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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
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  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
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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 - 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,
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  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(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 250         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 251
 252         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 253                    false),
 254
 255         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 256         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 257                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 258         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 259
 260         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 261                    true),
 262         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 263
 264 };
 265 #undef RX_HANDLER
 266 #define CMD(x) [x] = #x
 267
 268 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 269         CMD(MVM_ALIVE),
 270         CMD(REPLY_ERROR),
 271         CMD(INIT_COMPLETE_NOTIF),
 272         CMD(PHY_CONTEXT_CMD),
 273         CMD(MGMT_MCAST_KEY),
 274         CMD(TX_CMD),
 275         CMD(TXPATH_FLUSH),
 276         CMD(SHARED_MEM_CFG),
 277         CMD(MAC_CONTEXT_CMD),
 278         CMD(TIME_EVENT_CMD),
 279         CMD(TIME_EVENT_NOTIFICATION),
 280         CMD(BINDING_CONTEXT_CMD),
 281         CMD(TIME_QUOTA_CMD),
 282         CMD(NON_QOS_TX_COUNTER_CMD),
 283         CMD(RADIO_VERSION_NOTIFICATION),
 284         CMD(SCAN_REQUEST_CMD),
 285         CMD(SCAN_ABORT_CMD),
 286         CMD(SCAN_START_NOTIFICATION),
 287         CMD(SCAN_RESULTS_NOTIFICATION),
 288         CMD(SCAN_COMPLETE_NOTIFICATION),
 289         CMD(NVM_ACCESS_CMD),
 290         CMD(PHY_CONFIGURATION_CMD),
 291         CMD(CALIB_RES_NOTIF_PHY_DB),
 292         CMD(SET_CALIB_DEFAULT_CMD),
 293         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 294         CMD(ADD_STA_KEY),
 295         CMD(ADD_STA),
 296         CMD(REMOVE_STA),
 297         CMD(LQ_CMD),
 298         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 299         CMD(MATCH_FOUND_NOTIFICATION),
 300         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 301         CMD(SCAN_OFFLOAD_ABORT_CMD),
 302         CMD(HOT_SPOT_CMD),
 303         CMD(SCAN_OFFLOAD_COMPLETE),
 304         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 305         CMD(SCAN_ITERATION_COMPLETE),
 306         CMD(POWER_TABLE_CMD),
 307         CMD(WEP_KEY),
 308         CMD(REPLY_RX_PHY_CMD),
 309         CMD(REPLY_RX_MPDU_CMD),
 310         CMD(BEACON_NOTIFICATION),
 311         CMD(BEACON_TEMPLATE_CMD),
 312         CMD(STATISTICS_CMD),
 313         CMD(STATISTICS_NOTIFICATION),
 314         CMD(EOSP_NOTIFICATION),
 315         CMD(REDUCE_TX_POWER_CMD),
 316         CMD(TX_ANT_CONFIGURATION_CMD),
 317         CMD(D3_CONFIG_CMD),
 318         CMD(D0I3_END_CMD),
 319         CMD(PROT_OFFLOAD_CONFIG_CMD),
 320         CMD(OFFLOADS_QUERY_CMD),
 321         CMD(REMOTE_WAKE_CONFIG_CMD),
 322         CMD(WOWLAN_PATTERNS),
 323         CMD(WOWLAN_CONFIGURATION),
 324         CMD(WOWLAN_TSC_RSC_PARAM),
 325         CMD(WOWLAN_TKIP_PARAM),
 326         CMD(WOWLAN_KEK_KCK_MATERIAL),
 327         CMD(WOWLAN_GET_STATUSES),
 328         CMD(WOWLAN_TX_POWER_PER_DB),
 329         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 330         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 331         CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
 332         CMD(CARD_STATE_NOTIFICATION),
 333         CMD(MISSED_BEACONS_NOTIFICATION),
 334         CMD(BT_COEX_PRIO_TABLE),
 335         CMD(BT_COEX_PROT_ENV),
 336         CMD(BT_PROFILE_NOTIFICATION),
 337         CMD(BT_CONFIG),
 338         CMD(MCAST_FILTER_CMD),
 339         CMD(BCAST_FILTER_CMD),
 340         CMD(REPLY_SF_CFG_CMD),
 341         CMD(REPLY_BEACON_FILTERING_CMD),
 342         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 343         CMD(DTS_MEASUREMENT_NOTIFICATION),
 344         CMD(REPLY_THERMAL_MNG_BACKOFF),
 345         CMD(MAC_PM_POWER_TABLE),
 346         CMD(LTR_CONFIG),
 347         CMD(BT_COEX_CI),
 348         CMD(BT_COEX_UPDATE_SW_BOOST),
 349         CMD(BT_COEX_UPDATE_CORUN_LUT),
 350         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 351         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 352         CMD(ANTENNA_COUPLING_NOTIFICATION),
