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Linux/arch/powerpc/platforms/ps3/interrupt.c

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  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/export.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 #define FAIL udbg_printf
 35 #else
 36 #define DBG pr_devel
 37 #define FAIL pr_debug
 38 #endif
 39 
 40 /**
 41  * struct ps3_bmp - a per cpu irq status and mask bitmap structure
 42  * @status: 256 bit status bitmap indexed by plug
 43  * @unused_1: Alignment
 44  * @mask: 256 bit mask bitmap indexed by plug
 45  * @unused_2: Alignment
 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 };
 77 
 78 /**
 79  * struct ps3_private - a per cpu data structure
 80  * @bmp: ps3_bmp structure
 81  * @bmp_lock: Syncronize access to bmp.
 82  * @ipi_debug_brk_mask: Mask for debug break IPIs
 83  * @ppe_id: HV logical_ppe_id
 84  * @thread_id: HV thread_id
 85  * @ipi_mask: Mask of IPI virqs
 86  */
 87 
 88 struct ps3_private {
 89         struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN)));
 90         spinlock_t bmp_lock;
 91         u64 ppe_id;
 92         u64 thread_id;
 93         unsigned long ipi_debug_brk_mask;
 94         unsigned long ipi_mask;
 95 };
 96 
 97 static DEFINE_PER_CPU(struct ps3_private, ps3_private);
 98 
 99 /**
100  * ps3_chip_mask - Set an interrupt mask bit in ps3_bmp.
101  * @virq: The assigned Linux virq.
102  *
103  * Sets ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
104  */
105 
106 static void ps3_chip_mask(struct irq_data *d)
107 {
108         struct ps3_private *pd = irq_data_get_irq_chip_data(d);
109         unsigned long flags;
110 
111         DBG("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__,
112                 pd->thread_id, d->irq);
113 
114         local_irq_save(flags);
115         clear_bit(63 - d->irq, &pd->bmp.mask);
116         lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
117         local_irq_restore(flags);
118 }
119 
120 /**
121  * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
122  * @virq: The assigned Linux virq.
123  *
124  * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
125  */
126 
127 static void ps3_chip_unmask(struct irq_data *d)
128 {
129         struct ps3_private *pd = irq_data_get_irq_chip_data(d);
130         unsigned long flags;
131 
132         DBG("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__,
133                 pd->thread_id, d->irq);
134 
135         local_irq_save(flags);
136         set_bit(63 - d->irq, &pd->bmp.mask);
137         lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
138         local_irq_restore(flags);
139 }
140 
141 /**
142  * ps3_chip_eoi - HV end-of-interrupt.
143  * @virq: The assigned Linux virq.
144  *
145  * Calls lv1_end_of_interrupt_ext().
146  */
147 
148 static void ps3_chip_eoi(struct irq_data *d)
149 {
150         const struct ps3_private *pd = irq_data_get_irq_chip_data(d);
151 
152         /* non-IPIs are EOIed here. */
153 
154         if (!test_bit(63 - d->irq, &pd->ipi_mask))
155                 lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, d->irq);
156 }
157 
158 /**
159  * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
160  */
161 
162 static struct irq_chip ps3_irq_chip = {
163         .name = "ps3",
164         .irq_mask = ps3_chip_mask,
165         .irq_unmask = ps3_chip_unmask,
166         .irq_eoi = ps3_chip_eoi,
167 };
168 
169 /**
170  * ps3_virq_setup - virq related setup.
171  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
172  * serviced on.
173  * @outlet: The HV outlet from the various create outlet routines.
174  * @virq: The assigned Linux virq.
175  *
176  * Calls irq_create_mapping() to get a virq and sets the chip data to
177  * ps3_private data.
