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 = false;
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: (%pOFn) Invalid irq trigger specification: %x\n",
1184 		       node,
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 	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 = irq_alloc_desc_at(OCTEON_IRQ_MBOX0, -1);
1509 	if (r < 0) {
1510 		pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_MBOX0");
1511 		goto err;
1512 	}
1513 	r = octeon_irq_set_ciu_mapping(
1514 		OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq);
1515 	if (r)
1516 		goto err;
1517 	r = irq_alloc_desc_at(OCTEON_IRQ_MBOX1, -1);
1518 	if (r < 0) {
1519 		pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_MBOX1");
1520 		goto err;
1521 	}
1522 	r = octeon_irq_set_ciu_mapping(
1523 		OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq);
1524 	if (r)
1525 		goto err;
1526 
1527 	for (i = 0; i < 4; i++) {
1528 		r = octeon_irq_force_ciu_mapping(
1529 			ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36);
1530 		if (r)
1531 			goto err;
1532 	}
1533 	for (i = 0; i < 4; i++) {
1534 		r = octeon_irq_force_ciu_mapping(
1535 			ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40);
1536 		if (r)
1537 			goto err;
1538 	}
1539 
1540 	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45);
1541 	if (r)
1542 		goto err;
1543 
1544 	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46);
1545 	if (r)
1546 		goto err;
1547 
1548 	for (i = 0; i < 4; i++) {
1549 		r = octeon_irq_force_ciu_mapping(
1550 			ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52);
1551 		if (r)
1552 			goto err;
1553 	}
1554 
1555 	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59);
1556 	if (r)
1557 		goto err;
1558 
1559 	r = irq_alloc_descs(OCTEON_IRQ_WDOG0, OCTEON_IRQ_WDOG0, 16, -1);
1560 	if (r < 0) {
1561 		pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_WDOGx");
1562 		goto err;
1563 	}
1564 	/* CIU_1 */
1565 	for (i = 0; i < 16; i++) {
1566 		r = octeon_irq_set_ciu_mapping(
1567 			i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd,
1568 			handle_level_irq);
1569 		if (r)
1570 			goto err;
1571 	}
1572 
1573 	/* Enable the CIU lines */
1574 	set_c0_status(STATUSF_IP3 | STATUSF_IP2);
1575 	if (octeon_irq_use_ip4)
1576 		set_c0_status(STATUSF_IP4);
1577 	else
1578 		clear_c0_status(STATUSF_IP4);
1579 
1580 	return 0;
1581 err:
1582 	return r;
1583 }
1584 
1585 static int __init octeon_irq_init_gpio(
1586 	struct device_node *gpio_node, struct device_node *parent)
1587 {
1588 	struct octeon_irq_gpio_domain_data *gpiod;
1589 	u32 interrupt_cells;
1590 	unsigned int base_hwirq;
1591 	int r;
1592 
1593 	r = of_property_read_u32(parent, "#interrupt-cells", &interrupt_cells);
1594 	if (r)
1595 		return r;
1596 
1597 	if (interrupt_cells == 1) {
1598 		u32 v;
1599 
1600 		r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v);
1601 		if (r) {
1602 			pr_warn("No \"interrupts\" property.\n");
1603 			return r;
1604 		}
1605 		base_hwirq = v;
1606 	} else if (interrupt_cells == 2) {
1607 		u32 v0, v1;
1608 
1609 		r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v0);
1610 		if (r) {
1611 			pr_warn("No \"interrupts\" property.\n");
1612 			return r;
1613 		}
1614 		r = of_property_read_u32_index(gpio_node, "interrupts", 1, &v1);
1615 		if (r) {
1616 			pr_warn("No \"interrupts\" property.\n");
1617 			return r;
1618 		}
1619 		base_hwirq = (v0 << 6) | v1;
1620 	} else {
1621 		pr_warn("Bad \"#interrupt-cells\" property: %u\n",
1622 			interrupt_cells);
1623 		return -EINVAL;
1624 	}
1625 
1626 	gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL);
1627 	if (gpiod) {
1628 		/* gpio domain host_data is the base hwirq number. */
1629 		gpiod->base_hwirq = base_hwirq;
1630 		irq_domain_add_linear(
1631 			gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod);
1632 	} else {
1633 		pr_warn("Cannot allocate memory for GPIO irq_domain.\n");
1634 		return -ENOMEM;
1635 	}
1636 
1637 	/*
1638 	 * Clear the OF_POPULATED flag that was set by of_irq_init()
1639 	 * so that all GPIO devices will be probed.
1640 	 */
1641 	of_node_clear_flag(gpio_node, OF_POPULATED);
1642 
1643 	return 0;
1644 }
1645 /*
1646  * Watchdog interrupts are special.  They are associated with a single
1647  * core, so we hardwire the affinity to that core.
1648  */
1649 static void octeon_irq_ciu2_wd_enable(struct irq_data *data)
1650 {
1651 	u64 mask;
1652 	u64 en_addr;
1653 	int coreid = data->irq - OCTEON_IRQ_WDOG0;
1654 	struct octeon_ciu_chip_data *cd;
1655 
1656 	cd = irq_data_get_irq_chip_data(data);
1657 	mask = 1ull << (cd->bit);
1658 
1659 	en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
1660 		(0x1000ull * cd->line);
1661 	cvmx_write_csr(en_addr, mask);
1662 
1663 }
1664 
1665 static void octeon_irq_ciu2_enable(struct irq_data *data)
1666 {
1667 	u64 mask;
1668 	u64 en_addr;
1669 	int cpu = next_cpu_for_irq(data);
1670 	int coreid = octeon_coreid_for_cpu(cpu);
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 static void octeon_irq_ciu2_enable_local(struct irq_data *data)
1682 {
1683 	u64 mask;
1684 	u64 en_addr;
1685 	int coreid = cvmx_get_core_num();
1686 	struct octeon_ciu_chip_data *cd;
1687 
1688 	cd = irq_data_get_irq_chip_data(data);
1689 	mask = 1ull << (cd->bit);
1690 
1691 	en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
1692 		(0x1000ull * cd->line);
1693 	cvmx_write_csr(en_addr, mask);
1694 
1695 }
1696 
1697 static void octeon_irq_ciu2_disable_local(struct irq_data *data)
1698 {
1699 	u64 mask;
1700 	u64 en_addr;
1701 	int coreid = cvmx_get_core_num();
1702 	struct octeon_ciu_chip_data *cd;
1703 
1704 	cd = irq_data_get_irq_chip_data(data);
1705 	mask = 1ull << (cd->bit);
1706 
1707 	en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(coreid) +
1708 		(0x1000ull * cd->line);
1709 	cvmx_write_csr(en_addr, mask);
1710 
1711 }
1712 
1713 static void octeon_irq_ciu2_ack(struct irq_data *data)
1714 {
1715 	u64 mask;
1716 	u64 en_addr;
1717 	int coreid = cvmx_get_core_num();
1718 	struct octeon_ciu_chip_data *cd;
1719 
1720 	cd = irq_data_get_irq_chip_data(data);
1721 	mask = 1ull << (cd->bit);
1722 
1723 	en_addr = CVMX_CIU2_RAW_PPX_IP2_WRKQ(coreid) + (0x1000ull * cd->line);
1724 	cvmx_write_csr(en_addr, mask);
1725 
1726 }
1727 
1728 static void octeon_irq_ciu2_disable_all(struct irq_data *data)
1729 {
1730 	int cpu;
1731 	u64 mask;
1732 	struct octeon_ciu_chip_data *cd;
1733 
1734 	cd = irq_data_get_irq_chip_data(data);
1735 	mask = 1ull << (cd->bit);
1736 
