drm/xe/guc/tlb: Flush g2h worker in case of tlb timeout

Flush the g2h worker explicitly if TLB timeout happens which is
observed on LNL and that points to the recent scheduling issue with
E-cores on LNL.

This is similar to the recent fix:
commit e51527233804 ("drm/xe/guc/ct: Flush g2h worker in case of g2h
response timeout") and should be removed once there is E core
scheduling fix.

v2: Add platform check(Himal)
v3: Remove gfx platform check as the issue related to cpu
    platform(John)
    Use the common WA macro(John) and print when the flush
    resolves timeout(Matt B)
v4: Remove the resolves log and do the flush before taking
    pending_lock(Matt A)

Cc: Badal Nilawar <badal.nilawar@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: stable@vger.kernel.org # v6.11+
Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2687
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241029120117.449694-3-nirmoy.das@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit e1f6fa55664a0eeb0a641f497e1adfcf6672e995)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
index bbb9e411d21f64522698a3fc573d1862f45acabe..9d82ea30f4df23dcfddcfdd2c7bdd8be31f84581 100644 (file)
--- a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
+++ b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
@@ -72,6 +72,8 @@ static void xe_gt_tlb_fence_timeout(struct work_struct *work)
        struct xe_device *xe = gt_to_xe(gt);
        struct xe_gt_tlb_invalidation_fence *fence, *next;
 
+       LNL_FLUSH_WORK(&gt->uc.guc.ct.g2h_worker);
+
        spin_lock_irq(&gt->tlb_invalidation.pending_lock);
        list_for_each_entry_safe(fence, next,
                                 &gt->tlb_invalidation.pending_fences, link) {