Mesa (master): i965: Use drm_intel_get_aperture_sizes instead of hard-coded 2GiB
Ian Romanick
idr at kemper.freedesktop.org
Thu Nov 14 02:53:14 UTC 2013
Module: Mesa
Branch: master
Commit: cb6182bdfa7c8a5a773ec21112886f742df99840
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=cb6182bdfa7c8a5a773ec21112886f742df99840
Author: Ian Romanick <ian.d.romanick at intel.com>
Date: Mon Nov 11 10:57:55 2013 -0800
i965: Use drm_intel_get_aperture_sizes instead of hard-coded 2GiB
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 at intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: "10.0" <mesa-stable at lists.freedesktop.org>
---
src/mesa/drivers/dri/i965/intel_screen.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 6bcfe2c..10ebfb1 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -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);
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