include/part.h

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #ifndef _PART_H
   8 #define _PART_H
   9
  10 #include <blk.h>
  11 #include <ide.h>
  12
  13 struct block_drvr {
  14         char *name;
  15         int (*select_hwpart)(int dev_num, int hwpart);
  16 };
  17
  18 #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
  19                  ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
  20                  ((x & 0xffff0000) ? 16 : 0))
  21 #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))
  22
  23 /* Part types */
  24 #define PART_TYPE_UNKNOWN       0x00
  25 #define PART_TYPE_MAC           0x01
  26 #define PART_TYPE_DOS           0x02
  27 #define PART_TYPE_ISO           0x03
  28 #define PART_TYPE_AMIGA         0x04
  29 #define PART_TYPE_EFI           0x05
  30
  31 /*
  32  * Type string for U-Boot bootable partitions
  33  */
  34 #define BOOT_PART_TYPE  "U-Boot"        /* primary boot partition type  */
  35 #define BOOT_PART_COMP  "PPCBoot"       /* PPCBoot compatibility type   */
  36
  37 /* device types */
  38 #define DEV_TYPE_UNKNOWN        0xff    /* not connected */
  39 #define DEV_TYPE_HARDDISK       0x00    /* harddisk */
  40 #define DEV_TYPE_TAPE           0x01    /* Tape */
  41 #define DEV_TYPE_CDROM          0x05    /* CD-ROM */
  42 #define DEV_TYPE_OPDISK         0x07    /* optical disk */
  43
  44 typedef struct disk_partition {
  45         lbaint_t        start;  /* # of first block in partition        */
  46         lbaint_t        size;   /* number of blocks in partition        */
  47         ulong   blksz;          /* block size in bytes                  */
  48         uchar   name[32];       /* partition name                       */
  49         uchar   type[32];       /* string type description              */
  50         int     bootable;       /* Active/Bootable flag is set          */
  51 #ifdef CONFIG_PARTITION_UUIDS
  52         char    uuid[37];       /* filesystem UUID as string, if exists */
  53 #endif
  54 #ifdef CONFIG_PARTITION_TYPE_GUID
  55         char    type_guid[37];  /* type GUID as string, if exists       */
  56 #endif
  57 } disk_partition_t;
  58
  59 /* Misc _get_dev functions */
  60 #ifdef CONFIG_PARTITIONS
  61 /**
  62  * blk_get_dev() - get a pointer to a block device given its type and number
  63  *
  64  * Each interface allocates its own devices and typically struct blk_desc is
  65  * contained with the interface's data structure. There is no global
  66  * numbering for block devices, so the interface name must be provided.
  67  *
  68  * @ifname:     Interface name (e.g. "ide", "scsi")
  69  * @dev:        Device number (0 for first device on that interface, 1 for
  70  *              second, etc.
  71  * @return pointer to the block device, or NULL if not available, or an
  72  *         error occurred.
  73  */
  74 struct blk_desc *blk_get_dev(const char *ifname, int dev);
  75
  76 struct blk_desc *mg_disk_get_dev(int dev);
  77 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
  78
  79 /* disk/part.c */
  80 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info);
  81 void part_print(struct blk_desc *dev_desc);
  82 void part_init(struct blk_desc *dev_desc);
  83 void dev_print(struct blk_desc *dev_desc);
  84
  85 /**
  86  * blk_get_device_by_str() - Get a block device given its interface/hw partition
  87  *
  88  * Each interface allocates its own devices and typically struct blk_desc is
  89  * contained with the interface's data structure. There is no global
  90  * numbering for block devices, so the interface name must be provided.
  91  *
  92  * The hardware parition is not related to the normal software partitioning
  93  * of a device - each hardware partition is effectively a separately
  94  * accessible block device. When a hardware parition is selected on MMC the
  95  * other hardware partitions become inaccessible. The same block device is
  96  * used to access all hardware partitions, but its capacity may change when a
  97  * different hardware partition is selected.
  98  *
  99  * When a hardware partition number is given, the block device switches to
 100  * that hardware partition.
 101  *
 102  * @ifname:     Interface name (e.g. "ide", "scsi")
 103  * @dev_str:    Device and optional hw partition. This can either be a string
 104  *              containing the device number (e.g. "2") or the device number
 105  *              and hardware partition number (e.g. "2.4") for devices that
 106  *              support it (currently only MMC).
