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046d9ce6 RW |
1 | /* |
2 | * drivers/acpi/resource.c - ACPI device resources interpretation. | |
3 | * | |
4 | * Copyright (C) 2012, Intel Corp. | |
5 | * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as published | |
11 | * by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
046d9ce6 RW |
18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
19 | */ | |
20 | ||
21 | #include <linux/acpi.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/export.h> | |
24 | #include <linux/ioport.h> | |
8e345c99 | 25 | #include <linux/slab.h> |
55a93417 | 26 | #include <linux/irq.h> |
046d9ce6 RW |
27 | |
28 | #ifdef CONFIG_X86 | |
29 | #define valid_IRQ(i) (((i) != 0) && ((i) != 2)) | |
4a2e7aab LP |
30 | static inline bool acpi_iospace_resource_valid(struct resource *res) |
31 | { | |
32 | /* On X86 IO space is limited to the [0 - 64K] IO port range */ | |
33 | return res->end < 0x10003; | |
34 | } | |
046d9ce6 RW |
35 | #else |
36 | #define valid_IRQ(i) (true) | |
4a2e7aab LP |
37 | /* |
38 | * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical | |
39 | * addresses mapping IO space in CPU physical address space, IO space | |
40 | * resources can be placed anywhere in the 64-bit physical address space. | |
41 | */ | |
42 | static inline bool | |
43 | acpi_iospace_resource_valid(struct resource *res) { return true; } | |
046d9ce6 RW |
44 | #endif |
45 | ||
c420dbd1 | 46 | static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io) |
046d9ce6 | 47 | { |
c420dbd1 | 48 | u64 reslen = end - start + 1; |
046d9ce6 | 49 | |
c420dbd1 TG |
50 | /* |
51 | * CHECKME: len might be required to check versus a minimum | |
52 | * length as well. 1 for io is fine, but for memory it does | |
53 | * not make any sense at all. | |
aa714d28 JL |
54 | * Note: some BIOSes report incorrect length for ACPI address space |
55 | * descriptor, so remove check of 'reslen == len' to avoid regression. | |
c420dbd1 | 56 | */ |
aa714d28 | 57 | if (len && reslen && start <= end) |
c420dbd1 TG |
58 | return true; |
59 | ||
6a239af2 | 60 | pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n", |
c420dbd1 TG |
61 | io ? "io" : "mem", start, end, len); |
62 | ||
63 | return false; | |
64 | } | |
65 | ||
66 | static void acpi_dev_memresource_flags(struct resource *res, u64 len, | |
72e26b0d | 67 | u8 write_protect) |
c420dbd1 TG |
68 | { |
69 | res->flags = IORESOURCE_MEM; | |
70 | ||
71 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, false)) | |
c78b6885 | 72 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 RW |
73 | |
74 | if (write_protect == ACPI_READ_WRITE_MEMORY) | |
c420dbd1 | 75 | res->flags |= IORESOURCE_MEM_WRITEABLE; |
046d9ce6 RW |
76 | } |
77 | ||
78 | static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len, | |
79 | u8 write_protect) | |
80 | { | |
81 | res->start = start; | |
82 | res->end = start + len - 1; | |
72e26b0d | 83 | acpi_dev_memresource_flags(res, len, write_protect); |
046d9ce6 RW |
84 | } |
85 | ||
86 | /** | |
87 | * acpi_dev_resource_memory - Extract ACPI memory resource information. | |
88 | * @ares: Input ACPI resource object. | |
89 | * @res: Output generic resource object. | |
90 | * | |
91 | * Check if the given ACPI resource object represents a memory resource and | |
92 | * if that's the case, use the information in it to populate the generic | |
93 | * resource object pointed to by @res. | |
581c19f3 JL |
94 | * |
95 | * Return: | |
96 | * 1) false with res->flags setting to zero: not the expected resource type | |
97 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
98 | * 3) true: valid assigned resource | |
046d9ce6 RW |
99 | */ |
100 | bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res) | |
101 | { | |
102 | struct acpi_resource_memory24 *memory24; | |
