| /**************************************************************************** |
| **************************************************************************** |
| *** |
| *** This header was automatically generated from a Linux kernel header |
| *** of the same name, to make information necessary for userspace to |
| *** call into the kernel available to libc. It contains only constants, |
| *** structures, and macros generated from the original header, and thus, |
| *** contains no copyrightable information. |
| *** |
| *** To edit the content of this header, modify the corresponding |
| *** source file (e.g. under external/kernel-headers/original/) then |
| *** run bionic/libc/kernel/tools/update_all.py |
| *** |
| *** Any manual change here will be lost the next time this script will |
| *** be run. You've been warned! |
| *** |
| **************************************************************************** |
| ****************************************************************************/ |
| #ifndef _UAPI_LINUX_VIRTIO_RING_H |
| #define _UAPI_LINUX_VIRTIO_RING_H |
| #include <stdint.h> |
| #include <linux/types.h> |
| #include <linux/virtio_types.h> |
| #define VRING_DESC_F_NEXT 1 |
| #define VRING_DESC_F_WRITE 2 |
| #define VRING_DESC_F_INDIRECT 4 |
| #define VRING_PACKED_DESC_F_AVAIL 7 |
| #define VRING_PACKED_DESC_F_USED 15 |
| #define VRING_USED_F_NO_NOTIFY 1 |
| #define VRING_AVAIL_F_NO_INTERRUPT 1 |
| #define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 |
| #define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 |
| #define VRING_PACKED_EVENT_FLAG_DESC 0x2 |
| #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; |
| __virtio16 flags; |
| __virtio16 next; |
| }; |
| struct vring_avail { |
| __virtio16 flags; |
| __virtio16 idx; |
| __virtio16 ring[]; |
| }; |
| 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; |
| 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; |
| vring_desc_t * desc; |
| vring_avail_t * avail; |
| vring_used_t * used; |
| }; |
| #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; |
| }; |
| struct vring_packed_desc { |
| __le64 addr; |
| __le32 len; |
| __le16 id; |
| __le16 flags; |
| }; |
| #endif |