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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))
23static 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 */
35static inline bool
36acpi_iospace_resource_valid(struct resource *res) { return true; }
37#endif
38
39#if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI)
40static 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
46static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
47{
48 return true;
49}
50#endif
51
52static 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
72static 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
84static 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 */
106bool 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}
138EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
139
140static 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
157static 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 */
179bool 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}
204EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
205
206static 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
254 if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
255 res->flags |= IORESOURCE_PREFETCH;
256 break;
257 case ACPI_IO_RANGE:
258 acpi_dev_ioresource_flags(res, len, iodec,
259 addr->info.io.translation_type);
260 break;
261 case ACPI_BUS_NUMBER_RANGE:
262 res->flags = IORESOURCE_BUS;
263 break;
264 default:
265 return false;
266 }
267
268 if (addr->producer_consumer == ACPI_PRODUCER)
269 res->flags |= IORESOURCE_WINDOW;
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 */
289bool 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}
301EXPORT_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 */
318bool 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}
332EXPORT_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 */
341unsigned 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}
360EXPORT_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 */
367unsigned 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}
386EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
387
388/*
389 * DMI matches for boards where the DSDT specifies the kbd IRQ as
390 * level active-low and using the override changes this to rising edge,
391 * stopping the keyboard from working.
392 */
393static const struct dmi_system_id irq1_level_low_skip_override[] = {
394 {
395 /* MEDION P15651 */
396 .matches = {
397 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
398 DMI_MATCH(DMI_BOARD_NAME, "M15T"),
399 },
400 },
401 {
402 /* MEDION S17405 */
403 .matches = {
404 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
405 DMI_MATCH(DMI_BOARD_NAME, "M17T"),
406 },
407 },
408 {
409 /* MEDION S17413 */
410 .matches = {
411 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
412 DMI_MATCH(DMI_BOARD_NAME, "M1xA"),
413 },
414 },
415 {
416 /* Asus Vivobook K3402ZA */
417 .matches = {
418 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
419 DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"),
420 },
421 },
422 {
423 /* Asus Vivobook K3502ZA */
424 .matches = {
425 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
426 DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"),
427 },
428 },
429 {
430 /* Asus Vivobook S5402ZA */
431 .matches = {
432 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
433 DMI_MATCH(DMI_BOARD_NAME, "S5402ZA"),
434 },
435 },
436 {
437 /* Asus Vivobook S5602ZA */
438 .matches = {
439 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
440 DMI_MATCH(DMI_BOARD_NAME, "S5602ZA"),
441 },
442 },
443 {
444 /* Asus Vivobook X1504VAP */
445 .matches = {
446 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
447 DMI_MATCH(DMI_BOARD_NAME, "X1504VAP"),
448 },
449 },
450 {
451 /* Asus Vivobook X1704VAP */
452 .matches = {
453 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
454 DMI_MATCH(DMI_BOARD_NAME, "X1704VAP"),
455 },
456 },
457 {
458 /* Asus ExpertBook B1402C* */
459 .matches = {
460 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
461 DMI_MATCH(DMI_BOARD_NAME, "B1402C"),
462 },
463 },
464 {
465 /* Asus ExpertBook B1502C* */
466 .matches = {
467 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
468 DMI_MATCH(DMI_BOARD_NAME, "B1502C"),
469 },
470 },
471 {
472 /* Asus ExpertBook B2402 (B2402CBA / B2402FBA / B2402CVA / B2402FVA) */
473 .matches = {
474 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
475 DMI_MATCH(DMI_BOARD_NAME, "B2402"),
476 },
477 },
478 {
479 /* Asus ExpertBook B2502 (B2502CBA / B2502FBA / B2502CVA / B2502FVA) */
480 .matches = {
481 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
482 DMI_MATCH(DMI_BOARD_NAME, "B2502"),
483 },
484 },
485 {
486 /* Asus Vivobook Go E1404GA* */
487 .matches = {
488 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
489 DMI_MATCH(DMI_BOARD_NAME, "E1404GA"),
490 },
491 },
492 {
493 /* Asus Vivobook E1504GA* */
494 .matches = {
495 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
496 DMI_MATCH(DMI_BOARD_NAME, "E1504GA"),
497 },
498 },
499 {
500 /* Asus Vivobook Pro N6506M* */
501 .matches = {
502 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
503 DMI_MATCH(DMI_BOARD_NAME, "N6506M"),
504 },
505 },
506 {
507 /* LG Electronics 17U70P */
508 .matches = {
509 DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
510 DMI_MATCH(DMI_BOARD_NAME, "17U70P"),
511 },
512 },
513 {
514 /* LG Electronics 16T90SP */
515 .matches = {
516 DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
517 DMI_MATCH(DMI_BOARD_NAME, "16T90SP"),
518 },
519 },
520 { }
521};
522
523/*
524 * DMI matches for AMD Zen boards where the DSDT specifies the kbd IRQ
525 * as falling edge and this must be overridden to rising edge,
526 * to have a working keyboard.
