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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> |
046d9ce6 RW |
19 | |
20 | #ifdef CONFIG_X86 | |
21 | #define valid_IRQ(i) (((i) != 0) && ((i) != 2)) | |
4a2e7aab LP |
22 | static inline bool acpi_iospace_resource_valid(struct resource *res) |
23 | { | |
24 | /* On X86 IO space is limited to the [0 - 64K] IO port range */ | |
25 | return res->end < 0x10003; | |
26 | } | |
046d9ce6 RW |
27 | #else |
28 | #define valid_IRQ(i) (true) | |
4a2e7aab LP |
29 | /* |
30 | * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical | |
31 | * addresses mapping IO space in CPU physical address space, IO space | |
32 | * resources can be placed anywhere in the 64-bit physical address space. | |
33 | */ | |
34 | static inline bool | |
35 | acpi_iospace_resource_valid(struct resource *res) { return true; } | |
046d9ce6 RW |
36 | #endif |
37 | ||
fa20b176 AVF |
38 | #if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI) |
39 | static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq) | |
40 | { | |
41 | return ext_irq->resource_source.string_length == 0 && | |
42 | ext_irq->producer_consumer == ACPI_CONSUMER; | |
43 | } | |
44 | #else | |
45 | static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq) | |
46 | { | |
47 | return true; | |
48 | } | |
49 | #endif | |
50 | ||
c420dbd1 | 51 | static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io) |
046d9ce6 | 52 | { |
c420dbd1 | 53 | u64 reslen = end - start + 1; |
046d9ce6 | 54 | |
c420dbd1 TG |
55 | /* |
56 | * CHECKME: len might be required to check versus a minimum | |
57 | * length as well. 1 for io is fine, but for memory it does | |
58 | * not make any sense at all. | |
aa714d28 JL |
59 | * Note: some BIOSes report incorrect length for ACPI address space |
60 | * descriptor, so remove check of 'reslen == len' to avoid regression. | |
c420dbd1 | 61 | */ |
aa714d28 | 62 | if (len && reslen && start <= end) |
c420dbd1 TG |
63 | return true; |
64 | ||
6a239af2 | 65 | pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n", |
c420dbd1 TG |
66 | io ? "io" : "mem", start, end, len); |
67 | ||
68 | return false; | |
69 | } | |
70 | ||
71 | static void acpi_dev_memresource_flags(struct resource *res, u64 len, | |
72e26b0d | 72 | u8 write_protect) |
c420dbd1 TG |
73 | { |
74 | res->flags = IORESOURCE_MEM; | |
75 | ||
76 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, false)) | |
c78b6885 | 77 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 RW |
78 | |
79 | if (write_protect == ACPI_READ_WRITE_MEMORY) | |
c420dbd1 | 80 | res->flags |= IORESOURCE_MEM_WRITEABLE; |
046d9ce6 RW |
81 | } |
82 | ||
83 | static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len, | |
84 | u8 write_protect) | |
85 | { | |
86 | res->start = start; | |
87 | res->end = start + len - 1; | |
72e26b0d | 88 | acpi_dev_memresource_flags(res, len, write_protect); |
046d9ce6 RW |
89 | } |
90 | ||
91 | /** | |
92 | * acpi_dev_resource_memory - Extract ACPI memory resource information. | |
93 | * @ares: Input ACPI resource object. | |
94 | * @res: Output generic resource object. | |
95 | * | |
96 | * Check if the given ACPI resource object represents a memory resource and | |
97 | * if that's the case, use the information in it to populate the generic | |
98 | * resource object pointed to by @res. | |
581c19f3 JL |
99 | * |
100 | * Return: | |
101 | * 1) false with res->flags setting to zero: not the expected resource type | |
102 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
103 | * 3) true: valid assigned resource | |
046d9ce6 RW |
104 | */ |
105 | bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res) | |
106 | { | |
107 | struct acpi_resource_memory24 *memory24; | |
108 | struct acpi_resource_memory32 *memory32; | |
109 | struct acpi_resource_fixed_memory32 *fixed_memory32; | |
