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                 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
 492
 493         snprintf(mvm->hw->wiphy->fw_version,
 494                  sizeof(mvm->hw->wiphy->fw_version),
 495                  "%s", fw->fw_version);
 496
 497         /* Configure transport layer */
 498         iwl_trans_configure(mvm->trans, &trans_cfg);
 499
 500         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 501         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 502         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 503         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 504         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 505                sizeof(trans->dbg_conf_tlv));
 506         trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
 507
 508         /* set up notification wait support */
 509         iwl_notification_wait_init(&mvm->notif_wait);
 510
 511         /* Init phy db */
 512         mvm->phy_db = iwl_phy_db_init(trans);
 513         if (!mvm->phy_db) {
 514                 IWL_ERR(mvm, "Cannot init phy_db\n");
 515                 goto out_free;
 516         }
 517
 518         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 519                  mvm->cfg->name, mvm->trans->hw_rev);
 520
 521         min_backoff = calc_min_backoff(trans, cfg);
 522         iwl_mvm_tt_initialize(mvm, min_backoff);
 523         /* set the nvm_file_name according to priority */
 524         if (iwlwifi_mod_params.nvm_file)
 525                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 526         else
 527                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 528
 529         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 530                  "not allowing power-up and not having nvm_file\n"))
 531                 goto out_free;
 532
 533         /*
 534          * Even if nvm exists in the nvm_file driver should read again the nvm
 535          * from the nic because there might be entries that exist in the OTP
 536          * and not in the file.
 537          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 538          */
 539         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 540                 err = iwl_nvm_init(mvm, false);
 541                 if (err)
 542                         goto out_free;
 543         } else {
 544                 err = iwl_trans_start_hw(mvm->trans);
 545                 if (err)
 546                         goto out_free;
 547
 548                 mutex_lock(&mvm->mutex);
 549                 err = iwl_run_init_mvm_ucode(mvm, true);
 550                 if (!err || !iwlmvm_mod_params.init_dbg)
 551                         iwl_trans_stop_device(trans);
 552                 mutex_unlock(&mvm->mutex);
 553                 /* returns 0 if successful, 1 if success but in rfkill */
 554                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 555                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 556                         goto out_free;
 557                 }
 558         }
 559
 560         scan_size = iwl_mvm_scan_size(mvm);
 561
 562         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 563         if (!mvm->scan_cmd)
 564                 goto out_free;
 565
 566         /* Set EBS as successful as long as not stated otherwise by the FW. */
 567         mvm->last_ebs_successful = true;
 568
 569         err = iwl_mvm_mac_setup_register(mvm);
 570         if (err)
 571                 goto out_free;
 572
 573         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 574         if (err)
 575                 goto out_unregister;
 576
 577         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 578
 579         /* rpm starts with a taken ref. only set the appropriate bit here. */
 580         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 581
 582         return op_mode;
 583
 584  out_unregister:
 585         ieee80211_unregister_hw(mvm->hw);
 586         iwl_mvm_leds_exit(mvm);
 587  out_free:
 588         iwl_phy_db_free(mvm->phy_db);
 589         kfree(mvm->scan_cmd);
 590         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 591                 iwl_trans_op_mode_leave(trans);
 592         ieee80211_free_hw(mvm->hw);
 593         return NULL;
 594 }
 595
 596 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 597 {
 598         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 599         int i;
 600
 601         iwl_mvm_leds_exit(mvm);
 602
 603         iwl_mvm_tt_exit(mvm);
 604
 605         ieee80211_unregister_hw(mvm->hw);
