From nobody Sun Nov 24 14:01:29 2024 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3454D1D63EA; Tue, 5 Nov 2024 12:40:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730810418; cv=none; b=rCpeskqgFdsDuPcUAlQXLSmwYvpb/OnSjZkGFi35UtNlCA+NC+buXb6pZKl8uFR7qY0atPKEyRpPQLyKlM5pDyjMNtsMB+sfRkb2Zcs2FhLeZGsO1TOS5qQZR3WvQMnHChBNzecnVpVLaNYMw4Y9kxk+0FqjWqiYZ/15vbLPywI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730810418; c=relaxed/simple; bh=EX2TxRDwO3f2Tm0qSOGaeCugTskVNLT6wP+qrzO5gy4=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=tVHhfwbpr8GtCU1Ij8ewKfGWbQLtsUjFWDLVY/5kqswKhssY/uTYLAKt/jqxR8Qmwv39GtTqzoDGaX3N7tSmblDduc19cXvRfwzbs0IDozDHEDJy/iCC8dpo1ux0w96K7Wu/iUZVI1vq9RagxpW76aD9S2sGIEpRyOWXNwtw84s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=WzpcucBr; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="WzpcucBr" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4A5A6cP8021461; Tue, 5 Nov 2024 12:40:09 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=qcppdkim1; bh=p/Kj6Rf50/Cac0anpob3ONk6 4MfLU3vCqh2fh0Omueo=; b=WzpcucBrVvFNKKZ2MOB3X6VKOb/l+/PmvleNstZ1 0qUgwM87+/s0mny3nKzB2/qTBJgVsCsYVkqw/U901pwT4FeaG/GxGqLG3TIfPPtM NtkA3ASybLg2EIvSk7TBrjUb/Ip/LdMHSwhu7GwJvDtrr4fF0YeEGYURYmqtWJqd Q3cK2FJL0pEtF5cuZ6/WPhuiPj7XHC86V9LRUJ3wnal+BMdscMCtgdlifoqSWan+ YrqHsFBHKIUhrDPjDEIMtMg0PKrwzyYQWfqxEoXfQV5GLy5SE1ZKO3e0qOAM+hSa ziufmJl1Ry1pl0Hau7gJ6xl7YDsrNxoIB6OvgeGIccAOjA== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 42ncyxykcq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 05 Nov 2024 12:40:09 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4A5Ce8NB028394 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 5 Nov 2024 12:40:08 GMT Received: from jinlmao-gv.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Tue, 5 Nov 2024 04:40:05 -0800 From: Mao Jinlong To: Suzuki K Poulose , Mike Leach , James Clark , "Alexander Shishkin" CC: Tao Zhang , , , , , Mao Jinlong Subject: [PATCH v2 3/3] coresight-tpdm: Add support to enable the lane for MCMB TPDM Date: Tue, 5 Nov 2024 20:39:40 +0800 Message-ID: <20241105123940.39602-4-quic_jinlmao@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20241105123940.39602-1-quic_jinlmao@quicinc.com> References: <20241105123940.39602-1-quic_jinlmao@quicinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: XCCImNJbR_0os3Ug7-Zs0l-TP6mx89n1 X-Proofpoint-GUID: XCCImNJbR_0os3Ug7-Zs0l-TP6mx89n1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 bulkscore=0 impostorscore=0 priorityscore=1501 lowpriorityscore=0 mlxscore=0 phishscore=0 adultscore=0 mlxlogscore=999 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411050097 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Tao Zhang Add the sysfs file to set/get the enablement of the lane. For MCMB configurations, the field "E_LN" in CMB_CR register is the individual lane enables. MCMB lane N is enabled for trace generation when M_CMB_CR.E=3D1 and M_CMB_CR.E_LN[N]=3D1. For lanes that are not implemented on a given MCMB configuration, the corresponding bits of this field read as 0 and ignore writes. Signed-off-by: Tao Zhang Signed-off-by: Mao Jinlong --- .../testing/sysfs-bus-coresight-devices-tpdm | 7 +++++ drivers/hwtracing/coresight/coresight-tpdm.c | 29 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-tpdm.h | 3 ++ 3 files changed, 39 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/D= ocumentation/ABI/testing/sysfs-bus-coresight-devices-tpdm index e833edfec79e..fcc2a8f1f17f 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm @@ -265,3 +265,10 @@ Contact: Tao Zhang (QUIC) Description: (RW) Set/Get which lane participates in the output pattern match cross trigger mechanism for the MCMB subunit TPDM. + +What: /sys/bus/coresight/devices//mcmb_lanes_select +Date: Nov 2024 +KernelVersion 6.13 +Contact: Tao Zhang (QUIC) +Description: + (RW) Set/Get the enablement of the individual lane. diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtraci= ng/coresight/coresight-tpdm.c index 2e4dc86b03ea..bb0d6505ec9f 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -1063,6 +1063,34 @@ static ssize_t mcmb_trig_lane_store(struct device *d= ev, } static DEVICE_ATTR_RW(mcmb_trig_lane); =20 +static ssize_t mcmb_lanes_select_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata =3D dev_get_drvdata(dev->parent); + + return sysfs_emit(buf, "%u\n", + (unsigned int)drvdata->cmb->mcmb.lane_select); +} + +static ssize_t mcmb_lanes_select_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata =3D dev_get_drvdata(dev->parent); + unsigned long val; + + if (kstrtoul(buf, 0, &val) || (val & ~TPDM_MCMB_E_LN_MASK)) + return -EINVAL; + + guard(spinlock)(&drvdata->spinlock); + drvdata->cmb->mcmb.lane_select =3D val & TPDM_MCMB_E_LN_MASK; + + return size; +} +static DEVICE_ATTR_RW(mcmb_lanes_select); + static struct attribute *tpdm_dsb_edge_attrs[] =3D { &dev_attr_ctrl_idx.attr, &dev_attr_ctrl_val.attr, @@ -1227,6 +1255,7 @@ static struct attribute *tpdm_cmb_msr_attrs[] =3D { =20 static struct attribute *tpdm_mcmb_attrs[] =3D { &dev_attr_mcmb_trig_lane.attr, + &dev_attr_mcmb_lanes_select.attr, NULL, }; =20 diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtraci= ng/coresight/coresight-tpdm.h index aa9746b2e77f..a80f3d680995 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.h +++ b/drivers/hwtracing/coresight/coresight-tpdm.h @@ -48,6 +48,9 @@ /* MAX lanes in the output pattern for MCMB configurations*/ #define TPDM_MCMB_MAX_LANES 8 =20 +/* Filter bit 0~7 from the value for CR_E_LN */ +#define TPDM_MCMB_E_LN_MASK GENMASK(7, 0) + /* DSB Subunit Registers */ #define TPDM_DSB_CR (0x780) #define TPDM_DSB_TIER (0x784) --=20 2.17.1