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
  65 #define PS3_BMP_MINALIGN 64
  66
  67 struct ps3_bmp {
  68         struct {
  69                 u64 status;
  70                 u64 unused_1[3];
  71                 u64 mask;
  72                 u64 unused_2[3];
  73         };
  74         u64 ipi_debug_brk_mask;
  75         spinlock_t lock;
  76 };
  77
  78 /**
  79  * struct ps3_private - a per cpu data structure
  80  * @bmp: ps3_bmp structure
  81  * @ppe_id: HV logical_ppe_id
  82  * @thread_id: HV thread_id
  83  */
  84
  85 struct ps3_private {
  86         struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN)));
  87         u64 ppe_id;
  88         u64 thread_id;
  89 };
  90
  91 static DEFINE_PER_CPU(struct ps3_private, ps3_private);
  92
  93 /**
  94  * ps3_chip_mask - Set an interrupt mask bit in ps3_bmp.
  95  * @virq: The assigned Linux virq.
  96  *
  97  * Sets ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
  98  */
  99
 100 static void ps3_chip_mask(unsigned int virq)
 101 {
 102         struct ps3_private *pd = get_irq_chip_data(virq);
 103         unsigned long flags;
 104
 105         pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
 106                 pd->thread_id, virq);
 107
 108         local_irq_save(flags);
 109         clear_bit(63 - virq, &pd->bmp.mask);
 110         lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
 111         local_irq_restore(flags);
 112 }
 113
 114 /**
 115  * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
 116  * @virq: The assigned Linux virq.
 117  *
 118  * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
 119  */
 120
 121 static void ps3_chip_unmask(unsigned int virq)
 122 {
 123         struct ps3_private *pd = get_irq_chip_data(virq);
 124         unsigned long flags;
 125
 126         pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
 127                 pd->thread_id, virq);
 128
 129         local_irq_save(flags);
 130         set_bit(63 - virq, &pd->bmp.mask);
 131         lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
 132         local_irq_restore(flags);
 133 }
 134
 135 /**
 136  * ps3_chip_eoi - HV end-of-interrupt.
 137  * @virq: The assigned Linux virq.
 138  *
 139  * Calls lv1_end_of_interrupt_ext().
 140  */
 141
 142 static void ps3_chip_eoi(unsigned int virq)
 143 {
 144         const struct ps3_private *pd = get_irq_chip_data(virq);
 145         lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, virq);
 146 }
 147
 148 /**
 149  * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
 150  */
 151
 152 static struct irq_chip ps3_irq_chip = {
 153         .typename = "ps3",
 154         .mask = ps3_chip_mask,
 155         .unmask = ps3_chip_unmask,
 156         .eoi = ps3_chip_eoi,
 157 };
 158
 159 /**
 160  * ps3_virq_setup - virq related setup.
 161  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
 162  * serviced on.
 163  * @outlet: The HV outlet from the various create outlet routines.
 164  * @virq: The assigned Linux virq.
 165  *
 166  * Calls irq_create_mapping() to get a virq and sets the chip data to
 167  * ps3_private data.
 168  */
 169
 170 static int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
 171                           unsigned int *virq)
 172 {
 173         int result;
 174         struct ps3_private *pd;
 175
 176         /* This defines the default interrupt distribution policy. */
 177
 178         if (cpu == PS3_BINDING_CPU_ANY)
 179                 cpu = 0;
 180
 181         pd = &per_cpu(ps3_private, cpu);
 182
 183         *virq = irq_create_mapping(NULL, outlet);
 184
 185         if (*virq == NO_IRQ) {
 186                 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
 187                         __func__, __LINE__, outlet);
 188                 result = -ENOMEM;
 189                 goto fail_create;
 190         }
 191
 192         pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
 193                 outlet, cpu, *virq);
 194
 195         result = set_irq_chip_data(*virq, pd);
 196
 197         if (result) {
 198                 pr_debug("%s:%d: set_irq_chip_data failed\n",
 199                         __func__, __LINE__);
 200                 goto fail_set;
 201         }
 202
 203         ps3_chip_mask(*virq);
 204
 205         return result;
 206
 207 fail_set:
 208         irq_dispose_mapping(*virq);
 209 fail_create:
 210         return result;
 211 }
 212
 213 /**
 214  * ps3_virq_destroy - virq related teardown.
