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OvmfPkg/VirtioGpuDxe: implement EFI_GRAPHICS_OUTPUT_PROTOCOL

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In this patch we replace our "dummy" Graphics Output Protocol interface
with the real one. We exploit that EFI_GRAPHICS_OUTPUT_BLT_PIXEL and
VirtioGpuFormatB8G8R8X8Unorm have identical representations; this lets us
forego any pixel format conversions in the guest. For messaging the VirtIo
GPU device, we use the primitives introduced in the previous patch.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://tianocore.acgmultimedia.com/show_bug.cgi?id=66
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Laszlo Ersek
2016-08-17 22:45:02 +02:00
parent a66ea3b557
commit 8731debefd
4 changed files with 719 additions and 23 deletions
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64
OvmfPkg/VirtioGpuDxe/VirtioGpu.h
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@@ -20,6 +20,7 @@
#include <IndustryStandard/VirtioGpu.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Protocol/GraphicsOutput.h>
#include <Protocol/VirtioDevice.h>
//
@@ -114,9 +115,34 @@ struct VGPU_GOP_STRUCT {
// The Gop field is installed on the child handle as Graphics Output Protocol
// interface.
//
// For now it is just a placeholder.
EFI_GRAPHICS_OUTPUT_PROTOCOL Gop;
//
UINT8 Gop;
// Referenced by Gop.Mode, GopMode provides a summary about the supported
// graphics modes, and the current mode.
//
EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GopMode;
//
// Referenced by GopMode.Info, GopModeInfo provides detailed information
// about the current mode.
//
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION GopModeInfo;
//
// Identifier of the 2D host resource that is in use by this head (scanout)
// of the VirtIo GPU device. Zero until the first successful -- internal --
// Gop.SetMode() call, never zero afterwards.
//
UINT32 ResourceId;
//
// A number of whole pages providing the backing store for the 2D host
// resource identified by ResourceId above. NULL until the first successful
// -- internal -- Gop.SetMode() call, never NULL afterwards.
//
UINT32 *BackingStore;
UINTN NumberOfPages;
};
//
@@ -264,4 +290,38 @@ VirtioGpuResourceFlush (
IN UINT32 ResourceId
);
/**
Release guest-side and host-side resources that are related to an initialized
VGPU_GOP.Gop.
param[in,out] VgpuGop The VGPU_GOP object to release resources for.
On input, the caller is responsible for having called
VgpuGop->Gop.SetMode() at least once successfully.
(This is equivalent to the requirement that
VgpuGop->BackingStore be non-NULL. It is also
equivalent to the requirement that VgpuGop->ResourceId
be nonzero.)
On output, resources will be released, and
VgpuGop->BackingStore and VgpuGop->ResourceId will be
nulled.
param[in] DisableHead Whether this head (scanout) currently references the
resource identified by VgpuGop->ResourceId. Only pass
FALSE when VgpuGop->Gop.SetMode() calls this function
while switching between modes, and set it to TRUE
every other time.
**/
VOID
ReleaseGopResources (
IN OUT VGPU_GOP *VgpuGop,
IN BOOLEAN DisableHead
);
//
// Template for initializing VGPU_GOP.Gop.
//
extern CONST EFI_GRAPHICS_OUTPUT_PROTOCOL mGopTemplate;
#endif // _VIRTIO_GPU_DXE_H_