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> | |
d4057bdb | 28 | #include <linux/pci.h> |
1da177e4 LT |
29 | #include <linux/mc146818rtc.h> |
30 | #include <linux/compiler.h> | |
31 | #include <linux/acpi.h> | |
129f6946 | 32 | #include <linux/module.h> |
1da177e4 | 33 | #include <linux/sysdev.h> |
3b7d1921 | 34 | #include <linux/msi.h> |
95d77884 | 35 | #include <linux/htirq.h> |
7dfb7103 | 36 | #include <linux/freezer.h> |
f26d6a2b | 37 | #include <linux/kthread.h> |
54168ed7 | 38 | #include <linux/jiffies.h> /* time_after() */ |
d4057bdb YL |
39 | #ifdef CONFIG_ACPI |
40 | #include <acpi/acpi_bus.h> | |
41 | #endif | |
42 | #include <linux/bootmem.h> | |
43 | #include <linux/dmar.h> | |
54d5d424 | 44 | |
d4057bdb | 45 | #include <asm/idle.h> |
1da177e4 LT |
46 | #include <asm/io.h> |
47 | #include <asm/smp.h> | |
48 | #include <asm/desc.h> | |
d4057bdb YL |
49 | #include <asm/proto.h> |
50 | #include <asm/acpi.h> | |
51 | #include <asm/dma.h> | |
1da177e4 | 52 | #include <asm/timer.h> |
306e440d | 53 | #include <asm/i8259.h> |
3e4ff115 | 54 | #include <asm/nmi.h> |
2d3fcc1c | 55 | #include <asm/msidef.h> |
8b955b0d | 56 | #include <asm/hypertransport.h> |
a4dbc34d | 57 | #include <asm/setup.h> |
d4057bdb | 58 | #include <asm/irq_remapping.h> |
1da177e4 | 59 | |
497c9a19 | 60 | #include <mach_ipi.h> |
1da177e4 | 61 | #include <mach_apic.h> |
874c4fe3 | 62 | #include <mach_apicdef.h> |
1da177e4 | 63 | |
32f71aff MR |
64 | #define __apicdebuginit(type) static type __init |
65 | ||
1da177e4 | 66 | /* |
54168ed7 IM |
67 | * Is the SiS APIC rmw bug present ? |
68 | * -1 = don't know, 0 = no, 1 = yes | |
1da177e4 LT |
69 | */ |
70 | int sis_apic_bug = -1; | |
71 | ||
efa2559f YL |
72 | static DEFINE_SPINLOCK(ioapic_lock); |
73 | static DEFINE_SPINLOCK(vector_lock); | |
74 | ||
301e6190 | 75 | int first_free_entry; |
efa2559f YL |
76 | /* |
77 | * Rough estimation of how many shared IRQs there are, can | |
78 | * be changed anytime. | |
79 | */ | |
80 | int pin_map_size; | |
81 | ||
1da177e4 LT |
82 | /* |
83 | * # of IRQ routing registers | |
84 | */ | |
85 | int nr_ioapic_registers[MAX_IO_APICS]; | |
86 | ||
9f640ccb | 87 | /* I/O APIC entries */ |
ec2cd0a2 | 88 | struct mp_config_ioapic mp_ioapics[MAX_IO_APICS]; |
9f640ccb AS |
89 | int nr_ioapics; |
90 | ||
584f734d | 91 | /* MP IRQ source entries */ |
2fddb6e2 | 92 | struct mp_config_intsrc mp_irqs[MAX_IRQ_SOURCES]; |
584f734d AS |
93 | |
94 | /* # of MP IRQ source entries */ | |
95 | int mp_irq_entries; | |
96 | ||
8732fc4b AS |
97 | #if defined (CONFIG_MCA) || defined (CONFIG_EISA) |
98 | int mp_bus_id_to_type[MAX_MP_BUSSES]; | |
99 | #endif | |
100 | ||
101 | DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES); | |
102 | ||
efa2559f YL |
103 | int skip_ioapic_setup; |
104 | ||
54168ed7 | 105 | static int __init parse_noapic(char *str) |
efa2559f YL |
106 | { |
107 | /* disable IO-APIC */ | |
108 | disable_ioapic_setup(); | |
109 | return 0; | |
110 | } | |
111 | early_param("noapic", parse_noapic); | |
66759a01 | 112 | |
da51a821 | 113 | struct irq_cfg; |
0f978f45 | 114 | struct irq_pin_list; |
a1420f39 | 115 | struct irq_cfg { |
da51a821 YL |
116 | unsigned int irq; |
117 | struct irq_cfg *next; | |
0f978f45 | 118 | struct irq_pin_list *irq_2_pin; |
497c9a19 YL |
119 | cpumask_t domain; |
120 | cpumask_t old_domain; | |
121 | unsigned move_cleanup_count; | |
a1420f39 | 122 | u8 vector; |
497c9a19 | 123 | u8 move_in_progress : 1; |
a1420f39 YL |
124 | }; |
125 | ||
a1420f39 YL |
126 | /* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */ |
127 | static struct irq_cfg irq_cfg_legacy[] __initdata = { | |
497c9a19 YL |
128 | [0] = { .irq = 0, .domain = CPU_MASK_ALL, .vector = IRQ0_VECTOR, }, |
129 | [1] = { .irq = 1, .domain = CPU_MASK_ALL, .vector = IRQ1_VECTOR, }, | |
130 | [2] = { .irq = 2, .domain = CPU_MASK_ALL, .vector = IRQ2_VECTOR, }, | |
131 | [3] = { .irq = 3, .domain = CPU_MASK_ALL, .vector = IRQ3_VECTOR, }, | |
132 | [4] = { .irq = 4, .domain = CPU_MASK_ALL, .vector = IRQ4_VECTOR, }, | |
133 | [5] = { .irq = 5, .domain = CPU_MASK_ALL, .vector = IRQ5_VECTOR, }, | |
134 | [6] = { .irq = 6, .domain = CPU_MASK_ALL, .vector = IRQ6_VECTOR, }, | |
135 | [7] = { .irq = 7, .domain = CPU_MASK_ALL, .vector = IRQ7_VECTOR, }, | |
136 | [8] = { .irq = 8, .domain = CPU_MASK_ALL, .vector = IRQ8_VECTOR, }, | |
137 | [9] = { .irq = 9, .domain = CPU_MASK_ALL, .vector = IRQ9_VECTOR, }, | |
138 | [10] = { .irq = 10, .domain = CPU_MASK_ALL, .vector = IRQ10_VECTOR, }, | |
139 | [11] = { .irq = 11, .domain = CPU_MASK_ALL, .vector = IRQ11_VECTOR, }, | |
140 | [12] = { .irq = 12, .domain = CPU_MASK_ALL, .vector = IRQ12_VECTOR, }, | |
141 | [13] = { .irq = 13, .domain = CPU_MASK_ALL, .vector = IRQ13_VECTOR, }, | |
142 | [14] = { .irq = 14, .domain = CPU_MASK_ALL, .vector = IRQ14_VECTOR, }, | |
143 | [15] = { .irq = 15, .domain = CPU_MASK_ALL, .vector = IRQ15_VECTOR, }, | |
a1420f39 YL |
144 | }; |
145 | ||
da51a821 YL |
146 | static struct irq_cfg irq_cfg_init = { .irq = -1U, }; |
147 | /* need to be biger than size of irq_cfg_legacy */ | |
148 | static int nr_irq_cfg = 32; | |
149 | ||
150 | static int __init parse_nr_irq_cfg(char *arg) | |
151 | { | |
152 | if (arg) { | |
153 | nr_irq_cfg = simple_strtoul(arg, NULL, 0); | |
154 | if (nr_irq_cfg < 32) | |
155 | nr_irq_cfg = 32; | |
156 | } | |
157 | return 0; | |
158 | } | |
159 | ||
160 | early_param("nr_irq_cfg", parse_nr_irq_cfg); | |
161 | ||
162 | static void init_one_irq_cfg(struct irq_cfg *cfg) | |
163 | { | |
164 | memcpy(cfg, &irq_cfg_init, sizeof(struct irq_cfg)); | |
165 | } | |
166 | ||
167 | static struct irq_cfg *irq_cfgx; | |
168 | static struct irq_cfg *irq_cfgx_free; | |
a1420f39 YL |
169 | static void __init init_work(void *data) |
170 | { | |
da51a821 YL |
171 | struct dyn_array *da = data; |
172 | struct irq_cfg *cfg; | |
173 | int legacy_count; | |
174 | int i; | |
175 | ||
176 | cfg = *da->name; | |
a1420f39 | 177 | |
da51a821 | 178 | memcpy(cfg, irq_cfg_legacy, sizeof(irq_cfg_legacy)); |
a1420f39 | 179 | |
da51a821 YL |
180 | legacy_count = sizeof(irq_cfg_legacy)/sizeof(irq_cfg_legacy[0]); |
181 | for (i = legacy_count; i < *da->nr; i++) | |
182 | init_one_irq_cfg(&cfg[i]); | |
a1420f39 | 183 | |
da51a821 YL |
184 | for (i = 1; i < *da->nr; i++) |
185 | cfg[i-1].next = &cfg[i]; | |
a1420f39 | 186 | |
da51a821 YL |
187 | irq_cfgx_free = &irq_cfgx[legacy_count]; |
188 | irq_cfgx[legacy_count - 1].next = NULL; | |
a1420f39 YL |
189 | } |
190 | ||
54168ed7 | 191 | #define for_each_irq_cfg(cfg) \ |
da51a821 YL |
192 | for (cfg = irq_cfgx; cfg; cfg = cfg->next) |
193 | ||
194 | DEFINE_DYN_ARRAY(irq_cfgx, sizeof(struct irq_cfg), nr_irq_cfg, PAGE_SIZE, init_work); | |
a1420f39 YL |
195 | |
196 | static struct irq_cfg *irq_cfg(unsigned int irq) | |
197 | { | |
da51a821 YL |
198 | struct irq_cfg *cfg; |
199 | ||
200 | cfg = irq_cfgx; | |
201 | while (cfg) { | |
202 | if (cfg->irq == irq) | |
203 | return cfg; | |
204 | ||
205 | cfg = cfg->next; | |
206 | } | |
207 | ||
208 | return NULL; | |
209 | } | |
210 | ||
211 | static struct irq_cfg *irq_cfg_alloc(unsigned int irq) | |
212 | { | |
213 | struct irq_cfg *cfg, *cfg_pri; | |
214 | int i; | |
215 | int count = 0; | |
216 | ||
217 | cfg_pri = cfg = irq_cfgx; | |
218 | while (cfg) { | |
219 | if (cfg->irq == irq) | |
220 | return cfg; | |
221 | ||
222 | cfg_pri = cfg; | |
223 | cfg = cfg->next; | |
224 | count++; | |
225 | } | |
226 | ||
227 | if (!irq_cfgx_free) { | |
228 | unsigned long phys; | |
229 | unsigned long total_bytes; | |
230 | /* | |
231 | * we run out of pre-allocate ones, allocate more | |
232 | */ | |
233 | printk(KERN_DEBUG "try to get more irq_cfg %d\n", nr_irq_cfg); | |
234 | ||
235 | total_bytes = sizeof(struct irq_cfg) * nr_irq_cfg; | |
236 | if (after_bootmem) | |
237 | cfg = kzalloc(total_bytes, GFP_ATOMIC); | |
238 | else | |
239 | cfg = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0); | |
a1420f39 | 240 | |
da51a821 YL |
241 | if (!cfg) |
242 | panic("please boot with nr_irq_cfg= %d\n", count * 2); | |
243 | ||
244 | phys = __pa(cfg); | |
245 | printk(KERN_DEBUG "irq_irq ==> [%#lx - %#lx]\n", phys, phys + total_bytes); | |
246 | ||
247 | for (i = 0; i < nr_irq_cfg; i++) | |
248 | init_one_irq_cfg(&cfg[i]); | |
249 | ||
250 | for (i = 1; i < nr_irq_cfg; i++) | |
251 | cfg[i-1].next = &cfg[i]; | |
252 | ||
253 | irq_cfgx_free = cfg; | |
254 | } | |
255 | ||
256 | cfg = irq_cfgx_free; | |
257 | irq_cfgx_free = irq_cfgx_free->next; | |
258 | cfg->next = NULL; | |
259 | if (cfg_pri) | |
260 | cfg_pri->next = cfg; | |
261 | else | |
262 | irq_cfgx = cfg; | |
263 | cfg->irq = irq; | |
264 | printk(KERN_DEBUG "found new irq_cfg for irq %d\n", cfg->irq); | |
da51a821 YL |
265 | #ifdef CONFIG_HAVE_SPARSE_IRQ_DEBUG |
266 | { | |
267 | /* dump the results */ | |
268 | struct irq_cfg *cfg; | |
269 | unsigned long phys; | |
270 | unsigned long bytes = sizeof(struct irq_cfg); | |
271 | ||
272 | printk(KERN_DEBUG "=========================== %d\n", irq); | |
273 | printk(KERN_DEBUG "irq_cfg dump after get that for %d\n", irq); | |
274 | for_each_irq_cfg(cfg) { | |
275 | phys = __pa(cfg); | |
276 | printk(KERN_DEBUG "irq_cfg %d ==> [%#lx - %#lx]\n", cfg->irq, phys, phys + bytes); | |
277 | } | |
278 | printk(KERN_DEBUG "===========================\n"); | |
279 | } | |
280 | #endif | |
281 | return cfg; | |
a1420f39 YL |
282 | } |
283 | ||
1da177e4 LT |
284 | /* |
285 | * This is performance-critical, we want to do it O(1) | |
286 | * | |
287 | * the indexing order of this array favors 1:1 mappings | |
288 | * between pins and IRQs. | |
289 | */ | |
290 | ||
0f978f45 YL |
291 | struct irq_pin_list { |
292 | int apic, pin; | |
293 | struct irq_pin_list *next; | |
294 | }; | |
295 | ||
296 | static struct irq_pin_list *irq_2_pin_head; | |
297 | /* fill one page ? */ | |
298 | static int nr_irq_2_pin = 0x100; | |
299 | static struct irq_pin_list *irq_2_pin_ptr; | |
300 | static void __init irq_2_pin_init_work(void *data) | |
301 | { | |
302 | struct dyn_array *da = data; | |
303 | struct irq_pin_list *pin; | |
304 | int i; | |
305 | ||
306 | pin = *da->name; | |
307 | ||
308 | for (i = 1; i < *da->nr; i++) | |
309 | pin[i-1].next = &pin[i]; | |
310 | ||
311 | irq_2_pin_ptr = &pin[0]; | |
312 | } | |
313 | DEFINE_DYN_ARRAY(irq_2_pin_head, sizeof(struct irq_pin_list), nr_irq_2_pin, PAGE_SIZE, irq_2_pin_init_work); | |
314 | ||
315 | static struct irq_pin_list *get_one_free_irq_2_pin(void) | |
316 | { | |
317 | struct irq_pin_list *pin; | |
318 | int i; | |
319 | ||
320 | pin = irq_2_pin_ptr; | |
321 | ||
322 | if (pin) { | |
323 | irq_2_pin_ptr = pin->next; | |
324 | pin->next = NULL; | |
325 | return pin; | |
326 | } | |
327 | ||
328 | /* | |
329 | * we run out of pre-allocate ones, allocate more | |
330 | */ | |
331 | printk(KERN_DEBUG "try to get more irq_2_pin %d\n", nr_irq_2_pin); | |
332 | ||
333 | if (after_bootmem) | |
334 | pin = kzalloc(sizeof(struct irq_pin_list)*nr_irq_2_pin, | |
335 | GFP_ATOMIC); | |
336 | else | |
337 | pin = __alloc_bootmem_nopanic(sizeof(struct irq_pin_list) * | |
338 | nr_irq_2_pin, PAGE_SIZE, 0); | |
339 | ||
340 | if (!pin) | |
341 | panic("can not get more irq_2_pin\n"); | |
301e6190 | 342 | |
0f978f45 YL |
343 | for (i = 1; i < nr_irq_2_pin; i++) |
344 | pin[i-1].next = &pin[i]; | |
345 | ||
346 | irq_2_pin_ptr = pin->next; | |
347 | pin->next = NULL; | |
348 | ||
349 | return pin; | |
350 | } | |
1da177e4 | 351 | |
130fe05d LT |
352 | struct io_apic { |
353 | unsigned int index; | |
354 | unsigned int unused[3]; | |
355 | unsigned int data; | |
356 | }; | |
357 | ||
358 | static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx) | |
359 | { | |
360 | return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx) | |
ec2cd0a2 | 361 | + (mp_ioapics[idx].mp_apicaddr & ~PAGE_MASK); |
130fe05d LT |
362 | } |
363 | ||
364 | static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) | |
365 | { | |
366 | struct io_apic __iomem *io_apic = io_apic_base(apic); | |
367 | writel(reg, &io_apic->index); | |
368 | return readl(&io_apic->data); | |
369 | } | |
370 | ||
371 | static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value) | |
372 | { | |
373 | struct io_apic __iomem *io_apic = io_apic_base(apic); | |
374 | writel(reg, &io_apic->index); | |
375 | writel(value, &io_apic->data); | |
376 | } | |
377 | ||
378 | /* | |
379 | * Re-write a value: to be used for read-modify-write | |
380 | * cycles where the read already set up the index register. | |
381 | * | |
382 | * Older SiS APIC requires we rewrite the index register | |
383 | */ | |
384 | static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value) | |
385 | { | |
54168ed7 IM |
386 | struct io_apic __iomem *io_apic = io_apic_base(apic); |
387 | if (sis_apic_bug) | |
388 | writel(reg, &io_apic->index); | |
130fe05d LT |
389 | writel(value, &io_apic->data); |
390 | } | |
391 | ||
047c8fdb YL |
392 | #ifdef CONFIG_X86_64 |
393 | static bool io_apic_level_ack_pending(unsigned int irq) | |
394 | { | |
395 | struct irq_pin_list *entry; | |
396 | unsigned long flags; | |
397 | struct irq_cfg *cfg = irq_cfg(irq); | |
398 | ||
399 | spin_lock_irqsave(&ioapic_lock, flags); | |
400 | entry = cfg->irq_2_pin; | |
401 | for (;;) { | |
402 | unsigned int reg; | |
403 | int pin; | |
404 | ||
405 | if (!entry) | |
406 | break; | |
407 | pin = entry->pin; | |
408 | reg = io_apic_read(entry->apic, 0x10 + pin*2); | |
409 | /* Is the remote IRR bit set? */ | |
410 | if (reg & IO_APIC_REDIR_REMOTE_IRR) { | |
411 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
412 | return true; | |
413 | } | |
414 | if (!entry->next) | |
415 | break; | |
416 | entry = entry->next; | |
417 | } | |
418 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
419 | ||
420 | return false; | |
421 | } | |
422 | #endif | |
423 | ||
cf4c6a2f AK |
424 | union entry_union { |
425 | struct { u32 w1, w2; }; | |
426 | struct IO_APIC_route_entry entry; | |
427 | }; | |
428 | ||
429 | static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin) | |
430 | { | |
431 | union entry_union eu; | |
432 | unsigned long flags; | |
433 | spin_lock_irqsave(&ioapic_lock, flags); | |
434 | eu.w1 = io_apic_read(apic, 0x10 + 2 * pin); | |
435 | eu.w2 = io_apic_read(apic, 0x11 + 2 * pin); | |
436 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
437 | return eu.entry; | |
438 | } | |
439 | ||
f9dadfa7 LT |
440 | /* |
441 | * When we write a new IO APIC routing entry, we need to write the high | |
442 | * word first! If the mask bit in the low word is clear, we will enable | |
443 | * the interrupt, and we need to make sure the entry is fully populated | |
444 | * before that happens. | |
445 | */ | |
d15512f4 AK |
446 | static void |
447 | __ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e) | |
cf4c6a2f | 448 | { |
cf4c6a2f AK |
449 | union entry_union eu; |
450 | eu.entry = e; | |
f9dadfa7 LT |
451 | io_apic_write(apic, 0x11 + 2*pin, eu.w2); |
452 | io_apic_write(apic, 0x10 + 2*pin, eu.w1); | |
d15512f4 AK |
453 | } |
454 | ||
455 | static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e) | |
456 | { | |
457 | unsigned long flags; | |
458 | spin_lock_irqsave(&ioapic_lock, flags); | |
459 | __ioapic_write_entry(apic, pin, e); | |
f9dadfa7 LT |
460 | spin_unlock_irqrestore(&ioapic_lock, flags); |
461 | } | |
462 | ||
463 | /* | |
464 | * When we mask an IO APIC routing entry, we need to write the low | |
465 | * word first, in order to set the mask bit before we change the | |
466 | * high bits! | |
467 | */ | |
468 | static void ioapic_mask_entry(int apic, int pin) | |
469 | { | |
470 | unsigned long flags; | |
471 | union entry_union eu = { .entry.mask = 1 }; | |
472 | ||
cf4c6a2f AK |
473 | spin_lock_irqsave(&ioapic_lock, flags); |
474 | io_apic_write(apic, 0x10 + 2*pin, eu.w1); | |
475 | io_apic_write(apic, 0x11 + 2*pin, eu.w2); | |
476 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
477 | } | |
478 | ||
497c9a19 YL |
479 | #ifdef CONFIG_SMP |
480 | static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, u8 vector) | |
481 | { | |
482 | int apic, pin; | |
483 | struct irq_cfg *cfg; | |
484 | struct irq_pin_list *entry; | |
485 | ||
486 | cfg = irq_cfg(irq); | |
487 | entry = cfg->irq_2_pin; | |
488 | for (;;) { | |
489 | unsigned int reg; | |
490 | ||
491 | if (!entry) | |
492 | break; | |
493 | ||
494 | apic = entry->apic; | |
495 | pin = entry->pin; | |
54168ed7 IM |
496 | #ifdef CONFIG_INTR_REMAP |
497 | /* | |
498 | * With interrupt-remapping, destination information comes | |
499 | * from interrupt-remapping table entry. | |
500 | */ | |
501 | if (!irq_remapped(irq)) | |
502 | io_apic_write(apic, 0x11 + pin*2, dest); | |
503 | #else | |
497c9a19 | 504 | io_apic_write(apic, 0x11 + pin*2, dest); |
54168ed7 | 505 | #endif |
497c9a19 YL |
506 | reg = io_apic_read(apic, 0x10 + pin*2); |
507 | reg &= ~IO_APIC_REDIR_VECTOR_MASK; | |
508 | reg |= vector; | |
54168ed7 | 509 | io_apic_modify(apic, 0x10 + pin*2, reg); |
497c9a19 YL |
510 | if (!entry->next) |
511 | break; | |
512 | entry = entry->next; | |
513 | } | |
514 | } | |
efa2559f YL |
515 | |
516 | static int assign_irq_vector(int irq, cpumask_t mask); | |
517 | ||
497c9a19 YL |
518 | static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask) |
519 | { | |
520 | struct irq_cfg *cfg; | |
521 | unsigned long flags; | |
522 | unsigned int dest; | |
523 | cpumask_t tmp; | |
54168ed7 | 524 | struct irq_desc *desc; |
497c9a19 | 525 | |
497c9a19 YL |
526 | cpus_and(tmp, mask, cpu_online_map); |
527 | if (cpus_empty(tmp)) | |
