blob: eb500c2592ad8ab4ced728f676d9102411fa3782 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Low-Level PCI Support for PC -- Routing of Interrupts
3 *
4 * (c) 1999--2000 Martin Mares <mj@ucw.cz>
5 */
6
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/types.h>
8#include <linux/kernel.h>
9#include <linux/pci.h>
10#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/dmi.h>
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +020013#include <linux/io.h>
14#include <linux/smp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <asm/io_apic.h>
Nick Pigginb33fa1f2005-10-01 02:34:42 +100016#include <linux/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/acpi.h>
Jaswinder Singh Rajput82487712008-12-27 18:32:28 +053018#include <asm/pci_x86.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20#define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24))
21#define PIRQ_VERSION 0x0100
22
23static int broken_hp_bios_irq9;
24static int acer_tm360_irqrouting;
25
26static struct irq_routing_table *pirq_table;
27
28static int pirq_enable_irq(struct pci_dev *dev);
Jiang Liuc03b3b02014-06-09 16:20:08 +080029static void pirq_disable_irq(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31/*
32 * Never use: 0, 1, 2 (timer, keyboard, and cascade)
33 * Avoid using: 13, 14 and 15 (FP error and IDE).
34 * Penalize: 3, 4, 6, 7, 12 (known ISA uses: serial, floppy, parallel and mouse)
35 */
36unsigned int pcibios_irq_mask = 0xfff8;
37
38static int pirq_penalty[16] = {
39 1000000, 1000000, 1000000, 1000, 1000, 0, 1000, 1000,
40 0, 0, 0, 0, 1000, 100000, 100000, 100000
41};
42
43struct irq_router {
44 char *name;
45 u16 vendor, device;
46 int (*get)(struct pci_dev *router, struct pci_dev *dev, int pirq);
Miklos Vajna273c1122008-05-13 18:38:56 +020047 int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq,
48 int new);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049};
50
51struct irq_router_handler {
52 u16 vendor;
53 int (*probe)(struct irq_router *r, struct pci_dev *router, u16 device);
54};
55
Thomas Gleixnerab3b3792009-08-29 17:47:33 +020056int (*pcibios_enable_irq)(struct pci_dev *dev) = pirq_enable_irq;
Jiang Liuc03b3b02014-06-09 16:20:08 +080057void (*pcibios_disable_irq)(struct pci_dev *dev) = pirq_disable_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59/*
jayalk@intworks.biz120bb422005-03-21 20:20:42 -080060 * Check passed address for the PCI IRQ Routing Table signature
61 * and perform checksum verification.
62 */
63
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +020064static inline struct irq_routing_table *pirq_check_routing_table(u8 *addr)
jayalk@intworks.biz120bb422005-03-21 20:20:42 -080065{
66 struct irq_routing_table *rt;
67 int i;
68 u8 sum;
69
70 rt = (struct irq_routing_table *) addr;
71 if (rt->signature != PIRQ_SIGNATURE ||
72 rt->version != PIRQ_VERSION ||
73 rt->size % 16 ||
74 rt->size < sizeof(struct irq_routing_table))
75 return NULL;
76 sum = 0;
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +020077 for (i = 0; i < rt->size; i++)
jayalk@intworks.biz120bb422005-03-21 20:20:42 -080078 sum += addr[i];
79 if (!sum) {
Miklos Vajna273c1122008-05-13 18:38:56 +020080 DBG(KERN_DEBUG "PCI: Interrupt Routing Table found at 0x%p\n",
81 rt);
jayalk@intworks.biz120bb422005-03-21 20:20:42 -080082 return rt;
83 }
84 return NULL;
85}
86
87
88
89/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 * Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table.
91 */
92
93static struct irq_routing_table * __init pirq_find_routing_table(void)
94{
95 u8 *addr;
96 struct irq_routing_table *rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
jayalk@intworks.biz120bb422005-03-21 20:20:42 -080098 if (pirq_table_addr) {
99 rt = pirq_check_routing_table((u8 *) __va(pirq_table_addr));
100 if (rt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 return rt;
jayalk@intworks.biz120bb422005-03-21 20:20:42 -0800102 printk(KERN_WARNING "PCI: PIRQ table NOT found at pirqaddr\n");
103 }
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200104 for (addr = (u8 *) __va(0xf0000); addr < (u8 *) __va(0x100000); addr += 16) {
jayalk@intworks.biz120bb422005-03-21 20:20:42 -0800105 rt = pirq_check_routing_table(addr);
106 if (rt)
107 return rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 }
109 return NULL;
110}
111
112/*
113 * If we have a IRQ routing table, use it to search for peer host
114 * bridges. It's a gross hack, but since there are no other known
115 * ways how to get a list of buses, we have to go this way.
116 */
117
118static void __init pirq_peer_trick(void)
119{
120 struct irq_routing_table *rt = pirq_table;
121 u8 busmap[256];
122 int i;
123 struct irq_info *e;
124
125 memset(busmap, 0, sizeof(busmap));
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200126 for (i = 0; i < (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 e = &rt->slots[i];
128#ifdef DEBUG
129 {
130 int j;
Daniel Marjamäki81745512005-12-01 18:01:28 +0100131 DBG(KERN_DEBUG "%02x:%02x slot=%02x", e->bus, e->devfn/8, e->slot);
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200132 for (j = 0; j < 4; j++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 DBG(" %d:%02x/%04x", j, e->irq[j].link, e->irq[j].bitmap);
134 DBG("\n");
135 }
136#endif
137 busmap[e->bus] = 1;
138 }
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200139 for (i = 1; i < 256; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 if (!busmap[i] || pci_find_bus(0, i))
141 continue;
Bjorn Helgaas49886cf2014-01-28 16:40:36 -0700142 pcibios_scan_root(i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 }
144 pcibios_last_bus = -1;
145}
146
147/*
148 * Code for querying and setting of IRQ routes on various interrupt routers.
149 */
150
151void eisa_set_level_irq(unsigned int irq)
152{
153 unsigned char mask = 1 << (irq & 7);
154 unsigned int port = 0x4d0 + (irq >> 3);
155 unsigned char val;
156 static u16 eisa_irq_mask;
157
158 if (irq >= 16 || (1 << irq) & eisa_irq_mask)
159 return;
160
161 eisa_irq_mask |= (1 << irq);
Daniel Marjamäki81745512005-12-01 18:01:28 +0100162 printk(KERN_DEBUG "PCI: setting IRQ %u as level-triggered\n", irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 val = inb(port);
164 if (!(val & mask)) {
Daniel Marjamäki81745512005-12-01 18:01:28 +0100165 DBG(KERN_DEBUG " -> edge");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 outb(val | mask, port);
167 }
168}
169
170/*
Simon Arlott27b46d72007-10-20 01:13:56 +0200171 * Common IRQ routing practice: nibbles in config space,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 * offset by some magic constant.
