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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
046d9ce6 RW |
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 | * | |
046d9ce6 RW |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
11 | */ | |
12 | ||
13 | #include <linux/acpi.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/export.h> | |
16 | #include <linux/ioport.h> | |
8e345c99 | 17 | #include <linux/slab.h> |
55a93417 | 18 | #include <linux/irq.h> |
892a0126 | 19 | #include <linux/dmi.h> |
046d9ce6 RW |
20 | |
21 | #ifdef CONFIG_X86 | |
22 | #define valid_IRQ(i) (((i) != 0) && ((i) != 2)) | |
4a2e7aab LP |
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 | } | |
046d9ce6 RW |
28 | #else |
29 | #define valid_IRQ(i) (true) | |
4a2e7aab LP |
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 | |
36 | acpi_iospace_resource_valid(struct resource *res) { return true; } | |
046d9ce6 RW |
37 | #endif |
38 | ||
fa20b176 AVF |
39 | #if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI) |
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 | |
46 | static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq) | |
47 | { | |
48 | return true; | |
49 | } | |
50 | #endif | |
51 | ||
c420dbd1 | 52 | static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io) |
046d9ce6 | 53 | { |
c420dbd1 | 54 | u64 reslen = end - start + 1; |
046d9ce6 | 55 | |
c420dbd1 TG |
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. | |
aa714d28 JL |
60 | * Note: some BIOSes report incorrect length for ACPI address space |
61 | * descriptor, so remove check of 'reslen == len' to avoid regression. | |
c420dbd1 | 62 | */ |
aa714d28 | 63 | if (len && reslen && start <= end) |
c420dbd1 TG |
64 | return true; |
65 | ||
6a239af2 | 66 | pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n", |
c420dbd1 TG |
67 | io ? "io" : "mem", start, end, len); |
68 | ||
69 | return false; | |
70 | } | |
71 | ||
72 | static void acpi_dev_memresource_flags(struct resource *res, u64 len, | |
72e26b0d | 73 | u8 write_protect) |
c420dbd1 TG |
74 | { |
75 | res->flags = IORESOURCE_MEM; | |
76 | ||
77 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, false)) | |
c78b6885 | 78 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 RW |
79 | |
80 | if (write_protect == ACPI_READ_WRITE_MEMORY) | |
c420dbd1 | 81 | res->flags |= IORESOURCE_MEM_WRITEABLE; |
046d9ce6 RW |
82 | } |
83 | ||
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; | |
72e26b0d | 89 | acpi_dev_memresource_flags(res, len, write_protect); |
046d9ce6 RW |
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. | |
581c19f3 JL |
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 | |
046d9ce6 RW |
105 | */ |
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; | |
8515f936 JL |
115 | acpi_dev_get_memresource(res, memory24->minimum << 8, |
116 | memory24->address_length << 8, | |
046d9ce6 RW |
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: | |
581c19f3 | 132 | res->flags = 0; |
046d9ce6 RW |
133 | return false; |
134 | } | |
c420dbd1 TG |
135 | |
136 | return !(res->flags & IORESOURCE_DISABLED); | |
046d9ce6 RW |
137 | } |
138 | EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); | |
139 | ||
1d0420f1 | 140 | static void acpi_dev_ioresource_flags(struct resource *res, u64 len, |
91236ecc | 141 | u8 io_decode, u8 translation_type) |
046d9ce6 | 142 | { |
1d0420f1 | 143 | res->flags = IORESOURCE_IO; |
046d9ce6 | 144 | |
1d0420f1 | 145 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, true)) |
c78b6885 | 146 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
1d0420f1 | 147 | |
