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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a7e93dcd9a
Function mtd_has_master renamed as mtd_is_partition to follow the function logic. The patch fixes the problem of checking the right mtd device for partition creation. To delete partition checking is not needed here so as it is done in mtd_del_partition. By master we consider the mtd device which does not belong to any partition. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/*
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* MTD partitioning layer definitions
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*
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* (C) 2000 Nicolas Pitre <nico@fluxnic.net>
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*
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* This code is GPL
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*/
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#ifndef MTD_PARTITIONS_H
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#define MTD_PARTITIONS_H
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#include <linux/types.h>
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/*
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* Partition definition structure:
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*
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* An array of struct partition is passed along with a MTD object to
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* add_mtd_partitions() to create them.
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*
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* For each partition, these fields are available:
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* name: string that will be used to label the partition's MTD device.
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* size: the partition size; if defined as MTDPART_SIZ_FULL, the partition
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* will extend to the end of the master MTD device.
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* offset: absolute starting position within the master MTD device; if
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* defined as MTDPART_OFS_APPEND, the partition will start where the
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* previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block.
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* mask_flags: contains flags that have to be masked (removed) from the
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* master MTD flag set for the corresponding MTD partition.
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* For example, to force a read-only partition, simply adding
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* MTD_WRITEABLE to the mask_flags will do the trick.
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*
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* Note: writeable partitions require their size and offset be
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* erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
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*/
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struct mtd_partition {
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char *name; /* identifier string */
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uint64_t size; /* partition size */
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uint64_t offset; /* offset within the master MTD space */
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uint32_t mask_flags; /* master MTD flags to mask out for this partition */
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struct nand_ecclayout *ecclayout; /* out of band layout for this partition (NAND only) */
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};
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#define MTDPART_OFS_NXTBLK (-2)
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#define MTDPART_OFS_APPEND (-1)
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#define MTDPART_SIZ_FULL (0)
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struct mtd_info;
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int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
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int del_mtd_partitions(struct mtd_info *);
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/*
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* Functions dealing with the various ways of partitioning the space
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*/
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struct mtd_part_parser {
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struct list_head list;
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struct module *owner;
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const char *name;
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int (*parse_fn)(struct mtd_info *, struct mtd_partition **, unsigned long);
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};
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extern int register_mtd_parser(struct mtd_part_parser *parser);
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extern int deregister_mtd_parser(struct mtd_part_parser *parser);
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extern int parse_mtd_partitions(struct mtd_info *master, const char **types,
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struct mtd_partition **pparts, unsigned long origin);
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#define put_partition_parser(p) do { module_put((p)->owner); } while(0)
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struct device;
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struct device_node;
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int __devinit of_mtd_parse_partitions(struct device *dev,
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struct device_node *node,
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struct mtd_partition **pparts);
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#ifdef CONFIG_MTD_PARTITIONS
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static inline int mtd_has_partitions(void) { return 1; }
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#else
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static inline int mtd_has_partitions(void) { return 0; }
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#endif
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#ifdef CONFIG_MTD_CMDLINE_PARTS
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static inline int mtd_has_cmdlinepart(void) { return 1; }
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#else
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static inline int mtd_has_cmdlinepart(void) { return 0; }
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#endif
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int mtd_is_partition(struct mtd_info *mtd);
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int mtd_add_partition(struct mtd_info *master, char *name,
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long long offset, long long length);
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int mtd_del_partition(struct mtd_info *master, int partno);
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#endif
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