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awilliam
GitHub Repository: awilliam/linux-vfio
Path: blob/master/arch/powerpc/platforms/ps3/interrupt.c
10818 views
1
/*
2
* PS3 interrupt routines.
3
*
4
* Copyright (C) 2006 Sony Computer Entertainment Inc.
5
* Copyright 2006 Sony Corp.
6
*
7
* This program is free software; you can redistribute it and/or modify
8
* it under the terms of the GNU General Public License as published by
9
* the Free Software Foundation; version 2 of the License.
10
*
11
* This program is distributed in the hope that it will be useful,
12
* but WITHOUT ANY WARRANTY; without even the implied warranty of
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14
* GNU General Public License for more details.
15
*
16
* You should have received a copy of the GNU General Public License
17
* along with this program; if not, write to the Free Software
18
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19
*/
20
21
#include <linux/kernel.h>
22
#include <linux/module.h>
23
#include <linux/irq.h>
24
25
#include <asm/machdep.h>
26
#include <asm/udbg.h>
27
#include <asm/lv1call.h>
28
#include <asm/smp.h>
29
30
#include "platform.h"
31
32
#if defined(DEBUG)
33
#define DBG udbg_printf
34
#else
35
#define DBG pr_debug
36
#endif
37
38
/**
39
* struct ps3_bmp - a per cpu irq status and mask bitmap structure
40
* @status: 256 bit status bitmap indexed by plug
41
* @unused_1:
42
* @mask: 256 bit mask bitmap indexed by plug
43
* @unused_2:
44
* @lock:
45
* @ipi_debug_brk_mask:
46
*
47
* The HV maintains per SMT thread mappings of HV outlet to HV plug on
48
* behalf of the guest. These mappings are implemented as 256 bit guest
49
* supplied bitmaps indexed by plug number. The addresses of the bitmaps
50
* are registered with the HV through lv1_configure_irq_state_bitmap().
51
* The HV requires that the 512 bits of status + mask not cross a page
52
* boundary. PS3_BMP_MINALIGN is used to define this minimal 64 byte
53
* alignment.
54
*
55
* The HV supports 256 plugs per thread, assigned as {0..255}, for a total
56
* of 512 plugs supported on a processor. To simplify the logic this
57
* implementation equates HV plug value to Linux virq value, constrains each
58
* interrupt to have a system wide unique plug number, and limits the range
59
* of the plug values to map into the first dword of the bitmaps. This
60
* gives a usable range of plug values of {NUM_ISA_INTERRUPTS..63}. Note
61
* that there is no constraint on how many in this set an individual thread
62
* can acquire.
63
*
64
* The mask is declared as unsigned long so we can use set/clear_bit on it.
65
*/
66
67
#define PS3_BMP_MINALIGN 64
68
69
struct ps3_bmp {
70
struct {
71
u64 status;
72
u64 unused_1[3];
73
unsigned long mask;
74
u64 unused_2[3];
75
};
76
u64 ipi_debug_brk_mask;
77
spinlock_t lock;
78
};
79
80
/**
81
* struct ps3_private - a per cpu data structure
82
* @bmp: ps3_bmp structure
83
* @ppe_id: HV logical_ppe_id
84
* @thread_id: HV thread_id
85
*/
86
87
struct ps3_private {
88
struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN)));
89
u64 ppe_id;
90
u64 thread_id;
91
};
92
93
static DEFINE_PER_CPU(struct ps3_private, ps3_private);
94
95
/**
96
* ps3_chip_mask - Set an interrupt mask bit in ps3_bmp.
97
* @virq: The assigned Linux virq.
98
*
99
* Sets ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
100
*/
101
102
static void ps3_chip_mask(struct irq_data *d)
103
{
104
struct ps3_private *pd = irq_data_get_irq_chip_data(d);
105
unsigned long flags;
106
107
pr_debug("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__,
108
pd->thread_id, d->irq);
109
110
local_irq_save(flags);
111
clear_bit(63 - d->irq, &pd->bmp.mask);
112
lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
113
local_irq_restore(flags);
114
}
115
116
/**
117
* ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
118
* @virq: The assigned Linux virq.
