drivers/mtd/mtdpstore.c

8 #include <linux/mtd/mtd.h>
16 	struct mtd_info *mtd;
30 	struct mtd_info *mtd = cxt->mtd;
33 	off = ALIGN_DOWN(off, mtd->erasesize);
34 	blknum = div_u64(off, mtd->erasesize);
38 	ret = mtd_block_isbad(mtd, off);
40 		dev_err(&mtd->dev, "mtd_block_isbad failed, aborting\n");
52 	struct mtd_info *mtd = cxt->mtd;
55 	off = ALIGN_DOWN(off, mtd->erasesize);
56 	blknum = div_u64(off, mtd->erasesize);
63 	struct mtd_info *mtd = cxt->mtd;
66 	dev_dbg(&mtd->dev, "mark zone %llu used\n", zonenum);
73 	struct mtd_info *mtd = cxt->mtd;
76 	dev_dbg(&mtd->dev, "mark zone %llu unused\n", zonenum);
83 	struct mtd_info *mtd = cxt->mtd;
84 	u32 zonecnt = mtd->erasesize / cxt->info.kmsg_size;
87 	off = ALIGN_DOWN(off, mtd->erasesize);
90 		dev_dbg(&mtd->dev, "mark zone %llu unused\n", zonenum);
100 	u64 blknum = div_u64(off, cxt->mtd->erasesize);
110 	struct mtd_info *mtd = cxt->mtd;
111 	u32 zonecnt = mtd->erasesize / cxt->info.kmsg_size;
114 	off = ALIGN_DOWN(off, mtd->erasesize);
128 	struct mtd_info *mtd = cxt->mtd;
132 	sz = min_t(uint32_t, size, mtd->writesize / 4);
142 	struct mtd_info *mtd = cxt->mtd;
145 	dev_dbg(&mtd->dev, "mark zone %llu removed\n", zonenum);
152 	struct mtd_info *mtd = cxt->mtd;
153 	u32 zonecnt = mtd->erasesize / cxt->info.kmsg_size;
156 	off = ALIGN_DOWN(off, mtd->erasesize);
168 	struct mtd_info *mtd = cxt->mtd;
169 	u32 zonecnt = mtd->erasesize / cxt->info.kmsg_size;
172 	off = ALIGN_DOWN(off, mtd->erasesize);
185 	struct mtd_info *mtd = cxt->mtd;
189 	off = ALIGN_DOWN(off, cxt->mtd->erasesize);
190 	dev_dbg(&mtd->dev, "try to erase off 0x%llx\n", off);
191 	erase.len = cxt->mtd->erasesize;
193 	ret = mtd_erase(cxt->mtd, &erase);
197 		dev_err(&mtd->dev, "erase of region [0x%llx, 0x%llx] on \"%s\" failed\n",
240 	struct mtd_info *mtd = cxt->mtd;
242 	u32 zonecnt = (u32)div_u64(cxt->mtd->size, cxt->info.kmsg_size);
243 	u32 blkcnt = (u32)div_u64(cxt->mtd->size, cxt->mtd->erasesize);
244 	u32 erasesize = cxt->mtd->erasesize;
256 		div64_u64_rem(off + erasesize, cxt->mtd->size, (u64 *)&off);
269 		dev_err(&mtd->dev, "all blocks bad!\n");
270 	dev_dbg(&mtd->dev, "end security\n");
277 	struct mtd_info *mtd = cxt->mtd;
288 	dev_dbg(&mtd->dev, "try to write off 0x%llx size %zu\n", off, size);
289 	ret = mtd_write(cxt->mtd, off, size, &retlen, (u_char *)buf);
291 		dev_err(&mtd->dev, "write failure at %lld (%zu of %zu written), err %d\n",
313 	struct mtd_info *mtd = cxt->mtd;
320 	dev_dbg(&mtd->dev, "try to read off 0x%llx size %zu\n", off, size);
324 		ret = mtd_read(cxt->mtd, off + done, size - done, &retlen,
327 			dev_err(&mtd->dev, "read failure at %lld (%zu of %zu read), err %d\n",
340 			dev_err(&mtd->dev, "ecc error at %lld (%zu of %zu read), err %d\n",
359 	struct mtd_info *mtd = cxt->mtd;
370 	ret = mtd_panic_write(cxt->mtd, off, size, &retlen, (u_char *)buf);
372 		dev_err(&mtd->dev, "panic write failure at %lld (%zu of %zu read), err %d\n",
381 static void mtdpstore_notify_add(struct mtd_info *mtd)
388 	if (!strcmp(mtd->name, info->device))
389 		cxt->index = mtd->index;
391 	if (mtd->index != cxt->index || cxt->index < 0)
394 	dev_dbg(&mtd->dev, "found matching MTD device %s\n", mtd->name);
396 	if (mtd->size < info->kmsg_size * 2) {
397 		dev_err(&mtd->dev, "MTD partition %d not big enough\n",
398 				mtd->index);
407 	if (mtd->erasesize < info->kmsg_size) {
408 		dev_err(&mtd->dev, "eraseblock size of MTD partition %d too small\n",
409 				mtd->index);
412 	if (unlikely(info->kmsg_size % mtd->writesize)) {
413 		dev_err(&mtd->dev, "record size %lu KB must align to write size %d KB\n",
415 				mtd->writesize / 1024);
419 	longcnt = BITS_TO_LONGS(div_u64(mtd->size, info->kmsg_size));
420 	cxt->rmmap = devm_kcalloc(&mtd->dev, longcnt, sizeof(long), GFP_KERNEL);
421 	cxt->usedmap = devm_kcalloc(&mtd->dev, longcnt, sizeof(long), GFP_KERNEL);
423 	longcnt = BITS_TO_LONGS(div_u64(mtd->size, mtd->erasesize));
424 	cxt->badmap = devm_kcalloc(&mtd->dev, longcnt, sizeof(long), GFP_KERNEL);
435 	cxt->dev.zone.total_size = mtd->size;
439 		dev_err(&mtd->dev, "mtd%d register to psblk failed\n",
440 				mtd->index);
443 	cxt->mtd = mtd;
444 	dev_info(&mtd->dev, "Attached to MTD device %d\n", mtd->index);
450 	struct mtd_info *mtd = cxt->mtd;
456 	buf = kmalloc(mtd->erasesize, GFP_KERNEL);
461 	ret = mtd_read(mtd, off, mtd->erasesize, &retlen, buf);
466 	erase.len = mtd->erasesize;
468 	ret = mtd_erase(mtd, &erase);
478 			ret = mtd_write(mtd, off, zonesize, &retlen, buf);
480 				dev_err(&mtd->dev, "write failure at %lld (%zu of %u written), err %d\n",
502 	struct mtd_info *mtd = cxt->mtd;
505 	u32 blkcnt = (u32)div_u64(mtd->size, mtd->erasesize);
507 	for (off = 0; blkcnt > 0; blkcnt--, off += mtd->erasesize) {
516 		ret = mtdpstore_flush_removed_do(cxt, off, mtd->erasesize);
523 static void mtdpstore_notify_remove(struct mtd_info *mtd)
527 	if (mtd->index != cxt->index || cxt->index < 0)
533 	cxt->mtd = NULL;
553 		pr_err("mtd device must be supplied (device name is empty)\n");
561 	/* Setup the MTD device to use */
579 MODULE_DESCRIPTION("MTD backend for pstore/blk");