diff options
Diffstat (limited to 'OvmfPkg/VirtioGpuDxe')
| -rw-r--r-- | OvmfPkg/VirtioGpuDxe/Commands.c | 347 | ||||
| -rw-r--r-- | OvmfPkg/VirtioGpuDxe/VirtioGpu.h | 93 |
2 files changed, 439 insertions, 1 deletions
diff --git a/OvmfPkg/VirtioGpuDxe/Commands.c b/OvmfPkg/VirtioGpuDxe/Commands.c index 804de95..b369dc3 100644 --- a/OvmfPkg/VirtioGpuDxe/Commands.c +++ b/OvmfPkg/VirtioGpuDxe/Commands.c @@ -14,7 +14,6 @@ **/
-#include <IndustryStandard/VirtioGpu.h>
#include <Library/VirtioLib.h>
#include "VirtioGpu.h"
@@ -212,3 +211,349 @@ VirtioGpuExitBoot ( VgpuDev = Context;
VgpuDev->VirtIo->SetDeviceStatus (VgpuDev->VirtIo, 0);
}
+
+/**
+ Internal utility function that sends a request to the VirtIo GPU device
+ model, awaits the answer from the host, and returns a status.
+
+ @param[in,out] VgpuDev The VGPU_DEV object that represents the VirtIo GPU
+ device. The caller is responsible to have
+ successfully invoked VirtioGpuInit() on VgpuDev
+ previously, while VirtioGpuUninit() must not have
+ been called on VgpuDev.
+
+ @param[in] RequestType The type of the request. The caller is responsible
+ for providing a VirtioGpuCmd* RequestType which, on
+ success, elicits a VirtioGpuRespOkNodata response
+ from the host.
+
+ @param[in] Fence Whether to enable fencing for this request. Fencing
+ forces the host to complete the command before
+ producing a response. If Fence is TRUE, then
+ VgpuDev->FenceId is consumed, and incremented.
+
+ @param[in,out] Header Pointer to the caller-allocated request object. The
+ request must start with VIRTIO_GPU_CONTROL_HEADER.
+ This function overwrites all fields of Header before
+ submitting the request to the host:
+
+ - it sets Type from RequestType,
+
+ - it sets Flags and FenceId based on Fence,
+
+ - it zeroes CtxId and Padding.
+
+ @param[in] RequestSize Size of the entire caller-allocated request 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
+ code has been logged on the EFI_D_ERROR level.
+
+ @return Codes for unexpected errors in VirtIo
+ messaging.
+**/
+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
+ )
+{
+ DESC_INDICES Indices;
+ volatile VIRTIO_GPU_CONTROL_HEADER Response;
+ EFI_STATUS Status;
+ UINT32 ResponseSize;
+
+ //
+ // Initialize Header.
+ //
+ Header->Type = RequestType;
+ if (Fence) {
+ Header->Flags = VIRTIO_GPU_FLAG_FENCE;
+ Header->FenceId = VgpuDev->FenceId++;
+ } else {
+ Header->Flags = 0;
+ Header->FenceId = 0;
+ }
+ Header->CtxId = 0;
+ Header->Padding = 0;
+
+ ASSERT (RequestSize >= sizeof *Header);
+
+ //
+ // Compose the descriptor chain.
+ //
+ VirtioPrepare (&VgpuDev->Ring, &Indices);
+ VirtioAppendDesc (&VgpuDev->Ring, (UINTN)Header, RequestSize,
+ VRING_DESC_F_NEXT, &Indices);
+ VirtioAppendDesc (&VgpuDev->Ring, (UINTN)&Response, sizeof Response,
+ VRING_DESC_F_WRITE, &Indices);
+
+ //
+ // Send the command.
+ //
+ Status = VirtioFlush (VgpuDev->VirtIo, VIRTIO_GPU_CONTROL_QUEUE,
+ &VgpuDev->Ring, &Indices, &ResponseSize);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Parse the response.
+ //
+ if (ResponseSize != sizeof Response) {
+ DEBUG ((EFI_D_ERROR, "%a: malformed response to Request=0x%x\n",
+ __FUNCTION__, (UINT32)RequestType));
+ return EFI_PROTOCOL_ERROR;
+ }
+
+ if (Response.Type == VirtioGpuRespOkNodata) {
+ return EFI_SUCCESS;
+ }
+
+ DEBUG ((EFI_D_ERROR, "%a: Request=0x%x Response=0x%x\n", __FUNCTION__,
+ (UINT32)RequestType, Response.Type));
+ return EFI_DEVICE_ERROR;
+}
+
+/**
+ 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:
+
+ @param[in,out] VgpuDev The VGPU_DEV object that represents the VirtIo GPU
+ device. The caller is responsible to have
+ successfully invoked VirtioGpuInit() on VgpuDev
+ previously, while VirtioGpuUninit() must not have
+ been called on VgpuDev.
