/*
* Simple MTD partitioning layer
*
- * (C) 2000 Nicolas Pitre <nico@cam.org>
+ * (C) 2000 Nicolas Pitre <nico@fluxnic.net>
*
* This code is GPL
*
struct mtd_part {
struct mtd_info mtd;
struct mtd_info *master;
- u_int32_t offset;
- int index;
+ uint64_t offset;
struct list_head list;
- int registered;
};
/*
* to the _real_ device.
*/
-static int part_read (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+static int part_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
{
struct mtd_part *part = PART(mtd);
+ struct mtd_ecc_stats stats;
int res;
+ stats = part->master->ecc_stats;
+
if (from >= mtd->size)
len = 0;
else if (from + len > mtd->size)
len = mtd->size - from;
- res = part->master->read (part->master, from + part->offset,
+ res = part->master->read(part->master, from + part->offset,
len, retlen, buf);
if (unlikely(res)) {
if (res == -EUCLEAN)
- mtd->ecc_stats.corrected++;
+ mtd->ecc_stats.corrected += part->master->ecc_stats.corrected - stats.corrected;
if (res == -EBADMSG)
- mtd->ecc_stats.failed++;
+ mtd->ecc_stats.failed += part->master->ecc_stats.failed - stats.failed;
}
return res;
}
-static int part_point (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, void **virt, resource_size_t *phys)
+static int part_point(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, void **virt, resource_size_t *phys)
{
struct mtd_part *part = PART(mtd);
if (from >= mtd->size)
part->master->unpoint(part->master, from + part->offset, len);
}
+static unsigned long part_get_unmapped_area(struct mtd_info *mtd,
+ unsigned long len,
+ unsigned long offset,
+ unsigned long flags)
+{
+ struct mtd_part *part = PART(mtd);
+
+ offset += part->offset;
+ return part->master->get_unmapped_area(part->master, len, offset,
+ flags);
+}
+
static int part_read_oob(struct mtd_info *mtd, loff_t from,
- struct mtd_oob_ops *ops)
+ struct mtd_oob_ops *ops)
{
struct mtd_part *part = PART(mtd);
int res;
return res;
}
-static int part_read_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len, size_t *retlen, u_char *buf)
{
struct mtd_part *part = PART(mtd);
- return part->master->read_user_prot_reg (part->master, from,
+ return part->master->read_user_prot_reg(part->master, from,
len, retlen, buf);
}
-static int part_get_user_prot_info (struct mtd_info *mtd,
- struct otp_info *buf, size_t len)
+static int part_get_user_prot_info(struct mtd_info *mtd,
+ struct otp_info *buf, size_t len)
{
struct mtd_part *part = PART(mtd);
- return part->master->get_user_prot_info (part->master, buf, len);
+ return part->master->get_user_prot_info(part->master, buf, len);
}
-static int part_read_fact_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len, size_t *retlen, u_char *buf)
{
struct mtd_part *part = PART(mtd);
- return part->master->read_fact_prot_reg (part->master, from,
+ return part->master->read_fact_prot_reg(part->master, from,
len, retlen, buf);
}
-static int part_get_fact_prot_info (struct mtd_info *mtd,
- struct otp_info *buf, size_t len)
+static int part_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
+ size_t len)
{
struct mtd_part *part = PART(mtd);
- return part->master->get_fact_prot_info (part->master, buf, len);
+ return part->master->get_fact_prot_info(part->master, buf, len);
}
-static int part_write (struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
+static int part_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
{
struct mtd_part *part = PART(mtd);
if (!(mtd->flags & MTD_WRITEABLE))
len = 0;
else if (to + len > mtd->size)
len = mtd->size - to;
- return part->master->write (part->master, to + part->offset,
+ return part->master->write(part->master, to + part->offset,
len, retlen, buf);
}
-static int part_panic_write (struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
+static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
{
struct mtd_part *part = PART(mtd);
if (!(mtd->flags & MTD_WRITEABLE))
len = 0;
else if (to + len > mtd->size)
len = mtd->size - to;
- return part->master->panic_write (part->master, to + part->offset,
