drm/i915/guc: Convert policies update to iosys_map

Use iosys_map to write the policies update so access to IO and system
memory is abstracted away.

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220216174147.3073235-8-lucas.demarchi@intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c

@@ -130,33 +130,37 @@ static u32 guc_ads_blob_size(struct intel_guc *guc)
 	       guc_ads_private_data_size(guc);
 }
 
-static void guc_policies_init(struct intel_guc *guc, struct guc_policies *policies)
+static void guc_policies_init(struct intel_guc *guc)
 {
 	struct intel_gt *gt = guc_to_gt(guc);
 	struct drm_i915_private *i915 = gt->i915;
+	u32 global_flags = 0;
 
-	policies->dpc_promote_time = GLOBAL_POLICY_DEFAULT_DPC_PROMOTE_TIME_US;
-	policies->max_num_work_items = GLOBAL_POLICY_MAX_NUM_WI;
+	ads_blob_write(guc, policies.dpc_promote_time,
+		       GLOBAL_POLICY_DEFAULT_DPC_PROMOTE_TIME_US);
+	ads_blob_write(guc, 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;
+		global_flags |= GLOBAL_POLICY_DISABLE_ENGINE_RESET;
 
-	policies->is_valid = 1;
+	ads_blob_write(guc, policies.global_flags, global_flags);
+	ads_blob_write(guc, policies.is_valid, 1);
 }
 
 void intel_guc_ads_print_policy_info(struct intel_guc *guc,
 				     struct drm_printer *dp)
 {
-	struct __guc_ads_blob *blob = guc->ads_blob;
-
-	if (unlikely(!blob))
+	if (unlikely(iosys_map_is_null(&guc->ads_map)))
 		return;
 
 	drm_printf(dp, "Global scheduling policies:\n");
-	drm_printf(dp, "  DPC promote time   = %u\n", blob->policies.dpc_promote_time);
-	drm_printf(dp, "  Max num work items = %u\n", blob->policies.max_num_work_items);
-	drm_printf(dp, "  Flags              = %u\n", blob->policies.global_flags);
+	drm_printf(dp, "  DPC promote time   = %u\n",
+		   ads_blob_read(guc, policies.dpc_promote_time));
+	drm_printf(dp, "  Max num work items = %u\n",
+		   ads_blob_read(guc, policies.max_num_work_items));
+	drm_printf(dp, "  Flags              = %u\n",
+		   ads_blob_read(guc, policies.global_flags));
 }
 
 static int guc_action_policies_update(struct intel_guc *guc, u32 policy_offset)
@@ -171,23 +175,24 @@ static int guc_action_policies_update(struct intel_guc *guc, u32 policy_offset)
 
 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);
+	u32 scheduler_policies;
 	intel_wakeref_t wakeref;
 	int ret;
 
-	if (!blob)
+	if (iosys_map_is_null(&guc->ads_map))
 		return -EOPNOTSUPP;
 
-	GEM_BUG_ON(!blob->ads.scheduler_policies);
+	scheduler_policies = ads_blob_read(guc, ads.scheduler_policies);
+	GEM_BUG_ON(!scheduler_policies);
 
-	guc_policies_init(guc, &blob->policies);
+	guc_policies_init(guc);
 
 	if (!intel_guc_is_ready(guc))
 		return 0;
 
 	with_intel_runtime_pm(&gt->i915->runtime_pm, wakeref)
-		ret = guc_action_policies_update(guc, blob->ads.scheduler_policies);
+		ret = guc_action_policies_update(guc, scheduler_policies);
 
 	return ret;
 }
@@ -593,7 +598,7 @@ static void __guc_ads_init(struct intel_guc *guc)
 	u32 base;
 
 	/* GuC scheduling policies */
-	guc_policies_init(guc, &blob->policies);
+	guc_policies_init(guc);
 
 	/* System info */
 	fill_engine_enable_masks(gt, &blob->system_info);