110 | ||
111 | switch (ares->type) { | |
112 | case ACPI_RESOURCE_TYPE_MEMORY24: | |
113 | memory24 = &ares->data.memory24; | |
8515f936 JL |
114 | acpi_dev_get_memresource(res, memory24->minimum << 8, |
115 | memory24->address_length << 8, | |
046d9ce6 RW |
116 | memory24->write_protect); |
117 | break; | |
118 | case ACPI_RESOURCE_TYPE_MEMORY32: | |
119 | memory32 = &ares->data.memory32; | |
120 | acpi_dev_get_memresource(res, memory32->minimum, | |
121 | memory32->address_length, | |
122 | memory32->write_protect); | |
123 | break; | |
124 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: | |
125 | fixed_memory32 = &ares->data.fixed_memory32; | |
126 | acpi_dev_get_memresource(res, fixed_memory32->address, | |
127 | fixed_memory32->address_length, | |
128 | fixed_memory32->write_protect); | |
129 | break; | |
130 | default: | |
581c19f3 | 131 | res->flags = 0; |
046d9ce6 RW |
132 | return false; |
133 | } | |
c420dbd1 TG |
134 | |
135 | return !(res->flags & IORESOURCE_DISABLED); | |
046d9ce6 RW |
136 | } |
137 | EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); | |
138 | ||
1d0420f1 | 139 | static void acpi_dev_ioresource_flags(struct resource *res, u64 len, |
91236ecc | 140 | u8 io_decode, u8 translation_type) |
046d9ce6 | 141 | { |
1d0420f1 | 142 | res->flags = IORESOURCE_IO; |
046d9ce6 | 143 | |
1d0420f1 | 144 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, true)) |
c78b6885 | 145 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
1d0420f1 | 146 | |
4a2e7aab | 147 | if (!acpi_iospace_resource_valid(res)) |
c78b6885 | 148 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 | 149 | |
1d0420f1 TG |
150 | if (io_decode == ACPI_DECODE_16) |
151 | res->flags |= IORESOURCE_IO_16BIT_ADDR; | |
91236ecc JL |
152 | if (translation_type == ACPI_SPARSE_TRANSLATION) |
153 | res->flags |= IORESOURCE_IO_SPARSE; | |
046d9ce6 RW |
154 | } |
155 | ||
156 | static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, | |
157 | u8 io_decode) | |
158 | { | |
046d9ce6 | 159 | res->start = start; |
1d0420f1 | 160 | res->end = start + len - 1; |
91236ecc | 161 | acpi_dev_ioresource_flags(res, len, io_decode, 0); |
046d9ce6 RW |
162 | } |
163 | ||
164 | /** | |
165 | * acpi_dev_resource_io - Extract ACPI I/O resource information. | |
166 | * @ares: Input ACPI resource object. | |
167 | * @res: Output generic resource object. | |
168 | * | |
169 | * Check if the given ACPI resource object represents an I/O resource and | |
170 | * if that's the case, use the information in it to populate the generic | |
171 | * resource object pointed to by @res. | |
581c19f3 JL |
172 | * |
173 | * Return: | |
174 | * 1) false with res->flags setting to zero: not the expected resource type | |
175 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
176 | * 3) true: valid assigned resource | |
046d9ce6 RW |
177 | */ |
178 | bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res) | |
179 | { | |
180 | struct acpi_resource_io *io; | |
181 | struct acpi_resource_fixed_io *fixed_io; | |
182 | ||
183 | switch (ares->type) { | |
184 | case ACPI_RESOURCE_TYPE_IO: | |
185 | io = &ares->data.io; | |
186 | acpi_dev_get_ioresource(res, io->minimum, | |
187 | io->address_length, | |
188 | io->io_decode); | |
189 | break; | |
190 | case ACPI_RESOURCE_TYPE_FIXED_IO: | |
191 | fixed_io = &ares->data.fixed_io; | |
192 | acpi_dev_get_ioresource(res, fixed_io->address, | |
193 | fixed_io->address_length, | |
194 | ACPI_DECODE_10); | |
195 | break; | |
196 | default: | |
581c19f3 | 197 | res->flags = 0; |
046d9ce6 RW |
198 | return false; |
199 | } | |
1d0420f1 TG |
200 | |
201 | return !(res->flags & IORESOURCE_DISABLED); | |
046d9ce6 RW |
202 | } |
203 | EXPORT_SYMBOL_GPL(acpi_dev_resource_io); | |
204 | ||
a49170b5 | 205 | static bool acpi_decode_space(struct resource_win *win, |
