drivers/staging/bcm/LeakyBucket.c - linux - Git at Google

 /**********************************************************************
 * 			LEAKYBUCKET.C
 *	This file contains the routines related to Leaky Bucket Algorithm.
 ***********************************************************************/
 #include "headers.h"

 /*********************************************************************
 * Function    - UpdateTokenCount()
 *
 * Description - This function calculates the token count for each
 *				channel and updates the same in Adapter strucuture.
 *
 * Parameters  - Adapter: Pointer to the Adapter structure.
 *
 * Returns     - None
 **********************************************************************/

 static VOID UpdateTokenCount(register struct bcm_mini_adapter *Adapter)
 {
 	ULONG liCurrentTime;
 	INT i = 0;
 	struct timeval tv;

 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL,
 			"=====>\n");
 	if (NULL == Adapter) {
 		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS,
 				DBG_LVL_ALL, "Adapter found NULL!\n");
 		return;
 	}

 	do_gettimeofday(&tv);
 	for (i = 0; i < NO_OF_QUEUES; i++) {
 		if (TRUE == Adapter->PackInfo[i].bValid &&
 		    (1 == Adapter->PackInfo[i].ucDirection)) {
 			liCurrentTime = ((tv.tv_sec-
 				Adapter->PackInfo[i].stLastUpdateTokenAt.tv_sec)*1000 +
 				(tv.tv_usec-Adapter->PackInfo[i].stLastUpdateTokenAt.tv_usec)/
 				1000);
 			if (0 != liCurrentTime) {
 				Adapter->PackInfo[i].uiCurrentTokenCount += (ULONG)
 					((Adapter->PackInfo[i].uiMaxAllowedRate) *
 					((ULONG)((liCurrentTime)))/1000);
 				memcpy(&Adapter->PackInfo[i].stLastUpdateTokenAt,
 					&tv, sizeof(struct timeval));
 				Adapter->PackInfo[i].liLastUpdateTokenAt = liCurrentTime;
 				if (Adapter->PackInfo[i].uiCurrentTokenCount >=
 				    Adapter->PackInfo[i].uiMaxBucketSize) {
 					Adapter->PackInfo[i].uiCurrentTokenCount =
 						Adapter->PackInfo[i].uiMaxBucketSize;
 				}
 			}
 		}
 	}
 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "<=====\n");
 	return;

 }


 /*********************************************************************
 * Function    - IsPacketAllowedForFlow()
 *
 * Description - This function checks whether the given packet from the
 *				specified queue can be allowed for transmission by
 *				checking the token count.
 *
 * Parameters  - Adapter	      :	Pointer to the Adpater structure.
 * 			  - iQIndex	      :	The queue Identifier.
 * 			  - ulPacketLength:	Number of bytes to be transmitted.
 *
 * Returns     - The number of bytes allowed for transmission.
 *
 ***********************************************************************/
 static ULONG GetSFTokenCount(struct bcm_mini_adapter *Adapter, struct bcm_packet_info *psSF)
 {
 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IsPacketAllowedForFlow ===>");
 	/* Validate the parameters */
 	if (NULL == Adapter || (psSF < Adapter->PackInfo &&
 	    (uintptr_t)psSF > (uintptr_t) &Adapter->PackInfo[HiPriority])) {
 		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IPAFF: Got wrong Parameters:Adapter: %p, QIndex: %zd\n", Adapter, (psSF-Adapter->PackInfo));
 		return 0;
 	}

 	if (FALSE != psSF->bValid && psSF->ucDirection) {
 		if (0 != psSF->uiCurrentTokenCount) {
 				return psSF->uiCurrentTokenCount;
 		} else {
 			BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "Not enough tokens in queue %zd Available %u\n",
 				psSF-Adapter->PackInfo, psSF->uiCurrentTokenCount);
 			psSF->uiPendedLast = 1;
 		}
 	} else {
 		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IPAFF: Queue %zd not valid\n", psSF-Adapter->PackInfo);
 	}
 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IsPacketAllowedForFlow <===");
 	return 0;
 }

