[Intel-gfx] [PATCH v5 00/32] PPGTT dynamic page allocations and 48b addressing

[Michel Thierry]

This patchset starts addressing comments from v4 by Mika, and also has been
rebased on top of nightly.

For GEN8, it has also been extended to work in logical ring submission (lrc)
mode, as it will be the preferred mode of operation.
I also tried to update the lrc code at the same time the ppgtt refactoring
occurred, leaving only one patch that is exclusively for lrc.

I'm also now including the required patches for PPGTT with 48b addressing.
In order expand the GPU address space, a 4th level translation is added, the
Page Map Level 4 (PML4). This PML4 has 256 PML4 Entries (PML4E), PML4[0-255],
each pointing to a PDP.

For now, this feature will only be available in BDW, in LRC submission mode
(execlists) and when i915.enable_ppgtt=3 is set.
Also note that this expanded address space is only available for full PPGTT,
aliasing PPGTT remains 32b.

This list can be seen in 3 parts:
[01-10] Add page table allocation for GEN6/GEN7
[11-20] Enable dynamic allocation in GEN8,for both legacy and
execlist submission modes.
[21-32] PML4 support in BDW.

Ben Widawsky (26):
  drm/i915: page table abstractions
  drm/i915: Complete page table structures
  drm/i915: Create page table allocators
  drm/i915: Track GEN6 page table usage
  drm/i915: Extract context switch skip and pd load logic
  drm/i915: Track page table reload need
  drm/i915: Initialize all contexts
  drm/i915: Finish gen6/7 dynamic page table allocation
  drm/i915/bdw: Use dynamic allocation idioms on free
  drm/i915/bdw: page directories rework allocation
  drm/i915/bdw: pagetable allocation rework
  drm/i915/bdw: Update pdp switch and point unused PDPs to scratch page
  drm/i915: num_pd_pages/num_pd_entries isn't useful
  drm/i915: Extract PPGTT param from page_directory alloc
  drm/i915/bdw: Split out mappings
  drm/i915/bdw: begin bitmap tracking
  drm/i915/bdw: Dynamic page table allocations
  drm/i915/bdw: Make pdp allocation more dynamic
  drm/i915/bdw: Abstract PDP usage
  drm/i915/bdw: Add dynamic page trace events
  drm/i915/bdw: Add ppgtt info for dynamic pages
  drm/i915/bdw: implement alloc/free for 4lvl
  drm/i915/bdw: Add 4 level switching infrastructure
  drm/i915/bdw: Generalize PTE writing for GEN8 PPGTT
  drm/i915: Plumb sg_iter through va allocation ->maps
  drm/i915: Expand error state's address width to 64b

Michel Thierry (6):
  drm/i915: Plumb drm_device through page tables operations
  drm/i915: Add dynamic page trace events
  drm/i915/bdw: Support dynamic pdp updates in lrc mode
  drm/i915/bdw: Support 64 bit PPGTT in lrc mode
  drm/i915/bdw: Add 4 level support in insert_entries and clear_range
  drm/i915/bdw: Flip the 48b switch

 drivers/gpu/drm/i915/i915_debugfs.c        |   26 +-
 drivers/gpu/drm/i915/i915_drv.h            |   11 +-
 drivers/gpu/drm/i915/i915_gem.c            |   11 +
 drivers/gpu/drm/i915/i915_gem_context.c    |   64 +-
 drivers/gpu/drm/i915/i915_gem_execbuffer.c |   11 +
 drivers/gpu/drm/i915/i915_gem_gtt.c        | 1534 ++++++++++++++++++++++------
 drivers/gpu/drm/i915/i915_gem_gtt.h        |  248 ++++-
 drivers/gpu/drm/i915/i915_gpu_error.c      |   17 +-
 drivers/gpu/drm/i915/i915_params.c         |    2 +-
 drivers/gpu/drm/i915/i915_reg.h            |    1 +
 drivers/gpu/drm/i915/i915_trace.h          |  111 ++
 drivers/gpu/drm/i915/intel_lrc.c           |  149 ++-
 12 files changed, 1786 insertions(+), 399 deletions(-)

-- 
2.1.1