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         struct blk_desc* (*get_dev)(int dev);
  16         int (*select_hwpart)(int dev_num, int hwpart);
  17 };
  18
  19 #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
  20                  ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
  21                  ((x & 0xffff0000) ? 16 : 0))
  22 #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))
  23
  24 /* Part types */
  25 #define PART_TYPE_UNKNOWN       0x00
  26 #define PART_TYPE_MAC           0x01
  27 #define PART_TYPE_DOS           0x02
  28 #define PART_TYPE_ISO           0x03
  29 #define PART_TYPE_AMIGA         0x04
  30 #define PART_TYPE_EFI           0x05
  31
  32 /*
  33  * Type string for U-Boot bootable partitions
  34  */
  35 #define BOOT_PART_TYPE  "U-Boot"        /* primary boot partition type  */
  36 #define BOOT_PART_COMP  "PPCBoot"       /* PPCBoot compatibility type   */
  37
  38 /* device types */
  39 #define DEV_TYPE_UNKNOWN        0xff    /* not connected */
  40 #define DEV_TYPE_HARDDISK       0x00    /* harddisk */
  41 #define DEV_TYPE_TAPE           0x01    /* Tape */
  42 #define DEV_TYPE_CDROM          0x05    /* CD-ROM */
  43 #define DEV_TYPE_OPDISK         0x07    /* optical disk */
  44
  45 typedef struct disk_partition {
  46         lbaint_t        start;  /* # of first block in partition        */
  47         lbaint_t        size;   /* number of blocks in partition        */
  48         ulong   blksz;          /* block size in bytes                  */
  49         uchar   name[32];       /* partition name                       */
  50         uchar   type[32];       /* string type description              */
  51         int     bootable;       /* Active/Bootable flag is set          */
  52 #ifdef CONFIG_PARTITION_UUIDS
  53         char    uuid[37];       /* filesystem UUID as string, if exists */
  54 #endif
  55 #ifdef CONFIG_PARTITION_TYPE_GUID
  56         char    type_guid[37];  /* type GUID as string, if exists       */
  57 #endif
  58 } disk_partition_t;
  59
  60 /* Misc _get_dev functions */
  61 #ifdef CONFIG_PARTITIONS
  62 /**
  63  * blk_get_dev() - get a pointer to a block device given its type and number
  64  *
  65  * Each interface allocates its own devices and typically struct blk_desc is
  66  * contained with the interface's data structure. There is no global
  67  * numbering for block devices, so the interface name must be provided.
  68  *
  69  * @ifname:     Interface name (e.g. "ide", "scsi")
  70  * @dev:        Device number (0 for first device on that interface, 1 for
  71  *              second, etc.
  72  * @return pointer to the block device, or NULL if not available, or an
  73  *         error occurred.
  74  */
  75 struct blk_desc *blk_get_dev(const char *ifname, int dev);
  76
  77 /**
  78  * mmc_select_hwpart() - Select the MMC hardware partiion on an MMC device
  79  *
  80  * MMC devices can support partitioning at the hardware level. This is quite
  81  * separate from the normal idea of software-based partitions. MMC hardware
  82  * partitions must be explicitly selected. Once selected only the region of
  83  * the device covered by that partition is accessible.
  84  *
  85  * The MMC standard provides for two boot partitions (numbered 1 and 2),
  86  * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
  87  *
  88  * @dev_num:    Block device number (struct blk_desc->dev value)
  89  * @hwpart:     Hardware partition number to select. 0 means the raw device,
  90  *              1 is the first partition, 2 is the second, etc.
  91  * @return 0 if OK, other value for an error
  92  */
  93 int mmc_select_hwpart(int dev_num, int hwpart);
  94 struct blk_desc *mg_disk_get_dev(int dev);
  95 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
  96
  97 /* disk/part.c */
  98 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info);
  99 void part_print(struct blk_desc *dev_desc);
 100 void part_init(struct blk_desc *dev_desc);
 101 void dev_print(struct blk_desc *dev_desc);
 102
 103 /**
 104  * blk_get_device_by_str() - Get a block device given its interface/hw partition
 105  *
 106  * Each interface allocates its own devices and typically struct blk_desc is
 107  * contained with the interface's data structure. There is no global
 108  * numbering for block devices, so the interface name must be provided.
 109  *
 110  * The hardware parition is not related to the normal software partitioning
 111  * of a device - each hardware partition is effectively a separately
 112  * accessible block device. When a hardware parition is selected on MMC the
 113  * other hardware partitions become inaccessible. The same block device is
 114  * used to access all hardware partitions, but its capacity may change when a
 115  * different hardware partition is selected.
