From patchwork Tue Dec 22 10:57:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 11986369 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_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 B0AA6C433E0 for ; Tue, 22 Dec 2020 10:59:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 840F423103 for ; Tue, 22 Dec 2020 10:59:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726614AbgLVK6w (ORCPT ); Tue, 22 Dec 2020 05:58:52 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:7620 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726472AbgLVK6w (ORCPT ); Tue, 22 Dec 2020 05:58:52 -0500 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0BMAw6QE012870; Tue, 22 Dec 2020 11:58:06 +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=a5kQ5Np6UsVy5bkTQ0gOe+8K4aMl8RM3spGtSWwiTos=; b=7fL6zE5oFRT2KXN95V1A9Ypt0f+6TUAY4TuR9H0lwFJq5CtohzWa3n/46Eg2UUX+R2c/ WC35wmhsmNciMvZgF6/vnRLKYiJ2uFXsHVSpCMh03Le7pOSmRDWXXTJkcOyokqM1Tx26 AVs/kuMvl6wzfmaN3OEqivlSt5ppuKU+SNoC0UX+VeDCfMTd8+3w3yvgUIAtzlQ0Q3o+ b7BVbykRnaM1I4VxpUlU6/5mQAaRcAIhqDHVxAYZS+BduOcw+rFv1098GktYHAj5WfjN /HetKXbUUYxp95NhrGp5NxaxixpeYTvZ1LdxAGDeeTKdJsMHSxuhOr55fPZ+61cHp06F zw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 35k0eb3xbc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 22 Dec 2020 11:58:06 +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 8C8B5100034; Tue, 22 Dec 2020 11:58:00 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 7D39E231603; Tue, 22 Dec 2020 11:58:00 +0100 (CET) Received: from localhost (10.75.127.50) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 22 Dec 2020 11:57:59 +0100 From: Arnaud Pouliquen To: Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , Andy Gross CC: , , , , Subject: [PATCH v2 02/16] rpmsg: add RPMsg control API to register service Date: Tue, 22 Dec 2020 11:57:12 +0100 Message-ID: <20201222105726.16906-3-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201222105726.16906-1-arnaud.pouliquen@foss.st.com> References: <20201222105726.16906-1-arnaud.pouliquen@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.50] X-ClientProxiedBy: SFHDAG1NODE2.st.com (10.75.127.2) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2020-12-22_04:2020-12-21,2020-12-22 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Add API to register a RPMsg service to the control device. The rpmsg_drv_ctrl_info structure links a service to its driver. Signed-off-by: Arnaud Pouliquen --- drivers/rpmsg/rpmsg_ctrl.c | 57 ++++++++++++++++++++++++++++++++++++++ include/linux/rpmsg.h | 31 +++++++++++++++++++++ include/uapi/linux/rpmsg.h | 14 ++++++++++ 3 files changed, 102 insertions(+) diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c index 425c3e32ada4..065e2e304019 100644 --- a/drivers/rpmsg/rpmsg_ctrl.c +++ b/drivers/rpmsg/rpmsg_ctrl.c @@ -27,6 +27,20 @@ struct rpmsg_ctrl_dev { struct device dev; }; +/** + * struct rpmsg_ctl_info - control info list node + * @ctrl: control driver info + * @node: list node + * + * This structure is used by rpmsg_ctl to list the registered drivers services + */ +struct rpmsg_ctl_info { + const struct rpmsg_drv_ctrl_info *ctrl; + struct list_head node; +}; + +static LIST_HEAD(rpmsg_drv_list); + static DEFINE_IDA(rpmsg_ctrl_ida); static DEFINE_IDA(rpmsg_minor_ida); @@ -175,6 +189,49 @@ static struct rpmsg_driver rpmsg_ctrl_driver = { .remove = rpmsg_ctrl_remove, }; +/** + * rpmsg_ctrl_register_ctl() -register control for the associated service + * @ctrl: rpmsg driver information + * + * This function is called by the rpmsg driver to register a service that will + * be exposed to be instantiate by the application. + */ +int rpmsg_ctrl_register_ctl(const struct rpmsg_drv_ctrl_info *ctrl) +{ + struct rpmsg_ctl_info *drv_info; + + drv_info = kzalloc(sizeof(*drv_info), GFP_KERNEL); + if (!drv_info) + return -ENOMEM; + + drv_info->ctrl = ctrl; + + list_add_tail(&drv_info->node, &rpmsg_drv_list); + + return 0; +} +EXPORT_SYMBOL(rpmsg_ctrl_register_ctl); + +/** + * rpmsg_ctrl_unregister_ctl() -unregister control for the associated service + * @ctrl: the rpmsg control information + * + * This function is called by the rpmsg driver to unregister the associated + * service. + */ +void rpmsg_ctrl_unregister_ctl(const struct rpmsg_drv_ctrl_info *ctrl) +{ + struct rpmsg_ctl_info *drv_info, *tmp; + + list_for_each_entry_safe(drv_info, tmp, &rpmsg_drv_list, node) { + if (drv_info->ctrl == ctrl) { + list_del(&drv_info->node); + kfree(drv_info); + } + } +} +EXPORT_SYMBOL(rpmsg_ctrl_unregister_ctl); + static int rpmsg_ctrl_init(void) { int ret; diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h index a5db828b2420..5d64704c2346 100644 --- a/include/linux/rpmsg.h +++ b/include/linux/rpmsg.h @@ -26,6 +26,19 @@ struct rpmsg_endpoint; struct rpmsg_device_ops; struct rpmsg_endpoint_ops; +/** + * struct rpmsg_drv_ctrl_info - rpmsg ctrl structure + * @drv_name: name of the associated driver + * @service: the associated rpmsg service listed in @rpmsg_services + * + * This structure is used by rpmsg_ctl to link the endpoint creation to the + * service rpmsg driver. + */ +struct rpmsg_drv_ctrl_info { + const char *drv_name; + u32 service; +}; + /** * struct rpmsg_channel_info - channel info representation * @name: name of service @@ -315,4 +328,22 @@ static inline __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, module_driver(__rpmsg_driver, register_rpmsg_driver, \ unregister_rpmsg_driver) +#if IS_ENABLED(CONFIG_RPMSG_CTRL) + +int rpmsg_ctrl_register_ctl(const struct rpmsg_drv_ctrl_info *ctrl); +void rpmsg_ctrl_unregister_ctl(const struct rpmsg_drv_ctrl_info *ctrl); + +#else + +static inline int rpmsg_ctrl_register_ctl(const struct rpmsg_drv_ctrl_info *ctrl) +{ + return 0; +} + +static inline void rpmsg_ctrl_unregister_ctl(const struct rpmsg_drv_ctrl_info *ctrl) +{ +} + +#endif /* IS_ENABLED(CONFIG_RPMSG_CTRL) */ + #endif /* _LINUX_RPMSG_H */ diff --git a/include/uapi/linux/rpmsg.h b/include/uapi/linux/rpmsg.h index e14c6dab4223..0b0cb028e0b3 100644 --- a/include/uapi/linux/rpmsg.h +++ b/include/uapi/linux/rpmsg.h @@ -9,6 +9,20 @@ #include #include +/** + * enum rpmsg_services - list of supported RPMsg services + * + * @RPMSG_RAW_SERVICE: char device RPMSG service + * @RPMSG_START_PRIVATE_SERVICES: private services have to be declared after. + */ +enum rpmsg_services { + /* Reserved services */ + RPMSG_RAW_SERVICE = 0, + + /* Private services */ + RPMSG_START_PRIVATE_SERVICES = 1024, +}; + /** * struct rpmsg_endpoint_info - endpoint info representation * @name: name of service