Add metadata struct for UBI bakvol.
Currently , bakvol reserves 20 PEBs for internal log volume.
Shares wear-leveling operation with ubi.
Signed-off-by: Bean Huo <bean...@micron.com>
---
drivers/mtd/ubi/ubi-media.h | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/drivers/mtd/ubi/ubi-media.h b/drivers/mtd/ubi/ubi-media.h
index d0d072e..3315d5b 100644
--- a/drivers/mtd/ubi/ubi-media.h
+++ b/drivers/mtd/ubi/ubi-media.h
@@ -31,6 +31,7 @@
#define __UBI_MEDIA_H__
#include <asm/byteorder.h>
+#include <linux/list.h>
/* The version of UBI images supported by this implementation */
#define UBI_VERSION 1
@@ -295,7 +296,11 @@ struct ubi_vid_hdr {
} __packed;
/* Internal UBI volumes count */
+#ifdef CONFIG_MTD_UBI_MLC_NAND_BAKVOL
+#define UBI_INT_VOL_COUNT 2
+#else
#define UBI_INT_VOL_COUNT 1
+#endif
/*
* Starting ID of internal volumes: 0x7fffefff.
@@ -312,6 +317,15 @@ struct ubi_vid_hdr {
#define UBI_LAYOUT_VOLUME_NAME "layout volume"
#define UBI_LAYOUT_VOLUME_COMPAT UBI_COMPAT_REJECT
+/* The backup log volume */
+
+#define UBI_BACKUP_VOLUME_ID (UBI_INTERNAL_VOL_START + 1)
+#define UBI_BACKUP_VOLUME_TYPE UBI_VID_DYNAMIC
+#define UBI_BACKUP_VOLUME_ALIGN 1
+#define UBI_BACKUP_VOLUME_EBS 20
+#define UBI_BACKUP_VOLUME_NAME "log volume"
+#define UBI_BACKUP_VOLUME_COMPAT UBI_COMPAT_REJECT
+
/* The maximum number of volumes per one UBI device */
#define UBI_MAX_VOLUMES 128
@@ -325,6 +339,32 @@ struct ubi_vid_hdr {
#define UBI_VTBL_RECORD_SIZE_CRC (UBI_VTBL_RECORD_SIZE - sizeof(__be32))
/**
+ * struct ubi_bkblk_info - the information for one backup block .
+ * @pbn: physical block number
+ * @lbn: logic block number
+ * @plane: this block belongs to which plane
+ * @pgnum: the page number (lower page) that can be programmed last time
+ */
+struct ubi_bkblk_info {
+ __be32 pbn;
+ __be32 lbn;
+ __u8 plane;
+ __be32 pgnum;
+ struct list_head node;
+};
+
+/**
+ * struct ubi_bkblk_tbl - a table for backup blocks.
+ * @volume_built: indicate if backup volume be initted
+ * @bcount_of_plane: block count that has bee applied for corresponding plane
+ */
+struct ubi_bkblk_tbl {
+ __u8 volume_built;
+ __be32 bcount_of_plane[2];
+ struct list_head head;
+};
+
+/**
* struct ubi_vtbl_record - a record in the volume table.
* @reserved_pebs: how many physical eraseblocks are reserved for this volume
* @alignment: volume alignment
--
1.9.1
