Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Overview: |
| 4 | * Bad block table support for the NAND driver |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 5 | * |
Fabio Estevam | d159c4e | 2012-07-28 19:29:25 -0300 | [diff] [blame] | 6 | * Copyright © 2004 Thomas Gleixner (tglx@linutronix.de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * Description: |
| 9 | * |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 10 | * When nand_scan_bbt is called, then it tries to find the bad block table |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 11 | * depending on the options in the BBT descriptor(s). If no flash based BBT |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 12 | * (NAND_BBT_USE_FLASH) is specified then the device is scanned for factory |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 13 | * marked good / bad blocks. This information is used to create a memory BBT. |
| 14 | * Once a new bad block is discovered then the "factory" information is updated |
| 15 | * on the device. |
| 16 | * If a flash based BBT is specified then the function first tries to find the |
| 17 | * BBT on flash. If a BBT is found then the contents are read and the memory |
| 18 | * based BBT is created. If a mirrored BBT is selected then the mirror is |
| 19 | * searched too and the versions are compared. If the mirror has a greater |
Huang Shijie | 44ed0ff | 2012-07-03 16:44:15 +0800 | [diff] [blame] | 20 | * version number, then the mirror BBT is used to build the memory based BBT. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | * If the tables are not versioned, then we "or" the bad block information. |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 22 | * If one of the BBTs is out of date or does not exist it is (re)created. |
| 23 | * If no BBT exists at all then the device is scanned for factory marked |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 24 | * good / bad blocks and the bad block tables are created. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | * |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 26 | * For manufacturer created BBTs like the one found on M-SYS DOC devices |
| 27 | * the BBT is searched and read but never created |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | * |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 29 | * The auto generated bad block table is located in the last good blocks |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 30 | * of the device. The table is mirrored, so it can be updated eventually. |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 31 | * The table is marked in the OOB area with an ident pattern and a version |
| 32 | * number which indicates which of both tables is more up to date. If the NAND |
| 33 | * controller needs the complete OOB area for the ECC information then the |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 34 | * option NAND_BBT_NO_OOB should be used (along with NAND_BBT_USE_FLASH, of |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 35 | * course): it moves the ident pattern and the version byte into the data area |
| 36 | * and the OOB area will remain untouched. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | * |
| 38 | * The table uses 2 bits per block |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 39 | * 11b: block is good |
| 40 | * 00b: block is factory marked bad |
| 41 | * 01b, 10b: block is marked bad due to wear |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | * |
| 43 | * The memory bad block table uses the following scheme: |
| 44 | * 00b: block is good |
| 45 | * 01b: block is marked bad due to wear |
| 46 | * 10b: block is reserved (to protect the bbt area) |
| 47 | * 11b: block is factory marked bad |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 48 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | * Multichip devices like DOC store the bad block info per floor. |
| 50 | * |
| 51 | * Following assumptions are made: |
| 52 | * - bbts start at a page boundary, if autolocated on a block boundary |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 53 | * - the space necessary for a bbt in FLASH does not exceed a block boundary |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | */ |
| 55 | |
| 56 | #include <linux/slab.h> |
| 57 | #include <linux/types.h> |
| 58 | #include <linux/mtd/mtd.h> |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 59 | #include <linux/mtd/bbm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #include <linux/bitops.h> |
| 61 | #include <linux/delay.h> |
David Woodhouse | c3f8abf | 2006-05-13 04:03:42 +0100 | [diff] [blame] | 62 | #include <linux/vmalloc.h> |
Paul Gortmaker | f3bcc01 | 2011-07-10 12:43:28 -0400 | [diff] [blame] | 63 | #include <linux/export.h> |
Brian Norris | 491ed06 | 2012-06-22 16:35:44 -0700 | [diff] [blame] | 64 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Boris Brezillon | 348d56a | 2018-09-07 00:38:48 +0200 | [diff] [blame] | 66 | #include "internals.h" |
| 67 | |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 68 | #define BBT_BLOCK_GOOD 0x00 |
| 69 | #define BBT_BLOCK_WORN 0x01 |
| 70 | #define BBT_BLOCK_RESERVED 0x02 |
| 71 | #define BBT_BLOCK_FACTORY_BAD 0x03 |
| 72 | |
| 73 | #define BBT_ENTRY_MASK 0x03 |
| 74 | #define BBT_ENTRY_SHIFT 2 |
| 75 | |
| 76 | static inline uint8_t bbt_get_entry(struct nand_chip *chip, int block) |
| 77 | { |
| 78 | uint8_t entry = chip->bbt[block >> BBT_ENTRY_SHIFT]; |
| 79 | entry >>= (block & BBT_ENTRY_MASK) * 2; |
| 80 | return entry & BBT_ENTRY_MASK; |
| 81 | } |
| 82 | |
| 83 | static inline void bbt_mark_entry(struct nand_chip *chip, int block, |
| 84 | uint8_t mark) |
| 85 | { |
| 86 | uint8_t msk = (mark & BBT_ENTRY_MASK) << ((block & BBT_ENTRY_MASK) * 2); |
| 87 | chip->bbt[block >> BBT_ENTRY_SHIFT] |= msk; |
| 88 | } |
| 89 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 90 | static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td) |
| 91 | { |
Brian Norris | 718894a | 2012-06-22 16:35:43 -0700 | [diff] [blame] | 92 | if (memcmp(buf, td->pattern, td->len)) |
| 93 | return -1; |
| 94 | return 0; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 95 | } |
| 96 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 97 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | * check_pattern - [GENERIC] check if a pattern is in the buffer |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 99 | * @buf: the buffer to search |
| 100 | * @len: the length of buffer to search |
| 101 | * @paglen: the pagelength |
| 102 | * @td: search pattern descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 104 | * Check for a pattern at the given place. Used to search bad block tables and |
Brian Norris | dad2256 | 2013-07-30 17:53:00 -0700 | [diff] [blame] | 105 | * good / bad block identifiers. |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 106 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 107 | static int check_pattern(uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 109 | if (td->options & NAND_BBT_NO_OOB) |
| 110 | return check_pattern_no_oob(buf, td); |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | /* Compare the pattern */ |
Brian Norris | dad2256 | 2013-07-30 17:53:00 -0700 | [diff] [blame] | 113 | if (memcmp(buf + paglen + td->offs, td->pattern, td->len)) |
Brian Norris | 75b66d8 | 2011-09-07 13:13:41 -0700 | [diff] [blame] | 114 | return -1; |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | return 0; |
| 117 | } |
| 118 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 119 | /** |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 120 | * check_short_pattern - [GENERIC] check if a pattern is in the buffer |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 121 | * @buf: the buffer to search |
| 122 | * @td: search pattern descriptor |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 123 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 124 | * Check for a pattern at the given place. Used to search bad block tables and |
| 125 | * good / bad block identifiers. Same as check_pattern, but no optional empty |
| 126 | * check. |
| 127 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 128 | static int check_short_pattern(uint8_t *buf, struct nand_bbt_descr *td) |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 129 | { |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 130 | /* Compare the pattern */ |
Brian Norris | 491ed06 | 2012-06-22 16:35:44 -0700 | [diff] [blame] | 131 | if (memcmp(buf + td->offs, td->pattern, td->len)) |
| 132 | return -1; |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 133 | return 0; |
| 134 | } |
| 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | /** |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 137 | * add_marker_len - compute the length of the marker in data area |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 138 | * @td: BBT descriptor used for computation |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 139 | * |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 140 | * The length will be 0 if the marker is located in OOB area. |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 141 | */ |
| 142 | static u32 add_marker_len(struct nand_bbt_descr *td) |
| 143 | { |
| 144 | u32 len; |
| 145 | |
| 146 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 147 | return 0; |
| 148 | |
| 149 | len = td->len; |
| 150 | if (td->options & NAND_BBT_VERSION) |
| 151 | len++; |
| 152 | return len; |
| 153 | } |
| 154 | |
| 155 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | * read_bbt - [GENERIC] Read the bad block table starting from page |
Randy Dunlap | 455e7b3 | 2019-01-27 18:21:42 -0800 | [diff] [blame] | 157 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 158 | * @buf: temporary buffer |
| 159 | * @page: the starting page |
| 160 | * @num: the number of bbt descriptors to read |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 161 | * @td: the bbt describtion table |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 162 | * @offs: block number offset in the table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | * |
| 164 | * Read the bad block table starting from page. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 166 | static int read_bbt(struct nand_chip *this, uint8_t *buf, int page, int num, |
| 167 | struct nand_bbt_descr *td, int offs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 169 | struct mtd_info *mtd = nand_to_mtd(this); |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 170 | int res, ret = 0, i, j, act = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | size_t retlen, len, totlen; |
