perf/imx_ddr: Dump AXI ID filter info to userspace (f1d303a1) · Commits · 戴 / test

drivers/perf/fsl_imx8_ddr_perf.c

+56 −0

Original line number	Diff line number	Diff line
		@@ -84,6 +84,61 @@ struct ddr_pmu {
		int id;
		};

		enum ddr_perf_filter_capabilities {
		PERF_CAP_AXI_ID_FILTER = 0,
		PERF_CAP_AXI_ID_FILTER_ENHANCED,
		PERF_CAP_AXI_ID_FEAT_MAX,
		};

		static u32 ddr_perf_filter_cap_get(struct ddr_pmu *pmu, int cap)
		{
		u32 quirks = pmu->devtype_data->quirks;

		switch (cap) {
		case PERF_CAP_AXI_ID_FILTER:
		return !!(quirks & DDR_CAP_AXI_ID_FILTER);
		case PERF_CAP_AXI_ID_FILTER_ENHANCED:
		quirks &= DDR_CAP_AXI_ID_FILTER_ENHANCED;
		return quirks == DDR_CAP_AXI_ID_FILTER_ENHANCED;
		default:
		WARN(1, "unknown filter cap %d\n", cap);
		}

		return 0;
		}

		static ssize_t ddr_perf_filter_cap_show(struct device *dev,
		struct device_attribute *attr,
		char *buf)
		{
		struct ddr_pmu *pmu = dev_get_drvdata(dev);
		struct dev_ext_attribute *ea =
		container_of(attr, struct dev_ext_attribute, attr);
		int cap = (long)ea->var;

		return snprintf(buf, PAGE_SIZE, "%u\n",
		ddr_perf_filter_cap_get(pmu, cap));
		}

		#define PERF_EXT_ATTR_ENTRY(_name, _func, _var) \
		(&((struct dev_ext_attribute) { \
		__ATTR(_name, 0444, _func, NULL), (void *)_var \
		}).attr.attr)

		#define PERF_FILTER_EXT_ATTR_ENTRY(_name, _var) \
		PERF_EXT_ATTR_ENTRY(_name, ddr_perf_filter_cap_show, _var)

		static struct attribute *ddr_perf_filter_cap_attr[] = {
		PERF_FILTER_EXT_ATTR_ENTRY(filter, PERF_CAP_AXI_ID_FILTER),
		PERF_FILTER_EXT_ATTR_ENTRY(enhanced_filter, PERF_CAP_AXI_ID_FILTER_ENHANCED),
		NULL,
		};

		static struct attribute_group ddr_perf_filter_cap_attr_group = {
		.name = "caps",
		.attrs = ddr_perf_filter_cap_attr,
		};

		static ssize_t ddr_perf_cpumask_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		@@ -181,6 +236,7 @@ static const struct attribute_group *attr_groups[] = {
		&ddr_perf_events_attr_group,
		&ddr_perf_format_attr_group,
		&ddr_perf_cpumask_attr_group,
		&ddr_perf_filter_cap_attr_group,
		NULL,
		};

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