2 * (C) Copyright 2000-2004
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);
80 * mmc_select_hwpart() - Select the MMC hardware partiion on an MMC device
82 * MMC devices can support partitioning at the hardware level. This is quite
83 * separate from the normal idea of software-based partitions. MMC hardware
84 * partitions must be explicitly selected. Once selected only the region of
85 * the device covered by that partition is accessible.
87 * The MMC standard provides for two boot partitions (numbered 1 and 2),
88 * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
90 * @dev_num: Block device number (struct blk_desc->dev value)
91 * @hwpart: Hardware partition number to select. 0 means the raw device,
92 * 1 is the first partition, 2 is the second, etc.
93 * @return 0 if OK, other value for an error
95 int mmc_select_hwpart(int dev_num, int hwpart);
96 struct blk_desc *systemace_get_dev(int dev);
97 struct blk_desc *mg_disk_get_dev(int dev);
98 struct blk_desc *host_get_dev(int dev);
99 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
102 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info);
103 void part_print(struct blk_desc *dev_desc);
104 void part_init(struct blk_desc *dev_desc);
105 void dev_print(struct blk_desc *dev_desc);
108 * blk_get_device_by_str() - Get a block device given its interface/hw partition
110 * Each interface allocates its own devices and typically struct blk_desc is
111 * contained with the interface's data structure. There is no global
112 * numbering for block devices, so the interface name must be provided.
114 * The hardware parition is not related to the normal software partitioning
115 * of a device - each hardware partition is effectively a separately
116 * accessible block device. When a hardware parition is selected on MMC the
117 * other hardware partitions become inaccessible. The same block device is
118 * used to access all hardware partitions, but its capacity may change when a
119 * different hardware partition is selected.
121 * When a hardware partition number is given, the block device switches to
122 * that hardware partition.
124 * @ifname: Interface name (e.g. "ide", "scsi")
125 * @dev_str: Device and optional hw partition. This can either be a string
126 * containing the device number (e.g. "2") or the device number
127 * and hardware partition number (e.g. "2.4") for devices that
128 * support it (currently only MMC).
129 * @dev_desc: Returns a pointer to the block device on success
130 * @return block device number (local to the interface), or -1 on error
132 int blk_get_device_by_str(const char *ifname, const char *dev_str,
133 struct blk_desc **dev_desc);
136 * blk_get_device_part_str() - Get a block device and partition
138 * This calls blk_get_device_by_str() to look up a device. It also looks up
139 * a partition and returns information about it.
141 * @dev_part_str is in the format:
142 * <dev>.<hw_part>:<part> where <dev> is the device number,
143 * <hw_part> is the optional hardware partition number and
144 * <part> is the partition number
146 * If ifname is "hostfs" then this function returns the sandbox host block
149 * If ifname is ubi, then this function returns 0, with @info set to a
150 * special UBI device.
152 * If @dev_part_str is NULL or empty or "-", then this function looks up
153 * the "bootdevice" environment variable and uses that string instead.
155 * If the partition string is empty then the first partition is used. If the
156 * partition string is "auto" then the first bootable partition is used.
158 * @ifname: Interface name (e.g. "ide", "scsi")
159 * @dev_part_str: Device and partition string
160 * @dev_desc: Returns a pointer to the block device on success
161 * @info: Returns partition information
162 * @allow_whole_dev: true to allow the user to select partition 0
163 * (which means the whole device), false to require a valid
164 * partition number >= 1
165 * @return partition number, or -1 on error
168 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
169 struct blk_desc **dev_desc,
170 disk_partition_t *info, int allow_whole_dev);
171 extern const struct block_drvr block_drvr[];
173 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
175 static inline struct blk_desc *sata_get_dev(int dev) { return NULL; }
176 static inline struct blk_desc *scsi_get_dev(int dev) { return NULL; }
177 static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; }
178 static inline struct blk_desc *systemace_get_dev(int dev) { return NULL; }
179 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
180 static inline struct blk_desc *host_get_dev(int dev) { return NULL; }
182 static inline int part_get_info(struct blk_desc *dev_desc, int part,
183 disk_partition_t *info) { return -1; }
184 static inline void part_print(struct blk_desc *dev_desc) {}
185 static inline void part_init(struct blk_desc *dev_desc) {}
186 static inline void dev_print(struct blk_desc *dev_desc) {}
187 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
188 struct blk_desc **dev_desc)
190 static inline int blk_get_device_part_str(const char *ifname,
191 const char *dev_part_str,
192 struct blk_desc **dev_desc,
193 disk_partition_t *info,
195 { *dev_desc = NULL; return -1; }
199 * We don't support printing partition information in SPL and only support
200 * getting partition information in a few cases.
