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Subject[PATCH 04/15] drm/panfrost: introduce panfrost_devfreq struct
Date
Introduce a proper panfrost_devfreq to deal with devfreq variables.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 76 ++++++++++++---------
drivers/gpu/drm/panfrost/panfrost_devfreq.h | 20 +++++-
drivers/gpu/drm/panfrost/panfrost_device.h | 11 +--
drivers/gpu/drm/panfrost/panfrost_job.c | 6 +-
4 files changed, 66 insertions(+), 47 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index df7b71da9a84..962550363391 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -10,23 +10,23 @@
#include "panfrost_device.h"
#include "panfrost_devfreq.h"

-static void panfrost_devfreq_update_utilization(struct panfrost_device *pfdev)
+static void panfrost_devfreq_update_utilization(struct panfrost_devfreq *pfdevfreq)
{
ktime_t now;
ktime_t last;

- if (!pfdev->devfreq.devfreq)
+ if (!pfdevfreq->devfreq)
return;

now = ktime_get();
- last = pfdev->devfreq.time_last_update;
+ last = pfdevfreq->time_last_update;

- if (atomic_read(&pfdev->devfreq.busy_count) > 0)
- pfdev->devfreq.busy_time += ktime_sub(now, last);
+ if (atomic_read(&pfdevfreq->busy_count) > 0)
+ pfdevfreq->busy_time += ktime_sub(now, last);
else
- pfdev->devfreq.idle_time += ktime_sub(now, last);
+ pfdevfreq->idle_time += ktime_sub(now, last);

- pfdev->devfreq.time_last_update = now;
+ pfdevfreq->time_last_update = now;
}

static int panfrost_devfreq_target(struct device *dev, unsigned long *freq,
@@ -47,30 +47,31 @@ static int panfrost_devfreq_target(struct device *dev, unsigned long *freq,
return 0;
}

-static void panfrost_devfreq_reset(struct panfrost_device *pfdev)
+static void panfrost_devfreq_reset(struct panfrost_devfreq *pfdevfreq)
{
- pfdev->devfreq.busy_time = 0;
- pfdev->devfreq.idle_time = 0;
- pfdev->devfreq.time_last_update = ktime_get();
+ pfdevfreq->busy_time = 0;
+ pfdevfreq->idle_time = 0;
+ pfdevfreq->time_last_update = ktime_get();
}

static int panfrost_devfreq_get_dev_status(struct device *dev,
struct devfreq_dev_status *status)
{
struct panfrost_device *pfdev = dev_get_drvdata(dev);
+ struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;

- panfrost_devfreq_update_utilization(pfdev);
+ panfrost_devfreq_update_utilization(pfdevfreq);

status->current_frequency = clk_get_rate(pfdev->clock);
- status->total_time = ktime_to_ns(ktime_add(pfdev->devfreq.busy_time,
- pfdev->devfreq.idle_time));
+ status->total_time = ktime_to_ns(ktime_add(pfdevfreq->busy_time,
+ pfdevfreq->idle_time));

- status->busy_time = ktime_to_ns(pfdev->devfreq.busy_time);
+ status->busy_time = ktime_to_ns(pfdevfreq->busy_time);

- panfrost_devfreq_reset(pfdev);
+ panfrost_devfreq_reset(pfdevfreq);

- dev_dbg(pfdev->dev, "busy %lu total %lu %lu %% freq %lu MHz\n", status->busy_time,
- status->total_time,
+ dev_dbg(pfdev->dev, "busy %lu total %lu %lu %% freq %lu MHz\n",
+ status->busy_time, status->total_time,
status->busy_time / (status->total_time / 100),
status->current_frequency / 1000 / 1000);

@@ -91,6 +92,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
struct device *dev = &pfdev->pdev->dev;
struct devfreq *devfreq;
struct thermal_cooling_device *cooling;
+ struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;

ret = dev_pm_opp_of_add_table(dev);
if (ret == -ENODEV) /* Optional, continue without devfreq */
@@ -98,7 +100,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
else if (ret)
return ret;

- panfrost_devfreq_reset(pfdev);
+ panfrost_devfreq_reset(pfdevfreq);

cur_freq = clk_get_rate(pfdev->clock);

@@ -116,53 +118,59 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
dev_pm_opp_of_remove_table(dev);
return PTR_ERR(devfreq);
}
- pfdev->devfreq.devfreq = devfreq;
+ pfdevfreq->devfreq = devfreq;

cooling = of_devfreq_cooling_register(dev->of_node, devfreq);
if (IS_ERR(cooling))
DRM_DEV_INFO(dev, "Failed to register cooling device\n");
else
- pfdev->devfreq.cooling = cooling;
+ pfdevfreq->cooling = cooling;

return 0;
}

void panfrost_devfreq_fini(struct panfrost_device *pfdev)
{
- if (pfdev->devfreq.cooling)
- devfreq_cooling_unregister(pfdev->devfreq.cooling);
+ struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
+
+ if (pfdevfreq->cooling)
+ devfreq_cooling_unregister(pfdevfreq->cooling);
dev_pm_opp_of_remove_table(&pfdev->pdev->dev);
}

void panfrost_devfreq_resume(struct panfrost_device *pfdev)
{
- if (!pfdev->devfreq.devfreq)
+ struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
+
+ if (!pfdevfreq->devfreq)
return;

