blob: 1965812a9d5a39f0148ce133a895a69b4058d07b [file] [log] [blame]
Simon Glass1a736612016-02-29 15:25:39 -07001/*
2 * (C) Copyright 2000-2004
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#ifndef BLK_H
9#define BLK_H
10
11#ifdef CONFIG_SYS_64BIT_LBA
12typedef uint64_t lbaint_t;
13#define LBAFlength "ll"
14#else
15typedef ulong lbaint_t;
16#define LBAFlength "l"
17#endif
18#define LBAF "%" LBAFlength "x"
19#define LBAFU "%" LBAFlength "u"
20
21/* Interface types: */
Simon Glass5ec4f1a2016-02-29 15:25:40 -070022enum if_type {
23 IF_TYPE_UNKNOWN = 0,
24 IF_TYPE_IDE,
25 IF_TYPE_SCSI,
26 IF_TYPE_ATAPI,
27 IF_TYPE_USB,
28 IF_TYPE_DOC,
29 IF_TYPE_MMC,
30 IF_TYPE_SD,
31 IF_TYPE_SATA,
32 IF_TYPE_HOST,
Simon Glass3ef85e32016-05-01 11:36:04 -060033 IF_TYPE_SYSTEMACE,
Zhikang Zhangffab6942017-08-03 02:30:56 -070034 IF_TYPE_NVME,
Simon Glass5ec4f1a2016-02-29 15:25:40 -070035
36 IF_TYPE_COUNT, /* Number of interface types */
37};
Simon Glass1a736612016-02-29 15:25:39 -070038
Bin Mengeb81b1a2017-09-10 05:12:50 -070039#define BLK_VEN_SIZE 40
40#define BLK_PRD_SIZE 20
41#define BLK_REV_SIZE 8
42
Simon Glass09d71aa2016-02-29 15:25:55 -070043/*
44 * With driver model (CONFIG_BLK) this is uclass platform data, accessible
45 * with dev_get_uclass_platdata(dev)
46 */
Simon Glass1a736612016-02-29 15:25:39 -070047struct blk_desc {
Simon Glass09d71aa2016-02-29 15:25:55 -070048 /*
49 * TODO: With driver model we should be able to use the parent
50 * device's uclass instead.
51 */
Simon Glass5ec4f1a2016-02-29 15:25:40 -070052 enum if_type if_type; /* type of the interface */
Simon Glassbcce53d2016-02-29 15:25:51 -070053 int devnum; /* device number */
Simon Glass1a736612016-02-29 15:25:39 -070054 unsigned char part_type; /* partition type */
55 unsigned char target; /* target SCSI ID */
56 unsigned char lun; /* target LUN */
57 unsigned char hwpart; /* HW partition, e.g. for eMMC */
58 unsigned char type; /* device type */
59 unsigned char removable; /* removable device */
60#ifdef CONFIG_LBA48
61 /* device can use 48bit addr (ATA/ATAPI v7) */
62 unsigned char lba48;
63#endif
64 lbaint_t lba; /* number of blocks */
65 unsigned long blksz; /* block size */
66 int log2blksz; /* for convenience: log2(blksz) */
Bin Mengeb81b1a2017-09-10 05:12:50 -070067 char vendor[BLK_VEN_SIZE + 1]; /* device vendor string */
68 char product[BLK_PRD_SIZE + 1]; /* device product number */
69 char revision[BLK_REV_SIZE + 1]; /* firmware revision */
Simon Glassc4d660d2017-07-04 13:31:19 -060070#if CONFIG_IS_ENABLED(BLK)
Simon Glassb6694a32016-05-01 13:52:33 -060071 /*
72 * For now we have a few functions which take struct blk_desc as a
73 * parameter. This field allows them to look up the associated
74 * device. Once these functions are removed we can drop this field.
