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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
20#ifdef CONFIG_X86
21#define valid_IRQ(i) (((i) != 0) && ((i) != 2))
22static inline bool acpi_iospace_resource_valid(struct resource *res)
23{
24 /* On X86 IO space is limited to the [0 - 64K] IO port range */
25 return res->end < 0x10003;
26}
27#else
28#define valid_IRQ(i) (true)
29/*
30 * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical
31 * addresses mapping IO space in CPU physical address space, IO space
32 * resources can be placed anywhere in the 64-bit physical address space.
33 */
34static inline bool
35acpi_iospace_resource_valid(struct resource *res) { return true; }
36#endif
37
38#if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI)
39static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
40{
41 return ext_irq->resource_source.string_length == 0 &&
42 ext_irq->producer_consumer == ACPI_CONSUMER;
43}
44#else
45static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
46{
47 return true;
48}
49#endif
50
51static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
52{
53 u64 reslen = end - start + 1;
54
55 /*
56 * CHECKME: len might be required to check versus a minimum
57 * length as well. 1 for io is fine, but for memory it does
58 * not make any sense at all.
59 * Note: some BIOSes report incorrect length for ACPI address space
60 * descriptor, so remove check of 'reslen == len' to avoid regression.
61 */
62 if (len && reslen && start <= end)
63 return true;
64
65 pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
66 io ? "io" : "mem", start, end, len);
67
68 return false;
69}
70
71static void acpi_dev_memresource_flags(struct resource *res, u64 len,
72 u8 write_protect)
73{
74 res->flags = IORESOURCE_MEM;
75
76 if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
77 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
78
79 if (write_protect == ACPI_READ_WRITE_MEMORY)
80 res->flags |= IORESOURCE_MEM_WRITEABLE;
81}
82
83static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
84 u8 write_protect)
85{
86 res->start = start;
87 res->end = start + len - 1;
88 acpi_dev_memresource_flags(res, len, write_protect);
89}
90
91/**
92 * acpi_dev_resource_memory - Extract ACPI memory resource information.
93 * @ares: Input ACPI resource object.
94 * @res: Output generic resource object.
95 *
96 * Check if the given ACPI resource object represents a memory resource and
97 * if that's the case, use the information in it to populate the generic
98 * resource object pointed to by @res.
99 *
100 * Return:
101 * 1) false with res->flags setting to zero: not the expected resource type
102 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
103 * 3) true: valid assigned resource
104 */
105bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
106{
107 struct acpi_resource_memory24 *memory24;
108 struct acpi_resource_memory32 *memory32;
109 struct acpi_resource_fixed_memory32 *fixed_memory32;
110
111 switch (ares->type) {
112 case ACPI_RESOURCE_TYPE_MEMORY24:
113 memory24 = &ares->data.memory24;
114 acpi_dev_get_memresource(res, memory24->minimum << 8,
115 memory24->address_length << 8,
116 memory24->write_protect);
117 break;
118 case ACPI_RESOURCE_TYPE_MEMORY32:
119 memory32 = &ares->data.memory32;
120 acpi_dev_get_memresource(res, memory32->minimum,
121 memory32->address_length,
122 memory32->write_protect);
123 break;
124 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
125 fixed_memory32 = &ares->data.fixed_memory32;
126 acpi_dev_get_memresource(res, fixed_memory32->address,
127 fixed_memory32->address_length,
128 fixed_memory32->write_protect);
129 break;
130 default:
131 res->flags = 0;
132 return false;
133 }
134
135 return !(res->flags & IORESOURCE_DISABLED);
136}
137EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
138
139static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
140 u8 io_decode, u8 translation_type)
141{
142 res->flags = IORESOURCE_IO;
143
144 if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
145 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
146
147 if (!acpi_iospace_resource_valid(res))
148 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
149
150 if (io_decode == ACPI_DECODE_16)
151 res->flags |= IORESOURCE_IO_16BIT_ADDR;
152 if (translation_type == ACPI_SPARSE_TRANSLATION)
153 res->flags |= IORESOURCE_IO_SPARSE;
154}
155
156static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
157 u8 io_decode)
158{
159 res->start = start;
160 res->end = start + len - 1;
161 acpi_dev_ioresource_flags(res, len, io_decode, 0);
162}
163
164/**
165 * acpi_dev_resource_io - Extract ACPI I/O resource information.
166 * @ares: Input ACPI resource object.
167 * @res: Output generic resource object.
168 *
169 * Check if the given ACPI resource object represents an I/O resource and
170 * if that's the case, use the information in it to populate the generic
171 * resource object pointed to by @res.
