drivers/staging/vt6655/wroute.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * File: wroute.c
  20  *
  21  * Purpose: handle WMAC frame relay & filtering
  22  *
  23  * Author: Lyndon Chen
  24  *
  25  * Date: May 20, 2003
  26  *
  27  * Functions:
  28  *      ROUTEbRelay - Relay packet
  29  *
  30  * Revision History:
  31  *
  32  */
  33
  34 #include "mac.h"
  35 #include "tcrc.h"
  36 #include "rxtx.h"
  37 #include "wroute.h"
  38 #include "card.h"
  39 #include "baseband.h"
  40
  41 /*---------------------  Static Definitions -------------------------*/
  42
  43 /*---------------------  Static Classes  ----------------------------*/
  44
  45 /*---------------------  Static Variables  --------------------------*/
  46 static int msglevel = MSG_LEVEL_INFO;
  47 //static int          msglevel                =MSG_LEVEL_DEBUG;
  48 /*---------------------  Static Functions  --------------------------*/
  49
  50 /*---------------------  Export Variables  --------------------------*/
  51
  52 /*
  53  * Description:
  54  *      Relay packet.  Return true if packet is copy to DMA1
  55  *
  56  * Parameters:
  57  *  In:
  58  *      pDevice             -
  59  *      pbySkbData          - rx packet skb data
  60  *  Out:
  61  *      true, false
  62  *
  63  * Return Value: true if packet duplicate; otherwise false
  64  *
  65  */
  66 bool ROUTEbRelay(PSDevice pDevice, unsigned char *pbySkbData, unsigned int uDataLen, unsigned int uNodeIndex)
  67 {
  68         PSMgmtObject    pMgmt = pDevice->pMgmt;
  69         PSTxDesc        pHeadTD, pLastTD;
  70         unsigned int cbFrameBodySize;
  71         unsigned int uMACfragNum;
  72         unsigned char byPktType;
  73         bool bNeedEncryption = false;
  74         SKeyItem        STempKey;
  75         PSKeyItem       pTransmitKey = NULL;
  76         unsigned int cbHeaderSize;
  77         unsigned int ii;
  78         unsigned char *pbyBSSID;
  79
  80         if (AVAIL_TD(pDevice, TYPE_AC0DMA) <= 0) {
  81                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Relay can't allocate TD1..\n");
  82                 return false;
  83         }
  84
  85         pHeadTD = pDevice->apCurrTD[TYPE_AC0DMA];
  86
  87         pHeadTD->m_td1TD1.byTCR = (TCR_EDP | TCR_STP);
  88
  89         memcpy(pDevice->sTxEthHeader.abyDstAddr, (unsigned char *)pbySkbData, ETH_HLEN);
  90
  91         cbFrameBodySize = uDataLen - ETH_HLEN;
  92
  93         if (ntohs(pDevice->sTxEthHeader.wType) > ETH_DATA_LEN) {
  94                 cbFrameBodySize += 8;
  95         }
  96
  97         if (pDevice->bEncryptionEnable == true) {
  98                 bNeedEncryption = true;
  99
 100                 // get group key
 101                 pbyBSSID = pDevice->abyBroadcastAddr;
 102                 if (KeybGetTransmitKey(&(pDevice->sKey), pbyBSSID, GROUP_KEY, &pTransmitKey) == false) {
 103                         pTransmitKey = NULL;
 104                         DBG_PRT(MSG_LEVEL_DEBUG, KERN_DEBUG "KEY is NULL. [%d]\n", pDevice->pMgmt->eCurrMode);
 105                 } else {
 106                         DBG_PRT(MSG_LEVEL_DEBUG, KERN_DEBUG "Get GTK.\n");
 107                 }
 108         }
 109
 110         if (pDevice->bEnableHostWEP) {
 111                 if (uNodeIndex < MAX_NODE_NUM + 1) {
 112                         pTransmitKey = &STempKey;
 113                         pTransmitKey->byCipherSuite = pMgmt->sNodeDBTable[uNodeIndex].byCipherSuite;
