blob: 90a7c4c6f9e08552d68a54afbe6d423a4a345de0 [file] [log] [blame]
// 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 <errno.h>
#include <linux/bug.h>
#include <u-boot/crc.h>
#include <ubispl.h>
#include <linux/bitops.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;
}
#ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME
/**
* ubi_dump_vtbl_record - dump a &struct ubi_vtbl_record object.
* @r: the object to dump
* @idx: volume table index
*/
void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx)
{
int name_len = be16_to_cpu(r->name_len);
ubi_dbg("Volume table record %d dump: size: %d",
idx, sizeof(struct ubi_vtbl_record));
ubi_dbg("\treserved_pebs %d", be32_to_cpu(r->reserved_pebs));
ubi_dbg("\talignment %d", be32_to_cpu(r->alignment));
ubi_dbg("\tdata_pad %d", be32_to_cpu(r->data_pad));
ubi_dbg("\tvol_type %d", (int)r->vol_type);
ubi_dbg("\tupd_marker %d", (int)r->upd_marker);
ubi_dbg("\tname_len %d", name_len);
if (r->name[0] == '\0') {
ubi_dbg("\tname NULL");
return;
}
if (name_len <= UBI_VOL_NAME_MAX &&
strnlen(&r->name[0], name_len + 1) == name_len) {
ubi_dbg("\tname %s", &r->name[0]);
} else {
ubi_dbg("\t1st 5 characters of name: %c%c%c%c%c",
r->name[0], r->name[1], r->name[2], r->name[3],
r->name[4]);
}
ubi_dbg("\tcrc %#08x", be32_to_cpu(r->crc));
}
/* Empty volume table record */
static struct ubi_vtbl_record empty_vtbl_record;
/**
* vtbl_check - check if volume table is not corrupted and sensible.
* @ubi: UBI device description object
* @vtbl: volume table
*
* This function returns zero if @vtbl is all right, %1 if CRC is incorrect,
* and %-EINVAL if it contains inconsistent data.
*/
static int vtbl_check(struct ubi_scan_info *ubi,
struct ubi_vtbl_record *vtbl)
{
int i, n, reserved_pebs, alignment, data_pad, vol_type, name_len;
int upd_marker, err;
uint32_t crc;
const char *name;
for (i = 0; i < UBI_SPL_VOL_IDS; i++) {
reserved_pebs = be32_to_cpu(vtbl[i].reserved_pebs);
alignment = be32_to_cpu(vtbl[i].alignment);
data_pad = be32_to_cpu(vtbl[i].data_pad);
upd_marker = vtbl[i].upd_marker;
vol_type = vtbl[i].vol_type;
name_len = be16_to_cpu(vtbl[i].name_len);
name = &vtbl[i].name[0];
crc = crc32(UBI_CRC32_INIT, &vtbl[i], UBI_VTBL_RECORD_SIZE_CRC);
if (be32_to_cpu(vtbl[i].crc) != crc) {
ubi_err("bad CRC at record %u: %#08x, not %#08x",
i, crc, be32_to_cpu(vtbl[i].crc));
ubi_dump_vtbl_record(&vtbl[i], i);
return 1;
}
if (reserved_pebs == 0) {
if (memcmp(&vtbl[i], &empty_vtbl_record,
UBI_VTBL_RECORD_SIZE)) {
err = 2;
goto bad;
}
continue;
}
if (reserved_pebs < 0 || alignment < 0 || data_pad < 0 ||
name_len < 0) {
err = 3;
goto bad;
}
if (alignment > ubi->leb_size || alignment == 0) {
err = 4;
goto bad;
}
n = alignment & (CONFIG_SPL_UBI_VID_OFFSET - 1);
if (alignment != 1 && n) {
err = 5;
goto bad;
}
n = ubi->leb_size % alignment;
if (data_pad != n) {
ubi_err("bad data_pad, has to be %d", n);
err = 6;
goto bad;
}
if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) {
err = 7;
goto bad;
}
if (upd_marker != 0 && upd_marker != 1) {
err = 8;
goto bad;
}
if (name_len > UBI_VOL_NAME_MAX) {
err = 10;
goto bad;
}
if (name[0] == '\0') {
err = 11;
goto bad;
}
if (name_len != strnlen(name, name_len + 1)) {
err = 12;
goto bad;
}
ubi_dump_vtbl_record(&vtbl[i], i);
}
/* Checks that all names are unique */
for (i = 0; i < UBI_SPL_VOL_IDS - 1; i++) {
for (n = i + 1; n < UBI_SPL_VOL_IDS; n++) {
int len1 = be16_to_cpu(vtbl[i].name_len);
int len2 = be16_to_cpu(vtbl[n].name_len);
if (len1 > 0 && len1 == len2 &&
!strncmp(vtbl[i].name, vtbl[n].name, len1)) {
ubi_err("volumes %d and %d have the same name \"%s\"",
i, n, vtbl[i].name);
ubi_dump_vtbl_record(&vtbl[i], i);
ubi_dump_vtbl_record(&vtbl[n], n);
return -EINVAL;
}
}
}
return 0;
bad:
ubi_err("volume table check failed: record %d, error %d", i, err);
ubi_dump_vtbl_record(&vtbl[i], i);
return -EINVAL;
}
static int ubi_read_volume_table(struct ubi_scan_info *ubi, u32 pnum)
{
int err = -EINVAL;
empty_vtbl_record.crc = cpu_to_be32(0xf116c36b);
err = ubi_io_read(ubi, &ubi->vtbl, pnum, ubi->leb_start,
sizeof(struct ubi_vtbl_record) * UBI_SPL_VOL_IDS);
if (err && err != UBI_IO_BITFLIPS) {
ubi_err("unable to read volume table");
goto out;
}
if (!vtbl_check(ubi, ubi->vtbl)) {
ubi->vtbl_valid = 1;
err = 0;
}
out:
return err;
}
#endif /* CONFIG_SPL_UBI_LOAD_BY_VOLNAME */
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;
#ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME
/* If this is a UBI volume table, read it and return */
if (vol_id == UBI_LAYOUT_VOLUME_ID && !ubi->vtbl_valid) {
res = ubi_read_volume_table(ubi, pnum);
return res;
}
#endif
/* 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;
#ifndef CONFIG_SPL_UBI_LOAD_BY_VOLNAME
/* We are only interested in the volumes to load */
if (!test_bit(vol_id, ubi->toload))
return 0;
#endif
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++;
#ifndef CONFIG_SPL_UBI_LOAD_BY_VOLNAME
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;
#endif
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 mismatch.");
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;
#ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME
ubi->vtbl_valid = 0;
#endif
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;
#ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME
if (lv->vol_id == -1) {
for (int j = 0; j < UBI_SPL_VOL_IDS; j++) {
int len = be16_to_cpu(ubi->vtbl[j].name_len);
if (strncmp(lv->name,
ubi->vtbl[j].name,
len) == 0) {
lv->vol_id = j;
break;
}
}
}
ubi_msg("Loading VolName %s (VolId #%d)", lv->name, lv->vol_id);
#else
ubi_msg("Loading VolId #%d", lv->vol_id);
#endif
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;
}