Quoting Jackie Li (2018-03-14 02:32:50) > Hardware may have specific restrictions on GuC WOPCM offset and size. On > Gen9, the value of the GuC WOPCM size register needs to be larger than the > value of GuC WOPCM offset register + a Gen9 specific offset (144KB) for > reserved GuC WOPCM. Fail to enforce such a restriction on GuC WOPCM size > will lead to GuC firmware execution failures. On the other hand, with > current static GuC WOPCM offset and size values (512KB for both offset and > size), the GuC WOPCM size verification will fail on Gen9 even if it can be > fixed by lowering the GuC WOPCM offset by calculating its value based on > HuC firmware size (which is likely less than 200KB on Gen9), so that we can > have a GuC WOPCM size value which is large enough to pass the GuC WOPCM > size check. > > This patch updates the reserved GuC WOPCM size for RC6 context on Gen9 to > 24KB to strictly align with the Gen9 GuC WOPCM layout. It also adds support > to verify the GuC WOPCM size aganist the Gen9 hardware restrictions. To > meet all above requirements, let's provide dynamic partitioning of the > WOPCM that will be based on platform specific HuC/GuC firmware sizes. > > v2: > - Removed intel_wopcm_init (Ville/Sagar/Joonas) > - Renamed and Moved the intel_wopcm_partition into intel_guc (Sagar) > - Removed unnecessary function calls (Joonas) > - Init GuC WOPCM partition as soon as firmware fetching is completed > > v3: > - Fixed indentation issues (Chris) > - Removed layering violation code (Chris/Michal) > - Created separat files for GuC wopcm code (Michal) > - Used inline function to avoid code duplication (Michal) > > v4: > - Preset the GuC WOPCM top during early GuC init (Chris) > - Fail intel_uc_init_hw() as soon as GuC WOPCM partitioning failed > > v5: > - Moved GuC DMA WOPCM register updating code into intel_wopcm.c > - Took care of the locking status before writing to GuC DMA > Write-Once registers. (Joonas) > > v6: > - Made sure the GuC WOPCM size to be multiple of 4K (4K aligned) > > v8: > - Updated comments and fixed naming issues (Sagar/Joonas) > - Updated commit message to include more description about the hardware > restriction on GuC WOPCM size (Sagar) > > v9: > - Minor changes variable names and code comments (Sagar) > - Added detailed GuC WOPCM layout drawing (Sagar/Michal) > - Refined macro definitions to be reader friendly (Michal) > - Removed redundent check to valid flag (Michal) > - Unified first parameter for exported GuC WOPCM functions (Michal) > - Refined the name and parameter list of hardware restriction checking > functions (Michal) > > v10: > - Used shorter function name for internal functions (Joonas) > - Moved init-ealry function into c file (Joonas) > - Consolidated and removed redundant size checks (Joonas/Michal) > - Removed unnecessary unlikely() from code which is only called once > during boot (Joonas) > - More fixes to kernel-doc format and content (Michal) > - Avoided the use of PAGE_MASK for 4K pages (Michal) > - Added error log messages to error paths (Michal) > > v11: > - Replaced intel_guc_wopcm with more generic intel_wopcm and attached > intel_wopcm to drm_i915_private instead intel_guc (Michal) > - dynamic calculation of GuC non-wopcm memory start (a.k.a WOPCM Top > offset from GuC WOPCM base) (Michal) > - Moved WOPCM marco definitions into .c source file (Michal) > - Exported WOPCM layout diagram as kernel-doc (Michal) > > v12: > - Updated naming, function kernel-doc to align with new changes (Michal) > > v13: > - Updated the ordering of s-o-b/cc/r-b tags (Sagar) > - Corrected one tense error in comment (Sagar) > - Corrected typos and removed spurious comments (Joonas) > > Bspec: 12690 > > Signed-off-by: Jackie Li <yaodong.li@xxxxxxxxx> > Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx> > Cc: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx> > Cc: Sujaritha Sundaresan <sujaritha.sundaresan@xxxxxxxxx> > Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx> > Cc: John Spotswood <john.a.spotswood@xxxxxxxxx> > Cc: Oscar Mateo <oscar.mateo@xxxxxxxxx> > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> > Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx> (v8) > Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> (v9) > Reviewed-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx> (v11) > Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> (v12) Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> Regards, Joonas _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
