drm/xe: Enable CPU binds for jobs

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No reason to use the GPU for binds.

Benefits of CPU-based binds:
- Lower latency once dependencies are resolved, as there is no
  interaction with the GuC or a hardware context switch both of which
  are relatively slow.
- Large arrays of binds do not risk running out of migration PTEs,
  avoiding -ENOBUFS being returned to userspace.
- Kernel binds are decoupled from the migration exec queue (which issues
  copies and clears), so they cannot get stuck behind unrelated
  jobs—this can be a problem with parallel GPU faults.
- Paves the for path decouping binds from tiles and individual engines
- Enables ULLS on the migration exec queue, as this queue has exclusive
  access to the paging copy engine.

Update migration layer to formulate a PT job which will issue CPU bind
in the submission backend.

All code related to GPU-based binding has been removed.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Maarten Lankhorst <dev@lankhorst.se>
Link: https://patch.msgid.link/20260925201526.1355279-14-matthew.brost@intel.com

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This commit is contained in:

Matthew Brost 2026-09-25 13:15:15 -07:00

parent c193fa57f2

commit 48eb42245f

3 changed files with 17 additions and 235 deletions

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2

drivers/gpu/drm/xe/xe_bo_types.h

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249

drivers/gpu/drm/xe/xe_migrate.c

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1

drivers/gpu/drm/xe/xe_pt.c

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