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vdpa: Add set/get_vq_affinity callbacks in vdpa_config_ops

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

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20230323053043.35-3-xieyongji@bytedance.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xie Yongji 2023-03-23 13:30:34 +08:00 • committed by Michael S. Tsirkin
parent aaf0594829
commit 1d24692732
2 changed files with 41 additions and 0 deletions
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28
drivers/virtio/virtio_vdpa.c
View file

@ -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)

13
include/linux/vdpa.h
View file

@ -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,