BlockFront.h

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#include "XenPvBlkDxe.h"
 
#include <IndustryStandard/Xen/event_channel.h>
#include <IndustryStandard/Xen/io/blkif.h>
 
typedef struct _XEN_BLOCK_FRONT_DEVICE  XEN_BLOCK_FRONT_DEVICE;
typedef struct _XEN_BLOCK_FRONT_IO      XEN_BLOCK_FRONT_IO;
 
struct _XEN_BLOCK_FRONT_IO {
  XEN_BLOCK_FRONT_DEVICE    *Dev;
  UINT8                     *Buffer;
  UINTN                     Size;
  UINTN                     Sector; 
 
  grant_ref_t               GrantRef[BLKIF_MAX_SEGMENTS_PER_REQUEST];
  INT32                     NumRef;
 
  EFI_STATUS                Status;
};
 
typedef struct {
  UINT64     Sectors;
  UINT32     SectorSize;
  UINT32     VDiskInfo;
  BOOLEAN    ReadWrite;
  BOOLEAN    CdRom;
  BOOLEAN    FeatureBarrier;
  BOOLEAN    FeatureFlushCache;
} XEN_BLOCK_FRONT_MEDIA_INFO;
 
#define XEN_BLOCK_FRONT_SIGNATURE  SIGNATURE_32 ('X', 'p', 'v', 'B')
struct _XEN_BLOCK_FRONT_DEVICE {
  UINT32                        Signature;
  EFI_BLOCK_IO_PROTOCOL         BlockIo;
  domid_t                       DomainId;
 
  blkif_front_ring_t            Ring;
  grant_ref_t                   RingRef;
  evtchn_port_t                 EventChannel;
  blkif_vdev_t                  DeviceId;
 
  CONST CHAR8                   *NodeName;
  XEN_BLOCK_FRONT_MEDIA_INFO    MediaInfo;
 
  VOID                          *StateWatchToken;
 
  XENBUS_PROTOCOL               *XenBusIo;
};
 
#define XEN_BLOCK_FRONT_FROM_BLOCK_IO(b) \
  CR (b, XEN_BLOCK_FRONT_DEVICE, BlockIo, XEN_BLOCK_FRONT_SIGNATURE)
 
EFI_STATUS
XenPvBlockFrontInitialization (
  IN  XENBUS_PROTOCOL         *XenBusIo,
  IN  CONST CHAR8             *NodeName,
  OUT XEN_BLOCK_FRONT_DEVICE  **DevPtr
  );
 
VOID
XenPvBlockFrontShutdown (
  IN XEN_BLOCK_FRONT_DEVICE  *Dev
  );
 
VOID
XenPvBlockAsyncIo (
  IN OUT XEN_BLOCK_FRONT_IO  *IoData,
  IN     BOOLEAN             IsWrite
  );
 
EFI_STATUS
XenPvBlockIo (
  IN OUT XEN_BLOCK_FRONT_IO  *IoData,
  IN     BOOLEAN             IsWrite
  );
 
VOID
XenPvBlockAsyncIoPoll (
  IN XEN_BLOCK_FRONT_DEVICE  *Dev
  );
 
VOID
XenPvBlockSync (
  IN XEN_BLOCK_FRONT_DEVICE  *Dev
  );