1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * (C) Copyright 2000-2004
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
12 #include <linux/list.h>
16 int (*select_hwpart)(int dev_num, int hwpart);
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))
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
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
38 * Type string for U-Boot bootable partitions
40 #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */
41 #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */
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 */
50 #define PART_NAME_LEN 32
51 #define PART_TYPE_LEN 32
52 #define MAX_SEARCH_PARTITIONS 64
54 #define PART_BOOTABLE ((int)BIT(0))
55 #define PART_EFI_SYSTEM_PARTITION ((int)BIT(1))
57 struct disk_partition {
58 lbaint_t start; /* # of first block in partition */
59 lbaint_t size; /* number of blocks in partition */
60 ulong blksz; /* block size in bytes */
61 uchar name[PART_NAME_LEN]; /* partition name */
62 uchar type[PART_TYPE_LEN]; /* string type description */
64 * The bootable is a bitmask with the following fields:
66 * PART_BOOTABLE the MBR bootable flag is set
67 * PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition
70 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
71 char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */
73 #ifdef CONFIG_PARTITION_TYPE_GUID
74 char type_guid[UUID_STR_LEN + 1]; /* type GUID as string, if exists */
76 #ifdef CONFIG_DOS_PARTITION
77 uchar sys_ind; /* partition type */
83 struct disk_partition gpt_part_info;
84 struct list_head list;
87 /* Misc _get_dev functions */
88 #ifdef CONFIG_PARTITIONS
90 * blk_get_dev() - get a pointer to a block device given its type and number
92 * Each interface allocates its own devices and typically struct blk_desc is
93 * contained with the interface's data structure. There is no global
94 * numbering for block devices, so the interface name must be provided.
96 * @ifname: Interface name (e.g. "ide", "scsi")
97 * @dev: Device number (0 for first device on that interface, 1 for
99 * @return pointer to the block device, or NULL if not available, or an
102 struct blk_desc *blk_get_dev(const char *ifname, int dev);
104 struct blk_desc *mg_disk_get_dev(int dev);
105 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
108 int part_get_info(struct blk_desc *dev_desc, int part,
109 struct disk_partition *info);
111 * part_get_info_whole_disk() - get partition info for the special case of
112 * a partition occupying the entire disk.
114 int part_get_info_whole_disk(struct blk_desc *dev_desc,
115 struct disk_partition *info);
117 void part_print(struct blk_desc *dev_desc);
118 void part_init(struct blk_desc *dev_desc);
119 void dev_print(struct blk_desc *dev_desc);
122 * blk_get_device_by_str() - Get a block device given its interface/hw partition
124 * Each interface allocates its own devices and typically struct blk_desc is
125 * contained with the interface's data structure. There is no global
126 * numbering for block devices, so the interface name must be provided.
128 * The hardware parition is not related to the normal software partitioning
129 * of a device - each hardware partition is effectively a separately
130 * accessible block device. When a hardware parition is selected on MMC the
131 * other hardware partitions become inaccessible. The same block device is
132 * used to access all hardware partitions, but its capacity may change when a
133 * different hardware partition is selected.
135 * When a hardware partition number is given, the block device switches to
136 * that hardware partition.
138 * @ifname: Interface name (e.g. "ide", "scsi")
139 * @dev_str: Device and optional hw partition. This can either be a string
140 * containing the device number (e.g. "2") or the device number
141 * and hardware partition number (e.g. "2.4") for devices that
142 * support it (currently only MMC).
143 * @dev_desc: Returns a pointer to the block device on success
144 * @return block device number (local to the interface), or -1 on error
146 int blk_get_device_by_str(const char *ifname, const char *dev_str,
147 struct blk_desc **dev_desc);
150 * blk_get_device_part_str() - Get a block device and partition
152 * This calls blk_get_device_by_str() to look up a device. It also looks up
153 * a partition and returns information about it.
155 * @dev_part_str is in the format:
156 * <dev>.<hw_part>:<part> where <dev> is the device number,
157 * <hw_part> is the optional hardware partition number and
158 * <part> is the partition number
160 * If ifname is "hostfs" then this function returns the sandbox host block
163 * If ifname is ubi, then this function returns 0, with @info set to a
164 * special UBI device.
166 * If @dev_part_str is NULL or empty or "-", then this function looks up
167 * the "bootdevice" environment variable and uses that string instead.
169 * If the partition string is empty then the first partition is used. If the
170 * partition string is "auto" then the first bootable partition is used.
