From patchwork Mon Jul 31 04:10:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 708505 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 810CBC04E69 for ; Mon, 31 Jul 2023 04:10:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229895AbjGaEKk (ORCPT ); Mon, 31 Jul 2023 00:10:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229889AbjGaEKi (ORCPT ); Mon, 31 Jul 2023 00:10:38 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D4B4E45; Sun, 30 Jul 2023 21:10:32 -0700 (PDT) Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36V4ALdY003422; Mon, 31 Jul 2023 04:10:21 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-transfer-encoding : content-type; s=qcppdkim1; bh=iPGu+a7vfT6bkQwP2to6KXLKlH2TykxH0AmqhSrw8I8=; b=jIvB004Tk1bF8FxLKQcnbEr8TmonQJpfztHPo0y9rYRtJ5s7YlEEjRve73XSZRwO+4jk GThmgXnCf5pNWv0QefwMTddzZiPbyv4gwlj4yPqOf8b3x2oEkxUeGh4yuNEqyAFqPWBu WznyvIcd/ClsoNuKllG5sZ9hd1IAAzMSUHpEqbQlgJXtp8aM1Ril2ZcB5mF4LHSEYB5W yhrO8gHoNIzWBIG5KOE5kuo12TLEJw/j3/X49rdoqipKhueZq2q/t+MDlSHS1oRWgj3d 5XY7So4bV1Jx4QzeoHsJeXkct/UMgr9azIb5+iTmpCe5ewOkxUxdbw2lyUvVi8tKJb97 Ug== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3s4uh3aju8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Jul 2023 04:10:21 +0000 Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 36V4AJlu031491 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Jul 2023 04:10:19 GMT Received: from hu-bjorande-lv.qualcomm.com (10.49.16.6) 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; Sun, 30 Jul 2023 21:10:19 -0700 From: Bjorn Andersson To: Bjorn Andersson , Konrad Dybcio , Chris Lew CC: Alex Elder , "David S. Miller" , Jakub Kicinski , Mathieu Poirier , , , , Subject: [PATCH 2/4] soc: qcom: aoss: Add debugfs interface for sending messages Date: Sun, 30 Jul 2023 21:10:11 -0700 Message-ID: <20230731041013.2950307-3-quic_bjorande@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230731041013.2950307-1-quic_bjorande@quicinc.com> References: <20230731041013.2950307-1-quic_bjorande@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) 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-ORIG-GUID: ZQ3AGRPXVoyKxIE4dpVoNMcWhIITraLf X-Proofpoint-GUID: ZQ3AGRPXVoyKxIE4dpVoNMcWhIITraLf 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=2023-07-27_10,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxscore=0 lowpriorityscore=0 spamscore=0 priorityscore=1501 phishscore=0 malwarescore=0 mlxlogscore=999 clxscore=1015 suspectscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307310037 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Chris Lew In addition to the normal runtime commands, the Always On Processor (AOP) provides a number of debug commands which can be used during system debugging for things such as preventing power collapse or placing floor votes for certain resources. Some of these are documented in the Robotics RB5 "Debug AOP ADB" linked below. Provide a debugfs interface for the developer/tester to send these commands to the AOP. Link: https://docs.qualcomm.com/bundle/publicresource/topics/80-88500-3/85_Debugging_AOP_ADB.html Signed-off-by: Chris Lew [bjorn: Dropped debugfs guards, improve error codes, rewrote commit message] Signed-off-by: Bjorn Andersson --- drivers/soc/qcom/qcom_aoss.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/soc/qcom/qcom_aoss.c b/drivers/soc/qcom/qcom_aoss.c index 5e74332515cf..4c5bb7034fff 100644 --- a/drivers/soc/qcom/qcom_aoss.c +++ b/drivers/soc/qcom/qcom_aoss.c @@ -3,6 +3,7 @@ * Copyright (c) 2019, Linaro Ltd */ #include +#include #include #include #include @@ -82,6 +83,7 @@ struct qmp { struct clk_hw qdss_clk; struct qmp_cooling_device *cooling_devs; + struct dentry *debugfs_file; }; static void qmp_kick(struct qmp *qmp) @@ -475,6 +477,32 @@ void qmp_put(struct qmp *qmp) } EXPORT_SYMBOL(qmp_put); +static ssize_t qmp_debugfs_write(struct file *file, const char __user *userstr, + size_t len, loff_t *pos) +{ + struct qmp *qmp = file->private_data; + char buf[QMP_MSG_LEN]; + int ret; + + if (!len || len > QMP_MSG_LEN) + return -EINVAL; + + if (copy_from_user(buf, userstr, len)) + return -EFAULT; + buf[len] = '\0'; + + ret = qmp_send(qmp, buf); + if (ret < 0) + return ret; + + return len; +} + +static const struct file_operations qmp_debugfs_fops = { + .open = simple_open, + .write = qmp_debugfs_write, +}; + static int qmp_probe(struct platform_device *pdev) { struct qmp *qmp; @@ -523,6 +551,9 @@ static int qmp_probe(struct platform_device *pdev) platform_set_drvdata(pdev, qmp); + qmp->debugfs_file = debugfs_create_file("aoss_send_message", 0220, NULL, + qmp, &qmp_debugfs_fops); + return 0; err_close_qmp: @@ -537,6 +568,8 @@ static int qmp_remove(struct platform_device *pdev) { struct qmp *qmp = platform_get_drvdata(pdev); + debugfs_remove(qmp->debugfs_file); + qmp_qdss_clk_remove(qmp); qmp_cooling_devices_remove(qmp);