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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> |
e237a551 | 36 | #include <linux/interrupt.h> |
1da177e4 | 37 | |
a192a958 LB |
38 | #define PREFIX "ACPI: " |
39 | ||
1da177e4 | 40 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 41 | ACPI_MODULE_NAME("pci_irq"); |
1da177e4 | 42 | |
f748bafa | 43 | struct acpi_prt_entry { |
f748bafa BH |
44 | struct acpi_pci_id id; |
45 | u8 pin; | |
4eaf6db3 BH |
46 | acpi_handle link; |
47 | u32 index; /* GSI, or link _CRS index */ | |
f748bafa BH |
48 | }; |
49 | ||
cf68b80b BH |
50 | static inline char pin_name(int pin) |
51 | { | |
e64e9db5 | 52 | return 'A' + pin - 1; |
cf68b80b BH |
53 | } |
54 | ||
1da177e4 LT |
55 | /* -------------------------------------------------------------------------- |
56 | PCI IRQ Routing Table (PRT) Support | |
57 | -------------------------------------------------------------------------- */ | |
58 | ||
391df5dc | 59 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
609d4bc9 | 60 | static const struct dmi_system_id medion_md9580[] = { |
391df5dc BH |
61 | { |
62 | .ident = "Medion MD9580-F laptop", | |
63 | .matches = { | |
64 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), | |
65 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), | |
66 | }, | |
67 | }, | |
68 | { } | |
69 | }; | |
70 | ||
71 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ | |
609d4bc9 | 72 | static const struct dmi_system_id dell_optiplex[] = { |
391df5dc BH |
73 | { |
74 | .ident = "Dell Optiplex GX1", | |
75 | .matches = { | |
76 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
77 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), | |
78 | }, | |
79 | }, | |
80 | { } | |
81 | }; | |
82 | ||
83 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ | |
609d4bc9 | 84 | static const struct dmi_system_id hp_t5710[] = { |
391df5dc BH |
85 | { |
86 | .ident = "HP t5710", | |
87 | .matches = { | |
88 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
89 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), | |
90 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), | |
91 | }, | |
92 | }, | |
93 | { } | |
94 | }; | |
95 | ||
96 | struct prt_quirk { | |
609d4bc9 | 97 | const struct dmi_system_id *system; |
391df5dc BH |
98 | unsigned int segment; |
99 | unsigned int bus; | |
100 | unsigned int device; | |
101 | unsigned char pin; | |
609d4bc9 JB |
102 | const char *source; /* according to BIOS */ |
103 | const char *actual_source; | |
391df5dc BH |
104 | }; |
105 | ||
c458033c BH |
106 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
107 | ||
391df5dc BH |
108 | /* |
109 | * These systems have incorrect _PRT entries. The BIOS claims the PCI | |
110 | * interrupt at the listed segment/bus/device/pin is connected to the first | |
111 | * link device, but it is actually connected to the second. | |
112 | */ | |
609d4bc9 | 113 | static const struct prt_quirk prt_quirks[] = { |
c458033c | 114 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
b97d4803 BH |
115 | "\\_SB_.PCI0.ISA_.LNKA", |
116 | "\\_SB_.PCI0.ISA_.LNKB"}, | |
c458033c | 117 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
391df5dc BH |
118 | "\\_SB_.LNKB", |
119 | "\\_SB_.LNKA"}, | |
c458033c | 120 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
391df5dc BH |
121 | "\\_SB_.PCI0.LNK1", |
122 | "\\_SB_.PCI0.LNK3"}, | |
123 | }; | |
124 | ||
3f0f3c27 BH |
125 | static void do_prt_fixups(struct acpi_prt_entry *entry, |
126 | struct acpi_pci_routing_table *prt) | |
391df5dc BH |
127 | { |
128 | int i; | |
609d4bc9 | 129 | const struct prt_quirk *quirk; |
391df5dc BH |
130 | |
131 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { | |
132 | quirk = &prt_quirks[i]; | |
133 | ||
