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/spu_csa.h> 38 #include <asm/xmon.h> 39 #include <asm/prom.h> 40 41 const struct spu_management_ops *spu_management_ops; 42 EXPORT_SYMBOL_GPL(spu_management_ops); 43 44 const struct spu_priv1_ops *spu_priv1_ops; 45 EXPORT_SYMBOL_GPL(spu_priv1_ops); 46 47 struct cbe_spu_info cbe_spu_info[MAX_NUMNODES]; 48 EXPORT_SYMBOL_GPL(cbe_spu_info); 49 50 /* 51 * The spufs fault-handling code needs to call force_sig_info to raise signals 52 * on DMA errors. Export it here to avoid general kernel-wide access to this 53 * function 54 */ 55 EXPORT_SYMBOL_GPL(force_sig_info); 56 57 /* 58 * Protects cbe_spu_info and spu->number. 59 */ 60 static DEFINE_SPINLOCK(spu_lock); 61 62 /* 63 * List of all spus in the system. 64 * 65 * This list is iterated by callers from irq context and callers that 66 * want to sleep. Thus modifications need to be done with both 67 * spu_full_list_lock and spu_full_list_mutex held, while iterating 68 * through it requires either of these locks. 69 * 70 * In addition spu_full_list_lock protects all assignmens to 71 * spu->mm. 72 */ 73 static LIST_HEAD(spu_full_list); 74 static DEFINE_SPINLOCK(spu_full_list_lock); 75 static DEFINE_MUTEX(spu_full_list_mutex); 76 77 struct spu_slb { 78 u64 esid, vsid; 79 }; 80 81 void spu_invalidate_slbs(struct spu *spu) 82 { 83 struct spu_priv2 __iomem *priv2 = spu->priv2; 84 unsigned long flags; 85 86 spin_lock_irqsave(&spu->register_lock, flags); 87 if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK) 88 out_be64(&priv2->slb_invalidate_all_W, 0UL); 89 spin_unlock_irqrestore(&spu->register_lock, flags); 90 } 91 EXPORT_SYMBOL_GPL(spu_invalidate_slbs); 92 93 /* This is called by the MM core when a segment size is changed, to 94 * request a flush of all the SPEs using a given mm 95 */ 96 void spu_flush_all_slbs(struct mm_struct *mm) 97 { 98 struct spu *spu; 99 unsigned long flags; 100 101 spin_lock_irqsave(&spu_full_list_lock, flags); 102 list_for_each_entry(spu, &spu_full_list, full_list) { 103 if (spu->mm == mm) 104 spu_invalidate_slbs(spu); 105 } 106 spin_unlock_irqrestore(&spu_full_list_lock, flags); 107 } 108 109 /* The hack below stinks... try to do something better one of 110 * these days... Does it even work properly with NR_CPUS == 1 ? 111 */ 112 static inline void mm_needs_global_tlbie(struct mm_struct *mm) 113 { 114 int nr = (NR_CPUS > 1) ? NR_CPUS : NR_CPUS + 1; 115 116 /* Global TLBIE broadcast required with SPEs. */ 117 __cpus_setall(&mm->cpu_vm_mask, nr); 118 } 119 120 void spu_associate_mm(struct spu *spu, struct mm_struct *mm) 121 { 122 unsigned long flags; 123 124 spin_lock_irqsave(&spu_full_list_lock, flags); 125 spu->mm = mm; 126 spin_unlock_irqrestore(&spu_full_list_lock, flags); 127 if (mm) 128 mm_needs_global_tlbie(mm); 129 } 130 EXPORT_SYMBOL_GPL(spu_associate_mm); 131 132 int spu_64k_pages_available(void) 133 { 134 return mmu_psize_defs[MMU_PAGE_64K].shift != 0; 135 } 136 EXPORT_SYMBOL_GPL(spu_64k_pages_available); 137 138 static void spu_restart_dma(struct spu *spu) 139 { 140 struct spu_priv2 __iomem *priv2 = spu->priv2; 141 142 if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags)) 143 out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); 144 } 145 146 static inline void spu_load_slb(struct spu *spu, int slbe, struct spu_slb *slb) 147 { 148 struct spu_priv2 __iomem *priv2 = spu->priv2; 149 150 pr_debug("%s: adding SLB[%d] 0x%016lx 0x%016lx\n", 151 __func__, slbe, slb->vsid, slb->esid); 152 153 out_be64(&priv2->slb_index_W, slbe); 154 /* set invalid before writing vsid */ 155 out_be64(&priv2->slb_esid_RW, 0); 156 /* now it's safe to write the vsid */ 157 out_be64(&priv2->slb_vsid_RW, slb->vsid); 158 /* setting the new esid makes the entry valid again */ 159 out_be64(&priv2->slb_esid_RW, slb->esid); 160 } 161 162 static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) 163 { 164 struct mm_struct *mm = spu->mm; 165 struct spu_slb slb; 166 int psize; 167 168 pr_debug("%s\n", __FUNCTION__); 169 170 slb.esid = (ea & ESID_MASK) | SLB_ESID_V; 171 172 switch(REGION_ID(ea)) { 173 case USER_REGION_ID: 174 #ifdef CONFIG_PPC_MM_SLICES 175 psize = get_slice_psize(mm, ea); 176 #else 177 psize = mm->context.user_psize; 178 #endif 179 slb.vsid = (get_vsid(mm->context.id, ea, MMU_SEGSIZE_256M) 180 << SLB_VSID_SHIFT) | SLB_VSID_USER; 181 break; 182 case VMALLOC_REGION_ID: 183 if (ea < VMALLOC_END) 184 psize = mmu_vmalloc_psize; 185 else 186 psize = mmu_io_psize; 187 slb.vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) 188 << SLB_VSID_SHIFT) | SLB_VSID_KERNEL; 189 break; 190 case KERNEL_REGION_ID: 191 psize = mmu_linear_psize; 192 slb.vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) 193 << SLB_VSID_SHIFT) | SLB_VSID_KERNEL; 194 break; 195 default: 196 /* Future: support kernel segments so that drivers 197 * can use SPUs. 198 */ 199 pr_debug("invalid region access at %016lx\n", ea); 200 return 1; 201 } 202 slb.vsid |= mmu_psize_defs[psize].sllp; 203 204 spu_load_slb(spu, spu->slb_replace, &slb); 205 206 spu->slb_replace++; 207 if (spu->slb_replace >= 8) 208 spu->slb_replace = 0; 209 210 spu_restart_dma(spu); 211 spu->stats.slb_flt++; 212 return 0; 213 } 214 215 extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX 216 static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr) 217 { 218 pr_debug("%s, %lx, %lx\n", __FUNCTION__, dsisr, ea); 219 220 /* Handle kernel space hash faults immediately. 221 User hash faults need to be deferred to process context. */ 222 if ((dsisr & MFC_DSISR_PTE_NOT_FOUND) 223 && REGION_ID(ea) != USER_REGION_ID 224 && hash_page(ea, _PAGE_PRESENT, 0x300) == 0) { 225 spu_restart_dma(spu); 226 return 0; 227 } 228 229 spu->class_0_pending = 0; 230 spu->dar = ea; 231 spu->dsisr = dsisr; 232 233 spu->stop_callback(spu); 234 235 return 0; 236 } 237 238 static void __spu_kernel_slb(void *addr, struct spu_slb *slb) 239 { 240 unsigned long ea = (unsigned long)addr; 241 u64 llp; 242 243 if (REGION_ID(ea) == KERNEL_REGION_ID) 244 llp = mmu_psize_defs[mmu_linear_psize].sllp; 245 else 246 llp = mmu_psize_defs[mmu_virtual_psize].sllp; 247 248 slb->vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | 249 SLB_VSID_KERNEL | llp; 250 slb->esid = (ea & ESID_MASK) | SLB_ESID_V; 251 } 252 253 /** 254 * Given an array of @nr_slbs SLB entries, @slbs, return non-zero if the 255 * address @new_addr is present. 256 */ 257 static inline int __slb_present(struct spu_slb *slbs, int nr_slbs, 258 void *new_addr) 259 { 260 unsigned long ea = (unsigned long)new_addr; 261 int i; 262 263 for (i = 0; i < nr_slbs; i++) 264 if (!