Lines Matching refs:wf
12 static void rpm_get(struct intel_wakeref *wf)
14 wf->wakeref = intel_runtime_pm_get(wf->rpm);
17 static void rpm_put(struct intel_wakeref *wf)
19 intel_wakeref_t wakeref = fetch_and_zero(&wf->wakeref);
21 intel_runtime_pm_put(wf->rpm, wakeref);
25 int __intel_wakeref_get_first(struct intel_wakeref *wf)
33 mutex_lock_nested(&wf->mutex, SINGLE_DEPTH_NESTING);
34 if (!atomic_read(&wf->count)) {
37 rpm_get(wf);
39 err = wf->ops->get(wf);
41 rpm_put(wf);
42 mutex_unlock(&wf->mutex);
46 smp_mb__before_atomic(); /* release wf->count */
48 atomic_inc(&wf->count);
49 mutex_unlock(&wf->mutex);
51 INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0);
55 static void ____intel_wakeref_put_last(struct intel_wakeref *wf)
57 INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0);
58 if (unlikely(!atomic_dec_and_test(&wf->count)))
62 if (likely(!wf->ops->put(wf))) {
63 rpm_put(wf);
64 wake_up_var(&wf->wakeref);
68 mutex_unlock(&wf->mutex);
71 void __intel_wakeref_put_last(struct intel_wakeref *wf, unsigned long flags)
73 INTEL_WAKEREF_BUG_ON(delayed_work_pending(&wf->work));
76 if (flags & INTEL_WAKEREF_PUT_ASYNC || !mutex_trylock(&wf->mutex)) {
77 mod_delayed_work(system_wq, &wf->work,
82 ____intel_wakeref_put_last(wf);
87 struct intel_wakeref *wf = container_of(wrk, typeof(*wf), work.work);
89 if (atomic_add_unless(&wf->count, -1, 1))
92 mutex_lock(&wf->mutex);
93 ____intel_wakeref_put_last(wf);
96 void __intel_wakeref_init(struct intel_wakeref *wf,
101 wf->rpm = rpm;
102 wf->ops = ops;
104 __mutex_init(&wf->mutex, "wakeref.mutex", &key->mutex);
105 atomic_set(&wf->count, 0);
106 wf->wakeref = 0;
108 INIT_DELAYED_WORK(&wf->work, __intel_wakeref_put_work);
109 lockdep_init_map(&wf->work.work.lockdep_map,
113 int intel_wakeref_wait_for_idle(struct intel_wakeref *wf)
119 err = wait_var_event_killable(&wf->wakeref,
120 !intel_wakeref_is_active(wf));
124 intel_wakeref_unlock_wait(wf);
130 struct intel_wakeref_auto *wf = from_timer(wf, t, timer);
134 if (!refcount_dec_and_lock_irqsave(&wf->count, &wf->lock, &flags))
137 wakeref = fetch_and_zero(&wf->wakeref);
138 spin_unlock_irqrestore(&wf->lock, flags);
140 intel_runtime_pm_put(wf->rpm, wakeref);
143 void intel_wakeref_auto_init(struct intel_wakeref_auto *wf,
146 spin_lock_init(&wf->lock);
147 timer_setup(&wf->timer, wakeref_auto_timeout, 0);
148 refcount_set(&wf->count, 0);
149 wf->wakeref = 0;
150 wf->rpm = rpm;
153 void intel_wakeref_auto(struct intel_wakeref_auto *wf, unsigned long timeout)
158 if (del_timer_sync(&wf->timer))
159 wakeref_auto_timeout(&wf->timer);
164 assert_rpm_wakelock_held(wf->rpm);
166 if (!refcount_inc_not_zero(&wf->count)) {
167 spin_lock_irqsave(&wf->lock, flags);
168 if (!refcount_inc_not_zero(&wf->count)) {
169 INTEL_WAKEREF_BUG_ON(wf->wakeref);
170 wf->wakeref = intel_runtime_pm_get_if_in_use(wf->rpm);
171 refcount_set(&wf->count, 1);
173 spin_unlock_irqrestore(&wf->lock, flags);
179 * elided callback to keep the wf->count balanced.
181 if (mod_timer(&wf->timer, jiffies + timeout))
182 wakeref_auto_timeout(&wf->timer);
185 void intel_wakeref_auto_fini(struct intel_wakeref_auto *wf)
187 intel_wakeref_auto(wf, 0);
188 INTEL_WAKEREF_BUG_ON(wf->wakeref);