diff options
Diffstat (limited to 'libc/kernel/uapi/linux/virtio_ring.h')
| -rw-r--r-- | libc/kernel/uapi/linux/virtio_ring.h | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/libc/kernel/uapi/linux/virtio_ring.h b/libc/kernel/uapi/linux/virtio_ring.h index ba75940f7..24cf671f1 100644 --- a/libc/kernel/uapi/linux/virtio_ring.h +++ b/libc/kernel/uapi/linux/virtio_ring.h @@ -34,6 +34,9 @@ #define VRING_PACKED_EVENT_F_WRAP_CTR 15 #define VIRTIO_RING_F_INDIRECT_DESC 28 #define VIRTIO_RING_F_EVENT_IDX 29 +#define VRING_AVAIL_ALIGN_SIZE 2 +#define VRING_USED_ALIGN_SIZE 4 +#define VRING_DESC_ALIGN_SIZE 16 struct vring_desc { __virtio64 addr; __virtio32 len; @@ -49,22 +52,25 @@ struct vring_used_elem { __virtio32 id; __virtio32 len; }; +typedef struct vring_used_elem __attribute__((aligned(VRING_USED_ALIGN_SIZE))) vring_used_elem_t; struct vring_used { __virtio16 flags; __virtio16 idx; - struct vring_used_elem ring[]; + vring_used_elem_t ring[]; }; +typedef struct vring_desc __attribute__((aligned(VRING_DESC_ALIGN_SIZE))) vring_desc_t; +typedef struct vring_avail __attribute__((aligned(VRING_AVAIL_ALIGN_SIZE))) vring_avail_t; +typedef struct vring_used __attribute__((aligned(VRING_USED_ALIGN_SIZE))) vring_used_t; struct vring { unsigned int num; - struct vring_desc * desc; - struct vring_avail * avail; - struct vring_used * used; + vring_desc_t * desc; + vring_avail_t * avail; + vring_used_t * used; }; -#define VRING_AVAIL_ALIGN_SIZE 2 -#define VRING_USED_ALIGN_SIZE 4 -#define VRING_DESC_ALIGN_SIZE 16 +#ifndef VIRTIO_RING_NO_LEGACY #define vring_used_event(vr) ((vr)->avail->ring[(vr)->num]) #define vring_avail_event(vr) (* (__virtio16 *) & (vr)->used->ring[(vr)->num]) +#endif struct vring_packed_desc_event { __le16 off_wrap; __le16 flags; |