/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called COPYING. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *****************************************************************************/ #include #include #include #include "iwl-notif-wait.h" #include "iwl-trans.h" #include "iwl-op-mode.h" #include "iwl-fw.h" #include "iwl-debug.h" #include "iwl-drv.h" #include "iwl-modparams.h" #include "mvm.h" #include "iwl-phy-db.h" #include "iwl-eeprom-parse.h" #include "iwl-csr.h" #include "iwl-io.h" #include "iwl-prph.h" #include "rs.h" #include "fw-api-scan.h" #include "time-event.h" #include "iwl-fw-error-dump.h" /* * module name, copyright, version, etc. */ #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux" #define DRV_VERSION IWLWIFI_VERSION MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_LICENSE("GPL"); static const struct iwl_op_mode_ops iwl_mvm_ops; struct iwl_mvm_mod_params iwlmvm_mod_params = { .power_scheme = IWL_POWER_SCHEME_BPS, /* rest of fields are 0 by default */ }; module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO); MODULE_PARM_DESC(init_dbg, "set to true to debug an ASSERT in INIT fw (default: false"); module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO); MODULE_PARM_DESC(power_scheme, "power management scheme: 1-active, 2-balanced, 3-low power, default: 2"); /* * module init and exit functions */ static int __init iwl_mvm_init(void) { int ret; ret = iwl_mvm_rate_control_register(); if (ret) { pr_err("Unable to register rate control algorithm: %d\n", ret); return ret; } ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops); if (ret) { pr_err("Unable to register MVM op_mode: %d\n", ret); iwl_mvm_rate_control_unregister(); } return ret; } module_init(iwl_mvm_init); static void __exit iwl_mvm_exit(void) { iwl_opmode_deregister("iwlmvm"); iwl_mvm_rate_control_unregister(); } module_exit(iwl_mvm_exit); static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash; u32 reg_val = 0; radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >> FW_PHY_CFG_RADIO_TYPE_POS; radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >> FW_PHY_CFG_RADIO_STEP_POS; radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >> FW_PHY_CFG_RADIO_DASH_POS; /* SKU control */ reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) << CSR_HW_IF_CONFIG_REG_POS_MAC_STEP; reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) << CSR_HW_IF_CONFIG_REG_POS_MAC_DASH; /* radio configuration */ reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE; reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP; reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH; WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) & ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE); /* * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and * shouldn't be set to any non-zero value. The same is supposed to be * true of the other HW, but unsetting them (such as the 7260) causes * automatic tests to fail on seemingly unrelated errors. Need to * further investigate this, but for now we'll separate cases. */ if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI; iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH | CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP | CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE | CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP | CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH | CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI | CSR_HW_IF_CONFIG_REG_BIT_MAC_SI, reg_val); IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type, radio_cfg_step, radio_cfg_dash); /* * W/A : NIC is stuck in a reset state after Early PCIe power off * (PCIe power is lost before PERST# is asserted), causing ME FW * to lose ownership and not being able to obtain it back. */ if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG, APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS, ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS); } struct iwl_rx_handlers { u8 cmd_id; bool async; int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd); }; #define RX_HANDLER(_cmd_id, _fn, _async) \ { .cmd_id = _cmd_id , .fn = _fn , .async = _async } /* * Handlers for fw notifications * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME * This list should be in order of frequency for performance purposes. * * The