From: John Harrison John.C.Harrison@Intel.com
Use the official driver default scheduling policies for configuring the GuC scheduler rather than a bunch of hardcoded values.
v2: (Matthew Brost) - Move I915_ENGINE_WANT_FORCED_PREEMPTION to later patch
Signed-off-by: John Harrison John.C.Harrison@Intel.com Signed-off-by: Matthew Brost matthew.brost@intel.com Reviewed-by: Matthew Brost matthew.brost@intel.com Cc: Jose Souza jose.souza@intel.com --- drivers/gpu/drm/i915/gt/uc/intel_guc.h | 2 + drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 44 ++++++++++++++++++- .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 8 ++-- 3 files changed, 49 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h index f355a70bbec4..8c8cf842c29a 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h @@ -277,6 +277,8 @@ int intel_guc_engine_failure_process_msg(struct intel_guc *guc,
void intel_guc_find_hung_context(struct intel_engine_cs *engine);
+int intel_guc_global_policies_update(struct intel_guc *guc); + void intel_guc_submission_reset_prepare(struct intel_guc *guc); void intel_guc_submission_reset(struct intel_guc *guc, bool stalled); void intel_guc_submission_reset_finish(struct intel_guc *guc); diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c index 97cfaaaf2397..60b73625f686 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c @@ -77,14 +77,54 @@ static u32 guc_ads_blob_size(struct intel_guc *guc) guc_ads_private_data_size(guc); }
-static void guc_policies_init(struct guc_policies *policies) +static void guc_policies_init(struct intel_guc *guc, struct guc_policies *policies) { + struct intel_gt *gt = guc_to_gt(guc); + struct drm_i915_private *i915 = gt->i915; + policies->dpc_promote_time = GLOBAL_POLICY_DEFAULT_DPC_PROMOTE_TIME_US; policies->max_num_work_items = GLOBAL_POLICY_MAX_NUM_WI; + policies->global_flags = 0; + if (i915->params.reset < 2) + policies->global_flags |= GLOBAL_POLICY_DISABLE_ENGINE_RESET; + policies->is_valid = 1; }
+static int guc_action_policies_update(struct intel_guc *guc, u32 policy_offset) +{ + u32 action[] = { + INTEL_GUC_ACTION_GLOBAL_SCHED_POLICY_CHANGE, + policy_offset + }; + + return intel_guc_send(guc, action, ARRAY_SIZE(action)); +} + +int intel_guc_global_policies_update(struct intel_guc *guc) +{ + struct __guc_ads_blob *blob = guc->ads_blob; + struct intel_gt *gt = guc_to_gt(guc); + intel_wakeref_t wakeref; + int ret; + + if (!blob) + return -EOPNOTSUPP; + + GEM_BUG_ON(!blob->ads.scheduler_policies); + + guc_policies_init(guc, &blob->policies); + + if (!intel_guc_is_ready(guc)) + return 0; + + with_intel_runtime_pm(>->i915->runtime_pm, wakeref) + ret = guc_action_policies_update(guc, blob->ads.scheduler_policies); + + return ret; +} + static void guc_mapping_table_init(struct intel_gt *gt, struct guc_gt_system_info *system_info) { @@ -281,7 +321,7 @@ static void __guc_ads_init(struct intel_guc *guc) u8 engine_class, guc_class;
/* GuC scheduling policies */ - guc_policies_init(&blob->policies); + guc_policies_init(guc, &blob->policies);
/* * GuC expects a per-engine-class context image and size diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index 76c2d927e1c3..cea3e3073a71 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -874,6 +874,7 @@ void intel_guc_submission_reset_finish(struct intel_guc *guc) GEM_WARN_ON(atomic_read(&guc->outstanding_submission_g2h)); atomic_set(&guc->outstanding_submission_g2h, 0);
+ intel_guc_global_policies_update(guc); enable_submission(guc); intel_gt_unpark_heartbeats(guc_to_gt(guc)); } @@ -1170,8 +1171,9 @@ static void guc_context_policy_init(struct intel_engine_cs *engine, { desc->policy_flags = 0;
- desc->execution_quantum = CONTEXT_POLICY_DEFAULT_EXECUTION_QUANTUM_US; - desc->preemption_timeout = CONTEXT_POLICY_DEFAULT_PREEMPTION_TIME_US; + /* NB: For both of these, zero means disabled. */ + desc->execution_quantum = engine->props.timeslice_duration_ms * 1000; + desc->preemption_timeout = engine->props.preempt_timeout_ms * 1000; }
static int guc_lrc_desc_pin(struct intel_context *ce, bool loop) @@ -1942,13 +1944,13 @@ static void guc_default_vfuncs(struct intel_engine_cs *engine) engine->set_default_submission = guc_set_default_submission;
engine->flags |= I915_ENGINE_HAS_PREEMPTION; + engine->flags |= I915_ENGINE_HAS_TIMESLICES;
/* * TODO: GuC supports timeslicing and semaphores as well, but they're * handled by the firmware so some minor tweaks are required before * enabling. * - * engine->flags |= I915_ENGINE_HAS_TIMESLICES; * engine->flags |= I915_ENGINE_HAS_SEMAPHORES; */