31edb3f16d
Freeing the fastmap is now done by ubi_fastmap_close() from kernel. No need to keep the barebox own fastmap free function. Signed-off-by: Teresa Remmet <t.remmet@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
740 lines
22 KiB
C
740 lines
22 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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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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#include <linux/err.h>
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#include <linux/stringify.h>
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#include <linux/stat.h>
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#include <linux/log2.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 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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/**
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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 vid_hdr_offs;
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int max_beb_per1024;
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};
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/* MTD devices specification parameters */
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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 = 1;
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#endif
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/* All UBI devices in system */
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struct ubi_device *ubi_devices[UBI_MAX_DEVICES];
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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 = 0;
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#ifdef CONFIG_MTD_UBI_FASTMAP
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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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#endif
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return ret;
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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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ubi = ubi_devices[ubi_num];
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if (!ubi)
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return NULL;
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ubi->ref_count++;
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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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ubi->ref_count--;
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}
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/**
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* kill_volumes - destroy all user volumes.
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* @ubi: UBI device description object
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*/
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static void kill_volumes(struct ubi_device *ubi)
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{
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int i;
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for (i = 0; i < ubi->vtbl_slots; i++)
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if (ubi->volumes[i])
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ubi_free_volume(ubi, ubi->volumes[i]);
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}
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/**
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* uif_init - initialize user interfaces 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, otherwise set to %0
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*
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* This function initializes various user interfaces for an UBI device. If the
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* initialization fails at an early stage, this function frees all the
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* resources it allocated, returns an error, and @ref is set to %0. However,
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* if the initialization fails after the UBI device was registered in the
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* driver core subsystem, this function takes a reference to @ubi->dev, because
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* otherwise the release function ('dev_release()') would free whole @ubi
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* object. The @ref argument is set to %1 in this case. The caller has to put
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* this reference.
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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 uif_init(struct ubi_device *ubi, int *ref)
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{
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int i, err;
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*ref = 0;
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sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num);
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sprintf(ubi->dev.name, "%s.ubi", ubi->mtd->cdev.name);
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ubi->dev.id = DEVICE_ID_SINGLE;
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ubi->dev.parent = &ubi->mtd->class_dev;
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err = register_device(&ubi->dev);
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if (err)
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goto out_unreg;
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err = ubi_cdev_add(ubi);
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if (err) {
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ubi_err(ubi, "cannot add character device");
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goto out_dev;
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}
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for (i = 0; i < ubi->vtbl_slots; i++)
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if (ubi->volumes[i]) {
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err = ubi_add_volume(ubi, ubi->volumes[i]);
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if (err) {
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ubi_err(ubi, "cannot add volume %d", i);
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goto out_volumes;
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}
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}
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return 0;
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out_volumes:
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kill_volumes(ubi);
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devfs_remove(&ubi->cdev);
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out_dev:
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unregister_device(&ubi->dev);
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out_unreg:
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ubi_err(ubi, "cannot initialize UBI %s, error %d",
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ubi->ubi_name, err);
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return err;
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}
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/**
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* uif_close - close user interfaces for an UBI device.
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* @ubi: UBI device description object
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*
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* Note, since this function un-registers UBI volume device objects (@vol->dev),
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* the memory allocated voe the volumes is freed as well (in the release
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* function).
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*/
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static void uif_close(struct ubi_device *ubi)
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{
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kill_volumes(ubi);
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unregister_device(&ubi->dev);
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ubi_cdev_remove(ubi);
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}
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/**
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* ubi_free_internal_volumes - free internal volumes.
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* @ubi: UBI device description object
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*/
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void ubi_free_internal_volumes(struct ubi_device *ubi)
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{
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int i;
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for (i = ubi->vtbl_slots;
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i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
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kfree(ubi->volumes[i]->eba_tbl);
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kfree(ubi->volumes[i]);
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}
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}
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static int get_bad_peb_limit(const struct ubi_device *ubi, int max_beb_per1024)
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{
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int limit, device_pebs;
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uint64_t device_size;
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if (!max_beb_per1024)
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return 0;
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/*
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* Here we are using size of the entire flash chip and
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* not just the MTD partition size because the maximum
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* number of bad eraseblocks is a percentage of the
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* whole device and bad eraseblocks are not fairly
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* distributed over the flash chip. So the worst case
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* is that all the bad eraseblocks of the chip are in
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* the MTD partition we are attaching (ubi->mtd).
