *trig;
 685         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
 686         int i;
 687
 688         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
 689                 return;
 690
 691         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
 692         cmds_trig = (void *)trig->data;
 693
 694         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 695                 return;
 696
 697         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
 698                 /* don't collect on CMD 0 */
 699                 if (!cmds_trig->cmds[i].cmd_id)
 700                         break;
 701
 702                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd)
 703                         continue;
 704
 705                 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
 706                                             "CMD 0x%02x received",
 707                                             pkt->hdr.cmd);
 708                 break;
 709         }
 710 }
 711
 712 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 713                                struct iwl_rx_cmd_buffer *rxb,
 714                                struct iwl_device_cmd *cmd)
 715 {
 716         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 717         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 718         u8 i;
 719
 720         iwl_mvm_rx_check_trigger(mvm, pkt);
 721
 722         /*
 723          * Do the notification wait before RX handlers so
 724          * even if the RX handler consumes the RXB we have
 725          * access to it in the notification wait entry.
 726          */
 727         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 728
 729         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 730                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 731                 struct iwl_async_handler_entry *entry;
 732
 733                 if (rx_h->cmd_id != pkt->hdr.cmd)
 734                         continue;
 735
 736                 if (!rx_h->async)
 737                         return rx_h->fn(mvm, rxb, cmd);
 738
 739                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 740                 /* we can't do much... */
 741                 if (!entry)
 742                         return 0;
 743
 744                 entry->rxb._page = rxb_steal_page(rxb);
 745                 entry->rxb._offset = rxb->_offset;
 746                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 747                 entry->fn = rx_h->fn;
 748                 spin_lock(&mvm->async_handlers_lock);
 749                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 750                 spin_unlock(&mvm->async_handlers_lock);
 751                 schedule_work(&mvm->async_handlers_wk);
 752                 break;
 753         }
 754
 755         return 0;
 756 }
 757
 758 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 759 {
 760         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 761         int mq = mvm->queue_to_mac80211[queue];
 762
 763         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 764                 return;
 765
 766         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 767                 IWL_DEBUG_TX_QUEUES(mvm,
 768                                     "queue %d (mac80211 %d) already stopped\n",
 769                                     queue, mq);
 770                 return;
 771         }
 772
 773         ieee80211_stop_queue(mvm->hw, mq);
 774 }
 775
 776 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 777 {
 778         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 779         int mq = mvm->queue_to_mac80211[queue];
 780
 781         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 782                 return;
 783
 784         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 785                 IWL_DEBUG_TX_QUEUES(mvm,
 786                                     "queue %d (mac80211 %d) still stopped\n",
 787                                     queue, mq);
 788                 return;
 789         }
 790
 791         ieee80211_wake_queue(mvm->hw, mq);
 792 }
 793
 794 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 795 {
 796         if (state)
 797                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 798         else
 799                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 800
 801         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 802 }
 803
 804 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 805 {
 806         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 807         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 808
 809         if (state)
 810                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 811         else
 812                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 813
 814         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 815
 816         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 817         if (calibrating)
 818                 iwl_abort_notification_waits(&mvm->notif_wait);
 819
 820         /*
 821          * Stop the device if we run OPERATIONAL firmware or if we are in the
 822          * middle of the calibrations.
 823          */
 824         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 825 }
 826
 827 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 828 {
 829         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 830         struct ieee80211_tx_info *info;
 831
 832         info = IEEE80211_SKB_CB(skb);
 833         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 834         ieee80211_free_txskb(mvm->hw, skb);
 835 }
 836
 837 struct iwl_mvm_reprobe {
 838         struct device *dev;
 839         struct work_struct work;
 840 };
 841
 842 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 843 {
 844         struct iwl_mvm_reprobe *reprobe;
 845
 846         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 847         if (device_reprobe(reprobe->dev))
 848                 dev_err(reprobe->dev, "reprobe failed!\n");
 849         kfree(reprobe);
 850         module_put(THIS_MODULE);
 851 }
 852
 853 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 854 {
 855         struct iwl_mvm *mvm =
 856                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 857
 858         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 859                 return;
 860
 861         mutex_lock(&mvm->mutex);
 862
 863         /* stop recording */
 864         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
 865                 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
 866         } else {
 867                 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
 868                 /* wait before we collect the data till the DBGC stop */
 869                 udelay(100);
 870         }
 871
 872         iwl_mvm_fw_error_dump(mvm);
 873
 874         /* start recording again if the firmware is not crashed */
 875         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 876                      mvm->fw->dbg_dest_tlv &&
 877                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 878
 879         mutex_unlock(&mvm->mutex);
 880
 881         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 882 }
 883
 884 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 885 {
 886         iwl_abort_notification_waits(&mvm->notif_wait);
 887
 888         /*
 889          * This is a bit racy, but worst case we tell mac80211 about
 890          * a stopped/aborted scan when that was already done which
 891          * is not a problem. It is necessary to abort any os scan
 892          * here because mac80211 requires having the scan cleared
 893          * before restarting.
