587 lines
19 KiB
C
587 lines
19 KiB
C
/*
|
|
* Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> et al.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#ifndef __MTD_MTD_H__
|
|
#define __MTD_MTD_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/uio.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/device.h>
|
|
#include <linux/of.h>
|
|
|
|
#include <mtd/mtd-abi.h>
|
|
|
|
#include <asm/div64.h>
|
|
|
|
#define MTD_ERASE_PENDING 0x01
|
|
#define MTD_ERASING 0x02
|
|
#define MTD_ERASE_SUSPEND 0x04
|
|
#define MTD_ERASE_DONE 0x08
|
|
#define MTD_ERASE_FAILED 0x10
|
|
|
|
#define MTD_FAIL_ADDR_UNKNOWN -1LL
|
|
|
|
/*
|
|
* If the erase fails, fail_addr might indicate exactly which block failed. If
|
|
* fail_addr = MTD_FAIL_ADDR_UNKNOWN, the failure was not at the device level
|
|
* or was not specific to any particular block.
|
|
*/
|
|
struct erase_info {
|
|
struct mtd_info *mtd;
|
|
uint64_t addr;
|
|
uint64_t len;
|
|
uint64_t fail_addr;
|
|
u_long time;
|
|
u_long retries;
|
|
unsigned dev;
|
|
unsigned cell;
|
|
void (*callback) (struct erase_info *self);
|
|
u_long priv;
|
|
u_char state;
|
|
struct erase_info *next;
|
|
};
|
|
|
|
struct mtd_erase_region_info {
|
|
uint64_t offset; /* At which this region starts, from the beginning of the MTD */
|
|
uint32_t erasesize; /* For this region */
|
|
uint32_t numblocks; /* Number of blocks of erasesize in this region */
|
|
unsigned long *lockmap; /* If keeping bitmap of locks */
|
|
};
|
|
|
|
/**
|
|
* struct mtd_oob_ops - oob operation operands
|
|
* @mode: operation mode
|
|
*
|
|
* @len: number of data bytes to write/read
|
|
*
|
|
* @retlen: number of data bytes written/read
|
|
*
|
|
* @ooblen: number of oob bytes to write/read
|
|
* @oobretlen: number of oob bytes written/read
|
|
* @ooboffs: offset of oob data in the oob area (only relevant when
|
|
* mode = MTD_OPS_PLACE_OOB or MTD_OPS_RAW)
|
|
* @datbuf: data buffer - if NULL only oob data are read/written
|
|
* @oobbuf: oob data buffer
|
|
*
|
|
* Note, it is allowed to read more than one OOB area at one go, but not write.
|
|
* The interface assumes that the OOB write requests program only one page's
|
|
* OOB area.
|
|
*/
|
|
struct mtd_oob_ops {
|
|
unsigned int mode;
|
|
size_t len;
|
|
size_t retlen;
|
|
size_t ooblen;
|
|
size_t oobretlen;
|
|
uint32_t ooboffs;
|
|
uint8_t *datbuf;
|
|
uint8_t *oobbuf;
|
|
};
|
|
|
|
#define MTD_MAX_OOBFREE_ENTRIES_LARGE 32
|
|
#define MTD_MAX_ECCPOS_ENTRIES_LARGE 640
|
|
/**
|
|
* struct mtd_oob_region - oob region definition
|
|
* @offset: region offset
|
|
* @length: region length
|
|
*
|
|
* This structure describes a region of the OOB area, and is used
|
|
* to retrieve ECC or free bytes sections.
|
|
* Each section is defined by an offset within the OOB area and a
|
|
* length.
|
|
*/
|
|
struct mtd_oob_region {
|
|
u32 offset;
|
|
u32 length;
|
|
};
|
|
|
|
/*
|
|
* struct mtd_ooblayout_ops - NAND OOB layout operations
|
|
* @ecc: function returning an ECC region in the OOB area.
|
|
* Should return -ERANGE if %section exceeds the total number of
|
|
* ECC sections.
|
|
* @free: function returning a free region in the OOB area.
