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1da177e4 LT |
1 | /* |
2 | * pci_irq.c - ACPI PCI Interrupt Routing ($Revision: 11 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * Copyright (C) 2002 Dominik Brodowski <devel@brodo.de> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
1da177e4 | 27 | |
391df5dc | 28 | #include <linux/dmi.h> |
1da177e4 LT |
29 | #include <linux/kernel.h> |
30 | #include <linux/module.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/proc_fs.h> | |
34 | #include <linux/spinlock.h> | |
35 | #include <linux/pm.h> | |
36 | #include <linux/pci.h> | |
37 | #include <linux/acpi.h> | |
38 | #include <acpi/acpi_bus.h> | |
39 | #include <acpi/acpi_drivers.h> | |
40 | ||
1da177e4 | 41 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 42 | ACPI_MODULE_NAME("pci_irq"); |
1da177e4 | 43 | |
f748bafa | 44 | struct acpi_prt_entry { |
3604a9f4 | 45 | struct list_head list; |
f748bafa BH |
46 | struct acpi_pci_id id; |
47 | u8 pin; | |
4eaf6db3 BH |
48 | acpi_handle link; |
49 | u32 index; /* GSI, or link _CRS index */ | |
f748bafa BH |
50 | }; |
51 | ||
3604a9f4 | 52 | static LIST_HEAD(acpi_prt_list); |
1da177e4 LT |
53 | static DEFINE_SPINLOCK(acpi_prt_lock); |
54 | ||
cf68b80b BH |
55 | static inline char pin_name(int pin) |
56 | { | |
e64e9db5 | 57 | return 'A' + pin - 1; |
cf68b80b BH |
58 | } |
59 | ||
1da177e4 LT |
60 | /* -------------------------------------------------------------------------- |
61 | PCI IRQ Routing Table (PRT) Support | |
62 | -------------------------------------------------------------------------- */ | |
63 | ||
063563b4 BH |
64 | static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
65 | int pin) | |
1da177e4 | 66 | { |
3604a9f4 | 67 | struct acpi_prt_entry *entry; |
063563b4 BH |
68 | int segment = pci_domain_nr(dev->bus); |
69 | int bus = dev->bus->number; | |
70 | int device = PCI_SLOT(dev->devfn); | |
1da177e4 | 71 | |
1da177e4 | 72 | spin_lock(&acpi_prt_lock); |
3604a9f4 | 73 | list_for_each_entry(entry, &acpi_prt_list, list) { |
4be44fcd LB |
74 | if ((segment == entry->id.segment) |
75 | && (bus == entry->id.bus) | |
76 | && (device == entry->id.device) | |
77 | && (pin == entry->pin)) { | |
1da177e4 | 78 | spin_unlock(&acpi_prt_lock); |
d550d98d | 79 | return entry; |
1da177e4 LT |
80 | } |
81 | } | |
1da177e4 | 82 | spin_unlock(&acpi_prt_lock); |
d550d98d | 83 | return NULL; |
1da177e4 LT |
84 | } |
85 | ||
391df5dc BH |
86 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
87 | static struct dmi_system_id medion_md9580[] = { | |
88 | { | |
89 | .ident = "Medion MD9580-F laptop", | |
90 | .matches = { | |
91 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), | |
92 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), | |
93 | }, | |
94 | }, | |
95 | { } | |
96 | }; | |
97 | ||
98 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ | |
99 | static struct dmi_system_id dell_optiplex[] = { | |
100 | { | |
101 | .ident = "Dell Optiplex GX1", | |
102 | .matches = { | |
103 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
104 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), | |
105 | }, | |
106 | }, | |
107 | { } | |
108 | }; | |
109 | ||
110 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ | |
111 | static struct dmi_system_id hp_t5710[] = { | |
112 | { | |
113 | .ident = "HP t5710", | |
114 | .matches = { | |
115 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
116 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), | |
117 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), | |
118 | }, | |
119 | }, | |
120 | { } | |
121 | }; | |
122 | ||
123 | struct prt_quirk { | |
