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PM / devfreq: exynos4: introduce struct busfreq_ppmu_data 

This is a preparation for making more PPMU code common for
EXYNOS devfreq drivers.

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2014-03-21 18:31:44 +01:00 committed by MyungJoo Ham
parent ba778b374d
commit f414527089
1 changed files with 46 additions and 28 deletions
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74
drivers/devfreq/exynos/exynos4_bus.c
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@ -75,6 +75,11 @@ struct busfreq_opp_info {
unsigned long volt;
};
struct busfreq_ppmu_data {
struct exynos_ppmu *ppmu;
int ppmu_end;
};
struct busfreq_data {
enum exynos4_busf_type type;
struct device *dev;
@ -83,7 +88,7 @@ struct busfreq_data {
struct regulator *vdd_int;
struct regulator *vdd_mif; /* Exynos4412/4212 only */
struct busfreq_opp_info curr_oppinfo;
struct exynos_ppmu ppmu[PPMU_END];
struct busfreq_ppmu_data ppmu_data;
struct notifier_block pm_notifier;
struct mutex lock;
@ -510,47 +515,47 @@ static int exynos4x12_set_busclk(struct busfreq_data *data,
return 0;
}
static void busfreq_mon_reset(struct busfreq_data *data)
static void busfreq_mon_reset(struct busfreq_ppmu_data *ppmu_data)
{
unsigned int i;
for (i = 0; i < PPMU_END; i++) {
void __iomem *ppmu_base = data->ppmu[i].hw_base;
for (i = 0; i < ppmu_data->ppmu_end; i++) {
void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
/* Reset the performance and cycle counters */
exynos_ppmu_reset(ppmu_base);
/* Setup count registers to monitor read/write transactions */
data->ppmu[i].event[PPMU_PMNCNT3] = RDWR_DATA_COUNT;
ppmu_data->ppmu[i].event[PPMU_PMNCNT3] = RDWR_DATA_COUNT;
exynos_ppmu_setevent(ppmu_base, PPMU_PMNCNT3,
data->ppmu[i].event[PPMU_PMNCNT3]);
ppmu_data->ppmu[i].event[PPMU_PMNCNT3]);
exynos_ppmu_start(ppmu_base);
}
}
static void exynos4_read_ppmu(struct busfreq_data *data)
static void exynos4_read_ppmu(struct busfreq_ppmu_data *ppmu_data)
{
int i, j;
for (i = 0; i < PPMU_END; i++) {
void __iomem *ppmu_base = data->ppmu[i].hw_base;
for (i = 0; i < ppmu_data->ppmu_end; i++) {
void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
exynos_ppmu_stop(ppmu_base);
/* Update local data from PPMU */
data->ppmu[i].ccnt = __raw_readl(ppmu_base + PPMU_CCNT);
ppmu_data->ppmu[i].ccnt = __raw_readl(ppmu_base + PPMU_CCNT);
for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
if (data->ppmu[i].event[j] == 0)
data->ppmu[i].count[j] = 0;
if (ppmu_data->ppmu[i].event[j] == 0)
ppmu_data->ppmu[i].count[j] = 0;
else
data->ppmu[i].count[j] =
ppmu_data->ppmu[i].count[j] =
exynos_ppmu_read(ppmu_base, j);
}
}
busfreq_mon_reset(data);
busfreq_mon_reset(ppmu_data);
}
static int exynos4x12_get_intspec(unsigned long mifclk)
@ -676,16 +681,16 @@ out:
return err;
}
static int exynos4_get_busier_ppmu(struct busfreq_data *data)
static int exynos4_get_busier_ppmu(struct busfreq_ppmu_data *ppmu_data)
{
int i, j;
int busy = 0;
unsigned int temp = 0;
for (i = 0; i < PPMU_END; i++) {
for (i = 0; i < ppmu_data->ppmu_end; i++) {
for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
if (data->ppmu[i].count[j] > temp) {
temp = data->ppmu[i].count[j];
if (ppmu_data->ppmu[i].count[j] > temp) {
temp = ppmu_data->ppmu[i].count[j];
busy = i;
}
}
@ -698,20 +703,21 @@ static int exynos4_bus_get_dev_status(struct device *dev,
struct devfreq_dev_status *stat)
{
struct busfreq_data *data = dev_get_drvdata(dev);
struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
int busier;
exynos4_read_ppmu(data);
busier = exynos4_get_busier_ppmu(data);
exynos4_read_ppmu(ppmu_data);
busier = exynos4_get_busier_ppmu(ppmu_data);
stat->current_frequency = data->curr_oppinfo.rate;
/* Number of cycles spent on memory access */
stat->busy_time = data->ppmu[busier].count[PPMU_PMNCNT3];
stat->busy_time = ppmu_data->ppmu[busier].count[PPMU_PMNCNT3];
stat->busy_time *= 100 / BUS_SATURATION_RATIO;
stat->total_time = data->ppmu[busier].ccnt;
stat->total_time = ppmu_data->ppmu[busier].ccnt;
/* If the counters have overflown, retry */
if (data->ppmu[busier].ccnt_overflow ||
data->ppmu[busier].count_overflow[0])
if (ppmu_data->ppmu[busier].ccnt_overflow ||
ppmu_data->ppmu[busier].count_overflow[0])
return -EAGAIN;
return 0;
@ -966,6 +972,7 @@ unlock:
static int exynos4_busfreq_probe(struct platform_device *pdev)
{
struct busfreq_data *data;
struct busfreq_ppmu_data *ppmu_data;
struct dev_pm_opp *opp;
struct device *dev = &pdev->dev;
int err = 0;
@ -976,9 +983,19 @@ static int exynos4_busfreq_probe(struct platform_device *pdev)
return -ENOMEM;
}
ppmu_data = &data->ppmu_data;
ppmu_data->ppmu_end = PPMU_END;
ppmu_data->ppmu = devm_kzalloc(dev,
sizeof(struct exynos_ppmu) * PPMU_END,
GFP_KERNEL);
if (!ppmu_data->ppmu) {
dev_err(dev, "Failed to allocate memory for exynos_ppmu\n");
return -ENOMEM;
}
data->type = pdev->id_entry->driver_data;
data->ppmu[PPMU_DMC0].hw_base = S5P_VA_DMC0;
data->ppmu[PPMU_DMC1].hw_base = S5P_VA_DMC1;
ppmu_data->ppmu[PPMU_DMC0].hw_base = S5P_VA_DMC0;
ppmu_data->ppmu[PPMU_DMC1].hw_base = S5P_VA_DMC1;
data->pm_notifier.notifier_call = exynos4_busfreq_pm_notifier_event;
data->dev = dev;
mutex_init(&data->lock);
@ -1037,7 +1054,7 @@ static int exynos4_busfreq_probe(struct platform_device *pdev)
* Start PPMU (Performance Profiling Monitoring Unit) to check
* utilization of each IP in the Exynos4 SoC.
*/
busfreq_mon_reset(data);
busfreq_mon_reset(ppmu_data);
/* Register opp_notifier for Exynos4 busfreq */
err = devfreq_register_opp_notifier(dev, data->devfreq);
@ -1081,8 +1098,9 @@ static int exynos4_busfreq_remove(struct platform_device *pdev)
static int exynos4_busfreq_resume(struct device *dev)
{
struct busfreq_data *data = dev_get_drvdata(dev);
struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
busfreq_mon_reset(data);
busfreq_mon_reset(ppmu_data);
return 0;
}
#endif