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 __attribute__((format(printf, 3, 4))) 655 alias_append(char *alias, size_t size, const char *fmt, ...) 656 { 657 size_t len = strlen(alias); 658 va_list args; 659 int n; 660 661 if (len >= size) 662 fatal("alias buffer (%zu) overflow before append\n", size); 663 664 va_start(args, fmt); 665 n = vsnprintf(alias + len, size - len, fmt, args); 666 va_end(args); 667 668 if (n < 0 || (size_t)n >= size - len) 669 fatal("alias buffer (%zu) overflow on append (need %d, have %zu)\n", 670 size, n, size - len); 671 } 672 673 static void do_input(char *alias, size_t size, 674 kernel_ulong_t *arr, unsigned int min, unsigned int max) 675 { 676 unsigned int i; 677 678 for (i = min; i <= max; i++) 679 if (get_unaligned_native(arr + i / BITS_PER_LONG) & 680 (1ULL << (i % BITS_PER_LONG))) 681 alias_append(alias, size, "%X,*", i); 682 } 683 684 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */ 685 static void do_input_entry(struct module *mod, void *symval) 686 { 687 char alias[256] = {}; 688 const size_t sizeof_alias = sizeof(alias); 689 690 DEF_FIELD(symval, input_device_id, flags); 691 DEF_FIELD(symval, input_device_id, bustype); 692 DEF_FIELD(symval, input_device_id, vendor); 693 DEF_FIELD(symval, input_device_id, product); 694 DEF_FIELD(symval, input_device_id, version); 695 DEF_FIELD_ADDR(symval, input_device_id, evbit); 696 DEF_FIELD_ADDR(symval, input_device_id, keybit); 697 DEF_FIELD_ADDR(symval, input_device_id, relbit); 698 DEF_FIELD_ADDR(symval, input_device_id, absbit); 699 DEF_FIELD_ADDR(symval, input_device_id, mscbit); 700 DEF_FIELD_ADDR(symval, input_device_id, ledbit); 701 DEF_FIELD_ADDR(symval, input_device_id, sndbit); 702 DEF_FIELD_ADDR(symval, input_device_id, ffbit); 703 DEF_FIELD_ADDR(symval, input_device_id, swbit); 704 705 ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype); 706 ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor); 707 ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product); 708 ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version); 709 710 alias_append(alias, sizeof_alias, "-e*"); 711 if (flags & INPUT_DEVICE_ID_MATCH_EVBIT) 712 do_input(alias, sizeof_alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX); 713 alias_append(alias, sizeof_alias, "k*"); 714 if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT) 715 do_input(alias, sizeof_alias, *keybit, 716 INPUT_DEVICE_ID_KEY_MIN_INTERESTING, 717 INPUT_DEVICE_ID_KEY_MAX); 718 alias_append(alias, sizeof_alias, "r*"); 719 if (flags & INPUT_DEVICE_ID_MATCH_RELBIT) 720 do_input(alias, sizeof_alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX); 721 alias_append(alias, sizeof_alias, "a*"); 722 if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT) 723 do_input(alias, sizeof_alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX); 724 alias_append(alias, sizeof_alias, "m*"); 725 if (flags & INPUT_DEVICE_ID_MATCH_MSCIT) 726 do_input(alias, sizeof_alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX); 727 alias_append(alias, sizeof_alias, "l*"); 728 if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT) 729 do_input(alias, sizeof_alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX); 730 alias_append(alias, sizeof_alias, "s*"); 731 if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT) 732 do_input(alias, sizeof_alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX); 733 alias_append(alias, sizeof_alias, "f*"); 734 if (flags & INPUT_DEVICE_ID_MATCH_FFBIT) 735 do_input(alias, sizeof_alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX); 736 alias_append(alias, sizeof_alias, "w*"); 737 if (flags & INPUT_DEVICE_ID_MATCH_SWBIT) 738 do_input(alias, sizeof_alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX); 739 740 module_alias_printf(mod, false, "input:%s", alias); 741 } 742 743 static void do_eisa_entry(struct module *mod, void *symval) 744 { 745 