static int __init mtd_oobtest_init(void) { int err = 0; unsigned int i; uint64_t tmp; struct mtd_oob_ops ops; loff_t addr = 0, addr0; printk(KERN_INFO "\n"); printk(KERN_INFO "=================================================\n"); printk(PRINT_PREF "MTD device: %d\n", dev); mtd = get_mtd_device(NULL, dev); if (IS_ERR(mtd)) { err = PTR_ERR(mtd); printk(PRINT_PREF "error: cannot get MTD device\n"); return err; } if (mtd->type != MTD_NANDFLASH) { printk(PRINT_PREF "this test requires NAND flash\n"); goto out; } tmp = mtd->size; do_div(tmp, mtd->erasesize); ebcnt = tmp; pgcnt = mtd->erasesize / mtd->writesize; printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, " "page size %u, count of eraseblocks %u, pages per " "eraseblock %u, OOB size %u\n", (unsigned long long)mtd->size, mtd->erasesize, mtd->writesize, ebcnt, pgcnt, mtd->oobsize); err = -ENOMEM; mtd->erasesize = mtd->erasesize; readbuf = kmalloc(mtd->erasesize, GFP_KERNEL); if (!readbuf) { printk(PRINT_PREF "error: cannot allocate memory\n"); goto out; } writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); if (!writebuf) { printk(PRINT_PREF "error: cannot allocate memory\n"); goto out; } err = scan_for_bad_eraseblocks(); if (err) goto out; use_offset = 0; use_len = mtd->ecclayout->oobavail; use_len_max = mtd->ecclayout->oobavail; vary_offset = 0; printk(PRINT_PREF "test 1 of 5\n"); err = erase_whole_device(); if (err) goto out; simple_srand(1); err = write_whole_device(); if (err) goto out; simple_srand(1); err = verify_all_eraseblocks(); if (err) goto out; printk(PRINT_PREF "test 2 of 5\n"); err = erase_whole_device(); if (err) goto out; simple_srand(3); err = write_whole_device(); if (err) goto out; simple_srand(3); printk(PRINT_PREF "verifying all eraseblocks\n"); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = verify_eraseblock_in_one_go(i); if (err) goto out; if (i % 256 == 0) printk(PRINT_PREF "verified up to eraseblock %u\n", i); cond_resched(); } printk(PRINT_PREF "verified %u eraseblocks\n", i); printk(PRINT_PREF "test 3 of 5\n"); err = erase_whole_device(); if (err) goto out; use_offset = 0; use_len = mtd->ecclayout->oobavail; use_len_max = mtd->ecclayout->oobavail; vary_offset = 1; simple_srand(5); printk(PRINT_PREF "writing OOBs of whole device\n"); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = write_eraseblock(i); if (err) goto out; if (i % 256 == 0) printk(PRINT_PREF "written up to eraseblock %u\n", i); cond_resched(); } printk(PRINT_PREF "written %u eraseblocks\n", i); use_offset = 0; use_len = mtd->ecclayout->oobavail; use_len_max = mtd->ecclayout->oobavail; vary_offset = 1; simple_srand(5); err = verify_all_eraseblocks(); if (err) goto out; use_offset = 0; use_len = mtd->ecclayout->oobavail; use_len_max = mtd->ecclayout->oobavail; vary_offset = 0; printk(PRINT_PREF "test 4 of 5\n"); err = erase_whole_device(); if (err) goto out; addr0 = 0; for (i = 0; i < ebcnt && bbt[i]; ++i) addr0 += mtd->erasesize; ops.mode = MTD_OOB_AUTO; ops.len = 0; ops.retlen = 0; ops.ooblen = 1; ops.oobretlen = 0; ops.ooboffs = mtd->ecclayout->oobavail; ops.datbuf = NULL; ops.oobbuf = writebuf; printk(PRINT_PREF "attempting to start write past end of OOB\n"); printk(PRINT_PREF "an error is expected...\n"); err = mtd->write_oob(mtd, addr0, &ops); if (err) { printk(PRINT_PREF "error occurred as expected\n"); err = 0; } else { printk(PRINT_PREF "error: can write past end of OOB\n"); errcnt += 1; } ops.mode = MTD_OOB_AUTO; ops.len = 0; ops.retlen = 0; ops.ooblen = 1; ops.oobretlen = 0; ops.ooboffs = mtd->ecclayout->oobavail; ops.datbuf = NULL; ops.oobbuf = readbuf; printk(PRINT_PREF "attempting to start read past end of OOB\n"); printk(PRINT_PREF "an error is expected...\n"); err = mtd->read_oob(mtd, addr0, &ops); if (err) { printk(PRINT_PREF "error occurred as expected\n"); err = 0; } else { printk(PRINT_PREF "error: can read past end of OOB\n"); errcnt += 1; } if (bbt[ebcnt - 1]) printk(PRINT_PREF "skipping end of device tests because last " "block is bad\n"); else { ops.mode = MTD_OOB_AUTO; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail + 1; ops.oobretlen = 0; ops.ooboffs = 0; ops.datbuf = NULL; ops.oobbuf = writebuf; printk(PRINT_PREF "attempting to write past end of device\n"); printk(PRINT_PREF "an error is expected...