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Commit 8c1e760a authored by Rafał Miłecki's avatar Rafał Miłecki
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kernel: backport upstream mtdpart.c cleanups 


Except for renames and line changes the only conflict was in
allocate_partition in handling MTD_WRITEABLE. Hopefully it was handled
correctly.

Signed-off-by: default avatarRafał Miłecki <rafal@milecki.pl>
parent 4052443a
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with 1094 additions and 54 deletions
target/linux/generic/patches-4.9/064-v4.11-0001-mtd-introduce-function-max_bad_blocks.patch 0 → 100644
+ 73
− 0
View file @ 8c1e760a
From 6080ef6e7c0a0592cbcca11200d879faf65e27d4 Mon Sep 17 00:00:00 2001
From: Jeff Westfahl <jeff.westfahl@ni.com>
Date: Tue, 10 Jan 2017 13:30:17 -0600
Subject: [PATCH] mtd: introduce function max_bad_blocks
If implemented, 'max_bad_blocks' returns the maximum number of bad
blocks to reserve for a MTD. An implementation for NAND is coming soon.
Signed-off-by: Jeff Westfahl <jeff.westfahl@ni.com>
Signed-off-by: Zach Brown <zach.brown@ni.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electron.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
drivers/mtd/mtdpart.c | 10 ++++++++++
include/linux/mtd/mtd.h | 13 +++++++++++++
2 files changed, 23 insertions(+)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -349,6 +349,14 @@ static const struct mtd_ooblayout_ops pa
.free = part_ooblayout_free,
};
+static int part_max_bad_blocks(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+ struct mtd_part *part = mtd_to_part(mtd);
+
+ return part->master->_max_bad_blocks(part->master,
+ ofs + part->offset, len);
+}
+
static inline void free_partition(struct mtd_part *p)
{
kfree(p->mtd.name);
@@ -475,6 +483,8 @@ static struct mtd_part *allocate_partiti
slave->mtd._block_isbad = part_block_isbad;
if (master->_block_markbad)
slave->mtd._block_markbad = part_block_markbad;
+ if (master->_max_bad_blocks)
+ slave->mtd._max_bad_blocks = part_max_bad_blocks;
if (master->_get_device)
slave->mtd._get_device = part_get_device;
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -322,6 +322,7 @@ struct mtd_info {
int (*_block_isreserved) (struct mtd_info *mtd, loff_t ofs);
int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs);
int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);
+ int (*_max_bad_blocks) (struct mtd_info *mtd, loff_t ofs, size_t len);
int (*_suspend) (struct mtd_info *mtd);
void (*_resume) (struct mtd_info *mtd);
void (*_reboot) (struct mtd_info *mtd);
@@ -397,6 +398,18 @@ static inline int mtd_oobavail(struct mt
return ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize;
}
+static inline int mtd_max_bad_blocks(struct mtd_info *mtd,
+ loff_t ofs, size_t len)
+{
+ if (!mtd->_max_bad_blocks)
+ return -ENOTSUPP;
+
+ if (mtd->size < (len + ofs) || ofs < 0)
+ return -EINVAL;
+
+ return mtd->_max_bad_blocks(mtd, ofs, len);
+}
+
int mtd_wunit_to_pairing_info(struct mtd_info *mtd, int wunit,
struct mtd_pairing_info *info);
int mtd_pairing_info_to_wunit(struct mtd_info *mtd,
target/linux/generic/patches-4.9/064-v4.11-0002-mtd-Add-partition-device-node-to-mtd-partition-devic.patch 0 → 100644
+ 50
− 0
View file @ 8c1e760a
From 42e9401bd1467d22c4dc4d2c637347b874e6a80b Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 9 Feb 2017 11:50:24 +0100
Subject: [PATCH] mtd: Add partition device node to mtd partition devices
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The user visible change here is that mtd partitions get an of_node link
in sysfs.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
drivers/mtd/mtdpart.c | 1 +
drivers/mtd/ofpart.c | 1 +
include/linux/mtd/partitions.h | 1 +
3 files changed, 3 insertions(+)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -432,6 +432,7 @@ static struct mtd_part *allocate_partiti
slave->mtd.dev.parent = IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER) ?
&master->dev :
master->dev.parent;
+ slave->mtd.dev.of_node = part->of_node;
slave->mtd._read = part_read;
slave->mtd._write = part_write;
--- a/drivers/mtd/ofpart.c
+++ b/drivers/mtd/ofpart.c
@@ -108,6 +108,7 @@ static int parse_ofpart_partitions(struc
parts[i].offset = of_read_number(reg, a_cells);
parts[i].size = of_read_number(reg + a_cells, s_cells);
+ parts[i].of_node = pp;
partname = of_get_property(pp, "label", &len);
if (!partname)
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -41,6 +41,7 @@ struct mtd_partition {
uint64_t size; /* partition size */
uint64_t offset; /* offset within the master MTD space */
uint32_t mask_flags; /* master MTD flags to mask out for this partition */
+ struct device_node *of_node;
};
#define MTDPART_OFS_RETAIN (-3)
target/linux/generic/patches-4.9/065-v4.13-0001-mtd-handle-partitioning-on-devices-with-0-erasesize.patch 0 → 100644
+ 77
− 0
View file @ 8c1e760a
From 1eeef2d7483a7e3f8d2dd2a5b9939b3b814dc549 Mon Sep 17 00:00:00 2001
From: Chris Packham <chris.packham@alliedtelesis.co.nz>
Date: Fri, 9 Jun 2017 15:58:31 +1200
Subject: [PATCH] mtd: handle partitioning on devices with 0 erasesize
erasesize is meaningful for flash devices but for SRAM there is no
concept of an erase block so erasesize is set to 0. When partitioning
these devices instead of ensuring partitions fall on erasesize
boundaries we ensure they fall on writesize boundaries.
Helped-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
drivers/mtd/mtdpart.c | 26 +++++++++++++++++---------
1 file changed, 17 insertions(+), 9 deletions(-)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -393,8 +393,12 @@ static struct mtd_part *allocate_partiti
const struct mtd_partition *part, int partno,
uint64_t cur_offset)
{
+ int wr_alignment = (master->flags & MTD_NO_ERASE) ? master->writesize:
+ master->erasesize;
struct mtd_part *slave;
+ u32 remainder;
char *name;
+ u64 tmp;
/* allocate the partition structure */
slave = kzalloc(sizeof(*slave), GFP_KERNEL);
@@ -499,10 +503,11 @@ static struct mtd_part *allocate_partiti
if (slave->offset == MTDPART_OFS_APPEND)
slave->offset = cur_offset;
if (slave->offset == MTDPART_OFS_NXTBLK) {
+ tmp = cur_offset;
slave->offset = cur_offset;
- if (mtd_mod_by_eb(cur_offset, master) != 0) {
- /* Round up to next erasesize */
- slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
+ remainder = do_div(tmp, wr_alignment);
+ if (remainder) {
+ slave->offset += wr_alignment - remainder;
printk(KERN_NOTICE "Moving partition %d: "
"0x%012llx -> 0x%012llx\n", partno,
(unsigned long long)cur_offset, (unsigned long long)slave->offset);
@@ -567,19 +572,22 @@ static struct mtd_part *allocate_partiti
slave->mtd.erasesize = master->erasesize;
}
- if ((slave->mtd.flags & MTD_WRITEABLE) &&
- mtd_mod_by_eb(slave->offset, &slave->mtd)) {
+ tmp = slave->offset;
+ remainder = do_div(tmp, wr_alignment);
+ if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
/* Doesn't start on a boundary of major erase size */
/* FIXME: Let it be writable if it is on a boundary of
* _minor_ erase size though */
slave->mtd.flags &= ~MTD_WRITEABLE;
- printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
+ printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase/write block boundary -- force read-only\n",
part->name);
}
- if ((slave->mtd.flags & MTD_WRITEABLE) &&
- mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) {
+
+ tmp = slave->mtd.size;
+ remainder = do_div(tmp, wr_alignment);
+ if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
slave->mtd.flags &= ~MTD_WRITEABLE;
- printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
+ printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase/write block -- force read-only\n",
part->name);
}
target/linux/generic/patches-4.9/065-v4.13-0002-mtd-partitions-factor-out-code-calling-parser.patch 0 → 100644
+ 68
− 0
View file @ 8c1e760a
From 01f9c7240a900d5676a8496496f2974dd36996b1 Mon Sep 17 00:00:00 2001
From: Brian Norris <computersforpeace@gmail.com>
Date: Tue, 23 May 2017 07:30:20 +0200
Subject: [PATCH] mtd: partitions: factor out code calling parser
