| Message ID | 20220726072225.19884-19-xuanzhuo@linux.alibaba.com (mailing list archive) |
|---|---|
| State | Superseded |
| 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 packed to create vring queue. > > This feature is required for subsequent virtuqueue reset vring. > > Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> > --- > drivers/virtio/virtio_ring.c | 80 +++++++++++++++++++++++------------- > 1 file changed, 51 insertions(+), 29 deletions(-) > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > index 891900b31c3d..10cc2b7e3588 100644 > --- a/drivers/virtio/virtio_ring.c > +++ b/drivers/virtio/virtio_ring.c > @@ -1857,19 +1857,10 @@ static void vring_free_packed(struct vring_virtqueue_packed *vring_packed, > kfree(vring_packed->desc_extra); > } > > -static struct virtqueue *vring_create_virtqueue_packed( > - unsigned int index, > - unsigned int num, > - unsigned int vring_align, > - struct virtio_device *vdev, > - bool weak_barriers, > - bool may_reduce_num, > - bool context, > - bool (*notify)(struct virtqueue *), > - void (*callback)(struct virtqueue *), > - const char *name) > +static int vring_alloc_queue_packed(struct vring_virtqueue_packed *vring_packed, > + struct virtio_device *vdev, > + u32 num) > { > - struct vring_virtqueue *vq; > struct vring_packed_desc *ring; > struct vring_packed_desc_event *driver, *device; > dma_addr_t ring_dma_addr, driver_event_dma_addr, device_event_dma_addr; > @@ -1881,7 +1872,11 @@ static struct virtqueue *vring_create_virtqueue_packed( > &ring_dma_addr, > GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); > if (!ring) > - goto err_ring; > + goto err; > + > + vring_packed->vring.desc = ring; > + vring_packed->ring_dma_addr = ring_dma_addr; > + vring_packed->ring_size_in_bytes = ring_size_in_bytes; > > event_size_in_bytes = sizeof(struct vring_packed_desc_event); > > @@ -1889,13 +1884,47 @@ static struct virtqueue *vring_create_virtqueue_packed( > &driver_event_dma_addr, > GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); > if (!driver) > - goto err_driver; > + goto err; > + > + vring_packed->vring.driver = driver; > + vring_packed->event_size_in_bytes = event_size_in_bytes; > + vring_packed->driver_event_dma_addr = driver_event_dma_addr; > > device = vring_alloc_queue(vdev, event_size_in_bytes, > &device_event_dma_addr, > GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); > if (!device) > - goto err_device; > + goto err; > + > + vring_packed->vring.device = device; > + vring_packed->device_event_dma_addr = device_event_dma_addr; > + > + vring_packed->vring.num = num; > + > + return 0; > + > +err: > + vring_free_packed(vring_packed, vdev); > + return -ENOMEM; > +} > + > +static struct virtqueue *vring_create_virtqueue_packed( > + unsigned int index, > + unsigned int num, > + unsigned int vring_align, > + struct virtio_device *vdev, > + bool weak_barriers, > + bool may_reduce_num, > + bool context, > + bool (*notify)(struct virtqueue *), > + void (*callback)(struct virtqueue *), > + const char *name) > +{ > + struct vring_virtqueue_packed vring_packed = {}; > + struct vring_virtqueue *vq; > + > + if (vring_alloc_queue_packed(&vring_packed, vdev, num)) > + goto err_ring; > > vq = kmalloc(sizeof(*vq), GFP_KERNEL); > if (!vq) > @@ -1918,17 +1947,14 @@ static struct virtqueue *vring_create_virtqueue_packed( > vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) && > !context; > > - vq->packed.ring_dma_addr = ring_dma_addr; > - vq->packed.driver_event_dma_addr = driver_event_dma_addr; > - vq->packed.device_event_dma_addr = device_event_dma_addr; > + vq->packed.ring_dma_addr = vring_packed.ring_dma_addr; > + vq->packed.driver_event_dma_addr = vring_packed.driver_event_dma_addr; > + vq->packed.device_event_dma_addr = vring_packed.device_event_dma_addr; > > - vq->packed.ring_size_in_bytes = ring_size_in_bytes; > - vq->packed.event_size_in_bytes = event_size_in_bytes; > + vq->packed.ring_size_in_bytes = vring_packed.ring_size_in_bytes; > + vq->packed.event_size_in_bytes = vring_packed.event_size_in_bytes; > > - vq->packed.vring.num = num; > - vq->packed.vring.desc = ring; > - vq->packed.vring.driver = driver; > - vq->packed.vring.device = device; > + vq->packed.vring = vring_packed.vring; > > vq->packed.next_avail_idx = 0; > vq->packed.avail_wrap_counter = 1; > @@ -1967,11 +1993,7 @@ static struct virtqueue *vring_create_virtqueue_packed( > err_desc_state: > kfree(vq); > err_vq: > - vring_free_queue(vdev, event_size_in_bytes, device, device_event_dma_addr); > -err_device: > - vring_free_queue(vdev, event_size_in_bytes, driver, driver_event_dma_addr); > -err_driver: > - vring_free_queue(vdev, ring_size_in_bytes, ring, ring_dma_addr); > + vring_free_packed(&vring_packed, vdev); > err_ring: > return NULL; > }
