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i965: Use drm_intel_get_aperture_sizes instead of hard-coded 2GiB

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Systems with little physical memory installed will report less than
2GiB, and some systems may (hypothetically?) have a larger address space
for the GPU.  My IVB still reports 1534.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "10.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit cb6182bdfa)
This commit is contained in:
Ian Romanick 2013-11-11 10:57:55 -08:00
parent e5839c2397
commit 1e51d3a668
1 changed files with 7 additions and 3 deletions
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10
src/mesa/drivers/dri/i965/intel_screen.c
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@ -824,10 +824,14 @@ brw_query_renderer_integer(__DRIscreen *psp, int param, int *value)
/* Once a batch uses more than 75% of the maximum mappable size, we
* assume that there's some fragmentation, and we start doing extra
* flushing, etc. That's the big cliff apps will care about.
*
* Can only map 2G onto the GPU through the GTT.
*/
const unsigned gpu_mappable_megabytes = 2 * 1024 * 3 / 4;
size_t aper_size;
size_t mappable_size;
drm_intel_get_aperture_sizes(psp->fd, &mappable_size, &aper_size);
const unsigned gpu_mappable_megabytes =
(aper_size / (1024 * 1024)) * 3 / 4;
const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
const long system_page_size = sysconf(_SC_PAGE_SIZE);