drm/i915/guc: Convert guc_mmio_reg_state_init to iosys_map

Now that the regset list is prepared, convert guc_mmio_reg_state_init()
to use iosys_map to copy the array to the final location and
initialize additional fields in ads.reg_state_list.

v2: Just use an offset instead of temporary iosys_map.

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: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220216174147.3073235-15-lucas.demarchi@intel.com

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

@@ -383,40 +383,44 @@ static long guc_mmio_reg_state_create(struct intel_guc *guc)
 	return ret;
 }
 
-static void guc_mmio_reg_state_init(struct intel_guc *guc,
-				    struct __guc_ads_blob *blob)
+static void guc_mmio_reg_state_init(struct intel_guc *guc)
 {
 	struct intel_gt *gt = guc_to_gt(guc);
 	struct intel_engine_cs *engine;
-	struct guc_mmio_reg *ads_registers;
 	enum intel_engine_id id;
 	u32 addr_ggtt, offset;
 
 	offset = guc_ads_regset_offset(guc);
 	addr_ggtt = intel_guc_ggtt_offset(guc, guc->ads_vma) + offset;
-	ads_registers = (struct guc_mmio_reg *)(((u8 *)blob) + offset);
 
-	memcpy(ads_registers, guc->ads_regset, guc->ads_regset_size);
+	iosys_map_memcpy_to(&guc->ads_map, offset, guc->ads_regset,
+			    guc->ads_regset_size);
 
 	for_each_engine(engine, gt, id) {
 		u32 count = guc->ads_regset_count[id];
-		struct guc_mmio_reg_set *ads_reg_set;
 		u8 guc_class;
 
 		/* Class index is checked in class converter */
 		GEM_BUG_ON(engine->instance >= GUC_MAX_INSTANCES_PER_CLASS);
 
 		guc_class = engine_class_to_guc_class(engine->class);
-		ads_reg_set = &blob->ads.reg_state_list[guc_class][engine->instance];
 
 		if (!count) {
-			ads_reg_set->address = 0;
-			ads_reg_set->count = 0;
+			ads_blob_write(guc,
+				       ads.reg_state_list[guc_class][engine->instance].address,
+				       0);
+			ads_blob_write(guc,
+				       ads.reg_state_list[guc_class][engine->instance].count,
+				       0);
 			continue;
 		}
 
-		ads_reg_set->address = addr_ggtt;
-		ads_reg_set->count = count;
+		ads_blob_write(guc,
+			       ads.reg_state_list[guc_class][engine->instance].address,
+			       addr_ggtt);
+		ads_blob_write(guc,
+			       ads.reg_state_list[guc_class][engine->instance].count,
+			       count);
 
 		addr_ggtt += count * sizeof(struct guc_mmio_reg);
 	}
@@ -643,7 +647,7 @@ static void __guc_ads_init(struct intel_guc *guc)
 	blob->ads.gt_system_info = base + ptr_offset(blob, system_info);
 
 	/* MMIO save/restore list */
-	guc_mmio_reg_state_init(guc, blob);
+	guc_mmio_reg_state_init(guc);
 
 	/* Private Data */
 	blob->ads.private_data = base + guc_ads_private_data_offset(guc);