diff options
| author | Zhu Lingshan <lingshan.zhu@intel.com> | 2024-02-19 02:56:02 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-03-19 02:45:51 -0400 |
| commit | c9d989b4ababe3ec7291b204f365eaadec0afa26 (patch) | |
| tree | 9277cb8ef09d9d02b903c25dde66b9dcc772c94a /drivers/vdpa | |
| parent | 54fb04b02efd8f56e388443d5f9e03e68eef48e6 (diff) | |
vDPA: report virtio-block topology info to user space
This commit allows vDPA reporting topology information of
virtio-blk devices to user space, includes:
1) the number of logical blocks per physical block
2) offset of first aligned logical block
3) suggested minimum I/O size in blocks
4) optimal (suggested maximum) I/O size in blocks
Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-7-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
| -rw-r--r-- | drivers/vdpa/vdpa.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index 4c348da1f2f7..76b2e31d6229 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -1012,6 +1012,35 @@ static int vdpa_dev_blk_mq_config_fill(struct sk_buff *msg, u64 features, return nla_put_u16(msg, VDPA_ATTR_DEV_BLK_CFG_NUM_QUEUES, val_u16); } +static int vdpa_dev_blk_topology_config_fill(struct sk_buff *msg, u64 features, + const struct virtio_blk_config *config) +{ + u16 min_io_size; + u32 opt_io_size; + + if ((features & BIT_ULL(VIRTIO_BLK_F_TOPOLOGY)) == 0) + return 0; + + min_io_size = __virtio16_to_cpu(true, config->min_io_size); + opt_io_size = __virtio32_to_cpu(true, config->opt_io_size); + + if (nla_put_u8(msg, VDPA_ATTR_DEV_BLK_CFG_PHY_BLK_EXP, + config->physical_block_exp)) + return -EMSGSIZE; + + if (nla_put_u8(msg, VDPA_ATTR_DEV_BLK_CFG_ALIGN_OFFSET, + config->alignment_offset)) + return -EMSGSIZE; + + if (nla_put_u16(msg, VDPA_ATTR_DEV_BLK_CFG_MIN_IO_SIZE, min_io_size)) + return -EMSGSIZE; + + if (nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_OPT_IO_SIZE, opt_io_size)) + return -EMSGSIZE; + + return 0; +} + static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev, struct sk_buff *msg) { @@ -1041,6 +1070,9 @@ static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev, if (vdpa_dev_blk_mq_config_fill(msg, features_device, &config)) return -EMSGSIZE; + if (vdpa_dev_blk_topology_config_fill(msg, features_device, &config)) + return -EMSGSIZE; + return 0; } |