arch/arm/plat-feroceon/mv_hal/cesa/mvCesaIf.c - kernel/prism - Git at Google

 /*******************************************************************************
 Copyright (C) Marvell International Ltd. and its affiliates

 This software file (the "File") is owned and distributed by Marvell
 International Ltd. and/or its affiliates ("Marvell") under the following
 alternative licensing terms.  Once you have made an election to distribute the
 File under one of the following license alternatives, please (i) delete this
 introductory statement regarding license alternatives, (ii) delete the two
 license alternatives that you have not elected to use and (iii) preserve the
 Marvell copyright notice above.

 ********************************************************************************
 Marvell Commercial License Option

 If you received this File from Marvell and you have entered into a commercial
 license agreement (a "Commercial License") with Marvell, the File is licensed
 to you under the terms of the applicable Commercial License.

 ********************************************************************************
 Marvell GPL License Option

 If you received this File from Marvell, you may opt to use, redistribute and/or
 modify this File in accordance with the terms and conditions of the General
 Public License Version 2, June 1991 (the "GPL License"), a copy of which is
 available along with the File in the license.txt file or by writing to the Free
 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
 on the worldwide web at http://www.gnu.org/licenses/gpl.txt.

 THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
 WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
 DISCLAIMED.  The GPL License provides additional details about this warranty
 disclaimer.
 ********************************************************************************
 Marvell BSD License Option

 If you received this File from Marvell, you may opt to use, redistribute and/or
 modify this File under the following licensing terms.
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:

     *   Redistributions of source code must retain the above copyright notice,
 	this list of conditions and the following disclaimer.

     *   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.

     *   Neither the name of Marvell nor the names of its contributors may be
 	used to endorse or promote products derived from this software without
 	specific prior written permission.

 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.

 *******************************************************************************/

 #include "mvCommon.h"
 #include "mvOs.h"
 #include "mvCesaIf.h"

 #define MV_CESA_IF_MAX_WEIGHT	0xFFFFFFFF

 /* Globals */
 MV_CESA_FLOW_TYPE chanFlowType[MV_CESA_CHANNELS];
 MV_U32 chanWeight[MV_CESA_CHANNELS];
 MV_STATUS readyStatus[MV_CESA_CHANNELS];
 MV_CESA_RESULT **pResQueue;
 MV_CESA_RESULT *resQueue;
 MV_CESA_RESULT *pResEmpty;
 MV_CESA_RESULT *pCurrResult;
 MV_CESA_POLICY currCesaPolicy;
 MV_U8 splitChanId;
 MV_U32 resQueueDepth;
 MV_U32 gReqId;
 MV_U32 currResId;

 MV_STATUS mvCesaIfHalInit(int numOfSession, int queueDepth, void *osHandle, MV_CESA_HAL_DATA *halData)
 {
 	/* Initialize globals */
 	currCesaPolicy = CESA_NULL_POLICY;
 	splitChanId = 0;
 	gReqId = 0;
 	currResId = 0;
 	pCurrResult = NULL;
 	resQueueDepth = queueDepth;

 	/* Allocate reordered results queue */
 	resQueue = (MV_CESA_RESULT *)mvOsMalloc(resQueueDepth * sizeof(MV_CESA_RESULT));
 	if (resQueue == NULL) {
 		mvOsPrintf("%s: Error, resQueue malloc failed\n", __func__);
 		return MV_ERROR;
 	}

 	/* Allocate pointers queue to reordered results queue */
 	pResQueue = (MV_CESA_RESULT **)mvOsMalloc(resQueueDepth * sizeof(MV_CESA_RESULT*));
 	if (pResQueue == NULL) {
 		mvOsPrintf("%s: Error, pResQueue malloc failed\n", __func__);
 		return MV_ERROR;
 	}

 	pResEmpty = &resQueue[0];
 	memset(chanWeight, 0, (MV_CESA_CHANNELS * sizeof(MV_U32)));
 	memset(chanFlowType, 0, (MV_CESA_CHANNELS * sizeof(MV_CESA_FLOW_TYPE)));
 	memset(pResQueue, 0, (resQueueDepth * sizeof(MV_CESA_RESULT *)));
 	memset(resQueue, 0, (resQueueDepth * sizeof(MV_CESA_RESULT)));
 	memset(readyStatus, MV_TRUE, (MV_CESA_CHANNELS * sizeof(MV_STATUS)));

 	return mvCesaHalInit(numOfSession, queueDepth, osHandle, halData);
 }

 MV_STATUS mvCesaIfTdmaWinInit(MV_U8 chan, MV_UNIT_WIN_INFO *addrWinMap)
 {
 	return mvCesaTdmaWinInit(chan, addrWinMap);
 }