172 *
173 * Return:
174 * 1) false with res->flags setting to zero: not the expected resource type
175 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
176 * 3) true: valid assigned resource
177 */
178bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
179{
180 struct acpi_resource_io *io;
181 struct acpi_resource_fixed_io *fixed_io;
182
183 switch (ares->type) {
184 case ACPI_RESOURCE_TYPE_IO:
185 io = &ares->data.io;
186 acpi_dev_get_ioresource(res, io->minimum,
187 io->address_length,
188 io->io_decode);
189 break;
190 case ACPI_RESOURCE_TYPE_FIXED_IO:
191 fixed_io = &ares->data.fixed_io;
192 acpi_dev_get_ioresource(res, fixed_io->address,
193 fixed_io->address_length,
194 ACPI_DECODE_10);
195 break;
196 default:
197 res->flags = 0;
198 return false;
199 }
200
201 return !(res->flags & IORESOURCE_DISABLED);
202}
203EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
204
205static bool acpi_decode_space(struct resource_win *win,
206 struct acpi_resource_address *addr,
207 struct acpi_address64_attribute *attr)
208{
209 u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
210 bool wp = addr->info.mem.write_protect;
211 u64 len = attr->address_length;
212 u64 start, end, offset = 0;
213 struct resource *res = &win->res;
214
215 /*
216 * Filter out invalid descriptor according to ACPI Spec 5.0, section
217 * 6.4.3.5 Address Space Resource Descriptors.
218 */
219 if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
220 (addr->min_address_fixed && addr->max_address_fixed && !len))
221 pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
222 addr->min_address_fixed, addr->max_address_fixed, len);
223
224 /*
225 * For bridges that translate addresses across the bridge,
226 * translation_offset is the offset that must be added to the
227 * address on the secondary side to obtain the address on the
228 * primary side. Non-bridge devices must list 0 for all Address
229 * Translation offset bits.
230 */
231 if (addr->producer_consumer == ACPI_PRODUCER)
232 offset = attr->translation_offset;
233 else if (attr->translation_offset)
234 pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
235 attr->translation_offset);
236 start = attr->minimum + offset;
237 end = attr->maximum + offset;
238
239 win->offset = offset;
240 res->start = start;
241 res->end = end;
242 if (sizeof(resource_size_t) < sizeof(u64) &&
243 (offset != win->offset || start != res->start || end != res->end)) {
244 pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
245 attr->minimum, attr->maximum);
246 return false;
247 }
248
249 switch (addr->resource_type) {
250 case ACPI_MEMORY_RANGE:
251 acpi_dev_memresource_flags(res, len, wp);
252 break;
253 case ACPI_IO_RANGE:
254 acpi_dev_ioresource_flags(res, len, iodec,
255 addr->info.io.translation_type);
256 break;
257 case ACPI_BUS_NUMBER_RANGE:
258 res->flags = IORESOURCE_BUS;
259 break;
260 default:
261 return false;
262 }
263
264 if (addr->producer_consumer == ACPI_PRODUCER)
265 res->flags |= IORESOURCE_WINDOW;
266
267 if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
268 res->flags |= IORESOURCE_PREFETCH;
269
270 return !(res->flags & IORESOURCE_DISABLED);
271}
272
273/**
274 * acpi_dev_resource_address_space - Extract ACPI address space information.
275 * @ares: Input ACPI resource object.
276 * @win: Output generic resource object.
277 *
278 * Check if the given ACPI resource object represents an address space resource
279 * and if that's the case, use the information in it to populate the generic
280 * resource object pointed to by @win.
281 *
282 * Return:
283 * 1) false with win->res.flags setting to zero: not the expected resource type
284 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
285 * resource
286 * 3) true: valid assigned resource
287 */
288bool acpi_dev_resource_address_space(struct acpi_resource *ares,
289 struct resource_win *win)
290{
291 struct acpi_resource_address64 addr;
292
293 win->res.flags = 0;
294 if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
295 return false;
296
297 return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
298 &addr.address);
299}
300EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
301
302/**
303 * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
304 * @ares: Input ACPI resource object.
305 * @win: Output generic resource object.
306 *
307 * Check if the given ACPI resource object represents an extended address space
308 * resource and if that's the case, use the information in it to populate the
309 * generic resource object pointed to by @win.
310 *
311 * Return:
312 * 1) false with win->res.flags setting to zero: not the expected resource type
313 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
314 * resource
315 * 3) true: valid assigned resource
316 */
317bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
318 struct resource_win *win)
319{
320 struct acpi_resource_extended_address64 *ext_addr;
321
322 win->res.flags = 0;
323 if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
324 return false;
325
326 ext_addr = &ares->data.ext_address64;
327
328 return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
329 &ext_addr->address);
330}
331EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
332
333/**
334 * acpi_dev_irq_flags - Determine IRQ resource flags.
335 * @triggering: Triggering type as provided by ACPI.
336 * @polarity: Interrupt polarity as provided by ACPI.
337 * @shareable: Whether or not the interrupt is shareable.
338 */
339unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
340{
341 unsigned long flags;
342
343 if (triggering == ACPI_LEVEL_SENSITIVE)
344 flags = polarity == ACPI_ACTIVE_LOW ?
345 IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
346 else
347 flags = polarity == ACPI_ACTIVE_LOW ?
348 IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
349
350 if (shareable == ACPI_SHARED)
351 flags |= IORESOURCE_IRQ_SHAREABLE;
352
353 return flags | IORESOURCE_IRQ;
354}
355EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
356
357/**
358 * acpi_dev_get_irq_type - Determine irq type.
359 * @triggering: Triggering type as provided by ACPI.
360 * @polarity: Interrupt polarity as provided by ACPI.
361 */
362unsigned int acpi_dev_get_irq_type(int triggering, int polarity)
363{
364 switch (polarity) {
365 case ACPI_ACTIVE_LOW:
366 return triggering == ACPI_EDGE_SENSITIVE ?
