在 2021/9/29 下午2:11, Wu Zongyong 写道:
This attribute advertises the min value of virtqueue size. The value is
0 by default.
I think 0 is not a correct value. If I understand the spec correctly, it
should be 1.
Thanks
Signed-off-by: Wu Zongyong <wuzongyong@xxxxxxxxxxxxxxxxx>
---
drivers/vdpa/vdpa.c | 5 +++++
include/uapi/linux/vdpa.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 1dc121a07a93..6ed79fba33e4 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -492,6 +492,7 @@ vdpa_dev_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid, u32 seq
int flags, struct netlink_ext_ack *extack)
{
u16 max_vq_size;
+ u16 min_vq_size = 0;
u32 device_id;
u32 vendor_id;
void *hdr;
@@ -508,6 +509,8 @@ vdpa_dev_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid, u32 seq
device_id = vdev->config->get_device_id(vdev);
vendor_id = vdev->config->get_vendor_id(vdev);
max_vq_size = vdev->config->get_vq_num_max(vdev);
+ if (vdev->config->get_vq_num_min)
+ min_vq_size = vdev->config->get_vq_num_min(vdev);
err = -EMSGSIZE;
if (nla_put_string(msg, VDPA_ATTR_DEV_NAME, dev_name(&vdev->dev)))
@@ -520,6 +523,8 @@ vdpa_dev_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid, u32 seq
goto msg_err;
if (nla_put_u16(msg, VDPA_ATTR_DEV_MAX_VQ_SIZE, max_vq_size))
goto msg_err;
+ if (nla_put_u16(msg, VDPA_ATTR_DEV_MIN_VQ_SIZE, min_vq_size))
+ goto msg_err;
genlmsg_end(msg, hdr);
return 0;
diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h
index 66a41e4ec163..e3b87879514c 100644
--- a/include/uapi/linux/vdpa.h
+++ b/include/uapi/linux/vdpa.h
@@ -32,6 +32,7 @@ enum vdpa_attr {
VDPA_ATTR_DEV_VENDOR_ID, /* u32 */
VDPA_ATTR_DEV_MAX_VQS, /* u32 */
VDPA_ATTR_DEV_MAX_VQ_SIZE, /* u16 */
+ VDPA_ATTR_DEV_MIN_VQ_SIZE, /* u16 */
/* new attributes must be added above here */
VDPA_ATTR_MAX,
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