4a2e7aab | 148 | if (!acpi_iospace_resource_valid(res)) |
c78b6885 | 149 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 | 150 | |
1d0420f1 TG |
151 | if (io_decode == ACPI_DECODE_16) |
152 | res->flags |= IORESOURCE_IO_16BIT_ADDR; | |
91236ecc JL |
153 | if (translation_type == ACPI_SPARSE_TRANSLATION) |
154 | res->flags |= IORESOURCE_IO_SPARSE; | |
046d9ce6 RW |
155 | } |
156 | ||
157 | static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, | |
158 | u8 io_decode) | |
159 | { | |
046d9ce6 | 160 | res->start = start; |
1d0420f1 | 161 | res->end = start + len - 1; |
91236ecc | 162 | acpi_dev_ioresource_flags(res, len, io_decode, 0); |
046d9ce6 RW |
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. | |
581c19f3 JL |
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 | |
046d9ce6 RW |
178 | */ |
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: | |
581c19f3 | 198 | res->flags = 0; |
046d9ce6 RW |
199 | return false; |
200 | } | |
1d0420f1 TG |
201 | |
202 | return !(res->flags & IORESOURCE_DISABLED); | |
046d9ce6 RW |
203 | } |
204 | EXPORT_SYMBOL_GPL(acpi_dev_resource_io); | |
205 | ||
a49170b5 | 206 | static bool acpi_decode_space(struct resource_win *win, |
eb76d55e TG |
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; | |
eb76d55e TG |
211 | bool wp = addr->info.mem.write_protect; |
212 | u64 len = attr->address_length; | |
1fb01ca9 | 213 | u64 start, end, offset = 0; |
a49170b5 | 214 | struct resource *res = &win->res; |
eb76d55e | 215 | |
a274019f JL |
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 | ||
2ea3d266 JL |
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 | */ | |
1fb01ca9 JL |
232 | if (addr->producer_consumer == ACPI_PRODUCER) |
233 | offset = attr->translation_offset; | |
234 | else if (attr->translation_offset) | |
2ea3d266 JL |
235 | pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n", |
236 | attr->translation_offset); | |
1fb01ca9 JL |
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; | |
2ea3d266 JL |
248 | } |
249 | ||
eb76d55e TG |
250 | switch (addr->resource_type) { |
251 | case ACPI_MEMORY_RANGE: | |
72e26b0d | 252 | acpi_dev_memresource_flags(res, len, wp); |
eb76d55e TG |
253 | break; |
254 | case ACPI_IO_RANGE: | |
91236ecc JL |
255 | acpi_dev_ioresource_flags(res, len, iodec, |
256 | addr->info.io.translation_type); | |
eb76d55e TG |
257 | break; |
258 | case ACPI_BUS_NUMBER_RANGE: | |
259 | res->flags = IORESOURCE_BUS; | |
260 | break; | |
261 | default: | |
262 | return false; | |
263 | } | |
264 | ||
72e26b0d TG |
265 | if (addr->producer_consumer == ACPI_PRODUCER) |
266 | res->flags |= IORESOURCE_WINDOW; | |
fcb29bbc TG |
267 | |
268 | if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY) | |
269 | res->flags |= IORESOURCE_PREFETCH; | |
72e26b0d | 270 | |
eb76d55e TG |
271 | return !(res->flags & IORESOURCE_DISABLED); |
272 | } | |
273 | ||
046d9ce6 RW |
274 | /** |
275 | * acpi_dev_resource_address_space - Extract ACPI address space information. | |
276 | * @ares: Input ACPI resource object. | |
a49170b5 | 277 | * @win: Output generic resource object. |
046d9ce6 RW |
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 | |
a49170b5 | 281 | * resource object pointed to by @win. |
581c19f3 JL |
282 | * |
283 | * Return: | |
a49170b5 JL |
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 | |
581c19f3 | 287 | * 3) true: valid assigned resource |
046d9ce6 RW |
288 | */ |
289 | bool acpi_dev_resource_address_space(struct acpi_resource *ares, | |
a49170b5 | 290 | struct resource_win *win) |
046d9ce6 | 291 | { |
046d9ce6 | 292 | struct acpi_resource_address64 addr; |
046d9ce6 | 293 | |
a49170b5 | 294 | win->res.flags = 0; |
