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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: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Thomas Hellstrom 2009-08-18 10:27:57 +02:00 committed by Dave Airlie
parent 327c225bd5
commit e9840be8c2
1 changed files with 57 additions and 1 deletions
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58
drivers/gpu/drm/ttm/ttm_module.c
View File

@ -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();
}