Merge branch 'core/urgent' into x86/urgent, to pick up objtool fix

Signed-off-by: Ingo Molnar <mingo@kernel.org>

7 files changed, 80 insertions, 1094 deletions

diff --git a/drivers/gpu/drm/ttm/Makefile b/drivers/gpu/drm/ttm/Makefile
index a60e560804e0..01fc670ce7a2 100644
--- a/drivers/gpu/drm/ttm/Makefile
+++ b/drivers/gpu/drm/ttm/Makefile
@@ -4,8 +4,8 @@
 
 ttm-y := ttm_memory.o ttm_tt.o ttm_bo.o \
 	ttm_bo_util.o ttm_bo_vm.o ttm_module.o \
-	ttm_object.o ttm_lock.o ttm_execbuf_util.o ttm_page_alloc.o \
-	ttm_bo_manager.o ttm_page_alloc_dma.o
+	ttm_execbuf_util.o ttm_page_alloc.o ttm_bo_manager.o \
+	ttm_page_alloc_dma.o
 ttm-$(CONFIG_AGP) += ttm_agp_backend.o
 
 obj-$(CONFIG_DRM_TTM) += ttm.o
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 7c484729f9b2..26b889f86670 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -214,15 +214,89 @@ void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
 }
 EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
 
-void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo)
+static void ttm_bo_bulk_move_set_pos(struct ttm_lru_bulk_move_pos *pos,
+				     struct ttm_buffer_object *bo)
+{
+	if (!pos->first)
+		pos->first = bo;
+	pos->last = bo;
+}
+
+void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
+			     struct ttm_lru_bulk_move *bulk)
 {
 	reservation_object_assert_held(bo->resv);
 
 	ttm_bo_del_from_lru(bo);
 	ttm_bo_add_to_lru(bo);
+
+	if (bulk && !(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
+		switch (bo->mem.mem_type) {
+		case TTM_PL_TT:
+			ttm_bo_bulk_move_set_pos(&bulk->tt[bo->priority], bo);
+			break;
+
+		case TTM_PL_VRAM:
+			ttm_bo_bulk_move_set_pos(&bulk->vram[bo->priority], bo);
+			break;
+		}
+		if (bo->ttm && !(bo->ttm->page_flags &
+				 (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED)))
+			ttm_bo_bulk_move_set_pos(&bulk->swap[bo->priority], bo);
+	}
 }
 EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
 
+void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk)
+{
+	unsigned i;
+
+	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
+		struct ttm_lru_bulk_move_pos *pos = &bulk->tt[i];
+		struct ttm_mem_type_manager *man;
+
+		if (!pos->first)
+			continue;
+
+		reservation_object_assert_held(pos->first->resv);
+		reservation_object_assert_held(pos->last->resv);
+
+		man = &pos->first->bdev->man[TTM_PL_TT];
+		list_bulk_move_tail(&man->lru[i], &pos->first->lru,
+				    &pos->last->lru);
+	}
+
+	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
+		struct ttm_lru_bulk_move_pos *pos = &bulk->vram[i];
+		struct ttm_mem_type_manager *man;
+
+		if (!pos->first)
+			continue;
+
+		reservation_object_assert_held(pos->first->resv);
+		reservation_object_assert_held(pos->last->resv);
+
+		man = &pos->first->bdev->man[TTM_PL_VRAM];
+		list_bulk_move_tail(&man->lru[i], &pos->first->lru,
+				    &pos->last->lru);
+	}
+
+	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
+		struct ttm_lru_bulk_move_pos *pos = &bulk->swap[i];
+		struct list_head *lru;
+
+		if (!pos->first)
+			continue;
+
+		reservation_object_assert_held(pos->first->resv);
+		reservation_object_assert_held(pos->last->resv);
+
+		lru = &pos->first->bdev->glob->swap_lru[i];
+		list_bulk_move_tail(lru, &pos->first->swap, &pos->last->swap);
+	}
+}
+EXPORT_SYMBOL(ttm_bo_bulk_move_lru_tail);
+
 static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
 				  struct ttm_mem_reg *mem, bool evict,
 				  struct ttm_operation_ctx *ctx)
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 046a6dda690a..ba80150d1052 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -629,10 +629,7 @@ int ttm_bo_kmap(struct ttm_buffer_object *bo,
 		return -EINVAL;
 	if (start_page > bo->num_pages)
 		return -EINVAL;
-#if 0
-	if (num_pages > 1 && !capable(CAP_SYS_ADMIN))
-		return -EPERM;
-#endif
+
 	(void) ttm_mem_io_lock(man, false);
 	ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
 	ttm_mem_io_unlock(man);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 6fe91c1b692d..a1d977fbade5 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -409,8 +409,7 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev,
 	node = drm_vma_offset_lookup_locked(&bdev->vma_manager, offset, pages);
 	if (likely(node)) {
 		bo = container_of(node, struct ttm_buffer_object, vma_node);
-		if (!kref_get_unless_zero(&bo->kref))
-			bo = NULL;
+		bo = ttm_bo_get_unless_zero(bo);
 	}
 
 	drm_vma_offset_unlock_lookup(&bdev->vma_manager);
diff --git a/drivers/gpu/drm/ttm/ttm_lock.c b/drivers/gpu/drm/ttm/ttm_lock.c
deleted file mode 100644
index 20694b8a01ca..000000000000
--- a/drivers/gpu/drm/ttm/ttm_lock.c
+++ /dev/null
@@ -1,303 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR MIT */
-/**************************************************************************
- *
- * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
- * 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 above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * 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.