178  */
179 
180 static int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
181                           unsigned int *virq)
182 {
183         int result;
184         struct ps3_private *pd;
185 
186         /* This defines the default interrupt distribution policy. */
187 
188         if (cpu == PS3_BINDING_CPU_ANY)
189                 cpu = 0;
190 
191         pd = &per_cpu(ps3_private, cpu);
192 
193         *virq = irq_create_mapping(NULL, outlet);
194 
195         if (*virq == NO_IRQ) {
196                 FAIL("%s:%d: irq_create_mapping failed: outlet %lu\n",
197                         __func__, __LINE__, outlet);
198                 result = -ENOMEM;
199                 goto fail_create;
200         }
201 
202         DBG("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
203                 outlet, cpu, *virq);
204 
205         result = irq_set_chip_data(*virq, pd);
206 
207         if (result) {
208                 FAIL("%s:%d: irq_set_chip_data failed\n",
209                         __func__, __LINE__);
210                 goto fail_set;
211         }
212 
213         ps3_chip_mask(irq_get_irq_data(*virq));
214 
215         return result;
216 
217 fail_set:
218         irq_dispose_mapping(*virq);
219 fail_create:
220         return result;
221 }
222 
223 /**
224  * ps3_virq_destroy - virq related teardown.
225  * @virq: The assigned Linux virq.
226  *
227  * Clears chip data and calls irq_dispose_mapping() for the virq.
228  */
229 
230 static int ps3_virq_destroy(unsigned int virq)
231 {
232         const struct ps3_private *pd = irq_get_chip_data(virq);
233 
234         DBG("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__,
235                 __LINE__, pd->ppe_id, pd->thread_id, virq);
236 
237         irq_set_chip_data(virq, NULL);
238         irq_dispose_mapping(virq);
239 
240         DBG("%s:%d <-\n", __func__, __LINE__);
241         return 0;
242 }
243 
244 /**
245  * ps3_irq_plug_setup - Generic outlet and virq related setup.
246  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
247  * serviced on.
248  * @outlet: The HV outlet from the various create outlet routines.
249  * @virq: The assigned Linux virq.
250  *
251  * Sets up virq and connects the irq plug.
252  */
253 
254 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
255         unsigned int *virq)
256 {
257         int result;
258         struct ps3_private *pd;
259 
260         result = ps3_virq_setup(cpu, outlet, virq);
261 
262         if (result) {
263                 FAIL("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
264                 goto fail_setup;
265         }
266 
267         pd = irq_get_chip_data(*virq);
268 
269         /* Binds outlet to cpu + virq. */
270 
271         result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq,
272                 outlet, 0);
273 
274         if (result) {
275                 FAIL("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
276                 __func__, __LINE__, ps3_result(result));
277                 result = -EPERM;
278                 goto fail_connect;
279         }
280 
281         return result;
282 
283 fail_connect:
284         ps3_virq_destroy(*virq);
285 fail_setup:
286         return result;
287 }
288 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
289 
290 /**
291  * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
292  * @virq: The assigned Linux virq.
293  *
294  * Disconnects the irq plug and tears down virq.
295  * Do not call for system bus event interrupts setup with
296  * ps3_sb_event_receive_port_setup().
297  */
298 
299 int ps3_irq_plug_destroy(unsigned int virq)
300 {
301         int result;
302         const struct ps3_private *pd = irq_get_chip_data(virq);
303 
304         DBG("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__,
305                 __LINE__, pd->ppe_id, pd->thread_id, virq);
306 
307         ps3_chip_mask(irq_get_irq_data(virq));
308 
309         result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq);
310 
311         if (result)
312                 FAIL("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
313                 __func__, __LINE__, ps3_result(result));
314 
315         ps3_virq_destroy(virq);
316 
317         return result;
318 }
319 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
320 
321 /**
322  * ps3_event_receive_port_setup - Setup an event receive port.
323  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
324  * serviced on.
325  * @virq: The assigned Linux virq.
326  *
327  * The virq can be used with lv1_connect_interrupt_event_receive_port() to
328  * arrange to receive interrupts from system-bus devices, or with
329  * ps3_send_event_locally() to signal events.
330  */
331 
332 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
333 {
334         int result;
335         u64 outlet;
336 
337         result = lv1_construct_event_receive_port(&outlet);
338 
339         if (result) {
340                 FAIL("%s:%d: lv1_construct_event_receive_port failed: %s\n",
341                         __func__, __LINE__, ps3_result(result));
342                 *virq = NO_IRQ;
343                 return result;
344         }
345 
346         result = ps3_irq_plug_setup(cpu, outlet, virq);
347         BUG_ON(result);
348 
349         return result;
350 }
351 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
352 
353 /**
354  * ps3_event_receive_port_destroy - Destroy an event receive port.
355  * @virq: The assigned Linux virq.
