drivers/staging/bcm/HandleControlPacket.c

   1 /**
   2  * @file HandleControlPacket.c
   3  * This file contains the routines to deal with
   4  * sending and receiving of control packets.
   5  */
   6 #include "headers.h"
   7
   8 /**
   9  * When a control packet is received, analyze the
  10  * "status" and call appropriate response function.
  11  * Enqueue the control packet for Application.
  12  * @return None
  13  */
  14 static VOID handle_rx_control_packet(struct bcm_mini_adapter *Adapter, struct sk_buff *skb)
  15 {
  16         struct bcm_tarang_data *pTarang = NULL;
  17         BOOLEAN HighPriorityMessage = FALSE;
  18         struct sk_buff *newPacket = NULL;
  19         CHAR cntrl_msg_mask_bit = 0;
  20         BOOLEAN drop_pkt_flag = TRUE;
  21         USHORT usStatus = *(PUSHORT)(skb->data);
  22
  23         if (netif_msg_pktdata(Adapter))
  24                 print_hex_dump(KERN_DEBUG, PFX "rx control: ", DUMP_PREFIX_NONE,
  25                                 16, 1, skb->data, skb->len, 0);
  26
  27         switch (usStatus) {
  28         case CM_RESPONSES:               /* 0xA0 */
  29                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, CP_CTRL_PKT,
  30                         DBG_LVL_ALL,
  31                         "MAC Version Seems to be Non Multi-Classifier, rejected by Driver");
  32                 HighPriorityMessage = TRUE;
  33                 break;
  34         case CM_CONTROL_NEWDSX_MULTICLASSIFIER_RESP:
  35                 HighPriorityMessage = TRUE;
  36                 if (Adapter->LinkStatus == LINKUP_DONE)
  37                         CmControlResponseMessage(Adapter,
  38                                 (skb->data + sizeof(USHORT)));
  39                 break;
  40         case LINK_CONTROL_RESP:          /* 0xA2 */
  41         case STATUS_RSP:                 /* 0xA1 */
  42                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, CP_CTRL_PKT,
  43                         DBG_LVL_ALL, "LINK_CONTROL_RESP");
  44                 HighPriorityMessage = TRUE;
  45                 LinkControlResponseMessage(Adapter,
  46                         (skb->data + sizeof(USHORT)));
  47                 break;
  48         case STATS_POINTER_RESP:         /* 0xA6 */
  49                 HighPriorityMessage = TRUE;
  50                 StatisticsResponse(Adapter, (skb->data + sizeof(USHORT)));
  51                 break;
  52         case IDLE_MODE_STATUS:           /* 0xA3 */
  53                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, CP_CTRL_PKT,
  54                         DBG_LVL_ALL,
  55                         "IDLE_MODE_STATUS Type Message Got from F/W");
  56                 InterfaceIdleModeRespond(Adapter, (PUINT)(skb->data +
  57                                         sizeof(USHORT)));
  58                 HighPriorityMessage = TRUE;
  59                 break;
  60
  61         case AUTH_SS_HOST_MSG:
  62                 HighPriorityMessage = TRUE;
  63                 break;
  64
  65         default:
  66                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, CP_CTRL_PKT,
  67                         DBG_LVL_ALL, "Got Default Response");
  68                 /* Let the Application Deal with This Packet */
  69                 break;
  70         }
  71
  72         /* Queue The Control Packet to The Application Queues */
  73         down(&Adapter->RxAppControlQueuelock);
  74
  75         for (pTarang = Adapter->pTarangs; pTarang; pTarang = pTarang->next) {
  76                 if (Adapter->device_removed)
  77                         break;
  78
  79                 drop_pkt_flag = TRUE;
  80                 /*
  81                  * There are cntrl msg from A0 to AC. It has been mapped to 0 to
  82                  * C bit in the cntrl mask.
  83                  * Also, by default AD to BF has been masked to the rest of the
  84                  * bits... which wil be ON by default.
  85                  * if mask bit is enable to particular pkt status, send it out
  86                  * to app else stop it.
  87                  */
  88                 cntrl_msg_mask_bit = (usStatus & 0x1F);
  89                 /*
  90                  * printk("\ninew  msg  mask bit which is disable in mask:%X",
  91                  *      cntrl_msg_mask_bit);
  92                  */
  93                 if (pTarang->RxCntrlMsgBitMask & (1 << cntrl_msg_mask_bit))
  94                         drop_pkt_flag = FALSE;
  95
  96                 if ((drop_pkt_flag == TRUE) ||
  97                                 (pTarang->AppCtrlQueueLen > MAX_APP_QUEUE_LEN)
  98                                 || ((pTarang->AppCtrlQueueLen >
  99                                         MAX_APP_QUEUE_LEN / 2) &&
 100                                     (HighPriorityMessage == FALSE))) {
 101                         /*
 102                          * Assumption:-
 103                          * 1. every tarang manages it own dropped pkt
 104                          *    statitistics
 105                          * 2. Total packet dropped per tarang will be equal to
 106                          *    the sum of all types of dropped pkt by that
 107                          *    tarang only.