- *
- **************************************************************************/
-/*
- * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
- */
-
-#include <drm/ttm/ttm_lock.h>
-#include <drm/ttm/ttm_module.h>
-#include <linux/atomic.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/sched/signal.h>
-#include <linux/module.h>
-
-#define TTM_WRITE_LOCK_PENDING    (1 << 0)
-#define TTM_VT_LOCK_PENDING       (1 << 1)
-#define TTM_SUSPEND_LOCK_PENDING  (1 << 2)
-#define TTM_VT_LOCK               (1 << 3)
-#define TTM_SUSPEND_LOCK          (1 << 4)
-
-void ttm_lock_init(struct ttm_lock *lock)
-{
-	spin_lock_init(&lock->lock);
-	init_waitqueue_head(&lock->queue);
-	lock->rw = 0;
-	lock->flags = 0;
-	lock->kill_takers = false;
-	lock->signal = SIGKILL;
-}
-EXPORT_SYMBOL(ttm_lock_init);
-
-void ttm_read_unlock(struct ttm_lock *lock)
-{
-	spin_lock(&lock->lock);
-	if (--lock->rw == 0)
-		wake_up_all(&lock->queue);
-	spin_unlock(&lock->lock);
-}
-EXPORT_SYMBOL(ttm_read_unlock);
-
-static bool __ttm_read_lock(struct ttm_lock *lock)
-{
-	bool locked = false;
-
-	spin_lock(&lock->lock);
-	if (unlikely(lock->kill_takers)) {
-		send_sig(lock->signal, current, 0);
-		spin_unlock(&lock->lock);
-		return false;
-	}
-	if (lock->rw >= 0 && lock->flags == 0) {
-		++lock->rw;
-		locked = true;
-	}
-	spin_unlock(&lock->lock);
-	return locked;
-}
-
-int ttm_read_lock(struct ttm_lock *lock, bool interruptible)
-{
-	int ret = 0;
-
-	if (interruptible)
-		ret = wait_event_interruptible(lock->queue,
-					       __ttm_read_lock(lock));
-	else
-		wait_event(lock->queue, __ttm_read_lock(lock));
-	return ret;
-}
-EXPORT_SYMBOL(ttm_read_lock);
-
-static bool __ttm_read_trylock(struct ttm_lock *lock, bool *locked)
-{
-	bool block = true;
-
-	*locked = false;
-
-	spin_lock(&lock->lock);
-	if (unlikely(lock->kill_takers)) {
-		send_sig(lock->signal, current, 0);
-		spin_unlock(&lock->lock);
-		return false;
-	}
-	if (lock->rw >= 0 && lock->flags == 0) {
-		++lock->rw;
-		block = false;
-		*locked = true;
-	} else if (lock->flags == 0) {
-		block = false;
-	}
-	spin_unlock(&lock->lock);
-
-	return !block;
-}
-
-int ttm_read_trylock(struct ttm_lock *lock, bool interruptible)
-{
-	int ret = 0;
-	bool locked;
-
-	if (interruptible)
-		ret = wait_event_interruptible
-			(lock->queue, __ttm_read_trylock(lock, &locked));
-	else
-		wait_event(lock->queue, __ttm_read_trylock(lock, &locked));
-
-	if (unlikely(ret != 0)) {
-		BUG_ON(locked);
-		return ret;
-	}
-
-	return (locked) ? 0 : -EBUSY;
-}
-
-void ttm_write_unlock(struct ttm_lock *lock)
-{
-	spin_lock(&lock->lock);
-	lock->rw = 0;
-	wake_up_all(&lock->queue);
-	spin_unlock(&lock->lock);
-}
-EXPORT_SYMBOL(ttm_write_unlock);
-
-static bool __ttm_write_lock(struct ttm_lock *lock)
-{
-	bool locked = false;
-
-	spin_lock(&lock->lock);
-	if (unlikely(lock->kill_takers)) {
-		send_sig(lock->signal, current, 0);
-		spin_unlock(&lock->lock);
-		return false;
-	}
-	if (lock->rw == 0 && ((lock->flags & ~TTM_WRITE_LOCK_PENDING) == 0)) {
-		lock->rw = -1;
-		lock->flags &= ~TTM_WRITE_LOCK_PENDING;
-		locked = true;
-	} else {
-		lock->flags |= TTM_WRITE_LOCK_PENDING;
-	}
-	spin_unlock(&lock->lock);
-	return locked;
-}
-
-int ttm_write_lock(struct ttm_lock *lock, bool interruptible)
-{
-	int ret = 0;
-
-	if (interruptible) {
-		ret = wait_event_interruptible(lock->queue,
-					       __ttm_write_lock(lock));
-		if (unlikely(ret != 0)) {
-			spin_lock(&lock->lock);
-			lock->flags &= ~TTM_WRITE_LOCK_PENDING;
-			wake_up_all(&lock->queue);
-			spin_unlock(&lock->lock);
-		}
-	} else
-		wait_event(lock->queue, __ttm_write_lock(lock));
-
-	return ret;
-}
-EXPORT_SYMBOL(ttm_write_lock);
-
