[1/8] drivers/perf: hisi: Refactor code for more uncore PMUs

Commit Message

Shaokun Zhang Dec. 31, 2020, 6:19 a.m. UTC

On HiSilicon uncore PMU drivers, interrupt handling function and interrupt
registration function are very similar in differents PMU modules. Let's
refactor the frame, use a callback function for the HW accessors.

Cc: Mark Rutland <[e-mail]>
Cc: Will Deacon <[e-mail]>
Cc: John Garry <[e-mail]>
Cc: Jonathan Cameron <[e-mail]>
Reviewed-by: John Garry <[e-mail]>
Co-developed-by: Qi Liu <[e-mail]>
Signed-off-by: Qi Liu <[e-mail]>
Signed-off-by: Shaokun Zhang <[e-mail]>
---
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 79 ++++-----------------------
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  | 77 +++-----------------------
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  | 77 +++-----------------------
 drivers/perf/hisilicon/hisi_uncore_pmu.c      | 68 ++++++++++++++++++++++-
 drivers/perf/hisilicon/hisi_uncore_pmu.h      |  6 +-
 5 files changed, 100 insertions(+), 207 deletions(-)

Patch

diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index 5ac6c9113767..69ccbe02f1e3 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -14,7 +14,6 @@ 
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/list.h>
-#include <linux/platform_device.h>
 #include <linux/smp.h>
 
 #include "hisi_uncore_pmu.h"
@@ -65,29 +64,15 @@  static u32 hisi_ddrc_pmu_get_counter_offset(int cntr_idx)
 static u64 hisi_ddrc_pmu_read_counter(struct hisi_pmu *ddrc_pmu,
 				      struct hw_perf_event *hwc)
 {
-	/* Use event code as counter index */
-	u32 idx = GET_DDRC_EVENTID(hwc);
-
-	if (!hisi_uncore_pmu_counter_valid(ddrc_pmu, idx)) {
-		dev_err(ddrc_pmu->dev, "Unsupported event index:%d!\n", idx);
-		return 0;
-	}
-
-	return readl(ddrc_pmu->base + hisi_ddrc_pmu_get_counter_offset(idx));
+	return readl(ddrc_pmu->base +
+		     hisi_ddrc_pmu_get_counter_offset(hwc->idx));
 }
 
 static void hisi_ddrc_pmu_write_counter(struct hisi_pmu *ddrc_pmu,
 					struct hw_perf_event *hwc, u64 val)
 {
-	u32 idx = GET_DDRC_EVENTID(hwc);
-
-	if (!hisi_uncore_pmu_counter_valid(ddrc_pmu, idx)) {
-		dev_err(ddrc_pmu->dev, "Unsupported event index:%d!\n", idx);
-		return;
-	}
-
 	writel((u32)val,
-	       ddrc_pmu->base + hisi_ddrc_pmu_get_counter_offset(idx));
+	       ddrc_pmu->base + hisi_ddrc_pmu_get_counter_offset(hwc->idx));
 }
 
 /*
@@ -179,60 +164,14 @@  static void hisi_ddrc_pmu_disable_counter_int(struct hisi_pmu *ddrc_pmu,
 	writel(val, ddrc_pmu->base + DDRC_INT_MASK);
 }
 
-static irqreturn_t hisi_ddrc_pmu_isr(int irq, void *dev_id)
+static u32 hisi_ddrc_pmu_get_int_status(struct hisi_pmu *ddrc_pmu)
 {
-	struct hisi_pmu *ddrc_pmu = dev_id;
-	struct perf_event *event;
-	unsigned long overflown;
-	int idx;
-
-	/* Read the DDRC_INT_STATUS register */
-	overflown = readl(ddrc_pmu->base + DDRC_INT_STATUS);
-	if (!overflown)
-		return IRQ_NONE;
-
-	/*
-	 * Find the counter index which overflowed if the bit was set
-	 * and handle it
-	 */
-	for_each_set_bit(idx, &overflown, DDRC_NR_COUNTERS) {
-		/* Write 1 to clear the IRQ status flag */
-		writel((1 << idx), ddrc_pmu->base + DDRC_INT_CLEAR);
-
-		/* Get the corresponding event struct */
-		event = ddrc_pmu->pmu_events.hw_events[idx];
-		if (!event)
-			continue;
-
-		hisi_uncore_pmu_event_update(event);
-		hisi_uncore_pmu_set_event_period(event);
-	}
-
-	return IRQ_HANDLED;
+	return readl(ddrc_pmu->base + DDRC_INT_STATUS);
 }
 