1737 	for_each_online_cpu(cpu) {
1738 		u64 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
1739 			octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line);
1740 		cvmx_write_csr(en_addr, mask);
1741 	}
1742 }
1743 
1744 static void octeon_irq_ciu2_mbox_enable_all(struct irq_data *data)
1745 {
1746 	int cpu;
1747 	u64 mask;
1748 
1749 	mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1750 
1751 	for_each_online_cpu(cpu) {
1752 		u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(
1753 			octeon_coreid_for_cpu(cpu));
1754 		cvmx_write_csr(en_addr, mask);
1755 	}
1756 }
1757 
1758 static void octeon_irq_ciu2_mbox_disable_all(struct irq_data *data)
1759 {
1760 	int cpu;
1761 	u64 mask;
1762 
1763 	mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1764 
1765 	for_each_online_cpu(cpu) {
1766 		u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(
1767 			octeon_coreid_for_cpu(cpu));
1768 		cvmx_write_csr(en_addr, mask);
1769 	}
1770 }
1771 
1772 static void octeon_irq_ciu2_mbox_enable_local(struct irq_data *data)
1773 {
1774 	u64 mask;
1775 	u64 en_addr;
1776 	int coreid = cvmx_get_core_num();
1777 
1778 	mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1779 	en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(coreid);
1780 	cvmx_write_csr(en_addr, mask);
1781 }
1782 
1783 static void octeon_irq_ciu2_mbox_disable_local(struct irq_data *data)
1784 {
1785 	u64 mask;
1786 	u64 en_addr;
1787 	int coreid = cvmx_get_core_num();
1788 
1789 	mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1790 	en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(coreid);
1791 	cvmx_write_csr(en_addr, mask);
1792 }
1793 
1794 #ifdef CONFIG_SMP
1795 static int octeon_irq_ciu2_set_affinity(struct irq_data *data,
1796 					const struct cpumask *dest, bool force)
1797 {
1798 	int cpu;
1799 	bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
1800 	u64 mask;
1801 	struct octeon_ciu_chip_data *cd;
1802 
1803 	if (!enable_one)
1804 		return 0;
1805 
1806 	cd = irq_data_get_irq_chip_data(data);
1807 	mask = 1ull << cd->bit;
1808 
1809 	for_each_online_cpu(cpu) {
1810 		u64 en_addr;
1811 		if (cpumask_test_cpu(cpu, dest) && enable_one) {
1812 			enable_one = false;
1813 			en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(
1814 				octeon_coreid_for_cpu(cpu)) +
1815 				(0x1000ull * cd->line);
1816 		} else {
1817 			en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
1818 				octeon_coreid_for_cpu(cpu)) +
1819 				(0x1000ull * cd->line);
1820 		}
1821 		cvmx_write_csr(en_addr, mask);
1822 	}
1823 
1824 	return 0;
1825 }
1826 #endif
1827 
1828 static void octeon_irq_ciu2_enable_gpio(struct irq_data *data)
1829 {
1830 	octeon_irq_gpio_setup(data);
1831 	octeon_irq_ciu2_enable(data);
1832 }
1833 
1834 static void octeon_irq_ciu2_disable_gpio(struct irq_data *data)
1835 {
1836 	struct octeon_ciu_chip_data *cd;
1837 
1838 	cd = irq_data_get_irq_chip_data(data);
1839 
1840 	cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
1841 
1842 	octeon_irq_ciu2_disable_all(data);
1843 }
1844 
1845 static struct irq_chip octeon_irq_chip_ciu2 = {
1846 	.name = "CIU2-E",
1847 	.irq_enable = octeon_irq_ciu2_enable,
1848 	.irq_disable = octeon_irq_ciu2_disable_all,
1849 	.irq_mask = octeon_irq_ciu2_disable_local,
1850 	.irq_unmask = octeon_irq_ciu2_enable,
1851 #ifdef CONFIG_SMP
1852 	.irq_set_affinity = octeon_irq_ciu2_set_affinity,
1853 	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1854 #endif
1855 };
1856 
1857 static struct irq_chip octeon_irq_chip_ciu2_edge = {
1858 	.name = "CIU2-E",
1859 	.irq_enable = octeon_irq_ciu2_enable,
1860 	.irq_disable = octeon_irq_ciu2_disable_all,
1861 	.irq_ack = octeon_irq_ciu2_ack,
1862 	.irq_mask = octeon_irq_ciu2_disable_local,
1863 	.irq_unmask = octeon_irq_ciu2_enable,
1864 #ifdef CONFIG_SMP
1865 	.irq_set_affinity = octeon_irq_ciu2_set_affinity,
1866 	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1867 #endif
1868 };
1869 
1870 static struct irq_chip octeon_irq_chip_ciu2_mbox = {
1871 	.name = "CIU2-M",
1872 	.irq_enable = octeon_irq_ciu2_mbox_enable_all,
1873 	.irq_disable = octeon_irq_ciu2_mbox_disable_all,
1874 	.irq_ack = octeon_irq_ciu2_mbox_disable_local,
1875 	.irq_eoi = octeon_irq_ciu2_mbox_enable_local,
1876 
1877 	.irq_cpu_online = octeon_irq_ciu2_mbox_enable_local,
1878 	.irq_cpu_offline = octeon_irq_ciu2_mbox_disable_local,
1879 	.flags = IRQCHIP_ONOFFLINE_ENABLED,
1880 };
1881 
1882 static struct irq_chip octeon_irq_chip_ciu2_wd = {
1883 	.name = "CIU2-W",
1884 	.irq_enable = octeon_irq_ciu2_wd_enable,
1885 	.irq_disable = octeon_irq_ciu2_disable_all,
1886 	.irq_mask = octeon_irq_ciu2_disable_local,
1887 	.irq_unmask = octeon_irq_ciu2_enable_local,
1888 };
1889 
1890 static struct irq_chip octeon_irq_chip_ciu2_gpio = {
1891 	.name = "CIU-GPIO",
1892 	.irq_enable = octeon_irq_ciu2_enable_gpio,
1893 	.irq_disable = octeon_irq_ciu2_disable_gpio,
1894 	.irq_ack = octeon_irq_ciu_gpio_ack,
1895 	.irq_mask = octeon_irq_ciu2_disable_local,
1896 	.irq_unmask = octeon_irq_ciu2_enable,
1897 	.irq_set_type = octeon_irq_ciu_gpio_set_type,
1898 #ifdef CONFIG_SMP
1899 	.irq_set_affinity = octeon_irq_ciu2_set_affinity,
1900 	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1901 #endif
1902 	.flags = IRQCHIP_SET_TYPE_MASKED,
1903 };
1904 
1905 static int octeon_irq_ciu2_xlat(struct irq_domain *d,
1906 				struct device_node *node,
1907 				const u32 *intspec,
1908 				unsigned int intsize,
1909 				unsigned long *out_hwirq,
1910 				unsigned int *out_type)
1911 {
1912 	unsigned int ciu, bit;
1913 
1914 	ciu = intspec[0];
1915 	bit = intspec[1];
1916 
1917 	*out_hwirq = (ciu << 6) | bit;
1918 	*out_type = 0;
1919 
1920 	return 0;
1921 }
1922 
1923 static bool octeon_irq_ciu2_is_edge(unsigned int line, unsigned int bit)
1924 {
1925 	bool edge = false;
1926 
1927 	if (line == 3) /* MIO */
1928 		switch (bit) {
1929 		case 2:	 /* IPD_DRP */
1930 		case 8 ... 11: /* Timers */
1931 		case 48: /* PTP */
1932 			edge = true;
1933 			break;
1934 		default:
1935 			break;
1936 		}
1937 	else if (line == 6) /* PKT */
1938 		switch (bit) {
1939 		case 52 ... 53: /* ILK_DRP */
1940 		case 8 ... 12:	/* GMX_DRP */
1941 			edge = true;
1942 			break;
1943 		default:
1944 			break;
1945 		}
1946 	return edge;
1947 }
1948 
1949 static int octeon_irq_ciu2_map(struct irq_domain *d,
1950 			       unsigned int virq, irq_hw_number_t hw)
1951 {
1952 	unsigned int line = hw >> 6;
1953 	unsigned int bit = hw & 63;
1954 
1955 	/*
1956 	 * Don't map irq if it is reserved for GPIO.
