drm/i915/ttm: mappable migration on fault

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The end goal is to have userspace tell the kernel what buffers will
require CPU access, however if we ever reach the CPU fault handler, and
the current resource is not mappable, then we should attempt to migrate
the buffer to the mappable portion of LMEM, or even system memory, if the
allowable placements permit it.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220228123607.580432-2-matthew.auld@intel.com

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Matthew Auld 2022-02-28 12:36:05 +00:00

parent 9373505967

commit 503725c2d9

1 changed files with 48 additions and 6 deletions

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drivers/gpu/drm/i915/gem/i915_gem_ttm.c

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