\n"); err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops); if (err) { printk(PRINT_PREF "error occurred as expected\n"); err = 0; } else { printk(PRINT_PREF "error: wrote past end of device\n"); errcnt += 1; } ops.mode = MTD_OOB_AUTO; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail + 1; ops.oobretlen = 0; ops.ooboffs = 0; ops.datbuf = NULL; ops.oobbuf = readbuf; printk(PRINT_PREF "attempting to read past end of device\n"); printk(PRINT_PREF "an error is expected...\n"); err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops); if (err) { printk(PRINT_PREF "error occurred as expected\n"); err = 0; } else { printk(PRINT_PREF "error: read past end of device\n"); errcnt += 1; } err = erase_eraseblock(ebcnt - 1); if (err) goto out; ops.mode = MTD_OOB_AUTO; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail; ops.oobretlen = 0; ops.ooboffs = 1; ops.datbuf = NULL; ops.oobbuf = writebuf; printk(PRINT_PREF "attempting to write past end of device\n"); printk(PRINT_PREF "an error is expected...\n"); err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops); if (err) { printk(PRINT_PREF "error occurred as expected\n"); err = 0; } else { printk(PRINT_PREF "error: wrote past end of device\n"); errcnt += 1; } ops.mode = MTD_OOB_AUTO; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail; ops.oobretlen = 0; ops.ooboffs = 1; ops.datbuf = NULL; ops.oobbuf = readbuf; printk(PRINT_PREF "attempting to read past end of device\n"); printk(PRINT_PREF "an error is expected...\n"); err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops); if (err) { printk(PRINT_PREF "error occurred as expected\n"); err = 0; } else { printk(PRINT_PREF "error: read past end of device\n"); errcnt += 1; } } printk(PRINT_PREF "test 5 of 5\n"); err = erase_whole_device(); if (err) goto out; simple_srand(11); printk(PRINT_PREF "writing OOBs of whole device\n"); for (i = 0; i < ebcnt - 1; ++i) { int cnt = 2; int pg; size_t sz = mtd->ecclayout->oobavail; if (bbt[i] || bbt[i + 1]) continue; addr = (i + 1) * mtd->erasesize - mtd->writesize; for (pg = 0; pg < cnt; ++pg) { set_random_data(writebuf, sz); ops.mode = MTD_OOB_AUTO; ops.len = 0; ops.retlen = 0; ops.ooblen = sz; ops.oobretlen = 0; ops.ooboffs = 0; ops.datbuf = NULL; ops.oobbuf = writebuf; err = mtd->write_oob(mtd, addr, &ops); if (err) goto out; if (i % 256 == 0) printk(PRINT_PREF "written up to eraseblock " "%u\n", i); cond_resched(); addr += mtd->writesize; } } printk(PRINT_PREF "written %u eraseblocks\n", i); simple_srand(11); printk(PRINT_PREF "verifying all eraseblocks\n"); for (i = 0; i < ebcnt - 1; ++i) { if (bbt[i] || bbt[i + 1]) continue; set_random_data(writebuf, mtd->ecclayout->oobavail * 2); addr = (i + 1) * mtd->erasesize - mtd->writesize; ops.mode = MTD_OOB_AUTO; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail * 2; ops.oobretlen = 0; ops.ooboffs = 0; ops.datbuf = NULL; ops.oobbuf = readbuf; err = mtd->read_oob(mtd, addr, &ops); if (err) goto out; if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) { printk(PRINT_PREF "error: verify failed at %#llx\n", (long long)addr); errcnt += 1; if (errcnt > 1000) { printk(PRINT_PREF "error: too many errors\n"); goto out; } } if (i % 256 == 0) printk(PRINT_PREF "verified up to eraseblock %u\n", i); cond_resched(); } printk(PRINT_PREF "verified %u eraseblocks\n", i); printk(PRINT_PREF "finished with %d errors\n", errcnt); out: kfree(bbt); kfree(writebuf); kfree(readbuf); put_mtd_device(mtd); if (err) printk(PRINT_PREF "error %d occurred\n", err); printk(KERN_INFO "=================================================\n"); return err; }