eb76d55e TG |
206 | struct acpi_resource_address *addr, |
207 | struct acpi_address64_attribute *attr) | |
208 | { | |
209 | u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16; | |
eb76d55e TG |
210 | bool wp = addr->info.mem.write_protect; |
211 | u64 len = attr->address_length; | |
1fb01ca9 | 212 | u64 start, end, offset = 0; |
a49170b5 | 213 | struct resource *res = &win->res; |
eb76d55e | 214 | |
a274019f JL |
215 | /* |
216 | * Filter out invalid descriptor according to ACPI Spec 5.0, section | |
217 | * 6.4.3.5 Address Space Resource Descriptors. | |
218 | */ | |
219 | if ((addr->min_address_fixed != addr->max_address_fixed && len) || | |
220 | (addr->min_address_fixed && addr->max_address_fixed && !len)) | |
221 | pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n", | |
222 | addr->min_address_fixed, addr->max_address_fixed, len); | |
223 | ||
2ea3d266 JL |
224 | /* |
225 | * For bridges that translate addresses across the bridge, | |
226 | * translation_offset is the offset that must be added to the | |
227 | * address on the secondary side to obtain the address on the | |
228 | * primary side. Non-bridge devices must list 0 for all Address | |
229 | * Translation offset bits. | |
230 | */ | |
1fb01ca9 JL |
231 | if (addr->producer_consumer == ACPI_PRODUCER) |
232 | offset = attr->translation_offset; | |
233 | else if (attr->translation_offset) | |
2ea3d266 JL |
234 | pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n", |
235 | attr->translation_offset); | |
1fb01ca9 JL |
236 | start = attr->minimum + offset; |
237 | end = attr->maximum + offset; | |
238 | ||
239 | win->offset = offset; | |
240 | res->start = start; | |
241 | res->end = end; | |
242 | if (sizeof(resource_size_t) < sizeof(u64) && | |
243 | (offset != win->offset || start != res->start || end != res->end)) { | |
244 | pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n", | |
245 | attr->minimum, attr->maximum); | |
246 | return false; | |
2ea3d266 JL |
247 | } |
248 | ||
eb76d55e TG |
249 | switch (addr->resource_type) { |
250 | case ACPI_MEMORY_RANGE: | |
72e26b0d | 251 | acpi_dev_memresource_flags(res, len, wp); |
eb76d55e TG |
252 | break; |
253 | case ACPI_IO_RANGE: | |
91236ecc JL |
254 | acpi_dev_ioresource_flags(res, len, iodec, |
255 | addr->info.io.translation_type); | |
eb76d55e TG |
256 | break; |
257 | case ACPI_BUS_NUMBER_RANGE: | |
258 | res->flags = IORESOURCE_BUS; | |
259 | break; | |
260 | default: | |
261 | return false; | |
262 | } | |
263 | ||
72e26b0d TG |
264 | if (addr->producer_consumer == ACPI_PRODUCER) |
265 | res->flags |= IORESOURCE_WINDOW; | |
fcb29bbc TG |
266 | |
267 | if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY) | |
268 | res->flags |= IORESOURCE_PREFETCH; | |
72e26b0d | 269 | |
eb76d55e TG |
270 | return !(res->flags & IORESOURCE_DISABLED); |
271 | } | |
272 | ||
046d9ce6 RW |
273 | /** |
274 | * acpi_dev_resource_address_space - Extract ACPI address space information. | |
275 | * @ares: Input ACPI resource object. | |
a49170b5 | 276 | * @win: Output generic resource object. |
046d9ce6 RW |
277 | * |
278 | * Check if the given ACPI resource object represents an address space resource | |
279 | * and if that's the case, use the information in it to populate the generic | |
a49170b5 | 280 | * resource object pointed to by @win. |
581c19f3 JL |
281 | * |
282 | * Return: | |
a49170b5 JL |
283 | * 1) false with win->res.flags setting to zero: not the expected resource type |
284 | * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned | |
285 | * resource | |
581c19f3 | 286 | * 3) true: valid assigned resource |
046d9ce6 RW |
287 | */ |
288 | bool acpi_dev_resource_address_space(struct acpi_resource *ares, | |
a49170b5 | 289 | struct resource_win *win) |
046d9ce6 | 290 | { |
046d9ce6 | 291 | struct acpi_resource_address64 addr; |