527 */
528static const struct dmi_system_id irq1_edge_low_force_override[] = {
529 {
530 /* MECHREV Jiaolong17KS Series GM7XG0M */
531 .matches = {
532 DMI_MATCH(DMI_BOARD_NAME, "GM7XG0M"),
533 },
534 },
535 {
536 /* XMG APEX 17 (M23) */
537 .matches = {
538 DMI_MATCH(DMI_BOARD_NAME, "GMxBGxx"),
539 },
540 },
541 {
542 /* TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD */
543 .matches = {
544 DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
545 },
546 },
547 {
548 /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */
549 .matches = {
550 DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"),
551 },
552 },
553 {
554 /* TongFang GMxXGxX/TUXEDO Polaris 15 Gen5 AMD */
555 .matches = {
556 DMI_MATCH(DMI_BOARD_NAME, "GMxXGxX"),
557 },
558 },
559 {
560 /* TongFang GMxXGxx sold as Eluktronics Inc. RP-15 */
561 .matches = {
562 DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."),
563 DMI_MATCH(DMI_BOARD_NAME, "RP-15"),
564 },
565 },
566 {
567 /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */
568 .matches = {
569 DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"),
570 },
571 },
572 {
573 /* MAINGEAR Vector Pro 2 15 */
574 .matches = {
575 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
576 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"),
577 }
578 },
579 {
580 /* MAINGEAR Vector Pro 2 17 */
581 .matches = {
582 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
583 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"),
584 },
585 },
586 {
587 /* TongFang GM6BGEQ / PCSpecialist Elimina Pro 16 M, RTX 3050 */
588 .matches = {
589 DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"),
590 },
591 },
592 {
593 /* TongFang GM6BG5Q, RTX 4050 */
594 .matches = {
595 DMI_MATCH(DMI_BOARD_NAME, "GM6BG5Q"),
596 },
597 },
598 {
599 /* TongFang GM6BG0Q / PCSpecialist Elimina Pro 16 M, RTX 4060 */
600 .matches = {
601 DMI_MATCH(DMI_BOARD_NAME, "GM6BG0Q"),
602 },
603 },
604 {
605 /* Infinity E15-5A165-BM */
606 .matches = {
607 DMI_MATCH(DMI_BOARD_NAME, "GM5RG1E0009COM"),
608 },
609 },
610 {
611 /* Infinity E15-5A305-1M */
612 .matches = {
613 DMI_MATCH(DMI_BOARD_NAME, "GM5RGEE0016COM"),
614 },
615 },
616 {
617 /* Lunnen Ground 15 / AMD Ryzen 5 5500U */
618 .matches = {
619 DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"),
620 DMI_MATCH(DMI_BOARD_NAME, "LLL5DAW"),
621 },
622 },
623 {
624 /* Lunnen Ground 16 / AMD Ryzen 7 5800U */
625 .matches = {
626 DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"),
627 DMI_MATCH(DMI_BOARD_NAME, "LL6FA"),
628 },
629 },
630 {
631 /* MAIBENBEN X577 */
632 .matches = {
633 DMI_MATCH(DMI_SYS_VENDOR, "MAIBENBEN"),
634 DMI_MATCH(DMI_BOARD_NAME, "X577"),
635 },
636 },
637 {
638 /* Maibenben X565 */
639 .matches = {
640 DMI_MATCH(DMI_SYS_VENDOR, "MAIBENBEN"),
641 DMI_MATCH(DMI_BOARD_NAME, "X565"),
642 },
643 },
644 {
645 /* TongFang GXxHRXx/TUXEDO InfinityBook Pro Gen9 AMD */
646 .matches = {
647 DMI_MATCH(DMI_BOARD_NAME, "GXxHRXx"),
648 },
649 },
650 {
651 /* TongFang GMxHGxx/TUXEDO Stellaris Slim Gen1 AMD */
652 .matches = {
653 DMI_MATCH(DMI_BOARD_NAME, "GMxHGxx"),
654 },
655 },
656 {
657 /*
658 * TongFang GM5HG0A in case of the SKIKK Vanaheim relabel the
659 * board-name is changed, so check OEM strings instead. Note
660 * OEM string matches are always exact matches.
661 * https://bugzilla.kernel.org/show_bug.cgi?id=219614
662 */
663 .matches = {
664 DMI_EXACT_MATCH(DMI_OEM_STRING, "GM5HG0A"),
665 },
666 },
667 { }
668};
669
670struct irq_override_cmp {
671 const struct dmi_system_id *system;
672 unsigned char irq;
673 unsigned char triggering;
674 unsigned char polarity;
675 unsigned char shareable;
676 bool override;
677};
678
679static const struct irq_override_cmp override_table[] = {
680 { irq1_level_low_skip_override, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
681 { irq1_edge_low_force_override, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
682};
683
684static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
685 u8 shareable)
686{
687 int i;
688
689 for (i = 0; i < ARRAY_SIZE(override_table); i++) {
690 const struct irq_override_cmp *entry = &override_table[i];
691
692 if (entry->irq == gsi &&
693 entry->triggering == triggering &&
694 entry->polarity == polarity &&
695 entry->shareable == shareable &&
696 dmi_check_system(entry->system))
697 return entry->override;
698 }
699
700#ifdef CONFIG_X86
701 /*
702 * Always use the MADT override info, except for the i8042 PS/2 ctrl
703 * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes
704 * be used otherwise PS/2 keyboards / mice will not work.