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*/
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if (ubi->mtd->master)
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device_size = ubi->mtd->master->size;
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else
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device_size = ubi->mtd->size;
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device_pebs = mtd_div_by_eb(device_size, ubi->mtd);
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limit = mult_frac(device_pebs, max_beb_per1024, 1024);
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/* Round it up */
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if (mult_frac(limit, 1024, max_beb_per1024) < device_pebs)
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limit += 1;
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return limit;
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}
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/**
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* io_init - initialize I/O sub-system for a given UBI device.
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* @ubi: UBI device description object
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* @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
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*
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* If @ubi->vid_hdr_offset or @ubi->leb_start is zero, default offsets are
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* assumed:
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* o EC header is always at offset zero - this cannot be changed;
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* o VID header starts just after the EC header at the closest address
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* aligned to @io->hdrs_min_io_size;
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* o data starts just after the VID header at the closest address aligned to
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* @io->min_io_size
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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 io_init(struct ubi_device *ubi, int max_beb_per1024)
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{
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dbg_gen("sizeof(struct ubi_ainf_peb) %zu", sizeof(struct ubi_ainf_peb));
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dbg_gen("sizeof(struct ubi_wl_entry) %zu", sizeof(struct ubi_wl_entry));
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if (ubi->mtd->numeraseregions != 0) {
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/*
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* Some flashes have several erase regions. Different regions
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* may have different eraseblock size and other
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* characteristics. It looks like mostly multi-region flashes
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* have one "main" region and one or more small regions to
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* store boot loader code or boot parameters or whatever. I
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* guess we should just pick the largest region. But this is
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* not implemented.
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*/
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ubi_err(ubi, "multiple regions, not implemented");
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return -EINVAL;
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}
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if (ubi->vid_hdr_offset < 0)
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return -EINVAL;
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/*
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* Note, in this implementation we support MTD devices with 0x7FFFFFFF
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* physical eraseblocks maximum.
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*/
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ubi->peb_size = ubi->mtd->erasesize;
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ubi->peb_count = mtd_div_by_eb(ubi->mtd->size, ubi->mtd);
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ubi->flash_size = ubi->mtd->size;
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if (mtd_can_have_bb(ubi->mtd)) {
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ubi->bad_allowed = 1;
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ubi->bad_peb_limit = get_bad_peb_limit(ubi, max_beb_per1024);
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}
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if (ubi->mtd->type == MTD_NORFLASH) {
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ubi_assert(ubi->mtd->writesize == 1);
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ubi->nor_flash = 1;
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}
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ubi->min_io_size = ubi->mtd->writesize;
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ubi->hdrs_min_io_size = ubi->mtd->writesize >> ubi->mtd->subpage_sft;
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/*
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* Make sure minimal I/O unit is power of 2. Note, there is no
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* fundamental reason for this assumption. It is just an optimization
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* which allows us to avoid costly division operations.
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*/
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if (!is_power_of_2(ubi->min_io_size)) {
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ubi_err(ubi, "min. I/O unit (%d) is not power of 2",
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ubi->min_io_size);
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return -EINVAL;
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}
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ubi_assert(ubi->hdrs_min_io_size > 0);
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ubi_assert(ubi->hdrs_min_io_size <= ubi->min_io_size);
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ubi_assert(ubi->min_io_size % ubi->hdrs_min_io_size == 0);
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ubi->max_write_size = ubi->mtd->writebufsize;
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/*
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* Maximum write size has to be greater or equivalent to min. I/O
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* size, and be multiple of min. I/O size.
