On Tue, Feb 20, 2007 at 07:55:36AM -0600, Corey Minyard wrote: > Alexey Starikovskiy wrote: > > Bjorn Helgaas wrote: > >> On Thursday 15 February 2007 22:15, Corey Minyard wrote: > >> > >>> Bjorn Helgaas wrote: > >>> > >>>> On Saturday 10 February 2007 21:27, Len Brown wrote: > >>>> > >>>>> acpi_find_bmc() appears to be searching for multiple SPMI tables > >>>>> in the RSDT and running > >>>>> try_init_acpi() on each of them > >>>>> until it doesn't find any more. > >>>>> > >>>> I can't remember why we look at the SPMI table(s) rather than > >>>> registering a normal ACPI (or even PNP) driver. Unless we > >>>> need to poke the BMC very early, wouldn't it be better to > >>>> rely on the device description in the namespace? > >>>> > >>> For some strange reason the normal ACPI information does not > >>> have all the information needed by the driver. It doesn't have > >>> register size or spacing information. > >>> > >> > >> I guess that would be a defect in the way ACPI is being used, > >> wouldn't it? A PNP ID should define the device programming > >> model, including things like register size and spacing. It > >> sounds like somebody didn't define a new PNP ID when he should > >> have. I wonder whether it's worth trying to fix this. > >> > >> > > Yes, it is considered an ACPI fault. Could you please describe in > > detail, which registers miss the information? And probably your > > acpidump will help as well. > I don't have a machine with an ACPI description of the BMC. I'll copy > the mailing list to see if anyone has an ACPI-described BMC. > > I don't know that much about ACPI, so maybe that information is > described somehow in a way the IPMI spec doesn't talk about directly, > like in the _CRS object. Let me copy my teammate Jordan Hargrave in on this, as he's been working with our BIOS team to implement discovery through an IPI0 object in the namespace, and thinks he can derive the register spacing and interrupt assignment (if any). -- Matt Domsch Software Architect Dell Linux Solutions linux.dell.com & www.dell.com/linux Linux on Dell mailing lists @ http://lists.us.dell.com - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
