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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/lib/occlib/ipc_ping.c $ */
/* */
/* OpenPOWER OnChipController Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015 */
/* [+] 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 */
#include "ipc_ping.h"
#ifdef IPC_ENABLE_PING
//server side ping message handler
void ipc_ping_handler(ipc_msg_t* cmd, void* arg)
{
//NOTE: this will run in a critical interrupt when sent to the 405
//ignore return codes
ipc_send_rsp(cmd, IPC_RC_SUCCESS);
}
//Note: This runs in a critical interrupt on the 405 but SSX functions
// can not be called from a critical interrupt. Instead, it must be
// deferred to a non-critical handler.
void ipc_ping_response(ipc_msg_t* rsp, void* arg)
{
ipc_ping_cmd_t *ping_cmd = (ipc_ping_cmd_t*)rsp;
if(KERN_CONTEXT_CRITICAL_INTERRUPT())
{
//NOTE: this is a no-op on PPE
IPC_DEFER_TO_NONCRITICAL(rsp);
}
else
{
KERN_SEMAPHORE_POST(&ping_cmd->sem);
ipc_free_msg(&ping_cmd->msg);
}
}
//Command that can be run in a thread context to ping another target
//The message is allocated on the stack
int ipc_ping(ipc_ping_cmd_t* ping_cmd, uint32_t target_id)
{
int rc;
do
{
//set the target (since this is a multi-target command)
rc = ipc_set_cmd_target(&ping_cmd->msg, target_id);
if(rc)
{
break;
}
//send the command
rc = ipc_send_cmd(&ping_cmd->msg);
if(rc)
{
break;
}
//assume that if we timed out then the target must have gone down.
rc = KERN_SEMAPHORE_PEND(&ping_cmd->sem, KERN_SECONDS(1));
if(rc)
{
if(rc == -KERN_SEMAPHORE_PEND_TIMED_OUT)
{
rc = IPC_RC_TIMEOUT;
}
break;
}
//response message was received. Now return the ipc_rc
rc = ipc_get_rc(&ping_cmd->msg);
}while(0);
return rc;
}
#endif /*IPC_ENABLE_PING*/
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