linux-kernel - [PATCH v2 0/4] perf/dwc_pcie: Fix registration issue in multi PCIe controller instances

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Message-ID: <20240816-dwc_pmu_fix-v2-0-198b8ab1077c@quicinc.com>
Date: Fri, 16 Aug 2024 20:47:19 +0530
From: Krishna chaitanya chundru <quic_krichai@...cinc.com>
To: Shuai Xue <xueshuai@...ux.alibaba.com>,
        Jing Zhang
	<renyu.zj@...ux.alibaba.com>,
        Will Deacon <will@...nel.org>, Mark Rutland
	<mark.rutland@....com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        "Yicong
 Yang" <yangyicong@...ilicon.com>,
        Jonathan Cameron
	<Jonathan.Cameron@...wei.com>,
        Jonathan Corbet <corbet@....net>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <quic_vbadigan@...cinc.com>, <quic_nitegupt@...cinc.com>,
        <quic_skananth@...cinc.com>, <quic_ramkri@...cinc.com>,
        <quic_parass@...cinc.com>, <quic_mrana@...cinc.com>,
        "Krishna chaitanya
 chundru" <quic_krichai@...cinc.com>
Subject: [PATCH v2 0/4] perf/dwc_pcie: Fix registration issue in multi PCIe
 controller instances

When there are multiple of instances of PCIe controllers, registration
to perf driver fails with this error. This is because of having same
bdf value for devices under two different controllers.

Update the logic to use sbdf which is a unique number in case of
multi instance also.

When the PCIe devices are discovered late, the driver can't find
the PCIe devices and returns in the init without registering with
the bus notifier. Due to that the devices which are discovered late
the driver can't register for this.

Register for bus notifier & driver even if the device is not found in init.

Update the vendor table with QCOM PCIe vendorid to support QCOM devices.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@...cinc.com>
---
Changes in v2:
- Use platform dev id for instead of encoding again (Yicong Yang).
- Register for driver always along with bus notifier(Yicong Yang).
- Link to v1: https://lore.kernel.org/r/20240731-dwc_pmu_fix-v1-0-ca47d153e5b2@quicinc.com

---
Krishna chaitanya chundru (4):
      perf/dwc_pcie: Fix registration issue in multi PCIe controller instances
      Documentation: dwc_pcie_pmu: Update bdf to sbdf
      perf/dwc_pcie: Always register for PCIe bus notifier
      perf/dwc_pcie: Add support for QCOM vendor devices

 Documentation/admin-guide/perf/dwc_pcie_pmu.rst | 16 ++++++++--------
 drivers/perf/dwc_pcie_pmu.c                     | 22 +++++++++-------------
 2 files changed, 17 insertions(+), 21 deletions(-)
---
base-commit: b236787b0da563e3bad0dab1b4b9a5bb54eabd39
change-id: 20240731-dwc_pmu_fix-3729bd3657fe
prerequisite-change-id: 20240728-mhi_runtime_pm-2383b74c71ed:v1
prerequisite-patch-id: 90e73ba7ee4538c67f21f7f23ae4d931cb6e9967

Best regards,
-- 
Krishna chaitanya chundru <quic_krichai@...cinc.com>