dac960.c

讲述linux的初始化过程

	return DAC960_Failure(Controller, "GET DEVICE STATE");
  /*
    Initialize the Controller Model Name and Full Model Name fields.
  */
  switch (Enquiry2.HardwareID.SubModel)
    {
    case DAC960_V1_P_PD_PU:
      if (Enquiry2.SCSICapability.BusSpeed == DAC960_V1_Ultra)
	strcpy(Controller->ModelName, "DAC960PU");
      else strcpy(Controller->ModelName, "DAC960PD");
      break;
    case DAC960_V1_PL:
      strcpy(Controller->ModelName, "DAC960PL");
      break;
    case DAC960_V1_PG:
      strcpy(Controller->ModelName, "DAC960PG");
      break;
    case DAC960_V1_PJ:
      strcpy(Controller->ModelName, "DAC960PJ");
      break;
    case DAC960_V1_PR:
      strcpy(Controller->ModelName, "DAC960PR");
      break;
    case DAC960_V1_PT:
      strcpy(Controller->ModelName, "DAC960PT");
      break;
    case DAC960_V1_PTL0:
      strcpy(Controller->ModelName, "DAC960PTL0");
      break;
    case DAC960_V1_PRL:
      strcpy(Controller->ModelName, "DAC960PRL");
      break;
    case DAC960_V1_PTL1:
      strcpy(Controller->ModelName, "DAC960PTL1");
      break;
    case DAC960_V1_1164P:
      strcpy(Controller->ModelName, "DAC1164P");
      break;
    default:
      return DAC960_Failure(Controller, "MODEL VERIFICATION");
    }
  strcpy(Controller->FullModelName, "Mylex ");
  strcat(Controller->FullModelName, Controller->ModelName);
  /*
    Initialize the Controller Firmware Version field and verify that it
    is a supported firmware version.  The supported firmware versions are:

    DAC1164P		    5.06 and above
    DAC960PTL/PRL/PJ/PG	    4.06 and above
    DAC960PU/PD/PL	    3.51 and above
  */
  sprintf(Controller->FirmwareVersion, "%d.%02d-%c-%02d",
	  Enquiry2.FirmwareID.MajorVersion, Enquiry2.FirmwareID.MinorVersion,
	  Enquiry2.FirmwareID.FirmwareType, Enquiry2.FirmwareID.TurnID);
  if (!((Controller->FirmwareVersion[0] == '5' &&
	 strcmp(Controller->FirmwareVersion, "5.06") >= 0) ||
	(Controller->FirmwareVersion[0] == '4' &&
	 strcmp(Controller->FirmwareVersion, "4.06") >= 0) ||
	(Controller->FirmwareVersion[0] == '3' &&
	 strcmp(Controller->FirmwareVersion, "3.51") >= 0)))
    {
      DAC960_Failure(Controller, "FIRMWARE VERSION VERIFICATION");
      DAC960_Error("Firmware Version = '%s'\n", Controller,
		   Controller->FirmwareVersion);
      return false;
    }
  /*
    Initialize the Controller Channels, Targets, Memory Size, and SAF-TE
    Enclosure Management Enabled fields.
  */
  Controller->Channels = Enquiry2.ActualChannels;
  Controller->Targets = Enquiry2.MaxTargets;
  Controller->MemorySize = Enquiry2.MemorySize >> 20;
  Controller->V1.SAFTE_EnclosureManagementEnabled =
    (Enquiry2.FaultManagementType == DAC960_V1_SAFTE);
  /*
    Initialize the Controller Queue Depth, Driver Queue Depth, Logical Drive
    Count, Maximum Blocks per Command, Controller Scatter/Gather Limit, and
    Driver Scatter/Gather Limit.  The Driver Queue Depth must be at most one
    less than the Controller Queue Depth to allow for an automatic drive
    rebuild operation.
  */
  Controller->ControllerQueueDepth = Controller->V1.Enquiry.MaxCommands;
  Controller->DriverQueueDepth = Controller->ControllerQueueDepth - 1;
  if (Controller->DriverQueueDepth > DAC960_MaxDriverQueueDepth)
    Controller->DriverQueueDepth = DAC960_MaxDriverQueueDepth;
  Controller->LogicalDriveCount =
    Controller->V1.Enquiry.NumberOfLogicalDrives;
  Controller->MaxBlocksPerCommand = Enquiry2.MaxBlocksPerCommand;
  Controller->ControllerScatterGatherLimit = Enquiry2.MaxScatterGatherEntries;
  Controller->DriverScatterGatherLimit =
    Controller->ControllerScatterGatherLimit;
  if (Controller->DriverScatterGatherLimit > DAC960_V1_ScatterGatherLimit)
    Controller->DriverScatterGatherLimit = DAC960_V1_ScatterGatherLimit;
  /*
    Initialize the Stripe Size, Segment Size, and Geometry Translation.
  */
  Controller->V1.StripeSize = Config2.BlocksPerStripe * Config2.BlockFactor
			      >> (10 - DAC960_BlockSizeBits);
  Controller->V1.SegmentSize = Config2.BlocksPerCacheLine * Config2.BlockFactor
			       >> (10 - DAC960_BlockSizeBits);
  switch (Config2.DriveGeometry)
    {
    case DAC960_V1_Geometry_128_32:
      Controller->V1.GeometryTranslationHeads = 128;
      Controller->V1.GeometryTranslationSectors = 32;
      break;
    case DAC960_V1_Geometry_255_63:
      Controller->V1.GeometryTranslationHeads = 255;
      Controller->V1.GeometryTranslationSectors = 63;
      break;
    default:
      return DAC960_Failure(Controller, "CONFIG2 DRIVE GEOMETRY");
    }
  /*
    Initialize the Logical Drive Initially Accessible flag.
  */
  for (LogicalDriveNumber = 0;
       LogicalDriveNumber < Controller->LogicalDriveCount;
       LogicalDriveNumber++)
    if (Controller->V1.LogicalDriveInformation
		       [LogicalDriveNumber].LogicalDriveState !=
	DAC960_V1_LogicalDrive_Offline)
      Controller->LogicalDriveInitiallyAccessible[LogicalDriveNumber] = true;
  Controller->V1.LastRebuildStatus = DAC960_V1_NoRebuildOrCheckInProgress;
  return true;
}


