netdev - [RFC PATCH 10/24] vdpa: introduce config operations for associating ASID to a virtqueue group

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Date:   Thu, 24 Sep 2020 11:21:11 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     mst@...hat.com, jasowang@...hat.com
Cc:     lulu@...hat.com, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, rob.miller@...adcom.com,
        lingshan.zhu@...el.com, eperezma@...hat.com, hanand@...inx.com,
        mhabets@...arflare.com, eli@...lanox.com, amorenoz@...hat.com,
        maxime.coquelin@...hat.com, stefanha@...hat.com,
        sgarzare@...hat.com
Subject: [RFC PATCH 10/24] vdpa: introduce config operations for associating ASID to a virtqueue group

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 <jasowang@...hat.com>
---
 include/linux/vdpa.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 1e1163daa352..e2394995a3cd 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -160,6 +160,12 @@ struct vdpa_device {
  * @get_generation:		Get device config generation (optional)
  *				@vdev: vdpa device
  *				Returns u32: device generation
+ * @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)
@@ -237,6 +243,10 @@ struct vdpa_config_ops {
 		       u64 iova, u64 size, u64 pa, u32 perm);
 	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);
-- 
2.20.1