-static int hisi_ddrc_pmu_init_irq(struct hisi_pmu *ddrc_pmu,
-				  struct platform_device *pdev)
+static void hisi_ddrc_pmu_clear_int_status(struct hisi_pmu *ddrc_pmu, int idx)
 {
-	int irq, ret;
-
-	/* Read and init IRQ */
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
-
-	ret = devm_request_irq(&pdev->dev, irq, hisi_ddrc_pmu_isr,
-			       IRQF_NOBALANCING | IRQF_NO_THREAD,
-			       dev_name(&pdev->dev), ddrc_pmu);
-	if (ret < 0) {
-		dev_err(&pdev->dev,
-			"Fail to request IRQ:%d ret:%d\n", irq, ret);
-		return ret;
-	}
-
-	ddrc_pmu->irq = irq;
-
-	return 0;
+	writel(1 << idx, ddrc_pmu->base + DDRC_INT_CLEAR);
 }
 
 static const struct acpi_device_id hisi_ddrc_pmu_acpi_match[] = {
@@ -342,6 +281,8 @@  static const struct hisi_uncore_ops hisi_uncore_ddrc_ops = {
 	.disable_counter_int	= hisi_ddrc_pmu_disable_counter_int,
 	.write_counter		= hisi_ddrc_pmu_write_counter,
 	.read_counter		= hisi_ddrc_pmu_read_counter,
+	.get_int_status		= hisi_ddrc_pmu_get_int_status,
+	.clear_int_status	= hisi_ddrc_pmu_clear_int_status,
 };
 
 static int hisi_ddrc_pmu_dev_probe(struct platform_device *pdev,
@@ -353,7 +294,7 @@  static int hisi_ddrc_pmu_dev_probe(struct platform_device *pdev,
 	if (ret)
 		return ret;
 
-	ret = hisi_ddrc_pmu_init_irq(ddrc_pmu, pdev);
+	ret = hisi_uncore_pmu_init_irq(ddrc_pmu, pdev);
 	if (ret)
 		return ret;
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index 41b2dceb5f26..29c26f2e3c08 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -14,7 +14,6 @@ 
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/list.h>
-#include <linux/platform_device.h>
 #include <linux/smp.h>
 
 #include "hisi_uncore_pmu.h"
@@ -51,29 +50,15 @@  static u32 hisi_hha_pmu_get_counter_offset(int cntr_idx)
 static u64 hisi_hha_pmu_read_counter(struct hisi_pmu *hha_pmu,
 				     struct hw_perf_event *hwc)
 {
-	u32 idx = hwc->idx;
-
-	if (!hisi_uncore_pmu_counter_valid(hha_pmu, idx)) {
-		dev_err(hha_pmu->dev, "Unsupported event index:%d!\n", idx);
-		return 0;
-	}
-
 	/* Read 64 bits and like L3C, top 16 bits are RAZ */
-	return readq(hha_pmu->base + hisi_hha_pmu_get_counter_offset(idx));
+	return readq(hha_pmu->base + hisi_hha_pmu_get_counter_offset(hwc->idx));
 }
 
 static void hisi_hha_pmu_write_counter(struct hisi_pmu *hha_pmu,
 				       struct hw_perf_event *hwc, u64 val)
 {
-	u32 idx = hwc->idx;
-
-	if (!hisi_uncore_pmu_counter_valid(hha_pmu, idx)) {
-		dev_err(hha_pmu->dev, "Unsupported event index:%d!\n", idx);
-		return;
-	}
-
 	/* Write 64 bits and like L3C, top 16 bits are WI */
-	writeq(val, hha_pmu->base + hisi_hha_pmu_get_counter_offset(idx));
+	writeq(val, hha_pmu->base + hisi_hha_pmu_get_counter_offset(hwc->idx));
 }
 
 static void hisi_hha_pmu_write_evtype(struct hisi_pmu *hha_pmu, int idx,
@@ -169,60 +154,14 @@  static void hisi_hha_pmu_disable_counter_int(struct hisi_pmu *hha_pmu,
 	writel(val, hha_pmu->base + HHA_INT_MASK);
 }
 