103 | struct acpi_resource_memory32 *memory32; | |
104 | struct acpi_resource_fixed_memory32 *fixed_memory32; | |
105 | ||
106 | switch (ares->type) { | |
107 | case ACPI_RESOURCE_TYPE_MEMORY24: | |
108 | memory24 = &ares->data.memory24; | |
8515f936 JL |
109 | acpi_dev_get_memresource(res, memory24->minimum << 8, |
110 | memory24->address_length << 8, | |
046d9ce6 RW |
111 | memory24->write_protect); |
112 | break; | |
113 | case ACPI_RESOURCE_TYPE_MEMORY32: | |
114 | memory32 = &ares->data.memory32; | |
115 | acpi_dev_get_memresource(res, memory32->minimum, | |
116 | memory32->address_length, | |
117 | memory32->write_protect); | |
118 | break; | |
119 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: | |
120 | fixed_memory32 = &ares->data.fixed_memory32; | |
121 | acpi_dev_get_memresource(res, fixed_memory32->address, | |
122 | fixed_memory32->address_length, | |
123 | fixed_memory32->write_protect); | |
124 | break; | |
125 | default: | |
581c19f3 | 126 | res->flags = 0; |
046d9ce6 RW |
127 | return false; |
128 | } | |
c420dbd1 TG |
129 | |
130 | return !(res->flags & IORESOURCE_DISABLED); | |
046d9ce6 RW |
131 | } |
132 | EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); | |
133 | ||
1d0420f1 | 134 | static void acpi_dev_ioresource_flags(struct resource *res, u64 len, |
91236ecc | 135 | u8 io_decode, u8 translation_type) |
046d9ce6 | 136 | { |
1d0420f1 | 137 | res->flags = IORESOURCE_IO; |
046d9ce6 | 138 | |
1d0420f1 | 139 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, true)) |
c78b6885 | 140 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
1d0420f1 | 141 | |
4a2e7aab | 142 | if (!acpi_iospace_resource_valid(res)) |
c78b6885 | 143 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 | 144 | |
1d0420f1 TG |
145 | if (io_decode == ACPI_DECODE_16) |
146 | res->flags |= IORESOURCE_IO_16BIT_ADDR; | |
91236ecc JL |
147 | if (translation_type == ACPI_SPARSE_TRANSLATION) |
148 | res->flags |= IORESOURCE_IO_SPARSE; | |
046d9ce6 RW |
149 | } |
150 | ||
151 | static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, | |
152 | u8 io_decode) | |
153 | { | |
046d9ce6 | 154 | res->start = start; |
1d0420f1 | 155 | res->end = start + len - 1; |
91236ecc | 156 | acpi_dev_ioresource_flags(res, len, io_decode, 0); |
046d9ce6 RW |
157 | } |
158 | ||
159 | /** | |
160 | * acpi_dev_resource_io - Extract ACPI I/O resource information. | |
161 | * @ares: Input ACPI resource object. | |
162 | * @res: Output generic resource object. | |
163 | * | |
164 | * Check if the given ACPI resource object represents an I/O resource and | |
165 | * if that's the case, use the information in it to populate the generic | |
166 | * resource object pointed to by @res. | |
581c19f3 JL |
167 | * |
168 | * Return: | |
169 | * 1) false with res->flags setting to zero: not the expected resource type | |
170 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
171 | * 3) true: valid assigned resource | |
046d9ce6 RW |
172 | */ |
173 | bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res) | |
174 | { | |
175 | struct acpi_resource_io *io; | |
176 | struct acpi_resource_fixed_io *fixed_io; | |
177 | ||
178 | switch (ares->type) { | |
179 | case ACPI_RESOURCE_TYPE_IO: | |
180 | io = &ares->data.io; | |
181 | acpi_dev_get_ioresource(res, io->minimum, | |
182 | io->address_length, | |
183 | io->io_decode); | |
184 | break; | |
185 | case ACPI_RESOURCE_TYPE_FIXED_IO: | |
186 | fixed_io = &ares->data.fixed_io; | |
187 | acpi_dev_get_ioresource(res, fixed_io->address, | |
188 | fixed_io->address_length, | |
189 | ACPI_DECODE_10); | |
190 | break; | |
191 | default: | |
581c19f3 | 192 | res->flags = 0; |
046d9ce6 RW |
193 | return false; |
194 | } | |
1d0420f1 TG |
195 | |
196 | return !(res->flags & IORESOURCE_DISABLED); | |
046d9ce6 RW |
197 | } |
198 | EXPORT_SYMBOL_GPL(acpi_dev_resource_io); | |
