1/* 2 * Copyright(c) 2016 Intel Corporation. 3 * 4 * This file is provided under a dual BSD/GPLv2 license. When using or 5 * redistributing this file, you may do so under either license. 6 * 7 * GPL LICENSE SUMMARY 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * BSD LICENSE 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 24 * - Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * - Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in 28 * the documentation and/or other materials provided with the 29 * distribution. 30 * - Neither the name of Intel Corporation nor the names of its 31 * contributors may be used to endorse or promote products derived 32 * from this software without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45 * 46 */ 47#ifndef _HFI1_MMU_RB_H 48#define _HFI1_MMU_RB_H 49 50#include "hfi.h" 51 52struct mmu_rb_node { 53 unsigned long addr; 54 unsigned long len; 55 unsigned long __last; 56 struct rb_node node; 57 struct list_head list; 58}; 59 60/* 61 * NOTE: filter, insert, invalidate, and evict must not sleep. Only remove is 62 * allowed to sleep. 63 */ 64struct mmu_rb_ops { 65 bool (*filter)(struct mmu_rb_node *node, unsigned long addr, 66 unsigned long len); 67 int (*insert)(void *ops_arg, struct mmu_rb_node *mnode); 68 void (*remove)(void *ops_arg, struct mmu_rb_node *mnode); 69 int (*invalidate)(void *ops_arg, struct mmu_rb_node *node); 70 int (*evict)(void *ops_arg, struct mmu_rb_node *mnode, 71 void *evict_arg, bool *stop); 72}; 73 74int hfi1_mmu_rb_register(void *ops_arg, struct mm_struct *mm, 75 struct mmu_rb_ops *ops, 76 struct workqueue_struct *wq, 77 struct mmu_rb_handler **handler); 78void hfi1_mmu_rb_unregister(struct mmu_rb_handler *handler); 79int hfi1_mmu_rb_insert(struct mmu_rb_handler *handler, 80 struct mmu_rb_node *mnode); 81void hfi1_mmu_rb_evict(struct mmu_rb_handler *handler, void *evict_arg); 82void hfi1_mmu_rb_remove(struct mmu_rb_handler *handler, 83 struct mmu_rb_node *mnode); 84bool hfi1_mmu_rb_remove_unless_exact(struct mmu_rb_handler *handler, 85 unsigned long addr, unsigned long len, 86 struct mmu_rb_node **rb_node); 87 88#endif /* _HFI1_MMU_RB_H */ 89