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PHSModule.c
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#include "headers.h"
static UINT CreateSFToClassifierRuleMapping(B_UINT16 uiVcid,
B_UINT16 uiClsId,
struct bcm_phs_table *psServiceFlowTable,
struct bcm_phs_rule *psPhsRule,
B_UINT8 u8AssociatedPHSI);
static UINT CreateClassiferToPHSRuleMapping(B_UINT16 uiVcid,
B_UINT16 uiClsId,
struct bcm_phs_entry *pstServiceFlowEntry,
struct bcm_phs_rule *psPhsRule,
B_UINT8 u8AssociatedPHSI);
static UINT CreateClassifierPHSRule(B_UINT16 uiClsId,
struct bcm_phs_classifier_table *psaClassifiertable,
struct bcm_phs_rule *psPhsRule,
enum bcm_phs_classifier_context eClsContext,
B_UINT8 u8AssociatedPHSI);
static UINT UpdateClassifierPHSRule(B_UINT16 uiClsId,
struct bcm_phs_classifier_entry *pstClassifierEntry,
struct bcm_phs_classifier_table *psaClassifiertable,
struct bcm_phs_rule *psPhsRule,
B_UINT8 u8AssociatedPHSI);
static bool ValidatePHSRuleComplete(const struct bcm_phs_rule *psPhsRule);
static bool DerefPhsRule(B_UINT16 uiClsId,
struct bcm_phs_classifier_table *psaClassifiertable,
struct bcm_phs_rule *pstPhsRule);
static UINT GetClassifierEntry(struct bcm_phs_classifier_table *pstClassifierTable,
B_UINT32 uiClsid,
enum bcm_phs_classifier_context eClsContext,
struct bcm_phs_classifier_entry **ppstClassifierEntry);
static UINT GetPhsRuleEntry(struct bcm_phs_classifier_table *pstClassifierTable,
B_UINT32 uiPHSI,
enum bcm_phs_classifier_context eClsContext,
struct bcm_phs_rule **ppstPhsRule);
static void free_phs_serviceflow_rules(struct bcm_phs_table *psServiceFlowRulesTable);
static int phs_compress(struct bcm_phs_rule *phs_members,
unsigned char *in_buf,
unsigned char *out_buf,
unsigned int *header_size,
UINT *new_header_size);
static int verify_suppress_phsf(unsigned char *in_buffer,
unsigned char *out_buffer,
unsigned char *phsf,
unsigned char *phsm,
unsigned int phss,
unsigned int phsv,
UINT *new_header_size);
static int phs_decompress(unsigned char *in_buf,
unsigned char *out_buf,
struct bcm_phs_rule *phs_rules,
UINT *header_size);
static ULONG PhsCompress(void *pvContext,
B_UINT16 uiVcid,
B_UINT16 uiClsId,
void *pvInputBuffer,
void *pvOutputBuffer,
UINT *pOldHeaderSize,
UINT *pNewHeaderSize);
static ULONG PhsDeCompress(void *pvContext,
B_UINT16 uiVcid,
void *pvInputBuffer,
void *pvOutputBuffer,
UINT *pInHeaderSize,
UINT *pOutHeaderSize);
#define IN
#define OUT
/*
* Function: PHSTransmit
* Description: This routine handle PHS(Payload Header Suppression for Tx path.
* It extracts a fragment of the NDIS_PACKET containing the header
* to be suppressed. It then suppresses the header by invoking PHS exported compress routine.
* The header data after suppression is copied back to the NDIS_PACKET.
*
* Input parameters: IN struct bcm_mini_adapter *Adapter - Miniport Adapter Context
* IN Packet - NDIS packet containing data to be transmitted
* IN USHORT Vcid - vcid pertaining to connection on which the packet is being sent.Used to
* identify PHS rule to be applied.
* B_UINT16 uiClassifierRuleID - Classifier Rule ID
* BOOLEAN bHeaderSuppressionEnabled - indicates if header suprression is enabled for SF.
*
* Return: STATUS_SUCCESS - If the send was successful.
* Other - If an error occurred.
