RE: [PATCH 1/6] virtio: wrap find_vqs

["Gonglei (Arei)" <arei.gonglei@huawei.com>]

> -----Original Message-----
> From: Michael S. Tsirkin [mailto:mst@redhat.com]
> Sent: Thursday, March 30, 2017 4:49 AM
> Subject: [PATCH 1/6] virtio: wrap find_vqs
> 
> We are going to add more parameters to find_vqs, let's wrap the call so
> we don't need to tweak all drivers every time.
> 
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>  drivers/block/virtio_blk.c                 | 3 +--
>  drivers/char/virtio_console.c              | 6 +++---
>  drivers/crypto/virtio/virtio_crypto_core.c | 3 +--
>  drivers/gpu/drm/virtio/virtgpu_kms.c       | 3 +--
>  drivers/net/caif/caif_virtio.c             | 3 +--
>  drivers/net/virtio_net.c                   | 3 +--
>  drivers/rpmsg/virtio_rpmsg_bus.c           | 2 +-
>  drivers/scsi/virtio_scsi.c                 | 3 +--
>  drivers/virtio/virtio_balloon.c            | 3 +--
>  drivers/virtio/virtio_input.c              | 3 +--
>  include/linux/virtio_config.h              | 9 +++++++++
>  net/vmw_vsock/virtio_transport.c           | 6 +++---
>  12 files changed, 24 insertions(+), 23 deletions(-)
> 

