Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Intel IO-APIC support for multi-Pentium hosts. | |
3 | * | |
4 | * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar, Hajnalka Szabo | |
5 | * | |
6 | * Many thanks to Stig Venaas for trying out countless experimental | |
7 | * patches and reporting/debugging problems patiently! | |
8 | * | |
9 | * (c) 1999, Multiple IO-APIC support, developed by | |
10 | * Ken-ichi Yaku <yaku@css1.kbnes.nec.co.jp> and | |
11 | * Hidemi Kishimoto <kisimoto@css1.kbnes.nec.co.jp>, | |
12 | * further tested and cleaned up by Zach Brown <zab@redhat.com> | |
13 | * and Ingo Molnar <mingo@redhat.com> | |
14 | * | |
15 | * Fixes | |
16 | * Maciej W. Rozycki : Bits for genuine 82489DX APICs; | |
17 | * thanks to Eric Gilmore | |
18 | * and Rolf G. Tews | |
19 | * for testing these extensively | |
20 | * Paul Diefenbaugh : Added full ACPI support | |
21 | */ | |
22 | ||
23 | #include <linux/mm.h> | |
1da177e4 LT |
24 | #include <linux/interrupt.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/sched.h> | |
589e367f | 28 | #include <linux/pci.h> |
1da177e4 LT |
29 | #include <linux/mc146818rtc.h> |
30 | #include <linux/acpi.h> | |
31 | #include <linux/sysdev.h> | |
3b7d1921 | 32 | #include <linux/msi.h> |
95d77884 | 33 | #include <linux/htirq.h> |
ab688059 AK |
34 | #ifdef CONFIG_ACPI |
35 | #include <acpi/acpi_bus.h> | |
36 | #endif | |
1da177e4 | 37 | |
61014292 | 38 | #include <asm/idle.h> |
1da177e4 LT |
39 | #include <asm/io.h> |
40 | #include <asm/smp.h> | |
41 | #include <asm/desc.h> | |
42 | #include <asm/proto.h> | |
43 | #include <asm/mach_apic.h> | |
8d916406 | 44 | #include <asm/acpi.h> |
ca8642f6 | 45 | #include <asm/dma.h> |
3e4ff115 | 46 | #include <asm/nmi.h> |
589e367f | 47 | #include <asm/msidef.h> |
8b955b0d | 48 | #include <asm/hypertransport.h> |
1da177e4 | 49 | |
13a79503 EB |
50 | struct irq_cfg { |
51 | cpumask_t domain; | |
61014292 EB |
52 | cpumask_t old_domain; |
53 | unsigned move_cleanup_count; | |
13a79503 | 54 | u8 vector; |
61014292 | 55 | u8 move_in_progress : 1; |
13a79503 EB |
56 | }; |
57 | ||
58 | /* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */ | |
59 | struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = { | |
bc5e81a1 EB |
60 | [0] = { .domain = CPU_MASK_ALL, .vector = IRQ0_VECTOR, }, |
61 | [1] = { .domain = CPU_MASK_ALL, .vector = IRQ1_VECTOR, }, | |
62 | [2] = { .domain = CPU_MASK_ALL, .vector = IRQ2_VECTOR, }, | |
63 | [3] = { .domain = CPU_MASK_ALL, .vector = IRQ3_VECTOR, }, | |
64 | [4] = { .domain = CPU_MASK_ALL, .vector = IRQ4_VECTOR, }, | |
65 | [5] = { .domain = CPU_MASK_ALL, .vector = IRQ5_VECTOR, }, | |
66 | [6] = { .domain = CPU_MASK_ALL, .vector = IRQ6_VECTOR, }, | |
67 | [7] = { .domain = CPU_MASK_ALL, .vector = IRQ7_VECTOR, }, | |
68 | [8] = { .domain = CPU_MASK_ALL, .vector = IRQ8_VECTOR, }, | |
69 | [9] = { .domain = CPU_MASK_ALL, .vector = IRQ9_VECTOR, }, | |
70 | [10] = { .domain = CPU_MASK_ALL, .vector = IRQ10_VECTOR, }, | |
71 | [11] = { .domain = CPU_MASK_ALL, .vector = IRQ11_VECTOR, }, | |
72 | [12] = { .domain = CPU_MASK_ALL, .vector = IRQ12_VECTOR, }, | |
73 | [13] = { .domain = CPU_MASK_ALL, .vector = IRQ13_VECTOR, }, | |
74 | [14] = { .domain = CPU_MASK_ALL, .vector = IRQ14_VECTOR, }, | |
75 | [15] = { .domain = CPU_MASK_ALL, .vector = IRQ15_VECTOR, }, | |
13a79503 EB |
76 | }; |
77 | ||
dfbffdd8 | 78 | static int assign_irq_vector(int irq, cpumask_t mask); |
04b9267b | 79 | |
1da177e4 LT |
80 | #define __apicdebuginit __init |
81 | ||
82 | int sis_apic_bug; /* not actually supported, dummy for compile */ | |
83 | ||
14d98cad AK |
84 | static int no_timer_check; |
85 | ||
fea5f1e1 LT |
86 | static int disable_timer_pin_1 __initdata; |
87 | ||
88 | int timer_over_8254 __initdata = 1; | |
89 | ||
1008fddc EB |
90 | /* Where if anywhere is the i8259 connect in external int mode */ |
91 | static struct { int pin, apic; } ioapic_i8259 = { -1, -1 }; | |
92 | ||
1da177e4 | 93 | static DEFINE_SPINLOCK(ioapic_lock); |
70a0a535 | 94 | DEFINE_SPINLOCK(vector_lock); |
1da177e4 LT |
95 | |
96 | /* | |
97 | * # of IRQ routing registers | |
98 | */ | |
99 | int nr_ioapic_registers[MAX_IO_APICS]; | |
100 | ||
101 | /* | |
102 | * Rough estimation of how many shared IRQs there are, can | |
103 | * be changed anytime. | |
104 | */ | |
e273d140 | 105 | #define MAX_PLUS_SHARED_IRQS NR_IRQS |
1da177e4 LT |
106 | #define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS) |
107 | ||
108 | /* | |
109 | * This is performance-critical, we want to do it O(1) | |
110 | * | |
111 | * the indexing order of this array favors 1:1 mappings | |
112 | * between pins and IRQs. | |
113 | */ | |
114 | ||
115 | static struct irq_pin_list { | |
116 | short apic, pin, next; | |
117 | } irq_2_pin[PIN_MAP_SIZE]; | |
118 | ||
6c0ffb9d LT |
119 | struct io_apic { |
120 | unsigned int index; | |
121 | unsigned int unused[3]; | |
122 | unsigned int data; | |
123 | }; | |
124 | ||
125 | static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx) | |
126 | { | |
127 | return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx) | |
128 | + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK); | |
129 | } | |
130 | ||
131 | static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) | |
132 | { | |
133 | struct io_apic __iomem *io_apic = io_apic_base(apic); | |
134 | writel(reg, &io_apic->index); | |
135 | return readl(&io_apic->data); | |
136 | } | |
137 | ||
138 | static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value) | |
139 | { | |
140 | struct io_apic __iomem *io_apic = io_apic_base(apic); | |
141 | writel(reg, &io_apic->index); | |
142 | writel(value, &io_apic->data); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Re-write a value: to be used for read-modify-write | |
147 | * cycles where the read already set up the index register. | |
148 | */ | |
149 | static inline void io_apic_modify(unsigned int apic, unsigned int value) | |
150 | { | |
151 | struct io_apic __iomem *io_apic = io_apic_base(apic); | |
152 | writel(value, &io_apic->data); | |
153 | } | |
154 | ||
ef3e28c5 EB |
155 | static int io_apic_level_ack_pending(unsigned int irq) |
156 | { | |
157 | struct irq_pin_list *entry; | |
158 | unsigned long flags; | |
159 | int pending = 0; | |
160 | ||
161 | spin_lock_irqsave(&ioapic_lock, flags); | |
162 | entry = irq_2_pin + irq; | |
163 | for (;;) { | |
164 | unsigned int reg; | |
165 | int pin; | |
166 | ||
167 | pin = entry->pin; | |
168 | if (pin == -1) | |
169 | break; | |
170 | reg = io_apic_read(entry->apic, 0x10 + pin*2); | |
171 | /* Is the remote IRR bit set? */ | |
172 | pending |= (reg >> 14) & 1; | |
173 | if (!entry->next) | |
174 | break; | |
175 | entry = irq_2_pin + entry->next; | |
176 | } | |
177 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
178 | return pending; | |
179 | } | |
180 | ||
6c0ffb9d LT |
181 | /* |
182 | * Synchronize the IO-APIC and the CPU by doing | |
183 | * a dummy read from the IO-APIC | |
184 | */ | |
185 | static inline void io_apic_sync(unsigned int apic) | |
186 | { | |
187 | struct io_apic __iomem *io_apic = io_apic_base(apic); | |
188 | readl(&io_apic->data); | |
189 | } | |
190 | ||
54d5d424 AR |
191 | #define __DO_ACTION(R, ACTION, FINAL) \ |
192 | \ | |
193 | { \ | |
194 | int pin; \ | |
195 | struct irq_pin_list *entry = irq_2_pin + irq; \ | |
196 | \ | |
6004e1b7 | 197 | BUG_ON(irq >= NR_IRQS); \ |
54d5d424 AR |
198 | for (;;) { \ |
199 | unsigned int reg; \ | |
200 | pin = entry->pin; \ | |
201 | if (pin == -1) \ | |
202 | break; \ | |
203 | reg = io_apic_read(entry->apic, 0x10 + R + pin*2); \ | |
204 | reg ACTION; \ | |
205 | io_apic_modify(entry->apic, reg); \ | |
f45bcd70 | 206 | FINAL; \ |
54d5d424 AR |
207 | if (!entry->next) \ |
208 | break; \ | |
209 | entry = irq_2_pin + entry->next; \ | |
210 | } \ | |
54d5d424 AR |
211 | } |
212 | ||
eea0e11c AK |
213 | union entry_union { |
214 | struct { u32 w1, w2; }; | |
215 | struct IO_APIC_route_entry entry; | |
216 | }; | |
217 | ||
218 | static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin) | |
219 | { | |
220 | union entry_union eu; | |
221 | unsigned long flags; | |
222 | spin_lock_irqsave(&ioapic_lock, flags); | |
223 | eu.w1 = io_apic_read(apic, 0x10 + 2 * pin); | |
224 | eu.w2 = io_apic_read(apic, 0x11 + 2 * pin); | |
225 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
226 | return eu.entry; | |
227 | } | |
228 | ||
48797ebd LT |
229 | /* |
230 | * When we write a new IO APIC routing entry, we need to write the high | |
231 | * word first! If the mask bit in the low word is clear, we will enable | |
232 | * the interrupt, and we need to make sure the entry is fully populated | |
233 | * before that happens. | |
234 | */ | |
516d2836 AK |
235 | static void |
236 | __ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e) | |
eea0e11c | 237 | { |
eea0e11c AK |
238 | union entry_union eu; |
239 | eu.entry = e; | |
48797ebd LT |
240 | io_apic_write(apic, 0x11 + 2*pin, eu.w2); |
241 | io_apic_write(apic, 0x10 + 2*pin, eu.w1); | |
516d2836 AK |
242 | } |
243 | ||
244 | static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e) | |
245 | { | |
246 | unsigned long flags; | |
247 | spin_lock_irqsave(&ioapic_lock, flags); | |
248 | __ioapic_write_entry(apic, pin, e); | |
48797ebd LT |
249 | spin_unlock_irqrestore(&ioapic_lock, flags); |
250 | } | |
251 | ||
252 | /* | |
253 | * When we mask an IO APIC routing entry, we need to write the low | |
254 | * word first, in order to set the mask bit before we change the | |
255 | * high bits! | |
256 | */ | |
257 | static void ioapic_mask_entry(int apic, int pin) | |
258 | { | |
259 | unsigned long flags; | |
260 | union entry_union eu = { .entry.mask = 1 }; | |
261 | ||
eea0e11c AK |
262 | spin_lock_irqsave(&ioapic_lock, flags); |
263 | io_apic_write(apic, 0x10 + 2*pin, eu.w1); | |
264 | io_apic_write(apic, 0x11 + 2*pin, eu.w2); | |
265 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
266 | } | |
267 | ||
54d5d424 | 268 | #ifdef CONFIG_SMP |
