arch/powerpc/platforms/cell/spu_base.c

   1 /*
   2  * Low-level SPU handling
   3  *
   4  * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
   5  *
   6  * Author: Arnd Bergmann <arndb@de.ibm.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #undef DEBUG
  24
  25 #include <linux/interrupt.h>
  26 #include <linux/list.h>
  27 #include <linux/module.h>
  28 #include <linux/ptrace.h>
  29 #include <linux/slab.h>
  30 #include <linux/wait.h>
  31 #include <linux/mm.h>
  32 #include <linux/io.h>
  33 #include <linux/mutex.h>
  34 #include <linux/linux_logo.h>
  35 #include <asm/spu.h>
  36 #include <asm/spu_priv1.h>
  37 #include <asm/xmon.h>
  38
  39 const struct spu_management_ops *spu_management_ops;
  40 EXPORT_SYMBOL_GPL(spu_management_ops);
  41
  42 const struct spu_priv1_ops *spu_priv1_ops;
  43
  44 static LIST_HEAD(spu_full_list);
  45 static DEFINE_MUTEX(spu_mutex);
  46 static DEFINE_SPINLOCK(spu_list_lock);
  47
  48 EXPORT_SYMBOL_GPL(spu_priv1_ops);
  49
  50 void spu_invalidate_slbs(struct spu *spu)
  51 {
  52         struct spu_priv2 __iomem *priv2 = spu->priv2;
  53
  54         if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK)
  55                 out_be64(&priv2->slb_invalidate_all_W, 0UL);
  56 }
  57 EXPORT_SYMBOL_GPL(spu_invalidate_slbs);
  58
  59 /* This is called by the MM core when a segment size is changed, to
  60  * request a flush of all the SPEs using a given mm
  61  */
  62 void spu_flush_all_slbs(struct mm_struct *mm)
  63 {
  64         struct spu *spu;
  65         unsigned long flags;
  66
  67         spin_lock_irqsave(&spu_list_lock, flags);
  68         list_for_each_entry(spu, &spu_full_list, full_list) {
  69                 if (spu->mm == mm)
  70                         spu_invalidate_slbs(spu);
  71         }
  72         spin_unlock_irqrestore(&spu_list_lock, flags);
  73 }
  74
  75 /* The hack below stinks... try to do something better one of
  76  * these days... Does it even work properly with NR_CPUS == 1 ?
  77  */
  78 static inline void mm_needs_global_tlbie(struct mm_struct *mm)
  79 {
  80         int nr = (NR_CPUS > 1) ? NR_CPUS : NR_CPUS + 1;
  81
  82         /* Global TLBIE broadcast required with SPEs. */
  83         __cpus_setall(&mm->cpu_vm_mask, nr);
  84 }
  85
  86 void spu_associate_mm(struct spu *spu, struct mm_struct *mm)
  87 {
  88         unsigned long flags;
  89
  90         spin_lock_irqsave(&spu_list_lock, flags);
  91         spu->mm = mm;
  92         spin_unlock_irqrestore(&spu_list_lock, flags);
  93         if (mm)
  94                 mm_needs_global_tlbie(mm);
  95 }
  96 EXPORT_SYMBOL_GPL(spu_associate_mm);
  97
  98 static int __spu_trap_invalid_dma(struct spu *spu)
  99 {
 100         pr_debug("%s\n", __FUNCTION__);
 101         spu->dma_callback(spu, SPE_EVENT_INVALID_DMA);
 102         return 0;
 103 }
 104
 105 static int __spu_trap_dma_align(struct spu *spu)
 106 {
 107         pr_debug("%s\n", __FUNCTION__);
 108         spu->dma_callback(spu, SPE_EVENT_DMA_ALIGNMENT);
 109         return 0;
 110 }
 111
 112 static int __spu_trap_error(struct spu *spu)
 113 {
 114         pr_debug("%s\n", __FUNCTION__);
 115         spu->dma_callback(spu, SPE_EVENT_SPE_ERROR);
 116         return 0;
 117 }
 118
 119 static void spu_restart_dma(struct spu *spu)
 120 {
 121         struct spu_priv2 __iomem *priv2 = spu->priv2;
 122
 123         if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags))
 124                 out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
 125 }
 126
 127 static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
 128 {
 129         struct spu_priv2 __iomem *priv2 = spu->priv2;
 130         struct mm_struct *mm = spu->mm;
 131         u64 esid, vsid, llp;
 132         int psize;
 133
 134         pr_debug("%s\n", __FUNCTION__);
 135
 136         if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
 137                 /* SLBs are pre-loaded for context switch, so
 138                  * we should never get here!
