blob: 179351617543940afbed6dd169db0e906d47cd3b [file] [log] [blame]
/* Copyright (c) 2010, Code Aurora Forum. 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.
*
*/
/*
* SMD RPCROUTER XDR module.
*/
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <mach/msm_rpcrouter.h>
int xdr_send_uint32(struct msm_rpc_xdr *xdr, const uint32_t *value)
{
if ((xdr->out_index + sizeof(uint32_t)) > xdr->out_size) {
pr_err("%s: xdr out buffer full\n", __func__);
return -1;
}
*(uint32_t *)(xdr->out_buf + xdr->out_index) = cpu_to_be32(*value);
xdr->out_index += sizeof(uint32_t);
return 0;
}
int xdr_send_int8(struct msm_rpc_xdr *xdr, const int8_t *value)
{
return xdr_send_uint32(xdr, (uint32_t *)value);
}
int xdr_send_uint8(struct msm_rpc_xdr *xdr, const uint8_t *value)
{
return xdr_send_uint32(xdr, (uint32_t *)value);
}
int xdr_send_int16(struct msm_rpc_xdr *xdr, const int16_t *value)
{
return xdr_send_uint32(xdr, (uint32_t *)value);
}
int xdr_send_uint16(struct msm_rpc_xdr *xdr, const uint16_t *value)
{
return xdr_send_uint32(xdr, (uint32_t *)value);
}
int xdr_send_int32(struct msm_rpc_xdr *xdr, const int32_t *value)
{
return xdr_send_uint32(xdr, (uint32_t *)value);
}
int xdr_send_bytes(struct msm_rpc_xdr *xdr, const void **data,
uint32_t *size)
{
void *buf = xdr->out_buf + xdr->out_index;
uint32_t temp;
if (!size || !data || !*data)
return -1;
temp = *size;
if (temp & 0x3)
temp += 4 - (temp & 0x3);
temp += sizeof(uint32_t);
if ((xdr->out_index + temp) > xdr->out_size) {
pr_err("%s: xdr out buffer full\n", __func__);
return -1;
}
*((uint32_t *)buf) = cpu_to_be32(*size);
buf += sizeof(uint32_t);
memcpy(buf, *data, *size);
buf += *size;
if (*size & 0x3) {
memset(buf, 0, 4 - (*size & 0x3));
buf += 4 - (*size & 0x3);
}
xdr->out_index = buf - xdr->out_buf;
return 0;
}
int xdr_recv_uint32(struct msm_rpc_xdr *xdr, uint32_t *value)
{
if ((xdr->in_index + sizeof(uint32_t)) > xdr->in_size) {
pr_err("%s: xdr in buffer full\n", __func__);
return -1;
}
*value = be32_to_cpu(*(uint32_t *)(xdr->in_buf + xdr->in_index));
xdr->in_index += sizeof(uint32_t);
return 0;
}
int xdr_recv_int8(struct msm_rpc_xdr *xdr, int8_t *value)
{
return xdr_recv_uint32(xdr, (uint32_t *)value);
}
int xdr_recv_uint8(struct msm_rpc_xdr *xdr, uint8_t *value)
{
return xdr_recv_uint32(xdr, (uint32_t *)value);
}
int xdr_recv_int16(struct msm_rpc_xdr *xdr, int16_t *value)
{
return xdr_recv_uint32(xdr, (uint32_t *)value);
}
int xdr_recv_uint16(struct msm_rpc_xdr *xdr, uint16_t *value)
{
return xdr_recv_uint32(xdr, (uint32_t *)value);
}
int xdr_recv_int32(struct msm_rpc_xdr *xdr, int32_t *value)
{
return xdr_recv_uint32(xdr, (uint32_t *)value);
}
int xdr_recv_bytes(struct msm_rpc_xdr *xdr, void **data,
