drm/xe: Invalidate TLB after unbind is complete

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This gets tricky as we can't do the TLB invalidation until the unbind
operation is done on the hardware and we can't signal the unbind as
complete until the TLB invalidation is done. To work around this we
create an unbind fence which does a TLB invalidation after unbind is
done on the hardware, signals on TLB invalidation completion, and this
fence is installed in the BO dma-resv slot and installed in out-syncs
for the unbind operation.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Suggested-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com
Suggested-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Matthew Brost 2023-01-18 14:43:56 -08:00 • committed by Rodrigo Vivi

parent fc108a8b75

commit f4a8add94f

3 changed files with 107 additions and 0 deletions

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2

drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c

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9

drivers/gpu/drm/xe/xe_gt_types.h

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96

drivers/gpu/drm/xe/xe_pt.c

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