DEF_FIELD_ADDR(symval, eisa_device_id, sig); 746 module_alias_printf(mod, false, EISA_DEVICE_MODALIAS_FMT "*", *sig); 747 } 748 749 /* Looks like: parisc:tNhvNrevNsvN */ 750 static void do_parisc_entry(struct module *mod, void *symval) 751 { 752 char alias[256] = {}; 753 754 DEF_FIELD(symval, parisc_device_id, hw_type); 755 DEF_FIELD(symval, parisc_device_id, hversion); 756 DEF_FIELD(symval, parisc_device_id, hversion_rev); 757 DEF_FIELD(symval, parisc_device_id, sversion); 758 759 ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type); 760 ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion); 761 ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev); 762 ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion); 763 764 module_alias_printf(mod, true, "parisc:%s", alias); 765 } 766 767 /* Looks like: sdio:cNvNdN. */ 768 static void do_sdio_entry(struct module *mod, void *symval) 769 { 770 char alias[256] = {}; 771 772 DEF_FIELD(symval, sdio_device_id, class); 773 DEF_FIELD(symval, sdio_device_id, vendor); 774 DEF_FIELD(symval, sdio_device_id, device); 775 776 ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class); 777 ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor); 778 ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device); 779 780 module_alias_printf(mod, true, "sdio:%s", alias); 781 } 782 783 /* Looks like: ssb:vNidNrevN. */ 784 static void do_ssb_entry(struct module *mod, void *symval) 785 { 786 char alias[256] = {}; 787 788 DEF_FIELD(symval, ssb_device_id, vendor); 789 DEF_FIELD(symval, ssb_device_id, coreid); 790 DEF_FIELD(symval, ssb_device_id, revision); 791 792 ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor); 793 ADD(alias, "id", coreid != SSB_ANY_ID, coreid); 794 ADD(alias, "rev", revision != SSB_ANY_REV, revision); 795 796 module_alias_printf(mod, true, "ssb:%s", alias); 797 } 798 799 /* Looks like: bcma:mNidNrevNclN. */ 800 static void do_bcma_entry(struct module *mod, void *symval) 801 { 802 char alias[256] = {}; 803 804 DEF_FIELD(symval, bcma_device_id, manuf); 805 DEF_FIELD(symval, bcma_device_id, id); 806 DEF_FIELD(symval, bcma_device_id, rev); 807 DEF_FIELD(symval, bcma_device_id, class); 808 809 ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf); 810 ADD(alias, "id", id != BCMA_ANY_ID, id); 811 ADD(alias, "rev", rev != BCMA_ANY_REV, rev); 812 ADD(alias, "cl", class != BCMA_ANY_CLASS, class); 813 814 module_alias_printf(mod, true, "bcma:%s", alias); 815 } 816 817 /* Looks like: virtio:dNvN */ 818 static void do_virtio_entry(struct module *mod, void *symval) 819 { 820 char alias[256] = {}; 821 822 DEF_FIELD(symval, virtio_device_id, device); 823 DEF_FIELD(symval, virtio_device_id, vendor); 824 825 ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device); 826 ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor); 827 828 module_alias_printf(mod, true, "virtio:%s", alias); 829 } 830 831 /* 832 * Looks like: vmbus:guid 833 * Each byte of the guid will be represented by two hex characters 834 * in the name. 835 */ 836 static void do_vmbus_entry(struct module *mod, void *symval) 837 { 838 DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid); 839 char guid_name[sizeof(*guid) * 2 + 1]; 840 841 for (int i = 0; i < sizeof(*guid); i++) 842 sprintf(&guid_name[i * 2], "%02x", guid->b[i]); 843 844 module_alias_printf(mod, false, "vmbus:%s", guid_name); 845 } 846 847 /* Looks like: rpmsg:S */ 848 static void do_rpmsg_entry(struct module *mod, void *symval) 849 { 850 DEF_FIELD_ADDR(symval, rpmsg_device_id, name); 851 852 module_alias_printf(mod, false, RPMSG_DEVICE_MODALIAS_FMT, *name); 853 } 854 855 /* Looks like: i2c:S */ 856 static void do_i2c_entry(struct module *mod, void *symval) 857 { 858 DEF_FIELD_ADDR(symval, i2c_device_id, name); 859 860 module_alias_printf(mod, false, I2C_MODULE_PREFIX "%s", *name); 861 } 862 863 static void do_i3c_entry(struct module *mod, void *symval) 864 { 865 char alias[256] = {}; 866 