* Copyright (c) International Business Machines Corp., 2006
* Copyright (c) Nokia Corporation, 2007
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*
* Author: Artem Bityutskiy (Битюцкий Артём),
* Frank Haverkamp
* module load parameters or the kernel boot parameters. If MTD devices were
* specified, UBI does not attach any MTD device, but it is possible to do
* later using the "UBI control device".
- *
- * At the moment we only attach UBI devices by scanning, which will become a
- * bottleneck when flashes reach certain large size. Then one may improve UBI
- * and add other methods, although it does not seem to be easy to do.
*/
-#ifdef UBI_LINUX
-#include <linux/err.h>
+#define __UBOOT__
+#ifndef __UBOOT__
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/stringify.h>
+#include <linux/namei.h>
#include <linux/stat.h>
#include <linux/miscdevice.h>
#include <linux/log2.h>
#include <linux/kthread.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/major.h>
+#else
+#include <linux/compat.h>
#endif
+#include <linux/err.h>
#include <ubi_uboot.h>
+#include <linux/mtd/partitions.h>
+
#include "ubi.h"
/* Maximum length of the 'mtd=' parameter */
#define MTD_PARAM_LEN_MAX 64
+/* Maximum number of comma-separated items in the 'mtd=' parameter */
+#define MTD_PARAM_MAX_COUNT 4
+
+/* Maximum value for the number of bad PEBs per 1024 PEBs */
+#define MAX_MTD_UBI_BEB_LIMIT 768
+
+#ifdef CONFIG_MTD_UBI_MODULE
+#define ubi_is_module() 1
+#else
+#define ubi_is_module() 0
+#endif
+
+#if (CONFIG_SYS_MALLOC_LEN < (512 << 10))
+#error Malloc area too small for UBI, increase CONFIG_SYS_MALLOC_LEN to >= 512k
+#endif
+
/**
* struct mtd_dev_param - MTD device parameter description data structure.
- * @name: MTD device name or number string
+ * @name: MTD character device node path, MTD device name, or MTD device number
+ * string
* @vid_hdr_offs: VID header offset
+ * @max_beb_per1024: maximum expected number of bad PEBs per 1024 PEBs
*/
-struct mtd_dev_param
-{
+struct mtd_dev_param {
char name[MTD_PARAM_LEN_MAX];
+ int ubi_num;
int vid_hdr_offs;
+ int max_beb_per1024;
};
/* Numbers of elements set in the @mtd_dev_param array */
-static int mtd_devs = 0;
+static int __initdata mtd_devs;
/* MTD devices specification parameters */
-static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES];
-
+static struct mtd_dev_param __initdata mtd_dev_param[UBI_MAX_DEVICES];
+#ifndef __UBOOT__
+#ifdef CONFIG_MTD_UBI_FASTMAP
+/* UBI module parameter to enable fastmap automatically on non-fastmap images */
+static bool fm_autoconvert;
+#endif
+#else
+#ifdef CONFIG_MTD_UBI_FASTMAP
+#if !defined(CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT)
+#define CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT 0
+#endif
+static bool fm_autoconvert = CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT;
+#endif
+#endif
/* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */
struct class *ubi_class;
-#ifdef UBI_LINUX
/* Slab cache for wear-leveling entries */
struct kmem_cache *ubi_wl_entry_slab;
+#ifndef __UBOOT__
/* UBI control character device */
static struct miscdevice ubi_ctrl_cdev = {
.minor = MISC_DYNAMIC_MINOR,
#endif
/* All UBI devices in system */
+#ifndef __UBOOT__
+static struct ubi_device *ubi_devices[UBI_MAX_DEVICES];
+#else
struct ubi_device *ubi_devices[UBI_MAX_DEVICES];
+#endif
-#ifdef UBI_LINUX
+#ifndef __UBOOT__
/* Serializes UBI devices creations and removals */
DEFINE_MUTEX(ubi_devices_mutex);
static DEFINE_SPINLOCK(ubi_devices_lock);
/* "Show" method for files in '/<sysfs>/class/ubi/' */
-static ssize_t ubi_version_show(struct class *class, char *buf)
+static ssize_t ubi_version_show(struct class *class,
+ struct class_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", UBI_VERSION);
}
__ATTR(mtd_num, S_IRUGO, dev_attribute_show, NULL);
#endif
+/**
+ * ubi_volume_notify - send a volume change notification.
+ * @ubi: UBI device description object
+ * @vol: volume description object of the changed volume
+ * @ntype: notification type to send (%UBI_VOLUME_ADDED, etc)
+ *
+ * This is a helper function which notifies all subscribers about a volume
+ * change event (creation, removal, re-sizing, re-naming, updating). Returns
+ * zero in case of success and a negative error code in case of failure.
+ */
+int ubi_volume_notify(struct ubi_device *ubi, struct ubi_volume *vol, int ntype)
+{
+ struct ubi_notification nt;
+
+ ubi_do_get_device_info(ubi, &nt.di);
+ ubi_do_get_volume_info(ubi, vol, &nt.vi);
+
+#ifdef CONFIG_MTD_UBI_FASTMAP
+ switch (ntype) {
+ case UBI_VOLUME_ADDED:
+ case UBI_VOLUME_REMOVED:
+ case UBI_VOLUME_RESIZED:
+ case UBI_VOLUME_RENAMED:
+ if (ubi_update_fastmap(ubi)) {
+ ubi_err("Unable to update fastmap!");
+ ubi_ro_mode(ubi);
+ }
+ }
+#endif
+ return blocking_notifier_call_chain(&ubi_notifiers, ntype, &nt);
+}
+
+/**
+ * ubi_notify_all - send a notification to all volumes.
+ * @ubi: UBI device description object
+ * @ntype: notification type to send (%UBI_VOLUME_ADDED, etc)
+ * @nb: the notifier to call
+ *
+ * This function walks all volumes of UBI device @ubi and sends the @ntype
+ * notification for each volume. If @nb is %NULL, then all registered notifiers
+ * are called, otherwise only the @nb notifier is called. Returns the number of
+ * sent notifications.
