1 /* Simple code to turn various tables in an ELF file into alias definitions. 2 * This deals with kernel datastructures where they should be 3 * dealt with: in the kernel source. 4 * 5 * Copyright 2002-2003 Rusty Russell, IBM Corporation 6 * 2003 Kai Germaschewski 7 * 8 * 9 * This software may be used and distributed according to the terms 10 * of the GNU General Public License, incorporated herein by reference. 11 */ 12 13 #include <stdarg.h> 14 #include <stdio.h> 15 16 #include "list.h" 17 #include "xalloc.h" 18 19 #include "modpost.h" 20 #include "devicetable-offsets.h" 21 22 /* We use the ELF typedefs for kernel_ulong_t but bite the bullet and 23 * use either stdint.h or inttypes.h for the rest. */ 24 #if KERNEL_ELFCLASS == ELFCLASS32 25 typedef Elf32_Addr kernel_ulong_t; 26 #define BITS_PER_LONG 32 27 #else 28 typedef Elf64_Addr kernel_ulong_t; 29 #define BITS_PER_LONG 64 30 #endif 31 #ifdef __sun__ 32 #include <inttypes.h> 33 #else 34 #include <stdint.h> 35 #endif 36 37 #include <ctype.h> 38 #include <stdbool.h> 39 40 /** 41 * module_alias_printf - add auto-generated MODULE_ALIAS() 42 * 43 * @mod: module 44 * @append_wildcard: append '*' for future extension if not exist yet 45 * @fmt: printf(3)-like format 46 */ 47 static void __attribute__((format (printf, 3, 4))) 48 module_alias_printf(struct module *mod, bool append_wildcard, 49 const char *fmt, ...) 50 { 51 struct module_alias *new, *als; 52 size_t len; 53 int n; 54 va_list ap; 55 56 /* Determine required size. */ 57 va_start(ap, fmt); 58 n = vsnprintf(NULL, 0, fmt, ap); 59 va_end(ap); 60 61 if (n < 0) { 62 error("vsnprintf failed\n"); 63 return; 64 } 65 66 len = n + 1; /* extra byte for '\0' */ 67 68 if (append_wildcard) 69 len++; /* extra byte for '*' */ 70 71 new = xmalloc(sizeof(*new) + len); 72 73 /* Now, really print it to the allocated buffer */ 74 va_start(ap, fmt); 75 n = vsnprintf(new->str, len, fmt, ap); 76 va_end(ap); 77 78 if (n < 0) { 79 error("vsnprintf failed\n"); 80 free(new); 81 return; 82 } 83 84 if (append_wildcard && (n == 0 || new->str[n - 1] != '*')) { 85 new->str[n] = '*'; 86 new->str[n + 1] = '\0'; 87 } 88 89 /* avoid duplication */ 90 list_for_each_entry(als, &mod->aliases, node) { 91 if (!strcmp(als->str, new->str)) { 92 free(new); 93 return; 94 } 95 } 96 97 new->builtin_modname = NULL; 98 list_add_tail(&new->node, &mod->aliases); 99 } 100 101 typedef uint32_t __u32; 102 typedef uint16_t __u16; 103 typedef unsigned char __u8; 104 105 /* UUID types for backward compatibility, don't use in new code */ 106 typedef struct { 107 __u8 b[16]; 108 } guid_t; 109 110 typedef struct { 111 __u8 b[16]; 112 } uuid_t; 113 114 #define UUID_STRING_LEN 36 115 116 /* MEI UUID type, don't use anywhere else */ 117 typedef struct { 118 __u8 b[16]; 119 } uuid_le; 120 121 /* Big exception to the "don't include kernel headers into userspace, which 122 * even potentially has different endianness and word sizes, since 123 * we handle those differences explicitly below */ 124 #include "../../include/linux/mod_devicetable.h" 125 126 struct devtable { 127 const char *device_id; 128 unsigned long id_size; 129 void (*do_entry)(struct module *mod, void *symval); 130 }; 131 132 /* Define a variable f that holds the value of field f of struct devid 133 * based at address m. 134 */ 135 #define DEF_FIELD(m, devid, f) \ 136 typeof(((struct devid *)0)->f) f = \ 137 get_unaligned_native((typeof(f) *)((m) + OFF_##devid##_##f)) 138 139 /* Define a variable f that holds the address of field f of struct devid 140 * based at address m. Due to the way typeof works, for a field of type 141 * T[N] the variable has type T(*)[N], _not_ T*. 142 */ 143 #define DEF_FIELD_ADDR(m, devid, f) \ 144 typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f) 145 146 #define ADD(str, sep, cond, field) \ 147 do { \ 148 strcat(str, sep); \ 149 if (cond) \ 150 sprintf(str + strlen(str), \ 151 sizeof(field) == 1 ? "%02X" : \ 152 sizeof(field) == 2 ? "%04X" : \ 153 sizeof(field) == 4 ? "%08X" : "", \ 154 field); \ 155 else \ 156 sprintf(str + strlen(str), "*"); \ 157 } while(0) 158 159 static inline void add_uuid(char *str, uuid_le uuid) 160 { 161 int len = strlen(str); 162 163 sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", 164 uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0], 165 uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6], 166 uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11], 167 uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]); 168 } 169 170 static inline void add_guid(char *str, guid_t guid) 171 { 172 int len = strlen(str); 173 174 sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X", 175 guid.b[3], guid.b[2], guid.b[1], guid.b[0], 176 guid.b[5], guid.b[4], guid.b[7], guid.b[6], 177 guid.b[8], guid.b[9], guid.b[10], guid.b[11], 178 guid.b[12], guid.b[13], guid.b[14], guid.b[15]); 179 } 180 181 /* USB is special because the bcdDevice can be matched against a numeric range */ 182 /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */ 183 static void do_usb_entry(void *symval, 184 unsigned int bcdDevice_initial, int bcdDevice_initial_digits, 185 unsigned char range_lo, unsigned char range_hi, 186 unsigned char max, struct module *mod) 187 { 188 char alias[500]; 189 DEF_FIELD(symval, usb_device_id, match_flags); 190 DEF_FIELD(symval, usb_device_id, idVendor); 191 DEF_FIELD(symval, usb_device_id, idProduct); 192 DEF_FIELD(symval, usb_device_id, bcdDevice_lo); 193 DEF_FIELD(symval, usb_device_id, bDeviceClass); 194 DEF_FIELD(symval, usb_device_id, bDeviceSubClass); 195 DEF_FIELD(symval, usb_device_id, bDeviceProtocol); 196 DEF_FIELD(symval, usb_device_id, bInterfaceClass); 197 DEF_FIELD(symval, usb_device_id, bInterfaceSubClass); 198 DEF_FIELD(symval, usb_device_id, bInterfaceProtocol); 199 DEF_FIELD(symval, usb_device_id, bInterfaceNumber); 200 201 strcpy(alias, "usb:"); 202 ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR, 203 idVendor); 204 ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT, 205 idProduct); 206 207 strcat(alias, "d"); 208 if (bcdDevice_initial_digits) 209 sprintf(alias + strlen(alias), "%0*X", 210 bcdDevice_initial_digits, bcdDevice_initial); 211 if (range_lo == range_hi) 212 sprintf(alias + strlen(alias), "%X", range_lo); 213 else if (range_lo > 0 || range_hi < max) { 214 if (range_lo > 0x9 || range_hi < 0xA) 215 sprintf(alias + strlen(alias), 216 "[%X-%X]", 217 range_lo, 218 range_hi); 219 else { 220 sprintf(alias + strlen(alias), 221 range_lo < 0x9 ? "[%X-9" : "[%X", 222 range_lo); 223 sprintf(alias + strlen(alias), 224 range_hi > 0xA ? "A-%X]" : "%X]", 225 range_hi); 226 } 227 } 228 if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1)) 229 strcat(alias, "*"); 230 231 ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS, 232 bDeviceClass); 233 ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS, 234 bDeviceSubClass); 235 ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL, 236 bDeviceProtocol); 237 ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS, 238 bInterfaceClass); 239 ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS, 240 bInterfaceSubClass); 241 ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL, 242 bInterfaceProtocol); 243 ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER, 244 bInterfaceNumber); 245 246 module_alias_printf(mod, true, "%s", alias); 247 } 248 249 /* Handles increment/decrement of BCD formatted integers */ 250 /* Returns the previous value, so it works like i++ or i-- */ 251 static unsigned int incbcd(unsigned int *bcd, 252 int inc, 253 unsigned char max, 254 size_t chars) 255 { 256 unsigned int init = *bcd, i, j; 257 unsigned long long c, dec = 0; 258 259 /* If bcd is not in BCD format, just increment */ 260 if (max > 0x9) { 261 *bcd += inc; 262 return init; 263 } 264 265 /* Convert BCD to Decimal */ 266 for (i=0 ; i < chars ; i++) { 267 c = (*bcd >> (i << 2)) & 0xf; 268 c = c > 9 ? 9 : c; /* force to bcd just in case */ 269 for (j=0 ; j < i ; j++) 270 c = c * 10; 271 dec += c; 272 } 273 274 /* Do our increment/decrement */ 275 dec += inc; 276 *bcd = 0; 277 278 /* Convert back to BCD */ 279 for (i=0 ; i < chars ; i++) { 280 for (c=1,j=0 ; j < i ; j++) 281 c = c * 10; 282 c = (dec / c) % 10; 283 *bcd += c << (i << 2); 284 } 285 return init; 286 } 287 288 static void do_usb_entry_multi(struct module *mod, void *symval) 289 { 290 unsigned int devlo, devhi; 291 unsigned char chi, clo, max; 292 int ndigits; 293 294 DEF_FIELD(symval, usb_device_id, match_flags); 295 DEF_FIELD(symval, usb_device_id, idVendor); 296 DEF_FIELD(symval, usb_device_id, idProduct); 297 DEF_FIELD(symval, usb_device_id, bcdDevice_lo); 298 DEF_FIELD(symval, usb_device_id, bcdDevice_hi); 299 DEF_FIELD(symval, usb_device_id, bDeviceClass); 300 DEF_FIELD(symval, usb_device_id, bInterfaceClass); 301 302 devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ? 303 bcdDevice_lo : 0x0U; 304 devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ? 305 bcdDevice_hi : ~0x0U; 306 307 /* Figure out if this entry is in bcd or hex format */ 308 max = 0x9; /* Default to decimal format */ 309 for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) { 310 clo = (devlo >> (ndigits << 2)) & 0xf; 311 chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf; 312 if (clo > max || chi > max) { 313 max = 0xf; 314 break; 315 } 316 } 317 318 /* 319 * Some modules (visor) have empty slots as placeholder for 320 * run-time specification that results in catch-all alias 321 */ 322 if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass)) 323 return; 324 325 /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */ 326 for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) { 327 clo = devlo & 0xf; 328 chi = devhi & 0xf; 329 if (chi > max) /* If we are in bcd mode, truncate if necessary */ 330 chi = max; 331 devlo >>= 4; 332 devhi >>= 4; 333 334 if (devlo == devhi || !ndigits) { 335 do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod); 336 break; 337 } 338 339 if (clo > 0x0) 340 do_usb_entry(symval, 341 incbcd(&devlo, 1, max, 342 sizeof(bcdDevice_lo) * 2), 343 ndigits, clo, max, max, mod); 344 345 if (chi < max) 346 do_usb_entry(symval, 347 incbcd(&devhi, -1, max, 348 sizeof(bcdDevice_lo) * 2), 349 ndigits, 0x0, chi, max, mod); 350 } 351 } 352 353 static void do_of_entry(struct module *mod, void *symval) 354 { 355 char alias[500]; 356 int len; 357 char *tmp; 358 359 DEF_FIELD_ADDR(symval, of_device_id, name); 360 DEF_FIELD_ADDR(symval, of_device_id, type); 361 DEF_FIELD_ADDR(symval, of_device_id, compatible); 362 363 len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*", 364 (*type)[0] ? *type : "*"); 365 366 if ((*compatible)[0]) 367 sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "", 368 *compatible); 369 370 /* Replace all whitespace with underscores */ 371 for (tmp = alias; tmp && *tmp; tmp++) 372 if (isspace(*tmp)) 373 *tmp = '_'; 374 375 module_alias_printf(mod, false, "%s", alias); 376 module_alias_printf(mod, false, "%sC*", alias); 377 } 378 379 /* Looks like: hid:bNvNpN */ 380 static void do_hid_entry(struct module *mod, void *symval) 381 { 382 char alias[256] = {}; 383 384 DEF_FIELD(symval, hid_device_id, bus); 385 DEF_FIELD(symval, hid_device_id, group); 386 DEF_FIELD(symval, hid_device_id, vendor); 387 DEF_FIELD(symval, hid_device_id, product); 388 389 ADD(alias, "b", bus != HID_BUS_ANY, bus); 390 ADD(alias, "g", group != HID_GROUP_ANY, group); 391 ADD(alias, "v", vendor != HID_ANY_ID, vendor); 392 ADD(alias, "p", product != HID_ANY_ID, product); 393 394 module_alias_printf(mod, false, "hid:%s", alias); 395 } 396 397 /* Looks like: ieee1394:venNmoNspNverN */ 398 static void do_ieee1394_entry(struct module *mod, void *symval) 399 { 400 char alias[256] = {}; 401 402 DEF_FIELD(symval, ieee1394_device_id, match_flags); 403 DEF_FIELD(symval, ieee1394_device_id, vendor_id); 404 DEF_FIELD(symval, ieee1394_device_id, model_id); 405 DEF_FIELD(symval, ieee1394_device_id, specifier_id); 406 DEF_FIELD(symval, ieee1394_device_id, version); 407 408 ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID, 409 vendor_id); 410 ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID, 411 model_id); 412 ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID, 413 specifier_id); 414 ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION, 415 version); 416 417 module_alias_printf(mod, true, "ieee1394:%s", alias); 418 } 419 420 /* Looks like: pci:vNdNsvNsdNbcNscNiN or <prefix>_pci:vNdNsvNsdNbcNscNiN. */ 421 static void do_pci_entry(struct module *mod, void *symval) 422 { 423 char alias[256]; 424 /* Class field can be divided into these three. */ 425 unsigned char baseclass, subclass, interface, 426 baseclass_mask, subclass_mask, interface_mask; 427 428 DEF_FIELD(symval, pci_device_id, vendor); 429 DEF_FIELD(symval, pci_device_id, device); 430 DEF_FIELD(symval, pci_device_id, subvendor); 431 DEF_FIELD(symval, pci_device_id, subdevice); 432 DEF_FIELD(symval, pci_device_id, class); 433 DEF_FIELD(symval, pci_device_id, class_mask); 434 DEF_FIELD(symval, pci_device_id, override_only); 435 436 switch (override_only) { 437 case 0: 438 strcpy(alias, "pci:"); 439 break; 440 case PCI_ID_F_VFIO_DRIVER_OVERRIDE: 441 strcpy(alias, "vfio_pci:"); 442 break; 443 default: 444 warn("Unknown PCI driver_override alias %08X\n", 445 override_only); 446 } 447 448 ADD(alias, "v", vendor != PCI_ANY_ID, vendor); 449 ADD(alias, "d", device != PCI_ANY_ID, device); 450 ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor); 451 ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice); 452 453 baseclass = (class) >> 16; 454 baseclass_mask = (class_mask) >> 16; 455 subclass = (class) >> 8; 456 subclass_mask = (class_mask) >> 8; 457 interface = class; 458 interface_mask = class_mask; 459 460 if ((baseclass_mask != 0 && baseclass_mask != 0xFF) 461 || (subclass_mask != 0 && subclass_mask != 0xFF) 462 || (interface_mask != 0 && interface_mask != 0xFF)) { 463 warn("Can't handle masks in %s:%04X\n", 464 mod->name, class_mask); 465 return; 466 } 467 468 ADD(alias, "bc", baseclass_mask == 0xFF, baseclass); 469 ADD(alias, "sc", subclass_mask == 0xFF, subclass); 470 ADD(alias, "i", interface_mask == 0xFF, interface); 471 472 module_alias_printf(mod, true, "%s", alias); 473 } 474 475 /* looks like: "ccw:tNmNdtNdmN" */ 476 static void do_ccw_entry(struct module *mod, void *symval) 477 { 478 char alias[256] = {}; 479 480 DEF_FIELD(symval, ccw_device_id, match_flags); 481 DEF_FIELD(symval, ccw_device_id, cu_type); 482 DEF_FIELD(symval, ccw_device_id, cu_model); 483 DEF_FIELD(symval, ccw_device_id, dev_type); 484 DEF_FIELD(symval, ccw_device_id, dev_model); 485 486 ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE, 487 cu_type); 488 ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL, 489 cu_model); 490 ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE, 491 dev_type); 492 ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL, 493 dev_model); 494 495 module_alias_printf(mod, true, "ccw:%s", alias); 496 } 497 498 /* looks like: "ap:tN" */ 499 static void do_ap_entry(struct module *mod, void *symval) 500 { 501 DEF_FIELD(symval, ap_device_id, dev_type); 502 503 module_alias_printf(mod, false, "ap:t%02X*", dev_type); 504 } 505 506 /* looks like: "css:tN" */ 507 static void do_css_entry(struct module *mod, void *symval) 508 { 509 DEF_FIELD(symval, css_device_id, type); 510 511 module_alias_printf(mod, false, "css:t%01X", type); 512 } 513 514 /* Looks like: "serio:tyNprNidNexN" */ 515 static void do_serio_entry(struct module *mod, void *symval) 516 { 517 char alias[256] = {}; 518 519 DEF_FIELD(symval, serio_device_id, type); 520 DEF_FIELD(symval, serio_device_id, proto); 521 DEF_FIELD(symval, serio_device_id, id); 522 DEF_FIELD(symval, serio_device_id, extra); 523 524 ADD(alias, "ty", type != SERIO_ANY, type); 525 ADD(alias, "pr", proto != SERIO_ANY, proto); 526 ADD(alias, "id", id != SERIO_ANY, id); 527 ADD(alias, "ex", extra != SERIO_ANY, extra); 528 529 module_alias_printf(mod, true, "serio:%s", alias); 530 } 531 532 /* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or 533 * "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if) 534 * 535 * NOTE: Each driver should use one of the following : _HID, _CIDs 536 * or _CLS. Also, bb, ss, and pp can be substituted with ?? 537 * as don't care byte. 538 */ 539 static void do_acpi_entry(struct module *mod, void *symval) 540 { 541 DEF_FIELD_ADDR(symval, acpi_device_id, id); 542 DEF_FIELD(symval, acpi_device_id, cls); 543 DEF_FIELD(symval, acpi_device_id, cls_msk); 544 545 if ((*id)[0]) 546 module_alias_printf(mod, false, "acpi*:%s:*", *id); 547 else { 548 char alias[256]; 549 int i, byte_shift, cnt = 0; 550 unsigned int msk; 551 552 for (i = 1; i <= 3; i++) { 553 byte_shift = 8 * (3-i); 554 msk = (cls_msk >> byte_shift) & 0xFF; 555 if (msk) 556 sprintf(&alias[cnt], "%02x", 557 (cls >> byte_shift) & 0xFF); 558 else 559 sprintf(&alias[cnt], "??"); 560 cnt += 2; 561 } 562 module_alias_printf(mod, false, "acpi*:%s:*", alias); 563 } 564 } 565 566 /* looks like: "pnp:dD" */ 567 static void do_pnp_device_entry(struct module *mod, void *symval) 568 { 569 DEF_FIELD_ADDR(symval, pnp_device_id, id); 570 char acpi_id[sizeof(*id)]; 571 572 /* fix broken pnp bus lowercasing */ 573 for (unsigned int i = 0; i < sizeof(acpi_id); i++) 574 acpi_id[i] = toupper((*id)[i]); 575 module_alias_printf(mod, false, "pnp:d%s*", *id); 576 module_alias_printf(mod, false, "acpi*:%s:*", acpi_id); 577 } 578 579 /* looks like: "pnp:dD" for every device of the card */ 580 static void do_pnp_card_entry(struct module *mod, void *symval) 581 { 582 DEF_FIELD_ADDR(symval, pnp_card_device_id, devs); 583 584 for (unsigned int i = 0; i < PNP_MAX_DEVICES; i++) { 585 const char *id = (char *)(*devs)[i].id; 586 char acpi_id[PNP_ID_LEN]; 587 588 if (!id[0]) 589 break; 590 591 /* fix broken pnp bus lowercasing */ 592 for (unsigned int j = 0; j < sizeof(acpi_id); j++) 593 acpi_id[j] = toupper(id[j]); 594 595 /* add an individual alias for every device entry */ 596 module_alias_printf(mod, false, "pnp:d%s*", id); 597 module_alias_printf(mod, false, "acpi*:%s:*", acpi_id); 598 } 599 } 600 601 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */ 602 static void do_pcmcia_entry(struct module *mod, void *symval) 603 { 604 char alias[256] = {}; 605 606 DEF_FIELD(symval, pcmcia_device_id, match_flags); 607 DEF_FIELD(symval, pcmcia_device_id, manf_id); 608 DEF_FIELD(symval, pcmcia_device_id, card_id); 609 DEF_FIELD(symval, pcmcia_device_id, func_id); 610 DEF_FIELD(symval, pcmcia_device_id, function); 611 DEF_FIELD(symval, pcmcia_device_id, device_no); 612 DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash); 613 614 ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID, 615 manf_id); 616 ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID, 