arch/powerpc/platforms/ps3/interrupt.c

   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 mantains 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(unsigned int virq)
 103 {
 104         struct ps3_private *pd = get_irq_chip_data(virq);
 105         unsigned long flags;
 106
 107         pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
 108                 pd->thread_id, virq);
 109
 110         local_irq_save(flags);
 111         clear_bit(63 - virq, &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(unsigned int virq)
 124 {
 125         struct ps3_private *pd = get_irq_chip_data(virq);
 126         unsigned long flags;
 127
 128         pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
 129                 pd->thread_id, virq);
 130
 131         local_irq_save(flags);
 132         set_bit(63 - virq, &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(unsigned int virq)
 145 {
 146         const struct ps3_private *pd = get_irq_chip_data(virq);
 147         lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, virq);
 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         .typename = "ps3",
 156         .mask = ps3_chip_mask,
 157         .unmask = ps3_chip_unmask,
 158         .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 = set_irq_chip_data(*virq, pd);
 198
 199         if (result) {
 200                 pr_debug("%s:%d: set_irq_chip_data failed\n",
 201                         __func__, __LINE__);
 202                 goto fail_set;
 203         }
 204
 205         ps3_chip_mask(*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 = get_irq_chip_data(virq);
 225
 226         pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
 227                 __LINE__, pd->ppe_id, pd->thread_id, virq);
 228
 229         set_irq_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 = get_irq_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 = get_irq_chip_data(virq);
 295
 296         pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
 297                 __LINE__, pd->ppe_id, pd->thread_id, virq);
 298
 299         ps3_chip_mask(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(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(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(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(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 void ps3_host_unmap(struct irq_host *h, unsigned int virq)
 663 {
 664         set_irq_chip_data(virq, NULL);
 665 }
 666
 667 static int ps3_host_map(struct irq_host *h, unsigned int virq,
 668         irq_hw_number_t hwirq)
 669 {
 670         pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
 671                 virq);
 672
 673         set_irq_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
 674
 675         return 0;
 676 }
 677
 678 static int ps3_host_match(struct irq_host *h, struct device_node *np)
 679 {
 680         /* Match all */
 681         return 1;
 682 }
 683
 684 static struct irq_host_ops ps3_host_ops = {
 685         .map = ps3_host_map,
 686         .unmap = ps3_host_unmap,
 687         .match = ps3_host_match,
 688 };
 689
 690 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
 691 {
 692         struct ps3_private *pd = &per_cpu(ps3_private, cpu);
 693
 694         pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
 695
 696         pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
 697                 cpu, virq, pd->bmp.ipi_debug_brk_mask);
 698 }
 699
 700 static unsigned int ps3_get_irq(void)
 701 {
 702         struct ps3_private *pd = &__get_cpu_var(ps3_private);
 703         u64 x = (pd->bmp.status & pd->bmp.mask);
 704         unsigned int plug;
 705
 706         /* check for ipi break first to stop this cpu ASAP */
 707
 708         if (x & pd->bmp.ipi_debug_brk_mask)
 709                 x &= pd->bmp.ipi_debug_brk_mask;
 710
 711         asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
 712         plug &= 0x3f;
 713
 714         if (unlikely(plug == NO_IRQ)) {
 715                 pr_debug("%s:%d: no plug found: thread_id %lu\n", __func__,
 716                         __LINE__, pd->thread_id);
 717                 dump_bmp(&per_cpu(ps3_private, 0));
 718                 dump_bmp(&per_cpu(ps3_private, 1));
 719                 return NO_IRQ;
 720         }
 721
 722 #if defined(DEBUG)
 723         if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
 724                 dump_bmp(&per_cpu(ps3_private, 0));
 725                 dump_bmp(&per_cpu(ps3_private, 1));
 726                 BUG();
 727         }
 728 #endif
 729         return plug;
 730 }
 731
 732 void __init ps3_init_IRQ(void)
 733 {
 734         int result;
 735         unsigned cpu;
 736         struct irq_host *host;
 737
 738         host = irq_alloc_host(NULL, IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
 739                 PS3_INVALID_OUTLET);
 740         irq_set_default_host(host);
 741         irq_set_virq_count(PS3_PLUG_MAX + 1);
 742
 743         for_each_possible_cpu(cpu) {
 744                 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
 745
 746                 lv1_get_logical_ppe_id(&pd->ppe_id);
 747                 pd->thread_id = get_hard_smp_processor_id(cpu);
 748                 spin_lock_init(&pd->bmp.lock);
 749
 750                 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, bmp %lxh\n",
 751                         __func__, __LINE__, pd->ppe_id, pd->thread_id,
 752                         ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
 753
 754                 result = lv1_configure_irq_state_bitmap(pd->ppe_id,
 755                         pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
 756
 757                 if (result)
 758                         pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
 759                                 " %s\n", __func__, __LINE__,
 760                                 ps3_result(result));
 761         }
 762
 763         ppc_md.get_irq = ps3_get_irq;
 764 }
 765
 766 void ps3_shutdown_IRQ(int cpu)
 767 {
 768         int result;
 769         u64 ppe_id;
 770         u64 thread_id = get_hard_smp_processor_id(cpu);
 771
 772         lv1_get_logical_ppe_id(&ppe_id);
 773         result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
 774
 775         DBG("%s:%d: lv1_configure_irq_state_bitmap (%lu:%lu/%d) %s\n", __func__,
 776                 __LINE__, ppe_id, thread_id, cpu, ps3_result(result));
 777 }