2005-04-17 00:20:36 +02:00
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/*
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* Simple MTD partitioning layer
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*
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2010-08-08 21:58:20 +02:00
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* Copyright © 2000 Nicolas Pitre <nico@fluxnic.net>
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* Copyright © 2002 Thomas Gleixner <gleixner@linutronix.de>
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* Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org>
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2005-04-17 00:20:36 +02:00
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*
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2010-08-08 21:58:20 +02:00
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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 the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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2005-04-17 00:20:36 +02:00
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*
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2005-11-07 12:15:26 +01:00
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*/
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2005-04-17 00:20:36 +02:00
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/kmod.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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2010-09-17 12:31:41 +02:00
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#include <linux/err.h>
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2005-04-17 00:20:36 +02:00
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2011-05-23 11:23:42 +02:00
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#include "mtdcore.h"
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2005-04-17 00:20:36 +02:00
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/* Our partition linked list */
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static LIST_HEAD(mtd_partitions);
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2010-09-17 12:31:41 +02:00
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static DEFINE_MUTEX(mtd_partitions_mutex);
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2005-04-17 00:20:36 +02:00
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/* Our partition node structure */
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struct mtd_part {
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struct mtd_info mtd;
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struct mtd_info *master;
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2008-12-10 14:37:21 +01:00
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uint64_t offset;
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2005-04-17 00:20:36 +02:00
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struct list_head list;
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};
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/*
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* Given a pointer to the MTD object in the mtd_part structure, we can retrieve
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* the pointer to that structure with this macro.
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*/
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#define PART(x) ((struct mtd_part *)(x))
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2005-11-07 12:15:26 +01:00
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/*
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2005-04-17 00:20:36 +02:00
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* MTD methods which simply translate the effective address and pass through
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* to the _real_ device.
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*/
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2008-07-18 18:00:33 +02:00
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static int part_read(struct mtd_info *mtd, loff_t from, size_t len,
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size_t *retlen, u_char *buf)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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2009-03-26 23:41:09 +01:00
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struct mtd_ecc_stats stats;
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2006-05-30 00:37:34 +02:00
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int res;
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2009-03-26 23:41:09 +01:00
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stats = part->master->ecc_stats;
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2005-04-17 00:20:36 +02:00
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if (from >= mtd->size)
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len = 0;
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else if (from + len > mtd->size)
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len = mtd->size - from;
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2008-07-18 18:00:33 +02:00
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res = part->master->read(part->master, from + part->offset,
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2006-05-23 17:21:03 +02:00
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len, retlen, buf);
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2006-05-30 00:37:34 +02:00
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if (unlikely(res)) {
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2011-09-21 03:34:25 +02:00
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if (mtd_is_bitflip(res))
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2009-03-26 23:41:09 +01:00
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mtd->ecc_stats.corrected += part->master->ecc_stats.corrected - stats.corrected;
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2011-09-21 03:34:25 +02:00
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if (mtd_is_eccerr(res))
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2009-03-26 23:41:09 +01:00
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mtd->ecc_stats.failed += part->master->ecc_stats.failed - stats.failed;
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2006-05-30 00:37:34 +02:00
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}
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return res;
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2005-04-17 00:20:36 +02:00
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}
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2008-07-18 18:00:33 +02:00
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static int part_point(struct mtd_info *mtd, loff_t from, size_t len,
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size_t *retlen, void **virt, resource_size_t *phys)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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if (from >= mtd->size)
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len = 0;
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else if (from + len > mtd->size)
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len = mtd->size - from;
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2011-12-23 16:00:37 +01:00
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return mtd_point(part->master, from + part->offset, len, retlen,
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virt, phys);
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2005-04-17 00:20:36 +02:00
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}
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2006-05-23 17:21:03 +02:00
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2008-04-30 08:26:49 +02:00
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static void part_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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2008-04-30 08:26:49 +02:00
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part->master->unpoint(part->master, from + part->offset, len);
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2005-04-17 00:20:36 +02:00
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}
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2009-02-12 11:40:00 +01:00
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static unsigned long part_get_unmapped_area(struct mtd_info *mtd,
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unsigned long len,
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unsigned long offset,
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unsigned long flags)
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{
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struct mtd_part *part = PART(mtd);
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offset += part->offset;
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return part->master->get_unmapped_area(part->master, len, offset,
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flags);
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}
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2006-05-29 03:26:58 +02:00
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static int part_read_oob(struct mtd_info *mtd, loff_t from,
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2008-07-18 18:00:33 +02:00
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struct mtd_oob_ops *ops)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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2006-05-30 00:37:34 +02:00
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int res;
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2006-05-29 03:26:58 +02:00
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2005-04-17 00:20:36 +02:00
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if (from >= mtd->size)
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2006-05-29 03:26:58 +02:00
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return -EINVAL;
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2006-11-03 16:20:38 +01:00
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if (ops->datbuf && from + ops->len > mtd->size)
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2006-05-29 03:26:58 +02:00
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return -EINVAL;
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2006-05-30 00:37:34 +02:00
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2011-01-16 16:50:54 +01:00
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/*
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* If OOB is also requested, make sure that we do not read past the end
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* of this partition.