046d9ce6 | 292 | |
a49170b5 | 293 | win->res.flags = 0; |
eb76d55e | 294 | if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr))) |
6658c739 | 295 | return false; |
046d9ce6 | 296 | |
a49170b5 | 297 | return acpi_decode_space(win, (struct acpi_resource_address *)&addr, |
eb76d55e | 298 | &addr.address); |
046d9ce6 RW |
299 | } |
300 | EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space); | |
301 | ||
302 | /** | |
303 | * acpi_dev_resource_ext_address_space - Extract ACPI address space information. | |
304 | * @ares: Input ACPI resource object. | |
a49170b5 | 305 | * @win: Output generic resource object. |
046d9ce6 RW |
306 | * |
307 | * Check if the given ACPI resource object represents an extended address space | |
308 | * resource and if that's the case, use the information in it to populate the | |
a49170b5 | 309 | * generic resource object pointed to by @win. |
581c19f3 JL |
310 | * |
311 | * Return: | |
a49170b5 JL |
312 | * 1) false with win->res.flags setting to zero: not the expected resource type |
313 | * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned | |
314 | * resource | |
581c19f3 | 315 | * 3) true: valid assigned resource |
046d9ce6 RW |
316 | */ |
317 | bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, | |
a49170b5 | 318 | struct resource_win *win) |
046d9ce6 RW |
319 | { |
320 | struct acpi_resource_extended_address64 *ext_addr; | |
046d9ce6 | 321 | |
a49170b5 | 322 | win->res.flags = 0; |
046d9ce6 RW |
323 | if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) |
324 | return false; | |
325 | ||
326 | ext_addr = &ares->data.ext_address64; | |
327 | ||
a49170b5 | 328 | return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr, |
eb76d55e | 329 | &ext_addr->address); |
046d9ce6 RW |
330 | } |
331 | EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space); | |
332 | ||
333 | /** | |
334 | * acpi_dev_irq_flags - Determine IRQ resource flags. | |
335 | * @triggering: Triggering type as provided by ACPI. | |
336 | * @polarity: Interrupt polarity as provided by ACPI. | |
337 | * @shareable: Whether or not the interrupt is shareable. | |
338 | */ | |
339 | unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable) | |
340 | { | |
341 | unsigned long flags; | |
342 | ||
343 | if (triggering == ACPI_LEVEL_SENSITIVE) | |
344 | flags = polarity == ACPI_ACTIVE_LOW ? | |
345 | IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL; | |
346 | else | |
347 | flags = polarity == ACPI_ACTIVE_LOW ? | |
348 | IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE; | |
349 | ||
350 | if (shareable == ACPI_SHARED) | |
351 | flags |= IORESOURCE_IRQ_SHAREABLE; | |
352 | ||
353 | return flags | IORESOURCE_IRQ; | |
354 | } | |
355 | EXPORT_SYMBOL_GPL(acpi_dev_irq_flags); | |
356 | ||
55a93417 CR |
357 | /** |
358 | * acpi_dev_get_irq_type - Determine irq type. | |
359 | * @triggering: Triggering type as provided by ACPI. | |
360 | * @polarity: Interrupt polarity as provided by ACPI. | |
361 | */ | |
362 | unsigned int acpi_dev_get_irq_type(int triggering, int polarity) | |
363 | { | |
364 | switch (polarity) { | |
365 | case ACPI_ACTIVE_LOW: | |
366 | return triggering == ACPI_EDGE_SENSITIVE ? | |
367 | IRQ_TYPE_EDGE_FALLING : | |
368 | IRQ_TYPE_LEVEL_LOW; | |
369 | case ACPI_ACTIVE_HIGH: | |
370 | return triggering == ACPI_EDGE_SENSITIVE ? | |
371 | IRQ_TYPE_EDGE_RISING : | |
372 | IRQ_TYPE_LEVEL_HIGH; | |
373 | case ACPI_ACTIVE_BOTH: | |
374 | if (triggering == ACPI_EDGE_SENSITIVE) | |
375 | return IRQ_TYPE_EDGE_BOTH; | |
1be9c3a0 | 376 | /* fall through */ |
55a93417 CR |
377 | default: |
378 | return IRQ_TYPE_NONE; | |
379 | } | |
380 | } | |
381 | EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type); | |
382 | ||
046d9ce6 RW |
383 | static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi) |
384 | { | |
385 | res->start = gsi; | |
386 | res->end = gsi; | |
c78b6885 | 387 | res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 RW |
388 | } |
389 | ||
390 | static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, | |
204ebc0a MW |
391 | u8 triggering, u8 polarity, u8 shareable, |
392 | bool legacy) | |
046d9ce6 RW |
393 | { |
394 | int irq, p, t; | |
395 | ||
396 | if (!valid_IRQ(gsi)) { | |
397 | acpi_dev_irqresource_disabled(res, gsi); | |
398 | return; | |
399 | } | |
400 | ||
401 | /* | |
03671057 | 402 | * In IO-APIC mode, use overridden attribute. Two reasons: |
046d9ce6 RW |
403 | * 1. BIOS bug in DSDT |
404 | * 2. BIOS uses IO-APIC mode Interrupt Source Override | |
204ebc0a MW |
405 | * |
406 | * We do this only if we are dealing with IRQ() or IRQNoFlags() | |
407 | * resource (the legacy ISA resources). With modern ACPI 5 devices | |
408 | * using extended IRQ descriptors we take the IRQ configuration | |
409 | * from _CRS directly. | |
046d9ce6 | 410 | */ |
204ebc0a | 411 | if (legacy && !acpi_get_override_irq(gsi, &t, &p)) { |
046d9ce6 RW |
412 | u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; |
413 | u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; | |
414 | ||
415 | if (triggering != trig || polarity != pol) { | |
416 | pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi, | |
204ebc0a | 417 | t ? "level" : "edge", p ? "low" : "high"); |
046d9ce6 RW |
418 | triggering = trig; |
419 | polarity = pol; | |
420 | } | |
421 | } | |
422 | ||
423 | res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); | |
424 | irq = acpi_register_gsi(NULL, gsi, triggering, polarity); | |
425 | if (irq >= 0) { | |
426 | res->start = irq; | |
427 | res->end = irq; | |
428 | } else { | |
429 | acpi_dev_irqresource_disabled(res, gsi); | |
430 | } | |
431 | } | |
432 | ||
433 | /** | |
434 | * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. | |
435 | * @ares: Input ACPI resource object. | |
436 | * @index: Index into the array of GSIs represented by the resource. | |
437 | * @res: Output generic resource object. | |
438 | * | |
439 | * Check if the given ACPI resource object represents an interrupt resource | |
440 | * and @index does not exceed the resource's interrupt count (true is returned | |
441 | * in that case regardless of the results of the other checks)). If that's the | |
442 | * case, register the GSI corresponding to @index from the array of interrupts | |
443 | * represented by the resource and populate the generic resource object pointed | |
444 | * to by @res accordingly. If the registration of the GSI is not successful, | |
445 | * IORESOURCE_DISABLED will be set it that object's flags. | |
581c19f3 JL |
446 | * |
447 | * Return: | |
448 | * 1) false with res->flags setting to zero: not the expected resource type | |
449 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
450 | * 3) true: valid assigned resource | |
046d9ce6 RW |
451 | */ |
452 | bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, | |
453 | struct resource *res) | |
454 | { | |
455 | struct acpi_resource_irq *irq; | |
456 | struct acpi_resource_extended_irq *ext_irq; | |
457 | ||
458 | switch (ares->type) { | |
459 | case ACPI_RESOURCE_TYPE_IRQ: | |
460 | /* | |
461 | * Per spec, only one interrupt per descriptor is allowed in | |
462 | * _CRS, but some firmware violates this, so parse them all. | |
463 | */ | |
464 | irq = &ares->data.irq; | |
465 | if (index >= irq->interrupt_count) { | |
466 | acpi_dev_irqresource_disabled(res, 0); | |
467 | return false; | |
468 | } | |
469 | acpi_dev_get_irqresource(res, irq->interrupts[index], | |
470 | irq->triggering, irq->polarity, | |
c163f90c | 471 | irq->shareable, true); |
046d9ce6 RW |
472 | break; |
473 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
474 | ext_irq = &ares->data.extended_irq; | |