550f2299 EB |
269 | static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, u8 vector) |
270 | { | |
271 | int apic, pin; | |
272 | struct irq_pin_list *entry = irq_2_pin + irq; | |
273 | ||
274 | BUG_ON(irq >= NR_IRQS); | |
275 | for (;;) { | |
276 | unsigned int reg; | |
277 | apic = entry->apic; | |
278 | pin = entry->pin; | |
279 | if (pin == -1) | |
280 | break; | |
281 | io_apic_write(apic, 0x11 + pin*2, dest); | |
282 | reg = io_apic_read(apic, 0x10 + pin*2); | |
283 | reg &= ~0x000000ff; | |
284 | reg |= vector; | |
285 | io_apic_modify(apic, reg); | |
286 | if (!entry->next) | |
287 | break; | |
288 | entry = irq_2_pin + entry->next; | |
289 | } | |
290 | } | |
291 | ||
54d5d424 AR |
292 | static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask) |
293 | { | |
dfbffdd8 | 294 | struct irq_cfg *cfg = irq_cfg + irq; |
54d5d424 AR |
295 | unsigned long flags; |
296 | unsigned int dest; | |
297 | cpumask_t tmp; | |
298 | ||
299 | cpus_and(tmp, mask, cpu_online_map); | |
300 | if (cpus_empty(tmp)) | |
5ff5115e | 301 | return; |
54d5d424 | 302 | |
dfbffdd8 | 303 | if (assign_irq_vector(irq, mask)) |
550f2299 EB |
304 | return; |
305 | ||
dfbffdd8 | 306 | cpus_and(tmp, cfg->domain, mask); |
550f2299 | 307 | dest = cpu_mask_to_apicid(tmp); |
54d5d424 AR |
308 | |
309 | /* | |
310 | * Only the high 8 bits are valid. | |
311 | */ | |
312 | dest = SET_APIC_LOGICAL_ID(dest); | |
313 | ||
314 | spin_lock_irqsave(&ioapic_lock, flags); | |
dfbffdd8 | 315 | __target_IO_APIC_irq(irq, dest, cfg->vector); |
9f0a5ba5 | 316 | irq_desc[irq].affinity = mask; |
54d5d424 AR |
317 | spin_unlock_irqrestore(&ioapic_lock, flags); |
318 | } | |
319 | #endif | |
320 | ||
1da177e4 LT |
321 | /* |
322 | * The common case is 1:1 IRQ<->pin mappings. Sometimes there are | |
323 | * shared ISA-space IRQs, so we have to support them. We are super | |
324 | * fast in the common case, and fast for shared ISA-space IRQs. | |
325 | */ | |
326 | static void add_pin_to_irq(unsigned int irq, int apic, int pin) | |
327 | { | |
328 | static int first_free_entry = NR_IRQS; | |
329 | struct irq_pin_list *entry = irq_2_pin + irq; | |
330 | ||
6004e1b7 | 331 | BUG_ON(irq >= NR_IRQS); |
1da177e4 LT |
332 | while (entry->next) |
333 | entry = irq_2_pin + entry->next; | |
334 | ||
335 | if (entry->pin != -1) { | |
336 | entry->next = first_free_entry; | |
337 | entry = irq_2_pin + entry->next; | |
338 | if (++first_free_entry >= PIN_MAP_SIZE) | |
6004e1b7 | 339 | panic("io_apic.c: ran out of irq_2_pin entries!"); |
1da177e4 LT |
340 | } |
341 | entry->apic = apic; | |
342 | entry->pin = pin; | |
343 | } | |
344 | ||
1da177e4 LT |
345 | |
346 | #define DO_ACTION(name,R,ACTION, FINAL) \ | |
347 | \ | |
348 | static void name##_IO_APIC_irq (unsigned int irq) \ | |
349 | __DO_ACTION(R, ACTION, FINAL) | |
350 | ||
351 | DO_ACTION( __mask, 0, |= 0x00010000, io_apic_sync(entry->apic) ) | |
352 | /* mask = 1 */ | |
353 | DO_ACTION( __unmask, 0, &= 0xfffeffff, ) | |
354 | /* mask = 0 */ | |
355 | ||
356 | static void mask_IO_APIC_irq (unsigned int irq) | |
357 | { | |
358 | unsigned long flags; | |
359 | ||
360 | spin_lock_irqsave(&ioapic_lock, flags); | |
361 | __mask_IO_APIC_irq(irq); | |
362 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
363 | } | |
364 | ||
365 | static void unmask_IO_APIC_irq (unsigned int irq) | |
366 | { | |
367 | unsigned long flags; | |
368 | ||
369 | spin_lock_irqsave(&ioapic_lock, flags); | |
370 | __unmask_IO_APIC_irq(irq); | |
371 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
372 | } | |
373 | ||
374 | static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin) | |
375 | { | |
376 | struct IO_APIC_route_entry entry; | |
1da177e4 LT |
377 | |
378 | /* Check delivery_mode to be sure we're not clearing an SMI pin */ | |
eea0e11c | 379 | entry = ioapic_read_entry(apic, pin); |
1da177e4 LT |
380 | if (entry.delivery_mode == dest_SMI) |
381 | return; | |
382 | /* | |
383 | * Disable it in the IO-APIC irq-routing table: | |
384 | */ | |
48797ebd | 385 | ioapic_mask_entry(apic, pin); |
1da177e4 LT |
386 | } |
387 | ||
388 | static void clear_IO_APIC (void) | |
389 | { | |
390 | int apic, pin; | |
391 | ||
392 | for (apic = 0; apic < nr_ioapics; apic++) | |
393 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) | |
394 | clear_IO_APIC_pin(apic, pin); | |
395 | } | |
396 | ||
1da177e4 LT |
397 | int skip_ioapic_setup; |
398 | int ioapic_force; | |
399 | ||
61ec7567 | 400 | static int __init parse_noapic(char *str) |
1da177e4 | 401 | { |
61ec7567 | 402 | disable_ioapic_setup(); |
2c8c0e6b | 403 | return 0; |
1da177e4 | 404 | } |
61ec7567 | 405 | early_param("noapic", parse_noapic); |
1da177e4 | 406 | |
fea5f1e1 LT |
407 | /* Actually the next is obsolete, but keep it for paranoid reasons -AK */ |
408 | static int __init disable_timer_pin_setup(char *arg) | |
409 | { | |
410 | disable_timer_pin_1 = 1; | |
411 | return 1; | |
412 | } | |
413 | __setup("disable_timer_pin_1", disable_timer_pin_setup); | |
414 | ||
415 | static int __init setup_disable_8254_timer(char *s) | |
416 | { | |
417 | timer_over_8254 = -1; | |
418 | return 1; | |
419 | } | |
420 | static int __init setup_enable_8254_timer(char *s) | |
421 | { | |
422 | timer_over_8254 = 2; | |
423 | return 1; | |
424 | } | |
425 | ||
426 | __setup("disable_8254_timer", setup_disable_8254_timer); | |
427 | __setup("enable_8254_timer", setup_enable_8254_timer); | |
428 | ||
429 | ||
1da177e4 LT |
430 | /* |
431 | * Find the IRQ entry number of a certain pin. | |
432 | */ | |
433 | static int find_irq_entry(int apic, int pin, int type) | |
434 | { | |
435 | int i; | |
436 | ||
437 | for (i = 0; i < mp_irq_entries; i++) | |
438 | if (mp_irqs[i].mpc_irqtype == type && | |
439 | (mp_irqs[i].mpc_dstapic == mp_ioapics[apic].mpc_apicid || | |
440 | mp_irqs[i].mpc_dstapic == MP_APIC_ALL) && | |
441 | mp_irqs[i].mpc_dstirq == pin) | |
442 | return i; | |
443 | ||
444 | return -1; | |
445 | } | |
446 | ||
447 | /* | |
448 | * Find the pin to which IRQ[irq] (ISA) is connected | |
449 | */ | |
1008fddc | 450 | static int __init find_isa_irq_pin(int irq, int type) |
1da177e4 LT |
451 | { |
452 | int i; | |
453 | ||
454 | for (i = 0; i < mp_irq_entries; i++) { | |
455 | int lbus = mp_irqs[i].mpc_srcbus; | |
456 | ||
55f05ffa | 457 | if (test_bit(lbus, mp_bus_not_pci) && |
1da177e4 LT |
458 | (mp_irqs[i].mpc_irqtype == type) && |
459 | (mp_irqs[i].mpc_srcbusirq == irq)) | |
460 | ||
461 | return mp_irqs[i].mpc_dstirq; | |
462 | } | |
463 | return -1; | |
464 | } | |
465 | ||
1008fddc EB |
466 | static int __init find_isa_irq_apic(int irq, int type) |
467 | { | |
468 | int i; | |
469 | ||
470 | for (i = 0; i < mp_irq_entries; i++) { | |
471 | int lbus = mp_irqs[i].mpc_srcbus; | |
472 | ||
55f05ffa | 473 | if (test_bit(lbus, mp_bus_not_pci) && |
1008fddc EB |
474 | (mp_irqs[i].mpc_irqtype == type) && |
475 | (mp_irqs[i].mpc_srcbusirq == irq)) | |
476 | break; | |
477 | } | |
478 | if (i < mp_irq_entries) { | |
479 | int apic; | |
480 | for(apic = 0; apic < nr_ioapics; apic++) { | |
481 | if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic) | |
482 | return apic; | |
483 | } | |
484 | } | |
485 | ||
486 | return -1; | |
487 | } | |
488 | ||
1da177e4 LT |
489 | /* |
490 | * Find a specific PCI IRQ entry. | |
491 | * Not an __init, possibly needed by modules | |
492 | */ | |
493 | static int pin_2_irq(int idx, int apic, int pin); | |
494 | ||
495 | int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin) | |
496 | { | |
497 | int apic, i, best_guess = -1; | |
498 | ||
499 | apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n", | |
500 | bus, slot, pin); | |
501 | if (mp_bus_id_to_pci_bus[bus] == -1) { | |
502 | apic_printk(APIC_VERBOSE, "PCI BIOS passed nonexistent PCI bus %d!\n", bus); | |
503 | return -1; | |
504 | } | |
505 | for (i = 0; i < mp_irq_entries; i++) { | |
506 | int lbus = mp_irqs[i].mpc_srcbus; | |
507 | ||
508 | for (apic = 0; apic < nr_ioapics; apic++) | |
509 | if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic || | |
510 | mp_irqs[i].mpc_dstapic == MP_APIC_ALL) | |
511 | break; | |
512 | ||
55f05ffa | 513 | if (!test_bit(lbus, mp_bus_not_pci) && |
1da177e4 LT |
514 | !mp_irqs[i].mpc_irqtype && |
515 | (bus == lbus) && | |
516 | (slot == ((mp_irqs[i].mpc_srcbusirq >> 2) & 0x1f))) { | |
517 | int irq = pin_2_irq(i,apic,mp_irqs[i].mpc_dstirq); | |
518 | ||
519 | if (!(apic || IO_APIC_IRQ(irq))) | |
520 | continue; | |
521 | ||
522 | if (pin == (mp_irqs[i].mpc_srcbusirq & 3)) | |
523 | return irq; | |
524 | /* | |
525 | * Use the first all-but-pin matching entry as a | |
526 | * best-guess fuzzy result for broken mptables. | |
527 | */ | |
528 | if (best_guess < 0) | |
529 | best_guess = irq; | |
530 | } | |
531 | } | |
6004e1b7 | 532 | BUG_ON(best_guess >= NR_IRQS); |
1da177e4 LT |
533 | return best_guess; |
534 | } | |
535 | ||
1da177e4 LT |
536 | /* ISA interrupts are always polarity zero edge triggered, |
537 | * when listed as conforming in the MP table. */ | |
538 | ||
539 | #define default_ISA_trigger(idx) (0) | |
540 | #define default_ISA_polarity(idx) (0) | |
541 | ||
542 | /* PCI interrupts are always polarity one level triggered, | |
543 | * when listed as conforming in the MP table. */ | |
544 | ||
545 | #define default_PCI_trigger(idx) (1) | |
546 | #define default_PCI_polarity(idx) (1) | |
547 | ||
1da177e4 LT |
548 | static int __init MPBIOS_polarity(int idx) |
549 | { | |
550 | int bus = mp_irqs[idx].mpc_srcbus; | |
551 | int polarity; | |
552 | ||
553 | /* | |
554 | * Determine IRQ line polarity (high active or low active): | |
555 | */ | |
556 | switch (mp_irqs[idx].mpc_irqflag & 3) | |
557 | { | |
558 | case 0: /* conforms, ie. bus-type dependent polarity */ | |
55f05ffa AK |
559 | if (test_bit(bus, mp_bus_not_pci)) |
560 | polarity = default_ISA_polarity(idx); | |
561 | else | |
562 | polarity = default_PCI_polarity(idx); | |
1da177e4 | 563 | break; |
1da177e4 LT |
564 | case 1: /* high active */ |
