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vdpa: introduce config op to get valid iova range

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This patch introduce a config op to get valid iova range from the vDPA
device.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20201023090043.14430-2-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2020-10-23 17:00:41 +08:00 committed by Michael S. Tsirkin
parent 88a0d60c64
commit 3f1b623a1b
1 changed files with 15 additions and 0 deletions
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15
include/linux/vdpa.h
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@ -52,6 +52,16 @@ struct vdpa_device {
int nvqs;
};
/**
* vDPA IOVA range - the IOVA range support by the device
* @first: start of the IOVA range
* @last: end of the IOVA range
*/
struct vdpa_iova_range {
u64 first;
u64 last;
};
/**
* vDPA_config_ops - operations for configuring a vDPA device.
* Note: vDPA device drivers are required to implement all of the
@ -151,6 +161,10 @@ struct vdpa_device {
* @get_generation: Get device config generation (optional)
* @vdev: vdpa device
* Returns u32: device generation
* @get_iova_range: Get supported iova range (optional)
* @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)
@ -216,6 +230,7 @@ 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);