 353         CMD(SCD_QUEUE_CFG),
 354         CMD(SCAN_CFG_CMD),
 355         CMD(SCAN_REQ_UMAC),
 356         CMD(SCAN_ABORT_UMAC),
 357         CMD(SCAN_COMPLETE_UMAC),
 358         CMD(TDLS_CHANNEL_SWITCH_CMD),
 359         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 360         CMD(TDLS_CONFIG_CMD),
 361         CMD(MCC_UPDATE_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_DELAYED_WORK(&mvm->fw_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         trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
 508
 509         /* set up notification wait support */
 510         iwl_notification_wait_init(&mvm->notif_wait);
 511
 512         /* Init phy db */
 513         mvm->phy_db = iwl_phy_db_init(trans);
 514         if (!mvm->phy_db) {
 515                 IWL_ERR(mvm, "Cannot init phy_db\n");
 516                 goto out_free;
 517         }
 518
 519         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 520                  mvm->cfg->name, mvm->trans->hw_rev);
 521
 522         min_backoff = calc_min_backoff(trans, cfg);
 523         iwl_mvm_tt_initialize(mvm, min_backoff);
 524         /* set the nvm_file_name according to priority */
 525         if (iwlwifi_mod_params.nvm_file) {
 526                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 527         } else {
 528                 if ((trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) &&
 529                     (CSR_HW_REV_STEP(trans->hw_rev) == SILICON_A_STEP))
 530                         mvm->nvm_file_name = mvm->cfg->default_nvm_file_8000A;
 531                 else
 532                         mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 533         }
 534
 535         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 536                  "not allowing power-up and not having nvm_file\n"))
 537                 goto out_free;
 538
 539         /*
 540          * Even if nvm exists in the nvm_file driver should read again the nvm
 541          * from the nic because there might be entries that exist in the OTP
 542          * and not in the file.
 543          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 544          */
 545         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 546                 err = iwl_nvm_init(mvm, false);
 547                 if (err)
 548                         goto out_free;
 549         } else {
 550                 err = iwl_trans_start_hw(mvm->trans);
 551                 if (err)
 552                         goto out_free;
 553
 554                 mutex_lock(&mvm->mutex);
 555                 err = iwl_run_init_mvm_ucode(mvm, true);
 556                 if (!err || !iwlmvm_mod_params.init_dbg)
 557                         iwl_trans_stop_device(trans);
 558                 mutex_unlock(&mvm->mutex);
 559                 /* returns 0 if successful, 1 if success but in rfkill */
 560                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 561                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 562                         goto out_free;
 563                 }
 564         }
 565
 566         scan_size = iwl_mvm_scan_size(mvm);
 567
 568         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 569         if (!mvm->scan_cmd)
 570                 goto out_free;
 571
 572         /* Set EBS as successful as long as not stated otherwise by the FW. */
 573         mvm->last_ebs_successful = true;
 574
 575         err = iwl_mvm_mac_setup_register(mvm);
 576         if (err)
 577                 goto out_free;
 578
 579         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 580         if (err)
 581                 goto out_unregister;
 582
 583         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 584
 585         /* rpm starts with a taken ref. only set the appropriate bit here. */
 586         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 587
 588         return op_mode;
 589
 590  out_unregister:
 591         ieee80211_unregister_hw(mvm->hw);
 592         iwl_mvm_leds_exit(mvm);
 593  out_free:
 594         iwl_phy_db_free(mvm->phy_db);
 595         kfree(mvm->scan_cmd);
 596         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 597                 iwl_trans_op_mode_leave(trans);
 598         ieee80211_free_hw(mvm->hw);
 599         return NULL;
 600 }
 601
 602 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 603 {
 604         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 605         int i;
 606
 607         iwl_mvm_leds_exit(mvm);
 608
 609         iwl_mvm_tt_exit(mvm);
