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 #include <asm/prom.h>
  39
  40 const struct spu_management_ops *spu_management_ops;
  41 EXPORT_SYMBOL_GPL(spu_management_ops);
  42
  43 const struct spu_priv1_ops *spu_priv1_ops;
  44 EXPORT_SYMBOL_GPL(spu_priv1_ops);
  45
  46 struct cbe_spu_info cbe_spu_info[MAX_NUMNODES];
  47 EXPORT_SYMBOL_GPL(cbe_spu_info);
  48
  49 /*
  50  * The spufs fault-handling code needs to call force_sig_info to raise signals
  51  * on DMA errors. Export it here to avoid general kernel-wide access to this
  52  * function
  53  */
  54 EXPORT_SYMBOL_GPL(force_sig_info);
  55
  56 /*
  57  * Protects cbe_spu_info and spu->number.
  58  */
  59 static DEFINE_SPINLOCK(spu_lock);
  60
  61 /*
  62  * List of all spus in the system.
  63  *
  64  * This list is iterated by callers from irq context and callers that
  65  * want to sleep.  Thus modifications need to be done with both
  66  * spu_full_list_lock and spu_full_list_mutex held, while iterating
  67  * through it requires either of these locks.
  68  *
  69  * In addition spu_full_list_lock protects all assignmens to
  70  * spu->mm.
  71  */
  72 static LIST_HEAD(spu_full_list);
  73 static DEFINE_SPINLOCK(spu_full_list_lock);
  74 static DEFINE_MUTEX(spu_full_list_mutex);
  75
  76 void spu_invalidate_slbs(struct spu *spu)
  77 {
  78         struct spu_priv2 __iomem *priv2 = spu->priv2;
  79
  80         if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK)
  81                 out_be64(&priv2->slb_invalidate_all_W, 0UL);
  82 }
  83 EXPORT_SYMBOL_GPL(spu_invalidate_slbs);
  84
  85 /* This is called by the MM core when a segment size is changed, to
  86  * request a flush of all the SPEs using a given mm
  87  */
  88 void spu_flush_all_slbs(struct mm_struct *mm)
  89 {
  90         struct spu *spu;
  91         unsigned long flags;
  92
  93         spin_lock_irqsave(&spu_full_list_lock, flags);
  94         list_for_each_entry(spu, &spu_full_list, full_list) {
  95                 if (spu->mm == mm)
  96                         spu_invalidate_slbs(spu);
  97         }
  98         spin_unlock_irqrestore(&spu_full_list_lock, flags);
  99 }
 100
 101 /* The hack below stinks... try to do something better one of
 102  * these days... Does it even work properly with NR_CPUS == 1 ?
 103  */
 104 static inline void mm_needs_global_tlbie(struct mm_struct *mm)
 105 {
 106         int nr = (NR_CPUS > 1) ? NR_CPUS : NR_CPUS + 1;
 107
 108         /* Global TLBIE broadcast required with SPEs. */
 109         __cpus_setall(&mm->cpu_vm_mask, nr);
 110 }
 111
 112 void spu_associate_mm(struct spu *spu, struct mm_struct *mm)
 113 {
 114         unsigned long flags;
 115
 116         spin_lock_irqsave(&spu_full_list_lock, flags);
 117         spu->mm = mm;
 118         spin_unlock_irqrestore(&spu_full_list_lock, flags);
 119         if (mm)
 120                 mm_needs_global_tlbie(mm);
 121 }
 122 EXPORT_SYMBOL_GPL(spu_associate_mm);
 123
 124 static int __spu_trap_invalid_dma(struct spu *spu)
 125 {
 126         pr_debug("%s\n", __FUNCTION__);
 127         spu->dma_callback(spu, SPE_EVENT_INVALID_DMA);
 128         return 0;
 129 }
 130
 131 static int __spu_trap_dma_align(struct spu *spu)
 132 {
 133         pr_debug("%s\n", __FUNCTION__);
 134         spu->dma_callback(spu, SPE_EVENT_DMA_ALIGNMENT);
 135         return 0;
 136 }
 137
 138 static int __spu_trap_error(struct spu *spu)
 139 {
 140         pr_debug("%s\n", __FUNCTION__);
 141         spu->dma_callback(spu, SPE_EVENT_SPE_ERROR);
 142         return 0;
 143 }
 144
 145 static void spu_restart_dma(struct spu *spu)
 146 {
 147         struct spu_priv2 __iomem *priv2 = spu->priv2;
 148
 149         if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags))
 150                 out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
 151 }
 152
 153 static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
 154 {
 155         struct spu_priv2 __iomem *priv2 = spu->priv2;
 156         struct mm_struct *mm = spu->mm;
 157         u64 esid, vsid, llp;
 158         int psize;
 159
 160         pr_debug("%s\n", __FUNCTION__);
 161
 162         if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
 163                 /* SLBs are pre-loaded for context switch, so
 164                  * we should never get here!