+ return part->master->panic_write(part->master, to + part->offset,
len, retlen, buf);
}
static int part_write_oob(struct mtd_info *mtd, loff_t to,
- struct mtd_oob_ops *ops)
+ struct mtd_oob_ops *ops)
{
struct mtd_part *part = PART(mtd);
return part->master->write_oob(part->master, to + part->offset, ops);
}
-static int part_write_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len, size_t *retlen, u_char *buf)
{
struct mtd_part *part = PART(mtd);
- return part->master->write_user_prot_reg (part->master, from,
+ return part->master->write_user_prot_reg(part->master, from,
len, retlen, buf);
}
-static int part_lock_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len)
+static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len)
{
struct mtd_part *part = PART(mtd);
- return part->master->lock_user_prot_reg (part->master, from, len);
+ return part->master->lock_user_prot_reg(part->master, from, len);
}
-static int part_writev (struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t *retlen)
+static int part_writev(struct mtd_info *mtd, const struct kvec *vecs,
+ unsigned long count, loff_t to, size_t *retlen)
{
struct mtd_part *part = PART(mtd);
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
- return part->master->writev (part->master, vecs, count,
+ return part->master->writev(part->master, vecs, count,
to + part->offset, retlen);
}
-static int part_erase (struct mtd_info *mtd, struct erase_info *instr)
+static int part_erase(struct mtd_info *mtd, struct erase_info *instr)
{
struct mtd_part *part = PART(mtd);
int ret;
instr->addr += part->offset;
ret = part->master->erase(part->master, instr);
if (ret) {
- if (instr->fail_addr != 0xffffffff)
+ if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
instr->fail_addr -= part->offset;
instr->addr -= part->offset;
}
if (instr->mtd->erase == part_erase) {
struct mtd_part *part = PART(instr->mtd);
- if (instr->fail_addr != 0xffffffff)
+ if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
instr->fail_addr -= part->offset;
instr->addr -= part->offset;
}
}
EXPORT_SYMBOL_GPL(mtd_erase_callback);
-static int part_lock (struct mtd_info *mtd, loff_t ofs, size_t len)
+static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = PART(mtd);
if ((len + ofs) > mtd->size)
return part->master->lock(part->master, ofs + part->offset, len);
}
-static int part_unlock (struct mtd_info *mtd, loff_t ofs, size_t len)
+static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = PART(mtd);
if ((len + ofs) > mtd->size)
part->master->resume(part->master);
}
-static int part_block_isbad (struct mtd_info *mtd, loff_t ofs)
+static int part_block_isbad(struct mtd_info *mtd, loff_t ofs)
{
struct mtd_part *part = PART(mtd);
if (ofs >= mtd->size)
return part->master->block_isbad(part->master, ofs);
}
-static int part_block_markbad (struct mtd_info *mtd, loff_t ofs)
+static int part_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
struct mtd_part *part = PART(mtd);
int res;
list_for_each_entry_safe(slave, next, &mtd_partitions, list)
if (slave->master == master) {
list_del(&slave->list);
- if(slave->registered)
- del_mtd_device(&slave->mtd);
+ del_mtd_device(&slave->mtd);
kfree(slave);
}
return 0;
}
+EXPORT_SYMBOL(del_mtd_partitions);
static struct mtd_part *add_one_partition(struct mtd_info *master,
const struct mtd_partition *part, int partno,
- u_int32_t cur_offset)
+ uint64_t cur_offset)
{
struct mtd_part *slave;
/* allocate the partition structure */
- slave = kzalloc (sizeof(*slave), GFP_KERNEL);
+ slave = kzalloc(sizeof(*slave), GFP_KERNEL);
if (!slave) {
- printk("memory allocation error while creating partitions for \"%s\"\n",
+ printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n",
master->name);
del_mtd_partitions(master);
return NULL;
slave->mtd.name = part->name;
slave->mtd.owner = master->owner;
+ slave->mtd.backing_dev_info = master->backing_dev_info;
+
+ /* NOTE: we don't arrange MTDs as a tree; it'd be error-prone
+ * to have the same data be in two different partitions.