+ */
+int ubi_notify_all(struct ubi_device *ubi, int ntype, struct notifier_block *nb)
+{
+ struct ubi_notification nt;
+ int i, count = 0;
+#ifndef __UBOOT__
+ int ret;
+#endif
+
+ ubi_do_get_device_info(ubi, &nt.di);
+
+ mutex_lock(&ubi->device_mutex);
+ for (i = 0; i < ubi->vtbl_slots; i++) {
+ /*
+ * Since the @ubi->device is locked, and we are not going to
+ * change @ubi->volumes, we do not have to lock
+ * @ubi->volumes_lock.
+ */
+ if (!ubi->volumes[i])
+ continue;
+
+ ubi_do_get_volume_info(ubi, ubi->volumes[i], &nt.vi);
+#ifndef __UBOOT__
+ if (nb)
+ nb->notifier_call(nb, ntype, &nt);
+ else
+ ret = blocking_notifier_call_chain(&ubi_notifiers, ntype,
+ &nt);
+#endif
+ count += 1;
+ }
+ mutex_unlock(&ubi->device_mutex);
+
+ return count;
+}
+
+/**
+ * ubi_enumerate_volumes - send "add" notification for all existing volumes.
+ * @nb: the notifier to call
+ *
+ * This function walks all UBI devices and volumes and sends the
+ * %UBI_VOLUME_ADDED notification for each volume. If @nb is %NULL, then all
+ * registered notifiers are called, otherwise only the @nb notifier is called.
+ * Returns the number of sent notifications.
+ */
+int ubi_enumerate_volumes(struct notifier_block *nb)
+{
+ int i, count = 0;
+
+ /*
+ * Since the @ubi_devices_mutex is locked, and we are not going to
+ * change @ubi_devices, we do not have to lock @ubi_devices_lock.
+ */
+ for (i = 0; i < UBI_MAX_DEVICES; i++) {
+ struct ubi_device *ubi = ubi_devices[i];
+
+ if (!ubi)
+ continue;
+ count += ubi_notify_all(ubi, UBI_VOLUME_ADDED, nb);
+ }
+
+ return count;
+}
+
/**
* ubi_get_device - get UBI device.
* @ubi_num: UBI device number
}
/**
- * ubi_get_by_major - get UBI device description object by character device
- * major number.
+ * ubi_get_by_major - get UBI device by character device major number.
* @major: major number
*
* This function is similar to 'ubi_get_device()', but it searches the device
return ubi_num;
}
-#ifdef UBI_LINUX
+#ifndef __UBOOT__
/* "Show" method for files in '/<sysfs>/class/ubi/ubiX/' */
static ssize_t dev_attribute_show(struct device *dev,
struct device_attribute *attr, char *buf)
return ret;
}
-/* Fake "release" method for UBI devices */
-static void dev_release(struct device *dev) { }
+static void dev_release(struct device *dev)
+{
+ struct ubi_device *ubi = container_of(dev, struct ubi_device, dev);
+
+ kfree(ubi);
+}
/**
* ubi_sysfs_init - initialize sysfs for an UBI device.
* @ubi: UBI device description object
+ * @ref: set to %1 on exit in case of failure if a reference to @ubi->dev was
+ * taken
*
* This function returns zero in case of success and a negative error code in
* case of failure.
*/
-static int ubi_sysfs_init(struct ubi_device *ubi)
+static int ubi_sysfs_init(struct ubi_device *ubi, int *ref)
{
int err;
ubi->dev.release = dev_release;
ubi->dev.devt = ubi->cdev.dev;
ubi->dev.class = ubi_class;
- sprintf(&ubi->dev.bus_id[0], UBI_NAME_STR"%d", ubi->ubi_num);
+ dev_set_name(&ubi->dev, UBI_NAME_STR"%d", ubi->ubi_num);
err = device_register(&ubi->dev);
if (err)
return err;
+ *ref = 1;
err = device_create_file(&ubi->dev, &dev_eraseblock_size);
if (err)
return err;
#endif
/**
- * kill_volumes - destroy all volumes.
+ * kill_volumes - destroy all user volumes.
* @ubi: UBI device description object
*/
static void kill_volumes(struct ubi_device *ubi)
/**
* uif_init - initialize user interfaces for an UBI device.
* @ubi: UBI device description object
+ * @ref: set to %1 on exit in case of failure if a reference to @ubi->dev was
+ * taken, otherwise set to %0
+ *
+ * This function initializes various user interfaces for an UBI device. If the
+ * initialization fails at an early stage, this function frees all the
+ * resources it allocated, returns an error, and @ref is set to %0. However,
+ * if the initialization fails after the UBI device was registered in the
+ * driver core subsystem, this function takes a reference to @ubi->dev, because
+ * otherwise the release function ('dev_release()') would free whole @ubi
+ * object. The @ref argument is set to %1 in this case. The caller has to put
+ * this reference.
*
* This function returns zero in case of success and a negative error code in
* case of failure.
*/
-static int uif_init(struct ubi_device *ubi)
+static int uif_init(struct ubi_device *ubi, int *ref)
{
int i, err;
-#ifdef UBI_LINUX
+#ifndef __UBOOT__
dev_t dev;
#endif
+ *ref = 0;
sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num);
/*
ubi_assert(MINOR(dev) == 0);
cdev_init(&ubi->cdev, &ubi_cdev_operations);
- dbg_msg("%s major is %u", ubi->ubi_name, MAJOR(dev));
+ dbg_gen("%s major is %u", ubi->ubi_name, MAJOR(dev));
ubi->cdev.owner = THIS_MODULE;
err = cdev_add(&ubi->cdev, dev, 1);
goto out_unreg;
}
- err = ubi_sysfs_init(ubi);
+ err = ubi_sysfs_init(ubi, ref);
if (err)
goto out_sysfs;
out_volumes:
kill_volumes(ubi);
out_sysfs:
+ if (*ref)
+ get_device(&ubi->dev);
ubi_sysfs_close(ubi);
cdev_del(&ubi->cdev);
out_unreg:
/**
* uif_close - close user interfaces for an UBI device.
* @ubi: UBI device description object
+ *
+ * Note, since this function un-registers UBI volume device objects (@vol->dev),
+ * the memory allocated voe the volumes is freed as well (in the release
+ * function).
*/
static void uif_close(struct ubi_device *ubi)
{
}
/**
- * attach_by_scanning - attach an MTD device using scanning method.
