1758d6386SMao Jinlong.. SPDX-License-Identifier: GPL-2.0 2758d6386SMao Jinlong 3*ba0f3ae6SBagas Sanjaya================================================================= 4*ba0f3ae6SBagas SanjayaThe trace performance monitoring and diagnostics aggregator(TPDA) 5*ba0f3ae6SBagas Sanjaya================================================================= 6758d6386SMao Jinlong 7758d6386SMao Jinlong :Author: Jinlong Mao <quic_jinlmao@quicinc.com> 8758d6386SMao Jinlong :Date: January 2023 9758d6386SMao Jinlong 10758d6386SMao JinlongHardware Description 11758d6386SMao Jinlong-------------------- 12758d6386SMao Jinlong 13758d6386SMao JinlongTPDA - The trace performance monitoring and diagnostics aggregator or 14758d6386SMao JinlongTPDA in short serves as an arbitration and packetization engine for the 15758d6386SMao Jinlongperformance monitoring and diagnostics network specification. 16758d6386SMao JinlongThe primary use case of the TPDA is to provide packetization, funneling 17758d6386SMao Jinlongand timestamping of Monitor data. 18758d6386SMao Jinlong 19758d6386SMao Jinlong 20758d6386SMao JinlongSysfs files and directories 21758d6386SMao Jinlong--------------------------- 22758d6386SMao JinlongRoot: ``/sys/bus/coresight/devices/tpda<N>`` 23758d6386SMao Jinlong 24758d6386SMao JinlongConfig details 25758d6386SMao Jinlong--------------------------- 26758d6386SMao Jinlong 27758d6386SMao JinlongThe tpdm and tpda nodes should be observed at the coresight path 28758d6386SMao Jinlong"/sys/bus/coresight/devices". 29758d6386SMao Jinlonge.g. 30758d6386SMao Jinlong/sys/bus/coresight/devices # ls -l | grep tpd 31758d6386SMao Jinlongtpda0 -> ../../../devices/platform/soc@0/6004000.tpda/tpda0 32758d6386SMao Jinlongtpdm0 -> ../../../devices/platform/soc@0/6c08000.mm.tpdm/tpdm0 33758d6386SMao Jinlong 34758d6386SMao JinlongWe can use the commands are similar to the below to validate TPDMs. 35758d6386SMao JinlongEnable coresight sink first. The port of tpda which is connected to 36758d6386SMao Jinlongthe tpdm will be enabled after commands below. 37758d6386SMao Jinlong 38758d6386SMao Jinlongecho 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink 39758d6386SMao Jinlongecho 1 > /sys/bus/coresight/devices/tpdm0/enable_source 40758d6386SMao Jinlongecho 1 > /sys/bus/coresight/devices/tpdm0/integration_test 41758d6386SMao Jinlongecho 2 > /sys/bus/coresight/devices/tpdm0/integration_test 42758d6386SMao Jinlong 43758d6386SMao JinlongThe test data will be collected in the coresight sink which is enabled. 44758d6386SMao JinlongIf rwp register of the sink is keeping updating when do 45758d6386SMao Jinlongintegration_test (by cat tmc_etf0/mgmt/rwp), it means there is data 46758d6386SMao Jinlonggenerated from TPDM to sink. 47758d6386SMao Jinlong 48758d6386SMao JinlongThere must be a tpda between tpdm and the sink. When there are some 49758d6386SMao Jinlongother trace event hw components in the same HW block with tpdm, tpdm 50758d6386SMao Jinlongand these hw components will connect to the coresight funnel. When 51758d6386SMao Jinlongthere is only tpdm trace hw in the HW block, tpdm will connect to 52758d6386SMao Jinlongtpda directly. 53