From mboxrd@z Thu Jan 1 00:00:00 1970 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 CE905C6FA86 for ; Mon, 19 Sep 2022 16:03:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230392AbiISQDE (ORCPT ); Mon, 19 Sep 2022 12:03:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230197AbiISQCf (ORCPT ); Mon, 19 Sep 2022 12:02:35 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0BB63C8E1; Mon, 19 Sep 2022 09:00:56 -0700 (PDT) Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 28JDBTj9025635; Mon, 19 Sep 2022 16:00:51 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=Ij81E1OQlgZvSM3xquEVml12KCb9/5N2KS1Kns1QJh4=; b=QQTycDRpUQGkJC2MG7+dufSJkAUUfAHxXkCo/VnTXRcM52fFWAC2m38z8C5ZhzhlDb80 7wKd5SxZ/YqqUX0hQ3A+cC/iYHWkmuBPKSSVr1LfHEOCKftHd7ArU1E/HXEsw3QPpQI0 x58FlqkHgvI2WXaZs5BG6nX2CFXlV6lDqNhBLjSMF7TdAx1ohv+JUF81aK95KoTXrz2s ryXTgZfrpQFiVSeFxkInARGdo9r41cWz9f+yHw3d9LCcaLjHtKILTpSVZ+6vwWx6Q+N7 8qF9WBhpSMu7c5LkzNuWH6TAKo1DCLOm/01Ksj/BCry2rGPaY2mSijpcqFCNFf/K18JI aA== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3jn7dsd5ru-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Sep 2022 16:00:51 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 28JG0oil023813 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Sep 2022 16:00:50 GMT Received: from hu-gokukris-sd.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 15.2.986.29; Mon, 19 Sep 2022 09:00:50 -0700 From: Gokul krishna Krishnakumar To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Mathieu Poirier CC: , , , Trilok Soni , "Satya Durga Srinivasu Prabhala" , Rajendra Nayak , Elliot Berman , "Guru Das Srinagesh" , Gokul krishna Krishnakumar Subject: [PATCH v1 1/3] remoteproc: qcom: q6v5: Send subdevice notifications before panic Date: Mon, 19 Sep 2022 09:00:38 -0700 Message-ID: <842a6b6307d26874959d29f2065aad544ff0b86c.1662995608.git.quic_gokukris@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.80.80.8] 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: 08IetkVuAK_U1fBnlTzCOGE1fyxrxxy4 X-Proofpoint-GUID: 08IetkVuAK_U1fBnlTzCOGE1fyxrxxy4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-19_05,2022-09-16_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 spamscore=0 bulkscore=0 malwarescore=0 clxscore=1015 priorityscore=1501 phishscore=0 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2209190107 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Message-ID: <20220919160038.BpIS2NZaQrI47MsQsuXtUhMXeHK8i_QzPnEO1X01qKQ@z> Subdevice notifications after a remoteproc has crashed are useful to any clients that might want to preserve data pertaining to the driver after the remoteproc crashed. Sending subdevice notifications before triggering a kernel panic gives these drivers the time to do collect this information. Change-Id: Id6e55fb038b70f54ff5854d2adff72b74b6a9570 Signed-off-by: Gokul krishna Krishnakumar --- drivers/remoteproc/qcom_q6v5.c | 31 +++++++++++++++++++++++++++++++ drivers/remoteproc/qcom_q6v5.h | 2 ++ 2 files changed, 33 insertions(+) diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c index 497acfb..89f5384 100644 --- a/drivers/remoteproc/qcom_q6v5.c +++ b/drivers/remoteproc/qcom_q6v5.c @@ -15,6 +15,7 @@ #include #include #include +#include #include "qcom_common.h" #include "qcom_q6v5.h" @@ -94,6 +95,29 @@ int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5) } EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare); +static void qcom_q6v5_crash_handler_work(struct work_struct *work) +{ + struct qcom_q6v5 *q6v5 = container_of(work, struct qcom_q6v5, crash_handler); + struct rproc *rproc = q6v5->rproc; + struct rproc_subdev *subdev; + + mutex_lock(&rproc->lock); + + list_for_each_entry_reverse(subdev, &rproc->subdevs, node) { + if (subdev->stop) + subdev->stop(subdev, true); + } + + mutex_unlock(&rproc->lock); + + /* + * Temporary workaround until ramdump userspace application calls + * sync() and fclose() on attempting the dump. + */ + msleep(100); + panic("Panicking, remoteproc %s crashed\n", q6v5->rproc->name); +} + static irqreturn_t q6v5_wdog_interrupt(int irq, void *data) { struct qcom_q6v5 *q6v5 = data; @@ -113,6 +137,9 @@ static irqreturn_t q6v5_wdog_interrupt(int irq, void *data) dev_err(q6v5->dev, "watchdog without message\n"); q6v5->running = false; + if (q6v5->rproc->recovery_disabled) + schedule_work(&q6v5->crash_handler); + rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG); return IRQ_HANDLED; @@ -134,6 +161,9 @@ static irqreturn_t q6v5_fatal_interrupt(int irq, void *data) dev_err(q6v5->dev, "fatal error without message\n"); q6v5->running = false; + if (q6v5->rproc->recovery_disabled) + schedule_work(&q6v5->crash_handler); + rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR); return IRQ_HANDLED; @@ -354,6 +384,7 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev, if (IS_ERR(q6v5->path)) return dev_err_probe(&pdev->dev, PTR_ERR(q6v5->path), "failed to acquire interconnect path\n"); + INIT_WORK(&q6v5->crash_handler, qcom_q6v5_crash_handler_work); return 0; } diff --git a/drivers/remoteproc/qcom_q6v5.h b/drivers/remoteproc/qcom_q6v5.h index 5a859c4..b1654be 100644 --- a/drivers/remoteproc/qcom_q6v5.h +++ b/drivers/remoteproc/qcom_q6v5.h @@ -29,6 +29,8 @@ struct qcom_q6v5 { int handover_irq; int stop_irq; + struct work_struct crash_handler; + bool handover_issued; struct completion start_done; -- 2.7.4