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M7350/wlan/host/htc2/htc_recv.c

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M7350v1_en_gpl
2024-09-09 08:52:07 +00:00
//------------------------------------------------------------------------------
// ISC License (ISC)
//
// Copyright (c) 2007-2010, The Linux Foundation
// All rights reserved.
// Software was previously licensed under ISC license by Qualcomm Atheros, Inc.
//
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
//
//------------------------------------------------------------------------------
//==============================================================================
// Author(s): ="Atheros"
//==============================================================================
#include "htc_internal.h"
#define HTCIssueRecv(t, p) \
DevRecvPacket(&(t)->Device, \
(p), \
(p)->ActualLength)
#define DO_RCV_COMPLETION(e,q) DoRecvCompletion(e,q)
#define DUMP_RECV_PKT_INFO(pP) \
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, (" HTC RECV packet 0x%lX (%d bytes) (hdr:0x%X) on ep : %d \n", \
(unsigned long)(pP), \
(pP)->ActualLength, \
(pP)->PktInfo.AsRx.ExpectedHdr, \
(pP)->Endpoint))
#ifdef HTC_EP_STAT_PROFILING
#define HTC_RX_STAT_PROFILE(t,ep,numLookAheads) \
{ \
INC_HTC_EP_STAT((ep), RxReceived, 1); \
if ((numLookAheads) == 1) { \
INC_HTC_EP_STAT((ep), RxLookAheads, 1); \
} else if ((numLookAheads) > 1) { \
INC_HTC_EP_STAT((ep), RxBundleLookAheads, 1); \
} \
}
#else
#define HTC_RX_STAT_PROFILE(t,ep,lookAhead)
#endif
static void DoRecvCompletion(HTC_ENDPOINT *pEndpoint,
HTC_PACKET_QUEUE *pQueueToIndicate)
{
do {
if (HTC_QUEUE_EMPTY(pQueueToIndicate)) {
/* nothing to indicate */
break;
}
if (pEndpoint->EpCallBacks.EpRecvPktMultiple != NULL) {
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, (" HTC calling ep %d, recv multiple callback (%d pkts) \n",
pEndpoint->Id, HTC_PACKET_QUEUE_DEPTH(pQueueToIndicate)));
/* a recv multiple handler is being used, pass the queue to the handler */
pEndpoint->EpCallBacks.EpRecvPktMultiple(pEndpoint->EpCallBacks.pContext,
pQueueToIndicate);
INIT_HTC_PACKET_QUEUE(pQueueToIndicate);
} else {
HTC_PACKET *pPacket;
/* using legacy EpRecv */
do {
pPacket = HTC_PACKET_DEQUEUE(pQueueToIndicate);
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, (" HTC calling ep %d recv callback on packet 0x%lX \n", \
pEndpoint->Id, (unsigned long)(pPacket)));
pEndpoint->EpCallBacks.EpRecv(pEndpoint->EpCallBacks.pContext, pPacket);
} while (!HTC_QUEUE_EMPTY(pQueueToIndicate));
}
} while (FALSE);
}
static INLINE A_STATUS HTCProcessTrailer(HTC_TARGET *target,
A_UINT8 *pBuffer,
int Length,
A_UINT32 *pNextLookAheads,
int *pNumLookAheads,
HTC_ENDPOINT_ID FromEndpoint)
{
HTC_RECORD_HDR *pRecord;
A_UINT8 *pRecordBuf;
HTC_LOOKAHEAD_REPORT *pLookAhead;
A_UINT8 *pOrigBuffer;
int origLength;
A_STATUS status;
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("+HTCProcessTrailer (length:%d) \n", Length));
if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_RECV)) {
AR_DEBUG_PRINTBUF(pBuffer,Length,"Recv Trailer");
}
pOrigBuffer = pBuffer;
origLength = Length;
status = A_OK;
while (Length > 0) {
if (Length < sizeof(HTC_RECORD_HDR)) {
status = A_EPROTO;
break;
}
/* these are byte aligned structs */
pRecord = (HTC_RECORD_HDR *)pBuffer;
Length -= sizeof(HTC_RECORD_HDR);
pBuffer += sizeof(HTC_RECORD_HDR);
if (pRecord->Length > Length) {
/* no room left in buffer for record */
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
(" invalid record length: %d (id:%d) buffer has: %d bytes left \n",
pRecord->Length, pRecord->RecordID, Length));
status = A_EPROTO;
break;
}
/* start of record follows the header */
pRecordBuf = pBuffer;
switch (pRecord->RecordID) {
case HTC_RECORD_CREDITS:
AR_DEBUG_ASSERT(pRecord->Length >= sizeof(HTC_CREDIT_REPORT));
HTCProcessCreditRpt(target,
(HTC_CREDIT_REPORT *)pRecordBuf,
pRecord->Length / (sizeof(HTC_CREDIT_REPORT)),
FromEndpoint);
break;
case HTC_RECORD_LOOKAHEAD:
AR_DEBUG_ASSERT(pRecord->Length >= sizeof(HTC_LOOKAHEAD_REPORT));
pLookAhead = (HTC_LOOKAHEAD_REPORT *)pRecordBuf;
if ((pLookAhead->PreValid == ((~pLookAhead->PostValid) & 0xFF)) &&
(pNextLookAheads != NULL)) {
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,
(" LookAhead Report Found (pre valid:0x%X, post valid:0x%X) \n",
pLookAhead->PreValid,
pLookAhead->PostValid));
/* look ahead bytes are valid, copy them over */
((A_UINT8 *)(&pNextLookAheads[0]))[0] = pLookAhead->LookAhead[0];
((A_UINT8 *)(&pNextLookAheads[0]))[1] = pLookAhead->LookAhead[1];
((A_UINT8 *)(&pNextLookAheads[0]))[2] = pLookAhead->LookAhead[2];
((A_UINT8 *)(&pNextLookAheads[0]))[3] = pLookAhead->LookAhead[3];
if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_RECV)) {
DebugDumpBytes((A_UINT8 *)pNextLookAheads,4,"Next Look Ahead");
}
/* just one normal lookahead */
if (pNumLookAheads != NULL) {
*pNumLookAheads = 1;
}
}
break;
case HTC_RECORD_LOOKAHEAD_BUNDLE:
AR_DEBUG_ASSERT(pRecord->Length >= sizeof(HTC_BUNDLED_LOOKAHEAD_REPORT));
if (pRecord->Length >= sizeof(HTC_BUNDLED_LOOKAHEAD_REPORT) &&
(pNextLookAheads != NULL)) {
HTC_BUNDLED_LOOKAHEAD_REPORT *pBundledLookAheadRpt;
int i;
pBundledLookAheadRpt = (HTC_BUNDLED_LOOKAHEAD_REPORT *)pRecordBuf;
if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_RECV)) {
DebugDumpBytes(pRecordBuf,pRecord->Length,"Bundle LookAhead");
}
if ((pRecord->Length / (sizeof(HTC_BUNDLED_LOOKAHEAD_REPORT))) >
HTC_HOST_MAX_MSG_PER_BUNDLE) {
/* this should never happen, the target restricts the number
* of messages per bundle configured by the host */
A_ASSERT(FALSE);
status = A_EPROTO;
break;
}
for (i = 0; i < (int)(pRecord->Length / (sizeof(HTC_BUNDLED_LOOKAHEAD_REPORT))); i++) {
((A_UINT8 *)(&pNextLookAheads[i]))[0] = pBundledLookAheadRpt->LookAhead[0];