((slbs[i].esid ^ ea) & ESID_MASK)) 265 return 1; 266 267 return 0; 268 } 269 270 /** 271 * Setup the SPU kernel SLBs, in preparation for a context save/restore. We 272 * need to map both the context save area, and the save/restore code. 273 * 274 * Because the lscsa and code may cross segment boundaires, we check to see 275 * if mappings are required for the start and end of each range. We currently 276 * assume that the mappings are smaller that one segment - if not, something 277 * is seriously wrong. 278 */ 279 void spu_setup_kernel_slbs(struct spu *spu, struct spu_lscsa *lscsa, 280 void *code, int code_size) 281 { 282 struct spu_slb slbs[4]; 283 int i, nr_slbs = 0; 284 /* start and end addresses of both mappings */ 285 void *addrs[] = { 286 lscsa, (void *)lscsa + sizeof(*lscsa) - 1, 287 code, code + code_size - 1 288 }; 289 290 /* check the set of addresses, and create a new entry in the slbs array 291 * if there isn't already a SLB for that address */ 292 for (i = 0; i < ARRAY_SIZE(addrs); i++) { 293 if (__slb_present(slbs, nr_slbs, addrs[i])) 294 continue; 295 296 __spu_kernel_slb(addrs[i], &slbs[nr_slbs]); 297 nr_slbs++; 298 } 299 300 spin_lock_irq(&spu->register_lock); 301 /* Add the set of SLBs */ 302 for (i = 0; i < nr_slbs; i++) 303 spu_load_slb(spu, i, &slbs[i]); 304 spin_unlock_irq(&spu->register_lock); 305 } 306 EXPORT_SYMBOL_GPL(spu_setup_kernel_slbs); 307 308 static irqreturn_t 309 spu_irq_class_0(int irq, void *data) 310 { 311 struct spu *spu; 312 unsigned long stat, mask; 313 314 spu = data; 315 316 spin_lock(&spu->register_lock); 317 mask = spu_int_mask_get(spu, 0); 318 stat = spu_int_stat_get(spu, 0) & mask; 319 320 spu->class_0_pending |= stat; 321 spu->dsisr = spu_mfc_dsisr_get(spu); 322 spu->dar = spu_mfc_dar_get(spu); 323 spin_unlock(&spu->register_lock); 324 325 spu->stop_callback(spu); 326 327 spu_int_stat_clear(spu, 0, stat); 328 329 return IRQ_HANDLED; 330 } 331 332 static irqreturn_t 333 spu_irq_class_1(int irq, void *data) 334 { 335 struct spu *spu; 336 unsigned long stat, mask, dar, dsisr; 337 338 spu = data; 339 340 /* atomically read & clear class1 status. */ 341 spin_lock(&spu->register_lock); 342 mask = spu_int_mask_get(spu, 1); 343 stat = spu_int_stat_get(spu, 1) & mask; 344 dar = spu_mfc_dar_get(spu); 345 dsisr = spu_mfc_dsisr_get(spu); 346 if (stat & CLASS1_STORAGE_FAULT_INTR) 347 spu_mfc_dsisr_set(spu, 0ul); 348 spu_int_stat_clear(spu, 1, stat); 349 350 if (stat & CLASS1_SEGMENT_FAULT_INTR) 351 __spu_trap_data_seg(spu, dar); 352 353 spin_unlock(&spu->register_lock); 354 pr_debug("%s: %lx %lx %lx %lx\n", __FUNCTION__, mask, stat, 355 dar, dsisr); 356 357 if (stat & CLASS1_STORAGE_FAULT_INTR) 358 __spu_trap_data_map(spu, dar, dsisr); 359 360 if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_GET_INTR) 361 ; 362 363 if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_PUT_INTR) 364 ; 365 366 return stat ? IRQ_HANDLED : IRQ_NONE; 367 } 368 369 static irqreturn_t 370 spu_irq_class_2(int irq, void *data) 371 { 372 struct spu *spu; 373 unsigned long stat; 374 unsigned long mask; 375 const int mailbox_intrs = 376 CLASS2_MAILBOX_THRESHOLD_INTR | CLASS2_MAILBOX_INTR; 377 378 spu = data; 379 spin_lock(&spu->register_lock); 380 stat = spu_int_stat_get(spu, 2); 381 mask = spu_int_mask_get(spu, 2); 382 /* ignore interrupts we're not waiting for */ 383 stat &= mask; 384 385 /* mailbox interrupts are level