diff options
author | Miri Korenblit <miriam.rachel.korenblit@intel.com> | 2024-01-31 23:56:32 +0300 |
---|---|---|
committer | Johannes Berg <johannes.berg@intel.com> | 2024-02-02 15:46:28 +0300 |
commit | 10159a45666bf127afe8d7c654351d542e7fcb42 (patch) | |
tree | d1e2bd8d67af7135f4bcd4b03c1aa02050d1c063 | |
parent | 17903a283593c1dbf9da041f836004163ca30f7b (diff) | |
download | linux-10159a45666bf127afe8d7c654351d542e7fcb42.tar.xz |
wifi: iwlwifi: disable eSR when BT is active
eSR should be disabled when BT Coex is active and:
- LB link is the primary link.
- LB link is the secondary link and the predicted BT penalty
(the wifi loss rate caused by BT interference) is higher
than a given threshold.
If one of the conditions above is no longer true then re-enable eSR.
In order to implement this, add support for version 5 of
BT_PROFILE_NOTIFICATION, in which the bt penalty is provided
by FW.
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20240131225342.b922b6485af8.I7d808ce535a7372aca9cb85c045755e6788a4904@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/api/coex.h | 14 | ||||
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/coex.c | 124 | ||||
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/constants.h | 3 | ||||
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c | 107 | ||||
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 21 | ||||
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 5 | ||||
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/rx.c | 13 |
7 files changed, 275 insertions, 12 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/coex.h b/drivers/net/wireless/intel/iwlwifi/fw/api/coex.h index 3e81e9369224..bc27e15488f5 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/api/coex.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/api/coex.h @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ /* + * Copyright (C) 2023 Intel Corporation * Copyright (C) 2013-2014, 2018-2019 Intel Corporation * Copyright (C) 2013-2014 Intel Mobile Communications GmbH * Copyright (C) 2017 Intel Deutschland GmbH @@ -170,7 +171,11 @@ enum iwl_bt_ci_compliance { * @bt_activity_grading: the activity of BT &enum iwl_bt_activity_grading * @ttc_status: is TTC enabled - one bit per PHY * @rrc_status: is RRC enabled - one bit per PHY - * @reserved: reserved + * The following fields are only for version 5, and are reserved in version 4: + * @wifi_loss_low_rssi: The predicted lost WiFi rate (% of air time that BT is + * utilizing) when the RSSI is low (<= -65 dBm) + * @wifi_loss_mid_high_rssi: The predicted lost WiFi rate (% of air time that + * BT is utilizing) when the RSSI is mid/high (>= -65 dBm) */ struct iwl_bt_coex_profile_notif { __le32 mbox_msg[4]; @@ -182,7 +187,10 @@ struct iwl_bt_coex_profile_notif { __le32 bt_activity_grading; u8 ttc_status; u8 rrc_status; - __le16 reserved; -} __packed; /* BT_COEX_PROFILE_NTFY_API_S_VER_4 */ + u8 wifi_loss_low_rssi; + u8 wifi_loss_mid_high_rssi; +} __packed; /* BT_COEX_PROFILE_NTFY_API_S_VER_4 + * BT_COEX_PROFILE_NTFY_API_S_VER_5 + */ #endif /* __iwl_fw_api_coex_h__ */ diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/coex.c b/drivers/net/wireless/intel/iwlwifi/mvm/coex.c index 9fe1761691ec..d26075e3e6ad 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/coex.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/coex.c @@ -252,6 +252,124 @@ static void iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm *mvm, swap(data->primary, data->secondary); } +static void iwl_mvm_bt_coex_enable_esr(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, bool enable) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + int link_id; + + lockdep_assert_held(&mvm->mutex); + + if (!vif->cfg.assoc || !ieee80211_vif_is_mld(vif)) + return; + + /* Done already */ + if (mvmvif->bt_coex_esr_disabled == !enable) + return; + + mvmvif->bt_coex_esr_disabled = !enable; + + /* Nothing to do */ + if (mvmvif->esr_active == enable) + return; + + if (enable) { + /* Try to re-enable eSR*/ + iwl_mvm_mld_select_links(mvm, vif, false); + return; + } + + /* + * Find the primary link, as we want to