/* ----------------------------------------------------
get the descriptor memory usage in bytes
*/
IX_STATUS
ixAtmdAccDescMgmtMemoryUsageGet (unsigned int *descriptorMemoryUsagePtr)
{
IX_ATMDACC_ENSURE (initDone, "Initailisation Error");
IX_ATMDACC_DESCMGMT_LOCK();
/* sanity check */
IX_ATMDACC_ENSURE(npeDescCount <= IX_ATMDACC_MAX_NPE_DESCRIPTORS,
"descriptor pool index corrupted");
/* sanity check */
IX_ATMDACC_ENSURE((descMgmtStats.allocateCount -
descMgmtStats.releaseCount) ==
(IX_ATMDACC_MAX_NPE_DESCRIPTORS - npeDescCount) ,
"descriptor pool index corrupted");
/* get the memory usage */
*descriptorMemoryUsagePtr = (descMgmtStats.allocateCount -
descMgmtStats.releaseCount) * sizeof (IxAtmdAccNpeDescriptor);
IX_ATMDACC_DESCMGMT_UNLOCK();
return IX_SUCCESS;
}
/* ----------------------------------------------------
release a NPE descriptor
*/
IX_STATUS
ixAtmdAccDescNpeDescriptorRelease (IxAtmdAccNpeDescriptor* npeDescriptorPtr)
{
IX_STATUS returnStatus = IX_SUCCESS;
IX_ATMDACC_ENSURE (initDone, "Initialisation Error");
IX_ATMDACC_ENSURE (npeDescriptorPtr != NULL, "Release null descriptor");
IX_ATMDACC_DESCMGMT_LOCK();
/* ensure pool availabilility */
IX_ATMDACC_ENSURE(npeDescCount < IX_ATMDACC_MAX_NPE_DESCRIPTORS,
"running out of space in pool descriptor");
/* check pool availabilility */
if (npeDescCount < IX_ATMDACC_MAX_NPE_DESCRIPTORS)
{
/* put element to the pool */
npeDescriptorArray[npeDescCount++] = npeDescriptorPtr;
/* update stats */
descMgmtStats.releaseCount++;
}
else
{
returnStatus = IX_FAIL;
} /* end of if-else(npeDescCount) */
IX_ATMDACC_DESCMGMT_UNLOCK();
return returnStatus;
}
/* ----------------------------------------------
*/
PRIVATE IX_STATUS
ixAtmdAccDummyStateChangeHandler (IxAtmLogicalPort port,
IxAtmdAccPortState newState)
{
IX_ATMDACC_ENSURE(0, "PortMgmt No StateChange Handler Registered");
return IX_FAIL;
}
/* ----------------------------------------------
*/
PRIVATE IX_STATUS
ixAtmdAccUtopiaStatusRead (IxAtmdAccUtopiaStatus *utStatus)
{
IX_STATUS returnStatus = IX_SUCCESS;
UINT32 utStatusWords[sizeof(IxAtmdAccUtopiaStatus)/sizeof(UINT32)];
int numWords = sizeof(IxAtmdAccUtopiaStatus)/sizeof(UINT32);
int wordCnt;
UINT32 readOffset;
IX_ATMDACC_ENSURE (numWords < 64, "out of bound structure");
ixOsalMemSet (utStatus, 0, sizeof (IxAtmdAccUtopiaStatus));
/* Read the status table from NPE memory */
for (wordCnt = 0;
(wordCnt < numWords) && (returnStatus == IX_SUCCESS);
wordCnt++)
{
/* offset to read */
readOffset = wordCnt * sizeof(UINT32);
/* read the word of the status table at this offset */
returnStatus = ixAtmdAccUtilNpeMsgWithResponseSend(
IX_NPE_A_MSSG_ATM_UTOPIA_STATUS_READ,
readOffset,
NPE_IGNORE,
ixAtmdAccNpeStatusReadCallback);
if (returnStatus == IX_SUCCESS)
{
/* Wait for ixAtmdAccNpeReadCallback to release */
IX_ATMDACC_NPE_RESPONSE_LOCK_GET ();
/* Check the address matches the address from ixAtmdAccNpeReadCallback */
IX_ATMDACC_ENSURE (npeRespOffsetRead == readOffset, "Read error");
/* Copy the word read from NPE memory into the utopia status
* structure. NOTE: npewordRead is set by ixAtmdAccNpeReadCallback
*/
utStatusWords[wordCnt] = npeRespWordRead;
} /* end of if(returnStatus) */
} /* end of for(wordCnt) */
ixAtmdAccNpeStatusGenerate(utStatus,utStatusWords);
return returnStatus;
}
/* ----------------------------------------------
*/
PRIVATE void
ixAtmdAccNpeStatusReadCallback (IxNpeMhNpeId npeMhNpeId,
IxNpeMhMessage npeMhMessage)
{
UINT32 id;
/* Check NpeId */
IX_ATMDACC_ENSURE (npeMhNpeId == IX_NPEMH_NPEID_NPEA, "wrong npeMhNpeId");
/* Check Id */
id = npeMhMessage.data[0] & NPE_RESP_ID_MASK;
IX_ATMDACC_ENSURE (id == NPE_UT_STATUS_READ_EXPECTED_ID, "wrong id");
npeRespOffsetRead = npeMhMessage.data[0] & NPE_RESP_OFFSET_MASK;
npeRespWordRead = npeMhMessage.data[1];
/* Unblock the reading context */
IX_ATMDACC_NPE_RESPONSE_LOCK_RELEASE ();
}
/* ----------------------------------------------------
get a NPE descriptor
*/
IX_STATUS
ixAtmdAccDescNpeDescriptorGet (IxAtmdAccNpeDescriptor** npeDescriptorPtr)
{
IX_STATUS returnStatus = IX_SUCCESS;
IX_ATMDACC_ENSURE (initDone, "Initialisation Error");
IX_ATMDACC_DESCMGMT_LOCK();
/* check parameter */
IX_ATMDACC_ENSURE (npeDescriptorPtr != NULL, "null pointer parameter");
