i965: Add support for GL_ARB_buffer_storage

Graphics / Mesa 3D Graphics Library / Mesa - Eric Anholt [anholt.net] - 14 March 2014 14:56 EDT

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.

2f87935 i965: Add support for GL_ARB_buffer_storage.
docs/GL3.txt | 2 +-
src/mesa/drivers/dri/i965/intel_buffer_objects.c | 9 +++++++--
src/mesa/drivers/dri/i965/intel_extensions.c | 1 +
3 files changed, 9 insertions(+), 3 deletions(-)

Upstream: cgit.freedesktop.org


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