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*/
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if (ubi->max_write_size < ubi->min_io_size ||
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ubi->max_write_size % ubi->min_io_size ||
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!is_power_of_2(ubi->max_write_size)) {
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ubi_err(ubi, "bad write buffer size %d for %d min. I/O unit",
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ubi->max_write_size, ubi->min_io_size);
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return -EINVAL;
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}
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/* Calculate default aligned sizes of EC and VID headers */
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ubi->ec_hdr_alsize = ALIGN(UBI_EC_HDR_SIZE, ubi->hdrs_min_io_size);
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ubi->vid_hdr_alsize = ALIGN(UBI_VID_HDR_SIZE, ubi->hdrs_min_io_size);
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dbg_gen("min_io_size %d", ubi->min_io_size);
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dbg_gen("max_write_size %d", ubi->max_write_size);
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dbg_gen("hdrs_min_io_size %d", ubi->hdrs_min_io_size);
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dbg_gen("ec_hdr_alsize %d", ubi->ec_hdr_alsize);
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dbg_gen("vid_hdr_alsize %d", ubi->vid_hdr_alsize);
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if (ubi->vid_hdr_offset == 0)
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/* Default offset */
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ubi->vid_hdr_offset = ubi->vid_hdr_aloffset =
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ubi->ec_hdr_alsize;
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else {
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ubi->vid_hdr_aloffset = ubi->vid_hdr_offset &
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~(ubi->hdrs_min_io_size - 1);
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ubi->vid_hdr_shift = ubi->vid_hdr_offset -
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ubi->vid_hdr_aloffset;
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}
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/* Similar for the data offset */
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ubi->leb_start = ubi->vid_hdr_offset + UBI_VID_HDR_SIZE;
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ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size);
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dbg_gen("vid_hdr_offset %d", ubi->vid_hdr_offset);
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dbg_gen("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset);
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dbg_gen("vid_hdr_shift %d", ubi->vid_hdr_shift);
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dbg_gen("leb_start %d", ubi->leb_start);
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/* The shift must be aligned to 32-bit boundary */
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if (ubi->vid_hdr_shift % 4) {
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ubi_err(ubi, "unaligned VID header shift %d",
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ubi->vid_hdr_shift);
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return -EINVAL;
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}
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/* Check sanity */
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if (ubi->vid_hdr_offset < UBI_EC_HDR_SIZE ||
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ubi->leb_start < ubi->vid_hdr_offset + UBI_VID_HDR_SIZE ||
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ubi->leb_start > ubi->peb_size - UBI_VID_HDR_SIZE ||
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ubi->leb_start & (ubi->min_io_size - 1)) {
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ubi_err(ubi, "bad VID header (%d) or data offsets (%d)",
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ubi->vid_hdr_offset, ubi->leb_start);
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return -EINVAL;
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}
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/*
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* Set maximum amount of physical erroneous eraseblocks to be 10%.
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* Erroneous PEB are those which have read errors.
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*/
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ubi->max_erroneous = ubi->peb_count / 10;
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if (ubi->max_erroneous < 16)
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ubi->max_erroneous = 16;
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dbg_gen("max_erroneous %d", ubi->max_erroneous);
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/*
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* It may happen that EC and VID headers are situated in one minimal
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* I/O unit. In this case we can only accept this UBI image in
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* read-only mode.
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*/
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if (ubi->vid_hdr_offset + UBI_VID_HDR_SIZE <= ubi->hdrs_min_io_size) {
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ubi_warn(ubi, "EC and VID headers are in the same minimal I/O unit, switch to read-only mode");
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ubi->ro_mode = 1;
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}
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ubi->leb_size = ubi->peb_size - ubi->leb_start;
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if (!(ubi->mtd->flags & MTD_WRITEABLE)) {
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ubi_msg(ubi, "MTD device %d is write-protected, attach in read-only mode",
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ubi->mtd->index);
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ubi->ro_mode = 1;
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}
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/*
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* Note, ideally, we have to initialize @ubi->bad_peb_count here. But
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* unfortunately, MTD does not provide this information. We should loop
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* over all physical eraseblocks and invoke mtd->block_is_bad() for
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* each physical eraseblock. So, we leave @ubi->bad_peb_count
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* uninitialized so far.
