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 */ 347