xref: /openbmc/u-boot/drivers/mtd/ubi/debug.h (revision 413ab5b0)
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 #ifndef __UBOOT__
17 #include <linux/random.h>
18 #endif
19 
20 #define ubi_assert(expr)  do {                                               \
21 	if (unlikely(!(expr))) {                                             \
22 		pr_crit("UBI assert failed in %s at %u (pid %d)\n",          \
23 		       __func__, __LINE__, current->pid);                    \
24 		dump_stack();                                                \
25 	}                                                                    \
26 } while (0)
27 
28 #define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a)                   \
29 		print_hex_dump(l, ps, pt, r, g, b, len, a)
30 
31 #define ubi_dbg_msg(type, fmt, ...) \
32 	pr_debug("UBI DBG " type " (pid %d): " fmt "\n", current->pid,       \
33 		 ##__VA_ARGS__)
34 
35 /* General debugging messages */
36 #define dbg_gen(fmt, ...) ubi_dbg_msg("gen", fmt, ##__VA_ARGS__)
37 /* Messages from the eraseblock association sub-system */
38 #define dbg_eba(fmt, ...) ubi_dbg_msg("eba", fmt, ##__VA_ARGS__)
39 /* Messages from the wear-leveling sub-system */
40 #define dbg_wl(fmt, ...)  ubi_dbg_msg("wl", fmt, ##__VA_ARGS__)
41 /* Messages from the input/output sub-system */
42 #define dbg_io(fmt, ...)  ubi_dbg_msg("io", fmt, ##__VA_ARGS__)
43 /* Initialization and build messages */
44 #define dbg_bld(fmt, ...) ubi_dbg_msg("bld", fmt, ##__VA_ARGS__)
45 
46 void ubi_dump_vol_info(const struct ubi_volume *vol);
47 void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx);
48 void ubi_dump_av(const struct ubi_ainf_volume *av);
49 void ubi_dump_aeb(const struct ubi_ainf_peb *aeb, int type);
50 void ubi_dump_mkvol_req(const struct ubi_mkvol_req *req);
51 int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset,
52 			  int len);
53 int ubi_debugfs_init(void);
54 void ubi_debugfs_exit(void);
55 int ubi_debugfs_init_dev(struct ubi_device *ubi);
56 void ubi_debugfs_exit_dev(struct ubi_device *ubi);
57 
58 /**
59  * ubi_dbg_is_bgt_disabled - if the background thread is disabled.
60  * @ubi: UBI device description object
61  *
62  * Returns non-zero if the UBI background thread is disabled for testing
63  * purposes.
64  */
65 static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi)
66 {
67 	return ubi->dbg.disable_bgt;
68 }
69 
70 /**
71  * ubi_dbg_is_bitflip - if it is time to emulate a bit-flip.
72  * @ubi: UBI device description object
73  *
74  * Returns non-zero if a bit-flip should be emulated, otherwise returns zero.
75  */
76 static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi)
77 {
78 	if (ubi->dbg.emulate_bitflips)
79 		return !(prandom_u32() % 200);
80 	return 0;
81 }
82 
83 /**
84  * ubi_dbg_is_write_failure - if it is time to emulate a write failure.
85  * @ubi: UBI device description object
86  *
87  * Returns non-zero if a write failure should be emulated, otherwise returns
88  * zero.
89  */
90 static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi)
91 {
92 	if (ubi->dbg.emulate_io_failures)
93 		return !(prandom_u32() % 500);
94 	return 0;
95 }
96 
97 /**
98  * ubi_dbg_is_erase_failure - if its time to emulate an erase failure.
99  * @ubi: UBI device description object
100  *
101  * Returns non-zero if an erase failure should be emulated, otherwise returns
102  * zero.
103  */
104 static inline int ubi_dbg_is_erase_failure(const struct ubi_device *ubi)
105 {
106 	if (ubi->dbg.emulate_io_failures)
107 		return !(prandom_u32() % 400);
108 	return 0;
109 }
110 
111 static inline int ubi_dbg_chk_io(const struct ubi_device *ubi)
112 {
113 	return ubi->dbg.chk_io;
114 }
115 
116 static inline int ubi_dbg_chk_gen(const struct ubi_device *ubi)
117 {
118 	return ubi->dbg.chk_gen;
119 }
120 
121 static inline int ubi_dbg_chk_fastmap(const struct ubi_device *ubi)
122 {
123 	return ubi->dbg.chk_fastmap;
124 }
125 
126 static inline void ubi_enable_dbg_chk_fastmap(struct ubi_device *ubi)
127 {
128 	ubi->dbg.chk_fastmap = 1;
129 }
130 
131 int ubi_dbg_power_cut(struct ubi_device *ubi, int caller);
132 #endif /* !__UBI_DEBUG_H__ */
133