119
*
120
* Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
121
*/
122
123
static void ps3_chip_unmask(struct irq_data *d)
124
{
125
struct ps3_private *pd = irq_data_get_irq_chip_data(d);
126
unsigned long flags;
127
128
pr_debug("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__,
129
pd->thread_id, d->irq);
130
131
local_irq_save(flags);
132
set_bit(63 - d->irq, &pd->bmp.mask);
133
lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
134
local_irq_restore(flags);
135
}
136
137
/**
138
* ps3_chip_eoi - HV end-of-interrupt.
139
* @virq: The assigned Linux virq.
140
*
141
* Calls lv1_end_of_interrupt_ext().
142
*/
143
144
static void ps3_chip_eoi(struct irq_data *d)
145
{
146
const struct ps3_private *pd = irq_data_get_irq_chip_data(d);
147
lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, d->irq);
148
}
149
150
/**
151
* ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
152
*/
153
154
static struct irq_chip ps3_irq_chip = {
155
.name = "ps3",
156
.irq_mask = ps3_chip_mask,
157
.irq_unmask = ps3_chip_unmask,
158
.irq_eoi = ps3_chip_eoi,
159
};
160
161
/**
162
* ps3_virq_setup - virq related setup.
163
* @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
164
* serviced on.
165
* @outlet: The HV outlet from the various create outlet routines.
166
* @virq: The assigned Linux virq.
167
*
168
* Calls irq_create_mapping() to get a virq and sets the chip data to
169
* ps3_private data.
170
*/
171
172
static int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
173
unsigned int *virq)
174
{
175
int result;
176
struct ps3_private *pd;
177
178
/* This defines the default interrupt distribution policy. */
179
180
if (cpu == PS3_BINDING_CPU_ANY)
181
cpu = 0;
182
183
pd = &per_cpu(ps3_private, cpu);
184
185
*virq = irq_create_mapping(NULL, outlet);
186
187
if (*virq == NO_IRQ) {
188
pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
189
__func__, __LINE__, outlet);
190
result = -ENOMEM;
191
goto fail_create;
192
}
193
194
pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
195
outlet, cpu, *virq);
196
197
result = irq_set_chip_data(*virq, pd);
198
199
if (result) {
200
pr_debug("%s:%d: irq_set_chip_data failed\n",
201
__func__, __LINE__);
202
goto fail_set;
203
}
204
205
ps3_chip_mask(irq_get_irq_data(*virq));
206
207
return result;
208
209
fail_set:
210
irq_dispose_mapping(*virq);
211
fail_create:
212
return result;
213
}
214
215
/**
216
* ps3_virq_destroy - virq related teardown.
217
* @virq: The assigned Linux virq.
218
*
219
* Clears chip data and calls irq_dispose_mapping() for the virq.
220
*/
221
222
static int ps3_virq_destroy(unsigned int virq)
223
{
224
const struct ps3_private *pd = irq_get_chip_data(virq);
225
226
pr_debug("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__,
227
__LINE__, pd->ppe_id, pd->thread_id, virq);
228
229
irq_set_chip_data(virq, NULL);
230
irq_dispose_mapping(virq);
231
232
pr_debug("%s:%d <-\n", __func__, __LINE__);
233
return 0;
234
}
235
236
/**
237
* ps3_irq_plug_setup - Generic outlet and virq related setup.
238
* @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
239
* serviced on.
240
* @outlet: The HV outlet from the various create outlet routines.
241
* @virq: The assigned Linux virq.
242
*
243
* Sets up virq and connects the irq plug.
244
*/
245
246
int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
247
unsigned int *virq)
248
{
249
int result;
250
struct ps3_private *pd;
251
252
result = ps3_virq_setup(cpu, outlet, virq);
253
254
if (result) {
255
pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
256
goto fail_setup;
257
}
258
259
pd = irq_get_chip_data(*virq);
260
261
/* Binds outlet to cpu + virq. */
262
263
result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq,
264
outlet, 0);
265
266
if (result) {
267
pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
268
__func__, __LINE__, ps3_result(result));
269
result = -EPERM;
270
goto fail_connect;
271
}
272
273
return result;
274
275
fail_connect:
276
ps3_virq_destroy(*virq);
277
fail_setup:
278
return result;
279
}
280
EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
281
282
/**
283
* ps3_irq_plug_destroy - Generic outlet and virq related teardown.
284
* @virq: The assigned Linux virq.
285
*
286
* Disconnects the irq plug and tears down virq.
287
* Do not call for system bus event interrupts setup with
288
* ps3_sb_event_receive_port_setup().
