The !usbkd.usbdevh command displays information about a USB device handle.

!usbkd.usbdevh StructAddr



Address of a usbport!_USBD_DEVICE_HANDLE structure. To get the device handle list for a USB host controller, use the !usbkd.usbhcdext command.




Here is one way to find the address of a usbport!_USBD_DEVICE_HANDLE structure. First enter !usbkd.usb2tree.

0: kd> !usbkd.usb2tree
2)!ehci_info ffffe00001ca11a0 !devobj ffffe00001ca1050 PCI: VendorId 8086 DeviceId 293c RevisionId 0002 

In the preceding output, the address of the device extension of the FDO is displayed as the argument of the DML command !ehci_info ffffe00001ca11a0.

Either click the DML command or pass the address of the device extension to !usbhcdext to get the device handle list.

0: kd> !usbkd.usbhcdext ffffe00001ca11a0

HC Flavor 1000 	FDO ffffe00001ca1050
Root Hub: FDO ffffe00002320050 !hub2_info ffffe000023201a0
Operational Registers ffffd000228bf020
Device Data ffffe00001ca2da0
dt USBPORT!_FDO_EXTENSION ffffe00001ca15a0
DM Timer Flags ffffe00001ca16d4
FDO Flags ffffe00001ca16d0
HCD Log ffffe00001ca11a0

DeviceHandleList: !usblist ffffe00001ca23b8, DL 
DeviceHandleDeletedList: !usblist ffffe00001ca23c8, DL [Empty]

Now use the !usbkd.usblist command to get the addresses of usbport!_USBD_DEVICE_HANDLE structures.

0: kd> !usblist ffffe00001ca23b8, DL
list: ffffe00001ca23b8 DL
!usbdevh ffffe000020f9590
SSP [IdleReady] (0)

In the preceding output, ffffe000020f9590 is the address of a _USBD_DEVICE_HANDLE structure. Pass this address to !usbdevh.

0: kd> !usbkd.usbdevh ffffe000020f9590

dt USBPORT!_USBD_DEVICE_HANDLE ffffe000020f9590
SSP [IdleReady] (0)
PCI\VEN_8086&DEV_293C  Intel Corporation
Root Hub
DriverName :  

DEVICE HANDLE HISTORY (latest at boottom)
     EVENT                        STATE                        NEXT
[01] Ev_CreateRoothub_Success     Devh_Created                 Devh_Valid                   

Referene List: Head(ffffe000020f9668)
[00] dt USBPORT!_DEVH_REF_OBJ ffffe000021944a0  Object: ffffe000020f9590 Tag: dvh+ PendingFlag(0)
[01] dt USBPORT!_DEVH_REF_OBJ ffffe000020bbcb0  Object: ffffe000020ba7e0 Tag: bsCT PendingFlag(0)
[02] dt USBPORT!_DEVH_REF_OBJ ffffe000032b91a0  Object: ffffe0000269e670 Tag: UrbT PendingFlag(1)

TtList: Head(ffffe000020f9658)

PipeHandleList: Head(ffffe000020f9640)
[00] dt USBPORT!_USBD_PIPE_HANDLE_I ffffe000020f95e0 !usbep ffffe000020f6970
        Device Address: 0x00, Endpoint Address 0x00 Endpoint Type: Control 
[01] dt USBPORT!_USBD_PIPE_HANDLE_I ffffe000023bd278 !usbep ffffe0000212d970
        Device Address: 0x00, Endpoint Address 0x81 Endpoint Type: Interrupt In

Config Information: dt USBPORT!_USBD_CONFIG_HANDLE ffffe000023cd0b0

Interface List:
[00] dt USBPORT!_USBD_INTERFACE_HANDLE_I ffffe000023bd250

See also

USB 2.0 Debugger Extensions
Universal Serial Bus (USB) Drivers



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