Date: Thu, 19 May 2011 17:35:53 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: "deeptech71@gmail.com" <deeptech71@gmail.com> Subject: Re: pcib allocation failure Message-ID: <201105191735.53889.jhb@freebsd.org> In-Reply-To: <BANLkTi=DDvse1=igYPNo4xJQ0cHNTapQwA@mail.gmail.com> References: <BANLkTikTHFTHff5iuPDMxR6zhezEcTaZSA@mail.gmail.com> <201105190813.37908.jhb@freebsd.org> <BANLkTi=DDvse1=igYPNo4xJQ0cHNTapQwA@mail.gmail.com>
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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);
--
John Baldwin
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