- * @ubi: UBI device descriptor
- *
- * This function returns zero in case of success and a negative error code in
- * case of failure.
- *
- * Note, currently this is the only method to attach UBI devices. Hopefully in
- * the future we'll have more scalable attaching methods and avoid full media
- * scanning. But even in this case scanning will be needed as a fall-back
- * attaching method if there are some on-flash table corruptions.
+ * ubi_free_internal_volumes - free internal volumes.
+ * @ubi: UBI device description object
*/
-static int attach_by_scanning(struct ubi_device *ubi)
+void ubi_free_internal_volumes(struct ubi_device *ubi)
{
- int err;
- struct ubi_scan_info *si;
-
- si = ubi_scan(ubi);
- if (IS_ERR(si))
- return PTR_ERR(si);
+ int i;
- ubi->bad_peb_count = si->bad_peb_count;
- ubi->good_peb_count = ubi->peb_count - ubi->bad_peb_count;
- ubi->max_ec = si->max_ec;
- ubi->mean_ec = si->mean_ec;
+ for (i = ubi->vtbl_slots;
+ i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
+ kfree(ubi->volumes[i]->eba_tbl);
+ kfree(ubi->volumes[i]);
+ }
+}
- err = ubi_read_volume_table(ubi, si);
- if (err)
- goto out_si;
+static int get_bad_peb_limit(const struct ubi_device *ubi, int max_beb_per1024)
+{
+ int limit, device_pebs;
+ uint64_t device_size;
- err = ubi_wl_init_scan(ubi, si);
- if (err)
- goto out_vtbl;
+ if (!max_beb_per1024)
+ return 0;
- err = ubi_eba_init_scan(ubi, si);
- if (err)
- goto out_wl;
+ /*
+ * Here we are using size of the entire flash chip and
+ * not just the MTD partition size because the maximum
+ * number of bad eraseblocks is a percentage of the
+ * whole device and bad eraseblocks are not fairly
+ * distributed over the flash chip. So the worst case
+ * is that all the bad eraseblocks of the chip are in
+ * the MTD partition we are attaching (ubi->mtd).
+ */
+ device_size = mtd_get_device_size(ubi->mtd);
+ device_pebs = mtd_div_by_eb(device_size, ubi->mtd);
+ limit = mult_frac(device_pebs, max_beb_per1024, 1024);
- ubi_scan_destroy_si(si);
- return 0;
+ /* Round it up */
+ if (mult_frac(limit, 1024, max_beb_per1024) < device_pebs)
+ limit += 1;
-out_wl:
- ubi_wl_close(ubi);
-out_vtbl:
- vfree(ubi->vtbl);
-out_si:
- ubi_scan_destroy_si(si);
- return err;
+ return limit;
}
/**
- * io_init - initialize I/O unit for a given UBI device.
+ * io_init - initialize I/O sub-system for a given UBI device.
* @ubi: UBI device description object
+ * @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
*
* If @ubi->vid_hdr_offset or @ubi->leb_start is zero, default offsets are
* assumed:
* This function returns zero in case of success and a negative error code in
* case of failure.
*/
-static int io_init(struct ubi_device *ubi)
+static int io_init(struct ubi_device *ubi, int max_beb_per1024)
{
+ dbg_gen("sizeof(struct ubi_ainf_peb) %zu", sizeof(struct ubi_ainf_peb));
+ dbg_gen("sizeof(struct ubi_wl_entry) %zu", sizeof(struct ubi_wl_entry));
+
if (ubi->mtd->numeraseregions != 0) {
/*
* Some flashes have several erase regions. Different regions
*/
ubi->peb_size = ubi->mtd->erasesize;
- ubi->peb_count = ubi->mtd->size / ubi->mtd->erasesize;
+ ubi->peb_count = mtd_div_by_eb(ubi->mtd->size, ubi->mtd);
ubi->flash_size = ubi->mtd->size;
- if (ubi->mtd->block_isbad && ubi->mtd->block_markbad)
+ if (mtd_can_have_bb(ubi->mtd)) {
ubi->bad_allowed = 1;
+ ubi->bad_peb_limit = get_bad_peb_limit(ubi, max_beb_per1024);
+ }
+
+ if (ubi->mtd->type == MTD_NORFLASH) {
+ ubi_assert(ubi->mtd->writesize == 1);
+ ubi->nor_flash = 1;
+ }
ubi->min_io_size = ubi->mtd->writesize;
ubi->hdrs_min_io_size = ubi->mtd->writesize >> ubi->mtd->subpage_sft;
ubi_assert(ubi->hdrs_min_io_size <= ubi->min_io_size);
ubi_assert(ubi->min_io_size % ubi->hdrs_min_io_size == 0);
+ ubi->max_write_size = ubi->mtd->writebufsize;
+ /*
+ * Maximum write size has to be greater or equivalent to min. I/O
+ * size, and be multiple of min. I/O size.
+ */
+ if (ubi->max_write_size < ubi->min_io_size ||
+ ubi->max_write_size % ubi->min_io_size ||
+ !is_power_of_2(ubi->max_write_size)) {
+ ubi_err("bad write buffer size %d for %d min. I/O unit",
+ ubi->max_write_size, ubi->min_io_size);
+ return -EINVAL;
+ }
+
/* Calculate default aligned sizes of EC and VID headers */
ubi->ec_hdr_alsize = ALIGN(UBI_EC_HDR_SIZE, ubi->hdrs_min_io_size);
ubi->vid_hdr_alsize = ALIGN(UBI_VID_HDR_SIZE, ubi->hdrs_min_io_size);
- dbg_msg("min_io_size %d", ubi->min_io_size);
- dbg_msg("hdrs_min_io_size %d", ubi->hdrs_min_io_size);
- dbg_msg("ec_hdr_alsize %d", ubi->ec_hdr_alsize);
- dbg_msg("vid_hdr_alsize %d", ubi->vid_hdr_alsize);
+ dbg_gen("min_io_size %d", ubi->min_io_size);
+ dbg_gen("max_write_size %d", ubi->max_write_size);
+ dbg_gen("hdrs_min_io_size %d", ubi->hdrs_min_io_size);
+ dbg_gen("ec_hdr_alsize %d", ubi->ec_hdr_alsize);
+ dbg_gen("vid_hdr_alsize %d", ubi->vid_hdr_alsize);
if (ubi->vid_hdr_offset == 0)
/* Default offset */
}
/* Similar for the data offset */
- ubi->leb_start = ubi->vid_hdr_offset + UBI_EC_HDR_SIZE;
+ ubi->leb_start = ubi->vid_hdr_offset + UBI_VID_HDR_SIZE;
ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size);
- dbg_msg("vid_hdr_offset %d", ubi->vid_hdr_offset);
- dbg_msg("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset);
- dbg_msg("vid_hdr_shift %d", ubi->vid_hdr_shift);
- dbg_msg("leb_start %d", ubi->leb_start);
+ dbg_gen("vid_hdr_offset %d", ubi->vid_hdr_offset);
+ dbg_gen("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset);
+ dbg_gen("vid_hdr_shift %d", ubi->vid_hdr_shift);
+ dbg_gen("leb_start %d", ubi->leb_start);
/* The shift must be aligned to 32-bit boundary */
if (ubi->vid_hdr_shift % 4) {
return -EINVAL;
}
+ /*
+ * Set maximum amount of physical erroneous eraseblocks to be 10%.
