5  * Test OOB read and write on MTD device.
17 #include <linux/mtd/mtd.h>
27 MODULE_PARM_DESC(dev, "MTD device number to use");
31 static struct mtd_info *mtd;  variable
61 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in write_eraseblock()
64 	for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {  in write_eraseblock()
73 		err = mtd_write_oob(mtd, addr, &ops);  in write_eraseblock()
170 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in verify_eraseblock()
174 	for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {  in verify_eraseblock()
183 		err = mtd_read_oob(mtd, addr, &ops);  in verify_eraseblock()
209 		if (use_offset != 0 || use_len < mtd->oobavail) {  in verify_eraseblock()
215 			ops.ooblen    = mtd->oobavail;  in verify_eraseblock()
220 			err = mtd_read_oob(mtd, addr, &ops);  in verify_eraseblock()
224 			if (err || ops.oobretlen != mtd->oobavail) {  in verify_eraseblock()
241 					      mtd->oobavail - k);  in verify_eraseblock()
265 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in verify_eraseblock_in_one_go()
266 	size_t len = mtd->oobavail * pgcnt;  in verify_eraseblock_in_one_go()
267 	size_t oobavail = mtd->oobavail;  in verify_eraseblock_in_one_go()
282 	err = mtd_read_oob(mtd, addr, &ops);  in verify_eraseblock_in_one_go()
294 	for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {  in verify_eraseblock_in_one_go()
348 		pr_info("Please specify a valid mtd-device via module parameter\n");  in mtd_oobtest_init()
349 		pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");  in mtd_oobtest_init()
353 	pr_info("MTD device: %d\n", dev);  in mtd_oobtest_init()
355 	mtd = get_mtd_device(NULL, dev);  in mtd_oobtest_init()
356 	if (IS_ERR(mtd)) {  in mtd_oobtest_init()
357 		err = PTR_ERR(mtd);  in mtd_oobtest_init()
358 		pr_err("error: cannot get MTD device\n");  in mtd_oobtest_init()
362 	if (!mtd_type_is_nand(mtd)) {  in mtd_oobtest_init()
367 	tmp = mtd->size;  in mtd_oobtest_init()
368 	do_div(tmp, mtd->erasesize);  in mtd_oobtest_init()
370 	pgcnt = mtd->erasesize / mtd->writesize;  in mtd_oobtest_init()
372 	pr_info("MTD device size %llu, eraseblock size %u, "  in mtd_oobtest_init()
375 	       (unsigned long long)mtd->size, mtd->erasesize,  in mtd_oobtest_init()
376 	       mtd->writesize, ebcnt, pgcnt, mtd->oobsize);  in mtd_oobtest_init()
379 	readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);  in mtd_oobtest_init()
382 	writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);  in mtd_oobtest_init()
389 	err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_oobtest_init()
394 	use_len = mtd->oobavail;  in mtd_oobtest_init()
395 	use_len_max = mtd->oobavail;  in mtd_oobtest_init()
401 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_oobtest_init()
421 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_oobtest_init()
454 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_oobtest_init()
460 	use_len = mtd->oobavail;  in mtd_oobtest_init()
461 	use_len_max = mtd->oobavail;  in mtd_oobtest_init()
471 	use_len = mtd->oobavail;  in mtd_oobtest_init()
472 	use_len_max = mtd->oobavail;  in mtd_oobtest_init()
480 	use_len = mtd->oobavail;  in mtd_oobtest_init()
481 	use_len_max = mtd->oobavail;  in mtd_oobtest_init()
487 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_oobtest_init()
493 		addr0 += mtd->erasesize;  in mtd_oobtest_init()
501 	ops.ooboffs   = mtd->oobavail;  in mtd_oobtest_init()
506 	err = mtd_write_oob(mtd, addr0, &ops);  in mtd_oobtest_init()
520 	ops.ooboffs   = mtd->oobavail;  in mtd_oobtest_init()
525 	err = mtd_read_oob(mtd, addr0, &ops);  in mtd_oobtest_init()
544 		ops.ooblen    = mtd->oobavail + 1;  in mtd_oobtest_init()
551 		err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops);  in mtd_oobtest_init()
563 		ops.ooblen    = mtd->oobavail + 1;  in mtd_oobtest_init()
570 		err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);  in mtd_oobtest_init()
581 		err = mtdtest_erase_eraseblock(mtd, ebcnt - 1);  in mtd_oobtest_init()
589 		ops.ooblen    = mtd->oobavail;  in mtd_oobtest_init()
596 		err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops);  in mtd_oobtest_init()
608 		ops.ooblen    = mtd->oobavail;  in mtd_oobtest_init()
615 		err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);  in mtd_oobtest_init()
631 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_oobtest_init()
641 		size_t sz = mtd->oobavail;  in mtd_oobtest_init()
644 		addr = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize;  in mtd_oobtest_init()
655 			err = mtd_write_oob(mtd, addr, &ops);  in mtd_oobtest_init()
665 			addr += mtd->writesize;  in mtd_oobtest_init()
676 		prandom_bytes_state(&rnd_state, writebuf, mtd->oobavail * 2);  in mtd_oobtest_init()
677 		addr = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize;  in mtd_oobtest_init()
681 		ops.ooblen    = mtd->oobavail * 2;  in mtd_oobtest_init()
686 		err = mtd_read_oob(mtd, addr, &ops);  in mtd_oobtest_init()
693 			       mtd->oobavail * 2)) {  in mtd_oobtest_init()
717 	put_mtd_device(mtd);  in mtd_oobtest_init()