Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 1 | /** |
| 2 | @file Transmit.c |
| 3 | @defgroup tx_functions Transmission |
| 4 | @section Queueing |
| 5 | @dot |
| 6 | digraph transmit1 { |
| 7 | node[shape=box] |
| 8 | edge[weight=5;color=red] |
Stephen Hemminger | 7441698 | 2010-11-01 09:53:58 -0400 | [diff] [blame^] | 9 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 10 | bcm_transmit->GetPacketQueueIndex[label="IP Packet"] |
| 11 | GetPacketQueueIndex->IpVersion4[label="IPV4"] |
| 12 | GetPacketQueueIndex->IpVersion6[label="IPV6"] |
| 13 | } |
| 14 | |
| 15 | @enddot |
| 16 | |
| 17 | @section De-Queueing |
| 18 | @dot |
| 19 | digraph transmit2 { |
| 20 | node[shape=box] |
| 21 | edge[weight=5;color=red] |
| 22 | interrupt_service_thread->transmit_packets |
| 23 | tx_pkt_hdler->transmit_packets |
| 24 | transmit_packets->CheckAndSendPacketFromIndex |
| 25 | transmit_packets->UpdateTokenCount |
| 26 | CheckAndSendPacketFromIndex->PruneQueue |
| 27 | CheckAndSendPacketFromIndex->IsPacketAllowedForFlow |
| 28 | CheckAndSendPacketFromIndex->SendControlPacket[label="control pkt"] |
| 29 | SendControlPacket->bcm_cmd53 |
| 30 | CheckAndSendPacketFromIndex->SendPacketFromQueue[label="data pkt"] |
| 31 | SendPacketFromQueue->SetupNextSend->bcm_cmd53 |
| 32 | } |
| 33 | @enddot |
| 34 | */ |
| 35 | |
| 36 | #include "headers.h" |
| 37 | |
| 38 | /******************************************************************* |
| 39 | * Function - bcm_transmit() |
| 40 | * |
| 41 | * Description - This is the main transmit function for our virtual |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 42 | * interface(eth0). It handles the ARP packets. It |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 43 | * clones this packet and then Queue it to a suitable |
| 44 | * Queue. Then calls the transmit_packet(). |
| 45 | * |
| 46 | * Parameter - skb - Pointer to the socket buffer structure |
| 47 | * dev - Pointer to the virtual net device structure |
| 48 | * |
| 49 | * Returns - zero (success) or -ve value (failure) |
| 50 | * |
| 51 | *********************************************************************/ |
| 52 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 53 | netdev_tx_t bcm_transmit(struct sk_buff *skb, struct net_device *dev) |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 54 | { |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 55 | PMINI_ADAPTER Adapter = GET_BCM_ADAPTER(dev); |
| 56 | SHORT qindex; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 57 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 58 | if (Adapter->device_removed || !Adapter->LinkUpStatus) |
| 59 | goto drop; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 60 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 61 | if (Adapter->TransferMode != IP_PACKET_ONLY_MODE ) |
| 62 | goto drop; |
| 63 | |
| 64 | qindex = GetPacketQueueIndex(Adapter, skb); |
| 65 | |
Stephen Hemminger | 7441698 | 2010-11-01 09:53:58 -0400 | [diff] [blame^] | 66 | if (INVALID_QUEUE_INDEX==qindex) |
| 67 | goto drop; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 68 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 69 | if (Adapter->PackInfo[qindex].uiCurrentPacketsOnHost >= SF_MAX_ALLOWED_PACKETS_TO_BACKUP) |
| 70 | return NETDEV_TX_BUSY; |
| 71 | |
| 72 | /* Now Enqueue the packet */ |
| 73 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, |
| 74 | "bcm_transmit Enqueueing the Packet To Queue %d",qindex); |
| 75 | spin_lock(&Adapter->PackInfo[qindex].SFQueueLock); |
| 76 | Adapter->PackInfo[qindex].uiCurrentBytesOnHost += skb->len; |
| 77 | Adapter->PackInfo[qindex].uiCurrentPacketsOnHost++; |
| 78 | |
| 79 | *((B_UINT32 *)skb->cb + SKB_CB_LATENCY_OFFSET ) = jiffies; |
| 80 | ENQUEUEPACKET(Adapter->PackInfo[qindex].FirstTxQueue, |
| 81 | Adapter->PackInfo[qindex].LastTxQueue, skb); |