+ * Erroneous PEB are those which have read errors.
+ */
+ ubi->max_erroneous = ubi->peb_count / 10;
+ if (ubi->max_erroneous < 16)
+ ubi->max_erroneous = 16;
+ dbg_gen("max_erroneous %d", ubi->max_erroneous);
+
/*
* It may happen that EC and VID headers are situated in one minimal
* I/O unit. In this case we can only accept this UBI image in
* read-only mode.
*/
if (ubi->vid_hdr_offset + UBI_VID_HDR_SIZE <= ubi->hdrs_min_io_size) {
- ubi_warn("EC and VID headers are in the same minimal I/O unit, "
- "switch to read-only mode");
+ ubi_warn("EC and VID headers are in the same minimal I/O unit, switch to read-only mode");
ubi->ro_mode = 1;
}
ubi->leb_size = ubi->peb_size - ubi->leb_start;
if (!(ubi->mtd->flags & MTD_WRITEABLE)) {
- ubi_msg("MTD device %d is write-protected, attach in "
- "read-only mode", ubi->mtd->index);
+ ubi_msg("MTD device %d is write-protected, attach in read-only mode",
+ ubi->mtd->index);
ubi->ro_mode = 1;
}
- ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
- ubi->peb_size, ubi->peb_size >> 10);
- ubi_msg("logical eraseblock size: %d bytes", ubi->leb_size);
- ubi_msg("smallest flash I/O unit: %d", ubi->min_io_size);
- if (ubi->hdrs_min_io_size != ubi->min_io_size)
- ubi_msg("sub-page size: %d",
- ubi->hdrs_min_io_size);
- ubi_msg("VID header offset: %d (aligned %d)",
- ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
- ubi_msg("data offset: %d", ubi->leb_start);
-
/*
- * Note, ideally, we have to initialize ubi->bad_peb_count here. But
+ * Note, ideally, we have to initialize @ubi->bad_peb_count here. But
* unfortunately, MTD does not provide this information. We should loop
* over all physical eraseblocks and invoke mtd->block_is_bad() for
- * each physical eraseblock. So, we skip ubi->bad_peb_count
- * uninitialized and initialize it after scanning.
+ * each physical eraseblock. So, we leave @ubi->bad_peb_count
+ * uninitialized so far.
*/
return 0;
* @ubi: UBI device description object
* @vol_id: ID of the volume to re-size
*
- * This function re-sizes the volume marked by the @UBI_VTBL_AUTORESIZE_FLG in
+ * This function re-sizes the volume marked by the %UBI_VTBL_AUTORESIZE_FLG in
* the volume table to the largest possible size. See comments in ubi-header.h
* for more description of the flag. Returns zero in case of success and a
* negative error code in case of failure.
struct ubi_volume *vol = ubi->volumes[vol_id];
int err, old_reserved_pebs = vol->reserved_pebs;
+ if (ubi->ro_mode) {
+ ubi_warn("skip auto-resize because of R/O mode");
+ return 0;
+ }
+
/*
* Clear the auto-resize flag in the volume in-memory copy of the
- * volume table, and 'ubi_resize_volume()' will propogate this change
+ * volume table, and 'ubi_resize_volume()' will propagate this change
* to the flash.
*/
ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG;
struct ubi_vtbl_record vtbl_rec;
/*
- * No avalilable PEBs to re-size the volume, clear the flag on
+ * No available PEBs to re-size the volume, clear the flag on
* flash and exit.
*/
- memcpy(&vtbl_rec, &ubi->vtbl[vol_id],
- sizeof(struct ubi_vtbl_record));
+ vtbl_rec = ubi->vtbl[vol_id];
err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
if (err)
ubi_err("cannot clean auto-resize flag for volume %d",
/**
* ubi_attach_mtd_dev - attach an MTD device.
- * @mtd_dev: MTD device description object
+ * @mtd: MTD device description object
* @ubi_num: number to assign to the new UBI device
* @vid_hdr_offset: VID header offset
+ * @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
*
* This function attaches MTD device @mtd_dev to UBI and assign @ubi_num number
* to the newly created UBI device, unless @ubi_num is %UBI_DEV_NUM_AUTO, in
- * which case this function finds a vacant device nubert and assings it
+ * which case this function finds a vacant device number and assigns it
* automatically. Returns the new UBI device number in case of success and a
* negative error code in case of failure.
*
* Note, the invocations of this function has to be serialized by the
* @ubi_devices_mutex.
*/
-int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
+int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
+ int vid_hdr_offset, int max_beb_per1024)
{
struct ubi_device *ubi;
- int i, err;
+ int i, err, ref = 0;
+
+ if (max_beb_per1024 < 0 || max_beb_per1024 > MAX_MTD_UBI_BEB_LIMIT)
+ return -EINVAL;
+
+ if (!max_beb_per1024)
+ max_beb_per1024 = CONFIG_MTD_UBI_BEB_LIMIT;
/*
* Check if we already have the same MTD device attached.
for (i = 0; i < UBI_MAX_DEVICES; i++) {
ubi = ubi_devices[i];
if (ubi && mtd->index == ubi->mtd->index) {
- dbg_err("mtd%d is already attached to ubi%d",
+ ubi_err("mtd%d is already attached to ubi%d",
mtd->index, i);
return -EEXIST;
}
* no sense to attach emulated MTD devices, so we prohibit this.