1957 	 * (Line 7 are the GPIO lines.)
1958 	 */
1959 	if (line == 7)
1960 		return 0;
1961 
1962 	if (line > 7 || octeon_irq_ciu_to_irq[line][bit] != 0)
1963 		return -EINVAL;
1964 
1965 	if (octeon_irq_ciu2_is_edge(line, bit))
1966 		octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1967 					   &octeon_irq_chip_ciu2_edge,
1968 					   handle_edge_irq);
1969 	else
1970 		octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1971 					   &octeon_irq_chip_ciu2,
1972 					   handle_level_irq);
1973 
1974 	return 0;
1975 }
1976 
1977 static struct irq_domain_ops octeon_irq_domain_ciu2_ops = {
1978 	.map = octeon_irq_ciu2_map,
1979 	.unmap = octeon_irq_free_cd,
1980 	.xlate = octeon_irq_ciu2_xlat,
1981 };
1982 
1983 static void octeon_irq_ciu2(void)
1984 {
1985 	int line;
1986 	int bit;
1987 	int irq;
1988 	u64 src_reg, src, sum;
1989 	const unsigned long core_id = cvmx_get_core_num();
1990 
1991 	sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(core_id)) & 0xfful;
1992 
1993 	if (unlikely(!sum))
1994 		goto spurious;
1995 
1996 	line = fls64(sum) - 1;
1997 	src_reg = CVMX_CIU2_SRC_PPX_IP2_WRKQ(core_id) + (0x1000 * line);
1998 	src = cvmx_read_csr(src_reg);
1999 
2000 	if (unlikely(!src))
2001 		goto spurious;
2002 
2003 	bit = fls64(src) - 1;
2004 	irq = octeon_irq_ciu_to_irq[line][bit];
2005 	if (unlikely(!irq))
2006 		goto spurious;
2007 
2008 	do_IRQ(irq);
2009 	goto out;
2010 
2011 spurious:
2012 	spurious_interrupt();
2013 out:
2014 	/* CN68XX pass 1.x has an errata that accessing the ACK registers
2015 		can stop interrupts from propagating */
2016 	if (OCTEON_IS_MODEL(OCTEON_CN68XX))
2017 		cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
2018 	else
2019 		cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP2(core_id));
2020 	return;
2021 }
2022 
2023 static void octeon_irq_ciu2_mbox(void)
2024 {
2025 	int line;
2026 
2027 	const unsigned long core_id = cvmx_get_core_num();
2028 	u64 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP3(core_id)) >> 60;
2029 
2030 	if (unlikely(!sum))
2031 		goto spurious;
2032 
2033 	line = fls64(sum) - 1;
2034 
2035 	do_IRQ(OCTEON_IRQ_MBOX0 + line);
2036 	goto out;
2037 
2038 spurious:
2039 	spurious_interrupt();
2040 out:
2041 	/* CN68XX pass 1.x has an errata that accessing the ACK registers
2042 		can stop interrupts from propagating */
2043 	if (OCTEON_IS_MODEL(OCTEON_CN68XX))
2044 		cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
2045 	else
2046 		cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP3(core_id));
2047 	return;
2048 }
2049 
2050 static int __init octeon_irq_init_ciu2(
2051 	struct device_node *ciu_node, struct device_node *parent)
2052 {
2053 	unsigned int i, r;
2054 	struct irq_domain *ciu_domain = NULL;
2055 
2056 	octeon_irq_init_ciu2_percpu();
2057 	octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu2;
2058 
2059 	octeon_irq_gpio_chip = &octeon_irq_chip_ciu2_gpio;
2060 	octeon_irq_ip2 = octeon_irq_ciu2;
2061 	octeon_irq_ip3 = octeon_irq_ciu2_mbox;
2062 	octeon_irq_ip4 = octeon_irq_ip4_mask;
2063 
2064 	/* Mips internal */
2065 	octeon_irq_init_core();
2066 
2067 	ciu_domain = irq_domain_add_tree(
2068 		ciu_node, &octeon_irq_domain_ciu2_ops, NULL);
2069 	irq_set_default_host(ciu_domain);
2070 
2071 	/* CUI2 */
2072 	for (i = 0; i < 64; i++) {
2073 		r = octeon_irq_force_ciu_mapping(
2074 			ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i);
2075 		if (r)
2076 			goto err;
2077 	}
2078 
2079 	for (i = 0; i < 32; i++) {
2080 		r = octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i, 0,
2081 			&octeon_irq_chip_ciu2_wd, handle_level_irq);
2082 		if (r)
2083 			goto err;
2084 	}
2085 
2086 	for (i = 0; i < 4; i++) {
2087 		r = octeon_irq_force_ciu_mapping(
2088 			ciu_domain, i + OCTEON_IRQ_TIMER0, 3, i + 8);
2089 		if (r)
2090 			goto err;
2091 	}
2092 
2093 	for (i = 0; i < 4; i++) {
2094 		r = octeon_irq_force_ciu_mapping(
2095 			ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i);
2096 		if (r)
2097 			goto err;
2098 	}
2099 
2100 	for (i = 0; i < 4; i++) {
2101 		r = octeon_irq_force_ciu_mapping(
2102 			ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 4, i + 8);
2103 		if (r)
2104 			goto err;
2105 	}
2106 
2107 	irq_set_chip_and_handler(OCTEON_IRQ_MBOX0, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2108 	irq_set_chip_and_handler(OCTEON_IRQ_MBOX1, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2109 	irq_set_chip_and_handler(OCTEON_IRQ_MBOX2, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2110 	irq_set_chip_and_handler(OCTEON_IRQ_MBOX3, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2111 
2112 	/* Enable the CIU lines */
2113 	set_c0_status(STATUSF_IP3 | STATUSF_IP2);
2114 	clear_c0_status(STATUSF_IP4);
2115 	return 0;
2116 err:
2117 	return r;
2118 }
2119 
2120 struct octeon_irq_cib_host_data {
2121 	raw_spinlock_t lock;
2122 	u64 raw_reg;
2123 	u64 en_reg;
2124 	int max_bits;
2125 };
2126 
2127 struct octeon_irq_cib_chip_data {
2128 	struct octeon_irq_cib_host_data *host_data;
2129 	int bit;
2130 };
2131 
2132 static void octeon_irq_cib_enable(struct irq_data *data)
2133 {
2134 	unsigned long flags;
2135 	u64 en;
2136 	struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
2137 	struct octeon_irq_cib_host_data *host_data = cd->host_data;
2138 
