1a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich/**************************************************************************** 2a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich **************************************************************************** 3a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** 4a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** This header was automatically generated from a Linux kernel header 5a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** of the same name, to make information necessary for userspace to 6a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** call into the kernel available to libc. It contains only constants, 7a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** structures, and macros generated from the original header, and thus, 8a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** contains no copyrightable information. 9a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** 10a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** To edit the content of this header, modify the corresponding 11a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** source file (e.g. under external/kernel-headers/original/) then 12a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** run bionic/libc/kernel/tools/update_all.py 13a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** 14a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** Any manual change here will be lost the next time this script will 15a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** be run. You've been warned! 16a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich *** 17a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich **************************************************************************** 18a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich ****************************************************************************/ 19655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#ifndef _UAPI_LINUX_VIRTIO_RING_H 20655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#define _UAPI_LINUX_VIRTIO_RING_H 2105d08e9716b5974d6ed08973f44930804890b902Christopher Ferris#include <stdint.h> 22655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#include <linux/types.h> 2305d08e9716b5974d6ed08973f44930804890b902Christopher Ferris#include <linux/virtio_types.h> 2405d08e9716b5974d6ed08973f44930804890b902Christopher Ferris#define VRING_DESC_F_NEXT 1 25655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#define VRING_DESC_F_WRITE 2 26655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#define VRING_DESC_F_INDIRECT 4 27655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#define VRING_USED_F_NO_NOTIFY 1 28655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#define VRING_AVAIL_F_NO_INTERRUPT 1 29655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#define VIRTIO_RING_F_INDIRECT_DESC 28 30655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#define VIRTIO_RING_F_EVENT_IDX 29 31655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Chengstruct vring_desc { 3205d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio64 addr; 3305d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio32 len; 3405d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio16 flags; 3505d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio16 next; 36655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng}; 37655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Chengstruct vring_avail { 3805d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio16 flags; 3905d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio16 idx; 4005d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio16 ring[]; 41655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng}; 42655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Chengstruct vring_used_elem { 4305d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio32 id; 4405d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio32 len; 45655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng}; 46655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Chengstruct vring_used { 4705d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio16 flags; 4805d08e9716b5974d6ed08973f44930804890b902Christopher Ferris __virtio16 idx; 49d7db594b8d1dab36b711bd887a9dd21675c87243Tao Bao struct vring_used_elem ring[]; 50655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng}; 51655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Chengstruct vring { 52d7db594b8d1dab36b711bd887a9dd21675c87243Tao Bao unsigned int num; 53d7db594b8d1dab36b711bd887a9dd21675c87243Tao Bao struct vring_desc * desc; 54d7db594b8d1dab36b711bd887a9dd21675c87243Tao Bao struct vring_avail * avail; 55d7db594b8d1dab36b711bd887a9dd21675c87243Tao Bao struct vring_used * used; 56655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng}; 5705d08e9716b5974d6ed08973f44930804890b902Christopher Ferris#define VRING_AVAIL_ALIGN_SIZE 2 5805d08e9716b5974d6ed08973f44930804890b902Christopher Ferris#define VRING_USED_ALIGN_SIZE 4 5905d08e9716b5974d6ed08973f44930804890b902Christopher Ferris#define VRING_DESC_ALIGN_SIZE 16 60655a7c081f83b8351ed5f11a6c6accd9458293a8Ben Cheng#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num]) 6105d08e9716b5974d6ed08973f44930804890b902Christopher Ferris#define vring_avail_event(vr) (* (__virtio16 *) & (vr)->used->ring[(vr)->num]) 62a67e4de6620b570dabe0f92985228af0d0204f2cNick Kralevich#endif 63