1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * PS3 interrupt routines.
4 *
5 * Copyright (C) 2006 Sony Computer Entertainment Inc.
6 * Copyright 2006 Sony Corp.
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/export.h>
11 #include <linux/irq.h>
12 #include <linux/irqdomain.h>
13
14 #include <asm/machdep.h>
15 #include <asm/udbg.h>
16 #include <asm/lv1call.h>
17 #include <asm/smp.h>
18
19 #include "platform.h"
20
21 #if defined(DEBUG)
22 #define DBG udbg_printf
23 #define FAIL udbg_printf
24 #else
25 #define DBG pr_devel
26 #define FAIL pr_debug
27 #endif
28
29 /**
30 * struct ps3_bmp - a per cpu irq status and mask bitmap structure
31 * @status: 256 bit status bitmap indexed by plug
32 * @unused_1: Alignment
33 * @mask: 256 bit mask bitmap indexed by plug
34 * @unused_2: Alignment
35 *
36 * The HV maintains per SMT thread mappings of HV outlet to HV plug on
37 * behalf of the guest. These mappings are implemented as 256 bit guest
38 * supplied bitmaps indexed by plug number. The addresses of the bitmaps
39 * are registered with the HV through lv1_configure_irq_state_bitmap().
40 * The HV requires that the 512 bits of status + mask not cross a page
41 * boundary. PS3_BMP_MINALIGN is used to define this minimal 64 byte
42 * alignment.
43 *
44 * The HV supports 256 plugs per thread, assigned as {0..255}, for a total
45 * of 512 plugs supported on a processor. To simplify the logic this
46 * implementation equates HV plug value to Linux virq value, constrains each
47 * interrupt to have a system wide unique plug number, and limits the range
48 * of the plug values to map into the first dword of the bitmaps. This
49 * gives a usable range of plug values of {NR_IRQS_LEGACY..63}. Note
50 * that there is no constraint on how many in this set an individual thread
51 * can acquire.
52 *
53 * The mask is declared as unsigned long so we can use set/clear_bit on it.
54 */
55
56 #define PS3_BMP_MINALIGN 64
57
58 struct ps3_bmp {
59 struct {
60 u64 status;
61 u64 unused_1[3];
62 unsigned long mask;
63 u64 unused_2[3];
64 };
65 };
66
67 /**
68 * struct ps3_private - a per cpu data structure
69 * @bmp: ps3_bmp structure
70 * @bmp_lock: Synchronize access to bmp.
71 * @ipi_debug_brk_mask: Mask for debug break IPIs
72 * @ppe_id: HV logical_ppe_id
73 * @thread_id: HV thread_id
74 * @ipi_mask: Mask of IPI virqs
75 */
76
77 struct ps3_private {
78 struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN)));
79 spinlock_t bmp_lock;
80 u64 ppe_id;
81 u64 thread_id;
82 unsigned long ipi_debug_brk_mask;
83 unsigned long ipi_mask;
84 };
85
86 static DEFINE_PER_CPU(struct ps3_private, ps3_private);
87
88 /**
89 * ps3_chip_mask - Set an interrupt mask bit in ps3_bmp.
90 * @virq: The assigned Linux virq.
91 *
92 * Sets ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
93 */
94
ps3_chip_mask(struct irq_data * d)95 static void ps3_chip_mask(struct irq_data *d)
96 {
97 struct ps3_private *pd = irq_data_get_irq_chip_data(d);
98 unsigned long flags;
99
100 DBG("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__,
101 pd->thread_id, d->irq);
102
103 local_irq_save(flags);
104 clear_bit(63 - d->irq, &pd->bmp.mask);
105 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
106 local_irq_restore(flags);
107 }
108
109 /**
110 * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
111 * @virq: The assigned Linux virq.
112 *
113 * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
114 */
115
ps3_chip_unmask(struct irq_data * d)116 static void ps3_chip_unmask(struct irq_data *d)
117 {
118 struct ps3_private *pd = irq_data_get_irq_chip_data(d);
119 unsigned long flags;
120
121 DBG("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__,
122 pd->thread_id, d->irq);
123
124 local_irq_save(flags);
125 set_bit(63 - d->irq, &pd->bmp.mask);
126 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
127 local_irq_restore(flags);
128 }
129
130 /**
131 * ps3_chip_eoi - HV end-of-interrupt.
