From patchwork Thu Sep 12 19:39:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 827886 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5042C1C1720; Thu, 12 Sep 2024 19:40:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726170020; cv=none; b=dPfrvdRumFji0qpGGqKxINvZQtr/1+B+cUrsX4YYbyYKrMlzw60Qw3BDSahzTRAOe8DbnTILqVCY5LPj8uWWJGCgj7ZQCfGPL+eAPPHHznZ+f9rvYVy5Ro0CczZ8STA42xmnU1eb1yqoiJqjCSIajASn3OAE1/0dii213U43oAs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726170020; c=relaxed/simple; bh=19su1qXWAKPGI9nwEcxwU/Dvq58ixpUJWO1wC6V0R7Q=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=uidShlg7RCTcy9smCWJUhPodBImk+yO0b05iexiiAclrVh1gs1MaUBgLtD1elFET5ZFOk/dx89jiOey1vcpRBVITcG788j+tlck1vOpTxI3OduTF5+izlQQEDhBo6gVEwZPvlwvM92t6SKoLzpFdzJq2X4IFvJQVuNVyyImOxxY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=Og6LlXYv; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="Og6LlXYv" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 48CHsjJm024952; Thu, 12 Sep 2024 19:39:48 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= hDoekVNAP6M6qLhIu4alsRJxfF35Lk/5fkc+3BcUnnM=; b=Og6LlXYvdJ1iwQEY TtX8Lfl8yf+mLH/TY4F3dCBT3GQwccDw6PCMKDiCWhbSKIlXHeqYgud6UOUkXm7u jS4KAsb8gFdR0c7a+bapHNu98Wq7NNEKWWQwuBP3abZt6Fd3oIN9u9/8jpby1CyI 8LPiIrZMWh7hXG5kKIGIYi8ypM++Vs2lW74YOwcFAu7xv99PICWUfTwjE5ECIFUK 3vXLtbid97aGPgWiDhvLe+G5GXH0RxRsvNni5OT6VO1TTL2GBuFwvmbzeXSx5dPZ JnrGjrt0ItU/PFSkfm4qWyiArdZ1lCr5nPJIIuMB9nP1Ix9ipj6Ndz7J8cQvq5te GRsg5Q== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 41gybpxd1g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 12 Sep 2024 19:39:47 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 48CJdkjf005803 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 12 Sep 2024 19:39:47 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 15.2.1544.9; Thu, 12 Sep 2024 12:39:46 -0700 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , , Mathias Nyman , Wesley Cheng Subject: [PATCH v27 01/32] xhci: add helper to stop endpoint and wait for completion Date: Thu, 12 Sep 2024 12:39:04 -0700 Message-ID: <20240912193935.1916426-2-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240912193935.1916426-1-quic_wcheng@quicinc.com> References: <20240912193935.1916426-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: 4TznVF8B9d28Cj-if5ZH2IfyiH2sxchn X-Proofpoint-GUID: 4TznVF8B9d28Cj-if5ZH2IfyiH2sxchn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 spamscore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=999 clxscore=1015 bulkscore=0 impostorscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409120144 From: Mathias Nyman Expose xhci_stop_endpoint_sync() which is a synchronous variant of xhci_queue_stop_endpoint(). This is useful for client drivers that are using the secondary interrupters, and need to stop/clean up the current session. The stop endpoint command handler will also take care of cleaning up the ring. Signed-off-by: Mathias Nyman Signed-off-by: Wesley Cheng --- drivers/usb/host/xhci.c | 39 +++++++++++++++++++++++++++++++++++++++ drivers/usb/host/xhci.h | 2 ++ 2 files changed, 41 insertions(+) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index ed1bb7ed44b0..1fafba95d407 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -2784,6 +2784,45 @@ static int xhci_reserve_bandwidth(struct xhci_hcd *xhci, return -ENOMEM; } +/* + * Synchronous XHCI stop endpoint helper. Issues the stop endpoint command and + * waits for the command completion before returning. + */ +int xhci_stop_endpoint_sync(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, int suspend, + gfp_t gfp_flags) +{ + struct xhci_command *command; + unsigned long flags; + int ret; + + command = xhci_alloc_command(xhci, true, gfp_flags); + if (!command) + return -ENOMEM; + + spin_lock_irqsave(&xhci->lock, flags); + ret = xhci_queue_stop_endpoint(xhci, command, ep->vdev->slot_id, + ep->ep_index, suspend); + if (ret < 0) { + spin_unlock_irqrestore(&xhci->lock, flags); + goto out; + } + + xhci_ring_cmd_db(xhci); + spin_unlock_irqrestore(&xhci->lock, flags); + + wait_for_completion(command->completion); + + if (command->status == COMP_COMMAND_ABORTED || + command->status == COMP_COMMAND_RING_STOPPED) { + xhci_warn(xhci, "Timeout while waiting for stop endpoint command\n"); + ret = -ETIME; + } +out: + xhci_free_command(xhci, command); + + return ret; +} +EXPORT_SYMBOL_GPL(xhci_stop_endpoint_sync); /* Issue a configure endpoint command or evaluate context command * and wait for it to finish. diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 324644165d93..51a992d8ffcf 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1917,6 +1917,8 @@ void xhci_ring_doorbell_for_active_rings(struct xhci_hcd *xhci, void xhci_cleanup_command_queue(struct xhci_hcd *xhci); void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring); unsigned int count_trbs(u64 addr, u64 len); +int xhci_stop_endpoint_sync(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, + int suspend, gfp_t gfp_flags); /* xHCI roothub code */ void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,