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