On 2022/9/9 7:09, Mathieu Poirier wrote: > On Tue, Aug 16, 2022 at 07:44:09PM +0800, Yicong Yang wrote: >> From: Yicong Yang <yangyicong@xxxxxxxxxxxxx> >> >> 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 tune can be used through the sysfs attributes of related PMU device. See >> the documentation for the detailed usage. >> >> This patchset adds an initial driver support for the PTT device. The userspace >> perf tool support will be sent in a separate patchset. >> >> Change since v11: >> - Drop WARN_ON() for irq_set_affinity() failure per Greg >> - Split out userspace perf support patches according to the comments >> Link: https://lore.kernel.org/lkml/20220721130116.43366-1-yangyicong@xxxxxxxxxx/ >> >> Change since v10: >> - Use title case in the documentation >> - Add RB from Bagas, thanks. >> Link: https://lore.kernel.org/lkml/20220714092710.53486-1-yangyicong@xxxxxxxxxxxxx/ >> >> Change since v9: >> - Add sysfs ABI description documentation >> - Remove the controversial available_{root_port, requester}_filters sysfs file >> - Shorten 2 tune sysfs attributes name and add some comments >> - Move hisi_ptt_process_auxtrace_info() to Patch 6. >> - Add RB from Leo and Ack-by from Mathieu, thanks! >> Link: https://lore.kernel.org/lkml/20220606115555.41103-1-yangyicong@xxxxxxxxxxxxx/ >> >> 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/ >> >> 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 >> >> .../ABI/testing/sysfs-devices-hisi_ptt | 61 + >> Documentation/trace/hisi-ptt.rst | 298 +++++ >> Documentation/trace/index.rst | 1 + >> MAINTAINERS | 8 + >> drivers/Makefile | 1 + >> drivers/hwtracing/Kconfig | 2 + >> drivers/hwtracing/ptt/Kconfig | 12 + >> drivers/hwtracing/ptt/Makefile | 2 + >> drivers/hwtracing/ptt/hisi_ptt.c | 1047 +++++++++++++++++ >> drivers/hwtracing/ptt/hisi_ptt.h | 200 ++++ >> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 21 + > > I fixed the month and kernel revision in sysfs-devices-hisi_ptt before applying > this set. You can double check that everything is to your liking in the > coresight next tree[1]. > Thanks a lot for the fixes, I thought to use the month when posting the patches and sorry for calculating a wrong release version. I've pulled and checked again and everything is fine. Thanks you again and everybody helped reveiw this series! Regards, Yicong. > Thanks, > Mathieu > > [1]. https://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git/log/?h=next > > >> 11 files changed, 1653 insertions(+) >> create mode 100644 Documentation/ABI/testing/sysfs-devices-hisi_ptt >> 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 >> >> -- >> 2.24.0 >> > . >
