1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * drivers/acpi/resource.c - ACPI device resources interpretation.
4 *
5 * Copyright (C) 2012, Intel Corp.
6 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11 */
12
13 #include <linux/acpi.h>
14 #include <linux/device.h>
15 #include <linux/export.h>
16 #include <linux/ioport.h>
17 #include <linux/slab.h>
18 #include <linux/irq.h>
19 #include <linux/dmi.h>
20
21 #ifdef CONFIG_X86
22 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
acpi_iospace_resource_valid(struct resource * res)23 static inline bool acpi_iospace_resource_valid(struct resource *res)
24 {
25 /* On X86 IO space is limited to the [0 - 64K] IO port range */
26 return res->end < 0x10003;
27 }
28 #else
29 #define valid_IRQ(i) (true)
30 /*
31 * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical
32 * addresses mapping IO space in CPU physical address space, IO space
33 * resources can be placed anywhere in the 64-bit physical address space.
34 */
35 static inline bool
acpi_iospace_resource_valid(struct resource * res)36 acpi_iospace_resource_valid(struct resource *res) { return true; }
37 #endif
38
39 #if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI)
is_gsi(struct acpi_resource_extended_irq * ext_irq)40 static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
41 {
42 return ext_irq->resource_source.string_length == 0 &&
43 ext_irq->producer_consumer == ACPI_CONSUMER;
44 }
45 #else
is_gsi(struct acpi_resource_extended_irq * ext_irq)46 static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
47 {
48 return true;
49 }
50 #endif
51
acpi_dev_resource_len_valid(u64 start,u64 end,u64 len,bool io)52 static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
53 {
54 u64 reslen = end - start + 1;
55
56 /*
57 * CHECKME: len might be required to check versus a minimum
58 * length as well. 1 for io is fine, but for memory it does
59 * not make any sense at all.
60 * Note: some BIOSes report incorrect length for ACPI address space
61 * descriptor, so remove check of 'reslen == len' to avoid regression.
62 */
63 if (len && reslen && start <= end)
64 return true;
65
66 pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
67 io ? "io" : "mem", start, end, len);
68
69 return false;
70 }
71
acpi_dev_memresource_flags(struct resource * res,u64 len,u8 write_protect)72 static void acpi_dev_memresource_flags(struct resource *res, u64 len,
73 u8 write_protect)
74 {
75 res->flags = IORESOURCE_MEM;
76
77 if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
78 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
79
80 if (write_protect == ACPI_READ_WRITE_MEMORY)
81 res->flags |= IORESOURCE_MEM_WRITEABLE;
82 }
83
acpi_dev_get_memresource(struct resource * res,u64 start,u64 len,u8 write_protect)84 static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
85 u8 write_protect)
86 {
87 res->start = start;
88 res->end = start + len - 1;
89 acpi_dev_memresource_flags(res, len, write_protect);
90 }
91
92 /**
93 * acpi_dev_resource_memory - Extract ACPI memory resource information.
94 * @ares: Input ACPI resource object.
95 * @res: Output generic resource object.
96 *
97 * Check if the given ACPI resource object represents a memory resource and
98 * if that's the case, use the information in it to populate the generic
99 * resource object pointed to by @res.
