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sna: Drop forced alignment to 64 on pre-gen4 devices 

Some linear GPU bo that we create must be naturally aligned, and the
extra alignment imposed for pure paranoia is counter productive.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2013-12-02 14:20:51 +00:00
parent 49af22ee55
commit 6889ba38ab
2 changed files with 1 additions and 6 deletions
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6
src/sna/kgem.c
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@ -1258,10 +1258,6 @@ void kgem_init(struct kgem *kgem, int fd, struct pci_device *dev, unsigned gen)
DBG(("%s: maximum batch size? %d\n", __FUNCTION__,
kgem->batch_size));
kgem->min_alignment = 4;
if (gen < 040)
kgem->min_alignment = 64;
kgem->half_cpu_cache_pages = cpu_cache_size() >> 13;
DBG(("%s: last-level cache size: %d bytes, threshold in pages: %d\n",
__FUNCTION__, cpu_cache_size(), kgem->half_cpu_cache_pages));
@ -1424,7 +1420,7 @@ inline static uint32_t kgem_pitch_alignment(struct kgem *kgem, unsigned flags)
return 256;
if (flags & CREATE_SCANOUT)
return 64;
return kgem->min_alignment;
return 4;
}
void kgem_get_tile_size(struct kgem *kgem, int tiling, int pitch,

1
src/sna/kgem.h
View File

@ -158,7 +158,6 @@ struct kgem {
uint16_t nreloc__self;
uint16_t nfence;
uint16_t batch_size;
uint16_t min_alignment;
uint32_t flush:1;
uint32_t need_expire:1;