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 "modpost.h" 14 15 /* We use the ELF typedefs for kernel_ulong_t but bite the bullet and 16 * use either stdint.h or inttypes.h for the rest. */ 17 #if KERNEL_ELFCLASS == ELFCLASS32 18 typedef Elf32_Addr kernel_ulong_t; 19 #define BITS_PER_LONG 32 20 #else 21 typedef Elf64_Addr kernel_ulong_t; 22 #define BITS_PER_LONG 64 23 #endif 24 #ifdef __sun__ 25 #include <inttypes.h> 26 #else 27 #include <stdint.h> 28 #endif 29 30 #include <ctype.h> 31 #include <stdbool.h> 32 33 typedef uint32_t __u32; 34 typedef uint16_t __u16; 35 typedef unsigned char __u8; 36 37 /* Big exception to the "don't include kernel headers into userspace, which 38 * even potentially has different endianness and word sizes, since 39 * we handle those differences explicitly below */ 40 #include "../../include/linux/mod_devicetable.h" 41 42 /* This array collects all instances that use the generic do_table */ 43 struct devtable { 44 const char *device_id; /* name of table, __mod_<name>_device_table. */ 45 unsigned long id_size; 46 void *function; 47 }; 48 49 #define ___cat(a,b) a ## b 50 #define __cat(a,b) ___cat(a,b) 51 52 /* we need some special handling for this host tool running eventually on 53 * Darwin. The Mach-O section handling is a bit different than ELF section 54 * handling. The differnces in detail are: 55 * a) we have segments which have sections 56 * b) we need a API call to get the respective section symbols */ 57 #if defined(__MACH__) 58 #include <mach-o/getsect.h> 59 60 #define INIT_SECTION(name) do { \ 61 unsigned long name ## _len; \ 62 char *__cat(pstart_,name) = getsectdata("__TEXT", \ 63 #name, &__cat(name,_len)); \ 64 char *__cat(pstop_,name) = __cat(pstart_,name) + \ 65 __cat(name, _len); \ 66 __cat(__start_,name) = (void *)__cat(pstart_,name); \ 67 __cat(__stop_,name) = (void *)__cat(pstop_,name); \ 68 } while (0) 69 #define SECTION(name) __attribute__((section("__TEXT, " #name))) 70 71 struct devtable **__start___devtable, **__stop___devtable; 72 #else 73 #define INIT_SECTION(name) /* no-op for ELF */ 74 #define SECTION(name) __attribute__((section(#name))) 75 76 /* We construct a table of pointers in an ELF section (pointers generally 77 * go unpadded by gcc). ld creates boundary syms for us. */ 78 extern struct devtable *__start___devtable[], *__stop___devtable[]; 79 #endif /* __MACH__ */ 80 81 #if __GNUC__ == 3 && __GNUC_MINOR__ < 3 82 # define __used __attribute__((__unused__)) 83 #else 84 # define __used __attribute__((__used__)) 85 #endif 86 87 /* Add a table entry. We test function type matches while we're here. */ 88 #define ADD_TO_DEVTABLE(device_id, type, function) \ 89 static struct devtable __cat(devtable,__LINE__) = { \ 90 device_id + 0*sizeof((function)((const char *)NULL, \ 91 (type *)NULL, \ 92 (char *)NULL)), \ 93 sizeof(type), (function) }; \ 94 static struct devtable *SECTION(__devtable) __used \ 95 __cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__) 96 97 #define ADD(str, sep, cond, field) \ 98 do { \ 99 strcat(str, sep); \ 100 if (cond) \ 101 sprintf(str + strlen(str), \ 102 sizeof(field) == 1 ? "%02X" : \ 103 sizeof(field) == 2 ? "%04X" : \ 104 sizeof(field) == 4 ? "%08X" : "", \ 105 field); \ 106 else \ 107 sprintf(str + strlen(str), "*"); \ 108 } while(0) 109 110 /* Always end in a wildcard, for future extension */ 111 static inline void add_wildcard(char *str) 112 { 113 int len = strlen(str); 114 115 if (str[len - 1] != '*') 116 strcat(str + len, "*"); 117 } 118 119 unsigned int cross_build = 0; 120 /** 121 * Check that sizeof(device_id type) are consistent with size of section 122 * in .o file. If in-consistent then userspace and kernel does not agree 123 * on actual size which is a bug. 124 * Also verify that the final entry in the table is all zeros. 125 * Ignore both checks if build host differ from target host and size differs. 126 **/ 127 static void device_id_check(const char *modname, const char *device_id, 128 unsigned long size, unsigned long id_size, 129 void *symval) 130 { 131 int i; 132 133 if (size % id_size || size < id_size) { 134 if (cross_build != 0) 135 return; 136 fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo " 137 "of the size of section __mod_%s_device_table=%lu.