 606
 607         kfree(mvm->scan_cmd);
 608         kfree(mvm->mcast_filter_cmd);
 609         mvm->mcast_filter_cmd = NULL;
 610
 611 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 612         kfree(mvm->d3_resume_sram);
 613         if (mvm->nd_config) {
 614                 kfree(mvm->nd_config->match_sets);
 615                 kfree(mvm->nd_config);
 616                 mvm->nd_config = NULL;
 617         }
 618 #endif
 619
 620         iwl_trans_op_mode_leave(mvm->trans);
 621
 622         iwl_phy_db_free(mvm->phy_db);
 623         mvm->phy_db = NULL;
 624
 625         iwl_free_nvm_data(mvm->nvm_data);
 626         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 627                 kfree(mvm->nvm_sections[i].data);
 628
 629         ieee80211_free_hw(mvm->hw);
 630 }
 631
 632 struct iwl_async_handler_entry {
 633         struct list_head list;
 634         struct iwl_rx_cmd_buffer rxb;
 635         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 636                   struct iwl_device_cmd *cmd);
 637 };
 638
 639 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 640 {
 641         struct iwl_async_handler_entry *entry, *tmp;
 642
 643         spin_lock_bh(&mvm->async_handlers_lock);
 644         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 645                 iwl_free_rxb(&entry->rxb);
 646                 list_del(&entry->list);
 647                 kfree(entry);
 648         }
 649         spin_unlock_bh(&mvm->async_handlers_lock);
 650 }
 651
 652 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 653 {
 654         struct iwl_mvm *mvm =
 655                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 656         struct iwl_async_handler_entry *entry, *tmp;
 657         struct list_head local_list;
 658
 659         INIT_LIST_HEAD(&local_list);
 660
 661         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 662         mutex_lock(&mvm->mutex);
 663
 664         /*
 665          * Sync with Rx path with a lock. Remove all the entries from this list,
 666          * add them to a local one (lock free), and then handle them.
 667          */
 668         spin_lock_bh(&mvm->async_handlers_lock);
 669         list_splice_init(&mvm->async_handlers_list, &local_list);
 670         spin_unlock_bh(&mvm->async_handlers_lock);
 671
 672         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 673                 if (entry->fn(mvm, &entry->rxb, NULL))
 674                         IWL_WARN(mvm,
 675                                  "returned value from ASYNC handlers are ignored\n");
 676                 iwl_free_rxb(&entry->rxb);
 677                 list_del(&entry->list);
 678                 kfree(entry);
 679         }
 680         mutex_unlock(&mvm->mutex);
 681 }
 682
 683 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
 684                                             struct iwl_rx_packet *pkt)
 685 {
 686         struct iwl_fw_dbg_trigger_tlv *trig;
 687         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
 688         char buf[32];
 689         int i;
 690
 691         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
 692                 return;
 693
 694         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
 695         cmds_trig = (void *)trig->data;
 696
 697         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 698                 return;
 699
 700         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
 701                 /* don't collect on CMD 0 */
 702                 if (!cmds_trig->cmds[i].cmd_id)
 703                         break;
 704
 705                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd)
 706                         continue;
 707
 708                 memset(buf, 0, sizeof(buf));
 709                 snprintf(buf, sizeof(buf), "CMD 0x%02x received", pkt->hdr.cmd);
 710                 iwl_mvm_fw_dbg_collect_trig(mvm, trig, buf, sizeof(buf));
 711                 break;
 712         }
 713 }
 714
 715 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 716                                struct iwl_rx_cmd_buffer *rxb,
 717                                struct iwl_device_cmd *cmd)
 718 {
 719         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 720         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 721         u8 i;
 722
 723         iwl_mvm_rx_check_trigger(mvm, pkt);
 724
 725         /*
 726          * Do the notification wait before RX handlers so
 727          * even if the RX handler consumes the RXB we have
 728          * access to it in the notification wait entry.
