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    Subject[PATCH v15 0/8] Coresight: Add support for TPDM and TPDA
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    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

    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 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@0/6004000.tpda/tpda0
    tpdm0 -> ../../../devices/platform/soc@0/6c08000.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@6c08000 | |tpdm@684C000 |
    +-------|-------+ +------|------+
    | |
    +-------|-------+ |
    | funnel@6c0b000| |
    +-------|-------+ |
    | |
    +-------|-------+ |
    |funnel@6c2d000 | |
    +-------|-------+ |
    | |
    | +---------------+ |
    +----- tpda@6004000 -----------+
    +-------|-------+
    |
    +-------|-------+
    |funnel@6005000 |
    +---------------+

    This patch series depends on patch series:
    "[v5,00/14] coresight: Add new API to allocate trace source ID values"
    https://patchwork.kernel.org/project/linux-arm-kernel/cover/20221101163103.17921-1-mike.leach@linaro.org/

    "arm64: dts: qcom: sm8250: Add coresight components"
    https://patchwork.kernel.org/project/linux-arm-msm/patch/20221114091251.13939-1-quic_jinlmao@quicinc.com/

    Changes from V14:
    1. coresight-tpda: Add more comments in trace id function.
    2. qcom,coresight-tpdm.yaml: Add more comments in description.
    3. Push "arm64: dts: qcom: sm8250: Add coresight components" out this series.

    Mao Jinlong (8):
    coresight: core: Use IDR for non-cpu bound sources' paths.
    Coresight: Add coresight TPDM source driver
    dt-bindings: arm: Adds CoreSight TPDM hardware
    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 tpdm mm/prng

    .../testing/sysfs-bus-coresight-devices-tpdm | 13 +
    .../bindings/arm/qcom,coresight-tpda.yaml | 129 +++++++++
    .../bindings/arm/qcom,coresight-tpdm.yaml | 93 +++++++
    MAINTAINERS | 1 +
    arch/arm64/boot/dts/qcom/sm8250.dtsi | 173 ++++++++++++
    drivers/hwtracing/coresight/Kconfig | 23 ++
    drivers/hwtracing/coresight/Makefile | 2 +
    drivers/hwtracing/coresight/coresight-core.c | 42 ++-
    drivers/hwtracing/coresight/coresight-tpda.c | 211 ++++++++++++++
    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, 1032 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

    --
    2.17.1

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