wct4xxp: Reduce the memory footprint of the hardware echocanceler.

This saves ~300K of kernel memory for each quad or dual span VPM.  Due
to the fact that this change disables caching of the NLP words (among
other things), the time to disable the echocans appears to have
increased by ~1ms.

Before this change:
=======================================================================
0) ! 356.498 us  |  vpm450m_setecmode(); <--- disable
0) ! 387.762 us  |  vpm450m_setecmode(); <--- enable
0) ! 429.839 us  |  vpm450m_setecmode(); <--- disable

]# echo 1 > /proc/sys/vm/drop_caches && free -k
total       used       free     shared    buffers     cached
Mem:       2005352     228368    1776984          0        132
5540
-/+ buffers/cache:     222696    1782656
Swap:       983036          0     983036

After this change:
=======================================================================
0) ! 1109.515 us |  vpm450m_setecmode(); <--- disable
0) ! 339.017 us  |  vpm450m_setecmode(); <--- enable
0) ! 1431.460 us |  vpm450m_setecmode(); <--- disable

]# echo 1 > /proc/sys/vm/drop_caches && free -k
total       used       free     shared    buffers     cached
Mem:       2005352     228080    1777272          0        112
5484
-/+ buffers/cache:     222484    1782868
Swap:       983036          0     983036

Signed-off-by: Shaun Ruffell <sruffell@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9750 a0bf4364-ded3-4de4-8d8a-66a801d63aff

2 files changed, 7 insertions, 8 deletions

diff --git a/software/octdeviceapi/oct6100api/oct6100_api/oct6100_channel.c b/software/octdeviceapi/oct6100api/oct6100_api/oct6100_channel.c
index 49a876f..f06b64b 100644
--- a/software/octdeviceapi/oct6100api/oct6100_api/oct6100_channel.c
+++ b/software/octdeviceapi/oct6100api/oct6100_api/oct6100_channel.c
@@ -5481,7 +5481,7 @@ UINT32 Oct6100ApiModifyChannelStructs(
 	if ( f_pChannelModify->fDisableToneDetection == TRUE )
 	{
 		/* Check if tone detection has been enabled on this channel. */
-		for ( ulToneConfIndex = 0; ulToneConfIndex < ( sizeof( pChanEntry->aulToneConf ) / sizeof(UINT32) ); ulToneConfIndex ++ )
+		for (ulToneConfIndex = 0; ulToneConfIndex < ARRAY_SIZE(pChanEntry->aulToneConf); ulToneConfIndex++)
 		{
 			/* Check if some tone has been activated on this channel. */
 			if ( pChanEntry->aulToneConf[ ulToneConfIndex ] != 0 )
diff --git a/software/octdeviceapi/oct6100api/oct6100_api/oct6100_chip_open.c b/software/octdeviceapi/oct6100api/oct6100_api/oct6100_chip_open.c
index 00c0fec..14f13e0 100644
--- a/software/octdeviceapi/oct6100api/oct6100_api/oct6100_chip_open.c
+++ b/software/octdeviceapi/oct6100api/oct6100_api/oct6100_chip_open.c
@@ -200,7 +200,7 @@ UINT32 Oct6100ChipOpenDef(
 	f_pChipOpen->fEnableAcousticEcho = FALSE;
 
 	/* Resource allocation parameters. */
-	f_pChipOpen->ulMaxChannels = 672;
+	f_pChipOpen->ulMaxChannels = 256;
 	f_pChipOpen->ulMaxTsiCncts = 0;
 	f_pChipOpen->ulMaxBiDirChannels = 0;
 	f_pChipOpen->ulMaxConfBridges = 0;
@@ -219,7 +219,7 @@ UINT32 Oct6100ChipOpenDef(
 	f_pChipOpen->fEnableFastH100Mode = FALSE;
 
