Date: Tue, 01 Sep 1998 23:58:30 +0000 From: Mike Smith <mike@smith.net.au> To: Wilko Bulte <wilko@yedi.iaf.nl> Cc: FreeBSD-hackers@FreeBSD.ORG (FreeBSD hackers list) Subject: Re: pci memory mapping Message-ID: <199809012358.XAA01477@word.smith.net.au> In-Reply-To: Your message of "Wed, 02 Sep 1998 00:05:04 %2B0200." <199809012205.AAA29093@yedi.iaf.nl>
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> Hi there,
>
> I'm trying to get a Mylex DAC960PD to work with a driver skeleton Ulf
> wrote. As I have a different Mylex board than Ulf (a PD iso a PG) I need
> to make some changes.
>
> For some reason the followin code in attach() fails:
>
> if (!pci_map_mem(config_id, PCI_MAP_REG_START, &mp->vbase,
> &mp->pbase)) {
> printf("myx%d: couldn't map memory\n", unit);
> goto fail;
> }
Is PCI_MAP_REG_START the correct configuration register index for the
memory-mapped region? It might help seeing the 'boot -v' output for
this device from your system.
> >From a previous post by Bill Paul I get the impression (...) that I might need
> to enable memory mapping by doing a pci_conf_write(). But what params
> do I feed pci_conf_write()?
The config id, the register you want to write, and its value. You can
determine these from the documentation for the PCI device you're
talking to, or in some cases the PCI spec itself.
> Interestingly enough for Ulf's board things work OK.
Sounds like it defaults to enabling the memory-mapped region, where
yours doesn't.
--
\\ Sometimes you're ahead, \\ Mike Smith
\\ sometimes you're behind. \\ mike@smith.net.au
\\ The race is long, and in the \\ msmith@freebsd.org
\\ end it's only with yourself. \\ msmith@cdrom.com
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