| 172 | loff_t from; |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 173 | int bits = td->options & NAND_BBT_NRBITS_MSK; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 174 | uint8_t msk = (uint8_t)((1 << bits) - 1); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 175 | u32 marker_len; |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 176 | int reserved_block_code = td->reserved_block_code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
| 178 | totlen = (num * bits) >> 3; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 179 | marker_len = add_marker_len(td); |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 180 | from = ((loff_t)page) << this->page_shift; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | while (totlen) { |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 183 | len = min(totlen, (size_t)(1 << this->bbt_erase_shift)); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 184 | if (marker_len) { |
| 185 | /* |
| 186 | * In case the BBT marker is not in the OOB area it |
| 187 | * will be just in the first page. |
| 188 | */ |
| 189 | len -= marker_len; |
| 190 | from += marker_len; |
| 191 | marker_len = 0; |
| 192 | } |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 193 | res = mtd_read(mtd, from, len, &retlen, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | if (res < 0) { |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 195 | if (mtd_is_eccerr(res)) { |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 196 | pr_info("nand_bbt: ECC error in BBT at 0x%012llx\n", |
| 197 | from & ~mtd->writesize); |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 198 | return res; |
| 199 | } else if (mtd_is_bitflip(res)) { |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 200 | pr_info("nand_bbt: corrected error in BBT at 0x%012llx\n", |
| 201 | from & ~mtd->writesize); |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 202 | ret = res; |
| 203 | } else { |
| 204 | pr_info("nand_bbt: error reading BBT\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | return res; |
| 206 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 207 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
| 209 | /* Analyse data */ |
| 210 | for (i = 0; i < len; i++) { |
| 211 | uint8_t dat = buf[i]; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 212 | for (j = 0; j < 8; j += bits, act++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | uint8_t tmp = (dat >> j) & msk; |
| 214 | if (tmp == msk) |
| 215 | continue; |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 216 | if (reserved_block_code && (tmp == reserved_block_code)) { |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 217 | pr_info("nand_read_bbt: reserved block at 0x%012llx\n", |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 218 | (loff_t)(offs + act) << |
| 219 | this->bbt_erase_shift); |
| 220 | bbt_mark_entry(this, offs + act, |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 221 | BBT_BLOCK_RESERVED); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 222 | mtd->ecc_stats.bbtblocks++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | continue; |
| 224 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 225 | /* |
| 226 | * Leave it for now, if it's matured we can |
Brian Norris | a0f5080 | 2011-07-19 10:06:06 -0700 | [diff] [blame] | 227 | * move this message to pr_debug. |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 228 | */ |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 229 | pr_info("nand_read_bbt: bad block at 0x%012llx\n", |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 230 | (loff_t)(offs + act) << |
| 231 | this->bbt_erase_shift); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 232 | /* Factory marked bad or worn out? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | if (tmp == 0) |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 234 | bbt_mark_entry(this, offs + act, |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 235 | BBT_BLOCK_FACTORY_BAD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | else |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 237 | bbt_mark_entry(this, offs + act, |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 238 | BBT_BLOCK_WORN); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 239 | mtd->ecc_stats.badblocks++; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 240 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | totlen -= len; |
| 243 | from += len; |
| 244 | } |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 245 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | /** |
| 249 | * read_abs_bbt - [GENERIC] Read the bad block table starting at a given page |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 250 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 251 | * @buf: temporary buffer |
| 252 | * @td: descriptor for the bad block table |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 253 | * @chip: read the table for a specific chip, -1 read all chips; applies only if |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 254 | * NAND_BBT_PERCHIP option is set |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 256 | * Read the bad block table for all chips starting at a given page. We assume |
| 257 | * that the bbt bits are in consecutive order. |
| 258 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 259 | static int read_abs_bbt(struct nand_chip *this, uint8_t *buf, |
| 260 | struct nand_bbt_descr *td, int chip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 262 | struct mtd_info *mtd = nand_to_mtd(this); |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 263 | u64 targetsize = nanddev_target_size(&this->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | int res = 0, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | if (td->options & NAND_BBT_PERCHIP) { |
| 267 | int offs = 0; |
Boris Brezillon | 32813e2 | 2018-10-29 11:58:29 +0100 | [diff] [blame] | 268 | for (i = 0; i < nanddev_ntargets(&this->base); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | if (chip == -1 || chip == i) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 270 | res = read_bbt(this, buf, td->pages[i], |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 271 | targetsize >> this->bbt_erase_shift, |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 272 | td, offs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | if (res) |
| 274 | return res; |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 275 | offs += targetsize >> this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | } else { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 278 | res = read_bbt(this, buf, td->pages[0], |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 279 | mtd->size >> this->bbt_erase_shift, td, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | if (res) |
| 281 | return res; |
| 282 | } |
| 283 | return 0; |
| 284 | } |
| 285 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 286 | /* BBT marker is in the first page, no OOB */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 287 | static int scan_read_data(struct nand_chip *this, uint8_t *buf, loff_t offs, |
| 288 | struct nand_bbt_descr *td) |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 289 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 290 | struct mtd_info *mtd = nand_to_mtd(this); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 291 | size_t retlen; |
| 292 | size_t len; |
| 293 | |
| 294 | len = td->len; |
| 295 | if (td->options & NAND_BBT_VERSION) |
| 296 | len++; |
| 297 | |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 298 | return mtd_read(mtd, offs, len, &retlen, buf); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 299 | } |
| 300 | |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 301 | /** |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 302 | * scan_read_oob - [GENERIC] Scan data+OOB region to buffer |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 303 | * @this: NAND chip object |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 304 | * @buf: temporary buffer |
| 305 | * @offs: offset at which to scan |
| 306 | * @len: length of data region to read |
| 307 | * |
| 308 | * Scan read data from data+OOB. May traverse multiple pages, interleaving |
| 309 | * page,OOB,page,OOB,... in buf. Completes transfer and returns the "strongest" |
| 310 | * ECC condition (error or bitflip). May quit on the first (non-ECC) error. |
| 311 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 312 | static int scan_read_oob(struct nand_chip *this, uint8_t *buf, loff_t offs, |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 313 | size_t len) |
| 314 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 315 | struct mtd_info *mtd = nand_to_mtd(this); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 316 | struct mtd_oob_ops ops; |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 317 | int res, ret = 0; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 318 | |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 319 | ops.mode = MTD_OPS_PLACE_OOB; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 320 | ops.ooboffs = 0; |
| 321 | ops.ooblen = mtd->oobsize; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 322 | |
Maxim Levitsky | b64d39d | 2010-02-22 20:39:37 +0200 | [diff] [blame] | 323 | while (len > 0) { |
Brian Norris | 105513c | 2011-09-07 13:13:28 -0700 | [diff] [blame] | 324 | ops.datbuf = buf; |
| 325 | ops.len = min(len, (size_t)mtd->writesize); |
| 326 | ops.oobbuf = buf + ops.len; |
Maxim Levitsky | b64d39d | 2010-02-22 20:39:37 +0200 | [diff] [blame] | 327 | |
Artem Bityutskiy | fd2819b | 2011-12-23 18:27:05 +0200 | [diff] [blame] | 328 | res = mtd_read_oob(mtd, offs, &ops); |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 329 | if (res) { |
| 330 | if (!mtd_is_bitflip_or_eccerr(res)) |
| 331 | return res; |
| 332 | else if (mtd_is_eccerr(res) || !ret) |
| 333 | ret = res; |
| 334 | } |
Maxim Levitsky | b64d39d | 2010-02-22 20:39:37 +0200 | [diff] [blame] | 335 | |
| 336 | buf += mtd->oobsize + mtd->writesize; |
| 337 | len -= mtd->writesize; |
Dmitry Maluka | 34a5704 | 2012-05-11 20:51:51 +0300 | [diff] [blame] | 338 | offs += mtd->writesize; |
Maxim Levitsky | b64d39d | 2010-02-22 20:39:37 +0200 | [diff] [blame] | 339 | } |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 340 | return ret; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 341 | } |
| 342 | |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 343 | static int scan_read(struct nand_chip *this, uint8_t *buf, loff_t offs, |
| 344 | size_t len, struct nand_bbt_descr *td) |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 345 | { |
