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 Functions  --------------------------*/
  48
  49 /*---------------------  Export Variables  --------------------------*/
  50
  51 /*
  52  * Description:
  53  *      Relay packet.  Return true if packet is copy to DMA1
  54  *
  55  * Parameters:
  56  *  In:
  57  *      pDevice             -
  58  *      pbySkbData          - rx packet skb data
  59  *  Out:
  60  *      true, false
  61  *
  62  * Return Value: true if packet duplicate; otherwise false
  63  *
  64  */
  65 bool ROUTEbRelay(PSDevice pDevice, unsigned char *pbySkbData,
  66                  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,
  82                         KERN_INFO "Relay can't allocate TD1..\n");
  83                 return false;
  84         }
  85
  86         pHeadTD = pDevice->apCurrTD[TYPE_AC0DMA];
  87
  88         pHeadTD->m_td1TD1.byTCR = (TCR_EDP | TCR_STP);
  89
  90         memcpy(pDevice->sTxEthHeader.abyDstAddr, pbySkbData, ETH_HLEN);
  91
  92         cbFrameBodySize = uDataLen - ETH_HLEN;
  93
  94         if (ntohs(pDevice->sTxEthHeader.wType) > ETH_DATA_LEN)
  95                 cbFrameBodySize += 8;
  96
  97         if (pDevice->bEncryptionEnable == true) {
  98                 bNeedEncryption = true;
  99
 100                 // get group key
 101                 pbyBSSID = pDevice->abyBroadcastAddr;
 102                 if (KeybGetTransmitKey(&(pDevice->sKey), pbyBSSID,
 103                     GROUP_KEY, &pTransmitKey) == false) {
 104                         pTransmitKey = NULL;
 105                         DBG_PRT(MSG_LEVEL_DEBUG,
 106                                 KERN_DEBUG "KEY is NULL. [%d]\n",
 107                                 pDevice->pMgmt->eCurrMode);
 108                 } else {
 109                         DBG_PRT(MSG_LEVEL_DEBUG, KERN_DEBUG "Get GTK.\n");
 110                 }
 111         }
 112
 113         if (pDevice->bEnableHostWEP) {
 114                 if (uNodeIndex < MAX_NODE_NUM + 1) {
 115                         pTransmitKey = &STempKey;
 116                         pTransmitKey->byCipherSuite = pMgmt->sNodeDBTable[uNodeIndex].byCipherSuite;
 117                         pTransmitKey->dwKeyIndex = pMgmt->sNodeDBTable[uNodeIndex].dwKeyIndex;
 118                         pTransmitKey->uKeyLength = pMgmt->sNodeDBTable[uNodeIndex].uWepKeyLength;
 119                         pTransmitKey->dwTSC47_16 = pMgmt->sNodeDBTable[uNodeIndex].dwTSC47_16;
 120                         pTransmitKey->wTSC15_0 = pMgmt->sNodeDBTable[uNodeIndex].wTSC15_0;
 121                         memcpy(pTransmitKey->abyKey,
 122                                &pMgmt->sNodeDBTable[uNodeIndex].abyWepKey[0],
 123                                pTransmitKey->uKeyLength);
 124                 }
 125         }
 126
 127         uMACfragNum = cbGetFragCount(pDevice, pTransmitKey,
 128                                      cbFrameBodySize, &pDevice->sTxEthHeader);
 129
 130         if (uMACfragNum > AVAIL_TD(pDevice, TYPE_AC0DMA))
 131                 return false;
 132
 133         byPktType = pDevice->byPacketType;
 134
 135         if (pDevice->bFixRate) {
 136                 if (pDevice->eCurrentPHYType == PHY_TYPE_11B) {
 137                         if (pDevice->uConnectionRate >= RATE_11M)
 138                                 pDevice->wCurrentRate = RATE_11M;
 139                         else
 140                                 pDevice->wCurrentRate = pDevice->uConnectionRate;
 141                 } else {
 142                         if ((pDevice->eCurrentPHYType == PHY_TYPE_11A) &&
 143                             (pDevice->uConnectionRate <= RATE_6M)) {
 144                                 pDevice->wCurrentRate = RATE_6M;
 145                         } else {
 146                                 if (pDevice->uConnectionRate >= RATE_54M)
 147                                         pDevice->wCurrentRate = RATE_54M;
 148                                 else
 149                                         pDevice->wCurrentRate = pDevice->uConnectionRate;
 150                         }
 151                 }
 152         } else {
 153                 pDevice->wCurrentRate = pDevice->pMgmt->sNodeDBTable[uNodeIndex].wTxDataRate;
 154         }
 155
 156         if (pDevice->wCurrentRate <= RATE_11M)
 157                 byPktType = PK_TYPE_11B;
 158
 159         vGenerateFIFOHeader(pDevice, byPktType, pDevice->pbyTmpBuff,
 160                             bNeedEncryption, cbFrameBodySize, TYPE_AC0DMA,
 161                             pHeadTD, &pDevice->sTxEthHeader, pbySkbData,
 162                             pTransmitKey, uNodeIndex, &uMACfragNum,
 163                             &cbHeaderSize);
 164
 165         if (MACbIsRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PS)) {
 166                 // Disable PS
 167                 MACbPSWakeup(pDevice->PortOffset);
 168         }
 169
 170         pDevice->bPWBitOn = false;
 171
 172         pLastTD = pHeadTD;
 173         for (ii = 0; ii < uMACfragNum; ii++) {
 174                 // Poll Transmit the adapter
 175                 wmb();
 176                 pHeadTD->m_td0TD0.f1Owner = OWNED_BY_NIC;
 177                 wmb();
 178                 if (ii == (uMACfragNum - 1))
 179                         pLastTD = pHeadTD;
 180                 pHeadTD = pHeadTD->next;
 181         }
 182
 183         pLastTD->pTDInfo->skb = NULL;
 184         pLastTD->pTDInfo->byFlags = 0;
 185
 186         pDevice->apCurrTD[TYPE_AC0DMA] = pHeadTD;
 187
 188         MACvTransmitAC0(pDevice->PortOffset);
 189
 190         return true;
 191 }