 /**
 @ingroup tx_functions
 This function despatches packet from the specified queue.
 @return Zero(success) or Negative value(failure)
 */
 static INT SendPacketFromQueue(struct bcm_mini_adapter *Adapter,/**<Logical Adapter*/
 			struct bcm_packet_info *psSF, /**<Queue identifier*/
 			       struct sk_buff *Packet)	/**<Pointer to the packet to be sent*/
 {
 	INT Status = STATUS_FAILURE;
 	UINT uiIndex = 0, PktLen = 0;

 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "=====>");
 	if (!Adapter || !Packet || !psSF) {
 		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "Got NULL Adapter or Packet");
 		return -EINVAL;
 	}

 	if (psSF->liDrainCalculated == 0)
 		psSF->liDrainCalculated = jiffies;
 	/* send the packet to the fifo.. */
 	PktLen = Packet->len;
 	Status = SetupNextSend(Adapter, Packet, psSF->usVCID_Value);
 	if (Status == 0) {
 		for (uiIndex = 0; uiIndex < MIBS_MAX_HIST_ENTRIES; uiIndex++) {
 			if ((PktLen <= MIBS_PKTSIZEHIST_RANGE*(uiIndex+1)) && (PktLen > MIBS_PKTSIZEHIST_RANGE*(uiIndex)))
 				Adapter->aTxPktSizeHist[uiIndex]++;
 		}
 	}
 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "<=====");
 	return Status;
 }

 /************************************************************************
 * Function    - CheckAndSendPacketFromIndex()
 *
 * Description - This function dequeues the data/control packet from the
 *				specified queue for transmission.
 *
 * Parameters  - Adapter : Pointer to the driver control structure.
 * 			  - iQIndex : The queue Identifier.
 *
 * Returns     - None.
 *
 ****************************************************************************/
 static VOID CheckAndSendPacketFromIndex(struct bcm_mini_adapter *Adapter, struct bcm_packet_info *psSF)
 {
 	struct sk_buff *QueuePacket = NULL;
 	char *pControlPacket = NULL;
 	INT Status = 0;
 	int iPacketLen = 0;


 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "%zd ====>", (psSF-Adapter->PackInfo));
 	if ((psSF != &Adapter->PackInfo[HiPriority]) && Adapter->LinkUpStatus && atomic_read(&psSF->uiPerSFTxResourceCount)) { /* Get data packet */
 		if (!psSF->ucDirection)
 			return;

 		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "UpdateTokenCount ");
 		if (Adapter->IdleMode || Adapter->bPreparingForLowPowerMode)
 			return;	/* in idle mode */

 		/* Check for Free Descriptors */
 		if (atomic_read(&Adapter->CurrNumFreeTxDesc) <= MINIMUM_PENDING_DESCRIPTORS) {
 			BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, " No Free Tx Descriptor(%d) is available for Data pkt..", atomic_read(&Adapter->CurrNumFreeTxDesc));
 			return;
 		}

 		spin_lock_bh(&psSF->SFQueueLock);
 		QueuePacket = psSF->FirstTxQueue;

 		if (QueuePacket) {
 			BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Dequeuing Data Packet");

 			if (psSF->bEthCSSupport)
 				iPacketLen = QueuePacket->len;
 			else
 				iPacketLen = QueuePacket->len-ETH_HLEN;

 			iPacketLen <<= 3;
 			if (iPacketLen <= GetSFTokenCount(Adapter, psSF)) {
 				BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Allowed bytes %d",
 					(iPacketLen >> 3));

 				DEQUEUEPACKET(psSF->FirstTxQueue, psSF->LastTxQueue);
 				psSF->uiCurrentBytesOnHost -= (QueuePacket->len);
 				psSF->uiCurrentPacketsOnHost--;
 				atomic_dec(&Adapter->TotalPacketCount);
 				spin_unlock_bh(&psSF->SFQueueLock);

