1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 *** To edit the content of this header, modify the corresponding 11 *** source file (e.g. under external/kernel-headers/original/) then 12 *** run bionic/libc/kernel/tools/update_all.py 13 *** 14 *** Any manual change here will be lost the next time this script will 15 *** be run. You've been warned! 16 *** 17 **************************************************************************** 18 ****************************************************************************/ 19 #ifndef _UAPI_LINUX_VIRTIO_RING_H 20 #define _UAPI_LINUX_VIRTIO_RING_H 21 #include <linux/types.h> 22 #define VRING_DESC_F_NEXT 1 23 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 24 #define VRING_DESC_F_WRITE 2 25 #define VRING_DESC_F_INDIRECT 4 26 #define VRING_USED_F_NO_NOTIFY 1 27 #define VRING_AVAIL_F_NO_INTERRUPT 1 28 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 29 #define VIRTIO_RING_F_INDIRECT_DESC 28 30 #define VIRTIO_RING_F_EVENT_IDX 29 31 struct vring_desc { 32 __u64 addr; 33 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 34 __u32 len; 35 __u16 flags; 36 __u16 next; 37 }; 38 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 39 struct vring_avail { 40 __u16 flags; 41 __u16 idx; 42 __u16 ring[]; 43 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 44 }; 45 struct vring_used_elem { 46 __u32 id; 47 __u32 len; 48 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 49 }; 50 struct vring_used { 51 __u16 flags; 52 __u16 idx; 53 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 54 struct vring_used_elem ring[]; 55 }; 56 struct vring { 57 unsigned int num; 58 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 59 struct vring_desc *desc; 60 struct vring_avail *avail; 61 struct vring_used *used; 62 }; 63 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 64 #define vring_used_event(vr) ((vr)->avail->ring[(vr)->num]) 65 #define vring_avail_event(vr) (*(__u16 *)&(vr)->used->ring[(vr)->num]) 66 #endif 67
