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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> | |
39488b04 BH |
7 | * (c) Copyright 2008 Hewlett-Packard Development Company, L.P. |
8 | * Bjorn Helgaas <bjorn.helgaas@hp.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or (at | |
15 | * your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
1da177e4 LT |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
23 | */ | |
24 | ||
1da177e4 | 25 | |
391df5dc | 26 | #include <linux/dmi.h> |
1da177e4 LT |
27 | #include <linux/kernel.h> |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
1da177e4 LT |
31 | #include <linux/spinlock.h> |
32 | #include <linux/pm.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/acpi.h> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1da177e4 | 36 | |
a192a958 LB |
37 | #define PREFIX "ACPI: " |
38 | ||
1da177e4 | 39 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 40 | ACPI_MODULE_NAME("pci_irq"); |
1da177e4 | 41 | |
f748bafa | 42 | struct acpi_prt_entry { |
f748bafa BH |
43 | struct acpi_pci_id id; |
44 | u8 pin; | |
4eaf6db3 BH |
45 | acpi_handle link; |
46 | u32 index; /* GSI, or link _CRS index */ | |
f748bafa BH |
47 | }; |
48 | ||
cf68b80b BH |
49 | static inline char pin_name(int pin) |
50 | { | |
e64e9db5 | 51 | return 'A' + pin - 1; |
cf68b80b BH |
52 | } |
53 | ||
1da177e4 LT |
54 | /* -------------------------------------------------------------------------- |
55 | PCI IRQ Routing Table (PRT) Support | |
56 | -------------------------------------------------------------------------- */ | |
57 | ||
391df5dc | 58 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
609d4bc9 | 59 | static const struct dmi_system_id medion_md9580[] = { |
391df5dc BH |
60 | { |
61 | .ident = "Medion MD9580-F laptop", | |
62 | .matches = { | |
63 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), | |
64 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), | |
65 | }, | |
66 | }, | |
67 | { } | |
68 | }; | |
69 | ||
70 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ | |
609d4bc9 | 71 | static const struct dmi_system_id dell_optiplex[] = { |
391df5dc BH |
72 | { |
73 | .ident = "Dell Optiplex GX1", | |
74 | .matches = { | |
75 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
76 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), | |
77 | }, | |
78 | }, | |
79 | { } | |
80 | }; | |
81 | ||
82 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ | |
609d4bc9 | 83 | static const struct dmi_system_id hp_t5710[] = { |
391df5dc BH |
84 | { |
85 | .ident = "HP t5710", | |
86 | .matches = { | |
87 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
88 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), | |
89 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), | |
90 | }, | |
91 | }, | |
92 | { } | |
93 | }; | |
94 | ||
95 | struct prt_quirk { | |
609d4bc9 | 96 | const struct dmi_system_id *system; |
391df5dc BH |
97 | unsigned int segment; |
98 | unsigned int bus; | |
99 | unsigned int device; | |
100 | unsigned char pin; | |
609d4bc9 JB |
101 | const char *source; /* according to BIOS */ |
102 | const char *actual_source; | |
391df5dc BH |
103 | }; |
104 | ||
c458033c BH |
105 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
106 | ||
391df5dc BH |
107 | /* |
108 | * These systems have incorrect _PRT entries. The BIOS claims the PCI | |
109 | * interrupt at the listed segment/bus/device/pin is connected to the first | |
110 | * link device, but it is actually connected to the second. | |
111 | */ | |
609d4bc9 | 112 | static const struct prt_quirk prt_quirks[] = { |
c458033c | 113 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
b97d4803 BH |
114 | "\\_SB_.PCI0.ISA_.LNKA", |
