mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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fb189822fc
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15918 3c298f89-4303-0410-b956-a3cf2f4a3e73
404 lines
15 KiB
C
404 lines
15 KiB
C
/*
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*
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* Copyright (c) 2007 Atheros Communications Inc.
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* All rights reserved.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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*
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*
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*/
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#include "htc_internal.h"
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void HTCControlTxComplete(void *Context, HTC_PACKET *pPacket)
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{
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/* not implemented
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* we do not send control TX frames during normal runtime, only during setup */
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AR_DEBUG_ASSERT(FALSE);
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}
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/* callback when a control message arrives on this endpoint */
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void HTCControlRecv(void *Context, HTC_PACKET *pPacket)
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{
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AR_DEBUG_ASSERT(pPacket->Endpoint == ENDPOINT_0);
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/* the only control messages we are expecting are NULL messages (credit resports), which should
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* never get here */
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AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
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("HTCControlRecv, got message with length:%d \n",
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pPacket->ActualLength + HTC_HDR_LENGTH));
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/* dump header and message */
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DebugDumpBytes(pPacket->pBuffer - HTC_HDR_LENGTH,
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pPacket->ActualLength + HTC_HDR_LENGTH,
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"Unexpected ENDPOINT 0 Message");
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HTC_RECYCLE_RX_PKT((HTC_TARGET*)Context,pPacket);
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}
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A_STATUS HTCSendSetupComplete(HTC_TARGET *target)
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{
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HTC_PACKET *pSendPacket = NULL;
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A_STATUS status;
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HTC_SETUP_COMPLETE_MSG *pSetupComplete;
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do {
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/* allocate a packet to send to the target */
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pSendPacket = HTC_ALLOC_CONTROL_TX(target);
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if (NULL == pSendPacket) {
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status = A_NO_MEMORY;
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break;
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}
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/* assemble setup complete message */
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pSetupComplete = (HTC_SETUP_COMPLETE_MSG *)pSendPacket->pBuffer;
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A_MEMZERO(pSetupComplete,sizeof(HTC_SETUP_COMPLETE_MSG));
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pSetupComplete->MessageID = HTC_MSG_SETUP_COMPLETE_ID;
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SET_HTC_PACKET_INFO_TX(pSendPacket,
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NULL,
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(A_UINT8 *)pSetupComplete,
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sizeof(HTC_SETUP_COMPLETE_MSG),
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ENDPOINT_0,
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HTC_SERVICE_TX_PACKET_TAG);
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/* we want synchronous operation */
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pSendPacket->Completion = NULL;
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/* send the message */
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status = HTCIssueSend(target,pSendPacket,0);
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} while (FALSE);
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if (pSendPacket != NULL) {
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HTC_FREE_CONTROL_TX(target,pSendPacket);
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}
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return status;
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}
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A_STATUS HTCConnectService(HTC_HANDLE HTCHandle,
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HTC_SERVICE_CONNECT_REQ *pConnectReq,
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HTC_SERVICE_CONNECT_RESP *pConnectResp)
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{
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HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
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A_STATUS status = A_OK;
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HTC_PACKET *pRecvPacket = NULL;
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HTC_PACKET *pSendPacket = NULL;
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HTC_CONNECT_SERVICE_RESPONSE_MSG *pResponseMsg;
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HTC_CONNECT_SERVICE_MSG *pConnectMsg;
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HTC_ENDPOINT_ID assignedEndpoint = ENDPOINT_MAX;
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HTC_ENDPOINT *pEndpoint;
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int maxMsgSize = 0;
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AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("+HTCConnectService, target:0x%X SvcID:0x%X \n",
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(A_UINT32)target, pConnectReq->ServiceID));
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do {
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AR_DEBUG_ASSERT(pConnectReq->ServiceID != 0);
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if (HTC_CTRL_RSVD_SVC == pConnectReq->ServiceID) {
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/* special case for pseudo control service */
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assignedEndpoint = ENDPOINT_0;