2139 	raw_spin_lock_irqsave(&host_data->lock, flags);
2140 	en = cvmx_read_csr(host_data->en_reg);
2141 	en |= 1ull << cd->bit;
2142 	cvmx_write_csr(host_data->en_reg, en);
2143 	raw_spin_unlock_irqrestore(&host_data->lock, flags);
2144 }
2145 
2146 static void octeon_irq_cib_disable(struct irq_data *data)
2147 {
2148 	unsigned long flags;
2149 	u64 en;
2150 	struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
2151 	struct octeon_irq_cib_host_data *host_data = cd->host_data;
2152 
2153 	raw_spin_lock_irqsave(&host_data->lock, flags);
2154 	en = cvmx_read_csr(host_data->en_reg);
2155 	en &= ~(1ull << cd->bit);
2156 	cvmx_write_csr(host_data->en_reg, en);
2157 	raw_spin_unlock_irqrestore(&host_data->lock, flags);
2158 }
2159 
2160 static int octeon_irq_cib_set_type(struct irq_data *data, unsigned int t)
2161 {
2162 	irqd_set_trigger_type(data, t);
2163 	return IRQ_SET_MASK_OK;
2164 }
2165 
2166 static struct irq_chip octeon_irq_chip_cib = {
2167 	.name = "CIB",
2168 	.irq_enable = octeon_irq_cib_enable,
2169 	.irq_disable = octeon_irq_cib_disable,
2170 	.irq_mask = octeon_irq_cib_disable,
2171 	.irq_unmask = octeon_irq_cib_enable,
2172 	.irq_set_type = octeon_irq_cib_set_type,
2173 };
2174 
2175 static int octeon_irq_cib_xlat(struct irq_domain *d,
2176 				   struct device_node *node,
2177 				   const u32 *intspec,
2178 				   unsigned int intsize,
2179 				   unsigned long *out_hwirq,
2180 				   unsigned int *out_type)
2181 {
2182 	unsigned int type = 0;
2183 
2184 	if (intsize == 2)
2185 		type = intspec[1];
2186 
2187 	switch (type) {
2188 	case 0: /* unofficial value, but we might as well let it work. */
2189 	case 4: /* official value for level triggering. */
2190 		*out_type = IRQ_TYPE_LEVEL_HIGH;
2191 		break;
2192 	case 1: /* official value for edge triggering. */
2193 		*out_type = IRQ_TYPE_EDGE_RISING;
2194 		break;
2195 	default: /* Nothing else is acceptable. */
2196 		return -EINVAL;
2197 	}
2198 
2199 	*out_hwirq = intspec[0];
2200 
2201 	return 0;
2202 }
2203 
2204 static int octeon_irq_cib_map(struct irq_domain *d,
2205 			      unsigned int virq, irq_hw_number_t hw)
2206 {
2207 	struct octeon_irq_cib_host_data *host_data = d->host_data;
2208 	struct octeon_irq_cib_chip_data *cd;
2209 
2210 	if (hw >= host_data->max_bits) {
2211 		pr_err("ERROR: %s mapping %u is too big!\n",
2212 		       irq_domain_get_of_node(d)->name, (unsigned)hw);
2213 		return -EINVAL;
2214 	}
2215 
2216 	cd = kzalloc(sizeof(*cd), GFP_KERNEL);
2217 	if (!cd)
2218 		return -ENOMEM;
2219 
2220 	cd->host_data = host_data;
2221 	cd->bit = hw;
2222 
2223 	irq_set_chip_and_handler(virq, &octeon_irq_chip_cib,
2224 				 handle_simple_irq);
2225 	irq_set_chip_data(virq, cd);
2226 	return 0;
2227 }
2228 
2229 static struct irq_domain_ops octeon_irq_domain_cib_ops = {
2230 	.map = octeon_irq_cib_map,
2231 	.unmap = octeon_irq_free_cd,
2232 	.xlate = octeon_irq_cib_xlat,
2233 };
2234 
2235 /* Chain to real handler. */
2236 static irqreturn_t octeon_irq_cib_handler(int my_irq, void *data)
2237 {
2238 	u64 en;
2239 	u64 raw;
2240 	u64 bits;
2241 	int i;
2242 	int irq;
2243 	struct irq_domain *cib_domain = data;
2244 	struct octeon_irq_cib_host_data *host_data = cib_domain->host_data;
2245 
2246 	en = cvmx_read_csr(host_data->en_reg);
2247 	raw = cvmx_read_csr(host_data->raw_reg);
2248 
2249 	bits = en & raw;
2250 
2251 	for (i = 0; i < host_data->max_bits; i++) {
2252 		if ((bits & 1ull << i) == 0)
2253 			continue;
2254 		irq = irq_find_mapping(cib_domain, i);
2255 		if (!irq) {
2256 			unsigned long flags;
2257 
2258 			pr_err("ERROR: CIB bit %d@%llx IRQ unhandled, disabling\n",
2259 				i, host_data->raw_reg);
2260 			raw_spin_lock_irqsave(&host_data->lock, flags);
2261 			en = cvmx_read_csr(host_data->en_reg);
2262 			en &= ~(1ull << i);
2263 			cvmx_write_csr(host_data->en_reg, en);
2264 			cvmx_write_csr(host_data->raw_reg, 1ull << i);
2265 			raw_spin_unlock_irqrestore(&host_data->lock, flags);
2266 		} else {
2267 			struct irq_desc *desc = irq_to_desc(irq);
2268 			struct irq_data *irq_data = irq_desc_get_irq_data(desc);
2269 			/* If edge, acknowledge the bit we will be sending. */
2270 			if (irqd_get_trigger_type(irq_data) &
2271 				IRQ_TYPE_EDGE_BOTH)
2272 				cvmx_write_csr(host_data->raw_reg, 1ull << i);
2273 			generic_handle_irq_desc(desc);
2274 		}
2275 	}
2276 
2277 	return IRQ_HANDLED;
2278 }
2279 
2280 static int __init octeon_irq_init_cib(struct device_node *ciu_node,
2281 				      struct device_node *parent)
2282 {
2283 	const __be32 *addr;
2284 	u32 val;
2285 	struct octeon_irq_cib_host_data *host_data;
2286 	int parent_irq;
2287 	int r;
2288 	struct irq_domain *cib_domain;
2289 
2290 	parent_irq = irq_of_parse_and_map(ciu_node, 0);
2291 	if (!parent_irq) {
2292 		pr_err("ERROR: Couldn't acquire parent_irq for %pOFn\n",
2293 			ciu_node);
2294 		return -EINVAL;
2295 	}
2296 
2297 	host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
2298 	if (!host_data)
2299 		return -ENOMEM;
2300 	raw_spin_lock_init(&host_data->lock);
2301 
2302 	addr = of_get_address(ciu_node, 0, NULL, NULL);
2303 	if (!addr) {
2304 		pr_err("ERROR: Couldn't acquire reg(0) %pOFn\n", ciu_node);
2305 		return -EINVAL;
2306 	}
2307 	host_data->raw_reg = (u64)phys_to_virt(
2308 		of_translate_address(ciu_node, addr));