 MV_STATUS mvCesaIfFinish(void)
 {
 	/* Free resources */
 	mvOsFree(pResQueue);
 	mvOsFree(resQueue);

 	return mvCesaFinish();
 }

 MV_STATUS mvCesaIfSessionOpen(MV_CESA_OPEN_SESSION *pSession, short *pSid)
 {
 	return mvCesaSessionOpen(pSession, pSid);
 }

 MV_STATUS mvCesaIfSessionClose(short sid)
 {
 	return mvCesaSessionClose(sid);
 }

 MV_STATUS mvCesaIfAction(MV_CESA_COMMAND *pCmd)
 {
 	MV_U8 chan = 0, chanId = 0;
 	MV_U32 min = MV_CESA_IF_MAX_WEIGHT; /* max possible value */
 	MV_U32 freeReqCount = 0;
 	MV_STATUS status;

 	/* Any room for the request ? */
 	for (chan = 0; chan < MV_CESA_CHANNELS; chan++)
 		freeReqCount += cesaReqResources[chan];

 	if (freeReqCount == 0)
 		return MV_NO_RESOURCE;

 	switch (currCesaPolicy) {
 	case CESA_WEIGHTED_CHAN_POLICY:
 	case CESA_NULL_POLICY:
 		for (chan = 0; chan < MV_CESA_CHANNELS; chan++) {
 			if ((cesaReqResources[chan] > 0) && (chanWeight[chan] < min)) {
 				min = chanWeight[chan];
 				chanId = chan;
 			}
 		}
 		chanWeight[chanId] += pCmd->pSrc->mbufSize;
 		break;

 	case CESA_FLOW_ASSOC_CHAN_POLICY:
 		/* TBD - handle policy */
 		break;

 	case CESA_SINGLE_CHAN_POLICY:
 		break;

 	default:
 		mvOsPrintf("%s: Error, policy not supported\n", __func__);
 		return MV_ERROR;
 	}

 	/* Check if we need to handle SPLIT case */
 	if (pCmd->split != MV_CESA_SPLIT_NONE) {
 		if (pCmd->split == MV_CESA_SPLIT_FIRST)
 			splitChanId = chanId;
 		else	/* MV_CESA_SPLIT_SECOND */
 			chanId = splitChanId;
 	}

 	pCmd->reqId = gReqId;

 	status = mvCesaAction(chanId, pCmd);
 	if ((status == MV_OK) || (status == MV_NO_MORE))
 		gReqId = ((gReqId + 1) % resQueueDepth);

 	return status;
 }

 MV_STATUS mvCesaIfReadyGet(MV_U8 chan, MV_CESA_RESULT *pResult)
 {
 	MV_STATUS status;

 	while (MV_TRUE) {

 		if (readyStatus[chan] == MV_FALSE)
 			break;

 		/* Get next result */
 		status = mvCesaReadyGet(chan, pResEmpty);
 		if (status != MV_OK)
 			break;

 		switch (currCesaPolicy) {
 		case CESA_WEIGHTED_CHAN_POLICY:
 		case CESA_NULL_POLICY:
 			chanWeight[chan] -= pResEmpty->mbufSize;
 			break;

 		case CESA_FLOW_ASSOC_CHAN_POLICY:
 			/* TBD - handle policy */
 			break;

 		case CESA_SINGLE_CHAN_POLICY:
 			break;

 		default:
 			mvOsPrintf("%s: Error, policy not supported\n", __func__);
 			return MV_ERROR;
 		}

 		if (pResQueue[pResEmpty->reqId] != NULL)
 			mvOsPrintf("%s: Warning, result entry was overrided(reqId=%d)\n", __func__, pResEmpty->reqId);

 		pResQueue[pResEmpty->reqId] = pResEmpty;
 		pResEmpty = ((pResEmpty != &resQueue[resQueueDepth-1]) ? (pResEmpty + 1) : &resQueue[0]);
 #ifndef MV_CESA_CHAIN_MODE
 		break;
 #endif
 	}

 	pCurrResult = pResQueue[currResId];

 	if (pCurrResult == NULL) {
 		readyStatus[chan] = MV_TRUE;
 		return MV_NOT_READY;
 	} else {
 		/* Release results in order */
 		readyStatus[chan] = MV_FALSE;
 		/* Fill result data */
 		pResult->retCode = pCurrResult->retCode;
 		pResult->pReqPrv = pCurrResult->pReqPrv;
 		pResult->sessionId = pCurrResult->sessionId;
 		pResult->mbufSize = pCurrResult->mbufSize;
 		pResult->reqId = pCurrResult->reqId;
 		pResQueue[currResId] = NULL;
 		currResId = ((currResId + 1) % resQueueDepth);
 		return MV_OK;
 	}
 }