-static int __ttm_vt_unlock(struct ttm_lock *lock)
-{
-	int ret = 0;
-
-	spin_lock(&lock->lock);
-	if (unlikely(!(lock->flags & TTM_VT_LOCK)))
-		ret = -EINVAL;
-	lock->flags &= ~TTM_VT_LOCK;
-	wake_up_all(&lock->queue);
-	spin_unlock(&lock->lock);
-
-	return ret;
-}
-
-static void ttm_vt_lock_remove(struct ttm_base_object **p_base)
-{
-	struct ttm_base_object *base = *p_base;
-	struct ttm_lock *lock = container_of(base, struct ttm_lock, base);
-	int ret;
-
-	*p_base = NULL;
-	ret = __ttm_vt_unlock(lock);
-	BUG_ON(ret != 0);
-}
-
-static bool __ttm_vt_lock(struct ttm_lock *lock)
-{
-	bool locked = false;
-
-	spin_lock(&lock->lock);
-	if (lock->rw == 0) {
-		lock->flags &= ~TTM_VT_LOCK_PENDING;
-		lock->flags |= TTM_VT_LOCK;
-		locked = true;
-	} else {
-		lock->flags |= TTM_VT_LOCK_PENDING;
-	}
-	spin_unlock(&lock->lock);
-	return locked;
-}
-
-int ttm_vt_lock(struct ttm_lock *lock,
-		bool interruptible,
-		struct ttm_object_file *tfile)
-{
-	int ret = 0;
-
-	if (interruptible) {
-		ret = wait_event_interruptible(lock->queue,
-					       __ttm_vt_lock(lock));
-		if (unlikely(ret != 0)) {
-			spin_lock(&lock->lock);
-			lock->flags &= ~TTM_VT_LOCK_PENDING;
-			wake_up_all(&lock->queue);
-			spin_unlock(&lock->lock);
-			return ret;
-		}
-	} else
-		wait_event(lock->queue, __ttm_vt_lock(lock));
-
-	/*
-	 * Add a base-object, the destructor of which will
-	 * make sure the lock is released if the client dies
-	 * while holding it.
-	 */
-
-	ret = ttm_base_object_init(tfile, &lock->base, false,
-				   ttm_lock_type, &ttm_vt_lock_remove, NULL);
-	if (ret)
-		(void)__ttm_vt_unlock(lock);
-	else
-		lock->vt_holder = tfile;
-
-	return ret;
-}
-EXPORT_SYMBOL(ttm_vt_lock);
-
-int ttm_vt_unlock(struct ttm_lock *lock)
-{
-	return ttm_ref_object_base_unref(lock->vt_holder,
-					 lock->base.hash.key, TTM_REF_USAGE);
-}
-EXPORT_SYMBOL(ttm_vt_unlock);
-
-void ttm_suspend_unlock(struct ttm_lock *lock)
-{
-	spin_lock(&lock->lock);
-	lock->flags &= ~TTM_SUSPEND_LOCK;
-	wake_up_all(&lock->queue);
-	spin_unlock(&lock->lock);
-}
-EXPORT_SYMBOL(ttm_suspend_unlock);
-
-static bool __ttm_suspend_lock(struct ttm_lock *lock)
-{
-	bool locked = false;
-
-	spin_lock(&lock->lock);
-	if (lock->rw == 0) {
-		lock->flags &= ~TTM_SUSPEND_LOCK_PENDING;
-		lock->flags |= TTM_SUSPEND_LOCK;
-		locked = true;
-	} else {
-		lock->flags |= TTM_SUSPEND_LOCK_PENDING;
-	}
-	spin_unlock(&lock->lock);
-	return locked;
-}
-
-void ttm_suspend_lock(struct ttm_lock *lock)
-{
-	wait_event(lock->queue, __ttm_suspend_lock(lock));
-}
-EXPORT_SYMBOL(ttm_suspend_lock);
diff --git a/drivers/gpu/drm/ttm/ttm_object.c b/drivers/gpu/drm/ttm/ttm_object.c
deleted file mode 100644
index 74f1b1eb1f8e..000000000000
--- a/drivers/gpu/drm/ttm/ttm_object.c
+++ /dev/null
@@ -1,775 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR MIT */
-/**************************************************************************
- *
- * Copyright (c) 2009-2013 VMware, Inc., Palo Alto, CA., USA
- * 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 above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * 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.
- *
- **************************************************************************/
-/*
- * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
- *
- * While no substantial code is shared, the prime code is inspired by
- * drm_prime.c, with
- * Authors:
- *      Dave Airlie <airlied@redhat.com>
- *      Rob Clark <rob.clark@linaro.org>
- */
-/** @file ttm_ref_object.c
- *
- * Base- and reference object implementation for the various
- * ttm objects. Implements reference counting, minimal security checks
- * and release on file close.