uint32_t *size)
{
void *buf = xdr->in_buf + xdr->in_index;
uint32_t temp;
if (!size || !data)
return -1;
*size = be32_to_cpu(*(uint32_t *)buf);
buf += sizeof(uint32_t);
temp = *size;
if (temp & 0x3)
temp += 4 - (temp & 0x3);
temp += sizeof(uint32_t);
if ((xdr->in_index + temp) > xdr->in_size) {
pr_err("%s: xdr in buffer full\n", __func__);
return -1;
}
if (*size) {
*data = kmalloc(*size, GFP_KERNEL);
if (!*data)
return -1;
memcpy(*data, buf, *size);
buf += *size;
if (*size & 0x3)
buf += 4 - (*size & 0x3);
} else
*data = NULL;
xdr->in_index = buf - xdr->in_buf;
return 0;
}
int xdr_send_pointer(struct msm_rpc_xdr *xdr, void **obj,
uint32_t obj_size, void *xdr_op)
{
uint32_t ptr_valid, rc;
ptr_valid = (*obj != NULL);
rc = xdr_send_uint32(xdr, &ptr_valid);
if (rc)
return rc;
if (!ptr_valid)
return 0;
return ((int (*) (struct msm_rpc_xdr *, void *))xdr_op)(xdr, *obj);
}
int xdr_recv_pointer(struct msm_rpc_xdr *xdr, void **obj,
uint32_t obj_size, void *xdr_op)
{
uint32_t rc, ptr_valid = 0;
rc = xdr_recv_uint32(xdr, &ptr_valid);
if (rc)
return rc;
if (!ptr_valid) {
*obj = NULL;
return 0;
}
*obj = kmalloc(obj_size, GFP_KERNEL);
if (!*obj)
return -1;
rc = ((int (*) (struct msm_rpc_xdr *, void *))xdr_op)(xdr, *obj);
if (rc)
kfree(*obj);
return rc;
}
int xdr_send_array(struct msm_rpc_xdr *xdr, void **addr, uint32_t *size,
uint32_t maxsize, uint32_t elm_size, void *xdr_op)
{
int i, rc;
void *tmp_addr = *addr;
if (!size || !tmp_addr || (*size > maxsize) || !xdr_op)
return -1;
rc = xdr_send_uint32(xdr, size);
if (rc)
return rc;
for (i = 0; i < *size; i++) {
rc = ((int (*) (struct msm_rpc_xdr *, void *))xdr_op)
(xdr, tmp_addr);
if (rc)
return rc;
tmp_addr += elm_size;
}
return 0;
}
int xdr_recv_array(struct msm_rpc_xdr *xdr, void **addr, uint32_t *size,
uint32_t maxsize, uint32_t elm_size, void *xdr_op)
{
int i, rc;
void *tmp_addr;
if (!size || !xdr_op)
return -1;
rc = xdr_recv_uint32(xdr, size);
if (rc)
return rc;
if (*size > maxsize)
return -1;
tmp_addr = kmalloc((*size * elm_size), GFP_KERNEL);
if (!tmp_addr)
return -1;
*addr = tmp_addr;
for (i = 0; i < *size; i++) {
rc = ((int (*) (struct msm_rpc_xdr *, void *))xdr_op)
(xdr, tmp_addr);
if (rc) {
kfree(*addr);
*addr = NULL;
return rc;
}
tmp_addr += elm_size;
}
return 0;
}
int xdr_recv_req(struct msm_rpc_xdr *xdr, struct rpc_request_hdr *req)
{
int rc = 0;
if (!req)
return -1;
rc |= xdr_recv_uint32(xdr, &req->xid); /* xid */
rc |= xdr_recv_uint32(xdr, &req->type); /* type */
rc |= xdr_recv_uint32(xdr, &req->rpc_vers); /* rpc_vers */
rc |= xdr_recv_uint32(xdr, &req->prog); /* prog */
rc |= xdr_recv_uint32(xdr, &req->vers); /* vers */
rc |= xdr_recv_uint32(xdr, &req->procedure); /* procedure */
