Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * pci_irq.c - ACPI PCI Interrupt Routing ($Revision: 11 $) | |
4 | * | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
7 | * Copyright (C) 2002 Dominik Brodowski <devel@brodo.de> | |
39488b04 BH |
8 | * (c) Copyright 2008 Hewlett-Packard Development Company, L.P. |
9 | * Bjorn Helgaas <bjorn.helgaas@hp.com> | |
1da177e4 LT |
10 | */ |
11 | ||
bf5144a6 | 12 | #define pr_fmt(fmt) "ACPI: PCI: " fmt |
1da177e4 | 13 | |
391df5dc | 14 | #include <linux/dmi.h> |
1da177e4 LT |
15 | #include <linux/kernel.h> |
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/types.h> | |
1da177e4 LT |
19 | #include <linux/spinlock.h> |
20 | #include <linux/pm.h> | |
21 | #include <linux/pci.h> | |
22 | #include <linux/acpi.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
e237a551 | 24 | #include <linux/interrupt.h> |
1da177e4 | 25 | |
f748bafa | 26 | struct acpi_prt_entry { |
f748bafa BH |
27 | struct acpi_pci_id id; |
28 | u8 pin; | |
4eaf6db3 BH |
29 | acpi_handle link; |
30 | u32 index; /* GSI, or link _CRS index */ | |
f748bafa BH |
31 | }; |
32 | ||
cf68b80b BH |
33 | static inline char pin_name(int pin) |
34 | { | |
e64e9db5 | 35 | return 'A' + pin - 1; |
cf68b80b BH |
36 | } |
37 | ||
1da177e4 LT |
38 | /* -------------------------------------------------------------------------- |
39 | PCI IRQ Routing Table (PRT) Support | |
40 | -------------------------------------------------------------------------- */ | |
41 | ||
391df5dc | 42 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
609d4bc9 | 43 | static const struct dmi_system_id medion_md9580[] = { |
391df5dc BH |
44 | { |
45 | .ident = "Medion MD9580-F laptop", | |
46 | .matches = { | |
47 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), | |
48 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), | |
49 | }, | |
50 | }, | |
51 | { } | |
52 | }; | |
53 | ||
54 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ | |
609d4bc9 | 55 | static const struct dmi_system_id dell_optiplex[] = { |
391df5dc BH |
56 | { |
57 | .ident = "Dell Optiplex GX1", | |
58 | .matches = { | |
59 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
60 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), | |
61 | }, | |
62 | }, | |
63 | { } | |
64 | }; | |
65 | ||
66 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ | |
609d4bc9 | 67 | static const struct dmi_system_id hp_t5710[] = { |
391df5dc BH |
68 | { |
69 | .ident = "HP t5710", | |
70 | .matches = { | |
71 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
72 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), | |
73 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), | |
74 | }, | |
75 | }, | |
76 | { } | |
77 | }; | |
78 | ||
79 | struct prt_quirk { | |
609d4bc9 | 80 | const struct dmi_system_id *system; |
391df5dc BH |
81 | unsigned int segment; |
82 | unsigned int bus; | |
83 | unsigned int device; | |
84 | unsigned char pin; | |
609d4bc9 JB |
85 | const char *source; /* according to BIOS */ |
86 | const char *actual_source; | |
391df5dc BH |
87 | }; |
88 | ||
c458033c BH |
89 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
90 | ||
391df5dc BH |
91 | /* |
92 | * These systems have incorrect _PRT entries. The BIOS claims the PCI | |