\n" 138 "Fix definition of struct %s_device_id " 139 "in mod_devicetable.h\n", 140 modname, device_id, id_size, device_id, size, device_id); 141 } 142 /* Verify last one is a terminator */ 143 for (i = 0; i < id_size; i++ ) { 144 if (*(uint8_t*)(symval+size-id_size+i)) { 145 fprintf(stderr,"%s: struct %s_device_id is %lu bytes. " 146 "The last of %lu is:\n", 147 modname, device_id, id_size, size / id_size); 148 for (i = 0; i < id_size; i++ ) 149 fprintf(stderr,"0x%02x ", 150 *(uint8_t*)(symval+size-id_size+i) ); 151 fprintf(stderr,"\n"); 152 fatal("%s: struct %s_device_id is not terminated " 153 "with a NULL entry!\n", modname, device_id); 154 } 155 } 156 } 157 158 /* USB is special because the bcdDevice can be matched against a numeric range */ 159 /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */ 160 static void do_usb_entry(struct usb_device_id *id, 161 unsigned int bcdDevice_initial, int bcdDevice_initial_digits, 162 unsigned char range_lo, unsigned char range_hi, 163 unsigned char max, struct module *mod) 164 { 165 char alias[500]; 166 strcpy(alias, "usb:"); 167 ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR, 168 id->idVendor); 169 ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT, 170 id->idProduct); 171 172 strcat(alias, "d"); 173 if (bcdDevice_initial_digits) 174 sprintf(alias + strlen(alias), "%0*X", 175 bcdDevice_initial_digits, bcdDevice_initial); 176 if (range_lo == range_hi) 177 sprintf(alias + strlen(alias), "%X", range_lo); 178 else if (range_lo > 0 || range_hi < max) { 179 if (range_lo > 0x9 || range_hi < 0xA) 180 sprintf(alias + strlen(alias), 181 "[%X-%X]", 182 range_lo, 183 range_hi); 184 else { 185 sprintf(alias + strlen(alias), 186 range_lo < 0x9 ? "[%X-9" : "[%X", 187 range_lo); 188 sprintf(alias + strlen(alias), 189 range_hi > 0xA ? "a-%X]" : "%X]", 190 range_lo); 191 } 192 } 193 if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1)) 194 strcat(alias, "*"); 195 196 ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS, 197 id->bDeviceClass); 198 ADD(alias, "dsc", 199 id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS, 200 id->bDeviceSubClass); 201 ADD(alias, "dp", 202 id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL, 203 id->bDeviceProtocol); 204 ADD(alias, "ic", 205 id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS, 206 id->bInterfaceClass); 207 ADD(alias, "isc", 208 id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS, 209 id->bInterfaceSubClass); 210 ADD(alias, "ip", 211 id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL, 212 id->bInterfaceProtocol); 213 214 add_wildcard(alias); 215 buf_printf(&mod->dev_table_buf, 216 "MODULE_ALIAS(\"%s\");\n", alias); 217 } 218 219 /* Handles increment/decrement of BCD formatted integers */ 220 /* Returns the previous value, so it works like i++ or i-- */ 221 static unsigned int incbcd(unsigned int *bcd, 222 int inc, 223 unsigned char max, 224 size_t chars) 225 { 226 unsigned int init = *bcd, i, j; 227 unsigned long long c, dec = 0; 228 229 /* If bcd is not in BCD format, just increment */ 230 if (max > 0x9) { 231 *bcd += inc; 232 return init; 233 } 234 235 /* Convert BCD to Decimal */ 236 for (i=0 ; i < chars ; i++) { 237 c = (*bcd >> (i << 2)) & 0xf; 238 c = c > 9 ? 9 : c; /* force to bcd just in case */ 239 for (j=0 ; j < i ; j++) 240 c = c * 10; 241 dec += c; 242 } 243 244 /* Do our increment/decrement */ 245 dec += inc; 246 *bcd = 0; 247 248 /* Convert back to BCD */ 249 for (i=0 ; i < chars ; i++) { 250 for (c=1,j=0 ; j < i ; j++) 251 c = c * 10; 252 c = (dec / c) % 10; 253 *bcd += c << (i << 2); 254 } 255 return init; 256 } 257 258 static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod) 259 { 260 unsigned int devlo, devhi; 261 unsigned char chi, clo, max; 262 int ndigits; 263 264 id->match_flags = TO_NATIVE(id->match_flags); 265 id->idVendor = TO_NATIVE(id->idVendor); 266 id->idProduct = TO_NATIVE(id->idProduct); 267 268 devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ? 269 TO_NATIVE(id->bcdDevice_lo) : 0x0U; 270 devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ? 271 TO_NATIVE(id->bcdDevice_hi) : ~0x0U; 272 273 /* Figure out if this entry is in bcd or hex format */ 274 max = 0x9; /* Default to decimal format */ 275 for (ndigits = 0 ; ndigits < sizeof(id->bcdDevice_lo) * 2 ; ndigits++) { 276 clo = (devlo >> (ndigits << 2)) & 0xf; 277 chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf; 278 if (clo > max || chi > max) { 279 max = 0xf; 280 break; 281 } 282 } 283 284 /* 285 * Some modules (visor) have empty slots as placeholder for 286 * run-time specification that results in catch-all alias 287 */ 288 if (!