132 * @virq: The assigned Linux virq.
133 *
134 * Calls lv1_end_of_interrupt_ext().
135 */
136
ps3_chip_eoi(struct irq_data * d)137 static void ps3_chip_eoi(struct irq_data *d)
138 {
139 const struct ps3_private *pd = irq_data_get_irq_chip_data(d);
140
141 /* non-IPIs are EOIed here. */
142
143 if (!test_bit(63 - d->irq, &pd->ipi_mask))
144 lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, d->irq);
145 }
146
147 /**
148 * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
149 */
150
151 static struct irq_chip ps3_irq_chip = {
152 .name = "ps3",
153 .irq_mask = ps3_chip_mask,
154 .irq_unmask = ps3_chip_unmask,
155 .irq_eoi = ps3_chip_eoi,
156 };
157
158 /**
159 * ps3_virq_setup - virq related setup.
160 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
161 * serviced on.
162 * @outlet: The HV outlet from the various create outlet routines.
163 * @virq: The assigned Linux virq.
164 *
165 * Calls irq_create_mapping() to get a virq and sets the chip data to
166 * ps3_private data.
167 */
168
ps3_virq_setup(enum ps3_cpu_binding cpu,unsigned long outlet,unsigned int * virq)169 static int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
170 unsigned int *virq)
171 {
172 int result;
173 struct ps3_private *pd;
174
175 /* This defines the default interrupt distribution policy. */
176
177 if (cpu == PS3_BINDING_CPU_ANY)
178 cpu = 0;
179
180 pd = &per_cpu(ps3_private, cpu);
181
182 *virq = irq_create_mapping(NULL, outlet);
183
184 if (!*virq) {
185 FAIL("%s:%d: irq_create_mapping failed: outlet %lu\n",
186 __func__, __LINE__, outlet);
187 result = -ENOMEM;
188 goto fail_create;
189 }
190
191 DBG("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
192 outlet, cpu, *virq);
193
194 result = irq_set_chip_data(*virq, pd);
195
196 if (result) {
197 FAIL("%s:%d: irq_set_chip_data failed\n",
198 __func__, __LINE__);
199 goto fail_set;
200 }
201
202 ps3_chip_mask(irq_get_irq_data(*virq));
203
204 return result;
205
206 fail_set:
207 irq_dispose_mapping(*virq);
208 fail_create:
209 return result;
210 }
211
212 /**
213 * ps3_virq_destroy - virq related teardown.
214 * @virq: The assigned Linux virq.
215 *
216 * Clears chip data and calls irq_dispose_mapping() for the virq.
217 */
218
ps3_virq_destroy(unsigned int virq)219 static int ps3_virq_destroy(unsigned int virq)
220 {
221 const struct ps3_private *pd = irq_get_chip_data(virq);
222
223 DBG("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__,
224 __LINE__, pd->ppe_id, pd->thread_id, virq);
225
226 irq_set_chip_data(virq, NULL);
227 irq_dispose_mapping(virq);
228
229 DBG("%s:%d <-\n", __func__, __LINE__);
230 return 0;
231 }
232
233 /**
234 * ps3_irq_plug_setup - Generic outlet and virq related setup.
235 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
236 * serviced on.
237 * @outlet: The HV outlet from the various create outlet routines.
238 * @virq: The assigned Linux virq.
239 *
240 * Sets up virq and connects the irq plug.
241 */
242
ps3_irq_plug_setup(enum ps3_cpu_binding cpu,unsigned long outlet,unsigned int * virq)243 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
244 unsigned int *virq)
245 {
246 int result;
247 struct ps3_private *pd;
248
249 result = ps3_virq_setup(cpu, outlet, virq);
250
251 if (result) {
252 FAIL("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
253 goto fail_setup;
254 }
255
256 pd = irq_get_chip_data(*virq);
257
258 /* Binds outlet to cpu + virq. */
259
260 result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq,
261 outlet, 0);
262
263 if (result) {
264 FAIL("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
265 __func__, __LINE__, ps3_result(result));
266 result = -EPERM;
267 goto fail_connect;
268 }
269
270 return result;
271
272 fail_connect:
273 ps3_virq_destroy(*virq);
274 fail_setup:
275 return result;
276 }
277 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
278
279 /**
280 * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
281 * @virq: The assigned Linux virq.
