/* * Copyright (c) 2014, Mentor Graphics Corporation * Copyright (c) 2015 Xilinx, Inc. * Copyright (c) 2016 Freescale Semiconductor, Inc. * Copyright 2016-2019 NXP * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of the copyright holder nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include "rpmsg_lite.h" #include "rpmsg_ns.h" #include #define RL_NS_NAME_SIZE (32) /*! * struct rpmsg_ns_msg - dynamic name service announcement message * @name: name of remote service that is published * @addr: address of remote service that is published * @flags: indicates whether service is created or destroyed * * This message is sent across to publish a new service, or announce * about its removal. When we receive these messages, an appropriate * rpmsg channel (i.e device) is created/destroyed. In turn, the ->probe() * or ->remove() handler of the appropriate rpmsg driver will be invoked * (if/as-soon-as one is registered). */ RL_PACKED_BEGIN struct rpmsg_ns_msg { char name[RL_NS_NAME_SIZE]; uint32_t addr; uint32_t flags; } RL_PACKED_END; /*! * @brief * Nameservice callback, called in interrupt context * * @param payload Pointer to the buffer containing received data * @param payload_len Size of data received, in bytes * @param src Pointer to address of the endpoint from which data is received * @param priv Private data provided during endpoint creation * * @return RL_RELEASE, message is always freed * */ static int32_t rpmsg_ns_rx_cb(void *payload, uint32_t payload_len, uint32_t src, void *priv) { struct rpmsg_ns_msg *ns_msg_ptr = payload; struct rpmsg_ns_callback_data *cb_ctxt = priv; RL_ASSERT(priv != RL_NULL); RL_ASSERT(cb_ctxt->cb != RL_NULL); /* Drop likely bad messages received at nameservice address */ if (payload_len == sizeof(struct rpmsg_ns_msg)) { cb_ctxt->cb(ns_msg_ptr->addr, ns_msg_ptr->name, ns_msg_ptr->flags, cb_ctxt->user_data); } return RL_RELEASE; } #if defined(RL_USE_STATIC_API) && (RL_USE_STATIC_API == 1) rpmsg_ns_handle rpmsg_ns_bind(struct rpmsg_lite_instance *rpmsg_lite_dev, rpmsg_ns_new_ept_cb app_cb, void *user_data, rpmsg_ns_static_context *ns_ept_ctxt) #else rpmsg_ns_handle rpmsg_ns_bind(struct rpmsg_lite_instance *rpmsg_lite_dev, rpmsg_ns_new_ept_cb app_cb, void *user_data) #endif /* RL_USE_STATIC_API */ { struct rpmsg_ns_context *ns_ctxt; if (app_cb == RL_NULL) { return RL_NULL; } #if defined(RL_USE_STATIC_API) && (RL_USE_STATIC_API == 1) if (ns_ept_ctxt == RL_NULL) { return RL_NULL; } ns_ctxt = &ns_ept_ctxt->ns_ctxt; /* Set-up the nameservice callback context */ ns_ept_ctxt->cb_ctxt.user_data = user_data; ns_ept_ctxt->cb_ctxt.cb = app_cb; ns_ctxt->cb_ctxt = &ns_ept_ctxt->cb_ctxt; ns_ctxt->ept = rpmsg_lite_create_ept(rpmsg_lite_dev, RL_NS_EPT_ADDR, rpmsg_ns_rx_cb, (void *)ns_ctxt->cb_ctxt, &ns_ept_ctxt->ept_ctxt); #else { struct rpmsg_ns_callback_data *cb_ctxt; cb_ctxt = env_allocate_memory(sizeof(struct rpmsg_ns_callback_data)); if (cb_ctxt == RL_NULL) { return RL_NULL; } ns_ctxt = env_allocate_memory(sizeof(struct rpmsg_ns_context)); if (ns_ctxt == RL_NULL) { env_free_memory(cb_ctxt); return RL_NULL; } /* Set-up the nameservice callback context */ cb_ctxt->user_data = user_data; cb_ctxt->cb = app_cb; ns_ctxt->cb_ctxt = cb_ctxt; ns_ctxt->ept = rpmsg_lite_create_ept(rpmsg_lite_dev, RL_NS_EPT_ADDR, rpmsg_ns_rx_cb, (void *)ns_ctxt->cb_ctxt); } #endif /* RL_USE_STATIC_API */ return (rpmsg_ns_handle)ns_ctxt; } int32_t rpmsg_ns_unbind(struct rpmsg_lite_instance *rpmsg_lite_dev, rpmsg_ns_handle handle) { struct rpmsg_ns_context *ns_ctxt = (struct rpmsg_ns_context *)handle; #if defined(RL_USE_STATIC_API) && (RL_USE_STATIC_API == 1) return rpmsg_lite_destroy_ept(rpmsg_lite_dev, ns_ctxt->ept); #else { int32_t retval; retval = rpmsg_lite_destroy_ept(rpmsg_lite_dev, ns_ctxt->ept); env_free_memory(ns_ctxt->cb_ctxt); env_free_memory(ns_ctxt); return retval; } #endif } int32_t rpmsg_ns_announce(struct rpmsg_lite_instance *rpmsg_lite_dev, struct rpmsg_lite_endpoint *new_ept, const char *ept_name, uint32_t flags) { struct rpmsg_ns_msg ns_msg; if (ept_name == RL_NULL) { return RL_ERR_PARAM; } if (new_ept == RL_NULL) { return RL_ERR_PARAM; } env_strncpy(ns_msg.name, ept_name, RL_NS_NAME_SIZE); ns_msg.flags = flags; ns_msg.addr = new_ept->addr; return rpmsg_lite_send(rpmsg_lite_dev, new_ept, RL_NS_EPT_ADDR, (char *)&ns_msg, sizeof(struct rpmsg_ns_msg), RL_BLOCK); }