diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/mtd/parsers/Kconfig | 162 | ||||
| -rw-r--r-- | drivers/mtd/parsers/Makefile | 11 | ||||
| -rw-r--r-- | drivers/mtd/parsers/afs.c | 395 | ||||
| -rw-r--r-- | drivers/mtd/parsers/ar7part.c | 129 | ||||
| -rw-r--r-- | drivers/mtd/parsers/bcm47xxpart.c | 317 | ||||
| -rw-r--r-- | drivers/mtd/parsers/bcm63xxpart.c | 172 | ||||
| -rw-r--r-- | drivers/mtd/parsers/cmdlinepart.c | 437 | ||||
| -rw-r--r-- | drivers/mtd/parsers/ofpart.c | 239 | ||||
| -rw-r--r-- | drivers/mtd/parsers/parser_imagetag.c | 221 | ||||
| -rw-r--r-- | drivers/mtd/parsers/parser_trx.c | 129 | ||||
| -rw-r--r-- | drivers/mtd/parsers/redboot.c | 324 | ||||
| -rw-r--r-- | drivers/mtd/parsers/sharpslpart.c | 399 |
12 files changed, 2935 insertions, 0 deletions
diff --git a/drivers/mtd/parsers/Kconfig b/drivers/mtd/parsers/Kconfig new file mode 100644 index 000000000..e72354322 --- /dev/null +++ b/drivers/mtd/parsers/Kconfig @@ -0,0 +1,162 @@ +# SPDX-License-Identifier: GPL-2.0-only +config MTD_AR7_PARTS + tristate "TI AR7 partitioning parser" + help + TI AR7 partitioning parser support + +config MTD_BCM47XX_PARTS + tristate "BCM47XX partitioning parser" + depends on BCM47XX || ARCH_BCM_5301X + help + This provides partitions parser for devices based on BCM47xx + boards. + +config MTD_BCM63XX_PARTS + bool "BCM63XX CFE partitioning parser" + depends on BCM63XX || BMIPS_GENERIC || COMPILE_TEST + select CRC32 + select MTD_PARSER_IMAGETAG + help + This provides partition parsing for BCM63xx devices with CFE + bootloaders. + +config MTD_CMDLINE_PARTS + tristate "Command line partition table parsing" + depends on MTD + help + Allow generic configuration of the MTD partition tables via the kernel + command line. Multiple flash resources are supported for hardware where + different kinds of flash memory are available. + + You will still need the parsing functions to be called by the driver + for your particular device. It won't happen automatically. The + SA1100 map driver (CONFIG_MTD_SA1100) has an option for this, for + example. + + The format for the command line is as follows: + + mtdparts=<mtddef>[;<mtddef] + <mtddef> := <mtd-id>:<partdef>[,<partdef>] + <partdef> := <size>[@offset][<name>][ro] + <mtd-id> := unique id used in mapping driver/device + <size> := standard linux memsize OR "-" to denote all + remaining space + <name> := (NAME) + + Due to the way Linux handles the command line, no spaces are + allowed in the partition definition, including mtd id's and partition + names. + + Examples: + + 1 flash resource (mtd-id "sa1100"), with 1 single writable partition: + mtdparts=sa1100:- + + Same flash, but 2 named partitions, the first one being read-only: + mtdparts=sa1100:256k(ARMboot)ro,-(root) + + If unsure, say 'N'. + +config MTD_OF_PARTS + tristate "OpenFirmware (device tree) partitioning parser" + default y + depends on OF + help + This provides a open firmware device tree partition parser + which derives the partition map from the children of the + flash memory node, as described in + Documentation/devicetree/bindings/mtd/partition.txt. + +config MTD_PARSER_IMAGETAG + tristate "Parser for BCM963XX Image Tag format partitions" + depends on BCM63XX || BMIPS_GENERIC || COMPILE_TEST + select CRC32 + help + Image Tag is the firmware header used by broadcom on their xDSL line + of devices. It is used to describe the offsets and lengths of kernel + and rootfs partitions. + This driver adds support for parsing a partition with an Image Tag + header and creates up to two partitions, kernel and rootfs. + +config MTD_AFS_PARTS + tristate "ARM Firmware Suite partition parsing" + depends on (ARM || ARM64) + help + The ARM Firmware Suite allows the user to divide flash devices into + multiple 'images'. Each such image has a header containing its name + and offset/size etc. + + If you need code which can detect and parse these tables, and + register MTD 'partitions' corresponding to each image detected, + enable this option. + + You will still need the parsing functions to be called by the driver + for your particular device. It won't happen automatically. The + 'physmap' map driver (CONFIG_MTD_PHYSMAP) does this, for example. + +config MTD_PARSER_TRX + tristate "Parser for TRX format partitions" + depends on MTD && (BCM47XX || ARCH_BCM_5301X || COMPILE_TEST) + help + TRX is a firmware format used by Broadcom on their devices. It + may contain up to 3/4 partitions (depending on the version). + This driver will parse TRX header and report at least two partitions: + kernel and rootfs. + +config MTD_SHARPSL_PARTS + tristate "Sharp SL Series NAND flash partition parser" + depends on MTD_NAND_SHARPSL || MTD_NAND_TMIO || COMPILE_TEST + help + This provides the read-only FTL logic necessary to read the partition + table from the NAND flash of Sharp SL Series (Zaurus) and the MTD + partition parser using this code. + +config MTD_REDBOOT_PARTS + tristate "RedBoot partition table parsing" + help + RedBoot is a ROM monitor and bootloader which deals with multiple + 'images' in flash devices by putting a table one of the erase + blocks on the device, similar to a partition table, which gives + the offsets, lengths and names of all the images stored in the + flash. + + If you need code which can detect and parse this table, and register + MTD 'partitions' corresponding to each image in the table, enable + this option. + + You will still need the parsing functions to be called by the driver + for your particular device. It won't happen automatically. The + SA1100 map driver (CONFIG_MTD_SA1100) has an option for this, for + example. + +if MTD_REDBOOT_PARTS + +config MTD_REDBOOT_DIRECTORY_BLOCK + int "Location of RedBoot partition table" + default "-1" + help + This option is the Linux counterpart to the + CYGNUM_REDBOOT_FIS_DIRECTORY_BLOCK RedBoot compile time + option. + + The option specifies which Flash sectors holds the RedBoot + partition table. A zero or positive value gives an absolute + erase block number. A negative value specifies a number of + sectors before the end of the device. + + For example "2" means block number 2, "-1" means the last + block and "-2" means the penultimate block. + +config MTD_REDBOOT_PARTS_UNALLOCATED + bool "Include unallocated flash regions" + help + If you need to register each unallocated flash region as a MTD + 'partition', enable this option. + +config MTD_REDBOOT_PARTS_READONLY + bool "Force read-only for RedBoot system images" + help + If you need to force read-only for 'RedBoot', 'RedBoot Config' and + 'FIS directory' images, enable this option. + +endif # MTD_REDBOOT_PARTS diff --git a/drivers/mtd/parsers/Makefile b/drivers/mtd/parsers/Makefile new file mode 100644 index 000000000..b0c5f62f9 --- /dev/null +++ b/drivers/mtd/parsers/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o +obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o +obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o +obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o +obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o +obj-$(CONFIG_MTD_PARSER_IMAGETAG) += parser_imagetag.o +obj-$(CONFIG_MTD_AFS_PARTS) += afs.o +obj-$(CONFIG_MTD_PARSER_TRX) += parser_trx.o +obj-$(CONFIG_MTD_SHARPSL_PARTS) += sharpslpart.o +obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o diff --git a/drivers/mtd/parsers/afs.c b/drivers/mtd/parsers/afs.c new file mode 100644 index 000000000..26116694c --- /dev/null +++ b/drivers/mtd/parsers/afs.c @@ -0,0 +1,395 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/*====================================================================== + + drivers/mtd/afs.c: ARM Flash Layout/Partitioning + + Copyright © 2000 ARM Limited + Copyright (C) 2019 Linus Walleij + + + This is access code for flashes using ARM's flash partitioning + standards. + +======================================================================*/ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/init.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#define AFSV1_FOOTER_MAGIC 0xA0FFFF9F +#define AFSV2_FOOTER_MAGIC1 0x464C5348 /* "FLSH" */ +#define AFSV2_FOOTER_MAGIC2 0x464F4F54 /* "FOOT" */ + +struct footer_v1 { + u32 image_info_base; /* Address of first word of ImageFooter */ + u32 image_start; /* Start of area reserved by this footer */ + u32 signature; /* 'Magic' number proves it's a footer */ + u32 type; /* Area type: ARM Image, SIB, customer */ + u32 checksum; /* Just this structure */ +}; + +struct image_info_v1 { + u32 bootFlags; /* Boot flags, compression etc. */ + u32 imageNumber; /* Unique number, selects for boot etc. */ + u32 loadAddress; /* Address program should be loaded to */ + u32 length; /* Actual size of image */ + u32 address; /* Image is executed from here */ + char name[16]; /* Null terminated */ + u32 headerBase; /* Flash Address of any stripped header */ + u32 header_length; /* Length of header in memory */ + u32 headerType; /* AIF, RLF, s-record etc. */ + u32 checksum; /* Image checksum (inc. this struct) */ +}; + +static u32 word_sum(void *words, int num) +{ + u32 *p = words; + u32 sum = 0; + + while (num--) + sum += *p++; + + return sum; +} + +static u32 word_sum_v2(u32 *p, u32 num) +{ + u32 sum = 0; + int i; + + for (i = 0; i < num; i++) { + u32 val; + + val = p[i]; + if (val > ~sum) + sum++; + sum += val; + } + return ~sum; +} + +static bool afs_is_v1(struct mtd_info *mtd, u_int off) +{ + /* The magic is 12 bytes from the end of the erase block */ + u_int ptr = off + mtd->erasesize - 12; + u32 magic; + size_t sz; + int ret; + + ret = mtd_read(mtd, ptr, 4, &sz, (u_char *)&magic); + if (ret < 0) { + printk(KERN_ERR "AFS: mtd read failed at 0x%x: %d\n", + ptr, ret); + return false; + } + if (ret >= 0 && sz != 4) + return false; + + return (magic == AFSV1_FOOTER_MAGIC); +} + +static bool afs_is_v2(struct mtd_info *mtd, u_int off) +{ + /* The magic is the 8 last bytes of the erase block */ + u_int ptr = off + mtd->erasesize - 8; + u32 foot[2]; + size_t sz; + int ret; + + ret = mtd_read(mtd, ptr, 8, &sz, (u_char *)foot); + if (ret < 0) { + printk(KERN_ERR "AFS: mtd read failed at 0x%x: %d\n", + ptr, ret); + return false; + } + if (ret >= 0 && sz != 8) + return false; + + return (foot[0] == AFSV2_FOOTER_MAGIC1 && + foot[1] == AFSV2_FOOTER_MAGIC2); +} + +static int afs_parse_v1_partition(struct mtd_info *mtd, + u_int off, struct mtd_partition *part) +{ + struct footer_v1 fs; + struct image_info_v1 iis; + u_int mask; + /* + * Static checks cannot see that we bail out if we have an error + * reading the footer. + */ + u_int iis_ptr; + u_int img_ptr; + u_int ptr; + size_t sz; + int ret; + int i; + + /* + * This is the address mask; we use this to mask off out of + * range address bits. + */ + mask = mtd->size - 1; + + ptr = off + mtd->erasesize - sizeof(fs); + ret = mtd_read(mtd, ptr, sizeof(fs), &sz, (u_char *)&fs); + if (ret >= 0 && sz != sizeof(fs)) + ret = -EINVAL; + if (ret < 0) { + printk(KERN_ERR "AFS: mtd read failed at 0x%x: %d\n", + ptr, ret); + return ret; + } + /* + * Check the checksum. + */ + if (word_sum(&fs, sizeof(fs) / sizeof(u32)) != 0xffffffff) + return -EINVAL; + + /* + * Hide the SIB (System Information Block) + */ + if (fs.type == 2) + return 0; + + iis_ptr = fs.image_info_base & mask; + img_ptr = fs.image_start & mask; + + /* + * Check the image info base. This can not + * be located after the footer structure. + */ + if (iis_ptr >= ptr) + return 0; + + /* + * Check the start of this image. The image + * data can not be located after this block. + */ + if (img_ptr > off) + return 0; + + /* Read the image info block */ + memset(&iis, 0, sizeof(iis)); + ret = mtd_read(mtd, iis_ptr, sizeof(iis), &sz, (u_char *)&iis); + if (ret < 0) { + printk(KERN_ERR "AFS: mtd read failed at 0x%x: %d\n", + iis_ptr, ret); + return -EINVAL; + } + + if (sz != sizeof(iis)) + return -EINVAL; + + /* + * Validate the name - it must be NUL terminated. + */ + for (i = 0; i < sizeof(iis.name); i++) + if (iis.name[i] == '\0') + break; + if (i > sizeof(iis.name)) + return -EINVAL; + + part->name = kstrdup(iis.name, GFP_KERNEL); + if (!part->name) + return -ENOMEM; + + part->size = (iis.length + mtd->erasesize - 1) & ~(mtd->erasesize - 1); + part->offset = img_ptr; + part->mask_flags = 0; + + printk(" mtd: at 0x%08x, %5lluKiB, %8u, %s\n", + img_ptr, part->size / 1024, + iis.imageNumber, part->name); + + return 0; +} + +static int afs_parse_v2_partition(struct mtd_info *mtd, + u_int off, struct mtd_partition *part) +{ + u_int ptr; + u32 footer[12]; + u32 imginfo[36]; + char *name; + u32 version; + u32 entrypoint; + u32 attributes; + u32 region_count; + u32 block_start; + u32 block_end; + u32 crc; + size_t sz; + int ret; + int i; + int pad = 0; + + pr_debug("Parsing v2 partition @%08x-%08x\n", + off, off + mtd->erasesize); + + /* First read the footer */ + ptr = off + mtd->erasesize - sizeof(footer); + ret = mtd_read(mtd, ptr, sizeof(footer), &sz, (u_char *)footer); + if ((ret < 0) || (ret >= 0 && sz != sizeof(footer))) { + pr_err("AFS: mtd read failed at 0x%x: %d\n", + ptr, ret); + return -EIO; + } + name = (char *) &footer[0]; + version = footer[9]; + ptr = off + mtd->erasesize - sizeof(footer) - footer[8]; + + pr_debug("found image \"%s\", version %08x, info @%08x\n", + name, version, ptr); + + /* Then read the image information */ + ret = mtd_read(mtd, ptr, sizeof(imginfo), &sz, (u_char *)imginfo); + if ((ret < 0) || (ret >= 0 && sz != sizeof(imginfo))) { + pr_err("AFS: mtd read failed at 0x%x: %d\n", + ptr, ret); + return -EIO; + } + + /* 32bit platforms have 4 bytes padding */ + crc = word_sum_v2(&imginfo[1], 34); + if (!crc) { + pr_debug("Padding 1 word (4 bytes)\n"); + pad = 1; + } else { + /* 64bit platforms have 8 bytes padding */ + crc = word_sum_v2(&imginfo[2], 34); + if (!crc) { + pr_debug("Padding 2 words (8 bytes)\n"); + pad = 2; + } + } + if (crc) { + pr_err("AFS: bad checksum on v2 image info: %08x\n", crc); + return -EINVAL; + } + entrypoint = imginfo[pad]; + attributes = imginfo[pad+1]; + region_count = imginfo[pad+2]; + block_start = imginfo[20]; + block_end = imginfo[21]; + + pr_debug("image entry=%08x, attr=%08x, regions=%08x, " + "bs=%08x, be=%08x\n", + entrypoint, attributes, region_count, + block_start, block_end); + + for (i = 0; i < region_count; i++) { + u32 region_load_addr = imginfo[pad + 3 + i*4]; + u32 region_size = imginfo[pad + 4 + i*4]; + u32 region_offset = imginfo[pad + 5 + i*4]; + u32 region_start; + u32 region_end; + + pr_debug(" region %d: address: %08x, size: %08x, " + "offset: %08x\n", + i, + region_load_addr, + region_size, + region_offset); + + region_start = off + region_offset; + region_end = region_start + region_size; + /* Align partition to end of erase block */ + region_end += (mtd->erasesize - 1); + region_end &= ~(mtd->erasesize -1); + pr_debug(" partition start = %08x, partition end = %08x\n", + region_start, region_end); + + /* Create one partition per region */ + part->name = kstrdup(name, GFP_KERNEL); + if (!part->name) + return -ENOMEM; + part->offset = region_start; + part->size = region_end - region_start; + part->mask_flags = 0; + } + + return 0; +} + +static int parse_afs_partitions(struct mtd_info *mtd, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_partition *parts; + u_int off, sz; + int ret = 0; + int i; + + /* Count the partitions by looping over all erase blocks */ + for (i = off = sz = 0; off < mtd->size; off += mtd->erasesize) { + if (afs_is_v1(mtd, off)) { + sz += sizeof(struct mtd_partition); + i += 1; + } + if (afs_is_v2(mtd, off)) { + sz += sizeof(struct mtd_partition); + i += 1; + } + } + + if (!i) + return 0; + + parts = kzalloc(sz, GFP_KERNEL); + if (!parts) + return -ENOMEM; + + /* + * Identify the partitions + */ + for (i = off = 0; off < mtd->size; off += mtd->erasesize) { + if (afs_is_v1(mtd, off)) { + ret = afs_parse_v1_partition(mtd, off, &parts[i]); + if (ret) + goto out_free_parts; + i++; + } + if (afs_is_v2(mtd, off)) { + ret = afs_parse_v2_partition(mtd, off, &parts[i]); + if (ret) + goto out_free_parts; + i++; + } + } + + *pparts = parts; + return i; + +out_free_parts: + while (--i >= 0) + kfree(parts[i].name); + kfree(parts); + *pparts = NULL; + return ret; +} + +static const struct of_device_id mtd_parser_afs_of_match_table[] = { + { .compatible = "arm,arm-firmware-suite" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtd_parser_afs_of_match_table); + +static struct mtd_part_parser afs_parser = { + .parse_fn = parse_afs_partitions, + .name = "afs", + .of_match_table = mtd_parser_afs_of_match_table, +}; +module_mtd_part_parser(afs_parser); + +MODULE_AUTHOR("ARM Ltd"); +MODULE_DESCRIPTION("ARM Firmware Suite partition parser"); +MODULE_LICENSE("GPL"); diff --git a/drivers/mtd/parsers/ar7part.c b/drivers/mtd/parsers/ar7part.c new file mode 100644 index 000000000..8cd683711 --- /dev/null +++ b/drivers/mtd/parsers/ar7part.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright © 2007 Eugene Konev <ejka@openwrt.org> + * + * TI AR7 flash partition table. + * Based on ar7 map by Felix Fietkau <nbd@openwrt.org> + */ + +#include <linux/kernel.h> +#include <linux/slab.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/memblock.h> +#include <linux/module.h> + +#include <uapi/linux/magic.h> + +#define AR7_PARTS 4 +#define ROOT_OFFSET 0xe0000 + +#define LOADER_MAGIC1 le32_to_cpu(0xfeedfa42) +#define LOADER_MAGIC2 le32_to_cpu(0xfeed1281) + +struct ar7_bin_rec { + unsigned int checksum; + unsigned int length; + unsigned int address; +}; + +static int create_mtd_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct ar7_bin_rec header; + unsigned int offset; + size_t len; + unsigned int pre_size = master->erasesize, post_size = 0; + unsigned int root_offset = ROOT_OFFSET; + + int retries = 10; + struct mtd_partition *ar7_parts; + + ar7_parts = kcalloc(AR7_PARTS, sizeof(*ar7_parts), GFP_KERNEL); + if (!ar7_parts) + return -ENOMEM; + ar7_parts[0].name = "loader"; + ar7_parts[0].offset = 0; + ar7_parts[0].size = master->erasesize; + ar7_parts[0].mask_flags = MTD_WRITEABLE; + + ar7_parts[1].name = "config"; + ar7_parts[1].offset = 0; + ar7_parts[1].size = master->erasesize; + ar7_parts[1].mask_flags = 0; + + do { /* Try 10 blocks starting from master->erasesize */ + offset = pre_size; + mtd_read(master, offset, sizeof(header), &len, + (uint8_t *)&header); + if (!strncmp((char *)&header, "TIENV0.8", 8)) + ar7_parts[1].offset = pre_size; + if (header.checksum == LOADER_MAGIC1) + break; + if (header.checksum == LOADER_MAGIC2) + break; + pre_size += master->erasesize; + } while (retries--); + + pre_size = offset; + + if (!ar7_parts[1].offset) { + ar7_parts[1].offset = master->size - master->erasesize; + post_size = master->erasesize; + } + + switch (header.checksum) { + case LOADER_MAGIC1: + while (header.length) { + offset += sizeof(header) + header.length; + mtd_read(master, offset, sizeof(header), &len, + (uint8_t *)&header); + } + root_offset = offset + sizeof(header) + 4; + break; + case LOADER_MAGIC2: + while (header.length) { + offset += sizeof(header) + header.length; + mtd_read(master, offset, sizeof(header), &len, + (uint8_t *)&header); + } + root_offset = offset + sizeof(header) + 4 + 0xff; + root_offset &= ~(uint32_t)0xff; + break; + default: + printk(KERN_WARNING "Unknown magic: %08x\n", header.checksum); + break; + } + + mtd_read(master, root_offset, sizeof(header), &len, (u8 *)&header); + if (header.checksum != SQUASHFS_MAGIC) { + root_offset += master->erasesize - 1; + root_offset &= ~(master->erasesize - 1); + } + + ar7_parts[2].name = "linux"; + ar7_parts[2].offset = pre_size; + ar7_parts[2].size = master->size - pre_size - post_size; + ar7_parts[2].mask_flags = 0; + + ar7_parts[3].name = "rootfs"; + ar7_parts[3].offset = root_offset; + ar7_parts[3].size = master->size - root_offset - post_size; + ar7_parts[3].mask_flags = 0; + + *pparts = ar7_parts; + return AR7_PARTS; +} + +static struct mtd_part_parser ar7_parser = { + .parse_fn = create_mtd_partitions, + .name = "ar7part", +}; +module_mtd_part_parser(ar7_parser); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR( "Felix Fietkau <nbd@openwrt.org>, " + "Eugene Konev <ejka@openwrt.org>"); +MODULE_DESCRIPTION("MTD partitioning for TI AR7"); diff --git a/drivers/mtd/parsers/bcm47xxpart.c b/drivers/mtd/parsers/bcm47xxpart.c new file mode 100644 index 000000000..13daf9bff --- /dev/null +++ b/drivers/mtd/parsers/bcm47xxpart.c @@ -0,0 +1,317 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * BCM47XX MTD partitioning + * + * Copyright © 2012 Rafał Miłecki <zajec5@gmail.com> + */ + +#include <linux/bcm47xx_nvram.