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 		/* Asus ExpertBook B1402CVA */
451 		.matches = {
452 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
453 			DMI_MATCH(DMI_BOARD_NAME, "B1402CVA"),
454 		},
455 	},
456 	{
457 		.ident = "Asus ExpertBook B1502CBA",
458 		.matches = {
459 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
460 			DMI_MATCH(DMI_BOARD_NAME, "B1502CBA"),
461 		},
462 	},
463 	{
464 		.ident = "Asus ExpertBook B2402CBA",
465 		.matches = {
466 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
467 			DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"),
468 		},
469 	},
470 	{
471 		.ident = "Asus ExpertBook B2402FBA",
472 		.matches = {
473 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
474 			DMI_MATCH(DMI_BOARD_NAME, "B2402FBA"),
475 		},
476 	},
477 	{
478 		.ident = "Asus ExpertBook B2502",
479 		.matches = {
480 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
481 			DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"),
482 		},
483 	},
484 	{ }
485 };
486 
487 static const struct dmi_system_id tongfang_gm_rg[] = {
488 	{
489 		.ident = "TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD",
490 		.matches = {
491 			DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
492 		},
493 	},
494 	{ }
495 };
496 
497 static const struct dmi_system_id maingear_laptop[] = {
498 	{
499 		.ident = "MAINGEAR Vector Pro 2 15",
500 		.matches = {
501 			DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
502 			DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"),
503 		}
504 	},
505 	{
506 		/* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */
507 		.matches = {
508 			DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"),
509 		},
510 	},
511 	{
512 		/* TongFang GMxXGxx sold as Eluktronics Inc. RP-15 */
513 		.matches = {
514 			DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."),
515 			DMI_MATCH(DMI_BOARD_NAME, "RP-15"),
516 		},
517 	},
518 	{
519 		/* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */
520 		.matches = {
521 			DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"),
522 		},
523 	},
524 	{
525 		.ident = "MAINGEAR Vector Pro 2 17",
526 		.matches = {
527 			DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
528 			DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"),
529 		},
530 	},
531 	{ }
532 };
533 
534 static const struct dmi_system_id pcspecialist_laptop[] = {
535 	{
536 		/* TongFang GM6BGEQ / PCSpecialist Elimina Pro 16 M, RTX 3050 */
537 		.matches = {
538 			DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"),
539 		},
540 	},
541 	{
542 		/* TongFang GM6BG5Q, RTX 4050 */
543 		.matches = {
544 			DMI_MATCH(DMI_BOARD_NAME, "GM6BG5Q"),
545 		},
546 	},
547 	{
548 		/* TongFang GM6BG0Q / PCSpecialist Elimina Pro 16 M, RTX 4060 */
549 		.matches = {
550 			DMI_MATCH(DMI_BOARD_NAME, "GM6BG0Q"),
551 		},
552 	},
553 	{ }
554 };
555 
556 static const struct dmi_system_id lg_laptop[] = {
557 	{
558 		.ident = "LG Electronics 17U70P",
559 		.matches = {
560 			DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
561 			DMI_MATCH(DMI_BOARD_NAME, "17U70P"),
562 		},
563 	},
564 	{ }
565 };
566 
567 struct irq_override_cmp {
568 	const struct dmi_system_id *system;
569 	unsigned char irq;
570 	unsigned char triggering;
571 	unsigned char polarity;
572 	unsigned char shareable;
573 	bool override;
574 };
575 
576 static const struct irq_override_cmp override_table[] = {
577 	{ medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
578 	{ asus_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
579 	{ tongfang_gm_rg, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
580 	{ maingear_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
581 	{ pcspecialist_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
582 	{ lg_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
583 };
584 
acpi_dev_irq_override(u32 gsi,u8 triggering,u8 polarity,u8 shareable)585 static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
586 				  u8 shareable)
587 {
588 	int i;
589 
590 	for (i = 0; i < ARRAY_SIZE(override_table); i++) {
591 		const struct irq_override_cmp *entry = &override_table[i];
592 
593 		if (dmi_check_system(entry->system) &&
594 		    entry->irq == gsi &&
595 		    entry->triggering == triggering &&
596 		    entry->polarity == polarity &&
597 		    entry->shareable == shareable)
598 			return entry->override;
599 	}
600 
601 #ifdef CONFIG_X86
602 	/*
603 	 * Always use the MADT override info, except for the i8042 PS/2 ctrl
604 	 * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes
605 	 * be used otherwise PS/2 keyboards / mice will not work.
