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https://github.com/brain-hackers/u-boot-brain
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![Stefan Roese](/assets/img/avatar_default.png)
I just stumbled over some cluttered UBI messages. It seems some newline chars are missing in the current U-Boot UBI source. Lets fix this in U-Boot as well (Linux has those fixes already). Signed-off-by: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de>
1553 lines
44 KiB
C
1553 lines
44 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) International Business Machines Corp., 2006
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* Copyright (c) Nokia Corporation, 2007
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*
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* Author: Artem Bityutskiy (Битюцкий Артём),
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* Frank Haverkamp
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*/
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/*
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* This file includes UBI initialization and building of UBI devices.
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*
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* When UBI is initialized, it attaches all the MTD devices specified as the
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* module load parameters or the kernel boot parameters. If MTD devices were
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* specified, UBI does not attach any MTD device, but it is possible to do
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* later using the "UBI control device".
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*/
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#ifndef __UBOOT__
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/stringify.h>
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#include <linux/namei.h>
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#include <linux/stat.h>
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#include <linux/miscdevice.h>
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#include <linux/log2.h>
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#include <linux/kthread.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/major.h>
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#else
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#include <linux/bug.h>
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#include <linux/log2.h>
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#endif
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#include <linux/err.h>
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#include <ubi_uboot.h>
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#include <linux/mtd/partitions.h>
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#include "ubi.h"
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/* Maximum length of the 'mtd=' parameter */
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#define MTD_PARAM_LEN_MAX 64
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/* Maximum number of comma-separated items in the 'mtd=' parameter */
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#define MTD_PARAM_MAX_COUNT 4
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/* Maximum value for the number of bad PEBs per 1024 PEBs */
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#define MAX_MTD_UBI_BEB_LIMIT 768
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#ifdef CONFIG_MTD_UBI_MODULE
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#define ubi_is_module() 1
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#else
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#define ubi_is_module() 0
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#endif
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#if (CONFIG_SYS_MALLOC_LEN < (512 << 10))
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#error Malloc area too small for UBI, increase CONFIG_SYS_MALLOC_LEN to >= 512k
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#endif
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/**
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* struct mtd_dev_param - MTD device parameter description data structure.
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* @name: MTD character device node path, MTD device name, or MTD device number
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* string
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* @vid_hdr_offs: VID header offset
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* @max_beb_per1024: maximum expected number of bad PEBs per 1024 PEBs
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*/
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struct mtd_dev_param {
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char name[MTD_PARAM_LEN_MAX];
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int ubi_num;
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int vid_hdr_offs;
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int max_beb_per1024;
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};
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/* Numbers of elements set in the @mtd_dev_param array */
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static int __initdata mtd_devs;
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/* MTD devices specification parameters */
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static struct mtd_dev_param __initdata mtd_dev_param[UBI_MAX_DEVICES];
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#ifndef __UBOOT__
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#ifdef CONFIG_MTD_UBI_FASTMAP
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/* UBI module parameter to enable fastmap automatically on non-fastmap images */
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static bool fm_autoconvert;
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static bool fm_debug;
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#endif
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#else
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#ifdef CONFIG_MTD_UBI_FASTMAP
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#if !defined(CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT)
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#define CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT 0
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#endif
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static bool fm_autoconvert = CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT;
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#if !defined(CONFIG_MTD_UBI_FM_DEBUG)
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#define CONFIG_MTD_UBI_FM_DEBUG 0
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#endif
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static bool fm_debug = CONFIG_MTD_UBI_FM_DEBUG;
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#endif
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#endif
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/* Slab cache for wear-leveling entries */
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struct kmem_cache *ubi_wl_entry_slab;
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#ifndef __UBOOT__
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/* UBI control character device */
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static struct miscdevice ubi_ctrl_cdev = {
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.minor = MISC_DYNAMIC_MINOR,
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.name = "ubi_ctrl",
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.fops = &ubi_ctrl_cdev_operations,
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};
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#endif
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/* All UBI devices in system */
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#ifndef __UBOOT__
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static struct ubi_device *ubi_devices[UBI_MAX_DEVICES];
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#else
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struct ubi_device *ubi_devices[UBI_MAX_DEVICES];
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#endif
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#ifndef __UBOOT__
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/* Serializes UBI devices creations and removals */
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DEFINE_MUTEX(ubi_devices_mutex);
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/* Protects @ubi_devices and @ubi->ref_count */
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static DEFINE_SPINLOCK(ubi_devices_lock);
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/* "Show" method for files in '/<sysfs>/class/ubi/' */
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static ssize_t ubi_version_show(struct class *class,
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struct class_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", UBI_VERSION);
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}
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/* UBI version attribute ('/<sysfs>/class/ubi/version') */
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static struct class_attribute ubi_class_attrs[] = {
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__ATTR(version, S_IRUGO, ubi_version_show, NULL),
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__ATTR_NULL
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};
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/* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */
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struct class ubi_class = {
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.name = UBI_NAME_STR,
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.owner = THIS_MODULE,
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.class_attrs = ubi_class_attrs,
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};
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static ssize_t dev_attribute_show(struct device *dev,
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struct device_attribute *attr, char *buf);
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/* UBI device attributes (correspond to files in '/<sysfs>/class/ubi/ubiX') */
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static struct device_attribute dev_eraseblock_size =
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__ATTR(eraseblock_size, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_avail_eraseblocks =
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__ATTR(avail_eraseblocks, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_total_eraseblocks =
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__ATTR(total_eraseblocks, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_volumes_count =
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__ATTR(volumes_count, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_max_ec =
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__ATTR(max_ec, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_reserved_for_bad =
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__ATTR(reserved_for_bad, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_bad_peb_count =
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__ATTR(bad_peb_count, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_max_vol_count =
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__ATTR(max_vol_count, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_min_io_size =
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__ATTR(min_io_size, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_bgt_enabled =
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__ATTR(bgt_enabled, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_mtd_num =
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__ATTR(mtd_num, S_IRUGO, dev_attribute_show, NULL);
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#endif
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/**
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* ubi_volume_notify - send a volume change notification.
