[PATCH 1/7] drivers/perf: hisi_pcie: Introduce hisi_pcie_pmu_get_filter()

[Yicong Yang <yangyicong@huawei.com>]

From: Yicong Yang <yangyicong@hisilicon.com>

Factor out retrieving of the register value for the
corresponding event from hisi_pcie_config_filter() into a
new function hisi_pcie_pmu_get_filter() allowing future reuse.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
 drivers/perf/hisilicon/hisi_pcie_pmu.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_pcie_pmu.c b/drivers/perf/hisilicon/hisi_pcie_pmu.c
index b90ba8aca3fa..11a819cd07f2 100644
--- a/drivers/perf/hisilicon/hisi_pcie_pmu.c
+++ b/drivers/perf/hisilicon/hisi_pcie_pmu.c
@@ -216,10 +216,8 @@ static void hisi_pcie_pmu_writeq(struct hisi_pcie_pmu *pcie_pmu, u32 reg_offset,
 	writeq_relaxed(val, pcie_pmu->base + offset);
 }
 
-static void hisi_pcie_pmu_config_filter(struct perf_event *event)
+static u64 hisi_pcie_pmu_get_filter(struct perf_event *event)
 {
-	struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
-	struct hw_perf_event *hwc = &event->hw;
 	u64 port, trig_len, thr_len, len_mode;
 	u64 reg = HISI_PCIE_INIT_SET;
 
@@ -256,6 +254,15 @@ static void hisi_pcie_pmu_config_filter(struct perf_event *event)
 	else
 		reg |= FIELD_PREP(HISI_PCIE_LEN_M, HISI_PCIE_LEN_M_DEFAULT);
 
+	return reg;
+}
+
+static void hisi_pcie_pmu_config_filter(struct perf_event *event)
+{
+	struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
+	struct hw_perf_event *hwc = &event->hw;
+	u64 reg = hisi_pcie_pmu_get_filter(event);
+
 	hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, hwc->idx, reg);
 }
 
-- 
2.24.0