[Intel-gfx] [PATCH 00/13] gen8 ppgtt dynamic page allocations

[Mika Kuoppala]

Michel Thierry <michel.thierry at intel.com> writes:

> These are the last remining patches to enable dynamic allocation in gen8+.
> All credit to Ben's original design and Mika's extensive reviews.
>
> During stress testing, the light restore context corruption problem was
> observed in some systems (resubmission with HEAD==TAIL). The workaround to
> prevent to prevent this known problem should be in place as we also update
> the PDPx registers before the context is send to execution.
>
> The last patch is only of interest in systems with less than 4GB of memory.
> Now that the PPGTT table overhead is not that big, we can use the full virtual
> space address range in these systems.
>
> Michel Thierry (13):
>   drm/i915: Remove _entry from PPGTT page structures
>   drm/i915: Remove unnecessary gen8_ppgtt_unmap_pages
>   drm/i915/gen8: Initialize page tables
>   drm/i915/gen8: Add dynamic allocation macros and helper functions
>   drm/i915/gen8: page directories rework allocation
>   drm/i915/gen8: pagetable allocation rework
>   drm/i915/gen8: 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/gen8: Split out mappings
>   drm/i915/gen8: begin bitmap tracking
>   drm/i915/gen8: Dynamic page table allocations
>   drm/i915: Use complete address space in true PPGTT
>

Patches 1-13,
Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>

>  drivers/gpu/drm/i915/i915_debugfs.c |   2 -
>  drivers/gpu/drm/i915/i915_gem_gtt.c | 620 +++++++++++++++++++++++-------------
>  drivers/gpu/drm/i915/i915_gem_gtt.h |  82 ++++-
>  drivers/gpu/drm/i915/i915_trace.h   |   4 +-
>  drivers/gpu/drm/i915/intel_lrc.c    |  40 ++-
>  5 files changed, 504 insertions(+), 244 deletions(-)
>
> -- 
> 2.1.1