2309 
2310 	addr = of_get_address(ciu_node, 1, NULL, NULL);
2311 	if (!addr) {
2312 		pr_err("ERROR: Couldn't acquire reg(1) %pOFn\n", ciu_node);
2313 		return -EINVAL;
2314 	}
2315 	host_data->en_reg = (u64)phys_to_virt(
2316 		of_translate_address(ciu_node, addr));
2317 
2318 	r = of_property_read_u32(ciu_node, "cavium,max-bits", &val);
2319 	if (r) {
2320 		pr_err("ERROR: Couldn't read cavium,max-bits from %pOFn\n",
2321 			ciu_node);
2322 		return r;
2323 	}
2324 	host_data->max_bits = val;
2325 
2326 	cib_domain = irq_domain_add_linear(ciu_node, host_data->max_bits,
2327 					   &octeon_irq_domain_cib_ops,
2328 					   host_data);
2329 	if (!cib_domain) {
2330 		pr_err("ERROR: Couldn't irq_domain_add_linear()\n");
2331 		return -ENOMEM;
2332 	}
2333 
2334 	cvmx_write_csr(host_data->en_reg, 0); /* disable all IRQs */
2335 	cvmx_write_csr(host_data->raw_reg, ~0); /* ack any outstanding */
2336 
2337 	r = request_irq(parent_irq, octeon_irq_cib_handler,
2338 			IRQF_NO_THREAD, "cib", cib_domain);
2339 	if (r) {
2340 		pr_err("request_irq cib failed %d\n", r);
2341 		return r;
2342 	}
2343 	pr_info("CIB interrupt controller probed: %llx %d\n",
2344 		host_data->raw_reg, host_data->max_bits);
2345 	return 0;
2346 }
2347 
2348 int octeon_irq_ciu3_xlat(struct irq_domain *d,
2349 			 struct device_node *node,
2350 			 const u32 *intspec,
2351 			 unsigned int intsize,
2352 			 unsigned long *out_hwirq,
2353 			 unsigned int *out_type)
2354 {
2355 	struct octeon_ciu3_info *ciu3_info = d->host_data;
2356 	unsigned int hwirq, type, intsn_major;
2357 	union cvmx_ciu3_iscx_ctl isc;
2358 
2359 	if (intsize < 2)
2360 		return -EINVAL;
2361 	hwirq = intspec[0];
2362 	type = intspec[1];
2363 
2364 	if (hwirq >= (1 << 20))
2365 		return -EINVAL;
2366 
2367 	intsn_major = hwirq >> 12;
2368 	switch (intsn_major) {
2369 	case 0x04: /* Software handled separately. */
2370 		return -EINVAL;
2371 	default:
2372 		break;
2373 	}
2374 
2375 	isc.u64 =  cvmx_read_csr(ciu3_info->ciu3_addr + CIU3_ISC_CTL(hwirq));
2376 	if (!isc.s.imp)
2377 		return -EINVAL;
2378 
2379 	switch (type) {
2380 	case 4: /* official value for level triggering. */
2381 		*out_type = IRQ_TYPE_LEVEL_HIGH;
2382 		break;
2383 	case 0: /* unofficial value, but we might as well let it work. */
2384 	case 1: /* official value for edge triggering. */
2385 		*out_type = IRQ_TYPE_EDGE_RISING;
2386 		break;
2387 	default: /* Nothing else is acceptable. */
2388 		return -EINVAL;
2389 	}
2390 
2391 	*out_hwirq = hwirq;
2392 
2393 	return 0;
2394 }
2395 
2396 void octeon_irq_ciu3_enable(struct irq_data *data)
2397 {
2398 	int cpu;
2399 	union cvmx_ciu3_iscx_ctl isc_ctl;
2400 	union cvmx_ciu3_iscx_w1c isc_w1c;
2401 	u64 isc_ctl_addr;
2402 
2403 	struct octeon_ciu_chip_data *cd;
2404 
2405 	cpu = next_cpu_for_irq(data);
2406 
2407 	cd = irq_data_get_irq_chip_data(data);
2408 
2409 	isc_w1c.u64 = 0;
2410 	isc_w1c.s.en = 1;
2411 	cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2412 
2413 	isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2414 	isc_ctl.u64 = 0;
2415 	isc_ctl.s.en = 1;
2416 	isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
2417 	cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2418 	cvmx_read_csr(isc_ctl_addr);
2419 }
2420 
2421 void octeon_irq_ciu3_disable(struct irq_data *data)
2422 {
2423 	u64 isc_ctl_addr;
2424 	union cvmx_ciu3_iscx_w1c isc_w1c;
2425 
2426 	struct octeon_ciu_chip_data *cd;
2427 
2428 	cd = irq_data_get_irq_chip_data(data);
2429 
2430 	isc_w1c.u64 = 0;
2431 	isc_w1c.s.en = 1;
2432 
2433 	isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2434 	cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2435 	cvmx_write_csr(isc_ctl_addr, 0);
2436 	cvmx_read_csr(isc_ctl_addr);
2437 }
2438 
2439 void octeon_irq_ciu3_ack(struct irq_data *data)
2440 {
2441 	u64 isc_w1c_addr;
2442 	union cvmx_ciu3_iscx_w1c isc_w1c;
2443 	struct octeon_ciu_chip_data *cd;
2444 	u32 trigger_type = irqd_get_trigger_type(data);
2445 
2446 	/*
2447 	 * We use a single irq_chip, so we have to do nothing to ack a
2448 	 * level interrupt.
2449 	 */
2450 	if (!(trigger_type & IRQ_TYPE_EDGE_BOTH))
2451 		return;
2452 
2453 	cd = irq_data_get_irq_chip_data(data);
2454 
2455 	isc_w1c.u64 = 0;
2456 	isc_w1c.s.raw = 1;
2457 
2458 	isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2459 	cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2460 	cvmx_read_csr(isc_w1c_addr);
2461 }
2462 
2463 void octeon_irq_ciu3_mask(struct irq_data *data)
2464 {
2465 	union cvmx_ciu3_iscx_w1c isc_w1c;
2466 	u64 isc_w1c_addr;
2467 	struct octeon_ciu_chip_data *cd;
2468 
2469 	cd = irq_data_get_irq_chip_data(data);
2470 
2471 	isc_w1c.u64 = 0;
2472 	isc_w1c.s.en = 1;
2473 
2474 	isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2475 	cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2476 	cvmx_read_csr(isc_w1c_addr);
2477 }
2478 
2479 void octeon_irq_ciu3_mask_ack(struct irq_data *data)
2480 {
2481 	union cvmx_ciu3_iscx_w1c isc_w1c;
2482 	u64 isc_w1c_addr;
2483 	struct octeon_ciu_chip_data *cd;
2484 	u32 trigger_type = irqd_get_trigger_type(data);
2485 
2486 	cd = irq_data_get_irq_chip_data(data);
2487 
2488 	isc_w1c.u64 = 0;
2489 	isc_w1c.s.en = 1;
2490 
2491 	/*
2492 	 * We use a single irq_chip, so only ack an edge (!level)
2493 	 * interrupt.
