blob: e4804fb05e233d8dae18aacce47835a06dca16ec [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Bjorn Helgaas39488b02008-12-08 21:31:42 -07007 * (c) Copyright 2008 Hewlett-Packard Development Company, L.P.
8 * Bjorn Helgaas <bjorn.helgaas@hp.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
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 *
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25 *
26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
27 */
28
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
Bjorn Helgaas391df5d2008-03-11 13:45:15 -070030#include <linux/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/kernel.h>
32#include <linux/module.h>
33#include <linux/init.h>
34#include <linux/types.h>
35#include <linux/proc_fs.h>
36#include <linux/spinlock.h>
37#include <linux/pm.h>
38#include <linux/pci.h>
39#include <linux/acpi.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090040#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <acpi/acpi_bus.h>
42#include <acpi/acpi_drivers.h>
43
Len Browna192a952009-07-28 16:45:54 -040044#define PREFIX "ACPI: "
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#define _COMPONENT ACPI_PCI_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050047ACPI_MODULE_NAME("pci_irq");
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Bjorn Helgaasf748baf2008-12-08 21:30:31 -070049struct acpi_prt_entry {
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -070050 struct list_head list;
Bjorn Helgaasf748baf2008-12-08 21:30:31 -070051 struct acpi_pci_id id;
52 u8 pin;
Bjorn Helgaas4eaf6db2008-12-08 21:31:27 -070053 acpi_handle link;
54 u32 index; /* GSI, or link _CRS index */
Bjorn Helgaasf748baf2008-12-08 21:30:31 -070055};
56
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -070057static LIST_HEAD(acpi_prt_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058static DEFINE_SPINLOCK(acpi_prt_lock);
59
Bjorn Helgaascf68b802008-12-08 21:30:36 -070060static inline char pin_name(int pin)
61{
Bjorn Helgaase64e9db2008-12-08 21:30:41 -070062 return 'A' + pin - 1;
Bjorn Helgaascf68b802008-12-08 21:30:36 -070063}
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065/* --------------------------------------------------------------------------
66 PCI IRQ Routing Table (PRT) Support
67 -------------------------------------------------------------------------- */
68
Bjorn Helgaas063563b2008-12-08 21:30:51 -070069static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev,
70 int pin)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -070072 struct acpi_prt_entry *entry;
Bjorn Helgaas063563b2008-12-08 21:30:51 -070073 int segment = pci_domain_nr(dev->bus);
74 int bus = dev->bus->number;
75 int device = PCI_SLOT(dev->devfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 spin_lock(&acpi_prt_lock);
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -070078 list_for_each_entry(entry, &acpi_prt_list, list) {
Len Brown4be44fc2005-08-05 00:44:28 -040079 if ((segment == entry->id.segment)
80 && (bus == entry->id.bus)
81 && (device == entry->id.device)
82 && (pin == entry->pin)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 spin_unlock(&acpi_prt_lock);
Patrick Mocheld550d982006-06-27 00:41:40 -040084 return entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 }
86 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 spin_unlock(&acpi_prt_lock);
Patrick Mocheld550d982006-06-27 00:41:40 -040088 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089}
90
Bjorn Helgaas391df5d2008-03-11 13:45:15 -070091/* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */
Jan Beulich609d4bc2009-03-12 11:58:25 +000092static const struct dmi_system_id medion_md9580[] = {
Bjorn Helgaas391df5d2008-03-11 13:45:15 -070093 {
94 .ident = "Medion MD9580-F laptop",
95 .matches = {
96 DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"),
97 DMI_MATCH(DMI_PRODUCT_NAME, "A555"),
98 },
99 },
100 { }
101};
102
103/* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */
Jan Beulich609d4bc2009-03-12 11:58:25 +0000104static const struct dmi_system_id dell_optiplex[] = {
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700105 {
106 .ident = "Dell Optiplex GX1",
107 .matches = {
108 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
109 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"),
110 },
111 },
112 { }
113};
114
115/* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */
Jan Beulich609d4bc2009-03-12 11:58:25 +0000116static const struct dmi_system_id hp_t5710[] = {
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700117 {
118 .ident = "HP t5710",
119 .matches = {
120 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
121 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"),
122 DMI_MATCH(DMI_BOARD_NAME, "098Ch"),
123 },
124 },
125 { }
126};
127
128struct prt_quirk {
Jan Beulich609d4bc2009-03-12 11:58:25 +0000129 const struct dmi_system_id *system;
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700130 unsigned int segment;
131 unsigned int bus;
132 unsigned int device;
133 unsigned char pin;
Jan Beulich609d4bc2009-03-12 11:58:25 +0000134 const char *source; /* according to BIOS */
135 const char *actual_source;
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700136};
137
Bjorn Helgaasc4580332008-12-08 21:30:46 -0700138#define PCI_INTX_PIN(c) (c - 'A' + 1)
139
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700140/*
141 * These systems have incorrect _PRT entries. The BIOS claims the PCI
142 * interrupt at the listed segment/bus/device/pin is connected to the first
143 * link device, but it is actually connected to the second.
