Linux lhjmq-records 5.15.0-118-generic #128-Ubuntu SMP Fri Jul 5 09:28:59 UTC 2024 x86_64
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_VHOST_IOTLB_H
#define _LINUX_VHOST_IOTLB_H
#include <linux/interval_tree_generic.h>
struct vhost_iotlb_map {
struct rb_node rb;
struct list_head link;
u64 start;
u64 last;
u64 size;
u64 addr;
#define VHOST_MAP_RO 0x1
#define VHOST_MAP_WO 0x2
#define VHOST_MAP_RW 0x3
u32 perm;
u32 flags_padding;
u64 __subtree_last;
void *opaque;
};
#define VHOST_IOTLB_FLAG_RETIRE 0x1
struct vhost_iotlb {
struct rb_root_cached root;
struct list_head list;
unsigned int limit;
unsigned int nmaps;
unsigned int flags;
};
int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb, u64 start, u64 last,
u64 addr, unsigned int perm, void *opaque);
int vhost_iotlb_add_range(struct vhost_iotlb *iotlb, u64 start, u64 last,
u64 addr, unsigned int perm);
void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last);
struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags);
void vhost_iotlb_free(struct vhost_iotlb *iotlb);
void vhost_iotlb_reset(struct vhost_iotlb *iotlb);
struct vhost_iotlb_map *
vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last);
struct vhost_iotlb_map *
vhost_iotlb_itree_next(struct vhost_iotlb_map *map, u64 start, u64 last);
void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
struct vhost_iotlb_map *map);
#endif
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