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This code is going to be reused for parsers matched using OF so let's
factor it out to make this easier.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Brian Norris <computersforpeace@gmail.com>
---
drivers/mtd/mtdpart.c | 33 ++++++++++++++++++++++++---------
1 file changed, 24 insertions(+), 9 deletions(-)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -807,6 +807,27 @@ static const char * const default_mtd_pa
NULL
};
+static int mtd_part_do_parse(struct mtd_part_parser *parser,
+ struct mtd_info *master,
+ struct mtd_partitions *pparts,
+ struct mtd_part_parser_data *data)
+{
+ int ret;
+
+ ret = (*parser->parse_fn)(master, &pparts->parts, data);
+ pr_debug("%s: parser %s: %i\n", master->name, parser->name, ret);
+ if (ret <= 0)
+ return ret;
+
+ pr_notice("%d %s partitions found on MTD device %s\n", ret,
+ parser->name, master->name);
+
+ pparts->nr_parts = ret;
+ pparts->parser = parser;
+
+ return ret;
+}
+
/**
* parse_mtd_partitions - parse MTD partitions
* @master: the master partition (describes whole MTD device)
@@ -847,16 +868,10 @@ int parse_mtd_partitions(struct mtd_info
parser ? parser->name : NULL);
if (!parser)
continue;
- ret = (*parser->parse_fn)(master, &pparts->parts, data);
- pr_debug("%s: parser %s: %i\n",
- master->name, parser->name, ret);
- if (ret > 0) {
- printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n",
- ret, parser->name, master->name);
- pparts->nr_parts = ret;
- pparts->parser = parser;
+ ret = mtd_part_do_parse(parser, master, pparts, data);
+ /* Found partitions! */
+ if (ret > 0)
return 0;
- }
mtd_part_parser_put(parser);
/*
* Stash the first error we see; only report it if no parser
target/linux/generic/patches-4.9/065-v4.13-0003-mtd-partitions-add-helper-for-deleting-partition.patch 0 → 100644
+ 119
− 0
View file @ 8c1e760a
From 08263a9ae664b24fa777d20b365601534842b236 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Wed, 21 Jun 2017 08:26:42 +0200
Subject: [PATCH] mtd: partitions: add helper for deleting partition
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
There are two similar functions handling deletion. One handles single
partition and another the whole MTD flash device. They share (duplicate)
some code so it makes sense to add a small helper for that part.
Function del_mtd_partitions has been moved a bit to keep all deleting
stuff together.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
drivers/mtd/mtdpart.c | 75 +++++++++++++++++++++++++++++----------------------
1 file changed, 43 insertions(+), 32 deletions(-)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -363,32 +363,6 @@ static inline void free_partition(struct
kfree(p);
}
-/*
- * This function unregisters and destroy all slave MTD objects which are
- * attached to the given master MTD object.
- */
-
-int del_mtd_partitions(struct mtd_info *master)
-{
- struct mtd_part *slave, *next;
- int ret, err = 0;
-
- mutex_lock(&mtd_partitions_mutex);
- list_for_each_entry_safe(slave, next, &mtd_partitions, list)
- if (slave->master == master) {
- ret = del_mtd_device(&slave->mtd);
- if (ret < 0) {
- err = ret;
- continue;
- }
- list_del(&slave->list);
- free_partition(slave);
- }
- mutex_unlock(&mtd_partitions_mutex);
-
- return err;
-}
-
static struct mtd_part *allocate_partition(struct mtd_info *master,
const struct mtd_partition *part, int partno,
uint64_t cur_offset)
@@ -675,6 +649,48 @@ int mtd_add_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_add_partition);
+/**
+ * __mtd_del_partition - delete MTD partition
+ *
+ * @priv: internal MTD struct for partition to be deleted
+ *
+ * This function must be called with the partitions mutex locked.
+ */
+static int __mtd_del_partition(struct mtd_part *priv)
+{
+ int err;
+
+ err = del_mtd_device(&priv->mtd);
+ if (err)
+ return err;
+
+ list_del(&priv->list);
+ free_partition(priv);
+
+ return 0;
+}
+
+/*
+ * This function unregisters and destroy all slave MTD objects which are
+ * attached to the given master MTD object.