565 | { | |
566 | polarity = 0; | |
567 | break; | |
568 | } | |
569 | case 2: /* reserved */ | |
570 | { | |
571 | printk(KERN_WARNING "broken BIOS!!\n"); | |
572 | polarity = 1; | |
573 | break; | |
574 | } | |
575 | case 3: /* low active */ | |
576 | { | |
577 | polarity = 1; | |
578 | break; | |
579 | } | |
580 | default: /* invalid */ | |
581 | { | |
582 | printk(KERN_WARNING "broken BIOS!!\n"); | |
583 | polarity = 1; | |
584 | break; | |
585 | } | |
586 | } | |
587 | return polarity; | |
588 | } | |
589 | ||
590 | static int MPBIOS_trigger(int idx) | |
591 | { | |
592 | int bus = mp_irqs[idx].mpc_srcbus; | |
593 | int trigger; | |
594 | ||
595 | /* | |
596 | * Determine IRQ trigger mode (edge or level sensitive): | |
597 | */ | |
598 | switch ((mp_irqs[idx].mpc_irqflag>>2) & 3) | |
599 | { | |
600 | case 0: /* conforms, ie. bus-type dependent */ | |
55f05ffa AK |
601 | if (test_bit(bus, mp_bus_not_pci)) |
602 | trigger = default_ISA_trigger(idx); | |
603 | else | |
604 | trigger = default_PCI_trigger(idx); | |
1da177e4 | 605 | break; |
1da177e4 LT |
606 | case 1: /* edge */ |
607 | { | |
608 | trigger = 0; | |
609 | break; | |
610 | } | |
611 | case 2: /* reserved */ | |
612 | { | |
613 | printk(KERN_WARNING "broken BIOS!!\n"); | |
614 | trigger = 1; | |
615 | break; | |
616 | } | |
617 | case 3: /* level */ | |
618 | { | |
619 | trigger = 1; | |
620 | break; | |
621 | } | |
622 | default: /* invalid */ | |
623 | { | |
624 | printk(KERN_WARNING "broken BIOS!!\n"); | |
625 | trigger = 0; | |
626 | break; | |
627 | } | |
628 | } | |
629 | return trigger; | |
630 | } | |
631 | ||
632 | static inline int irq_polarity(int idx) | |
633 | { | |
634 | return MPBIOS_polarity(idx); | |
635 | } | |
636 | ||
637 | static inline int irq_trigger(int idx) | |
638 | { | |
639 | return MPBIOS_trigger(idx); | |
640 | } | |
641 | ||
642 | static int pin_2_irq(int idx, int apic, int pin) | |
643 | { | |
644 | int irq, i; | |
645 | int bus = mp_irqs[idx].mpc_srcbus; | |
646 | ||
647 | /* | |
648 | * Debugging check, we are in big trouble if this message pops up! | |
649 | */ | |
650 | if (mp_irqs[idx].mpc_dstirq != pin) | |
651 | printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n"); | |
652 | ||
55f05ffa AK |
653 | if (test_bit(bus, mp_bus_not_pci)) { |
654 | irq = mp_irqs[idx].mpc_srcbusirq; | |
655 | } else { | |
656 | /* | |
657 | * PCI IRQs are mapped in order | |
658 | */ | |
659 | i = irq = 0; | |
660 | while (i < apic) | |
661 | irq += nr_ioapic_registers[i++]; | |
662 | irq += pin; | |
1da177e4 | 663 | } |
6004e1b7 | 664 | BUG_ON(irq >= NR_IRQS); |
1da177e4 LT |
665 | return irq; |
666 | } | |
667 | ||
dfbffdd8 | 668 | static int __assign_irq_vector(int irq, cpumask_t mask) |
1da177e4 | 669 | { |
550f2299 EB |
670 | /* |
671 | * NOTE! The local APIC isn't very good at handling | |
672 | * multiple interrupts at the same interrupt level. | |
673 | * As the interrupt level is determined by taking the | |
674 | * vector number and shifting that right by 4, we | |
675 | * want to spread these out a bit so that they don't | |
676 | * all fall in the same interrupt level. | |
677 | * | |
678 | * Also, we've got to be careful not to trash gate | |
679 | * 0x80, because int 0x80 is hm, kind of importantish. ;) | |
680 | */ | |
d1752aa8 | 681 | static int current_vector = FIRST_DEVICE_VECTOR, current_offset = 0; |
dfbffdd8 | 682 | unsigned int old_vector; |
550f2299 | 683 | int cpu; |
13a79503 | 684 | struct irq_cfg *cfg; |
1da177e4 | 685 | |
e273d140 | 686 | BUG_ON((unsigned)irq >= NR_IRQS); |
13a79503 | 687 | cfg = &irq_cfg[irq]; |
0a1ad60d | 688 | |
70a0a535 EB |
689 | /* Only try and allocate irqs on cpus that are present */ |
690 | cpus_and(mask, mask, cpu_online_map); | |
691 | ||
61014292 EB |
692 | if ((cfg->move_in_progress) || cfg->move_cleanup_count) |
693 | return -EBUSY; | |
694 | ||
dfbffdd8 EB |
695 | old_vector = cfg->vector; |
696 | if (old_vector) { | |
697 | cpumask_t tmp; | |
698 | cpus_and(tmp, cfg->domain, mask); | |
699 | if (!cpus_empty(tmp)) | |
700 | return 0; | |
0a1ad60d | 701 | } |
550f2299 EB |
702 | |
703 | for_each_cpu_mask(cpu, mask) { | |
70a0a535 | 704 | cpumask_t domain, new_mask; |
61014292 | 705 | int new_cpu; |
550f2299 | 706 | int vector, offset; |
c7111c13 EB |
707 | |
708 | domain = vector_allocation_domain(cpu); | |
70a0a535 | 709 | cpus_and(new_mask, domain, cpu_online_map); |
c7111c13 | 710 | |
d1752aa8 EB |
711 | vector = current_vector; |
712 | offset = current_offset; | |
1da177e4 | 713 | next: |
550f2299 EB |
714 | vector += 8; |
715 | if (vector >= FIRST_SYSTEM_VECTOR) { | |
716 | /* If we run out of vectors on large boxen, must share them. */ | |
717 | offset = (offset + 1) % 8; | |
718 | vector = FIRST_DEVICE_VECTOR + offset; | |
719 | } | |
d1752aa8 | 720 | if (unlikely(current_vector == vector)) |
550f2299 EB |
721 | continue; |
722 | if (vector == IA32_SYSCALL_VECTOR) | |
723 | goto next; | |
70a0a535 | 724 | for_each_cpu_mask(new_cpu, new_mask) |
45edfd1d | 725 | if (per_cpu(vector_irq, new_cpu)[vector] != -1) |
c7111c13 | 726 | goto next; |
550f2299 | 727 | /* Found one! */ |
d1752aa8 EB |
728 | current_vector = vector; |
729 | current_offset = offset; | |
61014292 EB |
730 | if (old_vector) { |
731 | cfg->move_in_progress = 1; | |
732 | cfg->old_domain = cfg->domain; | |
733 | } | |
70a0a535 | 734 | for_each_cpu_mask(new_cpu, new_mask) |
c7111c13 | 735 | per_cpu(vector_irq, new_cpu)[vector] = irq; |
13a79503 EB |
736 | cfg->vector = vector; |
737 | cfg->domain = domain; | |
dfbffdd8 | 738 | return 0; |
1da177e4 | 739 | } |
550f2299 | 740 | return -ENOSPC; |
04b9267b EB |
741 | } |
742 | ||
dfbffdd8 | 743 | static int assign_irq_vector(int irq, cpumask_t mask) |
04b9267b | 744 | { |
dfbffdd8 | 745 | int err; |
04b9267b | 746 | unsigned long flags; |
0a1ad60d | 747 | |
04b9267b | 748 | spin_lock_irqsave(&vector_lock, flags); |
dfbffdd8 | 749 | err = __assign_irq_vector(irq, mask); |
26a3c49c | 750 | spin_unlock_irqrestore(&vector_lock, flags); |
dfbffdd8 | 751 | return err; |
1da177e4 LT |
752 | } |
753 | ||
5df0287e YL |
754 | static void __clear_irq_vector(int irq) |
755 | { | |
13a79503 | 756 | struct irq_cfg *cfg; |
5df0287e YL |
757 | cpumask_t mask; |
758 | int cpu, vector; | |
759 | ||
13a79503 EB |
760 | BUG_ON((unsigned)irq >= NR_IRQS); |
761 | cfg = &irq_cfg[irq]; | |
762 | BUG_ON(!cfg->vector); | |
5df0287e | 763 | |
13a79503 EB |
764 | vector = cfg->vector; |
765 | cpus_and(mask, cfg->domain, cpu_online_map); | |
5df0287e YL |
766 | for_each_cpu_mask(cpu, mask) |
767 | per_cpu(vector_irq, cpu)[vector] = -1; | |
768 | ||
13a79503 EB |
769 | cfg->vector = 0; |
770 | cfg->domain = CPU_MASK_NONE; | |
5df0287e YL |
771 | } |
772 | ||
70a0a535 EB |
773 | void __setup_vector_irq(int cpu) |
774 | { | |
775 | /* Initialize vector_irq on a new cpu */ | |
776 | /* This function must be called with vector_lock held */ | |
70a0a535 EB |
777 | int irq, vector; |
778 | ||
70a0a535 | 779 | /* Mark the inuse vectors */ |
e273d140 | 780 | for (irq = 0; irq < NR_IRQS; ++irq) { |
13a79503 | 781 | if (!cpu_isset(cpu, irq_cfg[irq].domain)) |
70a0a535 | 782 | continue; |
13a79503 | 783 | vector = irq_cfg[irq].vector; |
70a0a535 EB |
784 | per_cpu(vector_irq, cpu)[vector] = irq; |
785 | } | |
786 | /* Mark the free vectors */ | |
787 | for (vector = 0; vector < NR_VECTORS; ++vector) { | |
788 | irq = per_cpu(vector_irq, cpu)[vector]; | |
789 | if (irq < 0) | |
790 | continue; | |
13a79503 | 791 | if (!cpu_isset(cpu, irq_cfg[irq].domain)) |
70a0a535 EB |
792 | per_cpu(vector_irq, cpu)[vector] = -1; |
793 | } | |
794 | } | |
795 | ||
796 | ||
f29bd1ba | 797 | static struct irq_chip ioapic_chip; |
1da177e4 | 798 | |
a27bc06d | 799 | static void ioapic_register_intr(int irq, unsigned long trigger) |
1da177e4 | 800 | { |
cc75b92d TG |
801 | if (trigger) { |
802 | irq_desc[irq].status |= IRQ_LEVEL; | |
a460e745 IM |
803 | set_irq_chip_and_handler_name(irq, &ioapic_chip, |
804 | handle_fasteoi_irq, "fasteoi"); | |
cc75b92d TG |
805 | } else { |
806 | irq_desc[irq].status &= ~IRQ_LEVEL; | |
a460e745 IM |
807 | set_irq_chip_and_handler_name(irq, &ioapic_chip, |
808 | handle_edge_irq, "edge"); | |
cc75b92d | 809 | } |
1da177e4 | 810 | } |
a8c8a367 EB |
811 | |
812 | static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq, | |
813 | int trigger, int polarity) | |
1da177e4 | 814 | { |
dfbffdd8 | 815 | struct irq_cfg *cfg = irq_cfg + irq; |
1da177e4 | 816 | struct IO_APIC_route_entry entry; |
a8c8a367 | 817 | cpumask_t mask; |
1da177e4 | 818 | |
a8c8a367 EB |
819 | if (!IO_APIC_IRQ(irq)) |
820 | return; | |
821 | ||
dfbffdd8 EB |
822 | mask = TARGET_CPUS; |
823 | if (assign_irq_vector(irq, mask)) | |
a8c8a367 EB |
824 | return; |
825 | ||
dfbffdd8 EB |
826 | cpus_and(mask, cfg->domain, mask); |
827 | ||
a8c8a367 EB |
828 | apic_printk(APIC_VERBOSE,KERN_DEBUG |
829 | "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> " | |
830 | "IRQ %d Mode:%i Active:%i)\n", | |
dfbffdd8 | 831 | apic, mp_ioapics[apic].mpc_apicid, pin, cfg->vector, |
a8c8a367 | 832 | irq, trigger, polarity); |
1da177e4 | 833 | |
ad892f5e YL |
834 | /* |
835 | * add it to the IO-APIC irq-routing table: | |
836 | */ | |
837 | memset(&entry,0,sizeof(entry)); | |
1da177e4 | 838 | |
ad892f5e YL |
839 | entry.delivery_mode = INT_DELIVERY_MODE; |
840 | entry.dest_mode = INT_DEST_MODE; | |
a8c8a367 | 841 | entry.dest = cpu_mask_to_apicid(mask); |
ad892f5e | 842 | entry.mask = 0; /* enable IRQ */ |
a8c8a367 EB |
843 | entry.trigger = trigger; |
844 | entry.polarity = polarity; | |
dfbffdd8 | 845 | entry.vector = cfg->vector; |
1da177e4 | 846 | |
a8c8a367 EB |
847 | /* Mask level triggered irqs. |
848 | * Use IRQ_DELAYED_DISABLE for edge triggered irqs. | |
849 | */ | |
850 | if (trigger) | |
ad892f5e | 851 | entry.mask = 1; |
ad892f5e | 852 | |
a8c8a367 EB |
853 | ioapic_register_intr(irq, trigger); |
854 | if (irq < 16) | |
855 | disable_8259A_irq(irq); | |
ad892f5e YL |
856 | |
857 | ioapic_write_entry(apic, pin, entry); | |