606 	 */
607 	if (gsi != 1 && gsi != 12)
608 		return true;
609 
610 	/* If the override comes from an INT_SRC_OVR MADT entry, honor it. */
611 	if (acpi_int_src_ovr[gsi])
612 		return true;
613 
614 	/*
615 	 * IRQ override isn't needed on modern AMD Zen systems and
616 	 * this override breaks active low IRQs on AMD Ryzen 6000 and
617 	 * newer systems. Skip it.
618 	 */
619 	if (boot_cpu_has(X86_FEATURE_ZEN))
620 		return false;
621 #endif
622 
623 	return true;
624 }
625 
acpi_dev_get_irqresource(struct resource * res,u32 gsi,u8 triggering,u8 polarity,u8 shareable,u8 wake_capable,bool check_override)626 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
627 				     u8 triggering, u8 polarity, u8 shareable,
628 				     u8 wake_capable, bool check_override)
629 {
630 	int irq, p, t;
631 
632 	if (!valid_IRQ(gsi)) {
633 		irqresource_disabled(res, gsi);
634 		return;
635 	}
636 
637 	/*
638 	 * In IO-APIC mode, use overridden attribute. Two reasons:
639 	 * 1. BIOS bug in DSDT
640 	 * 2. BIOS uses IO-APIC mode Interrupt Source Override
641 	 *
642 	 * We do this only if we are dealing with IRQ() or IRQNoFlags()
643 	 * resource (the legacy ISA resources). With modern ACPI 5 devices
644 	 * using extended IRQ descriptors we take the IRQ configuration
645 	 * from _CRS directly.
646 	 */
647 	if (check_override &&
648 	    acpi_dev_irq_override(gsi, triggering, polarity, shareable) &&
649 	    !acpi_get_override_irq(gsi, &t, &p)) {
650 		u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
651 		u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
652 
653 		if (triggering != trig || polarity != pol) {
654 			pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi,
655 				t ? "level" : "edge",
656 				trig == triggering ? "" : "(!)",
657 				p ? "low" : "high",
658 				pol == polarity ? "" : "(!)");
659 			triggering = trig;
660 			polarity = pol;
661 		}
662 	}
663 
664 	res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
665 	irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
666 	if (irq >= 0) {
667 		res->start = irq;
668 		res->end = irq;
669 	} else {
670 		irqresource_disabled(res, gsi);
671 	}
672 }
673 
674 /**
675  * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
676  * @ares: Input ACPI resource object.
677  * @index: Index into the array of GSIs represented by the resource.
678  * @res: Output generic resource object.
679  *
680  * Check if the given ACPI resource object represents an interrupt resource
681  * and @index does not exceed the resource's interrupt count (true is returned
682  * in that case regardless of the results of the other checks)).  If that's the
683  * case, register the GSI corresponding to @index from the array of interrupts
684  * represented by the resource and populate the generic resource object pointed
685  * to by @res accordingly.  If the registration of the GSI is not successful,
686  * IORESOURCE_DISABLED will be set it that object's flags.
687  *
688  * Return:
689  * 1) false with res->flags setting to zero: not the expected resource type
690  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
691  * 3) true: valid assigned resource
692  */
acpi_dev_resource_interrupt(struct acpi_resource * ares,int index,struct resource * res)693 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
694 				 struct resource *res)
695 {
696 	struct acpi_resource_irq *irq;
697 	struct acpi_resource_extended_irq *ext_irq;
698 
699 	switch (ares->type) {
700 	case ACPI_RESOURCE_TYPE_IRQ:
701 		/*
702 		 * Per spec, only one interrupt per descriptor is allowed in
703 		 * _CRS, but some firmware violates this, so parse them all.
