examples/vdpa/vdpa_blk_compact.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2022 Intel Corporation
   3  */
   4
   5 #ifndef _VDPA_BLK_COMPACT_H_
   6 #define _VDPA_BLK_COMPACT_H_
   7
   8 #include <rte_vhost.h>
   9
  10 /* Feature bits */
  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 */
  17
  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 */
  22
  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))
  29
  30 #define VHOST_BLK_DISABLED_FEATURES_BASE ((1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \
  31         (1ULL << VIRTIO_RING_F_EVENT_IDX))
  32
  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))
  39
  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))
  44
  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))
  49
  50 #endif /* _VDPA_BLK_COMPACT_H_ */