ad892f5e YL |
858 | } |
859 | ||
860 | static void __init setup_IO_APIC_irqs(void) | |
861 | { | |
862 | int apic, pin, idx, irq, first_notcon = 1; | |
863 | ||
864 | apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n"); | |
865 | ||
866 | for (apic = 0; apic < nr_ioapics; apic++) { | |
867 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { | |
1da177e4 LT |
868 | |
869 | idx = find_irq_entry(apic,pin,mp_INT); | |
870 | if (idx == -1) { | |
871 | if (first_notcon) { | |
872 | apic_printk(APIC_VERBOSE, KERN_DEBUG " IO-APIC (apicid-pin) %d-%d", mp_ioapics[apic].mpc_apicid, pin); | |
873 | first_notcon = 0; | |
874 | } else | |
875 | apic_printk(APIC_VERBOSE, ", %d-%d", mp_ioapics[apic].mpc_apicid, pin); | |
876 | continue; | |
877 | } | |
878 | ||
1da177e4 LT |
879 | irq = pin_2_irq(idx, apic, pin); |
880 | add_pin_to_irq(irq, apic, pin); | |
881 | ||
a8c8a367 EB |
882 | setup_IO_APIC_irq(apic, pin, irq, |
883 | irq_trigger(idx), irq_polarity(idx)); | |
1da177e4 LT |
884 | } |
885 | } | |
886 | ||
887 | if (!first_notcon) | |
888 | apic_printk(APIC_VERBOSE," not connected.\n"); | |
889 | } | |
890 | ||
891 | /* | |
892 | * Set up the 8259A-master output pin as broadcast to all | |
893 | * CPUs. | |
894 | */ | |
1008fddc | 895 | static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, int vector) |
1da177e4 LT |
896 | { |
897 | struct IO_APIC_route_entry entry; | |
898 | unsigned long flags; | |
899 | ||
900 | memset(&entry,0,sizeof(entry)); | |
901 | ||
902 | disable_8259A_irq(0); | |
903 | ||
904 | /* mask LVT0 */ | |
11a8e778 | 905 | apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT); |
1da177e4 LT |
906 | |
907 | /* | |
908 | * We use logical delivery to get the timer IRQ | |
909 | * to the first CPU. | |
910 | */ | |
911 | entry.dest_mode = INT_DEST_MODE; | |
912 | entry.mask = 0; /* unmask IRQ now */ | |
ee4eff6f | 913 | entry.dest = cpu_mask_to_apicid(TARGET_CPUS); |
1da177e4 LT |
914 | entry.delivery_mode = INT_DELIVERY_MODE; |
915 | entry.polarity = 0; | |
916 | entry.trigger = 0; | |
917 | entry.vector = vector; | |
918 | ||
919 | /* | |
920 | * The timer IRQ doesn't have to know that behind the | |
921 | * scene we have a 8259A-master in AEOI mode ... | |
922 | */ | |
a460e745 | 923 | set_irq_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, "edge"); |
1da177e4 LT |
924 | |
925 | /* | |
926 | * Add it to the IO-APIC irq-routing table: | |
927 | */ | |
928 | spin_lock_irqsave(&ioapic_lock, flags); | |
1008fddc EB |
929 | io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1)); |
930 | io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0)); | |
1da177e4 LT |
931 | spin_unlock_irqrestore(&ioapic_lock, flags); |
932 | ||
933 | enable_8259A_irq(0); | |
934 | } | |
935 | ||
1da177e4 LT |
936 | void __apicdebuginit print_IO_APIC(void) |
937 | { | |
938 | int apic, i; | |
939 | union IO_APIC_reg_00 reg_00; | |
940 | union IO_APIC_reg_01 reg_01; | |
941 | union IO_APIC_reg_02 reg_02; | |
942 | unsigned long flags; | |
943 | ||
944 | if (apic_verbosity == APIC_QUIET) | |
945 | return; | |
946 | ||
947 | printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries); | |
948 | for (i = 0; i < nr_ioapics; i++) | |
949 | printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n", | |
950 | mp_ioapics[i].mpc_apicid, nr_ioapic_registers[i]); | |
951 | ||
952 | /* | |
953 | * We are a bit conservative about what we expect. We have to | |
954 | * know about every hardware change ASAP. | |
955 | */ | |
956 | printk(KERN_INFO "testing the IO APIC.......................\n"); | |
957 | ||
958 | for (apic = 0; apic < nr_ioapics; apic++) { | |
959 | ||
960 | spin_lock_irqsave(&ioapic_lock, flags); | |
961 | reg_00.raw = io_apic_read(apic, 0); | |
962 | reg_01.raw = io_apic_read(apic, 1); | |
963 | if (reg_01.bits.version >= 0x10) | |
964 | reg_02.raw = io_apic_read(apic, 2); | |
965 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
966 | ||
967 | printk("\n"); | |
968 | printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mpc_apicid); | |
969 | printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw); | |
970 | printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID); | |
1da177e4 LT |
971 | |
972 | printk(KERN_DEBUG ".... register #01: %08X\n", *(int *)®_01); | |
973 | printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries); | |
1da177e4 LT |
974 | |
975 | printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ); | |
976 | printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version); | |
1da177e4 LT |
977 | |
978 | if (reg_01.bits.version >= 0x10) { | |
979 | printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw); | |
980 | printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration); | |
1da177e4 LT |
981 | } |
982 | ||
983 | printk(KERN_DEBUG ".... IRQ redirection table:\n"); | |
984 | ||
ee4eff6f BR |
985 | printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol" |
986 | " Stat Dmod Deli Vect: \n"); | |
1da177e4 LT |
987 | |
988 | for (i = 0; i <= reg_01.bits.entries; i++) { | |
989 | struct IO_APIC_route_entry entry; | |
990 | ||
eea0e11c | 991 | entry = ioapic_read_entry(apic, i); |
1da177e4 | 992 | |
ee4eff6f | 993 | printk(KERN_DEBUG " %02x %03X ", |
1da177e4 | 994 | i, |
ee4eff6f | 995 | entry.dest |
1da177e4 LT |
996 | ); |
997 | ||
998 | printk("%1d %1d %1d %1d %1d %1d %1d %02X\n", | |
999 | entry.mask, | |
1000 | entry.trigger, | |
1001 | entry.irr, | |
1002 | entry.polarity, | |
1003 | entry.delivery_status, | |
1004 | entry.dest_mode, | |
1005 | entry.delivery_mode, | |
1006 | entry.vector | |
1007 | ); | |
1008 | } | |
1009 | } | |
1da177e4 LT |
1010 | printk(KERN_DEBUG "IRQ to pin mappings:\n"); |
1011 | for (i = 0; i < NR_IRQS; i++) { | |
1012 | struct irq_pin_list *entry = irq_2_pin + i; | |
1013 | if (entry->pin < 0) | |
1014 | continue; | |
04b9267b | 1015 | printk(KERN_DEBUG "IRQ%d ", i); |
1da177e4 LT |
1016 | for (;;) { |
1017 | printk("-> %d:%d", entry->apic, entry->pin); | |
1018 | if (!entry->next) | |
1019 | break; | |
1020 | entry = irq_2_pin + entry->next; | |
1021 | } | |
1022 | printk("\n"); | |
1023 | } | |
1024 | ||
1025 | printk(KERN_INFO ".................................... done.\n"); | |
1026 | ||
1027 | return; | |
1028 | } | |
1029 | ||
1030 | #if 0 | |
1031 | ||
1032 | static __apicdebuginit void print_APIC_bitfield (int base) | |
1033 | { | |
1034 | unsigned int v; | |
1035 | int i, j; | |
1036 | ||
1037 | if (apic_verbosity == APIC_QUIET) | |
1038 | return; | |
1039 | ||
1040 | printk(KERN_DEBUG "0123456789abcdef0123456789abcdef\n" KERN_DEBUG); | |
1041 | for (i = 0; i < 8; i++) { | |
1042 | v = apic_read(base + i*0x10); | |
1043 | for (j = 0; j < 32; j++) { | |
1044 | if (v & (1<<j)) | |
1045 | printk("1"); | |
1046 | else | |
1047 | printk("0"); | |
1048 | } | |
1049 | printk("\n"); | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | void __apicdebuginit print_local_APIC(void * dummy) | |
1054 | { | |
1055 | unsigned int v, ver, maxlvt; | |
1056 | ||
1057 | if (apic_verbosity == APIC_QUIET) | |
1058 | return; | |
1059 | ||
1060 | printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n", | |
1061 | smp_processor_id(), hard_smp_processor_id()); | |
1062 | v = apic_read(APIC_ID); | |
1063 | printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, GET_APIC_ID(v)); | |
1064 | v = apic_read(APIC_LVR); | |
1065 | printk(KERN_INFO "... APIC VERSION: %08x\n", v); | |
1066 | ver = GET_APIC_VERSION(v); | |
1067 | maxlvt = get_maxlvt(); | |
1068 | ||
1069 | v = apic_read(APIC_TASKPRI); | |
1070 | printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK); | |
1071 | ||
5a40b7c2 AK |
1072 | v = apic_read(APIC_ARBPRI); |
1073 | printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v, | |
1074 | v & APIC_ARBPRI_MASK); | |
1075 | v = apic_read(APIC_PROCPRI); | |
1076 | printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v); | |
1da177e4 LT |
1077 | |
1078 | v = apic_read(APIC_EOI); | |
1079 | printk(KERN_DEBUG "... APIC EOI: %08x\n", v); | |
1080 | v = apic_read(APIC_RRR); | |
1081 | printk(KERN_DEBUG "... APIC RRR: %08x\n", v); | |
1082 | v = apic_read(APIC_LDR); | |
1083 | printk(KERN_DEBUG "... APIC LDR: %08x\n", v); | |
1084 | v = apic_read(APIC_DFR); | |
1085 | printk(KERN_DEBUG "... APIC DFR: %08x\n", v); | |
1086 | v = apic_read(APIC_SPIV); | |
1087 | printk(KERN_DEBUG "... APIC SPIV: %08x\n", v); | |
1088 | ||
1089 | printk(KERN_DEBUG "... APIC ISR field:\n"); | |
1090 | print_APIC_bitfield(APIC_ISR); | |
1091 | printk(KERN_DEBUG "... APIC TMR field:\n"); | |
1092 | print_APIC_bitfield(APIC_TMR); | |
1093 | printk(KERN_DEBUG "... APIC IRR field:\n"); | |
1094 | print_APIC_bitfield(APIC_IRR); | |
1095 | ||
5a40b7c2 AK |
1096 | v = apic_read(APIC_ESR); |
1097 | printk(KERN_DEBUG "... APIC ESR: %08x\n", v); | |
1da177e4 LT |
1098 | |
1099 | v = apic_read(APIC_ICR); | |
1100 | printk(KERN_DEBUG "... APIC ICR: %08x\n", v); | |
1101 | v = apic_read(APIC_ICR2); | |
1102 | printk(KERN_DEBUG "... APIC ICR2: %08x\n", v); | |
1103 | ||
1104 | v = apic_read(APIC_LVTT); | |
1105 | printk(KERN_DEBUG "... APIC LVTT: %08x\n", v); | |
1106 | ||
1107 | if (maxlvt > 3) { /* PC is LVT#4. */ | |
1108 | v = apic_read(APIC_LVTPC); | |
1109 | printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v); | |
1110 | } | |
1111 | v = apic_read(APIC_LVT0); | |
1112 | printk(KERN_DEBUG "... APIC LVT0: %08x\n", v); | |
1113 | v = apic_read(APIC_LVT1); | |
1114 | printk(KERN_DEBUG "... APIC LVT1: %08x\n", v); | |
1115 | ||
1116 | if (maxlvt > 2) { /* ERR is LVT#3. */ | |
1117 | v = apic_read(APIC_LVTERR); | |
1118 | printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v); | |
1119 | } | |
1120 | ||
1121 | v = apic_read(APIC_TMICT); | |
1122 | printk(KERN_DEBUG "... APIC TMICT: %08x\n", v); | |
1123 | v = apic_read(APIC_TMCCT); | |
1124 | printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v); | |
1125 | v = apic_read(APIC_TDCR); | |
1126 | printk(KERN_DEBUG "... APIC TDCR: %08x\n", v); | |