173 */
174static unsigned int read_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr)
175{
176 u8 x;
177 unsigned reg = offset + (nr >> 1);
178
179 pci_read_config_byte(router, reg, &x);
180 return (nr & 1) ? (x >> 4) : (x & 0xf);
181}
182
Miklos Vajna273c1122008-05-13 18:38:56 +0200183static void write_config_nybble(struct pci_dev *router, unsigned offset,
184 unsigned nr, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185{
186 u8 x;
187 unsigned reg = offset + (nr >> 1);
188
189 pci_read_config_byte(router, reg, &x);
190 x = (nr & 1) ? ((x & 0x0f) | (val << 4)) : ((x & 0xf0) | val);
191 pci_write_config_byte(router, reg, x);
192}
193
194/*
195 * ALI pirq entries are damn ugly, and completely undocumented.
196 * This has been figured out from pirq tables, and it's not a pretty
197 * picture.
198 */
199static int pirq_ali_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
200{
Andreas Mohra0de1f02006-06-23 02:04:28 -0700201 static const unsigned char irqmap[16] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Björn Steinbrink223ac2f2008-03-31 04:22:53 +0200203 WARN_ON_ONCE(pirq > 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 return irqmap[read_config_nybble(router, 0x48, pirq-1)];
205}
206
207static int pirq_ali_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
208{
Andreas Mohra0de1f02006-06-23 02:04:28 -0700209 static const unsigned char irqmap[16] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 unsigned int val = irqmap[irq];
Ingo Molnar7d409d62008-01-30 13:32:00 +0100211
Björn Steinbrink223ac2f2008-03-31 04:22:53 +0200212 WARN_ON_ONCE(pirq > 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 if (val) {
214 write_config_nybble(router, 0x48, pirq-1, val);
215 return 1;
216 }
217 return 0;
218}
219
220/*
221 * The Intel PIIX4 pirq rules are fairly simple: "pirq" is
222 * just a pointer to the config space.
223 */
224static int pirq_piix_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
225{
226 u8 x;
227
228 pci_read_config_byte(router, pirq, &x);
229 return (x < 16) ? x : 0;
230}
231
232static int pirq_piix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
233{
234 pci_write_config_byte(router, pirq, irq);
235 return 1;
236}
237
238/*
239 * The VIA pirq rules are nibble-based, like ALI,
240 * but without the ugly irq number munging.
241 * However, PIRQD is in the upper instead of lower 4 bits.
242 */
243static int pirq_via_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
244{
245 return read_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq);
246}
247
248static int pirq_via_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
249{
250 write_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq, irq);
251 return 1;
252}
253
254/*
Aleksey Gorelov80bb82a2005-06-23 00:08:29 -0700255 * The VIA pirq rules are nibble-based, like ALI,
256 * but without the ugly irq number munging.
257 * However, for 82C586, nibble map is different .
258 */
259static int pirq_via586_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
260{
Daniel Ritzf3ac8432006-11-14 02:03:25 -0800261 static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 };
Ingo Molnar7d409d62008-01-30 13:32:00 +0100262
Björn Steinbrink223ac2f2008-03-31 04:22:53 +0200263 WARN_ON_ONCE(pirq > 5);
Aleksey Gorelov80bb82a2005-06-23 00:08:29 -0700264 return read_config_nybble(router, 0x55, pirqmap[pirq-1]);
265}
266
267static int pirq_via586_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
268{
Daniel Ritzf3ac8432006-11-14 02:03:25 -0800269 static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 };
Ingo Molnar7d409d62008-01-30 13:32:00 +0100270
Björn Steinbrink223ac2f2008-03-31 04:22:53 +0200271 WARN_ON_ONCE(pirq > 5);
Aleksey Gorelov80bb82a2005-06-23 00:08:29 -0700272 write_config_nybble(router, 0x55, pirqmap[pirq-1], irq);
273 return 1;
274}
275
276/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 * ITE 8330G pirq rules are nibble-based
278 * FIXME: pirqmap may be { 1, 0, 3, 2 },
279 * 2+3 are both mapped to irq 9 on my system
280 */
281static int pirq_ite_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
282{
Andreas Mohra0de1f02006-06-23 02:04:28 -0700283 static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
Ingo Molnar7d409d62008-01-30 13:32:00 +0100284
Björn Steinbrink223ac2f2008-03-31 04:22:53 +0200285 WARN_ON_ONCE(pirq > 4);
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200286 return read_config_nybble(router, 0x43, pirqmap[pirq-1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287}
288
289static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
290{
Andreas Mohra0de1f02006-06-23 02:04:28 -0700291 static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
Ingo Molnar7d409d62008-01-30 13:32:00 +0100292
Björn Steinbrink223ac2f2008-03-31 04:22:53 +0200293 WARN_ON_ONCE(pirq > 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 write_config_nybble(router, 0x43, pirqmap[pirq-1], irq);
295 return 1;
296}
297
298/*
299 * OPTI: high four bits are nibble pointer..
300 * I wonder what the low bits do?
301 */
302static int pirq_opti_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
303{
304 return read_config_nybble(router, 0xb8, pirq >> 4);
305}
306
307static int pirq_opti_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
308{
309 write_config_nybble(router, 0xb8, pirq >> 4, irq);
310 return 1;
311}
312
313/*
314 * Cyrix: nibble offset 0x5C
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200315 * 0x5C bits 7:4 is INTB bits 3:0 is INTA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 * 0x5D bits 7:4 is INTD bits 3:0 is INTC
317 */
318static int pirq_cyrix_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
319{
320 return read_config_nybble(router, 0x5C, (pirq-1)^1);
321}
322
323static int pirq_cyrix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
324{
325 write_config_nybble(router, 0x5C, (pirq-1)^1, irq);
326 return 1;
327}
328
329/*
330 * PIRQ routing for SiS 85C503 router used in several SiS chipsets.
331 * We have to deal with the following issues here:
332 * - vendors have different ideas about the meaning of link values
333 * - some onboard devices (integrated in the chipset) have special
334 * links and are thus routed differently (i.e. not via PCI INTA-INTD)
335 * - different revision of the router have a different layout for
336 * the routing registers, particularly for the onchip devices
337 *
338 * For all routing registers the common thing is we have one byte
339 * per routeable link which is defined as:
340 * bit 7 IRQ mapping enabled (0) or disabled (1)
341 * bits [6:4] reserved (sometimes used for onchip devices)
342 * bits [3:0] IRQ to map to
343 * allowed: 3-7, 9-12, 14-15
344 * reserved: 0, 1, 2, 8, 13
345 *
346 * The config-space registers located at 0x41/0x42/0x43/0x44 are
347 * always used to route the normal PCI INT A/B/C/D respectively.
348 * Apparently there are systems implementing PCI routing table using
349 * link values 0x01-0x04 and others using 0x41-0x44 for PCI INTA..D.
350 * We try our best to handle both link mappings.