528 | return; | |
529 | ||
047c8fdb | 530 | cfg = irq_cfg(irq); |
497c9a19 YL |
531 | if (assign_irq_vector(irq, mask)) |
532 | return; | |
533 | ||
534 | cpus_and(tmp, cfg->domain, mask); | |
497c9a19 YL |
535 | dest = cpu_mask_to_apicid(tmp); |
536 | /* | |
537 | * Only the high 8 bits are valid. | |
538 | */ | |
539 | dest = SET_APIC_LOGICAL_ID(dest); | |
540 | ||
54168ed7 | 541 | desc = irq_to_desc(irq); |
497c9a19 YL |
542 | spin_lock_irqsave(&ioapic_lock, flags); |
543 | __target_IO_APIC_irq(irq, dest, cfg->vector); | |
54168ed7 | 544 | desc->affinity = mask; |
497c9a19 YL |
545 | spin_unlock_irqrestore(&ioapic_lock, flags); |
546 | } | |
497c9a19 YL |
547 | #endif /* CONFIG_SMP */ |
548 | ||
1da177e4 LT |
549 | /* |
550 | * The common case is 1:1 IRQ<->pin mappings. Sometimes there are | |
551 | * shared ISA-space IRQs, so we have to support them. We are super | |
552 | * fast in the common case, and fast for shared ISA-space IRQs. | |
553 | */ | |
554 | static void add_pin_to_irq(unsigned int irq, int apic, int pin) | |
555 | { | |
0f978f45 YL |
556 | struct irq_cfg *cfg; |
557 | struct irq_pin_list *entry; | |
558 | ||
559 | /* first time to refer irq_cfg, so with new */ | |
560 | cfg = irq_cfg_alloc(irq); | |
561 | entry = cfg->irq_2_pin; | |
562 | if (!entry) { | |
563 | entry = get_one_free_irq_2_pin(); | |
564 | cfg->irq_2_pin = entry; | |
565 | entry->apic = apic; | |
566 | entry->pin = pin; | |
567 | printk(KERN_DEBUG " 0 add_pin_to_irq: irq %d --> apic %d pin %d\n", irq, apic, pin); | |
568 | return; | |
569 | } | |
1da177e4 | 570 | |
0f978f45 YL |
571 | while (entry->next) { |
572 | /* not again, please */ | |
573 | if (entry->apic == apic && entry->pin == pin) | |
574 | return; | |
1da177e4 | 575 | |
0f978f45 | 576 | entry = entry->next; |
1da177e4 | 577 | } |
0f978f45 YL |
578 | |
579 | entry->next = get_one_free_irq_2_pin(); | |
580 | entry = entry->next; | |
1da177e4 LT |
581 | entry->apic = apic; |
582 | entry->pin = pin; | |
0f978f45 | 583 | printk(KERN_DEBUG " x add_pin_to_irq: irq %d --> apic %d pin %d\n", irq, apic, pin); |
1da177e4 LT |
584 | } |
585 | ||
586 | /* | |
587 | * Reroute an IRQ to a different pin. | |
588 | */ | |
589 | static void __init replace_pin_at_irq(unsigned int irq, | |
590 | int oldapic, int oldpin, | |
591 | int newapic, int newpin) | |
592 | { | |
0f978f45 YL |
593 | struct irq_cfg *cfg = irq_cfg(irq); |
594 | struct irq_pin_list *entry = cfg->irq_2_pin; | |
595 | int replaced = 0; | |
1da177e4 | 596 | |
0f978f45 | 597 | while (entry) { |
1da177e4 LT |
598 | if (entry->apic == oldapic && entry->pin == oldpin) { |
599 | entry->apic = newapic; | |
600 | entry->pin = newpin; | |
0f978f45 YL |
601 | replaced = 1; |
602 | /* every one is different, right? */ | |
1da177e4 | 603 | break; |
0f978f45 YL |
604 | } |
605 | entry = entry->next; | |
1da177e4 | 606 | } |
0f978f45 YL |
607 | |
608 | /* why? call replace before add? */ | |
609 | if (!replaced) | |
610 | add_pin_to_irq(irq, newapic, newpin); | |
1da177e4 LT |
611 | } |
612 | ||
047c8fdb YL |
613 | #ifdef CONFIG_X86_64 |
614 | /* | |
615 | * Synchronize the IO-APIC and the CPU by doing | |
616 | * a dummy read from the IO-APIC | |
617 | */ | |
618 | static inline void io_apic_sync(unsigned int apic) | |
619 | { | |
620 | struct io_apic __iomem *io_apic = io_apic_base(apic); | |
621 | readl(&io_apic->data); | |
622 | } | |
623 | ||
624 | #define __DO_ACTION(R, ACTION, FINAL) \ | |
625 | \ | |
626 | { \ | |
627 | int pin; \ | |
628 | struct irq_cfg *cfg; \ | |
629 | struct irq_pin_list *entry; \ | |
630 | \ | |
631 | cfg = irq_cfg(irq); \ | |
632 | entry = cfg->irq_2_pin; \ | |
633 | for (;;) { \ | |
634 | unsigned int reg; \ | |
635 | if (!entry) \ | |
636 | break; \ | |
637 | pin = entry->pin; \ | |
638 | reg = io_apic_read(entry->apic, 0x10 + R + pin*2); \ | |
639 | reg ACTION; \ | |
640 | io_apic_modify(entry->apic, 0x10 + R + pin*2, reg); \ | |
641 | FINAL; \ | |
642 | if (!entry->next) \ | |
643 | break; \ | |
644 | entry = entry->next; \ | |
645 | } \ | |
646 | } | |
647 | ||
648 | #define DO_ACTION(name,R,ACTION, FINAL) \ | |
649 | \ | |
650 | static void name##_IO_APIC_irq (unsigned int irq) \ | |
651 | __DO_ACTION(R, ACTION, FINAL) | |
652 | ||
653 | /* mask = 1 */ | |
654 | DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, io_apic_sync(entry->apic)) | |
655 | ||
656 | /* mask = 0 */ | |
657 | DO_ACTION(__unmask, 0, &= ~IO_APIC_REDIR_MASKED, ) | |
658 | ||
659 | #else | |
660 | ||
36062448 | 661 | static void __modify_IO_APIC_irq(unsigned int irq, unsigned long enable, unsigned long disable) |
1da177e4 | 662 | { |
0f978f45 YL |
663 | struct irq_cfg *cfg; |
664 | struct irq_pin_list *entry; | |
1da177e4 LT |
665 | unsigned int pin, reg; |
666 | ||
0f978f45 YL |
667 | cfg = irq_cfg(irq); |
668 | entry = cfg->irq_2_pin; | |
1da177e4 | 669 | for (;;) { |
0f978f45 | 670 | if (!entry) |
1da177e4 | 671 | break; |
0f978f45 | 672 | pin = entry->pin; |
1da177e4 LT |
673 | reg = io_apic_read(entry->apic, 0x10 + pin*2); |
674 | reg &= ~disable; | |
675 | reg |= enable; | |
676 | io_apic_modify(entry->apic, 0x10 + pin*2, reg); | |
677 | if (!entry->next) | |
678 | break; | |
0f978f45 | 679 | entry = entry->next; |
1da177e4 LT |
680 | } |
681 | } | |
682 | ||
683 | /* mask = 1 */ | |
36062448 | 684 | static void __mask_IO_APIC_irq(unsigned int irq) |
1da177e4 | 685 | { |
46b3b4ef | 686 | __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED, 0); |
1da177e4 LT |
687 | } |
688 | ||
689 | /* mask = 0 */ | |
36062448 | 690 | static void __unmask_IO_APIC_irq(unsigned int irq) |
1da177e4 | 691 | { |
46b3b4ef | 692 | __modify_IO_APIC_irq(irq, 0, IO_APIC_REDIR_MASKED); |
1da177e4 LT |
693 | } |
694 | ||
695 | /* mask = 1, trigger = 0 */ | |
36062448 | 696 | static void __mask_and_edge_IO_APIC_irq(unsigned int irq) |
1da177e4 | 697 | { |
46b3b4ef CG |
698 | __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED, |
699 | IO_APIC_REDIR_LEVEL_TRIGGER); | |
1da177e4 LT |
700 | } |
701 | ||
702 | /* mask = 0, trigger = 1 */ | |
36062448 | 703 | static void __unmask_and_level_IO_APIC_irq(unsigned int irq) |
1da177e4 | 704 | { |
46b3b4ef CG |
705 | __modify_IO_APIC_irq(irq, IO_APIC_REDIR_LEVEL_TRIGGER, |
706 | IO_APIC_REDIR_MASKED); | |
1da177e4 LT |
707 | } |
708 | ||
047c8fdb YL |
709 | #endif |
710 | ||
54168ed7 | 711 | static void mask_IO_APIC_irq (unsigned int irq) |
1da177e4 LT |
712 | { |
713 | unsigned long flags; | |
714 | ||
715 | spin_lock_irqsave(&ioapic_lock, flags); | |
716 | __mask_IO_APIC_irq(irq); | |
717 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
718 | } | |
719 | ||
54168ed7 | 720 | static void unmask_IO_APIC_irq (unsigned int irq) |
1da177e4 LT |
721 | { |
722 | unsigned long flags; | |
723 | ||
724 | spin_lock_irqsave(&ioapic_lock, flags); | |
725 | __unmask_IO_APIC_irq(irq); | |
726 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
727 | } | |
728 | ||
729 | static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin) | |
730 | { | |
731 | struct IO_APIC_route_entry entry; | |
36062448 | 732 | |
1da177e4 | 733 | /* Check delivery_mode to be sure we're not clearing an SMI pin */ |
cf4c6a2f | 734 | entry = ioapic_read_entry(apic, pin); |
1da177e4 LT |
735 | if (entry.delivery_mode == dest_SMI) |
736 | return; | |
1da177e4 LT |
737 | /* |
738 | * Disable it in the IO-APIC irq-routing table: | |
739 | */ | |
f9dadfa7 | 740 | ioapic_mask_entry(apic, pin); |
1da177e4 LT |
741 | } |
742 | ||
54168ed7 | 743 | static void clear_IO_APIC (void) |
1da177e4 LT |
744 | { |
745 | int apic, pin; | |
746 | ||
747 | for (apic = 0; apic < nr_ioapics; apic++) | |
748 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) | |
749 | clear_IO_APIC_pin(apic, pin); | |
750 | } | |
751 | ||
54168ed7 | 752 | #if !defined(CONFIG_SMP) && defined(CONFIG_X86_32) |
75604d7f | 753 | void send_IPI_self(int vector) |
1da177e4 LT |
754 | { |
755 | unsigned int cfg; | |
756 | ||
757 | /* | |
758 | * Wait for idle. | |
759 | */ | |
760 | apic_wait_icr_idle(); | |
761 | cfg = APIC_DM_FIXED | APIC_DEST_SELF | vector | APIC_DEST_LOGICAL; | |
762 | /* | |
763 | * Send the IPI. The write to APIC_ICR fires this off. | |
764 | */ | |
593f4a78 | 765 | apic_write(APIC_ICR, cfg); |
1da177e4 | 766 | } |
54168ed7 | 767 | #endif /* !CONFIG_SMP && CONFIG_X86_32*/ |
1da177e4 | 768 | |
54168ed7 | 769 | #ifdef CONFIG_X86_32 |
1da177e4 LT |
770 | /* |
771 | * support for broken MP BIOSs, enables hand-redirection of PIRQ0-7 to | |
772 | * specific CPU-side IRQs. | |
773 | */ | |
774 | ||
775 | #define MAX_PIRQS 8 | |
776 | static int pirq_entries [MAX_PIRQS]; | |
777 | static int pirqs_enabled; | |
1da177e4 | 778 | |
1da177e4 LT |
779 | static int __init ioapic_pirq_setup(char *str) |
780 | { | |
781 | int i, max; | |
782 | int ints[MAX_PIRQS+1]; | |
783 | ||
784 | get_options(str, ARRAY_SIZE(ints), ints); | |
785 | ||
786 | for (i = 0; i < MAX_PIRQS; i++) | |
787 | pirq_entries[i] = -1; | |
788 | ||
789 | pirqs_enabled = 1; | |
790 | apic_printk(APIC_VERBOSE, KERN_INFO | |
791 | "PIRQ redirection, working around broken MP-BIOS.\n"); | |
792 | max = MAX_PIRQS; | |
793 | if (ints[0] < MAX_PIRQS) | |
794 | max = ints[0]; | |
795 | ||
796 | for (i = 0; i < max; i++) { | |
797 | apic_printk(APIC_VERBOSE, KERN_DEBUG | |
798 | "... PIRQ%d -> IRQ %d\n", i, ints[i+1]); | |
799 | /* | |
800 | * PIRQs are mapped upside down, usually. | |
801 | */ | |
802 | pirq_entries[MAX_PIRQS-i-1] = ints[i+1]; | |
803 | } | |
804 | return 1; | |
805 | } | |
806 | ||
807 | __setup("pirq=", ioapic_pirq_setup); | |
54168ed7 IM |
808 | #endif /* CONFIG_X86_32 */ |
809 | ||
810 | #ifdef CONFIG_INTR_REMAP | |
811 | /* I/O APIC RTE contents at the OS boot up */ | |
812 | static struct IO_APIC_route_entry *early_ioapic_entries[MAX_IO_APICS]; | |
813 | ||
814 | /* | |
815 | * Saves and masks all the unmasked IO-APIC RTE's | |
816 | */ | |
817 | int save_mask_IO_APIC_setup(void) | |
818 | { | |
819 | union IO_APIC_reg_01 reg_01; | |
820 | unsigned long flags; | |
821 | int apic, pin; | |
822 | ||
823 | /* | |
824 | * The number of IO-APIC IRQ registers (== #pins): | |
825 | */ | |
826 | for (apic = 0; apic < nr_ioapics; apic++) { | |
827 | spin_lock_irqsave(&ioapic_lock, flags); | |
828 | reg_01.raw = io_apic_read(apic, 1); | |
829 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
830 | nr_ioapic_registers[apic] = reg_01.bits.entries+1; | |
831 | } | |
832 | ||
833 | for (apic = 0; apic < nr_ioapics; apic++) { | |
834 | early_ioapic_entries[apic] = | |
835 | kzalloc(sizeof(struct IO_APIC_route_entry) * | |
836 | nr_ioapic_registers[apic], GFP_KERNEL); | |
837 | if (!early_ioapic_entries[apic]) | |
838 | return -ENOMEM; | |
839 | } | |
840 | ||
841 | for (apic = 0; apic < nr_ioapics; apic++) | |
842 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { | |
843 | struct IO_APIC_route_entry entry; | |
844 | ||
845 | entry = early_ioapic_entries[apic][pin] = | |
846 | ioapic_read_entry(apic, pin); | |
847 | if (!entry.mask) { | |
848 | entry.mask = 1; | |
849 | ioapic_write_entry(apic, pin, entry); | |
850 | } | |
851 | } | |
852 | return 0; | |
853 | } | |
854 | ||
855 | void restore_IO_APIC_setup(void) | |
856 | { | |
857 | int apic, pin; | |
858 | ||
859 | for (apic = 0; apic < nr_ioapics; apic++) | |
860 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) | |
861 | ioapic_write_entry(apic, pin, | |
862 | early_ioapic_entries[apic][pin]); | |
863 | } | |
864 | ||
865 | void reinit_intr_remapped_IO_APIC(int intr_remapping) | |
866 | { | |
867 | /* | |
868 | * for now plain restore of previous settings. | |
869 | * TBD: In the case of OS enabling interrupt-remapping, | |
870 | * IO-APIC RTE's need to be setup to point to interrupt-remapping | |
871 | * table entries. for now, do a plain restore, and wait for | |
872 | * the setup_IO_APIC_irqs() to do proper initialization. | |
873 | */ | |
874 | restore_IO_APIC_setup(); | |
875 | } | |
876 | #endif | |
1da177e4 LT |
877 | |
878 | /* | |
879 | * Find the IRQ entry number of a certain pin. | |
880 | */ | |
881 | static int find_irq_entry(int apic, int pin, int type) | |
882 | { | |
883 | int i; | |
884 | ||
885 | for (i = 0; i < mp_irq_entries; i++) | |
2fddb6e2 AS |
886 | if (mp_irqs[i].mp_irqtype == type && |
887 | (mp_irqs[i].mp_dstapic == mp_ioapics[apic].mp_apicid || | |
888 | mp_irqs[i].mp_dstapic == MP_APIC_ALL) && | |
889 | mp_irqs[i].mp_dstirq == pin) | |
1da177e4 LT |
890 | return i; |
891 | ||
892 | return -1; | |
893 | } | |
894 | ||
895 | /* | |
896 | * Find the pin to which IRQ[irq] (ISA) is connected | |
897 | */ | |
fcfd636a | 898 | static int __init find_isa_irq_pin(int irq, int type) |
1da177e4 LT |
899 | { |
900 | int i; | |
901 | ||
902 | for (i = 0; i < mp_irq_entries; i++) { | |
2fddb6e2 | 903 | int lbus = mp_irqs[i].mp_srcbus; |
1da177e4 | 904 | |
d27e2b8e | 905 | if (test_bit(lbus, mp_bus_not_pci) && |
2fddb6e2 AS |
906 | (mp_irqs[i].mp_irqtype == type) && |
907 | (mp_irqs[i].mp_srcbusirq == irq)) | |
1da177e4 | 908 | |
2fddb6e2 | 909 | return mp_irqs[i].mp_dstirq; |
1da177e4 LT |
910 | } |
911 | return -1; | |
912 | } | |
913 | ||
fcfd636a EB |
914 | static int __init find_isa_irq_apic(int irq, int type) |
915 | { | |
916 | int i; | |
917 | ||
918 | for (i = 0; i < mp_irq_entries; i++) { | |
2fddb6e2 | 919 | int lbus = mp_irqs[i].mp_srcbus; |
fcfd636a | 920 | |
73b2961b | 921 | if (test_bit(lbus, mp_bus_not_pci) && |
2fddb6e2 AS |
922 | (mp_irqs[i].mp_irqtype == type) && |
923 | (mp_irqs[i].mp_srcbusirq == irq)) | |
fcfd636a EB |
924 | break; |
925 | } | |
926 | if (i < mp_irq_entries) { | |
927 | int apic; | |
54168ed7 | 928 | for(apic = 0; apic < nr_ioapics; apic++) { |
2fddb6e2 | 929 | if (mp_ioapics[apic].mp_apicid == mp_irqs[i].mp_dstapic) |
fcfd636a EB |
930 | return apic; |
931 | } | |
932 | } | |
933 | ||
934 | return -1; | |
935 | } | |
936 | ||
1da177e4 LT |
937 | /* |
938 | * Find a specific PCI IRQ entry. | |
939 | * Not an __init, possibly needed by modules | |
940 | */ | |
941 | static int pin_2_irq(int idx, int apic, int pin); | |
942 | ||
943 | int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin) | |
944 | { | |
945 | int apic, i, best_guess = -1; | |
946 | ||
54168ed7 IM |
947 | apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n", |
948 | bus, slot, pin); | |
ce6444d3 | 949 | if (test_bit(bus, mp_bus_not_pci)) { |
54168ed7 | 950 | apic_printk(APIC_VERBOSE, "PCI BIOS passed nonexistent PCI bus %d!\n", bus); |
1da177e4 LT |
951 | return -1; |
952 | } | |
953 | for (i = 0; i < mp_irq_entries; i++) { | |
2fddb6e2 | 954 | int lbus = mp_irqs[i].mp_srcbus; |
1da177e4 LT |
955 | |
956 | for (apic = 0; apic < nr_ioapics; apic++) | |
2fddb6e2 AS |
957 | if (mp_ioapics[apic].mp_apicid == mp_irqs[i].mp_dstapic || |
958 | mp_irqs[i].mp_dstapic == MP_APIC_ALL) | |
1da177e4 LT |
959 | break; |
960 | ||
47cab822 | 961 | if (!test_bit(lbus, mp_bus_not_pci) && |
2fddb6e2 | 962 | !mp_irqs[i].mp_irqtype && |
1da177e4 | 963 | (bus == lbus) && |
2fddb6e2 | 964 | (slot == ((mp_irqs[i].mp_srcbusirq >> 2) & 0x1f))) { |
54168ed7 | 965 | int irq = pin_2_irq(i,apic,mp_irqs[i].mp_dstirq); |
1da177e4 LT |
966 | |
967 | if (!(apic || IO_APIC_IRQ(irq))) | |
968 | continue; | |
969 | ||
2fddb6e2 | 970 | if (pin == (mp_irqs[i].mp_srcbusirq & 3)) |
1da177e4 LT |
971 | return irq; |
972 | /* | |
973 | * Use the first all-but-pin matching entry as a | |
974 | * best-guess fuzzy result for broken mptables. | |
975 | */ | |
976 | if (best_guess < 0) | |
977 | best_guess = irq; | |
978 | } | |
979 | } | |
980 | return best_guess; | |
981 | } | |
54168ed7 | 982 | |
129f6946 | 983 | EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector); |
1da177e4 | 984 | |
c0a282c2 | 985 | #if defined(CONFIG_EISA) || defined(CONFIG_MCA) |
1da177e4 LT |
986 | /* |
987 | * EISA Edge/Level control register, ELCR | |
988 | */ | |
989 | static int EISA_ELCR(unsigned int irq) | |
990 | { | |
991 | if (irq < 16) { | |
992 | unsigned int port = 0x4d0 + (irq >> 3); | |
993 | return (inb(port) >> (irq & 7)) & 1; | |
994 | } | |
995 | apic_printk(APIC_VERBOSE, KERN_INFO | |
996 | "Broken MPtable reports ISA irq %d\n", irq); | |
997 | return 0; | |
998 | } | |
54168ed7 | 999 | |
c0a282c2 | 1000 | #endif |
1da177e4 | 1001 | |
6728801d AS |
1002 | /* ISA interrupts are always polarity zero edge triggered, |
1003 | * when listed as conforming in the MP table. */ | |
1004 | ||
1005 | #define default_ISA_trigger(idx) (0) | |
1006 | #define default_ISA_polarity(idx) (0) | |
1007 | ||
1da177e4 LT |
1008 | /* EISA interrupts are always polarity zero and can be edge or level |
1009 | * trigger depending on the ELCR value. If an interrupt is listed as | |
1010 | * EISA conforming in the MP table, that means its trigger type must | |
1011 | * be read in from the ELCR */ | |
1012 | ||
2fddb6e2 | 1013 | #define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mp_srcbusirq)) |
6728801d | 1014 | #define default_EISA_polarity(idx) default_ISA_polarity(idx) |
1da177e4 LT |
1015 | |
1016 | /* PCI interrupts are always polarity one level triggered, | |
1017 | * when listed as conforming in the MP table. */ | |
1018 | ||
1019 | #define default_PCI_trigger(idx) (1) | |
1020 | #define default_PCI_polarity(idx) (1) | |
1021 | ||
1022 | /* MCA interrupts are always polarity zero level triggered, | |
1023 | * when listed as conforming in the MP table. */ | |
1024 | ||
1025 | #define default_MCA_trigger(idx) (1) | |
6728801d | 1026 | #define default_MCA_polarity(idx) default_ISA_polarity(idx) |
1da177e4 | 1027 | |
61fd47e0 | 1028 | static int MPBIOS_polarity(int idx) |
