From patchwork Thu Apr 20 21:27:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 676290 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 5E64AC7618E for ; Thu, 20 Apr 2023 21:28:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232252AbjDTV2a (ORCPT ); Thu, 20 Apr 2023 17:28:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230200AbjDTV23 (ORCPT ); Thu, 20 Apr 2023 17:28:29 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3D806559E; Thu, 20 Apr 2023 14:28:26 -0700 (PDT) Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 33KLHdMf020200; Thu, 20 Apr 2023 21:28:12 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=E4WRIbiPJ+c0ww+ET8b+VeBOgy8qXQW/56nTRsr7oac=; b=W5TP+j81lYWfk89bg3vLakJYCshHUyskI9mp1ApUUzruhhSSKrvIin1KmdJANZcP3EzA /Q7CSggjkITJwS3eP7nZyOnIlE/bTwAuD9aADiBD64UxVhRWDnFiqGPhXftduUzHs52V M9j9UAGeihijt1KKMDUY91MENC6PE+249bSleHOTEGAl027jlgOIVya5WQZYyyFfNDNG XG6VxkvgkapuVbmpMhkvwm40eCqYvQVSV7Ue5nqWR8YQ1bdhIb8yU/3k4kWtFTBFQEnb VXpdVqlFoalxhevfJxOgB/sxwkC539gem4vHE7wya6ybQDA3PN3hEstsWFX0O4eAf+u1 qA== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3q2xuht87a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 20 Apr 2023 21:28:12 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 33KLSBi0018090 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 20 Apr 2023 21:28:11 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) 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; Thu, 20 Apr 2023 14:28:11 -0700 From: Wesley Cheng To: , CC: , , , Wesley Cheng , Subject: [PATCH v6 1/2] usb: dwc3: gadget: Execute gadget stop after halting the controller Date: Thu, 20 Apr 2023 14:27:58 -0700 Message-ID: <20230420212759.29429-2-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230420212759.29429-1-quic_wcheng@quicinc.com> References: <20230420212759.29429-1-quic_wcheng@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) 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: 1nnMtQUqeBs3Kj6D9BF_cIfcwp9btCkY X-Proofpoint-GUID: 1nnMtQUqeBs3Kj6D9BF_cIfcwp9btCkY 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=2023-04-20_15,2023-04-20_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 phishscore=0 spamscore=0 mlxscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 suspectscore=0 adultscore=0 priorityscore=1501 mlxlogscore=739 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304200180 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Do not call gadget stop until the poll for controller halt is completed. DEVTEN is cleared as part of gadget stop, so the intention to allow ep0 events to continue while waiting for controller halt is not happening. Fixes: c96683798e27 ("usb: dwc3: ep0: Don't prepare beyond Setup stage") Cc: stable@vger.kernel.org Acked-by: Thinh Nguyen Signed-off-by: Wesley Cheng --- drivers/usb/dwc3/gadget.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 9f492c8a7d0b..dd6057bad37e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2637,7 +2637,6 @@ static int dwc3_gadget_soft_disconnect(struct dwc3 *dwc) * bit. */ dwc3_stop_active_transfers(dwc); - __dwc3_gadget_stop(dwc); spin_unlock_irqrestore(&dwc->lock, flags); /* @@ -2674,7 +2673,19 @@ static int dwc3_gadget_soft_disconnect(struct dwc3 *dwc) * remaining event generated by the controller while polling for * DSTS.DEVCTLHLT. */ - return dwc3_gadget_run_stop(dwc, false); + ret = dwc3_gadget_run_stop(dwc, false); + + /* + * Stop the gadget after controller is halted, so that if needed, the + * events to update EP0 state can still occur while the run/stop + * routine polls for the halted state. DEVTEN is cleared as part of + * gadget stop. + */ + spin_lock_irqsave(&dwc->lock, flags); + __dwc3_gadget_stop(dwc); + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; } static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) From patchwork Thu Apr 20 21:27:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 675827 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 CBCAFC77B7C for ; Thu, 20 Apr 2023 21:28:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232114AbjDTV2S (ORCPT ); Thu, 20 Apr 2023 17:28:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229599AbjDTV2Q (ORCPT ); Thu, 20 Apr 2023 17:28:16 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25E5C123; Thu, 20 Apr 2023 14:28:14 -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 33KKxsgi028873; Thu, 20 Apr 2023 21:28:13 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=LOFtKFLMVks+F7LulyHPgP1bj+cLGOAEcseNlQgIlSs=; b=Fb5bXGHoCEQJx8FcTEtT1hJW3Xp1JrxhYFDeUL7JMz0Vm2vLuBbseBoeGOBARjfGqucf