617 card_id); 618 ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID, 619 func_id); 620 ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION, 621 function); 622 ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO, 623 device_no); 624 ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, 625 get_unaligned_native(*prod_id_hash + 0)); 626 ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, 627 get_unaligned_native(*prod_id_hash + 1)); 628 ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, 629 get_unaligned_native(*prod_id_hash + 2)); 630 ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, 631 get_unaligned_native(*prod_id_hash + 3)); 632 633 module_alias_printf(mod, true, "pcmcia:%s", alias); 634 } 635 636 static void do_vio_entry(struct module *mod, void *symval) 637 { 638 char alias[256]; 639 char *tmp; 640 DEF_FIELD_ADDR(symval, vio_device_id, type); 641 DEF_FIELD_ADDR(symval, vio_device_id, compat); 642 643 sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*", 644 (*compat)[0] ? *compat : "*"); 645 646 /* Replace all whitespace with underscores */ 647 for (tmp = alias; tmp && *tmp; tmp++) 648 if (isspace (*tmp)) 649 *tmp = '_'; 650 651 module_alias_printf(mod, true, "%s", alias); 652 } 653 654 static void do_input(char *alias, 655 kernel_ulong_t *arr, unsigned int min, unsigned int max) 656 { 657 unsigned int i; 658 659 for (i = min; i <= max; i++) 660 if (get_unaligned_native(arr + i / BITS_PER_LONG) & 661 (1ULL << (i % BITS_PER_LONG))) 662 sprintf(alias + strlen(alias), "%X,*", i); 663 } 664 665 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */ 666 static void do_input_entry(struct module *mod, void *symval) 667 { 668 char alias[256] = {}; 669 670 DEF_FIELD(symval, input_device_id, flags); 671 DEF_FIELD(symval, input_device_id, bustype); 672 DEF_FIELD(symval, input_device_id, vendor); 673 DEF_FIELD(symval, input_device_id, product); 674 DEF_FIELD(symval, input_device_id, version); 675 DEF_FIELD_ADDR(symval, input_device_id, evbit); 676 DEF_FIELD_ADDR(symval, input_device_id, keybit); 677 DEF_FIELD_ADDR(symval, input_device_id, relbit); 678 DEF_FIELD_ADDR(symval, input_device_id, absbit); 679 DEF_FIELD_ADDR(symval, input_device_id, mscbit); 680 DEF_FIELD_ADDR(symval, input_device_id, ledbit); 681 DEF_FIELD_ADDR(symval, input_device_id, sndbit); 682 DEF_FIELD_ADDR(symval, input_device_id, ffbit); 683 DEF_FIELD_ADDR(symval, input_device_id, swbit); 684 685 ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype); 686 ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor); 687 ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product); 688 ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version); 689 690 sprintf(alias + strlen(alias), "-e*"); 691 if (flags & INPUT_DEVICE_ID_MATCH_EVBIT) 692 do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX); 693 sprintf(alias + strlen(alias), "k*"); 694 if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT) 695 do_input(alias, *keybit, 696 INPUT_DEVICE_ID_KEY_MIN_INTERESTING, 697 INPUT_DEVICE_ID_KEY_MAX); 698 sprintf(alias + strlen(alias), "r*"); 699 if (flags & INPUT_DEVICE_ID_MATCH_RELBIT) 700 do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX); 701 sprintf(alias + strlen(alias), "a*"); 702 if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT) 703 do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX); 704 sprintf(alias + strlen(alias), "m*"); 705 if (flags & INPUT_DEVICE_ID_MATCH_MSCIT) 706 do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX); 707 sprintf(alias + strlen(alias), "l*"); 708 if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT) 709 do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX); 710 sprintf(alias + strlen(alias), "s*"); 711 if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT) 712 do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX); 713 sprintf(alias + strlen(alias), "f*"); 714 if (flags & INPUT_DEVICE_ID_MATCH_FFBIT) 715 do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX); 716 sprintf(alias + strlen(alias), "w*"); 717 if (flags & INPUT_DEVICE_ID_MATCH_SWBIT) 718 do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX); 719 720 module_alias_printf(mod, false, "input:%s", alias); 721 } 722 723 static void do_eisa_entry(struct module *mod, void *symval) 724 { 725 DEF_FIELD_ADDR(symval, eisa_device_id, sig); 726 module_alias_printf(mod, false, EISA_DEVICE_MODALIAS_FMT "*", *sig); 727 } 728 729 /* Looks like: parisc:tNhvNrevNsvN */ 730 static void do_parisc_entry(struct module *mod, void *symval) 731 { 732 char alias[256] = {}; 733 734 DEF_FIELD(symval, parisc_device_id, hw_type); 735 DEF_FIELD(symval, parisc_device_id, hversion); 736 DEF_FIELD(symval, parisc_device_id, hversion_rev); 737 DEF_FIELD(symval, parisc_device_id, sversion); 738 739 ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type); 740 ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion); 741 ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev); 742 ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion); 743 744 module_alias_printf(mod, true, "parisc:%s", alias); 745 } 746 747 /* Looks like: sdio:cNvNdN. */ 748 static void do_sdio_entry(struct module *mod, void *symval) 749 { 750 char alias[256] = {}; 751 752 DEF_FIELD(symval, sdio_device_id, class); 753 DEF_FIELD(symval, sdio_device_id, vendor); 754 DEF_FIELD(symval, sdio_device_id, device); 755 756 ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class); 757 ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor); 758 ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device); 759 760 module_alias_printf(mod, true, "sdio:%s", alias); 761 } 762 763 /* Looks like: ssb:vNidNrevN. */ 764 static void do_ssb_entry(struct module *mod, void *symval) 765 { 766 char alias[256] = {}; 767 768 DEF_FIELD(symval, ssb_device_id, vendor); 769 DEF_FIELD(symval, ssb_device_id, coreid); 770 DEF_FIELD(symval, ssb_device_id, revision); 771 772 ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor); 773 ADD(alias, "id", coreid != SSB_ANY_ID, coreid); 774 ADD(alias, "rev", revision != SSB_ANY_REV, revision); 775 776 module_alias_printf(mod, true, "ssb:%s", alias); 777 } 778 779 /* Looks like: bcma:mNidNrevNclN. */ 780 static void do_bcma_entry(struct