/**
* hrtimer_forward - forward the timer expiry
* @timer: hrtimer to forward
* @now: forward past this time
* @interval: the interval to forward
*
* Forward the timer expiry so it will expire in the future.
* Returns the number of overruns.
*/
u64 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval)
{
u64 orun = 1;
ktime_t delta;
delta = ktime_sub(now, hrtimer_get_expires(timer));
if (delta.tv64 < 0)
return 0;
if (interval.tv64 < timer->base->resolution.tv64)
interval.tv64 = timer->base->resolution.tv64;
if (unlikely(delta.tv64 >= interval.tv64)) {
s64 incr = ktime_to_ns(interval);
orun = ktime_divns(delta, incr);
hrtimer_add_expires_ns(timer, incr * orun);
if (hrtimer_get_expires_tv64(timer) > now.tv64)
return orun;
/*
* This (and the ktime_add() below) is the
* correction for exact:
*/
orun++;
}
hrtimer_add_expires(timer, interval);
return orun;
}
/**
* hrtimer_forward - forward the timer expiry
* @timer: hrtimer to forward
* @now: forward past this time
* @interval: the interval to forward
*
* Forward the timer expiry so it will expire in the future.
* Returns the number of overruns.
*
* Can be safely called from the callback function of @timer. If
* called from other contexts @timer must neither be enqueued nor
* running the callback and the caller needs to take care of
* serialization.
*
* Note: This only updates the timer expiry value and does not requeue
* the timer.
*/
u64 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval)
{
u64 orun = 1;
ktime_t delta;
delta = ktime_sub(now, hrtimer_get_expires(timer));
if (delta < 0)
return 0;
if (WARN_ON(timer->state & HRTIMER_STATE_ENQUEUED))
return 0;
if (interval < hrtimer_resolution)
interval = hrtimer_resolution;
if (unlikely(delta >= interval)) {
s64 incr = ktime_to_ns(interval);
orun = ktime_divns(delta, incr);
hrtimer_add_expires_ns(timer, incr * orun);
if (hrtimer_get_expires_tv64(timer) > now)
return orun;
/*
* This (and the ktime_add() below) is the
* correction for exact:
*/
orun++;
}
hrtimer_add_expires(timer, interval);
return orun;
}
static enum hrtimer_restart kbasep_pm_do_gpu_poweroff_callback(struct hrtimer *timer)
{
kbase_device *kbdev;
kbdev = container_of(timer, kbase_device, pm.gpu_poweroff_timer);
/* It is safe for this call to do nothing if the work item is already queued.
* The worker function will read the must up-to-date state of kbdev->pm.gpu_poweroff_pending
* under lock.
*
* If a state change occurs while the worker function is processing, this
* call will succeed as a work item can be requeued once it has started
* processing.
*/
if (kbdev->pm.gpu_poweroff_pending)
queue_work(kbdev->pm.gpu_poweroff_wq, &kbdev->pm.gpu_poweroff_work);
if (kbdev->pm.shader_poweroff_pending) {
unsigned long flags;
spin_lock_irqsave(&kbdev->pm.power_change_lock, flags);
if (kbdev->pm.shader_poweroff_pending) {
kbdev->pm.shader_poweroff_pending_time--;
KBASE_DEBUG_ASSERT(kbdev->pm.shader_poweroff_pending_time >= 0);
if (kbdev->pm.shader_poweroff_pending_time == 0) {
u64 prev_shader_state = kbdev->pm.desired_shader_state;
kbdev->pm.desired_shader_state &= ~kbdev->pm.shader_poweroff_pending;
kbdev->pm.shader_poweroff_pending = 0;
if (prev_shader_state != kbdev->pm.desired_shader_state ||
kbdev->pm.ca_in_transition != MALI_FALSE) {
mali_bool cores_are_available;
KBASE_TIMELINE_PM_CHECKTRANS(kbdev, SW_FLOW_PM_CHECKTRANS_PM_RELEASE_CORES_DEFERRED_START);
cores_are_available = kbase_pm_check_transitions_nolock(kbdev);
KBASE_TIMELINE_PM_CHECKTRANS(kbdev, SW_FLOW_PM_CHECKTRANS_PM_RELEASE_CORES_DEFERRED_END);
/* Don't need 'cores_are_available', because we don't return anything */
CSTD_UNUSED(cores_are_available);
}
}
}
spin_unlock_irqrestore(&kbdev->pm.power_change_lock, flags);
}
hrtimer_add_expires(timer, kbdev->pm.gpu_poweroff_time);
return HRTIMER_RESTART;
}
/* timr->it_lock is taken. */
static int
common_timer_set(struct k_itimer *timr, int flags,
struct itimerspec *new_setting, struct itimerspec *old_setting)
{
struct hrtimer *timer = &timr->it.real.timer;
enum hrtimer_mode mode;
if (old_setting)
common_timer_get(timr, old_setting);
/* disable the timer */
timr->it.real.interval.tv64 = 0;
/*
* careful here. If smp we could be in the "fire" routine which will
* be spinning as we hold the lock. But this is ONLY an SMP issue.
*/
if (hrtimer_try_to_cancel(timer) < 0)
return TIMER_RETRY;
timr->it_requeue_pending = (timr->it_requeue_pending + 2) &
~REQUEUE_PENDING;
timr->it_overrun_last = 0;
/* switch off the timer when it_value is zero */
if (!new_setting->it_value.tv_sec && !new_setting->it_value.tv_nsec)
return 0;
mode = flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL;
hrtimer_init(&timr->it.real.timer, timr->it_clock, mode);
timr->it.real.timer.function = posix_timer_fn;
hrtimer_set_expires(timer, timespec_to_ktime(new_setting->it_value));
/* Convert interval */
timr->it.real.interval = timespec_to_ktime(new_setting->it_interval);
/* SIGEV_NONE timers are not queued ! See common_timer_get */
if (((timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE)) {
/* Setup correct expiry time for relative timers */
if (mode == HRTIMER_MODE_REL) {
hrtimer_add_expires(timer, timer->base->get_time());
}
return 0;
}
hrtimer_start_expires(timer, mode);
return 0;
}
static int
common_timer_set(struct k_itimer *timr, int flags,
struct itimerspec *new_setting, struct itimerspec *old_setting)
{
struct hrtimer *timer = &timr->it.real.timer;
enum hrtimer_mode mode;
if (old_setting)
common_timer_get(timr, old_setting);
timr->it.real.interval.tv64 = 0;
if (hrtimer_try_to_cancel(timer) < 0)
return TIMER_RETRY;
timr->it_requeue_pending = (timr->it_requeue_pending + 2) &
~REQUEUE_PENDING;
timr->it_overrun_last = 0;
if (!new_setting->it_value.tv_sec && !new_setting->it_value.tv_nsec)
return 0;
mode = flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL;
hrtimer_init(&timr->it.real.timer, timr->it_clock, mode);
timr->it.real.timer.function = posix_timer_fn;
hrtimer_set_expires(timer, timespec_to_ktime(new_setting->it_value));
timr->it.real.interval = timespec_to_ktime(new_setting->it_interval);
if (((timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE)) {
if (mode == HRTIMER_MODE_REL) {
hrtimer_add_expires(timer, timer->base->get_time());
}
return 0;
}
hrtimer_start_expires(timer, mode);
return 0;
}
