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 typedef 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 disk_partition_t 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, disk_partition_t *info);
110 * part_get_info_whole_disk() - get partition info for the special case of
111 * a partition occupying the entire disk.
113 int part_get_info_whole_disk(struct blk_desc *dev_desc, disk_partition_t *info);
115 void part_print(struct blk_desc *dev_desc);
116 void part_init(struct blk_desc *dev_desc);
117 void dev_print(struct blk_desc *dev_desc);
120 * blk_get_device_by_str() - Get a block device given its interface/hw partition
122 * Each interface allocates its own devices and typically struct blk_desc is
123 * contained with the interface's data structure. There is no global
124 * numbering for block devices, so the interface name must be provided.
126 * The hardware parition is not related to the normal software partitioning
127 * of a device - each hardware partition is effectively a separately
128 * accessible block device. When a hardware parition is selected on MMC the
129 * other hardware partitions become inaccessible. The same block device is
130 * used to access all hardware partitions, but its capacity may change when a
131 * different hardware partition is selected.
133 * When a hardware partition number is given, the block device switches to
134 * that hardware partition.
136 * @ifname: Interface name (e.g. "ide", "scsi")
137 * @dev_str: Device and optional hw partition. This can either be a string
138 * containing the device number (e.g. "2") or the device number
139 * and hardware partition number (e.g. "2.4") for devices that
140 * support it (currently only MMC).
141 * @dev_desc: Returns a pointer to the block device on success
142 * @return block device number (local to the interface), or -1 on error
144 int blk_get_device_by_str(const char *ifname, const char *dev_str,
145 struct blk_desc **dev_desc);
148 * blk_get_device_part_str() - Get a block device and partition
150 * This calls blk_get_device_by_str() to look up a device. It also looks up
151 * a partition and returns information about it.
153 * @dev_part_str is in the format:
154 * <dev>.<hw_part>:<part> where <dev> is the device number,
155 * <hw_part> is the optional hardware partition number and
156 * <part> is the partition number
158 * If ifname is "hostfs" then this function returns the sandbox host block
161 * If ifname is ubi, then this function returns 0, with @info set to a
162 * special UBI device.
164 * If @dev_part_str is NULL or empty or "-", then this function looks up
165 * the "bootdevice" environment variable and uses that string instead.
167 * If the partition string is empty then the first partition is used. If the
168 * partition string is "auto" then the first bootable partition is used.
170 * @ifname: Interface name (e.g. "ide", "scsi")
171 * @dev_part_str: Device and partition string
172 * @dev_desc: Returns a pointer to the block device on success
173 * @info: Returns partition information
174 * @allow_whole_dev: true to allow the user to select partition 0
175 * (which means the whole device), false to require a valid
176 * partition number >= 1
177 * @return partition number, or -1 on error
180 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
181 struct blk_desc **dev_desc,
182 disk_partition_t *info, int allow_whole_dev);
185 * part_get_info_by_name_type() - Search for a partition by name
186 * for only specified partition type
188 * @param dev_desc - block device descriptor
189 * @param gpt_name - the specified table entry name
190 * @param info - returns the disk partition info
191 * @param part_type - only search in partitions of this type
193 * @return - the partition number on match (starting on 1), -1 on no match,
196 int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
197 disk_partition_t *info, int part_type);
200 * part_get_info_by_name() - Search for a partition by name
201 * among all available registered partitions
203 * @param dev_desc - block device descriptor
204 * @param gpt_name - the specified table entry name
205 * @param info - returns the disk partition info
207 * @return - the partition number on match (starting on 1), -1 on no match,
210 int part_get_info_by_name(struct blk_desc *dev_desc,
211 const char *name, disk_partition_t *info);
214 * Get partition info from dev number + part name, or dev number + part number.
216 * Parse a device number and partition description (either name or number)
217 * in the form of device number plus partition name separated by a "#"
218 * (like "device_num#partition_name") or a device number plus a partition number
219 * separated by a ":". For example both "0#misc" and "0:1" can be valid
220 * partition descriptions for a given interface. If the partition is found, sets
221 * dev_desc and part_info accordingly with the information of the partition.
223 * @param[in] dev_iface Device interface
224 * @param[in] dev_part_str Input partition description, like "0#misc" or "0:1"
225 * @param[out] dev_desc Place to store the device description pointer
226 * @param[out] part_info Place to store the partition information
227 * @return 0 on success, or a negative on error
229 int part_get_info_by_dev_and_name_or_num(const char *dev_iface,
230 const char *dev_part_str,
231 struct blk_desc **dev_desc,
232 disk_partition_t *part_info);
235 * part_set_generic_name() - create generic partition like hda1 or sdb2
237 * Helper function for partition tables, which don't hold partition names
238 * (DOS, ISO). Generates partition name out of the device type and partition
241 * @dev_desc: pointer to the block device
242 * @part_num: partition number for which the name is generated
243 * @name: buffer where the name is written
245 void part_set_generic_name(const struct blk_desc *dev_desc,
246 int part_num, char *name);
248 extern const struct block_drvr block_drvr[];
250 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
252 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
254 static inline int part_get_info(struct blk_desc *dev_desc, int part,
255 disk_partition_t *info) { return -1; }
256 static inline int part_get_info_whole_disk(struct blk_desc *dev_desc,
257 disk_partition_t *info)
259 static inline void part_print(struct blk_desc *dev_desc) {}
260 static inline void part_init(struct blk_desc *dev_desc) {}
261 static inline void dev_print(struct blk_desc *dev_desc) {}
262 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
263 struct blk_desc **dev_desc)
265 static inline int blk_get_device_part_str(const char *ifname,
266 const char *dev_part_str,
267 struct blk_desc **dev_desc,
268 disk_partition_t *info,
270 { *dev_desc = NULL; return -1; }
274 * We don't support printing partition information in SPL and only support
275 * getting partition information in a few cases.
