staging: vchi: Move vchi_queue_kernel_message() into vchiq

We can't really merge it with vchiq_queue_message() as it has internal
users that will not benefit from the retry mechanism
vchiq_queue_kernel_message() uses. So, for the sake of getting rid of
vchi, move it into vchiq.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629150945.10720-43-nsaenzjulienne@suse.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c

@@ -44,8 +44,8 @@ static int bcm2835_audio_send_msg_locked(struct bcm2835_audio_instance *instance
 		init_completion(&instance->msg_avail_comp);
 	}
 
-	status = vchi_queue_kernel_message(instance->service_handle,
-					   m, sizeof(*m));
+	status = vchiq_queue_kernel_message(instance->service_handle,
+					    m, sizeof(*m));
 	if (status) {
 		dev_err(instance->dev,
 			"vchi message queue failed: %d, msg=%d\n",
@@ -350,8 +350,8 @@ int bcm2835_audio_write(struct bcm2835_alsa_stream *alsa_stream,
 		while (count > 0) {
 			int bytes = min(instance->max_packet, count);
 
-			status = vchi_queue_kernel_message(instance->service_handle,
-							   src, bytes);
+			status = vchiq_queue_kernel_message(instance->service_handle,
+							    src, bytes);
 			src += bytes;
 			count -= bytes;
 		}

drivers/staging/vc04_services/interface/vchi/vchi.h

@@ -37,10 +37,6 @@ extern int32_t vchi_service_use(unsigned handle);
 // Routine to decrement ref count on a named service
 extern int32_t vchi_service_release(unsigned handle);
 
-/* Routine to send a message from kernel memory across a service */
-extern int vchi_queue_kernel_message(unsigned handle, void *data,
-				     unsigned int size);
-
 // Routine to look at a message in place.
 // The message is dequeued, so the caller is left holding it; the descriptor is
 // filled in and must be released when the user has finished with the message.

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c

@@ -3213,11 +3213,28 @@ vchiq_queue_message(unsigned int handle,
 	return status;
 }
 
-enum vchiq_status vchiq_queue_kernel_message(unsigned int handle, void *context,
-				      size_t size)
+int vchiq_queue_kernel_message(unsigned handle, void *data, unsigned size)
 {
-	return vchiq_queue_message(handle, memcpy_copy_callback, context, size);
+	enum vchiq_status status;
+
+	while (1) {
+		status = vchiq_queue_message(handle, memcpy_copy_callback,
+					     data, size);
+
+		/*
+		 * vchiq_queue_message() may return VCHIQ_RETRY, so we need to
+		 * implement a retry mechanism since this function is supposed
+		 * to block until queued
+		 */
+		if (status != VCHIQ_RETRY)
+			break;
+
+		msleep(1);
+	}
+
+	return status;
 }
+EXPORT_SYMBOL(vchiq_queue_kernel_message);
 
 void
 vchiq_release_message(unsigned int handle,

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h

@@ -89,8 +89,8 @@ extern enum vchiq_status vchiq_open_service(struct vchiq_instance *instance,
 extern enum vchiq_status vchiq_close_service(unsigned int service);
 extern enum vchiq_status vchiq_use_service(unsigned int service);
 extern enum vchiq_status vchiq_release_service(unsigned int service);
-extern enum vchiq_status vchiq_queue_kernel_message(unsigned int handle,
-						    void *context, size_t size);
+extern int vchiq_queue_kernel_message(unsigned handle, void *data,
+				      unsigned size);
 extern void vchiq_msg_queue_push(unsigned handle, struct vchiq_header *header);
 extern void           vchiq_release_message(unsigned int service,
 	struct vchiq_header *header);

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_shim.c

@@ -9,28 +9,6 @@
 #include "../vchi/vchi.h"
 #include "vchiq.h"
 
-int vchi_queue_kernel_message(unsigned handle, void *data, unsigned int size)
-{
-	enum vchiq_status status;
-
-	while (1) {
-		status = vchiq_queue_kernel_message(handle, data, size);
-
-		/*
-		 * vchiq_queue_message() may return VCHIQ_RETRY, so we need to
-		 * implement a retry mechanism since this function is supposed
-		 * to block until queued
-		 */
-		if (status != VCHIQ_RETRY)
-			break;
-
-		msleep(1);
-	}
-
-	return status;
-}
-EXPORT_SYMBOL(vchi_queue_kernel_message);
-
 /***********************************************************
  * Name: vchi_held_msg_release
  *

drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c

@@ -440,10 +440,9 @@ buffer_from_host(struct vchiq_mmal_instance *instance,
 
 	vchi_service_use(instance->service_handle);
 
-	ret = vchi_queue_kernel_message(instance->service_handle,
-					&m,
-					sizeof(struct mmal_msg_header) +
-					sizeof(m.u.buffer_from_host));
+	ret = vchiq_queue_kernel_message(instance->service_handle, &m,
+					 sizeof(struct mmal_msg_header) +
+					 sizeof(m.u.buffer_from_host));
 
 	vchi_service_release(instance->service_handle);
 
@@ -681,10 +680,9 @@ static int send_synchronous_mmal_msg(struct vchiq_mmal_instance *instance,
 
 	vchi_service_use(instance->service_handle);
 
-	ret = vchi_queue_kernel_message(instance->service_handle,
-					msg,
-					sizeof(struct mmal_msg_header) +
-					payload_len);
+	ret = vchiq_queue_kernel_message(instance->service_handle, msg,
+					 sizeof(struct mmal_msg_header) +
+					 payload_len);
 
 	vchi_service_release(instance->service_handle);