 215  * @virq: The assigned Linux virq.
 216  *
 217  * Clears chip data and calls irq_dispose_mapping() for the virq.
 218  */
 219
 220 static int ps3_virq_destroy(unsigned int virq)
 221 {
 222         const struct ps3_private *pd = get_irq_chip_data(virq);
 223
 224         pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
 225                 __LINE__, pd->ppe_id, pd->thread_id, virq);
 226
 227         set_irq_chip_data(virq, NULL);
 228         irq_dispose_mapping(virq);
 229
 230         pr_debug("%s:%d <-\n", __func__, __LINE__);
 231         return 0;
 232 }
 233
 234 /**
 235  * ps3_irq_plug_setup - Generic outlet and virq related setup.
 236  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
 237  * serviced on.
 238  * @outlet: The HV outlet from the various create outlet routines.
 239  * @virq: The assigned Linux virq.
 240  *
 241  * Sets up virq and connects the irq plug.
 242  */
 243
 244 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
 245         unsigned int *virq)
 246 {
 247         int result;
 248         struct ps3_private *pd;
 249
 250         result = ps3_virq_setup(cpu, outlet, virq);
 251
 252         if (result) {
 253                 pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
 254                 goto fail_setup;
 255         }
 256
 257         pd = get_irq_chip_data(*virq);
 258
 259         /* Binds outlet to cpu + virq. */
 260
 261         result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq,
 262                 outlet, 0);
 263
 264         if (result) {
 265                 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
 266                 __func__, __LINE__, ps3_result(result));
 267                 result = -EPERM;
 268                 goto fail_connect;
 269         }
 270
 271         return result;
 272
 273 fail_connect:
 274         ps3_virq_destroy(*virq);
 275 fail_setup:
 276         return result;
 277 }
 278 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
 279
 280 /**
 281  * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
 282  * @virq: The assigned Linux virq.
 283  *
 284  * Disconnects the irq plug and tears down virq.
 285  * Do not call for system bus event interrupts setup with
 286  * ps3_sb_event_receive_port_setup().
 287  */
 288
 289 int ps3_irq_plug_destroy(unsigned int virq)
 290 {
 291         int result;
 292         const struct ps3_private *pd = get_irq_chip_data(virq);
 293
 294         pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
 295                 __LINE__, pd->ppe_id, pd->thread_id, virq);
 296
 297         ps3_chip_mask(virq);
 298
 299         result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq);
 300
 301         if (result)
 302                 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
 303                 __func__, __LINE__, ps3_result(result));
 304
 305         ps3_virq_destroy(virq);
 306
 307         return result;
 308 }
 309 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
 310
 311 /**
 312  * ps3_event_receive_port_setup - Setup an event receive port.
 313  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
 314  * serviced on.
 315  * @virq: The assigned Linux virq.
 316  *
 317  * The virq can be used with lv1_connect_interrupt_event_receive_port() to
 318  * arrange to receive interrupts from system-bus devices, or with
 319  * ps3_send_event_locally() to signal events.
 320  */
 321
 322 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
 323 {
 324         int result;
 325         u64 outlet;
 326
 327         result = lv1_construct_event_receive_port(&outlet);
 328
 329         if (result) {
 330                 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
 331                         __func__, __LINE__, ps3_result(result));
 332                 *virq = NO_IRQ;
 333                 return result;
 334         }
 335
 336         result = ps3_irq_plug_setup(cpu, outlet, virq);
 337         BUG_ON(result);
 338
 339         return result;
 340 }
 341 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
 342
 343 /**
 344  * ps3_event_receive_port_destroy - Destroy an event receive port.
 345  * @virq: The assigned Linux virq.
 346  *
 347  * Since ps3_event_receive_port_destroy destroys the receive port outlet,
 348  * SB devices need to call disconnect_interrupt_event_receive_port() before
 349  * this.