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*/
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if (ops->oobbuf) {
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size_t len, pages;
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2011-08-31 03:45:40 +02:00
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if (ops->mode == MTD_OPS_AUTO_OOB)
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2011-01-16 16:50:54 +01:00
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len = mtd->oobavail;
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else
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len = mtd->oobsize;
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pages = mtd_div_by_ws(mtd->size, mtd);
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pages -= mtd_div_by_ws(from, mtd);
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if (ops->ooboffs + ops->ooblen > pages * len)
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return -EINVAL;
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}
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res = part->master->read_oob(part->master, from + part->offset, ops);
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2006-05-30 00:37:34 +02:00
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if (unlikely(res)) {
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2011-09-21 03:34:25 +02:00
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if (mtd_is_bitflip(res))
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2006-05-30 00:37:34 +02:00
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mtd->ecc_stats.corrected++;
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2011-09-21 03:34:25 +02:00
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if (mtd_is_eccerr(res))
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2006-05-30 00:37:34 +02:00
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mtd->ecc_stats.failed++;
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}
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return res;
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2005-04-17 00:20:36 +02:00
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}
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2008-07-18 18:00:33 +02:00
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static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
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size_t len, size_t *retlen, u_char *buf)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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2008-07-18 18:00:33 +02:00
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return part->master->read_user_prot_reg(part->master, from,
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2005-04-17 00:20:36 +02:00
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len, retlen, buf);
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}
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2008-07-18 18:00:33 +02:00
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static int part_get_user_prot_info(struct mtd_info *mtd,
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struct otp_info *buf, size_t len)
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2005-02-08 18:11:19 +01:00
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{
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struct mtd_part *part = PART(mtd);
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2008-07-18 18:00:33 +02:00
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return part->master->get_user_prot_info(part->master, buf, len);
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2005-02-08 18:11:19 +01:00
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}
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2008-07-18 18:00:33 +02:00
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static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
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size_t len, size_t *retlen, u_char *buf)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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2008-07-18 18:00:33 +02:00
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return part->master->read_fact_prot_reg(part->master, from,
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2005-04-17 00:20:36 +02:00
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len, retlen, buf);
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}
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2008-07-18 18:00:33 +02:00
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static int part_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
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size_t len)
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2005-02-08 18:11:19 +01:00
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{
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struct mtd_part *part = PART(mtd);
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2008-07-18 18:00:33 +02:00
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return part->master->get_fact_prot_info(part->master, buf, len);
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2005-02-08 18:11:19 +01:00
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}
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2008-07-18 18:00:33 +02:00
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static int part_write(struct mtd_info *mtd, loff_t to, size_t len,
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size_t *retlen, const u_char *buf)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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if (!(mtd->flags & MTD_WRITEABLE))
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return -EROFS;
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if (to >= mtd->size)
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len = 0;
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else if (to + len > mtd->size)
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len = mtd->size - to;
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2008-07-18 18:00:33 +02:00
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return part->master->write(part->master, to + part->offset,
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2006-05-23 17:21:03 +02:00
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len, retlen, buf);
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2005-04-17 00:20:36 +02:00
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}
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2008-07-18 18:00:33 +02:00
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static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
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size_t *retlen, const u_char *buf)
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2008-02-06 11:17:15 +01:00
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{
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struct mtd_part *part = PART(mtd);
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if (!(mtd->flags & MTD_WRITEABLE))
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return -EROFS;
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if (to >= mtd->size)
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len = 0;
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else if (to + len > mtd->size)
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len = mtd->size - to;
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2008-07-18 18:00:33 +02:00
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return part->master->panic_write(part->master, to + part->offset,
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2008-02-06 11:17:15 +01:00
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len, retlen, buf);
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}
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2006-05-29 03:26:58 +02:00
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static int part_write_oob(struct mtd_info *mtd, loff_t to,
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2008-07-18 18:00:33 +02:00
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struct mtd_oob_ops *ops)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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2006-05-29 03:26:58 +02:00
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2005-04-17 00:20:36 +02:00
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if (!(mtd->flags & MTD_WRITEABLE))
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return -EROFS;
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2006-05-29 03:26:58 +02:00
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2005-04-17 00:20:36 +02:00
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if (to >= mtd->size)
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2006-05-29 03:26:58 +02:00