1127 | printk("\n"); | |
1128 | } | |
1129 | ||
1130 | void print_all_local_APICs (void) | |
1131 | { | |
1132 | on_each_cpu(print_local_APIC, NULL, 1, 1); | |
1133 | } | |
1134 | ||
1135 | void __apicdebuginit print_PIC(void) | |
1136 | { | |
1da177e4 LT |
1137 | unsigned int v; |
1138 | unsigned long flags; | |
1139 | ||
1140 | if (apic_verbosity == APIC_QUIET) | |
1141 | return; | |
1142 | ||
1143 | printk(KERN_DEBUG "\nprinting PIC contents\n"); | |
1144 | ||
1145 | spin_lock_irqsave(&i8259A_lock, flags); | |
1146 | ||
1147 | v = inb(0xa1) << 8 | inb(0x21); | |
1148 | printk(KERN_DEBUG "... PIC IMR: %04x\n", v); | |
1149 | ||
1150 | v = inb(0xa0) << 8 | inb(0x20); | |
1151 | printk(KERN_DEBUG "... PIC IRR: %04x\n", v); | |
1152 | ||
1153 | outb(0x0b,0xa0); | |
1154 | outb(0x0b,0x20); | |
1155 | v = inb(0xa0) << 8 | inb(0x20); | |
1156 | outb(0x0a,0xa0); | |
1157 | outb(0x0a,0x20); | |
1158 | ||
1159 | spin_unlock_irqrestore(&i8259A_lock, flags); | |
1160 | ||
1161 | printk(KERN_DEBUG "... PIC ISR: %04x\n", v); | |
1162 | ||
1163 | v = inb(0x4d1) << 8 | inb(0x4d0); | |
1164 | printk(KERN_DEBUG "... PIC ELCR: %04x\n", v); | |
1165 | } | |
1166 | ||
1167 | #endif /* 0 */ | |
1168 | ||
1169 | static void __init enable_IO_APIC(void) | |
1170 | { | |
1171 | union IO_APIC_reg_01 reg_01; | |
1008fddc EB |
1172 | int i8259_apic, i8259_pin; |
1173 | int i, apic; | |
1da177e4 LT |
1174 | unsigned long flags; |
1175 | ||
1176 | for (i = 0; i < PIN_MAP_SIZE; i++) { | |
1177 | irq_2_pin[i].pin = -1; | |
1178 | irq_2_pin[i].next = 0; | |
1179 | } | |
1da177e4 LT |
1180 | |
1181 | /* | |
1182 | * The number of IO-APIC IRQ registers (== #pins): | |
1183 | */ | |
1008fddc | 1184 | for (apic = 0; apic < nr_ioapics; apic++) { |
1da177e4 | 1185 | spin_lock_irqsave(&ioapic_lock, flags); |
1008fddc | 1186 | reg_01.raw = io_apic_read(apic, 1); |
1da177e4 | 1187 | spin_unlock_irqrestore(&ioapic_lock, flags); |
1008fddc EB |
1188 | nr_ioapic_registers[apic] = reg_01.bits.entries+1; |
1189 | } | |
1190 | for(apic = 0; apic < nr_ioapics; apic++) { | |
1191 | int pin; | |
1192 | /* See if any of the pins is in ExtINT mode */ | |
1193 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { | |
1194 | struct IO_APIC_route_entry entry; | |
eea0e11c | 1195 | entry = ioapic_read_entry(apic, pin); |
1008fddc EB |
1196 | |
1197 | /* If the interrupt line is enabled and in ExtInt mode | |
1198 | * I have found the pin where the i8259 is connected. | |
1199 | */ | |
1200 | if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) { | |
1201 | ioapic_i8259.apic = apic; | |
1202 | ioapic_i8259.pin = pin; | |
1203 | goto found_i8259; | |
1204 | } | |
1205 | } | |
1206 | } | |
1207 | found_i8259: | |
1208 | /* Look to see what if the MP table has reported the ExtINT */ | |
1209 | i8259_pin = find_isa_irq_pin(0, mp_ExtINT); | |
1210 | i8259_apic = find_isa_irq_apic(0, mp_ExtINT); | |
1211 | /* Trust the MP table if nothing is setup in the hardware */ | |
1212 | if ((ioapic_i8259.pin == -1) && (i8259_pin >= 0)) { | |
1213 | printk(KERN_WARNING "ExtINT not setup in hardware but reported by MP table\n"); | |
1214 | ioapic_i8259.pin = i8259_pin; | |
1215 | ioapic_i8259.apic = i8259_apic; | |
1216 | } | |
1217 | /* Complain if the MP table and the hardware disagree */ | |
1218 | if (((ioapic_i8259.apic != i8259_apic) || (ioapic_i8259.pin != i8259_pin)) && | |
1219 | (i8259_pin >= 0) && (ioapic_i8259.pin >= 0)) | |
1220 | { | |
1221 | printk(KERN_WARNING "ExtINT in hardware and MP table differ\n"); | |
1da177e4 LT |
1222 | } |
1223 | ||
1224 | /* | |
1225 | * Do not trust the IO-APIC being empty at bootup | |
1226 | */ | |
1227 | clear_IO_APIC(); | |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * Not an __init, needed by the reboot code | |
1232 | */ | |
1233 | void disable_IO_APIC(void) | |
1234 | { | |
1235 | /* | |
1236 | * Clear the IO-APIC before rebooting: | |
1237 | */ | |
1238 | clear_IO_APIC(); | |
1239 | ||
208fb931 | 1240 | /* |
0b968d23 | 1241 | * If the i8259 is routed through an IOAPIC |
208fb931 | 1242 | * Put that IOAPIC in virtual wire mode |
0b968d23 | 1243 | * so legacy interrupts can be delivered. |
208fb931 | 1244 | */ |
1008fddc | 1245 | if (ioapic_i8259.pin != -1) { |
208fb931 | 1246 | struct IO_APIC_route_entry entry; |
208fb931 EB |
1247 | |
1248 | memset(&entry, 0, sizeof(entry)); | |
1249 | entry.mask = 0; /* Enabled */ | |
1250 | entry.trigger = 0; /* Edge */ | |
1251 | entry.irr = 0; | |
1252 | entry.polarity = 0; /* High */ | |
1253 | entry.delivery_status = 0; | |
1254 | entry.dest_mode = 0; /* Physical */ | |
1008fddc | 1255 | entry.delivery_mode = dest_ExtINT; /* ExtInt */ |
208fb931 | 1256 | entry.vector = 0; |
ee4eff6f | 1257 | entry.dest = GET_APIC_ID(apic_read(APIC_ID)); |
208fb931 | 1258 | |
208fb931 EB |
1259 | /* |
1260 | * Add it to the IO-APIC irq-routing table: | |
1261 | */ | |
eea0e11c | 1262 | ioapic_write_entry(ioapic_i8259.apic, ioapic_i8259.pin, entry); |
208fb931 EB |
1263 | } |
1264 | ||
1008fddc | 1265 | disconnect_bsp_APIC(ioapic_i8259.pin != -1); |
1da177e4 LT |
1266 | } |
1267 | ||
1da177e4 LT |
1268 | /* |
1269 | * There is a nasty bug in some older SMP boards, their mptable lies | |
1270 | * about the timer IRQ. We do the following to work around the situation: | |
1271 | * | |
1272 | * - timer IRQ defaults to IO-APIC IRQ | |
1273 | * - if this function detects that timer IRQs are defunct, then we fall | |
1274 | * back to ISA timer IRQs | |
1275 | */ | |
1276 | static int __init timer_irq_works(void) | |
1277 | { | |
1278 | unsigned long t1 = jiffies; | |
1279 | ||
1280 | local_irq_enable(); | |
1281 | /* Let ten ticks pass... */ | |
1282 | mdelay((10 * 1000) / HZ); | |
1283 | ||
1284 | /* | |
1285 | * Expect a few ticks at least, to be sure some possible | |
1286 | * glue logic does not lock up after one or two first | |
1287 | * ticks in a non-ExtINT mode. Also the local APIC | |
1288 | * might have cached one ExtINT interrupt. Finally, at | |
1289 | * least one tick may be lost due to delays. | |
1290 | */ | |
1291 | ||
1292 | /* jiffies wrap? */ | |
1293 | if (jiffies - t1 > 4) | |
1294 | return 1; | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | * In the SMP+IOAPIC case it might happen that there are an unspecified | |
1300 | * number of pending IRQ events unhandled. These cases are very rare, | |
1301 | * so we 'resend' these IRQs via IPIs, to the same CPU. It's much | |
1302 | * better to do it this way as thus we do not have to be aware of | |
1303 | * 'pending' interrupts in the IRQ path, except at this point. | |
1304 | */ | |
1305 | /* | |
1306 | * Edge triggered needs to resend any interrupt | |
1307 | * that was delayed but this is now handled in the device | |
1308 | * independent code. | |
1309 | */ | |
1310 | ||
1311 | /* | |
1312 | * Starting up a edge-triggered IO-APIC interrupt is | |
1313 | * nasty - we need to make sure that we get the edge. | |
1314 | * If it is already asserted for some reason, we need | |
1315 | * return 1 to indicate that is was pending. | |
1316 | * | |
1317 | * This is not complete - we should be able to fake | |
1318 | * an edge even if it isn't on the 8259A... | |
1319 | */ | |
1320 | ||
f29bd1ba | 1321 | static unsigned int startup_ioapic_irq(unsigned int irq) |
1da177e4 LT |
1322 | { |
1323 | int was_pending = 0; | |
1324 | unsigned long flags; | |
1325 | ||
1326 | spin_lock_irqsave(&ioapic_lock, flags); | |
1327 | if (irq < 16) { | |
1328 | disable_8259A_irq(irq); | |
1329 | if (i8259A_irq_pending(irq)) | |
1330 | was_pending = 1; | |
1331 | } | |
1332 | __unmask_IO_APIC_irq(irq); | |
1333 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
1334 | ||
1335 | return was_pending; | |
1336 | } | |
1337 | ||
04b9267b | 1338 | static int ioapic_retrigger_irq(unsigned int irq) |
c0ad90a3 | 1339 | { |
13a79503 | 1340 | struct irq_cfg *cfg = &irq_cfg[irq]; |
550f2299 | 1341 | cpumask_t mask; |
6bf2dafa | 1342 | unsigned long flags; |
550f2299 | 1343 | |
6bf2dafa | 1344 | spin_lock_irqsave(&vector_lock, flags); |
550f2299 | 1345 | cpus_clear(mask); |
13a79503 | 1346 | cpu_set(first_cpu(cfg->domain), mask); |
550f2299 | 1347 | |
13a79503 | 1348 | send_IPI_mask(mask, cfg->vector); |
6bf2dafa | 1349 | spin_unlock_irqrestore(&vector_lock, flags); |
c0ad90a3 IM |
1350 | |
1351 | return 1; | |
1352 | } | |
1353 | ||
1da177e4 LT |
1354 | /* |
1355 | * Level and edge triggered IO-APIC interrupts need different handling, | |
1356 | * so we use two separate IRQ descriptors. Edge triggered IRQs can be | |
1357 | * handled with the level-triggered descriptor, but that one has slightly | |
1358 | * more overhead. Level-triggered interrupts cannot be handled with the | |
1359 | * edge-triggered handler, without risking IRQ storms and other ugly | |
1360 | * races. | |
1361 | */ | |
1362 | ||
61014292 EB |
1363 | #ifdef CONFIG_SMP |
1364 | asmlinkage void smp_irq_move_cleanup_interrupt(void) | |
1365 | { | |
1366 | unsigned vector, me; | |
1367 | ack_APIC_irq(); | |
1368 | exit_idle(); | |
1369 | irq_enter(); | |
1370 | ||
1371 | me = smp_processor_id(); | |
1372 | for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { | |
1373 | unsigned int irq; | |
1374 | struct irq_desc *desc; | |
1375 | struct irq_cfg *cfg; | |
1376 | irq = __get_cpu_var(vector_irq)[vector]; | |
1377 | if (irq >= NR_IRQS) | |
1378 | continue; | |
1379 | ||
1380 | desc = irq_desc + irq; | |
1381 | cfg = irq_cfg + irq; | |
1382 | spin_lock(&desc->lock); | |
1383 | if (!cfg->move_cleanup_count) | |
1384 | goto unlock; | |
1385 | ||
1386 | if ((vector == cfg->vector) && cpu_isset(me, cfg->domain)) | |
1387 | goto unlock; | |
1388 | ||
1389 | __get_cpu_var(vector_irq)[vector] = -1; | |
1390 | cfg->move_cleanup_count--; | |
1391 | unlock: | |
1392 | spin_unlock(&desc->lock); | |
1393 | } | |
1394 | ||
1395 | irq_exit(); | |
1396 | } | |
1397 | ||
1398 | static void irq_complete_move(unsigned int irq) | |
1399 | { | |
1400 | struct irq_cfg *cfg = irq_cfg + irq; | |