/* sanity check */
IX_ATMDACC_ENSURE(npeDescCount <= IX_ATMDACC_MAX_NPE_DESCRIPTORS,
"descriptor pool index corrupted");
/* check there is an entry in the pool */
IX_ATMDACC_ENSURE (npeDescCount > 0, "Pool size mismatch");
if (npeDescCount > 0)
{
/* get the descriptor from the pool */
*npeDescriptorPtr = npeDescriptorArray[--npeDescCount];
ixOsalMemSet(&(*npeDescriptorPtr)->npe, 0, sizeof((*npeDescriptorPtr)->npe));
/* update stats */
descMgmtStats.allocateCount++;
}
else
{
returnStatus = IX_FAIL;
} /* end of if-else(npeDescCount) */
IX_ATMDACC_DESCMGMT_UNLOCK();
return returnStatus;
}
/* ----------------------------------------------
*/
PRIVATE void
ixAtmdAccUtopiaConfigLoadCallback (IxNpeMhNpeId npeMhNpeId,
IxNpeMhMessage npeMhMessage)
{
UINT32 id;
UINT32 status;
/* Check NpeId */
IX_ATMDACC_ENSURE (npeMhNpeId == IX_NPEMH_NPEID_NPEA, "wrong npeMhNpeId");
/* Check the ID */
id = npeMhMessage.data[0] & NPE_RESP_ID_MASK;
IX_ATMDACC_ENSURE (id == NPE_UT_CONFIG_LOAD_EXPECTED_ID, "wrong id");
/* Check the status */
status = npeMhMessage.data[0] & NPE_RESP_STATUS_MASK;
IX_ATMDACC_ENSURE (status == NPE_SUCCESS, "wrong status");
/* Unblock the config get context */
IX_ATMDACC_NPE_RESPONSE_LOCK_RELEASE ();
}
/* ----------------------------------------------------
* Display current stats
*/
void
ixAtmdAccDescMgmtStatsShow (void)
{
unsigned int currentDescCount; /* module descriptor allocated snapshot */
IxAtmdAccDescMgmtStats currentDescMgmtStats; /* module statistics snapshot */
unsigned int descSize = ((sizeof (IxAtmdAccNpeDescriptor) + (NPE_ADDR_ALIGN - 1))
/ NPE_ADDR_ALIGN)
* NPE_ADDR_ALIGN;
/* get a snapshot */
IX_ATMDACC_DESCMGMT_LOCK();
currentDescMgmtStats = descMgmtStats;
currentDescCount = npeDescCount;
/* sanity check */
IX_ATMDACC_ENSURE((descMgmtStats.allocateCount -
descMgmtStats.releaseCount) ==
(IX_ATMDACC_MAX_NPE_DESCRIPTORS - npeDescCount) ,
"descriptor pool index corrupted");
IX_ATMDACC_DESCMGMT_UNLOCK();
/* display the snapshot */
printf ("Npe Descriptors memory allocation\n");
printf ("Pool size in bytes ......... : %10u bytes\n",
descSize * IX_ATMDACC_MAX_NPE_DESCRIPTORS);
printf ("Descriptor size ............ : %10u bytes\n",
(unsigned int)sizeof (IxAtmdAccNpeDescriptor));
printf ("Pool depth ................. : %10u descriptors\n",
IX_ATMDACC_MAX_NPE_DESCRIPTORS);
printf ("Alloc'd .................... : %10u\n",
currentDescMgmtStats.allocateCount);
printf ("Free'd ..................... : %10u\n",
currentDescMgmtStats.releaseCount);
printf ("Pool usage ................. : %10u descriptors\n",
descMgmtStats.allocateCount - descMgmtStats.releaseCount);
}
/* ----------------------------------------------
*/
PRIVATE IX_STATUS
ixAtmdAccUtopiaConfigWrite (const IxAtmdAccUtopiaConfig *utConfig)
{
IX_STATUS returnStatus = IX_SUCCESS;
UINT32 npeWords[sizeof (IxAtmdAccUtopiaConfig) / sizeof (UINT32)];
int numWords = sizeof (IxAtmdAccUtopiaConfig) / sizeof (UINT32);
int wordCnt;
IX_ATMDACC_ENSURE (numWords < 64, "out of bound structure");
ixAtmdAccUtopiaConfigGenerate(utConfig, npeWords);
/* Write one word of the config at a time to NPE-A */
for (wordCnt = 0;
(wordCnt < numWords) && (returnStatus == IX_SUCCESS);
wordCnt++)
{
returnStatus = ixAtmdAccUtilNpeMsgSend (IX_NPE_A_MSSG_ATM_UTOPIA_CONFIG_WRITE,
wordCnt * sizeof(UINT32),
npeWords[wordCnt]);
} /* end of for(wordCnt) */
return returnStatus;
}
/* ---------------------------------------------------------
* Convert the requested number of cells to queue entries for NPE-A
*
* qMgrEntryPtr is a pointer to an internal array of entries
* This array, when ready, will be flushed by the qMgr
* physicalAddress : physical address of a NPE descriptor which is
* bound to the PDU to be sent, or 0 for Idle cells
* cellCount : number of cells to send (data cell or idle cell)
* cellType : Type of the cells to send (data cells or idle cells)
*/
PRIVATE void
ixAtmdAccCellTx (UINT32 **qMgrEntryPtr,
unsigned int physicalAddress,
unsigned int cellCount,
unsigned int cellType)
{
IX_ATMDACC_ENSURE (cellCount != 0, "Bad cell count!");
/* The following algorthim is designed for performance and
* is a variation on Duff's Device, which is widely documented.
