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 | ||
1da177e4 | 12 | |
391df5dc | 13 | #include <linux/dmi.h> |
1da177e4 LT |
14 | #include <linux/kernel.h> |
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/types.h> | |
1da177e4 LT |
18 | #include <linux/spinlock.h> |
19 | #include <linux/pm.h> | |
20 | #include <linux/pci.h> | |
21 | #include <linux/acpi.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
e237a551 | 23 | #include <linux/interrupt.h> |
1da177e4 | 24 | |
a192a958 LB |
25 | #define PREFIX "ACPI: " |
26 | ||
1da177e4 | 27 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 28 | ACPI_MODULE_NAME("pci_irq"); |
1da177e4 | 29 | |
f748bafa | 30 | struct acpi_prt_entry { |
f748bafa BH |
31 | struct acpi_pci_id id; |
32 | u8 pin; | |
4eaf6db3 BH |
33 | acpi_handle link; |
34 | u32 index; /* GSI, or link _CRS index */ | |
f748bafa BH |
35 | }; |
36 | ||
cf68b80b BH |
37 | static inline char pin_name(int pin) |
38 | { | |
e64e9db5 | 39 | return 'A' + pin - 1; |
cf68b80b BH |
40 | } |
41 | ||
1da177e4 LT |
42 | /* -------------------------------------------------------------------------- |
43 | PCI IRQ Routing Table (PRT) Support | |
44 | -------------------------------------------------------------------------- */ | |
45 | ||
391df5dc | 46 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
609d4bc9 | 47 | static const struct dmi_system_id medion_md9580[] = { |
391df5dc BH |
48 | { |
49 | .ident = "Medion MD9580-F laptop", | |
50 | .matches = { | |
51 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), | |
52 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), | |
53 | }, | |
54 | }, | |
55 | { } | |
56 | }; | |
57 | ||
58 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ | |
609d4bc9 | 59 | static const struct dmi_system_id dell_optiplex[] = { |
391df5dc BH |
60 | { |
61 | .ident = "Dell Optiplex GX1", | |
62 | .matches = { | |
63 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
64 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), | |
65 | }, | |
66 | }, | |
67 | { } | |
68 | }; | |
69 | ||
70 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ | |
609d4bc9 | 71 | static const struct dmi_system_id hp_t5710[] = { |
391df5dc BH |
72 | { |
73 | .ident = "HP t5710", | |
74 | .matches = { | |
75 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
76 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), | |
77 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), | |
78 | }, | |
79 | }, | |
80 | { } | |
81 | }; | |
82 | ||
83 | struct prt_quirk { | |
609d4bc9 | 84 | const struct dmi_system_id *system; |
391df5dc BH |
85 | unsigned int segment; |
86 | unsigned int bus; | |
87 | unsigned int device; | |
88 | unsigned char pin; | |
609d4bc9 JB |
89 | const char *source; /* according to BIOS */ |
90 | const char *actual_source; | |
391df5dc BH |
91 | }; |
92 | ||
c458033c BH |
93 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
94 | ||
391df5dc BH |
95 | /* |
96 | * These systems have incorrect _PRT entries. The BIOS claims the PCI | |
97 | * interrupt at the listed segment/bus/device/pin is connected to the first | |
98 | * link device, but it is actually connected to the second. | |
99 | */ | |
609d4bc9 | 100 | static const struct prt_quirk prt_quirks[] = { |
