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 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 38 | |
| 39 | /** |
| 40 | @ingroup ctrl_pkt_functions |
| 41 | This function dispatches control packet to the h/w interface |
| 42 | @return zero(success) or -ve value(failure) |
| 43 | */ |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 44 | INT SendControlPacket(PMINI_ADAPTER Adapter, char *pControlPacket) |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 45 | { |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 46 | PLEADER PLeader = (PLEADER)pControlPacket; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 47 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 48 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Tx"); |
| 49 | if(!pControlPacket || !Adapter) |
| 50 | { |
| 51 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Got NULL Control Packet or Adapter"); |
| 52 | return STATUS_FAILURE; |
| 53 | } |
| 54 | if((atomic_read( &Adapter->CurrNumFreeTxDesc ) < |
| 55 | ((PLeader->PLength-1)/MAX_DEVICE_DESC_SIZE)+1)) |
| 56 | { |
| 57 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "NO FREE DESCRIPTORS TO SEND CONTROL PACKET"); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 58 | return STATUS_FAILURE; |
| 59 | } |
| 60 | |
| 61 | /* Update the netdevice statistics */ |
| 62 | /* Dump Packet */ |
| 63 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Leader Status: %x", PLeader->Status); |
| 64 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Leader VCID: %x",PLeader->Vcid); |
| 65 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Leader Length: %x",PLeader->PLength); |
| 66 | if(Adapter->device_removed) |
| 67 | return 0; |
Stephen Hemminger | 349fa79 | 2010-11-01 14:09:05 -0400 | [diff] [blame] | 68 | |
| 69 | if (netif_msg_pktdata(Adapter)) |
| 70 | print_hex_dump(KERN_DEBUG, PFX "tx control: ", DUMP_PREFIX_NONE, |
| 71 | 16, 1, pControlPacket, PLeader->PLength + LEADER_SIZE, 0); |
| 72 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 73 | Adapter->interface_transmit(Adapter->pvInterfaceAdapter, |
| 74 | pControlPacket, (PLeader->PLength + LEADER_SIZE)); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 75 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 76 | atomic_dec(&Adapter->CurrNumFreeTxDesc); |
| 77 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "<========="); |
| 78 | return STATUS_SUCCESS; |
| 79 | } |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 80 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 81 | /** |
| 82 | @ingroup tx_functions |
| 83 | This function despatches the IP packets with the given vcid |
| 84 | to the target via the host h/w interface. |
| 85 | @return zero(success) or -ve value(failure) |
| 86 | */ |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 87 | INT SetupNextSend(PMINI_ADAPTER Adapter, struct sk_buff *Packet, USHORT Vcid) |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 88 | { |
| 89 | int status=0; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 90 | BOOLEAN bHeaderSupressionEnabled = FALSE; |
| 91 | B_UINT16 uiClassifierRuleID; |
Stephen Hemminger | cacd922 | 2010-11-01 13:34:35 -0400 | [diff] [blame] | 92 | u16 QueueIndex = skb_get_queue_mapping(Packet); |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 93 | LEADER Leader={0}; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 94 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 95 | if(Packet->len > MAX_DEVICE_DESC_SIZE) |
| 96 | { |
| 97 | status = STATUS_FAILURE; |
| 98 | goto errExit; |
| 99 | } |
| 100 | |
| 101 | /* Get the Classifier Rule ID */ |
| 102 | uiClassifierRuleID = *((UINT32*) (Packet->cb)+SKB_CB_CLASSIFICATION_OFFSET); |
Stephen Hemminger | cacd922 | 2010-11-01 13:34:35 -0400 | [diff] [blame] | 103 | |
| 104 | bHeaderSupressionEnabled = Adapter->PackInfo[QueueIndex].bHeaderSuppressionEnabled |
