5cf084f44a
Unused, unneeded, and bogus. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
354 lines
11 KiB
C
354 lines
11 KiB
C
/**********************************************************************
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* LEAKYBUCKET.C
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* This file contains the routines related to Leaky Bucket Algorithm.
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***********************************************************************/
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#include "headers.h"
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/*********************************************************************
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* Function - UpdateTokenCount()
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*
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* Description - This function calculates the token count for each
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* channel and updates the same in Adapter strucuture.
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*
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* Parameters - Adapter: Pointer to the Adapter structure.
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*
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* Returns - None
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**********************************************************************/
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static VOID UpdateTokenCount(register PMINI_ADAPTER Adapter)
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{
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ULONG liCurrentTime;
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INT i = 0;
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struct timeval tv;
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "=====>\n");
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if(NULL == Adapter)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "Adapter found NULL!\n");
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return;
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}
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do_gettimeofday(&tv);
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for(i = 0; i < NO_OF_QUEUES; i++)
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{
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if(TRUE == Adapter->PackInfo[i].bValid &&
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(1 == Adapter->PackInfo[i].ucDirection))
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{
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liCurrentTime = ((tv.tv_sec-
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Adapter->PackInfo[i].stLastUpdateTokenAt.tv_sec)*1000 +
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(tv.tv_usec-Adapter->PackInfo[i].stLastUpdateTokenAt.tv_usec)/
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1000);
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if(0!=liCurrentTime)
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{
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Adapter->PackInfo[i].uiCurrentTokenCount += (ULONG)
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((Adapter->PackInfo[i].uiMaxAllowedRate) *
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((ULONG)((liCurrentTime)))/1000);
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memcpy(&Adapter->PackInfo[i].stLastUpdateTokenAt,
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&tv, sizeof(struct timeval));
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Adapter->PackInfo[i].liLastUpdateTokenAt = liCurrentTime;
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if((Adapter->PackInfo[i].uiCurrentTokenCount) >=
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Adapter->PackInfo[i].uiMaxBucketSize)
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{
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Adapter->PackInfo[i].uiCurrentTokenCount =
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Adapter->PackInfo[i].uiMaxBucketSize;
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}
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}
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}
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}
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "<=====\n");
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return;
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}
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/*********************************************************************
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* Function - IsPacketAllowedForFlow()
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*
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* Description - This function checks whether the given packet from the
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* specified queue can be allowed for transmission by
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* checking the token count.
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*
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* Parameters - Adapter : Pointer to the Adpater structure.
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* - iQIndex : The queue Identifier.
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* - ulPacketLength: Number of bytes to be transmitted.
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*
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* Returns - The number of bytes allowed for transmission.
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*
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***********************************************************************/
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static ULONG GetSFTokenCount(PMINI_ADAPTER Adapter, PacketInfo *psSF)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IsPacketAllowedForFlow ===>");
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/* Validate the parameters */
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if(NULL == Adapter || (psSF < Adapter->PackInfo &&
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(uintptr_t)psSF > (uintptr_t) &Adapter->PackInfo[HiPriority]))
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{
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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));
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return 0;
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}
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if(FALSE != psSF->bValid && psSF->ucDirection)
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{
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if(0 != psSF->uiCurrentTokenCount)
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{
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return psSF->uiCurrentTokenCount;
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}
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else
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "Not enough tokens in queue %zd Available %u\n",
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psSF-Adapter->PackInfo, psSF->uiCurrentTokenCount);
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psSF->uiPendedLast = 1;
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}
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}
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else
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IPAFF: Queue %zd not valid\n", psSF-Adapter->PackInfo);
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}
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TOKEN_COUNTS, DBG_LVL_ALL, "IsPacketAllowedForFlow <===");
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return 0;
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}
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/**
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@ingroup tx_functions
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This function despatches packet from the specified queue.
