drivers/mtd/ubi/debug.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (c) International Business Machines Corp., 2006
   4  *
   5  * Author: Artem Bityutskiy (Битюцкий Артём)
   6  */
   7
   8 #ifndef __UBI_DEBUG_H__
   9 #define __UBI_DEBUG_H__
  10
  11 void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len);
  12 void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr);
  13 void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr);
  14
  15 #include <linux/random.h>
  16
  17 #define ubi_assert(expr)  do {                                               \
  18         if (unlikely(!(expr))) {                                             \
  19                 pr_crit("UBI assert failed in %s at %u (pid %d)\n",          \
  20                        __func__, __LINE__, current->pid);                    \
  21                 dump_stack();                                                \
  22         }                                                                    \
  23 } while (0)
  24
  25 #define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a)                   \
  26                 print_hex_dump(l, ps, pt, r, g, b, len, a)
  27
  28 #define ubi_dbg_msg(type, fmt, ...) \
  29         pr_debug("UBI DBG " type " (pid %d): " fmt "\n", current->pid,       \
  30                  ##__VA_ARGS__)
  31
  32 /* General debugging messages */
  33 #define dbg_gen(fmt, ...) ubi_dbg_msg("gen", fmt, ##__VA_ARGS__)
  34 /* Messages from the eraseblock association sub-system */
  35 #define dbg_eba(fmt, ...) ubi_dbg_msg("eba", fmt, ##__VA_ARGS__)
  36 /* Messages from the wear-leveling sub-system */
  37 #define dbg_wl(fmt, ...)  ubi_dbg_msg("wl", fmt, ##__VA_ARGS__)
  38 /* Messages from the input/output sub-system */
  39 #define dbg_io(fmt, ...)  ubi_dbg_msg("io", fmt, ##__VA_ARGS__)
  40 /* Initialization and build messages */
  41 #define dbg_bld(fmt, ...) ubi_dbg_msg("bld", fmt, ##__VA_ARGS__)
  42
  43 void ubi_dump_vol_info(const struct ubi_volume *vol);
  44 void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx);
  45 void ubi_dump_av(const struct ubi_ainf_volume *av);
  46 void ubi_dump_aeb(const struct ubi_ainf_peb *aeb, int type);
  47 void ubi_dump_mkvol_req(const struct ubi_mkvol_req *req);
  48 int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset,
  49                           int len);
  50 int ubi_debugfs_init(void);
  51 void ubi_debugfs_exit(void);
  52 int ubi_debugfs_init_dev(struct ubi_device *ubi);
  53 void ubi_debugfs_exit_dev(struct ubi_device *ubi);
  54
  55 /**
  56  * ubi_dbg_is_bgt_disabled - if the background thread is disabled.
  57  * @ubi: UBI device description object
  58  *
  59  * Returns non-zero if the UBI background thread is disabled for testing
  60  * purposes.
  61  */
  62 static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi)
  63 {
  64         return ubi->dbg.disable_bgt;
  65 }
  66
  67 /**
  68  * ubi_dbg_is_bitflip - if it is time to emulate a bit-flip.
  69  * @ubi: UBI device description object
  70  *
  71  * Returns non-zero if a bit-flip should be emulated, otherwise returns zero.
  72  */
  73 static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi)
  74 {
  75         if (ubi->dbg.emulate_bitflips)
  76                 return !(prandom_u32() % 200);
  77         return 0;
  78 }
  79
  80 /**
  81  * ubi_dbg_is_write_failure - if it is time to emulate a write failure.
  82  * @ubi: UBI device description object
  83  *
  84  * Returns non-zero if a write failure should be emulated, otherwise returns
  85  * zero.
  86  */
  87 static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi)
  88 {
  89         if (ubi->dbg.emulate_io_failures)
  90                 return !(prandom_u32() % 500);
  91         return 0;
  92 }
  93
  94 /**
  95  * ubi_dbg_is_erase_failure - if its time to emulate an erase failure.
  96  * @ubi: UBI device description object
  97  *
  98  * Returns non-zero if an erase failure should be emulated, otherwise returns
  99  * zero.
 100  */
 101 static inline int ubi_dbg_is_erase_failure(const struct ubi_device *ubi)
 102 {
 103         if (ubi->dbg.emulate_io_failures)
 104                 return !(prandom_u32() % 400);
 105         return 0;
 106 }
 107
 108 static inline int ubi_dbg_chk_io(const struct ubi_device *ubi)
 109 {
 110         return ubi->dbg.chk_io;
 111 }
 112
 113 static inline int ubi_dbg_chk_gen(const struct ubi_device *ubi)
 114 {
 115         return ubi->dbg.chk_gen;
 116 }
 117
 118 static inline int ubi_dbg_chk_fastmap(const struct ubi_device *ubi)
 119 {
 120         return ubi->dbg.chk_fastmap;
 121 }
 122
 123 static inline void ubi_enable_dbg_chk_fastmap(struct ubi_device *ubi)
 124 {
 125         ubi->dbg.chk_fastmap = 1;
 126 }
 127
 128 int ubi_dbg_power_cut(struct ubi_device *ubi, int caller);
 129 #endif /* !__UBI_DEBUG_H__ */