/*
  DAC960_V2_ReadControllerConfiguration reads the Configuration Information
  from DAC960 V2 Firmware Controllers and initializes the Controller structure.
*/

static boolean DAC960_V2_ReadControllerConfiguration(DAC960_Controller_T
						     *Controller)
{
  DAC960_V2_ControllerInfo_T *ControllerInfo =
    &Controller->V2.ControllerInformation;
  unsigned short LogicalDeviceNumber = 0;
  int ModelNameLength;
  if (!DAC960_V2_ControllerInfo(Controller, DAC960_V2_GetControllerInfo,
				ControllerInfo,
				sizeof(DAC960_V2_ControllerInfo_T)))
    return DAC960_Failure(Controller, "GET CONTROLLER INFO");
  if (!DAC960_V2_GeneralInfo(Controller, DAC960_V2_GetHealthStatus,
			     Controller->V2.HealthStatusBuffer,
			     sizeof(DAC960_V2_HealthStatusBuffer_T)))
    return DAC960_Failure(Controller, "GET HEALTH STATUS");
  /*
    Initialize the Controller Model Name and Full Model Name fields.
  */
  ModelNameLength = sizeof(ControllerInfo->ControllerName);
  if (ModelNameLength > sizeof(Controller->ModelName)-1)
    ModelNameLength = sizeof(Controller->ModelName)-1;
  memcpy(Controller->ModelName, ControllerInfo->ControllerName,
	 ModelNameLength);
  ModelNameLength--;
  while (Controller->ModelName[ModelNameLength] == ' ' ||
	 Controller->ModelName[ModelNameLength] == '\0')
    ModelNameLength--;
  Controller->ModelName[++ModelNameLength] = '\0';
  strcpy(Controller->FullModelName, "Mylex ");
  strcat(Controller->FullModelName, Controller->ModelName);
  /*
    Initialize the Controller Firmware Version field.
  */
  sprintf(Controller->FirmwareVersion, "%d.%02d-%02d",
	  ControllerInfo->FirmwareMajorVersion,
	  ControllerInfo->FirmwareMinorVersion,
	  ControllerInfo->FirmwareTurnNumber);
  if (ControllerInfo->FirmwareMajorVersion == 6 &&
      ControllerInfo->FirmwareMinorVersion == 0 &&
      ControllerInfo->FirmwareTurnNumber < 1)
    {
      DAC960_Info("FIRMWARE VERSION %s DOES NOT PROVIDE THE CONTROLLER\n",
		  Controller, Controller->FirmwareVersion);
      DAC960_Info("STATUS MONITORING FUNCTIONALITY NEEDED BY THIS DRIVER.\n",
		  Controller);
      DAC960_Info("PLEASE UPGRADE TO VERSION 6.00-01 OR ABOVE.\n",
		  Controller);
    }
  /*
    Initialize the Controller Channels, Targets, and Memory Size.
  */
  Controller->Channels = ControllerInfo->NumberOfPhysicalChannelsPresent;
  Controller->Targets =
    ControllerInfo->MaximumTargetsPerChannel
		    [ControllerInfo->NumberOfPhysicalChannelsPresent-1];
  Controller->MemorySize = ControllerInfo->MemorySizeMB;
  /*
    Initialize the Controller Queue Depth, Driver Queue Depth, Logical Drive
    Count, Maximum Blocks per Command, Controller Scatter/Gather Limit, and
    Driver Scatter/Gather Limit.  The Driver Queue Depth must be at most one