367 IRQ_TYPE_EDGE_FALLING :
368 IRQ_TYPE_LEVEL_LOW;
369 case ACPI_ACTIVE_HIGH:
370 return triggering == ACPI_EDGE_SENSITIVE ?
371 IRQ_TYPE_EDGE_RISING :
372 IRQ_TYPE_LEVEL_HIGH;
373 case ACPI_ACTIVE_BOTH:
374 if (triggering == ACPI_EDGE_SENSITIVE)
375 return IRQ_TYPE_EDGE_BOTH;
376 fallthrough;
377 default:
378 return IRQ_TYPE_NONE;
379 }
380}
381EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
382
383static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
384{
385 res->start = gsi;
386 res->end = gsi;
387 res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
388}
389
390static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
391 u8 triggering, u8 polarity, u8 shareable,
392 bool legacy)
393{
394 int irq, p, t;
395
396 if (!valid_IRQ(gsi)) {
397 acpi_dev_irqresource_disabled(res, gsi);
398 return;
399 }
400
401 /*
402 * In IO-APIC mode, use overridden attribute. Two reasons:
403 * 1. BIOS bug in DSDT
404 * 2. BIOS uses IO-APIC mode Interrupt Source Override
405 *
406 * We do this only if we are dealing with IRQ() or IRQNoFlags()
407 * resource (the legacy ISA resources). With modern ACPI 5 devices
408 * using extended IRQ descriptors we take the IRQ configuration
409 * from _CRS directly.
410 */
411 if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
412 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
413 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
414
415 if (triggering != trig || polarity != pol) {
416 pr_warn("ACPI: IRQ %d override to %s, %s\n", gsi,
417 t ? "level" : "edge", p ? "low" : "high");
418 triggering = trig;
419 polarity = pol;
420 }
421 }
422
423 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
424 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
425 if (irq >= 0) {
426 res->start = irq;
427 res->end = irq;
428 } else {
429 acpi_dev_irqresource_disabled(res, gsi);
430 }
431}
432
433/**
434 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
435 * @ares: Input ACPI resource object.
436 * @index: Index into the array of GSIs represented by the resource.
437 * @res: Output generic resource object.
438 *
439 * Check if the given ACPI resource object represents an interrupt resource
440 * and @index does not exceed the resource's interrupt count (true is returned
441 * in that case regardless of the results of the other checks)). If that's the
442 * case, register the GSI corresponding to @index from the array of interrupts
443 * represented by the resource and populate the generic resource object pointed
444 * to by @res accordingly. If the registration of the GSI is not successful,
445 * IORESOURCE_DISABLED will be set it that object's flags.
446 *
447 * Return:
448 * 1) false with res->flags setting to zero: not the expected resource type
449 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
450 * 3) true: valid assigned resource
451 */
452bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
453 struct resource *res)
454{
455 struct acpi_resource_irq *irq;
456 struct acpi_resource_extended_irq *ext_irq;
457
458 switch (ares->type) {
459 case ACPI_RESOURCE_TYPE_IRQ:
460 /*
461 * Per spec, only one interrupt per descriptor is allowed in
462 * _CRS, but some firmware violates this, so parse them all.
463 */
464 irq = &ares->data.irq;
465 if (index >= irq->interrupt_count) {
466 acpi_dev_irqresource_disabled(res, 0);
467 return false;
468 }
469 acpi_dev_get_irqresource(res, irq->interrupts[index],
470 irq->triggering, irq->polarity,
471 irq->shareable, true);
472 break;
473 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
474 ext_irq = &ares->data.extended_irq;
475 if (index >= ext_irq->interrupt_count) {
476 acpi_dev_irqresource_disabled(res, 0);
477 return false;
478 }
479 if (is_gsi(ext_irq))
480 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
481 ext_irq->triggering, ext_irq->polarity,
482 ext_irq->shareable, false);
483 else
484 acpi_dev_irqresource_disabled(res, 0);
485 break;
486 default:
487 res->flags = 0;
488 return false;
489 }
490
491 return true;
492}
493EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
494
495/**
496 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
497 * @list: The head of the resource list to free.
