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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 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
23 | */ | |
24 | ||
25 | #include <linux/acpi.h> | |
26 | #include <linux/device.h> | |
27 | #include <linux/export.h> | |
28 | #include <linux/ioport.h> | |
8e345c99 | 29 | #include <linux/slab.h> |
046d9ce6 RW |
30 | |
31 | #ifdef CONFIG_X86 | |
32 | #define valid_IRQ(i) (((i) != 0) && ((i) != 2)) | |
33 | #else | |
34 | #define valid_IRQ(i) (true) | |
35 | #endif | |
36 | ||
c420dbd1 | 37 | static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io) |
046d9ce6 | 38 | { |
c420dbd1 | 39 | u64 reslen = end - start + 1; |
046d9ce6 | 40 | |
c420dbd1 TG |
41 | /* |
42 | * CHECKME: len might be required to check versus a minimum | |
43 | * length as well. 1 for io is fine, but for memory it does | |
44 | * not make any sense at all. | |
aa714d28 JL |
45 | * Note: some BIOSes report incorrect length for ACPI address space |
46 | * descriptor, so remove check of 'reslen == len' to avoid regression. | |
c420dbd1 | 47 | */ |
aa714d28 | 48 | if (len && reslen && start <= end) |
c420dbd1 TG |
49 | return true; |
50 | ||
6a239af2 | 51 | pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n", |
c420dbd1 TG |
52 | io ? "io" : "mem", start, end, len); |
53 | ||
54 | return false; | |
55 | } | |
56 | ||
57 | static void acpi_dev_memresource_flags(struct resource *res, u64 len, | |
72e26b0d | 58 | u8 write_protect) |
c420dbd1 TG |
59 | { |
60 | res->flags = IORESOURCE_MEM; | |
61 | ||
62 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, false)) | |
c78b6885 | 63 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 RW |
64 | |
65 | if (write_protect == ACPI_READ_WRITE_MEMORY) | |
c420dbd1 | 66 | res->flags |= IORESOURCE_MEM_WRITEABLE; |
046d9ce6 RW |
67 | } |
68 | ||
69 | static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len, | |
70 | u8 write_protect) | |
71 | { | |
72 | res->start = start; | |
73 | res->end = start + len - 1; | |
72e26b0d | 74 | acpi_dev_memresource_flags(res, len, write_protect); |
046d9ce6 RW |
75 | } |
76 | ||
77 | /** | |
78 | * acpi_dev_resource_memory - Extract ACPI memory resource information. | |
79 | * @ares: Input ACPI resource object. | |
80 | * @res: Output generic resource object. | |
81 | * | |
82 | * Check if the given ACPI resource object represents a memory resource and | |
83 | * if that's the case, use the information in it to populate the generic | |
84 | * resource object pointed to by @res. | |
581c19f3 JL |
85 | * |
86 | * Return: | |
87 | * 1) false with res->flags setting to zero: not the expected resource type | |
88 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
89 | * 3) true: valid assigned resource | |
046d9ce6 RW |
90 | */ |
91 | bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res) | |
92 | { | |
93 | struct acpi_resource_memory24 *memory24; | |
94 | struct acpi_resource_memory32 *memory32; | |
95 | struct acpi_resource_fixed_memory32 *fixed_memory32; | |
96 | ||
97 | switch (ares->type) { | |
98 | case ACPI_RESOURCE_TYPE_MEMORY24: | |
99 | memory24 = &ares->data.memory24; | |
8515f936 JL |
100 | acpi_dev_get_memresource(res, memory24->minimum << 8, |
101 | memory24->address_length << 8, | |
046d9ce6 RW |
102 | memory24->write_protect); |
103 | break; | |
104 | case ACPI_RESOURCE_TYPE_MEMORY32: | |
105 | memory32 = &ares->data.memory32; | |
106 | acpi_dev_get_memresource(res, memory32->minimum, | |
107 | memory32->address_length, | |
