[Intel-gfx] [PATCH v8 0/3] Apply Wa_16018031267 / Wa_16018063123

[Jonathan Cavitt]

Apply Wa_16018031267 / Wa_16018063123.  This necessitates submitting a
fastcolor blit as WABB and setting the copy engine arbitration to
round-robin mode.

v2:
- Rename old platform check in second patch to match
  declaration in first patch.
- Refactor second patch name to match first patch.

v3:
- Move NEEDS_FASTCOLOR_BLT_WABB to intel_gt.h.
- Refactor NEEDS_FASTCOLOR_BLT_WABB to make it more
  streamlined to use.
- Stop dividing PAGE_SIZE by sizeof(u32) when computing
  ctx_bb_ggtt_addr for lrc_setup_bb_per_ctx.
- Reduce comment complexity.
- Fix several checkpatch warnings.

v4:
- Actually stop dividing PAGE_SIZE by sizeof(u32) when
  computing ctx_bb_ggtt_addr for lrc_setup_bb_per_ctx.

v5:
- Stop dividing PAGE_SIZE by sizeof(u32) in
  check_ring_start during lrc live selftest.

v6:
- Append MI_BATCH_BUFFER_END to end of all PER_CTX_BB
  command streams.
- No longer skip on empty, as command stream will never
  be empty (always contains at least MI_BATCH_BUFFER_END).
- No longer append MI_NOOP until cachline aligned (was a
  fragment from INDIRECT_CTX setup).

v7:
- Use 0x6b instead of 0 for color to maintain functionality.

v8:
- Revert v7.
- Add some reserved kernel space per vm to run the
  workaround on.

Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
Signed-off-by: Jonathan Cavitt <jonathan.cavitt at intel.com>
CC: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
CC: Rodrigo Vivi <rodrigo.vivi at intel.com>
CC: Tomasz Mistat <tomasz.mistat at intel.com>
CC: Gregory F Germano <gregory.f.germano at intel.com>
CC: Matt Roper <matthew.d.roper at intel.com>
CC: James Ausmus <james.ausmus at intel.com>
CC: Chris Wilson <chris.p.wilson at linux.intel.com>
CC: Andi Shyti <andi.shyti at intel.com>

Jonathan Cavitt (3):
  drm/i915: Reserve some kernel space per vm
  drm/i915: Add WABB blit for Wa_16018031267 / Wa_16018063123
  drm/i915: Set copy engine arbitration for Wa_16018031267 /
    Wa_16018063123

 drivers/gpu/drm/i915/gt/gen8_ppgtt.c        |   7 ++
 drivers/gpu/drm/i915/gt/intel_engine_regs.h |   6 ++
 drivers/gpu/drm/i915/gt/intel_gt.h          |   4 +
 drivers/gpu/drm/i915/gt/intel_gt_types.h    |   2 +
 drivers/gpu/drm/i915/gt/intel_gtt.h         |   1 +
 drivers/gpu/drm/i915/gt/intel_lrc.c         | 101 +++++++++++++++++++-
 drivers/gpu/drm/i915/gt/intel_workarounds.c |   5 +
 drivers/gpu/drm/i915/gt/selftest_lrc.c      |  65 +++++++++----
 8 files changed, 170 insertions(+), 21 deletions(-)

-- 
2.25.1