    less than the Controller Queue Depth to allow for an automatic drive
    rebuild operation.
  */
  Controller->ControllerQueueDepth = ControllerInfo->MaximumParallelCommands;
  Controller->DriverQueueDepth = Controller->ControllerQueueDepth - 1;
  if (Controller->DriverQueueDepth > DAC960_MaxDriverQueueDepth)
    Controller->DriverQueueDepth = DAC960_MaxDriverQueueDepth;
  Controller->LogicalDriveCount = ControllerInfo->LogicalDevicesPresent;
  Controller->MaxBlocksPerCommand =
    ControllerInfo->MaximumDataTransferSizeInBlocks;
  Controller->ControllerScatterGatherLimit =
    ControllerInfo->MaximumScatterGatherEntries;
  Controller->DriverScatterGatherLimit =
    Controller->ControllerScatterGatherLimit;
  if (Controller->DriverScatterGatherLimit > DAC960_V2_ScatterGatherLimit)
    Controller->DriverScatterGatherLimit = DAC960_V2_ScatterGatherLimit;
  /*
    Initialize the Logical Device Information.
  */
  while (true)
    {
      DAC960_V2_LogicalDeviceInfo_T *NewLogicalDeviceInfo =
	&Controller->V2.NewLogicalDeviceInformation;
      DAC960_V2_LogicalDeviceInfo_T *LogicalDeviceInfo;
      DAC960_V2_PhysicalDevice_T PhysicalDevice;
      if (!DAC960_V2_LogicalDeviceInfo(Controller,
				       DAC960_V2_GetLogicalDeviceInfoValid,
				       LogicalDeviceNumber,
				       NewLogicalDeviceInfo,
				       sizeof(DAC960_V2_LogicalDeviceInfo_T)))
	break;
      LogicalDeviceNumber = NewLogicalDeviceInfo->LogicalDeviceNumber;
      if (LogicalDeviceNumber > DAC960_MaxLogicalDrives)
	panic("DAC960: Logical Drive Number %d not supported\n",
		       LogicalDeviceNumber);
      if (NewLogicalDeviceInfo->DeviceBlockSizeInBytes != DAC960_BlockSize)
	panic("DAC960: Logical Drive Block Size %d not supported\n",
	      NewLogicalDeviceInfo->DeviceBlockSizeInBytes);
      PhysicalDevice.Controller = 0;
      PhysicalDevice.Channel = NewLogicalDeviceInfo->Channel;
      PhysicalDevice.TargetID = NewLogicalDeviceInfo->TargetID;
      PhysicalDevice.LogicalUnit = NewLogicalDeviceInfo->LogicalUnit;
      Controller->V2.LogicalDriveToVirtualDevice[LogicalDeviceNumber] =
	PhysicalDevice;
      if (NewLogicalDeviceInfo->LogicalDeviceState !=
	  DAC960_V2_LogicalDevice_Offline)
	Controller->LogicalDriveInitiallyAccessible[LogicalDeviceNumber] = true;
      LogicalDeviceInfo = (DAC960_V2_LogicalDeviceInfo_T *)
	kmalloc(sizeof(DAC960_V2_LogicalDeviceInfo_T), GFP_ATOMIC);
      if (LogicalDeviceInfo == NULL)
	return DAC960_Failure(Controller, "LOGICAL DEVICE ALLOCATION");
      Controller->V2.LogicalDeviceInformation[LogicalDeviceNumber] =
	LogicalDeviceInfo;
      memcpy(LogicalDeviceInfo, NewLogicalDeviceInfo,
	     sizeof(DAC960_V2_LogicalDeviceInfo_T));
      LogicalDeviceNumber++;
    }
  return true;
}