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* @ubi: UBI device description object
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* @vol: volume description object of the changed volume
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* @ntype: notification type to send (%UBI_VOLUME_ADDED, etc)
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*
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* This is a helper function which notifies all subscribers about a volume
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* change event (creation, removal, re-sizing, re-naming, updating). Returns
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* zero in case of success and a negative error code in case of failure.
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*/
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int ubi_volume_notify(struct ubi_device *ubi, struct ubi_volume *vol, int ntype)
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{
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int ret;
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struct ubi_notification nt;
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ubi_do_get_device_info(ubi, &nt.di);
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ubi_do_get_volume_info(ubi, vol, &nt.vi);
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switch (ntype) {
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case UBI_VOLUME_ADDED:
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case UBI_VOLUME_REMOVED:
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case UBI_VOLUME_RESIZED:
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case UBI_VOLUME_RENAMED:
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ret = ubi_update_fastmap(ubi);
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if (ret)
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ubi_msg(ubi, "Unable to write a new fastmap: %i", ret);
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}
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return blocking_notifier_call_chain(&ubi_notifiers, ntype, &nt);
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}
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/**
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* ubi_notify_all - send a notification to all volumes.
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* @ubi: UBI device description object
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* @ntype: notification type to send (%UBI_VOLUME_ADDED, etc)
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* @nb: the notifier to call
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*
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* This function walks all volumes of UBI device @ubi and sends the @ntype
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* notification for each volume. If @nb is %NULL, then all registered notifiers
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* are called, otherwise only the @nb notifier is called. Returns the number of
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* sent notifications.
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*/
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int ubi_notify_all(struct ubi_device *ubi, int ntype, struct notifier_block *nb)
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{
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struct ubi_notification nt;
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int i, count = 0;
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#ifndef __UBOOT__
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int ret;
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#endif
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ubi_do_get_device_info(ubi, &nt.di);
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mutex_lock(&ubi->device_mutex);
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for (i = 0; i < ubi->vtbl_slots; i++) {
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/*
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* Since the @ubi->device is locked, and we are not going to
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* change @ubi->volumes, we do not have to lock
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* @ubi->volumes_lock.
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*/
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if (!ubi->volumes[i])
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continue;
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ubi_do_get_volume_info(ubi, ubi->volumes[i], &nt.vi);
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#ifndef __UBOOT__
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if (nb)
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nb->notifier_call(nb, ntype, &nt);
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else
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ret = blocking_notifier_call_chain(&ubi_notifiers, ntype,
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&nt);
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#endif
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count += 1;
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}
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mutex_unlock(&ubi->device_mutex);
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return count;
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}
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/**
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* ubi_enumerate_volumes - send "add" notification for all existing volumes.
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* @nb: the notifier to call
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*
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* This function walks all UBI devices and volumes and sends the
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* %UBI_VOLUME_ADDED notification for each volume. If @nb is %NULL, then all
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* registered notifiers are called, otherwise only the @nb notifier is called.
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* Returns the number of sent notifications.
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*/
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int ubi_enumerate_volumes(struct notifier_block *nb)
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{
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int i, count = 0;
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/*
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* Since the @ubi_devices_mutex is locked, and we are not going to
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* change @ubi_devices, we do not have to lock @ubi_devices_lock.
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*/
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for (i = 0; i < UBI_MAX_DEVICES; i++) {
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struct ubi_device *ubi = ubi_devices[i];
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if (!ubi)
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continue;
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count += ubi_notify_all(ubi, UBI_VOLUME_ADDED, nb);
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}
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return count;
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}
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/**
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* ubi_get_device - get UBI device.
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* @ubi_num: UBI device number
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*
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* This function returns UBI device description object for UBI device number
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* @ubi_num, or %NULL if the device does not exist. This function increases the
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* device reference count to prevent removal of the device. In other words, the
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* device cannot be removed if its reference count is not zero.
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*/
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struct ubi_device *ubi_get_device(int ubi_num)
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{
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struct ubi_device *ubi;
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spin_lock(&ubi_devices_lock);
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ubi = ubi_devices[ubi_num];
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if (ubi) {
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ubi_assert(ubi->ref_count >= 0);
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ubi->ref_count += 1;
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get_device(&ubi->dev);
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}
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spin_unlock(&ubi_devices_lock);
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return ubi;
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}
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/**
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* ubi_put_device - drop an UBI device reference.
