commit 2f879356b552ad75bebbafc8d4bc1c97834b8b79
author Eric Anholt <eric@anholt.net> Tue Feb 25 14:25:46 2014 -0800
committer Eric Anholt <eric@anholt.net> Fri Mar 14 12:56:22 2014 -0700
tree 1a74df64b6e2d4eccf72ce8f1ced377144e6609c
parent 1990da2568a0da79c6011bd83e7f7fb8bb099827

i965: Add support for GL_ARB_buffer_storage.

It turns out we can allow COHERENT storage/mappings all the time,
regardless of LLC vs non-LLC.  It just means never using temporary
mappings to avoid GPU stalls, and on non-LLC we have to use the GTT intead
of CPU mappings.  If we were to use CPU maps on non-LLC (which might be
useful if apps end up using buffer_storage on PBO reads, to avoid WC read
slowness), those would be PERSISTENT but not COHERENT, but doing that
would require us driving the clflushes from userspace somehow.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

docs/GL3.txt

diff --git a/docs/GL3.txt b/docs/GL3.txt
index 9758dcc..b7e4c87 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -170,7 +170,7 @@
 
   GLSL 4.4                                             not started
   GL_MAX_VERTEX_ATTRIB_STRIDE                          not started
-  GL_ARB_buffer_storage                                DONE (r300, r600, radeonsi)
+  GL_ARB_buffer_storage                                DONE (i965, r300, r600, radeonsi)
   GL_ARB_clear_texture                                 not started
   GL_ARB_enhanced_layouts                              not started
   GL_ARB_multi_bind                                    started (Fredrik Höglund)