 				Status = SendPacketFromQueue(Adapter, psSF, QueuePacket);
 				psSF->uiPendedLast = FALSE;
 			} else {
 				BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "For Queue: %zd\n", psSF-Adapter->PackInfo);
 				BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nAvailable Tokens = %d required = %d\n",
 					psSF->uiCurrentTokenCount, iPacketLen);
 				/*
 				this part indicates that because of non-availability of the tokens
 				pkt has not been send out hence setting the pending flag indicating the host to send it out
 				first next iteration.
 				*/
 				psSF->uiPendedLast = TRUE;
 				spin_unlock_bh(&psSF->SFQueueLock);
 			}
 		} else {
 			spin_unlock_bh(&psSF->SFQueueLock);
 		}
 	} else {

 		if ((atomic_read(&Adapter->CurrNumFreeTxDesc) > 0) &&
 		    (atomic_read(&Adapter->index_rd_txcntrlpkt) !=
 		     atomic_read(&Adapter->index_wr_txcntrlpkt))) {
 			pControlPacket = Adapter->txctlpacket
 			[(atomic_read(&Adapter->index_rd_txcntrlpkt)%MAX_CNTRL_PKTS)];
 			if (pControlPacket) {
 				BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Sending Control packet");
 				Status = SendControlPacket(Adapter, pControlPacket);
 				if (STATUS_SUCCESS == Status) {
 					spin_lock_bh(&psSF->SFQueueLock);
 					psSF->NumOfPacketsSent++;
 					psSF->uiSentBytes += ((struct bcm_leader *)pControlPacket)->PLength;
 					psSF->uiSentPackets++;
 					atomic_dec(&Adapter->TotalPacketCount);
 					psSF->uiCurrentBytesOnHost -= ((struct bcm_leader *)pControlPacket)->PLength;
 					psSF->uiCurrentPacketsOnHost--;
 					atomic_inc(&Adapter->index_rd_txcntrlpkt);
 					spin_unlock_bh(&psSF->SFQueueLock);
 				} else {
 					BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "SendControlPacket Failed\n");
 				}
 			} else {
 					BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, " Control Pkt is not available, Indexing is wrong....");
 			}
 		}
 	}
 }


 /*******************************************************************
 * Function    - transmit_packets()
 *
 * Description - This function transmits the packets from different
 *				queues, if free descriptors are available on target.
 *
 * Parameters  - Adapter:  Pointer to the Adapter structure.
 *
 * Returns     - None.
 ********************************************************************/
 VOID transmit_packets(struct bcm_mini_adapter *Adapter)
 {
 	UINT uiPrevTotalCount = 0;
 	int iIndex = 0;

 	BOOLEAN exit_flag = TRUE;

 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "=====>");

 	if (NULL == Adapter) {
 		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Got NULL Adapter");
 		return;
 	}
 	if (Adapter->device_removed == TRUE) {
 		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Device removed");
 		return;
 	}

 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nUpdateTokenCount ====>\n");

 	UpdateTokenCount(Adapter);

 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nPruneQueueAllSF ====>\n");

 	PruneQueueAllSF(Adapter);

 	uiPrevTotalCount = atomic_read(&Adapter->TotalPacketCount);

 	for (iIndex = HiPriority; iIndex >= 0; iIndex--) {
 		if (!uiPrevTotalCount || (TRUE == Adapter->device_removed))
 				break;

 		if (Adapter->PackInfo[iIndex].bValid &&
 		    Adapter->PackInfo[iIndex].uiPendedLast &&
 		    Adapter->PackInfo[iIndex].uiCurrentBytesOnHost) {
 			BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Calling CheckAndSendPacketFromIndex..");
 			CheckAndSendPacketFromIndex(Adapter, &Adapter->PackInfo[iIndex]);
 			uiPrevTotalCount--;
 		}
 	}

 	while (uiPrevTotalCount > 0 && !Adapter->device_removed) {
 		exit_flag = TRUE;
 		/* second iteration to parse non-pending queues */
 		for (iIndex = HiPriority; iIndex >= 0; iIndex--) {
 			if (!uiPrevTotalCount || (TRUE == Adapter->device_removed))
 				break;

 			if (Adapter->PackInfo[iIndex].bValid &&
 			    Adapter->PackInfo[iIndex].uiCurrentBytesOnHost &&
 			    !Adapter->PackInfo[iIndex].uiPendedLast) {
 				BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Calling CheckAndSendPacketFromIndex..");
 				CheckAndSendPacketFromIndex(Adapter, &Adapter->PackInfo[iIndex]);
 				uiPrevTotalCount--;
 				exit_flag = FALSE;
 			}
 		}

 		if (Adapter->IdleMode || Adapter->bPreparingForLowPowerMode) {
 			BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "In Idle Mode\n");
 			break;
 		}
 		if (exit_flag == TRUE)
 			break;
 	} /* end of inner while loop */

 	update_per_cid_rx(Adapter);
 	Adapter->txtransmit_running = 0;
 	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "<======");
 }
	/**********************************************************************
	* LEAKYBUCKET.C
	* This file contains the routines related to Leaky Bucket Algorithm.
	***********************************************************************/
	#include "headers.h"

