/* * Copyright (c) 2023 Jiri Svoboda * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - 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. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /** @addtogroup libddev * @{ */ /** * @file * @brief Display protocol server stub */ #include <ddev_srv.h> #include <errno.h> #include <io/log.h> #include <ipc/ddev.h> #include <mem.h> #include <stdlib.h> #include <stddef.h> /** Connect to a GC. * * XXX As a workaround here we tell the client the values of arg2 and arg3 * needed to connect to the GC using async_connect_me_to(), these need * to be provided by the ddev_ops_t.get_gc. Different values are needed * for a DDF driver or a regular server. This would not be needed if we * had a proper way of creating an endpoint and passing it to our client. */ static void ddev_get_gc_srv(ddev_srv_t *srv, ipc_call_t *icall) { sysarg_t arg2; sysarg_t arg3; errno_t rc; if (srv->ops->get_gc == NULL) { async_answer_0(icall, ENOTSUP); return; } rc = srv->ops->get_gc(srv->arg, &arg2, &arg3); async_answer_2(icall, rc, arg2, arg3); } /** Get display device information */ static void ddev_get_info_srv(ddev_srv_t *srv, ipc_call_t *icall) { ddev_info_t info; errno_t rc; ipc_call_t call; size_t size; if (!async_data_read_receive(&call, &size)) { async_answer_0(&call, EREFUSED); async_answer_0(icall, EREFUSED); return; } if (size != sizeof(ddev_info_t)) { async_answer_0(&call, EINVAL); async_answer_0(icall, EINVAL); return; } if (srv->ops->get_info == NULL) { async_answer_0(&call, ENOTSUP); async_answer_0(icall, ENOTSUP); return; } rc = srv->ops->get_info(srv->arg, &info); if (rc != EOK) { async_answer_0(&call, rc); async_answer_0(icall, rc); return; } rc = async_data_read_finalize(&call, &info, sizeof(ddev_info_t)); if (rc != EOK) { async_answer_0(&call, rc); async_answer_0(icall, rc); return; } async_answer_0(icall, EOK); } void ddev_conn(ipc_call_t *icall, ddev_srv_t *srv) { /* Accept the connection */ async_accept_0(icall); while (true) { ipc_call_t call; async_get_call(&call); sysarg_t method = ipc_get_imethod(&call); if (!method) { /* The other side has hung up */ async_answer_0(&call, EOK); break; } switch (method) { case DDEV_GET_GC: ddev_get_gc_srv(srv, &call); break; case DDEV_GET_INFO: ddev_get_info_srv(srv, &call); break; default: async_answer_0(&call, ENOTSUP); } } /* Hang up callback session */ if (srv->client_sess != NULL) { async_hangup(srv->client_sess); srv->client_sess = NULL; } } /** Initialize display device server structure * * @param srv Display device server structure to initialize */ void ddev_srv_initialize(ddev_srv_t *srv) { memset(srv, 0, sizeof(*srv)); } /** @} */