2 * (C) Copyright 2000-2004
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
15 struct blk_desc* (*get_dev)(int dev);
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
33 * Type string for U-Boot bootable partitions
35 #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */
36 #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */
39 #define DEV_TYPE_UNKNOWN 0xff /* not connected */
40 #define DEV_TYPE_HARDDISK 0x00 /* harddisk */
41 #define DEV_TYPE_TAPE 0x01 /* Tape */
42 #define DEV_TYPE_CDROM 0x05 /* CD-ROM */
43 #define DEV_TYPE_OPDISK 0x07 /* optical disk */
45 typedef struct disk_partition {
46 lbaint_t start; /* # of first block in partition */
47 lbaint_t size; /* number of blocks in partition */
48 ulong blksz; /* block size in bytes */
49 uchar name[32]; /* partition name */
50 uchar type[32]; /* string type description */
51 int bootable; /* Active/Bootable flag is set */
52 #ifdef CONFIG_PARTITION_UUIDS
53 char uuid[37]; /* filesystem UUID as string, if exists */
55 #ifdef CONFIG_PARTITION_TYPE_GUID
56 char type_guid[37]; /* type GUID as string, if exists */
60 /* Misc _get_dev functions */
61 #ifdef CONFIG_PARTITIONS
63 * blk_get_dev() - get a pointer to a block device given its type and number
65 * Each interface allocates its own devices and typically struct blk_desc is
66 * contained with the interface's data structure. There is no global
67 * numbering for block devices, so the interface name must be provided.
69 * @ifname: Interface name (e.g. "ide", "scsi")
70 * @dev: Device number (0 for first device on that interface, 1 for
72 * @return pointer to the block device, or NULL if not available, or an
75 struct blk_desc *blk_get_dev(const char *ifname, int dev);
76 struct blk_desc *sata_get_dev(int dev);
77 struct blk_desc *scsi_get_dev(int dev);
78 struct blk_desc *mmc_get_dev(int dev);
81 * mmc_select_hwpart() - Select the MMC hardware partiion on an MMC device
83 * MMC devices can support partitioning at the hardware level. This is quite
84 * separate from the normal idea of software-based partitions. MMC hardware
85 * partitions must be explicitly selected. Once selected only the region of
86 * the device covered by that partition is accessible.
88 * The MMC standard provides for two boot partitions (numbered 1 and 2),
89 * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
91 * @dev_num: Block device number (struct blk_desc->dev value)
92 * @hwpart: Hardware partition number to select. 0 means the raw device,
93 * 1 is the first partition, 2 is the second, etc.
94 * @return 0 if OK, other value for an error
96 int mmc_select_hwpart(int dev_num, int hwpart);
97 struct blk_desc *systemace_get_dev(int dev);
98 struct blk_desc *mg_disk_get_dev(int dev);
99 struct blk_desc *host_get_dev(int dev);
100 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
103 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info);
104 void part_print(struct blk_desc *dev_desc);
105 void part_init(struct blk_desc *dev_desc);
106 void dev_print(struct blk_desc *dev_desc);
109 * blk_get_device_by_str() - Get a block device given its interface/hw partition
111 * Each interface allocates its own devices and typically struct blk_desc is
112 * contained with the interface's data structure. There is no global
113 * numbering for block devices, so the interface name must be provided.
115 * The hardware parition is not related to the normal software partitioning
116 * of a device - each hardware partition is effectively a separately
117 * accessible block device. When a hardware parition is selected on MMC the
118 * other hardware partitions become inaccessible. The same block device is
119 * used to access all hardware partitions, but its capacity may change when a
120 * different hardware partition is selected.
122 * When a hardware partition number is given, the block device switches to
123 * that hardware partition.
125 * @ifname: Interface name (e.g. "ide", "scsi")
126 * @dev_str: Device and optional hw partition. This can either be a string
127 * containing the device number (e.g. "2") or the device number
128 * and hardware partition number (e.g. "2.4") for devices that
129 * support it (currently only MMC).
130 * @dev_desc: Returns a pointer to the block device on success
131 * @return block device number (local to the interface), or -1 on error
133 int blk_get_device_by_str(const char *ifname, const char *dev_str,
134 struct blk_desc **dev_desc);
137 * blk_get_device_part_str() - Get a block device and partition
139 * This calls blk_get_device_by_str() to look up a device. It also looks up
140 * a partition and returns information about it.
142 * @dev_part_str is in the format:
143 * <dev>.<hw_part>:<part> where <dev> is the device number,
144 * <hw_part> is the optional hardware partition number and
145 * <part> is the partition number
147 * If ifname is "hostfs" then this function returns the sandbox host block
150 * If ifname is ubi, then this function returns 0, with @info set to a
151 * special UBI device.
153 * If @dev_part_str is NULL or empty or "-", then this function looks up
154 * the "bootdevice" environment variable and uses that string instead.
156 * If the partition string is empty then the first partition is used. If the
157 * partition string is "auto" then the first bootable partition is used.