handler can be SYNC - this means that it will be called in the Rx path * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and * only in this case!), it should be set as ASYNC. In that case, it will be * called from a worker with mvm->mutex held. */ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = { RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false), RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false), RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false), RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false), RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true), RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true), RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true), RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION, iwl_mvm_rx_ant_coupling_notif, true), RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false), RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false), RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false), RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true), RX_HANDLER(SCAN_OFFLOAD_COMPLETE, iwl_mvm_rx_scan_offload_complete_notif, true), RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results, false), RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false), RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false), RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif, false), RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false), RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION, iwl_mvm_power_uapsd_misbehaving_ap_notif, false), }; #undef RX_HANDLER #define CMD(x) [x] = #x static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = { CMD(MVM_ALIVE), CMD(REPLY_ERROR), CMD(INIT_COMPLETE_NOTIF), CMD(PHY_CONTEXT_CMD), CMD(MGMT_MCAST_KEY), CMD(TX_CMD), CMD(TXPATH_FLUSH), CMD(MAC_CONTEXT_CMD), CMD(TIME_EVENT_CMD), CMD(TIME_EVENT_NOTIFICATION), CMD(BINDING_CONTEXT_CMD), CMD(TIME_QUOTA_CMD), CMD(NON_QOS_TX_COUNTER_CMD), CMD(RADIO_VERSION_NOTIFICATION), CMD(SCAN_REQUEST_CMD), CMD(SCAN_ABORT_CMD), CMD(SCAN_START_NOTIFICATION), CMD(SCAN_RESULTS_NOTIFICATION), CMD(SCAN_COMPLETE_NOTIFICATION), CMD(NVM_ACCESS_CMD), CMD(PHY_CONFIGURATION_CMD), CMD(CALIB_RES_NOTIF_PHY_DB), CMD(SET_CALIB_DEFAULT_CMD), CMD(CALIBRATION_COMPLETE_NOTIFICATION), CMD(ADD_STA_KEY), CMD(ADD_STA), CMD(REMOVE_STA), CMD(LQ_CMD), CMD(SCAN_OFFLOAD_CONFIG_CMD), CMD(MATCH_FOUND_NOTIFICATION), CMD(SCAN_OFFLOAD_REQUEST_CMD), CMD(SCAN_OFFLOAD_ABORT_CMD), CMD(SCAN_OFFLOAD_COMPLETE), CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD), CMD(SCAN_ITERATION_COMPLETE), CMD(POWER_TABLE_CMD), CMD(WEP_KEY), CMD(REPLY_RX_PHY_CMD), CMD(REPLY_RX_MPDU_CMD), CMD(BEACON_NOTIFICATION), CMD(BEACON_TEMPLATE_CMD), CMD(STATISTICS_NOTIFICATION), CMD(EOSP_NOTIFICATION), CMD(REDUCE_TX_POWER_CMD), CMD(TX_ANT_CONFIGURATION_CMD), CMD(D3_CONFIG_CMD), CMD(D0I3_END_CMD), CMD(PROT_OFFLOAD_CONFIG_CMD), CMD(OFFLOADS_QUERY_CMD), CMD(REMOTE_WAKE_CONFIG_CMD), CMD(WOWLAN_PATTERNS), CMD(WOWLAN_CONFIGURATION), CMD(WOWLAN_TSC_RSC_PARAM), CMD(WOWLAN_TKIP_PARAM), CMD(WOWLAN_KEK_KCK_MATERIAL), CMD(WOWLAN_GET_STATUSES), CMD(WOWLAN_TX_POWER_PER_DB), CMD(NET_DETECT_CONFIG_CMD), CMD(NET_DETECT_PROFILES_QUERY_CMD), CMD(NET_DETECT_PROFILES_CMD), CMD(NET_DETECT_HOTSPOTS_CMD), CMD(NET_DETECT_HOTSPOTS_QUERY_CMD), CMD(CARD_STATE_NOTIFICATION), CMD(MISSED_BEACONS_NOTIFICATION), CMD(BT_COEX_PRIO_TABLE), CMD(BT_COEX_PROT_ENV), CMD(BT_PROFILE_NOTIFICATION), CMD(BT_CONFIG), CMD(MCAST_FILTER_CMD), CMD(BCAST_FILTER_CMD), CMD(REPLY_SF_CFG_CMD), CMD(REPLY_BEACON_FILTERING_CMD), CMD(REPLY_THERMAL_MNG_BACKOFF), CMD(MAC_PM_POWER_TABLE), CMD(BT_COEX_CI), CMD(BT_COEX_UPDATE_SW_BOOST), CMD(BT_COEX_UPDATE_CORUN_LUT), CMD(BT_COEX_UPDATE_REDUCED_TXP), CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION), CMD(ANTENNA_COUPLING_NOTIFICATION), }; #undef CMD /* this forward declaration can avoid to export the function */ static void iwl_mvm_async_handlers_wk(struct work_struct *wk); static void iwl_mvm_d0i3_exit_work(struct work_struct *wk); static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg) { const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs; if (!pwr_tx_backoff) return 0; while (pwr_tx_backoff->pwr) { if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr) return pwr_tx_backoff->backoff; pwr_tx_backoff++; } return 