((A_UINT8 *)(&pNextLookAheads[i]))[1] = pBundledLookAheadRpt->LookAhead[1];
((A_UINT8 *)(&pNextLookAheads[i]))[2] = pBundledLookAheadRpt->LookAhead[2];
((A_UINT8 *)(&pNextLookAheads[i]))[3] = pBundledLookAheadRpt->LookAhead[3];
pBundledLookAheadRpt++;
}
if (pNumLookAheads == NULL) {
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("pNumLookAheads is NULL"));
break;
}
*pNumLookAheads = i;
}
break;
default:
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, (" unhandled record: id:%d length:%d \n",
pRecord->RecordID, pRecord->Length));
break;
}
if (A_FAILED(status)) {
break;
}
/* advance buffer past this record for next time around */
pBuffer += pRecord->Length;
Length -= pRecord->Length;
}
if (A_FAILED(status)) {
DebugDumpBytes(pOrigBuffer,origLength,"BAD Recv Trailer");
}
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("-HTCProcessTrailer \n"));
return status;
}
/* process a received message (i.e. strip off header, process any trailer data)
* note : locks must be released when this function is called */
static A_STATUS HTCProcessRecvHeader(HTC_TARGET *target,
HTC_PACKET *pPacket,
A_UINT32 *pNextLookAheads,
int *pNumLookAheads)
{
A_UINT8 temp;
A_UINT8 *pBuf;
A_STATUS status = A_OK;
A_UINT16 payloadLen;
A_UINT32 lookAhead;
pBuf = pPacket->pBuffer;
if (pNumLookAheads != NULL) {
*pNumLookAheads = 0;
}
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("+HTCProcessRecvHeader \n"));
if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_RECV)) {
AR_DEBUG_PRINTBUF(pBuf,pPacket->ActualLength,"HTC Recv PKT");
}
do {
/* note, we cannot assume the alignment of pBuffer, so we use the safe macros to
* retrieve 16 bit fields */
payloadLen = A_GET_UINT16_FIELD(pBuf, HTC_FRAME_HDR, PayloadLen);
((A_UINT8 *)&lookAhead)[0] = pBuf[0];
((A_UINT8 *)&lookAhead)[1] = pBuf[1];
((A_UINT8 *)&lookAhead)[2] = pBuf[2];
((A_UINT8 *)&lookAhead)[3] = pBuf[3];
if (pPacket->PktInfo.AsRx.HTCRxFlags & HTC_RX_PKT_REFRESH_HDR) {
/* refresh expected hdr, since this was unknown at the time we grabbed the packets
* as part of a bundle */
pPacket->PktInfo.AsRx.ExpectedHdr = lookAhead;
/* refresh actual length since we now have the real header */
pPacket->ActualLength = payloadLen + HTC_HDR_LENGTH;
/* validate the actual header that was refreshed */
if (pPacket->ActualLength > pPacket->BufferLength) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("Refreshed HDR payload length (%d) in bundled RECV is invalid (hdr: 0x%X) \n",
payloadLen, lookAhead));
/* limit this to max buffer just to print out some of the buffer */
pPacket->ActualLength = min(pPacket->ActualLength, pPacket->BufferLength);
status = A_EPROTO;
break;
}
if (pPacket->Endpoint != A_GET_UINT8_FIELD(pBuf, HTC_FRAME_HDR, EndpointID)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("Refreshed HDR endpoint (%d) does not match expected endpoint (%d) \n",
A_GET_UINT8_FIELD(pBuf, HTC_FRAME_HDR, EndpointID), pPacket->Endpoint));
status = A_EPROTO;
break;
}
}
if (lookAhead != pPacket->PktInfo.AsRx.ExpectedHdr) {
/* somehow the lookahead that gave us the full read length did not
* reflect the actual header in the pending message */
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("HTCProcessRecvHeader, lookahead mismatch! (pPkt:0x%lX flags:0x%X) \n",
(unsigned long)pPacket, pPacket->PktInfo.AsRx.HTCRxFlags));
#ifdef ATH_DEBUG_MODULE
DebugDumpBytes((A_UINT8 *)&pPacket->PktInfo.AsRx.ExpectedHdr,4,"Expected Message LookAhead");
DebugDumpBytes(pBuf,sizeof(HTC_FRAME_HDR),"Current Frame Header");
#ifdef HTC_CAPTURE_LAST_FRAME
DebugDumpBytes((A_UINT8 *)&target->LastFrameHdr,sizeof(HTC_FRAME_HDR),"Last Frame Header");
if (target->LastTrailerLength != 0) {
DebugDumpBytes(target->LastTrailer,
target->LastTrailerLength,
"Last trailer");
}
#endif
#endif
status = A_EPROTO;
break;
}
/* get flags */
temp = A_GET_UINT8_FIELD(pBuf, HTC_FRAME_HDR, Flags);
if (temp & HTC_FLAGS_RECV_TRAILER) {
/* this packet has a trailer */
/* extract the trailer length in control byte 0 */
temp = A_GET_UINT8_FIELD(pBuf, HTC_FRAME_HDR, ControlBytes[0]);
if ((temp < sizeof(HTC_RECORD_HDR)) || (temp > payloadLen)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("HTCProcessRecvHeader, invalid header (payloadlength should be :%d, CB[0] is:%d) \n",
payloadLen, temp));
status = A_EPROTO;
break;
}
if (pPacket->PktInfo.AsRx.HTCRxFlags & HTC_RX_PKT_IGNORE_LOOKAHEAD) {
/* this packet was fetched as part of an HTC bundle, the embedded lookahead is
* not valid since the next packet may have already been fetched as part of the
* bundle */
pNextLookAheads = NULL;
pNumLookAheads = NULL;
}
/* process trailer data that follows HDR + application payload */
status = HTCProcessTrailer(target,
(pBuf + HTC_HDR_LENGTH + payloadLen - temp),
temp,
pNextLookAheads,
pNumLookAheads,
pPacket->Endpoint);
if (A_FAILED(status)) {
break;
}
#ifdef HTC_CAPTURE_LAST_FRAME
A_MEMCPY(target->LastTrailer, (pBuf + HTC_HDR_LENGTH + payloadLen - temp), temp);
target->LastTrailerLength = temp;
#endif
/* trim length by trailer bytes */
pPacket->ActualLength -= temp;
}
#ifdef HTC_CAPTURE_LAST_FRAME
else {
target->LastTrailerLength = 0;
}
#endif
/* if we get to this point, the packet is good */
/* remove header and adjust length */
pPacket->pBuffer += HTC_HDR_LENGTH;
pPacket->ActualLength -= HTC_HDR_LENGTH;
} while (FALSE);
if (A_FAILED(status)) {
/* dump the whole packet */
DebugDumpBytes(pBuf,pPacket->ActualLength < 256 ? pPacket->ActualLength : 256 ,"BAD HTC Recv PKT");
} else {
#ifdef HTC_CAPTURE_LAST_FRAME
A_MEMCPY(&target->LastFrameHdr,pBuf,sizeof(HTC_FRAME_HDR));
#endif
if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_RECV)) {
if (pPacket->ActualLength > 0) {
AR_DEBUG_PRINTBUF(pPacket->pBuffer,pPacket->ActualLength,"HTC - Application Msg");
}
}
}