c458033c | 101 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
b97d4803 BH |
102 | "\\_SB_.PCI0.ISA_.LNKA", |
103 | "\\_SB_.PCI0.ISA_.LNKB"}, | |
c458033c | 104 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
391df5dc BH |
105 | "\\_SB_.LNKB", |
106 | "\\_SB_.LNKA"}, | |
c458033c | 107 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
391df5dc BH |
108 | "\\_SB_.PCI0.LNK1", |
109 | "\\_SB_.PCI0.LNK3"}, | |
110 | }; | |
111 | ||
3f0f3c27 BH |
112 | static void do_prt_fixups(struct acpi_prt_entry *entry, |
113 | struct acpi_pci_routing_table *prt) | |
391df5dc BH |
114 | { |
115 | int i; | |
609d4bc9 | 116 | const struct prt_quirk *quirk; |
391df5dc BH |
117 | |
118 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { | |
119 | quirk = &prt_quirks[i]; | |
120 | ||
121 | /* All current quirks involve link devices, not GSIs */ | |
391df5dc BH |
122 | if (dmi_check_system(quirk->system) && |
123 | entry->id.segment == quirk->segment && | |
124 | entry->id.bus == quirk->bus && | |
125 | entry->id.device == quirk->device && | |
c458033c | 126 | entry->pin == quirk->pin && |
391df5dc BH |
127 | !strcmp(prt->source, quirk->source) && |
128 | strlen(prt->source) >= strlen(quirk->actual_source)) { | |
129 | printk(KERN_WARNING PREFIX "firmware reports " | |
c83642d5 | 130 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
391df5dc BH |
131 | "changing to %s\n", |
132 | entry->id.segment, entry->id.bus, | |
cf68b80b | 133 | entry->id.device, pin_name(entry->pin), |
391df5dc BH |
134 | prt->source, quirk->actual_source); |
135 | strcpy(prt->source, quirk->actual_source); | |
136 | } | |
137 | } | |
138 | } | |
139 | ||
181380b7 YL |
140 | static int acpi_pci_irq_check_entry(acpi_handle handle, struct pci_dev *dev, |
141 | int pin, struct acpi_pci_routing_table *prt, | |
142 | struct acpi_prt_entry **entry_ptr) | |
1da177e4 | 143 | { |
181380b7 YL |
144 | int segment = pci_domain_nr(dev->bus); |
145 | int bus = dev->bus->number; | |
917bfd93 | 146 | int device = pci_ari_enabled(dev->bus) ? 0 : PCI_SLOT(dev->devfn); |
3604a9f4 | 147 | struct acpi_prt_entry *entry; |
1da177e4 | 148 | |
181380b7 YL |
149 | if (((prt->address >> 16) & 0xffff) != device || |
150 | prt->pin + 1 != pin) | |
151 | return -ENODEV; | |
152 | ||
36bcbec7 | 153 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
1da177e4 | 154 | if (!entry) |
d550d98d | 155 | return -ENOMEM; |
1da177e4 | 156 | |
e64e9db5 BH |
157 | /* |
158 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses | |
159 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert | |
160 | * it here. | |
161 | */ | |
79c44122 BH |
162 | entry->id.segment = segment; |
163 | entry->id.bus = bus; | |
1da177e4 | 164 | entry->id.device = (prt->address >> 16) & 0xFFFF; |
e64e9db5 | 165 | entry->pin = prt->pin + 1; |
1da177e4 | 166 | |
391df5dc BH |
167 | do_prt_fixups(entry, prt); |
168 | ||
4eaf6db3 BH |
169 | entry->index = prt->source_index; |
170 | ||
1da177e4 LT |
171 | /* |
172 | * Type 1: Dynamic | |
173 | * --------------- | |
174 | * The 'source' field specifies the PCI interrupt link device used to | |
175 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' | |
176 | * indicates which resource descriptor in the resource template (of | |
177 | * the link device) this interrupt is allocated from. | |