199 | ||
a49170b5 | 200 | static bool acpi_decode_space(struct resource_win *win, |
eb76d55e TG |
201 | struct acpi_resource_address *addr, |
202 | struct acpi_address64_attribute *attr) | |
203 | { | |
204 | u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16; | |
eb76d55e TG |
205 | bool wp = addr->info.mem.write_protect; |
206 | u64 len = attr->address_length; | |
1fb01ca9 | 207 | u64 start, end, offset = 0; |
a49170b5 | 208 | struct resource *res = &win->res; |
eb76d55e | 209 | |
a274019f JL |
210 | /* |
211 | * Filter out invalid descriptor according to ACPI Spec 5.0, section | |
212 | * 6.4.3.5 Address Space Resource Descriptors. | |
213 | */ | |
214 | if ((addr->min_address_fixed != addr->max_address_fixed && len) || | |
215 | (addr->min_address_fixed && addr->max_address_fixed && !len)) | |
216 | pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n", | |
217 | addr->min_address_fixed, addr->max_address_fixed, len); | |
218 | ||
2ea3d266 JL |
219 | /* |
220 | * For bridges that translate addresses across the bridge, | |
221 | * translation_offset is the offset that must be added to the | |
222 | * address on the secondary side to obtain the address on the | |
223 | * primary side. Non-bridge devices must list 0 for all Address | |
224 | * Translation offset bits. | |
225 | */ | |
1fb01ca9 JL |
226 | if (addr->producer_consumer == ACPI_PRODUCER) |
227 | offset = attr->translation_offset; | |
228 | else if (attr->translation_offset) | |
2ea3d266 JL |
229 | pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n", |
230 | attr->translation_offset); | |
1fb01ca9 JL |
231 | start = attr->minimum + offset; |
232 | end = attr->maximum + offset; | |
233 | ||
234 | win->offset = offset; | |
235 | res->start = start; | |
236 | res->end = end; | |
237 | if (sizeof(resource_size_t) < sizeof(u64) && | |
238 | (offset != win->offset || start != res->start || end != res->end)) { | |
239 | pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n", | |
240 | attr->minimum, attr->maximum); | |
241 | return false; | |
2ea3d266 JL |
242 | } |
243 | ||
eb76d55e TG |
244 | switch (addr->resource_type) { |
245 | case ACPI_MEMORY_RANGE: | |
72e26b0d | 246 | acpi_dev_memresource_flags(res, len, wp); |
eb76d55e TG |
247 | break; |
248 | case ACPI_IO_RANGE: | |
91236ecc JL |
249 | acpi_dev_ioresource_flags(res, len, iodec, |
250 | addr->info.io.translation_type); | |
eb76d55e TG |
251 | break; |
252 | case ACPI_BUS_NUMBER_RANGE: | |
253 | res->flags = IORESOURCE_BUS; | |
254 | break; | |
255 | default: | |
256 | return false; | |
257 | } | |
258 | ||
72e26b0d TG |
259 | if (addr->producer_consumer == ACPI_PRODUCER) |
260 | res->flags |= IORESOURCE_WINDOW; | |
fcb29bbc TG |
261 | |
262 | if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY) | |
263 | res->flags |= IORESOURCE_PREFETCH; | |
72e26b0d | 264 | |
eb76d55e TG |
265 | return !(res->flags & IORESOURCE_DISABLED); |
266 | } | |
267 | ||
046d9ce6 RW |
268 | /** |
269 | * acpi_dev_resource_address_space - Extract ACPI address space information. | |
270 | * @ares: Input ACPI resource object. | |
a49170b5 | 271 | * @win: Output generic resource object. |
046d9ce6 RW |
272 | * |
273 | * Check if the given ACPI resource object represents an address space resource | |
274 | * and if that's the case, use the information in it to populate the generic | |
a49170b5 | 275 | * resource object pointed to by @win. |
581c19f3 JL |
276 | * |
277 | * Return: | |
a49170b5 JL |
278 | * 1) false with win->res.flags setting to zero: not the expected resource type |
279 | * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned | |
280 | * resource | |
581c19f3 | 281 | * 3) true: valid assigned resource |
046d9ce6 RW |
282 | */ |
283 | bool acpi_dev_resource_address_space(struct acpi_resource *ares, | |
a49170b5 | 284 | struct resource_win *win) |