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("-HTCProcessRecvHeader \n"));
return status;
}
static INLINE void HTCAsyncRecvCheckMorePackets(HTC_TARGET *target,
A_UINT32 NextLookAheads[],
int NumLookAheads,
A_BOOL CheckMoreMsgs)
{
/* was there a lookahead for the next packet? */
if (NumLookAheads > 0) {
A_STATUS nextStatus;
int fetched = 0;
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,
("HTCAsyncRecvCheckMorePackets - num lookaheads were non-zero : %d \n",
NumLookAheads));
/* force status re-check */
REF_IRQ_STATUS_RECHECK(&target->Device);
/* we have more packets, get the next packet fetch started */
nextStatus = HTCRecvMessagePendingHandler(target, NextLookAheads, NumLookAheads, NULL, &fetched);
if (A_EPROTO == nextStatus) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("Next look ahead from recv header was INVALID\n"));
DebugDumpBytes((A_UINT8 *)NextLookAheads,
NumLookAheads * (sizeof(A_UINT32)),
"BAD lookaheads from lookahead report");
}
if (A_SUCCESS(nextStatus) && !fetched) {
/* we could not fetch any more packets due to resources */
DevAsyncIrqProcessComplete(&target->Device);
}
} else {
if (CheckMoreMsgs) {
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,
("HTCAsyncRecvCheckMorePackets - rechecking for more messages...\n"));
/* if we did not get anything on the look-ahead,
* call device layer to asynchronously re-check for messages. If we can keep the async
* processing going we get better performance. If there is a pending message we will keep processing
* messages asynchronously which should pipeline things nicely */
DevCheckPendingRecvMsgsAsync(&target->Device);
} else {
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("HTCAsyncRecvCheckMorePackets - no check \n"));
}
}
}
/* unload the recv completion queue */
static INLINE void DrainRecvIndicationQueue(HTC_TARGET *target, HTC_ENDPOINT *pEndpoint)
{
HTC_PACKET_QUEUE recvCompletions = { {0} };
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("+DrainRecvIndicationQueue \n"));
INIT_HTC_PACKET_QUEUE(&recvCompletions);
LOCK_HTC_RX(target);
/* increment rx processing count on entry */
pEndpoint->RxProcessCount++;
if (pEndpoint->RxProcessCount > 1) {
pEndpoint->RxProcessCount--;
/* another thread or task is draining the RX completion queue on this endpoint
* that thread will reset the rx processing count when the queue is drained */
UNLOCK_HTC_RX(target);
return;
}
/******* at this point only 1 thread may enter ******/
while (TRUE) {
/* transfer items from main recv queue to the local one so we can release the lock */
HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&recvCompletions, &pEndpoint->RecvIndicationQueue);
if (HTC_QUEUE_EMPTY(&recvCompletions)) {
/* all drained */
break;
}
/* release lock while we do the recv completions
* other threads can now queue more recv completions */
UNLOCK_HTC_RX(target);
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,
("DrainRecvIndicationQueue : completing %d RECV packets \n",
HTC_PACKET_QUEUE_DEPTH(&recvCompletions)));
/* do completion */
DO_RCV_COMPLETION(pEndpoint,&recvCompletions);
/* re-acquire lock to grab some more completions */
LOCK_HTC_RX(target);
}
/* reset count */
pEndpoint->RxProcessCount = 0;
UNLOCK_HTC_RX(target);
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("-DrainRecvIndicationQueue \n"));
}
/* optimization for recv packets, we can indicate a "hint" that there are more
* single-packets to fetch on this endpoint */
#define SET_MORE_RX_PACKET_INDICATION_FLAG(L,N,E,P) \
if ((N) > 0) { SetRxPacketIndicationFlags((L)[0],(E),(P)); }
/* for bundled frames, we can force the flag to indicate there are more packets */
#define FORCE_MORE_RX_PACKET_INDICATION_FLAG(P) \
(P)->PktInfo.AsRx.IndicationFlags |= HTC_RX_FLAGS_INDICATE_MORE_PKTS;
/* note: this function can be called with the RX lock held */
static INLINE void SetRxPacketIndicationFlags(A_UINT32 LookAhead,
HTC_ENDPOINT *pEndpoint,
HTC_PACKET *pPacket)
{
HTC_FRAME_HDR *pHdr = (HTC_FRAME_HDR *)&LookAhead;
/* check to see if the "next" packet is from the same endpoint of the
completing packet */
if (pHdr->EndpointID == pPacket->Endpoint) {
/* check that there is a buffer available to actually fetch it */
if (!HTC_QUEUE_EMPTY(&pEndpoint->RxBuffers)) {
/* provide a hint that there are more RX packets to fetch */
FORCE_MORE_RX_PACKET_INDICATION_FLAG(pPacket);
}
}
}
/* asynchronous completion handler for recv packet fetching, when the device layer
* completes a read request, it will call this completion handler */
void HTCRecvCompleteHandler(void *Context, HTC_PACKET *pPacket)
{
HTC_TARGET *target = (HTC_TARGET *)Context;
HTC_ENDPOINT *pEndpoint;
A_UINT32 nextLookAheads[HTC_HOST_MAX_MSG_PER_BUNDLE];
int numLookAheads = 0;
A_STATUS status;
A_BOOL checkMorePkts = TRUE;
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("+HTCRecvCompleteHandler (pkt:0x%lX, status:%d, ep:%d) \n",
(unsigned long)pPacket, pPacket->Status, pPacket->Endpoint));
A_ASSERT(!IS_DEV_IRQ_PROC_SYNC_MODE(&target->Device));
AR_DEBUG_ASSERT(pPacket->Endpoint < ENDPOINT_MAX);
pEndpoint = &target->EndPoint[pPacket->Endpoint];
pPacket->Completion = NULL;
/* get completion status */
status = pPacket->Status;
do {
if (A_FAILED(status)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("HTCRecvCompleteHandler: request failed (status:%d, ep:%d) \n",
pPacket->Status, pPacket->Endpoint));
break;
}
/* process the header for any trailer data */
status = HTCProcessRecvHeader(target,pPacket,nextLookAheads,&numLookAheads);
if (A_FAILED(status)) {
break;
}
if (pPacket->PktInfo.AsRx.HTCRxFlags & HTC_RX_PKT_IGNORE_LOOKAHEAD) {
/* this packet was part of a bundle that had to be broken up.
* It was fetched one message at a time. There may be other asynchronous reads queued behind this one.