 729          */
 730         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 731
 732         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 733                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 734                 struct iwl_async_handler_entry *entry;
 735
 736                 if (rx_h->cmd_id != pkt->hdr.cmd)
 737                         continue;
 738
 739                 if (!rx_h->async)
 740                         return rx_h->fn(mvm, rxb, cmd);
 741
 742                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 743                 /* we can't do much... */
 744                 if (!entry)
 745                         return 0;
 746
 747                 entry->rxb._page = rxb_steal_page(rxb);
 748                 entry->rxb._offset = rxb->_offset;
 749                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 750                 entry->fn = rx_h->fn;
 751                 spin_lock(&mvm->async_handlers_lock);
 752                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 753                 spin_unlock(&mvm->async_handlers_lock);
 754                 schedule_work(&mvm->async_handlers_wk);
 755                 break;
 756         }
 757
 758         return 0;
 759 }
 760
 761 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 762 {
 763         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 764         int mq = mvm->queue_to_mac80211[queue];
 765
 766         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 767                 return;
 768
 769         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 770                 IWL_DEBUG_TX_QUEUES(mvm,
 771                                     "queue %d (mac80211 %d) already stopped\n",
 772                                     queue, mq);
 773                 return;
 774         }
 775
 776         ieee80211_stop_queue(mvm->hw, mq);
 777 }
 778
 779 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 780 {
 781         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 782         int mq = mvm->queue_to_mac80211[queue];
 783
 784         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 785                 return;
 786
 787         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 788                 IWL_DEBUG_TX_QUEUES(mvm,
 789                                     "queue %d (mac80211 %d) still stopped\n",
 790                                     queue, mq);
 791                 return;
 792         }
 793
 794         ieee80211_wake_queue(mvm->hw, mq);
 795 }
 796
 797 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 798 {
 799         if (state)
 800                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 801         else
 802                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 803
 804         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 805 }
 806
 807 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 808 {
 809         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 810         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 811
 812         if (state)
 813                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 814         else
 815                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 816
 817         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 818
 819         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 820         if (calibrating)
 821                 iwl_abort_notification_waits(&mvm->notif_wait);
 822
 823         /*
 824          * Stop the device if we run OPERATIONAL firmware or if we are in the
 825          * middle of the calibrations.
 826          */
 827         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 828 }
 829
 830 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 831 {
 832         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 833         struct ieee80211_tx_info *info;
 834
 835         info = IEEE80211_SKB_CB(skb);
 836         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 837         ieee80211_free_txskb(mvm->hw, skb);
 838 }
 839
 840 struct iwl_mvm_reprobe {
 841         struct device *dev;
 842         struct work_struct work;
 843 };
 844
 845 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 846 {
 847         struct iwl_mvm_reprobe *reprobe;
 848
 849         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 850         if (device_reprobe(reprobe->dev))
 851                 dev_err(reprobe->dev, "reprobe failed!\n");
 852         kfree(reprobe);
 853         module_put(THIS_MODULE);
 854 }
 855
 856 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 857 {
 858         struct iwl_mvm *mvm =
 859                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 860
 861         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 862                 return;
 863
 864         mutex_lock(&mvm->mutex);
 865         iwl_mvm_fw_error_dump(mvm);
 866
 867         /* start recording again if the firmware is not crashed */
 868         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 869                      mvm->fw->dbg_dest_tlv &&
 870                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 871
 872         mutex_unlock(&mvm->mutex);
 873
 874         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 875 }
 876
 877 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 878 {
 879         iwl_abort_notification_waits(&mvm->notif_wait);
 880
 881         /*
 882          * This is a bit racy, but worst case we tell mac80211 about
 883          * a stopped/aborted scan when that was already done which
 884          * is not a problem. It is necessary to abort any os scan
 885          * here because mac80211 requires having the scan cleared
 886          * before restarting.
 887          * We'll reset the scan_status to NONE in restart cleanup in
 888          * the next start() call from mac80211. If restart isn't called
 889          * (no fw restart) scan status will stay busy.
 890          */
 891         iwl_mvm_report_scan_aborted(mvm);
 892
 893         /*
 894          * If we're restarting already, don't cycle restarts.
 895          * If INIT fw asserted, it will likely fail again.
 896          * If WoWLAN fw asserted, don't restart either, mac80211
 897          * can't recover this since we're already half suspended.
