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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 |
| 8 | This program and the accompanying materials are licensed and made available\r |
| 9 | under the terms and conditions of the BSD License which accompanies this\r |
| 10 | distribution. The full text of the license may be found at\r |
| 11 | http://opensource.org/licenses/bsd-license.php\r |
| 12 | \r |
| 13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r |
| 14 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 15 | \r |
| 16 | **/\r |
| 17 | \r |
| 18 | #ifndef _VIRTIO_BLK_H_\r |
| 19 | #define _VIRTIO_BLK_H_\r |
| 20 | \r |
| 21 | #include <IndustryStandard/Virtio.h>\r |
| 22 | \r |
| 23 | \r |
| 24 | //\r |
| 25 | // virtio-0.9.5, Appendix D: Block Device\r |
| 26 | //\r |
| 27 | #pragma pack(1)\r |
| 28 | typedef struct {\r |
| 29 | VIRTIO_HDR Generic;\r |
| 30 | UINT64 VhdrCapacity;\r |
| 31 | UINT32 VhdrSizeMax;\r |
| 32 | UINT32 VhdrSegMax;\r |
| 33 | UINT16 VhdrCylinders;\r |
| 34 | UINT8 VhdrHeads;\r |
| 35 | UINT8 VhdrSectors;\r |
| 36 | UINT32 VhdrBlkSize;\r |
| 37 | } VBLK_HDR;\r |
| 38 | #pragma pack()\r |
| 39 | \r |
| 40 | #define OFFSET_OF_VBLK(Field) OFFSET_OF (VBLK_HDR, Field)\r |
| 41 | #define SIZE_OF_VBLK(Field) (sizeof ((VBLK_HDR *) 0)->Field)\r |
| 42 | \r |
| 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 |
| 49 | // practice; actual host side implementation\r |
| 50 | // negotiates "optimal" block size\r |
| 51 | // separately\r |
| 52 | #define VIRTIO_BLK_F_SCSI BIT7\r |
| 53 | #define VIRTIO_BLK_F_FLUSH BIT9 // identical to "write cache enabled"\r |
| 54 | \r |
| 55 | //\r |
| 56 | // We keep the status byte separate from the rest of the virtio-blk request\r |
| 57 | // header. See description of historical scattering at the end of Appendix D:\r |
| 58 | // we're going to put the status byte in a separate VRING_DESC.\r |
| 59 | //\r |
| 60 | #pragma pack(1)\r |
| 61 | typedef struct {\r |
| 62 | UINT32 Type;\r |
| 63 | UINT32 IoPrio;\r |
| 64 | UINT64 Sector;\r |
| 65 | } VIRTIO_BLK_REQ;\r |
| 66 | #pragma pack()\r |
| 67 | \r |
| 68 | #define VIRTIO_BLK_T_IN 0x00000000\r |
| 69 | #define VIRTIO_BLK_T_OUT 0x00000001\r |
| 70 | #define VIRTIO_BLK_T_SCSI_CMD 0x00000002\r |
| 71 | #define VIRTIO_BLK_T_SCSI_CMD_OUT 0x00000003\r |
| 72 | #define VIRTIO_BLK_T_FLUSH 0x00000004\r |
| 73 | #define VIRTIO_BLK_T_FLUSH_OUT 0x00000005\r |
| 74 | #define VIRTIO_BLK_T_BARRIER BIT31\r |
| 75 | \r |
| 76 | #define VIRTIO_BLK_S_OK 0x00\r |
| 77 | #define VIRTIO_BLK_S_IOERR 0x01\r |
| 78 | #define VIRTIO_BLK_S_UNSUPP 0x02\r |
| 79 | \r |
| 80 | #endif // _VIRTIO_BLK_H_\r |
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