* Do no issue another check for more packets since the last one in the series of requests
* will handle it */
checkMorePkts = FALSE;
}
DUMP_RECV_PKT_INFO(pPacket);
LOCK_HTC_RX(target);
SET_MORE_RX_PACKET_INDICATION_FLAG(nextLookAheads,numLookAheads,pEndpoint,pPacket);
/* we have a good packet, queue it to the completion queue */
HTC_PACKET_ENQUEUE(&pEndpoint->RecvIndicationQueue,pPacket);
HTC_RX_STAT_PROFILE(target,pEndpoint,numLookAheads);
UNLOCK_HTC_RX(target);
/* check for more recv packets before indicating */
HTCAsyncRecvCheckMorePackets(target,nextLookAheads,numLookAheads,checkMorePkts);
} while (FALSE);
if (A_FAILED(status)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("HTCRecvCompleteHandler , message fetch failed (status = %d) \n",
status));
/* recycle this packet */
HTC_RECYCLE_RX_PKT(target, pPacket, pEndpoint);
} else {
/* a good packet was queued, drain the queue */
DrainRecvIndicationQueue(target,pEndpoint);
}
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("-HTCRecvCompleteHandler\n"));
}
/* synchronously wait for a control message from the target,
* This function is used at initialization time ONLY. At init messages
* on ENDPOINT 0 are expected. */
A_STATUS HTCWaitforControlMessage(HTC_TARGET *target, HTC_PACKET **ppControlPacket)
{
A_STATUS status;
A_UINT32 lookAhead;
HTC_PACKET *pPacket = NULL;
HTC_FRAME_HDR *pHdr;
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("+HTCWaitforControlMessage \n"));
do {
*ppControlPacket = NULL;
/* call the polling function to see if we have a message */
status = DevPollMboxMsgRecv(&target->Device,
&lookAhead,
HTC_TARGET_RESPONSE_TIMEOUT);
if (A_FAILED(status)) {
break;
}
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,
("HTCWaitforControlMessage : lookAhead : 0x%X \n", lookAhead));
/* check the lookahead */
pHdr = (HTC_FRAME_HDR *)&lookAhead;
if (pHdr->EndpointID != ENDPOINT_0) {
/* unexpected endpoint number, should be zero */
AR_DEBUG_ASSERT(FALSE);
status = A_EPROTO;
break;
}
if (A_FAILED(status)) {
/* bad message */
AR_DEBUG_ASSERT(FALSE);
status = A_EPROTO;
break;
}
pPacket = HTC_ALLOC_CONTROL_RX(target);
if (pPacket == NULL) {
AR_DEBUG_ASSERT(FALSE);
status = A_NO_MEMORY;
break;
}
pPacket->PktInfo.AsRx.HTCRxFlags = 0;
pPacket->PktInfo.AsRx.ExpectedHdr = lookAhead;
pPacket->ActualLength = pHdr->PayloadLen + HTC_HDR_LENGTH;
if (pPacket->ActualLength > pPacket->BufferLength) {
AR_DEBUG_ASSERT(FALSE);
status = A_EPROTO;
break;
}
/* we want synchronous operation */
pPacket->Completion = NULL;
/* get the message from the device, this will block */
status = HTCIssueRecv(target, pPacket);
if (A_FAILED(status)) {
break;
}
/* process receive header */
status = HTCProcessRecvHeader(target,pPacket,NULL,NULL);
pPacket->Status = status;
if (A_FAILED(status)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("HTCWaitforControlMessage, HTCProcessRecvHeader failed (status = %d) \n",
status));
break;
}
/* give the caller this control message packet, they are responsible to free */
*ppControlPacket = pPacket;
} while (FALSE);
if (A_FAILED(status)) {
if (pPacket != NULL) {
/* cleanup buffer on error */
HTC_FREE_CONTROL_RX(target,pPacket);
}
}
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("-HTCWaitforControlMessage \n"));
return status;
}
static A_STATUS AllocAndPrepareRxPackets(HTC_TARGET *target,
A_UINT32 LookAheads[],
int Messages,
HTC_ENDPOINT *pEndpoint,
HTC_PACKET_QUEUE *pQueue)
{
A_STATUS status = A_OK;
HTC_PACKET *pPacket;
HTC_FRAME_HDR *pHdr;
int i,j;
int numMessages;
int fullLength;
A_BOOL noRecycle;
/* lock RX while we assemble the packet buffers */
LOCK_HTC_RX(target);
for (i = 0; i < Messages; i++) {
pHdr = (HTC_FRAME_HDR *)&LookAheads[i];
if (pHdr->EndpointID >= ENDPOINT_MAX) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Invalid Endpoint in look-ahead: %d \n",pHdr->EndpointID));
/* invalid endpoint */
status = A_EPROTO;
break;
}
if (pHdr->EndpointID != pEndpoint->Id) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Invalid Endpoint in look-ahead: %d should be : %d (index:%d)\n",
pHdr->EndpointID, pEndpoint->Id, i));
/* invalid endpoint */
status = A_EPROTO;
break;
}
if (pHdr->PayloadLen > HTC_MAX_PAYLOAD_LENGTH) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Payload length %d exceeds max HTC : %d !\n",
pHdr->PayloadLen, (A_UINT32)HTC_MAX_PAYLOAD_LENGTH));
status = A_EPROTO;
break;
}
if (0 == pEndpoint->ServiceID) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Endpoint %d is not connected !\n",pHdr->EndpointID));
/* endpoint isn't even connected */
status = A_EPROTO;
break;
}
if ((pHdr->Flags & HTC_FLAGS_RECV_BUNDLE_CNT_MASK) == 0) {
/* HTC header only indicates 1 message to fetch */
numMessages = 1;
} else {
/* HTC header indicates that every packet to follow has the same padded length so that it can
* be optimally fetched as a full bundle */
numMessages = (pHdr->Flags & HTC_FLAGS_RECV_BUNDLE_CNT_MASK) >> HTC_FLAGS_RECV_BUNDLE_CNT_SHIFT;
/* the count doesn't include the starter frame, just a count of frames to follow */
numMessages++;
A_ASSERT(numMessages <= target->MaxMsgPerBundle);
INC_HTC_EP_STAT(pEndpoint, RxBundleIndFromHdr, 1);
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,
("HTC header indicates :%d messages can be fetched as a bundle \n",numMessages));
}
fullLength = DEV_CALC_RECV_PADDED_LEN(&target->Device,pHdr->PayloadLen + sizeof(HTC_FRAME_HDR));
/* get packet buffers for each message, if there was a bundle detected in the header,
* use pHdr as a template to fetch all packets in the bundle */
for (j = 0; j < numMessages; j++) {
/* reset flag, any packets allocated using the RecvAlloc() API cannot be recycled on cleanup,
* they must be explicitly returned */
noRecycle = FALSE;
if (pEndpoint->EpCallBacks.EpRecvAlloc != NULL) {
UNLOCK_HTC_RX(target);
noRecycle = TRUE;
/* user is using a per-packet allocation callback */
pPacket = pEndpoint->EpCallBacks.EpRecvAlloc(pEndpoint->EpCallBacks.pContext,