 165                  */
 166                 printk("%s: invalid access during switch!\n", __func__);
 167                 return 1;
 168         }
 169         esid = (ea & ESID_MASK) | SLB_ESID_V;
 170
 171         switch(REGION_ID(ea)) {
 172         case USER_REGION_ID:
 173 #ifdef CONFIG_PPC_MM_SLICES
 174                 psize = get_slice_psize(mm, ea);
 175 #else
 176                 psize = mm->context.user_psize;
 177 #endif
 178                 vsid = (get_vsid(mm->context.id, ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) |
 179                                 SLB_VSID_USER;
 180                 break;
 181         case VMALLOC_REGION_ID:
 182                 if (ea < VMALLOC_END)
 183                         psize = mmu_vmalloc_psize;
 184                 else
 185                         psize = mmu_io_psize;
 186                 vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) |
 187                         SLB_VSID_KERNEL;
 188                 break;
 189         case KERNEL_REGION_ID:
 190                 psize = mmu_linear_psize;
 191                 vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) |
 192                         SLB_VSID_KERNEL;
 193                 break;
 194         default:
 195                 /* Future: support kernel segments so that drivers
 196                  * can use SPUs.
 197                  */
 198                 pr_debug("invalid region access at %016lx\n", ea);
 199                 return 1;
 200         }
 201         llp = mmu_psize_defs[psize].sllp;
 202
 203         out_be64(&priv2->slb_index_W, spu->slb_replace);
 204         out_be64(&priv2->slb_vsid_RW, vsid | llp);
 205         out_be64(&priv2->slb_esid_RW, esid);
 206
 207         spu->slb_replace++;
 208         if (spu->slb_replace >= 8)
 209                 spu->slb_replace = 0;
 210
 211         spu_restart_dma(spu);
 212         spu->stats.slb_flt++;
 213         return 0;
 214 }
 215
 216 extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX
 217 static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
 218 {
 219         pr_debug("%s, %lx, %lx\n", __FUNCTION__, dsisr, ea);
 220
 221         /* Handle kernel space hash faults immediately.
