diff options
Diffstat (limited to 'drivers/ar6000/htc/htc_services.c')
| -rw-r--r-- | drivers/ar6000/htc/htc_services.c | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/drivers/ar6000/htc/htc_services.c b/drivers/ar6000/htc/htc_services.c new file mode 100644 index 00000000000..e5d50d16ddc --- /dev/null +++ b/drivers/ar6000/htc/htc_services.c @@ -0,0 +1,403 @@ +/* + * + * 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" + +void HTCControlTxComplete(void *Context, HTC_PACKET *pPacket) +{ + /* not implemented + * we do not send control TX frames during normal runtime, only during setup */ + AR_DEBUG_ASSERT(FALSE); +} + + /* callback when a control message arrives on this endpoint */ +void HTCControlRecv(void *Context, HTC_PACKET *pPacket) +{ + AR_DEBUG_ASSERT(pPacket->Endpoint == ENDPOINT_0); + + /* the only control messages we are expecting are NULL messages (credit resports), which should + * never get here */ + AR_DEBUG_PRINTF(ATH_DEBUG_ERR, + ("HTCControlRecv, got message with length:%d \n", + pPacket->ActualLength + HTC_HDR_LENGTH)); + + /* dump header and message */ + DebugDumpBytes(pPacket->pBuffer - HTC_HDR_LENGTH, + pPacket->ActualLength + HTC_HDR_LENGTH, + "Unexpected ENDPOINT 0 Message"); + + HTC_RECYCLE_RX_PKT((HTC_TARGET*)Context,pPacket); +} + +A_STATUS HTCSendSetupComplete(HTC_TARGET *target) +{ + HTC_PACKET *pSendPacket = NULL; + A_STATUS status; + HTC_SETUP_COMPLETE_MSG *pSetupComplete; + + do { + /* allocate a packet to send to the target */ + pSendPacket = HTC_ALLOC_CONTROL_TX(target); + + if (NULL == pSendPacket) { + status = A_NO_MEMORY; + break; + } + + /* assemble setup complete message */ + pSetupComplete = (HTC_SETUP_COMPLETE_MSG *)pSendPacket->pBuffer; + A_MEMZERO(pSetupComplete,sizeof(HTC_SETUP_COMPLETE_MSG)); + pSetupComplete->MessageID = HTC_MSG_SETUP_COMPLETE_ID; + + SET_HTC_PACKET_INFO_TX(pSendPacket, + NULL, + (A_UINT8 *)pSetupComplete, + sizeof(HTC_SETUP_COMPLETE_MSG), + ENDPOINT_0, + HTC_SERVICE_TX_PACKET_TAG); + + /* we want synchronous operation */ + pSendPacket->Completion = NULL; + /* send the message */ + status = HTCIssueSend(target,pSendPacket,0); + + } while (FALSE); + + if (pSendPacket != NULL) { + HTC_FREE_CONTROL_TX(target,pSendPacket); + } + + return status; +} + + +A_STATUS HTCConnectService(HTC_HANDLE HTCHandle, + HTC_SERVICE_CONNECT_REQ *pConnectReq, + HTC_SERVICE_CONNECT_RESP *pConnectResp) +{ + HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); + A_STATUS status = A_OK; + HTC_PACKET *pRecvPacket = NULL; + HTC_PACKET *pSendPacket = NULL; + HTC_CONNECT_SERVICE_RESPONSE_MSG *pResponseMsg; + HTC_CONNECT_SERVICE_MSG *pConnectMsg; + HTC_ENDPOINT_ID assignedEndpoint = ENDPOINT_MAX; + HTC_ENDPOINT *pEndpoint; + int maxMsgSize = 0; + + AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("+HTCConnectService, target:0x%X SvcID:0x%X \n", + (A_UINT32)target, pConnectReq->ServiceID)); + + do { + + AR_DEBUG_ASSERT(pConnectReq->ServiceID != 0); + + if (HTC_CTRL_RSVD_SVC == pConnectReq->ServiceID) { + /* special case for pseudo control service */ + assignedEndpoint = ENDPOINT_0; + maxMsgSize = HTC_MAX_CONTROL_MESSAGE_LENGTH; + } else { + /* allocate a packet to send to the target */ + pSendPacket = HTC_ALLOC_CONTROL_TX(target); + + if (NULL == pSendPacket) { + AR_DEBUG_ASSERT(FALSE); + status = A_NO_MEMORY; + break; + } + /* assemble connect service message */ + pConnectMsg = (HTC_CONNECT_SERVICE_MSG *)pSendPacket->pBuffer; + AR_DEBUG_ASSERT(pConnectMsg != NULL); + A_MEMZERO(pConnectMsg,sizeof(HTC_CONNECT_SERVICE_MSG)); + pConnectMsg->MessageID = HTC_MSG_CONNECT_SERVICE_ID; + pConnectMsg->ServiceID = pConnectReq->ServiceID; + pConnectMsg->ConnectionFlags = pConnectReq->ConnectionFlags; + /* check caller if it wants to transfer meta data */ + if ((pConnectReq->pMetaData != NULL) && + (pConnectReq->MetaDataLength <= HTC_SERVICE_META_DATA_MAX_LENGTH)) { + /* copy meta data into message buffer (after header ) */ + A_MEMCPY((A_UINT8 *)pConnectMsg + sizeof(HTC_CONNECT_SERVICE_MSG), + pConnectReq->pMetaData, + pConnectReq->MetaDataLength); + pConnectMsg->ServiceMetaLength = pConnectReq->MetaDataLength; + } + + SET_HTC_PACKET_INFO_TX(pSendPacket, + NULL, + (A_UINT8 *)pConnectMsg, + sizeof(HTC_CONNECT_SERVICE_MSG) + pConnectMsg->ServiceMetaLength, + ENDPOINT_0, + HTC_SERVICE_TX_PACKET_TAG); + + /* we want synchronous operation */ + pSendPacket->Completion = NULL; + + status = HTCIssueSend(target,pSendPacket,0); + + if (A_FAILED(status)) { + break; + } + + /* wait for response */ + status = HTCWaitforControlMessage(target, &pRecvPacket); + + if (A_FAILED(status)) { + break; + } + /* we controlled the buffer creation so it has to be properly aligned */ + pResponseMsg = (HTC_CONNECT_SERVICE_RESPONSE_MSG *)pRecvPacket->pBuffer; + + if ((pResponseMsg->MessageID != HTC_MSG_CONNECT_SERVICE_RESPONSE_ID) || + (pRecvPacket->ActualLength < sizeof(HTC_CONNECT_SERVICE_RESPONSE_MSG))) { + /* this message is not valid */ + AR_DEBUG_ASSERT(FALSE); + status = A_EPROTO; + break; + } + + pConnectResp->ConnectRespCode = pResponseMsg->Status; + /* check response status */ + if (pResponseMsg->Status != HTC_SERVICE_SUCCESS) { + AR_DEBUG_PRINTF(ATH_DEBUG_ERR, + (" Target failed service 0x%X connect request (status:%d)\n", + pResponseMsg->ServiceID, pResponseMsg->Status)); + status = A_EPROTO; + break; + } + + assignedEndpoint = pResponseMsg->EndpointID; + maxMsgSize = pResponseMsg->MaxMsgSize; + + if ((pConnectResp->pMetaData != NULL) && + (pResponseMsg->ServiceMetaLength > 0) && + (pResponseMsg->ServiceMetaLength <= HTC_SERVICE_META_DATA_MAX_LENGTH)) { + /* caller supplied a buffer and the target responded with data */ + int copyLength = min((int)pConnectResp->BufferLength, (int)pResponseMsg->ServiceMetaLength); + /* copy the meta data */ + A_MEMCPY(pConnectResp->pMetaData, + ((A_UINT8 *)pResponseMsg) + sizeof(HTC_CONNECT_SERVICE_RESPONSE_MSG), + copyLength); + pConnectResp->ActualLength = copyLength; + } + + } + + /* the rest of these are parameter checks so set the error status */ + status = A_EPROTO; + + if (assignedEndpoint >= ENDPOINT_MAX) { + AR_DEBUG_ASSERT(FALSE); + break; + } + + if (0 == maxMsgSize) { + AR_DEBUG_ASSERT(FALSE); + break; + } + + pEndpoint = &target->EndPoint[assignedEndpoint]; + + if (pEndpoint->ServiceID != 0) { + /* endpoint already in use! */ + AR_DEBUG_ASSERT(FALSE); + break; + } + + /* return assigned endpoint to caller */ + pConnectResp->Endpoint = assignedEndpoint; + pConnectResp->MaxMsgLength = maxMsgSize; + + /* setup the endpoint */ + pEndpoint->ServiceID = pConnectReq->ServiceID; /* this marks the endpoint in use */ + pEndpoint->MaxTxQueueDepth = pConnectReq->MaxSendQueueDepth; + pEndpoint->MaxMsgLength = maxMsgSize; + /* copy all the callbacks */ + pEndpoint->EpCallBacks = pConnectReq->EpCallbacks; + INIT_HTC_PACKET_QUEUE(&pEndpoint->RxBuffers); + INIT_HTC_PACKET_QUEUE(&pEndpoint->TxQueue); + /* set the credit distribution info for this endpoint, this information is + * passed back to the credit distribution callback function */ + pEndpoint->CreditDist.ServiceID = pConnectReq->ServiceID; + pEndpoint->CreditDist.pHTCReserved = pEndpoint; + pEndpoint->CreditDist.Endpoint = assignedEndpoint; + pEndpoint->CreditDist.TxCreditSize = target->TargetCreditSize; + pEndpoint->CreditDist.TxCreditsPerMaxMsg = maxMsgSize / target->TargetCreditSize; + + if (0 == pEndpoint->CreditDist.TxCreditsPerMaxMsg) { + pEndpoint->CreditDist.TxCreditsPerMaxMsg = 1; + } + + status = A_OK; + + } while (FALSE); + + if (pSendPacket != NULL) { + HTC_FREE_CONTROL_TX(target,pSendPacket); + } + + if (pRecvPacket != NULL) { + HTC_FREE_CONTROL_RX(target,pRecvPacket); + } + + AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("-HTCConnectService \n")); + + return status; +} + +static void AddToEndpointDistList(HTC_TARGET *target, HTC_ENDPOINT_CREDIT_DIST *pEpDist) +{ + HTC_ENDPOINT_CREDIT_DIST *pCurEntry,*pLastEntry; + + if (NULL == target->EpCreditDistributionListHead) { + target->EpCreditDistributionListHead = pEpDist; + pEpDist->pNext = NULL; + pEpDist->pPrev = NULL; + return; + } + + /* queue to the end of the list, this does not have to be very + * fast since this list is built at startup time */ + pCurEntry = target->EpCreditDistributionListHead; + + while (pCurEntry) { + pLastEntry = pCurEntry; + pCurEntry = pCurEntry->pNext; + } + + pLastEntry->pNext = pEpDist; + pEpDist->pPrev = pLastEntry; + pEpDist->pNext = NULL; +} + + + +/* default credit init callback */ +static void HTCDefaultCreditInit(void *Context, + HTC_ENDPOINT_CREDIT_DIST *pEPList, + int TotalCredits) +{ + HTC_ENDPOINT_CREDIT_DIST *pCurEpDist; + int totalEps = 0; + int creditsPerEndpoint; + + pCurEpDist = pEPList; + /* first run through the list and figure out how many endpoints we are dealing with */ + while (pCurEpDist != NULL) { + pCurEpDist = pCurEpDist->pNext; + totalEps++; + } + + /* even distribution */ + creditsPerEndpoint = TotalCredits/totalEps; + + pCurEpDist = pEPList; + /* run through the list and set minimum and normal credits and + * provide the endpoint with some credits to start */ + while (pCurEpDist != NULL) { + + if (creditsPerEndpoint < pCurEpDist->TxCreditsPerMaxMsg) { + /* too many