Loading...
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 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 */
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 ExpertBook B1402CBA */
445 .matches = {
446 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
447 DMI_MATCH(DMI_BOARD_NAME, "B1402CBA"),
448 },
449 },
450 {
451 /* Asus ExpertBook B1402CVA */
452 .matches = {
453 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
454 DMI_MATCH(DMI_BOARD_NAME, "B1402CVA"),
455 },
456 },
457 {
458 /* Asus ExpertBook B1502CBA */
459 .matches = {
460 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
461 DMI_MATCH(DMI_BOARD_NAME, "B1502CBA"),
462 },
463 },
464 {
465 /* Asus ExpertBook B1502CGA */
466 .matches = {
467 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
468 DMI_MATCH(DMI_BOARD_NAME, "B1502CGA"),
469 },
470 },
471 {
472 /* Asus ExpertBook B2402CBA */
473 .matches = {
474 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
475 DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"),
476 },
477 },
478 {
479 /* Asus ExpertBook B2402FBA */
480 .matches = {
481 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
482 DMI_MATCH(DMI_BOARD_NAME, "B2402FBA"),
483 },
484 },
485 {
486 /* Asus ExpertBook B2502 */
487 .matches = {
488 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
489 DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"),
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 E1504GAB */
501 .matches = {
502 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
503 DMI_MATCH(DMI_BOARD_NAME, "E1504GAB"),
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};
515
516/*
517 * DMI matches for AMD Zen boards where the DSDT specifies the kbd IRQ
518 * as falling edge and this must be overridden to rising edge,
519 * to have a working keyboard.
520 */
521static const struct dmi_system_id irq1_edge_low_force_override[] = {
522 {
523 /* TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD */
524 .matches = {
525 DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
526 },
527 },
528 {
529 /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */
530 .matches = {
531 DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"),
532 },
533 },
534 {
535 /* TongFang GMxXGxx sold as Eluktronics Inc. RP-15 */
536 .matches = {
537 DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."),
538 DMI_MATCH(DMI_BOARD_NAME, "RP-15"),
539 },
540 },
541 {
542 /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */
543 .matches = {
544 DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"),
545 },
546 },
547 {
548 /* MAINGEAR Vector Pro 2 15 */
549 .matches = {
550 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
551 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"),
552 }
553 },
554 {
555 /* MAINGEAR Vector Pro 2 17 */
556 .matches = {
557 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
558 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"),
559 },
560 },
561 {
562 /* TongFang GM6BGEQ / PCSpecialist Elimina Pro 16 M, RTX 3050 */
563 .matches = {
564 DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"),
565 },
566 },
567 {
568 /* TongFang GM6BG5Q, RTX 4050 */
569 .matches = {
570 DMI_MATCH(DMI_BOARD_NAME, "GM6BG5Q"),
571 },
572 },
573 {
574 /* TongFang GM6BG0Q / PCSpecialist Elimina Pro 16 M, RTX 4060 */
575 .matches = {
576 DMI_MATCH(DMI_BOARD_NAME, "GM6BG0Q"),
577 },
578 },
579 {
580 /* Infinity E15-5A165-BM */
581 .matches = {
582 DMI_MATCH(DMI_BOARD_NAME, "GM5RG1E0009COM"),
583 },
584 },
585 {
586 /* Infinity E15-5A305-1M */
587 .matches = {
588 DMI_MATCH(DMI_BOARD_NAME, "GM5RGEE0016COM"),
589 },
590 },
591 { }
592};
593
594struct irq_override_cmp {
595 const struct dmi_system_id *system;
596 unsigned char irq;
597 unsigned char triggering;
598 unsigned char polarity;
599 unsigned char shareable;
600 bool override;
601};
602
603static const struct irq_override_cmp override_table[] = {
604 { irq1_level_low_skip_override, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
605 { irq1_edge_low_force_override, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
606};
607
608static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
609 u8 shareable)
610{
611 int i;
612
613 for (i = 0; i < ARRAY_SIZE(override_table); i++) {
614 const struct irq_override_cmp *entry = &override_table[i];
615
616 if (dmi_check_system(entry->system) &&
617 entry->irq == gsi &&
618 entry->triggering == triggering &&
619 entry->polarity == polarity &&
620 entry->shareable == shareable)
621 return entry->override;
622 }
623
624#ifdef CONFIG_X86
625 /*
626 * Always use the MADT override info, except for the i8042 PS/2 ctrl
627 * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes
628 * be used otherwise PS/2 keyboards / mice will not work.
629 */
630 if (gsi != 1 && gsi != 12)
631 return true;
632
633 /* If the override comes from an INT_SRC_OVR MADT entry, honor it. */
634 if (acpi_int_src_ovr[gsi])
635 return true;
636
637 /*
638 * IRQ override isn't needed on modern AMD Zen systems and
639 * this override breaks active low IRQs on AMD Ryzen 6000 and
640 * newer systems. Skip it.
