mirror of https://github.com/acidanthera/audk.git
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
|
/** @file
|
||
|
|
Type and macro definitions specific to the Virtio Filesystem device.
|
||
|
|
|
||
|
|
At the time of this writing, the latest released Virtio specification (v1.1)
|
||
|
|
does not include the virtio-fs device. The development version of the
|
||
|
|
specification defines it however; see the latest version at
|
||
|
|
<https://github.com/oasis-tcs/virtio-spec/blob/87fa6b5d8155/virtio-fs.tex>.
|
||
|
|
|
||
|
|
This header file is minimal, and only defines the types and macros that are
|
||
|
|
necessary for the OvmfPkg implementation.
|
||
|
|
|
||
|
|
Copyright (C) 2020, Red Hat, Inc.
|
||
|
|
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
**/
|
||
|
|
|
||
|
|
#ifndef VIRTIO_FS_H_
|
||
|
|
#define VIRTIO_FS_H_
|
||
|
|
|
||
|
|
#include <IndustryStandard/Virtio.h>
|
||
|
|
|
||
|
|
//
|
||
|
|
// Lowest numbered queue for sending normal priority requests.
|
||
|
|
//
|
||
|
|
#define VIRTIO_FS_REQUEST_QUEUE 1
|
||
|
|
|
||
|
|
//
|
||
|
|
// Number of bytes in the "VIRTIO_FS_CONFIG.Tag" field.
|
||
|
|
//
|
||
|
|
#define VIRTIO_FS_TAG_BYTES 36
|
||
|
|
|
||
|
|
//
|
||
|
|
// Device configuration layout.
|
||
|
|
//
|
||
|
|
#pragma pack (1)
|
||
|
|
typedef struct {
|
||
|
|
//
|
||
|
|
// The Tag field can be considered the filesystem label, or a mount point
|
||
|
|
// hint. It is UTF-8 encoded, and padded to full size with NUL bytes. If the
|
||
|
|
// encoded bytes take up the entire Tag field, then there is no NUL
|
||
|
|
// terminator.
|
||
|
|
//
|
||
|
|
UINT8 Tag[VIRTIO_FS_TAG_BYTES];
|
||
|
|
//
|
||
|
|
// The total number of request virtqueues exposed by the device (i.e.,
|
||
|
|
// excluding the "hiprio" queue).
|
||
|
|
//
|
||
|
|
UINT32 NumReqQueues;
|
||
|
|
} VIRTIO_FS_CONFIG;
|
||
|
|
#pragma pack ()
|
||
|
|
|
||
|
|
#endif // VIRTIO_FS_H_
|