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maxMsgSize = HTC_MAX_CONTROL_MESSAGE_LENGTH;
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} else {
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/* allocate a packet to send to the target */
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pSendPacket = HTC_ALLOC_CONTROL_TX(target);
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if (NULL == pSendPacket) {
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AR_DEBUG_ASSERT(FALSE);
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status = A_NO_MEMORY;
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break;
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}
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/* assemble connect service message */
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pConnectMsg = (HTC_CONNECT_SERVICE_MSG *)pSendPacket->pBuffer;
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AR_DEBUG_ASSERT(pConnectMsg != NULL);
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A_MEMZERO(pConnectMsg,sizeof(HTC_CONNECT_SERVICE_MSG));
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pConnectMsg->MessageID = HTC_MSG_CONNECT_SERVICE_ID;
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pConnectMsg->ServiceID = pConnectReq->ServiceID;
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pConnectMsg->ConnectionFlags = pConnectReq->ConnectionFlags;
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/* check caller if it wants to transfer meta data */
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if ((pConnectReq->pMetaData != NULL) &&
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(pConnectReq->MetaDataLength <= HTC_SERVICE_META_DATA_MAX_LENGTH)) {
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/* copy meta data into message buffer (after header ) */
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A_MEMCPY((A_UINT8 *)pConnectMsg + sizeof(HTC_CONNECT_SERVICE_MSG),
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pConnectReq->pMetaData,
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pConnectReq->MetaDataLength);
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pConnectMsg->ServiceMetaLength = pConnectReq->MetaDataLength;
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}
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SET_HTC_PACKET_INFO_TX(pSendPacket,
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NULL,
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(A_UINT8 *)pConnectMsg,
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sizeof(HTC_CONNECT_SERVICE_MSG) + pConnectMsg->ServiceMetaLength,
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ENDPOINT_0,
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HTC_SERVICE_TX_PACKET_TAG);
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/* we want synchronous operation */
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pSendPacket->Completion = NULL;
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status = HTCIssueSend(target,pSendPacket,0);
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if (A_FAILED(status)) {
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break;
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}
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/* wait for response */
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status = HTCWaitforControlMessage(target, &pRecvPacket);
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if (A_FAILED(status)) {
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break;
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}
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/* we controlled the buffer creation so it has to be properly aligned */
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pResponseMsg = (HTC_CONNECT_SERVICE_RESPONSE_MSG *)pRecvPacket->pBuffer;
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if ((pResponseMsg->MessageID != HTC_MSG_CONNECT_SERVICE_RESPONSE_ID) ||
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(pRecvPacket->ActualLength < sizeof(HTC_CONNECT_SERVICE_RESPONSE_MSG))) {
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/* this message is not valid */
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AR_DEBUG_ASSERT(FALSE);
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status = A_EPROTO;
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break;
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}
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pConnectResp->ConnectRespCode = pResponseMsg->Status;
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/* check response status */
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if (pResponseMsg->Status != HTC_SERVICE_SUCCESS) {
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AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
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(" Target failed service 0x%X connect request (status:%d)\n",
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pResponseMsg->ServiceID, pResponseMsg->Status));
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status = A_EPROTO;
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break;
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}
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assignedEndpoint = pResponseMsg->EndpointID;
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maxMsgSize = pResponseMsg->MaxMsgSize;
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if ((pConnectResp->pMetaData != NULL) &&
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(pResponseMsg->ServiceMetaLength > 0) &&
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(pResponseMsg->ServiceMetaLength <= HTC_SERVICE_META_DATA_MAX_LENGTH)) {
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/* caller supplied a buffer and the target responded with data */
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int copyLength = min((int)pConnectResp->BufferLength, (int)pResponseMsg->ServiceMetaLength);
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/* copy the meta data */
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A_MEMCPY(pConnectResp->pMetaData,
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((A_UINT8 *)pResponseMsg) + sizeof(HTC_CONNECT_SERVICE_RESPONSE_MSG),
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copyLength);
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pConnectResp->ActualLength = copyLength;
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}
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}
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/* the rest of these are parameter checks so set the error status */
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status = A_EPROTO;
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if (assignedEndpoint >= ENDPOINT_MAX) {
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AR_DEBUG_ASSERT(FALSE);
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break;
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}
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if (0 == maxMsgSize) {
