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
7 struct 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
25 struct 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
33 int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb, u64 start, u64 last,
34 u64 addr, unsigned int perm, void *opaque);
35 int vhost_iotlb_add_range(struct vhost_iotlb *iotlb, u64 start, u64 last,
36 u64 addr, unsigned int perm);
37 void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last);
38
39 void vhost_iotlb_init(struct vhost_iotlb *iotlb, unsigned int limit,
40 unsigned int flags);
41 struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags);
42 void vhost_iotlb_free(struct vhost_iotlb *iotlb);
43 void vhost_iotlb_reset(struct vhost_iotlb *iotlb);
44
45 struct vhost_iotlb_map *
46 vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last);
47 struct vhost_iotlb_map *
48 vhost_iotlb_itree_next(struct vhost_iotlb_map *map, u64 start, u64 last);
49
50 void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
51 struct vhost_iotlb_map *map);
52 #endif
53
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