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x86/unwinder: Handle stack overflows more gracefully
[linux/fpc-iii.git] / arch / mips / cavium-octeon / octeon-irq.c
blob5b3a3f6a9ad31fd845bd18cdd3197d9c75833c84
1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2004-2016 Cavium, Inc.
7 */
8
9 #include <linux/of_address.h>
10 #include <linux/interrupt.h>
11 #include <linux/irqdomain.h>
12 #include <linux/bitops.h>
13 #include <linux/of_irq.h>
14 #include <linux/percpu.h>
15 #include <linux/slab.h>
16 #include <linux/irq.h>
17 #include <linux/smp.h>
18 #include <linux/of.h>
19
20 #include <asm/octeon/octeon.h>
21 #include <asm/octeon/cvmx-ciu2-defs.h>
22 #include <asm/octeon/cvmx-ciu3-defs.h>
23
24 static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu0_en_mirror);
25 static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu1_en_mirror);
26 static DEFINE_PER_CPU(raw_spinlock_t, octeon_irq_ciu_spinlock);
27 static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip2);
28
29 static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip3);
30 static DEFINE_PER_CPU(struct octeon_ciu3_info *, octeon_ciu3_info);
31 #define CIU3_MBOX_PER_CORE 10
32
33 /*
34 * The 8 most significant bits of the intsn identify the interrupt major block.
35 * Each major block might use its own interrupt domain. Thus 256 domains are
36 * needed.
37 */
38 #define MAX_CIU3_DOMAINS 256
39
40 typedef irq_hw_number_t (*octeon_ciu3_intsn2hw_t)(struct irq_domain *, unsigned int);
41
42 /* Information for each ciu3 in the system */
43 struct octeon_ciu3_info {
44 u64 ciu3_addr;
45 int node;
46 struct irq_domain *domain[MAX_CIU3_DOMAINS];
47 octeon_ciu3_intsn2hw_t intsn2hw[MAX_CIU3_DOMAINS];
48 };
49
50 /* Each ciu3 in the system uses its own data (one ciu3 per node) */
51 static struct octeon_ciu3_info *octeon_ciu3_info_per_node[4];
52
53 struct octeon_irq_ciu_domain_data {
54 int num_sum; /* number of sum registers (2 or 3). */
55 };
56
57 /* Register offsets from ciu3_addr */
58 #define CIU3_CONST 0x220
59 #define CIU3_IDT_CTL(_idt) ((_idt) * 8 + 0x110000)
60 #define CIU3_IDT_PP(_idt, _idx) ((_idt) * 32 + (_idx) * 8 + 0x120000)
61 #define CIU3_IDT_IO(_idt) ((_idt) * 8 + 0x130000)
62 #define CIU3_DEST_PP_INT(_pp_ip) ((_pp_ip) * 8 + 0x200000)
63 #define CIU3_DEST_IO_INT(_io) ((_io) * 8 + 0x210000)
64 #define CIU3_ISC_CTL(_intsn) ((_intsn) * 8 + 0x80000000)
65 #define CIU3_ISC_W1C(_intsn) ((_intsn) * 8 + 0x90000000)
66 #define CIU3_ISC_W1S(_intsn) ((_intsn) * 8 + 0xa0000000)
67
68 static __read_mostly int octeon_irq_ciu_to_irq[8][64];
69
70 struct octeon_ciu_chip_data {
71 union {
72 struct { /* only used for ciu3 */
73 u64 ciu3_addr;
74 unsigned int intsn;
75 };
76 struct { /* only used for ciu/ciu2 */
77 u8 line;
78 u8 bit;
79 };
80 };
81 int gpio_line;
82 int current_cpu; /* Next CPU expected to take this irq */
83 int ciu_node; /* NUMA node number of the CIU */
84 };
85
86 struct octeon_core_chip_data {
87 struct mutex core_irq_mutex;
88 bool current_en;
89 bool desired_en;
90 u8 bit;
91 };
92
93 #define MIPS_CORE_IRQ_LINES 8
94
95 static struct octeon_core_chip_data octeon_irq_core_chip_data[MIPS_CORE_IRQ_LINES];
96
97 static int octeon_irq_set_ciu_mapping(int irq, int line, int bit, int gpio_line,
98 struct irq_chip *chip,
99 irq_flow_handler_t handler)
100 {
101 struct octeon_ciu_chip_data *cd;
102
103 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
104 if (!cd)
105 return -ENOMEM;
106
107 irq_set_chip_and_handler(irq, chip, handler);
108
109 cd->line = line;
110 cd->bit = bit;
111 cd->gpio_line = gpio_line;
112
113 irq_set_chip_data(irq, cd);
114 octeon_irq_ciu_to_irq[line][bit] = irq;
115 return 0;
116 }
117
118 static void octeon_irq_free_cd(struct irq_domain *d, unsigned int irq)
119 {
120 struct irq_data *data = irq_get_irq_data(irq);
121 struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
122
123 irq_set_chip_data(irq, NULL);
124 kfree(cd);
125 }
126
127 static int octeon_irq_force_ciu_mapping(struct irq_domain *domain,
128 int irq, int line, int bit)
129 {
130 return irq_domain_associate(domain, irq, line << 6 | bit);
131 }
132
133 static int octeon_coreid_for_cpu(int cpu)
134 {
135 #ifdef CONFIG_SMP
136 return cpu_logical_map(cpu);
137 #else
138 return cvmx_get_core_num();
139 #endif
140 }
141
142 static int octeon_cpu_for_coreid(int coreid)
143 {
144 #ifdef CONFIG_SMP
145 return cpu_number_map(coreid);
146 #else
147 return smp_processor_id();
148 #endif
149 }
150
151 static void octeon_irq_core_ack(struct irq_data *data)
152 {
153 struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
154 unsigned int bit = cd->bit;
155
156 /*
157 * We don't need to disable IRQs to make these atomic since
158 * they are already disabled earlier in the low level
159 * interrupt code.
160 */
161 clear_c0_status(0x100 << bit);
162 /* The two user interrupts must be cleared manually. */
163 if (bit < 2)
164 clear_c0_cause(0x100 << bit);
165 }
166
167 static void octeon_irq_core_eoi(struct irq_data *data)
168 {
169 struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
170
171 /*
172 * We don't need to disable IRQs to make these atomic since
173 * they are already disabled earlier in the low level
174 * interrupt code.
175 */
176 set_c0_status(0x100 << cd->bit);
177 }
178
179 static void octeon_irq_core_set_enable_local(void *arg)
180 {
181 struct irq_data *data = arg;
182 struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
183 unsigned int mask = 0x100 << cd->bit;
184
185 /*
186 * Interrupts are already disabled, so these are atomic.
187 */
188 if (cd->desired_en)
189 set_c0_status(mask);
190 else
191 clear_c0_status(mask);
192
193 }
194
195 static void octeon_irq_core_disable(struct irq_data *data)
196 {
197 struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
198 cd->desired_en = false;
199 }
200
201 static void octeon_irq_core_enable(struct irq_data *data)
202 {
203 struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
204 cd->desired_en = true;
205 }
206
207 static void octeon_irq_core_bus_lock(struct irq_data *data)
208 {
209 struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
210
211 mutex_lock(&cd->core_irq_mutex);
212 }
213
214 static void octeon_irq_core_bus_sync_unlock(struct irq_data *data)
215 {
216 struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
217
218 if (cd->desired_en != cd->current_en) {
219 on_each_cpu(octeon_irq_core_set_enable_local, data, 1);
220
221 cd->current_en = cd->desired_en;
222 }
223
224 mutex_unlock(&cd->core_irq_mutex);
225 }
226
227 static struct irq_chip octeon_irq_chip_core = {
228 .name = "Core",
229 .irq_enable = octeon_irq_core_enable,
230 .irq_disable = octeon_irq_core_disable,
231 .irq_ack = octeon_irq_core_ack,
232 .irq_eoi = octeon_irq_core_eoi,
233 .irq_bus_lock = octeon_irq_core_bus_lock,
234 .irq_bus_sync_unlock = octeon_irq_core_bus_sync_unlock,
235
236 .irq_cpu_online = octeon_irq_core_eoi,
237 .irq_cpu_offline = octeon_irq_core_ack,
238 .flags = IRQCHIP_ONOFFLINE_ENABLED,
239 };
240
241 static void __init octeon_irq_init_core(void)
242 {
243 int i;
244 int irq;
245 struct octeon_core_chip_data *cd;
246
247 for (i = 0; i < MIPS_CORE_IRQ_LINES; i++) {
248 cd = &octeon_irq_core_chip_data[i];
249 cd->current_en = false;
250 cd->desired_en = false;
251 cd->bit = i;
252 mutex_init(&cd->core_irq_mutex);
253
254 irq = OCTEON_IRQ_SW0 + i;
255 irq_set_chip_data(irq, cd);
256 irq_set_chip_and_handler(irq, &octeon_irq_chip_core,
257 handle_percpu_irq);
258 }
259 }
260
261 static int next_cpu_for_irq(struct irq_data *data)
262 {
263
264 #ifdef CONFIG_SMP
265 int cpu;
266 struct cpumask *mask = irq_data_get_affinity_mask(data);
267 int weight = cpumask_weight(mask);
268 struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
269
270 if (weight > 1) {
271 cpu = cd->current_cpu;
272 for (;;) {
273 cpu = cpumask_next(cpu, mask);
274 if (cpu >= nr_cpu_ids) {
275 cpu = -1;
276 continue;
277 } else if (cpumask_test_cpu(cpu, cpu_online_mask)) {
278 break;
279 }
280 }
281 } else if (weight == 1) {
282 cpu = cpumask_first(mask);
283 } else {
284 cpu = smp_processor_id();
285 }
286 cd->current_cpu = cpu;
287 return cpu;
288 #else
289 return smp_processor_id();
290 #endif
291 }
292
293 static void octeon_irq_ciu_enable(struct irq_data *data)
294 {
295 int cpu = next_cpu_for_irq(data);
296 int coreid = octeon_coreid_for_cpu(cpu);
297 unsigned long *pen;
298 unsigned long flags;
299 struct octeon_ciu_chip_data *cd;
300 raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
301
302 cd = irq_data_get_irq_chip_data(data);
303
304 raw_spin_lock_irqsave(lock, flags);
305 if (cd->line == 0) {
306 pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
307 __set_bit(cd->bit, pen);
308 /*
309 * Must be visible to octeon_irq_ip{2,3}_ciu() before
310 * enabling the irq.
311 */
312 wmb();
313 cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
314 } else {
315 pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
316 __set_bit(cd->bit, pen);
317 /*
318 * Must be visible to octeon_irq_ip{2,3}_ciu() before
319 * enabling the irq.
320 */
321 wmb();
322 cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
323 }
324 raw_spin_unlock_irqrestore(lock, flags);
325 }
326
327 static void octeon_irq_ciu_enable_local(struct irq_data *data)
328 {
329 unsigned long *pen;
330 unsigned long flags;
331 struct octeon_ciu_chip_data *cd;
332 raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);
333
334 cd = irq_data_get_irq_chip_data(data);
335
336 raw_spin_lock_irqsave(lock, flags);
337 if (cd->line == 0) {
338 pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
339 __set_bit(cd->bit, pen);
340 /*
341 * Must be visible to octeon_irq_ip{2,3}_ciu() before
342 * enabling the irq.
343 */
344 wmb();
345 cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
346 } else {
347 pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
348 __set_bit(cd->bit, pen);
349 /*
350 * Must be visible to octeon_irq_ip{2,3}_ciu() before
351 * enabling the irq.
352 */
353 wmb();
354 cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
355 }
356 raw_spin_unlock_irqrestore(lock, flags);
357 }
358
359 static void octeon_irq_ciu_disable_local(struct irq_data *data)
360 {
361 unsigned long *pen;
362 unsigned long flags;
363 struct octeon_ciu_chip_data *cd;
364 raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);
365
366 cd = irq_data_get_irq_chip_data(data);
367
368 raw_spin_lock_irqsave(lock, flags);
369 if (cd->line == 0) {
370 pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
371 __clear_bit(cd->bit, pen);
372 /*
373 * Must be visible to octeon_irq_ip{2,3}_ciu() before
374 * enabling the irq.
375 */
376 wmb();
377 cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
378 } else {
379 pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
380 __clear_bit(cd->bit, pen);
381 /*
382 * Must be visible to octeon_irq_ip{2,3}_ciu() before
383 * enabling the irq.
384 */
385 wmb();
386 cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
387 }
388 raw_spin_unlock_irqrestore(lock, flags);
389 }
390
391 static void octeon_irq_ciu_disable_all(struct irq_data *data)
392 {
393 unsigned long flags;
394 unsigned long *pen;
395 int cpu;
396 struct octeon_ciu_chip_data *cd;
397 raw_spinlock_t *lock;
398
399 cd = irq_data_get_irq_chip_data(data);
400
401 for_each_online_cpu(cpu) {
402 int coreid = octeon_coreid_for_cpu(cpu);
403 lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
404 if (cd->line == 0)
405 pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
406 else
407 pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
408
409 raw_spin_lock_irqsave(lock, flags);
410 __clear_bit(cd->bit, pen);
411 /*
412 * Must be visible to octeon_irq_ip{2,3}_ciu() before
413 * enabling the irq.