277 #ifdef CONFIG_SPL_BUILD
278 # define part_print_ptr(x) NULL
279 # if defined(CONFIG_SPL_FS_EXT4) || defined(CONFIG_SPL_FS_FAT) || \
280 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
281 # define part_get_info_ptr(x) x
283 # define part_get_info_ptr(x) NULL
286 #define part_print_ptr(x) x
287 #define part_get_info_ptr(x) x
294 const int max_entries; /* maximum number of entries to search */
297 * get_info() - Get information about a partition
299 * @dev_desc: Block device descriptor
300 * @part: Partition number (1 = first)
301 * @info: Returns partition information
303 int (*get_info)(struct blk_desc *dev_desc, int part,
304 disk_partition_t *info);
307 * print() - Print partition information
309 * @dev_desc: Block device descriptor
311 void (*print)(struct blk_desc *dev_desc);
314 * test() - Test if a device contains this partition type
316 * @dev_desc: Block device descriptor
317 * @return 0 if the block device appears to contain this partition
320 int (*test)(struct blk_desc *dev_desc);
323 /* Declare a new U-Boot partition 'driver' */
324 #define U_BOOT_PART_TYPE(__name) \
325 ll_entry_declare(struct part_driver, __name, part_driver)
327 #include <part_efi.h>
329 #if CONFIG_IS_ENABLED(EFI_PARTITION)
330 /* disk/part_efi.c */
332 * write_gpt_table() - Write the GUID Partition Table to disk
334 * @param dev_desc - block device descriptor
335 * @param gpt_h - pointer to GPT header representation
336 * @param gpt_e - pointer to GPT partition table entries
338 * @return - zero on success, otherwise error
340 int write_gpt_table(struct blk_desc *dev_desc,
341 gpt_header *gpt_h, gpt_entry *gpt_e);
344 * gpt_fill_pte(): Fill the GPT partition table entry
346 * @param dev_desc - block device descriptor
347 * @param gpt_h - GPT header representation
348 * @param gpt_e - GPT partition table entries
349 * @param partitions - list of partitions
350 * @param parts - number of partitions
352 * @return zero on success
354 int gpt_fill_pte(struct blk_desc *dev_desc,
355 gpt_header *gpt_h, gpt_entry *gpt_e,
356 disk_partition_t *partitions, int parts);
359 * gpt_fill_header(): Fill the GPT header
361 * @param dev_desc - block device descriptor
362 * @param gpt_h - GPT header representation
363 * @param str_guid - disk guid string representation
364 * @param parts_count - number of partitions
366 * @return - error on str_guid conversion error
368 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
369 char *str_guid, int parts_count);
372 * gpt_restore(): Restore GPT partition table
374 * @param dev_desc - block device descriptor
375 * @param str_disk_guid - disk GUID
376 * @param partitions - list of partitions
377 * @param parts - number of partitions
379 * @return zero on success
381 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
382 disk_partition_t *partitions, const int parts_count);
385 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
387 * @param dev_desc - block device descriptor
388 * @param buf - buffer which contains the MBR and Primary GPT info
390 * @return - '0' on success, otherwise error
392 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
395 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
397 * @param dev_desc - block device descriptor
398 * @param buf - buffer which contains the MBR and Primary GPT info
400 * @return - '0' on success, otherwise error
402 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
405 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
406 * and partition table entries (PTE)
408 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
410 * @param dev_desc - block device descriptor
411 * @param gpt_head - pointer to GPT header data read from medium
412 * @param gpt_pte - pointer to GPT partition table enties read from medium
414 * @return - '0' on success, otherwise error
416 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
417 gpt_entry **gpt_pte);
420 * gpt_verify_partitions() - Function to check if partitions' name, start and
421 * size correspond to '$partitions' env variable
423 * This function checks if on medium stored GPT data is in sync with information
424 * provided in '$partitions' environment variable. Specificially, name, start
425 * and size of the partition is checked.
427 * @param dev_desc - block device descriptor
428 * @param partitions - partition data read from '$partitions' env variable
429 * @param parts - number of partitions read from '$partitions' env variable
430 * @param gpt_head - pointer to GPT header data read from medium
431 * @param gpt_pte - pointer to GPT partition table enties read from medium
433 * @return - '0' on success, otherwise error
435 int gpt_verify_partitions(struct blk_desc *dev_desc,
436 disk_partition_t *partitions, int parts,
437 gpt_header *gpt_head, gpt_entry **gpt_pte);
441 * get_disk_guid() - Function to read the GUID string from a device's GPT
443 * This function reads the GUID string from a block device whose descriptor
446 * @param dev_desc - block device descriptor
447 * @param guid - pre-allocated string in which to return the GUID
449 * @return - '0' on success, otherwise error
451 int get_disk_guid(struct blk_desc *dev_desc, char *guid);
455 #if CONFIG_IS_ENABLED(DOS_PARTITION)
457 * is_valid_dos_buf() - Ensure that a DOS MBR image is valid
459 * @param buf - buffer which contains the MBR
461 * @return - '0' on success, otherwise error
463 int is_valid_dos_buf(void *buf);
466 * write_mbr_partition() - write DOS MBR
468 * @param dev_desc - block device descriptor
469 * @param buf - buffer which contains the MBR
471 * @return - '0' on success, otherwise error
473 int write_mbr_partition(struct blk_desc *dev_desc, void *buf);