[PATCH v6 2/7] perf: imx_perf: add macro definitions for parsing config attr

From: Xu Yang <xu.yang_2@nxp.com>
To: Frank.li@nxp.com, will@kernel.org, mark.rutland@arm.com,
	robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
	conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com,
	john.g.garry@oracle.com, jolsa@kernel.org, namhyung@kernel.org,
	irogers@google.com
Cc: mike.leach@linaro.org, peterz@infradead.org, mingo@redhat.com,
	acme@kernel.org, alexander.shishkin@linux.intel.com,
	adrian.hunter@intel.com, linux-arm-kernel@lists.infradead.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-perf-users@vger.kernel.org, imx@lists.linux.dev
Subject: [PATCH v6 2/7] perf: imx_perf: add macro definitions for parsing config attr
Date: Thu,  7 Mar 2024 17:57:25 +0800	[thread overview]
Message-ID: <20240307095730.3792680-2-xu.yang_2@nxp.com> (raw)
In-Reply-To: <20240307095730.3792680-1-xu.yang_2@nxp.com>

The user can set event and counter in cmdline and the driver need to parse
it using 'config' attr value. This will add macro definitions to avoid
hard-code in driver.

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>

---
Changes in v4:
 - new patch
Changes in v5:
 - move this patch earlier
Changes in v6:
 - no changes
---
 drivers/perf/fsl_imx9_ddr_perf.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/perf/fsl_imx9_ddr_perf.c b/drivers/perf/fsl_imx9_ddr_perf.c
index 9685645bfe04..d1c566e661d8 100644
--- a/drivers/perf/fsl_imx9_ddr_perf.c
+++ b/drivers/perf/fsl_imx9_ddr_perf.c
@@ -42,6 +42,11 @@
 #define NUM_COUNTERS		11
 #define CYCLES_COUNTER		0
 
+#define CONFIG_EVENT_MASK	0x00FF
+#define CONFIG_EVENT_OFFSET	0
+#define CONFIG_COUNTER_MASK	0xFF00
+#define CONFIG_COUNTER_OFFSET	8
+
 #define to_ddr_pmu(p)		container_of(p, struct ddr_pmu, pmu)
 
 #define DDR_PERF_DEV_NAME	"imx9_ddr"
@@ -339,8 +344,10 @@ static void ddr_perf_counter_local_config(struct ddr_pmu *pmu, int config,
 				    int counter, bool enable)
 {
 	u32 ctrl_a;
+	int event;
 
 	ctrl_a = readl_relaxed(pmu->base + PMLCA(counter));
+	event = (config & CONFIG_EVENT_MASK) >> CONFIG_EVENT_OFFSET;
 
 	if (enable) {
 		ctrl_a |= PMLCA_FC;
@@ -352,7 +359,7 @@ static void ddr_perf_counter_local_config(struct ddr_pmu *pmu, int config,
 		ctrl_a &= ~PMLCA_FC;
 		ctrl_a |= PMLCA_CE;
 		ctrl_a &= ~FIELD_PREP(PMLCA_EVENT, 0x7F);
-		ctrl_a |= FIELD_PREP(PMLCA_EVENT, (config & 0x000000FF));
+		ctrl_a |= FIELD_PREP(PMLCA_EVENT, event);
 		writel(ctrl_a, pmu->base + PMLCA(counter));
 	} else {
 		/* Freeze counter. */
@@ -366,8 +373,8 @@ static void ddr_perf_monitor_config(struct ddr_pmu *pmu, int cfg, int cfg1, int
 	u32 pmcfg1, pmcfg2;
 	int event, counter;
 
-	event = cfg & 0x000000FF;
-	counter = (cfg & 0x0000FF00) >> 8;
+	event = (cfg & CONFIG_EVENT_MASK) >> CONFIG_EVENT_OFFSET;
+	counter = (cfg & CONFIG_COUNTER_MASK) >> CONFIG_COUNTER_OFFSET;
 
 	pmcfg1 = readl_relaxed(pmu->base + PMCFG1);
 
@@ -469,7 +476,7 @@ static int ddr_perf_event_add(struct perf_event *event, int flags)
 	int cfg2 = event->attr.config2;
 	int counter;
 
-	counter = (cfg & 0x0000FF00) >> 8;
+	counter = (cfg & CONFIG_COUNTER_MASK) >> CONFIG_COUNTER_OFFSET;
 
 	pmu->events[counter] = event;
 	pmu->active_events++;
-- 
2.34.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