172 * @ifname: Interface name (e.g. "ide", "scsi")
173 * @dev_part_str: Device and partition string
174 * @dev_desc: Returns a pointer to the block device on success
175 * @info: Returns partition information
176 * @allow_whole_dev: true to allow the user to select partition 0
177 * (which means the whole device), false to require a valid
178 * partition number >= 1
179 * @return partition number, or -1 on error
182 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
183 struct blk_desc **dev_desc,
184 struct disk_partition *info, int allow_whole_dev);
187 * part_get_info_by_name_type() - Search for a partition by name
188 * for only specified partition type
190 * @param dev_desc - block device descriptor
191 * @param gpt_name - the specified table entry name
192 * @param info - returns the disk partition info
193 * @param part_type - only search in partitions of this type
195 * @return - the partition number on match (starting on 1), -1 on no match,
198 int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
199 struct disk_partition *info, int part_type);
202 * part_get_info_by_name() - Search for a partition by name
203 * among all available registered partitions
205 * @param dev_desc - block device descriptor
206 * @param gpt_name - the specified table entry name
207 * @param info - returns the disk partition info
209 * @return - the partition number on match (starting on 1), -1 on no match,
212 int part_get_info_by_name(struct blk_desc *dev_desc,
213 const char *name, struct disk_partition *info);
216 * Get partition info from dev number + part name, or dev number + part number.
218 * Parse a device number and partition description (either name or number)
219 * in the form of device number plus partition name separated by a "#"
220 * (like "device_num#partition_name") or a device number plus a partition number
221 * separated by a ":". For example both "0#misc" and "0:1" can be valid
222 * partition descriptions for a given interface. If the partition is found, sets
223 * dev_desc and part_info accordingly with the information of the partition.
225 * @param[in] dev_iface Device interface
226 * @param[in] dev_part_str Input partition description, like "0#misc" or "0:1"
227 * @param[out] dev_desc Place to store the device description pointer
228 * @param[out] part_info Place to store the partition information
229 * @return 0 on success, or a negative on error
231 int part_get_info_by_dev_and_name_or_num(const char *dev_iface,
232 const char *dev_part_str,
233 struct blk_desc **dev_desc,
234 struct disk_partition *part_info);
237 * part_set_generic_name() - create generic partition like hda1 or sdb2
239 * Helper function for partition tables, which don't hold partition names
240 * (DOS, ISO). Generates partition name out of the device type and partition
243 * @dev_desc: pointer to the block device
244 * @part_num: partition number for which the name is generated
245 * @name: buffer where the name is written
247 void part_set_generic_name(const struct blk_desc *dev_desc,
248 int part_num, char *name);
250 extern const struct block_drvr block_drvr[];
252 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
254 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
256 static inline int part_get_info(struct blk_desc *dev_desc, int part,
257 struct disk_partition *info) { return -1; }
258 static inline int part_get_info_whole_disk(struct blk_desc *dev_desc,
259 struct disk_partition *info)
261 static inline void part_print(struct blk_desc *dev_desc) {}
262 static inline void part_init(struct blk_desc *dev_desc) {}
263 static inline void dev_print(struct blk_desc *dev_desc) {}
264 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
265 struct blk_desc **dev_desc)
267 static inline int blk_get_device_part_str(const char *ifname,
268 const char *dev_part_str,
269 struct blk_desc **dev_desc,
270 struct disk_partition *info,
272 { *dev_desc = NULL; return -1; }
276 * We don't support printing partition information in SPL and only support
277 * getting partition information in a few cases.