475 | if (index >= ext_irq->interrupt_count) { | |
476 | acpi_dev_irqresource_disabled(res, 0); | |
477 | return false; | |
478 | } | |
fa20b176 AVF |
479 | if (is_gsi(ext_irq)) |
480 | acpi_dev_get_irqresource(res, ext_irq->interrupts[index], | |
046d9ce6 | 481 | ext_irq->triggering, ext_irq->polarity, |
c163f90c | 482 | ext_irq->shareable, false); |
fa20b176 AVF |
483 | else |
484 | acpi_dev_irqresource_disabled(res, 0); | |
046d9ce6 RW |
485 | break; |
486 | default: | |
581c19f3 | 487 | res->flags = 0; |
046d9ce6 RW |
488 | return false; |
489 | } | |
490 | ||
491 | return true; | |
492 | } | |
493 | EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); | |
8e345c99 RW |
494 | |
495 | /** | |
496 | * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). | |
497 | * @list: The head of the resource list to free. | |
498 | */ | |
499 | void acpi_dev_free_resource_list(struct list_head *list) | |
500 | { | |
90e97820 | 501 | resource_list_free(list); |
8e345c99 RW |
502 | } |
503 | EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); | |
504 | ||
505 | struct res_proc_context { | |
506 | struct list_head *list; | |
507 | int (*preproc)(struct acpi_resource *, void *); | |
508 | void *preproc_data; | |
509 | int count; | |
510 | int error; | |
511 | }; | |
512 | ||
a49170b5 | 513 | static acpi_status acpi_dev_new_resource_entry(struct resource_win *win, |
8e345c99 RW |
514 | struct res_proc_context *c) |
515 | { | |
90e97820 | 516 | struct resource_entry *rentry; |
8e345c99 | 517 | |
90e97820 | 518 | rentry = resource_list_create_entry(NULL, 0); |
8e345c99 RW |
519 | if (!rentry) { |
520 | c->error = -ENOMEM; | |
521 | return AE_NO_MEMORY; | |
522 | } | |
90e97820 | 523 | *rentry->res = win->res; |
93286f47 | 524 | rentry->offset = win->offset; |
90e97820 | 525 | resource_list_add_tail(rentry, c->list); |
8e345c99 RW |
526 | c->count++; |
527 | return AE_OK; | |
528 | } | |
529 | ||
530 | static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, | |
531 | void *context) | |
532 | { | |
533 | struct res_proc_context *c = context; | |
a49170b5 JL |
534 | struct resource_win win; |
535 | struct resource *res = &win.res; | |
8e345c99 RW |
536 | int i; |
537 | ||
538 | if (c->preproc) { | |
539 | int ret; | |
540 | ||
541 | ret = c->preproc(ares, c->preproc_data); | |
542 | if (ret < 0) { | |
543 | c->error = ret; | |
8a66790b | 544 | return AE_CTRL_TERMINATE; |
8e345c99 RW |
545 | } else if (ret > 0) { |
546 | return AE_OK; | |
547 | } | |
548 | } | |
549 | ||
a49170b5 | 550 | memset(&win, 0, sizeof(win)); |
8e345c99 | 551 | |
a49170b5 JL |
552 | if (acpi_dev_resource_memory(ares, res) |
553 | || acpi_dev_resource_io(ares, res) | |
554 | || acpi_dev_resource_address_space(ares, &win) | |
555 | || acpi_dev_resource_ext_address_space(ares, &win)) | |
556 | return acpi_dev_new_resource_entry(&win, c); | |
8e345c99 | 557 | |
a49170b5 | 558 | for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) { |
8e345c99 RW |
559 | acpi_status status; |
560 | ||
a49170b5 | 561 | status = acpi_dev_new_resource_entry(&win, c); |
8e345c99 RW |
562 | if (ACPI_FAILURE(status)) |
563 | return status; | |
564 | } | |
565 | ||
566 | return AE_OK; | |
567 | } | |
568 | ||
4f0450af LP |
569 | static int __acpi_dev_get_resources(struct acpi_device *adev, |
570 | struct list_head *list, | |
571 | int (*preproc)(struct acpi_resource *, void *), | |
572 | void *preproc_data, char *method) | |
573 | { | |
574 | struct res_proc_context c; | |
575 | acpi_status status; | |
576 | ||
577 | if (!adev || !adev->handle || !list_empty(list)) | |
578 | return -EINVAL; | |
579 | ||
580 | if (!acpi_has_method(adev->handle, method)) | |
581 | return 0; | |
582 | ||
583 | c.list = list; | |
584 | c.preproc = preproc; | |
585 | c.preproc_data = preproc_data; | |
586 | c.count = 0; | |
587 | c.error = 0; | |