| 346 | if (td->options & NAND_BBT_NO_OOB) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 347 | return scan_read_data(this, buf, offs, td); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 348 | else |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 349 | return scan_read_oob(this, buf, offs, len); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 350 | } |
| 351 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 352 | /* Scan write data with oob to flash */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 353 | static int scan_write_bbt(struct nand_chip *this, loff_t offs, size_t len, |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 354 | uint8_t *buf, uint8_t *oob) |
| 355 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 356 | struct mtd_info *mtd = nand_to_mtd(this); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 357 | struct mtd_oob_ops ops; |
| 358 | |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 359 | ops.mode = MTD_OPS_PLACE_OOB; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 360 | ops.ooboffs = 0; |
| 361 | ops.ooblen = mtd->oobsize; |
| 362 | ops.datbuf = buf; |
| 363 | ops.oobbuf = oob; |
| 364 | ops.len = len; |
| 365 | |
Artem Bityutskiy | a2cc5ba | 2011-12-23 18:29:55 +0200 | [diff] [blame] | 366 | return mtd_write_oob(mtd, offs, &ops); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 367 | } |
| 368 | |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 369 | static u32 bbt_get_ver_offs(struct nand_chip *this, struct nand_bbt_descr *td) |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 370 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 371 | struct mtd_info *mtd = nand_to_mtd(this); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 372 | u32 ver_offs = td->veroffs; |
| 373 | |
| 374 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 375 | ver_offs += mtd->writesize; |
| 376 | return ver_offs; |
| 377 | } |
| 378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | /** |
| 380 | * read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 381 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 382 | * @buf: temporary buffer |
| 383 | * @td: descriptor for the bad block table |
| 384 | * @md: descriptor for the bad block table mirror |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 386 | * Read the bad block table(s) for all chips starting at a given page. We |
| 387 | * assume that the bbt bits are in consecutive order. |
| 388 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 389 | static void read_abs_bbts(struct nand_chip *this, uint8_t *buf, |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 390 | struct nand_bbt_descr *td, struct nand_bbt_descr *md) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 392 | struct mtd_info *mtd = nand_to_mtd(this); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 394 | /* Read the primary version, if available */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | if (td->options & NAND_BBT_VERSION) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 396 | scan_read(this, buf, (loff_t)td->pages[0] << this->page_shift, |
| 397 | mtd->writesize, td); |
| 398 | td->version[0] = buf[bbt_get_ver_offs(this, td)]; |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 399 | pr_info("Bad block table at page %d, version 0x%02X\n", |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 400 | td->pages[0], td->version[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 403 | /* Read the mirror version, if available */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | if (md && (md->options & NAND_BBT_VERSION)) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 405 | scan_read(this, buf, (loff_t)md->pages[0] << this->page_shift, |
| 406 | mtd->writesize, md); |
| 407 | md->version[0] = buf[bbt_get_ver_offs(this, md)]; |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 408 | pr_info("Bad block table at page %d, version 0x%02X\n", |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 409 | md->pages[0], md->version[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 413 | /* Scan a given block partially */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 414 | static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd, |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 415 | loff_t offs, uint8_t *buf) |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 416 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 417 | struct mtd_info *mtd = nand_to_mtd(this); |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 418 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 419 | struct mtd_oob_ops ops; |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 420 | int ret, page_offset; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 421 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 422 | ops.ooblen = mtd->oobsize; |
| 423 | ops.oobbuf = buf; |
| 424 | ops.ooboffs = 0; |
| 425 | ops.datbuf = NULL; |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 426 | ops.mode = MTD_OPS_PLACE_OOB; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 427 | |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 428 | page_offset = nand_bbm_get_next_page(this, 0); |
| 429 | |
| 430 | while (page_offset >= 0) { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 431 | /* |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 432 | * Read the full oob until read_oob is fixed to handle single |
| 433 | * byte reads for 16 bit buswidth. |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 434 | */ |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 435 | ret = mtd_read_oob(mtd, offs + (page_offset * mtd->writesize), |
| 436 | &ops); |
Brian Norris | 903cd06 | 2011-06-28 16:28:58 -0700 | [diff] [blame] | 437 | /* Ignore ECC errors when checking for BBM */ |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 438 | if (ret && !mtd_is_bitflip_or_eccerr(ret)) |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 439 | return ret; |
| 440 | |
| 441 | if (check_short_pattern(buf, bd)) |
| 442 | return 1; |
| 443 | |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 444 | page_offset = nand_bbm_get_next_page(this, page_offset + 1); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 445 | } |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 446 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 447 | return 0; |
| 448 | } |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | /** |
| 451 | * create_bbt - [GENERIC] Create a bad block table by scanning the device |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 452 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 453 | * @buf: temporary buffer |
| 454 | * @bd: descriptor for the good/bad block search pattern |
| 455 | * @chip: create the table for a specific chip, -1 read all chips; applies only |
| 456 | * if NAND_BBT_PERCHIP option is set |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 458 | * Create a bad block table by scanning the device for the given good/bad block |
| 459 | * identify pattern. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 461 | static int create_bbt(struct nand_chip *this, uint8_t *buf, |
| 462 | struct nand_bbt_descr *bd, int chip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 464 | u64 targetsize = nanddev_target_size(&this->base); |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 465 | struct mtd_info *mtd = nand_to_mtd(this); |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 466 | int i, numblocks, startblock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | loff_t from; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 469 | pr_info("Scanning device for bad blocks\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | if (chip == -1) { |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 472 | numblocks = mtd->size >> this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | startblock = 0; |
| 474 | from = 0; |
| 475 | } else { |
Boris Brezillon | 32813e2 | 2018-10-29 11:58:29 +0100 | [diff] [blame] | 476 | if (chip >= nanddev_ntargets(&this->base)) { |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 477 | pr_warn("create_bbt(): chipnr (%d) > available chips (%d)\n", |
Boris Brezillon | 32813e2 | 2018-10-29 11:58:29 +0100 | [diff] [blame] | 478 | chip + 1, nanddev_ntargets(&this->base)); |
Artem B. Bityuckiy | 171650a | 2005-02-16 17:09:39 +0000 | [diff] [blame] | 479 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | } |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 481 | numblocks = targetsize >> this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | startblock = chip * numblocks; |
| 483 | numblocks += startblock; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 484 | from = (loff_t)startblock << this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 486 | |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 487 | for (i = startblock; i < numblocks; i++) { |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 488 | int ret; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 489 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 490 | BUG_ON(bd->options & NAND_BBT_NO_OOB); |
| 491 | |
Frieder Schrempf | f90da78 | 2019-04-17 12:36:37 +0000 | [diff] [blame] | 492 | ret = scan_block_fast(this, bd, from, buf); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 493 | if (ret < 0) |
| 494 | return ret; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 495 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 496 | if (ret) { |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 497 | bbt_mark_entry(this, i, BBT_BLOCK_FACTORY_BAD); |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 498 | pr_warn("Bad eraseblock %d at 0x%012llx\n", |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 499 | i, (unsigned long long)from); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 500 | mtd->ecc_stats.badblocks++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | from += (1 << this->bbt_erase_shift); |
| 504 | } |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 505 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | /** |
| 509 | * search_bbt - [GENERIC] scan the device for a specific bad block table |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 510 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 511 | * @buf: temporary buffer |
| 512 | * @td: descriptor for the bad block table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 514 | * Read the bad block table by searching for a given ident pattern. Search is |
| 515 | * preformed either from the beginning up or from the end of the device |
| 516 | * downwards. The search starts always at the start of a block. If the option |
