#13343: QEMU XHCI Devices not bootable
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Reporter: kallisti5 | Owner: nobody
Type: bug | Status: new
Priority: high | Milestone: R1/beta1
Component: Drivers/USB/XHCI | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking: 12895
Has a Patch: 0 | Platform: All
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Comment (by kallisti5):
Looking through the XHCI tickets.
We commonly see the following errors per the XHCI spec:
* 5 TRB Error
* Asserted when a TRB parameter error condition (e.g., out of range or
invalid parameter) is detected in a TRB. Refer to section 4.10.2.2 for
examples
> 4.10.2.2 TRB Error
> A TRB Error indicates the TRB field values are out of range or that
the xHC has
> determined that a TRB is incorrectly formed.
> This error condition may be reported in a Transfer Event or a Command
Completion Event
> due to an error detected on a Transfer or Command TRB, respectively.
This error will
> not be reported in any other Event TRB types.
> Note: A Transfer Ring TRB Error should transition an endpoint to the
Error state (refer
> to section 4.8.3), however an xHC implementation may assert HCE18 due
to the detection
> of TRB Error related error conditions. It is the responsibility of
software to always
> present correctly formed TRBs to the xHC.
* 17 Parameter Error
* Asserted by a command if a Context parameter is invalid.
All of the errors we see seem to align to an incorrectly set parameter
field.
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Ticket URL: <https://dev.haiku-os.org/ticket/13343#comment:13>
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