+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0 OR MIT
-/**************************************************************************
- *
- * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA
- *
- * 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 <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <drm/drm_global.h>
-
-struct drm_global_item {
- struct mutex mutex;
- void *object;
- int refcount;
-};
-
-static struct drm_global_item glob[DRM_GLOBAL_NUM];
-
-void drm_global_init(void)
-{
- int i;
-
- for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
- struct drm_global_item *item = &glob[i];
- mutex_init(&item->mutex);
- item->object = NULL;
- item->refcount = 0;
- }
-}
-
-void drm_global_release(void)
-{
- int i;
- for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
- struct drm_global_item *item = &glob[i];
- BUG_ON(item->object != NULL);
- BUG_ON(item->refcount != 0);
- }
-}
-
-/**
- * drm_global_item_ref - Initialize and acquire reference to memory
- * object
- * @ref: Object for initialization
- *
- * This initializes a memory object, allocating memory and calling the
- * .init() hook. Further calls will increase the reference count for
- * that item.
- *
- * Returns:
- * Zero on success, non-zero otherwise.
- */
-int drm_global_item_ref(struct drm_global_reference *ref)
-{
- int ret = 0;
- struct drm_global_item *item = &glob[ref->global_type];
-
- mutex_lock(&item->mutex);
- if (item->refcount == 0) {
- ref->object = kzalloc(ref->size, GFP_KERNEL);
- if (unlikely(ref->object == NULL)) {
- ret = -ENOMEM;
- goto error_unlock;
- }
- ret = ref->init(ref);
- if (unlikely(ret != 0))
- goto error_free;
-
- item->object = ref->object;
- } else {
- ref->object = item->object;
- }
-
- ++item->refcount;
- mutex_unlock(&item->mutex);
- return 0;
-
-error_free:
- kfree(ref->object);
- ref->object = NULL;
-error_unlock:
- mutex_unlock(&item->mutex);
- return ret;
-}
-EXPORT_SYMBOL(drm_global_item_ref);
-
-/**
- * drm_global_item_unref - Drop reference to memory
- * object
- * @ref: Object being removed
- *
- * Drop a reference to the memory object and eventually call the
- * release() hook. The allocated object should be dropped in the
- * release() hook or before calling this function
- *
- */
-
-void drm_global_item_unref(struct drm_global_reference *ref)
-{
- struct drm_global_item *item = &glob[ref->global_type];
-
- mutex_lock(&item->mutex);
- BUG_ON(item->refcount == 0);
- BUG_ON(ref->object != item->object);
- if (--item->refcount == 0) {
- ref->release(ref);
- item->object = NULL;
- }
- mutex_unlock(&item->mutex);
-}
-EXPORT_SYMBOL(drm_global_item_unref);
-
+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2008-2009 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>
- */
-
-#ifndef _DRM_GLOBAL_H_
-#define _DRM_GLOBAL_H_
-enum drm_global_types {
- DRM_GLOBAL_TTM_MEM = 0,
- DRM_GLOBAL_TTM_BO,
- DRM_GLOBAL_TTM_OBJECT,
- DRM_GLOBAL_NUM
-};
-
-struct drm_global_reference {
- enum drm_global_types global_type;
- size_t size;
- void *object;
- int (*init) (struct drm_global_reference *);
- void (*release) (struct drm_global_reference *);
-};
-
-void drm_global_init(void);
-void drm_global_release(void);
-int drm_global_item_ref(struct drm_global_reference *ref);
-void drm_global_item_unref(struct drm_global_reference *ref);
-
-#endif
git.samba.org / sfrench / cifs-2.6.git / commitdiff