!usbkd._ehcitd
The !usbkd._ehcitd command displays information from a usbehci!_TRANSFER_CONTEXT structure. Use this command to display information about asynchronous endpoints (that is, control and bulk endpoints).
!usbkd._ehcitd StructAddr
Parameters
StructAddr
Address of a usbehci!_TRANSFER_CONTEXT structure.
DLL
Usbkd.dll
Examples
This example shows one way to get the address of a usbehci!_TRANSFER_CONTEXT structure. Use !_ehciep to display information about an endpoint.
0: kd> !_ehciep ffffe000001ab618
*USBEHCI
dt usbehci!_ENDPOINT_DATA ffffe000001ab618
Flags: 0x00000000
dt usbehci!_HCD_QUEUEHEAD_DESCRIPTOR ffffd00021e65080
*HwQH ffffd00021e65080
HwQH
HwQH.HLink dea2e002
HwQH.EpChars 02002201
DeviceAddress: 0x1
IBit: 0x0
EndpointNumber: 0x2
...
slot[0] dt usbehci!_ENDPOINT_SLOT ffffe000001ab798 - slot_NotBusy
----
ffffd00021e65100
dt usbehci!_HCD_TRANSFER_DESCRIPTOR ffffd00021e65100
....
In the preceding output, ffffd00021e65100 is the address of a usbehci!_TRANSFER_CONTEXT structure. Pass this address to !_ehcitd.
0: kd> !_ehcitd ffffd00021e65100
*USBEHCI TD 21e65100
Sig 20td
qTD
Next_qTD: d83cc200
AltNext_qTD: d83cc180
Token: 0x00000c00
PingState: 0x0
SplitXstate: 0x0
MissedMicroFrame: 0x0
XactErr: 0x0
BabbleDetected: 0x0
DataBufferError: 0x0
Halted: 0x0
Active: 0x0
Pid: 0x0 - HcTOK_Out
ErrorCounter: 0x3
C_Page: 0x0
InterruptOnComplete: 0x0
BytesToTransfer: 0x0
DataToggle: 0x0
BufferPage[0]: 0x 0bad0-000 0bad0000 BufferPage64[0]: 00000000
BufferPage[1]: 0x 0bad0-000 0bad0000 BufferPage64[1]: 00000000
BufferPage[2]: 0x 0bad0-000 0bad0000 BufferPage64[2]: 00000000
BufferPage[3]: 0x 0bad0-000 0bad0000 BufferPage64[3]: 00000000
BufferPage[4]: 0x 0bad0-000 0bad0000 BufferPage64[4]: 00000000
Packet:00 52 e6 21 00 d0 ff ff
PhysicalAddress: d83cc100
EndpointData: 001ab618
TransferLength : 0000001f
TransferContext: 00000000
Flags: 00000041
TD_FLAG_BUSY
NextHcdTD: 21e65200
AltNextHcdTD: 21e65180
SlotNextHcdTD: 21e65200