+ */
+int del_mtd_partitions(struct mtd_info *master)
+{
+ struct mtd_part *slave, *next;
+ int ret, err = 0;
+
+ mutex_lock(&mtd_partitions_mutex);
+ list_for_each_entry_safe(slave, next, &mtd_partitions, list)
+ if (slave->master == master) {
+ ret = __mtd_del_partition(slave);
+ if (ret < 0)
+ err = ret;
+ }
+ mutex_unlock(&mtd_partitions_mutex);
+
+ return err;
+}
+
int mtd_del_partition(struct mtd_info *master, int partno)
{
struct mtd_part *slave, *next;
@@ -686,12 +702,7 @@ int mtd_del_partition(struct mtd_info *m
(slave->mtd.index == partno)) {
sysfs_remove_files(&slave->mtd.dev.kobj,
mtd_partition_attrs);
- ret = del_mtd_device(&slave->mtd);
- if (ret < 0)
- break;
-
- list_del(&slave->list);
- free_partition(slave);
+ ret = __mtd_del_partition(slave);
break;
}
mutex_unlock(&mtd_partitions_mutex);
target/linux/generic/patches-4.9/065-v4.13-0004-mtd-partitions-remove-sysfs-files-when-deleting-all-.patch 0 → 100644
+ 45
− 0
View file @ 8c1e760a
From c5ceaba74083daf619bdb34d4871e297a177eebf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Wed, 21 Jun 2017 08:26:43 +0200
Subject: [PATCH] mtd: partitions: remove sysfs files when deleting all
master's partitions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When support for sysfs "offset" file was added it missed to update the
del_mtd_partitions function. It deletes partitions just like
mtd_del_partition does so both should also take care of removing sysfs
files.
This change moves sysfs_remove_files call to the shared function to fix
this issue.
Fixes: a62c24d755291 ("mtd: part: Add sysfs variable for offset of partition")
Cc: Dan Ehrenberg <dehrenberg@chromium.org>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
drivers/mtd/mtdpart.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -660,6 +660,8 @@ static int __mtd_del_partition(struct mt
{
int err;
+ sysfs_remove_files(&priv->mtd.dev.kobj, mtd_partition_attrs);
+
err = del_mtd_device(&priv->mtd);
if (err)
return err;
@@ -700,8 +702,6 @@ int mtd_del_partition(struct mtd_info *m
list_for_each_entry_safe(slave, next, &mtd_partitions, list)
if ((slave->master == master) &&
(slave->mtd.index == partno)) {
- sysfs_remove_files(&slave->mtd.dev.kobj,
- mtd_partition_attrs);
ret = __mtd_del_partition(slave);
break;
}
target/linux/generic/patches-4.9/160-mtd-part-add-generic-parsing-of-linux-part-probe.patch
+ 3
− 3
View file @ 8c1e760a
......@@ -116,7 +116,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
#include <linux/err.h>
#include "mtdcore.h"
@@ -779,6 +780,42 @@ void deregister_mtd_parser(struct mtd_pa
@@ -815,6 +816,42 @@ void deregister_mtd_parser(struct mtd_pa
EXPORT_SYMBOL_GPL(deregister_mtd_parser);
/*
......@@ -159,7 +159,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* Do not forget to update 'parse_mtd_partitions()' kerneldoc comment if you
* are changing this array!
*/
@@ -815,6 +852,13 @@ int parse_mtd_partitions(struct mtd_info
@@ -872,6 +909,13 @@ int parse_mtd_partitions(struct mtd_info
{
struct mtd_part_parser *parser;
int ret, err = 0;
......@@ -173,7 +173,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
if (!types)
types = default_mtd_part_types;
@@ -846,6 +890,7 @@ int parse_mtd_partitions(struct mtd_info
@@ -897,6 +941,7 @@ int parse_mtd_partitions(struct mtd_info
if (ret < 0 && !err)
err = ret;
}
......
target/linux/generic/patches-4.9/400-mtd-add-rootfs-split-support.patch
+ 6
− 6
View file @ 8c1e760a
......@@ -39,7 +39,7 @@
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
@@ -46,6 +48,8 @@ struct mtd_part {
@@ -52,6 +54,8 @@ struct mtd_part {
struct list_head list;
};
......@@ -48,15 +48,15 @@
/*
* Given a pointer to the MTD object in the mtd_part structure, we can retrieve
* the pointer to that structure.
