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u-boot-brain/drivers/mtd/ubispl/ubispl.c
Tom Rini 4549e789c1 SPDX: Convert all of our multiple license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have multiple licenses (in
these cases, dual license) declared in the SPDX-License-Identifier tag.
In this case we change from listing "LICENSE-A LICENSE-B" or "LICENSE-A
or LICENSE-B" or "(LICENSE-A OR LICENSE-B)" to "LICENSE-A OR LICENSE-B"
as per the Linux Kernel style document.  Note that parenthesis are
allowed so when they were used before we continue to use them.

Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 10:24:31 -04:00

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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (c) Thomas Gleixner <tglx@linutronix.de>
*
* The parts taken from the kernel implementation are:
*
* Copyright (c) International Business Machines Corp., 2006
*/
#include <common.h>
#include <errno.h>
#include <ubispl.h>
#include <linux/crc32.h>
#include "ubispl.h"
/**
* ubi_calc_fm_size - calculates the fastmap size in bytes for an UBI device.
* @ubi: UBI device description object
*/
static size_t ubi_calc_fm_size(struct ubi_scan_info *ubi)
{
size_t size;
size = sizeof(struct ubi_fm_sb) +
sizeof(struct ubi_fm_hdr) +
sizeof(struct ubi_fm_scan_pool) +
sizeof(struct ubi_fm_scan_pool) +
(ubi->peb_count * sizeof(struct ubi_fm_ec)) +
(sizeof(struct ubi_fm_eba) +
(ubi->peb_count * sizeof(__be32))) +
sizeof(struct ubi_fm_volhdr) * UBI_MAX_VOLUMES;
return roundup(size, ubi->leb_size);
}
static int ubi_io_read(struct ubi_scan_info *ubi, void *buf, int pnum,
unsigned long from, unsigned long len)
{
return ubi->read(pnum + ubi->peb_offset, from, len, buf);
}
static int ubi_io_is_bad(struct ubi_scan_info *ubi, int peb)
{
return peb >= ubi->peb_count || peb < 0;
}
static int ubi_io_read_vid_hdr(struct ubi_scan_info *ubi, int pnum,
struct ubi_vid_hdr *vh, int unused)
{
u32 magic;
int res;
/* No point in rescanning a corrupt block */
if (test_bit(pnum, ubi->corrupt))
return UBI_IO_BAD_HDR;
/*
* If the block has been scanned already, no need to rescan
*/
if (test_and_set_bit(pnum, ubi->scanned))
return 0;
res = ubi_io_read(ubi, vh, pnum, ubi->vid_offset, sizeof(*vh));
/*
* Bad block, unrecoverable ECC error, skip the block
*/
if (res) {
ubi_dbg("Skipping bad or unreadable block %d", pnum);
vh->magic = 0;
generic_set_bit(pnum, ubi->corrupt);
return res;
}
/* Magic number available ? */
magic = be32_to_cpu(vh->magic);
if (magic != UBI_VID_HDR_MAGIC) {
generic_set_bit(pnum, ubi->corrupt);
if (magic == 0xffffffff)
return UBI_IO_FF;
ubi_msg("Bad magic in block 0%d %08x", pnum, magic);
return UBI_IO_BAD_HDR;
}
/* Header CRC correct ? */
if (crc32(UBI_CRC32_INIT, vh, UBI_VID_HDR_SIZE_CRC) !=
be32_to_cpu(vh->hdr_crc)) {
ubi_msg("Bad CRC in block 0%d", pnum);
generic_set_bit(pnum, ubi->corrupt);
return UBI_IO_BAD_HDR;
}