1da177e4 | 1029 | { |
2fddb6e2 | 1030 | int bus = mp_irqs[idx].mp_srcbus; |
1da177e4 LT |
1031 | int polarity; |
1032 | ||
1033 | /* | |
1034 | * Determine IRQ line polarity (high active or low active): | |
1035 | */ | |
54168ed7 | 1036 | switch (mp_irqs[idx].mp_irqflag & 3) |
36062448 | 1037 | { |
54168ed7 IM |
1038 | case 0: /* conforms, ie. bus-type dependent polarity */ |
1039 | if (test_bit(bus, mp_bus_not_pci)) | |
1040 | polarity = default_ISA_polarity(idx); | |
1041 | else | |
1042 | polarity = default_PCI_polarity(idx); | |
1043 | break; | |
1044 | case 1: /* high active */ | |
1045 | { | |
1046 | polarity = 0; | |
1047 | break; | |
1048 | } | |
1049 | case 2: /* reserved */ | |
1050 | { | |
1051 | printk(KERN_WARNING "broken BIOS!!\n"); | |
1052 | polarity = 1; | |
1053 | break; | |
1054 | } | |
1055 | case 3: /* low active */ | |
1056 | { | |
1057 | polarity = 1; | |
1058 | break; | |
1059 | } | |
1060 | default: /* invalid */ | |
1061 | { | |
1062 | printk(KERN_WARNING "broken BIOS!!\n"); | |
1063 | polarity = 1; | |
1064 | break; | |
1065 | } | |
1da177e4 LT |
1066 | } |
1067 | return polarity; | |
1068 | } | |
1069 | ||
1070 | static int MPBIOS_trigger(int idx) | |
1071 | { | |
2fddb6e2 | 1072 | int bus = mp_irqs[idx].mp_srcbus; |
1da177e4 LT |
1073 | int trigger; |
1074 | ||
1075 | /* | |
1076 | * Determine IRQ trigger mode (edge or level sensitive): | |
1077 | */ | |
54168ed7 | 1078 | switch ((mp_irqs[idx].mp_irqflag>>2) & 3) |
1da177e4 | 1079 | { |
54168ed7 IM |
1080 | case 0: /* conforms, ie. bus-type dependent */ |
1081 | if (test_bit(bus, mp_bus_not_pci)) | |
1082 | trigger = default_ISA_trigger(idx); | |
1083 | else | |
1084 | trigger = default_PCI_trigger(idx); | |
c0a282c2 | 1085 | #if defined(CONFIG_EISA) || defined(CONFIG_MCA) |
54168ed7 IM |
1086 | switch (mp_bus_id_to_type[bus]) { |
1087 | case MP_BUS_ISA: /* ISA pin */ | |
1088 | { | |
1089 | /* set before the switch */ | |
1090 | break; | |
1091 | } | |
1092 | case MP_BUS_EISA: /* EISA pin */ | |
1093 | { | |
1094 | trigger = default_EISA_trigger(idx); | |
1095 | break; | |
1096 | } | |
1097 | case MP_BUS_PCI: /* PCI pin */ | |
1098 | { | |
1099 | /* set before the switch */ | |
1100 | break; | |
1101 | } | |
1102 | case MP_BUS_MCA: /* MCA pin */ | |
1103 | { | |
1104 | trigger = default_MCA_trigger(idx); | |
1105 | break; | |
1106 | } | |
1107 | default: | |
1108 | { | |
1109 | printk(KERN_WARNING "broken BIOS!!\n"); | |
1110 | trigger = 1; | |
1111 | break; | |
1112 | } | |
1113 | } | |
1114 | #endif | |
1da177e4 | 1115 | break; |
54168ed7 | 1116 | case 1: /* edge */ |
1da177e4 | 1117 | { |
54168ed7 | 1118 | trigger = 0; |
1da177e4 LT |
1119 | break; |
1120 | } | |
54168ed7 | 1121 | case 2: /* reserved */ |
1da177e4 | 1122 | { |
54168ed7 IM |
1123 | printk(KERN_WARNING "broken BIOS!!\n"); |
1124 | trigger = 1; | |
1da177e4 LT |
1125 | break; |
1126 | } | |
54168ed7 | 1127 | case 3: /* level */ |
1da177e4 | 1128 | { |
54168ed7 | 1129 | trigger = 1; |
1da177e4 LT |
1130 | break; |
1131 | } | |
54168ed7 | 1132 | default: /* invalid */ |
1da177e4 LT |
1133 | { |
1134 | printk(KERN_WARNING "broken BIOS!!\n"); | |
54168ed7 | 1135 | trigger = 0; |
1da177e4 LT |
1136 | break; |
1137 | } | |
1138 | } | |
1139 | return trigger; | |
1140 | } | |
1141 | ||
1142 | static inline int irq_polarity(int idx) | |
1143 | { | |
1144 | return MPBIOS_polarity(idx); | |
1145 | } | |
1146 | ||
1147 | static inline int irq_trigger(int idx) | |
1148 | { | |
1149 | return MPBIOS_trigger(idx); | |
1150 | } | |
1151 | ||
efa2559f | 1152 | int (*ioapic_renumber_irq)(int ioapic, int irq); |
1da177e4 LT |
1153 | static int pin_2_irq(int idx, int apic, int pin) |
1154 | { | |
1155 | int irq, i; | |
2fddb6e2 | 1156 | int bus = mp_irqs[idx].mp_srcbus; |
1da177e4 LT |
1157 | |
1158 | /* | |
1159 | * Debugging check, we are in big trouble if this message pops up! | |
1160 | */ | |
2fddb6e2 | 1161 | if (mp_irqs[idx].mp_dstirq != pin) |
1da177e4 LT |
1162 | printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n"); |
1163 | ||
54168ed7 | 1164 | if (test_bit(bus, mp_bus_not_pci)) { |
2fddb6e2 | 1165 | irq = mp_irqs[idx].mp_srcbusirq; |
54168ed7 | 1166 | } else { |
643befed AS |
1167 | /* |
1168 | * PCI IRQs are mapped in order | |
1169 | */ | |
1170 | i = irq = 0; | |
1171 | while (i < apic) | |
1172 | irq += nr_ioapic_registers[i++]; | |
1173 | irq += pin; | |
54168ed7 IM |
1174 | /* |
1175 | * For MPS mode, so far only needed by ES7000 platform | |
1176 | */ | |
1177 | if (ioapic_renumber_irq) | |
1178 | irq = ioapic_renumber_irq(apic, irq); | |
1da177e4 LT |
1179 | } |
1180 | ||
54168ed7 | 1181 | #ifdef CONFIG_X86_32 |
1da177e4 LT |
1182 | /* |
1183 | * PCI IRQ command line redirection. Yes, limits are hardcoded. | |
1184 | */ | |
1185 | if ((pin >= 16) && (pin <= 23)) { | |
1186 | if (pirq_entries[pin-16] != -1) { | |
1187 | if (!pirq_entries[pin-16]) { | |
1188 | apic_printk(APIC_VERBOSE, KERN_DEBUG | |
1189 | "disabling PIRQ%d\n", pin-16); | |
1190 | } else { | |
1191 | irq = pirq_entries[pin-16]; | |
1192 | apic_printk(APIC_VERBOSE, KERN_DEBUG | |
1193 | "using PIRQ%d -> IRQ %d\n", | |
1194 | pin-16, irq); | |
1195 | } | |
1196 | } | |
1197 | } | |
54168ed7 IM |
1198 | #endif |
1199 | ||
1da177e4 LT |
1200 | return irq; |
1201 | } | |
1202 | ||
497c9a19 YL |
1203 | void lock_vector_lock(void) |
1204 | { | |
1205 | /* Used to the online set of cpus does not change | |
1206 | * during assign_irq_vector. | |
1207 | */ | |
1208 | spin_lock(&vector_lock); | |
1209 | } | |
1da177e4 | 1210 | |
497c9a19 | 1211 | void unlock_vector_lock(void) |
1da177e4 | 1212 | { |
497c9a19 YL |
1213 | spin_unlock(&vector_lock); |
1214 | } | |
1da177e4 | 1215 | |
497c9a19 YL |
1216 | static int __assign_irq_vector(int irq, cpumask_t mask) |
1217 | { | |
047c8fdb YL |
1218 | /* |
1219 | * NOTE! The local APIC isn't very good at handling | |
1220 | * multiple interrupts at the same interrupt level. | |
1221 | * As the interrupt level is determined by taking the | |
1222 | * vector number and shifting that right by 4, we | |
1223 | * want to spread these out a bit so that they don't | |
1224 | * all fall in the same interrupt level. | |
1225 | * | |
1226 | * Also, we've got to be careful not to trash gate | |
1227 | * 0x80, because int 0x80 is hm, kind of importantish. ;) | |
1228 | */ | |
54168ed7 IM |
1229 | static int current_vector = FIRST_DEVICE_VECTOR, current_offset = 0; |
1230 | unsigned int old_vector; | |
1231 | int cpu; | |
1232 | struct irq_cfg *cfg; | |
ace80ab7 | 1233 | |
54168ed7 | 1234 | cfg = irq_cfg(irq); |
8339f000 | 1235 | |
54168ed7 IM |
1236 | /* Only try and allocate irqs on cpus that are present */ |
1237 | cpus_and(mask, mask, cpu_online_map); | |
ace80ab7 | 1238 | |
54168ed7 IM |
1239 | if ((cfg->move_in_progress) || cfg->move_cleanup_count) |
1240 | return -EBUSY; | |
0a1ad60d | 1241 | |
54168ed7 IM |
1242 | old_vector = cfg->vector; |
1243 | if (old_vector) { | |
1244 | cpumask_t tmp; | |
1245 | cpus_and(tmp, cfg->domain, mask); | |
1246 | if (!cpus_empty(tmp)) | |
1247 | return 0; | |
1248 | } | |
497c9a19 | 1249 | |
54168ed7 IM |
1250 | for_each_cpu_mask_nr(cpu, mask) { |
1251 | cpumask_t domain, new_mask; | |
1252 | int new_cpu; | |
1253 | int vector, offset; | |
497c9a19 | 1254 | |
54168ed7 IM |
1255 | domain = vector_allocation_domain(cpu); |
1256 | cpus_and(new_mask, domain, cpu_online_map); | |
497c9a19 | 1257 | |
54168ed7 IM |
1258 | vector = current_vector; |
1259 | offset = current_offset; | |
497c9a19 | 1260 | next: |
54168ed7 IM |
1261 | vector += 8; |
1262 | if (vector >= first_system_vector) { | |
1263 | /* If we run out of vectors on large boxen, must share them. */ | |
1264 | offset = (offset + 1) % 8; | |
1265 | vector = FIRST_DEVICE_VECTOR + offset; | |
1266 | } | |
1267 | if (unlikely(current_vector == vector)) | |
1268 | continue; | |
047c8fdb | 1269 | #ifdef CONFIG_X86_64 |
54168ed7 IM |
1270 | if (vector == IA32_SYSCALL_VECTOR) |
1271 | goto next; | |
047c8fdb | 1272 | #else |
54168ed7 IM |
1273 | if (vector == SYSCALL_VECTOR) |
1274 | goto next; | |
047c8fdb | 1275 | #endif |
54168ed7 IM |
1276 | for_each_cpu_mask_nr(new_cpu, new_mask) |
1277 | if (per_cpu(vector_irq, new_cpu)[vector] != -1) | |
1278 | goto next; | |
1279 | /* Found one! */ | |
1280 | current_vector = vector; | |
1281 | current_offset = offset; | |
1282 | if (old_vector) { | |
1283 | cfg->move_in_progress = 1; | |
1284 | cfg->old_domain = cfg->domain; | |
7a959cff | 1285 | } |
54168ed7 IM |
1286 | for_each_cpu_mask_nr(new_cpu, new_mask) |
1287 | per_cpu(vector_irq, new_cpu)[vector] = irq; | |
1288 | cfg->vector = vector; | |
1289 | cfg->domain = domain; | |
1290 | return 0; | |
1291 | } | |
1292 | return -ENOSPC; | |
497c9a19 YL |
1293 | } |
1294 | ||
1295 | static int assign_irq_vector(int irq, cpumask_t mask) | |
1296 | { | |
1297 | int err; | |
ace80ab7 | 1298 | unsigned long flags; |
ace80ab7 EB |
1299 | |
1300 | spin_lock_irqsave(&vector_lock, flags); | |
497c9a19 | 1301 | err = __assign_irq_vector(irq, mask); |
26a3c49c | 1302 | spin_unlock_irqrestore(&vector_lock, flags); |
497c9a19 YL |
1303 | return err; |
1304 | } | |
1305 | ||
1306 | static void __clear_irq_vector(int irq) | |
1307 | { | |
1308 | struct irq_cfg *cfg; | |
1309 | cpumask_t mask; | |
1310 | int cpu, vector; | |
1311 | ||
1312 | cfg = irq_cfg(irq); | |
1313 | BUG_ON(!cfg->vector); | |
1314 | ||
1315 | vector = cfg->vector; | |
1316 | cpus_and(mask, cfg->domain, cpu_online_map); | |
1317 | for_each_cpu_mask_nr(cpu, mask) | |
1318 | per_cpu(vector_irq, cpu)[vector] = -1; | |
1319 | ||
1320 | cfg->vector = 0; | |
1321 | cpus_clear(cfg->domain); | |
1322 | } | |
1323 | ||
1324 | void __setup_vector_irq(int cpu) | |
1325 | { | |
1326 | /* Initialize vector_irq on a new cpu */ | |
1327 | /* This function must be called with vector_lock held */ | |
1328 | int irq, vector; | |
1329 | struct irq_cfg *cfg; | |
1330 | ||
1331 | /* Mark the inuse vectors */ | |
1332 | for_each_irq_cfg(cfg) { | |
1333 | if (!cpu_isset(cpu, cfg->domain)) | |
1334 | continue; | |
1335 | vector = cfg->vector; | |
1336 | irq = cfg->irq; | |
1337 | per_cpu(vector_irq, cpu)[vector] = irq; | |
1338 | } | |
1339 | /* Mark the free vectors */ | |
1340 | for (vector = 0; vector < NR_VECTORS; ++vector) { | |
1341 | irq = per_cpu(vector_irq, cpu)[vector]; | |
1342 | if (irq < 0) | |
1343 | continue; | |
1344 | ||
1345 | cfg = irq_cfg(irq); | |
1346 | if (!cpu_isset(cpu, cfg->domain)) | |
1347 | per_cpu(vector_irq, cpu)[vector] = -1; | |
54168ed7 | 1348 | } |
1da177e4 | 1349 | } |
3fde6900 | 1350 | |
f5b9ed7a | 1351 | static struct irq_chip ioapic_chip; |
54168ed7 IM |
1352 | #ifdef CONFIG_INTR_REMAP |
1353 | static struct irq_chip ir_ioapic_chip; | |
1354 | #endif | |
1da177e4 | 1355 | |
54168ed7 IM |
1356 | #define IOAPIC_AUTO -1 |
1357 | #define IOAPIC_EDGE 0 | |
1358 | #define IOAPIC_LEVEL 1 | |
1da177e4 | 1359 | |
047c8fdb | 1360 | #ifdef CONFIG_X86_32 |
1d025192 YL |
1361 | static inline int IO_APIC_irq_trigger(int irq) |
1362 | { | |
54168ed7 | 1363 | int apic, idx, pin; |
1d025192 | 1364 | |
54168ed7 IM |
1365 | for (apic = 0; apic < nr_ioapics; apic++) { |
1366 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { | |
1367 | idx = find_irq_entry(apic, pin, mp_INT); | |
1368 | if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin))) | |
1369 | return irq_trigger(idx); | |
1370 | } | |
1371 | } | |
1372 | /* | |
1373 | * nonexistent IRQs are edge default | |
1374 | */ | |
1375 | return 0; | |
1d025192 | 1376 | } |
047c8fdb YL |
1377 | #else |
1378 | static inline int IO_APIC_irq_trigger(int irq) | |
1379 | { | |
54168ed7 | 1380 | return 1; |
047c8fdb YL |
1381 | } |
1382 | #endif | |
1d025192 | 1383 | |
497c9a19 | 1384 | static void ioapic_register_intr(int irq, unsigned long trigger) |
1da177e4 | 1385 | { |
08678b08 YL |
1386 | struct irq_desc *desc; |
1387 | ||
199751d7 YL |
1388 | /* first time to use this irq_desc */ |
1389 | if (irq < 16) | |
1390 | desc = irq_to_desc(irq); | |
1391 | else | |
1392 | desc = irq_to_desc_alloc(irq); | |
1393 | ||
6ebcc00e | 1394 | if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || |
047c8fdb | 1395 | trigger == IOAPIC_LEVEL) |
08678b08 | 1396 | desc->status |= IRQ_LEVEL; |
047c8fdb YL |
1397 | else |
1398 | desc->status &= ~IRQ_LEVEL; | |
1399 | ||
54168ed7 IM |
1400 | #ifdef CONFIG_INTR_REMAP |
1401 | if (irq_remapped(irq)) { | |
1402 | desc->status |= IRQ_MOVE_PCNTXT; | |
1403 | if (trigger) | |
1404 | set_irq_chip_and_handler_name(irq, &ir_ioapic_chip, | |
1405 | handle_fasteoi_irq, | |
1406 | "fasteoi"); | |
1407 | else | |
1408 | set_irq_chip_and_handler_name(irq, &ir_ioapic_chip, | |
1409 | handle_edge_irq, "edge"); | |
1410 | return; | |
1411 | } | |
1412 | #endif | |
047c8fdb YL |
1413 | if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || |
1414 | trigger == IOAPIC_LEVEL) | |
a460e745 | 1415 | set_irq_chip_and_handler_name(irq, &ioapic_chip, |
54168ed7 IM |
1416 | handle_fasteoi_irq, |
1417 | "fasteoi"); | |
047c8fdb | 1418 | else |
a460e745 | 1419 | set_irq_chip_and_handler_name(irq, &ioapic_chip, |
54168ed7 | 1420 | handle_edge_irq, "edge"); |
1da177e4 LT |
1421 | } |
1422 | ||
497c9a19 YL |
1423 | static int setup_ioapic_entry(int apic, int irq, |
1424 | struct IO_APIC_route_entry *entry, | |
1425 | unsigned int destination, int trigger, | |
1426 | int polarity, int vector) | |
1da177e4 | 1427 | { |
497c9a19 YL |
1428 | /* |
1429 | * add it to the IO-APIC irq-routing table: | |
1430 | */ | |
1431 | memset(entry,0,sizeof(*entry)); | |
1432 | ||
54168ed7 IM |
1433 | #ifdef CONFIG_INTR_REMAP |
1434 | if (intr_remapping_enabled) { | |
1435 | struct intel_iommu *iommu = map_ioapic_to_ir(apic); | |
1436 | struct irte irte; | |
1437 | struct IR_IO_APIC_route_entry *ir_entry = | |
1438 | (struct IR_IO_APIC_route_entry *) entry; | |
1439 | int index; | |
1440 | ||
1441 | if (!iommu) | |
1442 | panic("No mapping iommu for ioapic %d\n", apic); | |
1443 | ||
1444 | index = alloc_irte(iommu, irq, 1); | |
1445 | if (index < 0) | |
1446 | panic("Failed to allocate IRTE for ioapic %d\n", apic); | |
1447 | ||
1448 | memset(&irte, 0, sizeof(irte)); | |
1449 | ||
1450 | irte.present = 1; | |
1451 | irte.dst_mode = INT_DEST_MODE; | |
1452 | irte.trigger_mode = trigger; | |
1453 | irte.dlvry_mode = INT_DELIVERY_MODE; | |
1454 | irte.vector = vector; | |
1455 | irte.dest_id = IRTE_DEST(destination); | |
1456 | ||
1457 | modify_irte(irq, &irte); | |
1458 | ||
1459 | ir_entry->index2 = (index >> 15) & 0x1; | |
1460 | ir_entry->zero = 0; | |
1461 | ir_entry->format = 1; | |
1462 | ir_entry->index = (index & 0x7fff); | |
1463 | } else | |
1464 | #endif | |
1465 | { | |
1466 | entry->delivery_mode = INT_DELIVERY_MODE; | |
1467 | entry->dest_mode = INT_DEST_MODE; | |
1468 | entry->dest = destination; | |
1469 | } | |
497c9a19 | 1470 | |
54168ed7 | 1471 | entry->mask = 0; /* enable IRQ */ |
497c9a19 YL |
1472 | entry->trigger = trigger; |
1473 | entry->polarity = polarity; | |
1474 | entry->vector = vector; | |
1475 | ||
1476 | /* Mask level triggered irqs. | |
1477 | * Use IRQ_DELAYED_DISABLE for edge triggered irqs. | |
1478 | */ | |
1479 | if (trigger) | |
1480 | entry->mask = 1; | |
497c9a19 YL |
1481 | return 0; |
1482 | } | |
1483 | ||
1484 | static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq, | |
54168ed7 | 1485 | int trigger, int polarity) |
497c9a19 YL |
1486 | { |
1487 | struct irq_cfg *cfg; | |
1da177e4 | 1488 | struct IO_APIC_route_entry entry; |
497c9a19 YL |
1489 | cpumask_t mask; |
1490 | ||
1491 | if (!IO_APIC_IRQ(irq)) | |
1492 | return; | |
1493 | ||
1494 | cfg = irq_cfg(irq); | |
1495 | ||
1496 | mask = TARGET_CPUS; | |
1497 | if (assign_irq_vector(irq, mask)) | |
1498 | return; | |
1499 | ||
1500 | cpus_and(mask, cfg->domain, mask); | |
1501 | ||
1502 | apic_printk(APIC_VERBOSE,KERN_DEBUG | |
1503 | "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> " | |
1504 | "IRQ %d Mode:%i Active:%i)\n", | |
1505 | apic, mp_ioapics[apic].mp_apicid, pin, cfg->vector, | |
1506 | irq, trigger, polarity); | |
1507 | ||
1508 | ||
1509 | if (setup_ioapic_entry(mp_ioapics[apic].mp_apicid, irq, &entry, | |
1510 | cpu_mask_to_apicid(mask), trigger, polarity, | |
1511 | cfg->vector)) { | |
1512 | printk("Failed to setup ioapic entry for ioapic %d, pin %d\n", | |
1513 | mp_ioapics[apic].mp_apicid, pin); | |
1514 | __clear_irq_vector(irq); | |
1515 | return; | |
1516 | } | |
1517 | ||
1518 | ioapic_register_intr(irq, trigger); | |
1519 | if (irq < 16) | |
1520 | disable_8259A_irq(irq); | |
1521 | ||
1522 | ioapic_write_entry(apic, pin, entry); | |
1523 | } | |
1524 | ||
1525 | static void __init setup_IO_APIC_irqs(void) | |
1526 | { | |
1527 | int apic, pin, idx, irq, first_notcon = 1; | |
1da177e4 LT |
1528 | |
1529 | apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n"); | |
1530 | ||
1531 | for (apic = 0; apic < nr_ioapics; apic++) { | |
1532 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { | |
1533 | ||
497c9a19 | 1534 | idx = find_irq_entry(apic,pin,mp_INT); |
1da177e4 LT |
1535 | if (idx == -1) { |
1536 | if (first_notcon) { | |
497c9a19 | 1537 | apic_printk(APIC_VERBOSE, KERN_DEBUG " IO-APIC (apicid-pin) %d-%d", mp_ioapics[apic].mp_apicid, pin); |
1da177e4 LT |
1538 | first_notcon = 0; |
1539 | } else | |
497c9a19 | 1540 | apic_printk(APIC_VERBOSE, ", %d-%d", mp_ioapics[apic].mp_apicid, pin); |
1da177e4 LT |
1541 | continue; |
1542 | } | |
20d225b9 YL |
1543 | if (!first_notcon) { |
1544 | apic_printk(APIC_VERBOSE, " not connected.\n"); | |
1545 | first_notcon = 1; | |
1546 | } | |