498 */
499void acpi_dev_free_resource_list(struct list_head *list)
500{
501 resource_list_free(list);
502}
503EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
504
505struct res_proc_context {
506 struct list_head *list;
507 int (*preproc)(struct acpi_resource *, void *);
508 void *preproc_data;
509 int count;
510 int error;
511};
512
513static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
514 struct res_proc_context *c)
515{
516 struct resource_entry *rentry;
517
518 rentry = resource_list_create_entry(NULL, 0);
519 if (!rentry) {
520 c->error = -ENOMEM;
521 return AE_NO_MEMORY;
522 }
523 *rentry->res = win->res;
524 rentry->offset = win->offset;
525 resource_list_add_tail(rentry, c->list);
526 c->count++;
527 return AE_OK;
528}
529
530static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
531 void *context)
532{
533 struct res_proc_context *c = context;
534 struct resource_win win;
535 struct resource *res = &win.res;
536 int i;
537
538 if (c->preproc) {
539 int ret;
540
541 ret = c->preproc(ares, c->preproc_data);
542 if (ret < 0) {
543 c->error = ret;
544 return AE_CTRL_TERMINATE;
545 } else if (ret > 0) {
546 return AE_OK;
547 }
548 }
549
550 memset(&win, 0, sizeof(win));
551
552 if (acpi_dev_resource_memory(ares, res)
553 || acpi_dev_resource_io(ares, res)
554 || acpi_dev_resource_address_space(ares, &win)
555 || acpi_dev_resource_ext_address_space(ares, &win))
556 return acpi_dev_new_resource_entry(&win, c);
557
558 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
559 acpi_status status;
560
561 status = acpi_dev_new_resource_entry(&win, c);
562 if (ACPI_FAILURE(status))
563 return status;
564 }
565
566 return AE_OK;
567}
568
569static int __acpi_dev_get_resources(struct acpi_device *adev,
570 struct list_head *list,
571 int (*preproc)(struct acpi_resource *, void *),
572 void *preproc_data, char *method)
573{
574 struct res_proc_context c;
575 acpi_status status;
576
577 if (!adev || !adev->handle || !list_empty(list))
578 return -EINVAL;
579
580 if (!acpi_has_method(adev->handle, method))
581 return 0;
582
583 c.list = list;
584 c.preproc = preproc;
585 c.preproc_data = preproc_data;
586 c.count = 0;
587 c.error = 0;
588 status = acpi_walk_resources(adev->handle, method,
589 acpi_dev_process_resource, &c);
590 if (ACPI_FAILURE(status)) {
591 acpi_dev_free_resource_list(list);
592 return c.error ? c.error : -EIO;
593 }
594
595 return c.count;
596}
597
598/**
599 * acpi_dev_get_resources - Get current resources of a device.
600 * @adev: ACPI device node to get the resources for.
601 * @list: Head of the resultant list of resources (must be empty).
602 * @preproc: The caller's preprocessing routine.
603 * @preproc_data: Pointer passed to the caller's preprocessing routine.
604 *
605 * Evaluate the _CRS method for the given device node and process its output by
606 * (1) executing the @preproc() rountine provided by the caller, passing the
607 * resource pointer and @preproc_data to it as arguments, for each ACPI resource
608 * returned and (2) converting all of the returned ACPI resources into struct
609 * resource objects if possible. If the return value of @preproc() in step (1)
610 * is different from 0, step (2) is not applied to the given ACPI resource and
611 * if that value is negative, the whole processing is aborted and that value is
612 * returned as the final error code.
613 *
614 * The resultant struct resource objects are put on the list pointed to by
615 * @list, that must be empty initially, as members of struct resource_entry
616 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
617 * free that list.
618 *
619 * The number of resources in the output list is returned on success, an error
620 * code reflecting the error condition is returned otherwise.
621 */
622int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
623 int (*preproc)(struct acpi_resource *, void *),
624 void *preproc_data)
625{
626 return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
627 METHOD_NAME__CRS);
628}
629EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
630
631static int is_memory(struct acpi_resource *ares, void *not_used)
632{
633 struct resource_win win;
634 struct resource *res = &win.res;
635
636 memset(&win, 0, sizeof(win));
637
638 return !(acpi_dev_resource_memory(ares, res)
639 || acpi_dev_resource_address_space(ares, &win)
640 || acpi_dev_resource_ext_address_space(ares, &win));
641}
642
643/**
644 * acpi_dev_get_dma_resources - Get current DMA resources of a device.
645 * @adev: ACPI device node to get the resources for.
646 * @list: Head of the resultant list of resources (must be empty).
647 *
648 * Evaluate the _DMA method for the given device node and process its
649 * output.
650 *
651 * The resultant struct resource objects are put on the list pointed to
652 * by @list, that must be empty initially, as members of struct
653 * resource_entry objects. Callers of this routine should use
654 * %acpi_dev_free_resource_list() to free that list.
655 *
656 * The number of resources in the output list is returned on success,
657 * an error code reflecting the error condition is returned otherwise.
658 */
659int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
660{
661 return __acpi_dev_get_resources(adev, list, is_memory, NULL,
662 METHOD_NAME__DMA);
663}
664EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
665
666/**
667 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
668 * types
669 * @ares: Input ACPI resource object.
670 * @types: Valid resource types of IORESOURCE_XXX
671 *
672 * This is a helper function to support acpi_dev_get_resources(), which filters
673 * ACPI resource objects according to resource types.