641 */
642 if (boot_cpu_has(X86_FEATURE_ZEN))
643 return false;
644#endif
645
646 return true;
647}
648
649static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
650 u8 triggering, u8 polarity, u8 shareable,
651 u8 wake_capable, bool check_override)
652{
653 int irq, p, t;
654
655 if (!valid_IRQ(gsi)) {
656 irqresource_disabled(res, gsi);
657 return;
658 }
659
660 /*
661 * In IO-APIC mode, use overridden attribute. Two reasons:
662 * 1. BIOS bug in DSDT
663 * 2. BIOS uses IO-APIC mode Interrupt Source Override
664 *
665 * We do this only if we are dealing with IRQ() or IRQNoFlags()
666 * resource (the legacy ISA resources). With modern ACPI 5 devices
667 * using extended IRQ descriptors we take the IRQ configuration
668 * from _CRS directly.
669 */
670 if (check_override &&
671 acpi_dev_irq_override(gsi, triggering, polarity, shareable) &&
672 !acpi_get_override_irq(gsi, &t, &p)) {
673 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
674 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
675
676 if (triggering != trig || polarity != pol) {
677 pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi,
678 t ? "level" : "edge",
679 trig == triggering ? "" : "(!)",
680 p ? "low" : "high",
681 pol == polarity ? "" : "(!)");
682 triggering = trig;
683 polarity = pol;
684 }
685 }
686
687 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
688 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
689 if (irq >= 0) {
690 res->start = irq;
691 res->end = irq;
692 } else {
693 irqresource_disabled(res, gsi);
694 }
695}
696
697/**
698 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
699 * @ares: Input ACPI resource object.
700 * @index: Index into the array of GSIs represented by the resource.
701 * @res: Output generic resource object.
702 *
703 * Check if the given ACPI resource object represents an interrupt resource
704 * and @index does not exceed the resource's interrupt count (true is returned
705 * in that case regardless of the results of the other checks)). If that's the
706 * case, register the GSI corresponding to @index from the array of interrupts
707 * represented by the resource and populate the generic resource object pointed
708 * to by @res accordingly. If the registration of the GSI is not successful,
709 * IORESOURCE_DISABLED will be set it that object's flags.
710 *
711 * Return:
712 * 1) false with res->flags setting to zero: not the expected resource type
713 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
714 * 3) true: valid assigned resource
715 */
716bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
717 struct resource *res)
718{
719 struct acpi_resource_irq *irq;
720 struct acpi_resource_extended_irq *ext_irq;
721
722 switch (ares->type) {
723 case ACPI_RESOURCE_TYPE_IRQ:
724 /*
725 * Per spec, only one interrupt per descriptor is allowed in
726 * _CRS, but some firmware violates this, so parse them all.
727 */
728 irq = &ares->data.irq;
729 if (index >= irq->interrupt_count) {
730 irqresource_disabled(res, 0);
731 return false;
732 }
733 acpi_dev_get_irqresource(res, irq->interrupts[index],
734 irq->triggering, irq->polarity,
735 irq->shareable, irq->wake_capable,
736 true);
737 break;
738 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
739 ext_irq = &ares->data.extended_irq;
740 if (index >= ext_irq->interrupt_count) {
741 irqresource_disabled(res, 0);
742 return false;
743 }
744 if (is_gsi(ext_irq))
745 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
746 ext_irq->triggering, ext_irq->polarity,
747 ext_irq->shareable, ext_irq->wake_capable,
748 false);
749 else
750 irqresource_disabled(res, 0);
751 break;
752 default:
753 res->flags = 0;
754 return false;
755 }
756
757 return true;
758}
759EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
760
761/**
762 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
763 * @list: The head of the resource list to free.