 107  * @dev_desc:   Returns a pointer to the block device on success
 108  * @return block device number (local to the interface), or -1 on error
 109  */
 110 int blk_get_device_by_str(const char *ifname, const char *dev_str,
 111                           struct blk_desc **dev_desc);
 112
 113 /**
 114  * blk_get_device_part_str() - Get a block device and partition
 115  *
 116  * This calls blk_get_device_by_str() to look up a device. It also looks up
 117  * a partition and returns information about it.
 118  *
 119  * @dev_part_str is in the format:
 120  *      <dev>.<hw_part>:<part> where <dev> is the device number,
 121  *      <hw_part> is the optional hardware partition number and
 122  *      <part> is the partition number
 123  *
 124  * If ifname is "hostfs" then this function returns the sandbox host block
 125  * device.
 126  *
 127  * If ifname is ubi, then this function returns 0, with @info set to a
 128  * special UBI device.
 129  *
 130  * If @dev_part_str is NULL or empty or "-", then this function looks up
 131  * the "bootdevice" environment variable and uses that string instead.
 132  *
 133  * If the partition string is empty then the first partition is used. If the
 134  * partition string is "auto" then the first bootable partition is used.
 135  *
 136  * @ifname:     Interface name (e.g. "ide", "scsi")
 137  * @dev_part_str:       Device and partition string
 138  * @dev_desc:   Returns a pointer to the block device on success
 139  * @info:       Returns partition information
 140  * @allow_whole_dev:    true to allow the user to select partition 0
 141  *              (which means the whole device), false to require a valid
 142  *              partition number >= 1
 143  * @return partition number, or -1 on error
 144  *
 145  */
 146 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 147                             struct blk_desc **dev_desc,
 148                             disk_partition_t *info, int allow_whole_dev);
 149 extern const struct block_drvr block_drvr[];
 150 #else
 151 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
 152 { return NULL; }
 153 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
 154
 155 static inline int part_get_info(struct blk_desc *dev_desc, int part,
 156                                 disk_partition_t *info) { return -1; }
 157 static inline void part_print(struct blk_desc *dev_desc) {}
 158 static inline void part_init(struct blk_desc *dev_desc) {}
 159 static inline void dev_print(struct blk_desc *dev_desc) {}
 160 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
 161                                         struct blk_desc **dev_desc)
 162 { return -1; }
 163 static inline int blk_get_device_part_str(const char *ifname,
 164                                            const char *dev_part_str,
 165                                            struct blk_desc **dev_desc,
 166                                            disk_partition_t *info,
 167                                            int allow_whole_dev)
 168 { *dev_desc = NULL; return -1; }
 169 #endif
 170
 171 /*
 172  * We don't support printing partition information in SPL and only support
 173  * getting partition information in a few cases.
 174  */
 175 #ifdef CONFIG_SPL_BUILD
 176 # define part_print_ptr(x)      NULL
 177 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
 178         defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
 179 #  define part_get_info_ptr(x)  x
 180 # else
 181 #  define part_get_info_ptr(x)  NULL
 182 # endif
 183 #else
 184 #define part_print_ptr(x)       x
 185 #define part_get_info_ptr(x)    x
 186 #endif
 187
 188
 189 struct part_driver {
 190         const char *name;
 191         int part_type;
 192
 193         /**
 194          * get_info() - Get information about a partition
 195          *
 196          * @dev_desc:   Block device descriptor
 197          * @part:       Partition number (1 = first)
 198          * @info:       Returns partition information
 199          */
 200         int (*get_info)(struct blk_desc *dev_desc, int part,
 201                         disk_partition_t *info);
 202
 203         /**
 204          * print() - Print partition information
 205          *
 206          * @dev_desc:   Block device descriptor
 207          */
 208         void (*print)(struct blk_desc *dev_desc);
 209
 210         /**
 211          * test() - Test if a device contains this partition type
 212          *
 213          * @dev_desc:   Block device descriptor
 214          * @return 0 if the block device appears to contain this partition
 215          *         type, -ve if not
 216          */
 217         int (*test)(struct blk_desc *dev_desc);
 218 };
 219
 220 /* Declare a new U-Boot partition 'driver' */
