[PATCH v4 1/9] drivers/perf: hisi: Remove unnecessary check of counter index

[Shaokun Zhang]

The sanity check for counter index has been done in the function
hisi_uncore_pmu_get_event_idx, so remove the redundant interface
hisi_uncore_pmu_counter_valid() and sanity check.

Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: John Garry <john.garry at huawei.com>
Cc: Jonathan Cameron <Jonathan.Cameron at huawei.com>
Co-developed-by: Qi Liu <liuqi115 at huawei.com>
Signed-off-by: Qi Liu <liuqi115 at huawei.com>
Signed-off-by: Shaokun Zhang <zhangshaokun at hisilicon.com>
---
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 20 +++-----------------
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  | 18 ++----------------
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  | 18 ++----------------
 drivers/perf/hisilicon/hisi_uncore_pmu.c      | 11 -----------
 drivers/perf/hisilicon/hisi_uncore_pmu.h      |  1 -
 5 files changed, 7 insertions(+), 61 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index ac1a8c120a00..38344b49d7af 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -65,29 +65,15 @@ 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));
 }
 
 /*
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index 3402f1a395a8..a4b8c7daefa6 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -51,29 +51,15 @@ 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,
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index 7d792435c2aa..f73be6d76abc 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -50,29 +50,15 @@ 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,
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index 9dbdc3fc3bb4..ae84a43ec991 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -96,12 +96,6 @@ static bool hisi_validate_event_group(struct perf_event *event)
 	return counters <= hisi_pmu->num_counters;
 }
 
-int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx)
-{
-	return idx >= 0 && idx < hisi_pmu->num_counters;
-}
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_counter_valid);
-
 int hisi_uncore_pmu_get_event_idx(struct perf_event *event)
 {
 	struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
@@ -131,11 +125,6 @@ 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);
-		return;
-	}
-
 	clear_bit(idx, hisi_pmu->pmu_events.used_mask);
 }
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
index 25b7cbe1f818..6a7f5491ef7d 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
@@ -78,7 +78,6 @@ struct hisi_pmu {
 	u32 identifier;
 };
 
-int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx);
 int hisi_uncore_pmu_get_event_idx(struct perf_event *event);
 void hisi_uncore_pmu_read(struct perf_event *event);
 int hisi_uncore_pmu_add(struct perf_event *event, int flags);
-- 
2.7.4