module *mod, void *symval) 781 { 782 char alias[256] = {}; 783 784 DEF_FIELD(symval, bcma_device_id, manuf); 785 DEF_FIELD(symval, bcma_device_id, id); 786 DEF_FIELD(symval, bcma_device_id, rev); 787 DEF_FIELD(symval, bcma_device_id, class); 788 789 ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf); 790 ADD(alias, "id", id != BCMA_ANY_ID, id); 791 ADD(alias, "rev", rev != BCMA_ANY_REV, rev); 792 ADD(alias, "cl", class != BCMA_ANY_CLASS, class); 793 794 module_alias_printf(mod, true, "bcma:%s", alias); 795 } 796 797 /* Looks like: virtio:dNvN */ 798 static void do_virtio_entry(struct module *mod, void *symval) 799 { 800 char alias[256] = {}; 801 802 DEF_FIELD(symval, virtio_device_id, device); 803 DEF_FIELD(symval, virtio_device_id, vendor); 804 805 ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device); 806 ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor); 807 808 module_alias_printf(mod, true, "virtio:%s", alias); 809 } 810 811 /* 812 * Looks like: vmbus:guid 813 * Each byte of the guid will be represented by two hex characters 814 * in the name. 815 */ 816 static void do_vmbus_entry(struct module *mod, void *symval) 817 { 818 DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid); 819 char guid_name[sizeof(*guid) * 2 + 1]; 820 821 for (int i = 0; i < sizeof(*guid); i++) 822 sprintf(&guid_name[i * 2], "%02x", guid->b[i]); 823 824 module_alias_printf(mod, false, "vmbus:%s", guid_name); 825 } 826 827 /* Looks like: rpmsg:S */ 828 static void do_rpmsg_entry(struct module *mod, void *symval) 829 { 830 DEF_FIELD_ADDR(symval, rpmsg_device_id, name); 831 832 module_alias_printf(mod, false, RPMSG_DEVICE_MODALIAS_FMT, *name); 833 } 834 835 /* Looks like: i2c:S */ 836 static void do_i2c_entry(struct module *mod, void *symval) 837 { 838 DEF_FIELD_ADDR(symval, i2c_device_id, name); 839 840 module_alias_printf(mod, false, I2C_MODULE_PREFIX "%s", *name); 841 } 842 843 static void do_i3c_entry(struct module *mod, void *symval) 844 { 845 char alias[256] = {}; 846 847 DEF_FIELD(symval, i3c_device_id, match_flags); 848 DEF_FIELD(symval, i3c_device_id, dcr); 849 DEF_FIELD(symval, i3c_device_id, manuf_id); 850 DEF_FIELD(symval, i3c_device_id, part_id); 851 DEF_FIELD(symval, i3c_device_id, extra_info); 852 853 ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr); 854 ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id); 855 ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id); 856 ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info); 857 858 module_alias_printf(mod, false, "i3c:%s", alias); 859 } 860 861 static void do_slim_entry(struct module *mod, void *symval) 862 { 863 DEF_FIELD(symval, slim_device_id, manf_id); 864 DEF_FIELD(symval, slim_device_id, prod_code); 865 866 module_alias_printf(mod, false, "slim:%x:%x:*", manf_id, prod_code); 867 } 868 869 /* Looks like: spi:S */ 870 static void do_spi_entry(struct module *mod, void *symval) 871 { 872 DEF_FIELD_ADDR(symval, spi_device_id, name); 873 874 module_alias_printf(mod, false, SPI_MODULE_PREFIX "%s", *name); 875 } 876 877 static const struct dmifield { 878 const char *prefix; 879 int field; 880 } dmi_fields[] = { 881 { "bvn", DMI_BIOS_VENDOR }, 882 { "bvr", DMI_BIOS_VERSION }, 883 { "bd", DMI_BIOS_DATE }, 884 { "br", DMI_BIOS_RELEASE }, 885 { "efr", DMI_EC_FIRMWARE_RELEASE }, 886 { "svn", DMI_SYS_VENDOR }, 887 { "pn", DMI_PRODUCT_NAME }, 888 { "pvr", DMI_PRODUCT_VERSION }, 889 { "rvn", DMI_BOARD_VENDOR }, 890 { "rn", DMI_BOARD_NAME }, 891 { "rvr", DMI_BOARD_VERSION }, 892 { "cvn", DMI_CHASSIS_VENDOR }, 893 { "ct", DMI_CHASSIS_TYPE }, 894 { "cvr", DMI_CHASSIS_VERSION }, 895 { NULL, DMI_NONE } 896 }; 897 898 static void dmi_ascii_filter(char *d, const char *s) 899 { 900 /* Filter out characters we don't want to see in the modalias string */ 901 for (; *s; s++) 902 if (*s > ' ' && *s < 127 && *s != ':') 903 *(d++) = *s; 904 905 *d = 0; 906 } 907 908 909 static void do_dmi_entry(struct module *mod, void *symval) 910 { 911 char alias[256] = {}; 912 int i, j; 913 DEF_FIELD_ADDR(symval, dmi_system_id, matches); 914 915 for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) { 916 for (j = 0; j < 4; j++) { 917 if ((*matches)[j].slot && 918 (*matches)[j].slot == dmi_fields[i].field) { 919 sprintf(alias + strlen(alias), ":%s*", 920 dmi_fields[i].prefix); 921 dmi_ascii_filter(alias + strlen(alias), 922 (*matches)[j].substr); 923 strcat(alias, "*"); 924 } 925 } 926 } 927 928 module_alias_printf(mod, false, "dmi*%s:", alias); 929 } 930 931 static void do_platform_entry(struct module *mod, void *symval) 932 { 933 DEF_FIELD_ADDR(symval, platform_device_id, name); 934 935 module_alias_printf(mod, false, PLATFORM_MODULE_PREFIX "%s", *name); 936 } 937 938 static void do_mdio_entry(struct module *mod, void *symval) 939 { 940 char id[33]; 941 int i; 942 DEF_FIELD(symval, mdio_device_id, phy_id); 943 DEF_FIELD(symval, mdio_device_id, phy_id_mask); 944 945 for (i = 0; i < 32; i++) { 946 if (!((phy_id_mask >> (31-i)) & 1)) 947 id[i] = '?'; 948 else if ((phy_id >> (31-i)) & 1) 949 id[i] = '1'; 950 else 951 id[i] = '0'; 952 } 953 954 /* Terminate the string */ 955 id[32] = '\0'; 956 957 module_alias_printf(mod, false, MDIO_MODULE_PREFIX "%s", id); 958 } 959 960 /* Looks like: zorro:iN. */ 961 static void do_zorro_entry(struct module *mod, void *symval) 962 { 963 char alias[256] = {}; 964 DEF_FIELD(symval, zorro_device_id, id); 965 966 ADD(alias, "i", id != ZORRO_WILDCARD, id); 967 968 module_alias_printf(mod, false, "zorro:%s", alias); 969 } 970 971 /* looks like: "pnp:dD" */ 972 static void do_isapnp_entry(struct module *mod, void *symval) 973 { 974 DEF_FIELD(symval, isapnp_device_id, vendor); 975 DEF_FIELD(symval, isapnp_device_id, function); 976 module_alias_printf(mod, false, "pnp:d%c%c%c%x%x%x%x*", 977 'A' + ((vendor >> 2) & 0x3f) - 1, 978 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, 979 'A' + ((vendor >> 8) & 0x1f) - 1, 980 (function >> 4) & 0x0f, function & 0x0f, 981 (function >> 12) & 0x0f, (function >> 8) & 0x0f); 982 } 983 984 /* Looks like: "ipack:fNvNdN". */ 985 static void do_ipack_entry(struct module *mod, void *symval) 986 { 987 char alias[256] = {}; 988 DEF_FIELD(symval, ipack_device_id, format); 989 DEF_FIELD(symval, ipack_device_id, vendor); 990 DEF_FIELD(symval, ipack_device_id, device); 991 992 ADD(alias, "f", format != IPACK_ANY_FORMAT, format); 993 ADD(alias, "v", vendor != IPACK_ANY_ID, vendor); 994 ADD(alias, "d", device != IPACK_ANY_ID, device); 995 996 module_alias_printf(mod, true, "ipack:%s", alias); 997 } 998 999 /* 1000 * Append a match expression for a single masked hex digit. 