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* @ubi: UBI device description object
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*/
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void ubi_put_device(struct ubi_device *ubi)
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{
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spin_lock(&ubi_devices_lock);
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ubi->ref_count -= 1;
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put_device(&ubi->dev);
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spin_unlock(&ubi_devices_lock);
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}
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/**
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* ubi_get_by_major - get UBI device by character device major number.
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* @major: major number
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*
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* This function is similar to 'ubi_get_device()', but it searches the device
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* by its major number.
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*/
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struct ubi_device *ubi_get_by_major(int major)
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{
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int i;
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struct ubi_device *ubi;
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spin_lock(&ubi_devices_lock);
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for (i = 0; i < UBI_MAX_DEVICES; i++) {
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ubi = ubi_devices[i];
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if (ubi && MAJOR(ubi->cdev.dev) == major) {
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ubi_assert(ubi->ref_count >= 0);
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ubi->ref_count += 1;
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get_device(&ubi->dev);
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spin_unlock(&ubi_devices_lock);
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return ubi;
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}
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}
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spin_unlock(&ubi_devices_lock);
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return NULL;
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}
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/**
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* ubi_major2num - get UBI device number by character device major number.
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* @major: major number
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*
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* This function searches UBI device number object by its major number. If UBI
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* device was not found, this function returns -ENODEV, otherwise the UBI device
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* number is returned.
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*/
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int ubi_major2num(int major)
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{
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int i, ubi_num = -ENODEV;
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spin_lock(&ubi_devices_lock);
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for (i = 0; i < UBI_MAX_DEVICES; i++) {
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struct ubi_device *ubi = ubi_devices[i];
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if (ubi && MAJOR(ubi->cdev.dev) == major) {
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ubi_num = ubi->ubi_num;
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break;
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}
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}
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spin_unlock(&ubi_devices_lock);
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return ubi_num;
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}
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#ifndef __UBOOT__
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/* "Show" method for files in '/<sysfs>/class/ubi/ubiX/' */
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static ssize_t dev_attribute_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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ssize_t ret;
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struct ubi_device *ubi;
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/*
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* The below code looks weird, but it actually makes sense. We get the
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* UBI device reference from the contained 'struct ubi_device'. But it
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* is unclear if the device was removed or not yet. Indeed, if the
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* device was removed before we increased its reference count,
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* 'ubi_get_device()' will return -ENODEV and we fail.
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*
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* Remember, 'struct ubi_device' is freed in the release function, so
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* we still can use 'ubi->ubi_num'.
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*/
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ubi = container_of(dev, struct ubi_device, dev);
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ubi = ubi_get_device(ubi->ubi_num);
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if (!ubi)
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return -ENODEV;
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if (attr == &dev_eraseblock_size)
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ret = sprintf(buf, "%d\n", ubi->leb_size);
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else if (attr == &dev_avail_eraseblocks)
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ret = sprintf(buf, "%d\n", ubi->avail_pebs);
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else if (attr == &dev_total_eraseblocks)
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ret = sprintf(buf, "%d\n", ubi->good_peb_count);
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else if (attr == &dev_volumes_count)
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ret = sprintf(buf, "%d\n", ubi->vol_count - UBI_INT_VOL_COUNT);
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else if (attr == &dev_max_ec)
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ret = sprintf(buf, "%d\n", ubi->max_ec);
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else if (attr == &dev_reserved_for_bad)
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ret = sprintf(buf, "%d\n", ubi->beb_rsvd_pebs);
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else if (attr == &dev_bad_peb_count)
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ret = sprintf(buf, "%d\n", ubi->bad_peb_count);
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else if (attr == &dev_max_vol_count)
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ret = sprintf(buf, "%d\n", ubi->vtbl_slots);
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else if (attr == &dev_min_io_size)
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ret = sprintf(buf, "%d\n", ubi->min_io_size);
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else if (attr == &dev_bgt_enabled)
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ret = sprintf(buf, "%d\n", ubi->thread_enabled);
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else if (attr == &dev_mtd_num)
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ret = sprintf(buf, "%d\n", ubi->mtd->index);
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else
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ret = -EINVAL;
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ubi_put_device(ubi);
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return ret;
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}
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static struct attribute *ubi_dev_attrs[] = {
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&dev_eraseblock_size.attr,
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&dev_avail_eraseblocks.attr,
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&dev_total_eraseblocks.attr,
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&dev_volumes_count.attr,
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&dev_max_ec.attr,
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&dev_reserved_for_bad.attr,
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&dev_bad_peb_count.attr,
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&dev_max_vol_count.attr,
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&dev_min_io_size.attr,
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&dev_bgt_enabled.attr,
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&dev_mtd_num.attr,
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NULL
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};
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ATTRIBUTE_GROUPS(ubi_dev);
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static void dev_release(struct device *dev)
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{
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struct ubi_device *ubi = container_of(dev, struct ubi_device, dev);
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kfree(ubi);
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}
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/**
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* ubi_sysfs_init - initialize sysfs for an UBI device.