046d9ce6 | 285 | { |
046d9ce6 | 286 | struct acpi_resource_address64 addr; |
046d9ce6 | 287 | |
a49170b5 | 288 | win->res.flags = 0; |
eb76d55e | 289 | if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr))) |
6658c739 | 290 | return false; |
046d9ce6 | 291 | |
a49170b5 | 292 | return acpi_decode_space(win, (struct acpi_resource_address *)&addr, |
eb76d55e | 293 | &addr.address); |
046d9ce6 RW |
294 | } |
295 | EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space); | |
296 | ||
297 | /** | |
298 | * acpi_dev_resource_ext_address_space - Extract ACPI address space information. | |
299 | * @ares: Input ACPI resource object. | |
a49170b5 | 300 | * @win: Output generic resource object. |
046d9ce6 RW |
301 | * |
302 | * Check if the given ACPI resource object represents an extended address space | |
303 | * resource and if that's the case, use the information in it to populate the | |
a49170b5 | 304 | * generic resource object pointed to by @win. |
581c19f3 JL |
305 | * |
306 | * Return: | |
a49170b5 JL |
307 | * 1) false with win->res.flags setting to zero: not the expected resource type |
308 | * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned | |
309 | * resource | |
581c19f3 | 310 | * 3) true: valid assigned resource |
046d9ce6 RW |
311 | */ |
312 | bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, | |
a49170b5 | 313 | struct resource_win *win) |
046d9ce6 RW |
314 | { |
315 | struct acpi_resource_extended_address64 *ext_addr; | |
046d9ce6 | 316 | |
a49170b5 | 317 | win->res.flags = 0; |
046d9ce6 RW |
318 | if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) |
319 | return false; | |
320 | ||
321 | ext_addr = &ares->data.ext_address64; | |
322 | ||
a49170b5 | 323 | return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr, |
eb76d55e | 324 | &ext_addr->address); |
046d9ce6 RW |
325 | } |
326 | EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space); | |
327 | ||
328 | /** | |
329 | * acpi_dev_irq_flags - Determine IRQ resource flags. | |
330 | * @triggering: Triggering type as provided by ACPI. | |
331 | * @polarity: Interrupt polarity as provided by ACPI. | |
332 | * @shareable: Whether or not the interrupt is shareable. | |
333 | */ | |
334 | unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable) | |
335 | { | |
336 | unsigned long flags; | |
337 | ||
338 | if (triggering == ACPI_LEVEL_SENSITIVE) | |
339 | flags = polarity == ACPI_ACTIVE_LOW ? | |
340 | IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL; | |
341 | else | |
342 | flags = polarity == ACPI_ACTIVE_LOW ? | |
343 | IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE; | |
344 | ||
345 | if (shareable == ACPI_SHARED) | |
346 | flags |= IORESOURCE_IRQ_SHAREABLE; | |
347 | ||
348 | return flags | IORESOURCE_IRQ; | |
349 | } | |
350 | EXPORT_SYMBOL_GPL(acpi_dev_irq_flags); | |
351 | ||
55a93417 CR |
352 | /** |
353 | * acpi_dev_get_irq_type - Determine irq type. | |
354 | * @triggering: Triggering type as provided by ACPI. | |
355 | * @polarity: Interrupt polarity as provided by ACPI. | |
356 | */ | |
357 | unsigned int acpi_dev_get_irq_type(int triggering, int polarity) | |
358 | { | |
359 | switch (polarity) { | |
360 | case ACPI_ACTIVE_LOW: | |
361 | return triggering == ACPI_EDGE_SENSITIVE ? | |
362 | IRQ_TYPE_EDGE_FALLING : | |
363 | IRQ_TYPE_LEVEL_LOW; | |
364 | case ACPI_ACTIVE_HIGH: | |
365 | return triggering == ACPI_EDGE_SENSITIVE ? | |
366 | IRQ_TYPE_EDGE_RISING : | |
367 | IRQ_TYPE_LEVEL_HIGH; | |
368 | case ACPI_ACTIVE_BOTH: | |
369 | if (triggering == ACPI_EDGE_SENSITIVE) | |
370 | return IRQ_TYPE_EDGE_BOTH; | |
371 | default: | |
372 | return IRQ_TYPE_NONE; | |
373 | } | |
374 | } | |
375 | EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type); | |
376 | ||
046d9ce6 RW |
377 | static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi) |