ubi_dbg("RV: pnum: %i sqnum %llu", pnum, be64_to_cpu(vh->sqnum));
return 0;
}
static int ubi_rescan_fm_vid_hdr(struct ubi_scan_info *ubi,
struct ubi_vid_hdr *vh,
u32 fm_pnum, u32 fm_vol_id, u32 fm_lnum)
{
int res;
if (ubi_io_is_bad(ubi, fm_pnum))
return -EINVAL;
res = ubi_io_read_vid_hdr(ubi, fm_pnum, vh, 0);
if (!res) {
/* Check volume id, volume type and lnum */
if (be32_to_cpu(vh->vol_id) == fm_vol_id &&
vh->vol_type == UBI_VID_STATIC &&
be32_to_cpu(vh->lnum) == fm_lnum)
return 0;
ubi_dbg("RS: PEB %u vol: %u : %u typ %u lnum %u %u",
fm_pnum, fm_vol_id, vh->vol_type,
be32_to_cpu(vh->vol_id),
fm_lnum, be32_to_cpu(vh->lnum));
}
return res;
}
/* Insert the logic block into the volume info */
static int ubi_add_peb_to_vol(struct ubi_scan_info *ubi,
struct ubi_vid_hdr *vh, u32 vol_id,
u32 pnum, u32 lnum)
{
struct ubi_vol_info *vi = ubi->volinfo + vol_id;
u32 *ltp;
/*
* If the volume is larger than expected, yell and give up :(
*/
if (lnum >= UBI_MAX_VOL_LEBS) {
ubi_warn("Vol: %u LEB %d > %d", vol_id, lnum, UBI_MAX_VOL_LEBS);
return -EINVAL;
}
ubi_dbg("SC: Add PEB %u to Vol %u as LEB %u fnd %d sc %d",
pnum, vol_id, lnum, !!test_bit(lnum, vi->found),
!!test_bit(pnum, ubi->scanned));
/* Points to the translation entry */
ltp = vi->lebs_to_pebs + lnum;
/* If the block is already assigned, check sqnum */
if (__test_and_set_bit(lnum, vi->found)) {
u32 cur_pnum = *ltp;
struct ubi_vid_hdr *cur = ubi->blockinfo + cur_pnum;
/*
* If the current block hase not yet been scanned, we
* need to do that. The other block might be stale or
* the current block corrupted and the FM not yet
* updated.
*/
if (!test_bit(cur_pnum, ubi->scanned)) {
/*
* If the scan fails, we use the valid block
*/
if (ubi_rescan_fm_vid_hdr(ubi, cur, cur_pnum, vol_id,
lnum)) {
*ltp = pnum;
return 0;
}
}
/*
* Should not happen ....
*/
if (test_bit(cur_pnum, ubi->corrupt)) {
*ltp = pnum;
return 0;
}
ubi_dbg("Vol %u LEB %u PEB %u->sqnum %llu NPEB %u->sqnum %llu",
vol_id, lnum, cur_pnum, be64_to_cpu(cur->sqnum), pnum,
be64_to_cpu(vh->sqnum));
/*
* Compare sqnum and take the newer one
*/
if (be64_to_cpu(cur->sqnum) < be64_to_cpu(vh->sqnum))
*ltp = pnum;
} else {
*ltp = pnum;
if (lnum > vi->last_block)
vi->last_block = lnum;
}
return 0;
}
static int ubi_scan_vid_hdr(struct ubi_scan_info *ubi, struct ubi_vid_hdr *vh,
u32 pnum)
{
u32 vol_id, lnum;
int res;
if (ubi_io_is_bad(ubi, pnum))
return -EINVAL;
res = ubi_io_read_vid_hdr(ubi, pnum, vh, 0);
if (res)
return res;
/* Get volume id */
vol_id = be32_to_cpu(vh->vol_id);
/* If this is the fastmap anchor, return right away */
if (vol_id == UBI_FM_SB_VOLUME_ID)
return ubi->fm_enabled ? UBI_FASTMAP_ANCHOR : 0;
/* We only care about static volumes with an id < UBI_SPL_VOL_IDS */
if (vol_id >= UBI_SPL_VOL_IDS || vh->vol_type != UBI_VID_STATIC)
return 0;
/* We are only interested in the volumes to load */
if (!test_bit(vol_id, ubi->toload))
return 0;
lnum = be32_to_cpu(vh->lnum);