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* @ubi: UBI device description object
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* @ref: set to %1 on exit in case of failure if a reference to @ubi->dev was
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* taken
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*
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* This function returns zero in case of success and a negative error code in
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* case of failure.
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*/
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static int ubi_sysfs_init(struct ubi_device *ubi, int *ref)
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{
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int err;
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ubi->dev.release = dev_release;
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ubi->dev.devt = ubi->cdev.dev;
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ubi->dev.class = &ubi_class;
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ubi->dev.groups = ubi_dev_groups;
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dev_set_name(&ubi->dev, UBI_NAME_STR"%d", ubi->ubi_num);
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err = device_register(&ubi->dev);
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if (err)
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return err;
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*ref = 1;
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return 0;
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}
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/**
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* ubi_sysfs_close - close sysfs for an UBI device.
|
|
* @ubi: UBI device description object
|
|
*/
|
|
static void ubi_sysfs_close(struct ubi_device *ubi)
|
|
{
|
|
device_unregister(&ubi->dev);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* kill_volumes - destroy all user volumes.
|
|
* @ubi: UBI device description object
|
|
*/
|
|
static void kill_volumes(struct ubi_device *ubi)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ubi->vtbl_slots; i++)
|
|
if (ubi->volumes[i])
|
|
ubi_free_volume(ubi, ubi->volumes[i]);
|
|
}
|
|
|
|
/**
|
|
* 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, int *ref)
|
|
{
|
|
int i, err;
|
|
#ifndef __UBOOT__
|
|
dev_t dev;
|
|
#endif
|
|
|
|
*ref = 0;
|
|
sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num);
|
|
|
|
/*
|
|
* Major numbers for the UBI character devices are allocated
|
|
* dynamically. Major numbers of volume character devices are
|
|
* equivalent to ones of the corresponding UBI character device. Minor
|
|
* numbers of UBI character devices are 0, while minor numbers of
|
|
* volume character devices start from 1. Thus, we allocate one major
|
|
* number and ubi->vtbl_slots + 1 minor numbers.
|
|
*/
|
|
err = alloc_chrdev_region(&dev, 0, ubi->vtbl_slots + 1, ubi->ubi_name);
|
|
if (err) {
|
|
ubi_err(ubi, "cannot register UBI character devices");
|
|
return err;
|
|
}
|
|
|
|
ubi_assert(MINOR(dev) == 0);
|
|
cdev_init(&ubi->cdev, &ubi_cdev_operations);
|
|
dbg_gen("%s major is %u", ubi->ubi_name, MAJOR(dev));
|
|
ubi->cdev.owner = THIS_MODULE;
|
|
|
|
err = cdev_add(&ubi->cdev, dev, 1);
|
|
if (err) {
|
|
ubi_err(ubi, "cannot add character device");
|
|
goto out_unreg;
|
|
}
|
|
|
|
err = ubi_sysfs_init(ubi, ref);
|
|
if (err)
|
|
goto out_sysfs;
|
|
|
|
for (i = 0; i < ubi->vtbl_slots; i++)
|
|
if (ubi->volumes[i]) {
|
|
err = ubi_add_volume(ubi, ubi->volumes[i]);
|
|
if (err) {
|
|
ubi_err(ubi, "cannot add volume %d", i);
|
|
goto out_volumes;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_volumes:
|
|
kill_volumes(ubi);
|
|
out_sysfs:
|
|
if (*ref)
|
|
get_device(&ubi->dev);
|
|
ubi_sysfs_close(ubi);
|
|
cdev_del(&ubi->cdev);
|
|
out_unreg:
|
|
unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
|
|
ubi_err(ubi, "cannot initialize UBI %s, error %d",
|
|
ubi->ubi_name, err);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
kill_volumes(ubi);
|
|
ubi_sysfs_close(ubi);
|
|
cdev_del(&ubi->cdev);
|
|
unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
|
|
}
|
|
|
|
/**
|
|
* ubi_free_internal_volumes - free internal volumes.
|
|
* @ubi: UBI device description object
|
|
*/
|
|
void ubi_free_internal_volumes(struct ubi_device *ubi)
|
|
{
|
|
int i;
|
|
|
|
for (i = ubi->vtbl_slots;
|
|
i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
|
|
kfree(ubi->volumes[i]->eba_tbl);
|
|
kfree(ubi->volumes[i]);
|
|
}
|
|
}
|
|
|
|
static int get_bad_peb_limit(const struct ubi_device *ubi, int max_beb_per1024)
|
|
{
|
|
int limit, device_pebs;
|
|
uint64_t device_size;
|
|
|
|
if (!max_beb_per1024)
|
|
return 0;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/* Round it up */
|
|
if (mult_frac(limit, 1024, max_beb_per1024) < device_pebs)
|
|
limit += 1;
|
|
|
|
return limit;
|
|
}
|
|
|
|
/**
|
|
* 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:
|
|
* o EC header is always at offset zero - this cannot be changed;
|
|
* o VID header starts just after the EC header at the closest address
|
|
* aligned to @io->hdrs_min_io_size;
|
|
* o data starts just after the VID header at the closest address aligned to
|
|
* @io->min_io_size
|
|
*
|
|
* 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, 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
|
|
* may have different eraseblock size and other
|
|
* characteristics. It looks like mostly multi-region flashes
|
|
* have one "main" region and one or more small regions to
|
|
* store boot loader code or boot parameters or whatever. I
|
|
* guess we should just pick the largest region. But this is
|
|
* not implemented.
