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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
25typedef Elf32_Addr kernel_ulong_t;
26#define BITS_PER_LONG 32
27#else
28typedef 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 */
47static void __attribute__((format (printf, 3, 4)))
48module_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
101typedef uint32_t __u32;
102typedef uint16_t __u16;
103typedef unsigned char __u8;
104
105/* UUID types for backward compatibility, don't use in new code */
106typedef struct {
107 __u8 b[16];
108} guid_t;
109
110typedef 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 */
117typedef struct {
118 __u8 b[16];
119} uuid_le;
120
121/* Big exception to the "don't include kernel headers into userspace, which
122 * even potentially has different endianness and word sizes, since
123 * we handle those differences explicitly below */
124#include "../../include/linux/mod_devicetable.h"
125
126struct devtable {
127 const char *device_id;
128 unsigned long id_size;
129 void (*do_entry)(struct module *mod, void *symval);
130};
131
132/* Define a variable f that holds the value of field f of struct devid
133 * based at address m.
134 */
135#define DEF_FIELD(m, devid, f) \
136 typeof(((struct devid *)0)->f) f = \
137 get_unaligned_native((typeof(f) *)((m) + OFF_##devid##_##f))
138
139/* Define a variable f that holds the address of field f of struct devid
140 * based at address m. Due to the way typeof works, for a field of type
141 * T[N] the variable has type T(*)[N], _not_ T*.
142 */
143#define DEF_FIELD_ADDR(m, devid, f) \
144 typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)
145
146#define ADD(str, sep, cond, field) \
147do { \
148 strcat(str, sep); \
149 if (cond) \
150 sprintf(str + strlen(str), \
151 sizeof(field) == 1 ? "%02X" : \
152 sizeof(field) == 2 ? "%04X" : \
153 sizeof(field) == 4 ? "%08X" : "", \
154 field); \
155 else \
156 sprintf(str + strlen(str), "*"); \
157} while(0)
158
159static inline void add_uuid(char *str, uuid_le uuid)
160{
161 int len = strlen(str);
162
163 sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
164 uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0],
165 uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6],
166 uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11],
167 uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]);
168}
169
170static inline void add_guid(char *str, guid_t guid)
171{
172 int len = strlen(str);
173
174 sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
175 guid.b[3], guid.b[2], guid.b[1], guid.b[0],
176 guid.b[5], guid.b[4], guid.b[7], guid.b[6],
177 guid.b[8], guid.b[9], guid.b[10], guid.b[11],
178 guid.b[12], guid.b[13], guid.b[14], guid.b[15]);
179}
180
181/* USB is special because the bcdDevice can be matched against a numeric range */
182/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
183static void do_usb_entry(void *symval,
184 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
185 unsigned char range_lo, unsigned char range_hi,
186 unsigned char max, struct module *mod)
187{
188 char alias[500];
189 DEF_FIELD(symval, usb_device_id, match_flags);
190 DEF_FIELD(symval, usb_device_id, idVendor);
191 DEF_FIELD(symval, usb_device_id, idProduct);
192 DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
193 DEF_FIELD(symval, usb_device_id, bDeviceClass);
194 DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
195 DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
196 DEF_FIELD(symval, usb_device_id, bInterfaceClass);
197 DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
198 DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
199 DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
200
201 strcpy(alias, "usb:");
202 ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
203 idVendor);
204 ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
205 idProduct);
206
207 strcat(alias, "d");
208 if (bcdDevice_initial_digits)
209 sprintf(alias + strlen(alias), "%0*X",
210 bcdDevice_initial_digits, bcdDevice_initial);
211 if (range_lo == range_hi)
212 sprintf(alias + strlen(alias), "%X", range_lo);
213 else if (range_lo > 0 || range_hi < max) {
214 if (range_lo > 0x9 || range_hi < 0xA)
215 sprintf(alias + strlen(alias),
216 "[%X-%X]",
217 range_lo,
218 range_hi);
219 else {
220 sprintf(alias + strlen(alias),
221 range_lo < 0x9 ? "[%X-9" : "[%X",
222 range_lo);
223 sprintf(alias + strlen(alias),
224 range_hi > 0xA ? "A-%X]" : "%X]",
225 range_hi);
226 }
227 }
228 if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
229 strcat(alias, "*");
230
231 ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
232 bDeviceClass);
233 ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
234 bDeviceSubClass);
235 ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
236 bDeviceProtocol);
237 ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
238 bInterfaceClass);
239 ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
240 bInterfaceSubClass);
241 ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
242 bInterfaceProtocol);
243 ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
244 bInterfaceNumber);
245
246 module_alias_printf(mod, true, "%s", alias);
247}
248
249/* Handles increment/decrement of BCD formatted integers */
250/* Returns the previous value, so it works like i++ or i-- */
251static unsigned int incbcd(unsigned int *bcd,
252 int inc,
253 unsigned char max,
254 size_t chars)
255{
256 unsigned int init = *bcd, i, j;
257 unsigned long long c, dec = 0;
258
259 /* If bcd is not in BCD format, just increment */
260 if (max > 0x9) {
261 *bcd += inc;
262 return init;
263 }
264
265 /* Convert BCD to Decimal */
266 for (i=0 ; i < chars ; i++) {
267 c = (*bcd >> (i << 2)) & 0xf;
268 c = c > 9 ? 9 : c; /* force to bcd just in case */
269 for (j=0 ; j < i ; j++)
270 c = c * 10;
271 dec += c;
272 }
273
274 /* Do our increment/decrement */
275 dec += inc;
276 *bcd = 0;
277
278 /* Convert back to BCD */
279 for (i=0 ; i < chars ; i++) {
280 for (c=1,j=0 ; j < i ; j++)
281 c = c * 10;
282 c = (dec / c) % 10;
283 *bcd += c << (i << 2);
284 }
285 return init;
286}
287
288static void do_usb_entry_multi(struct module *mod, void *symval)
289{
290 unsigned int devlo, devhi;
291 unsigned char chi, clo, max;
292 int ndigits;
293
294 DEF_FIELD(symval, usb_device_id, match_flags);
295 DEF_FIELD(symval, usb_device_id, idVendor);
296 DEF_FIELD(symval, usb_device_id, idProduct);
297 DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
298 DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
299 DEF_FIELD(symval, usb_device_id, bDeviceClass);
300 DEF_FIELD(symval, usb_device_id, bInterfaceClass);
301
302 devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
303 bcdDevice_lo : 0x0U;
304 devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
305 bcdDevice_hi : ~0x0U;
306
307 /* Figure out if this entry is in bcd or hex format */
308 max = 0x9; /* Default to decimal format */
309 for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
