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virtio-vdpa: support per vq dma device

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This patch adds the support of per vq dma device for virito-vDPA. vDPA
parents then are allowed to use different DMA devices. This is useful
for the parents that have software or emulated virtqueues.

Reviewed-by: Eli Cohen <elic@nvidia.com>
Tested-by: Eli Cohen <elic@nvidia.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20230119061525.75068-4-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2023-01-19 14:15:23 +08:00 committed by Michael S. Tsirkin
parent 25da258fa6
commit a1baedb11e
1 changed files with 10 additions and 3 deletions
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13
drivers/virtio/virtio_vdpa.c
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@ -135,6 +135,7 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index,
{
struct virtio_vdpa_device *vd_dev = to_virtio_vdpa_device(vdev);
struct vdpa_device *vdpa = vd_get_vdpa(vdev);
struct device *dma_dev;
const struct vdpa_config_ops *ops = vdpa->config;
struct virtio_vdpa_vq_info *info;
struct vdpa_callback cb;
@ -175,9 +176,15 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index,
/* Create the vring */
align = ops->get_vq_align(vdpa);
vq = vring_create_virtqueue(index, max_num, align, vdev,
true, may_reduce_num, ctx,
virtio_vdpa_notify, callback, name);
if (ops->get_vq_dma_dev)
dma_dev = ops->get_vq_dma_dev(vdpa, index);
else
dma_dev = vdpa_get_dma_dev(vdpa);
vq = vring_create_virtqueue_dma(index, max_num, align, vdev,
true, may_reduce_num, ctx,
virtio_vdpa_notify, callback,
name, dma_dev);
if (!vq) {
err = -ENOMEM;
goto error_new_virtqueue;