 222            User hash faults need to be deferred to process context. */
 223         if ((dsisr & MFC_DSISR_PTE_NOT_FOUND)
 224             && REGION_ID(ea) != USER_REGION_ID
 225             && hash_page(ea, _PAGE_PRESENT, 0x300) == 0) {
 226                 spu_restart_dma(spu);
 227                 return 0;
 228         }
 229
 230         if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
 231                 printk("%s: invalid access during switch!\n", __func__);
 232                 return 1;
 233         }
 234
 235         spu->dar = ea;
 236         spu->dsisr = dsisr;
 237         mb();
 238         spu->stop_callback(spu);
 239         return 0;
 240 }
 241
 242 static irqreturn_t
 243 spu_irq_class_0(int irq, void *data)
 244 {
 245         struct spu *spu;
 246         unsigned long stat, mask;
 247
 248         spu = data;
 249
 250         mask = spu_int_mask_get(spu, 0);
 251         stat = spu_int_stat_get(spu, 0);
 252         stat &= mask;
 253
 254         spin_lock(&spu->register_lock);
 255         spu->class_0_pending |= stat;
 256         spin_unlock(&spu->register_lock);
 257
 258         spu->stop_callback(spu);
 259
 260         spu_int_stat_clear(spu, 0, stat);
 261
 262         return IRQ_HANDLED;
 263 }
 264
 265 int
 266 spu_irq_class_0_bottom(struct spu *spu)
 267 {
 268         unsigned long flags;
 269         unsigned long stat;
 270
 271         spin_lock_irqsave(&spu->register_lock, flags);
 272         stat = spu->class_0_pending;
 273         spu->class_0_pending = 0;
 274
 275         if (stat & 1) /* invalid DMA alignment */
 276                 __spu_trap_dma_align(spu);
 277
 278         if (stat & 2) /* invalid MFC DMA */
 279                 __spu_trap_invalid_dma(spu);
 280
 281         if (stat & 4) /* error on SPU */
 282                 __spu_trap_error(spu);
 283
 284         spin_unlock_irqrestore(&spu->register_lock, flags);
 285
 286         return (stat & 0x7) ? -EIO : 0;
 287 }
 288 EXPORT_SYMBOL_GPL(spu_irq_class_0_bottom);
 289
 290 static irqreturn_t
 291 spu_irq_class_1(int irq, void *data)
 292 {
 293         struct spu *spu;
 294         unsigned long stat, mask, dar, dsisr;
 295
 296         spu = data;
 297
 298         /* atomically read & clear class1 status. */
 299         spin_lock(&spu->register_lock);
 300         mask  = spu_int_mask_get(spu, 1);
 301         stat  = spu_int_stat_get(spu, 1) & mask;
 302         dar   = spu_mfc_dar_get(spu);
 303         dsisr = spu_mfc_dsisr_get(spu);
 304         if (stat & 2) /* mapping fault */
 305                 spu_mfc_dsisr_set(spu, 0ul);
 306         spu_int_stat_clear(spu, 1, stat);
 307         spin_unlock(&spu->register_lock);
 308         pr_debug("%s: %lx %lx %lx %lx\n", __FUNCTION__, mask, stat,
 309                         dar, dsisr);
 310
 311         if (stat & 1) /* segment fault */
 312                 __spu_trap_data_seg(spu, dar);
 313
 314         if (stat & 2) { /* mapping fault */
 315                 __spu_trap_data_map(spu, dar, dsisr);
 316         }
 317
 318         if (stat & 4) /* ls compare & suspend on get */
 319                 ;
 320
 321         if (stat & 8) /* ls compare & suspend on put */
 322                 ;
 323
 324         return stat ? IRQ_HANDLED : IRQ_NONE;
 325 }
 326
 327 static irqreturn_t
 328 spu_irq_class_2(int irq, void *data)
 329 {
 330         struct spu *spu;
 331         unsigned long stat;
 332         unsigned long mask;
 333
 334         spu = data;
 335         spin_lock(&spu->register_lock);
 336         stat = spu_int_stat_get(spu, 2);
 337         mask = spu_int_mask_get(spu, 2);
 338         /* ignore interrupts we're not waiting for */
 339         stat &= mask;
 340         /*
 341          * mailbox interrupts (0x1 and 0x10) are level triggered.
 342          * mask them now before acknowledging.
