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