1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2022 Intel Corporation
5 #ifndef _VDPA_BLK_COMPACT_H_
6 #define _VDPA_BLK_COMPACT_H_
11 #define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */
12 #define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */
13 #define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */
14 #define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available */
15 #define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */
16 #define VIRTIO_BLK_F_MQ 12 /* support more than one vq */
18 /* Legacy feature bits */
19 #define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */
20 #define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */
21 #define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in config */
23 #define VHOST_BLK_FEATURES_BASE ((1ULL << VHOST_F_LOG_ALL) | \
24 (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \
25 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
26 (1ULL << VIRTIO_RING_F_EVENT_IDX) | \
27 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
28 (1ULL << VIRTIO_F_VERSION_1))
30 #define VHOST_BLK_DISABLED_FEATURES_BASE ((1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \
31 (1ULL << VIRTIO_RING_F_EVENT_IDX))
33 #define VHOST_BLK_FEATURES (VHOST_BLK_FEATURES_BASE | \
34 (1ULL << VIRTIO_BLK_F_SIZE_MAX) | (1ULL << VIRTIO_BLK_F_SEG_MAX) | \
35 (1ULL << VIRTIO_BLK_F_GEOMETRY) | (1ULL << VIRTIO_BLK_F_BLK_SIZE) | \
36 (1ULL << VIRTIO_BLK_F_TOPOLOGY) | (1ULL << VIRTIO_BLK_F_BARRIER) | \
37 (1ULL << VIRTIO_BLK_F_SCSI) | (1ULL << VIRTIO_BLK_F_CONFIG_WCE) | \
38 (1ULL << VIRTIO_BLK_F_MQ))
40 /* Not supported features */
41 #define VHOST_BLK_DISABLED_FEATURES (VHOST_BLK_DISABLED_FEATURES_BASE | \
42 (1ULL << VIRTIO_BLK_F_GEOMETRY) | (1ULL << VIRTIO_BLK_F_BARRIER) | \
43 (1ULL << VIRTIO_BLK_F_SCSI) | (1ULL << VIRTIO_BLK_F_CONFIG_WCE))
45 /* Vhost-blk support protocol features */
46 #define VHOST_BLK_PROTOCOL_FEATURES \
47 ((1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD) | \
48 (1ULL << VHOST_USER_PROTOCOL_F_CONFIG))
50 #endif /* _VDPA_BLK_COMPACT_H_ */