#include <linux/mtd/mtd.h>
#include <linux/mtd/concat.h>
+#include <asm/div64.h>
+
/*
* Our storage structure:
* Subdev points to an array of pointers to struct mtd_info objects
size_t * retlen, u_char * buf)
{
struct mtd_concat *concat = CONCAT(mtd);
- int err = -EINVAL;
+ int ret = 0, err;
int i;
*retlen = 0;
err = subdev->read(subdev, from, size, &retsize, buf);
- if (err)
- break;
+ /* Save information about bitflips! */
+ if (unlikely(err)) {
+ if (err == -EBADMSG) {
+ mtd->ecc_stats.failed++;
+ ret = err;
+ } else if (err == -EUCLEAN) {
+ mtd->ecc_stats.corrected++;
+ /* Do not overwrite -EBADMSG !! */
+ if (!ret)
+ ret = err;
+ } else
+ return err;
+ }
*retlen += retsize;
len -= size;
if (len == 0)
- break;
+ return ret;
- err = -EINVAL;
buf += size;
from = 0;
}
- return err;
+ return -EINVAL;
}
static int
}
static int
-concat_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
- size_t * retlen, u_char * buf, u_char * eccbuf,
- struct nand_oobinfo *oobsel)
-{
- struct mtd_concat *concat = CONCAT(mtd);
- int err = -EINVAL;
- int i;
-
- *retlen = 0;
-
- for (i = 0; i < concat->num_subdev; i++) {
- struct mtd_info *subdev = concat->subdev[i];
- size_t size, retsize;
-
- if (from >= subdev->size) {
- /* Not destined for this subdev */
- size = 0;
- from -= subdev->size;
- continue;
- }
-
- if (from + len > subdev->size)
- /* First part goes into this subdev */
- size = subdev->size - from;
- else
- /* Entire transaction goes into this subdev */
- size = len;
-
- if (subdev->read_ecc)
- err = subdev->read_ecc(subdev, from, size,
- &retsize, buf, eccbuf, oobsel);
- else
- err = -EINVAL;
-
- if (err)
- break;
-
- *retlen += retsize;
- len -= size;
- if (len == 0)
- break;
-
- err = -EINVAL;
- buf += size;
- if (eccbuf) {
- eccbuf += subdev->oobsize;
- /* in nand.c at least, eccbufs are
- tagged with 2 (int)eccstatus'; we
- must account for these */
- eccbuf += 2 * (sizeof (int));
- }
- from = 0;
- }
- return err;
-}
-
-static int
-concat_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
- size_t * retlen, const u_char * buf, u_char * eccbuf,
- struct nand_oobinfo *oobsel)
-{
- struct mtd_concat *concat = CONCAT(mtd);
- int err = -EINVAL;
- int i;
-
- if (!(mtd->flags & MTD_WRITEABLE))
- return -EROFS;
-
- *retlen = 0;
-
- for (i = 0; i < concat->num_subdev; i++) {
- struct mtd_info *subdev = concat->subdev[i];
- size_t size, retsize;
-
- if (to >= subdev->size) {
- size = 0;
- to -= subdev->size;
- continue;
- }
- if (to + len > subdev->size)
- size = subdev->size - to;
- else
- size = len;
-
- if (!(subdev->flags & MTD_WRITEABLE))
- err = -EROFS;
- else if (subdev->write_ecc)
- err = subdev->write_ecc(subdev, to, size,
- &retsize, buf, eccbuf, oobsel);
- else
- err = -EINVAL;
-
- if (err)
- break;
-
- *retlen += retsize;
- len -= size;
- if (len == 0)
- break;
-
- err = -EINVAL;
- buf += size;
- if (eccbuf)
- eccbuf += subdev->oobsize;
- to = 0;
- }
- return err;
-}
-
-static int
-concat_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t * retlen,
- u_char *eccbuf, struct nand_oobinfo *oobsel)
+concat_writev(struct mtd_info *mtd, const struct kvec *vecs,
+ unsigned long count, loff_t to, size_t * retlen)
{
struct mtd_concat *concat = CONCAT(mtd);
struct kvec *vecs_copy;
return -EINVAL;
/* Check alignment */
