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drm/i915/gtt: reduce overzealous alignment constraints for GGTT

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Currently this will enforce both 2M alignment and padding for any LMEM
pages inserted into the GGTT. However, this was only meant to be applied
to the compact-pt layout with the ppGTT. For the GGTT we can reduce the
alignment and padding to 64K.

Bspec: 45015
Fixes: 87bd701ee2 ("drm/i915: enforce min GTT alignment for discrete cards")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Robert Beckett <bob.beckett@collabora.com>
Cc: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220303100229.839282-1-matthew.auld@intel.com
(cherry picked from commit c64fa77dd4)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Matthew Auld 2022-03-03 10:02:29 +00:00 committed by Joonas Lahtinen
parent 4546281e8a
commit 5e7f44b5c2
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/gt/intel_gtt.c
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@ -234,7 +234,8 @@ void i915_address_space_init(struct i915_address_space *vm, int subclass)
memset64(vm->min_alignment, I915_GTT_MIN_ALIGNMENT,
ARRAY_SIZE(vm->min_alignment));
if (HAS_64K_PAGES(vm->i915) && NEEDS_COMPACT_PT(vm->i915)) {
if (HAS_64K_PAGES(vm->i915) && NEEDS_COMPACT_PT(vm->i915) &&
subclass == VM_CLASS_PPGTT) {
vm->min_alignment[INTEL_MEMORY_LOCAL] = I915_GTT_PAGE_SIZE_2M;
vm->min_alignment[INTEL_MEMORY_STOLEN_LOCAL] = I915_GTT_PAGE_SIZE_2M;
} else if (HAS_64K_PAGES(vm->i915)) {