|
|
* Should return -ERANGE if %section exceeds the total number of
|
|
* free sections.
|
|
*/
|
|
struct mtd_ooblayout_ops {
|
|
int (*ecc)(struct mtd_info *mtd, int section,
|
|
struct mtd_oob_region *oobecc);
|
|
int (*free)(struct mtd_info *mtd, int section,
|
|
struct mtd_oob_region *oobfree);
|
|
};
|
|
|
|
/**
|
|
* struct mtd_pairing_info - page pairing information
|
|
*
|
|
* @pair: pair id
|
|
* @group: group id
|
|
*
|
|
* The term "pair" is used here, even though TLC NANDs might group pages by 3
|
|
* (3 bits in a single cell). A pair should regroup all pages that are sharing
|
|
* the same cell. Pairs are then indexed in ascending order.
|
|
*
|
|
* @group is defining the position of a page in a given pair. It can also be
|
|
* seen as the bit position in the cell: page attached to bit 0 belongs to
|
|
* group 0, page attached to bit 1 belongs to group 1, etc.
|
|
*
|
|
* Example:
|
|
* The H27UCG8T2BTR-BC datasheet describes the following pairing scheme:
|
|
*
|
|
* group-0 group-1
|
|
*
|
|
* pair-0 page-0 page-4
|
|
* pair-1 page-1 page-5
|
|
* pair-2 page-2 page-8
|
|
* ...
|
|
* pair-127 page-251 page-255
|
|
*
|
|
*
|
|
* Note that the "group" and "pair" terms were extracted from Samsung and
|
|
* Hynix datasheets, and might be referenced under other names in other
|
|
* datasheets (Micron is describing this concept as "shared pages").
|
|
*/
|
|
struct mtd_pairing_info {
|
|
int pair;
|
|
int group;
|
|
};
|
|
|
|
/**
|
|
* struct mtd_pairing_scheme - page pairing scheme description
|
|
*
|
|
* @ngroups: number of groups. Should be related to the number of bits
|
|
* per cell.
|
|
* @get_info: converts a write-unit (page number within an erase block) into
|
|
* mtd_pairing information (pair + group). This function should
|
|
* fill the info parameter based on the wunit index or return
|
|
* -EINVAL if the wunit parameter is invalid.
|
|
* @get_wunit: converts pairing information into a write-unit (page) number.
|
|
* This function should return the wunit index pointed by the
|
|
* pairing information described in the info argument. It should
|
|
* return -EINVAL, if there's no wunit corresponding to the
|
|
* passed pairing information.
|
|
*
|
|
* See mtd_pairing_info documentation for a detailed explanation of the
|
|
* pair and group concepts.
|
|
*
|
|
* The mtd_pairing_scheme structure provides a generic solution to represent
|
|
* NAND page pairing scheme. Instead of exposing two big tables to do the
|
|
* write-unit <-> (pair + group) conversions, we ask the MTD drivers to
|
|
* implement the ->get_info() and ->get_wunit() functions.
|
|
*
|
|
* MTD users will then be able to query these information by using the
|
|
* mtd_pairing_info_to_wunit() and mtd_wunit_to_pairing_info() helpers.
|
|
*
|
|
* @ngroups is here to help MTD users iterating over all the pages in a
|
|
* given pair. This value can be retrieved by MTD users using the
|
|
* mtd_pairing_groups() helper.
|
|
*
|
|
* Examples are given in the mtd_pairing_info_to_wunit() and
|
|
* mtd_wunit_to_pairing_info() documentation.
|
|
*/
|
|
struct mtd_pairing_scheme {
|
|
int ngroups;
|
|
int (*get_info)(struct mtd_info *mtd, int wunit,
|
|
struct mtd_pairing_info *info);
|
|
int (*get_wunit)(struct mtd_info *mtd,
|
|
const struct mtd_pairing_info *info);
|
|
};
|
|
|
|
struct module; /* only needed for owner field in mtd_info */
|
|
|
|
/**
|
|
* struct mtd_debug_info - debugging information for an MTD device.
