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sna: Align allocations with partial buffers to 64 bytes. 

A magic number required for so many functions of the GPU. In this
particular case it is likely to be that the offset of a texture in the
GTT has to have a minimum alignment of 64 bytes.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=46415
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-03-02 20:18:32 +00:00
parent 4918e309df
commit 599cd0e8ef
1 changed files with 7 additions and 2 deletions
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9
src/sna/kgem.c
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@ -3391,6 +3391,7 @@ struct kgem_bo *kgem_create_buffer(struct kgem *kgem,
__FUNCTION__, bo->write, flags));
continue;
}
assert(bo->mmapped || bo->need_io);
} else {
if (bo->write & KGEM_BUFFER_WRITE) {
DBG(("%s: skip write %x buffer, need %x\n",
@ -3548,6 +3549,9 @@ struct kgem_bo *kgem_create_buffer(struct kgem *kgem,
list_init(&bo->base.list);
free(old);
assert(bo->base.tiling == I915_TILING_NONE);
assert(num_pages(&bo->base) >= NUM_PAGES(size));
bo->mem = kgem_bo_map(kgem, &bo->base);
if (bo->mem) {
bo->need_io = false;
@ -3564,11 +3568,11 @@ struct kgem_bo *kgem_create_buffer(struct kgem *kgem,
}
}
#else
alloc = ALIGN(size, 64*1024) / PAGE_SIZE;
flags &= ~KGEM_BUFFER_INPLACE;
#endif
/* Be more parsimonious with pwrite/pread buffers */
if ((flags & KGEM_BUFFER_INPLACE) == 0)
alloc = PAGE_ALIGN(size) / PAGE_SIZE;
alloc = NUM_PAGES(size);
flags &= ~KGEM_BUFFER_INPLACE;
if (kgem->has_vmap) {
@ -3700,6 +3704,7 @@ init:
__FUNCTION__, alloc, bo->base.handle));
done:
bo->used = ALIGN(bo->used, 64);
/* adjust the position within the list to maintain decreasing order */
alloc = bytes(&bo->base) - bo->used;
{