Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Arnaud Pouliquen | 483 | 98.57% | 1 | 33.33% |
Krzysztof Kozlowski | 7 | 1.43% | 2 | 66.67% |
Total | 490 | 3 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) STMicroelectronics 2020 - All Rights Reserved */ #include <linux/device.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/rpmsg.h> #include <linux/rpmsg/ns.h> #include <linux/slab.h> #include "rpmsg_internal.h" /** * rpmsg_ns_register_device() - register name service device based on rpdev * @rpdev: prepared rpdev to be used for creating endpoints * * This function wraps rpmsg_register_device() preparing the rpdev for use as * basis for the rpmsg name service device. */ int rpmsg_ns_register_device(struct rpmsg_device *rpdev) { rpdev->src = RPMSG_NS_ADDR; rpdev->dst = RPMSG_NS_ADDR; return rpmsg_register_device_override(rpdev, "rpmsg_ns"); } EXPORT_SYMBOL(rpmsg_ns_register_device); /* invoked when a name service announcement arrives */ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, void *priv, u32 src) { struct rpmsg_ns_msg *msg = data; struct rpmsg_device *newch; struct rpmsg_channel_info chinfo; struct device *dev = rpdev->dev.parent; int ret; #if defined(CONFIG_DYNAMIC_DEBUG) dynamic_hex_dump("NS announcement: ", DUMP_PREFIX_NONE, 16, 1, data, len, true); #endif if (len != sizeof(*msg)) { dev_err(dev, "malformed ns msg (%d)\n", len); return -EINVAL; } /* don't trust the remote processor for null terminating the name */ msg->name[RPMSG_NAME_SIZE - 1] = '\0'; strncpy(chinfo.name, msg->name, sizeof(chinfo.name)); chinfo.src = RPMSG_ADDR_ANY; chinfo.dst = rpmsg32_to_cpu(rpdev, msg->addr); dev_info(dev, "%sing channel %s addr 0x%x\n", rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY ? "destroy" : "creat", msg->name, chinfo.dst); if (rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY) { ret = rpmsg_release_channel(rpdev, &chinfo); if (ret) dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret); } else { newch = rpmsg_create_channel(rpdev, &chinfo); if (!newch) dev_err(dev, "rpmsg_create_channel failed\n"); } return 0; } static int rpmsg_ns_probe(struct rpmsg_device *rpdev) { struct rpmsg_endpoint *ns_ept; struct rpmsg_channel_info ns_chinfo = { .src = RPMSG_NS_ADDR, .dst = RPMSG_NS_ADDR, .name = "name_service", }; /* * Create the NS announcement service endpoint associated to the RPMsg * device. The endpoint will be automatically destroyed when the RPMsg * device will be deleted. */ ns_ept = rpmsg_create_ept(rpdev, rpmsg_ns_cb, NULL, ns_chinfo); if (!ns_ept) { dev_err(&rpdev->dev, "failed to create the ns ept\n"); return -ENOMEM; } rpdev->ept = ns_ept; return 0; } static struct rpmsg_driver rpmsg_ns_driver = { .drv.name = KBUILD_MODNAME, .probe = rpmsg_ns_probe, }; static int rpmsg_ns_init(void) { int ret; ret = register_rpmsg_driver(&rpmsg_ns_driver); if (ret < 0) pr_err("%s: Failed to register rpmsg driver\n", __func__); return ret; } postcore_initcall(rpmsg_ns_init); static void rpmsg_ns_exit(void) { unregister_rpmsg_driver(&rpmsg_ns_driver); } module_exit(rpmsg_ns_exit); MODULE_DESCRIPTION("Name service announcement rpmsg driver"); MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen@st.com>"); MODULE_ALIAS("rpmsg:" KBUILD_MODNAME); MODULE_LICENSE("GPL v2");
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