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On 06/17/2009 09:48 PM, Sebastian Redl wrote: |
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> James Ausmus wrote: |
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>> |
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>> On Wed, Jun 17, 2009 at 11:02 AM, Nikos Chantziaras<realnc@×××××.de |
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>> <mailto:realnc@×××××.de>> wrote: |
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>> Just as a note - the Radeon KMS uses a different implementation path |
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>> than the Intel KMS - Intel, in the kernel, uses GEM for gfx memory |
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>> management, while Radeon (and Nouveau, and other upcoming) use the new |
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>> TTM (which is also new for .31) - I don't *think* this will affect how |
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>> X interfaces with the kernel driver, but, since TTM is newer than GEM |
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>> (GEM/Intel KMS happened in .29), it might still be a little bit before |
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>> the wrinkles are worked out. |
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> TTM is actually older than GEM, but the Intel guys didn't like TTM and |
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> invented GEM. But GEM is more of an interface than an implementation. |
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> Intel has their own implementation of the GEM interface, and Radeon and |
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> Nouveau will probably share the TTM-based GEM implementation that has |
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> entered the kernel now. |
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GEM is newer and more suitable for "non high-performance" chips, like |
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integrated graphics chips from Intel. High-performance GPUs (like |
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AMD/ATI) don't come along with GEM very well. |
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