100 *
101 * Return:
102 * 1) false with res->flags setting to zero: not the expected resource type
103 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
104 * 3) true: valid assigned resource
105 */
acpi_dev_resource_memory(struct acpi_resource * ares,struct resource * res)106 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
107 {
108 struct acpi_resource_memory24 *memory24;
109 struct acpi_resource_memory32 *memory32;
110 struct acpi_resource_fixed_memory32 *fixed_memory32;
111
112 switch (ares->type) {
113 case ACPI_RESOURCE_TYPE_MEMORY24:
114 memory24 = &ares->data.memory24;
115 acpi_dev_get_memresource(res, memory24->minimum << 8,
116 memory24->address_length << 8,
117 memory24->write_protect);
118 break;
119 case ACPI_RESOURCE_TYPE_MEMORY32:
120 memory32 = &ares->data.memory32;
121 acpi_dev_get_memresource(res, memory32->minimum,
122 memory32->address_length,
123 memory32->write_protect);
124 break;
125 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
126 fixed_memory32 = &ares->data.fixed_memory32;
127 acpi_dev_get_memresource(res, fixed_memory32->address,
128 fixed_memory32->address_length,
129 fixed_memory32->write_protect);
130 break;
131 default:
132 res->flags = 0;
133 return false;
134 }
135
136 return !(res->flags & IORESOURCE_DISABLED);
137 }
138 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
139
acpi_dev_ioresource_flags(struct resource * res,u64 len,u8 io_decode,u8 translation_type)140 static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
141 u8 io_decode, u8 translation_type)
142 {
143 res->flags = IORESOURCE_IO;
144
145 if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
146 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
147
148 if (!acpi_iospace_resource_valid(res))
149 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
150
151 if (io_decode == ACPI_DECODE_16)
152 res->flags |= IORESOURCE_IO_16BIT_ADDR;
153 if (translation_type == ACPI_SPARSE_TRANSLATION)
154 res->flags |= IORESOURCE_IO_SPARSE;
155 }
156
acpi_dev_get_ioresource(struct resource * res,u64 start,u64 len,u8 io_decode)157 static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
158 u8 io_decode)
159 {
160 res->start = start;
161 res->end = start + len - 1;
162 acpi_dev_ioresource_flags(res, len, io_decode, 0);
163 }
164
165 /**
166 * acpi_dev_resource_io - Extract ACPI I/O resource information.
167 * @ares: Input ACPI resource object.
168 * @res: Output generic resource object.
169 *
170 * Check if the given ACPI resource object represents an I/O resource and
171 * if that's the case, use the information in it to populate the generic
172 * resource object pointed to by @res.
173 *
174 * Return:
175 * 1) false with res->flags setting to zero: not the expected resource type
176 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
177 * 3) true: valid assigned resource
178 */
acpi_dev_resource_io(struct acpi_resource * ares,struct resource * res)179 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
180 {
181 struct acpi_resource_io *io;
182 struct acpi_resource_fixed_io *fixed_io;
183
184 switch (ares->type) {
185 case ACPI_RESOURCE_TYPE_IO:
186 io = &ares->data.io;
187 acpi_dev_get_ioresource(res, io->minimum,
188 io->address_length,
189 io->io_decode);
190 break;
191 case ACPI_RESOURCE_TYPE_FIXED_IO:
192 fixed_io = &ares->data.fixed_io;
193 acpi_dev_get_ioresource(res, fixed_io->address,
194 fixed_io->address_length,
195 ACPI_DECODE_10);
196 break;
197 default:
198 res->flags = 0;
199 return false;
200 }
201
202 return !(res->flags & IORESOURCE_DISABLED);
203 }
204 EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
205
acpi_decode_space(struct resource_win * win,struct acpi_resource_address * addr,struct acpi_address64_attribute * attr)206 static bool acpi_decode_space(struct resource_win *win,
207 struct acpi_resource_address *addr,
208 struct acpi_address64_attribute *attr)
209 {
210 u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
211 bool wp = addr->info.mem.write_protect;
212 u64 len = attr->address_length;
213 u64 start, end, offset = 0;
214 struct resource *res = &win->res;
215
216 /*
217 * Filter out invalid descriptor according to ACPI Spec 5.0, section
218 * 6.4.3.5 Address Space Resource Descriptors.
219 */
220 if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
221 (addr->min_address_fixed && addr->max_address_fixed && !len))
222 pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
223 addr->min_address_fixed, addr->max_address_fixed, len);
224
225 /*
226 * For bridges that translate addresses across the bridge,
227 * translation_offset is the offset that must be added to the
228 * address on the secondary side to obtain the address on the
229 * primary side. Non-bridge devices must list 0 for all Address
230 * Translation offset bits.
231 */
232 if (addr->producer_consumer == ACPI_PRODUCER)
233 offset = attr->translation_offset;
234 else if (attr->translation_offset)
235 pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
236 attr->translation_offset);
237 start = attr->minimum + offset;
238 end = attr->maximum + offset;
239
240 win->offset = offset;
241 res->start = start;
242 res->end = end;
243 if (sizeof(resource_size_t) < sizeof(u64) &&
244 (offset != win->offset || start != res->start || end != res->end)) {
245 pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
246 attr->minimum, attr->maximum);
247 return false;
248 }
249
250 switch (addr->resource_type) {
251 case ACPI_MEMORY_RANGE:
252 acpi_dev_memresource_flags(res, len, wp);
253 break;
254 case ACPI_IO_RANGE:
255 acpi_dev_ioresource_flags(res, len, iodec,
256 addr->info.io.translation_type);
257 break;
258 case ACPI_BUS_NUMBER_RANGE:
259 res->flags = IORESOURCE_BUS;
260 break;
261 default:
262 return false;
263 }
264
265 if (addr->producer_consumer == ACPI_PRODUCER)
266 res->flags |= IORESOURCE_WINDOW;
267
268 if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
269 res->flags |= IORESOURCE_PREFETCH;
270
271 return !(res->flags & IORESOURCE_DISABLED);
272 }
273
274 /**
275 * acpi_dev_resource_address_space - Extract ACPI address space information.
