1*b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2084db4b0SAkinobu Mita #define pr_fmt(fmt) "mtd_test: " fmt 3084db4b0SAkinobu Mita 4084db4b0SAkinobu Mita #include <linux/module.h> 5084db4b0SAkinobu Mita #include <linux/sched.h> 6084db4b0SAkinobu Mita #include <linux/printk.h> 7084db4b0SAkinobu Mita 8084db4b0SAkinobu Mita #include "mtd_test.h" 9084db4b0SAkinobu Mita 10084db4b0SAkinobu Mita int mtdtest_erase_eraseblock(struct mtd_info *mtd, unsigned int ebnum) 11084db4b0SAkinobu Mita { 12084db4b0SAkinobu Mita int err; 13084db4b0SAkinobu Mita struct erase_info ei; 141001ff7aSBrian Norris loff_t addr = (loff_t)ebnum * mtd->erasesize; 15084db4b0SAkinobu Mita 16084db4b0SAkinobu Mita memset(&ei, 0, sizeof(struct erase_info)); 17084db4b0SAkinobu Mita ei.addr = addr; 18084db4b0SAkinobu Mita ei.len = mtd->erasesize; 19084db4b0SAkinobu Mita 20084db4b0SAkinobu Mita err = mtd_erase(mtd, &ei); 21084db4b0SAkinobu Mita if (err) { 22084db4b0SAkinobu Mita pr_info("error %d while erasing EB %d\n", err, ebnum); 23084db4b0SAkinobu Mita return err; 24084db4b0SAkinobu Mita } 25084db4b0SAkinobu Mita 26084db4b0SAkinobu Mita return 0; 27084db4b0SAkinobu Mita } 28084db4b0SAkinobu Mita 29084db4b0SAkinobu Mita static int is_block_bad(struct mtd_info *mtd, unsigned int ebnum) 30084db4b0SAkinobu Mita { 31084db4b0SAkinobu Mita int ret; 321001ff7aSBrian Norris loff_t addr = (loff_t)ebnum * mtd->erasesize; 33084db4b0SAkinobu Mita 34084db4b0SAkinobu Mita ret = mtd_block_isbad(mtd, addr); 35084db4b0SAkinobu Mita if (ret) 36084db4b0SAkinobu Mita pr_info("block %d is bad\n", ebnum); 37084db4b0SAkinobu Mita 38084db4b0SAkinobu Mita return ret; 39084db4b0SAkinobu Mita } 40084db4b0SAkinobu Mita 41084db4b0SAkinobu Mita int mtdtest_scan_for_bad_eraseblocks(struct mtd_info *mtd, unsigned char *bbt, 42084db4b0SAkinobu Mita unsigned int eb, int ebcnt) 43084db4b0SAkinobu Mita { 44084db4b0SAkinobu Mita int i, bad = 0; 45084db4b0SAkinobu Mita 46084db4b0SAkinobu Mita if (!mtd_can_have_bb(mtd)) 47084db4b0SAkinobu Mita return 0; 48084db4b0SAkinobu Mita 49084db4b0SAkinobu Mita pr_info("scanning for bad eraseblocks\n"); 50084db4b0SAkinobu Mita for (i = 0; i < ebcnt; ++i) { 51084db4b0SAkinobu Mita bbt[i] = is_block_bad(mtd, eb + i) ? 1 : 0; 52084db4b0SAkinobu Mita if (bbt[i]) 53084db4b0SAkinobu Mita bad += 1; 54084db4b0SAkinobu Mita cond_resched(); 55084db4b0SAkinobu Mita } 56084db4b0SAkinobu Mita pr_info("scanned %d eraseblocks, %d are bad\n", i, bad); 57084db4b0SAkinobu Mita 58084db4b0SAkinobu Mita return 0; 59084db4b0SAkinobu Mita } 60084db4b0SAkinobu Mita 61084db4b0SAkinobu Mita int mtdtest_erase_good_eraseblocks(struct mtd_info *mtd, unsigned char *bbt, 62084db4b0SAkinobu Mita unsigned int eb, int ebcnt) 63084db4b0SAkinobu Mita { 64084db4b0SAkinobu Mita int err; 65084db4b0SAkinobu Mita unsigned int i; 66084db4b0SAkinobu Mita 67084db4b0SAkinobu Mita for (i = 0; i < ebcnt; ++i) { 68084db4b0SAkinobu Mita if (bbt[i]) 69084db4b0SAkinobu Mita continue; 70084db4b0SAkinobu Mita err = mtdtest_erase_eraseblock(mtd, eb + i); 71084db4b0SAkinobu Mita if (err) 72084db4b0SAkinobu Mita return err; 73084db4b0SAkinobu Mita cond_resched(); 74084db4b0SAkinobu Mita } 75084db4b0SAkinobu Mita 76084db4b0SAkinobu Mita return 0; 77084db4b0SAkinobu Mita } 78084db4b0SAkinobu Mita 79084db4b0SAkinobu Mita int mtdtest_read(struct mtd_info *mtd, loff_t addr, size_t size, void *buf) 80084db4b0SAkinobu Mita { 81084db4b0SAkinobu Mita size_t read; 82084db4b0SAkinobu Mita int err; 83084db4b0SAkinobu Mita 84084db4b0SAkinobu Mita err = mtd_read(mtd, addr, size, &read, buf); 85084db4b0SAkinobu Mita /* Ignore corrected ECC errors */ 86084db4b0SAkinobu Mita if (mtd_is_bitflip(err)) 87084db4b0SAkinobu Mita err = 0; 88084db4b0SAkinobu Mita if (!err && read != size) 89084db4b0SAkinobu Mita err = -EIO; 90abc173adSAkinobu Mita if (err) 91abc173adSAkinobu Mita pr_err("error: read failed at %#llx\n", addr); 92084db4b0SAkinobu Mita 93084db4b0SAkinobu Mita return err; 94084db4b0SAkinobu Mita } 95084db4b0SAkinobu Mita 96084db4b0SAkinobu Mita int mtdtest_write(struct mtd_info *mtd, loff_t addr, size_t size, 97084db4b0SAkinobu Mita const void *buf) 98084db4b0SAkinobu Mita { 99084db4b0SAkinobu Mita size_t written; 100084db4b0SAkinobu Mita int err; 101084db4b0SAkinobu Mita 102084db4b0SAkinobu Mita err = mtd_write(mtd, addr, size, &written, buf); 103084db4b0SAkinobu Mita if (!err && written != size) 104084db4b0SAkinobu Mita err = -EIO; 1058a9f4aa3SAkinobu Mita if (err) 1068a9f4aa3SAkinobu Mita pr_err("error: write failed at %#llx\n", addr); 107084db4b0SAkinobu Mita 108084db4b0SAkinobu Mita return err; 109084db4b0SAkinobu Mita } 110