 610
 611         ieee80211_unregister_hw(mvm->hw);
 612
 613         kfree(mvm->scan_cmd);
 614         kfree(mvm->mcast_filter_cmd);
 615         mvm->mcast_filter_cmd = NULL;
 616
 617 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 618         kfree(mvm->d3_resume_sram);
 619         if (mvm->nd_config) {
 620                 kfree(mvm->nd_config->match_sets);
 621                 kfree(mvm->nd_config);
 622                 mvm->nd_config = NULL;
 623         }
 624 #endif
 625
 626         iwl_trans_op_mode_leave(mvm->trans);
 627
 628         iwl_phy_db_free(mvm->phy_db);
 629         mvm->phy_db = NULL;
 630
 631         iwl_free_nvm_data(mvm->nvm_data);
 632         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 633                 kfree(mvm->nvm_sections[i].data);
 634
 635         ieee80211_free_hw(mvm->hw);
 636 }
 637
 638 struct iwl_async_handler_entry {
 639         struct list_head list;
 640         struct iwl_rx_cmd_buffer rxb;
 641         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 642                   struct iwl_device_cmd *cmd);
 643 };
 644
 645 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 646 {
 647         struct iwl_async_handler_entry *entry, *tmp;
 648
 649         spin_lock_bh(&mvm->async_handlers_lock);
 650         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 651                 iwl_free_rxb(&entry->rxb);
 652                 list_del(&entry->list);
 653                 kfree(entry);
 654         }
 655         spin_unlock_bh(&mvm->async_handlers_lock);
 656 }
 657
 658 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 659 {
 660         struct iwl_mvm *mvm =
 661                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 662         struct iwl_async_handler_entry *entry, *tmp;
 663         struct list_head local_list;
 664
 665         INIT_LIST_HEAD(&local_list);
 666
 667         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 668         mutex_lock(&mvm->mutex);
 669
 670         /*
 671          * Sync with Rx path with a lock. Remove all the entries from this list,
 672          * add them to a local one (lock free), and then handle them.
 673          */
 674         spin_lock_bh(&mvm->async_handlers_lock);
 675         list_splice_init(&mvm->async_handlers_list, &local_list);
 676         spin_unlock_bh(&mvm->async_handlers_lock);
 677
 678         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 679                 if (entry->fn(mvm, &entry->rxb, NULL))
 680                         IWL_WARN(mvm,
 681                                  "returned value from ASYNC handlers are ignored\n");
 682                 iwl_free_rxb(&entry->rxb);
 683                 list_del(&entry->list);
 684                 kfree(entry);
 685         }
 686         mutex_unlock(&mvm->mutex);
 687 }
 688
 689 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
 690                                             struct iwl_rx_packet *pkt)
 691 {
 692         struct iwl_fw_dbg_trigger_tlv *trig;
 693         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
 694         char buf[32];
 695         int i;
 696
 697         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
 698                 return;
 699
 700         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
 701         cmds_trig = (void *)trig->data;
 702
 703         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 704                 return;
 705
 706         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
 707                 /* don't collect on CMD 0 */
 708                 if (!cmds_trig->cmds[i].cmd_id)
 709                         break;
 710
 711                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd)
 712                         continue;
 713
 714                 memset(buf, 0, sizeof(buf));
 715                 snprintf(buf, sizeof(buf), "CMD 0x%02x received", pkt->hdr.cmd);
 716                 iwl_mvm_fw_dbg_collect_trig(mvm, trig, buf, sizeof(buf));
 717                 break;
 718         }
 719 }
 720
 721 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 722                                struct iwl_rx_cmd_buffer *rxb,
 723                                struct iwl_device_cmd *cmd)
 724 {
 725         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 726         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 727         u8 i;
 728
 729         iwl_mvm_rx_check_trigger(mvm, pkt);
 730
 731         /*
 732          * Do the notification wait before RX handlers so
 733          * even if the RX handler consumes the RXB we have
 734          * access to it in the notification wait entry.
