1 /* 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 #include <efi.h> 12 13 #ifdef CONFIG_SYS_64BIT_LBA 14 typedef uint64_t lbaint_t; 15 #define LBAFlength "ll" 16 #else 17 typedef ulong lbaint_t; 18 #define LBAFlength "l" 19 #endif 20 #define LBAF "%" LBAFlength "x" 21 #define LBAFU "%" LBAFlength "u" 22 23 /* Interface types: */ 24 enum if_type { 25 IF_TYPE_UNKNOWN = 0, 26 IF_TYPE_IDE, 27 IF_TYPE_SCSI, 28 IF_TYPE_ATAPI, 29 IF_TYPE_USB, 30 IF_TYPE_DOC, 31 IF_TYPE_MMC, 32 IF_TYPE_SD, 33 IF_TYPE_SATA, 34 IF_TYPE_HOST, 35 IF_TYPE_SYSTEMACE, 36 IF_TYPE_NVME, 37 IF_TYPE_RKNAND, 38 IF_TYPE_SPINAND, 39 IF_TYPE_SPINOR, 40 IF_TYPE_RAMDISK, 41 IF_TYPE_MTD, 42 IF_TYPE_COUNT, /* Number of interface types */ 43 }; 44 45 /* define mtd device devnum */ 46 #define BLK_MTD_NAND 0 47 #define BLK_MTD_SPI_NAND 1 48 #define BLK_MTD_SPI_NOR 2 49 50 #define BLK_VEN_SIZE 40 51 #define BLK_PRD_SIZE 20 52 #define BLK_REV_SIZE 8 53 54 /* define block device operation flags */ 55 #define BLK_PRE_RW 1 /* Block prepare read & write*/ 56 #define BLK_MTD_NBA_RW 2 /* MTD block non-block-aligned read & write */ 57 58 /* 59 * Identifies the partition table type (ie. MBR vs GPT GUID) signature 60 */ 61 enum sig_type { 62 SIG_TYPE_NONE, 63 SIG_TYPE_MBR, 64 SIG_TYPE_GUID, 65 66 SIG_TYPE_COUNT /* Number of signature types */ 67 }; 68 69 /* 70 * With driver model (CONFIG_BLK) this is uclass platform data, accessible 71 * with dev_get_uclass_platdata(dev) 72 */ 73 struct blk_desc { 74 /* 75 * TODO: With driver model we should be able to use the parent 76 * device's uclass instead. 77 */ 78 enum if_type if_type; /* type of the interface */ 79 int devnum; /* device number */ 80 unsigned char part_type; /* partition type */ 81 unsigned char target; /* target SCSI ID */ 82 unsigned char lun; /* target LUN */ 83 unsigned char hwpart; /* HW partition, e.g. for eMMC */ 84 unsigned char type; /* device type */ 85 unsigned char removable; /* removable device */ 86 unsigned char op_flag; /* Some special operation flags */ 87 #ifdef CONFIG_LBA48 88 /* device can use 48bit addr (ATA/ATAPI v7) */ 89 unsigned char lba48; 90 #endif 91 lbaint_t lba; /* number of blocks */ 92 unsigned long blksz; /* block size */ 93 int log2blksz; /* for convenience: log2(blksz) */ 94 char vendor[BLK_VEN_SIZE + 1]; /* device vendor string */ 95 char product[BLK_PRD_SIZE + 1]; /* device product number */ 96 char revision[BLK_REV_SIZE + 1]; /* firmware revision */ 97 enum sig_type sig_type; /* Partition table signature type */ 98 union { 99 uint32_t mbr_sig; /* MBR integer signature */ 100 efi_guid_t guid_sig; /* GPT GUID Signature */ 101 }; 102 #if CONFIG_IS_ENABLED(BLK) 103 /* 104 * For now we have a few functions which take struct blk_desc as a 105 * parameter. This field allows them to look up the associated 106 * device. Once these functions are removed we can drop this field. 107 */ 108 struct udevice *bdev; 109 #else 110 unsigned long (*block_read)(struct blk_desc *block_dev, 111 lbaint_t start, 112 lbaint_t blkcnt, 113 void *buffer); 114 unsigned long (*block_write)(struct blk_desc *block_dev, 115 lbaint_t start, 116 lbaint_t blkcnt, 117 const void *buffer); 118 unsigned long (*block_erase)(struct blk_desc *block_dev, 119 lbaint_t start, 120 lbaint_t blkcnt); 121 void *priv; /* driver private struct pointer */ 122 #endif 123 }; 124 125 #define BLOCK_CNT(size, blk_desc) (PAD_COUNT(size, blk_desc->blksz)) 126 #define PAD_TO_BLOCKSIZE(size, blk_desc) \ 127 (PAD_SIZE(size, blk_desc->blksz)) 128 129 #ifdef CONFIG_BLOCK_CACHE 130 /** 131 * blkcache_read() - attempt to read a set of blocks from cache 132 * 133 * @param iftype - IF_TYPE_x for type of device 134 * @param dev - device index of particular type 135 * @param start - starting block number 136 * @param blkcnt - number of blocks to read 137 * @param blksz - size in bytes of each block 138 * @param buf - buffer to contain cached data 139 * 140 * @return - '1' if block returned from cache, '0' otherwise. 