+ */
+ slave->mtd.dev.parent = master->dev.parent;
slave->mtd.read = part_read;
slave->mtd.write = part_write;
if (master->panic_write)
slave->mtd.panic_write = part_panic_write;
- if(master->point && master->unpoint){
+ if (master->point && master->unpoint) {
slave->mtd.point = part_point;
slave->mtd.unpoint = part_unpoint;
}
+ if (master->get_unmapped_area)
+ slave->mtd.get_unmapped_area = part_get_unmapped_area;
if (master->read_oob)
slave->mtd.read_oob = part_read_oob;
if (master->write_oob)
slave->mtd.write_oob = part_write_oob;
- if(master->read_user_prot_reg)
+ if (master->read_user_prot_reg)
slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
- if(master->read_fact_prot_reg)
+ if (master->read_fact_prot_reg)
slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
- if(master->write_user_prot_reg)
+ if (master->write_user_prot_reg)
slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
- if(master->lock_user_prot_reg)
+ if (master->lock_user_prot_reg)
slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
- if(master->get_user_prot_info)
+ if (master->get_user_prot_info)
slave->mtd.get_user_prot_info = part_get_user_prot_info;
- if(master->get_fact_prot_info)
+ if (master->get_fact_prot_info)
slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
if (master->sync)
slave->mtd.sync = part_sync;
- if (!partno && master->suspend && master->resume) {
+ if (!partno && !master->dev.class && master->suspend && master->resume) {
slave->mtd.suspend = part_suspend;
slave->mtd.resume = part_resume;
}
slave->mtd.erase = part_erase;
slave->master = master;
slave->offset = part->offset;
- slave->index = partno;
if (slave->offset == MTDPART_OFS_APPEND)
slave->offset = cur_offset;
if (slave->offset == MTDPART_OFS_NXTBLK) {
slave->offset = cur_offset;
- if ((cur_offset % master->erasesize) != 0) {
+ if (mtd_mod_by_eb(cur_offset, master) != 0) {
/* Round up to next erasesize */
- slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
+ slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
printk(KERN_NOTICE "Moving partition %d: "
- "0x%08x -> 0x%08x\n", partno,
- cur_offset, slave->offset);
+ "0x%012llx -> 0x%012llx\n", partno,
+ (unsigned long long)cur_offset, (unsigned long long)slave->offset);
}
}
if (slave->mtd.size == MTDPART_SIZ_FULL)
slave->mtd.size = master->size - slave->offset;
- printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
- slave->offset + slave->mtd.size, slave->mtd.name);
+ printk(KERN_NOTICE "0x%012llx-0x%012llx : \"%s\"\n", (unsigned long long)slave->offset,
+ (unsigned long long)(slave->offset + slave->mtd.size), slave->mtd.name);
/* let's do some sanity checks */
if (slave->offset >= master->size) {
- /* let's register it anyway to preserve ordering */
+ /* let's register it anyway to preserve ordering */
slave->offset = 0;
slave->mtd.size = 0;
- printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
+ printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n",
part->name);
+ goto out_register;
}
if (slave->offset + slave->mtd.size > master->size) {
slave->mtd.size = master->size - slave->offset;
- printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
- part->name, master->name, slave->mtd.size);
+ printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n",
+ part->name, master->name, (unsigned long long)slave->mtd.size);
}
- if (master->numeraseregions>1) {
+ if (master->numeraseregions > 1) {
/* Deal with variable erase size stuff */
- int i;
+ int i, max = master->numeraseregions;
+ u64 end = slave->offset + slave->mtd.size;
struct mtd_erase_region_info *regions = master->eraseregions;
- /* Find the first erase regions which is part of this partition. */
- for (i=0; i < master->numeraseregions && regions[i].offset <= slave->offset; i++)