 343          */
 344         if (stat & 0x11)
 345                 spu_int_mask_and(spu, 2, ~(stat & 0x11));
 346         /* acknowledge all interrupts before the callbacks */
 347         spu_int_stat_clear(spu, 2, stat);
 348         spin_unlock(&spu->register_lock);
 349
 350         pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask);
 351
 352         if (stat & 1)  /* PPC core mailbox */
 353                 spu->ibox_callback(spu);
 354
 355         if (stat & 2) /* SPU stop-and-signal */
 356                 spu->stop_callback(spu);
 357
 358         if (stat & 4) /* SPU halted */
 359                 spu->stop_callback(spu);
 360
 361         if (stat & 8) /* DMA tag group complete */
 362                 spu->mfc_callback(spu);
 363
 364         if (stat & 0x10) /* SPU mailbox threshold */
 365                 spu->wbox_callback(spu);
 366
 367         spu->stats.class2_intr++;
 368         return stat ? IRQ_HANDLED : IRQ_NONE;
 369 }
 370
 371 static int spu_request_irqs(struct spu *spu)
 372 {
 373         int ret = 0;
 374
 375         if (spu->irqs[0] != NO_IRQ) {
 376                 snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0",
 377                          spu->number);
 378                 ret = request_irq(spu->irqs[0], spu_irq_class_0,
 379                                   IRQF_DISABLED,
 380                                   spu->irq_c0, spu);
 381                 if (ret)
 382                         goto bail0;
 383         }
 384         if (spu->irqs[1] != NO_IRQ) {
 385                 snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1",
 386                          spu->number);
 387                 ret = request_irq(spu->irqs[1], spu_irq_class_1,
 388                                   IRQF_DISABLED,
 389                                   spu->irq_c1, spu);
 390                 if (ret)
 391                         goto bail1;
 392         }
 393         if (spu->irqs[2] != NO_IRQ) {
 394                 snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2",
 395                          spu->number);
 396                 ret = request_irq(spu->irqs[2], spu_irq_class_2,
 397                                   IRQF_DISABLED,
 398                                   spu->irq_c2, spu);
 399                 if (ret)
 400                         goto bail2;
 401         }
 402         return 0;
 403
 404 bail2:
 405         if (spu->irqs[1] != NO_IRQ)
 406                 free_irq(spu->irqs[1], spu);
 407 bail1:
 408         if (spu->irqs[0] != NO_IRQ)
 409                 free_irq(spu->irqs[0], spu);
 410 bail0:
 411         return ret;
 412 }
 413
 414 static void spu_free_irqs(struct spu *spu)
 415 {
 416         if (spu->irqs[0] != NO_IRQ)
 417                 free_irq(spu->irqs[0], spu);
 418         if (spu->irqs[1] != NO_IRQ)
 419                 free_irq(spu->irqs[1], spu);
 420         if (spu->irqs[2] != NO_IRQ)
 421                 free_irq(spu->irqs[2], spu);
 422 }
 423
 424 void spu_init_channels(struct spu *spu)
 425 {
 426         static const struct {
 427                  unsigned channel;
 428                  unsigned count;
 429         } zero_list[] = {
 430                 { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, },
 431                 { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, },
 432         }, count_list[] = {
 433                 { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, },
 434                 { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, },
 435                 { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, },
 436         };
 437         struct spu_priv2 __iomem *priv2;
 438         int i;
 439
 440         priv2 = spu->priv2;
 441
 442         /* initialize all channel data to zero */
 443         for (i = 0; i < ARRAY_SIZE(zero_list); i++) {
 444                 int count;
 445
 446                 out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel);
 447                 for (count = 0; count < zero_list[i].count; count++)
 448                         out_be64(&priv2->spu_chnldata_RW, 0);
 449         }
 450
 451         /* initialize channel counts to meaningful values */
 452         for (i = 0; i < ARRAY_SIZE(count_list); i++) {
 453                 out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel);
 454                 out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count);
 455         }
 456 }
 457 EXPORT_SYMBOL_GPL(spu_init_channels);
 458
 459 static int spu_shutdown(struct sys_device *sysdev)
 460 {
 461         struct spu *spu = container_of(sysdev, struct spu, sysdev);
 462
 463         spu_free_irqs(spu);
 464         spu_destroy_spu(spu);
 465         return 0;
 466 }
 467
 468 static struct sysdev_class spu_sysdev_class = {