1001 * outp points to a pointer to the character at which to append. 1002 * *outp is updated on return to point just after the appended text, 1003 * to facilitate further appending. 1004 */ 1005 static void append_nibble_mask(char **outp, 1006 unsigned int nibble, unsigned int mask) 1007 { 1008 char *p = *outp; 1009 unsigned int i; 1010 1011 switch (mask) { 1012 case 0: 1013 *p++ = '?'; 1014 break; 1015 1016 case 0xf: 1017 p += sprintf(p, "%X", nibble); 1018 break; 1019 1020 default: 1021 /* 1022 * Dumbly emit a match pattern for all possible matching 1023 * digits. This could be improved in some cases using ranges, 1024 * but it has the advantage of being trivially correct, and is 1025 * often optimal. 1026 */ 1027 *p++ = '['; 1028 for (i = 0; i < 0x10; i++) 1029 if ((i & mask) == nibble) 1030 p += sprintf(p, "%X", i); 1031 *p++ = ']'; 1032 } 1033 1034 /* Ensure that the string remains NUL-terminated: */ 1035 *p = '\0'; 1036 1037 /* Advance the caller's end-of-string pointer: */ 1038 *outp = p; 1039 } 1040 1041 /* 1042 * looks like: "amba:dN" 1043 * 1044 * N is exactly 8 digits, where each is an upper-case hex digit, or 1045 * a ? or [] pattern matching exactly one digit. 1046 */ 1047 static void do_amba_entry(struct module *mod, void *symval) 1048 { 1049 char alias[256]; 1050 unsigned int digit; 1051 char *p = alias; 1052 DEF_FIELD(symval, amba_id, id); 1053 DEF_FIELD(symval, amba_id, mask); 1054 1055 if ((id & mask) != id) 1056 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: id=0x%08X, mask=0x%08X. Please fix this driver.\n", 1057 mod->name, id, mask); 1058 1059 for (digit = 0; digit < 8; digit++) 1060 append_nibble_mask(&p, 1061 (id >> (4 * (7 - digit))) & 0xf, 1062 (mask >> (4 * (7 - digit))) & 0xf); 1063 1064 module_alias_printf(mod, false, "amba:d%s", alias); 1065 } 1066 1067 /* 1068 * looks like: "mipscdmm:tN" 1069 * 1070 * N is exactly 2 digits, where each is an upper-case hex digit, or 1071 * a ? or [] pattern matching exactly one digit. 1072 */ 1073 static void do_mips_cdmm_entry(struct module *mod, void *symval) 1074 { 1075 DEF_FIELD(symval, mips_cdmm_device_id, type); 1076 1077 module_alias_printf(mod, false, "mipscdmm:t%02X*", type); 1078 } 1079 1080 /* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,* 1081 * All fields are numbers. It would be nicer to use strings for vendor 1082 * and feature, but getting those out of the build system here is too 1083 * complicated. 1084 */ 1085 1086 static void do_x86cpu_entry(struct module *mod, void *symval) 1087 { 1088 char alias[256] = {}; 1089 1090 DEF_FIELD(symval, x86_cpu_id, feature); 1091 DEF_FIELD(symval, x86_cpu_id, family); 1092 DEF_FIELD(symval, x86_cpu_id, model); 1093 DEF_FIELD(symval, x86_cpu_id, vendor); 1094 1095 ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor); 1096 ADD(alias, "fam", family != X86_FAMILY_ANY, family); 1097 ADD(alias, "mod", model != X86_MODEL_ANY, model); 1098 strcat(alias, ":feature:*"); 1099 if (feature != X86_FEATURE_ANY) 1100 sprintf(alias + strlen(alias), "%04X*", feature); 1101 1102 module_alias_printf(mod, false, "cpu:type:x86,%s", alias); 1103 } 1104 1105 /* LOOKS like cpu:type:*:feature:*FEAT* */ 1106 static void do_cpu_entry(struct module *mod, void *symval) 1107 { 1108 DEF_FIELD(symval, cpu_feature, feature); 1109 1110 module_alias_printf(mod, false, "cpu:type:*:feature:*%04X*", feature); 1111 } 1112 1113 /* Looks like: mei:S:uuid:N:* */ 1114 static void do_mei_entry(struct module *mod, void *symval) 1115 { 1116 char alias[256] = {}; 1117 1118 DEF_FIELD_ADDR(symval, mei_cl_device_id, name); 1119 DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid); 1120 DEF_FIELD(symval, mei_cl_device_id, version); 1121 1122 add_uuid(alias, *uuid); 1123 ADD(alias, ":", version != MEI_CL_VERSION_ANY, version); 1124 1125 module_alias_printf(mod, false, MEI_CL_MODULE_PREFIX "%s:%s:*", 1126 (*name)[0] ? *name : "*", alias); 1127 } 1128 1129 /* Looks like: rapidio:vNdNavNadN */ 1130 static void do_rio_entry(struct module *mod, void *symval) 1131 { 1132 char alias[256] = {}; 1133 1134 DEF_FIELD(symval, rio_device_id, did); 1135 DEF_FIELD(symval, rio_device_id, vid); 1136 DEF_FIELD(symval, rio_device_id, asm_did); 1137 DEF_FIELD(symval, rio_device_id, asm_vid); 1138 1139 ADD(alias, "v", vid != RIO_ANY_ID, vid); 1140 ADD(alias, "d", did != RIO_ANY_ID, did); 1141 ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid); 1142 ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did); 1143 1144 module_alias_printf(mod, true, "rapidio:%s", alias); 1145 } 1146 1147 /* Looks like: ulpi:vNpN */ 1148 static void do_ulpi_entry(struct module *mod, void *symval) 1149 { 1150 DEF_FIELD(symval, ulpi_device_id, vendor); 1151 DEF_FIELD(symval, ulpi_device_id, product); 1152 1153 module_alias_printf(mod, false, "ulpi:v%04xp%04x", vendor, product); 1154 } 1155 1156 /* Looks like: hdaudio:vNrNaN */ 1157 static void do_hda_entry(struct module *mod, void *symval) 1158 { 1159 char alias[256] = {}; 1160 1161 DEF_FIELD(symval, hda_device_id, vendor_id); 1162 DEF_FIELD(symval, hda_device_id, rev_id); 1163 DEF_FIELD(symval, hda_device_id, api_version); 1164 1165 ADD(alias, "v", vendor_id != 0, vendor_id); 1166 ADD(alias, "r", rev_id != 0, rev_id); 1167 ADD(alias, "a", api_version != 0, api_version); 1168 1169 module_alias_printf(mod, true, "hdaudio:%s", alias); 1170 } 1171 1172 /* Looks like: sdw:mNpNvNcN */ 1173 static void do_sdw_entry(struct module *mod, void *symval) 1174 { 1175 char alias[256] = {}; 1176 1177 DEF_FIELD(symval, sdw_device_id, mfg_id); 1178 DEF_FIELD(symval, sdw_device_id, part_id); 1179 DEF_FIELD(symval, sdw_device_id, sdw_version); 1180 DEF_FIELD(symval, sdw_device_id, class_id); 1181 1182 ADD(alias, "m", mfg_id != 0, mfg_id); 1183 ADD(alias, "p", part_id != 0, part_id); 1184 ADD(alias, "v", sdw_version != 0, sdw_version); 1185 ADD(alias, "c", class_id != 0, class_id); 1186 1187 module_alias_printf(mod, true, "sdw:%s", alias); 