A few questions:
1. Where do the values for TRB completion codes come from?
COMP_BW_ERR and COMP_2ND_BW_ERR seem to be defined
and then only used in a switch statement.
2. xhci_queue_configure_endpoint() seems to be the function for
sending down a command that somehow loads the "BW_ERR"
code into command->status asynchronously. What thread
handles the command dispatch after queue_command() has
queued it? Finding it seems a little obscure.
I want to look into two things:
How is bandwidth computed? Is it possible that a USB3 hub's capacity
is interpreted as its bandwidth requirement and that devices plugged into
it then _augment_ required bandwidth instead of reducing available hub
capacity?
Secondly, if that is too hard to figure out, then, yes, I want to disable the
bandwidth limitations for my computer. Not a general solution, but at this
point, whatever works, works.
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