| 82 | atomic_inc(&Adapter->TotalPacketCount); |
| 83 | spin_unlock(&Adapter->PackInfo[qindex].SFQueueLock); |
| 84 | |
| 85 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_OSAL_DBG, DBG_LVL_ALL,"ENQ: \n"); |
| 86 | |
| 87 | /* FIXME - this is racy and incorrect, replace with work queue */ |
| 88 | if (!atomic_read(&Adapter->TxPktAvail)) { |
| 89 | atomic_set(&Adapter->TxPktAvail, 1); |
| 90 | wake_up(&Adapter->tx_packet_wait_queue); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 91 | } |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 92 | return NETDEV_TX_OK; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 93 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 94 | drop: |
| 95 | dev_kfree_skb(skb); |
| 96 | return NETDEV_TX_OK; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | |
| 100 | /** |
| 101 | @ingroup ctrl_pkt_functions |
| 102 | This function dispatches control packet to the h/w interface |
| 103 | @return zero(success) or -ve value(failure) |
| 104 | */ |
| 105 | INT SendControlPacket(PMINI_ADAPTER Adapter, /**<Logical Adapter*/ |
| 106 | char *pControlPacket/**<Control Packet*/ |
| 107 | ) |
| 108 | { |
| 109 | PLEADER PLeader = NULL; |
| 110 | struct timeval tv; |
| 111 | memset(&tv, 0, sizeof(tv)); |
| 112 | |
| 113 | |
| 114 | |
| 115 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "========>"); |
| 116 | |
| 117 | PLeader=(PLEADER)pControlPacket; |
| 118 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Tx"); |
| 119 | if(!pControlPacket || !Adapter) |
| 120 | { |
| 121 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Got NULL Control Packet or Adapter"); |
| 122 | return STATUS_FAILURE; |
| 123 | } |
| 124 | if((atomic_read( &Adapter->CurrNumFreeTxDesc ) < |
| 125 | ((PLeader->PLength-1)/MAX_DEVICE_DESC_SIZE)+1)) |
| 126 | { |
| 127 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "NO FREE DESCRIPTORS TO SEND CONTROL PACKET"); |
| 128 | if(Adapter->bcm_jiffies == 0) |
| 129 | { |
| 130 | Adapter->bcm_jiffies = jiffies; |
| 131 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "UPDATED TIME(hex): %lu", |
| 132 | Adapter->bcm_jiffies); |
| 133 | } |
| 134 | return STATUS_FAILURE; |
| 135 | } |
| 136 | |
| 137 | /* Update the netdevice statistics */ |
| 138 | /* Dump Packet */ |
| 139 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Leader Status: %x", PLeader->Status); |
| 140 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Leader VCID: %x",PLeader->Vcid); |
| 141 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Leader Length: %x",PLeader->PLength); |
| 142 | if(Adapter->device_removed) |
| 143 | return 0; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 144 | Adapter->interface_transmit(Adapter->pvInterfaceAdapter, |
| 145 | pControlPacket, (PLeader->PLength + LEADER_SIZE)); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 146 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 147 | atomic_dec(&Adapter->CurrNumFreeTxDesc); |
| 148 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "<========="); |
| 149 | return STATUS_SUCCESS; |
| 150 | } |
| 151 | static LEADER Leader={0}; |
| 152 | /** |
| 153 | @ingroup tx_functions |
| 154 | This function despatches the IP packets with the given vcid |
| 155 | to the target via the host h/w interface. |
| 156 | @return zero(success) or -ve value(failure) |
| 157 | */ |
| 158 | INT SetupNextSend(PMINI_ADAPTER Adapter, /**<Logical Adapter*/ |
| 159 | struct sk_buff *Packet, /**<data buffer*/ |
| 160 | USHORT Vcid) /**<VCID for this packet*/ |
| 161 | { |
| 162 | int status=0; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 163 | BOOLEAN bHeaderSupressionEnabled = FALSE; |
| 164 | B_UINT16 uiClassifierRuleID; |
| 165 | int QueueIndex = NO_OF_QUEUES + 1; |
| 166 | |
| 167 | if(!Adapter || !Packet) |
| 168 | { |