 894          * We'll reset the scan_status to NONE in restart cleanup in
 895          * the next start() call from mac80211. If restart isn't called
 896          * (no fw restart) scan status will stay busy.
 897          */
 898         iwl_mvm_report_scan_aborted(mvm);
 899
 900         /*
 901          * If we're restarting already, don't cycle restarts.
 902          * If INIT fw asserted, it will likely fail again.
 903          * If WoWLAN fw asserted, don't restart either, mac80211
 904          * can't recover this since we're already half suspended.
 905          */
 906         if (!mvm->restart_fw && fw_error) {
 907                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
 908         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 909                                     &mvm->status)) {
 910                 struct iwl_mvm_reprobe *reprobe;
 911
 912                 IWL_ERR(mvm,
 913                         "Firmware error during reconfiguration - reprobe!\n");
 914
 915                 /*
 916                  * get a module reference to avoid doing this while unloading
 917                  * anyway and to avoid scheduling a work with code that's
 918                  * being removed.
 919                  */
 920                 if (!try_module_get(THIS_MODULE)) {
 921                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 922                         return;
 923                 }
 924
 925                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 926                 if (!reprobe) {
 927                         module_put(THIS_MODULE);
 928                         return;
 929                 }
 930                 reprobe->dev = mvm->trans->dev;
 931                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 932                 schedule_work(&reprobe->work);
 933         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 934                 /* don't let the transport/FW power down */
 935                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 936
 937                 if (fw_error && mvm->restart_fw > 0)
 938                         mvm->restart_fw--;
 939                 ieee80211_restart_hw(mvm->hw);
 940         }
 941 }
 942
 943 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 944 {
 945         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 946
 947         iwl_mvm_dump_nic_error_log(mvm);
 948
 949         iwl_mvm_nic_restart(mvm, true);
 950 }
 951
 952 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 953 {
 954         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 955
 956         WARN_ON(1);
 957         iwl_mvm_nic_restart(mvm, true);
 958 }
 959
 960 struct iwl_d0i3_iter_data {
 961         struct iwl_mvm *mvm;
 962         u8 ap_sta_id;
 963         u8 vif_count;
 964         u8 offloading_tid;
 965         bool disable_offloading;
 966 };
 967
 968 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 969                                         struct ieee80211_vif *vif,
 970                                         struct iwl_d0i3_iter_data *iter_data)
 971 {
 972         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 973         struct ieee80211_sta *ap_sta;
 974         struct iwl_mvm_sta *mvmsta;
 975         u32 available_tids = 0;
 976         u8 tid;
 977
 978         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 979                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 980                 return false;
 981
 982         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 983         if (IS_ERR_OR_NULL(ap_sta))
 984                 return false;
 985
 986         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 987         spin_lock_bh(&mvmsta->lock);
 988         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 989                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 990
 991                 /*
 992                  * in case of pending tx packets, don't use this tid
 993                  * for offloading in order to prevent reuse of the same
 994                  * qos seq counters.
 995                  */
 996                 if (iwl_mvm_tid_queued(tid_data))
 997                         continue;
 998
 999                 if (tid_data->state != IWL_AGG_OFF)
1000                         continue;
1001
1002                 available_tids |= BIT(tid);
1003         }
1004         spin_unlock_bh(&mvmsta->lock);
1005
1006         /*
1007          * disallow protocol offloading if we have no available tid
1008          * (with no pending frames and no active aggregation,
1009          * as we don't handle "holes" properly - the scheduler needs the
1010          * frame's seq number and TFD index to match)
1011          */
1012         if (!available_tids)
1013                 return true;
1014
1015         /* for simplicity, just use the first available tid */
1016         iter_data->offloading_tid = ffs(available_tids) - 1;
1017         return false;
1018 }
1019
1020 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1021                                         struct ieee80211_vif *vif)
1022 {
1023         struct iwl_d0i3_iter_data *data = _data;
1024         struct iwl_mvm *mvm = data->mvm;
1025         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1026         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1027
1028         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1029         if (vif->type != NL80211_IFTYPE_STATION ||
1030             !vif->bss_conf.assoc)
1031                 return;
1032
1033         /*
1034          * in case of pending tx packets or active aggregations,
1035          * avoid offloading features in order to prevent reuse of
1036          * the same qos seq counters.