704 		 */
705 		irq = &ares->data.irq;
706 		if (index >= irq->interrupt_count) {
707 			irqresource_disabled(res, 0);
708 			return false;
709 		}
710 		acpi_dev_get_irqresource(res, irq->interrupts[index],
711 					 irq->triggering, irq->polarity,
712 					 irq->shareable, irq->wake_capable,
713 					 true);
714 		break;
715 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
716 		ext_irq = &ares->data.extended_irq;
717 		if (index >= ext_irq->interrupt_count) {
718 			irqresource_disabled(res, 0);
719 			return false;
720 		}
721 		if (is_gsi(ext_irq))
722 			acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
723 					 ext_irq->triggering, ext_irq->polarity,
724 					 ext_irq->shareable, ext_irq->wake_capable,
725 					 false);
726 		else
727 			irqresource_disabled(res, 0);
728 		break;
729 	default:
730 		res->flags = 0;
731 		return false;
732 	}
733 
734 	return true;
735 }
736 EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
737 
738 /**
739  * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
740  * @list: The head of the resource list to free.
741  */
acpi_dev_free_resource_list(struct list_head * list)742 void acpi_dev_free_resource_list(struct list_head *list)
743 {
744 	resource_list_free(list);
745 }
746 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
747 
748 struct res_proc_context {
749 	struct list_head *list;
750 	int (*preproc)(struct acpi_resource *, void *);
751 	void *preproc_data;
752 	int count;
753 	int error;
754 };
755 
acpi_dev_new_resource_entry(struct resource_win * win,struct res_proc_context * c)756 static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
757 					       struct res_proc_context *c)
758 {
759 	struct resource_entry *rentry;
760 
761 	rentry = resource_list_create_entry(NULL, 0);
762 	if (!rentry) {
763 		c->error = -ENOMEM;
764 		return AE_NO_MEMORY;
765 	}
766 	*rentry->res = win->res;
767 	rentry->offset = win->offset;
768 	resource_list_add_tail(rentry, c->list);
769 	c->count++;
770 	return AE_OK;
771 }
772 
acpi_dev_process_resource(struct acpi_resource * ares,void * context)773 static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
774 					     void *context)
775 {
776 	struct res_proc_context *c = context;
777 	struct resource_win win;
778 	struct resource *res = &win.res;
779 	int i;
780 
781 	if (c->preproc) {
782 		int ret;
783 
784 		ret = c->preproc(ares, c->preproc_data);
785 		if (ret < 0) {
786 			c->error = ret;
787 			return AE_ABORT_METHOD;
788 		} else if (ret > 0) {
789 			return AE_OK;
790 		}
791 	}
792 
793 	memset(&win, 0, sizeof(win));
794 
795 	if (acpi_dev_resource_memory(ares, res)
796 	    || acpi_dev_resource_io(ares, res)
797 	    || acpi_dev_resource_address_space(ares, &win)
798 	    || acpi_dev_resource_ext_address_space(ares, &win))
799 		return acpi_dev_new_resource_entry(&win, c);
800 
801 	for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
802 		acpi_status status;
803 
804 		status = acpi_dev_new_resource_entry(&win, c);
805 		if (ACPI_FAILURE(status))
806 			return status;
807 	}
808 
809 	return AE_OK;
810 }
811 
__acpi_dev_get_resources(struct acpi_device * adev,struct list_head * list,int (* preproc)(struct acpi_resource *,void *),void * preproc_data,char * method)812 static int __acpi_dev_get_resources(struct acpi_device *adev,
813 				    struct list_head *list,
814 				    int (*preproc)(struct acpi_resource *, void *),
815 				    void *preproc_data, char *method)
816 {
817 	struct res_proc_context c;
818 	acpi_status status;
819 
820 	if (!adev || !adev->handle || !list_empty(list))
821 		return -EINVAL;
822 
823 	if (!acpi_has_method(adev->handle, method))
824 		return 0;
825 
826 	c.list = list;
827 	c.preproc = preproc;
828 	c.preproc_data = preproc_data;
829 	c.count = 0;
830 	c.error = 0;
831 	status = acpi_walk_resources(adev->handle, method,
832 				     acpi_dev_process_resource, &c);
833 	if (ACPI_FAILURE(status)) {
834 		acpi_dev_free_resource_list(list);
835 		return c.error ? c.error : -EIO;
836 	}
837 
838 	return c.count;
839 }
840 
841 /**
842  * acpi_dev_get_resources - Get current resources of a device.