| 517 | * NAND_BBT_PERCHIP is given, each chip is searched for a bbt, which contains |
| 518 | * the bad block information of this chip. This is necessary to provide support |
| 519 | * for certain DOC devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 521 | * The bbt ident pattern resides in the oob area of the first page in a block. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 523 | static int search_bbt(struct nand_chip *this, uint8_t *buf, |
| 524 | struct nand_bbt_descr *td) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | { |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 526 | u64 targetsize = nanddev_target_size(&this->base); |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 527 | struct mtd_info *mtd = nand_to_mtd(this); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | int i, chips; |
Brian Norris | 930de53 | 2014-01-02 17:14:10 -0800 | [diff] [blame] | 529 | int startblock, block, dir; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 530 | int scanlen = mtd->writesize + mtd->oobsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | int bbtblocks; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 532 | int blocktopage = this->bbt_erase_shift - this->page_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 534 | /* Search direction top -> down? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | if (td->options & NAND_BBT_LASTBLOCK) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 536 | startblock = (mtd->size >> this->bbt_erase_shift) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | dir = -1; |
| 538 | } else { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 539 | startblock = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | dir = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 541 | } |
| 542 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 543 | /* Do we have a bbt per chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | if (td->options & NAND_BBT_PERCHIP) { |
Boris Brezillon | 32813e2 | 2018-10-29 11:58:29 +0100 | [diff] [blame] | 545 | chips = nanddev_ntargets(&this->base); |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 546 | bbtblocks = targetsize >> this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | startblock &= bbtblocks - 1; |
| 548 | } else { |
| 549 | chips = 1; |
| 550 | bbtblocks = mtd->size >> this->bbt_erase_shift; |
| 551 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 552 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | for (i = 0; i < chips; i++) { |
| 554 | /* Reset version information */ |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 555 | td->version[i] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | td->pages[i] = -1; |
| 557 | /* Scan the maximum number of blocks */ |
| 558 | for (block = 0; block < td->maxblocks; block++) { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | int actblock = startblock + dir * block; |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 561 | loff_t offs = (loff_t)actblock << this->bbt_erase_shift; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | /* Read first page */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 564 | scan_read(this, buf, offs, mtd->writesize, td); |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 565 | if (!check_pattern(buf, scanlen, mtd->writesize, td)) { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 566 | td->pages[i] = actblock << blocktopage; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | if (td->options & NAND_BBT_VERSION) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 568 | offs = bbt_get_ver_offs(this, td); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 569 | td->version[i] = buf[offs]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | } |
| 571 | break; |
| 572 | } |
| 573 | } |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 574 | startblock += targetsize >> this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | } |
| 576 | /* Check, if we found a bbt for each requested chip */ |
| 577 | for (i = 0; i < chips; i++) { |
| 578 | if (td->pages[i] == -1) |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 579 | pr_warn("Bad block table not found for chip %d\n", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | else |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 581 | pr_info("Bad block table found at page %d, version 0x%02X\n", |
| 582 | td->pages[i], td->version[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 584 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | /** |
| 588 | * search_read_bbts - [GENERIC] scan the device for bad block table(s) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 589 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 590 | * @buf: temporary buffer |
| 591 | * @td: descriptor for the bad block table |
| 592 | * @md: descriptor for the bad block table mirror |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 594 | * Search and read the bad block table(s). |
| 595 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 596 | static void search_read_bbts(struct nand_chip *this, uint8_t *buf, |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 597 | struct nand_bbt_descr *td, |
| 598 | struct nand_bbt_descr *md) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | { |
| 600 | /* Search the primary table */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 601 | search_bbt(this, buf, td); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | /* Search the mirror table */ |
| 604 | if (md) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 605 | search_bbt(this, buf, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 606 | } |
| 607 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 608 | /** |
Boris Brezillon | c3baf27 | 2016-08-15 18:22:01 -0500 | [diff] [blame] | 609 | * get_bbt_block - Get the first valid eraseblock suitable to store a BBT |
| 610 | * @this: the NAND device |
| 611 | * @td: the BBT description |
| 612 | * @md: the mirror BBT descriptor |
| 613 | * @chip: the CHIP selector |
| 614 | * |
| 615 | * This functions returns a positive block number pointing a valid eraseblock |
| 616 | * suitable to store a BBT (i.e. in the range reserved for BBT), or -ENOSPC if |
| 617 | * all blocks are already used of marked bad. If td->pages[chip] was already |
| 618 | * pointing to a valid block we re-use it, otherwise we search for the next |
| 619 | * valid one. |
| 620 | */ |
| 621 | static int get_bbt_block(struct nand_chip *this, struct nand_bbt_descr *td, |
| 622 | struct nand_bbt_descr *md, int chip) |
| 623 | { |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 624 | u64 targetsize = nanddev_target_size(&this->base); |
Boris Brezillon | c3baf27 | 2016-08-15 18:22:01 -0500 | [diff] [blame] | 625 | int startblock, dir, page, numblocks, i; |
| 626 | |
| 627 | /* |
| 628 | * There was already a version of the table, reuse the page. This |
| 629 | * applies for absolute placement too, as we have the page number in |
| 630 | * td->pages. |
| 631 | */ |
| 632 | if (td->pages[chip] != -1) |
| 633 | return td->pages[chip] >> |
| 634 | (this->bbt_erase_shift - this->page_shift); |
| 635 | |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 636 | numblocks = (int)(targetsize >> this->bbt_erase_shift); |
Boris Brezillon | c3baf27 | 2016-08-15 18:22:01 -0500 | [diff] [blame] | 637 | if (!(td->options & NAND_BBT_PERCHIP)) |
Boris Brezillon | 32813e2 | 2018-10-29 11:58:29 +0100 | [diff] [blame] | 638 | numblocks *= nanddev_ntargets(&this->base); |
Boris Brezillon | c3baf27 | 2016-08-15 18:22:01 -0500 | [diff] [blame] | 639 | |
| 640 | /* |
| 641 | * Automatic placement of the bad block table. Search direction |
| 642 | * top -> down? |
| 643 | */ |
| 644 | if (td->options & NAND_BBT_LASTBLOCK) { |
| 645 | startblock = numblocks * (chip + 1) - 1; |
| 646 | dir = -1; |
| 647 | } else { |
| 648 | startblock = chip * numblocks; |
| 649 | dir = 1; |
| 650 | } |
| 651 | |
| 652 | for (i = 0; i < td->maxblocks; i++) { |
| 653 | int block = startblock + dir * i; |
| 654 | |
| 655 | /* Check, if the block is bad */ |
| 656 | switch (bbt_get_entry(this, block)) { |
| 657 | case BBT_BLOCK_WORN: |
| 658 | case BBT_BLOCK_FACTORY_BAD: |
| 659 | continue; |
| 660 | } |
| 661 | |
| 662 | page = block << (this->bbt_erase_shift - this->page_shift); |
| 663 | |
| 664 | /* Check, if the block is used by the mirror table */ |
| 665 | if (!md || md->pages[chip] != page) |
| 666 | return block; |
| 667 | } |
| 668 | |
| 669 | return -ENOSPC; |
| 670 | } |
| 671 | |
| 672 | /** |
Kyle Roeschley | 10ffd57 | 2016-08-15 18:22:02 -0500 | [diff] [blame] | 673 | * mark_bbt_block_bad - Mark one of the block reserved for BBT bad |
| 674 | * @this: the NAND device |
| 675 | * @td: the BBT description |
| 676 | * @chip: the CHIP selector |
| 677 | * @block: the BBT block to mark |
| 678 | * |
| 679 | * Blocks reserved for BBT can become bad. This functions is an helper to mark |
| 680 | * such blocks as bad. It takes care of updating the in-memory BBT, marking the |
| 681 | * block as bad using a bad block marker and invalidating the associated |
| 682 | * td->pages[] entry. |
| 683 | */ |
| 684 | static void mark_bbt_block_bad(struct nand_chip *this, |
| 685 | struct nand_bbt_descr *td, |
| 686 | int chip, int block) |
| 687 | { |
Kyle Roeschley | 10ffd57 | 2016-08-15 18:22:02 -0500 | [diff] [blame] | 688 | loff_t to; |
| 689 | int res; |
| 690 | |
| 691 | bbt_mark_entry(this, block, BBT_BLOCK_WORN); |
| 692 | |
| 693 | to = (loff_t)block << this->bbt_erase_shift; |
Boris Brezillon | cdc784c | 2018-09-07 00:38:38 +0200 | [diff] [blame] | 694 | res = nand_markbad_bbm(this, to); |
Kyle Roeschley | 10ffd57 | 2016-08-15 18:22:02 -0500 | [diff] [blame] | 695 | if (res) |
| 696 | pr_warn("nand_bbt: error %d while marking block %d bad\n", |
| 697 | res, block); |
| 698 | |
| 699 | td->pages[chip] = -1; |
| 700 | } |
| 701 | |
| 702 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | * write_bbt - [GENERIC] (Re)write the bad block table |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 704 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 705 | * @buf: temporary buffer |
| 706 | * @td: descriptor for the bad block table |
| 707 | * @md: descriptor for the bad block table mirror |
| 708 | * @chipsel: selector for a specific chip, -1 for all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 710 | * (Re)write the bad block table. |
| 711 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 712 | static int write_bbt(struct nand_chip *this, uint8_t *buf, |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 713 | struct nand_bbt_descr *td, struct nand_bbt_descr *md, |