356  *
357  * Since ps3_event_receive_port_destroy destroys the receive port outlet,
358  * SB devices need to call disconnect_interrupt_event_receive_port() before
359  * this.
360  */
361 
362 int ps3_event_receive_port_destroy(unsigned int virq)
363 {
364         int result;
365 
366         DBG(" -> %s:%d virq %u\n", __func__, __LINE__, virq);
367 
368         ps3_chip_mask(irq_get_irq_data(virq));
369 
370         result = lv1_destruct_event_receive_port(virq_to_hw(virq));
371 
372         if (result)
373                 FAIL("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
374                         __func__, __LINE__, ps3_result(result));
375 
376         /*
377          * Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu()
378          * calls from interrupt context (smp_call_function) when kexecing.
379          */
380 
381         DBG(" <- %s:%d\n", __func__, __LINE__);
382         return result;
383 }
384 
385 int ps3_send_event_locally(unsigned int virq)
386 {
387         return lv1_send_event_locally(virq_to_hw(virq));
388 }
389 
390 /**
391  * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
392  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
393  * serviced on.
394  * @dev: The system bus device instance.
395  * @virq: The assigned Linux virq.
396  *
397  * An event irq represents a virtual device interrupt.  The interrupt_id
398  * coresponds to the software interrupt number.
399  */
400 
401 int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev,
402         enum ps3_cpu_binding cpu, unsigned int *virq)
403 {
404         /* this should go in system-bus.c */
405 
406         int result;
407 
408         result = ps3_event_receive_port_setup(cpu, virq);
409 
410         if (result)
411                 return result;
412 
413         result = lv1_connect_interrupt_event_receive_port(dev->bus_id,
414                 dev->dev_id, virq_to_hw(*virq), dev->interrupt_id);
415 
416         if (result) {
417                 FAIL("%s:%d: lv1_connect_interrupt_event_receive_port"
418                         " failed: %s\n", __func__, __LINE__,
419                         ps3_result(result));
420                 ps3_event_receive_port_destroy(*virq);
421                 *virq = NO_IRQ;
422                 return result;
423         }
424 
425         DBG("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
426                 dev->interrupt_id, *virq);
427 
428         return 0;
429 }
430 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
431 
432 int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev,
433         unsigned int virq)
434 {
435         /* this should go in system-bus.c */
436 
437         int result;
438 
439         DBG(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
440                 dev->interrupt_id, virq);
441 
442         result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id,
443                 dev->dev_id, virq_to_hw(virq), dev->interrupt_id);
444 
445         if (result)
446                 FAIL("%s:%d: lv1_disconnect_interrupt_event_receive_port"
447                         " failed: %s\n", __func__, __LINE__,
448                         ps3_result(result));
449 
450         result = ps3_event_receive_port_destroy(virq);
451         BUG_ON(result);
452 
453         /*
454          * ps3_event_receive_port_destroy() destroys the IRQ plug,
455          * so don't call ps3_irq_plug_destroy() here.
456          */
457 
458         result = ps3_virq_destroy(virq);
459         BUG_ON(result);
460 
461         DBG(" <- %s:%d\n", __func__, __LINE__);
462         return result;
463 }
464 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
465 
466 /**
467  * ps3_io_irq_setup - Setup a system bus io irq.
468  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
469  * serviced on.
470  * @interrupt_id: The device interrupt id read from the system repository.
471  * @virq: The assigned Linux virq.
472  *
473  * An io irq represents a non-virtualized device interrupt.  interrupt_id
474  * coresponds to the interrupt number of the interrupt controller.
475  */
476 
477 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
478         unsigned int *virq)
479 {
480         int result;
481         u64 outlet;
482 
483         result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
484 
485         if (result) {
486                 FAIL("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
487                         __func__, __LINE__, ps3_result(result));
488                 return result;
489         }
490 
491         result = ps3_irq_plug_setup(cpu, outlet, virq);
492         BUG_ON(result);
493 
494         return result;
495 }
496 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
497 
498 int ps3_io_irq_destroy(unsigned int virq)
499 {
500         int result;
501         unsigned long outlet = virq_to_hw(virq);
502 
503         ps3_chip_mask(irq_get_irq_data(virq));
504 
505         /*
506          * lv1_destruct_io_irq_outlet() will destroy the IRQ plug,
507          * so call ps3_irq_plug_destroy() first.