 350  */
 351
 352 int ps3_event_receive_port_destroy(unsigned int virq)
 353 {
 354         int result;
 355
 356         pr_debug(" -> %s:%d virq %u\n", __func__, __LINE__, virq);
 357
 358         ps3_chip_mask(virq);
 359
 360         result = lv1_destruct_event_receive_port(virq_to_hw(virq));
 361
 362         if (result)
 363                 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
 364                         __func__, __LINE__, ps3_result(result));
 365
 366         /*
 367          * Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu()
 368          * calls from interrupt context (smp_call_function) when kexecing.
 369          */
 370
 371         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 372         return result;
 373 }
 374
 375 int ps3_send_event_locally(unsigned int virq)
 376 {
 377         return lv1_send_event_locally(virq_to_hw(virq));
 378 }
 379
 380 /**
 381  * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
 382  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
 383  * serviced on.
 384  * @dev: The system bus device instance.
 385  * @virq: The assigned Linux virq.
 386  *
 387  * An event irq represents a virtual device interrupt.  The interrupt_id
 388  * coresponds to the software interrupt number.
 389  */
 390
 391 int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev,
 392         enum ps3_cpu_binding cpu, unsigned int *virq)
 393 {
 394         /* this should go in system-bus.c */
 395
 396         int result;
 397
 398         result = ps3_event_receive_port_setup(cpu, virq);
 399
 400         if (result)
 401                 return result;
 402
 403         result = lv1_connect_interrupt_event_receive_port(dev->bus_id,
 404                 dev->dev_id, virq_to_hw(*virq), dev->interrupt_id);
 405
 406         if (result) {
 407                 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
 408                         " failed: %s\n", __func__, __LINE__,
 409                         ps3_result(result));
 410                 ps3_event_receive_port_destroy(*virq);
 411                 *virq = NO_IRQ;
 412                 return result;
 413         }
 414
 415         pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
 416                 dev->interrupt_id, *virq);
 417
 418         return 0;
 419 }
 420 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
 421
 422 int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev,
 423         unsigned int virq)
 424 {
 425         /* this should go in system-bus.c */
 426
 427         int result;
 428
 429         pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
 430                 dev->interrupt_id, virq);
 431
 432         result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id,
 433                 dev->dev_id, virq_to_hw(virq), dev->interrupt_id);
 434
 435         if (result)
 436                 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
 437                         " failed: %s\n", __func__, __LINE__,
 438                         ps3_result(result));
 439
 440         result = ps3_event_receive_port_destroy(virq);
 441         BUG_ON(result);
 442
 443         /*
 444          * ps3_event_receive_port_destroy() destroys the IRQ plug,
 445          * so don't call ps3_irq_plug_destroy() here.
 446          */
 447
 448         result = ps3_virq_destroy(virq);
 449         BUG_ON(result);
 450
 451         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 452         return result;
 453 }
 454 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
 455
 456 /**
 457  * ps3_io_irq_setup - Setup a system bus io irq.
 458  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
 459  * serviced on.
 460  * @interrupt_id: The device interrupt id read from the system repository.
 461  * @virq: The assigned Linux virq.
 462  *
 463  * An io irq represents a non-virtualized device interrupt.  interrupt_id
 464  * coresponds to the interrupt number of the interrupt controller.
 465  */
 466
 467 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
 468         unsigned int *virq)
 469 {
 470         int result;
 471         u64 outlet;
 472
 473         result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
 474
 475         if (result) {
 476                 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
 477                         __func__, __LINE__, ps3_result(result));
 478                 return result;
 479         }
 480
 481         result = ps3_irq_plug_setup(cpu, outlet, virq);
 482         BUG_ON(result);
 483
 484         return result;
 485 }
 486 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
 487
 488 int ps3_io_irq_destroy(unsigned int virq)
 489 {
 490         int result;
 491         unsigned long outlet = virq_to_hw(virq);
 492
 493         ps3_chip_mask(virq);
 494
 495         /*
 496          * lv1_destruct_io_irq_outlet() will destroy the IRQ plug,
 497          * so call ps3_irq_plug_destroy() first.