(id->idVendor | id->idProduct | id->bDeviceClass | id->bInterfaceClass)) 289 return; 290 291 /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */ 292 for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) { 293 clo = devlo & 0xf; 294 chi = devhi & 0xf; 295 if (chi > max) /* If we are in bcd mode, truncate if necessary */ 296 chi = max; 297 devlo >>= 4; 298 devhi >>= 4; 299 300 if (devlo == devhi || !ndigits) { 301 do_usb_entry(id, devlo, ndigits, clo, chi, max, mod); 302 break; 303 } 304 305 if (clo > 0x0) 306 do_usb_entry(id, 307 incbcd(&devlo, 1, max, 308 sizeof(id->bcdDevice_lo) * 2), 309 ndigits, clo, max, max, mod); 310 311 if (chi < max) 312 do_usb_entry(id, 313 incbcd(&devhi, -1, max, 314 sizeof(id->bcdDevice_lo) * 2), 315 ndigits, 0x0, chi, max, mod); 316 } 317 } 318 319 static void do_usb_table(void *symval, unsigned long size, 320 struct module *mod) 321 { 322 unsigned int i; 323 const unsigned long id_size = sizeof(struct usb_device_id); 324 325 device_id_check(mod->name, "usb", size, id_size, symval); 326 327 /* Leave last one: it's the terminator. */ 328 size -= id_size; 329 330 for (i = 0; i < size; i += id_size) 331 do_usb_entry_multi(symval + i, mod); 332 } 333 334 /* Looks like: hid:bNvNpN */ 335 static int do_hid_entry(const char *filename, 336 struct hid_device_id *id, char *alias) 337 { 338 id->bus = TO_NATIVE(id->bus); 339 id->group = TO_NATIVE(id->group); 340 id->vendor = TO_NATIVE(id->vendor); 341 id->product = TO_NATIVE(id->product); 342 343 sprintf(alias, "hid:"); 344 ADD(alias, "b", id->bus != HID_BUS_ANY, id->bus); 345 ADD(alias, "g", id->group != HID_GROUP_ANY, id->group); 346 ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor); 347 ADD(alias, "p", id->product != HID_ANY_ID, id->product); 348 349 return 1; 350 } 351 ADD_TO_DEVTABLE("hid", struct hid_device_id, do_hid_entry); 352 353 /* Looks like: ieee1394:venNmoNspNverN */ 354 static int do_ieee1394_entry(const char *filename, 355 struct ieee1394_device_id *id, char *alias) 356 { 357 id->match_flags = TO_NATIVE(id->match_flags); 358 id->vendor_id = TO_NATIVE(id->vendor_id); 359 id->model_id = TO_NATIVE(id->model_id); 360 id->specifier_id = TO_NATIVE(id->specifier_id); 361 id->version = TO_NATIVE(id->version); 362 363 strcpy(alias, "ieee1394:"); 364 ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID, 365 id->vendor_id); 366 ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID, 367 id->model_id); 368 ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID, 369 id->specifier_id); 370 ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION, 371 id->version); 372 373 add_wildcard(alias); 374 return 1; 375 } 376 ADD_TO_DEVTABLE("ieee1394", struct ieee1394_device_id, do_ieee1394_entry); 377 378 /* Looks like: pci:vNdNsvNsdNbcNscNiN. */ 379 static int do_pci_entry(const char *filename, 380 struct pci_device_id *id, char *alias) 381 { 382 /* Class field can be divided into these three. */ 383 unsigned char baseclass, subclass, interface, 384 baseclass_mask, subclass_mask, interface_mask; 385 386 id->vendor = TO_NATIVE(id->vendor); 387 id->device = TO_NATIVE(id->device); 388 id->subvendor = TO_NATIVE(id->subvendor); 389 id->subdevice = TO_NATIVE(id->subdevice); 390 id->class = TO_NATIVE(id->class); 391 id->class_mask = TO_NATIVE(id->class_mask); 392 393 strcpy(alias, "pci:"); 394 ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor); 395 ADD(alias, "d", id->device != PCI_ANY_ID, id->device); 396 ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor); 397 ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice); 398 399 baseclass = (id->class) >> 16; 400 baseclass_mask = (id->class_mask) >> 16; 401 subclass = (id->class) >> 8; 402 subclass_mask = (id->class_mask) >> 8; 403 interface = id->class; 404 interface_mask = id->class_mask; 405 406 if ((baseclass_mask != 0 && baseclass_mask != 0xFF) 407 || (subclass_mask != 0 && subclass_mask != 0xFF) 408 || (interface_mask != 0 && interface_mask != 0xFF)) { 409 warn("Can't handle masks in %s:%04X\n", 410 filename, id->class_mask); 411 return 0; 412 } 413 414 ADD(alias, "bc", baseclass_mask == 0xFF, baseclass); 415 ADD(alias, "sc", subclass_mask == 0xFF, subclass); 416 ADD(alias, "i", interface_mask == 0xFF, interface); 417 add_wildcard(alias); 418 return 1; 419 } 420 ADD_TO_DEVTABLE("pci", struct pci_device_id, do_pci_entry); 421 422 /* looks like: "ccw:tNmNdtNdmN" */ 423 static int do_ccw_entry(const char *filename, 424 struct ccw_device_id *id, char *alias) 425 { 426 id->match_flags = TO_NATIVE(id->match_flags); 427 id->cu_type = TO_NATIVE(id->cu_type); 428 id->cu_model = TO_NATIVE(id->cu_model); 429 id->dev_type = TO_NATIVE(id->dev_type); 430 id->dev_model = TO_NATIVE(id->dev_model); 431 432 strcpy(alias, "ccw:"); 433 ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE, 434 id->cu_type); 435 ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL, 436 id->cu_model); 437 ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE, 438 id->dev_type); 439 ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL, 440 id->dev_model); 441 add_wildcard(alias); 442 return 1; 443 } 444 ADD_TO_DEVTABLE("ccw", struct ccw_device_id, do_ccw_entry); 445 446 /* looks like: "ap:tN" */ 447 static int do_ap_entry(const char *filename, 448 struct ap_device_id *id, char *alias) 449 { 450 sprintf(alias, "ap:t%02X*", id->dev_type); 451 return 1; 452 } 453 ADD_TO_DEVTABLE("ap", struct ap_device_id, do_ap_entry); 454 455 /* looks like: "css:tN" */ 456 static int do_css_entry(const char *filename, 457 struct css_device_id *id, char *alias) 458 { 459 sprintf(alias, "css:t%01X", id->type); 460 return 1; 461 } 462 ADD_TO_DEVTABLE("css", struct css_device_id, do_css_entry); 463 464 /* Looks like: "serio:tyNprNidNexN" */ 465 static int do_serio_entry(const char *filename, 466 struct serio_device_id *id, char *alias) 467 { 468 id->type = TO_NATIVE(id->type); 469 id->proto = TO_NATIVE(id->proto); 470 id->id = TO_NATIVE(id->id); 471 id->extra = TO_NATIVE(id->extra); 472 473 strcpy(alias, "serio:"); 474 ADD(alias, "ty", id->type != SERIO_ANY, id->type); 475 ADD(alias, "pr", id->proto != SERIO_ANY, id->proto); 476 ADD(alias, "id", id->id != SERIO_ANY, id->id); 477 ADD(alias, "ex", id->extra != SERIO_ANY, id->extra); 478 479 add_wildcard(alias); 480 return 1; 481 } 482 ADD_TO_DEVTABLE("serio", struct serio_device_id, do_serio_entry); 483 484 /* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */ 485 static int do_acpi_entry(const char *filename, 486 struct acpi_device_id *id, char *alias) 487 { 488 sprintf(alias, "acpi*:%s:*", id->id); 489 return 1; 490 } 491 ADD_TO_DEVTABLE("acpi", struct acpi_device_id, do_acpi_entry); 492 493 /* looks like: "pnp:dD" */ 494 static void do_pnp_device_entry(void *symval, unsigned long size, 495 struct module *mod) 496 { 497 const unsigned long id_size = sizeof(struct pnp_device_id); 498 const unsigned int count = (size / id_size)-1; 499 const struct pnp_device_id *devs = symval; 500 unsigned int i; 501 502 device_id_check(mod->name, "pnp", size, id_size, symval); 503 504 for (i = 0; i < count; i++) { 505 const char *id = (char *)devs[i].id; 506 char acpi_id[sizeof(devs[0].id)]; 507 int j; 508 509 buf_printf(&mod->dev_table_buf, 510 "MODULE_ALIAS(\"pnp:d%s*\");\n", id); 511 512 /* fix broken pnp bus lowercasing */ 513 for (j = 0; j < sizeof(acpi_id); j++) 514 acpi_id[j] = toupper(id[j]); 515 buf_printf(&mod->dev_table_buf, 516 "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id); 517 } 518 } 519 520 /* looks like: "pnp:dD" for every device of the card */ 521 static void do_pnp_card_entries(void *symval, unsigned long size, 522 struct module *mod) 523 { 524 const unsigned long id_size = sizeof(struct pnp_card_device_id); 525 const unsigned int count = (size / id_size)-1; 526 const struct pnp_card_device_id *cards = symval; 527 unsigned int i; 528 529 device_id_check(mod->name, "pnp", size, id_size, symval); 530 531 for (i = 0; i < count; i++) { 532 unsigned int j; 533 const struct pnp_card_device_id *card = &cards[i]; 534 535 for (j = 0; j < PNP_MAX_DEVICES; j++) { 536 const char *id = (char *)card->devs[j].id; 537 int i2, j2; 538 int dup = 0; 539 540 if (!id[0]) 541 break; 542 543 /* find duplicate, already added value */ 544 for (i2 = 0; i2 < i && !dup; i2++) { 545 const struct pnp_card_device_id *card2 = &cards[i2]; 546 547 for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) { 548 const char *id2 = (char *)card2->devs[j2].id; 549 550 if (!id2[0]) 551 break; 552 553 if (!strcmp(id, id2)) { 554 dup = 1; 555 break; 556 } 557 } 558 } 559 560 /* add an individual alias for every device entry */ 561 if (!dup) { 562 char acpi_id[sizeof(card->devs[0].id)]; 563 int k; 564 565 buf_printf(&mod->dev_table_buf, 566 "MODULE_ALIAS(\"pnp:d%s*\");\n", id); 567 568 /* fix broken pnp bus lowercasing */ 569 for (k = 0; k < sizeof(acpi_id); k++) 570 acpi_id[k] = toupper(id[k]); 571 buf_printf(&mod->dev_table_buf, 572 "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id); 573 } 574 } 575 } 576 } 577 578 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */ 579 static int do_pcmcia_entry(const char *filename, 580 struct pcmcia_device_id *id, char *alias) 581 { 582 unsigned int i; 583 584 id->match_flags = TO_NATIVE(id->match_flags); 585 id->manf_id = TO_NATIVE(id->manf_id); 586 id->card_id = TO_NATIVE(id->card_id); 