buslogic.c

讲述linux的初始化过程

  if (BusLogic_Command(HostAdapter,
		       BusLogic_InquireExtendedSetupInformation,
		       &RequestedReplyLength,
		       sizeof(RequestedReplyLength),
		       &ExtendedSetupInformation,
		       sizeof(ExtendedSetupInformation))
      != sizeof(ExtendedSetupInformation))
    Result = false;
  /*
    Provide tracing information if requested and return.
  */
  if (BusLogic_GlobalOptions.TraceProbe)
    BusLogic_Notice("BusLogic_Check(0x%X): MultiMaster %s\n", HostAdapter,
		    HostAdapter->IO_Address, (Result ? "Found" : "Not Found"));
  return Result;
}


/*
  BusLogic_ReadHostAdapterConfiguration reads the Configuration Information
  from Host Adapter and initializes the Host Adapter structure.
*/

static boolean BusLogic_ReadHostAdapterConfiguration(BusLogic_HostAdapter_T
						     *HostAdapter)
{
  BusLogic_BoardID_T BoardID;
  BusLogic_Configuration_T Configuration;
  BusLogic_SetupInformation_T SetupInformation;
  BusLogic_ExtendedSetupInformation_T ExtendedSetupInformation;
  BusLogic_HostAdapterModelNumber_T HostAdapterModelNumber;
  BusLogic_FirmwareVersion3rdDigit_T FirmwareVersion3rdDigit;
  BusLogic_FirmwareVersionLetter_T FirmwareVersionLetter;
  BusLogic_PCIHostAdapterInformation_T PCIHostAdapterInformation;
  BusLogic_FetchHostAdapterLocalRAMRequest_T FetchHostAdapterLocalRAMRequest;
  BusLogic_AutoSCSIData_T AutoSCSIData;
  BusLogic_GeometryRegister_T GeometryRegister;
  BusLogic_RequestedReplyLength_T RequestedReplyLength;
  unsigned char *TargetPointer, Character;
  int TargetID, i;
  /*
    Configuration Information for FlashPoint Host Adapters is provided in the
    FlashPoint_Info structure by the FlashPoint SCCB Manager's Probe Function.
    Initialize fields in the Host Adapter structure from the FlashPoint_Info
    structure.
  */
  if (BusLogic_FlashPointHostAdapterP(HostAdapter))
    {
      FlashPoint_Info_T *FlashPointInfo = &HostAdapter->FlashPointInfo;
      TargetPointer = HostAdapter->ModelName;
      *TargetPointer++ = 'B';
      *TargetPointer++ = 'T';
      *TargetPointer++ = '-';
      for (i = 0; i < sizeof(FlashPointInfo->ModelNumber); i++)
	*TargetPointer++ = FlashPointInfo->ModelNumber[i];
      *TargetPointer++ = '\0';
      strcpy(HostAdapter->FirmwareVersion, FlashPoint_FirmwareVersion);
      HostAdapter->SCSI_ID = FlashPointInfo->SCSI_ID;
      HostAdapter->ExtendedTranslationEnabled =
	FlashPointInfo->ExtendedTranslationEnabled;
      HostAdapter->ParityCheckingEnabled =
	FlashPointInfo->ParityCheckingEnabled;
      HostAdapter->BusResetEnabled = !FlashPointInfo->HostSoftReset;
      HostAdapter->LevelSensitiveInterrupt = true;
      HostAdapter->HostWideSCSI = FlashPointInfo->HostWideSCSI;
      HostAdapter->HostDifferentialSCSI = false;
      HostAdapter->HostSupportsSCAM = true;
      HostAdapter->HostUltraSCSI = true;
      HostAdapter->ExtendedLUNSupport = true;
      HostAdapter->TerminationInfoValid = true;
      HostAdapter->LowByteTerminated = FlashPointInfo->LowByteTerminated;
      HostAdapter->HighByteTerminated = FlashPointInfo->HighByteTerminated;
      HostAdapter->SCAM_Enabled = FlashPointInfo->SCAM_Enabled;
      HostAdapter->SCAM_Level2 = FlashPointInfo->SCAM_Level2;
      HostAdapter->DriverScatterGatherLimit = BusLogic_ScatterGatherLimit;
      HostAdapter->MaxTargetDevices = (HostAdapter->HostWideSCSI ? 16 : 8);
      HostAdapter->MaxLogicalUnits = 32;
      HostAdapter->InitialCCBs = 4 * BusLogic_CCB_AllocationGroupSize;
      HostAdapter->IncrementalCCBs = BusLogic_CCB_AllocationGroupSize;
      HostAdapter->DriverQueueDepth = 255;
      HostAdapter->HostAdapterQueueDepth = HostAdapter->DriverQueueDepth;
      HostAdapter->SynchronousPermitted = FlashPointInfo->SynchronousPermitted;
      HostAdapter->FastPermitted = FlashPointInfo->FastPermitted;
      HostAdapter->UltraPermitted = FlashPointInfo->UltraPermitted;
      HostAdapter->WidePermitted = FlashPointInfo->WidePermitted;
      HostAdapter->DisconnectPermitted = FlashPointInfo->DisconnectPermitted;
      HostAdapter->TaggedQueuingPermitted = 0xFFFF;
      goto Common;
    }
  /*
    Issue the Inquire Board ID command.