endpoints and not enough credits */ + AR_DEBUG_ASSERT(FALSE); + break; + } + /* our minimum is set for at least 1 max message */ + pCurEpDist->TxCreditsMin = pCurEpDist->TxCreditsPerMaxMsg; + /* this value is ignored by our credit alg, since we do + * not dynamically adjust credits, this is the policy of + * the "default" credit distribution, something simple and easy */ + pCurEpDist->TxCreditsNorm = 0xFFFF; + /* give the endpoint minimum credits */ + pCurEpDist->TxCredits = creditsPerEndpoint; + pCurEpDist->TxCreditsAssigned = creditsPerEndpoint; + pCurEpDist = pCurEpDist->pNext; + } + +} + +/* default credit distribution callback, NOTE, this callback holds the TX lock */ +void HTCDefaultCreditDist(void *Context, + HTC_ENDPOINT_CREDIT_DIST *pEPDistList, + HTC_CREDIT_DIST_REASON Reason) +{ + HTC_ENDPOINT_CREDIT_DIST *pCurEpDist; + + if (Reason == HTC_CREDIT_DIST_SEND_COMPLETE) { + pCurEpDist = pEPDistList; + /* simple distribution */ + while (pCurEpDist != NULL) { + if (pCurEpDist->TxCreditsToDist > 0) { + /* just give the endpoint back the credits */ + pCurEpDist->TxCredits += pCurEpDist->TxCreditsToDist; + pCurEpDist->TxCreditsToDist = 0; + } + pCurEpDist = pCurEpDist->pNext; + } + } + + /* note we do not need to handle the other reason codes as this is a very + * simple distribution scheme, no need to seek for more credits or handle inactivity */ +} + +void HTCSetCreditDistribution(HTC_HANDLE HTCHandle, + void *pCreditDistContext, + HTC_CREDIT_DIST_CALLBACK CreditDistFunc, + HTC_CREDIT_INIT_CALLBACK CreditInitFunc, + HTC_SERVICE_ID ServicePriorityOrder[], + int ListLength) +{ + HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); + int i; + int ep; + + if (CreditInitFunc != NULL) { + /* caller has supplied their own distribution functions */ + target->InitCredits = CreditInitFunc; + AR_DEBUG_ASSERT(CreditDistFunc != NULL); + target->DistributeCredits = CreditDistFunc; + target->pCredDistContext = pCreditDistContext; + } else { + /* caller wants HTC to do distribution */ + /* if caller wants service to handle distributions then + * it must set both of these to NULL! */ + AR_DEBUG_ASSERT(CreditDistFunc == NULL); + target->InitCredits = HTCDefaultCreditInit; + target->DistributeCredits = HTCDefaultCreditDist; + target->pCredDistContext = target; + } + + /* always add HTC control endpoint first, we only expose the list after the + * first one, this is added for TX queue checking */ + AddToEndpointDistList(target, &target->EndPoint[ENDPOINT_0].CreditDist); + + /* build the list of credit distribution structures in priority order + * supplied by the caller, these will follow endpoint 0 */ + for (i = 0; i < ListLength; i++) { + /* match services with endpoints and add the endpoints to the distribution list + * in FIFO order */ + for (ep = ENDPOINT_1; ep < ENDPOINT_MAX; ep++) { + if (target->EndPoint[ep].ServiceID == ServicePriorityOrder[i]) { + /* queue this one to the list */ + AddToEndpointDistList(target, &target->EndPoint[ep].CreditDist); + break; + } + } + AR_DEBUG_ASSERT(ep < ENDPOINT_MAX); + } + +} |