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