0; } static struct iwl_op_mode * iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg, const struct iwl_fw *fw, struct dentry *dbgfs_dir) { struct ieee80211_hw *hw; struct iwl_op_mode *op_mode; struct iwl_mvm *mvm; struct iwl_trans_config trans_cfg = {}; static const u8 no_reclaim_cmds[] = { TX_CMD, }; int err, scan_size; u32 min_backoff; /* * We use IWL_MVM_STATION_COUNT to check the validity of the station * index all over the driver - check that its value corresponds to the * array size. */ BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT); /******************************** * 1. Allocating and configuring HW data ********************************/ hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) + sizeof(struct iwl_mvm), &iwl_mvm_hw_ops); if (!hw) return NULL; if (cfg->max_rx_agg_size) hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size; op_mode = hw->priv; op_mode->ops = &iwl_mvm_ops; mvm = IWL_OP_MODE_GET_MVM(op_mode); mvm->dev = trans->dev; mvm->trans = trans; mvm->cfg = cfg; mvm->fw = fw; mvm->hw = hw; mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0; mvm->aux_queue = 15; mvm->first_agg_queue = 16; mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1; if (mvm->cfg->base_params->num_of_queues == 16) { mvm->aux_queue = 11; mvm->first_agg_queue = 12; } mvm->sf_state = SF_UNINIT; mutex_init(&mvm->mutex); mutex_init(&mvm->d0i3_suspend_mutex); spin_lock_init(&mvm->async_handlers_lock); INIT_LIST_HEAD(&mvm->time_event_list); INIT_LIST_HEAD(&mvm->async_handlers_list); spin_lock_init(&mvm->time_event_lock); INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk); INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk); INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk); INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work); spin_lock_init(&mvm->d0i3_tx_lock); spin_lock_init(&mvm->refs_lock); skb_queue_head_init(&mvm->d0i3_tx); init_waitqueue_head(&mvm->d0i3_exit_waitq); SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev); /* * Populate the state variables that the transport layer needs * to know about. */ trans_cfg.op_mode = op_mode; trans_cfg.no_reclaim_cmds = no_reclaim_cmds; trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds); trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K; if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE) trans_cfg.bc_table_dword = true; if (!iwlwifi_mod_params.wd_disable) trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout; else trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED; trans_cfg.command_names = iwl_mvm_cmd_strings; trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE; trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO; snprintf(mvm->hw->wiphy->fw_version, sizeof(mvm->hw->wiphy->fw_version), "%s", fw->fw_version); /* Configure transport layer */ iwl_trans_configure(mvm->trans, &trans_cfg); trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD; trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start); /* set up notification wait support */ iwl_notification_wait_init(&mvm->notif_wait); /* Init phy db */ mvm->phy_db = iwl_phy_db_init(trans); if (!mvm->phy_db) { IWL_ERR(mvm, "Cannot init phy_db\n"); goto out_free; } IWL_INFO(mvm, "Detected %s, REV=0x%X\n", mvm->cfg->name, mvm->trans->hw_rev); min_backoff = calc_min_backoff(trans, cfg); iwl_mvm_tt_initialize(mvm, min_backoff); /* set the nvm_file_name according to priority */ if (iwlwifi_mod_params.nvm_file) mvm->nvm_file_name = iwlwifi_mod_params.nvm_file; else mvm->nvm_file_name = mvm->cfg->default_nvm_file; if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name, "not allowing power-up and not having nvm_file\n")) goto out_free; /* * Even if nvm exists in the nvm_file driver should read agin the nvm * from the nic because there might be entries that exist in the OTP * and not in the file. * for nics with no_power_up_nic_in_init: rely completley on nvm_file */ if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) { err = iwl_nvm_init(mvm, false); if (err) goto out_free; } else { err = iwl_trans_start_hw(mvm->trans); if (err) goto out_free; mutex_lock(&mvm->mutex); err = iwl_run_init_mvm_ucode(mvm, true); iwl_trans_stop_device(trans); mutex_unlock(&mvm->mutex); /* returns 0 if successful, 1 if success but in rfkill */ if (err < 0 && !iwlmvm_mod_params.init_dbg) { IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err); goto out_free; } } if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) scan_size = sizeof(struct iwl_scan_req_unified_lmac) + sizeof(struct iwl_scan_channel_cfg_lmac) * mvm->fw->ucode_capa.n_scan_channels + sizeof(struct iwl_scan_probe_req); else scan_size = sizeof(struct iwl_scan_cmd) + mvm->fw->ucode_capa.max_probe_length + mvm->fw->ucode_capa.n_scan_channels * sizeof(struct iwl_scan_channel); mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL); if (!mvm->scan_cmd) goto out_free; err = iwl_mvm_mac_setup_register(mvm); if (err) goto out_free; err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir); if (err) goto out_unregister; memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx)); /* rpm starts with a taken ref. only set the appropriate bit here. */ mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1; return op_mode; out_unregister: ieee80211_unregister_hw(mvm->hw); iwl_mvm_leds_exit(mvm); out_free: iwl_phy_db_free(mvm->phy_db); kfree(mvm->scan_cmd); if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name) iwl_trans_op_mode_leave(trans); ieee80211_free_hw(mvm->hw); return NULL; } static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); int i; iwl_mvm_leds_exit(mvm); iwl_mvm_tt_exit(mvm); ieee80211_unregister_hw(mvm->hw); kfree(mvm->scan_cmd); vfree(mvm->fw_error_dump); kfree(mvm->mcast_filter_cmd); mvm->mcast_filter_cmd = NULL; #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS) kfree(mvm->d3_resume_sram); #endif iwl_trans_op_mode_leave(mvm->trans); iwl_phy_db_free(mvm->phy_db); mvm->phy_db = NULL; iwl_free_nvm_data(mvm->nvm_data); for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++) kfree(mvm->nvm_sections[i].data); ieee80211_free_hw(mvm->hw); } struct iwl_async_handler_entry { struct list_head list; struct iwl_rx_cmd_buffer rxb; int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd); }; void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm) { struct iwl_async_handler_entry *entry, *tmp; spin_lock_bh(&mvm->async_handlers_lock); list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) { iwl_free_rxb(&entry->rxb); list_del(&entry->list); kfree(entry); } spin_unlock_bh(&mvm->async_handlers_lock); } static void iwl_mvm_async_handlers_wk(struct work_struct *wk) { struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, async_handlers_wk); struct iwl_async_handler_entry *entry, *tmp; struct list_head local_list; INIT_LIST_HEAD(&local_list); /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */ mutex_lock(&mvm->mutex); /* * Sync with Rx path with a lock. Remove all the entries from this list, * add them to a local one (lock free), and then handle them. */ spin_lock_bh(&mvm->async_handlers_lock); list_splice_init(&mvm->async_handlers_list, &local_list); spin_unlock_bh(&mvm->async_handlers_lock); list_for_each_entry_safe(entry, tmp, &local_list, list) { if (entry->fn(mvm, &entry->rxb, NULL)) IWL_WARN(mvm, "returned value from ASYNC handlers are ignored\n"); iwl_free_rxb(&entry->rxb); list_del(&entry->list); kfree(entry); } mutex_unlock(&mvm->mutex); } static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); u8 i; /* * Do the notification wait before RX handlers so * even if the RX handler consumes the RXB we have * access to it in the notification wait entry. */ iwl_notification_wait_notify(&mvm->notif_wait, pkt); for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) { const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i]; struct iwl_async_handler_entry *entry; if (rx_h->cmd_id != pkt->hdr.cmd) continue; if (!rx_h->async) return rx_h->fn(mvm, rxb, cmd); entry = kzalloc(sizeof(*entry), GFP_ATOMIC); /* we can't do much... */ if (!entry) return 0; entry->rxb._page = rxb_steal_page(rxb); entry->rxb._offset = rxb->_offset; entry->rxb._rx_page_order = rxb->_rx_page_order; entry->fn = rx_h->fn; spin_lock(&mvm->async_handlers_lock); list_add_tail(&entry->list, &mvm->async_handlers_list); spin_unlock(&mvm->async_handlers_lock); schedule_work(&mvm->async_handlers_wk); break; } return 0; } static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); int mq = mvm->queue_to_mac80211[queue]; if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE)) return; if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) { IWL_DEBUG_TX_QUEUES(mvm, "queue %d (mac80211 %d) already