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    • Chris Wilson's avatar
      drm/i915: Convert i915_reset.c over to using uncore mmio · 95007efb
      Chris Wilson authored
      Currently i915_reset.c mixes calls to intel_uncore, pci and our old
      style I915_READ mmio interfaces. Cast aside the old implicit macros,
      and harmonise on using uncore throughout.
      
      add/remove: 1/1 grow/shrink: 0/4 up/down: 65/-207 (-142)
      Function                                     old     new   delta
      rmw_register                                   -      65     +65
      gen8_reset_engines                           945     942      -3
      g4x_do_reset                                 407     376     -31
      intel_gpu_reset                              545     509     -36
      clear_register                                63       -     -63
      i915_clear_error_registers                   461     387     -74
      
      A little bit of pointer dancing elimination works wonders.
      
      v2: Roll up the helpers into intel_uncore for general use
      
      With the helpers gcc was a little more eager to inline:
      add/remove: 0/1 grow/shrink: 1/3 up/down: 99/-133 (-34)
      Function                                     old     new   delta
      i915_clear_error_registers                   461     560     +99
      gen8_reset_engines                           945     942      -3
      g4x_do_reset                                 407     376     -31
      intel_gpu_reset                              545     509     -36
      clear_register                                63       -     -63
      Total: Before=1544400, After=1544366, chg -0.00%
      
      Win some, lose some, gcc is gcc.
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
      Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
      Reviewed-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190405202419.3093-1-chris@chris-wilson.co.uk
      95007efb