 498          */
 499
 500         result = ps3_irq_plug_destroy(virq);
 501         BUG_ON(result);
 502
 503         result = lv1_destruct_io_irq_outlet(outlet);
 504
 505         if (result)
 506                 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
 507                         __func__, __LINE__, ps3_result(result));
 508
 509         return result;
 510 }
 511 EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
 512
 513 /**
 514  * ps3_vuart_irq_setup - Setup the system virtual uart virq.
 515  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
 516  * serviced on.
 517  * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
 518  * @virq: The assigned Linux virq.
 519  *
 520  * The system supports only a single virtual uart, so multiple calls without
 521  * freeing the interrupt will return a wrong state error.
 522  */
 523
 524 int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
 525         unsigned int *virq)
 526 {
 527         int result;
 528         u64 outlet;
 529         u64 lpar_addr;
 530
 531         BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
 532
 533         lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
 534
 535         result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
 536
 537         if (result) {
 538                 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
 539                         __func__, __LINE__, ps3_result(result));
 540                 return result;
 541         }
 542
 543         result = ps3_irq_plug_setup(cpu, outlet, virq);
 544         BUG_ON(result);
 545
 546         return result;
 547 }
 548 EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup);
 549
 550 int ps3_vuart_irq_destroy(unsigned int virq)
 551 {
 552         int result;
 553
 554         ps3_chip_mask(virq);
 555         result = lv1_deconfigure_virtual_uart_irq();
 556
 557         if (result) {
 558                 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
 559                         __func__, __LINE__, ps3_result(result));
 560                 return result;
 561         }
 562
 563         result = ps3_irq_plug_destroy(virq);
 564         BUG_ON(result);
 565
 566         return result;
 567 }
 568 EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy);
 569
 570 /**
 571  * ps3_spe_irq_setup - Setup an spe virq.
 572  * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
 573  * serviced on.
 574  * @spe_id: The spe_id returned from lv1_construct_logical_spe().
 575  * @class: The spe interrupt class {0,1,2}.
 576  * @virq: The assigned Linux virq.
 577  *
 578  */
 579
 580 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
 581         unsigned int class, unsigned int *virq)
 582 {
 583         int result;
 584         u64 outlet;
 585
 586         BUG_ON(class > 2);
 587
 588         result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
 589
 590         if (result) {
 591                 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
 592                         __func__, __LINE__, ps3_result(result));
 593                 return result;
 594         }
 595
 596         result = ps3_irq_plug_setup(cpu, outlet, virq);
 597         BUG_ON(result);
 598
 599         return result;
 600 }
 601
 602 int ps3_spe_irq_destroy(unsigned int virq)
 603 {
 604         int result;
 605
 606         ps3_chip_mask(virq);
 607
 608         result = ps3_irq_plug_destroy(virq);
 609         BUG_ON(result);
 610
 611         return result;
 612 }
 613
 614
 615 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
 616 #define PS3_PLUG_MAX 63
 617
 618 #if defined(DEBUG)
 619 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
 620         const char* func, int line)
 621 {
 622         pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
 623                 func, line, header, cpu,
 624                 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
 625                 *p & 0xffff);
 626 }
 627
 628 static void __maybe_unused _dump_256_bmp(const char *header,
 629         const u64 *p, unsigned cpu, const char* func, int line)
 630 {
 631         pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
 632                 func, line, header, cpu, p[0], p[1], p[2], p[3]);
 633 }
 634
 635 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
 636 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
 637 {
 638         unsigned long flags;
 639
 640         spin_lock_irqsave(&pd->bmp.lock, flags);
 641         _dump_64_bmp("stat", &pd->bmp.status, pd->thread_id, func, line);
 642         _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
