Jason Wang | 0bbe306 | 2020-03-26 22:01:19 +0800 | [diff] [blame] | 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; |
Xie Yongji | 59dfe4f | 2021-08-31 18:36:28 +0800 | [diff] [blame] | 20 | void *opaque; |
Jason Wang | 0bbe306 | 2020-03-26 22:01:19 +0800 | [diff] [blame] | 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 | |
Xie Yongji | 59dfe4f | 2021-08-31 18:36:28 +0800 | [diff] [blame] | 33 | int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb, u64 start, u64 last, |
| 34 | u64 addr, unsigned int perm, void *opaque); |
Jason Wang | 0bbe306 | 2020-03-26 22:01:19 +0800 | [diff] [blame] | 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 | |
Gautam Dawar | 1cb1089 | 2022-03-30 23:33:48 +0530 | [diff] [blame] | 39 | void vhost_iotlb_init(struct vhost_iotlb *iotlb, unsigned int limit, |
| 40 | unsigned int flags); |
Jason Wang | 0bbe306 | 2020-03-26 22:01:19 +0800 | [diff] [blame] | 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 |