764 */
765void acpi_dev_free_resource_list(struct list_head *list)
766{
767 resource_list_free(list);
768}
769EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
770
771struct res_proc_context {
772 struct list_head *list;
773 int (*preproc)(struct acpi_resource *, void *);
774 void *preproc_data;
775 int count;
776 int error;
777};
778
779static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
780 struct res_proc_context *c)
781{
782 struct resource_entry *rentry;
783
784 rentry = resource_list_create_entry(NULL, 0);
785 if (!rentry) {
786 c->error = -ENOMEM;
787 return AE_NO_MEMORY;
788 }
789 *rentry->res = win->res;
790 rentry->offset = win->offset;
791 resource_list_add_tail(rentry, c->list);
792 c->count++;
793 return AE_OK;
794}
795
796static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
797 void *context)
798{
799 struct res_proc_context *c = context;
800 struct resource_win win;
801 struct resource *res = &win.res;
802 int i;
803
804 if (c->preproc) {
805 int ret;
806
807 ret = c->preproc(ares, c->preproc_data);
808 if (ret < 0) {
809 c->error = ret;
810 return AE_ABORT_METHOD;
811 } else if (ret > 0) {
812 return AE_OK;
813 }
814 }
815
816 memset(&win, 0, sizeof(win));
817
818 if (acpi_dev_resource_memory(ares, res)
819 || acpi_dev_resource_io(ares, res)
820 || acpi_dev_resource_address_space(ares, &win)
821 || acpi_dev_resource_ext_address_space(ares, &win))
822 return acpi_dev_new_resource_entry(&win, c);
823
824 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
825 acpi_status status;
826
827 status = acpi_dev_new_resource_entry(&win, c);
828 if (ACPI_FAILURE(status))
829 return status;
830 }
831
832 return AE_OK;
833}
834
835static int __acpi_dev_get_resources(struct acpi_device *adev,
836 struct list_head *list,
837 int (*preproc)(struct acpi_resource *, void *),
838 void *preproc_data, char *method)
839{
840 struct res_proc_context c;
841 acpi_status status;
842
843 if (!adev || !adev->handle || !list_empty(list))
844 return -EINVAL;
845
846 if (!acpi_has_method(adev->handle, method))
847 return 0;
848
849 c.list = list;
850 c.preproc = preproc;
851 c.preproc_data = preproc_data;
852 c.count = 0;
853 c.error = 0;
854 status = acpi_walk_resources(adev->handle, method,
855 acpi_dev_process_resource, &c);
856 if (ACPI_FAILURE(status)) {
857 acpi_dev_free_resource_list(list);
858 return c.error ? c.error : -EIO;
859 }
860
861 return c.count;
862}
863
864/**
865 * acpi_dev_get_resources - Get current resources of a device.
866 * @adev: ACPI device node to get the resources for.
867 * @list: Head of the resultant list of resources (must be empty).
868 * @preproc: The caller's preprocessing routine.
869 * @preproc_data: Pointer passed to the caller's preprocessing routine.
870 *
871 * Evaluate the _CRS method for the given device node and process its output by
872 * (1) executing the @preproc() routine provided by the caller, passing the
873 * resource pointer and @preproc_data to it as arguments, for each ACPI resource
874 * returned and (2) converting all of the returned ACPI resources into struct
875 * resource objects if possible. If the return value of @preproc() in step (1)
876 * is different from 0, step (2) is not applied to the given ACPI resource and
877 * if that value is negative, the whole processing is aborted and that value is
878 * returned as the final error code.
879 *
880 * The resultant struct resource objects are put on the list pointed to by
881 * @list, that must be empty initially, as members of struct resource_entry
882 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
883 * free that list.
884 *
885 * The number of resources in the output list is returned on success, an error
886 * code reflecting the error condition is returned otherwise.
887 */
888int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
889 int (*preproc)(struct acpi_resource *, void *),
890 void *preproc_data)
891{
892 return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
893 METHOD_NAME__CRS);
894}
895EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
896
897static int is_memory(struct acpi_resource *ares, void *not_used)
898{
899 struct resource_win win;
900 struct resource *res = &win.res;
901
902 memset(&win, 0, sizeof(win));
903
904 if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM))
905 return 1;
906
907 return !(acpi_dev_resource_memory(ares, res)
908 || acpi_dev_resource_address_space(ares, &win)
909 || acpi_dev_resource_ext_address_space(ares, &win));
910}
911
912/**
913 * acpi_dev_get_dma_resources - Get current DMA resources of a device.
914 * @adev: ACPI device node to get the resources for.
915 * @list: Head of the resultant list of resources (must be empty).
916 *
917 * Evaluate the _DMA method for the given device node and process its
918 * output.
919 *
920 * The resultant struct resource objects are put on the list pointed to
921 * by @list, that must be empty initially, as members of struct
922 * resource_entry objects. Callers of this routine should use
923 * %acpi_dev_free_resource_list() to free that list.
924 *
925 * The number of resources in the output list is returned on success,
926 * an error code reflecting the error condition is returned otherwise.
927 */
928int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
929{
930 return __acpi_dev_get_resources(adev, list, is_memory, NULL,
931 METHOD_NAME__DMA);
932}
933EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
934
935/**
936 * acpi_dev_get_memory_resources - Get current memory resources of a device.
937 * @adev: ACPI device node to get the resources for.
938 * @list: Head of the resultant list of resources (must be empty).
939 *
940 * This is a helper function that locates all memory type resources of @adev
941 * with acpi_dev_get_resources().
