dac960.c

讲述linux的初始化过程

	  DCDB->EarlyStatus = false;
	  DCDB->Timeout = DAC960_V1_DCDB_Timeout_10_seconds;
	  DCDB->NoAutomaticRequestSense = false;
	  DCDB->DisconnectPermitted = true;
	  DCDB->TransferLength = sizeof(DAC960_SCSI_Inquiry_T);
	  DCDB->BusAddress = Virtual_to_Bus(InquiryStandardData);
	  DCDB->CDBLength = 6;
	  DCDB->TransferLengthHigh4 = 0;
	  DCDB->SenseLength = sizeof(DCDB->SenseData);
	  DCDB->CDB[0] = 0x12; /* INQUIRY */
	  DCDB->CDB[1] = 0; /* EVPD = 0 */
	  DCDB->CDB[2] = 0; /* Page Code */
	  DCDB->CDB[3] = 0; /* Reserved */
	  DCDB->CDB[4] = sizeof(DAC960_SCSI_Inquiry_T);
	  DCDB->CDB[5] = 0; /* Control */
	  DAC960_AcquireControllerLock(Controller, &ProcessorFlags);
	  DAC960_QueueCommand(Command);
	  DAC960_ReleaseControllerLock(Controller, &ProcessorFlags);
	}
      for (Channel = 0; Channel < Controller->Channels; Channel++)
	{
	  DAC960_Command_T *Command = Controller->Commands[Channel];
	  DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
	    &Controller->V1.InquiryUnitSerialNumber[Channel][TargetID];
	  InquiryUnitSerialNumber->PeripheralDeviceType = 0x1F;
	  Semaphore = &Semaphores[Channel];
	  down(Semaphore);
	  if (Command->V1.CommandStatus != DAC960_V1_NormalCompletion)
	    continue;
	  Command->Semaphore = Semaphore;
	  DCDB = &DCDBs[Channel];
	  DCDB->TransferLength = sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
	  DCDB->BusAddress = Virtual_to_Bus(InquiryUnitSerialNumber);
	  DCDB->SenseLength = sizeof(DCDB->SenseData);
	  DCDB->CDB[0] = 0x12; /* INQUIRY */
	  DCDB->CDB[1] = 1; /* EVPD = 1 */
	  DCDB->CDB[2] = 0x80; /* Page Code */
	  DCDB->CDB[3] = 0; /* Reserved */
	  DCDB->CDB[4] = sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
	  DCDB->CDB[5] = 0; /* Control */
	  DAC960_AcquireControllerLock(Controller, &ProcessorFlags);
	  DAC960_QueueCommand(Command);
	  DAC960_ReleaseControllerLock(Controller, &ProcessorFlags);
	  down(Semaphore);
	}
    }
  return true;
}


/*
  DAC960_V2_ReadDeviceConfiguration reads the Device Configuration Information
  for DAC960 V2 Firmware Controllers by requesting the Physical Device
  Information and SCSI Inquiry Unit Serial Number information for each
  device connected to Controller.
*/