*/
if (mtd->type == MTD_UBIVOLUME) {
- ubi_err("refuse attaching mtd%d - it is already emulated on "
- "top of UBI", mtd->index);
+ ubi_err("refuse attaching mtd%d - it is already emulated on top of UBI",
+ mtd->index);
return -EINVAL;
}
if (!ubi_devices[ubi_num])
break;
if (ubi_num == UBI_MAX_DEVICES) {
- dbg_err("only %d UBI devices may be created", UBI_MAX_DEVICES);
+ ubi_err("only %d UBI devices may be created",
+ UBI_MAX_DEVICES);
return -ENFILE;
}
} else {
/* Make sure ubi_num is not busy */
if (ubi_devices[ubi_num]) {
- dbg_err("ubi%d already exists", ubi_num);
+ ubi_err("ubi%d already exists", ubi_num);
return -EEXIST;
}
}
ubi->vid_hdr_offset = vid_hdr_offset;
ubi->autoresize_vol_id = -1;
+#ifdef CONFIG_MTD_UBI_FASTMAP
+ ubi->fm_pool.used = ubi->fm_pool.size = 0;
+ ubi->fm_wl_pool.used = ubi->fm_wl_pool.size = 0;
+
+ /*
+ * fm_pool.max_size is 5% of the total number of PEBs but it's also
+ * between UBI_FM_MAX_POOL_SIZE and UBI_FM_MIN_POOL_SIZE.
+ */
+ ubi->fm_pool.max_size = min(((int)mtd_div_by_eb(ubi->mtd->size,
+ ubi->mtd) / 100) * 5, UBI_FM_MAX_POOL_SIZE);
+ if (ubi->fm_pool.max_size < UBI_FM_MIN_POOL_SIZE)
+ ubi->fm_pool.max_size = UBI_FM_MIN_POOL_SIZE;
+
+ ubi->fm_wl_pool.max_size = UBI_FM_WL_POOL_SIZE;
+ ubi->fm_disabled = !fm_autoconvert;
+
+ if (!ubi->fm_disabled && (int)mtd_div_by_eb(ubi->mtd->size, ubi->mtd)
+ <= UBI_FM_MAX_START) {
+ ubi_err("More than %i PEBs are needed for fastmap, sorry.",
+ UBI_FM_MAX_START);
+ ubi->fm_disabled = 1;
+ }
+
+ ubi_msg("default fastmap pool size: %d", ubi->fm_pool.max_size);
+ ubi_msg("default fastmap WL pool size: %d", ubi->fm_wl_pool.max_size);
+#else
+ ubi->fm_disabled = 1;
+#endif
mutex_init(&ubi->buf_mutex);
mutex_init(&ubi->ckvol_mutex);
- mutex_init(&ubi->volumes_mutex);
+ mutex_init(&ubi->device_mutex);
spin_lock_init(&ubi->volumes_lock);
+ mutex_init(&ubi->fm_mutex);
+ init_rwsem(&ubi->fm_sem);
ubi_msg("attaching mtd%d to ubi%d", mtd->index, ubi_num);
- err = io_init(ubi);
+ err = io_init(ubi, max_beb_per1024);
if (err)
goto out_free;
- ubi->peb_buf1 = vmalloc(ubi->peb_size);
- if (!ubi->peb_buf1)
+ err = -ENOMEM;
+ ubi->peb_buf = vmalloc(ubi->peb_size);
+ if (!ubi->peb_buf)
goto out_free;
- ubi->peb_buf2 = vmalloc(ubi->peb_size);
- if (!ubi->peb_buf2)
- goto out_free;
-
-#ifdef CONFIG_MTD_UBI_DEBUG
- mutex_init(&ubi->dbg_buf_mutex);
- ubi->dbg_peb_buf = vmalloc(ubi->peb_size);
- if (!ubi->dbg_peb_buf)
- goto out_free;
+#ifdef CONFIG_MTD_UBI_FASTMAP
+ ubi->fm_size = ubi_calc_fm_size(ubi);
+ ubi->fm_buf = vzalloc(ubi->fm_size);
+ if (!ubi->fm_buf)
+ goto out_free;
#endif
-
- err = attach_by_scanning(ubi);
+ err = ubi_attach(ubi, 0);
if (err) {
- dbg_err("failed to attach by scanning, error %d", err);
+ ubi_err("failed to attach mtd%d, error %d", mtd->index, err);
goto out_free;
}
goto out_detach;
}
- err = uif_init(ubi);
+ err = uif_init(ubi, &ref);
if (err)
goto out_detach;
- ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name);
+ err = ubi_debugfs_init_dev(ubi);
+ if (err)
+ goto out_uif;
+
+ ubi->bgt_thread = kthread_create(ubi_thread, ubi, "%s", ubi->bgt_name);
if (IS_ERR(ubi->bgt_thread)) {
err = PTR_ERR(ubi->bgt_thread);
ubi_err("cannot spawn \"%s\", error %d", ubi->bgt_name,
err);
- goto out_uif;
+ goto out_debugfs;
}
- ubi_msg("attached mtd%d to ubi%d", mtd->index, ubi_num);
- ubi_msg("MTD device name: \"%s\"", mtd->name);
- ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20);
- ubi_msg("number of good PEBs: %d", ubi->good_peb_count);
- ubi_msg("number of bad PEBs: %d", ubi->bad_peb_count);
- ubi_msg("max. allowed volumes: %d", ubi->vtbl_slots);
- ubi_msg("wear-leveling threshold: %d", CONFIG_MTD_UBI_WL_THRESHOLD);
- ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
- ubi_msg("number of user volumes: %d",
- ubi->vol_count - UBI_INT_VOL_COUNT);
- ubi_msg("available PEBs: %d", ubi->avail_pebs);
- ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
- ubi_msg("number of PEBs reserved for bad PEB handling: %d",
- ubi->beb_rsvd_pebs);
- ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
-
- /* Enable the background thread */
