From patchwork Thu Mar 23 19:15:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 74183 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:604a:0:0:0:0:0 with SMTP id j10csp3091659wrt; Thu, 23 Mar 2023 12:21:51 -0700 (PDT) Authentication-Results: mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=Zypnxxwj X-Google-Smtp-Source: AK7set9UQtgCadDwGsBH59gNWIJIgMDvWT4S40/gdg9dpHtbkHdWdp/wWwuwSM985Pk3Jhp2SazU X-Received: by 2002:a17:90a:520c:b0:23f:618a:6bec with SMTP id v12-20020a17090a520c00b0023f618a6becmr8070557pjh.49.1679599311197; Thu, 23 Mar 2023 12:21:51 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1679599311; cv=none; d=google.com; s=arc-20160816; b=gIZlOCFL01VCLjovoTVoNf7i1LdJ1OiVgEvTTjhq0Bknx2CSXGo29FFLyR79XzrhpD Igp0AnFZR8InXMshUAvco8ib5/PPyBLj0+8aseQtWpSB7KyG+EonNjk4RMWfaF0GEFKH csOei8kiCVrr/kW2LFn9KnDSplwINHkT/O6gqgjqINZUbD8Ey7a2lQDIVQ/ym5FqQULv 7YWZ1CYz9H8EmvOkBpnmSBU3ydsp/Z0UcXJBfZP8uyIm7V6/hU97wONqWbiDH7uKTDg3 0y69x3JD90UI8QRKA6TtQPRygysZfj2JfjW/XrVXyP39+LJLgu6blT1cJmWU7pnk/QME H3kQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=AsLuWZMU0pEXcJlZrbFHzc7hyBlA/hDA5NWZw9Nnua0=; b=vy3iCVq50Jm59HNglO9WZeHHvLDpotzskP2rt50QUJFLGSF7GwCCE/U7TrrDJxxD9Q Jrskv0jbE6XYwqeHAxtHZ60q3cmKfdnrr4FZ9AVxVySUKcDvyKQGO1lIwYGcVYPIh4Ew lfYVRXHjw77O/2Q9UoRe8SMvoKXBH1mH0R9idGtWANsQGeClcggGhPZzhhN1oON0vVlB wLMdVWDcE/4N0TKlvNH+QRXrYRetF/d1NjOVg5dyzJKwr4Y1+9XfFwwpJUkIbb7MTxPY /svb+gjDKSm/bw8Pz7A+SGQThSGZj8jVYZX14ewiwlEpSV95DnRzCJ+QICmz7jRJGHpW XaQg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=Zypnxxwj; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=quicinc.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id h15-20020a17090a648f00b00234ac7c8061si2483975pjj.175.2023.03.23.12.21.37; Thu, 23 Mar 2023 12:21:51 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=Zypnxxwj; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=quicinc.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231649AbjCWTQS (ORCPT + 99 others); Thu, 23 Mar 2023 15:16:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230399AbjCWTQN (ORCPT ); Thu, 23 Mar 2023 15:16:13 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 972C19000; Thu, 23 Mar 2023 12:16:12 -0700 (PDT) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32NJ0Iuk026875; Thu, 23 Mar 2023 19:16:08 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=AsLuWZMU0pEXcJlZrbFHzc7hyBlA/hDA5NWZw9Nnua0=; b=Zypnxxwjo+Hr7M4zzmbQ69wqnivBcUAY4c/aPoIksT382qE5yXCtYSI1NRd+51f/xzht uVZ8FMXijvx9GPu7ybyx4kKGJXH5Zj/8aBl4yxPzLcuUbRe/SHyRls7+xzLEK493EY19 NKrwyST8eRvxpzr5Bn18TdiptR1lqAMkOVBvaGfkEn/htSAqD2vDy9TSDHdZgd2cwxmo p0TZjON2Neo2BiDyE++g0cDcK/0IyWG5CMpNQVEQHh21GUBHCwWeDFWVZmAZIRGoTNtZ wKE0OC0j1kMwD+hdFQHPVO8q4TMdPWKZxHQ3wZEkfjDSTHlZ8hnYzmbY0aUMYMibv6G+ fw== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3pgfv6a42m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 23 Mar 2023 19:16:08 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 32NJG81i019385 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 23 Mar 2023 19:16:08 GMT Received: from hu-eberman-lv.qualcomm.com (10.49.16.6) 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 15.2.986.41; Thu, 23 Mar 2023 12:16:07 -0700 From: Elliot Berman To: Jassi Brar , Sudeep Holla CC: Elliot Berman , , , Subject: [PATCH v2 3/3] mailbox: pcc: Use mbox_bind_client Date: Thu, 23 Mar 2023 12:15:27 -0700 Message-ID: <20230323191527.1472695-4-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230323191527.1472695-1-quic_eberman@quicinc.com> References: <20230323191527.1472695-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) 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-GUID: dhYEWwJk9JL_NKKvzPjdnsCS3gGzx6lw X-Proofpoint-ORIG-GUID: dhYEWwJk9JL_NKKvzPjdnsCS3gGzx6lw 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=2023-03-23_12,2023-03-23_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 adultscore=0 mlxlogscore=665 malwarescore=0 mlxscore=0 lowpriorityscore=0 spamscore=0 phishscore=0 impostorscore=0 clxscore=1015 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303150002 definitions=main-2303230141 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1761187527171767821?