pEndpoint->Id,
fullLength);
LOCK_HTC_RX(target);
} else if ((pEndpoint->EpCallBacks.EpRecvAllocThresh != NULL) &&
(fullLength > pEndpoint->EpCallBacks.RecvAllocThreshold)) {
INC_HTC_EP_STAT(pEndpoint,RxAllocThreshHit,1);
INC_HTC_EP_STAT(pEndpoint,RxAllocThreshBytes,pHdr->PayloadLen);
/* threshold was hit, call the special recv allocation callback */
UNLOCK_HTC_RX(target);
noRecycle = TRUE;
/* user wants to allocate packets above a certain threshold */
pPacket = pEndpoint->EpCallBacks.EpRecvAllocThresh(pEndpoint->EpCallBacks.pContext,
pEndpoint->Id,
fullLength);
LOCK_HTC_RX(target);
} else {
/* user is using a refill handler that can refill multiple HTC buffers */
/* get a packet from the endpoint recv queue */
pPacket = HTC_PACKET_DEQUEUE(&pEndpoint->RxBuffers);
if (NULL == pPacket) {
/* check for refill handler */
if (pEndpoint->EpCallBacks.EpRecvRefill != NULL) {
UNLOCK_HTC_RX(target);
/* call the re-fill handler */
pEndpoint->EpCallBacks.EpRecvRefill(pEndpoint->EpCallBacks.pContext,
pEndpoint->Id);
LOCK_HTC_RX(target);
/* check if we have more buffers */
pPacket = HTC_PACKET_DEQUEUE(&pEndpoint->RxBuffers);
/* fall through */
}
}
}
if (NULL == pPacket) {
/* this is not an error, we simply need to mark that we are waiting for buffers.*/
target->RecvStateFlags |= HTC_RECV_WAIT_BUFFERS;
target->EpWaitingForBuffers = pEndpoint->Id;
status = A_NO_RESOURCE;
break;
}
AR_DEBUG_ASSERT(pPacket->Endpoint == pEndpoint->Id);
/* clear flags */
pPacket->PktInfo.AsRx.HTCRxFlags = 0;
pPacket->PktInfo.AsRx.IndicationFlags = 0;
pPacket->Status = A_OK;
if (noRecycle) {
/* flag that these packets cannot be recycled, they have to be returned to the
* user */
pPacket->PktInfo.AsRx.HTCRxFlags |= HTC_RX_PKT_NO_RECYCLE;
}
/* add packet to queue (also incase we need to cleanup down below) */
HTC_PACKET_ENQUEUE(pQueue,pPacket);
if (HTC_STOPPING(target)) {
status = A_ECANCELED;
break;
}
/* make sure this message can fit in the endpoint buffer */
if ((A_UINT32)fullLength > pPacket->BufferLength) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("Payload Length Error : header reports payload of: %d (%d) endpoint buffer size: %d \n",
pHdr->PayloadLen, fullLength, pPacket->BufferLength));
status = A_EPROTO;
break;
}
if (j > 0) {
/* for messages fetched in a bundle the expected lookahead is unknown since we
* are only using the lookahead of the first packet as a template of what to
* expect for lengths */
/* flag that once we get the real HTC header we need to refesh the information */
pPacket->PktInfo.AsRx.HTCRxFlags |= HTC_RX_PKT_REFRESH_HDR;
/* set it to something invalid */
pPacket->PktInfo.AsRx.ExpectedHdr = 0xFFFFFFFF;
} else {
pPacket->PktInfo.AsRx.ExpectedHdr = LookAheads[i]; /* set expected look ahead */
}
/* set the amount of data to fetch */
pPacket->ActualLength = pHdr->PayloadLen + HTC_HDR_LENGTH;
}
if (A_FAILED(status)) {
if (A_NO_RESOURCE == status) {
/* this is actually okay */
status = A_OK;
}
break;
}
}
UNLOCK_HTC_RX(target);
if (A_FAILED(status)) {
while (!HTC_QUEUE_EMPTY(pQueue)) {
pPacket = HTC_PACKET_DEQUEUE(pQueue);
if(pPacket == NULL)
break;
/* recycle all allocated packets */
HTC_RECYCLE_RX_PKT(target,pPacket,&target->EndPoint[pPacket->Endpoint]);
}
}
return status;
}
static void HTCAsyncRecvScatterCompletion(HIF_SCATTER_REQ *pScatterReq)
{
int i;
HTC_PACKET *pPacket;
HTC_ENDPOINT *pEndpoint;
A_UINT32 lookAheads[HTC_HOST_MAX_MSG_PER_BUNDLE];
int numLookAheads = 0;
HTC_TARGET *target = (HTC_TARGET *)pScatterReq->Context;
A_STATUS status;
A_BOOL partialBundle = FALSE;
HTC_PACKET_QUEUE localRecvQueue = { {0} };
A_BOOL procError = FALSE;
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("+HTCAsyncRecvScatterCompletion TotLen: %d Entries: %d\n",
pScatterReq->TotalLength, pScatterReq->ValidScatterEntries));
A_ASSERT(!IS_DEV_IRQ_PROC_SYNC_MODE(&target->Device));
if (A_FAILED(pScatterReq->CompletionStatus)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("** Recv Scatter Request Failed: %d \n",pScatterReq->CompletionStatus));
}
if (pScatterReq->CallerFlags & HTC_SCATTER_REQ_FLAGS_PARTIAL_BUNDLE) {
partialBundle = TRUE;
}
DEV_FINISH_SCATTER_OPERATION(pScatterReq);
INIT_HTC_PACKET_QUEUE(&localRecvQueue);
pPacket = (HTC_PACKET *)pScatterReq->ScatterList[0].pCallerContexts[0];
/* note: all packets in a scatter req are for the same endpoint ! */
pEndpoint = &target->EndPoint[pPacket->Endpoint];
/* walk through the scatter list and process */
/* **** NOTE: DO NOT HOLD ANY LOCKS here, HTCProcessRecvHeader can take the TX lock
* as it processes credit reports */
for (i = 0; i < pScatterReq->ValidScatterEntries; i++) {
pPacket = (HTC_PACKET *)pScatterReq->ScatterList[i].pCallerContexts[0];
A_ASSERT(pPacket != NULL);
if (pPacket == NULL)
return;
/* reset count, we are only interested in the look ahead in the last packet when we
* break out of this loop */
numLookAheads = 0;
if (A_SUCCESS(pScatterReq->CompletionStatus)) {
/* process header for each of the recv packets */
status = HTCProcessRecvHeader(target,pPacket,lookAheads,&numLookAheads);
} else {
status = A_ERROR;
}
if (A_SUCCESS(status)) {
#ifdef HTC_EP_STAT_PROFILING
LOCK_HTC_RX(target);
HTC_RX_STAT_PROFILE(target,pEndpoint,numLookAheads);
INC_HTC_EP_STAT(pEndpoint, RxPacketsBundled, 1);
UNLOCK_HTC_RX(target);
#endif
if (i == (pScatterReq->ValidScatterEntries - 1)) {
/* last packet's more packets flag is set based on the lookahead */
SET_MORE_RX_PACKET_INDICATION_FLAG(lookAheads,numLookAheads,pEndpoint,pPacket);
} else {
/* packets in a bundle automatically have this flag set */
FORCE_MORE_RX_PACKET_INDICATION_FLAG(pPacket);
}
DUMP_RECV_PKT_INFO(pPacket);
/* since we can't hold a lock in this loop, we insert into our local recv queue for
* storage until we can transfer them to the recv completion queue */
HTC_PACKET_ENQUEUE(&localRecvQueue,pPacket);
} else {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,(" Recv packet scatter entry %d failed (out of %d) \n",
