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path: root/drivers/vdpa/vdpa.c
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Diffstat (limited to 'drivers/vdpa/vdpa.c')
-rw-r--r--drivers/vdpa/vdpa.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 3fc4525fc05c..1dc121a07a93 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -69,6 +69,7 @@ static void vdpa_release_dev(struct device *d)
* @config: the bus operations that is supported by this device
* @size: size of the parent structure that contains private data
* @name: name of the vdpa device; optional.
+ * @use_va: indicate whether virtual address must be used by this device
*
* Driver should use vdpa_alloc_device() wrapper macro instead of
* using this directly.
@@ -78,7 +79,8 @@ static void vdpa_release_dev(struct device *d)
*/
struct vdpa_device *__vdpa_alloc_device(struct device *parent,
const struct vdpa_config_ops *config,
- size_t size, const char *name)
+ size_t size, const char *name,
+ bool use_va)
{
struct vdpa_device *vdev;
int err = -EINVAL;
@@ -89,6 +91,10 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
if (!!config->dma_map != !!config->dma_unmap)
goto err;
+ /* It should only work for the device that use on-chip IOMMU */
+ if (use_va && !(config->dma_map || config->set_map))
+ goto err;
+
err = -ENOMEM;
vdev = kzalloc(size, GFP_KERNEL);
if (!vdev)
@@ -104,6 +110,7 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
vdev->index = err;
vdev->config = config;
vdev->features_valid = false;
+ vdev->use_va = use_va;
if (name)
err = dev_set_name(&vdev->dev, "%s", name);