843  * @adev: ACPI device node to get the resources for.
844  * @list: Head of the resultant list of resources (must be empty).
845  * @preproc: The caller's preprocessing routine.
846  * @preproc_data: Pointer passed to the caller's preprocessing routine.
847  *
848  * Evaluate the _CRS method for the given device node and process its output by
849  * (1) executing the @preproc() routine provided by the caller, passing the
850  * resource pointer and @preproc_data to it as arguments, for each ACPI resource
851  * returned and (2) converting all of the returned ACPI resources into struct
852  * resource objects if possible.  If the return value of @preproc() in step (1)
853  * is different from 0, step (2) is not applied to the given ACPI resource and
854  * if that value is negative, the whole processing is aborted and that value is
855  * returned as the final error code.
856  *
857  * The resultant struct resource objects are put on the list pointed to by
858  * @list, that must be empty initially, as members of struct resource_entry
859  * objects.  Callers of this routine should use %acpi_dev_free_resource_list() to
860  * free that list.
861  *
862  * The number of resources in the output list is returned on success, an error
863  * code reflecting the error condition is returned otherwise.
864  */
acpi_dev_get_resources(struct acpi_device * adev,struct list_head * list,int (* preproc)(struct acpi_resource *,void *),void * preproc_data)865 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
866 			   int (*preproc)(struct acpi_resource *, void *),
867 			   void *preproc_data)
868 {
869 	return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
870 					METHOD_NAME__CRS);
871 }
872 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
873 
is_memory(struct acpi_resource * ares,void * not_used)874 static int is_memory(struct acpi_resource *ares, void *not_used)
875 {
876 	struct resource_win win;
877 	struct resource *res = &win.res;
878 
879 	memset(&win, 0, sizeof(win));
880 
881 	if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM))
882 		return 1;
883 
884 	return !(acpi_dev_resource_memory(ares, res)
885 	       || acpi_dev_resource_address_space(ares, &win)
886 	       || acpi_dev_resource_ext_address_space(ares, &win));
887 }
888 
889 /**
890  * acpi_dev_get_dma_resources - Get current DMA resources of a device.
891  * @adev: ACPI device node to get the resources for.
892  * @list: Head of the resultant list of resources (must be empty).
893  *
894  * Evaluate the _DMA method for the given device node and process its
895  * output.
896  *
897  * The resultant struct resource objects are put on the list pointed to
898  * by @list, that must be empty initially, as members of struct
899  * resource_entry objects.  Callers of this routine should use
900  * %acpi_dev_free_resource_list() to free that list.
901  *
902  * The number of resources in the output list is returned on success,
903  * an error code reflecting the error condition is returned otherwise.
904  */
acpi_dev_get_dma_resources(struct acpi_device * adev,struct list_head * list)905 int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
906 {
907 	return __acpi_dev_get_resources(adev, list, is_memory, NULL,
908 					METHOD_NAME__DMA);
909 }
910 EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
911 
912 /**
913  * acpi_dev_get_memory_resources - Get current memory resources of a device.
914  * @adev: ACPI device node to get the resources for.
915  * @list: Head of the resultant list of resources (must be empty).
916  *
917  * This is a helper function that locates all memory type resources of @adev
918  * with acpi_dev_get_resources().
919  *
920  * The number of resources in the output list is returned on success, an error
921  * code reflecting the error condition is returned otherwise.
922  */
acpi_dev_get_memory_resources(struct acpi_device * adev,struct list_head * list)923 int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
924 {
925 	return acpi_dev_get_resources(adev, list, is_memory, NULL);
926 }
927 EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
928 
929 /**
930  * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
931  *				   types
932  * @ares: Input ACPI resource object.