108 | memory32->write_protect); | |
109 | break; | |
110 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: | |
111 | fixed_memory32 = &ares->data.fixed_memory32; | |
112 | acpi_dev_get_memresource(res, fixed_memory32->address, | |
113 | fixed_memory32->address_length, | |
114 | fixed_memory32->write_protect); | |
115 | break; | |
116 | default: | |
581c19f3 | 117 | res->flags = 0; |
046d9ce6 RW |
118 | return false; |
119 | } | |
c420dbd1 TG |
120 | |
121 | return !(res->flags & IORESOURCE_DISABLED); | |
046d9ce6 RW |
122 | } |
123 | EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); | |
124 | ||
1d0420f1 | 125 | static void acpi_dev_ioresource_flags(struct resource *res, u64 len, |
72e26b0d | 126 | u8 io_decode) |
046d9ce6 | 127 | { |
1d0420f1 | 128 | res->flags = IORESOURCE_IO; |
046d9ce6 | 129 | |
1d0420f1 | 130 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, true)) |
c78b6885 | 131 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
1d0420f1 TG |
132 | |
133 | if (res->end >= 0x10003) | |
c78b6885 | 134 | res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 | 135 | |
1d0420f1 TG |
136 | if (io_decode == ACPI_DECODE_16) |
137 | res->flags |= IORESOURCE_IO_16BIT_ADDR; | |
046d9ce6 RW |
138 | } |
139 | ||
140 | static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, | |
141 | u8 io_decode) | |
142 | { | |
046d9ce6 | 143 | res->start = start; |
1d0420f1 | 144 | res->end = start + len - 1; |
72e26b0d | 145 | acpi_dev_ioresource_flags(res, len, io_decode); |
046d9ce6 RW |
146 | } |
147 | ||
148 | /** | |
149 | * acpi_dev_resource_io - Extract ACPI I/O resource information. | |
150 | * @ares: Input ACPI resource object. | |
151 | * @res: Output generic resource object. | |
152 | * | |
153 | * Check if the given ACPI resource object represents an I/O resource and | |
154 | * if that's the case, use the information in it to populate the generic | |
155 | * resource object pointed to by @res. | |
581c19f3 JL |
156 | * |
157 | * Return: | |
158 | * 1) false with res->flags setting to zero: not the expected resource type | |
159 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
160 | * 3) true: valid assigned resource | |
046d9ce6 RW |
161 | */ |
162 | bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res) | |
163 | { | |
164 | struct acpi_resource_io *io; | |
165 | struct acpi_resource_fixed_io *fixed_io; | |
166 | ||
167 | switch (ares->type) { | |
168 | case ACPI_RESOURCE_TYPE_IO: | |
169 | io = &ares->data.io; | |
170 | acpi_dev_get_ioresource(res, io->minimum, | |
171 | io->address_length, | |
172 | io->io_decode); | |
173 | break; | |
174 | case ACPI_RESOURCE_TYPE_FIXED_IO: | |
175 | fixed_io = &ares->data.fixed_io; | |
176 | acpi_dev_get_ioresource(res, fixed_io->address, | |
177 | fixed_io->address_length, | |
178 | ACPI_DECODE_10); | |
179 | break; | |
180 | default: | |
581c19f3 | 181 | res->flags = 0; |
046d9ce6 RW |
182 | return false; |
183 | } | |
1d0420f1 TG |
184 | |
185 | return !(res->flags & IORESOURCE_DISABLED); | |
046d9ce6 RW |
186 | } |
187 | EXPORT_SYMBOL_GPL(acpi_dev_resource_io); | |
188 | ||
a49170b5 | 189 | static bool acpi_decode_space(struct resource_win *win, |
eb76d55e TG |
190 | struct acpi_resource_address *addr, |
191 | struct acpi_address64_attribute *attr) | |
192 | { | |
193 | u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16; | |
eb76d55e TG |
194 | bool wp = addr->info.mem.write_protect; |
195 | u64 len = attr->address_length; | |
