[Intel-gfx] [RFC 0/7] mkwrite_device_info removal

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Some time ago we discussed the long term goal or removing the
mkwrite_device_info hack in favour of splitting device info to a truly read-only
and runtime halfves. This series attempts to do that.

Approach taken is to identify three classes of device info members:

  1. Only set in static const tables.
  2. Set in static const tables and modified at runtime.
  3. Only set at runtime.

First set is left as is.

Third set is moved from const device_info into a newly created
runtime_device_info and all accessors and use sites are converted to look at the
new location.

Second set is duplicated in both device info structures, but the const copy is
only used to copy over the respective members early on driver load. Otherwise
the process is the same as for the third group.

End result is complete removal of mkwrite_device_info and removal of the
embedded copy of device info stored in dev_priv/i915, which is now replaced
with a pointer to the actual read-only/static const table.

Apart from the conceptual cleanup this has the benefit of making the static
tables smaller since they are duplicated by the amount of platforms. And
dev_priv/i915 is also smaller since it doesn't hold a copy of the whole
device info.

On rough edge however is the copying over of group two members on driver load. I
haven't found a nice automatic way to do it so at the moment it relies on
manually adding lines to i915_driver_create.

Last patch of the series if probably best omitted since I think double
underscore protection actually works well for preventing mistakes in any future
work.

Tvrtko Ursulin (7):
  drm/i915: Remove has_pooled_eu static initializer
  drm/i915: Introduce runtime device info
  drm/i915: Move all runtime modified device info fields into runtime
    info
  drm/i915: Remove mkwrite_device_info
  drm/i915: Move gen and platform mask to runtime device info
  drm/i915: Introduce subplatform concept
  drm/i915: Remove double underscore from static device info member
    names

 drivers/gpu/drm/i915/i915_debugfs.c           |  31 ++-
 drivers/gpu/drm/i915/i915_drv.c               |  71 +++++--
 drivers/gpu/drm/i915/i915_drv.h               | 191 ++++++++----------
 drivers/gpu/drm/i915/i915_gem.c               |   5 +-
 drivers/gpu/drm/i915/i915_gem_gtt.c           |   2 +-
 drivers/gpu/drm/i915/i915_gpu_error.c         |  19 +-
 drivers/gpu/drm/i915/i915_gpu_error.h         |   1 +
 drivers/gpu/drm/i915/i915_irq.c               |   2 +-
 drivers/gpu/drm/i915/i915_pci.c               |   5 +-
 drivers/gpu/drm/i915/i915_perf.c              |   5 +-
 drivers/gpu/drm/i915/i915_query.c             |   2 +-
 drivers/gpu/drm/i915/i915_reg.h               | 190 ++++++++---------
 drivers/gpu/drm/i915/intel_bios.c             |   2 +-
 drivers/gpu/drm/i915/intel_device_info.c      | 178 +++++++++++-----
 drivers/gpu/drm/i915/intel_device_info.h      |  82 ++++++--
 drivers/gpu/drm/i915/intel_display.c          |  20 +-
 drivers/gpu/drm/i915/intel_display.h          |  10 +-
 drivers/gpu/drm/i915/intel_engine_cs.c        |   9 +-
 drivers/gpu/drm/i915/intel_fbc.c              |   2 +-
 drivers/gpu/drm/i915/intel_fbdev.c            |   4 +-
 drivers/gpu/drm/i915/intel_guc_submission.c   |   4 +-
 drivers/gpu/drm/i915/intel_i2c.c              |   2 +-
 drivers/gpu/drm/i915/intel_lpe_audio.c        |   2 +-
 drivers/gpu/drm/i915/intel_lrc.c              |  14 +-
 drivers/gpu/drm/i915/intel_pm.c               |  11 +-
 drivers/gpu/drm/i915/intel_ringbuffer.c       |   4 +-
 drivers/gpu/drm/i915/intel_ringbuffer.h       |   4 +-
 drivers/gpu/drm/i915/intel_uncore.c           |   4 +-
 drivers/gpu/drm/i915/intel_workarounds.c      |   6 +-
 drivers/gpu/drm/i915/selftests/huge_pages.c   |  18 +-
 .../gpu/drm/i915/selftests/i915_gem_context.c |   6 +-
 drivers/gpu/drm/i915/selftests/intel_guc.c    |   4 +-
 drivers/gpu/drm/i915/selftests/intel_lrc.c    |   4 +-
 .../gpu/drm/i915/selftests/mock_gem_device.c  |  11 +-
 34 files changed, 527 insertions(+), 398 deletions(-)

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula at intel.com>
-- 
2.19.1