 735          */
 736         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 737
 738         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 739                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 740                 struct iwl_async_handler_entry *entry;
 741
 742                 if (rx_h->cmd_id != pkt->hdr.cmd)
 743                         continue;
 744
 745                 if (!rx_h->async)
 746                         return rx_h->fn(mvm, rxb, cmd);
 747
 748                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 749                 /* we can't do much... */
 750                 if (!entry)
 751                         return 0;
 752
 753                 entry->rxb._page = rxb_steal_page(rxb);
 754                 entry->rxb._offset = rxb->_offset;
 755                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 756                 entry->fn = rx_h->fn;
 757                 spin_lock(&mvm->async_handlers_lock);
 758                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 759                 spin_unlock(&mvm->async_handlers_lock);
 760                 schedule_work(&mvm->async_handlers_wk);
 761                 break;
 762         }
 763
 764         return 0;
 765 }
 766
 767 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 768 {
 769         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 770         int mq = mvm->queue_to_mac80211[queue];
 771
 772         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 773                 return;
 774
 775         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 776                 IWL_DEBUG_TX_QUEUES(mvm,
 777                                     "queue %d (mac80211 %d) already stopped\n",
 778                                     queue, mq);
 779                 return;
 780         }
 781
 782         ieee80211_stop_queue(mvm->hw, mq);
 783 }
 784
 785 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 786 {
 787         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 788         int mq = mvm->queue_to_mac80211[queue];
 789
 790         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 791                 return;
 792
 793         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 794                 IWL_DEBUG_TX_QUEUES(mvm,
 795                                     "queue %d (mac80211 %d) still stopped\n",
 796                                     queue, mq);
 797                 return;
 798         }
 799
 800         ieee80211_wake_queue(mvm->hw, mq);
 801 }
 802
 803 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 804 {
 805         if (state)
 806                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 807         else
 808                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 809
 810         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 811 }
 812
 813 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 814 {
 815         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 816         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 817
 818         if (state)
 819                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 820         else
 821                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 822
 823         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 824
 825         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 826         if (calibrating)
 827                 iwl_abort_notification_waits(&mvm->notif_wait);
 828
 829         /*
 830          * Stop the device if we run OPERATIONAL firmware or if we are in the
 831          * middle of the calibrations.
 832          */
 833         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 834 }
 835
 836 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 837 {
 838         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 839         struct ieee80211_tx_info *info;
 840
 841         info = IEEE80211_SKB_CB(skb);
 842         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 843         ieee80211_free_txskb(mvm->hw, skb);
 844 }
 845
 846 struct iwl_mvm_reprobe {
 847         struct device *dev;
 848         struct work_struct work;
 849 };
 850
 851 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 852 {
 853         struct iwl_mvm_reprobe *reprobe;
 854
 855         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 856         if (device_reprobe(reprobe->dev))
 857                 dev_err(reprobe->dev, "reprobe failed!\n");
 858         kfree(reprobe);
 859         module_put(THIS_MODULE);
 860 }
 861
 862 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 863 {
 864         struct iwl_mvm *mvm =
 865                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 866
 867         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 868                 return;
 869
 870         mutex_lock(&mvm->mutex);
 871         iwl_mvm_fw_error_dump(mvm);
 872
 873         /* start recording again if the firmware is not crashed */
 874         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 875                      mvm->fw->dbg_dest_tlv &&
 876                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 877
 878         mutex_unlock(&mvm->mutex);
 879
 880         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 881 }
 882
 883 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 884 {
 885         iwl_abort_notification_waits(&mvm->notif_wait);
 886
 887         /*
 888          * This is a bit racy, but worst case we tell mac80211 about
 889          * a stopped/aborted scan when that was already done which
 890          * is not a problem. It is necessary to abort any os scan
 891          * here because mac80211 requires having the scan cleared
 892          * before restarting.
 893          * We'll reset the scan_status to NONE in restart cleanup in
 894          * the next start() call from mac80211. If restart isn't called
 895          * (no fw restart) scan status will stay busy.