- */
-
-
-/**
- * struct ttm_object_file
- *
- * @tdev: Pointer to the ttm_object_device.
- *
- * @lock: Lock that protects the ref_list list and the
- * ref_hash hash tables.
- *
- * @ref_list: List of ttm_ref_objects to be destroyed at
- * file release.
- *
- * @ref_hash: Hash tables of ref objects, one per ttm_ref_type,
- * for fast lookup of ref objects given a base object.
- */
-
-#define pr_fmt(fmt) "[TTM] " fmt
-
-#include <drm/ttm/ttm_object.h>
-#include <drm/ttm/ttm_module.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/atomic.h>
-
-struct ttm_object_file {
-	struct ttm_object_device *tdev;
-	spinlock_t lock;
-	struct list_head ref_list;
-	struct drm_open_hash ref_hash[TTM_REF_NUM];
-	struct kref refcount;
-};
-
-/**
- * struct ttm_object_device
- *
- * @object_lock: lock that protects the object_hash hash table.
- *
- * @object_hash: hash table for fast lookup of object global names.
- *
- * @object_count: Per device object count.
- *
- * This is the per-device data structure needed for ttm object management.
- */
-
-struct ttm_object_device {
-	spinlock_t object_lock;
-	struct drm_open_hash object_hash;
-	atomic_t object_count;
-	struct ttm_mem_global *mem_glob;
-	struct dma_buf_ops ops;
-	void (*dmabuf_release)(struct dma_buf *dma_buf);
-	size_t dma_buf_size;
-};
-
-/**
- * struct ttm_ref_object
- *
- * @hash: Hash entry for the per-file object reference hash.
- *
- * @head: List entry for the per-file list of ref-objects.
- *
- * @kref: Ref count.
- *
- * @obj: Base object this ref object is referencing.
- *
- * @ref_type: Type of ref object.
- *
- * This is similar to an idr object, but it also has a hash table entry
- * that allows lookup with a pointer to the referenced object as a key. In
- * that way, one can easily detect whether a base object is referenced by
- * a particular ttm_object_file. It also carries a ref count to avoid creating
- * multiple ref objects if a ttm_object_file references the same base
- * object more than once.
- */
-
-struct ttm_ref_object {
-	struct rcu_head rcu_head;
-	struct drm_hash_item hash;
-	struct list_head head;
-	struct kref kref;
-	enum ttm_ref_type ref_type;
-	struct ttm_base_object *obj;
-	struct ttm_object_file *tfile;
-};
-
-static void ttm_prime_dmabuf_release(struct dma_buf *dma_buf);
-
-static inline struct ttm_object_file *
-ttm_object_file_ref(struct ttm_object_file *tfile)
-{
-	kref_get(&tfile->refcount);
-	return tfile;
-}
-
-static void ttm_object_file_destroy(struct kref *kref)
-{
-	struct ttm_object_file *tfile =
-		container_of(kref, struct ttm_object_file, refcount);
-
-	kfree(tfile);
-}
-
-
-static inline void ttm_object_file_unref(struct ttm_object_file **p_tfile)
-{
-	struct ttm_object_file *tfile = *p_tfile;
-
-	*p_tfile = NULL;
-	kref_put(&tfile->refcount, ttm_object_file_destroy);
-}
-
-
-int ttm_base_object_init(struct ttm_object_file *tfile,
-			 struct ttm_base_object *base,
-			 bool shareable,
-			 enum ttm_object_type object_type,
-			 void (*refcount_release) (struct ttm_base_object **),
-			 void (*ref_obj_release) (struct ttm_base_object *,
-						  enum ttm_ref_type ref_type))
-{
-	struct ttm_object_device *tdev = tfile->tdev;
-	int ret;
-
-	base->shareable = shareable;
-	base->tfile = ttm_object_file_ref(tfile);
-	base->refcount_release = refcount_release;
-	base->ref_obj_release = ref_obj_release;
-	base->object_type = object_type;
-	kref_init(&base->refcount);
-	spin_lock(&tdev->object_lock);
-	ret = drm_ht_just_insert_please_rcu(&tdev->object_hash,
-					    &base->hash,
-					    (unsigned long)base, 31, 0, 0);
-	spin_unlock(&tdev->object_lock);
-	if (unlikely(ret != 0))
-		goto out_err0;
-
-	ret = ttm_ref_object_add(tfile, base, TTM_REF_USAGE, NULL, false);
-	if (unlikely(ret != 0))
-		goto out_err1;
-
-	ttm_base_object_unref(&base);
-
-	return 0;
-out_err1:
-	spin_lock(&tdev->object_lock);
-	(void)drm_ht_remove_item_rcu(&tdev->object_hash, &base->hash);
-	spin_unlock(&tdev->object_lock);
-out_err0:
-	return ret;
-}
-EXPORT_SYMBOL(ttm_base_object_init);
-
-static void ttm_release_base(struct kref *kref)
-{
-	struct ttm_base_object *base =
-	    container_of(kref, struct ttm_base_object, refcount);
-	struct ttm_object_device *tdev = base->tfile->tdev;
-
-	spin_lock(&tdev->object_lock);
-	(void)drm_ht_remove_item_rcu(&tdev->object_hash, &base->hash);
-	spin_unlock(&tdev->object_lock);
-
-	/*
-	 * Note: We don't use synchronize_rcu() here because it's far
-	 * too slow. It's up to the user to free the object using
-	 * call_rcu() or ttm_base_object_kfree().
-	 */
-
-	ttm_object_file_unref(&base->tfile);
-	if (base->refcount_release)
-		base->refcount_release(&base);
-}
-
-void ttm_base_object_unref(struct ttm_base_object **p_base)
-{
-	struct ttm_base_object *base = *p_base;
-
-	*p_base = NULL;
-
-	kref_put(&base->refcount, ttm_release_base);
-}
-EXPORT_SYMBOL(ttm_base_object_unref);
-
-struct ttm_base_object *ttm_base_object_lookup(struct ttm_object_file *tfile,
-					       uint32_t key)
-{
-	struct ttm_base_object *base = NULL;
-	struct drm_hash_item *hash;
-	struct drm_open_hash *ht = &tfile->ref_hash[TTM_REF_USAGE];
-	int ret;
-
-	rcu_read_lock();
-	ret = drm_ht_find_item_rcu(ht, key, &hash);
-
-	if (likely(ret == 0)) {
-		base = drm_hash_entry(hash, struct ttm_ref_object, hash)->obj;
-		if (!kref_get_unless_zero(&base->refcount))
-			base = NULL;
-	}
-	rcu_read_unlock();
-
-	return base;
-}
-EXPORT_SYMBOL(ttm_base_object_lookup);
-
-struct ttm_base_object *
-ttm_base_object_lookup_for_ref(struct ttm_object_device *tdev, uint32_t key)
-{
-	struct ttm_base_object *base = NULL;
-	struct drm_hash_item *hash;
-	struct drm_open_hash *ht = &tdev->object_hash;
-	int ret;
-
-	rcu_read_lock();
-	ret = drm_ht_find_item_rcu(ht, key, &hash);
-
-	if (likely(ret == 0)) {
-		base = drm_hash_entry(hash, struct ttm_base_object, hash);
-		if (!kref_get_unless_zero(&base->refcount))
-			base = NULL;
-	}
-	rcu_read_unlock();
-
-	return base;
-}
-EXPORT_SYMBOL(ttm_base_object_lookup_for_ref);
-
-/**
- * ttm_ref_object_exists - Check whether a caller has a valid ref object
- * (has opened) a base object.
- *
- * @tfile: Pointer to a struct ttm_object_file identifying the caller.
- * @base: Pointer to a struct base object.
- *
- * Checks wether the caller identified by @tfile has put a valid USAGE
- * reference object on the base object identified by @base.
- */
-bool ttm_ref_object_exists(struct ttm_object_file *tfile,
-			   struct ttm_base_object *base)
-{
-	struct drm_open_hash *ht = &tfile->ref_hash[TTM_REF_USAGE];
-	struct drm_hash_item *hash;
-	struct ttm_ref_object *ref;
-
-	rcu_read_lock();
-	if (unlikely(drm_ht_find_item_rcu(ht, base->hash.key, &hash) != 0))
-		goto out_false;
-
-	/*
-	 * Verify that the ref object is really pointing to our base object.
-	 * Our base object could actually be dead, and the ref object pointing
-	 * to another base object with the same handle.
-	 */
-	ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
-	if (unlikely(base != ref->obj))
-		goto out_false;
-
-	/*
-	 * Verify that the ref->obj pointer was actually valid!
-	 */
-	rmb();
-	if (unlikely(kref_read(&ref->kref) == 0))
-		goto out_false;
-
-	rcu_read_unlock();
-	return true;
-
- out_false:
-	rcu_read_unlock();
-	return false;
-}
-EXPORT_SYMBOL(ttm_ref_object_exists);
-
-int ttm_ref_object_add(struct ttm_object_file *tfile,
-		       struct ttm_base_object *base,
-		       enum ttm_ref_type ref_type, bool *existed,
-		       bool require_existed)
-{
-	struct drm_open_hash *ht = &tfile->ref_hash[ref_type];
-	struct ttm_ref_object *ref;
-	struct drm_hash_item *hash;
-	struct ttm_mem_global *mem_glob = tfile->tdev->mem_glob;
-	struct ttm_operation_ctx ctx = {
-		.interruptible = false,
-		.no_wait_gpu = false
-	};
-	int ret = -EINVAL;
-
-	if (base->tfile != tfile && !base->shareable)
-		return -EPERM;
-
-	if (existed != NULL)
-		*existed = true;
-
-	while (ret == -EINVAL) {
-		rcu_read_lock();
-		ret = drm_ht_find_item_rcu(ht, base->hash.key, &hash);
-
-		if (ret == 0) {
-			ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
-			if (kref_get_unless_zero(&ref->kref)) {
-				rcu_read_unlock();
-				break;
-			}
-		}
-
-		rcu_read_unlock();
-		if (require_existed)
-			return -EPERM;
-
-		ret = ttm_mem_global_alloc(mem_glob, sizeof(*ref),
-					   &ctx);
-		if (unlikely(ret != 0))
-			return ret;
-		ref = kmalloc(sizeof(*ref), GFP_KERNEL);
-		if (unlikely(ref == NULL)) {
-			ttm_mem_global_free(mem_glob, sizeof(*ref));
-			return -ENOMEM;
-		}
-
-		ref->hash.key = base->hash.key;
-		ref->obj = base;
-		ref->tfile = tfile;
-		ref->ref_type = ref_type;
-		kref_init(&ref->kref);
-
-		spin_lock(&tfile->lock);
-		ret = drm_ht_insert_item_rcu(ht, &ref->hash);
-
-		if (likely(ret == 0)) {
-			list_add_tail(&ref->head, &tfile->ref_list);
