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/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 }