u-boot/include/part.h
Simon Glass 33fb211dd2 dm: mmc: Add support for driver-model block devices
Add support for enabling CONFIG_BLK with MMC. This involves changing a
few functions to use struct udevice and adding a MMC block device driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-17 09:54:43 -06:00

347 lines
12 KiB
C

/*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _PART_H
#define _PART_H
#include <blk.h>
#include <ide.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
/*
* 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 */
typedef 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[32]; /* partition name */
uchar type[32]; /* string type description */
int bootable; /* Active/Bootable flag is set */
#ifdef CONFIG_PARTITION_UUIDS
char uuid[37]; /* filesystem UUID as string, if exists */
#endif
#ifdef CONFIG_PARTITION_TYPE_GUID
char type_guid[37]; /* type GUID as string, if exists */
#endif
} disk_partition_t;
/* Misc _get_dev functions */
#ifdef CONFIG_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);
int host_get_dev_err(int dev, struct blk_desc **blk_devp);
/* disk/part.c */
int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *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,
disk_partition_t *info, int allow_whole_dev);
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,
disk_partition_t *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,
disk_partition_t *info,
int allow_whole_dev)
{ *dev_desc = NULL; return -1; }
#endif
/*
* 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_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
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;
/**
* 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,
disk_partition_t *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)
#ifdef CONFIG_EFI_PARTITION
#include <part_efi.h>
/* disk/part_efi.c */
/**
* part_get_info_efi_by_name() - Find the specified GPT partition table entry
*
* @param dev_desc - block device descriptor
* @param gpt_name - the specified table entry name
* @param info - returns the disk partition info
*
* @return - '0' on match, '-1' on no match, otherwise error
*/
int part_get_info_efi_by_name(struct blk_desc *dev_desc,
const char *name, disk_partition_t *info);
/**
* 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 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(gpt_header *gpt_h, gpt_entry *gpt_e,
disk_partition_t *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,
disk_partition_t *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,
disk_partition_t *partitions, int parts,
gpt_header *gpt_head, gpt_entry **gpt_pte);
#endif
#endif /* _PART_H */