diff options
Diffstat (limited to 'OvmfPkg/Include/IndustryStandard/VirtioBlk.h')
| -rw-r--r-- | OvmfPkg/Include/IndustryStandard/VirtioBlk.h | 40 |
1 files changed, 25 insertions, 15 deletions
diff --git a/OvmfPkg/Include/IndustryStandard/VirtioBlk.h b/OvmfPkg/Include/IndustryStandard/VirtioBlk.h index 55f6548ed..2ce528a12 100644 --- a/OvmfPkg/Include/IndustryStandard/VirtioBlk.h +++ b/OvmfPkg/Include/IndustryStandard/VirtioBlk.h @@ -26,30 +26,40 @@ //
#pragma pack(1)
typedef struct {
- UINT64 Capacity; - UINT32 SizeMax; - UINT32 SegMax; - UINT16 Cylinders; - UINT8 Heads; - UINT8 Sectors; - UINT32 BlkSize; -} VIRTIO_BLK_CONFIG; + 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;
+ UINT32 SegMax;
+ UINT16 Cylinders;
+ UINT8 Heads;
+ UINT8 Sectors;
+ UINT32 BlkSize;
+ VIRTIO_BLK_TOPOLOGY Topology;
+} VIRTIO_BLK_CONFIG;
#pragma pack()
-#define OFFSET_OF_VBLK(Field) OFFSET_OF (VIRTIO_BLK_CONFIG, Field) -#define SIZE_OF_VBLK(Field) (sizeof ((VIRTIO_BLK_CONFIG *) 0)->Field) +#define OFFSET_OF_VBLK(Field) OFFSET_OF (VIRTIO_BLK_CONFIG, Field)
+#define SIZE_OF_VBLK(Field) (sizeof ((VIRTIO_BLK_CONFIG *) 0)->Field)
#define VIRTIO_BLK_F_BARRIER BIT0
#define VIRTIO_BLK_F_SIZE_MAX BIT1
#define VIRTIO_BLK_F_SEG_MAX BIT2
#define VIRTIO_BLK_F_GEOMETRY BIT4
#define VIRTIO_BLK_F_RO BIT5
-#define VIRTIO_BLK_F_BLK_SIZE BIT6 // treated as "logical block size" in
- // practice; actual host side implementation
- // negotiates "optimal" block size
- // separately
+#define VIRTIO_BLK_F_BLK_SIZE BIT6 // treated as "logical block size" in
+ // practice; actual host side
+ // implementation negotiates "optimal"
+ // 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_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
|