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/* Copyright (c) 2010, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*
*/
/*
* DOG KEEPALIVE RPC CLIENT MODULE
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <mach/msm_rpcrouter.h>
#define DOG_KEEPALIVE_PROG 0x300000A2
#define DOG_KEEPALIVE_VERS 0x00010001
#define DOG_KEEPALIVE_REGISTER_PROC 2
#define DOG_KEEPALIVE_UNREGISTER_PROC 3
#define DOG_KEEPALIVE_CB_PROC 1
static int dog_keepalive_debug;
module_param_named(debug, dog_keepalive_debug,
int, S_IRUGO | S_IWUSR | S_IWGRP);
#if defined(DEBUG)
#define DBG(x...) do { \
if (dog_keepalive_debug) \
printk(KERN_INFO x); \
} while (0)
#else
#define DBG(x...) do { } while (0)
#endif
static struct msm_rpc_client *dog_keepalive_rpc_client;
static int32_t dog_clnt_id = -1;
struct dog_keepalive_cb_arg {
uint32_t cb_id;
};
struct dog_keepalive_cb_ret {
uint32_t result;
};
static int dog_keepalive_cb(struct msm_rpc_client *client,
struct msm_rpc_xdr *xdr)
{
int rc;
void *cb_func;
uint32_t accept_status;
struct dog_keepalive_cb_arg arg;
struct dog_keepalive_cb_ret ret;
xdr_recv_uint32(xdr, &arg.cb_id); /* cb_id */
cb_func = msm_rpc_get_cb_func(client, arg.cb_id);
if (cb_func) {
rc = ((int (*)
(struct dog_keepalive_cb_arg *,
struct dog_keepalive_cb_ret *))
cb_func)(&arg, &ret);
if (rc)
accept_status = RPC_ACCEPTSTAT_SYSTEM_ERR;
else
accept_status = RPC_ACCEPTSTAT_SUCCESS;
} else
accept_status = RPC_ACCEPTSTAT_SYSTEM_ERR;
xdr_start_accepted_reply(xdr, accept_status);
if (accept_status == RPC_ACCEPTSTAT_SUCCESS)
xdr_send_uint32(xdr, &ret.result); /* result */
rc = xdr_send_msg(xdr);
if (rc)
pr_err("%s: send accepted reply failed: %d\n", __func__, rc);
return rc;
}
static int dog_keepalive_cb_func(struct msm_rpc_client *client,
struct rpc_request_hdr *req,
struct msm_rpc_xdr *xdr)
{
int rc = 0;
switch (req->procedure) {
case DOG_KEEPALIVE_CB_PROC:
rc = dog_keepalive_cb(client, xdr);
break;
default:
pr_err("%s: procedure not supported %d\n",
__func__, req->procedure);
xdr_start_accepted_reply(xdr, RPC_ACCEPTSTAT_PROC_UNAVAIL);
rc = xdr_send_msg(xdr);
if (rc)
pr_err("%s: sending reply failed: %d\n", __func__, rc);
break;
}
return rc;
}
struct dog_keepalive_register_arg {
int (*cb_func)(
struct dog_keepalive_cb_arg *arg,
struct dog_keepalive_cb_ret *ret);
uint32_t response_msec;
uint32_t clnt_id_valid;
};
struct dog_keepalive_register_ret {
uint32_t *clnt_id;
uint32_t result;
};
static int dog_keepalive_register_arg_func(struct msm_rpc_client *client,
struct msm_rpc_xdr *xdr, void *data)
{
struct dog_keepalive_register_arg *arg = data;
int cb_id;
/* cb_func */
cb_id = msm_rpc_add_cb_func(client, (void *)arg->cb_func);
if ((cb_id < 0) && (cb_id != MSM_RPC_CLIENT_NULL_CB_ID))
return cb_id;
xdr_send_uint32(xdr, &cb_id);
xdr_send_uint32(xdr, &arg->response_msec); /* response_msec */
xdr_send_uint32(xdr, &arg->clnt_id_valid); /* clnt_id valid */
return 0;
}
static int dog_keepalive_register_ret_func(struct msm_rpc_client *client,
struct msm_rpc_xdr *xdr, void *data)
{
struct dog_keepalive_register_ret *ret = data;
/* clnt_id */
xdr_recv_pointer(xdr, (void **)&(ret->clnt_id), sizeof(uint32_t),
xdr_recv_uint32);
/* result */
xdr_recv_uint32(xdr, &ret->result);
return 0;
}
static int dog_keepalive_register_func(struct msm_rpc_client *client,
struct dog_keepalive_register_arg *arg,
struct dog_keepalive_register_ret *ret)
{
return msm_rpc_client_req2(client,
DOG_KEEPALIVE_REGISTER_PROC,
dog_keepalive_register_arg_func, arg,
dog_keepalive_register_ret_func, ret, -1);
}
static int dog_keepalive_cb_proc_func(struct dog_keepalive_cb_arg *arg,
struct dog_keepalive_cb_ret *ret)
{
DBG("%s: received, client %d \n", __func__, dog_clnt_id);
ret->result = 1;
return 0;
}
static void dog_keepalive_register(void)
{
struct dog_keepalive_register_arg arg;
struct dog_keepalive_register_ret ret;
int rc;
arg.cb_func = dog_keepalive_cb_proc_func;
arg.response_msec = 1000;
arg.clnt_id_valid = 1;
ret.clnt_id = NULL;
rc = dog_keepalive_register_func(dog_keepalive_rpc_client,
&arg, &ret);
if (rc)
pr_err("%s: register request failed\n", __func__);
else
dog_clnt_id = *ret.clnt_id;
kfree(ret.clnt_id);
DBG("%s: register complete\n", __func__);
}
/* Registration with the platform driver for notification on the availability
* of the DOG_KEEPALIVE remote server
*/
static int dog_keepalive_init_probe(struct platform_device *pdev)
{
DBG("%s: probe called\n", __func__);
dog_keepalive_rpc_client = msm_rpc_register_client2(
"dog-keepalive",
DOG_KEEPALIVE_PROG,
DOG_KEEPALIVE_VERS,
0, dog_keepalive_cb_func);
if (IS_ERR(dog_keepalive_rpc_client)) {
pr_err("%s: RPC client creation failed\n", __func__);
return PTR_ERR(dog_keepalive_rpc_client);
}
/* Send RPC call to register for callbacks */
dog_keepalive_register();
return 0;
}
static char dog_keepalive_driver_name[] = "rs00000000";
static struct platform_driver dog_keepalive_init_driver = {
.probe = dog_keepalive_init_probe,
.driver = {
.owner = THIS_MODULE,
},
};
static int __init rpc_dog_keepalive_init(void)
{
snprintf(dog_keepalive_driver_name, sizeof(dog_keepalive_driver_name),
"rs%08x", DOG_KEEPALIVE_PROG);
dog_keepalive_init_driver.driver.name = dog_keepalive_driver_name;
return platform_driver_register(&dog_keepalive_init_driver);
}
late_initcall(rpc_dog_keepalive_init);
MODULE_DESCRIPTION("DOG KEEPALIVE RPC CLIENT");
MODULE_LICENSE("GPL v2");
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