1188 } 1189 1190 /* Looks like: fsl-mc:vNdN */ 1191 static void do_fsl_mc_entry(struct module *mod, void *symval) 1192 { 1193 DEF_FIELD(symval, fsl_mc_device_id, vendor); 1194 DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type); 1195 1196 module_alias_printf(mod, false, "fsl-mc:v%08Xd%s", vendor, *obj_type); 1197 } 1198 1199 /* Looks like: tbsvc:kSpNvNrN */ 1200 static void do_tbsvc_entry(struct module *mod, void *symval) 1201 { 1202 char alias[256] = {}; 1203 1204 DEF_FIELD(symval, tb_service_id, match_flags); 1205 DEF_FIELD_ADDR(symval, tb_service_id, protocol_key); 1206 DEF_FIELD(symval, tb_service_id, protocol_id); 1207 DEF_FIELD(symval, tb_service_id, protocol_version); 1208 DEF_FIELD(symval, tb_service_id, protocol_revision); 1209 1210 if (match_flags & TBSVC_MATCH_PROTOCOL_KEY) 1211 sprintf(alias + strlen(alias), "k%s", *protocol_key); 1212 else 1213 strcat(alias + strlen(alias), "k*"); 1214 ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id); 1215 ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION, 1216 protocol_version); 1217 ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION, 1218 protocol_revision); 1219 1220 module_alias_printf(mod, true, "tbsvc:%s", alias); 1221 } 1222 1223 /* Looks like: typec:idN */ 1224 static void do_typec_entry(struct module *mod, void *symval) 1225 { 1226 DEF_FIELD(symval, typec_device_id, svid); 1227 1228 module_alias_printf(mod, false, "typec:id%04X", svid); 1229 } 1230 1231 /* Looks like: tee:uuid */ 1232 static void do_tee_entry(struct module *mod, void *symval) 1233 { 1234 DEF_FIELD_ADDR(symval, tee_client_device_id, uuid); 1235 1236 module_alias_printf(mod, true, 1237 "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", 1238 uuid->b[0], uuid->b[1], uuid->b[2], uuid->b[3], uuid->b[4], 1239 uuid->b[5], uuid->b[6], uuid->b[7], uuid->b[8], uuid->b[9], 1240 uuid->b[10], uuid->b[11], uuid->b[12], uuid->b[13], uuid->b[14], 1241 uuid->b[15]); 1242 } 1243 1244 /* Looks like: wmi:guid */ 1245 static void do_wmi_entry(struct module *mod, void *symval) 1246 { 1247 DEF_FIELD_ADDR(symval, wmi_device_id, guid_string); 1248 1249 if (strlen(*guid_string) != UUID_STRING_LEN) { 1250 warn("Invalid WMI device id 'wmi:%s' in '%s'\n", 1251 *guid_string, mod->name); 1252 return; 1253 } 1254 1255 module_alias_printf(mod, false, WMI_MODULE_PREFIX "%s", *guid_string); 1256 } 1257 1258 /* Looks like: mhi:S */ 1259 static void do_mhi_entry(struct module *mod, void *symval) 1260 { 1261 DEF_FIELD_ADDR(symval, mhi_device_id, chan); 1262 module_alias_printf(mod, false, MHI_DEVICE_MODALIAS_FMT, *chan); 1263 } 1264 1265 /* Looks like: mhi_ep:S */ 1266 static void do_mhi_ep_entry(struct module *mod, void *symval) 1267 { 1268 DEF_FIELD_ADDR(symval, mhi_device_id, chan); 1269 1270 module_alias_printf(mod, false, MHI_EP_DEVICE_MODALIAS_FMT, *chan); 1271 } 1272 1273 /* Looks like: ishtp:{guid} */ 1274 static void do_ishtp_entry(struct module *mod, void *symval) 1275 { 1276 char alias[256] = {}; 1277 DEF_FIELD_ADDR(symval, ishtp_device_id, guid); 1278 1279 add_guid(alias, *guid); 1280 1281 module_alias_printf(mod, false, ISHTP_MODULE_PREFIX "{%s}", alias); 1282 } 1283 1284 static void do_auxiliary_entry(struct module *mod, void *symval) 1285 { 1286 DEF_FIELD_ADDR(symval, auxiliary_device_id, name); 1287 1288 module_alias_printf(mod, false, AUXILIARY_MODULE_PREFIX "%s", *name); 1289 } 1290 1291 /* 1292 * Looks like: ssam:dNcNtNiNfN 1293 * 1294 * N is exactly 2 digits, where each is an upper-case hex digit. 1295 */ 1296 static void do_ssam_entry(struct module *mod, void *symval) 1297 { 1298 char alias[256] = {}; 1299 1300 DEF_FIELD(symval, ssam_device_id, match_flags); 1301 DEF_FIELD(symval, ssam_device_id, domain); 1302 DEF_FIELD(symval, ssam_device_id, category); 1303 DEF_FIELD(symval, ssam_device_id, target); 1304 DEF_FIELD(symval, ssam_device_id, instance); 1305 DEF_FIELD(symval, ssam_device_id, function); 1306 1307 ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target); 1308 ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance); 1309 ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function); 1310 1311 module_alias_printf(mod, false, "ssam:d%02Xc%02X%s", 1312 domain, category, alias); 1313 } 1314 1315 /* Looks like: dfl:tNfN */ 1316 static void do_dfl_entry(struct module *mod, void *symval) 1317 { 1318 DEF_FIELD(symval, dfl_device_id, type); 1319 DEF_FIELD(symval, dfl_device_id, feature_id); 1320 1321 module_alias_printf(mod, true, "dfl:t%04Xf%04X", type, feature_id); 1322 } 1323 1324 /* Looks like: cdx:vNdN */ 1325 static void do_cdx_entry(struct module *mod, void *symval) 1326 { 1327 char alias[256]; 1328 1329 DEF_FIELD(symval, cdx_device_id, vendor); 1330 DEF_FIELD(symval, cdx_device_id, device); 1331 DEF_FIELD(symval, cdx_device_id, subvendor); 1332 DEF_FIELD(symval, cdx_device_id, subdevice); 1333 DEF_FIELD(symval, cdx_device_id, class); 1334 DEF_FIELD(symval, cdx_device_id, class_mask); 1335 DEF_FIELD(symval, cdx_device_id, override_only); 1336 1337 switch (override_only) { 1338 case 0: 1339 strcpy(alias, "cdx:"); 1340 break; 1341 case CDX_ID_F_VFIO_DRIVER_OVERRIDE: 1342 strcpy(alias, "vfio_cdx:"); 1343 break; 1344 default: 1345 warn("Unknown CDX driver_override alias %08X\n", 1346 override_only); 1347 return; 1348 } 1349 1350 ADD(alias, "v", vendor != CDX_ANY_ID, vendor); 1351 ADD(alias, "d", device != CDX_ANY_ID, device); 1352 ADD(alias, "sv", subvendor != CDX_ANY_ID, subvendor); 1353 ADD(alias, "sd", subdevice != CDX_ANY_ID, subdevice); 1354 ADD(alias, "c", class_mask == 0xFFFFFF, class); 1355 1356 module_alias_printf(mod, false, "%s", alias); 1357 } 1358 1359 static void do_vchiq_entry(struct module *mod, void *symval) 1360 { 1361 DEF_FIELD_ADDR(symval, vchiq_device_id, name); 1362 1363 module_alias_printf(mod, false, "vchiq:%s", *name); 1364 } 1365 1366 /* Looks like: coreboot:tN */ 1367 static void do_coreboot_entry(struct module *mod, void *symval) 1368 { 1369 DEF_FIELD(symval, coreboot_device_id, tag); 1370 1371 module_alias_printf(mod, false, "coreboot:t%08X", tag); 1372 } 1373 1374 /* Does namelen bytes of name exactly match the symbol? */ 1375 static bool sym_is(const char *name, unsigned namelen, const char *symbol) 1376 { 1377 if (namelen != strlen(symbol)) 1378 return false; 1379 1380 return memcmp(name, symbol, namelen) == 0; 1381 } 1382 1383 static void do_table(const char *name, void *symval, unsigned long size, 1384 unsigned long id_size, 1385 const char *device_id, 1386 void (*do_entry)(struct module *mod, void *symval), 1387 struct module *mod) 1388 { 1389 unsigned int i; 1390 1391 if (size % id_size || size < id_size) { 1392 error("%s: type mismatch between %s[] and MODULE_DEVICE_TABLE(%s, ...)