 139                  */
 140                 printk("%s: invalid access during switch!\n", __func__);
 141                 return 1;
 142         }
 143         esid = (ea & ESID_MASK) | SLB_ESID_V;
 144
 145         switch(REGION_ID(ea)) {
 146         case USER_REGION_ID:
 147 #ifdef CONFIG_PPC_MM_SLICES
 148                 psize = get_slice_psize(mm, ea);
 149 #else
 150                 psize = mm->context.user_psize;
 151 #endif
 152                 vsid = (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT) |
 153                                 SLB_VSID_USER;
 154                 break;
 155         case VMALLOC_REGION_ID:
 156                 if (ea < VMALLOC_END)
 157                         psize = mmu_vmalloc_psize;
 158                 else
 159                         psize = mmu_io_psize;
 160                 vsid = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) |
 161                         SLB_VSID_KERNEL;
 162                 break;
 163         case KERNEL_REGION_ID:
 164                 psize = mmu_linear_psize;
 165                 vsid = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) |
 166                         SLB_VSID_KERNEL;
 167                 break;
 168         default:
 169                 /* Future: support kernel segments so that drivers
 170                  * can use SPUs.
 171                  */
 172                 pr_debug("invalid region access at %016lx\n", ea);
 173                 return 1;
 174         }
 175         llp = mmu_psize_defs[psize].sllp;
 176
 177         out_be64(&priv2->slb_index_W, spu->slb_replace);
 178         out_be64(&priv2->slb_vsid_RW, vsid | llp);
 179         out_be64(&priv2->slb_esid_RW, esid);
 180
 181         spu->slb_replace++;
 182         if (spu->slb_replace >= 8)
 183                 spu->slb_replace = 0;
 184
 185         spu_restart_dma(spu);
 186         spu->stats.slb_flt++;
 187         return 0;
 188 }
 189
 190 extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX
 191 static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
 192 {
 193         pr_debug("%s, %lx, %lx\n", __FUNCTION__, dsisr, ea);
 194
 195         /* Handle kernel space hash faults immediately.
 196            User hash faults need to be deferred to process context. */
 197         if ((dsisr & MFC_DSISR_PTE_NOT_FOUND)
 198             && REGION_ID(ea) != USER_REGION_ID
 199             && hash_page(ea, _PAGE_PRESENT, 0x300) == 0) {
 200                 spu_restart_dma(spu);
 201                 return 0;
 202         }
 203
 204         if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
 205                 printk("%s: invalid access during switch!\n", __func__);
 206                 return 1;
 207         }
 208
 209         spu->dar = ea;
 210         spu->dsisr = dsisr;
 211         mb();
 212         spu->stop_callback(spu);
 213         return 0;
 214 }
 215
 216 static irqreturn_t
 217 spu_irq_class_0(int irq, void *data)
 218 {
 219         struct spu *spu;
 220
 221         spu = data;
 222         spu->class_0_pending = 1;
 223         spu->stop_callback(spu);
 224
 225         return IRQ_HANDLED;
 226 }
 227
 228 int
 229 spu_irq_class_0_bottom(struct spu *spu)
 230 {
 231         unsigned long stat, mask;
 232         unsigned long flags;
 233
 234         spu->class_0_pending = 0;
 235
 236         spin_lock_irqsave(&spu->register_lock, flags);
 237         mask = spu_int_mask_get(spu, 0);
 238         stat = spu_int_stat_get(spu, 0);
 239
 240         stat &= mask;
 241
 242         if (stat & 1) /* invalid DMA alignment */
 243                 __spu_trap_dma_align(spu);
 244
 245         if (stat & 2) /* invalid MFC DMA */
 246                 __spu_trap_invalid_dma(spu);
 247
 248         if (stat & 4) /* error on SPU */
 249                 __spu_trap_error(spu);
 250
 251         spu_int_stat_clear(spu, 0, stat);
 252         spin_unlock_irqrestore(&spu->register_lock, flags);
 253
 254         return (stat & 0x7) ? -EIO : 0;
 255 }
 256 EXPORT_SYMBOL_GPL(spu_irq_class_0_bottom);
 257
 258 static irqreturn_t
 259 spu_irq_class_1(int irq, void *data)