 469         set_kset_name("spu"),
 470         .shutdown = spu_shutdown,
 471 };
 472
 473 int spu_add_sysdev_attr(struct sysdev_attribute *attr)
 474 {
 475         struct spu *spu;
 476
 477         mutex_lock(&spu_full_list_mutex);
 478         list_for_each_entry(spu, &spu_full_list, full_list)
 479                 sysdev_create_file(&spu->sysdev, attr);
 480         mutex_unlock(&spu_full_list_mutex);
 481
 482         return 0;
 483 }
 484 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr);
 485
 486 int spu_add_sysdev_attr_group(struct attribute_group *attrs)
 487 {
 488         struct spu *spu;
 489
 490         mutex_lock(&spu_full_list_mutex);
 491         list_for_each_entry(spu, &spu_full_list, full_list)
 492                 sysfs_create_group(&spu->sysdev.kobj, attrs);
 493         mutex_unlock(&spu_full_list_mutex);
 494
 495         return 0;
 496 }
 497 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr_group);
 498
 499
 500 void spu_remove_sysdev_attr(struct sysdev_attribute *attr)
 501 {
 502         struct spu *spu;
 503
 504         mutex_lock(&spu_full_list_mutex);
 505         list_for_each_entry(spu, &spu_full_list, full_list)
 506                 sysdev_remove_file(&spu->sysdev, attr);
 507         mutex_unlock(&spu_full_list_mutex);
 508 }
 509 EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr);
 510
 511 void spu_remove_sysdev_attr_group(struct attribute_group *attrs)
 512 {
 513         struct spu *spu;
 514
 515         mutex_lock(&spu_full_list_mutex);
 516         list_for_each_entry(spu, &spu_full_list, full_list)
 517                 sysfs_remove_group(&spu->sysdev.kobj, attrs);
 518         mutex_unlock(&spu_full_list_mutex);
 519 }
 520 EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr_group);
 521
 522 static int spu_create_sysdev(struct spu *spu)
 523 {
 524         int ret;
 525
 526         spu->sysdev.id = spu->number;
 527         spu->sysdev.cls = &spu_sysdev_class;
 528         ret = sysdev_register(&spu->sysdev);
 529         if (ret) {
 530                 printk(KERN_ERR "Can't register SPU %d with sysfs\n",
 531                                 spu->number);
 532                 return ret;
 533         }
 534
 535         sysfs_add_device_to_node(&spu->sysdev, spu->node);
 536
 537         return 0;
 538 }
 539
 540 static int __init create_spu(void *data)
 541 {
 542         struct spu *spu;
 543         int ret;
 544         static int number;
 545         unsigned long flags;
 546         struct timespec ts;
 547
 548         ret = -ENOMEM;
 549         spu = kzalloc(sizeof (*spu), GFP_KERNEL);
 550         if (!spu)
 551                 goto out;
 552
 553         spu->alloc_state = SPU_FREE;
 554
 555         spin_lock_init(&spu->register_lock);
 556         spin_lock(&spu_lock);
 557         spu->number = number++;
 558         spin_unlock(&spu_lock);
 559
 560         ret = spu_create_spu(spu, data);
 561
 562         if (ret)
 563                 goto out_free;
 564
 565         spu_mfc_sdr_setup(spu);
 566         spu_mfc_sr1_set(spu, 0x33);
 567         ret = spu_request_irqs(spu);
 568         if (ret)
 569                 goto out_destroy;
 570
 571         ret = spu_create_sysdev(spu);
 572         if (ret)
 573                 goto out_free_irqs;
 574
 575         mutex_lock(&cbe_spu_info[spu->node].list_mutex);
 576         list_add(&spu->cbe_list, &cbe_spu_info[spu->node].spus);
 577         cbe_spu_info[spu->node].n_spus++;
 578         mutex_unlock(&cbe_spu_info[spu->node].list_mutex);
 579
 580         mutex_lock(&spu_full_list_mutex);
 581         spin_lock_irqsave(&spu_full_list_lock, flags);
 582         list_add(&spu->full_list, &spu_full_list);
 583         spin_unlock_irqrestore(&spu_full_list_lock, flags);
 584         mutex_unlock(&spu_full_list_mutex);
 585
 586         spu->stats.util_state = SPU_UTIL_IDLE_LOADED;
 587         ktime_get_ts(&ts);
 588         spu->stats.tstamp = timespec_to_ns(&ts);
 589
 590         INIT_LIST_HEAD(&spu->aff_list);
 591
 592         goto out;
 593
 594 out_free_irqs:
 595         spu_free_irqs(spu);
 596 out_destroy:
 597         spu_destroy_spu(spu);
 598 out_free:
 599         kfree(spu);
 600 out:
 601         return ret;
 602 }
 603
 604 static const char *spu_state_names[] = {
 605         "user", "system", "iowait", "idle"
 606 };
 607
 608 static unsigned long long spu_acct_time(struct spu *spu,
 609                 enum spu_utilization_state state)
 610 {
 611         struct timespec ts;
 612         unsigned long long time = spu->stats.times[state];
 613
 614         /*
 615          * If the spu is idle or the context is stopped, utilization
 616          * statistics are not updated.  Apply the time delta from the
 617          * last recorded state of the spu.