| 714 | int chipsel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 716 | u64 targetsize = nanddev_target_size(&this->base); |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 717 | struct mtd_info *mtd = nand_to_mtd(this); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | struct erase_info einfo; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 719 | int i, res, chip = 0; |
Boris Brezillon | c3baf27 | 2016-08-15 18:22:01 -0500 | [diff] [blame] | 720 | int bits, page, offs, numblocks, sft, sftmsk; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 721 | int nrchips, pageoffs, ooboffs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | uint8_t msk[4]; |
| 723 | uint8_t rcode = td->reserved_block_code; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 724 | size_t retlen, len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | loff_t to; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 726 | struct mtd_oob_ops ops; |
| 727 | |
| 728 | ops.ooblen = mtd->oobsize; |
| 729 | ops.ooboffs = 0; |
| 730 | ops.datbuf = NULL; |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 731 | ops.mode = MTD_OPS_PLACE_OOB; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
| 733 | if (!rcode) |
| 734 | rcode = 0xff; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 735 | /* Write bad block table per chip rather than per device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | if (td->options & NAND_BBT_PERCHIP) { |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 737 | numblocks = (int)(targetsize >> this->bbt_erase_shift); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 738 | /* Full device write or specific chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | if (chipsel == -1) { |
Boris Brezillon | 32813e2 | 2018-10-29 11:58:29 +0100 | [diff] [blame] | 740 | nrchips = nanddev_ntargets(&this->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | } else { |
| 742 | nrchips = chipsel + 1; |
| 743 | chip = chipsel; |
| 744 | } |
| 745 | } else { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 746 | numblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | nrchips = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 748 | } |
| 749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | /* Loop through the chips */ |
Kyle Roeschley | 10ffd57 | 2016-08-15 18:22:02 -0500 | [diff] [blame] | 751 | while (chip < nrchips) { |
Boris Brezillon | c3baf27 | 2016-08-15 18:22:01 -0500 | [diff] [blame] | 752 | int block; |
| 753 | |
| 754 | block = get_bbt_block(this, td, md, chip); |
| 755 | if (block < 0) { |
| 756 | pr_err("No space left to write bad block table\n"); |
| 757 | res = block; |
| 758 | goto outerr; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 759 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 761 | /* |
Boris Brezillon | c3baf27 | 2016-08-15 18:22:01 -0500 | [diff] [blame] | 762 | * get_bbt_block() returns a block number, shift the value to |
| 763 | * get a page number. |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 764 | */ |
Boris Brezillon | c3baf27 | 2016-08-15 18:22:01 -0500 | [diff] [blame] | 765 | page = block << (this->bbt_erase_shift - this->page_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
| 767 | /* Set up shift count and masks for the flash table */ |
| 768 | bits = td->options & NAND_BBT_NRBITS_MSK; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 769 | msk[2] = ~rcode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | switch (bits) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 771 | case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01; |
| 772 | msk[3] = 0x01; |
| 773 | break; |
| 774 | case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01; |
| 775 | msk[3] = 0x03; |
| 776 | break; |
| 777 | case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C; |
| 778 | msk[3] = 0x0f; |
| 779 | break; |
| 780 | case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; |
| 781 | msk[3] = 0xff; |
| 782 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | default: return -EINVAL; |
| 784 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 785 | |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 786 | to = ((loff_t)page) << this->page_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 788 | /* Must we save the block contents? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | if (td->options & NAND_BBT_SAVECONTENT) { |
| 790 | /* Make it block aligned */ |
Brian Norris | f5cd2ae | 2015-02-28 02:13:13 -0800 | [diff] [blame] | 791 | to &= ~(((loff_t)1 << this->bbt_erase_shift) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | len = 1 << this->bbt_erase_shift; |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 793 | res = mtd_read(mtd, to, len, &retlen, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | if (res < 0) { |
| 795 | if (retlen != len) { |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 796 | pr_info("nand_bbt: error reading block for writing the bad block table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | return res; |
| 798 | } |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 799 | pr_warn("nand_bbt: ECC error while reading block for writing bad block table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | } |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 801 | /* Read oob data */ |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 802 | ops.ooblen = (len >> this->page_shift) * mtd->oobsize; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 803 | ops.oobbuf = &buf[len]; |
Artem Bityutskiy | fd2819b | 2011-12-23 18:27:05 +0200 | [diff] [blame] | 804 | res = mtd_read_oob(mtd, to + mtd->writesize, &ops); |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 805 | if (res < 0 || ops.oobretlen != ops.ooblen) |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 806 | goto outerr; |
| 807 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | /* Calc the byte offset in the buffer */ |
| 809 | pageoffs = page - (int)(to >> this->page_shift); |
| 810 | offs = pageoffs << this->page_shift; |
| 811 | /* Preset the bbt area with 0xff */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 812 | memset(&buf[offs], 0xff, (size_t)(numblocks >> sft)); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 813 | ooboffs = len + (pageoffs * mtd->oobsize); |
| 814 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 815 | } else if (td->options & NAND_BBT_NO_OOB) { |
| 816 | ooboffs = 0; |
| 817 | offs = td->len; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 818 | /* The version byte */ |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 819 | if (td->options & NAND_BBT_VERSION) |
| 820 | offs++; |
| 821 | /* Calc length */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 822 | len = (size_t)(numblocks >> sft); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 823 | len += offs; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 824 | /* Make it page aligned! */ |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 825 | len = ALIGN(len, mtd->writesize); |
| 826 | /* Preset the buffer with 0xff */ |
| 827 | memset(buf, 0xff, len); |
| 828 | /* Pattern is located at the begin of first page */ |
| 829 | memcpy(buf, td->pattern, td->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | } else { |
| 831 | /* Calc length */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 832 | len = (size_t)(numblocks >> sft); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 833 | /* Make it page aligned! */ |
Sebastian Andrzej Siewior | cda3209 | 2010-09-29 19:43:50 +0200 | [diff] [blame] | 834 | len = ALIGN(len, mtd->writesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | /* Preset the buffer with 0xff */ |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 836 | memset(buf, 0xff, len + |
| 837 | (len >> this->page_shift)* mtd->oobsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | offs = 0; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 839 | ooboffs = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | /* Pattern is located in oob area of first page */ |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 841 | memcpy(&buf[ooboffs + td->offs], td->pattern, td->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 843 | |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 844 | if (td->options & NAND_BBT_VERSION) |
| 845 | buf[ooboffs + td->veroffs] = td->version[chip]; |
| 846 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 847 | /* Walk through the memory table */ |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 848 | for (i = 0; i < numblocks; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | uint8_t dat; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 850 | int sftcnt = (i << (3 - sft)) & sftmsk; |
| 851 | dat = bbt_get_entry(this, chip * numblocks + i); |
| 852 | /* Do not store the reserved bbt blocks! */ |
| 853 | buf[offs + (i >> sft)] &= ~(msk[dat] << sftcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 855 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 856 | memset(&einfo, 0, sizeof(einfo)); |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 857 | einfo.addr = to; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | einfo.len = 1 << this->bbt_erase_shift; |
Boris Brezillon | e4cdf9c | 2018-09-06 14:05:35 +0200 | [diff] [blame] | 859 | res = nand_erase_nand(this, &einfo, 1); |
Kyle Roeschley | 10ffd57 | 2016-08-15 18:22:02 -0500 | [diff] [blame] | 860 | if (res < 0) { |
| 861 | pr_warn("nand_bbt: error while erasing BBT block %d\n", |
| 862 | res); |
| 863 | mark_bbt_block_bad(this, td, chip, block); |
| 864 | continue; |
| 865 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 866 | |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 867 | res = scan_write_bbt(this, to, len, buf, |
| 868 | td->options & NAND_BBT_NO_OOB ? |
| 869 | NULL : &buf[len]); |
Kyle Roeschley | 10ffd57 | 2016-08-15 18:22:02 -0500 | [diff] [blame] | 870 | if (res < 0) { |
| 871 | pr_warn("nand_bbt: error while writing BBT block %d\n", |
| 872 | res); |
| 873 | mark_bbt_block_bad(this, td, chip, block); |
| 874 | continue; |
| 875 | } |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 876 | |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 877 | pr_info("Bad block table written to 0x%012llx, version 0x%02X\n", |
| 878 | (unsigned long long)to, td->version[chip]); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 879 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | /* Mark it as used */ |
Kyle Roeschley | 10ffd57 | 2016-08-15 18:22:02 -0500 | [diff] [blame] | 881 | td->pages[chip++] = page; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 882 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | return 0; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 884 | |