1547 | ||
1da177e4 | 1548 | irq = pin_2_irq(idx, apic, pin); |
54168ed7 | 1549 | #ifdef CONFIG_X86_32 |
497c9a19 YL |
1550 | if (multi_timer_check(apic, irq)) |
1551 | continue; | |
54168ed7 | 1552 | #endif |
497c9a19 | 1553 | add_pin_to_irq(irq, apic, pin); |
36062448 | 1554 | |
497c9a19 YL |
1555 | setup_IO_APIC_irq(apic, pin, irq, |
1556 | irq_trigger(idx), irq_polarity(idx)); | |
1da177e4 LT |
1557 | } |
1558 | } | |
1559 | ||
1560 | if (!first_notcon) | |
1561 | apic_printk(APIC_VERBOSE, " not connected.\n"); | |
1562 | } | |
1563 | ||
1564 | /* | |
f7633ce5 | 1565 | * Set up the timer pin, possibly with the 8259A-master behind. |
1da177e4 | 1566 | */ |
f7633ce5 MR |
1567 | static void __init setup_timer_IRQ0_pin(unsigned int apic, unsigned int pin, |
1568 | int vector) | |
1da177e4 LT |
1569 | { |
1570 | struct IO_APIC_route_entry entry; | |
1da177e4 | 1571 | |
54168ed7 IM |
1572 | #ifdef CONFIG_INTR_REMAP |
1573 | if (intr_remapping_enabled) | |
1574 | return; | |
1575 | #endif | |
1576 | ||
36062448 | 1577 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
1578 | |
1579 | /* | |
1580 | * We use logical delivery to get the timer IRQ | |
1581 | * to the first CPU. | |
1582 | */ | |
1583 | entry.dest_mode = INT_DEST_MODE; | |
03be7505 | 1584 | entry.mask = 1; /* mask IRQ now */ |
d83e94ac | 1585 | entry.dest = cpu_mask_to_apicid(TARGET_CPUS); |
1da177e4 LT |
1586 | entry.delivery_mode = INT_DELIVERY_MODE; |
1587 | entry.polarity = 0; | |
1588 | entry.trigger = 0; | |
1589 | entry.vector = vector; | |
1590 | ||
1591 | /* | |
1592 | * The timer IRQ doesn't have to know that behind the | |
f7633ce5 | 1593 | * scene we may have a 8259A-master in AEOI mode ... |
1da177e4 | 1594 | */ |
54168ed7 | 1595 | set_irq_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, "edge"); |
1da177e4 LT |
1596 | |
1597 | /* | |
1598 | * Add it to the IO-APIC irq-routing table: | |
1599 | */ | |
cf4c6a2f | 1600 | ioapic_write_entry(apic, pin, entry); |
1da177e4 LT |
1601 | } |
1602 | ||
32f71aff MR |
1603 | |
1604 | __apicdebuginit(void) print_IO_APIC(void) | |
1da177e4 LT |
1605 | { |
1606 | int apic, i; | |
1607 | union IO_APIC_reg_00 reg_00; | |
1608 | union IO_APIC_reg_01 reg_01; | |
1609 | union IO_APIC_reg_02 reg_02; | |
1610 | union IO_APIC_reg_03 reg_03; | |
1611 | unsigned long flags; | |
0f978f45 | 1612 | struct irq_cfg *cfg; |
1da177e4 LT |
1613 | |
1614 | if (apic_verbosity == APIC_QUIET) | |
1615 | return; | |
1616 | ||
36062448 | 1617 | printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries); |
1da177e4 LT |
1618 | for (i = 0; i < nr_ioapics; i++) |
1619 | printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n", | |
ec2cd0a2 | 1620 | mp_ioapics[i].mp_apicid, nr_ioapic_registers[i]); |
1da177e4 LT |
1621 | |
1622 | /* | |
1623 | * We are a bit conservative about what we expect. We have to | |
1624 | * know about every hardware change ASAP. | |
1625 | */ | |
1626 | printk(KERN_INFO "testing the IO APIC.......................\n"); | |
1627 | ||
1628 | for (apic = 0; apic < nr_ioapics; apic++) { | |
1629 | ||
1630 | spin_lock_irqsave(&ioapic_lock, flags); | |
1631 | reg_00.raw = io_apic_read(apic, 0); | |
1632 | reg_01.raw = io_apic_read(apic, 1); | |
1633 | if (reg_01.bits.version >= 0x10) | |
1634 | reg_02.raw = io_apic_read(apic, 2); | |
54168ed7 IM |
1635 | if (reg_01.bits.version >= 0x20) |
1636 | reg_03.raw = io_apic_read(apic, 3); | |
1da177e4 LT |
1637 | spin_unlock_irqrestore(&ioapic_lock, flags); |
1638 | ||
54168ed7 | 1639 | printk("\n"); |
ec2cd0a2 | 1640 | printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mp_apicid); |
1da177e4 LT |
1641 | printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw); |
1642 | printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID); | |
1643 | printk(KERN_DEBUG "....... : Delivery Type: %X\n", reg_00.bits.delivery_type); | |
1644 | printk(KERN_DEBUG "....... : LTS : %X\n", reg_00.bits.LTS); | |
1da177e4 | 1645 | |
54168ed7 | 1646 | printk(KERN_DEBUG ".... register #01: %08X\n", *(int *)®_01); |
1da177e4 | 1647 | printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries); |
1da177e4 LT |
1648 | |
1649 | printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ); | |
1650 | printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version); | |
1da177e4 LT |
1651 | |
1652 | /* | |
1653 | * Some Intel chipsets with IO APIC VERSION of 0x1? don't have reg_02, | |
1654 | * but the value of reg_02 is read as the previous read register | |
1655 | * value, so ignore it if reg_02 == reg_01. | |
1656 | */ | |
1657 | if (reg_01.bits.version >= 0x10 && reg_02.raw != reg_01.raw) { | |
1658 | printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw); | |
1659 | printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration); | |
1da177e4 LT |
1660 | } |
1661 | ||
1662 | /* | |
1663 | * Some Intel chipsets with IO APIC VERSION of 0x2? don't have reg_02 | |
1664 | * or reg_03, but the value of reg_0[23] is read as the previous read | |
1665 | * register value, so ignore it if reg_03 == reg_0[12]. | |
1666 | */ | |
1667 | if (reg_01.bits.version >= 0x20 && reg_03.raw != reg_02.raw && | |
1668 | reg_03.raw != reg_01.raw) { | |
1669 | printk(KERN_DEBUG ".... register #03: %08X\n", reg_03.raw); | |
1670 | printk(KERN_DEBUG "....... : Boot DT : %X\n", reg_03.bits.boot_DT); | |
1da177e4 LT |
1671 | } |
1672 | ||
1673 | printk(KERN_DEBUG ".... IRQ redirection table:\n"); | |
1674 | ||
d83e94ac YL |
1675 | printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol" |
1676 | " Stat Dmod Deli Vect: \n"); | |
1da177e4 LT |
1677 | |
1678 | for (i = 0; i <= reg_01.bits.entries; i++) { | |
1679 | struct IO_APIC_route_entry entry; | |
1680 | ||
cf4c6a2f | 1681 | entry = ioapic_read_entry(apic, i); |
1da177e4 | 1682 | |
54168ed7 IM |
1683 | printk(KERN_DEBUG " %02x %03X ", |
1684 | i, | |
1685 | entry.dest | |
1686 | ); | |
1da177e4 LT |
1687 | |
1688 | printk("%1d %1d %1d %1d %1d %1d %1d %02X\n", | |
1689 | entry.mask, | |
1690 | entry.trigger, | |
1691 | entry.irr, | |
1692 | entry.polarity, | |
1693 | entry.delivery_status, | |
1694 | entry.dest_mode, | |
1695 | entry.delivery_mode, | |
1696 | entry.vector | |
1697 | ); | |
1698 | } | |
1699 | } | |
1da177e4 | 1700 | printk(KERN_DEBUG "IRQ to pin mappings:\n"); |
0f978f45 YL |
1701 | for_each_irq_cfg(cfg) { |
1702 | struct irq_pin_list *entry = cfg->irq_2_pin; | |
1703 | if (!entry) | |
1da177e4 | 1704 | continue; |
54168ed7 | 1705 | printk(KERN_DEBUG "IRQ%d ", cfg->irq); |
1da177e4 LT |
1706 | for (;;) { |
1707 | printk("-> %d:%d", entry->apic, entry->pin); | |
1708 | if (!entry->next) | |
1709 | break; | |
0f978f45 | 1710 | entry = entry->next; |
1da177e4 LT |
1711 | } |
1712 | printk("\n"); | |
1713 | } | |
1714 | ||
1715 | printk(KERN_INFO ".................................... done.\n"); | |
1716 | ||
1717 | return; | |
1718 | } | |
1719 | ||
32f71aff | 1720 | __apicdebuginit(void) print_APIC_bitfield(int base) |
1da177e4 LT |
1721 | { |
1722 | unsigned int v; | |
1723 | int i, j; | |
1724 | ||
1725 | if (apic_verbosity == APIC_QUIET) | |
1726 | return; | |
1727 | ||
1728 | printk(KERN_DEBUG "0123456789abcdef0123456789abcdef\n" KERN_DEBUG); | |
1729 | for (i = 0; i < 8; i++) { | |
1730 | v = apic_read(base + i*0x10); | |
1731 | for (j = 0; j < 32; j++) { | |
1732 | if (v & (1<<j)) | |
1733 | printk("1"); | |
1734 | else | |
1735 | printk("0"); | |
1736 | } | |
1737 | printk("\n"); | |
1738 | } | |
1739 | } | |
1740 | ||
32f71aff | 1741 | __apicdebuginit(void) print_local_APIC(void *dummy) |
1da177e4 LT |
1742 | { |
1743 | unsigned int v, ver, maxlvt; | |
7ab6af7a | 1744 | u64 icr; |
1da177e4 LT |
1745 | |
1746 | if (apic_verbosity == APIC_QUIET) | |
1747 | return; | |
1748 | ||
1749 | printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n", | |
1750 | smp_processor_id(), hard_smp_processor_id()); | |
66823114 | 1751 | v = apic_read(APIC_ID); |
54168ed7 | 1752 | printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, read_apic_id()); |
1da177e4 LT |
1753 | v = apic_read(APIC_LVR); |
1754 | printk(KERN_INFO "... APIC VERSION: %08x\n", v); | |
1755 | ver = GET_APIC_VERSION(v); | |
e05d723f | 1756 | maxlvt = lapic_get_maxlvt(); |
1da177e4 LT |
1757 | |
1758 | v = apic_read(APIC_TASKPRI); | |
1759 | printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK); | |
1760 | ||
54168ed7 | 1761 | if (APIC_INTEGRATED(ver)) { /* !82489DX */ |
1da177e4 LT |
1762 | v = apic_read(APIC_ARBPRI); |
1763 | printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v, | |
1764 | v & APIC_ARBPRI_MASK); | |
1765 | v = apic_read(APIC_PROCPRI); | |
1766 | printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v); | |
1767 | } | |
1768 | ||
1769 | v = apic_read(APIC_EOI); | |
1770 | printk(KERN_DEBUG "... APIC EOI: %08x\n", v); | |
1771 | v = apic_read(APIC_RRR); | |
1772 | printk(KERN_DEBUG "... APIC RRR: %08x\n", v); | |
1773 | v = apic_read(APIC_LDR); | |
1774 | printk(KERN_DEBUG "... APIC LDR: %08x\n", v); | |
1775 | v = apic_read(APIC_DFR); | |
1776 | printk(KERN_DEBUG "... APIC DFR: %08x\n", v); | |
1777 | v = apic_read(APIC_SPIV); | |
1778 | printk(KERN_DEBUG "... APIC SPIV: %08x\n", v); | |
1779 | ||
1780 | printk(KERN_DEBUG "... APIC ISR field:\n"); | |
1781 | print_APIC_bitfield(APIC_ISR); | |
1782 | printk(KERN_DEBUG "... APIC TMR field:\n"); | |
1783 | print_APIC_bitfield(APIC_TMR); | |
1784 | printk(KERN_DEBUG "... APIC IRR field:\n"); | |
1785 | print_APIC_bitfield(APIC_IRR); | |
1786 | ||
54168ed7 IM |
1787 | if (APIC_INTEGRATED(ver)) { /* !82489DX */ |
1788 | if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ | |
1da177e4 | 1789 | apic_write(APIC_ESR, 0); |
54168ed7 | 1790 | |
1da177e4 LT |
1791 | v = apic_read(APIC_ESR); |
1792 | printk(KERN_DEBUG "... APIC ESR: %08x\n", v); | |
1793 | } | |
1794 | ||
7ab6af7a HS |
1795 | icr = apic_icr_read(); |
1796 | printk(KERN_DEBUG "... APIC ICR: %08x\n", icr); | |
1797 | printk(KERN_DEBUG "... APIC ICR2: %08x\n", icr >> 32); | |
1da177e4 LT |
1798 | |
1799 | v = apic_read(APIC_LVTT); | |
1800 | printk(KERN_DEBUG "... APIC LVTT: %08x\n", v); | |
1801 | ||
1802 | if (maxlvt > 3) { /* PC is LVT#4. */ | |
1803 | v = apic_read(APIC_LVTPC); | |
1804 | printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v); | |
1805 | } | |
1806 | v = apic_read(APIC_LVT0); | |
1807 | printk(KERN_DEBUG "... APIC LVT0: %08x\n", v); | |
1808 | v = apic_read(APIC_LVT1); | |
1809 | printk(KERN_DEBUG "... APIC LVT1: %08x\n", v); | |
1810 | ||
1811 | if (maxlvt > 2) { /* ERR is LVT#3. */ | |
1812 | v = apic_read(APIC_LVTERR); | |
1813 | printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v); | |
1814 | } | |
1815 | ||
1816 | v = apic_read(APIC_TMICT); | |
1817 | printk(KERN_DEBUG "... APIC TMICT: %08x\n", v); | |
1818 | v = apic_read(APIC_TMCCT); | |
1819 | printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v); | |
1820 | v = apic_read(APIC_TDCR); | |
1821 | printk(KERN_DEBUG "... APIC TDCR: %08x\n", v); | |
1822 | printk("\n"); | |
1823 | } | |
1824 | ||
32f71aff | 1825 | __apicdebuginit(void) print_all_local_APICs(void) |
1da177e4 | 1826 | { |
15c8b6c1 | 1827 | on_each_cpu(print_local_APIC, NULL, 1); |
1da177e4 LT |
1828 | } |
1829 | ||
32f71aff | 1830 | __apicdebuginit(void) print_PIC(void) |
1da177e4 | 1831 | { |
1da177e4 LT |
1832 | unsigned int v; |
1833 | unsigned long flags; | |
1834 | ||
1835 | if (apic_verbosity == APIC_QUIET) | |
1836 | return; | |
1837 | ||
1838 | printk(KERN_DEBUG "\nprinting PIC contents\n"); | |
1839 | ||
1840 | spin_lock_irqsave(&i8259A_lock, flags); | |
1841 | ||
1842 | v = inb(0xa1) << 8 | inb(0x21); | |
1843 | printk(KERN_DEBUG "... PIC IMR: %04x\n", v); | |
1844 | ||
1845 | v = inb(0xa0) << 8 | inb(0x20); | |
1846 | printk(KERN_DEBUG "... PIC IRR: %04x\n", v); | |
1847 | ||
54168ed7 IM |
1848 | outb(0x0b,0xa0); |
1849 | outb(0x0b,0x20); | |
1da177e4 | 1850 | v = inb(0xa0) << 8 | inb(0x20); |
54168ed7 IM |
1851 | outb(0x0a,0xa0); |
1852 | outb(0x0a,0x20); | |
1da177e4 LT |
1853 | |
1854 | spin_unlock_irqrestore(&i8259A_lock, flags); | |
1855 | ||
1856 | printk(KERN_DEBUG "... PIC ISR: %04x\n", v); | |
1857 | ||
1858 | v = inb(0x4d1) << 8 | inb(0x4d0); | |
1859 | printk(KERN_DEBUG "... PIC ELCR: %04x\n", v); | |
1860 | } | |
1861 | ||
32f71aff MR |
1862 | __apicdebuginit(int) print_all_ICs(void) |
1863 | { | |
1864 | print_PIC(); | |
1865 | print_all_local_APICs(); | |
1866 | print_IO_APIC(); | |
1867 | ||
1868 | return 0; | |
1869 | } | |
1870 | ||
1871 | fs_initcall(print_all_ICs); | |
1872 | ||
1da177e4 | 1873 | |
efa2559f YL |
1874 | /* Where if anywhere is the i8259 connect in external int mode */ |
1875 | static struct { int pin, apic; } ioapic_i8259 = { -1, -1 }; | |
1876 | ||
54168ed7 | 1877 | void __init enable_IO_APIC(void) |
1da177e4 LT |
1878 | { |
1879 | union IO_APIC_reg_01 reg_01; | |
fcfd636a | 1880 | int i8259_apic, i8259_pin; |
54168ed7 | 1881 | int apic; |
1da177e4 LT |
1882 | unsigned long flags; |
1883 | ||
54168ed7 IM |
1884 | #ifdef CONFIG_X86_32 |
1885 | int i; | |
1da177e4 LT |
1886 | if (!pirqs_enabled) |
1887 | for (i = 0; i < MAX_PIRQS; i++) | |
1888 | pirq_entries[i] = -1; | |
54168ed7 | 1889 | #endif |
1da177e4 LT |
1890 | |
1891 | /* | |
1892 | * The number of IO-APIC IRQ registers (== #pins): | |
1893 | */ | |
fcfd636a | 1894 | for (apic = 0; apic < nr_ioapics; apic++) { |
1da177e4 | 1895 | spin_lock_irqsave(&ioapic_lock, flags); |
fcfd636a | 1896 | reg_01.raw = io_apic_read(apic, 1); |
1da177e4 | 1897 | spin_unlock_irqrestore(&ioapic_lock, flags); |
fcfd636a EB |
1898 | nr_ioapic_registers[apic] = reg_01.bits.entries+1; |
1899 | } | |
54168ed7 | 1900 | for(apic = 0; apic < nr_ioapics; apic++) { |
fcfd636a EB |
1901 | int pin; |
1902 | /* See if any of the pins is in ExtINT mode */ | |
1008fddc | 1903 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { |
fcfd636a | 1904 | struct IO_APIC_route_entry entry; |
cf4c6a2f | 1905 | entry = ioapic_read_entry(apic, pin); |
fcfd636a | 1906 | |
fcfd636a EB |
1907 | /* If the interrupt line is enabled and in ExtInt mode |
1908 | * I have found the pin where the i8259 is connected. | |
1909 | */ | |
1910 | if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) { | |
1911 | ioapic_i8259.apic = apic; | |
1912 | ioapic_i8259.pin = pin; | |
1913 | goto found_i8259; | |
1914 | } | |
1915 | } | |
1916 | } | |
1917 | found_i8259: | |
1918 | /* Look to see what if the MP table has reported the ExtINT */ | |
1919 | /* If we could not find the appropriate pin by looking at the ioapic | |
1920 | * the i8259 probably is not connected the ioapic but give the | |
1921 | * mptable a chance anyway. | |
1922 | */ | |
1923 | i8259_pin = find_isa_irq_pin(0, mp_ExtINT); | |
1924 | i8259_apic = find_isa_irq_apic(0, mp_ExtINT); | |
1925 | /* Trust the MP table if nothing is setup in the hardware */ | |
1926 | if ((ioapic_i8259.pin == -1) && (i8259_pin >= 0)) { | |
1927 | printk(KERN_WARNING "ExtINT not setup in hardware but reported by MP table\n"); | |
1928 | ioapic_i8259.pin = i8259_pin; | |
1929 | ioapic_i8259.apic = i8259_apic; | |
1930 | } | |
1931 | /* Complain if the MP table and the hardware disagree */ | |
1932 | if (((ioapic_i8259.apic != i8259_apic) || (ioapic_i8259.pin != i8259_pin)) && | |
1933 | (i8259_pin >= 0) && (ioapic_i8259.pin >= 0)) | |
1934 | { | |
1935 | printk(KERN_WARNING "ExtINT in hardware and MP table differ\n"); | |
1da177e4 LT |
1936 | } |
1937 | ||
1938 | /* | |
1939 | * Do not trust the IO-APIC being empty at bootup | |
1940 | */ | |
1941 | clear_IO_APIC(); | |
1942 | } | |
1943 | ||
1944 | /* | |
1945 | * Not an __init, needed by the reboot code | |
1946 | */ | |
1947 | void disable_IO_APIC(void) | |
1948 | { | |
1949 | /* | |
1950 | * Clear the IO-APIC before rebooting: | |
1951 | */ | |
1952 | clear_IO_APIC(); | |
1953 | ||
650927ef | 1954 | /* |
0b968d23 | 1955 | * If the i8259 is routed through an IOAPIC |
650927ef | 1956 | * Put that IOAPIC in virtual wire mode |
0b968d23 | 1957 | * so legacy interrupts can be delivered. |
650927ef | 1958 | */ |
fcfd636a | 1959 | if (ioapic_i8259.pin != -1) { |
650927ef | 1960 | struct IO_APIC_route_entry entry; |
650927ef EB |
1961 | |
1962 | memset(&entry, 0, sizeof(entry)); | |
1963 | entry.mask = 0; /* Enabled */ | |
1964 | entry.trigger = 0; /* Edge */ | |
1965 | entry.irr = 0; | |
1966 | entry.polarity = 0; /* High */ | |
1967 | entry.delivery_status = 0; | |
1968 | entry.dest_mode = 0; /* Physical */ | |
fcfd636a | 1969 | entry.delivery_mode = dest_ExtINT; /* ExtInt */ |
650927ef | 1970 | entry.vector = 0; |
54168ed7 | 1971 | entry.dest = read_apic_id(); |
650927ef EB |
1972 | |
1973 | /* | |
1974 | * Add it to the IO-APIC irq-routing table: | |
1975 | */ | |
cf4c6a2f | 1976 | ioapic_write_entry(ioapic_i8259.apic, ioapic_i8259.pin, entry); |
650927ef | 1977 | } |
54168ed7 | 1978 | |
fcfd636a | 1979 | disconnect_bsp_APIC(ioapic_i8259.pin != -1); |
1da177e4 LT |
1980 | } |
1981 | ||
54168ed7 | 1982 | #ifdef CONFIG_X86_32 |
1da177e4 LT |
1983 | /* |
1984 | * function to set the IO-APIC physical IDs based on the | |
1985 | * values stored in the MPC table. | |
1986 | * | |
1987 | * by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999 | |
1988 | */ | |
1989 | ||
1da177e4 LT |
1990 | static void __init setup_ioapic_ids_from_mpc(void) |
1991 | { | |
1992 | union IO_APIC_reg_00 reg_00; | |
1993 | physid_mask_t phys_id_present_map; | |
1994 | int apic; | |
1995 | int i; | |
1996 | unsigned char old_id; | |
1997 | unsigned long flags; | |
1998 | ||
a4dbc34d | 1999 | if (x86_quirks->setup_ioapic_ids && x86_quirks->setup_ioapic_ids()) |
