1 files changed, 0 insertions, 454 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_object.c b/drivers/gpu/drm/ttm/ttm_object.c
deleted file mode 100644
index 58a5f3261c0b..000000000000
--- a/drivers/gpu/drm/ttm/ttm_object.c
+++ /dev/null
@@ -1,454 +0,0 @@
-/**************************************************************************
- *
- * Copyright (c) 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>
- */
-/** @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;
-	rwlock_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 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 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 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);
-	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().
-	 */
-
-	if (base->refcount_release) {
-		ttm_object_file_unref(&base->tfile);
-		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_object_device *tdev = tfile->tdev;
-	struct ttm_base_object *base;
-	struct drm_hash_item *hash;
-	int ret;
-
-	rcu_read_lock();
-	ret = drm_ht_find_item_rcu(&tdev->object_hash, key, &hash);
-
-	if (likely(ret == 0)) {
-		base = drm_hash_entry(hash, struct ttm_base_object, hash);
-		ret = kref_get_unless_zero(&base->refcount) ? 0 : -EINVAL;
-	}
-	rcu_read_unlock();
-
-	if (unlikely(ret != 0))
-		return NULL;
-
-	if (tfile != base->tfile && !base->shareable) {
-		pr_err("Attempted access of non-shareable object\n");
-		ttm_base_object_unref(&base);
-		return NULL;
-	}
-
-	return base;
-}
-EXPORT_SYMBOL(ttm_base_object_lookup);
-
-int ttm_ref_object_add(struct ttm_object_file *tfile,
-		       struct ttm_base_object *base,
-		       enum ttm_ref_type ref_type, bool *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;
-	int ret = -EINVAL;
-
-	if (existed != NULL)
-		*existed = true;
-
-	while (ret == -EINVAL) {
-		read_lock(&tfile->lock);
-		ret = drm_ht_find_item(ht, base->hash.key, &hash);
-
-		if (ret == 0) {
-			ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
-			kref_get(&ref->kref);
-			read_unlock(&tfile->lock);
-			break;
-		}
-
-		read_unlock(&tfile->lock);
-		ret = ttm_mem_global_alloc(mem_glob, sizeof(*ref),
-					   false, false);
-		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);
-
-		write_lock(&tfile->lock);
-		ret = drm_ht_insert_item(ht, &ref->hash);
-
-		if (likely(ret == 0)) {
-			list_add_tail(&ref->head, &tfile->ref_list);
-			kref_get(&base->refcount);
-			write_unlock(&tfile->lock);
-			if (existed != NULL)
-				*existed = false;
-			break;
-		}
-
-		write_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(ht, &ref->hash);
-	list_del(&ref->head);
-	write_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(ref);
-	write_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;
-
-	write_lock(&tfile->lock);
-	ret = drm_ht_find_item(ht, key, &hash);
-	if (unlikely(ret != 0)) {
-		write_unlock(&tfile->lock);
-		return -EINVAL;
-	}
-	ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
-	kref_put(&ref->kref, ttm_ref_object_release);
-	write_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;
-	write_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);
-	}
-
-	for (i = 0; i < TTM_REF_NUM; ++i)
-		drm_ht_remove(&tfile->ref_hash[i]);
-
-	write_unlock(&tfile->lock);
-	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;
-
-	rwlock_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)
-{
-	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 (likely(ret == 0))
-		return tdev;
-
-	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;
-
-	spin_lock(&tdev->object_lock);
-	drm_ht_remove(&tdev->object_hash);
-	spin_unlock(&tdev->object_lock);
-
-	kfree(tdev);
-}
-EXPORT_SYMBOL(ttm_object_device_release);