942 *
943 * The number of resources in the output list is returned on success, an error
944 * code reflecting the error condition is returned otherwise.
945 */
946int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
947{
948 return acpi_dev_get_resources(adev, list, is_memory, NULL);
949}
950EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
951
952/**
953 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
954 * types
955 * @ares: Input ACPI resource object.
956 * @types: Valid resource types of IORESOURCE_XXX
957 *
958 * This is a helper function to support acpi_dev_get_resources(), which filters
959 * ACPI resource objects according to resource types.
960 */
961int acpi_dev_filter_resource_type(struct acpi_resource *ares,
962 unsigned long types)
963{
964 unsigned long type = 0;
965
966 switch (ares->type) {
967 case ACPI_RESOURCE_TYPE_MEMORY24:
968 case ACPI_RESOURCE_TYPE_MEMORY32:
969 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
970 type = IORESOURCE_MEM;
971 break;
972 case ACPI_RESOURCE_TYPE_IO:
973 case ACPI_RESOURCE_TYPE_FIXED_IO:
974 type = IORESOURCE_IO;
975 break;
976 case ACPI_RESOURCE_TYPE_IRQ:
977 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
978 type = IORESOURCE_IRQ;
979 break;
980 case ACPI_RESOURCE_TYPE_DMA:
981 case ACPI_RESOURCE_TYPE_FIXED_DMA:
982 type = IORESOURCE_DMA;
983 break;
984 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
985 type = IORESOURCE_REG;
986 break;
987 case ACPI_RESOURCE_TYPE_ADDRESS16:
988 case ACPI_RESOURCE_TYPE_ADDRESS32:
989 case ACPI_RESOURCE_TYPE_ADDRESS64:
990 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
991 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
992 type = IORESOURCE_MEM;
993 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
994 type = IORESOURCE_IO;
995 else if (ares->data.address.resource_type ==
996 ACPI_BUS_NUMBER_RANGE)
997 type = IORESOURCE_BUS;
998 break;
999 default:
1000 break;
1001 }
1002
1003 return (type & types) ? 0 : 1;
1004}
1005EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
1006
1007static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
1008{
1009 struct list_head resource_list;
1010 struct resource_entry *rentry;
1011 int ret, found = 0;
1012
1013 INIT_LIST_HEAD(&resource_list);
1014 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
1015 if (ret < 0)
1016 return 0;
1017
1018 list_for_each_entry(rentry, &resource_list, node) {
1019 if (resource_contains(rentry->res, res)) {
1020 found = 1;
1021 break;
1022 }
1023
1024 }
1025
1026 acpi_dev_free_resource_list(&resource_list);
1027 return found;
1028}
1029
1030static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
1031 void *context, void **ret)
1032{
1033 struct resource *res = context;
1034 struct acpi_device **consumer = (struct acpi_device **) ret;
1035 struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
1036
1037 if (!adev)
1038 return AE_OK;
1039
1040 if (acpi_dev_consumes_res(adev, res)) {
1041 *consumer = adev;
1042 return AE_CTRL_TERMINATE;
1043 }
1044
1045 return AE_OK;
1046}
1047
1048/**
1049 * acpi_resource_consumer - Find the ACPI device that consumes @res.
1050 * @res: Resource to search for.
1051 *
1052 * Search the current resource settings (_CRS) of every ACPI device node
1053 * for @res. If we find an ACPI device whose _CRS includes @res, return
1054 * it. Otherwise, return NULL.
1055 */
1056struct acpi_device *acpi_resource_consumer(struct resource *res)
1057{
1058 struct acpi_device *consumer = NULL;
1059
1060 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);
1061 return consumer;
1062}
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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 */
20
21#include <linux/acpi.h>
22#include <linux/device.h>
23#include <linux/export.h>
24#include <linux/ioport.h>
25#include <linux/slab.h>
26#include <linux/irq.h>
27
28#ifdef CONFIG_X86
29#define valid_IRQ(i) (((i) != 0) && ((i) != 2))
30static inline bool acpi_iospace_resource_valid(struct resource *res)
31{
32 /* On X86 IO space is limited to the [0 - 64K] IO port range */
33 return res->end < 0x10003;
34}
35#else
36#define valid_IRQ(i) (true)
37/*
38 * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical
39 * addresses mapping IO space in CPU physical address space, IO space
40 * resources can be placed anywhere in the 64-bit physical address space.
41 */
42static inline bool
43acpi_iospace_resource_valid(struct resource *res) { return true; }
44#endif
45
46static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
47{
48 u64 reslen = end - start + 1;
49
50 /*
51 * CHECKME: len might be required to check versus a minimum
52 * length as well. 1 for io is fine, but for memory it does
53 * not make any sense at all.