i, pScatterReq->ValidScatterEntries));
/* recycle failed recv */
HTC_RECYCLE_RX_PKT(target, pPacket, pEndpoint);
/* set flag and continue processing the remaining scatter entries */
procError = TRUE;
}
}
/* free scatter request */
DEV_FREE_SCATTER_REQ(&target->Device,pScatterReq);
LOCK_HTC_RX(target);
/* transfer the packets in the local recv queue to the recv completion queue */
HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&pEndpoint->RecvIndicationQueue, &localRecvQueue);
UNLOCK_HTC_RX(target);
if (!procError) {
/* pipeline the next check (asynchronously) for more packets */
HTCAsyncRecvCheckMorePackets(target,
lookAheads,
numLookAheads,
partialBundle ? FALSE : TRUE);
}
/* now drain the indication queue */
DrainRecvIndicationQueue(target,pEndpoint);
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("-HTCAsyncRecvScatterCompletion \n"));
}
static A_STATUS HTCIssueRecvPacketBundle(HTC_TARGET *target,
HTC_PACKET_QUEUE *pRecvPktQueue,
HTC_PACKET_QUEUE *pSyncCompletionQueue,
int *pNumPacketsFetched,
A_BOOL PartialBundle)
{
A_STATUS status = A_OK;
HIF_SCATTER_REQ *pScatterReq;
int i, totalLength;
int pktsToScatter;
HTC_PACKET *pPacket;
A_BOOL asyncMode = (pSyncCompletionQueue == NULL) ? TRUE : FALSE;
int scatterSpaceRemaining = DEV_GET_MAX_BUNDLE_RECV_LENGTH(&target->Device);
pktsToScatter = HTC_PACKET_QUEUE_DEPTH(pRecvPktQueue);
pktsToScatter = min(pktsToScatter, target->MaxMsgPerBundle);
if ((HTC_PACKET_QUEUE_DEPTH(pRecvPktQueue) - pktsToScatter) > 0) {
/* we were forced to split this bundle receive operation
* all packets in this partial bundle must have their lookaheads ignored */
PartialBundle = TRUE;
/* this would only happen if the target ignored our max bundle limit */
AR_DEBUG_PRINTF(ATH_DEBUG_WARN,
("HTCIssueRecvPacketBundle : partial bundle detected num:%d , %d \n",
HTC_PACKET_QUEUE_DEPTH(pRecvPktQueue), pktsToScatter));
}
totalLength = 0;
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("+HTCIssueRecvPacketBundle (Numpackets: %d , actual : %d) \n",
HTC_PACKET_QUEUE_DEPTH(pRecvPktQueue), pktsToScatter));
do {
pScatterReq = DEV_ALLOC_SCATTER_REQ(&target->Device);
if (pScatterReq == NULL) {
/* no scatter resources left, just let caller handle it the legacy way */
break;
}
pScatterReq->CallerFlags = 0;
if (PartialBundle) {
/* mark that this is a partial bundle, this has special ramifications to the
* scatter completion routine */
pScatterReq->CallerFlags |= HTC_SCATTER_REQ_FLAGS_PARTIAL_BUNDLE;
}
/* convert HTC packets to scatter list */
for (i = 0; i < pktsToScatter; i++) {
int paddedLength;
pPacket = HTC_PACKET_DEQUEUE(pRecvPktQueue);
A_ASSERT(pPacket != NULL);
if (pPacket == NULL)
return A_ERROR;
paddedLength = DEV_CALC_RECV_PADDED_LEN(&target->Device, pPacket->ActualLength);
if ((scatterSpaceRemaining - paddedLength) < 0) {
/* exceeds what we can transfer, put the packet back */
HTC_PACKET_ENQUEUE_TO_HEAD(pRecvPktQueue,pPacket);
break;
}
scatterSpaceRemaining -= paddedLength;
if (PartialBundle || (i < (pktsToScatter - 1))) {
/* packet 0..n-1 cannot be checked for look-aheads since we are fetching a bundle
* the last packet however can have it's lookahead used */
pPacket->PktInfo.AsRx.HTCRxFlags |= HTC_RX_PKT_IGNORE_LOOKAHEAD;
}
/* note: 1 HTC packet per scatter entry */
/* setup packet into */
pScatterReq->ScatterList[i].pBuffer = pPacket->pBuffer;
pScatterReq->ScatterList[i].Length = paddedLength;
pPacket->PktInfo.AsRx.HTCRxFlags |= HTC_RX_PKT_PART_OF_BUNDLE;
if (asyncMode) {
/* save HTC packet for async completion routine */
pScatterReq->ScatterList[i].pCallerContexts[0] = pPacket;
} else {
/* queue to caller's sync completion queue, caller will unload this when we return */
HTC_PACKET_ENQUEUE(pSyncCompletionQueue,pPacket);
}
A_ASSERT(pScatterReq->ScatterList[i].Length);
totalLength += pScatterReq->ScatterList[i].Length;
}
pScatterReq->TotalLength = totalLength;
pScatterReq->ValidScatterEntries = i;
if (asyncMode) {
pScatterReq->CompletionRoutine = HTCAsyncRecvScatterCompletion;
pScatterReq->Context = target;
}
status = DevSubmitScatterRequest(&target->Device, pScatterReq, DEV_SCATTER_READ, asyncMode);
if (A_SUCCESS(status)) {
*pNumPacketsFetched = i;
}
if (!asyncMode) {
/* free scatter request */
DEV_FREE_SCATTER_REQ(&target->Device, pScatterReq);
}
} while (FALSE);
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("-HTCIssueRecvPacketBundle (status:%d) (fetched:%d) \n",
status,*pNumPacketsFetched));
return status;
}
static INLINE void CheckRecvWaterMark(HTC_ENDPOINT *pEndpoint)
{
/* see if endpoint is using a refill watermark
* ** no need to use a lock here, since we are only inspecting...
* caller may must not hold locks when calling this function */
if (pEndpoint->EpCallBacks.RecvRefillWaterMark > 0) {
if (HTC_PACKET_QUEUE_DEPTH(&pEndpoint->RxBuffers) < pEndpoint->EpCallBacks.RecvRefillWaterMark) {
/* call the re-fill handler before we continue */
pEndpoint->EpCallBacks.EpRecvRefill(pEndpoint->EpCallBacks.pContext,
pEndpoint->Id);
}
}
}
/* callback when device layer or lookahead report parsing detects a pending message */
A_STATUS HTCRecvMessagePendingHandler(void *Context, A_UINT32 MsgLookAheads[], int NumLookAheads, A_BOOL *pAsyncProc, int *pNumPktsFetched)
{
HTC_TARGET *target = (HTC_TARGET *)Context;
A_STATUS status = A_OK;
HTC_PACKET *pPacket;
HTC_ENDPOINT *pEndpoint;
A_BOOL asyncProc = FALSE;
A_UINT32 lookAheads[HTC_HOST_MAX_MSG_PER_BUNDLE];
int pktsFetched;
HTC_PACKET_QUEUE recvPktQueue = { {0} };
HTC_PACKET_QUEUE syncCompletedPktsQueue = { {0} };
A_BOOL partialBundle;
HTC_ENDPOINT_ID id;
int totalFetched = 0;
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("+HTCRecvMessagePendingHandler NumLookAheads: %d \n",NumLookAheads));
if (pNumPktsFetched != NULL) {
*pNumPktsFetched = 0;
}
if (IS_DEV_IRQ_PROCESSING_ASYNC_ALLOWED(&target->Device)) {
/* We use async mode to get the packets if the device layer supports it.