|
|
*
|
|
* @dfs_dir: direntry object of the MTD device debugfs directory
|
|
*/
|
|
struct mtd_debug_info {
|
|
struct dentry *dfs_dir;
|
|
};
|
|
|
|
struct mtd_info {
|
|
u_char type;
|
|
uint32_t flags;
|
|
uint64_t size; // Total size of the MTD
|
|
|
|
/* "Major" erase size for the device. Naïve users may take this
|
|
* to be the only erase size available, or may use the more detailed
|
|
* information below if they desire
|
|
*/
|
|
uint32_t erasesize;
|
|
/* Minimal writable flash unit size. In case of NOR flash it is 1 (even
|
|
* though individual bits can be cleared), in case of NAND flash it is
|
|
* one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR
|
|
* it is of ECC block size, etc. It is illegal to have writesize = 0.
|
|
* Any driver registering a struct mtd_info must ensure a writesize of
|
|
* 1 or larger.
|
|
*/
|
|
uint32_t writesize;
|
|
|
|
/*
|
|
* Size of the write buffer used by the MTD. MTD devices having a write
|
|
* buffer can write multiple writesize chunks at a time. E.g. while
|
|
* writing 4 * writesize bytes to a device with 2 * writesize bytes
|
|
* buffer the MTD driver can (but doesn't have to) do 2 writesize
|
|
* operations, but not 4. Currently, all NANDs have writebufsize
|
|
* equivalent to writesize (NAND page size). Some NOR flashes do have
|
|
* writebufsize greater than writesize.
|
|
*/
|
|
uint32_t writebufsize;
|
|
|
|
uint32_t oobsize; // Amount of OOB data per block (e.g. 16)
|
|
uint32_t oobavail; // Available OOB bytes per block
|
|
|
|
/*
|
|
* If erasesize is a power of 2 then the shift is stored in
|
|
* erasesize_shift otherwise erasesize_shift is zero. Ditto writesize.
|
|
*/
|
|
unsigned int erasesize_shift;
|
|
unsigned int writesize_shift;
|
|
/* Masks based on erasesize_shift and writesize_shift */
|
|
unsigned int erasesize_mask;
|
|
unsigned int writesize_mask;
|
|
|
|
/*
|
|
* read ops return -EUCLEAN if max number of bitflips corrected on any
|
|
* one region comprising an ecc step equals or exceeds this value.
|
|
* Settable by driver, else defaults to ecc_strength. User can override
|
|
* in sysfs. N.B. The meaning of the -EUCLEAN return code has changed;
|
|
* see Documentation/ABI/testing/sysfs-class-mtd for more detail.
|
|
*/
|
|
unsigned int bitflip_threshold;
|
|
|
|
/* Kernel-only stuff starts here. */
|
|
const char *name;
|
|
int index;
|
|
|
|
/* OOB layout description */
|
|
const struct mtd_ooblayout_ops *ooblayout;
|
|
|
|
/* NAND pairing scheme, only provided for MLC/TLC NANDs */
|
|
const struct mtd_pairing_scheme *pairing;
|
|
|
|
/* the ecc step size. */
|
|
unsigned int ecc_step_size;
|
|
|
|
/* max number of correctible bit errors per ecc step */
|
|
unsigned int ecc_strength;
|
|
|
|
/* Data for variable erase regions. If numeraseregions is zero,
|
|
* it means that the whole device has erasesize as given above.
|
|
*/
|
|
int numeraseregions;
|
|
struct mtd_erase_region_info *eraseregions;
|
|
|
|
/*
|
|
* Do not call via these pointers, use corresponding mtd_*()
|
|
* wrappers instead.
