[Intel-gfx] [PATCH 00/18] i915 HW Context Support

Ben Widawsky ben at bwidawsk.net
Sun Mar 18 21:39:40 CET 2012

The patches have changed quite a bit since the RFC, and therefore I
didn't feel comfortable trying to do v2 information. I didn't feel
comfortable taking the few r-bs that I had from the RFC except for the
one patch that I applied wholesale.

- Completely redid the patch splitting.
  The number of patches increased, but LOC is about the same, and a
  handful of the new patches are either because of more splitting, or
  completely new bits.
- Reference counted context allows freeing the data structure and
  freeing the BO independently. This is probably the most significant
- Convert ILK RC6 code to use context code. I'm hopefuly this will make
  things more stable, but have no proof.
- Added trace events for context create/destroy/switch.
- Only support render ring context switch (previous code supported any
  ring, though media ring is the only other ring which *should* work).

Testing summary.
  RC6, just booted to desktop
  module load/unload testing
  20 consecutive suspend resume cycles
  nexuiz with experimental mesa
  piglit quick.tests with experimental mesa
    I've seen time-elapsed, and polygonOffset intermittently fail, I
    believe this is caused by the following...
  Missed IRQs now seem to occur once every other piglit run.
    I have some new code to try to fix this... coming soon, I hope.
  No testing done since RFC

I'll respond to this email with links to what I used to test (code is
currently not in pushable form).

Thanks to Chris Wilson, Daniel Vetter, and Eric Anholt for providing
useful feedback in the RFC.

Ben Widawsky (18):
  drm/i915: CXT_SIZE register offsets added
  drm/i915: preliminary context support
  drm/i915: context basic create & destroy
  drm/i915: add context information to objects
  drm/i915: context switch implementation
  drm/i915: trace events for contexts
  drm/i915: Ivybridge MI_ARB_ON_OFF context w/a
  drm/i915: possibly invalidate TLB before context switch
  drm/i915: use the default context
  drm/i915: switch to default context on idle
  drm/i915: try to reset the gpu before unload
  drm/i915/context: create & destroy ioctls
  drm/i915/context: switch contexts with execbuf2
  drm/i915/context: add params
  drm/i915/context: anonymous context interfaces
  drm/i915: Ironlake rc6 can use context interfaces
  drm/i915: try to enable rc6 on Ironlake... again

 drivers/gpu/drm/i915/Makefile              |    1 +
 drivers/gpu/drm/i915/i915_debugfs.c        |    8 +-
 drivers/gpu/drm/i915/i915_dma.c            |    9 +
 drivers/gpu/drm/i915/i915_drv.c            |    1 +
 drivers/gpu/drm/i915/i915_drv.h            |   43 ++-
 drivers/gpu/drm/i915/i915_gem.c            |   11 +
 drivers/gpu/drm/i915/i915_gem_context.c    |  513 ++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_gem_execbuffer.c |    6 +
 drivers/gpu/drm/i915/i915_reg.h            |   26 ++
 drivers/gpu/drm/i915/i915_trace.h          |   59 ++++
 drivers/gpu/drm/i915/intel_display.c       |   95 +-----
 drivers/gpu/drm/i915/intel_ringbuffer.c    |   49 +++
 drivers/gpu/drm/i915/intel_ringbuffer.h    |   11 +
 include/drm/i915_drm.h                     |   21 +-
 14 files changed, 755 insertions(+), 98 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/i915_gem_context.c


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