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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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c837c549ab
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
271 lines
7.5 KiB
C
271 lines
7.5 KiB
C
/**
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* @file Transmit.c
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* @defgroup tx_functions Transmission
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* @section Queueing
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* @dot
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* digraph transmit1 {
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* node[shape=box]
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* edge[weight=5;color=red]
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*
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* bcm_transmit->GetPacketQueueIndex[label="IP Packet"]
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* GetPacketQueueIndex->IpVersion4[label="IPV4"]
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* GetPacketQueueIndex->IpVersion6[label="IPV6"]
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* }
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*
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* @enddot
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*
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* @section De-Queueing
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* @dot
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* digraph transmit2 {
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* node[shape=box]
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* edge[weight=5;color=red]
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* interrupt_service_thread->transmit_packets
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* tx_pkt_hdler->transmit_packets
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* transmit_packets->CheckAndSendPacketFromIndex
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* transmit_packets->UpdateTokenCount
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* CheckAndSendPacketFromIndex->PruneQueue
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* CheckAndSendPacketFromIndex->IsPacketAllowedForFlow
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* CheckAndSendPacketFromIndex->SendControlPacket[label="control pkt"]
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* SendControlPacket->bcm_cmd53
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* CheckAndSendPacketFromIndex->SendPacketFromQueue[label="data pkt"]
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* SendPacketFromQueue->SetupNextSend->bcm_cmd53
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* }
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* @enddot
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*/
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#include "headers.h"
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/**
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* @ingroup ctrl_pkt_functions
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* This function dispatches control packet to the h/w interface
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* @return zero(success) or -ve value(failure)
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*/
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int SendControlPacket(struct bcm_mini_adapter *Adapter, char *pControlPacket)
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{
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struct bcm_leader *PLeader = (struct bcm_leader *)pControlPacket;
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Tx");
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if (!pControlPacket || !Adapter) {
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL,
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"Got NULL Control Packet or Adapter");
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return STATUS_FAILURE;
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}
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if ((atomic_read(&Adapter->CurrNumFreeTxDesc) <
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((PLeader->PLength-1)/MAX_DEVICE_DESC_SIZE)+1)) {
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL,
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"NO FREE DESCRIPTORS TO SEND CONTROL PACKET");
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return STATUS_FAILURE;
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}
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/* Update the netdevice statistics */
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/* Dump Packet */
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL,
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"Leader Status: %x", PLeader->Status);
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL,
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"Leader VCID: %x", PLeader->Vcid);
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL,
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"Leader Length: %x", PLeader->PLength);
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if (Adapter->device_removed)
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return 0;
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if (netif_msg_pktdata(Adapter))
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print_hex_dump(KERN_DEBUG, PFX "tx control: ", DUMP_PREFIX_NONE,
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16, 1, pControlPacket,
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PLeader->PLength + LEADER_SIZE, 0);
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Adapter->interface_transmit(Adapter->pvInterfaceAdapter,
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pControlPacket,
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(PLeader->PLength + LEADER_SIZE));
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atomic_dec(&Adapter->CurrNumFreeTxDesc);
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL,
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"<=========");
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return STATUS_SUCCESS;
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}
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/**
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* @ingroup tx_functions
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* This function despatches the IP packets with the given vcid
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* to the target via the host h/w interface.
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* @return zero(success) or -ve value(failure)
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*/
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int SetupNextSend(struct bcm_mini_adapter *Adapter,
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struct sk_buff *Packet, USHORT Vcid)
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{
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int status = 0;
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bool bHeaderSupressionEnabled = false;
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B_UINT16 uiClassifierRuleID;
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u16 QueueIndex = skb_get_queue_mapping(Packet);
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struct bcm_packet_info *curr_packet_info =
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&Adapter->PackInfo[QueueIndex];
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struct bcm_leader Leader = {0};
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if (Packet->len > MAX_DEVICE_DESC_SIZE) {
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status = STATUS_FAILURE;
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goto errExit;
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}
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/* Get the Classifier Rule ID */
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uiClassifierRuleID = *((UINT32 *) (Packet->cb) +
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SKB_CB_CLASSIFICATION_OFFSET);
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bHeaderSupressionEnabled = curr_packet_info->bHeaderSuppressionEnabled &
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Adapter->bPHSEnabled;
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if (Adapter->device_removed) {
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status = STATUS_FAILURE;
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goto errExit;
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}
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status = PHSTransmit(Adapter, &Packet, Vcid, uiClassifierRuleID,
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bHeaderSupressionEnabled,
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(UINT *)&Packet->len,
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curr_packet_info->bEthCSSupport);
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if (status != STATUS_SUCCESS) {
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,
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"PHS Transmit failed..\n");
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goto errExit;
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}
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Leader.Vcid = Vcid;
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if (TCP_ACK == *((UINT32 *) (Packet->cb) + SKB_CB_TCPACK_OFFSET))