587 id->func_id = TO_NATIVE(id->func_id); 588 id->function = TO_NATIVE(id->function); 589 id->device_no = TO_NATIVE(id->device_no); 590 591 for (i=0; i<4; i++) { 592 id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]); 593 } 594 595 strcpy(alias, "pcmcia:"); 596 ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID, 597 id->manf_id); 598 ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID, 599 id->card_id); 600 ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID, 601 id->func_id); 602 ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION, 603 id->function); 604 ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO, 605 id->device_no); 606 ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]); 607 ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]); 608 ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]); 609 ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]); 610 611 add_wildcard(alias); 612 return 1; 613 } 614 ADD_TO_DEVTABLE("pcmcia", struct pcmcia_device_id, do_pcmcia_entry); 615 616 static int do_of_entry (const char *filename, struct of_device_id *of, char *alias) 617 { 618 int len; 619 char *tmp; 620 len = sprintf (alias, "of:N%sT%s", 621 of->name[0] ? of->name : "*", 622 of->type[0] ? of->type : "*"); 623 624 if (of->compatible[0]) 625 sprintf (&alias[len], "%sC%s", 626 of->type[0] ? "*" : "", 627 of->compatible); 628 629 /* Replace all whitespace with underscores */ 630 for (tmp = alias; tmp && *tmp; tmp++) 631 if (isspace (*tmp)) 632 *tmp = '_'; 633 634 add_wildcard(alias); 635 return 1; 636 } 637 ADD_TO_DEVTABLE("of", struct of_device_id, do_of_entry); 638 639 static int do_vio_entry(const char *filename, struct vio_device_id *vio, 640 char *alias) 641 { 642 char *tmp; 643 644 sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*", 645 vio->compat[0] ? vio->compat : "*"); 646 647 /* Replace all whitespace with underscores */ 648 for (tmp = alias; tmp && *tmp; tmp++) 649 if (isspace (*tmp)) 650 *tmp = '_'; 651 652 add_wildcard(alias); 653 return 1; 654 } 655 ADD_TO_DEVTABLE("vio", struct vio_device_id, do_vio_entry); 656 657 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 658 659 static void do_input(char *alias, 660 kernel_ulong_t *arr, unsigned int min, unsigned int max) 661 { 662 unsigned int i; 663 664 for (i = min; i < max; i++) 665 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG))) 666 sprintf(alias + strlen(alias), "%X,*", i); 667 } 668 669 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */ 670 static int do_input_entry(const char *filename, struct input_device_id *id, 671 char *alias) 672 { 673 sprintf(alias, "input:"); 674 675 ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype); 676 ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor); 677 ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product); 678 ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version); 679 680 sprintf(alias + strlen(alias), "-e*"); 681 if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT) 682 do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX); 683 sprintf(alias + strlen(alias), "k*"); 684 if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT) 685 do_input(alias, id->keybit, 686 INPUT_DEVICE_ID_KEY_MIN_INTERESTING, 687 INPUT_DEVICE_ID_KEY_MAX); 688 sprintf(alias + strlen(alias), "r*"); 689 if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT) 690 do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX); 691 sprintf(alias + strlen(alias), "a*"); 692 if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT) 693 do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX); 694 sprintf(alias + strlen(alias), "m*"); 695 if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT) 696 do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX); 697 sprintf(alias + strlen(alias), "l*"); 698 if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT) 699 do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX); 700 sprintf(alias + strlen(alias), "s*"); 701 if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT) 702 do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX); 703 sprintf(alias + strlen(alias), "f*"); 704 if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT) 705 do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX); 706 sprintf(alias + strlen(alias), "w*"); 707 if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT) 708 do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX); 709 return 1; 710 } 711 ADD_TO_DEVTABLE("input", struct input_device_id, do_input_entry); 712 713 