drm/i915: support 64K GTT pages for discrete cards

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discrete cards optimise 64K GTT pages for local-memory, since everything
should be allocated at 64K granularity. We say goodbye to sparse
entries, and instead get a compact 256B page-table for 64K pages,
which should be more cache friendly. 4K pages for local-memory
are no longer supported by the HW.

v4: don't return uninitialized err in igt_ppgtt_compact
Reported-by: kernel test robot <lkp@intel.com>

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Stuart Summers <stuart.summers@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220218184752.7524-8-ramalingam.c@intel.com

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This commit is contained in:

Matthew Auld 2022-02-19 00:17:44 +05:30 • committed by Lucas De Marchi

parent 87bd701ee2

commit 5189e3126e

4 changed files with 169 additions and 3 deletions

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60

drivers/gpu/drm/i915/gem/selftests/huge_pages.c

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108

drivers/gpu/drm/i915/gt/gen8_ppgtt.c

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3

drivers/gpu/drm/i915/gt/intel_gtt.h

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1

drivers/gpu/drm/i915/gt/intel_ppgtt.c

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