282 *
283 * Disconnects the irq plug and tears down virq.
284 * Do not call for system bus event interrupts setup with
285 * ps3_sb_event_receive_port_setup().
286 */
287
ps3_irq_plug_destroy(unsigned int virq)288 int ps3_irq_plug_destroy(unsigned int virq)
289 {
290 int result;
291 const struct ps3_private *pd = irq_get_chip_data(virq);
292
293 DBG("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__,
294 __LINE__, pd->ppe_id, pd->thread_id, virq);
295
296 ps3_chip_mask(irq_get_irq_data(virq));
297
298 result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq);
299
300 if (result)
301 FAIL("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
302 __func__, __LINE__, ps3_result(result));
303
304 ps3_virq_destroy(virq);
305
306 return result;
307 }
308 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
309
310 /**
311 * ps3_event_receive_port_setup - Setup an event receive port.
312 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
313 * serviced on.
314 * @virq: The assigned Linux virq.
315 *
316 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
317 * arrange to receive interrupts from system-bus devices, or with
318 * ps3_send_event_locally() to signal events.
319 */
320
ps3_event_receive_port_setup(enum ps3_cpu_binding cpu,unsigned int * virq)321 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
322 {
323 int result;
324 u64 outlet;
325
326 result = lv1_construct_event_receive_port(&outlet);
327
328 if (result) {
329 FAIL("%s:%d: lv1_construct_event_receive_port failed: %s\n",
330 __func__, __LINE__, ps3_result(result));
331 *virq = 0;
332 return result;
333 }
334
335 result = ps3_irq_plug_setup(cpu, outlet, virq);
336 BUG_ON(result);
337
338 return result;
339 }
340 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
341
342 /**
343 * ps3_event_receive_port_destroy - Destroy an event receive port.
344 * @virq: The assigned Linux virq.
345 *
346 * Since ps3_event_receive_port_destroy destroys the receive port outlet,
347 * SB devices need to call disconnect_interrupt_event_receive_port() before
348 * this.
349 */
350
ps3_event_receive_port_destroy(unsigned int virq)351 int ps3_event_receive_port_destroy(unsigned int virq)
352 {
353 int result;
354
355 DBG(" -> %s:%d virq %u\n", __func__, __LINE__, virq);
356
357 ps3_chip_mask(irq_get_irq_data(virq));
358
359 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
360
361 if (result)
362 FAIL("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
363 __func__, __LINE__, ps3_result(result));
364
365 /*
366 * Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu()
367 * calls from interrupt context (smp_call_function) when kexecing.
368 */
369
370 DBG(" <- %s:%d\n", __func__, __LINE__);
371 return result;
372 }
373
ps3_send_event_locally(unsigned int virq)374 int ps3_send_event_locally(unsigned int virq)
375 {
376 return lv1_send_event_locally(virq_to_hw(virq));
377 }
378
379 /**
380 * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
381 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
382 * serviced on.
383 * @dev: The system bus device instance.
384 * @virq: The assigned Linux virq.
385 *
386 * An event irq represents a virtual device interrupt. The interrupt_id
387 * coresponds to the software interrupt number.
