mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 18:28:55 +00:00
61143f741e
Fix diacritics in some instances of my name and change my e-mail address to kabel@kernel.org. Add corresponding .mailmap entries. Signed-off-by: Marek Behún <kabel@kernel.org> Reviewed-by: Stefan Roese <sr@denx.de>
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 2017 by Marek Behún <kabel@kernel.org>
|
|
*
|
|
* Derived from code in ext4/dev.c, which was based on reiserfs/dev.c
|
|
*/
|
|
|
|
#define LOG_CATEGORY LOGC_CORE
|
|
|
|
#include <common.h>
|
|
#include <blk.h>
|
|
#include <compiler.h>
|
|
#include <log.h>
|
|
#include <part.h>
|
|
#include <memalign.h>
|
|
|
|
int fs_devread(struct blk_desc *blk, struct disk_partition *partition,
|
|
lbaint_t sector, int byte_offset, int byte_len, char *buf)
|
|
{
|
|
unsigned block_len;
|
|
int log2blksz;
|
|
ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, (blk ? blk->blksz : 0));
|
|
if (blk == NULL) {
|
|
log_err("** Invalid Block Device Descriptor (NULL)\n");
|
|
return 0;
|
|
}
|
|
log2blksz = blk->log2blksz;
|
|
|
|
/* Check partition boundaries */
|
|
if ((sector + ((byte_offset + byte_len - 1) >> log2blksz))
|
|
>= partition->size) {
|
|
log_err("%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 &= blk->blksz - 1;
|
|
|
|
log_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 (blk_dread(blk, partition->start + sector, 1,
|
|
(void *)sec_buf) != 1) {
|
|
log_err(" ** %s read error **\n", __func__);
|
|
return 0;
|
|
}
|
|
readlen = min((int)blk->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 & ~(blk->blksz - 1);
|
|
|
|
if (block_len == 0) {
|
|
ALLOC_CACHE_ALIGN_BUFFER(u8, p, blk->blksz);
|
|
|
|
block_len = blk->blksz;
|
|
blk_dread(blk, partition->start + sector, 1,
|
|
(void *)p);
|
|
memcpy(buf, p, byte_len);
|
|
return 1;
|
|
}
|
|
|
|
if (blk_dread(blk, partition->start + sector,
|
|
block_len >> log2blksz, (void *)buf) !=
|
|
block_len >> log2blksz) {
|
|
log_err(" ** %s read error - block\n", __func__);
|
|
return 0;
|
|
}
|
|
block_len = byte_len & ~(blk->blksz - 1);
|
|
buf += block_len;
|
|
byte_len -= block_len;
|
|
sector += block_len / blk->blksz;
|
|
|
|
if (byte_len != 0) {
|
|
/* read rest of data which are not in whole sector */
|
|
if (blk_dread(blk, partition->start + sector, 1,
|
|
(void *)sec_buf) != 1) {
|
|
log_err("* %s read error - last part\n", __func__);
|
|
return 0;
|
|
}
|
|
memcpy(buf, sec_buf, byte_len);
|
|
}
|
|
return 1;
|
|
}
|