  */
  if (BusLogic_Command(HostAdapter, BusLogic_InquireBoardID, NULL, 0,
		       &BoardID, sizeof(BoardID)) != sizeof(BoardID))
    return BusLogic_Failure(HostAdapter, "INQUIRE BOARD ID");
  /*
    Issue the Inquire Configuration command.
  */
  if (BusLogic_Command(HostAdapter, BusLogic_InquireConfiguration, NULL, 0,
		       &Configuration, sizeof(Configuration))
      != sizeof(Configuration))
    return BusLogic_Failure(HostAdapter, "INQUIRE CONFIGURATION");
  /*
    Issue the Inquire Setup Information command.
  */
  RequestedReplyLength = sizeof(SetupInformation);
  if (BusLogic_Command(HostAdapter, BusLogic_InquireSetupInformation,
		       &RequestedReplyLength, sizeof(RequestedReplyLength),
		       &SetupInformation, sizeof(SetupInformation))
      != sizeof(SetupInformation))
    return BusLogic_Failure(HostAdapter, "INQUIRE SETUP INFORMATION");
  /*
    Issue the Inquire Extended Setup Information command.
  */
  RequestedReplyLength = sizeof(ExtendedSetupInformation);
  if (BusLogic_Command(HostAdapter, BusLogic_InquireExtendedSetupInformation,
		       &RequestedReplyLength, sizeof(RequestedReplyLength),
		       &ExtendedSetupInformation,
		       sizeof(ExtendedSetupInformation))
      != sizeof(ExtendedSetupInformation))
    return BusLogic_Failure(HostAdapter, "INQUIRE EXTENDED SETUP INFORMATION");
  /*
    Issue the Inquire Firmware Version 3rd Digit command.
  */
  FirmwareVersion3rdDigit = '\0';
  if (BoardID.FirmwareVersion1stDigit > '0')
    if (BusLogic_Command(HostAdapter, BusLogic_InquireFirmwareVersion3rdDigit,
			 NULL, 0, &FirmwareVersion3rdDigit,
			 sizeof(FirmwareVersion3rdDigit))
	!= sizeof(FirmwareVersion3rdDigit))
      return BusLogic_Failure(HostAdapter, "INQUIRE FIRMWARE 3RD DIGIT");
  /*
    Issue the Inquire Host Adapter Model Number command.
  */
  if (ExtendedSetupInformation.BusType == 'A' &&
      BoardID.FirmwareVersion1stDigit == '2')
    /* BusLogic BT-542B ISA 2.xx */
    strcpy(HostAdapterModelNumber, "542B");
  else if (ExtendedSetupInformation.BusType == 'E' &&
	   BoardID.FirmwareVersion1stDigit == '2' &&
	   (BoardID.FirmwareVersion2ndDigit <= '1' ||
	    (BoardID.FirmwareVersion2ndDigit == '2' &&
	     FirmwareVersion3rdDigit == '0')))
    /* BusLogic BT-742A EISA 2.1x or 2.20 */
    strcpy(HostAdapterModelNumber, "742A");
  else if (ExtendedSetupInformation.BusType == 'E' &&
	   BoardID.FirmwareVersion1stDigit == '0')
    /* AMI FastDisk EISA Series 441 0.x */
    strcpy(HostAdapterModelNumber, "747A");
  else
    {
      RequestedReplyLength = sizeof(HostAdapterModelNumber);
      if (BusLogic_Command(HostAdapter, BusLogic_InquireHostAdapterModelNumber,
			   &RequestedReplyLength, sizeof(RequestedReplyLength),
			   &HostAdapterModelNumber,
			   sizeof(HostAdapterModelNumber))
	  != sizeof(HostAdapterModelNumber))
	return BusLogic_Failure(HostAdapter,
				"INQUIRE HOST ADAPTER MODEL NUMBER");
    }
  /*
    BusLogic MultiMaster Host Adapters can be identified by their model number
    and the major version number of their firmware as follows:

    5.xx	BusLogic "W" Series Host Adapters:
		  BT-948/958/958D
    4.xx	BusLogic "C" Series Host Adapters:
		  BT-946C/956C/956CD/747C/757C/757CD/445C/545C/540CF
    3.xx	BusLogic "S" Series Host Adapters:
		  BT-747S/747D/757S/757D/445S/545S/542D
		  BT-542B/742A (revision H)
    2.xx	BusLogic "A" Series Host Adapters:
		  BT-542B/742A (revision G and below)
    0.xx	AMI FastDisk VLB/EISA BusLogic Clone Host Adapter
  */
  /*
    Save the Model Name and Host Adapter Name in the Host Adapter structure.