- if (!DBG_DISABLE_BGT) {
- ubi->thread_enabled = 1;
- wake_up_process(ubi->bgt_thread);
- }
+ ubi_msg("attached mtd%d (name \"%s\", size %llu MiB) to ubi%d",
+ mtd->index, mtd->name, ubi->flash_size >> 20, ubi_num);
+ ubi_msg("PEB size: %d bytes (%d KiB), LEB size: %d bytes",
+ ubi->peb_size, ubi->peb_size >> 10, ubi->leb_size);
+ ubi_msg("min./max. I/O unit sizes: %d/%d, sub-page size %d",
+ ubi->min_io_size, ubi->max_write_size, ubi->hdrs_min_io_size);
+ ubi_msg("VID header offset: %d (aligned %d), data offset: %d",
+ ubi->vid_hdr_offset, ubi->vid_hdr_aloffset, ubi->leb_start);
+ ubi_msg("good PEBs: %d, bad PEBs: %d, corrupted PEBs: %d",
+ ubi->good_peb_count, ubi->bad_peb_count, ubi->corr_peb_count);
+ ubi_msg("user volume: %d, internal volumes: %d, max. volumes count: %d",
+ ubi->vol_count - UBI_INT_VOL_COUNT, UBI_INT_VOL_COUNT,
+ ubi->vtbl_slots);
+ ubi_msg("max/mean erase counter: %d/%d, WL threshold: %d, image sequence number: %u",
+ ubi->max_ec, ubi->mean_ec, CONFIG_MTD_UBI_WL_THRESHOLD,
+ ubi->image_seq);
+ ubi_msg("available PEBs: %d, total reserved PEBs: %d, PEBs reserved for bad PEB handling: %d",
+ ubi->avail_pebs, ubi->rsvd_pebs, ubi->beb_rsvd_pebs);
+
+ /*
+ * The below lock makes sure we do not race with 'ubi_thread()' which
+ * checks @ubi->thread_enabled. Otherwise we may fail to wake it up.
+ */
+ spin_lock(&ubi->wl_lock);
+ ubi->thread_enabled = 1;
+ wake_up_process(ubi->bgt_thread);
+ spin_unlock(&ubi->wl_lock);
ubi_devices[ubi_num] = ubi;
+ ubi_notify_all(ubi, UBI_VOLUME_ADDED, NULL);
return ubi_num;
+out_debugfs:
+ ubi_debugfs_exit_dev(ubi);
out_uif:
+ get_device(&ubi->dev);
+ ubi_assert(ref);
uif_close(ubi);
out_detach:
- ubi_eba_close(ubi);
ubi_wl_close(ubi);
+ ubi_free_internal_volumes(ubi);
vfree(ubi->vtbl);
out_free:
- vfree(ubi->peb_buf1);
- vfree(ubi->peb_buf2);
-#ifdef CONFIG_MTD_UBI_DEBUG
- vfree(ubi->dbg_peb_buf);
-#endif
- kfree(ubi);
+ vfree(ubi->peb_buf);
+ vfree(ubi->fm_buf);
+ if (ref)
+ put_device(&ubi->dev);
+ else
+ kfree(ubi);
return err;
}
if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES)
return -EINVAL;
- spin_lock(&ubi_devices_lock);
- ubi = ubi_devices[ubi_num];
- if (!ubi) {
- spin_unlock(&ubi_devices_lock);
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
return -EINVAL;
- }
+ spin_lock(&ubi_devices_lock);
+ put_device(&ubi->dev);
+ ubi->ref_count -= 1;
if (ubi->ref_count) {
if (!anyway) {
spin_unlock(&ubi_devices_lock);
spin_unlock(&ubi_devices_lock);
ubi_assert(ubi_num == ubi->ubi_num);
- dbg_msg("detaching mtd%d from ubi%d", ubi->mtd->index, ubi_num);
-
+ ubi_notify_all(ubi, UBI_VOLUME_REMOVED, NULL);
+ ubi_msg("detaching mtd%d from ubi%d", ubi->mtd->index, ubi_num);
+#ifdef CONFIG_MTD_UBI_FASTMAP
+ /* If we don't write a new fastmap at detach time we lose all
+ * EC updates that have been made since the last written fastmap. */
+ ubi_update_fastmap(ubi);
+#endif
/*
* Before freeing anything, we have to stop the background thread to
* prevent it from doing anything on this device while we are freeing.
if (ubi->bgt_thread)
kthread_stop(ubi->bgt_thread);
+ /*
+ * Get a reference to the device in order to prevent 'dev_release()'
+ * from freeing the @ubi object.
+ */
+ get_device(&ubi->dev);
+
+ ubi_debugfs_exit_dev(ubi);
uif_close(ubi);
- ubi_eba_close(ubi);
+
ubi_wl_close(ubi);
+ ubi_free_internal_volumes(ubi);
vfree(ubi->vtbl);
put_mtd_device(ubi->mtd);
- vfree(ubi->peb_buf1);
- vfree(ubi->peb_buf2);
-#ifdef CONFIG_MTD_UBI_DEBUG
- vfree(ubi->dbg_peb_buf);
-#endif
+ vfree(ubi->peb_buf);
+ vfree(ubi->fm_buf);
ubi_msg("mtd%d is detached from ubi%d", ubi->mtd->index, ubi->ubi_num);
- kfree(ubi);
+ put_device(&ubi->dev);
return 0;
}
+#ifndef __UBOOT__
/**
- * find_mtd_device - open an MTD device by its name or number.
- * @mtd_dev: name or number of the device
+ * open_mtd_by_chdev - open an MTD device by its character device node path.
+ * @mtd_dev: MTD character device node path
+ *
+ * This helper function opens an MTD device by its character node device path.
+ * Returns MTD device description object in case of success and a negative
+ * error code in case of failure.
