qcacld-3.0: CSA count offload to fw in case of AP/P2PGO

Currently, host decrements beacon switch count and sends
channel switch frame every time until count becomes 0 this
may introduce sync issue between fw and host in case fw has
not sent beacons but host decremented switch count due to
timeout and sent new channel switch frame or vdev restart in
case count beacomes 0.

Fix is to offload CSA to fw to avoid any sync issue.

Change-Id: Idb48d419ec4117ff39cb823ca8af75d7a0abc3c0
CRs-Fixed: 2828045

components/mlme/core/src/wlan_mlme_vdev_mgr_interface.c

@@ -1523,6 +1523,31 @@ QDF_STATUS mlme_vdev_self_peer_delete(struct scheduler_msg *self_peer_del_msg)
 	return status;
 }
 
+/**
+ * ap_mlme_vdev_csa_complete() - callback to initiate csa complete
+ *
+ * @vdev_mlme: vdev mlme object
+ *
+ * This function is called for csa complete indication
+ *
+ * Return: QDF_STATUS
+ */
+static QDF_STATUS ap_mlme_vdev_csa_complete(struct vdev_mlme_obj *vdev_mlme)
+
+{
+	uint8_t vdev_id;
+
+	vdev_id = wlan_vdev_get_id(vdev_mlme->vdev);
+	mlme_legacy_debug("vdev id = %d ", vdev_id);
+
+	if (lim_is_csa_tx_pending(vdev_id))
+		lim_send_csa_tx_complete(vdev_id);
+	else
+		mlme_legacy_debug("CSAIE_TX_COMPLETE_IND already sent");
+
+	return QDF_STATUS_SUCCESS;
+}
+
 /**
  * struct sta_mlme_ops - VDEV MLME operation callbacks strucutre for sta
  * @mlme_vdev_start_send:               callback to initiate actions of VDEV
@@ -1620,6 +1645,7 @@ static struct vdev_mlme_ops ap_mlme_ops = {
 	.mlme_vdev_ext_start_rsp = vdevmgr_vdev_start_rsp_handle,
 	.mlme_vdev_ext_peer_delete_all_rsp =
 				vdevmgr_vdev_peer_delete_all_rsp_handle,
+	.mlme_vdev_csa_complete = ap_mlme_vdev_csa_complete,
 };
 
 static struct vdev_mlme_ops mon_mlme_ops = {

core/mac/src/pe/lim/lim_send_sme_rsp_messages.c

@@ -2146,6 +2146,7 @@ lim_process_beacon_tx_success_ind(struct mac_context *mac_ctx, uint16_t msgType,
 				  void *event)
 {
 	struct pe_session *session;
+	bool csa_tx_offload;
 	tpSirFirstBeaconTxCompleteInd bcn_ind =
 		(tSirFirstBeaconTxCompleteInd *) event;
 
@@ -2163,10 +2164,12 @@ lim_process_beacon_tx_success_ind(struct mac_context *mac_ctx, uint16_t msgType,
 
 	if (!LIM_IS_AP_ROLE(session))
 		return;
-
+	csa_tx_offload = wlan_psoc_nif_fw_ext_cap_get(mac_ctx->psoc,
+						WLAN_SOC_CEXT_CSA_TX_OFFLOAD);
 	if (session->dfsIncludeChanSwIe &&
 	    (session->gLimChannelSwitch.switchCount ==
-	    mac_ctx->sap.SapDfsInfo.sap_ch_switch_beacon_cnt))
+	    mac_ctx->sap.SapDfsInfo.sap_ch_switch_beacon_cnt) &&
+	    !csa_tx_offload)
 		lim_process_ap_ecsa_timeout(session);
 
 

core/mac/src/pe/lim/lim_utils.c

@@ -7971,12 +7971,92 @@ lim_send_dfs_chan_sw_ie_update(struct mac_context *mac_ctx, struct pe_session *s
 		 session->gLimChannelSwitch.switchCount);
 }
 
