vdpa: Support reporting max device capabilities

Add max_supported_vqs and supported_features fields to struct vdpa_mgmt_dev. Upstream drivers need to feel these values according to the device capabilities. These values are reported back in a netlink message when showing management devices. Examples: $ auxiliary/mlx5_core.sf.1: supported_classes net max_supported_vqs 257 dev_features CSUM GUEST_CSUM MTU HOST_TSO4 HOST_TSO6 STATUS CTRL_VQ MQ \ CTRL_MAC_ADDR VERSION_1 ACCESS_PLATFORM $ vdpa -j mgmtdev show {"mgmtdev":{"auxiliary/mlx5_core.sf.1":{"supported_classes":["net"], \ "max_supported_vqs":257,"dev_features":["CSUM","GUEST_CSUM","MTU", \ "HOST_TSO4","HOST_TSO6","STATUS","CTRL_VQ","MQ","CTRL_MAC_ADDR", \ "VERSION_1","ACCESS_PLATFORM"]}}} $ vdpa -jp mgmtdev show { "mgmtdev": { "auxiliary/mlx5_core.sf.1": { "supported_classes": [ "net" ], "max_supported_vqs": 257, "dev_features": ["CSUM","GUEST_CSUM","MTU","HOST_TSO4", \ "HOST_TSO6","STATUS","CTRL_VQ","MQ", \ "CTRL_MAC_ADDR","VERSION_1","ACCESS_PLATFORM"] } } }

Eli Cohen committed 4 years ago

Commit cd2629f1 parent 37e07e73 files · +14 −0Browse files

Showing the changes to include/uapi/linux (1 of 3 files). Show all

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include/uapi/linux/vdpa.h+2−0

@@ -44,6 +44,8 @@ enum vdpa_attr { · 43 unmodified lines
44	VDPA_ATTR_DEV_NET_CFG_MTU, /* u16 */	44	VDPA_ATTR_DEV_NET_CFG_MTU, /* u16 */
45		45
46	VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */	46	VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */
		47	VDPA_ATTR_DEV_MGMTDEV_MAX_VQS, /* u32 */
		48	VDPA_ATTR_DEV_SUPPORTED_FEATURES, /* u64 */
47	/* new attributes must be added above here */	49	/* new attributes must be added above here */
48	VDPA_ATTR_MAX,	50	VDPA_ATTR_MAX,
49	};	51	};