在 2021/10/15 下午3:14, Wu Zongyong 写道:
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: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Wu Zongyong <wuzongyong@xxxxxxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
---
include/linux/vdpa.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index a896ee021e5f..30864848950b 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -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);
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