124 | struct dmi_system_id *system; | |
125 | unsigned int segment; | |
126 | unsigned int bus; | |
127 | unsigned int device; | |
128 | unsigned char pin; | |
129 | char *source; /* according to BIOS */ | |
130 | char *actual_source; | |
131 | }; | |
132 | ||
c458033c BH |
133 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
134 | ||
391df5dc BH |
135 | /* |
136 | * These systems have incorrect _PRT entries. The BIOS claims the PCI | |
137 | * interrupt at the listed segment/bus/device/pin is connected to the first | |
138 | * link device, but it is actually connected to the second. | |
139 | */ | |
140 | static struct prt_quirk prt_quirks[] = { | |
c458033c | 141 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
b97d4803 BH |
142 | "\\_SB_.PCI0.ISA_.LNKA", |
143 | "\\_SB_.PCI0.ISA_.LNKB"}, | |
c458033c | 144 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
391df5dc BH |
145 | "\\_SB_.LNKB", |
146 | "\\_SB_.LNKA"}, | |
c458033c | 147 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
391df5dc BH |
148 | "\\_SB_.PCI0.LNK1", |
149 | "\\_SB_.PCI0.LNK3"}, | |
150 | }; | |
151 | ||
152 | static void | |
153 | do_prt_fixups(struct acpi_prt_entry *entry, struct acpi_pci_routing_table *prt) | |
154 | { | |
155 | int i; | |
156 | struct prt_quirk *quirk; | |
157 | ||
158 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { | |
159 | quirk = &prt_quirks[i]; | |
160 | ||
161 | /* All current quirks involve link devices, not GSIs */ | |
162 | if (!prt->source) | |
163 | continue; | |
164 | ||
165 | if (dmi_check_system(quirk->system) && | |
166 | entry->id.segment == quirk->segment && | |
167 | entry->id.bus == quirk->bus && | |
168 | entry->id.device == quirk->device && | |
c458033c | 169 | entry->pin == quirk->pin && |
391df5dc BH |
170 | !strcmp(prt->source, quirk->source) && |
171 | strlen(prt->source) >= strlen(quirk->actual_source)) { | |
172 | printk(KERN_WARNING PREFIX "firmware reports " | |
c83642d5 | 173 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
391df5dc BH |
174 | "changing to %s\n", |
175 | entry->id.segment, entry->id.bus, | |
cf68b80b | 176 | entry->id.device, pin_name(entry->pin), |
391df5dc BH |
177 | prt->source, quirk->actual_source); |
178 | strcpy(prt->source, quirk->actual_source); | |
179 | } | |
180 | } | |
181 | } | |
182 | ||
1da177e4 | 183 | static int |
4be44fcd LB |
184 | acpi_pci_irq_add_entry(acpi_handle handle, |
185 | int segment, int bus, struct acpi_pci_routing_table *prt) | |
1da177e4 | 186 | { |
3604a9f4 | 187 | struct acpi_prt_entry *entry; |
1da177e4 | 188 | |
36bcbec7 | 189 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
1da177e4 | 190 | if (!entry) |
d550d98d | 191 | return -ENOMEM; |
1da177e4 | 192 | |
e64e9db5 BH |
193 | /* |
194 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses | |
195 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert | |
196 | * it here. | |
197 | */ | |
1da177e4 LT |
198 | entry->id.segment = segment; |
199 | entry->id.bus = bus; | |
200 | entry->id.device = (prt->address >> 16) & 0xFFFF; | |
e64e9db5 | 201 | entry->pin = prt->pin + 1; |
1da177e4 | 202 | |
391df5dc BH |
203 | do_prt_fixups(entry, prt); |
204 | ||
4eaf6db3 BH |
205 | entry->index = prt->source_index; |
206 | ||
1da177e4 LT |
207 | /* |
208 | * Type 1: Dynamic | |
209 | * --------------- | |
210 | * The 'source' field specifies the PCI interrupt link device used to | |
211 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' | |
212 | * indicates which resource descriptor in the resource template (of | |
213 | * the link device) this interrupt is allocated from. | |
214 | * | |
