tree 1a74df64b6e2d4eccf72ce8f1ced377144e6609c
parent 1990da2568a0da79c6011bd83e7f7fb8bb099827
author Eric Anholt <eric@anholt.net> 1393367146 -0800
committer Eric Anholt <eric@anholt.net> 1394826982 -0700

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>