@@ -650,6 +654,7 @@ int mtd_add_partition(struct mtd_info *m
@@ -649,6 +653,7 @@ int mtd_add_partition(struct mtd_info *p
mutex_unlock(&mtd_partitions_mutex);
add_mtd_device(&new->mtd);
+ mtd_partition_split(master, new);
+ mtd_partition_split(parent, new);
mtd_add_partition_attrs(new);
@@ -682,6 +687,35 @@ int mtd_del_partition(struct mtd_info *m
@@ -718,6 +723,35 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
......@@ -92,7 +92,7 @@
/*
* 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
@@ -713,6 +747,7 @@ int add_mtd_partitions(struct mtd_info *
@@ -749,6 +783,7 @@ int add_mtd_partitions(struct mtd_info *
mutex_unlock(&mtd_partitions_mutex);
add_mtd_device(&slave->mtd);
......@@ -102,7 +102,7 @@
cur_offset = slave->offset + slave->mtd.size;
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -101,5 +101,7 @@ int mtd_add_partition(struct mtd_info *m
@@ -102,5 +102,7 @@ int mtd_add_partition(struct mtd_info *m
long long offset, long long length);
int mtd_del_partition(struct mtd_info *master, int partno);
uint64_t mtd_get_device_size(const struct mtd_info *mtd);
......
target/linux/generic/patches-4.9/401-mtd-add-support-for-different-partition-parser-types.patch
+ 4
− 4
View file @ 8c1e760a
......@@ -11,7 +11,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -945,6 +945,62 @@ void mtd_part_parser_cleanup(struct mtd_
@@ -996,6 +996,62 @@ void mtd_part_parser_cleanup(struct mtd_
}
}
......@@ -76,7 +76,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
struct mtd_part *part;
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -60,11 +60,14 @@ struct mtd_part_parser_data {
@@ -61,11 +61,14 @@ struct mtd_part_parser_data {
unsigned long origin;
};
......@@ -92,7 +92,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
struct mtd_part_parser {
struct list_head list;
struct module *owner;
@@ -72,6 +75,7 @@ struct mtd_part_parser {
@@ -73,6 +76,7 @@ struct mtd_part_parser {
int (*parse_fn)(struct mtd_info *, const struct mtd_partition **,
struct mtd_part_parser_data *);
void (*cleanup)(const struct mtd_partition *pparts, int nr_parts);
......@@ -100,7 +100,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
};
/* Container for passing around a set of parsed partitions */
@@ -104,4 +108,9 @@ uint64_t mtd_get_device_size(const struc
@@ -105,4 +109,9 @@ uint64_t mtd_get_device_size(const struc
extern void __weak arch_split_mtd_part(struct mtd_info *master,
const char *name, int offset, int size);
......
target/linux/generic/patches-4.9/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
+ 5
− 5
View file @ 8c1e760a
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -687,6 +687,36 @@ int mtd_del_partition(struct mtd_info *m
@@ -723,6 +723,36 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
......@@ -23,7 +23,7 @@
+ /* adjust partition offsets */
+ parts[i].offset += slave->offset;
+
+ mtd_add_partition(slave->master,
+ mtd_add_partition(slave->parent,
+ parts[i].name,
+ parts[i].offset,
+ parts[i].size);
......@@ -37,7 +37,7 @@
#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
#else
@@ -695,6 +725,7 @@ EXPORT_SYMBOL_GPL(mtd_del_partition);
@@ -731,6 +761,7 @@ EXPORT_SYMBOL_GPL(mtd_del_partition);
static void split_firmware(struct mtd_info *master, struct mtd_part *part)
{
......@@ -45,7 +45,7 @@
}
void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
@@ -709,6 +740,12 @@ static void mtd_partition_split(struct m
@@ -745,6 +776,12 @@ static void mtd_partition_split(struct m
if (rootfs_found)
return;
......@@ -60,7 +60,7 @@
split_firmware(master, part);
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -66,6 +66,8 @@ struct mtd_part_parser_data {
@@ -67,6 +67,8 @@ struct mtd_part_parser_data {
enum mtd_parser_type {
MTD_PARSER_TYPE_DEVICE = 0,
......