93 | * interrupt at the listed segment/bus/device/pin is connected to the first | |
94 | * link device, but it is actually connected to the second. | |
95 | */ | |
609d4bc9 | 96 | static const struct prt_quirk prt_quirks[] = { |
c458033c | 97 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
b97d4803 BH |
98 | "\\_SB_.PCI0.ISA_.LNKA", |
99 | "\\_SB_.PCI0.ISA_.LNKB"}, | |
c458033c | 100 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
391df5dc BH |
101 | "\\_SB_.LNKB", |
102 | "\\_SB_.LNKA"}, | |
c458033c | 103 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
391df5dc BH |
104 | "\\_SB_.PCI0.LNK1", |
105 | "\\_SB_.PCI0.LNK3"}, | |
106 | }; | |
107 | ||
3f0f3c27 BH |
108 | static void do_prt_fixups(struct acpi_prt_entry *entry, |
109 | struct acpi_pci_routing_table *prt) | |
391df5dc BH |
110 | { |
111 | int i; | |
609d4bc9 | 112 | const struct prt_quirk *quirk; |
391df5dc BH |
113 | |
114 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { | |
115 | quirk = &prt_quirks[i]; | |
116 | ||
117 | /* All current quirks involve link devices, not GSIs */ | |
391df5dc BH |
118 | if (dmi_check_system(quirk->system) && |
119 | entry->id.segment == quirk->segment && | |
120 | entry->id.bus == quirk->bus && | |
121 | entry->id.device == quirk->device && | |
c458033c | 122 | entry->pin == quirk->pin && |
391df5dc BH |
123 | !strcmp(prt->source, quirk->source) && |
124 | strlen(prt->source) >= strlen(quirk->actual_source)) { | |
bf5144a6 | 125 | pr_warn("Firmware reports " |
c83642d5 | 126 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
391df5dc BH |
127 | "changing to %s\n", |
128 | entry->id.segment, entry->id.bus, | |
cf68b80b | 129 | entry->id.device, pin_name(entry->pin), |
391df5dc BH |
130 | prt->source, quirk->actual_source); |
131 | strcpy(prt->source, quirk->actual_source); | |
132 | } | |
133 | } | |
134 | } | |
135 | ||
181380b7 YL |
136 | static int acpi_pci_irq_check_entry(acpi_handle handle, struct pci_dev *dev, |
137 | int pin, struct acpi_pci_routing_table *prt, | |
138 | struct acpi_prt_entry **entry_ptr) | |
1da177e4 | 139 | { |
181380b7 YL |
140 | int segment = pci_domain_nr(dev->bus); |
141 | int bus = dev->bus->number; | |
917bfd93 | 142 | int device = pci_ari_enabled(dev->bus) ? 0 : PCI_SLOT(dev->devfn); |
3604a9f4 | 143 | struct acpi_prt_entry *entry; |
1da177e4 | 144 | |
181380b7 YL |
145 | if (((prt->address >> 16) & 0xffff) != device || |
146 | prt->pin + 1 != pin) | |
147 | return -ENODEV; | |
148 | ||
36bcbec7 | 149 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
1da177e4 | 150 | if (!entry) |
d550d98d | 151 | return -ENOMEM; |
1da177e4 | 152 | |
e64e9db5 BH |
153 | /* |
154 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses | |
155 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert | |
156 | * it here. | |
157 | */ | |
79c44122 BH |
158 | entry->id.segment = segment; |
159 | entry->id.bus = bus; | |
1da177e4 | 160 | entry->id.device = (prt->address >> 16) & 0xFFFF; |
e64e9db5 | 161 | entry->pin = prt->pin + 1; |
1da177e4 | 162 | |
391df5dc BH |
163 | do_prt_fixups(entry, prt); |
164 | ||
4eaf6db3 BH |
165 | entry->index = prt->source_index; |
166 | ||
1da177e4 LT |
167 | /* |
168 | * Type 1: Dynamic | |