static int __init mtd_oobtest_init(void) { int err = 0; unsigned int i; uint64_t tmp; struct mtd_oob_ops ops; loff_t addr = 0, addr0; printk(KERN_INFO "\n"); printk(KERN_INFO "=================================================\n"); if (dev < 0) { pr_info("Please specify a valid mtd-device via module parameter\n"); pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n"); return -EINVAL; } pr_info("MTD device: %d\n", dev); mtd = get_mtd_device(NULL, dev); if (IS_ERR(mtd)) { err = PTR_ERR(mtd); pr_err("error: cannot get MTD device\n"); return err; } if (!mtd_type_is_nand(mtd)) { pr_info("this test requires NAND flash\n"); goto out; } tmp = mtd->size; do_div(tmp, mtd->erasesize); ebcnt = tmp; pgcnt = mtd->erasesize / mtd->writesize; pr_info("MTD device size %llu, eraseblock size %u, " "page size %u, count of eraseblocks %u, pages per " "eraseblock %u, OOB size %u\n", (unsigned long long)mtd->size, mtd->erasesize, mtd->writesize, ebcnt, pgcnt, mtd->oobsize); err = -ENOMEM; readbuf = kmalloc(mtd->erasesize, GFP_KERNEL); if (!readbuf) goto out; writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); if (!writebuf) goto out; bbt = kzalloc(ebcnt, GFP_KERNEL); if (!bbt) goto out; err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; use_offset = 0; use_len = mtd->ecclayout->oobavail; use_len_max = mtd->ecclayout->oobavail; vary_offset = 0; /* First test: write all OOB, read it back and verify */ pr_info("test 1 of 5\n"); err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; prandom_seed_state(&rnd_state, 1); err = write_whole_device(); if (err) goto out; prandom_seed_state(&rnd_state, 1); err = verify_all_eraseblocks(); if (err) goto out; /* * Second test: write all OOB, a block at a time, read it back and * verify. */ pr_info("test 2 of 5\n"); err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; prandom_seed_state(&rnd_state, 3); err = write_whole_device(); if (err) goto out; /* Check all eraseblocks */ prandom_seed_state(&rnd_state, 3); pr_info("verifying all eraseblocks\n"); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = verify_eraseblock_in_one_go(i); if (err) goto out; if (i % 256 == 0) pr_info("verified up to eraseblock %u\n", i); cond_resched(); } pr_info("verified %u eraseblocks\n", i); /* * Third test: write OOB at varying offsets and lengths, read it back * and verify. */ pr_info("test 3 of 5\n"); err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; /* Write all eraseblocks */ use_offset = 0; use_len = mtd->ecclayout->oobavail; use_len_max = mtd->ecclayout->oobavail; vary_offset = 1; prandom_seed_state(&rnd_state, 5); err = write_whole_device(); if (err) goto out; /* Check all eraseblocks */ use_offset = 0; use_len = mtd->ecclayout->oobavail; use_len_max = mtd->ecclayout->oobavail; vary_offset = 1; prandom_seed_state(&rnd_state, 5); err = verify_all_eraseblocks(); if (err) goto out; use_offset = 0; use_len = mtd->ecclayout->oobavail; use_len_max = mtd->ecclayout->oobavail; vary_offset = 0; /* Fourth test: try to write off end of device */ pr_info("test 4 of 5\n"); err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; addr0 = 0; for (i = 0; i < ebcnt && bbt[i]; ++i) addr0 += mtd->erasesize; /* Attempt to write off end of OOB */ ops.mode = MTD_OPS_AUTO_OOB; ops.len = 0; ops.retlen = 0; ops.ooblen = 1; ops.oobretlen = 0; ops.ooboffs = mtd->ecclayout->oobavail; ops.datbuf = NULL; ops.oobbuf = writebuf; pr_info("attempting to start write past end of OOB\n"); pr_info("an error is expected...\n"); err = mtd_write_oob(mtd, addr0, &ops); if (err) { pr_info("error occurred as expected\n"); err = 0; } else { pr_err("error: can write past end of OOB\n"); errcnt += 1; } /* Attempt to read off end of OOB */ ops.mode = MTD_OPS_AUTO_OOB; ops.len = 0; ops.retlen = 0; ops.ooblen = 1; ops.oobretlen = 0; ops.ooboffs = mtd->ecclayout->oobavail; ops.datbuf = NULL; ops.oobbuf = readbuf; pr_info("attempting to start read past end of OOB\n"); pr_info("an error is expected...\n"); err = mtd_read_oob(mtd, addr0, &ops); if (err) { pr_info("error occurred as expected\n"); err = 0; } else { pr_err("error: can read past end of OOB\n"); errcnt += 1; } if (bbt[ebcnt - 1]) pr_info("skipping end of device tests because last " "block is bad\n"); else { /* Attempt to write off end of device */ ops.mode = MTD_OPS_AUTO_OOB; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail + 1; ops.oobretlen = 0; ops.ooboffs = 0; ops.datbuf = NULL; ops.oobbuf = writebuf; pr_info("attempting to write past end of device\n"); pr_info("an error is expected...