215 | * NOTE: Don't query the Link Device for IRQ information at this time | |
216 | * because Link Device enumeration may not have occurred yet | |
217 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI | |
218 | * namespace). | |
219 | */ | |
4eaf6db3 BH |
220 | if (prt->source[0]) |
221 | acpi_get_handle(handle, prt->source, &entry->link); | |
222 | ||
1da177e4 LT |
223 | /* |
224 | * Type 2: Static | |
225 | * -------------- | |
226 | * The 'source' field is NULL, and the 'source_index' field specifies | |
227 | * the IRQ value, which is hardwired to specific interrupt inputs on | |
228 | * the interrupt controller. | |
229 | */ | |
1da177e4 LT |
230 | |
231 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
21a53283 | 232 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
4be44fcd | 233 | entry->id.segment, entry->id.bus, |
cf68b80b | 234 | entry->id.device, pin_name(entry->pin), |
4eaf6db3 | 235 | prt->source, entry->index)); |
1da177e4 LT |
236 | |
237 | spin_lock(&acpi_prt_lock); | |
3604a9f4 | 238 | list_add_tail(&entry->list, &acpi_prt_list); |
1da177e4 LT |
239 | spin_unlock(&acpi_prt_lock); |
240 | ||
d550d98d | 241 | return 0; |
1da177e4 LT |
242 | } |
243 | ||
4be44fcd | 244 | int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus) |
1da177e4 | 245 | { |
2320ac6c BH |
246 | acpi_status status; |
247 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
248 | struct acpi_pci_routing_table *entry; | |
1da177e4 | 249 | |
2320ac6c BH |
250 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
251 | status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
252 | if (ACPI_FAILURE(status)) | |
253 | return -ENODEV; | |
1da177e4 LT |
254 | |
255 | printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n", | |
2320ac6c | 256 | (char *) buffer.pointer); |
1da177e4 | 257 | |
2320ac6c | 258 | kfree(buffer.pointer); |
1da177e4 | 259 | |
2320ac6c | 260 | buffer.length = ACPI_ALLOCATE_BUFFER; |
1da177e4 | 261 | buffer.pointer = NULL; |
1da177e4 LT |
262 | |
263 | status = acpi_get_irq_routing_table(handle, &buffer); | |
264 | if (ACPI_FAILURE(status)) { | |
a6fc6720 TR |
265 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]", |
266 | acpi_format_exception(status))); | |
1da177e4 | 267 | kfree(buffer.pointer); |
d550d98d | 268 | return -ENODEV; |
1da177e4 LT |
269 | } |
270 | ||
2320ac6c | 271 | entry = buffer.pointer; |
1da177e4 LT |
272 | while (entry && (entry->length > 0)) { |
273 | acpi_pci_irq_add_entry(handle, segment, bus, entry); | |
274 | entry = (struct acpi_pci_routing_table *) | |
4be44fcd | 275 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
276 | } |
277 | ||
2320ac6c | 278 | kfree(buffer.pointer); |
d550d98d | 279 | return 0; |
1da177e4 LT |
280 | } |
281 | ||
4be44fcd | 282 | void acpi_pci_irq_del_prt(int segment, int bus) |
1da177e4 | 283 | { |
3604a9f4 | 284 | struct acpi_prt_entry *entry, *tmp; |
1da177e4 | 285 | |
4be44fcd | 286 | printk(KERN_DEBUG |
21a53283 BH |
287 | "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n", |
288 | segment, bus); | |
1da177e4 | 289 | spin_lock(&acpi_prt_lock); |
3604a9f4 BH |
290 | list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) { |
291 | if (segment == entry->id.segment && bus == entry->id.bus) { | |
292 | list_del(&entry->list); | |
293 | kfree(entry); | |
294 | } | |
1da177e4 LT |
295 | } |
296 | spin_unlock(&acpi_prt_lock); | |
297 | } | |
4be44fcd | 298 | |
1da177e4 LT |
299 | /* -------------------------------------------------------------------------- |
300 | PCI Interrupt Routing Support | |
301 | -------------------------------------------------------------------------- */ | |
87bec66b DSL |
302 | static int |