| 105 | & Adapter->bPHSEnabled; |
| 106 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 107 | if(Adapter->device_removed) |
| 108 | { |
| 109 | status = STATUS_FAILURE; |
| 110 | goto errExit; |
| 111 | } |
| 112 | |
| 113 | status = PHSTransmit(Adapter, &Packet, Vcid, uiClassifierRuleID, bHeaderSupressionEnabled, |
| 114 | (UINT *)&Packet->len, Adapter->PackInfo[QueueIndex].bEthCSSupport); |
| 115 | |
| 116 | if(status != STATUS_SUCCESS) |
| 117 | { |
| 118 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "PHS Transmit failed..\n"); |
| 119 | goto errExit; |
| 120 | } |
| 121 | |
| 122 | Leader.Vcid = Vcid; |
| 123 | |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 124 | if(TCP_ACK == *((UINT32*) (Packet->cb) + SKB_CB_TCPACK_OFFSET )) |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 125 | Leader.Status = LEADER_STATUS_TCP_ACK; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 126 | else |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 127 | Leader.Status = LEADER_STATUS; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 128 | |
| 129 | if(Adapter->PackInfo[QueueIndex].bEthCSSupport) |
| 130 | { |
| 131 | Leader.PLength = Packet->len; |
| 132 | if(skb_headroom(Packet) < LEADER_SIZE) |
| 133 | { |
| 134 | if((status = skb_cow(Packet,LEADER_SIZE))) |
| 135 | { |
| 136 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"bcm_transmit : Failed To Increase headRoom\n"); |
| 137 | goto errExit; |
| 138 | } |
| 139 | } |
| 140 | skb_push(Packet, LEADER_SIZE); |
| 141 | memcpy(Packet->data, &Leader, LEADER_SIZE); |
| 142 | } |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 143 | else |
| 144 | { |
| 145 | Leader.PLength = Packet->len - ETH_HLEN; |
| 146 | memcpy((LEADER*)skb_pull(Packet, (ETH_HLEN - LEADER_SIZE)), &Leader, LEADER_SIZE); |
| 147 | } |
| 148 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 149 | status = Adapter->interface_transmit(Adapter->pvInterfaceAdapter, |
| 150 | Packet->data, (Leader.PLength + LEADER_SIZE)); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 151 | if(status) |
| 152 | { |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 153 | ++Adapter->dev->stats.tx_errors; |
| 154 | if (netif_msg_tx_err(Adapter)) |
| 155 | pr_info(PFX "%s: transmit error %d\n", Adapter->dev->name, |
| 156 | status); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 157 | } |
| 158 | else |
| 159 | { |
Andres Salomon | e6f597a | 2011-01-17 16:11:12 -0800 | [diff] [blame] | 160 | struct net_device_stats *netstats = &Adapter->dev->stats; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 161 | Adapter->PackInfo[QueueIndex].uiTotalTxBytes += Leader.PLength; |
Stephen Hemminger | cacd922 | 2010-11-01 13:34:35 -0400 | [diff] [blame] | 162 | |
Andres Salomon | e6f597a | 2011-01-17 16:11:12 -0800 | [diff] [blame] | 163 | netstats->tx_bytes += Leader.PLength; |
| 164 | ++netstats->tx_packets; |
Stephen Hemminger | cacd922 | 2010-11-01 13:34:35 -0400 | [diff] [blame] | 165 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 166 | Adapter->PackInfo[QueueIndex].uiCurrentTokenCount -= Leader.PLength << 3; |
| 167 | Adapter->PackInfo[QueueIndex].uiSentBytes += (Packet->len); |
| 168 | Adapter->PackInfo[QueueIndex].uiSentPackets++; |
| 169 | Adapter->PackInfo[QueueIndex].NumOfPacketsSent++; |
| 170 | |
| 171 | atomic_dec(&Adapter->PackInfo[QueueIndex].uiPerSFTxResourceCount); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 172 | Adapter->PackInfo[QueueIndex].uiThisPeriodSentBytes += Leader.PLength; |
| 173 | } |
| 174 | |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 175 | atomic_dec(&Adapter->CurrNumFreeTxDesc); |
| 176 | |
| 177 | errExit: |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 178 | |