-static irqreturn_t hisi_hha_pmu_isr(int irq, void *dev_id)
+static u32 hisi_hha_pmu_get_int_status(struct hisi_pmu *hha_pmu)
 {
-	struct hisi_pmu *hha_pmu = dev_id;
-	struct perf_event *event;
-	unsigned long overflown;
-	int idx;
-
-	/* Read HHA_INT_STATUS register */
-	overflown = readl(hha_pmu->base + HHA_INT_STATUS);
-	if (!overflown)
-		return IRQ_NONE;
-
-	/*
-	 * Find the counter index which overflowed if the bit was set
-	 * and handle it
-	 */
-	for_each_set_bit(idx, &overflown, HHA_NR_COUNTERS) {
-		/* Write 1 to clear the IRQ status flag */
-		writel((1 << idx), hha_pmu->base + HHA_INT_CLEAR);
-
-		/* Get the corresponding event struct */
-		event = hha_pmu->pmu_events.hw_events[idx];
-		if (!event)
-			continue;
-
-		hisi_uncore_pmu_event_update(event);
-		hisi_uncore_pmu_set_event_period(event);
-	}
-
-	return IRQ_HANDLED;
+	return readl(hha_pmu->base + HHA_INT_STATUS);
 }
 
-static int hisi_hha_pmu_init_irq(struct hisi_pmu *hha_pmu,
-				 struct platform_device *pdev)
+static void hisi_hha_pmu_clear_int_status(struct hisi_pmu *hha_pmu, int idx)
 {
-	int irq, ret;
-
-	/* Read and init IRQ */
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
-
-	ret = devm_request_irq(&pdev->dev, irq, hisi_hha_pmu_isr,
-			      IRQF_NOBALANCING | IRQF_NO_THREAD,
-			      dev_name(&pdev->dev), hha_pmu);
-	if (ret < 0) {
-		dev_err(&pdev->dev,
-			"Fail to request IRQ:%d ret:%d\n", irq, ret);
-		return ret;
-	}
-
-	hha_pmu->irq = irq;
-
-	return 0;
+	writel(1 << idx, hha_pmu->base + HHA_INT_CLEAR);
 }
 
 static const struct acpi_device_id hisi_hha_pmu_acpi_match[] = {
@@ -354,6 +293,8 @@  static const struct hisi_uncore_ops hisi_uncore_hha_ops = {
 	.disable_counter_int	= hisi_hha_pmu_disable_counter_int,
 	.write_counter		= hisi_hha_pmu_write_counter,
 	.read_counter		= hisi_hha_pmu_read_counter,
+	.get_int_status		= hisi_hha_pmu_get_int_status,
+	.clear_int_status	= hisi_hha_pmu_clear_int_status,
 };
 
 static int hisi_hha_pmu_dev_probe(struct platform_device *pdev,
@@ -365,7 +306,7 @@  static int hisi_hha_pmu_dev_probe(struct platform_device *pdev,
 	if (ret)
 		return ret;
 
-	ret = hisi_hha_pmu_init_irq(hha_pmu, pdev);
+	ret = hisi_uncore_pmu_init_irq(hha_pmu, pdev);
 	if (ret)
 		return ret;
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index 705501d18d03..68c00689b275 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -14,7 +14,6 @@ 
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/list.h>
-#include <linux/platform_device.h>
 #include <linux/smp.h>
 
 #include "hisi_uncore_pmu.h"
@@ -50,29 +49,15 @@  static u32 hisi_l3c_pmu_get_counter_offset(int cntr_idx)
 static u64 hisi_l3c_pmu_read_counter(struct hisi_pmu *l3c_pmu,
 				     struct hw_perf_event *hwc)
 {
-	u32 idx = hwc->idx;
-
-	if (!hisi_uncore_pmu_counter_valid(l3c_pmu, idx)) {
-		dev_err(l3c_pmu->dev, "Unsupported event index:%d!\n", idx);
-		return 0;
-	}
-
 	/* Read 64-bits and the upper 16 bits are RAZ */
-	return readq(l3c_pmu->base + hisi_l3c_pmu_get_counter_offset(idx));
+	return readq(l3c_pmu->base + hisi_l3c_pmu_get_counter_offset(hwc->idx));
 }
 
