Adding RTL8153 support to rue(4) USB to Ethernet driver

David Horwitt david at aogsquid.ucsd.edu
Wed Oct 19 18:07:07 UTC 2016 

Reviving a thread from June,2015...

My brand-spanking new XPS 13 has a dongle for the Thunderbolt port that implements a RTL8153, which
is recognized by my system (FreeBSD 11.0-RELEASE-p1 #8: Tue Oct 18 22:57:49 PDT 2016):
  Oct 19 07:11:01 TWE6 kernel: ugen1.3: <BILLBOARD CLASS> at usbus1
  Oct 19 07:11:02 TWE6 kernel: ugen1.4: <GenesysLogic2> at usbus1
  Oct 19 07:11:02 TWE6 kernel: uhub3: <GenesysLogic2> on usbus1
  Oct 19 07:11:02 TWE6 kernel: uhub3: 4 ports with 3 removable, self powered
  Oct 19 07:11:03 TWE6 kernel: ugen1.5: <Realtek> at usbus1
  Oct 19 07:11:03 TWE6 kernel: cdce0: <CDC Communications Control> on usbus1
  Oct 19 07:11:03 TWE6 kernel: ue0: <USB Ethernet> on cdce0
  Oct 19 07:11:03 TWE6 kernel: ue0: Ethernet address: 00:24:9b:1d:90:e5
NB: the MAC address matches that inscribed on the dongle.

usbconfig info:
  ugen1.5: <USB 101001000 LAN Realtek> at usbus1, cfg=1 md=HOST spd=SUPER (5.0Gbps) pwr=ON (64mA)
NB: cfg=1 which should be correct for if_cdce and RTL8153. This was verified by
'usbconfig -d 1.5 dump_curr_config_desc" (complete configs dumped below).

I manually set the IP address:
  ue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
         ether 00:24:9b:1d:90:e5
         inet 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255
         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

The problem is, "it doesn't work'.

Using wireshark on a ping target machine, I can see that the XPS outputs packets (which look correct), but it
doesn't seem to be receiving the replies. When I set 'sysctl -a hw.usb.cdce.debug=1' I get a constant (~ 5Hz) stream
of "cdce_intr_read_callback: Received 24 bytes" whether there is network traffic or not; when I ping the XPS
this message doesn't change.

The hardware/cable works OK under Windows.

Any guidance is appreciated; TIA
David

usbconfig -d 1.5 dump_all_config_desc
ugen1.5: <USB 101001000 LAN Realtek> at usbus1, cfg=1 md=HOST spd=SUPER (5.0Gbps) pwr=ON (64mA)


  Configuration index 0

     bLength = 0x0009
     bDescriptorType = 0x0002
     wTotalLength = 0x0039
     bNumInterfaces = 0x0001
     bConfigurationValue = 0x0001
     iConfiguration = 0x0000  <no string>
     bmAttributes = 0x00a0
     bMaxPower = 0x0020

     Interface 0
       bLength = 0x0009
       bDescriptorType = 0x0004
       bInterfaceNumber = 0x0000
       bAlternateSetting = 0x0000
       bNumEndpoints = 0x0003
       bInterfaceClass = 0x00ff  <Vendor specific>
       bInterfaceSubClass = 0x00ff
       bInterfaceProtocol = 0x0000
       iInterface = 0x0000  <no string>

      Endpoint 0
         bLength = 0x0007
         bDescriptorType = 0x0005
         bEndpointAddress = 0x0081  <IN>
         bmAttributes = 0x0002  <BULK>
         wMaxPacketSize = 0x0400
         bInterval = 0x0000
         bRefresh = 0x0000
         bSynchAddress = 0x0000

       Additional Descriptor

       bLength = 0x06
       bDescriptorType = 0x30
       bDescriptorSubType = 0x03
        RAW dump:
        0x00 | 0x06, 0x30, 0x03, 0x00, 0x00, 0x00


      Endpoint 1
         bLength = 0x0007
         bDescriptorType = 0x0005
         bEndpointAddress = 0x0002  <OUT>
         bmAttributes = 0x0002  <BULK>
         wMaxPacketSize = 0x0400
         bInterval = 0x0000
         bRefresh = 0x0000
         bSynchAddress = 0x0000

       Additional Descriptor

       bLength = 0x06
       bDescriptorType = 0x30
       bDescriptorSubType = 0x03
        RAW dump:
        0x00 | 0x06, 0x30, 0x03, 0x00, 0x00, 0x00


