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path: root/drivers/gpu/drm/ttm/ttm_module.c
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Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_module.c')
-rw-r--r--drivers/gpu/drm/ttm/ttm_module.c58
1 files changed, 57 insertions, 1 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_module.c b/drivers/gpu/drm/ttm/ttm_module.c
index 59ce8191d58..9a6edbfeaa9 100644
--- a/drivers/gpu/drm/ttm/ttm_module.c
+++ b/drivers/gpu/drm/ttm/ttm_module.c
@@ -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();
}