| Summary: | Intel PCI bridges are subtractive but don't report it... | ||||||
|---|---|---|---|---|---|---|---|
| Product: | xorg | Reporter: | Dave Airlie <airlied> | ||||
| Component: | Server/DDX/Xorg | Assignee: | Adam Jackson <ajax> | ||||
| Status: | RESOLVED FIXED | QA Contact: | |||||
| Severity: | normal | ||||||
| Priority: | high | CC: | alexdeucher, eich, idr, thomas.bettler, Tobias | ||||
| Version: | git | Keywords: | patch | ||||
| Hardware: | x86 (IA32) | ||||||
| OS: | Linux (All) | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
| Bug Depends on: | |||||||
| Bug Blocks: | 5041 | ||||||
| Attachments: |
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Description
Dave Airlie
2006-04-26 14:16:52 UTC
Created attachment 5478 [details] [review] patch to fix Intel bridges This patch detects the PCI bridges concerened, it also removes the BIOS range from the sys reserved ranges, as Linux doesn't report this, in fact it should really use the E820 table to figure it out, or better yet X shouldn't do any of this on Linux... talked on IRC to Egbert, checked into HEAD. Ajax you might want to consider this for 7.1, the top bit at least, for dual-card setups. Patch looks OK. I'm not particularly fond of having to blacklist things in the code but the broken HW is to blame here. The BIOS range seems to be a legacy from some old HW. I don't have a strong opinion on this. *** Bug 5443 has been marked as a duplicate of this bug. *** Would this affect me? I have an intel bridge but I don't understand what the pci_device&0xff00==0x2400 test does: 0000:00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2) (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Bus: primary=00, secondary=02, subordinate=02, sec-latency=64 I/O behind bridge: 0000c000-0000dfff Memory behind bridge: efe00000-f7efffff Prefetchable memory behind bridge: e7b00000-efbfffff BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B- top bit definitely looks good for 7.1. would like a stronger vote either way on the bios range tweak. i lie. applied to 7.1 branch, thanks! |
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