/*
  DAC960_ReportControllerConfiguration reports the Configuration Information
  for Controller.
*/

static boolean DAC960_ReportControllerConfiguration(DAC960_Controller_T
						    *Controller)
{
  DAC960_Info("Configuring Mylex %s PCI RAID Controller\n",
	      Controller, Controller->ModelName);
  DAC960_Info("  Firmware Version: %s, Channels: %d, Memory Size: %dMB\n",
	      Controller, Controller->FirmwareVersion,
	      Controller->Channels, Controller->MemorySize);
  DAC960_Info("  PCI Bus: %d, Device: %d, Function: %d, I/O Address: ",
	      Controller, Controller->Bus,
	      Controller->Device, Controller->Function);
  if (Controller->IO_Address == 0)
    DAC960_Info("Unassigned\n", Controller);
  else DAC960_Info("0x%X\n", Controller, Controller->IO_Address);
  DAC960_Info("  PCI Address: 0x%X mapped at 0x%lX, IRQ Channel: %d\n",
	      Controller, Controller->PCI_Address,
	      (unsigned long) Controller->BaseAddress,
	      Controller->IRQ_Channel);
  DAC960_Info("  Controller Queue Depth: %d, "
	      "Maximum Blocks per Command: %d\n",
	      Controller, Controller->ControllerQueueDepth,
	      Controller->MaxBlocksPerCommand);
  DAC960_Info("  Driver Queue Depth: %d, "
	      "Scatter/Gather Limit: %d of %d Segments\n",
	      Controller, Controller->DriverQueueDepth,
	      Controller->DriverScatterGatherLimit,
	      Controller->ControllerScatterGatherLimit);
  if (Controller->FirmwareType == DAC960_V1_Controller)
    {
      DAC960_Info("  Stripe Size: %dKB, Segment Size: %dKB, "
		  "BIOS Geometry: %d/%d\n", Controller,
		  Controller->V1.StripeSize,
		  Controller->V1.SegmentSize,
		  Controller->V1.GeometryTranslationHeads,
		  Controller->V1.GeometryTranslationSectors);
      if (Controller->V1.SAFTE_EnclosureManagementEnabled)
	DAC960_Info("  SAF-TE Enclosure Management Enabled\n", Controller);
    }
  return true;
}


/*
  DAC960_V1_ReadDeviceConfiguration reads the Device Configuration Information
  for DAC960 V1 Firmware Controllers by requesting the SCSI Inquiry and SCSI
  Inquiry Unit Serial Number information for each device connected to
  Controller.
*/

static boolean DAC960_V1_ReadDeviceConfiguration(DAC960_Controller_T
						 *Controller)
{
  DAC960_V1_DCDB_T DCDBs[DAC960_V1_MaxChannels], *DCDB;
  Semaphore_T Semaphores[DAC960_V1_MaxChannels], *Semaphore;
  unsigned long ProcessorFlags;
  int Channel, TargetID;
  for (TargetID = 0; TargetID < Controller->Targets; TargetID++)
    {
      for (Channel = 0; Channel < Controller->Channels; Channel++)
	{
	  DAC960_Command_T *Command = Controller->Commands[Channel];
	  DAC960_SCSI_Inquiry_T *InquiryStandardData =
	    &Controller->V1.InquiryStandardData[Channel][TargetID];
	  InquiryStandardData->PeripheralDeviceType = 0x1F;
	  Semaphore = &Semaphores[Channel];
	  init_MUTEX_LOCKED(Semaphore);
	  DCDB = &DCDBs[Channel];
	  DAC960_V1_ClearCommand(Command);
	  Command->CommandType = DAC960_ImmediateCommand;
	  Command->Semaphore = Semaphore;
	  Command->V1.CommandMailbox.Type3.CommandOpcode = DAC960_V1_DCDB;
	  Command->V1.CommandMailbox.Type3.BusAddress = Virtual_to_Bus(DCDB);
	  DCDB->Channel = Channel;
	  DCDB->TargetID = TargetID;
	  DCDB->Direction = DAC960_V1_DCDB_DataTransferDeviceToSystem;