[PATCH v12 26/40] virtio_ring: struct virtqueue introduce reset

Xuan Zhuo
2022-07-20T03:08:22Z

Introduce a new member reset to the structure virtqueue to determine
whether the current vq is in the reset state. Subsequent patches will
use it.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
drivers/virtio/virtio_ring.c | 2 ++
include/linux/virtio.h | 2 ++
2 files changed, 4 insertions(+)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index bf666dad9904..8278b917ad64 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -2011,6 +2011,7 @@ static struct virtqueue *vring_create_virtqueue_packed(
vq->vq.vdev = vdev;
vq->vq.name = name;
vq->vq.index = index;
+ vq->vq.reset = false;
vq->we_own_ring = true;
vq->notify = notify;
vq->weak_barriers = weak_barriers;
@@ -2490,6 +2491,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index,
vq->vq.vdev = vdev;
vq->vq.name = name;
vq->vq.index = index;
+ vq->vq.reset = false;
vq->we_own_ring = false;
vq->notify = notify;
vq->weak_barriers = weak_barriers;
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index d45ee82a4470..a3f73bb6733e 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -20,6 +20,7 @@
* @index: the zero-based ordinal number for this queue.
* @num_free: number of elements we expect to be able to fit.
* @num_max: the maximum number of elements supported by the device.
+ * @reset: vq is in reset state or not.
*
* A note on @num_free: with indirect buffers, each buffer needs one
* element in the queue, otherwise a buffer will need one element per
@@ -34,6 +35,7 @@ struct virtqueue {
unsigned int num_free;
unsigned int num_max;
void *priv;
+ bool reset;
};

int virtqueue_add_outbuf(struct virtqueue *vq,
--
2.31.0