[v16,0/8] Coresight: Add support for TPDM and TPDA

  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:
"[v6,00/14] coresight: Add new API to allocate trace source ID values"
https://patchwork.kernel.org/project/linux-arm-kernel/cover/20221123195010.6859-1-mike.leach@linaro.org/

TPDM_TPDA commit tree:
https://git.codelinaro.org/clo/linux-kernel/coresight/-/commits/tpdm-tpda-v16

Changes in V16:
1. Update device tree changes to match up with device tree bindings.
3. Update the copyright year to 2023.

Changes in V15:
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. 

Changes in V14:
rebase to "[v5,00/14] coresight: Add new API to allocate trace source ID values" and latest 6.x kernel

Changes in V13:
1. Fix the conflicts when apply patches to the latest base line.

Changes in V12:
1. Clear bits for atid before setting them and relese atid when tpda
remove. -- Suzuki K Poulose <suzuki.poulose@arm.com>

Changes in V11:
1. Change dev_info to dev_dbg in TPDM/TPDA drivers. -- Suzuki K Poulose <suzuki.poulose@arm.com>
2. Merge sysfs API change of integration_test to integration_test driver
change. -- Suzuki K Poulose <suzuki.poulose@arm.com>

Changes in V10:
1. Fix the error of TPDM yaml file. -- Rob Herring <robh@kernel.org>

Changes in V9:
1. Rename yaml file for TPDM/TPDA and fix the error for the yaml files.
-- Rob Herring <robh@kernel.org>

Changes in V8:
1. Use spinlock to protect drvdata of TPDM/TPDA -- Suzuki K Poulose <suzuki.poulose@arm.com>
2. Use CORESIGHT_DEV_SUBTYPE_SOURCE_OTHERS as source type for TPDM -- Suzuki K Poulose <suzuki.poulose@arm.com>
3. Fix the warning for yaml file of TPDM/TPDA -- Rob Herring <robh@kernel.org>

Changes in V7:
1. Update the commit title and move the changes to right place which
is sorted by address for dtsi changes. -- Konrad Dybcio <konrad.dybcio@somainline.org>

Changes in V6:
1. Update maintainers in tpdm/tpda yaml file. -- Mike Leach <mike.leach@linaro.org>
2. Set the .remove function pointer in the amba_driver structure
   of tpdm/tpda driver. Add tpda_remove function for tpda driver. -- Mike Leach <mike.leach@linaro.org>
3. Define datasets of tpdm as unsigned long. -- Mike Leach <mike.leach@linaro.org>
4. Move all coresight nodes to sm8250.dtsi.
   -- Mike Leach <mike.leach@linaro.org>;Konrad Dybcio <konrad.dybcio@somainline.org>
5. Remove CORESIGHT_TPDM_INTEGRATION_TEST config. -- Mike Leach <mike.leach@linaro.org>

Changes in V5:
1. Keep the ETM source paths per-CPU and use IDR for other sources'
paths. (Suzuki K Poulose <suzuki.poulose@arm.com>)

Changes in V4:
1. Drop trace id for tpdm source as its trace atid is defined by the tpda.
Allocate tpda's atid dynamically.  (Mike Leach)

Changes in V3:
1. Use bitmap to assign the trace id. (Mathieu Poirier)

Changes in V2:
1. Use IDR to store the path of sources. (Mathieu Poirier)
2. Only add integration_test/enable/disable for TPDM. No other configs.
(Mathieu Poirier)
3. Move coresight dtsi changes to sm8250.dtsi. (Suzuki K Poulose)

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          | 164 +++++++++++
 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, 1023 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
  

On 1/6/2023 1:21 AM, Mao Jinlong wrote:
> This patch series depends on patch series:
> "[v6,00/14] coresight: Add new API to allocate trace source ID values"
> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20221123195010.6859-1-mike.leach@linaro.org/

Do we know now when these patches will get revived and accepted to 
unblock us?

---Trilok Soni
  

Hi Suzuki,

TPDM_TPDA commit tree: 
https://git.codelinaro.org/clo/linux-kernel/coresight/-/commits/tpdm-tpda-v16 


Here is our TPDM and TPDA commit tree. You can use this link to review 
patches.