867 DEF_FIELD(symval, i3c_device_id, match_flags); 868 DEF_FIELD(symval, i3c_device_id, dcr); 869 DEF_FIELD(symval, i3c_device_id, manuf_id); 870 DEF_FIELD(symval, i3c_device_id, part_id); 871 DEF_FIELD(symval, i3c_device_id, extra_info); 872 873 ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr); 874 ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id); 875 ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id); 876 ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info); 877 878 module_alias_printf(mod, false, "i3c:%s", alias); 879 } 880 881 static void do_slim_entry(struct module *mod, void *symval) 882 { 883 DEF_FIELD(symval, slim_device_id, manf_id); 884 DEF_FIELD(symval, slim_device_id, prod_code); 885 886 module_alias_printf(mod, false, "slim:%x:%x:*", manf_id, prod_code); 887 } 888 889 /* Looks like: spi:S */ 890 static void do_spi_entry(struct module *mod, void *symval) 891 { 892 DEF_FIELD_ADDR(symval, spi_device_id, name); 893 894 module_alias_printf(mod, false, SPI_MODULE_PREFIX "%s", *name); 895 } 896 897 static const struct dmifield { 898 const char *prefix; 899 int field; 900 } dmi_fields[] = { 901 { "bvn", DMI_BIOS_VENDOR }, 902 { "bvr", DMI_BIOS_VERSION }, 903 { "bd", DMI_BIOS_DATE }, 904 { "br", DMI_BIOS_RELEASE }, 905 { "efr", DMI_EC_FIRMWARE_RELEASE }, 906 { "svn", DMI_SYS_VENDOR }, 907 { "pn", DMI_PRODUCT_NAME }, 908 { "pvr", DMI_PRODUCT_VERSION }, 909 { "rvn", DMI_BOARD_VENDOR }, 910 { "rn", DMI_BOARD_NAME }, 911 { "rvr", DMI_BOARD_VERSION }, 912 { "cvn", DMI_CHASSIS_VENDOR }, 913 { "ct", DMI_CHASSIS_TYPE }, 914 { "cvr", DMI_CHASSIS_VERSION }, 915 { NULL, DMI_NONE } 916 }; 917 918 static void dmi_ascii_filter(char *d, size_t avail, const char *s) 919 { 920 /* Filter out characters we don't want to see in the modalias string */ 921 for (; *s; s++) 922 if (*s > ' ' && *s < 127 && *s != ':') { 923 if (avail <= 1) 924 fatal("%s: alias buffer overflow\n", __func__); 925 *(d++) = *s; 926 avail--; 927 } 928 929 *d = 0; 930 } 931 932 933 static void do_dmi_entry(struct module *mod, void *symval) 934 { 935 char alias[256] = {}; 936 const size_t sizeof_alias = sizeof(alias); 937 size_t len; 938 int i, j; 939 DEF_FIELD_ADDR(symval, dmi_system_id, matches); 940 941 for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) { 942 for (j = 0; j < 4; j++) { 943 if ((*matches)[j].slot && 944 (*matches)[j].slot == dmi_fields[i].field) { 945 alias_append(alias, sizeof_alias, ":%s*", 946 dmi_fields[i].prefix); 947 len = strlen(alias); 948 dmi_ascii_filter(alias + len, sizeof_alias - len, 949 (*matches)[j].substr); 950 alias_append(alias, sizeof_alias, "*"); 951 } 952 } 953 } 954 955 module_alias_printf(mod, false, "dmi*%s:", alias); 956 } 957 958 static void do_platform_entry(struct module *mod, void *symval) 959 { 960 DEF_FIELD_ADDR(symval, platform_device_id, name); 961 962 module_alias_printf(mod, false, PLATFORM_MODULE_PREFIX "%s", *name); 963 } 964 965 static void do_mdio_entry(struct module *mod, void *symval) 966 { 967 char id[33]; 968 int i; 969 DEF_FIELD(symval, mdio_device_id, phy_id); 970 DEF_FIELD(symval, mdio_device_id, phy_id_mask); 971 972 for (i = 0; i < 32; i++) { 973 if (!((phy_id_mask >> (31-i)) & 1)) 974 id[i] = '?'; 975 else if ((phy_id >> (31-i)) & 1) 976 id[i] = '1'; 977 else 978 id[i] = '0'; 979 } 980 981 /* Terminate the string */ 982 id[32] = '\0'; 983 984 module_alias_printf(mod, false, MDIO_MODULE_PREFIX "%s", id); 985 } 986 987 /* Looks like: zorro:iN. */ 988 static void do_zorro_entry(struct module *mod, void *symval) 989 { 990 char alias[256] = {}; 991 DEF_FIELD(symval, zorro_device_id, id); 992 993 ADD(alias, "i", id != ZORRO_WILDCARD, id); 994 995 module_alias_printf(mod, false, "zorro:%s", alias); 996 } 997 998 /* looks like: "pnp:dD" */ 999 static void do_isapnp_entry(struct module *mod, void *symval) 1000 { 1001 DEF_FIELD(symval, isapnp_device_id, vendor); 1002 DEF_FIELD(symval, isapnp_device_id, function); 