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drm/i915/icl: Default to Thread Group preemption for compute workloads 

We assumed that the default preemption granularity is fine for ICL.
Unfortunately, it turns out that some drivers don't support mid-thread
preemption for compute workloads.
If a workload that doesn't support mid-thread preemption gets mid-thread
preempted, we're going to observe a GPU hang.
While I'm here, let's also update the "workaround" naming.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Anuj Phogat <anuj.phogat@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Rafael Antognolli <rafael.antognolli@intel.com>
Tested-by: Anuj Phogat <anuj.phogat@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Rafael Antognolli <rafael.antognolli@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190305124827.23446-1-michal.winiarski@intel.com
This commit is contained in:
Michał Winiarski 2019-03-05 13:48:26 +01:00 committed by Chris Wilson
parent cf4331dd39
commit d846325ad0
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/i915/intel_workarounds.c
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@ -555,6 +555,11 @@ static void icl_ctx_workarounds_init(struct intel_engine_cs *engine)
GEN10_CACHE_MODE_SS,
0, /* write-only, so skip validation */
_MASKED_BIT_ENABLE(FLOAT_BLEND_OPTIMIZATION_ENABLE));
/* WaDisableGPGPUMidThreadPreemption:icl */
WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1,
GEN9_PREEMPT_GPGPU_LEVEL_MASK,
GEN9_PREEMPT_GPGPU_THREAD_GROUP_LEVEL);
}
void intel_engine_init_ctx_wa(struct intel_engine_cs *engine)
@ -1162,8 +1167,8 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
GEN7_DISABLE_SAMPLER_PREFETCH);
}
if (IS_GEN(i915, 9) || IS_CANNONLAKE(i915)) {
/* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl,cnl */
if (IS_GEN_RANGE(i915, 9, 11)) {
/* FtrPerCtxtPreemptionGranularityControl:skl,bxt,kbl,cfl,cnl,icl */
wa_masked_en(wal,
GEN7_FF_SLICE_CS_CHICKEN1,
GEN9_FFSC_PERCTX_PREEMPT_CTRL);