705 */
706 if (gsi != 1 && gsi != 12)
707 return true;
708
709 /* If the override comes from an INT_SRC_OVR MADT entry, honor it. */
710 if (acpi_int_src_ovr[gsi])
711 return true;
712
713 /*
714 * IRQ override isn't needed on modern AMD Zen systems and
715 * this override breaks active low IRQs on AMD Ryzen 6000 and
716 * newer systems. Skip it.
717 */
718 if (boot_cpu_has(X86_FEATURE_ZEN))
719 return false;
720#endif
721
722 return true;
723}
724
725static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
726 u8 triggering, u8 polarity, u8 shareable,
727 u8 wake_capable, bool check_override)
728{
729 int irq, p, t;
730
731 if (!valid_IRQ(gsi)) {
732 irqresource_disabled(res, gsi);
733 return;
734 }
735
736 /*
737 * In IO-APIC mode, use overridden attribute. Two reasons:
738 * 1. BIOS bug in DSDT
739 * 2. BIOS uses IO-APIC mode Interrupt Source Override
740 *
741 * We do this only if we are dealing with IRQ() or IRQNoFlags()
742 * resource (the legacy ISA resources). With modern ACPI 5 devices
743 * using extended IRQ descriptors we take the IRQ configuration
744 * from _CRS directly.
745 */
746 if (check_override &&
747 acpi_dev_irq_override(gsi, triggering, polarity, shareable) &&
748 !acpi_get_override_irq(gsi, &t, &p)) {
749 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
750 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
751
752 if (triggering != trig || polarity != pol) {
753 pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi,
754 t ? "level" : "edge",
755 trig == triggering ? "" : "(!)",
756 p ? "low" : "high",
757 pol == polarity ? "" : "(!)");
758 triggering = trig;
759 polarity = pol;
760 }
761 }
762
763 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
764 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
765 if (irq >= 0) {
766 res->start = irq;
767 res->end = irq;
768 } else {
769 irqresource_disabled(res, gsi);
770 }
771}
772
773/**
774 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
775 * @ares: Input ACPI resource object.
776 * @index: Index into the array of GSIs represented by the resource.
777 * @res: Output generic resource object.
778 *
779 * Check if the given ACPI resource object represents an interrupt resource
780 * and @index does not exceed the resource's interrupt count (true is returned
781 * in that case regardless of the results of the other checks)). If that's the
782 * case, register the GSI corresponding to @index from the array of interrupts
783 * represented by the resource and populate the generic resource object pointed
784 * to by @res accordingly. If the registration of the GSI is not successful,
785 * IORESOURCE_DISABLED will be set it that object's flags.
786 *
787 * Return:
788 * 1) false with res->flags setting to zero: not the expected resource type
789 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
790 * 3) true: valid assigned resource
791 */
792bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
793 struct resource *res)
794{
795 struct acpi_resource_irq *irq;
796 struct acpi_resource_extended_irq *ext_irq;
797
798 switch (ares->type) {
799 case ACPI_RESOURCE_TYPE_IRQ:
800 /*
801 * Per spec, only one interrupt per descriptor is allowed in
802 * _CRS, but some firmware violates this, so parse them all.
803 */
804 irq = &ares->data.irq;
805 if (index >= irq->interrupt_count) {
806 irqresource_disabled(res, 0);
807 return false;
808 }
809 acpi_dev_get_irqresource(res, irq->interrupts[index],
810 irq->triggering, irq->polarity,
811 irq->shareable, irq->wake_capable,
812 true);
813 break;
814 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
815 ext_irq = &ares->data.extended_irq;
816 if (index >= ext_irq->interrupt_count) {
817 irqresource_disabled(res, 0);
818 return false;
819 }
820 if (is_gsi(ext_irq))
821 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
822 ext_irq->triggering, ext_irq->polarity,
823 ext_irq->shareable, ext_irq->wake_capable,
824 false);
825 else
826 irqresource_disabled(res, 0);
827 break;
828 default:
829 res->flags = 0;
830 return false;
831 }
832
833 return true;
834}
835EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
836
837/**
838 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
839 * @list: The head of the resource list to free.
