From: Thomas Gleixner tglx@linutronix.de
This is an update of Thomas's patch: https://patchwork.ozlabs.org/patch/367306/ patch still depends on spl_nand_simple implementation: https://patchwork.ozlabs.org/patch/367305/
Changes from original version: - fixes ubi_calc_fm_size to include also sizeof(struct ubi_fm_sb) - dropped private copy of ubi-media.h - accomodate for actual Makefile
As original patch is more that a year old, should we update to current linux fastmap code?
Signed-off-by: Thomas Gleixner tglx@linutronix.de Signed-off-by: Ladislav Michl ladis@linux-mips.org --- README | 4 + doc/README.ubispl | 144 ++++++ drivers/Makefile | 3 +- drivers/mtd/ubispl/Makefile | 1 + drivers/mtd/ubispl/ubi-wrapper.h | 104 +++++ drivers/mtd/ubispl/ubispl.c | 921 +++++++++++++++++++++++++++++++++++++++ drivers/mtd/ubispl/ubispl.h | 136 ++++++ include/ubispl.h | 90 ++++ 8 files changed, 1402 insertions(+), 1 deletion(-) create mode 100644 doc/README.ubispl create mode 100644 drivers/mtd/ubispl/Makefile create mode 100644 drivers/mtd/ubispl/ubi-wrapper.h create mode 100644 drivers/mtd/ubispl/ubispl.c create mode 100644 drivers/mtd/ubispl/ubispl.h create mode 100644 include/ubispl.h
diff --git a/README b/README index 43f307f..b6d01a9 100644 --- a/README +++ b/README @@ -3654,6 +3654,10 @@ FIT uImage format: Support for NAND boot using simple NAND drivers that expose the cmd_ctrl() interface.
+ CONFIG_SPL_UBI + Support for a lightweight UBI (fastmap) scanner and + loader + CONFIG_SPL_MTD_SUPPORT Support for the MTD subsystem within SPL. Useful for environment on NAND support within SPL. diff --git a/doc/README.ubispl b/doc/README.ubispl new file mode 100644 index 0000000..f90e0a1 --- /dev/null +++ b/doc/README.ubispl @@ -0,0 +1,144 @@ +Lightweight UBI and UBI fastmap support + +# Copyright (C) Thomas Gleixner tglx@linutronix.de +# +# SPDX-License-Identifier: GPL-2.0+ + +Scans the UBI information and loads the requested static volumes into +memory. + +Configuration Options: + + CONFIG_SPL_UBI + Enables the SPL UBI support + + CONFIG_SPL_UBI_MAX_VOL_LEBS + The maximum number of logical eraseblocks which a static volume + to load can contain. Used for sizing the scan data structure + + CONFIG_SPL_UBI_MAX_PEB_SIZE + The maximum physical erase block size. Either a compile time + constant or runtime detection. Used for sizing the scan data + structure + + CONFIG_SPL_UBI_MAX_PEBS + The maximum physical erase block count. Either a compile time + constant or runtime detection. Used for sizing the scan data + structure + + CONFIG_SPL_UBI_VOL_IDS + The maximum volume ids which can be loaded. Used for sizing the + scan data structure. + +Usage notes: + +In the board config file define for example: + +#define CONFIG_SPL_UBI +#define CONFIG_SPL_UBI_MAX_VOL_LEBS 256 +#define CONFIG_SPL_UBI_MAX_PEB_SIZE (256*1024) +#define CONFIG_SPL_UBI_MAX_PEBS 4096 +#define CONFIG_SPL_UBI_VOL_IDS 8 + +The size requirement is roughly as follows: + + 2k for the basic data structure + + CONFIG_SPL_UBI_VOL_IDS * CONFIG_SPL_UBI_MAX_VOL_LEBS * 8 + + CONFIG_SPL_UBI_MAX_PEBS * 64 + + CONFIG_SPL_UBI_MAX_PEB_SIZE * UBI_FM_MAX_BLOCKS + +The last one is big, but I really don't care in that stage. Real world +implementations only use the first couple of blocks, but the code +handles up to UBI_FM_MAX_BLOCKS. + +Given the above configuration example the requirement is about 5M +which is usually not a problem to reserve in the RAM along with the +other areas like the kernel/dts load address. + +So something like this will do the trick: + +#define SPL_FINFO_ADDR 0x80800000 +#define SPL_DTB_LOAD_ADDR 0x81800000 +#define SPL_KERNEL_LOAD_ADDR 0x82000000 + +In the board file, implement the following: + +static struct ubispl_load myvolumes[] = { + { + .name = "Kernel", + .vol_id = 0, + .load_addr = (void *)SPL_KERNEL_LOAD_ADDR, + }, + { + .name = "DTB", + .vol_id = 1, + .load_addr = (void *)SPL_DTB_LOAD_ADDR, + } +}; + +int spl_start_uboot(void) +{ + struct ubispl_info info; + + info.ubi = (struct ubi_scan_info *) SPL_FINFO_ADDR; + info.fastmap = 1; + info.read = nand_spl_read_flash; + +#if COMPILE_TIME_DEFINED + /* + * MY_NAND_NR_SPL_PEBS is the number of physical erase blocks + * in the FLASH which are reserved for the SPL. Think about + * mtd partitions: + * + * part_spl { .start = 0, .end = 4 } + * part_ubi { .start = 4, .end = NR_PEBS } + */ + info.peb_offset = MY_NAND_NR_SPL_PEBS; + info.peb_size = CONFIG_SYS_NAND_BLOCK_SIZE; + info.vid_offset = MY_NAND_UBI_VID_OFFS; + info.leb_start = MY_NAND_UBI_DATA_OFFS; + info.peb_count = MY_NAND_UBI_NUM_PEBS; +#else + get_flash_info(&flash_info); + info.peb_offset = MY_NAND_NR_SPL_PEBS; + info.peb_size = flash_info.peb_size; + + /* + * The VID and Data offset depend on the capability of the + * FLASH chip to do subpage writes. + * + * If the flash chip supports subpage writes, then the VID + * header starts at the second subpage. So for 2k pages size + * with 4 subpages the VID offset is 512. The DATA offset is 2k. + * + * If the flash chip does not support subpage writes then the + * VID offset is FLASH_PAGE_SIZE and the DATA offset + * 2 * FLASH_PAGE_SIZE + */ + info.vid_offset = flash_info.vid_offset; + info.leb_start = flash_info.data_offset; + + /* + * The flash reports the total number of erase blocks, so + * we need to subtract the number of blocks which are reserved + * for the SPL itself and not managed by UBI. + */ + info.peb_count = flash_info.peb_count - MY_NAND_NR_SPL_PEBS; +#endif + + ret = ubispl_load_volumes(&info, myvolumes, ARRAY_SIZE(myvolumes); + + .... + +} + +Note: you can load any payload that way. You can even load u-boot from +UBI, so the only non UBI managed FLASH area is the one which is +reserved for the SPL itself and read from the SoC ROM. + +And you can do fallback scenarios: + + if (ubispl_load_volumes(&info, volumes0, ARRAY_SIZE(volumes0))) + if (ubispl_load_volumes(&info, volumes1, ARRAY_SIZE(volumes1))) + ubispl_load_volumes(&info, vol_uboot, ARRAY_SIZE(vol_uboot)); + diff --git a/drivers/Makefile b/drivers/Makefile index c9031f2..e0bcb52 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -22,10 +22,11 @@ obj-$(CONFIG_SPL_SPI_FLASH_SUPPORT) += mtd/spi/ obj-$(CONFIG_SPL_SPI_SUPPORT) += spi/ obj-$(CONFIG_SPL_POWER_SUPPORT) += power/ power/pmic/ obj-$(CONFIG_SPL_POWER_SUPPORT) += power/regulator/ +obj-$(CONFIG_SPL_DRIVERS_MISC_SUPPORT) += misc/ obj-$(CONFIG_SPL_MTD_SUPPORT) += mtd/ obj-$(CONFIG_SPL_NAND_SUPPORT) += mtd/nand/ -obj-$(CONFIG_SPL_DRIVERS_MISC_SUPPORT) += misc/ obj-$(CONFIG_SPL_ONENAND_SUPPORT) += mtd/onenand/ +obj-$(CONFIG_SPL_UBI) += mtd/ubispl/ obj-$(CONFIG_SPL_DMA_SUPPORT) += dma/ obj-$(CONFIG_SPL_ETH_SUPPORT) += net/ obj-$(CONFIG_SPL_ETH_SUPPORT) += net/phy/ diff --git a/drivers/mtd/ubispl/Makefile b/drivers/mtd/ubispl/Makefile new file mode 100644 index 0000000..740dbed --- /dev/null +++ b/drivers/mtd/ubispl/Makefile @@ -0,0 +1 @@ +obj-y += ubispl.o ../ubi/crc32.o diff --git a/drivers/mtd/ubispl/ubi-wrapper.h b/drivers/mtd/ubispl/ubi-wrapper.h new file mode 100644 index 0000000..dd76e6b --- /dev/null +++ b/drivers/mtd/ubispl/ubi-wrapper.h @@ -0,0 +1,104 @@ +/* + * The parts taken from the kernel implementation are: + * + * Copyright (c) International Business Machines Corp., 2006 + * + * UBISPL specific wrappers and defines: + * + * Copyright (c) Thomas Gleixner tglx@linutronix.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * Contains various defines, wrappers to make the upstream fastboot + * code happy. + */ +#ifndef __UBOOT_UBI_WRAPPER_H +#define __UBOOT_UBI_WRAPPER_H + +/* + * Error codes returned by the I/O sub-system. + * + * UBI_IO_FF: the read region of flash contains only 0xFFs + * UBI_IO_FF_BITFLIPS: the same as %UBI_IO_FF, but also also there was a data + * integrity error reported by the MTD driver + * (uncorrectable ECC error in case of NAND) + * UBI_IO_BAD_HDR: the EC or VID header is corrupted (bad magic or CRC) + * UBI_IO_BAD_HDR_EBADMSG: the same as %UBI_IO_BAD_HDR, but also there was a + * data integrity error reported by the MTD driver + * (uncorrectable ECC error in case of NAND) + * UBI_IO_BITFLIPS: bit-flips were detected and corrected + * + * UBI_FASTMAP_ANCHOR: u-boot SPL add on to tell the caller that the fastmap + * anchor block has been found + * + * Note, it is probably better to have bit-flip and ebadmsg as flags which can + * be or'ed with other error code. But this is a big change because there are + * may callers, so it does not worth the risk of introducing a bug + */ +enum { + UBI_IO_FF = 1, + UBI_IO_FF_BITFLIPS, + UBI_IO_BAD_HDR, + UBI_IO_BAD_HDR_EBADMSG, + UBI_IO_BITFLIPS, + UBI_FASTMAP_ANCHOR, +}; + +/* + * UBI volume type constants. + * + * @UBI_DYNAMIC_VOLUME: dynamic volume + * @UBI_STATIC_VOLUME: static volume + */ +enum { + UBI_DYNAMIC_VOLUME = 3, + UBI_STATIC_VOLUME = 4, +}; + +#define UBI_BAD_FASTMAP (-1) + +/* + * Stub structure so the fastmap code is happy. + */ +struct ubi_attach_info { + int i; +}; + +/** + * struct ubi_fastmap_layout - in-memory fastmap data structure. + * @e: PEBs used by the current fastmap + * @to_be_tortured: if non-zero tortured this PEB + * @used_blocks: number of used PEBs + * @max_pool_size: maximal size of the user pool + * @max_wl_pool_size: maximal size of the pool used by the WL sub-system + */ +struct ubi_fastmap_layout { + struct ubi_wl_entry *e[UBI_FM_MAX_BLOCKS]; + int to_be_tortured[UBI_FM_MAX_BLOCKS]; + int used_blocks; + int max_pool_size; + int max_wl_pool_size; +}; + +/** + * struct ubi_fm_pool - in-memory fastmap pool + * @pebs: PEBs in this pool + * @used: number of used PEBs + * @size: total number of PEBs in this pool + * @max_size: maximal size of the pool + * + * A pool gets filled with up to max_size. + * If all PEBs within the pool are used a new fastmap will be written + * to the flash and the pool gets refilled