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Date: Mon, 15 Aug 2022 17:56:31 -0400
From: "Michael S. Tsirkin" <mst@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
Jason Wang <jasowang@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
Linus Torvalds <torvalds@...ux-foundation.org>,
Jens Axboe <axboe@...nel.dk>,
James Bottomley <James.Bottomley@...senpartnership.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Guenter Roeck <linux@...ck-us.net>,
Greg KH <gregkh@...uxfoundation.org>,
Ricardo Cañuelo
<ricardo.canuelo@...labora.com>, Cornelia Huck <cohuck@...hat.com>
Subject: Re: [PATCH v2 1/1] virtio: kerneldocs fixes and enhancements
On Mon, Aug 15, 2022 at 05:53:24PM -0400, Michael S. Tsirkin wrote:
> From: Ricardo Cañuelo <ricardo.canuelo@...labora.com>
>
> Fix variable names in some kerneldocs, naming in others.
> Add kerneldocs for struct vring_desc and vring_interrupt.
>
> Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@...labora.com>
> Message-Id: <20220810094004.1250-2-ricardo.canuelo@...labora.com>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> Reviewed-by: Cornelia Huck <cohuck@...hat.com>
Ouch this got here by mistake. Just ignore this patch pls -
it's already in my tree but does not belong in the patchset.
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index d66c8e6d0ef3..4620e9d79dde 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -2426,6 +2426,14 @@ static inline bool more_used(const struct vring_virtqueue *vq)
> return vq->packed_ring ? more_used_packed(vq) : more_used_split(vq);
> }
>
> +/**
> + * vring_interrupt - notify a virtqueue on an interrupt
> + * @irq: the IRQ number (ignored)
> + * @_vq: the struct virtqueue to notify
> + *
> + * Calls the callback function of @_vq to process the virtqueue
> + * notification.
> + */
> irqreturn_t vring_interrupt(int irq, void *_vq)
> {
> struct vring_virtqueue *vq = to_vvq(_vq);
> diff --git a/include/linux/virtio.h b/include/linux/virtio.h
> index a3f73bb6733e..dcab9c7e8784 100644
> --- a/include/linux/virtio.h
> +++ b/include/linux/virtio.h
> @@ -11,7 +11,7 @@
> #include <linux/gfp.h>
>
> /**
> - * virtqueue - a queue to register buffers for sending or receiving.
> + * struct virtqueue - a queue to register buffers for sending or receiving.
> * @list: the chain of virtqueues for this device
> * @callback: the function to call when buffers are consumed (can be NULL).
> * @name: the name of this virtqueue (mainly for debugging)
> @@ -97,7 +97,7 @@ int virtqueue_resize(struct virtqueue *vq, u32 num,
> void (*recycle)(struct virtqueue *vq, void *buf));
>
> /**
> - * virtio_device - representation of a device using virtio
> + * struct virtio_device - representation of a device using virtio
> * @index: unique position on the virtio bus
> * @failed: saved value for VIRTIO_CONFIG_S_FAILED bit (for restore)
> * @config_enabled: configuration change reporting enabled
> @@ -156,7 +156,7 @@ size_t virtio_max_dma_size(struct virtio_device *vdev);
> list_for_each_entry(vq, &vdev->vqs, list)
>
> /**
> - * virtio_driver - operations for a virtio I/O driver
> + * struct virtio_driver - operations for a virtio I/O driver
> * @driver: underlying device driver (populate name and owner).
> * @id_table: the ids serviced by this driver.
> * @feature_table: an array of feature numbers supported by this driver.
> diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> index 36ec7be1f480..4b517649cfe8 100644
> --- a/include/linux/virtio_config.h
> +++ b/include/linux/virtio_config.h
> @@ -239,7 +239,7 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs,
>
> /**
> * virtio_synchronize_cbs - synchronize with virtqueue callbacks
> - * @vdev: the device
> + * @dev: the virtio device
> */
> static inline
> void virtio_synchronize_cbs(struct virtio_device *dev)
> @@ -258,7 +258,7 @@ void virtio_synchronize_cbs(struct virtio_device *dev)
>
> /**
> * virtio_device_ready - enable vq use in probe function
> - * @vdev: the device
> + * @dev: the virtio device
> *
> * Driver must call this to use vqs in the probe function.
> *
> @@ -306,7 +306,7 @@ const char *virtio_bus_name(struct virtio_device *vdev)
> /**
> * virtqueue_set_affinity - setting affinity for a virtqueue
> * @vq: the virtqueue
> - * @cpu: the cpu no.
> + * @cpu_mask: the cpu mask
> *
> * Pay attention the function are best-effort: the affinity hint may not be set
> * due to config support, irq type and sharing.
> diff --git a/include/uapi/linux/virtio_ring.h b/include/uapi/linux/virtio_ring.h
> index 476d3e5c0fe7..f8c20d3de8da 100644
> --- a/include/uapi/linux/virtio_ring.h
> +++ b/include/uapi/linux/virtio_ring.h
> @@ -93,15 +93,21 @@
> #define VRING_USED_ALIGN_SIZE 4
> #define VRING_DESC_ALIGN_SIZE 16
>
> -/* Virtio ring descriptors: 16 bytes. These can chain together via "next". */
> +/**
> + * struct vring_desc - Virtio ring descriptors,
> + * 16 bytes long. These can chain together via @next.
> + *
> + * @addr: buffer address (guest-physical)
> + * @len: buffer length
> + * @flags: descriptor flags
> + * @next: index of the next descriptor in the chain,
> + * if the VRING_DESC_F_NEXT flag is set. We chain unused
> + * descriptors via this, too.
> + */
> struct vring_desc {
> - /* Address (guest-physical). */
> __virtio64 addr;
> - /* Length. */
> __virtio32 len;
> - /* The flags as indicated above. */
> __virtio16 flags;
> - /* We chain unused descriptors via this, too */
> __virtio16 next;
> };
>
> --
> MST
>
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