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return -EINVAL;
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2006-11-03 16:20:38 +01:00
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if (ops->datbuf && to + ops->len > mtd->size)
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2006-05-29 03:26:58 +02:00
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return -EINVAL;
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return part->master->write_oob(part->master, to + part->offset, ops);
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2005-04-17 00:20:36 +02:00
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}
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2008-07-18 18:00:33 +02:00
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static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from,
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size_t len, size_t *retlen, u_char *buf)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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2008-07-18 18:00:33 +02:00
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return part->master->write_user_prot_reg(part->master, from,
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2005-04-17 00:20:36 +02:00
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len, retlen, buf);
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}
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2008-07-18 18:00:33 +02:00
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static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
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size_t len)
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2005-02-08 18:11:19 +01:00
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{
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struct mtd_part *part = PART(mtd);
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2008-07-18 18:00:33 +02:00
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return part->master->lock_user_prot_reg(part->master, from, len);
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2005-02-08 18:11:19 +01:00
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}
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2008-07-18 18:00:33 +02:00
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static int part_writev(struct mtd_info *mtd, const struct kvec *vecs,
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unsigned long count, loff_t to, size_t *retlen)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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if (!(mtd->flags & MTD_WRITEABLE))
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return -EROFS;
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2008-07-18 18:00:33 +02:00
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return part->master->writev(part->master, vecs, count,
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2005-04-17 00:20:36 +02:00
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to + part->offset, retlen);
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}
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2008-07-18 18:00:33 +02:00
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static int part_erase(struct mtd_info *mtd, struct erase_info *instr)
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2005-04-17 00:20:36 +02:00
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{
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struct mtd_part *part = PART(mtd);
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int ret;
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if (!(mtd->flags & MTD_WRITEABLE))
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return -EROFS;
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if (instr->addr >= mtd->size)
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return -EINVAL;
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instr->addr += part->offset;
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2011-12-23 14:25:39 +01:00
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ret = mtd_erase(part->master, instr);
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2007-03-08 11:20:12 +01:00
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if (ret) {
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2008-08-12 11:40:50 +02:00
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if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
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2007-03-08 11:20:12 +01:00
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instr->fail_addr -= part->offset;
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instr->addr -= part->offset;
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}
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2005-04-17 00:20:36 +02:00
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return ret;
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}
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void mtd_erase_callback(struct erase_info *instr)
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{
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if (instr->mtd->erase == part_erase) {
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struct mtd_part *part = PART(instr->mtd);
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2008-08-12 11:40:50 +02:00
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if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
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2005-04-17 00:20:36 +02:00
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instr->fail_addr -= part->offset;
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instr->addr -= part->offset;
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}
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if (instr->callback)
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instr->callback(instr);
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}
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|
|
|
EXPORT_SYMBOL_GPL(mtd_erase_callback);
|
|
|
|
|
2008-12-10 14:37:21 +01:00
|
|
|
static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct mtd_part *part = PART(mtd);
|
2005-11-07 12:15:26 +01:00
|
|
|
if ((len + ofs) > mtd->size)
|
2005-04-17 00:20:36 +02:00
|
|
|
return -EINVAL;
|
|
|
|
return part->master->lock(part->master, ofs + part->offset, len);
|
|
|
|
}
|
|
|
|
|
2008-12-10 14:37:21 +01:00
|
|
|
static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct mtd_part *part = PART(mtd);
|
2005-11-07 12:15:26 +01:00
|
|
|
if ((len + ofs) > mtd->size)
|
2005-04-17 00:20:36 +02:00
|
|
|
return -EINVAL;
|
|
|
|
return part->master->unlock(part->master, ofs + part->offset, len);
|
|
|
|
}
|
|
|
|
|
2010-06-14 18:10:33 +02:00
|
|
|
static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
|
|
|
|
{
|
|
|
|
struct mtd_part *part = PART(mtd);
|
|
|
|
if ((len + ofs) > mtd->size)
|
|
|
|
return -EINVAL;
|
|
|
|
return part->master->is_locked(part->master, ofs + part->offset, len);
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
static void part_sync(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct mtd_part *part = PART(mtd);
|
|
|
|
part->master->sync(part->master);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int part_suspend(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct mtd_part *part = PART(mtd);
|
|
|
|
return part->master->suspend(part->master);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void part_resume(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct mtd_part *part = PART(mtd);
|
|
|
|
part->master->resume(part->master);
|
|
|
|
}
|
|
|
|
|
2008-07-18 18:00:33 +02:00
|
|
|
static int part_block_isbad(struct mtd_info *mtd, loff_t ofs)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct mtd_part *part = PART(mtd);
|
|
|
|
if (ofs >= mtd->size)
|
|
|
|
return -EINVAL;
|
|
|
|
ofs += part->offset;
|
|
|
|
return part->master->block_isbad(part->master, ofs);
|
|
|
|
}
|
|
|
|
|
2008-07-18 18:00:33 +02:00
|
|
|
static int part_block_markbad(struct mtd_info *mtd, loff_t ofs)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct mtd_part *part = PART(mtd);
|
2006-05-30 00:37:34 +02:00
|
|
|
int res;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
if (!(mtd->flags & MTD_WRITEABLE))
|
|
|
|
return -EROFS;
|
|
|
|
if (ofs >= mtd->size)
|
|
|
|
return -EINVAL;
|
|
|
|
ofs += part->offset;
|
2006-05-30 00:37:34 +02:00
|
|
|
res = part->master->block_markbad(part->master, ofs);
|
|
|
|
if (!res)
|
|
|
|
mtd->ecc_stats.badblocks++;
|
|
|
|
return res;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2010-09-17 12:31:41 +02:00
|
|
|
static inline void free_partition(struct mtd_part *p)
|
|
|
|
{
|
|
|
|
kfree(p->mtd.name);
|
|
|
|
kfree(p);
|
|
|
|
}
|
|
|
|
|
2005-11-07 12:15:26 +01:00
|
|
|
/*
|
|
|
|
* This function unregisters and destroy all slave MTD objects which are
|
2005-04-17 00:20:36 +02:00
|
|
|
* attached to the given master MTD object.
