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/**********************************************************************
* 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;
bool 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, "<======");
}
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