[PATCH v12 18/40] virtio_ring: packed: extract the logic of attach vring

Xuan Zhuo
Wed, 20 Jul 2022 03:04:14 -0000

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

Signed-off-by: Xuan Zhuo <xuanzhuo at linux.alibaba.com>
---
 drivers/virtio/virtio_ring.c | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 1f8d6417b46a..19ed20d7d433 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1932,6 +1932,22 @@ static int vring_alloc_state_extra_packed(struct
vring_virtqueue_packed *vring_p
 	return -ENOMEM;
 }

+static void virtqueue_vring_attach_packed(struct vring_virtqueue *vq,
+					  struct vring_virtqueue_packed *vring_packed)
+{
+	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;
+
+	vq->packed.desc_state = vring_packed->desc_state;
+	vq->packed.desc_extra = vring_packed->desc_extra;
+}
+
 static struct virtqueue *vring_create_virtqueue_packed(
 	unsigned int index,
 	unsigned int num,
@@ -1972,15 +1988,6 @@ static struct virtqueue *vring_create_virtqueue_packed(
 	vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC)
&&
 		!context;

-	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;
-
 	vq->packed.next_avail_idx = 0;
 	vq->packed.avail_wrap_counter = 1;
 	vq->packed.event_flags_shadow = 0;
@@ -1990,10 +1997,8 @@ static struct virtqueue *vring_create_virtqueue_packed(
 	if (err)
 		goto err_state_extra;

-	vq->packed.desc_state = vring.desc_state;
-	vq->packed.desc_extra = vring.desc_extra;
-
 	virtqueue_init(vq, num);
+	virtqueue_vring_attach_packed(vq, &vring_packed);

 	/* No callback?  Tell other side not to bother us. */
 	if (!callback) {
--
2.31.0