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/device-id/scmi.h" 125 #include "../../include/linux/mod_devicetable.h" 126 127 struct devtable { 128 const char *device_id; 129 unsigned long id_size; 130 void (*do_entry)(struct module *mod, void *symval); 131 }; 132 133 /* Define a variable f that holds the value of field f of struct devid 134 * based at address m. 135 */ 136 #define DEF_FIELD(m, devid, f) \ 137 typeof(((struct devid *)0)->f) f = \ 138 get_unaligned_native((typeof(f) *)((m) + OFF_##devid##_##f)) 139 140 /* Define a variable f that holds the address of field f of struct devid 141 * based at address m. Due to the way typeof works, for a field of type 142 * T[N] the variable has type T(*)[N], _not_ T*. 143 */ 144 #define DEF_FIELD_ADDR(m, devid, f) \ 145 typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f) 146 147 #define ADD(str, sep, cond, field) \ 148 do { \ 149 strcat(str, sep); \ 150 if (cond) \ 151 sprintf(str + strlen(str), \ 152 sizeof(field) == 1 ? "%02X" : \ 153 sizeof(field) == 2 ? "%04X" : \ 154 sizeof(field) == 4 ? "%08X" : "", \ 155 field); \ 156 else \ 157 sprintf(str + strlen(str), "*"); \ 158 } while(0) 159 160 static inline void add_uuid(char *str, uuid_le uuid) 161 { 162 int len = strlen(str); 163 164 sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", 165 uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0], 166 uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6], 167 uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11], 168 uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]); 169 } 170 171 static inline void add_guid(char *str, guid_t guid) 172 { 173 int len = strlen(str); 174 175 sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X", 176 guid.b[3], guid.b[2], guid.b[1], guid.b[0], 177 guid.b[5], guid.b[4], guid.b[7], guid.b[6], 178 guid.b[8], guid.b[9], guid.b[10], guid.b[11], 179 guid.b[12], guid.b[13], guid.b[14], guid.b[15]); 180 } 181 182 /* USB is special because the bcdDevice can be matched against a numeric range */ 183 /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */ 184 static void do_usb_entry(void *symval, 185 unsigned int bcdDevice_initial, int bcdDevice_initial_digits, 186 unsigned char range_lo, unsigned char range_hi, 187 unsigned char max, struct module *mod) 188 { 189 char alias[500]; 190 DEF_FIELD(symval, usb_device_id, match_flags); 191 DEF_FIELD(symval, usb_device_id, idVendor); 192 DEF_FIELD(symval, usb_device_id, idProduct); 193 DEF_FIELD(symval, usb_device_id, bcdDevice_lo); 194 DEF_FIELD(symval, usb_device_id, bDeviceClass); 195 DEF_FIELD(symval, usb_device_id, bDeviceSubClass); 196 DEF_FIELD(symval, usb_device_id, bDeviceProtocol); 197 DEF_FIELD(symval, usb_device_id, bInterfaceClass); 198 DEF_FIELD(symval, usb_device_id, bInterfaceSubClass); 199 DEF_FIELD(symval, usb_device_id, bInterfaceProtocol); 200 DEF_FIELD(symval, usb_device_id, bInterfaceNumber); 201 202 strcpy(alias, "usb:"); 203 ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR, 204 idVendor); 205 ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT, 206 idProduct); 207 208 strcat(alias, "d"); 209 if (bcdDevice_initial_digits) 210 sprintf(alias + strlen(alias), "%0*X", 211 bcdDevice_initial_digits, bcdDevice_initial); 212 if (range_lo == range_hi) 213 sprintf(alias + strlen(alias), "%X", range_lo); 214 else if (range_lo > 0 || range_hi < max) { 215 if (range_lo > 0x9 || range_hi < 0xA) 216 sprintf(alias + strlen(alias), 217 "[%X-%X]", 218 range_lo, 219 range_hi); 220 else { 221 sprintf(alias + strlen(alias), 222 range_lo < 0x9 ? "[%X-9" : "[%X", 223 range_lo); 224 sprintf(alias + strlen(alias), 225 range_hi > 0xA ? "A-%X]" : "%X]", 226 range_hi); 227 } 228 } 229 if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1)) 230 strcat(alias, "*"); 231 232 ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS, 233 bDeviceClass); 234 ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS, 235 bDeviceSubClass); 236 ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL, 237 bDeviceProtocol); 238 ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS, 239 bInterfaceClass); 240 ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS, 241 bInterfaceSubClass); 242 ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL, 243 bInterfaceProtocol); 244 ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER, 245 bInterfaceNumber); 246 247 module_alias_printf(mod, true, "%s", alias); 248 } 249 250 /* Handles increment/decrement of BCD formatted integers */ 251 /* Returns the previous value, so it works like i++ or i-- */ 252 static unsigned int incbcd(unsigned int *bcd, 253 int inc, 254 unsigned char max, 255 size_t chars) 256 { 257 unsigned int init = *bcd, i, j; 258 unsigned long long c, dec = 0; 259 260 /* If bcd is not in BCD format, just increment */ 261 if (max > 0x9) { 262 *bcd += inc; 263 return init; 264 } 265 266 /* Convert BCD to Decimal */ 267 for (i=0 ; i < chars ; i++) { 268 c = (*bcd >> (i << 2)) & 0xf; 269 c = c > 9 ? 9 : c; /* force to bcd just in case */ 270 for (j=0 ; j < i ; j++) 271 c = c * 10; 272 dec += c; 273 } 274 275 /* Do our increment/decrement */ 276 dec += inc; 277 *bcd = 0; 278 279 /* Convert back to BCD */ 280 for (i=0 ; i < chars ; i++) { 281 for (c=1,j=0 ; j < i ; j++) 282 c = c * 10; 283 c = (dec / c) % 10; 284 *bcd += c << (i << 2); 285 } 286 return init; 287 } 288 289 static void do_usb_entry_multi(struct module *mod, void *symval) 290 { 291 unsigned int devlo, devhi; 292 unsigned char chi, clo, max; 293 int ndigits; 294 295 DEF_FIELD(symval, usb_device_id, match_flags); 296 DEF_FIELD(symval, usb_device_id, idVendor); 297 DEF_FIELD(symval, usb_device_id, idProduct); 298 DEF_FIELD(symval, usb_device_id, bcdDevice_lo); 299 DEF_FIELD(symval, usb_device_id, bcdDevice_hi); 300 DEF_FIELD(symval, usb_device_id, bDeviceClass); 301 DEF_FIELD(symval, usb_device_id, bInterfaceClass); 302 303 devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ? 304 bcdDevice_lo : 0x0U; 305 devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ? 