*/
int PHSTransmit(struct bcm_mini_adapter *Adapter,
struct sk_buff **pPacket,
USHORT Vcid,
B_UINT16 uiClassifierRuleID,
bool bHeaderSuppressionEnabled,
UINT *PacketLen,
UCHAR bEthCSSupport)
{
/* PHS Sepcific */
UINT unPHSPktHdrBytesCopied = 0;
UINT unPhsOldHdrSize = 0;
UINT unPHSNewPktHeaderLen = 0;
/* Pointer to PHS IN Hdr Buffer */
PUCHAR pucPHSPktHdrInBuf =
Adapter->stPhsTxContextInfo.ucaHdrSuppressionInBuf;
/* Pointer to PHS OUT Hdr Buffer */
PUCHAR pucPHSPktHdrOutBuf =
Adapter->stPhsTxContextInfo.ucaHdrSuppressionOutBuf;
UINT usPacketType;
UINT BytesToRemove = 0;
bool bPHSI = 0;
LONG ulPhsStatus = 0;
UINT numBytesCompressed = 0;
struct sk_buff *newPacket = NULL;
struct sk_buff *Packet = *pPacket;
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_SEND, DBG_LVL_ALL,
"In PHSTransmit");
if (!bEthCSSupport)
BytesToRemove = ETH_HLEN;
/*
* Accumulate the header upto the size we support suppression
* from NDIS packet
*/
usPacketType = ((struct ethhdr *)(Packet->data))->h_proto;
pucPHSPktHdrInBuf = Packet->data + BytesToRemove;
/* considering data after ethernet header */
if ((*PacketLen - BytesToRemove) < MAX_PHS_LENGTHS)
unPHSPktHdrBytesCopied = (*PacketLen - BytesToRemove);
else
unPHSPktHdrBytesCopied = MAX_PHS_LENGTHS;
if ((unPHSPktHdrBytesCopied > 0) &&
(unPHSPktHdrBytesCopied <= MAX_PHS_LENGTHS)) {
/*
* Step 2 Suppress Header using PHS and fill into intermediate
* ucaPHSPktHdrOutBuf.
* Suppress only if IP Header and PHS Enabled For the
* Service Flow
*/
if (((usPacketType == ETHERNET_FRAMETYPE_IPV4) ||
(usPacketType == ETHERNET_FRAMETYPE_IPV6)) &&
(bHeaderSuppressionEnabled)) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_SEND,
DBG_LVL_ALL,
"\nTrying to PHS Compress Using Classifier rule 0x%X",
uiClassifierRuleID);
unPHSNewPktHeaderLen = unPHSPktHdrBytesCopied;
ulPhsStatus = PhsCompress(&Adapter->stBCMPhsContext,
Vcid,
uiClassifierRuleID,
pucPHSPktHdrInBuf,
pucPHSPktHdrOutBuf,
&unPhsOldHdrSize,
&unPHSNewPktHeaderLen);
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_SEND,
DBG_LVL_ALL,
"\nPHS Old header Size : %d New Header Size %d\n",
unPhsOldHdrSize, unPHSNewPktHeaderLen);
if (unPHSNewPktHeaderLen == unPhsOldHdrSize) {
if (ulPhsStatus == STATUS_PHS_COMPRESSED)
bPHSI = *pucPHSPktHdrOutBuf;
ulPhsStatus = STATUS_PHS_NOCOMPRESSION;
}
if (ulPhsStatus == STATUS_PHS_COMPRESSED) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS,
PHS_SEND, DBG_LVL_ALL,
"PHS Sending packet Compressed");
if (skb_cloned(Packet)) {
newPacket =
skb_copy(Packet, GFP_ATOMIC);
if (newPacket == NULL)
return STATUS_FAILURE;
dev_kfree_skb(Packet);
*pPacket = Packet = newPacket;
pucPHSPktHdrInBuf =
Packet->data + BytesToRemove;
}
numBytesCompressed = unPhsOldHdrSize -
(unPHSNewPktHeaderLen + PHSI_LEN);
memcpy(pucPHSPktHdrInBuf + numBytesCompressed,
pucPHSPktHdrOutBuf,
unPHSNewPktHeaderLen + PHSI_LEN);
memcpy(Packet->data + numBytesCompressed,
Packet->data, BytesToRemove);
skb_pull(Packet, numBytesCompressed);
return STATUS_SUCCESS;
} else {
/* if one byte headroom is not available,
* increase it through skb_cow
*/
if (!(skb_headroom(Packet) > 0)) {
if (skb_cow(Packet, 1)) {
BCM_DEBUG_PRINT(Adapter,
DBG_TYPE_PRINTK,
0, 0,
"SKB Cow Failed\n");
return STATUS_FAILURE;
}
}
skb_push(Packet, 1);
/*
* CAUTION: The MAC Header is getting corrupted
* here for IP CS - can be saved by copying 14
* Bytes. not needed .... hence corrupting it.