| 169 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Got NULL Adapter or Packet"); |
| 170 | return -EINVAL; |
| 171 | } |
| 172 | if(Packet->len > MAX_DEVICE_DESC_SIZE) |
| 173 | { |
| 174 | status = STATUS_FAILURE; |
| 175 | goto errExit; |
| 176 | } |
| 177 | |
| 178 | /* Get the Classifier Rule ID */ |
| 179 | uiClassifierRuleID = *((UINT32*) (Packet->cb)+SKB_CB_CLASSIFICATION_OFFSET); |
| 180 | QueueIndex = SearchVcid( Adapter,Vcid); |
| 181 | if(QueueIndex < NO_OF_QUEUES) |
| 182 | { |
| 183 | bHeaderSupressionEnabled = |
| 184 | Adapter->PackInfo[QueueIndex].bHeaderSuppressionEnabled; |
| 185 | bHeaderSupressionEnabled = |
| 186 | bHeaderSupressionEnabled & Adapter->bPHSEnabled; |
| 187 | } |
| 188 | if(Adapter->device_removed) |
| 189 | { |
| 190 | status = STATUS_FAILURE; |
| 191 | goto errExit; |
| 192 | } |
| 193 | |
| 194 | status = PHSTransmit(Adapter, &Packet, Vcid, uiClassifierRuleID, bHeaderSupressionEnabled, |
| 195 | (UINT *)&Packet->len, Adapter->PackInfo[QueueIndex].bEthCSSupport); |
| 196 | |
| 197 | if(status != STATUS_SUCCESS) |
| 198 | { |
| 199 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "PHS Transmit failed..\n"); |
| 200 | goto errExit; |
| 201 | } |
| 202 | |
| 203 | Leader.Vcid = Vcid; |
| 204 | |
| 205 | if(TCP_ACK == *((UINT32*) (Packet->cb) + SKB_CB_TCPACK_OFFSET )) |
| 206 | { |
| 207 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Sending TCP ACK\n"); |
| 208 | Leader.Status = LEADER_STATUS_TCP_ACK; |
| 209 | } |
| 210 | else |
| 211 | { |
| 212 | Leader.Status = LEADER_STATUS; |
| 213 | } |
| 214 | |
| 215 | if(Adapter->PackInfo[QueueIndex].bEthCSSupport) |
| 216 | { |
| 217 | Leader.PLength = Packet->len; |
| 218 | if(skb_headroom(Packet) < LEADER_SIZE) |
| 219 | { |
| 220 | if((status = skb_cow(Packet,LEADER_SIZE))) |
| 221 | { |
| 222 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"bcm_transmit : Failed To Increase headRoom\n"); |
| 223 | goto errExit; |
| 224 | } |
| 225 | } |
| 226 | skb_push(Packet, LEADER_SIZE); |
| 227 | memcpy(Packet->data, &Leader, LEADER_SIZE); |
| 228 | } |
| 229 | |
| 230 | else |
| 231 | { |
| 232 | Leader.PLength = Packet->len - ETH_HLEN; |
| 233 | memcpy((LEADER*)skb_pull(Packet, (ETH_HLEN - LEADER_SIZE)), &Leader, LEADER_SIZE); |
| 234 | } |
| 235 | |
| 236 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Packet->len = %d", Packet->len); |
| 237 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Vcid = %d", Vcid); |
| 238 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 239 | status = Adapter->interface_transmit(Adapter->pvInterfaceAdapter, |
| 240 | Packet->data, (Leader.PLength + LEADER_SIZE)); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 241 | if(status) |
| 242 | { |
| 243 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Tx Failed..\n"); |
| 244 | } |
| 245 | else |
| 246 | { |
| 247 | Adapter->PackInfo[QueueIndex].uiTotalTxBytes += Leader.PLength; |
| 248 | atomic_add(Leader.PLength, &Adapter->GoodTxByteCount); |
| 249 | atomic_inc(&Adapter->TxTotalPacketCount); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | atomic_dec(&Adapter->CurrNumFreeTxDesc); |
| 253 | |
| 254 | errExit: |
| 255 | |
| 256 | if(STATUS_SUCCESS == status) |
| 257 | { |
| 258 | Adapter->PackInfo[QueueIndex].uiCurrentTokenCount -= Leader.PLength << 3; |
| 259 | Adapter->PackInfo[QueueIndex].uiSentBytes += (Packet->len); |
| 260 | Adapter->PackInfo[QueueIndex].uiSentPackets++; |
| 261 | Adapter->PackInfo[QueueIndex].NumOfPacketsSent++; |
| 262 | |
| 263 | atomic_dec(&Adapter->PackInfo[QueueIndex].uiPerSFTxResourceCount); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 264 | Adapter->PackInfo[QueueIndex].uiThisPeriodSentBytes += Leader.PLength; |
| 265 | } |
| 266 | |
| 267 | |
Stephen Hemminger | 082e889 | 2010-11-01 09:35:21 -0400 | [diff] [blame] | 268 | dev_kfree_skb(Packet); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 269 | return status; |