306 bcdDevice_hi : ~0x0U; 307 308 /* Figure out if this entry is in bcd or hex format */ 309 max = 0x9; /* Default to decimal format */ 310 for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) { 311 clo = (devlo >> (ndigits << 2)) & 0xf; 312 chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf; 313 if (clo > max || chi > max) { 314 max = 0xf; 315 break; 316 } 317 } 318 319 /* 320 * Some modules (visor) have empty slots as placeholder for 321 * run-time specification that results in catch-all alias 322 */ 323 if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass)) 324 return; 325 326 /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */ 327 for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) { 328 clo = devlo & 0xf; 329 chi = devhi & 0xf; 330 if (chi > max) /* If we are in bcd mode, truncate if necessary */ 331 chi = max; 332 devlo >>= 4; 333 devhi >>= 4; 334 335 if (devlo == devhi || !ndigits) { 336 do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod); 337 break; 338 } 339 340 if (clo > 0x0) 341 do_usb_entry(symval, 342 incbcd(&devlo, 1, max, 343 sizeof(bcdDevice_lo) * 2), 344 ndigits, clo, max, max, mod); 345 346 if (chi < max) 347 do_usb_entry(symval, 348 incbcd(&devhi, -1, max, 349 sizeof(bcdDevice_lo) * 2), 350 ndigits, 0x0, chi, max, mod); 351 } 352 } 353 354 static void do_of_entry(struct module *mod, void *symval) 355 { 356 char alias[500]; 357 int len; 358 char *tmp; 359 360 DEF_FIELD_ADDR(symval, of_device_id, name); 361 DEF_FIELD_ADDR(symval, of_device_id, type); 362 DEF_FIELD_ADDR(symval, of_device_id, compatible); 363 364 len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*", 365 (*type)[0] ? *type : "*"); 366 367 if ((*compatible)[0]) 368 sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "", 369 *compatible); 370 371 /* Replace all whitespace with underscores */ 372 for (tmp = alias; tmp && *tmp; tmp++) 373 if (isspace(*tmp)) 374 *tmp = '_'; 375 376 module_alias_printf(mod, false, "%s", alias); 377 module_alias_printf(mod, false, "%sC*", alias); 378 } 379 380 /* Looks like: hid:bNvNpN */ 381 static void do_hid_entry(struct module *mod, void *symval) 382 { 383 char alias[256] = {}; 384 385 DEF_FIELD(symval, hid_device_id, bus); 386 DEF_FIELD(symval, hid_device_id, group); 387 DEF_FIELD(symval, hid_device_id, vendor); 388 DEF_FIELD(symval, hid_device_id, product); 389 390 ADD(alias, "b", bus != HID_BUS_ANY, bus); 391 ADD(alias, "g", group != HID_GROUP_ANY, group); 392 ADD(alias, "v", vendor != HID_ANY_ID, vendor); 393 ADD(alias, "p", product != HID_ANY_ID, product); 394 395 module_alias_printf(mod, false, "hid:%s", alias); 396 } 397 398 /* Looks like: ieee1394:venNmoNspNverN */ 399 static void do_ieee1394_entry(struct module *mod, void *symval) 400 { 401 char alias[256] = {}; 402 403 DEF_FIELD(symval, ieee1394_device_id, match_flags); 404 DEF_FIELD(symval, ieee1394_device_id, vendor_id); 405 DEF_FIELD(symval, ieee1394_device_id, model_id); 406 DEF_FIELD(symval, ieee1394_device_id, specifier_id); 407 DEF_FIELD(symval, ieee1394_device_id, version); 408 409 ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID, 410 vendor_id); 411 ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID, 412 model_id); 413 ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID, 414 specifier_id); 415 ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION, 416 version); 417 418 module_alias_printf(mod, true, "ieee1394:%s", alias); 419 } 420 421 /* Looks like: pci:vNdNsvNsdNbcNscNiN or <prefix>_pci:vNdNsvNsdNbcNscNiN. */ 422 static void do_pci_entry(struct module *mod, void *symval) 423 { 424 char alias[256]; 425 /* Class field can be divided into these three. */ 426 unsigned char baseclass, subclass, interface, 427 baseclass_mask, subclass_mask, interface_mask; 428 429 DEF_FIELD(symval, pci_device_id, vendor); 430 DEF_FIELD(symval, pci_device_id, device); 431 DEF_FIELD(symval, pci_device_id, subvendor); 432 DEF_FIELD(symval, pci_device_id, subdevice); 433 DEF_FIELD(symval, pci_device_id, class); 434 DEF_FIELD(symval, pci_device_id, class_mask); 435 DEF_FIELD(symval, pci_device_id, override_only); 436 437 switch (override_only) { 438 case 0: 439 strcpy(alias, "pci:"); 440 break; 441 case PCI_ID_F_VFIO_DRIVER_OVERRIDE: 442 strcpy(alias, "vfio_pci:"); 443 break; 444 default: 445 warn("Unknown PCI driver_override alias %08X\n", 446 override_only); 447 } 448 449 ADD(alias, "v", vendor != PCI_ANY_ID, vendor); 450 ADD(alias, "d", device != PCI_ANY_ID, device); 451 ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor); 452 ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice); 453 454 baseclass = (class) >> 16; 455 baseclass_mask = (class_mask) >> 16; 456 subclass = (class) >> 8; 457 subclass_mask = (class_mask) >> 8; 458 interface = class; 459 interface_mask = class_mask; 460 461 if ((baseclass_mask != 0 && baseclass_mask != 0xFF) 462 || (subclass_mask != 0 && subclass_mask != 0xFF) 463 || (interface_mask != 0 && interface_mask != 0xFF)) { 464 warn("Can't handle masks in %s:%04X\n", 465 mod->name, class_mask); 466 return; 467 } 468 469 ADD(alias, "bc", baseclass_mask == 0xFF, baseclass); 470 ADD(alias, "sc", subclass_mask == 0xFF, subclass); 471 ADD(alias, "i", interface_mask == 0xFF, interface); 472 473 module_alias_printf(mod, true, "%s", alias); 474 } 475 476 /* looks like: "ccw:tNmNdtNdmN" */ 477 static void do_ccw_entry(struct module *mod, void *symval) 478 { 479 char alias[256] = {}; 480 481 DEF_FIELD(symval, ccw_device_id, match_flags); 482 DEF_FIELD(symval, ccw_device_id, cu_type); 483 DEF_FIELD(symval, ccw_device_id, cu_model); 484 DEF_FIELD(symval, ccw_device_id, dev_type); 485 DEF_FIELD(symval, ccw_device_id, dev_model); 486 487 ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE, 488 cu_type); 489 ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL, 490 cu_model); 491 ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE, 492 dev_type); 493 ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL, 494 dev_model); 495 496 module_alias_printf(mod, true, "ccw:%s", alias); 497 } 498 499 /* looks like: "ap:tN" */ 500 static void do_ap_entry(struct module *mod, void *symval) 501 { 502 DEF_FIELD(symval, ap_device_id, dev_type); 503 504 module_alias_printf(mod, false, "ap:t%02X*", dev_type); 505 } 506 507 /* looks like: "css:tN" */ 508 static void do_css_entry(struct module *mod, void *symval) 509 { 510 DEF_FIELD(symval, css_device_id, type); 511 512 module_alias_printf(mod, false, "css:t%01X", type); 513 } 514 515 /* Looks like: "serio:tyNprNidNexN" */ 516 static void do_serio_entry(struct module *mod, void *symval) 517 { 518 char alias[256] = {}; 519 520 DEF_FIELD(symval, serio_device_id, type); 521 DEF_FIELD(symval, serio_device_id, proto); 522 DEF_FIELD(symval, serio_device_id, id); 523 DEF_FIELD(symval, serio_device_id, extra); 524 525 ADD(alias, "ty", type != SERIO_ANY, type); 526 ADD(alias, "pr", proto != SERIO_ANY, proto); 527 ADD(alias, "id", id != SERIO_ANY, id); 528 ADD(alias, "ex", extra != SERIO_ANY, extra); 529 530 module_alias_printf(mod, true, "serio:%s", alias); 531 } 532 533 /* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or 534 * "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if) 535 * 536 * NOTE: Each driver should use one of the following : _HID, _CIDs 537 * or _CLS. Also, bb, ss, and pp can be substituted with ?? 