303 | acpi_pci_allocate_irq(struct acpi_prt_entry *entry, | |
50eca3eb | 304 | int *triggering, int *polarity, char **link) |
87bec66b | 305 | { |
4be44fcd | 306 | int irq; |
87bec66b | 307 | |
87bec66b | 308 | |
4eaf6db3 BH |
309 | if (entry->link) { |
310 | irq = acpi_pci_link_allocate_irq(entry->link, entry->index, | |
311 | triggering, polarity, link); | |
87bec66b | 312 | if (irq < 0) { |
cece9296 LB |
313 | printk(KERN_WARNING PREFIX |
314 | "Invalid IRQ link routing entry\n"); | |
d550d98d | 315 | return -1; |
87bec66b DSL |
316 | } |
317 | } else { | |
4eaf6db3 | 318 | irq = entry->index; |
50eca3eb BM |
319 | *triggering = ACPI_LEVEL_SENSITIVE; |
320 | *polarity = ACPI_ACTIVE_LOW; | |
87bec66b DSL |
321 | } |
322 | ||
c13f889a | 323 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found GSI %d\n", irq)); |
d550d98d | 324 | return irq; |
87bec66b DSL |
325 | } |
326 | ||
327 | static int | |
beba8a64 | 328 | acpi_pci_free_irq(struct acpi_prt_entry *entry) |
87bec66b | 329 | { |
4be44fcd | 330 | int irq; |
87bec66b | 331 | |
4eaf6db3 BH |
332 | if (entry->link) { |
333 | irq = acpi_pci_link_free_irq(entry->link); | |
87bec66b | 334 | } else { |
4eaf6db3 | 335 | irq = entry->index; |
87bec66b | 336 | } |
d550d98d | 337 | return irq; |
87bec66b | 338 | } |
4be44fcd | 339 | |
beba8a64 BH |
340 | static struct acpi_prt_entry * |
341 | acpi_pci_irq_lookup(struct pci_dev *dev, int pin) | |
1da177e4 | 342 | { |
beba8a64 | 343 | struct acpi_prt_entry *entry; |
5697b7ca BH |
344 | struct pci_dev *bridge; |
345 | u8 bridge_pin, orig_pin = pin; | |
1da177e4 | 346 | |
063563b4 | 347 | entry = acpi_pci_irq_find_prt_entry(dev, pin); |
3b1ea18d BH |
348 | if (entry) { |
349 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", | |
1350487e | 350 | pci_name(dev), pin_name(pin))); |
3b1ea18d | 351 | return entry; |
1da177e4 | 352 | } |
4be44fcd | 353 | |
1da177e4 LT |
354 | /* |
355 | * Attempt to derive an IRQ for this device from a parent bridge's | |
356 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). | |
357 | */ | |
ee401363 BH |
358 | bridge = dev->bus->self; |
359 | while (bridge) { | |
360 | pin = (((pin - 1) + PCI_SLOT(dev->devfn)) % 4) + 1; | |
1da177e4 LT |
361 | |
362 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { | |
363 | /* PC card has the same IRQ as its cardbridge */ | |
8015a014 | 364 | bridge_pin = bridge->pin; |
1da177e4 | 365 | if (!bridge_pin) { |
4be44fcd LB |
366 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
367 | "No interrupt pin configured for device %s\n", | |
368 | pci_name(bridge))); | |
beba8a64 | 369 | return NULL; |
1da177e4 | 370 | } |
1da177e4 LT |
371 | pin = bridge_pin; |
372 | } | |
373 | ||
5697b7ca | 374 | entry = acpi_pci_irq_find_prt_entry(bridge, pin); |
3b1ea18d BH |
375 | if (entry) { |
376 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
377 | "Derived GSI for %s INT %c from %s\n", | |
378 | pci_name(dev), pin_name(orig_pin), | |
379 | pci_name(bridge))); | |
380 | return entry; | |
381 | } | |
ee401363 BH |
382 | |
383 | dev = bridge; | |
384 | bridge = dev->bus->self; | |
1da177e4 LT |
385 | } |
386 | ||
3b1ea18d BH |
387 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
388 | pin_name(orig_pin)); | |
389 | return NULL; | |
1da177e4 LT |
390 | } |
391 | ||
392 | /* | |
393 | * acpi_pci_irq_enable | |
394 | * success: return 0 | |
395 | * failure: return < 0 | |
396 | */ | |
397 | ||
4be44fcd | 398 | int acpi_pci_irq_enable(struct pci_dev *dev) |
1da177e4 | 399 | { |
beba8a64 | 400 | struct acpi_prt_entry *entry; |
c13f889a | 401 | int gsi = 0; |
4be44fcd | 402 | u8 pin = 0; |
50eca3eb BM |