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 891900b31c3d..10cc2b7e3588 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1857,19 +1857,10 @@ static void vring_free_packed(struct vring_virtqueue_packed *vring_packed, kfree(vring_packed->desc_extra); } -static struct virtqueue *vring_create_virtqueue_packed( - unsigned int index, - unsigned int num, - unsigned int vring_align, - struct virtio_device *vdev, - bool weak_barriers, - bool may_reduce_num, - bool context, - bool (*notify)(struct virtqueue *), - void (*callback)(struct virtqueue *), - const char *name) +static int vring_alloc_queue_packed(struct vring_virtqueue_packed *vring_packed, + struct virtio_device *vdev, + u32 num) { - struct vring_virtqueue *vq; struct vring_packed_desc *ring; struct vring_packed_desc_event *driver, *device; dma_addr_t ring_dma_addr, driver_event_dma_addr, device_event_dma_addr; @@ -1881,7 +1872,11 @@ static struct virtqueue *vring_create_virtqueue_packed( &ring_dma_addr, GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); if (!ring) - goto err_ring; + goto err; + + vring_packed->vring.desc = ring; + vring_packed->ring_dma_addr = ring_dma_addr; + vring_packed->ring_size_in_bytes = ring_size_in_bytes; event_size_in_bytes = sizeof(struct vring_packed_desc_event); @@ -1889,13 +1884,47 @@ static struct virtqueue *vring_create_virtqueue_packed( &driver_event_dma_addr, GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); if (!driver) - goto err_driver; + goto err; + + vring_packed->vring.driver = driver; + vring_packed->event_size_in_bytes = event_size_in_bytes; + vring_packed->driver_event_dma_addr = driver_event_dma_addr; device = vring_alloc_queue(vdev, event_size_in_bytes, &device_event_dma_addr, GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); if (!device) - goto err_device; + goto err; + + vring_packed->vring.device = device; + vring_packed->device_event_dma_addr = device_event_dma_addr; + + vring_packed->vring.num = num; + + return 0; + +err: + vring_free_packed(vring_packed, vdev); + return -ENOMEM; +} + +static struct virtqueue *vring_create_virtqueue_packed( + unsigned int index, + unsigned int num, + unsigned int vring_align, + struct virtio_device *vdev, + bool weak_barriers, + bool may_reduce_num, + bool context, + bool (*notify)(struct virtqueue *), + void (*callback)(struct virtqueue *), + const char *name) +{ + struct vring_virtqueue_packed vring_packed = {}; + struct vring_virtqueue *vq; + + if (vring_alloc_queue_packed(&vring_packed, vdev, num)) + goto err_ring; vq = kmalloc(sizeof(*vq), GFP_KERNEL); if (!vq) @@ -1918,17 +1947,14 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) && !context; - vq->packed.ring_dma_addr = ring_dma_addr; - vq->packed.driver_event_dma_addr = driver_event_dma_addr; - vq->packed.device_event_dma_addr = device_event_dma_addr; + vq->packed.ring_dma_addr = vring_packed.ring_dma_addr; + vq->packed.driver_event_dma_addr = vring_packed.driver_event_dma_addr; + vq->packed.device_event_dma_addr = vring_packed.device_event_dma_addr; - vq->packed.ring_size_in_bytes = ring_size_in_bytes; - vq->packed.event_size_in_bytes = event_size_in_bytes; + vq->packed.ring_size_in_bytes = vring_packed.ring_size_in_bytes; + vq->packed.event_size_in_bytes = vring_packed.event_size_in_bytes; - vq->packed.vring.num = num; - vq->packed.vring.desc = ring; - vq->packed.vring.driver = driver; - vq->packed.vring.device = device; + vq->packed.vring = vring_packed.vring; vq->packed.next_avail_idx = 0; vq->packed.avail_wrap_counter = 1; @@ -1967,11 +1993,7 @@ static struct virtqueue *vring_create_virtqueue_packed( err_desc_state: kfree(vq); err_vq: - vring_free_queue(vdev, event_size_in_bytes, device, device_event_dma_addr); -err_device: - vring_free_queue(vdev, event_size_in_bytes, driver, driver_event_dma_addr); -err_driver: - vring_free_queue(vdev, ring_size_in_bytes, ring, ring_dma_addr); + vring_free_packed(&vring_packed, vdev); err_ring: return NULL; }
Separate the logic of packed to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/virtio/virtio_ring.c | 80 +++++++++++++++++++++++------------- 1 file changed, 51 insertions(+), 29 deletions(-)