|
|
|
|
*/
|
|
|
|
|
|
|
|
int del_mtd_partitions(struct mtd_info *master)
|
|
|
|
{
|
2008-05-19 21:11:50 +02:00
|
|
|
struct mtd_part *slave, *next;
|
2010-09-17 12:31:41 +02:00
|
|
|
int ret, err = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-09-17 12:31:41 +02:00
|
|
|
mutex_lock(&mtd_partitions_mutex);
|
2008-05-19 21:11:50 +02:00
|
|
|
list_for_each_entry_safe(slave, next, &mtd_partitions, list)
|
2005-04-17 00:20:36 +02:00
|
|
|
if (slave->master == master) {
|
2010-09-17 12:31:41 +02:00
|
|
|
ret = del_mtd_device(&slave->mtd);
|
|
|
|
if (ret < 0) {
|
|
|
|
err = ret;
|
|
|
|
continue;
|
|
|
|
}
|
2008-05-19 21:11:50 +02:00
|
|
|
list_del(&slave->list);
|
2010-09-17 12:31:41 +02:00
|
|
|
free_partition(slave);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2010-09-17 12:31:41 +02:00
|
|
|
mutex_unlock(&mtd_partitions_mutex);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-09-17 12:31:41 +02:00
|
|
|
return err;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2010-09-17 12:31:41 +02:00
|
|
|
static struct mtd_part *allocate_partition(struct mtd_info *master,
|
|
|
|
const struct mtd_partition *part, int partno,
|
|
|
|
uint64_t cur_offset)
|
2008-07-18 18:00:18 +02:00
|
|
|
{
|
|
|
|
struct mtd_part *slave;
|
2010-09-17 12:31:41 +02:00
|
|
|
char *name;
|
2008-07-18 18:00:18 +02:00
|
|
|
|
|
|
|
/* allocate the partition structure */
|
2008-07-18 18:00:33 +02:00
|
|
|
slave = kzalloc(sizeof(*slave), GFP_KERNEL);
|
2010-09-17 12:31:41 +02:00
|
|
|
name = kstrdup(part->name, GFP_KERNEL);
|
|
|
|
if (!name || !slave) {
|
2008-07-18 18:00:33 +02:00
|
|
|
printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n",
|
2010-09-17 12:31:41 +02:00
|
|
|
master->name);
|
|
|
|
kfree(name);
|
|
|
|
kfree(slave);
|
|
|
|
return ERR_PTR(-ENOMEM);
|
2008-07-18 18:00:18 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* set up the MTD object for this partition */
|
|
|
|
slave->mtd.type = master->type;
|
|
|
|
slave->mtd.flags = master->flags & ~part->mask_flags;
|
|
|
|
slave->mtd.size = part->size;
|
|
|
|
slave->mtd.writesize = master->writesize;
|
2010-12-16 23:42:18 +01:00
|
|
|
slave->mtd.writebufsize = master->writebufsize;
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.oobsize = master->oobsize;
|
|
|
|
slave->mtd.oobavail = master->oobavail;
|
|
|
|
slave->mtd.subpage_sft = master->subpage_sft;
|
|
|
|
|
2010-09-17 12:31:41 +02:00
|
|
|
slave->mtd.name = name;
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.owner = master->owner;
|
2009-02-12 11:40:00 +01:00
|
|
|
slave->mtd.backing_dev_info = master->backing_dev_info;
|
2008-07-18 18:00:18 +02:00
|
|
|
|
2009-03-26 08:42:41 +01:00
|
|
|
/* NOTE: we don't arrange MTDs as a tree; it'd be error-prone
|
|
|
|
* to have the same data be in two different partitions.