115 | "\\_SB_.PCI0.ISA_.LNKB"}, | |
c458033c | 116 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
391df5dc BH |
117 | "\\_SB_.LNKB", |
118 | "\\_SB_.LNKA"}, | |
c458033c | 119 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
391df5dc BH |
120 | "\\_SB_.PCI0.LNK1", |
121 | "\\_SB_.PCI0.LNK3"}, | |
122 | }; | |
123 | ||
3f0f3c27 BH |
124 | static void do_prt_fixups(struct acpi_prt_entry *entry, |
125 | struct acpi_pci_routing_table *prt) | |
391df5dc BH |
126 | { |
127 | int i; | |
609d4bc9 | 128 | const struct prt_quirk *quirk; |
391df5dc BH |
129 | |
130 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { | |
131 | quirk = &prt_quirks[i]; | |
132 | ||
133 | /* All current quirks involve link devices, not GSIs */ | |
134 | if (!prt->source) | |
135 | continue; | |
136 | ||
137 | if (dmi_check_system(quirk->system) && | |
138 | entry->id.segment == quirk->segment && | |
139 | entry->id.bus == quirk->bus && | |
140 | entry->id.device == quirk->device && | |
c458033c | 141 | entry->pin == quirk->pin && |
391df5dc BH |
142 | !strcmp(prt->source, quirk->source) && |
143 | strlen(prt->source) >= strlen(quirk->actual_source)) { | |
144 | printk(KERN_WARNING PREFIX "firmware reports " | |
c83642d5 | 145 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
391df5dc BH |
146 | "changing to %s\n", |
147 | entry->id.segment, entry->id.bus, | |
cf68b80b | 148 | entry->id.device, pin_name(entry->pin), |
391df5dc BH |
149 | prt->source, quirk->actual_source); |
150 | strcpy(prt->source, quirk->actual_source); | |
151 | } | |
152 | } | |
153 | } | |
154 | ||
181380b7 YL |
155 | static int acpi_pci_irq_check_entry(acpi_handle handle, struct pci_dev *dev, |
156 | int pin, struct acpi_pci_routing_table *prt, | |
157 | struct acpi_prt_entry **entry_ptr) | |
1da177e4 | 158 | { |
181380b7 YL |
159 | int segment = pci_domain_nr(dev->bus); |
160 | int bus = dev->bus->number; | |
917bfd93 | 161 | int device = pci_ari_enabled(dev->bus) ? 0 : PCI_SLOT(dev->devfn); |
3604a9f4 | 162 | struct acpi_prt_entry *entry; |
1da177e4 | 163 | |
181380b7 YL |
164 | if (((prt->address >> 16) & 0xffff) != device || |
165 | prt->pin + 1 != pin) | |
166 | return -ENODEV; | |
167 | ||
36bcbec7 | 168 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
1da177e4 | 169 | if (!entry) |
d550d98d | 170 | return -ENOMEM; |
1da177e4 | 171 | |
e64e9db5 BH |
172 | /* |
173 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses | |
174 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert | |
175 | * it here. | |
176 | */ | |
79c44122 BH |
177 | entry->id.segment = segment; |
178 | entry->id.bus = bus; | |
1da177e4 | 179 | entry->id.device = (prt->address >> 16) & 0xFFFF; |
e64e9db5 | 180 | entry->pin = prt->pin + 1; |
1da177e4 | 181 | |
391df5dc BH |
182 | do_prt_fixups(entry, prt); |
183 | ||
4eaf6db3 BH |
184 | entry->index = prt->source_index; |
185 | ||
1da177e4 LT |
186 | /* |
187 | * Type 1: Dynamic | |
188 | * --------------- | |
189 | * The 'source' field specifies the PCI interrupt link device used to | |
190 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' | |
191 | * indicates which resource descriptor in the resource template (of | |
192 | * the link device) this interrupt is allocated from. | |
193 | * | |
194 | * NOTE: Don't query the Link Device for IRQ information at this time | |
195 | * because Link Device enumeration may not have occurred yet | |
196 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI | |
197 | * namespace). | |
198 | */ | |
4eaf6db3 BH |
199 | if (prt->source[0]) |
200 | acpi_get_handle(handle, prt->source, &entry->link); | |
201 | ||
1da177e4 LT |
202 | /* |
203 | * Type 2: Static | |
204 | * -------------- | |
205 | * The 'source' field is NULL, and the 'source_index' field specifies | |
