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85 lines
2.8 KiB
85 lines
2.8 KiB
4 months ago
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/****************************************************************************
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****************************************************************************
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***
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*** This header was automatically generated from a Linux kernel header
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*** of the same name, to make information necessary for userspace to
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*** call into the kernel available to libc. It contains only constants,
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*** structures, and macros generated from the original header, and thus,
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*** contains no copyrightable information.
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***
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*** To edit the content of this header, modify the corresponding
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*** source file (e.g. under external/kernel-headers/original/) then
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*** run bionic/libc/kernel/tools/update_all.py
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***
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*** Any manual change here will be lost the next time this script will
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*** be run. You've been warned!
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***
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****************************************************************************
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****************************************************************************/
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#ifndef _UAPI_LINUX_VIRTIO_RING_H
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#define _UAPI_LINUX_VIRTIO_RING_H
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#include <stdint.h>
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#include <linux/types.h>
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#include <linux/virtio_types.h>
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#define VRING_DESC_F_NEXT 1
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#define VRING_DESC_F_WRITE 2
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#define VRING_DESC_F_INDIRECT 4
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#define VRING_PACKED_DESC_F_AVAIL 7
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#define VRING_PACKED_DESC_F_USED 15
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#define VRING_USED_F_NO_NOTIFY 1
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#define VRING_AVAIL_F_NO_INTERRUPT 1
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#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0
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#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1
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#define VRING_PACKED_EVENT_FLAG_DESC 0x2
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#define VRING_PACKED_EVENT_F_WRAP_CTR 15
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#define VIRTIO_RING_F_INDIRECT_DESC 28
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#define VIRTIO_RING_F_EVENT_IDX 29
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#define VRING_AVAIL_ALIGN_SIZE 2
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#define VRING_USED_ALIGN_SIZE 4
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#define VRING_DESC_ALIGN_SIZE 16
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struct vring_desc {
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__virtio64 addr;
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__virtio32 len;
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__virtio16 flags;
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__virtio16 next;
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};
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struct vring_avail {
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__virtio16 flags;
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__virtio16 idx;
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__virtio16 ring[];
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};
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struct vring_used_elem {
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__virtio32 id;
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__virtio32 len;
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};
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typedef struct vring_used_elem __attribute__((aligned(VRING_USED_ALIGN_SIZE))) vring_used_elem_t;
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struct vring_used {
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__virtio16 flags;
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__virtio16 idx;
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vring_used_elem_t ring[];
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};
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typedef struct vring_desc __attribute__((aligned(VRING_DESC_ALIGN_SIZE))) vring_desc_t;
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typedef struct vring_avail __attribute__((aligned(VRING_AVAIL_ALIGN_SIZE))) vring_avail_t;
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typedef struct vring_used __attribute__((aligned(VRING_USED_ALIGN_SIZE))) vring_used_t;
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struct vring {
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unsigned int num;
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vring_desc_t * desc;
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vring_avail_t * avail;
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vring_used_t * used;
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};
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#ifndef VIRTIO_RING_NO_LEGACY
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#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
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#define vring_avail_event(vr) (* (__virtio16 *) & (vr)->used->ring[(vr)->num])
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#endif
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struct vring_packed_desc_event {
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__le16 off_wrap;
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__le16 flags;
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};
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struct vring_packed_desc {
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__le64 addr;
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__le32 len;
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__le16 id;
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__le16 flags;
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};
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#endif
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