 MV_STATUS mvCesaIfPolicySet(MV_CESA_POLICY cesaPolicy, MV_CESA_FLOW_TYPE flowType)
 {
 	MV_U8 chan = 0;

 	if (currCesaPolicy == CESA_NULL_POLICY) {
 		currCesaPolicy = cesaPolicy;
 	} else {
 		/* Check if more than 1 policy was assigned */
 		if (currCesaPolicy != cesaPolicy) {
 			mvOsPrintf("%s: Error, can not support multiple policies\n", __func__);
 			return MV_ERROR;
 		}
 	}

 	if (cesaPolicy == CESA_FLOW_ASSOC_CHAN_POLICY) {

 		if (flowType == CESA_NULL_FLOW_TYPE) {
 			mvOsPrintf("%s: Error, bad policy configuration\n", __func__);
 			return MV_ERROR;
 		}

 		/* Find next empty entry */
 		for (chan = 0; chan < MV_CESA_CHANNELS; chan++) {
 			if (chanFlowType[chan] == CESA_NULL_FLOW_TYPE)
 				chanFlowType[chan] = flowType;
 		}

 		if (chan == MV_CESA_CHANNELS) {
 			mvOsPrintf("%s: Error, no empty entry is available\n", __func__);
 			return MV_ERROR;
 		}

 	}

 	return MV_OK;
 }

 MV_STATUS mvCesaIfPolicyGet(MV_CESA_POLICY *pCesaPolicy)
 {
 	*pCesaPolicy = currCesaPolicy;

 	return MV_OK;
 }

 MV_VOID mvCesaIfDebugMbuf(const char *str, MV_CESA_MBUF *pMbuf, int offset, int size)
 {
 	return mvCesaDebugMbuf(str, pMbuf, offset, size);
 }
	/*******************************************************************************
	Copyright (C) Marvell International Ltd. and its affiliates

	This software file (the "File") is owned and distributed by Marvell
	International Ltd. and/or its affiliates ("Marvell") under the following
	alternative licensing terms. Once you have made an election to distribute the
	File under one of the following license alternatives, please (i) delete this
	introductory statement regarding license alternatives, (ii) delete the two
	license alternatives that you have not elected to use and (iii) preserve the
	Marvell copyright notice above.

	********************************************************************************
	Marvell Commercial License Option

	If you received this File from Marvell and you have entered into a commercial
	license agreement (a "Commercial License") with Marvell, the File is licensed
	to you under the terms of the applicable Commercial License.

	********************************************************************************
	Marvell GPL License Option

	If you received this File from Marvell, you may opt to use, redistribute and/or
	modify this File in accordance with the terms and conditions of the General
	Public License Version 2, June 1991 (the "GPL License"), a copy of which is
	available along with the File in the license.txt file or by writing to the Free
	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
	on the worldwide web at http://www.gnu.org/licenses/gpl.txt.

	THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
	WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
	DISCLAIMED. The GPL License provides additional details about this warranty
	disclaimer.
	********************************************************************************
	Marvell BSD License Option

	If you received this File from Marvell, you may opt to use, redistribute and/or
	modify this File under the following licensing terms.
	Redistribution and use in source and binary forms, with or without modification,
	are permitted provided that the following conditions are met:

	* Redistributions of source code must retain the above copyright notice,
	this list of conditions and the following disclaimer.

	* 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.

	* Neither the name of Marvell nor the names of its contributors may be
	used to endorse or promote products derived from this software without
	specific prior written permission.

	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.