206 | * the IRQ value, which is hardwired to specific interrupt inputs on | |
207 | * the interrupt controller. | |
208 | */ | |
1da177e4 LT |
209 | |
210 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
21a53283 | 211 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
4be44fcd | 212 | entry->id.segment, entry->id.bus, |
cf68b80b | 213 | entry->id.device, pin_name(entry->pin), |
4eaf6db3 | 214 | prt->source, entry->index)); |
1da177e4 | 215 | |
181380b7 | 216 | *entry_ptr = entry; |
1da177e4 | 217 | |
d550d98d | 218 | return 0; |
1da177e4 LT |
219 | } |
220 | ||
181380b7 YL |
221 | static int acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
222 | int pin, struct acpi_prt_entry **entry_ptr) | |
1da177e4 | 223 | { |
2320ac6c BH |
224 | acpi_status status; |
225 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
226 | struct acpi_pci_routing_table *entry; | |
181380b7 | 227 | acpi_handle handle = NULL; |
1da177e4 | 228 | |
181380b7 YL |
229 | if (dev->bus->bridge) |
230 | handle = ACPI_HANDLE(dev->bus->bridge); | |
1da177e4 | 231 | |
181380b7 YL |
232 | if (!handle) |
233 | return -ENODEV; | |
1da177e4 | 234 | |
181380b7 | 235 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
1da177e4 LT |
236 | status = acpi_get_irq_routing_table(handle, &buffer); |
237 | if (ACPI_FAILURE(status)) { | |
1da177e4 | 238 | kfree(buffer.pointer); |
d550d98d | 239 | return -ENODEV; |
1da177e4 LT |
240 | } |
241 | ||
2320ac6c | 242 | entry = buffer.pointer; |
1da177e4 | 243 | while (entry && (entry->length > 0)) { |
181380b7 YL |
244 | if (!acpi_pci_irq_check_entry(handle, dev, pin, |
245 | entry, entry_ptr)) | |
246 | break; | |
1da177e4 | 247 | entry = (struct acpi_pci_routing_table *) |
4be44fcd | 248 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
249 | } |
250 | ||
2320ac6c | 251 | kfree(buffer.pointer); |
d550d98d | 252 | return 0; |
1da177e4 LT |
253 | } |
254 | ||
1da177e4 LT |
255 | /* -------------------------------------------------------------------------- |
256 | PCI Interrupt Routing Support | |
257 | -------------------------------------------------------------------------- */ | |
d7f6169a SA |
258 | #ifdef CONFIG_X86_IO_APIC |
259 | extern int noioapicquirk; | |
260 | extern int noioapicreroute; | |
261 | ||
262 | static int bridge_has_boot_interrupt_variant(struct pci_bus *bus) | |
263 | { | |
264 | struct pci_bus *bus_it; | |
265 | ||
266 | for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) { | |
267 | if (!bus_it->self) | |
268 | return 0; | |
269 | if (bus_it->self->irq_reroute_variant) | |
270 | return bus_it->self->irq_reroute_variant; | |
271 | } | |
272 | return 0; | |
273 | } | |
274 | ||
275 | /* | |
276 | * Some chipsets (e.g. Intel 6700PXH) generate a legacy INTx when the IRQ | |
277 | * entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does | |
278 | * during interrupt handling). When this INTx generation cannot be disabled, | |
279 | * we reroute these interrupts to their legacy equivalent to get rid of | |
280 | * spurious interrupts. | |
281 | */ | |
282 | static int acpi_reroute_boot_interrupt(struct pci_dev *dev, | |
283 | struct acpi_prt_entry *entry) | |
284 | { | |
285 | if (noioapicquirk || noioapicreroute) { | |
286 | return 0; | |
287 | } else { | |
288 | switch (bridge_has_boot_interrupt_variant(dev->bus)) { | |
289 | case 0: | |
290 | /* no rerouting necessary */ | |
291 | return 0; | |
292 | case INTEL_IRQ_REROUTE_VARIANT: | |
293 | /* | |
294 | * Remap according to INTx routing table in 6700PXH | |
295 | * specs, intel order number 302628-002, section | |
296 | * 2.15.2. Other chipsets (80332, ...) have the same | |
297 | * mapping and are handled here as well. | |
298 | */ | |