return ubi_add_peb_to_vol(ubi, vh, vol_id, pnum, lnum);
}
static int assign_aeb_to_av(struct ubi_scan_info *ubi, u32 pnum, u32 lnum,
u32 vol_id, u32 vol_type, u32 used)
{
struct ubi_vid_hdr *vh;
if (ubi_io_is_bad(ubi, pnum))
return -EINVAL;
ubi->fastmap_pebs++;
if (vol_id >= UBI_SPL_VOL_IDS || vol_type != UBI_STATIC_VOLUME)
return 0;
/* We are only interested in the volumes to load */
if (!test_bit(vol_id, ubi->toload))
return 0;
vh = ubi->blockinfo + pnum;
return ubi_scan_vid_hdr(ubi, vh, pnum);
}
static int scan_pool(struct ubi_scan_info *ubi, __be32 *pebs, int pool_size)
{
struct ubi_vid_hdr *vh;
u32 pnum;
int i;
ubi_dbg("Scanning pool size: %d", pool_size);
for (i = 0; i < pool_size; i++) {
pnum = be32_to_cpu(pebs[i]);
if (ubi_io_is_bad(ubi, pnum)) {
ubi_err("FM: Bad PEB in fastmap pool! %u", pnum);
return UBI_BAD_FASTMAP;
}
vh = ubi->blockinfo + pnum;
/*
* We allow the scan to fail here. The loader will notice
* and look for a replacement.
*/
ubi_scan_vid_hdr(ubi, vh, pnum);
}
return 0;
}
/*
* Fastmap code is stolen from Linux kernel and this stub structure is used
* to make it happy.
*/
struct ubi_attach_info {
int i;
};
static int ubi_attach_fastmap(struct ubi_scan_info *ubi,
struct ubi_attach_info *ai,
struct ubi_fastmap_layout *fm)
{
struct ubi_fm_hdr *fmhdr;
struct ubi_fm_scan_pool *fmpl1, *fmpl2;
struct ubi_fm_ec *fmec;
struct ubi_fm_volhdr *fmvhdr;
struct ubi_fm_eba *fm_eba;
int ret, i, j, pool_size, wl_pool_size;
size_t fm_pos = 0, fm_size = ubi->fm_size;
void *fm_raw = ubi->fm_buf;
memset(ubi->fm_used, 0, sizeof(ubi->fm_used));
fm_pos += sizeof(struct ubi_fm_sb);
if (fm_pos >= fm_size)
goto fail_bad;
fmhdr = (struct ubi_fm_hdr *)(fm_raw + fm_pos);
fm_pos += sizeof(*fmhdr);
if (fm_pos >= fm_size)
goto fail_bad;
if (be32_to_cpu(fmhdr->magic) != UBI_FM_HDR_MAGIC) {
ubi_err("bad fastmap header magic: 0x%x, expected: 0x%x",
be32_to_cpu(fmhdr->magic), UBI_FM_HDR_MAGIC);
goto fail_bad;
}
fmpl1 = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
fm_pos += sizeof(*fmpl1);
if (fm_pos >= fm_size)
goto fail_bad;
if (be32_to_cpu(fmpl1->magic) != UBI_FM_POOL_MAGIC) {
ubi_err("bad fastmap pool magic: 0x%x, expected: 0x%x",
be32_to_cpu(fmpl1->magic), UBI_FM_POOL_MAGIC);
goto fail_bad;
}
fmpl2 = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
fm_pos += sizeof(*fmpl2);
if (fm_pos >= fm_size)
goto fail_bad;
if (be32_to_cpu(fmpl2->magic) != UBI_FM_POOL_MAGIC) {
ubi_err("bad fastmap pool magic: 0x%x, expected: 0x%x",
be32_to_cpu(fmpl2->magic), UBI_FM_POOL_MAGIC);
goto fail_bad;
}
pool_size = be16_to_cpu(fmpl1->size);
wl_pool_size = be16_to_cpu(fmpl2->size);
fm->max_pool_size = be16_to_cpu(fmpl1->max_size);
fm->max_wl_pool_size = be16_to_cpu(fmpl2->max_size);
if (pool_size > UBI_FM_MAX_POOL_SIZE || pool_size < 0) {
ubi_err("bad pool size: %i", pool_size);
goto fail_bad;
}
if (wl_pool_size > UBI_FM_MAX_POOL_SIZE || wl_pool_size < 0) {
ubi_err("bad WL pool size: %i", wl_pool_size);