 260 {
 261         struct spu *spu;
 262         unsigned long stat, mask, dar, dsisr;
 263
 264         spu = data;
 265
 266         /* atomically read & clear class1 status. */
 267         spin_lock(&spu->register_lock);
 268         mask  = spu_int_mask_get(spu, 1);
 269         stat  = spu_int_stat_get(spu, 1) & mask;
 270         dar   = spu_mfc_dar_get(spu);
 271         dsisr = spu_mfc_dsisr_get(spu);
 272         if (stat & 2) /* mapping fault */
 273                 spu_mfc_dsisr_set(spu, 0ul);
 274         spu_int_stat_clear(spu, 1, stat);
 275         spin_unlock(&spu->register_lock);
 276         pr_debug("%s: %lx %lx %lx %lx\n", __FUNCTION__, mask, stat,
 277                         dar, dsisr);
 278
 279         if (stat & 1) /* segment fault */
 280                 __spu_trap_data_seg(spu, dar);
 281
 282         if (stat & 2) { /* mapping fault */
 283                 __spu_trap_data_map(spu, dar, dsisr);
 284         }
 285
 286         if (stat & 4) /* ls compare & suspend on get */
 287                 ;
 288
 289         if (stat & 8) /* ls compare & suspend on put */
 290                 ;
 291
 292         return stat ? IRQ_HANDLED : IRQ_NONE;
 293 }
 294
 295 static irqreturn_t
 296 spu_irq_class_2(int irq, void *data)
 297 {
 298         struct spu *spu;
 299         unsigned long stat;
 300         unsigned long mask;
 301
 302         spu = data;
 303         spin_lock(&spu->register_lock);
 304         stat = spu_int_stat_get(spu, 2);
 305         mask = spu_int_mask_get(spu, 2);
 306         /* ignore interrupts we're not waiting for */
 307         stat &= mask;
 308         /*
 309          * mailbox interrupts (0x1 and 0x10) are level triggered.
 310          * mask them now before acknowledging.
 311          */
 312         if (stat & 0x11)
 313                 spu_int_mask_and(spu, 2, ~(stat & 0x11));
 314         /* acknowledge all interrupts before the callbacks */
 315         spu_int_stat_clear(spu, 2, stat);
 316         spin_unlock(&spu->register_lock);
 317
 318         pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask);
 319
 320         if (stat & 1)  /* PPC core mailbox */
 321                 spu->ibox_callback(spu);
 322
 323         if (stat & 2) /* SPU stop-and-signal */
 324                 spu->stop_callback(spu);
 325
 326         if (stat & 4) /* SPU halted */
 327                 spu->stop_callback(spu);
 328
 329         if (stat & 8) /* DMA tag group complete */
 330                 spu->mfc_callback(spu);
 331
 332         if (stat & 0x10) /* SPU mailbox threshold */
 333                 spu->wbox_callback(spu);
 334
 335         spu->stats.class2_intr++;
 336         return stat ? IRQ_HANDLED : IRQ_NONE;
 337 }
 338
 339 static int spu_request_irqs(struct spu *spu)
 340 {
 341         int ret = 0;
 342
 343         if (spu->irqs[0] != NO_IRQ) {
 344                 snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0",
 345                          spu->number);
 346                 ret = request_irq(spu->irqs[0], spu_irq_class_0,
 347                                   IRQF_DISABLED,
 348                                   spu->irq_c0, spu);
 349                 if (ret)
 350                         goto bail0;
 351         }
 352         if (spu->irqs[1] != NO_IRQ) {
 353                 snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1",
 354                          spu->number);
 355                 ret = request_irq(spu->irqs[1], spu_irq_class_1,
 356                                   IRQF_DISABLED,
 357                                   spu->irq_c1, spu);
 358                 if (ret)
 359                         goto bail1;
 360         }
 361         if (spu->irqs[2] != NO_IRQ) {
 362                 snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2",
 363                          spu->number);
 364                 ret = request_irq(spu->irqs[2], spu_irq_class_2,
 365                                   IRQF_DISABLED,
 366                                   spu->irq_c2, spu);
 367                 if (ret)
 368                         goto bail2;
 369         }
 370         return 0;
 371
 372 bail2:
 373         if (spu->irqs[1] != NO_IRQ)
 374                 free_irq(spu->irqs[1], spu);
 375 bail1:
 376         if (spu->irqs[0] != NO_IRQ)
 377                 free_irq(spu->irqs[0], spu);
 378 bail0:
 379         return ret;
 380 }
 381
 382 static void spu_free_irqs(struct spu *spu)
 383 {
 384         if (spu->irqs[0] != NO_IRQ)
 385                 free_irq(spu->irqs[0], spu);
 386         if (spu->irqs[1] != NO_IRQ)
 387                 free_irq(spu->irqs[1], spu);
 388         if (spu->irqs[2] != NO_IRQ)
 389                 free_irq(spu->irqs[2], spu);
 390 }
 391
 392 static void spu_init_channels(struct spu *spu)
 393 {
 394         static const struct {
 395                  unsigned channel;
 396                  unsigned count;
 397         } zero_list[] = {
 398                 { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, },
 399                 { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, },
 400         }, count_list[] = {
 401                 { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, },
 402                 { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, },
 403                 { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, },
 404         };
 405         struct spu_priv2 __iomem *priv2;
 406         int i;
 407
 408         priv2 = spu->priv2;
 409
 410         /* initialize all channel data to zero */
 411         for (i = 0; i < ARRAY_SIZE(zero_list); i++) {
 412                 int count;
 413
 414                 out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel);
 415                 for (count = 0; count < zero_list[i].count; count++)
 416                         out_be64(&priv2->spu_chnldata_RW, 0);
 417         }
 418
 419         /* initialize channel counts to meaningful values */
 420         for (i = 0; i < ARRAY_SIZE(count_list); i++) {
 421                 out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel);
 422                 out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count);
 423         }
 424 }
 425
 426 struct spu *spu_alloc_node(int node)
 427 {
 428         struct spu *spu = NULL;
 429
 430         mutex_lock(&spu_mutex);
 431         if (!list_empty(&cbe_spu_info[node].free_spus)) {
 432                 spu = list_entry(cbe_spu_info[node].free_spus.next, struct spu,
 433                                                                         list);
 434                 list_del_init(&spu->list);
 435                 pr_debug("Got SPU %d %d\n", spu->number, spu->node);
 436         }
 437         mutex_unlock(&spu_mutex);
 438
 439         if (spu)
 440                 spu_init_channels(spu);
 441         return spu;
 442 }
 443 EXPORT_SYMBOL_GPL(spu_alloc_node);
 444
 445 struct spu *spu_alloc(void)
 446 {
 447         struct spu *spu = NULL;
 448         int node;
 449
 450         for (node = 0; node < MAX_NUMNODES; node++) {
 451                 spu = spu_alloc_node(node);
 452                 if (spu)
 453                         break;
 454         }
 455
 456         return spu;
 457 }
 458
 459 void spu_free(struct spu *spu)
 460 {
 461         mutex_lock(&spu_mutex);
 462         list_add_tail(&spu->list, &cbe_spu_info[spu->node].free_spus);
 463         mutex_unlock(&spu_mutex);
 464 }
 465 EXPORT_SYMBOL_GPL(spu_free);
 466
 467 static int spu_shutdown(struct sys_device *sysdev)
 468 {
 469         struct spu *spu = container_of(sysdev, struct spu, sysdev);
 470
 471         spu_free_irqs(spu);
 472         spu_destroy_spu(spu);
 473         return 0;
 474 }
 475
 476 struct sysdev_class spu_sysdev_class = {
 477         set_kset_name("spu"),
 478         .shutdown = spu_shutdown,
 479 };
 480
 481 int spu_add_sysdev_attr(struct sysdev_attribute *attr)
 482 {
 483         struct spu *spu;
 484         mutex_lock(&spu_mutex);
 485
 486         list_for_each_entry(spu, &spu_full_list, full_list)
 487                 sysdev_create_file(&spu->sysdev, attr);
 488
 489         mutex_unlock(&spu_mutex);
 490         return 0;
 491 }