|
|
*/
|
|
int (*_erase) (struct mtd_info *mtd, struct erase_info *instr);
|
|
int (*_point) (struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, void **virt, resource_size_t *phys);
|
|
int (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
|
|
int (*_read) (struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, u_char *buf);
|
|
int (*_write) (struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, const u_char *buf);
|
|
int (*_panic_write) (struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, const u_char *buf);
|
|
int (*_read_oob) (struct mtd_info *mtd, loff_t from,
|
|
struct mtd_oob_ops *ops);
|
|
int (*_write_oob) (struct mtd_info *mtd, loff_t to,
|
|
struct mtd_oob_ops *ops);
|
|
int (*_get_fact_prot_info) (struct mtd_info *mtd, size_t len,
|
|
size_t *retlen, struct otp_info *buf);
|
|
int (*_read_fact_prot_reg) (struct mtd_info *mtd, loff_t from,
|
|
size_t len, size_t *retlen, u_char *buf);
|
|
int (*_get_user_prot_info) (struct mtd_info *mtd, size_t len,
|
|
size_t *retlen, struct otp_info *buf);
|
|
int (*_read_user_prot_reg) (struct mtd_info *mtd, loff_t from,
|
|
size_t len, size_t *retlen, u_char *buf);
|
|
int (*_write_user_prot_reg) (struct mtd_info *mtd, loff_t to,
|
|
size_t len, size_t *retlen, u_char *buf);
|
|
int (*_lock_user_prot_reg) (struct mtd_info *mtd, loff_t from,
|
|
size_t len);
|
|
int (*_writev) (struct mtd_info *mtd, const struct kvec *vecs,
|
|
unsigned long count, loff_t to, size_t *retlen);
|
|
void (*_sync) (struct mtd_info *mtd);
|
|
int (*_lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
|
|
int (*_unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
|
|
int (*_is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
|
|
int (*_block_isreserved) (struct mtd_info *mtd, loff_t ofs);
|
|
int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs);
|
|
int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);
|
|
int (*_max_bad_blocks) (struct mtd_info *mtd, loff_t ofs, size_t len);
|
|
int (*_suspend) (struct mtd_info *mtd);
|
|
void (*_resume) (struct mtd_info *mtd);
|
|
void (*_reboot) (struct mtd_info *mtd);
|
|
/*
|
|
* If the driver is something smart, like UBI, it may need to maintain
|
|
* its own reference counting. The below functions are only for driver.
|
|
*/
|
|
int (*_get_device) (struct mtd_info *mtd);
|
|
void (*_put_device) (struct mtd_info *mtd);
|
|
|
|
struct notifier_block reboot_notifier; /* default mode before reboot */
|
|
|
|
/* ECC status information */
|
|
struct mtd_ecc_stats ecc_stats;
|
|
/* Subpage shift (NAND) */
|
|
int subpage_sft;
|
|
|
|
void *priv;
|
|
|
|
struct module *owner;
|
|
struct device dev;
|
|
int usecount;
|
|
struct mtd_debug_info dbg;
|
|
};
|
|
|
|
int mtd_ooblayout_ecc(struct mtd_info *mtd, int section,
|
|
struct mtd_oob_region *oobecc);
|
|
int mtd_ooblayout_find_eccregion(struct mtd_info *mtd, int eccbyte,
|
|
int *section,
|
|
struct mtd_oob_region *oobregion);
|
|
int mtd_ooblayout_get_eccbytes(struct mtd_info *mtd, u8 *eccbuf,
|
|
const u8 *oobbuf, int start, int nbytes);
|
|
int mtd_ooblayout_set_eccbytes(struct mtd_info *mtd, const u8 *eccbuf,
|
|
u8 *oobbuf, int start, int nbytes);
|
|
int mtd_ooblayout_free(struct mtd_info *mtd, int section,
|
|
struct mtd_oob_region *oobfree);
|
|
int mtd_ooblayout_get_databytes(struct mtd_info *mtd, u8 *databuf,
|
|
const u8 *oobbuf, int start, int nbytes);
|
|
int mtd_ooblayout_set_databytes(struct mtd_info *mtd, const u8 *databuf,
