| Message ID | 20220308123518.33800-15-xuanzhuo@linux.alibaba.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | virtio pci support VIRTIO_F_RING_RESET | expand |
在 2022/3/8 下午8:35, Xuan Zhuo 写道: > Add helper for virtio queue reset. > > * virtio_reset_vq(): reset a queue individually > * virtio_enable_resetq(): enable a reset queue > > Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> > --- > include/linux/virtio_config.h | 40 +++++++++++++++++++++++++++++++++++ > 1 file changed, 40 insertions(+) > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > index d51906b1389f..0b81fbe17c85 100644 > --- a/include/linux/virtio_config.h > +++ b/include/linux/virtio_config.h > @@ -230,6 +230,46 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs, > desc); > } > > +/** > + * virtio_reset_vq - reset a queue individually > + * @vq: the virtqueue > + * > + * returns 0 on success or error status > + * > + * The api process of reset under normal circumstances: > + * 1. virtio_reset_vq() - notify the device to reset the queue > + * 2. virtqueue_detach_unused_buf() - recycle the buffer submitted > + * 3. virtqueue_reset_vring() - reset the vring (may re-alloc) > + * 4. virtio_enable_resetq() - mmap vring to device, and enable the queue > + * > + * Caller should guarantee that the vring is not accessed by any functions > + * of virtqueue. > + */ > +static inline > +int virtio_reset_vq(struct virtqueue *vq) > +{ It looks to me the prefix "virtio" is used for the device specific operations. I wonder if it's better to rename this as virtqueue_reste() and move it to virtio_ring.c? Thanks > + if (!vq->vdev->config->reset_vq) > + return -ENOENT; > + > + return vq->vdev->config->reset_vq(vq); > +} > + > +/** > + * virtio_enable_resetq - enable a reset queue > + * @vq: the virtqueue > + * > + * returns 0 on success or error status > + * > + */ > +static inline > +int virtio_enable_resetq(struct virtqueue *vq) > +{ > + if (!vq->vdev->config->enable_reset_vq) > + return -ENOENT; > + > + return vq->vdev->config->enable_reset_vq(vq); > +} > + > /** > * virtio_device_ready - enable vq use in probe function > * @vdev: the device
On Wed, 9 Mar 2022 16:48:28 +0800, Jason Wang <jasowang@redhat.com> wrote: > > 在 2022/3/8 下午8:35, Xuan Zhuo 写道: > > Add helper for virtio queue reset. > > > > * virtio_reset_vq(): reset a queue individually > > * virtio_enable_resetq(): enable a reset queue > > > > Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> > > --- > > include/linux/virtio_config.h | 40 +++++++++++++++++++++++++++++++++++ > > 1 file changed, 40 insertions(+) > > > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > > index d51906b1389f..0b81fbe17c85 100644 > > --- a/include/linux/virtio_config.h > > +++ b/include/linux/virtio_config.h > > @@ -230,6 +230,46 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs, > > desc); > > } > > > > +/** > > + * virtio_reset_vq - reset a queue individually > > + * @vq: the virtqueue > > + * > > + * returns 0 on success or error status > > + * > > + * The api process of reset under normal circumstances: > > + * 1. virtio_reset_vq() - notify the device to reset the queue > > + * 2. virtqueue_detach_unused_buf() - recycle the buffer submitted > > + * 3. virtqueue_reset_vring() - reset the vring (may re-alloc) > > + * 4. virtio_enable_resetq() - mmap vring to device, and enable the queue > > + * > > + * Caller should guarantee that the vring is not accessed by any functions > > + * of virtqueue. > > + */ > > +static inline > > +int virtio_reset_vq(struct virtqueue *vq) > > +{ > > > It looks to me the prefix "virtio" is used for the device specific > operations. > > I wonder if it's better to rename this as virtqueue_reste() and move it > to virtio_ring.c? Call vq->vdev->config->reset_vq in virtio_ring.c? If it fits, I think it's fine. Thanks. > > Thanks > > > > + if (!vq->vdev->config->reset_vq) > > + return -ENOENT; > > + > > + return vq->vdev->config->reset_vq(vq); > > +} > > + > > +/** > > + * virtio_enable_resetq - enable a reset queue > > + * @vq: the virtqueue > > + * > > + * returns 0 on success or error status > > + * > > + */ > > +static inline > > +int virtio_enable_resetq(struct virtqueue *vq) > > +{ > > + if (!vq->vdev->config->enable_reset_vq) > > + return -ENOENT; > > + > > + return vq->vdev->config->enable_reset_vq(vq); > > +} > > + > > /** > > * virtio_device_ready - enable vq use in probe function > > * @vdev: the device >
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index d51906b1389f..0b81fbe17c85 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -230,6 +230,46 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs, desc); } +/** + * virtio_reset_vq - reset a queue individually + * @vq: the virtqueue + * + * returns 0 on success or error status + * + * The api process of reset under normal circumstances: + * 1. virtio_reset_vq() - notify the device to reset the queue + * 2. virtqueue_detach_unused_buf() - recycle the buffer submitted + * 3. virtqueue_reset_vring() - reset the vring (may re-alloc) + * 4. virtio_enable_resetq() - mmap vring to device, and enable the queue + * + * Caller should guarantee that the vring is not accessed by any functions + * of virtqueue. + */ +static inline +int virtio_reset_vq(struct virtqueue *vq) +{ + if (!vq->vdev->config->reset_vq) + return -ENOENT; + + return vq->vdev->config->reset_vq(vq); +} + +/** + * virtio_enable_resetq - enable a reset queue + * @vq: the virtqueue + * + * returns 0 on success or error status + * + */ +static inline +int virtio_enable_resetq(struct virtqueue *vq) +{ + if (!vq->vdev->config->enable_reset_vq) + return -ENOENT; + + return vq->vdev->config->enable_reset_vq(vq); +} + /** * virtio_device_ready - enable vq use in probe function * @vdev: the device
Add helper for virtio queue reset. * virtio_reset_vq(): reset a queue individually * virtio_enable_resetq(): enable a reset queue Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- include/linux/virtio_config.h | 40 +++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+)