^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2006-2008 Artem Bityutskiy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2006-2008 Jarkko Lavinen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006-2008 Adrian Hunter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Authors: Artem Bityutskiy, Jarkko Lavinen, Adria Hunter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * WARNING: this test program may kill your flash and your device. Do not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * use it unless you know what you do. Authors are not responsible for any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * damage caused by this program.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/ktime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "mtd_test.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define RETRIES 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int eb = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) module_param(eb, int, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) MODULE_PARM_DESC(eb, "eraseblock number within the selected MTD device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int ebcnt = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) module_param(ebcnt, int, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) MODULE_PARM_DESC(ebcnt, "number of consecutive eraseblocks to torture");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int pgcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) module_param(pgcnt, int, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) MODULE_PARM_DESC(pgcnt, "number of pages per eraseblock to torture (0 => all)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static int dev = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) module_param(dev, int, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) MODULE_PARM_DESC(dev, "MTD device number to use");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int gran = 512;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) module_param(gran, int, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) MODULE_PARM_DESC(gran, "how often the status information should be printed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static int check = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) module_param(check, int, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) MODULE_PARM_DESC(check, "if the written data should be checked");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static unsigned int cycles_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) module_param(cycles_count, uint, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) MODULE_PARM_DESC(cycles_count, "how many erase cycles to do "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) "(infinite by default)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static int random_pattern;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) module_param(random_pattern, int, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) MODULE_PARM_DESC(random_pattern, "if choose random pattern to program");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static struct mtd_info *mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* This buffer contains random pattern */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static unsigned char *patt_random;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* This buffer contains 0x555555...0xAAAAAA... pattern */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static unsigned char *patt_5A5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* This buffer contains 0xAAAAAA...0x555555... pattern */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static unsigned char *patt_A5A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* This buffer contains all 0xFF bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static unsigned char *patt_FF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* This a temporary buffer is use when checking data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static unsigned char *check_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* How many erase cycles were done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static unsigned int erase_cycles;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static int pgsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static ktime_t start, finish;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static void report_corrupt(unsigned char *read, unsigned char *written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static inline void start_timing(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) start = ktime_get();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static inline void stop_timing(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) finish = ktime_get();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * Check that the contents of eraseblock number @enbum is equivalent to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * @buf buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static inline int check_eraseblock(int ebnum, unsigned char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) int err, retries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) size_t read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) loff_t addr = (loff_t)ebnum * mtd->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) size_t len = mtd->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (pgcnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) addr = (loff_t)(ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) len = pgcnt * pgsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) retry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) err = mtd_read(mtd, addr, len, &read, check_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (mtd_is_bitflip(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) pr_err("single bit flip occurred at EB %d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) "MTD reported that it was fixed.\n", ebnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) else if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) pr_err("error %d while reading EB %d, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) "read %zd\n", err, ebnum, read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (read != len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) pr_err("failed to read %zd bytes from EB %d, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) "read only %zd, but no error reported\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) len, ebnum, read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (memcmp(buf, check_buf, len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) pr_err("read wrong data from EB %d\n", ebnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) report_corrupt(check_buf, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (retries++ < RETRIES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* Try read again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) yield();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) pr_info("re-try reading data from EB %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) ebnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) goto retry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) pr_info("retried %d times, still errors, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) "give-up\n", RETRIES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (retries != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) pr_info("only attempt number %d was OK (!!!)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) retries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static inline int write_pattern(int ebnum, void *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) size_t written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) loff_t addr = (loff_t)ebnum * mtd->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) size_t len = mtd->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (pgcnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) addr = (loff_t)(ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) len = pgcnt * pgsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) err = mtd_write(mtd, addr, len, &written, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) pr_err("error %d while writing EB %d, written %zd"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) " bytes\n", err, ebnum, written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (written != len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) pr_info("written only %zd bytes of %zd, but no error"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) " reported\n", written, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int __init tort_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) int err = 0, i, infinite = !cycles_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) unsigned char *bad_ebs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) printk(KERN_INFO "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) printk(KERN_INFO "=================================================\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) pr_info("Warning: this program is trying to wear out your "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) "flash, stop it if this is not wanted.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (dev < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) pr_info("Please specify a valid mtd-device via module parameter\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) pr_info("MTD device: %d\n", dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) pr_info("torture %d eraseblocks (%d-%d) of mtd%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) ebcnt, eb, eb + ebcnt - 1, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (pgcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) pr_info("torturing just %d pages per eraseblock\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) pgcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) pr_info("write verify %s\n", check ? "enabled" : "disabled");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) mtd = get_mtd_device(NULL, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (IS_ERR(mtd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) err = PTR_ERR(mtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) pr_err("error: cannot get MTD device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (mtd->writesize == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) pr_info("not NAND flash, assume page size is 512 "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) "bytes.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) pgsize = 512;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) pgsize = mtd->writesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (pgcnt && (pgcnt > mtd->erasesize / pgsize || pgcnt < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) pr_err("error: invalid pgcnt value %d\n", pgcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) goto out_mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) patt_random = kmalloc(mtd->erasesize, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (!patt_random)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) goto out_mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (!patt_5A5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) goto out_patt_random;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (!patt_A5A)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) goto out_patt_5A5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) patt_FF = kmalloc(mtd->erasesize, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!patt_FF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) goto out_patt_A5A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) check_buf = kmalloc(mtd->erasesize, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (!check_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) goto out_patt_FF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) bad_ebs = kzalloc(ebcnt, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (!bad_ebs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) goto out_check_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /* Initialize patterns */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) memset(patt_FF, 0xFF, mtd->erasesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) for (i = 0; i < mtd->erasesize / pgsize; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (!(i & 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) memset(patt_5A5 + i * pgsize, 0x55, pgsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) memset(patt_A5A + i * pgsize, 0xAA, pgsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) memset(patt_5A5 + i * pgsize, 0xAA, pgsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) memset(patt_A5A + i * pgsize, 0x55, pgsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) prandom_bytes(patt_random, mtd->erasesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) err = mtdtest_scan_for_bad_eraseblocks(mtd, bad_ebs, eb, ebcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) start_timing();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) void *patt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) err = mtdtest_erase_good_eraseblocks(mtd, bad_ebs, eb, ebcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) /* Check if the eraseblocks contain only 0xFF bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (check) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) for (i = eb; i < eb + ebcnt; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (bad_ebs[i - eb])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) err = check_eraseblock(i, patt_FF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) pr_info("verify failed"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) " for 0xFF... pattern\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) err = mtdtest_relax();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) /* Write the pattern */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) for (i = eb; i < eb + ebcnt; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (bad_ebs[i - eb])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if ((eb + erase_cycles) & 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) patt = patt_5A5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) patt = patt_A5A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (random_pattern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) patt = patt_random;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) err = write_pattern(i, patt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) err = mtdtest_relax();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /* Verify what we wrote */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (check) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) for (i = eb; i < eb + ebcnt; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (bad_ebs[i - eb])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if ((eb + erase_cycles) & 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) patt = patt_5A5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) patt = patt_A5A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (random_pattern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) patt = patt_random;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) err = check_eraseblock(i, patt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (random_pattern) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) pr_info("verify failed for random pattern\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) pr_info("verify failed for %s"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) " pattern\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) ((eb + erase_cycles) & 1) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) "0x55AA55..." : "0xAA55AA...");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) err = mtdtest_relax();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) erase_cycles += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (erase_cycles % gran == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) long ms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) stop_timing();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) ms = ktime_ms_delta(finish, start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) pr_info("%08u erase cycles done, took %lu "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) "milliseconds (%lu seconds)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) erase_cycles, ms, ms / 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) start_timing();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (!infinite && --cycles_count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) pr_info("finished after %u erase cycles\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) erase_cycles);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) kfree(bad_ebs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) out_check_buf:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) kfree(check_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) out_patt_FF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) kfree(patt_FF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) out_patt_A5A:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) kfree(patt_A5A);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) out_patt_5A5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) kfree(patt_5A5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) out_patt_random:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) kfree(patt_random);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) out_mtd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) put_mtd_device(mtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) pr_info("error %d occurred during torturing\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) printk(KERN_INFO "=================================================\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) module_init(tort_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) static void __exit tort_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) module_exit(tort_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static int countdiffs(unsigned char *buf, unsigned char *check_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) unsigned offset, unsigned len, unsigned *bytesp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) unsigned *bitsp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) static void print_bufs(unsigned char *read, unsigned char *written, int start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * Report the detailed information about how the read EB differs from what was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) * written.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) static void report_corrupt(unsigned char *read, unsigned char *written)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) int bytes, bits, pages, first;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) int offset, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) size_t check_len = mtd->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (pgcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) check_len = pgcnt * pgsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) bytes = bits = pages = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) for (i = 0; i < check_len; i += pgsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (countdiffs(written, read, i, pgsize, &bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) &bits) >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) pages++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) pr_info("verify fails on %d pages, %d bytes/%d bits\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) pages, bytes, bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) pr_info("The following is a list of all differences between"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) " what was read from flash and what was expected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) for (i = 0; i < check_len; i += pgsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) bytes = bits = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) first = countdiffs(written, read, i, pgsize, &bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) &bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (first < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) printk("-------------------------------------------------------"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) "----------------------------------\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) pr_info("Page %zd has %d bytes/%d bits failing verify,"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) " starting at offset 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) (mtd->erasesize - check_len + i) / pgsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) bytes, bits, first);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) offset = first & ~0x7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) len = ((first + bytes) | 0x7) + 1 - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) print_bufs(read, written, offset, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) static void print_bufs(unsigned char *read, unsigned char *written, int start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) int i = 0, j1, j2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) char *diff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) printk("Offset Read Written\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) while (i < len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) printk("0x%08x: ", start + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) diff = " ";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) for (j1 = 0; j1 < 8 && i + j1 < len; j1++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) printk(" %02x", read[start + i + j1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (read[start + i + j1] != written[start + i + j1])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) diff = "***";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) while (j1 < 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) printk(" ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) j1 += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) printk(" %s ", diff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) for (j2 = 0; j2 < 8 && i + j2 < len; j2++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) printk(" %02x", written[start + i + j2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) printk("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) i += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * Count the number of differing bytes and bits and return the first differing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) * offset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) static int countdiffs(unsigned char *buf, unsigned char *check_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) unsigned offset, unsigned len, unsigned *bytesp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) unsigned *bitsp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) unsigned i, bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) int first = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) for (i = offset; i < offset + len; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (buf[i] != check_buf[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) first = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) while (i < offset + len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (buf[i] != check_buf[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) (*bytesp)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) bit = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) while (bit < 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if ((buf[i] & bit) != (check_buf[i] & bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) (*bitsp)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) bit <<= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) return first;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) MODULE_DESCRIPTION("Eraseblock torturing module");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) MODULE_AUTHOR("Artem Bityutskiy, Jarkko Lavinen, Adrian Hunter");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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