178 | * | |
179 | * NOTE: Don't query the Link Device for IRQ information at this time | |
180 | * because Link Device enumeration may not have occurred yet | |
181 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI | |
182 | * namespace). | |
183 | */ | |
4eaf6db3 BH |
184 | if (prt->source[0]) |
185 | acpi_get_handle(handle, prt->source, &entry->link); | |
186 | ||
1da177e4 LT |
187 | /* |
188 | * Type 2: Static | |
189 | * -------------- | |
190 | * The 'source' field is NULL, and the 'source_index' field specifies | |
191 | * the IRQ value, which is hardwired to specific interrupt inputs on | |
192 | * the interrupt controller. | |
193 | */ | |
1da177e4 LT |
194 | |
195 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
21a53283 | 196 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
4be44fcd | 197 | entry->id.segment, entry->id.bus, |
cf68b80b | 198 | entry->id.device, pin_name(entry->pin), |
4eaf6db3 | 199 | prt->source, entry->index)); |
1da177e4 | 200 | |
181380b7 | 201 | *entry_ptr = entry; |
1da177e4 | 202 | |
d550d98d | 203 | return 0; |
1da177e4 LT |
204 | } |
205 | ||
181380b7 YL |
206 | static int acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
207 | int pin, struct acpi_prt_entry **entry_ptr) | |
1da177e4 | 208 | { |
2320ac6c BH |
209 | acpi_status status; |
210 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
211 | struct acpi_pci_routing_table *entry; | |
181380b7 | 212 | acpi_handle handle = NULL; |
1da177e4 | 213 | |
181380b7 YL |
214 | if (dev->bus->bridge) |
215 | handle = ACPI_HANDLE(dev->bus->bridge); | |
1da177e4 | 216 | |
181380b7 YL |
217 | if (!handle) |
218 | return -ENODEV; | |
1da177e4 | 219 | |
181380b7 | 220 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
1da177e4 LT |
221 | status = acpi_get_irq_routing_table(handle, &buffer); |
222 | if (ACPI_FAILURE(status)) { | |
1da177e4 | 223 | kfree(buffer.pointer); |
d550d98d | 224 | return -ENODEV; |
1da177e4 LT |
225 | } |
226 | ||
2320ac6c | 227 | entry = buffer.pointer; |
1da177e4 | 228 | while (entry && (entry->length > 0)) { |
181380b7 YL |
229 | if (!acpi_pci_irq_check_entry(handle, dev, pin, |
230 | entry, entry_ptr)) | |
231 | break; | |
1da177e4 | 232 | entry = (struct acpi_pci_routing_table *) |
4be44fcd | 233 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
234 | } |
235 | ||
2320ac6c | 236 | kfree(buffer.pointer); |
d550d98d | 237 | return 0; |
1da177e4 LT |
238 | } |
239 | ||
1da177e4 LT |
240 | /* -------------------------------------------------------------------------- |
241 | PCI Interrupt Routing Support | |
242 | -------------------------------------------------------------------------- */ | |
d7f6169a SA |
243 | #ifdef CONFIG_X86_IO_APIC |
244 | extern int noioapicquirk; | |
245 | extern int noioapicreroute; | |
246 | ||
247 | static int bridge_has_boot_interrupt_variant(struct pci_bus *bus) | |
248 | { | |
249 | struct pci_bus *bus_it; | |
250 | ||
251 | for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) { | |
252 | if (!bus_it->self) | |
253 | return 0; | |
254 | if (bus_it->self->irq_reroute_variant) | |
255 | return bus_it->self->irq_reroute_variant; | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Some chipsets (e.g. Intel 6700PXH) generate a legacy INTx when the IRQ | |
