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/**
* @file IxNpeMhSend.c
*
* @author Intel Corporation
* @date 18 Jan 2002
*
* @brief This file contains the implementation of the private API for the
* Send module.
*
*
* @par
* IXP400 SW Release version 2.0
*
* -- Copyright Notice --
*
* @par
* Copyright 2001-2005, Intel Corporation.
* All rights reserved.
*
* @par
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* @par
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @par
* -- End of Copyright Notice --
*/
/*
* Put the system defined include files required.
*/
/*
* Put the user defined include files required.
*/
#include "IxNpeMhMacros_p.h"
#include "IxNpeMhConfig_p.h"
#include "IxNpeMhSend_p.h"
#include "IxNpeMhSolicitedCbMgr_p.h"
/*
* #defines and macros used in this file.
*/
/**
* @def IX_NPEMH_INFIFO_RETRY_DELAY_US
*
* @brief Amount of time (uSecs) to delay between retries
* while inFIFO is Full when attempting to send a message
*/
#define IX_NPEMH_INFIFO_RETRY_DELAY_US (1)
/*
* Typedefs whose scope is limited to this file.
*/
/**
* @struct IxNpeMhSendStats
*
* @brief This structure is used to maintain statistics for the Send
* module.
*/
typedef struct
{
UINT32 sends; /**< send invocations */
UINT32 sendWithResponses; /**< send with response invocations */
UINT32 queueFulls; /**< fifo queue full occurrences */
UINT32 queueFullRetries; /**< fifo queue full retry occurrences */
UINT32 maxQueueFullRetries; /**< max fifo queue full retries */
UINT32 callbackFulls; /**< callback list full occurrences */
} IxNpeMhSendStats;
/*
* Variable declarations global to this file only. Externs are followed by
* static variables.
*/
PRIVATE IxNpeMhSendStats ixNpeMhSendStats[IX_NPEMH_NUM_NPES];
/*
* Extern function prototypes.
*/
/*
* Static function prototypes.
*/
PRIVATE
BOOL ixNpeMhSendInFifoIsFull(
IxNpeMhNpeId npeId,
UINT32 maxSendRetries);
/*
* Function definition: ixNpeMhSendInFifoIsFull
*/
PRIVATE
BOOL ixNpeMhSendInFifoIsFull(
IxNpeMhNpeId npeId,
UINT32 maxSendRetries)
{
BOOL isFull = FALSE;
UINT32 numRetries = 0;
/* check the NPE's inFIFO */
isFull = ixNpeMhConfigInFifoIsFull (npeId);
/* we retry a few times, just to give the NPE a chance to read from */
/* the FIFO if the FIFO is currently full */
while (isFull && (numRetries++ < maxSendRetries))
{
if (numRetries >= IX_NPEMH_SEND_RETRIES_DEFAULT)
{
/* Delay here for as short a time as possible (1 us). */
/* Adding a delay here should ensure we are not hogging */
/* the AHB bus while we are retrying */
ixOsalBusySleep (IX_NPEMH_INFIFO_RETRY_DELAY_US);
}
/* re-check the NPE's inFIFO */
isFull = ixNpeMhConfigInFifoIsFull (npeId);
/* update statistical info */
ixNpeMhSendStats[npeId].queueFullRetries++;
}
/* record the highest number of retries that occurred */
if (ixNpeMhSendStats[npeId].maxQueueFullRetries < numRetries)
{
ixNpeMhSendStats[npeId].maxQueueFullRetries = numRetries;
}
if (isFull)
{
/* update statistical info */
ixNpeMhSendStats[npeId].queueFulls++;
}
return isFull;
}
/*
* Function definition: ixNpeMhSendMessageSend
*/
IX_STATUS ixNpeMhSendMessageSend (
IxNpeMhNpeId npeId,
IxNpeMhMessage message,
UINT32 maxSendRetries)
{
IX_STATUS status;
IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Entering "
"ixNpeMhSendMessageSend\n");
/* update statistical info */
ixNpeMhSendStats[npeId].sends++;
/* check if the NPE's inFIFO is full - if so return an error */
