projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 6b28fe9e | 1 | /** @file\r |
| 2 | \r | |
| 3 | Virtio Block Device specific type and macro definitions corresponding to the\r | |
| 4 | virtio-0.9.5 specification.\r | |
| 5 | \r | |
| 6 | Copyright (C) 2012, Red Hat, Inc.\r | |
| 7 | \r | |
| b26f0cf9 | 8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 6b28fe9e | 9 | \r |
| 10 | **/\r | |
| 11 | \r | |
| 12 | #ifndef _VIRTIO_BLK_H_\r | |
| 13 | #define _VIRTIO_BLK_H_\r | |
| 14 | \r | |
| 15 | #include <IndustryStandard/Virtio.h>\r | |
| 16 | \r | |
| 6b28fe9e | 17 | //\r |
| 18 | // virtio-0.9.5, Appendix D: Block Device\r | |
| 19 | //\r | |
| 20 | #pragma pack(1)\r | |
| 5cf69d48 | 21 | typedef struct {\r |
| ac0a286f MK |
22 | UINT8 PhysicalBlockExp; // # of logical blocks per physical block (log2)\r |
| 23 | UINT8 AlignmentOffset; // offset of first aligned logical block\r | |
| 24 | UINT16 MinIoSize; // suggested minimum I/O size in blocks\r | |
| 25 | UINT32 OptIoSize; // optimal (suggested maximum) I/O size in blocks\r | |
| 5cf69d48 LE |
26 | } VIRTIO_BLK_TOPOLOGY;\r |
| 27 | \r | |
| 6b28fe9e | 28 | typedef struct {\r |
| ac0a286f MK |
29 | UINT64 Capacity;\r |
| 30 | UINT32 SizeMax;\r | |
| 31 | UINT32 SegMax;\r | |
| 32 | UINT16 Cylinders;\r | |
| 33 | UINT8 Heads;\r | |
| 34 | UINT8 Sectors;\r | |
| 35 | UINT32 BlkSize;\r | |
| 36 | VIRTIO_BLK_TOPOLOGY Topology;\r | |
| 56f65ed8 | 37 | } VIRTIO_BLK_CONFIG;\r |
| 6b28fe9e | 38 | #pragma pack()\r |
| 39 | \r | |
| ac0a286f MK |
40 | #define OFFSET_OF_VBLK(Field) OFFSET_OF (VIRTIO_BLK_CONFIG, Field)\r |
| 41 | #define SIZE_OF_VBLK(Field) (sizeof ((VIRTIO_BLK_CONFIG *) 0)->Field)\r | |
| 6b28fe9e | 42 | \r |
| ac0a286f MK |
43 | #define VIRTIO_BLK_F_BARRIER BIT0\r |
| 44 | #define VIRTIO_BLK_F_SIZE_MAX BIT1\r | |
| 45 | #define VIRTIO_BLK_F_SEG_MAX BIT2\r | |
| 46 | #define VIRTIO_BLK_F_GEOMETRY BIT4\r | |
| 47 | #define VIRTIO_BLK_F_RO BIT5\r | |
| 48 | #define VIRTIO_BLK_F_BLK_SIZE BIT6 // treated as "logical block size" in\r | |
| 1d17076b LE |
49 | // practice; actual host side\r |
| 50 | // implementation negotiates "optimal"\r | |
| 5cf69d48 LE |
51 | // block size separately, via\r |
| 52 | // VIRTIO_BLK_F_TOPOLOGY\r | |
| ac0a286f MK |
53 | #define VIRTIO_BLK_F_SCSI BIT7\r |
| 54 | #define VIRTIO_BLK_F_FLUSH BIT9 // identical to "write cache enabled"\r | |
| 55 | #define VIRTIO_BLK_F_TOPOLOGY BIT10 // information on optimal I/O alignment\r | |
| 6b28fe9e | 56 | \r |
| 57 | //\r | |
| 58 | // We keep the status byte separate from the rest of the virtio-blk request\r | |
| 59 | // header. See description of historical scattering at the end of Appendix D:\r | |
| 60 | // we're going to put the status byte in a separate VRING_DESC.\r | |
| 61 | //\r | |
| 62 | #pragma pack(1)\r | |
| 63 | typedef struct {\r | |
| ac0a286f MK |
64 | UINT32 Type;\r |
| 65 | UINT32 IoPrio;\r | |
| 66 | UINT64 Sector;\r | |
| 6b28fe9e | 67 | } VIRTIO_BLK_REQ;\r |
| 68 | #pragma pack()\r | |
| 69 | \r | |
| ac0a286f MK |
70 | #define VIRTIO_BLK_T_IN 0x00000000\r |
| 71 | #define VIRTIO_BLK_T_OUT 0x00000001\r | |
| 72 | #define VIRTIO_BLK_T_SCSI_CMD 0x00000002\r | |
| 73 | #define VIRTIO_BLK_T_SCSI_CMD_OUT 0x00000003\r | |
| 74 | #define VIRTIO_BLK_T_FLUSH 0x00000004\r | |
| 75 | #define VIRTIO_BLK_T_FLUSH_OUT 0x00000005\r | |
| 76 | #define VIRTIO_BLK_T_BARRIER BIT31\r | |
| 6b28fe9e | 77 | \r |
| ac0a286f MK |
78 | #define VIRTIO_BLK_S_OK 0x00\r |
| 79 | #define VIRTIO_BLK_S_IOERR 0x01\r | |
| 80 | #define VIRTIO_BLK_S_UNSUPP 0x02\r | |
| 6b28fe9e | 81 | \r |
| 82 | #endif // _VIRTIO_BLK_H_\r |