From patchwork Tue Aug 30 22:25:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guru Das Srinagesh X-Patchwork-Id: 601901 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 A2857ECAAA1 for ; Tue, 30 Aug 2022 22:27:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232422AbiH3W1Z (ORCPT ); Tue, 30 Aug 2022 18:27:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232152AbiH3W05 (ORCPT ); Tue, 30 Aug 2022 18:26:57 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C94335F202; Tue, 30 Aug 2022 15:25:32 -0700 (PDT) Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 27UKnHt9018087; Tue, 30 Aug 2022 22:25:20 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=E0OVYP5v1R1xQJJorOW590/QSlnrwFy0QK0M4kKysOQ=; b=DX4Wo+J76F3pBkUCwVUqWyM9/fWstPEvrtSAJNPvc/PYr2o4Gj7nlgOVJJyNxEE6MaFQ 8FOyHysiGWe+Pb9HL0UAANl3WZ4mLQ27DC7z8gAJ6VKaeM5tkFFadqnlXUqARpG+atFG w3sTxsdDtIhgiofvv54TyjhTv2c1Db6nx7NVvYgLYes6SBcwIo5T8LwcnY7zYsZ2vwCx NbPW11Qp4EY5VJb3FOjbzNkqLzxx3qfashaqqJAAYw1O9w7eNwMmjVgURLu6B3JMOxPp cNRvOTJqcLt+Og5SfJgCpW8H6cVjA0XlqNSTM8K1wGJUz4rFmiq60ToXWRr8pnXH5FGT 6Q== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3j9mwg1e9j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 30 Aug 2022 22:25:19 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 27UMPJJt010683 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 30 Aug 2022 22:25:19 GMT Received: from hu-gurus-sd.qualcomm.com (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.29; Tue, 30 Aug 2022 15:25:19 -0700 From: Guru Das Srinagesh To: Andy Gross , Bjorn Andersson , Philipp Zabel , , CC: David Heidelberg , Robert Marko , Rajendra Nayak , Elliot Berman , Guru Das Srinagesh Subject: [RESEND PATCH v2 2/5] firmware: qcom: scm: Optionally remove SCM call serialization Date: Tue, 30 Aug 2022 15:25:08 -0700 Message-ID: <1661898311-30126-3-git-send-email-quic_gurus@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1661898311-30126-1-git-send-email-quic_gurus@quicinc.com> References: <1661898311-30126-1-git-send-email-quic_gurus@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: zi3BVz5VUYQEQSHagPXKDC5qRrt-YZeZ X-Proofpoint-GUID: zi3BVz5VUYQEQSHagPXKDC5qRrt-YZeZ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-30_12,2022-08-30_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 mlxscore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=999 malwarescore=0 bulkscore=0 suspectscore=0 spamscore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208300100 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Some firmware versions support the handling of multiple SCM calls at the same time. Add a device tree boolean property which, when specified, allows this to happen. Signed-off-by: Guru Das Srinagesh --- drivers/firmware/qcom_scm-smc.c | 8 ++++++-- drivers/firmware/qcom_scm.c | 6 ++++++ drivers/firmware/qcom_scm.h | 2 ++ 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/qcom_scm-smc.c b/drivers/firmware/qcom_scm-smc.c index d111833..66193c2 100644 --- a/drivers/firmware/qcom_scm-smc.c +++ b/drivers/firmware/qcom_scm-smc.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2015,2019 The Linux Foundation. All rights reserved. + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. */ #include @@ -63,11 +64,14 @@ static void __scm_smc_do(const struct arm_smccc_args *smc, } do { - mutex_lock(&qcom_scm_lock); + if (!qcom_scm_allow_multicall) + mutex_lock(&qcom_scm_lock); __scm_smc_do_quirk(smc, res); - mutex_unlock(&qcom_scm_lock); + if (!qcom_scm_allow_multicall) + mutex_unlock(&qcom_scm_lock); + if (res->a0 == QCOM_SCM_V2_EBUSY) { if (retry_count++ > QCOM_SCM_EBUSY_MAX_RETRY) diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index cdbfe54..978706a 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2010,2015,2019 The Linux Foundation. All rights reserved. * Copyright (C) 2015 Linaro Ltd. + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. */ #include #include @@ -23,6 +24,8 @@ static bool download_mode = IS_ENABLED(CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT); module_param(download_mode, bool, 0); +bool qcom_scm_allow_multicall = false; + #define SCM_HAS_CORE_CLK BIT(0) #define SCM_HAS_IFACE_CLK BIT(1) #define SCM_HAS_BUS_CLK BIT(2) @@ -1402,6 +1405,9 @@ static int qcom_scm_probe(struct platform_device *pdev) __scm = scm; __scm->dev = &pdev->dev; + qcom_scm_allow_multicall = of_property_read_bool(__scm->dev->of_node, + "allow-multi-call"); + __get_convention(); /* diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h index 0d51eef..c0a4d6b 100644 --- a/drivers/firmware/qcom_scm.h +++ b/drivers/firmware/qcom_scm.h @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ /* Copyright (c) 2010-2015,2019 The Linux Foundation. All rights reserved. + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. */ #ifndef __QCOM_SCM_INT_H #define __QCOM_SCM_INT_H @@ -12,6 +13,7 @@ enum qcom_scm_convention { }; extern enum qcom_scm_convention qcom_scm_convention; +extern bool qcom_scm_allow_multicall; #define MAX_QCOM_SCM_ARGS 10 #define MAX_QCOM_SCM_RETS 3