144 */
Jan Beulich609d4bc2009-03-12 11:58:25 +0000145static const struct prt_quirk prt_quirks[] = {
Bjorn Helgaasc4580332008-12-08 21:30:46 -0700146 { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'),
Bjorn Helgaasb97d4802008-03-25 11:21:11 -0600147 "\\_SB_.PCI0.ISA_.LNKA",
148 "\\_SB_.PCI0.ISA_.LNKB"},
Bjorn Helgaasc4580332008-12-08 21:30:46 -0700149 { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'),
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700150 "\\_SB_.LNKB",
151 "\\_SB_.LNKA"},
Bjorn Helgaasc4580332008-12-08 21:30:46 -0700152 { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'),
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700153 "\\_SB_.PCI0.LNK1",
154 "\\_SB_.PCI0.LNK3"},
155};
156
Bjorn Helgaas3f0f3c22008-12-08 21:31:37 -0700157static void do_prt_fixups(struct acpi_prt_entry *entry,
158 struct acpi_pci_routing_table *prt)
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700159{
160 int i;
Jan Beulich609d4bc2009-03-12 11:58:25 +0000161 const struct prt_quirk *quirk;
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700162
163 for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) {
164 quirk = &prt_quirks[i];
165
166 /* All current quirks involve link devices, not GSIs */
167 if (!prt->source)
168 continue;
169
170 if (dmi_check_system(quirk->system) &&
171 entry->id.segment == quirk->segment &&
172 entry->id.bus == quirk->bus &&
173 entry->id.device == quirk->device &&
Bjorn Helgaasc4580332008-12-08 21:30:46 -0700174 entry->pin == quirk->pin &&
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700175 !strcmp(prt->source, quirk->source) &&
176 strlen(prt->source) >= strlen(quirk->actual_source)) {
177 printk(KERN_WARNING PREFIX "firmware reports "
Bjorn Helgaasc83642d2008-06-27 08:45:39 -0600178 "%04x:%02x:%02x PCI INT %c connected to %s; "
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700179 "changing to %s\n",
180 entry->id.segment, entry->id.bus,
Bjorn Helgaascf68b802008-12-08 21:30:36 -0700181 entry->id.device, pin_name(entry->pin),
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700182 prt->source, quirk->actual_source);
183 strcpy(prt->source, quirk->actual_source);
184 }
185 }
186}
187
Alexander Chiang859a3f82009-06-10 19:55:35 +0000188static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
Bjorn Helgaas3f0f3c22008-12-08 21:31:37 -0700189 struct acpi_pci_routing_table *prt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -0700191 struct acpi_prt_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Burman Yan36bcbec2006-12-19 12:56:11 -0800193 entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400195 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
Bjorn Helgaase64e9db2008-12-08 21:30:41 -0700197 /*
198 * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses
199 * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert
200 * it here.
201 */
Alexander Chiang859a3f82009-06-10 19:55:35 +0000202 entry->id.segment = pci_domain_nr(bus);
203 entry->id.bus = bus->number;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 entry->id.device = (prt->address >> 16) & 0xFFFF;
Bjorn Helgaase64e9db2008-12-08 21:30:41 -0700205 entry->pin = prt->pin + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Bjorn Helgaas391df5d2008-03-11 13:45:15 -0700207 do_prt_fixups(entry, prt);
208
Bjorn Helgaas4eaf6db2008-12-08 21:31:27 -0700209 entry->index = prt->source_index;
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 /*
212 * Type 1: Dynamic
213 * ---------------
214 * The 'source' field specifies the PCI interrupt link device used to
215 * configure the IRQ assigned to this slot|dev|pin. The 'source_index'
216 * indicates which resource descriptor in the resource template (of
217 * the link device) this interrupt is allocated from.