169 | * --------------- | |
170 | * The 'source' field specifies the PCI interrupt link device used to | |
171 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' | |
172 | * indicates which resource descriptor in the resource template (of | |
173 | * the link device) this interrupt is allocated from. | |
c6237b21 | 174 | * |
1da177e4 LT |
175 | * NOTE: Don't query the Link Device for IRQ information at this time |
176 | * because Link Device enumeration may not have occurred yet | |
177 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI | |
178 | * namespace). | |
179 | */ | |
4eaf6db3 BH |
180 | if (prt->source[0]) |
181 | acpi_get_handle(handle, prt->source, &entry->link); | |
182 | ||
1da177e4 LT |
183 | /* |
184 | * Type 2: Static | |
185 | * -------------- | |
186 | * The 'source' field is NULL, and the 'source_index' field specifies | |
187 | * the IRQ value, which is hardwired to specific interrupt inputs on | |
188 | * the interrupt controller. | |
189 | */ | |
bf5144a6 RW |
190 | pr_debug("%04x:%02x:%02x[%c] -> %s[%d]\n", |
191 | entry->id.segment, entry->id.bus, entry->id.device, | |
192 | pin_name(entry->pin), prt->source, entry->index); | |
1da177e4 | 193 | |
181380b7 | 194 | *entry_ptr = entry; |
1da177e4 | 195 | |
d550d98d | 196 | return 0; |
1da177e4 LT |
197 | } |
198 | ||
181380b7 YL |
199 | static int acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
200 | int pin, struct acpi_prt_entry **entry_ptr) | |
1da177e4 | 201 | { |
2320ac6c BH |
202 | acpi_status status; |
203 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
204 | struct acpi_pci_routing_table *entry; | |
181380b7 | 205 | acpi_handle handle = NULL; |
1da177e4 | 206 | |
181380b7 YL |
207 | if (dev->bus->bridge) |
208 | handle = ACPI_HANDLE(dev->bus->bridge); | |
1da177e4 | 209 | |
181380b7 YL |
210 | if (!handle) |
211 | return -ENODEV; | |
1da177e4 | 212 | |
181380b7 | 213 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
1da177e4 LT |
214 | status = acpi_get_irq_routing_table(handle, &buffer); |
215 | if (ACPI_FAILURE(status)) { | |
1da177e4 | 216 | kfree(buffer.pointer); |
d550d98d | 217 | return -ENODEV; |
1da177e4 LT |
218 | } |
219 | ||
2320ac6c | 220 | entry = buffer.pointer; |
1da177e4 | 221 | while (entry && (entry->length > 0)) { |
181380b7 YL |
222 | if (!acpi_pci_irq_check_entry(handle, dev, pin, |
223 | entry, entry_ptr)) | |
224 | break; | |
1da177e4 | 225 | entry = (struct acpi_pci_routing_table *) |
4be44fcd | 226 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
227 | } |
228 | ||
2320ac6c | 229 | kfree(buffer.pointer); |
d550d98d | 230 | return 0; |
1da177e4 LT |
231 | } |
232 | ||
1da177e4 LT |
233 | /* -------------------------------------------------------------------------- |
234 | PCI Interrupt Routing Support | |
235 | -------------------------------------------------------------------------- */ | |
d7f6169a SA |
236 | #ifdef CONFIG_X86_IO_APIC |
237 | extern int noioapicquirk; | |
238 | extern int noioapicreroute; | |
239 | ||
240 | static int bridge_has_boot_interrupt_variant(struct pci_bus *bus) | |
241 | { | |
242 | struct pci_bus *bus_it; | |
243 | ||
244 | for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) { | |
245 | if (!bus_it->self) | |
