Date: Sat, 21 May 2011 15:59:56 +0200 From: "deeptech71@gmail.com" <deeptech71@gmail.com> To: freebsd-current@freebsd.org Subject: Re: pcib allocation failure Message-ID: <BANLkTin4=FTeJeBhv9Tp5DkWo8TbTf-cvA@mail.gmail.com> In-Reply-To: <201105191735.53889.jhb@freebsd.org> References: <BANLkTikTHFTHff5iuPDMxR6zhezEcTaZSA@mail.gmail.com> <201105190813.37908.jhb@freebsd.org> <BANLkTi=DDvse1=igYPNo4xJQ0cHNTapQwA@mail.gmail.com> <201105191735.53889.jhb@freebsd.org>
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On Thu, May 19, 2011 at 11:35 PM, John Baldwin <jhb@freebsd.org> wrote:
> On Thursday, May 19, 2011 12:28:46 pm deeptech71@gmail.com wrote:
>> On Thu, May 19, 2011 at 2:13 PM, John Baldwin <jhb@freebsd.org> wrote:
>> > Yeah, your BIOS continues to behave very poorly. Please try this hack to
> see
>> > if it allows your video to still work with any AGP aperture size:
>> >
>> > Index: pci_pci.c
>> > ===================================================================
>> > --- pci_pci.c (revision 222093)
>> > +++ pci_pci.c (working copy)
>> > @@ -231,7 +231,9 @@ pcib_alloc_window(struct pcib_softc *sc, struct pc
>> > w->name, (uintmax_t)w->base, (uintmax_t)w->limit);
>> > w->base = max_address;
>> > w->limit = 0;
>> > +#if 0
>> > pcib_write_windows(sc, w->mask);
>> > +#endif
>> > return;
>> > }
>> > pcib_activate_window(sc, type);
>>
>> does not.
>
> Hummm, that should leave the PCI-PCI bridge unchanged until we write the new
> values in place so it's never "turned off" (only updated to use a smaller
> range at some point). You could try patching write_windows to disable IO and
> memory decoding in the PCI command register while the windows are frobbed.
>
> Index: pci_pci.c
> ===================================================================
> --- pci_pci.c (revision 222093)
> +++ pci_pci.c (working copy)
> @@ -162,8 +162,13 @@ pcib_write_windows(struct pcib_softc *sc, int mask
> {
> device_t dev;
> uint32_t val;
> + uint16_t cmd;
>
> dev = sc->dev;
> + cmd = pci_read_config(dev, PCIR_COMMAND, 2);
> + if (cmd & (PCIM_CMD_PORTEN | PCIM_CMD_MEMEN))
> + pci_write_config(dev, PCIR_COMMAND,
> + cmd & ~(PCIM_CMD_PORTEN | PCIM_CMD_MEMEN), 2);
> if (sc->io.valid && mask & WIN_IO) {
> val = pci_read_config(dev, PCIR_IOBASEL_1, 1);
> if ((val & PCIM_BRIO_MASK) == PCIM_BRIO_32) {
> @@ -192,6 +197,8 @@ pcib_write_windows(struct pcib_softc *sc, int mask
> pci_write_config(dev, PCIR_PMBASEL_1, sc->pmem.base >> 16, 2);
> pci_write_config(dev, PCIR_PMLIMITL_1, sc->pmem.limit >> 16, 2);
> }
> + if (cmd & (PCIM_CMD_PORTEN | PCIM_CMD_MEMEN))
> + pci_write_config(dev, PCIR_COMMAND, cmd, 2);
> }
>
> static void
> @@ -231,7 +238,9 @@ pcib_alloc_window(struct pcib_softc *sc, struct pc
> w->name, (uintmax_t)w->base, (uintmax_t)w->limit);
> w->base = max_address;
> w->limit = 0;
> +#if 0
> pcib_write_windows(sc, w->mask);
> +#endif
> return;
> }
> pcib_activate_window(sc, type);
that seems to work.
help
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