| Message ID | 20220720030436.79520-25-xuanzhuo@linux.alibaba.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | virtio pci support VIRTIO_F_RING_RESET | expand |
在 2022/7/20 11:04, Xuan Zhuo 写道: > This patch allows the new introduced > __virtqueue_break()/__virtqueue_unbreak() to break/unbreak the > virtqueue. > > Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> > --- > drivers/virtio/virtio_ring.c | 24 ++++++++++++++++++++++++ > include/linux/virtio.h | 3 +++ > 2 files changed, 27 insertions(+) > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > index cf4379175163..bf666dad9904 100644 > --- a/drivers/virtio/virtio_ring.c > +++ b/drivers/virtio/virtio_ring.c > @@ -2730,6 +2730,30 @@ unsigned int virtqueue_get_vring_size(struct virtqueue *_vq) > } > EXPORT_SYMBOL_GPL(virtqueue_get_vring_size); > > +/* > + * This function should only be called by the core, not directly by the driver. > + */ > +void __virtqueue_break(struct virtqueue *_vq) > +{ > + struct vring_virtqueue *vq = to_vvq(_vq); > + > + /* Pairs with READ_ONCE() in virtqueue_is_broken(). */ > + WRITE_ONCE(vq->broken, true); > +} > +EXPORT_SYMBOL_GPL(__virtqueue_break); > + > +/* > + * This function should only be called by the core, not directly by the driver. > + */ > +void __virtqueue_unbreak(struct virtqueue *_vq) > +{ > + struct vring_virtqueue *vq = to_vvq(_vq); > + > + /* Pairs with READ_ONCE() in virtqueue_is_broken(). */ > + WRITE_ONCE(vq->broken, false); > +} > +EXPORT_SYMBOL_GPL(__virtqueue_unbreak); > + > bool virtqueue_is_broken(struct virtqueue *_vq) > { > struct vring_virtqueue *vq = to_vvq(_vq); > diff --git a/include/linux/virtio.h b/include/linux/virtio.h > index 62e31bca5602..d45ee82a4470 100644 > --- a/include/linux/virtio.h > +++ b/include/linux/virtio.h > @@ -138,6 +138,9 @@ bool is_virtio_device(struct device *dev); > void virtio_break_device(struct virtio_device *dev); > void __virtio_unbreak_device(struct virtio_device *dev); > > +void __virtqueue_break(struct virtqueue *_vq); > +void __virtqueue_unbreak(struct virtqueue *_vq); > + > void virtio_config_changed(struct virtio_device *dev); > #ifdef CONFIG_PM_SLEEP > int virtio_device_freeze(struct virtio_device *dev);
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index cf4379175163..bf666dad9904 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2730,6 +2730,30 @@ unsigned int virtqueue_get_vring_size(struct virtqueue *_vq) } EXPORT_SYMBOL_GPL(virtqueue_get_vring_size); +/* + * This function should only be called by the core, not directly by the driver. + */ +void __virtqueue_break(struct virtqueue *_vq) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + + /* Pairs with READ_ONCE() in virtqueue_is_broken(). */ + WRITE_ONCE(vq->broken, true); +} +EXPORT_SYMBOL_GPL(__virtqueue_break); + +/* + * This function should only be called by the core, not directly by the driver. + */ +void __virtqueue_unbreak(struct virtqueue *_vq) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + + /* Pairs with READ_ONCE() in virtqueue_is_broken(). */ + WRITE_ONCE(vq->broken, false); +} +EXPORT_SYMBOL_GPL(__virtqueue_unbreak); + bool virtqueue_is_broken(struct virtqueue *_vq) { struct vring_virtqueue *vq = to_vvq(_vq); diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 62e31bca5602..d45ee82a4470 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -138,6 +138,9 @@ bool is_virtio_device(struct device *dev); void virtio_break_device(struct virtio_device *dev); void __virtio_unbreak_device(struct virtio_device *dev); +void __virtqueue_break(struct virtqueue *_vq); +void __virtqueue_unbreak(struct virtqueue *_vq); + void virtio_config_changed(struct virtio_device *dev); #ifdef CONFIG_PM_SLEEP int virtio_device_freeze(struct virtio_device *dev);
This patch allows the new introduced __virtqueue_break()/__virtqueue_unbreak() to break/unbreak the virtqueue. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/virtio/virtio_ring.c | 24 ++++++++++++++++++++++++ include/linux/virtio.h | 3 +++ 2 files changed, 27 insertions(+)