840 */
841void acpi_dev_free_resource_list(struct list_head *list)
842{
843 resource_list_free(list);
844}
845EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
846
847struct res_proc_context {
848 struct list_head *list;
849 int (*preproc)(struct acpi_resource *, void *);
850 void *preproc_data;
851 int count;
852 int error;
853};
854
855static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
856 struct res_proc_context *c)
857{
858 struct resource_entry *rentry;
859
860 rentry = resource_list_create_entry(NULL, 0);
861 if (!rentry) {
862 c->error = -ENOMEM;
863 return AE_NO_MEMORY;
864 }
865 *rentry->res = win->res;
866 rentry->offset = win->offset;
867 resource_list_add_tail(rentry, c->list);
868 c->count++;
869 return AE_OK;
870}
871
872static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
873 void *context)
874{
875 struct res_proc_context *c = context;
876 struct resource_win win;
877 struct resource *res = &win.res;
878 int i;
879
880 if (c->preproc) {
881 int ret;
882
883 ret = c->preproc(ares, c->preproc_data);
884 if (ret < 0) {
885 c->error = ret;
886 return AE_ABORT_METHOD;
887 } else if (ret > 0) {
888 return AE_OK;
889 }
890 }
891
892 memset(&win, 0, sizeof(win));
893
894 if (acpi_dev_resource_memory(ares, res)
895 || acpi_dev_resource_io(ares, res)
896 || acpi_dev_resource_address_space(ares, &win)
897 || acpi_dev_resource_ext_address_space(ares, &win))
898 return acpi_dev_new_resource_entry(&win, c);
899
900 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
901 acpi_status status;
902
903 status = acpi_dev_new_resource_entry(&win, c);
904 if (ACPI_FAILURE(status))
905 return status;
906 }
907
908 return AE_OK;
909}
910
911static int __acpi_dev_get_resources(struct acpi_device *adev,
912 struct list_head *list,
913 int (*preproc)(struct acpi_resource *, void *),
914 void *preproc_data, char *method)
915{
916 struct res_proc_context c;
917 acpi_status status;
918
919 if (!adev || !adev->handle || !list_empty(list))
920 return -EINVAL;
921
922 if (!acpi_has_method(adev->handle, method))
923 return 0;
924
925 c.list = list;
926 c.preproc = preproc;
927 c.preproc_data = preproc_data;
928 c.count = 0;
929 c.error = 0;
930 status = acpi_walk_resources(adev->handle, method,
931 acpi_dev_process_resource, &c);
932 if (ACPI_FAILURE(status)) {
933 acpi_dev_free_resource_list(list);
934 return c.error ? c.error : -EIO;
935 }
936
937 return c.count;
938}
939
940/**
941 * acpi_dev_get_resources - Get current resources of a device.
942 * @adev: ACPI device node to get the resources for.
943 * @list: Head of the resultant list of resources (must be empty).
944 * @preproc: The caller's preprocessing routine.
945 * @preproc_data: Pointer passed to the caller's preprocessing routine.
946 *
947 * Evaluate the _CRS method for the given device node and process its output by
948 * (1) executing the @preproc() routine provided by the caller, passing the
949 * resource pointer and @preproc_data to it as arguments, for each ACPI resource
950 * returned and (2) converting all of the returned ACPI resources into struct
951 * resource objects if possible. If the return value of @preproc() in step (1)
952 * is different from 0, step (2) is not applied to the given ACPI resource and
953 * if that value is negative, the whole processing is aborted and that value is
954 * returned as the final error code.
955 *
956 * The resultant struct resource objects are put on the list pointed to by
957 * @list, that must be empty initially, as members of struct resource_entry
958 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
959 * free that list.
960 *
961 * The number of resources in the output list is returned on success, an error
962 * code reflecting the error condition is returned otherwise.
963 */
964int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
965 int (*preproc)(struct acpi_resource *, void *),
966 void *preproc_data)
967{
968 return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
969 METHOD_NAME__CRS);
970}
971EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
972
973static int is_memory(struct acpi_resource *ares, void *not_used)
974{
975 struct resource_win win;
976 struct resource *res = &win.res;
977
978 memset(&win, 0, sizeof(win));
979
980 if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM))
981 return 1;
982
983 return !(acpi_dev_resource_memory(ares, res)
984 || acpi_dev_resource_address_space(ares, &win)
985 || acpi_dev_resource_ext_address_space(ares, &win));
986}
987
988/**
989 * acpi_dev_get_dma_resources - Get current DMA resources of a device.
990 * @adev: ACPI device node to get the resources for.
991 * @list: Head of the resultant list of resources (must be empty).
992 *
993 * Evaluate the _DMA method for the given device node and process its
994 * output.
995 *
996 * The resultant struct resource objects are put on the list pointed to
997 * by @list, that must be empty initially, as members of struct
998 * resource_entry objects. Callers of this routine should use
999 * %acpi_dev_free_resource_list() to free that list.
1000 *
1001 * The number of resources in the output list is returned on success,
1002 * an error code reflecting the error condition is returned otherwise.
1003 */
1004int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
1005{
1006 return __acpi_dev_get_resources(adev, list, is_memory, NULL,
1007 METHOD_NAME__DMA);
1008}
1009EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
1010
1011/**
1012 * acpi_dev_get_memory_resources - Get current memory resources of a device.
1013 * @adev: ACPI device node to get the resources for.
1014 * @list: Head of the resultant list of resources (must be empty).