202 #ifdef CONFIG_SPL_BUILD
203 # define part_print_ptr(x) NULL
204 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
205 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
206 # define part_get_info_ptr(x) x
208 # define part_get_info_ptr(x) NULL
211 #define part_print_ptr(x) x
212 #define part_get_info_ptr(x) x
221 * get_info() - Get information about a partition
223 * @dev_desc: Block device descriptor
224 * @part: Partition number (1 = first)
225 * @info: Returns partition information
227 int (*get_info)(struct blk_desc *dev_desc, int part,
228 disk_partition_t *info);
231 * print() - Print partition information
233 * @dev_desc: Block device descriptor
235 void (*print)(struct blk_desc *dev_desc);
238 * test() - Test if a device contains this partition type
240 * @dev_desc: Block device descriptor
241 * @return 0 if the block device appears to contain this partition
244 int (*test)(struct blk_desc *dev_desc);
247 /* Declare a new U-Boot partition 'driver' */
248 #define U_BOOT_PART_TYPE(__name) \
249 ll_entry_declare(struct part_driver, __name, part_driver)
251 #ifdef CONFIG_EFI_PARTITION
252 #include <part_efi.h>
253 /* disk/part_efi.c */
255 * part_get_info_efi_by_name() - Find the specified GPT partition table entry
257 * @param dev_desc - block device descriptor
258 * @param gpt_name - the specified table entry name
259 * @param info - returns the disk partition info
261 * @return - '0' on match, '-1' on no match, otherwise error
263 int part_get_info_efi_by_name(struct blk_desc *dev_desc,
264 const char *name, disk_partition_t *info);
267 * write_gpt_table() - Write the GUID Partition Table to disk
269 * @param dev_desc - block device descriptor
270 * @param gpt_h - pointer to GPT header representation
271 * @param gpt_e - pointer to GPT partition table entries
273 * @return - zero on success, otherwise error
275 int write_gpt_table(struct blk_desc *dev_desc,
276 gpt_header *gpt_h, gpt_entry *gpt_e);
279 * gpt_fill_pte(): Fill the GPT partition table entry
281 * @param gpt_h - GPT header representation
282 * @param gpt_e - GPT partition table entries
283 * @param partitions - list of partitions
284 * @param parts - number of partitions
286 * @return zero on success
288 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
289 disk_partition_t *partitions, int parts);
292 * gpt_fill_header(): Fill the GPT header
294 * @param dev_desc - block device descriptor
295 * @param gpt_h - GPT header representation
296 * @param str_guid - disk guid string representation
297 * @param parts_count - number of partitions
299 * @return - error on str_guid conversion error
301 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
302 char *str_guid, int parts_count);
305 * gpt_restore(): Restore GPT partition table
307 * @param dev_desc - block device descriptor
308 * @param str_disk_guid - disk GUID
309 * @param partitions - list of partitions
310 * @param parts - number of partitions
312 * @return zero on success
314 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
315 disk_partition_t *partitions, const int parts_count);
318 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
320 * @param dev_desc - block device descriptor
321 * @param buf - buffer which contains the MBR and Primary GPT info
323 * @return - '0' on success, otherwise error
325 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
328 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
330 * @param dev_desc - block device descriptor
331 * @param buf - buffer which contains the MBR and Primary GPT info
333 * @return - '0' on success, otherwise error
335 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
338 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
339 * and partition table entries (PTE)
341 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
343 * @param dev_desc - block device descriptor
344 * @param gpt_head - pointer to GPT header data read from medium
345 * @param gpt_pte - pointer to GPT partition table enties read from medium
347 * @return - '0' on success, otherwise error
349 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
350 gpt_entry **gpt_pte);
353 * gpt_verify_partitions() - Function to check if partitions' name, start and
354 * size correspond to '$partitions' env variable
356 * This function checks if on medium stored GPT data is in sync with information
357 * provided in '$partitions' environment variable. Specificially, name, start
358 * and size of the partition is checked.
360 * @param dev_desc - block device descriptor
361 * @param partitions - partition data read from '$partitions' env variable
362 * @param parts - number of partitions read from '$partitions' env variable
363 * @param gpt_head - pointer to GPT header data read from medium
364 * @param gpt_pte - pointer to GPT partition table enties read from medium
366 * @return - '0' on success, otherwise error
368 int gpt_verify_partitions(struct blk_desc *dev_desc,
369 disk_partition_t *partitions, int parts,
370 gpt_header *gpt_head, gpt_entry **gpt_pte);