From patchwork Wed Feb 17 13:29:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud Pouliquen X-Patchwork-Id: 12091619 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D50F9C43381 for ; Wed, 17 Feb 2021 13:33:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A896D64E68 for ; Wed, 17 Feb 2021 13:33:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233073AbhBQNdn (ORCPT ); Wed, 17 Feb 2021 08:33:43 -0500 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:30436 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233088AbhBQNcl (ORCPT ); Wed, 17 Feb 2021 08:32:41 -0500 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 11HDS2AR026029; Wed, 17 Feb 2021 14:31:56 +0100 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-type; s=selector1; bh=5/5ztwEi6vNBYmfGVztdGKdMNwulPVy/4Aq1/ukOfu0=; b=PAFaE01CCLIglFdIgKiP0C1jbK1Kg2Wr5bxsgfqqyaE/RroOU4littqGNlFK0yAtLMNl CJBsOrk1he2ZZpqqszx6Tnbc9s0mSs7NZ6xmDF08ztLzVEQ7fkbuNhLFEREK66vkb7g9 ul4ID1S23zx4Bo1cRBQIh50rsUBrr1VGz2sQsCCeuPSohfJgV+A9c7feGOZODmA+OtX1 z3332Blqd5dpZMXV8ZPQLyXR3t9b5ie5Z0L+TxOSFZka8XaEQxoDFnZQyiZW2xeGamjx qr6Q73pBkv0KOmv1jFSIJcakCLq7J9ZNK3KZ0lH69ePqqUsR0ZH/8//mJhqB9O/nKP6x Jw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 36p547p3w8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 17 Feb 2021 14:31:56 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 14CA0100038; Wed, 17 Feb 2021 14:31:56 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 0683F2370CE; Wed, 17 Feb 2021 14:31:56 +0100 (CET) Received: from localhost (10.75.127.44) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 17 Feb 2021 14:31:55 +0100 From: Arnaud Pouliquen To: Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , Andy Gross CC: , , , , Subject: [PATCH v4 12/16] rpmsg: ctrl: introduce RPMSG_CREATE_DEV_IOCTL Date: Wed, 17 Feb 2021 14:29:01 +0100 Message-ID: <20210217132905.1485-13-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210217132905.1485-1-arnaud.pouliquen@foss.st.com> References: <20210217132905.1485-1-arnaud.pouliquen@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG3NODE3.st.com (10.75.127.9) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.761 definitions=2021-02-17_11:2021-02-16,2021-02-17 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Implement the RPMSG_CREATE_DEV_IOCTL to allow the user application to initiate a communication through a new RPMsg channel. This Ioctl can be used to instantiate a local RPMsg device. Depending on the back-end implementation, a NS announcement can be sent to the remote processor. Suggested-by: Mathieu Poirier Signed-off-by: Arnaud Pouliquen --- drivers/rpmsg/rpmsg_ctrl.c | 21 +++++++++++++++++---- include/uapi/linux/rpmsg.h | 5 +++++ 2 files changed, 22 insertions(+), 4 deletions(-) diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c index 2e43b4096aa8..78c13816bfc6 100644 --- a/drivers/rpmsg/rpmsg_ctrl.c +++ b/drivers/rpmsg/rpmsg_ctrl.c @@ -70,9 +70,7 @@ static long rpmsg_ctrl_ioctl(struct file *fp, unsigned int cmd, unsigned long ar void __user *argp = (void __user *)arg; struct rpmsg_endpoint_info eptinfo; struct rpmsg_channel_info chinfo; - - if (cmd != RPMSG_CREATE_EPT_IOCTL) - return -EINVAL; + struct rpmsg_device *newch; if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) return -EFAULT; @@ -82,7 +80,22 @@ static long rpmsg_ctrl_ioctl(struct file *fp, unsigned int cmd, unsigned long ar chinfo.src = eptinfo.src; chinfo.dst = eptinfo.dst; - return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); + switch (cmd) { + case RPMSG_CREATE_EPT_IOCTL: + return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); + + case RPMSG_CREATE_DEV_IOCTL: + newch = rpmsg_create_channel(ctrldev->rpdev, &chinfo); + if (!newch) { + dev_err(&ctrldev->dev, "rpmsg_create_channel failed\n"); + return -ENXIO; + } + return 0; + + default: + return -EINVAL; + } + }; static const struct file_operations rpmsg_ctrl_fops = { diff --git a/include/uapi/linux/rpmsg.h b/include/uapi/linux/rpmsg.h index f5ca8740f3fb..f9d5a74e7801 100644 --- a/include/uapi/linux/rpmsg.h +++ b/include/uapi/linux/rpmsg.h @@ -33,4 +33,9 @@ struct rpmsg_endpoint_info { */ #define RPMSG_DESTROY_EPT_IOCTL _IO(0xb5, 0x2) +/** + * Instantiate a rpmsg service device. + */ +#define RPMSG_CREATE_DEV_IOCTL _IOW(0xb5, 0x3, struct rpmsg_endpoint_info) + #endif