From: Si-Wei Liu <si-wei.liu@oracle.com>
To: eperezma@redhat.com, jasowang@redhat.com, mst@redhat.com,
xuanzhuo@linux.alibaba.com, dtatulea@nvidia.com
Cc: virtualization@lists.linux-foundation.org
Subject: [PATCH RFC v2 1/4] vdpa: introduce .reset_map operation callback
Date: Sat, 9 Sep 2023 06:31:56 -0700 [thread overview]
Message-ID: <1694266319-32287-2-git-send-email-si-wei.liu@oracle.com> (raw)
In-Reply-To: <1694266319-32287-1-git-send-email-si-wei.liu@oracle.com>
On-chip IOMMU parent driver could use it to restore memory mapping
to the initial state.
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
---
include/linux/vdpa.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 17a4efa..daecf55 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -324,6 +324,12 @@ 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
@@ -401,6 +407,7 @@ 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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next prev parent reply other threads:[~2023-09-09 13:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-09 13:31 [PATCH RFC v2 0/4] vdpa: decouple reset of iotlb mapping from device reset Si-Wei Liu
2023-09-09 13:31 ` Si-Wei Liu [this message]
2023-09-11 3:42 ` [PATCH RFC v2 1/4] vdpa: introduce .reset_map operation callback Jason Wang
2023-09-11 23:31 ` Si-Wei Liu
2023-09-12 6:23 ` Jason Wang
2023-09-15 5:38 ` Si-Wei Liu
2023-09-09 13:31 ` [PATCH RFC v2 2/4] vdpa/mlx5: implement .reset_map driver op Si-Wei Liu
2023-09-09 13:31 ` [PATCH RFC v2 3/4] vhost-vdpa: should restore 1:1 dma mapping before detaching driver Si-Wei Liu
2023-09-09 13:31 ` [PATCH RFC v2 4/4] vhost-vdpa: introduce IOTLB_PERSIST backend feature bit Si-Wei Liu
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