Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / mtd / partitions.h

diff --git a/kernel/include/linux/mtd/partitions.h b/kernel/include/linux/mtd/partitions.h
new file mode 100644 (file)
index 0000000..6a35e6d
--- /dev/null
+++ b/kernel/include/linux/mtd/partitions.h
@@ -0,0 +1,88 @@
+/*
+ * MTD partitioning layer definitions
+ *
+ * (C) 2000 Nicolas Pitre <nico@fluxnic.net>
+ *
+ * This code is GPL
+ */
+
+#ifndef MTD_PARTITIONS_H
+#define MTD_PARTITIONS_H
+
+#include <linux/types.h>
+
+
+/*
+ * Partition definition structure:
+ *
+ * An array of struct partition is passed along with a MTD object to
+ * mtd_device_register() to create them.
+ *
+ * For each partition, these fields are available:
+ * name: string that will be used to label the partition's MTD device.
+ * size: the partition size; if defined as MTDPART_SIZ_FULL, the partition
+ *     will extend to the end of the master MTD device.
+ * offset: absolute starting position within the master MTD device; if
+ *     defined as MTDPART_OFS_APPEND, the partition will start where the
+ *     previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block;
+ *     if MTDPART_OFS_RETAIN, consume as much as possible, leaving size
+ *     after the end of partition.
+ * mask_flags: contains flags that have to be masked (removed) from the
+ *     master MTD flag set for the corresponding MTD partition.
+ *     For example, to force a read-only partition, simply adding
+ *     MTD_WRITEABLE to the mask_flags will do the trick.
+ *
+ * Note: writeable partitions require their size and offset be
+ * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
+ */
+
+struct mtd_partition {
+       const char *name;               /* identifier string */
+       uint64_t size;                  /* partition size */
+       uint64_t offset;                /* offset within the master MTD space */
+       uint32_t mask_flags;            /* master MTD flags to mask out for this partition */
+       struct nand_ecclayout *ecclayout;       /* out of band layout for this partition (NAND only) */
+};
+
+#define MTDPART_OFS_RETAIN     (-3)
+#define MTDPART_OFS_NXTBLK     (-2)
+#define MTDPART_OFS_APPEND     (-1)
+#define MTDPART_SIZ_FULL       (0)
+
+
+struct mtd_info;
+struct device_node;
+
+/**
+ * struct mtd_part_parser_data - used to pass data to MTD partition parsers.
+ * @origin: for RedBoot, start address of MTD device
+ * @of_node: for OF parsers, device node containing partitioning information
+ */
+struct mtd_part_parser_data {
+       unsigned long origin;
+       struct device_node *of_node;
+};
+
+
+/*
+ * Functions dealing with the various ways of partitioning the space
+ */
+
+struct mtd_part_parser {
+       struct list_head list;
+       struct module *owner;
+       const char *name;
+       int (*parse_fn)(struct mtd_info *, struct mtd_partition **,
+                       struct mtd_part_parser_data *);
+};
+
+extern void register_mtd_parser(struct mtd_part_parser *parser);
+extern void deregister_mtd_parser(struct mtd_part_parser *parser);
+
+int mtd_is_partition(const struct mtd_info *mtd);
+int mtd_add_partition(struct mtd_info *master, const char *name,
+                     long long offset, long long length);
+int mtd_del_partition(struct mtd_info *master, int partno);
+uint64_t mtd_get_device_size(const struct mtd_info *mtd);
+
+#endif