54 * Note: some BIOSes report incorrect length for ACPI address space
55 * descriptor, so remove check of 'reslen == len' to avoid regression.
56 */
57 if (len && reslen && start <= end)
58 return true;
59
60 pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
61 io ? "io" : "mem", start, end, len);
62
63 return false;
64}
65
66static void acpi_dev_memresource_flags(struct resource *res, u64 len,
67 u8 write_protect)
68{
69 res->flags = IORESOURCE_MEM;
70
71 if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
72 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
73
74 if (write_protect == ACPI_READ_WRITE_MEMORY)
75 res->flags |= IORESOURCE_MEM_WRITEABLE;
76}
77
78static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
79 u8 write_protect)
80{
81 res->start = start;
82 res->end = start + len - 1;
83 acpi_dev_memresource_flags(res, len, write_protect);
84}
85
86/**
87 * acpi_dev_resource_memory - Extract ACPI memory resource information.
88 * @ares: Input ACPI resource object.
89 * @res: Output generic resource object.
90 *
91 * Check if the given ACPI resource object represents a memory resource and
92 * if that's the case, use the information in it to populate the generic
93 * resource object pointed to by @res.
94 *
95 * Return:
96 * 1) false with res->flags setting to zero: not the expected resource type
97 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
98 * 3) true: valid assigned resource
99 */
100bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
101{
102 struct acpi_resource_memory24 *memory24;
103 struct acpi_resource_memory32 *memory32;
104 struct acpi_resource_fixed_memory32 *fixed_memory32;
105
106 switch (ares->type) {
107 case ACPI_RESOURCE_TYPE_MEMORY24:
108 memory24 = &ares->data.memory24;
109 acpi_dev_get_memresource(res, memory24->minimum << 8,
110 memory24->address_length << 8,
111 memory24->write_protect);
112 break;
113 case ACPI_RESOURCE_TYPE_MEMORY32:
114 memory32 = &ares->data.memory32;
115 acpi_dev_get_memresource(res, memory32->minimum,
116 memory32->address_length,
117 memory32->write_protect);
118 break;
119 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
120 fixed_memory32 = &ares->data.fixed_memory32;
121 acpi_dev_get_memresource(res, fixed_memory32->address,
122 fixed_memory32->address_length,
123 fixed_memory32->write_protect);
124 break;
125 default:
126 res->flags = 0;
127 return false;
128 }
129
130 return !(res->flags & IORESOURCE_DISABLED);
131}
132EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
133
134static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
135 u8 io_decode, u8 translation_type)
136{
137 res->flags = IORESOURCE_IO;
138
139 if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
140 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
141
142 if (!acpi_iospace_resource_valid(res))
143 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
144
145 if (io_decode == ACPI_DECODE_16)
146 res->flags |= IORESOURCE_IO_16BIT_ADDR;
147 if (translation_type == ACPI_SPARSE_TRANSLATION)
148 res->flags |= IORESOURCE_IO_SPARSE;
149}
150
151static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
152 u8 io_decode)
153{
154 res->start = start;
155 res->end = start + len - 1;
156 acpi_dev_ioresource_flags(res, len, io_decode, 0);
157}
158
159/**
160 * acpi_dev_resource_io - Extract ACPI I/O resource information.
161 * @ares: Input ACPI resource object.
162 * @res: Output generic resource object.
163 *
164 * Check if the given ACPI resource object represents an I/O resource and
165 * if that's the case, use the information in it to populate the generic
166 * resource object pointed to by @res.
167 *
168 * Return:
169 * 1) false with res->flags setting to zero: not the expected resource type
170 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
171 * 3) true: valid assigned resource
172 */
173bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
174{
175 struct acpi_resource_io *io;
176 struct acpi_resource_fixed_io *fixed_io;
177
178 switch (ares->type) {
179 case ACPI_RESOURCE_TYPE_IO:
180 io = &ares->data.io;
181 acpi_dev_get_ioresource(res, io->minimum,
182 io->address_length,
183 io->io_decode);
184 break;
185 case ACPI_RESOURCE_TYPE_FIXED_IO:
186 fixed_io = &ares->data.fixed_io;
187 acpi_dev_get_ioresource(res, fixed_io->address,
188 fixed_io->address_length,
189 ACPI_DECODE_10);
190 break;
191 default:
192 res->flags = 0;
193 return false;
194 }
195
196 return !(res->flags & IORESOURCE_DISABLED);
197}
198EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
199
200static bool acpi_decode_space(struct resource_win *win,
201 struct acpi_resource_address *addr,
202 struct acpi_address64_attribute *attr)
203{
204 u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
205 bool wp = addr->info.mem.write_protect;
206 u64 len = attr->address_length;
207 u64 start, end, offset = 0;
208 struct resource *res = &win->res;
209
210 /*
211 * Filter out invalid descriptor according to ACPI Spec 5.0, section
212 * 6.4.3.5 Address Space Resource Descriptors.