 116  *
 117  * When a hardware partition number is given, the block device switches to
 118  * that hardware partition.
 119  *
 120  * @ifname:     Interface name (e.g. "ide", "scsi")
 121  * @dev_str:    Device and optional hw partition. This can either be a string
 122  *              containing the device number (e.g. "2") or the device number
 123  *              and hardware partition number (e.g. "2.4") for devices that
 124  *              support it (currently only MMC).
 125  * @dev_desc:   Returns a pointer to the block device on success
 126  * @return block device number (local to the interface), or -1 on error
 127  */
 128 int blk_get_device_by_str(const char *ifname, const char *dev_str,
 129                           struct blk_desc **dev_desc);
 130
 131 /**
 132  * blk_get_device_part_str() - Get a block device and partition
 133  *
 134  * This calls blk_get_device_by_str() to look up a device. It also looks up
 135  * a partition and returns information about it.
 136  *
 137  * @dev_part_str is in the format:
 138  *      <dev>.<hw_part>:<part> where <dev> is the device number,
 139  *      <hw_part> is the optional hardware partition number and
 140  *      <part> is the partition number
 141  *
 142  * If ifname is "hostfs" then this function returns the sandbox host block
 143  * device.
 144  *
 145  * If ifname is ubi, then this function returns 0, with @info set to a
 146  * special UBI device.
 147  *
 148  * If @dev_part_str is NULL or empty or "-", then this function looks up
 149  * the "bootdevice" environment variable and uses that string instead.
 150  *
 151  * If the partition string is empty then the first partition is used. If the
 152  * partition string is "auto" then the first bootable partition is used.
 153  *
 154  * @ifname:     Interface name (e.g. "ide", "scsi")
 155  * @dev_part_str:       Device and partition string
 156  * @dev_desc:   Returns a pointer to the block device on success
 157  * @info:       Returns partition information
 158  * @allow_whole_dev:    true to allow the user to select partition 0
 159  *              (which means the whole device), false to require a valid
 160  *              partition number >= 1
 161  * @return partition number, or -1 on error
 162  *
 163  */
 164 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 165                             struct blk_desc **dev_desc,
 166                             disk_partition_t *info, int allow_whole_dev);
 167 extern const struct block_drvr block_drvr[];
 168 #else
 169 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
 170 { return NULL; }
 171 static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; }
 172 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
 173
 174 static inline int part_get_info(struct blk_desc *dev_desc, int part,
 175                                 disk_partition_t *info) { return -1; }
 176 static inline void part_print(struct blk_desc *dev_desc) {}
 177 static inline void part_init(struct blk_desc *dev_desc) {}
 178 static inline void dev_print(struct blk_desc *dev_desc) {}
 179 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
 180                                         struct blk_desc **dev_desc)
 181 { return -1; }
 182 static inline int blk_get_device_part_str(const char *ifname,
 183                                            const char *dev_part_str,
 184                                            struct blk_desc **dev_desc,
 185                                            disk_partition_t *info,
 186                                            int allow_whole_dev)
 187 { *dev_desc = NULL; return -1; }
 188 #endif
 189
 190 /*
 191  * We don't support printing partition information in SPL and only support
 192  * getting partition information in a few cases.