d49c4288 | 2000 | return; |
d49c4288 | 2001 | |
ca05fea6 NP |
2002 | /* |
2003 | * Don't check I/O APIC IDs for xAPIC systems. They have | |
2004 | * no meaning without the serial APIC bus. | |
2005 | */ | |
7c5c1e42 SL |
2006 | if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) |
2007 | || APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) | |
ca05fea6 | 2008 | return; |
1da177e4 LT |
2009 | /* |
2010 | * This is broken; anything with a real cpu count has to | |
2011 | * circumvent this idiocy regardless. | |
2012 | */ | |
2013 | phys_id_present_map = ioapic_phys_id_map(phys_cpu_present_map); | |
2014 | ||
2015 | /* | |
2016 | * Set the IOAPIC ID to the value stored in the MPC table. | |
2017 | */ | |
2018 | for (apic = 0; apic < nr_ioapics; apic++) { | |
2019 | ||
2020 | /* Read the register 0 value */ | |
2021 | spin_lock_irqsave(&ioapic_lock, flags); | |
2022 | reg_00.raw = io_apic_read(apic, 0); | |
2023 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
36062448 | 2024 | |
ec2cd0a2 | 2025 | old_id = mp_ioapics[apic].mp_apicid; |
1da177e4 | 2026 | |
ec2cd0a2 | 2027 | if (mp_ioapics[apic].mp_apicid >= get_physical_broadcast()) { |
1da177e4 | 2028 | printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n", |
ec2cd0a2 | 2029 | apic, mp_ioapics[apic].mp_apicid); |
1da177e4 LT |
2030 | printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n", |
2031 | reg_00.bits.ID); | |
ec2cd0a2 | 2032 | mp_ioapics[apic].mp_apicid = reg_00.bits.ID; |
1da177e4 LT |
2033 | } |
2034 | ||
1da177e4 LT |
2035 | /* |
2036 | * Sanity check, is the ID really free? Every APIC in a | |
2037 | * system must have a unique ID or we get lots of nice | |
2038 | * 'stuck on smp_invalidate_needed IPI wait' messages. | |
2039 | */ | |
2040 | if (check_apicid_used(phys_id_present_map, | |
ec2cd0a2 | 2041 | mp_ioapics[apic].mp_apicid)) { |
1da177e4 | 2042 | printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n", |
ec2cd0a2 | 2043 | apic, mp_ioapics[apic].mp_apicid); |
1da177e4 LT |
2044 | for (i = 0; i < get_physical_broadcast(); i++) |
2045 | if (!physid_isset(i, phys_id_present_map)) | |
2046 | break; | |
2047 | if (i >= get_physical_broadcast()) | |
2048 | panic("Max APIC ID exceeded!\n"); | |
2049 | printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n", | |
2050 | i); | |
2051 | physid_set(i, phys_id_present_map); | |
ec2cd0a2 | 2052 | mp_ioapics[apic].mp_apicid = i; |
1da177e4 LT |
2053 | } else { |
2054 | physid_mask_t tmp; | |
ec2cd0a2 | 2055 | tmp = apicid_to_cpu_present(mp_ioapics[apic].mp_apicid); |
1da177e4 LT |
2056 | apic_printk(APIC_VERBOSE, "Setting %d in the " |
2057 | "phys_id_present_map\n", | |
ec2cd0a2 | 2058 | mp_ioapics[apic].mp_apicid); |
1da177e4 LT |
2059 | physids_or(phys_id_present_map, phys_id_present_map, tmp); |
2060 | } | |
2061 | ||
2062 | ||
2063 | /* | |
2064 | * We need to adjust the IRQ routing table | |
2065 | * if the ID changed. | |
2066 | */ | |
ec2cd0a2 | 2067 | if (old_id != mp_ioapics[apic].mp_apicid) |
1da177e4 | 2068 | for (i = 0; i < mp_irq_entries; i++) |
2fddb6e2 AS |
2069 | if (mp_irqs[i].mp_dstapic == old_id) |
2070 | mp_irqs[i].mp_dstapic | |
ec2cd0a2 | 2071 | = mp_ioapics[apic].mp_apicid; |
1da177e4 LT |
2072 | |
2073 | /* | |
2074 | * Read the right value from the MPC table and | |
2075 | * write it into the ID register. | |
36062448 | 2076 | */ |
1da177e4 LT |
2077 | apic_printk(APIC_VERBOSE, KERN_INFO |
2078 | "...changing IO-APIC physical APIC ID to %d ...", | |
ec2cd0a2 | 2079 | mp_ioapics[apic].mp_apicid); |
1da177e4 | 2080 | |
ec2cd0a2 | 2081 | reg_00.bits.ID = mp_ioapics[apic].mp_apicid; |
1da177e4 | 2082 | spin_lock_irqsave(&ioapic_lock, flags); |
1da177e4 LT |
2083 | |
2084 | /* | |
2085 | * Sanity check | |
2086 | */ | |
2087 | spin_lock_irqsave(&ioapic_lock, flags); | |
2088 | reg_00.raw = io_apic_read(apic, 0); | |
2089 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
ec2cd0a2 | 2090 | if (reg_00.bits.ID != mp_ioapics[apic].mp_apicid) |
1da177e4 LT |
2091 | printk("could not set ID!\n"); |
2092 | else | |
2093 | apic_printk(APIC_VERBOSE, " ok.\n"); | |
2094 | } | |
2095 | } | |
54168ed7 | 2096 | #endif |
1da177e4 | 2097 | |
7ce0bcfd | 2098 | int no_timer_check __initdata; |
8542b200 ZA |
2099 | |
2100 | static int __init notimercheck(char *s) | |
2101 | { | |
2102 | no_timer_check = 1; | |
2103 | return 1; | |
2104 | } | |
2105 | __setup("no_timer_check", notimercheck); | |
2106 | ||
1da177e4 LT |
2107 | /* |
2108 | * There is a nasty bug in some older SMP boards, their mptable lies | |
2109 | * about the timer IRQ. We do the following to work around the situation: | |
2110 | * | |
2111 | * - timer IRQ defaults to IO-APIC IRQ | |
2112 | * - if this function detects that timer IRQs are defunct, then we fall | |
2113 | * back to ISA timer IRQs | |
2114 | */ | |
f0a7a5c9 | 2115 | static int __init timer_irq_works(void) |
1da177e4 LT |
2116 | { |
2117 | unsigned long t1 = jiffies; | |
4aae0702 | 2118 | unsigned long flags; |
1da177e4 | 2119 | |
8542b200 ZA |
2120 | if (no_timer_check) |
2121 | return 1; | |
2122 | ||
4aae0702 | 2123 | local_save_flags(flags); |
1da177e4 LT |
2124 | local_irq_enable(); |
2125 | /* Let ten ticks pass... */ | |
2126 | mdelay((10 * 1000) / HZ); | |
4aae0702 | 2127 | local_irq_restore(flags); |
1da177e4 LT |
2128 | |
2129 | /* | |
2130 | * Expect a few ticks at least, to be sure some possible | |
2131 | * glue logic does not lock up after one or two first | |
2132 | * ticks in a non-ExtINT mode. Also the local APIC | |
2133 | * might have cached one ExtINT interrupt. Finally, at | |
2134 | * least one tick may be lost due to delays. | |
2135 | */ | |
54168ed7 IM |
2136 | |
2137 | /* jiffies wrap? */ | |
1d16b53e | 2138 | if (time_after(jiffies, t1 + 4)) |
1da177e4 | 2139 | return 1; |
1da177e4 LT |
2140 | return 0; |
2141 | } | |
2142 | ||
2143 | /* | |
2144 | * In the SMP+IOAPIC case it might happen that there are an unspecified | |
2145 | * number of pending IRQ events unhandled. These cases are very rare, | |
2146 | * so we 'resend' these IRQs via IPIs, to the same CPU. It's much | |
2147 | * better to do it this way as thus we do not have to be aware of | |
2148 | * 'pending' interrupts in the IRQ path, except at this point. | |
2149 | */ | |
2150 | /* | |
2151 | * Edge triggered needs to resend any interrupt | |
2152 | * that was delayed but this is now handled in the device | |
2153 | * independent code. | |
2154 | */ | |
2155 | ||
2156 | /* | |
2157 | * Starting up a edge-triggered IO-APIC interrupt is | |
2158 | * nasty - we need to make sure that we get the edge. | |
2159 | * If it is already asserted for some reason, we need | |
2160 | * return 1 to indicate that is was pending. | |
2161 | * | |
2162 | * This is not complete - we should be able to fake | |
2163 | * an edge even if it isn't on the 8259A... | |
2164 | */ | |
54168ed7 | 2165 | |
f5b9ed7a | 2166 | static unsigned int startup_ioapic_irq(unsigned int irq) |
1da177e4 LT |
2167 | { |
2168 | int was_pending = 0; | |
2169 | unsigned long flags; | |
2170 | ||
2171 | spin_lock_irqsave(&ioapic_lock, flags); | |
2172 | if (irq < 16) { | |
2173 | disable_8259A_irq(irq); | |
2174 | if (i8259A_irq_pending(irq)) | |
2175 | was_pending = 1; | |
2176 | } | |
2177 | __unmask_IO_APIC_irq(irq); | |
2178 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
2179 | ||
2180 | return was_pending; | |
2181 | } | |
2182 | ||
54168ed7 | 2183 | #ifdef CONFIG_X86_64 |
ace80ab7 | 2184 | static int ioapic_retrigger_irq(unsigned int irq) |
1da177e4 | 2185 | { |
54168ed7 IM |
2186 | |
2187 | struct irq_cfg *cfg = irq_cfg(irq); | |
2188 | unsigned long flags; | |
2189 | ||
2190 | spin_lock_irqsave(&vector_lock, flags); | |
2191 | send_IPI_mask(cpumask_of_cpu(first_cpu(cfg->domain)), cfg->vector); | |
2192 | spin_unlock_irqrestore(&vector_lock, flags); | |
c0ad90a3 IM |
2193 | |
2194 | return 1; | |
2195 | } | |
54168ed7 IM |
2196 | #else |
2197 | static int ioapic_retrigger_irq(unsigned int irq) | |
497c9a19 | 2198 | { |
54168ed7 | 2199 | send_IPI_self(irq_cfg(irq)->vector); |
497c9a19 | 2200 | |
54168ed7 IM |
2201 | return 1; |
2202 | } | |
2203 | #endif | |
497c9a19 | 2204 | |
54168ed7 IM |
2205 | /* |
2206 | * Level and edge triggered IO-APIC interrupts need different handling, | |
2207 | * so we use two separate IRQ descriptors. Edge triggered IRQs can be | |
2208 | * handled with the level-triggered descriptor, but that one has slightly | |
2209 | * more overhead. Level-triggered interrupts cannot be handled with the | |
2210 | * edge-triggered handler, without risking IRQ storms and other ugly | |
2211 | * races. | |
2212 | */ | |
497c9a19 | 2213 | |
54168ed7 | 2214 | #ifdef CONFIG_SMP |
497c9a19 | 2215 | |
54168ed7 IM |
2216 | #ifdef CONFIG_INTR_REMAP |
2217 | static void ir_irq_migration(struct work_struct *work); | |
497c9a19 | 2218 | |
54168ed7 | 2219 | static DECLARE_DELAYED_WORK(ir_migration_work, ir_irq_migration); |
497c9a19 | 2220 | |
54168ed7 IM |
2221 | /* |
2222 | * Migrate the IO-APIC irq in the presence of intr-remapping. | |
2223 | * | |
2224 | * For edge triggered, irq migration is a simple atomic update(of vector | |
2225 | * and cpu destination) of IRTE and flush the hardware cache. | |
2226 | * | |
2227 | * For level triggered, we need to modify the io-apic RTE aswell with the update | |
2228 | * vector information, along with modifying IRTE with vector and destination. | |
2229 | * So irq migration for level triggered is little bit more complex compared to | |
2230 | * edge triggered migration. But the good news is, we use the same algorithm | |
2231 | * for level triggered migration as we have today, only difference being, | |
2232 | * we now initiate the irq migration from process context instead of the | |
2233 | * interrupt context. | |
2234 | * | |
2235 | * In future, when we do a directed EOI (combined with cpu EOI broadcast | |
2236 | * suppression) to the IO-APIC, level triggered irq migration will also be | |
2237 | * as simple as edge triggered migration and we can do the irq migration | |
2238 | * with a simple atomic update to IO-APIC RTE. | |
2239 | */ | |
2240 | static void migrate_ioapic_irq(int irq, cpumask_t mask) | |
497c9a19 | 2241 | { |
54168ed7 IM |
2242 | struct irq_cfg *cfg; |
2243 | struct irq_desc *desc; | |
2244 | cpumask_t tmp, cleanup_mask; | |
2245 | struct irte irte; | |
2246 | int modify_ioapic_rte; | |
2247 | unsigned int dest; | |
2248 | unsigned long flags; | |
497c9a19 | 2249 | |
54168ed7 IM |
2250 | cpus_and(tmp, mask, cpu_online_map); |
2251 | if (cpus_empty(tmp)) | |
497c9a19 YL |
2252 | return; |
2253 | ||
54168ed7 IM |
2254 | if (get_irte(irq, &irte)) |
2255 | return; | |
497c9a19 | 2256 | |
54168ed7 IM |
2257 | if (assign_irq_vector(irq, mask)) |
2258 | return; | |
2259 | ||
2260 | cfg = irq_cfg(irq); | |
2261 | cpus_and(tmp, cfg->domain, mask); | |
2262 | dest = cpu_mask_to_apicid(tmp); | |
2263 | ||
2264 | desc = irq_to_desc(irq); | |
2265 | modify_ioapic_rte = desc->status & IRQ_LEVEL; | |
2266 | if (modify_ioapic_rte) { | |
2267 | spin_lock_irqsave(&ioapic_lock, flags); | |
2268 | __target_IO_APIC_irq(irq, dest, cfg->vector); | |
2269 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
2270 | } | |
2271 | ||
2272 | irte.vector = cfg->vector; | |
2273 | irte.dest_id = IRTE_DEST(dest); | |
2274 | ||
2275 | /* | |
2276 | * Modified the IRTE and flushes the Interrupt entry cache. | |
2277 | */ | |
2278 | modify_irte(irq, &irte); | |
2279 | ||
2280 | if (cfg->move_in_progress) { | |
2281 | cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map); | |
2282 | cfg->move_cleanup_count = cpus_weight(cleanup_mask); | |
2283 | send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); | |
2284 | cfg->move_in_progress = 0; | |
2285 | } | |
2286 | ||
2287 | desc->affinity = mask; | |
2288 | } | |
2289 | ||
2290 | static int migrate_irq_remapped_level(int irq) | |
2291 | { | |
2292 | int ret = -1; | |
2293 | struct irq_desc *desc = irq_to_desc(irq); | |
2294 | ||
2295 | mask_IO_APIC_irq(irq); | |
2296 | ||
2297 | if (io_apic_level_ack_pending(irq)) { | |
2298 | /* | |
2299 | * Interrupt in progress. Migrating irq now will change the | |
2300 | * vector information in the IO-APIC RTE and that will confuse | |
2301 | * the EOI broadcast performed by cpu. | |
2302 | * So, delay the irq migration to the next instance. | |
2303 | */ | |
2304 | schedule_delayed_work(&ir_migration_work, 1); | |
2305 | goto unmask; | |
2306 | } | |
2307 | ||
2308 | /* everthing is clear. we have right of way */ | |
2309 | migrate_ioapic_irq(irq, desc->pending_mask); | |
2310 | ||
2311 | ret = 0; | |
2312 | desc->status &= ~IRQ_MOVE_PENDING; | |
2313 | cpus_clear(desc->pending_mask); | |
2314 | ||
2315 | unmask: | |
2316 | unmask_IO_APIC_irq(irq); | |
2317 | return ret; | |
2318 | } | |
2319 | ||
2320 | static void ir_irq_migration(struct work_struct *work) | |
2321 | { | |
2322 | unsigned int irq; | |
2323 | struct irq_desc *desc; | |
2324 | ||
2325 | for_each_irq_desc(irq, desc) { | |
2326 | if (desc->status & IRQ_MOVE_PENDING) { | |
2327 | unsigned long flags; | |
2328 | ||
2329 | spin_lock_irqsave(&desc->lock, flags); | |
2330 | if (!desc->chip->set_affinity || | |
2331 | !(desc->status & IRQ_MOVE_PENDING)) { | |
2332 | desc->status &= ~IRQ_MOVE_PENDING; | |
2333 | spin_unlock_irqrestore(&desc->lock, flags); | |
2334 | continue; | |
2335 | } | |
2336 | ||
2337 | desc->chip->set_affinity(irq, desc->pending_mask); | |
2338 | spin_unlock_irqrestore(&desc->lock, flags); | |
2339 | } | |
2340 | } | |
2341 | } | |
2342 | ||
2343 | /* | |
2344 | * Migrates the IRQ destination in the process context. | |
2345 | */ | |
2346 | static void set_ir_ioapic_affinity_irq(unsigned int irq, cpumask_t mask) | |
2347 | { | |
2348 | struct irq_desc *desc = irq_to_desc(irq); | |
2349 | ||
2350 | if (desc->status & IRQ_LEVEL) { | |
2351 | desc->status |= IRQ_MOVE_PENDING; | |
2352 | desc->pending_mask = mask; | |
2353 | migrate_irq_remapped_level(irq); | |
2354 | return; | |
2355 | } | |
2356 | ||
2357 | migrate_ioapic_irq(irq, mask); | |
2358 | } | |
2359 | #endif | |
2360 | ||
2361 | asmlinkage void smp_irq_move_cleanup_interrupt(void) | |
2362 | { | |
2363 | unsigned vector, me; | |
2364 | ack_APIC_irq(); | |
2365 | #ifdef CONFIG_X86_64 | |
2366 | exit_idle(); | |
2367 | #endif | |
2368 | irq_enter(); | |
2369 | ||
2370 | me = smp_processor_id(); | |
2371 | for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { | |
2372 | unsigned int irq; | |
2373 | struct irq_desc *desc; | |
2374 | struct irq_cfg *cfg; | |
2375 | irq = __get_cpu_var(vector_irq)[vector]; | |
2376 | ||
2377 | desc = irq_to_desc(irq); | |
2378 | if (!desc) | |
2379 | continue; | |
2380 | ||
2381 | cfg = irq_cfg(irq); | |
2382 | spin_lock(&desc->lock); | |
2383 | if (!cfg->move_cleanup_count) | |
2384 | goto unlock; | |
2385 | ||
2386 | if ((vector == cfg->vector) && cpu_isset(me, cfg->domain)) | |
2387 | goto unlock; | |
2388 | ||
2389 | __get_cpu_var(vector_irq)[vector] = -1; | |
2390 | cfg->move_cleanup_count--; | |
2391 | unlock: | |
2392 | spin_unlock(&desc->lock); | |
2393 | } | |
2394 | ||
2395 | irq_exit(); | |
2396 | } | |
2397 | ||
2398 | static void irq_complete_move(unsigned int irq) | |
2399 | { | |
2400 | struct irq_cfg *cfg = irq_cfg(irq); | |
2401 | unsigned vector, me; | |
2402 | ||
2403 | if (likely(!cfg->move_in_progress)) | |
2404 | return; | |
2405 | ||
2406 | vector = ~get_irq_regs()->orig_ax; | |
2407 | me = smp_processor_id(); | |
2408 | if ((vector == cfg->vector) && cpu_isset(me, cfg->domain)) { | |
2409 | cpumask_t cleanup_mask; | |
2410 | ||
2411 | cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map); | |
2412 | cfg->move_cleanup_count = cpus_weight(cleanup_mask); | |
2413 | send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); | |
497c9a19 YL |
2414 | cfg->move_in_progress = 0; |
2415 | } | |
2416 | } | |
2417 | #else | |
2418 | static inline void irq_complete_move(unsigned int irq) {} | |
2419 | #endif | |
54168ed7 IM |
2420 | #ifdef CONFIG_INTR_REMAP |
2421 | static void ack_x2apic_level(unsigned int irq) | |
2422 | { | |
2423 | ack_x2APIC_irq(); | |
2424 | } | |
2425 | ||
2426 | static void ack_x2apic_edge(unsigned int irq) | |
2427 | { | |
2428 | ack_x2APIC_irq(); | |
2429 | } | |
2430 | #endif | |
497c9a19 | 2431 | |
1d025192 YL |
2432 | static void ack_apic_edge(unsigned int irq) |
2433 | { | |
2434 | irq_complete_move(irq); | |
2435 | move_native_irq(irq); | |
2436 | ack_APIC_irq(); | |
2437 | } | |
2438 | ||
047c8fdb YL |
2439 | #ifdef CONFIG_X86_64 |
2440 | static void ack_apic_level(unsigned int irq) | |
2441 | { | |
54168ed7 | 2442 | int do_unmask_irq = 0; |
047c8fdb | 2443 | |
54168ed7 | 2444 | irq_complete_move(irq); |
047c8fdb | 2445 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
54168ed7 IM |
2446 | /* If we are moving the irq we need to mask it */ |
2447 | if (unlikely(irq_to_desc(irq)->status & IRQ_MOVE_PENDING)) { | |
2448 | do_unmask_irq = 1; | |
2449 | mask_IO_APIC_irq(irq); | |
2450 | } | |
047c8fdb YL |
2451 | #endif |
2452 | ||
54168ed7 IM |
2453 | /* |
2454 | * We must acknowledge the irq before we move it or the acknowledge will | |
2455 | * not propagate properly. | |
2456 | */ | |
2457 | ack_APIC_irq(); | |
2458 | ||
2459 | /* Now we can move and renable the irq */ | |
2460 | if (unlikely(do_unmask_irq)) { | |
2461 | /* Only migrate the irq if the ack has been received. | |
2462 | * | |
2463 | * On rare occasions the broadcast level triggered ack gets | |
2464 | * delayed going to ioapics, and if we reprogram the | |
