drm/i915/gem: Calculate object page offset for partial memory mapping

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To enable partial memory mapping of GPU virtual memory, it's
necessary to introduce an offset to the object's memory
(obj->mm.pages) scatterlist. This adjustment compensates for
instances when userspace mappings do not start from the beginning
of the object.

Based on a patch by Chris Wilson.

Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Chris Wilson <chris.p.wilson@linux.intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240807100521.478266-3-andi.shyti@linux.intel.com

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This commit is contained in:

Andi Shyti 2024-08-07 11:05:21 +01:00

parent 609d8b1c42

commit 255fc1703e

3 changed files with 16 additions and 3 deletions

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4

drivers/gpu/drm/i915/gem/i915_gem_mman.c

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12

drivers/gpu/drm/i915/i915_mm.c

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3

drivers/gpu/drm/i915/i915_mm.h

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