538 * as don't care byte. 539 */ 540 static void do_acpi_entry(struct module *mod, void *symval) 541 { 542 DEF_FIELD_ADDR(symval, acpi_device_id, id); 543 DEF_FIELD(symval, acpi_device_id, cls); 544 DEF_FIELD(symval, acpi_device_id, cls_msk); 545 546 if ((*id)[0]) 547 module_alias_printf(mod, false, "acpi*:%s:*", *id); 548 else { 549 char alias[256]; 550 int i, byte_shift, cnt = 0; 551 unsigned int msk; 552 553 for (i = 1; i <= 3; i++) { 554 byte_shift = 8 * (3-i); 555 msk = (cls_msk >> byte_shift) & 0xFF; 556 if (msk) 557 sprintf(&alias[cnt], "%02x", 558 (cls >> byte_shift) & 0xFF); 559 else 560 sprintf(&alias[cnt], "??"); 561 cnt += 2; 562 } 563 module_alias_printf(mod, false, "acpi*:%s:*", alias); 564 } 565 } 566 567 /* looks like: "pnp:dD" */ 568 static void do_pnp_device_entry(struct module *mod, void *symval) 569 { 570 DEF_FIELD_ADDR(symval, pnp_device_id, id); 571 char acpi_id[sizeof(*id)]; 572 573 /* fix broken pnp bus lowercasing */ 574 for (unsigned int i = 0; i < sizeof(acpi_id); i++) 575 acpi_id[i] = toupper((*id)[i]); 576 module_alias_printf(mod, false, "pnp:d%s*", *id); 577 module_alias_printf(mod, false, "acpi*:%s:*", acpi_id); 578 } 579 580 /* looks like: "pnp:dD" for every device of the card */ 581 static void do_pnp_card_entry(struct module *mod, void *symval) 582 { 583 DEF_FIELD_ADDR(symval, pnp_card_device_id, devs); 584 585 for (unsigned int i = 0; i < PNP_MAX_DEVICES; i++) { 586 const char *id = (char *)(*devs)[i].id; 587 char acpi_id[PNP_ID_LEN]; 588 589 if (!id[0]) 590 break; 591 592 /* fix broken pnp bus lowercasing */ 593 for (unsigned int j = 0; j < sizeof(acpi_id); j++) 594 acpi_id[j] = toupper(id[j]); 595 596 /* add an individual alias for every device entry */ 597 module_alias_printf(mod, false, "pnp:d%s*", id); 598 module_alias_printf(mod, false, "acpi*:%s:*", acpi_id); 599 } 600 } 601 602 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */ 603 static void do_pcmcia_entry(struct module *mod, void *symval) 604 { 605 char alias[256] = {}; 606 607 DEF_FIELD(symval, pcmcia_device_id, match_flags); 608 DEF_FIELD(symval, pcmcia_device_id, manf_id); 609 DEF_FIELD(symval, pcmcia_device_id, card_id); 610 DEF_FIELD(symval, pcmcia_device_id, func_id); 611 DEF_FIELD(symval, pcmcia_device_id, function); 612 DEF_FIELD(symval, pcmcia_device_id, device_no); 613 DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash); 614 615 ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID, 616 manf_id); 617 ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID, 618 card_id); 619 ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID, 620 func_id); 621 ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION, 622 function); 623 ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO, 624 device_no); 625 ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, 626 get_unaligned_native(*prod_id_hash + 0)); 627 ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, 628 get_unaligned_native(*prod_id_hash + 1)); 629 ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, 630 get_unaligned_native(*prod_id_hash + 2)); 631 ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, 632 get_unaligned_native(*prod_id_hash + 3)); 633 634 module_alias_printf(mod, true, "pcmcia:%s", alias); 635 } 636 637 static void do_vio_entry(struct module *mod, void *symval) 638 { 639 char alias[256]; 640 char *tmp; 641 DEF_FIELD_ADDR(symval, vio_device_id, type); 642 DEF_FIELD_ADDR(symval, vio_device_id, compat); 643 644 sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*", 645 (*compat)[0] ? *compat : "*"); 646 647 /* Replace all whitespace with underscores */ 648 for (tmp = alias; tmp && *tmp; tmp++) 649 if (isspace (*tmp)) 650 *tmp = '_'; 651 652 module_alias_printf(mod, true, "%s", alias); 653 } 654 655 static void __attribute__((format(printf, 3, 4))) 656 alias_append(char *alias, size_t size, const char *fmt, ...) 657 { 658 size_t len = strlen(alias); 659 va_list args; 660 int n; 661 662 if (len >= size) 663 fatal("alias buffer (%zu) overflow before append\n", size); 664 665 va_start(args, fmt); 666 n = vsnprintf(alias + len, size - len, fmt, args); 667 va_end(args); 668 669 if (n < 0 || (size_t)n >= size - len) 670 fatal("alias buffer (%zu) overflow on append (need %d, have %zu)\n", 671 size, n, size - len); 672 } 673 674 static void do_input(char *alias, size_t size, 675 kernel_ulong_t *arr, unsigned int min, unsigned int max) 676 { 677 unsigned int i; 678 679 for (i = min; i <= max; i++) 680 if (get_unaligned_native(arr + i / BITS_PER_LONG) & 681 (1ULL << (i % BITS_PER_LONG))) 682 alias_append(alias, size, "%X,*", i); 683 } 684 685 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */ 686 static void do_input_entry(struct module *mod, void *symval) 687 { 688 char alias[256] = {}; 689 const size_t sizeof_alias = sizeof(alias); 690 691 DEF_FIELD(symval, input_device_id, flags); 692 DEF_FIELD(symval, input_device_id, bustype); 693 DEF_FIELD(symval, input_device_id, vendor); 694 DEF_FIELD(symval, input_device_id, product); 695 DEF_FIELD(symval, input_device_id, version); 696 DEF_FIELD_ADDR(symval, input_device_id, evbit); 697 DEF_FIELD_ADDR(symval, input_device_id, keybit); 698 DEF_FIELD_ADDR(symval, input_device_id, relbit); 699 DEF_FIELD_ADDR(symval, input_device_id, absbit); 700 DEF_FIELD_ADDR(symval, input_device_id, mscbit); 