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author | Lars-Peter Clausen <lars@metafoo.de> | 2009-05-18 17:55:41 +0000 |
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committer | Lars-Peter Clausen <lars@metafoo.de> | 2009-05-18 17:55:41 +0000 |
commit | f5affd4f36d839d706b02f1ffb69e0cf70c4140c (patch) | |
tree | 105a7093a2f5989136da5fe7128d6d95a3b9cad4 /target/linux/s3c24xx/files-2.6.30/drivers/ar6000/htc/htc_recv.c | |
parent | 267af10b33745d098198ad9c1d2b5ab69efb128f (diff) | |
download | upstream-f5affd4f36d839d706b02f1ffb69e0cf70c4140c.tar.gz upstream-f5affd4f36d839d706b02f1ffb69e0cf70c4140c.tar.bz2 upstream-f5affd4f36d839d706b02f1ffb69e0cf70c4140c.zip |
bump to 2.6.30-rc6
SVN-Revision: 15918
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.30/drivers/ar6000/htc/htc_recv.c')
-rw-r--r-- | target/linux/s3c24xx/files-2.6.30/drivers/ar6000/htc/htc_recv.c | 703 |
1 files changed, 703 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/ar6000/htc/htc_recv.c b/target/linux/s3c24xx/files-2.6.30/drivers/ar6000/htc/htc_recv.c new file mode 100644 index 0000000000..4be2b0833c --- /dev/null +++ b/target/linux/s3c24xx/files-2.6.30/drivers/ar6000/htc/htc_recv.c @@ -0,0 +1,703 @@ +/* + * + * Copyright (c) 2007 Atheros Communications Inc. + * All rights reserved. + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation; + * + * Software distributed under the License is distributed on an "AS + * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or + * implied. See the License for the specific language governing + * rights and limitations under the License. + * + * + * + */ + +#include "htc_internal.h" + +#define HTCIssueRecv(t, p) \ + DevRecvPacket(&(t)->Device, \ + (p), \ + (p)->ActualLength) + +#define DO_RCV_COMPLETION(t,p,e) \ +{ \ + if ((p)->ActualLength > 0) { \ + AR_DEBUG_PRINTF(ATH_DEBUG_RECV, (" completing packet 0x%X (%d bytes) on ep : %d \n", \ + (A_UINT32)(p), (p)->ActualLength, (p)->Endpoint)); \ + (e)->EpCallBacks.EpRecv((e)->EpCallBacks.pContext, \ + (p)); \ + } else { \ + AR_DEBUG_PRINTF(ATH_DEBUG_RECV, (" recycling empty packet \n")); \ + HTC_RECYCLE_RX_PKT((t), (p)); \ + } \ +} + +#ifdef HTC_EP_STAT_PROFILING +#define HTC_RX_STAT_PROFILE(t,ep,lookAhead) \ +{ \ + LOCK_HTC_RX((t)); \ + INC_HTC_EP_STAT((ep), RxReceived, 1); \ + if ((lookAhead) != 0) { \ + INC_HTC_EP_STAT((ep), RxLookAheads, 1); \ + } \ + UNLOCK_HTC_RX((t)); \ +} +#else +#define HTC_RX_STAT_PROFILE(t,ep,lookAhead) +#endif + +static INLINE A_STATUS HTCProcessTrailer(HTC_TARGET *target, + A_UINT8 *pBuffer, + int Length, + A_UINT32 *pNextLookAhead, + 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)) && + (pNextLookAhead != 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 *)pNextLookAhead)[0] = pLookAhead->LookAhead[0]; + ((A_UINT8 *)pNextLookAhead)[1] = pLookAhead->LookAhead[1]; + ((A_UINT8 *)pNextLookAhead)[2] = pLookAhead->LookAhead[2]; + ((A_UINT8 *)pNextLookAhead)[3] = pLookAhead->LookAhead[3]; + + if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_RECV)) { + DebugDumpBytes((A_UINT8 *)pNextLookAhead,4,"Next Look Ahead"); + } + } + 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 *pNextLookAhead) +{ + A_UINT8 temp; + A_UINT8 *pBuf; + A_STATUS status = A_OK; + A_UINT16 payloadLen; + A_UINT32 lookAhead; + + pBuf = pPacket->pBuffer; + + 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 (lookAhead != pPacket->HTCReserved) { + /* 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! \n")); + DebugDumpBytes((A_UINT8 *)&pPacket->HTCReserved,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 + 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; + } + + /* process