From patchwork Wed May 10 01:47:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linyu Yuan X-Patchwork-Id: 681149 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 6370DC7EE22 for ; Wed, 10 May 2023 01:47:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235398AbjEJBrg (ORCPT ); Tue, 9 May 2023 21:47:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229549AbjEJBrf (ORCPT ); Tue, 9 May 2023 21:47:35 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6ED5B3A85 for ; Tue, 9 May 2023 18:47:34 -0700 (PDT) Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34A06vLf002826; Wed, 10 May 2023 01:47:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=dPVcosi5ByQRRF5hwT/iU3kSoFuNXYnmaK+ZwQJ9Hbc=; b=BOfhA9mcw8ctBDbqH+bKsohtZ2S6OWB3PYfkZ7tzFz6FUf8j4xt0/fQxfx0rtPW5eQRo CynVN/HNN33tzrNl+vw1lhOXy4yVCTfnY6HrP8qKG0WGU+youTPF99uSm6xbLk4fimkP Rj2B/3yWCXKfD/i4Dmb0eUdpUYfYaodNTg1XzoHsQO1uKQnIYJNiC4ao0FfdORlAKK0h 8hIPvTA6CFJfrg9T2LQmBTCAOfGAtDiDJebswy9g0IRexv3DFA4qfqW21t6yDfEcQhfa ChiXEsk2Zl2Gv5svUPPPcCCCU8qDA7+LIak5OnLmn/28vs2kgd4P18fIj3DoFJYAwe3v CA== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qfw3d0f0w-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 01:47:30 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 34A1lTFq017497 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 01:47:29 GMT Received: from linyyuan-gv.qualcomm.com (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Tue, 9 May 2023 18:47:27 -0700 From: Linyu Yuan To: Thinh Nguyen , Greg Kroah-Hartman CC: , Linyu Yuan Subject: [PATCH v8] usb: dwc3: fix gadget mode suspend interrupt handler issue Date: Wed, 10 May 2023 09:47:18 +0800 Message-ID: <20230510014718.13872-1-quic_linyyuan@quicinc.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 9PEuCAPYytFwD5Dk3eX06X5wAn5XuMID X-Proofpoint-GUID: 9PEuCAPYytFwD5Dk3eX06X5wAn5XuMID X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-09_16,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 malwarescore=0 impostorscore=0 adultscore=0 mlxlogscore=999 mlxscore=0 bulkscore=0 suspectscore=0 phishscore=0 spamscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305100011 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org When work in gadget mode, currently driver doesn't update software level link_state correctly as link state change event is not enabled for most devices, in function dwc3_gadget_suspend_interrupt(), it will only pass suspend event to UDC core when software level link state changes, so when interrupt generated in sequences of suspend -> reset -> conndone -> suspend, link state is not updated during reset and conndone, so second suspend interrupt event will not pass to UDC core. Remove link_state compare in dwc3_gadget_suspend_interrupt() and add a suspended flag to replace the compare function. Signed-off-by: Linyu Yuan --- v8: (refer v7 https://lore.kernel.org/linux-usb/20230509050743.5781-1-quic_linyyuan@quicinc.com/) 1) move some suspended flag clear to specific event handler v7: (refer v6 https://lore.kernel.org/linux-usb/20230505014902.27313-1-quic_linyyuan@quicinc.com/) 1) reword suspended flag comment 2) remove one extra space in if operation 4) clear suspended flag for wakeup/reset/disconnect interrupt 3) clear suspended flag for remote wakeup related case. v6: (refer v5 https://lore.kernel.org/linux-usb/1682476780-2367-1-git-send-email-quic_linyyuan@quicinc.com/) 1) change subject 2) only keep suspended flag related change v5: (refer v4 https://lore.kernel.org/linux-usb/1682393256-15572-1-git-send-email-quic_linyyuan@quicinc.com/) 1) rename suspend_irq_happen to suspended and document it 2) add old_link_state for link change interrupt usage and change accordingly v4: (refer v3 https://lore.kernel.org/linux-usb/1682053861-21737-1-git-send-email-quic_linyyuan@quicinc.com/) 1) remove link state checking in dwc3_gadget_wakeup_interrupt() 2) remove two switch/case to if opeartion v3: (refer v2 https://lore.kernel.org/linux-usb/1682042472-21222-1-git-send-email-quic_linyyuan@quicinc.com/) no code change since v2, changes compare v1 as below, 1) add a flag suspend_irq_happen to simplify dwc3_gadget_suspend_interrupt(), it will avoid refer to software level link_state, finally link_state will only used in dwc3_gadget_linksts_change_interrupt(). 2) remove sw setting of link_state in dwc3_gadget_func_wakeup() 3) add dwc3_gadget_interrupt_early() to correct setting of link_state and suspend_irq_happen. drivers/usb/dwc3/core.h | 2 ++ drivers/usb/dwc3/gadget.c | 12 +++++++++++- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index d56457c02996..1f043c31a096 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1116,6 +1116,7 @@ struct dwc3_scratchpad_array { * @dis_metastability_quirk: set to disable metastability quirk. * @dis_split_quirk: set to disable split boundary. * @wakeup_configured: set if the device is configured for remote wakeup. + * @suspended: set to track suspend event due to U3/L2. * @imod_interval: set the interrupt moderation interval in 250ns * increments or 0 to disable. * @max_cfg_eps: current max number of IN eps used across all USB configs. @@ -1332,6 +1333,7 @@ struct dwc3 { unsigned dis_split_quirk:1; unsigned async_callbacks:1; unsigned wakeup_configured:1; + unsigned suspended:1; u16 imod_interval; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index c0ca4d12f95d..f244bebf1ea0 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2440,6 +2440,7 @@ static int dwc3_gadget_func_wakeup(struct usb_gadget *g, int intf_id) return -EINVAL; } dwc3_resume_gadget(dwc); + dwc->suspended = false; dwc->link_state = DWC3_LINK_STATE_U0; } @@ -3938,6 +3939,8 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) { int reg; + dwc->suspended = false; + dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RX_DET); reg = dwc3_readl(dwc->regs, DWC3_DCTL); @@ -3962,6 +3965,8 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) { u32 reg; + dwc->suspended = false; + /* * Ideally, dwc3_reset_gadget() would trigger the function * drivers to stop any active transfers through ep disable. @@ -4180,6 +4185,8 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc, unsigned int evtinfo) { + dwc->suspended = false; + /* * TODO take core out of low power mode when that's * implemented. @@ -4277,6 +4284,7 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, if (dwc->gadget->wakeup_armed) { dwc3_gadget_enable_linksts_evts(dwc, false); dwc3_resume_gadget(dwc); + dwc->suspended = false; } break; case DWC3_LINK_STATE_U1: @@ -4303,8 +4311,10 @@ static void dwc3_gadget_suspend_interrupt(struct dwc3 *dwc, { enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; - if (dwc->link_state != next && next == DWC3_LINK_STATE_U3) + if (!dwc->suspended && next == DWC3_LINK_STATE_U3) { + dwc->suspended = true; dwc3_suspend_gadget(dwc); + } dwc->link_state = next; }