static boolean DAC960_V2_ReadDeviceConfiguration(DAC960_Controller_T
						 *Controller)
{
  unsigned char Channel = 0, TargetID = 0, LogicalUnit = 0;
  unsigned short PhysicalDeviceIndex = 0;
  while (true)
    {
      DAC960_V2_PhysicalDeviceInfo_T *NewPhysicalDeviceInfo =
	&Controller->V2.NewPhysicalDeviceInformation;
      DAC960_V2_PhysicalDeviceInfo_T *PhysicalDeviceInfo;
      DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber;
      DAC960_Command_T *Command;
      DAC960_V2_CommandMailbox_T *CommandMailbox;
      if (!DAC960_V2_PhysicalDeviceInfo(Controller,
					DAC960_V2_GetPhysicalDeviceInfoValid,
					Channel,
					TargetID,
					LogicalUnit,
					NewPhysicalDeviceInfo,
					sizeof(DAC960_V2_PhysicalDeviceInfo_T)))
	  break;
      Channel = NewPhysicalDeviceInfo->Channel;
      TargetID = NewPhysicalDeviceInfo->TargetID;
      LogicalUnit = NewPhysicalDeviceInfo->LogicalUnit;
      PhysicalDeviceInfo = (DAC960_V2_PhysicalDeviceInfo_T *)
	kmalloc(sizeof(DAC960_V2_PhysicalDeviceInfo_T), GFP_ATOMIC);
      if (PhysicalDeviceInfo == NULL)
	return DAC960_Failure(Controller, "PHYSICAL DEVICE ALLOCATION");
      Controller->V2.PhysicalDeviceInformation[PhysicalDeviceIndex] =
	PhysicalDeviceInfo;
      memcpy(PhysicalDeviceInfo, NewPhysicalDeviceInfo,
	     sizeof(DAC960_V2_PhysicalDeviceInfo_T));
      InquiryUnitSerialNumber = (DAC960_SCSI_Inquiry_UnitSerialNumber_T *)
	kmalloc(sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T), GFP_ATOMIC);
      if (InquiryUnitSerialNumber == NULL)
	return DAC960_Failure(Controller, "SERIAL NUMBER ALLOCATION");
      Controller->V2.InquiryUnitSerialNumber[PhysicalDeviceIndex] =
	InquiryUnitSerialNumber;
      memset(InquiryUnitSerialNumber, 0,
	     sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
      InquiryUnitSerialNumber->PeripheralDeviceType = 0x1F;
      Command = DAC960_AllocateCommand(Controller);
      CommandMailbox = &Command->V2.CommandMailbox;
      DAC960_V2_ClearCommand(Command);
      Command->CommandType = DAC960_ImmediateCommand;
      CommandMailbox->SCSI_10.CommandOpcode = DAC960_V2_SCSI_10_Passthru;
      CommandMailbox->SCSI_10.CommandControlBits
			     .DataTransferControllerToHost = true;
      CommandMailbox->SCSI_10.CommandControlBits
			     .NoAutoRequestSense = true;
      CommandMailbox->SCSI_10.DataTransferSize =
	sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
      CommandMailbox->SCSI_10.PhysicalDevice.LogicalUnit = LogicalUnit;
      CommandMailbox->SCSI_10.PhysicalDevice.TargetID = TargetID;
      CommandMailbox->SCSI_10.PhysicalDevice.Channel = Channel;
      CommandMailbox->SCSI_10.CDBLength = 6;
      CommandMailbox->SCSI_10.SCSI_CDB[0] = 0x12; /* INQUIRY */
      CommandMailbox->SCSI_10.SCSI_CDB[1] = 1; /* EVPD = 1 */
      CommandMailbox->SCSI_10.SCSI_CDB[2] = 0x80; /* Page Code */
      CommandMailbox->SCSI_10.SCSI_CDB[3] = 0; /* Reserved */
      CommandMailbox->SCSI_10.SCSI_CDB[4] =
	sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
      CommandMailbox->SCSI_10.SCSI_CDB[5] = 0; /* Control */
      CommandMailbox->SCSI_10.DataTransferMemoryAddress
			     .ScatterGatherSegments[0]
			     .SegmentDataPointer =
	Virtual_to_Bus(InquiryUnitSerialNumber);
      CommandMailbox->SCSI_10.DataTransferMemoryAddress
			     .ScatterGatherSegments[0]
			     .SegmentByteCount =
	CommandMailbox->SCSI_10.DataTransferSize;
      DAC960_ExecuteCommand(Command);
      DAC960_DeallocateCommand(Command);
      PhysicalDeviceIndex++;
      LogicalUnit++;
    }
  return true;
}


/*
  DAC960_SanitizeInquiryData sanitizes the Vendor, Model, Revision, and
  Product Serial Number fields of the Inquiry Standard Data and Inquiry
  Unit Serial Number structures.
*/

