2  * SPDX-License-Identifier: MIT
71  * the runtime pm wakeref and then call the intel_wakeref_ops->get()
74  * Note that intel_wakeref_ops->get() is allowed to fail, in which case
75  * the runtime-pm wakeref will be released and the acquisition unwound,
85 	if (unlikely(!atomic_inc_not_zero(&wf->count)))  in intel_wakeref_get()
103 	INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0);  in __intel_wakeref_get()
104 	atomic_inc(&wf->count);  in __intel_wakeref_get()
119 	return atomic_inc_not_zero(&wf->count);  in intel_wakeref_get_if_active()
130 	might_lock(&wf->mutex);  in intel_wakeref_might_get()
139  * the runtime pm wakeref will be released after the intel_wakeref_ops->put()
142  * Note that intel_wakeref_ops->put() is allowed to fail, in which case the
143  * runtime-pm wakeref is retained.
150 	GENMASK(BITS_PER_LONG - 1, __INTEL_WAKEREF_PUT_LAST_BIT__)  in __intel_wakeref_put()
152 	INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0);  in __intel_wakeref_put()
153 	if (unlikely(!atomic_add_unless(&wf->count, -1, 1)))  in __intel_wakeref_put()
171 intel_wakeref_put_delay(struct intel_wakeref *wf, unsigned long delay)  in intel_wakeref_put_delay()  argument
175 			    FIELD_PREP(INTEL_WAKEREF_PUT_DELAY, delay));  in intel_wakeref_put_delay()
181 	might_lock(&wf->mutex);  in intel_wakeref_might_put()
194 	__acquires(wf->mutex)  in intel_wakeref_lock()
196 	mutex_lock(&wf->mutex);  in intel_wakeref_lock()
207 	__releases(wf->mutex)  in intel_wakeref_unlock()
209 	mutex_unlock(&wf->mutex);  in intel_wakeref_unlock()
216  * Waits for the active callback (under the @wf->mutex or another CPU) is
222 	mutex_lock(&wf->mutex);  in intel_wakeref_unlock_wait()
223 	mutex_unlock(&wf->mutex);  in intel_wakeref_unlock_wait()
224 	flush_delayed_work(&wf->work);  in intel_wakeref_unlock_wait()
236 	return READ_ONCE(wf->wakeref);  in intel_wakeref_is_active()
246 	lockdep_assert_held(&wf->mutex);  in __intel_wakeref_defer_park()
247 	INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count));  in __intel_wakeref_defer_park()
248 	atomic_set_release(&wf->count, 1);  in __intel_wakeref_defer_park()
273  * intel_wakeref_auto: Delay the runtime-pm autosuspend
277  * The runtime-pm core uses a suspend delay after the last wakeref
279  * delay is configurable via sysfs with little regard to the device
280  * characteristics. Instead, we want to tune the autosuspend based on our
284  * Pass @timeout = 0 to cancel a previous autosuspend by executing the