1003 module_alias_printf(mod, false, "pnp:d%c%c%c%x%x%x%x*", 1004 'A' + ((vendor >> 2) & 0x3f) - 1, 1005 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, 1006 'A' + ((vendor >> 8) & 0x1f) - 1, 1007 (function >> 4) & 0x0f, function & 0x0f, 1008 (function >> 12) & 0x0f, (function >> 8) & 0x0f); 1009 } 1010 1011 /* Looks like: "ipack:fNvNdN". */ 1012 static void do_ipack_entry(struct module *mod, void *symval) 1013 { 1014 char alias[256] = {}; 1015 DEF_FIELD(symval, ipack_device_id, format); 1016 DEF_FIELD(symval, ipack_device_id, vendor); 1017 DEF_FIELD(symval, ipack_device_id, device); 1018 1019 ADD(alias, "f", format != IPACK_ANY_FORMAT, format); 1020 ADD(alias, "v", vendor != IPACK_ANY_ID, vendor); 1021 ADD(alias, "d", device != IPACK_ANY_ID, device); 1022 1023 module_alias_printf(mod, true, "ipack:%s", alias); 1024 } 1025 1026 /* 1027 * Append a match expression for a single masked hex digit. 1028 * outp points to a pointer to the character at which to append. 1029 * *outp is updated on return to point just after the appended text, 1030 * to facilitate further appending. 1031 */ 1032 static void append_nibble_mask(char **outp, 1033 unsigned int nibble, unsigned int mask) 1034 { 1035 char *p = *outp; 1036 unsigned int i; 1037 1038 switch (mask) { 1039 case 0: 1040 *p++ = '?'; 1041 break; 1042 1043 case 0xf: 1044 p += sprintf(p, "%X", nibble); 1045 break; 1046 1047 default: 1048 /* 1049 * Dumbly emit a match pattern for all possible matching 1050 * digits. This could be improved in some cases using ranges, 1051 * but it has the advantage of being trivially correct, and is 1052 * often optimal. 1053 */ 1054 *p++ = '['; 1055 for (i = 0; i < 0x10; i++) 1056 if ((i & mask) == nibble) 1057 p += sprintf(p, "%X", i); 1058 *p++ = ']'; 1059 } 1060 1061 /* Ensure that the string remains NUL-terminated: */ 1062 *p = '\0'; 1063 1064 /* Advance the caller's end-of-string pointer: */ 1065 *outp = p; 1066 } 1067 1068 /* 1069 * looks like: "amba:dN" 1070 * 1071 * N is exactly 8 digits, where each is an upper-case hex digit, or 1072 * a ? or [] pattern matching exactly one digit. 1073 */ 1074 static void do_amba_entry(struct module *mod, void *symval) 1075 { 1076 char alias[256]; 1077 unsigned int digit; 1078 char *p = alias; 1079 DEF_FIELD(symval, amba_id, id); 1080 DEF_FIELD(symval, amba_id, mask); 1081 1082 if ((id & mask) != id) 1083 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: id=0x%08X, mask=0x%08X. Please fix this driver.\n", 1084 mod->name, id, mask); 1085 1086 for (digit = 0; digit < 8; digit++) 1087 append_nibble_mask(&p, 1088 (id >> (4 * (7 - digit))) & 0xf, 1089 (mask >> (4 * (7 - digit))) & 0xf); 1090 1091 module_alias_printf(mod, false, "amba:d%s", alias); 1092 } 1093 1094 /* 1095 * looks like: "mipscdmm:tN" 1096 * 1097 * N is exactly 2 digits, where each is an upper-case hex digit, or 1098 * a ? or [] pattern matching exactly one digit. 1099 */ 1100 static void do_mips_cdmm_entry(struct module *mod, void *symval) 1101 { 1102 DEF_FIELD(symval, mips_cdmm_device_id, type); 1103 1104 module_alias_printf(mod, false, "mipscdmm:t%02X*", type); 1105 } 1106 1107 /* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,* 1108 * All fields are numbers. It would be nicer to use strings for vendor 1109 * and feature, but getting those out of the build system here is too 1110 * complicated. 