Thanks

Jinlong Mao

On 1/6/2023 5:21 PM, 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
>
> 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:
> "[v6,00/14] coresight: Add new API to allocate trace source ID values"
> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20221123195010.6859-1-mike.leach@linaro.org/
>
> TPDM_TPDA commit tree:
> https://git.codelinaro.org/clo/linux-kernel/coresight/-/commits/tpdm-tpda-v16
>
> Changes in V16:
> 1. Update device tree changes to match up with device tree bindings.
> 3. Update the copyright year to 2023.
>
> Changes in V15:
> 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.
>
> Changes in V14:
> rebase to "[v5,00/14] coresight: Add new API to allocate trace source ID values" and latest 6.x kernel
>
> Changes in V13:
> 1. Fix the conflicts when apply patches to the latest base line.
>
> Changes in V12:
> 1. Clear bits for atid before setting them and relese atid when tpda
> remove. -- Suzuki K Poulose <suzuki.poulose@arm.com>
>
> Changes in V11:
> 1. Change dev_info to dev_dbg in TPDM/TPDA drivers. -- Suzuki K Poulose <suzuki.poulose@arm.com>
> 2. Merge sysfs API change of integration_test to integration_test driver
> change. -- Suzuki K Poulose <suzuki.poulose@arm.com>
>
> Changes in V10:
> 1. Fix the error of TPDM yaml file. -- Rob Herring <robh@kernel.org>
>
> Changes in V9:
> 1. Rename yaml file for TPDM/TPDA and fix the error for the yaml files.
> -- Rob Herring <robh@kernel.org>
>
> Changes in V8:
> 1. Use spinlock to protect drvdata of TPDM/TPDA -- Suzuki K Poulose <suzuki.poulose@arm.com>
> 2. Use CORESIGHT_DEV_SUBTYPE_SOURCE_OTHERS as source type for TPDM -- Suzuki K Poulose <suzuki.poulose@arm.com>
> 3. Fix the warning for yaml file of TPDM/TPDA -- Rob Herring <robh@kernel.org>
>
> Changes in V7:
> 1. Update the commit title and move the changes to right place which
> is sorted by address for dtsi changes. -- Konrad Dybcio <konrad.dybcio@somainline.org>
>
> Changes in V6:
> 1. Update maintainers in tpdm/tpda yaml file. -- Mike Leach <mike.leach@linaro.org>
> 2. Set the .remove function pointer in the amba_driver structure
>     of tpdm/tpda driver. Add tpda_remove function for tpda driver. -- Mike Leach <mike.leach@linaro.org>
> 3. Define datasets of tpdm as unsigned long. -- Mike Leach <mike.leach@linaro.org>
> 4. Move all coresight nodes to sm8250.dtsi.
>     -- Mike Leach <mike.leach@linaro.org>;Konrad Dybcio <konrad.dybcio@somainline.org>
> 5. Remove CORESIGHT_TPDM_INTEGRATION_TEST config. -- Mike Leach <mike.leach@linaro.org>
>
> Changes in V5:
> 1. Keep the ETM source paths per-CPU and use IDR for other sources'
> paths. (Suzuki K Poulose <suzuki.poulose@arm.com>)
>
> Changes in V4:
> 1. Drop trace id for tpdm source as its trace atid is defined by the tpda.
> Allocate tpda's atid dynamically.  (Mike Leach)
>
> Changes in V3:
> 1. Use bitmap to assign the trace id. (Mathieu Poirier)
>
> Changes in V2:
> 1. Use IDR to store the path of sources. (Mathieu Poirier)
> 2. Only add integration_test/enable/disable for TPDM. No other configs.
> (Mathieu Poirier)
> 3. Move coresight dtsi changes to sm8250.dtsi. (Suzuki K Poulose)
>
> 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          | 164 +++++++++++
>   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, 1023 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
>
  

On 06/01/2023 20:50, Trilok Soni wrote:
> On 1/6/2023 1:21 AM, Mao Jinlong wrote:
>> This patch series depends on patch series:
>> "[v6,00/14] coresight: Add new API to allocate trace source ID values"
>> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20221123195010.6859-1-mike.leach@linaro.org/
> 
> Do we know now when these patches will get revived and accepted to 
> unblock us?

This is all reviewed, and awaiting Peter's Ack for the perf generic
change. Once we have that, it will be pushed to coresight tree.

Suzuki
  

On 06/01/2023 09:21, 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
> 
> 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:
> "[v6,00/14] coresight: Add new API to allocate trace source ID values"
> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20221123195010.6859-1-mike.leach@linaro.org/
> 
> TPDM_TPDA commit tree:
> https://git.codelinaro.org/clo/linux-kernel/coresight/-/commits/tpdm-tpda-v16
> 

Please could you add a documentation for TPDA and TPDM under
Documentation/tracing/coresight/ ?

It need not be part of this series if you don't have to resend it.


Kind regards
Suzuki
  

On 1/10/2023 5:57 PM, Suzuki K Poulose wrote:
> On 06/01/2023 09:21, 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
>>
>> 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:
>> "[v6,00/14] coresight: Add new API to allocate trace source ID values"
>> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20221123195010.6859-1-mike.leach@linaro.org/ 
>>
>>
>> TPDM_TPDA commit tree:
>> https://git.codelinaro.org/clo/linux-kernel/coresight/-/commits/tpdm-tpda-v16 
>>
>>
>
> Please could you add a documentation for TPDA and TPDM under
> Documentation/tracing/coresight/ ?
>
> It need not be part of this series if you don't have to resend it.
>
Hi Suzuki,

Sure. I will add the documentation for TPDA and TPDM.

Could you please review patches below which don't have your reviewed by 
tag ?
If you have comments, I will update in next version along with the 
documentation for TPDA and TPDM.

Coresight: Add TPDA link driver
arm64: dts: qcom: sm8250: Add tpdm mm/prng

Thanks
Jinlong Mao
>
> Kind regards
> Suzuki
>