From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9B2AEECAAD4 for ; Tue, 30 Aug 2022 11:03:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:CC:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=aNFSqP6XYp1FQ0JsyahM0F+PflYoG5I4f9cp0NjTNN0=; b=ZyLIgQteGBiMx8DGiRiYSxDc/8 luDlotmFABoHcplXFCJgDpqotNBrXudcRKl4clcfqzGwzgMDY9eszx5g8Od1R7WzfzST5LeCtJeuV HCoelyb0eRdV0MZtqpvDDW8SeK6ApOdVhJowW18ziM0tupwxrRUGFo4pSUTlQnGzhrWVHghJs3ASj oquyyfTowEpf5F381VhrM3R+NHiTxAR8w3NOsGi+Qe/ksbdCj6GEvNHG2diqQU0EcZbuJfbuOSLjL EcJxgXhF89+EkXNVyeDusPafiswOEPByEYJa3J+qIoL1LONGz59qt0B1gCAzKifwXy3RotAzGea8a wjQUABhw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oSyyb-00GMLJ-Ii; Tue, 30 Aug 2022 11:00:16 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oSyy7-00GM3v-5z for linux-arm-kernel@lists.infradead.org; Tue, 30 Aug 2022 10:59:47 +0000 Received: from canpemm500009.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4MH4513GpTznTqy; Tue, 30 Aug 2022 18:57:09 +0800 (CST) Received: from [10.67.102.169] (10.67.102.169) by canpemm500009.china.huawei.com (7.192.105.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 30 Aug 2022 18:59:34 +0800 CC: , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v12 0/5] Add driver support for HiSilicon PCIe Tune and Trace device To: , , , , References: <20220816114414.4092-1-yangyicong@huawei.com> From: Yicong Yang Message-ID: <86bfaabc-43e3-bcfb-faf9-74a0d79ab2ec@huawei.com> Date: Tue, 30 Aug 2022 18:59:34 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 MIME-Version: 1.0 In-Reply-To: <20220816114414.4092-1-yangyicong@huawei.com> X-Originating-IP: [10.67.102.169] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To canpemm500009.china.huawei.com (7.192.105.203) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220830_035943_703799_E49304B2 X-CRM114-Status: GOOD ( 40.83 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org A gentle ping for this... Thanks. On 2022/8/16 19:44, Yicong Yang wrote: > From: Yicong Yang > > 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@huawei.com/ > > Change since v10: > - Use title case in the documentation > - Add RB from Bagas, thanks. > Link: https://lore.kernel.org/lkml/20220714092710.53486-1-yangyicong@hisilicon.com/ > > 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@hisilicon.com/ > > Change since v8: > - Cleanups and one minor fix from Jonathan and John, thanks > Link: https://lore.kernel.org/lkml/20220516125223.32012-1-yangyicong@hisilicon.com/ > > 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@hisilicon.com/ > > 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@hisilicon.com/ > > 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@hisilicon.com/ > > 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@hisilicon.com/ > > 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@hisilicon.com/ > > 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@hisilicon.com/ > [1] https://lore.kernel.org/linux-acpi/20210805080724.480-1-shameerali.kolothum.thodi@huawei.com/ > > 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 + > 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 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel