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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Low-level SPU handling * * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 * * Author: Arnd Bergmann <arndb@de.ibm.com> */ #undef DEBUG #include <linux/interrupt.h> #include <linux/list.h> #include <linux/init.h> #include <linux/ptrace.h> #include <linux/slab.h> #include <linux/wait.h> #include <linux/mm.h> #include <linux/io.h> #include <linux/mutex.h> #include <linux/linux_logo.h> #include <linux/syscore_ops.h> #include <asm/spu.h> #include <asm/spu_priv1.h> #include <asm/spu_csa.h> #include <asm/xmon.h> #include <asm/prom.h> #include <asm/kexec.h> const struct spu_management_ops *spu_management_ops; EXPORT_SYMBOL_GPL(spu_management_ops); const struct spu_priv1_ops *spu_priv1_ops; EXPORT_SYMBOL_GPL(spu_priv1_ops); struct cbe_spu_info cbe_spu_info[MAX_NUMNODES]; EXPORT_SYMBOL_GPL(cbe_spu_info); /* * The spufs fault-handling code needs to call force_sig_fault to raise signals * on DMA errors. Export it here to avoid general kernel-wide access to this * function */ EXPORT_SYMBOL_GPL(force_sig_fault); /* * Protects cbe_spu_info and spu->number. */ static DEFINE_SPINLOCK(spu_lock); /* * List of all spus in the system. * * This list is iterated by callers from irq context and callers that * want to sleep. Thus modifications need to be done with both * spu_full_list_lock and spu_full_list_mutex held, while iterating * through it requires either of these locks. * * In addition spu_full_list_lock protects all assignments to * spu->mm. */ static LIST_HEAD(spu_full_list); static DEFINE_SPINLOCK(spu_full_list_lock); static DEFINE_MUTEX(spu_full_list_mutex); void spu_invalidate_slbs(struct spu *spu) { struct spu_priv2 __iomem *priv2 = spu->priv2; unsigned long flags; spin_lock_irqsave(&spu->register_lock, flags); if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK) out_be64(&priv2->slb_invalidate_all_W, 0UL); spin_unlock_irqrestore(&spu->register_lock, flags); } EXPORT_SYMBOL_GPL(spu_invalidate_slbs); /* This is called by the MM core when a segment size is changed, to * request a flush of all the SPEs using a given mm */ void spu_flush_all_slbs(struct mm_struct *mm) { struct spu *spu; unsigned long flags; spin_lock_irqsave(&spu_full_list_lock, flags); list_for_each_entry(spu, &spu_full_list, full_list) { if (spu->mm == mm) spu_invalidate_slbs(spu); } spin_unlock_irqrestore(&spu_full_list_lock, flags); } /* The hack below stinks... try to do something better one of * these days... Does it even work properly with NR_CPUS == 1 ? */ static inline void mm_needs_global_tlbie(struct mm_struct *mm) { int nr = (NR_CPUS > 1) ? NR_CPUS : NR_CPUS + 1; /* Global TLBIE broadcast required with SPEs. */ bitmap_fill(cpumask_bits(mm_cpumask(mm)), nr); } void spu_associate_mm(struct spu *spu, struct mm_struct *mm) { unsigned long flags; spin_lock_irqsave(&spu_full_list_lock, flags); spu->mm = mm; spin_unlock_irqrestore(&spu_full_list_lock, flags); if (mm) mm_needs_global_tlbie(mm); } EXPORT_SYMBOL_GPL(spu_associate_mm); int spu_64k_pages_available(void) { return mmu_psize_defs[MMU_PAGE_64K].shift != 0; } EXPORT_SYMBOL_GPL(spu_64k_pages_available); static void spu_restart_dma(struct spu *spu) { struct spu_priv2 __iomem *priv2 = spu->priv2; if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags)) out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); else { set_bit(SPU_CONTEXT_FAULT_PENDING, &spu->flags); mb(); } } static inline void spu_load_slb(struct spu *spu, int slbe, struct copro_slb *slb) { struct spu_priv2 __iomem *priv2 = spu->priv2; pr_debug("%s: adding SLB[%d] 0x%016llx 0x%016llx\n", __func__, slbe, slb->vsid, slb->esid); out_be64(&priv2->slb_index_W, slbe); /* set invalid before writing vsid */ out_be64(&priv2->slb_esid_RW, 0); /* now it's safe to write the vsid */ out_be64(&priv2->slb_vsid_RW, slb->vsid); /* setting the new esid makes the entry valid again */ out_be64(&priv2->slb_esid_RW, slb->esid); } static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) { struct copro_slb slb; int ret; ret = copro_calculate_slb(spu->mm, ea, &slb); if (ret) return ret; spu_load_slb(spu, spu->slb_replace, &slb); spu->slb_replace++; if (spu->slb_replace >= 8) spu->slb_replace = 0; spu_restart_dma(spu); spu->stats.slb_flt++; return 0; } extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap, unsigned long dsisr); //XXX static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr) { int ret; pr_debug("%s, %llx, %lx\n", __func__, dsisr, ea); /* * Handle kernel space hash faults immediately. User hash * faults need to be deferred to process context. */ if ((dsisr & MFC_DSISR_PTE_NOT_FOUND) && (get_region_id(ea) != USER_REGION_ID)) { spin_unlock(&spu->register_lock); ret = hash_page(ea, _PAGE_PRESENT | _PAGE_READ | _PAGE_PRIVILEGED, 0x300, dsisr); spin_lock(&spu->register_lock); if (!ret) { spu_restart_dma(spu); return 0; } } spu->class_1_dar = ea; spu->class_1_dsisr = dsisr; spu->stop_callback(spu, 1); spu->class_1_dar = 0; spu->class_1_dsisr = 0; return 0; } static void __spu_kernel_slb(void *addr, struct copro_slb *slb) { unsigned long ea = (unsigned long)addr; u64 llp; if (get_region_id(ea) == LINEAR_MAP_REGION_ID) llp = mmu_psize_defs[mmu_linear_psize].sllp; else llp = mmu_psize_defs[mmu_virtual_psize].sllp; slb->vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | SLB_VSID_KERNEL | llp; slb->esid = (ea & ESID_MASK) | SLB_ESID_V; } /** * Given an array of @nr_slbs SLB entries, @slbs, return non-zero if the * address @new_addr is present. */ static inline int __slb_present(struct copro_slb *slbs, int nr_slbs, void *new_addr) { unsigned long ea = (unsigned long)new_addr; int i; for (i = 0; i < nr_slbs; i++) if (!((slbs[i].esid ^ ea) & ESID_MASK)) return 1; return 0; } /** * Setup the SPU kernel SLBs, in preparation for a context save/restore. We * need to map both the context save area, and the save/restore code. * * Because the lscsa and code may cross segment boundaries, we check to see * if mappings are required for the start and end of each range. We currently * assume that the mappings are smaller that one segment - if not, something * is seriously wrong. */ void spu_setup_kernel_slbs(struct spu *spu, struct spu_lscsa *lscsa, void *code, int code_size) { struct copro_slb slbs[4]; int i, nr_slbs = 0; /* start and end addresses of both mappings */ void *addrs[] = { lscsa, (void *)lscsa + sizeof(*lscsa) - 1, code, code + code_size - 1 }; /* check the set of addresses, and create a new entry in the slbs array * if there isn't already a SLB for that address */ for (i = 0; i < ARRAY_SIZE(addrs); i++) { if (__slb_present(slbs, nr_slbs, addrs[i])) continue; __spu_kernel_slb(addrs[i], &slbs[nr_slbs]); nr_slbs++; } spin_lock_irq(&spu->register_lock); /* Add the set of SLBs */ for (i = 0; i < nr_slbs; i++) spu_load_slb(spu, i, &slbs[i]); spin_unlock_irq(&spu->register_lock); } EXPORT_SYMBOL_GPL(spu_setup_kernel_slbs); static irqreturn_t spu_irq_class_0(int irq, void *data) { struct spu *spu; unsigned long stat, mask; spu = data; spin_lock(&spu->register_lock); mask = spu_int_mask_get(spu, 0); stat = spu_int_stat_get(spu, 0) & mask; spu->class_0_pending |= stat; spu->class_0_dar = spu_mfc_dar_get(spu); spu->stop_callback(spu, 