virtio: refactor to have a handler per queue.

* enable to iterate on available entries in one interrupt call.
* negociate -> negotiate, (void *) -> (void* ), thanks axel and philippe!

Change-Id: Ie2d290797abcbf4c0f3cb5bfff71d091bb800fa6

headers/private/virtio/virtio.h

@@ -53,9 +53,9 @@ typedef void* virtio_device;
 // queue cookie, issued by virtio bus manager
 typedef void* virtio_queue;
 // callback function for requests
-typedef void (*virtio_callback_func)(void* driverCookie, void *cookie);
+typedef void (*virtio_callback_func)(void* driverCookie, void* cookie);
 // callback function for interrupts
-typedef void (*virtio_intr_func)(void *cookie);
+typedef void (*virtio_intr_func)(void* cookie);
 
 #define	VIRTIO_DEVICE_MODULE_NAME "bus_managers/virtio/device/v1"
 
@@ -93,8 +93,8 @@ typedef struct {
 typedef struct {
 	driver_module_info info;
 
-	status_t (*negociate_features)(virtio_device cookie, uint32 supported,
-		uint32* negociated, const char* (*get_feature_name)(uint32));
+	status_t (*negotiate_features)(virtio_device cookie, uint32 supported,
+		uint32* negotiated, const char* (*get_feature_name)(uint32));
 
 	status_t (*read_device_config)(virtio_device cookie, uint8 offset,
 		void* buffer, size_t bufferSize);
@@ -102,20 +102,22 @@ typedef struct {
 		const void* buffer, size_t bufferSize);
 
 	status_t (*alloc_queues)(virtio_device cookie, size_t count,
-		virtio_queue *queues);
+		virtio_queue* queues);
 
 	status_t (*setup_interrupt)(virtio_device cookie,
 		virtio_intr_func config_handler, void* driverCookie);
 
+	status_t (*queue_setup_interrupt)(virtio_queue queue,
+		virtio_callback_func handler, void* cookie);
+
 	status_t (*queue_request)(virtio_queue queue,
-		const physical_entry *readEntry,
-		const physical_entry *writtenEntry, virtio_callback_func callback,
-		void *callbackCookie);
+		const physical_entry* readEntry,
+		const physical_entry* writtenEntry, void* cookie);
 
 	status_t (*queue_request_v)(virtio_queue queue,
 		const physical_entry* vector,
 		size_t readVectorCount, size_t writtenVectorCount,
-		virtio_callback_func callback, void *callbackCookie);
+		void* cookie);
 
 	bool (*queue_is_full)(virtio_queue queue);
 
@@ -123,6 +125,8 @@ typedef struct {
 
 	uint16 (*queue_size)(virtio_queue queue);
 
+	void* (*queue_dequeue)(virtio_queue queue, uint16* _size);
+
 } virtio_device_interface;