310 clo = (devlo >> (ndigits << 2)) & 0xf;
311 chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
312 if (clo > max || chi > max) {
313 max = 0xf;
314 break;
315 }
316 }
317
318 /*
319 * Some modules (visor) have empty slots as placeholder for
320 * run-time specification that results in catch-all alias
321 */
322 if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
323 return;
324
325 /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
326 for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
327 clo = devlo & 0xf;
328 chi = devhi & 0xf;
329 if (chi > max) /* If we are in bcd mode, truncate if necessary */
330 chi = max;
331 devlo >>= 4;
332 devhi >>= 4;
333
334 if (devlo == devhi || !ndigits) {
335 do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
336 break;
337 }
338
339 if (clo > 0x0)
340 do_usb_entry(symval,
341 incbcd(&devlo, 1, max,
342 sizeof(bcdDevice_lo) * 2),
343 ndigits, clo, max, max, mod);
344
345 if (chi < max)
346 do_usb_entry(symval,
347 incbcd(&devhi, -1, max,
348 sizeof(bcdDevice_lo) * 2),
349 ndigits, 0x0, chi, max, mod);
350 }
351}
352
353static void do_of_entry(struct module *mod, void *symval)
354{
355 char alias[500];
356 int len;
357 char *tmp;
358
359 DEF_FIELD_ADDR(symval, of_device_id, name);
360 DEF_FIELD_ADDR(symval, of_device_id, type);
361 DEF_FIELD_ADDR(symval, of_device_id, compatible);
362
363 len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
364 (*type)[0] ? *type : "*");
365
366 if ((*compatible)[0])
367 sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
368 *compatible);
369
370 /* Replace all whitespace with underscores */
371 for (tmp = alias; tmp && *tmp; tmp++)
372 if (isspace(*tmp))
373 *tmp = '_';
374
375 module_alias_printf(mod, false, "%s", alias);
376 module_alias_printf(mod, false, "%sC*", alias);
377}
378
379/* Looks like: hid:bNvNpN */
380static void do_hid_entry(struct module *mod, void *symval)
381{
382 char alias[256] = {};
383
384 DEF_FIELD(symval, hid_device_id, bus);
385 DEF_FIELD(symval, hid_device_id, group);
386 DEF_FIELD(symval, hid_device_id, vendor);
387 DEF_FIELD(symval, hid_device_id, product);
388
389 ADD(alias, "b", bus != HID_BUS_ANY, bus);
390 ADD(alias, "g", group != HID_GROUP_ANY, group);
391 ADD(alias, "v", vendor != HID_ANY_ID, vendor);
392 ADD(alias, "p", product != HID_ANY_ID, product);
393
394 module_alias_printf(mod, false, "hid:%s", alias);
395}
396
397/* Looks like: ieee1394:venNmoNspNverN */
398static void do_ieee1394_entry(struct module *mod, void *symval)
399{
400 char alias[256] = {};
401
402 DEF_FIELD(symval, ieee1394_device_id, match_flags);
403 DEF_FIELD(symval, ieee1394_device_id, vendor_id);
404 DEF_FIELD(symval, ieee1394_device_id, model_id);
405 DEF_FIELD(symval, ieee1394_device_id, specifier_id);
406 DEF_FIELD(symval, ieee1394_device_id, version);
407
408 ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
409 vendor_id);
410 ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
411 model_id);
412 ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
413 specifier_id);
414 ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
415 version);
416
417 module_alias_printf(mod, true, "ieee1394:%s", alias);
418}
419
420/* Looks like: pci:vNdNsvNsdNbcNscNiN or <prefix>_pci:vNdNsvNsdNbcNscNiN. */
421static void do_pci_entry(struct module *mod, void *symval)
422{
423 char alias[256];
424 /* Class field can be divided into these three. */
425 unsigned char baseclass, subclass, interface,
426 baseclass_mask, subclass_mask, interface_mask;
427
428 DEF_FIELD(symval, pci_device_id, vendor);
429 DEF_FIELD(symval, pci_device_id, device);
430 DEF_FIELD(symval, pci_device_id, subvendor);
431 DEF_FIELD(symval, pci_device_id, subdevice);
432 DEF_FIELD(symval, pci_device_id, class);
433 DEF_FIELD(symval, pci_device_id, class_mask);
434 DEF_FIELD(symval, pci_device_id, override_only);
435
436 switch (override_only) {
437 case 0:
438 strcpy(alias, "pci:");
439 break;
440 case PCI_ID_F_VFIO_DRIVER_OVERRIDE:
441 strcpy(alias, "vfio_pci:");
442 break;
443 default:
444 warn("Unknown PCI driver_override alias %08X\n",
445 override_only);
446 }
447
448 ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
449 ADD(alias, "d", device != PCI_ANY_ID, device);
450 ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
451 ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
452
453 baseclass = (class) >> 16;
454 baseclass_mask = (class_mask) >> 16;
455 subclass = (class) >> 8;
456 subclass_mask = (class_mask) >> 8;
457 interface = class;
458 interface_mask = class_mask;
459
460 if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
461 || (subclass_mask != 0 && subclass_mask != 0xFF)
462 || (interface_mask != 0 && interface_mask != 0xFF)) {
463 warn("Can't handle masks in %s:%04X\n",
464 mod->name, class_mask);
465 return;
466 }
467
468 ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
469 ADD(alias, "sc", subclass_mask == 0xFF, subclass);
470 ADD(alias, "i", interface_mask == 0xFF, interface);
471
472 module_alias_printf(mod, true, "%s", alias);
473}
474
475/* looks like: "ccw:tNmNdtNdmN" */
476static void do_ccw_entry(struct module *mod, void *symval)
477{
478 char alias[256] = {};
479
480 DEF_FIELD(symval, ccw_device_id, match_flags);
481 DEF_FIELD(symval, ccw_device_id, cu_type);
482 DEF_FIELD(symval, ccw_device_id, cu_model);
483 DEF_FIELD(symval, ccw_device_id, dev_type);
484 DEF_FIELD(symval, ccw_device_id, dev_model);
485
486 ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
487 cu_type);
488 ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
489 cu_model);
490 ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
491 dev_type);
492 ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
493 dev_model);
494
495 module_alias_printf(mod, true, "ccw:%s", alias);
496}
497
498/* looks like: "ap:tN" */
499static void do_ap_entry(struct module *mod, void *symval)
500{
501 DEF_FIELD(symval, ap_device_id, dev_type);
502
503 module_alias_printf(mod, false, "ap:t%02X*", dev_type);
504}
505
506/* looks like: "css:tN" */
507static void do_css_entry(struct module *mod, void *symval)
508{
509 DEF_FIELD(symval, css_device_id, type);
510
511 module_alias_printf(mod, false, "css:t%01X", type);
512}
513
514/* Looks like: "serio:tyNprNidNexN" */
515static void do_serio_entry(struct module *mod, void *symval)
516{
517 char alias[256] = {};
518
519 DEF_FIELD(symval, serio_device_id, type);
520 DEF_FIELD(symval, serio_device_id, proto);
521 DEF_FIELD(symval, serio_device_id, id);
522 DEF_FIELD(symval, serio_device_id, extra);
523
524 ADD(alias, "ty", type != SERIO_ANY, type);
525 ADD(alias, "pr", proto != SERIO_ANY, proto);
526 ADD(alias, "id", id != SERIO_ANY, id);
527 ADD(alias, "ex", extra != SERIO_ANY, extra);
528
529 module_alias_printf(mod, true, "serio:%s", alias);
530}
531
532/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
533 * "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
534 *
535 * NOTE: Each driver should use one of the following : _HID, _CIDs
536 * or _CLS. Also, bb, ss, and pp can be substituted with ??