eb76d55e | 295 | if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr))) |
6658c739 | 296 | return false; |
046d9ce6 | 297 | |
a49170b5 | 298 | return acpi_decode_space(win, (struct acpi_resource_address *)&addr, |
eb76d55e | 299 | &addr.address); |
046d9ce6 RW |
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. | |
a49170b5 | 306 | * @win: Output generic resource object. |
046d9ce6 RW |
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 | |
a49170b5 | 310 | * generic resource object pointed to by @win. |
581c19f3 JL |
311 | * |
312 | * Return: | |
a49170b5 JL |
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 | |
581c19f3 | 316 | * 3) true: valid assigned resource |
046d9ce6 RW |
317 | */ |
318 | bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, | |
a49170b5 | 319 | struct resource_win *win) |
046d9ce6 RW |
320 | { |
321 | struct acpi_resource_extended_address64 *ext_addr; | |
046d9ce6 | 322 | |
a49170b5 | 323 | win->res.flags = 0; |
046d9ce6 RW |
324 | if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) |
325 | return false; | |
326 | ||
327 | ext_addr = &ares->data.ext_address64; | |
328 | ||
a49170b5 | 329 | return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr, |
eb76d55e | 330 | &ext_addr->address); |
046d9ce6 RW |
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 | */ | |
340 | unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable) | |
341 | { | |
342 | unsigned long flags; | |
343 | ||
344 | if (triggering == ACPI_LEVEL_SENSITIVE) | |
345 | flags = polarity == ACPI_ACTIVE_LOW ? | |
346 | IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL; | |
347 | else | |
348 | flags = polarity == ACPI_ACTIVE_LOW ? | |
349 | IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE; | |
350 | ||
351 | if (shareable == ACPI_SHARED) | |
352 | flags |= IORESOURCE_IRQ_SHAREABLE; | |
353 | ||
354 | return flags | IORESOURCE_IRQ; | |
355 | } | |
356 | EXPORT_SYMBOL_GPL(acpi_dev_irq_flags); | |
357 | ||
55a93417 CR |
358 | /** |
359 | * acpi_dev_get_irq_type - Determine irq type. | |
360 | * @triggering: Triggering type as provided by ACPI. | |
361 | * @polarity: Interrupt polarity as provided by ACPI. | |
362 | */ | |
363 | unsigned int acpi_dev_get_irq_type(int triggering, int polarity) | |
364 | { | |
365 | switch (polarity) { | |
366 | case ACPI_ACTIVE_LOW: | |
367 | return triggering == ACPI_EDGE_SENSITIVE ? | |
368 | IRQ_TYPE_EDGE_FALLING : | |
369 | IRQ_TYPE_LEVEL_LOW; | |
370 | case ACPI_ACTIVE_HIGH: | |
371 | return triggering == ACPI_EDGE_SENSITIVE ? | |
372 | IRQ_TYPE_EDGE_RISING : | |
373 | IRQ_TYPE_LEVEL_HIGH; | |
374 | case ACPI_ACTIVE_BOTH: | |
375 | if (triggering == ACPI_EDGE_SENSITIVE) | |
376 | return IRQ_TYPE_EDGE_BOTH; | |
57d2dd4b | 377 | fallthrough; |
55a93417 CR |
378 | default: |
379 | return IRQ_TYPE_NONE; | |
380 | } | |
381 | } | |
382 | EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type); | |
383 | ||
892a0126 HW |
384 | static const struct dmi_system_id medion_laptop[] = { |
385 | { | |
386 | .ident = "MEDION P15651", | |
387 | .matches = { | |
388 | DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), | |
389 | DMI_MATCH(DMI_BOARD_NAME, "M15T"), | |
390 | }, | |
391 | }, | |
1b26ae40 HW |
392 | { |
393 | .ident = "MEDION S17405", | |
394 | .matches = { | |
395 | DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), | |
396 | DMI_MATCH(DMI_BOARD_NAME, "M17T"), | |
397 | }, | |
398 | }, | |
892a0126 HW |
399 | { } |
400 | }; | |
401 | ||
e12dee37 TK |
402 | static const struct dmi_system_id asus_laptop[] = { |
403 | { | |
404 | .ident = "Asus Vivobook K3402ZA", | |
405 | .matches = { | |
