[v2,07/19] vdpa: introduce config operations for associating ASID to a virtqueue group

Commit Message

Gautam Dawar March 30, 2022, 6:03 p.m. UTC

This patch introduces a new bus operation to allow the vDPA bus driver
to associate an ASID to a virtqueue group.

Signed-off-by: Jason Wang <[e-mail]>
Signed-off-by: Gautam Dawar <[e-mail]>
---
 include/linux/vdpa.h | 8 ++++++++
 1 file changed, 8 insertions(+)

Patch

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 7ab0e29ae466..f4d8c916e0d8 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -240,6 +240,12 @@  struct vdpa_map_file {
  *				@vdev: vdpa device
  *				Returns the iova range supported by
  *				the device.
+ * @set_group_asid:		Set address space identifier for a
+ *				virtqueue group
+ *				@vdev: vdpa device
+ *				@group: virtqueue group
+ *				@asid: address space id for this group
+ *				Returns integer: success (0) or error (< 0)
  * @set_map:			Set device memory mapping (optional)
  *				Needed for device that using device
  *				specific DMA translation (on-chip IOMMU)
@@ -322,6 +328,8 @@  struct vdpa_config_ops {
 		       u64 iova, u64 size, u64 pa, u32 perm, void *opaque);
 	int (*dma_unmap)(struct vdpa_device *vdev, unsigned int asid,
 			 u64 iova, u64 size);
+	int (*set_group_asid)(struct vdpa_device *vdev, unsigned int group,
+			      unsigned int asid);
 
 	/* Free device resources */
 	void (*free)(struct vdpa_device *vdev);