* The device layer interfaces with HIF in which HIF may have restrictions on
* how interrupts are processed */
asyncProc = TRUE;
}
if (pAsyncProc != NULL) {
/* indicate to caller how we decided to process this */
*pAsyncProc = asyncProc;
}
if (NumLookAheads > HTC_HOST_MAX_MSG_PER_BUNDLE) {
A_ASSERT(FALSE);
return A_EPROTO;
}
/* on first entry copy the lookaheads into our temp array for processing */
A_MEMCPY(lookAheads, MsgLookAheads, (sizeof(A_UINT32)) * NumLookAheads);
while (TRUE) {
/* reset packets queues */
INIT_HTC_PACKET_QUEUE(&recvPktQueue);
INIT_HTC_PACKET_QUEUE(&syncCompletedPktsQueue);
if (NumLookAheads > HTC_HOST_MAX_MSG_PER_BUNDLE) {
status = A_EPROTO;
A_ASSERT(FALSE);
break;
}
/* first lookahead sets the expected endpoint IDs for all packets in a bundle */
id = ((HTC_FRAME_HDR *)&lookAheads[0])->EndpointID;
pEndpoint = &target->EndPoint[id];
if (id >= ENDPOINT_MAX) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("MsgPend, Invalid Endpoint in look-ahead: %d \n",id));
status = A_EPROTO;
break;
}
/* try to allocate as many HTC RX packets indicated by the lookaheads
* these packets are stored in the recvPkt queue */
status = AllocAndPrepareRxPackets(target,
lookAheads,
NumLookAheads,
pEndpoint,
&recvPktQueue);
if (A_FAILED(status)) {
break;
}
if (HTC_PACKET_QUEUE_DEPTH(&recvPktQueue) >= 2) {
/* a recv bundle was detected, force IRQ status re-check again */
REF_IRQ_STATUS_RECHECK(&target->Device);
}
totalFetched += HTC_PACKET_QUEUE_DEPTH(&recvPktQueue);
/* we've got packet buffers for all we can currently fetch,
* this count is not valid anymore */
NumLookAheads = 0;
partialBundle = FALSE;
/* now go fetch the list of HTC packets */
while (!HTC_QUEUE_EMPTY(&recvPktQueue)) {
pktsFetched = 0;
if (target->RecvBundlingEnabled && (HTC_PACKET_QUEUE_DEPTH(&recvPktQueue) > 1)) {
/* there are enough packets to attempt a bundle transfer and recv bundling is allowed */
status = HTCIssueRecvPacketBundle(target,
&recvPktQueue,
asyncProc ? NULL : &syncCompletedPktsQueue,
&pktsFetched,
partialBundle);
if (A_FAILED(status)) {
break;
}
if (HTC_PACKET_QUEUE_DEPTH(&recvPktQueue) != 0) {
/* we couldn't fetch all packets at one time, this creates a broken
* bundle */
partialBundle = TRUE;
}
}
/* see if the previous operation fetched any packets using bundling */
if (0 == pktsFetched) {
/* dequeue one packet */
pPacket = HTC_PACKET_DEQUEUE(&recvPktQueue);
A_ASSERT(pPacket != NULL);
if (pPacket == NULL)
break;
if (asyncProc) {
/* we use async mode to get the packet if the device layer supports it
* set our callback and context */
pPacket->Completion = HTCRecvCompleteHandler;
pPacket->pContext = target;
} else {
/* fully synchronous */
pPacket->Completion = NULL;
}
if (HTC_PACKET_QUEUE_DEPTH(&recvPktQueue) > 0) {
/* lookaheads in all packets except the last one in the bundle must be ignored */
pPacket->PktInfo.AsRx.HTCRxFlags |= HTC_RX_PKT_IGNORE_LOOKAHEAD;
}
/* go fetch the packet */
status = HTCIssueRecv(target, pPacket);
if (A_FAILED(status)) {
break;
}
if (!asyncProc) {
/* sent synchronously, queue this packet for synchronous completion */
HTC_PACKET_ENQUEUE(&syncCompletedPktsQueue,pPacket);
}
}
}
if (A_SUCCESS(status)) {
CheckRecvWaterMark(pEndpoint);
}
if (asyncProc) {
/* we did this asynchronously so we can get out of the loop, the asynch processing
* creates a chain of requests to continue processing pending messages in the
* context of callbacks */
break;
}
/* synchronous handling */
if (target->Device.DSRCanYield) {
/* for the SYNC case, increment count that tracks when the DSR should yield */
target->Device.CurrentDSRRecvCount++;
}
/* in the sync case, all packet buffers are now filled,
* we can process each packet, check lookaheads and then repeat */
/* unload sync completion queue */
while (!HTC_QUEUE_EMPTY(&syncCompletedPktsQueue)) {
HTC_PACKET_QUEUE container;
pPacket = HTC_PACKET_DEQUEUE(&syncCompletedPktsQueue);
A_ASSERT(pPacket != NULL);
if (pPacket == NULL)
break;
pEndpoint = &target->EndPoint[pPacket->Endpoint];
/* reset count on each iteration, we are only interested in the last packet's lookahead
* information when we break out of this loop */
NumLookAheads = 0;
/* process header for each of the recv packets
* note: the lookahead of the last packet is useful for us to continue in this loop */
status = HTCProcessRecvHeader(target,pPacket,lookAheads,&NumLookAheads);
if (A_FAILED(status)) {
break;
}
if (HTC_QUEUE_EMPTY(&syncCompletedPktsQueue)) {
/* last packet's more packets flag is set based on the lookahead */
SET_MORE_RX_PACKET_INDICATION_FLAG(lookAheads,NumLookAheads,pEndpoint,pPacket);
} else {
/* packets in a bundle automatically have this flag set */
FORCE_MORE_RX_PACKET_INDICATION_FLAG(pPacket);
}
/* good packet, indicate it */
HTC_RX_STAT_PROFILE(target,pEndpoint,NumLookAheads);
if (pPacket->PktInfo.AsRx.HTCRxFlags & HTC_RX_PKT_PART_OF_BUNDLE) {
INC_HTC_EP_STAT(pEndpoint, RxPacketsBundled, 1);
}
INIT_HTC_PACKET_QUEUE_AND_ADD(&container,pPacket);
DO_RCV_COMPLETION(pEndpoint,&container);
}
if (A_FAILED(status)) {
break;
}
if (NumLookAheads == 0) {
/* no more look aheads */
break;
}
/* when we process recv synchronously we need to check if we should yield and stop
* fetching more packets indicated by the embedded lookaheads */
if (target->Device.DSRCanYield) {
if (DEV_CHECK_RECV_YIELD(&target->Device)) {
/* break out, don't fetch any more packets */
break;
}
}
/* check whether other OS contexts have queued any WMI command/data for WLAN.
* This check is needed only if WLAN Tx and Rx happens in same thread context */
A_CHECK_DRV_TX();
/* for SYNCH processing, if we get here, we are running through the loop again due to a detected lookahead.
