1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _LINUX_VHOST_IOTLB_H 3*4882a593Smuzhiyun #define _LINUX_VHOST_IOTLB_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/interval_tree_generic.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun struct vhost_iotlb_map { 8*4882a593Smuzhiyun struct rb_node rb; 9*4882a593Smuzhiyun struct list_head link; 10*4882a593Smuzhiyun u64 start; 11*4882a593Smuzhiyun u64 last; 12*4882a593Smuzhiyun u64 size; 13*4882a593Smuzhiyun u64 addr; 14*4882a593Smuzhiyun #define VHOST_MAP_RO 0x1 15*4882a593Smuzhiyun #define VHOST_MAP_WO 0x2 16*4882a593Smuzhiyun #define VHOST_MAP_RW 0x3 17*4882a593Smuzhiyun u32 perm; 18*4882a593Smuzhiyun u32 flags_padding; 19*4882a593Smuzhiyun u64 __subtree_last; 20*4882a593Smuzhiyun }; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #define VHOST_IOTLB_FLAG_RETIRE 0x1 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun struct vhost_iotlb { 25*4882a593Smuzhiyun struct rb_root_cached root; 26*4882a593Smuzhiyun struct list_head list; 27*4882a593Smuzhiyun unsigned int limit; 28*4882a593Smuzhiyun unsigned int nmaps; 29*4882a593Smuzhiyun unsigned int flags; 30*4882a593Smuzhiyun }; 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun int vhost_iotlb_add_range(struct vhost_iotlb *iotlb, u64 start, u64 last, 33*4882a593Smuzhiyun u64 addr, unsigned int perm); 34*4882a593Smuzhiyun void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last); 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags); 37*4882a593Smuzhiyun void vhost_iotlb_free(struct vhost_iotlb *iotlb); 38*4882a593Smuzhiyun void vhost_iotlb_reset(struct vhost_iotlb *iotlb); 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun struct vhost_iotlb_map * 41*4882a593Smuzhiyun vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last); 42*4882a593Smuzhiyun struct vhost_iotlb_map * 43*4882a593Smuzhiyun vhost_iotlb_itree_next(struct vhost_iotlb_map *map, u64 start, u64 last); 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun void vhost_iotlb_map_free(struct vhost_iotlb *iotlb, 46*4882a593Smuzhiyun struct vhost_iotlb_map *map); 47*4882a593Smuzhiyun #endif 48