 114                         pTransmitKey->dwKeyIndex = pMgmt->sNodeDBTable[uNodeIndex].dwKeyIndex;
 115                         pTransmitKey->uKeyLength = pMgmt->sNodeDBTable[uNodeIndex].uWepKeyLength;
 116                         pTransmitKey->dwTSC47_16 = pMgmt->sNodeDBTable[uNodeIndex].dwTSC47_16;
 117                         pTransmitKey->wTSC15_0 = pMgmt->sNodeDBTable[uNodeIndex].wTSC15_0;
 118                         memcpy(pTransmitKey->abyKey,
 119                                &pMgmt->sNodeDBTable[uNodeIndex].abyWepKey[0],
 120                                pTransmitKey->uKeyLength
 121 );
 122                 }
 123         }
 124
 125         uMACfragNum = cbGetFragCount(pDevice, pTransmitKey, cbFrameBodySize, &pDevice->sTxEthHeader);
 126
 127         if (uMACfragNum > AVAIL_TD(pDevice, TYPE_AC0DMA)) {
 128                 return false;
 129         }
 130         byPktType = (unsigned char)pDevice->byPacketType;
 131
 132         if (pDevice->bFixRate) {
 133                 if (pDevice->eCurrentPHYType == PHY_TYPE_11B) {
 134                         if (pDevice->uConnectionRate >= RATE_11M) {
 135                                 pDevice->wCurrentRate = RATE_11M;
 136                         } else {
 137                                 pDevice->wCurrentRate = (unsigned short)pDevice->uConnectionRate;
 138                         }
 139                 } else {
 140                         if ((pDevice->eCurrentPHYType == PHY_TYPE_11A) &&
 141                             (pDevice->uConnectionRate <= RATE_6M)) {
 142                                 pDevice->wCurrentRate = RATE_6M;
 143                         } else {
 144                                 if (pDevice->uConnectionRate >= RATE_54M)
 145                                         pDevice->wCurrentRate = RATE_54M;
 146                                 else
 147                                         pDevice->wCurrentRate = (unsigned short)pDevice->uConnectionRate;
 148                         }
 149                 }
 150         } else {
 151                 pDevice->wCurrentRate = pDevice->pMgmt->sNodeDBTable[uNodeIndex].wTxDataRate;
 152         }
 153
 154         if (pDevice->wCurrentRate <= RATE_11M)
 155                 byPktType = PK_TYPE_11B;
 156
 157         vGenerateFIFOHeader(pDevice, byPktType, pDevice->pbyTmpBuff, bNeedEncryption,
 158                             cbFrameBodySize, TYPE_AC0DMA, pHeadTD,
 159                             &pDevice->sTxEthHeader, pbySkbData, pTransmitKey, uNodeIndex,
 160                             &uMACfragNum,
 161                             &cbHeaderSize
 162 );
 163
 164         if (MACbIsRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PS)) {
 165                 // Disable PS
 166                 MACbPSWakeup(pDevice->PortOffset);
 167         }
 168
 169         pDevice->bPWBitOn = false;
 170
 171         pLastTD = pHeadTD;
 172         for (ii = 0; ii < uMACfragNum; ii++) {
 173                 // Poll Transmit the adapter
 174                 wmb();
 175                 pHeadTD->m_td0TD0.f1Owner = OWNED_BY_NIC;
 176                 wmb();
 177                 if (ii == (uMACfragNum - 1))
 178                         pLastTD = pHeadTD;
 179                 pHeadTD = pHeadTD->next;
 180         }
 181
 182         pLastTD->pTDInfo->skb = NULL;
 183         pLastTD->pTDInfo->byFlags = 0;
 184
 185         pDevice->apCurrTD[TYPE_AC0DMA] = pHeadTD;
 186
 187         MACvTransmitAC0(pDevice->PortOffset);
 188
 189         return true;
 190 }