switch to it and drop the + * secondary one. + */ + link_id = iwl_mvm_mld_get_primary_link(mvm, vif, vif->active_links); + WARN_ON(link_id < 0); + + ieee80211_set_active_links_async(vif, + vif->active_links & BIT(link_id)); +} + +/* + * This function receives the LB link id and checks if eSR should be + * enabled or disabled (due to BT coex) + */ +bool +iwl_mvm_bt_coex_calculate_esr_mode(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + int link_id, int primary_link) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id]; + bool have_wifi_loss_rate = + iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, + BT_PROFILE_NOTIFICATION, 0) > 4; + s8 link_rssi = 0; + u8 wifi_loss_rate; + + lockdep_assert_held(&mvm->mutex); + + if (mvm->last_bt_notif.wifi_loss_low_rssi == BT_OFF) + return true; + + /* If LB link is the primary one we should always disable eSR */ + if (link_id == primary_link) + return false; + + /* The feature is not supported */ + if (!have_wifi_loss_rate) + return true; + + /* + * We might not have a link_info when checking whether we can + * (re)enable eSR - the LB link might not exist yet + */ + if (link_info) + link_rssi = (s8)link_info->beacon_stats.avg_signal; + + /* + * In case we don't know the RSSI - take the lower wifi loss, + * so we will more likely enter eSR, and if RSSI is low - + * we will get an update on this and exit eSR. + */ + if (!link_rssi) + wifi_loss_rate = mvm->last_bt_notif.wifi_loss_mid_high_rssi; + + else if (!mvmvif->bt_coex_esr_disabled) + /* RSSI needs to get really low to disable eSR... */ + wifi_loss_rate = + link_rssi <= -IWL_MVM_BT_COEX_DISABLE_ESR_THRESH ? + mvm->last_bt_notif.wifi_loss_low_rssi : + mvm->last_bt_notif.wifi_loss_mid_high_rssi; + else + /* ...And really high before we enable it back */ + wifi_loss_rate = + link_rssi <= -IWL_MVM_BT_COEX_ENABLE_ESR_THRESH ? + mvm->last_bt_notif.wifi_loss_low_rssi : + mvm->last_bt_notif.wifi_loss_mid_high_rssi; + + return wifi_loss_rate <= IWL_MVM_BT_COEX_WIFI_LOSS_THRESH; +} + +void iwl_mvm_bt_coex_update_vif_esr(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + int link_id) +{ + unsigned long usable_links = ieee80211_vif_usable_links(vif); + int primary_link = iwl_mvm_mld_get_primary_link(mvm, vif, + usable_links); + bool enable; + + /* Not assoc, not MLD vif or only one usable link */ + if (primary_link < 0) + return; + + enable = iwl_mvm_bt_coex_calculate_esr_mode(mvm, vif, link_id, + primary_link); + + iwl_mvm_bt_coex_enable_esr(mvm, vif, enable); +} + static void iwl_mvm_bt_notif_per_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_bt_iterator_data *data, @@ -297,6 +415,8 @@ static void iwl_mvm_bt_notif_per_link(struct iwl_mvm *mvm, return; } + iwl_mvm_bt_coex_update_vif_esr(mvm, vif, link_id); + if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2)) min_ag_for_static_smps = BT_VERY_HIGH_TRAFFIC; else @@ -432,6 +552,10 @@ static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac, return; } + /* When BT is off this will be 0 */ + if (data->notif->wifi_loss_low_rssi == BT_OFF) + iwl_mvm_bt_coex_enable_esr(mvm, vif, true); + for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) iwl_mvm_bt_notif_per_link(mvm, vif, data, link_id); } diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/constants.h b/drivers/net/wireless/intel/iwlwifi/mvm/constants.h index c832068b5718..f5122c4678a1 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/constants.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/constants.h @@ -11,6 +11,9 @@ #include "fw-api.h" #define IWL_MVM_UAPSD_NOAGG_BSSIDS_NUM 20 +#define IWL_MVM_BT_COEX_DISABLE_ESR_THRESH 69 +#define IWL_MVM_BT_COEX_ENABLE_ESR_THRESH 63 +#define IWL_MVM_BT_COEX_WIFI_LOSS_THRESH 0 #define IWL_MVM_DEFAULT_PS_TX_DATA_TIMEOUT (100 * USEC_PER_MSEC) #define IWL_MVM_DEFAULT_PS_RX_DATA_TIMEOUT (100 * USEC_PER_MSEC) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c index 449229ced3bb..2b879eeecc8c 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c @@ -603,6 +603,7 @@ static int iwl_mvm_mld_mac_sta_state(struct ieee80211_hw *hw, struct iwl_mvm_link_sel_data { u8 link_id; enum