134 | /* All current quirks involve link devices, not GSIs */ | |
391df5dc BH |
135 | if (dmi_check_system(quirk->system) && |
136 | entry->id.segment == quirk->segment && | |
137 | entry->id.bus == quirk->bus && | |
138 | entry->id.device == quirk->device && | |
c458033c | 139 | entry->pin == quirk->pin && |
391df5dc BH |
140 | !strcmp(prt->source, quirk->source) && |
141 | strlen(prt->source) >= strlen(quirk->actual_source)) { | |
142 | printk(KERN_WARNING PREFIX "firmware reports " | |
c83642d5 | 143 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
391df5dc BH |
144 | "changing to %s\n", |
145 | entry->id.segment, entry->id.bus, | |
cf68b80b | 146 | entry->id.device, pin_name(entry->pin), |
391df5dc BH |
147 | prt->source, quirk->actual_source); |
148 | strcpy(prt->source, quirk->actual_source); | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
181380b7 YL |
153 | static int acpi_pci_irq_check_entry(acpi_handle handle, struct pci_dev *dev, |
154 | int pin, struct acpi_pci_routing_table *prt, | |
155 | struct acpi_prt_entry **entry_ptr) | |
1da177e4 | 156 | { |
181380b7 YL |
157 | int segment = pci_domain_nr(dev->bus); |
158 | int bus = dev->bus->number; | |
917bfd93 | 159 | int device = pci_ari_enabled(dev->bus) ? 0 : PCI_SLOT(dev->devfn); |
3604a9f4 | 160 | struct acpi_prt_entry *entry; |
1da177e4 | 161 | |
181380b7 YL |
162 | if (((prt->address >> 16) & 0xffff) != device || |
163 | prt->pin + 1 != pin) | |
164 | return -ENODEV; | |
165 | ||
36bcbec7 | 166 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
1da177e4 | 167 | if (!entry) |
d550d98d | 168 | return -ENOMEM; |
1da177e4 | 169 | |
e64e9db5 BH |
170 | /* |
171 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses | |
172 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert | |
173 | * it here. | |
174 | */ | |
79c44122 BH |
175 | entry->id.segment = segment; |
176 | entry->id.bus = bus; | |
1da177e4 | 177 | entry->id.device = (prt->address >> 16) & 0xFFFF; |
e64e9db5 | 178 | entry->pin = prt->pin + 1; |
1da177e4 | 179 | |
391df5dc BH |
180 | do_prt_fixups(entry, prt); |
181 | ||
4eaf6db3 BH |
182 | entry->index = prt->source_index; |
183 | ||
1da177e4 LT |
184 | /* |
185 | * Type 1: Dynamic | |
186 | * --------------- | |
187 | * The 'source' field specifies the PCI interrupt link device used to | |
188 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' | |
189 | * indicates which resource descriptor in the resource template (of | |
190 | * the link device) this interrupt is allocated from. | |
191 | * | |
192 | * NOTE: Don't query the Link Device for IRQ information at this time | |
193 | * because Link Device enumeration may not have occurred yet | |
194 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI | |
195 | * namespace). | |
196 | */ | |
4eaf6db3 BH |
197 | if (prt->source[0]) |
198 | acpi_get_handle(handle, prt->source, &entry->link); | |
199 | ||
1da177e4 LT |
200 | /* |
201 | * Type 2: Static | |
202 | * -------------- | |
203 | * The 'source' field is NULL, and the 'source_index' field specifies | |
204 | * the IRQ value, which is hardwired to specific interrupt inputs on | |
205 | * the interrupt controller. | |
206 | */ | |
1da177e4 LT |
207 | |
208 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
21a53283 | 209 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
4be44fcd | 210 | entry->id.segment, entry->id.bus, |
cf68b80b | 211 | entry->id.device, pin_name(entry->pin), |
4eaf6db3 | 212 | prt->source, entry->index)); |
1da177e4 | 213 | |
181380b7 | 214 | *entry_ptr = entry; |
1da177e4 | 215 | |
d550d98d | 216 | return 0; |
1da177e4 LT |
217 | } |
218 | ||
181380b7 YL |
219 | static int acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
220 | int pin, struct acpi_prt_entry **entry_ptr) | |
1da177e4 | 221 | { |
