drm/xe: Add timeout to preempt fences

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To adhere to dma fencing rules that fences must signal within a
reasonable amount of time, add a 5 second timeout to preempt fences. If
this timeout occurs, kill the associated VM as this fatal to the VM.

v2:
 - Add comment for smp_wmb (Checkpatch)
 - Fix kernel doc typo (Inspection)
 - Add comment for killed check (Niranjana)
v3:
 - Drop smp_wmb (Matthew Auld)
 - Don't take vm->lock in preempt fence worker (Matthew Auld)
 - Drop RB given changes to patch
v4:
 - Add WRITE/READ_ONCE (Niranjana)
 - Don't export xe_vm_kill (Niranjana)

Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Tested-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240626004137.4060806-1-matthew.brost@intel.com

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This commit is contained in:

Matthew Brost 2024-06-25 17:41:37 -07:00

parent 7c0389c615

commit 627c961d67

5 changed files with 59 additions and 13 deletions

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6

drivers/gpu/drm/xe/xe_exec_queue_types.h

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3

drivers/gpu/drm/xe/xe_execlist.c

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39

drivers/gpu/drm/xe/xe_guc_submit.c

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12

drivers/gpu/drm/xe/xe_preempt_fence.c

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12

drivers/gpu/drm/xe/xe_vm.c

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