1 files changed, 264 insertions, 0 deletions

diff --git a/drivers/gpu/arm/t6xx/kbase/src/common/mali_kbase_pm_metrics.c b/drivers/gpu/arm/t6xx/kbase/src/common/mali_kbase_pm_metrics.c
new file mode 100755
index 00000000000..fdd765e3f09
--- /dev/null
+++ b/drivers/gpu/arm/t6xx/kbase/src/common/mali_kbase_pm_metrics.c
@@ -0,0 +1,264 @@
+/*
+ *
+ * (C) COPYRIGHT 2011-2013 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU licence.
+ *
+ * A copy of the licence is included with the program, and can also be obtained
+ * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ */
+
+
+
+/**
+ * @file mali_kbase_pm_metrics.c
+ * Metrics for power management
+ */
+
+#include <kbase/src/common/mali_kbase.h>
+#include <kbase/src/common/mali_kbase_pm.h>
+
+/* When VSync is being hit aim for utilisation between 70-90% */
+#define KBASE_PM_VSYNC_MIN_UTILISATION          70
+#define KBASE_PM_VSYNC_MAX_UTILISATION          90
+/* Otherwise aim for 10-40% */
+#define KBASE_PM_NO_VSYNC_MIN_UTILISATION       10
+#define KBASE_PM_NO_VSYNC_MAX_UTILISATION       40
+
+/* Shift used for kbasep_pm_metrics_data.time_busy/idle - units of (1 << 8) ns
+   This gives a maximum period between samples of 2^(32+8)/100 ns = slightly under 11s.
+   Exceeding this will cause overflow */
+#define KBASE_PM_TIME_SHIFT			8
+
+static enum hrtimer_restart dvfs_callback(struct hrtimer *timer)
+{
+	unsigned long flags;
+	kbase_pm_dvfs_action action;
+	kbasep_pm_metrics_data *metrics;
+
+	KBASE_DEBUG_ASSERT(timer != NULL);
+
+	metrics = container_of(timer, kbasep_pm_metrics_data, timer);
+	action = kbase_pm_get_dvfs_action(metrics->kbdev);
+
+	spin_lock_irqsave(&metrics->lock, flags);
+
+	if (metrics->timer_active)
+		hrtimer_start(timer,
+					  HR_TIMER_DELAY_MSEC(metrics->kbdev->pm.platform_dvfs_frequency),
+					  HRTIMER_MODE_REL);
+
+	spin_unlock_irqrestore(&metrics->lock, flags);
+
+	return HRTIMER_NORESTART;
+}
+
+mali_error kbasep_pm_metrics_init(kbase_device *kbdev)
+{
+	KBASE_DEBUG_ASSERT(kbdev != NULL);
+
+	kbdev->pm.metrics.kbdev = kbdev;
+	kbdev->pm.metrics.vsync_hit = 0;
+	kbdev->pm.metrics.utilisation = 0;
+
+	kbdev->pm.metrics.time_period_start = ktime_get();
+	kbdev->pm.metrics.time_busy = 0;
+	kbdev->pm.metrics.time_idle = 0;
+	kbdev->pm.metrics.gpu_active = MALI_TRUE;
+	kbdev->pm.metrics.timer_active = MALI_TRUE;
+
+	spin_lock_init(&kbdev->pm.metrics.lock);
+
+	hrtimer_init(&kbdev->pm.metrics.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	kbdev->pm.metrics.timer.function = dvfs_callback;
+
+	hrtimer_start(&kbdev->pm.metrics.timer, HR_TIMER_DELAY_MSEC(kbdev->pm.platform_dvfs_frequency), HRTIMER_MODE_REL);
+
+	kbase_pm_register_vsync_callback(kbdev);
+
+	return MALI_ERROR_NONE;
+}
+
+KBASE_EXPORT_TEST_API(kbasep_pm_metrics_init)
+
+void kbasep_pm_metrics_term(kbase_device *kbdev)
+{
+	unsigned long flags;
+	KBASE_DEBUG_ASSERT(kbdev != NULL);
+
+	spin_lock_irqsave(&kbdev->pm.metrics.lock, flags);
+	kbdev->pm.metrics.timer_active = MALI_FALSE;
+	spin_unlock_irqrestore(&kbdev->pm.metrics.lock, flags);
+
+	hrtimer_cancel(&kbdev->pm.metrics.timer);
+
+	kbase_pm_unregister_vsync_callback(kbdev);
+}
+
+KBASE_EXPORT_TEST_API(kbasep_pm_metrics_term)
+
+void kbasep_pm_record_gpu_idle(kbase_device *kbdev)
+{
+	unsigned long flags;
+	ktime_t now;
+	ktime_t diff;
+
+	KBASE_DEBUG_ASSERT(kbdev != NULL);
+
+	spin_lock_irqsave(&kbdev->pm.metrics.lock, flags);
+
+	KBASE_DEBUG_ASSERT(kbdev->pm.metrics.gpu_active == MALI_TRUE);
+
+	kbdev->pm.metrics.gpu_active = MALI_FALSE;
+
+	now = ktime_get();
+	diff = ktime_sub(now, kbdev->pm.metrics.time_period_start);
+
+	kbdev->pm.metrics.time_busy += (u32) (ktime_to_ns(diff) >> KBASE_PM_TIME_SHIFT);
+	kbdev->pm.metrics.time_period_start = now;
+
+	spin_unlock_irqrestore(&kbdev->pm.metrics.lock, flags);
+}
