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OvmfPkg: IndustryStandard/VirtioBlk: introduce topology-related definitions 

Based on
<https://tools.oasis-open.org/version-control/browse/wsvn/virtio/virtio-v1.0-wd01-part1-specification.txt?rev=159>,
which is the last text format revision.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15002 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Laszlo Ersek 2013-12-18 19:57:28 +00:00 committed by jljusten
parent 1d17076b00
commit 5cf69d4836
1 changed files with 11 additions and 1 deletions
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12
OvmfPkg/Include/IndustryStandard/VirtioBlk.h
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@ -25,6 +25,13 @@
// virtio-0.9.5, Appendix D: Block Device
//
#pragma pack(1)
typedef struct {
UINT8 PhysicalBlockExp; // # of logical blocks per physical block (log2)
UINT8 AlignmentOffset; // offset of first aligned logical block
UINT16 MinIoSize; // suggested minimum I/O size in blocks
UINT32 OptIoSize; // optimal (suggested maximum) I/O size in blocks
} VIRTIO_BLK_TOPOLOGY;
typedef struct {
UINT64 Capacity;
UINT32 SizeMax;
@ -33,6 +40,7 @@ typedef struct {
UINT8 Heads;
UINT8 Sectors;
UINT32 BlkSize;
VIRTIO_BLK_TOPOLOGY Topology;
} VIRTIO_BLK_CONFIG;
#pragma pack()
@ -47,9 +55,11 @@ typedef struct {
#define VIRTIO_BLK_F_BLK_SIZE BIT6 // treated as "logical block size" in
// practice; actual host side
// implementation negotiates "optimal"
// block size separately
// block size separately, via
// VIRTIO_BLK_F_TOPOLOGY
#define VIRTIO_BLK_F_SCSI BIT7
#define VIRTIO_BLK_F_FLUSH BIT9 // identical to "write cache enabled"
#define VIRTIO_BLK_F_TOPOLOGY BIT10 // information on optimal I/O alignment
//
// We keep the status byte separate from the rest of the virtio-blk request