static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa, 714 char *alias) 715 { 716 if (eisa->sig[0]) 717 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig); 718 else 719 strcat(alias, "*"); 720 return 1; 721 } 722 ADD_TO_DEVTABLE("eisa", struct eisa_device_id, do_eisa_entry); 723 724 /* Looks like: parisc:tNhvNrevNsvN */ 725 static int do_parisc_entry(const char *filename, struct parisc_device_id *id, 726 char *alias) 727 { 728 id->hw_type = TO_NATIVE(id->hw_type); 729 id->hversion = TO_NATIVE(id->hversion); 730 id->hversion_rev = TO_NATIVE(id->hversion_rev); 731 id->sversion = TO_NATIVE(id->sversion); 732 733 strcpy(alias, "parisc:"); 734 ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type); 735 ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion); 736 ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev); 737 ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion); 738 739 add_wildcard(alias); 740 return 1; 741 } 742 ADD_TO_DEVTABLE("parisc", struct parisc_device_id, do_parisc_entry); 743 744 /* Looks like: sdio:cNvNdN. */ 745 static int do_sdio_entry(const char *filename, 746 struct sdio_device_id *id, char *alias) 747 { 748 id->class = TO_NATIVE(id->class); 749 id->vendor = TO_NATIVE(id->vendor); 750 id->device = TO_NATIVE(id->device); 751 752 strcpy(alias, "sdio:"); 753 ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class); 754 ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor); 755 ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device); 756 add_wildcard(alias); 757 return 1; 758 } 759 ADD_TO_DEVTABLE("sdio", struct sdio_device_id, do_sdio_entry); 760 761 /* Looks like: ssb:vNidNrevN. */ 762 static int do_ssb_entry(const char *filename, 763 struct ssb_device_id *id, char *alias) 764 { 765 id->vendor = TO_NATIVE(id->vendor); 766 id->coreid = TO_NATIVE(id->coreid); 767 id->revision = TO_NATIVE(id->revision); 768 769 strcpy(alias, "ssb:"); 770 ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor); 771 ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid); 772 ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision); 773 add_wildcard(alias); 774 return 1; 775 } 776 ADD_TO_DEVTABLE("ssb", struct ssb_device_id, do_ssb_entry); 777 778 /* Looks like: bcma:mNidNrevNclN. */ 779 static int do_bcma_entry(const char *filename, 780 struct bcma_device_id *id, char *alias) 781 { 782 id->manuf = TO_NATIVE(id->manuf); 783 id->id = TO_NATIVE(id->id); 784 id->rev = TO_NATIVE(id->rev); 785 id->class = TO_NATIVE(id->class); 786 787 strcpy(alias, "bcma:"); 788 ADD(alias, "m", id->manuf != BCMA_ANY_MANUF, id->manuf); 789 ADD(alias, "id", id->id != BCMA_ANY_ID, id->id); 790 ADD(alias, "rev", id->rev != BCMA_ANY_REV, id->rev); 791 ADD(alias, "cl", id->class != BCMA_ANY_CLASS, id->class); 792 add_wildcard(alias); 793 return 1; 794 } 795 ADD_TO_DEVTABLE("bcma", struct bcma_device_id, do_bcma_entry); 796 797 /* Looks like: virtio:dNvN */ 798 static int do_virtio_entry(const char *filename, struct virtio_device_id *id, 799 char *alias) 800 { 801 id->device = TO_NATIVE(id->device); 802 id->vendor = TO_NATIVE(id->vendor); 803 804 strcpy(alias, "virtio:"); 805 ADD(alias, "d", id->device != VIRTIO_DEV_ANY_ID, id->device); 806 ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor); 807 808 add_wildcard(alias); 809 return 1; 810 } 811 ADD_TO_DEVTABLE("virtio", struct virtio_device_id, do_virtio_entry); 812 813 /* 814 * Looks like: vmbus:guid 815 * Each byte of the guid will be represented by two hex characters 816 * in the name. 817 */ 818 819 static int do_vmbus_entry(const char *filename, struct hv_vmbus_device_id *id, 820 char *alias) 821 { 822 int i; 823 char guid_name[((sizeof(id->guid) + 1)) * 2]; 824 825 for (i = 0; i < (sizeof(id->guid) * 2); i += 2) 826 sprintf(&guid_name[i], "%02x", id->guid[i/2]); 827 828 strcpy(alias, "vmbus:"); 829 strcat(alias, guid_name); 830 831 return 1; 832 } 833 ADD_TO_DEVTABLE("vmbus", struct hv_vmbus_device_id, do_vmbus_entry); 834 835 /* Looks like: i2c:S */ 836 static int do_i2c_entry(const char *filename, struct i2c_device_id *id, 837 char *alias) 838 { 839 sprintf(alias, I2C_MODULE_PREFIX "%s", id->name); 840 841 return 1; 842 } 843 ADD_TO_DEVTABLE("i2c", struct i2c_device_id, do_i2c_entry); 844 845 /* Looks like: spi:S */ 846 static int do_spi_entry(const char *filename, struct spi_device_id *id, 847 char *alias) 848 { 849 sprintf(alias, SPI_MODULE_PREFIX "%s", id->name); 850 851 return 1; 852 } 853 ADD_TO_DEVTABLE("spi", struct spi_device_id, do_spi_entry); 854 855 static const struct dmifield { 856 const