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 #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
  14                  ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
  15                  ((x & 0xffff0000) ? 16 : 0))
  16 #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))
  17
  18 /* Part types */
  19 #define PART_TYPE_UNKNOWN       0x00
  20 #define PART_TYPE_MAC           0x01
  21 #define PART_TYPE_DOS           0x02
  22 #define PART_TYPE_ISO           0x03
  23 #define PART_TYPE_AMIGA         0x04
  24 #define PART_TYPE_EFI           0x05
  25
  26 /*
  27  * Type string for U-Boot bootable partitions
  28  */
  29 #define BOOT_PART_TYPE  "U-Boot"        /* primary boot partition type  */
  30 #define BOOT_PART_COMP  "PPCBoot"       /* PPCBoot compatibility type   */
  31
  32 /* device types */
  33 #define DEV_TYPE_UNKNOWN        0xff    /* not connected */
  34 #define DEV_TYPE_HARDDISK       0x00    /* harddisk */
  35 #define DEV_TYPE_TAPE           0x01    /* Tape */
  36 #define DEV_TYPE_CDROM          0x05    /* CD-ROM */
  37 #define DEV_TYPE_OPDISK         0x07    /* optical disk */
  38
  39 typedef struct disk_partition {
  40         lbaint_t        start;  /* # of first block in partition        */
  41         lbaint_t        size;   /* number of blocks in partition        */
  42         ulong   blksz;          /* block size in bytes                  */
  43         uchar   name[32];       /* partition name                       */
  44         uchar   type[32];       /* string type description              */
  45         int     bootable;       /* Active/Bootable flag is set          */
  46 #ifdef CONFIG_PARTITION_UUIDS
  47         char    uuid[37];       /* filesystem UUID as string, if exists */
  48 #endif
  49 #ifdef CONFIG_PARTITION_TYPE_GUID
  50         char    type_guid[37];  /* type GUID as string, if exists       */
  51 #endif
  52 } disk_partition_t;
  53
  54 /* Misc _get_dev functions */
  55 #ifdef CONFIG_PARTITIONS
  56 /**
  57  * blk_get_dev() - get a pointer to a block device given its type and number
  58  *
  59  * Each interface allocates its own devices and typically struct blk_desc is
  60  * contained with the interface's data structure. There is no global
  61  * numbering for block devices, so the interface name must be provided.
  62  *
  63  * @ifname:     Interface name (e.g. "ide", "scsi")
  64  * @dev:        Device number (0 for first device on that interface, 1 for
  65  *              second, etc.
  66  * @return pointer to the block device, or NULL if not available, or an
  67  *         error occurred.
  68  */
  69 struct blk_desc *blk_get_dev(const char *ifname, int dev);
  70 struct blk_desc *ide_get_dev(int dev);
  71 struct blk_desc *sata_get_dev(int dev);
  72 struct blk_desc *scsi_get_dev(int dev);
  73 struct blk_desc *usb_stor_get_dev(int dev);
  74 struct blk_desc *mmc_get_dev(int dev);
  75
  76 /**
  77  * mmc_select_hwpart() - Select the MMC hardware partiion on an MMC device
  78  *
  79  * MMC devices can support partitioning at the hardware level. This is quite
  80  * separate from the normal idea of software-based partitions. MMC hardware
  81  * partitions must be explicitly selected. Once selected only the region of
  82  * the device covered by that partition is accessible.
  83  *
  84  * The MMC standard provides for two boot partitions (numbered 1 and 2),
  85  * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
  86  *
  87  * @dev_num:    Block device number (struct blk_desc->dev value)
  88  * @hwpart:     Hardware partition number to select. 0 means the raw device,
  89  *              1 is the first partition, 2 is the second, etc.
  90  * @return 0 if OK, other value for an error
  91  */
  92 int mmc_select_hwpart(int dev_num, int hwpart);
  93 struct blk_desc *systemace_get_dev(int dev);
  94 struct blk_desc *mg_disk_get_dev(int dev);
  95 struct blk_desc *host_get_dev(int dev);
  96 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
  97
  98 /* disk/part.c */
  99 int get_partition_info(struct blk_desc *dev_desc, int part,
 100                        disk_partition_t *info);
 101 void print_part(struct blk_desc *dev_desc);
 102 void init_part(struct blk_desc *dev_desc);
 103 void dev_print(struct blk_desc *dev_desc);
 104
 105 /**
 106  * blk_get_device_by_str() - Get a block device given its interface/hw partition
 107  *
 108  * Each interface allocates its own devices and typically struct blk_desc is
 109  * contained with the interface's data structure. There is no global
 110  * numbering for block devices, so the interface name must be provided.
 111  *
 112  * The hardware parition is not related to the normal software partitioning
 113  * of a device - each hardware partition is effectively a separately
 114  * accessible block device. When a hardware parition is selected on MMC the
 115  * other hardware partitions become inaccessible. The same block device is
 116  * used to access all hardware partitions, but its capacity may change when a
 117  * different hardware partition is selected.
