From patchwork Mon Feb 21 08:42:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yicong Yang X-Patchwork-Id: 12753253 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 710D8C4332F for ; Mon, 21 Feb 2022 08:44:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344279AbiBUIoo (ORCPT ); Mon, 21 Feb 2022 03:44:44 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:34354 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344168AbiBUIom (ORCPT ); Mon, 21 Feb 2022 03:44:42 -0500 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D589A12AE7; Mon, 21 Feb 2022 00:44:18 -0800 (PST) Received: from canpemm500009.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4K2G621hC9zcft4; Mon, 21 Feb 2022 16:43:06 +0800 (CST) Received: from localhost.localdomain (10.67.164.66) 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 15.1.2308.21; Mon, 21 Feb 2022 16:44:16 +0800 From: Yicong Yang To: , , , , , , , , , , , , , , , , , , , , , , , , CC: , , , , , Subject: [PATCH v4 0/8] Add support for HiSilicon PCIe Tune and Trace device Date: Mon, 21 Feb 2022 16:42:59 +0800 Message-ID: <20220221084307.33712-1-yangyicong@hisilicon.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 X-Originating-IP: [10.67.164.66] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To canpemm500009.china.huawei.com (7.192.105.203) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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 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/ Qi Liu (1): perf tool: Add support for HiSilicon PCIe Tune and Trace device driver Yicong Yang (7): iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to identity hwtracing: Add trace function support for HiSilicon PCIe Tune and Trace device hisi_ptt: Register PMU device for PTT trace hisi_ptt: Add support for dynamically updating the filter list hisi_ptt: Add tune function support for HiSilicon PCIe Tune and Trace device docs: Add HiSilicon PTT device driver documentation MAINTAINERS: Add maintainer for HiSilicon PTT driver Documentation/trace/hisi-ptt.rst | 303 +++++ MAINTAINERS | 7 + drivers/Makefile | 1 + drivers/hwtracing/Kconfig | 2 + drivers/hwtracing/ptt/Kconfig | 11 + drivers/hwtracing/ptt/Makefile | 2 + drivers/hwtracing/ptt/hisi_ptt.c | 1133 +++++++++++++++++ drivers/hwtracing/ptt/hisi_ptt.h | 224 ++++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 16 + tools/perf/arch/arm/util/auxtrace.c | 56 +- tools/perf/arch/arm/util/pmu.c | 3 + tools/perf/arch/arm64/util/Build | 2 +- tools/perf/arch/arm64/util/hisi_ptt.c | 195 +++ 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 | 170 +++ .../hisi-ptt-decoder/hisi-ptt-pkt-decoder.h | 28 + tools/perf/util/hisi_ptt.c | 218 ++++ tools/perf/util/hisi_ptt.h | 28 + 21 files changed, 2403 insertions(+), 4 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