stopped\n", queue, mq); return; } set_bit(mq, &mvm->transport_queue_stop); ieee80211_stop_queue(mvm->hw, mq); } static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); int mq = mvm->queue_to_mac80211[queue]; if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE)) return; if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) { IWL_DEBUG_TX_QUEUES(mvm, "queue %d (mac80211 %d) already awake\n", queue, mq); return; } clear_bit(mq, &mvm->transport_queue_stop); ieee80211_wake_queue(mvm->hw, mq); } void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state) { if (state) set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status); else clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status); wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm)); } static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); if (state) set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status); else clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status); wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm)); return state && mvm->cur_ucode != IWL_UCODE_INIT; } static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); struct ieee80211_tx_info *info; info = IEEE80211_SKB_CB(skb); iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); ieee80211_free_txskb(mvm->hw, skb); } struct iwl_mvm_reprobe { struct device *dev; struct work_struct work; }; static void iwl_mvm_reprobe_wk(struct work_struct *wk) { struct iwl_mvm_reprobe *reprobe; reprobe = container_of(wk, struct iwl_mvm_reprobe, work); if (device_reprobe(reprobe->dev)) dev_err(reprobe->dev, "reprobe failed!\n"); kfree(reprobe); module_put(THIS_MODULE); } void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error) { iwl_abort_notification_waits(&mvm->notif_wait); /* * This is a bit racy, but worst case we tell mac80211 about * a stopped/aborted scan when that was already done which * is not a problem. It is necessary to abort any os scan * here because mac80211 requires having the scan cleared * before restarting. * We'll reset the scan_status to NONE in restart cleanup in * the next start() call from mac80211. If restart isn't called * (no fw restart) scan status will stay busy. */ switch (mvm->scan_status) { case IWL_MVM_SCAN_NONE: break; case IWL_MVM_SCAN_OS: ieee80211_scan_completed(mvm->hw, true); break; case IWL_MVM_SCAN_SCHED: /* Sched scan will be restarted by mac80211 in restart_hw. */ if (!mvm->restart_fw) ieee80211_sched_scan_stopped(mvm->hw); break; } /* * If we're restarting already, don't cycle restarts. * If INIT fw asserted, it will likely fail again. * If WoWLAN fw asserted, don't restart either, mac80211 * can't recover this since we're already half suspended. */ if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { struct iwl_mvm_reprobe *reprobe; IWL_ERR(mvm, "Firmware error during reconfiguration - reprobe!\n"); /* * get a module reference to avoid doing this while unloading * anyway and to avoid scheduling a work with code that's * being removed. */ if (!try_module_get(THIS_MODULE)) { IWL_ERR(mvm, "Module is being unloaded - abort\n"); return; } reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC); if (!reprobe) { module_put(THIS_MODULE); return; } reprobe->dev = mvm->trans->dev; INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk); schedule_work(&reprobe->work); } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && (!fw_error || mvm->restart_fw)) { /* don't let the transport/FW power down */ iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN); if (fw_error && mvm->restart_fw > 0) mvm->restart_fw--; ieee80211_restart_hw(mvm->hw); } } static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); iwl_mvm_dump_nic_error_log(mvm); iwl_mvm_nic_restart(mvm, true); } static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); WARN_ON(1); iwl_mvm_nic_restart(mvm, true); } struct iwl_d0i3_iter_data { struct iwl_mvm *mvm; u8 ap_sta_id; u8 vif_count; u8 offloading_tid; bool disable_offloading; }; static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_d0i3_iter_data *iter_data) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct ieee80211_sta *ap_sta; struct iwl_mvm_sta *mvmsta; u32 available_tids = 0; u8 tid; if (WARN_ON(vif->type != NL80211_IFTYPE_STATION || mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)) return false; ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]); if (IS_ERR_OR_NULL(ap_sta)) return false; mvmsta = iwl_mvm_sta_from_mac80211(ap_sta); spin_lock_bh(&mvmsta->lock); for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) { struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; /* * in case of pending tx packets, don't use this tid * for offloading in order to prevent reuse of the same * qos seq counters. */ if (iwl_mvm_tid_queued(tid_data)) continue; if (tid_data->state != IWL_AGG_OFF) continue; available_tids |= BIT(tid); } spin_unlock_bh(&mvmsta->lock); /* * disallow protocol offloading if we have no available tid * (with no pending frames and no active aggregation, * as we don't handle "holes" properly - the scheduler needs the * frame's seq number and TFD index to match) */ if (!available_tids) return true; /* for simplicity, just use the first available tid */ iter_data->offloading_tid = ffs(available_tids) - 1; return false; } static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_d0i3_iter_data *data = _data; struct iwl_mvm *mvm = data->mvm; struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE; IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr); if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) return; /* * in case of pending tx packets or active aggregations, * avoid offloading features in order to prevent reuse of * the same qos seq counters. */ if (iwl_mvm_disallow_offloading(mvm, vif, data)) data->disable_offloading = true; iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags); iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags); /* * on init/association, mvm already configures POWER_TABLE_CMD * and REPLY_MCAST_FILTER_CMD, so currently don't * reconfigure them (we might want to use different * params later on, though). */ data->ap_sta_id = mvmvif->ap_sta_id; data->vif_count++; } static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm, struct iwl_wowlan_config_cmd_v3 *cmd, struct iwl_d0i3_iter_data *iter_data) { struct ieee80211_sta *ap_sta; struct iwl_mvm_sta *mvm_ap_sta; if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT) return; rcu_read_lock(); ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]); if (IS_ERR_OR_NULL(ap_sta)) goto out; mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta); cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported; cmd->offloading_tid = iter_data->offloading_tid; /* * The d0i3 uCode takes care of the nonqos counters, * so configure only the qos seq ones. */ iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common); out: rcu_read_unlock(); } static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE; int ret; struct iwl_d0i3_iter_data d0i3_iter_data = { .mvm = mvm, }; struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = { .common = { .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME | IWL_WOWLAN_WAKEUP_BEACON_MISS | IWL_WOWLAN_WAKEUP_LINK_CHANGE | IWL_WOWLAN_WAKEUP_BCN_FILTERING), }, }; struct iwl_d3_manager_config d3_cfg_cmd = { .min_sleep_time = cpu_to_le32(1000), }; IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n"); /* make sure we have no running tx while configuring the qos */ set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status); synchronize_net(); ieee80211_iterate_active_interfaces_atomic(mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_enter_d0i3_iterator, &d0i3_iter_data); if (d0i3_iter_data.vif_count == 1) { mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id; mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading; } else { WARN_ON_ONCE(d0i3_iter_data.vif_count > 1); mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; mvm->d0i3_offloading = false; } iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data); ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags, sizeof(wowlan_config_cmd), &wowlan_config_cmd); if (ret) return ret; return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD, flags | CMD_MAKE_TRANS_IDLE, sizeof(d3_cfg_cmd), &d3_cfg_cmd); } static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm *mvm = _data; u32 flags = CMD_ASYNC | CMD_HIGH_PRIO; IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr); if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) return; iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags); } static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm *mvm = data; struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc && mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) ieee80211_connection_loss(vif); } void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq) { struct ieee80211_sta *sta = NULL; struct iwl_mvm_sta *mvm_ap_sta; int i; bool wake_queues = false; lockdep_assert_held(&mvm->mutex); spin_lock_bh(&mvm->d0i3_tx_lock); if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT) goto out; IWL_DEBUG_RPM(mvm, "re-enqueue packets\n"); /* get the sta in order to update seq numbers and re-enqueue skbs */ sta = rcu_dereference_protected( mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id], lockdep_is_held(&mvm->mutex)); if (IS_ERR_OR_NULL(sta)) { sta = NULL; goto out; } if (mvm->d0i3_offloading && qos_seq) { /* update qos seq numbers if offloading was enabled */ mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv; for (i = 0; i < IWL_MAX_TID_COUNT; i++) { u16 seq = le16_to_cpu(qos_seq[i]); /* firmware stores last-used one, we store next one */ seq += 0x10; mvm_ap_sta->tid_data[i].seq_number = seq; } } out: /* re-enqueue (or drop) all packets */ while (!skb_queue_empty(&mvm->d0i3_tx)) { struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx); if (!sta || iwl_mvm_tx_skb(mvm, skb, sta)) ieee80211_free_txskb(mvm->hw, skb); /* if the skb_queue is not empty, we need to wake queues */ wake_queues = true; } clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status); wake_up(&mvm->d0i3_exit_waitq); mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; if (wake_queues) ieee80211_wake_queues(mvm->hw); spin_unlock_bh(&mvm->d0i3_tx_lock); } static void iwl_mvm_d0i3_exit_work(struct work_struct *wk) { struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work); struct iwl_host_cmd get_status_cmd = { .id = WOWLAN_GET_STATUSES, .flags = CMD_HIGH_PRIO | CMD_WANT_SKB, }; struct iwl_wowlan_status *status; int ret; u32 disconnection_reasons, wakeup_reasons; __le16 *qos_seq = NULL; mutex_lock(&mvm->mutex); ret = iwl_mvm_send_cmd(mvm, &get_status_cmd); if (ret) goto out; if (!get_status_cmd.resp_pkt) goto out; status = (void *)get_status_cmd.resp_pkt->data; wakeup_reasons = le32_to_cpu(status->wakeup_reasons); qos_seq = status->qos_seq_ctr; IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons); disconnection_reasons = IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON | IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH; if (wakeup_reasons & disconnection_reasons) ieee80211_iterate_active_interfaces( mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_d0i3_disconnect_iter, mvm); iwl_free_resp(&get_status_cmd); out: iwl_mvm_d0i3_enable_tx(mvm, qos_seq); iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK); mutex_unlock(&mvm->mutex); } int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm) { u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE | CMD_WAKE_UP_TRANS; int ret; IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n"); mutex_lock(&mvm->d0i3_suspend_mutex); if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) { IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n"); __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags); mutex_unlock(&mvm->d0i3_suspend_mutex); return 0; } mutex_unlock(&mvm->d0i3_suspend_mutex); ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL); if (ret) goto out; ieee80211_iterate_active_interfaces_atomic(mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_exit_d0i3_iterator, mvm); out: schedule_work(&mvm->d0i3_exit_work); return ret; } static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK); return _iwl_mvm_exit_d0i3(mvm); } static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode, struct napi_struct *napi, struct net_device *napi_dev, int (*poll)(struct napi_struct *, int), int weight) { struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight); } static const struct iwl_op_mode_ops iwl_mvm_ops = { .start = iwl_op_mode_mvm_start, .stop = iwl_op_mode_mvm_stop, .rx = iwl_mvm_rx_dispatch, .queue_full = iwl_mvm_stop_sw_queue, .queue_not_full = iwl_mvm_wake_sw_queue, .hw_rf_kill = iwl_mvm_set_hw_rfkill_state, .free_skb = iwl_mvm_free_skb, .nic_error = iwl_mvm_nic_error, .cmd_queue_full = iwl_mvm_cmd_queue_full, .nic_config = iwl_mvm_nic_config, .enter_d0i3 = iwl_mvm_enter_d0i3, .exit_d0i3 = iwl_mvm_exit_d0i3, .napi_add = iwl_mvm_napi_add, };