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
 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