| Debugging Tools for Windows |
When you debug SCSI miniport drivers, you may find the following debugger extensions useful. General debugger extensions are listed first, followed by those specific to SCSI miniport debugging.
The !devobj extension displays detailed information about a DEVICE_OBJECT. If the Current Irp field is nonnull, this could be caused by the SCSI driver waiting for map registers.
Here is an example:
Device object (8633da70) is for:
adpu160m1 \Driver\adpu160m DriverObject 8633eeb8
Current Irp 860ef008 RefCount 0 Type 00000004 Flags 00000050
Dacl e129871c DevExt 8633db28 DevObjExt 8633dfd0
ExtensionFlags (0000000000)
AttachedTo (Lower) 863b2978 \Driver\PCI
Device queue is not busy.
The !errlog extension displays the contents of any pending entries in the I/O system's error log.
The !object extension displays information about a system object. This extension displays all SCSI devices.
For example:
Object: e12a2520 Type: (863d12c8) Directory
ObjectHeader: e12a2508
HandleCount: 0 PointerCount: 9
Directory Object: e1001100 Name: Scsi
Hash Address Type Name
---- ------- ---- ----
04 86352040 Device adpu160m1Port3Path0Target6Lun0
11 86353040 Device adpu160m1Port3Path0Target1Lun0
13 86334a70 Device lp6nds351
22 862e6040 Device adpu160m1Port3Path0Target0Lun0
24 8633da70 Device adpu160m1
25 86376040 Device adpu160m2
34 862e5040 Device adpu160m1Port3Path0Target2Lun0
The !pcr extension displays detailed information about the Processor Control Region (PCR) on a processor. The information includes the items in the DPC queue, which can be useful. when you are debugging a stalled driver or a time-out.
The !minipkd.help extension displays a list of all of the Minipkd.dll extension commands.
If an error message similar to the following appears, it indicates that the symbol path is incorrect and does not point to the correct version of the Scsiport.sys symbols.
The .sympath (Set Symbol Path) command can be used to display the current path and to change the path. The .reload (Reload Module) command will reload symbols from the current path.
The !minipkd.adapter extension displays detailed information about a specified adapter. The Adapter can be found by looking at the DevExt field in the !minipkd.adapters display.
The !minipkd.adapters extension displays all the adapters that work with the SCSI Port driver that have been identified by Windows, and the individual devices associated with each adapter.
Here is an example:
Adapter \Driver\lp6nds35 DO 86334a70 DevExt 86334b28
Adapter \Driver\adpu160m DO 8633da70 DevExt 8633db28
LUN 862e60f8 @(0,0,0) c ev pnp(00/ff) pow(0,0) DevObj 862e6040
LUN 863530f8 @(0,1,0) c ev p d pnp(00/ff) pow(0,0) DevObj 86353040
LUN 862e50f8 @(0,2,0) c ev pnp(00/ff) pow(0,0) DevObj 862e5040
LUN 863520f8 @(0,6,0) ev pnp(00/ff) pow(0,0) DevObj 86352040
Adapter \Driver\adpu160m DO 86376040 DevExt 863760f8
An error message similar to the following indicates that either the symbol path is incorrect and does not point to the correct version of the Scsiport.sys symbols, or that Windows has not identified any adapters that work with the SCSI Port driver:
If the !minipkd.help extension command returns help information successfully, the SCSI Port symbols are correct.
The !minipkd.exports extension displays the addresses of the miniport exports for the specified adapter.
The !minipkd.lun extension displays detailed information about a specified Logical Unit Extension (LUN). The LUN can be specified either by its address (which can be found by looking at the LUN field in the !minipkd.adapters display) or by its physical device object (which can be found in the DevObj field of the !minipkd.adapters display).
The !minipkd.portconfig extension displays detailed information about a specified PORT_CONFIGURATION_DATA. The PortConfig can be found in the Port Config Info field of the !minipkd.adapter display.
The !minipkd.req extension displays information about all of the currently active requests on the specified adapter or LUN device.
The !minipkd.srb extension displays detailed information about a specified SCSI request block (SRB). The SRB is specified by address. The addresses of all currently active requests can be found in the SRB fields of the output from the !minipkd.req command.
The !scsikd.classext extension displays detailed information about a specified class Plug and Play (PnP) device or a list of all such devices. The Device is the device object or device extension of the class PnP device. If Device is omitted, a list of all class PnP extensions is displayed.
Here is an example:
' !scsikd.classext 8633e3f0 ' ( ) "IBM " / "DDYS-T09170M " / "S93E" / " XBY45906"
' !scsikd.classext 86347b48 ' (paging device) "IBM " / "DDYS-T09170M " / "S80D" / " VDA60491"
' !scsikd.classext 86347360 ' ( ) "UNISYS " / "003451ST34573WC " / "5786" / "HN0220750000181300L6"
' !scsikd.classext 861d1898 ' ( ) "" / "MATSHITA CD-ROM CR-177" / "7T03" / ""
usage: !classext <class fdo> <level [0-2]>
The !scsikd.scsiext extension displays detailed information about a specified SCSI port extension. The Device can be the device object or device extension of either the adapter or the LUN.
Here are some examples:
Common Extension:
< ..omitted.. >
Logical Unit Extension:
Address (3, 0, 1, 0) Claimed Enumerated Visible
LuFlags (0x00000000):
Retry 0x00 Key 0x008889ff
Lock 0x00000000 Pause 0x00000000 CurrentLock: 0x00000000
HwLuExt 0x862e6f00 Adapter 0x8633db28 Timeout 0x0000000a
NextLun 0x00000000 ReadyLun 0x00000000
Pending 0x00000000 Busy 0x00000000 Untagged 0x00000000
< ..omitted.. >
Request list @0x86353200:
Tick count is 2526
SrbData 8615d700 Srb 8611f4fc Irp 8611f2b8 Key 60197 <1s
SrbData 85e72868 Srb 86100c3c Irp 861009f8 Key e29dc7 <1s
0: kd> !scsikd.scsiext 8633da70
Common Extension:
< ..omitted.. >
Adapter Extension:
Port 3 IsPnp VirtualSlot HasInterrupt
LowerPdo 0x84f9fb68 HwDevExt 0x84634004 Active Requests 0x00000000
MaxBus 0x03 MaxTarget 0x40 MaxLun 0x08
Port Flags (0x00001000): PD_DISCONNECT_RUNNING
NonCacheExt 0x850d4000 IoBase 0xd80f0000 Int 0x23 < ..omitted.. >
The !scsikd.srbdata extension displays detailed information about a specified SRB_DATA tracking block.