+
+KBASE_EXPORT_TEST_API(kbasep_pm_record_gpu_idle)
+
+void kbasep_pm_record_gpu_active(kbase_device *kbdev)
+{
+	unsigned long flags;
+	ktime_t now;
+	ktime_t diff;
+
+	KBASE_DEBUG_ASSERT(kbdev != NULL);
+
+	spin_lock_irqsave(&kbdev->pm.metrics.lock, flags);
+
+	KBASE_DEBUG_ASSERT(kbdev->pm.metrics.gpu_active == MALI_FALSE);
+
+	kbdev->pm.metrics.gpu_active = MALI_TRUE;
+
+	now = ktime_get();
+	diff = ktime_sub(now, kbdev->pm.metrics.time_period_start);
+
+	kbdev->pm.metrics.time_idle += (u32) (ktime_to_ns(diff) >> KBASE_PM_TIME_SHIFT);
+	kbdev->pm.metrics.time_period_start = now;
+
+	spin_unlock_irqrestore(&kbdev->pm.metrics.lock, flags);
+}
+
+KBASE_EXPORT_TEST_API(kbasep_pm_record_gpu_active)
+
+void kbase_pm_report_vsync(kbase_device *kbdev, int buffer_updated)
+{
+	unsigned long flags;
+	KBASE_DEBUG_ASSERT(kbdev != NULL);
+
+	spin_lock_irqsave(&kbdev->pm.metrics.lock, flags);
+	kbdev->pm.metrics.vsync_hit = buffer_updated;
+	spin_unlock_irqrestore(&kbdev->pm.metrics.lock, flags);
+}
+
+KBASE_EXPORT_TEST_API(kbase_pm_report_vsync)
+
+/*caller needs to hold kbdev->pm.metrics.lock before calling this function*/
+int kbase_pm_get_dvfs_utilisation(kbase_device *kbdev)
+{
+	int utilisation = 0;
+	ktime_t now = ktime_get();
+	ktime_t diff;
+
+	KBASE_DEBUG_ASSERT(kbdev != NULL);
+
+	diff = ktime_sub(now, kbdev->pm.metrics.time_period_start);
+
+	if (kbdev->pm.metrics.gpu_active) {
+		kbdev->pm.metrics.time_busy += (u32) (ktime_to_ns(diff) >> KBASE_PM_TIME_SHIFT);
+		kbdev->pm.metrics.time_period_start = now;
+	} else {
+		kbdev->pm.metrics.time_idle += (u32) (ktime_to_ns(diff) >> KBASE_PM_TIME_SHIFT);
+		kbdev->pm.metrics.time_period_start = now;
+	}
+
+	if (kbdev->pm.metrics.time_idle + kbdev->pm.metrics.time_busy == 0) {
+		/* No data - so we return NOP */
+		utilisation = -1;
+		goto out;
+	}
+
+	utilisation = (100 * kbdev->pm.metrics.time_busy) / (kbdev->pm.metrics.time_idle + kbdev->pm.metrics.time_busy);
+
+ out:
+
+	kbdev->pm.metrics.time_idle = 0;
+	kbdev->pm.metrics.time_busy = 0;
+
+	return utilisation;
+}
+
+kbase_pm_dvfs_action kbase_pm_get_dvfs_action(kbase_device *kbdev)
+{
+	unsigned long flags;
+	int utilisation;
+	kbase_pm_dvfs_action action;
+
+	KBASE_DEBUG_ASSERT(kbdev != NULL);
+
+	spin_lock_irqsave(&kbdev->pm.metrics.lock, flags);
+
+	utilisation = kbase_pm_get_dvfs_utilisation(kbdev);
+
+	if (utilisation < 0) {
+		action = KBASE_PM_DVFS_NOP;
+		utilisation = 0;
+		goto out;
+	}
+
+	if (kbdev->pm.metrics.vsync_hit) {
+		/* VSync is being met */
+		if (utilisation < KBASE_PM_VSYNC_MIN_UTILISATION)
+			action = KBASE_PM_DVFS_CLOCK_DOWN;
+		else if (utilisation > KBASE_PM_VSYNC_MAX_UTILISATION)
+			action = KBASE_PM_DVFS_CLOCK_UP;
+		else
+			action = KBASE_PM_DVFS_NOP;
+	} else {
+		/* VSync is being missed */
+		if (utilisation < KBASE_PM_NO_VSYNC_MIN_UTILISATION)
+			action = KBASE_PM_DVFS_CLOCK_DOWN;
+		else if (utilisation > KBASE_PM_NO_VSYNC_MAX_UTILISATION)
+			action = KBASE_PM_DVFS_CLOCK_UP;
+		else
+			action = KBASE_PM_DVFS_NOP;
+	}
+
+	kbdev->pm.metrics.utilisation = utilisation;
+ out:
+#ifdef CONFIG_MALI_T6XX_DVFS
+	kbase_platform_dvfs_event(kbdev, utilisation);
+#endif				/*CONFIG_MALI_T6XX_DVFS */
+	kbdev->pm.metrics.time_idle = 0;
+	kbdev->pm.metrics.time_busy = 0;
+	spin_unlock_irqrestore(&kbdev->pm.metrics.lock, flags);
+
+	return action;
+}
+KBASE_EXPORT_TEST_API(kbase_pm_get_dvfs_action)
+
+mali_bool kbase_pm_metrics_is_active(kbase_device *kbdev)
+{
+	mali_bool isactive;
+	unsigned long flags;
+
+	KBASE_DEBUG_ASSERT(kbdev != NULL);
+
+	spin_lock_irqsave(&kbdev->pm.metrics.lock, flags);
+	isactive = (kbdev->pm.metrics.timer_active == MALI_TRUE);
+	spin_unlock_irqrestore(&kbdev->pm.metrics.lock, flags);
+
+	return isactive;
+}
+KBASE_EXPORT_TEST_API(kbase_pm_metrics_is_active)