+ */
+static struct mtd_info * __init open_mtd_by_chdev(const char *mtd_dev)
+{
+ int err, major, minor, mode;
+ struct path path;
+
+ /* Probably this is an MTD character device node path */
+ err = kern_path(mtd_dev, LOOKUP_FOLLOW, &path);
+ if (err)
+ return ERR_PTR(err);
+
+ /* MTD device number is defined by the major / minor numbers */
+ major = imajor(path.dentry->d_inode);
+ minor = iminor(path.dentry->d_inode);
+ mode = path.dentry->d_inode->i_mode;
+ path_put(&path);
+ if (major != MTD_CHAR_MAJOR || !S_ISCHR(mode))
+ return ERR_PTR(-EINVAL);
+
+ if (minor & 1)
+ /*
+ * Just do not think the "/dev/mtdrX" devices support is need,
+ * so do not support them to avoid doing extra work.
+ */
+ return ERR_PTR(-EINVAL);
+
+ return get_mtd_device(NULL, minor / 2);
+}
+#endif
+
+/**
+ * open_mtd_device - open MTD device by name, character device path, or number.
+ * @mtd_dev: name, character device node path, or MTD device device number
*
* This function tries to open and MTD device described by @mtd_dev string,
- * which is first treated as an ASCII number, and if it is not true, it is
- * treated as MTD device name. Returns MTD device description object in case of
- * success and a negative error code in case of failure.
+ * which is first treated as ASCII MTD device number, and if it is not true, it
+ * is treated as MTD device name, and if that is also not true, it is treated
+ * as MTD character device node path. Returns MTD device description object in
+ * case of success and a negative error code in case of failure.
*/
static struct mtd_info * __init open_mtd_device(const char *mtd_dev)
{
* MTD device name.
*/
mtd = get_mtd_device_nm(mtd_dev);
+#ifndef __UBOOT__
+ if (IS_ERR(mtd) && PTR_ERR(mtd) == -ENODEV)
+ /* Probably this is an MTD character device node path */
+ mtd = open_mtd_by_chdev(mtd_dev);
+#endif
} else
mtd = get_mtd_device(NULL, mtd_num);
return mtd;
}
-int __init ubi_init(void)
+#ifndef __UBOOT__
+static int __init ubi_init(void)
+#else
+int ubi_init(void)
+#endif
{
int err, i, k;
goto out_version;
}
-#ifdef UBI_LINUX
ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab",
sizeof(struct ubi_wl_entry),
0, 0, NULL);
- if (!ubi_wl_entry_slab)
+ if (!ubi_wl_entry_slab) {
+ err = -ENOMEM;
goto out_dev_unreg;
-#endif
+ }
+
+ err = ubi_debugfs_init();
+ if (err)
+ goto out_slab;
+
/* Attach MTD devices */
for (i = 0; i < mtd_devs; i++) {
mtd = open_mtd_device(p->name);
if (IS_ERR(mtd)) {
err = PTR_ERR(mtd);
- goto out_detach;
+ ubi_err("cannot open mtd %s, error %d", p->name, err);
+ /* See comment below re-ubi_is_module(). */
+ if (ubi_is_module())
+ goto out_detach;
+ continue;
}
mutex_lock(&ubi_devices_mutex);
- err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO,
- p->vid_hdr_offs);
+ err = ubi_attach_mtd_dev(mtd, p->ubi_num,
+ p->vid_hdr_offs, p->max_beb_per1024);
mutex_unlock(&ubi_devices_mutex);
if (err < 0) {
- put_mtd_device(mtd);
ubi_err("cannot attach mtd%d", mtd->index);
- goto out_detach;
+ put_mtd_device(mtd);
+
+ /*
+ * Originally UBI stopped initializing on any error.
+ * However, later on it was found out that this
+ * behavior is not very good when UBI is compiled into
+ * the kernel and the MTD devices to attach are passed
+ * through the command line. Indeed, UBI failure
+ * stopped whole boot sequence.
+ *
+ * To fix this, we changed the behavior for the
+ * non-module case, but preserved the old behavior for
+ * the module case, just for compatibility. This is a
+ * little inconsistent, though.
+ */
+ if (ubi_is_module())
+ goto out_detach;
}
}
+ err = ubiblock_init();
+ if (err) {
+ ubi_err("block: cannot initialize, error %d", err);
+
+ /* See comment above re-ubi_is_module(). */
+ if (ubi_is_module())
+ goto out_detach;
+ }
+
return 0;
out_detach:
ubi_detach_mtd_dev(ubi_devices[k]->ubi_num, 1);
mutex_unlock(&ubi_devices_mutex);
}
-#ifdef UBI_LINUX
+ ubi_debugfs_exit();
+out_slab:
kmem_cache_destroy(ubi_wl_entry_slab);
out_dev_unreg:
-#endif
misc_deregister(&ubi_ctrl_cdev);
out_version:
class_remove_file(ubi_class, &ubi_version);
out_class:
class_destroy(ubi_class);
out:
- ubi_err("UBI error: cannot initialize UBI, error %d", err);
+ ubi_err("cannot initialize UBI, error %d", err);
return err;
}
-module_init(ubi_init);
+late_initcall(ubi_init);
-void __exit ubi_exit(void)
+#ifndef __UBOOT__
+static void __exit ubi_exit(void)
+#else
+void ubi_exit(void)
+#endif
{
int i;
+ ubiblock_exit();
+
for (i = 0; i < UBI_MAX_DEVICES; i++)
if (ubi_devices[i]) {
mutex_lock(&ubi_devices_mutex);
ubi_detach_mtd_dev(ubi_devices[i]->ubi_num, 1);
mutex_unlock(&ubi_devices_mutex);
}
+ ubi_debugfs_exit();
kmem_cache_destroy(ubi_wl_entry_slab);
misc_deregister(&ubi_ctrl_cdev);
class_remove_file(ubi_class, &ubi_version);
module_exit(ubi_exit);
/**
- * bytes_str_to_int - convert a string representing number of bytes to an
- * integer.
+ * bytes_str_to_int - convert a number of bytes string into an integer.