| 270 | } |
| 271 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 272 | static int tx_pending(PMINI_ADAPTER Adapter) |
| 273 | { |
| 274 | return (atomic_read(&Adapter->TxPktAvail) |
| 275 | && MINIMUM_PENDING_DESCRIPTORS < atomic_read(&Adapter->CurrNumFreeTxDesc)) |
| 276 | || Adapter->device_removed || (1 == Adapter->downloadDDR); |
| 277 | } |
| 278 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 279 | /** |
| 280 | @ingroup tx_functions |
| 281 | Transmit thread |
| 282 | */ |
| 283 | int tx_pkt_handler(PMINI_ADAPTER Adapter /**< pointer to adapter object*/ |
| 284 | ) |
| 285 | { |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 286 | int status = 0; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 287 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 288 | while(! kthread_should_stop()) { |
| 289 | /* FIXME - the timeout looks like workaround for racey usage of TxPktAvail */ |
| 290 | if(Adapter->LinkUpStatus) |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 291 | wait_event_timeout(Adapter->tx_packet_wait_queue, |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 292 | tx_pending(Adapter), msecs_to_jiffies(10)); |
| 293 | else |
| 294 | wait_event_interruptible(Adapter->tx_packet_wait_queue, |
| 295 | tx_pending(Adapter)); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 296 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 297 | if (Adapter->device_removed) |
| 298 | break; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 299 | |
| 300 | if(Adapter->downloadDDR == 1) |
| 301 | { |
| 302 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Downloading DDR Settings\n"); |
| 303 | Adapter->downloadDDR +=1; |
| 304 | status = download_ddr_settings(Adapter); |
| 305 | if(status) |
| 306 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "DDR DOWNLOAD FAILED!\n"); |
| 307 | continue; |
| 308 | } |
| 309 | |
| 310 | //Check end point for halt/stall. |
| 311 | if(Adapter->bEndPointHalted == TRUE) |
| 312 | { |
| 313 | Bcm_clear_halt_of_endpoints(Adapter); |
| 314 | Adapter->bEndPointHalted = FALSE; |
| 315 | StartInterruptUrb((PS_INTERFACE_ADAPTER)(Adapter->pvInterfaceAdapter)); |
| 316 | } |
| 317 | |
| 318 | if(Adapter->LinkUpStatus && !Adapter->IdleMode) |
| 319 | { |
| 320 | if(atomic_read(&Adapter->TotalPacketCount)) |
| 321 | { |
| 322 | update_per_sf_desc_cnts(Adapter); |
| 323 | } |
| 324 | } |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 325 | |
| 326 | if( atomic_read(&Adapter->CurrNumFreeTxDesc) && |
| 327 | Adapter->LinkStatus == SYNC_UP_REQUEST && |
| 328 | !Adapter->bSyncUpRequestSent) |
| 329 | { |
| 330 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Calling LinkMessage"); |
| 331 | LinkMessage(Adapter); |
| 332 | } |
| 333 | |
| 334 | if((Adapter->IdleMode || Adapter->bShutStatus) && atomic_read(&Adapter->TotalPacketCount)) |
| 335 | { |
| 336 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Device in Low Power mode...waking up"); |
| 337 | Adapter->usIdleModePattern = ABORT_IDLE_MODE; |
| 338 | Adapter->bWakeUpDevice = TRUE; |
| 339 | wake_up(&Adapter->process_rx_cntrlpkt); |
| 340 | } |
| 341 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 342 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 343 | transmit_packets(Adapter); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 344 | |
| 345 | atomic_set(&Adapter->TxPktAvail, 0); |
| 346 | } |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 347 | |
| 348 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Exiting the tx thread..\n"); |
| 349 | Adapter->transmit_packet_thread = NULL; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 350 | return 0; |
| 351 | } |
| 352 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 353 | |
| 354 | |