406 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
407 | DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"), | |
408 | }, | |
409 | }, | |
410 | { | |
411 | .ident = "Asus Vivobook K3502ZA", | |
412 | .matches = { | |
413 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
414 | DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"), | |
415 | }, | |
416 | }, | |
417 | { } | |
418 | }; | |
419 | ||
892a0126 HW |
420 | struct irq_override_cmp { |
421 | const struct dmi_system_id *system; | |
422 | unsigned char irq; | |
423 | unsigned char triggering; | |
424 | unsigned char polarity; | |
425 | unsigned char shareable; | |
426 | }; | |
427 | ||
428 | static const struct irq_override_cmp skip_override_table[] = { | |
429 | { medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0 }, | |
e12dee37 | 430 | { asus_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0 }, |
892a0126 HW |
431 | }; |
432 | ||
433 | static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity, | |
434 | u8 shareable) | |
435 | { | |
436 | int i; | |
437 | ||
9946e39f CG |
438 | #ifdef CONFIG_X86 |
439 | /* | |
440 | * IRQ override isn't needed on modern AMD Zen systems and | |
441 | * this override breaks active low IRQs on AMD Ryzen 6000 and | |
442 | * newer systems. Skip it. | |
443 | */ | |
444 | if (boot_cpu_has(X86_FEATURE_ZEN)) | |
445 | return false; | |
446 | #endif | |
447 | ||
892a0126 HW |
448 | for (i = 0; i < ARRAY_SIZE(skip_override_table); i++) { |
449 | const struct irq_override_cmp *entry = &skip_override_table[i]; | |
450 | ||
451 | if (dmi_check_system(entry->system) && | |
452 | entry->irq == gsi && | |
453 | entry->triggering == triggering && | |
454 | entry->polarity == polarity && | |
455 | entry->shareable == shareable) | |
456 | return false; | |
457 | } | |
458 | ||
459 | return true; | |
460 | } | |
461 | ||
046d9ce6 | 462 | static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, |
204ebc0a | 463 | u8 triggering, u8 polarity, u8 shareable, |
892a0126 | 464 | bool check_override) |
046d9ce6 RW |
465 | { |
466 | int irq, p, t; | |
467 | ||
468 | if (!valid_IRQ(gsi)) { | |
1c3f69b4 | 469 | irqresource_disabled(res, gsi); |
046d9ce6 RW |
470 | return; |
471 | } | |
472 | ||
473 | /* | |
03671057 | 474 | * In IO-APIC mode, use overridden attribute. Two reasons: |
046d9ce6 RW |
475 | * 1. BIOS bug in DSDT |
476 | * 2. BIOS uses IO-APIC mode Interrupt Source Override | |
204ebc0a MW |
477 | * |
478 | * We do this only if we are dealing with IRQ() or IRQNoFlags() | |
479 | * resource (the legacy ISA resources). With modern ACPI 5 devices | |
480 | * using extended IRQ descriptors we take the IRQ configuration | |
481 | * from _CRS directly. | |
046d9ce6 | 482 | */ |
892a0126 HW |
483 | if (check_override && |
484 | acpi_dev_irq_override(gsi, triggering, polarity, shareable) && | |
485 | !acpi_get_override_irq(gsi, &t, &p)) { | |
046d9ce6 RW |
486 | u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; |
487 | u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; | |
488 | ||
489 | if (triggering != trig || polarity != pol) { | |
933ca4e3 KW |
490 | pr_warn("ACPI: IRQ %d override to %s, %s\n", gsi, |
491 | t ? "level" : "edge", p ? "low" : "high"); | |
046d9ce6 RW |
492 | triggering = trig; |
493 | polarity = pol; | |
494 | } | |
495 | } | |
496 | ||
497 | res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); | |
498 | irq = acpi_register_gsi(NULL, gsi, triggering, polarity); | |
499 | if (irq >= 0) { | |
500 | res->start = irq; | |
501 | res->end = irq; | |
502 | } else { | |
1c3f69b4 | 503 | irqresource_disabled(res, gsi); |
046d9ce6 RW |
504 | } |
505 | } | |
