| Message ID | 20220726072225.19884-21-xuanzhuo@linux.alibaba.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | virtio pci support VIRTIO_F_RING_RESET | expand |
在 2022/7/26 15:22, Xuan Zhuo 写道: > Separate the logic of initializing vring, and subsequent patches will > call it separately. > > This function completes the variable initialization of packed vring. It > together with the logic of atatch constitutes the initialization of > vring. > > Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> > --- > drivers/virtio/virtio_ring.c | 28 +++++++++++++++++----------- > 1 file changed, 17 insertions(+), 11 deletions(-) > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > index 32590d763c3b..fc4e3db9f93b 100644 > --- a/drivers/virtio/virtio_ring.c > +++ b/drivers/virtio/virtio_ring.c > @@ -1935,6 +1935,22 @@ static int vring_alloc_state_extra_packed(struct vring_virtqueue_packed *vring_p > return -ENOMEM; > } > > +static void virtqueue_vring_init_packed(struct vring_virtqueue_packed *vring_packed, > + bool callback) > +{ > + vring_packed->next_avail_idx = 0; > + vring_packed->avail_wrap_counter = 1; > + vring_packed->event_flags_shadow = 0; > + vring_packed->avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; > + > + /* No callback? Tell other side not to bother us. */ > + if (!callback) { > + vring_packed->event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; > + vring_packed->vring.driver->flags = > + cpu_to_le16(vring_packed->event_flags_shadow); > + } > +} > + > static struct virtqueue *vring_create_virtqueue_packed( > unsigned int index, > unsigned int num, > @@ -1984,11 +2000,6 @@ static struct virtqueue *vring_create_virtqueue_packed( > > vq->packed.vring = vring_packed.vring; > > - vq->packed.next_avail_idx = 0; > - vq->packed.avail_wrap_counter = 1; > - vq->packed.event_flags_shadow = 0; > - vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; > - > err = vring_alloc_state_extra_packed(&vring_packed); > if (err) > goto err_state_extra; > @@ -1996,12 +2007,7 @@ static struct virtqueue *vring_create_virtqueue_packed( > vq->packed.desc_state = vring_packed.desc_state; > vq->packed.desc_extra = vring_packed.desc_extra; > > - /* No callback? Tell other side not to bother us. */ > - if (!callback) { > - vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; > - vq->packed.vring.driver->flags = > - cpu_to_le16(vq->packed.event_flags_shadow); > - } > + virtqueue_vring_init_packed(&vring_packed, !!callback); > > virtqueue_init(vq, num); >
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 32590d763c3b..fc4e3db9f93b 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1935,6 +1935,22 @@ static int vring_alloc_state_extra_packed(struct vring_virtqueue_packed *vring_p return -ENOMEM; } +static void virtqueue_vring_init_packed(struct vring_virtqueue_packed *vring_packed, + bool callback) +{ + vring_packed->next_avail_idx = 0; + vring_packed->avail_wrap_counter = 1; + vring_packed->event_flags_shadow = 0; + vring_packed->avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; + + /* No callback? Tell other side not to bother us. */ + if (!callback) { + vring_packed->event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; + vring_packed->vring.driver->flags = + cpu_to_le16(vring_packed->event_flags_shadow); + } +} + static struct virtqueue *vring_create_virtqueue_packed( unsigned int index, unsigned int num, @@ -1984,11 +2000,6 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->packed.vring = vring_packed.vring; - vq->packed.next_avail_idx = 0; - vq->packed.avail_wrap_counter = 1; - vq->packed.event_flags_shadow = 0; - vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; - err = vring_alloc_state_extra_packed(&vring_packed); if (err) goto err_state_extra; @@ -1996,12 +2007,7 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->packed.desc_state = vring_packed.desc_state; vq->packed.desc_extra = vring_packed.desc_extra; - /* No callback? Tell other side not to bother us. */ - if (!callback) { - vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; - vq->packed.vring.driver->flags = - cpu_to_le16(vq->packed.event_flags_shadow); - } + virtqueue_vring_init_packed(&vring_packed, !!callback); virtqueue_init(vq, num);
Separate the logic of initializing vring, and subsequent patches will call it separately. This function completes the variable initialization of packed vring. It together with the logic of atatch constitutes the initialization of vring. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/virtio/virtio_ring.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-)