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drm/panfrost: introduce panfrost_devfreq struct 

Introduce a proper panfrost_devfreq to deal with devfreq variables.

Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200710095409.407087-5-peron.clem@gmail.com
This commit is contained in:
Clément Péron 2020-07-10 11:53:59 +02:00 committed by Rob Herring
parent eb9dd67249
commit 9bfacfc82f
4 changed files with 66 additions and 47 deletions
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76
drivers/gpu/drm/panfrost/panfrost_devfreq.c
View File

@ -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);
}

20
drivers/gpu/drm/panfrost/panfrost_devfreq.h
View File

@ -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__ */

11
drivers/gpu/drm/panfrost/panfrost_device.h
View File

@ -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 {

6
drivers/gpu/drm/panfrost/panfrost_job.c
View File

@ -145,7 +145,7 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js)
u64 jc_head = job->jc;
int ret;
panfrost_devfreq_record_busy(pfdev);
panfrost_devfreq_record_busy(&pfdev->pfdevfreq);
ret = pm_runtime_get_sync(pfdev->dev);
if (ret < 0)
@ -410,7 +410,7 @@ static void panfrost_job_timedout(struct drm_sched_job *sched_job)
for (i = 0; i < NUM_JOB_SLOTS; i++) {
if (pfdev->jobs[i]) {
pm_runtime_put_noidle(pfdev->dev);
panfrost_devfreq_record_idle(pfdev);
panfrost_devfreq_record_idle(&pfdev->pfdevfreq);
pfdev->jobs[i] = NULL;
}
}
@ -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);