target/linux/generic/patches-4.9/404-mtd-add-more-helper-functions.patch
+ 5
− 5
View file @ 8c1e760a
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -717,6 +717,17 @@ run_parsers_by_type(struct mtd_part *sla
@@ -753,6 +753,17 @@ run_parsers_by_type(struct mtd_part *sla
return nr_parts;
}
......@@ -18,7 +18,7 @@
#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
#else
@@ -1055,6 +1066,24 @@ int mtd_is_partition(const struct mtd_in
@@ -1106,6 +1117,24 @@ int mtd_is_partition(const struct mtd_in
}
EXPORT_SYMBOL_GPL(mtd_is_partition);
......@@ -27,7 +27,7 @@
+ if (!mtd_is_partition(mtd))
+ return (struct mtd_info *)mtd;
+
+ return mtd_to_part(mtd)->master;
+ return mtd_to_part(mtd)->parent;
+}
+EXPORT_SYMBOL_GPL(mtdpart_get_master);
+
......@@ -45,7 +45,7 @@
{
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -106,6 +106,8 @@ int mtd_is_partition(const struct mtd_in
@@ -107,6 +107,8 @@ int mtd_is_partition(const struct mtd_in
int mtd_add_partition(struct mtd_info *master, const char *name,
long long offset, long long length);
int mtd_del_partition(struct mtd_info *master, int partno);
......@@ -56,7 +56,7 @@
const char *name, int offset, int size);
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -472,6 +472,24 @@ static inline uint32_t mtd_mod_by_eb(uin
@@ -485,6 +485,24 @@ static inline uint32_t mtd_mod_by_eb(uin
return do_div(sz, mtd->erasesize);
}
......
target/linux/generic/patches-4.9/410-mtd-move-forward-declaration-of-struct-mtd_info.patch
+ 1
− 1
View file @ 8c1e760a
......@@ -8,7 +8,7 @@
struct mtd_partition {
const char *name; /* identifier string */
@@ -49,7 +50,6 @@ struct mtd_partition {
@@ -50,7 +51,6 @@ struct mtd_partition {
#define MTDPART_SIZ_FULL (0)
......
target/linux/generic/patches-4.9/411-mtd-partial_eraseblock_write.patch
+ 27
− 25
View file @ 8c1e760a
......@@ -9,7 +9,7 @@
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
static DEFINE_MUTEX(mtd_partitions_mutex);
@@ -235,13 +237,61 @@ static int part_erase(struct mtd_info *m
@@ -241,13 +243,61 @@ static int part_erase(struct mtd_info *m
struct mtd_part *part = mtd_to_part(mtd);
int ret;
......@@ -19,33 +19,33 @@
+ size_t readlen = 0;
+ u64 mtd_ofs;
+
+ instr->erase_buf = kmalloc(part->master->erasesize, GFP_ATOMIC);
+ instr->erase_buf = kmalloc(part->parent->erasesize, GFP_ATOMIC);
+ if (!instr->erase_buf)
+ return -ENOMEM;
+
+ mtd_ofs = part->offset + instr->addr;
+ instr->erase_buf_ofs = do_div(mtd_ofs, part->master->erasesize);
+ instr->erase_buf_ofs = do_div(mtd_ofs, part->parent->erasesize);
+
+ if (instr->erase_buf_ofs > 0) {
+ instr->addr -= instr->erase_buf_ofs;
+ ret = mtd_read(part->master,
+ ret = mtd_read(part->parent,
+ instr->addr + part->offset,
+ part->master->erasesize,
+ part->parent->erasesize,
+ &readlen, instr->erase_buf);
+
+ instr->len += instr->erase_buf_ofs;
+ instr->partial_start = true;
+ } else {
+ mtd_ofs = part->offset + part->mtd.size;
+ instr->erase_buf_ofs = part->master->erasesize -
+ do_div(mtd_ofs, part->master->erasesize);
+ instr->erase_buf_ofs = part->parent->erasesize -
+ do_div(mtd_ofs, part->parent->erasesize);
+
+ if (instr->erase_buf_ofs > 0) {
+ instr->len += instr->erase_buf_ofs;
+ ret = mtd_read(part->master,
+ ret = mtd_read(part->parent,
+ part->offset + instr->addr +
+ instr->len - part->master->erasesize,
+ part->master->erasesize, &readlen,
+ instr->len - part->parent->erasesize,
+ part->parent->erasesize, &readlen,
+ instr->erase_buf);
+ } else {
+ ret = 0;
......@@ -59,7 +59,7 @@
+ }
+
instr->addr += part->offset;
ret = part->master->_erase(part->master, instr);
ret = part->parent->_erase(part->parent, instr);
if (ret) {
if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
instr->fail_addr -= part->offset;
......@@ -71,7 +71,7 @@