674 */
675int acpi_dev_filter_resource_type(struct acpi_resource *ares,
676 unsigned long types)
677{
678 unsigned long type = 0;
679
680 switch (ares->type) {
681 case ACPI_RESOURCE_TYPE_MEMORY24:
682 case ACPI_RESOURCE_TYPE_MEMORY32:
683 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
684 type = IORESOURCE_MEM;
685 break;
686 case ACPI_RESOURCE_TYPE_IO:
687 case ACPI_RESOURCE_TYPE_FIXED_IO:
688 type = IORESOURCE_IO;
689 break;
690 case ACPI_RESOURCE_TYPE_IRQ:
691 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
692 type = IORESOURCE_IRQ;
693 break;
694 case ACPI_RESOURCE_TYPE_DMA:
695 case ACPI_RESOURCE_TYPE_FIXED_DMA:
696 type = IORESOURCE_DMA;
697 break;
698 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
699 type = IORESOURCE_REG;
700 break;
701 case ACPI_RESOURCE_TYPE_ADDRESS16:
702 case ACPI_RESOURCE_TYPE_ADDRESS32:
703 case ACPI_RESOURCE_TYPE_ADDRESS64:
704 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
705 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
706 type = IORESOURCE_MEM;
707 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
708 type = IORESOURCE_IO;
709 else if (ares->data.address.resource_type ==
710 ACPI_BUS_NUMBER_RANGE)
711 type = IORESOURCE_BUS;
712 break;
713 default:
714 break;
715 }
716
717 return (type & types) ? 0 : 1;
718}
719EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
720
721static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
722{
723 struct list_head resource_list;
724 struct resource_entry *rentry;
725 int ret, found = 0;
726
727 INIT_LIST_HEAD(&resource_list);
728 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
729 if (ret < 0)
730 return 0;
731
732 list_for_each_entry(rentry, &resource_list, node) {
733 if (resource_contains(rentry->res, res)) {
734 found = 1;
735 break;
736 }
737
738 }
739
740 acpi_dev_free_resource_list(&resource_list);
741 return found;
742}
743
744static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
745 void *context, void **ret)
746{
747 struct resource *res = context;
748 struct acpi_device **consumer = (struct acpi_device **) ret;
749 struct acpi_device *adev;
750
751 if (acpi_bus_get_device(handle, &adev))
752 return AE_OK;
753
754 if (acpi_dev_consumes_res(adev, res)) {
755 *consumer = adev;
756 return AE_CTRL_TERMINATE;
757 }
758
759 return AE_OK;
760}
761
762/**
763 * acpi_resource_consumer - Find the ACPI device that consumes @res.
764 * @res: Resource to search for.
765 *
766 * Search the current resource settings (_CRS) of every ACPI device node
767 * for @res. If we find an ACPI device whose _CRS includes @res, return
768 * it. Otherwise, return NULL.
769 */
770struct acpi_device *acpi_resource_consumer(struct resource *res)
771{
772 struct acpi_device *consumer = NULL;
773
774 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);
775 return consumer;
776}
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 B1502CVA */
473 .matches = {
474 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
475 DMI_MATCH(DMI_BOARD_NAME, "B1502CVA"),
476 },
477 },
478 {
479 /* Asus ExpertBook B2402CBA */
480 .matches = {
481 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
482 DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"),
483 },
484 },
485 {
486 /* Asus ExpertBook B2402FBA */
487 .matches = {
488 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
489 DMI_MATCH(DMI_BOARD_NAME, "B2402FBA"),
490 },
491 },
492 {
493 /* Asus ExpertBook B2502 */
494 .matches = {
495 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
496 DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"),
497 },
498 },
499 {
500 /* Asus ExpertBook B2502FBA */
501 .matches = {
502 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
503 DMI_MATCH(DMI_BOARD_NAME, "B2502FBA"),
504 },
505 },
506 {
507 /* Asus Vivobook E1504GA */
508 .matches = {
509 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
510 DMI_MATCH(DMI_BOARD_NAME, "E1504GA"),
511 },
512 },
513 {
514 /* Asus Vivobook E1504GAB */
515 .matches = {
516 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
517 DMI_MATCH(DMI_BOARD_NAME, "E1504GAB"),
518 },
519 },
520 {
521 /* LG Electronics 17U70P */
522 .matches = {
523 DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
524 DMI_MATCH(DMI_BOARD_NAME, "17U70P"),
525 },
526 },
527 { }
528};
529
530/*
531 * DMI matches for AMD Zen boards where the DSDT specifies the kbd IRQ
532 * as falling edge and this must be overridden to rising edge,
533 * to have a working keyboard.