	/*********************************************************************
	* Function - UpdateTokenCount()
	*
	* Description - This function calculates the token count for each
	* channel and updates the same in Adapter strucuture.
	*
	* Parameters - Adapter: Pointer to the Adapter structure.
	*
	* Returns - None
	**********************************************************************/

	static VOID UpdateTokenCount(register struct bcm_mini_adapter *Adapter)
	{
	ULONG liCurrentTime;
	INT i = 0;
	struct timeval tv;

	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL,
	"=====>\n");
	if (NULL == Adapter) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS,
	DBG_LVL_ALL, "Adapter found NULL!\n");
	return;
	}

	do_gettimeofday(&tv);
	for (i = 0; i < NO_OF_QUEUES; i++) {
	if (TRUE == Adapter->PackInfo[i].bValid &&
	(1 == Adapter->PackInfo[i].ucDirection)) {
	liCurrentTime = ((tv.tv_sec-
	Adapter->PackInfo[i].stLastUpdateTokenAt.tv_sec)*1000 +
	(tv.tv_usec-Adapter->PackInfo[i].stLastUpdateTokenAt.tv_usec)/
	1000);
	if (0 != liCurrentTime) {
	Adapter->PackInfo[i].uiCurrentTokenCount += (ULONG)
	((Adapter->PackInfo[i].uiMaxAllowedRate) *
	((ULONG)((liCurrentTime)))/1000);
	memcpy(&Adapter->PackInfo[i].stLastUpdateTokenAt,
	&tv, sizeof(struct timeval));
	Adapter->PackInfo[i].liLastUpdateTokenAt = liCurrentTime;
	if (Adapter->PackInfo[i].uiCurrentTokenCount >=
	Adapter->PackInfo[i].uiMaxBucketSize) {
	Adapter->PackInfo[i].uiCurrentTokenCount =
	Adapter->PackInfo[i].uiMaxBucketSize;
	}
	}
	}
	}
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "<=====\n");
	return;

	}


	/*********************************************************************
	* Function - IsPacketAllowedForFlow()
	*
	* Description - This function checks whether the given packet from the
	* specified queue can be allowed for transmission by
	* checking the token count.
	*
	* Parameters - Adapter : Pointer to the Adpater structure.
	* - iQIndex : The queue Identifier.
	* - ulPacketLength: Number of bytes to be transmitted.
	*
	* Returns - The number of bytes allowed for transmission.
	*
	***********************************************************************/
	static ULONG GetSFTokenCount(struct bcm_mini_adapter Adapter, struct bcm_packet_info psSF)
	{
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IsPacketAllowedForFlow ===>");
	/* Validate the parameters */
	if (NULL == Adapter \|\| (psSF < Adapter->PackInfo &&
	(uintptr_t)psSF > (uintptr_t) &Adapter->PackInfo[HiPriority])) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IPAFF: Got wrong Parameters:Adapter: %p, QIndex: %zd\n", Adapter, (psSF-Adapter->PackInfo));
	return 0;
	}

	if (FALSE != psSF->bValid && psSF->ucDirection) {
	if (0 != psSF->uiCurrentTokenCount) {
	return psSF->uiCurrentTokenCount;
	} else {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "Not enough tokens in queue %zd Available %u\n",
	psSF-Adapter->PackInfo, psSF->uiCurrentTokenCount);
	psSF->uiPendedLast = 1;
	}
	} else {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IPAFF: Queue %zd not valid\n", psSF-Adapter->PackInfo);
	}
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IsPacketAllowedForFlow <===");
	return 0;
	}