1111 */ 1112 1113 static void do_x86cpu_entry(struct module *mod, void *symval) 1114 { 1115 char alias[256] = {}; 1116 1117 DEF_FIELD(symval, x86_cpu_id, feature); 1118 DEF_FIELD(symval, x86_cpu_id, family); 1119 DEF_FIELD(symval, x86_cpu_id, model); 1120 DEF_FIELD(symval, x86_cpu_id, vendor); 1121 1122 ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor); 1123 ADD(alias, "fam", family != X86_FAMILY_ANY, family); 1124 ADD(alias, "mod", model != X86_MODEL_ANY, model); 1125 strcat(alias, ":feature:*"); 1126 if (feature != X86_FEATURE_ANY) 1127 sprintf(alias + strlen(alias), "%04X*", feature); 1128 1129 module_alias_printf(mod, false, "cpu:type:x86,%s", alias); 1130 } 1131 1132 /* LOOKS like cpu:type:*:feature:*FEAT* */ 1133 static void do_cpu_entry(struct module *mod, void *symval) 1134 { 1135 DEF_FIELD(symval, cpu_feature, feature); 1136 1137 module_alias_printf(mod, false, "cpu:type:*:feature:*%04X*", feature); 1138 } 1139 1140 /* Looks like: mcb:16zN */ 1141 static void do_mcb_entry(struct module *mod, void *symval) 1142 { 1143 DEF_FIELD(symval, mcb_device_id, device); 1144 1145 module_alias_printf(mod, false, "mcb:16z%03d", device); 1146 } 1147 1148 /* Looks like: mei:S:uuid:N:* */ 1149 static void do_mei_entry(struct module *mod, void *symval) 1150 { 1151 char alias[256] = {}; 1152 1153 DEF_FIELD_ADDR(symval, mei_cl_device_id, name); 1154 DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid); 1155 DEF_FIELD(symval, mei_cl_device_id, version); 1156 1157 add_uuid(alias, *uuid); 1158 ADD(alias, ":", version != MEI_CL_VERSION_ANY, version); 1159 1160 module_alias_printf(mod, false, MEI_CL_MODULE_PREFIX "%s:%s:*", 1161 (*name)[0] ? *name : "*", alias); 1162 } 1163 1164 /* Looks like: rapidio:vNdNavNadN */ 1165 static void do_rio_entry(struct module *mod, void *symval) 1166 { 1167 char alias[256] = {}; 1168 1169 DEF_FIELD(symval, rio_device_id, did); 1170 DEF_FIELD(symval, rio_device_id, vid); 1171 DEF_FIELD(symval, rio_device_id, asm_did); 1172 DEF_FIELD(symval, rio_device_id, asm_vid); 1173 1174 ADD(alias, "v", vid != RIO_ANY_ID, vid); 1175 ADD(alias, "d", did != RIO_ANY_ID, did); 1176 ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid); 1177 ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did); 1178 1179 module_alias_printf(mod, true, "rapidio:%s", alias); 1180 } 1181 1182 /* Looks like: ulpi:vNpN */ 1183 static void do_ulpi_entry(struct module *mod, void *symval) 1184 { 1185 DEF_FIELD(symval, ulpi_device_id, vendor); 1186 DEF_FIELD(symval, ulpi_device_id, product); 1187 1188 module_alias_printf(mod, false, "ulpi:v%04xp%04x", vendor, product); 1189 } 1190 1191 /* Looks like: hdaudio:vNrNaN */ 1192 static void do_hda_entry(struct module *mod, void *symval) 1193 { 1194 char alias[256] = {}; 1195 1196 DEF_FIELD(symval, hda_device_id, vendor_id); 1197 DEF_FIELD(symval, hda_device_id, rev_id); 1198 DEF_FIELD(symval, hda_device_id, api_version); 1199 1200 ADD(alias, "v", vendor_id != 0, vendor_id); 1201 ADD(alias, "r", rev_id != 0, rev_id); 1202 ADD(alias, "a", api_version != 0, api_version); 1203 1204 module_alias_printf(mod, true, "hdaudio:%s", alias); 1205 } 1206 1207 /* Looks like: sdw:mNpNvNcN */ 1208 static void do_sdw_entry(struct module *mod, void *symval) 1209 { 1210 char alias[256] = {}; 1211 1212 DEF_FIELD(symval, sdw_device_id, mfg_id); 1213 DEF_FIELD(symval, sdw_device_id, part_id); 1214 DEF_FIELD(symval, sdw_device_id, sdw_version); 1215 DEF_FIELD(symval, sdw_device_id, class_id); 1216 1217 ADD(alias, "m", mfg_id != 0, mfg_id); 1218 ADD(alias, "p", part_id != 0, part_id); 1219 ADD(alias, "v", sdw_version != 0, sdw_version); 1220 ADD(alias, "c", class_id != 0, class_id); 1221 1222 module_alias_printf(mod, true, "sdw:%s", alias); 1223 } 1224 1225 /* Looks like: fsl-mc:vNdN */ 1226 static void do_fsl_mc_entry(struct module *mod, void *symval) 1227 { 1228 DEF_FIELD(symval, fsl_mc_device_id, vendor); 1229 DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type); 1230 1231 module_alias_printf(mod, false, "fsl-mc:v%08Xd%s", vendor, *obj_type); 1232 } 1233 1234 /* Looks like: tbsvc:kSpNvNrN */ 1235 static void do_tbsvc_entry(struct module *mod, void *symval) 1236 { 1237 char alias[256] = {}; 1238 1239 DEF_FIELD(symval, tb_service_id, match_flags); 1240 DEF_FIELD_ADDR(symval, tb_service_id, protocol_key); 1241 DEF_FIELD(symval, tb_service_id, protocol_id); 1242 DEF_FIELD(symval, tb_service_id, protocol_version); 1243 DEF_FIELD(symval, tb_service_id, protocol_revision); 1244 1245 if (match_flags & TBSVC_MATCH_PROTOCOL_KEY) 1246 sprintf(alias + strlen(alias), "k%s", *protocol_key); 1247 else 1248 strcat(alias + strlen(alias), "k*"); 1249 ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id); 1250 ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION, 1251 protocol_version); 1252 ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION, 1253 protocol_revision); 1254 1255 module_alias_printf(mod, true, "tbsvc:%s", alias); 1256 } 1257 1258 /* Looks like: typec:idN */ 1259 static void do_typec_entry(struct module *mod, void *symval) 1260 { 1261 DEF_FIELD(symval, typec_device_id, svid); 1262 1263 module_alias_printf(mod, false, "typec:id%04X", svid); 1264 } 1265 1266 /* Looks like: tee:uuid */ 1267 static void do_tee_entry(struct module *mod, void *symval) 1268 { 1269 DEF_FIELD_ADDR(symval, tee_client_device_id, uuid); 1270 1271 module_alias_printf(mod, true, 1272 "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", 1273 uuid->b[0], uuid->b[1], uuid->b[2], uuid->b[3], uuid->b[4], 1274 uuid->b[5], uuid->b[6], uuid->b[7], uuid->b[8], uuid->b[9], 1275 uuid->b[10], uuid->b[11], uuid->b[12], uuid->b[13], uuid->b[14], 1276 uuid->b[15]); 1277 } 1278 1279 /* Looks like: wmi:guid */ 1280 static void do_wmi_entry(struct module *mod, void *symval) 1281 { 1282 DEF_FIELD_ADDR(symval, wmi_device_id, guid_string); 1283 1284 if (strlen(*guid_string) != UUID_STRING_LEN) { 1285 warn("Invalid WMI device id 'wmi:%s' in '%s'\n", 1286 *guid_string, mod->name); 1287 return; 1288 } 1289 1290 module_alias_printf(mod, false, WMI_MODULE_PREFIX "%s", *guid_string); 1291 } 1292 1293 /* Looks like: mhi:S */ 1294 static void do_mhi_entry(struct module *mod, void *symval) 1295 { 1296 DEF_FIELD_ADDR(symval, mhi_device_id, chan); 1297 module_alias_printf(mod, false, MHI_DEVICE_MODALIAS_FMT, *chan); 1298 } 1299 1300 /* Looks like: mhi_ep:S */ 1301 static void do_mhi_ep_entry(struct module *mod, void *symval) 1302 { 1303 DEF_FIELD_ADDR(symval, mhi_device_id, chan); 1304 1305 module_alias_printf(mod, false, MHI_EP_DEVICE_MODALIAS_FMT, *chan); 1306 } 1307 1308 /* Looks like: ishtp:{guid} */ 1309 static void do_ishtp_entry(struct module *mod, void *symval) 1310 { 1311 char alias[256] = {}; 1312 DEF_FIELD_ADDR(symval, ishtp_device_id, guid); 1313 1314 add_guid(alias, *guid); 1315 1316 module_alias_printf(mod, false, ISHTP_MODULE_PREFIX "{%s}", alias); 1317 } 1318 1319 static void do_auxiliary_entry(struct module *mod, void *symval) 1320 { 1321 DEF_FIELD_ADDR(symval, auxiliary_device_id, name); 1322 1323 module_alias_printf(mod, false, AUXILIARY_MODULE_PREFIX "%s", *name); 1324 } 1325 1326 /* 1327 * Looks like: ssam:dNcNtNiNfN 1328 * 1329 * N is exactly 2 digits, where each is an upper-case hex digit. 1330 */ 1331 static void do_ssam_entry(struct module *mod, void *symval) 1332 { 1333 char alias[256] = {}; 1334 1335 DEF_FIELD(symval, ssam_device_id, match_flags); 1336 DEF_FIELD(symval, ssam_device_id, domain); 1337 DEF_FIELD(symval, ssam_device_id, category); 1338 DEF_FIELD(symval, ssam_device_id, target); 1339 DEF_FIELD(symval, ssam_device_id, instance); 1340 DEF_FIELD(symval, ssam_device_id, function); 1341 1342 ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target); 1343 ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance); 1344 ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function); 1345 1346 module_alias_printf(mod, false, "ssam:d%02Xc%02X%s", 1347 domain, category, alias); 1348 } 1349 1350 /* Looks like: dfl:tNfN */ 1351 static void do_dfl_entry(struct module *mod, void *symval) 1352 { 1353 DEF_FIELD(symval, dfl_device_id, type); 1354 DEF_FIELD(symval, dfl_device_id, feature_id); 1355 1356 module_alias_printf(mod, true, "dfl:t%04Xf%04X", type, feature_id); 1357 } 1358 1359 /* Looks like: cdx:vNdN */ 1360 static void do_cdx_entry(struct module *mod, void *symval) 1361 { 1362 char alias[256]; 1363 1364 DEF_FIELD(symval, cdx_device_id, vendor); 1365 