-			kref_get(&base->refcount);
-			spin_unlock(&tfile->lock);
-			if (existed != NULL)
-				*existed = false;
-			break;
-		}
-
-		spin_unlock(&tfile->lock);
-		BUG_ON(ret != -EINVAL);
-
-		ttm_mem_global_free(mem_glob, sizeof(*ref));
-		kfree(ref);
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL(ttm_ref_object_add);
-
-static void ttm_ref_object_release(struct kref *kref)
-{
-	struct ttm_ref_object *ref =
-	    container_of(kref, struct ttm_ref_object, kref);
-	struct ttm_base_object *base = ref->obj;
-	struct ttm_object_file *tfile = ref->tfile;
-	struct drm_open_hash *ht;
-	struct ttm_mem_global *mem_glob = tfile->tdev->mem_glob;
-
-	ht = &tfile->ref_hash[ref->ref_type];
-	(void)drm_ht_remove_item_rcu(ht, &ref->hash);
-	list_del(&ref->head);
-	spin_unlock(&tfile->lock);
-
-	if (ref->ref_type != TTM_REF_USAGE && base->ref_obj_release)
-		base->ref_obj_release(base, ref->ref_type);
-
-	ttm_base_object_unref(&ref->obj);
-	ttm_mem_global_free(mem_glob, sizeof(*ref));
-	kfree_rcu(ref, rcu_head);
-	spin_lock(&tfile->lock);
-}
-
-int ttm_ref_object_base_unref(struct ttm_object_file *tfile,
-			      unsigned long key, enum ttm_ref_type ref_type)
-{
-	struct drm_open_hash *ht = &tfile->ref_hash[ref_type];
-	struct ttm_ref_object *ref;
-	struct drm_hash_item *hash;
-	int ret;
-
-	spin_lock(&tfile->lock);
-	ret = drm_ht_find_item(ht, key, &hash);
-	if (unlikely(ret != 0)) {
-		spin_unlock(&tfile->lock);
-		return -EINVAL;
-	}
-	ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
-	kref_put(&ref->kref, ttm_ref_object_release);
-	spin_unlock(&tfile->lock);
-	return 0;
-}
-EXPORT_SYMBOL(ttm_ref_object_base_unref);
-
-void ttm_object_file_release(struct ttm_object_file **p_tfile)
-{
-	struct ttm_ref_object *ref;
-	struct list_head *list;
-	unsigned int i;
-	struct ttm_object_file *tfile = *p_tfile;
-
-	*p_tfile = NULL;
-	spin_lock(&tfile->lock);
-
-	/*
-	 * Since we release the lock within the loop, we have to
-	 * restart it from the beginning each time.
-	 */
-
-	while (!list_empty(&tfile->ref_list)) {
-		list = tfile->ref_list.next;
-		ref = list_entry(list, struct ttm_ref_object, head);
-		ttm_ref_object_release(&ref->kref);
-	}
-
-	spin_unlock(&tfile->lock);
-	for (i = 0; i < TTM_REF_NUM; ++i)
-		drm_ht_remove(&tfile->ref_hash[i]);
-
-	ttm_object_file_unref(&tfile);
-}
-EXPORT_SYMBOL(ttm_object_file_release);
-
-struct ttm_object_file *ttm_object_file_init(struct ttm_object_device *tdev,
-					     unsigned int hash_order)
-{
-	struct ttm_object_file *tfile = kmalloc(sizeof(*tfile), GFP_KERNEL);
-	unsigned int i;
-	unsigned int j = 0;
-	int ret;
-
-	if (unlikely(tfile == NULL))
-		return NULL;
-
-	spin_lock_init(&tfile->lock);
-	tfile->tdev = tdev;
-	kref_init(&tfile->refcount);
-	INIT_LIST_HEAD(&tfile->ref_list);
-
-	for (i = 0; i < TTM_REF_NUM; ++i) {
-		ret = drm_ht_create(&tfile->ref_hash[i], hash_order);
-		if (ret) {
-			j = i;
-			goto out_err;
-		}
-	}
-
-	return tfile;
-out_err:
-	for (i = 0; i < j; ++i)
-		drm_ht_remove(&tfile->ref_hash[i]);
-
-	kfree(tfile);
-
-	return NULL;
-}
-EXPORT_SYMBOL(ttm_object_file_init);
-
-struct ttm_object_device *
-ttm_object_device_init(struct ttm_mem_global *mem_glob,
-		       unsigned int hash_order,
-		       const struct dma_buf_ops *ops)
-{
-	struct ttm_object_device *tdev = kmalloc(sizeof(*tdev), GFP_KERNEL);
-	int ret;
-
-	if (unlikely(tdev == NULL))
-		return NULL;
-
-	tdev->mem_glob = mem_glob;
-	spin_lock_init(&tdev->object_lock);
-	atomic_set(&tdev->object_count, 0);
-	ret = drm_ht_create(&tdev->object_hash, hash_order);
-	if (ret != 0)
-		goto out_no_object_hash;
-
-	tdev->ops = *ops;
-	tdev->dmabuf_release = tdev->ops.release;
-	tdev->ops.release = ttm_prime_dmabuf_release;
-	tdev->dma_buf_size = ttm_round_pot(sizeof(struct dma_buf)) +
-		ttm_round_pot(sizeof(struct file));
-	return tdev;
-
-out_no_object_hash:
-	kfree(tdev);
-	return NULL;
-}
-EXPORT_SYMBOL(ttm_object_device_init);
-
-void ttm_object_device_release(struct ttm_object_device **p_tdev)
-{
-	struct ttm_object_device *tdev = *p_tdev;
-
-	*p_tdev = NULL;
-
-	drm_ht_remove(&tdev->object_hash);
-
-	kfree(tdev);
-}
-EXPORT_SYMBOL(ttm_object_device_release);
-
-/**
- * get_dma_buf_unless_doomed - get a dma_buf reference if possible.
