VirtioLib.h

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#ifndef _VIRTIO_LIB_H_
#define _VIRTIO_LIB_H_
 
#include <Protocol/VirtioDevice.h>
 
#include <IndustryStandard/Virtio.h>
 
EFI_STATUS
EFIAPI
VirtioRingInit (
  IN  VIRTIO_DEVICE_PROTOCOL  *VirtIo,
  IN  UINT16                  QueueSize,
  OUT VRING                   *Ring
  );
 
EFI_STATUS
EFIAPI
VirtioRingMap (
  IN  VIRTIO_DEVICE_PROTOCOL  *VirtIo,
  IN  VRING                   *Ring,
  OUT UINT64                  *RingBaseShift,
  OUT VOID                    **Mapping
  );
 
VOID
EFIAPI
VirtioRingUninit (
  IN     VIRTIO_DEVICE_PROTOCOL  *VirtIo,
  IN OUT VRING                   *Ring
  );
 
//
// Internal use structure for tracking the submission of a multi-descriptor
// request.
//
typedef struct {
  UINT16    HeadDescIdx;
  UINT16    NextDescIdx;
} DESC_INDICES;
 
VOID
EFIAPI
VirtioPrepare (
  IN OUT VRING         *Ring,
  OUT    DESC_INDICES  *Indices
  );
 
VOID
EFIAPI
VirtioAppendDesc (
  IN OUT VRING         *Ring,
  IN     UINT64        BufferDeviceAddress,
  IN     UINT32        BufferSize,
  IN     UINT16        Flags,
  IN OUT DESC_INDICES  *Indices
  );
 
EFI_STATUS
EFIAPI
VirtioFlush (
  IN     VIRTIO_DEVICE_PROTOCOL  *VirtIo,
  IN     UINT16                  VirtQueueId,
  IN OUT VRING                   *Ring,
  IN     DESC_INDICES            *Indices,
  OUT    UINT32                  *UsedLen    OPTIONAL
  );
 
EFI_STATUS
EFIAPI
Virtio10WriteFeatures (
  IN     VIRTIO_DEVICE_PROTOCOL  *VirtIo,
  IN     UINT64                  Features,
  IN OUT UINT8                   *DeviceStatus
  );
 
EFI_STATUS
EFIAPI
VirtioMapAllBytesInSharedBuffer (
  IN  VIRTIO_DEVICE_PROTOCOL  *VirtIo,
  IN  VIRTIO_MAP_OPERATION    Operation,
  IN  VOID                    *HostAddress,
  IN  UINTN                   NumberOfBytes,
  OUT EFI_PHYSICAL_ADDRESS    *DeviceAddress,
  OUT VOID                    **Mapping
  );
 
#endif // _VIRTIO_LIB_H_