 108                          */
 109                         switch (*(PUSHORT)skb->data) {
 110                         case CM_RESPONSES:
 111                                 pTarang->stDroppedAppCntrlMsgs.cm_responses++;
 112                                 break;
 113                         case CM_CONTROL_NEWDSX_MULTICLASSIFIER_RESP:
 114                                 pTarang->stDroppedAppCntrlMsgs.cm_control_newdsx_multiclassifier_resp++;
 115                                 break;
 116                         case LINK_CONTROL_RESP:
 117                                 pTarang->stDroppedAppCntrlMsgs.link_control_resp++;
 118                                 break;
 119                         case STATUS_RSP:
 120                                 pTarang->stDroppedAppCntrlMsgs.status_rsp++;
 121                                 break;
 122                         case STATS_POINTER_RESP:
 123                                 pTarang->stDroppedAppCntrlMsgs.stats_pointer_resp++;
 124                                 break;
 125                         case IDLE_MODE_STATUS:
 126                                 pTarang->stDroppedAppCntrlMsgs.idle_mode_status++;
 127                                 break;
 128                         case AUTH_SS_HOST_MSG:
 129                                 pTarang->stDroppedAppCntrlMsgs.auth_ss_host_msg++;
 130                                 break;
 131                         default:
 132                                 pTarang->stDroppedAppCntrlMsgs.low_priority_message++;
 133                                 break;
 134                         }
 135
 136                         continue;
 137                 }
 138
 139                 newPacket = skb_clone(skb, GFP_KERNEL);
 140                 if (!newPacket)
 141                         break;
 142                 ENQUEUEPACKET(pTarang->RxAppControlHead,
 143                                 pTarang->RxAppControlTail, newPacket);
 144                 pTarang->AppCtrlQueueLen++;
 145         }
 146         up(&Adapter->RxAppControlQueuelock);
 147         wake_up(&Adapter->process_read_wait_queue);
 148         dev_kfree_skb(skb);
 149         BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, CP_CTRL_PKT, DBG_LVL_ALL,
 150                         "After wake_up_interruptible");
 151 }
 152
 153 /**
 154  * @ingroup ctrl_pkt_functions
 155  * Thread to handle control pkt reception
 156  */
 157 int control_packet_handler(struct bcm_mini_adapter *Adapter /* pointer to adapter object*/)
 158 {
 159         struct sk_buff *ctrl_packet = NULL;
 160         unsigned long flags = 0;
 161         /* struct timeval tv; */
 162         /* int *puiBuffer = NULL; */
 163         BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, CP_CTRL_PKT, DBG_LVL_ALL,
 164                 "Entering to make thread wait on control packet event!");
 165         while (1) {
 166                 wait_event_interruptible(Adapter->process_rx_cntrlpkt,
 167                         atomic_read(&Adapter->cntrlpktCnt) ||
 168                         Adapter->bWakeUpDevice ||
 169                         kthread_should_stop());
 170
 171
 172                 if (kthread_should_stop()) {
 173                         BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, CP_CTRL_PKT,
 174                                 DBG_LVL_ALL, "Exiting\n");
 175                         return 0;
 176                 }
 177                 if (TRUE == Adapter->bWakeUpDevice) {
 178                         Adapter->bWakeUpDevice = FALSE;
 179                         if ((FALSE == Adapter->bTriedToWakeUpFromlowPowerMode)
 180                                         && ((TRUE == Adapter->IdleMode) ||
 181                                             (TRUE == Adapter->bShutStatus))) {
 182                                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS,
 183                                         CP_CTRL_PKT, DBG_LVL_ALL,
 184                                         "Calling InterfaceAbortIdlemode\n");
 185                                 /*
 186                                  * Adapter->bTriedToWakeUpFromlowPowerMode
 187                                  *                                      = TRUE;
 188                                  */
 189                                 InterfaceIdleModeWakeup(Adapter);
 190                         }
 191                         continue;
 192                 }
 193
 194                 while (atomic_read(&Adapter->cntrlpktCnt)) {
 195                         spin_lock_irqsave(&Adapter->control_queue_lock, flags);
 196                         ctrl_packet = Adapter->RxControlHead;
 197                         if (ctrl_packet) {
 198                                 DEQUEUEPACKET(Adapter->RxControlHead,
 199                                         Adapter->RxControlTail);
 200                                 /* Adapter->RxControlHead=ctrl_packet->next; */
 201                         }
 202
 203                         spin_unlock_irqrestore(&Adapter->control_queue_lock,
 204                                                 flags);
 205                         handle_rx_control_packet(Adapter, ctrl_packet);
 206                         atomic_dec(&Adapter->cntrlpktCnt);
 207                 }
 208
 209                 SetUpTargetDsxBuffers(Adapter);
 210         }
 211         return STATUS_SUCCESS;
 212 }
 213
 214 INT flushAllAppQ(void)
 215 {
 216         struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
 217         struct bcm_tarang_data *pTarang = NULL;
 218         struct sk_buff *PacketToDrop = NULL;
 219         for (pTarang = Adapter->pTarangs; pTarang; pTarang = pTarang->next) {
 220                 while (pTarang->RxAppControlHead != NULL) {
 221                         PacketToDrop = pTarang->RxAppControlHead;
 222                         DEQUEUEPACKET(pTarang->RxAppControlHead,
 223                                         pTarang->RxAppControlTail);
 224                         dev_kfree_skb(PacketToDrop);
 225                 }
 226                 pTarang->AppCtrlQueueLen = 0;
 227                 /* dropped contrl packet statistics also should be reset. */
 228                 memset((PVOID)&pTarang->stDroppedAppCntrlMsgs, 0,
 229                         sizeof(S_MIBS_DROPPED_APP_CNTRL_MESSAGES));
 230
 231         }
 232         return STATUS_SUCCESS;
 233 }
 234
 235