701 DEF_FIELD_ADDR(symval, input_device_id, ledbit); 702 DEF_FIELD_ADDR(symval, input_device_id, sndbit); 703 DEF_FIELD_ADDR(symval, input_device_id, ffbit); 704 DEF_FIELD_ADDR(symval, input_device_id, swbit); 705 706 ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype); 707 ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor); 708 ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product); 709 ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version); 710 711 alias_append(alias, sizeof_alias, "-e*"); 712 if (flags & INPUT_DEVICE_ID_MATCH_EVBIT) 713 do_input(alias, sizeof_alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX); 714 alias_append(alias, sizeof_alias, "k*"); 715 if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT) 716 do_input(alias, sizeof_alias, *keybit, 717 INPUT_DEVICE_ID_KEY_MIN_INTERESTING, 718 INPUT_DEVICE_ID_KEY_MAX); 719 alias_append(alias, sizeof_alias, "r*"); 720 if (flags & INPUT_DEVICE_ID_MATCH_RELBIT) 721 do_input(alias, sizeof_alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX); 722 alias_append(alias, sizeof_alias, "a*"); 723 if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT) 724 do_input(alias, sizeof_alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX); 725 alias_append(alias, sizeof_alias, "m*"); 726 if (flags & INPUT_DEVICE_ID_MATCH_MSCIT) 727 do_input(alias, sizeof_alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX); 728 alias_append(alias, sizeof_alias, "l*"); 729 if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT) 730 do_input(alias, sizeof_alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX); 731 alias_append(alias, sizeof_alias, "s*"); 732 if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT) 733 do_input(alias, sizeof_alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX); 734 alias_append(alias, sizeof_alias, "f*"); 735 if (flags & INPUT_DEVICE_ID_MATCH_FFBIT) 736 do_input(alias, sizeof_alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX); 737 alias_append(alias, sizeof_alias, "w*"); 738 if (flags & INPUT_DEVICE_ID_MATCH_SWBIT) 739 do_input(alias, sizeof_alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX); 740 741 module_alias_printf(mod, false, "input:%s", alias); 742 } 743 744 static void do_eisa_entry(struct module *mod, void *symval) 745 { 746 DEF_FIELD_ADDR(symval, eisa_device_id, sig); 747 module_alias_printf(mod, false, EISA_DEVICE_MODALIAS_FMT "*", *sig); 748 } 749 750 /* Looks like: parisc:tNhvNrevNsvN */ 751 static void do_parisc_entry(struct module *mod, void *symval) 752 { 753 char alias[256] = {}; 754 755 DEF_FIELD(symval, parisc_device_id, hw_type); 756 DEF_FIELD(symval, parisc_device_id, hversion); 757 DEF_FIELD(symval, parisc_device_id, hversion_rev); 758 DEF_FIELD(symval, parisc_device_id, sversion); 759 760 ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type); 761 ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion); 762 ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev); 763 ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion); 764 765 module_alias_printf(mod, true, "parisc:%s", alias); 766 } 767 768 /* Looks like: sdio:cNvNdN. */ 769 static void do_sdio_entry(struct module *mod, void *symval) 770 { 771 char alias[256] = {}; 772 773 DEF_FIELD(symval, sdio_device_id, class); 774 DEF_FIELD(symval, sdio_device_id, vendor); 775 DEF_FIELD(symval, sdio_device_id, device); 776 777 ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class); 778 ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor); 779 ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device); 780 781 module_alias_printf(mod, true, "sdio:%s", alias); 782 } 783 784 /* Looks like: ssb:vNidNrevN. */ 785 static void do_ssb_entry(struct module *mod, void *symval) 786 { 787 char alias[256] = {}; 788 789 DEF_FIELD(symval, ssb_device_id, vendor); 790 DEF_FIELD(symval, ssb_device_id, coreid); 791 DEF_FIELD(symval, ssb_device_id, revision); 792 793 ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor); 794 ADD(alias, "id", coreid != SSB_ANY_ID, coreid); 795 ADD(alias, "rev", revision != SSB_ANY_REV, revision); 796 797 module_alias_printf(mod, true, "ssb:%s", alias); 798 } 799 800 /* Looks like: bcma:mNidNrevNclN. */ 801 static void do_bcma_entry(struct module *mod, void *symval) 802 { 803 char alias[256] = {}; 804 805 DEF_FIELD(symval, bcma_device_id, manuf); 806 DEF_FIELD(symval, bcma_device_id, id); 807 DEF_FIELD(symval, bcma_device_id, rev); 808 DEF_FIELD(symval, bcma_device_id, class); 809 810 ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf); 811 ADD(alias, "id", id != BCMA_ANY_ID, id); 812 ADD(alias, "rev", rev != BCMA_ANY_REV, rev); 813 ADD(alias, "cl", class != BCMA_ANY_CLASS, class); 814 815 module_alias_printf(mod, true, "bcma:%s", alias); 816 } 817 818 /* Looks like: virtio:dNvN */ 819 static void do_virtio_entry(struct module *mod, void *symval) 820 { 821 char alias[256] = {}; 822 823 DEF_FIELD(symval, virtio_device_id, device); 824 DEF_FIELD(symval, virtio_device_id, vendor); 825 826 ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device); 827 ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor); 828 829 module_alias_printf(mod, true, "virtio:%s", alias); 830 } 831 832 /* 833 * Looks like: vmbus:guid 834 * Each byte of the guid will be represented by two hex characters 835 * in the name. 836 */ 837 static void do_vmbus_entry(struct module *mod, void *symval) 838 { 839 DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid); 840 char guid_name[sizeof(*guid) * 2 + 1]; 841 842 for (int i = 0; i < sizeof(*guid); i++) 843 sprintf(&guid_name[i * 2], "%02x", guid->b[i]); 844 845 module_alias_printf(mod, false, "vmbus:%s", guid_name); 846 } 847 848 /* Looks like: rpmsg:S */ 849 static void do_rpmsg_entry(struct module *mod, void *symval) 850 { 851 DEF_FIELD_ADDR(symval, rpmsg_device_id, name); 852 853 module_alias_printf(mod, false, RPMSG_DEVICE_MODALIAS_FMT, *name); 854 } 855 856 /* Looks like: scmi:NN:S */ 857 static void do_scmi_entry(struct module *mod, void *symval) 858 { 859 DEF_FIELD(symval, scmi_device_id, protocol_id); 860 DEF_FIELD_ADDR(symval, scmi_device_id, name); 861 862 module_alias_printf(mod, false, SCMI_MODULE_PREFIX "%02x:%s", 863 