141 */ 142 int blkcache_read(int iftype, int dev, 143 lbaint_t start, lbaint_t blkcnt, 144 unsigned long blksz, void *buffer); 145 146 /** 147 * blkcache_fill() - make data read from a block device available 148 * to the block cache 149 * 150 * @param iftype - IF_TYPE_x for type of device 151 * @param dev - device index of particular type 152 * @param start - starting block number 153 * @param blkcnt - number of blocks available 154 * @param blksz - size in bytes of each block 155 * @param buf - buffer containing data to cache 156 * 157 */ 158 void blkcache_fill(int iftype, int dev, 159 lbaint_t start, lbaint_t blkcnt, 160 unsigned long blksz, void const *buffer); 161 162 /** 163 * blkcache_invalidate() - discard the cache for a set of blocks 164 * because of a write or device (re)initialization. 165 * 166 * @param iftype - IF_TYPE_x for type of device 167 * @param dev - device index of particular type 168 */ 169 void blkcache_invalidate(int iftype, int dev); 170 171 /** 172 * blkcache_configure() - configure block cache 173 * 174 * @param blocks - maximum blocks per entry 175 * @param entries - maximum entries in cache 176 */ 177 void blkcache_configure(unsigned blocks, unsigned entries); 178 179 /* 180 * statistics of the block cache 181 */ 182 struct block_cache_stats { 183 unsigned hits; 184 unsigned misses; 185 unsigned entries; /* current entry count */ 186 unsigned max_blocks_per_entry; 187 unsigned max_entries; 188 }; 189 190 /** 191 * get_blkcache_stats() - return statistics and reset 192 * 193 * @param stats - statistics are copied here 194 */ 195 void blkcache_stats(struct block_cache_stats *stats); 196 197 #else 198 199 static inline int blkcache_read(int iftype, int dev, 200 lbaint_t start, lbaint_t blkcnt, 201 unsigned long blksz, void *buffer) 202 { 203 return 0; 204 } 205 206 static inline void blkcache_fill(int iftype, int dev, 207 lbaint_t start, lbaint_t blkcnt, 208 unsigned long blksz, void const *buffer) {} 209 210 static inline void blkcache_invalidate(int iftype, int dev) {} 211 212 #endif 213 214 #if CONFIG_IS_ENABLED(BLK) 215 struct udevice; 216 217 /* Operations on block devices */ 218 struct blk_ops { 219 /** 220 * read() - read from a block device 221 * 222 * @dev: Device to read from 223 * @start: Start block number to read (0=first) 224 * @blkcnt: Number of blocks to read 225 * @buffer: Destination buffer for data read 226 * @return number of blocks read, or -ve error number (see the 227 * IS_ERR_VALUE() macro 228 */ 229 unsigned long (*read)(struct udevice *dev, lbaint_t start, 230 lbaint_t blkcnt, void *buffer); 231 232 /** 233 * read_prepare() - read from a block device 234 * 235 * @dev: Device to read from 236 * @start: Start block number to read (0=first) 237 * @blkcnt: Number of blocks to read 238 * @buffer: Destination buffer for data read 239 * @return number of blocks read, or -ve error number (see the 240 * IS_ERR_VALUE() macro 241 */ 242 #ifdef CONFIG_SPL_BLK_READ_PREPARE 243 unsigned long (*read_prepare)(struct udevice *dev, lbaint_t start, 244 lbaint_t blkcnt, void *buffer); 245 #endif 246 /** 247 * write() - write to a block device 248 * 249 * @dev: Device to write to 250 * @start: Start block number to write (0=first) 251 * @blkcnt: Number of blocks to write 252 * @buffer: Source buffer for data to write 253 * @return number of blocks written, or -ve error number (see the 254 * IS_ERR_VALUE() macro 255 */ 256 unsigned long (*write)(struct udevice *dev, lbaint_t start, 257 lbaint_t blkcnt, const void *buffer); 258 259 /** 260 * erase() - erase a section of a block device 261 * 262 * @dev: Device to (partially) erase 263 * @start: Start block number to erase (0=first) 264 * @blkcnt: Number of blocks to erase 265 * @return number of blocks erased, or -ve error number (see the 266 * IS_ERR_VALUE() macro 267 */ 268 unsigned long (*erase)(struct udevice *dev, lbaint_t start, 269 lbaint_t blkcnt); 270 271 /** 272 * select_hwpart() - select a particular hardware partition 273 * 274 * Some devices (e.g. MMC) can support partitioning at the hardware 275 * level. This is quite separate from the normal idea of 276 * software-based partitions. MMC hardware partitions must be 277 * explicitly selected. Once selected only the region of the device 278 * covered by that partition is accessible. 