1 files changed, 0 insertions, 373 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
deleted file mode 100644
index 6558a3ed57a7..000000000000
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
+++ /dev/null
@@ -1,373 +0,0 @@
-/*
- * Copyright 2014 Advanced Micro Devices, Inc.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- */
-/*
- * Authors:
- *    Christian König <christian.koenig@amd.com>
- */
-
-#include <linux/firmware.h>
-#include <linux/module.h>
-#include <linux/mmu_notifier.h>
-#include <linux/interval_tree.h>
-#include <drm/drmP.h>
-#include <drm/drm.h>
-
-#include "amdgpu.h"
-
-struct amdgpu_mn {
-	/* constant after initialisation */
-	struct amdgpu_device	*adev;
-	struct mm_struct	*mm;
-	struct mmu_notifier	mn;
-
-	/* only used on destruction */
-	struct work_struct	work;
-
-	/* protected by adev->mn_lock */
-	struct hlist_node	node;
-
-	/* objects protected by lock */
-	struct mutex		lock;
-	struct rb_root		objects;
-};
-
-struct amdgpu_mn_node {
-	struct interval_tree_node	it;
-	struct list_head		bos;
-};
-
-/**
- * amdgpu_mn_destroy - destroy the rmn
- *
- * @work: previously sheduled work item
- *
- * Lazy destroys the notifier from a work item
- */
-static void amdgpu_mn_destroy(struct work_struct *work)
-{
-	struct amdgpu_mn *rmn = container_of(work, struct amdgpu_mn, work);
-	struct amdgpu_device *adev = rmn->adev;
-	struct amdgpu_mn_node *node, *next_node;
-	struct amdgpu_bo *bo, *next_bo;
-
-	mutex_lock(&adev->mn_lock);
-	mutex_lock(&rmn->lock);
-	hash_del(&rmn->node);
-	rbtree_postorder_for_each_entry_safe(node, next_node, &rmn->objects,
-					     it.rb) {
-		list_for_each_entry_safe(bo, next_bo, &node->bos, mn_list) {
-			bo->mn = NULL;
-			list_del_init(&bo->mn_list);
-		}
-		kfree(node);
-	}
-	mutex_unlock(&rmn->lock);
-	mutex_unlock(&adev->mn_lock);
-	mmu_notifier_unregister_no_release(&rmn->mn, rmn->mm);
-	kfree(rmn);
-}
-
-/**
- * amdgpu_mn_release - callback to notify about mm destruction
- *
- * @mn: our notifier
- * @mn: the mm this callback is about
- *
- * Shedule a work item to lazy destroy our notifier.
- */
-static void amdgpu_mn_release(struct mmu_notifier *mn,
-			      struct mm_struct *mm)
-{
-	struct amdgpu_mn *rmn = container_of(mn, struct amdgpu_mn, mn);
-	INIT_WORK(&rmn->work, amdgpu_mn_destroy);
-	schedule_work(&rmn->work);
-}
-
-/**
- * amdgpu_mn_invalidate_node - unmap all BOs of a node
- *
- * @node: the node with the BOs to unmap
- *
- * We block for all BOs and unmap them by move them
- * into system domain again.
- */
-static void amdgpu_mn_invalidate_node(struct amdgpu_mn_node *node,
-				      unsigned long start,
-				      unsigned long end)
-{
-	struct amdgpu_bo *bo;
-	long r;
-
-	list_for_each_entry(bo, &node->bos, mn_list) {
-
-		if (!amdgpu_ttm_tt_affect_userptr(bo->tbo.ttm, start, end))
-			continue;
-
-		r = amdgpu_bo_reserve(bo, true);
-		if (r) {
-			DRM_ERROR("(%ld) failed to reserve user bo\n", r);
-			continue;
-		}
-
-		r = reservation_object_wait_timeout_rcu(bo->tbo.resv,
-			true, false, MAX_SCHEDULE_TIMEOUT);
-		if (r <= 0)
-			DRM_ERROR("(%ld) failed to wait for user bo\n", r);
-
-		amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
-		r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
-		if (r)
-			DRM_ERROR("(%ld) failed to validate user bo\n", r);
-
-		amdgpu_bo_unreserve(bo);
-	}
-}
-
-/**
- * amdgpu_mn_invalidate_page - callback to notify about mm change
- *
- * @mn: our notifier
- * @mn: the mm this callback is about
- * @address: address of invalidate page
- *
- * Invalidation of a single page. Blocks for all BOs mapping it
- * and unmap them by move them into system domain again.
- */
-static void amdgpu_mn_invalidate_page(struct mmu_notifier *mn,
-				      struct mm_struct *mm,
-				      unsigned long address)
-{
-	struct amdgpu_mn *rmn = container_of(mn, struct amdgpu_mn, mn);
-	struct interval_tree_node *it;
-
-	mutex_lock(&rmn->lock);
-
-	it = interval_tree_iter_first(&rmn->objects, address, address);
-	if (it) {
-		struct amdgpu_mn_node *node;
-
-		node = container_of(it, struct amdgpu_mn_node, it);
-		amdgpu_mn_invalidate_node(node, address, address);
-	}
-
-	mutex_unlock(&rmn->lock);
-}
-
-/**
- * amdgpu_mn_invalidate_range_start - callback to notify about mm change
- *
- * @mn: our notifier
- * @mn: the mm this callback is about
- * @start: start of updated range
- * @end: end of updated range
- *
- * We block for all BOs between start and end to be idle and
- * unmap them by move them into system domain again.