933  * @types: Valid resource types of IORESOURCE_XXX
934  *
935  * This is a helper function to support acpi_dev_get_resources(), which filters
936  * ACPI resource objects according to resource types.
937  */
acpi_dev_filter_resource_type(struct acpi_resource * ares,unsigned long types)938 int acpi_dev_filter_resource_type(struct acpi_resource *ares,
939 				  unsigned long types)
940 {
941 	unsigned long type = 0;
942 
943 	switch (ares->type) {
944 	case ACPI_RESOURCE_TYPE_MEMORY24:
945 	case ACPI_RESOURCE_TYPE_MEMORY32:
946 	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
947 		type = IORESOURCE_MEM;
948 		break;
949 	case ACPI_RESOURCE_TYPE_IO:
950 	case ACPI_RESOURCE_TYPE_FIXED_IO:
951 		type = IORESOURCE_IO;
952 		break;
953 	case ACPI_RESOURCE_TYPE_IRQ:
954 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
955 		type = IORESOURCE_IRQ;
956 		break;
957 	case ACPI_RESOURCE_TYPE_DMA:
958 	case ACPI_RESOURCE_TYPE_FIXED_DMA:
959 		type = IORESOURCE_DMA;
960 		break;
961 	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
962 		type = IORESOURCE_REG;
963 		break;
964 	case ACPI_RESOURCE_TYPE_ADDRESS16:
965 	case ACPI_RESOURCE_TYPE_ADDRESS32:
966 	case ACPI_RESOURCE_TYPE_ADDRESS64:
967 	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
968 		if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
969 			type = IORESOURCE_MEM;
970 		else if (ares->data.address.resource_type == ACPI_IO_RANGE)
971 			type = IORESOURCE_IO;
972 		else if (ares->data.address.resource_type ==
973 			 ACPI_BUS_NUMBER_RANGE)
974 			type = IORESOURCE_BUS;
975 		break;
976 	default:
977 		break;
978 	}
979 
980 	return (type & types) ? 0 : 1;
981 }
982 EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
983 
acpi_dev_consumes_res(struct acpi_device * adev,struct resource * res)984 static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
985 {
986 	struct list_head resource_list;
987 	struct resource_entry *rentry;
988 	int ret, found = 0;
989 
990 	INIT_LIST_HEAD(&resource_list);
991 	ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
992 	if (ret < 0)
993 		return 0;
994 
995 	list_for_each_entry(rentry, &resource_list, node) {
996 		if (resource_contains(rentry->res, res)) {
997 			found = 1;
998 			break;
999 		}
1000 
1001 	}
1002 
1003 	acpi_dev_free_resource_list(&resource_list);
1004 	return found;
1005 }
1006 
acpi_res_consumer_cb(acpi_handle handle,u32 depth,void * context,void ** ret)1007 static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
1008 					 void *context, void **ret)
1009 {
1010 	struct resource *res = context;
1011 	struct acpi_device **consumer = (struct acpi_device **) ret;
1012 	struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
1013 
1014 	if (!adev)
1015 		return AE_OK;
1016 
1017 	if (acpi_dev_consumes_res(adev, res)) {
1018 		*consumer = adev;
1019 		return AE_CTRL_TERMINATE;
1020 	}
1021 
1022 	return AE_OK;
1023 }
1024 
1025 /**
1026  * acpi_resource_consumer - Find the ACPI device that consumes @res.
1027  * @res: Resource to search for.
1028  *
1029  * Search the current resource settings (_CRS) of every ACPI device node
1030  * for @res.  If we find an ACPI device whose _CRS includes @res, return
1031  * it.  Otherwise, return NULL.
1032  */
acpi_resource_consumer(struct resource * res)1033 struct acpi_device *acpi_resource_consumer(struct resource *res)
1034 {
1035 	struct acpi_device *consumer = NULL;
1036 
1037 	acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);
1038 	return consumer;
1039 }
1040