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Date: Wed, 13 Jan 2010 23:46:22 -0800 From: Yinghai Lu <yinghai@...nel.org> To: Jeff Garrett <jeff@...rrett.org> CC: linux-kernel@...r.kernel.org, Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org, Jesse Barnes <jbarnes@...tuousgeek.org>, linux-pci@...r.kernel.org, David Airlie <airlied@...ux.ie> Subject: Re: 2.6.33-rc3: pci host bridge windows ignored (works with pci=use_crs) On 01/13/2010 05:24 AM, Jeff Garrett wrote: > On Wed, Jan 13, 2010 at 12:45:17AM -0800, Yinghai Lu wrote: >> On Wed, Jan 13, 2010 at 12:44 AM, Yinghai Lu <yinghai@...nel.org> wrote: >>> On Tue, Jan 12, 2010 at 9:37 PM, Jeff Garrett <jeff@...rrett.org> 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. >>>> ... >>> >>> [ 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 >> not sure why [0xc000000 - 0xcffffff] should work with 00:07.0 checked with intel doc, that is out of scope to LMMIOL register... really don't know how it works with your platform. YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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