This patch introduce a config op to get valid iova range from the vDPA
device.
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
include/linux/vdpa.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 239db794357c..b7633ed2500c 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -41,6 +41,16 @@ struct vdpa_device {
unsigned int index;
};
+/**
+ * vDPA IOVA range - the IOVA range support by the device
+ * @start: start of the IOVA range
+ * @end: end of the IOVA range
+ */
+struct vdpa_iova_range {
+ u64 start;
+ u64 end;
+};
+
/**
* vDPA_config_ops - operations for configuring a vDPA device.
* Note: vDPA device drivers are required to implement all of the
@@ -134,6 +144,9 @@ struct vdpa_device {
* @get_generation: Get device config generation (optional)
* @vdev: vdpa device
* Returns u32: device generation
+ * @get_iova_range: Get supported iova range (on-chip IOMMU)
+ * @vdev: vdpa device
+ * Returns the iova range supported by the device
* @set_map: Set device memory mapping (optional)
* Needed for device that using device
* specific DMA translation (on-chip IOMMU)
@@ -195,6 +208,7 @@ struct vdpa_config_ops {
void (*set_config)(struct vdpa_device *vdev, unsigned int offset,
const void *buf, unsigned int len);
u32 (*get_generation)(struct vdpa_device *vdev);
+ struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev);
/* DMA ops */
int (*set_map)(struct vdpa_device *vdev, struct vhost_iotlb *iotlb);
--
2.20.1
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