On Mon, Apr 24, 2023 at 05:32:28AM -0600, bent...@openbsd.org wrote: > Hi, > > The AX88179A, which has the same product ID as AX88179, shows up as axen(4), > but doesn't work: > > "axen0: invalid buffer(pkt#1), continue" > https://marc.info/?l=openbsd-bugs&m=164832882524713&w=2 > > gerhard@ sent a diff in that thread that checks the revision and makes > this device fall back to cdce(4). It's gotten a couple of positive test > reports, and works on my device as well (Steam Deck Dock). A downside is > that cdce(4) leaves performance on the table. A CDC/NCM interface could > be better, but there's no driver for it. > > In their current state, these devices have zero performance. Given that, > does it make sense to commit this diff?
I am fine with this approach, ok by me. There is public GPL source code for a Linux driver on the vendor page: https://www.asix.com.tw/en/product/USBEthernet/Super-Speed_USB_Ethernet/AX88179A Click the link under "Linux kernel 5.x/4.x/3.x/2.6.x Driver" and you should get a file called ASIX_USB_NIC_Linux_Driver_Source_v1.1.0.tar.bz2 which contains the equivalent of our axen(4) driver with extra code to support your device in ax88179a_772d.{c,h}. If someone eventually adds support to our axen(4) and then we can flip this device back from cdce(4) to axen(4).