2494 	 */
2495 	if (trigger_type & IRQ_TYPE_EDGE_BOTH)
2496 		isc_w1c.s.raw = 1;
2497 
2498 	isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2499 	cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2500 	cvmx_read_csr(isc_w1c_addr);
2501 }
2502 
2503 #ifdef CONFIG_SMP
2504 static int octeon_irq_ciu3_set_affinity(struct irq_data *data,
2505 					const struct cpumask *dest, bool force)
2506 {
2507 	union cvmx_ciu3_iscx_ctl isc_ctl;
2508 	union cvmx_ciu3_iscx_w1c isc_w1c;
2509 	u64 isc_ctl_addr;
2510 	int cpu;
2511 	bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
2512 	struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
2513 
2514 	if (!cpumask_subset(dest, cpumask_of_node(cd->ciu_node)))
2515 		return -EINVAL;
2516 
2517 	if (!enable_one)
2518 		return IRQ_SET_MASK_OK;
2519 
2520 	cd = irq_data_get_irq_chip_data(data);
2521 	cpu = cpumask_first(dest);
2522 	if (cpu >= nr_cpu_ids)
2523 		cpu = smp_processor_id();
2524 	cd->current_cpu = cpu;
2525 
2526 	isc_w1c.u64 = 0;
2527 	isc_w1c.s.en = 1;
2528 	cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2529 
2530 	isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2531 	isc_ctl.u64 = 0;
2532 	isc_ctl.s.en = 1;
2533 	isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
2534 	cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2535 	cvmx_read_csr(isc_ctl_addr);
2536 
2537 	return IRQ_SET_MASK_OK;
2538 }
2539 #endif
2540 
2541 static struct irq_chip octeon_irq_chip_ciu3 = {
2542 	.name = "CIU3",
2543 	.irq_startup = edge_startup,
2544 	.irq_enable = octeon_irq_ciu3_enable,
2545 	.irq_disable = octeon_irq_ciu3_disable,
2546 	.irq_ack = octeon_irq_ciu3_ack,
2547 	.irq_mask = octeon_irq_ciu3_mask,
2548 	.irq_mask_ack = octeon_irq_ciu3_mask_ack,
2549 	.irq_unmask = octeon_irq_ciu3_enable,
2550 	.irq_set_type = octeon_irq_ciu_set_type,
2551 #ifdef CONFIG_SMP
2552 	.irq_set_affinity = octeon_irq_ciu3_set_affinity,
2553 	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
2554 #endif
2555 };
2556 
2557 int octeon_irq_ciu3_mapx(struct irq_domain *d, unsigned int virq,
2558 			 irq_hw_number_t hw, struct irq_chip *chip)
2559 {
2560 	struct octeon_ciu3_info *ciu3_info = d->host_data;
2561 	struct octeon_ciu_chip_data *cd = kzalloc_node(sizeof(*cd), GFP_KERNEL,
2562 						       ciu3_info->node);
2563 	if (!cd)
2564 		return -ENOMEM;
2565 	cd->intsn = hw;
2566 	cd->current_cpu = -1;
2567 	cd->ciu3_addr = ciu3_info->ciu3_addr;
2568 	cd->ciu_node = ciu3_info->node;
2569 	irq_set_chip_and_handler(virq, chip, handle_edge_irq);
2570 	irq_set_chip_data(virq, cd);
2571 
2572 	return 0;
2573 }
2574 
2575 static int octeon_irq_ciu3_map(struct irq_domain *d,
2576 			       unsigned int virq, irq_hw_number_t hw)
2577 {
2578 	return octeon_irq_ciu3_mapx(d, virq, hw, &octeon_irq_chip_ciu3);
2579 }
2580 
2581 static struct irq_domain_ops octeon_dflt_domain_ciu3_ops = {
2582 	.map = octeon_irq_ciu3_map,
2583 	.unmap = octeon_irq_free_cd,
2584 	.xlate = octeon_irq_ciu3_xlat,
2585 };
2586 
2587 static void octeon_irq_ciu3_ip2(void)
2588 {
2589 	union cvmx_ciu3_destx_pp_int dest_pp_int;
2590 	struct octeon_ciu3_info *ciu3_info;
2591 	u64 ciu3_addr;
2592 
2593 	ciu3_info = __this_cpu_read(octeon_ciu3_info);
2594 	ciu3_addr = ciu3_info->ciu3_addr;
2595 
2596 	dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(3 * cvmx_get_local_core_num()));
2597 
2598 	if (likely(dest_pp_int.s.intr)) {
2599 		irq_hw_number_t intsn = dest_pp_int.s.intsn;
2600 		irq_hw_number_t hw;
2601 		struct irq_domain *domain;
2602 		/* Get the domain to use from the major block */
2603 		int block = intsn >> 12;
2604 		int ret;
2605 
2606 		domain = ciu3_info->domain[block];
2607 		if (ciu3_info->intsn2hw[block])
2608 			hw = ciu3_info->intsn2hw[block](domain, intsn);
2609 		else
2610 			hw = intsn;
2611 
2612 		ret = handle_domain_irq(domain, hw, NULL);
2613 		if (ret < 0) {
2614 			union cvmx_ciu3_iscx_w1c isc_w1c;
2615 			u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);
2616 
2617 			isc_w1c.u64 = 0;
2618 			isc_w1c.s.en = 1;
2619 			cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2620 			cvmx_read_csr(isc_w1c_addr);
2621 			spurious_interrupt();
2622 		}
2623 	} else {
2624 		spurious_interrupt();
2625 	}
2626 }
2627 
2628 /*
2629  * 10 mbox per core starting from zero.