537 * as don't care byte.
538 */
539static void do_acpi_entry(struct module *mod, void *symval)
540{
541 DEF_FIELD_ADDR(symval, acpi_device_id, id);
542 DEF_FIELD(symval, acpi_device_id, cls);
543 DEF_FIELD(symval, acpi_device_id, cls_msk);
544
545 if ((*id)[0])
546 module_alias_printf(mod, false, "acpi*:%s:*", *id);
547 else {
548 char alias[256];
549 int i, byte_shift, cnt = 0;
550 unsigned int msk;
551
552 for (i = 1; i <= 3; i++) {
553 byte_shift = 8 * (3-i);
554 msk = (cls_msk >> byte_shift) & 0xFF;
555 if (msk)
556 sprintf(&alias[cnt], "%02x",
557 (cls >> byte_shift) & 0xFF);
558 else
559 sprintf(&alias[cnt], "??");
560 cnt += 2;
561 }
562 module_alias_printf(mod, false, "acpi*:%s:*", alias);
563 }
564}
565
566/* looks like: "pnp:dD" */
567static void do_pnp_device_entry(struct module *mod, void *symval)
568{
569 DEF_FIELD_ADDR(symval, pnp_device_id, id);
570 char acpi_id[sizeof(*id)];
571
572 /* fix broken pnp bus lowercasing */
573 for (unsigned int i = 0; i < sizeof(acpi_id); i++)
574 acpi_id[i] = toupper((*id)[i]);
575 module_alias_printf(mod, false, "pnp:d%s*", *id);
576 module_alias_printf(mod, false, "acpi*:%s:*", acpi_id);
577}
578
579/* looks like: "pnp:dD" for every device of the card */
580static void do_pnp_card_entry(struct module *mod, void *symval)
581{
582 DEF_FIELD_ADDR(symval, pnp_card_device_id, devs);
583
584 for (unsigned int i = 0; i < PNP_MAX_DEVICES; i++) {
585 const char *id = (char *)(*devs)[i].id;
586 char acpi_id[PNP_ID_LEN];
587
588 if (!id[0])
589 break;
590
591 /* fix broken pnp bus lowercasing */
592 for (unsigned int j = 0; j < sizeof(acpi_id); j++)
593 acpi_id[j] = toupper(id[j]);
594
595 /* add an individual alias for every device entry */
596 module_alias_printf(mod, false, "pnp:d%s*", id);
597 module_alias_printf(mod, false, "acpi*:%s:*", acpi_id);
598 }
599}
600
601/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
602static void do_pcmcia_entry(struct module *mod, void *symval)
603{
604 char alias[256] = {};
605
606 DEF_FIELD(symval, pcmcia_device_id, match_flags);
607 DEF_FIELD(symval, pcmcia_device_id, manf_id);
608 DEF_FIELD(symval, pcmcia_device_id, card_id);
609 DEF_FIELD(symval, pcmcia_device_id, func_id);
610 DEF_FIELD(symval, pcmcia_device_id, function);
611 DEF_FIELD(symval, pcmcia_device_id, device_no);
612 DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
613
614 ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
615 manf_id);
616 ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
617 card_id);
618 ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
619 func_id);
620 ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
621 function);
622 ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
623 device_no);
624 ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1,
625 get_unaligned_native(*prod_id_hash + 0));
626 ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2,
627 get_unaligned_native(*prod_id_hash + 1));
628 ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3,
629 get_unaligned_native(*prod_id_hash + 2));
630 ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4,
631 get_unaligned_native(*prod_id_hash + 3));
632
633 module_alias_printf(mod, true, "pcmcia:%s", alias);
634}
635
636static void do_vio_entry(struct module *mod, void *symval)
637{
638 char alias[256];
639 char *tmp;
640 DEF_FIELD_ADDR(symval, vio_device_id, type);
641 DEF_FIELD_ADDR(symval, vio_device_id, compat);
642
643 sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
644 (*compat)[0] ? *compat : "*");
645
646 /* Replace all whitespace with underscores */
647 for (tmp = alias; tmp && *tmp; tmp++)
648 if (isspace (*tmp))
649 *tmp = '_';
650
651 module_alias_printf(mod, true, "%s", alias);
652}
653
654static void __attribute__((format(printf, 3, 4)))
655alias_append(char *alias, size_t size, const char *fmt, ...)
656{
657 size_t len = strlen(alias);
658 va_list args;
659 int n;
660
661 if (len >= size)
662 fatal("alias buffer (%zu) overflow before append\n", size);
663
664 va_start(args, fmt);
665 n = vsnprintf(alias + len, size - len, fmt, args);
666 va_end(args);
667
668 if (n < 0 || (size_t)n >= size - len)
669 fatal("alias buffer (%zu) overflow on append (need %d, have %zu)\n",
670 size, n, size - len);
671}
672
673static void do_input(char *alias, size_t size,
674 kernel_ulong_t *arr, unsigned int min, unsigned int max)
675{
676 unsigned int i;
677
678 for (i = min; i <= max; i++)
679 if (get_unaligned_native(arr + i / BITS_PER_LONG) &
680 (1ULL << (i % BITS_PER_LONG)))
681 alias_append(alias, size, "%X,*", i);
682}
683
684/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
685static void do_input_entry(struct module *mod, void *symval)
686{
687 char alias[256] = {};
688 const size_t sizeof_alias = sizeof(alias);
689
690 DEF_FIELD(symval, input_device_id, flags);
691 DEF_FIELD(symval, input_device_id, bustype);
692 DEF_FIELD(symval, input_device_id, vendor);
693 DEF_FIELD(symval, input_device_id, product);
694 DEF_FIELD(symval, input_device_id, version);
695 DEF_FIELD_ADDR(symval, input_device_id, evbit);
696 DEF_FIELD_ADDR(symval, input_device_id, keybit);
697 DEF_FIELD_ADDR(symval, input_device_id, relbit);
698 DEF_FIELD_ADDR(symval, input_device_id, absbit);
699 DEF_FIELD_ADDR(symval, input_device_id, mscbit);
700 DEF_FIELD_ADDR(symval, input_device_id, ledbit);
701 DEF_FIELD_ADDR(symval, input_device_id, sndbit);
702 DEF_FIELD_ADDR(symval, input_device_id, ffbit);
703 DEF_FIELD_ADDR(symval, input_device_id, swbit);
704
705 ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
706 ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
707 ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
708 ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
709
710 alias_append(alias, sizeof_alias, "-e*");
711 if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
712 do_input(alias, sizeof_alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
713 alias_append(alias, sizeof_alias, "k*");
714 if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
715 do_input(alias, sizeof_alias, *keybit,
716 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
717 INPUT_DEVICE_ID_KEY_MAX);
718 alias_append(alias, sizeof_alias, "r*");
719 if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