 896          */
 897         switch (mvm->scan_status) {
 898         case IWL_MVM_SCAN_NONE:
 899                 break;
 900         case IWL_MVM_SCAN_OS:
 901                 ieee80211_scan_completed(mvm->hw, true);
 902                 break;
 903         case IWL_MVM_SCAN_SCHED:
 904                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 905                 if (!mvm->restart_fw)
 906                         ieee80211_sched_scan_stopped(mvm->hw);
 907                 break;
 908         }
 909
 910         /*
 911          * If we're restarting already, don't cycle restarts.
 912          * If INIT fw asserted, it will likely fail again.
 913          * If WoWLAN fw asserted, don't restart either, mac80211
 914          * can't recover this since we're already half suspended.
 915          */
 916         if (!mvm->restart_fw && fw_error) {
 917                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
 918         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 919                                     &mvm->status)) {
 920                 struct iwl_mvm_reprobe *reprobe;
 921
 922                 IWL_ERR(mvm,
 923                         "Firmware error during reconfiguration - reprobe!\n");
 924
 925                 /*
 926                  * get a module reference to avoid doing this while unloading
 927                  * anyway and to avoid scheduling a work with code that's
 928                  * being removed.
 929                  */
 930                 if (!try_module_get(THIS_MODULE)) {
 931                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 932                         return;
 933                 }
 934
 935                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 936                 if (!reprobe) {
 937                         module_put(THIS_MODULE);
 938                         return;
 939                 }
 940                 reprobe->dev = mvm->trans->dev;
 941                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 942                 schedule_work(&reprobe->work);
 943         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 944                 /* don't let the transport/FW power down */
 945                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 946
 947                 if (fw_error && mvm->restart_fw > 0)
 948                         mvm->restart_fw--;
 949                 ieee80211_restart_hw(mvm->hw);
 950         }
 951 }
 952
 953 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 954 {
 955         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 956
 957         iwl_mvm_dump_nic_error_log(mvm);
 958
 959         iwl_mvm_nic_restart(mvm, true);
 960 }
 961
 962 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 963 {
 964         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 965
 966         WARN_ON(1);
 967         iwl_mvm_nic_restart(mvm, true);
 968 }
 969
 970 struct iwl_d0i3_iter_data {
 971         struct iwl_mvm *mvm;
 972         u8 ap_sta_id;
 973         u8 vif_count;
 974         u8 offloading_tid;
 975         bool disable_offloading;
 976 };
 977
 978 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 979                                         struct ieee80211_vif *vif,
 980                                         struct iwl_d0i3_iter_data *iter_data)
 981 {
 982         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 983         struct ieee80211_sta *ap_sta;
 984         struct iwl_mvm_sta *mvmsta;
 985         u32 available_tids = 0;
 986         u8 tid;
 987
 988         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 989                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 990                 return false;
 991
 992         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 993         if (IS_ERR_OR_NULL(ap_sta))
 994                 return false;
 995
 996         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 997         spin_lock_bh(&mvmsta->lock);
 998         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 999                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1000
1001                 /*
1002                  * in case of pending tx packets, don't use this tid
1003                  * for offloading in order to prevent reuse of the same
1004                  * qos seq counters.
1005                  */
1006                 if (iwl_mvm_tid_queued(tid_data))
1007                         continue;
1008
1009                 if (tid_data->state != IWL_AGG_OFF)
1010                         continue;
1011
1012                 available_tids |= BIT(tid);
1013         }
1014         spin_unlock_bh(&mvmsta->lock);
1015
1016         /*
1017          * disallow protocol offloading if we have no available tid
1018          * (with no pending frames and no active aggregation,
1019          * as we don't handle "holes" properly - the scheduler needs the
1020          * frame's seq number and TFD index to match)
1021          */
1022         if (!available_tids)
1023                 return true;
1024
1025         /* for simplicity, just use the first available tid */
1026         iter_data->offloading_tid = ffs(available_tids) - 1;
1027         return false;
1028 }
1029
1030 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1031                                         struct ieee80211_vif *vif)
1032 {
1033         struct iwl_d0i3_iter_data *data = _data;
1034         struct iwl_mvm *mvm = data->mvm;
1035         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1036         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1037
1038         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1039         if (vif->type != NL80211_IFTYPE_STATION ||
1040             !vif->bss_conf.assoc)
1041                 return;
1042
1043         /*
1044          * in case of pending tx packets or active aggregations,
1045          * avoid offloading features in order to prevent reuse of
1046          * the same qos seq counters.
