>From Gen8+ we have some workarounds that are applied Per context and they are applied using special batch buffers called as WA batch buffers. HW executes them at specific stages during context save/restore. The patches in this series adds this framework to i915. I did some basic testing on BDW by running glmark2 and didn't see any issues. These WA are mainly required when preemption is enabled. These patches were sent to mailing list before and this series incorporates previous review feedback. [v1] http://lists.freedesktop.org/archives/intel-gfx/2015-February/060707.html [v2] http://www.spinics.net/lists/intel-gfx/msg67804.html [v3] In v2, two separate ring_buffer objects were used to load WA instructions and they were part of every context which is not really required. Chris suggested a better approach of adding a page to context itself and using it for this purpose. Since GuC is also planning to do the same it can probably be shared with GuC. But after discussions it is agreed to use an independent page as GuC area might grow in future. Independent page also makes sense because these WA are only initialized once and not changed afterwards so we can share them across all contexts. Please see the patches for more details. I would really appreciate any review comments on the approach, variable naming or any other comments to upstream these changes. Arun Siluvery (6): drm/i915/gen8: Add infrastructure to initialize WA batch buffers drm/i915/gen8: Re-order init pipe_control in lrc mode drm/i915/gen8: Add WaDisableCtxRestoreArbitration workaround drm/i915/gen8: Add WaFlushCoherentL3CacheLinesAtContextSwitch workaround drm/i915/gen8: Add WaClearSlmSpaceAtContextSwitch workaround drm/i915/gen8: Add WaRsRestoreWithPerCtxtBb workaround drivers/gpu/drm/i915/i915_reg.h | 28 ++++ drivers/gpu/drm/i915/intel_lrc.c | 268 +++++++++++++++++++++++++++++++- drivers/gpu/drm/i915/intel_ringbuffer.h | 9 ++ 3 files changed, 301 insertions(+), 4 deletions(-) -- 2.3.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