414 */
415 wmb();
416 if (cd->line == 0)
417 cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
418 else
419 cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
420 raw_spin_unlock_irqrestore(lock, flags);
421 }
422 }
423
424 static void octeon_irq_ciu_enable_all(struct irq_data *data)
425 {
426 unsigned long flags;
427 unsigned long *pen;
428 int cpu;
429 struct octeon_ciu_chip_data *cd;
430 raw_spinlock_t *lock;
431
432 cd = irq_data_get_irq_chip_data(data);
433
434 for_each_online_cpu(cpu) {
435 int coreid = octeon_coreid_for_cpu(cpu);
436 lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
437 if (cd->line == 0)
438 pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
439 else
440 pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
441
442 raw_spin_lock_irqsave(lock, flags);
443 __set_bit(cd->bit, pen);
444 /*
445 * Must be visible to octeon_irq_ip{2,3}_ciu() before
446 * enabling the irq.
447 */
448 wmb();
449 if (cd->line == 0)
450 cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
451 else
452 cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
453 raw_spin_unlock_irqrestore(lock, flags);
454 }
455 }
456
457 /*
458 * Enable the irq on the next core in the affinity set for chips that
459 * have the EN*_W1{S,C} registers.
460 */
461 static void octeon_irq_ciu_enable_v2(struct irq_data *data)
462 {
463 u64 mask;
464 int cpu = next_cpu_for_irq(data);
465 struct octeon_ciu_chip_data *cd;
466
467 cd = irq_data_get_irq_chip_data(data);
468 mask = 1ull << (cd->bit);
469
470 /*
471 * Called under the desc lock, so these should never get out
472 * of sync.
473 */
474 if (cd->line == 0) {
475 int index = octeon_coreid_for_cpu(cpu) * 2;
476 set_bit(cd->bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu));
477 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
478 } else {
479 int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
480 set_bit(cd->bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
481 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
482 }
483 }
484
485 /*
486 * Enable the irq in the sum2 registers.
487 */
488 static void octeon_irq_ciu_enable_sum2(struct irq_data *data)
489 {
490 u64 mask;
491 int cpu = next_cpu_for_irq(data);
492 int index = octeon_coreid_for_cpu(cpu);
493 struct octeon_ciu_chip_data *cd;
494
495 cd = irq_data_get_irq_chip_data(data);
496 mask = 1ull << (cd->bit);
497
498 cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
499 }
500
501 /*
502 * Disable the irq in the sum2 registers.
503 */
504 static void octeon_irq_ciu_disable_local_sum2(struct irq_data *data)
505 {
506 u64 mask;
507 int cpu = next_cpu_for_irq(data);
508 int index = octeon_coreid_for_cpu(cpu);
509 struct octeon_ciu_chip_data *cd;
510
511 cd = irq_data_get_irq_chip_data(data);
512 mask = 1ull << (cd->bit);
513
514 cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
515 }
516
517 static void octeon_irq_ciu_ack_sum2(struct irq_data *data)
518 {
519 u64 mask;
520 int cpu = next_cpu_for_irq(data);
521 int index = octeon_coreid_for_cpu(cpu);
522 struct octeon_ciu_chip_data *cd;
523
524 cd = irq_data_get_irq_chip_data(data);
525 mask = 1ull << (cd->bit);
526
527 cvmx_write_csr(CVMX_CIU_SUM2_PPX_IP4(index), mask);
528 }
529
530 static void octeon_irq_ciu_disable_all_sum2(struct irq_data *data)
531 {
532 int cpu;
533 struct octeon_ciu_chip_data *cd;
534 u64 mask;
535
536 cd = irq_data_get_irq_chip_data(data);
537 mask = 1ull << (cd->bit);
538
539 for_each_online_cpu(cpu) {
540 int coreid = octeon_coreid_for_cpu(cpu);
541
542 cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(coreid), mask);
543 }
544 }
545
546 /*
547 * Enable the irq on the current CPU for chips that
548 * have the EN*_W1{S,C} registers.
549 */
550 static void octeon_irq_ciu_enable_local_v2(struct irq_data *data)
551 {
552 u64 mask;
553 struct octeon_ciu_chip_data *cd;
554
555 cd = irq_data_get_irq_chip_data(data);
556 mask = 1ull << (cd->bit);
557
558 if (cd->line == 0) {
559 int index = cvmx_get_core_num() * 2;
560 set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror));
561 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
562 } else {
563 int index = cvmx_get_core_num() * 2 + 1;
564 set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror));
565 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
566 }
567 }
568
569 static void octeon_irq_ciu_disable_local_v2(struct irq_data *data)
570 {
571 u64 mask;
572 struct octeon_ciu_chip_data *cd;
573
574 cd = irq_data_get_irq_chip_data(data);
575 mask = 1ull << (cd->bit);
576
577 if (cd->line == 0) {
578 int index = cvmx_get_core_num() * 2;
579 clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror));
580 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
581 } else {
582 int index = cvmx_get_core_num() * 2 + 1;
583 clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror));
584 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
585 }
586 }
587
588 /*
589 * Write to the W1C bit in CVMX_CIU_INTX_SUM0 to clear the irq.
590 */
591 static void octeon_irq_ciu_ack(struct irq_data *data)
592 {
593 u64 mask;
594 struct octeon_ciu_chip_data *cd;
595
596 cd = irq_data_get_irq_chip_data(data);
597 mask = 1ull << (cd->bit);
598
599 if (cd->line == 0) {
600 int index = cvmx_get_core_num() * 2;
601 cvmx_write_csr(CVMX_CIU_INTX_SUM0(index), mask);
602 } else {
603 cvmx_write_csr(CVMX_CIU_INT_SUM1, mask);
604 }
605 }
606
607 /*
608 * Disable the irq on the all cores for chips that have the EN*_W1{S,C}
609 * registers.
610 */
611 static void octeon_irq_ciu_disable_all_v2(struct irq_data *data)
612 {
613 int cpu;
614 u64 mask;
615 struct octeon_ciu_chip_data *cd;
616
617 cd = irq_data_get_irq_chip_data(data);
618 mask = 1ull << (cd->bit);
619
620 if (cd->line == 0) {
621 for_each_online_cpu(cpu) {
622 int index = octeon_coreid_for_cpu(cpu) * 2;
623 clear_bit(cd->bit,
624 &per_cpu(octeon_irq_ciu0_en_mirror, cpu));
625 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
626 }
627 } else {
628 for_each_online_cpu(cpu) {
629 int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
630 clear_bit(cd->bit,
631 &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
632 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
633 }
634 }
635 }
636
637 /*
638 * Enable the irq on the all cores for chips that have the EN*_W1{S,C}
639 * registers.
640 */
641 static void octeon_irq_ciu_enable_all_v2(struct irq_data *data)
642 {
643 int cpu;
644 u64 mask;
645 struct octeon_ciu_chip_data *cd;
646
647 cd = irq_data_get_irq_chip_data(data);
648 mask = 1ull << (cd->bit);
649
650 if (cd->line == 0) {
651 for_each_online_cpu(cpu) {
652 int index = octeon_coreid_for_cpu(cpu) * 2;
653 set_bit(cd->bit,
654 &per_cpu(octeon_irq_ciu0_en_mirror, cpu));
655 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
656 }
657 } else {
658 for_each_online_cpu(cpu) {
659 int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
660 set_bit(cd->bit,
661 &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
662 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
663 }
664 }
665 }
666
667 static int octeon_irq_ciu_set_type(struct irq_data *data, unsigned int t)
668 {
669 irqd_set_trigger_type(data, t);
670
671 if (t & IRQ_TYPE_EDGE_BOTH)
672 irq_set_handler_locked(data, handle_edge_irq);
673 else
674 irq_set_handler_locked(data, handle_level_irq);
675
676 return IRQ_SET_MASK_OK;
677 }
678
679 static void octeon_irq_gpio_setup(struct irq_data *data)
680 {
681 union cvmx_gpio_bit_cfgx cfg;
682 struct octeon_ciu_chip_data *cd;
683 u32 t = irqd_get_trigger_type(data);
684
685 cd = irq_data_get_irq_chip_data(data);
686
687 cfg.u64 = 0;
688 cfg.s.int_en = 1;
689 cfg.s.int_type = (t & IRQ_TYPE_EDGE_BOTH) != 0;
690 cfg.s.rx_xor = (t & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) != 0;
691
692 /* 140 nS glitch filter*/
693 cfg.s.fil_cnt = 7;
694 cfg.s.fil_sel = 3;
695
696 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), cfg.u64);
697 }
698
699 static void octeon_irq_ciu_enable_gpio_v2(struct irq_data *data)
700 {
701 octeon_irq_gpio_setup(data);
702 octeon_irq_ciu_enable_v2(data);
703 }
704
705 static void octeon_irq_ciu_enable_gpio(struct irq_data *data)
706 {
707 octeon_irq_gpio_setup(data);
708 octeon_irq_ciu_enable(data);
709 }
710
711 static int octeon_irq_ciu_gpio_set_type(struct irq_data *data, unsigned int t)
712 {
713 irqd_set_trigger_type(data, t);
714 octeon_irq_gpio_setup(data);
715
716 if (t & IRQ_TYPE_EDGE_BOTH)
717 irq_set_handler_locked(data, handle_edge_irq);
718 else
719 irq_set_handler_locked(data, handle_level_irq);
720
721 return IRQ_SET_MASK_OK;
722 }
723
724 static void octeon_irq_ciu_disable_gpio_v2(struct irq_data *data)
725 {
726 struct octeon_ciu_chip_data *cd;
727
728 cd = irq_data_get_irq_chip_data(data);
729 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
730
731 octeon_irq_ciu_disable_all_v2(data);
732 }
733
734 static void octeon_irq_ciu_disable_gpio(struct irq_data *data)
735 {
736 struct octeon_ciu_chip_data *cd;
737
738 cd = irq_data_get_irq_chip_data(data);
739 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
740
741 octeon_irq_ciu_disable_all(data);
742 }
743
744 static void octeon_irq_ciu_gpio_ack(struct irq_data *data)
745 {
746 struct octeon_ciu_chip_data *cd;
747 u64 mask;
748
749 cd = irq_data_get_irq_chip_data(data);
750 mask = 1ull << (cd->gpio_line);
751
752 cvmx_write_csr(CVMX_GPIO_INT_CLR, mask);
753 }
754
755 #ifdef CONFIG_SMP
756
757 static void octeon_irq_cpu_offline_ciu(struct irq_data *data)
758 {
759 int cpu = smp_processor_id();
760 cpumask_t new_affinity;
761 struct cpumask *mask = irq_data_get_affinity_mask(data);
762
763 if (!cpumask_test_cpu(cpu, mask))
764 return;
765
766 if (cpumask_weight(mask) > 1) {
767 /*
768 * It has multi CPU affinity, just remove this CPU
769 * from the affinity set.
770 */
771 cpumask_copy(&new_affinity, mask);
772 cpumask_clear_cpu(cpu, &new_affinity);
773 } else {
774 /* Otherwise, put it on lowest numbered online CPU. */
775 cpumask_clear(&new_affinity);
776 cpumask_set_cpu(cpumask_first(cpu_online_mask), &new_affinity);
777 }
778 irq_set_affinity_locked(data, &new_affinity, false);
779 }
780
781 static int octeon_irq_ciu_set_affinity(struct irq_data *data,
782 const struct cpumask *dest, bool force)
783 {
784 int cpu;
785 bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
786 unsigned long flags;
787 struct octeon_ciu_chip_data *cd;
788 unsigned long *pen;
789 raw_spinlock_t *lock;
790
791 cd = irq_data_get_irq_chip_data(data);
792
793 /*
794 * For non-v2 CIU, we will allow only single CPU affinity.
795 * This removes the need to do locking in the .ack/.eoi
796 * functions.
797 */
798 if (cpumask_weight(dest) != 1)
799 return -EINVAL;
800
801 if (!enable_one)
802 return 0;
803
804
805 for_each_online_cpu(cpu) {
806 int coreid = octeon_coreid_for_cpu(cpu);
807
808 lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
809 raw_spin_lock_irqsave(lock, flags);
810
811 if (cd->line == 0)
812 pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
813 else
814 pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
815
816 if (cpumask_test_cpu(cpu, dest) && enable_one) {
817 enable_one = 0;
818 __set_bit(cd->bit, pen);
819 } else {
820 __clear_bit(cd->bit, pen);
821 }
822 /*
823 * Must be visible to octeon_irq_ip{2,3}_ciu() before
824 * enabling the irq.
825 */
826 wmb();
827
828 if (cd->line == 0)
829 cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
830 else
831 cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
832
833 raw_spin_unlock_irqrestore(lock, flags);
834 }
835 return 0;
836 }
837
838 /*
839 * Set affinity for the irq for chips that have the EN*_W1{S,C}
840 * registers.