289
*/
290
291
int ps3_irq_plug_destroy(unsigned int virq)
292
{
293
int result;
294
const struct ps3_private *pd = irq_get_chip_data(virq);
295
296
pr_debug("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__,
297
__LINE__, pd->ppe_id, pd->thread_id, virq);
298
299
ps3_chip_mask(irq_get_irq_data(virq));
300
301
result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq);
302
303
if (result)
304
pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
305
__func__, __LINE__, ps3_result(result));
306
307
ps3_virq_destroy(virq);
308
309
return result;
310
}
311
EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
312
313
/**
314
* ps3_event_receive_port_setup - Setup an event receive port.
315
* @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
316
* serviced on.
317
* @virq: The assigned Linux virq.
318
*
319
* The virq can be used with lv1_connect_interrupt_event_receive_port() to
320
* arrange to receive interrupts from system-bus devices, or with
321
* ps3_send_event_locally() to signal events.
322
*/
323
324
int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
325
{
326
int result;
327
u64 outlet;
328
329
result = lv1_construct_event_receive_port(&outlet);
330
331
if (result) {
332
pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
333
__func__, __LINE__, ps3_result(result));
334
*virq = NO_IRQ;
335
return result;
336
}
337
338
result = ps3_irq_plug_setup(cpu, outlet, virq);
339
BUG_ON(result);
340
341
return result;
342
}
343
EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
344
345
/**
346
* ps3_event_receive_port_destroy - Destroy an event receive port.
347
* @virq: The assigned Linux virq.
348
*
349
* Since ps3_event_receive_port_destroy destroys the receive port outlet,
350
* SB devices need to call disconnect_interrupt_event_receive_port() before
351
* this.
352
*/
353
354
int ps3_event_receive_port_destroy(unsigned int virq)
355
{
356
int result;
357
358
pr_debug(" -> %s:%d virq %u\n", __func__, __LINE__, virq);
359
360
ps3_chip_mask(irq_get_irq_data(virq));
361
362
result = lv1_destruct_event_receive_port(virq_to_hw(virq));
363
364
if (result)
365
pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
366
__func__, __LINE__, ps3_result(result));
367
368
/*
369
* Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu()
370
* calls from interrupt context (smp_call_function) when kexecing.
371
*/
372
373
pr_debug(" <- %s:%d\n", __func__, __LINE__);
374
return result;
375
}
376
377
int ps3_send_event_locally(unsigned int virq)
378
{
379
return lv1_send_event_locally(virq_to_hw(virq));
380
}
381
382
/**
383
* ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
384
* @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
385
* serviced on.
386
* @dev: The system bus device instance.
387
* @virq: The assigned Linux virq.
388
*
389
* An event irq represents a virtual device interrupt. The interrupt_id
390
* coresponds to the software interrupt number.
391
*/
392
393
int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev,
394
enum ps3_cpu_binding cpu, unsigned int *virq)
395
{
396
/* this should go in system-bus.c */
397
398
int result;
399
400
result = ps3_event_receive_port_setup(cpu, virq);
401
402
if (result)
403
return result;
404
405
result = lv1_connect_interrupt_event_receive_port(dev->bus_id,
406
dev->dev_id, virq_to_hw(*virq), dev->interrupt_id);
407
408
if (result) {
409
pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
410
" failed: %s\n", __func__, __LINE__,
411
ps3_result(result));
412
ps3_event_receive_port_destroy(*virq);
413
*virq = NO_IRQ;
414
return result;
415
}
416
417
pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
418
dev->interrupt_id, *virq);
419
420
return 0;
421
}
422
EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
423
424
int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev,
425
unsigned int virq)
426
{
427
/* this should go in system-bus.c */
428
429
int result;
430
431
pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
432
dev->interrupt_id, virq);
433
434
result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id,
435
dev->dev_id, virq_to_hw(virq), dev->interrupt_id);
436
437
if (result)
438
pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
439
" failed: %s\n", __func__, __LINE__,
440
ps3_result(result));
441
442
result = ps3_event_receive_port_destroy(virq);
443
BUG_ON(result);
444
445
/*
446
* ps3_event_receive_port_destroy() destroys the IRQ plug,
447
* so don't call ps3_irq_plug_destroy() here.
448
*/
449
450
result = ps3_virq_destroy(virq);
451
BUG_ON(result);
452
453
pr_debug(" <- %s:%d\n", __func__, __LINE__);
454
return result;
455
}
456
EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
457
458
/**
459
* ps3_io_irq_setup - Setup a system bus io irq.