Stephen Hemminger | 082e889 | 2010-11-01 09:35:21 -0400 | [diff] [blame] | 179 | dev_kfree_skb(Packet); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 180 | return status; |
| 181 | } |
| 182 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 183 | static int tx_pending(PMINI_ADAPTER Adapter) |
| 184 | { |
| 185 | return (atomic_read(&Adapter->TxPktAvail) |
| 186 | && MINIMUM_PENDING_DESCRIPTORS < atomic_read(&Adapter->CurrNumFreeTxDesc)) |
| 187 | || Adapter->device_removed || (1 == Adapter->downloadDDR); |
| 188 | } |
| 189 | |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 190 | /** |
| 191 | @ingroup tx_functions |
| 192 | Transmit thread |
| 193 | */ |
| 194 | int tx_pkt_handler(PMINI_ADAPTER Adapter /**< pointer to adapter object*/ |
| 195 | ) |
| 196 | { |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 197 | int status = 0; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 198 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 199 | while(! kthread_should_stop()) { |
| 200 | /* FIXME - the timeout looks like workaround for racey usage of TxPktAvail */ |
| 201 | if(Adapter->LinkUpStatus) |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 202 | wait_event_timeout(Adapter->tx_packet_wait_queue, |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 203 | tx_pending(Adapter), msecs_to_jiffies(10)); |
| 204 | else |
| 205 | wait_event_interruptible(Adapter->tx_packet_wait_queue, |
| 206 | tx_pending(Adapter)); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 207 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 208 | if (Adapter->device_removed) |
| 209 | break; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 210 | |
| 211 | if(Adapter->downloadDDR == 1) |
| 212 | { |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 213 | Adapter->downloadDDR +=1; |
| 214 | status = download_ddr_settings(Adapter); |
| 215 | if(status) |
Stephen Hemminger | ac1b1ae | 2010-11-01 12:20:09 -0400 | [diff] [blame] | 216 | pr_err(PFX "DDR DOWNLOAD FAILED! %d\n", status); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 217 | continue; |
| 218 | } |
| 219 | |
| 220 | //Check end point for halt/stall. |
| 221 | if(Adapter->bEndPointHalted == TRUE) |
| 222 | { |
| 223 | Bcm_clear_halt_of_endpoints(Adapter); |
| 224 | Adapter->bEndPointHalted = FALSE; |
| 225 | StartInterruptUrb((PS_INTERFACE_ADAPTER)(Adapter->pvInterfaceAdapter)); |
| 226 | } |
| 227 | |
| 228 | if(Adapter->LinkUpStatus && !Adapter->IdleMode) |
| 229 | { |
| 230 | if(atomic_read(&Adapter->TotalPacketCount)) |
| 231 | { |
| 232 | update_per_sf_desc_cnts(Adapter); |
| 233 | } |
| 234 | } |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 235 | |
| 236 | if( atomic_read(&Adapter->CurrNumFreeTxDesc) && |
| 237 | Adapter->LinkStatus == SYNC_UP_REQUEST && |
| 238 | !Adapter->bSyncUpRequestSent) |
| 239 | { |
| 240 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Calling LinkMessage"); |
| 241 | LinkMessage(Adapter); |
| 242 | } |
| 243 | |
| 244 | if((Adapter->IdleMode || Adapter->bShutStatus) && atomic_read(&Adapter->TotalPacketCount)) |
| 245 | { |
| 246 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Device in Low Power mode...waking up"); |
| 247 | Adapter->usIdleModePattern = ABORT_IDLE_MODE; |
| 248 | Adapter->bWakeUpDevice = TRUE; |
| 249 | wake_up(&Adapter->process_rx_cntrlpkt); |
| 250 | } |
| 251 | |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 252 | transmit_packets(Adapter); |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 253 | |
| 254 | atomic_set(&Adapter->TxPktAvail, 0); |
| 255 | } |
Stephen Hemminger | 71e253b | 2010-11-01 09:49:30 -0400 | [diff] [blame] | 256 | |
| 257 | BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL, "Exiting the tx thread..\n"); |
| 258 | Adapter->transmit_packet_thread = NULL; |
Stephen Hemminger | f8942e0 | 2010-09-08 14:46:36 -0700 | [diff] [blame] | 259 | return 0; |
| 260 | } |