iwlwifi: mvm: enable low latency for soft ap

Enable low latency for softAP in all modes (standalone, SCM
and DCM).
This is in order to minimize the time the softAP leaves the channel for
other operations
Signed-off-by: Tova Mussai <tova.mussai@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c

@@ -1299,10 +1299,11 @@ static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
 	int len;
 
 	len = scnprintf(buf, sizeof(buf) - 1,
-			"traffic=%d\ndbgfs=%d\nvcmd=%d\n",
+			"traffic=%d\ndbgfs=%d\nvcmd=%d\nvif_type=%d\n",
 			!!(mvmvif->low_latency & LOW_LATENCY_TRAFFIC),
 			!!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS),
-			!!(mvmvif->low_latency & LOW_LATENCY_VCMD));
+			!!(mvmvif->low_latency & LOW_LATENCY_VCMD),
+			!!(mvmvif->low_latency & LOW_LATENCY_VIF_TYPE));
 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 }
 

drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

@@ -2379,6 +2379,12 @@ static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
 	/* must be set before quota calculations */
 	mvmvif->ap_ibss_active = true;
 
+	if (vif->type == NL80211_IFTYPE_AP && !vif->p2p) {
+		iwl_mvm_vif_set_low_latency(mvmvif, true,
+					    LOW_LATENCY_VIF_TYPE);
+		iwl_mvm_send_low_latency_cmd(mvm, true, mvmvif->id);
+	}
+
 	/* power updated needs to be done before quotas */
 	iwl_mvm_power_update_mac(mvm);
 
@@ -2441,6 +2447,12 @@ static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
 	mvmvif->ap_ibss_active = false;
 	mvm->ap_last_beacon_gp2 = 0;
 
+	if (vif->type == NL80211_IFTYPE_AP && !vif->p2p) {
+		iwl_mvm_vif_set_low_latency(mvmvif, false,
+					    LOW_LATENCY_VIF_TYPE);
+		iwl_mvm_send_low_latency_cmd(mvm, false,  mvmvif->id);
+	}
+
 	iwl_mvm_bt_coex_vif_change(mvm);
 
 	iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -303,11 +303,13 @@ enum iwl_bt_force_ant_mode {
 * @LOW_LATENCY_TRAFFIC: indicates low latency traffic was detected
 * @LOW_LATENCY_DEBUGFS: low latency mode set from debugfs
 * @LOW_LATENCY_VCMD: low latency mode set from vendor command
+* @LOW_LATENCY_VIF_TYPE: low latency mode set because of vif type (ap)
 */
 enum iwl_mvm_low_latency_cause {
 	LOW_LATENCY_TRAFFIC = BIT(0),
 	LOW_LATENCY_DEBUGFS = BIT(1),
 	LOW_LATENCY_VCMD = BIT(2),
+	LOW_LATENCY_VIF_TYPE = BIT(3),
 };
 
 /**
@@ -1845,6 +1847,8 @@ int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 /* get SystemLowLatencyMode - only needed for beacon threshold? */
 bool iwl_mvm_low_latency(struct iwl_mvm *mvm);
 bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band);
+void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm, bool low_latency,
+				  u16 mac_id);
 
 /* get VMACLowLatencyMode */
 static inline bool iwl_mvm_vif_low_latency(struct iwl_mvm_vif *mvmvif)

drivers/net/wireless/intel/iwlwifi/mvm/utils.c

@@ -764,6 +764,29 @@ bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
 	return result;
 }
 
+void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
+				  bool low_latency, u16 mac_id)
+{
+	struct iwl_mac_low_latency_cmd cmd = {
+		.mac_id = cpu_to_le32(mac_id)
+	};
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa,
+			 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
+		return;
+
+	if (low_latency) {
+		/* currently we don't care about the direction */
+		cmd.low_latency_rx = 1;
+		cmd.low_latency_tx = 1;
+	}
+
+	if (iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(LOW_LATENCY_CMD,
+						 MAC_CONF_GROUP, 0),
+				 0, sizeof(cmd), &cmd))
+		IWL_ERR(mvm, "Failed to send low latency command\n");
+}
+
 int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 			       bool low_latency,
 			       enum iwl_mvm_low_latency_cause cause)
@@ -782,24 +805,7 @@ int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 	if (low_latency == prev)
 		return 0;
 
-	if (fw_has_capa(&mvm->fw->ucode_capa,
-			IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA)) {
-		struct iwl_mac_low_latency_cmd cmd = {
-			.mac_id = cpu_to_le32(mvmvif->id)
-		};
-
-		if (low_latency) {
-			/* currently we don't care about the direction */
-			cmd.low_latency_rx = 1;
-			cmd.low_latency_tx = 1;
-		}
-		res = iwl_mvm_send_cmd_pdu(mvm,
-					   iwl_cmd_id(LOW_LATENCY_CMD,
-						      MAC_CONF_GROUP, 0),
-					   0, sizeof(cmd), &cmd);
-		if (res)
-			IWL_ERR(mvm, "Failed to send low latency command\n");
-	}
+	iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
 
 	res = iwl_mvm_update_quotas(mvm, false, NULL);
 	if (res)