75 */
Simon Glass09d71aa2016-02-29 15:25:55 -070076 struct udevice *bdev;
77#else
Simon Glass1a736612016-02-29 15:25:39 -070078 unsigned long (*block_read)(struct blk_desc *block_dev,
79 lbaint_t start,
80 lbaint_t blkcnt,
81 void *buffer);
82 unsigned long (*block_write)(struct blk_desc *block_dev,
83 lbaint_t start,
84 lbaint_t blkcnt,
85 const void *buffer);
86 unsigned long (*block_erase)(struct blk_desc *block_dev,
87 lbaint_t start,
88 lbaint_t blkcnt);
89 void *priv; /* driver private struct pointer */
Simon Glass09d71aa2016-02-29 15:25:55 -070090#endif
Simon Glass1a736612016-02-29 15:25:39 -070091};
92
93#define BLOCK_CNT(size, blk_desc) (PAD_COUNT(size, blk_desc->blksz))
94#define PAD_TO_BLOCKSIZE(size, blk_desc) \
95 (PAD_SIZE(size, blk_desc->blksz))
96
Eric Nelsone40cf342016-03-28 10:05:44 -070097#ifdef CONFIG_BLOCK_CACHE
98/**
99 * blkcache_read() - attempt to read a set of blocks from cache
100 *
101 * @param iftype - IF_TYPE_x for type of device
102 * @param dev - device index of particular type
103 * @param start - starting block number
104 * @param blkcnt - number of blocks to read
105 * @param blksz - size in bytes of each block
106 * @param buf - buffer to contain cached data
107 *
108 * @return - '1' if block returned from cache, '0' otherwise.
109 */
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700110int blkcache_read(int iftype, int dev,
111 lbaint_t start, lbaint_t blkcnt,
112 unsigned long blksz, void *buffer);
Eric Nelsone40cf342016-03-28 10:05:44 -0700113
114/**
115 * blkcache_fill() - make data read from a block device available
116 * to the block cache
117 *
118 * @param iftype - IF_TYPE_x for type of device
119 * @param dev - device index of particular type
120 * @param start - starting block number
121 * @param blkcnt - number of blocks available
122 * @param blksz - size in bytes of each block
123 * @param buf - buffer containing data to cache
124 *
125 */
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700126void blkcache_fill(int iftype, int dev,
127 lbaint_t start, lbaint_t blkcnt,
128 unsigned long blksz, void const *buffer);
Eric Nelsone40cf342016-03-28 10:05:44 -0700129
130/**
131 * blkcache_invalidate() - discard the cache for a set of blocks
132 * because of a write or device (re)initialization.
133 *
134 * @param iftype - IF_TYPE_x for type of device
135 * @param dev - device index of particular type
136 */
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700137void blkcache_invalidate(int iftype, int dev);
Eric Nelsone40cf342016-03-28 10:05:44 -0700138
139/**
140 * blkcache_configure() - configure block cache
141 *
142 * @param blocks - maximum blocks per entry
143 * @param entries - maximum entries in cache
144 */
145void blkcache_configure(unsigned blocks, unsigned entries);
146
147/*
148 * statistics of the block cache
149 */
150struct block_cache_stats {
151 unsigned hits;
152 unsigned misses;
153 unsigned entries; /* current entry count */
154 unsigned max_blocks_per_entry;
155 unsigned max_entries;
156};
157
158/**
159 * get_blkcache_stats() - return statistics and reset
160 *
161 * @param stats - statistics are copied here
162 */
163void blkcache_stats(struct block_cache_stats *stats);
164
165#else
166
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700167static inline int blkcache_read(int iftype, int dev,
168 lbaint_t start, lbaint_t blkcnt,
169 unsigned long blksz, void *buffer)
Eric Nelsone40cf342016-03-28 10:05:44 -0700170{
171 return 0;
172}
173
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700174static inline void blkcache_fill(int iftype, int dev,
175 lbaint_t start, lbaint_t blkcnt,
176 unsigned long blksz, void const *buffer) {}
Eric Nelsone40cf342016-03-28 10:05:44 -0700177
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700178static inline void blkcache_invalidate(int iftype, int dev) {}
Eric Nelsone40cf342016-03-28 10:05:44 -0700179
180#endif
181
Simon Glassc4d660d2017-07-04 13:31:19 -0600182#if CONFIG_IS_ENABLED(BLK)
Simon Glass09d71aa2016-02-29 15:25:55 -0700183struct udevice;
184
185/* Operations on block devices */
186struct blk_ops {
187 /**
188 * read() - read from a block device
189 *
190 * @dev: Device to read from
191 * @start: Start block number to read (0=first)
192 * @blkcnt: Number of blocks to read
193 * @buffer: Destination buffer for data read
194 * @return number of blocks read, or -ve error number (see the
195 * IS_ERR_VALUE() macro
196 */
197 unsigned long (*read)(struct udevice *dev, lbaint_t start,
198 lbaint_t blkcnt, void *buffer);
199
200 /**
201 * write() - write to a block device
202 *
203 * @dev: Device to write to
204 * @start: Start block number to write (0=first)
205 * @blkcnt: Number of blocks to write
206 * @buffer: Source buffer for data to write
207 * @return number of blocks written, or -ve error number (see the
208 * IS_ERR_VALUE() macro
209 */
210 unsigned long (*write)(struct udevice *dev, lbaint_t start,
211 lbaint_t blkcnt, const void *buffer);
212
213 /**
214 * erase() - erase a section of a block device
215 *
216 * @dev: Device to (partially) erase
217 * @start: Start block number to erase (0=first)
218 * @blkcnt: Number of blocks to erase
219 * @return number of blocks erased, or -ve error number (see the
220 * IS_ERR_VALUE() macro
221 */
222 unsigned long (*erase)(struct udevice *dev, lbaint_t start,
223 lbaint_t blkcnt);
Simon Glasscd0fb552016-05-01 13:52:30 -0600224
225 /**
226 * select_hwpart() - select a particular hardware partition
227 *
228 * Some devices (e.g. MMC) can support partitioning at the hardware
229 * level. This is quite separate from the normal idea of
230 * software-based partitions. MMC hardware partitions must be
231 * explicitly selected. Once selected only the region of the device
232 * covered by that partition is accessible.