218 *
219 * NOTE: Don't query the Link Device for IRQ information at this time
220 * because Link Device enumeration may not have occurred yet
221 * (e.g. exists somewhere 'below' this _PRT entry in the ACPI
222 * namespace).
223 */
Bjorn Helgaas4eaf6db2008-12-08 21:31:27 -0700224 if (prt->source[0])
225 acpi_get_handle(handle, prt->source, &entry->link);
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 /*
228 * Type 2: Static
229 * --------------
230 * The 'source' field is NULL, and the 'source_index' field specifies
231 * the IRQ value, which is hardwired to specific interrupt inputs on
232 * the interrupt controller.
233 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
235 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO,
Bjorn Helgaas21a53282008-12-08 21:30:05 -0700236 " %04x:%02x:%02x[%c] -> %s[%d]\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400237 entry->id.segment, entry->id.bus,
Bjorn Helgaascf68b802008-12-08 21:30:36 -0700238 entry->id.device, pin_name(entry->pin),
Bjorn Helgaas4eaf6db2008-12-08 21:31:27 -0700239 prt->source, entry->index));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241 spin_lock(&acpi_prt_lock);
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -0700242 list_add_tail(&entry->list, &acpi_prt_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 spin_unlock(&acpi_prt_lock);
244
Patrick Mocheld550d982006-06-27 00:41:40 -0400245 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246}
247
Alexander Chiang859a3f82009-06-10 19:55:35 +0000248int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
Bjorn Helgaas2320ac62008-12-08 21:30:15 -0700250 acpi_status status;
251 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
252 struct acpi_pci_routing_table *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Bjorn Helgaas2320ac62008-12-08 21:30:15 -0700254 /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */
255 status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
256 if (ACPI_FAILURE(status))
257 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259 printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n",
Bjorn Helgaas2320ac62008-12-08 21:30:15 -0700260 (char *) buffer.pointer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
Bjorn Helgaas2320ac62008-12-08 21:30:15 -0700262 kfree(buffer.pointer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Bjorn Helgaas2320ac62008-12-08 21:30:15 -0700264 buffer.length = ACPI_ALLOCATE_BUFFER;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 buffer.pointer = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267 status = acpi_get_irq_routing_table(handle, &buffer);
268 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400269 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]",
270 acpi_format_exception(status)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400272 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 }
274
Bjorn Helgaas2320ac62008-12-08 21:30:15 -0700275 entry = buffer.pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 while (entry && (entry->length > 0)) {
Alexander Chiang859a3f82009-06-10 19:55:35 +0000277 acpi_pci_irq_add_entry(handle, bus, entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 entry = (struct acpi_pci_routing_table *)
Len Brown4be44fc2005-08-05 00:44:28 -0400279 ((unsigned long)entry + entry->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 }
281
Bjorn Helgaas2320ac62008-12-08 21:30:15 -0700282 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400283 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284}
285
Alexander Chiangd9efae32009-06-10 19:55:40 +0000286void acpi_pci_irq_del_prt(struct pci_bus *bus)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -0700288 struct acpi_prt_entry *entry, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Len Brown4be44fc2005-08-05 00:44:28 -0400290 printk(KERN_DEBUG
Bjorn Helgaas21a53282008-12-08 21:30:05 -0700291 "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n",
Alexander Chiangd9efae32009-06-10 19:55:40 +0000292 pci_domain_nr(bus), bus->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 spin_lock(&acpi_prt_lock);
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -0700294 list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) {
Alexander Chiangd9efae32009-06-10 19:55:40 +0000295 if (pci_domain_nr(bus) == entry->id.segment
296 && bus->number == entry->id.bus) {
Bjorn Helgaas3604a9f2008-12-08 21:31:21 -0700297 list_del(&entry->list);
298 kfree(entry);
299 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 }
301 spin_unlock(&acpi_prt_lock);
302}
Len Brown4be44fc2005-08-05 00:44:28 -0400303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304/* --------------------------------------------------------------------------
305 PCI Interrupt Routing Support
306 -------------------------------------------------------------------------- */
Bjorn Helgaas3f0f3c22008-12-08 21:31:37 -0700307static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308{
Bjorn Helgaasbeba8a62008-12-08 21:31:01 -0700309 struct acpi_prt_entry *entry;
Bjorn Helgaas5697b7c2008-12-08 21:31:16 -0700310 struct pci_dev *bridge;
311 u8 bridge_pin, orig_pin = pin;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Bjorn Helgaas063563b2008-12-08 21:30:51 -0700313 entry = acpi_pci_irq_find_prt_entry(dev, pin);
Bjorn Helgaas3b1ea182008-12-08 21:31:06 -0700314 if (entry) {
315 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n",
Bjorn Helgaas13504872008-12-08 21:30:56 -0700316 pci_name(dev), pin_name(pin)));
Bjorn Helgaas3b1ea182008-12-08 21:31:06 -0700317 return entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 }
Len Brown4be44fc2005-08-05 00:44:28 -0400319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 /*
321 * Attempt to derive an IRQ for this device from a parent bridge's
322 * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge).