	*******************************************************************************/

	#include "mvCommon.h"
	#include "mvOs.h"
	#include "mvCesaIf.h"

	#define MV_CESA_IF_MAX_WEIGHT 0xFFFFFFFF

	/* Globals */
	MV_CESA_FLOW_TYPE chanFlowType[MV_CESA_CHANNELS];
	MV_U32 chanWeight[MV_CESA_CHANNELS];
	MV_STATUS readyStatus[MV_CESA_CHANNELS];
	MV_CESA_RESULT **pResQueue;
	MV_CESA_RESULT *resQueue;
	MV_CESA_RESULT *pResEmpty;
	MV_CESA_RESULT *pCurrResult;
	MV_CESA_POLICY currCesaPolicy;
	MV_U8 splitChanId;
	MV_U32 resQueueDepth;
	MV_U32 gReqId;
	MV_U32 currResId;

	MV_STATUS mvCesaIfHalInit(int numOfSession, int queueDepth, void osHandle, MV_CESA_HAL_DATA halData)
	{
	/* Initialize globals */
	currCesaPolicy = CESA_NULL_POLICY;
	splitChanId = 0;
	gReqId = 0;
	currResId = 0;
	pCurrResult = NULL;
	resQueueDepth = queueDepth;

	/* Allocate reordered results queue */
	resQueue = (MV_CESA_RESULT )mvOsMalloc(resQueueDepth sizeof(MV_CESA_RESULT));
	if (resQueue == NULL) {
	mvOsPrintf("%s: Error, resQueue malloc failed\n", __func__);
	return MV_ERROR;
	}

	/* Allocate pointers queue to reordered results queue */
	pResQueue = (MV_CESA_RESULT *)mvOsMalloc(resQueueDepth sizeof(MV_CESA_RESULT*));
	if (pResQueue == NULL) {
	mvOsPrintf("%s: Error, pResQueue malloc failed\n", __func__);
	return MV_ERROR;
	}

	pResEmpty = &resQueue[0];
	memset(chanWeight, 0, (MV_CESA_CHANNELS * sizeof(MV_U32)));
	memset(chanFlowType, 0, (MV_CESA_CHANNELS * sizeof(MV_CESA_FLOW_TYPE)));
	memset(pResQueue, 0, (resQueueDepth * sizeof(MV_CESA_RESULT *)));
	memset(resQueue, 0, (resQueueDepth * sizeof(MV_CESA_RESULT)));
	memset(readyStatus, MV_TRUE, (MV_CESA_CHANNELS * sizeof(MV_STATUS)));

	return mvCesaHalInit(numOfSession, queueDepth, osHandle, halData);
	}

	MV_STATUS mvCesaIfTdmaWinInit(MV_U8 chan, MV_UNIT_WIN_INFO *addrWinMap)
	{
	return mvCesaTdmaWinInit(chan, addrWinMap);
	}

	MV_STATUS mvCesaIfFinish(void)
	{
	/* Free resources */
	mvOsFree(pResQueue);
	mvOsFree(resQueue);

	return mvCesaFinish();
	}

	MV_STATUS mvCesaIfSessionOpen(MV_CESA_OPEN_SESSION pSession, short pSid)
	{
	return mvCesaSessionOpen(pSession, pSid);
	}

	MV_STATUS mvCesaIfSessionClose(short sid)
	{
	return mvCesaSessionClose(sid);
	}

	MV_STATUS mvCesaIfAction(MV_CESA_COMMAND *pCmd)
	{
	MV_U8 chan = 0, chanId = 0;
	MV_U32 min = MV_CESA_IF_MAX_WEIGHT; /* max possible value */
	MV_U32 freeReqCount = 0;
	MV_STATUS status;

	/* Any room for the request ? */
	for (chan = 0; chan < MV_CESA_CHANNELS; chan++)
	freeReqCount += cesaReqResources[chan];

	if (freeReqCount == 0)
	return MV_NO_RESOURCE;

	switch (currCesaPolicy) {
	case CESA_WEIGHTED_CHAN_POLICY:
	case CESA_NULL_POLICY:
	for (chan = 0; chan < MV_CESA_CHANNELS; chan++) {
	if ((cesaReqResources[chan] > 0) && (chanWeight[chan] < min)) {
	min = chanWeight[chan];
	chanId = chan;
	}
	}
	chanWeight[chanId] += pCmd->pSrc->mbufSize;
	break;

	case CESA_FLOW_ASSOC_CHAN_POLICY:
	/* TBD - handle policy */
	break;

	case CESA_SINGLE_CHAN_POLICY:
	break;

	default:
	mvOsPrintf("%s: Error, policy not supported\n", __func__);
	return MV_ERROR;
	}