*/
*(Packet->data + BytesToRemove) = bPHSI;
return STATUS_SUCCESS;
}
} else {
if (!bHeaderSuppressionEnabled)
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS,
PHS_SEND, DBG_LVL_ALL,
"\nHeader Suppression Disabled For SF: No PHS\n");
return STATUS_SUCCESS;
}
}
/* BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, PHS_SEND, DBG_LVL_ALL,
* "PHSTransmit : Dumping data packet After PHS"); */
return STATUS_SUCCESS;
}
int PHSReceive(struct bcm_mini_adapter *Adapter,
USHORT usVcid,
struct sk_buff *packet,
UINT *punPacketLen,
UCHAR *pucEthernetHdr,
UINT bHeaderSuppressionEnabled)
{
u32 nStandardPktHdrLen = 0;
u32 nTotalsuppressedPktHdrBytes = 0;
int ulPhsStatus = 0;
PUCHAR pucInBuff = NULL;
UINT TotalBytesAdded = 0;
if (!bHeaderSuppressionEnabled) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_RECEIVE,
DBG_LVL_ALL,
"\nPhs Disabled for incoming packet");
return ulPhsStatus;
}
pucInBuff = packet->data;
/* Restore PHS suppressed header */
nStandardPktHdrLen = packet->len;
ulPhsStatus = PhsDeCompress(&Adapter->stBCMPhsContext,
usVcid,
pucInBuff,
Adapter->ucaPHSPktRestoreBuf,
&nTotalsuppressedPktHdrBytes,
&nStandardPktHdrLen);
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_RECEIVE, DBG_LVL_ALL,
"\nSuppressed PktHdrLen : 0x%x Restored PktHdrLen : 0x%x",
nTotalsuppressedPktHdrBytes, nStandardPktHdrLen);
if (ulPhsStatus != STATUS_PHS_COMPRESSED) {
skb_pull(packet, 1);
return STATUS_SUCCESS;
} else {
TotalBytesAdded = nStandardPktHdrLen -
nTotalsuppressedPktHdrBytes - PHSI_LEN;
if (TotalBytesAdded) {
if (skb_headroom(packet) >= (SKB_RESERVE_ETHERNET_HEADER + TotalBytesAdded))
skb_push(packet, TotalBytesAdded);
else {
if (skb_cow(packet, skb_headroom(packet) + TotalBytesAdded)) {
BCM_DEBUG_PRINT(Adapter,
DBG_TYPE_PRINTK, 0, 0,
"cow failed in receive\n");
return STATUS_FAILURE;
}
skb_push(packet, TotalBytesAdded);
}
}
memcpy(packet->data, Adapter->ucaPHSPktRestoreBuf,
nStandardPktHdrLen);
}
return STATUS_SUCCESS;
}
void DumpFullPacket(UCHAR *pBuf, UINT nPktLen)
{
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, IPV4_DBG, DBG_LVL_ALL,
"Dumping Data Packet");
BCM_DEBUG_PRINT_BUFFER(Adapter, DBG_TYPE_TX, IPV4_DBG, DBG_LVL_ALL,
pBuf, nPktLen);
}
/*
* Procedure: phs_init
*
* Description: This routine is responsible for allocating memory for classifier
* and PHS rules.
*
* Arguments:
* pPhsdeviceExtension - ptr to Device extension containing PHS Classifier rules
* and PHS Rules , RX, TX buffer etc
*
* Returns:
* TRUE(1) -If allocation of memory was successful.
* FALSE -If allocation of memory fails.
*/
int phs_init(struct bcm_phs_extension *pPhsdeviceExtension,
struct bcm_mini_adapter *Adapter)
{
int i;
struct bcm_phs_table *pstServiceFlowTable;
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH, DBG_LVL_ALL,
"\nPHS:phs_init function");
if (pPhsdeviceExtension->pstServiceFlowPhsRulesTable)
return -EINVAL;
pPhsdeviceExtension->pstServiceFlowPhsRulesTable =
kzalloc(sizeof(struct bcm_phs_table), GFP_KERNEL);
if (!pPhsdeviceExtension->pstServiceFlowPhsRulesTable) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH,
DBG_LVL_ALL,
"\nAllocation ServiceFlowPhsRulesTable failed");
return -ENOMEM;
}
pstServiceFlowTable = pPhsdeviceExtension->pstServiceFlowPhsRulesTable;
for (i = 0; i < MAX_SERVICEFLOWS; i++) {
struct bcm_phs_entry sServiceFlow =
pstServiceFlowTable->stSFList[i];
sServiceFlow.pstClassifierTable =
kzalloc(sizeof(struct bcm_phs_classifier_table),
GFP_KERNEL);
if (!sServiceFlow.pstClassifierTable) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH,
DBG_LVL_ALL, "\nAllocation failed");
