Commit 1d246927 authored by Xie Yongji's avatar Xie Yongji Committed by Michael S. Tsirkin
Browse files

vdpa: Add set/get_vq_affinity callbacks in vdpa_config_ops 



This introduces set/get_vq_affinity callbacks in
vdpa_config_ops to support virtqueue affinity
management for vdpa device drivers.

Signed-off-by: default avatarXie Yongji <xieyongji@bytedance.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Message-Id: <20230323053043.35-3-xieyongji@bytedance.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent aaf05948

drivers/virtio/virtio_vdpa.c

+28 −0
Original line number Diff line number Diff line
@@ -337,6 +337,32 @@ static const char *virtio_vdpa_bus_name(struct virtio_device *vdev) 
	return dev_name(&vdpa->dev);

}



static int virtio_vdpa_set_vq_affinity(struct virtqueue *vq,

				       const struct cpumask *cpu_mask)

{

	struct virtio_vdpa_device *vd_dev = to_virtio_vdpa_device(vq->vdev);

	struct vdpa_device *vdpa = vd_dev->vdpa;

	const struct vdpa_config_ops *ops = vdpa->config;

	unsigned int index = vq->index;



	if (ops->set_vq_affinity)

		return ops->set_vq_affinity(vdpa, index, cpu_mask);



	return 0;

}



static const struct cpumask *

virtio_vdpa_get_vq_affinity(struct virtio_device *vdev, int index)

{

	struct vdpa_device *vdpa = vd_get_vdpa(vdev);

	const struct vdpa_config_ops *ops = vdpa->config;



	if (ops->get_vq_affinity)

		return ops->get_vq_affinity(vdpa, index);



	return NULL;

}



static const struct virtio_config_ops virtio_vdpa_config_ops = {

	.get		= virtio_vdpa_get,

	.set		= virtio_vdpa_set,
@@ -349,6 +375,8 @@ static const struct virtio_config_ops virtio_vdpa_config_ops = { 
	.get_features	= virtio_vdpa_get_features,

	.finalize_features = virtio_vdpa_finalize_features,

	.bus_name	= virtio_vdpa_bus_name,

	.set_vq_affinity = virtio_vdpa_set_vq_affinity,

	.get_vq_affinity = virtio_vdpa_get_vq_affinity,

};



static void virtio_vdpa_release_dev(struct device *_d)

include/linux/vdpa.h

+13 −0
Original line number Diff line number Diff line
@@ -250,6 +250,15 @@ struct vdpa_map_file { 
 *				@vdev: vdpa device

 *				Returns the iova range supported by

 *				the device.

 * @set_vq_affinity:		Set the affinity of virtqueue (optional)

 *				@vdev: vdpa device

 *				@idx: virtqueue index

 *				@cpu_mask: the affinity mask

 *				Returns integer: success (0) or error (< 0)

 * @get_vq_affinity:		Get the affinity of virtqueue (optional)

 *				@vdev: vdpa device

 *				@idx: virtqueue index

 *				Returns the affinity mask

 * @set_group_asid:		Set address space identifier for a

 *				virtqueue group (optional)

 *				@vdev: vdpa device
@@ -340,6 +349,10 @@ struct vdpa_config_ops { 
			   const void *buf, unsigned int len);

	u32 (*get_generation)(struct vdpa_device *vdev);

	struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev);

	int (*set_vq_affinity)(struct vdpa_device *vdev, u16 idx,

			       const struct cpumask *cpu_mask);

	const struct cpumask *(*get_vq_affinity)(struct vdpa_device *vdev,

						 u16 idx);



	/* DMA ops */

	int (*set_map)(struct vdpa_device *vdev, unsigned int asid,