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