mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 06:33:41 +00:00
95 lines
2.8 KiB
Diff
95 lines
2.8 KiB
Diff
From: Gabor Juhos <juhosg@openwrt.org>
|
|
Subject: kernel/3.10: add separate rootfs partition parser
|
|
|
|
lede-commit: daec7ad7688415156e2730e401503d09bd3acf91
|
|
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
|
|
---
|
|
drivers/mtd/mtdpart.c | 29 +++++++++++++++++++++++++++++
|
|
include/linux/mtd/mtd.h | 18 ++++++++++++++++++
|
|
include/linux/mtd/partitions.h | 2 ++
|
|
3 files changed, 49 insertions(+)
|
|
|
|
--- a/drivers/mtd/mtdpart.c
|
|
+++ b/drivers/mtd/mtdpart.c
|
|
@@ -779,6 +779,17 @@ run_parsers_by_type(struct mtd_part *sla
|
|
return nr_parts;
|
|
}
|
|
|
|
+static inline unsigned long
|
|
+mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
|
|
+{
|
|
+ unsigned long mask = mtd->erasesize - 1;
|
|
+
|
|
+ len += offset & mask;
|
|
+ len = (len + mask) & ~mask;
|
|
+ len -= offset & mask;
|
|
+ return len;
|
|
+}
|
|
+
|
|
#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
|
|
#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
|
|
#else
|
|
@@ -1232,6 +1243,24 @@ int mtd_is_partition(const struct mtd_in
|
|
}
|
|
EXPORT_SYMBOL_GPL(mtd_is_partition);
|
|
|
|
+struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd)
|
|
+{
|
|
+ if (!mtd_is_partition(mtd))
|
|
+ return (struct mtd_info *)mtd;
|
|
+
|
|
+ return mtd_to_part(mtd)->parent;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(mtdpart_get_master);
|
|
+
|
|
+uint64_t mtdpart_get_offset(const struct mtd_info *mtd)
|
|
+{
|
|
+ if (!mtd_is_partition(mtd))
|
|
+ return 0;
|
|
+
|
|
+ return mtd_to_part(mtd)->offset;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(mtdpart_get_offset);
|
|
+
|
|
/* Returns the size of the entire flash chip */
|
|
uint64_t mtd_get_device_size(const struct mtd_info *mtd)
|
|
{
|
|
--- a/include/linux/mtd/mtd.h
|
|
+++ b/include/linux/mtd/mtd.h
|
|
@@ -485,6 +485,24 @@ static inline uint32_t mtd_mod_by_eb(uin
|
|
return do_div(sz, mtd->erasesize);
|
|
}
|
|
|
|
+static inline uint64_t mtd_roundup_to_eb(uint64_t sz, struct mtd_info *mtd)
|
|
+{
|
|
+ if (mtd_mod_by_eb(sz, mtd) == 0)
|
|
+ return sz;
|
|
+
|
|
+ /* Round up to next erase block */
|
|
+ return (mtd_div_by_eb(sz, mtd) + 1) * mtd->erasesize;
|
|
+}
|
|
+
|
|
+static inline uint64_t mtd_rounddown_to_eb(uint64_t sz, struct mtd_info *mtd)
|
|
+{
|
|
+ if (mtd_mod_by_eb(sz, mtd) == 0)
|
|
+ return sz;
|
|
+
|
|
+ /* Round down to the start of the current erase block */
|
|
+ return (mtd_div_by_eb(sz, mtd)) * mtd->erasesize;
|
|
+}
|
|
+
|
|
static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
|
|
{
|
|
if (mtd->writesize_shift)
|
|
--- a/include/linux/mtd/partitions.h
|
|
+++ b/include/linux/mtd/partitions.h
|
|
@@ -115,6 +115,8 @@ 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);
|
|
+struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd);
|
|
+uint64_t mtdpart_get_offset(const struct mtd_info *mtd);
|
|
uint64_t mtd_get_device_size(const struct mtd_info *mtd);
|
|
extern void __weak arch_split_mtd_part(struct mtd_info *master,
|
|
const char *name, int offset, int size);
|