279 * 280 * The MMC standard provides for two boot partitions (numbered 1 and 2), 281 * rpmb (3), and up to 4 addition general-purpose partitions (4-7). 282 * 283 * @desc: Block device to update 284 * @hwpart: Hardware partition number to select. 0 means the raw 285 * device, 1 is the first partition, 2 is the second, etc. 286 * @return 0 if OK, -ve on error 287 */ 288 int (*select_hwpart)(struct udevice *dev, int hwpart); 289 }; 290 291 #define blk_get_ops(dev) ((struct blk_ops *)(dev)->driver->ops) 292 293 /* 294 * These functions should take struct udevice instead of struct blk_desc, 295 * but this is convenient for migration to driver model. Add a 'd' prefix 296 * to the function operations, so that blk_read(), etc. can be reserved for 297 * functions with the correct arguments. 298 */ 299 unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start, 300 lbaint_t blkcnt, void *buffer); 301 #ifdef CONFIG_SPL_BLK_READ_PREPARE 302 unsigned long blk_dread_prepare(struct blk_desc *block_dev, lbaint_t start, 303 lbaint_t blkcnt, void *buffer); 304 #endif 305 unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start, 306 lbaint_t blkcnt, const void *buffer); 307 unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start, 308 lbaint_t blkcnt); 309 310 /** 311 * blk_find_device() - Find a block device 312 * 313 * This function does not activate the device. The device will be returned 314 * whether or not it is activated. 315 * 316 * @if_type: Interface type (enum if_type_t) 317 * @devnum: Device number (specific to each interface type) 318 * @devp: the device, if found 319 * @return 0 if found, -ENODEV if no device found, or other -ve error value 320 */ 321 int blk_find_device(int if_type, int devnum, struct udevice **devp); 322 323 /** 324 * blk_get_device() - Find and probe a block device ready for use 325 * 326 * @if_type: Interface type (enum if_type_t) 327 * @devnum: Device number (specific to each interface type) 328 * @devp: the device, if found 329 * @return 0 if found, -ENODEV if no device found, or other -ve error value 330 */ 331 int blk_get_device(int if_type, int devnum, struct udevice **devp); 332 333 /** 334 * blk_first_device() - Find the first device for a given interface 335 * 336 * The device is probed ready for use 337 * 338 * @devnum: Device number (specific to each interface type) 339 * @devp: the device, if found 340 * @return 0 if found, -ENODEV if no device, or other -ve error value 341 */ 342 int blk_first_device(int if_type, struct udevice **devp); 343 344 /** 345 * blk_next_device() - Find the next device for a given interface 346 * 347 * This can be called repeatedly after blk_first_device() to iterate through 348 * all devices of the given interface type. 349 * 350 * The device is probed ready for use 351 * 352 * @devp: On entry, the previous device returned. On exit, the next 353 * device, if found 354 * @return 0 if found, -ENODEV if no device, or other -ve error value 355 */ 356 int blk_next_device(struct udevice **devp); 357 358 /** 359 * blk_create_device() - Create a new block device 360 * 361 * @parent: Parent of the new device 362 * @drv_name: Driver name to use for the block device 363 * @name: Name for the device 364 * @if_type: Interface type (enum if_type_t) 365 * @devnum: Device number, specific to the interface type, or -1 to 366 * allocate the next available number 367 * @blksz: Block size of the device in bytes (typically 512) 368 * @size: Total size of the device in bytes 369 * @devp: the new device (which has not been probed) 370 */ 371 int