299 | dev_info(&dev->dev, "PCI IRQ %d -> rerouted to legacy " | |
300 | "IRQ %d\n", entry->index, | |
301 | (entry->index % 4) + 16); | |
302 | entry->index = (entry->index % 4) + 16; | |
303 | return 1; | |
304 | default: | |
305 | dev_warn(&dev->dev, "Cannot reroute IRQ %d to legacy " | |
306 | "IRQ: unknown mapping\n", entry->index); | |
307 | return -1; | |
308 | } | |
309 | } | |
310 | } | |
311 | #endif /* CONFIG_X86_IO_APIC */ | |
312 | ||
3f0f3c27 | 313 | static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
1da177e4 | 314 | { |
181380b7 | 315 | struct acpi_prt_entry *entry = NULL; |
5697b7ca BH |
316 | struct pci_dev *bridge; |
317 | u8 bridge_pin, orig_pin = pin; | |
181380b7 | 318 | int ret; |
1da177e4 | 319 | |
181380b7 YL |
320 | ret = acpi_pci_irq_find_prt_entry(dev, pin, &entry); |
321 | if (!ret && entry) { | |
d7f6169a SA |
322 | #ifdef CONFIG_X86_IO_APIC |
323 | acpi_reroute_boot_interrupt(dev, entry); | |
324 | #endif /* CONFIG_X86_IO_APIC */ | |
3b1ea18d | 325 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", |
1350487e | 326 | pci_name(dev), pin_name(pin))); |
3b1ea18d | 327 | return entry; |
1da177e4 | 328 | } |
4be44fcd | 329 | |
181380b7 | 330 | /* |
1da177e4 LT |
331 | * Attempt to derive an IRQ for this device from a parent bridge's |
332 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). | |
333 | */ | |
ee401363 BH |
334 | bridge = dev->bus->self; |
335 | while (bridge) { | |
c686d141 | 336 | pin = pci_swizzle_interrupt_pin(dev, pin); |
1da177e4 LT |
337 | |
338 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { | |
339 | /* PC card has the same IRQ as its cardbridge */ | |
8015a014 | 340 | bridge_pin = bridge->pin; |
1da177e4 | 341 | if (!bridge_pin) { |
4be44fcd LB |
342 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
343 | "No interrupt pin configured for device %s\n", | |
344 | pci_name(bridge))); | |
beba8a64 | 345 | return NULL; |
1da177e4 | 346 | } |
1da177e4 LT |
347 | pin = bridge_pin; |
348 | } | |
349 | ||
181380b7 YL |
350 | ret = acpi_pci_irq_find_prt_entry(bridge, pin, &entry); |
351 | if (!ret && entry) { | |
3b1ea18d BH |
352 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
353 | "Derived GSI for %s INT %c from %s\n", | |
354 | pci_name(dev), pin_name(orig_pin), | |
355 | pci_name(bridge))); | |
356 | return entry; | |
357 | } | |
ee401363 BH |
358 | |
359 | dev = bridge; | |
360 | bridge = dev->bus->self; | |
1da177e4 LT |
361 | } |
362 | ||
3b1ea18d BH |
363 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
364 | pin_name(orig_pin)); | |
365 | return NULL; | |
1da177e4 LT |
366 | } |
367 | ||
c1aaae67 TN |
368 | #if IS_ENABLED(CONFIG_ISA) || IS_ENABLED(CONFIG_EISA) |
369 | static int acpi_isa_register_gsi(struct pci_dev *dev) | |
370 | { | |
371 | u32 dev_gsi; | |
372 | ||
373 | /* Interrupt Line values above 0xF are forbidden */ | |
374 | if (dev->irq > 0 && (dev->irq <= 0xF) && | |
5ebc7603 | 375 | acpi_isa_irq_available(dev->irq) && |
c1aaae67 TN |
376 | (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) { |
377 | dev_warn(&dev->dev, "PCI INT %c: no GSI - using ISA IRQ %d\n", | |
378 | pin_name(dev->pin), dev->irq); | |
379 | acpi_register_gsi(&dev->dev, dev_gsi, | |
380 | ACPI_LEVEL_SENSITIVE, | |
381 | ACPI_ACTIVE_LOW); | |
382 | return 0; | |
383 | } | |
384 | return -EINVAL; | |
385 | } | |
386 | #else | |
387 | static inline int acpi_isa_register_gsi(struct pci_dev *dev) | |
388 | { | |
389 | return -ENODEV; | |
390 | } | |
391 | #endif | |
392 | ||
4be44fcd | 393 | int acpi_pci_irq_enable(struct pci_dev *dev) |
1da177e4 | 394 | { |
beba8a64 | 395 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
396 | int gsi; |
397 | u8 pin; | |
50eca3eb BM |
