5  * Test read and write speed of a MTD device.
17 #include <linux/mtd/mtd.h>
26 MODULE_PARM_DESC(dev, "MTD device number to use");
33 static struct mtd_info *mtd;  variable
47 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in multiblock_erase()
51 	ei.len  = mtd->erasesize * blocks;  in multiblock_erase()
53 	err = mtd_erase(mtd, &ei);  in multiblock_erase()
65 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in write_eraseblock()
67 	return mtdtest_write(mtd, addr, mtd->erasesize, iobuf);  in write_eraseblock()
73 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in write_eraseblock_by_page()
77 		err = mtdtest_write(mtd, addr, pgsize, buf);  in write_eraseblock_by_page()
91 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in write_eraseblock_by_2pages()
95 		err = mtdtest_write(mtd, addr, sz, buf);  in write_eraseblock_by_2pages()
102 		err = mtdtest_write(mtd, addr, pgsize, buf);  in write_eraseblock_by_2pages()
109 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in read_eraseblock()
111 	return mtdtest_read(mtd, addr, mtd->erasesize, iobuf);  in read_eraseblock()
117 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in read_eraseblock_by_page()
121 		err = mtdtest_read(mtd, addr, pgsize, buf);  in read_eraseblock_by_page()
135 	loff_t addr = (loff_t)ebnum * mtd->erasesize;  in read_eraseblock_by_2pages()
139 		err = mtdtest_read(mtd, addr, sz, buf);  in read_eraseblock_by_2pages()
146 		err = mtdtest_read(mtd, addr, pgsize, buf);  in read_eraseblock_by_2pages()
169 	k = (uint64_t)goodebcnt * (mtd->erasesize / 1024) * 1000;  in calc_speed()
184 		pr_info("Please specify a valid mtd-device via module parameter\n");  in mtd_speedtest_init()
185 		pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");  in mtd_speedtest_init()
190 		pr_info("MTD device: %d    count: %d\n", dev, count);  in mtd_speedtest_init()
192 		pr_info("MTD device: %d\n", dev);  in mtd_speedtest_init()
194 	mtd = get_mtd_device(NULL, dev);  in mtd_speedtest_init()
195 	if (IS_ERR(mtd)) {  in mtd_speedtest_init()
196 		err = PTR_ERR(mtd);  in mtd_speedtest_init()
197 		pr_err("error: cannot get MTD device\n");  in mtd_speedtest_init()
201 	if (mtd->writesize == 1) {  in mtd_speedtest_init()
206 		pgsize = mtd->writesize;  in mtd_speedtest_init()
208 	tmp = mtd->size;  in mtd_speedtest_init()
209 	do_div(tmp, mtd->erasesize);  in mtd_speedtest_init()
211 	pgcnt = mtd->erasesize / pgsize;  in mtd_speedtest_init()
213 	pr_info("MTD device size %llu, eraseblock size %u, "  in mtd_speedtest_init()
216 	       (unsigned long long)mtd->size, mtd->erasesize,  in mtd_speedtest_init()
217 	       pgsize, ebcnt, pgcnt, mtd->oobsize);  in mtd_speedtest_init()
223 	iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);  in mtd_speedtest_init()
227 	prandom_bytes(iobuf, mtd->erasesize);  in mtd_speedtest_init()
232 	err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_speedtest_init()
240 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_speedtest_init()
280 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_speedtest_init()
320 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_speedtest_init()
363 	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);  in mtd_speedtest_init()
403 	put_mtd_device(mtd);  in mtd_speedtest_init()