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 | |