1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2006-2007 Nokia Corporation
5  * Test sub-page read and write on MTD device.
6  * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
22 static int dev = -EINVAL;
47 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in write_eraseblock()
58 		return err ? err : -1;  in write_eraseblock()
72 		return err ? err : -1;  in write_eraseblock()
81 	int err = 0, k;  in write_eraseblock2()  local
82 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in write_eraseblock2()
84 	for (k = 1; k < 33; ++k) {  in write_eraseblock2()
85 		if (addr + (subpgsize * k) > (loff_t)(ebnum + 1) * mtd->erasesize)  in write_eraseblock2()
87 		prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);  in write_eraseblock2()
88 		err = mtd_write(mtd, addr, subpgsize * k, &written, writebuf);  in write_eraseblock2()
89 		if (unlikely(err || written != subpgsize * k)) {  in write_eraseblock2()
92 			if (written != subpgsize * k) {  in write_eraseblock2()
94 				       subpgsize * k);  in write_eraseblock2()
98 			return err ? err : -1;  in write_eraseblock2()
100 		addr += subpgsize * k;  in write_eraseblock2()
111 		for (j = 0; i < subpgsize && j < 32; ++i, ++j)  in print_subpage()
121 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in verify_eraseblock()
134 			return err ? err : -1;  in verify_eraseblock()
140 		pr_info("------------- written----------------\n");  in verify_eraseblock()
142 		pr_info("------------- read ------------------\n");  in verify_eraseblock()
144 		pr_info("-------------------------------------\n");  in verify_eraseblock()
161 			return err ? err : -1;  in verify_eraseblock()
167 		pr_info("------------- written----------------\n");  in verify_eraseblock()
169 		pr_info("------------- read ------------------\n");  in verify_eraseblock()
171 		pr_info("-------------------------------------\n");  in verify_eraseblock()
181 	int err = 0, k;  in verify_eraseblock2()  local
182 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in verify_eraseblock2()
184 	for (k = 1; k < 33; ++k) {  in verify_eraseblock2()
185 		if (addr + (subpgsize * k) > (loff_t)(ebnum + 1) * mtd->erasesize)  in verify_eraseblock2()
187 		prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);  in verify_eraseblock2()
188 		clear_data(readbuf, subpgsize * k);  in verify_eraseblock2()
189 		err = mtd_read(mtd, addr, subpgsize * k, &read, readbuf);  in verify_eraseblock2()
190 		if (unlikely(err || read != subpgsize * k)) {  in verify_eraseblock2()
191 			if (mtd_is_bitflip(err) && read == subpgsize * k) {  in verify_eraseblock2()
198 				return err ? err : -1;  in verify_eraseblock2()
201 		if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) {  in verify_eraseblock2()
206 		addr += subpgsize * k;  in verify_eraseblock2()
217 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in verify_eraseblock_ff()
220 	for (j = 0; j < mtd->erasesize / subpgsize; ++j) {  in verify_eraseblock_ff()
231 				return err ? err : -1;  in verify_eraseblock_ff()
278 		pr_info("Please specify a valid mtd-device via module parameter\n");  in mtd_subpagetest_init()
280 		return -EINVAL;  in mtd_subpagetest_init()
297 	subpgsize = mtd->writesize >> mtd->subpage_sft;  in mtd_subpagetest_init()
298 	tmp = mtd->size;  in mtd_subpagetest_init()
299 	do_div(tmp, mtd->erasesize);  in mtd_subpagetest_init()
301 	pgcnt = mtd->erasesize / mtd->writesize;  in mtd_subpagetest_init()
306 	       (unsigned long long)mtd->size, mtd->erasesize,  in mtd_subpagetest_init()
307 	       mtd->writesize, subpgsize, ebcnt, pgcnt, mtd->oobsize);  in mtd_subpagetest_init()
309 	err = -ENOMEM;  in mtd_subpagetest_init()
310 	bufsize = subpgsize * 32;  in mtd_subpagetest_init()