free_phs_serviceflow_rules(pPhsdeviceExtension->pstServiceFlowPhsRulesTable);
pPhsdeviceExtension->pstServiceFlowPhsRulesTable = NULL;
return -ENOMEM;
}
}
pPhsdeviceExtension->CompressedTxBuffer = kmalloc(PHS_BUFFER_SIZE, GFP_KERNEL);
if (pPhsdeviceExtension->CompressedTxBuffer == NULL) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH,
DBG_LVL_ALL, "\nAllocation failed");
free_phs_serviceflow_rules(pPhsdeviceExtension->pstServiceFlowPhsRulesTable);
pPhsdeviceExtension->pstServiceFlowPhsRulesTable = NULL;
return -ENOMEM;
}
pPhsdeviceExtension->UnCompressedRxBuffer =
kmalloc(PHS_BUFFER_SIZE, GFP_KERNEL);
if (pPhsdeviceExtension->UnCompressedRxBuffer == NULL) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH,
DBG_LVL_ALL, "\nAllocation failed");
kfree(pPhsdeviceExtension->CompressedTxBuffer);
free_phs_serviceflow_rules(pPhsdeviceExtension->pstServiceFlowPhsRulesTable);
pPhsdeviceExtension->pstServiceFlowPhsRulesTable = NULL;
return -ENOMEM;
}
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH, DBG_LVL_ALL,
"\n phs_init Successful");
return STATUS_SUCCESS;
}
int PhsCleanup(IN struct bcm_phs_extension *pPHSDeviceExt)
{
if (pPHSDeviceExt->pstServiceFlowPhsRulesTable) {
free_phs_serviceflow_rules(pPHSDeviceExt->pstServiceFlowPhsRulesTable);
pPHSDeviceExt->pstServiceFlowPhsRulesTable = NULL;
}
kfree(pPHSDeviceExt->CompressedTxBuffer);
pPHSDeviceExt->CompressedTxBuffer = NULL;
kfree(pPHSDeviceExt->UnCompressedRxBuffer);
pPHSDeviceExt->UnCompressedRxBuffer = NULL;
return 0;
}
/*
* PHS functions
* PhsUpdateClassifierRule
*
* Routine Description:
* Exported function to add or modify a PHS Rule.
*
* Arguments:
* IN void* pvContext - PHS Driver Specific Context
* IN B_UINT16 uiVcid - The Service Flow ID for which the PHS rule applies
* IN B_UINT16 uiClsId - The Classifier ID within the Service Flow for which the PHS rule applies.
* IN struct bcm_phs_rule *psPhsRule - The PHS Rule strcuture to be added to the PHS Rule table.
*
* Return Value:
*
* 0 if successful,
* >0 Error.
*/
ULONG PhsUpdateClassifierRule(IN void *pvContext,
IN B_UINT16 uiVcid ,
IN B_UINT16 uiClsId ,
IN struct bcm_phs_rule *psPhsRule,
IN B_UINT8 u8AssociatedPHSI)
{
ULONG lStatus = 0;
UINT nSFIndex = 0;
struct bcm_phs_entry *pstServiceFlowEntry = NULL;
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
struct bcm_phs_extension *pDeviceExtension =
(struct bcm_phs_extension *)pvContext;
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH, DBG_LVL_ALL,
"PHS With Corr2 Changes\n");
if (pDeviceExtension == NULL) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH,
DBG_LVL_ALL, "Invalid Device Extension\n");
return ERR_PHS_INVALID_DEVICE_EXETENSION;
}
if (u8AssociatedPHSI == 0)
return ERR_PHS_INVALID_PHS_RULE;
/* Retrieve the SFID Entry Index for requested Service Flow */
nSFIndex = GetServiceFlowEntry(pDeviceExtension->pstServiceFlowPhsRulesTable,
uiVcid, &pstServiceFlowEntry);
if (nSFIndex == PHS_INVALID_TABLE_INDEX) {
/* This is a new SF. Create a mapping entry for this */
lStatus = CreateSFToClassifierRuleMapping(uiVcid, uiClsId,
pDeviceExtension->pstServiceFlowPhsRulesTable,
psPhsRule,
u8AssociatedPHSI);
return lStatus;
}
/* SF already Exists Add PHS Rule to existing SF */
lStatus = CreateClassiferToPHSRuleMapping(uiVcid, uiClsId,
pstServiceFlowEntry,
psPhsRule,
u8AssociatedPHSI);
return lStatus;
}
/*
* PhsDeletePHSRule
*
* Routine Description:
* Deletes the specified phs Rule within Vcid
*
* Arguments:
* IN void* pvContext - PHS Driver Specific Context
* IN B_UINT16 uiVcid - The Service Flow ID for which the PHS rule applies
* IN B_UINT8 u8PHSI - the PHS Index identifying PHS rule to be deleted.
