From: John Garry <john.garry@huawei.com>
To: <Frank.li@nxp.com>, <will@kernel.org>, <mark.rutland@arm.com>,
<robh+dt@kernel.org>, <zhangshaokun@hisilicon.com>,
<qiangqing.zhang@nxp.com>
Cc: <linuxarm@huawei.com>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <acme@kernel.org>,
<jolsa@redhat.com>, <irogers@google.com>,
John Garry <john.garry@huawei.com>
Subject: [PATCH v2 3/4] perf/imx_ddr: Add system PMU identifier for userspace
Date: Thu, 8 Oct 2020 17:26:20 +0800 [thread overview]
Message-ID: <1602149181-237415-4-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1602149181-237415-1-git-send-email-john.garry@huawei.com>
From: Joakim Zhang <qiangqing.zhang@nxp.com>
The DDR Perf for i.MX8 is a system PMU whose AXI ID would different from
SoC to SoC. Need expose system PMU identifier for userspace which refer
to /sys/bus/event_source/devices/<PMU DEVICE>/identifier.
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/perf/fsl_imx8_ddr_perf.c | 45 +++++++++++++++++++++++++++++---
1 file changed, 42 insertions(+), 3 deletions(-)
diff --git a/drivers/perf/fsl_imx8_ddr_perf.c b/drivers/perf/fsl_imx8_ddr_perf.c
index 397540a4b799..c537cd9b8142 100644
--- a/drivers/perf/fsl_imx8_ddr_perf.c
+++ b/drivers/perf/fsl_imx8_ddr_perf.c
@@ -50,21 +50,38 @@ static DEFINE_IDA(ddr_ida);
struct fsl_ddr_devtype_data {
unsigned int quirks; /* quirks needed for different DDR Perf core */
+ const char *identifier; /* system PMU identifier for userspace */
};
-static const struct fsl_ddr_devtype_data imx8_devtype_data;
+static const struct fsl_ddr_devtype_data imx8_devtype_data = {
+ .identifier = "i.MX8",
+};
+
+static const struct fsl_ddr_devtype_data imx8mq_devtype_data = {
+ .quirks = DDR_CAP_AXI_ID_FILTER,
+ .identifier = "i.MX8MQ",
+};
+
+static const struct fsl_ddr_devtype_data imx8mm_devtype_data = {
+ .quirks = DDR_CAP_AXI_ID_FILTER,
+ .identifier = "i.MX8MM",
+};
-static const struct fsl_ddr_devtype_data imx8m_devtype_data = {
+static const struct fsl_ddr_devtype_data imx8mn_devtype_data = {
.quirks = DDR_CAP_AXI_ID_FILTER,
+ .identifier = "i.MX8MN",
};
static const struct fsl_ddr_devtype_data imx8mp_devtype_data = {
.quirks = DDR_CAP_AXI_ID_FILTER_ENHANCED,
+ .identifier = "i.MX8MP",
};
static const struct of_device_id imx_ddr_pmu_dt_ids[] = {
{ .compatible = "fsl,imx8-ddr-pmu", .data = &imx8_devtype_data},
- { .compatible = "fsl,imx8m-ddr-pmu", .data = &imx8m_devtype_data},
+ { .compatible = "fsl,imx8mq-ddr-pmu", .data = &imx8mq_devtype_data},
+ { .compatible = "fsl,imx8mm-ddr-pmu", .data = &imx8mm_devtype_data},
+ { .compatible = "fsl,imx8mn-ddr-pmu", .data = &imx8mn_devtype_data},
{ .compatible = "fsl,imx8mp-ddr-pmu", .data = &imx8mp_devtype_data},
{ /* sentinel */ }
};
@@ -84,6 +101,27 @@ struct ddr_pmu {
int id;
};
+static ssize_t ddr_perf_identifier_show(struct device *dev,
+ struct device_attribute *attr,
+ char *page)
+{
+ struct ddr_pmu *pmu = dev_get_drvdata(dev);
+
+ return sprintf(page, "%s\n", pmu->devtype_data->identifier);
+}
+
+static struct device_attribute ddr_perf_identifier_attr =
+ __ATTR(identifier, 0444, ddr_perf_identifier_show, NULL);
+
+static struct attribute *ddr_perf_identifier_attrs[] = {
+ &ddr_perf_identifier_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ddr_perf_identifier_attr_group = {
+ .attrs = ddr_perf_identifier_attrs,
+};
+
enum ddr_perf_filter_capabilities {
PERF_CAP_AXI_ID_FILTER = 0,
PERF_CAP_AXI_ID_FILTER_ENHANCED,
@@ -237,6 +275,7 @@ static const struct attribute_group *attr_groups[] = {
&ddr_perf_format_attr_group,
&ddr_perf_cpumask_attr_group,
&ddr_perf_filter_cap_attr_group,
+ &ddr_perf_identifier_attr_group,
NULL,
};
--
2.26.2
next prev parent reply other threads:[~2020-10-08 9:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-08 9:26 [PATCH v2 0/4] perf drivers: Add sysfs identifier file John Garry
2020-10-08 9:26 ` [PATCH v2 1/4] drivers/perf: hisi: Add identifier sysfs file John Garry
2020-10-08 9:26 ` [PATCH v2 2/4] bindings/perf/imx-ddr: update compatible string John Garry
2020-10-12 9:58 ` Joakim Zhang
2020-10-08 9:26 ` John Garry [this message]
2020-10-08 9:26 ` [PATCH v2 4/4] perf/smmuv3: Support sysfs identifier file John Garry
2020-11-06 13:36 ` [PATCH v2 0/4] perf drivers: Add " John Garry
2020-11-25 15:44 ` Will Deacon
2020-11-25 16:00 ` John Garry
2020-11-26 1:35 ` Joakim Zhang
2020-11-26 11:35 ` John Garry
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