1015 *
1016 * This is a helper function that locates all memory type resources of @adev
1017 * with acpi_dev_get_resources().
1018 *
1019 * The number of resources in the output list is returned on success, an error
1020 * code reflecting the error condition is returned otherwise.
1021 */
1022int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
1023{
1024 return acpi_dev_get_resources(adev, list, is_memory, NULL);
1025}
1026EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
1027
1028/**
1029 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
1030 * types
1031 * @ares: Input ACPI resource object.
1032 * @types: Valid resource types of IORESOURCE_XXX
1033 *
1034 * This is a helper function to support acpi_dev_get_resources(), which filters
1035 * ACPI resource objects according to resource types.
1036 */
1037int acpi_dev_filter_resource_type(struct acpi_resource *ares,
1038 unsigned long types)
1039{
1040 unsigned long type = 0;
1041
1042 switch (ares->type) {
1043 case ACPI_RESOURCE_TYPE_MEMORY24:
1044 case ACPI_RESOURCE_TYPE_MEMORY32:
1045 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
1046 type = IORESOURCE_MEM;
1047 break;
1048 case ACPI_RESOURCE_TYPE_IO:
1049 case ACPI_RESOURCE_TYPE_FIXED_IO:
1050 type = IORESOURCE_IO;
1051 break;
1052 case ACPI_RESOURCE_TYPE_IRQ:
1053 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
1054 type = IORESOURCE_IRQ;
1055 break;
1056 case ACPI_RESOURCE_TYPE_DMA:
1057 case ACPI_RESOURCE_TYPE_FIXED_DMA:
1058 type = IORESOURCE_DMA;
1059 break;
1060 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
1061 type = IORESOURCE_REG;
1062 break;
1063 case ACPI_RESOURCE_TYPE_ADDRESS16:
1064 case ACPI_RESOURCE_TYPE_ADDRESS32:
1065 case ACPI_RESOURCE_TYPE_ADDRESS64:
1066 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
1067 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
1068 type = IORESOURCE_MEM;
1069 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
1070 type = IORESOURCE_IO;
1071 else if (ares->data.address.resource_type ==
1072 ACPI_BUS_NUMBER_RANGE)
1073 type = IORESOURCE_BUS;
1074 break;
1075 default:
1076 break;
1077 }
1078
1079 return (type & types) ? 0 : 1;
1080}
1081EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
1082
1083static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
1084{
1085 struct list_head resource_list;
1086 struct resource_entry *rentry;
1087 int ret, found = 0;
1088
1089 INIT_LIST_HEAD(&resource_list);
1090 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
1091 if (ret < 0)
1092 return 0;
1093
1094 list_for_each_entry(rentry, &resource_list, node) {
1095 if (resource_contains(rentry->res, res)) {
1096 found = 1;
1097 break;
1098 }
1099
1100 }
1101
1102 acpi_dev_free_resource_list(&resource_list);
1103 return found;
1104}
1105
1106static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
1107 void *context, void **ret)
1108{
1109 struct resource *res = context;
1110 struct acpi_device **consumer = (struct acpi_device **) ret;
1111 struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
1112
1113 if (!adev)
1114 return AE_OK;
1115
1116 if (acpi_dev_consumes_res(adev, res)) {
1117 *consumer = adev;
1118 return AE_CTRL_TERMINATE;
1119 }
1120
1121 return AE_OK;
1122}
1123
1124/**
1125 * acpi_resource_consumer - Find the ACPI device that consumes @res.
1126 * @res: Resource to search for.
1127 *
1128 * Search the current resource settings (_CRS) of every ACPI device node
1129 * for @res. If we find an ACPI device whose _CRS includes @res, return
1130 * it. Otherwise, return NULL.
1131 */
1132struct acpi_device *acpi_resource_consumer(struct resource *res)
1133{
1134 struct acpi_device *consumer = NULL;
1135
1136 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);
1137 return consumer;
1138}
1/*
2 * drivers/acpi/resource.c - ACPI device resources interpretation.
3 *
4 * Copyright (C) 2012, Intel Corp.
5 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 */
24
25#include <linux/acpi.h>
26#include <linux/device.h>
27#include <linux/export.h>
28#include <linux/ioport.h>
29#include <linux/slab.h>
30
31#ifdef CONFIG_X86
32#define valid_IRQ(i) (((i) != 0) && ((i) != 2))
33#else
34#define valid_IRQ(i) (true)
35#endif
36
37static unsigned long acpi_dev_memresource_flags(u64 len, u8 write_protect,
38 bool window)
39{
40 unsigned long flags = IORESOURCE_MEM;
41
42 if (len == 0)
43 flags |= IORESOURCE_DISABLED;
44
45 if (write_protect == ACPI_READ_WRITE_MEMORY)
46 flags |= IORESOURCE_MEM_WRITEABLE;
47
48 if (window)
49 flags |= IORESOURCE_WINDOW;
50
51 return flags;
52}
53
54static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
55 u8 write_protect)
56{
57 res->start = start;
58 res->end = start + len - 1;
59 res->flags = acpi_dev_memresource_flags(len, write_protect, false);
60}
61
62/**
63 * acpi_dev_resource_memory - Extract ACPI memory resource information.