2320ac6c BH |
222 | acpi_status status; |
223 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
224 | struct acpi_pci_routing_table *entry; | |
181380b7 | 225 | acpi_handle handle = NULL; |
1da177e4 | 226 | |
181380b7 YL |
227 | if (dev->bus->bridge) |
228 | handle = ACPI_HANDLE(dev->bus->bridge); | |
1da177e4 | 229 | |
181380b7 YL |
230 | if (!handle) |
231 | return -ENODEV; | |
1da177e4 | 232 | |
181380b7 | 233 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
1da177e4 LT |
234 | status = acpi_get_irq_routing_table(handle, &buffer); |
235 | if (ACPI_FAILURE(status)) { | |
1da177e4 | 236 | kfree(buffer.pointer); |
d550d98d | 237 | return -ENODEV; |
1da177e4 LT |
238 | } |
239 | ||
2320ac6c | 240 | entry = buffer.pointer; |
1da177e4 | 241 | while (entry && (entry->length > 0)) { |
181380b7 YL |
242 | if (!acpi_pci_irq_check_entry(handle, dev, pin, |
243 | entry, entry_ptr)) | |
244 | break; | |
1da177e4 | 245 | entry = (struct acpi_pci_routing_table *) |
4be44fcd | 246 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
247 | } |
248 | ||
2320ac6c | 249 | kfree(buffer.pointer); |
d550d98d | 250 | return 0; |
1da177e4 LT |
251 | } |
252 | ||
1da177e4 LT |
253 | /* -------------------------------------------------------------------------- |
254 | PCI Interrupt Routing Support | |
255 | -------------------------------------------------------------------------- */ | |
d7f6169a SA |
256 | #ifdef CONFIG_X86_IO_APIC |
257 | extern int noioapicquirk; | |
258 | extern int noioapicreroute; | |
259 | ||
260 | static int bridge_has_boot_interrupt_variant(struct pci_bus *bus) | |
261 | { | |
262 | struct pci_bus *bus_it; | |
263 | ||
264 | for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) { | |
265 | if (!bus_it->self) | |
266 | return 0; | |
267 | if (bus_it->self->irq_reroute_variant) | |
268 | return bus_it->self->irq_reroute_variant; | |
269 | } | |
270 | return 0; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Some chipsets (e.g. Intel 6700PXH) generate a legacy INTx when the IRQ | |
275 | * entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does | |
276 | * during interrupt handling). When this INTx generation cannot be disabled, | |
277 | * we reroute these interrupts to their legacy equivalent to get rid of | |
278 | * spurious interrupts. | |
279 | */ | |
280 | static int acpi_reroute_boot_interrupt(struct pci_dev *dev, | |
281 | struct acpi_prt_entry *entry) | |
282 | { | |
283 | if (noioapicquirk || noioapicreroute) { | |
284 | return 0; | |
285 | } else { | |
286 | switch (bridge_has_boot_interrupt_variant(dev->bus)) { | |
287 | case 0: | |
288 | /* no rerouting necessary */ | |
289 | return 0; | |
290 | case INTEL_IRQ_REROUTE_VARIANT: | |
291 | /* | |
292 | * Remap according to INTx routing table in 6700PXH | |
293 | * specs, intel order number 302628-002, section | |
294 | * 2.15.2. Other chipsets (80332, ...) have the same | |
295 | * mapping and are handled here as well. | |
296 | */ | |
297 | dev_info(&dev->dev, "PCI IRQ %d -> rerouted to legacy " | |
298 | "IRQ %d\n", entry->index, | |
299 | (entry->index % 4) + 16); | |
300 | entry->index = (entry->index % 4) + 16; | |
301 | return 1; | |
302 | default: | |
303 | dev_warn(&dev->dev, "Cannot reroute IRQ %d to legacy " | |
304 | "IRQ: unknown mapping\n", entry->index); | |
305 | return -1; | |
306 | } | |
307 | } | |
308 | } | |
309 | #endif /* CONFIG_X86_IO_APIC */ | |
310 | ||
3f0f3c27 | 311 | static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
1da177e4 | 312 | { |
181380b7 | 313 | struct acpi_prt_entry *entry = NULL; |
5697b7ca BH |
314 | struct pci_dev *bridge; |
315 | u8 bridge_pin, orig_pin = pin; | |
181380b7 | 316 | int ret; |
1da177e4 | 317 | |
181380b7 YL |
318 | ret = acpi_pci_irq_find_prt_entry(dev, pin, &entry); |