388 */
389
ps3_sb_event_receive_port_setup(struct ps3_system_bus_device * dev,enum ps3_cpu_binding cpu,unsigned int * virq)390 int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev,
391 enum ps3_cpu_binding cpu, unsigned int *virq)
392 {
393 /* this should go in system-bus.c */
394
395 int result;
396
397 result = ps3_event_receive_port_setup(cpu, virq);
398
399 if (result)
400 return result;
401
402 result = lv1_connect_interrupt_event_receive_port(dev->bus_id,
403 dev->dev_id, virq_to_hw(*virq), dev->interrupt_id);
404
405 if (result) {
406 FAIL("%s:%d: lv1_connect_interrupt_event_receive_port"
407 " failed: %s\n", __func__, __LINE__,
408 ps3_result(result));
409 ps3_event_receive_port_destroy(*virq);
410 *virq = 0;
411 return result;
412 }
413
414 DBG("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
415 dev->interrupt_id, *virq);
416
417 return 0;
418 }
419 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
420
ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device * dev,unsigned int virq)421 int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev,
422 unsigned int virq)
423 {
424 /* this should go in system-bus.c */
425
426 int result;
427
428 DBG(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
429 dev->interrupt_id, virq);
430
431 result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id,
432 dev->dev_id, virq_to_hw(virq), dev->interrupt_id);
433
434 if (result)
435 FAIL("%s:%d: lv1_disconnect_interrupt_event_receive_port"
436 " failed: %s\n", __func__, __LINE__,
437 ps3_result(result));
438
439 result = ps3_event_receive_port_destroy(virq);
440 BUG_ON(result);
441
442 /*
443 * ps3_event_receive_port_destroy() destroys the IRQ plug,
444 * so don't call ps3_irq_plug_destroy() here.
445 */
446
447 result = ps3_virq_destroy(virq);
448 BUG_ON(result);
449
450 DBG(" <- %s:%d\n", __func__, __LINE__);
451 return result;
452 }
453 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
454
455 /**
456 * ps3_io_irq_setup - Setup a system bus io irq.
457 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
458 * serviced on.
459 * @interrupt_id: The device interrupt id read from the system repository.
460 * @virq: The assigned Linux virq.
461 *
462 * An io irq represents a non-virtualized device interrupt. interrupt_id
463 * coresponds to the interrupt number of the interrupt controller.
464 */
465
ps3_io_irq_setup(enum ps3_cpu_binding cpu,unsigned int interrupt_id,unsigned int * virq)466 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
467 unsigned int *virq)
468 {
469 int result;
470 u64 outlet;
471
472 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
473
474 if (result) {
475 FAIL("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
476 __func__, __LINE__, ps3_result(result));
477 return result;
478 }
479
480 result = ps3_irq_plug_setup(cpu, outlet, virq);
481 BUG_ON(result);
482
483 return result;
484 }
485 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
486
ps3_io_irq_destroy(unsigned int virq)487 int ps3_io_irq_destroy(unsigned int virq)
488 {
489 int result;
490 unsigned long outlet = virq_to_hw(virq);
491
492 ps3_chip_mask(irq_get_irq_data(virq));
493
494 /*
495 * lv1_destruct_io_irq_outlet() will destroy the IRQ plug,
496 * so call ps3_irq_plug_destroy() first.
497 */
498
499 result = ps3_irq_plug_destroy(virq);
500 BUG_ON(result);
501
502 result = lv1_destruct_io_irq_outlet(outlet);
503
504 if (result)
505 FAIL("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
506 __func__, __LINE__, ps3_result(result));
507
508 return result;
509 }
510 EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
511
512 /**
513 * ps3_vuart_irq_setup - Setup the system virtual uart virq.
514 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
515 * serviced on.
516 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
517 * @virq: The assigned Linux virq.
518 *
519 * The system supports only a single virtual uart, so multiple calls without
520 * freeing the interrupt will return a wrong state error.
521 */
522
ps3_vuart_irq_setup(enum ps3_cpu_binding cpu,void * virt_addr_bmp,unsigned int * virq)523 int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
524 unsigned int *virq)
525 {
526 int result;
527 u64 outlet;
528 u64 lpar_addr;
529
530 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
531
532 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
533
534 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
535
536 if (result) {
537 FAIL("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
538 __func__, __LINE__, ps3_result(result));
539 return result;
540 }
541
542 result = ps3_irq_plug_setup(cpu, outlet, virq);
543 BUG_ON(result);
544
545 return result;
546 }
547 EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup);
548
ps3_vuart_irq_destroy(unsigned int virq)549 int ps3_vuart_irq_destroy(unsigned int virq)
550 {
551 int result;
552
553 ps3_chip_mask(irq_get_irq_data(virq));
554 result = lv1_deconfigure_virtual_uart_irq();
555
556 if (result) {
557 FAIL("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
558 __func__, __LINE__, ps3_result(result));
559 return result;
560 }
561
562 result = ps3_irq_plug_destroy(virq);
563 BUG_ON(result);
564
565 return result;
566 }
567 EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy);
568
569 /**
570 * ps3_spe_irq_setup - Setup an spe virq.
