| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * (C) Copyright 2000-2004 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| */ |
| #ifndef _PART_H |
| #define _PART_H |
| |
| #include <blk.h> |
| #include <ide.h> |
| #include <uuid.h> |
| #include <linker_lists.h> |
| #include <linux/errno.h> |
| #include <linux/list.h> |
| |
| struct block_drvr { |
| char *name; |
| int (*select_hwpart)(int dev_num, int hwpart); |
| }; |
| |
| #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \ |
| ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \ |
| ((x & 0xffff0000) ? 16 : 0)) |
| #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1)) |
| |
| /* Part types */ |
| #define PART_TYPE_UNKNOWN 0x00 |
| #define PART_TYPE_MAC 0x01 |
| #define PART_TYPE_DOS 0x02 |
| #define PART_TYPE_ISO 0x03 |
| #define PART_TYPE_AMIGA 0x04 |
| #define PART_TYPE_EFI 0x05 |
| |
| /* maximum number of partition entries supported by search */ |
| #define DOS_ENTRY_NUMBERS 8 |
| #define ISO_ENTRY_NUMBERS 64 |
| #define MAC_ENTRY_NUMBERS 64 |
| #define AMIGA_ENTRY_NUMBERS 8 |
| /* |
| * Type string for U-Boot bootable partitions |
| */ |
| #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */ |
| #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */ |
| |
| /* device types */ |
| #define DEV_TYPE_UNKNOWN 0xff /* not connected */ |
| #define DEV_TYPE_HARDDISK 0x00 /* harddisk */ |
| #define DEV_TYPE_TAPE 0x01 /* Tape */ |
| #define DEV_TYPE_CDROM 0x05 /* CD-ROM */ |
| #define DEV_TYPE_OPDISK 0x07 /* optical disk */ |
| |
| #define PART_NAME_LEN 32 |
| #define PART_TYPE_LEN 32 |
| #define MAX_SEARCH_PARTITIONS 128 |
| |
| #define PART_BOOTABLE ((int)BIT(0)) |
| #define PART_EFI_SYSTEM_PARTITION ((int)BIT(1)) |
| |
| struct disk_partition { |
| lbaint_t start; /* # of first block in partition */ |
| lbaint_t size; /* number of blocks in partition */ |
| ulong blksz; /* block size in bytes */ |
| uchar name[PART_NAME_LEN]; /* partition name */ |
| uchar type[PART_TYPE_LEN]; /* string type description */ |
| /* |
| * The bootable is a bitmask with the following fields: |
| * |
| * PART_BOOTABLE the MBR bootable flag is set |
| * PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition |
| */ |
| int bootable; |
| #if CONFIG_IS_ENABLED(PARTITION_UUIDS) |
| char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */ |
| #endif |
| #ifdef CONFIG_PARTITION_TYPE_GUID |
| char type_guid[UUID_STR_LEN + 1]; /* type GUID as string, if exists */ |
| #endif |
| #ifdef CONFIG_DOS_PARTITION |
| uchar sys_ind; /* partition type */ |
| #endif |
| }; |
| |
| struct disk_part { |
| int partnum; |
| struct disk_partition gpt_part_info; |
| struct list_head list; |
| }; |
| |
| /* Misc _get_dev functions */ |
| #if CONFIG_IS_ENABLED(PARTITIONS) |
| /** |
| * blk_get_dev() - get a pointer to a block device given its type and number |
| * |
| * Each interface allocates its own devices and typically struct blk_desc is |
| * contained with the interface's data structure. There is no global |
| * numbering for block devices, so the interface name must be provided. |
| * |
| * @ifname: Interface name (e.g. "ide", "scsi") |
| * @dev: Device number (0 for first device on that interface, 1 for |
| * second, etc. |
| * Return: pointer to the block device, or NULL if not available, or an |
| * error occurred. |
| */ |
| struct blk_desc *blk_get_dev(const char *ifname, int dev); |
| |
| struct blk_desc *mg_disk_get_dev(int dev); |
| |
| /* disk/part.c */ |
| int part_get_info(struct blk_desc *dev_desc, int part, |
| struct disk_partition *info); |
| /** |
| * part_get_info_whole_disk() - get partition info for the special case of |
| * a partition occupying the entire disk. |
| */ |
| int part_get_info_whole_disk(struct blk_desc *dev_desc, |
| struct disk_partition *info); |
| |
| void part_print(struct blk_desc *dev_desc); |
| void part_init(struct blk_desc *dev_desc); |
| void dev_print(struct blk_desc *dev_desc); |
| |
| /** |
| * blk_get_device_by_str() - Get a block device given its interface/hw partition |
| * |
| * Each interface allocates its own devices and typically struct blk_desc is |
| * contained with the interface's data structure. There is no global |
| * numbering for block devices, so the interface name must be provided. |
| * |
| * The hardware parition is not related to the normal software partitioning |
| * of a device - each hardware partition is effectively a separately |
| * accessible block device. When a hardware parition is selected on MMC the |
| * other hardware partitions become inaccessible. The same block device is |
| * used to access all hardware partitions, but its capacity may change when a |
| * different hardware partition is selected. |
| * |
| * When a hardware partition number is given, the block device switches to |
| * that hardware partition. |
| * |
| * @ifname: Interface name (e.g. "ide", "scsi") |
| * @dev_str: Device and optional hw partition. This can either be a string |
| * containing the device number (e.g. "2") or the device number |
| * and hardware partition number (e.g. "2.4") for devices that |
| * support it (currently only MMC). |
| * @dev_desc: Returns a pointer to the block device on success |
| * Return: block device number (local to the interface), or -1 on error |
| */ |
| int blk_get_device_by_str(const char *ifname, const char *dev_str, |
| struct blk_desc **dev_desc); |
| |
| /** |
| * blk_get_device_part_str() - Get a block device and partition |
| * |
| * This calls blk_get_device_by_str() to look up a device. It also looks up |
| * a partition and returns information about it. |
| * |
| * @dev_part_str is in the format: |
| * <dev>.<hw_part>:<part> where <dev> is the device number, |
| * <hw_part> is the optional hardware partition number and |
| * <part> is the partition number |
| * |
| * If ifname is "hostfs" then this function returns the sandbox host block |
| * device. |
| * |
| * If ifname is ubi, then this function returns 0, with @info set to a |
| * special UBI device. |
| * |
| * If @dev_part_str is NULL or empty or "-", then this function looks up |
| * the "bootdevice" environment variable and uses that string instead. |
| * |
| * If the partition string is empty then the first partition is used. If the |
| * partition string is "auto" then the first bootable partition is used. |
| * |
| * @ifname: Interface name (e.g. "ide", "scsi") |
| * @dev_part_str: Device and partition string |
| * @dev_desc: Returns a pointer to the block device on success |
| * @info: Returns partition information |
| * @allow_whole_dev: true to allow the user to select partition 0 |
| * (which means the whole device), false to require a valid |
| * partition number >= 1 |
| * Return: partition number, or -1 on error |
| * |
| */ |
| int blk_get_device_part_str(const char *ifname, const char *dev_part_str, |
| struct blk_desc **dev_desc, |
| struct disk_partition *info, int allow_whole_dev); |
| |
| /** |
| * part_get_info_by_name_type() - Search for a partition by name |
| * for only specified partition type |
| * |
| * @param dev_desc - block device descriptor |
| * @param gpt_name - the specified table entry name |
| * @param info - returns the disk partition info |
| * @param part_type - only search in partitions of this type |
| * |
| * Return: - the partition number on match (starting on 1), -1 on no match, |
| * otherwise error |
| */ |
| int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name, |
| struct disk_partition *info, int part_type); |
| |
| /** |
| * part_get_info_by_name() - Search for a partition by name |
| * among all available registered partitions |
| * |
| * @param dev_desc - block device descriptor |
| * @param gpt_name - the specified table entry name |
