59 	struct drm_master *master = file_priv->master;  in drm_lock()  local
62 	++file_priv->lock_count;  in drm_lock()
64 	if (lock->context == DRM_KERNEL_CONTEXT) {  in drm_lock()
65 		DRM_ERROR("Process %d using kernel context %d\n",  in drm_lock()
66 			  DRM_CURRENTPID, lock->context);  in drm_lock()
67 		return -EINVAL;  in drm_lock()
71 		  lock->context, DRM_CURRENTPID,  in drm_lock()
72 		  master->lock.hw_lock->lock, lock->flags);  in drm_lock()
74 	mtx_lock(&master->lock.spinlock);  in drm_lock()
75 	master->lock.user_waiters++;  in drm_lock()
76 	mtx_unlock(&master->lock.spinlock);  in drm_lock()
80 		if (!master->lock.hw_lock) {  in drm_lock()
83 			ret = -EINTR;  in drm_lock()
87 		if (drm_lock_take(&master->lock, lock->context)) {  in drm_lock()
88 			master->lock.file_priv = file_priv;  in drm_lock()
89 			master->lock.lock_time = jiffies;  in drm_lock()
90 			atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);  in drm_lock()
96 		ret = -sx_sleep(&master->lock.lock_queue, &drm_global_mutex,  in drm_lock()
98 		if (ret == -ERESTART)  in drm_lock()
99 			ret = -ERESTARTSYS;  in drm_lock()
103 	mtx_lock(&master->lock.spinlock);  in drm_lock()
104 	master->lock.user_waiters--;  in drm_lock()
105 	mtx_unlock(&master->lock.spinlock);  in drm_lock()
107 	DRM_DEBUG("%d %s\n", lock->context,  in drm_lock()
112 	/* don't set the block all signals on the master process for now   in drm_lock()
115 	if (!file_priv->is_master) {  in drm_lock()
116 		sigemptyset(&dev->sigmask);  in drm_lock()
117 		sigaddset(&dev->sigmask, SIGSTOP);  in drm_lock()
118 		sigaddset(&dev->sigmask, SIGTSTP);  in drm_lock()
119 		sigaddset(&dev->sigmask, SIGTTIN);  in drm_lock()
120 		sigaddset(&dev->sigmask, SIGTTOU);  in drm_lock()
121 		dev->sigdata.context = lock->context;  in drm_lock()
122 		dev->sigdata.lock = master->lock.hw_lock;  in drm_lock()
123 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);  in drm_lock()
127 	if (dev->driver->dma_quiescent && (lock->flags & _DRM_LOCK_QUIESCENT))  in drm_lock()
129 		if (dev->driver->dma_quiescent(dev)) {  in drm_lock()
131 				  lock->context);  in drm_lock()
132 			return -EBUSY;  in drm_lock()
153 	struct drm_master *master = file_priv->master;  in drm_unlock()  local
155 	if (lock->context == DRM_KERNEL_CONTEXT) {  in drm_unlock()
156 		DRM_ERROR("Process %d using kernel context %d\n",  in drm_unlock()
157 			  DRM_CURRENTPID, lock->context);  in drm_unlock()
158 		return -EINVAL;  in drm_unlock()
161 	atomic_inc(&dev->counts[_DRM_STAT_UNLOCKS]);  in drm_unlock()
163 	if (drm_lock_free(&master->lock, lock->context)) {  in drm_unlock()
187 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_lock_take()
189 	mtx_lock(&lock_data->spinlock);  in drm_lock_take()
196 				((lock_data->user_waiters + lock_data->kernel_waiters > 1) ?  in drm_lock_take()
201 	mtx_unlock(&lock_data->spinlock);  in drm_lock_take()
222  * inside *_unlock to give lock to kernel before calling *_dma_schedule.
236 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_lock_transfer()
238 	lock_data->file_priv = NULL;  in drm_lock_transfer()
261 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_lock_free()
263 	mtx_lock(&lock_data->spinlock);  in drm_lock_free()
264 	if (lock_data->kernel_waiters != 0) {  in drm_lock_free()
266 		lock_data->idle_has_lock = 1;  in drm_lock_free()
267 		mtx_unlock(&lock_data->spinlock);  in drm_lock_free()
270 	mtx_unlock(&lock_data->spinlock);  in drm_lock_free()
283 	wake_up_interruptible(&lock_data->lock_queue);  in drm_lock_free()
305 	if (!s->lock || !_DRM_LOCK_IS_HELD(s->lock->lock)  in drm_notifier()
306 	    || _DRM_LOCKING_CONTEXT(s->lock->lock) != s->context)  in drm_notifier()
312 		old = s->lock->lock;  in drm_notifier()
314 		prev = cmpxchg(&s->lock->lock, old, new);  in drm_notifier()
322  * with the kernel context if it is free, otherwise it gets the highest priority when and if
325  * This guarantees that the kernel will _eventually_ have the lock _unless_ it is held
337 	mtx_lock(&lock_data->spinlock);  in drm_idlelock_take()
338 	lock_data->kernel_waiters++;  in drm_idlelock_take()
339 	if (!lock_data->idle_has_lock) {  in drm_idlelock_take()
341 		mtx_unlock(&lock_data->spinlock);  in drm_idlelock_take()
343 		mtx_lock(&lock_data->spinlock);  in drm_idlelock_take()
346 			lock_data->idle_has_lock = 1;  in drm_idlelock_take()
348 	mtx_unlock(&lock_data->spinlock);  in drm_idlelock_take()
355 	volatile unsigned int *lock = &lock_data->hw_lock->lock;  in drm_idlelock_release()
357 	mtx_lock(&lock_data->spinlock);  in drm_idlelock_release()
358 	if (--lock_data->kernel_waiters == 0) {  in drm_idlelock_release()
359 		if (lock_data->idle_has_lock) {  in drm_idlelock_release()
364 			wake_up_interruptible(&lock_data->lock_queue);  in drm_idlelock_release()
365 			lock_data->idle_has_lock = 0;  in drm_idlelock_release()
368 	mtx_unlock(&lock_data->spinlock);  in drm_idlelock_release()
374 	struct drm_master *master = file_priv->master;  in drm_i_have_hw_lock()  local
375 	return (file_priv->lock_count && master->lock.hw_lock &&  in drm_i_have_hw_lock()
376 		_DRM_LOCK_IS_HELD(master->lock.hw_lock->lock) &&  in drm_i_have_hw_lock()
377 		master->lock.file_priv == file_priv);  in drm_i_have_hw_lock()