with empty PEBs. + * + */ +struct ubi_fm_pool { + int pebs[UBI_FM_MAX_POOL_SIZE]; + int used; + int size; + int max_size; +}; + +#endif diff --git a/drivers/mtd/ubispl/ubispl.c b/drivers/mtd/ubispl/ubispl.c new file mode 100644 index 0000000..9b11bd4 --- /dev/null +++ b/drivers/mtd/ubispl/ubispl.c @@ -0,0 +1,921 @@ +/* + * Copyright (c) Thomas Gleixner tglx@linutronix.de + * + * The parts taken from the kernel implementation are: + * + * Copyright (c) International Business Machines Corp., 2006 + + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.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 -1; + /* + * 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 -1; + + 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 -1; +} + +/* 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 vol_type, u32 pnum, u32 lnum) +{ + struct ubi_vol_info *vi = ubi->volinfo + vol_id; + u32 *ltp; + + /* + * We only care about static volumes with an id < + * UBI_SPL_VOL_IDS. + */ + if (vol_id >= UBI_SPL_VOL_IDS || vol_type != UBI_VID_STATIC) + return 0; + + /* + * 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 -1; + } + + 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 -1; + + 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 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, vh->vol_type, 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 -1; + + 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; +} + +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; + unsigned int fsize, nblocks; + 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; + nblocks = ubi->peb_count; + fsize = ubi->fsize_mb; + ubi_msg("attached by fastmap %uMB %u blocks", fsize, nblocks); + 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 -1; + } + + 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 -1; + } + + 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; + + if (vol_id >= UBI_SPL_VOL_IDS) + return -1; + + 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; + } + return 0; +} + +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("Load %s (#%d)", lv->name, lv->vol_id); + res = ipl_load(ubi, lv->vol_id, lv->load_addr); + if (res) { + if (fastmap) { + fastmap = 0; + goto retry; + } + ubi_warn("Failed \n"); + return res; + } + } + return 0; +} diff --git a/drivers/mtd/ubispl/ubispl.h b/drivers/mtd/ubispl/ubispl.h new file mode 100644 index 0000000..a64a394 --- /dev/null +++ b/drivers/mtd/ubispl/ubispl.h @@ -0,0 +1,136 @@ +/* + * Copyright (c) Thomas Gleixner tglx@linutronix.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _UBOOT_MTD_UBISPL_H +#define _UBOOT_MTD_UBISPL_H + +#include "../ubi/ubi-media.h" +#include "ubi-wrapper.h" + +/* + * The maximum number of volume ids we scan. So you can load volume id + * 0 to (CONFIG_SPL_UBI_VOL_ID_MAX - 1) + */ +#define UBI_SPL_VOL_IDS CONFIG_SPL_UBI_VOL_IDS +/* + * The size of the read buffer for the fastmap blocks. In theory up to + * UBI_FM_MAX_BLOCKS * CONFIG_SPL_MAX_PEB_SIZE. In practice today + * one or two blocks. + */ +#define UBI_FM_BUF_SIZE (UBI_FM_MAX_BLOCKS * CONFIG_SPL_UBI_MAX_PEB_SIZE) +/* + * The size of the bitmaps for the attach/ scan + */ +#define UBI_FM_BM_SIZE ((CONFIG_SPL_UBI_MAX_PEBS / BITS_PER_LONG) + 1) +/* + * The maximum number of logical