From patchwork Thu Nov 21 06:28:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mao Jinlong X-Patchwork-Id: 844730 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 E0CDD13BAE2; Thu, 21 Nov 2024 06:29:40 +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=1732170583; cv=none; b=C9So8SoawKAZh6kbcWAUfXZvBTtVAFExMGbQ6N29cqrCvgLRr5IualKEPzA/lgm6KOY0u05F02RCUPC8cySONXp7R9dFCd9oPX/8HdZqvTut8qpi9ypZmLcKFU1i7GeNlLpouPzH/u6/sjhntjqZoRGQSiKxk20qxmmqqP4ydgY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732170583; c=relaxed/simple; bh=mTWPV0gIgHDog2uXFOnS389UXCeW/2XGwpYln+GxFLQ=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=CoRK/C3+aV3Wq5DKrxIjnJahI818xGRyM8UsJFTnpQR7Xc6tAHLBZYbsq2Z3010hgj4fkPLF+Vxc+7dk+7HvZTT7B4YBcasQMR5+Unwf8+Oar4ZiE5EztObd0L7Nj4XneowQBpFq/cFBnej6idHNnersGGcne6EpJ1Yhe5tnO1M= 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=dF06L/Zi; 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="dF06L/Zi" 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 4AKKaRaK007992; Thu, 21 Nov 2024 06:29:23 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-type:date:from:message-id:mime-version:subject:to; s= qcppdkim1; bh=4ut5+nCISlmsl3N5249soTZ7S8Hl0F8iDKCNX0DkTMs=; b=dF 06L/Zi60ERJRO0+T63Yyq5C9uv2Jbtm4BNKw6/m8xoBPk+PNJ8ApXb2liInUxAzx jSPnmdVen04JMU0HJhJfxPJzUwIXMX68BDioZ2tvSIuduc9rYzPtyqwRdMmt68Af 4zuRCKlQIxaY8ZLTQnmMmnbibMpGkVP5jKGBnqBW8Z/FwbyjkoPF4SGzY/YWej+K BFfZJVry2ChZFLkLrsiXznpp0VEZqxvlMMoOypjE+JCg+N1IO6iGlPlCVKu8tVP5 Ikt0f89R52bVOplnzKdYsIPFAc6KpgXrFB/gKY9cYp85y51zCJIV8mSLUa6vAUU+ WyekIuLpMlGnzRPGaLeA== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4318uvkerq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Nov 2024 06:29:23 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA02.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4AL6TMa9019219 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Nov 2024 06:29:22 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; Wed, 20 Nov 2024 22:29:17 -0800 From: Mao Jinlong To: Suzuki K Poulose , Mike Leach , James Clark , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mao Jinlong , "Alexander Shishkin" CC: , , , , Subject: [PATCH v7 0/3] coresight: Add static trace id support Date: Thu, 21 Nov 2024 14:28:26 +0800 Message-ID: <20241121062829.11571-1-quic_jinlmao@quicinc.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) 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: tv4B5aru_P-Dcw4LZV1CwpD5gDwdYWdo X-Proofpoint-GUID: tv4B5aru_P-Dcw4LZV1CwpD5gDwdYWdo 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 impostorscore=0 bulkscore=0 priorityscore=1501 phishscore=0 adultscore=0 malwarescore=0 mlxscore=0 lowpriorityscore=0 mlxlogscore=999 spamscore=0 suspectscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411210047 Some HW has static trace id which cannot be changed via software programming. For this case, configure the trace id in device tree with "arm,static-trace-id = ", and call coresight_trace_id_get_static_system_id with the trace id value in device probe function. The id will be reserved for the HW all the time if the device is probed. Changes since V6: 1. Add code to handle a case where the preferred_id is not valid when use static id. 2. Returen busy when static id is not freed. Changes since V5: 1. Remove the warn for staic id not available. 2. Drop the system_id if registering the coresight device fails. 3. Return busy when static id is not available in dummy driver. Changes since V4: 1. Use fwnode_property_read_u32 in fwnode_property_read_u32. 2. Update date and version in sysfs-bus-coresight-devices-dummy-source Changes since V3: 1. Adda new API function int coresight_trace_id_get_system_static_id(int trace_id). 2. Use the term "static trace id" for these devices where the hardware sets a non-programmable trace ID. Changes since V2: 1. Change "trace-id" to "arm,trace-id". 2. Add trace id flag for getting preferred id or ODD id. Changes since V1: 1. Add argument to coresight_trace_id_get_system_id for preferred id instead of adding new function coresight_trace_id_reserve_system_id. 2. Add constraint to trace-id in dt-binding file. Mao Jinlong (3): dt-bindings: arm: Add arm,static-trace-id for coresight dummy source coresight: Add support to get static id for system trace sources coresight: dummy: Add static trace id support for dummy source .../sysfs-bus-coresight-devices-dummy-source | 15 ++++ .../arm/arm,coresight-dummy-source.yaml | 6 ++ drivers/hwtracing/coresight/coresight-dummy.c | 81 ++++++++++++++++--- .../hwtracing/coresight/coresight-platform.c | 6 ++ .../hwtracing/coresight/coresight-trace-id.c | 43 +++++++--- .../hwtracing/coresight/coresight-trace-id.h | 9 +++ include/linux/coresight.h | 1 + 7 files changed, 140 insertions(+), 21 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-dummy-source