/****************************************************************************** * * 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) 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 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 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 #include "fw-api-bt-coex.h" #include "iwl-modparams.h" #include "mvm.h" #include "iwl-debug.h" #define EVENT_PRIO_ANT(_evt, _prio, _shrd_ant) \ [(_evt)] = (((_prio) << BT_COEX_PRIO_TBL_PRIO_POS) | \ ((_shrd_ant) << BT_COEX_PRIO_TBL_SHRD_ANT_POS)) static const u8 iwl_bt_prio_tbl[BT_COEX_PRIO_TBL_EVT_MAX] = { EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_INIT_CALIB1, BT_COEX_PRIO_TBL_PRIO_BYPASS, 0), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_INIT_CALIB2, BT_COEX_PRIO_TBL_PRIO_BYPASS, 1), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_LOW1, BT_COEX_PRIO_TBL_PRIO_LOW, 0), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_LOW2, BT_COEX_PRIO_TBL_PRIO_LOW, 1), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_HIGH1, BT_COEX_PRIO_TBL_PRIO_HIGH, 0), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_HIGH2, BT_COEX_PRIO_TBL_PRIO_HIGH, 1), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_DTIM, BT_COEX_PRIO_TBL_DISABLED, 0), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_SCAN52, BT_COEX_PRIO_TBL_PRIO_COEX_OFF, 0), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_SCAN24, BT_COEX_PRIO_TBL_PRIO_COEX_ON, 0), EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_IDLE, BT_COEX_PRIO_TBL_PRIO_COEX_IDLE, 0), 0, 0, 0, 0, 0, 0, }; #undef EVENT_PRIO_ANT /* BT Antenna Coupling Threshold (dB) */ #define IWL_BT_ANTENNA_COUPLING_THRESHOLD (35) #define IWL_BT_LOAD_FORCE_SISO_THRESHOLD (3) #define BT_ENABLE_REDUCED_TXPOWER_THRESHOLD (-62) #define BT_DISABLE_REDUCED_TXPOWER_THRESHOLD (-65) #define BT_REDUCED_TX_POWER_BIT BIT(7) static inline bool is_loose_coex(void) { return iwlwifi_mod_params.ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD; } int iwl_send_bt_prio_tbl(struct iwl_mvm *mvm) { return iwl_mvm_send_cmd_pdu(mvm, BT_COEX_PRIO_TABLE, CMD_SYNC, sizeof(struct iwl_bt_coex_prio_tbl_cmd), &iwl_bt_prio_tbl); } static int iwl_send_bt_env(struct iwl_mvm *mvm, u8 action, u8 type) { struct iwl_bt_coex_prot_env_cmd env_cmd; int ret; env_cmd.action = action; env_cmd.type = type; ret = iwl_mvm_send_cmd_pdu(mvm, BT_COEX_PROT_ENV, CMD_SYNC, sizeof(env_cmd), &env_cmd); if (ret) IWL_ERR(mvm, "failed to send BT env command\n"); return ret; } enum iwl_bt_kill_msk { BT_KILL_MSK_DEFAULT, BT_KILL_MSK_SCO_HID_A2DP, BT_KILL_MSK_REDUCED_TXPOW, BT_KILL_MSK_MAX, }; static const u32 iwl_bt_ack_kill_msk[BT_KILL_MSK_MAX] = { [BT_KILL_MSK_DEFAULT] = 0xffff0000, [BT_KILL_MSK_SCO_HID_A2DP] = 0xffffffff, [BT_KILL_MSK_REDUCED_TXPOW] = 0, }; static const u32 iwl_bt_cts_kill_msk[BT_KILL_MSK_MAX] = { [BT_KILL_MSK_DEFAULT] = 0xffff0000, [BT_KILL_MSK_SCO_HID_A2DP] = 0xffffffff, [BT_KILL_MSK_REDUCED_TXPOW] = 0, }; #define IWL_BT_DEFAULT_BOOST (0xf0f0f0f0) /* Tight Coex */ static const __le32 iwl_tight_lookup[BT_COEX_LUT_SIZE] = { cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaeaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xcc00ff28), cpu_to_le32(0x0000aaaa), cpu_to_le32(0xcc00aaaa), cpu_to_le32(0x0000aaaa), cpu_to_le32(0xc0004000), cpu_to_le32(0x00000000), cpu_to_le32(0xf0005000), cpu_to_le32(0xf0005000), }; /* Loose Coex */ static const __le32 iwl_loose_lookup[BT_COEX_LUT_SIZE] = { cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaeaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xcc00ff28), cpu_to_le32(0x0000aaaa), cpu_to_le32(0xcc00aaaa), cpu_to_le32(0x0000aaaa), cpu_to_le32(0x00000000), cpu_to_le32(0x00000000), cpu_to_le32(0xf0005000), cpu_to_le32(0xf0005000), }; /* Full