a49170b5 | 196 | struct resource *res = &win->res; |
eb76d55e | 197 | |
a274019f JL |
198 | /* |
199 | * Filter out invalid descriptor according to ACPI Spec 5.0, section | |
200 | * 6.4.3.5 Address Space Resource Descriptors. | |
201 | */ | |
202 | if ((addr->min_address_fixed != addr->max_address_fixed && len) || | |
203 | (addr->min_address_fixed && addr->max_address_fixed && !len)) | |
204 | pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n", | |
205 | addr->min_address_fixed, addr->max_address_fixed, len); | |
206 | ||
eb76d55e TG |
207 | res->start = attr->minimum; |
208 | res->end = attr->maximum; | |
209 | ||
2ea3d266 JL |
210 | /* |
211 | * For bridges that translate addresses across the bridge, | |
212 | * translation_offset is the offset that must be added to the | |
213 | * address on the secondary side to obtain the address on the | |
214 | * primary side. Non-bridge devices must list 0 for all Address | |
215 | * Translation offset bits. | |
216 | */ | |
217 | if (addr->producer_consumer == ACPI_PRODUCER) { | |
218 | res->start += attr->translation_offset; | |
219 | res->end += attr->translation_offset; | |
220 | } else if (attr->translation_offset) { | |
221 | pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n", | |
222 | attr->translation_offset); | |
223 | } | |
224 | ||
eb76d55e TG |
225 | switch (addr->resource_type) { |
226 | case ACPI_MEMORY_RANGE: | |
72e26b0d | 227 | acpi_dev_memresource_flags(res, len, wp); |
eb76d55e TG |
228 | break; |
229 | case ACPI_IO_RANGE: | |
72e26b0d | 230 | acpi_dev_ioresource_flags(res, len, iodec); |
eb76d55e TG |
231 | break; |
232 | case ACPI_BUS_NUMBER_RANGE: | |
233 | res->flags = IORESOURCE_BUS; | |
234 | break; | |
235 | default: | |
236 | return false; | |
237 | } | |
238 | ||
a49170b5 JL |
239 | win->offset = attr->translation_offset; |
240 | ||
72e26b0d TG |
241 | if (addr->producer_consumer == ACPI_PRODUCER) |
242 | res->flags |= IORESOURCE_WINDOW; | |
fcb29bbc TG |
243 | |
244 | if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY) | |
245 | res->flags |= IORESOURCE_PREFETCH; | |
72e26b0d | 246 | |
eb76d55e TG |
247 | return !(res->flags & IORESOURCE_DISABLED); |
248 | } | |
249 | ||
046d9ce6 RW |
250 | /** |
251 | * acpi_dev_resource_address_space - Extract ACPI address space information. | |
252 | * @ares: Input ACPI resource object. | |
a49170b5 | 253 | * @win: Output generic resource object. |
046d9ce6 RW |
254 | * |
255 | * Check if the given ACPI resource object represents an address space resource | |
256 | * and if that's the case, use the information in it to populate the generic | |
a49170b5 | 257 | * resource object pointed to by @win. |
581c19f3 JL |
258 | * |
259 | * Return: | |
a49170b5 JL |
260 | * 1) false with win->res.flags setting to zero: not the expected resource type |
261 | * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned | |
262 | * resource | |
581c19f3 | 263 | * 3) true: valid assigned resource |
046d9ce6 RW |
264 | */ |
265 | bool acpi_dev_resource_address_space(struct acpi_resource *ares, | |
a49170b5 | 266 | struct resource_win *win) |
046d9ce6 | 267 | { |
046d9ce6 | 268 | struct acpi_resource_address64 addr; |
046d9ce6 | 269 | |
a49170b5 | 270 | win->res.flags = 0; |
eb76d55e | 271 | if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr))) |
6658c739 | 272 | return false; |
046d9ce6 | 273 | |
a49170b5 | 274 | return acpi_decode_space(win, (struct acpi_resource_address *)&addr, |
eb76d55e | 275 | &addr.address); |
046d9ce6 RW |
276 | } |