| * @param info - returns the disk partition info |
| * |
| * Return: - the partition number on match (starting on 1), -1 on no match, |
| * otherwise error |
| */ |
| int part_get_info_by_name(struct blk_desc *dev_desc, |
| const char *name, struct disk_partition *info); |
| |
| /** |
| * Get partition info from dev number + part name, or dev number + part number. |
| * |
| * Parse a device number and partition description (either name or number) |
| * in the form of device number plus partition name separated by a "#" |
| * (like "device_num#partition_name") or a device number plus a partition number |
| * separated by a ":". For example both "0#misc" and "0:1" can be valid |
| * partition descriptions for a given interface. If the partition is found, sets |
| * dev_desc and part_info accordingly with the information of the partition. |
| * |
| * @param[in] dev_iface Device interface |
| * @param[in] dev_part_str Input partition description, like "0#misc" or "0:1" |
| * @param[out] dev_desc Place to store the device description pointer |
| * @param[out] part_info Place to store the partition information |
| * @param[in] allow_whole_dev true to allow the user to select partition 0 |
| * (which means the whole device), false to require a valid |
| * partition number >= 1 |
| * Return: the partition number on success, or negative errno on error |
| */ |
| int part_get_info_by_dev_and_name_or_num(const char *dev_iface, |
| const char *dev_part_str, |
| struct blk_desc **dev_desc, |
| struct disk_partition *part_info, |
| int allow_whole_dev); |
| |
| /** |
| * part_set_generic_name() - create generic partition like hda1 or sdb2 |
| * |
| * Helper function for partition tables, which don't hold partition names |
| * (DOS, ISO). Generates partition name out of the device type and partition |
| * number. |
| * |
| * @dev_desc: pointer to the block device |
| * @part_num: partition number for which the name is generated |
| * @name: buffer where the name is written |
| */ |
| void part_set_generic_name(const struct blk_desc *dev_desc, |
| int part_num, char *name); |
| |
| extern const struct block_drvr block_drvr[]; |
| #else |
| static inline struct blk_desc *blk_get_dev(const char *ifname, int dev) |
| { return NULL; } |
| static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; } |
| |
| static inline int part_get_info(struct blk_desc *dev_desc, int part, |
| struct disk_partition *info) { return -1; } |
| static inline int part_get_info_whole_disk(struct blk_desc *dev_desc, |
| struct disk_partition *info) |
| { return -1; } |
| static inline void part_print(struct blk_desc *dev_desc) {} |
| static inline void part_init(struct blk_desc *dev_desc) {} |
| static inline void dev_print(struct blk_desc *dev_desc) {} |
| static inline int blk_get_device_by_str(const char *ifname, const char *dev_str, |
| struct blk_desc **dev_desc) |
| { return -1; } |
| static inline int blk_get_device_part_str(const char *ifname, |
| const char *dev_part_str, |
| struct blk_desc **dev_desc, |
| struct disk_partition *info, |
| int allow_whole_dev) |
| { *dev_desc = NULL; return -1; } |
| |
| static inline int part_get_info_by_name_type(struct blk_desc *dev_desc, |
| const char *name, |
| struct disk_partition *info, |
| int part_type) |
| { |
| return -ENOENT; |
| } |
| |
| static inline int part_get_info_by_name(struct blk_desc *dev_desc, |
| const char *name, |
| struct disk_partition *info) |
| { |
| return -ENOENT; |
| } |
| |
| static inline int |
| part_get_info_by_dev_and_name_or_num(const char *dev_iface, |
| const char *dev_part_str, |
| struct blk_desc **dev_desc, |
| struct disk_partition *part_info, |
| int allow_whole_dev) |
| { |
| *dev_desc = NULL; |
| return -ENOSYS; |
| } |
| #endif |
| |
| struct udevice; |
| /** |
| * part_create_block_devices - Create block devices for disk partitions |
| * |