|
|
|
|
*/
|
|
|
|
slave->mtd.dev.parent = master->dev.parent;
|
|
|
|
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.read = part_read;
|
|
|
|
slave->mtd.write = part_write;
|
|
|
|
|
|
|
|
if (master->panic_write)
|
|
|
|
slave->mtd.panic_write = part_panic_write;
|
|
|
|
|
2008-07-18 18:00:33 +02:00
|
|
|
if (master->point && master->unpoint) {
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.point = part_point;
|
|
|
|
slave->mtd.unpoint = part_unpoint;
|
|
|
|
}
|
|
|
|
|
2009-02-12 11:40:00 +01:00
|
|
|
if (master->get_unmapped_area)
|
|
|
|
slave->mtd.get_unmapped_area = part_get_unmapped_area;
|
2008-07-18 18:00:18 +02:00
|
|
|
if (master->read_oob)
|
|
|
|
slave->mtd.read_oob = part_read_oob;
|
|
|
|
if (master->write_oob)
|
|
|
|
slave->mtd.write_oob = part_write_oob;
|
2008-07-18 18:00:33 +02:00
|
|
|
if (master->read_user_prot_reg)
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
|
2008-07-18 18:00:33 +02:00
|
|
|
if (master->read_fact_prot_reg)
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
|
2008-07-18 18:00:33 +02:00
|
|
|
if (master->write_user_prot_reg)
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
|
2008-07-18 18:00:33 +02:00
|
|
|
if (master->lock_user_prot_reg)
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
|
2008-07-18 18:00:33 +02:00
|
|
|
if (master->get_user_prot_info)
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.get_user_prot_info = part_get_user_prot_info;
|
2008-07-18 18:00:33 +02:00
|
|
|
if (master->get_fact_prot_info)
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
|
|
|
|
if (master->sync)
|
|
|
|
slave->mtd.sync = part_sync;
|
2009-04-05 16:56:23 +02:00
|
|
|
if (!partno && !master->dev.class && master->suspend && master->resume) {
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.suspend = part_suspend;
|
|
|
|
slave->mtd.resume = part_resume;
|
|
|
|
}
|
|
|
|
if (master->writev)
|
|
|
|
slave->mtd.writev = part_writev;
|
|
|
|
if (master->lock)
|
|
|
|
slave->mtd.lock = part_lock;
|
|
|
|
if (master->unlock)
|
|
|
|
slave->mtd.unlock = part_unlock;
|
2010-06-14 18:10:33 +02:00
|
|
|
if (master->is_locked)
|
|
|
|
slave->mtd.is_locked = part_is_locked;
|
2008-07-18 18:00:18 +02:00
|
|
|
if (master->block_isbad)
|
|
|
|
slave->mtd.block_isbad = part_block_isbad;
|
|
|
|
if (master->block_markbad)
|
|
|
|
slave->mtd.block_markbad = part_block_markbad;
|
|
|
|
slave->mtd.erase = part_erase;
|
|
|
|
slave->master = master;
|
|
|
|
slave->offset = part->offset;
|
|
|
|
|
|
|
|
if (slave->offset == MTDPART_OFS_APPEND)
|
|
|
|
slave->offset = cur_offset;
|
|
|
|
if (slave->offset == MTDPART_OFS_NXTBLK) {
|
|
|
|
slave->offset = cur_offset;
|
2008-12-10 14:37:21 +01:00
|
|
|
if (mtd_mod_by_eb(cur_offset, master) != 0) {
|
2008-07-18 18:00:18 +02:00
|
|
|
/* Round up to next erasesize */
|
2008-12-10 14:37:21 +01:00
|
|
|
slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
|
2008-07-18 18:00:18 +02:00
|
|
|
printk(KERN_NOTICE "Moving partition %d: "
|
2008-12-10 14:37:21 +01:00
|
|
|
"0x%012llx -> 0x%012llx\n", partno,
|
|
|
|
(unsigned long long)cur_offset, (unsigned long long)slave->offset);
|
2008-07-18 18:00:18 +02:00
|
|
|
}
|
|
|
|
}
|
2011-06-06 16:04:14 +02:00
|
|
|
if (slave->offset == MTDPART_OFS_RETAIN) {
|
|
|
|
slave->offset = cur_offset;
|
|
|
|
if (master->size - slave->offset >= slave->mtd.size) {
|
|
|
|
slave->mtd.size = master->size - slave->offset
|
|
|
|
- slave->mtd.size;
|
|
|
|
} else {
|
|
|
|
printk(KERN_ERR "mtd partition \"%s\" doesn't have enough space: %#llx < %#llx, disabled\n",
|
|
|
|
part->name, master->size - slave->offset,
|
|
|
|
slave->mtd.size);
|
|
|
|
/* register to preserve ordering */
|
|
|
|
goto out_register;
|
|
|
|
}
|
|
|
|
}
|
2008-07-18 18:00:18 +02:00
|
|
|
if (slave->mtd.size == MTDPART_SIZ_FULL)
|
|
|
|
slave->mtd.size = master->size - slave->offset;
|
|
|
|
|
2008-12-10 14:37:21 +01:00
|
|
|
printk(KERN_NOTICE "0x%012llx-0x%012llx : \"%s\"\n", (unsigned long long)slave->offset,
|
|
|
|
(unsigned long long)(slave->offset + slave->mtd.size), slave->mtd.name);
|
2008-07-18 18:00:18 +02:00
|
|
|
|
|
|
|
/* let's do some sanity checks */
|
|
|
|
if (slave->offset >= master->size) {
|
2008-07-18 18:01:22 +02:00
|
|
|
/* let's register it anyway to preserve ordering */
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->offset = 0;
|
|
|
|
slave->mtd.size = 0;
|
2008-07-18 18:00:33 +02:00
|
|
|
printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n",