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AR_DEBUG_ASSERT(FALSE);
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break;
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}
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pEndpoint = &target->EndPoint[assignedEndpoint];
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if (pEndpoint->ServiceID != 0) {
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/* endpoint already in use! */
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AR_DEBUG_ASSERT(FALSE);
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break;
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}
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/* return assigned endpoint to caller */
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pConnectResp->Endpoint = assignedEndpoint;
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pConnectResp->MaxMsgLength = maxMsgSize;
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/* setup the endpoint */
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pEndpoint->ServiceID = pConnectReq->ServiceID; /* this marks the endpoint in use */
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pEndpoint->MaxTxQueueDepth = pConnectReq->MaxSendQueueDepth;
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pEndpoint->MaxMsgLength = maxMsgSize;
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/* copy all the callbacks */
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pEndpoint->EpCallBacks = pConnectReq->EpCallbacks;
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INIT_HTC_PACKET_QUEUE(&pEndpoint->RxBuffers);
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INIT_HTC_PACKET_QUEUE(&pEndpoint->TxQueue);
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/* set the credit distribution info for this endpoint, this information is
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* passed back to the credit distribution callback function */
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pEndpoint->CreditDist.ServiceID = pConnectReq->ServiceID;
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pEndpoint->CreditDist.pHTCReserved = pEndpoint;
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pEndpoint->CreditDist.Endpoint = assignedEndpoint;
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pEndpoint->CreditDist.TxCreditSize = target->TargetCreditSize;
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pEndpoint->CreditDist.TxCreditsPerMaxMsg = maxMsgSize / target->TargetCreditSize;
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if (0 == pEndpoint->CreditDist.TxCreditsPerMaxMsg) {
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pEndpoint->CreditDist.TxCreditsPerMaxMsg = 1;
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}
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status = A_OK;
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} while (FALSE);
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if (pSendPacket != NULL) {
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HTC_FREE_CONTROL_TX(target,pSendPacket);
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}
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if (pRecvPacket != NULL) {
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HTC_FREE_CONTROL_RX(target,pRecvPacket);
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}
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AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("-HTCConnectService \n"));
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return status;
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}
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static void AddToEndpointDistList(HTC_TARGET *target, HTC_ENDPOINT_CREDIT_DIST *pEpDist)
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{
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HTC_ENDPOINT_CREDIT_DIST *pCurEntry,*pLastEntry;
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if (NULL == target->EpCreditDistributionListHead) {
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target->EpCreditDistributionListHead = pEpDist;
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pEpDist->pNext = NULL;
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pEpDist->pPrev = NULL;
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return;
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}
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/* queue to the end of the list, this does not have to be very
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* fast since this list is built at startup time */
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pCurEntry = target->EpCreditDistributionListHead;
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while (pCurEntry) {
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pLastEntry = pCurEntry;
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pCurEntry = pCurEntry->pNext;
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}
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pLastEntry->pNext = pEpDist;
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pEpDist->pPrev = pLastEntry;
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pEpDist->pNext = NULL;
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}
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/* default credit init callback */
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static void HTCDefaultCreditInit(void *Context,
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HTC_ENDPOINT_CREDIT_DIST *pEPList,
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int TotalCredits)
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{
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HTC_ENDPOINT_CREDIT_DIST *pCurEpDist;
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int totalEps = 0;
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int creditsPerEndpoint;
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pCurEpDist = pEPList;
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/* first run through the list and figure out how many endpoints we are dealing with */
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while (pCurEpDist != NULL) {
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pCurEpDist = pCurEpDist->pNext;
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totalEps++;
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}
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/* even distribution */
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creditsPerEndpoint = TotalCredits/totalEps;
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pCurEpDist = pEPList;
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/* run through the list and set minimum and normal credits and
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* provide the endpoint with some credits to start */
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while (pCurEpDist != NULL) {
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if (creditsPerEndpoint < pCurEpDist->TxCreditsPerMaxMsg) {