841 */
842 static int octeon_irq_ciu_set_affinity_v2(struct irq_data *data,
843 const struct cpumask *dest,
844 bool force)
845 {
846 int cpu;
847 bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
848 u64 mask;
849 struct octeon_ciu_chip_data *cd;
850
851 if (!enable_one)
852 return 0;
853
854 cd = irq_data_get_irq_chip_data(data);
855 mask = 1ull << cd->bit;
856
857 if (cd->line == 0) {
858 for_each_online_cpu(cpu) {
859 unsigned long *pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
860 int index = octeon_coreid_for_cpu(cpu) * 2;
861 if (cpumask_test_cpu(cpu, dest) && enable_one) {
862 enable_one = false;
863 set_bit(cd->bit, pen);
864 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
865 } else {
866 clear_bit(cd->bit, pen);
867 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
868 }
869 }
870 } else {
871 for_each_online_cpu(cpu) {
872 unsigned long *pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
873 int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
874 if (cpumask_test_cpu(cpu, dest) && enable_one) {
875 enable_one = false;
876 set_bit(cd->bit, pen);
877 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
878 } else {
879 clear_bit(cd->bit, pen);
880 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
881 }
882 }
883 }
884 return 0;
885 }
886
887 static int octeon_irq_ciu_set_affinity_sum2(struct irq_data *data,
888 const struct cpumask *dest,
889 bool force)
890 {
891 int cpu;
892 bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
893 u64 mask;
894 struct octeon_ciu_chip_data *cd;
895
896 if (!enable_one)
897 return 0;
898
899 cd = irq_data_get_irq_chip_data(data);
900 mask = 1ull << cd->bit;
901
902 for_each_online_cpu(cpu) {
903 int index = octeon_coreid_for_cpu(cpu);
904
905 if (cpumask_test_cpu(cpu, dest) && enable_one) {
906 enable_one = false;
907 cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
908 } else {
909 cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
910 }
911 }
912 return 0;
913 }
914 #endif
915
916 static unsigned int edge_startup(struct irq_data *data)
917 {
918 /* ack any pending edge-irq at startup, so there is
919 * an _edge_ to fire on when the event reappears.
920 */
921 data->chip->irq_ack(data);
922 data->chip->irq_enable(data);
923 return 0;
924 }
925
926 /*
927 * Newer octeon chips have support for lockless CIU operation.
928 */
929 static struct irq_chip octeon_irq_chip_ciu_v2 = {
930 .name = "CIU",
931 .irq_enable = octeon_irq_ciu_enable_v2,
932 .irq_disable = octeon_irq_ciu_disable_all_v2,
933 .irq_mask = octeon_irq_ciu_disable_local_v2,
934 .irq_unmask = octeon_irq_ciu_enable_v2,
935 #ifdef CONFIG_SMP
936 .irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
937 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
938 #endif
939 };
940
941 static struct irq_chip octeon_irq_chip_ciu_v2_edge = {
942 .name = "CIU",
943 .irq_enable = octeon_irq_ciu_enable_v2,
944 .irq_disable = octeon_irq_ciu_disable_all_v2,
945 .irq_ack = octeon_irq_ciu_ack,
946 .irq_mask = octeon_irq_ciu_disable_local_v2,
947 .irq_unmask = octeon_irq_ciu_enable_v2,
948 #ifdef CONFIG_SMP
949 .irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
950 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
951 #endif
952 };
953
954 /*
955 * Newer octeon chips have support for lockless CIU operation.
956 */
957 static struct irq_chip octeon_irq_chip_ciu_sum2 = {
958 .name = "CIU",
959 .irq_enable = octeon_irq_ciu_enable_sum2,
960 .irq_disable = octeon_irq_ciu_disable_all_sum2,
961 .irq_mask = octeon_irq_ciu_disable_local_sum2,
962 .irq_unmask = octeon_irq_ciu_enable_sum2,
963 #ifdef CONFIG_SMP
964 .irq_set_affinity = octeon_irq_ciu_set_affinity_sum2,
965 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
966 #endif
967 };
968
969 static struct irq_chip octeon_irq_chip_ciu_sum2_edge = {
970 .name = "CIU",
971 .irq_enable = octeon_irq_ciu_enable_sum2,
972 .irq_disable = octeon_irq_ciu_disable_all_sum2,
973 .irq_ack = octeon_irq_ciu_ack_sum2,
974 .irq_mask = octeon_irq_ciu_disable_local_sum2,
975 .irq_unmask = octeon_irq_ciu_enable_sum2,
976 #ifdef CONFIG_SMP
977 .irq_set_affinity = octeon_irq_ciu_set_affinity_sum2,
978 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
979 #endif
980 };
981
982 static struct irq_chip octeon_irq_chip_ciu = {
983 .name = "CIU",
984 .irq_enable = octeon_irq_ciu_enable,
985 .irq_disable = octeon_irq_ciu_disable_all,
986 .irq_mask = octeon_irq_ciu_disable_local,
987 .irq_unmask = octeon_irq_ciu_enable,
988 #ifdef CONFIG_SMP
989 .irq_set_affinity = octeon_irq_ciu_set_affinity,
990 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
991 #endif
992 };
993
994 static struct irq_chip octeon_irq_chip_ciu_edge = {
995 .name = "CIU",
996 .irq_enable = octeon_irq_ciu_enable,
997 .irq_disable = octeon_irq_ciu_disable_all,
998 .irq_ack = octeon_irq_ciu_ack,
999 .irq_mask = octeon_irq_ciu_disable_local,
1000 .irq_unmask = octeon_irq_ciu_enable,
1001 #ifdef CONFIG_SMP
1002 .irq_set_affinity = octeon_irq_ciu_set_affinity,
1003 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1004 #endif
1005 };
1006
1007 /* The mbox versions don't do any affinity or round-robin. */
1008 static struct irq_chip octeon_irq_chip_ciu_mbox_v2 = {
1009 .name = "CIU-M",
1010 .irq_enable = octeon_irq_ciu_enable_all_v2,
1011 .irq_disable = octeon_irq_ciu_disable_all_v2,
1012 .irq_ack = octeon_irq_ciu_disable_local_v2,
1013 .irq_eoi = octeon_irq_ciu_enable_local_v2,
1014
1015 .irq_cpu_online = octeon_irq_ciu_enable_local_v2,
1016 .irq_cpu_offline = octeon_irq_ciu_disable_local_v2,
1017 .flags = IRQCHIP_ONOFFLINE_ENABLED,
1018 };
1019
1020 static struct irq_chip octeon_irq_chip_ciu_mbox = {
1021 .name = "CIU-M",
1022 .irq_enable = octeon_irq_ciu_enable_all,
1023 .irq_disable = octeon_irq_ciu_disable_all,
1024 .irq_ack = octeon_irq_ciu_disable_local,
1025 .irq_eoi = octeon_irq_ciu_enable_local,
1026
1027 .irq_cpu_online = octeon_irq_ciu_enable_local,
1028 .irq_cpu_offline = octeon_irq_ciu_disable_local,
1029 .flags = IRQCHIP_ONOFFLINE_ENABLED,
1030 };
1031
1032 static struct irq_chip octeon_irq_chip_ciu_gpio_v2 = {
1033 .name = "CIU-GPIO",
1034 .irq_enable = octeon_irq_ciu_enable_gpio_v2,
1035 .irq_disable = octeon_irq_ciu_disable_gpio_v2,
1036 .irq_ack = octeon_irq_ciu_gpio_ack,
1037 .irq_mask = octeon_irq_ciu_disable_local_v2,
1038 .irq_unmask = octeon_irq_ciu_enable_v2,
1039 .irq_set_type = octeon_irq_ciu_gpio_set_type,
1040 #ifdef CONFIG_SMP
1041 .irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
1042 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1043 #endif
1044 .flags = IRQCHIP_SET_TYPE_MASKED,
1045 };
1046
1047 static struct irq_chip octeon_irq_chip_ciu_gpio = {
1048 .name = "CIU-GPIO",
1049 .irq_enable = octeon_irq_ciu_enable_gpio,
1050 .irq_disable = octeon_irq_ciu_disable_gpio,
1051 .irq_mask = octeon_irq_ciu_disable_local,
1052 .irq_unmask = octeon_irq_ciu_enable,
1053 .irq_ack = octeon_irq_ciu_gpio_ack,
1054 .irq_set_type = octeon_irq_ciu_gpio_set_type,
1055 #ifdef CONFIG_SMP
1056 .irq_set_affinity = octeon_irq_ciu_set_affinity,
1057 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1058 #endif
1059 .flags = IRQCHIP_SET_TYPE_MASKED,
1060 };
1061
1062 /*
1063 * Watchdog interrupts are special. They are associated with a single
1064 * core, so we hardwire the affinity to that core.
1065 */
1066 static void octeon_irq_ciu_wd_enable(struct irq_data *data)
1067 {
1068 unsigned long flags;
1069 unsigned long *pen;
1070 int coreid = data->irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */
1071 int cpu = octeon_cpu_for_coreid(coreid);
1072 raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
1073
1074 raw_spin_lock_irqsave(lock, flags);
1075 pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
1076 __set_bit(coreid, pen);
1077 /*
1078 * Must be visible to octeon_irq_ip{2,3}_ciu() before enabling
1079 * the irq.
1080 */
1081 wmb();
1082 cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
1083 raw_spin_unlock_irqrestore(lock, flags);
1084 }
1085
1086 /*
1087 * Watchdog interrupts are special. They are associated with a single
1088 * core, so we hardwire the affinity to that core.
1089 */
1090 static void octeon_irq_ciu1_wd_enable_v2(struct irq_data *data)
1091 {
1092 int coreid = data->irq - OCTEON_IRQ_WDOG0;
1093 int cpu = octeon_cpu_for_coreid(coreid);
1094
1095 set_bit(coreid, &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
1096 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(coreid * 2 + 1), 1ull << coreid);
1097 }
1098
1099
1100 static struct irq_chip octeon_irq_chip_ciu_wd_v2 = {
1101 .name = "CIU-W",
1102 .irq_enable = octeon_irq_ciu1_wd_enable_v2,
1103 .irq_disable = octeon_irq_ciu_disable_all_v2,
1104 .irq_mask = octeon_irq_ciu_disable_local_v2,
1105 .irq_unmask = octeon_irq_ciu_enable_local_v2,
1106 };
1107
1108 static struct irq_chip octeon_irq_chip_ciu_wd = {
1109 .name = "CIU-W",
1110 .irq_enable = octeon_irq_ciu_wd_enable,
1111 .irq_disable = octeon_irq_ciu_disable_all,
1112 .irq_mask = octeon_irq_ciu_disable_local,
1113 .irq_unmask = octeon_irq_ciu_enable_local,
1114 };
1115
1116 static bool octeon_irq_ciu_is_edge(unsigned int line, unsigned int bit)
1117 {
1118 bool edge = false;
1119
1120 if (line == 0)
1121 switch (bit) {
1122 case 48 ... 49: /* GMX DRP */
1123 case 50: /* IPD_DRP */
1124 case 52 ... 55: /* Timers */
1125 case 58: /* MPI */
1126 edge = true;
1127 break;
1128 default:
1129 break;
1130 }
1131 else /* line == 1 */
1132 switch (bit) {
1133 case 47: /* PTP */
1134 edge = true;
1135 break;
1136 default:
1137 break;
1138 }
1139 return edge;
1140 }
1141
1142 struct octeon_irq_gpio_domain_data {
1143 unsigned int base_hwirq;
1144 };
1145
1146 static int octeon_irq_gpio_xlat(struct irq_domain *d,
1147 struct device_node *node,
1148 const u32 *intspec,
1149 unsigned int intsize,
1150 unsigned long *out_hwirq,
1151 unsigned int *out_type)
1152 {
1153 unsigned int type;
1154 unsigned int pin;
1155 unsigned int trigger;
1156
1157 if (irq_domain_get_of_node(d) != node)
1158 return -EINVAL;
1159
1160 if (intsize < 2)
1161 return -EINVAL;
1162
1163 pin = intspec[0];
1164 if (pin >= 16)
1165 return -EINVAL;
1166
1167 trigger = intspec[1];
1168
1169 switch (trigger) {
1170 case 1:
1171 type = IRQ_TYPE_EDGE_RISING;
1172 break;
1173 case 2:
1174 type = IRQ_TYPE_EDGE_FALLING;
1175 break;
1176 case 4:
1177 type = IRQ_TYPE_LEVEL_HIGH;
1178 break;
1179 case 8:
1180 type = IRQ_TYPE_LEVEL_LOW;
1181 break;
1182 default:
1183 pr_err("Error: (%s) Invalid irq trigger specification: %x\n",
1184 node->name,
1185 trigger);
1186 type = IRQ_TYPE_LEVEL_LOW;
1187 break;
1188 }
1189 *out_type = type;
1190 *out_hwirq = pin;
1191
1192 return 0;
1193 }
1194
1195 static int octeon_irq_ciu_xlat(struct irq_domain *d,
1196 struct device_node *node,
1197 const u32 *intspec,
1198 unsigned int intsize,
1199 unsigned long *out_hwirq,
1200 unsigned int *out_type)
1201 {
1202 unsigned int ciu, bit;
1203 struct octeon_irq_ciu_domain_data *dd = d->host_data;
1204
1205 ciu = intspec[0];
1206 bit = intspec[1];
1207
1208 if (ciu >= dd->num_sum || bit > 63)
1209 return -EINVAL;
1210
1211 *out_hwirq = (ciu << 6) | bit;
1212 *out_type = 0;
1213
1214 return 0;
1215 }
1216
1217 static struct irq_chip *octeon_irq_ciu_chip;
1218 static struct irq_chip *octeon_irq_ciu_chip_edge;
1219 static struct irq_chip *octeon_irq_gpio_chip;
1220
1221 static int octeon_irq_ciu_map(struct irq_domain *d,
1222 unsigned int virq, irq_hw_number_t hw)
1223 {
1224 int rv;
1225 unsigned int line = hw >> 6;
1226 unsigned int bit = hw & 63;
1227 struct octeon_irq_ciu_domain_data *dd = d->host_data;
1228
1229 if (line >= dd->num_sum || octeon_irq_ciu_to_irq[line][bit] != 0)
1230 return -EINVAL;
1231
1232 if (line == 2) {
1233 if (octeon_irq_ciu_is_edge(line, bit))
1234 rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1235 &octeon_irq_chip_ciu_sum2_edge,
1236 handle_edge_irq);
1237 else
1238 rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1239 &octeon_irq_chip_ciu_sum2,
1240 handle_level_irq);
1241 } else {
1242 if (octeon_irq_ciu_is_edge(line, bit))
1243 rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1244 octeon_irq_ciu_chip_edge,
1245 handle_edge_irq);
1246 else
1247 rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1248 octeon_irq_ciu_chip,
1249 handle_level_irq);
1250 }
1251 return rv;
1252 }
1253
1254 static int octeon_irq_gpio_map(struct irq_domain *d,
1255 unsigned int virq, irq_hw_number_t hw)
1256 {
1257 struct octeon_irq_gpio_domain_data *gpiod = d->host_data;
1258 unsigned int line, bit;
1259 int r;
1260
1261 line = (hw + gpiod->base_hwirq) >> 6;
1262 bit = (hw + gpiod->base_hwirq) & 63;
1263 if (line >= ARRAY_SIZE(octeon_irq_ciu_to_irq) ||
1264 octeon_irq_ciu_to_irq[line][bit] != 0)
1265 return -EINVAL;
1266
1267 /*
1268 * Default to handle_level_irq. If the DT contains a different
1269 * trigger type, it will call the irq_set_type callback and
1270 * the handler gets updated.
1271 */
1272 r = octeon_irq_set_ciu_mapping(virq, line, bit, hw,
1273 octeon_irq_gpio_chip, handle_level_irq);
1274 return r;
1275 }
1276
1277 static struct irq_domain_ops octeon_irq_domain_ciu_ops = {
1278 .map = octeon_irq_ciu_map,
1279 .unmap = octeon_irq_free_cd,
1280 .xlate = octeon_irq_ciu_xlat,
1281 };
1282
1283 static struct irq_domain_ops octeon_irq_domain_gpio_ops = {
1284 .map = octeon_irq_gpio_map,
1285 .unmap = octeon_irq_free_cd,
1286 .xlate = octeon_irq_gpio_xlat,
1287 };
1288
1289 static void octeon_irq_ip2_ciu(void)
1290 {
1291 const unsigned long core_id = cvmx_get_core_num();
1292 u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(core_id * 2));
1293
1294 ciu_sum &= __this_cpu_read(octeon_irq_ciu0_en_mirror);
1295 if (likely(ciu_sum)) {
1296 int bit = fls64(ciu_sum) - 1;
1297 int irq = octeon_irq_ciu_to_irq[0][bit];
1298 if (likely(irq))
1299 do_IRQ(irq);
1300 else
1301 spurious_interrupt();
1302 } else {
1303 spurious_interrupt();
1304 }
1305 }
1306
1307 static void octeon_irq_ip3_ciu(void)
1308 {
1309 u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1);
1310
1311 ciu_sum &= __this_cpu_read(octeon_irq_ciu1_en_mirror);
1312 if (likely(ciu_sum)) {
1313 int bit = fls64(ciu_sum) - 1;
1314 int irq = octeon_irq_ciu_to_irq[1][bit];
1315 if (likely(irq))
1316 do_IRQ(irq);
1317 else
1318 spurious_interrupt();
1319 } else {
1320 spurious_interrupt();
1321 }
1322 }
1323
1324 static void octeon_irq_ip4_ciu(void)
1325 {
1326 int coreid = cvmx_get_core_num();
1327 u64 ciu_sum = cvmx_read_csr(CVMX_CIU_SUM2_PPX_IP4(coreid));
1328 u64 ciu_en = cvmx_read_csr(CVMX_CIU_EN2_PPX_IP4(coreid));
1329
1330 ciu_sum &= ciu_en;
1331 if (likely(ciu_sum)) {
1332 int bit = fls64(ciu_sum) - 1;
1333 int irq = octeon_irq_ciu_to_irq[2][bit];
1334
1335 if (likely(irq))
1336 do_IRQ(irq);
1337 else
1338 spurious_interrupt();
1339 } else {
1340 spurious_interrupt();
1341 }
1342 }
1343
1344 static bool octeon_irq_use_ip4;
1345
1346 static void octeon_irq_local_enable_ip4(void *arg)
1347 {
1348 set_c0_status(STATUSF_IP4);
1349 }
1350
1351 static void octeon_irq_ip4_mask(void)
1352 {
1353 clear_c0_status(STATUSF_IP4);
1354 spurious_interrupt();
1355 }
1356
1357 static void (*octeon_irq_ip2)(void);
1358 static void (*octeon_irq_ip3)(void);
1359 static void (*octeon_irq_ip4)(void);
1360
1361 void (*octeon_irq_setup_secondary)(void);
1362
1363 void octeon_irq_set_ip4_handler(octeon_irq_ip4_handler_t h)
1364 {
1365 octeon_irq_ip4 = h;
1366 octeon_irq_use_ip4 = true;
1367 on_each_cpu(octeon_irq_local_enable_ip4, NULL, 1);
1368 }
1369
1370 static void octeon_irq_percpu_enable(void)
1371 {
1372 irq_cpu_online();
1373 }
1374
1375 static void octeon_irq_init_ciu_percpu(void)
1376 {
1377 int coreid = cvmx_get_core_num();
1378
1379
1380 __this_cpu_write(octeon_irq_ciu0_en_mirror, 0);
1381 __this_cpu_write(octeon_irq_ciu1_en_mirror, 0);
1382 wmb();
1383 raw_spin_lock_init(this_cpu_ptr(&octeon_irq_ciu_spinlock));
1384 /*
1385 * Disable All CIU Interrupts. The ones we need will be
1386 * enabled later. Read the SUM register so we know the write
1387 * completed.
1388 */
1389 cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), 0);
1390 cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0);
1391 cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0);
1392 cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0);
1393 cvmx_read_csr(CVMX_CIU_INTX_SUM0((coreid * 2)));
1394 }
1395
1396 static void octeon_irq_init_ciu2_percpu(void)
1397 {
1398 u64 regx, ipx;
1399 int coreid = cvmx_get_core_num();
1400 u64 base = CVMX_CIU2_EN_PPX_IP2_WRKQ(coreid);
1401
1402 /*
1403 * Disable All CIU2 Interrupts. The ones we need will be
1404 * enabled later. Read the SUM register so we know the write
1405 * completed.
1406 *
1407 * There are 9 registers and 3 IPX levels with strides 0x1000
1408 * and 0x200 respectivly. Use loops to clear them.
1409 */
1410 for (regx = 0; regx <= 0x8000; regx += 0x1000) {
1411 for (ipx = 0; ipx <= 0x400; ipx += 0x200)
1412 cvmx_write_csr(base + regx + ipx, 0);
1413 }
1414
1415 cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(coreid));
1416 }
1417
1418 static void octeon_irq_setup_secondary_ciu(void)
1419 {
1420 octeon_irq_init_ciu_percpu();
1421 octeon_irq_percpu_enable();
1422
1423 /* Enable the CIU lines */
1424 set_c0_status(STATUSF_IP3 | STATUSF_IP2);
1425 if (octeon_irq_use_ip4)
1426 set_c0_status(STATUSF_IP4);
1427 else
1428 clear_c0_status(STATUSF_IP4);
1429 }
1430
1431 static void octeon_irq_setup_secondary_ciu2(void)
1432 {
1433 octeon_irq_init_ciu2_percpu();
1434 octeon_irq_percpu_enable();
1435
1436 /* Enable the CIU lines */
1437 set_c0_status(STATUSF_IP3 | STATUSF_IP2);
1438 if (octeon_irq_use_ip4)
1439 set_c0_status(STATUSF_IP4);
1440 else
1441 clear_c0_status(STATUSF_IP4);
1442 }
1443
1444 static int __init octeon_irq_init_ciu(
1445 struct device_node *ciu_node, struct device_node *parent)
1446 {
1447 unsigned int i, r;
1448 struct irq_chip *chip;
1449 struct irq_chip *chip_edge;
1450 struct irq_chip *chip_mbox;
1451 struct irq_chip *chip_wd;
1452 struct irq_domain *ciu_domain = NULL;
1453 struct octeon_irq_ciu_domain_data *dd;
1454
1455 dd = kzalloc(sizeof(*dd), GFP_KERNEL);
1456 if (!dd)
1457 return -ENOMEM;
1458
1459 octeon_irq_init_ciu_percpu();
1460 octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu;
1461
1462 octeon_irq_ip2 = octeon_irq_ip2_ciu;
1463 octeon_irq_ip3 = octeon_irq_ip3_ciu;
1464 if ((OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3())
1465 && !OCTEON_IS_MODEL(OCTEON_CN63XX)) {
1466 octeon_irq_ip4 = octeon_irq_ip4_ciu;
1467 dd->num_sum = 3;
1468 octeon_irq_use_ip4 = true;
1469 } else {
1470 octeon_irq_ip4 = octeon_irq_ip4_mask;
1471 dd->num_sum = 2;
1472 octeon_irq_use_ip4 = false;
1473 }
1474 if (OCTEON_IS_MODEL(OCTEON_CN58XX_PASS2_X) ||
1475 OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) ||
1476 OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X) ||
1477 OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3()) {
1478 chip = &octeon_irq_chip_ciu_v2;
1479 chip_edge = &octeon_irq_chip_ciu_v2_edge;
1480 chip_mbox = &octeon_irq_chip_ciu_mbox_v2;
1481 chip_wd = &octeon_irq_chip_ciu_wd_v2;
1482 octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio_v2;
1483 } else {
1484 chip = &octeon_irq_chip_ciu;
1485 chip_edge = &octeon_irq_chip_ciu_edge;
1486 chip_mbox = &octeon_irq_chip_ciu_mbox;
1487 chip_wd = &octeon_irq_chip_ciu_wd;
1488 octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio;
1489 }
1490 octeon_irq_ciu_chip = chip;
1491 octeon_irq_ciu_chip_edge = chip_edge;
1492
1493 /* Mips internal */
1494 octeon_irq_init_core();
1495
1496 ciu_domain = irq_domain_add_tree(
1497 ciu_node, &octeon_irq_domain_ciu_ops, dd);
1498 irq_set_default_host(ciu_domain);
1499
1500 /* CIU_0 */
1501 for (i = 0; i < 16; i++) {
1502 r = octeon_irq_force_ciu_mapping(
1503 ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i + 0);
1504 if (r)
1505 goto err;
1506 }
1507
1508 r = octeon_irq_set_ciu_mapping(
1509 OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq);
1510 if (r)
1511 goto err;
1512 r = octeon_irq_set_ciu_mapping(
1513 OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq);
1514 if (r)
1515 goto err;
1516
1517 for (i = 0; i < 4; i++) {
1518 r = octeon_irq_force_ciu_mapping(
1519 ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36);
1520 if (r)
1521 goto err;
1522 }
1523 for (i = 0; i < 4; i++) {
1524 r = octeon_irq_force_ciu_mapping(
1525 ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40);
1526 if (r)
1527 goto err;
1528 }
1529
1530 r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45);
1531 if (r)
1532 goto err;
1533
1534 r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46);
1535 if (r)
1536 goto err;
1537
1538 for (i = 0; i < 4; i++) {
1539 r = octeon_irq_force_ciu_mapping(
1540 ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52);
1541 if (r)
1542 goto err;
1543 }
1544
1545 r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59);
1546 if (r)
1547 goto err;
1548
1549 /* CIU_1 */
1550 for (i = 0; i < 16; i++) {
1551 r = octeon_irq_set_ciu_mapping(
1552 i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd,
1553 handle_level_irq);
1554 if (r)
1555 goto err;
1556 }
1557
1558 /* Enable the CIU lines */
1559 set_c0_status(STATUSF_IP3 | STATUSF_IP2);
1560 if (octeon_irq_use_ip4)
1561 set_c0_status(STATUSF_IP4);
1562 else
1563 clear_c0_status(STATUSF_IP4);
1564
1565 return 0;
1566 err:
1567 return r;
1568 }
1569
1570 static int __init octeon_irq_init_gpio(
1571 struct device_node *gpio_node, struct device_node *parent)
1572 {
1573 struct octeon_irq_gpio_domain_data *gpiod;
1574 u32 interrupt_cells;
1575 unsigned int base_hwirq;
1576 int r;
1577
1578 r = of_property_read_u32(parent, "#interrupt-cells", &interrupt_cells);
1579 if (r)
1580 return r;
1581
1582 if (interrupt_cells == 1) {
1583 u32 v;
1584
1585 r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v);
1586 if (r) {
1587 pr_warn("No \"interrupts\" property.\n");
1588 return r;
1589 }
1590 base_hwirq = v;
1591 } else if (interrupt_cells == 2) {
1592 u32 v0, v1;
1593
1594 r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v0);
1595 if (r) {
1596 pr_warn("No \"interrupts\" property.\n");
1597 return r;
1598 }
1599 r = of_property_read_u32_index(gpio_node, "interrupts", 1, &v1);
1600 if (r) {
1601 pr_warn("No \"interrupts\" property.\n");
1602 return r;
1603 }
1604 base_hwirq = (v0 << 6) | v1;
1605 } else {
1606 pr_warn("Bad \"#interrupt-cells\" property: %u\n",
1607 interrupt_cells);
1608 return -EINVAL;
1609 }
1610
1611 gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL);
1612 if (gpiod) {
1613 /* gpio domain host_data is the base hwirq number. */
1614 gpiod->base_hwirq = base_hwirq;
1615 irq_domain_add_linear(
1616 gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod);
1617 } else {
1618 pr_warn("Cannot allocate memory for GPIO irq_domain.\n");
1619 return -ENOMEM;
1620 }
1621
1622 /*
1623 * Clear the OF_POPULATED flag that was set by of_irq_init()
1624 * so that all GPIO devices will be probed.
1625 */
1626 of_node_clear_flag(gpio_node, OF_POPULATED);
1627
1628 return 0;
1629 }
1630 /*
1631 * Watchdog interrupts are special. They are associated with a single
1632 * core, so we hardwire the affinity to that core.
1633 */
1634 static void octeon_irq_ciu2_wd_enable(struct irq_data *data)
1635 {
1636 u64 mask;
1637 u64 en_addr;
1638 int coreid = data->irq - OCTEON_IRQ_WDOG0;
1639 struct octeon_ciu_chip_data *cd;
1640
1641 cd = irq_data_get_irq_chip_data(data);
1642 mask = 1ull << (cd->bit);
1643
1644 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
1645 (0x1000ull * cd->line);
1646 cvmx_write_csr(en_addr, mask);
1647
1648 }
1649
1650 static void octeon_irq_ciu2_enable(struct irq_data *data)
1651 {
1652 u64 mask;
1653 u64 en_addr;
1654 int cpu = next_cpu_for_irq(data);
1655 int coreid = octeon_coreid_for_cpu(cpu);
1656 struct octeon_ciu_chip_data *cd;
1657
1658 cd = irq_data_get_irq_chip_data(data);
1659 mask = 1ull << (cd->bit);
1660
1661 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
1662 (0x1000ull * cd->line);
1663 cvmx_write_csr(en_addr, mask);
1664 }
1665
1666 static void octeon_irq_ciu2_enable_local(struct irq_data *data)
1667 {
1668 u64 mask;
1669 u64 en_addr;
1670 int coreid = cvmx_get_core_num();
1671 struct octeon_ciu_chip_data *cd;
1672
1673 cd = irq_data_get_irq_chip_data(data);
1674 mask = 1ull << (cd->bit);
1675
1676 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
1677 (0x1000ull * cd->line);
1678 cvmx_write_csr(en_addr, mask);
1679
1680 }
1681
1682 static void octeon_irq_ciu2_disable_local(struct irq_data *data)
1683 {
1684 u64 mask;
1685 u64 en_addr;
1686 int coreid = cvmx_get_core_num();
1687 struct octeon_ciu_chip_data *cd;
1688
1689 cd = irq_data_get_irq_chip_data(data);
1690 mask = 1ull << (cd->bit);
1691
1692 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(coreid) +
1693 (0x1000ull * cd->line);
1694 cvmx_write_csr(en_addr, mask);
1695
1696 }
1697
1698 static void octeon_irq_ciu2_ack(struct irq_data *data)
1699 {
1700 u64 mask;
1701 u64 en_addr;
1702 int coreid = cvmx_get_core_num();
1703 struct octeon_ciu_chip_data *cd;
1704
1705 cd = irq_data_get_irq_chip_data(data);
1706 mask = 1ull << (cd->bit);
1707
1708 en_addr = CVMX_CIU2_RAW_PPX_IP2_WRKQ(coreid) + (0x1000ull * cd->line);
1709 cvmx_write_csr(en_addr, mask);
1710
1711 }
1712
1713 static void octeon_irq_ciu2_disable_all(struct irq_data *data)
1714 {
1715 int cpu;
1716 u64 mask;
1717 struct octeon_ciu_chip_data *cd;
1718
1719 cd = irq_data_get_irq_chip_data(data);
1720 mask = 1ull << (cd->bit);
1721
1722 for_each_online_cpu(cpu) {
1723 u64 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
1724 octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line);
1725 cvmx_write_csr(en_addr, mask);
1726 }
1727 }
1728
1729 static void octeon_irq_ciu2_mbox_enable_all(struct irq_data *data)
1730 {
1731 int cpu;
1732 u64 mask;
1733
1734 mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1735
1736 for_each_online_cpu(cpu) {
1737 u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(
1738 octeon_coreid_for_cpu(cpu));
1739 cvmx_write_csr(en_addr, mask);
1740 }
1741 }
1742
1743 static void octeon_irq_ciu2_mbox_disable_all(struct irq_data *data)
1744 {
1745 int cpu;
1746 u64 mask;
1747
1748 mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1749
1750 for_each_online_cpu(cpu) {
1751 u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(
1752 octeon_coreid_for_cpu(cpu));
1753 cvmx_write_csr(en_addr, mask);
1754 }
1755 }
1756
1757 static void octeon_irq_ciu2_mbox_enable_local(struct irq_data *data)
1758 {
1759 u64 mask;
1760 u64 en_addr;
1761 int coreid = cvmx_get_core_num();
1762
1763 mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1764 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(coreid);
1765 cvmx_write_csr(en_addr, mask);
1766 }
1767
1768 static void octeon_irq_ciu2_mbox_disable_local(struct irq_data *data)
1769 {
1770 u64 mask;
1771 u64 en_addr;
1772 int coreid = cvmx_get_core_num();
1773
1774 mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1775 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(coreid);
1776 cvmx_write_csr(en_addr, mask);
1777 }
1778
1779 #ifdef CONFIG_SMP
1780 static int octeon_irq_ciu2_set_affinity(struct irq_data *data,
1781 const struct cpumask *dest, bool force)
1782 {
1783 int cpu;
1784 bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
1785 u64 mask;
1786 struct octeon_ciu_chip_data *cd;
1787
1788 if (!enable_one)
1789 return 0;
1790
1791 cd = irq_data_get_irq_chip_data(data);
1792 mask = 1ull << cd->bit;
1793
1794 for_each_online_cpu(cpu) {
1795 u64 en_addr;
1796 if (cpumask_test_cpu(cpu, dest) && enable_one) {
1797 enable_one = false;
1798 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(
1799 octeon_coreid_for_cpu(cpu)) +
1800 (0x1000ull * cd->line);
1801 } else {
1802 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
1803 octeon_coreid_for_cpu(cpu)) +
1804 (0x1000ull * cd->line);
1805 }
1806 cvmx_write_csr(en_addr, mask);
1807 }
1808
1809 return 0;
1810 }
1811 #endif
1812
1813 static void octeon_irq_ciu2_enable_gpio(struct irq_data *data)
1814 {
1815 octeon_irq_gpio_setup(data);
1816 octeon_irq_ciu2_enable(data);
1817 }
1818
1819 static void octeon_irq_ciu2_disable_gpio(struct irq_data *data)
1820 {
1821 struct octeon_ciu_chip_data *cd;
1822
1823 cd = irq_data_get_irq_chip_data(data);
1824
1825 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
1826
1827 octeon_irq_ciu2_disable_all(data);
1828 }
1829
1830 static struct irq_chip octeon_irq_chip_ciu2 = {
1831 .name = "CIU2-E",
1832 .irq_enable = octeon_irq_ciu2_enable,
1833 .irq_disable = octeon_irq_ciu2_disable_all,
1834 .irq_mask = octeon_irq_ciu2_disable_local,
1835 .irq_unmask = octeon_irq_ciu2_enable,
1836 #ifdef CONFIG_SMP
1837 .irq_set_affinity = octeon_irq_ciu2_set_affinity,
1838 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1839 #endif
1840 };
1841
1842 static struct irq_chip octeon_irq_chip_ciu2_edge = {
1843 .name = "CIU2-E",
1844 .irq_enable = octeon_irq_ciu2_enable,
1845 .irq_disable = octeon_irq_ciu2_disable_all,
1846 .irq_ack = octeon_irq_ciu2_ack,
1847 .irq_mask = octeon_irq_ciu2_disable_local,
1848 .irq_unmask = octeon_irq_ciu2_enable,
1849 #ifdef CONFIG_SMP
1850 .irq_set_affinity = octeon_irq_ciu2_set_affinity,
1851 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1852 #endif
1853 };
1854
1855 static struct irq_chip octeon_irq_chip_ciu2_mbox = {
1856 .name = "CIU2-M",
1857 .irq_enable = octeon_irq_ciu2_mbox_enable_all,
1858 .irq_disable = octeon_irq_ciu2_mbox_disable_all,
1859 .irq_ack = octeon_irq_ciu2_mbox_disable_local,
1860 .irq_eoi = octeon_irq_ciu2_mbox_enable_local,
1861
1862 .irq_cpu_online = octeon_irq_ciu2_mbox_enable_local,
1863 .irq_cpu_offline = octeon_irq_ciu2_mbox_disable_local,
1864 .flags = IRQCHIP_ONOFFLINE_ENABLED,
1865 };
1866
1867 static struct irq_chip octeon_irq_chip_ciu2_wd = {
1868 .name = "CIU2-W",
1869 .irq_enable = octeon_irq_ciu2_wd_enable,
1870 .irq_disable = octeon_irq_ciu2_disable_all,
1871 .irq_mask = octeon_irq_ciu2_disable_local,
1872 .irq_unmask = octeon_irq_ciu2_enable_local,
1873 };
1874
1875 static struct irq_chip octeon_irq_chip_ciu2_gpio = {
1876 .name = "CIU-GPIO",
1877 .irq_enable = octeon_irq_ciu2_enable_gpio,
1878 .irq_disable = octeon_irq_ciu2_disable_gpio,
1879 .irq_ack = octeon_irq_ciu_gpio_ack,
1880 .irq_mask = octeon_irq_ciu2_disable_local,
1881 .irq_unmask = octeon_irq_ciu2_enable,
1882 .irq_set_type = octeon_irq_ciu_gpio_set_type,
1883 #ifdef CONFIG_SMP
1884 .irq_set_affinity = octeon_irq_ciu2_set_affinity,
1885 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1886 #endif
1887 .flags = IRQCHIP_SET_TYPE_MASKED,
1888 };
1889
1890 static int octeon_irq_ciu2_xlat(struct irq_domain *d,
1891 struct device_node *node,
1892 const u32 *intspec,
1893 unsigned int intsize,
1894 unsigned long *out_hwirq,
1895 unsigned int *out_type)
1896 {
1897 unsigned int ciu, bit;
1898
1899 ciu = intspec[0];
1900 bit = intspec[1];
1901
1902 *out_hwirq = (ciu << 6) | bit;
1903 *out_type = 0;
1904
1905 return 0;
1906 }
1907
1908 static bool octeon_irq_ciu2_is_edge(unsigned int line, unsigned int bit)
1909 {
1910 bool edge = false;
1911
1912 if (line == 3) /* MIO */
1913 switch (bit) {
1914 case 2: /* IPD_DRP */
1915 case 8 ... 11: /* Timers */
1916 case 48: /* PTP */
1917 edge = true;
1918 break;
1919 default:
1920 break;
1921 }
1922 else if (line == 6) /* PKT */
1923 switch (bit) {
1924 case 52 ... 53: /* ILK_DRP */
1925 case 8 ... 12: /* GMX_DRP */
1926 edge = true;
1927 break;
1928 default:
1929 break;
1930 }
1931 return edge;
1932 }
1933
1934 static int octeon_irq_ciu2_map(struct irq_domain *d,
1935 unsigned int virq, irq_hw_number_t hw)
1936 {
1937 unsigned int line = hw >> 6;
1938 unsigned int bit = hw & 63;
1939
1940 /*
1941 * Don't map irq if it is reserved for GPIO.
1942 * (Line 7 are the GPIO lines.)
1943 */
1944 if (line == 7)
1945 return 0;
1946
1947 if (line > 7 || octeon_irq_ciu_to_irq[line][bit] != 0)
1948 return -EINVAL;
1949
1950 if (octeon_irq_ciu2_is_edge(line, bit))
1951 octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1952 &octeon_irq_chip_ciu2_edge,
1953 handle_edge_irq);
1954 else
1955 octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1956 &octeon_irq_chip_ciu2,
1957 handle_level_irq);
1958
1959 return 0;
1960 }
1961
1962 static struct irq_domain_ops octeon_irq_domain_ciu2_ops = {
1963 .map = octeon_irq_ciu2_map,
1964 .unmap = octeon_irq_free_cd,
1965 .xlate = octeon_irq_ciu2_xlat,
1966 };
1967
1968 static void octeon_irq_ciu2(void)
1969 {
1970 int line;
1971 int bit;
1972 int irq;
1973 u64 src_reg, src, sum;
1974 const unsigned long core_id = cvmx_get_core_num();
1975
1976 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(core_id)) & 0xfful;
1977
1978 if (unlikely(!sum))
1979 goto spurious;
1980
1981 line = fls64(sum) - 1;
1982 src_reg = CVMX_CIU2_SRC_PPX_IP2_WRKQ(core_id) + (0x1000 * line);
1983 src = cvmx_read_csr(src_reg);
1984
1985 if (unlikely(!src))
1986 goto spurious;
1987
1988 bit = fls64(src) - 1;
1989 irq = octeon_irq_ciu_to_irq[line][bit];
1990 if (unlikely(!irq))
1991 goto spurious;
1992
1993 do_IRQ(irq);
1994 goto out;
1995
1996 spurious:
1997 spurious_interrupt();
1998 out:
1999 /* CN68XX pass 1.x has an errata that accessing the ACK registers
2000 can stop interrupts from propagating */
2001 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
2002 cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
2003 else
2004 cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP2(core_id));
2005 return;
2006 }
2007
2008 static void octeon_irq_ciu2_mbox(void)
2009 {
2010 int line;
2011
2012 const unsigned long core_id = cvmx_get_core_num();
2013 u64 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP3(core_id)) >> 60;
2014
2015 if (unlikely(!sum))
2016 goto spurious;
2017
2018 line = fls64(sum) - 1;
2019
2020 do_IRQ(OCTEON_IRQ_MBOX0 + line);
2021 goto out;
2022
2023 spurious:
2024 spurious_interrupt();
2025 out:
2026 /* CN68XX pass 1.x has an errata that accessing the ACK registers
2027 can stop interrupts from propagating */
2028 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
2029 cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
2030 else
2031 cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP3(core_id));
2032 return;
2033 }
2034
2035 static int __init octeon_irq_init_ciu2(
2036 struct device_node *ciu_node, struct device_node *parent)
2037 {
2038 unsigned int i, r;
2039 struct irq_domain *ciu_domain = NULL;
2040
2041 octeon_irq_init_ciu2_percpu();
2042 octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu2;
2043
2044 octeon_irq_gpio_chip = &octeon_irq_chip_ciu2_gpio;
2045 octeon_irq_ip2 = octeon_irq_ciu2;
2046 octeon_irq_ip3 = octeon_irq_ciu2_mbox;
2047 octeon_irq_ip4 = octeon_irq_ip4_mask;
2048
2049 /* Mips internal */
2050 octeon_irq_init_core();
2051
2052 ciu_domain = irq_domain_add_tree(
2053 ciu_node, &octeon_irq_domain_ciu2_ops, NULL);
2054 irq_set_default_host(ciu_domain);
2055
2056 /* CUI2 */
2057 for (i = 0; i < 64; i++) {
2058 r = octeon_irq_force_ciu_mapping(
2059 ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i);
2060 if (r)
2061 goto err;
2062 }
2063
2064 for (i = 0; i < 32; i++) {
2065 r = octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i, 0,
2066 &octeon_irq_chip_ciu2_wd, handle_level_irq);
2067 if (r)
2068 goto err;
2069 }
2070
2071 for (i = 0; i < 4; i++) {
2072 r = octeon_irq_force_ciu_mapping(
2073 ciu_domain, i + OCTEON_IRQ_TIMER0, 3, i + 8);
2074 if (r)
2075 goto err;
2076 }
2077
2078 for (i = 0; i < 4; i++) {
2079 r = octeon_irq_force_ciu_mapping(
2080 ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i);
2081 if (r)
2082 goto err;
2083 }
2084
2085 for (i = 0; i < 4; i++) {
2086 r = octeon_irq_force_ciu_mapping(
2087 ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 4, i + 8);
2088 if (r)
2089 goto err;
2090 }
2091
2092 irq_set_chip_and_handler(OCTEON_IRQ_MBOX0, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2093 irq_set_chip_and_handler(OCTEON_IRQ_MBOX1, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2094 irq_set_chip_and_handler(OCTEON_IRQ_MBOX2, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2095 irq_set_chip_and_handler(OCTEON_IRQ_MBOX3, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2096
2097 /* Enable the CIU lines */
2098 set_c0_status(STATUSF_IP3 | STATUSF_IP2);
2099 clear_c0_status(STATUSF_IP4);
2100 return 0;
2101 err:
2102 return r;
2103 }
2104
2105 struct octeon_irq_cib_host_data {
2106 raw_spinlock_t lock;
2107 u64 raw_reg;
2108 u64 en_reg;
2109 int max_bits;
2110 };
2111
2112 struct octeon_irq_cib_chip_data {
2113 struct octeon_irq_cib_host_data *host_data;
2114 int bit;
2115 };
2116
2117 static void octeon_irq_cib_enable(struct irq_data *data)
2118 {
2119 unsigned long flags;
2120 u64 en;
2121 struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
2122 struct octeon_irq_cib_host_data *host_data = cd->host_data;
2123
2124 raw_spin_lock_irqsave(&host_data->lock, flags);
2125 en = cvmx_read_csr(host_data->en_reg);
2126 en |= 1ull << cd->bit;
2127 cvmx_write_csr(host_data->en_reg, en);
2128 raw_spin_unlock_irqrestore(&host_data->lock, flags);
2129 }
2130
2131 static void octeon_irq_cib_disable(struct irq_data *data)
2132 {
2133 unsigned long flags;
2134 u64 en;
2135 struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
2136 struct octeon_irq_cib_host_data *host_data = cd->host_data;
2137
2138 raw_spin_lock_irqsave(&host_data->lock, flags);
2139 en = cvmx_read_csr(host_data->en_reg);
2140 en &= ~(1ull << cd->bit);
2141 cvmx_write_csr(host_data->en_reg, en);
2142 raw_spin_unlock_irqrestore(&host_data->lock, flags);
2143 }
2144
2145 static int octeon_irq_cib_set_type(struct irq_data *data, unsigned int t)
2146 {
2147 irqd_set_trigger_type(data, t);
2148 return IRQ_SET_MASK_OK;
2149 }
2150
2151 static struct irq_chip octeon_irq_chip_cib = {
2152 .name = "CIB",
2153 .irq_enable = octeon_irq_cib_enable,
2154 .irq_disable = octeon_irq_cib_disable,
2155 .irq_mask = octeon_irq_cib_disable,
2156 .irq_unmask = octeon_irq_cib_enable,
2157 .irq_set_type = octeon_irq_cib_set_type,
2158 };
2159
2160 static int octeon_irq_cib_xlat(struct irq_domain *d,
2161 struct device_node *node,
2162 const u32 *intspec,
2163 unsigned int intsize,
2164 unsigned long *out_hwirq,
2165 unsigned int *out_type)
2166 {
2167 unsigned int type = 0;
2168
2169 if (intsize == 2)
2170 type = intspec[1];
2171
2172 switch (type) {
2173 case 0: /* unofficial value, but we might as well let it work. */
2174 case 4: /* official value for level triggering. */
2175 *out_type = IRQ_TYPE_LEVEL_HIGH;
2176 break;
2177 case 1: /* official value for edge triggering. */
2178 *out_type = IRQ_TYPE_EDGE_RISING;
2179 break;
2180 default: /* Nothing else is acceptable. */
2181 return -EINVAL;
2182 }
2183
2184 *out_hwirq = intspec[0];
2185
2186 return 0;
2187 }
2188
2189 static int octeon_irq_cib_map(struct irq_domain *d,
2190 unsigned int virq, irq_hw_number_t hw)
2191 {
2192 struct octeon_irq_cib_host_data *host_data = d->host_data;
2193 struct octeon_irq_cib_chip_data *cd;
2194
2195 if (hw >= host_data->max_bits) {
2196 pr_err("ERROR: %s mapping %u is to big!\n",
2197 irq_domain_get_of_node(d)->name, (unsigned)hw);
2198 return -EINVAL;
2199 }
2200
2201 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
2202 cd->host_data = host_data;
2203 cd->bit = hw;
2204
2205 irq_set_chip_and_handler(virq, &octeon_irq_chip_cib,
2206 handle_simple_irq);
2207 irq_set_chip_data(virq, cd);
2208 return 0;
2209 }
2210
2211 static struct irq_domain_ops octeon_irq_domain_cib_ops = {
2212 .map = octeon_irq_cib_map,
2213 .unmap = octeon_irq_free_cd,
2214 .xlate = octeon_irq_cib_xlat,
2215 };
2216
2217 /* Chain to real handler. */
2218 static irqreturn_t octeon_irq_cib_handler(int my_irq, void *data)
2219 {
2220 u64 en;
2221 u64 raw;
2222 u64 bits;
2223 int i;
2224 int irq;
2225 struct irq_domain *cib_domain = data;
2226 struct octeon_irq_cib_host_data *host_data = cib_domain->host_data;
2227
2228 en = cvmx_read_csr(host_data->en_reg);
2229 raw = cvmx_read_csr(host_data->raw_reg);
2230
2231 bits = en & raw;
2232
2233 for (i = 0; i < host_data->max_bits; i++) {
2234 if ((bits & 1ull << i) == 0)
2235 continue;
2236 irq = irq_find_mapping(cib_domain, i);
2237 if (!irq) {
2238 unsigned long flags;
2239
2240 pr_err("ERROR: CIB bit %d@%llx IRQ unhandled, disabling\n",
2241 i, host_data->raw_reg);
2242 raw_spin_lock_irqsave(&host_data->lock, flags);
2243 en = cvmx_read_csr(host_data->en_reg);
2244 en &= ~(1ull << i);
2245 cvmx_write_csr(host_data->en_reg, en);
2246 cvmx_write_csr(host_data->raw_reg, 1ull << i);
2247 raw_spin_unlock_irqrestore(&host_data->lock, flags);
2248 } else {
2249 struct irq_desc *desc = irq_to_desc(irq);
2250 struct irq_data *irq_data = irq_desc_get_irq_data(desc);
2251 /* If edge, acknowledge the bit we will be sending. */
2252 if (irqd_get_trigger_type(irq_data) &
2253 IRQ_TYPE_EDGE_BOTH)
2254 cvmx_write_csr(host_data->raw_reg, 1ull << i);
2255 generic_handle_irq_desc(desc);
2256 }
2257 }
2258
2259 return IRQ_HANDLED;
2260 }
2261
2262 static int __init octeon_irq_init_cib(struct device_node *ciu_node,
2263 struct device_node *parent)
2264 {
2265 const __be32 *addr;
2266 u32 val;
2267 struct octeon_irq_cib_host_data *host_data;
2268 int parent_irq;
2269 int r;
2270 struct irq_domain *cib_domain;
2271
2272 parent_irq = irq_of_parse_and_map(ciu_node, 0);
2273 if (!parent_irq) {
2274 pr_err("ERROR: Couldn't acquire parent_irq for %s\n.",