0); spu->class_0_pending = 0; spu->class_0_dar = 0; spu_int_stat_clear(spu, 0, stat); spin_unlock(&spu->register_lock); return IRQ_HANDLED; } static irqreturn_t spu_irq_class_1(int irq, void *data) { struct spu *spu; unsigned long stat, mask, dar, dsisr; spu = data; /* atomically read & clear class1 status. */ spin_lock(&spu->register_lock); mask = spu_int_mask_get(spu, 1); stat = spu_int_stat_get(spu, 1) & mask; dar = spu_mfc_dar_get(spu); dsisr = spu_mfc_dsisr_get(spu); if (stat & CLASS1_STORAGE_FAULT_INTR) spu_mfc_dsisr_set(spu, 0ul); spu_int_stat_clear(spu, 1, stat); pr_debug("%s: %lx %lx %lx %lx\n", __func__, mask, stat, dar, dsisr); if (stat & CLASS1_SEGMENT_FAULT_INTR) __spu_trap_data_seg(spu, dar); if (stat & CLASS1_STORAGE_FAULT_INTR) __spu_trap_data_map(spu, dar, dsisr); if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_GET_INTR) ; if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_PUT_INTR) ; spu->class_1_dsisr = 0; spu->class_1_dar = 0; spin_unlock(&spu->register_lock); return stat ? IRQ_HANDLED : IRQ_NONE; } static irqreturn_t spu_irq_class_2(int irq, void *data) { struct spu *spu; unsigned long stat; unsigned long mask; const int mailbox_intrs = CLASS2_MAILBOX_THRESHOLD_INTR | CLASS2_MAILBOX_INTR; spu = data; spin_lock(&spu->register_lock); stat = spu_int_stat_get(spu, 2); mask = spu_int_mask_get(spu, 2); /* ignore interrupts we're not waiting for */ stat &= mask; /* mailbox interrupts are level triggered. mask them now before * acknowledging */ if (stat & mailbox_intrs) spu_int_mask_and(spu, 2, ~(stat & mailbox_intrs)); /* acknowledge all interrupts before the callbacks */ spu_int_stat_clear(spu, 2, stat); pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask); if (stat & CLASS2_MAILBOX_INTR) spu->ibox_callback(spu); if (stat & CLASS2_SPU_STOP_INTR) spu->stop_callback(spu, 2); if (stat & CLASS2_SPU_HALT_INTR) spu->stop_callback(spu, 2); if (stat & CLASS2_SPU_DMA_TAG_GROUP_COMPLETE_INTR) spu->mfc_callback(spu); if (stat & CLASS2_MAILBOX_THRESHOLD_INTR) spu->wbox_callback(spu); spu->stats.class2_intr++; spin_unlock(&spu->register_lock); return stat ? IRQ_HANDLED : IRQ_NONE; } static int spu_request_irqs(struct spu *spu) { int ret = 0; if (spu->irqs[0]) { snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0", spu->number); ret = request_irq(spu->irqs[0], spu_irq_class_0, 0, spu->irq_c0, spu); if (ret) goto bail0; } if (spu->irqs[1]) { snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1", spu->number); ret = request_irq(spu->irqs[1], spu_irq_class_1, 0, spu->irq_c1, spu); if (ret) goto bail1; } if (spu->irqs[2]) { snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2", spu->number); ret = request_irq(spu->irqs[2], spu_irq_class_2, 0, spu->irq_c2, spu); if (ret) goto bail2; } return 0; bail2: if (spu->irqs[1]) free_irq(spu->irqs[1], spu); bail1: if (spu->irqs[0]) free_irq(spu->irqs[0], spu); bail0: return ret; } static void spu_free_irqs(struct spu *spu) { if (spu->irqs[0]) free_irq(spu->irqs[0], spu); if (spu->irqs[1]) free_irq(spu->irqs[1], spu); if (spu->irqs[2]) free_irq(spu->irqs[2], spu); } void spu_init_channels(struct spu *spu) { static const struct { unsigned channel; unsigned count; } zero_list[] = { { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, }, { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, }, }, count_list[] = { { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, }, { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, }, { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, }, }; struct spu_priv2 __iomem *priv2; int i; priv2 = spu->priv2; /* initialize all channel data to