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path: root/drivers/vdpa/vdpa.c
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Diffstat (limited to 'drivers/vdpa/vdpa.c')
-rw-r--r--drivers/vdpa/vdpa.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 76b2e31d6229..9348818b8bf9 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -1041,6 +1041,29 @@ static int vdpa_dev_blk_topology_config_fill(struct sk_buff *msg, u64 features,
return 0;
}
+static int vdpa_dev_blk_discard_config_fill(struct sk_buff *msg, u64 features,
+ const struct virtio_blk_config *config)
+{
+ u32 val_u32;
+
+ if ((features & BIT_ULL(VIRTIO_BLK_F_DISCARD)) == 0)
+ return 0;
+
+ val_u32 = __virtio32_to_cpu(true, config->max_discard_sectors);
+ if (nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_MAX_DISCARD_SEC, val_u32))
+ return -EMSGSIZE;
+
+ val_u32 = __virtio32_to_cpu(true, config->max_discard_seg);
+ if (nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_MAX_DISCARD_SEG, val_u32))
+ return -EMSGSIZE;
+
+ val_u32 = __virtio32_to_cpu(true, config->discard_sector_alignment);
+ if (nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_DISCARD_SEC_ALIGN, val_u32))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,
struct sk_buff *msg)
{
@@ -1073,6 +1096,9 @@ static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,
if (vdpa_dev_blk_topology_config_fill(msg, features_device, &config))
return -EMSGSIZE;
+ if (vdpa_dev_blk_discard_config_fill(msg, features_device, &config))
+ return -EMSGSIZE;
+
return 0;
}