From patchwork Tue Sep 10 10:01:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mao Jinlong X-Patchwork-Id: 827096 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 E8EA517BEAD; Tue, 10 Sep 2024 10:01:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725962513; cv=none; b=WYiUNOWsuDpRCJntLUZpQHHJT0fmkwM8SqWJzGj839ZthUlqb5zJ75dJXVsaDYF1z8E7tjgbjWOnmwg8p9ljm6vuipjBEYe8OhXpMgEl3Ex/anjUuGJ3edbBF6+/Y/ufvyUa/NXDbWytpq/4KzVwIRSwCLhfcc94gjqOLnLZrjo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725962513; c=relaxed/simple; bh=EhBsYloVB+zYiiKtGFXpoYaZd8W39qoAE0ePMjthAzE=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=PABJvnnsCzUtIzKmOzwVXljBKNX6ybBRP813VX4/DlBTFCaRpR6cV2Fx52cbfUpi01Kkc+ZYenLssg8HKDq7OLhujg8z5KlZ/wQa61nferwVO8frs8yIrymAz4Gh1yG7kY5WOrHzRGDq7D/VCcd4e0+ORgE+lzaXLmmOxWIU1mc= 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=Z+igTG2O; arc=none smtp.client-ip=205.220.168.131 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="Z+igTG2O" Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 48A47osa022192; Tue, 10 Sep 2024 10:01:40 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=qcppdkim1; bh=GKViQbQ56BBU4UqObaKO7g KB2TF6OxYpGJ6GbHkBu0M=; b=Z+igTG2OE/leliHLnwRx/+rbO9cjCE96pfXZyk 4g0cIfj5I9cYoUevJo1QQ1+eEjCIfUhK39C3XYSQUmR8HFTDURSNC7XScK0Wn1hn 84t3fstqAnnnybW5TPtT7V4a+DVKJkBosePEoh94eQXroEd2MUMnKHQLe/xs2WdM 9lXxo0qv7D67qzHW6Jz0GDGyxzrj02m0dijlSn/oF7Vcnr6x7vmYWoj52CxATqNX 5ovxzj9RQlGpd17vslkAscHiP+DC3AfqDU2noPf6odUqkqRh3QUC5lx/9KqVThKf 5jVJmhLmNr/kSEKz99OpBFReFXKc/6aV4QTTA69sCmu1Vz8Q== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 41he5dvpqc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 10 Sep 2024 10:01:40 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 48AA1dU2031658 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 10 Sep 2024 10:01:39 GMT Received: from hu-jinlmao-lv.qualcomm.com (10.49.16.6) 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, 10 Sep 2024 03:01:38 -0700 From: Mao Jinlong To: Suzuki K Poulose , Mike Leach , James Clark , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mao Jinlong , "Alexander Shishkin" CC: , , , , Subject: [PATCH v4 RESEND 0/3] coresight: Add static trace id support Date: Tue, 10 Sep 2024 03:01:22 -0700 Message-ID: <20240910100127.8948-1-quic_jinlmao@quicinc.com> X-Mailer: git-send-email 2.46.0 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) 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: R5ob_mQzI7_5Fdt_lWfhOtK93roNfaAY X-Proofpoint-GUID: R5ob_mQzI7_5Fdt_lWfhOtK93roNfaAY 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 clxscore=1011 priorityscore=1501 suspectscore=0 lowpriorityscore=0 impostorscore=0 malwarescore=0 mlxscore=0 phishscore=0 bulkscore=0 adultscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409100075 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 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,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 | 59 +++++++++++++++++-- .../hwtracing/coresight/coresight-platform.c | 26 ++++++++ .../hwtracing/coresight/coresight-trace-id.c | 38 ++++++++---- .../hwtracing/coresight/coresight-trace-id.h | 9 +++ include/linux/coresight.h | 1 + 7 files changed, 140 insertions(+), 14 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-dummy-source