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04 May 2024 23:20:11 -0700 From: Miri Korenblit To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Johannes Berg Subject: [PATCH 01/15] wifi: iwlwifi: cleanup EMLSR when BT is active handling Date: Sun, 5 May 2024 09:19:45 +0300 Message-Id: <20240505091420.a2e93b67c895.I183a0039ef076613144648cc46fbe9ab3d47c574@changeid> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240505061959.825245-1-miriam.rachel.korenblit@intel.com> References: <20240505061959.825245-1-miriam.rachel.korenblit@intel.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Organization: Intel Israel (74) Limited Content-Transfer-Encoding: 8bit BT Coex disables EMLSR only for a 2.4 GHz link, but doesn't block the vif from using EMLSR with a different link pair. In addition, storing it in mvmvif:disable_esr_reason requires extracting the BT Coex bit before checking if EMLSR is blocked or not for a specific vif. Therefore, change the BT Coex bit to be an exit reason and not a blocker. On link selection, EMLSR mode will be re-calculated for the 2.4 GHz link instead of checking that bit. While at it, move the relevant function declarations to the EMLSR functions area in mvm.h Signed-off-by: Miri Korenblit Reviewed-by: Johannes Berg --- drivers/net/wireless/intel/iwlwifi/mvm/coex.c | 42 +++++++------------ drivers/net/wireless/intel/iwlwifi/mvm/link.c | 13 +++--- .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 20 --------- .../wireless/intel/iwlwifi/mvm/mld-mac80211.c | 2 +- drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 21 ++++++---- .../wireless/intel/iwlwifi/mvm/tests/links.c | 21 ++++++++-- 6 files changed, 53 insertions(+), 66 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/coex.c b/drivers/net/wireless/intel/iwlwifi/mvm/coex.c index c7987676335a..ad3e14a0d043 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/coex.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/coex.c @@ -257,38 +257,28 @@ static void iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm *mvm, * This function receives the LB link id and checks if eSR should be * enabled or disabled (due to BT coex) */ -static bool +bool iwl_mvm_bt_coex_calculate_esr_mode(struct iwl_mvm *mvm, struct ieee80211_vif *vif, - int link_id) + s32 link_rssi, + bool primary) { 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 == iwl_mvm_get_primary_link(vif)) + if (primary) 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, @@ -298,7 +288,7 @@ iwl_mvm_bt_coex_calculate_esr_mode(struct iwl_mvm *mvm, if (!link_rssi) wifi_loss_rate = mvm->last_bt_notif.wifi_loss_mid_high_rssi; - else if (!(mvmvif->esr_disable_reason & IWL_MVM_ESR_BLOCKED_COEX)) + else if (mvmvif->esr_active) /* RSSI needs to get really low to disable eSR... */ wifi_loss_rate = link_rssi <= -IWL_MVM_BT_COEX_DISABLE_ESR_THRESH ? @@ -318,20 +308,20 @@ void iwl_mvm_bt_coex_update_link_esr(struct iwl_mvm *mvm, struct ieee80211_vif *vif, int link_id) { - bool enable; + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_vif_link_info *link = mvmvif->link[link_id]; if (!ieee80211_vif_is_mld(vif) || - !iwl_mvm_vif_from_mac80211(vif)->authorized) + !iwl_mvm_vif_from_mac80211(vif)->authorized || + WARN_ON(!link)) return; - enable = iwl_mvm_bt_coex_calculate_esr_mode(mvm, vif, link_id); - - if (enable) - iwl_mvm_unblock_esr(mvm, vif, IWL_MVM_ESR_BLOCKED_COEX); - else + if (!iwl_mvm_bt_coex_calculate_esr_mode(mvm, vif, + (s8)link->beacon_stats.avg_signal, + link_id == iwl_mvm_get_primary_link(vif))) /* In case we decided to exit eSR - stay with the primary */ - iwl_mvm_block_esr(mvm, vif, IWL_MVM_ESR_BLOCKED_COEX, - iwl_mvm_get_primary_link(vif)); + iwl_mvm_exit_esr(mvm, vif, IWL_MVM_ESR_EXIT_COEX, + iwl_mvm_get_primary_link(vif)); } static void iwl_mvm_bt_notif_per_link(struct iwl_mvm *mvm, @@ -515,10 +505,6 @@ 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_unblock_esr(mvm, vif, IWL_MVM_ESR_BLOCKED_COEX); - 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/link.c b/drivers/net/wireless/intel/iwlwifi/mvm/link.c index 84b497b22d83..733e1f77c171 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/link.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/link.c @@ -592,7 +592,8 @@ s8 iwl_mvm_get_esr_rssi_thresh(struct iwl_mvm *mvm, static u32 iwl_mvm_esr_disallowed_with_link(struct ieee80211_vif *vif, - const struct iwl_mvm_link_sel_data *link) + const struct iwl_mvm_link_sel_data *link, + bool primary) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm *mvm = mvmvif->mvm; @@ -601,8 +602,10 @@ iwl_mvm_esr_disallowed_with_link(struct ieee80211_vif *vif, /* BT Coex effects eSR mode only if one of the links is on LB */ if (link->chandef->chan->band == NL80211_BAND_2GHZ && - mvmvif->esr_disable_reason & IWL_MVM_ESR_BLOCKED_COEX) - ret |= IWL_MVM_ESR_BLOCKED_COEX; + (!iwl_mvm_bt_coex_calculate_esr_mode(mvm, vif, link->signal, + primary))) + ret |= IWL_MVM_ESR_EXIT_COEX; + thresh = iwl_mvm_get_esr_rssi_thresh(mvm, link->chandef, false); @@ -622,8 +625,8 @@ bool iwl_mvm_mld_valid_link_pair(struct ieee80211_vif *vif, const struct iwl_mvm_link_sel_data *b) { /* Per-link considerations */ - if (iwl_mvm_esr_disallowed_with_link(vif, a) || - iwl_mvm_esr_disallowed_with_link(vif, b)) + if (iwl_mvm_esr_disallowed_with_link(vif, a, true) || + iwl_mvm_esr_disallowed_with_link(vif, b, false)) return false; /* Per-combination considerations */ diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index c631de70253d..eab40211404f 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -3877,23 +3877,6 @@ iwl_mvm_sta_state_auth_to_assoc(struct ieee80211_hw *hw, return callbacks->update_sta(mvm, vif, sta); } -static void iwl_mvm_bt_coex_update_vif_esr(struct iwl_mvm *mvm, - struct ieee80211_vif *vif) -{ - unsigned long usable_links = ieee80211_vif_usable_links(vif); - u8 link_id; - - 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)) - return; - - if (link_conf->chanreq.oper.chan->band == NL80211_BAND_2GHZ) - iwl_mvm_bt_coex_update_link_esr(mvm, vif, link_id); - } -} static int iwl_mvm_sta_state_assoc_to_authorized(struct iwl_mvm *mvm, @@ -3928,9 +3911,6 @@ iwl_mvm_sta_state_assoc_to_authorized(struct iwl_mvm *mvm, memset(&mvmvif->last_esr_exit, 0, sizeof(mvmvif->last_esr_exit)); - /* Calculate eSR mode due to BT coex */ - iwl_mvm_bt_coex_update_vif_esr(mvm, vif); - /* when client is authorized (AP station marked as such), * try to enable the best link(s). */ diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c index 986176d94210..e16f1eee8473 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c @@ -1180,7 +1180,7 @@ bool iwl_mvm_esr_allowed_on_vif(struct iwl_mvm *mvm, !(ext_capa->eml_capabilities & IEEE80211_EML_CAP_EMLSR_SUPP)) return false; - return !