|
2008-07-18 18:00:18 +02:00
|
|
|
part->name);
|
2008-07-18 18:01:22 +02:00
|
|
|
goto out_register;
|
2008-07-18 18:00:18 +02:00
|
|
|
}
|
|
|
|
if (slave->offset + slave->mtd.size > master->size) {
|
|
|
|
slave->mtd.size = master->size - slave->offset;
|
2008-12-10 14:37:21 +01:00
|
|
|
printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n",
|
|
|
|
part->name, master->name, (unsigned long long)slave->mtd.size);
|
2008-07-18 18:00:18 +02:00
|
|
|
}
|
2008-07-18 18:00:33 +02:00
|
|
|
if (master->numeraseregions > 1) {
|
2008-07-18 18:00:18 +02:00
|
|
|
/* Deal with variable erase size stuff */
|
2008-07-18 18:00:57 +02:00
|
|
|
int i, max = master->numeraseregions;
|
2008-12-10 14:37:21 +01:00
|
|
|
u64 end = slave->offset + slave->mtd.size;
|
2008-07-18 18:00:18 +02:00
|
|
|
struct mtd_erase_region_info *regions = master->eraseregions;
|
|
|
|
|
2008-07-18 18:00:57 +02:00
|
|
|
/* Find the first erase regions which is part of this
|
|
|
|
* partition. */
|
|
|
|
for (i = 0; i < max && regions[i].offset <= slave->offset; i++)
|
2008-07-18 18:00:18 +02:00
|
|
|
;
|
2008-07-18 18:00:57 +02:00
|
|
|
/* The loop searched for the region _behind_ the first one */
|
2009-09-18 21:51:50 +02:00
|
|
|
if (i > 0)
|
|
|
|
i--;
|
2008-07-18 18:00:18 +02:00
|
|
|
|
2008-07-18 18:00:57 +02:00
|
|
|
/* Pick biggest erasesize */
|
|
|
|
for (; i < max && regions[i].offset < end; i++) {
|
2008-07-18 18:00:18 +02:00
|
|
|
if (slave->mtd.erasesize < regions[i].erasesize) {
|
|
|
|
slave->mtd.erasesize = regions[i].erasesize;
|
|
|
|
}
|
|
|
|
}
|
2008-07-18 18:00:57 +02:00
|
|
|
BUG_ON(slave->mtd.erasesize == 0);
|
2008-07-18 18:00:18 +02:00
|
|
|
} else {
|
|
|
|
/* Single erase size */
|
|
|
|
slave->mtd.erasesize = master->erasesize;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((slave->mtd.flags & MTD_WRITEABLE) &&
|
2008-12-10 14:37:21 +01:00
|
|
|
mtd_mod_by_eb(slave->offset, &slave->mtd)) {
|
2008-07-18 18:00:18 +02:00
|
|
|
/* Doesn't start on a boundary of major erase size */
|
2008-07-18 18:00:33 +02:00
|
|
|
/* FIXME: Let it be writable if it is on a boundary of
|
|
|
|
* _minor_ erase size though */
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.flags &= ~MTD_WRITEABLE;
|
2008-07-18 18:00:33 +02:00
|
|
|
printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
|
2008-07-18 18:00:18 +02:00
|
|
|
part->name);
|
|
|
|
}
|
|
|
|
if ((slave->mtd.flags & MTD_WRITEABLE) &&
|
2008-12-10 14:37:21 +01:00
|
|
|
mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) {
|
2008-07-18 18:00:18 +02:00
|
|
|
slave->mtd.flags &= ~MTD_WRITEABLE;
|
2008-07-18 18:00:33 +02:00
|
|
|
printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
|
2008-07-18 18:00:18 +02:00
|
|
|
part->name);
|
|
|
|
}
|
|
|
|
|
|
|
|
slave->mtd.ecclayout = master->ecclayout;
|
|
|
|
if (master->block_isbad) {
|
2008-12-10 14:37:21 +01:00
|
|
|
uint64_t offs = 0;
|
2008-07-18 18:00:18 +02:00
|
|
|
|
2008-07-18 18:00:33 +02:00
|
|
|
while (offs < slave->mtd.size) {
|
2008-07-18 18:00:18 +02:00
|
|
|
if (master->block_isbad(master,
|
|
|
|
offs + slave->offset))
|
|
|
|
slave->mtd.ecc_stats.badblocks++;
|
|
|
|
offs += slave->mtd.erasesize;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-18 18:01:22 +02:00
|
|
|
out_register:
|
2008-07-18 18:00:18 +02:00
|
|
|
return slave;
|
|
|
|
}
|
|
|
|
|
2010-09-17 12:31:41 +02:00
|
|
|
int mtd_add_partition(struct mtd_info *master, char *name,
|
|
|
|
long long offset, long long length)
|
|
|
|
{
|
|
|
|
struct mtd_partition part;
|
|
|
|
struct mtd_part *p, *new;
|
|
|
|
uint64_t start, end;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
/* the direct offset is expected */
|
|
|
|
if (offset == MTDPART_OFS_APPEND ||
|
|
|
|
offset == MTDPART_OFS_NXTBLK)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (length == MTDPART_SIZ_FULL)
|
|
|
|
length = master->size - offset;
|
|
|
|
|
|
|
|
if (length <= 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
part.name = name;
|
|
|
|
part.size = length;
|
|
|
|
part.offset = offset;
|
|
|
|
part.mask_flags = 0;
|
|
|
|
part.ecclayout = NULL;
|
|
|
|
|
|
|
|
new = allocate_partition(master, &part, -1, offset);
|
|
|
|
if (IS_ERR(new))
|
|
|
|
return PTR_ERR(new);
|
|
|
|
|
|
|
|
start = offset;
|
|
|
|
end = offset + length;
|
|
|
|
|
|
|
|
mutex_lock(&mtd_partitions_mutex);
|
|
|
|
list_for_each_entry(p, &mtd_partitions, list)
|
|
|
|
if (p->master == master) {
|
|
|
|