276 * @ares: Input ACPI resource object.
277 * @win: Output generic resource object.
278 *
279 * Check if the given ACPI resource object represents an address space resource
280 * and if that's the case, use the information in it to populate the generic
281 * resource object pointed to by @win.
282 *
283 * Return:
284 * 1) false with win->res.flags setting to zero: not the expected resource type
285 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
286 * resource
287 * 3) true: valid assigned resource
288 */
acpi_dev_resource_address_space(struct acpi_resource * ares,struct resource_win * win)289 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
290 struct resource_win *win)
291 {
292 struct acpi_resource_address64 addr;
293
294 win->res.flags = 0;
295 if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
296 return false;
297
298 return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
299 &addr.address);
300 }
301 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
302
303 /**
304 * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
305 * @ares: Input ACPI resource object.
306 * @win: Output generic resource object.
307 *
308 * Check if the given ACPI resource object represents an extended address space
309 * resource and if that's the case, use the information in it to populate the
310 * generic resource object pointed to by @win.
311 *
312 * Return:
313 * 1) false with win->res.flags setting to zero: not the expected resource type
314 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
315 * resource
316 * 3) true: valid assigned resource
317 */
acpi_dev_resource_ext_address_space(struct acpi_resource * ares,struct resource_win * win)318 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
319 struct resource_win *win)
320 {
321 struct acpi_resource_extended_address64 *ext_addr;
322
323 win->res.flags = 0;
324 if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
325 return false;
326
327 ext_addr = &ares->data.ext_address64;
328
329 return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
330 &ext_addr->address);
331 }
332 EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
333
334 /**
335 * acpi_dev_irq_flags - Determine IRQ resource flags.
336 * @triggering: Triggering type as provided by ACPI.
337 * @polarity: Interrupt polarity as provided by ACPI.
338 * @shareable: Whether or not the interrupt is shareable.
339 * @wake_capable: Wake capability as provided by ACPI.
340 */
acpi_dev_irq_flags(u8 triggering,u8 polarity,u8 shareable,u8 wake_capable)341 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable, u8 wake_capable)
342 {
343 unsigned long flags;
344
345 if (triggering == ACPI_LEVEL_SENSITIVE)
346 flags = polarity == ACPI_ACTIVE_LOW ?
347 IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
348 else
349 flags = polarity == ACPI_ACTIVE_LOW ?
350 IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
351
352 if (shareable == ACPI_SHARED)
353 flags |= IORESOURCE_IRQ_SHAREABLE;
354
355 if (wake_capable == ACPI_WAKE_CAPABLE)
356 flags |= IORESOURCE_IRQ_WAKECAPABLE;
357
358 return flags | IORESOURCE_IRQ;
359 }
360 EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
361
362 /**
363 * acpi_dev_get_irq_type - Determine irq type.
364 * @triggering: Triggering type as provided by ACPI.
365 * @polarity: Interrupt polarity as provided by ACPI.
366 */
acpi_dev_get_irq_type(int triggering,int polarity)367 unsigned int acpi_dev_get_irq_type(int triggering, int polarity)
368 {
369 switch (polarity) {
370 case ACPI_ACTIVE_LOW:
371 return triggering == ACPI_EDGE_SENSITIVE ?
372 IRQ_TYPE_EDGE_FALLING :
373 IRQ_TYPE_LEVEL_LOW;
374 case ACPI_ACTIVE_HIGH:
375 return triggering == ACPI_EDGE_SENSITIVE ?
