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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: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200529080303.15449-4-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2020-05-29 16:03:00 +08:00 committed by Michael S. Tsirkin
parent 5ce995f313
commit c25a26e653
1 changed files with 16 additions and 0 deletions
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16
include/linux/vdpa.h
View File

@ -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);