- panfrost_devfreq_reset(pfdev);
+ panfrost_devfreq_reset(pfdevfreq);

- devfreq_resume_device(pfdev->devfreq.devfreq);
+ devfreq_resume_device(pfdevfreq->devfreq);
}

void panfrost_devfreq_suspend(struct panfrost_device *pfdev)
{
- if (!pfdev->devfreq.devfreq)
+ struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
+
+ if (!pfdevfreq->devfreq)
return;

- devfreq_suspend_device(pfdev->devfreq.devfreq);
+ devfreq_suspend_device(pfdevfreq->devfreq);
}

-void panfrost_devfreq_record_busy(struct panfrost_device *pfdev)
+void panfrost_devfreq_record_busy(struct panfrost_devfreq *pfdevfreq)
{
- panfrost_devfreq_update_utilization(pfdev);
- atomic_inc(&pfdev->devfreq.busy_count);
+ panfrost_devfreq_update_utilization(pfdevfreq);
+ atomic_inc(&pfdevfreq->busy_count);
}

-void panfrost_devfreq_record_idle(struct panfrost_device *pfdev)
+void panfrost_devfreq_record_idle(struct panfrost_devfreq *pfdevfreq)
{
int count;

- panfrost_devfreq_update_utilization(pfdev);
- count = atomic_dec_if_positive(&pfdev->devfreq.busy_count);
+ panfrost_devfreq_update_utilization(pfdevfreq);
+ count = atomic_dec_if_positive(&pfdevfreq->busy_count);
WARN_ON(count < 0);
}
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
index 0611beffc8d0..0697f8d5aa34 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
@@ -4,13 +4,29 @@
#ifndef __PANFROST_DEVFREQ_H__
#define __PANFROST_DEVFREQ_H__

+#include <linux/ktime.h>
+
+struct devfreq;
+struct thermal_cooling_device;
+
+struct panfrost_device;
+
+struct panfrost_devfreq {
+ struct devfreq *devfreq;
+ struct thermal_cooling_device *cooling;
+ ktime_t busy_time;
+ ktime_t idle_time;
+ ktime_t time_last_update;
+ atomic_t busy_count;
+};
+
int panfrost_devfreq_init(struct panfrost_device *pfdev);
void panfrost_devfreq_fini(struct panfrost_device *pfdev);

void panfrost_devfreq_resume(struct panfrost_device *pfdev);
void panfrost_devfreq_suspend(struct panfrost_device *pfdev);

-void panfrost_devfreq_record_busy(struct panfrost_device *pfdev);
-void panfrost_devfreq_record_idle(struct panfrost_device *pfdev);
+void panfrost_devfreq_record_busy(struct panfrost_devfreq *devfreq);
+void panfrost_devfreq_record_idle(struct panfrost_devfreq *devfreq);

#endif /* __PANFROST_DEVFREQ_H__ */
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
index c30c719a8059..2efa59c9d1c5 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -13,6 +13,8 @@
#include <drm/drm_mm.h>
#include <drm/gpu_scheduler.h>

+#include "panfrost_devfreq.h"
+
struct panfrost_device;
struct panfrost_mmu;
struct panfrost_job_slot;
@@ -107,14 +109,7 @@ struct panfrost_device {
struct list_head shrinker_list;
struct shrinker shrinker;

- struct {
- struct devfreq *devfreq;
- struct thermal_cooling_device *cooling;
- ktime_t busy_time;
- ktime_t idle_time;
- ktime_t time_last_update;
- atomic_t busy_count;
- } devfreq;
+ struct panfrost_devfreq pfdevfreq;
};

struct panfrost_mmu {
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
index 63e32a9f2749..a67f3eac6a58 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -155,7 +155,7 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js)
}

cfg = panfrost_mmu_as_get(pfdev, &job->file_priv->mmu);
- panfrost_devfreq_record_busy(pfdev);
+ panfrost_devfreq_record_busy(&pfdev->pfdevfreq);

job_write(pfdev, JS_HEAD_NEXT_LO(js), jc_head & 0xFFFFFFFF);
job_write(pfdev, JS_HEAD_NEXT_HI(js), jc_head >> 32);
@@ -415,7 +415,7 @@ static void panfrost_job_timedout(struct drm_sched_job *sched_job)
}
spin_unlock_irqrestore(&pfdev->js->job_lock, flags);

- panfrost_devfreq_record_idle(pfdev);
+ panfrost_devfreq_record_idle(&pfdev->pfdevfreq);
panfrost_device_reset(pfdev);

for (i = 0; i < NUM_JOB_SLOTS; i++)
@@ -478,7 +478,7 @@ static irqreturn_t panfrost_job_irq_handler(int irq, void *data)
pfdev->jobs[j] = NULL;

panfrost_mmu_as_put(pfdev, &job->file_priv->mmu);
- panfrost_devfreq_record_idle(pfdev);
+ panfrost_devfreq_record_idle(&pfdev->pfdevfreq);

dma_fence_signal_locked(job->done_fence);
pm_runtime_put_autosuspend(pfdev->dev);
--
2.20.1
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