Commit 3b970a58 authored by Wu Zongyong's avatar Wu Zongyong Committed by Michael S. Tsirkin
Browse files

vdpa: add new callback get_vq_num_min in vdpa_config_ops 



This callback is optional. For vdpa devices that not support to change
virtqueue size, get_vq_num_min and get_vq_num_max will return the same
value, so that users can choose a correct value for that device.

Suggested-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarWu Zongyong <wuzongyong@linux.alibaba.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/f4af5b0abd660d9a29ab6b2f67bd6df10284a230.1635493219.git.wuzongyong@linux.alibaba.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 5bbfea1e

include/linux/vdpa.h

+4 −0
Original line number Diff line number Diff line
@@ -171,6 +171,9 @@ struct vdpa_map_file { 
 * @get_vq_num_max:		Get the max size of virtqueue

 *				@vdev: vdpa device

 *				Returns u16: max size of virtqueue

 * @get_vq_num_min:		Get the min size of virtqueue (optional)

 *				@vdev: vdpa device

 *				Returns u16: min size of virtqueue

 * @get_device_id:		Get virtio device id

 *				@vdev: vdpa device

 *				Returns u32: virtio device id
@@ -266,6 +269,7 @@ struct vdpa_config_ops { 
	void (*set_config_cb)(struct vdpa_device *vdev,

			      struct vdpa_callback *cb);

	u16 (*get_vq_num_max)(struct vdpa_device *vdev);

	u16 (*get_vq_num_min)(struct vdpa_device *vdev);

	u32 (*get_device_id)(struct vdpa_device *vdev);

	u32 (*get_vendor_id)(struct vdpa_device *vdev);

	u8 (*get_status)(struct vdpa_device *vdev);