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- /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
- /*
- * Copyright(c) 2020 Cornelis Networks, Inc.
- * Copyright(c) 2016 Intel Corporation.
- */
- #ifndef _HFI1_MMU_RB_H
- #define _HFI1_MMU_RB_H
- #include "hfi.h"
- struct mmu_rb_node {
- unsigned long addr;
- unsigned long len;
- unsigned long __last;
- struct rb_node node;
- struct mmu_rb_handler *handler;
- struct list_head list;
- struct kref refcount;
- };
- /*
- * NOTE: filter, insert, invalidate, and evict must not sleep. Only remove is
- * allowed to sleep.
- */
- struct mmu_rb_ops {
- bool (*filter)(struct mmu_rb_node *node, unsigned long addr,
- unsigned long len);
- int (*insert)(void *ops_arg, struct mmu_rb_node *mnode);
- void (*remove)(void *ops_arg, struct mmu_rb_node *mnode);
- int (*invalidate)(void *ops_arg, struct mmu_rb_node *node);
- int (*evict)(void *ops_arg, struct mmu_rb_node *mnode,
- void *evict_arg, bool *stop);
- };
- struct mmu_rb_handler {
- struct mmu_notifier mn;
- struct rb_root_cached root;
- void *ops_arg;
- spinlock_t lock; /* protect the RB tree */
- struct mmu_rb_ops *ops;
- struct list_head lru_list;
- struct work_struct del_work;
- struct list_head del_list;
- struct workqueue_struct *wq;
- };
- int hfi1_mmu_rb_register(void *ops_arg,
- struct mmu_rb_ops *ops,
- struct workqueue_struct *wq,
- struct mmu_rb_handler **handler);
- void hfi1_mmu_rb_unregister(struct mmu_rb_handler *handler);
- int hfi1_mmu_rb_insert(struct mmu_rb_handler *handler,
- struct mmu_rb_node *mnode);
- void hfi1_mmu_rb_release(struct kref *refcount);
- void hfi1_mmu_rb_evict(struct mmu_rb_handler *handler, void *evict_arg);
- struct mmu_rb_node *hfi1_mmu_rb_get_first(struct mmu_rb_handler *handler,
- unsigned long addr,
- unsigned long len);
- #endif /* _HFI1_MMU_RB_H */
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