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +#include <uapi/linux/magic.h> + +/* + * NAND flash on Netgear R6250 was verified to contain 15 partitions. + * This will result in allocating too big array for some old devices, but the + * memory will be freed soon anyway (see mtd_device_parse_register). + */ +#define BCM47XXPART_MAX_PARTS 20 + +/* + * Amount of bytes we read when analyzing each block of flash memory. + * Set it big enough to allow detecting partition and reading important data. + */ +#define BCM47XXPART_BYTES_TO_READ 0x4e8 + +/* Magics */ +#define BOARD_DATA_MAGIC 0x5246504D /* MPFR */ +#define BOARD_DATA_MAGIC2 0xBD0D0BBD +#define CFE_MAGIC 0x43464531 /* 1EFC */ +#define FACTORY_MAGIC 0x59544346 /* FCTY */ +#define NVRAM_HEADER 0x48534C46 /* FLSH */ +#define POT_MAGIC1 0x54544f50 /* POTT */ +#define POT_MAGIC2 0x504f /* OP */ +#define ML_MAGIC1 0x39685a42 +#define ML_MAGIC2 0x26594131 +#define TRX_MAGIC 0x30524448 +#define SHSQ_MAGIC 0x71736873 /* shsq (weird ZTE H218N endianness) */ + +static const char * const trx_types[] = { "trx", NULL }; + +struct trx_header { + uint32_t magic; + uint32_t length; + uint32_t crc32; + uint16_t flags; + uint16_t version; + uint32_t offset[3]; +} __packed; + +static void bcm47xxpart_add_part(struct mtd_partition *part, const char *name, + u64 offset, uint32_t mask_flags) +{ + part->name = name; + part->offset = offset; + part->mask_flags = mask_flags; +} + +/** + * bcm47xxpart_bootpartition - gets index of TRX partition used by bootloader + * + * Some devices may have more than one TRX partition. In such case one of them + * is the main one and another a failsafe one. Bootloader may fallback to the + * failsafe firmware if it detects corruption of the main image. + * + * This function provides info about currently used TRX partition. It's the one + * containing kernel started by the bootloader. + */ +static int bcm47xxpart_bootpartition(void) +{ + char buf[4]; + int bootpartition; + + /* Check CFE environment variable */ + if (bcm47xx_nvram_getenv("bootpartition", buf, sizeof(buf)) > 0) { + if (!kstrtoint(buf, 0, &bootpartition)) + return bootpartition; + } + + return 0; +} + +static int bcm47xxpart_parse(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_partition *parts; + uint8_t i, curr_part = 0; + uint32_t *buf; + size_t bytes_read; + uint32_t offset; + uint32_t blocksize = master->erasesize; + int trx_parts[2]; /* Array with indexes of TRX partitions */ + int trx_num = 0; /* Number of found TRX partitions */ + int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, }; + int err; + + /* + * Some really old flashes (like AT45DB*) had smaller erasesize-s, but + * partitions were aligned to at least 0x1000 anyway. + */ + if (blocksize < 0x1000) + blocksize = 0x1000; + + /* Alloc */ + parts = kcalloc(BCM47XXPART_MAX_PARTS, sizeof(struct mtd_partition), + GFP_KERNEL); + if (!parts) + return -ENOMEM; + + buf = kzalloc(BCM47XXPART_BYTES_TO_READ, GFP_KERNEL); + if (!buf) { + kfree(parts); + return -ENOMEM; + } + + /* Parse block by block looking for magics */ + for (offset = 0; offset <= master->size - blocksize; + offset += blocksize) { + /* Nothing more in higher memory on BCM47XX (MIPS) */ + if (IS_ENABLED(CONFIG_BCM47XX) && offset >= 0x2000000) + break; + + if (curr_part >= BCM47XXPART_MAX_PARTS) { + pr_warn("Reached maximum number of partitions, scanning stopped!\n"); + break; + } + + /* Read beginning of the block */ + err = mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ, + &bytes_read, (uint8_t *)buf); + if (err && !mtd_is_bitflip(err)) { + pr_err("mtd_read error while parsing (offset: 0x%X): %d\n", + offset, err); + continue; + } + + /* Magic or small NVRAM at 0x400 */ + if ((buf[0x4e0 / 4] == CFE_MAGIC && buf[0x4e4 / 4] == CFE_MAGIC) || + (buf[0x400 / 4] == NVRAM_HEADER)) { + bcm47xxpart_add_part(&parts[curr_part++], "boot", + offset, MTD_WRITEABLE); + continue; + } + + /* + * board_data starts with board_id which differs across boards, + * but we can use 'MPFR' (hopefully) magic at 0x100 + */ + if (buf[0x100 / 4] == BOARD_DATA_MAGIC) { + bcm47xxpart_add_part(&parts[curr_part++], "board_data", + offset, MTD_WRITEABLE); + continue; + } + + /* Found on Huawei E970 */ + if (buf[0x000 / 4] == FACTORY_MAGIC) { + bcm47xxpart_add_part(&parts[curr_part++], "factory", + offset, MTD_WRITEABLE); + continue; + } + + /* POT(TOP) */ + if (buf[0x000 / 4] == POT_MAGIC1 && + (buf[0x004 / 4] & 0xFFFF) == POT_MAGIC2) { + bcm47xxpart_add_part(&parts[curr_part++], "POT", offset, + MTD_WRITEABLE); + continue; + } + + /* ML */ + if (buf[0x010 / 4] == ML_MAGIC1 && + buf[0x014 / 4] == ML_MAGIC2) { + bcm47xxpart_add_part(&parts[curr_part++], "ML", offset, + MTD_WRITEABLE); + continue; + } + + /* TRX */ + if (buf[0x000 / 4] == TRX_MAGIC) { + struct trx_header *trx; + uint32_t last_subpart; + uint32_t trx_size; + + if (trx_num >= ARRAY_SIZE(trx_parts)) + pr_warn("No enough space to store another TRX found at 0x%X\n", + offset); + else + trx_parts[trx_num++] = curr_part; + bcm47xxpart_add_part(&parts[curr_part++], "firmware", + offset, 0); + + /* + * Try to find TRX size. The "length" field isn't fully + * reliable as it could be decreased to make CRC32 cover + * only part of TRX data. It's commonly used as checksum + * can't cover e.g. ever-changing rootfs partition. + * Use offsets as helpers for assuming min TRX size. + */ + trx = (struct trx_header *)buf; + last_subpart = max3(trx->offset[0], trx->offset[1], + trx->offset[2]); + trx_size = max(trx->length, last_subpart + blocksize); + + /* + * Skip the TRX data. Decrease offset by block size as + * the next loop iteration will increase it. + */ + offset += roundup(trx_size, blocksize) - blocksize; + continue; + } + + /* Squashfs on devices not using TRX */ + if (le32_to_cpu(buf[0x000 / 4]) == SQUASHFS_MAGIC || + buf[0x000 / 4] == SHSQ_MAGIC) { + bcm47xxpart_add_part(&parts[curr_part++], "rootfs", + offset, 0); + continue; + } + + /* + * New (ARM?) devices may have NVRAM in some middle block. Last + * block will be checked later, so skip it. + */ + if (offset != master->size - blocksize && + buf[0x000 / 4] == NVRAM_HEADER) { + bcm47xxpart_add_part(&parts[curr_part++], "nvram", + offset, 0); + continue; + } + + /* Read middle of the block */ + err = mtd_read(master, offset + (blocksize / 2), 0x4, &bytes_read, + (uint8_t *)buf); + if (err && !mtd_is_bitflip(err)) { + pr_err("mtd_read error while parsing (offset: 0x%X): %d\n", + offset + (blocksize / 2), err); + continue; + } + + /* Some devices (ex. WNDR3700v3) don't have a standard 'MPFR' */ + if (buf[0x000 / 4] == BOARD_DATA_MAGIC2) { + bcm47xxpart_add_part(&parts[curr_part++], "board_data", + offset, MTD_WRITEABLE); + continue; + } + } + + /* Look for NVRAM at the end of the last block. */ + for (i = 0; i < ARRAY_SIZE(possible_nvram_sizes); i++) { + if (curr_part >= BCM47XXPART_MAX_PARTS) { + pr_warn("Reached maximum number of partitions, scanning stopped!\n"); + break; + } + + offset = master->size - possible_nvram_sizes[i]; + err = mtd_read(master, offset, 0x4, &bytes_read, + (uint8_t *)buf); + if (err && !mtd_is_bitflip(err)) { + pr_err("mtd_read error while reading (offset 0x%X): %d\n", + offset, err); + continue; + } + + /* Standard NVRAM */ + if (buf[0] == NVRAM_HEADER) { + bcm47xxpart_add_part(&parts[curr_part++], "nvram", + master->size - blocksize, 0); + break; + } + } + + kfree(buf); + + /* + * Assume that partitions end at the beginning of the one they are + * followed by. + */ + for (i = 0; i < curr_part; i++) { + u64 next_part_offset = (i < curr_part - 1) ? + parts[i + 1].offset : master->size; + + parts[i].size = next_part_offset - parts[i].offset; + } + + /* If there was TRX parse it now */ + for (i = 0; i < trx_num; i++) { + struct mtd_partition *trx = &parts[trx_parts[i]]; + + if (i == bcm47xxpart_bootpartition()) + trx->types = trx_types; + else + trx->name = "failsafe"; + } + + *pparts = parts; + return curr_part; +}; + +static const struct of_device_id bcm47xxpart_of_match_table[] = { + { .compatible = "brcm,bcm947xx-cfe-partitions" }, + {}, +}; +MODULE_DEVICE_TABLE(of, bcm47xxpart_of_match_table); + +static struct mtd_part_parser bcm47xxpart_mtd_parser = { + .parse_fn = bcm47xxpart_parse, + .name = "bcm47xxpart", + .of_match_table = bcm47xxpart_of_match_table, +}; +module_mtd_part_parser(bcm47xxpart_mtd_parser); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("MTD partitioning for BCM47XX flash memories"); diff --git a/drivers/mtd/parsers/bcm63xxpart.c b/drivers/mtd/parsers/bcm63xxpart.c new file mode 100644 index 000000000..b15bdadae --- /dev/null +++ b/drivers/mtd/parsers/bcm63xxpart.c @@ -0,0 +1,172 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * BCM63XX CFE image tag parser + * + * Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org> + * Mike Albon <malbon@openwrt.org> + * Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net> + * Copyright © 2011-2013 Jonas Gorski <jonas.gorski@gmail.com> + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/bcm963xx_nvram.h> +#include <linux/bcm963xx_tag.h> +#include <linux/crc32.