 898          */
 899         if (!mvm->restart_fw && fw_error) {
 900                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
 901         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 902                                     &mvm->status)) {
 903                 struct iwl_mvm_reprobe *reprobe;
 904
 905                 IWL_ERR(mvm,
 906                         "Firmware error during reconfiguration - reprobe!\n");
 907
 908                 /*
 909                  * get a module reference to avoid doing this while unloading
 910                  * anyway and to avoid scheduling a work with code that's
 911                  * being removed.
 912                  */
 913                 if (!try_module_get(THIS_MODULE)) {
 914                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 915                         return;
 916                 }
 917
 918                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 919                 if (!reprobe) {
 920                         module_put(THIS_MODULE);
 921                         return;
 922                 }
 923                 reprobe->dev = mvm->trans->dev;
 924                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 925                 schedule_work(&reprobe->work);
 926         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 927                 /* don't let the transport/FW power down */
 928                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 929
 930                 if (fw_error && mvm->restart_fw > 0)
 931                         mvm->restart_fw--;
 932                 ieee80211_restart_hw(mvm->hw);
 933         }
 934 }
 935
 936 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 937 {
 938         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 939
 940         iwl_mvm_dump_nic_error_log(mvm);
 941
 942         iwl_mvm_nic_restart(mvm, true);
 943 }
 944
 945 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 946 {
 947         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 948
 949         WARN_ON(1);
 950         iwl_mvm_nic_restart(mvm, true);
 951 }
 952
 953 struct iwl_d0i3_iter_data {
 954         struct iwl_mvm *mvm;
 955         u8 ap_sta_id;
 956         u8 vif_count;
 957         u8 offloading_tid;
 958         bool disable_offloading;
 959 };
 960
 961 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 962                                         struct ieee80211_vif *vif,
 963                                         struct iwl_d0i3_iter_data *iter_data)
 964 {
 965         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 966         struct ieee80211_sta *ap_sta;
 967         struct iwl_mvm_sta *mvmsta;
 968         u32 available_tids = 0;
 969         u8 tid;
 970
 971         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 972                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 973                 return false;
 974
 975         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 976         if (IS_ERR_OR_NULL(ap_sta))
 977                 return false;
 978
 979         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 980         spin_lock_bh(&mvmsta->lock);
 981         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 982                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 983
 984                 /*
 985                  * in case of pending tx packets, don't use this tid
 986                  * for offloading in order to prevent reuse of the same
 987                  * qos seq counters.
 988                  */
 989                 if (iwl_mvm_tid_queued(tid_data))
 990                         continue;
 991
 992                 if (tid_data->state != IWL_AGG_OFF)
 993                         continue;
 994
 995                 available_tids |= BIT(tid);
 996         }
 997         spin_unlock_bh(&mvmsta->lock);
 998
 999         /*
1000          * disallow protocol offloading if we have no available tid
1001          * (with no pending frames and no active aggregation,
1002          * as we don't handle "holes" properly - the scheduler needs the
1003          * frame's seq number and TFD index to match)
1004          */
1005         if (!available_tids)
1006                 return true;
1007
1008         /* for simplicity, just use the first available tid */
1009         iter_data->offloading_tid = ffs(available_tids) - 1;
1010         return false;
1011 }
1012
1013 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1014                                         struct ieee80211_vif *vif)
1015 {
1016         struct iwl_d0i3_iter_data *data = _data;
1017         struct iwl_mvm *mvm = data->mvm;
1018         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1019         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1020
1021         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1022         if (vif->type != NL80211_IFTYPE_STATION ||
1023             !vif->bss_conf.assoc)
1024                 return;
1025
1026         /*
1027          * in case of pending tx packets or active aggregations,
1028          * avoid offloading features in order to prevent reuse of
1029          * the same qos seq counters.
1030          */
1031         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1032                 data->disable_offloading = true;
1033
1034         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1035         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1036
1037         /*
1038          * on init/association, mvm already configures POWER_TABLE_CMD
1039          * and REPLY_MCAST_FILTER_CMD, so currently don't
1040          * reconfigure them (we might want to use different
1041          * params later on, though).
