drm/xe: Do not forward invalid TLB invalidation seqnos to upper layers

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Certain TLB invalidation operations send multiple H2G messages per seqno
with only the final H2G containing the valid seqno - the others carry an
invalid seqno. The G2H handler drops these invalid seqno to aovid
prematurely signaling a TLB invalidation fence.

With TLB_INVALIDATION_SEQNO_INVALID used to indicate in progress
multi-step TLB invalidations, reset tdr to ensure that timeout
won't prematurely trigger when G2H actions are still ongoing.

v2: Remove lock from xe_tlb_inval_reset_timeout. (Matthew B)

v3: Squash with dependent patch from Matthew Brost' series.

Signed-off-by: Brian Nguyen <brian3.nguyen@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251212213225.3564537-13-brian3.nguyen@intel.com

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Matthew Brost 2025-12-13 05:32:27 +08:00

parent 825aed0328

commit 44ece22518

2 changed files with 21 additions and 0 deletions

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20

drivers/gpu/drm/xe/xe_tlb_inval.c

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1

drivers/gpu/drm/xe/xe_tlb_inval_types.h

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