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MALI Utgard: RK: add nodes to get gpu_utilisation

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Change-Id: I7ceebd882282fc08c8560fba5ec8978d18d5b819
Signed-off-by: Zhen Chen <chenzhen@rock-chips.com>
This commit is contained in:
Zhen Chen 2017-11-19 17:40:31 +08:00 • committed by Tao Huang
commit dac44b4210
1 changed files with 101 additions and 1 deletions
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102
drivers/gpu/arm/mali400/mali/platform/rk/rk.c
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@ -34,6 +34,7 @@
#include <linux/workqueue.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/rockchip/cpu.h>
#include <linux/mali/mali_utgard.h>
@ -46,6 +47,8 @@ u32 mali_group_error;
/*---------------------------------------------------------------------------*/
#define DEFAULT_UTILISATION_PERIOD_IN_MS (100)
/*
* rk_platform_context_of_mali_device.
*/
@ -54,21 +57,116 @@ struct rk_context {
struct device *dev;
/* is the GPU powered on? */
bool is_powered;
/* debug only, the period in ms to count gpu_utilisation. */
unsigned int utilisation_period;
};
struct rk_context *s_rk_context;
/*-------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
#ifdef CONFIG_MALI_DEVFREQ
static ssize_t utilisation_period_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct rk_context *platform = s_rk_context;
ssize_t ret = 0;
ret += snprintf(buf, PAGE_SIZE, "%u\n", platform->utilisation_period);
return ret;
}
static ssize_t utilisation_period_store(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct rk_context *platform = s_rk_context;
int ret = 0;
ret = kstrtouint(buf, 0, &platform->utilisation_period);
if (ret) {
E("invalid input period : %s.", buf);
return ret;
}
D("set utilisation_period to '%d'.", platform->utilisation_period);
return count;
}
static ssize_t utilisation_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct rk_context *platform = s_rk_context;
struct mali_device *mdev = dev_get_drvdata(dev);
ssize_t ret = 0;
unsigned long period_in_us = platform->utilisation_period * 1000;
unsigned long total_time;
unsigned long busy_time;
unsigned long utilisation;
mali_pm_reset_dvfs_utilisation(mdev);
usleep_range(period_in_us, period_in_us + 100);
mali_pm_get_dvfs_utilisation(mdev, &total_time, &busy_time);
/* 'devfreq_dev_profile' instance registered to devfreq
* also uses mali_pm_reset_dvfs_utilisation()
* and mali_pm_get_dvfs_utilisation().
* So, it's better to disable GPU DVFS before reading this node.
*/
D("total_time : %lu, busy_time : %lu.", total_time, busy_time);
utilisation = busy_time / (total_time / 100);
ret += snprintf(buf, PAGE_SIZE, "%lu\n", utilisation);
return ret;
}
static DEVICE_ATTR_RW(utilisation_period);
static DEVICE_ATTR_RO(utilisation);
#endif
static int rk_context_create_sysfs_files(struct device *dev)
{
#ifdef CONFIG_MALI_DEVFREQ
int ret;
ret = device_create_file(dev, &dev_attr_utilisation_period);
if (ret) {
E("fail to create sysfs file 'utilisation_period'.");
goto out;
}
ret = device_create_file(dev, &dev_attr_utilisation);
if (ret) {
E("fail to create sysfs file 'utilisation'.");
goto remove_utilisation_period;
}
return 0;
remove_utilisation_period:
device_remove_file(dev, &dev_attr_utilisation_period);
out:
return ret;
#else
return 0;
#endif
}
static void rk_context_remove_sysfs_files(struct device *dev)
{
#ifdef CONFIG_MALI_DEVFREQ
device_remove_file(dev, &dev_attr_utilisation_period);
device_remove_file(dev, &dev_attr_utilisation);
#endif
}
/*---------------------------------------------------------------------------*/
/*
* Init rk_platform_context of mali_device.
*/
@ -87,6 +185,8 @@ static int rk_context_init(struct platform_device *pdev)
platform->dev = dev;
platform->is_powered = false;
platform->utilisation_period = DEFAULT_UTILISATION_PERIOD_IN_MS;
ret = rk_context_create_sysfs_files(dev);
if (ret) {
E("fail to create sysfs files, ret = %d", ret);