diff options
Diffstat (limited to 'drivers/net/virtio/virtqueue.h')
| -rw-r--r-- | drivers/net/virtio/virtqueue.h | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h index b1070e05..2e120861 100644 --- a/drivers/net/virtio/virtqueue.h +++ b/drivers/net/virtio/virtqueue.h @@ -71,8 +71,14 @@ struct rte_mbuf; /** * Return the physical address (or virtual address in case of * virtio-user) of mbuf data buffer. + * + * The address is firstly casted to the word size (sizeof(uintptr_t)) + * before casting it to uint64_t. This is to make it work with different + * combination of word size (64 bit and 32 bit) and virtio device + * (virtio-pci and virtio-user). */ -#define VIRTIO_MBUF_ADDR(mb, vq) (*(uint64_t *)((uintptr_t)(mb) + (vq)->offset)) +#define VIRTIO_MBUF_ADDR(mb, vq) \ + ((uint64_t)(*(uintptr_t *)((uintptr_t)(mb) + (vq)->offset))) #else #define VIRTIO_MBUF_ADDR(mb, vq) ((mb)->buf_physaddr) #endif @@ -274,7 +280,21 @@ vring_desc_init(struct vring_desc *dp, uint16_t n) /** * Tell the backend not to interrupt us. */ -void virtqueue_disable_intr(struct virtqueue *vq); +static inline void +virtqueue_disable_intr(struct virtqueue *vq) +{ + vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT; +} + +/** + * Tell the backend to interrupt us. + */ +static inline void +virtqueue_enable_intr(struct virtqueue *vq) +{ + vq->vq_ring.avail->flags &= (~VRING_AVAIL_F_NO_INTERRUPT); +} + /** * Dump virtqueue internal structures, for debug purpose only. */ |