 static void hisi_l3c_pmu_write_counter(struct hisi_pmu *l3c_pmu,
 				       struct hw_perf_event *hwc, u64 val)
 {
-	u32 idx = hwc->idx;
-
-	if (!hisi_uncore_pmu_counter_valid(l3c_pmu, idx)) {
-		dev_err(l3c_pmu->dev, "Unsupported event index:%d!\n", idx);
-		return;
-	}
-
 	/* Write 64-bits and the upper 16 bits are WI */
-	writeq(val, l3c_pmu->base + hisi_l3c_pmu_get_counter_offset(idx));
+	writeq(val, l3c_pmu->base + hisi_l3c_pmu_get_counter_offset(hwc->idx));
 }
 
 static void hisi_l3c_pmu_write_evtype(struct hisi_pmu *l3c_pmu, int idx,
@@ -168,60 +153,14 @@  static void hisi_l3c_pmu_disable_counter_int(struct hisi_pmu *l3c_pmu,
 	writel(val, l3c_pmu->base + L3C_INT_MASK);
 }
 
-static irqreturn_t hisi_l3c_pmu_isr(int irq, void *dev_id)
+static u32 hisi_l3c_pmu_get_int_status(struct hisi_pmu *l3c_pmu)
 {
-	struct hisi_pmu *l3c_pmu = dev_id;
-	struct perf_event *event;
-	unsigned long overflown;
-	int idx;
-
-	/* Read L3C_INT_STATUS register */
-	overflown = readl(l3c_pmu->base + L3C_INT_STATUS);
-	if (!overflown)
-		return IRQ_NONE;
-
-	/*
-	 * Find the counter index which overflowed if the bit was set
-	 * and handle it.
-	 */
-	for_each_set_bit(idx, &overflown, L3C_NR_COUNTERS) {
-		/* Write 1 to clear the IRQ status flag */
-		writel((1 << idx), l3c_pmu->base + L3C_INT_CLEAR);
-
-		/* Get the corresponding event struct */
-		event = l3c_pmu->pmu_events.hw_events[idx];
-		if (!event)
-			continue;
-
-		hisi_uncore_pmu_event_update(event);
-		hisi_uncore_pmu_set_event_period(event);
-	}
-
-	return IRQ_HANDLED;
+	return readl(l3c_pmu->base + L3C_INT_STATUS);
 }
 
-static int hisi_l3c_pmu_init_irq(struct hisi_pmu *l3c_pmu,
-				 struct platform_device *pdev)
+static void hisi_l3c_pmu_clear_int_status(struct hisi_pmu *l3c_pmu, int idx)
 {
-	int irq, ret;
-
-	/* Read and init IRQ */
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
-
-	ret = devm_request_irq(&pdev->dev, irq, hisi_l3c_pmu_isr,
-			       IRQF_NOBALANCING | IRQF_NO_THREAD,
-			       dev_name(&pdev->dev), l3c_pmu);
-	if (ret < 0) {
-		dev_err(&pdev->dev,
-			"Fail to request IRQ:%d ret:%d\n", irq, ret);
-		return ret;
-	}
-
-	l3c_pmu->irq = irq;
-
-	return 0;
+	writel(1 << idx, l3c_pmu->base + L3C_INT_CLEAR);
 }
 
 static const struct acpi_device_id hisi_l3c_pmu_acpi_match[] = {
@@ -344,6 +283,8 @@  static const struct hisi_uncore_ops hisi_uncore_l3c_ops = {
 	.disable_counter_int	= hisi_l3c_pmu_disable_counter_int,
 	.write_counter		= hisi_l3c_pmu_write_counter,
 	.read_counter		= hisi_l3c_pmu_read_counter,
+	.get_int_status		= hisi_l3c_pmu_get_int_status,
+	.clear_int_status	= hisi_l3c_pmu_clear_int_status,
 };
 
 static int hisi_l3c_pmu_dev_probe(struct platform_device *pdev,
@@ -355,7 +296,7 @@  static int hisi_l3c_pmu_dev_probe(struct platform_device *pdev,
 	if (ret)
 		return ret;
 