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sizes.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/of.h> + +#ifdef CONFIG_MIPS +#include <asm/bootinfo.h> +#include <asm/fw/cfe/cfe_api.h> +#endif /* CONFIG_MIPS */ + +#define BCM963XX_CFE_BLOCK_SIZE SZ_64K /* always at least 64KiB */ + +#define BCM963XX_CFE_MAGIC_OFFSET 0x4e0 +#define BCM963XX_CFE_VERSION_OFFSET 0x570 +#define BCM963XX_NVRAM_OFFSET 0x580 + +/* Ensure strings read from flash structs are null terminated */ +#define STR_NULL_TERMINATE(x) \ + do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0) + +static inline int bcm63xx_detect_cfe(void) +{ + int ret = 0; + +#ifdef CONFIG_MIPS + ret = (fw_arg3 == CFE_EPTSEAL); +#endif /* CONFIG_MIPS */ + + return ret; +} + +static int bcm63xx_read_nvram(struct mtd_info *master, + struct bcm963xx_nvram *nvram) +{ + u32 actual_crc, expected_crc; + size_t retlen; + int ret; + + /* extract nvram data */ + ret = mtd_read(master, BCM963XX_NVRAM_OFFSET, BCM963XX_NVRAM_V5_SIZE, + &retlen, (void *)nvram); + if (ret) + return ret; + + ret = bcm963xx_nvram_checksum(nvram, &expected_crc, &actual_crc); + if (ret) + pr_warn("nvram checksum failed, contents may be invalid (expected %08x, got %08x)\n", + expected_crc, actual_crc); + + if (!nvram->psi_size) + nvram->psi_size = BCM963XX_DEFAULT_PSI_SIZE; + + return 0; +} + +static const char * const bcm63xx_cfe_part_types[] = { + "bcm963xx-imagetag", + NULL, +}; + +static int bcm63xx_parse_cfe_nor_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, struct bcm963xx_nvram *nvram) +{ + struct mtd_partition *parts; + int nrparts = 3, curpart = 0; + unsigned int cfelen, nvramlen; + unsigned int cfe_erasesize; + int i; + + cfe_erasesize = max_t(uint32_t, master->erasesize, + BCM963XX_CFE_BLOCK_SIZE); + + cfelen = cfe_erasesize; + nvramlen = nvram->psi_size * SZ_1K; + nvramlen = roundup(nvramlen, cfe_erasesize); + + parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL); + if (!parts) + return -ENOMEM; + + /* Start building partition list */ + parts[curpart].name = "CFE"; + parts[curpart].offset = 0; + parts[curpart].size = cfelen; + curpart++; + + parts[curpart].name = "nvram"; + parts[curpart].offset = master->size - nvramlen; + parts[curpart].size = nvramlen; + curpart++; + + /* Global partition "linux" to make easy firmware upgrade */ + parts[curpart].name = "linux"; + parts[curpart].offset = cfelen; + parts[curpart].size = master->size - cfelen - nvramlen; + parts[curpart].types = bcm63xx_cfe_part_types; + + for (i = 0; i < nrparts; i++) + pr_info("Partition %d is %s offset %llx and length %llx\n", i, + parts[i].name, parts[i].offset, parts[i].size); + + *pparts = parts; + + return nrparts; +} + +static int bcm63xx_parse_cfe_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct bcm963xx_nvram *nvram = NULL; + int ret; + + if (!bcm63xx_detect_cfe()) + return -EINVAL; + + nvram = vzalloc(sizeof(*nvram)); + if (!nvram) + return -ENOMEM; + + ret = bcm63xx_read_nvram(master, nvram); + if (ret) + goto out; + + if (!mtd_type_is_nand(master)) + ret = bcm63xx_parse_cfe_nor_partitions(master, pparts, nvram); + else + ret = -EINVAL; + +out: + vfree(nvram); + return ret; +}; + +static const struct of_device_id parse_bcm63xx_cfe_match_table[] = { + { .compatible = "brcm,bcm963xx-cfe-nor-partitions" }, + {}, +}; +MODULE_DEVICE_TABLE(of, parse_bcm63xx_cfe_match_table); + +static struct mtd_part_parser bcm63xx_cfe_parser = { + .parse_fn = bcm63xx_parse_cfe_partitions, + .name = "bcm63xxpart", + .of_match_table = parse_bcm63xx_cfe_match_table, +}; +module_mtd_part_parser(bcm63xx_cfe_parser); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Daniel Dickinson <openwrt@cshore.neomailbox.net>"); +MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); +MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>"); +MODULE_AUTHOR("Jonas Gorski <jonas.gorski@gmail.com"); +MODULE_DESCRIPTION("MTD partitioning for BCM63XX CFE bootloaders"); diff --git a/drivers/mtd/parsers/cmdlinepart.c b/drivers/mtd/parsers/cmdlinepart.c new file mode 100644 index 000000000..0ddff1a4b --- /dev/null +++ b/drivers/mtd/parsers/cmdlinepart.c @@ -0,0 +1,437 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Read flash partition table from command line + * + * Copyright © 2002 SYSGO Real-Time Solutions GmbH + * Copyright © 2002-2010 David Woodhouse <dwmw2@infradead.org> + * + * The format for the command line is as follows: + * + * mtdparts=<mtddef>[;<mtddef] + * <mtddef> := <mtd-id>:<partdef>[,<partdef>] + * <partdef> := <size>[@<offset>][<name>][ro][lk][slc] + * <mtd-id> := unique name used in mapping driver/device (mtd->name) + * <size> := standard linux memsize OR "-" to denote all remaining space + * size is automatically truncated at end of device + * if specified or truncated size is 0 the part is skipped + * <offset> := standard linux memsize + * if omitted the part will immediately follow the previous part + * or 0 if the first part + * <name> := '(' NAME ')' + * NAME will appear in /proc/mtd + * + * <size> and <offset> can be specified such that the parts are out of order + * in physical memory and may even overlap. + * + * The parts are assigned MTD numbers in the order they are specified in the + * command line regardless of their order in physical memory. + * + * Examples: + * + * 1 NOR Flash, with 1 single writable partition: + * edb7312-nor:- + * + * 1 NOR Flash with 2 partitions, 1 NAND with one + * edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home) + */ + +#define pr_fmt(fmt) "mtd: " fmt + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/module.h> +#include <linux/err.h> + +/* debug macro */ +#if 0 +#define dbg(x) do { printk("DEBUG-CMDLINE-PART: "); printk x; } while(0) +#else +#define dbg(x) +#endif + + +/* special size referring to all the remaining space in a partition */ +#define SIZE_REMAINING ULLONG_MAX +#define OFFSET_CONTINUOUS ULLONG_MAX + +struct cmdline_mtd_partition { + struct cmdline_mtd_partition *next; + char *mtd_id; + int num_parts; + struct mtd_partition *parts; +}; + +/* mtdpart_setup() parses into here */ +static struct cmdline_mtd_partition *partitions; + +/* the command line passed to mtdpart_setup() */ +static char *mtdparts; +static char *cmdline; +static int cmdline_parsed; + +/* + * Parse one partition definition for an MTD. Since there can be many + * comma separated partition definitions, this function calls itself + * recursively until no more partition definitions are found. Nice side + * effect: the memory to keep the mtd_partition structs and the names + * is allocated upon the last definition being found. At that point the + * syntax has been verified ok. + */ +static struct mtd_partition * newpart(char *s, + char **retptr, + int *num_parts, + int this_part, + unsigned char **extra_mem_ptr, + int extra_mem_size) +{ + struct mtd_partition *parts; + unsigned long long size, offset = OFFSET_CONTINUOUS; + char *name; + int name_len; + unsigned char *extra_mem; + char delim; + unsigned int mask_flags, add_flags; + + /* fetch the partition size */ + if (*s == '-') { + /* assign all remaining space to this partition */ + size = SIZE_REMAINING; + s++; + } else { + size = memparse(s, &s); + if (!size) { + pr_err("partition has size 0\n"); + return ERR_PTR(-EINVAL); + } + } + + /* fetch partition name and flags */ + mask_flags = 0; /* this is going to be a regular partition */ + add_flags = 0; + delim = 0; + + /* check for offset */ + if (*s == '@') { + s++; + offset = memparse(s, &s); + } + + /* now look for name */ + if (*s == '(') + delim = ')'; + + if (delim) { + char *p; + + name = ++s; + p = strchr(name, delim); + if (!p) { + pr_err("no closing %c found in partition name\n", delim); + return ERR_PTR(-EINVAL); + } + name_len = p - name; + s = p + 1; + } else { + name = NULL; + name_len = 13; /* Partition_000 */ + } + + /* record name length for memory allocation later */ + extra_mem_size += name_len + 1; + + /* test for options */ + if (strncmp(s, "ro", 2) == 0) { + mask_flags |= MTD_WRITEABLE; + s += 2; + } + + /* if lk is found do NOT unlock the MTD partition*/ + if (strncmp(s, "lk", 2) == 0) { + mask_flags |= MTD_POWERUP_LOCK; + s += 2; + } + + /* if slc is found use emulated SLC mode on this partition*/ + if (!strncmp(s, "slc", 3)) { + add_flags |= MTD_SLC_ON_MLC_EMULATION; + s += 3; + } + + /* test if more partitions are following */ + if (*s == ',') { + if (size == SIZE_REMAINING) { + pr_err("no partitions allowed after a fill-up partition\n"); + return ERR_PTR(-EINVAL); + } + /* more partitions follow, parse them */ + parts = newpart(s + 1, &s, num_parts, this_part + 1, + &extra_mem, extra_mem_size); + if (IS_ERR(parts)) + return parts; + } else { + /* this is the last partition: allocate space for all */ + int alloc_size; + + *num_parts = this_part + 1; + alloc_size = *num_parts * sizeof(struct mtd_partition) + + extra_mem_size; + + parts = kzalloc(alloc_size, GFP_KERNEL); + if (!parts) + return ERR_PTR(-ENOMEM); + extra_mem = (unsigned char *)(parts + *num_parts); + } + + /* + * enter this partition (offset will be calculated later if it is + * OFFSET_CONTINUOUS at this point) + */ + parts[this_part].size = size; + parts[this_part].offset = offset; + parts[this_part].mask_flags = mask_flags; + parts[this_part].add_flags = add_flags; + if (name) + strlcpy(extra_mem, name, name_len + 1); + else + sprintf(extra_mem, "Partition_%03d", this_part); + parts[this_part].name = extra_mem; + extra_mem += name_len + 1; + + dbg(("partition %d: name <%s>, offset %llx, size %llx, mask flags %x\n", + this_part, parts[this_part].name, parts[this_part].offset, + parts[this_part].size, parts[this_part].mask_flags)); + + /* return (updated) pointer to extra_mem memory */ + if (extra_mem_ptr) + *extra_mem_ptr = extra_mem; + + /* return (updated) pointer command line string */ + *retptr = s; + + /* return partition table */ + return parts; +} + +/* + * Parse the command line. + */ +static int mtdpart_setup_real(char *s) +{ + cmdline_parsed = 1; + + for( ; s != NULL; ) + { + struct cmdline_mtd_partition *this_mtd; + struct mtd_partition *parts; + int mtd_id_len, num_parts; + char *p, *mtd_id, *semicol, *open_parenth; + + /* + * Replace the first ';' by a NULL char so strrchr can work + * properly. + */ + semicol = strchr(s, ';'); + if (semicol) + *semicol = '\0'; + + /* + * make sure that part-names with ":" will not be handled as + * part of the mtd-id with an ":" + */ + open_parenth = strchr(s, '('); + if (open_parenth) + *open_parenth = '\0'; + + mtd_id = s; + + /* + * fetch <mtd-id>. We use strrchr to ignore all ':' that could + * be present in the MTD name, only the last one is interpreted + * as an <mtd-id>/<part-definition> separator. + */ + p = strrchr(s, ':'); + + /* Restore the '(' now. */ + if (open_parenth) + *open_parenth = '('; + + /* Restore the ';' now. */ + if (semicol) + *semicol = ';'; + + if (!p) { + pr_err("no mtd-id\n"); + return -EINVAL; + } + mtd_id_len = p - mtd_id; + + dbg(("parsing <%s>\n", p+1)); + + /* + * parse one mtd. have it reserve memory for the + * struct cmdline_mtd_partition and the mtd-id string. + */ + parts = newpart(p + 1, /* cmdline */ + &s, /* out: updated cmdline ptr */ + &num_parts, /* out: number of parts */ + 0, /* first partition */ + (unsigned char**)&this_mtd, /* out: extra mem */ + mtd_id_len + 1 + sizeof(*this_mtd) + + sizeof(void*)-1 /*alignment*/); + if (IS_ERR(parts)) { + /* + * An error occurred. We're either: + * a) out of memory, or + * b) in the middle of the partition spec + * Either way, this mtd is hosed and we're + * unlikely to succeed in parsing any more + */ + return PTR_ERR(parts); + } + + /* align this_mtd */ + this_mtd = (struct cmdline_mtd_partition *) + ALIGN((unsigned long)this_mtd, sizeof(void *)); + /* enter results */ + this_mtd->parts = parts; + this_mtd->num_parts = num_parts; + this_mtd->mtd_id = (char*)(this_mtd + 1); + strlcpy(this_mtd->mtd_id, mtd_id, mtd_id_len + 1); + + /* link into chain */ + this_mtd->next = partitions; + partitions = this_mtd; + + dbg(("mtdid=<%s> num_parts=<%d>\n", + this_mtd->mtd_id, this_mtd->num_parts)); + + + /* EOS - we're done */ + if (*s == 0) + break; + + /* does another spec follow? */ + if (*s != ';') { + pr_err("bad character after partition (%c)\n", *s); + return -EINVAL; + } + s++; + } + + return 0; +} + +/* + * Main function to be called from the MTD mapping driver/device to + * obtain the partitioning information. At this point the command line + * arguments will actually be parsed and turned to struct mtd_partition + * information. It returns partitions for the requested mtd device, or + * the first one in the chain if a NULL mtd_id is passed in. + */ +static int parse_cmdline_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + unsigned long long offset; + int i, err; + struct cmdline_mtd_partition *part; + const char *mtd_id = master->name; + + /* parse command line */ + if (!cmdline_parsed) { + err = mtdpart_setup_real(cmdline); + if (err) + return err; + } + + /* + * Search for the partition definition matching master->name. + * If master->name is not set, stop at first partition definition. + */ + for (part = partitions; part; part = part->next) { + if ((!mtd_id) || (!strcmp(part->mtd_id, mtd_id))) + break; + } + + if (!part) + return 0; + + for (i = 0, offset = 0; i < part->num_parts; i++) { + if (part->parts[i].offset == OFFSET_CONTINUOUS) + part->parts[i].offset = offset; + else + offset = part->parts[i].offset; + + if (part->parts[i].size == SIZE_REMAINING) + part->parts[i].size = master->size - offset; + + if (offset + part->parts[i].size > master->size) { + pr_warn("%s: partitioning exceeds flash size, truncating\n", + part->mtd_id); + part->parts[i].size = master->size - offset; + } + offset += part->parts[i].size; + + if (part->parts[i].size == 0) { + pr_warn("%s: skipping zero sized partition\n", + part->mtd_id); + part->num_parts--; + memmove(&part->parts[i], &part->parts[i + 1], + sizeof(*part->parts) * (part->num_parts - i)); + i--; + } + } + + *pparts = kmemdup(part->parts, sizeof(*part->parts) * part->num_parts, + GFP_KERNEL); + if (!*pparts) + return -ENOMEM; + + return part->num_parts; +} + + +/* + * This is the handler for our kernel parameter, called from + * main.c::checksetup(). Note that we can not yet kmalloc() anything, + * so we only save the commandline for later processing. + * + * This function needs to be visible for bootloaders. + */ +static int __init mtdpart_setup(char *s) +{ + cmdline = s; + return 1; +} + +__setup("mtdparts=", mtdpart_setup); + +static struct mtd_part_parser cmdline_parser = { + .parse_fn = parse_cmdline_partitions, + .name = "cmdlinepart", +}; + +static int __init cmdline_parser_init(void) +{ + if (mtdparts) + mtdpart_setup(mtdparts); + register_mtd_parser(&cmdline_parser); + return 0; +} + +static void __exit cmdline_parser_exit(void) +{ + deregister_mtd_parser(&cmdline_parser); +} + +module_init(cmdline_parser_init); +module_exit(cmdline_parser_exit); + +MODULE_PARM_DESC(mtdparts, "Partitioning specification"); +module_param(mtdparts, charp, 0); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>"); +MODULE_DESCRIPTION("Command line configuration of MTD partitions"); diff --git a/drivers/mtd/parsers/ofpart.c b/drivers/mtd/parsers/ofpart.c new file mode 100644 index 000000000..daf507c12 --- /dev/null +++ b/drivers/mtd/parsers/ofpart.c @@ -0,0 +1,239 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Flash partitions described by the OF (or flattened) device tree + * + * Copyright © 2006 MontaVista Software Inc. + * Author: Vitaly Wool <vwool@ru.mvista.com> + * + * Revised to handle newer style flash binding by: + * Copyright © 2007 David Gibson, IBM Corporation. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/of.h> +#include <linux/mtd/mtd.h> +#include <linux/slab.h> +#include <linux/mtd/partitions.h> + +static bool node_has_compatible(struct device_node *pp) +{ + return of_get_property(pp, "compatible", NULL); +} + +static int parse_fixed_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_partition *parts; + struct device_node *mtd_node; + struct device_node *ofpart_node; + const char *partname; + struct device_node *pp; + int nr_parts, i, ret = 0; + bool dedicated = true; + + + /* Pull of_node from the master device node */ + mtd_node = mtd_get_of_node(master); + if (!mtd_node) + return 0; + + ofpart_node = of_get_child_by_name(mtd_node, "partitions"); + if (!ofpart_node) { + /* + * We might get here even when ofpart isn't used at all (e.g., + * when using another parser), so don't be louder than + * KERN_DEBUG + */ + pr_debug("%s: 'partitions' subnode not found on %pOF. Trying to parse direct subnodes as partitions.\n", + master->name, mtd_node); + ofpart_node = mtd_node; + dedicated = false; + } else if (!of_device_is_compatible(ofpart_node, "fixed-partitions")) { + /* The 'partitions' subnode might be used by another parser */ + return 0; + } + + /* First count the subnodes */ + nr_parts = 0; + for_each_child_of_node(ofpart_node, pp) { + if (!dedicated && node_has_compatible(pp)) + continue; + + nr_parts++; + } + + if (nr_parts == 0) + return 0; + + parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL); + if (!parts) + return -ENOMEM; + + i = 0; + for_each_child_of_node(ofpart_node, pp) { + const __be32 *reg; + int len; + int a_cells, s_cells; + + if (!dedicated && node_has_compatible(pp)) + continue; + + reg = of_get_property(pp, "reg", &len); + if (!reg) { + if (dedicated) { + pr_debug("%s: ofpart partition %pOF (%pOF) missing reg property.\n", + master->name, pp, + mtd_node); + goto ofpart_fail; + } else { + nr_parts--; + continue; + } + } + + a_cells = of_n_addr_cells(pp); + s_cells = of_n_size_cells(pp); + if (len / 4 != a_cells + s_cells) { + pr_debug("%s: ofpart partition %pOF (%pOF) error parsing reg property.\n", + master->name, pp, + mtd_node); + goto ofpart_fail; + } + + parts[i].offset = of_read_number(reg, a_cells); + parts[i].size = of_read_number(reg + a_cells, s_cells); + parts[i].of_node = pp; + + partname = of_get_property(pp, "label", &len); + if (!partname) + partname = of_get_property(pp, "name", &len); + parts[i].name = partname; + + if (of_get_property(pp, "read-only", &len)) + parts[i].mask_flags |= MTD_WRITEABLE; + + if (of_get_property(pp, "lock", &len)) + parts[i].mask_flags |= MTD_POWERUP_LOCK; + + if (of_property_read_bool(pp, "slc-mode")) + parts[i].add_flags |= MTD_SLC_ON_MLC_EMULATION; + + i++; + } + + if (!nr_parts) + goto ofpart_none; + + *pparts = parts; + return nr_parts; + +ofpart_fail: + pr_err("%s: error parsing ofpart partition %pOF (%pOF)\n", + master->name, pp, mtd_node); + ret = -EINVAL; +ofpart_none: + of_node_put(pp); + kfree(parts); + return ret; +} + +static const struct of_device_id parse_ofpart_match_table[] = { + { .compatible = "fixed-partitions" }, + {}, +}; +MODULE_DEVICE_TABLE(of, parse_ofpart_match_table); + +static struct mtd_part_parser ofpart_parser = { + .parse_fn = parse_fixed_partitions, + .name = "fixed-partitions", + .of_match_table = parse_ofpart_match_table, +}; + +static int parse_ofoldpart_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_partition *parts; + struct device_node *dp; + int i, plen, nr_parts; + const struct { + __be32 offset, len; + } *part; + const char *names; + + /* Pull of_node from the master device node */ + dp = mtd_get_of_node(master); + if (!dp) + return 0; + + part = of_get_property(dp, "partitions", &plen); + if (!part) + return 0; /* No partitions found */ + + pr_warn("Device tree uses obsolete partition map binding: %pOF\n", dp); + + nr_parts = plen / sizeof(part[0]); + + parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL); + if (!parts) + return -ENOMEM; + + names = of_get_property(dp, "partition-names", &plen); + + for (i = 0; i < nr_parts; i++) { + parts[i].offset = be32_to_cpu(part->offset); + parts[i].size = be32_to_cpu(part->len) & ~1; + /* bit 0 set signifies read only partition */ + if (be32_to_cpu(part->len) & 1) + parts[i].mask_flags = MTD_WRITEABLE; + + if (names && (plen > 0)) { + int len = strlen(names) + 1; + + parts[i].name = names; + plen -= len; + names += len; + } else { + parts[i].name = "unnamed"; + } + + part++; + } + + *pparts = parts; + return nr_parts; +} + +static struct mtd_part_parser ofoldpart_parser = { + .parse_fn = parse_ofoldpart_partitions, + .name = "ofoldpart", +}; + +static int __init ofpart_parser_init(void) +{ + register_mtd_parser(&ofpart_parser); + register_mtd_parser(&ofoldpart_parser); + return 0; +} + +static void __exit ofpart_parser_exit(void) +{ + deregister_mtd_parser(&ofpart_parser); + deregister_mtd_parser(&ofoldpart_parser); +} + +module_init(ofpart_parser_init); +module_exit(ofpart_parser_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Parser for MTD partitioning information in device tree"); +MODULE_AUTHOR("Vitaly Wool, David Gibson"); +/* + * When MTD core cannot find the requested parser, it tries to load the module + * with the same name. Since we provide the ofoldpart parser, we should have + * the corresponding alias. + */ +MODULE_ALIAS("fixed-partitions"); +MODULE_ALIAS("ofoldpart"); diff --git a/drivers/mtd/parsers/parser_imagetag.c b/drivers/mtd/parsers/parser_imagetag.c new file mode 100644 index 000000000..fab0949aa --- /dev/null +++ b/drivers/mtd/parsers/parser_imagetag.c @@ -0,0 +1,221 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * BCM63XX CFE image tag parser + * + * Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org> + * Mike Albon <malbon@openwrt.org> + * Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net> + * Copyright © 2011-2013 Jonas Gorski <jonas.gorski@gmail.com> + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/bcm963xx_tag.h> +#include <linux/crc32.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sizes.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/of.h> + +/* Ensure strings read from flash structs are null terminated */ +#define STR_NULL_TERMINATE(x) \ + do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0) + +static int bcm963xx_read_imagetag(struct mtd_info *master, const char *name, + loff_t tag_offset, struct bcm_tag *buf) +{ + int ret; + size_t retlen; + u32 computed_crc; + + ret = mtd_read(master, tag_offset, sizeof(*buf), &retlen, (void *)buf); + if (ret) + return ret; + + if (retlen != sizeof(*buf)) + return -EIO; + + computed_crc = crc32_le(IMAGETAG_CRC_START, (u8 *)buf, + offsetof(struct bcm_tag, header_crc)); + if (computed_crc == buf->header_crc) { + STR_NULL_TERMINATE(buf->board_id); + STR_NULL_TERMINATE(buf->tag_version); + + pr_info("%s: CFE image tag found at 0x%llx with version %s, board type %s\n", + name, tag_offset, buf->tag_version, buf->board_id); + + return 0; + } + + pr_warn("%s: CFE image tag at 0x%llx CRC invalid (expected %08x, actual %08x)\n", + name, tag_offset, buf->header_crc, computed_crc); + return -EINVAL; +} + +static int bcm963xx_parse_imagetag_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + /* CFE, NVRAM and global Linux are always present */ + int nrparts = 0, curpart = 0; + struct bcm_tag *buf = NULL; + struct mtd_partition *parts; + int ret; + unsigned int rootfsaddr, kerneladdr, spareaddr, offset; + unsigned int rootfslen, kernellen, sparelen, totallen; + int i; + bool rootfs_first = false; + + buf = vmalloc(sizeof(struct bcm_tag)); + if (!buf) + return -ENOMEM; + + /* Get the tag */ + ret = bcm963xx_read_imagetag(master, "rootfs", 0, buf); + if (!ret) { + STR_NULL_TERMINATE(buf->flash_image_start); + if (kstrtouint(buf->flash_image_start, 10, &rootfsaddr) || + rootfsaddr < BCM963XX_EXTENDED_SIZE) { + pr_err("invalid rootfs address: %*ph\n", + (int)sizeof(buf->flash_image_start), + buf->flash_image_start); + ret = -EINVAL; + goto out; + } + + STR_NULL_TERMINATE(buf->kernel_address); + if (kstrtouint(buf->kernel_address, 10, &kerneladdr) || + kerneladdr < BCM963XX_EXTENDED_SIZE) { + pr_err("invalid kernel address: %*ph\n", + (int)sizeof(buf->kernel_address), + buf->kernel_address); + ret = -EINVAL; + goto out; + } + + STR_NULL_TERMINATE(buf->kernel_length); + if (kstrtouint(buf->kernel_length, 10, &kernellen)) { + pr_err("invalid kernel length: %*ph\n", + (int)sizeof(buf->kernel_length), + buf->kernel_length); + ret = -EINVAL; + goto out; + } + + STR_NULL_TERMINATE(buf->total_length); + if (kstrtouint(buf->total_length, 10, &totallen)) { + pr_err("invalid total length: %*ph\n", + (int)sizeof(buf->total_length), + buf->total_length); + ret = -EINVAL; + goto out; + } + + /* + * Addresses are flash absolute, so convert to partition + * relative addresses. Assume either kernel or rootfs will + * directly follow the image tag. + */ + if (rootfsaddr < kerneladdr) + offset = rootfsaddr - sizeof(struct bcm_tag); + else + offset = kerneladdr - sizeof(struct bcm_tag); + + kerneladdr = kerneladdr - offset; + rootfsaddr = rootfsaddr - offset; + spareaddr = roundup(totallen, master->erasesize); + + if (rootfsaddr < kerneladdr) { + /* default Broadcom layout */ + rootfslen = kerneladdr - rootfsaddr; + rootfs_first = true; + } else { + /* OpenWrt layout */ + rootfsaddr = kerneladdr + kernellen; + rootfslen = spareaddr - rootfsaddr; + } + } else { + goto out; + } + sparelen = master->size - spareaddr; + + /* Determine number of partitions */ + if (rootfslen > 0) + nrparts++; + + if (kernellen > 0) + nrparts++; + + parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL); + if (!parts) { + ret = -ENOMEM; + goto out; + } + + /* Start building partition list */ + if (kernellen > 0) { + int kernelpart = curpart; + + if (rootfslen > 0 && rootfs_first) + kernelpart++; + parts[kernelpart].name = "kernel"; + parts[kernelpart].offset = kerneladdr; + parts[kernelpart].size = kernellen; + curpart++; + } + + if (rootfslen > 0) { + int rootfspart = curpart; + + if (kernellen > 0 && rootfs_first) + rootfspart--; + parts[rootfspart].name = "rootfs"; + parts[rootfspart].offset = rootfsaddr; + parts[rootfspart].size = rootfslen; + if (sparelen > 0 && !rootfs_first) + parts[rootfspart].size += sparelen; + curpart++; + } + + for (i = 0; i < nrparts; i++) + pr_info("Partition %d is %s offset %llx and length %llx\n", i, + parts[i].name, parts[i].offset, parts[i].size); + + pr_info("Spare partition is offset %x and length %x\n", spareaddr, + sparelen); + + *pparts = parts; + ret = 0; + +out: + vfree(buf); + + if (ret) + return ret; + + return nrparts; +} + +static const struct of_device_id parse_bcm963xx_imagetag_match_table[] = { + { .compatible = "brcm,bcm963xx-imagetag" }, + {}, +}; +MODULE_DEVICE_TABLE(of, parse_bcm963xx_imagetag_match_table); + +static struct mtd_part_parser bcm963xx_imagetag_parser = { + .parse_fn = bcm963xx_parse_imagetag_partitions, + .name = "bcm963xx-imagetag", + .of_match_table = parse_bcm963xx_imagetag_match_table, +}; +module_mtd_part_parser(bcm963xx_imagetag_parser); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Daniel Dickinson <openwrt@cshore.neomailbox.net>"); +MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); +MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>"); +MODULE_AUTHOR("Jonas Gorski <jonas.gorski@gmail.com>"); +MODULE_DESCRIPTION("MTD parser for BCM963XX CFE Image Tag partitions"); diff --git a/drivers/mtd/parsers/parser_trx.c b/drivers/mtd/parsers/parser_trx.c new file mode 100644 index 000000000..854118213 --- /dev/null +++ b/drivers/mtd/parsers/parser_trx.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Parser for TRX format partitions + * + * Copyright (C) 2012 - 2017 Rafał Miłecki <rafal@milecki.pl> + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +#define TRX_PARSER_MAX_PARTS 4 + +/* Magics */ +#define TRX_MAGIC 0x30524448 +#define UBI_EC_MAGIC 0x23494255 /* UBI# */ + +struct trx_header { + uint32_t magic; + uint32_t length; + uint32_t crc32; + uint16_t flags; + uint16_t version; + uint32_t offset[3]; +} __packed; + +static const char *parser_trx_data_part_name(struct mtd_info *master, + size_t offset) +{ + uint32_t buf; + size_t bytes_read; + int err; + + err = mtd_read(master, offset, sizeof(buf), &bytes_read, + (uint8_t *)&buf); + if (err && !mtd_is_bitflip(err)) { + pr_err("mtd_read error while parsing (offset: 0x%zX): %d\n", + offset, err); + goto out_default; + } + + if (buf == UBI_EC_MAGIC) + return "ubi"; + +out_default: + return "rootfs"; +} + +static int parser_trx_parse(struct mtd_info *mtd, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_partition *parts; + struct mtd_partition *part; + struct trx_header trx; + size_t bytes_read; + uint8_t curr_part = 0, i = 0; + int err; + + parts = kcalloc(TRX_PARSER_MAX_PARTS, sizeof(struct mtd_partition), + GFP_KERNEL); + if (!parts) + return -ENOMEM; + + err = mtd_read(mtd, 0, sizeof(trx), &bytes_read, (uint8_t *)&trx); + if (err) { + pr_err("MTD reading error: %d\n", err); + kfree(parts); + return err; + } + + if (trx.magic != TRX_MAGIC) { + kfree(parts); + return -ENOENT; + } + + /* We have LZMA loader if there is address in offset[2] */ + if (trx.offset[2]) { + part = &parts[curr_part++]; + part->name = "loader"; + part->offset = trx.offset[i]; + i++; + } + + if (trx.offset[i]) { + part = &parts[curr_part++]; + part->name = "linux"; + part->offset = trx.offset[i]; + i++; + } + + if (trx.offset[i]) { + part = &parts[curr_part++]; + part->name = parser_trx_data_part_name(mtd, trx.offset[i]); + part->offset = trx.offset[i]; + i++; + } + + /* + * Assume that every partition ends at the beginning of the one it is + * followed by. + */ + for (i = 0; i < curr_part; i++) { + u64 next_part_offset = (i < curr_part - 1) ? + parts[i + 1].offset : mtd->size; + + parts[i].size = next_part_offset - parts[i].offset; + } + + *pparts = parts; + return i; +}; + +static const struct of_device_id mtd_parser_trx_of_match_table[] = { + { .compatible = "brcm,trx" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtd_parser_trx_of_match_table); + +static struct mtd_part_parser mtd_parser_trx = { + .parse_fn = parser_trx_parse, + .name = "trx", + .of_match_table = mtd_parser_trx_of_match_table, +}; +module_mtd_part_parser(mtd_parser_trx); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Parser for TRX format partitions"); diff --git a/drivers/mtd/parsers/redboot.c b/drivers/mtd/parsers/redboot.c new file mode 100644 index 000000000..4f3bcc59a --- /dev/null +++ b/drivers/mtd/parsers/redboot.c @@ -0,0 +1,324 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Parse RedBoot-style Flash Image System (FIS) tables and + * produce a Linux partition array to match. + * + * Copyright © 2001 Red Hat UK Limited + * Copyright © 2001-2010 David Woodhouse <dwmw2@infradead.org> + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/vmalloc.h> +#include <linux/of.