2275 ciu_node->name);
2276 return -EINVAL;
2277 }
2278
2279 host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
2280 raw_spin_lock_init(&host_data->lock);
2281
2282 addr = of_get_address(ciu_node, 0, NULL, NULL);
2283 if (!addr) {
2284 pr_err("ERROR: Couldn't acquire reg(0) %s\n.", ciu_node->name);
2285 return -EINVAL;
2286 }
2287 host_data->raw_reg = (u64)phys_to_virt(
2288 of_translate_address(ciu_node, addr));
2289
2290 addr = of_get_address(ciu_node, 1, NULL, NULL);
2291 if (!addr) {
2292 pr_err("ERROR: Couldn't acquire reg(1) %s\n.", ciu_node->name);
2293 return -EINVAL;
2294 }
2295 host_data->en_reg = (u64)phys_to_virt(
2296 of_translate_address(ciu_node, addr));
2297
2298 r = of_property_read_u32(ciu_node, "cavium,max-bits", &val);
2299 if (r) {
2300 pr_err("ERROR: Couldn't read cavium,max-bits from %s\n.",
2301 ciu_node->name);
2302 return r;
2303 }
2304 host_data->max_bits = val;
2305
2306 cib_domain = irq_domain_add_linear(ciu_node, host_data->max_bits,
2307 &octeon_irq_domain_cib_ops,
2308 host_data);
2309 if (!cib_domain) {
2310 pr_err("ERROR: Couldn't irq_domain_add_linear()\n.");
2311 return -ENOMEM;
2312 }
2313
2314 cvmx_write_csr(host_data->en_reg, 0); /* disable all IRQs */
2315 cvmx_write_csr(host_data->raw_reg, ~0); /* ack any outstanding */
2316
2317 r = request_irq(parent_irq, octeon_irq_cib_handler,
2318 IRQF_NO_THREAD, "cib", cib_domain);
2319 if (r) {
2320 pr_err("request_irq cib failed %d\n", r);
2321 return r;
2322 }
2323 pr_info("CIB interrupt controller probed: %llx %d\n",
2324 host_data->raw_reg, host_data->max_bits);
2325 return 0;
2326 }
2327
2328 int octeon_irq_ciu3_xlat(struct irq_domain *d,
2329 struct device_node *node,
2330 const u32 *intspec,
2331 unsigned int intsize,
2332 unsigned long *out_hwirq,
2333 unsigned int *out_type)
2334 {
2335 struct octeon_ciu3_info *ciu3_info = d->host_data;
2336 unsigned int hwirq, type, intsn_major;
2337 union cvmx_ciu3_iscx_ctl isc;
2338
2339 if (intsize < 2)
2340 return -EINVAL;
2341 hwirq = intspec[0];
2342 type = intspec[1];
2343
2344 if (hwirq >= (1 << 20))
2345 return -EINVAL;
2346
2347 intsn_major = hwirq >> 12;
2348 switch (intsn_major) {
2349 case 0x04: /* Software handled separately. */
2350 return -EINVAL;
2351 default:
2352 break;
2353 }
2354
2355 isc.u64 = cvmx_read_csr(ciu3_info->ciu3_addr + CIU3_ISC_CTL(hwirq));
2356 if (!isc.s.imp)
2357 return -EINVAL;
2358
2359 switch (type) {
2360 case 4: /* official value for level triggering. */
2361 *out_type = IRQ_TYPE_LEVEL_HIGH;
2362 break;
2363 case 0: /* unofficial value, but we might as well let it work. */
2364 case 1: /* official value for edge triggering. */
2365 *out_type = IRQ_TYPE_EDGE_RISING;
2366 break;
2367 default: /* Nothing else is acceptable. */
2368 return -EINVAL;
2369 }
2370
2371 *out_hwirq = hwirq;
2372
2373 return 0;
2374 }
2375
2376 void octeon_irq_ciu3_enable(struct irq_data *data)
2377 {
2378 int cpu;
2379 union cvmx_ciu3_iscx_ctl isc_ctl;
2380 union cvmx_ciu3_iscx_w1c isc_w1c;
2381 u64 isc_ctl_addr;
2382
2383 struct octeon_ciu_chip_data *cd;
2384
2385 cpu = next_cpu_for_irq(data);
2386
2387 cd = irq_data_get_irq_chip_data(data);
2388
2389 isc_w1c.u64 = 0;
2390 isc_w1c.s.en = 1;
2391 cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2392
2393 isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2394 isc_ctl.u64 = 0;
2395 isc_ctl.s.en = 1;
2396 isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
2397 cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2398 cvmx_read_csr(isc_ctl_addr);
2399 }
2400
2401 void octeon_irq_ciu3_disable(struct irq_data *data)
2402 {
2403 u64 isc_ctl_addr;
2404 union cvmx_ciu3_iscx_w1c isc_w1c;
2405
2406 struct octeon_ciu_chip_data *cd;
2407
2408 cd = irq_data_get_irq_chip_data(data);
2409
2410 isc_w1c.u64 = 0;
2411 isc_w1c.s.en = 1;
2412
2413 isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2414 cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2415 cvmx_write_csr(isc_ctl_addr, 0);
2416 cvmx_read_csr(isc_ctl_addr);
2417 }
2418
2419 void octeon_irq_ciu3_ack(struct irq_data *data)
2420 {
2421 u64 isc_w1c_addr;
2422 union cvmx_ciu3_iscx_w1c isc_w1c;
2423 struct octeon_ciu_chip_data *cd;
2424 u32 trigger_type = irqd_get_trigger_type(data);
2425
2426 /*
2427 * We use a single irq_chip, so we have to do nothing to ack a
2428 * level interrupt.
2429 */
2430 if (!(trigger_type & IRQ_TYPE_EDGE_BOTH))
2431 return;
2432
2433 cd = irq_data_get_irq_chip_data(data);
2434
2435 isc_w1c.u64 = 0;
2436 isc_w1c.s.raw = 1;
2437
2438 isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2439 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2440 cvmx_read_csr(isc_w1c_addr);
2441 }
2442
2443 void octeon_irq_ciu3_mask(struct irq_data *data)
2444 {
2445 union cvmx_ciu3_iscx_w1c isc_w1c;
2446 u64 isc_w1c_addr;
2447 struct octeon_ciu_chip_data *cd;
2448
2449 cd = irq_data_get_irq_chip_data(data);
2450
2451 isc_w1c.u64 = 0;
2452 isc_w1c.s.en = 1;
2453
2454 isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2455 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2456 cvmx_read_csr(isc_w1c_addr);
2457 }
2458
2459 void octeon_irq_ciu3_mask_ack(struct irq_data *data)
2460 {
2461 union cvmx_ciu3_iscx_w1c isc_w1c;
2462 u64 isc_w1c_addr;
2463 struct octeon_ciu_chip_data *cd;
2464 u32 trigger_type = irqd_get_trigger_type(data);
2465
2466 cd = irq_data_get_irq_chip_data(data);
2467
2468 isc_w1c.u64 = 0;
2469 isc_w1c.s.en = 1;
2470
2471 /*
2472 * We use a single irq_chip, so only ack an edge (!level)
2473 * interrupt.
2474 */
2475 if (trigger_type & IRQ_TYPE_EDGE_BOTH)
2476 isc_w1c.s.raw = 1;
2477
2478 isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2479 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2480 cvmx_read_csr(isc_w1c_addr);
2481 }
2482
2483 #ifdef CONFIG_SMP
2484 int octeon_irq_ciu3_set_affinity(struct irq_data *data,
2485 const struct cpumask *dest, bool force)
2486 {
2487 union cvmx_ciu3_iscx_ctl isc_ctl;
2488 union cvmx_ciu3_iscx_w1c isc_w1c;
2489 u64 isc_ctl_addr;
2490 int cpu;
2491 bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
2492 struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
2493
2494 if (!cpumask_subset(dest, cpumask_of_node(cd->ciu_node)))
2495 return -EINVAL;
2496
2497 if (!enable_one)
2498 return IRQ_SET_MASK_OK;
2499
2500 cd = irq_data_get_irq_chip_data(data);
2501 cpu = cpumask_first(dest);
2502 if (cpu >= nr_cpu_ids)
2503 cpu = smp_processor_id();
2504 cd->current_cpu = cpu;
2505
2506 isc_w1c.u64 = 0;
2507 isc_w1c.s.en = 1;
2508 cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2509
2510 isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2511 isc_ctl.u64 = 0;
2512 isc_ctl.s.en = 1;
2513 isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
2514 cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2515 cvmx_read_csr(isc_ctl_addr);
2516
2517 return IRQ_SET_MASK_OK;
2518 }
2519 #endif
2520
2521 static struct irq_chip octeon_irq_chip_ciu3 = {
2522 .name = "CIU3",
2523 .irq_startup = edge_startup,
2524 .irq_enable = octeon_irq_ciu3_enable,
2525 .irq_disable = octeon_irq_ciu3_disable,
2526 .irq_ack = octeon_irq_ciu3_ack,
2527 .irq_mask = octeon_irq_ciu3_mask,
2528 .irq_mask_ack = octeon_irq_ciu3_mask_ack,
2529 .irq_unmask = octeon_irq_ciu3_enable,
2530 .irq_set_type = octeon_irq_ciu_set_type,
2531 #ifdef CONFIG_SMP
2532 .irq_set_affinity = octeon_irq_ciu3_set_affinity,
2533 .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
2534 #endif
2535 };
2536
2537 int octeon_irq_ciu3_mapx(struct irq_domain *d, unsigned int virq,
2538 irq_hw_number_t hw, struct irq_chip *chip)
2539 {
2540 struct octeon_ciu3_info *ciu3_info = d->host_data;
2541 struct octeon_ciu_chip_data *cd = kzalloc_node(sizeof(*cd), GFP_KERNEL,
2542 ciu3_info->node);
2543 if (!cd)
2544 return -ENOMEM;
2545 cd->intsn = hw;
2546 cd->current_cpu = -1;
2547 cd->ciu3_addr = ciu3_info->ciu3_addr;
2548 cd->ciu_node = ciu3_info->node;
2549 irq_set_chip_and_handler(virq, chip, handle_edge_irq);
2550 irq_set_chip_data(virq, cd);
2551
2552 return 0;
2553 }
2554
2555 static int octeon_irq_ciu3_map(struct irq_domain *d,
2556 unsigned int virq, irq_hw_number_t hw)
2557 {
2558 return octeon_irq_ciu3_mapx(d, virq, hw, &octeon_irq_chip_ciu3);
2559 }
2560
2561 static struct irq_domain_ops octeon_dflt_domain_ciu3_ops = {
2562 .map = octeon_irq_ciu3_map,
2563 .unmap = octeon_irq_free_cd,
2564 .xlate = octeon_irq_ciu3_xlat,
2565 };
2566
2567 static void octeon_irq_ciu3_ip2(void)
2568 {
2569 union cvmx_ciu3_destx_pp_int dest_pp_int;
2570 struct octeon_ciu3_info *ciu3_info;
2571 u64 ciu3_addr;
2572
2573 ciu3_info = __this_cpu_read(octeon_ciu3_info);
2574 ciu3_addr = ciu3_info->ciu3_addr;
2575
2576 dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(3 * cvmx_get_local_core_num()));
2577
2578 if (likely(dest_pp_int.s.intr)) {
2579 irq_hw_number_t intsn = dest_pp_int.s.intsn;
2580 irq_hw_number_t hw;
2581 struct irq_domain *domain;
2582 /* Get the domain to use from the major block */
2583 int block = intsn >> 12;
2584 int ret;
2585
2586 domain = ciu3_info->domain[block];
2587 if (ciu3_info->intsn2hw[block])
2588 hw = ciu3_info->intsn2hw[block](domain, intsn);
2589 else
2590 hw = intsn;
2591
2592 ret = handle_domain_irq(domain, hw, NULL);
2593 if (ret < 0) {
2594 union cvmx_ciu3_iscx_w1c isc_w1c;
2595 u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);
2596
2597 isc_w1c.u64 = 0;
2598 isc_w1c.s.en = 1;
2599 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2600 cvmx_read_csr(isc_w1c_addr);
2601 spurious_interrupt();
2602 }
2603 } else {
2604 spurious_interrupt();
2605 }
2606 }
2607
2608 /*
2609 * 10 mbox per core starting from zero.
