diff options
Diffstat (limited to 'include/linux/virtio_ring.h')
| -rw-r--r-- | include/linux/virtio_ring.h | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index 1a4ed49f647..abe481ed990 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h @@ -15,9 +15,13 @@ /* This marks a buffer as write-only (otherwise read-only). */ #define VRING_DESC_F_WRITE 2 -/* This means don't notify other side when buffer added. */ +/* The Host uses this in used->flags to advise the Guest: don't kick me when + * you add a buffer. It's unreliable, so it's simply an optimization. Guest + * will still kick if it's out of buffers. */ #define VRING_USED_F_NO_NOTIFY 1 -/* This means don't interrupt guest when buffer consumed. */ +/* The Guest uses this in avail->flags to advise the Host: don't interrupt me + * when you consume a buffer. It's unreliable, so it's simply an + * optimization. */ #define VRING_AVAIL_F_NO_INTERRUPT 1 /* Virtio ring descriptors: 16 bytes. These can chain together via "next". */ @@ -89,7 +93,7 @@ struct vring { * }; */ static inline void vring_init(struct vring *vr, unsigned int num, void *p, - unsigned int pagesize) + unsigned long pagesize) { vr->num = num; vr->desc = p; @@ -98,7 +102,7 @@ static inline void vring_init(struct vring *vr, unsigned int num, void *p, & ~(pagesize - 1)); } -static inline unsigned vring_size(unsigned int num, unsigned int pagesize) +static inline unsigned vring_size(unsigned int num, unsigned long pagesize) { return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (2 + num) + pagesize - 1) & ~(pagesize - 1)) @@ -114,7 +118,7 @@ struct virtqueue *vring_new_virtqueue(unsigned int num, struct virtio_device *vdev, void *pages, void (*notify)(struct virtqueue *vq), - bool (*callback)(struct virtqueue *vq)); + void (*callback)(struct virtqueue *vq)); void vring_del_virtqueue(struct virtqueue *vq); irqreturn_t vring_interrupt(int irq, void *_vq); |