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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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638d983840
This updates the Primary Vendor-Specific Extended Query parsing to version 1.4 in order to get the information about the Configurable Programming Mode regions implemented in the Sibley flash, as well as selecting the appropriate write command code. This flash does not behave like traditional NOR flash when writing data. While mtdblock should just work, further changes are needed for JFFS2 use. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
240 lines
8.1 KiB
C
240 lines
8.1 KiB
C
/*
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* $Id: mtd.h,v 1.60 2005/08/06 04:40:42 nico Exp $
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*
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* Copyright (C) 1999-2003 David Woodhouse <dwmw2@infradead.org> et al.
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*
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* Released under GPL
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*/
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#ifndef __MTD_MTD_H__
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#define __MTD_MTD_H__
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#ifndef __KERNEL__
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#error This is a kernel header. Perhaps include mtd-user.h instead?
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#endif
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#include <linux/config.h>
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#include <linux/version.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/uio.h>
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#include <linux/notifier.h>
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#include <linux/mtd/compatmac.h>
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#include <mtd/mtd-abi.h>
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#define MTD_CHAR_MAJOR 90
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#define MTD_BLOCK_MAJOR 31
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#define MAX_MTD_DEVICES 16
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#define MTD_ERASE_PENDING 0x01
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#define MTD_ERASING 0x02
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#define MTD_ERASE_SUSPEND 0x04
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#define MTD_ERASE_DONE 0x08
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#define MTD_ERASE_FAILED 0x10
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/* If the erase fails, fail_addr might indicate exactly which block failed. If
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fail_addr = 0xffffffff, the failure was not at the device level or was not
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specific to any particular block. */
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struct erase_info {
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struct mtd_info *mtd;
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u_int32_t addr;
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u_int32_t len;
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u_int32_t fail_addr;
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u_long time;
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u_long retries;
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u_int dev;
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u_int cell;
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void (*callback) (struct erase_info *self);
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u_long priv;
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u_char state;
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struct erase_info *next;
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};
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struct mtd_erase_region_info {
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u_int32_t offset; /* At which this region starts, from the beginning of the MTD */
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u_int32_t erasesize; /* For this region */
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u_int32_t numblocks; /* Number of blocks of erasesize in this region */
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};
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struct mtd_info {
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u_char type;
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u_int32_t flags;
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u_int32_t size; // Total size of the MTD
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/* "Major" erase size for the device. Naïve users may take this
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* to be the only erase size available, or may use the more detailed
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* information below if they desire
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*/
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u_int32_t erasesize;
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u_int32_t oobblock; // Size of OOB blocks (e.g. 512)
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u_int32_t oobsize; // Amount of OOB data per block (e.g. 16)
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u_int32_t ecctype;
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u_int32_t eccsize;
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/*
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* Reuse some of the above unused fields in the case of NOR flash
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* with configurable programming regions to avoid modifying the
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* user visible structure layout/size. Only valid when the
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* MTD_PROGRAM_REGIONS flag is set.
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* (Maybe we should have an union for those?)
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*/
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#define MTD_PROGREGION_SIZE(mtd) (mtd)->oobblock
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#define MTD_PROGREGION_CTRLMODE_VALID(mtd) (mtd)->oobsize
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#define MTD_PROGREGION_CTRLMODE_INVALID(mtd) (mtd)->ecctype
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// Kernel-only stuff starts here.
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char *name;
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int index;
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// oobinfo is a nand_oobinfo structure, which can be set by iotcl (MEMSETOOBINFO)
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struct nand_oobinfo oobinfo;
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u_int32_t oobavail; // Number of bytes in OOB area available for fs
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/* Data for variable erase regions. If numeraseregions is zero,
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* it means that the whole device has erasesize as given above.
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*/
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int numeraseregions;
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struct mtd_erase_region_info *eraseregions;
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/* This really shouldn't be here. It can go away in 2.5 */
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u_int32_t bank_size;
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int (*erase) (struct mtd_info *mtd, struct erase_info *instr);
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/* This stuff for eXecute-In-Place */
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int (*point) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf);
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/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
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void (*unpoint) (struct mtd_info *mtd, u_char * addr, loff_t from, size_t len);
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int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
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int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
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int (*read_ecc) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
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int (*write_ecc) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
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int (*read_oob) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
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int (*write_oob) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
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/*
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* Methods to access the protection register area, present in some
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* flash devices. The user data is one time programmable but the
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* factory data is read only.
