drivers/mtd/ubi/debug.h

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