drm/xe: Introduce xe_tile_init_early and use at earlier point in probe

It also merges the GT (which is part of tile) initialization happening
at xe_info_init with allocating other per-tile data structures into a
common helper function.
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_device.c

@@ -393,12 +393,6 @@ int xe_device_probe(struct xe_device *xe)
 	if (err)
 		return err;
 
-	for_each_tile(tile, xe, id) {
-		err = xe_tile_alloc(tile);
-		if (err)
-			return err;
-	}
-
 	err = xe_mmio_init(xe);
 	if (err)
 		return err;

drivers/gpu/drm/xe/xe_pci.c

@@ -26,6 +26,7 @@
 #include "xe_pm.h"
 #include "xe_sriov.h"
 #include "xe_step.h"
+#include "xe_tile.h"
 
 enum toggle_d3cold {
 	D3COLD_DISABLE,
@@ -623,12 +624,11 @@ static int xe_info_init(struct xe_device *xe,
 	xe->info.tile_count = 1 + graphics_desc->max_remote_tiles;
 
 	for_each_tile(tile, xe, id) {
-		tile->xe = xe;
-		tile->id = id;
+		int err;
 
-		tile->primary_gt = xe_gt_alloc(tile);
-		if (IS_ERR(tile->primary_gt))
-			return PTR_ERR(tile->primary_gt);
+		err = xe_tile_init_early(tile, xe, id);
+		if (err)
+			return err;
 
 		gt = tile->primary_gt;
 		gt->info.id = xe->info.gt_count++;

drivers/gpu/drm/xe/xe_tile.c

@@ -7,6 +7,7 @@
 
 #include "xe_device.h"
 #include "xe_ggtt.h"
+#include "xe_gt.h"
 #include "xe_migrate.h"
 #include "xe_sa.h"
 #include "xe_tile.h"
@@ -80,7 +81,7 @@
  *
  * Returns -ENOMEM if allocations fail, otherwise 0.
  */
-int xe_tile_alloc(struct xe_tile *tile)
+static int xe_tile_alloc(struct xe_tile *tile)
 {
 	struct drm_device *drm = &tile_to_xe(tile)->drm;
 
@@ -97,6 +98,35 @@ int xe_tile_alloc(struct xe_tile *tile)
 	return 0;
 }
 
+/**
+ * xe_tile_init_early - Initialize the tile and primary GT
+ * @tile: Tile to initialize
+ * @xe: Parent Xe device
+ * @id: Tile ID
+ *
+ * Initializes per-tile resources that don't require any interactions with the
+ * hardware or any knowledge about the Graphics/Media IP version.
+ *
+ * Returns: 0 on success, negative error code on error.
+ */
+int xe_tile_init_early(struct xe_tile *tile, struct xe_device *xe, u8 id)
+{
+	int err;
+
+	tile->xe = xe;
+	tile->id = id;
+
+	err = xe_tile_alloc(tile);
+	if (err)
+		return err;
+
+	tile->primary_gt = xe_gt_alloc(tile);
+	if (IS_ERR(tile->primary_gt))
+		return PTR_ERR(tile->primary_gt);
+
+	return 0;
+}
+
 static int tile_ttm_mgr_init(struct xe_tile *tile)
 {
 	struct xe_device *xe = tile_to_xe(tile);

drivers/gpu/drm/xe/xe_tile.h

@@ -10,7 +10,7 @@
 
 struct xe_tile;
 
-int xe_tile_alloc(struct xe_tile *tile);
+int xe_tile_init_early(struct xe_tile *tile, struct xe_device *xe, u8 id);
 int xe_tile_init_noalloc(struct xe_tile *tile);
 
 void xe_tile_migrate_wait(struct xe_tile *tile);