3  * MTD Oops/Panic logger
20 #include <linux/mtd/mtd.h>
23 /* Maximum MTD partition size */
29 		"record size for MTD OOPS pages in bytes (default 4096)");
34 		"name or index number of the MTD device to use");
56 	struct mtd_info *mtd;  member
83 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_erase_block()  local
84 	u32 start_page_offset = mtd_div_by_eb(offset, mtd) * mtd->erasesize;  in mtdoops_erase_block()
86 	u32 erase_pages = mtd->erasesize / record_size;  in mtdoops_erase_block()
92 	erase.len = mtd->erasesize;  in mtdoops_erase_block()
94 	ret = mtd_erase(mtd, &erase);  in mtdoops_erase_block()
132 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_workfunc_erase()  local
136 	if (!mtd)  in mtdoops_workfunc_erase()
139 	mod = (cxt->nextpage * record_size) % mtd->erasesize;  in mtdoops_workfunc_erase()
141 		cxt->nextpage = cxt->nextpage + ((mtd->erasesize - mod) / record_size);  in mtdoops_workfunc_erase()
146 	while ((ret = mtd_block_isbad(mtd, cxt->nextpage * record_size)) > 0) {  in mtdoops_workfunc_erase()
151 		cxt->nextpage = cxt->nextpage + (mtd->erasesize / record_size);  in mtdoops_workfunc_erase()
154 		if (i == cxt->oops_pages / (mtd->erasesize / record_size)) {  in mtdoops_workfunc_erase()
175 		ret = mtd_block_markbad(mtd, cxt->nextpage * record_size);  in mtdoops_workfunc_erase()
186 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_write()  local
201 		ret = mtd_panic_write(mtd, cxt->nextpage * record_size,  in mtdoops_write()
208 		ret = mtd_write(mtd, cxt->nextpage * record_size,  in mtdoops_write()
232 	struct mtd_info *mtd = cxt->mtd;  in find_next_position()  local
239 		if (mtd_block_isbad(mtd, page * record_size))  in find_next_position()
243 		ret = mtd_read(mtd, page * record_size, sizeof(hdr),  in find_next_position()
314 static void mtdoops_notify_add(struct mtd_info *mtd)  in mtdoops_notify_add()  argument
317 	u64 mtdoops_pages = div_u64(mtd->size, record_size);  in mtdoops_notify_add()
320 	if (!strcmp(mtd->name, mtddev))  in mtdoops_notify_add()
321 		cxt->mtd_index = mtd->index;  in mtdoops_notify_add()
323 	if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)  in mtdoops_notify_add()
326 	if (mtd->size < mtd->erasesize * 2) {  in mtdoops_notify_add()
327 		printk(KERN_ERR "mtdoops: MTD partition %d not big enough for mtdoops\n",  in mtdoops_notify_add()
328 		       mtd->index);  in mtdoops_notify_add()
331 	if (mtd->erasesize < record_size) {  in mtdoops_notify_add()
332 		printk(KERN_ERR "mtdoops: eraseblock size of MTD partition %d too small\n",  in mtdoops_notify_add()
333 		       mtd->index);  in mtdoops_notify_add()
336 	if (mtd->size > MTDOOPS_MAX_MTD_SIZE) {  in mtdoops_notify_add()
337 		printk(KERN_ERR "mtdoops: mtd%d is too large (limit is %d MiB)\n",  in mtdoops_notify_add()
338 		       mtd->index, MTDOOPS_MAX_MTD_SIZE / 1024 / 1024);  in mtdoops_notify_add()
362 	cxt->mtd = mtd;  in mtdoops_notify_add()
363 	cxt->oops_pages = (int)mtd->size / record_size;  in mtdoops_notify_add()
365 	printk(KERN_INFO "mtdoops: Attached to MTD device %d\n", mtd->index);  in mtdoops_notify_add()
368 static void mtdoops_notify_remove(struct mtd_info *mtd)  in mtdoops_notify_remove()  argument
372 	if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)  in mtdoops_notify_remove()
378 	cxt->mtd = NULL;  in mtdoops_notify_remove()
396 		printk(KERN_ERR "mtdoops: mtd device (mtddev=name/number) must be supplied\n");  in mtdoops_init()
408 	/* Setup the MTD device to use */  in mtdoops_init()
442 MODULE_DESCRIPTION("MTD Oops/Panic console logger/driver");