*
* Return Value:
*
* 0 if successful,
* >0 Error.
*/
ULONG PhsDeletePHSRule(IN void *pvContext,
IN B_UINT16 uiVcid,
IN B_UINT8 u8PHSI)
{
UINT nSFIndex = 0, nClsidIndex = 0;
struct bcm_phs_entry *pstServiceFlowEntry = NULL;
struct bcm_phs_classifier_table *pstClassifierRulesTable = NULL;
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
struct bcm_phs_extension *pDeviceExtension = (struct bcm_phs_extension *)pvContext;
struct bcm_phs_classifier_entry *curr_entry;
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH, DBG_LVL_ALL,
"======>\n");
if (pDeviceExtension) {
/* Retrieve the SFID Entry Index for requested Service Flow */
nSFIndex = GetServiceFlowEntry(pDeviceExtension->pstServiceFlowPhsRulesTable,
uiVcid, &pstServiceFlowEntry);
if (nSFIndex == PHS_INVALID_TABLE_INDEX) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH,
DBG_LVL_ALL, "SFID Match Failed\n");
return ERR_SF_MATCH_FAIL;
}
pstClassifierRulesTable = pstServiceFlowEntry->pstClassifierTable;
if (pstClassifierRulesTable) {
for (nClsidIndex = 0; nClsidIndex < MAX_PHSRULE_PER_SF; nClsidIndex++) {
curr_entry = &pstClassifierRulesTable->stActivePhsRulesList[nClsidIndex];
if (curr_entry->bUsed &&
curr_entry->pstPhsRule &&
(curr_entry->pstPhsRule->u8PHSI == u8PHSI)) {
if (curr_entry->pstPhsRule->u8RefCnt)
curr_entry->pstPhsRule->u8RefCnt--;
if (0 == curr_entry->pstPhsRule->u8RefCnt)
kfree(curr_entry->pstPhsRule);
memset(curr_entry,
0,
sizeof(struct bcm_phs_classifier_entry));
}
}
}
}
return 0;
}
/*
* PhsDeleteClassifierRule
*
* Routine Description:
* Exported function to Delete a PHS Rule for the SFID,CLSID Pair.
*
* Arguments:
* IN void* pvContext - PHS Driver Specific Context
* IN B_UINT16 uiVcid - The Service Flow ID for which the PHS rule applies
* IN B_UINT16 uiClsId - The Classifier ID within the Service Flow for which the PHS rule applies.
*
* Return Value:
*
* 0 if successful,
* >0 Error.
*/
ULONG PhsDeleteClassifierRule(IN void *pvContext,
IN B_UINT16 uiVcid,
IN B_UINT16 uiClsId)
{
UINT nSFIndex = 0, nClsidIndex = 0;
struct bcm_phs_entry *pstServiceFlowEntry = NULL;
struct bcm_phs_classifier_entry *pstClassifierEntry = NULL;
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
struct bcm_phs_extension *pDeviceExtension =
(struct bcm_phs_extension *)pvContext;
if (!pDeviceExtension)
goto out;
/* Retrieve the SFID Entry Index for requested Service Flow */
nSFIndex = GetServiceFlowEntry(pDeviceExtension->pstServiceFlowPhsRulesTable,
uiVcid, &pstServiceFlowEntry);
if (nSFIndex == PHS_INVALID_TABLE_INDEX) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH,
DBG_LVL_ALL, "SFID Match Failed\n");
return ERR_SF_MATCH_FAIL;
}
nClsidIndex =
GetClassifierEntry(pstServiceFlowEntry->pstClassifierTable,
uiClsId,
eActiveClassifierRuleContext,
&pstClassifierEntry);
if ((nClsidIndex != PHS_INVALID_TABLE_INDEX) &&
(!pstClassifierEntry->bUnclassifiedPHSRule)) {
if (pstClassifierEntry->pstPhsRule) {
if (pstClassifierEntry->pstPhsRule->u8RefCnt)
pstClassifierEntry->pstPhsRule->u8RefCnt--;
if (0 == pstClassifierEntry->pstPhsRule->u8RefCnt)
kfree(pstClassifierEntry->pstPhsRule);
}
memset(pstClassifierEntry, 0,
sizeof(struct bcm_phs_classifier_entry));
}
nClsidIndex =
GetClassifierEntry(pstServiceFlowEntry->pstClassifierTable,
uiClsId,
eOldClassifierRuleContext,
&pstClassifierEntry);
if ((nClsidIndex != PHS_INVALID_TABLE_INDEX) &&
(!pstClassifierEntry->bUnclassifiedPHSRule)) {
kfree(pstClassifierEntry->pstPhsRule);
memset(pstClassifierEntry, 0,
sizeof(struct bcm_phs_classifier_entry));
}
out:
return 0;
}
/*
* PhsDeleteSFRules
*
* Routine Description:
* Exported function to Delete a all PHS Rules for the SFID.