static void DAC960_SanitizeInquiryData(DAC960_SCSI_Inquiry_T
					 *InquiryStandardData,
				       DAC960_SCSI_Inquiry_UnitSerialNumber_T
					 *InquiryUnitSerialNumber,
				       unsigned char *Vendor,
				       unsigned char *Model,
				       unsigned char *Revision,
				       unsigned char *SerialNumber)
{
  int SerialNumberLength, i;
  if (InquiryStandardData->PeripheralDeviceType == 0x1F) return;
  for (i = 0; i < sizeof(InquiryStandardData->VendorIdentification); i++)
    {
      unsigned char VendorCharacter =
	InquiryStandardData->VendorIdentification[i];
      Vendor[i] = (VendorCharacter >= ' ' && VendorCharacter <= '~'
		   ? VendorCharacter : ' ');
    }
  Vendor[sizeof(InquiryStandardData->VendorIdentification)] = '\0';
  for (i = 0; i < sizeof(InquiryStandardData->ProductIdentification); i++)
    {
      unsigned char ModelCharacter =
	InquiryStandardData->ProductIdentification[i];
      Model[i] = (ModelCharacter >= ' ' && ModelCharacter <= '~'
		  ? ModelCharacter : ' ');
    }
  Model[sizeof(InquiryStandardData->ProductIdentification)] = '\0';
  for (i = 0; i < sizeof(InquiryStandardData->ProductRevisionLevel); i++)
    {
      unsigned char RevisionCharacter =
	InquiryStandardData->ProductRevisionLevel[i];
      Revision[i] = (RevisionCharacter >= ' ' && RevisionCharacter <= '~'
		     ? RevisionCharacter : ' ');
    }
  Revision[sizeof(InquiryStandardData->ProductRevisionLevel)] = '\0';
  if (InquiryUnitSerialNumber->PeripheralDeviceType == 0x1F) return;
  SerialNumberLength = InquiryUnitSerialNumber->PageLength;
  if (SerialNumberLength >
      sizeof(InquiryUnitSerialNumber->ProductSerialNumber))
    SerialNumberLength = sizeof(InquiryUnitSerialNumber->ProductSerialNumber);
  for (i = 0; i < SerialNumberLength; i++)
    {
      unsigned char SerialNumberCharacter =
	InquiryUnitSerialNumber->ProductSerialNumber[i];
      SerialNumber[i] =
	(SerialNumberCharacter >= ' ' && SerialNumberCharacter <= '~'
	 ? SerialNumberCharacter : ' ');
    }
  SerialNumber[SerialNumberLength] = '\0';
}


/*
  DAC960_V1_ReportDeviceConfiguration reports the Device Configuration
  Information for DAC960 V1 Firmware Controllers.
*/

static boolean DAC960_V1_ReportDeviceConfiguration(DAC960_Controller_T
						   *Controller)
{
  int LogicalDriveNumber, Channel, TargetID;
  DAC960_Info("  Physical Devices:\n", Controller);
  for (Channel = 0; Channel < Controller->Channels; Channel++)
    for (TargetID = 0; TargetID < Controller->Targets; TargetID++)
      {
	DAC960_SCSI_Inquiry_T *InquiryStandardData =
	  &Controller->V1.InquiryStandardData[Channel][TargetID];
	DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
	  &Controller->V1.InquiryUnitSerialNumber[Channel][TargetID];
	DAC960_V1_DeviceState_T *DeviceState =
	  &Controller->V1.DeviceState[Channel][TargetID];
	DAC960_V1_ErrorTableEntry_T *ErrorEntry =
	  &Controller->V1.ErrorTable.ErrorTableEntries[Channel][TargetID];
	char Vendor[1+sizeof(InquiryStandardData->VendorIdentification)];
	char Model[1+sizeof(InquiryStandardData->ProductIdentification)];
	char Revision[1+sizeof(InquiryStandardData->ProductRevisionLevel)];
	char SerialNumber[1+sizeof(InquiryUnitSerialNumber
				   ->ProductSerialNumber)];
	if (InquiryStandardData->PeripheralDeviceType == 0x1F) continue;
	DAC960_SanitizeInquiryData(InquiryStandardData, InquiryUnitSerialNumber,
				   Vendor, Model, Revision, SerialNumber);
	DAC960_Info("    %d:%d%s Vendor: %s  Model: %s  Revision: %s\n",
		    Controller, Channel, TargetID, (TargetID < 10 ? " " : ""),
		    Vendor, Model, Revision);
	if (InquiryUnitSerialNumber->PeripheralDeviceType != 0x1F)
	  DAC960_Info("         Serial Number: %s\n", Controller, SerialNumber);
	if (DeviceState->Present &&
	    DeviceState->DeviceType == DAC960_V1_DiskType)
	  {
	    if (Controller->V1.DeviceResetCount[Channel][TargetID] > 0)
	      DAC960_Info("         Disk Status: %s, %d blocks, %d resets\n",
			  Controller,
			  (DeviceState->DeviceState == DAC960_V1_Device_Dead
			   ? "Dead"
			   : DeviceState->DeviceState
			     == DAC960_V1_Device_WriteOnly
			     ? "Write-Only"
			     : DeviceState->DeviceState
			       == DAC960_V1_Device_Online
			       ? "Online" : "Standby"),
			  DeviceState->DiskSize,
			  Controller->V1.DeviceResetCount[Channel][TargetID]);
	    else
	      DAC960_Info("         Disk Status: %s, %d blocks\n", Controller,
			  (DeviceState->DeviceState == DAC960_V1_Device_Dead
			   ? "Dead"
			   : DeviceState->DeviceState
			     == DAC960_V1_Device_WriteOnly
			     ? "Write-Only"
			     : DeviceState->DeviceState
			       == DAC960_V1_Device_Online
			       ? "Online" : "Standby"),
			  DeviceState->DiskSize);
	  }
	if (ErrorEntry->ParityErrorCount > 0 ||
	    ErrorEntry->SoftErrorCount > 0 ||
	    ErrorEntry->HardErrorCount > 0 ||
	    ErrorEntry->MiscErrorCount > 0)
	  DAC960_Info("         Errors - Parity: %d, Soft: %d, "
		      "Hard: %d, Misc: %d\n", Controller,
		      ErrorEntry->ParityErrorCount,
		      ErrorEntry->SoftErrorCount,
		      ErrorEntry->HardErrorCount,
		      ErrorEntry->MiscErrorCount);
      }
  DAC960_Info("  Logical Drives:\n", Controller);
  for (LogicalDriveNumber = 0;
       LogicalDriveNumber < Controller->LogicalDriveCount;
       LogicalDriveNumber++)
    {
      DAC960_V1_LogicalDriveInformation_T *LogicalDriveInformation =
	&Controller->V1.LogicalDriveInformation[LogicalDriveNumber];
      DAC960_Info("    /dev/rd/c%dd%d: RAID-%d, %s, %d blocks, %s\n",
		  Controller, Controller->ControllerNumber, LogicalDriveNumber,
		  LogicalDriveInformation->RAIDLevel,
		  (LogicalDriveInformation->LogicalDriveState
		   == DAC960_V1_LogicalDrive_Online
		   ? "Online"
		   : LogicalDriveInformation->LogicalDriveState
		     == DAC960_V1_LogicalDrive_Critical
		     ? "Critical" : "Offline"),
		  LogicalDriveInformation->LogicalDriveSize,
		  (LogicalDriveInformation->WriteBack
		   ? "Write Back" : "Write Thru"));
    }
  return true;
}