trailer data that follows HDR + application payload */ + status = HTCProcessTrailer(target, + (pBuf + HTC_HDR_LENGTH + payloadLen - temp), + temp, + pNextLookAhead, + 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,"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; +} + +/* 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 nextLookAhead = 0; + A_STATUS status; + + AR_DEBUG_PRINTF(ATH_DEBUG_RECV, ("+HTCRecvCompleteHandler (status:%d, ep:%d) \n", + pPacket->Status, pPacket->Endpoint)); + + 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,&nextLookAhead); + + if (A_FAILED(status)) { + break; + } + /* was there a lookahead for the next packet? */ + if (nextLookAhead != 0) { + A_STATUS nextStatus; + AR_DEBUG_PRINTF(ATH_DEBUG_RECV, + ("HTCRecvCompleteHandler - next look ahead was non-zero : 0x%X \n", + nextLookAhead)); + /* we have another packet, get the next packet fetch started (pipelined) before + * we call into the endpoint's callback, this will start another async request */ + nextStatus = HTCRecvMessagePendingHandler(target,nextLookAhead,NULL); + if (A_EPROTO == nextStatus) { + AR_DEBUG_PRINTF(ATH_DEBUG_ERR, + ("Next look ahead from recv header was INVALID\n")); + DebugDumpBytes((A_UINT8 *)&nextLookAhead, + 4, + "BAD lookahead from lookahead report"); + } + } else { + AR_DEBUG_PRINTF(ATH_DEBUG_RECV, + ("HTCRecvCompleteHandler - 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); + } + + HTC_RX_STAT_PROFILE(target,pEndpoint,nextLookAhead); + DO_RCV_COMPLETION(target,pPacket,pEndpoint); + + } while (FALSE); + + if (A_FAILED(status)) { + AR_DEBUG_PRINTF(ATH_DEBUG_ERR, + ("HTCRecvCompleteHandler , message fetch failed (status = %d) \n", + status)); + /* recyle this packet */ + HTC_RECYCLE_RX_PKT(target, pPacket); + } + + 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->HTCReserved = 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); + + 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; +} + +/* callback when device layer or lookahead report parsing detects a pending message */ +A_STATUS HTCRecvMessagePendingHandler(void *Context, A_UINT32 LookAhead, A_BOOL *pAsyncProc) +{ + HTC_TARGET *target = (HTC_TARGET *)Context; + A_STATUS status = A_OK; + HTC_PACKET *pPacket = NULL; + HTC_FRAME_HDR *pHdr; + HTC_ENDPOINT *pEndpoint; + A_BOOL asyncProc = FALSE; + + AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("+HTCRecvMessagePendingHandler LookAhead:0x%X \n",LookAhead)); + + 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; + } + + while (TRUE) { + + pHdr = (HTC_FRAME_HDR *)&LookAhead; + + 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->PayloadLen > HTC_MAX_PAYLOAD_LENGTH) { + AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Payload length %d exceeds max HTC : %d !\n", + pHdr->PayloadLen, HTC_MAX_PAYLOAD_LENGTH)); + status = A_EPROTO; + break; + } + + pEndpoint = &target->EndPoint[pHdr->EndpointID]; + + 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; + } + + /* lock RX to get a buffer */ + LOCK_HTC_RX(target); + + /* 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, + pHdr->EndpointID); + 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->HTCStateFlags |= HTC_STATE_WAIT_BUFFERS; + target->EpWaitingForBuffers = pHdr->EndpointID; + status = A_NO_MEMORY; + } + + UNLOCK_HTC_RX(target); + + if (A_FAILED(status)) { + /* no buffers */ + break; + } + + AR_DEBUG_ASSERT(pPacket->Endpoint == pHdr->EndpointID); + + /* make sure this message can fit in the endpoint buffer */ + if ((pHdr->PayloadLen + HTC_HDR_LENGTH) > pPacket->BufferLength) { + AR_DEBUG_PRINTF(ATH_DEBUG_ERR, + ("Payload Length Error : header