[U-Boot] [RFC PATCH v3 14/16] cmd: mtdparts: update command to support GPT over MTD

[Patrick Delaunay]

add new subcommand :
mtdparts gpt <mtd-dev> [<GUID>]

extract mtd partition from GPT header present in MTD device
> mtdparts gpt nand0
> mtdparts gpt nor0

extract mtd partitions only for some GUID
> mtdparts gpt nand0 data
> mtdparts gpt nor0 0FC63DAF-8483-4772-8E79-3D69D8477DE4

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
Reviewed-by: Christophe KERELLO <christophe.kerello at st.com>
---

Changes in v3: None
Changes in v2: None

 cmd/mtdparts.c | 140 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 139 insertions(+), 1 deletion(-)

diff --git a/cmd/mtdparts.c b/cmd/mtdparts.c
index 5f97b80..159806e 100644
--- a/cmd/mtdparts.c
+++ b/cmd/mtdparts.c
@@ -1894,6 +1894,111 @@ static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part
 	return NULL;
 }
 
+#ifdef CONFIG_EFI_PARTITION_MTD
+/**
+ * extract MTD info from GPT information
+ *
+ * @param device string to select GPT device
+ * @param p_guid_filter guid for filtering add
+ *
+ * @return 0 on success, -ENODEV if no such device otherwise error
+ */
+
+static int mtdparts_gpt(char *device, char *p_guid_filter)
+{
+	char tmpbuf[PART_ADD_DESC_MAXLEN];
+	char size_str[17], start_str[17];
+	u8 type, num, len;
+	struct mtdids *id;
+	int part_id;
+	struct mtd_info *mtd;
+	struct mtd_device *dev;
+	struct mtd_device *dev_tmp;
+	disk_partition_t info;
+	struct part_info *p;
+	int ret;
+
+	if (mtd_id_parse(device, NULL, &type, &num) != 0) {
+		printf("invalid MTD device %s\n", device);
+		return 1;
+	}
+
+	/* this may be the first run, initialize lists if needed
+	   and make sure we are in sync with env variables */
+	mtdparts_init();
+	/* don't treat error (mtdparts can be empty) */
+
+	id = id_find(type, num);
+	if (id == NULL) {
+		printf("no such device %s defined in mtdids variable\n",
+		       device);
+		return -ENODEV;
+	}
+
+	if (get_mtd_info(type, num, &mtd) || (mtd == NULL)) {
+		printf("no such MTD device %s\n", device);
+		return -ENODEV;
+	}
+
+	for (part_id = 1; part_id <= GPT_ENTRY_NUMBERS; part_id++) {
+		if (part_get_info_efi_mtd(mtd, part_id, &info))
+			break; /* Stop for first non valid partition */
+
+#ifdef CONFIG_PARTITION_TYPE_GUID
+		if (p_guid_filter &&
+		    strcmp(p_guid_filter, info.type_guid))
+			continue;
+#endif
+		sprintf(size_str, "%llx", (u64)(info.size * info.blksz));
+		sprintf(start_str, "%llx", (u64)(info.start * info.blksz));
+
+		len = strlen(id->mtd_id) + 1;	/* 'mtd_id:' */
+		len += strlen(size_str) + 2;	/* 0x size */
+		len += strlen(start_str) + 3;	/* @0x start */
+		len += strlen((char *)&info.name) + 2;	/* '(' name ')' */
+
+		if (len >= PART_ADD_DESC_MAXLEN) {
+			printf("too long partition description\n");
+			return -EINVAL;
+		}
+
+		sprintf(tmpbuf, "%s:0x%s at 0x%s(%s)",
+			id->mtd_id, size_str, start_str, info.name);
+
+		debug("add tmpbuf: %s\n", tmpbuf);
+
+		ret = device_parse(tmpbuf, NULL, &dev);
+		if (ret)
+			return ret;
+
+		debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(type), num,
+		      id->mtd_id);
+
+		p = list_entry(dev->parts.next, struct part_info, link);
+
+		dev_tmp = device_find(type, num);
+
+		if (dev_tmp == NULL) {
+			device_add(dev);
+		} else {
+			ret = part_add(dev_tmp, p);
+			if (ret) {
+				free(dev);
+				return ret;
+			}
+		}
+	}
+
+	ret = generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN);
+	if (ret) {
+		printf("generated mtdparts too long, resetting to null\n");
+		return ret;
+	}
+
+	return 0;
+}
+#endif
+
 /***************************************************/
 /* U-Boot commands				   */
 /***************************************************/
@@ -1969,6 +2074,31 @@ static int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc,
 		}
 	}
 
+#ifdef CONFIG_EFI_PARTITION_MTD
+	/* mtdparts gpt <mtd-dev> [GUID] */
+	if ((argc == 3 || argc == 4) && (strncmp(argv[1], "gpt", 3) == 0)) {
+#ifdef CONFIG_PARTITION_TYPE_GUID
+		char guid_str[UUID_STR_LEN + 1];
+		char *p_guid_filter = NULL;
+#endif
+
+		if (argc == 4) {
+#ifdef CONFIG_PARTITION_TYPE_GUID
+			p_guid_filter = guid_str;
+			if (uuid_guid_parse_str(argv[3], guid_str)) {
+				printf("invalid type gui %s\n", argv[3]);
+				return 1;
+			}
+			debug("filtered type gui %s (%s)\n", argv[3], guid_str);
+#else
+			puts("type GUI not support\n");
+#endif
+		}
+
+		return mtdparts_gpt(argv[2], p_guid_filter);
+	}
+#endif
+
 	/* make sure we are in sync with env variables */
 	if (mtdparts_init() != 0)
 		return 1;
@@ -2085,6 +2215,10 @@ static char mtdparts_help_text[] =
 	"mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
 	"    - add partition, padding size by skipping bad blocks\n"
 #endif
+#ifdef CONFIG_EFI_PARTITION_MTD
+	"mtdparts gpt <mtd-dev> [<GUID>]\n"
+	"    - add partitions for device from gpt, filtered by GUID type\n"
+#endif
 	"mtdparts default\n"
 	"    - reset partition table to defaults\n"
 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
@@ -2114,7 +2248,11 @@ static char mtdparts_help_text[] =
 	"<size>     := standard linux memsize OR '-' to denote all remaining space\n"
 	"<offset>   := partition start offset within the device\n"
 	"<name>     := '(' NAME ')'\n"
-	"<ro-flag>  := when set to 'ro' makes partition read-only (not used, passed to kernel)";
+	"<ro-flag>  := when set to 'ro' makes partition read-only (not used, passed to kernel)\n"
+#ifdef CONFIG_EFI_PARTITION_MTD
+	"<GUID>     := partition guid\n"
+#endif
+	;
 #endif
 
 U_BOOT_CMD(
-- 
1.9.1