1037          */
1038         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1039                 data->disable_offloading = true;
1040
1041         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1042         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1043
1044         /*
1045          * on init/association, mvm already configures POWER_TABLE_CMD
1046          * and REPLY_MCAST_FILTER_CMD, so currently don't
1047          * reconfigure them (we might want to use different
1048          * params later on, though).
1049          */
1050         data->ap_sta_id = mvmvif->ap_sta_id;
1051         data->vif_count++;
1052 }
1053
1054 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1055                                     struct iwl_wowlan_config_cmd *cmd,
1056                                     struct iwl_d0i3_iter_data *iter_data)
1057 {
1058         struct ieee80211_sta *ap_sta;
1059         struct iwl_mvm_sta *mvm_ap_sta;
1060
1061         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1062                 return;
1063
1064         rcu_read_lock();
1065
1066         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1067         if (IS_ERR_OR_NULL(ap_sta))
1068                 goto out;
1069
1070         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1071         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1072         cmd->offloading_tid = iter_data->offloading_tid;
1073
1074         /*
1075          * The d0i3 uCode takes care of the nonqos counters,
1076          * so configure only the qos seq ones.
1077          */
1078         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1079 out:
1080         rcu_read_unlock();
1081 }
1082
1083 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1084 {
1085         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1086         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1087         int ret;
1088         struct iwl_d0i3_iter_data d0i3_iter_data = {
1089                 .mvm = mvm,
1090         };
1091         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1092                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1093                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1094                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1095                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1096         };
1097         struct iwl_d3_manager_config d3_cfg_cmd = {
1098                 .min_sleep_time = cpu_to_le32(1000),
1099                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1100         };
1101
1102         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1103
1104         /* make sure we have no running tx while configuring the qos */
1105         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1106         synchronize_net();
1107
1108         /*
1109          * iwl_mvm_ref_sync takes a reference before checking the flag.
1110          * so by checking there is no held reference we prevent a state
1111          * in which iwl_mvm_ref_sync continues successfully while we
1112          * configure the firmware to enter d0i3
1113          */
1114         if (iwl_mvm_ref_taken(mvm)) {
1115                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1116                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1117                 wake_up(&mvm->d0i3_exit_waitq);
1118                 return 1;
1119         }
1120
1121         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1122                                                    IEEE80211_IFACE_ITER_NORMAL,
1123                                                    iwl_mvm_enter_d0i3_iterator,
1124                                                    &d0i3_iter_data);
1125         if (d0i3_iter_data.vif_count == 1) {
1126                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1127                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1128         } else {
1129                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1130                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1131                 mvm->d0i3_offloading = false;
1132         }
1133
1134         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1135         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1136                                    sizeof(wowlan_config_cmd),
1137                                    &wowlan_config_cmd);
1138         if (ret)
1139                 return ret;
1140
1141         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1142                                     flags | CMD_MAKE_TRANS_IDLE,
1143                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1144 }
1145
1146 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1147                                        struct ieee80211_vif *vif)
1148 {
1149         struct iwl_mvm *mvm = _data;
1150         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1151
1152         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1153         if (vif->type != NL80211_IFTYPE_STATION ||
1154             !vif->bss_conf.assoc)
1155                 return;
1156
1157         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1158 }
1159
1160 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1161                                          struct ieee80211_vif *vif)
1162 {
1163         struct iwl_mvm *mvm = data;
1164         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1165
1166         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1167             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1168                 iwl_mvm_connection_loss(mvm, vif, "D0i3");
1169 }
1170
1171 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1172 {
1173         struct ieee80211_sta *sta = NULL;
1174         struct iwl_mvm_sta *mvm_ap_sta;
1175         int i;
1176         bool wake_queues = false;
1177
1178         lockdep_assert_held(&mvm->mutex);
1179
1180         spin_lock_bh(&mvm->d0i3_tx_lock);
1181
1182         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1183                 goto out;
1184
1185         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1186