233 *
234 * The MMC standard provides for two boot partitions (numbered 1 and 2),
235 * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
236 *
237 * @desc: Block device to update
238 * @hwpart: Hardware partition number to select. 0 means the raw
239 * device, 1 is the first partition, 2 is the second, etc.
240 * @return 0 if OK, -ve on error
241 */
242 int (*select_hwpart)(struct udevice *dev, int hwpart);
Simon Glass09d71aa2016-02-29 15:25:55 -0700243};
244
245#define blk_get_ops(dev) ((struct blk_ops *)(dev)->driver->ops)
246
247/*
248 * These functions should take struct udevice instead of struct blk_desc,
249 * but this is convenient for migration to driver model. Add a 'd' prefix
250 * to the function operations, so that blk_read(), etc. can be reserved for
251 * functions with the correct arguments.
252 */
253unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start,
254 lbaint_t blkcnt, void *buffer);
255unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
256 lbaint_t blkcnt, const void *buffer);
257unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
258 lbaint_t blkcnt);
259
260/**
Simon Glass61392812017-04-23 20:02:05 -0600261 * blk_find_device() - Find a block device
262 *
263 * This function does not activate the device. The device will be returned
264 * whether or not it is activated.
265 *
266 * @if_type: Interface type (enum if_type_t)
267 * @devnum: Device number (specific to each interface type)
268 * @devp: the device, if found
269 * @return 0 if found, -ENODEV if no device found, or other -ve error value
270 */
271int blk_find_device(int if_type, int devnum, struct udevice **devp);
272
273/**
Simon Glass09d71aa2016-02-29 15:25:55 -0700274 * blk_get_device() - Find and probe a block device ready for use
275 *
276 * @if_type: Interface type (enum if_type_t)
277 * @devnum: Device number (specific to each interface type)
278 * @devp: the device, if found
Simon Glass61392812017-04-23 20:02:05 -0600279 * @return 0 if found, -ENODEV if no device found, or other -ve error value
Simon Glass09d71aa2016-02-29 15:25:55 -0700280 */
281int blk_get_device(int if_type, int devnum, struct udevice **devp);
282
283/**
284 * blk_first_device() - Find the first device for a given interface
285 *
286 * The device is probed ready for use
287 *
288 * @devnum: Device number (specific to each interface type)
289 * @devp: the device, if found
290 * @return 0 if found, -ENODEV if no device, or other -ve error value
291 */
292int blk_first_device(int if_type, struct udevice **devp);
293
294/**
295 * blk_next_device() - Find the next device for a given interface
296 *
297 * This can be called repeatedly after blk_first_device() to iterate through
298 * all devices of the given interface type.
