3  * MTD Oops/Panic logger
19 #include <linux/mtd/mtd.h>
22 /* 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");
49 	struct mtd_info *mtd;  member
75 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_erase_block()  local
76 	u32 start_page_offset = mtd_div_by_eb(offset, mtd) * mtd->erasesize;  in mtdoops_erase_block()
78 	u32 erase_pages = mtd->erasesize / record_size;  in mtdoops_erase_block()
84 	erase.len = mtd->erasesize;  in mtdoops_erase_block()
86 	ret = mtd_erase(mtd, &erase);  in mtdoops_erase_block()
124 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_workfunc_erase()  local
128 	if (!mtd)  in mtdoops_workfunc_erase()
131 	mod = (cxt->nextpage * record_size) % mtd->erasesize;  in mtdoops_workfunc_erase()
133 		cxt->nextpage = cxt->nextpage + ((mtd->erasesize - mod) / record_size);  in mtdoops_workfunc_erase()
138 	while ((ret = mtd_block_isbad(mtd, cxt->nextpage * record_size)) > 0) {  in mtdoops_workfunc_erase()
143 		cxt->nextpage = cxt->nextpage + (mtd->erasesize / record_size);  in mtdoops_workfunc_erase()
146 		if (i == cxt->oops_pages / (mtd->erasesize / record_size)) {  in mtdoops_workfunc_erase()
167 		ret = mtd_block_markbad(mtd, cxt->nextpage * record_size);  in mtdoops_workfunc_erase()
178 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_write()  local
189 		ret = mtd_panic_write(mtd, cxt->nextpage * record_size,  in mtdoops_write()
196 		ret = mtd_write(mtd, cxt->nextpage * record_size,  in mtdoops_write()
218 	struct mtd_info *mtd = cxt->mtd;  in find_next_position()  local
224 		if (mtd_block_isbad(mtd, page * record_size))  in find_next_position()
228 		ret = mtd_read(mtd, page * record_size, MTDOOPS_HEADER_SIZE,  in find_next_position()
291 static void mtdoops_notify_add(struct mtd_info *mtd)  in mtdoops_notify_add()  argument
294 	u64 mtdoops_pages = div_u64(mtd->size, record_size);  in mtdoops_notify_add()
297 	if (!strcmp(mtd->name, mtddev))  in mtdoops_notify_add()
298 		cxt->mtd_index = mtd->index;  in mtdoops_notify_add()
300 	if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)  in mtdoops_notify_add()
303 	if (mtd->size < mtd->erasesize * 2) {  in mtdoops_notify_add()
304 		printk(KERN_ERR "mtdoops: MTD partition %d not big enough for mtdoops\n",  in mtdoops_notify_add()
305 		       mtd->index);  in mtdoops_notify_add()
308 	if (mtd->erasesize < record_size) {  in mtdoops_notify_add()
309 		printk(KERN_ERR "mtdoops: eraseblock size of MTD partition %d too small\n",  in mtdoops_notify_add()
310 		       mtd->index);  in mtdoops_notify_add()
313 	if (mtd->size > MTDOOPS_MAX_MTD_SIZE) {  in mtdoops_notify_add()
314 		printk(KERN_ERR "mtdoops: mtd%d is too large (limit is %d MiB)\n",  in mtdoops_notify_add()
315 		       mtd->index, MTDOOPS_MAX_MTD_SIZE / 1024 / 1024);  in mtdoops_notify_add()
339 	cxt->mtd = mtd;  in mtdoops_notify_add()
340 	cxt->oops_pages = (int)mtd->size / record_size;  in mtdoops_notify_add()
342 	printk(KERN_INFO "mtdoops: Attached to MTD device %d\n", mtd->index);  in mtdoops_notify_add()
345 static void mtdoops_notify_remove(struct mtd_info *mtd)  in mtdoops_notify_remove()  argument
349 	if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)  in mtdoops_notify_remove()
355 	cxt->mtd = NULL;  in mtdoops_notify_remove()
373 		printk(KERN_ERR "mtdoops: mtd device (mtddev=name/number) must be supplied\n");  in mtdoops_init()
385 	/* Setup the MTD device to use */  in mtdoops_init()
420 MODULE_DESCRIPTION("MTD Oops/Panic console logger/driver");