1047          */
1048         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1049                 data->disable_offloading = true;
1050
1051         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1052         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1053
1054         /*
1055          * on init/association, mvm already configures POWER_TABLE_CMD
1056          * and REPLY_MCAST_FILTER_CMD, so currently don't
1057          * reconfigure them (we might want to use different
1058          * params later on, though).
1059          */
1060         data->ap_sta_id = mvmvif->ap_sta_id;
1061         data->vif_count++;
1062 }
1063
1064 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1065                                     struct iwl_wowlan_config_cmd *cmd,
1066                                     struct iwl_d0i3_iter_data *iter_data)
1067 {
1068         struct ieee80211_sta *ap_sta;
1069         struct iwl_mvm_sta *mvm_ap_sta;
1070
1071         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1072                 return;
1073
1074         rcu_read_lock();
1075
1076         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1077         if (IS_ERR_OR_NULL(ap_sta))
1078                 goto out;
1079
1080         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1081         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1082         cmd->offloading_tid = iter_data->offloading_tid;
1083
1084         /*
1085          * The d0i3 uCode takes care of the nonqos counters,
1086          * so configure only the qos seq ones.
1087          */
1088         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1089 out:
1090         rcu_read_unlock();
1091 }
1092
1093 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1094 {
1095         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1096         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1097         int ret;
1098         struct iwl_d0i3_iter_data d0i3_iter_data = {
1099                 .mvm = mvm,
1100         };
1101         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1102                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1103                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1104                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1105                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1106         };
1107         struct iwl_d3_manager_config d3_cfg_cmd = {
1108                 .min_sleep_time = cpu_to_le32(1000),
1109                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1110         };
1111
1112         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1113
1114         /* make sure we have no running tx while configuring the qos */
1115         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1116         synchronize_net();
1117
1118         /*
1119          * iwl_mvm_ref_sync takes a reference before checking the flag.
1120          * so by checking there is no held reference we prevent a state
1121          * in which iwl_mvm_ref_sync continues successfully while we
1122          * configure the firmware to enter d0i3
1123          */
1124         if (iwl_mvm_ref_taken(mvm)) {
1125                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1126                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1127                 wake_up(&mvm->d0i3_exit_waitq);
1128                 return 1;
1129         }
1130
1131         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1132                                                    IEEE80211_IFACE_ITER_NORMAL,
1133                                                    iwl_mvm_enter_d0i3_iterator,
1134                                                    &d0i3_iter_data);
1135         if (d0i3_iter_data.vif_count == 1) {
1136                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1137                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1138         } else {
1139                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1140                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1141                 mvm->d0i3_offloading = false;
1142         }
1143
1144         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1145         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1146                                    sizeof(wowlan_config_cmd),
1147                                    &wowlan_config_cmd);
1148         if (ret)
1149                 return ret;
1150
1151         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1152                                     flags | CMD_MAKE_TRANS_IDLE,
1153                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1154 }
1155
1156 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1157                                        struct ieee80211_vif *vif)
1158 {
1159         struct iwl_mvm *mvm = _data;
1160         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1161
1162         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1163         if (vif->type != NL80211_IFTYPE_STATION ||
1164             !vif->bss_conf.assoc)
1165                 return;
1166
1167         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1168 }
1169
1170 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1171                                          struct ieee80211_vif *vif)
1172 {
1173         struct iwl_mvm *mvm = data;
1174         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1175
1176         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1177             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1178                 ieee80211_connection_loss(vif);
1179 }
1180
1181 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1182 {
1183         struct ieee80211_sta *sta = NULL;
1184         struct iwl_mvm_sta *mvm_ap_sta;
1185         int i;
1186         bool wake_queues = false;
1187
1188         lockdep_assert_held(&mvm->mutex);
1189
1190         spin_lock_bh(&mvm->d0i3_tx_lock);
1191
1192         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1193                 goto out;
1194
1195         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1196
