drivers/vhost/iotlb.c

25  * @iotlb: the IOTLB
28 void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
31 	vhost_iotlb_itree_remove(map, &iotlb->root);
34 	iotlb->nmaps--;
40  * @iotlb: the IOTLB
50 int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb,
65 		int err = vhost_iotlb_add_range_ctx(iotlb, start, mid, addr,
75 	if (iotlb->limit &&
76 	    iotlb->nmaps == iotlb->limit &&
77 	    iotlb->flags & VHOST_IOTLB_FLAG_RETIRE) {
78 		map = list_first_entry(&iotlb->list, typeof(*map), link);
79 		vhost_iotlb_map_free(iotlb, map);
93 	iotlb->nmaps++;
94 	vhost_iotlb_itree_insert(map, &iotlb->root);
97 	list_add_tail(&map->link, &iotlb->list);
103 int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
107 	return vhost_iotlb_add_range_ctx(iotlb, start, last,
114  * @iotlb: the IOTLB
118 void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last)
122 	while ((map = vhost_iotlb_itree_iter_first(&iotlb->root,
124 		vhost_iotlb_map_free(iotlb, map);
130  * @iotlb: the IOTLB that needs to be initialized
134 void vhost_iotlb_init(struct vhost_iotlb *iotlb, unsigned int limit,
137 	iotlb->root = RB_ROOT_CACHED;
138 	iotlb->limit = limit;
139 	iotlb->nmaps = 0;
140 	iotlb->flags = flags;
141 	INIT_LIST_HEAD(&iotlb->list);
154 	struct vhost_iotlb *iotlb = kzalloc(sizeof(*iotlb), GFP_KERNEL);
156 	if (!iotlb)
159 	vhost_iotlb_init(iotlb, limit, flags);
161 	return iotlb;
167  * @iotlb: the IOTLB to be reset
169 void vhost_iotlb_reset(struct vhost_iotlb *iotlb)
171 	vhost_iotlb_del_range(iotlb, 0ULL, 0ULL - 1);
177  * @iotlb: the IOTLB to be freed
179 void vhost_iotlb_free(struct vhost_iotlb *iotlb)
181 	if (iotlb) {
182 		vhost_iotlb_reset(iotlb);
183 		kfree(iotlb);
190  * @iotlb: the IOTLB
195 vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last)
197 	return vhost_iotlb_itree_iter_first(&iotlb->root, start, last);