Hi, "Du, Changbin" <changbin.du@xxxxxxxxx> writes: > Hi, Balbi. > > Feel free to change it, I may not have enough time on this currently. > "per-endpoint directory" is great idea, then we do not need find out > wanted info from one big file, but just go to specific dir. that was the idea, glad you liked it ;-) > Btw, I'd mention that not all out ep has a rx fifo. So in my original patch, yeah, rx fifos are dynamically allocated by the HW itself, AFAICT. > not all FIFO/Queue info are valid. We need pick out the real info we need. > And I didn't find any method to read the FIFO map. > > At last, comparing with the FIFO/Queue info, I think software transfer > Requests list, TRBs info, EVENTs history are much more useful for debugging > the driver. If you can also add these info to each EP folder, that is awesome! > :) I'll think about adding these but for the lifetime of requests and trbs and events, etc, we have tracepoints for that. I usually do the following when debugging: # mount -t debugfs none /sys/kernel/debug # cd /sys/kernel/debug/tracing # echo 2048 > buffer_size_kb # echo 1 > events/dwc3/enable (do something to break it) # cp trace /mnt/sdcard # or something like that then read the file. You can make it as large or as small as you like (given some constraints, of course ;-) but I've had no issues allocating 128MiB in the past. -- balbi
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