299 *
300 * The device is probed ready for use
301 *
302 * @devp: On entry, the previous device returned. On exit, the next
303 * device, if found
304 * @return 0 if found, -ENODEV if no device, or other -ve error value
305 */
306int blk_next_device(struct udevice **devp);
307
308/**
309 * blk_create_device() - Create a new block device
310 *
311 * @parent: Parent of the new device
312 * @drv_name: Driver name to use for the block device
313 * @name: Name for the device
314 * @if_type: Interface type (enum if_type_t)
Simon Glass52138fd2016-05-01 11:36:28 -0600315 * @devnum: Device number, specific to the interface type, or -1 to
316 * allocate the next available number
Simon Glass09d71aa2016-02-29 15:25:55 -0700317 * @blksz: Block size of the device in bytes (typically 512)
Jean-Jacques Hiblot5fe77022017-06-09 16:45:18 +0200318 * @lba: Total number of blocks of the device
Simon Glass09d71aa2016-02-29 15:25:55 -0700319 * @devp: the new device (which has not been probed)
320 */
321int blk_create_device(struct udevice *parent, const char *drv_name,
322 const char *name, int if_type, int devnum, int blksz,
Jean-Jacques Hiblot5fe77022017-06-09 16:45:18 +0200323 lbaint_t lba, struct udevice **devp);
Simon Glass09d71aa2016-02-29 15:25:55 -0700324
325/**
Simon Glass9107c972016-05-01 11:36:29 -0600326 * blk_create_devicef() - Create a new named block device
327 *
328 * @parent: Parent of the new device
329 * @drv_name: Driver name to use for the block device
330 * @name: Name for the device (parent name is prepended)
331 * @if_type: Interface type (enum if_type_t)
332 * @devnum: Device number, specific to the interface type, or -1 to
333 * allocate the next available number
334 * @blksz: Block size of the device in bytes (typically 512)
Jean-Jacques Hiblot5fe77022017-06-09 16:45:18 +0200335 * @lba: Total number of blocks of the device
Simon Glass9107c972016-05-01 11:36:29 -0600336 * @devp: the new device (which has not been probed)
337 */
338int blk_create_devicef(struct udevice *parent, const char *drv_name,
339 const char *name, int if_type, int devnum, int blksz,
Jean-Jacques Hiblot5fe77022017-06-09 16:45:18 +0200340 lbaint_t lba, struct udevice **devp);
Simon Glass9107c972016-05-01 11:36:29 -0600341
342/**
Simon Glass09d71aa2016-02-29 15:25:55 -0700343 * blk_prepare_device() - Prepare a block device for use
344 *
345 * This reads partition information from the device if supported.
346 *
347 * @dev: Device to prepare
348 * @return 0 if ok, -ve on error
349 */
350int blk_prepare_device(struct udevice *dev);
351
352/**
353 * blk_unbind_all() - Unbind all device of the given interface type
354 *
355 * The devices are removed and then unbound.
356 *
357 * @if_type: Interface type to unbind
358 * @return 0 if OK, -ve on error
359 */
360int blk_unbind_all(int if_type);
361
Simon Glass52138fd2016-05-01 11:36:28 -0600362/**
363 * blk_find_max_devnum() - find the maximum device number for an interface type
364 *
365 * Finds the last allocated device number for an interface type @if_type. The
366 * next number is safe to use for a newly allocated device.
367 *
368 * @if_type: Interface type to scan
369 * @return maximum device number found, or -ENODEV if none, or other -ve on
370 * error
371 */
372int blk_find_max_devnum(enum if_type if_type);
373
Simon Glasscd0fb552016-05-01 13:52:30 -0600374/**
375 * blk_select_hwpart() - select a hardware partition
376 *
377 * Select a hardware partition if the device supports it (typically MMC does)
378 *
379 * @dev: Device to update
380 * @hwpart: Partition number to select
381 * @return 0 if OK, -ve on error
382 */
383int blk_select_hwpart(struct udevice *dev, int hwpart);
384
Tom Rini4bdb49a2017-06-10 10:01:05 -0400385/**
386 * blk_get_from_parent() - obtain a block device by looking up its parent
387 *
388 * All devices with
389 */
390int blk_get_from_parent(struct udevice *parent, struct udevice **devp);
391
Simon Glass09d71aa2016-02-29 15:25:55 -0700392#else
393#include <errno.h>
Simon Glass2a981dc2016-02-29 15:25:52 -0700394/*
395 * These functions should take struct udevice instead of struct blk_desc,
396 * but this is convenient for migration to driver model. Add a 'd' prefix
397 * to the function operations, so that blk_read(), etc. can be reserved for
398 * functions with the correct arguments.
399 */
400static inline ulong blk_dread(struct blk_desc *block_dev, lbaint_t start,
401 lbaint_t blkcnt, void *buffer)
402{
Eric Nelsone40cf342016-03-28 10:05:44 -0700403 ulong blks_read;
404 if (blkcache_read(block_dev->if_type, block_dev->devnum,
405 start, blkcnt, block_dev->blksz, buffer))
406 return blkcnt;
407
Simon Glass2a981dc2016-02-29 15:25:52 -0700408 /*
409 * We could check if block_read is NULL and return -ENOSYS. But this
410 * bloats the code slightly (cause some board to fail to build), and
411 * it would be an error to try an operation that does not exist.
