mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-13 16:37:30 +00:00
7c4213f6a5
This will allow the implementation to make use of data in the block_dev structure beyond the base device number. This will be useful so that eMMC block devices can encompass the HW partition ID rather than treating this out-of-band. Equally, the existence of the priv field is crying out for this patch to exist. Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Tom Rini <trini@konsulko.com>
146 lines
3.9 KiB
C
146 lines
3.9 KiB
C
/*
|
|
* (C) Copyright 2011 - 2012 Samsung Electronics
|
|
* EXT4 filesystem implementation in Uboot by
|
|
* Uma Shankar <uma.shankar@samsung.com>
|
|
* Manjunatha C Achar <a.manjunatha@samsung.com>
|
|
*
|
|
* made from existing ext2/dev.c file of Uboot
|
|
* (C) Copyright 2004
|
|
* esd gmbh <www.esd-electronics.com>
|
|
* Reinhard Arlt <reinhard.arlt@esd-electronics.com>
|
|
*
|
|
* based on code of fs/reiserfs/dev.c by
|
|
*
|
|
* (C) Copyright 2003 - 2004
|
|
* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
/*
|
|
* Changelog:
|
|
* 0.1 - Newly created file for ext4fs support. Taken from
|
|
* fs/ext2/dev.c file in uboot.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <memalign.h>
|
|
#include <ext4fs.h>
|
|
#include <ext_common.h>
|
|
#include "ext4_common.h"
|
|
|
|
lbaint_t part_offset;
|
|
|
|
static block_dev_desc_t *ext4fs_block_dev_desc;
|
|
static disk_partition_t *part_info;
|
|
|
|
void ext4fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
|
|
{
|
|
assert(rbdd->blksz == (1 << rbdd->log2blksz));
|
|
ext4fs_block_dev_desc = rbdd;
|
|
get_fs()->dev_desc = rbdd;
|
|
part_info = info;
|
|
part_offset = info->start;
|
|
get_fs()->total_sect = ((uint64_t)info->size * info->blksz) >>
|
|
get_fs()->dev_desc->log2blksz;
|
|
}
|
|
|
|
int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len, char *buf)
|
|
{
|
|
unsigned block_len;
|
|
int log2blksz = ext4fs_block_dev_desc->log2blksz;
|
|
ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, (ext4fs_block_dev_desc ?
|
|
ext4fs_block_dev_desc->blksz :
|
|
0));
|
|
if (ext4fs_block_dev_desc == NULL) {
|
|
printf("** Invalid Block Device Descriptor (NULL)\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Check partition boundaries */
|
|
if ((sector < 0) ||
|
|
((sector + ((byte_offset + byte_len - 1) >> log2blksz))
|
|
>= part_info->size)) {
|
|
printf("%s read outside partition " LBAFU "\n", __func__,
|
|
sector);
|
|
return 0;
|
|
}
|
|
|
|
/* Get the read to the beginning of a partition */
|
|
sector += byte_offset >> log2blksz;
|
|
byte_offset &= ext4fs_block_dev_desc->blksz - 1;
|
|
|
|
debug(" <" LBAFU ", %d, %d>\n", sector, byte_offset, byte_len);
|
|
|
|
if (byte_offset != 0) {
|
|
int readlen;
|
|
/* read first part which isn't aligned with start of sector */
|
|
if (ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc,
|
|
part_info->start + sector,
|
|
1, (void *)sec_buf)
|
|
!= 1) {
|
|
printf(" ** ext2fs_devread() read error **\n");
|
|
return 0;
|
|
}
|
|
readlen = min((int)ext4fs_block_dev_desc->blksz - byte_offset,
|
|
byte_len);
|
|
memcpy(buf, sec_buf + byte_offset, readlen);
|
|
buf += readlen;
|
|
byte_len -= readlen;
|
|
sector++;
|
|
}
|
|
|
|
if (byte_len == 0)
|
|
return 1;
|
|
|
|
/* read sector aligned part */
|
|
block_len = byte_len & ~(ext4fs_block_dev_desc->blksz - 1);
|
|
|
|
if (block_len == 0) {
|
|
ALLOC_CACHE_ALIGN_BUFFER(u8, p, ext4fs_block_dev_desc->blksz);
|
|
|
|
block_len = ext4fs_block_dev_desc->blksz;
|
|
ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc,
|
|
part_info->start + sector,
|
|
1, (void *)p);
|
|
memcpy(buf, p, byte_len);
|
|
return 1;
|
|
}
|
|
|
|
if (ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc,
|
|
part_info->start + sector,
|
|
block_len >> log2blksz,
|
|
(void *)buf) !=
|
|
block_len >> log2blksz) {
|
|
printf(" ** %s read error - block\n", __func__);
|
|
return 0;
|
|
}
|
|
block_len = byte_len & ~(ext4fs_block_dev_desc->blksz - 1);
|
|
buf += block_len;
|
|
byte_len -= block_len;
|
|
sector += block_len / ext4fs_block_dev_desc->blksz;
|
|
|
|
if (byte_len != 0) {
|
|
/* read rest of data which are not in whole sector */
|
|
if (ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc,
|
|
part_info->start + sector,
|
|
1, (void *)sec_buf)
|
|
!= 1) {
|
|
printf("* %s read error - last part\n", __func__);
|
|
return 0;
|
|
}
|
|
memcpy(buf, sec_buf, byte_len);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int ext4_read_superblock(char *buffer)
|
|
{
|
|
struct ext_filesystem *fs = get_fs();
|
|
int sect = SUPERBLOCK_START >> fs->dev_desc->log2blksz;
|
|
int off = SUPERBLOCK_START % fs->dev_desc->blksz;
|
|
|
|
return ext4fs_devread(sect, off, SUPERBLOCK_SIZE,
|
|
buffer);
|
|
}
|