506 | ||
507 | /** | |
508 | * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. | |
509 | * @ares: Input ACPI resource object. | |
510 | * @index: Index into the array of GSIs represented by the resource. | |
511 | * @res: Output generic resource object. | |
512 | * | |
513 | * Check if the given ACPI resource object represents an interrupt resource | |
514 | * and @index does not exceed the resource's interrupt count (true is returned | |
515 | * in that case regardless of the results of the other checks)). If that's the | |
516 | * case, register the GSI corresponding to @index from the array of interrupts | |
517 | * represented by the resource and populate the generic resource object pointed | |
518 | * to by @res accordingly. If the registration of the GSI is not successful, | |
519 | * IORESOURCE_DISABLED will be set it that object's flags. | |
581c19f3 JL |
520 | * |
521 | * Return: | |
522 | * 1) false with res->flags setting to zero: not the expected resource type | |
523 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
524 | * 3) true: valid assigned resource | |
046d9ce6 RW |
525 | */ |
526 | bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, | |
527 | struct resource *res) | |
528 | { | |
529 | struct acpi_resource_irq *irq; | |
530 | struct acpi_resource_extended_irq *ext_irq; | |
531 | ||
532 | switch (ares->type) { | |
533 | case ACPI_RESOURCE_TYPE_IRQ: | |
534 | /* | |
535 | * Per spec, only one interrupt per descriptor is allowed in | |
536 | * _CRS, but some firmware violates this, so parse them all. | |
537 | */ | |
538 | irq = &ares->data.irq; | |
539 | if (index >= irq->interrupt_count) { | |
1c3f69b4 | 540 | irqresource_disabled(res, 0); |
046d9ce6 RW |
541 | return false; |
542 | } | |
543 | acpi_dev_get_irqresource(res, irq->interrupts[index], | |
544 | irq->triggering, irq->polarity, | |
e0eef369 | 545 | irq->shareable, true); |
046d9ce6 RW |
546 | break; |
547 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
548 | ext_irq = &ares->data.extended_irq; | |
549 | if (index >= ext_irq->interrupt_count) { | |
1c3f69b4 | 550 | irqresource_disabled(res, 0); |
046d9ce6 RW |
551 | return false; |
552 | } | |
fa20b176 AVF |
553 | if (is_gsi(ext_irq)) |
554 | acpi_dev_get_irqresource(res, ext_irq->interrupts[index], | |
046d9ce6 | 555 | ext_irq->triggering, ext_irq->polarity, |
c163f90c | 556 | ext_irq->shareable, false); |
fa20b176 | 557 | else |
1c3f69b4 | 558 | irqresource_disabled(res, 0); |
046d9ce6 RW |
559 | break; |
560 | default: | |
581c19f3 | 561 | res->flags = 0; |
046d9ce6 RW |
562 | return false; |
563 | } | |
564 | ||
565 | return true; | |
566 | } | |
567 | EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); | |
8e345c99 RW |
568 | |
569 | /** | |
570 | * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). | |
571 | * @list: The head of the resource list to free. | |
572 | */ | |
573 | void acpi_dev_free_resource_list(struct list_head *list) | |
574 | { | |
90e97820 | 575 | resource_list_free(list); |
8e345c99 RW |
576 | } |
577 | EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); | |
578 | ||
579 | struct res_proc_context { | |
580 | struct list_head *list; | |
581 | int (*preproc)(struct acpi_resource *, void *); | |
582 | void *preproc_data; | |
583 | int count; | |
584 | int error; | |
585 | }; | |
586 | ||
a49170b5 | 587 | static acpi_status acpi_dev_new_resource_entry(struct resource_win *win, |
8e345c99 RW |
588 | struct res_proc_context *c) |
589 | { | |
90e97820 | 590 | struct resource_entry *rentry; |
8e345c99 | 591 | |
90e97820 | 592 | rentry = resource_list_create_entry(NULL, 0); |
8e345c99 RW |