720 do_input(alias, sizeof_alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
721 alias_append(alias, sizeof_alias, "a*");
722 if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
723 do_input(alias, sizeof_alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
724 alias_append(alias, sizeof_alias, "m*");
725 if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
726 do_input(alias, sizeof_alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
727 alias_append(alias, sizeof_alias, "l*");
728 if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
729 do_input(alias, sizeof_alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
730 alias_append(alias, sizeof_alias, "s*");
731 if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
732 do_input(alias, sizeof_alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
733 alias_append(alias, sizeof_alias, "f*");
734 if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
735 do_input(alias, sizeof_alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
736 alias_append(alias, sizeof_alias, "w*");
737 if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
738 do_input(alias, sizeof_alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
739
740 module_alias_printf(mod, false, "input:%s", alias);
741}
742
743static void do_eisa_entry(struct module *mod, void *symval)
744{
745 DEF_FIELD_ADDR(symval, eisa_device_id, sig);
746 module_alias_printf(mod, false, EISA_DEVICE_MODALIAS_FMT "*", *sig);
747}
748
749/* Looks like: parisc:tNhvNrevNsvN */
750static void do_parisc_entry(struct module *mod, void *symval)
751{
752 char alias[256] = {};
753
754 DEF_FIELD(symval, parisc_device_id, hw_type);
755 DEF_FIELD(symval, parisc_device_id, hversion);
756 DEF_FIELD(symval, parisc_device_id, hversion_rev);
757 DEF_FIELD(symval, parisc_device_id, sversion);
758
759 ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
760 ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
761 ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
762 ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
763
764 module_alias_printf(mod, true, "parisc:%s", alias);
765}
766
767/* Looks like: sdio:cNvNdN. */
768static void do_sdio_entry(struct module *mod, void *symval)
769{
770 char alias[256] = {};
771
772 DEF_FIELD(symval, sdio_device_id, class);
773 DEF_FIELD(symval, sdio_device_id, vendor);
774 DEF_FIELD(symval, sdio_device_id, device);
775
776 ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
777 ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
778 ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
779
780 module_alias_printf(mod, true, "sdio:%s", alias);
781}
782
783/* Looks like: ssb:vNidNrevN. */
784static void do_ssb_entry(struct module *mod, void *symval)
785{
786 char alias[256] = {};
787
788 DEF_FIELD(symval, ssb_device_id, vendor);
789 DEF_FIELD(symval, ssb_device_id, coreid);
790 DEF_FIELD(symval, ssb_device_id, revision);
791
792 ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
793 ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
794 ADD(alias, "rev", revision != SSB_ANY_REV, revision);
795
796 module_alias_printf(mod, true, "ssb:%s", alias);
797}
798
799/* Looks like: bcma:mNidNrevNclN. */
800static void do_bcma_entry(struct module *mod, void *symval)
801{
802 char alias[256] = {};
803
804 DEF_FIELD(symval, bcma_device_id, manuf);
805 DEF_FIELD(symval, bcma_device_id, id);
806 DEF_FIELD(symval, bcma_device_id, rev);
807 DEF_FIELD(symval, bcma_device_id, class);
808
809 ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
810 ADD(alias, "id", id != BCMA_ANY_ID, id);
811 ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
812 ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
813
814 module_alias_printf(mod, true, "bcma:%s", alias);
815}
816
817/* Looks like: virtio:dNvN */
818static void do_virtio_entry(struct module *mod, void *symval)
819{
820 char alias[256] = {};
821
822 DEF_FIELD(symval, virtio_device_id, device);
823 DEF_FIELD(symval, virtio_device_id, vendor);
824
825 ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
826 ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
827
828 module_alias_printf(mod, true, "virtio:%s", alias);
829}
830
831/*
832 * Looks like: vmbus:guid
833 * Each byte of the guid will be represented by two hex characters
834 * in the name.
835 */
836static void do_vmbus_entry(struct module *mod, void *symval)
837{
838 DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
839 char guid_name[sizeof(*guid) * 2 + 1];
840
841 for (int i = 0; i < sizeof(*guid); i++)
842 sprintf(&guid_name[i * 2], "%02x", guid->b[i]);
843
844 module_alias_printf(mod, false, "vmbus:%s", guid_name);
845}
846
847/* Looks like: rpmsg:S */
848static void do_rpmsg_entry(struct module *mod, void *symval)
849{
850 DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
851
852 module_alias_printf(mod, false, RPMSG_DEVICE_MODALIAS_FMT, *name);
853}
854
855/* Looks like: i2c:S */
856static void do_i2c_entry(struct module *mod, void *symval)
857{
858 DEF_FIELD_ADDR(symval, i2c_device_id, name);
859
860 module_alias_printf(mod, false, I2C_MODULE_PREFIX "%s", *name);
861}
862
863static void do_i3c_entry(struct module *mod, void *symval)
864{
865 char alias[256] = {};
866
867 DEF_FIELD(symval, i3c_device_id, match_flags);
868 DEF_FIELD(symval, i3c_device_id, dcr);
869 DEF_FIELD(symval, i3c_device_id, manuf_id);
870 DEF_FIELD(symval, i3c_device_id, part_id);
871 DEF_FIELD(symval, i3c_device_id, extra_info);
872
873 ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr);
874 ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id);
875 ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id);
876 ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info);
877
878 module_alias_printf(mod, false, "i3c:%s", alias);
879}
880
881static void do_slim_entry(struct module *mod, void *symval)
882{
883 DEF_FIELD(symval, slim_device_id, manf_id);
884 DEF_FIELD(symval, slim_device_id, prod_code);
885
886 module_alias_printf(mod, false, "slim:%x:%x:*", manf_id, prod_code);
887}
888
889/* Looks like: spi:S */
890static void do_spi_entry(struct module *mod, void *symval)
891{
892 DEF_FIELD_ADDR(symval, spi_device_id, name);
893
894 module_alias_printf(mod, false, SPI_MODULE_PREFIX "%s", *name);
