LXR linux/include/linux/vhost

   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
  39struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags);
  40void vhost_iotlb_free(struct vhost_iotlb *iotlb);
  41void vhost_iotlb_reset(struct vhost_iotlb *iotlb);
  42
  43struct vhost_iotlb_map *
  44vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last);
  45struct vhost_iotlb_map *
  46vhost_iotlb_itree_next(struct vhost_iotlb_map *map, u64 start, u64 last);
  47
  48void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
  49                          struct vhost_iotlb_map *map);
  50#endif
  51