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Commit e9840be8 authored by Thomas Hellstrom's avatar Thomas Hellstrom Committed by Dave Airlie
Browse files

drm/ttm: Add a virtual ttm sysfs device. 



The device directory will be the base directory of the
sysfs representation of other ttm subsystems.

Signed-off-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
parent 327c225b

drivers/gpu/drm/ttm/ttm_module.c

+57 −1
Original line number Diff line number Diff line
@@ -29,16 +29,72 @@ 
 * 	    Jerome Glisse

 */

#include <linux/module.h>

#include <ttm/ttm_module.h>

#include <linux/device.h>

#include <linux/sched.h>

#include "ttm/ttm_module.h"

#include "drm_sysfs.h"



static DECLARE_WAIT_QUEUE_HEAD(exit_q);

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;



	ttm_global_init();



	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);

	ttm_global_release();

	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);

	ttm_global_release();

}