376 IRQ_TYPE_EDGE_RISING :
377 IRQ_TYPE_LEVEL_HIGH;
378 case ACPI_ACTIVE_BOTH:
379 if (triggering == ACPI_EDGE_SENSITIVE)
380 return IRQ_TYPE_EDGE_BOTH;
381 fallthrough;
382 default:
383 return IRQ_TYPE_NONE;
384 }
385 }
386 EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
387
388 static const struct dmi_system_id medion_laptop[] = {
389 {
390 .ident = "MEDION P15651",
391 .matches = {
392 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
393 DMI_MATCH(DMI_BOARD_NAME, "M15T"),
394 },
395 },
396 {
397 .ident = "MEDION S17405",
398 .matches = {
399 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
400 DMI_MATCH(DMI_BOARD_NAME, "M17T"),
401 },
402 },
403 {
404 .ident = "MEDION S17413",
405 .matches = {
406 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
407 DMI_MATCH(DMI_BOARD_NAME, "M1xA"),
408 },
409 },
410 { }
411 };
412
413 static const struct dmi_system_id asus_laptop[] = {
414 {
415 .ident = "Asus Vivobook K3402ZA",
416 .matches = {
417 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
418 DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"),
419 },
420 },
421 {
422 .ident = "Asus Vivobook K3502ZA",
423 .matches = {
424 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
425 DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"),
426 },
427 },
428 {
429 .ident = "Asus Vivobook S5402ZA",
430 .matches = {
431 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
432 DMI_MATCH(DMI_BOARD_NAME, "S5402ZA"),
433 },
434 },
435 {
436 .ident = "Asus Vivobook S5602ZA",
437 .matches = {
438 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
439 DMI_MATCH(DMI_BOARD_NAME, "S5602ZA"),
440 },
441 },
442 {
443 .ident = "Asus ExpertBook B1402CBA",
444 .matches = {
445 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
446 DMI_MATCH(DMI_BOARD_NAME, "B1402CBA"),
447 },
448 },
449 {
450 /* Asus ExpertBook B1402CVA */
451 .matches = {
452 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
453 DMI_MATCH(DMI_BOARD_NAME, "B1402CVA"),
454 },
455 },
456 {
457 .ident = "Asus ExpertBook B1502CBA",
458 .matches = {
459 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
460 DMI_MATCH(DMI_BOARD_NAME, "B1502CBA"),
461 },
462 },
463 {
464 .ident = "Asus ExpertBook B2402CBA",
465 .matches = {
466 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
467 DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"),
468 },
469 },
470 {
471 .ident = "Asus ExpertBook B2402FBA",
472 .matches = {
473 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
474 DMI_MATCH(DMI_BOARD_NAME, "B2402FBA"),
475 },
476 },
477 {
478 .ident = "Asus ExpertBook B2502",
479 .matches = {
480 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
481 DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"),
482 },
483 },
484 { }
485 };
486
487 static const struct dmi_system_id tongfang_gm_rg[] = {
488 {
489 .ident = "TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD",
490 .matches = {
491 DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
492 },
493 },
494 { }
495 };
496
497 static const struct dmi_system_id maingear_laptop[] = {
498 {
499 .ident = "MAINGEAR Vector Pro 2 15",
500 .matches = {
501 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
502 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"),
503 }
504 },
505 {
506 /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */
507 .matches = {
508 DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"),
509 },
510 },
511 {
512 /* TongFang GMxXGxx sold as Eluktronics Inc. RP-15 */
513 .matches = {
514 DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."),
515 DMI_MATCH(DMI_BOARD_NAME, "RP-15"),
516 },
517 },
518 {
519 /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */
520 .matches = {
521 DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"),
522 },
523 },
524 {
525 .ident = "MAINGEAR Vector Pro 2 17",
526 .matches = {
527 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
528 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"),
529 },
530 },
531 { }
532 };
533
534 static const struct dmi_system_id pcspecialist_laptop[] = {
535 {