if ((start >= p->offset) &&
|
|
|
|
(start < (p->offset + p->mtd.size)))
|
|
|
|
goto err_inv;
|
|
|
|
|
|
|
|
if ((end >= p->offset) &&
|
|
|
|
(end < (p->offset + p->mtd.size)))
|
|
|
|
goto err_inv;
|
|
|
|
}
|
|
|
|
|
|
|
|
list_add(&new->list, &mtd_partitions);
|
|
|
|
mutex_unlock(&mtd_partitions_mutex);
|
|
|
|
|
|
|
|
add_mtd_device(&new->mtd);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
err_inv:
|
|
|
|
mutex_unlock(&mtd_partitions_mutex);
|
|
|
|
free_partition(new);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(mtd_add_partition);
|
|
|
|
|
|
|
|
int mtd_del_partition(struct mtd_info *master, int partno)
|
|
|
|
{
|
|
|
|
struct mtd_part *slave, *next;
|
|
|
|
int ret = -EINVAL;
|
|
|
|
|
|
|
|
mutex_lock(&mtd_partitions_mutex);
|
|
|
|
list_for_each_entry_safe(slave, next, &mtd_partitions, list)
|
|
|
|
if ((slave->master == master) &&
|
|
|
|
(slave->mtd.index == partno)) {
|
|
|
|
ret = del_mtd_device(&slave->mtd);
|
|
|
|
if (ret < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
list_del(&slave->list);
|
|
|
|
free_partition(slave);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
mutex_unlock(&mtd_partitions_mutex);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(mtd_del_partition);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* This function, given a master MTD object and a partition table, creates
|
|
|
|
* and registers slave MTD objects which are bound to the master according to
|
|
|
|
* the partition definitions.
|
2009-03-26 08:42:41 +01:00
|
|
|
*
|
|
|
|
* We don't register the master, or expect the caller to have done so,
|
|
|
|
* for reasons of data integrity.
|
2005-04-17 00:20:36 +02:00
|
|
|
*/
|
|
|
|
|
2005-11-07 12:15:26 +01:00
|
|
|
int add_mtd_partitions(struct mtd_info *master,
|
2005-04-17 00:20:36 +02:00
|
|
|
const struct mtd_partition *parts,
|
|
|
|
int nbparts)
|
|
|
|
{
|
|
|
|
struct mtd_part *slave;
|
2008-12-10 14:37:21 +01:00
|
|
|
uint64_t cur_offset = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
int i;
|
|
|
|
|
2008-07-18 18:00:33 +02:00
|
|
|
printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
for (i = 0; i < nbparts; i++) {
|
2010-09-17 12:31:41 +02:00
|
|
|
slave = allocate_partition(master, parts + i, i, cur_offset);
|
|
|
|
if (IS_ERR(slave))
|
|
|
|
return PTR_ERR(slave);
|
|
|
|
|
|
|
|
mutex_lock(&mtd_partitions_mutex);
|
|
|
|
list_add(&slave->list, &mtd_partitions);
|
|
|
|
mutex_unlock(&mtd_partitions_mutex);
|
|
|
|
|
|
|
|
add_mtd_device(&slave->mtd);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
cur_offset = slave->offset + slave->mtd.size;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEFINE_SPINLOCK(part_parser_lock);
|
|
|
|
static LIST_HEAD(part_parsers);
|
|
|
|
|
|
|
|
static struct mtd_part_parser *get_partition_parser(const char *name)
|
|
|
|
{
|
2008-05-19 21:11:50 +02:00
|
|
|
struct mtd_part_parser *p, *ret = NULL;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2008-05-19 21:11:50 +02:00
|
|
|
spin_lock(&part_parser_lock);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2008-05-19 21:11:50 +02:00
|
|
|
list_for_each_entry(p, &part_parsers, list)
|
2005-04-17 00:20:36 +02:00
|
|
|
if (!strcmp(p->name, name) && try_module_get(p->owner)) {
|
|
|
|
ret = p;
|
|
|
|
break;
|
|
|
|
}
|
2008-05-19 21:11:50 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
spin_unlock(&part_parser_lock);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2011-06-23 13:26:14 +02:00
|
|
|
#define put_partition_parser(p) do { module_put((p)->owner); } while (0)
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
int register_mtd_parser(struct mtd_part_parser *p)
|
|
|
|
{
|
|
|
|
spin_lock(&part_parser_lock);
|
|
|
|
list_add(&p->list, &part_parsers);
|
|
|
|
spin_unlock(&part_parser_lock);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2008-07-18 18:00:33 +02:00
|
|
|
EXPORT_SYMBOL_GPL(register_mtd_parser);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
int deregister_mtd_parser(struct mtd_part_parser *p)
|
|
|
|
{
|
|
|
|
spin_lock(&part_parser_lock);
|
|
|
|
list_del(&p->list);
|
|
|
|
spin_unlock(&part_parser_lock);
|
|
|
|
return 0;
|
|
|
|
}
|
2008-07-18 18:00:33 +02:00
|
|
|
EXPORT_SYMBOL_GPL(deregister_mtd_parser);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2011-06-08 10:42:27 +02:00
|
|
|
/*
|
|
|
|
* Do not forget to update 'parse_mtd_partitions()' kerneldoc comment if you
|
|
|
|
* are changing this array!
