| Message ID | 20210602021536.39525-5-jasowang@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Packed virtqueue state support for vDPA | expand |
On Wed, Jun 02, 2021 at 10:15:36AM +0800, Jason Wang wrote: > From: Eli Cohen <elic@nvidia.com> > > Clear the available index as part of the initialization process to > clear and values that might be left from previous usage of the device. > For example, if the device was previously used by vhost_vdpa and now > probed by vhost_vdpa, you want to start with indices. > > Fixes: c043b4a8cf3b ("virtio: introduce a vDPA based transport") > Signed-off-by: Eli Cohen <elic@nvidia.com> > Signed-off-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Eli Cohen <elic@nvidia.com> > --- > drivers/virtio/virtio_vdpa.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c > index e28acf482e0c..e1a141135992 100644 > --- a/drivers/virtio/virtio_vdpa.c > +++ b/drivers/virtio/virtio_vdpa.c > @@ -142,6 +142,8 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, > struct vdpa_callback cb; > struct virtqueue *vq; > u64 desc_addr, driver_addr, device_addr; > + /* Assume split virtqueue, switch to packed if necessary */ > + struct vdpa_vq_state state = {0}; > unsigned long flags; > u32 align, num; > int err; > @@ -191,6 +193,19 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, > goto err_vq; > } > > + /* reset virtqueue state index */ > + if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED)) { > + struct vdpa_vq_state_packed *s = &state.packed; > + > + s->last_avail_counter = 1; > + s->last_avail_idx = 0; > + s->last_used_counter = 1; > + s->last_used_idx = 0; > + } > + err = ops->set_vq_state(vdpa, index, &state); > + if (err) > + goto err_vq; > + > ops->set_vq_ready(vdpa, index, 1); > > vq->priv = info; > -- > 2.25.1 >
diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index e28acf482e0c..e1a141135992 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -142,6 +142,8 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, struct vdpa_callback cb; struct virtqueue *vq; u64 desc_addr, driver_addr, device_addr; + /* Assume split virtqueue, switch to packed if necessary */ + struct vdpa_vq_state state = {0}; unsigned long flags; u32 align, num; int err; @@ -191,6 +193,19 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, goto err_vq; } + /* reset virtqueue state index */ + if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED)) { + struct vdpa_vq_state_packed *s = &state.packed; + + s->last_avail_counter = 1; + s->last_avail_idx = 0; + s->last_used_counter = 1; + s->last_used_idx = 0; + } + err = ops->set_vq_state(vdpa, index, &state); + if (err) + goto err_vq; + ops->set_vq_ready(vdpa, index, 1); vq->priv = info;