linux-kernel - [PATCH v6 08/12] virtio_ring: switch to virtio_legacy

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Date:   Mon, 6 Apr 2020 18:26:44 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Jason Wang <jasowang@...hat.com>,
        virtualization@...ts.linux-foundation.org
Subject: [PATCH v6 08/12] virtio_ring: switch to virtio_legacy_init/size

These are used for legacy ring format, switch to APIs
that make this explicit.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/virtio/virtio_ring.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 58b96baa8d48..2a2b12449bac 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -867,8 +867,10 @@ static struct virtqueue *vring_create_virtqueue_split(
 	}
 
 	/* TODO: allocate each queue chunk individually */
-	for (; num && vring_size(num, vring_align) > PAGE_SIZE; num /= 2) {
-		queue = vring_alloc_queue(vdev, vring_size(num, vring_align),
+	for (; num && vring_legacy_size(num, vring_align) > PAGE_SIZE;
+	     num /= 2) {
+		queue = vring_alloc_queue(vdev,
+					  vring_legacy_size(num, vring_align),
 					  &dma_addr,
 					  GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO);
 		if (queue)
@@ -882,14 +884,15 @@ static struct virtqueue *vring_create_virtqueue_split(
 
 	if (!queue) {
 		/* Try to get a single page. You are my only hope! */
-		queue = vring_alloc_queue(vdev, vring_size(num, vring_align),
+		queue = vring_alloc_queue(vdev,
+					  vring_legacy_size(num, vring_align),
 					  &dma_addr, GFP_KERNEL|__GFP_ZERO);
 	}
 	if (!queue)
 		return NULL;
 
-	queue_size_in_bytes = vring_size(num, vring_align);
-	vring_init(&vring, num, queue, vring_align);
+	queue_size_in_bytes = vring_legacy_size(num, vring_align);
+	vring_legacy_init(&vring, num, queue, vring_align);
 
 	vq = __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
 				   notify, callback, name);
@@ -2169,7 +2172,7 @@ struct virtqueue *vring_new_virtqueue(unsigned int index,
 	if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED))
 		return NULL;
 
-	vring_init(&vring, num, pages, vring_align);
+	vring_legacy_init(&vring, num, pages, vring_align);
 	return __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
 				     notify, callback, name);
 }
-- 
MST