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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/lib/occlib/ipc_init.c $ */
/* */
/* OpenPOWER OnChipController Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015,2017 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
/// \file ipc_init.c
/// \brief Implementation of IPC (InterProcessor Communication) routines for
/// Setting up the IPC function tables, messages and message queues.
///
/// NOTE: The functions that these interfaces peform can all be done statically.
/// This code will not be included in an image if none of the functions are
/// referenced.
#include "ipc_api.h"
#include "ipc_ping.h"
///////////////////////////////////////////////////////////////////////////////
/// Associate an IPC function ID with a handler function
///
int ipc_set_handler(uint32_t function_id,
ipc_msg_handler_t handler,
void* callback_arg)
{
ipc_func_table_entry_t* func_table;
uint32_t table_limit;
int rc = IPC_RC_SUCCESS;
ipc_func_id_t func_id = {{0}};
do
{
func_id.word32 = function_id;
//setup for multi-target commands
if(func_id.multi_target_flag)
{
table_limit = IPC_MT_NUM_FUNCIDS;
func_table = G_ipc_mt_handlers;
}
//setup for single-target commands
else
{
//make sure the function id targets this processor
if(func_id.target_id != OCCHW_INST_ID_SELF)
{
rc = IPC_RC_INVALID_TARGET_ID;
break;
}
table_limit = IPC_ST_NUM_FUNCIDS;
func_table = G_ipc_st_handlers;
}
//make sure the function id is valid
if((func_id.table_index >= table_limit) || !func_id.valid_flag)
{
rc = IPC_RC_INVALID_FUNC_ID;
break;
}
if(!handler)
{
rc = IPC_RC_INVALID_ARG;
break;
}
func_table[func_id.table_index].handler = handler;
func_table[func_id.table_index].arg = callback_arg;
}
while(0);
return rc;
}
///////////////////////////////////////////////////////////////////////////////
/// Initialize an IPC command message
///
void ipc_init_msg(ipc_msg_t* msg,
uint32_t func_id,
ipc_msg_handler_t resp_callback,
void* callback_arg)
{
KERN_DEQUE_ELEMENT_CREATE(&msg->node);
msg->func_id.word32 = func_id;
msg->ipc_rc = IPC_RC_SUCCESS;
msg->resp_callback = resp_callback;
msg->callback_arg = callback_arg;
#ifdef GPE_IPC_TIMERS
msg->begin_time = 0;
msg->end_time = 0;
#endif
}
///////////////////////////////////////////////////////////////////////////////
/// Initialize an IPC message queue.
///
void ipc_init_msgq(ipc_msgq_t* msgq)
{
KERN_DEQUE_SENTINEL_CREATE(&msgq->msg_head);
//set the initial count to 0 with no max count
KERN_SEMAPHORE_CREATE(&msgq->msg_sem, 0, 0);
}
///////////////////////////////////////////////////////////////////////////////
/// Initialize an IPC message and associate it with an IPC message queue
///
void ipc_init_msgq_msg(ipc_msg_t* msg, uint32_t func_id, ipc_msgq_t* msgq)
{
ipc_init_msg(msg, func_id, ipc_msgq_handler, msgq);
}
///////////////////////////////////////////////////////////////////////////////
/// Initialize an IPC ping command message
///
#ifdef IPC_ENABLE_PING
int ipc_ping_cmd_init(ipc_ping_cmd_t* ping_cmd)
{
int rc;
do
{
//initialize the message
ipc_init_msg(&ping_cmd->msg, IPC_MT_PING, ipc_ping_response, 0);
//initialize the semaphore count to 0 and set the max count to 1
rc = KERN_SEMAPHORE_CREATE(&ping_cmd->sem, 0, 1);
if(rc)
{
break;
}
}
while(0);
return rc;
}
#endif /*IPC_ENABLE_PING*/
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