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vdpa: Introduce and use vdpa device get, set config helpers

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Subsequent patches enable get and set configuration either
via management device or via vdpa device' config ops.

This requires synchronization between multiple callers to get and set
config callbacks. Features setting also influence the layout of the
configuration fields endianness.

To avoid exposing synchronization primitives to callers, introduce
helper for setting the configuration and use it.

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20211026175519.87795-2-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Parav Pandit
2021-10-26 20:55:12 +03:00
committed by Michael S. Tsirkin
parent c57911ebfb
commit 6dbb1f1687
4 changed files with 42 additions and 19 deletions
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3
drivers/virtio/virtio_vdpa.c
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@@ -65,9 +65,8 @@ static void virtio_vdpa_set(struct virtio_device *vdev, unsigned offset,
const void *buf, unsigned len)
{
struct vdpa_device *vdpa = vd_get_vdpa(vdev);
const struct vdpa_config_ops *ops = vdpa->config;
ops->set_config(vdpa, offset, buf, len);
vdpa_set_config(vdpa, offset, buf, len);
}
static u32 virtio_vdpa_generation(struct virtio_device *vdev)