\n", 1393 mod->name, name, device_id); 1394 return; 1395 } 1396 1397 /* Verify the last entry is a terminator */ 1398 for (i = size - id_size; i < size; i++) { 1399 if (*(uint8_t *)(symval + i)) { 1400 error("%s: %s[] is not terminated with a NULL entry\n", 1401 mod->name, name); 1402 return; 1403 } 1404 } 1405 1406 /* Leave last one: it's the terminator. */ 1407 size -= id_size; 1408 1409 for (i = 0; i < size; i += id_size) 1410 do_entry(mod, symval + i); 1411 } 1412 1413 static const struct devtable devtable[] = { 1414 {"hid", SIZE_hid_device_id, do_hid_entry}, 1415 {"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry}, 1416 {"pci", SIZE_pci_device_id, do_pci_entry}, 1417 {"ccw", SIZE_ccw_device_id, do_ccw_entry}, 1418 {"ap", SIZE_ap_device_id, do_ap_entry}, 1419 {"css", SIZE_css_device_id, do_css_entry}, 1420 {"serio", SIZE_serio_device_id, do_serio_entry}, 1421 {"acpi", SIZE_acpi_device_id, do_acpi_entry}, 1422 {"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry}, 1423 {"vio", SIZE_vio_device_id, do_vio_entry}, 1424 {"input", SIZE_input_device_id, do_input_entry}, 1425 {"eisa", SIZE_eisa_device_id, do_eisa_entry}, 1426 {"parisc", SIZE_parisc_device_id, do_parisc_entry}, 1427 {"sdio", SIZE_sdio_device_id, do_sdio_entry}, 1428 {"ssb", SIZE_ssb_device_id, do_ssb_entry}, 1429 {"bcma", SIZE_bcma_device_id, do_bcma_entry}, 1430 {"virtio", SIZE_virtio_device_id, do_virtio_entry}, 1431 {"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry}, 1432 {"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry}, 1433 {"i2c", SIZE_i2c_device_id, do_i2c_entry}, 1434 {"i3c", SIZE_i3c_device_id, do_i3c_entry}, 1435 {"slim", SIZE_slim_device_id, do_slim_entry}, 1436 {"spi", SIZE_spi_device_id, do_spi_entry}, 1437 {"dmi", SIZE_dmi_system_id, do_dmi_entry}, 1438 {"platform", SIZE_platform_device_id, do_platform_entry}, 1439 {"mdio", SIZE_mdio_device_id, do_mdio_entry}, 1440 {"zorro", SIZE_zorro_device_id, do_zorro_entry}, 1441 {"isapnp", SIZE_isapnp_device_id, do_isapnp_entry}, 1442 {"ipack", SIZE_ipack_device_id, do_ipack_entry}, 1443 {"amba", SIZE_amba_id, do_amba_entry}, 1444 {"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry}, 1445 {"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry}, 1446 {"cpu", SIZE_cpu_feature, do_cpu_entry}, 1447 {"mei", SIZE_mei_cl_device_id, do_mei_entry}, 1448 {"rapidio", SIZE_rio_device_id, do_rio_entry}, 1449 {"ulpi", SIZE_ulpi_device_id, do_ulpi_entry}, 1450 {"hdaudio", SIZE_hda_device_id, do_hda_entry}, 1451 {"sdw", SIZE_sdw_device_id, do_sdw_entry}, 1452 {"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry}, 1453 {"tbsvc", SIZE_tb_service_id, do_tbsvc_entry}, 1454 {"typec", SIZE_typec_device_id, do_typec_entry}, 1455 {"tee", SIZE_tee_client_device_id, do_tee_entry}, 1456 {"wmi", SIZE_wmi_device_id, do_wmi_entry}, 1457 {"mhi", SIZE_mhi_device_id, do_mhi_entry}, 1458 {"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry}, 1459 {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry}, 1460 {"ssam", SIZE_ssam_device_id, do_ssam_entry}, 1461 {"dfl", SIZE_dfl_device_id, do_dfl_entry}, 1462 {"ishtp", SIZE_ishtp_device_id, do_ishtp_entry}, 1463 {"cdx", SIZE_cdx_device_id, do_cdx_entry}, 1464 {"vchiq", SIZE_vchiq_device_id, do_vchiq_entry}, 1465 {"coreboot", SIZE_coreboot_device_id, do_coreboot_entry}, 1466 {"of", SIZE_of_device_id, do_of_entry}, 1467 {"usb", SIZE_usb_device_id, do_usb_entry_multi}, 1468 {"pnp", SIZE_pnp_device_id, do_pnp_device_entry}, 1469 {"pnp_card", SIZE_pnp_card_device_id, do_pnp_card_entry}, 1470 }; 1471 1472 /* Create MODULE_ALIAS() statements. 1473 * At this time, we cannot write the actual output C source yet, 1474 * so we write into the mod->dev_table_buf buffer. */ 1475 void handle_moddevtable(struct module *mod, struct elf_info *info, 1476 Elf_Sym *sym, const char *symname) 1477 { 1478 void *symval; 1479 char *zeros = NULL; 1480 const char *type, *name, *modname; 1481 size_t typelen, modnamelen; 1482 static const char *prefix = "__mod_device_table__"; 1483 1484 /* We're looking for a section relative symbol */ 1485 if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections) 1486 return; 1487 1488 /* We're looking for an object */ 1489 if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT) 1490 return; 1491 1492 /* All our symbols are of form __mod_device_table__kmod_<modname>__<type>__<name>. */ 1493 if (!strstarts(symname, prefix)) 1494 return; 1495 1496 modname = strstr(symname, "__kmod_"); 1497 if (!modname) 1498 return; 1499 modname += strlen("__kmod_"); 1500 1501 type = strstr(modname, "__"); 1502 if (!type) 1503 return; 1504 modnamelen = type - modname; 1505 type += strlen("__"); 1506 1507 name = strstr(type, "__"); 1508 if (!name) 1509 return; 1510 typelen = name - type; 1511 name += strlen("__"); 1512 1513 /* Handle all-NULL symbols allocated into .bss */ 1514 if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) { 1515 zeros = calloc(1, sym->st_size); 1516 symval = zeros; 1517 } else { 1518 symval = sym_get_data(info, sym); 1519 } 1520 1521 for (int i = 0; i < ARRAY_SIZE(devtable); i++) { 1522 const struct devtable *p = &devtable[i]; 1523 1524 if (sym_is(type, typelen, p->device_id)) { 1525 do_table(name, symval, sym->st_size, p->id_size, 1526 p->device_id, p->do_entry, mod); 1527 break; 1528 } 1529 } 1530 1531 if (mod->is_vmlinux) { 1532 struct module_alias *alias; 1533 1534 /* 1535 * If this is vmlinux, record the name of the builtin module. 1536 * Traverse the linked list in the reverse order, and set the 1537 * builtin_modname unless it has already been set in the 1538 * previous call. 1539 */ 1540 list_for_each_entry_reverse(alias, &mod->aliases, node) { 1541 if (alias->builtin_modname) 1542 break; 1543 alias->builtin_modname = xstrndup(modname, modnamelen); 1544 } 1545 } 1546 1547 free(zeros); 1548 } 1549