[Intel-gfx] [PATCH V5 0/5] drm/i915/gt: Initialize unused MOCS entries to L3_WB

[Siddiqui, Ayaz A]

Hi,
 I see a failure reported on IGT-CI for this series for SKL,

 igt at gem_ctx_isolation@preservation-s3 at rcs0:
shard-skl: PASS -> DMESG-WARN

Changes set in this series are applicable for gen12 onward platforms except TGL/RKL.

So above failure look like a false alarm to me.

Regards
-Ayaz

> -----Original Message-----
> From: Siddiqui, Ayaz A <ayaz.siddiqui at intel.com>
> Sent: Friday, September 3, 2021 2:52 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: Siddiqui, Ayaz A <ayaz.siddiqui at intel.com>
> Subject: [PATCH V5 0/5] drm/i915/gt: Initialize unused MOCS entries to
> L3_WB
> 
> Gen >= 12 onwards MOCS table doesn't have a setting for PTE so
> I915_MOCS_PTE is not a valid index and it will have different MOCS values
> are based on the platform.
> 
> To detect these kinds of misprogramming, all the unspecified and reserved
> MOCS indexes are set to WB_L3. TGL/RKL unspecified MOCS indexes are
> pointing to L3 UC are kept intact to avoid API break.
> 
> This series also contains patches to program BLIT_CCTL and CMD_CCTL
> registers to UC.
> Since we are quite late to update MOCS table for TGL so added a new MOCS
> table for ADL family.
> 
> V2:
>  1. Added CMD_CCTL to GUC regset list so that it can be restored
>     after engine reset.
>  2. Checkpatch warning removal.
> 
> V3:
>  1. Changed implementation to have a framework only.
>  2. Added register type for proper application.
>  3. moved CMD_CCTL programming to a separate patch.
>  4. Added L3CC initialization during gt reset so that MOCS indexes are
>     set before GuC initialization.
>  5. Removed Renderer check for L3CC verification in selftest.
> 
> V4:
>  1. Moved register programming in Workaorund section as fake workaround.
>  2. Removed seperate ADL mocs table, new logic is to set unused index as
>     L3_WB for gen12 platform except TGL/RKL.
> 
> V5:
>  1. Final version reviewed by Matt Roper  2. Removed "drm/i915/selftest:
> Remove Renderer class check for l3cc table read" form series,
>     this patch will be taken care of in different series.
> 
> Ayaz A Siddiqui (4):
>   drm/i915/gt: Add support of mocs propagation
>   drm/i915/gt: Set CMD_CCTL to UC for Gen12 Onward
>   drm/i915/gt: Set BLIT_CCTL reg to un-cached
>   drm/i915/gt: Initialize unused MOCS entries with device specific
>     values
> 
> Sreedhar Telukuntla (1):
>   drm/i915/gt: Initialize L3CC table in mocs init
> 
>  drivers/gpu/drm/i915/gt/intel_gt.c          |  2 +
>  drivers/gpu/drm/i915/gt/intel_gt_types.h    |  4 ++
>  drivers/gpu/drm/i915/gt/intel_mocs.c        | 72 ++++++++++++++-------
>  drivers/gpu/drm/i915/gt/intel_mocs.h        |  1 +
>  drivers/gpu/drm/i915/gt/intel_workarounds.c | 70
> +++++++++++++++++++-
>  drivers/gpu/drm/i915/i915_reg.h             | 26 ++++++++
>  6 files changed, 151 insertions(+), 24 deletions(-)
> 
> --
> 2.26.2