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>

1 files changed, 46 insertions, 28 deletions

diff --git a/drivers/devfreq/exynos/exynos4_bus.c b/drivers/devfreq/exynos/exynos4_bus.c
index 228c658c0e8c..d99ef9e80517 100644
--- a/drivers/devfreq/exynos/exynos4_bus.c
+++ b/drivers/devfreq/exynos/exynos4_bus.c
@@ -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