(mvmvif->esr_disable_reason & ~IWL_MVM_ESR_BLOCKED_COEX); + return !mvmvif->esr_disable_reason; } static bool iwl_mvm_mld_can_activate_links(struct ieee80211_hw *hw, diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h index 421c927ec960..309711532042 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h @@ -353,20 +353,21 @@ struct iwl_mvm_vif_link_info { * For the blocking reasons - use iwl_mvm_(un)block_esr(), and for the exit * reasons - use iwl_mvm_exit_esr(). * - * @IWL_MVM_ESR_BLOCKED_COEX: COEX is preventing the enablement of EMLSR * @IWL_MVM_ESR_BLOCKED_PREVENTION: Prevent EMLSR to avoid entering and exiting * in a loop. * @IWL_MVM_ESR_BLOCKED_WOWLAN: WOWLAN is preventing the enablement of EMLSR * @IWL_MVM_ESR_EXIT_MISSED_BEACON: exited EMLSR due to missed beacons * @IWL_MVM_ESR_EXIT_LOW_RSSI: link is deactivated/not allowed for EMLSR * due to low RSSI. + * @IWL_MVM_ESR_EXIT_COEX: link is deactivated/not allowed for EMLSR + * due to BT Coex. */ enum iwl_mvm_esr_state { - IWL_MVM_ESR_BLOCKED_COEX = 0x1, - IWL_MVM_ESR_BLOCKED_PREVENTION = 0x2, - IWL_MVM_ESR_BLOCKED_WOWLAN = 0x4, + IWL_MVM_ESR_BLOCKED_PREVENTION = 0x1, + IWL_MVM_ESR_BLOCKED_WOWLAN = 0x2, IWL_MVM_ESR_EXIT_MISSED_BEACON = 0x10000, IWL_MVM_ESR_EXIT_LOW_RSSI = 0x20000, + IWL_MVM_ESR_EXIT_COEX = 0x40000, }; #define IWL_MVM_BLOCK_ESR_REASONS 0xffff @@ -2221,9 +2222,6 @@ 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); -void iwl_mvm_bt_coex_update_link_esr(struct iwl_mvm *mvm, - struct ieee80211_vif *vif, - int link_id); /* beacon filtering */ #ifdef CONFIG_IWLWIFI_DEBUGFS @@ -2888,5 +2886,12 @@ void iwl_mvm_exit_esr(struct iwl_mvm *mvm, struct ieee80211_vif *vif, s8 iwl_mvm_get_esr_rssi_thresh(struct iwl_mvm *mvm, const struct cfg80211_chan_def *chandef, bool low); - +void iwl_mvm_bt_coex_update_link_esr(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + int link_id); +bool +iwl_mvm_bt_coex_calculate_esr_mode(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + s32 link_rssi, + bool primary); #endif /* __IWL_MVM_H__ */ diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tests/links.c b/drivers/net/wireless/intel/iwlwifi/mvm/tests/links.c index 7446e0c168ee..217dbb823691 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tests/links.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tests/links.c @@ -37,7 +37,20 @@ static struct cfg80211_bss bss = {}; static struct ieee80211_bss_conf link_conf = {.bss = &bss}; -static struct iwl_mvm mvm = {}; +static const struct iwl_fw_cmd_version entry = { + .group = LEGACY_GROUP, + .cmd = BT_PROFILE_NOTIFICATION, + .notif_ver = 4 +}; + +static struct iwl_fw fw = { + .ucode_capa = { + .n_cmd_versions = 1, + .cmd_versions = &entry, + }, +}; + +static struct iwl_mvm mvm = {.fw = &fw}; static const struct link_grading_case { const char *desc; @@ -217,7 +230,7 @@ kunit_test_suite(link_grading); static const struct valid_link_pair_case { const char *desc; - u32 esr_disable_reason; + bool bt; struct ieee80211_channel *chan_a; struct ieee80211_channel *chan_b; enum nl80211_chan_width cw_a; @@ -240,7 +253,7 @@ static const struct valid_link_pair_case { }, { .desc = "LB + HB, with BT.", - .esr_disable_reason = 0x1, + .bt = true, .chan_a = &chan_2ghz, .chan_b = &chan_5ghz, .valid = false, @@ -370,7 +383,7 @@ static void test_valid_link_pair(struct kunit *test) #endif mvm.trans = trans; - mvmvif->esr_disable_reason = params->esr_disable_reason; + mvm.last_bt_notif.wifi_loss_low_rssi = params->bt; mvmvif->mvm = &mvm; result = iwl_mvm_mld_valid_link_pair(vif, &link_a, &link_b); -- 2.34.1