 	/* Configure the soft tone event buffer. */
-	f_pChipOpen->ulSoftToneEventsBufSize = 2048;
+	f_pChipOpen->ulSoftToneEventsBufSize = 128;
 	f_pChipOpen->fEnableExtToneDetection = FALSE;
 	f_pChipOpen->fEnable2100StopEvent = FALSE;
 
@@ -240,7 +240,7 @@ UINT32 Oct6100ChipOpenDef(
 	f_pChipOpen->InterruptConfig.ulFatalMemoryTimeout = 100;
 	f_pChipOpen->InterruptConfig.ulErrorH100Timeout = 100;
 	f_pChipOpen->InterruptConfig.ulErrorOverflowToneEventsTimeout = 100;
-	f_pChipOpen->ulMaxRemoteDebugSessions = 1;
+	f_pChipOpen->ulMaxRemoteDebugSessions = 0;
 	f_pChipOpen->ulTdmSampling = cOCT6100_TDM_SAMPLE_AT_3_QUARTERS;
 	for ( i = 0; i < cOCT6100_TDM_STREAM_MAX_GROUPS; i++ )
 		f_pChipOpen->aulTdmStreamFreqs[ i ] = cOCT6100_TDM_STREAM_FREQ_8MHZ;
@@ -321,6 +321,7 @@ UINT32 Oct6100ChipOpen(
 	InstanceSizes = kmalloc(sizeof(tOCT6100_API_INSTANCE_SIZES), GFP_ATOMIC);
 	if (!InstanceSizes)
 		return cOCT6100_ERR_FATAL_0;
+
 	/* Calculate the amount of memory needed for the API instance structure. */
 	ulResult = Oct6100ApiCalculateInstanceSizes( f_pChipOpen, InstanceSizes );
 	if ( ulResult != cOCT6100_ERR_OK ) {
@@ -1180,7 +1181,7 @@ UINT32 Oct6100ApiCheckChipConfiguration(
 
 	/*-----------------------------------------------------------------------------*/
 	/* Check soft buffer for tone events size. */
-	if ( f_pChipOpen->ulSoftToneEventsBufSize < cOCT6100_NUM_PGSP_EVENT_OUT ||
+	if (f_pChipOpen->ulSoftToneEventsBufSize < 64 ||
 		 f_pChipOpen->ulSoftToneEventsBufSize > cOCT6100_ABSOLUTE_MAX_NUM_PGSP_EVENT_OUT )
 		return cOCT6100_ERR_OPEN_SOFT_TONE_EVENT_SIZE;
 
@@ -1678,6 +1679,7 @@ UINT32 Oct6100ApiCalculateInstanceSizes(
 	/*-----------------------------------------------------------------------------*/
 	/* Calculate memory needed for the conference bridges. */
 	ulResult = Oct6100ApiGetConfBridgeSwSizes( f_pChipOpen, f_pInstSizes );
+	/* Calculate memory needed for list and allocation software serialization. */
 	if ( ulResult != cOCT6100_ERR_OK )
 		return ulResult;
 
@@ -1687,8 +1689,6 @@ UINT32 Oct6100ApiCalculateInstanceSizes(
 	if ( ulResult != cOCT6100_ERR_OK )
 		return ulResult;
 
-
-
 	/*-----------------------------------------------------------------------------*/
 	/* Memory needed by soft Rx Event buffers. */
 	ulResult = Oct6100ApiGetEventsSwSizes( f_pChipOpen, f_pInstSizes );
@@ -1741,7 +1741,6 @@ UINT32 Oct6100ApiCalculateInstanceSizes(
 
 	ulApiInstProcessSpecific = sizeof( tOCT6100_INSTANCE_API );
 	mOCT6100_ROUND_MEMORY_SIZE( ulApiInstProcessSpecific, ulTempVar )
-
 	f_pInstSizes->ulApiInstTotal = 
 									f_pInstSizes->ulChannelList +
 									f_pInstSizes->ulChannelAlloc +