Radeon mem map fix (#2): Need regression tests please

[Erwin Rol]

Hey Benjamin,


I added your patch to the fedora rawhide ati driver and it seems to fix
the hard hang of my machine. 

It does give a endless debug output (due to the RADEON_DEBUG define)
with looks like this;

(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x88020140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x88020140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x88020140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140 
(**) RADEON(0): WaitForIdle (entering): 64 entries, stat=0x00000140

That stat 0x00000140 and 0x88020140 i see most, I also saw a few
0x8802613e since i have no idea what they mean i thought to just pass
that info to you, in case it is useful for something.

- Erwin


On Mon, 2005-12-19 at 17:36 +1100, Benjamin Herrenschmidt wrote:
> On Mon, 2005-12-19 at 17:07 +1100, Benjamin Herrenschmidt wrote:
> 
> > I think I've get something in shape for getting the radeon memory map
> > finally sane, removing all sort of hacks, and possibly fixing all sort
> > of weird bugs. It works best with the very latest radeon DRM fixes to
> > the same area but might well improve things all by itself
> 
>   .../...