262 | * entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does | |
263 | * during interrupt handling). When this INTx generation cannot be disabled, | |
264 | * we reroute these interrupts to their legacy equivalent to get rid of | |
265 | * spurious interrupts. | |
266 | */ | |
267 | static int acpi_reroute_boot_interrupt(struct pci_dev *dev, | |
268 | struct acpi_prt_entry *entry) | |
269 | { | |
270 | if (noioapicquirk || noioapicreroute) { | |
271 | return 0; | |
272 | } else { | |
273 | switch (bridge_has_boot_interrupt_variant(dev->bus)) { | |
274 | case 0: | |
275 | /* no rerouting necessary */ | |
276 | return 0; | |
277 | case INTEL_IRQ_REROUTE_VARIANT: | |
278 | /* | |
279 | * Remap according to INTx routing table in 6700PXH | |
280 | * specs, intel order number 302628-002, section | |
281 | * 2.15.2. Other chipsets (80332, ...) have the same | |
282 | * mapping and are handled here as well. | |
283 | */ | |
284 | dev_info(&dev->dev, "PCI IRQ %d -> rerouted to legacy " | |
285 | "IRQ %d\n", entry->index, | |
286 | (entry->index % 4) + 16); | |
287 | entry->index = (entry->index % 4) + 16; | |
288 | return 1; | |
289 | default: | |
290 | dev_warn(&dev->dev, "Cannot reroute IRQ %d to legacy " | |
291 | "IRQ: unknown mapping\n", entry->index); | |
292 | return -1; | |
293 | } | |
294 | } | |
295 | } | |
296 | #endif /* CONFIG_X86_IO_APIC */ | |
297 | ||
3f0f3c27 | 298 | static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
1da177e4 | 299 | { |
181380b7 | 300 | struct acpi_prt_entry *entry = NULL; |
5697b7ca BH |
301 | struct pci_dev *bridge; |
302 | u8 bridge_pin, orig_pin = pin; | |
181380b7 | 303 | int ret; |
1da177e4 | 304 | |
181380b7 YL |
305 | ret = acpi_pci_irq_find_prt_entry(dev, pin, &entry); |
306 | if (!ret && entry) { | |
d7f6169a SA |
307 | #ifdef CONFIG_X86_IO_APIC |
308 | acpi_reroute_boot_interrupt(dev, entry); | |
309 | #endif /* CONFIG_X86_IO_APIC */ | |
3b1ea18d | 310 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", |
1350487e | 311 | pci_name(dev), pin_name(pin))); |
3b1ea18d | 312 | return entry; |
1da177e4 | 313 | } |
4be44fcd | 314 | |
181380b7 | 315 | /* |
1da177e4 LT |
316 | * Attempt to derive an IRQ for this device from a parent bridge's |
317 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). | |
318 | */ | |
ee401363 BH |
319 | bridge = dev->bus->self; |
320 | while (bridge) { | |
c686d141 | 321 | pin = pci_swizzle_interrupt_pin(dev, pin); |
1da177e4 LT |
322 | |
323 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { | |
324 | /* PC card has the same IRQ as its cardbridge */ | |
8015a014 | 325 | bridge_pin = bridge->pin; |
1da177e4 | 326 | if (!bridge_pin) { |
4be44fcd LB |
327 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
328 | "No interrupt pin configured for device %s\n", | |
329 | pci_name(bridge))); | |
beba8a64 | 330 | return NULL; |
1da177e4 | 331 | } |
1da177e4 LT |
332 | pin = bridge_pin; |
333 | } | |
334 | ||
181380b7 YL |
335 | ret = acpi_pci_irq_find_prt_entry(bridge, pin, &entry); |
336 | if (!ret && entry) { | |
3b1ea18d BH |
337 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
338 | "Derived GSI for %s INT %c from %s\n", | |
339 | pci_name(dev), pin_name(orig_pin), | |
340 | pci_name(bridge))); | |