DEF_FIELD(symval, cdx_device_id, device); 1366 DEF_FIELD(symval, cdx_device_id, subvendor); 1367 DEF_FIELD(symval, cdx_device_id, subdevice); 1368 DEF_FIELD(symval, cdx_device_id, class); 1369 DEF_FIELD(symval, cdx_device_id, class_mask); 1370 DEF_FIELD(symval, cdx_device_id, override_only); 1371 1372 switch (override_only) { 1373 case 0: 1374 strcpy(alias, "cdx:"); 1375 break; 1376 case CDX_ID_F_VFIO_DRIVER_OVERRIDE: 1377 strcpy(alias, "vfio_cdx:"); 1378 break; 1379 default: 1380 warn("Unknown CDX driver_override alias %08X\n", 1381 override_only); 1382 return; 1383 } 1384 1385 ADD(alias, "v", vendor != CDX_ANY_ID, vendor); 1386 ADD(alias, "d", device != CDX_ANY_ID, device); 1387 ADD(alias, "sv", subvendor != CDX_ANY_ID, subvendor); 1388 ADD(alias, "sd", subdevice != CDX_ANY_ID, subdevice); 1389 ADD(alias, "c", class_mask == 0xFFFFFF, class); 1390 1391 module_alias_printf(mod, false, "%s", alias); 1392 } 1393 1394 static void do_vchiq_entry(struct module *mod, void *symval) 1395 { 1396 DEF_FIELD_ADDR(symval, vchiq_device_id, name); 1397 1398 module_alias_printf(mod, false, "vchiq:%s", *name); 1399 } 1400 1401 /* Looks like: coreboot:tN */ 1402 static void do_coreboot_entry(struct module *mod, void *symval) 1403 { 1404 DEF_FIELD(symval, coreboot_device_id, tag); 1405 1406 module_alias_printf(mod, false, "coreboot:t%08X", tag); 1407 } 1408 1409 /* Does namelen bytes of name exactly match the symbol? */ 1410 static bool sym_is(const char *name, unsigned namelen, const char *symbol) 1411 { 1412 if (namelen != strlen(symbol)) 1413 return false; 1414 1415 return memcmp(name, symbol, namelen) == 0; 1416 } 1417 1418 static void do_table(const char *name, void *symval, unsigned long size, 1419 unsigned long id_size, 1420 const char *device_id, 1421 void (*do_entry)(struct module *mod, void *symval), 1422 struct module *mod) 1423 { 1424 unsigned int i; 1425 1426 if (size % id_size || size < id_size) { 1427 error("%s: type mismatch between %s[] and MODULE_DEVICE_TABLE(%s, ...)\n", 1428 mod->name, name, device_id); 1429 return; 1430 } 1431 1432 /* Verify the last entry is a terminator */ 1433 for (i = size - id_size; i < size; i++) { 1434 if (*(uint8_t *)(symval + i)) { 1435 error("%s: %s[] is not terminated with a NULL entry\n", 1436 mod->name, name); 1437 return; 1438 } 1439 } 1440 1441 /* Leave last one: it's the terminator. */ 1442 size -= id_size; 1443 1444 for (i = 0; i < size; i += id_size) 1445 do_entry(mod, symval + i); 1446 } 1447 1448 static const struct devtable devtable[] = { 1449 {"hid", SIZE_hid_device_id, do_hid_entry}, 1450 {"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry}, 1451 {"pci", SIZE_pci_device_id, do_pci_entry}, 1452 {"ccw", SIZE_ccw_device_id, do_ccw_entry}, 1453 {"ap", SIZE_ap_device_id, do_ap_entry}, 1454 {"css", SIZE_css_device_id, do_css_entry}, 1455 {"serio", SIZE_serio_device_id, do_serio_entry}, 1456 {"acpi", SIZE_acpi_device_id, do_acpi_entry}, 1457 {"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry}, 1458 {"vio", SIZE_vio_device_id, do_vio_entry}, 1459 {"input", SIZE_input_device_id, do_input_entry}, 1460 {"eisa", SIZE_eisa_device_id, do_eisa_entry}, 1461 {"parisc", SIZE_parisc_device_id, do_parisc_entry}, 1462 {"sdio", SIZE_sdio_device_id, do_sdio_entry}, 1463 {"ssb", SIZE_ssb_device_id, do_ssb_entry}, 1464 {"bcma", SIZE_bcma_device_id, do_bcma_entry}, 1465 {"virtio", SIZE_virtio_device_id, do_virtio_entry}, 1466 {"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry}, 1467 {"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry}, 1468 {"i2c", SIZE_i2c_device_id, do_i2c_entry}, 1469 {"i3c", SIZE_i3c_device_id, do_i3c_entry}, 1470 {"slim", SIZE_slim_device_id, do_slim_entry}, 1471 {"spi", SIZE_spi_device_id, do_spi_entry}, 1472 {"dmi", SIZE_dmi_system_id, do_dmi_entry}, 1473 {"platform", SIZE_platform_device_id, do_platform_entry}, 1474 {"mdio", SIZE_mdio_device_id, do_mdio_entry}, 1475 {"zorro", SIZE_zorro_device_id, do_zorro_entry}, 