1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2000-2004 4 * Wolfgang Denk, DENX Software Engineering, wd (at) denx.de. 5 */ 6 #ifndef _PART_H 7 #define _PART_H 8 9 #include <blk.h> 10 #include <ide.h> 11 #include <uuid.h> 12 #include <linux/list.h> 13 14 struct block_drvr { 15 char *name; 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 /* maximum number of partition entries supported by search */ 33 #define DOS_ENTRY_NUMBERS 8 34 #define ISO_ENTRY_NUMBERS 64 35 #define MAC_ENTRY_NUMBERS 64 36 #define AMIGA_ENTRY_NUMBERS 8 37 /* 38 * Type string for U-Boot bootable partitions 39 */ 40 #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */ 41 #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */ 42 43 /* device types */ 44 #define DEV_TYPE_UNKNOWN 0xff /* not connected */ 45 #define DEV_TYPE_HARDDISK 0x00 /* harddisk */ 46 #define DEV_TYPE_TAPE 0x01 /* Tape */ 47 #define DEV_TYPE_CDROM 0x05 /* CD-ROM */ 48 #define DEV_TYPE_OPDISK 0x07 /* optical disk */ 49 50 #define PART_NAME_LEN 32 51 #define PART_TYPE_LEN 32 52 #define MAX_SEARCH_PARTITIONS 64 53 54 typedef struct disk_partition { 55 lbaint_t start; /* # of first block in partition */ 56 lbaint_t size; /* number of blocks in partition */ 57 ulong blksz; /* block size in bytes */ 58 uchar name[PART_NAME_LEN]; /* partition name */ 59 uchar type[PART_TYPE_LEN]; /* string type description */ 60 int bootable; /* Active/Bootable flag is set */ 61 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 62 char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */ 63 #endif 64 #ifdef CONFIG_PARTITION_TYPE_GUID 65 char type_guid[UUID_STR_LEN + 1]; /* type GUID as string, if exists */ 66 #endif 67 #ifdef CONFIG_DOS_PARTITION 68 uchar sys_ind; /* partition type */ 69 #endif 70 } disk_partition_t; 71 72 struct disk_part { 73 int partnum; 74 disk_partition_t gpt_part_info; 75 struct list_head list; 76 }; 77 78 /* Misc _get_dev functions */ 79 #ifdef CONFIG_PARTITIONS 80 /** 81 * blk_get_dev() - get a pointer to a block device given its type and number 82 * 83 * Each interface allocates its own devices and typically struct blk_desc is 84 * contained with the interface's data structure. There is no global 85 * numbering for block devices, so the interface name must be provided. 86 * 87 * @ifname: Interface name (e.g. "ide", "scsi") 88 * @dev: Device number (0 for first device on that interface, 1 for 89 * second, etc. 90 * @return pointer to the block device, or NULL if not available, or an 91 * error occurred. 92 */ 93 struct blk_desc *blk_get_dev(const char *ifname, int dev); 94 95 struct blk_desc *mg_disk_get_dev(int dev); 96 int host_get_dev_err(int dev, struct blk_desc **blk_devp); 97 98 /* disk/part.c */ 99 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info); 100 /** 101 * part_get_info_whole_disk() - get partition info for the special case of 102 * a partition occupying the entire disk. 103 */ 104 int part_get_info_whole_disk(struct blk_desc *dev_desc, disk_partition_t *info); 105 106 void part_print(struct blk_desc *dev_desc); 107 void part_init(struct blk_desc *dev_desc); 108 void dev_print(struct blk_desc *dev_desc); 109 110 /** 111 * blk_get_device_by_str() - Get a block device given its interface/hw partition 112 * 113 * Each interface allocates its own devices and typically struct blk_desc is 114 * contained with the interface's data structure. There is no global 115 * numbering for block devices, so the interface name must be provided. 116 * 117 * The hardware parition is not related to the normal software partitioning 118 * of a device - each hardware partition is effectively a separately 119 * accessible block device. When a hardware parition is selected on MMC the 120 * other hardware partitions become inaccessible. The same block device is 121 * used to access all hardware partitions, but its capacity may change when a 122 * different hardware partition is selected. 123 * 124 * When a hardware partition number is given, the block device switches to 125 * that hardware partition. 126 * 127 * @ifname: Interface name (e.g. "ide", "scsi") 128 * @dev_str: Device and optional hw partition. This can either be a string 129 * containing the device number (e.g. "2") or the device number 130 * and hardware partition number (e.g. "2.4") for devices that 131 * support it (currently only MMC). 132 * @dev_desc: Returns a pointer to the block device on success 133 * @return block device number (local to the interface), or -1 on error 134 */ 135 int blk_get_device_by_str(const char *ifname, const char *dev_str, 136 struct blk_desc **dev_desc); 137 138 /** 139 * blk_get_device_part_str() - Get a block device and partition 140 * 141 * This calls blk_get_device_by_str() to look up a device. It also looks up 142 * a partition and returns information about it. 143 * 144 * @dev_part_str is in the format: 145 * <dev>.<hw_part>:<part> where <dev> is the device number, 146 * <hw_part> is the optional hardware partition number and 147 * <part> is the partition number 148 * 149 * If ifname is "hostfs" then this function returns the sandbox host block 150 * device. 