* Set flag that we should re-check IRQ status registers again before leaving IRQ processing,
* this can net better performance in high throughput situations */
REF_IRQ_STATUS_RECHECK(&target->Device);
}
if (A_FAILED(status)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
("Failed to get pending recv messages (%d) \n",status));
/* cleanup any packets we allocated but didn't use to actually fetch any packets */
while (!HTC_QUEUE_EMPTY(&recvPktQueue)) {
pPacket = HTC_PACKET_DEQUEUE(&recvPktQueue);
if(pPacket == NULL)
break;
/* clean up packets */
HTC_RECYCLE_RX_PKT(target, pPacket, &target->EndPoint[pPacket->Endpoint]);
}
/* cleanup any packets in sync completion queue */
while (!HTC_QUEUE_EMPTY(&syncCompletedPktsQueue)) {
pPacket = HTC_PACKET_DEQUEUE(&syncCompletedPktsQueue);
if (pPacket == NULL)
break;
/* clean up packets */
HTC_RECYCLE_RX_PKT(target, pPacket, &target->EndPoint[pPacket->Endpoint]);
}
if (HTC_STOPPING(target)) {
AR_DEBUG_PRINTF(ATH_DEBUG_WARN,
(" Host is going to stop. blocking receiver for HTCStop.. \n"));
DevStopRecv(&target->Device, asyncProc ? DEV_STOP_RECV_ASYNC : DEV_STOP_RECV_SYNC);
}
}
/* before leaving, check to see if host ran out of buffers and needs to stop the
* receiver */
if (target->RecvStateFlags & HTC_RECV_WAIT_BUFFERS) {
AR_DEBUG_PRINTF(ATH_DEBUG_WARN,
(" Host has no RX buffers, blocking receiver to prevent overrun.. \n"));
/* try to stop receive at the device layer */
DevStopRecv(&target->Device, asyncProc ? DEV_STOP_RECV_ASYNC : DEV_STOP_RECV_SYNC);
}
if (pNumPktsFetched != NULL) {
*pNumPktsFetched = totalFetched;
}
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("-HTCRecvMessagePendingHandler \n"));
return status;
}
A_STATUS HTCAddReceivePktMultiple(HTC_HANDLE HTCHandle, HTC_PACKET_QUEUE *pPktQueue)
{
HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
HTC_ENDPOINT *pEndpoint;
A_BOOL unblockRecv = FALSE;
A_STATUS status = A_OK;
HTC_PACKET *pFirstPacket;
pFirstPacket = HTC_GET_PKT_AT_HEAD(pPktQueue);
if (NULL == pFirstPacket) {
A_ASSERT(FALSE);
return A_EINVAL;
}
AR_DEBUG_ASSERT(pFirstPacket->Endpoint < ENDPOINT_MAX);
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,
("+- HTCAddReceivePktMultiple : endPointId: %d, cnt:%d, length: %d\n",
pFirstPacket->Endpoint,
HTC_PACKET_QUEUE_DEPTH(pPktQueue),
pFirstPacket->BufferLength));
do {
pEndpoint = &target->EndPoint[pFirstPacket->Endpoint];
LOCK_HTC_RX(target);
if (HTC_STOPPING(target)) {
HTC_PACKET *pPacket;
UNLOCK_HTC_RX(target);
/* walk through queue and mark each one canceled */
HTC_PACKET_QUEUE_ITERATE_ALLOW_REMOVE(pPktQueue,pPacket) {
pPacket->Status = A_ECANCELED;
} HTC_PACKET_QUEUE_ITERATE_END;
DO_RCV_COMPLETION(pEndpoint,pPktQueue);
break;
}
/* store receive packets */
HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&pEndpoint->RxBuffers, pPktQueue);
/* check if we are blocked waiting for a new buffer */
if (target->RecvStateFlags & HTC_RECV_WAIT_BUFFERS) {
if (target->EpWaitingForBuffers == pFirstPacket->Endpoint) {
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,(" receiver was blocked on ep:%d, unblocking.. \n",
target->EpWaitingForBuffers));
target->RecvStateFlags &= ~HTC_RECV_WAIT_BUFFERS;
target->EpWaitingForBuffers = ENDPOINT_MAX;
unblockRecv = TRUE;
}
}
UNLOCK_HTC_RX(target);
if (unblockRecv && !HTC_STOPPING(target)) {
/* TODO : implement a buffer threshold count? */
DevEnableRecv(&target->Device,DEV_ENABLE_RECV_SYNC);
}
} while (FALSE);
return status;
}
/* Makes a buffer available to the HTC module */
A_STATUS HTCAddReceivePkt(HTC_HANDLE HTCHandle, HTC_PACKET *pPacket)
{
HTC_PACKET_QUEUE queue = { {0} };
INIT_HTC_PACKET_QUEUE_AND_ADD(&queue,pPacket);
return HTCAddReceivePktMultiple(HTCHandle, &queue);
}
void HTCUnblockRecv(HTC_HANDLE HTCHandle)
{
HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
A_BOOL unblockRecv = FALSE;
LOCK_HTC_RX(target);
/* check if we are blocked waiting for a new buffer */
if (target->RecvStateFlags & HTC_RECV_WAIT_BUFFERS) {
AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("HTCUnblockRx : receiver was blocked on ep:%d, unblocking.. \n",
target->EpWaitingForBuffers));
target->RecvStateFlags &= ~HTC_RECV_WAIT_BUFFERS;
target->EpWaitingForBuffers = ENDPOINT_MAX;
unblockRecv = TRUE;
}
UNLOCK_HTC_RX(target);
if (unblockRecv && !HTC_STOPPING(target)) {
/* re-enable */
DevEnableRecv(&target->Device,DEV_ENABLE_RECV_ASYNC);
}
}
static void HTCFlushRxQueue(HTC_TARGET *target, HTC_ENDPOINT *pEndpoint, HTC_PACKET_QUEUE *pQueue)
{
HTC_PACKET *pPacket;
HTC_PACKET_QUEUE container = { {0} };
LOCK_HTC_RX(target);
while (1) {
pPacket = HTC_PACKET_DEQUEUE(pQueue);
if (NULL == pPacket) {
break;
}
UNLOCK_HTC_RX(target);
pPacket->Status = A_ECANCELED;
pPacket->ActualLength = 0;
AR_DEBUG_PRINTF(ATH_DEBUG_RECV, (" Flushing RX packet:0x%lX, length:%d, ep:%d \n",
(unsigned long)pPacket, pPacket->BufferLength, pPacket->Endpoint));
INIT_HTC_PACKET_QUEUE_AND_ADD(&container,pPacket);
/* give the packet back */
DO_RCV_COMPLETION(pEndpoint,&container);
LOCK_HTC_RX(target);
}
UNLOCK_HTC_RX(target);
}
static void HTCFlushEndpointRX(HTC_TARGET *target, HTC_ENDPOINT *pEndpoint)
{
/* flush any recv indications not already made */
HTCFlushRxQueue(target,pEndpoint,&pEndpoint->RecvIndicationQueue);
/* flush any rx buffers */
HTCFlushRxQueue(target,pEndpoint,&pEndpoint->RxBuffers);
}
void HTCFlushRecvBuffers(HTC_TARGET *target)
{
HTC_ENDPOINT *pEndpoint;
int i;
for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) {
pEndpoint = &target->EndPoint[i];
if (pEndpoint->ServiceID == 0) {
/* not in use.. */
continue;
}
HTCFlushEndpointRX(target,pEndpoint);
}
}
void HTCEnableRecv(HTC_HANDLE HTCHandle)
{
HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
if (!HTC_STOPPING(target)) {
/* re-enable */
DevEnableRecv(&target->Device,DEV_ENABLE_RECV_SYNC);
}
}
void HTCDisableRecv(HTC_HANDLE HTCHandle)
{
HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
if (!HTC_STOPPING(target)) {
/* disable */
DevStopRecv(&target->Device,DEV_ENABLE_RECV_SYNC);
}
}
int HTCGetNumRecvBuffers(HTC_HANDLE HTCHandle,
HTC_ENDPOINT_ID Endpoint)
{
HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
return HTC_PACKET_QUEUE_DEPTH(&(target->EndPoint[Endpoint].RxBuffers));
}
A_STATUS HTCWaitForPendingRecv(HTC_HANDLE HTCHandle,
A_UINT32 TimeoutInMs,
A_BOOL *pbIsRecvPending)
{
A_STATUS status = A_OK;
HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
status = DevWaitForPendingRecv(&target->Device,
TimeoutInMs,
pbIsRecvPending);
return status;
}
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