 221 #define U_BOOT_PART_TYPE(__name)                                        \
 222         ll_entry_declare(struct part_driver, __name, part_driver)
 223
 224 #ifdef CONFIG_EFI_PARTITION
 225 #include <part_efi.h>
 226 /* disk/part_efi.c */
 227 /**
 228  * part_get_info_efi_by_name() - Find the specified GPT partition table entry
 229  *
 230  * @param dev_desc - block device descriptor
 231  * @param gpt_name - the specified table entry name
 232  * @param info - returns the disk partition info
 233  *
 234  * @return - '0' on match, '-1' on no match, otherwise error
 235  */
 236 int part_get_info_efi_by_name(struct blk_desc *dev_desc,
 237                               const char *name, disk_partition_t *info);
 238
 239 /**
 240  * write_gpt_table() - Write the GUID Partition Table to disk
 241  *
 242  * @param dev_desc - block device descriptor
 243  * @param gpt_h - pointer to GPT header representation
 244  * @param gpt_e - pointer to GPT partition table entries
 245  *
 246  * @return - zero on success, otherwise error
 247  */
 248 int write_gpt_table(struct blk_desc *dev_desc,
 249                   gpt_header *gpt_h, gpt_entry *gpt_e);
 250
 251 /**
 252  * gpt_fill_pte(): Fill the GPT partition table entry
 253  *
 254  * @param gpt_h - GPT header representation
 255  * @param gpt_e - GPT partition table entries
 256  * @param partitions - list of partitions
 257  * @param parts - number of partitions
 258  *
 259  * @return zero on success
 260  */
 261 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
 262                 disk_partition_t *partitions, int parts);
 263
 264 /**
 265  * gpt_fill_header(): Fill the GPT header
 266  *
 267  * @param dev_desc - block device descriptor
 268  * @param gpt_h - GPT header representation
 269  * @param str_guid - disk guid string representation
 270  * @param parts_count - number of partitions
 271  *
 272  * @return - error on str_guid conversion error
 273  */
 274 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
 275                 char *str_guid, int parts_count);
 276
 277 /**
 278  * gpt_restore(): Restore GPT partition table
 279  *
 280  * @param dev_desc - block device descriptor
 281  * @param str_disk_guid - disk GUID
 282  * @param partitions - list of partitions
 283  * @param parts - number of partitions
 284  *
 285  * @return zero on success
 286  */
 287 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
 288                 disk_partition_t *partitions, const int parts_count);
 289
 290 /**
 291  * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
 292  *
 293  * @param dev_desc - block device descriptor
 294  * @param buf - buffer which contains the MBR and Primary GPT info
 295  *
 296  * @return - '0' on success, otherwise error
 297  */
 298 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
 299
 300 /**
 301  * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
 302  *
 303  * @param dev_desc - block device descriptor
 304  * @param buf - buffer which contains the MBR and Primary GPT info
 305  *
 306  * @return - '0' on success, otherwise error
 307  */
 308 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
 309
 310 /**
 311  * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
 312  *                        and partition table entries (PTE)
 313  *
 314  * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
 315  *
 316  * @param dev_desc - block device descriptor
 317  * @param gpt_head - pointer to GPT header data read from medium
 318  * @param gpt_pte - pointer to GPT partition table enties read from medium
 319  *
 320  * @return - '0' on success, otherwise error
 321  */
 322 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
 323                        gpt_entry **gpt_pte);
 324
 325 /**
 326  * gpt_verify_partitions() - Function to check if partitions' name, start and
 327  *                           size correspond to '$partitions' env variable
 328  *
 329  * This function checks if on medium stored GPT data is in sync with information
 330  * provided in '$partitions' environment variable. Specificially, name, start
 331  * and size of the partition is checked.
 332  *
 333  * @param dev_desc - block device descriptor
 334  * @param partitions - partition data read from '$partitions' env variable
 335  * @param parts - number of partitions read from '$partitions' env variable
 336  * @param gpt_head - pointer to GPT header data read from medium
 337  * @param gpt_pte - pointer to GPT partition table enties read from medium
 338  *
 339  * @return - '0' on success, otherwise error
 340  */
 341 int gpt_verify_partitions(struct blk_desc *dev_desc,
 342                           disk_partition_t *partitions, int parts,
 343                           gpt_header *gpt_head, gpt_entry **gpt_pte);
 344 #endif
 345
 346 #endif /* _PART_H */