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#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);
}