erase blocks per loadable volume + */ +#define UBI_MAX_VOL_LEBS CONFIG_SPL_UBI_MAX_VOL_LEBS +/* + * The bitmap size for the above to denote the found blocks inside the volume + */ +#define UBI_VOL_BM_SIZE ((UBI_MAX_VOL_LEBS / BITS_PER_LONG) + 1) + +/** + * struct ubi_vol_info - UBISPL internal volume represenation + * @last_block: The last block (highest LEB) found for this volume + * @found: Bitmap to mark found LEBS + * @lebs_to_pebs: LEB to PEB translation table + */ +struct ubi_vol_info { + u32 last_block; + unsigned long found[UBI_VOL_BM_SIZE]; + u32 lebs_to_pebs[UBI_MAX_VOL_LEBS]; +}; + +/** + * struct ubi_scan_info - UBISPL internal data for FM attach and full scan + * + * @read: Read function to access the flash provided by the caller + * @peb_count: Number of physical erase blocks in the UBI FLASH area + * aka MTD partition. + * @peb_offset: Offset of PEB0 in the UBI FLASH area (aka MTD partition) + * to the real start of the FLASH in erase blocks. + * @fsize_mb: Size of the scanned FLASH area in MB (stats only) + * @vid_offset: Offset from the start of a PEB to the VID header + * @leb_start: Offset from the start of a PEB to the data area + * @leb_size: Size of the data area + * + * @fastmap_pebs: Counter of PEBs "attached" by fastmap + * @fastmap_anchor: The anchor PEB of the fastmap + * @fm_sb: The fastmap super block data + * @fm_vh: The fastmap VID header + * @fm: Pointer to the fastmap layout + * @fm_layout: The fastmap layout itself + * @fm_pool: The pool of PEBs to scan at fastmap attach time + * @fm_wl_pool: The pool of PEBs scheduled for wearleveling + * + * @fm_enabled: Indicator whether fastmap attachment is enabled. + * @fm_used: Bitmap to indicate the PEBS covered by fastmap + * @scanned: Bitmap to indicate the PEBS of which the VID header + * hase been physically scanned. + * @corrupt: Bitmap to indicate corrupt blocks + * @toload: Bitmap to indicate the volumes which should be loaded + * + * @blockinfo: The vid headers of the scanned blocks + * @volinfo: The volume information of the interesting (toload) + * volumes + * + * @fm_buf: The large fastmap attach buffer + */ +struct ubi_scan_info { + int (*read)(u32 pnum, u32 offset, u32 len, void *dest); + unsigned int fsize_mb; + unsigned int peb_count; + unsigned int peb_offset; + + unsigned long vid_offset; + unsigned long leb_start; + unsigned long leb_size; + + /* Fastmap: The upstream required fields */ + int fastmap_pebs; + int fastmap_anchor; + size_t fm_size; + struct ubi_fm_sb fm_sb; + struct ubi_vid_hdr fm_vh; + struct ubi_fastmap_layout *fm; + struct ubi_fastmap_layout fm_layout; + struct ubi_fm_pool fm_pool; + struct ubi_fm_pool fm_wl_pool; + + /* Fastmap: UBISPL specific data */ + int fm_enabled; + unsigned long fm_used[UBI_FM_BM_SIZE]; + unsigned long scanned[UBI_FM_BM_SIZE]; + unsigned long corrupt[UBI_FM_BM_SIZE]; + unsigned long toload[UBI_FM_BM_SIZE]; + + /* Data for storing the VID and volume information */ + struct ubi_vol_info volinfo[UBI_SPL_VOL_IDS]; + struct ubi_vid_hdr blockinfo[CONFIG_SPL_UBI_MAX_PEBS]; + + /* The large buffer for the fastmap */ + uint8_t fm_buf[UBI_FM_BUF_SIZE]; +}; + +#ifdef CFG_DEBUG +#define ubi_dbg(fmt, ...) printf("UBI: debug:" fmt "\n", ##__VA_ARGS__) +#else +#define ubi_dbg(fmt, ...) +#endif + +#ifdef CONFIG_UBI_SILENCE_MSG +#define ubi_msg(fmt, ...) +#else +#define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__) +#endif +/* UBI warning messages */ +#define ubi_warn(fmt, ...) printf("UBI warning: " fmt "\n", ##__VA_ARGS__) +/* UBI error messages */ +#define ubi_err(fmt, ...) printf("UBI error: " fmt "\n", ##__VA_ARGS__) + +#endif diff --git a/include/ubispl.h b/include/ubispl.h new file mode 100644 index 0000000..df4b0e1 --- /dev/null +++ b/include/ubispl.h @@ -0,0 +1,90 @@ +/* + * Copyright (c) Thomas Gleixner tglx@linutronix.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef __UBOOT_UBISPL_H +#define __UBOOT_UBISPL_H + +/* + * The following CONFIG options are relevant for UBISPL + * + * #define CONFIG_SPL_UBI_MAX_VOL_LEBS 256 + * + * Defines the maximum number of logical erase blocks per loadable + * (static) volume to size the ubispl internal arrays. + * + * #define CONFIG_SPL_UBI_MAX_PEB_SIZE (256*1024) + * + * Defines the maximum physical erase block size to size the fastmap + * buffer for ubispl. + * + * #define CONFIG_SPL_UBI_MAX_PEBS 4096 + * + * Define the maximum number of physical erase blocks to size the + * ubispl internal arrays. + * + * #define CONFIG_SPL_UBI_VOL_IDS 8 + * + * Defines the maximum number of volumes in which UBISPL is + * interested. Limits the amount of memory for the scan data and + * speeds up the scan process as we simply ignore stuff which we dont + * want to load from the SPL anyway. So the volumes which can be + * loaded in the above example are ids 0 - 7 + */ + +/* + * The struct definition is in drivers/mtd/ubispl/ubispl.h. It does + * not fit into the BSS due to the large buffer requirement of the + * upstream fastmap code. So the caller of ubispl_load_volumes needs + * to hand in a pointer to a free memory area where ubispl will place + * its data. The area is not required to be initialized. + */ +struct ubi_scan_info; + +/** + * struct ubispl_info - description structure for fast ubi scan + * @ubi: Pointer to memory space for ubi scan info structure + * @peb_size: Physical erase block size + * @vid_offset: Offset of the VID header + * @leb_start: Start of the logical erase block, i.e. offset of data + * @peb_count: Number of physical erase blocks in the UBI FLASH area + * aka MTD partition. + * @peb_offset: Offset of PEB0 in the UBI FLASH area (aka MTD partition) + * to the real start of the FLASH in erase blocks. + * @fastmap: Enable fastmap attachment + * @read: Read function to access the flash + */ +struct ubispl_info { + struct ubi_scan_info *ubi; + u32 peb_size; + u32 vid_offset; + u32 leb_start; + u32 peb_count; + u32 peb_offset; + int fastmap; + int (*read)(u32 pnum, u32 offset, u32 len, void *dest); +}; + +/** + * struct ubispl_load - structure to describe a volume to load + * @name: Name of the volume + * @vol_id: Volume id + * @load_addr: Load address of the volume + */ +struct ubispl_load { + char *name; + int vol_id; + void *load_addr; +}; + +/** + * ubispl_load_volumes - Scan flash and load volumes + * @info: Pointer to the ubi scan info structure + * @lovls: Pointer to array of volumes to load + * @nrvols: Array size of @lovls + */ +extern int ubispl_load_volumes(struct ubispl_info *info, + struct ubispl_load *lvols, int nrvols); + +#endif