From patchwork Fri May 20 08:29:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 12856486 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 1FDDAC433F5 for ; Fri, 20 May 2022 08:30:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234699AbiETIat (ORCPT ); Fri, 20 May 2022 04:30:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347091AbiETIaf (ORCPT ); Fri, 20 May 2022 04:30:35 -0400 Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [185.132.182.106]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE17C14B676; Fri, 20 May 2022 01:30:06 -0700 (PDT) Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 24K3tLia028145; Fri, 20 May 2022 10:30:00 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=selector1; bh=ELzzZyzi9IIRB85sZHLytKa0QsJoVdFk2Y4D4aQAVAo=; b=1t9eTyznf9T4JFHDbh8VG8RC/ucYGYT01BYBBxUFQCAdBPo3LbaZpEV3B0VpJOlPT47Y z9zBj2dM1dBRFdWAKxNLiHvNgu2tqnfeo6SqIquE7wsdTU1ZFwIsUzIQ/xMisK5c2B5n owV16Vfe8v0KtNgQ0ppzZNoadAu4XGr8NoqQxR7SHzA+8ZOQ4lLB1dIiTo0b317M9TwU eK38LqNtlkCidS2ncVH6CKOomVWti61EjxKWPwyaqR0qaBUy8nb1U4j0iNiOJUTtdjFK Nogumxsx5vUwU+JbmP9AZP9PqeAddSsL/nGYJtdFTdgqVgf373Y4df/WcZUDuzIqZZwx zw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3g23s22tk1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 20 May 2022 10:30:00 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 3C61A10003A; Fri, 20 May 2022 10:29:58 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node2.st.com [10.75.129.70]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 3572A214D3E; Fri, 20 May 2022 10:29:58 +0200 (CEST) Received: from localhost (10.75.127.44) by SHFDAG1NODE2.st.com (10.75.129.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.20; Fri, 20 May 2022 10:29:57 +0200 From: Arnaud Pouliquen To: Bjorn Andersson , Mathieu Poirier CC: , , , Deepak Kumar Singh , Chris Lew , Subject: [RFC PATCH 03/10] rpmsg: core: Add rpmsg device remote flow control announcement ops Date: Fri, 20 May 2022 10:29:33 +0200 Message-ID: <20220520082940.2984914-4-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220520082940.2984914-1-arnaud.pouliquen@foss.st.com> References: <20220520082940.2984914-1-arnaud.pouliquen@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG2NODE2.st.com (10.75.127.5) To SHFDAG1NODE2.st.com (10.75.129.70) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-20_03,2022-05-19_03,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org This ops is called by the rpmsg flow control service to inform a rpmsg local device of a remote endpoint flow control state. Signed-off-by: Arnaud Pouliquen --- drivers/rpmsg/rpmsg_core.c | 24 ++++++++++++++++++++++++ drivers/rpmsg/rpmsg_internal.h | 7 +++++++ 2 files changed, 31 insertions(+) diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c index 8de8aadd9b27..6bbc3b3ace50 100644 --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -67,6 +67,30 @@ int rpmsg_release_channel(struct rpmsg_device *rpdev, } EXPORT_SYMBOL(rpmsg_release_channel); +/** + * rpmsg_channel_remote_fc() - announce remote endpoint flow control state + * using source and destination endpoint address info. + * @rpdev: rpmsg device + * @chinfo: channel_info + * @enable: state of the remote endpoint + * + * Return: 0 on success or an appropriate error value. + */ +int rpmsg_channel_remote_fc(struct rpmsg_device *rpdev, + struct rpmsg_channel_info *chinfo, + bool enable) +{ + if (WARN_ON(!rpdev)) + return -EINVAL; + if (!rpdev->ops || !rpdev->ops->announce_remote_fc) { + dev_err(&rpdev->dev, "no flow control ops found\n"); + return -ENXIO; + } + + return rpdev->ops->announce_remote_fc(rpdev, chinfo, enable); +} +EXPORT_SYMBOL(rpmsg_channel_remote_fc); + /** * rpmsg_create_ept() - create a new rpmsg_endpoint * @rpdev: rpmsg channel device diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h index 4ce58e68af30..44e2c0f2f5ea 100644 --- a/drivers/rpmsg/rpmsg_internal.h +++ b/drivers/rpmsg/rpmsg_internal.h @@ -43,6 +43,9 @@ struct rpmsg_device_ops { int (*announce_create)(struct rpmsg_device *ept); int (*announce_destroy)(struct rpmsg_device *ept); + int (*announce_remote_fc)(struct rpmsg_device *rpdev, + struct rpmsg_channel_info *chinfo, + bool enable); }; /** @@ -87,6 +90,10 @@ struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev, struct rpmsg_channel_info *chinfo); int rpmsg_release_channel(struct rpmsg_device *rpdev, struct rpmsg_channel_info *chinfo); + +int rpmsg_channel_remote_fc(struct rpmsg_device *rpdev, + struct rpmsg_channel_info *chinfo, + bool enable); /** * rpmsg_ctrldev_register_device() - register a char device for control based on rpdev * @rpdev: prepared rpdev to be used for creating endpoints