char *prefix; 857 int field; 858 } dmi_fields[] = { 859 { "bvn", DMI_BIOS_VENDOR }, 860 { "bvr", DMI_BIOS_VERSION }, 861 { "bd", DMI_BIOS_DATE }, 862 { "svn", DMI_SYS_VENDOR }, 863 { "pn", DMI_PRODUCT_NAME }, 864 { "pvr", DMI_PRODUCT_VERSION }, 865 { "rvn", DMI_BOARD_VENDOR }, 866 { "rn", DMI_BOARD_NAME }, 867 { "rvr", DMI_BOARD_VERSION }, 868 { "cvn", DMI_CHASSIS_VENDOR }, 869 { "ct", DMI_CHASSIS_TYPE }, 870 { "cvr", DMI_CHASSIS_VERSION }, 871 { NULL, DMI_NONE } 872 }; 873 874 static void dmi_ascii_filter(char *d, const char *s) 875 { 876 /* Filter out characters we don't want to see in the modalias string */ 877 for (; *s; s++) 878 if (*s > ' ' && *s < 127 && *s != ':') 879 *(d++) = *s; 880 881 *d = 0; 882 } 883 884 885 static int do_dmi_entry(const char *filename, struct dmi_system_id *id, 886 char *alias) 887 { 888 int i, j; 889 890 sprintf(alias, "dmi*"); 891 892 for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) { 893 for (j = 0; j < 4; j++) { 894 if (id->matches[j].slot && 895 id->matches[j].slot == dmi_fields[i].field) { 896 sprintf(alias + strlen(alias), ":%s*", 897 dmi_fields[i].prefix); 898 dmi_ascii_filter(alias + strlen(alias), 899 id->matches[j].substr); 900 strcat(alias, "*"); 901 } 902 } 903 } 904 905 strcat(alias, ":"); 906 return 1; 907 } 908 ADD_TO_DEVTABLE("dmi", struct dmi_system_id, do_dmi_entry); 909 910 static int do_platform_entry(const char *filename, 911 struct platform_device_id *id, char *alias) 912 { 913 sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name); 914 return 1; 915 } 916 ADD_TO_DEVTABLE("platform", struct platform_device_id, do_platform_entry); 917 918 static int do_mdio_entry(const char *filename, 919 struct mdio_device_id *id, char *alias) 920 { 921 int i; 922 923 alias += sprintf(alias, MDIO_MODULE_PREFIX); 924 925 for (i = 0; i < 32; i++) { 926 if (!((id->phy_id_mask >> (31-i)) & 1)) 927 *(alias++) = '?'; 928 else if ((id->phy_id >> (31-i)) & 1) 929 *(alias++) = '1'; 930 else 931 *(alias++) = '0'; 932 } 933 934 /* Terminate the string */ 935 *alias = 0; 936 937 return 1; 938 } 939 ADD_TO_DEVTABLE("mdio", struct mdio_device_id, do_mdio_entry); 940 941 /* Looks like: zorro:iN. */ 942 static int do_zorro_entry(const char *filename, struct zorro_device_id *id, 943 char *alias) 944 { 945 id->id = TO_NATIVE(id->id); 946 strcpy(alias, "zorro:"); 947 ADD(alias, "i", id->id != ZORRO_WILDCARD, id->id); 948 return 1; 949 } 950 ADD_TO_DEVTABLE("zorro", struct zorro_device_id, do_zorro_entry); 951 952 /* looks like: "pnp:dD" */ 953 static int do_isapnp_entry(const char *filename, 954 struct isapnp_device_id *id, char *alias) 955 { 956 sprintf(alias, "pnp:d%c%c%c%x%x%x%x*", 957 'A' + ((id->vendor >> 2) & 0x3f) - 1, 958 'A' + (((id->vendor & 3) << 3) | ((id->vendor >> 13) & 7)) - 1, 959 'A' + ((id->vendor >> 8) & 0x1f) - 1, 960 (id->function >> 4) & 0x0f, id->function & 0x0f, 961 (id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f); 962 return 1; 963 } 964 ADD_TO_DEVTABLE("isapnp", struct isapnp_device_id, do_isapnp_entry); 965 966 /* 967 * Append a match expression for a single masked hex digit. 968 * outp points to a pointer to the character at which to append. 969 * *outp is updated on return to point just after the appended text, 970 * to facilitate further appending. 971 */ 972 static void append_nibble_mask(char **outp, 973 unsigned int nibble, unsigned int mask) 974 { 975 char *p = *outp; 976 unsigned int i; 977 978 switch (mask) { 979 case 0: 980 *p++ = '?'; 981 break; 982 983 case 0xf: 984 p += sprintf(p, "%X", nibble); 985 break; 986 987 default: 988 /* 989 * Dumbly emit a match pattern for all possible matching 990 * digits. This could be improved in some cases using ranges, 991 * but it has the advantage of being trivially correct, and is 992 * often optimal. 993 */ 994 *p++ = '['; 995 for (i = 0; i < 0x10; i++) 996 if ((i & mask) == nibble) 997 p += sprintf(p, "%X", i); 998 *p++ = ']'; 999 } 1000 1001 /* Ensure that the string remains NUL-terminated: */ 1002 *p = '\0'; 1003 1004 /* Advance the caller's end-of-string pointer: */ 1005 *outp = p; 1006 } 1007 1008 /* 1009 * looks like: "amba:dN" 1010 * 1011 * N is exactly 8 digits, where each is an upper-case hex digit, or 1012 * a ? or [] pattern matching exactly one digit. 1013 */ 1014 static int do_amba_entry(const char *filename, 1015 struct amba_id *id, char *alias) 1016 { 1017 unsigned int digit; 1018 char *p = alias; 1019 1020 if ((id->id & id->mask) != id->id) 1021 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: " 1022 "id=0x%08X, mask=0x%08X. Please fix this driver.