From patchwork Thu Sep 28 06:29:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tao Zhang X-Patchwork-Id: 727228 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 2B9FCCE7B00 for ; Thu, 28 Sep 2023 06:31:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230411AbjI1GbI (ORCPT ); Thu, 28 Sep 2023 02:31:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230426AbjI1GbC (ORCPT ); Thu, 28 Sep 2023 02:31:02 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D24391AA; Wed, 27 Sep 2023 23:30:56 -0700 (PDT) Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 38S5MDkx024664; Thu, 28 Sep 2023 06:30:45 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=YhKIpatrBvdIpmC7FIvGwKatW8WTxlPogyvQfWxRf40=; b=MUNz+pextQoN//uuU02UDq+Klr+KHhFQRZWhGpfTNmhvH6kbWkPIyfi63n1sW2FvpI+g 7uPc7InHLqSctEzZJdjSstRrwbobmwVapAkwpPZSJ2uZXwl8zopnnCogCnAAosPdgd1D VIdZ7DGNyBBtTzs7xEKM1G+I18OUTRbW+oUO74onfmnUgf9COKlhZi5+0R0cjyJKNSTZ pr/KCrDv/XHE8EEpdPI4QMwenFIOjH5GV2eaRHMxYj9ZJKCje8B29fLhEZrK02nsTNny oGyV8ES064cXhV/LTLZrhZLkTJjjvrSHNqAHtMlZqtGm+TZf6IbTxRz9bgUBQ947fdso CQ== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3td2vu04fq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Sep 2023 06:30:45 +0000 Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 38S6Uh6m000856 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Sep 2023 06:30:43 GMT Received: from taozha-gv.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Wed, 27 Sep 2023 23:30:38 -0700 From: Tao Zhang To: Mathieu Poirier , Suzuki K Poulose , Alexander Shishkin , Konrad Dybcio , Mike Leach , Rob Herring , Krzysztof Kozlowski CC: Tao Zhang , Jinlong Mao , Leo Yan , Greg Kroah-Hartman , , , , , Tingwei Zhang , Yuanfang Zhang , Trilok Soni , Hao Zhang , , Subject: [PATCH v10 06/13] coresight-tpdm: Add reset node to TPDM node Date: Thu, 28 Sep 2023 14:29:39 +0800 Message-ID: <1695882586-10306-7-git-send-email-quic_taozha@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1695882586-10306-1-git-send-email-quic_taozha@quicinc.com> References: <1695882586-10306-1-git-send-email-quic_taozha@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: hLqKQvjqKUIpSunQ1OnTieLhgfbT1D04 X-Proofpoint-ORIG-GUID: hLqKQvjqKUIpSunQ1OnTieLhgfbT1D04 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-09-28_03,2023-09-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 mlxscore=0 phishscore=0 spamscore=0 adultscore=0 bulkscore=0 clxscore=1015 malwarescore=0 impostorscore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2309280053 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org TPDM device need a node to reset the configurations and status of it. This change provides a node to reset the configurations and disable the TPDM if it has been enabled. Signed-off-by: Tao Zhang --- .../testing/sysfs-bus-coresight-devices-tpdm | 10 +++++++++ drivers/hwtracing/coresight/coresight-tpdm.c | 22 +++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm index 4a58e649550d..ef8b5a6bd4ac 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm @@ -11,3 +11,13 @@ Description: Accepts only one of the 2 values - 1 or 2. 1 : Generate 64 bits data 2 : Generate 32 bits data + +What: /sys/bus/coresight/devices//reset_dataset +Date: March 2023 +KernelVersion 6.7 +Contact: Jinlong Mao (QUIC) , Tao Zhang (QUIC) +Description: + (Write) Reset the dataset of the tpdm. + + Accepts only one value - 1. + 1 : Reset the dataset of the tpdm diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index 951ad4d9b76f..9c65e4c01128 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -162,6 +162,27 @@ static int tpdm_datasets_setup(struct tpdm_drvdata *drvdata) return 0; } +static ssize_t reset_dataset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + int ret = 0; + unsigned long val; + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + ret = kstrtoul(buf, 0, &val); + if (ret || val != 1) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + tpdm_reset_datasets(drvdata); + spin_unlock(&drvdata->spinlock); + + return size; +} +static DEVICE_ATTR_WO(reset_dataset); + /* * value 1: 64 bits test data * value 2: 32 bits test data @@ -202,6 +223,7 @@ static ssize_t integration_test_store(struct device *dev, static DEVICE_ATTR_WO(integration_test); static struct attribute *tpdm_attrs[] = { + &dev_attr_reset_dataset.attr, &dev_attr_integration_test.attr, NULL, };