323 */
Bjorn Helgaasee401362008-12-08 21:31:11 -0700324 bridge = dev->bus->self;
325 while (bridge) {
Bjorn Helgaasc686d142009-02-17 13:49:10 -0700326 pin = pci_swizzle_interrupt_pin(dev, pin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328 if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) {
329 /* PC card has the same IRQ as its cardbridge */
Kristen Accardi8015a012005-11-02 16:24:35 -0800330 bridge_pin = bridge->pin;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 if (!bridge_pin) {
Len Brown4be44fc2005-08-05 00:44:28 -0400332 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
333 "No interrupt pin configured for device %s\n",
334 pci_name(bridge)));
Bjorn Helgaasbeba8a62008-12-08 21:31:01 -0700335 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 pin = bridge_pin;
338 }
339
Bjorn Helgaas5697b7c2008-12-08 21:31:16 -0700340 entry = acpi_pci_irq_find_prt_entry(bridge, pin);
Bjorn Helgaas3b1ea182008-12-08 21:31:06 -0700341 if (entry) {
342 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
343 "Derived GSI for %s INT %c from %s\n",
344 pci_name(dev), pin_name(orig_pin),
345 pci_name(bridge)));
346 return entry;
347 }
Bjorn Helgaasee401362008-12-08 21:31:11 -0700348
349 dev = bridge;
350 bridge = dev->bus->self;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 }
352
Bjorn Helgaas3b1ea182008-12-08 21:31:06 -0700353 dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n",
354 pin_name(orig_pin));
355 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356}
357
Len Brown4be44fc2005-08-05 00:44:28 -0400358int acpi_pci_irq_enable(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Bjorn Helgaasbeba8a62008-12-08 21:31:01 -0700360 struct acpi_prt_entry *entry;
Bjorn Helgaas3f0f3c22008-12-08 21:31:37 -0700361 int gsi;
362 u8 pin;
Bob Moore50eca3e2005-09-30 19:03:00 -0400363 int triggering = ACPI_LEVEL_SENSITIVE;
364 int polarity = ACPI_ACTIVE_LOW;
Len Brown4be44fc2005-08-05 00:44:28 -0400365 char *link = NULL;
Bjorn Helgaasc83642d2008-06-27 08:45:39 -0600366 char link_desc[16];
Len Brown4be44fc2005-08-05 00:44:28 -0400367 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Kristen Accardi8015a012005-11-02 16:24:35 -0800369 pin = dev->pin;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 if (!pin) {
Len Brown4be44fc2005-08-05 00:44:28 -0400371 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
372 "No interrupt pin configured for device %s\n",
373 pci_name(dev)));
Patrick Mocheld550d982006-06-27 00:41:40 -0400374 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
Bjorn Helgaasbeba8a62008-12-08 21:31:01 -0700377 entry = acpi_pci_irq_lookup(dev, pin);
Bjorn Helgaas5697b7c2008-12-08 21:31:16 -0700378 if (!entry) {
Alan Cox96c2a872008-01-10 22:49:58 -0500379 /*
380 * IDE legacy mode controller IRQs are magic. Why do compat
381 * extensions always make such a nasty mess.