536 /* TongFang GM6BGEQ / PCSpecialist Elimina Pro 16 M, RTX 3050 */
537 .matches = {
538 DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"),
539 },
540 },
541 {
542 /* TongFang GM6BG5Q, RTX 4050 */
543 .matches = {
544 DMI_MATCH(DMI_BOARD_NAME, "GM6BG5Q"),
545 },
546 },
547 {
548 /* TongFang GM6BG0Q / PCSpecialist Elimina Pro 16 M, RTX 4060 */
549 .matches = {
550 DMI_MATCH(DMI_BOARD_NAME, "GM6BG0Q"),
551 },
552 },
553 {
554 /* Infinity E15-5A165-BM */
555 .matches = {
556 DMI_MATCH(DMI_BOARD_NAME, "GM5RG1E0009COM"),
557 },
558 },
559 {
560 /* Infinity E15-5A305-1M */
561 .matches = {
562 DMI_MATCH(DMI_BOARD_NAME, "GM5RGEE0016COM"),
563 },
564 },
565 {
566 /* Lunnen Ground 15 / AMD Ryzen 5 5500U */
567 .matches = {
568 DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"),
569 DMI_MATCH(DMI_BOARD_NAME, "LLL5DAW"),
570 },
571 },
572 {
573 /* Lunnen Ground 16 / AMD Ryzen 7 5800U */
574 .matches = {
575 DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"),
576 DMI_MATCH(DMI_BOARD_NAME, "LL6FA"),
577 },
578 },
579 {
580 /* MAIBENBEN X577 */
581 .matches = {
582 DMI_MATCH(DMI_SYS_VENDOR, "MAIBENBEN"),
583 DMI_MATCH(DMI_BOARD_NAME, "X577"),
584 },
585 },
586 { }
587 };
588
589 static const struct dmi_system_id lg_laptop[] = {
590 {
591 .ident = "LG Electronics 17U70P",
592 .matches = {
593 DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
594 DMI_MATCH(DMI_BOARD_NAME, "17U70P"),
595 },
596 },
597 { }
598 };
599
600 struct irq_override_cmp {
601 const struct dmi_system_id *system;
602 unsigned char irq;
603 unsigned char triggering;
604 unsigned char polarity;
605 unsigned char shareable;
606 bool override;
607 };
608
609 static const struct irq_override_cmp override_table[] = {
610 { medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
611 { asus_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
612 { tongfang_gm_rg, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
613 { maingear_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
614 { pcspecialist_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
615 { lg_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
616 };
617
acpi_dev_irq_override(u32 gsi,u8 triggering,u8 polarity,u8 shareable)618 static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
619 u8 shareable)
620 {
621 int i;
622
623 for (i = 0; i < ARRAY_SIZE(override_table); i++) {
624 const struct irq_override_cmp *entry = &override_table[i];
625
626 if (dmi_check_system(entry->system) &&
627 entry->irq == gsi &&
628 entry->triggering == triggering &&
629 entry->polarity == polarity &&
630 entry->shareable == shareable)
631 return entry->override;
632 }
633
634 #ifdef CONFIG_X86
635 /*
636 * Always use the MADT override info, except for the i8042 PS/2 ctrl
637 * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes
638 * be used otherwise PS/2 keyboards / mice will not work.
639 */
640 if (gsi != 1 && gsi != 12)
641 return true;
642
643 /* If the override comes from an INT_SRC_OVR MADT entry, honor it. */
644 if (acpi_int_src_ovr[gsi])
645 return true;
646
647 /*
648 * IRQ override isn't needed on modern AMD Zen systems and
649 * this override breaks active low IRQs on AMD Ryzen 6000 and
650 * newer systems. Skip it.
651 */
652 if (boot_cpu_has(X86_FEATURE_ZEN))
653 return false;
654 #endif
655
656 return true;
657 }
658
acpi_dev_get_irqresource(struct resource * res,u32 gsi,u8 triggering,u8 polarity,u8 shareable,u8 wake_capable,bool check_override)659 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
660 u8 triggering, u8 polarity, u8 shareable,
661 u8 wake_capable, bool check_override)
662 {
663 int irq, p, t;
664
665 if (!valid_IRQ(gsi)) {
666 irqresource_disabled(res, gsi);
667 return;
668 }
669
670 /*
671 * In IO-APIC mode, use overridden attribute. Two reasons:
672 * 1. BIOS bug in DSDT
673 * 2. BIOS uses IO-APIC mode Interrupt Source Override
674 *
675 * We do this only if we are dealing with IRQ() or IRQNoFlags()
676 * resource (the legacy ISA resources). With modern ACPI 5 devices
677 * using extended IRQ descriptors we take the IRQ configuration
678 * from _CRS directly.