341 | return entry; | |
342 | } | |
ee401363 BH |
343 | |
344 | dev = bridge; | |
345 | bridge = dev->bus->self; | |
1da177e4 LT |
346 | } |
347 | ||
3b1ea18d BH |
348 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
349 | pin_name(orig_pin)); | |
350 | return NULL; | |
1da177e4 LT |
351 | } |
352 | ||
c1aaae67 TN |
353 | #if IS_ENABLED(CONFIG_ISA) || IS_ENABLED(CONFIG_EISA) |
354 | static int acpi_isa_register_gsi(struct pci_dev *dev) | |
355 | { | |
356 | u32 dev_gsi; | |
357 | ||
358 | /* Interrupt Line values above 0xF are forbidden */ | |
359 | if (dev->irq > 0 && (dev->irq <= 0xF) && | |
5ebc7603 | 360 | acpi_isa_irq_available(dev->irq) && |
c1aaae67 TN |
361 | (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) { |
362 | dev_warn(&dev->dev, "PCI INT %c: no GSI - using ISA IRQ %d\n", | |
363 | pin_name(dev->pin), dev->irq); | |
364 | acpi_register_gsi(&dev->dev, dev_gsi, | |
365 | ACPI_LEVEL_SENSITIVE, | |
366 | ACPI_ACTIVE_LOW); | |
367 | return 0; | |
368 | } | |
369 | return -EINVAL; | |
370 | } | |
371 | #else | |
372 | static inline int acpi_isa_register_gsi(struct pci_dev *dev) | |
373 | { | |
374 | return -ENODEV; | |
375 | } | |
376 | #endif | |
377 | ||
e237a551 CF |
378 | static inline bool acpi_pci_irq_valid(struct pci_dev *dev, u8 pin) |
379 | { | |
380 | #ifdef CONFIG_X86 | |
381 | /* | |
382 | * On x86 irq line 0xff means "unknown" or "no connection" | |
383 | * (PCI 3.0, Section 6.2.4, footnote on page 223). | |
384 | */ | |
385 | if (dev->irq == 0xff) { | |
386 | dev->irq = IRQ_NOTCONNECTED; | |
387 | dev_warn(&dev->dev, "PCI INT %c: not connected\n", | |
388 | pin_name(pin)); | |
389 | return false; | |
390 | } | |
391 | #endif | |
392 | return true; | |
393 | } | |
394 | ||
4be44fcd | 395 | int acpi_pci_irq_enable(struct pci_dev *dev) |
1da177e4 | 396 | { |
beba8a64 | 397 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
398 | int gsi; |
399 | u8 pin; | |
50eca3eb | 400 | int triggering = ACPI_LEVEL_SENSITIVE; |
10b68700 LP |
401 | /* |
402 | * On ARM systems with the GIC interrupt model, level interrupts | |
403 | * are always polarity high by specification; PCI legacy | |
404 | * IRQs lines are inverted before reaching the interrupt | |
405 | * controller and must therefore be considered active high | |
406 | * as default. | |
407 | */ | |
408 | int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ? | |
409 | ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW; | |
4be44fcd | 410 | char *link = NULL; |
c83642d5 | 411 | char link_desc[16]; |
4be44fcd | 412 | int rc; |
1da177e4 | 413 | |
8015a014 | 414 | pin = dev->pin; |
1da177e4 | 415 | if (!pin) { |
4be44fcd LB |
416 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
417 | "No interrupt pin configured for device %s\n", | |
418 | pci_name(dev))); | |
d550d98d | 419 | return 0; |
1da177e4 | 420 | } |
1da177e4 | 421 | |
67b4eab9 | 422 | if (dev->irq_managed && dev->irq > 0) |
cffe0a2b JL |
423 | return 0; |
424 | ||
beba8a64 | 425 | entry = acpi_pci_irq_lookup(dev, pin); |
5697b7ca | 426 | if (!entry) { |
96c2a876 AC |
427 | /* |
428 | * IDE legacy mode controller IRQs are magic. Why do compat | |
429 | * extensions always make such a nasty mess. | |
430 | */ | |
431 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && | |
432 | (dev->class & 0x05) == 0) | |
433 | return 0; | |
434 | } | |
5697b7ca | 435 | |
74f82af1 BH |
436 | if (entry) { |
437 | if (entry->link) | |
438 | gsi = acpi_pci_link_allocate_irq(entry->link, | |
439 | entry->index, | |
440 | &triggering, &polarity, | |
441 | &link); | |
442 | else | |
443 | gsi = entry->index; | |
444 | } else | |
5697b7ca BH |
445 | gsi = -1; |
446 | ||
c13f889a | 447 | if (gsi < 0) { |
e237a551 CF |
448 | /* |
449 | * No IRQ known to the ACPI subsystem - maybe the BIOS / | |
450 | * driver reported one, then use it. Exit in any case. | |
451 | */ | |
29b49958 WW |
452 | if (!acpi_pci_irq_valid(dev, pin)) { |
453 | kfree(entry); | |
e237a551 | 454 | return 0; |
29b49958 | 455 | } |
e237a551 | 456 | |
c1aaae67 | 457 | if (acpi_isa_register_gsi(dev)) |
66fd3835 JP |
458 | dev_warn(&dev->dev, "PCI INT %c: no GSI\n", |
459 | pin_name(pin)); | |
181380b7 | 460 | |
b685f3b1 | 461 | kfree(entry); |
66fd3835 | 462 | return 0; |
4be44fcd | 463 | } |
1da177e4 | 464 | |
a2f809b0 | 465 | rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity); |
349f0d56 | 466 | if (rc < 0) { |
c83642d5 | 467 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
cf68b80b | 468 | pin_name(pin)); |
181380b7 | 469 | kfree(entry); |
d550d98d | 470 | return rc; |
349f0d56 | 471 | } |
67b4eab9 BH |
472 | dev->irq = rc; |
473 | dev->irq_managed = 1; | |
1da177e4 | 474 | |
1da177e4 | 475 | if (link) |
c83642d5 BH |
476 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
477 | else | |
478 | link_desc[0] = '\0'; | |
1da177e4 | 479 | |
85b8582d VP |
480 | dev_dbg(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
481 | pin_name(pin), link_desc, gsi, | |
482 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", | |
483 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); | |
1da177e4 | 484 | |
181380b7 | 485 | kfree(entry); |
d550d98d | 486 | return 0; |
1da177e4 | 487 | } |
1da177e4 | 488 | |
4be44fcd | 489 | void acpi_pci_irq_disable(struct pci_dev *dev) |
1da177e4 | 490 | { |
beba8a64 | 491 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
492 | int gsi; |
493 | u8 pin; | |
1da177e4 | 494 | |
8015a014 | 495 | pin = dev->pin; |
67b4eab9 | 496 | if (!pin || !dev->irq_managed || dev->irq <= 0) |
d550d98d | 497 | return; |
1da177e4 | 498 | |
6c777e87 BH |
499 | /* Keep IOAPIC pin configuration when suspending */ |
500 | if (dev->dev.power.is_prepared) | |
501 | return; | |
502 | #ifdef CONFIG_PM | |
503 | if (dev->dev.power.runtime_status == RPM_SUSPENDING) | |
504 | return; | |
505 | #endif | |
506 | ||
beba8a64 | 507 | entry = acpi_pci_irq_lookup(dev, pin); |
beba8a64 | 508 | if (!entry) |
d550d98d | 509 | return; |
1da177e4 | 510 | |
74f82af1 BH |
511 | if (entry->link) |
512 | gsi = acpi_pci_link_free_irq(entry->link); | |
513 | else | |
514 | gsi = entry->index; | |
beba8a64 | 515 | |
181380b7 YL |
516 | kfree(entry); |
517 | ||
1da177e4 LT |
518 | /* |
519 | * TBD: It might be worth clearing dev->irq by magic constant | |
520 | * (e.g. PCI_UNDEFINED_IRQ). | |
521 | */ | |
522 | ||
85b8582d | 523 | dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
cffe0a2b | 524 | if (gsi >= 0) { |
6a38fa0e | 525 | acpi_unregister_gsi(gsi); |
67b4eab9 | 526 | dev->irq_managed = 0; |
cffe0a2b | 527 | } |
1da177e4 | 528 | } |