41 static int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context);
177 int drm_lock_take(struct drm_lock_data *lock_data,  in drm_lock_take()  argument
181 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_lock_take()
183 	spin_lock_bh(&lock_data->spinlock);  in drm_lock_take()
190 				((lock_data->user_waiters + lock_data->kernel_waiters > 1) ?  in drm_lock_take()
195 	spin_unlock_bh(&lock_data->spinlock);  in drm_lock_take()
226 static int drm_lock_transfer(struct drm_lock_data *lock_data,  in drm_lock_transfer()  argument
230 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_lock_transfer()
232 	lock_data->file_priv = NULL;  in drm_lock_transfer()
252 int drm_legacy_lock_free(struct drm_lock_data *lock_data, unsigned int context)  in drm_legacy_lock_free()  argument
255 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_legacy_lock_free()
257 	spin_lock_bh(&lock_data->spinlock);  in drm_legacy_lock_free()
258 	if (lock_data->kernel_waiters != 0) {  in drm_legacy_lock_free()
259 		drm_lock_transfer(lock_data, 0);  in drm_legacy_lock_free()
260 		lock_data->idle_has_lock = 1;  in drm_legacy_lock_free()
261 		spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_lock_free()
264 	spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_lock_free()
277 	wake_up_interruptible(&lock_data->lock_queue);  in drm_legacy_lock_free()
294 void drm_legacy_idlelock_take(struct drm_lock_data *lock_data)  in drm_legacy_idlelock_take()  argument
298 	spin_lock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_take()
299 	lock_data->kernel_waiters++;  in drm_legacy_idlelock_take()
300 	if (!lock_data->idle_has_lock) {  in drm_legacy_idlelock_take()
302 		spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_take()
303 		ret = drm_lock_take(lock_data, DRM_KERNEL_CONTEXT);  in drm_legacy_idlelock_take()
304 		spin_lock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_take()
307 			lock_data->idle_has_lock = 1;  in drm_legacy_idlelock_take()
309 	spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_take()
313 void drm_legacy_idlelock_release(struct drm_lock_data *lock_data)  in drm_legacy_idlelock_release()  argument
316 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_legacy_idlelock_release()
318 	spin_lock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_release()
319 	if (--lock_data->kernel_waiters == 0) {  in drm_legacy_idlelock_release()
320 		if (lock_data->idle_has_lock) {  in drm_legacy_idlelock_release()
325 			wake_up_interruptible(&lock_data->lock_queue);  in drm_legacy_idlelock_release()
326 			lock_data->idle_has_lock = 0;  in drm_legacy_idlelock_release()
329 	spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_release()