- if (mtd->writesize > 1)
- if ((to % mtd->writesize) || (total_len % mtd->writesize))
+ if (mtd->writesize > 1) {
+ loff_t __to = to;
+ if (do_div(__to, mtd->writesize) || (total_len % mtd->writesize))
return -EINVAL;
+ }
/* make a copy of vecs */
vecs_copy = kmalloc(sizeof(struct kvec) * count, GFP_KERNEL);
if (!(subdev->flags & MTD_WRITEABLE))
err = -EROFS;
- else if (eccbuf)
- err = subdev->writev_ecc(subdev, &vecs_copy[entry_low],
- entry_high - entry_low + 1, to, &retsize,
- eccbuf, oobsel);
else
err = subdev->writev(subdev, &vecs_copy[entry_low],
entry_high - entry_low + 1, to, &retsize);
*retlen += retsize;
total_len -= wsize;
- if (concat->mtd.type == MTD_NANDFLASH && eccbuf)
- eccbuf += mtd->oobavail * (wsize / mtd->oobblock);
if (total_len == 0)
break;
}
static int
-concat_writev(struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t * retlen)
-{
- return concat_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL);
-}
-
-static int
-concat_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
- size_t * retlen, u_char * buf)
+concat_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops)
{
struct mtd_concat *concat = CONCAT(mtd);
- int err = -EINVAL;
- int i;
+ struct mtd_oob_ops devops = *ops;
+ int i, err, ret = 0;
- *retlen = 0;
+ ops->retlen = ops->oobretlen = 0;
for (i = 0; i < concat->num_subdev; i++) {
struct mtd_info *subdev = concat->subdev[i];
- size_t size, retsize;
if (from >= subdev->size) {
- /* Not destined for this subdev */
- size = 0;
from -= subdev->size;
continue;
}
- if (from + len > subdev->size)
- /* First part goes into this subdev */
- size = subdev->size - from;
- else
- /* Entire transaction goes into this subdev */
- size = len;
- if (subdev->read_oob)
- err = subdev->read_oob(subdev, from, size,
- &retsize, buf);
- else
- err = -EINVAL;
-
- if (err)
- break;
+ /* partial read ? */
+ if (from + devops.len > subdev->size)
+ devops.len = subdev->size - from;
+
+ err = subdev->read_oob(subdev, from, &devops);
+ ops->retlen += devops.retlen;
+ ops->oobretlen += devops.oobretlen;
+
+ /* Save information about bitflips! */
+ if (unlikely(err)) {
+ if (err == -EBADMSG) {
+ mtd->ecc_stats.failed++;
+ ret = err;
+ } else if (err == -EUCLEAN) {
+ mtd->ecc_stats.corrected++;
+ /* Do not overwrite -EBADMSG !! */
+ if (!ret)
+ ret = err;
+ } else
+ return err;
+ }
- *retlen += retsize;
- len -= size;
- if (len == 0)
- break;
+ if (devops.datbuf) {
+ devops.len = ops->len - ops->retlen;
+ if (!devops.len)
+ return ret;
+ devops.datbuf += devops.retlen;
+ }
+ if (devops.oobbuf) {
+ devops.ooblen = ops->ooblen - ops->oobretlen;
+ if (!devops.ooblen)
+ return ret;
+ devops.oobbuf += ops->oobretlen;
+ }
- err = -EINVAL;
- buf += size;
from = 0;
}
- return err;
+ return -EINVAL;
}
static int
-concat_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
- size_t * retlen, const u_char * buf)
+concat_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops)
{
struct mtd_concat *concat = CONCAT(mtd);
- int err = -EINVAL;
- int i;
+ struct mtd_oob_ops devops = *ops;
+ int i, err;
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
- *retlen = 0;
+ ops->retlen = 0;
for (i = 0; i < concat->num_subdev; i++) {
struct mtd_info *subdev = concat->subdev[i];
- size_t size, retsize;
if (to >= subdev->size) {
- size = 0;