protocol_id, *name); 864 } 865 866 /* Looks like: i2c:S */ 867 static void do_i2c_entry(struct module *mod, void *symval) 868 { 869 DEF_FIELD_ADDR(symval, i2c_device_id, name); 870 871 module_alias_printf(mod, false, I2C_MODULE_PREFIX "%s", *name); 872 } 873 874 static void do_i3c_entry(struct module *mod, void *symval) 875 { 876 char alias[256] = {}; 877 878 DEF_FIELD(symval, i3c_device_id, match_flags); 879 DEF_FIELD(symval, i3c_device_id, dcr); 880 DEF_FIELD(symval, i3c_device_id, manuf_id); 881 DEF_FIELD(symval, i3c_device_id, part_id); 882 DEF_FIELD(symval, i3c_device_id, extra_info); 883 884 ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr); 885 ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id); 886 ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id); 887 ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info); 888 889 module_alias_printf(mod, false, "i3c:%s", alias); 890 } 891 892 static void do_slim_entry(struct module *mod, void *symval) 893 { 894 DEF_FIELD(symval, slim_device_id, manf_id); 895 DEF_FIELD(symval, slim_device_id, prod_code); 896 897 module_alias_printf(mod, false, "slim:%x:%x:*", manf_id, prod_code); 898 } 899 900 /* Looks like: spi:S */ 901 static void do_spi_entry(struct module *mod, void *symval) 902 { 903 DEF_FIELD_ADDR(symval, spi_device_id, name); 904 905 module_alias_printf(mod, false, SPI_MODULE_PREFIX "%s", *name); 906 } 907 908 static const struct dmifield { 909 const char *prefix; 910 int field; 911 } dmi_fields[] = { 912 { "bvn", DMI_BIOS_VENDOR }, 913 { "bvr", DMI_BIOS_VERSION }, 914 { "bd", DMI_BIOS_DATE }, 915 { "br", DMI_BIOS_RELEASE }, 916 { "efr", DMI_EC_FIRMWARE_RELEASE }, 917 { "svn", DMI_SYS_VENDOR }, 918 { "pn", DMI_PRODUCT_NAME }, 919 { "pvr", DMI_PRODUCT_VERSION }, 920 { "rvn", DMI_BOARD_VENDOR }, 921 { "rn", DMI_BOARD_NAME }, 922 { "rvr", DMI_BOARD_VERSION }, 923 { "cvn", DMI_CHASSIS_VENDOR }, 924 { "ct", DMI_CHASSIS_TYPE }, 925 { "cvr", DMI_CHASSIS_VERSION }, 926 { NULL, DMI_NONE } 927 }; 928 929 static void dmi_ascii_filter(char *d, size_t avail, const char *s) 930 { 931 /* Filter out characters we don't want to see in the modalias string */ 932 for (; *s; s++) 933 if (*s > ' ' && *s < 127 && *s != ':') { 934 if (avail <= 1) 935 fatal("%s: alias buffer overflow\n", __func__); 936 *(d++) = *s; 937 avail--; 938 } 939 940 *d = 0; 941 } 942 943 944 static void do_dmi_entry(struct module *mod, void *symval) 945 { 946 char alias[256] = {}; 947 const size_t sizeof_alias = sizeof(alias); 948 size_t len; 949 int i, j; 950 DEF_FIELD_ADDR(symval, dmi_system_id, matches); 951 952 for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) { 953 for (j = 0; j < 4; j++) { 954 if ((*matches)[j].slot && 955 (*matches)[j].slot == dmi_fields[i].field) { 956 alias_append(alias, sizeof_alias, ":%s*", 957 dmi_fields[i].prefix); 958 len = strlen(alias); 959 dmi_ascii_filter(alias + len, sizeof_alias - len, 960 (*matches)[j].substr); 961 alias_append(alias, sizeof_alias, "*"); 962 } 963 } 964 } 965 966 module_alias_printf(mod, false, "dmi*%s:", alias); 967 } 968 969 static void do_platform_entry(struct module *mod, void *symval) 970 { 971 DEF_FIELD_ADDR(symval, platform_device_id, name); 972 973 module_alias_printf(mod, false, PLATFORM_MODULE_PREFIX "%s", *name); 974 } 975 976 static void do_mdio_entry(struct module *mod, void *symval) 977 { 978 char id[33]; 979 int i; 980 DEF_FIELD(symval, mdio_device_id, phy_id); 981 DEF_FIELD(symval, mdio_device_id, phy_id_mask); 982 983 for (i = 0; i < 32; i++) { 984 if (!((phy_id_mask >> (31-i)) & 1)) 985 id[i] = '?'; 986 else if ((phy_id >> (31-i)) & 1) 987 id[i] = '1'; 988 else 989 id[i] = '0'; 990 } 991 992 /* Terminate the string */ 993 id[32] = '\0'; 994 995 module_alias_printf(mod, false, MDIO_MODULE_PREFIX "%s", id); 996 } 997 998 /* Looks like: zorro:iN. */ 999 static void do_zorro_entry(struct module *mod, void *symval) 1000 { 1001 char alias[256] = {}; 1002 DEF_FIELD(symval, zorro_device_id, id); 1003 1004 ADD(alias, "i", id != ZORRO_WILDCARD, id); 1005 1006 module_alias_printf(mod, false, "zorro:%s", alias); 1007 } 1008 1009 /* looks like: "pnp:dD" */ 1010 static void do_isapnp_entry(struct module *mod, void *symval) 1011 { 1012 DEF_FIELD(symval, isapnp_device_id, vendor); 1013 DEF_FIELD(symval, isapnp_device_id, function); 1014 module_alias_printf(mod, false, "pnp:d%c%c%c%x%x%x%x*", 1015 'A' + ((vendor >> 2) & 0x3f) - 1, 1016 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, 1017 'A' + ((vendor >> 8) & 0x1f) - 1, 1018 (function >> 4) & 0x0f, function & 0x0f, 1019 (function >> 12) & 0x0f, (function >> 8) & 0x0f); 1020 } 1021 1022 /* Looks like: "ipack:fNvNdN". */ 1023 static void do_ipack_entry(struct module *mod, void *symval) 1024 { 1025 char alias[256] = {}; 1026 DEF_FIELD(symval, ipack_device_id, format); 1027 DEF_FIELD(symval, ipack_device_id, vendor); 1028 DEF_FIELD(symval, ipack_device_id, device); 1029 1030 ADD(alias, "f", format != IPACK_ANY_FORMAT, format); 1031 ADD(alias, "v", vendor != IPACK_ANY_ID, vendor); 1032 ADD(alias, "d", device != IPACK_ANY_ID, device); 1033 1034 module_alias_printf(mod, true, "ipack:%s", alias); 1035 } 1036 1037 /* 1038 * Append a match expression for a single masked hex digit. 1039 * outp points to a pointer to the character at which to append. 1040 * *outp is updated on return to point just after the appended text, 1041 * to facilitate further appending. 1042 */ 1043 static void append_nibble_mask(char **outp, 1044 unsigned int nibble, unsigned int mask) 1045 { 1046 char *p = *outp; 1047 unsigned int i; 1048 1049 switch (mask) { 1050 case 0: 1051 *p++ = '?'; 1052 break; 1053 1054 case 0xf: 1055 p += sprintf(p, "%X", nibble); 1056 break; 1057 1058 default: 1059 /* 1060 * Dumbly emit a match pattern for all possible matching 1061 * digits. This could be improved in some cases using ranges, 1062 * but it has the advantage of being trivially correct, and is 1063 * often optimal. 1064 */ 1065 *p++ = '['; 1066 for (i = 0; i < 0x10; i++) 1067 if ((i & mask) == nibble) 1068 p += sprintf(p, "%X", i); 1069 *p++ = ']'; 1070 } 1071 1072 /* Ensure that the string remains NUL-terminated: */ 1073 *p = '\0'; 1074 1075 /* Advance the caller's end-of-string pointer: */ 1076 *outp = p; 1077 } 1078 1079 /* 1080 * looks like: "amba:dN" 1081 * 1082 * N is exactly 8 digits, where each is an upper-case hex digit, or 1083 * a ? or [] pattern matching exactly one digit. 