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200351 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 * Currently (2003-05-21) it appears most SiS chipsets follow the
353 * definition of routing registers from the SiS-5595 southbridge.
354 * According to the SiS 5595 datasheets the revision id's of the
355 * router (ISA-bridge) should be 0x01 or 0xb0.
356 *
357 * Furthermore we've also seen lspci dumps with revision 0x00 and 0xb1.
358 * Looks like these are used in a number of SiS 5xx/6xx/7xx chipsets.
359 * They seem to work with the current routing code. However there is
360 * some concern because of the two USB-OHCI HCs (original SiS 5595
361 * had only one). YMMV.
362 *
363 * Onchip routing for router rev-id 0x01/0xb0 and probably 0x00/0xb1:
364 *
365 * 0x61: IDEIRQ:
366 * bits [6:5] must be written 01
367 * bit 4 channel-select primary (0), secondary (1)
368 *
369 * 0x62: USBIRQ:
370 * bit 6 OHCI function disabled (0), enabled (1)
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200371 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 * 0x6a: ACPI/SCI IRQ: bits 4-6 reserved
373 *
374 * 0x7e: Data Acq. Module IRQ - bits 4-6 reserved
375 *
376 * We support USBIRQ (in addition to INTA-INTD) and keep the
377 * IDE, ACPI and DAQ routing untouched as set by the BIOS.
378 *
379 * Currently the only reported exception is the new SiS 65x chipset
380 * which includes the SiS 69x southbridge. Here we have the 85C503
381 * router revision 0x04 and there are changes in the register layout
382 * mostly related to the different USB HCs with USB 2.0 support.
383 *
384 * Onchip routing for router rev-id 0x04 (try-and-error observation)
385 *
386 * 0x60/0x61/0x62/0x63: 1xEHCI and 3xOHCI (companion) USB-HCs
387 * bit 6-4 are probably unused, not like 5595
388 */
389
390#define PIRQ_SIS_IRQ_MASK 0x0f
391#define PIRQ_SIS_IRQ_DISABLE 0x80
392#define PIRQ_SIS_USB_ENABLE 0x40
393
394static int pirq_sis_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
395{
396 u8 x;
397 int reg;
398
399 reg = pirq;
400 if (reg >= 0x01 && reg <= 0x04)
401 reg += 0x40;
402 pci_read_config_byte(router, reg, &x);
403 return (x & PIRQ_SIS_IRQ_DISABLE) ? 0 : (x & PIRQ_SIS_IRQ_MASK);
404}
405
406static int pirq_sis_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
407{
408 u8 x;
409 int reg;
410
411 reg = pirq;
412 if (reg >= 0x01 && reg <= 0x04)
413 reg += 0x40;
414 pci_read_config_byte(router, reg, &x);
415 x &= ~(PIRQ_SIS_IRQ_MASK | PIRQ_SIS_IRQ_DISABLE);
416 x |= irq ? irq: PIRQ_SIS_IRQ_DISABLE;
417 pci_write_config_byte(router, reg, x);
418 return 1;
419}
420
421
422/*
423 * VLSI: nibble offset 0x74 - educated guess due to routing table and
424 * config space of VLSI 82C534 PCI-bridge/router (1004:0102)
425 * Tested on HP OmniBook 800 covering PIRQ 1, 2, 4, 8 for onboard
426 * devices, PIRQ 3 for non-pci(!) soundchip and (untested) PIRQ 6
427 * for the busbridge to the docking station.
428 */
429
430static int pirq_vlsi_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
431{
Ingo Molnar7d409d62008-01-30 13:32:00 +0100432 WARN_ON_ONCE(pirq >= 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 if (pirq > 8) {
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600434 dev_info(&dev->dev, "VLSI router PIRQ escape (%d)\n", pirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 return 0;
436 }
437 return read_config_nybble(router, 0x74, pirq-1);
438}
439
440static int pirq_vlsi_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
441{
Ingo Molnar7d409d62008-01-30 13:32:00 +0100442 WARN_ON_ONCE(pirq >= 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 if (pirq > 8) {
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600444 dev_info(&dev->dev, "VLSI router PIRQ escape (%d)\n", pirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 return 0;
446 }
447 write_config_nybble(router, 0x74, pirq-1, irq);
448 return 1;
449}
450
451/*
452 * ServerWorks: PCI interrupts mapped to system IRQ lines through Index
453 * and Redirect I/O registers (0x0c00 and 0x0c01). The Index register
454 * format is (PCIIRQ## | 0x10), e.g.: PCIIRQ10=0x1a. The Redirect
455 * register is a straight binary coding of desired PIC IRQ (low nibble).
456 *
457 * The 'link' value in the PIRQ table is already in the correct format
458 * for the Index register. There are some special index values:
459 * 0x00 for ACPI (SCI), 0x01 for USB, 0x02 for IDE0, 0x04 for IDE1,
460 * and 0x03 for SMBus.
461 */
462static int pirq_serverworks_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
463{
Alan Coxc11b68b2008-01-30 13:33:14 +0100464 outb(pirq, 0xc00);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 return inb(0xc01) & 0xf;
466}
467
Miklos Vajna273c1122008-05-13 18:38:56 +0200468static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev,
469 int pirq, int irq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470{
Alan Coxc11b68b2008-01-30 13:33:14 +0100471 outb(pirq, 0xc00);
472 outb(irq, 0xc01);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 return 1;
474}
475
476/* Support for AMD756 PCI IRQ Routing
477 * Jhon H. Caicedo <jhcaiced@osso.org.co>
478 * Jun/21/2001 0.2.0 Release, fixed to use "nybble" functions... (jhcaiced)
479 * Jun/19/2001 Alpha Release 0.1.0 (jhcaiced)
480 * The AMD756 pirq rules are nibble-based
481 * offset 0x56 0-3 PIRQA 4-7 PIRQB
482 * offset 0x57 0-3 PIRQC 4-7 PIRQD
483 */
484static int pirq_amd756_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
485{
486 u8 irq;
487 irq = 0;
488 if (pirq <= 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 irq = read_config_nybble(router, 0x56, pirq - 1);
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600490 dev_info(&dev->dev,
Bjorn Helgaasd768cb62008-08-25 15:44:59 -0600491 "AMD756: dev [%04x:%04x], router PIRQ %d get IRQ %d\n",
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600492 dev->vendor, dev->device, pirq, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 return irq;
494}
495
496static int pirq_amd756_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
497{
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600498 dev_info(&dev->dev,
Bjorn Helgaasd768cb62008-08-25 15:44:59 -0600499 "AMD756: dev [%04x:%04x], router PIRQ %d set IRQ %d\n",
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600500 dev->vendor, dev->device, pirq, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 if (pirq <= 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 write_config_nybble(router, 0x56, pirq - 1, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 return 1;
504}
505
Thomas Backlundb205f6b2007-08-10 14:42:15 -0700506/*
507 * PicoPower PT86C523
508 */
509static int pirq_pico_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
510{
511 outb(0x10 + ((pirq - 1) >> 1), 0x24);
512 return ((pirq - 1) & 1) ? (inb(0x26) >> 4) : (inb(0x26) & 0xf);
513}
514
515static int pirq_pico_set(struct pci_dev *router, struct pci_dev *dev, int pirq,
516 int irq)
517{
518 unsigned int x;
519 outb(0x10 + ((pirq - 1) >> 1), 0x24);
520 x = inb(0x26);
521 x = ((pirq - 1) & 1) ? ((x & 0x0f) | (irq << 4)) : ((x & 0xf0) | (irq));
522 outb(x, 0x26);
523 return 1;
524}
525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526#ifdef CONFIG_PCI_BIOS
527
528static int pirq_bios_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
529{
530 struct pci_dev *bridge;
531 int pin = pci_get_interrupt_pin(dev, &bridge);
Bjorn Helgaas878f2e52008-12-09 16:11:46 -0700532 return pcibios_set_irq_routing(bridge, pin - 1, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533}
534
535#endif
536
537static __init int intel_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
538{
Andreas Mohra0de1f02006-06-23 02:04:28 -0700539 static struct pci_device_id __initdata pirq_440gx[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_0) },
541 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_2) },
542 { },
543 };
544
545 /* 440GX has a proprietary PIRQ router -- don't use it */
546 if (pci_dev_present(pirq_440gx))
547 return 0;
548
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200549 switch (device) {
550 case PCI_DEVICE_ID_INTEL_82371FB_0:
551 case PCI_DEVICE_ID_INTEL_82371SB_0:
552 case PCI_DEVICE_ID_INTEL_82371AB_0:
553 case PCI_DEVICE_ID_INTEL_82371MX:
554 case PCI_DEVICE_ID_INTEL_82443MX_0:
555 case PCI_DEVICE_ID_INTEL_82801AA_0:
556 case PCI_DEVICE_ID_INTEL_82801AB_0:
557 case PCI_DEVICE_ID_INTEL_82801BA_0:
558 case PCI_DEVICE_ID_INTEL_82801BA_10:
559 case PCI_DEVICE_ID_INTEL_82801CA_0:
560 case PCI_DEVICE_ID_INTEL_82801CA_12:
561 case PCI_DEVICE_ID_INTEL_82801DB_0:
562 case PCI_DEVICE_ID_INTEL_82801E_0:
563 case PCI_DEVICE_ID_INTEL_82801EB_0:
564 case PCI_DEVICE_ID_INTEL_ESB_1:
565 case PCI_DEVICE_ID_INTEL_ICH6_0:
566 case PCI_DEVICE_ID_INTEL_ICH6_1:
567 case PCI_DEVICE_ID_INTEL_ICH7_0:
568 case PCI_DEVICE_ID_INTEL_ICH7_1:
569 case PCI_DEVICE_ID_INTEL_ICH7_30:
570 case PCI_DEVICE_ID_INTEL_ICH7_31:
Seth Heasley57064d22009-01-23 12:43:38 -0800571 case PCI_DEVICE_ID_INTEL_TGP_LPC:
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200572 case PCI_DEVICE_ID_INTEL_ESB2_0:
573 case PCI_DEVICE_ID_INTEL_ICH8_0:
574 case PCI_DEVICE_ID_INTEL_ICH8_1:
575 case PCI_DEVICE_ID_INTEL_ICH8_2:
576 case PCI_DEVICE_ID_INTEL_ICH8_3:
577 case PCI_DEVICE_ID_INTEL_ICH8_4:
578 case PCI_DEVICE_ID_INTEL_ICH9_0:
579 case PCI_DEVICE_ID_INTEL_ICH9_1:
580 case PCI_DEVICE_ID_INTEL_ICH9_2:
581 case PCI_DEVICE_ID_INTEL_ICH9_3:
582 case PCI_DEVICE_ID_INTEL_ICH9_4:
583 case PCI_DEVICE_ID_INTEL_ICH9_5:
Seth Heasleycb04e952010-10-04 13:27:14 -0700584 case PCI_DEVICE_ID_INTEL_EP80579_0:
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200585 case PCI_DEVICE_ID_INTEL_ICH10_0:
586 case PCI_DEVICE_ID_INTEL_ICH10_1:
587 case PCI_DEVICE_ID_INTEL_ICH10_2:
588 case PCI_DEVICE_ID_INTEL_ICH10_3:
Seth Heasley9b444b32010-11-17 12:12:08 -0700589 case PCI_DEVICE_ID_INTEL_PATSBURG_LPC_0:
590 case PCI_DEVICE_ID_INTEL_PATSBURG_LPC_1:
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200591 r->name = "PIIX/ICH";
592 r->get = pirq_piix_get;
593 r->set = pirq_piix_set;
594 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 }
Seth Heasley37a84ec2008-08-28 15:40:59 -0700596
Seth Heasleyc13ff2f2011-01-10 13:08:37 -0800597 if ((device >= PCI_DEVICE_ID_INTEL_5_3400_SERIES_LPC_MIN &&
598 device <= PCI_DEVICE_ID_INTEL_5_3400_SERIES_LPC_MAX)
599 || (device >= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MIN &&
600 device <= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MAX)
601 || (device >= PCI_DEVICE_ID_INTEL_DH89XXCC_LPC_MIN &&
Seth Heasleyc0a86a92011-04-19 16:35:15 -0700602 device <= PCI_DEVICE_ID_INTEL_DH89XXCC_LPC_MAX)
603 || (device >= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MIN &&
604 device <= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MAX)) {
Seth Heasley37a84ec2008-08-28 15:40:59 -0700605 r->name = "PIIX/ICH";
606 r->get = pirq_piix_get;
607 r->set = pirq_piix_set;
608 return 1;
609 }
610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 return 0;
612}
613
aleksey_gorelov@phoenix.com750deaa2005-10-30 14:59:36 -0800614static __init int via_router_probe(struct irq_router *r,
615 struct pci_dev *router, u16 device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616{
617 /* FIXME: We should move some of the quirk fixup stuff here */
Giancarlo Formicucciaac122592005-07-28 01:07:33 -0700618
aleksey_gorelov@phoenix.com750deaa2005-10-30 14:59:36 -0800619 /*
Simon Arlott27b46d72007-10-20 01:13:56 +0200620 * workarounds for some buggy BIOSes
aleksey_gorelov@phoenix.com750deaa2005-10-30 14:59:36 -0800621 */
622 if (device == PCI_DEVICE_ID_VIA_82C586_0) {
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200623 switch (router->device) {
aleksey_gorelov@phoenix.com750deaa2005-10-30 14:59:36 -0800624 case PCI_DEVICE_ID_VIA_82C686:
625 /*
626 * Asus k7m bios wrongly reports 82C686A
627 * as 586-compatible
628 */
629 device = PCI_DEVICE_ID_VIA_82C686;
630 break;
631 case PCI_DEVICE_ID_VIA_8235:
632 /**
633 * Asus a7v-x bios wrongly reports 8235
634 * as 586-compatible
635 */
636 device = PCI_DEVICE_ID_VIA_8235;
637 break;
Bertram Felgenhauer9f67fd52008-06-05 15:31:22 -0700638 case PCI_DEVICE_ID_VIA_8237:
639 /**
640 * Asus a7v600 bios wrongly reports 8237
641 * as 586-compatible
642 */
643 device = PCI_DEVICE_ID_VIA_8237;
644 break;
aleksey_gorelov@phoenix.com750deaa2005-10-30 14:59:36 -0800645 }
Giancarlo Formicucciaac122592005-07-28 01:07:33 -0700646 }
647
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200648 switch (device) {
aleksey_gorelov@phoenix.com750deaa2005-10-30 14:59:36 -0800649 case PCI_DEVICE_ID_VIA_82C586_0:
650 r->name = "VIA";
651 r->get = pirq_via586_get;
652 r->set = pirq_via586_set;
653 return 1;
654 case PCI_DEVICE_ID_VIA_82C596:
655 case PCI_DEVICE_ID_VIA_82C686:
656 case PCI_DEVICE_ID_VIA_8231:
Grzegorz Janoszka40d8b892006-03-21 11:57:19 +0100657 case PCI_DEVICE_ID_VIA_8233A:
aleksey_gorelov@phoenix.com750deaa2005-10-30 14:59:36 -0800658 case PCI_DEVICE_ID_VIA_8235:
Grzegorz Janoszka40d8b892006-03-21 11:57:19 +0100659 case PCI_DEVICE_ID_VIA_8237:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 /* FIXME: add new ones for 8233/5 */
aleksey_gorelov@phoenix.com750deaa2005-10-30 14:59:36 -0800661 r->name = "VIA";
662 r->get = pirq_via_get;
663 r->set = pirq_via_set;
664 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 }
666 return 0;
667}
668
669static __init int vlsi_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
670{
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200671 switch (device) {
672 case PCI_DEVICE_ID_VLSI_82C534:
673 r->name = "VLSI 82C534";
674 r->get = pirq_vlsi_get;
675 r->set = pirq_vlsi_set;
676 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 }
678 return 0;
679}
680
681
Miklos Vajna273c1122008-05-13 18:38:56 +0200682static __init int serverworks_router_probe(struct irq_router *r,
683 struct pci_dev *router, u16 device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684{
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200685 switch (device) {
686 case PCI_DEVICE_ID_SERVERWORKS_OSB4:
687 case PCI_DEVICE_ID_SERVERWORKS_CSB5:
688 r->name = "ServerWorks";
689 r->get = pirq_serverworks_get;
690 r->set = pirq_serverworks_set;
691 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 }
693 return 0;
694}
695
696static __init int sis_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
697{
698 if (device != PCI_DEVICE_ID_SI_503)
699 return 0;
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 r->name = "SIS";
702 r->get = pirq_sis_get;
703 r->set = pirq_sis_set;
704 return 1;
705}
706
707static __init int cyrix_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
708{
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200709 switch (device) {
710 case PCI_DEVICE_ID_CYRIX_5520:
711 r->name = "NatSemi";
712 r->get = pirq_cyrix_get;
713 r->set = pirq_cyrix_set;
714 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 }
716 return 0;
717}
718
719static __init int opti_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
720{
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200721 switch (device) {
722 case PCI_DEVICE_ID_OPTI_82C700:
723 r->name = "OPTI";
724 r->get = pirq_opti_get;
725 r->set = pirq_opti_set;
726 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 }
728 return 0;
729}
730
731static __init int ite_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
732{
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200733 switch (device) {
734 case PCI_DEVICE_ID_ITE_IT8330G_0:
735 r->name = "ITE";
736 r->get = pirq_ite_get;
737 r->set = pirq_ite_set;
738 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 }
740 return 0;
741}
742
743static __init int ali_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
744{
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200745 switch (device) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 case PCI_DEVICE_ID_AL_M1533:
747 case PCI_DEVICE_ID_AL_M1563:
Daniel Marjamäki81745512005-12-01 18:01:28 +0100748 r->name = "ALI";
749 r->get = pirq_ali_get;
750 r->set = pirq_ali_set;
751 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 }
753 return 0;
754}
755
756static __init int amd_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
757{
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200758 switch (device) {
759 case PCI_DEVICE_ID_AMD_VIPER_740B:
760 r->name = "AMD756";
761 break;
762 case PCI_DEVICE_ID_AMD_VIPER_7413:
763 r->name = "AMD766";
764 break;
765 case PCI_DEVICE_ID_AMD_VIPER_7443:
766 r->name = "AMD768";
767 break;
768 default:
769 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 }
771 r->get = pirq_amd756_get;
772 r->set = pirq_amd756_set;
773 return 1;
774}
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200775
Thomas Backlundb205f6b2007-08-10 14:42:15 -0700776static __init int pico_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
777{
778 switch (device) {
779 case PCI_DEVICE_ID_PICOPOWER_PT86C523:
780 r->name = "PicoPower PT86C523";
781 r->get = pirq_pico_get;
782 r->set = pirq_pico_set;
783 return 1;
784
785 case PCI_DEVICE_ID_PICOPOWER_PT86C523BBP:
786 r->name = "PicoPower PT86C523 rev. BB+";
787 r->get = pirq_pico_get;
788 r->set = pirq_pico_set;
789 return 1;
790 }
791 return 0;
792}
793
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794static __initdata struct irq_router_handler pirq_routers[] = {
795 { PCI_VENDOR_ID_INTEL, intel_router_probe },
796 { PCI_VENDOR_ID_AL, ali_router_probe },
797 { PCI_VENDOR_ID_ITE, ite_router_probe },
798 { PCI_VENDOR_ID_VIA, via_router_probe },
799 { PCI_VENDOR_ID_OPTI, opti_router_probe },
800 { PCI_VENDOR_ID_SI, sis_router_probe },
801 { PCI_VENDOR_ID_CYRIX, cyrix_router_probe },
802 { PCI_VENDOR_ID_VLSI, vlsi_router_probe },
803 { PCI_VENDOR_ID_SERVERWORKS, serverworks_router_probe },
804 { PCI_VENDOR_ID_AMD, amd_router_probe },
Thomas Backlundb205f6b2007-08-10 14:42:15 -0700805 { PCI_VENDOR_ID_PICOPOWER, pico_router_probe },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 /* Someone with docs needs to add the ATI Radeon IGP */
807 { 0, NULL }
808};
809static struct irq_router pirq_router;
810static struct pci_dev *pirq_router_dev;
811
812
813/*
814 * FIXME: should we have an option to say "generic for
815 * chipset" ?
