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vdpa: introduce get_vq_dma_device()

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This patch introduces a new method to query the dma device that is use
for a specific virtqueue.

Reviewed-by: Eli Cohen <elic@nvidia.com>
Tested-by: Eli Cohen <elic@nvidia.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20230119061525.75068-3-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2023-01-19 14:15:22 +08:00 committed by Michael S. Tsirkin
parent 2713ea3c7d
commit 25da258fa6
1 changed files with 6 additions and 0 deletions
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6
include/linux/vdpa.h
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@ -285,6 +285,11 @@ struct vdpa_map_file {
* @iova: iova to be unmapped
* @size: size of the area
* Returns integer: success (0) or error (< 0)
* @get_vq_dma_dev: Get the dma device for a specific
* virtqueue (optional)
* @vdev: vdpa device
* @idx: virtqueue index
* Returns pointer to structure device or error (NULL)
* @free: Free resources that belongs to vDPA (optional)
* @vdev: vdpa device
*/
@ -345,6 +350,7 @@ struct vdpa_config_ops {
u64 iova, u64 size);
int (*set_group_asid)(struct vdpa_device *vdev, unsigned int group,
unsigned int asid);
struct device *(*get_vq_dma_dev)(struct vdpa_device *vdev, u16 idx);
/* Free device resources */
void (*free)(struct vdpa_device *vdev);