1084 */ 1085 static void do_amba_entry(struct module *mod, void *symval) 1086 { 1087 char alias[256]; 1088 unsigned int digit; 1089 char *p = alias; 1090 DEF_FIELD(symval, amba_id, id); 1091 DEF_FIELD(symval, amba_id, mask); 1092 1093 if ((id & mask) != id) 1094 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: id=0x%08X, mask=0x%08X. Please fix this driver.\n", 1095 mod->name, id, mask); 1096 1097 for (digit = 0; digit < 8; digit++) 1098 append_nibble_mask(&p, 1099 (id >> (4 * (7 - digit))) & 0xf, 1100 (mask >> (4 * (7 - digit))) & 0xf); 1101 1102 module_alias_printf(mod, false, "amba:d%s", alias); 1103 } 1104 1105 /* 1106 * looks like: "mipscdmm:tN" 1107 * 1108 * N is exactly 2 digits, where each is an upper-case hex digit, or 1109 * a ? or [] pattern matching exactly one digit. 1110 */ 1111 static void do_mips_cdmm_entry(struct module *mod, void *symval) 1112 { 1113 DEF_FIELD(symval, mips_cdmm_device_id, type); 1114 1115 module_alias_printf(mod, false, "mipscdmm:t%02X*", type); 1116 } 1117 1118 /* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,* 1119 * All fields are numbers. It would be nicer to use strings for vendor 1120 * and feature, but getting those out of the build system here is too 1121 * complicated. 1122 */ 1123 1124 static void do_x86cpu_entry(struct module *mod, void *symval) 1125 { 1126 char alias[256] = {}; 1127 1128 DEF_FIELD(symval, x86_cpu_id, feature); 1129 DEF_FIELD(symval, x86_cpu_id, family); 1130 DEF_FIELD(symval, x86_cpu_id, model); 1131 DEF_FIELD(symval, x86_cpu_id, vendor); 1132 1133 ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor); 1134 ADD(alias, "fam", family != X86_FAMILY_ANY, family); 1135 ADD(alias, "mod", model != X86_MODEL_ANY, model); 1136 strcat(alias, ":feature:*"); 1137 if (feature != X86_FEATURE_ANY) 1138 sprintf(alias + strlen(alias), "%04X*", feature); 1139 1140 module_alias_printf(mod, false, "cpu:type:x86,%s", alias); 1141 } 1142 1143 /* LOOKS like cpu:type:*:feature:*FEAT* */ 1144 static void do_cpu_entry(struct module *mod, void *symval) 1145 { 1146 DEF_FIELD(symval, cpu_feature, feature); 1147 1148 module_alias_printf(mod, false, "cpu:type:*:feature:*%04X*", feature); 1149 } 1150 1151 /* Looks like: mcb:16zN */ 1152 static void do_mcb_entry(struct module *mod, void *symval) 1153 { 1154 DEF_FIELD(symval, mcb_device_id, device); 1155 1156 module_alias_printf(mod, false, "mcb:16z%03d", device); 1157 } 1158 1159 /* Looks like: mei:S:uuid:N:* */ 1160 static void do_mei_entry(struct module *mod, void *symval) 1161 { 1162 char alias[256] = {}; 1163 1164 DEF_FIELD_ADDR(symval, mei_cl_device_id, name); 1165 DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid); 1166 DEF_FIELD(symval, mei_cl_device_id, version); 1167 1168 add_uuid(alias, *uuid); 1169 ADD(alias, ":", version != MEI_CL_VERSION_ANY, version); 1170 1171 module_alias_printf(mod, false, MEI_CL_MODULE_PREFIX "%s:%s:*", 1172 (*name)[0] ? *name : "*", alias); 1173 } 1174 1175 /* Looks like: rapidio:vNdNavNadN */ 1176 static void do_rio_entry(struct module *mod, void *symval) 1177 { 1178 char alias[256] = {}; 1179 1180 DEF_FIELD(symval, rio_device_id, did); 1181 DEF_FIELD(symval, rio_device_id, vid); 1182 DEF_FIELD(symval, rio_device_id, asm_did); 1183 DEF_FIELD(symval, rio_device_id, asm_vid); 1184 1185 ADD(alias, "v", vid != RIO_ANY_ID, vid); 1186 ADD(alias, "d", did != RIO_ANY_ID, did); 1187 ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid); 1188 ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did); 1189 1190 module_alias_printf(mod, true, "rapidio:%s", alias); 1191 } 1192 1193 /* Looks like: ulpi:vNpN */ 1194 static void do_ulpi_entry(struct module *mod, void *symval) 1195 { 1196 DEF_FIELD(symval, ulpi_device_id, vendor); 1197 DEF_FIELD(symval, ulpi_device_id, product); 1198 1199 module_alias_printf(mod, false, "ulpi:v%04xp%04x", vendor, product); 1200 } 1201 1202 /* Looks like: hdaudio:vNrNaN */ 1203 static void do_hda_entry(struct module *mod, void *symval) 1204 { 1205 char alias[256] = {}; 1206 1207 DEF_FIELD(symval, hda_device_id, vendor_id); 1208 DEF_FIELD(symval, hda_device_id, rev_id); 1209 DEF_FIELD(symval, hda_device_id, api_version); 1210 1211 ADD(alias, "v", vendor_id != 0, vendor_id); 1212 ADD(alias, "r", rev_id != 0, rev_id); 1213 ADD(alias, "a", api_version != 0, api_version); 1214 1215 module_alias_printf(mod, true, "hdaudio:%s", alias); 1216 } 1217 1218 /* Looks like: sdw:mNpNvNcN */ 1219 static void do_sdw_entry(struct module *mod, void *symval) 1220 { 1221 char alias[256] = {}; 1222 1223 DEF_FIELD(symval, sdw_device_id, mfg_id); 1224 DEF_FIELD(symval, sdw_device_id, part_id); 1225 DEF_FIELD(symval, sdw_device_id, sdw_version); 1226 DEF_FIELD(symval, sdw_device_id, class_id); 1227 1228 ADD(alias, "m", mfg_id != 0, mfg_id); 1229 ADD(alias, "p", part_id != 0, part_id); 1230 ADD(alias, "v", sdw_version != 0, sdw_version); 1231 ADD(alias, "c", class_id != 0, class_id); 1232 1233 module_alias_printf(mod, true, "sdw:%s", alias); 1234 } 1235 1236 /* Looks like: fsl-mc:vNdN */ 1237 static void do_fsl_mc_entry(struct module *mod, void *symval) 1238 { 1239 DEF_FIELD(symval, fsl_mc_device_id, vendor); 1240 DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type); 1241 1242 module_alias_printf(mod, false, "fsl-mc:v%08Xd%s", vendor, *obj_type); 1243 } 1244 1245 /* Looks like: tbsvc:kSpNvNrN */ 1246 static void do_tbsvc_entry(struct module *mod, void *symval) 1247 { 1248 char alias[256] = {}; 1249 1250 DEF_FIELD(symval, tb_service_id, match_flags); 1251 DEF_FIELD_ADDR(symval, tb_service_id, protocol_key); 1252 DEF_FIELD(symval, tb_service_id, protocol_id); 1253 DEF_FIELD(symval, tb_service_id, protocol_version); 1254 DEF_FIELD(symval, tb_service_id, protocol_revision); 1255 1256 if (match_flags & TBSVC_MATCH_PROTOCOL_KEY) 1257 sprintf(alias + strlen(alias), "k%s", *protocol_key); 1258 else 1259 strcat(alias + strlen(alias), "k*"); 1260 ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id); 1261 ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION, 1262 protocol_version); 1263 ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION, 1264 protocol_revision); 1265 1266 module_alias_printf(mod, true, "tbsvc:%s", alias); 1267 } 1268 1269 /* Looks like: typec:idN */ 1270 static void do_typec_entry(struct module *mod, void *symval) 1271 { 1272 DEF_FIELD(symval, typec_device_id, svid); 1273 1274 module_alias_printf(mod, false, "typec:id%04X", svid); 1275 } 1276 1277 /* Looks like: tee:uuid */ 1278 static void do_tee_entry(struct module *mod, void *symval) 1279 { 1280 DEF_FIELD_ADDR(symval, tee_client_device_id, uuid); 1281 1282 module_alias_printf(mod, true, 1283 "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", 1284 uuid->b[0], uuid->b[1], uuid->b[2], uuid->b[3], uuid->b[4], 1285 uuid->b[5], uuid->b[6], uuid->b[7], uuid->b[8], uuid->b[9], 1286 uuid->b[10], uuid->b[11], uuid->b[12], uuid->b[13], uuid->b[14], 1287 uuid->b[15]); 1288 } 1289 1290 /* Looks like: wmi:guid */ 1291 static void do_wmi_entry(struct module *mod, void *symval) 1292 { 1293 DEF_FIELD_ADDR(symval, wmi_device_id, guid_string); 1294 char result[sizeof(*guid_string)]; 1295 int i; 1296 1297 if (strlen(*guid_string) != UUID_STRING_LEN) { 1298 warn("Invalid WMI device id 'wmi:%s' in '%s'\n", 1299 *guid_string, mod->name); 1300 return; 1301 } 1302 1303 for (i = 0; i < UUID_STRING_LEN; i++) { 1304 char value = (*guid_string)[i]; 1305 bool valid = false; 1306 1307 if (i == 8 || i == 13 || i == 18 || i == 23) { 1308 if (value == '-') 1309 valid = true; 1310 } else { 1311 if (isxdigit(value)) 1312 valid = true; 1313 } 1314 1315 if (!valid) { 1316 warn("Invalid character %c inside WMI GUID string '%s' in '%s'\n", 1317 value, *guid_string, mod->name); 1318 return; 1319 } 1320 1321 /* Some GUIDs from BMOF definitions contain lowercase characters */ 1322 result[i] = toupper(value); 1323 } 1324 1325 result[i] = '\0'; 1326 1327 module_alias_printf(mod, false, WMI_MODULE_PREFIX "%s", result); 1328 } 1329 1330 /* Looks like: mhi:S */ 1331 static void do_mhi_entry(struct module *mod, void *symval) 1332 { 1333 DEF_FIELD_ADDR(symval, mhi_device_id, chan); 1334 module_alias_printf(mod, false, MHI_DEVICE_MODALIAS_FMT, *chan); 1335 } 1336 1337 /* Looks like: mhi_ep:S */ 1338 static void do_mhi_ep_entry(struct module *mod, void *symval) 1339 { 1340 DEF_FIELD_ADDR(symval, mhi_device_id, chan); 1341 1342 module_alias_printf(mod, false, MHI_EP_DEVICE_MODALIAS_FMT, *chan); 1343 } 1344 1345 /* Looks like: ishtp:{guid} */ 1346 static void do_ishtp_entry(struct module *mod, void *symval) 1347 { 1348 char alias[256] = {}; 1349 DEF_FIELD_ADDR(symval, ishtp_device_id, guid); 1350 1351 add_guid(alias, *guid); 1352 1353 module_alias_printf(mod, false, ISHTP_MODULE_PREFIX "{%s}", alias); 1354 } 1355 1356 static void do_auxiliary_entry(struct module *mod, void *symval) 1357 { 1358 DEF_FIELD_ADDR(symval, auxiliary_device_id, name); 1359 1360 module_alias_printf(mod, false, AUXILIARY_MODULE_PREFIX "%s", *name); 1361 } 1362 1363 static void do_arm_smccc_entry(struct module *mod, void *symval) 1364 { 1365 DEF_FIELD(symval, arm_smccc_device_id, func_id); 1366 1367 module_alias_printf(mod, false, ARM_SMCCC_MODULE_PREFIX "f%08X", func_id); 1368 } 1369 1370 /* 1371 * Looks like: ssam:dNcNtNiNfN 1372 * 1373 * N is exactly 2 digits, where each is an upper-case hex digit. 1374 */ 1375 static void do_ssam_entry(struct module *mod, void *symval) 1376 { 1377 char alias[256] = {}; 1378 1379 DEF_FIELD(symval, ssam_device_id, match_flags); 1380 DEF_FIELD(symval, ssam_device_id, domain); 1381 DEF_FIELD(symval, ssam_device_id, category); 1382 DEF_FIELD(symval, ssam_device_id, target); 1383 DEF_FIELD(symval, ssam_device_id, instance); 1384 DEF_FIELD(symval, ssam_device_id, function); 1385 1386 ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target); 1387 ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance); 1388 ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function); 1389 1390 module_alias_printf(mod, false, "ssam:d%02Xc%02X%s", 1391 domain, category, alias); 1392 } 1393 1394 /* Looks like: dfl:tNfN */ 1395 static void do_dfl_entry(struct module *mod, void *symval) 1396 { 1397 DEF_FIELD(symval, dfl_device_id, type); 1398 DEF_FIELD(symval, dfl_device_id, feature_id); 1399 1400 module_alias_printf(mod, true, "dfl:t%04Xf%04X", type, feature_id); 1401 } 1402 1403 /* Looks like: cdx:vNdN */ 1404 static void do_cdx_entry(struct module *mod, void *symval) 1405 { 1406 char alias[256]; 1407 1408 DEF_FIELD(symval, cdx_device_id, vendor); 1409 DEF_FIELD(symval, cdx_device_id, device); 1410 DEF_FIELD(symval, cdx_device_id, subvendor); 1411 DEF_FIELD(symval, cdx_device_id, subdevice); 1412 DEF_FIELD(symval, cdx_device_id, class); 1413 DEF_FIELD(symval, cdx_device_id, class_mask); 1414 DEF_FIELD(symval, cdx_device_id, override_only); 1415 1416 switch (override_only) { 1417 case 0: 1418 strcpy(alias, "cdx:"); 1419 break; 1420 case CDX_ID_F_VFIO_DRIVER_OVERRIDE: 1421 strcpy(alias, "vfio_cdx:"); 1422 break; 1423 default: 1424 warn("Unknown CDX driver_override alias %08X\n", 1425 override_only); 1426 return; 1427 } 1428 1429 ADD(alias, "v", vendor != CDX_ANY_ID, vendor); 1430 ADD(alias, "d", device != CDX_ANY_ID, device); 1431 ADD(alias, "sv", subvendor != CDX_ANY_ID, subvendor); 1432 ADD(alias, "sd", subdevice != CDX_ANY_ID, subdevice); 1433 ADD(alias, "c", class_mask == 0xFFFFFF, class); 1434 1435 module_alias_printf(mod, false, "%s", alias); 1436 } 1437 1438 static void do_vchiq_entry(struct module *mod, void *symval) 1439 { 1440 DEF_FIELD_ADDR(symval, vchiq_device_id, name); 1441 1442 module_alias_printf(mod, false, "vchiq:%s", *name); 1443 } 1444 1445 /* Looks like: coreboot:tN */ 1446 static void do_coreboot_entry(struct module *mod, void *symval) 1447 { 1448 DEF_FIELD(symval, coreboot_device_id, tag); 1449 1450 module_alias_printf(mod, false, "coreboot:t%08X", tag); 1451 } 1452 1453 /* Does namelen bytes of name exactly match the symbol? */ 1454 static bool sym_is(const char *name, unsigned namelen, const char *symbol) 1455 { 1456 if (namelen != strlen(symbol)) 1457 return false; 1458 1459 return memcmp(name, symbol, namelen) == 0; 1460 } 1461 1462 static void do_table(const char *name, void *symval, unsigned long size, 1463 unsigned long id_size, 1464 const char *device_id, 1465 void (*do_entry)(struct module *mod, void *symval), 1466 struct module *mod) 1467 { 1468 unsigned int i; 1469 1470 if (size % id_size || size < id_size) { 1471 error("%s: type mismatch between %s[] and MODULE_DEVICE_TABLE(%s, ...)