Date: Tue, 26 Aug 2014 14:42:55 +0000
From: Emmanuel Dreyfus <m...@netbsd.org>
On Tue, Aug 26, 2014 at 10:25:52AM -0400, Christos Zoulas wrote:
> I would probably extend pcictl with cfgread and cfgwrite commands.
Sure, once it works I can do that, but a first attempt just
ets EINVAL, any idea what can be wrong?
...
pbcr.bus = 5;
pbcr.device = 0;
pbcr.function = 0;
pbcr.cfgreg.reg = 0xe6b;
pbcr.cfgreg.val = 0x2e;
Can't do unaligned register reads/writes. If you need other than
32-bit access, you need to select subwords for reads or do R/M/W for
writes.
Inside the kernel, the only EINVAL is here:
if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs ||
bdfr->function > 7)
return EINVAL;
Old kernel sources? I added a check recently for 32-bit alignment --
without which you'd hit a kassert or hardware trap shortly afterward.
