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