| 885 | outerr: |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 886 | pr_warn("nand_bbt: error while writing bad block table %d\n", res); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 887 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | } |
| 889 | |
| 890 | /** |
| 891 | * nand_memory_bbt - [GENERIC] create a memory based bad block table |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 892 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 893 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 895 | * The function creates a memory based bbt by scanning the device for |
| 896 | * manufacturer / software marked good / bad blocks. |
| 897 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 898 | static inline int nand_memory_bbt(struct nand_chip *this, |
| 899 | struct nand_bbt_descr *bd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | { |
Boris Brezillon | eeab717 | 2018-10-28 15:27:55 +0100 | [diff] [blame] | 901 | u8 *pagebuf = nand_get_data_buf(this); |
| 902 | |
| 903 | return create_bbt(this, pagebuf, bd, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | /** |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 907 | * check_create - [GENERIC] create and write bbt(s) if necessary |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 908 | * @this: the NAND device |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 909 | * @buf: temporary buffer |
| 910 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 912 | * The function checks the results of the previous call to read_bbt and creates |
| 913 | * / updates the bbt(s) if necessary. Creation is necessary if no bbt was found |
| 914 | * for the chip/device. Update is necessary if one of the tables is missing or |
| 915 | * the version nr. of one table is less than the other. |
| 916 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 917 | static int check_create(struct nand_chip *this, uint8_t *buf, |
| 918 | struct nand_bbt_descr *bd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | { |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 920 | int i, chips, writeops, create, chipsel, res, res2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | struct nand_bbt_descr *td = this->bbt_td; |
| 922 | struct nand_bbt_descr *md = this->bbt_md; |
| 923 | struct nand_bbt_descr *rd, *rd2; |
| 924 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 925 | /* Do we have a bbt per chip? */ |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 926 | if (td->options & NAND_BBT_PERCHIP) |
Boris Brezillon | 32813e2 | 2018-10-29 11:58:29 +0100 | [diff] [blame] | 927 | chips = nanddev_ntargets(&this->base); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 928 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | chips = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 930 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | for (i = 0; i < chips; i++) { |
| 932 | writeops = 0; |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 933 | create = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | rd = NULL; |
| 935 | rd2 = NULL; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 936 | res = res2 = 0; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 937 | /* Per chip or per device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 939 | /* Mirrored table available? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | if (md) { |
| 941 | if (td->pages[i] == -1 && md->pages[i] == -1) { |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 942 | create = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | writeops = 0x03; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 944 | } else if (td->pages[i] == -1) { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 945 | rd = md; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 946 | writeops = 0x01; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 947 | } else if (md->pages[i] == -1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | rd = td; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 949 | writeops = 0x02; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 950 | } else if (td->version[i] == md->version[i]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | rd = td; |
| 952 | if (!(td->options & NAND_BBT_VERSION)) |
| 953 | rd2 = md; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 954 | } else if (((int8_t)(td->version[i] - md->version[i])) > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | rd = td; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 956 | writeops = 0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | } else { |
| 958 | rd = md; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 959 | writeops = 0x01; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | } else { |
| 962 | if (td->pages[i] == -1) { |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 963 | create = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | writeops = 0x01; |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 965 | } else { |
| 966 | rd = td; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 969 | |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 970 | if (create) { |
| 971 | /* Create the bad block table by scanning the device? */ |
| 972 | if (!(td->options & NAND_BBT_CREATE)) |
| 973 | continue; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 974 | |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 975 | /* Create the table in memory by scanning the chip(s) */ |
| 976 | if (!(this->bbt_options & NAND_BBT_CREATE_EMPTY)) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 977 | create_bbt(this, buf, bd, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 979 | td->version[i] = 1; |
| 980 | if (md) |
| 981 | md->version[i] = 1; |
| 982 | } |
| 983 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 984 | /* Read back first? */ |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 985 | if (rd) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 986 | res = read_abs_bbt(this, buf, rd, chipsel); |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 987 | if (mtd_is_eccerr(res)) { |
| 988 | /* Mark table as invalid */ |
| 989 | rd->pages[i] = -1; |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 990 | rd->version[i] = 0; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 991 | i--; |
| 992 | continue; |
| 993 | } |
| 994 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 995 | /* If they weren't versioned, read both */ |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 996 | if (rd2) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 997 | res2 = read_abs_bbt(this, buf, rd2, chipsel); |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 998 | if (mtd_is_eccerr(res2)) { |
| 999 | /* Mark table as invalid */ |
| 1000 | rd2->pages[i] = -1; |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 1001 | rd2->version[i] = 0; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 1002 | i--; |
| 1003 | continue; |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | /* Scrub the flash table(s)? */ |
| 1008 | if (mtd_is_bitflip(res) || mtd_is_bitflip(res2)) |
| 1009 | writeops = 0x03; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 1011 | /* Update version numbers before writing */ |
| 1012 | if (md) { |
| 1013 | td->version[i] = max(td->version[i], md->version[i]); |
| 1014 | md->version[i] = td->version[i]; |
| 1015 | } |
| 1016 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1017 | /* Write the bad block table to the device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1019 | res = write_bbt(this, buf, td, md, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | if (res < 0) |
| 1021 | return res; |
| 1022 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1023 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1024 | /* Write the mirror bad block table to the device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1026 | res = write_bbt(this, buf, md, td, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | if (res < 0) |
| 1028 | return res; |
| 1029 | } |
| 1030 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1031 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | /** |
Boris Brezillon | 99f3351 | 2018-11-11 08:55:04 +0100 | [diff] [blame] | 1035 | * nand_update_bbt - update bad block table(s) |
| 1036 | * @this: the NAND device |
| 1037 | * @offs: the offset of the newly marked block |
| 1038 | * |
| 1039 | * The function updates the bad block table(s). |
| 1040 | */ |
| 1041 | static int nand_update_bbt(struct nand_chip *this, loff_t offs) |
| 1042 | { |
| 1043 | struct mtd_info *mtd = nand_to_mtd(this); |
| 1044 | int len, res = 0; |
| 1045 | int chip, chipsel; |
| 1046 | uint8_t *buf; |
| 1047 | struct nand_bbt_descr *td = this->bbt_td; |
| 1048 | struct nand_bbt_descr *md = this->bbt_md; |
| 1049 | |
| 1050 | if (!this->bbt || !td) |
| 1051 | return -EINVAL; |
| 1052 | |
| 1053 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1054 | len = (1 << this->bbt_erase_shift); |
| 1055 | len += (len >> this->page_shift) * mtd->oobsize; |
| 1056 | buf = kmalloc(len, GFP_KERNEL); |
| 1057 | if (!buf) |
| 1058 | return -ENOMEM; |
| 1059 | |
| 1060 | /* Do we have a bbt per chip? */ |
| 1061 | if (td->options & NAND_BBT_PERCHIP) { |
| 1062 | chip = (int)(offs >> this->chip_shift); |
| 1063 | chipsel = chip; |
| 1064 | } else { |
| 1065 | chip = 0; |
| 1066 | chipsel = -1; |
| 1067 | } |
| 1068 | |
| 1069 | td->version[chip]++; |
| 1070 | if (md) |
| 1071 | md->version[chip]++; |
| 1072 | |
| 1073 | /* Write the bad block table to the device? */ |
| 1074 | if (td->options & NAND_BBT_WRITE) { |
| 1075 | res = write_bbt(this, buf, td, md, chipsel); |
| 1076 | if (res < 0) |
| 1077 | goto out; |
| 1078 | } |
| 1079 | /* Write the mirror bad block table to the device? */ |
| 1080 | if (md && (md->options & NAND_BBT_WRITE)) { |
| 1081 | res = write_bbt(this, buf, md, td, chipsel); |
| 1082 | } |
| 1083 | |
| 1084 | out: |
| 1085 | kfree(buf); |
| 1086 | return res; |
| 1087 | } |
| 1088 | |
| 1089 | /** |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1090 | * mark_bbt_regions - [GENERIC] mark the bad block table regions |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1091 | * @this: the NAND device |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1092 | * @td: bad block table descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1094 | * The bad block table regions are marked as "bad" to prevent accidental |
| 1095 | * erasures / writes. The regions are identified by the mark 0x02. |
