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- /**************************************************************************
- *
- * Copyright (c) 2006-2009 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>
- * Jerome Glisse
- */
- #include <linux/module.h>
- #include <linux/device.h>
- #include <linux/sched.h>
- #include <drm/ttm/ttm_module.h>
- #include <drm/drm_sysfs.h>
- static DECLARE_WAIT_QUEUE_HEAD(exit_q);
- static atomic_t device_released;
- static struct device_type ttm_drm_class_type = {
- .name = "ttm",
- /**
- * Add pm ops here.
- */
- };
- static void ttm_drm_class_device_release(struct device *dev)
- {
- atomic_set(&device_released, 1);
- wake_up_all(&exit_q);
- }
- static struct device ttm_drm_class_device = {
- .type = &ttm_drm_class_type,
- .release = &ttm_drm_class_device_release
- };
- struct kobject *ttm_get_kobj(void)
- {
- struct kobject *kobj = &ttm_drm_class_device.kobj;
- BUG_ON(kobj == NULL);
- return kobj;
- }
- static int __init ttm_init(void)
- {
- int ret;
- ret = dev_set_name(&ttm_drm_class_device, "ttm");
- if (unlikely(ret != 0))
- return ret;
- atomic_set(&device_released, 0);
- ret = drm_class_device_register(&ttm_drm_class_device);
- if (unlikely(ret != 0))
- goto out_no_dev_reg;
- return 0;
- out_no_dev_reg:
- atomic_set(&device_released, 1);
- wake_up_all(&exit_q);
- return ret;
- }
- static void __exit ttm_exit(void)
- {
- drm_class_device_unregister(&ttm_drm_class_device);
- /**
- * Refuse to unload until the TTM device is released.
- * Not sure this is 100% needed.
- */
- wait_event(exit_q, atomic_read(&device_released) == 1);
- }
- module_init(ttm_init);
- module_exit(ttm_exit);
- MODULE_AUTHOR("Thomas Hellstrom, Jerome Glisse");
- MODULE_DESCRIPTION("TTM memory manager subsystem (for DRM device)");
- MODULE_LICENSE("GPL and additional rights");
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