1401 | unsigned vector, me; | |
1402 | ||
1403 | if (likely(!cfg->move_in_progress)) | |
1404 | return; | |
1405 | ||
1406 | vector = ~get_irq_regs()->orig_rax; | |
1407 | me = smp_processor_id(); | |
f0e13ae7 | 1408 | if ((vector == cfg->vector) && cpu_isset(me, cfg->domain)) { |
61014292 EB |
1409 | cpumask_t cleanup_mask; |
1410 | ||
1411 | cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map); | |
1412 | cfg->move_cleanup_count = cpus_weight(cleanup_mask); | |
1413 | send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); | |
1414 | cfg->move_in_progress = 0; | |
1415 | } | |
1416 | } | |
1417 | #else | |
1418 | static inline void irq_complete_move(unsigned int irq) {} | |
1419 | #endif | |
1420 | ||
0be6652f EB |
1421 | static void ack_apic_edge(unsigned int irq) |
1422 | { | |
61014292 | 1423 | irq_complete_move(irq); |
0be6652f EB |
1424 | move_native_irq(irq); |
1425 | ack_APIC_irq(); | |
1426 | } | |
1427 | ||
1428 | static void ack_apic_level(unsigned int irq) | |
1429 | { | |
1430 | int do_unmask_irq = 0; | |
1431 | ||
61014292 | 1432 | irq_complete_move(irq); |
0be6652f EB |
1433 | #if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE) |
1434 | /* If we are moving the irq we need to mask it */ | |
1435 | if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) { | |
1436 | do_unmask_irq = 1; | |
1437 | mask_IO_APIC_irq(irq); | |
1438 | } | |
1439 | #endif | |
1440 | ||
1441 | /* | |
1442 | * We must acknowledge the irq before we move it or the acknowledge will | |
beb7dd86 | 1443 | * not propagate properly. |
0be6652f EB |
1444 | */ |
1445 | ack_APIC_irq(); | |
1446 | ||
1447 | /* Now we can move and renable the irq */ | |
ef3e28c5 EB |
1448 | if (unlikely(do_unmask_irq)) { |
1449 | /* Only migrate the irq if the ack has been received. | |
1450 | * | |
1451 | * On rare occasions the broadcast level triggered ack gets | |
1452 | * delayed going to ioapics, and if we reprogram the | |
1453 | * vector while Remote IRR is still set the irq will never | |
1454 | * fire again. | |
1455 | * | |
1456 | * To prevent this scenario we read the Remote IRR bit | |
1457 | * of the ioapic. This has two effects. | |
1458 | * - On any sane system the read of the ioapic will | |
1459 | * flush writes (and acks) going to the ioapic from | |
1460 | * this cpu. | |
1461 | * - We get to see if the ACK has actually been delivered. | |
1462 | * | |
1463 | * Based on failed experiments of reprogramming the | |
1464 | * ioapic entry from outside of irq context starting | |
1465 | * with masking the ioapic entry and then polling until | |
1466 | * Remote IRR was clear before reprogramming the | |
1467 | * ioapic I don't trust the Remote IRR bit to be | |
1468 | * completey accurate. | |
1469 | * | |
1470 | * However there appears to be no other way to plug | |
1471 | * this race, so if the Remote IRR bit is not | |
1472 | * accurate and is causing problems then it is a hardware bug | |
1473 | * and you can go talk to the chipset vendor about it. | |
1474 | */ | |
1475 | if (!io_apic_level_ack_pending(irq)) | |
1476 | move_masked_irq(irq); | |
0be6652f | 1477 | unmask_IO_APIC_irq(irq); |
ef3e28c5 | 1478 | } |
0be6652f EB |
1479 | } |
1480 | ||
f29bd1ba IM |
1481 | static struct irq_chip ioapic_chip __read_mostly = { |
1482 | .name = "IO-APIC", | |
04b9267b EB |
1483 | .startup = startup_ioapic_irq, |
1484 | .mask = mask_IO_APIC_irq, | |
1485 | .unmask = unmask_IO_APIC_irq, | |
0be6652f EB |
1486 | .ack = ack_apic_edge, |
1487 | .eoi = ack_apic_level, | |
54d5d424 | 1488 | #ifdef CONFIG_SMP |
04b9267b | 1489 | .set_affinity = set_ioapic_affinity_irq, |
54d5d424 | 1490 | #endif |
04b9267b | 1491 | .retrigger = ioapic_retrigger_irq, |
1da177e4 LT |
1492 | }; |
1493 | ||
1494 | static inline void init_IO_APIC_traps(void) | |
1495 | { | |
1496 | int irq; | |
1497 | ||
1498 | /* | |
1499 | * NOTE! The local APIC isn't very good at handling | |
1500 | * multiple interrupts at the same interrupt level. | |
1501 | * As the interrupt level is determined by taking the | |
1502 | * vector number and shifting that right by 4, we | |
1503 | * want to spread these out a bit so that they don't | |
1504 | * all fall in the same interrupt level. | |
1505 | * | |
1506 | * Also, we've got to be careful not to trash gate | |
1507 | * 0x80, because int 0x80 is hm, kind of importantish. ;) | |
1508 | */ | |
1509 | for (irq = 0; irq < NR_IRQS ; irq++) { | |
1510 | int tmp = irq; | |
13a79503 | 1511 | if (IO_APIC_IRQ(tmp) && !irq_cfg[tmp].vector) { |
1da177e4 LT |
1512 | /* |
1513 | * Hmm.. We don't have an entry for this, | |
1514 | * so default to an old-fashioned 8259 | |
1515 | * interrupt if we can.. | |
1516 | */ | |
1517 | if (irq < 16) | |
1518 | make_8259A_irq(irq); | |
1519 | else | |
1520 | /* Strange. Oh, well.. */ | |
f29bd1ba | 1521 | irq_desc[irq].chip = &no_irq_chip; |
1da177e4 LT |
1522 | } |
1523 | } | |
1524 | } | |
1525 | ||
1526 | static void enable_lapic_irq (unsigned int irq) | |
1527 | { | |
1528 | unsigned long v; | |
1529 | ||
1530 | v = apic_read(APIC_LVT0); | |
11a8e778 | 1531 | apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED); |
1da177e4 LT |
1532 | } |
1533 | ||
1534 | static void disable_lapic_irq (unsigned int irq) | |
1535 | { | |
1536 | unsigned long v; | |
1537 | ||
1538 | v = apic_read(APIC_LVT0); | |
11a8e778 | 1539 | apic_write(APIC_LVT0, v | APIC_LVT_MASKED); |
1da177e4 LT |
1540 | } |
1541 | ||
1542 | static void ack_lapic_irq (unsigned int irq) | |
1543 | { | |
1544 | ack_APIC_irq(); | |
1545 | } | |
1546 | ||
1547 | static void end_lapic_irq (unsigned int i) { /* nothing */ } | |
1548 | ||
6c231b7b | 1549 | static struct hw_interrupt_type lapic_irq_type __read_mostly = { |
c47e285d | 1550 | .name = "local-APIC", |
1da177e4 LT |
1551 | .typename = "local-APIC-edge", |
1552 | .startup = NULL, /* startup_irq() not used for IRQ0 */ | |
1553 | .shutdown = NULL, /* shutdown_irq() not used for IRQ0 */ | |
1554 | .enable = enable_lapic_irq, | |
1555 | .disable = disable_lapic_irq, | |
1556 | .ack = ack_lapic_irq, | |
1557 | .end = end_lapic_irq, | |
1558 | }; | |
1559 | ||
1560 | static void setup_nmi (void) | |
1561 | { | |
1562 | /* | |
1563 | * Dirty trick to enable the NMI watchdog ... | |
1564 | * We put the 8259A master into AEOI mode and | |
1565 | * unmask on all local APICs LVT0 as NMI. | |
1566 | * | |
1567 | * The idea to use the 8259A in AEOI mode ('8259A Virtual Wire') | |
1568 | * is from Maciej W. Rozycki - so we do not have to EOI from | |
1569 | * the NMI handler or the timer interrupt. | |
1570 | */ | |
1571 | printk(KERN_INFO "activating NMI Watchdog ..."); | |
1572 | ||
1573 | enable_NMI_through_LVT0(NULL); | |
1574 | ||
1575 | printk(" done.\n"); | |
1576 | } | |
1577 | ||
1578 | /* | |
1579 | * This looks a bit hackish but it's about the only one way of sending | |
1580 | * a few INTA cycles to 8259As and any associated glue logic. ICR does | |
1581 | * not support the ExtINT mode, unfortunately. We need to send these | |
1582 | * cycles as some i82489DX-based boards have glue logic that keeps the | |
1583 | * 8259A interrupt line asserted until INTA. --macro | |
1584 | */ | |
1585 | static inline void unlock_ExtINT_logic(void) | |
1586 | { | |
1008fddc | 1587 | int apic, pin, i; |
1da177e4 LT |
1588 | struct IO_APIC_route_entry entry0, entry1; |
1589 | unsigned char save_control, save_freq_select; | |
1590 | unsigned long flags; | |
1591 | ||
1008fddc EB |
1592 | pin = find_isa_irq_pin(8, mp_INT); |
1593 | apic = find_isa_irq_apic(8, mp_INT); | |
1da177e4 LT |
1594 | if (pin == -1) |
1595 | return; | |
1596 | ||
1597 | spin_lock_irqsave(&ioapic_lock, flags); | |
1008fddc EB |
1598 | *(((int *)&entry0) + 1) = io_apic_read(apic, 0x11 + 2 * pin); |
1599 | *(((int *)&entry0) + 0) = io_apic_read(apic, 0x10 + 2 * pin); | |
1da177e4 | 1600 | spin_unlock_irqrestore(&ioapic_lock, flags); |
1008fddc | 1601 | clear_IO_APIC_pin(apic, pin); |
1da177e4 LT |
1602 | |
1603 | memset(&entry1, 0, sizeof(entry1)); | |
1604 | ||
1605 | entry1.dest_mode = 0; /* physical delivery */ | |
1606 | entry1.mask = 0; /* unmask IRQ now */ | |
ee4eff6f | 1607 | entry1.dest = hard_smp_processor_id(); |
1da177e4 LT |
1608 | entry1.delivery_mode = dest_ExtINT; |
1609 | entry1.polarity = entry0.polarity; | |
1610 | entry1.trigger = 0; | |
1611 | entry1.vector = 0; | |
1612 | ||
1613 | spin_lock_irqsave(&ioapic_lock, flags); | |
1008fddc EB |
1614 | io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry1) + 1)); |
1615 | io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry1) + 0)); | |
1da177e4 LT |
1616 | spin_unlock_irqrestore(&ioapic_lock, flags); |
1617 | ||
1618 | save_control = CMOS_READ(RTC_CONTROL); | |
1619 | save_freq_select = CMOS_READ(RTC_FREQ_SELECT); | |
1620 | CMOS_WRITE((save_freq_select & ~RTC_RATE_SELECT) | 0x6, | |
1621 | RTC_FREQ_SELECT); | |
1622 | CMOS_WRITE(save_control | RTC_PIE, RTC_CONTROL); | |
1623 | ||
1624 | i = 100; | |
1625 | while (i-- > 0) { | |
1626 | mdelay(10); | |
1627 | if ((CMOS_READ(RTC_INTR_FLAGS) & RTC_PF) == RTC_PF) | |
1628 | i -= 10; | |
1629 | } | |
1630 | ||
1631 | CMOS_WRITE(save_control, RTC_CONTROL); | |
1632 | CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT); | |
1008fddc | 1633 | clear_IO_APIC_pin(apic, pin); |
1da177e4 LT |
1634 | |
1635 | spin_lock_irqsave(&ioapic_lock, flags); | |
1008fddc EB |
1636 | io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry0) + 1)); |
1637 | io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry0) + 0)); | |
1da177e4 LT |
1638 | spin_unlock_irqrestore(&ioapic_lock, flags); |
1639 | } | |
1640 | ||
1641 | /* | |
1642 | * This code may look a bit paranoid, but it's supposed to cooperate with | |
1643 | * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ | |
1644 | * is so screwy. Thanks to Brian Perkins for testing/hacking this beast | |
1645 | * fanatically on his truly buggy board. | |
fea5f1e1 LT |
1646 | * |
1647 | * FIXME: really need to revamp this for modern platforms only. | |