151 * 152 * If ifname is ubi, then this function returns 0, with @info set to a 153 * special UBI device. 154 * 155 * If @dev_part_str is NULL or empty or "-", then this function looks up 156 * the "bootdevice" environment variable and uses that string instead. 157 * 158 * If the partition string is empty then the first partition is used. If the 159 * partition string is "auto" then the first bootable partition is used. 160 * 161 * @ifname: Interface name (e.g. "ide", "scsi") 162 * @dev_part_str: Device and partition string 163 * @dev_desc: Returns a pointer to the block device on success 164 * @info: Returns partition information 165 * @allow_whole_dev: true to allow the user to select partition 0 166 * (which means the whole device), false to require a valid 167 * partition number >= 1 168 * @return partition number, or -1 on error 169 * 170 */ 171 int blk_get_device_part_str(const char *ifname, const char *dev_part_str, 172 struct blk_desc **dev_desc, 173 disk_partition_t *info, int allow_whole_dev); 174 175 /** 176 * part_get_info_by_name_type() - Search for a partition by name 177 * for only specified partition type 178 * 179 * @param dev_desc - block device descriptor 180 * @param gpt_name - the specified table entry name 181 * @param info - returns the disk partition info 182 * @param part_type - only search in partitions of this type 183 * 184 * @return - the partition number on match (starting on 1), -1 on no match, 185 * otherwise error 186 */ 187 int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name, 188 disk_partition_t *info, int part_type); 189 190 /** 191 * part_get_info_by_name() - Search for a partition by name 192 * among all available registered partitions 193 * 194 * @param dev_desc - block device descriptor 195 * @param gpt_name - the specified table entry name 196 * @param info - returns the disk partition info 197 * 198 * @return - the partition number on match (starting on 1), -1 on no match, 199 * otherwise error 200 */ 201 int part_get_info_by_name(struct blk_desc *dev_desc, 202 const char *name, disk_partition_t *info); 203 204 /** 205 * part_set_generic_name() - create generic partition like hda1 or sdb2 206 * 207 * Helper function for partition tables, which don't hold partition names 208 * (DOS, ISO). Generates partition name out of the device type and partition 209 * number. 210 * 211 * @dev_desc: pointer to the block device 212 * @part_num: partition number for which the name is generated 213 * @name: buffer where the name is written 214 */ 215 void part_set_generic_name(const struct blk_desc *dev_desc, 216 int part_num, char *name); 217 218 extern const struct block_drvr block_drvr[]; 219 #else 220 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev) 221 { return NULL; } 222 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; } 223 224 static inline int part_get_info(struct blk_desc *dev_desc, int part, 225 disk_partition_t *info) { return -1; } 226 static inline int part_get_info_whole_disk(struct blk_desc *dev_desc, 227 disk_partition_t *info) 228 { return -1; } 229 static inline void part_print(struct blk_desc *dev_desc) {} 230 static inline void part_init(struct blk_desc *dev_desc) {} 231 static inline void dev_print(struct blk_desc *dev_desc) {} 232 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str, 233 struct blk_desc **dev_desc) 234 { return -1; } 235 static inline int blk_get_device_part_str(const char *ifname, 236 const char *dev_part_str, 237 struct blk_desc **dev_desc, 238 disk_partition_t *info, 239 int allow_whole_dev) 240 { *dev_desc = NULL; return -1; } 241 #endif 242 243 /* 244 * We don't support printing partition information in SPL and only support 245 * getting partition information in a few cases. 246 */ 247 #ifdef CONFIG_SPL_BUILD 248 # define part_print_ptr(x) NULL 249 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \ 250 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION) 251 # define part_get_info_ptr(x) x 252 # else 253 # define part_get_info_ptr(x) NULL 254 # endif 255 #else 256 #define part_print_ptr(x) x 257 #define part_get_info_ptr(x) x 258 #endif 259 260 261 struct part_driver { 262 const char *name; 263 int part_type; 264 const int max_entries; /* maximum number of entries to search */ 265 266 /** 267 * get_info() - Get information about a partition 268 * 269 * @dev_desc: Block device descriptor 270 * @part: Partition number (1 = first) 271 * @info: Returns partition information 272 */ 273 int (*get_info)(struct blk_desc *dev_desc, int part, 274 disk_partition_t *info); 275 276 /** 277 * print() - Print partition information 278 * 279 * @dev_desc: Block device descriptor 280 */ 281 void (*print)(struct blk_desc *dev_desc); 282 283 /** 284 * test() - Test if a device contains this partition type 285 * 286 * @dev_desc: Block device descriptor 287 * @return 0 if the block device appears to contain this partition 288 * type, -ve if not 289 */ 290 int (*test)(struct blk_desc *dev_desc); 291 }; 292 293 /* Declare a new U-Boot partition 'driver' */ 294 #define U_BOOT_PART_TYPE(__name) \ 295 ll_entry_declare(struct part_driver, __name, part_driver) 296 297 #include <part_efi.h> 298 299 #if CONFIG_IS_ENABLED(EFI_PARTITION) 300 /* disk/part_efi.c */ 301 /** 302 * write_gpt_table() - Write the GUID Partition Table to disk 303 * 304 * @param dev_desc - block device descriptor 305 * @param gpt_h - pointer to GPT header representation 306 * @param gpt_e - pointer to GPT partition table entries 307 * 308 * @return - zero on success, otherwise error 309 */ 310 int write_gpt_table(struct blk_desc *dev_desc, 311 gpt_header *gpt_h, gpt_entry *gpt_e); 312 313 /** 314 * gpt_fill_pte(): Fill the GPT partition table entry 315 * 316 * @param dev_desc - block device descriptor 317 * @param gpt_h - GPT header representation 318 * @param gpt_e - GPT partition table entries 319 * @param partitions - list of partitions 320 * @param parts - number of partitions 321 * 322 * @return zero on success 323 */ 324 int gpt_fill_pte(struct blk_desc *dev_desc, 325 gpt_header *gpt_h, gpt_entry *gpt_e, 326 disk_partition_t *partitions, int parts); 327 328 /** 329 * gpt_fill_header(): Fill the GPT header 330 * 331 * @param dev_desc - block device descriptor 332 * @param gpt_h - GPT header representation 333 * @param str_guid - disk guid string representation 334 * @param parts_count - number of partitions 335 * 336 * @return - error on str_guid conversion error 337 */ 338 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h, 339 char *str_guid, int parts_count); 340 341 /** 342 * gpt_restore(): Restore GPT partition table 343 * 344 * @param dev_desc - block device descriptor 345 * @param str_disk_guid - disk GUID 346 * @param partitions - list of partitions 347 * @param parts - number of partitions 348 * 349 * @return zero on success 350 */ 351 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid, 352 disk_partition_t *partitions, const int parts_count); 353 354 /** 355 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid 356 * 357 * @param dev_desc - block device descriptor 358 * @param buf - buffer which contains the MBR and Primary GPT info 359 * 360 * @return - '0' on success, otherwise error 361 */ 362 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf); 363 364 /** 365 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT 366 * 367 * @param dev_desc - block device descriptor 368 * @param buf - buffer which contains the MBR and Primary GPT info 369 * 370 * @return - '0' on success, otherwise error 371 */ 372 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf); 373 374 /** 375 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header 376 * and partition table entries (PTE) 377 * 378 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data. 379 * 380 * @param dev_desc - block device descriptor 381 * @param gpt_head - pointer to GPT header data read from medium 382 * @param gpt_pte - pointer to GPT partition table enties read from medium 383 * 384 * @return - '0' on success, otherwise error 385 */ 386 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head, 387 gpt_entry **gpt_pte); 388 389 /** 390 * gpt_verify_partitions() - Function to check if partitions' name, start and 391 * size correspond to '$partitions' env variable 392 * 393 * This function checks if on medium stored GPT data is in sync with information 394 * provided in '$partitions' environment variable. Specificially, name, start 395 * and size of the partition is checked. 396 * 397 * @param dev_desc - block device descriptor 398 * @param partitions - partition data read from '$partitions' env variable 399 * @param parts - number of partitions read from '$partitions' env variable 400 * @param gpt_head - pointer to GPT header data read from medium 401 * @param gpt_pte - pointer to GPT partition table enties read from medium 402 * 403 * @return - '0' on success, otherwise error 404 */ 405 int gpt_verify_partitions(struct blk_desc *dev_desc, 406 disk_partition_t *partitions, int parts, 407 gpt_header *gpt_head, gpt_entry **gpt_pte); 408 409 410 /** 411 * get_disk_guid() - Function to read the GUID string from a device's GPT 412 * 413 * This function reads the GUID string from a block device whose descriptor 414 * is provided. 415 * 416 * @param dev_desc - block device descriptor 417 * @param guid - pre-allocated string in which to return the GUID 418 * 419 * @return - '0' on success, otherwise error 420 */ 421 int get_disk_guid(struct blk_desc *dev_desc, char *guid); 422 423 #endif 424 425 #if CONFIG_IS_ENABLED(DOS_PARTITION) 426 /** 427 * is_valid_dos_buf() - Ensure that a DOS MBR image is valid 428 * 429 * @param buf - buffer which contains the MBR 430 * 431 * @return - '0' on success, otherwise error 432 */ 433 int is_valid_dos_buf(void *buf); 434 435 /** 436 * write_mbr_partition() - write DOS MBR 437 * 438 * @param dev_desc - block device descriptor 439 * @param buf - buffer which contains the MBR 440 * 441 * @return - '0' on success, otherwise error 442 */ 443 int write_mbr_partition(struct blk_desc *dev_desc, void *buf); 444 445 #endif 446 447 448 #endif /* _PART_H */ 449