277 | EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space); | |
278 | ||
279 | /** | |
280 | * acpi_dev_resource_ext_address_space - Extract ACPI address space information. | |
281 | * @ares: Input ACPI resource object. | |
a49170b5 | 282 | * @win: Output generic resource object. |
046d9ce6 RW |
283 | * |
284 | * Check if the given ACPI resource object represents an extended address space | |
285 | * resource and if that's the case, use the information in it to populate the | |
a49170b5 | 286 | * generic resource object pointed to by @win. |
581c19f3 JL |
287 | * |
288 | * Return: | |
a49170b5 JL |
289 | * 1) false with win->res.flags setting to zero: not the expected resource type |
290 | * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned | |
291 | * resource | |
581c19f3 | 292 | * 3) true: valid assigned resource |
046d9ce6 RW |
293 | */ |
294 | bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, | |
a49170b5 | 295 | struct resource_win *win) |
046d9ce6 RW |
296 | { |
297 | struct acpi_resource_extended_address64 *ext_addr; | |
046d9ce6 | 298 | |
a49170b5 | 299 | win->res.flags = 0; |
046d9ce6 RW |
300 | if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) |
301 | return false; | |
302 | ||
303 | ext_addr = &ares->data.ext_address64; | |
304 | ||
a49170b5 | 305 | return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr, |
eb76d55e | 306 | &ext_addr->address); |
046d9ce6 RW |
307 | } |
308 | EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space); | |
309 | ||
310 | /** | |
311 | * acpi_dev_irq_flags - Determine IRQ resource flags. | |
312 | * @triggering: Triggering type as provided by ACPI. | |
313 | * @polarity: Interrupt polarity as provided by ACPI. | |
314 | * @shareable: Whether or not the interrupt is shareable. | |
315 | */ | |
316 | unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable) | |
317 | { | |
318 | unsigned long flags; | |
319 | ||
320 | if (triggering == ACPI_LEVEL_SENSITIVE) | |
321 | flags = polarity == ACPI_ACTIVE_LOW ? | |
322 | IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL; | |
323 | else | |
324 | flags = polarity == ACPI_ACTIVE_LOW ? | |
325 | IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE; | |
326 | ||
327 | if (shareable == ACPI_SHARED) | |
328 | flags |= IORESOURCE_IRQ_SHAREABLE; | |
329 | ||
330 | return flags | IORESOURCE_IRQ; | |
331 | } | |
332 | EXPORT_SYMBOL_GPL(acpi_dev_irq_flags); | |
333 | ||
334 | static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi) | |
335 | { | |
336 | res->start = gsi; | |
337 | res->end = gsi; | |
c78b6885 | 338 | res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET; |
046d9ce6 RW |
339 | } |
340 | ||
341 | static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, | |
204ebc0a MW |
342 | u8 triggering, u8 polarity, u8 shareable, |
343 | bool legacy) | |
046d9ce6 RW |
344 | { |
345 | int irq, p, t; | |
346 | ||
347 | if (!valid_IRQ(gsi)) { | |
348 | acpi_dev_irqresource_disabled(res, gsi); | |
349 | return; | |
350 | } | |
351 | ||
352 | /* | |
353 | * In IO-APIC mode, use overrided attribute. Two reasons: | |
354 | * 1. BIOS bug in DSDT | |
355 | * 2. BIOS uses IO-APIC mode Interrupt Source Override | |
204ebc0a MW |
356 | * |
357 | * We do this only if we are dealing with IRQ() or IRQNoFlags() | |
358 | * resource (the legacy ISA resources). With modern ACPI 5 devices | |
359 | * using extended IRQ descriptors we take the IRQ configuration | |
360 | * from _CRS directly. | |
046d9ce6 | 361 | */ |