588 | status = acpi_walk_resources(adev->handle, method, | |
589 | acpi_dev_process_resource, &c); | |
590 | if (ACPI_FAILURE(status)) { | |
591 | acpi_dev_free_resource_list(list); | |
592 | return c.error ? c.error : -EIO; | |
593 | } | |
594 | ||
595 | return c.count; | |
596 | } | |
597 | ||
8e345c99 RW |
598 | /** |
599 | * acpi_dev_get_resources - Get current resources of a device. | |
600 | * @adev: ACPI device node to get the resources for. | |
601 | * @list: Head of the resultant list of resources (must be empty). | |
602 | * @preproc: The caller's preprocessing routine. | |
603 | * @preproc_data: Pointer passed to the caller's preprocessing routine. | |
604 | * | |
605 | * Evaluate the _CRS method for the given device node and process its output by | |
606 | * (1) executing the @preproc() rountine provided by the caller, passing the | |
607 | * resource pointer and @preproc_data to it as arguments, for each ACPI resource | |
608 | * returned and (2) converting all of the returned ACPI resources into struct | |
609 | * resource objects if possible. If the return value of @preproc() in step (1) | |
610 | * is different from 0, step (2) is not applied to the given ACPI resource and | |
611 | * if that value is negative, the whole processing is aborted and that value is | |
612 | * returned as the final error code. | |
613 | * | |
614 | * The resultant struct resource objects are put on the list pointed to by | |
90e97820 | 615 | * @list, that must be empty initially, as members of struct resource_entry |
8e345c99 RW |
616 | * objects. Callers of this routine should use %acpi_dev_free_resource_list() to |
617 | * free that list. | |
618 | * | |
619 | * The number of resources in the output list is returned on success, an error | |
620 | * code reflecting the error condition is returned otherwise. | |
621 | */ | |
622 | int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, | |
623 | int (*preproc)(struct acpi_resource *, void *), | |
624 | void *preproc_data) | |
625 | { | |
4f0450af LP |
626 | return __acpi_dev_get_resources(adev, list, preproc, preproc_data, |
627 | METHOD_NAME__CRS); | |
8e345c99 RW |
628 | } |
629 | EXPORT_SYMBOL_GPL(acpi_dev_get_resources); | |
62d1141f | 630 | |
c04ac679 LP |
631 | static int is_memory(struct acpi_resource *ares, void *not_used) |
632 | { | |
633 | struct resource_win win; | |
634 | struct resource *res = &win.res; | |
635 | ||
636 | memset(&win, 0, sizeof(win)); | |
637 | ||
638 | return !(acpi_dev_resource_memory(ares, res) | |
639 | || acpi_dev_resource_address_space(ares, &win) | |
640 | || acpi_dev_resource_ext_address_space(ares, &win)); | |
641 | } | |
642 | ||
643 | /** | |
644 | * acpi_dev_get_dma_resources - Get current DMA resources of a device. | |
645 | * @adev: ACPI device node to get the resources for. | |
646 | * @list: Head of the resultant list of resources (must be empty). | |
647 | * | |
648 | * Evaluate the _DMA method for the given device node and process its | |
649 | * output. | |
650 | * | |
651 | * The resultant struct resource objects are put on the list pointed to | |
652 | * by @list, that must be empty initially, as members of struct | |
653 | * resource_entry objects. Callers of this routine should use | |
654 | * %acpi_dev_free_resource_list() to free that list. | |
655 | * | |
656 | * The number of resources in the output list is returned on success, | |
657 | * an error code reflecting the error condition is returned otherwise. | |
658 | */ | |
659 | int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list) | |
660 | { | |
661 | return __acpi_dev_get_resources(adev, list, is_memory, NULL, | |
662 | METHOD_NAME__DMA); | |
663 | } | |
664 | EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources); | |
665 | ||
62d1141f JL |
666 | /** |
667 | * acpi_dev_filter_resource_type - Filter ACPI resource according to resource | |