+ /* Find the first erase regions which is part of this
+ * partition. */
+ for (i = 0; i < max && regions[i].offset <= slave->offset; i++)
;
+ /* The loop searched for the region _behind_ the first one */
+ if (i > 0)
+ i--;
- for (i--; i < master->numeraseregions && regions[i].offset < slave->offset + slave->mtd.size; i++) {
+ /* Pick biggest erasesize */
+ for (; i < max && regions[i].offset < end; i++) {
if (slave->mtd.erasesize < regions[i].erasesize) {
slave->mtd.erasesize = regions[i].erasesize;
}
}
+ BUG_ON(slave->mtd.erasesize == 0);
} else {
/* Single erase size */
slave->mtd.erasesize = master->erasesize;
}
if ((slave->mtd.flags & MTD_WRITEABLE) &&
- (slave->offset % slave->mtd.erasesize)) {
+ mtd_mod_by_eb(slave->offset, &slave->mtd)) {
/* Doesn't start on a boundary of major erase size */
- /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
+ /* FIXME: Let it be writable if it is on a boundary of
+ * _minor_ erase size though */
slave->mtd.flags &= ~MTD_WRITEABLE;
- printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
+ printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
part->name);
}
if ((slave->mtd.flags & MTD_WRITEABLE) &&
- (slave->mtd.size % slave->mtd.erasesize)) {
+ mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) {
slave->mtd.flags &= ~MTD_WRITEABLE;
- printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
+ printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
part->name);
}
slave->mtd.ecclayout = master->ecclayout;
if (master->block_isbad) {
- uint32_t offs = 0;
+ uint64_t offs = 0;
- while(offs < slave->mtd.size) {
+ while (offs < slave->mtd.size) {
if (master->block_isbad(master,
offs + slave->offset))
slave->mtd.ecc_stats.badblocks++;
}
}
- if(part->mtdp) { /* store the object pointer (caller may or may not register it */
- *part->mtdp = &slave->mtd;
- slave->registered = 0;
- } else {
- /* register our partition */
- add_mtd_device(&slave->mtd);
- slave->registered = 1;
- }
+out_register:
+ /* register our partition */
+ add_mtd_device(&slave->mtd);
+
return slave;
}
* This function, given a master MTD object and a partition table, creates
* and registers slave MTD objects which are bound to the master according to
* the partition definitions.
- * (Q: should we register the master MTD object as well?)
+ *
+ * We don't register the master, or expect the caller to have done so,
+ * for reasons of data integrity.
*/
int add_mtd_partitions(struct mtd_info *master,
int nbparts)
{
struct mtd_part *slave;
- u_int32_t cur_offset = 0;
+ uint64_t cur_offset = 0;
int i;
- printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
+ printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
for (i = 0; i < nbparts; i++) {
slave = add_one_partition(master, parts + i, i, cur_offset);
return 0;
}
-
EXPORT_SYMBOL(add_mtd_partitions);
-EXPORT_SYMBOL(del_mtd_partitions);
static DEFINE_SPINLOCK(part_parser_lock);
static LIST_HEAD(part_parsers);
return 0;
}
+EXPORT_SYMBOL_GPL(register_mtd_parser);
int deregister_mtd_parser(struct mtd_part_parser *p)
{
spin_unlock(&part_parser_lock);
return 0;
}
+EXPORT_SYMBOL_GPL(deregister_mtd_parser);
int parse_mtd_partitions(struct mtd_info *master, const char **types,
struct mtd_partition **pparts, unsigned long origin)
for ( ; ret <= 0 && *types; types++) {
parser = get_partition_parser(*types);
-#ifdef CONFIG_KMOD
if (!parser && !request_module("%s", *types))
parser = get_partition_parser(*types);
-#endif
if (!parser) {
printk(KERN_NOTICE "%s partition parsing not available\n",
*types);
}
return ret;
}
-
EXPORT_SYMBOL_GPL(parse_mtd_partitions);
-EXPORT_SYMBOL_GPL(register_mtd_parser);
-EXPORT_SYMBOL_GPL(deregister_mtd_parser);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff