New acceleration architecture

[Thomas Winischhofer]

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Adam Jackson wrote:
> On Wednesday 29 June 2005 16:29, Thomas Winischhofer wrote:
> 
>>Eric Anholt wrote:
>>
>>>Yep.  In KAA drivers you would save out whatever bits you needed to some
>>>global variable in the Prepare call.  I always thought that was a bit
>>>ugly, but it worked.
>>
>>But please... I very much hope this isn't meant to be this way. Am I
>>supposed to store my pSiS at a global location...? Especially great for
>>dual head...
> 
> 
> Technically you don't need to care about doing it per-screen.  The server's 
> single threaded, you're not going to get your state corrupted between the 
> prepare and body calls.
> 
> Not that that's pretty, or amenable to server rearchitecting.  I'd prefer that 
> the body calls have a pScreen too.

Basically, my concern wasn't saving the accel engine bits somewhere, but
getting a pointer to my command ringbuffer and the MMIO area. Can't do
without my pSiS (where the offset to the current command queue position
is stored)...

Thomas

- --
Thomas Winischhofer
Vienna/Austria
thomas AT winischhofer DOT net          http://www.winischhofer.net/
twini AT xfree86 DOT org
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