159 * @ifname: Interface name (e.g. "ide", "scsi")
160 * @dev_part_str: Device and partition string
161 * @dev_desc: Returns a pointer to the block device on success
162 * @info: Returns partition information
163 * @allow_whole_dev: true to allow the user to select partition 0
164 * (which means the whole device), false to require a valid
165 * partition number >= 1
166 * @return partition number, or -1 on error
169 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
170 struct blk_desc **dev_desc,
171 disk_partition_t *info, int allow_whole_dev);
172 extern const struct block_drvr block_drvr[];
174 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
176 static inline struct blk_desc *sata_get_dev(int dev) { return NULL; }
177 static inline struct blk_desc *scsi_get_dev(int dev) { return NULL; }
178 static inline struct blk_desc *mmc_get_dev(int dev) { return NULL; }
179 static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; }
180 static inline struct blk_desc *systemace_get_dev(int dev) { return NULL; }
181 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
182 static inline struct blk_desc *host_get_dev(int dev) { return NULL; }
184 static inline int part_get_info(struct blk_desc *dev_desc, int part,
185 disk_partition_t *info) { return -1; }
186 static inline void part_print(struct blk_desc *dev_desc) {}
187 static inline void part_init(struct blk_desc *dev_desc) {}
188 static inline void dev_print(struct blk_desc *dev_desc) {}
189 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
190 struct blk_desc **dev_desc)
192 static inline int blk_get_device_part_str(const char *ifname,
193 const char *dev_part_str,
194 struct blk_desc **dev_desc,
195 disk_partition_t *info,
197 { *dev_desc = NULL; return -1; }
201 * We don't support printing partition information in SPL and only support
202 * getting partition information in a few cases.
204 #ifdef CONFIG_SPL_BUILD
205 # define part_print_ptr(x) NULL
206 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
207 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
208 # define part_get_info_ptr(x) x
210 # define part_get_info_ptr(x) NULL
213 #define part_print_ptr(x) x
214 #define part_get_info_ptr(x) x
223 * get_info() - Get information about a partition
225 * @dev_desc: Block device descriptor
226 * @part: Partition number (1 = first)
227 * @info: Returns partition information
229 int (*get_info)(struct blk_desc *dev_desc, int part,
230 disk_partition_t *info);
233 * print() - Print partition information
235 * @dev_desc: Block device descriptor
237 void (*print)(struct blk_desc *dev_desc);
240 * test() - Test if a device contains this partition type
242 * @dev_desc: Block device descriptor
243 * @return 0 if the block device appears to contain this partition
246 int (*test)(struct blk_desc *dev_desc);
249 /* Declare a new U-Boot partition 'driver' */
250 #define U_BOOT_PART_TYPE(__name) \
251 ll_entry_declare(struct part_driver, __name, part_driver)
253 #ifdef CONFIG_EFI_PARTITION
254 #include <part_efi.h>
255 /* disk/part_efi.c */
257 * part_get_info_efi_by_name() - Find the specified GPT partition table entry
259 * @param dev_desc - block device descriptor
260 * @param gpt_name - the specified table entry name
261 * @param info - returns the disk partition info
263 * @return - '0' on match, '-1' on no match, otherwise error
265 int part_get_info_efi_by_name(struct blk_desc *dev_desc,
266 const char *name, disk_partition_t *info);
269 * write_gpt_table() - Write the GUID Partition Table to disk
271 * @param dev_desc - block device descriptor
272 * @param gpt_h - pointer to GPT header representation
273 * @param gpt_e - pointer to GPT partition table entries
275 * @return - zero on success, otherwise error
277 int write_gpt_table(struct blk_desc *dev_desc,
278 gpt_header *gpt_h, gpt_entry *gpt_e);
281 * gpt_fill_pte(): Fill the GPT partition table entry
283 * @param gpt_h - GPT header representation
284 * @param gpt_e - GPT partition table entries
285 * @param partitions - list of partitions
286 * @param parts - number of partitions
288 * @return zero on success
290 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
291 disk_partition_t *partitions, int parts);
294 * gpt_fill_header(): Fill the GPT header
296 * @param dev_desc - block device descriptor
297 * @param gpt_h - GPT header representation
298 * @param str_guid - disk guid string representation
299 * @param parts_count - number of partitions
301 * @return - error on str_guid conversion error
303 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
304 char *str_guid, int parts_count);
307 * gpt_restore(): Restore GPT partition table
309 * @param dev_desc - block device descriptor
310 * @param str_disk_guid - disk GUID
311 * @param partitions - list of partitions
312 * @param parts - number of partitions
314 * @return zero on success
316 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
317 disk_partition_t *partitions, const int parts_count);
320 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
322 * @param dev_desc - block device descriptor
323 * @param buf - buffer which contains the MBR and Primary GPT info
325 * @return - '0' on success, otherwise error
327 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
330 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
332 * @param dev_desc - block device descriptor
333 * @param buf - buffer which contains the MBR and Primary GPT info
335 * @return - '0' on success, otherwise error
337 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
340 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
341 * and partition table entries (PTE)
343 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
345 * @param dev_desc - block device descriptor
346 * @param gpt_head - pointer to GPT header data read from medium
347 * @param gpt_pte - pointer to GPT partition table enties read from medium
349 * @return - '0' on success, otherwise error
351 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
352 gpt_entry **gpt_pte);
355 * gpt_verify_partitions() - Function to check if partitions' name, start and
356 * size correspond to '$partitions' env variable
358 * This function checks if on medium stored GPT data is in sync with information
359 * provided in '$partitions' environment variable. Specificially, name, start
360 * and size of the partition is checked.
362 * @param dev_desc - block device descriptor
363 * @param partitions - partition data read from '$partitions' env variable
364 * @param parts - number of partitions read from '$partitions' env variable
365 * @param gpt_head - pointer to GPT header data read from medium
366 * @param gpt_pte - pointer to GPT partition table enties read from medium
368 * @return - '0' on success, otherwise error
370 int gpt_verify_partitions(struct blk_desc *dev_desc,
371 disk_partition_t *partitions, int parts,
372 gpt_header *gpt_head, gpt_entry **gpt_pte);