Date: Mon, 09 Aug 2004 09:50:23 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: freebsd-hackers@freebsd.org Subject: Re: ISA card and if_ed as module Message-ID: <20040809.095023.103125553.imp@bsdimp.com> In-Reply-To: <200408072049.i77KneE00932@Mail.NOSPAM.DynDNS.dK> References: <200408072049.i77KneE00932@Mail.NOSPAM.DynDNS.dK>
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In message: <200408072049.i77KneE00932@Mail.NOSPAM.DynDNS.dK>
Barry Bouwsma <freebsd-misuser@remove-NOSPAM-to-reply.NOSPAM.dyndns.dk> writes:
: Is it to be expected that the kernel if_ed.ko module appears to
: be unable to probe and attach an ISA NIC, while when I build the
: ed* support into the kernel, it works? This is with RELENG_4.
Yes and No. If the ISA nic is PNP, it will just work. IF not, you
have to have the 'hints' in the kernel. I have the hints framework
backported, but I don't know if it was ever committed.
: Or should kernel modules be able to probe and attach ISA as well
: as pci/pccard devices? Sorry if this is a questions@ type of
: question, but I'd like an explanation too...
pci and pccard are like PNP because the busses are self identifying.
ISA generally isn't a self identifying bus (but pnp changes it just
enough to make things automatic).
: I've added a bunch of debuggery to see which routines get invoked
: at `kldload' time. I see that ed_pci_probe is called a couple of
: times, and at boot a couple more times. However, in neither case
: does my debugging to indicate that any ISA probe might be happening,
: show up, which reflects the total absence of any ed0 messages at
: boot, unless I build the device into the kernel.
Right. Adding it to the config file puts the 'hints' in the right
place.
: If there's a good reason why, I'll be happy to keep ed* in my kernel
: (maybe, I'm not sure if the presence of `miibus' as well causes
: problems with the autoloading of module miibus when other NIC
: modules get loaded...)
I think you should for 4.x. In 5, you can set the hints directly and
leave it as automatic loading.
Warner
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