668 | * types | |
669 | * @ares: Input ACPI resource object. | |
670 | * @types: Valid resource types of IORESOURCE_XXX | |
671 | * | |
2c62e849 | 672 | * This is a helper function to support acpi_dev_get_resources(), which filters |
62d1141f JL |
673 | * ACPI resource objects according to resource types. |
674 | */ | |
675 | int acpi_dev_filter_resource_type(struct acpi_resource *ares, | |
676 | unsigned long types) | |
677 | { | |
678 | unsigned long type = 0; | |
679 | ||
680 | switch (ares->type) { | |
681 | case ACPI_RESOURCE_TYPE_MEMORY24: | |
682 | case ACPI_RESOURCE_TYPE_MEMORY32: | |
683 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: | |
684 | type = IORESOURCE_MEM; | |
685 | break; | |
686 | case ACPI_RESOURCE_TYPE_IO: | |
687 | case ACPI_RESOURCE_TYPE_FIXED_IO: | |
688 | type = IORESOURCE_IO; | |
689 | break; | |
690 | case ACPI_RESOURCE_TYPE_IRQ: | |
691 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
692 | type = IORESOURCE_IRQ; | |
693 | break; | |
694 | case ACPI_RESOURCE_TYPE_DMA: | |
695 | case ACPI_RESOURCE_TYPE_FIXED_DMA: | |
696 | type = IORESOURCE_DMA; | |
697 | break; | |
698 | case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: | |
699 | type = IORESOURCE_REG; | |
700 | break; | |
701 | case ACPI_RESOURCE_TYPE_ADDRESS16: | |
702 | case ACPI_RESOURCE_TYPE_ADDRESS32: | |
703 | case ACPI_RESOURCE_TYPE_ADDRESS64: | |
704 | case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: | |
705 | if (ares->data.address.resource_type == ACPI_MEMORY_RANGE) | |
706 | type = IORESOURCE_MEM; | |
707 | else if (ares->data.address.resource_type == ACPI_IO_RANGE) | |
708 | type = IORESOURCE_IO; | |
709 | else if (ares->data.address.resource_type == | |
710 | ACPI_BUS_NUMBER_RANGE) | |
711 | type = IORESOURCE_BUS; | |
712 | break; | |
713 | default: | |
714 | break; | |
715 | } | |
716 | ||
717 | return (type & types) ? 0 : 1; | |
718 | } | |
719 | EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type); | |
00710984 BH |
720 | |
721 | static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res) | |
722 | { | |
723 | struct list_head resource_list; | |
724 | struct resource_entry *rentry; | |
725 | int ret, found = 0; | |
726 | ||
727 | INIT_LIST_HEAD(&resource_list); | |
728 | ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL); | |
729 | if (ret < 0) | |
730 | return 0; | |
731 | ||
732 | list_for_each_entry(rentry, &resource_list, node) { | |
733 | if (resource_contains(rentry->res, res)) { | |
734 | found = 1; | |
735 | break; | |
736 | } | |
737 | ||
738 | } | |
739 | ||
740 | acpi_dev_free_resource_list(&resource_list); | |
741 | return found; | |
742 | } | |
743 | ||
744 | static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth, | |
745 | void *context, void **ret) | |
746 | { | |
747 | struct resource *res = context; | |
748 | struct acpi_device **consumer = (struct acpi_device **) ret; | |
749 | struct acpi_device *adev; | |
750 | ||
751 | if (acpi_bus_get_device(handle, &adev)) | |
752 | return AE_OK; | |
753 | ||
754 | if (acpi_dev_consumes_res(adev, res)) { | |
755 | *consumer = adev; | |
756 | return AE_CTRL_TERMINATE; | |
757 | } | |
758 | ||
759 | return AE_OK; | |
760 | } | |
761 | ||
762 | /** | |
763 | * acpi_resource_consumer - Find the ACPI device that consumes @res. | |
764 | * @res: Resource to search for. | |
765 | * | |
766 | * Search the current resource settings (_CRS) of every ACPI device node | |
767 | * for @res. If we find an ACPI device whose _CRS includes @res, return | |
768 | * it. Otherwise, return NULL. | |
769 | */ | |
770 | struct acpi_device *acpi_resource_consumer(struct resource *res) | |
771 | { | |
772 | struct acpi_device *consumer = NULL; | |
773 | ||
774 | acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer); | |
775 | return consumer; | |
776 | } |