Acked-by: Gonglei <arei.gonglei@huawei.com>


> diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
> index 1d4c9f8..c08c30c 100644
> --- a/drivers/block/virtio_blk.c
> +++ b/drivers/block/virtio_blk.c
> @@ -455,8 +455,7 @@ static int init_vq(struct virtio_blk *vblk)
>  	}
> 
>  	/* Discover virtqueues and write information to configuration.  */
> -	err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names,
> -			&desc);
> +	err = virtio_find_vqs(vdev, num_vqs, vqs, callbacks, names, &desc);
>  	if (err)
>  		goto out;
> 
> diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
> index e9b7e0b..5da4c8e 100644
> --- a/drivers/char/virtio_console.c
> +++ b/drivers/char/virtio_console.c
> @@ -1945,9 +1945,9 @@ static int init_vqs(struct ports_device *portdev)
>  		}
>  	}
>  	/* Find the queues. */
> -	err = portdev->vdev->config->find_vqs(portdev->vdev, nr_queues, vqs,
> -					      io_callbacks,
> -					      (const char **)io_names, NULL);
> +	err = virtio_find_vqs(portdev->vdev, nr_queues, vqs,
> +			      io_callbacks,
> +			      (const char **)io_names, NULL);
>  	if (err)
>  		goto free;
> 
> diff --git a/drivers/crypto/virtio/virtio_crypto_core.c
> b/drivers/crypto/virtio/virtio_crypto_core.c
> index 21472e4..a111cd72 100644
> --- a/drivers/crypto/virtio/virtio_crypto_core.c
> +++ b/drivers/crypto/virtio/virtio_crypto_core.c
> @@ -119,8 +119,7 @@ static int virtcrypto_find_vqs(struct virtio_crypto *vi)
>  		names[i] = vi->data_vq[i].name;
>  	}
> 
> -	ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks,
> -					 names, NULL);
> +	ret = virtio_find_vqs(vi->vdev, total_vqs, vqs, callbacks, names, NULL);
>  	if (ret)
>  		goto err_find;
> 
> diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c
> b/drivers/gpu/drm/virtio/virtgpu_kms.c
> index 4918668..1e1c90b 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_kms.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
> @@ -175,8 +175,7 @@ int virtio_gpu_driver_load(struct drm_device *dev,
> unsigned long flags)
>  	DRM_INFO("virgl 3d acceleration not supported by guest\n");
>  #endif
> 
> -	ret = vgdev->vdev->config->find_vqs(vgdev->vdev, 2, vqs,
> -					    callbacks, names, NULL);
> +	ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL);
>  	if (ret) {
>  		DRM_ERROR("failed to find virt queues\n");
>  		goto err_vqs;
> diff --git a/drivers/net/caif/caif_virtio.c b/drivers/net/caif/caif_virtio.c
> index bc0eb47..6122768 100644
> --- a/drivers/net/caif/caif_virtio.c
> +++ b/drivers/net/caif/caif_virtio.c
> @@ -679,8 +679,7 @@ static int cfv_probe(struct virtio_device *vdev)
>  		goto err;
> 
>  	/* Get the TX virtio ring. This is a "guest side vring". */
> -	err = vdev->config->find_vqs(vdev, 1, &cfv->vq_tx, &vq_cbs, &names,
> -			NULL);
> +	err = virtio_find_vqs(vdev, 1, &cfv->vq_tx, &vq_cbs, &names, NULL);
>  	if (err)
>  		goto err;
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index ea9890d..6802169 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -2079,8 +2079,7 @@ static int virtnet_find_vqs(struct virtnet_info *vi)
>  		names[txq2vq(i)] = vi->sq[i].name;
>  	}
> 
> -	ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks,
> -					 names, NULL);
> +	ret = virtio_find_vqs(vi->vdev, total_vqs, vqs, callbacks, names, NULL);
>  	if (ret)
>  		goto err_find;
> 
> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c
> b/drivers/rpmsg/virtio_rpmsg_bus.c
> index 5e66e08..f7cade0 100644
> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
> @@ -869,7 +869,7 @@ static int rpmsg_probe(struct virtio_device *vdev)
>  	init_waitqueue_head(&vrp->sendq);
> 
>  	/* We expect two virtqueues, rx and tx (and in this order) */
> -	err = vdev->config->find_vqs(vdev, 2, vqs, vq_cbs, names, NULL);
> +	err = virtio_find_vqs(vdev, 2, vqs, vq_cbs, names, NULL);
>  	if (err)
>  		goto free_vrp;
> 
> diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
> index 939c47d..e9222dc 100644
> --- a/drivers/scsi/virtio_scsi.c
> +++ b/drivers/scsi/virtio_scsi.c
> @@ -870,8 +870,7 @@ static int virtscsi_init(struct virtio_device *vdev,
>  	}
> 
>  	/* Discover virtqueues and write information to configuration.  */
> -	err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names,
> -			&desc);
> +	err = virtio_find_vqs(vdev, num_vqs, vqs, callbacks, names, &desc);
>  	if (err)
>  		goto out;
> 
> diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
> index 34adf9b..408c174 100644
> --- a/drivers/virtio/virtio_balloon.c
> +++ b/drivers/virtio/virtio_balloon.c
> @@ -418,8 +418,7 @@ static int init_vqs(struct virtio_balloon *vb)
>  	 * optionally stat.
>  	 */
>  	nvqs = virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_STATS_VQ) ? 3 :
> 2;
> -	err = vb->vdev->config->find_vqs(vb->vdev, nvqs, vqs, callbacks, names,
> -			NULL);
> +	err = virtio_find_vqs(vb->vdev, nvqs, vqs, callbacks, names, NULL);
>  	if (err)
>  		return err;
> 
> diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c
> index 79f1293..3a0468f 100644
> --- a/drivers/virtio/virtio_input.c
> +++ b/drivers/virtio/virtio_input.c
> @@ -173,8 +173,7 @@ static int virtinput_init_vqs(struct virtio_input *vi)
>  	static const char * const names[] = { "events", "status" };
>  	int err;
> 
> -	err = vi->vdev->config->find_vqs(vi->vdev, 2, vqs, cbs, names,
> -			NULL);
> +	err = virtio_find_vqs(vi->vdev, 2, vqs, cbs, names, NULL);
>  	if (err)
>  		return err;
>  	vi->evt = vqs[0];
> diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> index 8355bab..47f3d80 100644
> --- a/include/linux/virtio_config.h
> +++ b/include/linux/virtio_config.h
> @@ -179,6 +179,15 @@ struct virtqueue *virtio_find_single_vq(struct
> virtio_device *vdev,
>  	return vq;
>  }
> 
> +static inline
> +int virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> +			struct virtqueue *vqs[], vq_callback_t *callbacks[],
> +			const char * const names[],
> +			struct irq_affinity *desc)
> +{
> +	return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, desc);
> +}
> +
>  /**
>   * virtio_device_ready - enable vq use in probe function
>   * @vdev: the device
> diff --git a/net/vmw_vsock/virtio_transport.c
> b/net/vmw_vsock/virtio_transport.c
> index 68675a1..97e26e2 100644
> --- a/net/vmw_vsock/virtio_transport.c
> +++ b/net/vmw_vsock/virtio_transport.c
> @@ -573,9 +573,9 @@ static int virtio_vsock_probe(struct virtio_device
> *vdev)
> 
>  	vsock->vdev = vdev;
> 
> -	ret = vsock->vdev->config->find_vqs(vsock->vdev, VSOCK_VQ_MAX,
> -					    vsock->vqs, callbacks, names,
> -					    NULL);
> +	ret = virtio_find_vqs(vsock->vdev, VSOCK_VQ_MAX,
> +			      vsock->vqs, callbacks, names,
> +			      NULL);
>  	if (ret < 0)
>  		goto out;
> 
> --
> MST