Hi Greg, Since the kernel side of this device has been reviewed for 8 versions with all comments addressed and no more comment since v9 posted in 5.19-rc1, is it ok to merge it first (for Patch 1-3 and 7-8)? Thanks. On 2022/6/6 19:55, Yicong Yang wrote: > HiSilicon PCIe tune and trace device (PTT) is a PCIe Root Complex > integrated Endpoint (RCiEP) device, providing the capability > to dynamically monitor and tune the PCIe traffic (tune), > and trace the TLP headers (trace). > > PTT tune is designed for monitoring and adjusting PCIe link parameters. > We provide several parameters of the PCIe link. Through the driver, > user can adjust the value of certain parameter to affect the PCIe link > for the purpose of enhancing the performance in certian situation. > > PTT trace is designed for dumping the TLP headers to the memory, which > can be used to analyze the transactions and usage condition of the PCIe > Link. Users can choose filters to trace headers, by either requester > ID, or those downstream of a set of Root Ports on the same core of the > PTT device. It's also supported to trace the headers of certain type and > of certain direction. > > The driver registers a PMU device for each PTT device. The trace can > be used through `perf record` and the traced headers can be decoded > by `perf report`. The perf command support for the device is also > added in this patchset. The tune can be used through the sysfs > attributes of related PMU device. See the documentation for the > detailed usage. > > Change since v8: > - Cleanups and one minor fix from Jonathan and John, thanks > Link: https://lore.kernel.org/lkml/20220516125223.32012-1-yangyicong@xxxxxxxxxxxxx/ > > Change since v7: > - Configure the DMA in probe rather than in runtime. Also use devres to manage > PMU device as we have no order problem now > - Refactor the config validation function per John and Leo > - Use a spinlock hisi_ptt::pmu_lock instead of mutex to serialize the perf process > in pmu::start as it's in atomic context > - Only commit the traced data when stop, per Leo and James > - Drop the filter dynamically updating patch from this series to simply the review > of the driver. That patch will be send separately. > - add a cpumask sysfs attribute and handle the cpu hotplug events, follow the > uncore PMU convention > - Other cleanups and fixes, both in driver and perf tool > Link: https://lore.kernel.org/lkml/20220407125841.3678-1-yangyicong@xxxxxxxxxxxxx/ > > Change since v6: > - Fix W=1 errors reported by lkp test, thanks > > Change since v5: > - Squash the PMU patch into PATCH 2 suggested by John > - refine the commit message of PATCH 1 and some comments > Link: https://lore.kernel.org/lkml/20220308084930.5142-1-yangyicong@xxxxxxxxxxxxx/ > > Change since v4: > Address the comments from Jonathan, John and Ma Ca, thanks. > - Use devm* also for allocating the DMA buffers > - Remove the IRQ handler stub in Patch 2 > - Make functions waiting for hardware state return boolean > - Manual remove the PMU device as it should be removed first > - Modifier the orders in probe and removal to make them matched well > - Make available {directions,type,format} array const and non-global > - Using the right filter list in filters show and well protect the > list with mutex > - Record the trace status with a boolean @started rather than enum > - Optimize the process of finding the PTT devices of the perf-tool > Link: https://lore.kernel.org/linux-pci/20220221084307.33712-1-yangyicong@xxxxxxxxxxxxx/ > > Change since v3: > Address the comments from Jonathan and John, thanks. > - drop members in the common struct which can be get on the fly > - reduce buffer struct and organize the buffers with array instead of list > - reduce the DMA reset wait time to avoid long time busy loop > - split the available_filters sysfs attribute into two files, for root port > and requester respectively. Update the documentation accordingly > - make IOMMU mapping check earlier in probe to avoid race condition. Also > make IOMMU quirk patch prior to driver in the series > - Cleanups and typos fixes from John and Jonathan > Link: https://lore.kernel.org/linux-pci/20220124131118.17887-1-yangyicong@xxxxxxxxxxxxx/ > > Change since v2: > - address the comments from Mathieu, thanks. > - rename the directory to ptt to match the function of the device > - spinoff the declarations to a separate header > - split the trace function to several patches > - some other comments. > - make default smmu domain type of PTT device to identity > Drop the RMR as it's not recommended and use an iommu_def_domain_type > quirk to passthrough the device DMA as suggested by Robin. > Link: https://lore.kernel.org/linux-pci/20211116090625.53702-1-yangyicong@xxxxxxxxxxxxx/ > > Change since v1: > - switch the user interface of trace to perf from debugfs > - switch the user interface of tune to sysfs from debugfs > - add perf tool support to start trace and decode the trace data > - address the comments of documentation from Bjorn > - add RMR[1] support of the device as trace works in RMR mode or > direct DMA mode. RMR support is achieved by common APIs rather > than the APIs implemented in [1]. > Link: https://lore.kernel.org/lkml/1618654631-42454-1-git-send-email-yangyicong@xxxxxxxxxxxxx/ > [1] https://lore.kernel.org/linux-acpi/20210805080724.480-1-shameerali.kolothum.thodi@xxxxxxxxxx/ > > Qi Liu (3): > perf tool: arm: Refactor event list iteration in > auxtrace_record__init() > perf tool: Add support for HiSilicon PCIe Tune and Trace device driver > perf tool: Add support for parsing HiSilicon PCIe Trace packet > > Yicong Yang (5): > iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to > identity > hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe > Tune and Trace device > hwtracing: hisi_ptt: Add tune function support for HiSilicon PCIe Tune > and Trace device > docs: trace: Add HiSilicon PTT device driver documentation > MAINTAINERS: Add maintainer for HiSilicon PTT driver > > Documentation/trace/hisi-ptt.rst | 307 +++++ > Documentation/trace/index.rst | 1 + > MAINTAINERS | 7 + > drivers/Makefile | 1 + > drivers/hwtracing/Kconfig | 2 + > drivers/hwtracing/ptt/Kconfig | 12 + > drivers/hwtracing/ptt/Makefile | 2 + > drivers/hwtracing/ptt/hisi_ptt.c | 1092 +++++++++++++++++ > drivers/hwtracing/ptt/hisi_ptt.h | 200 +++ > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 21 + > tools/perf/arch/arm/util/auxtrace.c | 116 +- > tools/perf/arch/arm/util/pmu.c | 3 + > tools/perf/arch/arm64/util/Build | 2 +- > tools/perf/arch/arm64/util/hisi-ptt.c | 187 +++ > tools/perf/util/Build | 2 + > tools/perf/util/auxtrace.c | 4 + > tools/perf/util/auxtrace.h | 1 + > tools/perf/util/hisi-ptt-decoder/Build | 1 + > .../hisi-ptt-decoder/hisi-ptt-pkt-decoder.c | 164 +++ > .../hisi-ptt-decoder/hisi-ptt-pkt-decoder.h | 31 + > tools/perf/util/hisi-ptt.c | 192 +++ > tools/perf/util/hisi-ptt.h | 19 + > 22 files changed, 2347 insertions(+), 20 deletions(-) > create mode 100644 Documentation/trace/hisi-ptt.rst > create mode 100644 drivers/hwtracing/ptt/Kconfig > create mode 100644 drivers/hwtracing/ptt/Makefile > create mode 100644 drivers/hwtracing/ptt/hisi_ptt.c > create mode 100644 drivers/hwtracing/ptt/hisi_ptt.h > create mode 100644 tools/perf/arch/arm64/util/hisi-ptt.c > create mode 100644 tools/perf/util/hisi-ptt-decoder/Build > create mode 100644 tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.c > create mode 100644 tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.h > create mode 100644 tools/perf/util/hisi-ptt.c > create mode 100644 tools/perf/util/hisi-ptt.h >
