From patchwork Fri Feb 19 11:14:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 385345 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING, 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 43C32C433E9 for ; Fri, 19 Feb 2021 11:19:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8BB3C64EC7 for ; Fri, 19 Feb 2021 11:19:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230321AbhBSLTL (ORCPT ); Fri, 19 Feb 2021 06:19:11 -0500 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:58869 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230239AbhBSLSt (ORCPT ); Fri, 19 Feb 2021 06:18:49 -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 11JBCOi5009228; Fri, 19 Feb 2021 12:17:59 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=selector1; bh=aNSiq1WuZ5PT7Y3v8+mQF2IY08hpA6ycnBtHBmLuxKI=; b=VDjFFxmOTtTMt5hIWGnNdA6OM5xDDe+ivSbjqjy2D88iaBhJc65JNI7gSZ1ztgYQUxws cUDe6JeRF+Ep7YgaeRbDRBqcdhSAXJGC7eZjcaPWy4FAkUCqOm+YEO/n8ci7Layw8UnI IaTqw51Fm9AbcHasZzgsURnZteIeTOqzG14OZJ0SHGwpQ0lilzgTu4WR4VWesoQly595 H9UYH6bDmwg5v6CoSAuCBsHPm2misoy86xfwMbx8h6+7Mpq95JIDu9VdZdpLEmDo6cJ2 h9pzt5BQlDfGbev77iaWkFtcPToixBARNQxGOZKhi2+gdc+F+eGei4LkHJGig3Rhfam6 FA== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 36sqadeymx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 19 Feb 2021 12:17:59 +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 D282110002A; Fri, 19 Feb 2021 12:17:58 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id BEDA82266D7; Fri, 19 Feb 2021 12:17:58 +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; Fri, 19 Feb 2021 12:17:58 +0100 From: Arnaud Pouliquen To: Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , Andy Gross CC: , , , , Subject: [PATCH v5 00/16] introduce a generic IOCTL interface for RPMsg channels management Date: Fri, 19 Feb 2021 12:14:45 +0100 Message-ID: <20210219111501.14261-1-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG3NODE1.st.com (10.75.127.7) 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=2021-02-19_04:2021-02-18,2021-02-19 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This series restructures the RPMsg char driver to decorrelate the control part and to create a generic RPMsg ioctl interface compatible with other RPMsg services. The V4 and V5 fix compilation issues reported by the kernel test robot and analyzed by Dan Carpenter . The V3 is based on the guideline proposed by Mathieu Poirier to keep as much as possible the legacy implementation of the rpmsg_char used by the GLINK and SMD platforms. Objectives of the series: - Allow to create a service from Linux user application: - with a specific name - with or without name service announcement. - Allow to probe the same service by receiving either a NS announcement from the remote firmware or a Linux user application request. - Use these services independently of the RPMsg transport implementation (e.g be able to use RPMSg char with the RPMsg virtio bus). Steps in the series: - Extract the control part of the char dev and create the rpmsg_ctrl.c file (patches 1 to 6) - Enable the use of the chardev with the virtio backend (patches 7 to 11) - Introduce the RPMSG_CREATE_DEV_IOCTL IOCTL to instantiate RPMsg devices (patch 12) The application can then create or release a channel by specifying: - the name service of the device to instantiate. - the source address. - the destination address. - Instantiate the /dev/rpmsg interface on remote NS announcement (patches 13 to 16) In this revision, I do not divide the series into several parts in order to show a complete picture of the proposed evolution. To simplify the review, if requested, I can send it in several steps listed above. Known current Limitations: - Tested only with virtio RPMsg bus. The glink and smd drivers adaptations have not been tested (not able to test it). - For the virtio backend: No NS announcement is sent to the remote processor if the source address is set to RPMSG_ADDR_ANY. - For the virtio backend: the existing RPMSG_CREATE_EPT_IOCTL is working but the endpoints are not attached to an exiting channel. - to limit patches the pending RPMSG_DESTROY_DEV_IOCTL has not ben implemented. This will be proposed in a second step. This series can be applied on git/andersson/remoteproc.git for-next branch (d9ff3a5789cb). This series can be tested using rpmsgexport, rpmsgcreatedev and ping tools available here: https://github.com/arnopo/rpmsgexport.git Reference to the V4 discussion thread: https://lkml.org/lkml/2021/2/17/384 Arnaud Pouliquen (16): rpmsg: char: rename rpmsg_char_init to rpmsg_chrdev_init rpmsg: move RPMSG_ADDR_ANY in user API rpmsg: add short description of the IOCTL defined in UAPI. rpmsg: char: export eptdev create an destroy functions rpmsg: char: dissociate the control device from the rpmsg class rpmsg: move the rpmsg control device from rpmsg_char to rpmsg_ctrl rpmsg: update rpmsg_chrdev_register_device function rpmsg: glink: add sendto and trysendto ops rpmsg: smd: add sendto and trysendto ops rpmsg: char: use sendto to specify the message destination address rpmsg: virtio: register the rpmsg_ctrl device rpmsg: ctrl: introduce RPMSG_CREATE_DEV_IOCTL rpmsg: char: introduce __rpmsg_chrdev_create_eptdev function rpmsg: char: introduce a RPMsg driver for the RPMsg char device rpmsg: char: no dynamic endpoint management for the default one rpmsg: char: return an error if device already open drivers/rpmsg/Kconfig | 9 ++ drivers/rpmsg/Makefile | 1 + drivers/rpmsg/qcom_glink_native.c | 18 ++- drivers/rpmsg/qcom_smd.c | 18 ++- drivers/rpmsg/rpmsg_char.c | 237 +++++++++++------------------- drivers/rpmsg/rpmsg_char.h | 51 +++++++ drivers/rpmsg/rpmsg_ctrl.c | 229 +++++++++++++++++++++++++++++ drivers/rpmsg/rpmsg_internal.h | 10 +- drivers/rpmsg/virtio_rpmsg_bus.c | 57 ++++++- include/linux/rpmsg.h | 3 +- include/uapi/linux/rpmsg.h | 18 ++- 11 files changed, 485 insertions(+), 166 deletions(-) create mode 100644 drivers/rpmsg/rpmsg_char.h create mode 100644 drivers/rpmsg/rpmsg_ctrl.c