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*/
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int (*get_fact_prot_info) (struct mtd_info *mtd, struct otp_info *buf, size_t len);
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int (*read_fact_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
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int (*get_user_prot_info) (struct mtd_info *mtd, struct otp_info *buf, size_t len);
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int (*read_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
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int (*write_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
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int (*lock_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len);
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/* kvec-based read/write methods. We need these especially for NAND flash,
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with its limited number of write cycles per erase.
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NB: The 'count' parameter is the number of _vectors_, each of
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which contains an (ofs, len) tuple.
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*/
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int (*readv) (struct mtd_info *mtd, struct kvec *vecs, unsigned long count, loff_t from, size_t *retlen);
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int (*readv_ecc) (struct mtd_info *mtd, struct kvec *vecs, unsigned long count, loff_t from,
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size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
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int (*writev) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen);
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int (*writev_ecc) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to,
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size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
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/* Sync */
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void (*sync) (struct mtd_info *mtd);
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/* Chip-supported device locking */
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int (*lock) (struct mtd_info *mtd, loff_t ofs, size_t len);
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int (*unlock) (struct mtd_info *mtd, loff_t ofs, size_t len);
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/* Power Management functions */
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int (*suspend) (struct mtd_info *mtd);
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void (*resume) (struct mtd_info *mtd);
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/* Bad block management functions */
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int (*block_isbad) (struct mtd_info *mtd, loff_t ofs);
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int (*block_markbad) (struct mtd_info *mtd, loff_t ofs);
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struct notifier_block reboot_notifier; /* default mode before reboot */
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void *priv;
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struct module *owner;
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int usecount;
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};
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/* Kernel-side ioctl definitions */
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extern int add_mtd_device(struct mtd_info *mtd);
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extern int del_mtd_device (struct mtd_info *mtd);
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extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num);
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extern void put_mtd_device(struct mtd_info *mtd);
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struct mtd_notifier {
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void (*add)(struct mtd_info *mtd);
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void (*remove)(struct mtd_info *mtd);
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struct list_head list;
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};
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extern void register_mtd_user (struct mtd_notifier *new);
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extern int unregister_mtd_user (struct mtd_notifier *old);
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int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
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unsigned long count, loff_t to, size_t *retlen);
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int default_mtd_readv(struct mtd_info *mtd, struct kvec *vecs,
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unsigned long count, loff_t from, size_t *retlen);
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#define MTD_ERASE(mtd, args...) (*(mtd->erase))(mtd, args)
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#define MTD_POINT(mtd, a,b,c,d) (*(mtd->point))(mtd, a,b,c, (u_char **)(d))
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#define MTD_UNPOINT(mtd, arg) (*(mtd->unpoint))(mtd, (u_char *)arg)
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#define MTD_READ(mtd, args...) (*(mtd->read))(mtd, args)
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#define MTD_WRITE(mtd, args...) (*(mtd->write))(mtd, args)
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#define MTD_READV(mtd, args...) (*(mtd->readv))(mtd, args)
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#define MTD_WRITEV(mtd, args...) (*(mtd->writev))(mtd, args)
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#define MTD_READECC(mtd, args...) (*(mtd->read_ecc))(mtd, args)
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#define MTD_WRITEECC(mtd, args...) (*(mtd->write_ecc))(mtd, args)
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#define MTD_READOOB(mtd, args...) (*(mtd->read_oob))(mtd, args)
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#define MTD_WRITEOOB(mtd, args...) (*(mtd->write_oob))(mtd, args)
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#define MTD_SYNC(mtd) do { if (mtd->sync) (*(mtd->sync))(mtd); } while (0)
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#ifdef CONFIG_MTD_PARTITIONS
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void mtd_erase_callback(struct erase_info *instr);
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#else
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static inline void mtd_erase_callback(struct erase_info *instr)
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{
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if (instr->callback)
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instr->callback(instr);
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}
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#endif
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/*
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* Debugging macro and defines
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*/
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#define MTD_DEBUG_LEVEL0 (0) /* Quiet */
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#define MTD_DEBUG_LEVEL1 (1) /* Audible */
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#define MTD_DEBUG_LEVEL2 (2) /* Loud */
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#define MTD_DEBUG_LEVEL3 (3) /* Noisy */
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#ifdef CONFIG_MTD_DEBUG
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#define DEBUG(n, args...) \
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do { \
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if (n <= CONFIG_MTD_DEBUG_VERBOSE) \
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printk(KERN_INFO args); \
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} while(0)
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#else /* CONFIG_MTD_DEBUG */
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#define DEBUG(n, args...) do { } while(0)
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#endif /* CONFIG_MTD_DEBUG */
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#endif /* __MTD_MTD_H__ */
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