1187         /* get the sta in order to update seq numbers and re-enqueue skbs */
1188         sta = rcu_dereference_protected(
1189                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1190                         lockdep_is_held(&mvm->mutex));
1191
1192         if (IS_ERR_OR_NULL(sta)) {
1193                 sta = NULL;
1194                 goto out;
1195         }
1196
1197         if (mvm->d0i3_offloading && qos_seq) {
1198                 /* update qos seq numbers if offloading was enabled */
1199                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1200                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1201                         u16 seq = le16_to_cpu(qos_seq[i]);
1202                         /* firmware stores last-used one, we store next one */
1203                         seq += 0x10;
1204                         mvm_ap_sta->tid_data[i].seq_number = seq;
1205                 }
1206         }
1207 out:
1208         /* re-enqueue (or drop) all packets */
1209         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1210                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1211
1212                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1213                         ieee80211_free_txskb(mvm->hw, skb);
1214
1215                 /* if the skb_queue is not empty, we need to wake queues */
1216                 wake_queues = true;
1217         }
1218         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1219         wake_up(&mvm->d0i3_exit_waitq);
1220         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1221         if (wake_queues)
1222                 ieee80211_wake_queues(mvm->hw);
1223
1224         spin_unlock_bh(&mvm->d0i3_tx_lock);
1225 }
1226
1227 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1228 {
1229         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1230         struct iwl_host_cmd get_status_cmd = {
1231                 .id = WOWLAN_GET_STATUSES,
1232                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1233         };
1234         struct iwl_wowlan_status *status;
1235         int ret;
1236         u32 disconnection_reasons, wakeup_reasons;
1237         __le16 *qos_seq = NULL;
1238
1239         mutex_lock(&mvm->mutex);
1240         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1241         if (ret)
1242                 goto out;
1243
1244         if (!get_status_cmd.resp_pkt)
1245                 goto out;
1246
1247         status = (void *)get_status_cmd.resp_pkt->data;
1248         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1249         qos_seq = status->qos_seq_ctr;
1250
1251         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1252
1253         disconnection_reasons =
1254                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1255                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1256         if (wakeup_reasons & disconnection_reasons)
1257                 ieee80211_iterate_active_interfaces(
1258                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1259                         iwl_mvm_d0i3_disconnect_iter, mvm);
1260 out:
1261         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1262
1263         /* qos_seq might point inside resp_pkt, so free it only now */
1264         if (get_status_cmd.resp_pkt)
1265                 iwl_free_resp(&get_status_cmd);
1266
1267         /* the FW might have updated the regdomain */
1268         iwl_mvm_update_changed_regdom(mvm);
1269
1270         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1271         mutex_unlock(&mvm->mutex);
1272 }
1273
1274 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1275 {
1276         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1277                     CMD_WAKE_UP_TRANS;
1278         int ret;
1279
1280         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1281
1282         mutex_lock(&mvm->d0i3_suspend_mutex);
1283         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1284                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1285                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1286                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1287                 return 0;
1288         }
1289         mutex_unlock(&mvm->d0i3_suspend_mutex);
1290
1291         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1292         if (ret)
1293                 goto out;
1294
1295         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1296                                                    IEEE80211_IFACE_ITER_NORMAL,
1297                                                    iwl_mvm_exit_d0i3_iterator,
1298                                                    mvm);
1299 out:
1300         schedule_work(&mvm->d0i3_exit_work);
1301         return ret;
1302 }
1303
1304 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1305 {
1306         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1307
1308         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1309         return _iwl_mvm_exit_d0i3(mvm);
1310 }
1311
1312 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1313                              struct napi_struct *napi,
1314                              struct net_device *napi_dev,
1315                              int (*poll)(struct napi_struct *, int),
1316                              int weight)
1317 {
1318         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1319
1320         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1321 }
1322
1323 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1324         .start = iwl_op_mode_mvm_start,
1325         .stop = iwl_op_mode_mvm_stop,
1326         .rx = iwl_mvm_rx_dispatch,
1327         .queue_full = iwl_mvm_stop_sw_queue,
1328         .queue_not_full = iwl_mvm_wake_sw_queue,
1329         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1330         .free_skb = iwl_mvm_free_skb,
1331         .nic_error = iwl_mvm_nic_error,
1332         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1333         .nic_config = iwl_mvm_nic_config,
1334         .enter_d0i3 = iwl_mvm_enter_d0i3,
1335         .exit_d0i3 = iwl_mvm_exit_d0i3,
1336         .napi_add = iwl_mvm_napi_add,
1337 };