64 * @ares: Input ACPI resource object.
65 * @res: Output generic resource object.
66 *
67 * Check if the given ACPI resource object represents a memory resource and
68 * if that's the case, use the information in it to populate the generic
69 * resource object pointed to by @res.
70 */
71bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
72{
73 struct acpi_resource_memory24 *memory24;
74 struct acpi_resource_memory32 *memory32;
75 struct acpi_resource_fixed_memory32 *fixed_memory32;
76
77 switch (ares->type) {
78 case ACPI_RESOURCE_TYPE_MEMORY24:
79 memory24 = &ares->data.memory24;
80 if (!memory24->address_length)
81 return false;
82 acpi_dev_get_memresource(res, memory24->minimum,
83 memory24->address_length,
84 memory24->write_protect);
85 break;
86 case ACPI_RESOURCE_TYPE_MEMORY32:
87 memory32 = &ares->data.memory32;
88 if (!memory32->address_length)
89 return false;
90 acpi_dev_get_memresource(res, memory32->minimum,
91 memory32->address_length,
92 memory32->write_protect);
93 break;
94 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
95 fixed_memory32 = &ares->data.fixed_memory32;
96 if (!fixed_memory32->address_length)
97 return false;
98 acpi_dev_get_memresource(res, fixed_memory32->address,
99 fixed_memory32->address_length,
100 fixed_memory32->write_protect);
101 break;
102 default:
103 return false;
104 }
105 return true;
106}
107EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
108
109static unsigned int acpi_dev_ioresource_flags(u64 start, u64 end, u8 io_decode,
110 bool window)
111{
112 int flags = IORESOURCE_IO;
113
114 if (io_decode == ACPI_DECODE_16)
115 flags |= IORESOURCE_IO_16BIT_ADDR;
116
117 if (start > end || end >= 0x10003)
118 flags |= IORESOURCE_DISABLED;
119
120 if (window)
121 flags |= IORESOURCE_WINDOW;
122
123 return flags;
124}
125
126static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
127 u8 io_decode)
128{
129 u64 end = start + len - 1;
130
131 res->start = start;
132 res->end = end;
133 res->flags = acpi_dev_ioresource_flags(start, end, io_decode, false);
134}
135
136/**
137 * acpi_dev_resource_io - Extract ACPI I/O resource information.
138 * @ares: Input ACPI resource object.
139 * @res: Output generic resource object.
140 *
141 * Check if the given ACPI resource object represents an I/O resource and
142 * if that's the case, use the information in it to populate the generic
143 * resource object pointed to by @res.
144 */
145bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
146{
147 struct acpi_resource_io *io;
148 struct acpi_resource_fixed_io *fixed_io;
149
150 switch (ares->type) {
151 case ACPI_RESOURCE_TYPE_IO:
152 io = &ares->data.io;
153 if (!io->address_length)
154 return false;
155 acpi_dev_get_ioresource(res, io->minimum,
156 io->address_length,
157 io->io_decode);
158 break;
159 case ACPI_RESOURCE_TYPE_FIXED_IO:
160 fixed_io = &ares->data.fixed_io;
161 if (!fixed_io->address_length)
162 return false;
163 acpi_dev_get_ioresource(res, fixed_io->address,
164 fixed_io->address_length,
165 ACPI_DECODE_10);
166 break;
167 default:
168 return false;
169 }
170 return true;
171}
172EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
173
174/**
175 * acpi_dev_resource_address_space - Extract ACPI address space information.
176 * @ares: Input ACPI resource object.
177 * @res: Output generic resource object.
178 *
179 * Check if the given ACPI resource object represents an address space resource
180 * and if that's the case, use the information in it to populate the generic
181 * resource object pointed to by @res.
182 */
183bool acpi_dev_resource_address_space(struct acpi_resource *ares,
184 struct resource *res)
185{
186 acpi_status status;
187 struct acpi_resource_address64 addr;
188 bool window;
189 u64 len;
190 u8 io_decode;
191
192 switch (ares->type) {
193 case ACPI_RESOURCE_TYPE_ADDRESS16:
194 case ACPI_RESOURCE_TYPE_ADDRESS32:
195 case ACPI_RESOURCE_TYPE_ADDRESS64:
196 break;
197 default:
198 return false;
199 }
200
201 status = acpi_resource_to_address64(ares, &addr);
202 if (ACPI_FAILURE(status))
203 return true;
204
205 res->start = addr.minimum;
206 res->end = addr.maximum;
207 window = addr.producer_consumer == ACPI_PRODUCER;
208
209 switch(addr.resource_type) {
210 case ACPI_MEMORY_RANGE:
211 len = addr.maximum - addr.minimum + 1;
212 res->flags = acpi_dev_memresource_flags(len,
213 addr.info.mem.write_protect,
214 window);
215 break;
216 case ACPI_IO_RANGE:
217 io_decode = addr.granularity == 0xfff ?