dCEA7MhRtKlAPaHKCavUAic5HhAiCZe/Msi/8KjtVoLuXTYpwtY5MZXltiWaiGRShWaq H6nP78TviKXmPnmynFUXcOFMukejuPYrPK1G56V2Dm2M7T7/50k46sI2GaQ5PU0xE4pE CVA6XgsRgv/ap8dR1E0Oo0GZkWhb1pAuTHSCEzw9Wfkz78WInZBsB6aGHdwjeCo6KXiT zJ0ciL17AXUqz/8wmxx0PYcAR0X7jgLAwY3UaZYcbIBMN/7CxM0JMfyCIa1jsmKEatRq EQ== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3q37qfru2a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 20 Apr 2023 21:28:12 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 33KLSBEU028409 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 20 Apr 2023 21:28:11 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) 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; Thu, 20 Apr 2023 14:28:11 -0700 From: Wesley Cheng To: , CC: , , , Wesley Cheng Subject: [PATCH v6 2/2] usb: dwc3: gadget: Refactor EP0 forced stall/restart into a separate API Date: Thu, 20 Apr 2023 14:27:59 -0700 Message-ID: <20230420212759.29429-3-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230420212759.29429-1-quic_wcheng@quicinc.com> References: <20230420212759.29429-1-quic_wcheng@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) 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-GUID: aNCF0UqBMJ1xC4u7YayGiLnRedgrqwDm X-Proofpoint-ORIG-GUID: aNCF0UqBMJ1xC4u7YayGiLnRedgrqwDm 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=2023-04-20_15,2023-04-20_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxscore=0 spamscore=0 clxscore=1015 phishscore=0 priorityscore=1501 bulkscore=0 mlxlogscore=946 impostorscore=0 adultscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304200180 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Several sequences utilize the same routine for forcing the control endpoint back into the SETUP phase. This is required, because those operations need to ensure that EP0 is back in the default state. Acked-by: Thinh Nguyen Signed-off-by: Wesley Cheng --- drivers/usb/dwc3/gadget.c | 53 ++++++++++++++++----------------------- 1 file changed, 21 insertions(+), 32 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index dd6057bad37e..c0ca4d12f95d 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -139,6 +139,24 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) return -ETIMEDOUT; } +static void dwc3_ep0_reset_state(struct dwc3 *dwc) +{ + unsigned int dir; + + if (dwc->ep0state != EP0_SETUP_PHASE) { + dir = !!dwc->ep0_expect_in; + if (dwc->ep0state == EP0_DATA_PHASE) + dwc3_ep0_end_control_data(dwc, dwc->eps[dir]); + else + dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]); + + dwc->eps[0]->trb_enqueue = 0; + dwc->eps[1]->trb_enqueue = 0; + + dwc3_ep0_stall_and_restart(dwc); + } +} + /** * dwc3_ep_inc_trb - increment a trb index. * @index: Pointer to the TRB index to increment. @@ -2652,16 +2670,9 @@ static int dwc3_gadget_soft_disconnect(struct dwc3 *dwc) ret = wait_for_completion_timeout(&dwc->ep0_in_setup, msecs_to_jiffies(DWC3_PULL_UP_TIMEOUT)); if (ret == 0) { - unsigned int dir; - dev_warn(dwc->dev, "wait for SETUP phase timed out\n"); spin_lock_irqsave(&dwc->lock, flags); - dir = !!dwc->ep0_expect_in; - if (dwc->ep0state == EP0_DATA_PHASE) - dwc3_ep0_end_control_data(dwc, dwc->eps[dir]); - else - dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]); - dwc3_ep0_stall_and_restart(dwc); + dwc3_ep0_reset_state(dwc); spin_unlock_irqrestore(&dwc->lock, flags); } } @@ -3944,16 +3955,7 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) dwc3_gadget_enable_linksts_evts(dwc, false); usb_gadget_set_state(dwc->gadget, USB_STATE_NOTATTACHED); - if (dwc->ep0state != EP0_SETUP_PHASE) { - unsigned int dir; - - dir = !!dwc->ep0_expect_in; - if (dwc->ep0state == EP0_DATA_PHASE) - dwc3_ep0_end_control_data(dwc, dwc->eps[dir]); - else - dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]); - dwc3_ep0_stall_and_restart(dwc); - } + dwc3_ep0_reset_state(dwc); } static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) @@ -4007,20 +4009,7 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) * phase. So ensure that EP0 is in setup phase by issuing a stall * and restart if EP0 is not in setup phase. */ - if (dwc->ep0state != EP0_SETUP_PHASE) { - unsigned int dir; - - dir = !!dwc->ep0_expect_in; - if (dwc->ep0state == EP0_DATA_PHASE) - dwc3_ep0_end_control_data(dwc, dwc->eps[dir]); - else - dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]); - - dwc->eps[0]->trb_enqueue = 0; - dwc->eps[1]->trb_enqueue = 0; - - dwc3_ep0_stall_and_restart(dwc); - } + dwc3_ep0_reset_state(dwc); /* * In the Synopsis DesignWare Cores USB3 Databook Rev. 3.30a