On Thu, Jan 12, 2023 at 10:19:47PM -0300, Gustavo Sousa wrote: > That register doesn't belong to a specific engine, so the proper > placement for workarounds programming it should be > general_render_compute_wa_init().
Looking to the surrounds it seems like we have more registers that are not per engine specific being touched there. So, a few questions came to my mind: - do we need to a bigger clean up and move other cases as well? - do we need to review one by one and see if the bug is really for all the engines or affect one specific engine hence the function was initially placed here? - do we have any clean documentation on how to split things around and when or where to place things here or there? > > Signed-off-by: Gustavo Sousa <[email protected]> > --- > drivers/gpu/drm/i915/gt/intel_workarounds.c | 65 ++++++++++++--------- > 1 file changed, 36 insertions(+), 29 deletions(-) > > diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c > b/drivers/gpu/drm/i915/gt/intel_workarounds.c > index 6dacd0dc5c2c..bd40b8c93d24 100644 > --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c > +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c > @@ -2325,10 +2325,6 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, > struct i915_wa_list *wal) > /* Wa_1509727124 */ > wa_mcr_masked_en(wal, GEN10_SAMPLER_MODE, > SC_DISABLE_POWER_OPTIMIZATION_EBB); > - > - /* Wa_22013037850 */ > - wa_mcr_write_or(wal, LSC_CHICKEN_BIT_0_UDW, > - DISABLE_128B_EVICTION_COMMAND_UDW); > } > > if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_B0, STEP_FOREVER) || > @@ -2357,21 +2353,6 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, > struct i915_wa_list *wal) > GEN12_DISABLE_HDR_PAST_PAYLOAD_HOLD_FIX); > } > > - if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_B0, STEP_C0) || > - IS_DG2_G11(i915)) { > - /* > - * Wa_22012826095:dg2 > - * Wa_22013059131:dg2 > - */ > - wa_mcr_write_clr_set(wal, LSC_CHICKEN_BIT_0_UDW, > - MAXREQS_PER_BANK, > - REG_FIELD_PREP(MAXREQS_PER_BANK, 2)); > - > - /* Wa_22013059131:dg2 */ > - wa_mcr_write_or(wal, LSC_CHICKEN_BIT_0, > - FORCE_1_SUB_MESSAGE_PER_FRAGMENT); > - } > - > /* Wa_1308578152:dg2_g10 when first gslice is fused off */ > if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_B0, STEP_C0) && > needs_wa_1308578152(engine)) { > @@ -2396,16 +2377,6 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, > struct i915_wa_list *wal) > */ > wa_mcr_masked_en(wal, GEN8_ROW_CHICKEN, > MDQ_ARBITRATION_MODE | UGM_BACKUP_MODE); > - > - /* > - * Wa_14010918519:dg2_g10 > - * > - * LSC_CHICKEN_BIT_0 always reads back as 0 is this stepping, > - * so ignoring verification. > - */ > - wa_mcr_add(wal, LSC_CHICKEN_BIT_0_UDW, 0, > - FORCE_SLM_FENCE_SCOPE_TO_TILE | > FORCE_UGM_FENCE_SCOPE_TO_TILE, > - 0, false); > } > > if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_A0, STEP_B0)) { > @@ -2990,6 +2961,15 @@ general_render_compute_wa_init(struct intel_engine_cs > *engine, struct i915_wa_li > > add_render_compute_tuning_settings(i915, wal); > > + if (IS_MTL_GRAPHICS_STEP(i915, M, STEP_A0, STEP_B0) || > + IS_MTL_GRAPHICS_STEP(i915, P, STEP_A0, STEP_B0) || > + IS_DG2_GRAPHICS_STEP(i915, G10, STEP_B0, STEP_FOREVER) || > + IS_DG2_G11(i915) || IS_DG2_G12(i915)) { > + /* Wa_22013037850 */ > + wa_mcr_write_or(wal, LSC_CHICKEN_BIT_0_UDW, > + DISABLE_128B_EVICTION_COMMAND_UDW); > + } > + > if (IS_MTL_GRAPHICS_STEP(i915, M, STEP_A0, STEP_B0) || > IS_MTL_GRAPHICS_STEP(i915, P, STEP_A0, STEP_B0) || > IS_PONTEVECCHIO(i915) || > @@ -3011,6 +2991,33 @@ general_render_compute_wa_init(struct intel_engine_cs > *engine, struct i915_wa_li > wa_masked_en(wal, VFG_PREEMPTION_CHICKEN, > POLYGON_TRIFAN_LINELOOP_DISABLE); > } > > + if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_B0, STEP_C0) || > + IS_DG2_G11(i915)) { > + /* > + * Wa_22012826095:dg2 > + * Wa_22013059131:dg2 > + */ > + wa_mcr_write_clr_set(wal, LSC_CHICKEN_BIT_0_UDW, > + MAXREQS_PER_BANK, > + REG_FIELD_PREP(MAXREQS_PER_BANK, 2)); > + > + /* Wa_22013059131:dg2 */ > + wa_mcr_write_or(wal, LSC_CHICKEN_BIT_0, > + FORCE_1_SUB_MESSAGE_PER_FRAGMENT); > + } > + > + if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_A0, STEP_B0)) { > + /* > + * Wa_14010918519:dg2_g10 > + * > + * LSC_CHICKEN_BIT_0 always reads back as 0 is this stepping, > + * so ignoring verification. > + */ > + wa_mcr_add(wal, LSC_CHICKEN_BIT_0_UDW, 0, > + FORCE_SLM_FENCE_SCOPE_TO_TILE | > FORCE_UGM_FENCE_SCOPE_TO_TILE, > + 0, false); > + } > + > if (IS_PONTEVECCHIO(i915)) { > /* Wa_16016694945 */ > wa_masked_en(wal, XEHPC_LNCFMISCCFGREG0, XEHPC_OVRLSCCC); > -- > 2.39.0 >
