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Message-ID: <20260db2-8c7e-e2b6-2385-74f433e4b55e@quicinc.com>
Date: Tue, 2 Aug 2022 22:43:39 +0800
From: Jinlong Mao <quic_jinlmao@...cinc.com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>,
Suzuki K Poulose <suzuki.poulose@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Konrad Dybcio <konradybcio@...il.com>,
Mike Leach <mike.leach@...aro.org>,
Andy Gross <agross@...nel.org>,
"Bjorn Andersson" <bjorn.andersson@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: Leo Yan <leo.yan@...aro.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
<coresight@...ts.linaro.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
Tingwei Zhang <quic_tingweiz@...cinc.com>,
Yuanfang Zhang <quic_yuanfang@...cinc.com>,
Tao Zhang <quic_taozha@...cinc.com>,
Trilok Soni <quic_tsoni@...cinc.com>,
Hao Zhang <quic_hazha@...cinc.com>,
<linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v12 0/9] Coresight: Add support for TPDM and TPDA
Hi Reviewers,
Please help to review V12 series of TPDM/TPDA patches.
Thanks
Jinlong Mao
On 7/21/2022 11:30 PM, Jinlong Mao wrote:
> Hi all,
>
> Please help to review V12 patches.
>
> Thanks
>
> Jinlong Mao
>
> On 7/10/2022 10:10 AM, Mao Jinlong wrote:
>> This series adds support for the trace performance monitoring and
>> diagnostics hardware (TPDM and TPDA). It is composed of two major
>> elements.
>> a) Changes for original coresight framework to support for TPDM and
>> TPDA.
>> b) Add driver code for TPDM and TPDA.
>>
>> Introduction of changes for original coresight framework
>> Support TPDM as new coresight source.
>> Since only STM and ETM are supported as coresight source originally.
>> TPDM is a newly added coresight source. We need to change
>> the original way of saving coresight path to support more types source
>> for coresight driver.
>> The following patch is to add support more coresight sources.
>> coresight: core: Use IDR for non-cpu bound sources' paths.
>>
>> Introduction of TPDM and TPDA
>> TPDM - The trace performance monitoring and diagnostics monitor or
>> TPDM in
>> short serves as data collection component for various dataset types
>> specified in the QPMDA(Qualcomm performance monitoring and diagnostics
>> architecture) spec. The primary use case of the TPDM is to collect data
>> from different data sources and send it to a TPDA for packetization,
>> timestamping and funneling.
>> Coresight: Add coresight TPDM source driver
>> dt-bindings: arm: Adds CoreSight TPDM hardware definitions
>> coresight-tpdm: Add DSB dataset support
>> coresight-tpdm: Add integration test support
>> docs: sysfs: coresight: Add sysfs ABI documentation for TPDM
>>
>> TPDA - The trace performance monitoring and diagnostics aggregator or
>> TPDA in short serves as an arbitration and packetization engine for the
>> performance monitoring and diagnostics network as specified in the QPMDA
>> (Qualcomm performance monitoring and diagnostics architecture)
>> specification. The primary use case of the TPDA is to provide
>> packetization, funneling and timestamping of Monitor data as specified
>> in the QPMDA specification.
>> The following patch is to add driver for TPDA.
>> Coresight: Add TPDA link driver
>> dt-bindings: arm: Adds CoreSight TPDA hardware definitions
>>
>> The last patch of this series is a device tree modification, which add
>> the TPDM and TPDA configuration to device tree for validating.
>> ARM: dts: msm: Add coresight components for SM8250
>> ARM: dts: msm: Add tpdm mm/prng for sm8250
>>
>> Once this series patches are applied properly, the tpdm and tpda nodes
>> should be observed at the coresight path /sys/bus/coresight/devices
>> e.g.
>> /sys/bus/coresight/devices # ls -l | grep tpd
>> tpda0 -> ../../../devices/platform/soc@...004000.tpda/tpda0
>> tpdm0 -> ../../../devices/platform/soc@...c08000.mm.tpdm/tpdm0
>>
>> We can use the commands are similar to the below to validate TPDMs.
>> Enable coresight sink first.
>>
>> echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
>> echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
>> echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
>> echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
>> The test data will be collected in the coresight sink which is enabled.
>> If rwp register of the sink is keeping updating when do
>> integration_test (by cat tmc_etf0/mgmt/rwp), it means there is data
>> generated from TPDM to sink.
>>
>> There must be a tpda between tpdm and the sink. When there are some
>> other trace event hw components in the same HW block with tpdm, tpdm
>> and these hw components will connect to the coresight funnel. When
>> there is only tpdm trace hw in the HW block, tpdm will connect to
>> tpda directly.
>> +---------------+ +-------------+
>> | tpdm@...8000 | |tpdm@...C000 |
>> +-------|-------+ +------|------+
>> | |
>> +-------|-------+ |
>> | funnel@...b000| |
>> +-------|-------+ |
>> | |
>> +-------|-------+ |
>> |funnel@...d000 | |
>> +-------|-------+ |
>> | |
>> | +---------------+ |
>> +----- tpda@...4000 -----------+
>> +-------|-------+
>> |
>> +-------|-------+
>> |funnel@...5000 |
>> +---------------+
>>
>> This patch series depends on patch series:
>> "[v2,00/13] coresight: Add new API to allocate trace source ID values"
>> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20220704081149.16797-1-mike.leach@linaro.org/
>>
>>
>> Changes from V11:
>> 1. Clear bits for atid before setting them and relese atid when tpda
>> remove. -- Suzuki K Poulose <suzuki.poulose@....com>
>>
>> Mao Jinlong (9):
>> coresight: core: Use IDR for non-cpu bound sources' paths.
>> Coresight: Add coresight TPDM source driver
>> dt-bindings: arm: Adds CoreSight TPDM hardware definitions
>> coresight-tpdm: Add DSB dataset support
>> coresight-tpdm: Add integration test support
>> Coresight: Add TPDA link driver
>> dt-bindings: arm: Adds CoreSight TPDA hardware definitions
>> arm64: dts: qcom: sm8250: Add coresight components
>> arm64: dts: qcom: sm8250: Add tpdm mm/prng
>>
>> .../testing/sysfs-bus-coresight-devices-tpdm | 13 +
>> .../bindings/arm/qcom,coresight-tpda.yaml | 111 +++
>> .../bindings/arm/qcom,coresight-tpdm.yaml | 93 +++
>> MAINTAINERS | 2 +
>> arch/arm64/boot/dts/qcom/sm8250.dtsi | 671 ++++++++++++++++++
>> drivers/hwtracing/coresight/Kconfig | 23 +
>> drivers/hwtracing/coresight/Makefile | 2 +
>> drivers/hwtracing/coresight/coresight-core.c | 42 +-
>> drivers/hwtracing/coresight/coresight-tpda.c | 208 ++++++
>> drivers/hwtracing/coresight/coresight-tpda.h | 35 +
>> drivers/hwtracing/coresight/coresight-tpdm.c | 259 +++++++
>> drivers/hwtracing/coresight/coresight-tpdm.h | 62 ++
>> include/linux/coresight.h | 1 +
>> 13 files changed, 1510 insertions(+), 12 deletions(-)
>> create mode 100644
>> Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> create mode 100644
>> Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
>> create mode 100644
>> Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
>> create mode 100644 drivers/hwtracing/coresight/coresight-tpda.c
>> create mode 100644 drivers/hwtracing/coresight/coresight-tpda.h
>> create mode 100644 drivers/hwtracing/coresight/coresight-tpdm.c
>> create mode 100644 drivers/hwtracing/coresight/coresight-tpdm.h
>>
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