triggered. mask them now before 386 * acknowledging */ 387 if (stat & mailbox_intrs) 388 spu_int_mask_and(spu, 2, ~(stat & mailbox_intrs)); 389 /* acknowledge all interrupts before the callbacks */ 390 spu_int_stat_clear(spu, 2, stat); 391 spin_unlock(&spu->register_lock); 392 393 pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask); 394 395 if (stat & CLASS2_MAILBOX_INTR) 396 spu->ibox_callback(spu); 397 398 if (stat & CLASS2_SPU_STOP_INTR) 399 spu->stop_callback(spu); 400 401 if (stat & CLASS2_SPU_HALT_INTR) 402 spu->stop_callback(spu); 403 404 if (stat & CLASS2_SPU_DMA_TAG_GROUP_COMPLETE_INTR) 405 spu->mfc_callback(spu); 406 407 if (stat & CLASS2_MAILBOX_THRESHOLD_INTR) 408 spu->wbox_callback(spu); 409 410 spu->stats.class2_intr++; 411 return stat ? IRQ_HANDLED : IRQ_NONE; 412 } 413 414 static int spu_request_irqs(struct spu *spu) 415 { 416 int ret = 0; 417 418 if (spu->irqs[0] != NO_IRQ) { 419 snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0", 420 spu->number); 421 ret = request_irq(spu->irqs[0], spu_irq_class_0, 422 IRQF_DISABLED, 423 spu->irq_c0, spu); 424 if (ret) 425 goto bail0; 426 } 427 if (spu->irqs[1] != NO_IRQ) { 428 snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1", 429 spu->number); 430 ret = request_irq(spu->irqs[1], spu_irq_class_1, 431 IRQF_DISABLED, 432 spu->irq_c1, spu); 433 if (ret) 434 goto bail1; 435 } 436 if (spu->irqs[2] != NO_IRQ) { 437 snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2", 438 spu->number); 439 ret = request_irq(spu->irqs[2], spu_irq_class_2, 440 IRQF_DISABLED, 441 spu->irq_c2, spu); 442 if (ret) 443 goto bail2; 444 } 445 return 0; 446 447 bail2: 448 if (spu->irqs[1] != NO_IRQ) 449 free_irq(spu->irqs[1], spu); 450 bail1: 451 if (spu->irqs[0] != NO_IRQ) 452 free_irq(spu->irqs[0], spu); 453 bail0: 454 return ret; 455 } 456 457 static void spu_free_irqs(struct spu *spu) 458 { 459 if (spu->irqs[0] != NO_IRQ) 460 free_irq(spu->irqs[0], spu); 461 if (spu->irqs[1] != NO_IRQ) 462 free_irq(spu->irqs[1], spu); 463 if (spu->irqs[2] != NO_IRQ) 464 free_irq(spu->irqs[2], spu); 465 } 466 467 void spu_init_channels(struct spu *spu) 468 { 469 static const struct { 470 unsigned channel; 471 unsigned count; 472 } zero_list[] = { 473 { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, }, 474 { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, }, 475 }, count_list[] = { 476 { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, }, 477 { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, }, 478 { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, }, 479 }; 480 struct spu_priv2 __iomem *priv2; 481 int i; 482 483 priv2 = spu->priv2; 484 485 /* initialize all channel data to zero */ 486 for (i = 0; i < ARRAY_SIZE(zero_list); i++) { 487 int count; 488 489 out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel); 490 for (count = 0; count < zero_list[i].count; count++) 491 out_be64(&priv2->spu_chnldata_RW, 0); 492 } 493 494 /* initialize channel counts to meaningful values */ 495 for (i = 0; i < ARRAY_SIZE(count_list); i++) { 496 out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel); 497 out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count); 498 } 499 } 500 EXPORT_SYMBOL_GPL(spu_init_channels); 501 502 static int spu_shutdown(struct sys_device *sysdev) 503 { 504 struct spu *spu = container_of(sysdev, struct spu, sysdev); 505 506 spu_free_irqs(spu); 507 spu_destroy_spu(spu); 508 return 0; 509 } 510 511 static struct sysdev_class spu_sysdev_class = { 512 .name = "spu", 513 .shutdown = spu_shutdown, 514 }; 515 516 int spu_add_sysdev_attr(struct sysdev_attribute *attr) 517 { 518 struct spu *spu; 519 520 mutex_lock(&spu_full_list_mutex); 521 list_for_each_entry(spu, &spu_full_list, full_list) 522 sysdev_create_file(&spu->sysdev, attr); 523 mutex_unlock(&spu_full_list_mutex); 524 525 return 0; 526 } 527 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr); 528 529 int spu_add_sysdev_attr_group(struct attribute_group *attrs) 530 { 531 struct spu *spu; 532 int rc = 0; 533 534 mutex_lock(&spu_full_list_mutex); 535 list_for_each_entry(spu, &spu_full_list, full_list) { 536 rc = sysfs_create_group(&spu->sysdev.kobj, attrs); 537 538 /* we're in trouble here, but try unwinding anyway */ 539 if (rc) { 540 printk(KERN_ERR "%s: can't create sysfs group '%s'\n", 541 __func__, attrs->name); 542 543 list_for_each_entry_continue_reverse(spu, 544 &spu_full_list, full_list) 545 sysfs_remove_group(&spu->sysdev.kobj, attrs); 546 break; 547 } 548 } 549 550 mutex_unlock(&spu_full_list_mutex); 551 552 return rc; 553 } 554 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr_group); 555 556 557 void spu_remove_sysdev_attr(struct sysdev_attribute *attr) 558 { 559 struct spu *spu; 560 561 mutex_lock(&spu_full_list_mutex); 562 list_for_each_entry(spu, &spu_full_list, full_list) 563 sysdev_remove_file(&spu->sysdev, attr); 564 mutex_unlock(&spu_full_list_mutex); 565 } 566 EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr); 567 568 void spu_remove_sysdev_attr_group(struct attribute_group *attrs) 569 { 570 struct spu *spu; 571 572 mutex_lock(&spu_full_list_mutex); 573 list_for_each_entry(spu, &spu_full_list, full_list) 574 sysfs_remove_group(&spu->sysdev.kobj, attrs); 575 mutex_unlock(&spu_full_list_mutex); 576 } 577 EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr_group); 578 579 static int spu_create_sysdev(struct spu *spu) 580 { 581 int ret; 582 583 spu->sysdev.id = spu->number; 584 spu->sysdev.cls = &spu_sysdev_class; 585 ret = sysdev_register(&spu->sysdev); 586 if (ret) { 587 printk(KERN_ERR "Can't register SPU %d with sysfs\n", 588 spu->number); 589 return ret; 590 } 591 592 sysfs_add_device_to_node(&spu->sysdev, spu->node); 593 594 return 0; 595 } 596 597 static int __init create_spu(void *data) 598 { 599 struct spu *spu; 600 int ret; 601 static int number; 602 unsigned long flags; 603 struct timespec ts; 604 605 ret = -ENOMEM; 606 spu = kzalloc(sizeof (*spu), GFP_KERNEL); 607 if (!spu) 608 goto out; 609 610 spu->alloc_state = SPU_FREE; 611 612 spin_lock_init(&spu->register_lock); 613 spin_lock(&spu_lock); 614 spu->number = number++; 615 spin_unlock(&spu_lock); 616 617 ret = spu_create_spu(spu, data); 618 619 if (ret) 620 goto out_free; 621 622 spu_mfc_sdr_setup(spu); 623 spu_mfc_sr1_set(spu, 0x33); 624 ret = spu_request_irqs(spu); 625 if (ret) 626 goto out_destroy; 627 628 ret = spu_create_sysdev(spu); 629 if (ret) 630 goto out_free_irqs; 631 632 mutex_lock(&cbe_spu_info[spu->node].list_mutex); 633 list_add(&spu->cbe_list, &cbe_spu_info[spu->node].spus); 634 cbe_spu_info[spu->node].n_spus++; 635 mutex_unlock(&cbe_spu_info[spu->node].list_mutex); 636 637 