      Endpoint 2
         bLength = 0x0007
         bDescriptorType = 0x0005
         bEndpointAddress = 0x0083  <IN>
         bmAttributes = 0x0003  <INTERRUPT>
         wMaxPacketSize = 0x0002
         bInterval = 0x0008
         bRefresh = 0x0000
         bSynchAddress = 0x0000

       Additional Descriptor

       bLength = 0x06
       bDescriptorType = 0x30
       bDescriptorSubType = 0x00
        RAW dump:
        0x00 | 0x06, 0x30, 0x00, 0x00, 0x02, 0x00




  Configuration index 1

     bLength = 0x0009
     bDescriptorType = 0x0002
     wTotalLength = 0x0062
     bNumInterfaces = 0x0002
     bConfigurationValue = 0x0002
     iConfiguration = 0x0000  <no string>
     bmAttributes = 0x00a0
     bMaxPower = 0x0020

     Interface 0
       bLength = 0x0009
       bDescriptorType = 0x0004
       bInterfaceNumber = 0x0000
       bAlternateSetting = 0x0000
       bNumEndpoints = 0x0001
       bInterfaceClass = 0x0002  <Communication device>
       bInterfaceSubClass = 0x0006
       bInterfaceProtocol = 0x0000
       iInterface = 0x0005  <CDC Communications Control>

       Additional Descriptor

       bLength = 0x05
       bDescriptorType = 0x24
       bDescriptorSubType = 0x00
        RAW dump:
        0x00 | 0x05, 0x24, 0x00, 0x10, 0x01


       Additional Descriptor

       bLength = 0x05
       bDescriptorType = 0x24
       bDescriptorSubType = 0x06
        RAW dump:
        0x00 | 0x05, 0x24, 0x06, 0x00, 0x01


       Additional Descriptor

       bLength = 0x0d
       bDescriptorType = 0x24
       bDescriptorSubType = 0x0f
        RAW dump:
        0x00 | 0x0d, 0x24, 0x0f, 0x03, 0x00, 0x00, 0x00, 0x00,
        0x08 | 0xea, 0x05, 0x00, 0x00, 0x00


      Endpoint 0
         bLength = 0x0007
         bDescriptorType = 0x0005
         bEndpointAddress = 0x0083  <IN>
         bmAttributes = 0x0003  <INTERRUPT>
         wMaxPacketSize = 0x0010
         bInterval = 0x0008
         bRefresh = 0x0000
         bSynchAddress = 0x0000

      Additional Descriptor

       bLength = 0x06
       bDescriptorType = 0x30
       bDescriptorSubType = 0x00
        RAW dump:
        0x00 | 0x06, 0x30, 0x00, 0x00, 0x08, 0x00



     Interface 1
       bLength = 0x0009
       bDescriptorType = 0x0004
       bInterfaceNumber = 0x0001
       bAlternateSetting = 0x0000
       bNumEndpoints = 0x0000
       bInterfaceClass = 0x000a  <CDC-data>
       bInterfaceSubClass = 0x0000
       bInterfaceProtocol = 0x0000
       iInterface = 0x0000  <no string>


     Interface 1 Alt 1
       bLength = 0x0009
       bDescriptorType = 0x0004
       bInterfaceNumber = 0x0001
       bAlternateSetting = 0x0001
       bNumEndpoints = 0x0002
       bInterfaceClass = 0x000a  <CDC-data>
       bInterfaceSubClass = 0x0000
       bInterfaceProtocol = 0x0000
       iInterface = 0x0004  <Ethernet Data>

      Endpoint 0
         bLength = 0x0007
         bDescriptorType = 0x0005
         bEndpointAddress = 0x0081  <IN>
         bmAttributes = 0x0002  <BULK>
         wMaxPacketSize = 0x0400
         bInterval = 0x0000
         bRefresh = 0x0000
         bSynchAddress = 0x0000

       Additional Descriptor

       bLength = 0x06
       bDescriptorType = 0x30
       bDescriptorSubType = 0x03
        RAW dump:
        0x00 | 0x06, 0x30, 0x03, 0x00, 0x00, 0x00


      Endpoint 1
         bLength = 0x0007
         bDescriptorType = 0x0005
         bEndpointAddress = 0x0002  <OUT>
         bmAttributes = 0x0002  <BULK>
         wMaxPacketSize = 0x0400
         bInterval = 0x0000
         bRefresh = 0x0000
         bSynchAddress = 0x0000

       Additional Descriptor

       bLength = 0x06
       bDescriptorType = 0x30
       bDescriptorSubType = 0x03
        RAW dump:
        0x00 | 0x06, 0x30, 0x03, 0x00, 0x00, 0x00

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