412 */
Eric Nelsone40cf342016-03-28 10:05:44 -0700413 blks_read = block_dev->block_read(block_dev, start, blkcnt, buffer);
414 if (blks_read == blkcnt)
415 blkcache_fill(block_dev->if_type, block_dev->devnum,
416 start, blkcnt, block_dev->blksz, buffer);
417
418 return blks_read;
Simon Glass2a981dc2016-02-29 15:25:52 -0700419}
420
421static inline ulong blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
422 lbaint_t blkcnt, const void *buffer)
423{
Eric Nelsone40cf342016-03-28 10:05:44 -0700424 blkcache_invalidate(block_dev->if_type, block_dev->devnum);
Simon Glass2a981dc2016-02-29 15:25:52 -0700425 return block_dev->block_write(block_dev, start, blkcnt, buffer);
426}
427
428static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start,
429 lbaint_t blkcnt)
430{
Eric Nelsone40cf342016-03-28 10:05:44 -0700431 blkcache_invalidate(block_dev->if_type, block_dev->devnum);
Simon Glass2a981dc2016-02-29 15:25:52 -0700432 return block_dev->block_erase(block_dev, start, blkcnt);
433}
Simon Glass6eef6ea2016-05-01 11:36:03 -0600434
435/**
436 * struct blk_driver - Driver for block interface types
437 *
438 * This provides access to the block devices for each interface type. One
439 * driver should be provided using U_BOOT_LEGACY_BLK() for each interface
440 * type that is to be supported.
441 *
442 * @if_typename: Interface type name
443 * @if_type: Interface type
444 * @max_devs: Maximum number of devices supported
445 * @desc: Pointer to list of devices for this interface type,
446 * or NULL to use @get_dev() instead
447 */
448struct blk_driver {
449 const char *if_typename;
450 enum if_type if_type;
451 int max_devs;
452 struct blk_desc *desc;
453 /**
454 * get_dev() - get a pointer to a block device given its number
455 *
456 * Each interface allocates its own devices and typically
457 * struct blk_desc is contained with the interface's data structure.
458 * There is no global numbering for block devices. This method allows
459 * the device for an interface type to be obtained when @desc is NULL.
460 *
461 * @devnum: Device number (0 for first device on that interface,
462 * 1 for second, etc.
463 * @descp: Returns pointer to the block device on success
464 * @return 0 if OK, -ve on error
465 */
466 int (*get_dev)(int devnum, struct blk_desc **descp);
467
468 /**
469 * select_hwpart() - Select a hardware partition
470 *
471 * Some devices (e.g. MMC) can support partitioning at the hardware
472 * level. This is quite separate from the normal idea of
473 * software-based partitions. MMC hardware partitions must be
474 * explicitly selected. Once selected only the region of the device
475 * covered by that partition is accessible.
476 *
477 * The MMC standard provides for two boot partitions (numbered 1 and 2),
478 * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
479 * Partition 0 is the main user-data partition.
480 *
481 * @desc: Block device descriptor
482 * @hwpart: Hardware partition number to select. 0 means the main
483 * user-data partition, 1 is the first partition, 2 is
484 * the second, etc.
485 * @return 0 if OK, other value for an error
486 */
487 int (*select_hwpart)(struct blk_desc *desc, int hwpart);
488};
489
490/*
491 * Declare a new U-Boot legacy block driver. New drivers should use driver
492 * model (UCLASS_BLK).
493 */
494#define U_BOOT_LEGACY_BLK(__name) \
495 ll_entry_declare(struct blk_driver, __name, blk_driver)
496
497struct blk_driver *blk_driver_lookup_type(int if_type);
498
Simon Glass09d71aa2016-02-29 15:25:55 -0700499#endif /* !CONFIG_BLK */
Simon Glass2a981dc2016-02-29 15:25:52 -0700500
Simon Glass6eef6ea2016-05-01 11:36:03 -0600501/**
502 * blk_get_devnum_by_typename() - Get a block device by type and number
503 *
504 * This looks through the available block devices of the given type, returning
505 * the one with the given @devnum.
506 *
507 * @if_type: Block device type
508 * @devnum: Device number
509 * @return point to block device descriptor, or NULL if not found
510 */
511struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum);
512
513/**
514 * blk_get_devnum_by_type() - Get a block device by type name, and number
515 *
516 * This looks up the block device type based on @if_typename, then calls
517 * blk_get_devnum_by_type().