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Leader.Status = LEADER_STATUS_TCP_ACK;
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else
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Leader.Status = LEADER_STATUS;
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if (curr_packet_info->bEthCSSupport) {
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Leader.PLength = Packet->len;
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if (skb_headroom(Packet) < LEADER_SIZE) {
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status = skb_cow(Packet, LEADER_SIZE);
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if (status) {
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND,
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DBG_LVL_ALL,
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"bcm_transmit : Failed To Increase headRoom\n");
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goto errExit;
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}
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}
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skb_push(Packet, LEADER_SIZE);
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memcpy(Packet->data, &Leader, LEADER_SIZE);
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} else {
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Leader.PLength = Packet->len - ETH_HLEN;
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memcpy((struct bcm_leader *)skb_pull(Packet,
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(ETH_HLEN - LEADER_SIZE)),
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&Leader,
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LEADER_SIZE);
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}
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status = Adapter->interface_transmit(Adapter->pvInterfaceAdapter,
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Packet->data,
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(Leader.PLength + LEADER_SIZE));
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if (status) {
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++Adapter->dev->stats.tx_errors;
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if (netif_msg_tx_err(Adapter))
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pr_info(PFX "%s: transmit error %d\n",
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Adapter->dev->name,
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status);
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} else {
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struct net_device_stats *netstats = &Adapter->dev->stats;
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curr_packet_info->uiTotalTxBytes += Leader.PLength;
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netstats->tx_bytes += Leader.PLength;
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++netstats->tx_packets;
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curr_packet_info->uiCurrentTokenCount -= Leader.PLength << 3;
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curr_packet_info->uiSentBytes += (Packet->len);
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curr_packet_info->uiSentPackets++;
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curr_packet_info->NumOfPacketsSent++;
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atomic_dec(&curr_packet_info->uiPerSFTxResourceCount);
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curr_packet_info->uiThisPeriodSentBytes += Leader.PLength;
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}
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atomic_dec(&Adapter->CurrNumFreeTxDesc);
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errExit:
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dev_kfree_skb(Packet);
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return status;
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}
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static int tx_pending(struct bcm_mini_adapter *Adapter)
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{
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return (atomic_read(&Adapter->TxPktAvail)
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&& MINIMUM_PENDING_DESCRIPTORS <
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atomic_read(&Adapter->CurrNumFreeTxDesc))
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|| Adapter->device_removed || (1 == Adapter->downloadDDR);
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}
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/**
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* @ingroup tx_functions
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* Transmit thread
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*/
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int tx_pkt_handler(struct bcm_mini_adapter *Adapter)
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{
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int status = 0;
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while (!kthread_should_stop()) {
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/* FIXME - the timeout looks like workaround
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* for racey usage of TxPktAvail
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*/
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if (Adapter->LinkUpStatus)
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wait_event_timeout(Adapter->tx_packet_wait_queue,
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tx_pending(Adapter),
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msecs_to_jiffies(10));
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else
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wait_event_interruptible(Adapter->tx_packet_wait_queue,
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tx_pending(Adapter));
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if (Adapter->device_removed)
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break;
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if (Adapter->downloadDDR == 1) {
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Adapter->downloadDDR += 1;
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status = download_ddr_settings(Adapter);
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if (status)
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pr_err(PFX "DDR DOWNLOAD FAILED! %d\n", status);
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continue;
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}
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/* Check end point for halt/stall. */
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if (Adapter->bEndPointHalted == TRUE) {
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Bcm_clear_halt_of_endpoints(Adapter);
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Adapter->bEndPointHalted = false;
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StartInterruptUrb((struct bcm_interface_adapter *)
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(Adapter->pvInterfaceAdapter));
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}
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if (Adapter->LinkUpStatus && !Adapter->IdleMode) {
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if (atomic_read(&Adapter->TotalPacketCount))
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update_per_sf_desc_cnts(Adapter);
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}
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if (atomic_read(&Adapter->CurrNumFreeTxDesc) &&
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Adapter->LinkStatus == SYNC_UP_REQUEST &&
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!Adapter->bSyncUpRequestSent) {
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS,
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DBG_LVL_ALL, "Calling LinkMessage");
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LinkMessage(Adapter);
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}
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if ((Adapter->IdleMode || Adapter->bShutStatus) &&
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atomic_read(&Adapter->TotalPacketCount)) {
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX,
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TX_PACKETS, DBG_LVL_ALL,
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"Device in Low Power mode...waking up");
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Adapter->usIdleModePattern = ABORT_IDLE_MODE;
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Adapter->bWakeUpDevice = TRUE;
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wake_up(&Adapter->process_rx_cntrlpkt);
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}
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transmit_packets(Adapter);
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atomic_set(&Adapter->TxPktAvail, 0);
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}
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BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, TX_PACKETS, DBG_LVL_ALL,
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"Exiting the tx thread..\n");
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Adapter->transmit_packet_thread = NULL;
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return 0;
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}
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