diff options
Diffstat (limited to 'OvmfPkg/VirtioGpuDxe/Commands.c')
| -rw-r--r-- | OvmfPkg/VirtioGpuDxe/Commands.c | 75 |
1 files changed, 57 insertions, 18 deletions
diff --git a/OvmfPkg/VirtioGpuDxe/Commands.c b/OvmfPkg/VirtioGpuDxe/Commands.c index 873a716..b9a3ea9 100644 --- a/OvmfPkg/VirtioGpuDxe/Commands.c +++ b/OvmfPkg/VirtioGpuDxe/Commands.c @@ -393,6 +393,14 @@ VirtioGpuExitBoot ( @param[in] RequestSize Size of the entire caller-allocated request object,
including the leading VIRTIO_GPU_CONTROL_HEADER.
+ @param[in] ResponseType The type of the response (VirtioGpuResp*).
+
+ @param[in,out] Response Pointer to the caller-allocated response object. The
+ request must start with VIRTIO_GPU_CONTROL_HEADER.
+
+ @param[in] ResponseSize Size of the entire caller-allocated response object,
+ including the leading VIRTIO_GPU_CONTROL_HEADER.
+
@retval EFI_SUCCESS Operation successful.
@retval EFI_DEVICE_ERROR The host rejected the request. The host error
@@ -404,22 +412,24 @@ VirtioGpuExitBoot ( **/
STATIC
EFI_STATUS
-VirtioGpuSendCommand (
+VirtioGpuSendCommandWithReply (
IN OUT VGPU_DEV *VgpuDev,
IN VIRTIO_GPU_CONTROL_TYPE RequestType,
IN BOOLEAN Fence,
IN OUT volatile VIRTIO_GPU_CONTROL_HEADER *Header,
- IN UINTN RequestSize
+ IN UINTN RequestSize,
+ IN VIRTIO_GPU_CONTROL_TYPE ResponseType,
+ IN OUT volatile VIRTIO_GPU_CONTROL_HEADER *Response,
+ IN UINTN ResponseSize
)
{
- DESC_INDICES Indices;
- volatile VIRTIO_GPU_CONTROL_HEADER Response;
- EFI_STATUS Status;
- UINT32 ResponseSize;
- EFI_PHYSICAL_ADDRESS RequestDeviceAddress;
- VOID *RequestMap;
- EFI_PHYSICAL_ADDRESS ResponseDeviceAddress;
- VOID *ResponseMap;
+ DESC_INDICES Indices;
+ EFI_STATUS Status;
+ UINT32 ResponseSizeRet;
+ EFI_PHYSICAL_ADDRESS RequestDeviceAddress;
+ VOID *RequestMap;
+ EFI_PHYSICAL_ADDRESS ResponseDeviceAddress;
+ VOID *ResponseMap;
//
// Initialize Header.
@@ -457,8 +467,8 @@ VirtioGpuSendCommand ( Status = VirtioMapAllBytesInSharedBuffer (
VgpuDev->VirtIo,
VirtioOperationBusMasterWrite,
- (VOID *)&Response,
- sizeof Response,
+ (VOID *)Response,
+ ResponseSize,
&ResponseDeviceAddress,
&ResponseMap
);
@@ -480,7 +490,7 @@ VirtioGpuSendCommand ( VirtioAppendDesc (
&VgpuDev->Ring,
ResponseDeviceAddress,
- (UINT32)sizeof Response,
+ (UINT32)ResponseSize,
VRING_DESC_F_WRITE,
&Indices
);
@@ -493,7 +503,7 @@ VirtioGpuSendCommand ( VIRTIO_GPU_CONTROL_QUEUE,
&VgpuDev->Ring,
&Indices,
- &ResponseSize
+ &ResponseSizeRet
);
if (EFI_ERROR (Status)) {
goto UnmapResponse;
@@ -502,7 +512,7 @@ VirtioGpuSendCommand ( //
// Verify response size.
//
- if (ResponseSize != sizeof Response) {
+ if (ResponseSize != ResponseSizeRet) {
DEBUG ((
DEBUG_ERROR,
"%a: malformed response to Request=0x%x\n",
@@ -531,16 +541,17 @@ VirtioGpuSendCommand ( //
// Parse the response.
//
- if (Response.Type == VirtioGpuRespOkNodata) {
+ if (Response->Type == (UINT32)ResponseType) {
return EFI_SUCCESS;
}
DEBUG ((
DEBUG_ERROR,
- "%a: Request=0x%x Response=0x%x\n",
+ "%a: Request=0x%x Response=0x%x (expected 0x%x)\n",
__FUNCTION__,
(UINT32)RequestType,
- Response.Type
+ Response->Type,
+ ResponseType
));
return EFI_DEVICE_ERROR;
@@ -554,6 +565,34 @@ UnmapRequest: }
/**
+ Simplified version of VirtioGpuSendCommandWithReply() for commands
+ which do not send back any data.
+**/
+STATIC
+EFI_STATUS
+VirtioGpuSendCommand (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN VIRTIO_GPU_CONTROL_TYPE RequestType,
+ IN BOOLEAN Fence,
+ IN OUT volatile VIRTIO_GPU_CONTROL_HEADER *Header,
+ IN UINTN RequestSize
+ )
+{
+ volatile VIRTIO_GPU_CONTROL_HEADER Response;
+
+ return VirtioGpuSendCommandWithReply (
+ VgpuDev,
+ RequestType,
+ Fence,
+ Header,
+ RequestSize,
+ VirtioGpuRespOkNodata,
+ &Response,
+ sizeof (Response)
+ );
+}
+
+/**
The following functions send requests to the VirtIo GPU device model, await
the answer from the host, and return a status. They share the following
interface details:
|