378 | { | |
379 | res->start = gsi; | |
380 | res->end = gsi; | |
c78b6885 | 381 | res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 RW |
382 | } |
383 | ||
384 | static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, | |
204ebc0a MW |
385 | u8 triggering, u8 polarity, u8 shareable, |
386 | bool legacy) | |
046d9ce6 RW |
387 | { |
388 | int irq, p, t; | |
389 | ||
390 | if (!valid_IRQ(gsi)) { | |
391 | acpi_dev_irqresource_disabled(res, gsi); | |
392 | return; | |
393 | } | |
394 | ||
395 | /* | |
396 | * In IO-APIC mode, use overrided attribute. Two reasons: | |
397 | * 1. BIOS bug in DSDT | |
398 | * 2. BIOS uses IO-APIC mode Interrupt Source Override | |
204ebc0a MW |
399 | * |
400 | * We do this only if we are dealing with IRQ() or IRQNoFlags() | |
401 | * resource (the legacy ISA resources). With modern ACPI 5 devices | |
402 | * using extended IRQ descriptors we take the IRQ configuration | |
403 | * from _CRS directly. | |
046d9ce6 | 404 | */ |
204ebc0a | 405 | if (legacy && !acpi_get_override_irq(gsi, &t, &p)) { |
046d9ce6 RW |
406 | u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; |
407 | u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; | |
408 | ||
409 | if (triggering != trig || polarity != pol) { | |
410 | pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi, | |
204ebc0a | 411 | t ? "level" : "edge", p ? "low" : "high"); |
046d9ce6 RW |
412 | triggering = trig; |
413 | polarity = pol; | |
414 | } | |
415 | } | |
416 | ||
417 | res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); | |
418 | irq = acpi_register_gsi(NULL, gsi, triggering, polarity); | |
419 | if (irq >= 0) { | |
420 | res->start = irq; | |
421 | res->end = irq; | |
422 | } else { | |
423 | acpi_dev_irqresource_disabled(res, gsi); | |
424 | } | |
425 | } | |
426 | ||
427 | /** | |
428 | * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. | |
429 | * @ares: Input ACPI resource object. | |
430 | * @index: Index into the array of GSIs represented by the resource. | |
431 | * @res: Output generic resource object. | |
432 | * | |
433 | * Check if the given ACPI resource object represents an interrupt resource | |
434 | * and @index does not exceed the resource's interrupt count (true is returned | |
435 | * in that case regardless of the results of the other checks)). If that's the | |
436 | * case, register the GSI corresponding to @index from the array of interrupts | |
437 | * represented by the resource and populate the generic resource object pointed | |
438 | * to by @res accordingly. If the registration of the GSI is not successful, | |
439 | * IORESOURCE_DISABLED will be set it that object's flags. | |
581c19f3 JL |
440 | * |
441 | * Return: | |
442 | * 1) false with res->flags setting to zero: not the expected resource type | |
443 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
444 | * 3) true: valid assigned resource | |
046d9ce6 RW |
445 | */ |
446 | bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, | |
447 | struct resource *res) | |
448 | { | |
449 | struct acpi_resource_irq *irq; | |
450 | struct acpi_resource_extended_irq *ext_irq; | |
451 | ||
452 | switch (ares->type) { | |
453 | case ACPI_RESOURCE_TYPE_IRQ: | |
454 | /* | |
455 | * Per spec, only one interrupt per descriptor is allowed in | |
456 | * _CRS, but some firmware violates this, so parse them all. | |
457 | */ | |
458 | irq = &ares->data.irq; | |
459 | if (index >= irq->interrupt_count) { | |
460 | acpi_dev_irqresource_disabled(res, 0); | |
461 | return false; | |
462 | } | |
463 | acpi_dev_get_irqresource(res, irq->interrupts[index], | |
464 | irq->triggering, irq->polarity, | |
204ebc0a | 465 | irq->sharable, true); |
046d9ce6 RW |
466 | break; |
467 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
468 | ext_irq = &ares->data.extended_irq; | |