460
* @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
461
* serviced on.
462
* @interrupt_id: The device interrupt id read from the system repository.
463
* @virq: The assigned Linux virq.
464
*
465
* An io irq represents a non-virtualized device interrupt. interrupt_id
466
* coresponds to the interrupt number of the interrupt controller.
467
*/
468
469
int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
470
unsigned int *virq)
471
{
472
int result;
473
u64 outlet;
474
475
result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
476
477
if (result) {
478
pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
479
__func__, __LINE__, ps3_result(result));
480
return result;
481
}
482
483
result = ps3_irq_plug_setup(cpu, outlet, virq);
484
BUG_ON(result);
485
486
return result;
487
}
488
EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
489
490
int ps3_io_irq_destroy(unsigned int virq)
491
{
492
int result;
493
unsigned long outlet = virq_to_hw(virq);
494
495
ps3_chip_mask(irq_get_irq_data(virq));
496
497
/*
498
* lv1_destruct_io_irq_outlet() will destroy the IRQ plug,
499
* so call ps3_irq_plug_destroy() first.
500
*/
501
502
result = ps3_irq_plug_destroy(virq);
503
BUG_ON(result);
504
505
result = lv1_destruct_io_irq_outlet(outlet);
506
507
if (result)
508
pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
509
__func__, __LINE__, ps3_result(result));
510
511
return result;
512
}
513
EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
514
515
/**
516
* ps3_vuart_irq_setup - Setup the system virtual uart virq.
517
* @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
518
* serviced on.
519
* @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
520
* @virq: The assigned Linux virq.
521
*
522
* The system supports only a single virtual uart, so multiple calls without
523
* freeing the interrupt will return a wrong state error.
524
*/
525
526
int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
527
unsigned int *virq)
528
{
529
int result;
530
u64 outlet;
531
u64 lpar_addr;
532
533
BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
534
535
lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
536
537
result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
538
539
if (result) {
540
pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
541
__func__, __LINE__, ps3_result(result));
542
return result;
543
}
544
545
result = ps3_irq_plug_setup(cpu, outlet, virq);
546
BUG_ON(result);
547
548
return result;
549
}
550
EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup);
551
552
int ps3_vuart_irq_destroy(unsigned int virq)
553
{
554
int result;
555
556
ps3_chip_mask(irq_get_irq_data(virq));
557
result = lv1_deconfigure_virtual_uart_irq();
558
559
if (result) {
560
pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
561
__func__, __LINE__, ps3_result(result));
562
return result;
563
}
564
565
result = ps3_irq_plug_destroy(virq);
566
BUG_ON(result);
567
568
return result;
569
}
570
EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy);
571
572
/**
573
* ps3_spe_irq_setup - Setup an spe virq.
574
* @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
575
* serviced on.
576
* @spe_id: The spe_id returned from lv1_construct_logical_spe().
577
* @class: The spe interrupt class {0,1,2}.
578
* @virq: The assigned Linux virq.