534 */
535static const struct dmi_system_id irq1_edge_low_force_override[] = {
536 {
537 /* TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD */
538 .matches = {
539 DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
540 },
541 },
542 {
543 /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */
544 .matches = {
545 DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"),
546 },
547 },
548 {
549 /* TongFang GMxXGxx sold as Eluktronics Inc. RP-15 */
550 .matches = {
551 DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."),
552 DMI_MATCH(DMI_BOARD_NAME, "RP-15"),
553 },
554 },
555 {
556 /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */
557 .matches = {
558 DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"),
559 },
560 },
561 {
562 /* MAINGEAR Vector Pro 2 15 */
563 .matches = {
564 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
565 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"),
566 }
567 },
568 {
569 /* MAINGEAR Vector Pro 2 17 */
570 .matches = {
571 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
572 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"),
573 },
574 },
575 {
576 /* TongFang GM6BGEQ / PCSpecialist Elimina Pro 16 M, RTX 3050 */
577 .matches = {
578 DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"),
579 },
580 },
581 {
582 /* TongFang GM6BG5Q, RTX 4050 */
583 .matches = {
584 DMI_MATCH(DMI_BOARD_NAME, "GM6BG5Q"),
585 },
586 },
587 {
588 /* TongFang GM6BG0Q / PCSpecialist Elimina Pro 16 M, RTX 4060 */
589 .matches = {
590 DMI_MATCH(DMI_BOARD_NAME, "GM6BG0Q"),
591 },
592 },
593 {
594 /* Infinity E15-5A165-BM */
595 .matches = {
596 DMI_MATCH(DMI_BOARD_NAME, "GM5RG1E0009COM"),
597 },
598 },
599 {
600 /* Infinity E15-5A305-1M */
601 .matches = {
602 DMI_MATCH(DMI_BOARD_NAME, "GM5RGEE0016COM"),
603 },
604 },
605 {
606 /* Lunnen Ground 15 / AMD Ryzen 5 5500U */
607 .matches = {
608 DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"),
609 DMI_MATCH(DMI_BOARD_NAME, "LLL5DAW"),
610 },
611 },
612 {
613 /* Lunnen Ground 16 / AMD Ryzen 7 5800U */
614 .matches = {
615 DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"),
616 DMI_MATCH(DMI_BOARD_NAME, "LL6FA"),
617 },
618 },
619 {
620 /* MAIBENBEN X577 */
621 .matches = {
622 DMI_MATCH(DMI_SYS_VENDOR, "MAIBENBEN"),
623 DMI_MATCH(DMI_BOARD_NAME, "X577"),
624 },
625 },
626 {
627 /* Maibenben X565 */
628 .matches = {
629 DMI_MATCH(DMI_SYS_VENDOR, "MAIBENBEN"),
630 DMI_MATCH(DMI_BOARD_NAME, "X565"),
631 },
632 },
633 { }
634};
635
636struct irq_override_cmp {
637 const struct dmi_system_id *system;
638 unsigned char irq;
639 unsigned char triggering;
640 unsigned char polarity;
641 unsigned char shareable;
642 bool override;
643};
644
645static const struct irq_override_cmp override_table[] = {
646 { irq1_level_low_skip_override, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
647 { irq1_edge_low_force_override, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
648};
649
650static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
651 u8 shareable)
652{
653 int i;
654
655 for (i = 0; i < ARRAY_SIZE(override_table); i++) {
656 const struct irq_override_cmp *entry = &override_table[i];
657
658 if (dmi_check_system(entry->system) &&
659 entry->irq == gsi &&
660 entry->triggering == triggering &&
661 entry->polarity == polarity &&
662 entry->shareable == shareable)
663 return entry->override;
664 }
665
666#ifdef CONFIG_X86
667 /*
668 * Always use the MADT override info, except for the i8042 PS/2 ctrl
669 * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes
670 * be used otherwise PS/2 keyboards / mice will not work.
671 */
672 if (gsi != 1 && gsi != 12)
673 return true;
674
675 /* If the override comes from an INT_SRC_OVR MADT entry, honor it. */
676 if (acpi_int_src_ovr[gsi])
677 return true;
678
679 /*
680 * IRQ override isn't needed on modern AMD Zen systems and
681 * this override breaks active low IRQs on AMD Ryzen 6000 and
682 * newer systems. Skip it.
683 */
684 if (boot_cpu_has(X86_FEATURE_ZEN))
685 return false;
686#endif
687
688 return true;
689}
690
691static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
692 u8 triggering, u8 polarity, u8 shareable,
693 u8 wake_capable, bool check_override)
694{
695 int irq, p, t;
696
697 if (!valid_IRQ(gsi)) {
698 irqresource_disabled(res, gsi);
699 return;
700 }
701
702 /*
703 * In IO-APIC mode, use overridden attribute. Two reasons:
704 * 1. BIOS bug in DSDT
705 * 2. BIOS uses IO-APIC mode Interrupt Source Override
706 *
707 * We do this only if we are dealing with IRQ() or IRQNoFlags()
708 * resource (the legacy ISA resources). With modern ACPI 5 devices
709 * using extended IRQ descriptors we take the IRQ configuration
710 * from _CRS directly.
711 */
712 if (check_override &&
713 acpi_dev_irq_override(gsi, triggering, polarity, shareable) &&
714 !acpi_get_override_irq(gsi, &t, &p)) {
715 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
716 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
717
718 if (triggering != trig || polarity != pol) {
719 pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi,
720 t ? "level" : "edge",
721 trig == triggering ? "" : "(!)",
722 p ? "low" : "high",
723 pol == polarity ? "" : "(!)");
724 triggering = trig;
725 polarity = pol;
726 }
727 }
728
729 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
730 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
731 if (irq >= 0) {
732 res->start = irq;
733 res->end = irq;
734 } else {
735 irqresource_disabled(res, gsi);
736 }
737}
738
739/**
740 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
741 * @ares: Input ACPI resource object.
742 * @index: Index into the array of GSIs represented by the resource.
743 * @res: Output generic resource object.
744 *
745 * Check if the given ACPI resource object represents an interrupt resource
746 * and @index does not exceed the resource's interrupt count (true is returned
747 * in that case regardless of the results of the other checks)). If that's the
748 * case, register the GSI corresponding to @index from the array of interrupts
749 * represented by the resource and populate the generic resource object pointed
750 * to by @res accordingly. If the registration of the GSI is not successful,
751 * IORESOURCE_DISABLED will be set it that object's flags.