469 | if (index >= ext_irq->interrupt_count) { | |
470 | acpi_dev_irqresource_disabled(res, 0); | |
471 | return false; | |
472 | } | |
473 | acpi_dev_get_irqresource(res, ext_irq->interrupts[index], | |
474 | ext_irq->triggering, ext_irq->polarity, | |
204ebc0a | 475 | ext_irq->sharable, false); |
046d9ce6 RW |
476 | break; |
477 | default: | |
581c19f3 | 478 | res->flags = 0; |
046d9ce6 RW |
479 | return false; |
480 | } | |
481 | ||
482 | return true; | |
483 | } | |
484 | EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); | |
8e345c99 RW |
485 | |
486 | /** | |
487 | * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). | |
488 | * @list: The head of the resource list to free. | |
489 | */ | |
490 | void acpi_dev_free_resource_list(struct list_head *list) | |
491 | { | |
90e97820 | 492 | resource_list_free(list); |
8e345c99 RW |
493 | } |
494 | EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); | |
495 | ||
496 | struct res_proc_context { | |
497 | struct list_head *list; | |
498 | int (*preproc)(struct acpi_resource *, void *); | |
499 | void *preproc_data; | |
500 | int count; | |
501 | int error; | |
502 | }; | |
503 | ||
a49170b5 | 504 | static acpi_status acpi_dev_new_resource_entry(struct resource_win *win, |
8e345c99 RW |
505 | struct res_proc_context *c) |
506 | { | |
90e97820 | 507 | struct resource_entry *rentry; |
8e345c99 | 508 | |
90e97820 | 509 | rentry = resource_list_create_entry(NULL, 0); |
8e345c99 RW |
510 | if (!rentry) { |
511 | c->error = -ENOMEM; | |
512 | return AE_NO_MEMORY; | |
513 | } | |
90e97820 | 514 | *rentry->res = win->res; |
93286f47 | 515 | rentry->offset = win->offset; |
90e97820 | 516 | resource_list_add_tail(rentry, c->list); |
8e345c99 RW |
517 | c->count++; |
518 | return AE_OK; | |
519 | } | |
520 | ||
521 | static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, | |
522 | void *context) | |
523 | { | |
524 | struct res_proc_context *c = context; | |
a49170b5 JL |
525 | struct resource_win win; |
526 | struct resource *res = &win.res; | |
8e345c99 RW |
527 | int i; |
528 | ||
529 | if (c->preproc) { | |
530 | int ret; | |
531 | ||
532 | ret = c->preproc(ares, c->preproc_data); | |
533 | if (ret < 0) { | |
534 | c->error = ret; | |
8a66790b | 535 | return AE_CTRL_TERMINATE; |
8e345c99 RW |
536 | } else if (ret > 0) { |
537 | return AE_OK; | |
538 | } | |
539 | } | |
540 | ||
a49170b5 | 541 | memset(&win, 0, sizeof(win)); |
8e345c99 | 542 | |
a49170b5 JL |
543 | if (acpi_dev_resource_memory(ares, res) |
544 | || acpi_dev_resource_io(ares, res) | |
545 | || acpi_dev_resource_address_space(ares, &win) | |
546 | || acpi_dev_resource_ext_address_space(ares, &win)) | |
547 | return acpi_dev_new_resource_entry(&win, c); | |
8e345c99 | 548 | |
a49170b5 | 549 | for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) { |
8e345c99 RW |
550 | acpi_status status; |
551 | ||
a49170b5 | 552 | status = acpi_dev_new_resource_entry(&win, c); |
8e345c99 RW |
553 | if (ACPI_FAILURE(status)) |
554 | return status; | |
555 | } | |
556 | ||
557 | return AE_OK; | |
558 | } | |
559 | ||
560 | /** | |
561 | * acpi_dev_get_resources - Get current resources of a device. | |
562 | * @adev: ACPI device node to get the resources for. | |
563 | * @list: Head of the resultant list of resources (must be empty). | |
564 | * @preproc: The caller's preprocessing routine. | |
565 | * @preproc_data: Pointer passed to the caller's preprocessing routine. | |
566 | * | |
567 | * Evaluate the _CRS method for the given device node and process its output by | |
568 | * (1) executing the @preproc() rountine provided by the caller, passing the | |
569 | * resource pointer and @preproc_data to it as arguments, for each ACPI resource | |
570 | * returned and (2) converting all of the returned ACPI resources into struct | |