concurrency */ static const __le32 iwl_concurrent_lookup[BT_COEX_LUT_SIZE] = { cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0x00000000), cpu_to_le32(0x00000000), cpu_to_le32(0x00000000), cpu_to_le32(0x00000000), }; int iwl_send_bt_init_conf(struct iwl_mvm *mvm) { struct iwl_bt_coex_cmd cmd = { .max_kill = 5, .bt3_time_t7_value = 1, .bt3_prio_sample_time = 2, .bt3_timer_t2_value = 0xc, }; int ret; cmd.flags = iwlwifi_mod_params.bt_coex_active ? BT_COEX_NW : BT_COEX_DISABLE; cmd.flags |= BT_CH_PRIMARY_EN | BT_SYNC_2_BT_DISABLE; cmd.valid_bit_msk = cpu_to_le16(BT_VALID_ENABLE | BT_VALID_BT_PRIO_BOOST | BT_VALID_MAX_KILL | BT_VALID_3W_TMRS | BT_VALID_KILL_ACK | BT_VALID_KILL_CTS | BT_VALID_REDUCED_TX_POWER | BT_VALID_LUT); if (is_loose_coex()) memcpy(&cmd.decision_lut, iwl_loose_lookup, sizeof(iwl_tight_lookup)); else memcpy(&cmd.decision_lut, iwl_tight_lookup, sizeof(iwl_tight_lookup)); cmd.bt_prio_boost = cpu_to_le32(IWL_BT_DEFAULT_BOOST); cmd.kill_ack_msk = cpu_to_le32(iwl_bt_ack_kill_msk[BT_KILL_MSK_DEFAULT]); cmd.kill_cts_msk = cpu_to_le32(iwl_bt_cts_kill_msk[BT_KILL_MSK_DEFAULT]); memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif)); /* go to CALIB state in internal BT-Coex state machine */ ret = iwl_send_bt_env(mvm, BT_COEX_ENV_OPEN, BT_COEX_PRIO_TBL_EVT_INIT_CALIB2); if (ret) return ret; ret = iwl_send_bt_env(mvm, BT_COEX_ENV_CLOSE, BT_COEX_PRIO_TBL_EVT_INIT_CALIB2); if (ret) return ret; return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, CMD_SYNC, sizeof(cmd), &cmd); } static int iwl_mvm_bt_udpate_ctrl_kill_msk(struct iwl_mvm *mvm, bool reduced_tx_power) { enum iwl_bt_kill_msk bt_kill_msk; struct iwl_bt_coex_cmd cmd = {}; struct iwl_bt_coex_profile_notif *notif = &mvm->last_bt_notif; lockdep_assert_held(&mvm->mutex); if (reduced_tx_power) { /* Reduced Tx power has precedence on the type of the profile */ bt_kill_msk = BT_KILL_MSK_REDUCED_TXPOW; } else { /* Low latency BT profile is active: give higher prio to BT */ if (BT_MBOX_MSG(notif, 3, SCO_STATE) || BT_MBOX_MSG(notif, 3, A2DP_STATE) || BT_MBOX_MSG(notif, 3, SNIFF_STATE)) bt_kill_msk = BT_KILL_MSK_SCO_HID_A2DP; else bt_kill_msk = BT_KILL_MSK_DEFAULT; } IWL_DEBUG_COEX(mvm, "Update kill_msk: %d - SCO %sactive A2DP %sactive SNIFF %sactive\n", bt_kill_msk, BT_MBOX_MSG(notif, 3, SCO_STATE) ? "" : "in", BT_MBOX_MSG(notif, 3, A2DP_STATE) ? "" : "in", BT_MBOX_MSG(notif, 3, SNIFF_STATE) ? "" : "in"); /* Don't send HCMD if there is no update */ if (bt_kill_msk == mvm->bt_kill_msk) return 0; mvm->bt_kill_msk = bt_kill_msk; cmd.kill_ack_msk = cpu_to_le32(iwl_bt_ack_kill_msk[bt_kill_msk]); cmd.kill_cts_msk = cpu_to_le32(iwl_bt_cts_kill_msk[bt_kill_msk]); cmd.valid_bit_msk = cpu_to_le16(BT_VALID_KILL_ACK | BT_VALID_KILL_CTS); IWL_DEBUG_COEX(mvm, "bt_kill_msk = %d\n", bt_kill_msk); return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, CMD_SYNC, sizeof(cmd), &cmd); } static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id, bool enable) { struct iwl_bt_coex_cmd cmd = { .valid_bit_msk = cpu_to_le16(BT_VALID_REDUCED_TX_POWER), .bt_reduced_tx_power = sta_id, }; struct ieee80211_sta *sta; struct iwl_mvm_sta *mvmsta; /* This can happen if the station has been removed right now */ if (sta_id == IWL_MVM_STATION_COUNT) return 0; sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], lockdep_is_held(&mvm->mutex)); mvmsta = (void *)sta->drv_priv; /* nothing to do */ if (mvmsta->bt_reduced_txpower == enable) return 0; if (enable) cmd.bt_reduced_tx_power |= BT_REDUCED_TX_POWER_BIT; IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n", enable ? "en" : "dis", sta_id); mvmsta->bt_reduced_txpower = enable; /* Send ASYNC since this can be sent from an atomic context */ return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, CMD_ASYNC, sizeof(cmd), &cmd); } struct iwl_bt_iterator_data { struct iwl_bt_coex_profile_notif *notif; struct iwl_mvm *mvm; u32 num_bss_ifaces; bool reduced_tx_power; }; static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_bt_iterator_data *data = _data; struct iwl_mvm *mvm = data->mvm; struct ieee80211_chanctx_conf *chanctx_conf; enum ieee80211_smps_mode smps_mode; enum ieee80211_band band; int ave_rssi; if (vif->type != NL80211_IFTYPE_STATION) return; rcu_read_lock(); chanctx_conf = rcu_dereference(vif->chanctx_conf); if (chanctx_conf && chanctx_conf->def.chan) band = chanctx_conf->def.chan->band; else band = -1; rcu_read_unlock(); smps_mode = IEEE80211_SMPS_AUTOMATIC; if (band != IEEE80211_BAND_2GHZ) { ieee80211_request_smps(vif, smps_mode); return; } if (data->notif->bt_status) smps_mode = IEEE80211_SMPS_DYNAMIC; if (data->notif->bt_traffic_load >= IWL_BT_LOAD_FORCE_SISO_THRESHOLD) smps_mode = IEEE80211_SMPS_STATIC; IWL_DEBUG_COEX(data->mvm, "mac %d: bt_status %d traffic_load %d smps_req %d\n", mvmvif->id, data->notif->bt_status, data->notif->bt_traffic_load, smps_mode); ieee80211_request_smps(vif, smps_mode); /* don't reduce the Tx power if in loose scheme */ if (is_loose_coex()) return; data->num_bss_ifaces++; /* reduced Txpower only if there are open BT connections, so ...*/ if (!BT_MBOX_MSG(data->notif, 3, OPEN_CON_2)) { /* ... cancel reduced Tx power ... */ if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false)) IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n"); data->reduced_tx_power = false; /* ... and there is no need to get reports on RSSI any more. */ ieee80211_disable_rssi_reports(vif); return; } ave_rssi = ieee80211_ave_rssi(vif); /* if the RSSI isn't valid, fake it is very low */ if (!ave_rssi) ave_rssi = -100; if (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) { if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true)) IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n"); /* * bt_kill_msk can be BT_KILL_MSK_REDUCED_TXPOW only if all the * BSS / P2P clients have rssi above threshold. * We set the bt_kill_msk to BT_KILL_MSK_REDUCED_TXPOW before * the iteration, if one interface's rssi isn't good enough, * bt_kill_msk will be set to default values. */ } else if (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) { if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false)) IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n"); /* * One interface hasn't rssi above threshold, bt_kill_msk must * be set to default values. */ data->reduced_tx_power = false; } /* Begin to monitor the RSSI: it may influence the reduced Tx power */ ieee80211_enable_rssi_reports(vif, BT_DISABLE_REDUCED_TXPOWER_THRESHOLD, BT_ENABLE_REDUCED_TXPOWER_THRESHOLD); } static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm) { struct iwl_bt_iterator_data data = { .mvm = mvm, .notif = &mvm->last_bt_notif, .reduced_tx_power = true, }; ieee80211_iterate_active_interfaces_atomic( mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_bt_notif_iterator, &data); /* * If there are no BSS / P2P client interfaces, reduced Tx Power is * irrelevant since it is based on the RSSI coming from the beacon. * Use BT_KILL_MSK_DEFAULT in that case. */ data.reduced_tx_power = data.reduced_tx_power && data.num_bss_ifaces; if (iwl_mvm_bt_udpate_ctrl_kill_msk(mvm, data.reduced_tx_power)) IWL_ERR(mvm, "Failed to update the ctrl_kill_msk\n"); } /* upon association, the fw will send in BT Coex notification */ int iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *dev_cmd) { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data; IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n"); IWL_DEBUG_COEX(mvm, "\tBT %salive\n", notif->bt_status ? "" : "not "); IWL_DEBUG_COEX(mvm, "\tBT open conn %d\n", notif->bt_open_conn); IWL_DEBUG_COEX(mvm, "\tBT traffic load %d\n", notif->bt_traffic_load); IWL_DEBUG_COEX(mvm, "\tBT agg traffic load %d\n", notif->bt_agg_traffic_load); IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance); /* remember this notification for future use: rssi fluctuations */ memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif)); iwl_mvm_bt_coex_notif_handle(mvm); /* * This is an async handler for a notification, returning anything other * than 0 doesn't make sense even if HCMD failed. */ return 0; } static void iwl_mvm_bt_rssi_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv; struct iwl_bt_iterator_data *data = _data; struct iwl_mvm *mvm = data->mvm; struct ieee80211_sta *sta; struct iwl_mvm_sta *mvmsta; if (vif->type != NL80211_IFTYPE_STATION || mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) return; sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], lockdep_is_held(&mvm->mutex)); mvmsta = (void *)sta->drv_priv; /* * This interface doesn't support reduced Tx power (because of low * RSSI probably), then set bt_kill_msk to default values. */ if (!mvmsta->bt_reduced_txpower) data->reduced_tx_power = false; /* else - possibly leave it to BT_KILL_MSK_REDUCED_TXPOW */ } void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif, enum ieee80211_rssi_event rssi_event) { struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv; struct iwl_bt_iterator_data data = { .mvm = mvm, .reduced_tx_power = true, }; int ret; mutex_lock(&mvm->mutex); /* * Rssi update while not associated - can happen since the statistics * are handled asynchronously */ if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) goto out_unlock; /* No open connection - reports should be disabled */ if (!BT_MBOX_MSG(&mvm->last_bt_notif, 3, OPEN_CON_2)) goto out_unlock; IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid, rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW"); /* * Check if rssi is good enough for reduced Tx power, but not in loose * scheme. */ if (rssi_event == RSSI_EVENT_LOW || is_loose_coex()) ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false); else ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true); if (ret) IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n"); ieee80211_iterate_active_interfaces_atomic( mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_bt_rssi_iterator, &data); /* * If there are no BSS / P2P client interfaces, reduced Tx Power is * irrelevant since it is based on the RSSI coming from the beacon. * Use BT_KILL_MSK_DEFAULT in that case. */ data.reduced_tx_power = data.reduced_tx_power && data.num_bss_ifaces; if (iwl_mvm_bt_udpate_ctrl_kill_msk(mvm, data.reduced_tx_power)) IWL_ERR(mvm, "Failed to update the ctrl_kill_msk\n"); out_unlock: mutex_unlock(&mvm->mutex); } void iwl_mvm_bt_coex_vif_assoc(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct ieee80211_chanctx_conf *chanctx_conf; enum ieee80211_band band; rcu_read_lock(); chanctx_conf = rcu_dereference(vif->chanctx_conf); if (chanctx_conf && chanctx_conf->def.chan) band = chanctx_conf->def.chan->band; else band = -1; rcu_read_unlock(); /* if we are in 2GHz we will get a notification from the fw */ if (band == IEEE80211_BAND_2GHZ) return; /* else, we can remove all the constraints */ memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif)); iwl_mvm_bt_coex_notif_handle(mvm); }