M7350/kernel/arch/arm/mach-msm/oem_rapi_client.c
2024-09-09 08:52:07 +00:00

358 lines
9.1 KiB
C

/* Copyright (c) 2009-2010, 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.
*
*/
/*
* OEM RAPI CLIENT Driver source file
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <mach/msm_rpcrouter.h>
#include <mach/oem_rapi_client.h>
#define OEM_RAPI_PROG 0x3000006B
#define OEM_RAPI_VERS 0x00010001
#define OEM_RAPI_NULL_PROC 0
#define OEM_RAPI_RPC_GLUE_CODE_INFO_REMOTE_PROC 1
#define OEM_RAPI_STREAMING_FUNCTION_PROC 2
#define OEM_RAPI_CLIENT_MAX_OUT_BUFF_SIZE 128
static struct msm_rpc_client *rpc_client;
static uint32_t open_count;
static DEFINE_MUTEX(oem_rapi_client_lock);
/* TODO: check where to allocate memory for return */
static int oem_rapi_client_cb(struct msm_rpc_client *client,
struct rpc_request_hdr *req,
struct msm_rpc_xdr *xdr)
{
uint32_t cb_id, accept_status;
int rc;
void *cb_func;
uint32_t temp;
struct oem_rapi_client_streaming_func_cb_arg arg;
struct oem_rapi_client_streaming_func_cb_ret ret;
arg.input = NULL;
ret.out_len = NULL;
ret.output = NULL;
xdr_recv_uint32(xdr, &cb_id); /* cb_id */
xdr_recv_uint32(xdr, &arg.event); /* enum */
xdr_recv_uint32(xdr, (uint32_t *)(&arg.handle)); /* handle */
xdr_recv_uint32(xdr, &arg.in_len); /* in_len */
xdr_recv_bytes(xdr, (void **)&arg.input, &temp); /* input */
xdr_recv_uint32(xdr, &arg.out_len_valid); /* out_len */
if (arg.out_len_valid) {
ret.out_len = kmalloc(sizeof(*ret.out_len), GFP_KERNEL);
if (!ret.out_len) {
accept_status = RPC_ACCEPTSTAT_SYSTEM_ERR;
goto oem_rapi_send_ack;
}
}
xdr_recv_uint32(xdr, &arg.output_valid); /* out */
if (arg.output_valid) {
xdr_recv_uint32(xdr, &arg.output_size); /* ouput_size */
ret.output = kmalloc(arg.output_size, GFP_KERNEL);
if (!ret.output) {
accept_status = RPC_ACCEPTSTAT_SYSTEM_ERR;
goto oem_rapi_send_ack;
}
}
cb_func = msm_rpc_get_cb_func(client, cb_id);
if (cb_func) {
rc = ((int (*)(struct oem_rapi_client_streaming_func_cb_arg *,
struct oem_rapi_client_streaming_func_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;
oem_rapi_send_ack:
xdr_start_accepted_reply(xdr, accept_status);
if (accept_status == RPC_ACCEPTSTAT_SUCCESS) {
uint32_t temp = sizeof(uint32_t);
xdr_send_pointer(xdr, (void **)&(ret.out_len), temp,
xdr_send_uint32);
/* output */
if (ret.output && ret.out_len)
xdr_send_bytes(xdr, (const void **)&ret.output,
ret.out_len);
else {
temp = 0;
xdr_send_uint32(xdr, &temp);
}
}
rc = xdr_send_msg(xdr);
if (rc)
pr_err("%s: sending reply failed: %d\n", __func__, rc);
kfree(arg.input);
kfree(ret.out_len);
kfree(ret.output);
return 0;
}
static int oem_rapi_client_streaming_function_arg(struct msm_rpc_client *client,
struct msm_rpc_xdr *xdr,
void *data)
{
int cb_id;
struct oem_rapi_client_streaming_func_arg *arg = data;
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, &arg->event); /* enum */
xdr_send_uint32(xdr, &cb_id); /* cb_id */
xdr_send_uint32(xdr, (uint32_t *)(&arg->handle)); /* handle */
xdr_send_uint32(xdr, &arg->in_len); /* in_len */
xdr_send_bytes(xdr, (const void **)&arg->input,
&arg->in_len); /* input */
xdr_send_uint32(xdr, &arg->out_len_valid); /* out_len */
xdr_send_uint32(xdr, &arg->output_valid); /* output */
/* output_size */
if (arg->output_valid)
xdr_send_uint32(xdr, &arg->output_size);
return 0;
}
static int oem_rapi_client_streaming_function_ret(struct msm_rpc_client *client,
struct msm_rpc_xdr *xdr,
void *data)
{
struct oem_rapi_client_streaming_func_ret *ret = data;
uint32_t temp;
/* out_len */
xdr_recv_pointer(xdr, (void **)&(ret->out_len), sizeof(uint32_t),
xdr_recv_uint32);
/* output */
if (ret->out_len && *ret->out_len)
xdr_recv_bytes(xdr, (void **)&ret->output, &temp);
return 0;
}
int oem_rapi_client_streaming_function(
struct msm_rpc_client *client,
struct oem_rapi_client_streaming_func_arg *arg,
struct oem_rapi_client_streaming_func_ret *ret)
{
return msm_rpc_client_req2(client,