|
|
*/
|
|
ubi_err(ubi, "multiple regions, not implemented");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ubi->vid_hdr_offset < 0)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Note, in this implementation we support MTD devices with 0x7FFFFFFF
|
|
* physical eraseblocks maximum.
|
|
*/
|
|
|
|
ubi->peb_size = ubi->mtd->erasesize;
|
|
ubi->peb_count = mtd_div_by_eb(ubi->mtd->size, ubi->mtd);
|
|
ubi->flash_size = ubi->mtd->size;
|
|
|
|
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;
|
|
|
|
/*
|
|
* Make sure minimal I/O unit is power of 2. Note, there is no
|
|
* fundamental reason for this assumption. It is just an optimization
|
|
* which allows us to avoid costly division operations.
|
|
*/
|
|
if (!is_power_of_2(ubi->min_io_size)) {
|
|
ubi_err(ubi, "min. I/O unit (%d) is not power of 2",
|
|
ubi->min_io_size);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ubi_assert(ubi->hdrs_min_io_size > 0);
|
|
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(ubi, "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_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 */
|
|
ubi->vid_hdr_offset = ubi->vid_hdr_aloffset =
|
|
ubi->ec_hdr_alsize;
|
|
else {
|
|
ubi->vid_hdr_aloffset = ubi->vid_hdr_offset &
|
|
~(ubi->hdrs_min_io_size - 1);
|
|
ubi->vid_hdr_shift = ubi->vid_hdr_offset -
|
|
ubi->vid_hdr_aloffset;
|
|
}
|
|
|
|
/* Similar for the data offset */
|
|
ubi->leb_start = ubi->vid_hdr_offset + UBI_VID_HDR_SIZE;
|
|
ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size);
|
|
|
|
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) {
|
|
ubi_err(ubi, "unaligned VID header shift %d",
|
|
ubi->vid_hdr_shift);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Check sanity */
|
|
if (ubi->vid_hdr_offset < UBI_EC_HDR_SIZE ||
|
|
ubi->leb_start < ubi->vid_hdr_offset + UBI_VID_HDR_SIZE ||
|
|
ubi->leb_start > ubi->peb_size - UBI_VID_HDR_SIZE ||
|
|
ubi->leb_start & (ubi->min_io_size - 1)) {
|
|
ubi_err(ubi, "bad VID header (%d) or data offsets (%d)",
|
|
ubi->vid_hdr_offset, ubi->leb_start);
|
|
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(ubi, "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(ubi, "MTD device %d is write-protected, attach in read-only mode",
|
|
ubi->mtd->index);
|
|
ubi->ro_mode = 1;
|
|
}
|
|
|
|
/*
|
|
* 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 leave @ubi->bad_peb_count
|
|
* uninitialized so far.
|
|
*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* autoresize - re-size the volume which has the "auto-resize" flag set.
|
|
* @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
|
|
* 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.
|
|
*/
|
|
static int autoresize(struct ubi_device *ubi, int vol_id)
|
|
{
|
|
struct ubi_volume_desc desc;
|
|
struct ubi_volume *vol = ubi->volumes[vol_id];
|
|
int err, old_reserved_pebs = vol->reserved_pebs;
|
|
|
|
if (ubi->ro_mode) {
|
|
ubi_warn(ubi, "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 propagate this change
|
|
* to the flash.
|
|
*/
|
|
ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG;
|
|
|
|
if (ubi->avail_pebs == 0) {
|
|
struct ubi_vtbl_record vtbl_rec;
|
|
|
|
/*
|
|
* No available PEBs to re-size the volume, clear the flag on
|
|
* flash and exit.
|
|
*/
|
|
vtbl_rec = ubi->vtbl[vol_id];
|
|
err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
|
|
if (err)
|
|
ubi_err(ubi, "cannot clean auto-resize flag for volume %d",
|
|
vol_id);
|
|
} else {
|
|
desc.vol = vol;
|
|
err = ubi_resize_volume(&desc,
|
|
old_reserved_pebs + ubi->avail_pebs);
|
|
if (err)
|
|
ubi_err(ubi, "cannot auto-resize volume %d",
|
|
vol_id);
|
|
}
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
ubi_msg(ubi, "volume %d (\"%s\") re-sized from %d to %d LEBs",
|
|
vol_id, vol->name, old_reserved_pebs, vol->reserved_pebs);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ubi_attach_mtd_dev - attach an MTD device.
|
|
* @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 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 max_beb_per1024)
|
|
{
|
|
struct ubi_device *ubi;
|
|
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.
|
|
*
|
|
* Note, this function assumes that UBI devices creations and deletions
|
|
* are serialized, so it does not take the &ubi_devices_lock.