- */
-static void amdgpu_mn_invalidate_range_start(struct mmu_notifier *mn,
-					     struct mm_struct *mm,
-					     unsigned long start,
-					     unsigned long end)
-{
-	struct amdgpu_mn *rmn = container_of(mn, struct amdgpu_mn, mn);
-	struct interval_tree_node *it;
-
-	/* notification is exclusive, but interval is inclusive */
-	end -= 1;
-
-	mutex_lock(&rmn->lock);
-
-	it = interval_tree_iter_first(&rmn->objects, start, end);
-	while (it) {
-		struct amdgpu_mn_node *node;
-
-		node = container_of(it, struct amdgpu_mn_node, it);
-		it = interval_tree_iter_next(it, start, end);
-
-		amdgpu_mn_invalidate_node(node, start, end);
-	}
-
-	mutex_unlock(&rmn->lock);
-}
-
-static const struct mmu_notifier_ops amdgpu_mn_ops = {
-	.release = amdgpu_mn_release,
-	.invalidate_page = amdgpu_mn_invalidate_page,
-	.invalidate_range_start = amdgpu_mn_invalidate_range_start,
-};
-
-/**
- * amdgpu_mn_get - create notifier context
- *
- * @adev: amdgpu device pointer
- *
- * Creates a notifier context for current->mm.
- */
-static struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev)
-{
-	struct mm_struct *mm = current->mm;
-	struct amdgpu_mn *rmn;
-	int r;
-
-	mutex_lock(&adev->mn_lock);
-	if (down_write_killable(&mm->mmap_sem)) {
-		mutex_unlock(&adev->mn_lock);
-		return ERR_PTR(-EINTR);
-	}
-
-	hash_for_each_possible(adev->mn_hash, rmn, node, (unsigned long)mm)
-		if (rmn->mm == mm)
-			goto release_locks;
-
-	rmn = kzalloc(sizeof(*rmn), GFP_KERNEL);
-	if (!rmn) {
-		rmn = ERR_PTR(-ENOMEM);
-		goto release_locks;
-	}
-
-	rmn->adev = adev;
-	rmn->mm = mm;
-	rmn->mn.ops = &amdgpu_mn_ops;
-	mutex_init(&rmn->lock);
-	rmn->objects = RB_ROOT;
-
-	r = __mmu_notifier_register(&rmn->mn, mm);
-	if (r)
-		goto free_rmn;
-
-	hash_add(adev->mn_hash, &rmn->node, (unsigned long)mm);
-
-release_locks:
-	up_write(&mm->mmap_sem);
-	mutex_unlock(&adev->mn_lock);
-
-	return rmn;
-
-free_rmn:
-	up_write(&mm->mmap_sem);
-	mutex_unlock(&adev->mn_lock);
-	kfree(rmn);
-
-	return ERR_PTR(r);
-}
-
-/**
- * amdgpu_mn_register - register a BO for notifier updates
- *
- * @bo: amdgpu buffer object
- * @addr: userptr addr we should monitor
- *
- * Registers an MMU notifier for the given BO at the specified address.
- * Returns 0 on success, -ERRNO if anything goes wrong.
- */
-int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr)
-{
-	unsigned long end = addr + amdgpu_bo_size(bo) - 1;
-	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-	struct amdgpu_mn *rmn;
-	struct amdgpu_mn_node *node = NULL;
-	struct list_head bos;
-	struct interval_tree_node *it;
-
-	rmn = amdgpu_mn_get(adev);
-	if (IS_ERR(rmn))
-		return PTR_ERR(rmn);
-
-	INIT_LIST_HEAD(&bos);
-
-	mutex_lock(&rmn->lock);
-
-	while ((it = interval_tree_iter_first(&rmn->objects, addr, end))) {
-		kfree(node);
-		node = container_of(it, struct amdgpu_mn_node, it);
-		interval_tree_remove(&node->it, &rmn->objects);
-		addr = min(it->start, addr);
-		end = max(it->last, end);
-		list_splice(&node->bos, &bos);
-	}
-
-	if (!node) {
-		node = kmalloc(sizeof(struct amdgpu_mn_node), GFP_KERNEL);
-		if (!node) {
-			mutex_unlock(&rmn->lock);
-			return -ENOMEM;
-		}
-	}
-
-	bo->mn = rmn;
-
-	node->it.start = addr;
-	node->it.last = end;
-	INIT_LIST_HEAD(&node->bos);
-	list_splice(&bos, &node->bos);
-	list_add(&bo->mn_list, &node->bos);
-
-	interval_tree_insert(&node->it, &rmn->objects);
-
-	mutex_unlock(&rmn->lock);
-
-	return 0;
-}
-
-/**
- * amdgpu_mn_unregister - unregister a BO for notifier updates
- *
- * @bo: amdgpu buffer object
- *
- * Remove any registration of MMU notifier updates from the buffer object.
- */
-void amdgpu_mn_unregister(struct amdgpu_bo *bo)
-{
-	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-	struct amdgpu_mn *rmn;
-	struct list_head *head;
-
-	mutex_lock(&adev->mn_lock);
-
-	rmn = bo->mn;
-	if (rmn == NULL) {
-		mutex_unlock(&adev->mn_lock);
-		return;
-	}
-
-	mutex_lock(&rmn->lock);
-
-	/* save the next list entry for later */
-	head = bo->mn_list.next;
-
-	bo->mn = NULL;
-	list_del_init(&bo->mn_list);
-
-	if (list_empty(head)) {
-		struct amdgpu_mn_node *node;
-		node = container_of(head, struct amdgpu_mn_node, bos);
-		interval_tree_remove(&node->it, &rmn->objects);
-		kfree(node);
-	}
-
-	mutex_unlock(&rmn->lock);
-	mutex_unlock(&adev->mn_lock);
-}