1042          */
1043         data->ap_sta_id = mvmvif->ap_sta_id;
1044         data->vif_count++;
1045 }
1046
1047 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1048                                     struct iwl_wowlan_config_cmd *cmd,
1049                                     struct iwl_d0i3_iter_data *iter_data)
1050 {
1051         struct ieee80211_sta *ap_sta;
1052         struct iwl_mvm_sta *mvm_ap_sta;
1053
1054         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1055                 return;
1056
1057         rcu_read_lock();
1058
1059         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1060         if (IS_ERR_OR_NULL(ap_sta))
1061                 goto out;
1062
1063         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1064         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1065         cmd->offloading_tid = iter_data->offloading_tid;
1066
1067         /*
1068          * The d0i3 uCode takes care of the nonqos counters,
1069          * so configure only the qos seq ones.
1070          */
1071         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1072 out:
1073         rcu_read_unlock();
1074 }
1075
1076 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1077 {
1078         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1079         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1080         int ret;
1081         struct iwl_d0i3_iter_data d0i3_iter_data = {
1082                 .mvm = mvm,
1083         };
1084         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1085                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1086                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1087                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1088                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1089         };
1090         struct iwl_d3_manager_config d3_cfg_cmd = {
1091                 .min_sleep_time = cpu_to_le32(1000),
1092                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1093         };
1094
1095         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1096
1097         /* make sure we have no running tx while configuring the qos */
1098         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1099         synchronize_net();
1100
1101         /*
1102          * iwl_mvm_ref_sync takes a reference before checking the flag.
1103          * so by checking there is no held reference we prevent a state
1104          * in which iwl_mvm_ref_sync continues successfully while we
1105          * configure the firmware to enter d0i3
1106          */
1107         if (iwl_mvm_ref_taken(mvm)) {
1108                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1109                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1110                 wake_up(&mvm->d0i3_exit_waitq);
1111                 return 1;
1112         }
1113
1114         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1115                                                    IEEE80211_IFACE_ITER_NORMAL,
1116                                                    iwl_mvm_enter_d0i3_iterator,
1117                                                    &d0i3_iter_data);
1118         if (d0i3_iter_data.vif_count == 1) {
1119                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1120                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1121         } else {
1122                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1123                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1124                 mvm->d0i3_offloading = false;
1125         }
1126
1127         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1128         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1129                                    sizeof(wowlan_config_cmd),
1130                                    &wowlan_config_cmd);
1131         if (ret)
1132                 return ret;
1133
1134         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1135                                     flags | CMD_MAKE_TRANS_IDLE,
1136                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1137 }
1138
1139 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1140                                        struct ieee80211_vif *vif)
1141 {
1142         struct iwl_mvm *mvm = _data;
1143         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1144
1145         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1146         if (vif->type != NL80211_IFTYPE_STATION ||
1147             !vif->bss_conf.assoc)
1148                 return;
1149
1150         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1151 }
1152
1153 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1154                                          struct ieee80211_vif *vif)
1155 {
1156         struct iwl_mvm *mvm = data;
1157         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1158
1159         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1160             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1161                 ieee80211_connection_loss(vif);
1162 }
1163
1164 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1165 {
1166         struct ieee80211_sta *sta = NULL;
1167         struct iwl_mvm_sta *mvm_ap_sta;
1168         int i;
1169         bool wake_queues = false;
1170
1171         lockdep_assert_held(&mvm->mutex);
1172
1173         spin_lock_bh(&mvm->d0i3_tx_lock);
1174
1175         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1176                 goto out;
1177
1178         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1179
1180         /* get the sta in order to update seq numbers and re-enqueue skbs */
1181         sta = rcu_dereference_protected(
1182                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1183                         lockdep_is_held(&mvm->mutex));