2465 | * vector while Remote IRR is still set the irq will never | |
2466 | * fire again. | |
2467 | * | |
2468 | * To prevent this scenario we read the Remote IRR bit | |
2469 | * of the ioapic. This has two effects. | |
2470 | * - On any sane system the read of the ioapic will | |
2471 | * flush writes (and acks) going to the ioapic from | |
2472 | * this cpu. | |
2473 | * - We get to see if the ACK has actually been delivered. | |
2474 | * | |
2475 | * Based on failed experiments of reprogramming the | |
2476 | * ioapic entry from outside of irq context starting | |
2477 | * with masking the ioapic entry and then polling until | |
2478 | * Remote IRR was clear before reprogramming the | |
2479 | * ioapic I don't trust the Remote IRR bit to be | |
2480 | * completey accurate. | |
2481 | * | |
2482 | * However there appears to be no other way to plug | |
2483 | * this race, so if the Remote IRR bit is not | |
2484 | * accurate and is causing problems then it is a hardware bug | |
2485 | * and you can go talk to the chipset vendor about it. | |
2486 | */ | |
2487 | if (!io_apic_level_ack_pending(irq)) | |
2488 | move_masked_irq(irq); | |
2489 | unmask_IO_APIC_irq(irq); | |
2490 | } | |
047c8fdb YL |
2491 | } |
2492 | #else | |
efa2559f | 2493 | atomic_t irq_mis_count; |
1d025192 YL |
2494 | static void ack_apic_level(unsigned int irq) |
2495 | { | |
2496 | unsigned long v; | |
2497 | int i; | |
2498 | ||
2499 | irq_complete_move(irq); | |
2500 | move_native_irq(irq); | |
54168ed7 IM |
2501 | /* |
2502 | * It appears there is an erratum which affects at least version 0x11 | |
2503 | * of I/O APIC (that's the 82093AA and cores integrated into various | |
2504 | * chipsets). Under certain conditions a level-triggered interrupt is | |
2505 | * erroneously delivered as edge-triggered one but the respective IRR | |
2506 | * bit gets set nevertheless. As a result the I/O unit expects an EOI | |
2507 | * message but it will never arrive and further interrupts are blocked | |
2508 | * from the source. The exact reason is so far unknown, but the | |
2509 | * phenomenon was observed when two consecutive interrupt requests | |
2510 | * from a given source get delivered to the same CPU and the source is | |
2511 | * temporarily disabled in between. | |
2512 | * | |
2513 | * A workaround is to simulate an EOI message manually. We achieve it | |
2514 | * by setting the trigger mode to edge and then to level when the edge | |
2515 | * trigger mode gets detected in the TMR of a local APIC for a | |
2516 | * level-triggered interrupt. We mask the source for the time of the | |
2517 | * operation to prevent an edge-triggered interrupt escaping meanwhile. | |
2518 | * The idea is from Manfred Spraul. --macro | |
2519 | */ | |
1d025192 YL |
2520 | i = irq_cfg(irq)->vector; |
2521 | ||
2522 | v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1)); | |
2523 | ||
2524 | ack_APIC_irq(); | |
2525 | ||
2526 | if (!(v & (1 << (i & 0x1f)))) { | |
2527 | atomic_inc(&irq_mis_count); | |
2528 | spin_lock(&ioapic_lock); | |
2529 | __mask_and_edge_IO_APIC_irq(irq); | |
2530 | __unmask_and_level_IO_APIC_irq(irq); | |
2531 | spin_unlock(&ioapic_lock); | |
2532 | } | |
2533 | } | |
047c8fdb | 2534 | #endif |
1d025192 | 2535 | |
f5b9ed7a IM |
2536 | static struct irq_chip ioapic_chip __read_mostly = { |
2537 | .name = "IO-APIC", | |
ace80ab7 EB |
2538 | .startup = startup_ioapic_irq, |
2539 | .mask = mask_IO_APIC_irq, | |
2540 | .unmask = unmask_IO_APIC_irq, | |
1d025192 YL |
2541 | .ack = ack_apic_edge, |
2542 | .eoi = ack_apic_level, | |
54d5d424 | 2543 | #ifdef CONFIG_SMP |
ace80ab7 | 2544 | .set_affinity = set_ioapic_affinity_irq, |
54d5d424 | 2545 | #endif |
ace80ab7 | 2546 | .retrigger = ioapic_retrigger_irq, |
1da177e4 LT |
2547 | }; |
2548 | ||
54168ed7 IM |
2549 | #ifdef CONFIG_INTR_REMAP |
2550 | static struct irq_chip ir_ioapic_chip __read_mostly = { | |
2551 | .name = "IR-IO-APIC", | |
2552 | .startup = startup_ioapic_irq, | |
2553 | .mask = mask_IO_APIC_irq, | |
2554 | .unmask = unmask_IO_APIC_irq, | |
2555 | .ack = ack_x2apic_edge, | |
2556 | .eoi = ack_x2apic_level, | |
2557 | #ifdef CONFIG_SMP | |
2558 | .set_affinity = set_ir_ioapic_affinity_irq, | |
2559 | #endif | |
2560 | .retrigger = ioapic_retrigger_irq, | |
2561 | }; | |
2562 | #endif | |
1da177e4 LT |
2563 | |
2564 | static inline void init_IO_APIC_traps(void) | |
2565 | { | |
2566 | int irq; | |
08678b08 | 2567 | struct irq_desc *desc; |
da51a821 | 2568 | struct irq_cfg *cfg; |
1da177e4 LT |
2569 | |
2570 | /* | |
2571 | * NOTE! The local APIC isn't very good at handling | |
2572 | * multiple interrupts at the same interrupt level. | |
2573 | * As the interrupt level is determined by taking the | |
2574 | * vector number and shifting that right by 4, we | |
2575 | * want to spread these out a bit so that they don't | |
2576 | * all fall in the same interrupt level. | |
2577 | * | |
2578 | * Also, we've got to be careful not to trash gate | |
2579 | * 0x80, because int 0x80 is hm, kind of importantish. ;) | |
2580 | */ | |
da51a821 YL |
2581 | for_each_irq_cfg(cfg) { |
2582 | irq = cfg->irq; | |
2583 | if (IO_APIC_IRQ(irq) && !cfg->vector) { | |
1da177e4 LT |
2584 | /* |
2585 | * Hmm.. We don't have an entry for this, | |
2586 | * so default to an old-fashioned 8259 | |
2587 | * interrupt if we can.. | |
2588 | */ | |
2589 | if (irq < 16) | |
2590 | make_8259A_irq(irq); | |
08678b08 YL |
2591 | else { |
2592 | desc = irq_to_desc(irq); | |
1da177e4 | 2593 | /* Strange. Oh, well.. */ |
08678b08 YL |
2594 | desc->chip = &no_irq_chip; |
2595 | } | |
1da177e4 LT |
2596 | } |
2597 | } | |
2598 | } | |
2599 | ||
f5b9ed7a IM |
2600 | /* |
2601 | * The local APIC irq-chip implementation: | |
2602 | */ | |
1da177e4 | 2603 | |
36062448 | 2604 | static void mask_lapic_irq(unsigned int irq) |
1da177e4 LT |
2605 | { |
2606 | unsigned long v; | |
2607 | ||
2608 | v = apic_read(APIC_LVT0); | |
593f4a78 | 2609 | apic_write(APIC_LVT0, v | APIC_LVT_MASKED); |
1da177e4 LT |
2610 | } |
2611 | ||
36062448 | 2612 | static void unmask_lapic_irq(unsigned int irq) |
1da177e4 | 2613 | { |
f5b9ed7a | 2614 | unsigned long v; |
1da177e4 | 2615 | |
f5b9ed7a | 2616 | v = apic_read(APIC_LVT0); |
593f4a78 | 2617 | apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED); |
f5b9ed7a | 2618 | } |
1da177e4 | 2619 | |
54168ed7 | 2620 | static void ack_lapic_irq (unsigned int irq) |
1d025192 YL |
2621 | { |
2622 | ack_APIC_irq(); | |
2623 | } | |
2624 | ||
f5b9ed7a | 2625 | static struct irq_chip lapic_chip __read_mostly = { |
9a1c6192 | 2626 | .name = "local-APIC", |
f5b9ed7a IM |
2627 | .mask = mask_lapic_irq, |
2628 | .unmask = unmask_lapic_irq, | |
c88ac1df | 2629 | .ack = ack_lapic_irq, |
1da177e4 LT |
2630 | }; |
2631 | ||
497c9a19 | 2632 | static void lapic_register_intr(int irq) |
c88ac1df | 2633 | { |
08678b08 YL |
2634 | struct irq_desc *desc; |
2635 | ||
2636 | desc = irq_to_desc(irq); | |
2637 | desc->status &= ~IRQ_LEVEL; | |
c88ac1df MR |
2638 | set_irq_chip_and_handler_name(irq, &lapic_chip, handle_edge_irq, |
2639 | "edge"); | |
c88ac1df MR |
2640 | } |
2641 | ||
e9427101 | 2642 | static void __init setup_nmi(void) |
1da177e4 LT |
2643 | { |
2644 | /* | |
36062448 | 2645 | * Dirty trick to enable the NMI watchdog ... |
1da177e4 LT |
2646 | * We put the 8259A master into AEOI mode and |
2647 | * unmask on all local APICs LVT0 as NMI. | |
2648 | * | |
2649 | * The idea to use the 8259A in AEOI mode ('8259A Virtual Wire') | |
2650 | * is from Maciej W. Rozycki - so we do not have to EOI from | |
2651 | * the NMI handler or the timer interrupt. | |
36062448 | 2652 | */ |
1da177e4 LT |
2653 | apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ..."); |
2654 | ||
e9427101 | 2655 | enable_NMI_through_LVT0(); |
1da177e4 LT |
2656 | |
2657 | apic_printk(APIC_VERBOSE, " done.\n"); | |
2658 | } | |
2659 | ||
2660 | /* | |
2661 | * This looks a bit hackish but it's about the only one way of sending | |
2662 | * a few INTA cycles to 8259As and any associated glue logic. ICR does | |
2663 | * not support the ExtINT mode, unfortunately. We need to send these | |
2664 | * cycles as some i82489DX-based boards have glue logic that keeps the | |
2665 | * 8259A interrupt line asserted until INTA. --macro | |
2666 | */ | |
28acf285 | 2667 | static inline void __init unlock_ExtINT_logic(void) |
1da177e4 | 2668 | { |
fcfd636a | 2669 | int apic, pin, i; |
1da177e4 LT |
2670 | struct IO_APIC_route_entry entry0, entry1; |
2671 | unsigned char save_control, save_freq_select; | |
1da177e4 | 2672 | |
fcfd636a | 2673 | pin = find_isa_irq_pin(8, mp_INT); |
956fb531 AB |
2674 | if (pin == -1) { |
2675 | WARN_ON_ONCE(1); | |
2676 | return; | |
2677 | } | |
fcfd636a | 2678 | apic = find_isa_irq_apic(8, mp_INT); |
956fb531 AB |
2679 | if (apic == -1) { |
2680 | WARN_ON_ONCE(1); | |
1da177e4 | 2681 | return; |
956fb531 | 2682 | } |
1da177e4 | 2683 | |
cf4c6a2f | 2684 | entry0 = ioapic_read_entry(apic, pin); |
fcfd636a | 2685 | clear_IO_APIC_pin(apic, pin); |
1da177e4 LT |
2686 | |
2687 | memset(&entry1, 0, sizeof(entry1)); | |
2688 | ||
2689 | entry1.dest_mode = 0; /* physical delivery */ | |
2690 | entry1.mask = 0; /* unmask IRQ now */ | |
d83e94ac | 2691 | entry1.dest = hard_smp_processor_id(); |
1da177e4 LT |
2692 | entry1.delivery_mode = dest_ExtINT; |
2693 | entry1.polarity = entry0.polarity; | |
2694 | entry1.trigger = 0; | |
2695 | entry1.vector = 0; | |
2696 | ||
cf4c6a2f | 2697 | ioapic_write_entry(apic, pin, entry1); |
1da177e4 LT |
2698 | |
2699 | save_control = CMOS_READ(RTC_CONTROL); | |
2700 | save_freq_select = CMOS_READ(RTC_FREQ_SELECT); | |
2701 | CMOS_WRITE((save_freq_select & ~RTC_RATE_SELECT) | 0x6, | |
2702 | RTC_FREQ_SELECT); | |
2703 | CMOS_WRITE(save_control | RTC_PIE, RTC_CONTROL); | |
2704 | ||
2705 | i = 100; | |
2706 | while (i-- > 0) { | |
2707 | mdelay(10); | |
2708 | if ((CMOS_READ(RTC_INTR_FLAGS) & RTC_PF) == RTC_PF) | |
2709 | i -= 10; | |
2710 | } | |
2711 | ||
2712 | CMOS_WRITE(save_control, RTC_CONTROL); | |
2713 | CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT); | |
fcfd636a | 2714 | clear_IO_APIC_pin(apic, pin); |
1da177e4 | 2715 | |
cf4c6a2f | 2716 | ioapic_write_entry(apic, pin, entry0); |
1da177e4 LT |
2717 | } |
2718 | ||
efa2559f | 2719 | static int disable_timer_pin_1 __initdata; |
047c8fdb | 2720 | /* Actually the next is obsolete, but keep it for paranoid reasons -AK */ |
54168ed7 | 2721 | static int __init disable_timer_pin_setup(char *arg) |
efa2559f YL |
2722 | { |
2723 | disable_timer_pin_1 = 1; | |
2724 | return 0; | |
2725 | } | |
54168ed7 | 2726 | early_param("disable_timer_pin_1", disable_timer_pin_setup); |
efa2559f YL |
2727 | |
2728 | int timer_through_8259 __initdata; | |
2729 | ||
1da177e4 LT |
2730 | /* |
2731 | * This code may look a bit paranoid, but it's supposed to cooperate with | |
2732 | * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ | |
2733 | * is so screwy. Thanks to Brian Perkins for testing/hacking this beast | |
2734 | * fanatically on his truly buggy board. | |
54168ed7 IM |
2735 | * |
2736 | * FIXME: really need to revamp this for all platforms. | |
1da177e4 | 2737 | */ |
8542b200 | 2738 | static inline void __init check_timer(void) |
1da177e4 | 2739 | { |
497c9a19 | 2740 | struct irq_cfg *cfg = irq_cfg(0); |
fcfd636a | 2741 | int apic1, pin1, apic2, pin2; |
4aae0702 | 2742 | unsigned long flags; |
047c8fdb YL |
2743 | unsigned int ver; |
2744 | int no_pin1 = 0; | |
4aae0702 IM |
2745 | |
2746 | local_irq_save(flags); | |
d4d25dec | 2747 | |
54168ed7 IM |
2748 | ver = apic_read(APIC_LVR); |
2749 | ver = GET_APIC_VERSION(ver); | |
6e908947 | 2750 | |
1da177e4 LT |
2751 | /* |
2752 | * get/set the timer IRQ vector: | |
2753 | */ | |
2754 | disable_8259A_irq(0); | |
497c9a19 | 2755 | assign_irq_vector(0, TARGET_CPUS); |
1da177e4 LT |
2756 | |
2757 | /* | |
d11d5794 MR |
2758 | * As IRQ0 is to be enabled in the 8259A, the virtual |
2759 | * wire has to be disabled in the local APIC. Also | |
2760 | * timer interrupts need to be acknowledged manually in | |
2761 | * the 8259A for the i82489DX when using the NMI | |
2762 | * watchdog as that APIC treats NMIs as level-triggered. | |
2763 | * The AEOI mode will finish them in the 8259A | |
2764 | * automatically. | |
1da177e4 | 2765 | */ |
593f4a78 | 2766 | apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT); |
1da177e4 | 2767 | init_8259A(1); |
54168ed7 | 2768 | #ifdef CONFIG_X86_32 |
d11d5794 | 2769 | timer_ack = (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver)); |
54168ed7 | 2770 | #endif |
1da177e4 | 2771 | |
fcfd636a EB |
2772 | pin1 = find_isa_irq_pin(0, mp_INT); |
2773 | apic1 = find_isa_irq_apic(0, mp_INT); | |
2774 | pin2 = ioapic_i8259.pin; | |
2775 | apic2 = ioapic_i8259.apic; | |
1da177e4 | 2776 | |
49a66a0b MR |
2777 | apic_printk(APIC_QUIET, KERN_INFO "..TIMER: vector=0x%02X " |
2778 | "apic1=%d pin1=%d apic2=%d pin2=%d\n", | |
497c9a19 | 2779 | cfg->vector, apic1, pin1, apic2, pin2); |
1da177e4 | 2780 | |
691874fa MR |
2781 | /* |
2782 | * Some BIOS writers are clueless and report the ExtINTA | |
2783 | * I/O APIC input from the cascaded 8259A as the timer | |
2784 | * interrupt input. So just in case, if only one pin | |
2785 | * was found above, try it both directly and through the | |
2786 | * 8259A. | |
2787 | */ | |
2788 | if (pin1 == -1) { | |
54168ed7 IM |
2789 | #ifdef CONFIG_INTR_REMAP |
2790 | if (intr_remapping_enabled) | |
2791 | panic("BIOS bug: timer not connected to IO-APIC"); | |
2792 | #endif | |
691874fa MR |
2793 | pin1 = pin2; |
2794 | apic1 = apic2; | |
2795 | no_pin1 = 1; | |
2796 | } else if (pin2 == -1) { | |
2797 | pin2 = pin1; | |
2798 | apic2 = apic1; | |
2799 | } | |
2800 | ||
1da177e4 LT |
2801 | if (pin1 != -1) { |
2802 | /* | |
2803 | * Ok, does IRQ0 through the IOAPIC work? | |
2804 | */ | |
691874fa MR |
2805 | if (no_pin1) { |
2806 | add_pin_to_irq(0, apic1, pin1); | |
497c9a19 | 2807 | setup_timer_IRQ0_pin(apic1, pin1, cfg->vector); |
691874fa | 2808 | } |
1da177e4 LT |
2809 | unmask_IO_APIC_irq(0); |
2810 | if (timer_irq_works()) { | |
2811 | if (nmi_watchdog == NMI_IO_APIC) { | |
1da177e4 LT |
2812 | setup_nmi(); |
2813 | enable_8259A_irq(0); | |
1da177e4 | 2814 | } |
66759a01 CE |
2815 | if (disable_timer_pin_1 > 0) |
2816 | clear_IO_APIC_pin(0, pin1); | |
4aae0702 | 2817 | goto out; |
1da177e4 | 2818 | } |
54168ed7 IM |
2819 | #ifdef CONFIG_INTR_REMAP |
2820 | if (intr_remapping_enabled) | |
2821 | panic("timer doesn't work through Interrupt-remapped IO-APIC"); | |
2822 | #endif | |
fcfd636a | 2823 | clear_IO_APIC_pin(apic1, pin1); |
691874fa | 2824 | if (!no_pin1) |
49a66a0b MR |
2825 | apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: " |
2826 | "8254 timer not connected to IO-APIC\n"); | |
1da177e4 | 2827 | |
49a66a0b MR |
2828 | apic_printk(APIC_QUIET, KERN_INFO "...trying to set up timer " |
2829 | "(IRQ0) through the 8259A ...\n"); | |
2830 | apic_printk(APIC_QUIET, KERN_INFO | |
2831 | "..... (found apic %d pin %d) ...\n", apic2, pin2); | |
1da177e4 LT |
2832 | /* |
2833 | * legacy devices should be connected to IO APIC #0 | |
2834 | */ | |
691874fa | 2835 | replace_pin_at_irq(0, apic1, pin1, apic2, pin2); |
497c9a19 | 2836 | setup_timer_IRQ0_pin(apic2, pin2, cfg->vector); |
24742ece | 2837 | unmask_IO_APIC_irq(0); |
ecd29476 | 2838 | enable_8259A_irq(0); |
1da177e4 | 2839 | if (timer_irq_works()) { |
49a66a0b | 2840 | apic_printk(APIC_QUIET, KERN_INFO "....... works.\n"); |
35542c5e | 2841 | timer_through_8259 = 1; |
1da177e4 | 2842 | if (nmi_watchdog == NMI_IO_APIC) { |
60134ebe | 2843 | disable_8259A_irq(0); |
1da177e4 | 2844 | setup_nmi(); |
60134ebe | 2845 | enable_8259A_irq(0); |
1da177e4 | 2846 | } |
4aae0702 | 2847 | goto out; |
1da177e4 LT |
2848 | } |
2849 | /* | |
2850 | * Cleanup, just in case ... | |
2851 | */ | |
ecd29476 | 2852 | disable_8259A_irq(0); |
fcfd636a | 2853 | clear_IO_APIC_pin(apic2, pin2); |
49a66a0b | 2854 | apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n"); |
1da177e4 | 2855 | } |
1da177e4 LT |
2856 | |
2857 | if (nmi_watchdog == NMI_IO_APIC) { | |
49a66a0b MR |
2858 | apic_printk(APIC_QUIET, KERN_WARNING "timer doesn't work " |
2859 | "through the IO-APIC - disabling NMI Watchdog!\n"); | |
067fa0ff | 2860 | nmi_watchdog = NMI_NONE; |
1da177e4 | 2861 | } |
54168ed7 | 2862 | #ifdef CONFIG_X86_32 |
d11d5794 | 2863 | timer_ack = 0; |
54168ed7 | 2864 | #endif |
1da177e4 | 2865 | |
49a66a0b MR |
2866 | apic_printk(APIC_QUIET, KERN_INFO |
2867 | "...trying to set up timer as Virtual Wire IRQ...\n"); | |
1da177e4 | 2868 | |
497c9a19 YL |
2869 | lapic_register_intr(0); |
2870 | apic_write(APIC_LVT0, APIC_DM_FIXED | cfg->vector); /* Fixed mode */ | |
1da177e4 LT |
2871 | enable_8259A_irq(0); |
2872 | ||
2873 | if (timer_irq_works()) { | |
49a66a0b | 2874 | apic_printk(APIC_QUIET, KERN_INFO "..... works.\n"); |
4aae0702 | 2875 | goto out; |
1da177e4 | 2876 | } |
e67465f1 | 2877 | disable_8259A_irq(0); |
497c9a19 | 2878 | apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector); |
49a66a0b | 2879 | apic_printk(APIC_QUIET, KERN_INFO "..... failed.\n"); |
1da177e4 | 2880 | |
49a66a0b MR |
2881 | apic_printk(APIC_QUIET, KERN_INFO |
2882 | "...trying to set up timer as ExtINT IRQ...\n"); | |
1da177e4 | 2883 | |
1da177e4 LT |
2884 | init_8259A(0); |
2885 | make_8259A_irq(0); | |
593f4a78 | 2886 | apic_write(APIC_LVT0, APIC_DM_EXTINT); |
1da177e4 LT |
2887 | |
2888 | unlock_ExtINT_logic(); | |
2889 | ||
2890 | if (timer_irq_works()) { | |
49a66a0b | 2891 | apic_printk(APIC_QUIET, KERN_INFO "..... works.\n"); |