508          */
509 
510         result = ps3_irq_plug_destroy(virq);
511         BUG_ON(result);
512 
513         result = lv1_destruct_io_irq_outlet(outlet);
514 
515         if (result)
516                 FAIL("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
517                         __func__, __LINE__, ps3_result(result));
518 
519         return result;
520 }
521 EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
522 
523 /**
524  * ps3_vuart_irq_setup - Setup the system virtual uart virq.
525  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
526  * serviced on.
527  * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
528  * @virq: The assigned Linux virq.
529  *
530  * The system supports only a single virtual uart, so multiple calls without
531  * freeing the interrupt will return a wrong state error.
532  */
533 
534 int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
535         unsigned int *virq)
536 {
537         int result;
538         u64 outlet;
539         u64 lpar_addr;
540 
541         BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
542 
543         lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
544 
545         result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
546 
547         if (result) {
548                 FAIL("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
549                         __func__, __LINE__, ps3_result(result));
550                 return result;
551         }
552 
553         result = ps3_irq_plug_setup(cpu, outlet, virq);
554         BUG_ON(result);
555 
556         return result;
557 }
558 EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup);
559 
560 int ps3_vuart_irq_destroy(unsigned int virq)
561 {
562         int result;
563 
564         ps3_chip_mask(irq_get_irq_data(virq));
565         result = lv1_deconfigure_virtual_uart_irq();
566 
567         if (result) {
568                 FAIL("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
569                         __func__, __LINE__, ps3_result(result));
570                 return result;
571         }
572 
573         result = ps3_irq_plug_destroy(virq);
574         BUG_ON(result);
575 
576         return result;
577 }
578 EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy);
579 
580 /**
581  * ps3_spe_irq_setup - Setup an spe virq.
582  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
583  * serviced on.
584  * @spe_id: The spe_id returned from lv1_construct_logical_spe().
585  * @class: The spe interrupt class {0,1,2}.
586  * @virq: The assigned Linux virq.
587  *
588  */
589 
590 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
591         unsigned int class, unsigned int *virq)
592 {
593         int result;
594         u64 outlet;
595 
596         BUG_ON(class > 2);
597 
598         result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
599 
600         if (result) {
601                 FAIL("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
602                         __func__, __LINE__, ps3_result(result));
603                 return result;
604         }
605 
606         result = ps3_irq_plug_setup(cpu, outlet, virq);
607         BUG_ON(result);
608 
609         return result;
610 }
611 
612 int ps3_spe_irq_destroy(unsigned int virq)
613 {
614         int result;
615 
616         ps3_chip_mask(irq_get_irq_data(virq));
617 
618         result = ps3_irq_plug_destroy(virq);
619         BUG_ON(result);
620 
621         return result;
622 }
623 
624 
625 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
626 #define PS3_PLUG_MAX 63
627 
628 #if defined(DEBUG)
629 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
630         const char* func, int line)
631 {
632         pr_debug("%s:%d: %s %u {%04llx_%04llx_%04llx_%04llx}\n",
633                 func, line, header, cpu,
634                 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
635                 *p & 0xffff);
636 }
637 
638 static void __maybe_unused _dump_256_bmp(const char *header,
639         const u64 *p, unsigned cpu, const char* func, int line)
640 {
641         pr_debug("%s:%d: %s %u {%016llx:%016llx:%016llx:%016llx}\n",
642                 func, line, header, cpu, p[0], p[1], p[2], p[3]);
643 }
644 
645 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
646 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
647 {
648         unsigned long flags;
649 
650         spin_lock_irqsave(&pd->bmp_lock, flags);
651         _dump_64_bmp("stat", &pd->bmp.status, pd->thread_id, func, line);
652         _dump_64_bmp("mask", (u64*)&pd->bmp.mask, pd->thread_id, func, line);
653         spin_unlock_irqrestore(&pd->bmp_lock, flags);
654 }
655 
656 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