593 | if (!rentry) { |
594 | c->error = -ENOMEM; | |
595 | return AE_NO_MEMORY; | |
596 | } | |
90e97820 | 597 | *rentry->res = win->res; |
93286f47 | 598 | rentry->offset = win->offset; |
90e97820 | 599 | resource_list_add_tail(rentry, c->list); |
8e345c99 RW |
600 | c->count++; |
601 | return AE_OK; | |
602 | } | |
603 | ||
604 | static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, | |
605 | void *context) | |
606 | { | |
607 | struct res_proc_context *c = context; | |
a49170b5 JL |
608 | struct resource_win win; |
609 | struct resource *res = &win.res; | |
8e345c99 RW |
610 | int i; |
611 | ||
612 | if (c->preproc) { | |
613 | int ret; | |
614 | ||
615 | ret = c->preproc(ares, c->preproc_data); | |
616 | if (ret < 0) { | |
617 | c->error = ret; | |
12fc4dad | 618 | return AE_ABORT_METHOD; |
8e345c99 RW |
619 | } else if (ret > 0) { |
620 | return AE_OK; | |
621 | } | |
622 | } | |
623 | ||
a49170b5 | 624 | memset(&win, 0, sizeof(win)); |
8e345c99 | 625 | |
a49170b5 JL |
626 | if (acpi_dev_resource_memory(ares, res) |
627 | || acpi_dev_resource_io(ares, res) | |
628 | || acpi_dev_resource_address_space(ares, &win) | |
629 | || acpi_dev_resource_ext_address_space(ares, &win)) | |
630 | return acpi_dev_new_resource_entry(&win, c); | |
8e345c99 | 631 | |
a49170b5 | 632 | for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) { |
8e345c99 RW |
633 | acpi_status status; |
634 | ||
a49170b5 | 635 | status = acpi_dev_new_resource_entry(&win, c); |
8e345c99 RW |
636 | if (ACPI_FAILURE(status)) |
637 | return status; | |
638 | } | |
639 | ||
640 | return AE_OK; | |
641 | } | |
642 | ||
4f0450af LP |
643 | static int __acpi_dev_get_resources(struct acpi_device *adev, |
644 | struct list_head *list, | |
645 | int (*preproc)(struct acpi_resource *, void *), | |
646 | void *preproc_data, char *method) | |
647 | { | |
648 | struct res_proc_context c; | |
649 | acpi_status status; | |
650 | ||
651 | if (!adev || !adev->handle || !list_empty(list)) | |
652 | return -EINVAL; | |
653 | ||
654 | if (!acpi_has_method(adev->handle, method)) | |
655 | return 0; | |
656 | ||
657 | c.list = list; | |
658 | c.preproc = preproc; | |
659 | c.preproc_data = preproc_data; | |
660 | c.count = 0; | |
661 | c.error = 0; | |
662 | status = acpi_walk_resources(adev->handle, method, | |
663 | acpi_dev_process_resource, &c); | |
664 | if (ACPI_FAILURE(status)) { | |
665 | acpi_dev_free_resource_list(list); | |
666 | return c.error ? c.error : -EIO; | |
667 | } | |
668 | ||
669 | return c.count; | |
670 | } | |
671 | ||
8e345c99 RW |
672 | /** |
673 | * acpi_dev_get_resources - Get current resources of a device. | |
674 | * @adev: ACPI device node to get the resources for. | |
675 | * @list: Head of the resultant list of resources (must be empty). | |
676 | * @preproc: The caller's preprocessing routine. | |
677 | * @preproc_data: Pointer passed to the caller's preprocessing routine. | |
678 | * | |
679 | * Evaluate the _CRS method for the given device node and process its output by | |
935ab850 | 680 | * (1) executing the @preproc() routine provided by the caller, passing the |
8e345c99 RW |
681 | * resource pointer and @preproc_data to it as arguments, for each ACPI resource |
682 | * returned and (2) converting all of the returned ACPI resources into struct | |
683 | * resource objects if possible. If the return value of @preproc() in step (1) | |
684 | * is different from 0, step (2) is not applied to the given ACPI resource and | |
685 | * if that value is negative, the whole processing is aborted and that value is | |
686 | * returned as the final error code. | |
687 | * | |