|
|
u8 *oobbuf, int start, int nbytes);
|
|
int mtd_ooblayout_count_freebytes(struct mtd_info *mtd);
|
|
int mtd_ooblayout_count_eccbytes(struct mtd_info *mtd);
|
|
|
|
static inline void mtd_set_ooblayout(struct mtd_info *mtd,
|
|
const struct mtd_ooblayout_ops *ooblayout)
|
|
{
|
|
mtd->ooblayout = ooblayout;
|
|
}
|
|
|
|
static inline void mtd_set_pairing_scheme(struct mtd_info *mtd,
|
|
const struct mtd_pairing_scheme *pairing)
|
|
{
|
|
mtd->pairing = pairing;
|
|
}
|
|
|
|
static inline void mtd_set_of_node(struct mtd_info *mtd,
|
|
struct device_node *np)
|
|
{
|
|
mtd->dev.of_node = np;
|
|
if (!mtd->name)
|
|
of_property_read_string(np, "label", &mtd->name);
|
|
}
|
|
|
|
static inline struct device_node *mtd_get_of_node(struct mtd_info *mtd)
|
|
{
|
|
return dev_of_node(&mtd->dev);
|
|
}
|
|
|
|
static inline int mtd_oobavail(struct mtd_info *mtd, struct mtd_oob_ops *ops)
|
|
{
|
|
return ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize;
|
|
}
|
|
|
|
static inline int mtd_max_bad_blocks(struct mtd_info *mtd,
|
|
loff_t ofs, size_t len)
|
|
{
|
|
if (!mtd->_max_bad_blocks)
|
|
return -ENOTSUPP;
|
|
|
|
if (mtd->size < (len + ofs) || ofs < 0)
|
|
return -EINVAL;
|
|
|
|
return mtd->_max_bad_blocks(mtd, ofs, len);
|
|
}
|
|
|
|
int mtd_wunit_to_pairing_info(struct mtd_info *mtd, int wunit,
|
|
struct mtd_pairing_info *info);
|
|
int mtd_pairing_info_to_wunit(struct mtd_info *mtd,
|
|
const struct mtd_pairing_info *info);
|
|
int mtd_pairing_groups(struct mtd_info *mtd);
|
|
int mtd_erase(struct mtd_info *mtd, struct erase_info *instr);
|
|
int mtd_point(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen,
|
|
void **virt, resource_size_t *phys);
|
|
int mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len);
|
|
unsigned long mtd_get_unmapped_area(struct mtd_info *mtd, unsigned long len,
|
|
unsigned long offset, unsigned long flags);
|
|
int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen,
|
|
u_char *buf);
|
|
int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
|
|
const u_char *buf);
|
|
int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
|
|
const u_char *buf);
|
|
|
|
int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops);
|
|
int mtd_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops);
|
|
|
|
int mtd_get_fact_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
|
|
struct otp_info *buf);
|
|
int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, u_char *buf);
|
|
int mtd_get_user_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
|
|
struct otp_info *buf);
|
|
int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, u_char *buf);
|
|
int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, u_char *buf);
|
|
int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len);
|
|
|
|
int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
|
|
unsigned long count, loff_t to, size_t *retlen);
|
|
|
|
static inline void mtd_sync(struct mtd_info *mtd)
|
|
{
|
|
if (mtd->_sync)
|
|
mtd->_sync(mtd);
|
|
}
|
|
|
|
int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
|
|
int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
|
|
int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len);
|
|
int mtd_block_isreserved(struct mtd_info *mtd, loff_t ofs);
|
|
int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs);
|
|
int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs);
|
|
|
|