goto fail_bad;
}
if (fm->max_pool_size > UBI_FM_MAX_POOL_SIZE ||
fm->max_pool_size < 0) {
ubi_err("bad maximal pool size: %i", fm->max_pool_size);
goto fail_bad;
}
if (fm->max_wl_pool_size > UBI_FM_MAX_POOL_SIZE ||
fm->max_wl_pool_size < 0) {
ubi_err("bad maximal WL pool size: %i", fm->max_wl_pool_size);
goto fail_bad;
}
/* read EC values from free list */
for (i = 0; i < be32_to_cpu(fmhdr->free_peb_count); i++) {
fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
fm_pos += sizeof(*fmec);
if (fm_pos >= fm_size)
goto fail_bad;
}
/* read EC values from used list */
for (i = 0; i < be32_to_cpu(fmhdr->used_peb_count); i++) {
fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
fm_pos += sizeof(*fmec);
if (fm_pos >= fm_size)
goto fail_bad;
generic_set_bit(be32_to_cpu(fmec->pnum), ubi->fm_used);
}
/* read EC values from scrub list */
for (i = 0; i < be32_to_cpu(fmhdr->scrub_peb_count); i++) {
fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
fm_pos += sizeof(*fmec);
if (fm_pos >= fm_size)
goto fail_bad;
}
/* read EC values from erase list */
for (i = 0; i < be32_to_cpu(fmhdr->erase_peb_count); i++) {
fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
fm_pos += sizeof(*fmec);
if (fm_pos >= fm_size)
goto fail_bad;
}
/* Iterate over all volumes and read their EBA table */
for (i = 0; i < be32_to_cpu(fmhdr->vol_count); i++) {
u32 vol_id, vol_type, used, reserved;
fmvhdr = (struct ubi_fm_volhdr *)(fm_raw + fm_pos);
fm_pos += sizeof(*fmvhdr);
if (fm_pos >= fm_size)
goto fail_bad;
if (be32_to_cpu(fmvhdr->magic) != UBI_FM_VHDR_MAGIC) {
ubi_err("bad fastmap vol header magic: 0x%x, " \
"expected: 0x%x",
be32_to_cpu(fmvhdr->magic), UBI_FM_VHDR_MAGIC);
goto fail_bad;
}
vol_id = be32_to_cpu(fmvhdr->vol_id);
vol_type = fmvhdr->vol_type;
used = be32_to_cpu(fmvhdr->used_ebs);
fm_eba = (struct ubi_fm_eba *)(fm_raw + fm_pos);
fm_pos += sizeof(*fm_eba);
fm_pos += (sizeof(__be32) * be32_to_cpu(fm_eba->reserved_pebs));
if (fm_pos >= fm_size)
goto fail_bad;
if (be32_to_cpu(fm_eba->magic) != UBI_FM_EBA_MAGIC) {
ubi_err("bad fastmap EBA header magic: 0x%x, " \
"expected: 0x%x",
be32_to_cpu(fm_eba->magic), UBI_FM_EBA_MAGIC);
goto fail_bad;
}
reserved = be32_to_cpu(fm_eba->reserved_pebs);
ubi_dbg("FA: vol %u used %u res: %u", vol_id, used, reserved);
for (j = 0; j < reserved; j++) {
int pnum = be32_to_cpu(fm_eba->pnum[j]);
if ((int)be32_to_cpu(fm_eba->pnum[j]) < 0)
continue;
if (!__test_and_clear_bit(pnum, ubi->fm_used))
continue;
/*
* We only handle static volumes so used_ebs
* needs to be handed in. And we do not assign
* the reserved blocks
*/
if (j >= used)
continue;
ret = assign_aeb_to_av(ubi, pnum, j, vol_id,
vol_type, used);
if (!ret)
continue;
/*
* Nasty: The fastmap claims that the volume
* has one block more than it, but that block
* is always empty and the other blocks have
* the correct number of total LEBs in the
* headers. Deal with it.