895}
896
897static const struct dmifield {
898 const char *prefix;
899 int field;
900} dmi_fields[] = {
901 { "bvn", DMI_BIOS_VENDOR },
902 { "bvr", DMI_BIOS_VERSION },
903 { "bd", DMI_BIOS_DATE },
904 { "br", DMI_BIOS_RELEASE },
905 { "efr", DMI_EC_FIRMWARE_RELEASE },
906 { "svn", DMI_SYS_VENDOR },
907 { "pn", DMI_PRODUCT_NAME },
908 { "pvr", DMI_PRODUCT_VERSION },
909 { "rvn", DMI_BOARD_VENDOR },
910 { "rn", DMI_BOARD_NAME },
911 { "rvr", DMI_BOARD_VERSION },
912 { "cvn", DMI_CHASSIS_VENDOR },
913 { "ct", DMI_CHASSIS_TYPE },
914 { "cvr", DMI_CHASSIS_VERSION },
915 { NULL, DMI_NONE }
916};
917
918static void dmi_ascii_filter(char *d, size_t avail, const char *s)
919{
920 /* Filter out characters we don't want to see in the modalias string */
921 for (; *s; s++)
922 if (*s > ' ' && *s < 127 && *s != ':') {
923 if (avail <= 1)
924 fatal("%s: alias buffer overflow\n", __func__);
925 *(d++) = *s;
926 avail--;
927 }
928
929 *d = 0;
930}
931
932
933static void do_dmi_entry(struct module *mod, void *symval)
934{
935 char alias[256] = {};
936 const size_t sizeof_alias = sizeof(alias);
937 size_t len;
938 int i, j;
939 DEF_FIELD_ADDR(symval, dmi_system_id, matches);
940
941 for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
942 for (j = 0; j < 4; j++) {
943 if ((*matches)[j].slot &&
944 (*matches)[j].slot == dmi_fields[i].field) {
945 alias_append(alias, sizeof_alias, ":%s*",
946 dmi_fields[i].prefix);
947 len = strlen(alias);
948 dmi_ascii_filter(alias + len, sizeof_alias - len,
949 (*matches)[j].substr);
950 alias_append(alias, sizeof_alias, "*");
951 }
952 }
953 }
954
955 module_alias_printf(mod, false, "dmi*%s:", alias);
956}
957
958static void do_platform_entry(struct module *mod, void *symval)
959{
960 DEF_FIELD_ADDR(symval, platform_device_id, name);
961
962 module_alias_printf(mod, false, PLATFORM_MODULE_PREFIX "%s", *name);
963}
964
965static void do_mdio_entry(struct module *mod, void *symval)
966{
967 char id[33];
968 int i;
969 DEF_FIELD(symval, mdio_device_id, phy_id);
970 DEF_FIELD(symval, mdio_device_id, phy_id_mask);
971
972 for (i = 0; i < 32; i++) {
973 if (!((phy_id_mask >> (31-i)) & 1))
974 id[i] = '?';
975 else if ((phy_id >> (31-i)) & 1)
976 id[i] = '1';
977 else
978 id[i] = '0';
979 }
980
981 /* Terminate the string */
982 id[32] = '\0';
983
984 module_alias_printf(mod, false, MDIO_MODULE_PREFIX "%s", id);
985}
986
987/* Looks like: zorro:iN. */
988static void do_zorro_entry(struct module *mod, void *symval)
989{
990 char alias[256] = {};
991 DEF_FIELD(symval, zorro_device_id, id);
992
993 ADD(alias, "i", id != ZORRO_WILDCARD, id);
994
995 module_alias_printf(mod, false, "zorro:%s", alias);
996}
997
998/* looks like: "pnp:dD" */
999static void do_isapnp_entry(struct module *mod, void *symval)
1000{
1001 DEF_FIELD(symval, isapnp_device_id, vendor);
1002 DEF_FIELD(symval, isapnp_device_id, function);
1003 module_alias_printf(mod, false, "pnp:d%c%c%c%x%x%x%x*",
1004 'A' + ((vendor >> 2) & 0x3f) - 1,
1005 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
1006 'A' + ((vendor >> 8) & 0x1f) - 1,
1007 (function >> 4) & 0x0f, function & 0x0f,
1008 (function >> 12) & 0x0f, (function >> 8) & 0x0f);
1009}
1010
1011/* Looks like: "ipack:fNvNdN". */
1012static void do_ipack_entry(struct module *mod, void *symval)
1013{
1014 char alias[256] = {};
1015 DEF_FIELD(symval, ipack_device_id, format);
1016 DEF_FIELD(symval, ipack_device_id, vendor);
1017 DEF_FIELD(symval, ipack_device_id, device);
1018
1019 ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
1020 ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
1021 ADD(alias, "d", device != IPACK_ANY_ID, device);
1022
1023 module_alias_printf(mod, true, "ipack:%s", alias);
1024}
1025
1026/*
1027 * Append a match expression for a single masked hex digit.
1028 * outp points to a pointer to the character at which to append.
1029 * *outp is updated on return to point just after the appended text,
1030 * to facilitate further appending.
1031 */
1032static void append_nibble_mask(char **outp,
1033 unsigned int nibble, unsigned int mask)
1034{
1035 char *p = *outp;
1036 unsigned int i;
1037
1038 switch (mask) {
1039 case 0:
1040 *p++ = '?';
1041 break;
1042
1043 case 0xf:
1044 p += sprintf(p, "%X", nibble);
1045 break;
1046
1047 default:
1048 /*
1049 * Dumbly emit a match pattern for all possible matching
1050 * digits. This could be improved in some cases using ranges,
1051 * but it has the advantage of being trivially correct, and is
1052 * often optimal.
1053 */
1054 *p++ = '[';
1055 for (i = 0; i < 0x10; i++)
1056 if ((i & mask) == nibble)
1057 p += sprintf(p, "%X", i);
1058 *p++ = ']';
1059 }
1060
1061 /* Ensure that the string remains NUL-terminated: */
1062 *p = '\0';
1063
1064 /* Advance the caller's end-of-string pointer: */
1065 *outp = p;
1066}
1067
1068/*
1069 * looks like: "amba:dN"
1070 *
1071 * N is exactly 8 digits, where each is an upper-case hex digit, or
1072 * a ? or [] pattern matching exactly one digit.
1073 */
1074static void do_amba_entry(struct module *mod, void *symval)
1075{
1076 char alias[256];
1077 unsigned int digit;
1078 char *p = alias;
1079 DEF_FIELD(symval, amba_id, id);
1080 DEF_FIELD(symval, amba_id, mask);
1081
1082 if ((id & mask) != id)
1083 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: id=0x%08X, mask=0x%08X. Please fix this driver.\n",
1084 mod->name, id, mask);
1085
1086 for (digit = 0; digit < 8; digit++)
1087 append_nibble_mask(&p,
1088 (id >> (4 * (7 - digit))) & 0xf,
1089 (mask >> (4 * (7 - digit))) & 0xf);
1090
1091 module_alias_printf(mod, false, "amba:d%s", alias);
1092}
1093
1094/*
1095 * looks like: "mipscdmm:tN"
1096 *
1097 * N is exactly 2 digits, where each is an upper-case hex digit, or
1098 * a ? or [] pattern matching exactly one digit.
1099 */
1100static void do_mips_cdmm_entry(struct module *mod, void *symval)
1101{
1102 DEF_FIELD(symval, mips_cdmm_device_id, type);
1103
1104 module_alias_printf(mod, false, "mipscdmm:t%02X*", type);
1105}
1106
1107/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
1108 * All fields are numbers. It would be nicer to use strings for vendor
1109 * and feature, but getting those out of the build system here is too
1110 * complicated.