398 | int triggering = ACPI_LEVEL_SENSITIVE; |
399 | int polarity = ACPI_ACTIVE_LOW; | |
4be44fcd | 400 | char *link = NULL; |
c83642d5 | 401 | char link_desc[16]; |
4be44fcd | 402 | int rc; |
1da177e4 | 403 | |
8015a014 | 404 | pin = dev->pin; |
1da177e4 | 405 | if (!pin) { |
4be44fcd LB |
406 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
407 | "No interrupt pin configured for device %s\n", | |
408 | pci_name(dev))); | |
d550d98d | 409 | return 0; |
1da177e4 | 410 | } |
1da177e4 | 411 | |
811a4e6f | 412 | if (pci_has_managed_irq(dev)) |
cffe0a2b JL |
413 | return 0; |
414 | ||
beba8a64 | 415 | entry = acpi_pci_irq_lookup(dev, pin); |
5697b7ca | 416 | if (!entry) { |
96c2a876 AC |
417 | /* |
418 | * IDE legacy mode controller IRQs are magic. Why do compat | |
419 | * extensions always make such a nasty mess. | |
420 | */ | |
421 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && | |
422 | (dev->class & 0x05) == 0) | |
423 | return 0; | |
424 | } | |
5697b7ca | 425 | |
74f82af1 BH |
426 | if (entry) { |
427 | if (entry->link) | |
428 | gsi = acpi_pci_link_allocate_irq(entry->link, | |
429 | entry->index, | |
430 | &triggering, &polarity, | |
431 | &link); | |
432 | else | |
433 | gsi = entry->index; | |
434 | } else | |
5697b7ca BH |
435 | gsi = -1; |
436 | ||
1da177e4 LT |
437 | /* |
438 | * No IRQ known to the ACPI subsystem - maybe the BIOS / | |
439 | * driver reported one, then use it. Exit in any case. | |
440 | */ | |
c13f889a | 441 | if (gsi < 0) { |
c1aaae67 | 442 | if (acpi_isa_register_gsi(dev)) |
66fd3835 JP |
443 | dev_warn(&dev->dev, "PCI INT %c: no GSI\n", |
444 | pin_name(pin)); | |
181380b7 | 445 | |
b685f3b1 | 446 | kfree(entry); |
66fd3835 | 447 | return 0; |
4be44fcd | 448 | } |
1da177e4 | 449 | |
a2f809b0 | 450 | rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity); |
349f0d56 | 451 | if (rc < 0) { |
c83642d5 | 452 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
cf68b80b | 453 | pin_name(pin)); |
181380b7 | 454 | kfree(entry); |
d550d98d | 455 | return rc; |
349f0d56 | 456 | } |
811a4e6f | 457 | pci_set_managed_irq(dev, rc); |
1da177e4 | 458 | |
1da177e4 | 459 | if (link) |
c83642d5 BH |
460 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
461 | else | |
462 | link_desc[0] = '\0'; | |
1da177e4 | 463 | |
85b8582d VP |
464 | dev_dbg(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
465 | pin_name(pin), link_desc, gsi, | |
466 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", | |
467 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); | |
1da177e4 | 468 | |
181380b7 | 469 | kfree(entry); |
d550d98d | 470 | return 0; |
1da177e4 | 471 | } |
1da177e4 | 472 | |
4be44fcd | 473 | void acpi_pci_irq_disable(struct pci_dev *dev) |
1da177e4 | 474 | { |
beba8a64 | 475 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
476 | int gsi; |
477 | u8 pin; | |
1da177e4 | 478 | |
8015a014 | 479 | pin = dev->pin; |
811a4e6f | 480 | if (!pin || !pci_has_managed_irq(dev)) |
d550d98d | 481 | return; |
1da177e4 | 482 | |
beba8a64 | 483 | entry = acpi_pci_irq_lookup(dev, pin); |
beba8a64 | 484 | if (!entry) |
d550d98d | 485 | return; |
1da177e4 | 486 | |
74f82af1 BH |
487 | if (entry->link) |
488 | gsi = acpi_pci_link_free_irq(entry->link); | |
489 | else | |
490 | gsi = entry->index; | |
beba8a64 | 491 | |
181380b7 YL |
492 | kfree(entry); |
493 | ||
1da177e4 LT |
494 | /* |
495 | * TBD: It might be worth clearing dev->irq by magic constant | |
496 | * (e.g. PCI_UNDEFINED_IRQ). | |
497 | */ | |
498 | ||
85b8582d | 499 | dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
cffe0a2b | 500 | if (gsi >= 0) { |
6a38fa0e | 501 | acpi_unregister_gsi(gsi); |
811a4e6f | 502 | pci_reset_managed_irq(dev); |
cffe0a2b | 503 | } |
1da177e4 | 504 | } |