netdev - Re: [PATCH v9 27/32] virtio: add helper virtio_find_vqs_ctx

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Date:   Tue, 12 Apr 2022 15:15:44 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        virtualization@...ts.linux-foundation.org
Cc:     Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        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>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...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>,
        Johannes Berg <johannes.berg@...el.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
Subject: Re: [PATCH v9 27/32] virtio: add helper virtio_find_vqs_ctx_size()


在 2022/4/6 上午11:43, Xuan Zhuo 写道:
> Introduce helper virtio_find_vqs_ctx_size() to call find_vqs and specify
> the maximum size of each vq ring.
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>


Acked-by: Jason Wang <jasowang@...hat.com>


> ---
>   include/linux/virtio_config.h | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
>
> diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> index 0f7def7ddfd2..22e29c926946 100644
> --- a/include/linux/virtio_config.h
> +++ b/include/linux/virtio_config.h
> @@ -235,6 +235,18 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs,
>   				      ctx, desc);
>   }
>   
> +static inline
> +int virtio_find_vqs_ctx_size(struct virtio_device *vdev, u32 nvqs,
> +				 struct virtqueue *vqs[],
> +				 vq_callback_t *callbacks[],
> +				 const char * const names[],
> +				 u32 sizes[],
> +				 const bool *ctx, struct irq_affinity *desc)
> +{
> +	return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, sizes,
> +				      ctx, desc);
> +}
> +
>   /**
>    * virtio_device_ready - enable vq use in probe function
>    * @vdev: the device