657 static void __maybe_unused _dump_mask(struct ps3_private *pd,
658         const char* func, int line)
659 {
660         unsigned long flags;
661 
662         spin_lock_irqsave(&pd->bmp_lock, flags);
663         _dump_64_bmp("mask", (u64*)&pd->bmp.mask, pd->thread_id, func, line);
664         spin_unlock_irqrestore(&pd->bmp_lock, flags);
665 }
666 #else
667 static void dump_bmp(struct ps3_private* pd) {};
668 #endif /* defined(DEBUG) */
669 
670 static int ps3_host_map(struct irq_domain *h, unsigned int virq,
671         irq_hw_number_t hwirq)
672 {
673         DBG("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
674                 virq);
675 
676         irq_set_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
677 
678         return 0;
679 }
680 
681 static int ps3_host_match(struct irq_domain *h, struct device_node *np)
682 {
683         /* Match all */
684         return 1;
685 }
686 
687 static const struct irq_domain_ops ps3_host_ops = {
688         .map = ps3_host_map,
689         .match = ps3_host_match,
690 };
691 
692 void __init ps3_register_ipi_debug_brk(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_debug_brk_mask);
697 
698         DBG("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
699                 cpu, virq, pd->ipi_debug_brk_mask);
700 }
701 
702 void __init ps3_register_ipi_irq(unsigned int cpu, unsigned int virq)
703 {
704         struct ps3_private *pd = &per_cpu(ps3_private, cpu);
705 
706         set_bit(63 - virq, &pd->ipi_mask);
707 
708         DBG("%s:%d: cpu %u, virq %u, ipi_mask %lxh\n", __func__, __LINE__,
709                 cpu, virq, pd->ipi_mask);
710 }
711 
712 static unsigned int ps3_get_irq(void)
713 {
714         struct ps3_private *pd = &__get_cpu_var(ps3_private);
715         u64 x = (pd->bmp.status & pd->bmp.mask);
716         unsigned int plug;
717 
718         /* check for ipi break first to stop this cpu ASAP */
719 
720         if (x & pd->ipi_debug_brk_mask)
721                 x &= pd->ipi_debug_brk_mask;
722 
723         asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
724         plug &= 0x3f;
725 
726         if (unlikely(plug == NO_IRQ)) {
727                 DBG("%s:%d: no plug found: thread_id %llu\n", __func__,
728                         __LINE__, pd->thread_id);
729                 dump_bmp(&per_cpu(ps3_private, 0));
730                 dump_bmp(&per_cpu(ps3_private, 1));
731                 return NO_IRQ;
732         }
733 
734 #if defined(DEBUG)
735         if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
736                 dump_bmp(&per_cpu(ps3_private, 0));
737                 dump_bmp(&per_cpu(ps3_private, 1));
738                 BUG();
739         }
740 #endif
741 
742         /* IPIs are EOIed here. */
743 
744         if (test_bit(63 - plug, &pd->ipi_mask))
745                 lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, plug);
746 
747         return plug;
748 }
749 
750 void __init ps3_init_IRQ(void)
751 {
752         int result;
753         unsigned cpu;
754         struct irq_domain *host;
755 
756         host = irq_domain_add_nomap(NULL, PS3_PLUG_MAX + 1, &ps3_host_ops, NULL);
757         irq_set_default_host(host);
758 
759         for_each_possible_cpu(cpu) {
760                 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
761 
762                 lv1_get_logical_ppe_id(&pd->ppe_id);
763                 pd->thread_id = get_hard_smp_processor_id(cpu);
764                 spin_lock_init(&pd->bmp_lock);
765 
766                 DBG("%s:%d: ppe_id %llu, thread_id %llu, bmp %lxh\n",
767                         __func__, __LINE__, pd->ppe_id, pd->thread_id,
768                         ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
769 
770                 result = lv1_configure_irq_state_bitmap(pd->ppe_id,
771                         pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
772 
773                 if (result)
774                         FAIL("%s:%d: lv1_configure_irq_state_bitmap failed:"
775                                 " %s\n", __func__, __LINE__,
776                                 ps3_result(result));
777         }
778 
779         ppc_md.get_irq = ps3_get_irq;
780 }
781 
782 void ps3_shutdown_IRQ(int cpu)
783 {
784         int result;
785         u64 ppe_id;
786         u64 thread_id = get_hard_smp_processor_id(cpu);
787 
788         lv1_get_logical_ppe_id(&ppe_id);
789         result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
790 
791         DBG("%s:%d: lv1_configure_irq_state_bitmap (%llu:%llu/%d) %s\n", __func__,
792                 __LINE__, ppe_id, thread_id, cpu, ps3_result(result));
793 }
794 

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