1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_VHOST_IOTLB_H
3#define _LINUX_VHOST_IOTLB_H
4
5#include <linux/interval_tree_generic.h>
6
7struct vhost_iotlb_map {
8 struct rb_node rb;
9 struct list_head link;
10 u64 start;
11 u64 last;
12 u64 size;
13 u64 addr;
14#define VHOST_MAP_RO 0x1
15#define VHOST_MAP_WO 0x2
16#define VHOST_MAP_RW 0x3
17 u32 perm;
18 u32 flags_padding;
19 u64 __subtree_last;
20 void *opaque;
21};
22
23#define VHOST_IOTLB_FLAG_RETIRE 0x1
24
25struct vhost_iotlb {
26 struct rb_root_cached root;
27 struct list_head list;
28 unsigned int limit;
29 unsigned int nmaps;
30 unsigned int flags;
31};
32
33int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb, u64 start, u64 last,
34 u64 addr, unsigned int perm, void *opaque);
35int vhost_iotlb_add_range(struct vhost_iotlb *iotlb, u64 start, u64 last,
36 u64 addr, unsigned int perm);
37void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last);
38
39void vhost_iotlb_init(struct vhost_iotlb *iotlb, unsigned int limit,
40 unsigned int flags);
41struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags);
42void vhost_iotlb_free(struct vhost_iotlb *iotlb);
43void vhost_iotlb_reset(struct vhost_iotlb *iotlb);
44
45struct vhost_iotlb_map *
46vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last);
47struct vhost_iotlb_map *
48vhost_iotlb_itree_next(struct vhost_iotlb_map *map, u64 start, u64 last);
49
50void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
51 struct vhost_iotlb_map *map);
52#endif
53

source code of linux/include/linux/vhost_iotlb.h