Merge tag 'perf-tools-for-v5.15-2021-09-11' of git://git.kernel.org/pub/scm/linux...
[linux-2.6-microblaze.git] / include / linux / vhost_iotlb.h
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 struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags);
40 void vhost_iotlb_free(struct vhost_iotlb *iotlb);
41 void vhost_iotlb_reset(struct vhost_iotlb *iotlb);
42
43 struct vhost_iotlb_map *
44 vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last);
45 struct vhost_iotlb_map *
46 vhost_iotlb_itree_next(struct vhost_iotlb_map *map, u64 start, u64 last);
47
48 void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
49                           struct vhost_iotlb_map *map);
50 #endif