218 ACPI_DECODE_10 : ACPI_DECODE_16;
219 res->flags = acpi_dev_ioresource_flags(addr.minimum,
220 addr.maximum,
221 io_decode, window);
222 break;
223 case ACPI_BUS_NUMBER_RANGE:
224 res->flags = IORESOURCE_BUS;
225 break;
226 default:
227 res->flags = 0;
228 }
229
230 return true;
231}
232EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
233
234/**
235 * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
236 * @ares: Input ACPI resource object.
237 * @res: Output generic resource object.
238 *
239 * Check if the given ACPI resource object represents an extended address space
240 * resource and if that's the case, use the information in it to populate the
241 * generic resource object pointed to by @res.
242 */
243bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
244 struct resource *res)
245{
246 struct acpi_resource_extended_address64 *ext_addr;
247 bool window;
248 u64 len;
249 u8 io_decode;
250
251 if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
252 return false;
253
254 ext_addr = &ares->data.ext_address64;
255
256 res->start = ext_addr->minimum;
257 res->end = ext_addr->maximum;
258 window = ext_addr->producer_consumer == ACPI_PRODUCER;
259
260 switch(ext_addr->resource_type) {
261 case ACPI_MEMORY_RANGE:
262 len = ext_addr->maximum - ext_addr->minimum + 1;
263 res->flags = acpi_dev_memresource_flags(len,
264 ext_addr->info.mem.write_protect,
265 window);
266 break;
267 case ACPI_IO_RANGE:
268 io_decode = ext_addr->granularity == 0xfff ?
269 ACPI_DECODE_10 : ACPI_DECODE_16;
270 res->flags = acpi_dev_ioresource_flags(ext_addr->minimum,
271 ext_addr->maximum,
272 io_decode, window);
273 break;
274 case ACPI_BUS_NUMBER_RANGE:
275 res->flags = IORESOURCE_BUS;
276 break;
277 default:
278 res->flags = 0;
279 }
280
281 return true;
282}
283EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
284
285/**
286 * acpi_dev_irq_flags - Determine IRQ resource flags.
287 * @triggering: Triggering type as provided by ACPI.
288 * @polarity: Interrupt polarity as provided by ACPI.
289 * @shareable: Whether or not the interrupt is shareable.
290 */
291unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
292{
293 unsigned long flags;
294
295 if (triggering == ACPI_LEVEL_SENSITIVE)
296 flags = polarity == ACPI_ACTIVE_LOW ?
297 IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
298 else
299 flags = polarity == ACPI_ACTIVE_LOW ?
300 IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
301
302 if (shareable == ACPI_SHARED)
303 flags |= IORESOURCE_IRQ_SHAREABLE;
304
305 return flags | IORESOURCE_IRQ;
306}
307EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
308
309static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
310{
311 res->start = gsi;
312 res->end = gsi;
313 res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED;
314}
315
316static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
317 u8 triggering, u8 polarity, u8 shareable,
318 bool legacy)
319{
320 int irq, p, t;
321
322 if (!valid_IRQ(gsi)) {
323 acpi_dev_irqresource_disabled(res, gsi);
324 return;
325 }
326
327 /*
328 * In IO-APIC mode, use overrided attribute. Two reasons:
329 * 1. BIOS bug in DSDT
330 * 2. BIOS uses IO-APIC mode Interrupt Source Override
331 *
332 * We do this only if we are dealing with IRQ() or IRQNoFlags()
333 * resource (the legacy ISA resources). With modern ACPI 5 devices
334 * using extended IRQ descriptors we take the IRQ configuration
335 * from _CRS directly.
336 */
337 if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
338 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
339 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
340
341 if (triggering != trig || polarity != pol) {
342 pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi,
343 t ? "level" : "edge", p ? "low" : "high");
344 triggering = trig;
345 polarity = pol;
346 }
347 }
348
349 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
350 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
351 if (irq >= 0) {
352 res->start = irq;
353 res->end = irq;
354 } else {
355 acpi_dev_irqresource_disabled(res, gsi);
356 }
357}
358
359/**
360 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
361 * @ares: Input ACPI resource object.
362 * @index: Index into the array of GSIs represented by the resource.
363 * @res: Output generic resource object.
364 *
365 * Check if the given ACPI resource object represents an interrupt resource
366 * and @index does not exceed the resource's interrupt count (true is returned
367 * in that case regardless of the results of the other checks)). If that's the
368 * case, register the GSI corresponding to @index from the array of interrupts
369 * represented by the resource and populate the generic resource object pointed
370 * to by @res accordingly. If the registration of the GSI is not successful,
371 * IORESOURCE_DISABLED will be set it that object's flags.
372 */
373bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
374 struct resource *res)
375{
376 struct acpi_resource_irq *irq;
377 struct acpi_resource_extended_irq *ext_irq;
378
379 switch (ares->type) {
380 case ACPI_RESOURCE_TYPE_IRQ:
381 /*
382 * Per spec, only one interrupt per descriptor is allowed in
383 * _CRS, but some firmware violates this, so parse them all.