*/
if (ret != UBI_IO_FF && j != used - 1)
goto fail_bad;
ubi_dbg("FA: Vol: %u Ignoring empty LEB %d of %d",
vol_id, j, used);
}
}
ret = scan_pool(ubi, fmpl1->pebs, pool_size);
if (ret)
goto fail;
ret = scan_pool(ubi, fmpl2->pebs, wl_pool_size);
if (ret)
goto fail;
#ifdef CHECKME
/*
* If fastmap is leaking PEBs (must not happen), raise a
* fat warning and fall back to scanning mode.
* We do this here because in ubi_wl_init() it's too late
* and we cannot fall back to scanning.
*/
if (WARN_ON(count_fastmap_pebs(ai) != ubi->peb_count -
ai->bad_peb_count - fm->used_blocks))
goto fail_bad;
#endif
return 0;
fail_bad:
ret = UBI_BAD_FASTMAP;
fail:
return ret;
}
static int ubi_scan_fastmap(struct ubi_scan_info *ubi,
struct ubi_attach_info *ai,
int fm_anchor)
{
struct ubi_fm_sb *fmsb, *fmsb2;
struct ubi_vid_hdr *vh;
struct ubi_fastmap_layout *fm;
int i, used_blocks, pnum, ret = 0;
size_t fm_size;
__be32 crc, tmp_crc;
unsigned long long sqnum = 0;
fmsb = &ubi->fm_sb;
fm = &ubi->fm_layout;
ret = ubi_io_read(ubi, fmsb, fm_anchor, ubi->leb_start, sizeof(*fmsb));
if (ret && ret != UBI_IO_BITFLIPS)
goto free_fm_sb;
else if (ret == UBI_IO_BITFLIPS)
fm->to_be_tortured[0] = 1;
if (be32_to_cpu(fmsb->magic) != UBI_FM_SB_MAGIC) {
ubi_err("bad super block magic: 0x%x, expected: 0x%x",
be32_to_cpu(fmsb->magic), UBI_FM_SB_MAGIC);
ret = UBI_BAD_FASTMAP;
goto free_fm_sb;
}
if (fmsb->version != UBI_FM_FMT_VERSION) {
ubi_err("bad fastmap version: %i, expected: %i",
fmsb->version, UBI_FM_FMT_VERSION);
ret = UBI_BAD_FASTMAP;
goto free_fm_sb;
}
used_blocks = be32_to_cpu(fmsb->used_blocks);
if (used_blocks > UBI_FM_MAX_BLOCKS || used_blocks < 1) {
ubi_err("number of fastmap blocks is invalid: %i", used_blocks);
ret = UBI_BAD_FASTMAP;
goto free_fm_sb;
}
fm_size = ubi->leb_size * used_blocks;
if (fm_size != ubi->fm_size) {
ubi_err("bad fastmap size: %zi, expected: %zi", fm_size,
ubi->fm_size);
ret = UBI_BAD_FASTMAP;
goto free_fm_sb;
}
vh = &ubi->fm_vh;
for (i = 0; i < used_blocks; i++) {
pnum = be32_to_cpu(fmsb->block_loc[i]);
if (ubi_io_is_bad(ubi, pnum)) {
ret = UBI_BAD_FASTMAP;
goto free_hdr;
}
#ifdef LATER
int image_seq;
ret = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
if (ret && ret != UBI_IO_BITFLIPS) {
ubi_err("unable to read fastmap block# %i EC (PEB: %i)",
i, pnum);
if (ret > 0)
ret = UBI_BAD_FASTMAP;
goto free_hdr;
} else if (ret == UBI_IO_BITFLIPS)
fm->to_be_tortured[i] = 1;
image_seq = be32_to_cpu(ech->image_seq);
if (!ubi->image_seq)
ubi->image_seq = image_seq;
/*
* Older UBI implementations have image_seq set to zero, so
* we shouldn't fail if image_seq == 0.