2630  * Base mbox is core * 10
2631  */
2632 static unsigned int octeon_irq_ciu3_base_mbox_intsn(int core)
2633 {
2634 	/* SW (mbox) are 0x04 in bits 12..19 */
2635 	return 0x04000 + CIU3_MBOX_PER_CORE * core;
2636 }
2637 
2638 static unsigned int octeon_irq_ciu3_mbox_intsn_for_core(int core, unsigned int mbox)
2639 {
2640 	return octeon_irq_ciu3_base_mbox_intsn(core) + mbox;
2641 }
2642 
2643 static unsigned int octeon_irq_ciu3_mbox_intsn_for_cpu(int cpu, unsigned int mbox)
2644 {
2645 	int local_core = octeon_coreid_for_cpu(cpu) & 0x3f;
2646 
2647 	return octeon_irq_ciu3_mbox_intsn_for_core(local_core, mbox);
2648 }
2649 
2650 static void octeon_irq_ciu3_mbox(void)
2651 {
2652 	union cvmx_ciu3_destx_pp_int dest_pp_int;
2653 	struct octeon_ciu3_info *ciu3_info;
2654 	u64 ciu3_addr;
2655 	int core = cvmx_get_local_core_num();
2656 
2657 	ciu3_info = __this_cpu_read(octeon_ciu3_info);
2658 	ciu3_addr = ciu3_info->ciu3_addr;
2659 
2660 	dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(1 + 3 * core));
2661 
2662 	if (likely(dest_pp_int.s.intr)) {
2663 		irq_hw_number_t intsn = dest_pp_int.s.intsn;
2664 		int mbox = intsn - octeon_irq_ciu3_base_mbox_intsn(core);
2665 
2666 		if (likely(mbox >= 0 && mbox < CIU3_MBOX_PER_CORE)) {
2667 			do_IRQ(mbox + OCTEON_IRQ_MBOX0);
2668 		} else {
2669 			union cvmx_ciu3_iscx_w1c isc_w1c;
2670 			u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);
2671 
2672 			isc_w1c.u64 = 0;
2673 			isc_w1c.s.en = 1;
2674 			cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2675 			cvmx_read_csr(isc_w1c_addr);
2676 			spurious_interrupt();
2677 		}
2678 	} else {
2679 		spurious_interrupt();
2680 	}
2681 }
2682 
2683 void octeon_ciu3_mbox_send(int cpu, unsigned int mbox)
2684 {
2685 	struct octeon_ciu3_info *ciu3_info;
2686 	unsigned int intsn;
2687 	union cvmx_ciu3_iscx_w1s isc_w1s;
2688 	u64 isc_w1s_addr;
2689 
2690 	if (WARN_ON_ONCE(mbox >= CIU3_MBOX_PER_CORE))
2691 		return;
2692 
2693 	intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
2694 	ciu3_info = per_cpu(octeon_ciu3_info, cpu);
2695 	isc_w1s_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1S(intsn);
2696 
2697 	isc_w1s.u64 = 0;
2698 	isc_w1s.s.raw = 1;
2699 
2700 	cvmx_write_csr(isc_w1s_addr, isc_w1s.u64);
2701 	cvmx_read_csr(isc_w1s_addr);
2702 }
2703 
2704 static void octeon_irq_ciu3_mbox_set_enable(struct irq_data *data, int cpu, bool en)
2705 {
2706 	struct octeon_ciu3_info *ciu3_info;
2707 	unsigned int intsn;
2708 	u64 isc_ctl_addr, isc_w1c_addr;
2709 	union cvmx_ciu3_iscx_ctl isc_ctl;
2710 	unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2711 
2712 	intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
2713 	ciu3_info = per_cpu(octeon_ciu3_info, cpu);
2714 	isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
2715 	isc_ctl_addr = ciu3_info->ciu3_addr + CIU3_ISC_CTL(intsn);
2716 
2717 	isc_ctl.u64 = 0;
2718 	isc_ctl.s.en = 1;
2719 
2720 	cvmx_write_csr(isc_w1c_addr, isc_ctl.u64);
2721 	cvmx_write_csr(isc_ctl_addr, 0);
2722 	if (en) {
2723 		unsigned int idt = per_cpu(octeon_irq_ciu3_idt_ip3, cpu);
2724 
2725 		isc_ctl.u64 = 0;
2726 		isc_ctl.s.en = 1;
2727 		isc_ctl.s.idt = idt;
2728 		cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2729 	}
2730 	cvmx_read_csr(isc_ctl_addr);
2731 }
2732 
2733 static void octeon_irq_ciu3_mbox_enable(struct irq_data *data)
2734 {
2735 	int cpu;
2736 	unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2737 
2738 	WARN_ON(mbox >= CIU3_MBOX_PER_CORE);
2739 
2740 	for_each_online_cpu(cpu)
2741 		octeon_irq_ciu3_mbox_set_enable(data, cpu, true);
2742 }
2743 
2744 static void octeon_irq_ciu3_mbox_disable(struct irq_data *data)
2745 {
2746 	int cpu;
2747 	unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2748 
2749 	WARN_ON(mbox >= CIU3_MBOX_PER_CORE);
2750 
2751 	for_each_online_cpu(cpu)
2752 		octeon_irq_ciu3_mbox_set_enable(data, cpu, false);
2753 }
2754 
2755 static void octeon_irq_ciu3_mbox_ack(struct irq_data *data)
2756 {
2757 	struct octeon_ciu3_info *ciu3_info;
2758 	unsigned int intsn;
2759 	u64 isc_w1c_addr;
2760 	union cvmx_ciu3_iscx_w1c isc_w1c;
2761 	unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2762 
2763 	intsn = octeon_irq_ciu3_mbox_intsn_for_core(cvmx_get_local_core_num(), mbox);
2764 
2765 	isc_w1c.u64 = 0;
2766 	isc_w1c.s.raw = 1;
2767 
2768 	ciu3_info = __this_cpu_read(octeon_ciu3_info);
2769 	isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
2770 	cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2771 	cvmx_read_csr(isc_w1c_addr);
2772 }
2773 
2774 static void octeon_irq_ciu3_mbox_cpu_online(struct irq_data *data)
2775 {
2776 	octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), true);
2777 }
2778 
2779 static void octeon_irq_ciu3_mbox_cpu_offline(struct irq_data *data)
2780 {
2781 	octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), false);
2782 }
2783 
2784 static int octeon_irq_ciu3_alloc_resources(struct octeon_ciu3_info *ciu3_info)
2785 {
2786 	u64 b = ciu3_info->ciu3_addr;
2787 	int idt_ip2, idt_ip3, idt_ip4;
2788 	int unused_idt2;
2789 	int core = cvmx_get_local_core_num();
2790 	int i;
2791 
2792 	__this_cpu_write(octeon_ciu3_info, ciu3_info);
2793 
2794 	/*
2795 	 * 4 idt per core starting from 1 because zero is reserved.
