8 #include <linux/mtd/mtd.h>
16 	struct mtd_info *mtd;  member
30 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_block_isbad()  local
33 	off = ALIGN_DOWN(off, mtd->erasesize);  in mtdpstore_block_isbad()
34 	blknum = div_u64(off, mtd->erasesize);  in mtdpstore_block_isbad()
38 	ret = mtd_block_isbad(mtd, off);  in mtdpstore_block_isbad()
40 		dev_err(&mtd->dev, "mtd_block_isbad failed, aborting\n");  in mtdpstore_block_isbad()
52 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_panic_block_isbad()  local
55 	off = ALIGN_DOWN(off, mtd->erasesize);  in mtdpstore_panic_block_isbad()
56 	blknum = div_u64(off, mtd->erasesize);  in mtdpstore_panic_block_isbad()
63 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_mark_used()  local
66 	dev_dbg(&mtd->dev, "mark zone %llu used\n", zonenum);  in mtdpstore_mark_used()
73 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_mark_unused()  local
76 	dev_dbg(&mtd->dev, "mark zone %llu unused\n", zonenum);  in mtdpstore_mark_unused()
83 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_block_mark_unused()  local
84 	u32 zonecnt = mtd->erasesize / cxt->info.kmsg_size;  in mtdpstore_block_mark_unused()
87 	off = ALIGN_DOWN(off, mtd->erasesize);  in mtdpstore_block_mark_unused()
90 		dev_dbg(&mtd->dev, "mark zone %llu unused\n", zonenum);  in mtdpstore_block_mark_unused()
100 	u64 blknum = div_u64(off, cxt->mtd->erasesize);  in mtdpstore_is_used()
110 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_block_is_used()  local
111 	u32 zonecnt = mtd->erasesize / cxt->info.kmsg_size;  in mtdpstore_block_is_used()
114 	off = ALIGN_DOWN(off, mtd->erasesize);  in mtdpstore_block_is_used()
128 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_is_empty()  local
132 	sz = min_t(uint32_t, size, mtd->writesize / 4);  in mtdpstore_is_empty()
142 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_mark_removed()  local
145 	dev_dbg(&mtd->dev, "mark zone %llu removed\n", zonenum);  in mtdpstore_mark_removed()
152 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_block_clear_removed()  local
153 	u32 zonecnt = mtd->erasesize / cxt->info.kmsg_size;  in mtdpstore_block_clear_removed()
156 	off = ALIGN_DOWN(off, mtd->erasesize);  in mtdpstore_block_clear_removed()
168 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_block_is_removed()  local
169 	u32 zonecnt = mtd->erasesize / cxt->info.kmsg_size;  in mtdpstore_block_is_removed()
172 	off = ALIGN_DOWN(off, mtd->erasesize);  in mtdpstore_block_is_removed()
185 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_erase_do()  local
189 	off = ALIGN_DOWN(off, cxt->mtd->erasesize);  in mtdpstore_erase_do()
190 	dev_dbg(&mtd->dev, "try to erase off 0x%llx\n", off);  in mtdpstore_erase_do()
191 	erase.len = cxt->mtd->erasesize;  in mtdpstore_erase_do()
193 	ret = mtd_erase(cxt->mtd, &erase);  in mtdpstore_erase_do()
197 		dev_err(&mtd->dev, "erase of region [0x%llx, 0x%llx] on \"%s\" failed\n",  in mtdpstore_erase_do()
240 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_security()  local
242 	u32 zonecnt = (u32)div_u64(cxt->mtd->size, cxt->info.kmsg_size);  in mtdpstore_security()
243 	u32 blkcnt = (u32)div_u64(cxt->mtd->size, cxt->mtd->erasesize);  in mtdpstore_security()
244 	u32 erasesize = cxt->mtd->erasesize;  in mtdpstore_security()
256 		div64_u64_rem(off + erasesize, cxt->mtd->size, (u64 *)&off);  in mtdpstore_security()
269 		dev_err(&mtd->dev, "all blocks bad!\n");  in mtdpstore_security()
270 	dev_dbg(&mtd->dev, "end security\n");  in mtdpstore_security()
277 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_write()  local
288 	dev_dbg(&mtd->dev, "try to write off 0x%llx size %zu\n", off, size);  in mtdpstore_write()
289 	ret = mtd_write(cxt->mtd, off, size, &retlen, (u_char *)buf);  in mtdpstore_write()