1111 */
1112
1113static void do_x86cpu_entry(struct module *mod, void *symval)
1114{
1115 char alias[256] = {};
1116
1117 DEF_FIELD(symval, x86_cpu_id, feature);
1118 DEF_FIELD(symval, x86_cpu_id, family);
1119 DEF_FIELD(symval, x86_cpu_id, model);
1120 DEF_FIELD(symval, x86_cpu_id, vendor);
1121
1122 ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
1123 ADD(alias, "fam", family != X86_FAMILY_ANY, family);
1124 ADD(alias, "mod", model != X86_MODEL_ANY, model);
1125 strcat(alias, ":feature:*");
1126 if (feature != X86_FEATURE_ANY)
1127 sprintf(alias + strlen(alias), "%04X*", feature);
1128
1129 module_alias_printf(mod, false, "cpu:type:x86,%s", alias);
1130}
1131
1132/* LOOKS like cpu:type:*:feature:*FEAT* */
1133static void do_cpu_entry(struct module *mod, void *symval)
1134{
1135 DEF_FIELD(symval, cpu_feature, feature);
1136
1137 module_alias_printf(mod, false, "cpu:type:*:feature:*%04X*", feature);
1138}
1139
1140/* Looks like: mcb:16zN */
1141static void do_mcb_entry(struct module *mod, void *symval)
1142{
1143 DEF_FIELD(symval, mcb_device_id, device);
1144
1145 module_alias_printf(mod, false, "mcb:16z%03d", device);
1146}
1147
1148/* Looks like: mei:S:uuid:N:* */
1149static void do_mei_entry(struct module *mod, void *symval)
1150{
1151 char alias[256] = {};
1152
1153 DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1154 DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);
1155 DEF_FIELD(symval, mei_cl_device_id, version);
1156
1157 add_uuid(alias, *uuid);
1158 ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
1159
1160 module_alias_printf(mod, false, MEI_CL_MODULE_PREFIX "%s:%s:*",
1161 (*name)[0] ? *name : "*", alias);
1162}
1163
1164/* Looks like: rapidio:vNdNavNadN */
1165static void do_rio_entry(struct module *mod, void *symval)
1166{
1167 char alias[256] = {};
1168
1169 DEF_FIELD(symval, rio_device_id, did);
1170 DEF_FIELD(symval, rio_device_id, vid);
1171 DEF_FIELD(symval, rio_device_id, asm_did);
1172 DEF_FIELD(symval, rio_device_id, asm_vid);
1173
1174 ADD(alias, "v", vid != RIO_ANY_ID, vid);
1175 ADD(alias, "d", did != RIO_ANY_ID, did);
1176 ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1177 ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1178
1179 module_alias_printf(mod, true, "rapidio:%s", alias);
1180}
1181
1182/* Looks like: ulpi:vNpN */
1183static void do_ulpi_entry(struct module *mod, void *symval)
1184{
1185 DEF_FIELD(symval, ulpi_device_id, vendor);
1186 DEF_FIELD(symval, ulpi_device_id, product);
1187
1188 module_alias_printf(mod, false, "ulpi:v%04xp%04x", vendor, product);
1189}
1190
1191/* Looks like: hdaudio:vNrNaN */
1192static void do_hda_entry(struct module *mod, void *symval)
1193{
1194 char alias[256] = {};
1195
1196 DEF_FIELD(symval, hda_device_id, vendor_id);
1197 DEF_FIELD(symval, hda_device_id, rev_id);
1198 DEF_FIELD(symval, hda_device_id, api_version);
1199
1200 ADD(alias, "v", vendor_id != 0, vendor_id);
1201 ADD(alias, "r", rev_id != 0, rev_id);
1202 ADD(alias, "a", api_version != 0, api_version);
1203
1204 module_alias_printf(mod, true, "hdaudio:%s", alias);
1205}
1206
1207/* Looks like: sdw:mNpNvNcN */
1208static void do_sdw_entry(struct module *mod, void *symval)
1209{
1210 char alias[256] = {};
1211
1212 DEF_FIELD(symval, sdw_device_id, mfg_id);
1213 DEF_FIELD(symval, sdw_device_id, part_id);
1214 DEF_FIELD(symval, sdw_device_id, sdw_version);
1215 DEF_FIELD(symval, sdw_device_id, class_id);
1216
1217 ADD(alias, "m", mfg_id != 0, mfg_id);
1218 ADD(alias, "p", part_id != 0, part_id);
1219 ADD(alias, "v", sdw_version != 0, sdw_version);
1220 ADD(alias, "c", class_id != 0, class_id);
1221
1222 module_alias_printf(mod, true, "sdw:%s", alias);
1223}
1224
1225/* Looks like: fsl-mc:vNdN */
1226static void do_fsl_mc_entry(struct module *mod, void *symval)
1227{
1228 DEF_FIELD(symval, fsl_mc_device_id, vendor);
1229 DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
1230
1231 module_alias_printf(mod, false, "fsl-mc:v%08Xd%s", vendor, *obj_type);
1232}
1233
1234/* Looks like: tbsvc:kSpNvNrN */
1235static void do_tbsvc_entry(struct module *mod, void *symval)
1236{
1237 char alias[256] = {};
1238
1239 DEF_FIELD(symval, tb_service_id, match_flags);
1240 DEF_FIELD_ADDR(symval, tb_service_id, protocol_key);
1241 DEF_FIELD(symval, tb_service_id, protocol_id);
1242 DEF_FIELD(symval, tb_service_id, protocol_version);
1243 DEF_FIELD(symval, tb_service_id, protocol_revision);
1244
1245 if (match_flags & TBSVC_MATCH_PROTOCOL_KEY)
1246 sprintf(alias + strlen(alias), "k%s", *protocol_key);
1247 else
1248 strcat(alias + strlen(alias), "k*");
1249 ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id);
1250 ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION,
1251 protocol_version);
1252 ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION,
1253 protocol_revision);
1254
1255 module_alias_printf(mod, true, "tbsvc:%s", alias);
1256}
1257
1258/* Looks like: typec:idN */
1259static void do_typec_entry(struct module *mod, void *symval)
1260{
1261 DEF_FIELD(symval, typec_device_id, svid);
1262
1263 module_alias_printf(mod, false, "typec:id%04X", svid);
1264}
1265
1266/* Looks like: tee:uuid */
1267static void do_tee_entry(struct module *mod, void *symval)
1268{
1269 DEF_FIELD_ADDR(symval, tee_client_device_id, uuid);
1270
1271 module_alias_printf(mod, true,
1272 "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1273 uuid->b[0], uuid->b[1], uuid->b[2], uuid->b[3], uuid->b[4],
1274 uuid->b[5], uuid->b[6], uuid->b[7], uuid->b[8], uuid->b[9],
1275 uuid->b[10], uuid->b[11], uuid->b[12], uuid->b[13], uuid->b[14],
1276 uuid->b[15]);
1277}
1278
1279/* Looks like: wmi:guid */
1280static void do_wmi_entry(struct module *mod, void *symval)