1da177e4 | 1648 | */ |
fea5f1e1 | 1649 | static inline void check_timer(void) |
1da177e4 | 1650 | { |
dfbffdd8 | 1651 | struct irq_cfg *cfg = irq_cfg + 0; |
1008fddc | 1652 | int apic1, pin1, apic2, pin2; |
1da177e4 LT |
1653 | |
1654 | /* | |
1655 | * get/set the timer IRQ vector: | |
1656 | */ | |
1657 | disable_8259A_irq(0); | |
dfbffdd8 | 1658 | assign_irq_vector(0, TARGET_CPUS); |
1da177e4 LT |
1659 | |
1660 | /* | |
1661 | * Subtle, code in do_timer_interrupt() expects an AEOI | |
1662 | * mode for the 8259A whenever interrupts are routed | |
1663 | * through I/O APICs. Also IRQ0 has to be enabled in | |
1664 | * the 8259A which implies the virtual wire has to be | |
1665 | * disabled in the local APIC. | |
1666 | */ | |
11a8e778 | 1667 | apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT); |
1da177e4 | 1668 | init_8259A(1); |
fea5f1e1 LT |
1669 | if (timer_over_8254 > 0) |
1670 | enable_8259A_irq(0); | |
1da177e4 | 1671 | |
1008fddc EB |
1672 | pin1 = find_isa_irq_pin(0, mp_INT); |
1673 | apic1 = find_isa_irq_apic(0, mp_INT); | |
1674 | pin2 = ioapic_i8259.pin; | |
1675 | apic2 = ioapic_i8259.apic; | |
1da177e4 | 1676 | |
fea5f1e1 | 1677 | apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n", |
dfbffdd8 | 1678 | cfg->vector, apic1, pin1, apic2, pin2); |
b0268726 | 1679 | |
fea5f1e1 LT |
1680 | if (pin1 != -1) { |
1681 | /* | |
1682 | * Ok, does IRQ0 through the IOAPIC work? | |
1683 | */ | |
1684 | unmask_IO_APIC_irq(0); | |
1685 | if (!no_timer_check && timer_irq_works()) { | |
1686 | nmi_watchdog_default(); | |
1687 | if (nmi_watchdog == NMI_IO_APIC) { | |
1688 | disable_8259A_irq(0); | |
1689 | setup_nmi(); | |
1690 | enable_8259A_irq(0); | |
1691 | } | |
1692 | if (disable_timer_pin_1 > 0) | |
1693 | clear_IO_APIC_pin(0, pin1); | |
1694 | return; | |
1695 | } | |
1696 | clear_IO_APIC_pin(apic1, pin1); | |
1697 | apic_printk(APIC_QUIET,KERN_ERR "..MP-BIOS bug: 8254 timer not " | |
1698 | "connected to IO-APIC\n"); | |
1699 | } | |
1da177e4 | 1700 | |
fea5f1e1 LT |
1701 | apic_printk(APIC_VERBOSE,KERN_INFO "...trying to set up timer (IRQ0) " |
1702 | "through the 8259A ... "); | |
1da177e4 | 1703 | if (pin2 != -1) { |
fea5f1e1 LT |
1704 | apic_printk(APIC_VERBOSE,"\n..... (found apic %d pin %d) ...", |
1705 | apic2, pin2); | |
1706 | /* | |
1707 | * legacy devices should be connected to IO APIC #0 | |
1708 | */ | |
dfbffdd8 | 1709 | setup_ExtINT_IRQ0_pin(apic2, pin2, cfg->vector); |
fea5f1e1 LT |
1710 | if (timer_irq_works()) { |
1711 | apic_printk(APIC_VERBOSE," works.\n"); | |
1712 | nmi_watchdog_default(); | |
1713 | if (nmi_watchdog == NMI_IO_APIC) { | |
1714 | setup_nmi(); | |
1715 | } | |
1da177e4 | 1716 | return; |
fea5f1e1 LT |
1717 | } |
1718 | /* | |
1719 | * Cleanup, just in case ... | |
1720 | */ | |
1721 | clear_IO_APIC_pin(apic2, pin2); | |
1da177e4 | 1722 | } |
fea5f1e1 | 1723 | apic_printk(APIC_VERBOSE," failed.\n"); |
1da177e4 | 1724 | |
1f992153 | 1725 | if (nmi_watchdog == NMI_IO_APIC) { |
1da177e4 LT |
1726 | printk(KERN_WARNING "timer doesn't work through the IO-APIC - disabling NMI Watchdog!\n"); |
1727 | nmi_watchdog = 0; | |
1728 | } | |
1729 | ||
1730 | apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as Virtual Wire IRQ..."); | |
1731 | ||
1732 | disable_8259A_irq(0); | |
d1bef4ed | 1733 | irq_desc[0].chip = &lapic_irq_type; |
dfbffdd8 | 1734 | apic_write(APIC_LVT0, APIC_DM_FIXED | cfg->vector); /* Fixed mode */ |
1da177e4 LT |
1735 | enable_8259A_irq(0); |
1736 | ||
1737 | if (timer_irq_works()) { | |
5b922cd4 | 1738 | apic_printk(APIC_VERBOSE," works.\n"); |
1da177e4 LT |
1739 | return; |
1740 | } | |
dfbffdd8 | 1741 | apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector); |
1da177e4 LT |
1742 | apic_printk(APIC_VERBOSE," failed.\n"); |
1743 | ||
1744 | apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as ExtINT IRQ..."); | |
1745 | ||
1746 | init_8259A(0); | |
1747 | make_8259A_irq(0); | |
11a8e778 | 1748 | apic_write(APIC_LVT0, APIC_DM_EXTINT); |
1da177e4 LT |
1749 | |
1750 | unlock_ExtINT_logic(); | |
1751 | ||
1752 | if (timer_irq_works()) { | |
1753 | apic_printk(APIC_VERBOSE," works.\n"); | |
1754 | return; | |
1755 | } | |
1756 | apic_printk(APIC_VERBOSE," failed :(.\n"); | |
1757 | panic("IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter\n"); | |
1758 | } | |
1759 | ||
14d98cad AK |
1760 | static int __init notimercheck(char *s) |
1761 | { | |
1762 | no_timer_check = 1; | |
1763 | return 1; | |
1764 | } | |
1765 | __setup("no_timer_check", notimercheck); | |
1766 | ||
1da177e4 LT |
1767 | /* |
1768 | * | |
1769 | * IRQ's that are handled by the PIC in the MPS IOAPIC case. | |
1770 | * - IRQ2 is the cascade IRQ, and cannot be a io-apic IRQ. | |
1771 | * Linux doesn't really care, as it's not actually used | |
1772 | * for any interrupt handling anyway. | |
1773 | */ | |
1774 | #define PIC_IRQS (1<<2) | |
1775 | ||
1776 | void __init setup_IO_APIC(void) | |
1777 | { | |
1778 | enable_IO_APIC(); | |
1779 | ||
1780 | if (acpi_ioapic) | |
1781 | io_apic_irqs = ~0; /* all IRQs go through IOAPIC */ | |
1782 | else | |
1783 | io_apic_irqs = ~PIC_IRQS; | |
1784 | ||
1785 | apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n"); | |
1786 | ||
1da177e4 LT |
1787 | sync_Arb_IDs(); |
1788 | setup_IO_APIC_irqs(); | |
1789 | init_IO_APIC_traps(); | |
1790 | check_timer(); | |
1791 | if (!acpi_ioapic) | |
1792 | print_IO_APIC(); | |
1793 | } | |
1794 | ||
1795 | struct sysfs_ioapic_data { | |
1796 | struct sys_device dev; | |
1797 | struct IO_APIC_route_entry entry[0]; | |
1798 | }; | |
1799 | static struct sysfs_ioapic_data * mp_ioapic_data[MAX_IO_APICS]; | |
1800 | ||
0b9c33a7 | 1801 | static int ioapic_suspend(struct sys_device *dev, pm_message_t state) |
1da177e4 LT |
1802 | { |
1803 | struct IO_APIC_route_entry *entry; | |
1804 | struct sysfs_ioapic_data *data; | |
1da177e4 LT |
1805 | int i; |
1806 | ||
1807 | data = container_of(dev, struct sysfs_ioapic_data, dev); | |
1808 | entry = data->entry; | |
eea0e11c AK |
1809 | for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) |
1810 | *entry = ioapic_read_entry(dev->id, i); | |
1da177e4 LT |
1811 | |
1812 | return 0; | |
1813 | } | |
1814 | ||
1815 | static int ioapic_resume(struct sys_device *dev) | |
1816 | { | |
1817 | struct IO_APIC_route_entry *entry; | |
1818 | struct sysfs_ioapic_data *data; | |
1819 | unsigned long flags; | |
1820 | union IO_APIC_reg_00 reg_00; | |
1821 | int i; | |
1822 | ||
1823 | data = container_of(dev, struct sysfs_ioapic_data, dev); | |
1824 | entry = data->entry; | |
1825 | ||
1826 | spin_lock_irqsave(&ioapic_lock, flags); | |
1827 | reg_00.raw = io_apic_read(dev->id, 0); | |
1828 | if (reg_00.bits.ID != mp_ioapics[dev->id].mpc_apicid) { | |
1829 | reg_00.bits.ID = mp_ioapics[dev->id].mpc_apicid; | |
1830 | io_apic_write(dev->id, 0, reg_00.raw); | |
1831 | } | |
1da177e4 | 1832 | spin_unlock_irqrestore(&ioapic_lock, flags); |
eea0e11c AK |
1833 | for (i = 0; i < nr_ioapic_registers[dev->id]; i++) |
1834 | ioapic_write_entry(dev->id, i, entry[i]); | |
1da177e4 LT |
1835 | |
1836 | return 0; | |
1837 | } | |
1838 | ||
1839 | static struct sysdev_class ioapic_sysdev_class = { | |
1840 | set_kset_name("ioapic"), | |
1841 | .suspend = ioapic_suspend, | |
1842 | .resume = ioapic_resume, | |
1843 | }; | |
1844 | ||
1845 | static int __init ioapic_init_sysfs(void) | |
1846 | { | |
1847 | struct sys_device * dev; | |
1848 | int i, size, error = 0; | |
1849 | ||
1850 | error = sysdev_class_register(&ioapic_sysdev_class); | |
1851 | if (error) | |
1852 | return error; | |
1853 | ||
1854 | for (i = 0; i < nr_ioapics; i++ ) { | |
1855 | size = sizeof(struct sys_device) + nr_ioapic_registers[i] | |
1856 | * sizeof(struct IO_APIC_route_entry); | |
1857 | mp_ioapic_data[i] = kmalloc(size, GFP_KERNEL); | |
1858 | if (!mp_ioapic_data[i]) { | |
1859 | printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i); | |
1860 | continue; | |
1861 | } | |
1862 | memset(mp_ioapic_data[i], 0, size); | |
1863 | dev = &mp_ioapic_data[i]->dev; | |
1864 | dev->id = i; | |
1865 | dev->cls = &ioapic_sysdev_class; | |
1866 | error = sysdev_register(dev); | |
1867 | if (error) { | |
1868 | kfree(mp_ioapic_data[i]); | |
1869 | mp_ioapic_data[i] = NULL; | |
1870 | printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i); | |
1871 | continue; | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | return 0; | |
1876 | } | |
1877 | ||
1878 | device_initcall(ioapic_init_sysfs); | |
1879 | ||
c4fa0bbf | 1880 | /* |
04b9267b | 1881 | * Dynamic irq allocate and deallocation |
c4fa0bbf EB |
1882 | */ |
1883 | int create_irq(void) | |
1884 | { | |
04b9267b EB |
1885 | /* Allocate an unused irq */ |
1886 | int irq; | |
1887 | int new; | |
c4fa0bbf | 1888 | unsigned long flags; |
c4fa0bbf | 1889 | |
04b9267b EB |
1890 | irq = -ENOSPC; |
1891 | spin_lock_irqsave(&vector_lock, flags); | |
1892 | for (new = (NR_IRQS - 1); new >= 0; new--) { | |
1893 | if (platform_legacy_irq(new)) | |
1894 | continue; | |
13a79503 | 1895 | if (irq_cfg[new].vector != 0) |
04b9267b | 1896 | continue; |
dfbffdd8 | 1897 | if (__assign_irq_vector(new, TARGET_CPUS) == 0) |
04b9267b EB |
1898 | irq = new; |
1899 | break; | |
1900 | } | |
1901 | spin_unlock_irqrestore(&vector_lock, flags); | |
c4fa0bbf | 1902 | |
04b9267b | 1903 | if (irq >= 0) { |
c4fa0bbf EB |
1904 | dynamic_irq_init(irq); |
1905 | } | |
1906 | return irq; | |
1907 | } | |
1908 | ||
1909 | void destroy_irq(unsigned int irq) | |
1910 | { | |
1911 | unsigned long flags; | |
c4fa0bbf EB |
1912 | |
1913 | dynamic_irq_cleanup(irq); | |
1914 | ||
1915 | spin_lock_irqsave(&vector_lock, flags); | |
5df0287e | 1916 | __clear_irq_vector(irq); |
c4fa0bbf EB |
1917 | spin_unlock_irqrestore(&vector_lock, flags); |
1918 | } | |
c4fa0bbf | 1919 | |
589e367f EB |
1920 | /* |
1921 | * MSI mesage composition | |
1922 | */ | |
1923 | #ifdef CONFIG_PCI_MSI | |
3b7d1921 | 1924 | static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg) |
589e367f | 1925 | { |