*/
if (image_seq && (image_seq != ubi->image_seq)) {
ubi_err("wrong image seq:%d instead of %d",
be32_to_cpu(ech->image_seq), ubi->image_seq);
ret = UBI_BAD_FASTMAP;
goto free_hdr;
}
#endif
ret = ubi_io_read_vid_hdr(ubi, pnum, vh, 0);
if (ret && ret != UBI_IO_BITFLIPS) {
ubi_err("unable to read fastmap block# %i (PEB: %i)",
i, pnum);
goto free_hdr;
}
/*
* Mainline code rescans the anchor header. We've done
* that already so we merily copy it over.
*/
if (pnum == fm_anchor)
memcpy(vh, ubi->blockinfo + pnum, sizeof(*fm));
if (i == 0) {
if (be32_to_cpu(vh->vol_id) != UBI_FM_SB_VOLUME_ID) {
ubi_err("bad fastmap anchor vol_id: 0x%x," \
" expected: 0x%x",
be32_to_cpu(vh->vol_id),
UBI_FM_SB_VOLUME_ID);
ret = UBI_BAD_FASTMAP;
goto free_hdr;
}
} else {
if (be32_to_cpu(vh->vol_id) != UBI_FM_DATA_VOLUME_ID) {
ubi_err("bad fastmap data vol_id: 0x%x," \
" expected: 0x%x",
be32_to_cpu(vh->vol_id),
UBI_FM_DATA_VOLUME_ID);
ret = UBI_BAD_FASTMAP;
goto free_hdr;
}
}
if (sqnum < be64_to_cpu(vh->sqnum))
sqnum = be64_to_cpu(vh->sqnum);
ret = ubi_io_read(ubi, ubi->fm_buf + (ubi->leb_size * i), pnum,
ubi->leb_start, ubi->leb_size);
if (ret && ret != UBI_IO_BITFLIPS) {
ubi_err("unable to read fastmap block# %i (PEB: %i, " \
"err: %i)", i, pnum, ret);
goto free_hdr;
}
}
fmsb2 = (struct ubi_fm_sb *)(ubi->fm_buf);
tmp_crc = be32_to_cpu(fmsb2->data_crc);
fmsb2->data_crc = 0;
crc = crc32(UBI_CRC32_INIT, ubi->fm_buf, fm_size);
if (crc != tmp_crc) {
ubi_err("fastmap data CRC is invalid");
ubi_err("CRC should be: 0x%x, calc: 0x%x", tmp_crc, crc);
ret = UBI_BAD_FASTMAP;
goto free_hdr;
}
fmsb2->sqnum = sqnum;
fm->used_blocks = used_blocks;
ret = ubi_attach_fastmap(ubi, ai, fm);
if (ret) {
if (ret > 0)
ret = UBI_BAD_FASTMAP;
goto free_hdr;
}
ubi->fm = fm;
ubi->fm_pool.max_size = ubi->fm->max_pool_size;
ubi->fm_wl_pool.max_size = ubi->fm->max_wl_pool_size;
ubi_msg("attached by fastmap %uMB %u blocks",
ubi->fsize_mb, ubi->peb_count);
ubi_dbg("fastmap pool size: %d", ubi->fm_pool.max_size);
ubi_dbg("fastmap WL pool size: %d", ubi->fm_wl_pool.max_size);
out:
if (ret)
ubi_err("Attach by fastmap failed, doing a full scan!");
return ret;
free_hdr:
free_fm_sb:
goto out;
}
/*
* Scan the flash and attempt to attach via fastmap
*/
static void ipl_scan(struct ubi_scan_info *ubi)
{
unsigned int pnum;
int res;
/*
* Scan first for the fastmap super block
*/
for (pnum = 0; pnum < UBI_FM_MAX_START; pnum++) {
res = ubi_scan_vid_hdr(ubi, ubi->blockinfo + pnum, pnum);
/*
* We ignore errors here as we are meriliy scanning
* the headers.
*/
if (res != UBI_FASTMAP_ANCHOR)
continue;
/*
* If fastmap is disabled, continue scanning. This
* might happen because the previous attempt failed or
* the caller disabled it right away.
*/
if (!ubi->fm_enabled)
continue;
/*
* Try to attach the fastmap, if that fails continue
* scanning.
*/
if (!ubi_scan_fastmap(ubi, NULL, pnum))
return;
/*
* Fastmap failed. Clear everything we have and start
* over. We are paranoid and do not trust anything.
*/
memset(ubi->volinfo, 0, sizeof(ubi->volinfo));
pnum = 0;
break;
}
/*
* Continue scanning, ignore errors, we might find what we are
* looking for,
*/
for (; pnum < ubi->peb_count; pnum++)
ubi_scan_vid_hdr(ubi, ubi->blockinfo + pnum, pnum);
}
/*
* Load a logical block of a volume into memory
*/
static int ubi_load_block(struct ubi_scan_info *ubi, uint8_t *laddr,
struct ubi_vol_info *vi, u32 vol_id, u32 lnum,
u32 last)
{
struct ubi_vid_hdr *vh, *vrepl;
u32 pnum, crc, dlen;
retry:
/*
* If this is a fastmap run, we try to rescan full, otherwise
* we simply give up.
*/
if (!test_bit(lnum, vi->found)) {
ubi_warn("LEB %d of %d is missing", lnum, last);
return -EINVAL;
}
pnum = vi->lebs_to_pebs[lnum];
ubi_dbg("Load vol %u LEB %u PEB %u", vol_id, lnum, pnum);
if (ubi_io_is_bad(ubi, pnum)) {
ubi_warn("Corrupted mapping block %d PB %d\n", lnum, pnum);
return -EINVAL;
}
if (test_bit(pnum, ubi->corrupt))
goto find_other;
/*
* Lets try to read that block
*/
vh = ubi->blockinfo + pnum;
if (!test_bit(pnum, ubi->scanned)) {
ubi_warn("Vol: %u LEB %u PEB %u not yet scanned", vol_id,
lnum, pnum);
if (ubi_rescan_fm_vid_hdr(ubi, vh, pnum, vol_id, lnum))
goto find_other;
}
/*
* Check, if the total number of blocks is correct
*/
if (be32_to_cpu(vh->used_ebs) != last) {
ubi_dbg("Block count missmatch.");
ubi_dbg("vh->used_ebs: %d nrblocks: %d",
be32_to_cpu(vh->used_ebs), last);
generic_set_bit(pnum, ubi->corrupt);
goto find_other;
}
/*
* Get the data length of this block.
*/
dlen = be32_to_cpu(vh->data_size);
/*
* Read the data into RAM. We ignore the return value
* here as the only thing which might go wrong are
* bitflips. Try nevertheless.