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@return Zero(success) or Negative value(failure)
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*/
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static INT SendPacketFromQueue(PMINI_ADAPTER Adapter,/**<Logical Adapter*/
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PacketInfo *psSF, /**<Queue identifier*/
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struct sk_buff* Packet) /**<Pointer to the packet to be sent*/
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{
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INT Status=STATUS_FAILURE;
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UINT uiIndex =0,PktLen = 0;
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "=====>");
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if(!Adapter || !Packet || !psSF)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "Got NULL Adapter or Packet");
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return -EINVAL;
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}
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if(psSF->liDrainCalculated==0)
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{
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psSF->liDrainCalculated = jiffies;
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}
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///send the packet to the fifo..
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PktLen = Packet->len;
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Status = SetupNextSend(Adapter, Packet, psSF->usVCID_Value);
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if(Status == 0)
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{
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for(uiIndex = 0 ; uiIndex < MIBS_MAX_HIST_ENTRIES ; uiIndex++)
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{ if((PktLen <= MIBS_PKTSIZEHIST_RANGE*(uiIndex+1)) && (PktLen > MIBS_PKTSIZEHIST_RANGE*(uiIndex)))
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Adapter->aTxPktSizeHist[uiIndex]++;
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}
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}
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, SEND_QUEUE, DBG_LVL_ALL, "<=====");
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return Status;
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}
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/************************************************************************
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* Function - CheckAndSendPacketFromIndex()
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*
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* Description - This function dequeues the data/control packet from the
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* specified queue for transmission.
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*
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* Parameters - Adapter : Pointer to the driver control structure.
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* - iQIndex : The queue Identifier.
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*
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* Returns - None.
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*
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****************************************************************************/
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static VOID CheckAndSendPacketFromIndex(PMINI_ADAPTER Adapter, PacketInfo *psSF)
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{
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struct sk_buff *QueuePacket=NULL;
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char *pControlPacket = NULL;
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INT Status=0;
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int iPacketLen=0;
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "%zd ====>", (psSF-Adapter->PackInfo));
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if((psSF != &Adapter->PackInfo[HiPriority]) && Adapter->LinkUpStatus && atomic_read(&psSF->uiPerSFTxResourceCount))//Get data packet
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{
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if(!psSF->ucDirection )
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return;
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "UpdateTokenCount ");
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if(Adapter->IdleMode || Adapter->bPreparingForLowPowerMode)
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return; /* in idle mode */
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// Check for Free Descriptors
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if(atomic_read(&Adapter->CurrNumFreeTxDesc) <= MINIMUM_PENDING_DESCRIPTORS)
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{
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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));
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return ;
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}
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spin_lock_bh(&psSF->SFQueueLock);
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QueuePacket=psSF->FirstTxQueue;
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if(QueuePacket)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Dequeuing Data Packet");
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if(psSF->bEthCSSupport)
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iPacketLen = QueuePacket->len;
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else
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iPacketLen = QueuePacket->len-ETH_HLEN;
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iPacketLen<<=3;
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if(iPacketLen <= GetSFTokenCount(Adapter, psSF))
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Allowed bytes %d",
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(iPacketLen >> 3));
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DEQUEUEPACKET(psSF->FirstTxQueue,psSF->LastTxQueue);
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psSF->uiCurrentBytesOnHost -= (QueuePacket->len);
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psSF->uiCurrentPacketsOnHost--;
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atomic_dec(&Adapter->TotalPacketCount);
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spin_unlock_bh(&psSF->SFQueueLock);
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Status = SendPacketFromQueue(Adapter, psSF, QueuePacket);
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psSF->uiPendedLast = FALSE;
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}
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else
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "For Queue: %zd\n", psSF-Adapter->PackInfo);
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nAvailable Tokens = %d required = %d\n",
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psSF->uiCurrentTokenCount, iPacketLen);
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//this part indicates that becuase of non-availability of the tokens
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//pkt has not been send out hence setting the pending flag indicating the host to send it out
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//first next iteration .
