qcacmn: Add support for asynchronous Host to Target connection

Add support for asynchronous Host to Target connection connection in
whcih packets can be queued in both interrrupt and process context.

Change-Id: I52f0f972b938a558e4ef3c13cf4d76aa3a63d58f
CRs-Fixed: 1092518

htc/htc_api.h

@@ -770,4 +770,18 @@ int htc_pm_runtime_put(HTC_HANDLE htc_handle);
 static inline int htc_pm_runtime_get(HTC_HANDLE htc_handle) { return 0; }
 static inline int htc_pm_runtime_put(HTC_HANDLE htc_handle) { return 0; }
 #endif
+
+/**
+  * htc_set_async_ep() - set async HTC end point
+  *           user should call this function after htc_connect_service before
+  *           queing any packets to end point
+  * @HTCHandle: htc handle
+  * @HTC_ENDPOINT_ID: end point id
+  * @value: true or false
+  *
+  * Return: None
+  */
+
+void htc_set_async_ep(HTC_HANDLE HTCHandle,
+			HTC_ENDPOINT_ID htc_ep_id, bool value);
 #endif /* _HTC_API_H_ */

htc/htc_internal.h

@@ -135,6 +135,7 @@ typedef struct _HTC_ENDPOINT {
 	HTC_ENDPOINT_STATS endpoint_stats;     /* endpoint statistics */
 #endif
 	bool TxCreditFlowEnabled;
+	bool async_update;  /* packets can be queued asynchronously */
 } HTC_ENDPOINT;
 
 #ifdef HTC_EP_STAT_PROFILING

htc/htc_send.c

@@ -616,14 +616,14 @@ static A_STATUS htc_issue_packets(HTC_TARGET *target,
 			}
 		}
 
-		if (pEndpoint->service_id != WMI_CONTROL_SVC) {
+		if (!pEndpoint->async_update) {
 			LOCK_HTC_TX(target);
 		}
 		/* store in look up queue to match completions */
 		HTC_PACKET_ENQUEUE(&pEndpoint->TxLookupQueue, pPacket);
 		INC_HTC_EP_STAT(pEndpoint, TxIssued, 1);
 		pEndpoint->ul_outstanding_cnt++;
-		if (pEndpoint->service_id != WMI_CONTROL_SVC) {
+		if (!pEndpoint->async_update) {
 			UNLOCK_HTC_TX(target);
 			hif_send_complete_check(target->hif_dev,
 					pEndpoint->UL_PipeID, false);
@@ -651,7 +651,7 @@ static A_STATUS htc_issue_packets(HTC_TARGET *target,
 						("hif_send Failed status:%d \n",
 						 status));
 			}
-			if (pEndpoint->service_id != WMI_CONTROL_SVC) {
+			if (!pEndpoint->async_update) {
 				LOCK_HTC_TX(target);
 			}
 			target->ce_send_cnt--;
@@ -662,7 +662,7 @@ static A_STATUS htc_issue_packets(HTC_TARGET *target,
 					pPacket->PktInfo.AsTx.CreditsUsed;
 			/* put it back into the callers queue */
 			HTC_PACKET_ENQUEUE_TO_HEAD(pPktQueue, pPacket);
-			if (pEndpoint->service_id != WMI_CONTROL_SVC) {
+			if (!pEndpoint->async_update) {
 				UNLOCK_HTC_TX(target);
 			}
 			break;
@@ -1156,9 +1156,12 @@ static HTC_SEND_QUEUE_RESULT htc_try_send(HTC_TARGET *target,
 	 * transmit resources */
 	while (true) {
 
-		if ((HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue) == 0) ||
-			((!tx_resources) &&
-			(pEndpoint->service_id == WMI_CONTROL_SVC))) {
+		if (HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue) == 0)
+			break;
+
+		if (pEndpoint->async_update &&
+			(!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) &&
+			(!tx_resources)) {
 			break;
 		}
 
@@ -1211,7 +1214,7 @@ static HTC_SEND_QUEUE_RESULT htc_try_send(HTC_TARGET *target,
 			break;
 		}
 
-		if (pEndpoint->service_id != WMI_CONTROL_SVC) {
+		if (!pEndpoint->async_update) {
 			UNLOCK_HTC_TX(target);
 		}
 
@@ -1229,7 +1232,7 @@ static HTC_SEND_QUEUE_RESULT htc_try_send(HTC_TARGET *target,
 			HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxQueue,
 							  &sendQueue);
 
-			if (pEndpoint->service_id != WMI_CONTROL_SVC) {
+			if (!pEndpoint->async_update) {
 				LOCK_HTC_TX(target);
 			}
 			break;
@@ -1241,7 +1244,7 @@ static HTC_SEND_QUEUE_RESULT htc_try_send(HTC_TARGET *target,
 							  pEndpoint->UL_PipeID);
 		}
 
-		if (pEndpoint->service_id != WMI_CONTROL_SVC) {
+		if (!pEndpoint->async_update) {
 			LOCK_HTC_TX(target);
 		}
 
@@ -1920,7 +1923,7 @@ QDF_STATUS htc_tx_completion_handler(void *Context,
 		* when credits flow back from the target.
 		* in the non-TX credit case, we recheck after the packet completes */
 		if ((qdf_atomic_read(&pEndpoint->TxProcessCount) == 0) ||
-				(pEndpoint->service_id != WMI_CONTROL_SVC)) {
+				(!pEndpoint->async_update)) {
 			htc_try_send(target, pEndpoint, NULL);
 		}
 	}

htc/htc_services.c

@@ -357,6 +357,7 @@ A_STATUS htc_connect_service(HTC_HANDLE HTCHandle,
 
 		/* copy all the callbacks */
 		pEndpoint->EpCallBacks = pConnectReq->EpCallbacks;
+		pEndpoint->async_update = 0;
 
 		status = hif_map_service_to_pipe(target->hif_dev,
 						 pEndpoint->service_id,
@@ -424,3 +425,16 @@ void htc_fw_event_handler(void *context, QDF_STATUS status)
 		initInfo->TargetFailure(initInfo->pContext, status);
 	}
 }
+
+
+void htc_set_async_ep(HTC_HANDLE HTCHandle,
+			HTC_ENDPOINT_ID htc_ep_id, bool value)
+{
+	HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
+	HTC_ENDPOINT *pEndpoint = &target->endpoint[htc_ep_id];
+
+	pEndpoint->async_update = value;
+	qdf_print("%s: htc_handle %p, ep %d, value %d\n", __func__,
+					HTCHandle, htc_ep_id, value);
+}
+