279 #ifdef CONFIG_SPL_BUILD
280 # define part_print_ptr(x) NULL
281 # if defined(CONFIG_SPL_FS_EXT4) || defined(CONFIG_SPL_FS_FAT) || \
282 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
283 # define part_get_info_ptr(x) x
285 # define part_get_info_ptr(x) NULL
288 #define part_print_ptr(x) x
289 #define part_get_info_ptr(x) x
296 const int max_entries; /* maximum number of entries to search */
299 * get_info() - Get information about a partition
301 * @dev_desc: Block device descriptor
302 * @part: Partition number (1 = first)
303 * @info: Returns partition information
305 int (*get_info)(struct blk_desc *dev_desc, int part,
306 struct disk_partition *info);
309 * print() - Print partition information
311 * @dev_desc: Block device descriptor
313 void (*print)(struct blk_desc *dev_desc);
316 * test() - Test if a device contains this partition type
318 * @dev_desc: Block device descriptor
319 * @return 0 if the block device appears to contain this partition
322 int (*test)(struct blk_desc *dev_desc);
325 /* Declare a new U-Boot partition 'driver' */
326 #define U_BOOT_PART_TYPE(__name) \
327 ll_entry_declare(struct part_driver, __name, part_driver)
329 #include <part_efi.h>
331 #if CONFIG_IS_ENABLED(EFI_PARTITION)
332 /* disk/part_efi.c */
334 * write_gpt_table() - Write the GUID Partition Table to disk
336 * @param dev_desc - block device descriptor
337 * @param gpt_h - pointer to GPT header representation
338 * @param gpt_e - pointer to GPT partition table entries
340 * @return - zero on success, otherwise error
342 int write_gpt_table(struct blk_desc *dev_desc,
343 gpt_header *gpt_h, gpt_entry *gpt_e);
346 * gpt_fill_pte(): Fill the GPT partition table entry
348 * @param dev_desc - block device descriptor
349 * @param gpt_h - GPT header representation
350 * @param gpt_e - GPT partition table entries
351 * @param partitions - list of partitions
352 * @param parts - number of partitions
354 * @return zero on success
356 int gpt_fill_pte(struct blk_desc *dev_desc,
357 gpt_header *gpt_h, gpt_entry *gpt_e,
358 struct disk_partition *partitions, int parts);
361 * gpt_fill_header(): Fill the GPT header
363 * @param dev_desc - block device descriptor
364 * @param gpt_h - GPT header representation
365 * @param str_guid - disk guid string representation
366 * @param parts_count - number of partitions
368 * @return - error on str_guid conversion error
370 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
371 char *str_guid, int parts_count);
374 * gpt_restore(): Restore GPT partition table
376 * @param dev_desc - block device descriptor
377 * @param str_disk_guid - disk GUID
378 * @param partitions - list of partitions
379 * @param parts - number of partitions
381 * @return zero on success
383 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
384 struct disk_partition *partitions, const int parts_count);
387 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
389 * @param dev_desc - block device descriptor
390 * @param buf - buffer which contains the MBR and Primary GPT info
392 * @return - '0' on success, otherwise error
394 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
397 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
399 * @param dev_desc - block device descriptor
400 * @param buf - buffer which contains the MBR and Primary GPT info
402 * @return - '0' on success, otherwise error
404 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
407 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
408 * and partition table entries (PTE)
410 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
412 * @param dev_desc - block device descriptor
413 * @param gpt_head - pointer to GPT header data read from medium
414 * @param gpt_pte - pointer to GPT partition table enties read from medium
416 * @return - '0' on success, otherwise error
418 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
419 gpt_entry **gpt_pte);
422 * gpt_verify_partitions() - Function to check if partitions' name, start and
423 * size correspond to '$partitions' env variable
425 * This function checks if on medium stored GPT data is in sync with information
426 * provided in '$partitions' environment variable. Specificially, name, start
427 * and size of the partition is checked.
429 * @param dev_desc - block device descriptor
430 * @param partitions - partition data read from '$partitions' env variable
431 * @param parts - number of partitions read from '$partitions' env variable
432 * @param gpt_head - pointer to GPT header data read from medium
433 * @param gpt_pte - pointer to GPT partition table enties read from medium
435 * @return - '0' on success, otherwise error
437 int gpt_verify_partitions(struct blk_desc *dev_desc,
438 struct disk_partition *partitions, int parts,
439 gpt_header *gpt_head, gpt_entry **gpt_pte);
443 * get_disk_guid() - Function to read the GUID string from a device's GPT
445 * This function reads the GUID string from a block device whose descriptor
448 * @param dev_desc - block device descriptor
449 * @param guid - pre-allocated string in which to return the GUID
451 * @return - '0' on success, otherwise error
453 int get_disk_guid(struct blk_desc *dev_desc, char *guid);
457 #if CONFIG_IS_ENABLED(DOS_PARTITION)
459 * is_valid_dos_buf() - Ensure that a DOS MBR image is valid
461 * @param buf - buffer which contains the MBR
463 * @return - '0' on success, otherwise error
465 int is_valid_dos_buf(void *buf);
468 * write_mbr_partition() - write DOS MBR
470 * @param dev_desc - block device descriptor
471 * @param buf - buffer which contains the MBR
473 * @return - '0' on success, otherwise error
475 int write_mbr_partition(struct blk_desc *dev_desc, void *buf);