2796 	 * Base idt per core is 4 * core + 1
2797 	 */
2798 	idt_ip2 = core * 4 + 1;
2799 	idt_ip3 = core * 4 + 2;
2800 	idt_ip4 = core * 4 + 3;
2801 	unused_idt2 = core * 4 + 4;
2802 	__this_cpu_write(octeon_irq_ciu3_idt_ip2, idt_ip2);
2803 	__this_cpu_write(octeon_irq_ciu3_idt_ip3, idt_ip3);
2804 
2805 	/* ip2 interrupts for this CPU */
2806 	cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip2), 0);
2807 	cvmx_write_csr(b + CIU3_IDT_PP(idt_ip2, 0), 1ull << core);
2808 	cvmx_write_csr(b + CIU3_IDT_IO(idt_ip2), 0);
2809 
2810 	/* ip3 interrupts for this CPU */
2811 	cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip3), 1);
2812 	cvmx_write_csr(b + CIU3_IDT_PP(idt_ip3, 0), 1ull << core);
2813 	cvmx_write_csr(b + CIU3_IDT_IO(idt_ip3), 0);
2814 
2815 	/* ip4 interrupts for this CPU */
2816 	cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip4), 2);
2817 	cvmx_write_csr(b + CIU3_IDT_PP(idt_ip4, 0), 0);
2818 	cvmx_write_csr(b + CIU3_IDT_IO(idt_ip4), 0);
2819 
2820 	cvmx_write_csr(b + CIU3_IDT_CTL(unused_idt2), 0);
2821 	cvmx_write_csr(b + CIU3_IDT_PP(unused_idt2, 0), 0);
2822 	cvmx_write_csr(b + CIU3_IDT_IO(unused_idt2), 0);
2823 
2824 	for (i = 0; i < CIU3_MBOX_PER_CORE; i++) {
2825 		unsigned int intsn = octeon_irq_ciu3_mbox_intsn_for_core(core, i);
2826 
2827 		cvmx_write_csr(b + CIU3_ISC_W1C(intsn), 2);
2828 		cvmx_write_csr(b + CIU3_ISC_CTL(intsn), 0);
2829 	}
2830 
2831 	return 0;
2832 }
2833 
2834 static void octeon_irq_setup_secondary_ciu3(void)
2835 {
2836 	struct octeon_ciu3_info *ciu3_info;
2837 
2838 	ciu3_info = octeon_ciu3_info_per_node[cvmx_get_node_num()];
2839 	octeon_irq_ciu3_alloc_resources(ciu3_info);
2840 	irq_cpu_online();
2841 
2842 	/* Enable the CIU lines */
2843 	set_c0_status(STATUSF_IP3 | STATUSF_IP2);
2844 	if (octeon_irq_use_ip4)
2845 		set_c0_status(STATUSF_IP4);
2846 	else
2847 		clear_c0_status(STATUSF_IP4);
2848 }
2849 
2850 static struct irq_chip octeon_irq_chip_ciu3_mbox = {
2851 	.name = "CIU3-M",
2852 	.irq_enable = octeon_irq_ciu3_mbox_enable,
2853 	.irq_disable = octeon_irq_ciu3_mbox_disable,
2854 	.irq_ack = octeon_irq_ciu3_mbox_ack,
2855 
2856 	.irq_cpu_online = octeon_irq_ciu3_mbox_cpu_online,
2857 	.irq_cpu_offline = octeon_irq_ciu3_mbox_cpu_offline,
2858 	.flags = IRQCHIP_ONOFFLINE_ENABLED,
2859 };
2860 
2861 static int __init octeon_irq_init_ciu3(struct device_node *ciu_node,
2862 				       struct device_node *parent)
2863 {
2864 	int i;
2865 	int node;
2866 	struct irq_domain *domain;
2867 	struct octeon_ciu3_info *ciu3_info;
2868 	const __be32 *zero_addr;
2869 	u64 base_addr;
2870 	union cvmx_ciu3_const consts;
2871 
2872 	node = 0; /* of_node_to_nid(ciu_node); */
2873 	ciu3_info = kzalloc_node(sizeof(*ciu3_info), GFP_KERNEL, node);
2874 
2875 	if (!ciu3_info)
2876 		return -ENOMEM;
2877 
2878 	zero_addr = of_get_address(ciu_node, 0, NULL, NULL);
2879 	if (WARN_ON(!zero_addr))
2880 		return -EINVAL;
2881 
2882 	base_addr = of_translate_address(ciu_node, zero_addr);
2883 	base_addr = (u64)phys_to_virt(base_addr);
2884 
2885 	ciu3_info->ciu3_addr = base_addr;
2886 	ciu3_info->node = node;
2887 
2888 	consts.u64 = cvmx_read_csr(base_addr + CIU3_CONST);
2889 
2890 	octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu3;
2891 
2892 	octeon_irq_ip2 = octeon_irq_ciu3_ip2;
2893 	octeon_irq_ip3 = octeon_irq_ciu3_mbox;
2894 	octeon_irq_ip4 = octeon_irq_ip4_mask;
2895 
2896 	if (node == cvmx_get_node_num()) {
2897 		/* Mips internal */
2898 		octeon_irq_init_core();
2899 
2900 		/* Only do per CPU things if it is the CIU of the boot node. */
2901 		i = irq_alloc_descs_from(OCTEON_IRQ_MBOX0, 8, node);
2902 		WARN_ON(i < 0);
2903 
2904 		for (i = 0; i < 8; i++)
2905 			irq_set_chip_and_handler(i + OCTEON_IRQ_MBOX0,
2906 						 &octeon_irq_chip_ciu3_mbox, handle_percpu_irq);
2907 	}
2908 
2909 	/*
2910 	 * Initialize all domains to use the default domain. Specific major
2911 	 * blocks will overwrite the default domain as needed.
2912 	 */
2913 	domain = irq_domain_add_tree(ciu_node, &octeon_dflt_domain_ciu3_ops,
2914 				     ciu3_info);
2915 	for (i = 0; i < MAX_CIU3_DOMAINS; i++)
2916 		ciu3_info->domain[i] = domain;
2917 
2918 	octeon_ciu3_info_per_node[node] = ciu3_info;
2919 
2920 	if (node == cvmx_get_node_num()) {
2921 		/* Only do per CPU things if it is the CIU of the boot node. */
2922 		octeon_irq_ciu3_alloc_resources(ciu3_info);
2923 		if (node == 0)
2924 			irq_set_default_host(domain);
2925 
2926 		octeon_irq_use_ip4 = false;
2927 		/* Enable the CIU lines */
2928 		set_c0_status(STATUSF_IP2 | STATUSF_IP3);
2929 		clear_c0_status(STATUSF_IP4);
2930 	}
2931 
2932 	return 0;
2933 }
2934 
2935 static struct of_device_id ciu_types[] __initdata = {
2936 	{.compatible = "cavium,octeon-3860-ciu", .data = octeon_irq_init_ciu},
2937 	{.compatible = "cavium,octeon-3860-gpio", .data = octeon_irq_init_gpio},
2938 	{.compatible = "cavium,octeon-6880-ciu2", .data = octeon_irq_init_ciu2},
2939 	{.compatible = "cavium,octeon-7890-ciu3", .data = octeon_irq_init_ciu3},
2940 	{.compatible = "cavium,octeon-7130-cib", .data = octeon_irq_init_cib},
2941 	{}
2942 };
2943 
2944 void __init arch_init_irq(void)
2945 {
2946 #ifdef CONFIG_SMP
2947 	/* Set the default affinity to the boot cpu. */
2948 	cpumask_clear(irq_default_affinity);
2949 	cpumask_set_cpu(smp_processor_id(), irq_default_affinity);
2950 #endif
2951 	of_irq_init(ciu_types);
2952 }
2953 
2954 asmlinkage void plat_irq_dispatch(void)
2955 {
2956 	unsigned long cop0_cause;
2957 	unsigned long cop0_status;
2958 
2959 	while (1) {
2960 		cop0_cause = read_c0_cause();
2961 		cop0_status = read_c0_status();
2962 		cop0_cause &= cop0_status;
2963 		cop0_cause &= ST0_IM;
2964 
2965 		if (cop0_cause & STATUSF_IP2)
2966 			octeon_irq_ip2();
2967 		else if (cop0_cause & STATUSF_IP3)
2968 			octeon_irq_ip3();
2969 		else if (cop0_cause & STATUSF_IP4)
2970 			octeon_irq_ip4();
2971 		else if (cop0_cause)
2972 			do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE);
2973 		else
2974 			break;
2975 	}
2976 }
2977 
2978 #ifdef CONFIG_HOTPLUG_CPU
2979 
2980 void octeon_fixup_irqs(void)
2981 {
2982 	irq_cpu_offline();
2983 }
2984 
2985 #endif /* CONFIG_HOTPLUG_CPU */
2986 
2987 struct irq_domain *octeon_irq_get_block_domain(int node, uint8_t block)
2988 {
2989 	struct octeon_ciu3_info *ciu3_info;
2990 
2991 	ciu3_info = octeon_ciu3_info_per_node[node & CVMX_NODE_MASK];
2992 	return ciu3_info->domain[block];
2993 }
2994 EXPORT_SYMBOL(octeon_irq_get_block_domain);
2995