Commit c25a26e6 authored by Jason Wang's avatar Jason Wang Committed by Michael S. Tsirkin
Browse files

vdpa: introduce get_vq_notification method 



This patch introduces a new method in the vdpa_config_ops which
reports the physical address and the size of the doorbell for a
specific virtqueue.

This will be used by the future patches that maps doorbell to
userspace.

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200529080303.15449-4-jasowang@redhat.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 5ce995f3

include/linux/vdpa.h

+16 −0
Original line number Diff line number Diff line
@@ -17,6 +17,16 @@ struct vdpa_callback { 
	void *private;

};



/**

 * vDPA notification area

 * @addr: base address of the notification area

 * @size: size of the notification area

 */

struct vdpa_notification_area {

	resource_size_t addr;

	resource_size_t size;

};



/**

 * vDPA device - representation of a vDPA device

 * @dev: underlying device
@@ -73,6 +83,10 @@ struct vdpa_device { 
 *				@vdev: vdpa device

 *				@idx: virtqueue index

 *				Returns virtqueue state (last_avail_idx)

 * @get_vq_notification: 	Get the notification area for a virtqueue

 *				@vdev: vdpa device

 *				@idx: virtqueue index

 *				Returns the notifcation area

 * @get_vq_align:		Get the virtqueue align requirement

 *				for the device

 *				@vdev: vdpa device
@@ -162,6 +176,8 @@ struct vdpa_config_ops { 
	bool (*get_vq_ready)(struct vdpa_device *vdev, u16 idx);

	int (*set_vq_state)(struct vdpa_device *vdev, u16 idx, u64 state);

	u64 (*get_vq_state)(struct vdpa_device *vdev, u16 idx);

	struct vdpa_notification_area

	(*get_vq_notification)(struct vdpa_device *vdev, u16 idx);



	/* Device ops */

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

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