246 | return 0; | |
247 | if (bus_it->self->irq_reroute_variant) | |
248 | return bus_it->self->irq_reroute_variant; | |
249 | } | |
250 | return 0; | |
251 | } | |
252 | ||
253 | /* | |
254 | * Some chipsets (e.g. Intel 6700PXH) generate a legacy INTx when the IRQ | |
255 | * entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does | |
256 | * during interrupt handling). When this INTx generation cannot be disabled, | |
257 | * we reroute these interrupts to their legacy equivalent to get rid of | |
258 | * spurious interrupts. | |
259 | */ | |
260 | static int acpi_reroute_boot_interrupt(struct pci_dev *dev, | |
261 | struct acpi_prt_entry *entry) | |
262 | { | |
263 | if (noioapicquirk || noioapicreroute) { | |
264 | return 0; | |
265 | } else { | |
266 | switch (bridge_has_boot_interrupt_variant(dev->bus)) { | |
267 | case 0: | |
268 | /* no rerouting necessary */ | |
269 | return 0; | |
270 | case INTEL_IRQ_REROUTE_VARIANT: | |
271 | /* | |
272 | * Remap according to INTx routing table in 6700PXH | |
273 | * specs, intel order number 302628-002, section | |
274 | * 2.15.2. Other chipsets (80332, ...) have the same | |
275 | * mapping and are handled here as well. | |
276 | */ | |
277 | dev_info(&dev->dev, "PCI IRQ %d -> rerouted to legacy " | |
278 | "IRQ %d\n", entry->index, | |
279 | (entry->index % 4) + 16); | |
280 | entry->index = (entry->index % 4) + 16; | |
281 | return 1; | |
282 | default: | |
283 | dev_warn(&dev->dev, "Cannot reroute IRQ %d to legacy " | |
284 | "IRQ: unknown mapping\n", entry->index); | |
285 | return -1; | |
286 | } | |
287 | } | |
288 | } | |
289 | #endif /* CONFIG_X86_IO_APIC */ | |
290 | ||
3f0f3c27 | 291 | static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
1da177e4 | 292 | { |
181380b7 | 293 | struct acpi_prt_entry *entry = NULL; |
5697b7ca BH |
294 | struct pci_dev *bridge; |
295 | u8 bridge_pin, orig_pin = pin; | |
181380b7 | 296 | int ret; |
1da177e4 | 297 | |
181380b7 YL |
298 | ret = acpi_pci_irq_find_prt_entry(dev, pin, &entry); |
299 | if (!ret && entry) { | |
d7f6169a SA |
300 | #ifdef CONFIG_X86_IO_APIC |
301 | acpi_reroute_boot_interrupt(dev, entry); | |
302 | #endif /* CONFIG_X86_IO_APIC */ | |
bf5144a6 | 303 | dev_dbg(&dev->dev, "Found [%c] _PRT entry\n", pin_name(pin)); |
3b1ea18d | 304 | return entry; |
1da177e4 | 305 | } |
4be44fcd | 306 | |
181380b7 | 307 | /* |
1da177e4 LT |
308 | * Attempt to derive an IRQ for this device from a parent bridge's |
309 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). | |
310 | */ | |
ee401363 BH |
311 | bridge = dev->bus->self; |
312 | while (bridge) { | |
c686d141 | 313 | pin = pci_swizzle_interrupt_pin(dev, pin); |
1da177e4 LT |
314 | |
315 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { | |
316 | /* PC card has the same IRQ as its cardbridge */ | |
8015a014 | 317 | bridge_pin = bridge->pin; |
1da177e4 | 318 | if (!bridge_pin) { |
bf5144a6 | 319 | dev_dbg(&bridge->dev, "No interrupt pin configured\n"); |
beba8a64 | 320 | return NULL; |
1da177e4 | 321 | } |
1da177e4 LT |
322 | pin = bridge_pin; |
323 | } | |
324 | ||
181380b7 YL |
325 | ret = acpi_pci_irq_find_prt_entry(bridge, pin, &entry); |
326 | if (!ret && entry) { | |
bf5144a6 RW |
