On Wed, Jan 13, 2010 at 12:44 AM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote: > On Tue, Jan 12, 2010 at 9:37 PM, Jeff Garrett <jeff@xxxxxxxxxxxx> wrote: >> Took a stab at getting the right emails. If I missed anyone, sorry... >> >> I have a desktop machine with a radeon HD 4850, and on recent kernels >> the radeon driver has failed with the message "No valid linear >> framebuffer address". lspci on the broken configuration showed the >> first memory region at d0000000 of the radeon card to be ignored. dmesg >> showed there to be a host bridge window at that address which was also >> ignored. >> >> I haven't quantified "recent" kernel. I was using the Ubuntu/lucid >> kernels and it broke in the 2.6.32-* timeline, at which point I switched >> to vanilla 2.6.33-rc3 to see if that worked. I could probably bisect it >> in a day or two when I get a little time. >> >> Following dmesg's instructions, setting pci=use_crs causes the region >> not to be ignored, and my video works again. >> >> I'm attaching a dmesg from the broken & working configurations, lspci >> -vvv output from the working configuration, and the output of acpidump. >> >> (Between the failed/working, I also applied the patch at >> http://bugzilla.kernel.org/show_bug.cgi?id=14954 >> to get rid of the ACPI-parsing oops. But that only fixed the oops.) > > [ 0.000000] BIOS-provided physical RAM map: > [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) > [ 0.000000] BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) > [ 0.000000] BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) > [ 0.000000] BIOS-e820: 0000000000100000 - 00000000bf790000 (usable) > [ 0.000000] BIOS-e820: 00000000bf790000 - 00000000bf79e000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000bf79e000 - 00000000bf7d0000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bf7d0000 - 00000000bf7e0000 (reserved) > [ 0.000000] BIOS-e820: 00000000bf7ec000 - 00000000c0000000 (reserved) > [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) > [ 0.000000] BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved) > [ 0.000000] BIOS-e820: 0000000100000000 - 0000000340000000 (usable) > ... > > [ 0.833443] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem > 0xe0000000-0xefffffff] (base 0xe0000000) > [ 0.835028] PCI: MMCONFIG at [mem 0xe0000000-0xefffffff] reserved > in ACPI motherboard resources > ... > > [ 0.847449] ACPI: PCI Root Bridge [PCI0] (0000:00) > [ 0.847470] pci_root PNP0A08:00: ignoring host bridge windows from > ACPI; boot with "pci=use_crs" to use them > [ 0.847693] pci_root PNP0A08:00: host bridge window [io > 0x0000-0x0cf7] (ignored) > [ 0.847695] pci_root PNP0A08:00: host bridge window [io > 0x0d00-0xffff] (ignored) > [ 0.847697] pci_root PNP0A08:00: host bridge window [mem > 0x000a0000-0x000bffff] (ignored) > [ 0.847699] pci_root PNP0A08:00: host bridge window [mem > 0x000d0000-0x000dffff] (ignored) > [ 0.847701] pci_root PNP0A08:00: host bridge window [mem > 0xc0000000-0xdfffffff] (ignored) > [ 0.847703] pci_root PNP0A08:00: host bridge window [mem > 0xf0000000-0xfed8ffff] (ignored) > ... > [ 0.848025] IOH bus: [00, fb] > [ 0.848026] IOH bus: 00 index 0 io port: [0, ffff] > [ 0.848028] IOH bus: 00 index 1 mmio: [e0000000, fdffffff] > ... > [ 0.849289] PCI: peer root bus 00 res updated from pci conf > ... > [ 0.849361] pci 0000:04:00.0: reg 10: [mem 0xd0000000-0xdfffffff 64bit pref] > [ 0.849369] pci 0000:04:00.0: reg 18: [mem 0xfbee0000-0xfbeeffff 64bit] > [ 0.849374] pci 0000:04:00.0: reg 20: [io 0xe000-0xe0ff] > [ 0.849381] pci 0000:04:00.0: reg 30: [mem 0xfbec0000-0xfbedffff pref] > [ 0.849423] pci 0000:04:00.1: reg 10: [mem 0xfbefc000-0xfbefffff 64bit] > [ 0.849481] pci 0000:00:07.0: PCI bridge to [bus 04-04] > [ 0.849484] pci 0000:00:07.0: bridge window [io 0xe000-0xefff] > [ 0.849487] pci 0000:00:07.0: bridge window [mem 0xfbe00000-0xfbefffff] > [ 0.849491] pci 0000:00:07.0: bridge window [mem > 0xd0000000-0xdfffffff 64bit pref] > > > it seems HW IOH only can use [e000000 - fdffffff] under that bridge... > > and _CRS said the peer root bus could use [c000000 - dfffffff] > > could be that we need to check other register to decide if we can use > reading from ioh reg directly. can you send out lspci -tvnn lspci -vvxxxx YH -- 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