  */
  TargetPointer = HostAdapter->ModelName;
  *TargetPointer++ = 'B';
  *TargetPointer++ = 'T';
  *TargetPointer++ = '-';
  for (i = 0; i < sizeof(HostAdapterModelNumber); i++)
    {
      Character = HostAdapterModelNumber[i];
      if (Character == ' ' || Character == '\0') break;
      *TargetPointer++ = Character;
    }
  *TargetPointer++ = '\0';
  /*
    Save the Firmware Version in the Host Adapter structure.
  */
  TargetPointer = HostAdapter->FirmwareVersion;
  *TargetPointer++ = BoardID.FirmwareVersion1stDigit;
  *TargetPointer++ = '.';
  *TargetPointer++ = BoardID.FirmwareVersion2ndDigit;
  if (FirmwareVersion3rdDigit != ' ' && FirmwareVersion3rdDigit != '\0')
    *TargetPointer++ = FirmwareVersion3rdDigit;
  *TargetPointer = '\0';
  /*
    Issue the Inquire Firmware Version Letter command.
  */
  if (strcmp(HostAdapter->FirmwareVersion, "3.3") >= 0)
    {
      if (BusLogic_Command(HostAdapter, BusLogic_InquireFirmwareVersionLetter,
			   NULL, 0, &FirmwareVersionLetter,
			   sizeof(FirmwareVersionLetter))
	  != sizeof(FirmwareVersionLetter))
	return BusLogic_Failure(HostAdapter,
				"INQUIRE FIRMWARE VERSION LETTER");
      if (FirmwareVersionLetter != ' ' && FirmwareVersionLetter != '\0')
	*TargetPointer++ = FirmwareVersionLetter;
      *TargetPointer = '\0';
    }
  /*
    Save the Host Adapter SCSI ID in the Host Adapter structure.
  */
  HostAdapter->SCSI_ID = Configuration.HostAdapterID;
  /*
    Determine the Bus Type and save it in the Host Adapter structure, determine
    and save the IRQ Channel if necessary, and determine and save the DMA
    Channel for ISA Host Adapters.
  */
  HostAdapter->HostAdapterBusType =
    BusLogic_HostAdapterBusTypes[HostAdapter->ModelName[3] - '4'];
  if (HostAdapter->IRQ_Channel == 0)
    {
      if (Configuration.IRQ_Channel9)
	HostAdapter->IRQ_Channel = 9;
      else if (Configuration.IRQ_Channel10)
	HostAdapter->IRQ_Channel = 10;
      else if (Configuration.IRQ_Channel11)
	HostAdapter->IRQ_Channel = 11;
      else if (Configuration.IRQ_Channel12)
	HostAdapter->IRQ_Channel = 12;
      else if (Configuration.IRQ_Channel14)
	HostAdapter->IRQ_Channel = 14;
      else if (Configuration.IRQ_Channel15)
	HostAdapter->IRQ_Channel = 15;
    }
  if (HostAdapter->HostAdapterBusType == BusLogic_ISA_Bus)
    {
      if (Configuration.DMA_Channel5)
	HostAdapter->DMA_Channel = 5;
      else if (Configuration.DMA_Channel6)
	HostAdapter->DMA_Channel = 6;
      else if (Configuration.DMA_Channel7)
	HostAdapter->DMA_Channel = 7;
    }
  /*
    Determine whether Extended Translation is enabled and save it in
    the Host Adapter structure.
  */
  GeometryRegister.All = BusLogic_ReadGeometryRegister(HostAdapter);
  HostAdapter->ExtendedTranslationEnabled =
    GeometryRegister.Bits.ExtendedTranslationEnabled;
  /*
    Save the Scatter Gather Limits, Level Sensitive Interrupt flag, Wide
    SCSI flag, Differential SCSI flag, SCAM Supported flag, and
    Ultra SCSI flag in the Host Adapter structure.