|
|
*/
|
|
for (i = 0; i < UBI_MAX_DEVICES; i++) {
|
|
ubi = ubi_devices[i];
|
|
if (ubi && mtd->index == ubi->mtd->index) {
|
|
ubi_err(ubi, "mtd%d is already attached to ubi%d",
|
|
mtd->index, i);
|
|
return -EEXIST;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make sure this MTD device is not emulated on top of an UBI volume
|
|
* already. Well, generally this recursion works fine, but there are
|
|
* different problems like the UBI module takes a reference to itself
|
|
* by attaching (and thus, opening) the emulated MTD device. This
|
|
* results in inability to unload the module. And in general it makes
|
|
* no sense to attach emulated MTD devices, so we prohibit this.
|
|
*/
|
|
if (mtd->type == MTD_UBIVOLUME) {
|
|
ubi_err(ubi, "refuse attaching mtd%d - it is already emulated on top of UBI",
|
|
mtd->index);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ubi_num == UBI_DEV_NUM_AUTO) {
|
|
/* Search for an empty slot in the @ubi_devices array */
|
|
for (ubi_num = 0; ubi_num < UBI_MAX_DEVICES; ubi_num++)
|
|
if (!ubi_devices[ubi_num])
|
|
break;
|
|
if (ubi_num == UBI_MAX_DEVICES) {
|
|
ubi_err(ubi, "only %d UBI devices may be created",
|
|
UBI_MAX_DEVICES);
|
|
return -ENFILE;
|
|
}
|
|
} else {
|
|
if (ubi_num >= UBI_MAX_DEVICES)
|
|
return -EINVAL;
|
|
|
|
/* Make sure ubi_num is not busy */
|
|
if (ubi_devices[ubi_num]) {
|
|
ubi_err(ubi, "already exists");
|
|
return -EEXIST;
|
|
}
|
|
}
|
|
|
|
ubi = kzalloc(sizeof(struct ubi_device), GFP_KERNEL);
|
|
if (!ubi)
|
|
return -ENOMEM;
|
|
|
|
ubi->mtd = mtd;
|
|
ubi->ubi_num = ubi_num;
|
|
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);
|
|
ubi->fm_pool.max_size = max(ubi->fm_pool.max_size,
|
|
UBI_FM_MIN_POOL_SIZE);
|
|
|
|
ubi->fm_wl_pool.max_size = ubi->fm_pool.max_size / 2;
|
|
ubi->fm_disabled = !fm_autoconvert;
|
|
if (fm_debug)
|
|
ubi_enable_dbg_chk_fastmap(ubi);
|
|
|
|
if (!ubi->fm_disabled && (int)mtd_div_by_eb(ubi->mtd->size, ubi->mtd)
|
|
<= UBI_FM_MAX_START) {
|
|
ubi_err(ubi, "More than %i PEBs are needed for fastmap, sorry.",
|
|
UBI_FM_MAX_START);
|
|
ubi->fm_disabled = 1;
|
|
}
|
|
|
|
ubi_msg(ubi, "default fastmap pool size: %d", ubi->fm_pool.max_size);
|
|
ubi_msg(ubi, "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->device_mutex);
|
|
spin_lock_init(&ubi->volumes_lock);
|
|
init_rwsem(&ubi->fm_protect);
|
|
init_rwsem(&ubi->fm_eba_sem);
|
|
|
|
ubi_msg(ubi, "attaching mtd%d", mtd->index);
|
|
|
|
err = io_init(ubi, max_beb_per1024);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
err = -ENOMEM;
|
|
ubi->peb_buf = vmalloc(ubi->peb_size);
|
|
if (!ubi->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 = ubi_attach(ubi, 0);
|
|
if (err) {
|
|
ubi_err(ubi, "failed to attach mtd%d, error %d",
|
|
mtd->index, err);
|
|
goto out_free;
|
|
}
|
|
|
|
if (ubi->autoresize_vol_id != -1) {
|
|
err = autoresize(ubi, ubi->autoresize_vol_id);
|
|
if (err)
|
|
goto out_detach;
|
|
}
|
|
|
|
err = uif_init(ubi, &ref);
|
|
if (err)
|
|
goto out_detach;
|
|
|
|
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(ubi, "cannot spawn \"%s\", error %d",
|
|
ubi->bgt_name, err);
|
|
goto out_debugfs;
|
|
}
|
|
|
|
ubi_msg(ubi, "attached mtd%d (name \"%s\", size %llu MiB)",
|
|
mtd->index, mtd->name, ubi->flash_size >> 20);
|
|
ubi_msg(ubi, "PEB size: %d bytes (%d KiB), LEB size: %d bytes",
|
|
ubi->peb_size, ubi->peb_size >> 10, ubi->leb_size);
|
|
ubi_msg(ubi, "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(ubi, "VID header offset: %d (aligned %d), data offset: %d",
|
|
ubi->vid_hdr_offset, ubi->vid_hdr_aloffset, ubi->leb_start);
|
|
ubi_msg(ubi, "good PEBs: %d, bad PEBs: %d, corrupted PEBs: %d",
|
|
ubi->good_peb_count, ubi->bad_peb_count, ubi->corr_peb_count);
|
|
ubi_msg(ubi, "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(ubi, "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(ubi, "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;
|
|
#ifndef __UBOOT__
|
|
wake_up_process(ubi->bgt_thread);
|
|
#else
|
|
ubi_do_worker(ubi);
|
|
#endif
|
|
|
|
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_wl_close(ubi);
|
|
ubi_free_internal_volumes(ubi);
|
|
vfree(ubi->vtbl);
|
|
out_free:
|
|
vfree(ubi->peb_buf);
|
|
vfree(ubi->fm_buf);
|
|
if (ref)
|
|
put_device(&ubi->dev);
|
|
else
|
|
kfree(ubi);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubi_detach_mtd_dev - detach an MTD device.