nl80211_band band; + enum nl80211_chan_width width; bool active; }; @@ -655,6 +656,7 @@ void iwl_mvm_mld_select_links(struct iwl_mvm *mvm, struct ieee80211_vif *vif, data[n_data].link_id = link_id; data[n_data].band = link_conf->chandef.chan->band; + data[n_data].width = link_conf->chandef.width; data[n_data].active = vif->active_links & BIT(link_id); n_data++; } @@ -1215,13 +1217,116 @@ iwl_mvm_mld_change_sta_links(struct ieee80211_hw *hw, return ret; } +/* + * This function receives a subset of the usable links bitmap and + * returns the primary link id, and -1 if such link doesn't exist + * (e.g. non-MLO connection) or wasn't found. + */ +int iwl_mvm_mld_get_primary_link(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + unsigned long usable_links) +{ + struct iwl_mvm_link_sel_data data[IEEE80211_MLD_MAX_NUM_LINKS]; + u8 link_id, n_data = 0; + + if (!ieee80211_vif_is_mld(vif) || !vif->cfg.assoc) + return -1; + + for_each_set_bit(link_id, &usable_links, IEEE80211_MLD_MAX_NUM_LINKS) { + struct ieee80211_bss_conf *link_conf = + link_conf_dereference_protected(vif, link_id); + + if (WARN_ON_ONCE(!link_conf)) + continue; + + data[n_data].link_id = link_id; + data[n_data].band = link_conf->chandef.chan->band; + data[n_data].width = link_conf->chandef.width; + data[n_data].active = true; + n_data++; + } + + if (n_data <= 1) + return -1; + + /* The logic should be modified to handle more than 2 links */ + WARN_ON_ONCE(n_data > 2); + + /* Primary link is the link with the wider bandwidth or higher band */ + if (data[0].width > data[1].width) + return data[0].link_id; + if (data[0].width < data[1].width) + return data[1].link_id; + if (data[0].band >= data[1].band) + return data[0].link_id; + + return data[1].link_id; +} + +/* + * This function receives a bitmap of usable links and check if we can enter + * eSR on those links. + */ +static bool iwl_mvm_can_enter_esr(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + unsigned long desired_links) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + int primary_link = iwl_mvm_mld_get_primary_link(mvm, vif, + desired_links); + bool ret = true; + int link_id; + + if (primary_link < 0) + return false; + + for_each_set_bit(link_id, &desired_links, IEEE80211_MLD_MAX_NUM_LINKS) { + struct ieee80211_bss_conf *link_conf = + link_conf_dereference_protected(vif, link_id); + + if (WARN_ON_ONCE(!link_conf)) + continue; + + /* BT Coex effects eSR mode only if one of the link is on LB */ + if (link_conf->chandef.chan->band != NL80211_BAND_2GHZ) + continue; + + ret = iwl_mvm_bt_coex_calculate_esr_mode(mvm, vif, link_id, + primary_link); + // Mark eSR as disabled for the next time + if (!ret) + mvmvif->bt_coex_esr_disabled = true; + break; + } + + return ret; +} + static bool iwl_mvm_mld_can_activate_links(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 desired_links) { struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int n_links = hweight16(desired_links); + bool ret = true; + + if (n_links <= 1) + return true; - return hweight16(desired_links) <= iwl_mvm_max_active_links(mvm, vif); + mutex_lock(&mvm->mutex); + + /* Check if HW supports the wanted number of links */ + if (n_links > iwl_mvm_max_active_links(mvm, vif)) { + ret = false; + goto unlock; + } + + /* If it is an eSR device, check that we can enter eSR */ + if (iwl_mvm_is_esr_supported(mvm->fwrt.trans)) + ret = iwl_mvm_can_enter_esr(mvm, vif, desired_links); +unlock: + mutex_unlock(&mvm->mutex); + return ret; } const struct ieee80211_ops iwl_mvm_mld_hw_ops = { diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h index af5c8b4bb5a6..9a89b91519db 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h @@ -359,6 +359,7 @@ struct iwl_mvm_vif_link_info { * @pm_enabled - indicate if MAC power management is allowed * @monitor_active: indicates that monitor context is configured, and that the * interface should get quota etc. + * @bt_coex_esr_disabled: indicates if esr is disabled due to bt coex * @low_latency: bit flags for low latency * see enum &iwl_mvm_low_latency_cause for causes. * @low_latency_actual: boolean, indicates low latency is