319 | if (!ret && entry) { | |
d7f6169a SA |
320 | #ifdef CONFIG_X86_IO_APIC |
321 | acpi_reroute_boot_interrupt(dev, entry); | |
322 | #endif /* CONFIG_X86_IO_APIC */ | |
3b1ea18d | 323 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", |
1350487e | 324 | pci_name(dev), pin_name(pin))); |
3b1ea18d | 325 | return entry; |
1da177e4 | 326 | } |
4be44fcd | 327 | |
181380b7 | 328 | /* |
1da177e4 LT |
329 | * Attempt to derive an IRQ for this device from a parent bridge's |
330 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). | |
331 | */ | |
ee401363 BH |
332 | bridge = dev->bus->self; |
333 | while (bridge) { | |
c686d141 | 334 | pin = pci_swizzle_interrupt_pin(dev, pin); |
1da177e4 LT |
335 | |
336 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { | |
337 | /* PC card has the same IRQ as its cardbridge */ | |
8015a014 | 338 | bridge_pin = bridge->pin; |
1da177e4 | 339 | if (!bridge_pin) { |
4be44fcd LB |
340 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
341 | "No interrupt pin configured for device %s\n", | |
342 | pci_name(bridge))); | |
beba8a64 | 343 | return NULL; |
1da177e4 | 344 | } |
1da177e4 LT |
345 | pin = bridge_pin; |
346 | } | |
347 | ||
181380b7 YL |
348 | ret = acpi_pci_irq_find_prt_entry(bridge, pin, &entry); |
349 | if (!ret && entry) { | |
3b1ea18d BH |
350 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
351 | "Derived GSI for %s INT %c from %s\n", | |
352 | pci_name(dev), pin_name(orig_pin), | |
353 | pci_name(bridge))); | |
354 | return entry; | |
355 | } | |
ee401363 BH |
356 | |
357 | dev = bridge; | |
358 | bridge = dev->bus->self; | |
1da177e4 LT |
359 | } |
360 | ||
3b1ea18d BH |
361 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
362 | pin_name(orig_pin)); | |
363 | return NULL; | |
1da177e4 LT |
364 | } |
365 | ||
c1aaae67 TN |
366 | #if IS_ENABLED(CONFIG_ISA) || IS_ENABLED(CONFIG_EISA) |
367 | static int acpi_isa_register_gsi(struct pci_dev *dev) | |
368 | { | |
369 | u32 dev_gsi; | |
370 | ||
371 | /* Interrupt Line values above 0xF are forbidden */ | |
372 | if (dev->irq > 0 && (dev->irq <= 0xF) && | |
5ebc7603 | 373 | acpi_isa_irq_available(dev->irq) && |
c1aaae67 TN |
374 | (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) { |
375 | dev_warn(&dev->dev, "PCI INT %c: no GSI - using ISA IRQ %d\n", | |
376 | pin_name(dev->pin), dev->irq); | |
377 | acpi_register_gsi(&dev->dev, dev_gsi, | |
378 | ACPI_LEVEL_SENSITIVE, | |
379 | ACPI_ACTIVE_LOW); | |
380 | return 0; | |
381 | } | |
382 | return -EINVAL; | |
383 | } | |
384 | #else | |
385 | static inline int acpi_isa_register_gsi(struct pci_dev *dev) | |
386 | { | |
387 | return -ENODEV; | |
388 | } | |
389 | #endif | |
390 | ||
e237a551 CF |
391 | static inline bool acpi_pci_irq_valid(struct pci_dev *dev, u8 pin) |
392 | { | |
393 | #ifdef CONFIG_X86 | |
394 | /* | |
395 | * On x86 irq line 0xff means "unknown" or "no connection" | |
396 | * (PCI 3.0, Section 6.2.4, footnote on page 223). | |
397 | */ | |
398 | if (dev->irq == 0xff) { | |
399 | dev->irq = IRQ_NOTCONNECTED; | |
400 | dev_warn(&dev->dev, "PCI INT %c: not connected\n", | |
401 | pin_name(pin)); | |
402 | return false; | |
403 | } | |
404 | #endif | |
405 | return true; | |
406 | } | |
407 | ||
4be44fcd | 408 | int acpi_pci_irq_enable(struct pci_dev *dev) |
1da177e4 | 409 | { |
beba8a64 | 410 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
411 | int gsi; |
412 | u8 pin; | |
50eca3eb BM |
413 | int triggering = ACPI_LEVEL_SENSITIVE; |
414 | int polarity = ACPI_ACTIVE_LOW; | |
4be44fcd | 415 | char *link = NULL; |
c83642d5 | 416 | char link_desc[16]; |
4be44fcd | 417 | int rc; |
1da177e4 | 418 | |
8015a014 | 419 | pin = dev->pin; |
1da177e4 | 420 | if (!pin) { |
4be44fcd LB |
421 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