\n"); err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops); if (err) { pr_info("error occurred as expected\n"); err = 0; } else { pr_err("error: wrote past end of device\n"); errcnt += 1; } /* Attempt to read off end of device */ ops.mode = MTD_OPS_AUTO_OOB; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail + 1; ops.oobretlen = 0; ops.ooboffs = 0; ops.datbuf = NULL; ops.oobbuf = readbuf; pr_info("attempting to read past end of device\n"); pr_info("an error is expected...\n"); err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops); if (err) { pr_info("error occurred as expected\n"); err = 0; } else { pr_err("error: read past end of device\n"); errcnt += 1; } err = mtdtest_erase_eraseblock(mtd, ebcnt - 1); if (err) goto out; /* Attempt to write off end of device */ ops.mode = MTD_OPS_AUTO_OOB; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail; ops.oobretlen = 0; ops.ooboffs = 1; ops.datbuf = NULL; ops.oobbuf = writebuf; pr_info("attempting to write past end of device\n"); pr_info("an error is expected...\n"); err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops); if (err) { pr_info("error occurred as expected\n"); err = 0; } else { pr_err("error: wrote past end of device\n"); errcnt += 1; } /* Attempt to read off end of device */ ops.mode = MTD_OPS_AUTO_OOB; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail; ops.oobretlen = 0; ops.ooboffs = 1; ops.datbuf = NULL; ops.oobbuf = readbuf; pr_info("attempting to read past end of device\n"); pr_info("an error is expected...\n"); err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops); if (err) { pr_info("error occurred as expected\n"); err = 0; } else { pr_err("error: read past end of device\n"); errcnt += 1; } } /* Fifth test: write / read across block boundaries */ pr_info("test 5 of 5\n"); /* Erase all eraseblocks */ err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; /* Write all eraseblocks */ prandom_seed_state(&rnd_state, 11); pr_info("writing OOBs of whole device\n"); for (i = 0; i < ebcnt - 1; ++i) { int cnt = 2; int pg; size_t sz = mtd->ecclayout->oobavail; if (bbt[i] || bbt[i + 1]) continue; addr = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize; prandom_bytes_state(&rnd_state, writebuf, sz * cnt); for (pg = 0; pg < cnt; ++pg) { ops.mode = MTD_OPS_AUTO_OOB; ops.len = 0; ops.retlen = 0; ops.ooblen = sz; ops.oobretlen = 0; ops.ooboffs = 0; ops.datbuf = NULL; ops.oobbuf = writebuf + pg * sz; err = mtd_write_oob(mtd, addr, &ops); if (err) goto out; if (i % 256 == 0) pr_info("written up to eraseblock %u\n", i); cond_resched(); addr += mtd->writesize; } } pr_info("written %u eraseblocks\n", i); /* Check all eraseblocks */ prandom_seed_state(&rnd_state, 11); pr_info("verifying all eraseblocks\n"); for (i = 0; i < ebcnt - 1; ++i) { if (bbt[i] || bbt[i + 1]) continue; prandom_bytes_state(&rnd_state, writebuf, mtd->ecclayout->oobavail * 2); addr = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize; ops.mode = MTD_OPS_AUTO_OOB; ops.len = 0; ops.retlen = 0; ops.ooblen = mtd->ecclayout->oobavail * 2; ops.oobretlen = 0; ops.ooboffs = 0; ops.datbuf = NULL; ops.oobbuf = readbuf; err = mtd_read_oob(mtd, addr, &ops); if (err) goto out; if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) { pr_err("error: verify failed at %#llx\n", (long long)addr); errcnt += 1; if (errcnt > 1000) { pr_err("error: too many errors\n"); goto out; } } if (i % 256 == 0) pr_info("verified up to eraseblock %u\n", i); cond_resched(); } pr_info("verified %u eraseblocks\n", i); pr_info("finished with %d errors\n", errcnt); out: kfree(bbt); kfree(writebuf); kfree(readbuf); put_mtd_device(mtd); if (err) pr_info("error %d occurred\n", err); printk(KERN_INFO "=================================================\n"); return err; }