688 | * The resultant struct resource objects are put on the list pointed to by | |
90e97820 | 689 | * @list, that must be empty initially, as members of struct resource_entry |
8e345c99 RW |
690 | * objects. Callers of this routine should use %acpi_dev_free_resource_list() to |
691 | * free that list. | |
692 | * | |
693 | * The number of resources in the output list is returned on success, an error | |
694 | * code reflecting the error condition is returned otherwise. | |
695 | */ | |
696 | int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, | |
697 | int (*preproc)(struct acpi_resource *, void *), | |
698 | void *preproc_data) | |
699 | { | |
4f0450af LP |
700 | return __acpi_dev_get_resources(adev, list, preproc, preproc_data, |
701 | METHOD_NAME__CRS); | |
8e345c99 RW |
702 | } |
703 | EXPORT_SYMBOL_GPL(acpi_dev_get_resources); | |
62d1141f | 704 | |
c04ac679 LP |
705 | static int is_memory(struct acpi_resource *ares, void *not_used) |
706 | { | |
707 | struct resource_win win; | |
708 | struct resource *res = &win.res; | |
709 | ||
710 | memset(&win, 0, sizeof(win)); | |
711 | ||
6d2b5a1c HK |
712 | if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM)) |
713 | return 1; | |
714 | ||
c04ac679 LP |
715 | return !(acpi_dev_resource_memory(ares, res) |
716 | || acpi_dev_resource_address_space(ares, &win) | |
717 | || acpi_dev_resource_ext_address_space(ares, &win)); | |
718 | } | |
719 | ||
720 | /** | |
721 | * acpi_dev_get_dma_resources - Get current DMA resources of a device. | |
722 | * @adev: ACPI device node to get the resources for. | |
723 | * @list: Head of the resultant list of resources (must be empty). | |
724 | * | |
725 | * Evaluate the _DMA method for the given device node and process its | |
726 | * output. | |
727 | * | |
728 | * The resultant struct resource objects are put on the list pointed to | |
729 | * by @list, that must be empty initially, as members of struct | |
730 | * resource_entry objects. Callers of this routine should use | |
731 | * %acpi_dev_free_resource_list() to free that list. | |
732 | * | |
733 | * The number of resources in the output list is returned on success, | |
734 | * an error code reflecting the error condition is returned otherwise. | |
735 | */ | |
736 | int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list) | |
737 | { | |
738 | return __acpi_dev_get_resources(adev, list, is_memory, NULL, | |
739 | METHOD_NAME__DMA); | |
740 | } | |
741 | EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources); | |
742 | ||
6bb057bf HK |
743 | /** |
744 | * acpi_dev_get_memory_resources - Get current memory resources of a device. | |
745 | * @adev: ACPI device node to get the resources for. | |
746 | * @list: Head of the resultant list of resources (must be empty). | |
747 | * | |
748 | * This is a helper function that locates all memory type resources of @adev | |
749 | * with acpi_dev_get_resources(). | |
750 | * | |
751 | * The number of resources in the output list is returned on success, an error | |
752 | * code reflecting the error condition is returned otherwise. | |
753 | */ | |
754 | int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list) | |
755 | { | |
756 | return acpi_dev_get_resources(adev, list, is_memory, NULL); | |
757 | } | |
758 | EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources); | |
759 | ||
62d1141f JL |
760 | /** |
761 | * acpi_dev_filter_resource_type - Filter ACPI resource according to resource | |
762 | * types | |
763 | * @ares: Input ACPI resource object. | |
764 | * @types: Valid resource types of IORESOURCE_XXX | |
765 | * | |
2c62e849 | 766 | * This is a helper function to support acpi_dev_get_resources(), which filters |