*/
ubi_io_read(ubi, laddr, pnum, ubi->leb_start, dlen);
/* Calculate CRC over the data */
crc = crc32(UBI_CRC32_INIT, laddr, dlen);
if (crc != be32_to_cpu(vh->data_crc)) {
ubi_warn("Vol: %u LEB %u PEB %u data CRC failure", vol_id,
lnum, pnum);
generic_set_bit(pnum, ubi->corrupt);
goto find_other;
}
/* We are good. Return the data length we read */
return dlen;
find_other:
ubi_dbg("Find replacement for LEB %u PEB %u", lnum, pnum);
generic_clear_bit(lnum, vi->found);
vrepl = NULL;
for (pnum = 0; pnum < ubi->peb_count; pnum++) {
struct ubi_vid_hdr *tmp = ubi->blockinfo + pnum;
u32 t_vol_id = be32_to_cpu(tmp->vol_id);
u32 t_lnum = be32_to_cpu(tmp->lnum);
if (test_bit(pnum, ubi->corrupt))
continue;
if (t_vol_id != vol_id || t_lnum != lnum)
continue;
if (!test_bit(pnum, ubi->scanned)) {
ubi_warn("Vol: %u LEB %u PEB %u not yet scanned",
vol_id, lnum, pnum);
if (ubi_rescan_fm_vid_hdr(ubi, tmp, pnum, vol_id, lnum))
continue;
}
/*
* We found one. If its the first, assign it otherwise
* compare the sqnum
*/
generic_set_bit(lnum, vi->found);
if (!vrepl) {
vrepl = tmp;
continue;
}
if (be64_to_cpu(vrepl->sqnum) < be64_to_cpu(tmp->sqnum))
vrepl = tmp;
}
if (vrepl) {
/* Update the vi table */
pnum = vrepl - ubi->blockinfo;
vi->lebs_to_pebs[lnum] = pnum;
ubi_dbg("Trying PEB %u for LEB %u", pnum, lnum);
vh = vrepl;
}
goto retry;
}
/*
* Load a volume into RAM
*/
static int ipl_load(struct ubi_scan_info *ubi, const u32 vol_id, uint8_t *laddr)
{
struct ubi_vol_info *vi;
u32 lnum, last, len;
if (vol_id >= UBI_SPL_VOL_IDS)
return -EINVAL;
len = 0;
vi = ubi->volinfo + vol_id;
last = vi->last_block + 1;
/* Read the blocks to RAM, check CRC */
for (lnum = 0 ; lnum < last; lnum++) {
int res = ubi_load_block(ubi, laddr, vi, vol_id, lnum, last);
if (res < 0) {
ubi_warn("Failed to load volume %u", vol_id);
return res;
}
/* res is the data length of the read block */
laddr += res;
len += res;
}
return len;
}
int ubispl_load_volumes(struct ubispl_info *info, struct ubispl_load *lvols,
int nrvols)
{
struct ubi_scan_info *ubi = info->ubi;
int res, i, fastmap = info->fastmap;
u32 fsize;
retry:
/*
* We do a partial initializiation of @ubi. Cleaning fm_buf is
* not necessary.
*/
memset(ubi, 0, offsetof(struct ubi_scan_info, fm_buf));
ubi->read = info->read;
/* Precalculate the offsets */
ubi->vid_offset = info->vid_offset;
ubi->leb_start = info->leb_start;
ubi->leb_size = info->peb_size - ubi->leb_start;
ubi->peb_count = info->peb_count;
ubi->peb_offset = info->peb_offset;
fsize = info->peb_size * info->peb_count;
ubi->fsize_mb = fsize >> 20;
/* Fastmap init */
ubi->fm_size = ubi_calc_fm_size(ubi);
ubi->fm_enabled = fastmap;
for (i = 0; i < nrvols; i++) {
struct ubispl_load *lv = lvols + i;
generic_set_bit(lv->vol_id, ubi->toload);
}
ipl_scan(ubi);
for (i = 0; i < nrvols; i++) {
struct ubispl_load *lv = lvols + i;
ubi_msg("Loading VolId #%d", lv->vol_id);
res = ipl_load(ubi, lv->vol_id, lv->load_addr);
if (res < 0) {
if (fastmap) {
fastmap = 0;
goto retry;
}
ubi_warn("Failed");
return res;
}
}
return 0;
}
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