blk_create_device(struct udevice *parent, const char *drv_name, 372 const char *name, int if_type, int devnum, int blksz, 373 lbaint_t size, struct udevice **devp); 374 375 /** 376 * blk_create_devicef() - Create a new named block device 377 * 378 * @parent: Parent of the new device 379 * @drv_name: Driver name to use for the block device 380 * @name: Name for the device (parent name is prepended) 381 * @if_type: Interface type (enum if_type_t) 382 * @devnum: Device number, specific to the interface type, or -1 to 383 * allocate the next available number 384 * @blksz: Block size of the device in bytes (typically 512) 385 * @size: Total size of the device in bytes 386 * @devp: the new device (which has not been probed) 387 */ 388 int blk_create_devicef(struct udevice *parent, const char *drv_name, 389 const char *name, int if_type, int devnum, int blksz, 390 lbaint_t size, struct udevice **devp); 391 392 /** 393 * blk_prepare_device() - Prepare a block device for use 394 * 395 * This reads partition information from the device if supported. 396 * 397 * @dev: Device to prepare 398 * @return 0 if ok, -ve on error 399 */ 400 int blk_prepare_device(struct udevice *dev); 401 402 /** 403 * blk_unbind_all() - Unbind all device of the given interface type 404 * 405 * The devices are removed and then unbound. 406 * 407 * @if_type: Interface type to unbind 408 * @return 0 if OK, -ve on error 409 */ 410 int blk_unbind_all(int if_type); 411 412 /** 413 * blk_find_max_devnum() - find the maximum device number for an interface type 414 * 415 * Finds the last allocated device number for an interface type @if_type. The 416 * next number is safe to use for a newly allocated device. 417 * 418 * @if_type: Interface type to scan 419 * @return maximum device number found, or -ENODEV if none, or other -ve on 420 * error 421 */ 422 int blk_find_max_devnum(enum if_type if_type); 423 424 /** 425 * blk_select_hwpart() - select a hardware partition 426 * 427 * Select a hardware partition if the device supports it (typically MMC does) 428 * 429 * @dev: Device to update 430 * @hwpart: Partition number to select 431 * @return 0 if OK, -ve on error 432 */ 433 int blk_select_hwpart(struct udevice *dev, int hwpart); 434 435 /** 436 * blk_get_from_parent() - obtain a block device by looking up its parent 437 * 438 * All devices with 439 */ 440 int blk_get_from_parent(struct udevice *parent, struct udevice **devp); 441 442 #else 443 #include <errno.h> 444 /* 445 * These functions should take struct udevice instead of struct blk_desc, 446 * but this is convenient for migration to driver model. Add a 'd' prefix 447 * to the function operations, so that blk_read(), etc. can be reserved for 448 * functions with the correct arguments. 449 */ 450 static inline ulong blk_dread(struct blk_desc *block_dev, lbaint_t start, 451 lbaint_t blkcnt, void *buffer) 452 { 453 ulong blks_read; 454 if (blkcache_read(block_dev->if_type, block_dev->devnum, 455 start, blkcnt, block_dev->blksz, buffer)) 456 return blkcnt; 457 458 /* 459 * We could check if block_read is NULL and return -ENOSYS. But this 460 * bloats the code slightly (cause some board to fail to build), and 461 * it would be an error to try an operation that does not exist. 462 */ 463 blks_read = block_dev->block_read(block_dev, start, blkcnt, buffer); 464 if (blks_read == blkcnt) 465 blkcache_fill(block_dev->if_type, block_dev->devnum, 466 start, blkcnt, block_dev->blksz, buffer); 467 468 return blks_read; 469 } 470 471 static inline ulong blk_dwrite(struct blk_desc *block_dev, lbaint_t start, 472 lbaint_t blkcnt, const void *buffer) 473 { 474 blkcache_invalidate(block_dev->if_type, block_dev->devnum); 475 return block_dev->block_write(block_dev, start, blkcnt, buffer); 476 } 477 478 static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start, 479 lbaint_t blkcnt) 480 { 481 blkcache_invalidate(block_dev->if_type, block_dev->devnum); 482 return block_dev->block_erase(block_dev, start, blkcnt); 483 } 484 485 /** 486 * struct blk_driver - Driver for block interface types 487 * 488 * This provides access to the block devices for each interface type. One 489 * driver should be provided using U_BOOT_LEGACY_BLK() for each interface 490 * type that is to be supported. 