+bool lim_is_csa_tx_pending(uint8_t vdev_id)
+{
+	struct pe_session *session;
+	struct mac_context *mac_ctx = cds_get_context(QDF_MODULE_ID_PE);
+	bool csa_tx_offload;
+
+	if (!mac_ctx) {
+		mlme_err("Invalid mac context");
+		return false;
+	}
+
+	session = pe_find_session_by_vdev_id(mac_ctx, vdev_id);
+	if (!session) {
+		pe_err("Session does not exist for given vdev_id %d", vdev_id);
+		return false;
+	}
+
+	csa_tx_offload = wlan_psoc_nif_fw_ext_cap_get(mac_ctx->psoc,
+						  WLAN_SOC_CEXT_CSA_TX_OFFLOAD);
+	if (session->dfsIncludeChanSwIe &&
+	    (session->gLimChannelSwitch.switchCount ==
+	     mac_ctx->sap.SapDfsInfo.sap_ch_switch_beacon_cnt) &&
+	     csa_tx_offload)
+		return true;
+
+	return false;
+}
+
+void lim_send_csa_tx_complete(uint8_t vdev_id)
+{
+	QDF_STATUS status;
+	tSirSmeCSAIeTxCompleteRsp *chan_switch_tx_rsp;
+	struct pe_session *session;
+	struct scheduler_msg msg = {0};
+	bool csa_tx_offload;
+	uint8_t length = sizeof(*chan_switch_tx_rsp);
+	struct mac_context *mac_ctx = cds_get_context(QDF_MODULE_ID_PE);
+
+	if (!mac_ctx) {
+		mlme_err("Invalid mac context");
+		return;
+	}
+
+	session = pe_find_session_by_vdev_id(mac_ctx, vdev_id);
+	if (!session) {
+		pe_err("Session does not exist for given vdev_id %d", vdev_id);
+		return;
+	}
+
+	/* Stop the timer if already running in case of csa*/
+	csa_tx_offload = wlan_psoc_nif_fw_ext_cap_get(mac_ctx->psoc,
+						WLAN_SOC_CEXT_CSA_TX_OFFLOAD);
+	if (csa_tx_offload)
+		qdf_mc_timer_stop(&session->ap_ecsa_timer);
+
+	/* Done with CSA IE update, send response back to SME */
+	session->gLimChannelSwitch.switchCount = 0;
+	if (mac_ctx->sap.SapDfsInfo.disable_dfs_ch_switch == false)
+		session->gLimChannelSwitch.switchMode = 0;
+
+	session->dfsIncludeChanSwIe = false;
+	session->dfsIncludeChanWrapperIe = false;
+
+	chan_switch_tx_rsp = qdf_mem_malloc(length);
+	if (!chan_switch_tx_rsp)
+		return;
+
+	chan_switch_tx_rsp->sessionId = session->smeSessionId;
+	chan_switch_tx_rsp->chanSwIeTxStatus = QDF_STATUS_SUCCESS;
+
+	msg.type = eWNI_SME_DFS_CSAIE_TX_COMPLETE_IND;
+	msg.bodyptr = chan_switch_tx_rsp;
+
+	status = scheduler_post_message(QDF_MODULE_ID_PE, QDF_MODULE_ID_SME,
+					QDF_MODULE_ID_SME, &msg);
+	if (QDF_IS_STATUS_ERROR(status))
+		qdf_mem_free(chan_switch_tx_rsp);
+}
+
 void lim_process_ap_ecsa_timeout(void *data)
 {
 	struct pe_session *session = (struct pe_session *)data;
 	struct mac_context *mac_ctx;
 	uint8_t bcn_int, ch_width;
 	uint32_t ch_freq;
+	bool csa_tx_offload;
 	QDF_STATUS status;
 
 	if (!session || !session->valid) {
@@ -7991,6 +8071,15 @@ void lim_process_ap_ecsa_timeout(void *data)
 		return;
 	}
 
+	if (lim_is_csa_tx_pending(session->vdev_id))
+		return lim_send_csa_tx_complete(session->vdev_id);
+
+	csa_tx_offload = wlan_psoc_nif_fw_ext_cap_get(mac_ctx->psoc,
+						  WLAN_SOC_CEXT_CSA_TX_OFFLOAD);
+
+	if (csa_tx_offload)
+		return;
+
 	/* Stop the timer if already running */
 	qdf_mc_timer_stop(&session->ap_ecsa_timer);
 
@@ -8034,32 +8123,7 @@ void lim_process_ap_ecsa_timeout(void *data)
 			lim_process_ap_ecsa_timeout(session);
 		}
 	} else {
-		tSirSmeCSAIeTxCompleteRsp *chan_switch_tx_rsp;
-		struct scheduler_msg msg = {0};
-		uint8_t length = sizeof(*chan_switch_tx_rsp);
-
-		/* Done with CSA IE update, send response back to SME */
-		session->gLimChannelSwitch.switchCount = 0;
-		if (mac_ctx->sap.SapDfsInfo.disable_dfs_ch_switch == false)
-			session->gLimChannelSwitch.switchMode = 0;
-		session->dfsIncludeChanSwIe = false;
-		session->dfsIncludeChanWrapperIe = false;
-
-		chan_switch_tx_rsp = qdf_mem_malloc(length);
-		if (!chan_switch_tx_rsp)
-			return;
-
-		chan_switch_tx_rsp->sessionId = session->smeSessionId;
-		chan_switch_tx_rsp->chanSwIeTxStatus = QDF_STATUS_SUCCESS;
-
-		msg.type = eWNI_SME_DFS_CSAIE_TX_COMPLETE_IND;
-		msg.bodyptr = chan_switch_tx_rsp;
-
-		status = scheduler_post_message(QDF_MODULE_ID_PE,
-						QDF_MODULE_ID_SME,
-						QDF_MODULE_ID_SME, &msg);
-		if (QDF_IS_STATUS_ERROR(status))
-			qdf_mem_free(chan_switch_tx_rsp);
+		lim_send_csa_tx_complete(session->vdev_id);
 	}
 }
 

core/mac/src/pe/lim/lim_utils.h

@@ -1661,6 +1661,23 @@ void lim_send_dfs_chan_sw_ie_update(struct mac_context *mac_ctx,
  */
 void lim_process_ap_ecsa_timeout(void *session);
 
+/**
+ * lim_send_csa_tx_complete() - send csa tx complete event when beacon
+ * count decremented to zero
+ *
+ * @vdev_id - vdev_id
+ * Return None
+ */
+void lim_send_csa_tx_complete(uint8_t vdev_id);
+
+/**
+ * lim_is_csa_tx_pending() - check id csa tx ind not sent
+ *
+ * @vdev_id - vdev_id
+ * Return - true if csa tx ind is not sent else false
+ */
+bool lim_is_csa_tx_pending(uint8_t vdev_id);
+
 /**
  * lim_send_stop_bss_failure_resp() -send failure delete bss resp to sme
  * @mac_ctx: mac ctx