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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
25 return res->end < 0x10003;
26}
27#else
28#define valid_IRQ(i) (true)
29
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31
32
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
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60
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}
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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}
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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
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217
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
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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}
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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);
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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
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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
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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_get_irqresource(struct resource *res, u32 gsi,
384 u8 triggering, u8 polarity, u8 shareable,
385 bool legacy)
386{
387 int irq, p, t;
388
389 if (!valid_IRQ(gsi)) {
390 irqresource_disabled(res, gsi);
391 return;
392 }
393
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404 if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
405 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
406 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
407
408 if (triggering != trig || polarity != pol) {
409 pr_warn("ACPI: IRQ %d override to %s, %s\n", gsi,
410 t ? "level" : "edge", p ? "low" : "high");
411 triggering = trig;
412 polarity = pol;
413 }
414 }
415
416 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
417 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
418 if (irq >= 0) {
419 res->start = irq;
420 res->end = irq;
421 } else {
422 irqresource_disabled(res, gsi);
423 }
424}
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445bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
446 struct resource *res)
447{
448 struct acpi_resource_irq *irq;
449 struct acpi_resource_extended_irq *ext_irq;
450
451 switch (ares->type) {
452 case ACPI_RESOURCE_TYPE_IRQ:
453
454
455
456
457 irq = &ares->data.irq;
458 if (index >= irq->interrupt_count) {
459 irqresource_disabled(res, 0);
460 return false;
461 }
462 acpi_dev_get_irqresource(res, irq->interrupts[index],
463 irq->triggering, irq->polarity,
464 irq->shareable, true);
465 break;
466 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
467 ext_irq = &ares->data.extended_irq;
468 if (index >= ext_irq->interrupt_count) {
469 irqresource_disabled(res, 0);
470 return false;
471 }
472 if (is_gsi(ext_irq))
473 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
474 ext_irq->triggering, ext_irq->polarity,
475 ext_irq->shareable, false);
476 else
477 irqresource_disabled(res, 0);
478 break;
479 default:
480 res->flags = 0;
481 return false;
482 }
483
484 return true;
485}
486EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
487
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491
492void acpi_dev_free_resource_list(struct list_head *list)
493{
494 resource_list_free(list);
495}
496EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
497
498struct res_proc_context {
499 struct list_head *list;
500 int (*preproc)(struct acpi_resource *, void *);
501 void *preproc_data;
502 int count;
503 int error;
504};
505
506static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
507 struct res_proc_context *c)
508{
509 struct resource_entry *rentry;
510
511 rentry = resource_list_create_entry(NULL, 0);
512 if (!rentry) {
513 c->error = -ENOMEM;
514 return AE_NO_MEMORY;
515 }
516 *rentry->res = win->res;
517 rentry->offset = win->offset;
518 resource_list_add_tail(rentry, c->list);
519 c->count++;
520 return AE_OK;
521}
522
523static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
524 void *context)
525{
526 struct res_proc_context *c = context;
527 struct resource_win win;
528 struct resource *res = &win.res;
529 int i;
530
531 if (c->preproc) {
532 int ret;
533
534 ret = c->preproc(ares, c->preproc_data);
535 if (ret < 0) {
536 c->error = ret;
537 return AE_ABORT_METHOD;
538 } else if (ret > 0) {
539 return AE_OK;
540 }
541 }
542
543 memset(&win, 0, sizeof(win));
544
545 if (acpi_dev_resource_memory(ares, res)
546 || acpi_dev_resource_io(ares, res)
547 || acpi_dev_resource_address_space(ares, &win)