*
* Arguments:
* IN void* pvContext - PHS Driver Specific Context
* IN B_UINT16 uiVcid - The Service Flow ID for which the PHS rules need to be deleted
*
* Return Value:
*
* 0 if successful,
* >0 Error.
*/
ULONG PhsDeleteSFRules(IN void *pvContext, IN B_UINT16 uiVcid)
{
UINT nSFIndex = 0, nClsidIndex = 0;
struct bcm_phs_entry *pstServiceFlowEntry = NULL;
struct bcm_phs_classifier_table *pstClassifierRulesTable = NULL;
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
struct bcm_phs_extension *pDeviceExtension =
(struct bcm_phs_extension *)pvContext;
struct bcm_phs_classifier_entry *curr_clsf_entry;
struct bcm_phs_classifier_entry *curr_rules_list;
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH, DBG_LVL_ALL,
"====>\n");
if (!pDeviceExtension)
goto out;
/* Retrieve the SFID Entry Index for requested Service Flow */
nSFIndex = GetServiceFlowEntry(pDeviceExtension->pstServiceFlowPhsRulesTable,
uiVcid, &pstServiceFlowEntry);
if (nSFIndex == PHS_INVALID_TABLE_INDEX) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH,
DBG_LVL_ALL, "SFID Match Failed\n");
return ERR_SF_MATCH_FAIL;
}
pstClassifierRulesTable = pstServiceFlowEntry->pstClassifierTable;
if (pstClassifierRulesTable) {
for (nClsidIndex = 0; nClsidIndex < MAX_PHSRULE_PER_SF; nClsidIndex++) {
curr_clsf_entry =
&pstClassifierRulesTable->stActivePhsRulesList[nClsidIndex];
curr_rules_list =
&pstClassifierRulesTable->stOldPhsRulesList[nClsidIndex];
if (curr_clsf_entry->pstPhsRule) {
if (curr_clsf_entry->pstPhsRule->u8RefCnt)
curr_clsf_entry->pstPhsRule->u8RefCnt--;
if (0 == curr_clsf_entry->pstPhsRule->u8RefCnt)
kfree(curr_clsf_entry->pstPhsRule);
curr_clsf_entry->pstPhsRule = NULL;
}
memset(curr_clsf_entry, 0,
sizeof(struct bcm_phs_classifier_entry));
if (curr_rules_list->pstPhsRule) {
if (curr_rules_list->pstPhsRule->u8RefCnt)
curr_rules_list->pstPhsRule->u8RefCnt--;
if (0 == curr_rules_list->pstPhsRule->u8RefCnt)
kfree(curr_rules_list->pstPhsRule);
curr_rules_list->pstPhsRule = NULL;
}
memset(curr_rules_list, 0,
sizeof(struct bcm_phs_classifier_entry));
}
}
pstServiceFlowEntry->bUsed = false;
pstServiceFlowEntry->uiVcid = 0;
out:
return 0;
}
/*
* PhsCompress
*
* Routine Description:
* Exported function to compress the data using PHS.
*
* Arguments:
* IN void* pvContext - PHS Driver Specific Context.
* IN B_UINT16 uiVcid - The Service Flow ID to which current
* packet header compression applies.
* IN UINT uiClsId - The Classifier ID to which current packet
* header compression applies.
* IN void *pvInputBuffer - The Input buffer containg packet header
* data
* IN void *pvOutputBuffer - The output buffer returned by this
* function after PHS
* IN UINT *pOldHeaderSize - The actual size of the header before PHS
* IN UINT *pNewHeaderSize - The new size of the header after applying
* PHS
*
* Return Value:
*
* 0 if successful,
* >0 Error.