403 | int triggering = ACPI_LEVEL_SENSITIVE; |
404 | int polarity = ACPI_ACTIVE_LOW; | |
4be44fcd | 405 | char *link = NULL; |
c83642d5 | 406 | char link_desc[16]; |
4be44fcd | 407 | int rc; |
1da177e4 | 408 | |
1da177e4 | 409 | |
8015a014 | 410 | pin = dev->pin; |
1da177e4 | 411 | if (!pin) { |
4be44fcd LB |
412 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
413 | "No interrupt pin configured for device %s\n", | |
414 | pci_name(dev))); | |
d550d98d | 415 | return 0; |
1da177e4 | 416 | } |
1da177e4 | 417 | |
beba8a64 | 418 | entry = acpi_pci_irq_lookup(dev, pin); |
5697b7ca | 419 | if (!entry) { |
96c2a876 AC |
420 | /* |
421 | * IDE legacy mode controller IRQs are magic. Why do compat | |
422 | * extensions always make such a nasty mess. | |
423 | */ | |
424 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && | |
425 | (dev->class & 0x05) == 0) | |
426 | return 0; | |
427 | } | |
5697b7ca BH |
428 | |
429 | if (entry) | |
430 | gsi = acpi_pci_allocate_irq(entry, &triggering, &polarity, | |
431 | &link); | |
432 | else | |
433 | gsi = -1; | |
434 | ||
1da177e4 LT |
435 | /* |
436 | * No IRQ known to the ACPI subsystem - maybe the BIOS / | |
437 | * driver reported one, then use it. Exit in any case. | |
438 | */ | |
c13f889a | 439 | if (gsi < 0) { |
cf68b80b | 440 | dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin)); |
1da177e4 | 441 | /* Interrupt Line values above 0xF are forbidden */ |
44f8e1a2 | 442 | if (dev->irq > 0 && (dev->irq <= 0xF)) { |
1da177e4 | 443 | printk(" - using IRQ %d\n", dev->irq); |
4be44fcd LB |
444 | acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE, |
445 | ACPI_ACTIVE_LOW); | |
d550d98d | 446 | return 0; |
4be44fcd | 447 | } else { |
1da177e4 | 448 | printk("\n"); |
d550d98d | 449 | return 0; |
1da177e4 | 450 | } |
4be44fcd | 451 | } |
1da177e4 | 452 | |
c13f889a | 453 | rc = acpi_register_gsi(gsi, triggering, polarity); |
349f0d56 | 454 | if (rc < 0) { |
c83642d5 | 455 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
cf68b80b | 456 | pin_name(pin)); |
d550d98d | 457 | return rc; |
349f0d56 KK |
458 | } |
459 | dev->irq = rc; | |
1da177e4 | 460 | |
1da177e4 | 461 | if (link) |
c83642d5 BH |
462 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
463 | else | |
464 | link_desc[0] = '\0'; | |
1da177e4 | 465 | |
c83642d5 | 466 | dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
cf68b80b | 467 | pin_name(pin), link_desc, gsi, |
c83642d5 BH |
468 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", |
469 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); | |
1da177e4 | 470 | |
d550d98d | 471 | return 0; |
1da177e4 | 472 | } |
1da177e4 | 473 | |
87bec66b | 474 | /* FIXME: implement x86/x86_64 version */ |
4be44fcd LB |
475 | void __attribute__ ((weak)) acpi_unregister_gsi(u32 i) |
476 | { | |
477 | } | |
87bec66b | 478 | |
4be44fcd | 479 | void acpi_pci_irq_disable(struct pci_dev *dev) |
1da177e4 | 480 | { |
beba8a64 | 481 | struct acpi_prt_entry *entry; |
4be44fcd LB |
482 | int gsi = 0; |
483 | u8 pin = 0; | |
1da177e4 | 484 | |
1da177e4 | 485 | |
8015a014 | 486 | pin = dev->pin; |
1da177e4 | 487 | if (!pin) |
d550d98d | 488 | return; |
1da177e4 | 489 | |
beba8a64 | 490 | entry = acpi_pci_irq_lookup(dev, pin); |
beba8a64 | 491 | if (!entry) |
d550d98d | 492 | return; |
1da177e4 | 493 | |
beba8a64 BH |
494 | gsi = acpi_pci_free_irq(entry); |
495 | ||
1da177e4 LT |
496 | /* |
497 | * TBD: It might be worth clearing dev->irq by magic constant | |
498 | * (e.g. PCI_UNDEFINED_IRQ). | |
499 | */ | |
500 | ||
cf68b80b | 501 | dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
1da177e4 | 502 | acpi_unregister_gsi(gsi); |
1da177e4 | 503 | } |