* - ``Duff's device'' had come up in comp.lang.c as soon as 1983
* - The device is to express general loop unrolling directly in C.
* - The device is legal dpANS C. X3J11 considered it carefully and decided that it
* was legal. The device is also legal C++, since Bjarne uses it in his book.
*
* The algorithm is designed to replace the following slow code
*
* while (cellCount > 15)
* { qEntry = buildEntry(15 cells, physicaladdress, type);
* qMgrWriteReturnStatus = qMgrWrite(...qEntry)
* cellCount -= 15;
* }
* if (cellCount > 0)
* { qEntry = buildEntry(cellCount, physicaladdress, type);
* qMgrWriteReturnStatus = qMgrWrite(...qEntry)
* }
* return qMgrWriteReturnStatus
*
* The algorithm exploits
* the fall through of the switch statement to process
* successive queue entries of NPE_TX_MAXCELLS_PER_QENTRY cells,
* Any residual cells are placed in the final queue entryin a separate step
* after the loop ends.
* This reduces the number of a control loop iterations by a factor of 8.
*/
if(cellCount > NPE_TX_MAXCELLS_PER_QENTRY)
{
/* get the number of qEntries with a full count of cells
* using an integer division with round-down to the previous integer
*/
unsigned int qEntryCount = cellCount / NPE_TX_MAXCELLS_PER_QENTRY;
/* get the number of iterations using an integer division
* with round-up to the next integer
*/
unsigned int n = (qEntryCount + 7)/8;
/* build one entry with the maximum of cells per entry . This queue
* entry is always
*/
UINT32 qEntry = ixAtmdAccTxQueueEntryBuild (physicalAddress,
NPE_TX_MAXCELLS_PER_QENTRY,
cellType);
/* store X queue entries with a number of cells
* equal to NPE_TX_MAXCELLS_PER_QENTRY
*/
switch(qEntryCount & 7)
{
case 0: do { *(*qMgrEntryPtr)++ = qEntry;
case 7: *(*qMgrEntryPtr)++ = qEntry;
case 6: *(*qMgrEntryPtr)++ = qEntry;
case 5: *(*qMgrEntryPtr)++ = qEntry;
case 4: *(*qMgrEntryPtr)++ = qEntry;
case 3: *(*qMgrEntryPtr)++ = qEntry;
case 2: *(*qMgrEntryPtr)++ = qEntry;
case 1: *(*qMgrEntryPtr)++ = qEntry;
} while (--n > 0);
}
/* check for any more cells to process (sub and mul are faster than mod)
* cellCount = qEntryCount % NPE_TX_MAXCELLS_PER_QENTRY
*/
cellCount -= qEntryCount * NPE_TX_MAXCELLS_PER_QENTRY;
if(cellCount == 0)
{
/* all done (the number of cells was an
* exact multiple of NPE_TX_MAXCELLS_PER_QENTRY
*/
return;
}
}
/* store 1 queue entry with a number of cells
* between 1 and NPE_TX_MAXCELLS_PER_QENTRY (included)
*/
*(*qMgrEntryPtr)++ = ixAtmdAccTxQueueEntryBuild (physicalAddress,
cellCount,
cellType);
return;
}
/* ----------------------------------------------
*/
PRIVATE BOOL
ixAtmdAccDummyStateQuery (IxAtmLogicalPort port)
{
IX_ATMDACC_ENSURE(0, "PortMgmt No State Check Registered");
return FALSE;
}
/* ----------------------------------------------
*/
PRIVATE void
ixAtmdAccDummySetupNotifyHandler (unsigned int numPort)
{
IX_ATMDACC_ENSURE(0, "PortMgmt No Setup Handler Registered");
}
