[RFC PATCH] cmd: fwu: Dump custom fields from mdata structure

[Michal Simek]

The commit cb9ae40a16f0 ("tools: mkfwumdata: add logic to append vendor
data to the FWU metadata") added support for adding vendor data to mdata
structure but it is not visible anywhere that's why extend fwu command to
dump it.

Signed-off-by: Michal Simek <michal.simek at amd.com>
---

I am using this for some time to check various configurations that's why it
can be useful for others too.
Sughosh: Maybe there is better way how to dump it.
---
 cmd/fwu_mdata.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/cmd/fwu_mdata.c b/cmd/fwu_mdata.c
index 9c048d69a131..ff6435505167 100644
--- a/cmd/fwu_mdata.c
+++ b/cmd/fwu_mdata.c
@@ -7,6 +7,7 @@
 #include <dm.h>
 #include <fwu.h>
 #include <fwu_mdata.h>
+#include <hexdump.h>
 #include <log.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -45,6 +46,30 @@ static void print_mdata(struct fwu_data *data)
 			       img_info->accepted == 0x1 ? "yes" : "no");
 		}
 	}
+
+	if (data->version == 2) {
+		struct fwu_mdata *mdata = data->fwu_mdata;
+		struct fwu_fw_store_desc *desc;
+		void *end;
+		u32 diff;
+
+		/*
+		 * fwu_mdata defines only header that's why taking it as array
+		 * which exactly point to image description location
+		 */
+		desc = (struct fwu_fw_store_desc *)&mdata[1];
+
+		/* Number of entries is taken from for loop - variable i */
+		end = &desc->img_entry[i];
+		debug("mdata %p, desc %p, end %p\n", mdata, desc, end);
+
+		diff = data->metadata_size - ((void *)end - (void *)mdata);
+		if (diff) {
+			printf("Custom fields covered by CRC 0x%x\n", diff);
+			print_hex_dump_bytes("CUSTOM ", DUMP_PREFIX_OFFSET,
+					     end, diff);
+		}
+	}
 }
 
 int do_fwu_mdata_read(struct cmd_tbl *cmdtp, int flag,
-- 
2.40.1