	/* Check if we need to handle SPLIT case */
	if (pCmd->split != MV_CESA_SPLIT_NONE) {
	if (pCmd->split == MV_CESA_SPLIT_FIRST)
	splitChanId = chanId;
	else /* MV_CESA_SPLIT_SECOND */
	chanId = splitChanId;
	}

	pCmd->reqId = gReqId;

	status = mvCesaAction(chanId, pCmd);
	if ((status == MV_OK) \|\| (status == MV_NO_MORE))
	gReqId = ((gReqId + 1) % resQueueDepth);

	return status;
	}

	MV_STATUS mvCesaIfReadyGet(MV_U8 chan, MV_CESA_RESULT *pResult)
	{
	MV_STATUS status;

	while (MV_TRUE) {

	if (readyStatus[chan] == MV_FALSE)
	break;

	/* Get next result */
	status = mvCesaReadyGet(chan, pResEmpty);
	if (status != MV_OK)
	break;

	switch (currCesaPolicy) {
	case CESA_WEIGHTED_CHAN_POLICY:
	case CESA_NULL_POLICY:
	chanWeight[chan] -= pResEmpty->mbufSize;
	break;

	case CESA_FLOW_ASSOC_CHAN_POLICY:
	/* TBD - handle policy */
	break;

	case CESA_SINGLE_CHAN_POLICY:
	break;

	default:
	mvOsPrintf("%s: Error, policy not supported\n", __func__);
	return MV_ERROR;
	}

	if (pResQueue[pResEmpty->reqId] != NULL)
	mvOsPrintf("%s: Warning, result entry was overrided(reqId=%d)\n", __func__, pResEmpty->reqId);

	pResQueue[pResEmpty->reqId] = pResEmpty;
	pResEmpty = ((pResEmpty != &resQueue[resQueueDepth-1]) ? (pResEmpty + 1) : &resQueue[0]);
	#ifndef MV_CESA_CHAIN_MODE
	break;
	#endif
	}

	pCurrResult = pResQueue[currResId];

	if (pCurrResult == NULL) {
	readyStatus[chan] = MV_TRUE;
	return MV_NOT_READY;
	} else {
	/* Release results in order */
	readyStatus[chan] = MV_FALSE;
	/* Fill result data */
	pResult->retCode = pCurrResult->retCode;
	pResult->pReqPrv = pCurrResult->pReqPrv;
	pResult->sessionId = pCurrResult->sessionId;
	pResult->mbufSize = pCurrResult->mbufSize;
	pResult->reqId = pCurrResult->reqId;
	pResQueue[currResId] = NULL;
	currResId = ((currResId + 1) % resQueueDepth);
	return MV_OK;
	}
	}

	MV_STATUS mvCesaIfPolicySet(MV_CESA_POLICY cesaPolicy, MV_CESA_FLOW_TYPE flowType)
	{
	MV_U8 chan = 0;

	if (currCesaPolicy == CESA_NULL_POLICY) {
	currCesaPolicy = cesaPolicy;
	} else {
	/* Check if more than 1 policy was assigned */
	if (currCesaPolicy != cesaPolicy) {
	mvOsPrintf("%s: Error, can not support multiple policies\n", __func__);
	return MV_ERROR;
	}
	}

	if (cesaPolicy == CESA_FLOW_ASSOC_CHAN_POLICY) {

	if (flowType == CESA_NULL_FLOW_TYPE) {
	mvOsPrintf("%s: Error, bad policy configuration\n", __func__);
	return MV_ERROR;
	}

	/* Find next empty entry */
	for (chan = 0; chan < MV_CESA_CHANNELS; chan++) {
	if (chanFlowType[chan] == CESA_NULL_FLOW_TYPE)
	chanFlowType[chan] = flowType;
	}

	if (chan == MV_CESA_CHANNELS) {
	mvOsPrintf("%s: Error, no empty entry is available\n", __func__);
	return MV_ERROR;
	}

	}

	return MV_OK;
	}

	MV_STATUS mvCesaIfPolicyGet(MV_CESA_POLICY *pCesaPolicy)
	{
	*pCesaPolicy = currCesaPolicy;

	return MV_OK;
	}

	MV_VOID mvCesaIfDebugMbuf(const char str, MV_CESA_MBUF pMbuf, int offset, int size)
	{
	return mvCesaDebugMbuf(str, pMbuf, offset, size);
	}