571 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
572 * serviced on.
573 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
574 * @class: The spe interrupt class {0,1,2}.
575 * @virq: The assigned Linux virq.
576 *
577 */
578
ps3_spe_irq_setup(enum ps3_cpu_binding cpu,unsigned long spe_id,unsigned int class,unsigned int * virq)579 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
580 unsigned int class, unsigned int *virq)
581 {
582 int result;
583 u64 outlet;
584
585 BUG_ON(class > 2);
586
587 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
588
589 if (result) {
590 FAIL("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
591 __func__, __LINE__, ps3_result(result));
592 return result;
593 }
594
595 result = ps3_irq_plug_setup(cpu, outlet, virq);
596 BUG_ON(result);
597
598 return result;
599 }
600
ps3_spe_irq_destroy(unsigned int virq)601 int ps3_spe_irq_destroy(unsigned int virq)
602 {
603 int result;
604
605 ps3_chip_mask(irq_get_irq_data(virq));
606
607 result = ps3_irq_plug_destroy(virq);
608 BUG_ON(result);
609
610 return result;
611 }
612
613
614 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
615 #define PS3_PLUG_MAX 63
616
617 #if defined(DEBUG)
_dump_64_bmp(const char * header,const u64 * p,unsigned cpu,const char * func,int line)618 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
619 const char* func, int line)
620 {
621 pr_debug("%s:%d: %s %u {%04llx_%04llx_%04llx_%04llx}\n",
622 func, line, header, cpu,
623 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
624 *p & 0xffff);
625 }
626
_dump_256_bmp(const char * header,const u64 * p,unsigned cpu,const char * func,int line)627 static void __maybe_unused _dump_256_bmp(const char *header,
628 const u64 *p, unsigned cpu, const char* func, int line)
629 {
630 pr_debug("%s:%d: %s %u {%016llx:%016llx:%016llx:%016llx}\n",
631 func, line, header, cpu, p[0], p[1], p[2], p[3]);
632 }
633
634 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
_dump_bmp(struct ps3_private * pd,const char * func,int line)635 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
636 {
637 unsigned long flags;
638
639 spin_lock_irqsave(&pd->bmp_lock, flags);
640 _dump_64_bmp("stat", &pd->bmp.status, pd->thread_id, func, line);
641 _dump_64_bmp("mask", (u64*)&pd->bmp.mask, pd->thread_id, func, line);
642 spin_unlock_irqrestore(&pd->bmp_lock, flags);
643 }
644
645 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
_dump_mask(struct ps3_private * pd,const char * func,int line)646 static void __maybe_unused _dump_mask(struct ps3_private *pd,
647 const char* func, int line)
648 {
649 unsigned long flags;
650
651 spin_lock_irqsave(&pd->bmp_lock, flags);
652 _dump_64_bmp("mask", (u64*)&pd->bmp.mask, pd->thread_id, func, line);
653 spin_unlock_irqrestore(&pd->bmp_lock, flags);
654 }
655 #else
dump_bmp(struct ps3_private * pd)656 static void dump_bmp(struct ps3_private* pd) {};
657 #endif /* defined(DEBUG) */
658
ps3_host_map(struct irq_domain * h,unsigned int virq,irq_hw_number_t hwirq)659 static int ps3_host_map(struct irq_domain *h, unsigned int virq,
660 irq_hw_number_t hwirq)
661 {
662 DBG("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
663 virq);
664
665 irq_set_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
666
667 return 0;
668 }
669