204ebc0a | 362 | if (legacy && !acpi_get_override_irq(gsi, &t, &p)) { |
046d9ce6 RW |
363 | u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; |
364 | u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; | |
365 | ||
366 | if (triggering != trig || polarity != pol) { | |
367 | pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi, | |
204ebc0a | 368 | t ? "level" : "edge", p ? "low" : "high"); |
046d9ce6 RW |
369 | triggering = trig; |
370 | polarity = pol; | |
371 | } | |
372 | } | |
373 | ||
374 | res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); | |
375 | irq = acpi_register_gsi(NULL, gsi, triggering, polarity); | |
376 | if (irq >= 0) { | |
377 | res->start = irq; | |
378 | res->end = irq; | |
379 | } else { | |
380 | acpi_dev_irqresource_disabled(res, gsi); | |
381 | } | |
382 | } | |
383 | ||
384 | /** | |
385 | * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. | |
386 | * @ares: Input ACPI resource object. | |
387 | * @index: Index into the array of GSIs represented by the resource. | |
388 | * @res: Output generic resource object. | |
389 | * | |
390 | * Check if the given ACPI resource object represents an interrupt resource | |
391 | * and @index does not exceed the resource's interrupt count (true is returned | |
392 | * in that case regardless of the results of the other checks)). If that's the | |
393 | * case, register the GSI corresponding to @index from the array of interrupts | |
394 | * represented by the resource and populate the generic resource object pointed | |
395 | * to by @res accordingly. If the registration of the GSI is not successful, | |
396 | * IORESOURCE_DISABLED will be set it that object's flags. | |
581c19f3 JL |
397 | * |
398 | * Return: | |
399 | * 1) false with res->flags setting to zero: not the expected resource type | |
400 | * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource | |
401 | * 3) true: valid assigned resource | |
046d9ce6 RW |
402 | */ |
403 | bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, | |
404 | struct resource *res) | |
405 | { | |
406 | struct acpi_resource_irq *irq; | |
407 | struct acpi_resource_extended_irq *ext_irq; | |
408 | ||
409 | switch (ares->type) { | |
410 | case ACPI_RESOURCE_TYPE_IRQ: | |
411 | /* | |
412 | * Per spec, only one interrupt per descriptor is allowed in | |
413 | * _CRS, but some firmware violates this, so parse them all. | |
414 | */ | |
415 | irq = &ares->data.irq; | |
416 | if (index >= irq->interrupt_count) { | |
417 | acpi_dev_irqresource_disabled(res, 0); | |
418 | return false; | |
419 | } | |
420 | acpi_dev_get_irqresource(res, irq->interrupts[index], | |
421 | irq->triggering, irq->polarity, | |
204ebc0a | 422 | irq->sharable, true); |
046d9ce6 RW |
423 | break; |
424 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
425 | ext_irq = &ares->data.extended_irq; | |
426 | if (index >= ext_irq->interrupt_count) { | |
427 | acpi_dev_irqresource_disabled(res, 0); | |
428 | return false; | |
429 | } | |
430 | acpi_dev_get_irqresource(res, ext_irq->interrupts[index], | |
431 | ext_irq->triggering, ext_irq->polarity, | |
204ebc0a | 432 | ext_irq->sharable, false); |
046d9ce6 RW |
433 | break; |
434 | default: | |
581c19f3 | 435 | res->flags = 0; |
046d9ce6 RW |
436 | return false; |
437 | } | |
438 | ||
439 | return true; | |
440 | } | |
441 | EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); | |
8e345c99 RW |
442 | |
443 | /** | |
444 | * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). | |
