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authorJason Wang <jasowang@redhat.com>2023-01-19 09:15:23 +0300
committerMichael S. Tsirkin <mst@redhat.com>2023-02-21 03:26:58 +0300
commita1baedb11ed4008035cf72777a6cb572fc26184f (patch)
tree6788876b28ba33805a14f11c681cf8c23e65b5d1 /drivers/virtio
parent25da258fa61b1a902c781406a4e24a8284fc3d8a (diff)
downloadlinux-a1baedb11ed4008035cf72777a6cb572fc26184f.tar.xz
virtio-vdpa: support per vq dma device
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>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio_vdpa.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c
index 9670cc79371d..d7f5af62ddaa 100644
--- a/drivers/virtio/virtio_vdpa.c
+++ b/drivers/virtio/virtio_vdpa.c
@@ -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;