816 */
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200817
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818static void __init pirq_find_router(struct irq_router *r)
819{
820 struct irq_routing_table *rt = pirq_table;
821 struct irq_router_handler *h;
822
823#ifdef CONFIG_PCI_BIOS
824 if (!rt->signature) {
825 printk(KERN_INFO "PCI: Using BIOS for IRQ routing\n");
826 r->set = pirq_bios_set;
827 r->name = "BIOS";
828 return;
829 }
830#endif
831
832 /* Default unless a driver reloads it */
833 r->name = "default";
834 r->get = NULL;
835 r->set = NULL;
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200836
Bjorn Helgaasd768cb62008-08-25 15:44:59 -0600837 DBG(KERN_DEBUG "PCI: Attempting to find IRQ router for [%04x:%04x]\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 rt->rtr_vendor, rt->rtr_device);
839
Alan Cox7cd8b682006-12-07 02:14:03 +0100840 pirq_router_dev = pci_get_bus_and_slot(rt->rtr_bus, rt->rtr_devfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 if (!pirq_router_dev) {
Daniel Marjamäki81745512005-12-01 18:01:28 +0100842 DBG(KERN_DEBUG "PCI: Interrupt router not found at "
843 "%02x:%02x\n", rt->rtr_bus, rt->rtr_devfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 return;
845 }
846
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200847 for (h = pirq_routers; h->vendor; h++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 /* First look for a router match */
Miklos Vajna273c1122008-05-13 18:38:56 +0200849 if (rt->rtr_vendor == h->vendor &&
850 h->probe(r, pirq_router_dev, rt->rtr_device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 break;
852 /* Fall back to a device match */
Miklos Vajna273c1122008-05-13 18:38:56 +0200853 if (pirq_router_dev->vendor == h->vendor &&
854 h->probe(r, pirq_router_dev, pirq_router_dev->device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 break;
856 }
Bjorn Helgaasd768cb62008-08-25 15:44:59 -0600857 dev_info(&pirq_router_dev->dev, "%s IRQ router [%04x:%04x]\n",
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600858 pirq_router.name,
859 pirq_router_dev->vendor, pirq_router_dev->device);
Alan Cox7cd8b682006-12-07 02:14:03 +0100860
861 /* The device remains referenced for the kernel lifetime */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862}
863
864static struct irq_info *pirq_get_info(struct pci_dev *dev)
865{
866 struct irq_routing_table *rt = pirq_table;
Miklos Vajna273c1122008-05-13 18:38:56 +0200867 int entries = (rt->size - sizeof(struct irq_routing_table)) /
868 sizeof(struct irq_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 struct irq_info *info;
870
871 for (info = rt->slots; entries--; info++)
Miklos Vajna273c1122008-05-13 18:38:56 +0200872 if (info->bus == dev->bus->number &&
873 PCI_SLOT(info->devfn) == PCI_SLOT(dev->devfn))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 return info;
875 return NULL;
876}
877
878static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
879{
880 u8 pin;
881 struct irq_info *info;
882 int i, pirq, newirq;
883 int irq = 0;
884 u32 mask;
885 struct irq_router *r = &pirq_router;
886 struct pci_dev *dev2 = NULL;
887 char *msg = NULL;
888
889 /* Find IRQ pin */
890 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
891 if (!pin) {
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600892 dev_dbg(&dev->dev, "no interrupt pin\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 return 0;
894 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895
Yinghai Lub9c61b702009-05-06 10:10:06 -0700896 if (io_apic_assign_pci_irqs)
897 return 0;
898
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 /* Find IRQ routing entry */
900
901 if (!pirq_table)
902 return 0;
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200903
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 info = pirq_get_info(dev);
905 if (!info) {
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600906 dev_dbg(&dev->dev, "PCI INT %c not found in routing table\n",
Bjorn Helgaasf672c392008-12-09 16:11:51 -0700907 'A' + pin - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 return 0;
909 }
Bjorn Helgaasf672c392008-12-09 16:11:51 -0700910 pirq = info->irq[pin - 1].link;
911 mask = info->irq[pin - 1].bitmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 if (!pirq) {
Bjorn Helgaasf672c392008-12-09 16:11:51 -0700913 dev_dbg(&dev->dev, "PCI INT %c not routed\n", 'A' + pin - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 return 0;
915 }
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600916 dev_dbg(&dev->dev, "PCI INT %c -> PIRQ %02x, mask %04x, excl %04x",
Bjorn Helgaasf672c392008-12-09 16:11:51 -0700917 'A' + pin - 1, pirq, mask, pirq_table->exclusive_irqs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 mask &= pcibios_irq_mask;
919
920 /* Work around broken HP Pavilion Notebooks which assign USB to
921 IRQ 9 even though it is actually wired to IRQ 11 */
922
923 if (broken_hp_bios_irq9 && pirq == 0x59 && dev->irq == 9) {
924 dev->irq = 11;
925 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11);
926 r->set(pirq_router_dev, dev, pirq, 11);
927 }
928
929 /* same for Acer Travelmate 360, but with CB and irq 11 -> 10 */
Miklos Vajna273c1122008-05-13 18:38:56 +0200930 if (acer_tm360_irqrouting && dev->irq == 11 &&
931 dev->vendor == PCI_VENDOR_ID_O2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 pirq = 0x68;
933 mask = 0x400;
934 dev->irq = r->get(pirq_router_dev, dev, pirq);
935 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
936 }
937
938 /*
939 * Find the best IRQ to assign: use the one
940 * reported by the device if possible.
