95ea2efbd6
The struct mmu_rb_ops function pointers .insert, .invalidate were only used to increment and decrement struct sdma_mmu_node.refcount. With the deletion of struct sdma_mmu_node.refcount and the addition of struct mmu_rb_node.refcount these function pointers are not called and there are no implementations of them. So it is safe to delete these from struct mmu_rb_ops. Link: https://lore.kernel.org/r/168451526508.3702129.8677714753157495310.stgit@awfm-02.cornelisnetworks.com Signed-off-by: Brendan Cunningham <bcunningham@cornelisnetworks.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/* 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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/* filter and evict must not sleep. Only remove is allowed to sleep. */
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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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void (*remove)(void *ops_arg, struct mmu_rb_node *mnode);
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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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/*
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* struct mmu_notifier is 56 bytes, and spinlock_t is 4 bytes, so
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* they fit together in one cache line. mn is relatively rarely
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* accessed, so co-locating the spinlock with it achieves much of
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* the cacheline contention reduction of giving the spinlock its own
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* cacheline without the overhead of doing so.
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*/
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struct mmu_notifier mn;
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spinlock_t lock; /* protect the RB tree */
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/* Begin on a new cachline boundary here */
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struct rb_root_cached root ____cacheline_aligned_in_smp;
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void *ops_arg;
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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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void *free_ptr;
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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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