382 */
383 if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE &&
384 (dev->class & 0x05) == 0)
385 return 0;
386 }
Bjorn Helgaas5697b7c2008-12-08 21:31:16 -0700387
Bjorn Helgaas74f82af2008-12-08 21:31:32 -0700388 if (entry) {
389 if (entry->link)
390 gsi = acpi_pci_link_allocate_irq(entry->link,
391 entry->index,
392 &triggering, &polarity,
393 &link);
394 else
395 gsi = entry->index;
396 } else
Bjorn Helgaas5697b7c2008-12-08 21:31:16 -0700397 gsi = -1;
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 /*
400 * No IRQ known to the ACPI subsystem - maybe the BIOS /
401 * driver reported one, then use it. Exit in any case.
402 */
Bjorn Helgaasc13f8892008-12-08 21:30:26 -0700403 if (gsi < 0) {
Eric W. Biederman414d3442010-03-30 01:07:04 -0700404 u32 dev_gsi;
Bjorn Helgaascf68b802008-12-08 21:30:36 -0700405 dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 /* Interrupt Line values above 0xF are forbidden */
Eric W. Biederman414d3442010-03-30 01:07:04 -0700407 if (dev->irq > 0 && (dev->irq <= 0xF) &&
408 (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) {
409 printk(" - using ISA IRQ %d\n", dev->irq);
410 acpi_register_gsi(&dev->dev, dev_gsi,
Yinghai Lua2f809b2009-04-27 18:01:20 -0700411 ACPI_LEVEL_SENSITIVE,
Len Brown4be44fc2005-08-05 00:44:28 -0400412 ACPI_ACTIVE_LOW);
Patrick Mocheld550d982006-06-27 00:41:40 -0400413 return 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400414 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 printk("\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400416 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 }
Len Brown4be44fc2005-08-05 00:44:28 -0400418 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Yinghai Lua2f809b2009-04-27 18:01:20 -0700420 rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);
Kenji Kaneshige349f0d52005-07-28 14:42:00 -0400421 if (rc < 0) {
Bjorn Helgaasc83642d2008-06-27 08:45:39 -0600422 dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n",
Bjorn Helgaascf68b802008-12-08 21:30:36 -0700423 pin_name(pin));
Patrick Mocheld550d982006-06-27 00:41:40 -0400424 return rc;
Kenji Kaneshige349f0d52005-07-28 14:42:00 -0400425 }
426 dev->irq = rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 if (link)
Bjorn Helgaasc83642d2008-06-27 08:45:39 -0600429 snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link);
430 else
431 link_desc[0] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
Bjorn Helgaasc83642d2008-06-27 08:45:39 -0600433 dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n",
Bjorn Helgaascf68b802008-12-08 21:30:36 -0700434 pin_name(pin), link_desc, gsi,
Bjorn Helgaasc83642d2008-06-27 08:45:39 -0600435 (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge",
436 (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Patrick Mocheld550d982006-06-27 00:41:40 -0400438 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439}
Len Brown4be44fc2005-08-05 00:44:28 -0400440
David Shaohua Li87bec662005-07-27 23:02:00 -0400441/* FIXME: implement x86/x86_64 version */
Len Brown4be44fc2005-08-05 00:44:28 -0400442void __attribute__ ((weak)) acpi_unregister_gsi(u32 i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443{
Len Brown4be44fc2005-08-05 00:44:28 -0400444}
445
446void acpi_pci_irq_disable(struct pci_dev *dev)
447{
Bjorn Helgaasbeba8a62008-12-08 21:31:01 -0700448 struct acpi_prt_entry *entry;
Bjorn Helgaas3f0f3c22008-12-08 21:31:37 -0700449 int gsi;
450 u8 pin;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Kristen Accardi8015a012005-11-02 16:24:35 -0800452 pin = dev->pin;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 if (!pin)
Patrick Mocheld550d982006-06-27 00:41:40 -0400454 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Bjorn Helgaasbeba8a62008-12-08 21:31:01 -0700456 entry = acpi_pci_irq_lookup(dev, pin);
Bjorn Helgaasbeba8a62008-12-08 21:31:01 -0700457 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400458 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
Bjorn Helgaas74f82af2008-12-08 21:31:32 -0700460 if (entry->link)
461 gsi = acpi_pci_link_free_irq(entry->link);
462 else
463 gsi = entry->index;
Bjorn Helgaasbeba8a62008-12-08 21:31:01 -0700464
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 /*
466 * TBD: It might be worth clearing dev->irq by magic constant
467 * (e.g. PCI_UNDEFINED_IRQ).
468 */
469
Bjorn Helgaascf68b802008-12-08 21:30:36 -0700470 dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 acpi_unregister_gsi(gsi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472}