* @str: the string to convert
*
* This function returns positive resulting integer in case of success and a
unsigned long result;
result = simple_strtoul(str, &endp, 0);
- if (str == endp || result < 0) {
- printk(KERN_ERR "UBI error: incorrect bytes count: \"%s\"\n",
- str);
+ if (str == endp || result >= INT_MAX) {
+ ubi_err("incorrect bytes count: \"%s\"\n", str);
return -EINVAL;
}
case '\0':
break;
default:
- printk(KERN_ERR "UBI error: incorrect bytes count: \"%s\"\n",
- str);
+ ubi_err("incorrect bytes count: \"%s\"\n", str);
return -EINVAL;
}
return result;
}
+int kstrtoint(const char *s, unsigned int base, int *res)
+{
+ unsigned long long tmp;
+
+ tmp = simple_strtoull(s, NULL, base);
+ if (tmp != (unsigned long long)(int)tmp)
+ return -ERANGE;
+
+ return (int)tmp;
+}
+
/**
* ubi_mtd_param_parse - parse the 'mtd=' UBI parameter.
* @val: the parameter value to parse
* This function returns zero in case of success and a negative error code in
* case of error.
*/
-int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
+#ifndef __UBOOT__
+static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
+#else
+int ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
+#endif
{
int i, len;
struct mtd_dev_param *p;
char buf[MTD_PARAM_LEN_MAX];
char *pbuf = &buf[0];
- char *tokens[2] = {NULL, NULL};
+ char *tokens[MTD_PARAM_MAX_COUNT], *token;
if (!val)
return -EINVAL;
if (mtd_devs == UBI_MAX_DEVICES) {
- printk(KERN_ERR "UBI error: too many parameters, max. is %d\n",
- UBI_MAX_DEVICES);
+ ubi_err("too many parameters, max. is %d\n",
+ UBI_MAX_DEVICES);
return -EINVAL;
}
len = strnlen(val, MTD_PARAM_LEN_MAX);
if (len == MTD_PARAM_LEN_MAX) {
- printk(KERN_ERR "UBI error: parameter \"%s\" is too long, "
- "max. is %d\n", val, MTD_PARAM_LEN_MAX);
+ ubi_err("parameter \"%s\" is too long, max. is %d\n",
+ val, MTD_PARAM_LEN_MAX);
return -EINVAL;
}
if (len == 0) {
- printk(KERN_WARNING "UBI warning: empty 'mtd=' parameter - "
- "ignored\n");
+ pr_warn("UBI warning: empty 'mtd=' parameter - ignored\n");
return 0;
}
if (buf[len - 1] == '\n')
buf[len - 1] = '\0';
- for (i = 0; i < 2; i++)
+ for (i = 0; i < MTD_PARAM_MAX_COUNT; i++)
tokens[i] = strsep(&pbuf, ",");
if (pbuf) {
- printk(KERN_ERR "UBI error: too many arguments at \"%s\"\n",
- val);
+ ubi_err("too many arguments at \"%s\"\n", val);
return -EINVAL;
}
p = &mtd_dev_param[mtd_devs];
strcpy(&p->name[0], tokens[0]);
- if (tokens[1])
- p->vid_hdr_offs = bytes_str_to_int(tokens[1]);
+ token = tokens[1];
+ if (token) {
+ p->vid_hdr_offs = bytes_str_to_int(token);
+
+ if (p->vid_hdr_offs < 0)
+ return p->vid_hdr_offs;
+ }
+
+ token = tokens[2];
+ if (token) {
+ int err = kstrtoint(token, 10, &p->max_beb_per1024);
+
+ if (err) {
+ ubi_err("bad value for max_beb_per1024 parameter: %s",
+ token);
+ return -EINVAL;
+ }
+ }
- if (p->vid_hdr_offs < 0)
- return p->vid_hdr_offs;
+ token = tokens[3];
+ if (token) {
+ int err = kstrtoint(token, 10, &p->ubi_num);
+
+ if (err) {
+ ubi_err("bad value for ubi_num parameter: %s", token);
+ return -EINVAL;
+ }
+ } else
+ p->ubi_num = UBI_DEV_NUM_AUTO;
mtd_devs += 1;
return 0;
}
module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 000);
-MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: "
- "mtd=<name|num>[,<vid_hdr_offs>].\n"
+MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: mtd=<name|num|path>[,<vid_hdr_offs>[,max_beb_per1024[,ubi_num]]].\n"
"Multiple \"mtd\" parameters may be specified.\n"
- "MTD devices may be specified by their number or name.\n"
- "Optional \"vid_hdr_offs\" parameter specifies UBI VID "
- "header position and data starting position to be used "
- "by UBI.\n"
- "Example: mtd=content,1984 mtd=4 - attach MTD device"
- "with name \"content\" using VID header offset 1984, and "
- "MTD device number 4 with default VID header offset.");
-
+ "MTD devices may be specified by their number, name, or path to the MTD character device node.\n"
+ "Optional \"vid_hdr_offs\" parameter specifies UBI VID header position to be used by UBI. (default value if 0)\n"
+ "Optional \"max_beb_per1024\" parameter specifies the maximum expected bad eraseblock per 1024 eraseblocks. (default value ("
+ __stringify(CONFIG_MTD_UBI_BEB_LIMIT) ") if 0)\n"
+ "Optional \"ubi_num\" parameter specifies UBI device number which have to be assigned to the newly created UBI device (assigned automatically by default)\n"
+ "\n"
+ "Example 1: mtd=/dev/mtd0 - attach MTD device /dev/mtd0.\n"
+ "Example 2: mtd=content,1984 mtd=4 - attach MTD device with name \"content\" using VID header offset 1984, and MTD device number 4 with default VID header offset.\n"
+ "Example 3: mtd=/dev/mtd1,0,25 - attach MTD device /dev/mtd1 using default VID header offset and reserve 25*nand_size_in_blocks/1024 erase blocks for bad block handling.\n"
+ "Example 4: mtd=/dev/mtd1,0,0,5 - attach MTD device /dev/mtd1 to UBI 5 and using default values for the other fields.\n"
+ "\t(e.g. if the NAND *chipset* has 4096 PEB, 100 will be reserved for this UBI device).");
+#ifdef CONFIG_MTD_UBI_FASTMAP
+module_param(fm_autoconvert, bool, 0644);
+MODULE_PARM_DESC(fm_autoconvert, "Set this parameter to enable fastmap automatically on images without a fastmap.");
+#endif
MODULE_VERSION(__stringify(UBI_VERSION));
MODULE_DESCRIPTION("UBI - Unsorted Block Images");
MODULE_AUTHOR("Artem Bityutskiy");
projects / karo-tx-uboot.git / blobdiff