vdpa: add new attribute VDPA_ATTR_DEV_MIN_VQ_SIZE

This attribute advertises the min value of virtqueue size. The value is 1 by default.

Wu Zongyong committed 5 years ago

Commit e47be841 parent 30a03df2 files · +6 −0Browse files

Unified · Split

2 files

@@ -500,6 +500,7 @@ vdpa_dev_fill(struct vdpa_device vdev, struct sk_buff msg, u32 portid, u32 seq · 499 unmodified lines
500	500	int flags, struct netlink_ext_ack *extack)
501	501	{
502	502	u16 max_vq_size;
	503	+ u16 min_vq_size = 1;
503	504	u32 device_id;
504	505	u32 vendor_id;
505	506	void *hdr;
@@ -516,6 +517,8 @@ vdpa_dev_fill(struct vdpa_device vdev, struct sk_buff msg, u32 portid, u32 seq · 10 unmodified lines
516	517	device_id = vdev->config->get_device_id(vdev);
517	518	vendor_id = vdev->config->get_vendor_id(vdev);
518	519	max_vq_size = vdev->config->get_vq_num_max(vdev);
	520	+ if (vdev->config->get_vq_num_min)
	521	+ min_vq_size = vdev->config->get_vq_num_min(vdev);
519	522
520	523	err = -EMSGSIZE;
521	524	if (nla_put_string(msg, VDPA_ATTR_DEV_NAME, dev_name(&vdev->dev)))
@@ -528,6 +531,8 @@ vdpa_dev_fill(struct vdpa_device vdev, struct sk_buff msg, u32 portid, u32 seq · 6 unmodified lines
528	531	goto msg_err;
529	532	if (nla_put_u16(msg, VDPA_ATTR_DEV_MAX_VQ_SIZE, max_vq_size))
530	533	goto msg_err;
	534	+ if (nla_put_u16(msg, VDPA_ATTR_DEV_MIN_VQ_SIZE, min_vq_size))
	535	+ goto msg_err;
531	536
532	537	genlmsg_end(msg, hdr);
533	538	return 0;

@@ -32,6 +32,7 @@ enum vdpa_attr { · 31 unmodified lines
32	32	VDPA_ATTR_DEV_VENDOR_ID, /* u32 */
33	33	VDPA_ATTR_DEV_MAX_VQS, /* u32 */
34	34	VDPA_ATTR_DEV_MAX_VQ_SIZE, /* u16 */
	35	+ VDPA_ATTR_DEV_MIN_VQ_SIZE, /* u16 */
35	36
36	37	/* new attributes must be added above here */
37	38	VDPA_ATTR_MAX,

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