571 | * resource objects if possible. If the return value of @preproc() in step (1) | |
572 | * is different from 0, step (2) is not applied to the given ACPI resource and | |
573 | * if that value is negative, the whole processing is aborted and that value is | |
574 | * returned as the final error code. | |
575 | * | |
576 | * The resultant struct resource objects are put on the list pointed to by | |
90e97820 | 577 | * @list, that must be empty initially, as members of struct resource_entry |
8e345c99 RW |
578 | * objects. Callers of this routine should use %acpi_dev_free_resource_list() to |
579 | * free that list. | |
580 | * | |
581 | * The number of resources in the output list is returned on success, an error | |
582 | * code reflecting the error condition is returned otherwise. | |
583 | */ | |
584 | int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, | |
585 | int (*preproc)(struct acpi_resource *, void *), | |
586 | void *preproc_data) | |
587 | { | |
588 | struct res_proc_context c; | |
8e345c99 RW |
589 | acpi_status status; |
590 | ||
591 | if (!adev || !adev->handle || !list_empty(list)) | |
592 | return -EINVAL; | |
593 | ||
952c63e9 | 594 | if (!acpi_has_method(adev->handle, METHOD_NAME__CRS)) |
8e345c99 RW |
595 | return 0; |
596 | ||
597 | c.list = list; | |
598 | c.preproc = preproc; | |
599 | c.preproc_data = preproc_data; | |
600 | c.count = 0; | |
601 | c.error = 0; | |
602 | status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS, | |
603 | acpi_dev_process_resource, &c); | |
604 | if (ACPI_FAILURE(status)) { | |
605 | acpi_dev_free_resource_list(list); | |
606 | return c.error ? c.error : -EIO; | |
607 | } | |
608 | ||
609 | return c.count; | |
610 | } | |
611 | EXPORT_SYMBOL_GPL(acpi_dev_get_resources); | |
62d1141f JL |
612 | |
613 | /** | |
614 | * acpi_dev_filter_resource_type - Filter ACPI resource according to resource | |
615 | * types | |
616 | * @ares: Input ACPI resource object. | |
617 | * @types: Valid resource types of IORESOURCE_XXX | |
618 | * | |
2c62e849 | 619 | * This is a helper function to support acpi_dev_get_resources(), which filters |
62d1141f JL |
620 | * ACPI resource objects according to resource types. |
621 | */ | |
622 | int acpi_dev_filter_resource_type(struct acpi_resource *ares, | |
623 | unsigned long types) | |
624 | { | |
625 | unsigned long type = 0; | |
626 | ||
627 | switch (ares->type) { | |
628 | case ACPI_RESOURCE_TYPE_MEMORY24: | |
629 | case ACPI_RESOURCE_TYPE_MEMORY32: | |
630 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: | |
631 | type = IORESOURCE_MEM; | |
632 | break; | |
633 | case ACPI_RESOURCE_TYPE_IO: | |
634 | case ACPI_RESOURCE_TYPE_FIXED_IO: | |
635 | type = IORESOURCE_IO; | |
636 | break; | |
637 | case ACPI_RESOURCE_TYPE_IRQ: | |
638 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
639 | type = IORESOURCE_IRQ; | |
640 | break; | |
641 | case ACPI_RESOURCE_TYPE_DMA: | |
642 | case ACPI_RESOURCE_TYPE_FIXED_DMA: | |
643 | type = IORESOURCE_DMA; | |
644 | break; | |
645 | case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: | |
646 | type = IORESOURCE_REG; | |
647 | break; | |
648 | case ACPI_RESOURCE_TYPE_ADDRESS16: | |
649 | case ACPI_RESOURCE_TYPE_ADDRESS32: | |
650 | case ACPI_RESOURCE_TYPE_ADDRESS64: | |
651 | case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: | |
652 | if (ares->data.address.resource_type == ACPI_MEMORY_RANGE) | |
653 | type = IORESOURCE_MEM; | |
654 | else if (ares->data.address.resource_type == ACPI_IO_RANGE) | |
655 | type = IORESOURCE_IO; | |
656 | else if (ares->data.address.resource_type == | |
657 | ACPI_BUS_NUMBER_RANGE) | |
658 | type = IORESOURCE_BUS; | |
659 | break; | |
660 | default: | |
661 | break; | |
662 | } | |
663 | ||
664 | return (type & types) ? 0 : 1; | |
665 | } | |
666 | EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type); |