679 */
680 if (check_override &&
681 acpi_dev_irq_override(gsi, triggering, polarity, shareable) &&
682 !acpi_get_override_irq(gsi, &t, &p)) {
683 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
684 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
685
686 if (triggering != trig || polarity != pol) {
687 pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi,
688 t ? "level" : "edge",
689 trig == triggering ? "" : "(!)",
690 p ? "low" : "high",
691 pol == polarity ? "" : "(!)");
692 triggering = trig;
693 polarity = pol;
694 }
695 }
696
697 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
698 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
699 if (irq >= 0) {
700 res->start = irq;
701 res->end = irq;
702 } else {
703 irqresource_disabled(res, gsi);
704 }
705 }
706
707 /**
708 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
709 * @ares: Input ACPI resource object.
710 * @index: Index into the array of GSIs represented by the resource.
711 * @res: Output generic resource object.
712 *
713 * Check if the given ACPI resource object represents an interrupt resource
714 * and @index does not exceed the resource's interrupt count (true is returned
715 * in that case regardless of the results of the other checks)). If that's the
716 * case, register the GSI corresponding to @index from the array of interrupts
717 * represented by the resource and populate the generic resource object pointed
718 * to by @res accordingly. If the registration of the GSI is not successful,
719 * IORESOURCE_DISABLED will be set it that object's flags.
720 *
721 * Return:
722 * 1) false with res->flags setting to zero: not the expected resource type
723 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
724 * 3) true: valid assigned resource
725 */
acpi_dev_resource_interrupt(struct acpi_resource * ares,int index,struct resource * res)726 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
727 struct resource *res)
728 {
729 struct acpi_resource_irq *irq;
730 struct acpi_resource_extended_irq *ext_irq;
731
732 switch (ares->type) {
733 case ACPI_RESOURCE_TYPE_IRQ:
734 /*
735 * Per spec, only one interrupt per descriptor is allowed in
736 * _CRS, but some firmware violates this, so parse them all.
737 */
738 irq = &ares->data.irq;
739 if (index >= irq->interrupt_count) {
740 irqresource_disabled(res, 0);
741 return false;
742 }
743 acpi_dev_get_irqresource(res, irq->interrupts[index],
744 irq->triggering, irq->polarity,
745 irq->shareable, irq->wake_capable,
746 true);
747 break;
748 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
749 ext_irq = &ares->data.extended_irq;
750 if (index >= ext_irq->interrupt_count) {
751 irqresource_disabled(res, 0);
752 return false;
753 }
754 if (is_gsi(ext_irq))
755 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
756 ext_irq->triggering, ext_irq->polarity,
757 ext_irq->shareable, ext_irq->wake_capable,
758 false);
759 else
760 irqresource_disabled(res, 0);
761 break;
762 default:
763 res->flags = 0;
764 return false;
765 }
766
767 return true;
768 }
769 EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
770
771 /**
772 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
773 * @list: The head of the resource list to free.
774 */
acpi_dev_free_resource_list(struct list_head * list)775 void acpi_dev_free_resource_list(struct list_head *list)
776 {
777 resource_list_free(list);
778 }
779 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
780
781 struct res_proc_context {
782 struct list_head *list;
783 int (*preproc)(struct acpi_resource *, void *);
784 void *preproc_data;
785 int count;
786 int error;
787 };
788
acpi_dev_new_resource_entry(struct resource_win * win,struct res_proc_context * c)789 static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
790 struct res_proc_context *c)
791 {
792 struct resource_entry *rentry;
793
794 rentry = resource_list_create_entry(NULL, 0);
795 if (!rentry) {
796 c->error = -ENOMEM;
797 return AE_NO_MEMORY;
798 }
799 *rentry->res = win->res;
800 rentry->offset = win->offset;
801 resource_list_add_tail(rentry, c->list);
802 c->count++;
803 return AE_OK;
804 }
805
acpi_dev_process_resource(struct acpi_resource * ares,void * context)806 static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
807 void *context)
808 {
809 struct res_proc_context *c = context;
810 struct resource_win win;
811 struct resource *res = &win.res;
812 int i;
813
814 if (c->preproc) {
815 int ret;
816
817 ret = c->preproc(ares, c->preproc_data);
818 if (ret < 0) {
819 c->error = ret;
820 return AE_ABORT_METHOD;
821 } else if (ret > 0) {
822 return AE_OK;
823 }
824 }
825
826 memset(&win, 0, sizeof(win));
827
828 if (acpi_dev_resource_memory(ares, res)