491 * 492 * @if_typename: Interface type name 493 * @if_type: Interface type 494 * @max_devs: Maximum number of devices supported 495 * @desc: Pointer to list of devices for this interface type, 496 * or NULL to use @get_dev() instead 497 */ 498 struct blk_driver { 499 const char *if_typename; 500 enum if_type if_type; 501 int max_devs; 502 struct blk_desc *desc; 503 /** 504 * get_dev() - get a pointer to a block device given its number 505 * 506 * Each interface allocates its own devices and typically 507 * struct blk_desc is contained with the interface's data structure. 508 * There is no global numbering for block devices. This method allows 509 * the device for an interface type to be obtained when @desc is NULL. 510 * 511 * @devnum: Device number (0 for first device on that interface, 512 * 1 for second, etc. 513 * @descp: Returns pointer to the block device on success 514 * @return 0 if OK, -ve on error 515 */ 516 int (*get_dev)(int devnum, struct blk_desc **descp); 517 518 /** 519 * select_hwpart() - Select a hardware partition 520 * 521 * Some devices (e.g. MMC) can support partitioning at the hardware 522 * level. This is quite separate from the normal idea of 523 * software-based partitions. MMC hardware partitions must be 524 * explicitly selected. Once selected only the region of the device 525 * covered by that partition is accessible. 526 * 527 * The MMC standard provides for two boot partitions (numbered 1 and 2), 528 * rpmb (3), and up to 4 addition general-purpose partitions (4-7). 529 * Partition 0 is the main user-data partition. 530 * 531 * @desc: Block device descriptor 532 * @hwpart: Hardware partition number to select. 0 means the main 533 * user-data partition, 1 is the first partition, 2 is 534 * the second, etc. 535 * @return 0 if OK, other value for an error 536 */ 537 int (*select_hwpart)(struct blk_desc *desc, int hwpart); 538 }; 539 540 /* 541 * Declare a new U-Boot legacy block driver. New drivers should use driver 542 * model (UCLASS_BLK). 543 */ 544 #define U_BOOT_LEGACY_BLK(__name) \ 545 ll_entry_declare(struct blk_driver, __name, blk_driver) 546 547 struct blk_driver *blk_driver_lookup_type(int if_type); 548 549 #endif /* !CONFIG_BLK */ 550 551 /** 552 * blk_get_devnum_by_typename() - Get a block device by type and number 553 * 554 * This looks through the available block devices of the given type, returning 555 * the one with the given @devnum. 556 * 557 * @if_type: Block device type 558 * @devnum: Device number 559 * @return point to block device descriptor, or NULL if not found 560 */ 561 struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum); 562 563 /** 564 * blk_get_devnum_by_type() - Get a block device by type name, and number 565 * 566 * This looks up the block device type based on @if_typename, then calls 567 * blk_get_devnum_by_type(). 568 * 569 * @if_typename: Block device type name 570 * @devnum: Device number 571 * @return point to block device descriptor, or NULL if not found 572 */ 573 struct blk_desc *blk_get_devnum_by_typename(const char *if_typename, 574 int devnum); 575 576 /** 577 * blk_dselect_hwpart() - select a hardware partition 578 * 579 * This selects a hardware partition (such as is supported by MMC). The block 580 * device size may change as this effectively points the block device to a 581 * partition at the hardware level. See the select_hwpart() method above. 582 * 583 * @desc: Block device descriptor for the device to select 584 * @hwpart: Partition number to select 585 * @return 0 if OK, -ve on error 586 */ 587 int blk_dselect_hwpart(struct blk_desc *desc, int hwpart); 588 589 /** 590 * blk_list_part() - list the partitions for block devices of a given type 591 * 592 * This looks up the partition type for each block device of type @if_type, 593 * then displays a list of partitions. 