*/
static ULONG PhsCompress(IN void *pvContext,
IN B_UINT16 uiVcid,
IN B_UINT16 uiClsId,
IN void *pvInputBuffer,
OUT void *pvOutputBuffer,
OUT UINT *pOldHeaderSize,
OUT UINT *pNewHeaderSize)
{
UINT nSFIndex = 0, nClsidIndex = 0;
struct bcm_phs_entry *pstServiceFlowEntry = NULL;
struct bcm_phs_classifier_entry *pstClassifierEntry = NULL;
struct bcm_phs_rule *pstPhsRule = NULL;
ULONG lStatus = 0;
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
struct bcm_phs_extension *pDeviceExtension =
(struct bcm_phs_extension *)pvContext;
if (pDeviceExtension == NULL) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_SEND, DBG_LVL_ALL,
"Invalid Device Extension\n");
lStatus = STATUS_PHS_NOCOMPRESSION;
return lStatus;
}
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_SEND, DBG_LVL_ALL,
"Suppressing header\n");
/* Retrieve the SFID Entry Index for requested Service Flow */
nSFIndex = GetServiceFlowEntry(pDeviceExtension->pstServiceFlowPhsRulesTable,
uiVcid, &pstServiceFlowEntry);
if (nSFIndex == PHS_INVALID_TABLE_INDEX) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_SEND, DBG_LVL_ALL,
"SFID Match Failed\n");
lStatus = STATUS_PHS_NOCOMPRESSION;
return lStatus;
}
nClsidIndex = GetClassifierEntry(pstServiceFlowEntry->pstClassifierTable,
uiClsId, eActiveClassifierRuleContext,
&pstClassifierEntry);
if (nClsidIndex == PHS_INVALID_TABLE_INDEX) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_SEND, DBG_LVL_ALL,
"No PHS Rule Defined For Classifier\n");
lStatus = STATUS_PHS_NOCOMPRESSION;
return lStatus;
}
/* get rule from SF id,Cls ID pair and proceed */
pstPhsRule = pstClassifierEntry->pstPhsRule;
if (!ValidatePHSRuleComplete(pstPhsRule)) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH, DBG_LVL_ALL,
"PHS Rule Defined For Classifier But Not Complete\n");
lStatus = STATUS_PHS_NOCOMPRESSION;
return lStatus;
}
/* Compress Packet */
lStatus = phs_compress(pstPhsRule,
(PUCHAR)pvInputBuffer,
(PUCHAR)pvOutputBuffer,
pOldHeaderSize,
pNewHeaderSize);
if (lStatus == STATUS_PHS_COMPRESSED) {
pstPhsRule->PHSModifiedBytes +=
*pOldHeaderSize - *pNewHeaderSize - 1;
pstPhsRule->PHSModifiedNumPackets++;
} else {
pstPhsRule->PHSErrorNumPackets++;
}
return lStatus;
}
/*
* PhsDeCompress
*
* Routine Description:
* Exported function to restore the packet header in Rx path.
*
* Arguments:
* IN void* pvContext - PHS Driver Specific Context.
* IN B_UINT16 uiVcid - The Service Flow ID to which current
* packet header restoration applies.
* IN void *pvInputBuffer - The Input buffer containg suppressed
* packet header data
* OUT void *pvOutputBuffer - The output buffer returned by this
* function after restoration
* OUT UINT *pHeaderSize - The packet header size after restoration
* is returned in this parameter.
*
* Return Value:
*
* 0 if successful,
* >0 Error.
*/
static ULONG PhsDeCompress(IN void *pvContext,
IN B_UINT16 uiVcid,
IN void *pvInputBuffer,
OUT void *pvOutputBuffer,
OUT UINT *pInHeaderSize,
OUT UINT *pOutHeaderSize)
{
UINT nSFIndex = 0, nPhsRuleIndex = 0;
struct bcm_phs_entry *pstServiceFlowEntry = NULL;
struct bcm_phs_rule *pstPhsRule = NULL;
UINT phsi;
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
struct bcm_phs_extension *pDeviceExtension =
(struct bcm_phs_extension *)pvContext;
*pInHeaderSize = 0;
if (pDeviceExtension == NULL) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_RECEIVE,
DBG_LVL_ALL, "Invalid Device Extension\n");
return ERR_PHS_INVALID_DEVICE_EXETENSION;
}
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_RECEIVE, DBG_LVL_ALL,
"Restoring header\n");
phsi = *((unsigned char *)(pvInputBuffer));
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_RECEIVE, DBG_LVL_ALL,
"PHSI To Be Used For restore : %x\n", phsi);
if (phsi == UNCOMPRESSED_PACKET)
return STATUS_PHS_NOCOMPRESSION;
/* Retrieve the SFID Entry Index for requested Service Flow */
nSFIndex = GetServiceFlowEntry(pDeviceExtension->pstServiceFlowPhsRulesTable,
uiVcid, &pstServiceFlowEntry);
if (nSFIndex == PHS_INVALID_TABLE_INDEX) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_RECEIVE,
DBG_LVL_ALL,
"SFID Match Failed During Lookup\n");
return ERR_SF_MATCH_FAIL;
}
nPhsRuleIndex = GetPhsRuleEntry(pstServiceFlowEntry->pstClassifierTable,
phsi,
eActiveClassifierRuleContext,
&pstPhsRule);
if (nPhsRuleIndex == PHS_INVALID_TABLE_INDEX) {
/* Phs Rule does not exist in active rules table. Lets try
* in the old rules table. */
nPhsRuleIndex = GetPhsRuleEntry(pstServiceFlowEntry->pstClassifierTable,
phsi,
eOldClassifierRuleContext,
&pstPhsRule);
if (nPhsRuleIndex == PHS_INVALID_TABLE_INDEX)
return ERR_PHSRULE_MATCH_FAIL;
}
*pInHeaderSize = phs_decompress((PUCHAR)pvInputBuffer,
(PUCHAR)pvOutputBuffer,
pstPhsRule,
pOutHeaderSize);
pstPhsRule->PHSModifiedBytes += *pOutHeaderSize - *pInHeaderSize - 1;
pstPhsRule->PHSModifiedNumPackets++;
return STATUS_PHS_COMPRESSED;
}
/*
* Procedure: free_phs_serviceflow_rules
*
* Description: This routine is responsible for freeing memory allocated for
* PHS rules.