 118  *
 119  * When a hardware partition number is given, the block device switches to
 120  * that hardware partition.
 121  *
 122  * @ifname:     Interface name (e.g. "ide", "scsi")
 123  * @dev_str:    Device and optional hw partition. This can either be a string
 124  *              containing the device number (e.g. "2") or the device number
 125  *              and hardware partition number (e.g. "2.4") for devices that
 126  *              support it (currently only MMC).
 127  * @dev_desc:   Returns a pointer to the block device on success
 128  * @return block device number (local to the interface), or -1 on error
 129  */
 130 int blk_get_device_by_str(const char *ifname, const char *dev_str,
 131                           struct blk_desc **dev_desc);
 132
 133 /**
 134  * blk_get_device_part_str() - Get a block device and partition
 135  *
 136  * This calls blk_get_device_by_str() to look up a device. It also looks up
 137  * a partition and returns information about it.
 138  *
 139  * @dev_part_str is in the format:
 140  *      <dev>.<hw_part>:<part> where <dev> is the device number,
 141  *      <hw_part> is the optional hardware partition number and
 142  *      <part> is the partition number
 143  *
 144  * If ifname is "hostfs" then this function returns the sandbox host block
 145  * device.
 146  *
 147  * If ifname is ubi, then this function returns 0, with @info set to a
 148  * special UBI device.
 149  *
 150  * If @dev_part_str is NULL or empty or "-", then this function looks up
 151  * the "bootdevice" environment variable and uses that string instead.
 152  *
 153  * If the partition string is empty then the first partition is used. If the
 154  * partition string is "auto" then the first bootable partition is used.
 155  *
 156  * @ifname:     Interface name (e.g. "ide", "scsi")
 157  * @dev_part_str:       Device and partition string
 158  * @dev_desc:   Returns a pointer to the block device on success
 159  * @info:       Returns partition information
 160  * @allow_whole_dev:    true to allow the user to select partition 0
 161  *              (which means the whole device), false to require a valid
 162  *              partition number >= 1
 163  * @return partition number, or -1 on error
 164  *
 165  */
 166 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 167                             struct blk_desc **dev_desc,
 168                             disk_partition_t *info, int allow_whole_dev);
 169 #else
 170 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
 171 { return NULL; }
 172 static inline struct blk_desc *ide_get_dev(int dev) { return NULL; }
 173 static inline struct blk_desc *sata_get_dev(int dev) { return NULL; }
 174 static inline struct blk_desc *scsi_get_dev(int dev) { return NULL; }
 175 static inline struct blk_desc *usb_stor_get_dev(int dev) { return NULL; }
 176 static inline struct blk_desc *mmc_get_dev(int dev) { return NULL; }
 177 static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; }
 178 static inline struct blk_desc *systemace_get_dev(int dev) { return NULL; }
 179 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
 180 static inline struct blk_desc *host_get_dev(int dev) { return NULL; }
 181
 182 static inline int get_partition_info(struct blk_desc *dev_desc, int part,
 183                                      disk_partition_t *info) { return -1; }
 184 static inline void print_part(struct blk_desc *dev_desc) {}
 185 static inline void init_part(struct blk_desc *dev_desc) {}
 186 static inline void dev_print(struct blk_desc *dev_desc) {}
 187 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
 188                                         struct blk_desc **dev_desc)
 189 { return -1; }
 190 static inline int blk_get_device_part_str(const char *ifname,
 191                                            const char *dev_part_str,
 192                                            struct blk_desc **dev_desc,
 193                                            disk_partition_t *info,
 194                                            int allow_whole_dev)
 195 { *dev_desc = NULL; return -1; }
 196 #endif
 197
 198 /*
 199  * We don't support printing partition information in SPL and only support
 200  * getting partition information in a few cases.
