1 files changed, 0 insertions, 302 deletions
diff --git a/drivers/staging/rdma/hfi1/mmu_rb.c b/drivers/staging/rdma/hfi1/mmu_rb.c
deleted file mode 100644
index b3f0682a3..000000000
--- a/drivers/staging/rdma/hfi1/mmu_rb.c
+++ /dev/null
@@ -1,302 +0,0 @@
-/*
- * Copyright(c) 2016 Intel Corporation.
- *
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * BSD LICENSE
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *  - Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  - Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *  - Neither the name of Intel Corporation nor the names of its
- *    contributors may be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-#include <linux/list.h>
-#include <linux/mmu_notifier.h>
-#include <linux/interval_tree_generic.h>
-
-#include "mmu_rb.h"
-#include "trace.h"
-
-struct mmu_rb_handler {
-	struct list_head list;
-	struct mmu_notifier mn;
-	struct rb_root *root;
-	spinlock_t lock;        /* protect the RB tree */
-	struct mmu_rb_ops *ops;
-};
-
-static LIST_HEAD(mmu_rb_handlers);
-static DEFINE_SPINLOCK(mmu_rb_lock); /* protect mmu_rb_handlers list */
-
-static unsigned long mmu_node_start(struct mmu_rb_node *);
-static unsigned long mmu_node_last(struct mmu_rb_node *);
-static struct mmu_rb_handler *find_mmu_handler(struct rb_root *);
-static inline void mmu_notifier_page(struct mmu_notifier *, struct mm_struct *,
-				     unsigned long);
-static inline void mmu_notifier_range_start(struct mmu_notifier *,
-					    struct mm_struct *,
-					    unsigned long, unsigned long);
-static void mmu_notifier_mem_invalidate(struct mmu_notifier *,
-					struct mm_struct *,
-					unsigned long, unsigned long);
-static struct mmu_rb_node *__mmu_rb_search(struct mmu_rb_handler *,
-					   unsigned long, unsigned long);
-
-static struct mmu_notifier_ops mn_opts = {
-	.invalidate_page = mmu_notifier_page,
-	.invalidate_range_start = mmu_notifier_range_start,
-};
-
-INTERVAL_TREE_DEFINE(struct mmu_rb_node, node, unsigned long, __last,
-		     mmu_node_start, mmu_node_last, static, __mmu_int_rb);
-
-static unsigned long mmu_node_start(struct mmu_rb_node *node)
-{
-	return node->addr & PAGE_MASK;
-}
-
-static unsigned long mmu_node_last(struct mmu_rb_node *node)
-{
-	return PAGE_ALIGN((node->addr & PAGE_MASK) + node->len) - 1;
-}
-
-int hfi1_mmu_rb_register(struct rb_root *root, struct mmu_rb_ops *ops)
-{
-	struct mmu_rb_handler *handlr;
-	unsigned long flags;
-
-	if (!ops->invalidate)
-		return -EINVAL;
-
-	handlr = kmalloc(sizeof(*handlr), GFP_KERNEL);
-	if (!handlr)
-		return -ENOMEM;
-
-	handlr->root = root;
-	handlr->ops = ops;
-	INIT_HLIST_NODE(&handlr->mn.hlist);
-	spin_lock_init(&handlr->lock);
-	handlr->mn.ops = &mn_opts;
-	spin_lock_irqsave(&mmu_rb_lock, flags);
-	list_add_tail(&handlr->list, &mmu_rb_handlers);
-	spin_unlock_irqrestore(&mmu_rb_lock, flags);
-
-	return mmu_notifier_register(&handlr->mn, current->mm);
-}
-
-void hfi1_mmu_rb_unregister(struct rb_root *root)
-{
-	struct mmu_rb_handler *handler = find_mmu_handler(root);
-	unsigned long flags;
-
-	if (!handler)
-		return;
-
-	spin_lock_irqsave(&mmu_rb_lock, flags);
-	list_del(&handler->list);
-	spin_unlock_irqrestore(&mmu_rb_lock, flags);
-
-	if (!RB_EMPTY_ROOT(root)) {
-		struct rb_node *node;
-		struct mmu_rb_node *rbnode;
-
-		while ((node = rb_first(root))) {
-			rbnode = rb_entry(node, struct mmu_rb_node, node);
-			rb_erase(node, root);
-			if (handler->ops->remove)
-				handler->ops->remove(root, rbnode, NULL);
-		}
-	}
-
-	if (current->mm)
-		mmu_notifier_unregister(&handler->mn, current->mm);
-	kfree(handler);
-}
-
-int hfi1_mmu_rb_insert(struct rb_root *root, struct mmu_rb_node *mnode)
-{
-	struct mmu_rb_handler *handler = find_mmu_handler(root);
-	struct mmu_rb_node *node;
-	unsigned long flags;
-	int ret = 0;
-
-	if (!handler)
-		return -EINVAL;
-
-	spin_lock_irqsave(&handler->lock, flags);
-	hfi1_cdbg(MMU, "Inserting node addr 0x%llx, len %u", mnode->addr,