 492 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr);
 493
 494 int spu_add_sysdev_attr_group(struct attribute_group *attrs)
 495 {
 496         struct spu *spu;
 497         mutex_lock(&spu_mutex);
 498
 499         list_for_each_entry(spu, &spu_full_list, full_list)
 500                 sysfs_create_group(&spu->sysdev.kobj, attrs);
 501
 502         mutex_unlock(&spu_mutex);
 503         return 0;
 504 }
 505 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr_group);
 506
 507
 508 void spu_remove_sysdev_attr(struct sysdev_attribute *attr)
 509 {
 510         struct spu *spu;
 511         mutex_lock(&spu_mutex);
 512
 513         list_for_each_entry(spu, &spu_full_list, full_list)
 514                 sysdev_remove_file(&spu->sysdev, attr);
 515
 516         mutex_unlock(&spu_mutex);
 517 }
 518 EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr);
 519
 520 void spu_remove_sysdev_attr_group(struct attribute_group *attrs)
 521 {
 522         struct spu *spu;
 523         mutex_lock(&spu_mutex);
 524
 525         list_for_each_entry(spu, &spu_full_list, full_list)
 526                 sysfs_remove_group(&spu->sysdev.kobj, attrs);
 527
 528         mutex_unlock(&spu_mutex);
 529 }
 530 EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr_group);
 531
 532 static int spu_create_sysdev(struct spu *spu)
 533 {
 534         int ret;
 535
 536         spu->sysdev.id = spu->number;
 537         spu->sysdev.cls = &spu_sysdev_class;
 538         ret = sysdev_register(&spu->sysdev);
 539         if (ret) {
 540                 printk(KERN_ERR "Can't register SPU %d with sysfs\n",
 541                                 spu->number);
 542                 return ret;
 543         }
 544
 545         sysfs_add_device_to_node(&spu->sysdev, spu->node);
 546
 547         return 0;
 548 }
 549
 550 static int __init create_spu(void *data)
 551 {
 552         struct spu *spu;
 553         int ret;
 554         static int number;
 555         unsigned long flags;
 556         struct timespec ts;
 557
 558         ret = -ENOMEM;
 559         spu = kzalloc(sizeof (*spu), GFP_KERNEL);
 560         if (!spu)
 561                 goto out;
 562
 563         spin_lock_init(&spu->register_lock);
 564         mutex_lock(&spu_mutex);
 565         spu->number = number++;
 566         mutex_unlock(&spu_mutex);
 567
 568         ret = spu_create_spu(spu, data);
 569
 570         if (ret)
 571                 goto out_free;
 572
 573         spu_mfc_sdr_setup(spu);
 574         spu_mfc_sr1_set(spu, 0x33);
 575         ret = spu_request_irqs(spu);
 576         if (ret)
 577                 goto out_destroy;
 578
 579         ret = spu_create_sysdev(spu);
 580         if (ret)
 581                 goto out_free_irqs;
 582
 583         mutex_lock(&spu_mutex);
 584         spin_lock_irqsave(&spu_list_lock, flags);
 585         list_add(&spu->list, &cbe_spu_info[spu->node].free_spus);
 586         list_add(&spu->cbe_list, &cbe_spu_info[spu->node].spus);
 587         cbe_spu_info[spu->node].n_spus++;
 588         list_add(&spu->full_list, &spu_full_list);
 589         spin_unlock_irqrestore(&spu_list_lock, flags);
 590         mutex_unlock(&spu_mutex);
 591
 592         spu->stats.util_state = SPU_UTIL_IDLE_LOADED;
 593         ktime_get_ts(&ts);
 594         spu->stats.tstamp = timespec_to_ns(&ts);
 595
 596         goto out;
 597
 598 out_free_irqs:
 599         spu_free_irqs(spu);
 600 out_destroy:
 601         spu_destroy_spu(spu);
 602 out_free:
 603         kfree(spu);
 604 out:
 605         return ret;
 606 }
 607
 608 static const char *spu_state_names[] = {
 609         "user", "system", "iowait", "idle"
 610 };
 611
 612 static unsigned long long spu_acct_time(struct spu *spu,
 613                 enum spu_utilization_state state)
 614 {
 615         struct timespec ts;
 616         unsigned long long time = spu->stats.times[state];
 617
 618         /*
 619          * If the spu is idle or the context is stopped, utilization
 620          * statistics are not updated.  Apply the time delta from the
 621          * last recorded state of the spu.