327 | dev_dbg(&dev->dev, "Derived GSI INT %c from %s\n", |
328 | pin_name(orig_pin), pci_name(bridge)); | |
3b1ea18d BH |
329 | return entry; |
330 | } | |
ee401363 BH |
331 | |
332 | dev = bridge; | |
333 | bridge = dev->bus->self; | |
1da177e4 LT |
334 | } |
335 | ||
3b1ea18d BH |
336 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
337 | pin_name(orig_pin)); | |
338 | return NULL; | |
1da177e4 LT |
339 | } |
340 | ||
c1aaae67 TN |
341 | #if IS_ENABLED(CONFIG_ISA) || IS_ENABLED(CONFIG_EISA) |
342 | static int acpi_isa_register_gsi(struct pci_dev *dev) | |
343 | { | |
344 | u32 dev_gsi; | |
345 | ||
346 | /* Interrupt Line values above 0xF are forbidden */ | |
347 | if (dev->irq > 0 && (dev->irq <= 0xF) && | |
5ebc7603 | 348 | acpi_isa_irq_available(dev->irq) && |
c1aaae67 TN |
349 | (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) { |
350 | dev_warn(&dev->dev, "PCI INT %c: no GSI - using ISA IRQ %d\n", | |
351 | pin_name(dev->pin), dev->irq); | |
352 | acpi_register_gsi(&dev->dev, dev_gsi, | |
353 | ACPI_LEVEL_SENSITIVE, | |
354 | ACPI_ACTIVE_LOW); | |
355 | return 0; | |
356 | } | |
357 | return -EINVAL; | |
358 | } | |
359 | #else | |
360 | static inline int acpi_isa_register_gsi(struct pci_dev *dev) | |
361 | { | |
362 | return -ENODEV; | |
363 | } | |
364 | #endif | |
365 | ||
e237a551 CF |
366 | static inline bool acpi_pci_irq_valid(struct pci_dev *dev, u8 pin) |
367 | { | |
368 | #ifdef CONFIG_X86 | |
369 | /* | |
370 | * On x86 irq line 0xff means "unknown" or "no connection" | |
371 | * (PCI 3.0, Section 6.2.4, footnote on page 223). | |
372 | */ | |
373 | if (dev->irq == 0xff) { | |
374 | dev->irq = IRQ_NOTCONNECTED; | |
375 | dev_warn(&dev->dev, "PCI INT %c: not connected\n", | |
376 | pin_name(pin)); | |
377 | return false; | |
378 | } | |
379 | #endif | |
380 | return true; | |
381 | } | |
382 | ||
4be44fcd | 383 | int acpi_pci_irq_enable(struct pci_dev *dev) |
1da177e4 | 384 | { |
beba8a64 | 385 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
386 | int gsi; |
387 | u8 pin; | |
50eca3eb | 388 | int triggering = ACPI_LEVEL_SENSITIVE; |
10b68700 | 389 | /* |
d0c50cc4 JL |
390 | * On ARM systems with the GIC interrupt model, or LoongArch |
391 | * systems with the LPIC interrupt model, level interrupts | |
10b68700 LP |
392 | * are always polarity high by specification; PCI legacy |
393 | * IRQs lines are inverted before reaching the interrupt | |
394 | * controller and must therefore be considered active high | |
395 | * as default. | |
396 | */ | |
d0c50cc4 JL |
397 | int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC || |
398 | acpi_irq_model == ACPI_IRQ_MODEL_LPIC ? | |
10b68700 | 399 | ACPI_ACTIVE_HIGH : 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) { |
bf5144a6 | 406 | dev_dbg(&dev->dev, "No interrupt pin configured\n"); |
d550d98d | 407 | return 0; |
1da177e4 | 408 | } |
1da177e4 | 409 | |
67b4eab9 | 410 | if (dev->irq_managed && dev->irq > 0) |
cffe0a2b JL |
411 | return 0; |
412 | ||
beba8a64 | 413 | entry = acpi_pci_irq_lookup(dev, pin); |
5697b7ca | 414 | if (!entry) { |
96c2a876 AC |
415 | /* |
416 | * IDE legacy mode controller IRQs are magic. Why do compat | |
417 | * extensions always make such a nasty mess. | |
418 | */ | |
