diff options
Diffstat (limited to 'drivers/staging/dream/smd/smd_rpcrouter_servers.c')
| -rw-r--r-- | drivers/staging/dream/smd/smd_rpcrouter_servers.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/drivers/staging/dream/smd/smd_rpcrouter_servers.c b/drivers/staging/dream/smd/smd_rpcrouter_servers.c new file mode 100644 index 000000000000..2597bbbc6f5e --- /dev/null +++ b/drivers/staging/dream/smd/smd_rpcrouter_servers.c @@ -0,0 +1,229 @@ +/* arch/arm/mach-msm/rpc_servers.c + * + * Copyright (C) 2007 Google, Inc. + * Author: Iliyan Malchev <ibm@android.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/cdev.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/types.h> +#include <linux/fs.h> +#include <linux/kthread.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/wakelock.h> + +#include <linux/msm_rpcrouter.h> +#include <linux/uaccess.h> + +#include <mach/msm_rpcrouter.h> +#include "smd_rpcrouter.h" + +static struct msm_rpc_endpoint *endpoint; + +#define FLAG_REGISTERED 0x0001 + +static LIST_HEAD(rpc_server_list); +static DEFINE_MUTEX(rpc_server_list_lock); +static int rpc_servers_active; +static struct wake_lock rpc_servers_wake_lock; + +static void rpc_server_register(struct msm_rpc_server *server) +{ + int rc; + rc = msm_rpc_register_server(endpoint, server->prog, server->vers); + if (rc < 0) + printk(KERN_ERR "[rpcserver] error registering %p @ %08x:%d\n", + server, server->prog, server->vers); +} + +static struct msm_rpc_server *rpc_server_find(uint32_t prog, uint32_t vers) +{ + struct msm_rpc_server *server; + + mutex_lock(&rpc_server_list_lock); + list_for_each_entry(server, &rpc_server_list, list) { + if ((server->prog == prog) && +#if CONFIG_MSM_AMSS_VERSION >= 6350 + msm_rpc_is_compatible_version(server->vers, vers)) { +#else + server->vers == vers) { +#endif + mutex_unlock(&rpc_server_list_lock); + return server; + } + } + mutex_unlock(&rpc_server_list_lock); + return NULL; +} + +static void rpc_server_register_all(void) +{ + struct msm_rpc_server *server; + + mutex_lock(&rpc_server_list_lock); + list_for_each_entry(server, &rpc_server_list, list) { + if (!(server->flags & FLAG_REGISTERED)) { + rpc_server_register(server); + server->flags |= FLAG_REGISTERED; + } + } + mutex_unlock(&rpc_server_list_lock); +} + +int msm_rpc_create_server(struct msm_rpc_server *server) +{ + /* make sure we're in a sane state first */ + server->flags = 0; + INIT_LIST_HEAD(&server->list); + + mutex_lock(&rpc_server_list_lock); + list_add(&server->list, &rpc_server_list); + if (rpc_servers_active) { + rpc_server_register(server); + server->flags |= FLAG_REGISTERED; + } + mutex_unlock(&rpc_server_list_lock); + + return 0; +} + +static int rpc_send_accepted_void_reply(struct msm_rpc_endpoint *client, + uint32_t xid, uint32_t accept_status) +{ + int rc = 0; + uint8_t reply_buf[sizeof(struct rpc_reply_hdr)]; + struct rpc_reply_hdr *reply = (struct rpc_reply_hdr *)reply_buf; + + reply->xid = cpu_to_be32(xid); + reply->type = cpu_to_be32(1); /* reply */ + reply->reply_stat = cpu_to_be32(RPCMSG_REPLYSTAT_ACCEPTED); + + reply->data.acc_hdr.accept_stat = cpu_to_be32(accept_status); + reply->data.acc_hdr.verf_flavor = 0; + reply->data.acc_hdr.verf_length = 0; + + rc = msm_rpc_write(client, reply_buf, sizeof(reply_buf)); + if (rc < 0) + printk(KERN_ERR + "%s: could not write response: %d\n", + __FUNCTION__, rc); + + return rc; +} + +static int rpc_servers_thread(void *data) +{ + void *buffer; + struct rpc_request_hdr *req; + struct msm_rpc_server *server; + int rc; + + for (;;) { + wake_unlock(&rpc_servers_wake_lock); + rc = wait_event_interruptible(endpoint->wait_q, + !list_empty(&endpoint->read_q)); + wake_lock(&rpc_servers_wake_lock); + rc = msm_rpc_read(endpoint, &buffer, -1, -1); + if (rc < 0) { + printk(KERN_ERR "%s: could not read: %d\n", + __FUNCTION__, rc); + break; + } + req = (struct rpc_request_hdr *)buffer; + + req->type = be32_to_cpu(req->type); + req->xid = be32_to_cpu(req->xid); + req->rpc_vers = be32_to_cpu(req->rpc_vers); + req->prog = be32_to_cpu(req->prog); + req->vers = be32_to_cpu(req->vers); + req->procedure = be32_to_cpu(req->procedure); + + server = rpc_server_find(req->prog, req->vers); + + if (req->rpc_vers != 2) + continue; + if (req->type != 0) + continue; + if (!server) { + rpc_send_accepted_void_reply( + endpoint, req->xid, + RPC_ACCEPTSTAT_PROG_UNAVAIL); + continue; + } + + rc = server->rpc_call(server, req, rc); + + switch (rc) { + case 0: + rpc_send_accepted_void_reply( + endpoint, req->xid, + RPC_ACCEPTSTAT_SUCCESS); + break; + default: + rpc_send_accepted_void_reply( + endpoint, req->xid, + RPC_ACCEPTSTAT_PROG_UNAVAIL); + break; + } + + kfree(buffer); + } + + do_exit(0); +} + +static int rpcservers_probe(struct platform_device *pdev) +{ + struct task_struct *server_thread; + + endpoint = msm_rpc_open(); + if (IS_ERR(endpoint)) + return PTR_ERR(endpoint); + + /* we're online -- register any servers installed beforehand */ + rpc_servers_active = 1; + rpc_server_register_all(); + + /* start the kernel thread */ + server_thread = kthread_run(rpc_servers_thread, NULL, "krpcserversd"); + if (IS_ERR(server_thread)) + return PTR_ERR(server_thread); + + return 0; +} + +static struct platform_driver rpcservers_driver = { + .probe = rpcservers_probe, + .driver = { + .name = "oncrpc_router", + .owner = THIS_MODULE, + }, +}; + +static int __init rpc_servers_init(void) +{ + wake_lock_init(&rpc_servers_wake_lock, WAKE_LOCK_SUSPEND, "rpc_server"); + return platform_driver_register(&rpcservers_driver); +} + +module_init(rpc_servers_init); + +MODULE_DESCRIPTION("MSM RPC Servers"); +MODULE_AUTHOR("Iliyan Malchev <ibm@android.com>"); +MODULE_LICENSE("GPL"); |