ps3_host_match(struct irq_domain * h,struct device_node * np,enum irq_domain_bus_token bus_token)670 static int ps3_host_match(struct irq_domain *h, struct device_node *np,
671 enum irq_domain_bus_token bus_token)
672 {
673 /* Match all */
674 return 1;
675 }
676
677 static const struct irq_domain_ops ps3_host_ops = {
678 .map = ps3_host_map,
679 .match = ps3_host_match,
680 };
681
ps3_register_ipi_debug_brk(unsigned int cpu,unsigned int virq)682 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
683 {
684 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
685
686 set_bit(63 - virq, &pd->ipi_debug_brk_mask);
687
688 DBG("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
689 cpu, virq, pd->ipi_debug_brk_mask);
690 }
691
ps3_register_ipi_irq(unsigned int cpu,unsigned int virq)692 void __init ps3_register_ipi_irq(unsigned int cpu, unsigned int virq)
693 {
694 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
695
696 set_bit(63 - virq, &pd->ipi_mask);
697
698 DBG("%s:%d: cpu %u, virq %u, ipi_mask %lxh\n", __func__, __LINE__,
699 cpu, virq, pd->ipi_mask);
700 }
701
ps3_get_irq(void)702 static unsigned int ps3_get_irq(void)
703 {
704 struct ps3_private *pd = this_cpu_ptr(&ps3_private);
705 u64 x = (pd->bmp.status & pd->bmp.mask);
706 unsigned int plug;
707
708 /* check for ipi break first to stop this cpu ASAP */
709
710 if (x & pd->ipi_debug_brk_mask)
711 x &= pd->ipi_debug_brk_mask;
712
713 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
714 plug &= 0x3f;
715
716 if (unlikely(!plug)) {
717 DBG("%s:%d: no plug found: thread_id %llu\n", __func__,
718 __LINE__, pd->thread_id);
719 dump_bmp(&per_cpu(ps3_private, 0));
720 dump_bmp(&per_cpu(ps3_private, 1));
721 return 0;
722 }
723
724 #if defined(DEBUG)
725 if (unlikely(plug < NR_IRQS_LEGACY || plug > PS3_PLUG_MAX)) {
726 dump_bmp(&per_cpu(ps3_private, 0));
727 dump_bmp(&per_cpu(ps3_private, 1));
728 BUG();
729 }
730 #endif
731
732 /* IPIs are EOIed here. */
733
734 if (test_bit(63 - plug, &pd->ipi_mask))
735 lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, plug);
736
737 return plug;
738 }
739
ps3_init_IRQ(void)740 void __init ps3_init_IRQ(void)
741 {
742 int result;
743 unsigned cpu;
744 struct irq_domain *host;
745
746 host = irq_domain_add_nomap(NULL, PS3_PLUG_MAX + 1, &ps3_host_ops, NULL);
747 irq_set_default_host(host);
748
749 for_each_possible_cpu(cpu) {
750 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
751
752 lv1_get_logical_ppe_id(&pd->ppe_id);
753 pd->thread_id = get_hard_smp_processor_id(cpu);
754 spin_lock_init(&pd->bmp_lock);
755
756 DBG("%s:%d: ppe_id %llu, thread_id %llu, bmp %lxh\n",
757 __func__, __LINE__, pd->ppe_id, pd->thread_id,
758 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
759
760 result = lv1_configure_irq_state_bitmap(pd->ppe_id,
761 pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
762
763 if (result)
764 FAIL("%s:%d: lv1_configure_irq_state_bitmap failed:"
765 " %s\n", __func__, __LINE__,
766 ps3_result(result));
767 }
768
769 ppc_md.get_irq = ps3_get_irq;
770 }
771
ps3_shutdown_IRQ(int cpu)772 void ps3_shutdown_IRQ(int cpu)
773 {
774 int result;
775 u64 ppe_id;
776 u64 thread_id = get_hard_smp_processor_id(cpu);
777
778 lv1_get_logical_ppe_id(&ppe_id);
779 result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
780
781 DBG("%s:%d: lv1_configure_irq_state_bitmap (%llu:%llu/%d) %s\n", __func__,
782 __LINE__, ppe_id, thread_id, cpu, ps3_result(result));
783 }
784