1184
1185         if (IS_ERR_OR_NULL(sta)) {
1186                 sta = NULL;
1187                 goto out;
1188         }
1189
1190         if (mvm->d0i3_offloading && qos_seq) {
1191                 /* update qos seq numbers if offloading was enabled */
1192                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1193                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1194                         u16 seq = le16_to_cpu(qos_seq[i]);
1195                         /* firmware stores last-used one, we store next one */
1196                         seq += 0x10;
1197                         mvm_ap_sta->tid_data[i].seq_number = seq;
1198                 }
1199         }
1200 out:
1201         /* re-enqueue (or drop) all packets */
1202         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1203                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1204
1205                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1206                         ieee80211_free_txskb(mvm->hw, skb);
1207
1208                 /* if the skb_queue is not empty, we need to wake queues */
1209                 wake_queues = true;
1210         }
1211         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1212         wake_up(&mvm->d0i3_exit_waitq);
1213         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1214         if (wake_queues)
1215                 ieee80211_wake_queues(mvm->hw);
1216
1217         spin_unlock_bh(&mvm->d0i3_tx_lock);
1218 }
1219
1220 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1221 {
1222         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1223         struct iwl_host_cmd get_status_cmd = {
1224                 .id = WOWLAN_GET_STATUSES,
1225                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1226         };
1227         struct iwl_wowlan_status *status;
1228         int ret;
1229         u32 disconnection_reasons, wakeup_reasons;
1230         __le16 *qos_seq = NULL;
1231
1232         mutex_lock(&mvm->mutex);
1233         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1234         if (ret)
1235                 goto out;
1236
1237         if (!get_status_cmd.resp_pkt)
1238                 goto out;
1239
1240         status = (void *)get_status_cmd.resp_pkt->data;
1241         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1242         qos_seq = status->qos_seq_ctr;
1243
1244         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1245
1246         disconnection_reasons =
1247                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1248                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1249         if (wakeup_reasons & disconnection_reasons)
1250                 ieee80211_iterate_active_interfaces(
1251                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1252                         iwl_mvm_d0i3_disconnect_iter, mvm);
1253
1254         iwl_free_resp(&get_status_cmd);
1255 out:
1256         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1257
1258         /* the FW might have updated the regdomain */
1259         iwl_mvm_update_changed_regdom(mvm);
1260
1261         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1262         mutex_unlock(&mvm->mutex);
1263 }
1264
1265 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1266 {
1267         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1268                     CMD_WAKE_UP_TRANS;
1269         int ret;
1270
1271         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1272
1273         mutex_lock(&mvm->d0i3_suspend_mutex);
1274         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1275                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1276                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1277                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1278                 return 0;
1279         }
1280         mutex_unlock(&mvm->d0i3_suspend_mutex);
1281
1282         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1283         if (ret)
1284                 goto out;
1285
1286         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1287                                                    IEEE80211_IFACE_ITER_NORMAL,
1288                                                    iwl_mvm_exit_d0i3_iterator,
1289                                                    mvm);
1290 out:
1291         schedule_work(&mvm->d0i3_exit_work);
1292         return ret;
1293 }
1294
1295 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1296 {
1297         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1298
1299         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1300         return _iwl_mvm_exit_d0i3(mvm);
1301 }
1302
1303 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1304                              struct napi_struct *napi,
1305                              struct net_device *napi_dev,
1306                              int (*poll)(struct napi_struct *, int),
1307                              int weight)
1308 {
1309         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1310
1311         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1312 }
1313
1314 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1315         .start = iwl_op_mode_mvm_start,
1316         .stop = iwl_op_mode_mvm_stop,
1317         .rx = iwl_mvm_rx_dispatch,
1318         .queue_full = iwl_mvm_stop_sw_queue,
1319         .queue_not_full = iwl_mvm_wake_sw_queue,
1320         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1321         .free_skb = iwl_mvm_free_skb,
1322         .nic_error = iwl_mvm_nic_error,
1323         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1324         .nic_config = iwl_mvm_nic_config,
1325         .enter_d0i3 = iwl_mvm_enter_d0i3,
1326         .exit_d0i3 = iwl_mvm_exit_d0i3,
1327         .napi_add = iwl_mvm_napi_add,
1328 };