-		  mnode->len);
-	node = __mmu_rb_search(handler, mnode->addr, mnode->len);
-	if (node) {
-		ret = -EINVAL;
-		goto unlock;
-	}
-	__mmu_int_rb_insert(mnode, root);
-
-	if (handler->ops->insert) {
-		ret = handler->ops->insert(root, mnode);
-		if (ret)
-			__mmu_int_rb_remove(mnode, root);
-	}
-unlock:
-	spin_unlock_irqrestore(&handler->lock, flags);
-	return ret;
-}
-
-/* Caller must hold handler lock */
-static struct mmu_rb_node *__mmu_rb_search(struct mmu_rb_handler *handler,
-					   unsigned long addr,
-					   unsigned long len)
-{
-	struct mmu_rb_node *node = NULL;
-
-	hfi1_cdbg(MMU, "Searching for addr 0x%llx, len %u", addr, len);
-	if (!handler->ops->filter) {
-		node = __mmu_int_rb_iter_first(handler->root, addr,
-					       (addr + len) - 1);
-	} else {
-		for (node = __mmu_int_rb_iter_first(handler->root, addr,
-						    (addr + len) - 1);
-		     node;
-		     node = __mmu_int_rb_iter_next(node, addr,
-						   (addr + len) - 1)) {
-			if (handler->ops->filter(node, addr, len))
-				return node;
-		}
-	}
-	return node;
-}
-
-/* Caller must *not* hold handler lock. */
-static void __mmu_rb_remove(struct mmu_rb_handler *handler,
-			    struct mmu_rb_node *node, struct mm_struct *mm)
-{
-	unsigned long flags;
-
-	/* Validity of handler and node pointers has been checked by caller. */
-	hfi1_cdbg(MMU, "Removing node addr 0x%llx, len %u", node->addr,
-		  node->len);
-	spin_lock_irqsave(&handler->lock, flags);
-	__mmu_int_rb_remove(node, handler->root);
-	spin_unlock_irqrestore(&handler->lock, flags);
-
-	if (handler->ops->remove)
-		handler->ops->remove(handler->root, node, mm);
-}
-
-struct mmu_rb_node *hfi1_mmu_rb_search(struct rb_root *root, unsigned long addr,
-				       unsigned long len)
-{
-	struct mmu_rb_handler *handler = find_mmu_handler(root);
-	struct mmu_rb_node *node;
-	unsigned long flags;
-
-	if (!handler)
-		return ERR_PTR(-EINVAL);
-
-	spin_lock_irqsave(&handler->lock, flags);
-	node = __mmu_rb_search(handler, addr, len);
-	spin_unlock_irqrestore(&handler->lock, flags);
-
-	return node;
-}
-
-void hfi1_mmu_rb_remove(struct rb_root *root, struct mmu_rb_node *node)
-{
-	struct mmu_rb_handler *handler = find_mmu_handler(root);
-
-	if (!handler || !node)
-		return;
-
-	__mmu_rb_remove(handler, node, NULL);
-}
-
-static struct mmu_rb_handler *find_mmu_handler(struct rb_root *root)
-{
-	struct mmu_rb_handler *handler;
-	unsigned long flags;
-
-	spin_lock_irqsave(&mmu_rb_lock, flags);
-	list_for_each_entry(handler, &mmu_rb_handlers, list) {
-		if (handler->root == root)
-			goto unlock;
-	}
-	handler = NULL;
-unlock:
-	spin_unlock_irqrestore(&mmu_rb_lock, flags);
-	return handler;
-}
-
-static inline void mmu_notifier_page(struct mmu_notifier *mn,
-				     struct mm_struct *mm, unsigned long addr)
-{
-	mmu_notifier_mem_invalidate(mn, mm, addr, addr + PAGE_SIZE);
-}
-
-static inline void mmu_notifier_range_start(struct mmu_notifier *mn,
-					    struct mm_struct *mm,
-					    unsigned long start,
-					    unsigned long end)
-{
-	mmu_notifier_mem_invalidate(mn, mm, start, end);
-}
-
-static void mmu_notifier_mem_invalidate(struct mmu_notifier *mn,
-					struct mm_struct *mm,
-					unsigned long start, unsigned long end)
-{
-	struct mmu_rb_handler *handler =
-		container_of(mn, struct mmu_rb_handler, mn);
-	struct rb_root *root = handler->root;
-	struct mmu_rb_node *node, *ptr = NULL;
-	unsigned long flags;
-
-	spin_lock_irqsave(&handler->lock, flags);
-	for (node = __mmu_int_rb_iter_first(root, start, end - 1);
-	     node; node = ptr) {
-		/* Guard against node removal. */
-		ptr = __mmu_int_rb_iter_next(node, start, end - 1);
-		hfi1_cdbg(MMU, "Invalidating node addr 0x%llx, len %u",
-			  node->addr, node->len);
-		if (handler->ops->invalidate(root, node)) {
-			spin_unlock_irqrestore(&handler->lock, flags);
-			__mmu_rb_remove(handler, node, mm);
-			spin_lock_irqsave(&handler->lock, flags);
-		}
-	}
-	spin_unlock_irqrestore(&handler->lock, flags);
-}