- *
- * @dma_buf: Non-refcounted pointer to a struct dma-buf.
- *
- * Obtain a file reference from a lookup structure that doesn't refcount
- * the file, but synchronizes with its release method to make sure it has
- * not been freed yet. See for example kref_get_unless_zero documentation.
- * Returns true if refcounting succeeds, false otherwise.
- *
- * Nobody really wants this as a public API yet, so let it mature here
- * for some time...
- */
-static bool __must_check get_dma_buf_unless_doomed(struct dma_buf *dmabuf)
-{
-	return atomic_long_inc_not_zero(&dmabuf->file->f_count) != 0L;
-}
-
-/**
- * ttm_prime_refcount_release - refcount release method for a prime object.
- *
- * @p_base: Pointer to ttm_base_object pointer.
- *
- * This is a wrapper that calls the refcount_release founction of the
- * underlying object. At the same time it cleans up the prime object.
- * This function is called when all references to the base object we
- * derive from are gone.
- */
-static void ttm_prime_refcount_release(struct ttm_base_object **p_base)
-{
-	struct ttm_base_object *base = *p_base;
-	struct ttm_prime_object *prime;
-
-	*p_base = NULL;
-	prime = container_of(base, struct ttm_prime_object, base);
-	BUG_ON(prime->dma_buf != NULL);
-	mutex_destroy(&prime->mutex);
-	if (prime->refcount_release)
-		prime->refcount_release(&base);
-}
-
-/**
- * ttm_prime_dmabuf_release - Release method for the dma-bufs we export
- *
- * @dma_buf:
- *
- * This function first calls the dma_buf release method the driver
- * provides. Then it cleans up our dma_buf pointer used for lookup,
- * and finally releases the reference the dma_buf has on our base
- * object.
- */
-static void ttm_prime_dmabuf_release(struct dma_buf *dma_buf)
-{
-	struct ttm_prime_object *prime =
-		(struct ttm_prime_object *) dma_buf->priv;
-	struct ttm_base_object *base = &prime->base;
-	struct ttm_object_device *tdev = base->tfile->tdev;
-
-	if (tdev->dmabuf_release)
-		tdev->dmabuf_release(dma_buf);
-	mutex_lock(&prime->mutex);
-	if (prime->dma_buf == dma_buf)
-		prime->dma_buf = NULL;
-	mutex_unlock(&prime->mutex);
-	ttm_mem_global_free(tdev->mem_glob, tdev->dma_buf_size);
-	ttm_base_object_unref(&base);
-}
-
-/**
- * ttm_prime_fd_to_handle - Get a base object handle from a prime fd
- *
- * @tfile: A struct ttm_object_file identifying the caller.
- * @fd: The prime / dmabuf fd.
- * @handle: The returned handle.
- *
- * This function returns a handle to an object that previously exported
- * a dma-buf. Note that we don't handle imports yet, because we simply
- * have no consumers of that implementation.
- */
-int ttm_prime_fd_to_handle(struct ttm_object_file *tfile,
-			   int fd, u32 *handle)
-{
-	struct ttm_object_device *tdev = tfile->tdev;
-	struct dma_buf *dma_buf;
-	struct ttm_prime_object *prime;
-	struct ttm_base_object *base;
-	int ret;
-
-	dma_buf = dma_buf_get(fd);
-	if (IS_ERR(dma_buf))
-		return PTR_ERR(dma_buf);
-
-	if (dma_buf->ops != &tdev->ops)
-		return -ENOSYS;
-
-	prime = (struct ttm_prime_object *) dma_buf->priv;
-	base = &prime->base;
-	*handle = base->hash.key;
-	ret = ttm_ref_object_add(tfile, base, TTM_REF_USAGE, NULL, false);
-
-	dma_buf_put(dma_buf);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(ttm_prime_fd_to_handle);
-
-/**
- * ttm_prime_handle_to_fd - Return a dma_buf fd from a ttm prime object
- *
- * @tfile: Struct ttm_object_file identifying the caller.