+
+ @retval EFI_INVALID_PARAMETER Invalid command-specific parameters were
+ detected by this driver.
+
+ @retval EFI_SUCCESS Operation successful.
+
+ @retval EFI_DEVICE_ERROR The host rejected the request. The host error
+ code has been logged on the EFI_D_ERROR level.
+
+ @return Codes for unexpected errors in VirtIo
+ messaging.
+
+ For the command-specific parameters, please consult the GPU Device section of
+ the VirtIo 1.0 specification (see references in
+ "OvmfPkg/Include/IndustryStandard/VirtioGpu.h").
+**/
+EFI_STATUS
+VirtioGpuResourceCreate2d (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 ResourceId,
+ IN VIRTIO_GPU_FORMATS Format,
+ IN UINT32 Width,
+ IN UINT32 Height
+ )
+{
+ volatile VIRTIO_GPU_RESOURCE_CREATE_2D Request;
+
+ if (ResourceId == 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Request.ResourceId = ResourceId;
+ Request.Format = (UINT32)Format;
+ Request.Width = Width;
+ Request.Height = Height;
+
+ return VirtioGpuSendCommand (
+ VgpuDev,
+ VirtioGpuCmdResourceCreate2d,
+ FALSE, // Fence
+ &Request.Header,
+ sizeof Request
+ );
+}
+
+EFI_STATUS
+VirtioGpuResourceUnref (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 ResourceId
+ )
+{
+ volatile VIRTIO_GPU_RESOURCE_UNREF Request;
+
+ if (ResourceId == 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Request.ResourceId = ResourceId;
+ Request.Padding = 0;
+
+ return VirtioGpuSendCommand (
+ VgpuDev,
+ VirtioGpuCmdResourceUnref,
+ FALSE, // Fence
+ &Request.Header,
+ sizeof Request
+ );
+}
+
+EFI_STATUS
+VirtioGpuResourceAttachBacking (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 ResourceId,
+ IN VOID *FirstBackingPage,
+ IN UINTN NumberOfPages
+ )
+{
+ volatile VIRTIO_GPU_RESOURCE_ATTACH_BACKING Request;
+
+ if (ResourceId == 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Request.ResourceId = ResourceId;
+ Request.NrEntries = 1;
+ Request.Entry.Addr = (UINTN)FirstBackingPage;
+ Request.Entry.Length = (UINT32)EFI_PAGES_TO_SIZE (NumberOfPages);
+ Request.Entry.Padding = 0;
+
+ return VirtioGpuSendCommand (
+ VgpuDev,
+ VirtioGpuCmdResourceAttachBacking,
+ FALSE, // Fence
+ &Request.Header,
+ sizeof Request
+ );
+}
+
+EFI_STATUS
+VirtioGpuResourceDetachBacking (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 ResourceId
+ )
+{
+ volatile VIRTIO_GPU_RESOURCE_DETACH_BACKING Request;
+
+ if (ResourceId == 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Request.ResourceId = ResourceId;
+ Request.Padding = 0;
+
+ //
+ // In this case, we set Fence to TRUE, because after this function returns,
+ // the caller might reasonably want to repurpose the backing pages
+ // immediately. Thus we should ensure that the host releases all references
+ // to the backing pages before we return.
+ //
+ return VirtioGpuSendCommand (
+ VgpuDev,
+ VirtioGpuCmdResourceDetachBacking,
+ TRUE, // Fence
+ &Request.Header,
+ sizeof Request
+ );
+}
+
+EFI_STATUS
+VirtioGpuSetScanout (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 X,
+ IN UINT32 Y,
+ IN UINT32 Width,
+ IN UINT32 Height,
+ IN UINT32 ScanoutId,
+ IN UINT32 ResourceId
+ )
+{
+ volatile VIRTIO_GPU_SET_SCANOUT Request;
+
+ //
+ // Unlike for most other commands, ResourceId=0 is valid; it
+ // is used to disable a scanout.