829 || acpi_dev_resource_io(ares, res)
830 || acpi_dev_resource_address_space(ares, &win)
831 || acpi_dev_resource_ext_address_space(ares, &win))
832 return acpi_dev_new_resource_entry(&win, c);
833
834 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
835 acpi_status status;
836
837 status = acpi_dev_new_resource_entry(&win, c);
838 if (ACPI_FAILURE(status))
839 return status;
840 }
841
842 return AE_OK;
843 }
844
__acpi_dev_get_resources(struct acpi_device * adev,struct list_head * list,int (* preproc)(struct acpi_resource *,void *),void * preproc_data,char * method)845 static int __acpi_dev_get_resources(struct acpi_device *adev,
846 struct list_head *list,
847 int (*preproc)(struct acpi_resource *, void *),
848 void *preproc_data, char *method)
849 {
850 struct res_proc_context c;
851 acpi_status status;
852
853 if (!adev || !adev->handle || !list_empty(list))
854 return -EINVAL;
855
856 if (!acpi_has_method(adev->handle, method))
857 return 0;
858
859 c.list = list;
860 c.preproc = preproc;
861 c.preproc_data = preproc_data;
862 c.count = 0;
863 c.error = 0;
864 status = acpi_walk_resources(adev->handle, method,
865 acpi_dev_process_resource, &c);
866 if (ACPI_FAILURE(status)) {
867 acpi_dev_free_resource_list(list);
868 return c.error ? c.error : -EIO;
869 }
870
871 return c.count;
872 }
873
874 /**
875 * acpi_dev_get_resources - Get current resources of a device.
876 * @adev: ACPI device node to get the resources for.
877 * @list: Head of the resultant list of resources (must be empty).
878 * @preproc: The caller's preprocessing routine.
879 * @preproc_data: Pointer passed to the caller's preprocessing routine.
880 *
881 * Evaluate the _CRS method for the given device node and process its output by
882 * (1) executing the @preproc() routine provided by the caller, passing the
883 * resource pointer and @preproc_data to it as arguments, for each ACPI resource
884 * returned and (2) converting all of the returned ACPI resources into struct
885 * resource objects if possible. If the return value of @preproc() in step (1)
886 * is different from 0, step (2) is not applied to the given ACPI resource and
887 * if that value is negative, the whole processing is aborted and that value is
888 * returned as the final error code.
889 *
890 * The resultant struct resource objects are put on the list pointed to by
891 * @list, that must be empty initially, as members of struct resource_entry
892 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
893 * free that list.
894 *
895 * The number of resources in the output list is returned on success, an error
896 * code reflecting the error condition is returned otherwise.
897 */
acpi_dev_get_resources(struct acpi_device * adev,struct list_head * list,int (* preproc)(struct acpi_resource *,void *),void * preproc_data)898 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
899 int (*preproc)(struct acpi_resource *, void *),
900 void *preproc_data)
901 {
902 return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
903 METHOD_NAME__CRS);
904 }
905 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
906
is_memory(struct acpi_resource * ares,void * not_used)907 static int is_memory(struct acpi_resource *ares, void *not_used)
908 {
909 struct resource_win win;
910 struct resource *res = &win.res;
911
912 memset(&win, 0, sizeof(win));
913
914 if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM))
915 return 1;
916
917 return !(acpi_dev_resource_memory(ares, res)
918 || acpi_dev_resource_address_space(ares, &win)
919 || acpi_dev_resource_ext_address_space(ares, &win));
920 }
921
922 /**
923 * acpi_dev_get_dma_resources - Get current DMA resources of a device.
924 * @adev: ACPI device node to get the resources for.
925 * @list: Head of the resultant list of resources (must be empty).
926 *
927 * Evaluate the _DMA method for the given device node and process its
928 * output.
929 *
930 * The resultant struct resource objects are put on the list pointed to
931 * by @list, that must be empty initially, as members of struct
932 * resource_entry objects. Callers of this routine should use
933 * %acpi_dev_free_resource_list() to free that list.
934 *
935 * The number of resources in the output list is returned on success,
936 * an error code reflecting the error condition is returned otherwise.
937 */
acpi_dev_get_dma_resources(struct acpi_device * adev,struct list_head * list)938 int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
939 {
940 return __acpi_dev_get_resources(adev, list, is_memory, NULL,
941 METHOD_NAME__DMA);
942 }
943 EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
944
945 /**
946 * acpi_dev_get_memory_resources - Get current memory resources of a device.
