Re: X server through the xsrc sets on PowerBook G4 with NVidia card

[Michael <macallan%netbsd.org@localhost>]

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Hello,

On Mar 21, 2010, at 7:46 PM, Taylor R Campbell wrote:

>   Date: Sun, 21 Mar 2010 19:29:35 -0400
>   From: Michael <macallan%netbsd.org@localhost>
>
>   Probably Yet Another Dumbass Linuxism - unlike NetBSD Linux lets you
>   map unused PCI space, and apparently the driver doesn't bother
>   checking if the mmap() succeeded. What we need is the pcictl dump
>   output for the graphics chip ( or alternatively, your /var/log/Xorg.
>   0.log, it should provide the relevant information as well ), I'd
>   almost bet the driver tries to map more than the graphic chip's BARs
>   cover.
>
> $ pcictl pci0 list
>    Base address register at 0x10
>      type: 32-bit nonprefetchable memory
>      base: 0x91000000, not sized
>    Base address register at 0x14
>      type: 32-bit prefetchable memory
>      base: 0x94000000, not sized
>    Base address register at 0x18
>      type: 32-bit prefetchable memory
>      base: 0x00000000, not sized

vs.
> 1067      1 Xorg     CALL  mmap(0,0x1000000,3,1,7,0,0,0x91000000)

hrm, there goes that theory.
I don't really see a good reason why the mmap() call would fail,  
unless you're using some odd and old kernel, or your X packages are  
significantly newer then the kernel. Please check if your kernel's  
pci_usrreq.c is version 1.16.6.3, or if it's newer than 9/16/2009.

have fun
Michael

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