1 // SPDX-License-Identifier: GPL-2.0
2 #define pr_fmt(fmt) "mtd_test: " fmt
4 #include <linux/module.h>
5 #include <linux/sched.h>
6 #include <linux/printk.h>
10 int mtdtest_erase_eraseblock(struct mtd_info *mtd, unsigned int ebnum)
14 loff_t addr = (loff_t)ebnum * mtd->erasesize;
16 memset(&ei, 0, sizeof(struct erase_info));
18 ei.len = mtd->erasesize;
20 err = mtd_erase(mtd, &ei);
22 pr_info("error %d while erasing EB %d\n", err, ebnum);
29 static int is_block_bad(struct mtd_info *mtd, unsigned int ebnum)
32 loff_t addr = (loff_t)ebnum * mtd->erasesize;
34 ret = mtd_block_isbad(mtd, addr);
36 pr_info("block %d is bad\n", ebnum);
41 int mtdtest_scan_for_bad_eraseblocks(struct mtd_info *mtd, unsigned char *bbt,
42 unsigned int eb, int ebcnt)
46 if (!mtd_can_have_bb(mtd))
49 pr_info("scanning for bad eraseblocks\n");
50 for (i = 0; i < ebcnt; ++i) {
51 bbt[i] = is_block_bad(mtd, eb + i) ? 1 : 0;
56 pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
61 int mtdtest_erase_good_eraseblocks(struct mtd_info *mtd, unsigned char *bbt,
62 unsigned int eb, int ebcnt)
67 for (i = 0; i < ebcnt; ++i) {
70 err = mtdtest_erase_eraseblock(mtd, eb + i);
79 int mtdtest_read(struct mtd_info *mtd, loff_t addr, size_t size, void *buf)
84 err = mtd_read(mtd, addr, size, &read, buf);
85 /* Ignore corrected ECC errors */
86 if (mtd_is_bitflip(err))
88 if (!err && read != size)
91 pr_err("error: read failed at %#llx\n", addr);
96 int mtdtest_write(struct mtd_info *mtd, loff_t addr, size_t size,
102 err = mtd_write(mtd, addr, size, &written, buf);
103 if (!err && written != size)
106 pr_err("error: write failed at %#llx\n", addr);