1476 {"isapnp", SIZE_isapnp_device_id, do_isapnp_entry}, 1477 {"ipack", SIZE_ipack_device_id, do_ipack_entry}, 1478 {"amba", SIZE_amba_id, do_amba_entry}, 1479 {"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry}, 1480 {"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry}, 1481 {"cpu", SIZE_cpu_feature, do_cpu_entry}, 1482 {"mcb", SIZE_mcb_device_id, do_mcb_entry}, 1483 {"mei", SIZE_mei_cl_device_id, do_mei_entry}, 1484 {"rapidio", SIZE_rio_device_id, do_rio_entry}, 1485 {"ulpi", SIZE_ulpi_device_id, do_ulpi_entry}, 1486 {"hdaudio", SIZE_hda_device_id, do_hda_entry}, 1487 {"sdw", SIZE_sdw_device_id, do_sdw_entry}, 1488 {"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry}, 1489 {"tbsvc", SIZE_tb_service_id, do_tbsvc_entry}, 1490 {"typec", SIZE_typec_device_id, do_typec_entry}, 1491 {"tee", SIZE_tee_client_device_id, do_tee_entry}, 1492 {"wmi", SIZE_wmi_device_id, do_wmi_entry}, 1493 {"mhi", SIZE_mhi_device_id, do_mhi_entry}, 1494 {"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry}, 1495 {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry}, 1496 {"ssam", SIZE_ssam_device_id, do_ssam_entry}, 1497 {"dfl", SIZE_dfl_device_id, do_dfl_entry}, 1498 {"ishtp", SIZE_ishtp_device_id, do_ishtp_entry}, 1499 {"cdx", SIZE_cdx_device_id, do_cdx_entry}, 1500 {"vchiq", SIZE_vchiq_device_id, do_vchiq_entry}, 1501 {"coreboot", SIZE_coreboot_device_id, do_coreboot_entry}, 1502 {"of", SIZE_of_device_id, do_of_entry}, 1503 {"usb", SIZE_usb_device_id, do_usb_entry_multi}, 1504 {"pnp", SIZE_pnp_device_id, do_pnp_device_entry}, 1505 {"pnp_card", SIZE_pnp_card_device_id, do_pnp_card_entry}, 1506 }; 1507 1508 /* Create MODULE_ALIAS() statements. 1509 * At this time, we cannot write the actual output C source yet, 1510 * so we write into the mod->dev_table_buf buffer. */ 1511 void handle_moddevtable(struct module *mod, struct elf_info *info, 1512 Elf_Sym *sym, const char *symname) 1513 { 1514 void *symval; 1515 char *zeros = NULL; 1516 const char *type, *name, *modname; 1517 size_t typelen, modnamelen; 1518 static const char *prefix = "__mod_device_table__"; 1519 1520 /* We're looking for a section relative symbol */ 1521 if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections) 1522 return; 1523 1524 /* We're looking for an object */ 1525 if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT) 1526 return; 1527 1528 /* All our symbols are of form __mod_device_table__kmod_<modname>__<type>__<name>. */ 1529 if (!strstarts(symname, prefix)) 1530 return; 1531 1532 modname = strstr(symname, "__kmod_"); 1533 if (!modname) 1534 return; 1535 modname += strlen("__kmod_"); 1536 1537 type = strstr(modname, "__"); 1538 if (!type) 1539 return; 1540 modnamelen = type - modname; 1541 type += strlen("__"); 1542 1543 name = strstr(type, "__"); 1544 if (!name) 1545 return; 1546 typelen = name - type; 1547 name += strlen("__"); 1548 1549 /* Handle all-NULL symbols allocated into .bss */ 1550 if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) { 1551 zeros = calloc(1, sym->st_size); 1552 symval = zeros; 1553 } else { 1554 symval = sym_get_data(info, sym); 1555 } 1556 1557 for (int i = 0; i < ARRAY_SIZE(devtable); i++) { 1558 const struct devtable *p = &devtable[i]; 1559 1560 if (sym_is(type, typelen, p->device_id)) { 1561 do_table(name, symval, sym->st_size, p->id_size, 1562 p->device_id, p->do_entry, mod); 1563 break; 1564 } 1565 } 1566 1567 if (mod->is_vmlinux) { 1568 struct module_alias *alias; 1569 1570 /* 1571 * If this is vmlinux, record the name of the builtin module. 1572 * Traverse the linked list in the reverse order, and set the 1573 * builtin_modname unless it has already been set in the 1574 * previous call. 1575 */ 1576 list_for_each_entry_reverse(alias, &mod->aliases, node) { 1577 if (alias->builtin_modname) 1578 break; 1579 alias->builtin_modname = xstrndup(modname, modnamelen); 1580 } 1581 } 1582 1583 free(zeros); 1584 } 1585