| * Create UCLASS_PARTITION udevices for each of disk partitions in @parent |
| * |
| * @blk_dev: Whole disk device |
| */ |
| int part_create_block_devices(struct udevice *blk_dev); |
| |
| /* |
| * We don't support printing partition information in SPL and only support |
| * getting partition information in a few cases. |
| */ |
| #ifdef CONFIG_SPL_BUILD |
| # define part_print_ptr(x) NULL |
| # if defined(CONFIG_SPL_FS_EXT4) || defined(CONFIG_SPL_FS_FAT) || \ |
| defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION) |
| # define part_get_info_ptr(x) x |
| # else |
| # define part_get_info_ptr(x) NULL |
| # endif |
| #else |
| #define part_print_ptr(x) x |
| #define part_get_info_ptr(x) x |
| #endif |
| |
| |
| struct part_driver { |
| const char *name; |
| int part_type; |
| const int max_entries; /* maximum number of entries to search */ |
| |
| /** |
| * get_info() - Get information about a partition |
| * |
| * @dev_desc: Block device descriptor |
| * @part: Partition number (1 = first) |
| * @info: Returns partition information |
| */ |
| int (*get_info)(struct blk_desc *dev_desc, int part, |
| struct disk_partition *info); |
| |
| /** |
| * print() - Print partition information |
| * |
| * @dev_desc: Block device descriptor |
| */ |
| void (*print)(struct blk_desc *dev_desc); |
| |
| /** |
| * test() - Test if a device contains this partition type |
| * |
| * @dev_desc: Block device descriptor |
| * @return 0 if the block device appears to contain this partition |
| * type, -ve if not |
| */ |
| int (*test)(struct blk_desc *dev_desc); |
| }; |
| |
| /* Declare a new U-Boot partition 'driver' */ |
| #define U_BOOT_PART_TYPE(__name) \ |
| ll_entry_declare(struct part_driver, __name, part_driver) |
| |
| #include <part_efi.h> |
| |
| #if CONFIG_IS_ENABLED(EFI_PARTITION) |
| /* disk/part_efi.c */ |
| /** |
| * write_gpt_table() - Write the GUID Partition Table to disk |
| * |
| * @param dev_desc - block device descriptor |
| * @param gpt_h - pointer to GPT header representation |
| * @param gpt_e - pointer to GPT partition table entries |
| * |
| * Return: - zero on success, otherwise error |
| */ |
| int write_gpt_table(struct blk_desc *dev_desc, |
| gpt_header *gpt_h, gpt_entry *gpt_e); |
| |
| /** |
| * gpt_fill_pte(): Fill the GPT partition table entry |
| * |
| * @param dev_desc - block device descriptor |
| * @param gpt_h - GPT header representation |
| * @param gpt_e - GPT partition table entries |
| * @param partitions - list of partitions |
| * @param parts - number of partitions |
| * |
| * Return: zero on success |
| */ |
| int gpt_fill_pte(struct blk_desc *dev_desc, |
| gpt_header *gpt_h, gpt_entry *gpt_e, |
| struct disk_partition *partitions, int parts); |
| |
| /** |
| * gpt_fill_header(): Fill the GPT header |
| * |
| * @param dev_desc - block device descriptor |
| * @param gpt_h - GPT header representation |
| * @param str_guid - disk guid string representation |
| * @param parts_count - number of partitions |
| * |
| * Return: - error on str_guid conversion error |
| */ |
| int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h, |
| char *str_guid, int parts_count); |
| |
| /** |
| * gpt_restore(): Restore GPT partition table |
| * |
| * @param dev_desc - block device descriptor |
| * @param str_disk_guid - disk GUID |
| * @param partitions - list of partitions |
| * @param parts - number of partitions |
| * |
| * Return: zero on success |
| */ |
| int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid, |
| struct disk_partition *partitions, const int parts_count); |
| |
| /** |
| * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid |
| * |
| * @param dev_desc - block device descriptor |
| * @param buf - buffer which contains the MBR and Primary GPT info |
| * |
| * Return: - '0' on success, otherwise error |
| */ |
| int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf); |
