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102 lines
3.8 KiB
102 lines
3.8 KiB
/* |
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* Copyright(c) 2020 Cornelis Networks, Inc. |
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* Copyright(c) 2016 Intel Corporation. |
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* |
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* This file is provided under a dual BSD/GPLv2 license. When using or |
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* redistributing this file, you may do so under either license. |
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* |
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* GPL LICENSE SUMMARY |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of version 2 of the GNU General Public License as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* BSD LICENSE |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* - Neither the name of Intel Corporation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#ifndef _HFI1_MMU_RB_H |
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#define _HFI1_MMU_RB_H |
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#include "hfi.h" |
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struct mmu_rb_node { |
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unsigned long addr; |
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unsigned long len; |
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unsigned long __last; |
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struct rb_node node; |
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struct mmu_rb_handler *handler; |
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struct list_head list; |
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}; |
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/* |
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* NOTE: filter, insert, invalidate, and evict must not sleep. Only remove is |
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* allowed to sleep. |
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*/ |
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struct mmu_rb_ops { |
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bool (*filter)(struct mmu_rb_node *node, unsigned long addr, |
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unsigned long len); |
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int (*insert)(void *ops_arg, struct mmu_rb_node *mnode); |
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void (*remove)(void *ops_arg, struct mmu_rb_node *mnode); |
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int (*invalidate)(void *ops_arg, struct mmu_rb_node *node); |
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int (*evict)(void *ops_arg, struct mmu_rb_node *mnode, |
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void *evict_arg, bool *stop); |
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}; |
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struct mmu_rb_handler { |
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struct mmu_notifier mn; |
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struct rb_root_cached root; |
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void *ops_arg; |
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spinlock_t lock; /* protect the RB tree */ |
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struct mmu_rb_ops *ops; |
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struct list_head lru_list; |
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struct work_struct del_work; |
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struct list_head del_list; |
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struct workqueue_struct *wq; |
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}; |
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int hfi1_mmu_rb_register(void *ops_arg, |
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struct mmu_rb_ops *ops, |
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struct workqueue_struct *wq, |
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struct mmu_rb_handler **handler); |
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void hfi1_mmu_rb_unregister(struct mmu_rb_handler *handler); |
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int hfi1_mmu_rb_insert(struct mmu_rb_handler *handler, |
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struct mmu_rb_node *mnode); |
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void hfi1_mmu_rb_evict(struct mmu_rb_handler *handler, void *evict_arg); |
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void hfi1_mmu_rb_remove(struct mmu_rb_handler *handler, |
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struct mmu_rb_node *mnode); |
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bool hfi1_mmu_rb_remove_unless_exact(struct mmu_rb_handler *handler, |
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unsigned long addr, unsigned long len, |
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struct mmu_rb_node **rb_node); |
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#endif /* _HFI1_MMU_RB_H */
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