2610 * Base mbox is core * 10
2611 */
2612 static unsigned int octeon_irq_ciu3_base_mbox_intsn(int core)
2613 {
2614 /* SW (mbox) are 0x04 in bits 12..19 */
2615 return 0x04000 + CIU3_MBOX_PER_CORE * core;
2616 }
2617
2618 static unsigned int octeon_irq_ciu3_mbox_intsn_for_core(int core, unsigned int mbox)
2619 {
2620 return octeon_irq_ciu3_base_mbox_intsn(core) + mbox;
2621 }
2622
2623 static unsigned int octeon_irq_ciu3_mbox_intsn_for_cpu(int cpu, unsigned int mbox)
2624 {
2625 int local_core = octeon_coreid_for_cpu(cpu) & 0x3f;
2626
2627 return octeon_irq_ciu3_mbox_intsn_for_core(local_core, mbox);
2628 }
2629
2630 static void octeon_irq_ciu3_mbox(void)
2631 {
2632 union cvmx_ciu3_destx_pp_int dest_pp_int;
2633 struct octeon_ciu3_info *ciu3_info;
2634 u64 ciu3_addr;
2635 int core = cvmx_get_local_core_num();
2636
2637 ciu3_info = __this_cpu_read(octeon_ciu3_info);
2638 ciu3_addr = ciu3_info->ciu3_addr;
2639
2640 dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(1 + 3 * core));
2641
2642 if (likely(dest_pp_int.s.intr)) {
2643 irq_hw_number_t intsn = dest_pp_int.s.intsn;
2644 int mbox = intsn - octeon_irq_ciu3_base_mbox_intsn(core);
2645
2646 if (likely(mbox >= 0 && mbox < CIU3_MBOX_PER_CORE)) {
2647 do_IRQ(mbox + OCTEON_IRQ_MBOX0);
2648 } else {
2649 union cvmx_ciu3_iscx_w1c isc_w1c;
2650 u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);
2651
2652 isc_w1c.u64 = 0;
2653 isc_w1c.s.en = 1;
2654 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2655 cvmx_read_csr(isc_w1c_addr);
2656 spurious_interrupt();
2657 }
2658 } else {
2659 spurious_interrupt();
2660 }
2661 }
2662
2663 void octeon_ciu3_mbox_send(int cpu, unsigned int mbox)
2664 {
2665 struct octeon_ciu3_info *ciu3_info;
2666 unsigned int intsn;
2667 union cvmx_ciu3_iscx_w1s isc_w1s;
2668 u64 isc_w1s_addr;
2669
2670 if (WARN_ON_ONCE(mbox >= CIU3_MBOX_PER_CORE))
2671 return;
2672
2673 intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
2674 ciu3_info = per_cpu(octeon_ciu3_info, cpu);
2675 isc_w1s_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1S(intsn);
2676
2677 isc_w1s.u64 = 0;
2678 isc_w1s.s.raw = 1;
2679
2680 cvmx_write_csr(isc_w1s_addr, isc_w1s.u64);
2681 cvmx_read_csr(isc_w1s_addr);
2682 }
2683
2684 static void octeon_irq_ciu3_mbox_set_enable(struct irq_data *data, int cpu, bool en)
2685 {
2686 struct octeon_ciu3_info *ciu3_info;
2687 unsigned int intsn;
2688 u64 isc_ctl_addr, isc_w1c_addr;
2689 union cvmx_ciu3_iscx_ctl isc_ctl;
2690 unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2691
2692 intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
2693 ciu3_info = per_cpu(octeon_ciu3_info, cpu);
2694 isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
2695 isc_ctl_addr = ciu3_info->ciu3_addr + CIU3_ISC_CTL(intsn);
2696
2697 isc_ctl.u64 = 0;
2698 isc_ctl.s.en = 1;
2699
2700 cvmx_write_csr(isc_w1c_addr, isc_ctl.u64);
2701 cvmx_write_csr(isc_ctl_addr, 0);
2702 if (en) {
2703 unsigned int idt = per_cpu(octeon_irq_ciu3_idt_ip3, cpu);
2704
2705 isc_ctl.u64 = 0;
2706 isc_ctl.s.en = 1;
2707 isc_ctl.s.idt = idt;
2708 cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2709 }
2710 cvmx_read_csr(isc_ctl_addr);
2711 }
2712
2713 static void octeon_irq_ciu3_mbox_enable(struct irq_data *data)
2714 {
2715 int cpu;
2716 unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2717
2718 WARN_ON(mbox >= CIU3_MBOX_PER_CORE);
2719
2720 for_each_online_cpu(cpu)
2721 octeon_irq_ciu3_mbox_set_enable(data, cpu, true);
2722 }
2723
2724 static void octeon_irq_ciu3_mbox_disable(struct irq_data *data)
2725 {
2726 int cpu;
2727 unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2728
2729 WARN_ON(mbox >= CIU3_MBOX_PER_CORE);
2730
2731 for_each_online_cpu(cpu)
2732 octeon_irq_ciu3_mbox_set_enable(data, cpu, false);
2733 }
2734
2735 static void octeon_irq_ciu3_mbox_ack(struct irq_data *data)
2736 {
2737 struct octeon_ciu3_info *ciu3_info;
2738 unsigned int intsn;
2739 u64 isc_w1c_addr;
2740 union cvmx_ciu3_iscx_w1c isc_w1c;
2741 unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2742
2743 intsn = octeon_irq_ciu3_mbox_intsn_for_core(cvmx_get_local_core_num(), mbox);
2744
2745 isc_w1c.u64 = 0;
2746 isc_w1c.s.raw = 1;
2747
2748 ciu3_info = __this_cpu_read(octeon_ciu3_info);
2749 isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
2750 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2751 cvmx_read_csr(isc_w1c_addr);
2752 }
2753
2754 static void octeon_irq_ciu3_mbox_cpu_online(struct irq_data *data)
2755 {
2756 octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), true);
2757 }
2758
2759 static void octeon_irq_ciu3_mbox_cpu_offline(struct irq_data *data)
2760 {
2761 octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), false);
2762 }
2763
2764 static int octeon_irq_ciu3_alloc_resources(struct octeon_ciu3_info *ciu3_info)
2765 {
2766 u64 b = ciu3_info->ciu3_addr;
2767 int idt_ip2, idt_ip3, idt_ip4;
2768 int unused_idt2;
2769 int core = cvmx_get_local_core_num();
2770 int i;
2771
2772 __this_cpu_write(octeon_ciu3_info, ciu3_info);
2773
2774 /*
2775 * 4 idt per core starting from 1 because zero is reserved.
2776 * Base idt per core is 4 * core + 1
2777 */
2778 idt_ip2 = core * 4 + 1;
2779 idt_ip3 = core * 4 + 2;
2780 idt_ip4 = core * 4 + 3;
2781 unused_idt2 = core * 4 + 4;
2782 __this_cpu_write(octeon_irq_ciu3_idt_ip2, idt_ip2);
2783 __this_cpu_write(octeon_irq_ciu3_idt_ip3, idt_ip3);
2784
2785 /* ip2 interrupts for this CPU */
2786 cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip2), 0);
2787 cvmx_write_csr(b + CIU3_IDT_PP(idt_ip2, 0), 1ull << core);
2788 cvmx_write_csr(b + CIU3_IDT_IO(idt_ip2), 0);
2789
2790 /* ip3 interrupts for this CPU */
2791 cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip3), 1);
2792 cvmx_write_csr(b + CIU3_IDT_PP(idt_ip3, 0), 1ull << core);
2793 cvmx_write_csr(b + CIU3_IDT_IO(idt_ip3), 0);
2794
2795 /* ip4 interrupts for this CPU */
2796 cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip4), 2);
2797 cvmx_write_csr(b + CIU3_IDT_PP(idt_ip4, 0), 0);
2798 cvmx_write_csr(b + CIU3_IDT_IO(idt_ip4), 0);
2799
2800 cvmx_write_csr(b + CIU3_IDT_CTL(unused_idt2), 0);
2801 cvmx_write_csr(b + CIU3_IDT_PP(unused_idt2, 0), 0);
2802 cvmx_write_csr(b + CIU3_IDT_IO(unused_idt2), 0);
2803
2804 for (i = 0; i < CIU3_MBOX_PER_CORE; i++) {
2805 unsigned int intsn = octeon_irq_ciu3_mbox_intsn_for_core(core, i);
2806
2807 cvmx_write_csr(b + CIU3_ISC_W1C(intsn), 2);
2808 cvmx_write_csr(b + CIU3_ISC_CTL(intsn), 0);
2809 }
2810
2811 return 0;
2812 }
2813
2814 static void octeon_irq_setup_secondary_ciu3(void)
2815 {
2816 struct octeon_ciu3_info *ciu3_info;
2817
2818 ciu3_info = octeon_ciu3_info_per_node[cvmx_get_node_num()];
2819 octeon_irq_ciu3_alloc_resources(ciu3_info);
2820 irq_cpu_online();
2821
2822 /* Enable the CIU lines */
2823 set_c0_status(STATUSF_IP3 | STATUSF_IP2);
2824 if (octeon_irq_use_ip4)
2825 set_c0_status(STATUSF_IP4);
2826 else
2827 clear_c0_status(STATUSF_IP4);
2828 }
2829
2830 static struct irq_chip octeon_irq_chip_ciu3_mbox = {
2831 .name = "CIU3-M",
2832 .irq_enable = octeon_irq_ciu3_mbox_enable,
2833 .irq_disable = octeon_irq_ciu3_mbox_disable,
2834 .irq_ack = octeon_irq_ciu3_mbox_ack,
2835
2836 .irq_cpu_online = octeon_irq_ciu3_mbox_cpu_online,
2837 .irq_cpu_offline = octeon_irq_ciu3_mbox_cpu_offline,
2838 .flags = IRQCHIP_ONOFFLINE_ENABLED,
2839 };
2840
2841 static int __init octeon_irq_init_ciu3(struct device_node *ciu_node,
2842 struct device_node *parent)
2843 {
2844 int i;
2845 int node;
2846 struct irq_domain *domain;
2847 struct octeon_ciu3_info *ciu3_info;
2848 const __be32 *zero_addr;
2849 u64 base_addr;
2850 union cvmx_ciu3_const consts;
2851
2852 node = 0; /* of_node_to_nid(ciu_node); */
2853 ciu3_info = kzalloc_node(sizeof(*ciu3_info), GFP_KERNEL, node);
2854
2855 if (!ciu3_info)
2856 return -ENOMEM;
2857
2858 zero_addr = of_get_address(ciu_node, 0, NULL, NULL);
2859 if (WARN_ON(!zero_addr))
2860 return -EINVAL;
2861
2862 base_addr = of_translate_address(ciu_node, zero_addr);
2863 base_addr = (u64)phys_to_virt(base_addr);
2864
2865 ciu3_info->ciu3_addr = base_addr;
2866 ciu3_info->node = node;
2867
2868 consts.u64 = cvmx_read_csr(base_addr + CIU3_CONST);
2869
2870 octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu3;
2871
2872 octeon_irq_ip2 = octeon_irq_ciu3_ip2;
2873 octeon_irq_ip3 = octeon_irq_ciu3_mbox;
2874 octeon_irq_ip4 = octeon_irq_ip4_mask;
2875
2876 if (node == cvmx_get_node_num()) {
2877 /* Mips internal */
2878 octeon_irq_init_core();
2879
2880 /* Only do per CPU things if it is the CIU of the boot node. */
2881 i = irq_alloc_descs_from(OCTEON_IRQ_MBOX0, 8, node);
2882 WARN_ON(i < 0);
2883
2884 for (i = 0; i < 8; i++)
2885 irq_set_chip_and_handler(i + OCTEON_IRQ_MBOX0,
2886 &octeon_irq_chip_ciu3_mbox, handle_percpu_irq);
2887 }
2888
2889 /*
2890 * Initialize all domains to use the default domain. Specific major
2891 * blocks will overwrite the default domain as needed.
2892 */
2893 domain = irq_domain_add_tree(ciu_node, &octeon_dflt_domain_ciu3_ops,
2894 ciu3_info);
2895 for (i = 0; i < MAX_CIU3_DOMAINS; i++)
2896 ciu3_info->domain[i] = domain;
2897
2898 octeon_ciu3_info_per_node[node] = ciu3_info;
2899
2900 if (node == cvmx_get_node_num()) {
2901 /* Only do per CPU things if it is the CIU of the boot node. */
2902 octeon_irq_ciu3_alloc_resources(ciu3_info);
2903 if (node == 0)
2904 irq_set_default_host(domain);
2905
2906 octeon_irq_use_ip4 = false;
2907 /* Enable the CIU lines */
2908 set_c0_status(STATUSF_IP2 | STATUSF_IP3);
2909 clear_c0_status(STATUSF_IP4);
2910 }
2911
2912 return 0;
2913 }
2914
2915 static struct of_device_id ciu_types[] __initdata = {
2916 {.compatible = "cavium,octeon-3860-ciu", .data = octeon_irq_init_ciu},
2917 {.compatible = "cavium,octeon-3860-gpio", .data = octeon_irq_init_gpio},
2918 {.compatible = "cavium,octeon-6880-ciu2", .data = octeon_irq_init_ciu2},
2919 {.compatible = "cavium,octeon-7890-ciu3", .data = octeon_irq_init_ciu3},
2920 {.compatible = "cavium,octeon-7130-cib", .data = octeon_irq_init_cib},
2921 {}
2922 };
2923
2924 void __init arch_init_irq(void)
2925 {
2926 #ifdef CONFIG_SMP
2927 /* Set the default affinity to the boot cpu. */
2928 cpumask_clear(irq_default_affinity);
2929 cpumask_set_cpu(smp_processor_id(), irq_default_affinity);
2930 #endif
2931 of_irq_init(ciu_types);
2932 }
2933
2934 asmlinkage void plat_irq_dispatch(void)
2935 {
2936 unsigned long cop0_cause;
2937 unsigned long cop0_status;
2938
2939 while (1) {
2940 cop0_cause = read_c0_cause();
2941 cop0_status = read_c0_status();
2942 cop0_cause &= cop0_status;
2943 cop0_cause &= ST0_IM;
2944
2945 if (cop0_cause & STATUSF_IP2)
2946 octeon_irq_ip2();
2947 else if (cop0_cause & STATUSF_IP3)
2948 octeon_irq_ip3();
2949 else if (cop0_cause & STATUSF_IP4)
2950 octeon_irq_ip4();
2951 else if (cop0_cause)
2952 do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE);
2953 else
2954 break;
2955 }
2956 }
2957
2958 #ifdef CONFIG_HOTPLUG_CPU
2959
2960 void octeon_fixup_irqs(void)
2961 {
2962 irq_cpu_offline();
2963 }
2964
2965 #endif /* CONFIG_HOTPLUG_CPU */
2966
2967 struct irq_domain *octeon_irq_get_block_domain(int node, uint8_t block)
2968 {
2969 struct octeon_ciu3_info *ciu3_info;
2970
2971 ciu3_info = octeon_ciu3_info_per_node[node & CVMX_NODE_MASK];
2972 return ciu3_info->domain[block];
2973 }
2974 EXPORT_SYMBOL(octeon_irq_get_block_domain);
Linux with added FPC-III support