213 */
214 if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
215 (addr->min_address_fixed && addr->max_address_fixed && !len))
216 pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
217 addr->min_address_fixed, addr->max_address_fixed, len);
218
219 /*
220 * For bridges that translate addresses across the bridge,
221 * translation_offset is the offset that must be added to the
222 * address on the secondary side to obtain the address on the
223 * primary side. Non-bridge devices must list 0 for all Address
224 * Translation offset bits.
225 */
226 if (addr->producer_consumer == ACPI_PRODUCER)
227 offset = attr->translation_offset;
228 else if (attr->translation_offset)
229 pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
230 attr->translation_offset);
231 start = attr->minimum + offset;
232 end = attr->maximum + offset;
233
234 win->offset = offset;
235 res->start = start;
236 res->end = end;
237 if (sizeof(resource_size_t) < sizeof(u64) &&
238 (offset != win->offset || start != res->start || end != res->end)) {
239 pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
240 attr->minimum, attr->maximum);
241 return false;
242 }
243
244 switch (addr->resource_type) {
245 case ACPI_MEMORY_RANGE:
246 acpi_dev_memresource_flags(res, len, wp);
247 break;
248 case ACPI_IO_RANGE:
249 acpi_dev_ioresource_flags(res, len, iodec,
250 addr->info.io.translation_type);
251 break;
252 case ACPI_BUS_NUMBER_RANGE:
253 res->flags = IORESOURCE_BUS;
254 break;
255 default:
256 return false;
257 }
258
259 if (addr->producer_consumer == ACPI_PRODUCER)
260 res->flags |= IORESOURCE_WINDOW;
261
262 if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
263 res->flags |= IORESOURCE_PREFETCH;
264
265 return !(res->flags & IORESOURCE_DISABLED);
266}
267
268/**
269 * acpi_dev_resource_address_space - Extract ACPI address space information.
270 * @ares: Input ACPI resource object.
271 * @win: Output generic resource object.
272 *
273 * Check if the given ACPI resource object represents an address space resource
274 * and if that's the case, use the information in it to populate the generic
275 * resource object pointed to by @win.
276 *
277 * Return:
278 * 1) false with win->res.flags setting to zero: not the expected resource type
279 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
280 * resource
281 * 3) true: valid assigned resource
282 */
283bool acpi_dev_resource_address_space(struct acpi_resource *ares,
284 struct resource_win *win)
285{
286 struct acpi_resource_address64 addr;
287
288 win->res.flags = 0;
289 if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
290 return false;
291
292 return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
293 &addr.address);
294}
295EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
296
297/**
298 * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
299 * @ares: Input ACPI resource object.
300 * @win: Output generic resource object.
301 *
302 * Check if the given ACPI resource object represents an extended address space
303 * resource and if that's the case, use the information in it to populate the
304 * generic resource object pointed to by @win.
305 *
306 * Return:
307 * 1) false with win->res.flags setting to zero: not the expected resource type
308 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
309 * resource
310 * 3) true: valid assigned resource
311 */
312bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
313 struct resource_win *win)
314{
315 struct acpi_resource_extended_address64 *ext_addr;
316
317 win->res.flags = 0;
318 if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
319 return false;
320
321 ext_addr = &ares->data.ext_address64;
322
323 return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
324 &ext_addr->address);
325}
326EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
327
328/**
329 * acpi_dev_irq_flags - Determine IRQ resource flags.
330 * @triggering: Triggering type as provided by ACPI.
331 * @polarity: Interrupt polarity as provided by ACPI.
332 * @shareable: Whether or not the interrupt is shareable.
333 */
334unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
335{
336 unsigned long flags;
337
338 if (triggering == ACPI_LEVEL_SENSITIVE)
339 flags = polarity == ACPI_ACTIVE_LOW ?
340 IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
341 else
342 flags = polarity == ACPI_ACTIVE_LOW ?
343 IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
344
345 if (shareable == ACPI_SHARED)
346 flags |= IORESOURCE_IRQ_SHAREABLE;
347
348 return flags | IORESOURCE_IRQ;
349}
350EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
351
352/**
353 * acpi_dev_get_irq_type - Determine irq type.
354 * @triggering: Triggering type as provided by ACPI.
355 * @polarity: Interrupt polarity as provided by ACPI.
356 */
357unsigned int acpi_dev_get_irq_type(int triggering, int polarity)
358{
359 switch (polarity) {
360 case ACPI_ACTIVE_LOW:
361 return triggering == ACPI_EDGE_SENSITIVE ?