1281{
1282 DEF_FIELD_ADDR(symval, wmi_device_id, guid_string);
1283 char result[sizeof(*guid_string)];
1284 int i;
1285
1286 if (strlen(*guid_string) != UUID_STRING_LEN) {
1287 warn("Invalid WMI device id 'wmi:%s' in '%s'\n",
1288 *guid_string, mod->name);
1289 return;
1290 }
1291
1292 for (i = 0; i < UUID_STRING_LEN; i++) {
1293 char value = (*guid_string)[i];
1294 bool valid = false;
1295
1296 if (i == 8 || i == 13 || i == 18 || i == 23) {
1297 if (value == '-')
1298 valid = true;
1299 } else {
1300 if (isxdigit(value))
1301 valid = true;
1302 }
1303
1304 if (!valid) {
1305 warn("Invalid character %c inside WMI GUID string '%s' in '%s'\n",
1306 value, *guid_string, mod->name);
1307 return;
1308 }
1309
1310 /* Some GUIDs from BMOF definitions contain lowercase characters */
1311 result[i] = toupper(value);
1312 }
1313
1314 result[i] = '\0';
1315
1316 module_alias_printf(mod, false, WMI_MODULE_PREFIX "%s", result);
1317}
1318
1319/* Looks like: mhi:S */
1320static void do_mhi_entry(struct module *mod, void *symval)
1321{
1322 DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1323 module_alias_printf(mod, false, MHI_DEVICE_MODALIAS_FMT, *chan);
1324}
1325
1326/* Looks like: mhi_ep:S */
1327static void do_mhi_ep_entry(struct module *mod, void *symval)
1328{
1329 DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1330
1331 module_alias_printf(mod, false, MHI_EP_DEVICE_MODALIAS_FMT, *chan);
1332}
1333
1334/* Looks like: ishtp:{guid} */
1335static void do_ishtp_entry(struct module *mod, void *symval)
1336{
1337 char alias[256] = {};
1338 DEF_FIELD_ADDR(symval, ishtp_device_id, guid);
1339
1340 add_guid(alias, *guid);
1341
1342 module_alias_printf(mod, false, ISHTP_MODULE_PREFIX "{%s}", alias);
1343}
1344
1345static void do_auxiliary_entry(struct module *mod, void *symval)
1346{
1347 DEF_FIELD_ADDR(symval, auxiliary_device_id, name);
1348
1349 module_alias_printf(mod, false, AUXILIARY_MODULE_PREFIX "%s", *name);
1350}
1351
1352static void do_arm_smccc_entry(struct module *mod, void *symval)
1353{
1354 DEF_FIELD(symval, arm_smccc_device_id, func_id);
1355
1356 module_alias_printf(mod, false, ARM_SMCCC_MODULE_PREFIX "f%08X", func_id);
1357}
1358
1359/*
1360 * Looks like: ssam:dNcNtNiNfN
1361 *
1362 * N is exactly 2 digits, where each is an upper-case hex digit.
1363 */
1364static void do_ssam_entry(struct module *mod, void *symval)
1365{
1366 char alias[256] = {};
1367
1368 DEF_FIELD(symval, ssam_device_id, match_flags);
1369 DEF_FIELD(symval, ssam_device_id, domain);
1370 DEF_FIELD(symval, ssam_device_id, category);
1371 DEF_FIELD(symval, ssam_device_id, target);
1372 DEF_FIELD(symval, ssam_device_id, instance);
1373 DEF_FIELD(symval, ssam_device_id, function);
1374
1375 ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target);
1376 ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance);
1377 ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function);
1378
1379 module_alias_printf(mod, false, "ssam:d%02Xc%02X%s",
1380 domain, category, alias);
1381}
1382
1383/* Looks like: dfl:tNfN */
1384static void do_dfl_entry(struct module *mod, void *symval)
1385{
1386 DEF_FIELD(symval, dfl_device_id, type);
1387 DEF_FIELD(symval, dfl_device_id, feature_id);
1388
1389 module_alias_printf(mod, true, "dfl:t%04Xf%04X", type, feature_id);
1390}
1391
1392/* Looks like: cdx:vNdN */
1393static void do_cdx_entry(struct module *mod, void *symval)
1394{
1395 char alias[256];
1396
1397 DEF_FIELD(symval, cdx_device_id, vendor);
1398 DEF_FIELD(symval, cdx_device_id, device);
1399 DEF_FIELD(symval, cdx_device_id, subvendor);
1400 DEF_FIELD(symval, cdx_device_id, subdevice);
1401 DEF_FIELD(symval, cdx_device_id, class);
1402 DEF_FIELD(symval, cdx_device_id, class_mask);
1403 DEF_FIELD(symval, cdx_device_id, override_only);
1404
1405 switch (override_only) {
1406 case 0:
1407 strcpy(alias, "cdx:");
1408 break;
1409 case CDX_ID_F_VFIO_DRIVER_OVERRIDE:
1410 strcpy(alias, "vfio_cdx:");
1411 break;
1412 default:
1413 warn("Unknown CDX driver_override alias %08X\n",
1414 override_only);
1415 return;
1416 }
1417
1418 ADD(alias, "v", vendor != CDX_ANY_ID, vendor);
1419 ADD(alias, "d", device != CDX_ANY_ID, device);
1420 ADD(alias, "sv", subvendor != CDX_ANY_ID, subvendor);
1421 ADD(alias, "sd", subdevice != CDX_ANY_ID, subdevice);
1422 ADD(alias, "c", class_mask == 0xFFFFFF, class);
1423
1424 module_alias_printf(mod, false, "%s", alias);
1425}
1426
1427static void do_vchiq_entry(struct module *mod, void *symval)
1428{
1429 DEF_FIELD_ADDR(symval, vchiq_device_id, name);
1430
1431 module_alias_printf(mod, false, "vchiq:%s", *name);
1432}
1433
1434/* Looks like: coreboot:tN */
1435static void do_coreboot_entry(struct module *mod, void *symval)
1436{
1437 DEF_FIELD(symval, coreboot_device_id, tag);
1438
1439 module_alias_printf(mod, false, "coreboot:t%08X", tag);
1440}
1441
1442/* Does namelen bytes of name exactly match the symbol? */
1443static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1444{
1445 if (namelen != strlen(symbol))
1446 return false;
1447
1448 return memcmp(name, symbol, namelen) == 0;
1449}
1450
1451static void do_table(const char *name, void *symval, unsigned long size,
1452 unsigned long id_size,
1453 const char *device_id,
1454 void (*do_entry)(struct module *mod, void *symval),
1455 struct module *mod)
1456{
1457 unsigned int i;
1458
1459 if (size % id_size || size < id_size) {
1460 error("%s: type mismatch between %s[] and MODULE_DEVICE_TABLE(%s, ...)\n",
1461 mod->name, name, device_id);
1462 return;
1463 }
1464
1465 /* Verify the last entry is a terminator */
1466 for (i = size - id_size; i < size; i++) {
1467 if (*(uint8_t *)(symval + i)) {