 622          */
 623         if (spu->stats.util_state == state) {
 624                 ktime_get_ts(&ts);
 625                 time += timespec_to_ns(&ts) - spu->stats.tstamp;
 626         }
 627
 628         return time / NSEC_PER_MSEC;
 629 }
 630
 631
 632 static ssize_t spu_stat_show(struct sys_device *sysdev, char *buf)
 633 {
 634         struct spu *spu = container_of(sysdev, struct spu, sysdev);
 635
 636         return sprintf(buf, "%s %llu %llu %llu %llu "
 637                       "%llu %llu %llu %llu %llu %llu %llu %llu\n",
 638                 spu_state_names[spu->stats.util_state],
 639                 spu_acct_time(spu, SPU_UTIL_USER),
 640                 spu_acct_time(spu, SPU_UTIL_SYSTEM),
 641                 spu_acct_time(spu, SPU_UTIL_IOWAIT),
 642                 spu_acct_time(spu, SPU_UTIL_IDLE_LOADED),
 643                 spu->stats.vol_ctx_switch,
 644                 spu->stats.invol_ctx_switch,
 645                 spu->stats.slb_flt,
 646                 spu->stats.hash_flt,
 647                 spu->stats.min_flt,
 648                 spu->stats.maj_flt,
 649                 spu->stats.class2_intr,
 650                 spu->stats.libassist);
 651 }
 652
 653 static SYSDEV_ATTR(stat, 0644, spu_stat_show, NULL);
 654
 655 struct cbe_spu_info cbe_spu_info[MAX_NUMNODES];
 656 EXPORT_SYMBOL_GPL(cbe_spu_info);
 657
 658 static int __init init_spu_base(void)
 659 {
 660         int i, ret = 0;
 661
 662         for (i = 0; i < MAX_NUMNODES; i++) {
 663                 INIT_LIST_HEAD(&cbe_spu_info[i].spus);
 664                 INIT_LIST_HEAD(&cbe_spu_info[i].free_spus);
 665         }
 666
 667         if (!spu_management_ops)
 668                 goto out;
 669
 670         /* create sysdev class for spus */
 671         ret = sysdev_class_register(&spu_sysdev_class);
 672         if (ret)
 673                 goto out;
 674
 675         ret = spu_enumerate_spus(create_spu);
 676
 677         if (ret < 0) {
 678                 printk(KERN_WARNING "%s: Error initializing spus\n",
 679                         __FUNCTION__);
 680                 goto out_unregister_sysdev_class;
 681         }
 682
 683         if (ret > 0) {
 684                 /*
 685                  * We cannot put the forward declaration in
 686                  * <linux/linux_logo.h> because of conflicting session type
 687                  * conflicts for const and __initdata with different compiler
 688                  * versions
 689                  */
 690                 extern const struct linux_logo logo_spe_clut224;
 691
 692                 fb_append_extra_logo(&logo_spe_clut224, ret);
 693         }
 694
 695         xmon_register_spus(&spu_full_list);
 696         crash_register_spus(&spu_full_list);
 697         spu_add_sysdev_attr(&attr_stat);
 698
 699         return 0;
 700
 701  out_unregister_sysdev_class:
 702         sysdev_class_unregister(&spu_sysdev_class);
 703  out:
 704
 705         return ret;
 706 }
 707 module_init(init_spu_base);
 708
 709 MODULE_LICENSE("GPL");
 710 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");