941 */
942 newirq = dev->irq;
Linus Torvalds7ed409182006-01-06 08:43:16 -0800943 if (newirq && !((1 << newirq) & mask)) {
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200944 if (pci_probe & PCI_USE_PIRQ_MASK)
945 newirq = 0;
946 else
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600947 dev_warn(&dev->dev, "IRQ %d doesn't match PIRQ mask "
948 "%#x; try pci=usepirqmask\n", newirq, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 }
950 if (!newirq && assign) {
951 for (i = 0; i < 16; i++) {
952 if (!(mask & (1 << i)))
953 continue;
Miklos Vajna273c1122008-05-13 18:38:56 +0200954 if (pirq_penalty[i] < pirq_penalty[newirq] &&
955 can_request_irq(i, IRQF_SHARED))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 newirq = i;
957 }
958 }
Bjorn Helgaasf672c392008-12-09 16:11:51 -0700959 dev_dbg(&dev->dev, "PCI INT %c -> newirq %d", 'A' + pin - 1, newirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
961 /* Check if it is hardcoded */
962 if ((pirq & 0xf0) == 0xf0) {
963 irq = pirq & 0xf;
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600964 msg = "hardcoded";
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +0200965 } else if (r->get && (irq = r->get(pirq_router_dev, dev, pirq)) && \
966 ((!(pci_probe & PCI_USE_PIRQ_MASK)) || ((1 << irq) & mask))) {
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600967 msg = "found";
Linus Torvaldsafa024c2006-06-23 02:04:21 -0700968 eisa_set_level_irq(irq);
Miklos Vajna273c1122008-05-13 18:38:56 +0200969 } else if (newirq && r->set &&
970 (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 if (r->set(pirq_router_dev, dev, pirq, newirq)) {
972 eisa_set_level_irq(newirq);
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600973 msg = "assigned";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 irq = newirq;
975 }
976 }
977
978 if (!irq) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 if (newirq && mask == (1 << newirq)) {
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600980 msg = "guessed";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 irq = newirq;
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600982 } else {
983 dev_dbg(&dev->dev, "can't route interrupt\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 return 0;
Bjorn Helgaas12c0b202008-07-23 17:00:13 -0600985 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 }
Bjorn Helgaasf672c392008-12-09 16:11:51 -0700987 dev_info(&dev->dev, "%s PCI INT %c -> IRQ %d\n", msg, 'A' + pin - 1, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988
989 /* Update IRQ for all devices with the same pirq value */
Kulikov Vasiliy1f7979a2010-07-03 20:04:03 +0400990 for_each_pci_dev(dev2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 pci_read_config_byte(dev2, PCI_INTERRUPT_PIN, &pin);
992 if (!pin)
993 continue;
Bjorn Helgaasf672c392008-12-09 16:11:51 -0700994
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 info = pirq_get_info(dev2);
996 if (!info)
997 continue;
Bjorn Helgaasf672c392008-12-09 16:11:51 -0700998 if (info->irq[pin - 1].link == pirq) {
Miklos Vajna273c1122008-05-13 18:38:56 +0200999 /*
1000 * We refuse to override the dev->irq
1001 * information. Give a warning!
1002 */
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +02001003 if (dev2->irq && dev2->irq != irq && \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 (!(pci_probe & PCI_USE_PIRQ_MASK) || \
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +02001005 ((1 << dev2->irq) & mask))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006#ifndef CONFIG_PCI_MSI
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001007 dev_info(&dev2->dev, "IRQ routing conflict: "
1008 "have IRQ %d, want IRQ %d\n",
1009 dev2->irq, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010#endif
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +02001011 continue;
1012 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 dev2->irq = irq;
1014 pirq_penalty[irq]++;
1015 if (dev != dev2)
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001016 dev_info(&dev->dev, "sharing IRQ %d with %s\n",
1017 irq, pci_name(dev2));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 }
1019 }
1020 return 1;
1021}
1022
Thomas Gleixner9325a282009-08-29 17:51:26 +02001023void __init pcibios_fixup_irqs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024{
1025 struct pci_dev *dev = NULL;
1026 u8 pin;
1027
Daniel Marjamäki81745512005-12-01 18:01:28 +01001028 DBG(KERN_DEBUG "PCI: IRQ fixup\n");
Kulikov Vasiliy1f7979a2010-07-03 20:04:03 +04001029 for_each_pci_dev(dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 /*
Miklos Vajna273c1122008-05-13 18:38:56 +02001031 * If the BIOS has set an out of range IRQ number, just
1032 * ignore it. Also keep track of which IRQ's are
1033 * already in use.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 */
1035 if (dev->irq >= 16) {
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001036 dev_dbg(&dev->dev, "ignoring bogus IRQ %d\n", dev->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 dev->irq = 0;
1038 }
Miklos Vajna273c1122008-05-13 18:38:56 +02001039 /*
1040 * If the IRQ is already assigned to a PCI device,
1041 * ignore its ISA use penalty
1042 */
1043 if (pirq_penalty[dev->irq] >= 100 &&
1044 pirq_penalty[dev->irq] < 100000)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 pirq_penalty[dev->irq] = 0;
1046 pirq_penalty[dev->irq]++;
1047 }
1048
Yinghai Lub9c61b702009-05-06 10:10:06 -07001049 if (io_apic_assign_pci_irqs)
1050 return;
1051
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 dev = NULL;
Kulikov Vasiliy1f7979a2010-07-03 20:04:03 +04001053 for_each_pci_dev(dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
Bjorn Helgaas12b955f2008-12-09 16:11:57 -07001055 if (!pin)
1056 continue;
1057
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 /*
1059 * Still no IRQ? Try to lookup one...
1060 */
Bjorn Helgaas12b955f2008-12-09 16:11:57 -07001061 if (!dev->irq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 pcibios_lookup_irq(dev, 0);
1063 }
1064}
1065
1066/*
1067 * Work around broken HP Pavilion Notebooks which assign USB to
1068 * IRQ 9 even though it is actually wired to IRQ 11
1069 */
Jeff Garzik18552562007-10-03 15:15:40 -04001070static int __init fix_broken_hp_bios_irq9(const struct dmi_system_id *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071{
1072 if (!broken_hp_bios_irq9) {
1073 broken_hp_bios_irq9 = 1;
Miklos Vajna273c1122008-05-13 18:38:56 +02001074 printk(KERN_INFO "%s detected - fixing broken IRQ routing\n",
1075 d->ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 }
1077 return 0;
1078}
1079
1080/*
1081 * Work around broken Acer TravelMate 360 Notebooks which assign
1082 * Cardbus to IRQ 11 even though it is actually wired to IRQ 10
1083 */
Jeff Garzik18552562007-10-03 15:15:40 -04001084static int __init fix_acer_tm360_irqrouting(const struct dmi_system_id *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085{
1086 if (!acer_tm360_irqrouting) {
1087 acer_tm360_irqrouting = 1;
Miklos Vajna273c1122008-05-13 18:38:56 +02001088 printk(KERN_INFO "%s detected - fixing broken IRQ routing\n",
1089 d->ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 }
1091 return 0;
1092}
1093
1094static struct dmi_system_id __initdata pciirq_dmi_table[] = {
1095 {
1096 .callback = fix_broken_hp_bios_irq9,
1097 .ident = "HP Pavilion N5400 Series Laptop",
1098 .matches = {
1099 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1100 DMI_MATCH(DMI_BIOS_VERSION, "GE.M1.03"),
Miklos Vajna273c1122008-05-13 18:38:56 +02001101 DMI_MATCH(DMI_PRODUCT_VERSION,
1102 "HP Pavilion Notebook Model GE"),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
1104 },
1105 },
1106 {
1107 .callback = fix_acer_tm360_irqrouting,
1108 .ident = "Acer TravelMate 36x Laptop",
1109 .matches = {
1110 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1111 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1112 },
1113 },
1114 { }
1115};
1116
Thomas Gleixnerab3b3792009-08-29 17:47:33 +02001117void __init pcibios_irq_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118{
Daniel Marjamäki81745512005-12-01 18:01:28 +01001119 DBG(KERN_DEBUG "PCI: IRQ init\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120
Thomas Gleixnerab3b3792009-08-29 17:47:33 +02001121 if (raw_pci_ops == NULL)
1122 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
1124 dmi_check_system(pciirq_dmi_table);
1125
1126 pirq_table = pirq_find_routing_table();
1127
1128#ifdef CONFIG_PCI_BIOS
1129 if (!pirq_table && (pci_probe & PCI_BIOS_IRQ_SCAN))
1130 pirq_table = pcibios_get_irq_routing_table();
1131#endif
1132 if (pirq_table) {
1133 pirq_peer_trick();
1134 pirq_find_router(&pirq_router);
1135 if (pirq_table->exclusive_irqs) {
1136 int i;
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +02001137 for (i = 0; i < 16; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 if (!(pirq_table->exclusive_irqs & (1 << i)))
1139 pirq_penalty[i] += 100;
1140 }
Miklos Vajna273c1122008-05-13 18:38:56 +02001141 /*
1142 * If we're using the I/O APIC, avoid using the PCI IRQ
1143 * routing table
1144 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 if (io_apic_assign_pci_irqs)
1146 pirq_table = NULL;
1147 }
1148
Thomas Gleixner9325a282009-08-29 17:51:26 +02001149 x86_init.pci.fixup_irqs();
Yinghai Lub9c61b702009-05-06 10:10:06 -07001150
1151 if (io_apic_assign_pci_irqs && pci_routeirq) {
1152 struct pci_dev *dev = NULL;
1153 /*
1154 * PCI IRQ routing is set up by pci_enable_device(), but we
1155 * also do it here in case there are still broken drivers that
1156 * don't use pci_enable_device().