1468 error("%s: %s[] is not terminated with a NULL entry\n",
1469 mod->name, name);
1470 return;
1471 }
1472 }
1473
1474 /* Leave last one: it's the terminator. */
1475 size -= id_size;
1476
1477 for (i = 0; i < size; i += id_size)
1478 do_entry(mod, symval + i);
1479}
1480
1481static const struct devtable devtable[] = {
1482 {"hid", SIZE_hid_device_id, do_hid_entry},
1483 {"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
1484 {"pci", SIZE_pci_device_id, do_pci_entry},
1485 {"ccw", SIZE_ccw_device_id, do_ccw_entry},
1486 {"ap", SIZE_ap_device_id, do_ap_entry},
1487 {"css", SIZE_css_device_id, do_css_entry},
1488 {"serio", SIZE_serio_device_id, do_serio_entry},
1489 {"acpi", SIZE_acpi_device_id, do_acpi_entry},
1490 {"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
1491 {"vio", SIZE_vio_device_id, do_vio_entry},
1492 {"input", SIZE_input_device_id, do_input_entry},
1493 {"eisa", SIZE_eisa_device_id, do_eisa_entry},
1494 {"parisc", SIZE_parisc_device_id, do_parisc_entry},
1495 {"sdio", SIZE_sdio_device_id, do_sdio_entry},
1496 {"ssb", SIZE_ssb_device_id, do_ssb_entry},
1497 {"bcma", SIZE_bcma_device_id, do_bcma_entry},
1498 {"virtio", SIZE_virtio_device_id, do_virtio_entry},
1499 {"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
1500 {"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
1501 {"i2c", SIZE_i2c_device_id, do_i2c_entry},
1502 {"i3c", SIZE_i3c_device_id, do_i3c_entry},
1503 {"slim", SIZE_slim_device_id, do_slim_entry},
1504 {"spi", SIZE_spi_device_id, do_spi_entry},
1505 {"dmi", SIZE_dmi_system_id, do_dmi_entry},
1506 {"platform", SIZE_platform_device_id, do_platform_entry},
1507 {"mdio", SIZE_mdio_device_id, do_mdio_entry},
1508 {"zorro", SIZE_zorro_device_id, do_zorro_entry},
1509 {"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
1510 {"ipack", SIZE_ipack_device_id, do_ipack_entry},
1511 {"amba", SIZE_amba_id, do_amba_entry},
1512 {"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
1513 {"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
1514 {"cpu", SIZE_cpu_feature, do_cpu_entry},
1515 {"mcb", SIZE_mcb_device_id, do_mcb_entry},
1516 {"mei", SIZE_mei_cl_device_id, do_mei_entry},
1517 {"rapidio", SIZE_rio_device_id, do_rio_entry},
1518 {"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
1519 {"hdaudio", SIZE_hda_device_id, do_hda_entry},
1520 {"sdw", SIZE_sdw_device_id, do_sdw_entry},
1521 {"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
1522 {"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
1523 {"typec", SIZE_typec_device_id, do_typec_entry},
1524 {"tee", SIZE_tee_client_device_id, do_tee_entry},
1525 {"wmi", SIZE_wmi_device_id, do_wmi_entry},
1526 {"mhi", SIZE_mhi_device_id, do_mhi_entry},
1527 {"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry},
1528 {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry},
1529 {"arm_smccc", SIZE_arm_smccc_device_id, do_arm_smccc_entry},
1530 {"ssam", SIZE_ssam_device_id, do_ssam_entry},
1531 {"dfl", SIZE_dfl_device_id, do_dfl_entry},
1532 {"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
1533 {"cdx", SIZE_cdx_device_id, do_cdx_entry},
1534 {"vchiq", SIZE_vchiq_device_id, do_vchiq_entry},
1535 {"coreboot", SIZE_coreboot_device_id, do_coreboot_entry},
1536 {"of", SIZE_of_device_id, do_of_entry},
1537 {"usb", SIZE_usb_device_id, do_usb_entry_multi},
1538 {"pnp", SIZE_pnp_device_id, do_pnp_device_entry},
1539 {"pnp_card", SIZE_pnp_card_device_id, do_pnp_card_entry},
1540};
1541
1542/* Create MODULE_ALIAS() statements.
1543 * At this time, we cannot write the actual output C source yet,
1544 * so we write into the mod->dev_table_buf buffer. */
1545void handle_moddevtable(struct module *mod, struct elf_info *info,
1546 Elf_Sym *sym, const char *symname)
1547{
1548 void *symval;
1549 char *zeros = NULL;
1550 const char *type, *name, *modname;
1551 size_t typelen, modnamelen;
1552 static const char *prefix = "__mod_device_table__";
1553
1554 /* We're looking for a section relative symbol */
1555 if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1556 return;
1557
1558 /* We're looking for an object */
1559 if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1560 return;
1561
1562 /* All our symbols are of form __mod_device_table__kmod_<modname>__<type>__<name>. */
1563 if (!strstarts(symname, prefix))
1564 return;
1565
1566 modname = strstr(symname, "__kmod_");
1567 if (!modname)
1568 return;
1569 modname += strlen("__kmod_");
1570
1571 type = strstr(modname, "__");
1572 if (!type)
1573 return;
1574 modnamelen = type - modname;
1575 type += strlen("__");
1576
1577 name = strstr(type, "__");
1578 if (!name)
1579 return;
1580 typelen = name - type;
1581 name += strlen("__");
1582
1583 /* Handle all-NULL symbols allocated into .bss */
1584 if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1585 zeros = calloc(1, sym->st_size);
1586 symval = zeros;
1587 } else {
1588 symval = sym_get_data(info, sym);
1589 }
1590
1591 for (int i = 0; i < ARRAY_SIZE(devtable); i++) {
1592 const struct devtable *p = &devtable[i];
1593
1594 if (sym_is(type, typelen, p->device_id)) {
1595 do_table(name, symval, sym->st_size, p->id_size,
1596 p->device_id, p->do_entry, mod);
1597 break;
1598 }
1599 }
1600
1601 if (mod->is_vmlinux) {
1602 struct module_alias *alias;
1603
1604 /*
1605 * If this is vmlinux, record the name of the builtin module.
1606 * Traverse the linked list in the reverse order, and set the
1607 * builtin_modname unless it has already been set in the
1608 * previous call.
1609 */
1610 list_for_each_entry_reverse(alias, &mod->aliases, node) {
1611 if (alias->builtin_modname)
1612 break;
1613 alias->builtin_modname = xstrndup(modname, modnamelen);
1614 }
1615 }
1616
1617 free(zeros);
1618}