1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2006-2008 Artem Bityutskiy
4  * Copyright (C) 2006-2008 Jarkko Lavinen
5  * Copyright (C) 2006-2008 Adrian Hunter
40 static int dev = -EINVAL;
73 static void report_corrupt(unsigned char *read, unsigned char *written);
92 	size_t read;  in check_eraseblock()  local
93 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in check_eraseblock()
94 	size_t len = mtd->erasesize;  in check_eraseblock()
97 		addr = (loff_t)(ebnum + 1) * mtd->erasesize - pgcnt * pgsize;  in check_eraseblock()
102 	err = mtd_read(mtd, addr, len, &read, check_buf);  in check_eraseblock()
108 		       "read %zd\n", err, ebnum, read);  in check_eraseblock()
112 	if (read != len) {  in check_eraseblock()
113 		pr_err("failed to read %zd bytes from EB %d, "  in check_eraseblock()
114 		       "read only %zd, but no error reported\n",  in check_eraseblock()
115 		       len, ebnum, read);  in check_eraseblock()
116 		return -EIO;  in check_eraseblock()
120 		pr_err("read wrong data from EB %d\n", ebnum);  in check_eraseblock()
124 			/* Try read again */  in check_eraseblock()
126 			pr_info("re-try reading data from EB %d\n",  in check_eraseblock()
131 			       "give-up\n", RETRIES);  in check_eraseblock()
132 			return -EINVAL;  in check_eraseblock()
147 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in write_pattern()
148 	size_t len = mtd->erasesize;  in write_pattern()
151 		addr = (loff_t)(ebnum + 1) * mtd->erasesize - pgcnt * pgsize;  in write_pattern()
163 		return -EIO;  in write_pattern()
176 	pr_info("Warning: this program is trying to wear out your "  in tort_init()
180 		pr_info("Please specify a valid mtd-device via module parameter\n");  in tort_init()
182 		return -EINVAL;  in tort_init()
186 	pr_info("torture %d eraseblocks (%d-%d) of mtd%d\n",  in tort_init()
187 	       ebcnt, eb, eb + ebcnt - 1, dev);  in tort_init()
200 	if (mtd->writesize == 1) {  in tort_init()
205 		pgsize = mtd->writesize;  in tort_init()
207 	if (pgcnt && (pgcnt > mtd->erasesize / pgsize || pgcnt < 0)) {  in tort_init()
212 	err = -ENOMEM;  in tort_init()
213 	patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL);  in tort_init()
217 	patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL);  in tort_init()
221 	patt_FF = kmalloc(mtd->erasesize, GFP_KERNEL);  in tort_init()
225 	check_buf = kmalloc(mtd->erasesize, GFP_KERNEL);  in tort_init()
234 	memset(patt_FF, 0xFF, mtd->erasesize);  in tort_init()
235 	for (i = 0; i < mtd->erasesize / pgsize; i++) {  in tort_init()
247 		goto out;  in tort_init()
256 			goto out;  in tort_init()
261 				if (bad_ebs[i - eb])  in tort_init()
267 					goto out;  in tort_init()
272 					goto out;  in tort_init()
278 			if (bad_ebs[i - eb])  in tort_init()
286 				goto out;  in tort_init()
290 				goto out;  in tort_init()
296 				if (bad_ebs[i - eb])  in tort_init()
308 					goto out;  in tort_init()
313 					goto out;  in tort_init()
330 		if (!infinite && --cycles_count == 0)  in tort_init()
333 out:  in tort_init()
364 static void print_bufs(unsigned char *read, unsigned char *written, int start,
368  * Report the detailed information about how the read EB differs from what was
371 static void report_corrupt(unsigned char *read, unsigned char *written)  in report_corrupt()  argument
376 	size_t check_len = mtd->erasesize;  in report_corrupt()
383 		if (countdiffs(written, read, i, pgsize, &bytes,  in report_corrupt()
390 	       " what was read from flash and what was expected\n");  in report_corrupt()
395 		first = countdiffs(written, read, i, pgsize, &bytes,  in report_corrupt()
400 		printk("-------------------------------------------------------"  in report_corrupt()
401 		       "----------------------------------\n");  in report_corrupt()
405 		       (mtd->erasesize - check_len + i) / pgsize,  in report_corrupt()
409 		len = ((first + bytes) | 0x7) + 1 - offset;  in report_corrupt()
411 		print_bufs(read, written, offset, len);  in report_corrupt()
415 static void print_bufs(unsigned char *read, unsigned char *written, int start,  in print_bufs()  argument
421 	printk("Offset       Read                          Written\n");  in print_bufs()
426 			printk(" %02x", read[start + i + j1]);  in print_bufs()
427 			if (read[start + i + j1] != written[start + i + j1])  in print_bufs()
454 	int first = -1;  in countdiffs()