zero */ for (i = 0; i < ARRAY_SIZE(zero_list); i++) { int count; out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel); for (count = 0; count < zero_list[i].count; count++) out_be64(&priv2->spu_chnldata_RW, 0); } /* initialize channel counts to meaningful values */ for (i = 0; i < ARRAY_SIZE(count_list); i++) { out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel); out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count); } } EXPORT_SYMBOL_GPL(spu_init_channels); static struct bus_type spu_subsys = { .name = "spu", .dev_name = "spu", }; int spu_add_dev_attr(struct device_attribute *attr) { struct spu *spu; mutex_lock(&spu_full_list_mutex); list_for_each_entry(spu, &spu_full_list, full_list) device_create_file(&spu->dev, attr); mutex_unlock(&spu_full_list_mutex); return 0; } EXPORT_SYMBOL_GPL(spu_add_dev_attr); int spu_add_dev_attr_group(struct attribute_group *attrs) { struct spu *spu; int rc = 0; mutex_lock(&spu_full_list_mutex); list_for_each_entry(spu, &spu_full_list, full_list) { rc = sysfs_create_group(&spu->dev.kobj, attrs); /* we're in trouble here, but try unwinding anyway */ if (rc) { printk(KERN_ERR "%s: can't create sysfs group '%s'\n", __func__, attrs->name); list_for_each_entry_continue_reverse(spu, &spu_full_list, full_list) sysfs_remove_group(&spu->dev.kobj, attrs); break; } } mutex_unlock(&spu_full_list_mutex); return rc; } EXPORT_SYMBOL_GPL(spu_add_dev_attr_group); void spu_remove_dev_attr(struct device_attribute *attr) { struct spu *spu; mutex_lock(&spu_full_list_mutex); list_for_each_entry(spu, &spu_full_list, full_list) device_remove_file(&spu->dev, attr); mutex_unlock(&spu_full_list_mutex); } EXPORT_SYMBOL_GPL(spu_remove_dev_attr); void spu_remove_dev_attr_group(struct attribute_group *attrs) { struct spu *spu; mutex_lock(&spu_full_list_mutex); list_for_each_entry(spu, &spu_full_list, full_list) sysfs_remove_group(&spu->dev.kobj, attrs); mutex_unlock(&spu_full_list_mutex); } EXPORT_SYMBOL_GPL(spu_remove_dev_attr_group); static int spu_create_dev(struct spu *spu) { int ret; spu->dev.id = spu->number; spu->dev.bus = &spu_subsys; ret = device_register(&spu->dev); if (ret) { printk(KERN_ERR "Can't register SPU %d with sysfs\n", spu->number); return ret; } sysfs_add_device_to_node(&spu->dev, spu->node); return 0; } static int __init create_spu(void *data) { struct spu *spu; int ret; static int number; unsigned long flags; ret = -ENOMEM; spu = kzalloc(sizeof (*spu), GFP_KERNEL); if (!spu) goto out; spu->alloc_state = SPU_FREE; spin_lock_init(&spu->register_lock); spin_lock(&spu_lock); spu->number = number++; spin_unlock(&spu_lock); ret = spu_create_spu(spu, data); if (ret) goto out_free; spu_mfc_sdr_setup(spu); spu_mfc_sr1_set(spu, 0x33); ret = spu_request_irqs(spu); if (ret) goto out_destroy; ret = spu_create_dev(spu); if (ret) goto out_free_irqs; mutex_lock(&cbe_spu_info[spu->node].list_mutex); list_add(&spu->cbe_list, &cbe_spu_info[spu->node].spus); cbe_spu_info[spu->node].n_spus++; mutex_unlock(&cbe_spu_info[spu->node].list_mutex); mutex_lock(&spu_full_list_mutex); spin_lock_irqsave(&spu_full_list_lock, flags); list_add(&spu->full_list, &spu_full_list); spin_unlock_irqrestore(&spu_full_list_lock, flags); mutex_unlock(&spu_full_list_mutex); spu->stats.util_state = SPU_UTIL_IDLE_LOADED; spu->stats.tstamp = ktime_get_ns(); INIT_LIST_HEAD(&spu->aff_list); goto out; out_free_irqs: spu_free_irqs(spu); out_destroy: spu_destroy_spu(spu); out_free: kfree(spu); out: return ret; } static const char *spu_state_names[] = { "user", "system", "iowait", "idle" }; static unsigned long long spu_acct_time(struct spu *spu, enum spu_utilization_state