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