4aae0702 | 2892 | goto out; |
1da177e4 | 2893 | } |
49a66a0b | 2894 | apic_printk(APIC_QUIET, KERN_INFO "..... failed :(.\n"); |
1da177e4 | 2895 | panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a " |
49a66a0b | 2896 | "report. Then try booting with the 'noapic' option.\n"); |
4aae0702 IM |
2897 | out: |
2898 | local_irq_restore(flags); | |
1da177e4 LT |
2899 | } |
2900 | ||
2901 | /* | |
af174783 MR |
2902 | * Traditionally ISA IRQ2 is the cascade IRQ, and is not available |
2903 | * to devices. However there may be an I/O APIC pin available for | |
2904 | * this interrupt regardless. The pin may be left unconnected, but | |
2905 | * typically it will be reused as an ExtINT cascade interrupt for | |
2906 | * the master 8259A. In the MPS case such a pin will normally be | |
2907 | * reported as an ExtINT interrupt in the MP table. With ACPI | |
2908 | * there is no provision for ExtINT interrupts, and in the absence | |
2909 | * of an override it would be treated as an ordinary ISA I/O APIC | |
2910 | * interrupt, that is edge-triggered and unmasked by default. We | |
2911 | * used to do this, but it caused problems on some systems because | |
2912 | * of the NMI watchdog and sometimes IRQ0 of the 8254 timer using | |
2913 | * the same ExtINT cascade interrupt to drive the local APIC of the | |
2914 | * bootstrap processor. Therefore we refrain from routing IRQ2 to | |
2915 | * the I/O APIC in all cases now. No actual device should request | |
2916 | * it anyway. --macro | |
1da177e4 LT |
2917 | */ |
2918 | #define PIC_IRQS (1 << PIC_CASCADE_IR) | |
2919 | ||
2920 | void __init setup_IO_APIC(void) | |
2921 | { | |
54168ed7 IM |
2922 | |
2923 | #ifdef CONFIG_X86_32 | |
1da177e4 | 2924 | enable_IO_APIC(); |
54168ed7 IM |
2925 | #else |
2926 | /* | |
2927 | * calling enable_IO_APIC() is moved to setup_local_APIC for BP | |
2928 | */ | |
2929 | #endif | |
1da177e4 | 2930 | |
af174783 | 2931 | io_apic_irqs = ~PIC_IRQS; |
1da177e4 | 2932 | |
54168ed7 IM |
2933 | apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n"); |
2934 | /* | |
2935 | * Set up IO-APIC IRQ routing. | |
2936 | */ | |
2937 | #ifdef CONFIG_X86_32 | |
2938 | if (!acpi_ioapic) | |
2939 | setup_ioapic_ids_from_mpc(); | |
2940 | #endif | |
1da177e4 LT |
2941 | sync_Arb_IDs(); |
2942 | setup_IO_APIC_irqs(); | |
2943 | init_IO_APIC_traps(); | |
1e4c85f9 | 2944 | check_timer(); |
1da177e4 LT |
2945 | } |
2946 | ||
2947 | /* | |
54168ed7 IM |
2948 | * Called after all the initialization is done. If we didnt find any |
2949 | * APIC bugs then we can allow the modify fast path | |
1da177e4 | 2950 | */ |
36062448 | 2951 | |
1da177e4 LT |
2952 | static int __init io_apic_bug_finalize(void) |
2953 | { | |
54168ed7 IM |
2954 | if (sis_apic_bug == -1) |
2955 | sis_apic_bug = 0; | |
2956 | return 0; | |
1da177e4 LT |
2957 | } |
2958 | ||
2959 | late_initcall(io_apic_bug_finalize); | |
2960 | ||
2961 | struct sysfs_ioapic_data { | |
2962 | struct sys_device dev; | |
2963 | struct IO_APIC_route_entry entry[0]; | |
2964 | }; | |
54168ed7 | 2965 | static struct sysfs_ioapic_data * mp_ioapic_data[MAX_IO_APICS]; |
1da177e4 | 2966 | |
438510f6 | 2967 | static int ioapic_suspend(struct sys_device *dev, pm_message_t state) |
1da177e4 LT |
2968 | { |
2969 | struct IO_APIC_route_entry *entry; | |
2970 | struct sysfs_ioapic_data *data; | |
1da177e4 | 2971 | int i; |
36062448 | 2972 | |
1da177e4 LT |
2973 | data = container_of(dev, struct sysfs_ioapic_data, dev); |
2974 | entry = data->entry; | |
54168ed7 IM |
2975 | for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) |
2976 | *entry = ioapic_read_entry(dev->id, i); | |
1da177e4 LT |
2977 | |
2978 | return 0; | |
2979 | } | |
2980 | ||
2981 | static int ioapic_resume(struct sys_device *dev) | |
2982 | { | |
2983 | struct IO_APIC_route_entry *entry; | |
2984 | struct sysfs_ioapic_data *data; | |
2985 | unsigned long flags; | |
2986 | union IO_APIC_reg_00 reg_00; | |
2987 | int i; | |
36062448 | 2988 | |
1da177e4 LT |
2989 | data = container_of(dev, struct sysfs_ioapic_data, dev); |
2990 | entry = data->entry; | |
2991 | ||
2992 | spin_lock_irqsave(&ioapic_lock, flags); | |
2993 | reg_00.raw = io_apic_read(dev->id, 0); | |
ec2cd0a2 AS |
2994 | if (reg_00.bits.ID != mp_ioapics[dev->id].mp_apicid) { |
2995 | reg_00.bits.ID = mp_ioapics[dev->id].mp_apicid; | |
1da177e4 LT |
2996 | io_apic_write(dev->id, 0, reg_00.raw); |
2997 | } | |
1da177e4 | 2998 | spin_unlock_irqrestore(&ioapic_lock, flags); |
36062448 | 2999 | for (i = 0; i < nr_ioapic_registers[dev->id]; i++) |
cf4c6a2f | 3000 | ioapic_write_entry(dev->id, i, entry[i]); |
1da177e4 LT |
3001 | |
3002 | return 0; | |
3003 | } | |
3004 | ||
3005 | static struct sysdev_class ioapic_sysdev_class = { | |
af5ca3f4 | 3006 | .name = "ioapic", |
1da177e4 LT |
3007 | .suspend = ioapic_suspend, |
3008 | .resume = ioapic_resume, | |
3009 | }; | |
3010 | ||
3011 | static int __init ioapic_init_sysfs(void) | |
3012 | { | |
54168ed7 IM |
3013 | struct sys_device * dev; |
3014 | int i, size, error; | |
1da177e4 LT |
3015 | |
3016 | error = sysdev_class_register(&ioapic_sysdev_class); | |
3017 | if (error) | |
3018 | return error; | |
3019 | ||
54168ed7 | 3020 | for (i = 0; i < nr_ioapics; i++ ) { |
36062448 | 3021 | size = sizeof(struct sys_device) + nr_ioapic_registers[i] |
1da177e4 | 3022 | * sizeof(struct IO_APIC_route_entry); |
25556c16 | 3023 | mp_ioapic_data[i] = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
3024 | if (!mp_ioapic_data[i]) { |
3025 | printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i); | |
3026 | continue; | |
3027 | } | |
1da177e4 | 3028 | dev = &mp_ioapic_data[i]->dev; |
36062448 | 3029 | dev->id = i; |
1da177e4 LT |
3030 | dev->cls = &ioapic_sysdev_class; |
3031 | error = sysdev_register(dev); | |
3032 | if (error) { | |
3033 | kfree(mp_ioapic_data[i]); | |
3034 | mp_ioapic_data[i] = NULL; | |
3035 | printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i); | |
3036 | continue; | |
3037 | } | |
3038 | } | |
3039 | ||
3040 | return 0; | |
3041 | } | |
3042 | ||
3043 | device_initcall(ioapic_init_sysfs); | |
3044 | ||
3fc471ed | 3045 | /* |
95d77884 | 3046 | * Dynamic irq allocate and deallocation |
3fc471ed | 3047 | */ |
199751d7 | 3048 | unsigned int create_irq_nr(unsigned int irq_want) |
3fc471ed | 3049 | { |
ace80ab7 | 3050 | /* Allocate an unused irq */ |
54168ed7 IM |
3051 | unsigned int irq; |
3052 | unsigned int new; | |
3fc471ed | 3053 | unsigned long flags; |
da51a821 | 3054 | struct irq_cfg *cfg_new; |
3fc471ed | 3055 | |
497c9a19 | 3056 | #ifndef CONFIG_HAVE_SPARSE_IRQ |
199751d7 | 3057 | irq_want = nr_irqs - 1; |
497c9a19 | 3058 | #endif |
199751d7 YL |
3059 | |
3060 | irq = 0; | |
ace80ab7 | 3061 | spin_lock_irqsave(&vector_lock, flags); |
54168ed7 | 3062 | for (new = irq_want; new > 0; new--) { |
ace80ab7 EB |
3063 | if (platform_legacy_irq(new)) |
3064 | continue; | |
da51a821 YL |
3065 | cfg_new = irq_cfg(new); |
3066 | if (cfg_new && cfg_new->vector != 0) | |
ace80ab7 | 3067 | continue; |
047c8fdb | 3068 | /* check if need to create one */ |
da51a821 YL |
3069 | if (!cfg_new) |
3070 | cfg_new = irq_cfg_alloc(new); | |
497c9a19 | 3071 | if (__assign_irq_vector(new, TARGET_CPUS) == 0) |
ace80ab7 EB |
3072 | irq = new; |
3073 | break; | |
3074 | } | |
3075 | spin_unlock_irqrestore(&vector_lock, flags); | |
3fc471ed | 3076 | |
199751d7 | 3077 | if (irq > 0) { |
3fc471ed EB |
3078 | dynamic_irq_init(irq); |
3079 | } | |
3080 | return irq; | |
3081 | } | |
3082 | ||
199751d7 YL |
3083 | int create_irq(void) |
3084 | { | |
54168ed7 IM |
3085 | int irq; |
3086 | ||
3087 | irq = create_irq_nr(nr_irqs - 1); | |
3088 | ||
3089 | if (irq == 0) | |
3090 | irq = -1; | |
3091 | ||
3092 | return irq; | |
199751d7 YL |
3093 | } |
3094 | ||
3fc471ed EB |
3095 | void destroy_irq(unsigned int irq) |
3096 | { | |
3097 | unsigned long flags; | |
3fc471ed EB |
3098 | |
3099 | dynamic_irq_cleanup(irq); | |
3100 | ||
54168ed7 IM |
3101 | #ifdef CONFIG_INTR_REMAP |
3102 | free_irte(irq); | |
3103 | #endif | |
3fc471ed | 3104 | spin_lock_irqsave(&vector_lock, flags); |
497c9a19 | 3105 | __clear_irq_vector(irq); |
3fc471ed EB |
3106 | spin_unlock_irqrestore(&vector_lock, flags); |
3107 | } | |
3fc471ed | 3108 | |
2d3fcc1c | 3109 | /* |
27b46d76 | 3110 | * MSI message composition |
2d3fcc1c EB |
3111 | */ |
3112 | #ifdef CONFIG_PCI_MSI | |
3b7d1921 | 3113 | static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg) |
2d3fcc1c | 3114 | { |
497c9a19 YL |
3115 | struct irq_cfg *cfg; |
3116 | int err; | |
2d3fcc1c | 3117 | unsigned dest; |
497c9a19 | 3118 | cpumask_t tmp; |
2d3fcc1c | 3119 | |
497c9a19 YL |
3120 | tmp = TARGET_CPUS; |
3121 | err = assign_irq_vector(irq, tmp); | |
3122 | if (err) | |
3123 | return err; | |
2d3fcc1c | 3124 | |
497c9a19 YL |
3125 | cfg = irq_cfg(irq); |
3126 | cpus_and(tmp, cfg->domain, tmp); | |
3127 | dest = cpu_mask_to_apicid(tmp); | |
3128 | ||
54168ed7 IM |
3129 | #ifdef CONFIG_INTR_REMAP |
3130 | if (irq_remapped(irq)) { | |
3131 | struct irte irte; | |
3132 | int ir_index; | |
3133 | u16 sub_handle; | |
3134 | ||
3135 | ir_index = map_irq_to_irte_handle(irq, &sub_handle); | |
3136 | BUG_ON(ir_index == -1); | |
3137 | ||
3138 | memset (&irte, 0, sizeof(irte)); | |
3139 | ||
3140 | irte.present = 1; | |
3141 | irte.dst_mode = INT_DEST_MODE; | |
3142 | irte.trigger_mode = 0; /* edge */ | |
3143 | irte.dlvry_mode = INT_DELIVERY_MODE; | |
3144 | irte.vector = cfg->vector; | |
3145 | irte.dest_id = IRTE_DEST(dest); | |
3146 | ||
3147 | modify_irte(irq, &irte); | |
3148 | ||
3149 | msg->address_hi = MSI_ADDR_BASE_HI; | |
3150 | msg->data = sub_handle; | |
3151 | msg->address_lo = MSI_ADDR_BASE_LO | MSI_ADDR_IR_EXT_INT | | |
3152 | MSI_ADDR_IR_SHV | | |
3153 | MSI_ADDR_IR_INDEX1(ir_index) | | |
3154 | MSI_ADDR_IR_INDEX2(ir_index); | |
3155 | } else | |
3156 | #endif | |
3157 | { | |
3158 | msg->address_hi = MSI_ADDR_BASE_HI; | |
3159 | msg->address_lo = | |
3160 | MSI_ADDR_BASE_LO | | |
3161 | ((INT_DEST_MODE == 0) ? | |
3162 | MSI_ADDR_DEST_MODE_PHYSICAL: | |
3163 | MSI_ADDR_DEST_MODE_LOGICAL) | | |
3164 | ((INT_DELIVERY_MODE != dest_LowestPrio) ? | |
3165 | MSI_ADDR_REDIRECTION_CPU: | |
3166 | MSI_ADDR_REDIRECTION_LOWPRI) | | |
3167 | MSI_ADDR_DEST_ID(dest); | |
497c9a19 | 3168 | |
54168ed7 IM |
3169 | msg->data = |
3170 | MSI_DATA_TRIGGER_EDGE | | |
3171 | MSI_DATA_LEVEL_ASSERT | | |
3172 | ((INT_DELIVERY_MODE != dest_LowestPrio) ? | |
3173 | MSI_DATA_DELIVERY_FIXED: | |
3174 | MSI_DATA_DELIVERY_LOWPRI) | | |
3175 | MSI_DATA_VECTOR(cfg->vector); | |
3176 | } | |
497c9a19 | 3177 | return err; |
2d3fcc1c EB |
3178 | } |
3179 | ||
3b7d1921 EB |
3180 | #ifdef CONFIG_SMP |
3181 | static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask) | |
2d3fcc1c | 3182 | { |
497c9a19 | 3183 | struct irq_cfg *cfg; |
3b7d1921 EB |
3184 | struct msi_msg msg; |
3185 | unsigned int dest; | |
3186 | cpumask_t tmp; | |
54168ed7 | 3187 | struct irq_desc *desc; |
3b7d1921 EB |
3188 | |
3189 | cpus_and(tmp, mask, cpu_online_map); | |
3190 | if (cpus_empty(tmp)) | |
497c9a19 | 3191 | return; |
2d3fcc1c | 3192 | |
497c9a19 | 3193 | if (assign_irq_vector(irq, mask)) |
3b7d1921 | 3194 | return; |
2d3fcc1c | 3195 | |
497c9a19 YL |
3196 | cfg = irq_cfg(irq); |
3197 | cpus_and(tmp, cfg->domain, mask); | |
3198 | dest = cpu_mask_to_apicid(tmp); | |
3b7d1921 EB |
3199 | |
3200 | read_msi_msg(irq, &msg); | |
3201 | ||
3202 | msg.data &= ~MSI_DATA_VECTOR_MASK; | |
497c9a19 | 3203 | msg.data |= MSI_DATA_VECTOR(cfg->vector); |
3b7d1921 EB |
3204 | msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; |
3205 | msg.address_lo |= MSI_ADDR_DEST_ID(dest); | |
3206 | ||
3207 | write_msi_msg(irq, &msg); | |
54168ed7 IM |
3208 | desc = irq_to_desc(irq); |
3209 | desc->affinity = mask; | |
2d3fcc1c | 3210 | } |
54168ed7 IM |
3211 | |
3212 | #ifdef CONFIG_INTR_REMAP | |
3213 | /* | |
3214 | * Migrate the MSI irq to another cpumask. This migration is | |
3215 | * done in the process context using interrupt-remapping hardware. | |
3216 | */ | |
3217 | static void ir_set_msi_irq_affinity(unsigned int irq, cpumask_t mask) | |
3218 | { | |
3219 | struct irq_cfg *cfg; | |
3220 | unsigned int dest; | |
3221 | cpumask_t tmp, cleanup_mask; | |
3222 | struct irte irte; | |
3223 | struct irq_desc *desc; | |
3224 | ||
3225 | cpus_and(tmp, mask, cpu_online_map); | |
3226 | if (cpus_empty(tmp)) | |
3227 | return; | |
3228 | ||
3229 | if (get_irte(irq, &irte)) | |
3230 | return; | |
3231 | ||
3232 | if (assign_irq_vector(irq, mask)) | |
3233 | return; | |
3234 | ||
3235 | cfg = irq_cfg(irq); | |
3236 | cpus_and(tmp, cfg->domain, mask); | |
3237 | dest = cpu_mask_to_apicid(tmp); | |
3238 | ||
3239 | irte.vector = cfg->vector; | |
3240 | irte.dest_id = IRTE_DEST(dest); | |
3241 | ||
3242 | /* | |
3243 | * atomically update the IRTE with the new destination and vector. | |
3244 | */ | |
3245 | modify_irte(irq, &irte); | |
3246 | ||
3247 | /* | |
3248 | * After this point, all the interrupts will start arriving | |
3249 | * at the new destination. So, time to cleanup the previous | |
3250 | * vector allocation. | |
3251 | */ | |
3252 | if (cfg->move_in_progress) { | |
3253 | cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map); | |
3254 | cfg->move_cleanup_count = cpus_weight(cleanup_mask); | |
3255 | send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); | |
3256 | cfg->move_in_progress = 0; | |
3257 | } | |
3258 | ||
3259 | desc = irq_to_desc(irq); | |
3260 | desc->affinity = mask; | |
3261 | } | |
3262 | #endif | |
3b7d1921 | 3263 | #endif /* CONFIG_SMP */ |
2d3fcc1c | 3264 | |
3b7d1921 EB |
3265 | /* |
3266 | * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices, | |
3267 | * which implement the MSI or MSI-X Capability Structure. | |
3268 | */ | |
3269 | static struct irq_chip msi_chip = { | |
3270 | .name = "PCI-MSI", | |
3271 | .unmask = unmask_msi_irq, | |
3272 | .mask = mask_msi_irq, | |
1d025192 | 3273 | .ack = ack_apic_edge, |
3b7d1921 EB |
3274 | #ifdef CONFIG_SMP |
3275 | .set_affinity = set_msi_irq_affinity, | |
3276 | #endif | |
3277 | .retrigger = ioapic_retrigger_irq, | |
2d3fcc1c EB |
3278 | }; |
3279 | ||
54168ed7 IM |
3280 | #ifdef CONFIG_INTR_REMAP |
3281 | static struct irq_chip msi_ir_chip = { | |
3282 | .name = "IR-PCI-MSI", | |
3283 | .unmask = unmask_msi_irq, | |
3284 | .mask = mask_msi_irq, | |
3285 | .ack = ack_x2apic_edge, | |
3286 | #ifdef CONFIG_SMP | |
3287 | .set_affinity = ir_set_msi_irq_affinity, | |
3288 | #endif | |
3289 | .retrigger = ioapic_retrigger_irq, | |
3290 | }; | |
3291 | ||
3292 | /* | |
3293 | * Map the PCI dev to the corresponding remapping hardware unit | |
3294 | * and allocate 'nvec' consecutive interrupt-remapping table entries | |
3295 | * in it. | |
3296 | */ | |
3297 | static int msi_alloc_irte(struct pci_dev *dev, int irq, int nvec) | |
3298 | { | |
3299 | struct intel_iommu *iommu; | |
3300 | int index; | |
3301 | ||
3302 | iommu = map_dev_to_ir(dev); | |
3303 | if (!iommu) { | |
3304 | printk(KERN_ERR | |
3305 | "Unable to map PCI %s to iommu\n", pci_name(dev)); | |
3306 | return -ENOENT; | |
3307 | } | |
3308 | ||
3309 | index = alloc_irte(iommu, irq, nvec); | |
3310 | if (index < 0) { | |
3311 | printk(KERN_ERR | |
3312 | "Unable to allocate %d IRTE for PCI %s\n", nvec, | |
3313 | pci_name(dev)); | |
3314 | return -ENOSPC; | |
3315 | } | |
3316 | return index; | |
3317 | } | |
3318 | #endif | |
1d025192 YL |
3319 | |
3320 | static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc, int irq) | |
3321 | { | |
3322 | int ret; | |
3323 | struct msi_msg msg; | |
3324 | ||
3325 | ret = msi_compose_msg(dev, irq, &msg); | |
3326 | if (ret < 0) | |
3327 | return ret; | |
3328 | ||
3329 | set_irq_msi(irq, desc); | |
3330 | write_msi_msg(irq, &msg); | |
3331 | ||
54168ed7 IM |
3332 | #ifdef CONFIG_INTR_REMAP |
3333 | if (irq_remapped(irq)) { | |
3334 | struct irq_desc *desc = irq_to_desc(irq); | |
3335 | /* | |
3336 | * irq migration in process context | |
3337 | */ | |
3338 | desc->status |= IRQ_MOVE_PCNTXT; | |
3339 | set_irq_chip_and_handler_name(irq, &msi_ir_chip, handle_edge_irq, "edge"); | |
3340 | } else | |
3341 | #endif | |
3342 | set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq, "edge"); | |
1d025192 YL |
3343 | |
3344 | return 0; | |
3345 | } | |
3346 | ||
199751d7 YL |
3347 | static unsigned int build_irq_for_pci_dev(struct pci_dev *dev) |
3348 | { | |
3349 | unsigned int irq; | |
3350 | ||
3351 | irq = dev->bus->number; | |
3352 | irq <<= 8; | |
3353 | irq |= dev->devfn; | |
3354 | irq <<= 12; | |
3355 | ||
3356 | return irq; | |
3357 | } | |
3358 | ||
f7feaca7 | 3359 | int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) |
3b7d1921 | 3360 | { |
54168ed7 IM |
3361 | unsigned int irq; |
3362 | int ret; | |
199751d7 YL |
3363 | unsigned int irq_want; |
3364 | ||
3365 | irq_want = build_irq_for_pci_dev(dev) + 0x100; | |
3366 | ||
3367 | irq = create_irq_nr(irq_want); | |
199751d7 YL |
3368 | if (irq == 0) |
3369 | return -1; | |
f7feaca7 | 3370 | |
54168ed7 IM |
3371 | #ifdef CONFIG_INTR_REMAP |
3372 | if (!intr_remapping_enabled) | |
3373 | goto no_ir; | |
3374 | ||
3375 | ret = msi_alloc_irte(dev, irq, 1); | |
3376 | if (ret < 0) | |
3377 | goto error; | |
3378 | no_ir: | |
3379 | #endif | |
1d025192 | 3380 | ret = setup_msi_irq(dev, desc, irq); |
f7feaca7 EB |
3381 | if (ret < 0) { |
3382 | destroy_irq(irq); | |
3b7d1921 | 3383 | return ret; |
54168ed7 | 3384 | } |
7fe3730d | 3385 | return 0; |
54168ed7 IM |
3386 | |
3387 | #ifdef CONFIG_INTR_REMAP | |
3388 | error: | |
3389 | destroy_irq(irq); | |
