On Tue, September 14, 2010 00:16, Bjorn Helgaas wrote: > On Thursday, September 09, 2010 06:16:33 am Simon Arlott wrote: >> With a Gigabyte GA-MA69VM-S2 690V motherboard, it stalls in >> qurk_usb_early_handoff unless pci=nocrs is used: > > Huh. It looks like the HPET appears as a PCI device, in addition to > being described in the HPET table (and possibly in the ACPI namespace): > > [ 0.000000] ACPI: HPET id: 0x10b9a201 base: 0xfed00000 > [ 0.454232] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) > [ 0.461348] pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] > [ 0.468004] pci_root PNP0A03:00: host bridge window [io 0x0d00-0xffff] > [ 0.474004] pci_root PNP0A03:00: host bridge window [mem 0x000a0000-0x000bffff] > [ 0.481004] pci_root PNP0A03:00: host bridge window [mem 0x000c0000-0x000dffff] > [ 0.489004] pci_root PNP0A03:00: host bridge window [mem 0x80000000-0xfebfffff] > [ 1.034049] pci 0000:00:14.0: no compatible bridge window for [mem 0xfed00000-0xfed003ff] > [ 1.651998] pci 0000:00:14.0: BAR 1: assigned [mem 0x80000000-0x800003ff] > > Since the 00:14.0 BAR looks invalid (it's outside all the host bridge > windows), we moved it to 0x80000000, and that probably broke the HPET > driver, which still thinks it's at 0xfed00000. > > I've heard about this problem, but I haven't ever looked into it in > detail. The best way to handle this would be to figure out why Windows > doesn't have this problem, since it also moves PCI devices in this > situation. You're assuming Windows works on this hardware. > Simon, if you have a way to boot Windows, the output of Everest (free > trial at http://www.lavalys.com/) would be a great help. Windows would take too long to install to try this. > I can see from the stalled.txt log that we did call sb600_disable_hpet_bar(), > and it *looks* like that should have disabled BAR 1. But apparently it > didn't. Would you mind collecting another log with the patch below? Whenever I next need to reboot, I can try the patch, but that won't be soon... > Bjorn > > > diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c > index 6dd8955..f793efd 100644 > --- a/arch/x86/pci/fixup.c > +++ b/arch/x86/pci/fixup.c > @@ -510,6 +510,7 @@ static void sb600_disable_hpet_bar(struct pci_dev *dev) > */ > > pci_read_config_byte(dev, 0x08, &val); > + dev_info(&dev->dev, "read %#02x\n", val); > > if (val < 0x2F) { > outb(0x55, 0xCD6); > @@ -517,7 +518,9 @@ static void sb600_disable_hpet_bar(struct pci_dev *dev) > > /* Set bit 7 in PM register 0x55 */ > outb(0x55, 0xCD6); > - outb(val | 0x80, 0xCD7); > + outb(val | 0x7f, 0xCD7); ? > + dev_info(&dev->dev, "disabled BAR 1 (%pR)\n", > + &dev->resource[1]); > } > } > DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar); > -- Simon Arlott -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