  */
  HostAdapter->HostAdapterScatterGatherLimit =
    ExtendedSetupInformation.ScatterGatherLimit;
  HostAdapter->DriverScatterGatherLimit =
    HostAdapter->HostAdapterScatterGatherLimit;
  if (HostAdapter->HostAdapterScatterGatherLimit > BusLogic_ScatterGatherLimit)
    HostAdapter->DriverScatterGatherLimit = BusLogic_ScatterGatherLimit;
  if (ExtendedSetupInformation.Misc.LevelSensitiveInterrupt)
    HostAdapter->LevelSensitiveInterrupt = true;
  HostAdapter->HostWideSCSI = ExtendedSetupInformation.HostWideSCSI;
  HostAdapter->HostDifferentialSCSI =
    ExtendedSetupInformation.HostDifferentialSCSI;
  HostAdapter->HostSupportsSCAM = ExtendedSetupInformation.HostSupportsSCAM;
  HostAdapter->HostUltraSCSI = ExtendedSetupInformation.HostUltraSCSI;
  /*
    Determine whether Extended LUN Format CCBs are supported and save the
    information in the Host Adapter structure.
  */
  if (HostAdapter->FirmwareVersion[0] == '5' ||
      (HostAdapter->FirmwareVersion[0] == '4' && HostAdapter->HostWideSCSI))
    HostAdapter->ExtendedLUNSupport = true;
  /*
    Issue the Inquire PCI Host Adapter Information command to read the
    Termination Information from "W" series MultiMaster Host Adapters.
  */
  if (HostAdapter->FirmwareVersion[0] == '5')
    {
      if (BusLogic_Command(HostAdapter,
			   BusLogic_InquirePCIHostAdapterInformation,
			   NULL, 0, &PCIHostAdapterInformation,
			   sizeof(PCIHostAdapterInformation))
	  != sizeof(PCIHostAdapterInformation))
	return BusLogic_Failure(HostAdapter,
				"INQUIRE PCI HOST ADAPTER INFORMATION");
      /*
	Save the Termination Information in the Host Adapter structure.
      */
      if (PCIHostAdapterInformation.GenericInfoValid)
	{
	  HostAdapter->TerminationInfoValid = true;
	  HostAdapter->LowByteTerminated =
	    PCIHostAdapterInformation.LowByteTerminated;
	  HostAdapter->HighByteTerminated =
	    PCIHostAdapterInformation.HighByteTerminated;
	}
    }
  /*
    Issue the Fetch Host Adapter Local RAM command to read the AutoSCSI data
    from "W" and "C" series MultiMaster Host Adapters.
  */
  if (HostAdapter->FirmwareVersion[0] >= '4')
    {
      FetchHostAdapterLocalRAMRequest.ByteOffset =
	BusLogic_AutoSCSI_BaseOffset;
      FetchHostAdapterLocalRAMRequest.ByteCount = sizeof(AutoSCSIData);
      if (BusLogic_Command(HostAdapter,
			   BusLogic_FetchHostAdapterLocalRAM,
			   &FetchHostAdapterLocalRAMRequest,
			   sizeof(FetchHostAdapterLocalRAMRequest),
			   &AutoSCSIData, sizeof(AutoSCSIData))
	  != sizeof(AutoSCSIData))
	return BusLogic_Failure(HostAdapter, "FETCH HOST ADAPTER LOCAL RAM");
      /*
	Save the Parity Checking Enabled, Bus Reset Enabled, and Termination
	Information in the Host Adapter structure.
      */
      HostAdapter->ParityCheckingEnabled = AutoSCSIData.ParityCheckingEnabled;
      HostAdapter->BusResetEnabled = AutoSCSIData.BusResetEnabled;
      if (HostAdapter->FirmwareVersion[0] == '4')
	{
	  HostAdapter->TerminationInfoValid = true;
	  HostAdapter->LowByteTerminated = AutoSCSIData.LowByteTerminated;
	  HostAdapter->HighByteTerminated = AutoSCSIData.HighByteTerminated;
	}
      /*
	Save the Wide Permitted, Fast Permitted, Synchronous Permitted,
	Disconnect Permitted, Ultra Permitted, and SCAM Information in the
	Host Adapter structure.
      */
      HostAdapter->WidePermitted = AutoSCSIData.WidePermitted;
      HostAdapter->FastPermitted = AutoSCSIData.FastPermitted;
      HostAdapter->SynchronousPermitted =
	AutoSCSIData.SynchronousPermitted;
      HostAdapter->DisconnectPermitted =
	AutoSCSIData.DisconnectPermitted;
      if (HostAdapter->HostUltraSCSI)
	HostAdapter->UltraPermitted = AutoSCSIData.UltraPermitted;
      if (HostAdapter->HostSupportsSCAM)
	{
	  HostAdapter->SCAM_Enabled = AutoSCSIData.SCAM_Enabled;
	  HostAdapter->SCAM_Level2 = AutoSCSIData.SCAM_Level2;
	}
    }
  /*
    Initialize fields in the Host Adapter structure for "S" and "A" series
    MultiMaster Host Adapters.
  */
  if (HostAdapter->FirmwareVersion[0] < '4')
    {
      if (SetupInformation.SynchronousInitiationEnabled)