3390 | return ret; | |
3391 | #endif | |
3b7d1921 EB |
3392 | } |
3393 | ||
047c8fdb YL |
3394 | int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) |
3395 | { | |
54168ed7 IM |
3396 | unsigned int irq; |
3397 | int ret, sub_handle; | |
3398 | struct msi_desc *desc; | |
3399 | unsigned int irq_want; | |
3400 | ||
3401 | #ifdef CONFIG_INTR_REMAP | |
3402 | struct intel_iommu *iommu = 0; | |
3403 | int index = 0; | |
3404 | #endif | |
3405 | ||
3406 | irq_want = build_irq_for_pci_dev(dev) + 0x100; | |
3407 | sub_handle = 0; | |
3408 | list_for_each_entry(desc, &dev->msi_list, list) { | |
3409 | irq = create_irq_nr(irq_want--); | |
3410 | if (irq == 0) | |
3411 | return -1; | |
3412 | #ifdef CONFIG_INTR_REMAP | |
3413 | if (!intr_remapping_enabled) | |
3414 | goto no_ir; | |
3415 | ||
3416 | if (!sub_handle) { | |
3417 | /* | |
3418 | * allocate the consecutive block of IRTE's | |
3419 | * for 'nvec' | |
3420 | */ | |
3421 | index = msi_alloc_irte(dev, irq, nvec); | |
3422 | if (index < 0) { | |
3423 | ret = index; | |
3424 | goto error; | |
3425 | } | |
3426 | } else { | |
3427 | iommu = map_dev_to_ir(dev); | |
3428 | if (!iommu) { | |
3429 | ret = -ENOENT; | |
3430 | goto error; | |
3431 | } | |
3432 | /* | |
3433 | * setup the mapping between the irq and the IRTE | |
3434 | * base index, the sub_handle pointing to the | |
3435 | * appropriate interrupt remap table entry. | |
3436 | */ | |
3437 | set_irte_irq(irq, iommu, index, sub_handle); | |
3438 | } | |
3439 | no_ir: | |
3440 | #endif | |
3441 | ret = setup_msi_irq(dev, desc, irq); | |
3442 | if (ret < 0) | |
3443 | goto error; | |
3444 | sub_handle++; | |
3445 | } | |
3446 | return 0; | |
047c8fdb YL |
3447 | |
3448 | error: | |
54168ed7 IM |
3449 | destroy_irq(irq); |
3450 | return ret; | |
047c8fdb YL |
3451 | } |
3452 | ||
3b7d1921 EB |
3453 | void arch_teardown_msi_irq(unsigned int irq) |
3454 | { | |
f7feaca7 | 3455 | destroy_irq(irq); |
3b7d1921 EB |
3456 | } |
3457 | ||
54168ed7 IM |
3458 | #ifdef CONFIG_DMAR |
3459 | #ifdef CONFIG_SMP | |
3460 | static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask) | |
3461 | { | |
3462 | struct irq_cfg *cfg; | |
3463 | struct msi_msg msg; | |
3464 | unsigned int dest; | |
3465 | cpumask_t tmp; | |
3466 | struct irq_desc *desc; | |
3467 | ||
3468 | cpus_and(tmp, mask, cpu_online_map); | |
3469 | if (cpus_empty(tmp)) | |
3470 | return; | |
3471 | ||
3472 | if (assign_irq_vector(irq, mask)) | |
3473 | return; | |
3474 | ||
3475 | cfg = irq_cfg(irq); | |
3476 | cpus_and(tmp, cfg->domain, mask); | |
3477 | dest = cpu_mask_to_apicid(tmp); | |
3478 | ||
3479 | dmar_msi_read(irq, &msg); | |
3480 | ||
3481 | msg.data &= ~MSI_DATA_VECTOR_MASK; | |
3482 | msg.data |= MSI_DATA_VECTOR(cfg->vector); | |
3483 | msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; | |
3484 | msg.address_lo |= MSI_ADDR_DEST_ID(dest); | |
3485 | ||
3486 | dmar_msi_write(irq, &msg); | |
3487 | desc = irq_to_desc(irq); | |
3488 | desc->affinity = mask; | |
3489 | } | |
3490 | #endif /* CONFIG_SMP */ | |
3491 | ||
3492 | struct irq_chip dmar_msi_type = { | |
3493 | .name = "DMAR_MSI", | |
3494 | .unmask = dmar_msi_unmask, | |
3495 | .mask = dmar_msi_mask, | |
3496 | .ack = ack_apic_edge, | |
3497 | #ifdef CONFIG_SMP | |
3498 | .set_affinity = dmar_msi_set_affinity, | |
3499 | #endif | |
3500 | .retrigger = ioapic_retrigger_irq, | |
3501 | }; | |
3502 | ||
3503 | int arch_setup_dmar_msi(unsigned int irq) | |
3504 | { | |
3505 | int ret; | |
3506 | struct msi_msg msg; | |
2d3fcc1c | 3507 | |
54168ed7 IM |
3508 | ret = msi_compose_msg(NULL, irq, &msg); |
3509 | if (ret < 0) | |
3510 | return ret; | |
3511 | dmar_msi_write(irq, &msg); | |
3512 | set_irq_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq, | |
3513 | "edge"); | |
3514 | return 0; | |
3515 | } | |
3516 | #endif | |
3517 | ||
3518 | #endif /* CONFIG_PCI_MSI */ | |
8b955b0d EB |
3519 | /* |
3520 | * Hypertransport interrupt support | |
3521 | */ | |
3522 | #ifdef CONFIG_HT_IRQ | |
3523 | ||
3524 | #ifdef CONFIG_SMP | |
3525 | ||
497c9a19 | 3526 | static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector) |
8b955b0d | 3527 | { |
ec68307c EB |
3528 | struct ht_irq_msg msg; |
3529 | fetch_ht_irq_msg(irq, &msg); | |
8b955b0d | 3530 | |
497c9a19 | 3531 | msg.address_lo &= ~(HT_IRQ_LOW_VECTOR_MASK | HT_IRQ_LOW_DEST_ID_MASK); |
ec68307c | 3532 | msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK); |
8b955b0d | 3533 | |
497c9a19 | 3534 | msg.address_lo |= HT_IRQ_LOW_VECTOR(vector) | HT_IRQ_LOW_DEST_ID(dest); |
ec68307c | 3535 | msg.address_hi |= HT_IRQ_HIGH_DEST_ID(dest); |
8b955b0d | 3536 | |
ec68307c | 3537 | write_ht_irq_msg(irq, &msg); |
8b955b0d EB |
3538 | } |
3539 | ||
3540 | static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask) | |
3541 | { | |
497c9a19 | 3542 | struct irq_cfg *cfg; |
8b955b0d EB |
3543 | unsigned int dest; |
3544 | cpumask_t tmp; | |
54168ed7 | 3545 | struct irq_desc *desc; |
8b955b0d EB |
3546 | |
3547 | cpus_and(tmp, mask, cpu_online_map); | |
3548 | if (cpus_empty(tmp)) | |
497c9a19 | 3549 | return; |
8b955b0d | 3550 | |
497c9a19 YL |
3551 | if (assign_irq_vector(irq, mask)) |
3552 | return; | |
8b955b0d | 3553 | |
497c9a19 YL |
3554 | cfg = irq_cfg(irq); |
3555 | cpus_and(tmp, cfg->domain, mask); | |
3556 | dest = cpu_mask_to_apicid(tmp); | |
8b955b0d | 3557 | |
497c9a19 | 3558 | target_ht_irq(irq, dest, cfg->vector); |
54168ed7 IM |
3559 | desc = irq_to_desc(irq); |
3560 | desc->affinity = mask; | |
8b955b0d EB |
3561 | } |
3562 | #endif | |
3563 | ||
c37e108d | 3564 | static struct irq_chip ht_irq_chip = { |
8b955b0d EB |
3565 | .name = "PCI-HT", |
3566 | .mask = mask_ht_irq, | |
3567 | .unmask = unmask_ht_irq, | |
1d025192 | 3568 | .ack = ack_apic_edge, |
8b955b0d EB |
3569 | #ifdef CONFIG_SMP |
3570 | .set_affinity = set_ht_irq_affinity, | |
3571 | #endif | |
3572 | .retrigger = ioapic_retrigger_irq, | |
3573 | }; | |
3574 | ||
3575 | int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) | |
3576 | { | |
497c9a19 YL |
3577 | struct irq_cfg *cfg; |
3578 | int err; | |
3579 | cpumask_t tmp; | |
8b955b0d | 3580 | |
497c9a19 YL |
3581 | tmp = TARGET_CPUS; |
3582 | err = assign_irq_vector(irq, tmp); | |
54168ed7 | 3583 | if (!err) { |
ec68307c | 3584 | struct ht_irq_msg msg; |
8b955b0d | 3585 | unsigned dest; |
8b955b0d | 3586 | |
497c9a19 YL |
3587 | cfg = irq_cfg(irq); |
3588 | cpus_and(tmp, cfg->domain, tmp); | |
8b955b0d EB |
3589 | dest = cpu_mask_to_apicid(tmp); |
3590 | ||
ec68307c | 3591 | msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest); |
8b955b0d | 3592 | |
ec68307c EB |
3593 | msg.address_lo = |
3594 | HT_IRQ_LOW_BASE | | |
8b955b0d | 3595 | HT_IRQ_LOW_DEST_ID(dest) | |
497c9a19 | 3596 | HT_IRQ_LOW_VECTOR(cfg->vector) | |
8b955b0d EB |
3597 | ((INT_DEST_MODE == 0) ? |
3598 | HT_IRQ_LOW_DM_PHYSICAL : | |
3599 | HT_IRQ_LOW_DM_LOGICAL) | | |
3600 | HT_IRQ_LOW_RQEOI_EDGE | | |
3601 | ((INT_DELIVERY_MODE != dest_LowestPrio) ? | |
3602 | HT_IRQ_LOW_MT_FIXED : | |
3603 | HT_IRQ_LOW_MT_ARBITRATED) | | |
3604 | HT_IRQ_LOW_IRQ_MASKED; | |
3605 | ||
ec68307c | 3606 | write_ht_irq_msg(irq, &msg); |
8b955b0d | 3607 | |
a460e745 IM |
3608 | set_irq_chip_and_handler_name(irq, &ht_irq_chip, |
3609 | handle_edge_irq, "edge"); | |
8b955b0d | 3610 | } |
497c9a19 | 3611 | return err; |
8b955b0d EB |
3612 | } |
3613 | #endif /* CONFIG_HT_IRQ */ | |
3614 | ||
1da177e4 | 3615 | /* -------------------------------------------------------------------------- |
54168ed7 | 3616 | ACPI-based IOAPIC Configuration |
1da177e4 LT |
3617 | -------------------------------------------------------------------------- */ |
3618 | ||
888ba6c6 | 3619 | #ifdef CONFIG_ACPI |
1da177e4 | 3620 | |
54168ed7 | 3621 | #ifdef CONFIG_X86_32 |
36062448 | 3622 | int __init io_apic_get_unique_id(int ioapic, int apic_id) |
1da177e4 LT |
3623 | { |
3624 | union IO_APIC_reg_00 reg_00; | |
3625 | static physid_mask_t apic_id_map = PHYSID_MASK_NONE; | |
3626 | physid_mask_t tmp; | |
3627 | unsigned long flags; | |
3628 | int i = 0; | |
3629 | ||
3630 | /* | |
36062448 PC |
3631 | * The P4 platform supports up to 256 APIC IDs on two separate APIC |
3632 | * buses (one for LAPICs, one for IOAPICs), where predecessors only | |
1da177e4 | 3633 | * supports up to 16 on one shared APIC bus. |
36062448 | 3634 | * |
1da177e4 LT |
3635 | * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full |
3636 | * advantage of new APIC bus architecture. | |
3637 | */ | |
3638 | ||
3639 | if (physids_empty(apic_id_map)) | |
3640 | apic_id_map = ioapic_phys_id_map(phys_cpu_present_map); | |
3641 | ||
3642 | spin_lock_irqsave(&ioapic_lock, flags); | |
3643 | reg_00.raw = io_apic_read(ioapic, 0); | |
3644 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
3645 | ||
3646 | if (apic_id >= get_physical_broadcast()) { | |
3647 | printk(KERN_WARNING "IOAPIC[%d]: Invalid apic_id %d, trying " | |
3648 | "%d\n", ioapic, apic_id, reg_00.bits.ID); | |
3649 | apic_id = reg_00.bits.ID; | |
3650 | } | |
3651 | ||
3652 | /* | |
36062448 | 3653 | * Every APIC in a system must have a unique ID or we get lots of nice |
1da177e4 LT |
3654 | * 'stuck on smp_invalidate_needed IPI wait' messages. |
3655 | */ | |
3656 | if (check_apicid_used(apic_id_map, apic_id)) { | |
3657 | ||
3658 | for (i = 0; i < get_physical_broadcast(); i++) { | |
3659 | if (!check_apicid_used(apic_id_map, i)) | |
3660 | break; | |
3661 | } | |
3662 | ||
3663 | if (i == get_physical_broadcast()) | |
3664 | panic("Max apic_id exceeded!\n"); | |
3665 | ||
3666 | printk(KERN_WARNING "IOAPIC[%d]: apic_id %d already used, " | |
3667 | "trying %d\n", ioapic, apic_id, i); | |
3668 | ||
3669 | apic_id = i; | |
36062448 | 3670 | } |
1da177e4 LT |
3671 | |
3672 | tmp = apicid_to_cpu_present(apic_id); | |
3673 | physids_or(apic_id_map, apic_id_map, tmp); | |
3674 | ||
3675 | if (reg_00.bits.ID != apic_id) { | |
3676 | reg_00.bits.ID = apic_id; | |
3677 | ||
3678 | spin_lock_irqsave(&ioapic_lock, flags); | |
3679 | io_apic_write(ioapic, 0, reg_00.raw); | |
3680 | reg_00.raw = io_apic_read(ioapic, 0); | |
3681 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
3682 | ||
3683 | /* Sanity check */ | |
6070f9ec AD |
3684 | if (reg_00.bits.ID != apic_id) { |
3685 | printk("IOAPIC[%d]: Unable to change apic_id!\n", ioapic); | |
3686 | return -1; | |
3687 | } | |
1da177e4 LT |
3688 | } |
3689 | ||
3690 | apic_printk(APIC_VERBOSE, KERN_INFO | |
3691 | "IOAPIC[%d]: Assigned apic_id %d\n", ioapic, apic_id); | |
3692 | ||
3693 | return apic_id; | |
3694 | } | |
3695 | ||
36062448 | 3696 | int __init io_apic_get_version(int ioapic) |
1da177e4 LT |
3697 | { |
3698 | union IO_APIC_reg_01 reg_01; | |
3699 | unsigned long flags; | |
3700 | ||
3701 | spin_lock_irqsave(&ioapic_lock, flags); | |
3702 | reg_01.raw = io_apic_read(ioapic, 1); | |
3703 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
3704 | ||
3705 | return reg_01.bits.version; | |
3706 | } | |
54168ed7 | 3707 | #endif |
1da177e4 | 3708 | |
54168ed7 | 3709 | int __init io_apic_get_redir_entries (int ioapic) |
1da177e4 LT |
3710 | { |
3711 | union IO_APIC_reg_01 reg_01; | |
3712 | unsigned long flags; | |
3713 | ||
3714 | spin_lock_irqsave(&ioapic_lock, flags); | |
3715 | reg_01.raw = io_apic_read(ioapic, 1); | |
3716 | spin_unlock_irqrestore(&ioapic_lock, flags); | |
3717 | ||
3718 | return reg_01.bits.entries; | |
3719 | } | |
3720 | ||
3721 | ||
54168ed7 | 3722 | int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int polarity) |
1da177e4 | 3723 | { |
1da177e4 | 3724 | if (!IO_APIC_IRQ(irq)) { |
54168ed7 | 3725 | apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n", |
1da177e4 LT |
3726 | ioapic); |
3727 | return -EINVAL; | |
3728 | } | |
3729 | ||
1da177e4 LT |
3730 | /* |
3731 | * IRQs < 16 are already in the irq_2_pin[] map | |
3732 | */ | |
3733 | if (irq >= 16) | |
3734 | add_pin_to_irq(irq, ioapic, pin); | |
3735 | ||
497c9a19 | 3736 | setup_IO_APIC_irq(ioapic, pin, irq, triggering, polarity); |
1da177e4 LT |
3737 | |
3738 | return 0; | |
3739 | } | |
3740 | ||
54168ed7 | 3741 | |
61fd47e0 SL |
3742 | int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity) |
3743 | { | |
3744 | int i; | |
3745 | ||
3746 | if (skip_ioapic_setup) | |
3747 | return -1; | |
3748 | ||
3749 | for (i = 0; i < mp_irq_entries; i++) | |
2fddb6e2 AS |
3750 | if (mp_irqs[i].mp_irqtype == mp_INT && |
3751 | mp_irqs[i].mp_srcbusirq == bus_irq) | |
61fd47e0 SL |
3752 | break; |
3753 | if (i >= mp_irq_entries) | |
3754 | return -1; | |
3755 | ||
3756 | *trigger = irq_trigger(i); | |
3757 | *polarity = irq_polarity(i); | |
3758 | return 0; | |
3759 | } | |
3760 | ||
888ba6c6 | 3761 | #endif /* CONFIG_ACPI */ |
1a3f239d | 3762 | |
497c9a19 YL |
3763 | /* |
3764 | * This function currently is only a helper for the i386 smp boot process where | |
3765 | * we need to reprogram the ioredtbls to cater for the cpus which have come online | |
3766 | * so mask in all cases should simply be TARGET_CPUS | |
3767 | */ | |
3768 | #ifdef CONFIG_SMP | |
3769 | void __init setup_ioapic_dest(void) | |
3770 | { | |
3771 | int pin, ioapic, irq, irq_entry; | |
3772 | struct irq_cfg *cfg; | |
497c9a19 YL |
3773 | |
3774 | if (skip_ioapic_setup == 1) | |
3775 | return; | |
3776 | ||
3777 | for (ioapic = 0; ioapic < nr_ioapics; ioapic++) { | |
3778 | for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) { | |
3779 | irq_entry = find_irq_entry(ioapic, pin, mp_INT); | |
3780 | if (irq_entry == -1) | |
3781 | continue; | |
3782 | irq = pin_2_irq(irq_entry, ioapic, pin); | |
3783 | ||
3784 | /* setup_IO_APIC_irqs could fail to get vector for some device | |
3785 | * when you have too many devices, because at that time only boot | |
3786 | * cpu is online. | |
3787 | */ | |
3788 | cfg = irq_cfg(irq); | |
3789 | if (!cfg->vector) | |
3790 | setup_IO_APIC_irq(ioapic, pin, irq, | |
3791 | irq_trigger(irq_entry), | |
3792 | irq_polarity(irq_entry)); | |
54168ed7 IM |
3793 | #ifdef CONFIG_INTR_REMAP |
3794 | else if (intr_remapping_enabled) | |
3795 | set_ir_ioapic_affinity_irq(irq, TARGET_CPUS); | |
3796 | #endif | |
3797 | else | |
497c9a19 | 3798 | set_ioapic_affinity_irq(irq, TARGET_CPUS); |
497c9a19 YL |
3799 | } |
3800 | ||
3801 | } | |
3802 | } | |
3803 | #endif | |
3804 | ||
54168ed7 IM |
3805 | #define IOAPIC_RESOURCE_NAME_SIZE 11 |
3806 | ||
3807 | static struct resource *ioapic_resources; | |
3808 | ||
3809 | static struct resource * __init ioapic_setup_resources(void) | |
3810 | { | |
3811 | unsigned long n; | |
3812 | struct resource *res; | |
3813 | char *mem; | |
3814 | int i; | |
3815 | ||
3816 | if (nr_ioapics <= 0) | |
3817 | return NULL; | |
3818 | ||
3819 | n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource); | |
3820 | n *= nr_ioapics; | |
3821 | ||
3822 | mem = alloc_bootmem(n); | |
3823 | res = (void *)mem; | |
3824 | ||
3825 | if (mem != NULL) { | |
3826 | mem += sizeof(struct resource) * nr_ioapics; | |
3827 | ||
3828 | for (i = 0; i < nr_ioapics; i++) { | |
3829 | res[i].name = mem; | |
3830 | res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
3831 | sprintf(mem, "IOAPIC %u", i); | |
3832 | mem += IOAPIC_RESOURCE_NAME_SIZE; | |
3833 | } | |
3834 | } | |
3835 | ||
3836 | ioapic_resources = res; | |
3837 | ||
3838 | return res; | |
3839 | } | |
54168ed7 | 3840 | |
f3294a33 YL |
3841 | void __init ioapic_init_mappings(void) |
3842 | { | |
3843 | unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0; | |
3844 | int i; | |
54168ed7 | 3845 | struct resource *ioapic_res; |
f3294a33 | 3846 | |
54168ed7 | 3847 | ioapic_res = ioapic_setup_resources(); |
f3294a33 YL |
3848 | for (i = 0; i < nr_ioapics; i++) { |
3849 | if (smp_found_config) { | |
3850 | ioapic_phys = mp_ioapics[i].mp_apicaddr; | |
54168ed7 IM |
3851 | #ifdef CONFIG_X86_32 |
3852 | if (!ioapic_phys) { | |
3853 | printk(KERN_ERR | |
3854 | "WARNING: bogus zero IO-APIC " | |
3855 | "address found in MPTABLE, " | |
3856 | "disabling IO/APIC support!\n"); | |
3857 | smp_found_config = 0; | |
3858 | skip_ioapic_setup = 1; | |
3859 | goto fake_ioapic_page; | |
3860 | } | |
3861 | #endif | |
f3294a33 | 3862 | } else { |
54168ed7 | 3863 | #ifdef CONFIG_X86_32 |
f3294a33 | 3864 | fake_ioapic_page: |
54168ed7 | 3865 | #endif |
f3294a33 | 3866 | ioapic_phys = (unsigned long) |
54168ed7 | 3867 | alloc_bootmem_pages(PAGE_SIZE); |
f3294a33 YL |
3868 | ioapic_phys = __pa(ioapic_phys); |
3869 | } | |
3870 | set_fixmap_nocache(idx, ioapic_phys); | |
54168ed7 IM |
3871 | apic_printk(APIC_VERBOSE, |
3872 | "mapped IOAPIC to %08lx (%08lx)\n", | |
3873 | __fix_to_virt(idx), ioapic_phys); | |
f3294a33 | 3874 | idx++; |
54168ed7 | 3875 | |
54168ed7 IM |
3876 | if (ioapic_res != NULL) { |
3877 | ioapic_res->start = ioapic_phys; | |
3878 | ioapic_res->end = ioapic_phys + (4 * 1024) - 1; | |
3879 | ioapic_res++; | |
3880 | } | |
f3294a33 YL |
3881 | } |
3882 | } | |
3883 | ||
54168ed7 IM |
3884 | static int __init ioapic_insert_resources(void) |
3885 | { | |
3886 | int i; | |
3887 | struct resource *r = ioapic_resources; | |
3888 | ||
3889 | if (!r) { | |
3890 | printk(KERN_ERR | |
3891 | "IO APIC resources could be not be allocated.\n"); | |
3892 | return -1; | |
3893 | } | |
3894 | ||
3895 | for (i = 0; i < nr_ioapics; i++) { | |
3896 | insert_resource(&iomem_resource, r); | |
3897 | r++; | |
3898 | } | |
3899 | ||
3900 | return 0; | |
3901 | } | |
3902 | ||
3903 | /* Insert the IO APIC resources after PCI initialization has occured to handle | |
3904 | * IO APICS that are mapped in on a BAR in PCI space. */ | |
3905 | late_initcall(ioapic_insert_resources); |