1197         /* get the sta in order to update seq numbers and re-enqueue skbs */
1198         sta = rcu_dereference_protected(
1199                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1200                         lockdep_is_held(&mvm->mutex));
1201
1202         if (IS_ERR_OR_NULL(sta)) {
1203                 sta = NULL;
1204                 goto out;
1205         }
1206
1207         if (mvm->d0i3_offloading && qos_seq) {
1208                 /* update qos seq numbers if offloading was enabled */
1209                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1210                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1211                         u16 seq = le16_to_cpu(qos_seq[i]);
1212                         /* firmware stores last-used one, we store next one */
1213                         seq += 0x10;
1214                         mvm_ap_sta->tid_data[i].seq_number = seq;
1215                 }
1216         }
1217 out:
1218         /* re-enqueue (or drop) all packets */
1219         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1220                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1221
1222                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1223                         ieee80211_free_txskb(mvm->hw, skb);
1224
1225                 /* if the skb_queue is not empty, we need to wake queues */
1226                 wake_queues = true;
1227         }
1228         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1229         wake_up(&mvm->d0i3_exit_waitq);
1230         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1231         if (wake_queues)
1232                 ieee80211_wake_queues(mvm->hw);
1233
1234         spin_unlock_bh(&mvm->d0i3_tx_lock);
1235 }
1236
1237 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1238 {
1239         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1240         struct iwl_host_cmd get_status_cmd = {
1241                 .id = WOWLAN_GET_STATUSES,
1242                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1243         };
1244         struct iwl_wowlan_status *status;
1245         int ret;
1246         u32 disconnection_reasons, wakeup_reasons;
1247         __le16 *qos_seq = NULL;
1248
1249         mutex_lock(&mvm->mutex);
1250         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1251         if (ret)
1252                 goto out;
1253
1254         if (!get_status_cmd.resp_pkt)
1255                 goto out;
1256
1257         status = (void *)get_status_cmd.resp_pkt->data;
1258         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1259         qos_seq = status->qos_seq_ctr;
1260
1261         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1262
1263         disconnection_reasons =
1264                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1265                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1266         if (wakeup_reasons & disconnection_reasons)
1267                 ieee80211_iterate_active_interfaces(
1268                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1269                         iwl_mvm_d0i3_disconnect_iter, mvm);
1270
1271         iwl_free_resp(&get_status_cmd);
1272 out:
1273         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1274
1275         /* the FW might have updated the regdomain */
1276         iwl_mvm_update_changed_regdom(mvm);
1277
1278         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1279         mutex_unlock(&mvm->mutex);
1280 }
1281
1282 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1283 {
1284         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1285                     CMD_WAKE_UP_TRANS;
1286         int ret;
1287
1288         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1289
1290         mutex_lock(&mvm->d0i3_suspend_mutex);
1291         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1292                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1293                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1294                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1295                 return 0;
1296         }
1297         mutex_unlock(&mvm->d0i3_suspend_mutex);
1298
1299         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1300         if (ret)
1301                 goto out;
1302
1303         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1304                                                    IEEE80211_IFACE_ITER_NORMAL,
1305                                                    iwl_mvm_exit_d0i3_iterator,
1306                                                    mvm);
1307 out:
1308         schedule_work(&mvm->d0i3_exit_work);
1309         return ret;
1310 }
1311
1312 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1313 {
1314         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1315
1316         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1317         return _iwl_mvm_exit_d0i3(mvm);
1318 }
1319
1320 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1321                              struct napi_struct *napi,
1322                              struct net_device *napi_dev,
1323                              int (*poll)(struct napi_struct *, int),
1324                              int weight)
1325 {
1326         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1327
1328         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1329 }
1330
1331 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1332         .start = iwl_op_mode_mvm_start,
1333         .stop = iwl_op_mode_mvm_stop,
1334         .rx = iwl_mvm_rx_dispatch,
1335         .queue_full = iwl_mvm_stop_sw_queue,
1336         .queue_not_full = iwl_mvm_wake_sw_queue,
1337         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1338         .free_skb = iwl_mvm_free_skb,
1339         .nic_error = iwl_mvm_nic_error,
1340         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1341         .nic_config = iwl_mvm_nic_config,
1342         .enter_d0i3 = iwl_mvm_enter_d0i3,
1343         .exit_d0i3 = iwl_mvm_exit_d0i3,
1344         .napi_add = iwl_mvm_napi_add,
1345 };