set, @@ -389,6 +390,7 @@ struct iwl_mvm_vif { bool pm_enabled; bool monitor_active; bool esr_active; + bool bt_coex_esr_disabled; u8 low_latency: 6; u8 low_latency_actual: 1; @@ -1570,13 +1572,17 @@ static inline int iwl_mvm_max_active_links(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_trans *trans = mvm->fwrt.trans; + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + lockdep_assert_held(&mvm->mutex); if (vif->type == NL80211_IFTYPE_AP) return mvm->fw->ucode_capa.num_beacons; - if (iwl_mvm_is_esr_supported(trans) || - (CSR_HW_RFID_TYPE(trans->hw_rf_id) == IWL_CFG_RF_TYPE_FM && - CSR_HW_RFID_IS_CDB(trans->hw_rf_id))) + if ((iwl_mvm_is_esr_supported(trans) && + !mvmvif->bt_coex_esr_disabled) || + ((CSR_HW_RFID_TYPE(trans->hw_rf_id) == IWL_CFG_RF_TYPE_FM && + CSR_HW_RFID_IS_CDB(trans->hw_rf_id)))) return IWL_MVM_FW_MAX_ACTIVE_LINKS_NUM; return 1; @@ -2119,6 +2125,12 @@ bool iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm *mvm, u8 iwl_mvm_bt_coex_get_single_ant_msk(struct iwl_mvm *mvm, u8 enabled_ants); u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, struct ieee80211_tx_info *info, u8 ac); +bool iwl_mvm_bt_coex_calculate_esr_mode(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + int link_id, int primary_link); +void iwl_mvm_bt_coex_update_vif_esr(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + int link_id); /* beacon filtering */ #ifdef CONFIG_IWLWIFI_DEBUGFS @@ -2733,4 +2745,7 @@ bool iwl_mvm_enable_fils(struct iwl_mvm *mvm, struct ieee80211_chanctx_conf *ctx); void iwl_mvm_mld_select_links(struct iwl_mvm *mvm, struct ieee80211_vif *vif, bool valid_links_changed); +int iwl_mvm_mld_get_primary_link(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + unsigned long usable_links); #endif /* __IWL_MVM_H__ */ diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index 38a84a54ff78..871274eea26f 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -320,7 +320,8 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = { struct iwl_tlc_update_notif), RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, - RX_HANDLER_ASYNC_LOCKED, struct iwl_bt_coex_profile_notif), + RX_HANDLER_ASYNC_LOCKED_WIPHY, + struct iwl_bt_coex_profile_notif), RX_HANDLER_NO_SIZE(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, RX_HANDLER_ASYNC_LOCKED), RX_HANDLER_NO_SIZE(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, @@ -328,7 +329,7 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = { RX_HANDLER_GRP(STATISTICS_GROUP, STATISTICS_OPER_NOTIF, iwl_mvm_handle_rx_system_oper_stats, - RX_HANDLER_ASYNC_LOCKED, + RX_HANDLER_ASYNC_LOCKED_WIPHY, struct iwl_system_statistics_notif_oper), RX_HANDLER_GRP(STATISTICS_GROUP, STATISTICS_OPER_PART1_NOTIF, iwl_mvm_handle_rx_system_oper_part1_stats, diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rx.c b/drivers/net/wireless/intel/iwlwifi/mvm/rx.c index 8caa971770c6..72df41996464 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rx.c @@ -841,6 +841,7 @@ iwl_mvm_stat_iterator_all_links(struct iwl_mvm *mvm, struct iwl_stats_ntfy_per_link *link_stats; struct ieee80211_bss_conf *bss_conf; struct iwl_mvm_vif *mvmvif; + struct iwl_mvm_vif_link_info *link_info; int link_id; int sig; @@ -857,20 +858,26 @@ iwl_mvm_stat_iterator_all_links(struct iwl_mvm *mvm, continue; mvmvif = iwl_mvm_vif_from_mac80211(bss_conf->vif); - if (!mvmvif || !mvmvif->link[link_id]) + link_info = mvmvif->link[link_id]; + if (!link_info) continue; link_stats = &per_link[fw_link_id]; - mvmvif->link[link_id]->beacon_stats.num_beacons = + link_info->beacon_stats.num_beacons = le32_to_cpu(link_stats->beacon_counter); /* we basically just use the u8 to store 8 bits and then treat * it as a s8 whenever we take it out to a different type. */ - mvmvif->link[link_id]->beacon_stats.avg_signal = + link_info->beacon_stats.avg_signal = -le32_to_cpu(link_stats->beacon_average_energy); + if (link_info->phy_ctxt && + link_info->phy_ctxt->channel->band == NL80211_BAND_2GHZ) + iwl_mvm_bt_coex_update_vif_esr(mvm, bss_conf->vif, + link_id); + /* make sure that beacon statistics don't go backwards with TCM * request to clear statistics */ |