62d1141f JL |
767 | * ACPI resource objects according to resource types. |
768 | */ | |
769 | int acpi_dev_filter_resource_type(struct acpi_resource *ares, | |
770 | unsigned long types) | |
771 | { | |
772 | unsigned long type = 0; | |
773 | ||
774 | switch (ares->type) { | |
775 | case ACPI_RESOURCE_TYPE_MEMORY24: | |
776 | case ACPI_RESOURCE_TYPE_MEMORY32: | |
777 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: | |
778 | type = IORESOURCE_MEM; | |
779 | break; | |
780 | case ACPI_RESOURCE_TYPE_IO: | |
781 | case ACPI_RESOURCE_TYPE_FIXED_IO: | |
782 | type = IORESOURCE_IO; | |
783 | break; | |
784 | case ACPI_RESOURCE_TYPE_IRQ: | |
785 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
786 | type = IORESOURCE_IRQ; | |
787 | break; | |
788 | case ACPI_RESOURCE_TYPE_DMA: | |
789 | case ACPI_RESOURCE_TYPE_FIXED_DMA: | |
790 | type = IORESOURCE_DMA; | |
791 | break; | |
792 | case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: | |
793 | type = IORESOURCE_REG; | |
794 | break; | |
795 | case ACPI_RESOURCE_TYPE_ADDRESS16: | |
796 | case ACPI_RESOURCE_TYPE_ADDRESS32: | |
797 | case ACPI_RESOURCE_TYPE_ADDRESS64: | |
798 | case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: | |
799 | if (ares->data.address.resource_type == ACPI_MEMORY_RANGE) | |
800 | type = IORESOURCE_MEM; | |
801 | else if (ares->data.address.resource_type == ACPI_IO_RANGE) | |
802 | type = IORESOURCE_IO; | |
803 | else if (ares->data.address.resource_type == | |
804 | ACPI_BUS_NUMBER_RANGE) | |
805 | type = IORESOURCE_BUS; | |
806 | break; | |
807 | default: | |
808 | break; | |
809 | } | |
810 | ||
811 | return (type & types) ? 0 : 1; | |
812 | } | |
813 | EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type); | |
00710984 BH |
814 | |
815 | static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res) | |
816 | { | |
817 | struct list_head resource_list; | |
818 | struct resource_entry *rentry; | |
819 | int ret, found = 0; | |
820 | ||
821 | INIT_LIST_HEAD(&resource_list); | |
822 | ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL); | |
823 | if (ret < 0) | |
824 | return 0; | |
825 | ||
826 | list_for_each_entry(rentry, &resource_list, node) { | |
827 | if (resource_contains(rentry->res, res)) { | |
828 | found = 1; | |
829 | break; | |
830 | } | |
831 | ||
832 | } | |
833 | ||
834 | acpi_dev_free_resource_list(&resource_list); | |
835 | return found; | |
836 | } | |
837 | ||
838 | static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth, | |
839 | void *context, void **ret) | |
840 | { | |
841 | struct resource *res = context; | |
842 | struct acpi_device **consumer = (struct acpi_device **) ret; | |
99ece713 | 843 | struct acpi_device *adev = acpi_fetch_acpi_dev(handle); |
00710984 | 844 | |
99ece713 | 845 | if (!adev) |
00710984 BH |
846 | return AE_OK; |
847 | ||
848 | if (acpi_dev_consumes_res(adev, res)) { | |
849 | *consumer = adev; | |
850 | return AE_CTRL_TERMINATE; | |
851 | } | |
852 | ||
853 | return AE_OK; | |
854 | } | |
855 | ||
856 | /** | |
857 | * acpi_resource_consumer - Find the ACPI device that consumes @res. | |
858 | * @res: Resource to search for. | |
859 | * | |
860 | * Search the current resource settings (_CRS) of every ACPI device node | |
861 | * for @res. If we find an ACPI device whose _CRS includes @res, return | |
862 | * it. Otherwise, return NULL. | |
863 | */ | |
864 | struct acpi_device *acpi_resource_consumer(struct resource *res) | |
865 | { | |
866 | struct acpi_device *consumer = NULL; | |
867 | ||
868 | acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer); | |
869 | return consumer; | |
870 | } |