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u-boot/include/part.h
Stephen Warren 873cc1d777 mmc: store hwpart in the block device 
This will allow us to have multiple block device structs each referring
to the same eMMC device, yet different HW partitions.

For now, there is still a single block device per eMMC device. As before,
this block device always accesses whichever HW partition was most recently
selected. Clients wishing to make use of multiple block devices referring
to different HW partitions can simply take a copy of this block device
once it points at the correct HW partition, and use each one as they wish.
This feature will be used by the next patch.

In the future, perhaps get_device() could be enhanced to return a
dynamically allocated block device struct, to avoid the client needing to
copy it in order to maintain multiple block devices. However, this would
require all users to be updated to free those block device structs at some
point, which is rather a large change.

Most callers of mmc_switch_part() wish to permanently switch the default
MMC block device's HW partition. Enhance mmc_switch_part() so that it does
this. This removes the need for callers to do this. However,
common/env_mmc.c needs to save and restore the current HW partition. Make
it do this more explicitly.

Replace use of mmc_switch_part() with mmc_select_hwpart() in order to
remove duplicate code that skips the call if that HW partition is already
selected.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-01-13 21:05:19 -05:00

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/*
* (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 <ide.h>
#include <common.h>
typedef struct block_dev_desc block_dev_desc_t;
struct block_dev_desc {
int if_type; /* type of the interface */
int dev; /* device number */
unsigned char part_type; /* partition type */
unsigned char target; /* target SCSI ID */
unsigned char lun; /* target LUN */
unsigned char hwpart; /* HW partition, e.g. for eMMC */
unsigned char type; /* device type */
unsigned char removable; /* removable device */
#ifdef CONFIG_LBA48
unsigned char lba48; /* device can use 48bit addr (ATA/ATAPI v7) */
#endif
lbaint_t lba; /* number of blocks */
unsigned long blksz; /* block size */
int log2blksz; /* for convenience: log2(blksz) */
char vendor [40+1]; /* IDE model, SCSI Vendor */
char product[20+1]; /* IDE Serial no, SCSI product */
char revision[8+1]; /* firmware revision */
unsigned long (*block_read)(block_dev_desc_t *block_dev,
lbaint_t start,
lbaint_t blkcnt,
void *buffer);
unsigned long (*block_write)(block_dev_desc_t *block_dev,
lbaint_t start,
lbaint_t blkcnt,
const void *buffer);
unsigned long (*block_erase)(block_dev_desc_t *block_dev,
lbaint_t start,
lbaint_t blkcnt);
void *priv; /* driver private struct pointer */
};
#define BLOCK_CNT(size, block_dev_desc) (PAD_COUNT(size, block_dev_desc->blksz))
#define PAD_TO_BLOCKSIZE(size, block_dev_desc) \
(PAD_SIZE(size, block_dev_desc->blksz))
#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))
/* Interface types: */
#define IF_TYPE_UNKNOWN 0
#define IF_TYPE_IDE 1
#define IF_TYPE_SCSI 2
#define IF_TYPE_ATAPI 3
#define IF_TYPE_USB 4
#define IF_TYPE_DOC 5
#define IF_TYPE_MMC 6
#define IF_TYPE_SD 7
#define IF_TYPE_SATA 8
#define IF_TYPE_HOST 9
#define IF_TYPE_MAX 10 /* Max number of IF_TYPE_* supported */
/* 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
block_dev_desc_t *get_dev(const char *ifname, int dev);
block_dev_desc_t* ide_get_dev(int dev);
block_dev_desc_t* sata_get_dev(int dev);
block_dev_desc_t* scsi_get_dev(int dev);
block_dev_desc_t* usb_stor_get_dev(int dev);
block_dev_desc_t* mmc_get_dev(int dev);
int mmc_select_hwpart(int dev_num, int hwpart);
block_dev_desc_t* systemace_get_dev(int dev);
block_dev_desc_t* mg_disk_get_dev(int dev);
block_dev_desc_t *host_get_dev(int dev);
int host_get_dev_err(int dev, block_dev_desc_t **blk_devp);
