!usbkd.usblist
The !usbkd.usblist command displays a linked list of structures of a specified type.
!usbkd.usblist ListAddr, ListType
Parameters
ListAddr
Address of a linked list of structures. To find addresses of linked lists maintained by the USB port driver, use !usbhcdext. To find addresses of linked list maintained by the USB hub driver, use !usbhubext.
ListType
One of the following list types.
| List type | Structure |
|---|---|
| BC | usbport!_BUS_CONTEXT |
| EP | usbport!_HCD_ENDPOINT |
| TT | usbport!_TRANSACTION_TRANSLATOR |
| DL | usbport!_USBD_DEVICE_HANDLE |
| PL | usbhub!_DEVICE_EXTENSION_PDO |
| EL | usbhub!_HUB_EXCEPTION_RECORD |
| RL | usbhub!_HUB_REFERENCE_LIST_ENTRY |
| TL | usbhub!_HUB_TIMER_OBJECT |
| WI | usbhub!_HUB_WORKITEM |
| IO | usbhub!_IO_LIST_ENTRY |
| LA | usbhub!_LATCH_LIST_ENTRY |
| CL | usbhub!_PORT_CHANGE_CONTEXT |
| BL | usbhub!_SSP_BUSY_HANDLE |
DLL
Usbkd.dll
Examples
Here is one way to find the address of a linked list. First enter !usbkd.usb2tree.
0: kd> !usbkd.usb2tree
...
2)!ehci_info ffffe00001ca11a0 !devobj ffffe00001ca1050 ...
...
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.
0: kd> !usbkd.usbhcdext ffffe00001ca11a0
HC Flavor 1000 FDO ffffe00001ca1050
Root Hub: FDO ffffe00002320050 !hub2_info ffffe000023201a0
...
DeviceHandleList: !usblist ffffe00001ca23b8, DL
...
In the preceding output, ffffe00001ca23b8 is the address of a linked list of usbport!_USBD_DEVICE_HANDLE structures.
Now pass the address of the linked list to !usblist.
0: kd> !usblist ffffe00001ca23b8, DL
list: ffffe00001ca23b8 DL
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!usbdevh ffffe000020f9590
SSP [IdleReady] (0)
PCI\VEN_Xxxx Xxxx Corporation
Root Hub
DriverName :
----------
!usbdevh ffffe00001bce250
SSP [IdleReady] (0)
USB\Xxxx Xxxx Corporation
Speed: HIGH, Address: 1, PortPathDepth: 1, PortPath: [3 0 0 0 0 0]
DriverName :\Driver\USBSTOR !devstack ffffe000053ef2a0
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