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psSF->uiPendedLast = TRUE;
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spin_unlock_bh(&psSF->SFQueueLock);
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}
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}
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else
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{
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spin_unlock_bh(&psSF->SFQueueLock);
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}
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}
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else
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{
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if((atomic_read(&Adapter->CurrNumFreeTxDesc) > 0 ) &&
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(atomic_read(&Adapter->index_rd_txcntrlpkt) !=
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atomic_read(&Adapter->index_wr_txcntrlpkt))
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)
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{
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pControlPacket = Adapter->txctlpacket
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[(atomic_read(&Adapter->index_rd_txcntrlpkt)%MAX_CNTRL_PKTS)];
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if(pControlPacket)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Sending Control packet");
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Status = SendControlPacket(Adapter, pControlPacket);
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if(STATUS_SUCCESS==Status)
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{
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spin_lock_bh(&psSF->SFQueueLock);
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psSF->NumOfPacketsSent++;
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psSF->uiSentBytes+=((PLEADER)pControlPacket)->PLength;
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psSF->uiSentPackets++;
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atomic_dec(&Adapter->TotalPacketCount);
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psSF->uiCurrentBytesOnHost -= ((PLEADER)pControlPacket)->PLength;
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psSF->uiCurrentPacketsOnHost--;
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atomic_inc(&Adapter->index_rd_txcntrlpkt);
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spin_unlock_bh(&psSF->SFQueueLock);
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}
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else
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "SendControlPacket Failed\n");
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}
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else
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, " Control Pkt is not available, Indexing is wrong....");
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}
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}
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}
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}
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/*******************************************************************
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* Function - transmit_packets()
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*
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* Description - This function transmits the packets from different
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* queues, if free descriptors are available on target.
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*
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* Parameters - Adapter: Pointer to the Adapter structure.
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*
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* Returns - None.
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********************************************************************/
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VOID transmit_packets(PMINI_ADAPTER Adapter)
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{
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UINT uiPrevTotalCount = 0;
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int iIndex = 0;
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BOOLEAN exit_flag = TRUE ;
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "=====>");
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if(NULL == Adapter)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX,TX_PACKETS, DBG_LVL_ALL, "Got NULL Adapter");
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return;
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}
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if(Adapter->device_removed == TRUE)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Device removed");
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return;
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}
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BCM_DEBUG_PRINT (Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nUpdateTokenCount ====>\n");
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UpdateTokenCount(Adapter);
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BCM_DEBUG_PRINT (Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "\nPruneQueueAllSF ====>\n");
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PruneQueueAllSF(Adapter);
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uiPrevTotalCount = atomic_read(&Adapter->TotalPacketCount);
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for(iIndex=HiPriority;iIndex>=0;iIndex--)
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{
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if( !uiPrevTotalCount || (TRUE == Adapter->device_removed))
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break;
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if(Adapter->PackInfo[iIndex].bValid &&
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Adapter->PackInfo[iIndex].uiPendedLast &&
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Adapter->PackInfo[iIndex].uiCurrentBytesOnHost)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Calling CheckAndSendPacketFromIndex..");
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CheckAndSendPacketFromIndex(Adapter, &Adapter->PackInfo[iIndex]);
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uiPrevTotalCount--;
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}
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}
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while(uiPrevTotalCount > 0 && !Adapter->device_removed)
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{
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exit_flag = TRUE ;
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//second iteration to parse non-pending queues
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for(iIndex=HiPriority;iIndex>=0;iIndex--)
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{
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if( !uiPrevTotalCount || (TRUE == Adapter->device_removed))
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break;
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if(Adapter->PackInfo[iIndex].bValid &&
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Adapter->PackInfo[iIndex].uiCurrentBytesOnHost &&
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!Adapter->PackInfo[iIndex].uiPendedLast )
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Calling CheckAndSendPacketFromIndex..");
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CheckAndSendPacketFromIndex(Adapter, &Adapter->PackInfo[iIndex]);
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uiPrevTotalCount--;
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exit_flag = FALSE;
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}
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}
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if(Adapter->IdleMode || Adapter->bPreparingForLowPowerMode)
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{
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "In Idle Mode\n");
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break;
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}
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if(exit_flag == TRUE )
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break ;
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}/* end of inner while loop */
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update_per_cid_rx (Adapter);
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Adapter->txtransmit_running = 0;
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BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "<======");
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}
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