103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
|
/**************************************************************************
|
||
|
|
*
|
||
|
|
* 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");
|