362 IRQ_TYPE_EDGE_FALLING :
363 IRQ_TYPE_LEVEL_LOW;
364 case ACPI_ACTIVE_HIGH:
365 return triggering == ACPI_EDGE_SENSITIVE ?
366 IRQ_TYPE_EDGE_RISING :
367 IRQ_TYPE_LEVEL_HIGH;
368 case ACPI_ACTIVE_BOTH:
369 if (triggering == ACPI_EDGE_SENSITIVE)
370 return IRQ_TYPE_EDGE_BOTH;
371 default:
372 return IRQ_TYPE_NONE;
373 }
374}
375EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
376
377static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
378{
379 res->start = gsi;
380 res->end = gsi;
381 res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
382}
383
384static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
385 u8 triggering, u8 polarity, u8 shareable,
386 bool legacy)
387{
388 int irq, p, t;
389
390 if (!valid_IRQ(gsi)) {
391 acpi_dev_irqresource_disabled(res, gsi);
392 return;
393 }
394
395 /*
396 * In IO-APIC mode, use overrided attribute. Two reasons:
397 * 1. BIOS bug in DSDT
398 * 2. BIOS uses IO-APIC mode Interrupt Source Override
399 *
400 * We do this only if we are dealing with IRQ() or IRQNoFlags()
401 * resource (the legacy ISA resources). With modern ACPI 5 devices
402 * using extended IRQ descriptors we take the IRQ configuration
403 * from _CRS directly.
404 */
405 if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
406 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
407 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
408
409 if (triggering != trig || polarity != pol) {
410 pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi,
411 t ? "level" : "edge", p ? "low" : "high");
412 triggering = trig;
413 polarity = pol;
414 }
415 }
416
417 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
418 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
419 if (irq >= 0) {
420 res->start = irq;
421 res->end = irq;
422 } else {
423 acpi_dev_irqresource_disabled(res, gsi);
424 }
425}
426
427/**
428 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
429 * @ares: Input ACPI resource object.
430 * @index: Index into the array of GSIs represented by the resource.
431 * @res: Output generic resource object.
432 *
433 * Check if the given ACPI resource object represents an interrupt resource
434 * and @index does not exceed the resource's interrupt count (true is returned
435 * in that case regardless of the results of the other checks)). If that's the
436 * case, register the GSI corresponding to @index from the array of interrupts
437 * represented by the resource and populate the generic resource object pointed
438 * to by @res accordingly. If the registration of the GSI is not successful,
439 * IORESOURCE_DISABLED will be set it that object's flags.
440 *
441 * Return:
442 * 1) false with res->flags setting to zero: not the expected resource type
443 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
444 * 3) true: valid assigned resource
445 */
446bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
447 struct resource *res)
448{
449 struct acpi_resource_irq *irq;
450 struct acpi_resource_extended_irq *ext_irq;
451
452 switch (ares->type) {
453 case ACPI_RESOURCE_TYPE_IRQ:
454 /*
455 * Per spec, only one interrupt per descriptor is allowed in
456 * _CRS, but some firmware violates this, so parse them all.
457 */
458 irq = &ares->data.irq;
459 if (index >= irq->interrupt_count) {
460 acpi_dev_irqresource_disabled(res, 0);
461 return false;
462 }
463 acpi_dev_get_irqresource(res, irq->interrupts[index],
464 irq->triggering, irq->polarity,
465 irq->sharable, true);
466 break;
467 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
468 ext_irq = &ares->data.extended_irq;
469 if (index >= ext_irq->interrupt_count) {
470 acpi_dev_irqresource_disabled(res, 0);
471 return false;
472 }
473 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
474 ext_irq->triggering, ext_irq->polarity,
475 ext_irq->sharable, false);
476 break;
477 default:
478 res->flags = 0;
479 return false;
480 }
481
482 return true;
483}
484EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
485
486/**
487 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
488 * @list: The head of the resource list to free.