OEM_RAPI_STREAMING_FUNCTION_PROC,
oem_rapi_client_streaming_function_arg, arg,
oem_rapi_client_streaming_function_ret,
ret, -1);
}
EXPORT_SYMBOL(oem_rapi_client_streaming_function);
int oem_rapi_client_close(void)
{
mutex_lock(&oem_rapi_client_lock);
if (--open_count == 0) {
msm_rpc_unregister_client(rpc_client);
pr_info("%s: disconnected from remote oem rapi server\n",
__func__);
}
mutex_unlock(&oem_rapi_client_lock);
return 0;
}
EXPORT_SYMBOL(oem_rapi_client_close);
struct msm_rpc_client *oem_rapi_client_init(void)
{
mutex_lock(&oem_rapi_client_lock);
if (open_count == 0) {
rpc_client = msm_rpc_register_client2("oemrapiclient",
OEM_RAPI_PROG,
OEM_RAPI_VERS, 0,
oem_rapi_client_cb);
if (!IS_ERR(rpc_client))
open_count++;
}
mutex_unlock(&oem_rapi_client_lock);
return rpc_client;
}
EXPORT_SYMBOL(oem_rapi_client_init);
#if defined(CONFIG_DEBUG_FS)
static struct dentry *dent;
static int oem_rapi_client_test_res;
static int oem_rapi_client_null(struct msm_rpc_client *client,
void *arg, void *ret)
{
return msm_rpc_client_req2(client, OEM_RAPI_NULL_PROC,
NULL, NULL, NULL, NULL, -1);
}
static int oem_rapi_client_test_streaming_cb_func(
struct oem_rapi_client_streaming_func_cb_arg *arg,
struct oem_rapi_client_streaming_func_cb_ret *ret)
{
uint32_t size;
size = (arg->in_len < OEM_RAPI_CLIENT_MAX_OUT_BUFF_SIZE) ?
arg->in_len : OEM_RAPI_CLIENT_MAX_OUT_BUFF_SIZE;
if (ret->out_len != 0)
*ret->out_len = size;
if (ret->output != 0)
memcpy(ret->output, arg->input, size);
return 0;
}
static ssize_t debug_read(struct file *fp, char __user *buf,
size_t count, loff_t *pos)
{
char _buf[16];
snprintf(_buf, sizeof(_buf), "%i\n", oem_rapi_client_test_res);
return simple_read_from_buffer(buf, count, pos, _buf, strlen(_buf));
}
static ssize_t debug_write(struct file *fp, const char __user *buf,
size_t count, loff_t *pos)
{
char input[OEM_RAPI_CLIENT_MAX_OUT_BUFF_SIZE];
struct oem_rapi_client_streaming_func_arg arg;
struct oem_rapi_client_streaming_func_ret ret;
unsigned char cmd[64];
int len;
if (count < 1)
return 0;
len = count > 63 ? 63 : count;
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = 0;
if (cmd[len-1] == '\n') {
cmd[len-1] = 0;
len--;
}
if (!strncmp(cmd, "null", 64)) {
oem_rapi_client_test_res = oem_rapi_client_null(rpc_client,
NULL, NULL);
} else if (!strncmp(cmd, "streaming_func", 64)) {
memset(input, 5, 16);
arg.event = 0;
arg.cb_func = oem_rapi_client_test_streaming_cb_func;
arg.handle = (void *)20;
arg.in_len = 16;
arg.input = input;
arg.out_len_valid = 1;
arg.output_valid = 1;
arg.output_size = OEM_RAPI_CLIENT_MAX_OUT_BUFF_SIZE;
ret.out_len = NULL;
ret.output = NULL;
oem_rapi_client_test_res = oem_rapi_client_streaming_function(
rpc_client, &arg, &ret);
kfree(ret.out_len);
kfree(ret.output);
} else
oem_rapi_client_test_res = -EINVAL;
if (oem_rapi_client_test_res)
pr_err("oem rapi client test fail %d\n",
oem_rapi_client_test_res);
else
pr_info("oem rapi client test passed\n");
return count;
}
static int debug_release(struct inode *ip, struct file *fp)
{
return oem_rapi_client_close();
}
static int debug_open(struct inode *ip, struct file *fp)
{
struct msm_rpc_client *client;
client = oem_rapi_client_init();
if (IS_ERR(client)) {
pr_err("%s: couldn't open oem rapi client\n", __func__);
return PTR_ERR(client);
} else
pr_info("%s: connected to remote oem rapi server\n", __func__);
return 0;
}
static const struct file_operations debug_ops = {
.owner = THIS_MODULE,
.open = debug_open,
.release = debug_release,
.read = debug_read,
.write = debug_write,
};
static void __exit oem_rapi_client_mod_exit(void)
{
debugfs_remove(dent);
}
static int __init oem_rapi_client_mod_init(void)
{
dent = debugfs_create_file("oem_rapi", 0444, 0, NULL, &debug_ops);
open_count = 0;
oem_rapi_client_test_res = -1;
return 0;
}
module_init(oem_rapi_client_mod_init);
module_exit(oem_rapi_client_mod_exit);
#endif
MODULE_DESCRIPTION("OEM RAPI CLIENT Driver");
MODULE_LICENSE("GPL v2");