445 | * @list: The head of the resource list to free. | |
446 | */ | |
447 | void acpi_dev_free_resource_list(struct list_head *list) | |
448 | { | |
90e97820 | 449 | resource_list_free(list); |
8e345c99 RW |
450 | } |
451 | EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); | |
452 | ||
453 | struct res_proc_context { | |
454 | struct list_head *list; | |
455 | int (*preproc)(struct acpi_resource *, void *); | |
456 | void *preproc_data; | |
457 | int count; | |
458 | int error; | |
459 | }; | |
460 | ||
a49170b5 | 461 | static acpi_status acpi_dev_new_resource_entry(struct resource_win *win, |
8e345c99 RW |
462 | struct res_proc_context *c) |
463 | { | |
90e97820 | 464 | struct resource_entry *rentry; |
8e345c99 | 465 | |
90e97820 | 466 | rentry = resource_list_create_entry(NULL, 0); |
8e345c99 RW |
467 | if (!rentry) { |
468 | c->error = -ENOMEM; | |
469 | return AE_NO_MEMORY; | |
470 | } | |
90e97820 | 471 | *rentry->res = win->res; |
93286f47 | 472 | rentry->offset = win->offset; |
90e97820 | 473 | resource_list_add_tail(rentry, c->list); |
8e345c99 RW |
474 | c->count++; |
475 | return AE_OK; | |
476 | } | |
477 | ||
478 | static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, | |
479 | void *context) | |
480 | { | |
481 | struct res_proc_context *c = context; | |
a49170b5 JL |
482 | struct resource_win win; |
483 | struct resource *res = &win.res; | |
8e345c99 RW |
484 | int i; |
485 | ||
486 | if (c->preproc) { | |
487 | int ret; | |
488 | ||
489 | ret = c->preproc(ares, c->preproc_data); | |
490 | if (ret < 0) { | |
491 | c->error = ret; | |
8a66790b | 492 | return AE_CTRL_TERMINATE; |
8e345c99 RW |
493 | } else if (ret > 0) { |
494 | return AE_OK; | |
495 | } | |
496 | } | |
497 | ||
a49170b5 | 498 | memset(&win, 0, sizeof(win)); |
8e345c99 | 499 | |
a49170b5 JL |
500 | if (acpi_dev_resource_memory(ares, res) |
501 | || acpi_dev_resource_io(ares, res) | |
502 | || acpi_dev_resource_address_space(ares, &win) | |
503 | || acpi_dev_resource_ext_address_space(ares, &win)) | |
504 | return acpi_dev_new_resource_entry(&win, c); | |
8e345c99 | 505 | |
a49170b5 | 506 | for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) { |
8e345c99 RW |
507 | acpi_status status; |
508 | ||
a49170b5 | 509 | status = acpi_dev_new_resource_entry(&win, c); |
8e345c99 RW |
510 | if (ACPI_FAILURE(status)) |
511 | return status; | |
512 | } | |
513 | ||
514 | return AE_OK; | |
515 | } | |
516 | ||
517 | /** | |
518 | * acpi_dev_get_resources - Get current resources of a device. | |
519 | * @adev: ACPI device node to get the resources for. | |
520 | * @list: Head of the resultant list of resources (must be empty). | |
521 | * @preproc: The caller's preprocessing routine. | |
522 | * @preproc_data: Pointer passed to the caller's preprocessing routine. | |
523 | * | |
524 | * Evaluate the _CRS method for the given device node and process its output by | |
525 | * (1) executing the @preproc() rountine provided by the caller, passing the | |
526 | * resource pointer and @preproc_data to it as arguments, for each ACPI resource | |
527 | * returned and (2) converting all of the returned ACPI resources into struct | |
528 | * resource objects if possible. If the return value of @preproc() in step (1) | |
529 | * is different from 0, step (2) is not applied to the given ACPI resource and | |
530 | * if that value is negative, the whole processing is aborted and that value is | |
531 | * returned as the final error code. | |
532 | * | |