return ret;
}
@@ -249,6 +299,25 @@ void mtd_erase_callback(struct erase_inf
@@ -255,6 +305,25 @@ void mtd_erase_callback(struct erase_inf
{
if (instr->mtd->_erase == part_erase) {
struct mtd_part *part = mtd_to_part(instr->mtd);
......@@ -79,17 +79,17 @@
+
+ if (instr->mtd->flags & MTD_ERASE_PARTIAL) {
+ if (instr->partial_start) {
+ part->master->_write(part->master,
+ part->parent->_write(part->parent,
+ instr->addr, instr->erase_buf_ofs,
+ &wrlen, instr->erase_buf);
+ instr->addr += instr->erase_buf_ofs;
+ } else {
+ instr->len -= instr->erase_buf_ofs;
+ part->master->_write(part->master,
+ part->parent->_write(part->parent,
+ instr->addr + instr->len,
+ instr->erase_buf_ofs, &wrlen,
+ instr->erase_buf +
+ part->master->erasesize -
+ part->parent->erasesize -
+ instr->erase_buf_ofs);
+ }
+ kfree(instr->erase_buf);
......@@ -97,30 +97,32 @@
if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
instr->fail_addr -= part->offset;
@@ -564,17 +633,20 @@ static struct mtd_part *allocate_partiti
if ((slave->mtd.flags & MTD_WRITEABLE) &&
mtd_mod_by_eb(slave->offset, &slave->mtd)) {
@@ -561,19 +630,22 @@ static struct mtd_part *allocate_partiti
remainder = do_div(tmp, wr_alignment);
if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
/* Doesn't start on a boundary of major erase size */
- /* FIXME: Let it be writable if it is on a boundary of
- * _minor_ erase size though */
- slave->mtd.flags &= ~MTD_WRITEABLE;
- printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
- printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase/write block boundary -- force read-only\n",
- part->name);
+ slave->mtd.flags |= MTD_ERASE_PARTIAL;
+ if (((u32) slave->mtd.size) > master->erasesize)
+ if (((u32)slave->mtd.size) > parent->erasesize)
+ slave->mtd.flags &= ~MTD_WRITEABLE;
+ else
+ slave->mtd.erasesize = slave->mtd.size;
}
if ((slave->mtd.flags & MTD_WRITEABLE) &&
- mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) {
- tmp = slave->mtd.size;
+ tmp = slave->offset + slave->mtd.size;
remainder = do_div(tmp, wr_alignment);
if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
- slave->mtd.flags &= ~MTD_WRITEABLE;
- printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
- printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase/write block -- force read-only\n",
- part->name);
+ mtd_mod_by_eb(slave->offset + slave->mtd.size, &slave->mtd)) {
+ slave->mtd.flags |= MTD_ERASE_PARTIAL;
+
+ if ((u32) slave->mtd.size > master->erasesize)
+ if ((u32)slave->mtd.size > parent->erasesize)
+ slave->mtd.flags &= ~MTD_WRITEABLE;
+ else
+ slave->mtd.erasesize = slave->mtd.size;
......
target/linux/generic/patches-4.9/412-mtd-partial_eraseblock_unlock.patch
+ 5
− 5
View file @ 8c1e760a
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -337,7 +337,16 @@ static int part_lock(struct mtd_info *mt
@@ -343,7 +343,16 @@ static int part_lock(struct mtd_info *mt
static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = mtd_to_part(mtd);
- return part->master->_unlock(part->master, ofs + part->offset, len);
- return part->parent->_unlock(part->parent, ofs + part->offset, len);
+
+ ofs += part->offset;
+
+ if (mtd->flags & MTD_ERASE_PARTIAL) {
+ /* round up len to next erasesize and round down offset to prev block */
+ len = (mtd_div_by_eb(len, part->master) + 1) * part->master->erasesize;
+ ofs &= ~(part->master->erasesize - 1);
+ len = (mtd_div_by_eb(len, part->parent) + 1) * part->parent->erasesize;
+ ofs &= ~(part->parent->erasesize - 1);
+ }
+
+ return part->master->_unlock(part->master, ofs, len);
+ return part->parent->_unlock(part->parent, ofs, len);
}
static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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