|
|
* @ubi_num: UBI device number to detach from
|
|
* @anyway: detach MTD even if device reference count is not zero
|
|
*
|
|
* This function destroys an UBI device number @ubi_num and detaches the
|
|
* underlying MTD device. Returns zero in case of success and %-EBUSY if the
|
|
* UBI device is busy and cannot be destroyed, and %-EINVAL if it does not
|
|
* exist.
|
|
*
|
|
* Note, the invocations of this function has to be serialized by the
|
|
* @ubi_devices_mutex.
|
|
*/
|
|
int ubi_detach_mtd_dev(int ubi_num, int anyway)
|
|
{
|
|
struct ubi_device *ubi;
|
|
|
|
if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES)
|
|
return -EINVAL;
|
|
|
|
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);
|
|
return -EBUSY;
|
|
}
|
|
/* This may only happen if there is a bug */
|
|
ubi_err(ubi, "%s reference count %d, destroy anyway",
|
|
ubi->ubi_name, ubi->ref_count);
|
|
}
|
|
ubi_devices[ubi_num] = NULL;
|
|
spin_unlock(&ubi_devices_lock);
|
|
|
|
ubi_assert(ubi_num == ubi->ubi_num);
|
|
ubi_notify_all(ubi, UBI_VOLUME_REMOVED, NULL);
|
|
ubi_msg(ubi, "detaching mtd%d", ubi->mtd->index);
|
|
#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.
|
|
* In case of fastmap debugging we omit the update to simulate an
|
|
* unclean shutdown. */
|
|
if (!ubi_dbg_chk_fastmap(ubi))
|
|
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_wl_close(ubi);
|
|
ubi_free_internal_volumes(ubi);
|
|
vfree(ubi->vtbl);
|
|
put_mtd_device(ubi->mtd);
|
|
vfree(ubi->peb_buf);
|
|
vfree(ubi->fm_buf);
|
|
ubi_msg(ubi, "mtd%d is detached", ubi->mtd->index);
|
|
put_device(&ubi->dev);
|
|
return 0;
|
|
}
|
|
|
|
#ifndef __UBOOT__
|
|
/**
|
|
* 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(d_backing_inode(path.dentry));
|
|
minor = iminor(d_backing_inode(path.dentry));
|
|
mode = d_backing_inode(path.dentry)->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 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)
|
|
{
|
|
struct mtd_info *mtd;
|
|
int mtd_num;
|
|
char *endp;
|
|
|
|
mtd_num = simple_strtoul(mtd_dev, &endp, 0);
|
|
if (*endp != '\0' || mtd_dev == endp) {
|
|
/*
|
|
* This does not look like an ASCII integer, probably this is
|
|
* 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;
|
|
}
|
|
|
|
#ifndef __UBOOT__
|
|
static int __init ubi_init(void)
|
|
#else
|
|
int ubi_init(void)
|
|
#endif
|
|
{
|
|
int err, i, k;
|
|
|
|
/* Ensure that EC and VID headers have correct size */
|
|
BUILD_BUG_ON(sizeof(struct ubi_ec_hdr) != 64);
|
|
BUILD_BUG_ON(sizeof(struct ubi_vid_hdr) != 64);
|
|
|
|
if (mtd_devs > UBI_MAX_DEVICES) {
|
|
pr_err("UBI error: too many MTD devices, maximum is %d\n",
|
|
UBI_MAX_DEVICES);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Create base sysfs directory and sysfs files */
|
|
err = class_register(&ubi_class);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = misc_register(&ubi_ctrl_cdev);
|
|
if (err) {
|
|
pr_err("UBI error: cannot register device\n");
|
|
goto out;
|
|
}
|
|
|
|
ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab",
|
|
sizeof(struct ubi_wl_entry),
|
|
0, 0, NULL);
|
|
if (!ubi_wl_entry_slab) {
|
|
err = -ENOMEM;
|
|
goto out_dev_unreg;
|
|
}
|
|
|
|
err = ubi_debugfs_init();
|
|
if (err)
|
|
goto out_slab;
|
|
|
|
|
|
/* Attach MTD devices */
|
|
for (i = 0; i < mtd_devs; i++) {
|
|
struct mtd_dev_param *p = &mtd_dev_param[i];
|
|
struct mtd_info *mtd;
|
|
|
|
cond_resched();
|
|
|
|
mtd = open_mtd_device(p->name);
|
|
if (IS_ERR(mtd)) {
|
|
err = PTR_ERR(mtd);
|
|
pr_err("UBI error: cannot open mtd %s, error %d\n",
|
|
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, p->ubi_num,
|
|
p->vid_hdr_offs, p->max_beb_per1024);
|
|
mutex_unlock(&ubi_devices_mutex);
|
|
if (err < 0) {
|
|
pr_err("UBI error: cannot attach mtd%d\n",