| |
| /** |
| * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT |
| * |
| * @param dev_desc - block device descriptor |
| * @param buf - buffer which contains the MBR and Primary GPT info |
| * |
| * Return: - '0' on success, otherwise error |
| */ |
| int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf); |
| |
| /** |
| * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header |
| * and partition table entries (PTE) |
| * |
| * As a side effect if sets gpt_head and gpt_pte so they point to GPT data. |
| * |
| * @param dev_desc - block device descriptor |
| * @param gpt_head - pointer to GPT header data read from medium |
| * @param gpt_pte - pointer to GPT partition table enties read from medium |
| * |
| * Return: - '0' on success, otherwise error |
| */ |
| int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head, |
| gpt_entry **gpt_pte); |
| |
| /** |
| * gpt_verify_partitions() - Function to check if partitions' name, start and |
| * size correspond to '$partitions' env variable |
| * |
| * This function checks if on medium stored GPT data is in sync with information |
| * provided in '$partitions' environment variable. Specificially, name, start |
| * and size of the partition is checked. |
| * |
| * @param dev_desc - block device descriptor |
| * @param partitions - partition data read from '$partitions' env variable |
| * @param parts - number of partitions read from '$partitions' env variable |
| * @param gpt_head - pointer to GPT header data read from medium |
| * @param gpt_pte - pointer to GPT partition table enties read from medium |
| * |
| * Return: - '0' on success, otherwise error |
| */ |
| int gpt_verify_partitions(struct blk_desc *dev_desc, |
| struct disk_partition *partitions, int parts, |
| gpt_header *gpt_head, gpt_entry **gpt_pte); |
| |
| |
| /** |
| * get_disk_guid() - Function to read the GUID string from a device's GPT |
| * |
| * This function reads the GUID string from a block device whose descriptor |
| * is provided. |
| * |
| * @param dev_desc - block device descriptor |
| * @param guid - pre-allocated string in which to return the GUID |
| * |
| * Return: - '0' on success, otherwise error |
| */ |
| int get_disk_guid(struct blk_desc *dev_desc, char *guid); |
| |
| #endif |
| |
| #if CONFIG_IS_ENABLED(DOS_PARTITION) |
| /** |
| * is_valid_dos_buf() - Ensure that a DOS MBR image is valid |
| * |
| * @param buf - buffer which contains the MBR |
| * |
| * Return: - '0' on success, otherwise error |
| */ |
| int is_valid_dos_buf(void *buf); |
| |
| /** |
| * write_mbr_sector() - write DOS MBR |
| * |
| * @param dev_desc - block device descriptor |
| * @param buf - buffer which contains the MBR |
| * |
| * Return: - '0' on success, otherwise error |
| */ |
| int write_mbr_sector(struct blk_desc *dev_desc, void *buf); |
| |
| int write_mbr_partitions(struct blk_desc *dev, |
| struct disk_partition *p, int count, unsigned int disksig); |
| int layout_mbr_partitions(struct disk_partition *p, int count, |
| lbaint_t total_sectors); |
| |
| #endif |
| |
| #if CONFIG_IS_ENABLED(PARTITIONS) |
| /** |
| * part_driver_get_count() - get partition driver count |
| * |
| * Return: - number of partition drivers |
| */ |
| static inline int part_driver_get_count(void) |
| { |
| return ll_entry_count(struct part_driver, part_driver); |
| } |
| |
| /** |
| * part_driver_get_first() - get first partition driver |
| * |
| * Return: - pointer to first partition driver on success, otherwise NULL |
| */ |
| static inline struct part_driver *part_driver_get_first(void) |
| { |
| return ll_entry_start(struct part_driver, part_driver); |
| } |
| |
| #else |
| static inline int part_driver_get_count(void) |
| { return 0; } |
| |
| static inline struct part_driver *part_driver_get_first(void) |
| { return NULL; } |
| #endif /* CONFIG_PARTITIONS */ |
| |
| #endif /* _PART_H */ |