*
* Arguments:
* rules - ptr to S_SERVICEFLOW_TABLE structure.
*
* Returns:
* Does not return any value.
*/
static void free_phs_serviceflow_rules(struct bcm_phs_table *psServiceFlowRulesTable)
{
int i, j;
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
struct bcm_phs_classifier_entry *curr_act_rules_list;
struct bcm_phs_classifier_entry *curr_old_rules_list;
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, PHS_DISPATCH, DBG_LVL_ALL,
"=======>\n");
if (!psServiceFlowRulesTable)
goto out;
for (i = 0; i < MAX_SERVICEFLOWS; i++) {
struct bcm_phs_entry stServiceFlowEntry =
psServiceFlowRulesTable->stSFList[i];
struct bcm_phs_classifier_table *pstClassifierRulesTable =
stServiceFlowEntry.pstClassifierTable;
if (pstClassifierRulesTable) {
for (j = 0; j < MAX_PHSRULE_PER_SF; j++) {
curr_act_rules_list =
&pstClassifierRulesTable->stActivePhsRulesList[j];
curr_old_rules_list =
&pstClassifierRulesTable->stOldPhsRulesList[j];
if (curr_act_rules_list->pstPhsRule) {
if (curr_act_rules_list->pstPhsRule->u8RefCnt)
curr_act_rules_list->pstPhsRule->u8RefCnt--;
if (0 == curr_act_rules_list->pstPhsRule->u8RefCnt)
kfree(curr_act_rules_list->pstPhsRule);
curr_act_rules_list->pstPhsRule = NULL;
}
if (curr_old_rules_list->pstPhsRule) {
if (curr_old_rules_list->pstPhsRule->u8RefCnt)
curr_old_rules_list->pstPhsRule->u8RefCnt--;
if (0 == curr_old_rules_list->pstPhsRule->u8RefCnt)
kfree(curr_old_rules_list->pstPhsRule);
curr_old_rules_list->pstPhsRule = NULL;
}
}
kfree(pstClassifierRulesTable);
stServiceFlowEntry.pstClassifierTable =
pstClassifierRulesTable = NULL;
}
}
out:
kfree(psServiceFlowRulesTable);
psServiceFlowRulesTable = NULL;
}
static bool ValidatePHSRuleComplete(IN const struct bcm_phs_rule *psPhsRule)
{
return (psPhsRule &&
psPhsRule->u8PHSI &&
psPhsRule->u8PHSS &&
psPhsRule->u8PHSFLength);
}
UINT GetServiceFlowEntry(IN struct bcm_phs_table *psServiceFlowTable,
IN B_UINT16 uiVcid,
struct bcm_phs_entry **ppstServiceFlowEntry)
{
int i;
struct bcm_phs_entry *curr_sf_list;
for (i = 0; i < MAX_SERVICEFLOWS; i++) {
curr_sf_list = &psServiceFlowTable->stSFList[i];
if (curr_sf_list->bUsed && (curr_sf_list->uiVcid == uiVcid)) {
*ppstServiceFlowEntry = curr_sf_list;
return i;
}
}
*ppstServiceFlowEntry = NULL;
return PHS_INVALID_TABLE_INDEX;
}
static UINT GetClassifierEntry(IN struct bcm_phs_classifier_table *pstClassifierTable,
IN B_UINT32 uiClsid,
enum bcm_phs_classifier_context eClsContext,
OUT struct bcm_phs_classifier_entry **ppstClassifierEntry)