-	ret = hisi_l3c_pmu_init_irq(l3c_pmu, pdev);
+	ret = hisi_uncore_pmu_init_irq(l3c_pmu, pdev);
 	if (ret)
 		return ret;
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index 9dbdc3fc3bb4..82a4ff2bc3ae 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -132,13 +132,67 @@  EXPORT_SYMBOL_GPL(hisi_uncore_pmu_identifier_attr_show);
 static void hisi_uncore_pmu_clear_event_idx(struct hisi_pmu *hisi_pmu, int idx)
 {
 	if (!hisi_uncore_pmu_counter_valid(hisi_pmu, idx)) {
-		dev_err(hisi_pmu->dev, "Unsupported event index:%d!\n", idx);
+		dev_err(hisi_pmu->dev, "Unsupported event index: %d\n", idx);
 		return;
 	}
 
 	clear_bit(idx, hisi_pmu->pmu_events.used_mask);
 }
 
+static irqreturn_t hisi_uncore_pmu_isr(int irq, void *data)
+{
+	struct hisi_pmu *hisi_pmu = data;
+	struct perf_event *event;
+	unsigned long overflown;
+	int idx;
+
+	overflown = hisi_pmu->ops->get_int_status(hisi_pmu);
+	if (!overflown)
+		return IRQ_NONE;
+
+	/*
+	 * Find the counter index which overflowed if the bit was set
+	 * and handle it.
+	 */
+	for_each_set_bit(idx, &overflown, hisi_pmu->num_counters) {
+		/* Write 1 to clear the IRQ status flag */
+		hisi_pmu->ops->clear_int_status(hisi_pmu, idx);
+		/* Get the corresponding event struct */
+		event = hisi_pmu->pmu_events.hw_events[idx];
+		if (!event)
+			continue;
+
+		hisi_uncore_pmu_event_update(event);
+		hisi_uncore_pmu_set_event_period(event);
+	}
+
+	return IRQ_HANDLED;
+}
+
+int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu,
+			     struct platform_device *pdev)
+{
+	int irq, ret;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ret = devm_request_irq(&pdev->dev, irq, hisi_uncore_pmu_isr,
+			       IRQF_NOBALANCING | IRQF_NO_THREAD,
+			       dev_name(&pdev->dev), hisi_pmu);
+	if (ret < 0) {
+		dev_err(&pdev->dev,
+			"Fail to request IRQ:%d ret:%d\n", irq, ret);
+		return ret;
+	}
+
+	hisi_pmu->irq = irq;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(hisi_uncore_pmu_init_irq);
+
 int hisi_uncore_pmu_event_init(struct perf_event *event)
 {
 	struct hw_perf_event *hwc = &event->hw;
@@ -243,6 +297,12 @@  void hisi_uncore_pmu_event_update(struct perf_event *event)
 	struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
 	struct hw_perf_event *hwc = &event->hw;
 	u64 delta, prev_raw_count, new_raw_count;
+	u32 idx = hwc->idx;
+
+	if (!hisi_uncore_pmu_counter_valid(hisi_pmu, idx)) {
+		dev_err(hisi_pmu->dev, "Unsupported counter index: %d\n", idx);
+		return;
+	}
 
 	do {
 		/* Read the count from the counter register */
@@ -263,10 +323,16 @@  void hisi_uncore_pmu_start(struct perf_event *event, int flags)
 {
 	struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
 	struct hw_perf_event *hwc = &event->hw;
+	u32 idx = hwc->idx;
 
 	if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
 		return;
 
+	if (!hisi_uncore_pmu_counter_valid(hisi_pmu, idx)) {
+		dev_err(hisi_pmu->dev, "Unsupported counter index: %d.\n", idx);
+		return;
+	}
+
 	WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
 	hwc->state = 0;
 	hisi_uncore_pmu_set_event_period(event);
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
index 25b7cbe1f818..aaaf637cc9ea 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
@@ -16,6 +16,7 @@ 
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/perf_event.h>
+#include <linux/platform_device.h>
 #include <linux/types.h>
 
 #undef pr_fmt
@@ -47,6 +48,8 @@  struct hisi_uncore_ops {
 	void (*disable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
 	void (*start_counters)(struct hisi_pmu *);
 	void (*stop_counters)(struct hisi_pmu *);
+	u32 (*get_int_status)(struct hisi_pmu *hisi_pmu);
+	void (*clear_int_status)(struct hisi_pmu *hisi_pmu, int idx);
 };
 
 struct hisi_pmu_hwevents {
@@ -102,6 +105,7 @@  int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node);
 ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
 					     struct device_attribute *attr,
 					     char *page);
-
+int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu,
+			     struct platform_device *pdev);
 
 #endif /* __HISI_UNCORE_PMU_H__ */