if (ixNpeMhSendInFifoIsFull (npeId, maxSendRetries))
{
IX_NPEMH_TRACE0 (IX_NPEMH_WARNING, "NPE's inFIFO is full\n");
return IX_FAIL;
}
/* write the message to the NPE's inFIFO */
status = ixNpeMhConfigInFifoWrite (npeId, message);
IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Exiting "
"ixNpeMhSendMessageSend\n");
return status;
}
/*
* Function definition: ixNpeMhSendMessageWithResponseSend
*/
IX_STATUS ixNpeMhSendMessageWithResponseSend (
IxNpeMhNpeId npeId,
IxNpeMhMessage message,
IxNpeMhMessageId solicitedMessageId,
IxNpeMhCallback solicitedCallback,
UINT32 maxSendRetries)
{
IX_STATUS status = IX_SUCCESS;
IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Entering "
"ixNpeMhSendMessageWithResponseSend\n");
/* update statistical info */
ixNpeMhSendStats[npeId].sendWithResponses++;
/* sr: this sleep will call the receive routine (no interrupts used!!!) */
ixOsalSleep (IX_NPEMH_INFIFO_RETRY_DELAY_US);
/* check if the NPE's inFIFO is full - if so return an error */
if (ixNpeMhSendInFifoIsFull (npeId, maxSendRetries))
{
IX_NPEMH_TRACE0 (IX_NPEMH_WARNING, "NPE's inFIFO is full\n");
return IX_FAIL;
}
/* save the solicited callback */
status = ixNpeMhSolicitedCbMgrCallbackSave (
npeId, solicitedMessageId, solicitedCallback);
if (status != IX_SUCCESS)
{
IX_NPEMH_ERROR_REPORT ("Failed to save solicited callback\n");
/* update statistical info */
ixNpeMhSendStats[npeId].callbackFulls++;
return status;
}
/* write the message to the NPE's inFIFO */
status = ixNpeMhConfigInFifoWrite (npeId, message);
IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Exiting "
"ixNpeMhSendMessageWithResponseSend\n");
return status;
}
/*
* Function definition: ixNpeMhSendShow
*/
void ixNpeMhSendShow (
IxNpeMhNpeId npeId)
{
/* show the message send invocation counter */
IX_NPEMH_SHOW ("Send invocations",
ixNpeMhSendStats[npeId].sends);
/* show the message send with response invocation counter */
IX_NPEMH_SHOW ("Send with response invocations",
ixNpeMhSendStats[npeId].sendWithResponses);
/* show the fifo queue full occurrence counter */
IX_NPEMH_SHOW ("Fifo queue full occurrences",
ixNpeMhSendStats[npeId].queueFulls);
/* show the fifo queue full retry occurrence counter */
IX_NPEMH_SHOW ("Fifo queue full retry occurrences",
ixNpeMhSendStats[npeId].queueFullRetries);
/* show the fifo queue full maximum retries counter */
IX_NPEMH_SHOW ("Maximum fifo queue full retries",
ixNpeMhSendStats[npeId].maxQueueFullRetries);
/* show the callback list full occurrence counter */
IX_NPEMH_SHOW ("Solicited callback list full occurrences",
ixNpeMhSendStats[npeId].callbackFulls);
}
/*
* Function definition: ixNpeMhSendShowReset
*/
void ixNpeMhSendShowReset (
IxNpeMhNpeId npeId)
{
/* reset the message send invocation counter */
ixNpeMhSendStats[npeId].sends = 0;
/* reset the message send with response invocation counter */
ixNpeMhSendStats[npeId].sendWithResponses = 0;
/* reset the fifo queue full occurrence counter */
ixNpeMhSendStats[npeId].queueFulls = 0;
/* reset the fifo queue full retry occurrence counter */
ixNpeMhSendStats[npeId].queueFullRetries = 0;
/* reset the max fifo queue full retries counter */
ixNpeMhSendStats[npeId].maxQueueFullRetries = 0;
/* reset the callback list full occurrence counter */
ixNpeMhSendStats[npeId].callbackFulls = 0;
}
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