 618          */
 619         if (spu->stats.util_state == state) {
 620                 ktime_get_ts(&ts);
 621                 time += timespec_to_ns(&ts) - spu->stats.tstamp;
 622         }
 623
 624         return time / NSEC_PER_MSEC;
 625 }
 626
 627
 628 static ssize_t spu_stat_show(struct sys_device *sysdev, char *buf)
 629 {
 630         struct spu *spu = container_of(sysdev, struct spu, sysdev);
 631
 632         return sprintf(buf, "%s %llu %llu %llu %llu "
 633                       "%llu %llu %llu %llu %llu %llu %llu %llu\n",
 634                 spu_state_names[spu->stats.util_state],
 635                 spu_acct_time(spu, SPU_UTIL_USER),
 636                 spu_acct_time(spu, SPU_UTIL_SYSTEM),
 637                 spu_acct_time(spu, SPU_UTIL_IOWAIT),
 638                 spu_acct_time(spu, SPU_UTIL_IDLE_LOADED),
 639                 spu->stats.vol_ctx_switch,
 640                 spu->stats.invol_ctx_switch,
 641                 spu->stats.slb_flt,
 642                 spu->stats.hash_flt,
 643                 spu->stats.min_flt,
 644                 spu->stats.maj_flt,
 645                 spu->stats.class2_intr,
 646                 spu->stats.libassist);
 647 }
 648
 649 static SYSDEV_ATTR(stat, 0644, spu_stat_show, NULL);
 650
 651 static int __init init_spu_base(void)
 652 {
 653         int i, ret = 0;
 654
 655         for (i = 0; i < MAX_NUMNODES; i++) {
 656                 mutex_init(&cbe_spu_info[i].list_mutex);
 657                 INIT_LIST_HEAD(&cbe_spu_info[i].spus);
 658         }
 659
 660         if (!spu_management_ops)
 661                 goto out;
 662
 663         /* create sysdev class for spus */
 664         ret = sysdev_class_register(&spu_sysdev_class);
 665         if (ret)
 666                 goto out;
 667
 668         ret = spu_enumerate_spus(create_spu);
 669
 670         if (ret < 0) {
 671                 printk(KERN_WARNING "%s: Error initializing spus\n",
 672                         __FUNCTION__);
 673                 goto out_unregister_sysdev_class;
 674         }
 675
 676         if (ret > 0) {
 677                 /*
 678                  * We cannot put the forward declaration in
 679                  * <linux/linux_logo.h> because of conflicting session type
 680                  * conflicts for const and __initdata with different compiler
 681                  * versions
 682                  */
 683                 extern const struct linux_logo logo_spe_clut224;
 684
 685                 fb_append_extra_logo(&logo_spe_clut224, ret);
 686         }
 687
 688         mutex_lock(&spu_full_list_mutex);
 689         xmon_register_spus(&spu_full_list);
 690         crash_register_spus(&spu_full_list);
 691         mutex_unlock(&spu_full_list_mutex);
 692         spu_add_sysdev_attr(&attr_stat);
 693
 694         spu_init_affinity();
 695
 696         return 0;
 697
 698  out_unregister_sysdev_class:
 699         sysdev_class_unregister(&spu_sysdev_class);
 700  out:
 701         return ret;
 702 }
 703 module_init(init_spu_base);
 704
 705 MODULE_LICENSE("GPL");
 706 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");