Finding The E1000 HW

I've been of doing something else for a little while, so I haven't been doing Linux stuff. But as of today, I'm back at it.

So, to recap, I can get my USB drive to boot properly and it loads stage 2. But it can't find my Intel ethernet card when I enter dhcp or bootp. So time to see what I can get it to tell me. The first step--see if I can turn on some debug information.

builtins.c is where there bootp and dhcp commands are found. They probe the drive with eth_probe(...) in config.c and e1000_probe(...) in e1000.c. Turning on DEBUG caused the build to fail. But it was a simple fix--just a printf printing a non-existent field.

So, I'm now in the process of tracking down the problem. I was lead to pci.c where it seems to be failing to find the ethernet card. I can see it looking through the stuff out there on the PCI bus.

I see things that have the Intel vendor ID (0x8086) but none that have an e1000 device ID. So I headed off to check out /proc/bus/pci and found my e1000 NIC device. It has a device ID of 0x109a. Hmmm.... My driver has a list of devices but none go that high.

Well, it's 11:30 at night right now. I guess I'll see what I can do in the morning. But I'm off again. And making progress.