| Message ID | 20220406034346.74409-9-xuanzhuo@linux.alibaba.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | virtio pci support VIRTIO_F_RING_RESET (refactor vring) | expand |
在 2022/4/6 上午11:43, Xuan Zhuo 写道: > Separate the logic of attach vring, subsequent patches will call it > separately. > > Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> > --- > drivers/virtio/virtio_ring.c | 20 ++++++++++++++------ > 1 file changed, 14 insertions(+), 6 deletions(-) > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > index 6de67439cb57..083f2992ba0d 100644 > --- a/drivers/virtio/virtio_ring.c > +++ b/drivers/virtio/virtio_ring.c > @@ -916,6 +916,19 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) > return NULL; > } > > +static void vring_virtqueue_attach_split(struct vring_virtqueue *vq, > + struct vring vring, > + struct vring_desc_state_split *desc_state, > + struct vring_desc_extra *desc_extra) > +{ > + vq->split.vring = vring; > + vq->split.queue_dma_addr = 0; > + vq->split.queue_size_in_bytes = 0; Any reason to add the above two assignment in attach? It seems belong to free or reset. Thanks > + > + vq->split.desc_state = desc_state; > + vq->split.desc_extra = desc_extra; > +} > + > static int vring_alloc_state_extra_split(u32 num, > struct vring_desc_state_split **desc_state, > struct vring_desc_extra **desc_extra) > @@ -2262,10 +2275,6 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, > if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM)) > vq->weak_barriers = false; > > - vq->split.queue_dma_addr = 0; > - vq->split.queue_size_in_bytes = 0; > - > - vq->split.vring = vring; > vq->split.avail_flags_shadow = 0; > vq->split.avail_idx_shadow = 0; > > @@ -2283,8 +2292,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, > return NULL; > } > > - vq->split.desc_state = state; > - vq->split.desc_extra = extra; > + vring_virtqueue_attach_split(vq, vring, state, extra); > > /* Put everything in free lists. */ > vq->free_head = 0;
On Tue, 12 Apr 2022 11:31:08 +0800, Jason Wang <jasowang@redhat.com> wrote: > > 在 2022/4/6 上午11:43, Xuan Zhuo 写道: > > Separate the logic of attach vring, subsequent patches will call it > > separately. > > > > Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> > > --- > > drivers/virtio/virtio_ring.c | 20 ++++++++++++++------ > > 1 file changed, 14 insertions(+), 6 deletions(-) > > > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > > index 6de67439cb57..083f2992ba0d 100644 > > --- a/drivers/virtio/virtio_ring.c > > +++ b/drivers/virtio/virtio_ring.c > > @@ -916,6 +916,19 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) > > return NULL; > > } > > > > +static void vring_virtqueue_attach_split(struct vring_virtqueue *vq, > > + struct vring vring, > > + struct vring_desc_state_split *desc_state, > > + struct vring_desc_extra *desc_extra) > > +{ > > + vq->split.vring = vring; > > + vq->split.queue_dma_addr = 0; > > + vq->split.queue_size_in_bytes = 0; > > > Any reason to add the above two assignment in attach? It seems belong to > free or reset. As discussed in patch 11, since there is no dma_addr in __vring_new_virtqueue(), the corresponding vq->split.queue_dma_addr cannot be set, so the purpose here is just to initialize it. In the next version, struct vring_virtqueue_split will be passed to vring_virtqueue_attach_split() to make the logic here look more reasonable. Thanks. > > Thanks > > > > + > > + vq->split.desc_state = desc_state; > > + vq->split.desc_extra = desc_extra; > > +} > > + > > static int vring_alloc_state_extra_split(u32 num, > > struct vring_desc_state_split **desc_state, > > struct vring_desc_extra **desc_extra) > > @@ -2262,10 +2275,6 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, > > if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM)) > > vq->weak_barriers = false; > > > > - vq->split.queue_dma_addr = 0; > > - vq->split.queue_size_in_bytes = 0; > > - > > - vq->split.vring = vring; > > vq->split.avail_flags_shadow = 0; > > vq->split.avail_idx_shadow = 0; > > > > @@ -2283,8 +2292,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, > > return NULL; > > } > > > > - vq->split.desc_state = state; > > - vq->split.desc_extra = extra; > > + vring_virtqueue_attach_split(vq, vring, state, extra); > > > > /* Put everything in free lists. */ > > vq->free_head = 0; >
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6de67439cb57..083f2992ba0d 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -916,6 +916,19 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) return NULL; } +static void vring_virtqueue_attach_split(struct vring_virtqueue *vq, + struct vring vring, + struct vring_desc_state_split *desc_state, + struct vring_desc_extra *desc_extra) +{ + vq->split.vring = vring; + vq->split.queue_dma_addr = 0; + vq->split.queue_size_in_bytes = 0; + + vq->split.desc_state = desc_state; + vq->split.desc_extra = desc_extra; +} + static int vring_alloc_state_extra_split(u32 num, struct vring_desc_state_split **desc_state, struct vring_desc_extra **desc_extra) @@ -2262,10 +2275,6 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM)) vq->weak_barriers = false; - vq->split.queue_dma_addr = 0; - vq->split.queue_size_in_bytes = 0; - - vq->split.vring = vring; vq->split.avail_flags_shadow = 0; vq->split.avail_idx_shadow = 0; @@ -2283,8 +2292,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, return NULL; } - vq->split.desc_state = state; - vq->split.desc_extra = extra; + vring_virtqueue_attach_split(vq, vring, state, extra); /* Put everything in free lists. */ vq->free_head = 0;
Separate the logic of attach vring, subsequent patches will call it separately. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/virtio/virtio_ring.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-)