\n", 1472 mod->name, name, device_id); 1473 return; 1474 } 1475 1476 /* Verify the last entry is a terminator */ 1477 for (i = size - id_size; i < size; i++) { 1478 if (*(uint8_t *)(symval + i)) { 1479 error("%s: %s[] is not terminated with a NULL entry\n", 1480 mod->name, name); 1481 return; 1482 } 1483 } 1484 1485 /* Leave last one: it's the terminator. */ 1486 size -= id_size; 1487 1488 for (i = 0; i < size; i += id_size) 1489 do_entry(mod, symval + i); 1490 } 1491 1492 static const struct devtable devtable[] = { 1493 {"hid", SIZE_hid_device_id, do_hid_entry}, 1494 {"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry}, 1495 {"pci", SIZE_pci_device_id, do_pci_entry}, 1496 {"ccw", SIZE_ccw_device_id, do_ccw_entry}, 1497 {"ap", SIZE_ap_device_id, do_ap_entry}, 1498 {"css", SIZE_css_device_id, do_css_entry}, 1499 {"serio", SIZE_serio_device_id, do_serio_entry}, 1500 {"acpi", SIZE_acpi_device_id, do_acpi_entry}, 1501 {"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry}, 1502 {"vio", SIZE_vio_device_id, do_vio_entry}, 1503 {"input", SIZE_input_device_id, do_input_entry}, 1504 {"eisa", SIZE_eisa_device_id, do_eisa_entry}, 1505 {"parisc", SIZE_parisc_device_id, do_parisc_entry}, 1506 {"sdio", SIZE_sdio_device_id, do_sdio_entry}, 1507 {"ssb", SIZE_ssb_device_id, do_ssb_entry}, 1508 {"bcma", SIZE_bcma_device_id, do_bcma_entry}, 1509 {"virtio", SIZE_virtio_device_id, do_virtio_entry}, 1510 {"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry}, 1511 {"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry}, 1512 {"scmi", SIZE_scmi_device_id, do_scmi_entry}, 1513 {"i2c", SIZE_i2c_device_id, do_i2c_entry}, 1514 {"i3c", SIZE_i3c_device_id, do_i3c_entry}, 1515 {"slim", SIZE_slim_device_id, do_slim_entry}, 1516 {"spi", SIZE_spi_device_id, do_spi_entry}, 1517 {"dmi", SIZE_dmi_system_id, do_dmi_entry}, 1518 {"platform", SIZE_platform_device_id, do_platform_entry}, 1519 {"mdio", SIZE_mdio_device_id, do_mdio_entry}, 1520 {"zorro", SIZE_zorro_device_id, do_zorro_entry}, 1521 {"isapnp", SIZE_isapnp_device_id, do_isapnp_entry}, 1522 {"ipack", SIZE_ipack_device_id, do_ipack_entry}, 1523 {"amba", SIZE_amba_id, do_amba_entry}, 1524 {"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry}, 1525 {"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry}, 1526 {"cpu", SIZE_cpu_feature, do_cpu_entry}, 1527 {"mcb", SIZE_mcb_device_id, do_mcb_entry}, 1528 {"mei", SIZE_mei_cl_device_id, do_mei_entry}, 1529 {"rapidio", SIZE_rio_device_id, do_rio_entry}, 1530 {"ulpi", SIZE_ulpi_device_id, do_ulpi_entry}, 1531 {"hdaudio", SIZE_hda_device_id, do_hda_entry}, 1532 {"sdw", SIZE_sdw_device_id, do_sdw_entry}, 1533 {"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry}, 1534 {"tbsvc", SIZE_tb_service_id, do_tbsvc_entry}, 1535 {"typec", SIZE_typec_device_id, do_typec_entry}, 1536 {"tee", SIZE_tee_client_device_id, do_tee_entry}, 1537 {"wmi", SIZE_wmi_device_id, do_wmi_entry}, 1538 {"mhi", SIZE_mhi_device_id, do_mhi_entry}, 1539 {"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry}, 1540 {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry}, 1541 {"arm_smccc", SIZE_arm_smccc_device_id, do_arm_smccc_entry}, 1542 {"ssam", SIZE_ssam_device_id, do_ssam_entry}, 1543 {"dfl", SIZE_dfl_device_id, do_dfl_entry}, 1544 {"ishtp", SIZE_ishtp_device_id, do_ishtp_entry}, 1545 {"cdx", SIZE_cdx_device_id, do_cdx_entry}, 1546 {"vchiq", SIZE_vchiq_device_id, do_vchiq_entry}, 1547 {"coreboot", SIZE_coreboot_device_id, do_coreboot_entry}, 1548 {"of", SIZE_of_device_id, do_of_entry}, 1549 {"usb", SIZE_usb_device_id, do_usb_entry_multi}, 1550 {"pnp", SIZE_pnp_device_id, do_pnp_device_entry}, 1551 {"pnp_card", SIZE_pnp_card_device_id, do_pnp_card_entry}, 1552 }; 1553 1554 /* Create MODULE_ALIAS() statements. 1555 * At this time, we cannot write the actual output C source yet, 1556 * so we write into the mod->dev_table_buf buffer. */ 1557 void handle_moddevtable(struct module *mod, struct elf_info *info, 1558 Elf_Sym *sym, const char *symname) 1559 { 1560 void *symval; 1561 char *zeros = NULL; 1562 const char *type, *name, *modname; 1563 size_t typelen, modnamelen; 1564 static const char *prefix = "__mod_device_table__"; 1565 1566 /* We're looking for a section relative symbol */ 1567 if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections) 1568 return; 1569 1570 /* We're looking for an object */ 1571 if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT) 1572 return; 1573 1574 /* All our symbols are of form __mod_device_table__kmod_<modname>__<type>__<name>. */ 1575 if (!strstarts(symname, prefix)) 1576 return; 1577 1578 modname = strstr(symname, "__kmod_"); 1579 if (!modname) 1580 return; 1581 modname += strlen("__kmod_"); 1582 1583 type = strstr(modname, "__"); 1584 if (!type) 1585 return; 1586 modnamelen = type - modname; 1587 type += strlen("__"); 1588 1589 name = strstr(type, "__"); 1590 if (!name) 1591 return; 1592 typelen = name - type; 1593 name += strlen("__"); 1594 1595 /* Handle all-NULL symbols allocated into .bss */ 1596 if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) { 1597 zeros = calloc(1, sym->st_size); 1598 symval = zeros; 1599 } else { 1600 symval = sym_get_data(info, sym); 1601 } 1602 1603 for (int i = 0; i < ARRAY_SIZE(devtable); i++) { 1604 const struct devtable *p = &devtable[i]; 1605 1606 if (sym_is(type, typelen, p->device_id)) { 1607 do_table(name, symval, sym->st_size, p->id_size, 1608 p->device_id, p->do_entry, mod); 1609 break; 1610 } 1611 } 1612 1613 if (mod->is_vmlinux) { 1614 struct module_alias *alias; 1615 1616 /* 1617 * If this is vmlinux, record the name of the builtin module. 1618 * Traverse the linked list in the reverse order, and set the 1619 * builtin_modname unless it has already been set in the 1620 * previous call. 1621 */ 1622 list_for_each_entry_reverse(alias, &mod->aliases, node) { 1623 if (alias->builtin_modname) 1624 break; 1625 alias->builtin_modname = xstrndup(modname, modnamelen); 1626 } 1627 } 1628 1629 free(zeros); 1630 } 1631