579
*
580
*/
581
582
int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
583
unsigned int class, unsigned int *virq)
584
{
585
int result;
586
u64 outlet;
587
588
BUG_ON(class > 2);
589
590
result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
591
592
if (result) {
593
pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
594
__func__, __LINE__, ps3_result(result));
595
return result;
596
}
597
598
result = ps3_irq_plug_setup(cpu, outlet, virq);
599
BUG_ON(result);
600
601
return result;
602
}
603
604
int ps3_spe_irq_destroy(unsigned int virq)
605
{
606
int result;
607
608
ps3_chip_mask(irq_get_irq_data(virq));
609
610
result = ps3_irq_plug_destroy(virq);
611
BUG_ON(result);
612
613
return result;
614
}
615
616
617
#define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
618
#define PS3_PLUG_MAX 63
619
620
#if defined(DEBUG)
621
static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
622
const char* func, int line)
623
{
624
pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
625
func, line, header, cpu,
626
*p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
627
*p & 0xffff);
628
}
629
630
static void __maybe_unused _dump_256_bmp(const char *header,
631
const u64 *p, unsigned cpu, const char* func, int line)
632
{
633
pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
634
func, line, header, cpu, p[0], p[1], p[2], p[3]);
635
}
636
637
#define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
638
static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
639
{
640
unsigned long flags;
641
642
spin_lock_irqsave(&pd->bmp.lock, flags);
643
_dump_64_bmp("stat", &pd->bmp.status, pd->thread_id, func, line);
644
_dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
645
spin_unlock_irqrestore(&pd->bmp.lock, flags);
646
}
647
648
#define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
649
static void __maybe_unused _dump_mask(struct ps3_private *pd,
650
const char* func, int line)
651
{
652
unsigned long flags;
653
654
spin_lock_irqsave(&pd->bmp.lock, flags);
655
_dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
656
spin_unlock_irqrestore(&pd->bmp.lock, flags);
657
}
658
#else
659
static void dump_bmp(struct ps3_private* pd) {};
660
#endif /* defined(DEBUG) */
661
662
static int ps3_host_map(struct irq_host *h, unsigned int virq,
663
irq_hw_number_t hwirq)
664
{
665
pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
666
virq);
667
668
irq_set_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
669
670
return 0;
671
}
672
673
static int ps3_host_match(struct irq_host *h, struct device_node *np)
674
{
675
/* Match all */
676
return 1;
677
}
678
679
static struct irq_host_ops ps3_host_ops = {
680
.map = ps3_host_map,
681
.match = ps3_host_match,
682
};
683
684
void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
685
{
686
struct ps3_private *pd = &per_cpu(ps3_private, cpu);
687
688
pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
689
690
pr_debug("%s:%d: cpu %u, virq %u, mask %llxh\n", __func__, __LINE__,
691
cpu, virq, pd->bmp.ipi_debug_brk_mask);
692
}
693
694
static unsigned int ps3_get_irq(void)
695
{
696
struct ps3_private *pd = &__get_cpu_var(ps3_private);
697
u64 x = (pd->bmp.status & pd->bmp.mask);
698
unsigned int plug;
699
700
/* check for ipi break first to stop this cpu ASAP */
701
702
if (x & pd->bmp.ipi_debug_brk_mask)
703
x &= pd->bmp.ipi_debug_brk_mask;
704
705
asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
706
plug &= 0x3f;
707
708
if (unlikely(plug == NO_IRQ)) {
709
pr_debug("%s:%d: no plug found: thread_id %llu\n", __func__,
710
__LINE__, pd->thread_id);
711
dump_bmp(&per_cpu(ps3_private, 0));
712
dump_bmp(&per_cpu(ps3_private, 1));
713
return NO_IRQ;
714
}
715
716
#if defined(DEBUG)
717
if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
718
dump_bmp(&per_cpu(ps3_private, 0));
719
dump_bmp(&per_cpu(ps3_private, 1));
720
BUG();
721
}
722
#endif
723
return plug;
724
}
725
726
void __init ps3_init_IRQ(void)
727
{
728
int result;
729
unsigned cpu;
730
struct irq_host *host;
731
732
host = irq_alloc_host(NULL, IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
733
PS3_INVALID_OUTLET);
734
irq_set_default_host(host);
735
irq_set_virq_count(PS3_PLUG_MAX + 1);
736
737
for_each_possible_cpu(cpu) {
738
struct ps3_private *pd = &per_cpu(ps3_private, cpu);
739
740
lv1_get_logical_ppe_id(&pd->ppe_id);
741
pd->thread_id = get_hard_smp_processor_id(cpu);
742
spin_lock_init(&pd->bmp.lock);
743
744
pr_debug("%s:%d: ppe_id %llu, thread_id %llu, bmp %lxh\n",
745
__func__, __LINE__, pd->ppe_id, pd->thread_id,
746
ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
747
748
result = lv1_configure_irq_state_bitmap(pd->ppe_id,
749
pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
750
751
if (result)
752
pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
753
" %s\n", __func__, __LINE__,
754
ps3_result(result));
755
}
756
757
ppc_md.get_irq = ps3_get_irq;
758
}
759
760
void ps3_shutdown_IRQ(int cpu)
761
{
762
int result;
763
u64 ppe_id;
764
u64 thread_id = get_hard_smp_processor_id(cpu);
765
766
lv1_get_logical_ppe_id(&ppe_id);
767
result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
768
769
DBG("%s:%d: lv1_configure_irq_state_bitmap (%llu:%llu/%d) %s\n", __func__,
770
__LINE__, ppe_id, thread_id, cpu, ps3_result(result));
771
}
772
773