422 | "No interrupt pin configured for device %s\n", | |
423 | pci_name(dev))); | |
d550d98d | 424 | return 0; |
1da177e4 | 425 | } |
1da177e4 | 426 | |
67b4eab9 | 427 | if (dev->irq_managed && dev->irq > 0) |
cffe0a2b JL |
428 | return 0; |
429 | ||
beba8a64 | 430 | entry = acpi_pci_irq_lookup(dev, pin); |
5697b7ca | 431 | if (!entry) { |
96c2a876 AC |
432 | /* |
433 | * IDE legacy mode controller IRQs are magic. Why do compat | |
434 | * extensions always make such a nasty mess. | |
435 | */ | |
436 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && | |
437 | (dev->class & 0x05) == 0) | |
438 | return 0; | |
439 | } | |
5697b7ca | 440 | |
74f82af1 BH |
441 | if (entry) { |
442 | if (entry->link) | |
443 | gsi = acpi_pci_link_allocate_irq(entry->link, | |
444 | entry->index, | |
445 | &triggering, &polarity, | |
446 | &link); | |
447 | else | |
448 | gsi = entry->index; | |
449 | } else | |
5697b7ca BH |
450 | gsi = -1; |
451 | ||
c13f889a | 452 | if (gsi < 0) { |
e237a551 CF |
453 | /* |
454 | * No IRQ known to the ACPI subsystem - maybe the BIOS / | |
455 | * driver reported one, then use it. Exit in any case. | |
456 | */ | |
457 | if (!acpi_pci_irq_valid(dev, pin)) | |
458 | return 0; | |
459 | ||
c1aaae67 | 460 | if (acpi_isa_register_gsi(dev)) |
66fd3835 JP |
461 | dev_warn(&dev->dev, "PCI INT %c: no GSI\n", |
462 | pin_name(pin)); | |
181380b7 | 463 | |
b685f3b1 | 464 | kfree(entry); |
66fd3835 | 465 | return 0; |
4be44fcd | 466 | } |
1da177e4 | 467 | |
a2f809b0 | 468 | rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity); |
349f0d56 | 469 | if (rc < 0) { |
c83642d5 | 470 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
cf68b80b | 471 | pin_name(pin)); |
181380b7 | 472 | kfree(entry); |
d550d98d | 473 | return rc; |
349f0d56 | 474 | } |
67b4eab9 BH |
475 | dev->irq = rc; |
476 | dev->irq_managed = 1; | |
1da177e4 | 477 | |
1da177e4 | 478 | if (link) |
c83642d5 BH |
479 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
480 | else | |
481 | link_desc[0] = '\0'; | |
1da177e4 | 482 | |
85b8582d VP |
483 | dev_dbg(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
484 | pin_name(pin), link_desc, gsi, | |
485 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", | |
486 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); | |
1da177e4 | 487 | |
181380b7 | 488 | kfree(entry); |
d550d98d | 489 | return 0; |
1da177e4 | 490 | } |
1da177e4 | 491 | |
4be44fcd | 492 | void acpi_pci_irq_disable(struct pci_dev *dev) |
1da177e4 | 493 | { |
beba8a64 | 494 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
495 | int gsi; |
496 | u8 pin; | |
1da177e4 | 497 | |
8015a014 | 498 | pin = dev->pin; |
67b4eab9 | 499 | if (!pin || !dev->irq_managed || dev->irq <= 0) |
d550d98d | 500 | return; |
1da177e4 | 501 | |
6c777e87 BH |
502 | /* Keep IOAPIC pin configuration when suspending */ |
503 | if (dev->dev.power.is_prepared) | |
504 | return; | |
505 | #ifdef CONFIG_PM | |
506 | if (dev->dev.power.runtime_status == RPM_SUSPENDING) | |
507 | return; | |
508 | #endif | |
509 | ||
beba8a64 | 510 | entry = acpi_pci_irq_lookup(dev, pin); |
beba8a64 | 511 | if (!entry) |
d550d98d | 512 | return; |
1da177e4 | 513 | |
74f82af1 BH |
514 | if (entry->link) |
515 | gsi = acpi_pci_link_free_irq(entry->link); | |
516 | else | |
517 | gsi = entry->index; | |
beba8a64 | 518 | |
181380b7 YL |
519 | kfree(entry); |
520 | ||
1da177e4 LT |
521 | /* |
522 | * TBD: It might be worth clearing dev->irq by magic constant | |
523 | * (e.g. PCI_UNDEFINED_IRQ). | |
524 | */ | |
525 | ||
85b8582d | 526 | dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
cffe0a2b | 527 | if (gsi >= 0) { |
6a38fa0e | 528 | acpi_unregister_gsi(gsi); |
67b4eab9 | 529 | dev->irq_managed = 0; |
cffe0a2b | 530 | } |
1da177e4 | 531 | } |