projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| eaa7115d LE |
1 | /** @file\r |
| 2 | Type and macro definitions specific to the Virtio Filesystem device.\r | |
| 3 | \r | |
| 4 | At the time of this writing, the latest released Virtio specification (v1.1)\r | |
| 5 | does not include the virtio-fs device. The development version of the\r | |
| 6 | specification defines it however; see the latest version at\r | |
| 7 | <https://github.com/oasis-tcs/virtio-spec/blob/87fa6b5d8155/virtio-fs.tex>.\r | |
| 8 | \r | |
| 9 | This header file is minimal, and only defines the types and macros that are\r | |
| 10 | necessary for the OvmfPkg implementation.\r | |
| 11 | \r | |
| 12 | Copyright (C) 2020, Red Hat, Inc.\r | |
| 13 | \r | |
| 14 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 15 | **/\r | |
| 16 | \r | |
| 17 | #ifndef VIRTIO_FS_H_\r | |
| 18 | #define VIRTIO_FS_H_\r | |
| 19 | \r | |
| 20 | #include <IndustryStandard/Virtio.h>\r | |
| 21 | \r | |
| 22 | //\r | |
| 23 | // Lowest numbered queue for sending normal priority requests.\r | |
| 24 | //\r | |
| 25 | #define VIRTIO_FS_REQUEST_QUEUE 1\r | |
| 26 | \r | |
| 27 | //\r | |
| 28 | // Number of bytes in the "VIRTIO_FS_CONFIG.Tag" field.\r | |
| 29 | //\r | |
| 30 | #define VIRTIO_FS_TAG_BYTES 36\r | |
| 31 | \r | |
| 32 | //\r | |
| 33 | // Device configuration layout.\r | |
| 34 | //\r | |
| 35 | #pragma pack (1)\r | |
| 36 | typedef struct {\r | |
| 37 | //\r | |
| 38 | // The Tag field can be considered the filesystem label, or a mount point\r | |
| 39 | // hint. It is UTF-8 encoded, and padded to full size with NUL bytes. If the\r | |
| 40 | // encoded bytes take up the entire Tag field, then there is no NUL\r | |
| 41 | // terminator.\r | |
| 42 | //\r | |
| 43 | UINT8 Tag[VIRTIO_FS_TAG_BYTES];\r | |
| 44 | //\r | |
| 45 | // The total number of request virtqueues exposed by the device (i.e.,\r | |
| 46 | // excluding the "hiprio" queue).\r | |
| 47 | //\r | |
| 48 | UINT32 NumReqQueues;\r | |
| 49 | } VIRTIO_FS_CONFIG;\r | |
| 50 | #pragma pack ()\r | |
| 51 | \r | |
| 52 | #endif // VIRTIO_FS_H_\r |