dfbffdd8 EB |
1926 | struct irq_cfg *cfg = irq_cfg + irq; |
1927 | int err; | |
589e367f | 1928 | unsigned dest; |
c7111c13 | 1929 | cpumask_t tmp; |
589e367f | 1930 | |
dfbffdd8 EB |
1931 | tmp = TARGET_CPUS; |
1932 | err = assign_irq_vector(irq, tmp); | |
1933 | if (!err) { | |
1934 | cpus_and(tmp, cfg->domain, tmp); | |
589e367f EB |
1935 | dest = cpu_mask_to_apicid(tmp); |
1936 | ||
1937 | msg->address_hi = MSI_ADDR_BASE_HI; | |
1938 | msg->address_lo = | |
1939 | MSI_ADDR_BASE_LO | | |
1940 | ((INT_DEST_MODE == 0) ? | |
1941 | MSI_ADDR_DEST_MODE_PHYSICAL: | |
1942 | MSI_ADDR_DEST_MODE_LOGICAL) | | |
1943 | ((INT_DELIVERY_MODE != dest_LowestPrio) ? | |
1944 | MSI_ADDR_REDIRECTION_CPU: | |
1945 | MSI_ADDR_REDIRECTION_LOWPRI) | | |
1946 | MSI_ADDR_DEST_ID(dest); | |
1947 | ||
1948 | msg->data = | |
1949 | MSI_DATA_TRIGGER_EDGE | | |
1950 | MSI_DATA_LEVEL_ASSERT | | |
1951 | ((INT_DELIVERY_MODE != dest_LowestPrio) ? | |
1952 | MSI_DATA_DELIVERY_FIXED: | |
1953 | MSI_DATA_DELIVERY_LOWPRI) | | |
dfbffdd8 | 1954 | MSI_DATA_VECTOR(cfg->vector); |
589e367f | 1955 | } |
dfbffdd8 | 1956 | return err; |
589e367f EB |
1957 | } |
1958 | ||
3b7d1921 EB |
1959 | #ifdef CONFIG_SMP |
1960 | static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask) | |
589e367f | 1961 | { |
dfbffdd8 | 1962 | struct irq_cfg *cfg = irq_cfg + irq; |
3b7d1921 EB |
1963 | struct msi_msg msg; |
1964 | unsigned int dest; | |
1965 | cpumask_t tmp; | |
3b7d1921 EB |
1966 | |
1967 | cpus_and(tmp, mask, cpu_online_map); | |
1968 | if (cpus_empty(tmp)) | |
5ff5115e | 1969 | return; |
589e367f | 1970 | |
dfbffdd8 | 1971 | if (assign_irq_vector(irq, mask)) |
3b7d1921 | 1972 | return; |
550f2299 | 1973 | |
dfbffdd8 | 1974 | cpus_and(tmp, cfg->domain, mask); |
3b7d1921 | 1975 | dest = cpu_mask_to_apicid(tmp); |
589e367f | 1976 | |
3b7d1921 EB |
1977 | read_msi_msg(irq, &msg); |
1978 | ||
1979 | msg.data &= ~MSI_DATA_VECTOR_MASK; | |
dfbffdd8 | 1980 | msg.data |= MSI_DATA_VECTOR(cfg->vector); |
3b7d1921 EB |
1981 | msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; |
1982 | msg.address_lo |= MSI_ADDR_DEST_ID(dest); | |
1983 | ||
1984 | write_msi_msg(irq, &msg); | |
9f0a5ba5 | 1985 | irq_desc[irq].affinity = mask; |
589e367f | 1986 | } |
3b7d1921 | 1987 | #endif /* CONFIG_SMP */ |
589e367f | 1988 | |
3b7d1921 EB |
1989 | /* |
1990 | * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices, | |
1991 | * which implement the MSI or MSI-X Capability Structure. | |
1992 | */ | |
1993 | static struct irq_chip msi_chip = { | |
1994 | .name = "PCI-MSI", | |
1995 | .unmask = unmask_msi_irq, | |
1996 | .mask = mask_msi_irq, | |
1997 | .ack = ack_apic_edge, | |
1998 | #ifdef CONFIG_SMP | |
1999 | .set_affinity = set_msi_irq_affinity, | |
2000 | #endif | |
2001 | .retrigger = ioapic_retrigger_irq, | |
589e367f EB |
2002 | }; |
2003 | ||
f7feaca7 | 2004 | int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) |
3b7d1921 EB |
2005 | { |
2006 | struct msi_msg msg; | |
f7feaca7 EB |
2007 | int irq, ret; |
2008 | irq = create_irq(); | |
2009 | if (irq < 0) | |
2010 | return irq; | |
2011 | ||
3b7d1921 | 2012 | ret = msi_compose_msg(dev, irq, &msg); |
f7feaca7 EB |
2013 | if (ret < 0) { |
2014 | destroy_irq(irq); | |
3b7d1921 | 2015 | return ret; |
f7feaca7 | 2016 | } |
3b7d1921 | 2017 | |
7fe3730d | 2018 | set_irq_msi(irq, desc); |
3b7d1921 EB |
2019 | write_msi_msg(irq, &msg); |
2020 | ||
a460e745 | 2021 | set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq, "edge"); |
3b7d1921 | 2022 | |
7fe3730d | 2023 | return 0; |
3b7d1921 EB |
2024 | } |
2025 | ||
2026 | void arch_teardown_msi_irq(unsigned int irq) | |
2027 | { | |
f7feaca7 | 2028 | destroy_irq(irq); |
3b7d1921 EB |
2029 | } |
2030 | ||
2031 | #endif /* CONFIG_PCI_MSI */ | |
589e367f | 2032 | |
8b955b0d EB |
2033 | /* |
2034 | * Hypertransport interrupt support | |
2035 | */ | |
2036 | #ifdef CONFIG_HT_IRQ | |
2037 | ||
2038 | #ifdef CONFIG_SMP | |
2039 | ||
2040 | static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector) | |
2041 | { | |
ec68307c EB |
2042 | struct ht_irq_msg msg; |
2043 | fetch_ht_irq_msg(irq, &msg); | |
8b955b0d | 2044 | |
ec68307c EB |
2045 | msg.address_lo &= ~(HT_IRQ_LOW_VECTOR_MASK | HT_IRQ_LOW_DEST_ID_MASK); |
2046 | msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK); | |
8b955b0d | 2047 | |
ec68307c EB |
2048 | msg.address_lo |= HT_IRQ_LOW_VECTOR(vector) | HT_IRQ_LOW_DEST_ID(dest); |
2049 | msg.address_hi |= HT_IRQ_HIGH_DEST_ID(dest); | |
8b955b0d | 2050 | |
ec68307c | 2051 | write_ht_irq_msg(irq, &msg); |
8b955b0d EB |
2052 | } |
2053 | ||
2054 | static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask) | |
2055 | { | |
dfbffdd8 | 2056 | struct irq_cfg *cfg = irq_cfg + irq; |
8b955b0d EB |
2057 | unsigned int dest; |
2058 | cpumask_t tmp; | |
8b955b0d EB |
2059 | |
2060 | cpus_and(tmp, mask, cpu_online_map); | |
2061 | if (cpus_empty(tmp)) | |
5ff5115e | 2062 | return; |
8b955b0d | 2063 | |
dfbffdd8 | 2064 | if (assign_irq_vector(irq, mask)) |
8b955b0d EB |
2065 | return; |
2066 | ||
dfbffdd8 | 2067 | cpus_and(tmp, cfg->domain, mask); |
8b955b0d EB |
2068 | dest = cpu_mask_to_apicid(tmp); |
2069 | ||
dfbffdd8 | 2070 | target_ht_irq(irq, dest, cfg->vector); |
9f0a5ba5 | 2071 | irq_desc[irq].affinity = mask; |
8b955b0d EB |
2072 | } |
2073 | #endif | |
2074 | ||
c37e108d | 2075 | static struct irq_chip ht_irq_chip = { |
8b955b0d EB |
2076 | .name = "PCI-HT", |
2077 | .mask = mask_ht_irq, | |
2078 | .unmask = unmask_ht_irq, | |
2079 | .ack = ack_apic_edge, | |
2080 | #ifdef CONFIG_SMP | |
2081 | .set_affinity = set_ht_irq_affinity, | |
2082 | #endif | |
2083 | .retrigger = ioapic_retrigger_irq, | |
2084 | }; | |
2085 | ||
2086 | int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) | |
2087 | { | |
dfbffdd8 EB |
2088 | struct irq_cfg *cfg = irq_cfg + irq; |
2089 | int err; | |
c7111c13 | 2090 | cpumask_t tmp; |
8b955b0d | 2091 | |
dfbffdd8 EB |
2092 | tmp = TARGET_CPUS; |
2093 | err = assign_irq_vector(irq, tmp); | |
2094 | if (!err) { | |
ec68307c | 2095 | struct ht_irq_msg msg; |
8b955b0d | 2096 | unsigned dest; |
8b955b0d | 2097 | |
dfbffdd8 | 2098 | cpus_and(tmp, cfg->domain, tmp); |
8b955b0d EB |
2099 | dest = cpu_mask_to_apicid(tmp); |
2100 | ||
ec68307c | 2101 | msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest); |
8b955b0d | 2102 | |
ec68307c EB |
2103 | msg.address_lo = |
2104 | HT_IRQ_LOW_BASE | | |
8b955b0d | 2105 | HT_IRQ_LOW_DEST_ID(dest) | |
dfbffdd8 | 2106 | HT_IRQ_LOW_VECTOR(cfg->vector) | |
8b955b0d EB |
2107 | ((INT_DEST_MODE == 0) ? |
2108 | HT_IRQ_LOW_DM_PHYSICAL : | |
2109 | HT_IRQ_LOW_DM_LOGICAL) | | |
2110 | HT_IRQ_LOW_RQEOI_EDGE | | |
2111 | ((INT_DELIVERY_MODE != dest_LowestPrio) ? | |
2112 | HT_IRQ_LOW_MT_FIXED : | |
ec68307c EB |
2113 | HT_IRQ_LOW_MT_ARBITRATED) | |
2114 | HT_IRQ_LOW_IRQ_MASKED; | |
8b955b0d | 2115 | |
ec68307c | 2116 | write_ht_irq_msg(irq, &msg); |
8b955b0d | 2117 | |
a460e745 IM |
2118 | set_irq_chip_and_handler_name(irq, &ht_irq_chip, |
2119 | handle_edge_irq, "edge"); | |
8b955b0d | 2120 | } |
dfbffdd8 | 2121 | return err; |
8b955b0d EB |
2122 | } |
2123 | #endif /* CONFIG_HT_IRQ */ | |
2124 | ||
1da177e4 LT |
2125 | /* -------------------------------------------------------------------------- |
2126 | ACPI-based IOAPIC Configuration | |
2127 | -------------------------------------------------------------------------- */ | |
2128 | ||
888ba6c6 | 2129 | #ifdef CONFIG_ACPI |
1da177e4 LT |
2130 | |
2131 | #define IO_APIC_MAX_ID 0xFE | |
2132 | ||
1da177e4 LT |
2133 | int __init io_apic_get_redir_entries (int ioapic) |
2134 | { | |
2135 | union IO_APIC_reg_01 reg_01; | |
2136 | unsigned long flags; | |
2137 | ||
2138 | spin_lock_irqsave(&ioapic_lock, flags); | |
2139 | reg_01.raw = io_apic_read(ioapic, 1); | |
2140 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
2141 | ||
2142 | return reg_01.bits.entries; | |
2143 | } | |
2144 | ||
2145 | ||
50eca3eb | 2146 | int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int polarity) |
1da177e4 | 2147 | { |
1da177e4 LT |
2148 | if (!IO_APIC_IRQ(irq)) { |
2149 | apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n", | |
2150 | ioapic); | |
2151 | return -EINVAL; | |
2152 | } | |
2153 | ||
550f2299 EB |
2154 | /* |
2155 | * IRQs < 16 are already in the irq_2_pin[] map | |
2156 | */ | |
2157 | if (irq >= 16) | |
2158 | add_pin_to_irq(irq, ioapic, pin); | |
2159 | ||
a8c8a367 | 2160 | setup_IO_APIC_irq(ioapic, pin, irq, triggering, polarity); |
1da177e4 LT |
2161 | |
2162 | return 0; | |
2163 | } | |
2164 | ||
888ba6c6 | 2165 | #endif /* CONFIG_ACPI */ |
1da177e4 LT |
2166 | |
2167 | ||
2168 | /* | |
2169 | * This function currently is only a helper for the i386 smp boot process where | |
2170 | * we need to reprogram the ioredtbls to cater for the cpus which have come online | |
2171 | * so mask in all cases should simply be TARGET_CPUS | |
2172 | */ | |
54d5d424 | 2173 | #ifdef CONFIG_SMP |
1da177e4 LT |
2174 | void __init setup_ioapic_dest(void) |
2175 | { | |
2176 | int pin, ioapic, irq, irq_entry; | |
2177 | ||
2178 | if (skip_ioapic_setup == 1) | |
2179 | return; | |
2180 | ||
2181 | for (ioapic = 0; ioapic < nr_ioapics; ioapic++) { | |
2182 | for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) { | |
2183 | irq_entry = find_irq_entry(ioapic, pin, mp_INT); | |
2184 | if (irq_entry == -1) | |
2185 | continue; | |
2186 | irq = pin_2_irq(irq_entry, ioapic, pin); | |
ad892f5e YL |
2187 | |
2188 | /* setup_IO_APIC_irqs could fail to get vector for some device | |
2189 | * when you have too many devices, because at that time only boot | |
2190 | * cpu is online. | |
2191 | */ | |
13a79503 | 2192 | if (!irq_cfg[irq].vector) |
a8c8a367 EB |
2193 | setup_IO_APIC_irq(ioapic, pin, irq, |
2194 | irq_trigger(irq_entry), | |
2195 | irq_polarity(irq_entry)); | |
ad892f5e YL |
2196 | else |
2197 | set_ioapic_affinity_irq(irq, TARGET_CPUS); | |
1da177e4 LT |
2198 | } |
2199 | ||
2200 | } | |
2201 | } | |
54d5d424 | 2202 | #endif |