[Savage40] New Savage DRM preview

[Felix Kühling]

When my original messages hit the Savage40 list it was already outdated.
I got approval for my generic changes in the DRM very quickly (thanks to
Dave Airlie for his feedback) and committed my work to X.Org, Mesa and
DRM CVS on January 1st.

I updated the S3Savage status page in the DRI Wiki (moved to
freedesktop.org recently: http://dri.freedesktop.org/wiki/S3Savage).
I'll try to keep that page up-to-date as I make important changes to the
driver. You can subscribe to that page in order to receive email
notifications.

Happy New Year!

  Felix

Am Mi, den 29.12.2004 schrieb Felix Kühling um 18:29: 
> Hi all,
> 
> After a few coding night shifts over the holidays the development of the
> new Savage DRM driver finally reached a stage where I am pretty
> confident that no more binary-incompatible changes to the interfaces
> between DDX, DRM and the 3D driver will be needed. I uploaded my work in
> the form of three patches to http://freedesktop.org/~fxkuehl/savage. I
> am going to get this committed to the various CVS repositories ASAP so
> that all further work can happen under version control again. Anybody
> who is comfortable with compiling X.org, DRM and Mesa from source should
> apply these patches and test them. It's worth it! :-) (see the Feature
> summary below)
> 
> IMPORTANT: If you get lockups with these patches try enabling
> ShadowStatus in xorg.conf. This fixed lockups related to vertex DMA on
> all hardware I tested. In fact, I would be surprised if anyone got away
> without lockups without ShadowStatus. Therefore a future version of the
> driver may refused to enable DRI if ShadowStatus is disabled.
> 
> Feature summary:
>       * Version numbers of DRM and DDX were bumped to 2.0.0 in order to
>         reflect the binary incompatibility to previous versions.
>       * Secure DRM and DDX drivers that do not allow unprivileged 3D
>         applications direct access to the hardware.
>       * Should be stable on a larger variety of hardware by using shadow
>         status in the DRM if it is enabled in xorg.conf.
>       * Better performance by using vertex DMA when possible.
> 
> Because of experimentation with the binary interfaces I kept my work out
> of CVS for quite some time. I tried to limit the amount of changes to
> what was absolutely necessary in order to get things working properly.
> There are some features which will be implemented in the near future.
> Some of them are already sketched in the patches but not implemented
> yet. See the TODO list for details.
> 
> TODO:
>       * Apply clipping rectangles to 3D drawing commands.
>       * Support for PCI cards.
>       * Command DMA on Savage4-based hardware for better performance.
>       * Use DMA for texture uploads.
>       * Implement a fast path with less overhead that makes more
>         efficient use of available hardware primitives.
> 
> Best regards,
>   Felix Kühling

-- 
| Felix Kühling <fxkuehl at gmx.de>                     http://fxk.de.vu |
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