Date: Sun, 26 Aug 2001 08:40:55 -0700 From: unsafe at any speed <erich@ucsd.edu> To: Warner Losh <imp@harmony.village.org> Cc: mobile@FreeBSD.ORG, doc@FreeBSD.ORG Subject: Re: MFC: ISA routing support Message-ID: <3B891887.2060908@ucsd.edu> References: <200108260507.f7Q570W08734@harmony.village.org>
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Works on the Thinkpad 560X! For some reason I'm getting IRQs that aren't in my /etc/pccard.conf assigned to my cards (15, 13), but I'm hoping that's because my world is a few days out of date. Am building world now... Thanks yet again for all your work on this, Warner. This must have been really frustrating for you. Eric Hedstrom erich@ucsd.edu Warner Losh wrote: > [[doc is cc'd so that they can put this in the right release-noteish place]] > > I've implmented the first cut of ISA routing support for PCI devices. > There are just too many machines that FreeBSD can't seem to use their > PCIBIOS to route interrupts :-(. > > So, if you CVSUP after 2001/08/26 04:48:47 GMT (well, give the mirrors > some time to propigate), you will have the following option. > > If your laptop cannot route PCI interrupts with FreeBSD's current > interrupt routing scheme, please use ISA interrupts. To enable ISA > interrupts, you need to set two tunables. A tunable is generally set > in /boot/loader.conf by adding a line that says: > tunable="value" > They may also be set, for testing purposes, at the "ok" command line > prompt using the set command: > ok set tunable="value" > > The first tunable is "hw.pcic.intr_path". Setting this to 1 will > force the PCI pcic attachment to use ISA routing. It has no effect on > the ISA pcic attachment. Almost all will be configured as it was > before. However, since you cannot set irq values for pci interrupts, > the second tunable "hw.pcic.irq" is used. This tunable sets which IRQ > to use for the CSC (aka management) interrupt. 0 is polling, and the > recommended value. Systems with two slots must currently use polling > mode (this will be fixed soon, btw). Systems with one slot may elect > to use an interrupt for the CSC. > > Summary: > To put things into ISA mode, add the following two lines to > /boot/loader.conf: > hw.pcic.intr_path=1 > hw.pcic.irq=0 > Add free IRQs to /etc/pccard.conf for cards to use. > > I was successful at using this on my pc98 laptop that doesn't have a > PIR table, and likely won't be able to route interrupts properly > (since the cbus-pci bridge chip is thinly documented at best). I was > able to use a 3C589E and commit using the new kernel from this box. > > Most of this information is contained in the new pcic.4 man page. > > Those of you having problems with the PCI BIOS interrupt routing, or > if you have a CL-PD6729 or '6730 in your laptop, please try to use ISA > path for the interrupts and let me know if it works or fails. If you > have a pccardd built from sources that are newer than August 21, you > can just boot test kernels with that pccardd and things should work. > (cardd.c revision 1.46.2.14 is the good version, it works with both > old (back to at least 4.2) and new kernels). > > I'll put together a web form with all the information I'll need for > bug reports tomorrow or monday. I gotta write my USENIX paper on this > whole experience still. > > Warner > > P.S. Please accept my profuse appologies for the high rate of change > in pccard in -stable. Given the long shakeout time in -current I > thought that there wouldn't be near this many issues. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-mobile" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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