/* disk/part.c */
int get_partition_info (block_dev_desc_t * dev_desc, int part, disk_partition_t *info);
void print_part (block_dev_desc_t *dev_desc);
void init_part (block_dev_desc_t *dev_desc);
void dev_print(block_dev_desc_t *dev_desc);
int get_device(const char *ifname, const char *dev_str,
block_dev_desc_t **dev_desc);
int get_device_and_partition(const char *ifname, const char *dev_part_str,
block_dev_desc_t **dev_desc,
disk_partition_t *info, int allow_whole_dev);
#else
static inline block_dev_desc_t *get_dev(const char *ifname, int dev)
{ return NULL; }
static inline block_dev_desc_t* ide_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* sata_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* scsi_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* usb_stor_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* mmc_get_dev(int dev) { return NULL; }
static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; }
static inline block_dev_desc_t* systemace_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* mg_disk_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t *host_get_dev(int dev) { return NULL; }
static inline int get_partition_info (block_dev_desc_t * dev_desc, int part,
disk_partition_t *info) { return -1; }
static inline void print_part (block_dev_desc_t *dev_desc) {}
static inline void init_part (block_dev_desc_t *dev_desc) {}
static inline void dev_print(block_dev_desc_t *dev_desc) {}
static inline int get_device(const char *ifname, const char *dev_str,
block_dev_desc_t **dev_desc)
{ return -1; }
static inline int get_device_and_partition(const char *ifname,
const char *dev_part_str,
block_dev_desc_t **dev_desc,
disk_partition_t *info,
int allow_whole_dev)
{ *dev_desc = NULL; return -1; }
#endif
#ifdef CONFIG_MAC_PARTITION
/* disk/part_mac.c */
int get_partition_info_mac (block_dev_desc_t * dev_desc, int part, disk_partition_t *info);
void print_part_mac (block_dev_desc_t *dev_desc);
int test_part_mac (block_dev_desc_t *dev_desc);
#endif
#ifdef CONFIG_DOS_PARTITION
/* disk/part_dos.c */
int get_partition_info_dos (block_dev_desc_t * dev_desc, int part, disk_partition_t *info);
void print_part_dos (block_dev_desc_t *dev_desc);
int test_part_dos (block_dev_desc_t *dev_desc);
#endif
#ifdef CONFIG_ISO_PARTITION
/* disk/part_iso.c */
int get_partition_info_iso (block_dev_desc_t * dev_desc, int part, disk_partition_t *info);
void print_part_iso (block_dev_desc_t *dev_desc);
int test_part_iso (block_dev_desc_t *dev_desc);
#endif
#ifdef CONFIG_AMIGA_PARTITION
/* disk/part_amiga.c */
int get_partition_info_amiga (block_dev_desc_t * dev_desc, int part, disk_partition_t *info);
void print_part_amiga (block_dev_desc_t *dev_desc);
int test_part_amiga (block_dev_desc_t *dev_desc);
#endif
#ifdef CONFIG_EFI_PARTITION
#include <part_efi.h>
/* disk/part_efi.c */
int get_partition_info_efi (block_dev_desc_t * dev_desc, int part, disk_partition_t *info);
/**
* get_partition_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 get_partition_info_efi_by_name(block_dev_desc_t *dev_desc,
const char *name, disk_partition_t *info);
void print_part_efi (block_dev_desc_t *dev_desc);
int test_part_efi (block_dev_desc_t *dev_desc);
/**
* 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(block_dev_desc_t *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(block_dev_desc_t *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(block_dev_desc_t *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(block_dev_desc_t *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(block_dev_desc_t *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(block_dev_desc_t *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(block_dev_desc_t *dev_desc,
disk_partition_t *partitions, int parts,
gpt_header *gpt_head, gpt_entry **gpt_pte);
#endif
#endif /* _PART_H */
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