548 || acpi_dev_resource_ext_address_space(ares, &win))
549 return acpi_dev_new_resource_entry(&win, c);
550
551 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
552 acpi_status status;
553
554 status = acpi_dev_new_resource_entry(&win, c);
555 if (ACPI_FAILURE(status))
556 return status;
557 }
558
559 return AE_OK;
560}
561
562static int __acpi_dev_get_resources(struct acpi_device *adev,
563 struct list_head *list,
564 int (*preproc)(struct acpi_resource *, void *),
565 void *preproc_data, char *method)
566{
567 struct res_proc_context c;
568 acpi_status status;
569
570 if (!adev || !adev->handle || !list_empty(list))
571 return -EINVAL;
572
573 if (!acpi_has_method(adev->handle, method))
574 return 0;
575
576 c.list = list;
577 c.preproc = preproc;
578 c.preproc_data = preproc_data;
579 c.count = 0;
580 c.error = 0;
581 status = acpi_walk_resources(adev->handle, method,
582 acpi_dev_process_resource, &c);
583 if (ACPI_FAILURE(status)) {
584 acpi_dev_free_resource_list(list);
585 return c.error ? c.error : -EIO;
586 }
587
588 return c.count;
589}
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615int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
616 int (*preproc)(struct acpi_resource *, void *),
617 void *preproc_data)
618{
619 return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
620 METHOD_NAME__CRS);
621}
622EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
623
624static int is_memory(struct acpi_resource *ares, void *not_used)
625{
626 struct resource_win win;
627 struct resource *res = &win.res;
628
629 memset(&win, 0, sizeof(win));
630
631 return !(acpi_dev_resource_memory(ares, res)
632 || acpi_dev_resource_address_space(ares, &win)
633 || acpi_dev_resource_ext_address_space(ares, &win));
634}
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652int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
653{
654 return __acpi_dev_get_resources(adev, list, is_memory, NULL,
655 METHOD_NAME__DMA);
656}
657EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
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667
668int acpi_dev_filter_resource_type(struct acpi_resource *ares,
669 unsigned long types)
670{
671 unsigned long type = 0;
672
673 switch (ares->type) {
674 case ACPI_RESOURCE_TYPE_MEMORY24:
675 case ACPI_RESOURCE_TYPE_MEMORY32:
676 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
677 type = IORESOURCE_MEM;
678 break;
679 case ACPI_RESOURCE_TYPE_IO:
680 case ACPI_RESOURCE_TYPE_FIXED_IO:
681 type = IORESOURCE_IO;
682 break;
683 case ACPI_RESOURCE_TYPE_IRQ:
684 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
685 type = IORESOURCE_IRQ;
686 break;
687 case ACPI_RESOURCE_TYPE_DMA:
688 case ACPI_RESOURCE_TYPE_FIXED_DMA:
689 type = IORESOURCE_DMA;
690 break;
691 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
692 type = IORESOURCE_REG;
693 break;
694 case ACPI_RESOURCE_TYPE_ADDRESS16:
695 case ACPI_RESOURCE_TYPE_ADDRESS32:
696 case ACPI_RESOURCE_TYPE_ADDRESS64:
697 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
698 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
699 type = IORESOURCE_MEM;
700 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
701 type = IORESOURCE_IO;
702 else if (ares->data.address.resource_type ==
703 ACPI_BUS_NUMBER_RANGE)
704 type = IORESOURCE_BUS;
705 break;
706 default:
707 break;
708 }
709
710 return (type & types) ? 0 : 1;
711}
712EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
713
714static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
715{
716 struct list_head resource_list;
717 struct resource_entry *rentry;
718 int ret, found = 0;
719
720 INIT_LIST_HEAD(&resource_list);
721 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
722 if (ret < 0)
723 return 0;
724
725 list_for_each_entry(rentry, &resource_list, node) {
726 if (resource_contains(rentry->res, res)) {
727 found = 1;
728 break;
729 }
730
731 }
732
733 acpi_dev_free_resource_list(&resource_list);
734 return found;
735}
736
737static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
738 void *context, void **ret)
739{
740 struct resource *res = context;
741 struct acpi_device **consumer = (struct acpi_device **) ret;
742 struct acpi_device *adev;
743
744 if (acpi_bus_get_device(handle, &adev))
745 return AE_OK;
746
747 if (acpi_dev_consumes_res(adev, res)) {
748 *consumer = adev;
749 return AE_CTRL_TERMINATE;
750 }
751
752 return AE_OK;
753}
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763struct acpi_device *acpi_resource_consumer(struct resource *res)
764{
765 struct acpi_device *consumer = NULL;
766
767 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);
768 return consumer;
769}
770