63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
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/*
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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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#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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struct kref refcount;
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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_release(struct kref *refcount);
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void hfi1_mmu_rb_evict(struct mmu_rb_handler *handler, void *evict_arg);
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struct mmu_rb_node *hfi1_mmu_rb_get_first(struct mmu_rb_handler *handler,
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unsigned long addr,
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unsigned long len);
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#endif /* _HFI1_MMU_RB_H */
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