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drm/xe/vf: Flush and stop CTs in VF post migration recovery

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Flushing CTs (i.e., progressing all pending G2H messages) gives VF
post-migration recovery an accurate view of which H2G messages the GuC
has processed, enabling the GuC submission state machine to correctly
rebuild all state.

Also, stop all CT traffic, as the CT is not live during VF
post-migration recovery.

v3:
 - xe_guc_ct_flush_and_stop rename (Michal)
 - Drop extra GuC CT WQ wake up (Michal)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://lore.kernel.org/r/20251008214532.3442967-21-matthew.brost@intel.com
This commit is contained in:
Matthew Brost
2025-10-08 14:45:18 -07:00
parent 1f135a1ee9
commit 3061e8e0dd
3 changed files with 12 additions and 0 deletions
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1
drivers/gpu/drm/xe/xe_gt_sriov_vf.c
View File

@@ -1105,6 +1105,7 @@ static void vf_post_migration_shutdown(struct xe_gt *gt)
gt->sriov.vf.migration.recovery_queued = false;
spin_unlock_irq(&gt->sriov.vf.migration.lock);
xe_guc_ct_flush_and_stop(&gt->uc.guc.ct);
xe_guc_submit_pause(&gt->uc.guc);
}

10
drivers/gpu/drm/xe/xe_guc_ct.c
View File

@@ -574,6 +574,16 @@ void xe_guc_ct_disable(struct xe_guc_ct *ct)
stop_g2h_handler(ct);
}
/**
* xe_guc_ct_flush_and_stop - Flush and stop all processing of G2H / H2G
* @ct: the &xe_guc_ct
*/
void xe_guc_ct_flush_and_stop(struct xe_guc_ct *ct)
{
receive_g2h(ct);
xe_guc_ct_stop(ct);
}
/**
* xe_guc_ct_stop - Set GuC to stopped state
* @ct: the &xe_guc_ct

1
drivers/gpu/drm/xe/xe_guc_ct.h
View File

@@ -17,6 +17,7 @@ int xe_guc_ct_init_post_hwconfig(struct xe_guc_ct *ct);
int xe_guc_ct_enable(struct xe_guc_ct *ct);
void xe_guc_ct_disable(struct xe_guc_ct *ct);
void xe_guc_ct_stop(struct xe_guc_ct *ct);
void xe_guc_ct_flush_and_stop(struct xe_guc_ct *ct);
void xe_guc_ct_fast_path(struct xe_guc_ct *ct);
struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_capture(struct xe_guc_ct *ct);