mutex_lock(&spu_full_list_mutex); 638 spin_lock_irqsave(&spu_full_list_lock, flags); 639 list_add(&spu->full_list, &spu_full_list); 640 spin_unlock_irqrestore(&spu_full_list_lock, flags); 641 mutex_unlock(&spu_full_list_mutex); 642 643 spu->stats.util_state = SPU_UTIL_IDLE_LOADED; 644 ktime_get_ts(&ts); 645 spu->stats.tstamp = timespec_to_ns(&ts); 646 647 INIT_LIST_HEAD(&spu->aff_list); 648 649 goto out; 650 651 out_free_irqs: 652 spu_free_irqs(spu); 653 out_destroy: 654 spu_destroy_spu(spu); 655 out_free: 656 kfree(spu); 657 out: 658 return ret; 659 } 660 661 static const char *spu_state_names[] = { 662 "user", "system", "iowait", "idle" 663 }; 664 665 static unsigned long long spu_acct_time(struct spu *spu, 666 enum spu_utilization_state state) 667 { 668 struct timespec ts; 669 unsigned long long time = spu->stats.times[state]; 670 671 /* 672 * If the spu is idle or the context is stopped, utilization 673 * statistics are not updated. Apply the time delta from the 674 * last recorded state of the spu. 675 */ 676 if (spu->stats.util_state == state) { 677 ktime_get_ts(&ts); 678 time += timespec_to_ns(&ts) - spu->stats.tstamp; 679 } 680 681 return time / NSEC_PER_MSEC; 682 } 683 684 685 static ssize_t spu_stat_show(struct sys_device *sysdev, char *buf) 686 { 687 struct spu *spu = container_of(sysdev, struct spu, sysdev); 688 689 return sprintf(buf, "%s %llu %llu %llu %llu " 690 "%llu %llu %llu %llu %llu %llu %llu %llu\n", 691 spu_state_names[spu->stats.util_state], 692 spu_acct_time(spu, SPU_UTIL_USER), 693 spu_acct_time(spu, SPU_UTIL_SYSTEM), 694 spu_acct_time(spu, SPU_UTIL_IOWAIT), 695 spu_acct_time(spu, SPU_UTIL_IDLE_LOADED), 696 spu->stats.vol_ctx_switch, 697 spu->stats.invol_ctx_switch, 698 spu->stats.slb_flt, 699 spu->stats.hash_flt, 700 spu->stats.min_flt, 701 spu->stats.maj_flt, 702 spu->stats.class2_intr, 703 spu->stats.libassist); 704 } 705 706 static SYSDEV_ATTR(stat, 0644, spu_stat_show, NULL); 707 708 static int __init init_spu_base(void) 709 { 710 int i, ret = 0; 711 712 for (i = 0; i < MAX_NUMNODES; i++) { 713 mutex_init(&cbe_spu_info[i].list_mutex); 714 INIT_LIST_HEAD(&cbe_spu_info[i].spus); 715 } 716 717 if (!spu_management_ops) 718 goto out; 719 720 /* create sysdev class for spus */ 721 ret = sysdev_class_register(&spu_sysdev_class); 722 if (ret) 723 goto out; 724 725 ret = spu_enumerate_spus(create_spu); 726 727 if (ret < 0) { 728 printk(KERN_WARNING "%s: Error initializing spus\n", 729 __FUNCTION__); 730 goto out_unregister_sysdev_class; 731 } 732 733 if (ret > 0) { 734 /* 735 * We cannot put the forward declaration in 736 * <linux/linux_logo.h> because of conflicting session type 737 * conflicts for const and __initdata with different compiler 738 * versions 739 */ 740 extern const struct linux_logo logo_spe_clut224; 741 742 fb_append_extra_logo(&logo_spe_clut224, ret); 743 } 744 745 mutex_lock(&spu_full_list_mutex); 746 xmon_register_spus(&spu_full_list); 747 crash_register_spus(&spu_full_list); 748 mutex_unlock(&spu_full_list_mutex); 749 spu_add_sysdev_attr(&attr_stat); 750 751 spu_init_affinity(); 752 753 return 0; 754 755 out_unregister_sysdev_class: 756 sysdev_class_unregister(&spu_sysdev_class); 757 out: 758 return ret; 759 } 760 module_init(init_spu_base); 761 762 MODULE_LICENSE("GPL"); 763 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 764