diff mbox series

[3/3] drivers/perf: hisi_pcie: Export supported Root Ports [bdf_min, bdf_max]

Message ID 20240829090332.28756-4-yangyicong@huawei.com (mailing list archive)
State New, archived
Headers show
Series Some updates for HiSilicon PCIe PMU | expand

Commit Message

Yicong Yang Aug. 29, 2024, 9:03 a.m. UTC 
From: Yicong Yang <yangyicong@hisilicon.com>

Currently users can get the Root Ports supported by the PCIe PMU by
"bus" sysfs attributes which indicates the PCIe bus number where
Root Ports are located. This maybe insufficient since Root Ports
supported by different PCIe PMUs may be located on the same PCIe bus.
So export the BDF range the Root Ports additionally.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
 .../admin-guide/perf/hisi-pcie-pmu.rst         |  4 +++-
 drivers/perf/hisilicon/hisi_pcie_pmu.c         | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

Comments

Jonathan Cameron Aug. 29, 2024, 1:43 p.m. UTC | #1 
On Thu, 29 Aug 2024 17:03:32 +0800
Yicong Yang <yangyicong@huawei.com> wrote:

> From: Yicong Yang <yangyicong@hisilicon.com>
> 
> Currently users can get the Root Ports supported by the PCIe PMU by
> "bus" sysfs attributes which indicates the PCIe bus number where
> Root Ports are located. This maybe insufficient since Root Ports
> supported by different PCIe PMUs may be located on the same PCIe bus.
> So export the BDF range the Root Ports additionally.
> 
> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff mbox series

Patch

diff --git a/Documentation/admin-guide/perf/hisi-pcie-pmu.rst b/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
index 5541ff40e06a..083ca50de896 100644
--- a/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
+++ b/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
@@ -28,7 +28,9 @@  The "identifier" sysfs file allows users to identify the version of the
 PMU hardware device.
 
 The "bus" sysfs file allows users to get the bus number of Root Ports
-monitored by PMU.
+monitored by PMU. Furthermore users can get the Root Ports range in
+[bdf_min, bdf_max] from "bdf_min" and "bdf_max" sysfs attributes
+respectively.
 
 Example usage of perf::
 
diff --git a/drivers/perf/hisilicon/hisi_pcie_pmu.c b/drivers/perf/hisilicon/hisi_pcie_pmu.c
index f7d6c59d9930..c5394d007b61 100644
--- a/drivers/perf/hisilicon/hisi_pcie_pmu.c
+++ b/drivers/perf/hisilicon/hisi_pcie_pmu.c
@@ -141,6 +141,22 @@  static ssize_t bus_show(struct device *dev, struct device_attribute *attr, char
 }
 static DEVICE_ATTR_RO(bus);
 
+static ssize_t bdf_min_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(dev_get_drvdata(dev));
+
+	return sysfs_emit(buf, "%#04x\n", pcie_pmu->bdf_min);
+}
+static DEVICE_ATTR_RO(bdf_min);
+
+static ssize_t bdf_max_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(dev_get_drvdata(dev));
+
+	return sysfs_emit(buf, "%#04x\n", pcie_pmu->bdf_max);
+}
+static DEVICE_ATTR_RO(bdf_max);
+
 static struct hisi_pcie_reg_pair
 hisi_pcie_parse_reg_value(struct hisi_pcie_pmu *pcie_pmu, u32 reg_off)
 {
@@ -763,6 +779,8 @@  static const struct attribute_group hisi_pcie_pmu_format_group = {
 
 static struct attribute *hisi_pcie_pmu_bus_attrs[] = {
 	&dev_attr_bus.attr,
+	&dev_attr_bdf_max.attr,
+	&dev_attr_bdf_min.attr,
 	NULL
 };