 643         spin_unlock_irqrestore(&pd->bmp.lock, flags);
 644 }
 645
 646 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
 647 static void __maybe_unused _dump_mask(struct ps3_private *pd,
 648         const char* func, int line)
 649 {
 650         unsigned long flags;
 651
 652         spin_lock_irqsave(&pd->bmp.lock, flags);
 653         _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
 654         spin_unlock_irqrestore(&pd->bmp.lock, flags);
 655 }
 656 #else
 657 static void dump_bmp(struct ps3_private* pd) {};
 658 #endif /* defined(DEBUG) */
 659
 660 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
 661 {
 662         set_irq_chip_data(virq, NULL);
 663 }
 664
 665 static int ps3_host_map(struct irq_host *h, unsigned int virq,
 666         irq_hw_number_t hwirq)
 667 {
 668         pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
 669                 virq);
 670
 671         set_irq_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
 672
 673         return 0;
 674 }
 675
 676 static int ps3_host_match(struct irq_host *h, struct device_node *np)
 677 {
 678         /* Match all */
 679         return 1;
 680 }
 681
 682 static struct irq_host_ops ps3_host_ops = {
 683         .map = ps3_host_map,
 684         .unmap = ps3_host_unmap,
 685         .match = ps3_host_match,
 686 };
 687
 688 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
 689 {
 690         struct ps3_private *pd = &per_cpu(ps3_private, cpu);
 691
 692         pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
 693
 694         pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
 695                 cpu, virq, pd->bmp.ipi_debug_brk_mask);
 696 }
 697
 698 static unsigned int ps3_get_irq(void)
 699 {
 700         struct ps3_private *pd = &__get_cpu_var(ps3_private);
 701         u64 x = (pd->bmp.status & pd->bmp.mask);
 702         unsigned int plug;
 703
 704         /* check for ipi break first to stop this cpu ASAP */
 705
 706         if (x & pd->bmp.ipi_debug_brk_mask)
 707                 x &= pd->bmp.ipi_debug_brk_mask;
 708
 709         asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
 710         plug &= 0x3f;
 711
 712         if (unlikely(plug == NO_IRQ)) {
 713                 pr_debug("%s:%d: no plug found: thread_id %lu\n", __func__,
 714                         __LINE__, pd->thread_id);
 715                 dump_bmp(&per_cpu(ps3_private, 0));
 716                 dump_bmp(&per_cpu(ps3_private, 1));
 717                 return NO_IRQ;
 718         }
 719
 720 #if defined(DEBUG)
 721         if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
 722                 dump_bmp(&per_cpu(ps3_private, 0));
 723                 dump_bmp(&per_cpu(ps3_private, 1));
 724                 BUG();
 725         }
 726 #endif
 727         return plug;
 728 }
 729
 730 void __init ps3_init_IRQ(void)
 731 {
 732         int result;
 733         unsigned cpu;
 734         struct irq_host *host;
 735
 736         host = irq_alloc_host(NULL, IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
 737                 PS3_INVALID_OUTLET);
 738         irq_set_default_host(host);
 739         irq_set_virq_count(PS3_PLUG_MAX + 1);
 740
 741         for_each_possible_cpu(cpu) {
 742                 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
 743
 744                 lv1_get_logical_ppe_id(&pd->ppe_id);
 745                 pd->thread_id = get_hard_smp_processor_id(cpu);
 746                 spin_lock_init(&pd->bmp.lock);
 747
 748                 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, bmp %lxh\n",
 749                         __func__, __LINE__, pd->ppe_id, pd->thread_id,
 750                         ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
 751
 752                 result = lv1_configure_irq_state_bitmap(pd->ppe_id,
 753                         pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
 754
 755                 if (result)
 756                         pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
 757                                 " %s\n", __func__, __LINE__,
 758                                 ps3_result(result));
 759         }
 760
 761         ppc_md.get_irq = ps3_get_irq;
 762 }
 763
 764 void ps3_shutdown_IRQ(int cpu)
 765 {
 766         int result;
 767         u64 ppe_id;
 768         u64 thread_id = get_hard_smp_processor_id(cpu);
 769
 770         lv1_get_logical_ppe_id(&ppe_id);
 771         result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
 772
 773         DBG("%s:%d: lv1_configure_irq_state_bitmap (%lu:%lu/%d) %s\n", __func__,
 774                 __LINE__, ppe_id, thread_id, cpu, ps3_result(result));
 775 }