From patchwork Sun Jan 15 11:41:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Kurapati X-Patchwork-Id: 645026 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 AC1B4C63797 for ; Sun, 15 Jan 2023 11:42:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231330AbjAOLmx (ORCPT ); Sun, 15 Jan 2023 06:42:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231322AbjAOLmh (ORCPT ); Sun, 15 Jan 2023 06:42:37 -0500 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6E5E10AB4; Sun, 15 Jan 2023 03:42:27 -0800 (PST) Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30FBfYoR031326; Sun, 15 Jan 2023 11:42:21 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=PNdGxiik0YwLZud8eZQUu8pnCZrUdYV3P2gpgyxIOvY=; b=khz1mQiA5TmjbACNUrtVeoo95LDICa6w70nyKW5qKLfa0I/qNwZ3WT0RbjKh1EmxDWtF AaXpN6F86GSQULFSb0PVa3VqTMffw6U3RxTX62M4G3MBGZHTkJsd1HQcpV1y5cjh71O8 r8iAhXTRbel26m7QaKG6sti+ChU/xUGpsOIrHyX6TonEEOFMLfQARBcz6RjR3I60bVNA gAuTEtiCooCryOtMIH6tCH+KGlscCDwpYtt/g/wRCPkd0/WDHLjEaYQ8la5uEfeHQ9Mb Pxs1psdBZOSOEDdngYd6HPdyR72pQIpkboRwNEWM2SWEH+zIUgMYyCZYIsELXjj9wq55 hw== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3n3hrwa37u-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 15 Jan 2023 11:42:20 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 30FBgJDS020044 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 15 Jan 2023 11:42:19 GMT Received: from hu-kriskura-hyd.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 15.2.986.36; Sun, 15 Jan 2023 03:42:13 -0800 From: Krishna Kurapati To: Thinh Nguyen , Greg Kroah-Hartman , Philipp Zabel , "Andy Gross" , Bjorn Andersson , "Konrad Dybcio" , Rob Herring , Krzysztof Kozlowski , Felipe Balbi CC: , , , , , , , , , Krishna Kurapati Subject: [RFC v4 3/5] usb: dwc3: core: Do not setup event buffers for host only controllers Date: Sun, 15 Jan 2023 17:11:44 +0530 Message-ID: <20230115114146.12628-4-quic_kriskura@quicinc.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230115114146.12628-1-quic_kriskura@quicinc.com> References: <20230115114146.12628-1-quic_kriskura@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) 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-GUID: WWQlkn-AY0E0G02pHc3SH2SVn9z-uuQ9 X-Proofpoint-ORIG-GUID: WWQlkn-AY0E0G02pHc3SH2SVn9z-uuQ9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.923,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-15_07,2023-01-13_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 clxscore=1015 malwarescore=0 suspectscore=0 mlxlogscore=724 impostorscore=0 spamscore=0 priorityscore=1501 phishscore=0 bulkscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301150089 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Multiport controllers being host-only capable do not have GEVNTADDR HI/LO, SIZE, COUNT reigsters present. Accsesing them to setup event buffers during core_init can cause an SMMU Fault. Avoid event buffers setup if the GHWPARAMS0 tells that the controller is host-only. Signed-off-by: Krishna Kurapati --- drivers/usb/dwc3/core.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 7e0a9a598dfd..f61ebddaecc0 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -871,9 +871,12 @@ static void dwc3_clk_disable(struct dwc3 *dwc) static void dwc3_core_exit(struct dwc3 *dwc) { - int i; + int i; + unsigned int hw_mode; - dwc3_event_buffers_cleanup(dwc); + hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) + dwc3_event_buffers_cleanup(dwc); usb_phy_set_suspend(dwc->usb2_phy, 1); usb_phy_set_suspend(dwc->usb3_phy, 1); @@ -1246,10 +1249,12 @@ static int dwc3_core_init(struct dwc3 *dwc) } } - ret = dwc3_event_buffers_setup(dwc); - if (ret) { - dev_err(dwc->dev, "failed to setup event buffers\n"); - goto err4; + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) { + ret = dwc3_event_buffers_setup(dwc); + if (ret) { + dev_err(dwc->dev, "failed to setup event buffers\n"); + goto err4; + } } /* @@ -1886,7 +1891,7 @@ static int dwc3_probe(struct platform_device *pdev) struct resource *res, dwc_res; struct dwc3 *dwc; int ret, i; - + unsigned int hw_mode; void __iomem *regs; dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL); @@ -2063,7 +2068,9 @@ static int dwc3_probe(struct platform_device *pdev) err5: dwc3_debugfs_exit(dwc); - dwc3_event_buffers_cleanup(dwc); + hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) + dwc3_event_buffers_cleanup(dwc); usb_phy_set_suspend(dwc->usb2_phy, 1); usb_phy_set_suspend(dwc->usb3_phy, 1);