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From:   gregory.greenman@intel.com
To:     johannes@sipsolutions.net
Cc:     linux-wireless@vger.kernel.org,
        Johannes Berg <johannes.berg@intel.com>,
        Gregory Greenman <gregory.greenman@intel.com>
Subject: [PATCH 14/19] wifi: iwlwifi: mvm: support new flush_sta method
Date:   Tue, 20 Jun 2023 13:04:00 +0300
Message-Id: <20230620125813.a1f8ec20b727.I48594b708b41aa55dc2b8c3d346b4412ad3a5ba3@changeid>
In-Reply-To: <20230620100405.45117-1-gregory.greenman@intel.com>
References: <20230620100405.45117-1-gregory.greenman@intel.com>
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From: Johannes Berg <johannes.berg@intel.com>

For iwlwifi this is simple to implement, and on newer hardware
it's an improvement since we have per-station queues.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
---
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 25 +++++++++++++++++++
 .../wireless/intel/iwlwifi/mvm/mld-mac80211.c |  1 +
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h  |  2 ++
 3 files changed, 28 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index ebe4163837a0..f083ebda1e83 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -5652,6 +5652,30 @@ void iwl_mvm_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		iwl_trans_wait_tx_queues_empty(mvm->trans, msk);
 }
 
+void iwl_mvm_mac_flush_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			   struct ieee80211_sta *sta)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+	int i;
+
+	mutex_lock(&mvm->mutex);
+	for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
+		struct iwl_mvm_sta *mvmsta;
+		struct ieee80211_sta *tmp;
+
+		tmp = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
+						lockdep_is_held(&mvm->mutex));
+		if (tmp != sta)
+			continue;
+
+		mvmsta = iwl_mvm_sta_from_mac80211(sta);
+
+		if (iwl_mvm_flush_sta(mvm, mvmsta, false))
+			IWL_ERR(mvm, "flush request fail\n");
+	}
+	mutex_unlock(&mvm->mutex);
+}
+
 int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
 			   struct survey_info *survey)
 {
@@ -6204,6 +6228,7 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
 	.mgd_complete_tx = iwl_mvm_mac_mgd_complete_tx,
 	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
 	.flush = iwl_mvm_mac_flush,
+	.flush_sta = iwl_mvm_mac_flush_sta,
 	.sched_scan_start = iwl_mvm_mac_sched_scan_start,
 	.sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
 	.set_key = iwl_mvm_mac_set_key,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
index 636ad2b76428..8b6c641772ee 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
@@ -1149,6 +1149,7 @@ const struct ieee80211_ops iwl_mvm_mld_hw_ops = {
 	.mgd_complete_tx = iwl_mvm_mac_mgd_complete_tx,
 	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
 	.flush = iwl_mvm_mac_flush,
+	.flush_sta = iwl_mvm_mac_flush_sta,
 	.sched_scan_start = iwl_mvm_mac_sched_scan_start,
 	.sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
 	.set_key = iwl_mvm_mac_set_key,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index b575ce2f7146..b83df0631279 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -2659,6 +2659,8 @@ void iwl_mvm_mac_mgd_complete_tx(struct ieee80211_hw *hw,
 				 struct ieee80211_prep_tx_info *info);
 void iwl_mvm_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		       u32 queues, bool drop);
+void iwl_mvm_mac_flush_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			   struct ieee80211_sta *sta);
 int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
 				 struct ieee80211_vif *vif,
 				 struct cfg80211_sched_scan_request *req,
-- 
2.38.1