dm: spl: Allow SPL to show memory usage

Add an option to tell SPL to show memory usage for driver model just
before it boots into the next phase.

Signed-off-by: Simon Glass <sjg@chromium.org>

common/spl/spl.c

@@ -34,6 +34,7 @@
 #include <malloc.h>
 #include <mapmem.h>
 #include <dm/root.h>
+#include <dm/util.h>
 #include <linux/compiler.h>
 #include <fdt_support.h>
 #include <bootcount.h>
@@ -780,6 +781,14 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
 
 	bootcount_inc();
 
+	/* Dump driver model states to aid analysis */
+	if (CONFIG_IS_ENABLED(DM_STATS)) {
+		struct dm_stats mem;
+
+		dm_get_mem(&mem);
+		dm_dump_mem(&mem);
+	}
+
 	memset(&spl_image, '\0', sizeof(spl_image));
 #ifdef CONFIG_SYS_SPL_ARGS_ADDR
 	spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;

drivers/core/Kconfig

@@ -86,6 +86,16 @@ config DM_STATS
 
 	  To display the memory stats, use the 'dm mem' command.
 
+config SPL_DM_STATS
+	bool "Collect and show driver model stats in SPL"
+	depends on DM_SPL
+	help
+	  Enable this to collect and display memory statistics about driver
+	  model. This can help to figure out where all the memory is going and
+	  to find optimisations.
+
+	  The stats are displayed just before SPL boots to the next phase.
+
 config DM_DEVICE_REMOVE
 	bool "Support device removal"
 	depends on DM