\n", 1023 filename, id->id, id->mask); 1024 1025 p += sprintf(alias, "amba:d"); 1026 for (digit = 0; digit < 8; digit++) 1027 append_nibble_mask(&p, 1028 (id->id >> (4 * (7 - digit))) & 0xf, 1029 (id->mask >> (4 * (7 - digit))) & 0xf); 1030 1031 return 1; 1032 } 1033 ADD_TO_DEVTABLE("amba", struct amba_id, do_amba_entry); 1034 1035 /* LOOKS like x86cpu:vendor:VVVV:family:FFFF:model:MMMM:feature:*,FEAT,* 1036 * All fields are numbers. It would be nicer to use strings for vendor 1037 * and feature, but getting those out of the build system here is too 1038 * complicated. 1039 */ 1040 1041 static int do_x86cpu_entry(const char *filename, struct x86_cpu_id *id, 1042 char *alias) 1043 { 1044 id->feature = TO_NATIVE(id->feature); 1045 id->family = TO_NATIVE(id->family); 1046 id->model = TO_NATIVE(id->model); 1047 id->vendor = TO_NATIVE(id->vendor); 1048 1049 strcpy(alias, "x86cpu:"); 1050 ADD(alias, "vendor:", id->vendor != X86_VENDOR_ANY, id->vendor); 1051 ADD(alias, ":family:", id->family != X86_FAMILY_ANY, id->family); 1052 ADD(alias, ":model:", id->model != X86_MODEL_ANY, id->model); 1053 strcat(alias, ":feature:*"); 1054 if (id->feature != X86_FEATURE_ANY) 1055 sprintf(alias + strlen(alias), "%04X*", id->feature); 1056 return 1; 1057 } 1058 ADD_TO_DEVTABLE("x86cpu", struct x86_cpu_id, do_x86cpu_entry); 1059 1060 /* Does namelen bytes of name exactly match the symbol? */ 1061 static bool sym_is(const char *name, unsigned namelen, const char *symbol) 1062 { 1063 if (namelen != strlen(symbol)) 1064 return false; 1065 1066 return memcmp(name, symbol, namelen) == 0; 1067 } 1068 1069 static void do_table(void *symval, unsigned long size, 1070 unsigned long id_size, 1071 const char *device_id, 1072 void *function, 1073 struct module *mod) 1074 { 1075 unsigned int i; 1076 char alias[500]; 1077 int (*do_entry)(const char *, void *entry, char *alias) = function; 1078 1079 device_id_check(mod->name, device_id, size, id_size, symval); 1080 /* Leave last one: it's the terminator. */ 1081 size -= id_size; 1082 1083 for (i = 0; i < size; i += id_size) { 1084 if (do_entry(mod->name, symval+i, alias)) { 1085 buf_printf(&mod->dev_table_buf, 1086 "MODULE_ALIAS(\"%s\");\n", alias); 1087 } 1088 } 1089 } 1090 1091 /* Create MODULE_ALIAS() statements. 1092 * At this time, we cannot write the actual output C source yet, 1093 * so we write into the mod->dev_table_buf buffer. */ 1094 void handle_moddevtable(struct module *mod, struct elf_info *info, 1095 Elf_Sym *sym, const char *symname) 1096 { 1097 void *symval; 1098 char *zeros = NULL; 1099 const char *name; 1100 unsigned int namelen; 1101 1102 /* We're looking for a section relative symbol */ 1103 if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections) 1104 return; 1105 1106 /* We're looking for an object */ 1107 if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT) 1108 return; 1109 1110 /* All our symbols are of form <prefix>__mod_XXX_device_table. */ 1111 name = strstr(symname, "__mod_"); 1112 if (!name) 1113 return; 1114 name += strlen("__mod_"); 1115 namelen = strlen(name); 1116 if (namelen < strlen("_device_table")) 1117 return; 1118 if (strcmp(name + namelen - strlen("_device_table"), "_device_table")) 1119 return; 1120 namelen -= strlen("_device_table"); 1121 1122 /* Handle all-NULL symbols allocated into .bss */ 1123 if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) { 1124 zeros = calloc(1, sym->st_size); 1125 symval = zeros; 1126 } else { 1127 symval = (void *)info->hdr 1128 + info->sechdrs[get_secindex(info, sym)].sh_offset 1129 + sym->st_value; 1130 } 1131 1132 /* First handle the "special" cases */ 1133 if (sym_is(name, namelen, "usb")) 1134 do_usb_table(symval, sym->st_size, mod); 1135 else if (sym_is(name, namelen, "pnp")) 1136 do_pnp_device_entry(symval, sym->st_size, mod); 1137 else if (sym_is(name, namelen, "pnp_card")) 1138 do_pnp_card_entries(symval, sym->st_size, mod); 1139 else { 1140 struct devtable **p; 1141 INIT_SECTION(__devtable); 1142 1143 for (p = __start___devtable; p < __stop___devtable; p++) { 1144 if (sym_is(name, namelen, (*p)->device_id)) { 1145 do_table(symval, sym->st_size, (*p)->id_size, 1146 (*p)->device_id, (*p)->function, mod); 1147 break; 1148 } 1149 } 1150 } 1151 free(zeros); 1152 } 1153 1154 /* Now add out buffered information to the generated C source */ 1155 void add_moddevtable(struct buffer *buf, struct module *mod) 1156 { 1157 buf_printf(buf, "\n"); 1158 buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos); 1159 free(mod->dev_table_buf.p); 1160 } 1161