[RFC PATCH v1 2/2] perf/smmuv3: To support the dts to get options
Jay Chen
jkchen at linux.alibaba.com
Mon Jul 6 07:22:46 EDT 2020
For the smmuv3 pmu for support the dts to get the
options
Signed-off-by: Jay Chen <jkchen at linux.alibaba.com>
---
drivers/perf/arm_smmuv3_pmu.c | 42 ++++++++++++++++++++++++++++++++++-
1 file changed, 41 insertions(+), 1 deletion(-)
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index 2d09f3e47d12..44e9f4197444 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -115,6 +115,16 @@ struct smmu_pmu {
bool global_filter;
};
+struct smmu_pmu_prop {
+ u32 opt;
+ const char *prop;
+};
+
+static struct smmu_pmu_prop smmu_pmu_options[] = {
+ { SMMU_PMCG_EVCNTR_RDONLY, "hisilicon,smmu-pmcg-evcntr-rdonly"},
+ { 0, NULL},
+};
+
#define to_smmu_pmu(p) (container_of(p, struct smmu_pmu, pmu))
#define SMMU_PMU_EVENT_ATTR_EXTRACTOR(_name, _config, _start, _end) \
@@ -708,6 +718,7 @@ static void smmu_pmu_reset(struct smmu_pmu *smmu_pmu)
smmu_pmu->reloc_base + SMMU_PMCG_OVSCLR0);
}
+#ifdef CONFIG_ACPI
static void smmu_pmu_get_acpi_options(struct smmu_pmu *smmu_pmu)
{
u32 model;
@@ -723,6 +734,26 @@ static void smmu_pmu_get_acpi_options(struct smmu_pmu *smmu_pmu)
dev_notice(smmu_pmu->dev, "option mask 0x%x\n", smmu_pmu->options);
}
+#else
+static void smmu_pmu_get_acpi_options(struct smmu_pmu *smmu_pmu)
+{
+
+}
+#endif
+
+static void smmu_pmu_get_dt_options(struct smmu_pmu *smmu_pmu)
+{
+ int i = 0;
+
+ do {
+ if (of_property_read_bool(smmu_pmu->dev->of_node,
+ smmu_pmu_options[i].prop)) {
+ smmu_pmu->options |= smmu_pmu_options[i].opt;
+ dev_notice(smmu_pmu->dev, "option mask 0x%x\n",
+ smmu_pmu->options);
+ }
+ } while (smmu_pmu_options[++i].opt);
+}
static int smmu_pmu_probe(struct platform_device *pdev)
{
@@ -801,7 +832,10 @@ static int smmu_pmu_probe(struct platform_device *pdev)
return -EINVAL;
}
- smmu_pmu_get_acpi_options(smmu_pmu);
+ if (dev->of_node)
+ smmu_pmu_get_dt_options(smmu_pmu);
+ else
+ smmu_pmu_get_acpi_options(smmu_pmu);
/* Pick one CPU to be the preferred one to use */
smmu_pmu->on_cpu = raw_smp_processor_id();
@@ -855,9 +889,15 @@ static void smmu_pmu_shutdown(struct platform_device *pdev)
smmu_pmu_disable(&smmu_pmu->pmu);
}
+static const struct of_device_id smmu_pmu_of_match[] = {
+ { .compatible = "arm-smmu-v3-pmcg", },
+ { },
+};
+
static struct platform_driver smmu_pmu_driver = {
.driver = {
.name = "arm-smmu-v3-pmcg",
+ .of_match_table = smmu_pmu_of_match,
},
.probe = smmu_pmu_probe,
.remove = smmu_pmu_remove,
--
2.27.0
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