752 *
753 * Return:
754 * 1) false with res->flags setting to zero: not the expected resource type
755 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
756 * 3) true: valid assigned resource
757 */
758bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
759 struct resource *res)
760{
761 struct acpi_resource_irq *irq;
762 struct acpi_resource_extended_irq *ext_irq;
763
764 switch (ares->type) {
765 case ACPI_RESOURCE_TYPE_IRQ:
766 /*
767 * Per spec, only one interrupt per descriptor is allowed in
768 * _CRS, but some firmware violates this, so parse them all.
769 */
770 irq = &ares->data.irq;
771 if (index >= irq->interrupt_count) {
772 irqresource_disabled(res, 0);
773 return false;
774 }
775 acpi_dev_get_irqresource(res, irq->interrupts[index],
776 irq->triggering, irq->polarity,
777 irq->shareable, irq->wake_capable,
778 true);
779 break;
780 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
781 ext_irq = &ares->data.extended_irq;
782 if (index >= ext_irq->interrupt_count) {
783 irqresource_disabled(res, 0);
784 return false;
785 }
786 if (is_gsi(ext_irq))
787 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
788 ext_irq->triggering, ext_irq->polarity,
789 ext_irq->shareable, ext_irq->wake_capable,
790 false);
791 else
792 irqresource_disabled(res, 0);
793 break;
794 default:
795 res->flags = 0;
796 return false;
797 }
798
799 return true;
800}
801EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
802
803/**
804 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
805 * @list: The head of the resource list to free.
806 */
807void acpi_dev_free_resource_list(struct list_head *list)
808{
809 resource_list_free(list);
810}
811EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
812
813struct res_proc_context {
814 struct list_head *list;
815 int (*preproc)(struct acpi_resource *, void *);
816 void *preproc_data;
817 int count;
818 int error;
819};
820
821static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
822 struct res_proc_context *c)
823{
824 struct resource_entry *rentry;
825
826 rentry = resource_list_create_entry(NULL, 0);
827 if (!rentry) {
828 c->error = -ENOMEM;
829 return AE_NO_MEMORY;
830 }
831 *rentry->res = win->res;
832 rentry->offset = win->offset;
833 resource_list_add_tail(rentry, c->list);
834 c->count++;
835 return AE_OK;
836}
837
838static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
839 void *context)
840{
841 struct res_proc_context *c = context;
842 struct resource_win win;
843 struct resource *res = &win.res;
844 int i;
845
846 if (c->preproc) {
847 int ret;
848
849 ret = c->preproc(ares, c->preproc_data);
850 if (ret < 0) {
851 c->error = ret;
852 return AE_ABORT_METHOD;
853 } else if (ret > 0) {
854 return AE_OK;
855 }
856 }
857
858 memset(&win, 0, sizeof(win));
859
860 if (acpi_dev_resource_memory(ares, res)
861 || acpi_dev_resource_io(ares, res)
862 || acpi_dev_resource_address_space(ares, &win)
863 || acpi_dev_resource_ext_address_space(ares, &win))
864 return acpi_dev_new_resource_entry(&win, c);
865
866 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
867 acpi_status status;
868
869 status = acpi_dev_new_resource_entry(&win, c);
870 if (ACPI_FAILURE(status))
871 return status;
872 }
873
874 return AE_OK;
875}
876
877static int __acpi_dev_get_resources(struct acpi_device *adev,
878 struct list_head *list,
879 int (*preproc)(struct acpi_resource *, void *),
880 void *preproc_data, char *method)
881{
882 struct res_proc_context c;
883 acpi_status status;
884
885 if (!adev || !adev->handle || !list_empty(list))
886 return -EINVAL;
887
888 if (!acpi_has_method(adev->handle, method))
889 return 0;
890
891 c.list = list;
892 c.preproc = preproc;
893 c.preproc_data = preproc_data;
894 c.count = 0;
895 c.error = 0;
896 status = acpi_walk_resources(adev->handle, method,
897 acpi_dev_process_resource, &c);
898 if (ACPI_FAILURE(status)) {
899 acpi_dev_free_resource_list(list);
900 return c.error ? c.error : -EIO;
901 }
902
903 return c.count;
904}
905
906/**
907 * acpi_dev_get_resources - Get current resources of a device.
908 * @adev: ACPI device node to get the resources for.
909 * @list: Head of the resultant list of resources (must be empty).
910 * @preproc: The caller's preprocessing routine.
911 * @preproc_data: Pointer passed to the caller's preprocessing routine.
912 *
913 * Evaluate the _CRS method for the given device node and process its output by
914 * (1) executing the @preproc() routine provided by the caller, passing the
915 * resource pointer and @preproc_data to it as arguments, for each ACPI resource
916 * returned and (2) converting all of the returned ACPI resources into struct
917 * resource objects if possible. If the return value of @preproc() in step (1)
918 * is different from 0, step (2) is not applied to the given ACPI resource and
919 * if that value is negative, the whole processing is aborted and that value is
920 * returned as the final error code.
921 *
922 * The resultant struct resource objects are put on the list pointed to by
923 * @list, that must be empty initially, as members of struct resource_entry
924 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
925 * free that list.
926 *
927 * The number of resources in the output list is returned on success, an error
928 * code reflecting the error condition is returned otherwise.
