Hi Ben,
Thank you for the patch :)
I have two concerns about it:
1) It does not appear to be R300 specific - why doesn't similar
Radeon ioctl work ? Also, I would imagine that this would
require a change in r300 driver to work, wouldn't it ?
2) I was able to play Quake for somewhat prolonged periods, I don't think this would have really worked if aging was truly broken, though, maybe, I am wrong on this one.
Would you have a test app that shows brokenness ? Perhaps
something that uses a lot of textures once.Also, if aging does not work on your setup, it might have to do with amount of system RAM and memory controller settings. I *was* wondering why
fbLocation is 0 for R300. If so, this needs to be fixed in the 2d driver.
best
Vladimir Dergachev
On Sun, 6 Feb 2005, Ben Skeggs wrote:
Hello Vladimir,
I've attached a patch which implements the RADOEN_CMD_DMA_DISCARD ioctl from
the radeon/r200 drm. I thought I'd post here before commiting to cvs in case I've
done something bad.
Without this, eventually r300AllocDmaRegion will get stuck in a loop continually calling
drmDMA (r300_ioctl.c::r300RefillCurrentDmaRegion).
It seems that the drm buffer management code depends on having a scratch register
containing the "age" of a buffer. I'm not sure of the details, I just know that it stops
the infinite drmDMA loop.
Is this the correct way of fixing this? Or have I completely missed something?
Regards, Ben Skeggs.
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