 201  */
 202 #ifdef CONFIG_SPL_BUILD
 203 # define part_print_ptr(x)      NULL
 204 # if defined(CONFIG_SPL_EXT_SUPPORT) || \
 205         defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
 206 #  define part_get_info_ptr(x)  x
 207 # else
 208 #  define part_get_info_ptr(x)  NULL
 209 # endif
 210 #else
 211 #define part_print_ptr(x)       x
 212 #define part_get_info_ptr(x)    x
 213 #endif
 214
 215
 216 struct part_driver {
 217         const char *name;
 218         int part_type;
 219
 220         /**
 221          * get_info() - Get information about a partition
 222          *
 223          * @dev_desc:   Block device descriptor
 224          * @part:       Partition number (1 = first)
 225          * @info:       Returns partition information
 226          */
 227         int (*get_info)(struct blk_desc *dev_desc, int part,
 228                         disk_partition_t *info);
 229
 230         /**
 231          * print() - Print partition information
 232          *
 233          * @dev_desc:   Block device descriptor
 234          */
 235         void (*print)(struct blk_desc *dev_desc);
 236
 237         /**
 238          * test() - Test if a device contains this partition type
 239          *
 240          * @dev_desc:   Block device descriptor
 241          * @return 0 if the block device appears to contain this partition
 242          *         type, -ve if not
 243          */
 244         int (*test)(struct blk_desc *dev_desc);
 245 };
 246
 247 /* Declare a new U-Boot partition 'driver' */
 248 #define U_BOOT_PART_TYPE(__name)                                        \
 249         ll_entry_declare(struct part_driver, __name, part_driver)
 250
 251 #ifdef CONFIG_EFI_PARTITION
 252 #include <part_efi.h>
 253 /* disk/part_efi.c */
 254 /**
 255  * get_partition_info_efi_by_name() - Find the specified GPT partition table entry
 256  *
 257  * @param dev_desc - block device descriptor
 258  * @param gpt_name - the specified table entry name
 259  * @param info - returns the disk partition info
 260  *
 261  * @return - '0' on match, '-1' on no match, otherwise error
 262  */
 263 int get_partition_info_efi_by_name(struct blk_desc *dev_desc,
 264         const char *name, disk_partition_t *info);
 265
 266 /**
 267  * write_gpt_table() - Write the GUID Partition Table to disk
 268  *
 269  * @param dev_desc - block device descriptor
 270  * @param gpt_h - pointer to GPT header representation
 271  * @param gpt_e - pointer to GPT partition table entries
 272  *
 273  * @return - zero on success, otherwise error
 274  */
 275 int write_gpt_table(struct blk_desc *dev_desc,
 276                   gpt_header *gpt_h, gpt_entry *gpt_e);
 277
 278 /**
 279  * gpt_fill_pte(): Fill the GPT partition table entry
 280  *
 281  * @param gpt_h - GPT header representation
 282  * @param gpt_e - GPT partition table entries
 283  * @param partitions - list of partitions
 284  * @param parts - number of partitions
 285  *
 286  * @return zero on success
 287  */
 288 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
 289                 disk_partition_t *partitions, int parts);
 290
 291 /**
 292  * gpt_fill_header(): Fill the GPT header
 293  *
 294  * @param dev_desc - block device descriptor
 295  * @param gpt_h - GPT header representation
 296  * @param str_guid - disk guid string representation
 297  * @param parts_count - number of partitions
 298  *
 299  * @return - error on str_guid conversion error
 300  */
 301 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
 302                 char *str_guid, int parts_count);
 303
 304 /**
 305  * gpt_restore(): Restore GPT partition table
 306  *
 307  * @param dev_desc - block device descriptor
 308  * @param str_disk_guid - disk GUID
 309  * @param partitions - list of partitions
 310  * @param parts - number of partitions
 311  *
 312  * @return zero on success
 313  */
 314 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
 315                 disk_partition_t *partitions, const int parts_count);
 316
 317 /**
 318  * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
 319  *
 320  * @param dev_desc - block device descriptor
 321  * @param buf - buffer which contains the MBR and Primary GPT info
 322  *
 323  * @return - '0' on success, otherwise error
 324  */
 325 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
 326
 327 /**
 328  * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
 329  *
 330  * @param dev_desc - block device descriptor
 331  * @param buf - buffer which contains the MBR and Primary GPT info
 332  *
 333  * @return - '0' on success, otherwise error
 334  */
 335 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
 336
 337 /**
 338  * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
 339  *                        and partition table entries (PTE)
 340  *
 341  * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
 342  *
 343  * @param dev_desc - block device descriptor
 344  * @param gpt_head - pointer to GPT header data read from medium
 345  * @param gpt_pte - pointer to GPT partition table enties read from medium
 346  *
 347  * @return - '0' on success, otherwise error
 348  */
 349 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
 350                        gpt_entry **gpt_pte);
 351
 352 /**
 353  * gpt_verify_partitions() - Function to check if partitions' name, start and
 354  *                           size correspond to '$partitions' env variable
 355  *
 356  * This function checks if on medium stored GPT data is in sync with information
 357  * provided in '$partitions' environment variable. Specificially, name, start
 358  * and size of the partition is checked.
 359  *
 360  * @param dev_desc - block device descriptor
 361  * @param partitions - partition data read from '$partitions' env variable
 362  * @param parts - number of partitions read from '$partitions' env variable
 363  * @param gpt_head - pointer to GPT header data read from medium
 364  * @param gpt_pte - pointer to GPT partition table enties read from medium
 365  *
 366  * @return - '0' on success, otherwise error
 367  */
 368 int gpt_verify_partitions(struct blk_desc *dev_desc,
 369                           disk_partition_t *partitions, int parts,
 370                           gpt_header *gpt_head, gpt_entry **gpt_pte);
 371 #endif
 372
 373 #endif /* _PART_H */