to -= subdev->size;
continue;
}
- if (to + len > subdev->size)
- size = subdev->size - to;
- else
- size = len;
- if (!(subdev->flags & MTD_WRITEABLE))
- err = -EROFS;
- else if (subdev->write_oob)
- err = subdev->write_oob(subdev, to, size, &retsize,
- buf);
- else
- err = -EINVAL;
+ /* partial write ? */
+ if (to + devops.len > subdev->size)
+ devops.len = subdev->size - to;
+ err = subdev->write_oob(subdev, to, &devops);
+ ops->retlen += devops.retlen;
if (err)
- break;
+ return err;
- *retlen += retsize;
- len -= size;
- if (len == 0)
- break;
-
- err = -EINVAL;
- buf += size;
+ if (devops.datbuf) {
+ devops.len = ops->len - ops->retlen;
+ if (!devops.len)
+ return 0;
+ devops.datbuf += devops.retlen;
+ }
+ if (devops.oobbuf) {
+ devops.ooblen = ops->ooblen - ops->oobretlen;
+ if (!devops.ooblen)
+ return 0;
+ devops.oobbuf += devops.oobretlen;
+ }
to = 0;
}
- return err;
+ return -EINVAL;
}
static void concat_erase_callback(struct erase_info *instr)
}
err = subdev->block_markbad(subdev, ofs);
+ if (!err)
+ mtd->ecc_stats.badblocks++;
break;
}
/* allocate the device structure */
size = SIZEOF_STRUCT_MTD_CONCAT(num_devs);
- concat = kmalloc(size, GFP_KERNEL);
+ concat = kzalloc(size, GFP_KERNEL);
if (!concat) {
printk
("memory allocation error while creating concatenated device \"%s\"\n",
name);
return NULL;
}
- memset(concat, 0, size);
concat->subdev = (struct mtd_info **) (concat + 1);
/*
concat->mtd.flags = subdev[0]->flags;
concat->mtd.size = subdev[0]->size;
concat->mtd.erasesize = subdev[0]->erasesize;
- concat->mtd.oobblock = subdev[0]->oobblock;
+ concat->mtd.writesize = subdev[0]->writesize;
concat->mtd.oobsize = subdev[0]->oobsize;
- concat->mtd.ecctype = subdev[0]->ecctype;
- concat->mtd.eccsize = subdev[0]->eccsize;
- if (subdev[0]->read_ecc)
- concat->mtd.read_ecc = concat_read_ecc;
- if (subdev[0]->write_ecc)
- concat->mtd.write_ecc = concat_write_ecc;
if (subdev[0]->writev)
concat->mtd.writev = concat_writev;
- if (subdev[0]->writev_ecc)
- concat->mtd.writev_ecc = concat_writev_ecc;
if (subdev[0]->read_oob)
concat->mtd.read_oob = concat_read_oob;
if (subdev[0]->write_oob)
if (subdev[0]->block_markbad)
concat->mtd.block_markbad = concat_block_markbad;
+ concat->mtd.ecc_stats.badblocks = subdev[0]->ecc_stats.badblocks;
+
concat->subdev[0] = subdev[0];
for (i = 1; i < num_devs; i++) {
subdev[i]->flags & MTD_WRITEABLE;
}
concat->mtd.size += subdev[i]->size;
- if (concat->mtd.oobblock != subdev[i]->oobblock ||
+ concat->mtd.ecc_stats.badblocks +=
+ subdev[i]->ecc_stats.badblocks;
+ if (concat->mtd.writesize != subdev[i]->writesize ||
+ concat->mtd.subpage_sft != subdev[i]->subpage_sft ||
concat->mtd.oobsize != subdev[i]->oobsize ||
- concat->mtd.ecctype != subdev[i]->ecctype ||
- concat->mtd.eccsize != subdev[i]->eccsize ||
- !concat->mtd.read_ecc != !subdev[i]->read_ecc ||
- !concat->mtd.write_ecc != !subdev[i]->write_ecc ||
!concat->mtd.read_oob != !subdev[i]->read_oob ||
!concat->mtd.write_oob != !subdev[i]->write_oob) {
kfree(concat);
}
- if(concat->mtd.type == MTD_NANDFLASH)
- memcpy(&concat->mtd.oobinfo, &subdev[0]->oobinfo,
- sizeof(struct nand_oobinfo));
+ concat->mtd.ecclayout = subdev[0]->ecclayout;
concat->num_subdev = num_devs;
concat->mtd.name = name;
git.openpandora.org / pandora-kernel.git / blobdiff