929 */
930int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
931 int (*preproc)(struct acpi_resource *, void *),
932 void *preproc_data)
933{
934 return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
935 METHOD_NAME__CRS);
936}
937EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
938
939static int is_memory(struct acpi_resource *ares, void *not_used)
940{
941 struct resource_win win;
942 struct resource *res = &win.res;
943
944 memset(&win, 0, sizeof(win));
945
946 if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM))
947 return 1;
948
949 return !(acpi_dev_resource_memory(ares, res)
950 || acpi_dev_resource_address_space(ares, &win)
951 || acpi_dev_resource_ext_address_space(ares, &win));
952}
953
954/**
955 * acpi_dev_get_dma_resources - Get current DMA resources of a device.
956 * @adev: ACPI device node to get the resources for.
957 * @list: Head of the resultant list of resources (must be empty).
958 *
959 * Evaluate the _DMA method for the given device node and process its
960 * output.
961 *
962 * The resultant struct resource objects are put on the list pointed to
963 * by @list, that must be empty initially, as members of struct
964 * resource_entry objects. Callers of this routine should use
965 * %acpi_dev_free_resource_list() to free that list.
966 *
967 * The number of resources in the output list is returned on success,
968 * an error code reflecting the error condition is returned otherwise.
969 */
970int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
971{
972 return __acpi_dev_get_resources(adev, list, is_memory, NULL,
973 METHOD_NAME__DMA);
974}
975EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
976
977/**
978 * acpi_dev_get_memory_resources - Get current memory resources of a device.
979 * @adev: ACPI device node to get the resources for.
980 * @list: Head of the resultant list of resources (must be empty).
981 *
982 * This is a helper function that locates all memory type resources of @adev
983 * with acpi_dev_get_resources().
984 *
985 * The number of resources in the output list is returned on success, an error
986 * code reflecting the error condition is returned otherwise.
987 */
988int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
989{
990 return acpi_dev_get_resources(adev, list, is_memory, NULL);
991}
992EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
993
994/**
995 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
996 * types
997 * @ares: Input ACPI resource object.
998 * @types: Valid resource types of IORESOURCE_XXX
999 *
1000 * This is a helper function to support acpi_dev_get_resources(), which filters
1001 * ACPI resource objects according to resource types.
1002 */
1003int acpi_dev_filter_resource_type(struct acpi_resource *ares,
1004 unsigned long types)
1005{
1006 unsigned long type = 0;
1007
1008 switch (ares->type) {
1009 case ACPI_RESOURCE_TYPE_MEMORY24:
1010 case ACPI_RESOURCE_TYPE_MEMORY32:
1011 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
1012 type = IORESOURCE_MEM;
1013 break;
1014 case ACPI_RESOURCE_TYPE_IO:
1015 case ACPI_RESOURCE_TYPE_FIXED_IO:
1016 type = IORESOURCE_IO;
1017 break;
1018 case ACPI_RESOURCE_TYPE_IRQ:
1019 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
1020 type = IORESOURCE_IRQ;
1021 break;
1022 case ACPI_RESOURCE_TYPE_DMA:
1023 case ACPI_RESOURCE_TYPE_FIXED_DMA:
1024 type = IORESOURCE_DMA;
1025 break;
1026 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
1027 type = IORESOURCE_REG;
1028 break;
1029 case ACPI_RESOURCE_TYPE_ADDRESS16:
1030 case ACPI_RESOURCE_TYPE_ADDRESS32:
1031 case ACPI_RESOURCE_TYPE_ADDRESS64:
1032 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
1033 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
1034 type = IORESOURCE_MEM;
1035 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
1036 type = IORESOURCE_IO;
1037 else if (ares->data.address.resource_type ==
1038 ACPI_BUS_NUMBER_RANGE)
1039 type = IORESOURCE_BUS;
1040 break;
1041 default:
1042 break;
1043 }
1044
1045 return (type & types) ? 0 : 1;
1046}
1047EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
1048
1049static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
1050{
1051 struct list_head resource_list;
1052 struct resource_entry *rentry;
1053 int ret, found = 0;
1054
1055 INIT_LIST_HEAD(&resource_list);
1056 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
1057 if (ret < 0)
1058 return 0;
1059
1060 list_for_each_entry(rentry, &resource_list, node) {
1061 if (resource_contains(rentry->res, res)) {
1062 found = 1;
1063 break;
1064 }
1065
1066 }
1067
1068 acpi_dev_free_resource_list(&resource_list);
1069 return found;
1070}
1071
1072static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
1073 void *context, void **ret)
1074{
1075 struct resource *res = context;
1076 struct acpi_device **consumer = (struct acpi_device **) ret;
1077 struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
1078
1079 if (!adev)
1080 return AE_OK;
1081
1082 if (acpi_dev_consumes_res(adev, res)) {
1083 *consumer = adev;
1084 return AE_CTRL_TERMINATE;
1085 }
1086
1087 return AE_OK;
1088}
1089
1090/**
1091 * acpi_resource_consumer - Find the ACPI device that consumes @res.
1092 * @res: Resource to search for.
1093 *
1094 * Search the current resource settings (_CRS) of every ACPI device node
1095 * for @res. If we find an ACPI device whose _CRS includes @res, return
1096 * it. Otherwise, return NULL.
1097 */
1098struct acpi_device *acpi_resource_consumer(struct resource *res)
1099{
1100 struct acpi_device *consumer = NULL;
1101
1102 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);
1103 return consumer;
1104}