419 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && | |
420 | (dev->class & 0x05) == 0) | |
421 | return 0; | |
422 | } | |
5697b7ca | 423 | |
74f82af1 BH |
424 | if (entry) { |
425 | if (entry->link) | |
426 | gsi = acpi_pci_link_allocate_irq(entry->link, | |
427 | entry->index, | |
428 | &triggering, &polarity, | |
429 | &link); | |
430 | else | |
431 | gsi = entry->index; | |
432 | } else | |
5697b7ca BH |
433 | gsi = -1; |
434 | ||
c13f889a | 435 | if (gsi < 0) { |
e237a551 CF |
436 | /* |
437 | * No IRQ known to the ACPI subsystem - maybe the BIOS / | |
438 | * driver reported one, then use it. Exit in any case. | |
439 | */ | |
29b49958 WW |
440 | if (!acpi_pci_irq_valid(dev, pin)) { |
441 | kfree(entry); | |
e237a551 | 442 | return 0; |
29b49958 | 443 | } |
e237a551 | 444 | |
c1aaae67 | 445 | if (acpi_isa_register_gsi(dev)) |
66fd3835 JP |
446 | dev_warn(&dev->dev, "PCI INT %c: no GSI\n", |
447 | pin_name(pin)); | |
181380b7 | 448 | |
b685f3b1 | 449 | kfree(entry); |
66fd3835 | 450 | return 0; |
4be44fcd | 451 | } |
1da177e4 | 452 | |
a2f809b0 | 453 | rc = acpi_register_gsi(&dev->dev, 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)); |
181380b7 | 457 | kfree(entry); |
d550d98d | 458 | return rc; |
349f0d56 | 459 | } |
67b4eab9 BH |
460 | dev->irq = rc; |
461 | dev->irq_managed = 1; | |
1da177e4 | 462 | |
1da177e4 | 463 | if (link) |
c83642d5 BH |
464 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
465 | else | |
466 | link_desc[0] = '\0'; | |
1da177e4 | 467 | |
85b8582d VP |
468 | dev_dbg(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
469 | pin_name(pin), link_desc, gsi, | |
470 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", | |
471 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); | |
1da177e4 | 472 | |
181380b7 | 473 | kfree(entry); |
d550d98d | 474 | return 0; |
1da177e4 | 475 | } |
1da177e4 | 476 | |
4be44fcd | 477 | void acpi_pci_irq_disable(struct pci_dev *dev) |
1da177e4 | 478 | { |
beba8a64 | 479 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
480 | int gsi; |
481 | u8 pin; | |
1da177e4 | 482 | |
8015a014 | 483 | pin = dev->pin; |
67b4eab9 | 484 | if (!pin || !dev->irq_managed || dev->irq <= 0) |
d550d98d | 485 | return; |
1da177e4 | 486 | |
6c777e87 BH |
487 | /* Keep IOAPIC pin configuration when suspending */ |
488 | if (dev->dev.power.is_prepared) | |
489 | return; | |
490 | #ifdef CONFIG_PM | |
491 | if (dev->dev.power.runtime_status == RPM_SUSPENDING) | |
492 | return; | |
493 | #endif | |
494 | ||
beba8a64 | 495 | entry = acpi_pci_irq_lookup(dev, pin); |
beba8a64 | 496 | if (!entry) |
d550d98d | 497 | return; |
1da177e4 | 498 | |
74f82af1 BH |
499 | if (entry->link) |
500 | gsi = acpi_pci_link_free_irq(entry->link); | |
501 | else | |
502 | gsi = entry->index; | |
beba8a64 | 503 | |
181380b7 YL |
504 | kfree(entry); |
505 | ||
1da177e4 LT |
506 | /* |
507 | * TBD: It might be worth clearing dev->irq by magic constant | |
508 | * (e.g. PCI_UNDEFINED_IRQ). | |
509 | */ | |
510 | ||
85b8582d | 511 | dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
cffe0a2b | 512 | if (gsi >= 0) { |
6a38fa0e | 513 | acpi_unregister_gsi(gsi); |
67b4eab9 | 514 | dev->irq_managed = 0; |
cffe0a2b | 515 | } |
1da177e4 | 516 | } |