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/module.h> + +struct fis_image_desc { + unsigned char name[16]; // Null terminated name + uint32_t flash_base; // Address within FLASH of image + uint32_t mem_base; // Address in memory where it executes + uint32_t size; // Length of image + uint32_t entry_point; // Execution entry point + uint32_t data_length; // Length of actual data + unsigned char _pad[256-(16+7*sizeof(uint32_t))]; + uint32_t desc_cksum; // Checksum over image descriptor + uint32_t file_cksum; // Checksum over image data +}; + +struct fis_list { + struct fis_image_desc *img; + struct fis_list *next; +}; + +static int directory = CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK; +module_param(directory, int, 0); + +static inline int redboot_checksum(struct fis_image_desc *img) +{ + /* RedBoot doesn't actually write the desc_cksum field yet AFAICT */ + return 1; +} + +static void parse_redboot_of(struct mtd_info *master) +{ + struct device_node *np; + struct device_node *npart; + u32 dirblock; + int ret; + + np = mtd_get_of_node(master); + if (!np) + return; + + npart = of_get_child_by_name(np, "partitions"); + if (!npart) + return; + + ret = of_property_read_u32(npart, "fis-index-block", &dirblock); + of_node_put(npart); + if (ret) + return; + + /* + * Assign the block found in the device tree to the local + * directory block pointer. + */ + directory = dirblock; +} + +static int parse_redboot_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + int nrparts = 0; + struct fis_image_desc *buf; + struct mtd_partition *parts; + struct fis_list *fl = NULL, *tmp_fl; + int ret, i; + size_t retlen; + char *names; + char *nullname; + int namelen = 0; + int nulllen = 0; + int numslots; + unsigned long offset; +#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED + static char nullstring[] = "unallocated"; +#endif + + parse_redboot_of(master); + + if ( directory < 0 ) { + offset = master->size + directory * master->erasesize; + while (mtd_block_isbad(master, offset)) { + if (!offset) { + nogood: + printk(KERN_NOTICE "Failed to find a non-bad block to check for RedBoot partition table\n"); + return -EIO; + } + offset -= master->erasesize; + } + } else { + offset = directory * master->erasesize; + while (mtd_block_isbad(master, offset)) { + offset += master->erasesize; + if (offset == master->size) + goto nogood; + } + } + buf = vmalloc(master->erasesize); + + if (!buf) + return -ENOMEM; + + printk(KERN_NOTICE "Searching for RedBoot partition table in %s at offset 0x%lx\n", + master->name, offset); + + ret = mtd_read(master, offset, master->erasesize, &retlen, + (void *)buf); + + if (ret) + goto out; + + if (retlen != master->erasesize) { + ret = -EIO; + goto out; + } + + numslots = (master->erasesize / sizeof(struct fis_image_desc)); + for (i = 0; i < numslots; i++) { + if (!memcmp(buf[i].name, "FIS directory", 14)) { + /* This is apparently the FIS directory entry for the + * FIS directory itself. The FIS directory size is + * one erase block; if the buf[i].size field is + * swab32(erasesize) then we know we are looking at + * a byte swapped FIS directory - swap all the entries! + * (NOTE: this is 'size' not 'data_length'; size is + * the full size of the entry.) + */ + + /* RedBoot can combine the FIS directory and + config partitions into a single eraseblock; + we assume wrong-endian if either the swapped + 'size' matches the eraseblock size precisely, + or if the swapped size actually fits in an + eraseblock while the unswapped size doesn't. */ + if (swab32(buf[i].size) == master->erasesize || + (buf[i].size > master->erasesize + && swab32(buf[i].size) < master->erasesize)) { + int j; + /* Update numslots based on actual FIS directory size */ + numslots = swab32(buf[i].size) / sizeof (struct fis_image_desc); + for (j = 0; j < numslots; ++j) { + + /* A single 0xff denotes a deleted entry. + * Two of them in a row is the end of the table. + */ + if (buf[j].name[0] == 0xff) { + if (buf[j].name[1] == 0xff) { + break; + } else { + continue; + } + } + + /* The unsigned long fields were written with the + * wrong byte sex, name and pad have no byte sex. + */ + swab32s(&buf[j].flash_base); + swab32s(&buf[j].mem_base); + swab32s(&buf[j].size); + swab32s(&buf[j].entry_point); + swab32s(&buf[j].data_length); + swab32s(&buf[j].desc_cksum); + swab32s(&buf[j].file_cksum); + } + } else if (buf[i].size < master->erasesize) { + /* Update numslots based on actual FIS directory size */ + numslots = buf[i].size / sizeof(struct fis_image_desc); + } + break; + } + } + if (i == numslots) { + /* Didn't find it */ + printk(KERN_NOTICE "No RedBoot partition table detected in %s\n", + master->name); + ret = 0; + goto out; + } + + for (i = 0; i < numslots; i++) { + struct fis_list *new_fl, **prev; + + if (buf[i].name[0] == 0xff) { + if (buf[i].name[1] == 0xff) { + break; + } else { + continue; + } + } + if (!redboot_checksum(&buf[i])) + break; + + new_fl = kmalloc(sizeof(struct fis_list), GFP_KERNEL); + namelen += strlen(buf[i].name)+1; + if (!new_fl) { + ret = -ENOMEM; + goto out; + } + new_fl->img = &buf[i]; + if (data && data->origin) + buf[i].flash_base -= data->origin; + else + buf[i].flash_base &= master->size-1; + + /* I'm sure the JFFS2 code has done me permanent damage. + * I now think the following is _normal_ + */ + prev = &fl; + while(*prev && (*prev)->img->flash_base < new_fl->img->flash_base) + prev = &(*prev)->next; + new_fl->next = *prev; + *prev = new_fl; + + nrparts++; + } +#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED + if (fl->img->flash_base) { + nrparts++; + nulllen = sizeof(nullstring); + } + + for (tmp_fl = fl; tmp_fl->next; tmp_fl = tmp_fl->next) { + if (tmp_fl->img->flash_base + tmp_fl->img->size + master->erasesize <= tmp_fl->next->img->flash_base) { + nrparts++; + nulllen = sizeof(nullstring); + } + } +#endif + parts = kzalloc(sizeof(*parts)*nrparts + nulllen + namelen, GFP_KERNEL); + + if (!parts) { + ret = -ENOMEM; + goto out; + } + + nullname = (char *)&parts[nrparts]; +#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED + if (nulllen > 0) { + strcpy(nullname, nullstring); + } +#endif + names = nullname + nulllen; + + i=0; + +#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED + if (fl->img->flash_base) { + parts[0].name = nullname; + parts[0].size = fl->img->flash_base; + parts[0].offset = 0; + i++; + } +#endif + for ( ; i<nrparts; i++) { + parts[i].size = fl->img->size; + parts[i].offset = fl->img->flash_base; + parts[i].name = names; + + strcpy(names, fl->img->name); +#ifdef CONFIG_MTD_REDBOOT_PARTS_READONLY + if (!memcmp(names, "RedBoot", 8) || + !memcmp(names, "RedBoot config", 15) || + !memcmp(names, "FIS directory", 14)) { + parts[i].mask_flags = MTD_WRITEABLE; + } +#endif + names += strlen(names)+1; + +#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED + if(fl->next && fl->img->flash_base + fl->img->size + master->erasesize <= fl->next->img->flash_base) { + i++; + parts[i].offset = parts[i-1].size + parts[i-1].offset; + parts[i].size = fl->next->img->flash_base - parts[i].offset; + parts[i].name = nullname; + } +#endif + tmp_fl = fl; + fl = fl->next; + kfree(tmp_fl); + } + ret = nrparts; + *pparts = parts; + out: + while (fl) { + struct fis_list *old = fl; + fl = fl->next; + kfree(old); + } + vfree(buf); + return ret; +} + +static const struct of_device_id mtd_parser_redboot_of_match_table[] = { + { .compatible = "redboot-fis" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtd_parser_redboot_of_match_table); + +static struct mtd_part_parser redboot_parser = { + .parse_fn = parse_redboot_partitions, + .name = "RedBoot", + .of_match_table = mtd_parser_redboot_of_match_table, +}; +module_mtd_part_parser(redboot_parser); + +/* mtd parsers will request the module by parser name */ +MODULE_ALIAS("RedBoot"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); +MODULE_DESCRIPTION("Parsing code for RedBoot Flash Image System (FIS) tables"); diff --git a/drivers/mtd/parsers/sharpslpart.c b/drivers/mtd/parsers/sharpslpart.c new file mode 100644 index 000000000..671a61845 --- /dev/null +++ b/drivers/mtd/parsers/sharpslpart.c @@ -0,0 +1,399 @@ +/* + * sharpslpart.c - MTD partition parser for NAND flash using the SHARP FTL + * for logical addressing, as used on the PXA models of the SHARP SL Series. + * + * Copyright (C) 2017 Andrea Adami <andrea.adami@gmail.com> + * + * Based on SHARP GPL 2.4 sources: + * http://support.ezaurus.com/developer/source/source_dl.asp + * drivers/mtd/nand/sharp_sl_logical.c + * linux/include/asm-arm/sharp_nand_logical.h + * + * Copyright (C) 2002 SHARP + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/bitops.h> +#include <linux/sizes.