From patchwork Tue Jun 20 07:32:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tao Zhang X-Patchwork-Id: 13285253 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 5F3CAEB64DC for ; Tue, 20 Jun 2023 07:34:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229995AbjFTHek (ORCPT ); Tue, 20 Jun 2023 03:34:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230373AbjFTHe3 (ORCPT ); Tue, 20 Jun 2023 03:34:29 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CB7F11D; Tue, 20 Jun 2023 00:34:27 -0700 (PDT) Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 35K6xF3q030849; Tue, 20 Jun 2023 07:34:05 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=jcfc3+ZNk7jCww8lgKXjJoKyRBJfleFcPzEVl0RBPvo=; b=VM4TNb+A0gcrpBwVmjSTDI3IyBCkUE9on6IZp2Sxu9a5w9+ISzcdXiKW0FoPJA902aOc E81Xarz+nCVsk8M4qYHj1nvYgsZ6Eav67w2tYi4A34jpnzy8fxJBfs3RdohqqxPHBIDN sbiF+h6+V37ITIbx6WuzBMSISIwyeWh1PdXtAYNusRcVldjLjpMNhqaNjEVWCv+kBhsx d8CYRCYEXC2umJVXppb5voNLH+WY6BpLHQVhOjRPzaji7wPgBsO3MjpJnaCgUumXrn7I Z5yFcbyc1Mf5B9Jbwxc12K1ljsPzuKln6zEpnidky9+DUZQ5nuAva2PYpOZxZe8vtH1v Lw== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3rb6nmr43n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 20 Jun 2023 07:34:05 +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 35K7Y4Ev025835 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 20 Jun 2023 07:34:04 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 15.2.986.42; Tue, 20 Jun 2023 00:33:33 -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 v6 06/13] coresight-tpdm: Add reset node to TPDM node Date: Tue, 20 Jun 2023 15:32:34 +0800 Message-ID: <1687246361-23607-7-git-send-email-quic_taozha@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1687246361-23607-1-git-send-email-quic_taozha@quicinc.com> References: <1687246361-23607-1-git-send-email-quic_taozha@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) 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: GSMW1LwoVtqRM0Wb242IwmMUWih-jKZo X-Proofpoint-ORIG-GUID: GSMW1LwoVtqRM0Wb242IwmMUWih-jKZo X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-20_04,2023-06-16_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 mlxlogscore=999 spamscore=0 mlxscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 impostorscore=0 phishscore=0 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306200067 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 --- .../ABI/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 4a58e64..dbc2fbd0 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 +Date: March 2023 +KernelVersion 6.5 +Contact: Jinlong Mao (QUIC) , Tao Zhang (QUIC) +Description: + (Write) Reset the dataset of the tpdm, and disable 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 52aa48a6..acc3eea 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -159,6 +159,27 @@ static int tpdm_datasets_setup(struct tpdm_drvdata *drvdata) return 0; } +static ssize_t reset_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, 10, &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); + /* * value 1: 64 bits test data * value 2: 32 bits test data @@ -199,6 +220,7 @@ static ssize_t integration_test_store(struct device *dev, static DEVICE_ATTR_WO(integration_test); static struct attribute *tpdm_attrs[] = { + &dev_attr_reset.attr, &dev_attr_integration_test.attr, NULL, };