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Date: Wed, 27 Jul 2022 11:05:16 +0800
From: Jason Wang <jasowang@...hat.com>
To: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
virtualization@...ts.linux-foundation.org
Cc: Richard Weinberger <richard@....at>,
Anton Ivanov <anton.ivanov@...bridgegreys.com>,
Johannes Berg <johannes@...solutions.net>,
"Michael S. Tsirkin" <mst@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Hans de Goede <hdegoede@...hat.com>,
Mark Gross <markgross@...nel.org>,
Vadim Pasternak <vadimp@...dia.com>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Cornelia Huck <cohuck@...hat.com>,
Halil Pasic <pasic@...ux.ibm.com>,
Eric Farman <farman@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Vasily Gorbik <gor@...ux.ibm.com>,
Alexander Gordeev <agordeev@...ux.ibm.com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Sven Schnelle <svens@...ux.ibm.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Vincent Whitchurch <vincent.whitchurch@...s.com>,
linux-um@...ts.infradead.org, netdev@...r.kernel.org,
platform-driver-x86@...r.kernel.org,
linux-remoteproc@...r.kernel.org, linux-s390@...r.kernel.org,
kvm@...r.kernel.org, bpf@...r.kernel.org,
kangjie.xu@...ux.alibaba.com
Subject: Re: [PATCH v13 08/42] virtio_ring: split: __vring_new_virtqueue()
accept struct vring_virtqueue_split
在 2022/7/26 15:21, Xuan Zhuo 写道:
> __vring_new_virtqueue() instead accepts struct vring_virtqueue_split.
>
> The purpose of this is to pass more information into
> __vring_new_virtqueue() to make the code simpler and the structure
> cleaner.
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Acked-by: Jason Wang <jasowang@...hat.com>
> ---
> drivers/virtio/virtio_ring.c | 29 +++++++++++++++--------------
> 1 file changed, 15 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index 4e54ed7ee7fb..4d65c437d968 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -205,7 +205,7 @@ struct vring_virtqueue {
> };
>
> static struct virtqueue *__vring_new_virtqueue(unsigned int index,
> - struct vring vring,
> + struct vring_virtqueue_split *vring_split,
> struct virtio_device *vdev,
> bool weak_barriers,
> bool context,
> @@ -959,6 +959,7 @@ static struct virtqueue *vring_create_virtqueue_split(
> void (*callback)(struct virtqueue *),
> const char *name)
> {
> + struct vring_virtqueue_split vring_split = {};
> struct virtqueue *vq;
> void *queue = NULL;
> dma_addr_t dma_addr;
> @@ -994,10 +995,10 @@ static struct virtqueue *vring_create_virtqueue_split(
> return NULL;
>
> queue_size_in_bytes = vring_size(num, vring_align);
> - vring_init(&vring, num, queue, vring_align);
> + vring_init(&vring_split.vring, num, queue, vring_align);
>
> - vq = __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
> - notify, callback, name);
> + vq = __vring_new_virtqueue(index, &vring_split, vdev, weak_barriers,
> + context, notify, callback, name);
> if (!vq) {
> vring_free_queue(vdev, queue_size_in_bytes, queue,
> dma_addr);
> @@ -2206,7 +2207,7 @@ EXPORT_SYMBOL_GPL(vring_interrupt);
>
> /* Only available for split ring */
> static struct virtqueue *__vring_new_virtqueue(unsigned int index,
> - struct vring vring,
> + struct vring_virtqueue_split *vring_split,
> struct virtio_device *vdev,
> bool weak_barriers,
> bool context,
> @@ -2243,7 +2244,7 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
> vq->split.queue_dma_addr = 0;
> vq->split.queue_size_in_bytes = 0;
>
> - vq->split.vring = vring;
> + vq->split.vring = vring_split->vring;
> vq->split.avail_flags_shadow = 0;
> vq->split.avail_idx_shadow = 0;
>
> @@ -2255,19 +2256,19 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
> vq->split.avail_flags_shadow);
> }
>
> - vq->split.desc_state = kmalloc_array(vring.num,
> + vq->split.desc_state = kmalloc_array(vring_split->vring.num,
> sizeof(struct vring_desc_state_split), GFP_KERNEL);
> if (!vq->split.desc_state)
> goto err_state;
>
> - vq->split.desc_extra = vring_alloc_desc_extra(vring.num);
> + vq->split.desc_extra = vring_alloc_desc_extra(vring_split->vring.num);
> if (!vq->split.desc_extra)
> goto err_extra;
>
> - memset(vq->split.desc_state, 0, vring.num *
> + memset(vq->split.desc_state, 0, vring_split->vring.num *
> sizeof(struct vring_desc_state_split));
>
> - virtqueue_init(vq, vq->split.vring.num);
> + virtqueue_init(vq, vring_split->vring.num);
>
> spin_lock(&vdev->vqs_list_lock);
> list_add_tail(&vq->vq.list, &vdev->vqs);
> @@ -2317,14 +2318,14 @@ struct virtqueue *vring_new_virtqueue(unsigned int index,
> void (*callback)(struct virtqueue *vq),
> const char *name)
> {
> - struct vring vring;
> + struct vring_virtqueue_split vring_split = {};
>
> if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED))
> return NULL;
>
> - vring_init(&vring, num, pages, vring_align);
> - return __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
> - notify, callback, name);
> + vring_init(&vring_split.vring, num, pages, vring_align);
> + return __vring_new_virtqueue(index, &vring_split, vdev, weak_barriers,
> + context, notify, callback, name);
> }
> EXPORT_SYMBOL_GPL(vring_new_virtqueue);
>
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