From patchwork Wed Feb 17 13:28:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud Pouliquen X-Patchwork-Id: 12091615 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 6AF2EC433E0 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 23CC464E5F for ; Wed, 17 Feb 2021 13:33:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232717AbhBQNd2 (ORCPT ); Wed, 17 Feb 2021 08:33:28 -0500 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:39316 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233057AbhBQNbl (ORCPT ); Wed, 17 Feb 2021 08:31:41 -0500 Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 11HDQ5bt018515; Wed, 17 Feb 2021 14:30:52 +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=PALxylp6AUpTS7OZFEYPQXmfH/X+QyXLM1mRwWdH39Y=; b=aYcPeB4iIdvrOQtkbVKiyauTzTlEMhWI/m3+XY+KDkqjA/OCy5l/KPwdfvrpBqxyPxXN 4hkGmPVNaZWKN3GMpaVFTGCptAwcYzIvEuO61b0+msdFuQO6jGw2BFqdQB6gyghlVIIe t4V5k2fRfCTOH51QjFNQE4eGahB5qbzqXkHl0TsX7JCd2QzpdYfPty5bGTFIAh7+9tv0 9MH4GEchmXEDk8v8iKPummb0r1VWLvT0Y64MgGv5sKZwBm18NxWz4DiQNxsWoMKEMwdy HSBjEWoMIELtCpsbx9Q1cGCM+R1TXDioH5FTLo+egyivZL51kBJxrEhIbsc2AARxi6ze Uw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 36p706nnbu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 17 Feb 2021 14:30:52 +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 AB832100034; Wed, 17 Feb 2021 14:30:51 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 9CDF52370C9; Wed, 17 Feb 2021 14:30:51 +0100 (CET) Received: from localhost (10.75.127.46) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 17 Feb 2021 14:30:51 +0100 From: Arnaud Pouliquen To: Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , Andy Gross CC: , , , , Subject: [PATCH v4 06/16] rpmsg: move the rpmsg control device from rpmsg_char to rpmsg_ctrl Date: Wed, 17 Feb 2021 14:28:55 +0100 Message-ID: <20210217132905.1485-7-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: [10.75.127.46] 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=2021-02-17_11:2021-02-16,2021-02-17 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Move the code related to the rpmsg_ctrl char device to the new rpmsg_ctrl.c module. Manage the dependency in the kconfig. Signed-off-by: Arnaud Pouliquen --- drivers/rpmsg/Kconfig | 9 ++ drivers/rpmsg/Makefile | 1 + drivers/rpmsg/rpmsg_char.c | 163 ---------------------------- drivers/rpmsg/rpmsg_ctrl.c | 216 +++++++++++++++++++++++++++++++++++++ 4 files changed, 226 insertions(+), 163 deletions(-) create mode 100644 drivers/rpmsg/rpmsg_ctrl.c diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig index 0b4407abdf13..2d0cd7fdd710 100644 --- a/drivers/rpmsg/Kconfig +++ b/drivers/rpmsg/Kconfig @@ -10,11 +10,20 @@ config RPMSG_CHAR tristate "RPMSG device interface" depends on RPMSG depends on NET + select RPMSG_CTRL help Say Y here to export rpmsg endpoints as device files, usually found in /dev. They make it possible for user-space programs to send and receive rpmsg packets. +config RPMSG_CTRL + tristate "RPMSG control interface" + depends on RPMSG + help + Say Y here to enable the support of the /dev/rpmsg_ctlX API. This API + allows user-space programs to create endpoints with specific service name, + source and destination addresses. + config RPMSG_NS tristate "RPMSG name service announcement" depends on RPMSG diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile index 8d452656f0ee..58e3b382e316 100644 --- a/drivers/rpmsg/Makefile +++ b/drivers/rpmsg/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_RPMSG) += rpmsg_core.o obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o +obj-$(CONFIG_RPMSG_CTRL) += rpmsg_ctrl.o obj-$(CONFIG_RPMSG_NS) += rpmsg_ns.o obj-$(CONFIG_RPMSG_MTK_SCP) += mtk_rpmsg.o qcom_glink-objs := qcom_glink_native.o qcom_glink_ssr.o diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index 23e369a00531..83c10b39b139 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -31,28 +31,12 @@ static dev_t rpmsg_major; static struct class *rpmsg_class; -static DEFINE_IDA(rpmsg_ctrl_ida); static DEFINE_IDA(rpmsg_ept_ida); static DEFINE_IDA(rpmsg_minor_ida); #define dev_to_eptdev(dev) container_of(dev, struct rpmsg_eptdev, dev) #define cdev_to_eptdev(i_cdev) container_of(i_cdev, struct rpmsg_eptdev, cdev) -#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrldev, dev) -#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrldev, cdev) - -/** - * struct rpmsg_ctrldev - control device for instantiating endpoint devices - * @rpdev: underlaying rpmsg device - * @cdev: cdev for the ctrl device - * @dev: device for the ctrl device - */ -struct rpmsg_ctrldev { - struct rpmsg_device *rpdev; - struct cdev cdev; - struct device dev; -}; - /** * struct rpmsg_eptdev - endpoint device context * @dev: endpoint device @@ -411,145 +395,6 @@ int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent } EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev); -static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp) -{ - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); - - get_device(&ctrldev->dev); - filp->private_data = ctrldev; - - return 0; -} - -static int rpmsg_ctrldev_release(struct inode *inode, struct file *filp) -{ - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); - - put_device(&ctrldev->dev); - - return 0; -} - -static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd, - unsigned long arg) -{ - struct rpmsg_ctrldev *ctrldev = fp->private_data; - void __user *argp = (void __user *)arg; - struct rpmsg_endpoint_info eptinfo; - struct rpmsg_channel_info chinfo; - - if (cmd != RPMSG_CREATE_EPT_IOCTL) - return -EINVAL; - - if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) - return -EFAULT; - - memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); - chinfo.name[RPMSG_NAME_SIZE-1] = '\0'; - chinfo.src = eptinfo.src; - chinfo.dst = eptinfo.dst; - - return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); -}; - -static const struct file_operations rpmsg_ctrldev_fops = { - .owner = THIS_MODULE, - .open = rpmsg_ctrldev_open, - .release = rpmsg_ctrldev_release, - .unlocked_ioctl = rpmsg_ctrldev_ioctl, - .compat_ioctl = compat_ptr_ioctl, -}; - -static void rpmsg_ctrldev_release_device(struct device *dev) -{ - struct rpmsg_ctrldev *ctrldev = dev_to_ctrldev(dev); - - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); - cdev_del(&ctrldev->cdev); - kfree(ctrldev); -} - -static int rpmsg_chrdev_probe(struct rpmsg_device *rpdev) -{ - struct rpmsg_ctrldev *ctrldev; - struct device *dev; - int ret; - - ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); - if (!ctrldev) - return -ENOMEM; - - ctrldev->rpdev = rpdev; - - dev = &ctrldev->dev; - device_initialize(dev); - dev->parent = &rpdev->dev; - - cdev_init(&ctrldev->cdev, &rpmsg_ctrldev_fops); - ctrldev->cdev.owner = THIS_MODULE; - - ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); - if (ret < 0) - goto free_ctrldev; - dev->devt = MKDEV(MAJOR(rpmsg_major), ret); - - ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); - if (ret < 0) - goto free_minor_ida; - dev->id = ret; - dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); - - ret = cdev_add(&ctrldev->cdev, dev->devt, 1); - if (ret) - goto free_ctrl_ida; - - /* We can now rely on the release function for cleanup */ - dev->release = rpmsg_ctrldev_release_device; - - ret = device_add(dev); - if (ret) { - dev_err(&rpdev->dev, "device_add failed: %d\n", ret); - put_device(dev); - } - - dev_set_drvdata(&rpdev->dev, ctrldev); - - return ret; - -free_ctrl_ida: - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); -free_minor_ida: - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); -free_ctrldev: - put_device(dev); - kfree(ctrldev); - - return ret; -} - -static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev) -{ - struct rpmsg_ctrldev *ctrldev = dev_get_drvdata(&rpdev->dev); - int ret; - - /* Destroy all endpoints */ - ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_eptdev_destroy); - if (ret) - dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); - - device_del(&ctrldev->dev); - put_device(&ctrldev->dev); -} - -static struct rpmsg_driver rpmsg_chrdev_driver = { - .probe = rpmsg_chrdev_probe, - .remove = rpmsg_chrdev_remove, - .drv = { - .name = "rpmsg_chrdev", - }, -}; - static int rpmsg_chrdev_init(void) { int ret; @@ -567,20 +412,12 @@ static int rpmsg_chrdev_init(void) return PTR_ERR(rpmsg_class); } - ret = register_rpmsg_driver(&rpmsg_chrdev_driver); - if (ret < 0) { - pr_err("rpmsgchr: failed to register rpmsg driver\n"); - class_destroy(rpmsg_class); - unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); - } - return ret; } postcore_initcall(rpmsg_chrdev_init); static void rpmsg_chrdev_exit(void) { - unregister_rpmsg_driver(&rpmsg_chrdev_driver); class_destroy(rpmsg_class); unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); } diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c new file mode 100644 index 000000000000..fa05b67d24da --- /dev/null +++ b/drivers/rpmsg/rpmsg_ctrl.c @@ -0,0 +1,216 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021, STMicroelectronics + * Copyright (c) 2016, Linaro Ltd. + * Copyright (c) 2012, Michal Simek + * Copyright (c) 2012, PetaLogix + * Copyright (c) 2011, Texas Instruments, Inc. + * Copyright (c) 2011, Google, Inc. + * + * Based on rpmsg performance statistics driver by Michal Simek, which in turn + * was based on TI & Google OMX rpmsg driver. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "rpmsg_char.h" +#include "rpmsg_internal.h" + +#define RPMSG_DEV_MAX (MINORMASK + 1) + +static dev_t rpmsg_major; + +static DEFINE_IDA(rpmsg_ctrl_ida); +static DEFINE_IDA(rpmsg_minor_ida); + +#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrl, dev) +#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrl, cdev) + +/** + * struct rpmsg_ctrl - control device for instantiating endpoint devices + * @rpdev: underlaying rpmsg device + * @cdev: cdev for the ctrl device + * @dev: device for the ctrl device + */ +struct rpmsg_ctrl { + struct rpmsg_device *rpdev; + struct cdev cdev; + struct device dev; +}; + +static int rpmsg_ctrl_open(struct inode *inode, struct file *filp) +{ + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); + + get_device(&ctrldev->dev); + filp->private_data = ctrldev; + + return 0; +} + +static int rpmsg_ctrl_release(struct inode *inode, struct file *filp) +{ + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); + + put_device(&ctrldev->dev); + + return 0; +} + +static long rpmsg_ctrl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) +{ + struct rpmsg_ctrl *ctrldev = fp->private_data; + void __user *argp = (void __user *)arg; + struct rpmsg_endpoint_info eptinfo; + struct rpmsg_channel_info chinfo; + + if (cmd != RPMSG_CREATE_EPT_IOCTL) + return -EINVAL; + + if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) + return -EFAULT; + + memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); + chinfo.name[RPMSG_NAME_SIZE - 1] = '\0'; + chinfo.src = eptinfo.src; + chinfo.dst = eptinfo.dst; + + return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); +}; + +static const struct file_operations rpmsg_ctrl_fops = { + .owner = THIS_MODULE, + .open = rpmsg_ctrl_open, + .release = rpmsg_ctrl_release, + .unlocked_ioctl = rpmsg_ctrl_ioctl, + .compat_ioctl = compat_ptr_ioctl, +}; + +static void rpmsg_ctrl_release_device(struct device *dev) +{ + struct rpmsg_ctrl *ctrldev = dev_to_ctrldev(dev); + + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); + cdev_del(&ctrldev->cdev); + kfree(ctrldev); +} + +static int rpmsg_ctrl_probe(struct rpmsg_device *rpdev) +{ + struct rpmsg_ctrl *ctrldev; + struct device *dev; + int ret; + + ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); + if (!ctrldev) + return -ENOMEM; + + ctrldev->rpdev = rpdev; + + dev = &ctrldev->dev; + device_initialize(dev); + dev->parent = &rpdev->dev; + + cdev_init(&ctrldev->cdev, &rpmsg_ctrl_fops); + ctrldev->cdev.owner = THIS_MODULE; + + ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); + if (ret < 0) + goto free_ctrldev; + dev->devt = MKDEV(MAJOR(rpmsg_major), ret); + + ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); + if (ret < 0) + goto free_minor_ida; + dev->id = ret; + dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); + + ret = cdev_add(&ctrldev->cdev, dev->devt, 1); + if (ret) + goto free_ctrl_ida; + + /* We can now rely on the release function for cleanup */ + dev->release = rpmsg_ctrl_release_device; + + ret = device_add(dev); + if (ret) { + dev_err(&rpdev->dev, "device_add failed: %d\n", ret); + put_device(dev); + } + + dev_set_drvdata(&rpdev->dev, ctrldev); + + return ret; + +free_ctrl_ida: + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); +free_minor_ida: + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); +free_ctrldev: + put_device(dev); + kfree(ctrldev); + + return ret; +} + +static void rpmsg_ctrl_remove(struct rpmsg_device *rpdev) +{ + struct rpmsg_ctrl *ctrldev = dev_get_drvdata(&rpdev->dev); + int ret; + + /* Destroy all endpoints */ + ret = device_for_each_child(&ctrldev->dev, NULL, + rpmsg_chrdev_eptdev_destroy); + if (ret) + dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); + + device_del(&ctrldev->dev); + put_device(&ctrldev->dev); +} + +static struct rpmsg_driver rpmsg_ctrl_driver = { + .probe = rpmsg_ctrl_probe, + .remove = rpmsg_ctrl_remove, + .drv = { + .name = "rpmsg_chrdev", + }, +}; + +static int rpmsg_ctrl_init(void) +{ + int ret; + + ret = alloc_chrdev_region(&rpmsg_major, 0, RPMSG_DEV_MAX, "rpmsg"); + if (ret < 0) { + pr_err("rpmsg: failed to allocate char dev region\n"); + return ret; + } + + ret = register_rpmsg_driver(&rpmsg_ctrl_driver); + if (ret < 0) { + pr_err("rpmsg ctrl: failed to register rpmsg driver\n"); + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); + } + + return ret; +} +postcore_initcall(rpmsg_ctrl_init); + +static void rpmsg_ctrl_exit(void) +{ + unregister_rpmsg_driver(&rpmsg_ctrl_driver); + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); +} +module_exit(rpmsg_ctrl_exit); + +MODULE_DESCRIPTION("rpmsg control interface"); +MODULE_ALIAS("rpmsg:" KBUILD_MODNAME); +MODULE_LICENSE("GPL v2");