	/**
	@ingroup tx_functions
	This function despatches packet from the specified queue.
	@return Zero(success) or Negative value(failure)
	*/
	static INT SendPacketFromQueue(struct bcm_mini_adapter Adapter,/<Logical Adapter/
	struct bcm_packet_info psSF, /<Queue identifier/
	struct sk_buff Packet) /<Pointer to the packet to be sent/
	{
	INT Status = STATUS_FAILURE;
	UINT uiIndex = 0, PktLen = 0;

	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "=====>");
	if (!Adapter \|\| !Packet \|\| !psSF) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "Got NULL Adapter or Packet");
	return -EINVAL;
	}

	if (psSF->liDrainCalculated == 0)
	psSF->liDrainCalculated = jiffies;
	/* send the packet to the fifo.. */
	PktLen = Packet->len;
	Status = SetupNextSend(Adapter, Packet, psSF->usVCID_Value);
	if (Status == 0) {
	for (uiIndex = 0; uiIndex < MIBS_MAX_HIST_ENTRIES; uiIndex++) {
	if ((PktLen <= MIBS_PKTSIZEHIST_RANGE(uiIndex+1)) && (PktLen > MIBS_PKTSIZEHIST_RANGE(uiIndex)))
	Adapter->aTxPktSizeHist[uiIndex]++;
	}
	}
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "<=====");
	return Status;
	}

	/************************************************************************
	* Function - CheckAndSendPacketFromIndex()
	*
	* Description - This function dequeues the data/control packet from the
	* specified queue for transmission.
	*
	* Parameters - Adapter : Pointer to the driver control structure.
	* - iQIndex : The queue Identifier.
	*
	* Returns - None.
	*
	****************************************************************************/
	static VOID CheckAndSendPacketFromIndex(struct bcm_mini_adapter Adapter, struct bcm_packet_info psSF)
	{
	struct sk_buff *QueuePacket = NULL;
	char *pControlPacket = NULL;
	INT Status = 0;
	int iPacketLen = 0;


	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "%zd ====>", (psSF-Adapter->PackInfo));
	if ((psSF != &Adapter->PackInfo[HiPriority]) && Adapter->LinkUpStatus && atomic_read(&psSF->uiPerSFTxResourceCount)) { /* Get data packet */
	if (!psSF->ucDirection)
	return;

	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "UpdateTokenCount ");
	if (Adapter->IdleMode \|\| Adapter->bPreparingForLowPowerMode)
	return; /* in idle mode */

	/* Check for Free Descriptors */
	if (atomic_read(&Adapter->CurrNumFreeTxDesc) <= MINIMUM_PENDING_DESCRIPTORS) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, " No Free Tx Descriptor(%d) is available for Data pkt..", atomic_read(&Adapter->CurrNumFreeTxDesc));
	return;
	}

	spin_lock_bh(&psSF->SFQueueLock);
	QueuePacket = psSF->FirstTxQueue;

	if (QueuePacket) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Dequeuing Data Packet");

	if (psSF->bEthCSSupport)
	iPacketLen = QueuePacket->len;
	else
	iPacketLen = QueuePacket->len-ETH_HLEN;

	iPacketLen <<= 3;
	if (iPacketLen <= GetSFTokenCount(Adapter, psSF)) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Allowed bytes %d",
	(iPacketLen >> 3));

	DEQUEUEPACKET(psSF->FirstTxQueue, psSF->LastTxQueue);
	psSF->uiCurrentBytesOnHost -= (QueuePacket->len);
	psSF->uiCurrentPacketsOnHost--;
	atomic_dec(&Adapter->TotalPacketCount);
	spin_unlock_bh(&psSF->SFQueueLock);