- * @handle: Handle to the object we're exporting from.
- * @flags: flags for dma-buf creation. We just pass them on.
- * @prime_fd: The returned file descriptor.
- *
- */
-int ttm_prime_handle_to_fd(struct ttm_object_file *tfile,
-			   uint32_t handle, uint32_t flags,
-			   int *prime_fd)
-{
-	struct ttm_object_device *tdev = tfile->tdev;
-	struct ttm_base_object *base;
-	struct dma_buf *dma_buf;
-	struct ttm_prime_object *prime;
-	int ret;
-
-	base = ttm_base_object_lookup(tfile, handle);
-	if (unlikely(base == NULL ||
-		     base->object_type != ttm_prime_type)) {
-		ret = -ENOENT;
-		goto out_unref;
-	}
-
-	prime = container_of(base, struct ttm_prime_object, base);
-	if (unlikely(!base->shareable)) {
-		ret = -EPERM;
-		goto out_unref;
-	}
-
-	ret = mutex_lock_interruptible(&prime->mutex);
-	if (unlikely(ret != 0)) {
-		ret = -ERESTARTSYS;
-		goto out_unref;
-	}
-
-	dma_buf = prime->dma_buf;
-	if (!dma_buf || !get_dma_buf_unless_doomed(dma_buf)) {
-		DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
-		struct ttm_operation_ctx ctx = {
-			.interruptible = true,
-			.no_wait_gpu = false
-		};
-		exp_info.ops = &tdev->ops;
-		exp_info.size = prime->size;
-		exp_info.flags = flags;
-		exp_info.priv = prime;
-
-		/*
-		 * Need to create a new dma_buf, with memory accounting.
-		 */
-		ret = ttm_mem_global_alloc(tdev->mem_glob, tdev->dma_buf_size,
-					   &ctx);
-		if (unlikely(ret != 0)) {
-			mutex_unlock(&prime->mutex);
-			goto out_unref;
-		}
-
-		dma_buf = dma_buf_export(&exp_info);
-		if (IS_ERR(dma_buf)) {
-			ret = PTR_ERR(dma_buf);
-			ttm_mem_global_free(tdev->mem_glob,
-					    tdev->dma_buf_size);
-			mutex_unlock(&prime->mutex);
-			goto out_unref;
-		}
-
-		/*
-		 * dma_buf has taken the base object reference
-		 */
-		base = NULL;
-		prime->dma_buf = dma_buf;
-	}
-	mutex_unlock(&prime->mutex);
-
-	ret = dma_buf_fd(dma_buf, flags);
-	if (ret >= 0) {
-		*prime_fd = ret;
-		ret = 0;
-	} else
-		dma_buf_put(dma_buf);
-
-out_unref:
-	if (base)
-		ttm_base_object_unref(&base);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(ttm_prime_handle_to_fd);
-
-/**
- * ttm_prime_object_init - Initialize a ttm_prime_object
- *
- * @tfile: struct ttm_object_file identifying the caller
- * @size: The size of the dma_bufs we export.
- * @prime: The object to be initialized.
- * @shareable: See ttm_base_object_init
- * @type: See ttm_base_object_init
- * @refcount_release: See ttm_base_object_init
- * @ref_obj_release: See ttm_base_object_init
- *
- * Initializes an object which is compatible with the drm_prime model
- * for data sharing between processes and devices.
- */
-int ttm_prime_object_init(struct ttm_object_file *tfile, size_t size,
-			  struct ttm_prime_object *prime, bool shareable,
-			  enum ttm_object_type type,
-			  void (*refcount_release) (struct ttm_base_object **),
-			  void (*ref_obj_release) (struct ttm_base_object *,
-						   enum ttm_ref_type ref_type))
-{
-	mutex_init(&prime->mutex);
-	prime->size = PAGE_ALIGN(size);
-	prime->real_type = type;
-	prime->dma_buf = NULL;
-	prime->refcount_release = refcount_release;
-	return ttm_base_object_init(tfile, &prime->base, shareable,
-				    ttm_prime_type,
-				    ttm_prime_refcount_release,
-				    ref_obj_release);
-}
-EXPORT_SYMBOL(ttm_prime_object_init);
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
index 507be7ac1165..d594f7520b7b 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -410,13 +410,7 @@ static unsigned ttm_dma_page_pool_free(struct dma_pool *pool, unsigned nr_free,
 
 	if (NUM_PAGES_TO_ALLOC < nr_free)
 		npages_to_free = NUM_PAGES_TO_ALLOC;
-#if 0
-	if (nr_free > 1) {
-		pr_debug("%s: (%s:%d) Attempting to free %d (%d) pages\n",
-			 pool->dev_name, pool->name, current->pid,
-			 npages_to_free, nr_free);
-	}
-#endif
+
 	if (use_static)
 		pages_to_free = static_buf;
 	else