947 * @adev: ACPI device node to get the resources for.
948 * @list: Head of the resultant list of resources (must be empty).
949 *
950 * This is a helper function that locates all memory type resources of @adev
951 * with acpi_dev_get_resources().
952 *
953 * The number of resources in the output list is returned on success, an error
954 * code reflecting the error condition is returned otherwise.
955 */
acpi_dev_get_memory_resources(struct acpi_device * adev,struct list_head * list)956 int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
957 {
958 return acpi_dev_get_resources(adev, list, is_memory, NULL);
959 }
960 EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
961
962 /**
963 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
964 * types
965 * @ares: Input ACPI resource object.
966 * @types: Valid resource types of IORESOURCE_XXX
967 *
968 * This is a helper function to support acpi_dev_get_resources(), which filters
969 * ACPI resource objects according to resource types.
970 */
acpi_dev_filter_resource_type(struct acpi_resource * ares,unsigned long types)971 int acpi_dev_filter_resource_type(struct acpi_resource *ares,
972 unsigned long types)
973 {
974 unsigned long type = 0;
975
976 switch (ares->type) {
977 case ACPI_RESOURCE_TYPE_MEMORY24:
978 case ACPI_RESOURCE_TYPE_MEMORY32:
979 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
980 type = IORESOURCE_MEM;
981 break;
982 case ACPI_RESOURCE_TYPE_IO:
983 case ACPI_RESOURCE_TYPE_FIXED_IO:
984 type = IORESOURCE_IO;
985 break;
986 case ACPI_RESOURCE_TYPE_IRQ:
987 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
988 type = IORESOURCE_IRQ;
989 break;
990 case ACPI_RESOURCE_TYPE_DMA:
991 case ACPI_RESOURCE_TYPE_FIXED_DMA:
992 type = IORESOURCE_DMA;
993 break;
994 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
995 type = IORESOURCE_REG;
996 break;
997 case ACPI_RESOURCE_TYPE_ADDRESS16:
998 case ACPI_RESOURCE_TYPE_ADDRESS32:
999 case ACPI_RESOURCE_TYPE_ADDRESS64:
1000 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
1001 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
1002 type = IORESOURCE_MEM;
1003 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
1004 type = IORESOURCE_IO;
1005 else if (ares->data.address.resource_type ==
1006 ACPI_BUS_NUMBER_RANGE)
1007 type = IORESOURCE_BUS;
1008 break;
1009 default:
1010 break;
1011 }
1012
1013 return (type & types) ? 0 : 1;
1014 }
1015 EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
1016
acpi_dev_consumes_res(struct acpi_device * adev,struct resource * res)1017 static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
1018 {
1019 struct list_head resource_list;
1020 struct resource_entry *rentry;
1021 int ret, found = 0;
1022
1023 INIT_LIST_HEAD(&resource_list);
1024 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
1025 if (ret < 0)
1026 return 0;
1027
1028 list_for_each_entry(rentry, &resource_list, node) {
1029 if (resource_contains(rentry->res, res)) {
1030 found = 1;
1031 break;
1032 }
1033
1034 }
1035
1036 acpi_dev_free_resource_list(&resource_list);
1037 return found;
1038 }
1039
acpi_res_consumer_cb(acpi_handle handle,u32 depth,void * context,void ** ret)1040 static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
1041 void *context, void **ret)
1042 {
1043 struct resource *res = context;
1044 struct acpi_device **consumer = (struct acpi_device **) ret;
1045 struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
1046
1047 if (!adev)
1048 return AE_OK;
1049
1050 if (acpi_dev_consumes_res(adev, res)) {
1051 *consumer = adev;
1052 return AE_CTRL_TERMINATE;
1053 }
1054
1055 return AE_OK;
1056 }
1057
1058 /**
1059 * acpi_resource_consumer - Find the ACPI device that consumes @res.
1060 * @res: Resource to search for.
1061 *
1062 * Search the current resource settings (_CRS) of every ACPI device node
1063 * for @res. If we find an ACPI device whose _CRS includes @res, return
1064 * it. Otherwise, return NULL.
1065 */
acpi_resource_consumer(struct resource * res)1066 struct acpi_device *acpi_resource_consumer(struct resource *res)
1067 {
1068 struct acpi_device *consumer = NULL;
1069
1070 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);
1071 return consumer;
1072 }
1073