291 		dev_err(&mtd->dev, "write failure at %lld (%zu of %zu written), err %d\n",  in mtdpstore_write()
313 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_read()  local
320 	dev_dbg(&mtd->dev, "try to read off 0x%llx size %zu\n", off, size);  in mtdpstore_read()
324 		ret = mtd_read(cxt->mtd, off + done, size - done, &retlen,  in mtdpstore_read()
327 			dev_err(&mtd->dev, "read failure at %lld (%zu of %zu read), err %d\n",  in mtdpstore_read()
340 			dev_err(&mtd->dev, "ecc error at %lld (%zu of %zu read), err %d\n",  in mtdpstore_read()
359 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_panic_write()  local
370 	ret = mtd_panic_write(cxt->mtd, off, size, &retlen, (u_char *)buf);  in mtdpstore_panic_write()
372 		dev_err(&mtd->dev, "panic write failure at %lld (%zu of %zu read), err %d\n",  in mtdpstore_panic_write()
381 static void mtdpstore_notify_add(struct mtd_info *mtd)  in mtdpstore_notify_add()  argument
388 	if (!strcmp(mtd->name, info->device))  in mtdpstore_notify_add()
389 		cxt->index = mtd->index;  in mtdpstore_notify_add()
391 	if (mtd->index != cxt->index || cxt->index < 0)  in mtdpstore_notify_add()
394 	dev_dbg(&mtd->dev, "found matching MTD device %s\n", mtd->name);  in mtdpstore_notify_add()
396 	if (mtd->size < info->kmsg_size * 2) {  in mtdpstore_notify_add()
397 		dev_err(&mtd->dev, "MTD partition %d not big enough\n",  in mtdpstore_notify_add()
398 				mtd->index);  in mtdpstore_notify_add()
407 	if (mtd->erasesize < info->kmsg_size) {  in mtdpstore_notify_add()
408 		dev_err(&mtd->dev, "eraseblock size of MTD partition %d too small\n",  in mtdpstore_notify_add()
409 				mtd->index);  in mtdpstore_notify_add()
412 	if (unlikely(info->kmsg_size % mtd->writesize)) {  in mtdpstore_notify_add()
413 		dev_err(&mtd->dev, "record size %lu KB must align to write size %d KB\n",  in mtdpstore_notify_add()
415 				mtd->writesize / 1024);  in mtdpstore_notify_add()
419 	longcnt = BITS_TO_LONGS(div_u64(mtd->size, info->kmsg_size));  in mtdpstore_notify_add()
423 	longcnt = BITS_TO_LONGS(div_u64(mtd->size, mtd->erasesize));  in mtdpstore_notify_add()
426 	cxt->dev.total_size = mtd->size;  in mtdpstore_notify_add()
436 		dev_err(&mtd->dev, "mtd%d register to psblk failed\n",  in mtdpstore_notify_add()
437 				mtd->index);  in mtdpstore_notify_add()
440 	cxt->mtd = mtd;  in mtdpstore_notify_add()
441 	dev_info(&mtd->dev, "Attached to MTD device %d\n", mtd->index);  in mtdpstore_notify_add()
447 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_flush_removed_do()  local
453 	buf = kmalloc(mtd->erasesize, GFP_KERNEL);  in mtdpstore_flush_removed_do()
458 	ret = mtd_read(mtd, off, mtd->erasesize, &retlen, buf);  in mtdpstore_flush_removed_do()
463 	erase.len = mtd->erasesize;  in mtdpstore_flush_removed_do()
465 	ret = mtd_erase(mtd, &erase);  in mtdpstore_flush_removed_do()
475 			ret = mtd_write(mtd, off, zonesize, &retlen, buf);  in mtdpstore_flush_removed_do()
477 				dev_err(&mtd->dev, "write failure at %lld (%zu of %u written), err %d\n",  in mtdpstore_flush_removed_do()
499 	struct mtd_info *mtd = cxt->mtd;  in mtdpstore_flush_removed()  local
502 	u32 blkcnt = (u32)div_u64(mtd->size, mtd->erasesize);  in mtdpstore_flush_removed()
504 	for (off = 0; blkcnt > 0; blkcnt--, off += mtd->erasesize) {  in mtdpstore_flush_removed()
513 		ret = mtdpstore_flush_removed_do(cxt, off, mtd->erasesize);  in mtdpstore_flush_removed()
520 static void mtdpstore_notify_remove(struct mtd_info *mtd)  in mtdpstore_notify_remove()  argument
524 	if (mtd->index != cxt->index || cxt->index < 0)  in mtdpstore_notify_remove()
533 	cxt->mtd = NULL;  in mtdpstore_notify_remove()
553 		pr_err("mtd device must be supplied (device name is empty)\n");  in mtdpstore_init()
561 	/* Setup the MTD device to use */  in mtdpstore_init()
579 MODULE_DESCRIPTION("MTD backend for pstore/blk");