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virtio_ring: packed: extract the logic of attach vring

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Separate the logic of attach vring, the subsequent patch will call it
separately.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-22-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xuan Zhuo 2022-08-01 14:38:41 +08:00 committed by Michael S. Tsirkin
parent 1a107c87eb
commit 51d649f14a
1 changed files with 10 additions and 15 deletions
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25
drivers/virtio/virtio_ring.c
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@ -1948,6 +1948,15 @@ static void virtqueue_vring_init_packed(struct vring_virtqueue_packed *vring_pac
}
}
static void virtqueue_vring_attach_packed(struct vring_virtqueue *vq,
struct vring_virtqueue_packed *vring_packed)
{
vq->packed = *vring_packed;
/* Put everything in free lists. */
vq->free_head = 0;
}
static struct virtqueue *vring_create_virtqueue_packed(
unsigned int index,
unsigned int num,
@ -1993,28 +2002,14 @@ static struct virtqueue *vring_create_virtqueue_packed(
if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM))
vq->weak_barriers = false;
vq->packed.ring_dma_addr = vring_packed.ring_dma_addr;
vq->packed.driver_event_dma_addr = vring_packed.driver_event_dma_addr;
vq->packed.device_event_dma_addr = vring_packed.device_event_dma_addr;
vq->packed.ring_size_in_bytes = vring_packed.ring_size_in_bytes;
vq->packed.event_size_in_bytes = vring_packed.event_size_in_bytes;
vq->packed.vring = vring_packed.vring;
err = vring_alloc_state_extra_packed(&vring_packed);
if (err)
goto err_state_extra;
/* Put everything in free lists. */
vq->free_head = 0;
vq->packed.desc_state = vring_packed.desc_state;
vq->packed.desc_extra = vring_packed.desc_extra;
virtqueue_vring_init_packed(&vring_packed, !!callback);
virtqueue_init(vq, num);
virtqueue_vring_attach_packed(vq, &vring_packed);
spin_lock(&vdev->vqs_list_lock);
list_add_tail(&vq->vq.list, &vdev->vqs);