| 1096 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1097 | static void mark_bbt_region(struct nand_chip *this, struct nand_bbt_descr *td) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | { |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 1099 | u64 targetsize = nanddev_target_size(&this->base); |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1100 | struct mtd_info *mtd = nand_to_mtd(this); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | int i, j, chips, block, nrblocks, update; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1102 | uint8_t oldval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1104 | /* Do we have a bbt per chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | if (td->options & NAND_BBT_PERCHIP) { |
Boris Brezillon | 32813e2 | 2018-10-29 11:58:29 +0100 | [diff] [blame] | 1106 | chips = nanddev_ntargets(&this->base); |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 1107 | nrblocks = (int)(targetsize >> this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | } else { |
| 1109 | chips = 1; |
| 1110 | nrblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1111 | } |
| 1112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | for (i = 0; i < chips; i++) { |
| 1114 | if ((td->options & NAND_BBT_ABSPAGE) || |
| 1115 | !(td->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1116 | if (td->pages[i] == -1) |
| 1117 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift); |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1119 | oldval = bbt_get_entry(this, block); |
| 1120 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1121 | if ((oldval != BBT_BLOCK_RESERVED) && |
| 1122 | td->reserved_block_code) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1123 | nand_update_bbt(this, (loff_t)block << |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1124 | this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | continue; |
| 1126 | } |
| 1127 | update = 0; |
| 1128 | if (td->options & NAND_BBT_LASTBLOCK) |
| 1129 | block = ((i + 1) * nrblocks) - td->maxblocks; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1130 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | block = i * nrblocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | for (j = 0; j < td->maxblocks; j++) { |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1133 | oldval = bbt_get_entry(this, block); |
| 1134 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1135 | if (oldval != BBT_BLOCK_RESERVED) |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1136 | update = 1; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1137 | block++; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1138 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1139 | /* |
| 1140 | * If we want reserved blocks to be recorded to flash, and some |
| 1141 | * new ones have been marked, then we need to update the stored |
| 1142 | * bbts. This should only happen once. |
| 1143 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | if (update && td->reserved_block_code) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1145 | nand_update_bbt(this, (loff_t)(block - 1) << |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1146 | this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | } |
| 1148 | } |
| 1149 | |
| 1150 | /** |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1151 | * verify_bbt_descr - verify the bad block description |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1152 | * @this: the NAND device |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1153 | * @bd: the table to verify |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1154 | * |
| 1155 | * This functions performs a few sanity checks on the bad block description |
| 1156 | * table. |
| 1157 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1158 | static void verify_bbt_descr(struct nand_chip *this, struct nand_bbt_descr *bd) |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1159 | { |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 1160 | u64 targetsize = nanddev_target_size(&this->base); |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1161 | struct mtd_info *mtd = nand_to_mtd(this); |
Stanislav Fomichev | 7912a5e | 2011-02-07 23:48:25 +0300 | [diff] [blame] | 1162 | u32 pattern_len; |
| 1163 | u32 bits; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1164 | u32 table_size; |
| 1165 | |
| 1166 | if (!bd) |
| 1167 | return; |
Stanislav Fomichev | 7912a5e | 2011-02-07 23:48:25 +0300 | [diff] [blame] | 1168 | |
| 1169 | pattern_len = bd->len; |
| 1170 | bits = bd->options & NAND_BBT_NRBITS_MSK; |
| 1171 | |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1172 | BUG_ON((this->bbt_options & NAND_BBT_NO_OOB) && |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1173 | !(this->bbt_options & NAND_BBT_USE_FLASH)); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1174 | BUG_ON(!bits); |
| 1175 | |
| 1176 | if (bd->options & NAND_BBT_VERSION) |
| 1177 | pattern_len++; |
| 1178 | |
| 1179 | if (bd->options & NAND_BBT_NO_OOB) { |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1180 | BUG_ON(!(this->bbt_options & NAND_BBT_USE_FLASH)); |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1181 | BUG_ON(!(this->bbt_options & NAND_BBT_NO_OOB)); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1182 | BUG_ON(bd->offs); |
| 1183 | if (bd->options & NAND_BBT_VERSION) |
| 1184 | BUG_ON(bd->veroffs != bd->len); |
| 1185 | BUG_ON(bd->options & NAND_BBT_SAVECONTENT); |
| 1186 | } |
| 1187 | |
| 1188 | if (bd->options & NAND_BBT_PERCHIP) |
Boris Brezillon | 6c836d5 | 2018-10-29 11:22:16 +0100 | [diff] [blame] | 1189 | table_size = targetsize >> this->bbt_erase_shift; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1190 | else |
| 1191 | table_size = mtd->size >> this->bbt_erase_shift; |
| 1192 | table_size >>= 3; |
| 1193 | table_size *= bits; |
| 1194 | if (bd->options & NAND_BBT_NO_OOB) |
| 1195 | table_size += pattern_len; |
| 1196 | BUG_ON(table_size > (1 << this->bbt_erase_shift)); |
| 1197 | } |
| 1198 | |
| 1199 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | * nand_scan_bbt - [NAND Interface] scan, find, read and maybe create bad block table(s) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1201 | * @this: the NAND device |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1202 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1204 | * The function checks, if a bad block table(s) is/are already available. If |
| 1205 | * not it scans the device for manufacturer marked good / bad blocks and writes |
| 1206 | * the bad block table(s) to the selected place. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1208 | * The bad block table memory is allocated here. It must be freed by calling |
| 1209 | * the nand_free_bbt function. |
| 1210 | */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1211 | static int nand_scan_bbt(struct nand_chip *this, struct nand_bbt_descr *bd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1213 | struct mtd_info *mtd = nand_to_mtd(this); |
Brian Norris | 83c5954 | 2015-02-28 02:13:12 -0800 | [diff] [blame] | 1214 | int len, res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | uint8_t *buf; |
| 1216 | struct nand_bbt_descr *td = this->bbt_td; |
| 1217 | struct nand_bbt_descr *md = this->bbt_md; |
| 1218 | |
Sheng Yong | 192db1c | 2015-07-31 01:12:44 +0000 | [diff] [blame] | 1219 | len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1220 | /* |
| 1221 | * Allocate memory (2bit per block) and clear the memory bad block |
| 1222 | * table. |
| 1223 | */ |
Burman Yan | 95b93a0 | 2006-11-15 21:10:29 +0200 | [diff] [blame] | 1224 | this->bbt = kzalloc(len, GFP_KERNEL); |
Brian Norris | 0870066 | 2011-06-07 16:01:54 -0700 | [diff] [blame] | 1225 | if (!this->bbt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1228 | /* |
| 1229 | * If no primary table decriptor is given, scan the device to build a |
| 1230 | * memory based bad block table. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | */ |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 1232 | if (!td) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1233 | if ((res = nand_memory_bbt(this, bd))) { |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 1234 | pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n"); |
Brian Norris | 83c5954 | 2015-02-28 02:13:12 -0800 | [diff] [blame] | 1235 | goto err; |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 1236 | } |
Brian Norris | 83c5954 | 2015-02-28 02:13:12 -0800 | [diff] [blame] | 1237 | return 0; |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 1238 | } |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1239 | verify_bbt_descr(this, td); |
| 1240 | verify_bbt_descr(this, md); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | |
| 1242 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1243 | len = (1 << this->bbt_erase_shift); |
| 1244 | len += (len >> this->page_shift) * mtd->oobsize; |
David Woodhouse | c3f8abf | 2006-05-13 04:03:42 +0100 | [diff] [blame] | 1245 | buf = vmalloc(len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | if (!buf) { |
Brian Norris | 83c5954 | 2015-02-28 02:13:12 -0800 | [diff] [blame] | 1247 | res = -ENOMEM; |
| 1248 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1250 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1251 | /* Is the bbt at a given page? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | if (td->options & NAND_BBT_ABSPAGE) { |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1253 | read_abs_bbts(this, buf, td, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1254 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | /* Search the bad block table using a pattern in oob */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1256 | search_read_bbts(this, buf, td, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1257 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1259 | res = check_create(this, buf, bd); |
Brian Norris | 83c5954 | 2015-02-28 02:13:12 -0800 | [diff] [blame] | 1260 | if (res) |
| 1261 | goto err; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | /* Prevent the bbt regions from erasing / writing */ |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1264 | mark_bbt_region(this, td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | if (md) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1266 | mark_bbt_region(this, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1267 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1268 | vfree(buf); |
Brian Norris | 83c5954 | 2015-02-28 02:13:12 -0800 | [diff] [blame] | 1269 | return 0; |
| 1270 | |
| 1271 | err: |
| 1272 | kfree(this->bbt); |
| 1273 | this->bbt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | return res; |
| 1275 | } |