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +/* oob structure */ +#define NAND_NOOB_LOGADDR_00 8 +#define NAND_NOOB_LOGADDR_01 9 +#define NAND_NOOB_LOGADDR_10 10 +#define NAND_NOOB_LOGADDR_11 11 +#define NAND_NOOB_LOGADDR_20 12 +#define NAND_NOOB_LOGADDR_21 13 + +#define BLOCK_IS_RESERVED 0xffff +#define BLOCK_UNMASK_COMPLEMENT 1 + +/* factory defaults */ +#define SHARPSL_NAND_PARTS 3 +#define SHARPSL_FTL_PART_SIZE (7 * SZ_1M) +#define SHARPSL_PARTINFO1_LADDR 0x00060000 +#define SHARPSL_PARTINFO2_LADDR 0x00064000 + +#define BOOT_MAGIC 0x424f4f54 +#define FSRO_MAGIC 0x4653524f +#define FSRW_MAGIC 0x46535257 + +/** + * struct sharpsl_ftl - Sharp FTL Logical Table + * @logmax: number of logical blocks + * @log2phy: the logical-to-physical table + * + * Structure containing the logical-to-physical translation table + * used by the SHARP SL FTL. + */ +struct sharpsl_ftl { + unsigned int logmax; + unsigned int *log2phy; +}; + +/* verify that the OOB bytes 8 to 15 are free and available for the FTL */ +static int sharpsl_nand_check_ooblayout(struct mtd_info *mtd) +{ + u8 freebytes = 0; + int section = 0; + + while (true) { + struct mtd_oob_region oobfree = { }; + int ret, i; + + ret = mtd_ooblayout_free(mtd, section++, &oobfree); + if (ret) + break; + + if (!oobfree.length || oobfree.offset > 15 || + (oobfree.offset + oobfree.length) < 8) + continue; + + i = oobfree.offset >= 8 ? oobfree.offset : 8; + for (; i < oobfree.offset + oobfree.length && i < 16; i++) + freebytes |= BIT(i - 8); + + if (freebytes == 0xff) + return 0; + } + + return -ENOTSUPP; +} + +static int sharpsl_nand_read_oob(struct mtd_info *mtd, loff_t offs, u8 *buf) +{ + struct mtd_oob_ops ops = { }; + int ret; + + ops.mode = MTD_OPS_PLACE_OOB; + ops.ooblen = mtd->oobsize; + ops.oobbuf = buf; + + ret = mtd_read_oob(mtd, offs, &ops); + if (ret != 0 || mtd->oobsize != ops.oobretlen) + return -1; + + return 0; +} + +/* + * The logical block number assigned to a physical block is stored in the OOB + * of the first page, in 3 16-bit copies with the following layout: + * + * 01234567 89abcdef + * -------- -------- + * ECC BB xyxyxy + * + * When reading we check that the first two copies agree. + * In case of error, matching is tried using the following pairs. + * Reserved values 0xffff mean the block is kept for wear leveling. + * + * 01234567 89abcdef + * -------- -------- + * ECC BB xyxy oob[8]==oob[10] && oob[9]==oob[11] -> byte0=8 byte1=9 + * ECC BB xyxy oob[10]==oob[12] && oob[11]==oob[13] -> byte0=10 byte1=11 + * ECC BB xy xy oob[12]==oob[8] && oob[13]==oob[9] -> byte0=12 byte1=13 + */ +static int sharpsl_nand_get_logical_num(u8 *oob) +{ + u16 us; + int good0, good1; + + if (oob[NAND_NOOB_LOGADDR_00] == oob[NAND_NOOB_LOGADDR_10] && + oob[NAND_NOOB_LOGADDR_01] == oob[NAND_NOOB_LOGADDR_11]) { + good0 = NAND_NOOB_LOGADDR_00; + good1 = NAND_NOOB_LOGADDR_01; + } else if (oob[NAND_NOOB_LOGADDR_10] == oob[NAND_NOOB_LOGADDR_20] && + oob[NAND_NOOB_LOGADDR_11] == oob[NAND_NOOB_LOGADDR_21]) { + good0 = NAND_NOOB_LOGADDR_10; + good1 = NAND_NOOB_LOGADDR_11; + } else if (oob[NAND_NOOB_LOGADDR_20] == oob[NAND_NOOB_LOGADDR_00] && + oob[NAND_NOOB_LOGADDR_21] == oob[NAND_NOOB_LOGADDR_01]) { + good0 = NAND_NOOB_LOGADDR_20; + good1 = NAND_NOOB_LOGADDR_21; + } else { + return -EINVAL; + } + + us = oob[good0] | oob[good1] << 8; + + /* parity check */ + if (hweight16(us) & BLOCK_UNMASK_COMPLEMENT) + return -EINVAL; + + /* reserved */ + if (us == BLOCK_IS_RESERVED) + return BLOCK_IS_RESERVED; + + return (us >> 1) & GENMASK(9, 0); +} + +static int sharpsl_nand_init_ftl(struct mtd_info *mtd, struct sharpsl_ftl *ftl) +{ + unsigned int block_num, phymax; + int i, ret, log_num; + loff_t block_adr; + u8 *oob; + + oob = kzalloc(mtd->oobsize, GFP_KERNEL); + if (!oob) + return -ENOMEM; + + phymax = mtd_div_by_eb(SHARPSL_FTL_PART_SIZE, mtd); + + /* FTL reserves 5% of the blocks + 1 spare */ + ftl->logmax = ((phymax * 95) / 100) - 1; + + ftl->log2phy = kmalloc_array(ftl->logmax, sizeof(*ftl->log2phy), + GFP_KERNEL); + if (!ftl->log2phy) { + ret = -ENOMEM; + goto exit; + } + + /* initialize ftl->log2phy */ + for (i = 0; i < ftl->logmax; i++) + ftl->log2phy[i] = UINT_MAX; + + /* create physical-logical table */ + for (block_num = 0; block_num < phymax; block_num++) { + block_adr = (loff_t)block_num * mtd->erasesize; + + if (mtd_block_isbad(mtd, block_adr)) + continue; + + if (sharpsl_nand_read_oob(mtd, block_adr, oob)) + continue; + + /* get logical block */ + log_num = sharpsl_nand_get_logical_num(oob); + + /* cut-off errors and skip the out-of-range values */ + if (log_num > 0 && log_num < ftl->logmax) { + if (ftl->log2phy[log_num] == UINT_MAX) + ftl->log2phy[log_num] = block_num; + } + } + + pr_info("Sharp SL FTL: %d blocks used (%d logical, %d reserved)\n", + phymax, ftl->logmax, phymax - ftl->logmax); + + ret = 0; +exit: + kfree(oob); + return ret; +} + +static void sharpsl_nand_cleanup_ftl(struct sharpsl_ftl *ftl) +{ + kfree(ftl->log2phy); +} + +static int sharpsl_nand_read_laddr(struct mtd_info *mtd, + loff_t from, + size_t len, + void *buf, + struct sharpsl_ftl *ftl) +{ + unsigned int log_num, final_log_num; + unsigned int block_num; + loff_t block_adr; + loff_t block_ofs; + size_t retlen; + int err; + + log_num = mtd_div_by_eb((u32)from, mtd); + final_log_num = mtd_div_by_eb(((u32)from + len - 1), mtd); + + if (len <= 0 || log_num >= ftl->logmax || final_log_num > log_num) + return -EINVAL; + + block_num = ftl->log2phy[log_num]; + block_adr = (loff_t)block_num * mtd->erasesize; + block_ofs = mtd_mod_by_eb((u32)from, mtd); + + err = mtd_read(mtd, block_adr + block_ofs, len, &retlen, buf); + /* Ignore corrected ECC errors */ + if (mtd_is_bitflip(err)) + err = 0; + + if (!err && retlen != len) + err = -EIO; + + if (err) + pr_err("sharpslpart: error, read failed at %#llx\n", + block_adr + block_ofs); + + return err; +} + +/* + * MTD Partition Parser + * + * Sample values read from SL-C860 + * + * # cat /proc/mtd + * dev: size erasesize name + * mtd0: 006d0000 00020000 "Filesystem" + * mtd1: 00700000 00004000 "smf" + * mtd2: 03500000 00004000 "root" + * mtd3: 04400000 00004000 "home" + * + * PARTITIONINFO1 + * 0x00060000: 00 00 00 00 00 00 70 00 42 4f 4f 54 00 00 00 00 ......p.BOOT.... + * 0x00060010: 00 00 70 00 00 00 c0 03 46 53 52 4f 00 00 00 00 ..p.....FSRO.... + * 0x00060020: 00 00 c0 03 00 00 00 04 46 53 52 57 00 00 00 00 ........FSRW.... + */ +struct sharpsl_nand_partinfo { + __le32 start; + __le32 end; + __be32 magic; + u32 reserved; +}; + +static int sharpsl_nand_read_partinfo(struct mtd_info *master, + loff_t from, + size_t len, + struct sharpsl_nand_partinfo *buf, + struct sharpsl_ftl *ftl) +{ + int ret; + + ret = sharpsl_nand_read_laddr(master, from, len, buf, ftl); + if (ret) + return ret; + + /* check for magics */ + if (be32_to_cpu(buf[0].magic) != BOOT_MAGIC || + be32_to_cpu(buf[1].magic) != FSRO_MAGIC || + be32_to_cpu(buf[2].magic) != FSRW_MAGIC) { + pr_err("sharpslpart: magic values mismatch\n"); + return -EINVAL; + } + + /* fixup for hardcoded value 64 MiB (for older models) */ + buf[2].end = cpu_to_le32(master->size); + + /* extra sanity check */ + if (le32_to_cpu(buf[0].end) <= le32_to_cpu(buf[0].start) || + le32_to_cpu(buf[1].start) < le32_to_cpu(buf[0].end) || + le32_to_cpu(buf[1].end) <= le32_to_cpu(buf[1].start) || + le32_to_cpu(buf[2].start) < le32_to_cpu(buf[1].end) || + le32_to_cpu(buf[2].end) <= le32_to_cpu(buf[2].start)) { + pr_err("sharpslpart: partition sizes mismatch\n"); + return -EINVAL; + } + + return 0; +} + +static int sharpsl_parse_mtd_partitions(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct sharpsl_ftl ftl; + struct sharpsl_nand_partinfo buf[SHARPSL_NAND_PARTS]; + struct mtd_partition *sharpsl_nand_parts; + int err; + + /* check that OOB bytes 8 to 15 used by the FTL are actually free */ + err = sharpsl_nand_check_ooblayout(master); + if (err) + return err; + + /* init logical mgmt (FTL) */ + err = sharpsl_nand_init_ftl(master, &ftl); + if (err) + return err; + + /* read and validate first partition table */ + pr_info("sharpslpart: try reading first partition table\n"); + err = sharpsl_nand_read_partinfo(master, + SHARPSL_PARTINFO1_LADDR, + sizeof(buf), buf, &ftl); + if (err) { + /* fallback: read second partition table */ + pr_warn("sharpslpart: first partition table is invalid, retry using the second\n"); + err = sharpsl_nand_read_partinfo(master, + SHARPSL_PARTINFO2_LADDR, + sizeof(buf), buf, &ftl); + } + + /* cleanup logical mgmt (FTL) */ + sharpsl_nand_cleanup_ftl(&ftl); + + if (err) { + pr_err("sharpslpart: both partition tables are invalid\n"); + return err; + } + + sharpsl_nand_parts = kcalloc(SHARPSL_NAND_PARTS, + sizeof(*sharpsl_nand_parts), + GFP_KERNEL); + if (!sharpsl_nand_parts) + return -ENOMEM; + + /* original names */ + sharpsl_nand_parts[0].name = "smf"; + sharpsl_nand_parts[0].offset = le32_to_cpu(buf[0].start); + sharpsl_nand_parts[0].size = le32_to_cpu(buf[0].end) - + le32_to_cpu(buf[0].start); + + sharpsl_nand_parts[1].name = "root"; + sharpsl_nand_parts[1].offset = le32_to_cpu(buf[1].start); + sharpsl_nand_parts[1].size = le32_to_cpu(buf[1].end) - + le32_to_cpu(buf[1].start); + + sharpsl_nand_parts[2].name = "home"; + sharpsl_nand_parts[2].offset = le32_to_cpu(buf[2].start); + sharpsl_nand_parts[2].size = le32_to_cpu(buf[2].end) - + le32_to_cpu(buf[2].start); + + *pparts = sharpsl_nand_parts; + return SHARPSL_NAND_PARTS; +} + +static struct mtd_part_parser sharpsl_mtd_parser = { + .parse_fn = sharpsl_parse_mtd_partitions, + .name = "sharpslpart", +}; +module_mtd_part_parser(sharpsl_mtd_parser); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Andrea Adami <andrea.adami@gmail.com>"); +MODULE_DESCRIPTION("MTD partitioning for NAND flash on Sharp SL Series"); 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