|
|
mtd->index);
|
|
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) {
|
|
pr_err("UBI error: block: cannot initialize, error %d\n", err);
|
|
|
|
/* See comment above re-ubi_is_module(). */
|
|
if (ubi_is_module())
|
|
goto out_detach;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_detach:
|
|
for (k = 0; k < i; k++)
|
|
if (ubi_devices[k]) {
|
|
mutex_lock(&ubi_devices_mutex);
|
|
ubi_detach_mtd_dev(ubi_devices[k]->ubi_num, 1);
|
|
mutex_unlock(&ubi_devices_mutex);
|
|
}
|
|
ubi_debugfs_exit();
|
|
out_slab:
|
|
kmem_cache_destroy(ubi_wl_entry_slab);
|
|
out_dev_unreg:
|
|
misc_deregister(&ubi_ctrl_cdev);
|
|
out:
|
|
#ifdef __UBOOT__
|
|
/* Reset any globals that the driver depends on being zeroed */
|
|
mtd_devs = 0;
|
|
#endif
|
|
class_unregister(&ubi_class);
|
|
pr_err("UBI error: cannot initialize UBI, error %d\n", err);
|
|
return err;
|
|
}
|
|
late_initcall(ubi_init);
|
|
|
|
#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_unregister(&ubi_class);
|
|
#ifdef __UBOOT__
|
|
/* Reset any globals that the driver depends on being zeroed */
|
|
mtd_devs = 0;
|
|
#endif
|
|
}
|
|
module_exit(ubi_exit);
|
|
|
|
/**
|
|
* 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
|
|
* negative error code in case of failure.
|
|
*/
|
|
static int __init bytes_str_to_int(const char *str)
|
|
{
|
|
char *endp;
|
|
unsigned long result;
|
|
|
|
result = simple_strtoul(str, &endp, 0);
|
|
if (str == endp || result >= INT_MAX) {
|
|
pr_err("UBI error: incorrect bytes count: \"%s\"\n", str);
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (*endp) {
|
|
case 'G':
|
|
result *= 1024;
|
|
case 'M':
|
|
result *= 1024;
|
|
case 'K':
|
|
result *= 1024;
|
|
if (endp[1] == 'i' && endp[2] == 'B')
|
|
endp += 2;
|
|
case '\0':
|
|
break;
|
|
default:
|
|
pr_err("UBI error: 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
|
|
* @kp: not used
|
|
*
|
|
* This function returns zero in case of success and a negative error code in
|
|
* case of error.
|
|
*/
|
|
#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[MTD_PARAM_MAX_COUNT], *token;
|
|
|
|
if (!val)
|
|
return -EINVAL;
|
|
|
|
if (mtd_devs == UBI_MAX_DEVICES) {
|
|
pr_err("UBI error: 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) {
|
|
pr_err("UBI error: parameter \"%s\" is too long, max. is %d\n",
|
|
val, MTD_PARAM_LEN_MAX);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (len == 0) {
|
|
pr_warn("UBI warning: empty 'mtd=' parameter - ignored\n");
|
|
return 0;
|
|
}
|
|
|
|
strcpy(buf, val);
|
|
|
|
/* Get rid of the final newline */
|
|
if (buf[len - 1] == '\n')
|
|
buf[len - 1] = '\0';
|
|
|
|
for (i = 0; i < MTD_PARAM_MAX_COUNT; i++)
|
|
tokens[i] = strsep(&pbuf, ",");
|
|
|
|
if (pbuf) {
|
|
pr_err("UBI error: too many arguments at \"%s\"\n", val);
|
|
return -EINVAL;
|
|
}
|
|
|
|
p = &mtd_dev_param[mtd_devs];
|
|
strcpy(&p->name[0], tokens[0]);
|
|
|
|
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) {
|
|
pr_err("UBI error: bad value for max_beb_per1024 parameter: %s",
|
|
token);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
token = tokens[3];
|
|
if (token) {
|
|
int err = kstrtoint(token, 10, &p->ubi_num);
|
|
|
|
if (err) {
|
|
pr_err("UBI error: 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|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, 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.");
|
|
module_param(fm_debug, bool, 0);
|
|
MODULE_PARM_DESC(fm_debug, "Set this parameter to enable fastmap debugging by default. Warning, this will make fastmap slow!");
|
|
#endif
|
|
MODULE_VERSION(__stringify(UBI_VERSION));
|
|
MODULE_DESCRIPTION("UBI - Unsorted Block Images");
|
|
MODULE_AUTHOR("Artem Bityutskiy");
|
|
MODULE_LICENSE("GPL");
|