| /****************************************************************************** |
| * |
| * 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 - 2013 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 <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2012 - 2013 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 <linux/module.h> |
| #include <net/mac80211.h> |
| |
| #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" |
| |
| /* |
| * 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); |
| |
| /* silicon bits */ |
| 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. |
| */ |
| 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, false), |
| RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true), |
| |
| RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false), |
| |
| RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false), |
| RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, 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), |
| }; |
| #undef RX_HANDLER |
| #define CMD(x) [x] = #x |
| |
| static const char *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(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), |
| CMD(REMOVE_STA), |
| CMD(LQ_CMD), |
| CMD(SCAN_OFFLOAD_CONFIG_CMD), |
| CMD(SCAN_OFFLOAD_REQUEST_CMD), |
| CMD(SCAN_OFFLOAD_ABORT_CMD), |
| CMD(SCAN_OFFLOAD_COMPLETE), |
| CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD), |
| 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(REDUCE_TX_POWER_CMD), |
| CMD(TX_ANT_CONFIGURATION_CMD), |
| CMD(D3_CONFIG_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(REPLY_BEACON_FILTERING_CMD), |
| CMD(REPLY_THERMAL_MNG_BACKOFF), |
| CMD(MAC_PM_POWER_TABLE), |
| }; |
| #undef CMD |
| |
| /* this forward declaration can avoid to export the function */ |
| static void iwl_mvm_async_handlers_wk(struct work_struct *wk); |
| |
| 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; |
| |
| /******************************** |
| * 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; |
| |
| op_mode = hw->priv; |
| op_mode->ops = &iwl_mvm_ops; |
| op_mode->trans = trans; |
| |
| 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; |
| |
| mutex_init(&mvm->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); |
| |
| 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); |
| |
| err = iwl_trans_start_hw(mvm->trans); |
| if (err) |
| goto out_free; |
| |
| iwl_mvm_tt_initialize(mvm); |
| |
| mutex_lock(&mvm->mutex); |
| err = iwl_run_init_mvm_ucode(mvm, true); |
| 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; |
| } |
| |
| /* Stop the hw after the ALIVE and NVM has been read */ |
| if (!iwlmvm_mod_params.init_dbg) |
| iwl_trans_stop_hw(mvm->trans, false); |
| |
| scan_size = sizeof(struct iwl_scan_cmd) + |
| mvm->fw->ucode_capa.max_probe_length + |
| (MAX_NUM_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; |
| |
| if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD) |
| mvm->pm_ops = &pm_mac_ops; |
| else |
| mvm->pm_ops = &pm_legacy_ops; |
| |
| return op_mode; |
| |
| out_unregister: |
| ieee80211_unregister_hw(mvm->hw); |
| out_free: |
| iwl_phy_db_free(mvm->phy_db); |
| kfree(mvm->scan_cmd); |
| iwl_trans_stop_hw(trans, true); |
| 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); |
| |
| #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS) |
| kfree(mvm->d3_resume_sram); |
| #endif |
| |
| iwl_trans_stop_hw(mvm->trans, true); |
| |
| iwl_phy_db_free(mvm->phy_db); |
| mvm->phy_db = NULL; |
| |
| iwl_free_nvm_data(mvm->nvm_data); |
| for (i = 0; i < NVM_NUM_OF_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 void 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)); |
| } |
| |
| 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); |
| } |
| |
| static void iwl_mvm_nic_restart(struct iwl_mvm *mvm) |
| { |
| iwl_abort_notification_waits(&mvm->notif_wait); |
| |
| /* |
| * 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 && mvm->restart_fw) { |
| /* |
| * This is a bit racy, but worst case we tell mac80211 about |
| * a stopped/aborted (sched) scan when that was already done |
| * which is not a problem. It is necessary to abort any 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. |
| */ |
| switch (mvm->scan_status) { |
| case IWL_MVM_SCAN_NONE: |
| break; |
| case IWL_MVM_SCAN_OS: |
| ieee80211_scan_completed(mvm->hw, true); |
| break; |
| } |
| |
| if (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); |
| if (!mvm->restart_fw) |
| iwl_mvm_dump_sram(mvm); |
| |
| iwl_mvm_nic_restart(mvm); |
| } |
| |
| 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); |
| } |
| |
| 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, |
| }; |