= X-GMAIL-MSGID: =?utf-8?q?1761187527171767821?= Use generic mbox_bind_client() to bind omap mailbox channel to a client. mbox_bind_client is identical to the replaced lines, except that it: - Does the operation under con_mutex which prevents possible races in removal path - Sets TXDONE_BY_ACK if pcc uses TXDONE_BY_POLL and the client knows when tx is done. TXDONE_BY_ACK is already set if there's no interrupt, so this is not applicable. - Calls chan->mbox->ops->startup. This is usecase for requesting irq: move the devm_request_irq into the startup callback and unregister it in the shutdown path. Tested-by: Sudeep Holla Signed-off-by: Elliot Berman --- drivers/mailbox/pcc.c | 82 ++++++++++++++++++++++++------------------- 1 file changed, 45 insertions(+), 37 deletions(-) diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c index 105d46c9801b..3a025415c5d5 100644 --- a/drivers/mailbox/pcc.c +++ b/drivers/mailbox/pcc.c @@ -283,7 +283,7 @@ pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id) struct pcc_chan_info *pchan; struct mbox_chan *chan; struct device *dev; - unsigned long flags; + int rc; if (subspace_id < 0 || subspace_id >= pcc_chan_count) return ERR_PTR(-ENOENT); @@ -296,30 +296,9 @@ pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id) } dev = chan->mbox->dev; - spin_lock_irqsave(&chan->lock, flags); - chan->msg_free = 0; - chan->msg_count = 0; - chan->active_req = NULL; - chan->cl = cl; - init_completion(&chan->tx_complete); - - if (chan->txdone_method == TXDONE_BY_POLL && cl->knows_txdone) - chan->txdone_method = TXDONE_BY_ACK; - - spin_unlock_irqrestore(&chan->lock, flags); - - if (pchan->plat_irq > 0) { - int rc; - - rc = devm_request_irq(dev, pchan->plat_irq, pcc_mbox_irq, 0, - MBOX_IRQ_NAME, chan); - if (unlikely(rc)) { - dev_err(dev, "failed to register PCC interrupt %d\n", - pchan->plat_irq); - pcc_mbox_free_channel(&pchan->chan); - return ERR_PTR(rc); - } - } + rc = mbox_bind_client(chan, cl); + if (rc) + return ERR_PTR(rc); return &pchan->chan; } @@ -333,23 +312,12 @@ EXPORT_SYMBOL_GPL(pcc_mbox_request_channel); */ void pcc_mbox_free_channel(struct pcc_mbox_chan *pchan) { - struct pcc_chan_info *pchan_info = to_pcc_chan_info(pchan); struct mbox_chan *chan = pchan->mchan; - unsigned long flags; if (!chan || !chan->cl) return; - if (pchan_info->plat_irq > 0) - devm_free_irq(chan->mbox->dev, pchan_info->plat_irq, chan); - - spin_lock_irqsave(&chan->lock, flags); - chan->cl = NULL; - chan->active_req = NULL; - if (chan->txdone_method == TXDONE_BY_ACK) - chan->txdone_method = TXDONE_BY_POLL; - - spin_unlock_irqrestore(&chan->lock, flags); + mbox_free_channel(chan); } EXPORT_SYMBOL_GPL(pcc_mbox_free_channel); @@ -377,8 +345,48 @@ static int pcc_send_data(struct mbox_chan *chan, void *data) return pcc_chan_reg_read_modify_write(&pchan->db); } +/** + * pcc_startup - Called from Mailbox Controller code. Used here + * to request the interrupt. + * @chan: Pointer to Mailbox channel to startup. + * + * Return: Err if something failed else 0 for success. + */ +int pcc_startup(struct mbox_chan *chan) +{ + struct pcc_chan_info *pchan = chan->con_priv; + int rc; + + if (pchan->plat_irq > 0) { + rc = devm_request_irq(chan->mbox->dev, pchan->plat_irq, pcc_mbox_irq, 0, + MBOX_IRQ_NAME, chan); + if (unlikely(rc)) { + dev_err(chan->mbox->dev, "failed to register PCC interrupt %d\n", + pchan->plat_irq); + return rc; + } + } + + return 0; +} + +/** + * pcc_shutdown - Called from Mailbox Controller code. Used here + * to free the interrupt. + * @chan: Pointer to Mailbox channel to shutdown. + */ +void pcc_shutdown(struct mbox_chan *chan) +{ + struct pcc_chan_info *pchan = chan->con_priv; + + if (pchan->plat_irq > 0) + devm_free_irq(chan->mbox->dev, pchan->plat_irq, chan); +} + static const struct mbox_chan_ops pcc_chan_ops = { .send_data = pcc_send_data, + .startup = pcc_startup, + .shutdown = pcc_shutdown, }; /**