489 */
490void acpi_dev_free_resource_list(struct list_head *list)
491{
492 resource_list_free(list);
493}
494EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
495
496struct res_proc_context {
497 struct list_head *list;
498 int (*preproc)(struct acpi_resource *, void *);
499 void *preproc_data;
500 int count;
501 int error;
502};
503
504static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
505 struct res_proc_context *c)
506{
507 struct resource_entry *rentry;
508
509 rentry = resource_list_create_entry(NULL, 0);
510 if (!rentry) {
511 c->error = -ENOMEM;
512 return AE_NO_MEMORY;
513 }
514 *rentry->res = win->res;
515 rentry->offset = win->offset;
516 resource_list_add_tail(rentry, c->list);
517 c->count++;
518 return AE_OK;
519}
520
521static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
522 void *context)
523{
524 struct res_proc_context *c = context;
525 struct resource_win win;
526 struct resource *res = &win.res;
527 int i;
528
529 if (c->preproc) {
530 int ret;
531
532 ret = c->preproc(ares, c->preproc_data);
533 if (ret < 0) {
534 c->error = ret;
535 return AE_CTRL_TERMINATE;
536 } else if (ret > 0) {
537 return AE_OK;
538 }
539 }
540
541 memset(&win, 0, sizeof(win));
542
543 if (acpi_dev_resource_memory(ares, res)
544 || acpi_dev_resource_io(ares, res)
545 || acpi_dev_resource_address_space(ares, &win)
546 || acpi_dev_resource_ext_address_space(ares, &win))
547 return acpi_dev_new_resource_entry(&win, c);
548
549 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
550 acpi_status status;
551
552 status = acpi_dev_new_resource_entry(&win, c);
553 if (ACPI_FAILURE(status))
554 return status;
555 }
556
557 return AE_OK;
558}
559
560/**
561 * acpi_dev_get_resources - Get current resources of a device.
562 * @adev: ACPI device node to get the resources for.
563 * @list: Head of the resultant list of resources (must be empty).
564 * @preproc: The caller's preprocessing routine.
565 * @preproc_data: Pointer passed to the caller's preprocessing routine.
566 *
567 * Evaluate the _CRS method for the given device node and process its output by
568 * (1) executing the @preproc() rountine provided by the caller, passing the
569 * resource pointer and @preproc_data to it as arguments, for each ACPI resource
570 * returned and (2) converting all of the returned ACPI resources into struct
571 * resource objects if possible. If the return value of @preproc() in step (1)
572 * is different from 0, step (2) is not applied to the given ACPI resource and
573 * if that value is negative, the whole processing is aborted and that value is
574 * returned as the final error code.
575 *
576 * The resultant struct resource objects are put on the list pointed to by
577 * @list, that must be empty initially, as members of struct resource_entry
578 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
579 * free that list.
580 *
581 * The number of resources in the output list is returned on success, an error
582 * code reflecting the error condition is returned otherwise.
583 */
584int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
585 int (*preproc)(struct acpi_resource *, void *),
586 void *preproc_data)
587{
588 struct res_proc_context c;
589 acpi_status status;
590
591 if (!adev || !adev->handle || !list_empty(list))
592 return -EINVAL;
593
594 if (!acpi_has_method(adev->handle, METHOD_NAME__CRS))
595 return 0;
596
597 c.list = list;
598 c.preproc = preproc;
599 c.preproc_data = preproc_data;
600 c.count = 0;
601 c.error = 0;
602 status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
603 acpi_dev_process_resource, &c);
604 if (ACPI_FAILURE(status)) {
605 acpi_dev_free_resource_list(list);
606 return c.error ? c.error : -EIO;
607 }
608
609 return c.count;
610}
611EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
612
613/**
614 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
615 * types
616 * @ares: Input ACPI resource object.
617 * @types: Valid resource types of IORESOURCE_XXX
618 *
619 * This is a helper function to support acpi_dev_get_resources(), which filters
620 * ACPI resource objects according to resource types.
621 */
622int acpi_dev_filter_resource_type(struct acpi_resource *ares,
623 unsigned long types)
624{
625 unsigned long type = 0;
626
627 switch (ares->type) {
628 case ACPI_RESOURCE_TYPE_MEMORY24:
629 case ACPI_RESOURCE_TYPE_MEMORY32:
630 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
631 type = IORESOURCE_MEM;
632 break;
633 case ACPI_RESOURCE_TYPE_IO:
634 case ACPI_RESOURCE_TYPE_FIXED_IO:
635 type = IORESOURCE_IO;
636 break;
637 case ACPI_RESOURCE_TYPE_IRQ:
638 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
639 type = IORESOURCE_IRQ;
640 break;
641 case ACPI_RESOURCE_TYPE_DMA:
642 case ACPI_RESOURCE_TYPE_FIXED_DMA:
643 type = IORESOURCE_DMA;
644 break;
645 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
646 type = IORESOURCE_REG;
647 break;
648 case ACPI_RESOURCE_TYPE_ADDRESS16:
649 case ACPI_RESOURCE_TYPE_ADDRESS32:
650 case ACPI_RESOURCE_TYPE_ADDRESS64:
651 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
652 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
653 type = IORESOURCE_MEM;
654 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
655 type = IORESOURCE_IO;
656 else if (ares->data.address.resource_type ==
657 ACPI_BUS_NUMBER_RANGE)
658 type = IORESOURCE_BUS;
659 break;
660 default:
661 break;
662 }
663
664 return (type & types) ? 0 : 1;
665}
666EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);