3  * MTD Oops/Panic logger
22 #include <linux/mtd/mtd.h>
25 /* Maximum MTD partition size */
31 		"record size for MTD OOPS pages in bytes (default 4096)");
36 		"name or index number of the MTD device to use");
58 	struct mtd_info *mtd;  member
85 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_erase_block()  local
86 	u32 start_page_offset = mtd_div_by_eb(offset, mtd) * mtd->erasesize;  in mtdoops_erase_block()
88 	u32 erase_pages = mtd->erasesize / record_size;  in mtdoops_erase_block()
94 	erase.len = mtd->erasesize;  in mtdoops_erase_block()
96 	ret = mtd_erase(mtd, &erase);  in mtdoops_erase_block()
113 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_erase()  local
117 	if (!mtd)  in mtdoops_erase()
120 	mod = (cxt->nextpage * record_size) % mtd->erasesize;  in mtdoops_erase()
122 		cxt->nextpage = cxt->nextpage + ((mtd->erasesize - mod) / record_size);  in mtdoops_erase()
127 	while ((ret = mtd_block_isbad(mtd, cxt->nextpage * record_size)) > 0) {  in mtdoops_erase()
132 		cxt->nextpage = cxt->nextpage + (mtd->erasesize / record_size);  in mtdoops_erase()
135 		if (i == cxt->oops_pages / (mtd->erasesize / record_size)) {  in mtdoops_erase()
156 		ret = mtd_block_markbad(mtd, cxt->nextpage * record_size);  in mtdoops_erase()
201 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_write()  local
216 		ret = mtd_panic_write(mtd, cxt->nextpage * record_size,  in mtdoops_write()
223 		ret = mtd_write(mtd, cxt->nextpage * record_size,  in mtdoops_write()
247 	struct mtd_info *mtd = cxt->mtd;  in find_next_position()  local
254 		if (mtd_block_isbad(mtd, page * record_size))  in find_next_position()
258 		ret = mtd_read(mtd, page * record_size, sizeof(hdr),  in find_next_position()
329 static void mtdoops_notify_add(struct mtd_info *mtd)  in mtdoops_notify_add()  argument
332 	u64 mtdoops_pages = div_u64(mtd->size, record_size);  in mtdoops_notify_add()
335 	if (!strcmp(mtd->name, mtddev))  in mtdoops_notify_add()
336 		cxt->mtd_index = mtd->index;  in mtdoops_notify_add()
338 	if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)  in mtdoops_notify_add()
341 	if (mtd->size < mtd->erasesize * 2) {  in mtdoops_notify_add()
342 		pr_err("MTD partition %d not big enough for mtdoops\n",  in mtdoops_notify_add()
343 		       mtd->index);  in mtdoops_notify_add()
346 	if (mtd->erasesize < record_size) {  in mtdoops_notify_add()
347 		pr_err("eraseblock size of MTD partition %d too small\n",  in mtdoops_notify_add()
348 		       mtd->index);  in mtdoops_notify_add()
351 	if (mtd->size > MTDOOPS_MAX_MTD_SIZE) {  in mtdoops_notify_add()
352 		pr_err("mtd%d is too large (limit is %d MiB)\n",  in mtdoops_notify_add()
353 		       mtd->index, MTDOOPS_MAX_MTD_SIZE / 1024 / 1024);  in mtdoops_notify_add()
377 	cxt->mtd = mtd;  in mtdoops_notify_add()
378 	cxt->oops_pages = (int)mtd->size / record_size;  in mtdoops_notify_add()
380 	pr_info("Attached to MTD device %d\n", mtd->index);  in mtdoops_notify_add()
383 static void mtdoops_notify_remove(struct mtd_info *mtd)  in mtdoops_notify_remove()  argument
387 	if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)  in mtdoops_notify_remove()
393 	cxt->mtd = NULL;  in mtdoops_notify_remove()
411 		pr_err("mtd device (mtddev=name/number) must be supplied\n");  in mtdoops_init()
423 	/* Setup the MTD device to use */  in mtdoops_init()
457 MODULE_DESCRIPTION("MTD Oops/Panic console logger/driver");