rc |= xdr_recv_uint32(xdr, &req->cred_flavor); /* cred_flavor */
rc |= xdr_recv_uint32(xdr, &req->cred_length); /* cred_length */
rc |= xdr_recv_uint32(xdr, &req->verf_flavor); /* verf_flavor */
rc |= xdr_recv_uint32(xdr, &req->verf_length); /* verf_length */
return rc;
}
int xdr_recv_reply(struct msm_rpc_xdr *xdr, struct rpc_reply_hdr *reply)
{
int rc = 0;
if (!reply)
return -1;
rc |= xdr_recv_uint32(xdr, &reply->xid); /* xid */
rc |= xdr_recv_uint32(xdr, &reply->type); /* type */
rc |= xdr_recv_uint32(xdr, &reply->reply_stat); /* reply_stat */
/* acc_hdr */
if (reply->reply_stat == RPCMSG_REPLYSTAT_ACCEPTED) {
rc |= xdr_recv_uint32(xdr, &reply->data.acc_hdr.verf_flavor);
rc |= xdr_recv_uint32(xdr, &reply->data.acc_hdr.verf_length);
rc |= xdr_recv_uint32(xdr, &reply->data.acc_hdr.accept_stat);
}
return rc;
}
int xdr_start_request(struct msm_rpc_xdr *xdr, uint32_t prog,
uint32_t ver, uint32_t proc)
{
mutex_lock(&xdr->out_lock);
/* TODO: replace below function with its implementation */
msm_rpc_setup_req((struct rpc_request_hdr *)xdr->out_buf,
prog, ver, proc);
xdr->out_index = sizeof(struct rpc_request_hdr);
return 0;
}
int xdr_start_accepted_reply(struct msm_rpc_xdr *xdr, uint32_t accept_status)
{
struct rpc_reply_hdr *reply;
mutex_lock(&xdr->out_lock);
/* TODO: err if xdr is not cb xdr */
reply = (struct rpc_reply_hdr *)xdr->out_buf;
/* TODO: use xdr functions instead */
reply->xid = ((struct rpc_request_hdr *)(xdr->in_buf))->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;
xdr->out_index = sizeof(*reply);
return 0;
}
int xdr_send_msg(struct msm_rpc_xdr *xdr)
{
int rc = 0;
rc = msm_rpc_write(xdr->ept, xdr->out_buf,
xdr->out_index);
if (rc > 0)
rc = 0;
mutex_unlock(&xdr->out_lock);
return rc;
}
void xdr_init(struct msm_rpc_xdr *xdr)
{
mutex_init(&xdr->out_lock);
init_waitqueue_head(&xdr->in_buf_wait_q);
xdr->in_buf = NULL;
xdr->in_size = 0;
xdr->in_index = 0;
xdr->out_buf = NULL;
xdr->out_size = 0;
xdr->out_index = 0;
}
void xdr_init_input(struct msm_rpc_xdr *xdr, void *buf, uint32_t size)
{
wait_event(xdr->in_buf_wait_q, !(xdr->in_buf));
xdr->in_buf = buf;
xdr->in_size = size;
xdr->in_index = 0;
}
void xdr_init_output(struct msm_rpc_xdr *xdr, void *buf, uint32_t size)
{
xdr->out_buf = buf;
xdr->out_size = size;
xdr->out_index = 0;
}
void xdr_clean_input(struct msm_rpc_xdr *xdr)
{
kfree(xdr->in_buf);
xdr->in_size = 0;
xdr->in_index = 0;
xdr->in_buf = NULL;
wake_up(&xdr->in_buf_wait_q);
}
void xdr_clean_output(struct msm_rpc_xdr *xdr)
{
kfree(xdr->out_buf);
xdr->out_buf = NULL;
xdr->out_size = 0;
xdr->out_index = 0;
}
uint32_t xdr_read_avail(struct msm_rpc_xdr *xdr)
{
return xdr->in_size;
}