+ //
+ Request.Rectangle.X = X;
+ Request.Rectangle.Y = Y;
+ Request.Rectangle.Width = Width;
+ Request.Rectangle.Height = Height;
+ Request.ScanoutId = ScanoutId;
+ Request.ResourceId = ResourceId;
+
+ return VirtioGpuSendCommand (
+ VgpuDev,
+ VirtioGpuCmdSetScanout,
+ FALSE, // Fence
+ &Request.Header,
+ sizeof Request
+ );
+}
+
+EFI_STATUS
+VirtioGpuTransferToHost2d (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 X,
+ IN UINT32 Y,
+ IN UINT32 Width,
+ IN UINT32 Height,
+ IN UINT64 Offset,
+ IN UINT32 ResourceId
+ )
+{
+ volatile VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D Request;
+
+ if (ResourceId == 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Request.Rectangle.X = X;
+ Request.Rectangle.Y = Y;
+ Request.Rectangle.Width = Width;
+ Request.Rectangle.Height = Height;
+ Request.Offset = Offset;
+ Request.ResourceId = ResourceId;
+ Request.Padding = 0;
+
+ return VirtioGpuSendCommand (
+ VgpuDev,
+ VirtioGpuCmdTransferToHost2d,
+ FALSE, // Fence
+ &Request.Header,
+ sizeof Request
+ );
+}
+
+EFI_STATUS
+VirtioGpuResourceFlush (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 X,
+ IN UINT32 Y,
+ IN UINT32 Width,
+ IN UINT32 Height,
+ IN UINT32 ResourceId
+ )
+{
+ volatile VIRTIO_GPU_RESOURCE_FLUSH Request;
+
+ if (ResourceId == 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Request.Rectangle.X = X;
+ Request.Rectangle.Y = Y;
+ Request.Rectangle.Width = Width;
+ Request.Rectangle.Height = Height;
+ Request.ResourceId = ResourceId;
+ Request.Padding = 0;
+
+ return VirtioGpuSendCommand (
+ VgpuDev,
+ VirtioGpuCmdResourceFlush,
+ FALSE, // Fence
+ &Request.Header,
+ sizeof Request
+ );
+}
diff --git a/OvmfPkg/VirtioGpuDxe/VirtioGpu.h b/OvmfPkg/VirtioGpuDxe/VirtioGpu.h index 97767db..f883992 100644 --- a/OvmfPkg/VirtioGpuDxe/VirtioGpu.h +++ b/OvmfPkg/VirtioGpuDxe/VirtioGpu.h @@ -17,6 +17,7 @@ #ifndef _VIRTIO_GPU_DXE_H_
#define _VIRTIO_GPU_DXE_H_
+#include <IndustryStandard/VirtioGpu.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Protocol/VirtioDevice.h>
@@ -59,6 +60,11 @@ typedef struct { EFI_EVENT ExitBoot;
//
+ // Common running counter for all VirtIo GPU requests that ask for fencing.
+ //
+ UINT64 FenceId;
+
+ //
// The Child field references the GOP wrapper structure. If this pointer is
// NULL, then the hybrid driver has bound (i.e., started) the
// VIRTIO_DEVICE_PROTOCOL controller without producing the child GOP
@@ -171,4 +177,91 @@ VirtioGpuExitBoot ( IN VOID *Context
);
+/**
+ 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:
+
+ @param[in,out] VgpuDev The VGPU_DEV object that represents the VirtIo GPU
+ device. The caller is responsible to have
+ successfully invoked VirtioGpuInit() on VgpuDev
+ previously, while VirtioGpuUninit() must not have
+ been called on VgpuDev.
+
+ @retval EFI_INVALID_PARAMETER Invalid command-specific parameters were
+ detected by this driver.
+
+ @retval EFI_SUCCESS Operation successful.
+
+ @retval EFI_DEVICE_ERROR The host rejected the request. The host error
+ code has been logged on the EFI_D_ERROR level.
+
+ @return Codes for unexpected errors in VirtIo
+ messaging.
+
+ For the command-specific parameters, please consult the GPU Device section of
+ the VirtIo 1.0 specification (see references in
+ "OvmfPkg/Include/IndustryStandard/VirtioGpu.h").
+**/
+EFI_STATUS
+VirtioGpuResourceCreate2d (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 ResourceId,
+ IN VIRTIO_GPU_FORMATS Format,
+ IN UINT32 Width,
+ IN UINT32 Height
+ );
+
+EFI_STATUS
+VirtioGpuResourceUnref (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 ResourceId
+ );
+
+EFI_STATUS
+VirtioGpuResourceAttachBacking (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 ResourceId,
+ IN VOID *FirstBackingPage,
+ IN UINTN NumberOfPages
+ );
+
+EFI_STATUS
+VirtioGpuResourceDetachBacking (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 ResourceId
+ );
+
+EFI_STATUS
+VirtioGpuSetScanout (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 X,
+ IN UINT32 Y,
+ IN UINT32 Width,
+ IN UINT32 Height,
+ IN UINT32 ScanoutId,
+ IN UINT32 ResourceId
+ );
+
+EFI_STATUS
+VirtioGpuTransferToHost2d (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 X,
+ IN UINT32 Y,
+ IN UINT32 Width,
+ IN UINT32 Height,
+ IN UINT64 Offset,
+ IN UINT32 ResourceId
+ );
+
+EFI_STATUS
+VirtioGpuResourceFlush (
+ IN OUT VGPU_DEV *VgpuDev,
+ IN UINT32 X,
+ IN UINT32 Y,
+ IN UINT32 Width,
+ IN UINT32 Height,
+ IN UINT32 ResourceId
+ );
+
#endif // _VIRTIO_GPU_DXE_H_
|