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/* too many endpoints and not enough credits */
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AR_DEBUG_ASSERT(FALSE);
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break;
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}
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/* our minimum is set for at least 1 max message */
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pCurEpDist->TxCreditsMin = pCurEpDist->TxCreditsPerMaxMsg;
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/* this value is ignored by our credit alg, since we do
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* not dynamically adjust credits, this is the policy of
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* the "default" credit distribution, something simple and easy */
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pCurEpDist->TxCreditsNorm = 0xFFFF;
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/* give the endpoint minimum credits */
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pCurEpDist->TxCredits = creditsPerEndpoint;
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pCurEpDist->TxCreditsAssigned = creditsPerEndpoint;
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pCurEpDist = pCurEpDist->pNext;
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}
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}
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/* default credit distribution callback, NOTE, this callback holds the TX lock */
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void HTCDefaultCreditDist(void *Context,
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HTC_ENDPOINT_CREDIT_DIST *pEPDistList,
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HTC_CREDIT_DIST_REASON Reason)
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{
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HTC_ENDPOINT_CREDIT_DIST *pCurEpDist;
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if (Reason == HTC_CREDIT_DIST_SEND_COMPLETE) {
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pCurEpDist = pEPDistList;
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/* simple distribution */
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while (pCurEpDist != NULL) {
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if (pCurEpDist->TxCreditsToDist > 0) {
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/* just give the endpoint back the credits */
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pCurEpDist->TxCredits += pCurEpDist->TxCreditsToDist;
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pCurEpDist->TxCreditsToDist = 0;
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}
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pCurEpDist = pCurEpDist->pNext;
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}
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}
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/* note we do not need to handle the other reason codes as this is a very
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* simple distribution scheme, no need to seek for more credits or handle inactivity */
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}
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void HTCSetCreditDistribution(HTC_HANDLE HTCHandle,
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void *pCreditDistContext,
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HTC_CREDIT_DIST_CALLBACK CreditDistFunc,
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HTC_CREDIT_INIT_CALLBACK CreditInitFunc,
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HTC_SERVICE_ID ServicePriorityOrder[],
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int ListLength)
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{
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HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
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int i;
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int ep;
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if (CreditInitFunc != NULL) {
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/* caller has supplied their own distribution functions */
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target->InitCredits = CreditInitFunc;
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AR_DEBUG_ASSERT(CreditDistFunc != NULL);
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target->DistributeCredits = CreditDistFunc;
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target->pCredDistContext = pCreditDistContext;
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} else {
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/* caller wants HTC to do distribution */
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/* if caller wants service to handle distributions then
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* it must set both of these to NULL! */
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AR_DEBUG_ASSERT(CreditDistFunc == NULL);
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target->InitCredits = HTCDefaultCreditInit;
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target->DistributeCredits = HTCDefaultCreditDist;
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target->pCredDistContext = target;
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}
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/* always add HTC control endpoint first, we only expose the list after the
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* first one, this is added for TX queue checking */
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AddToEndpointDistList(target, &target->EndPoint[ENDPOINT_0].CreditDist);
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/* build the list of credit distribution structures in priority order
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* supplied by the caller, these will follow endpoint 0 */
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for (i = 0; i < ListLength; i++) {
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/* match services with endpoints and add the endpoints to the distribution list
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* in FIFO order */
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for (ep = ENDPOINT_1; ep < ENDPOINT_MAX; ep++) {
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if (target->EndPoint[ep].ServiceID == ServicePriorityOrder[i]) {
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/* queue this one to the list */
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AddToEndpointDistList(target, &target->EndPoint[ep].CreditDist);
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break;
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}
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}
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AR_DEBUG_ASSERT(ep < ENDPOINT_MAX);
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}
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}
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