static inline int mtd_suspend(struct mtd_info *mtd)
|
|
{
|
|
return mtd->_suspend ? mtd->_suspend(mtd) : 0;
|
|
}
|
|
|
|
static inline void mtd_resume(struct mtd_info *mtd)
|
|
{
|
|
if (mtd->_resume)
|
|
mtd->_resume(mtd);
|
|
}
|
|
|
|
static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
|
|
{
|
|
if (mtd->erasesize_shift)
|
|
return sz >> mtd->erasesize_shift;
|
|
do_div(sz, mtd->erasesize);
|
|
return sz;
|
|
}
|
|
|
|
static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd)
|
|
{
|
|
if (mtd->erasesize_shift)
|
|
return sz & mtd->erasesize_mask;
|
|
return do_div(sz, mtd->erasesize);
|
|
}
|
|
|
|
static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
|
|
{
|
|
if (mtd->writesize_shift)
|
|
return sz >> mtd->writesize_shift;
|
|
do_div(sz, mtd->writesize);
|
|
return sz;
|
|
}
|
|
|
|
static inline uint32_t mtd_mod_by_ws(uint64_t sz, struct mtd_info *mtd)
|
|
{
|
|
if (mtd->writesize_shift)
|
|
return sz & mtd->writesize_mask;
|
|
return do_div(sz, mtd->writesize);
|
|
}
|
|
|
|
static inline int mtd_wunit_per_eb(struct mtd_info *mtd)
|
|
{
|
|
return mtd->erasesize / mtd->writesize;
|
|
}
|
|
|
|
static inline int mtd_offset_to_wunit(struct mtd_info *mtd, loff_t offs)
|
|
{
|
|
return mtd_div_by_ws(mtd_mod_by_eb(offs, mtd), mtd);
|
|
}
|
|
|
|
static inline loff_t mtd_wunit_to_offset(struct mtd_info *mtd, loff_t base,
|
|
int wunit)
|
|
{
|
|
return base + (wunit * mtd->writesize);
|
|
}
|
|
|
|
|
|
static inline int mtd_has_oob(const struct mtd_info *mtd)
|
|
{
|
|
return mtd->_read_oob && mtd->_write_oob;
|
|
}
|
|
|
|
static inline int mtd_type_is_nand(const struct mtd_info *mtd)
|
|
{
|
|
return mtd->type == MTD_NANDFLASH || mtd->type == MTD_MLCNANDFLASH;
|
|
}
|
|
|
|
static inline int mtd_can_have_bb(const struct mtd_info *mtd)
|
|
{
|
|
return !!mtd->_block_isbad;
|
|
}
|
|
|
|
/* Kernel-side ioctl definitions */
|
|
|
|
struct mtd_partition;
|
|
struct mtd_part_parser_data;
|
|
|
|
extern int mtd_device_parse_register(struct mtd_info *mtd,
|
|
const char * const *part_probe_types,
|
|
struct mtd_part_parser_data *parser_data,
|
|
const struct mtd_partition *defparts,
|
|
int defnr_parts);
|
|
#define mtd_device_register(master, parts, nr_parts) \
|
|
mtd_device_parse_register(master, NULL, NULL, parts, nr_parts)
|
|
extern int mtd_device_unregister(struct mtd_info *master);
|
|
extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num);
|
|
extern int __get_mtd_device(struct mtd_info *mtd);
|
|
extern void __put_mtd_device(struct mtd_info *mtd);
|
|
extern struct mtd_info *get_mtd_device_nm(const char *name);
|
|
extern void put_mtd_device(struct mtd_info *mtd);
|
|
|
|
|
|
struct mtd_notifier {
|
|
void (*add)(struct mtd_info *mtd);
|
|
void (*remove)(struct mtd_info *mtd);
|
|
struct list_head list;
|
|
};
|
|
|
|
|
|
extern void register_mtd_user (struct mtd_notifier *new);
|
|
extern int unregister_mtd_user (struct mtd_notifier *old);
|
|
void *mtd_kmalloc_up_to(const struct mtd_info *mtd, size_t *size);
|
|
|
|
void mtd_erase_callback(struct erase_info *instr);
|
|
|
|
static inline int mtd_is_bitflip(int err) {
|
|
return err == -EUCLEAN;
|
|
}
|
|
|
|
static inline int mtd_is_eccerr(int err) {
|
|
return err == -EBADMSG;
|
|
}
|
|
|
|
static inline int mtd_is_bitflip_or_eccerr(int err) {
|
|
return mtd_is_bitflip(err) || mtd_is_eccerr(err);
|
|
}
|
|
|
|
unsigned mtd_mmap_capabilities(struct mtd_info *mtd);
|
|
|
|
#endif /* __MTD_MTD_H__ */
|