533 | * The resultant struct resource objects are put on the list pointed to by | |
90e97820 | 534 | * @list, that must be empty initially, as members of struct resource_entry |
8e345c99 RW |
535 | * objects. Callers of this routine should use %acpi_dev_free_resource_list() to |
536 | * free that list. | |
537 | * | |
538 | * The number of resources in the output list is returned on success, an error | |
539 | * code reflecting the error condition is returned otherwise. | |
540 | */ | |
541 | int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, | |
542 | int (*preproc)(struct acpi_resource *, void *), | |
543 | void *preproc_data) | |
544 | { | |
545 | struct res_proc_context c; | |
8e345c99 RW |
546 | acpi_status status; |
547 | ||
548 | if (!adev || !adev->handle || !list_empty(list)) | |
549 | return -EINVAL; | |
550 | ||
952c63e9 | 551 | if (!acpi_has_method(adev->handle, METHOD_NAME__CRS)) |
8e345c99 RW |
552 | return 0; |
553 | ||
554 | c.list = list; | |
555 | c.preproc = preproc; | |
556 | c.preproc_data = preproc_data; | |
557 | c.count = 0; | |
558 | c.error = 0; | |
559 | status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS, | |
560 | acpi_dev_process_resource, &c); | |
561 | if (ACPI_FAILURE(status)) { | |
562 | acpi_dev_free_resource_list(list); | |
563 | return c.error ? c.error : -EIO; | |
564 | } | |
565 | ||
566 | return c.count; | |
567 | } | |
568 | EXPORT_SYMBOL_GPL(acpi_dev_get_resources); | |
62d1141f JL |
569 | |
570 | /** | |
571 | * acpi_dev_filter_resource_type - Filter ACPI resource according to resource | |
572 | * types | |
573 | * @ares: Input ACPI resource object. | |
574 | * @types: Valid resource types of IORESOURCE_XXX | |
575 | * | |
2c62e849 | 576 | * This is a helper function to support acpi_dev_get_resources(), which filters |
62d1141f JL |
577 | * ACPI resource objects according to resource types. |
578 | */ | |
579 | int acpi_dev_filter_resource_type(struct acpi_resource *ares, | |
580 | unsigned long types) | |
581 | { | |
582 | unsigned long type = 0; | |
583 | ||
584 | switch (ares->type) { | |
585 | case ACPI_RESOURCE_TYPE_MEMORY24: | |
586 | case ACPI_RESOURCE_TYPE_MEMORY32: | |
587 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: | |
588 | type = IORESOURCE_MEM; | |
589 | break; | |
590 | case ACPI_RESOURCE_TYPE_IO: | |
591 | case ACPI_RESOURCE_TYPE_FIXED_IO: | |
592 | type = IORESOURCE_IO; | |
593 | break; | |
594 | case ACPI_RESOURCE_TYPE_IRQ: | |
595 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
596 | type = IORESOURCE_IRQ; | |
597 | break; | |
598 | case ACPI_RESOURCE_TYPE_DMA: | |
599 | case ACPI_RESOURCE_TYPE_FIXED_DMA: | |
600 | type = IORESOURCE_DMA; | |
601 | break; | |
602 | case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: | |
603 | type = IORESOURCE_REG; | |
604 | break; | |
605 | case ACPI_RESOURCE_TYPE_ADDRESS16: | |
606 | case ACPI_RESOURCE_TYPE_ADDRESS32: | |
607 | case ACPI_RESOURCE_TYPE_ADDRESS64: | |
608 | case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: | |
609 | if (ares->data.address.resource_type == ACPI_MEMORY_RANGE) | |
610 | type = IORESOURCE_MEM; | |
611 | else if (ares->data.address.resource_type == ACPI_IO_RANGE) | |
612 | type = IORESOURCE_IO; | |
613 | else if (ares->data.address.resource_type == | |
614 | ACPI_BUS_NUMBER_RANGE) | |
615 | type = IORESOURCE_BUS; | |
616 | break; | |
617 | default: | |
618 | break; | |
619 | } | |
620 | ||
621 | return (type & types) ? 0 : 1; | |
622 | } | |
623 | EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type); |