|
|
|
|
*/
|
2011-05-29 19:32:33 +02:00
|
|
|
static const char *default_mtd_part_types[] = {
|
|
|
|
"cmdlinepart",
|
|
|
|
"ofpart",
|
|
|
|
NULL
|
|
|
|
};
|
2011-06-02 16:51:16 +02:00
|
|
|
|
2011-06-08 10:42:27 +02:00
|
|
|
/**
|
|
|
|
* parse_mtd_partitions - parse MTD partitions
|
|
|
|
* @master: the master partition (describes whole MTD device)
|
|
|
|
* @types: names of partition parsers to try or %NULL
|
|
|
|
* @pparts: array of partitions found is returned here
|
2011-06-10 16:18:28 +02:00
|
|
|
* @data: MTD partition parser-specific data
|
2011-06-08 10:42:27 +02:00
|
|
|
*
|
|
|
|
* This function tries to find partition on MTD device @master. It uses MTD
|
|
|
|
* partition parsers, specified in @types. However, if @types is %NULL, then
|
|
|
|
* the default list of parsers is used. The default list contains only the
|
2011-05-29 19:32:33 +02:00
|
|
|
* "cmdlinepart" and "ofpart" parsers ATM.
|
2011-06-08 10:42:27 +02:00
|
|
|
*
|
|
|
|
* This function may return:
|
|
|
|
* o a negative error code in case of failure
|
|
|
|
* o zero if no partitions were found
|
|
|
|
* o a positive number of found partitions, in which case on exit @pparts will
|
|
|
|
* point to an array containing this number of &struct mtd_info objects.
|
|
|
|
*/
|
2005-11-07 12:15:26 +01:00
|
|
|
int parse_mtd_partitions(struct mtd_info *master, const char **types,
|
2011-06-10 16:18:28 +02:00
|
|
|
struct mtd_partition **pparts,
|
|
|
|
struct mtd_part_parser_data *data)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct mtd_part_parser *parser;
|
|
|
|
int ret = 0;
|
2005-11-07 12:15:26 +01:00
|
|
|
|
2011-06-02 16:51:16 +02:00
|
|
|
if (!types)
|
|
|
|
types = default_mtd_part_types;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
for ( ; ret <= 0 && *types; types++) {
|
|
|
|
parser = get_partition_parser(*types);
|
|
|
|
if (!parser && !request_module("%s", *types))
|
|
|
|
parser = get_partition_parser(*types);
|
2011-05-17 10:13:17 +02:00
|
|
|
if (!parser)
|
2005-04-17 00:20:36 +02:00
|
|
|
continue;
|
2011-06-10 16:18:28 +02:00
|
|
|
ret = (*parser->parse_fn)(master, pparts, data);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (ret > 0) {
|
2005-11-07 12:15:26 +01:00
|
|
|
printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n",
|
2005-04-17 00:20:36 +02:00
|
|
|
ret, parser->name, master->name);
|
|
|
|
}
|
|
|
|
put_partition_parser(parser);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
2010-09-17 12:31:41 +02:00
|
|
|
|
2010-11-23 13:17:17 +01:00
|
|
|
int mtd_is_partition(struct mtd_info *mtd)
|
2010-09-17 12:31:41 +02:00
|
|
|
{
|
|
|
|
struct mtd_part *part;
|
2010-11-23 13:17:17 +01:00
|
|
|
int ispart = 0;
|
2010-09-17 12:31:41 +02:00
|
|
|
|
|
|
|
mutex_lock(&mtd_partitions_mutex);
|
|
|
|
list_for_each_entry(part, &mtd_partitions, list)
|
|
|
|
if (&part->mtd == mtd) {
|
2010-11-23 13:17:17 +01:00
|
|
|
ispart = 1;
|
2010-09-17 12:31:41 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
mutex_unlock(&mtd_partitions_mutex);
|
|
|
|
|
2010-11-23 13:17:17 +01:00
|
|
|
return ispart;
|
2010-09-17 12:31:41 +02:00
|
|
|
}
|
2010-11-23 13:17:17 +01:00
|
|
|
EXPORT_SYMBOL_GPL(mtd_is_partition);
|