reports payload of: %d, endpoint buffer size: %d \n", + pHdr->PayloadLen, pPacket->BufferLength)); + status = A_EPROTO; + break; + } + + pPacket->HTCReserved = LookAhead; /* set expected look ahead */ + /* set the amount of data to fetch */ + pPacket->ActualLength = pHdr->PayloadLen + HTC_HDR_LENGTH; + + 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; + } + + /* go fetch the packet */ + status = HTCIssueRecv(target, pPacket); + + if (A_FAILED(status)) { + break; + } + + 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; + } + + /* in the sync case, we process the packet, check lookaheads and then repeat */ + + LookAhead = 0; + status = HTCProcessRecvHeader(target,pPacket,&LookAhead); + + if (A_FAILED(status)) { + break; + } + + HTC_RX_STAT_PROFILE(target,pEndpoint,LookAhead); + DO_RCV_COMPLETION(target,pPacket,pEndpoint); + + pPacket = NULL; + + if (0 == LookAhead) { + break; + } + + } + + if (A_NO_MEMORY == status) { + AR_DEBUG_PRINTF(ATH_DEBUG_ERR, + (" Endpoint :%d has no buffers, blocking receiver to prevent overrun.. \n", + pHdr->EndpointID)); + /* try to stop receive at the device layer */ + DevStopRecv(&target->Device, asyncProc ? DEV_STOP_RECV_ASYNC : DEV_STOP_RECV_SYNC); + status = A_OK; + } else if (A_FAILED(status)) { + AR_DEBUG_PRINTF(ATH_DEBUG_ERR, + ("Failed to get pending message : LookAhead Value: 0x%X (status = %d) \n", + LookAhead, status)); + if (pPacket != NULL) { + /* clean up packet on error */ + HTC_RECYCLE_RX_PKT(target, pPacket); + } + } + + AR_DEBUG_PRINTF(ATH_DEBUG_RECV,("-HTCRecvMessagePendingHandler \n")); + + return status; +} + +/* Makes a buffer available to the HTC module */ +A_STATUS HTCAddReceivePkt(HTC_HANDLE HTCHandle, HTC_PACKET *pPacket) +{ + HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); + HTC_ENDPOINT *pEndpoint; + A_BOOL unblockRecv = FALSE; + A_STATUS status = A_OK; + + AR_DEBUG_PRINTF(ATH_DEBUG_SEND, + ("+- HTCAddReceivePkt: endPointId: %d, buffer: 0x%X, length: %d\n", + pPacket->Endpoint, (A_UINT32)pPacket->pBuffer, pPacket->BufferLength)); + + do { + + if (HTC_STOPPING(target)) { + status = A_ECANCELED; + break; + } + + AR_DEBUG_ASSERT(pPacket->Endpoint < ENDPOINT_MAX); + + pEndpoint = &target->EndPoint[pPacket->Endpoint]; + + LOCK_HTC_RX(target); + + /* store receive packet */ + HTC_PACKET_ENQUEUE(&pEndpoint->RxBuffers, pPacket); + + /* check if we are blocked waiting for a new buffer */ + if (target->HTCStateFlags & HTC_STATE_WAIT_BUFFERS) { + if (target->EpWaitingForBuffers == pPacket->Endpoint) { + AR_DEBUG_PRINTF(ATH_DEBUG_RECV,(" receiver was blocked on ep:%d, unblocking.. \n", + target->EpWaitingForBuffers)); + target->HTCStateFlags &= ~HTC_STATE_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; +} + +static void HTCFlushEndpointRX(HTC_TARGET *target, HTC_ENDPOINT *pEndpoint) +{ + HTC_PACKET *pPacket; + + LOCK_HTC_RX(target); + + while (1) { + pPacket = HTC_PACKET_DEQUEUE(&pEndpoint->RxBuffers); + 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%X, length:%d, ep:%d \n", + (A_UINT32)pPacket, pPacket->BufferLength, pPacket->Endpoint)); + /* give the packet back */ + pEndpoint->EpCallBacks.EpRecv(pEndpoint->EpCallBacks.pContext, + pPacket); + LOCK_HTC_RX(target); + } + + UNLOCK_HTC_RX(target); + + +} + +void HTCFlushRecvBuffers(HTC_TARGET *target) +{ + HTC_ENDPOINT *pEndpoint; + int i; + + /* NOTE: no need to flush endpoint 0, these buffers were + * allocated as part of the HTC struct */ + for (i = ENDPOINT_1; i < ENDPOINT_MAX; i++) { + pEndpoint = &target->EndPoint[i]; + if (pEndpoint->ServiceID == 0) { + /* not in use.. */ + continue; + } + HTCFlushEndpointRX(target,pEndpoint); + } + + +} + + |