| 1276 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1277 | /* |
| 1278 | * Define some generic bad / good block scan pattern which are used |
| 1279 | * while scanning a device for factory marked good / bad blocks. |
| 1280 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; |
| 1282 | |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 1283 | /* Generic flash bbt descriptors */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' }; |
| 1285 | static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' }; |
| 1286 | |
| 1287 | static struct nand_bbt_descr bbt_main_descr = { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1288 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1290 | .offs = 8, |
| 1291 | .len = 4, |
| 1292 | .veroffs = 12, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1293 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | .pattern = bbt_pattern |
| 1295 | }; |
| 1296 | |
| 1297 | static struct nand_bbt_descr bbt_mirror_descr = { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1298 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1300 | .offs = 8, |
| 1301 | .len = 4, |
| 1302 | .veroffs = 12, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1303 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | .pattern = mirror_pattern |
| 1305 | }; |
| 1306 | |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1307 | static struct nand_bbt_descr bbt_main_no_oob_descr = { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1308 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1309 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1310 | | NAND_BBT_NO_OOB, |
| 1311 | .len = 4, |
| 1312 | .veroffs = 4, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1313 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1314 | .pattern = bbt_pattern |
| 1315 | }; |
| 1316 | |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1317 | static struct nand_bbt_descr bbt_mirror_no_oob_descr = { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1318 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1319 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1320 | | NAND_BBT_NO_OOB, |
| 1321 | .len = 4, |
| 1322 | .veroffs = 4, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1323 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1324 | .pattern = mirror_pattern |
| 1325 | }; |
| 1326 | |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1327 | #define BADBLOCK_SCAN_MASK (~NAND_BBT_NO_OOB) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1328 | /** |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1329 | * nand_create_badblock_pattern - [INTERN] Creates a BBT descriptor structure |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1330 | * @this: NAND chip to create descriptor for |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1331 | * |
| 1332 | * This function allocates and initializes a nand_bbt_descr for BBM detection |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1333 | * based on the properties of @this. The new descriptor is stored in |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1334 | * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when |
| 1335 | * passed to this function. |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1336 | */ |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1337 | static int nand_create_badblock_pattern(struct nand_chip *this) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1338 | { |
| 1339 | struct nand_bbt_descr *bd; |
| 1340 | if (this->badblock_pattern) { |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1341 | pr_warn("Bad block pattern already allocated; not replacing\n"); |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1342 | return -EINVAL; |
| 1343 | } |
| 1344 | bd = kzalloc(sizeof(*bd), GFP_KERNEL); |
Brian Norris | 0870066 | 2011-06-07 16:01:54 -0700 | [diff] [blame] | 1345 | if (!bd) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1346 | return -ENOMEM; |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1347 | bd->options = this->bbt_options & BADBLOCK_SCAN_MASK; |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1348 | bd->offs = this->badblockpos; |
| 1349 | bd->len = (this->options & NAND_BUSWIDTH_16) ? 2 : 1; |
| 1350 | bd->pattern = scan_ff_pattern; |
| 1351 | bd->options |= NAND_BBT_DYNAMICSTRUCT; |
| 1352 | this->badblock_pattern = bd; |
| 1353 | return 0; |
| 1354 | } |
| 1355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | /** |
Boris Brezillon | 44b07b9 | 2018-07-05 12:27:30 +0200 | [diff] [blame] | 1357 | * nand_create_bbt - [NAND Interface] Select a default bad block table for the device |
| 1358 | * @this: NAND chip object |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1360 | * This function selects the default bad block table support for the device and |
| 1361 | * calls the nand_scan_bbt function. |
| 1362 | */ |
Boris Brezillon | 44b07b9 | 2018-07-05 12:27:30 +0200 | [diff] [blame] | 1363 | int nand_create_bbt(struct nand_chip *this) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | { |
Brian Norris | abb9cf7 | 2014-05-20 22:34:40 -0700 | [diff] [blame] | 1365 | int ret; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1366 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1367 | /* Is a flash based bad block table requested? */ |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1368 | if (this->bbt_options & NAND_BBT_USE_FLASH) { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1369 | /* Use the default pattern descriptors */ |
| 1370 | if (!this->bbt_td) { |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1371 | if (this->bbt_options & NAND_BBT_NO_OOB) { |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1372 | this->bbt_td = &bbt_main_no_oob_descr; |
| 1373 | this->bbt_md = &bbt_mirror_no_oob_descr; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1374 | } else { |
| 1375 | this->bbt_td = &bbt_main_descr; |
| 1376 | this->bbt_md = &bbt_mirror_descr; |
| 1377 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | } else { |
| 1380 | this->bbt_td = NULL; |
| 1381 | this->bbt_md = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | } |
Brian Norris | a2f812d | 2011-03-18 21:53:42 -0700 | [diff] [blame] | 1383 | |
Brian Norris | abb9cf7 | 2014-05-20 22:34:40 -0700 | [diff] [blame] | 1384 | if (!this->badblock_pattern) { |
| 1385 | ret = nand_create_badblock_pattern(this); |
| 1386 | if (ret) |
| 1387 | return ret; |
| 1388 | } |
Brian Norris | a2f812d | 2011-03-18 21:53:42 -0700 | [diff] [blame] | 1389 | |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1390 | return nand_scan_bbt(this, this->badblock_pattern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | } |
Boris Brezillon | 44b07b9 | 2018-07-05 12:27:30 +0200 | [diff] [blame] | 1392 | EXPORT_SYMBOL(nand_create_bbt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | |
| 1394 | /** |
Ezequiel Garcia | 8471bb7 | 2014-05-21 19:06:12 -0300 | [diff] [blame] | 1395 | * nand_isreserved_bbt - [NAND Interface] Check if a block is reserved |
Boris Brezillon | 5740d4c | 2018-09-06 14:05:34 +0200 | [diff] [blame] | 1396 | * @this: NAND chip object |
Ezequiel Garcia | 8471bb7 | 2014-05-21 19:06:12 -0300 | [diff] [blame] | 1397 | * @offs: offset in the device |
| 1398 | */ |
Boris Brezillon | 5740d4c | 2018-09-06 14:05:34 +0200 | [diff] [blame] | 1399 | int nand_isreserved_bbt(struct nand_chip *this, loff_t offs) |
Ezequiel Garcia | 8471bb7 | 2014-05-21 19:06:12 -0300 | [diff] [blame] | 1400 | { |
Ezequiel Garcia | 8471bb7 | 2014-05-21 19:06:12 -0300 | [diff] [blame] | 1401 | int block; |
| 1402 | |
| 1403 | block = (int)(offs >> this->bbt_erase_shift); |
| 1404 | return bbt_get_entry(this, block) == BBT_BLOCK_RESERVED; |
| 1405 | } |
| 1406 | |
| 1407 | /** |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1408 | * nand_isbad_bbt - [NAND Interface] Check if a block is bad |
Boris Brezillon | 5740d4c | 2018-09-06 14:05:34 +0200 | [diff] [blame] | 1409 | * @this: NAND chip object |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1410 | * @offs: offset in the device |
| 1411 | * @allowbbt: allow access to bad block table region |
| 1412 | */ |
Boris Brezillon | 5740d4c | 2018-09-06 14:05:34 +0200 | [diff] [blame] | 1413 | int nand_isbad_bbt(struct nand_chip *this, loff_t offs, int allowbbt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | { |
Brian Norris | 39dbb02 | 2013-07-30 17:52:57 -0700 | [diff] [blame] | 1415 | int block, res; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1416 | |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1417 | block = (int)(offs >> this->bbt_erase_shift); |
| 1418 | res = bbt_get_entry(this, block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 1420 | pr_debug("nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n", |
| 1421 | (unsigned int)offs, block, res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | |
Brian Norris | 39dbb02 | 2013-07-30 17:52:57 -0700 | [diff] [blame] | 1423 | switch (res) { |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1424 | case BBT_BLOCK_GOOD: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1425 | return 0; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1426 | case BBT_BLOCK_WORN: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1427 | return 1; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1428 | case BBT_BLOCK_RESERVED: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1429 | return allowbbt ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | } |
| 1431 | return 1; |
| 1432 | } |
| 1433 | |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1434 | /** |
| 1435 | * nand_markbad_bbt - [NAND Interface] Mark a block bad in the BBT |
Boris Brezillon | 5740d4c | 2018-09-06 14:05:34 +0200 | [diff] [blame] | 1436 | * @this: NAND chip object |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1437 | * @offs: offset of the bad block |
| 1438 | */ |
Boris Brezillon | 5740d4c | 2018-09-06 14:05:34 +0200 | [diff] [blame] | 1439 | int nand_markbad_bbt(struct nand_chip *this, loff_t offs) |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1440 | { |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1441 | int block, ret = 0; |
| 1442 | |
| 1443 | block = (int)(offs >> this->bbt_erase_shift); |
| 1444 | |
| 1445 | /* Mark bad block in memory */ |
| 1446 | bbt_mark_entry(this, block, BBT_BLOCK_WORN); |
| 1447 | |
| 1448 | /* Update flash-based bad block table */ |
| 1449 | if (this->bbt_options & NAND_BBT_USE_FLASH) |
Boris Brezillon | 0813621 | 2018-11-11 08:55:03 +0100 | [diff] [blame] | 1450 | ret = nand_update_bbt(this, offs); |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1451 | |
| 1452 | return ret; |
| 1453 | } |