63 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_lock_take()
65 	spin_lock_bh(&lock_data->spinlock);  in drm_lock_take()
72 				((lock_data->user_waiters + lock_data->kernel_waiters > 1) ?  in drm_lock_take()
77 	spin_unlock_bh(&lock_data->spinlock);  in drm_lock_take()
98  * inside *_unlock to give lock to kernel before calling *_dma_schedule.
112 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_lock_transfer()
114 	lock_data->file_priv = NULL;  in drm_lock_transfer()
127 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_legacy_lock_free()
129 	spin_lock_bh(&lock_data->spinlock);  in drm_legacy_lock_free()
130 	if (lock_data->kernel_waiters != 0) {  in drm_legacy_lock_free()
132 		lock_data->idle_has_lock = 1;  in drm_legacy_lock_free()
133 		spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_lock_free()
136 	spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_lock_free()
149 	wake_up_interruptible(&lock_data->lock_queue);  in drm_legacy_lock_free()
169 	struct drm_master *master = file_priv->master;  in drm_legacy_lock()  local
173 		return -EOPNOTSUPP;  in drm_legacy_lock()
175 	++file_priv->lock_count;  in drm_legacy_lock()
177 	if (lock->context == DRM_KERNEL_CONTEXT) {  in drm_legacy_lock()
178 		DRM_ERROR("Process %d using kernel context %d\n",  in drm_legacy_lock()
179 			  task_pid_nr(current), lock->context);  in drm_legacy_lock()
180 		return -EINVAL;  in drm_legacy_lock()
184 		  lock->context, task_pid_nr(current),  in drm_legacy_lock()
185 		  master->lock.hw_lock ? master->lock.hw_lock->lock : -1,  in drm_legacy_lock()
186 		  lock->flags);  in drm_legacy_lock()
188 	add_wait_queue(&master->lock.lock_queue, &entry);  in drm_legacy_lock()
189 	spin_lock_bh(&master->lock.spinlock);  in drm_legacy_lock()
190 	master->lock.user_waiters++;  in drm_legacy_lock()
191 	spin_unlock_bh(&master->lock.spinlock);  in drm_legacy_lock()
195 		if (!master->lock.hw_lock) {  in drm_legacy_lock()
198 			ret = -EINTR;  in drm_legacy_lock()
201 		if (drm_lock_take(&master->lock, lock->context)) {  in drm_legacy_lock()
202 			master->lock.file_priv = file_priv;  in drm_legacy_lock()
203 			master->lock.lock_time = jiffies;  in drm_legacy_lock()
212 			ret = -EINTR;  in drm_legacy_lock()
216 	spin_lock_bh(&master->lock.spinlock);  in drm_legacy_lock()
217 	master->lock.user_waiters--;  in drm_legacy_lock()
218 	spin_unlock_bh(&master->lock.spinlock);  in drm_legacy_lock()
220 	remove_wait_queue(&master->lock.lock_queue, &entry);  in drm_legacy_lock()
222 	DRM_DEBUG("%d %s\n", lock->context,  in drm_legacy_lock()
226 	/* don't set the block all signals on the master process for now   in drm_legacy_lock()
230 		dev->sigdata.context = lock->context;  in drm_legacy_lock()
231 		dev->sigdata.lock = master->lock.hw_lock;  in drm_legacy_lock()
234 	if (dev->driver->dma_quiescent && (lock->flags & _DRM_LOCK_QUIESCENT))  in drm_legacy_lock()
236 		if (dev->driver->dma_quiescent(dev)) {  in drm_legacy_lock()
238 				  lock->context);  in drm_legacy_lock()
239 			return -EBUSY;  in drm_legacy_lock()
260 	struct drm_master *master = file_priv->master;  in drm_legacy_unlock()  local
263 		return -EOPNOTSUPP;  in drm_legacy_unlock()
265 	if (lock->context == DRM_KERNEL_CONTEXT) {  in drm_legacy_unlock()
266 		DRM_ERROR("Process %d using kernel context %d\n",  in drm_legacy_unlock()
267 			  task_pid_nr(current), lock->context);  in drm_legacy_unlock()
268 		return -EINVAL;  in drm_legacy_unlock()
271 	if (drm_legacy_lock_free(&master->lock, lock->context)) {  in drm_legacy_unlock()
280  * with the kernel context if it is free, otherwise it gets the highest priority when and if
283  * This guarantees that the kernel will _eventually_ have the lock _unless_ it is held
294 	spin_lock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_take()
295 	lock_data->kernel_waiters++;  in drm_legacy_idlelock_take()
296 	if (!lock_data->idle_has_lock) {  in drm_legacy_idlelock_take()
298 		spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_take()
300 		spin_lock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_take()
303 			lock_data->idle_has_lock = 1;  in drm_legacy_idlelock_take()
305 	spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_take()
312 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_legacy_idlelock_release()
314 	spin_lock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_release()
315 	if (--lock_data->kernel_waiters == 0) {  in drm_legacy_idlelock_release()
316 		if (lock_data->idle_has_lock) {  in drm_legacy_idlelock_release()
321 			wake_up_interruptible(&lock_data->lock_queue);  in drm_legacy_idlelock_release()
322 			lock_data->idle_has_lock = 0;  in drm_legacy_idlelock_release()
325 	spin_unlock_bh(&lock_data->spinlock);  in drm_legacy_idlelock_release()
332 	struct drm_master *master = file_priv->master;  in drm_legacy_i_have_hw_lock()  local
334 	return (file_priv->lock_count && master->lock.hw_lock &&  in drm_legacy_i_have_hw_lock()
335 		_DRM_LOCK_IS_HELD(master->lock.hw_lock->lock) &&  in drm_legacy_i_have_hw_lock()
336 		master->lock.file_priv == file_priv);  in drm_legacy_i_have_hw_lock()
341 	struct drm_file *file_priv = filp->private_data;  in drm_legacy_lock_release()
343 	/* if the master has gone away we can't do anything with the lock */  in drm_legacy_lock_release()
344 	if (!dev->master)  in drm_legacy_lock_release()
349 			  filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));  in drm_legacy_lock_release()
350 		drm_legacy_lock_free(&file_priv->master->lock,  in drm_legacy_lock_release()
351 				     _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));  in drm_legacy_lock_release()
355 void drm_legacy_lock_master_cleanup(struct drm_device *dev, struct drm_master *master)  in drm_legacy_lock_master_cleanup()  argument
361 	 * Since the master is disappearing, so is the  in drm_legacy_lock_master_cleanup()
364 	mutex_lock(&dev->struct_mutex);  in drm_legacy_lock_master_cleanup()
365 	if (master->lock.hw_lock) {  in drm_legacy_lock_master_cleanup()
366 		if (dev->sigdata.lock == master->lock.hw_lock)  in drm_legacy_lock_master_cleanup()
367 			dev->sigdata.lock = NULL;  in drm_legacy_lock_master_cleanup()
368 		master->lock.hw_lock = NULL;  in drm_legacy_lock_master_cleanup()
369 		master->lock.file_priv = NULL;  in drm_legacy_lock_master_cleanup()
370 		wake_up_interruptible_all(&master->lock.lock_queue);  in drm_legacy_lock_master_cleanup()
372 	mutex_unlock(&dev->struct_mutex);  in drm_legacy_lock_master_cleanup()