/*
  DAC960_V2_ReportDeviceConfiguration reports the Device Configuration
  Information for DAC960 V2 Firmware Controllers.
*/

static boolean DAC960_V2_ReportDeviceConfiguration(DAC960_Controller_T
						   *Controller)
{
  int PhysicalDeviceIndex, LogicalDriveNumber;
  DAC960_Info("  Physical Devices:\n", Controller);
  for (PhysicalDeviceIndex = 0;
       PhysicalDeviceIndex < DAC960_V2_MaxPhysicalDevices;
       PhysicalDeviceIndex++)
    {
      DAC960_V2_PhysicalDeviceInfo_T *PhysicalDeviceInfo =
	Controller->V2.PhysicalDeviceInformation[PhysicalDeviceIndex];
      DAC960_SCSI_Inquiry_T *InquiryStandardData =
	(DAC960_SCSI_Inquiry_T *) &PhysicalDeviceInfo->SCSI_InquiryData;
      DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
	Controller->V2.InquiryUnitSerialNumber[PhysicalDeviceIndex];
      char Vendor[1+sizeof(InquiryStandardData->VendorIdentification)];
      char Model[1+sizeof(InquiryStandardData->ProductIdentification)];
      char Revision[1+sizeof(InquiryStandardData->ProductRevisionLevel)];
      char SerialNumber[1+sizeof(InquiryUnitSerialNumber->ProductSerialNumber)];
      if (PhysicalDeviceInfo == NULL) break;
      DAC960_SanitizeInquiryData(InquiryStandardData, InquiryUnitSerialNumber,
				 Vendor, Model, Revision, SerialNumber);
      DAC960_Info("    %d:%d%s Vendor: %s  Model: %s  Revision: %s\n",
		  Controller,
		  PhysicalDeviceInfo->Channel,
		  PhysicalDeviceInfo->TargetID,
		  (PhysicalDeviceInfo->TargetID < 10 ? " " : ""),
		  Vendor, Model, Revision);
      if (PhysicalDeviceInfo->NegotiatedSynchronousMegaTransfers == 0)
	DAC960_Info("         %sAsynchronous\n", Controller,
		    (PhysicalDeviceInfo->NegotiatedDataWidthBits == 16
		     ? "Wide " :""));
      else
	DAC960_Info("         %sSynchronous at %d MB/sec\n", Controller,
		    (PhysicalDeviceInfo->NegotiatedDataWidthBits == 16
		     ? "Wide " :""),
		    (PhysicalDeviceInfo->NegotiatedSynchronousMegaTransfers