384 */
385 irq = &ares->data.irq;
386 if (index >= irq->interrupt_count) {
387 acpi_dev_irqresource_disabled(res, 0);
388 return false;
389 }
390 acpi_dev_get_irqresource(res, irq->interrupts[index],
391 irq->triggering, irq->polarity,
392 irq->sharable, true);
393 break;
394 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
395 ext_irq = &ares->data.extended_irq;
396 if (index >= ext_irq->interrupt_count) {
397 acpi_dev_irqresource_disabled(res, 0);
398 return false;
399 }
400 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
401 ext_irq->triggering, ext_irq->polarity,
402 ext_irq->sharable, false);
403 break;
404 default:
405 return false;
406 }
407
408 return true;
409}
410EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
411
412/**
413 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
414 * @list: The head of the resource list to free.
415 */
416void acpi_dev_free_resource_list(struct list_head *list)
417{
418 struct resource_list_entry *rentry, *re;
419
420 list_for_each_entry_safe(rentry, re, list, node) {
421 list_del(&rentry->node);
422 kfree(rentry);
423 }
424}
425EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
426
427struct res_proc_context {
428 struct list_head *list;
429 int (*preproc)(struct acpi_resource *, void *);
430 void *preproc_data;
431 int count;
432 int error;
433};
434
435static acpi_status acpi_dev_new_resource_entry(struct resource *r,
436 struct res_proc_context *c)
437{
438 struct resource_list_entry *rentry;
439
440 rentry = kmalloc(sizeof(*rentry), GFP_KERNEL);
441 if (!rentry) {
442 c->error = -ENOMEM;
443 return AE_NO_MEMORY;
444 }
445 rentry->res = *r;
446 list_add_tail(&rentry->node, c->list);
447 c->count++;
448 return AE_OK;
449}
450
451static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
452 void *context)
453{
454 struct res_proc_context *c = context;
455 struct resource r;
456 int i;
457
458 if (c->preproc) {
459 int ret;
460
461 ret = c->preproc(ares, c->preproc_data);
462 if (ret < 0) {
463 c->error = ret;
464 return AE_CTRL_TERMINATE;
465 } else if (ret > 0) {
466 return AE_OK;
467 }
468 }
469
470 memset(&r, 0, sizeof(r));
471
472 if (acpi_dev_resource_memory(ares, &r)
473 || acpi_dev_resource_io(ares, &r)
474 || acpi_dev_resource_address_space(ares, &r)
475 || acpi_dev_resource_ext_address_space(ares, &r))
476 return acpi_dev_new_resource_entry(&r, c);
477
478 for (i = 0; acpi_dev_resource_interrupt(ares, i, &r); i++) {
479 acpi_status status;
480
481 status = acpi_dev_new_resource_entry(&r, c);
482 if (ACPI_FAILURE(status))
483 return status;
484 }
485
486 return AE_OK;
487}
488
489/**
490 * acpi_dev_get_resources - Get current resources of a device.
491 * @adev: ACPI device node to get the resources for.
492 * @list: Head of the resultant list of resources (must be empty).
493 * @preproc: The caller's preprocessing routine.
494 * @preproc_data: Pointer passed to the caller's preprocessing routine.
495 *
496 * Evaluate the _CRS method for the given device node and process its output by
497 * (1) executing the @preproc() rountine provided by the caller, passing the
498 * resource pointer and @preproc_data to it as arguments, for each ACPI resource
499 * returned and (2) converting all of the returned ACPI resources into struct
500 * resource objects if possible. If the return value of @preproc() in step (1)
501 * is different from 0, step (2) is not applied to the given ACPI resource and
502 * if that value is negative, the whole processing is aborted and that value is
503 * returned as the final error code.
504 *
505 * The resultant struct resource objects are put on the list pointed to by
506 * @list, that must be empty initially, as members of struct resource_list_entry
507 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
508 * free that list.
509 *
510 * The number of resources in the output list is returned on success, an error
511 * code reflecting the error condition is returned otherwise.
512 */
513int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
514 int (*preproc)(struct acpi_resource *, void *),
515 void *preproc_data)
516{
517 struct res_proc_context c;
518 acpi_status status;
519
520 if (!adev || !adev->handle || !list_empty(list))
521 return -EINVAL;
522
523 if (!acpi_has_method(adev->handle, METHOD_NAME__CRS))
524 return 0;
525
526 c.list = list;
527 c.preproc = preproc;
528 c.preproc_data = preproc_data;
529 c.count = 0;
530 c.error = 0;
531 status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
532 acpi_dev_process_resource, &c);
533 if (ACPI_FAILURE(status)) {
534 acpi_dev_free_resource_list(list);
535 return c.error ? c.error : -EIO;
536 }
537
538 return c.count;
539}
540EXPORT_SYMBOL_GPL(acpi_dev_get_resources);