Date: Mon, 30 Oct 2006 15:19:24 -0500 From: John Baldwin <jhb@freebsd.org> To: John Utz <john@utzweb.net> Cc: freebsd-acpi@freebsd.org Subject: Re: Serious Progess Re: smbios.ko probes successfully if i disable acpi sysresource, fails if i do not Message-ID: <200610301519.24918.jhb@freebsd.org> In-Reply-To: <28D1F57D-B976-4EC3-927A-40F09C4465E6@utzweb.net> References: <FBFBCF13-54B0-4825-A115-4CDDE4215CD7@utzweb.net> <4541254E.5020108@root.org> <28D1F57D-B976-4EC3-927A-40F09C4465E6@utzweb.net>
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On Thursday 26 October 2006 22:19, John Utz wrote: > > On Oct 26, 2006, at 2:14 PM, Nate Lawson wrote: > > > John Baldwin wrote: > >> On Thursday 26 October 2006 12:28, Nate Lawson wrote: > >>> John Utz wrote: > >>>> Hello; > >>>> > >>>> as you may know i am attempting to use fbsd's smbios > >>>> functionality to support porting the linux i8k-utils dell smbios > >>>> keyboard and fan stuff. > >>>> > >>>> i just discovered today that disabling sysresource allows the > >>>> module to attach. > >>>> > >>>> so, here's the part that i'd love some help with understanding: > >>>> > >>>> 1. with acpi enabled, is smbios.ko supposed to be asking acpi > >>>> for a resource handle or something? > >>>> > >>>> 2. is acpi_resource.c behaving in error? should it not be > >>>> consuming the smbios startaddr? > >>>> > >>>> note that startaddr for smbios is 0xf000, bios.c looks for > >>>> pnpbios and pcibios starting at 0xe000 and completely ignores > >>>> smbios. > >>>> > >>>> it seems to me that either statement 1 or 2 is correct, but not > >>>> both. > >>>> > >>>> of course, i could be totally wrong, can anybody enlighten me? > >>> ACPI reserves sysresource objects for downstream devices. Then, > >>> those devices get the resources they request via ACPI. Anyway, > >>> all this should be transparent to the downstream devices. They > >>> shouldn't care if they're getting their resources from nexus > >>> (top, pseudo-device) or acpi. > >>> > >>> Are you using bus_alloc_resource() or the equivalent to get the > >>> resources in your driver? > > this was the us$64K question, thankyou for answering it! > > man bus_alloc_resource sez 'dont use this any earlier than attach, > and smbios.c (and several other things) are using it in probe(). > > once i yanked that out of probe, then it cohabitates with acpi They should likely use pmap_mapbios() (pmap_mapdev() on 6.x) to locate and map tables instead. -- John Baldwin
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