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Message-Id: <1692063807-5018-2-git-send-email-si-wei.liu@oracle.com>
Date: Mon, 14 Aug 2023 18:43:24 -0700
From: Si-Wei Liu <si-wei.liu@...cle.com>
To: jasowang@...hat.com
Cc: eperezma@...hat.com, gal@...dia.com, linux-kernel@...r.kernel.org,
mst@...hat.com, si-wei.liu@...cle.com,
virtualization@...ts.linux-foundation.org,
xuanzhuo@...ux.alibaba.com
Subject: [PATCH RFC 1/4] vdpa: introduce .reset_map operation callback
Signed-off-by: Si-Wei Liu <si-wei.liu@...cle.com>
---
include/linux/vdpa.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index db1b0ea..3a3878d 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -314,6 +314,12 @@ struct vdpa_map_file {
* @iova: iova to be unmapped
* @size: size of the area
* Returns integer: success (0) or error (< 0)
+ * @reset_map: Reset device memory mapping (optional)
+ * Needed for device that using device
+ * specific DMA translation (on-chip IOMMU)
+ * @vdev: vdpa device
+ * @asid: address space identifier
+ * Returns integer: success (0) or error (< 0)
* @get_vq_dma_dev: Get the dma device for a specific
* virtqueue (optional)
* @vdev: vdpa device
@@ -390,6 +396,7 @@ 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 (*reset_map)(struct vdpa_device *vdev, unsigned int asid);
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);
--
1.8.3.1
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