drivers/rpmsg/rpmsg_ns.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) STMicroelectronics 2020 - All Rights Reserved
8 #include <linux/rpmsg.h>
9 #include <linux/rpmsg/ns.h>
15  * rpmsg_ns_register_device() - register name service device based on rpdev
19  * basis for the rpmsg name service device.
23 	rpdev->src = RPMSG_NS_ADDR;  in rpmsg_ns_register_device()
24 	rpdev->dst = RPMSG_NS_ADDR;  in rpmsg_ns_register_device()
30 /* invoked when a name service announcement arrives */
37 	struct device *dev = rpdev->dev.parent;  in rpmsg_ns_cb()
47 		return -EINVAL;  in rpmsg_ns_cb()
50 	/* don't trust the remote processor for null terminating the name */  in rpmsg_ns_cb()
51 	msg->name[RPMSG_NAME_SIZE - 1] = '\0';  in rpmsg_ns_cb()
53 	strscpy_pad(chinfo.name, msg->name, sizeof(chinfo.name));  in rpmsg_ns_cb()
55 	chinfo.dst = rpmsg32_to_cpu(rpdev, msg->addr);  in rpmsg_ns_cb()
57 	dev_info(dev, "%sing channel %s addr 0x%x\n",  in rpmsg_ns_cb()
58 		 rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY ?  in rpmsg_ns_cb()
59 		 "destroy" : "creat", msg->name, chinfo.dst);  in rpmsg_ns_cb()
61 	if (rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY) {  in rpmsg_ns_cb()
80 		.name = "name_service",  in rpmsg_ns_probe()
84 	 * Create the NS announcement service endpoint associated to the RPMsg  in rpmsg_ns_probe()
85 	 * device. The endpoint will be automatically destroyed when the RPMsg  in rpmsg_ns_probe()
90 		dev_err(&rpdev->dev, "failed to create the ns ept\n");  in rpmsg_ns_probe()
91 		return -ENOMEM;  in rpmsg_ns_probe()
93 	rpdev->ept = ns_ept;  in rpmsg_ns_probe()
99 	.drv.name = KBUILD_MODNAME,
109 		pr_err("%s: Failed to register rpmsg driver\n", __func__);  in rpmsg_ns_init()
121 MODULE_DESCRIPTION("Name service announcement rpmsg driver");
123 MODULE_ALIAS("rpmsg:" KBUILD_MODNAME);