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*/
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return 0;
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}
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/**
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* autoresize - re-size the volume which has the "auto-resize" flag set.
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* @ubi: UBI device description object
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* @vol_id: ID of the volume to re-size
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*
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* This function re-sizes the volume marked by the %UBI_VTBL_AUTORESIZE_FLG in
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* the volume table to the largest possible size. See comments in ubi-header.h
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* for more description of the flag. Returns zero in case of success and a
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* negative error code in case of failure.
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*/
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static int autoresize(struct ubi_device *ubi, int vol_id)
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{
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struct ubi_volume_desc desc;
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struct ubi_volume *vol = ubi->volumes[vol_id];
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int err, old_reserved_pebs = vol->reserved_pebs;
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if (ubi->ro_mode) {
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ubi_warn(ubi, "skip auto-resize because of R/O mode");
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return 0;
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}
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/*
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* Clear the auto-resize flag in the volume in-memory copy of the
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* volume table, and 'ubi_resize_volume()' will propagate this change
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* to the flash.
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*/
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ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG;
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if (ubi->avail_pebs == 0) {
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struct ubi_vtbl_record vtbl_rec;
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/*
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* No available PEBs to re-size the volume, clear the flag on
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* flash and exit.
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*/
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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 == ubi->mtd) {
|
|
ubi_debug("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 (!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_debug("default fastmap pool size: %d", ubi->fm_pool.max_size);
|
|
ubi_debug("default fastmap WL pool size: %d", ubi->fm_wl_pool.max_size);
|
|
#else
|
|
ubi->fm_disabled = 1;
|
|
#endif
|
|
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 = kzalloc(ubi->fm_size, GFP_KERNEL);
|
|
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;
|
|
|
|
ubi_msg(ubi, "attached mtd%d (name \"%s\", size %llu MiB) to ubi%d",
|
|
mtd->index, mtd->name, ubi->flash_size >> 20, ubi_num);
|
|
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);
|
|
|
|
dev_add_param_int_ro(&ubi->dev, "peb_size", ubi->peb_size, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "leb_size", ubi->leb_size, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "vid_header_offset", ubi->vid_hdr_offset, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "min_io_size", ubi->min_io_size, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "sub_page_size", ubi->hdrs_min_io_size, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "good_peb_count", ubi->good_peb_count, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "bad_peb_count", ubi->bad_peb_count, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "max_erase_counter", ubi->max_ec, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "mean_erase_counter", ubi->mean_ec, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "available_pebs", ubi->avail_pebs, "%d");
|
|
dev_add_param_int_ro(&ubi->dev, "reserved_pebs", ubi->rsvd_pebs, "%d");
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
ubi->thread_enabled = 1;
|
|
wake_up_process(ubi->bgt_thread);
|
|
|
|
ubi_devices[ubi_num] = ubi;
|
|
|
|
return ubi_num;
|
|
|
|
out_detach:
|
|
ubi_wl_close(ubi);
|
|
ubi_free_internal_volumes(ubi);
|
|
vfree(ubi->vtbl);
|
|
out_free:
|
|
vfree(ubi->peb_buf);
|
|
vfree(ubi->fm_buf);
|
|
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;
|
|
|
|
ubi->ref_count--;
|
|
|
|
if (ubi->ref_count)
|
|
return -EBUSY;
|
|
|
|
ubi_devices[ubi_num] = NULL;
|
|
|
|
ubi_assert(ubi_num == ubi->ubi_num);
|
|
|
|
ubi_msg(ubi, "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
|
|
|
|
uif_close(ubi);
|
|
|
|
ubi_wl_close(ubi);
|
|
ubi_free_internal_volumes(ubi);
|
|
vfree(ubi->vtbl);
|
|
vfree(ubi->peb_buf);
|
|
vfree(ubi->fm_buf);
|
|
ubi_msg(ubi, "mtd%d is detached", ubi->mtd->index);
|
|
kfree(ubi);
|
|
|
|
return 0;
|
|
}
|