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.\" Copyright (c) 2019 Matthew R. Green
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.Dd June 15, 2021
.Dt USBNET 4
.Os
.Sh NAME
.Nm usbnet
.Nd generic USB network driver backend diagnostics
.Sh DESCRIPTION
The
.Nm
subsystem provides support for USB network devices.
This manual describes diagnostics that may be seen.
.Sh DIAGNOSTICS
.Bl -tag -width 10n
.It "devN: sysctl_createv failed"
Unable to create debug node for
.Nx .
.It "devN: usb errors on rx"
Error status from device upon Rx interrupt, device may be non-functional.
.It "devN: usb error on tx"
Error status from device upon Tx interrupt., device may be non-functional.
.It "devN: usb error on intr"
Error status from device upon interrupt, device may be non-functional.
.It "devN: rxeof: too large transfer"
Network input rejected.
.It "devN: close pipe N"
Closing of Rx, Tx or Interrupt pipe failed, device may be non-functional.
.It "devN: open rx/tx pipes failed"
Opening of Rx or Tx pipes failed, device non-functional.
.It "devN: [rt]x list init failed"
Creation of Rx or Tx list failed, device non-functional.
.It "devN: watchdog timeout"
Time out in transmission.
.It "devN: pipe abort failed"
Aborting USB pipes after watchdog timeout failed.
.It "devN: couldn't establish power handler"
Call to
.Xr pmf_device_register 9
failed, disabling system suspend.
.El
.Pp
The
.Nm
manual lists generic diagnostics generated by USB network devices.
.Sh SEE ALSO
.Xr arp 4 ,
.Xr aue 4 ,
.Xr axe 4 ,
.Xr axen 4 ,
.Xr cdce 4 ,
.Xr cue 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr kue 4 ,
.Xr mos 4 ,
.Xr mue 4 ,
.Xr netintro 4 ,
.Xr smsc 4 ,
.Xr udav 4 ,
.Xr upl 4 ,
.Xr ure 4 ,
.Xr url 4 ,
.Xr urndis 4 ,
.Xr usb 4 ,
.Xr usbnet 9
.Sh HISTORY
The
.Nm
framework first appeared in
.Nx 9.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
framework was written by
.An Matthew R. Green Aq Mt mrg@eterna.com.au