 193  */
 194 #ifdef CONFIG_SPL_BUILD
 195 # define part_print_ptr(x)      NULL
 196 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
 197         defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
 198 #  define part_get_info_ptr(x)  x
 199 # else
 200 #  define part_get_info_ptr(x)  NULL
 201 # endif
 202 #else
 203 #define part_print_ptr(x)       x
 204 #define part_get_info_ptr(x)    x
 205 #endif
 206
 207
 208 struct part_driver {
 209         const char *name;
 210         int part_type;
 211
 212         /**
 213          * get_info() - Get information about a partition
 214          *
 215          * @dev_desc:   Block device descriptor
 216          * @part:       Partition number (1 = first)
 217          * @info:       Returns partition information
 218          */
 219         int (*get_info)(struct blk_desc *dev_desc, int part,
 220                         disk_partition_t *info);
 221
 222         /**
 223          * print() - Print partition information
 224          *
 225          * @dev_desc:   Block device descriptor
 226          */
 227         void (*print)(struct blk_desc *dev_desc);
 228
 229         /**
 230          * test() - Test if a device contains this partition type
 231          *
 232          * @dev_desc:   Block device descriptor
 233          * @return 0 if the block device appears to contain this partition
 234          *         type, -ve if not
 235          */
 236         int (*test)(struct blk_desc *dev_desc);
 237 };
 238
 239 /* Declare a new U-Boot partition 'driver' */
 240 #define U_BOOT_PART_TYPE(__name)                                        \
 241         ll_entry_declare(struct part_driver, __name, part_driver)
 242
 243 #ifdef CONFIG_EFI_PARTITION
 244 #include <part_efi.h>
 245 /* disk/part_efi.c */
 246 /**
 247  * part_get_info_efi_by_name() - Find the specified GPT partition table entry
 248  *
 249  * @param dev_desc - block device descriptor
 250  * @param gpt_name - the specified table entry name
 251  * @param info - returns the disk partition info
 252  *
 253  * @return - '0' on match, '-1' on no match, otherwise error
 254  */
 255 int part_get_info_efi_by_name(struct blk_desc *dev_desc,
 256                               const char *name, disk_partition_t *info);
 257
 258 /**
 259  * write_gpt_table() - Write the GUID Partition Table to disk
 260  *
 261  * @param dev_desc - block device descriptor
 262  * @param gpt_h - pointer to GPT header representation
 263  * @param gpt_e - pointer to GPT partition table entries
 264  *
 265  * @return - zero on success, otherwise error
 266  */
 267 int write_gpt_table(struct blk_desc *dev_desc,
 268                   gpt_header *gpt_h, gpt_entry *gpt_e);
 269
 270 /**
 271  * gpt_fill_pte(): Fill the GPT partition table entry
 272  *
 273  * @param gpt_h - GPT header representation
 274  * @param gpt_e - GPT partition table entries
 275  * @param partitions - list of partitions
 276  * @param parts - number of partitions
 277  *
 278  * @return zero on success
 279  */
 280 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
 281                 disk_partition_t *partitions, int parts);
 282
 283 /**
 284  * gpt_fill_header(): Fill the GPT header
 285  *
 286  * @param dev_desc - block device descriptor
 287  * @param gpt_h - GPT header representation
 288  * @param str_guid - disk guid string representation
 289  * @param parts_count - number of partitions
 290  *
 291  * @return - error on str_guid conversion error
 292  */
 293 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
 294                 char *str_guid, int parts_count);
 295
 296 /**
 297  * gpt_restore(): Restore GPT partition table
 298  *
 299  * @param dev_desc - block device descriptor
 300  * @param str_disk_guid - disk GUID
 301  * @param partitions - list of partitions
 302  * @param parts - number of partitions
 303  *
 304  * @return zero on success
 305  */
 306 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
 307                 disk_partition_t *partitions, const int parts_count);
 308
 309 /**
 310  * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
 311  *
 312  * @param dev_desc - block device descriptor
 313  * @param buf - buffer which contains the MBR and Primary GPT info
 314  *
 315  * @return - '0' on success, otherwise error
 316  */
 317 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
 318
 319 /**
 320  * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
 321  *
 322  * @param dev_desc - block device descriptor
 323  * @param buf - buffer which contains the MBR and Primary GPT info
 324  *
 325  * @return - '0' on success, otherwise error
 326  */
 327 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
 328
 329 /**
 330  * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
 331  *                        and partition table entries (PTE)
 332  *
 333  * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
 334  *
 335  * @param dev_desc - block device descriptor
 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_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
 342                        gpt_entry **gpt_pte);
 343
 344 /**
 345  * gpt_verify_partitions() - Function to check if partitions' name, start and
 346  *                           size correspond to '$partitions' env variable
 347  *
 348  * This function checks if on medium stored GPT data is in sync with information
 349  * provided in '$partitions' environment variable. Specificially, name, start
 350  * and size of the partition is checked.
 351  *
 352  * @param dev_desc - block device descriptor
 353  * @param partitions - partition data read from '$partitions' env variable
 354  * @param parts - number of partitions read from '$partitions' env variable
 355  * @param gpt_head - pointer to GPT header data read from medium
 356  * @param gpt_pte - pointer to GPT partition table enties read from medium
 357  *
 358  * @return - '0' on success, otherwise error
 359  */
 360 int gpt_verify_partitions(struct blk_desc *dev_desc,
 361                           disk_partition_t *partitions, int parts,
 362                           gpt_header *gpt_head, gpt_entry **gpt_pte);
 363 #endif
 364
 365 #endif /* _PART_H */