118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include <getopt.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <ioctl.h>
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#include <linux/mtd/mtd.h>
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#include <mtd/mtd-peb.h>
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static int do_nand_bitflip(int argc, char *argv[])
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{
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int opt, ret, fd;
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static struct mtd_info_user meminfo;
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int block = 0;
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int random = 0;
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int num_bitflips = 1;
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loff_t offset = 0, roffset;
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int check = 0;
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size_t r;
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void *buf;
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while ((opt = getopt(argc, argv, "b:rn:o:c")) > 0) {
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switch (opt) {
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case 'r':
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random = 1;
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break;
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case 'n':
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num_bitflips = simple_strtoul(optarg, NULL, 0);
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break;
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case 'b':
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block = simple_strtoul(optarg, NULL, 0);
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break;
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case 'o':
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offset = simple_strtoull(optarg, NULL, 0);
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break;
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case 'c':
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check = 1;
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break;
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default:
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return COMMAND_ERROR_USAGE;
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}
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}
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if (optind >= argc)
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return COMMAND_ERROR_USAGE;
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fd = open(argv[optind], O_RDWR);
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if (fd < 0)
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return fd;
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ret = ioctl(fd, MEMGETINFO, &meminfo);
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close(fd);
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if (ret)
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return ret;
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block += mtd_div_by_eb(offset, meminfo.mtd);
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offset = mtd_mod_by_eb(offset, meminfo.mtd);
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if (!check) {
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ret = mtd_peb_create_bitflips(meminfo.mtd, block, offset, meminfo.writesize,
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num_bitflips, random, 1);
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if (ret) {
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printf("Creating bitflips failed with: %s\n", strerror(-ret));
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return ret;
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}
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}
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buf = xzalloc(meminfo.writesize);
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roffset = (loff_t)block * meminfo.mtd->erasesize + offset;
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ret = meminfo.mtd->read(meminfo.mtd, roffset, meminfo.writesize, &r, buf);
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if (ret > 0) {
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printf("page at block %d, offset 0x%08llx has %d bitflips%s\n",
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block, offset, ret,
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ret >= meminfo.mtd->bitflip_threshold ? ", needs cleanup" : "");
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} else if (!ret) {
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printf("No bitflips found on block %d, offset 0x%08llx\n", block, offset);
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} else {
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printf("Reading block %d, offset 0x%08llx failed with: %s\n", block, offset,
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strerror(-ret));
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}
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free(buf);
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return 0;
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}
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BAREBOX_CMD_HELP_START(nand_bitflip)
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BAREBOX_CMD_HELP_TEXT("This command creates bitflips on Nand pages.")
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT ("-b <block>", "block to work on")
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BAREBOX_CMD_HELP_OPT ("-o <offset>", "offset in Nand")
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BAREBOX_CMD_HELP_OPT ("-r\t", "flip random bits")
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BAREBOX_CMD_HELP_OPT ("-n <numbitflips>", "Specify maximum number of bitflips to generate")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(nand_bitflip)
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.cmd = do_nand_bitflip,
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BAREBOX_CMD_DESC("Create bitflips on Nand pages")
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BAREBOX_CMD_OPTS("NANDDEV")
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BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
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BAREBOX_CMD_HELP(cmd_nand_bitflip_help)
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BAREBOX_CMD_END
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