state) { unsigned long long time = spu->stats.times[state]; /* * If the spu is idle or the context is stopped, utilization * statistics are not updated. Apply the time delta from the * last recorded state of the spu. */ if (spu->stats.util_state == state) time += ktime_get_ns() - spu->stats.tstamp; return time / NSEC_PER_MSEC; } static ssize_t spu_stat_show(struct device *dev, struct device_attribute *attr, char *buf) { struct spu *spu = container_of(dev, struct spu, dev); return sprintf(buf, "%s %llu %llu %llu %llu " "%llu %llu %llu %llu %llu %llu %llu %llu\n", spu_state_names[spu->stats.util_state], spu_acct_time(spu, SPU_UTIL_USER), spu_acct_time(spu, SPU_UTIL_SYSTEM), spu_acct_time(spu, SPU_UTIL_IOWAIT), spu_acct_time(spu, SPU_UTIL_IDLE_LOADED), spu->stats.vol_ctx_switch, spu->stats.invol_ctx_switch, spu->stats.slb_flt, spu->stats.hash_flt, spu->stats.min_flt, spu->stats.maj_flt, spu->stats.class2_intr, spu->stats.libassist); } static DEVICE_ATTR(stat, 0444, spu_stat_show, NULL); #ifdef CONFIG_KEXEC_CORE struct crash_spu_info { struct spu *spu; u32 saved_spu_runcntl_RW; u32 saved_spu_status_R; u32 saved_spu_npc_RW; u64 saved_mfc_sr1_RW; u64 saved_mfc_dar; u64 saved_mfc_dsisr; }; #define CRASH_NUM_SPUS 16 /* Enough for current hardware */ static struct crash_spu_info crash_spu_info[CRASH_NUM_SPUS]; static void crash_kexec_stop_spus(void) { struct spu *spu; int i; u64 tmp; for (i = 0; i < CRASH_NUM_SPUS; i++) { if (!crash_spu_info[i].spu) continue; spu = crash_spu_info[i].spu; crash_spu_info[i].saved_spu_runcntl_RW = in_be32(&spu->problem->spu_runcntl_RW); crash_spu_info[i].saved_spu_status_R = in_be32(&spu->problem->spu_status_R); crash_spu_info[i].saved_spu_npc_RW = in_be32(&spu->problem->spu_npc_RW); crash_spu_info[i].saved_mfc_dar = spu_mfc_dar_get(spu); crash_spu_info[i].saved_mfc_dsisr = spu_mfc_dsisr_get(spu); tmp = spu_mfc_sr1_get(spu); crash_spu_info[i].saved_mfc_sr1_RW = tmp; tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; spu_mfc_sr1_set(spu, tmp); __delay(200); } } static void crash_register_spus(struct list_head *list) { struct spu *spu; int ret; list_for_each_entry(spu, list, full_list) { if (WARN_ON(spu->number >= CRASH_NUM_SPUS)) continue; crash_spu_info[spu->number].spu = spu; } ret = crash_shutdown_register(&crash_kexec_stop_spus); if (ret) printk(KERN_ERR "Could not register SPU crash handler"); } #else static inline void crash_register_spus(struct list_head *list) { } #endif static void spu_shutdown(void) { struct spu *spu; mutex_lock(&spu_full_list_mutex); list_for_each_entry(spu, &spu_full_list, full_list) { spu_free_irqs(spu); spu_destroy_spu(spu); } mutex_unlock(&spu_full_list_mutex); } static struct syscore_ops spu_syscore_ops = { .shutdown = spu_shutdown, }; static int __init init_spu_base(void) { int i, ret = 0; for (i = 0; i < MAX_NUMNODES; i++) { mutex_init(&cbe_spu_info[i].list_mutex); INIT_LIST_HEAD(&cbe_spu_info[i].spus); } if (!spu_management_ops) goto out; /* create system subsystem for spus */ ret = subsys_system_register(&spu_subsys, NULL); if (ret) goto out; ret = spu_enumerate_spus(create_spu); if (ret < 0) { printk(KERN_WARNING "%s: Error initializing spus\n", __func__); goto out_unregister_subsys; } if (ret > 0) fb_append_extra_logo(&logo_spe_clut224, ret); mutex_lock(&spu_full_list_mutex); xmon_register_spus(&spu_full_list); crash_register_spus(&spu_full_list); mutex_unlock(&spu_full_list_mutex); spu_add_dev_attr(&dev_attr_stat); register_syscore_ops(&spu_syscore_ops); spu_init_affinity(); return 0; out_unregister_subsys: bus_unregister(&spu_subsys); out: return ret; } device_initcall(init_spu_base); |