594 * 595 * @if_type: Block device type 596 * @return 0 if OK, -ENODEV if there is none of that type 597 */ 598 int blk_list_part(enum if_type if_type); 599 600 /** 601 * blk_list_devices() - list the block devices of a given type 602 * 603 * This lists each block device of the type @if_type, showing the capacity 604 * as well as type-specific information. 605 * 606 * @if_type: Block device type 607 */ 608 void blk_list_devices(enum if_type if_type); 609 610 /** 611 * blk_show_device() - show information about a given block device 612 * 613 * This shows the block device capacity as well as type-specific information. 614 * 615 * @if_type: Block device type 616 * @devnum: Device number 617 * @return 0 if OK, -ENODEV for invalid device number 618 */ 619 int blk_show_device(enum if_type if_type, int devnum); 620 621 /** 622 * blk_print_device_num() - show information about a given block device 623 * 624 * This is similar to blk_show_device() but returns an error if the block 625 * device type is unknown. 626 * 627 * @if_type: Block device type 628 * @devnum: Device number 629 * @return 0 if OK, -ENODEV for invalid device number, -ENOENT if the block 630 * device is not connected 631 */ 632 int blk_print_device_num(enum if_type if_type, int devnum); 633 634 /** 635 * blk_print_part_devnum() - print the partition information for a device 636 * 637 * @if_type: Block device type 638 * @devnum: Device number 639 * @return 0 if OK, -ENOENT if the block device is not connected, -ENOSYS if 640 * the interface type is not supported, other -ve on other error 641 */ 642 int blk_print_part_devnum(enum if_type if_type, int devnum); 643 644 /** 645 * blk_read_devnum() - read blocks from a device 646 * 647 * @if_type: Block device type 648 * @devnum: Device number 649 * @blkcnt: Number of blocks to read 650 * @buffer: Address to write data to 651 * @return number of blocks read, or -ve error number on error 652 */ 653 ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start, 654 lbaint_t blkcnt, void *buffer); 655 656 /** 657 * blk_write_devnum() - write blocks to a device 658 * 659 * @if_type: Block device type 660 * @devnum: Device number 661 * @blkcnt: Number of blocks to write 662 * @buffer: Address to read data from 663 * @return number of blocks written, or -ve error number on error 664 */ 665 ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start, 666 lbaint_t blkcnt, const void *buffer); 667 668 /** 669 * blk_select_hwpart_devnum() - select a hardware partition 670 * 671 * This is similar to blk_dselect_hwpart() but it looks up the interface and 672 * device number. 673 * 674 * @if_type: Block device type 675 * @devnum: Device number 676 * @hwpart: Partition number to select 677 * @return 0 if OK, -ve on error 678 */ 679 int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart); 680 681 /** 682 * blk_get_if_type_name() - Get the name of an interface type 683 * 684 * @if_type: Interface type to check 685 * @return name of interface, or NULL if none 686 */ 687 const char *blk_get_if_type_name(enum if_type if_type); 688 689 /** 690 * blk_common_cmd() - handle common commands with block devices 691 * 692 * @args: Number of arguments to the command (argv[0] is the command itself) 693 * @argv: Command arguments 694 * @if_type: Interface type 695 * @cur_devnump: Current device number for this interface type 696 * @return 0 if OK, CMD_RET_ERROR on error 697 */ 698 int blk_common_cmd(int argc, char * const argv[], enum if_type if_type, 699 int *cur_devnump); 700 701 /** 702 * if_typename_to_iftype() - get iftype according to iftype name 703 * 704 * @if_typename: iftype name 705 * @return iftype index 706 */ 707 enum if_type if_typename_to_iftype(const char *if_typename); 708 709 #endif 710