	Status = SendPacketFromQueue(Adapter, psSF, QueuePacket);
	psSF->uiPendedLast = FALSE;
	} else {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "For Queue: %zd\n", psSF-Adapter->PackInfo);
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nAvailable Tokens = %d required = %d\n",
	psSF->uiCurrentTokenCount, iPacketLen);
	/*
	this part indicates that because of non-availability of the tokens
	pkt has not been send out hence setting the pending flag indicating the host to send it out
	first next iteration.
	*/
	psSF->uiPendedLast = TRUE;
	spin_unlock_bh(&psSF->SFQueueLock);
	}
	} else {
	spin_unlock_bh(&psSF->SFQueueLock);
	}
	} else {

	if ((atomic_read(&Adapter->CurrNumFreeTxDesc) > 0) &&
	(atomic_read(&Adapter->index_rd_txcntrlpkt) !=
	atomic_read(&Adapter->index_wr_txcntrlpkt))) {
	pControlPacket = Adapter->txctlpacket
	[(atomic_read(&Adapter->index_rd_txcntrlpkt)%MAX_CNTRL_PKTS)];
	if (pControlPacket) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Sending Control packet");
	Status = SendControlPacket(Adapter, pControlPacket);
	if (STATUS_SUCCESS == Status) {
	spin_lock_bh(&psSF->SFQueueLock);
	psSF->NumOfPacketsSent++;
	psSF->uiSentBytes += ((struct bcm_leader *)pControlPacket)->PLength;
	psSF->uiSentPackets++;
	atomic_dec(&Adapter->TotalPacketCount);
	psSF->uiCurrentBytesOnHost -= ((struct bcm_leader *)pControlPacket)->PLength;
	psSF->uiCurrentPacketsOnHost--;
	atomic_inc(&Adapter->index_rd_txcntrlpkt);
	spin_unlock_bh(&psSF->SFQueueLock);
	} else {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "SendControlPacket Failed\n");
	}
	} else {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, " Control Pkt is not available, Indexing is wrong....");
	}
	}
	}
	}


	/*******************************************************************
	* Function - transmit_packets()
	*
	* Description - This function transmits the packets from different
	* queues, if free descriptors are available on target.
	*
	* Parameters - Adapter: Pointer to the Adapter structure.
	*
	* Returns - None.
	********************************************************************/
	VOID transmit_packets(struct bcm_mini_adapter *Adapter)
	{
	UINT uiPrevTotalCount = 0;
	int iIndex = 0;

	BOOLEAN exit_flag = TRUE;

	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "=====>");

	if (NULL == Adapter) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Got NULL Adapter");
	return;
	}
	if (Adapter->device_removed == TRUE) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Device removed");
	return;
	}

	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nUpdateTokenCount ====>\n");

	UpdateTokenCount(Adapter);

	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nPruneQueueAllSF ====>\n");

	PruneQueueAllSF(Adapter);

	uiPrevTotalCount = atomic_read(&Adapter->TotalPacketCount);

	for (iIndex = HiPriority; iIndex >= 0; iIndex--) {
	if (!uiPrevTotalCount \|\| (TRUE == Adapter->device_removed))
	break;

	if (Adapter->PackInfo[iIndex].bValid &&
	Adapter->PackInfo[iIndex].uiPendedLast &&
	Adapter->PackInfo[iIndex].uiCurrentBytesOnHost) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Calling CheckAndSendPacketFromIndex..");
	CheckAndSendPacketFromIndex(Adapter, &Adapter->PackInfo[iIndex]);
	uiPrevTotalCount--;
	}
	}

	while (uiPrevTotalCount > 0 && !Adapter->device_removed) {
	exit_flag = TRUE;
	/* second iteration to parse non-pending queues */
	for (iIndex = HiPriority; iIndex >= 0; iIndex--) {
	if (!uiPrevTotalCount \|\| (TRUE == Adapter->device_removed))
	break;

	if (Adapter->PackInfo[iIndex].bValid &&
	Adapter->PackInfo[iIndex].uiCurrentBytesOnHost &&
	!Adapter->PackInfo[iIndex].uiPendedLast) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Calling CheckAndSendPacketFromIndex..");
	CheckAndSendPacketFromIndex(Adapter, &Adapter->PackInfo[iIndex]);
	uiPrevTotalCount--;
	exit_flag = FALSE;
	}
	}

	if (Adapter->IdleMode \|\| Adapter->bPreparingForLowPowerMode) {
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "In Idle Mode\n");
	break;
	}
	if (exit_flag == TRUE)
	break;
	} /* end of inner while loop */

	update_per_cid_rx(Adapter);
	Adapter->txtransmit_running = 0;
	BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "<======");
	}