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sna: Limit available space for gen2 

Since pre-g33 chipsets impose massive alignment restrictions on objects
within the aperture we need to further restrict the amount of available
space to be sure we have sufficient room to accommodate the alignment.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-10-11 08:42:21 +01:00
parent d3ae85dd01
commit 94a98d1c47
1 changed files with 5 additions and 0 deletions
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5
src/sna/kgem.c
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@ -888,6 +888,11 @@ void kgem_init(struct kgem *kgem, int fd, struct pci_device *dev, int gen)
kgem->aperture_total = aperture.aper_size;
kgem->aperture_high = aperture.aper_size * 3/4;
kgem->aperture_low = aperture.aper_size * 1/3;
if (gen < 33) {
/* Severe alignment penalties */
kgem->aperture_high /= 2;
kgem->aperture_low /= 2;
}
DBG(("%s: aperture low=%d [%d], high=%d [%d]\n", __FUNCTION__,
kgem->aperture_low, kgem->aperture_low / (1024*1024),
kgem->aperture_high, kgem->aperture_high / (1024*1024)));