1157 */
1158 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
1159 for_each_pci_dev(dev)
1160 pirq_enable_irq(dev);
1161 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162}
1163
David Shaohua Lic9c3e452005-04-01 00:07:31 -05001164static void pirq_penalize_isa_irq(int irq, int active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165{
1166 /*
1167 * If any ISAPnP device reports an IRQ in its list of possible
1168 * IRQ's, we try to avoid assigning it to PCI devices.
1169 */
David Shaohua Lic9c3e452005-04-01 00:07:31 -05001170 if (irq < 16) {
1171 if (active)
1172 pirq_penalty[irq] += 1000;
1173 else
1174 pirq_penalty[irq] += 100;
1175 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176}
1177
David Shaohua Lic9c3e452005-04-01 00:07:31 -05001178void pcibios_penalize_isa_irq(int irq, int active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179{
Len Brown6153df7b2005-08-25 12:27:09 -04001180#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 if (!acpi_noirq)
David Shaohua Lic9c3e452005-04-01 00:07:31 -05001182 acpi_penalize_isa_irq(irq, active);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 else
1184#endif
David Shaohua Lic9c3e452005-04-01 00:07:31 -05001185 pirq_penalize_isa_irq(irq, active);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186}
1187
1188static int pirq_enable_irq(struct pci_dev *dev)
1189{
Jiang Liuc03b3b02014-06-09 16:20:08 +08001190 u8 pin = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191
1192 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
Yinghai Lub9c61b702009-05-06 10:10:06 -07001193 if (pin && !pcibios_lookup_irq(dev, 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 char *msg = "";
1195
Yinghai Lub9c61b702009-05-06 10:10:06 -07001196 if (!io_apic_assign_pci_irqs && dev->irq)
1197 return 0;
1198
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 if (io_apic_assign_pci_irqs) {
Yinghai Lub9c61b702009-05-06 10:10:06 -07001200#ifdef CONFIG_X86_IO_APIC
1201 struct pci_dev *temp_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 int irq;
Yinghai Lue5198072009-05-15 13:05:16 -07001203 struct io_apic_irq_attr irq_attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
Yinghai Lue20c06f2009-05-06 10:08:22 -07001205 irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
1206 PCI_SLOT(dev->devfn),
Yinghai Lue5198072009-05-15 13:05:16 -07001207 pin - 1, &irq_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 /*
1209 * Busses behind bridges are typically not listed in the MP-table.
1210 * In this case we have to look up the IRQ based on the parent bus,
1211 * parent slot, and pin number. The SMP code detects such bridged
1212 * busses itself so we should get into this branch reliably.
1213 */
1214 temp_dev = dev;
1215 while (irq < 0 && dev->bus->parent) { /* go back to the bridge */
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +02001216 struct pci_dev *bridge = dev->bus->self;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217
Bjorn Helgaasb1c86792008-12-09 16:12:37 -07001218 pin = pci_swizzle_interrupt_pin(dev, pin);
Paolo Ciarrocchi7058b062008-06-07 14:14:35 +02001219 irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
Yinghai Lue20c06f2009-05-06 10:08:22 -07001220 PCI_SLOT(bridge->devfn),
Yinghai Lue5198072009-05-15 13:05:16 -07001221 pin - 1, &irq_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 if (irq >= 0)
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001223 dev_warn(&dev->dev, "using bridge %s "
1224 "INT %c to get IRQ %d\n",
Bjorn Helgaasf672c392008-12-09 16:11:51 -07001225 pci_name(bridge), 'A' + pin - 1,
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001226 irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 dev = bridge;
1228 }
1229 dev = temp_dev;
1230 if (irq >= 0) {
Yinghai Lub9c61b702009-05-06 10:10:06 -07001231 dev->irq = irq;
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001232 dev_info(&dev->dev, "PCI->APIC IRQ transform: "
Bjorn Helgaasf672c392008-12-09 16:11:51 -07001233 "INT %c -> IRQ %d\n", 'A' + pin - 1, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 return 0;
1235 } else
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001236 msg = "; probably buggy MP table";
Yinghai Lub9c61b702009-05-06 10:10:06 -07001237#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 } else if (pci_probe & PCI_BIOS_IRQ_SCAN)
1239 msg = "";
1240 else
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001241 msg = "; please try using pci=biosirq";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
Miklos Vajna273c1122008-05-13 18:38:56 +02001243 /*
1244 * With IDE legacy devices the IRQ lookup failure is not
1245 * a problem..
1246 */
1247 if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE &&
1248 !(dev->class & 0x5))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 return 0;
1250
Bjorn Helgaas12c0b202008-07-23 17:00:13 -06001251 dev_warn(&dev->dev, "can't find IRQ for PCI INT %c%s\n",
Bjorn Helgaasf672c392008-12-09 16:11:51 -07001252 'A' + pin - 1, msg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 return 0;
1255}
Jiang Liuc03b3b02014-06-09 16:20:08 +08001256
1257static void pirq_disable_irq(struct pci_dev *dev)
1258{
Jiang Liu9eabc992014-08-29 17:26:23 +08001259 if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) &&
Jiang Liu3eec5952014-08-08 14:07:51 +08001260 dev->irq) {
Jiang Liuc03b3b02014-06-09 16:20:08 +08001261 mp_unmap_irq(dev->irq);
1262 dev->irq = 0;
1263 }
1264}