518 *
519 * @if_typename: Block device type name
520 * @devnum: Device number
521 * @return point to block device descriptor, or NULL if not found
522 */
523struct blk_desc *blk_get_devnum_by_typename(const char *if_typename,
524 int devnum);
525
526/**
527 * blk_dselect_hwpart() - select a hardware partition
528 *
529 * This selects a hardware partition (such as is supported by MMC). The block
530 * device size may change as this effectively points the block device to a
531 * partition at the hardware level. See the select_hwpart() method above.
532 *
533 * @desc: Block device descriptor for the device to select
534 * @hwpart: Partition number to select
535 * @return 0 if OK, -ve on error
536 */
537int blk_dselect_hwpart(struct blk_desc *desc, int hwpart);
538
539/**
540 * blk_list_part() - list the partitions for block devices of a given type
541 *
542 * This looks up the partition type for each block device of type @if_type,
543 * then displays a list of partitions.
544 *
545 * @if_type: Block device type
546 * @return 0 if OK, -ENODEV if there is none of that type
547 */
548int blk_list_part(enum if_type if_type);
549
550/**
551 * blk_list_devices() - list the block devices of a given type
552 *
553 * This lists each block device of the type @if_type, showing the capacity
554 * as well as type-specific information.
555 *
556 * @if_type: Block device type
557 */
558void blk_list_devices(enum if_type if_type);
559
560/**
561 * blk_show_device() - show information about a given block device
562 *
563 * This shows the block device capacity as well as type-specific information.
564 *
565 * @if_type: Block device type
566 * @devnum: Device number
567 * @return 0 if OK, -ENODEV for invalid device number
568 */
569int blk_show_device(enum if_type if_type, int devnum);
570
571/**
572 * blk_print_device_num() - show information about a given block device
573 *
574 * This is similar to blk_show_device() but returns an error if the block
575 * device type is unknown.
576 *
577 * @if_type: Block device type
578 * @devnum: Device number
579 * @return 0 if OK, -ENODEV for invalid device number, -ENOENT if the block
580 * device is not connected
581 */
582int blk_print_device_num(enum if_type if_type, int devnum);
583
584/**
585 * blk_print_part_devnum() - print the partition information for a device
586 *
587 * @if_type: Block device type
588 * @devnum: Device number
589 * @return 0 if OK, -ENOENT if the block device is not connected, -ENOSYS if
590 * the interface type is not supported, other -ve on other error
591 */
592int blk_print_part_devnum(enum if_type if_type, int devnum);
593
594/**
595 * blk_read_devnum() - read blocks from a device
596 *
597 * @if_type: Block device type
598 * @devnum: Device number
599 * @blkcnt: Number of blocks to read
600 * @buffer: Address to write data to
601 * @return number of blocks read, or -ve error number on error
602 */
603ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
604 lbaint_t blkcnt, void *buffer);
605
606/**
607 * blk_write_devnum() - write blocks to a device
608 *
609 * @if_type: Block device type
610 * @devnum: Device number
611 * @blkcnt: Number of blocks to write
612 * @buffer: Address to read data from
613 * @return number of blocks written, or -ve error number on error
614 */
615ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
616 lbaint_t blkcnt, const void *buffer);
617
618/**
619 * blk_select_hwpart_devnum() - select a hardware partition
620 *
621 * This is similar to blk_dselect_hwpart() but it looks up the interface and
622 * device number.
623 *
624 * @if_type: Block device type
625 * @devnum: Device number
626 * @hwpart: Partition number to select
627 * @return 0 if OK, -ve on error
628 */
629int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart);
630
Simon Glass6faa4ed2017-07-29 11:34:53 -0600631/**
632 * blk_get_if_type_name() - Get the name of an interface type
633 *
634 * @if_type: Interface type to check
635 * @return name of interface, or NULL if none
636 */
637const char *blk_get_if_type_name(enum if_type if_type);
638
Simon Glass4395f662017-07-29 11:34:54 -0600639/**
640 * blk_common_cmd() - handle common commands with block devices
641 *
642 * @args: Number of arguments to the command (argv[0] is the command itself)
643 * @argv: Command arguments
644 * @if_type: Interface type
645 * @cur_devnump: Current device number for this interface type
646 * @return 0 if OK, CMD_RET_ERROR on error
647 */
648int blk_common_cmd(int argc, char * const argv[], enum if_type if_type,
649 int *cur_devnump);
650
Simon Glass1a736612016-02-29 15:25:39 -0700651#endif