[PATCH v5 3/3] drm/xe/guc/tlb: Flush g2h worker in case of tlb timeout

[Matthew Auld]

On 29/10/2024 12:01, Nirmoy Das wrote:
> 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 at intel.com>
> Cc: Matthew Brost <matthew.brost at intel.com>
> Cc: Matthew Auld <matthew.auld at intel.com>
> Cc: John Harrison <John.C.Harrison at Intel.com>
> Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
> Cc: Lucas De Marchi <lucas.demarchi at intel.com>
> Cc: <stable at vger.kernel.org> # v6.11+
> Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2687
> Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
Reviewed-by: Matthew Auld <matthew.auld at intel.com>