1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * PS3 device registration routines. 4 * 5 * Copyright (C) 2007 Sony Computer Entertainment Inc. 6 * Copyright 2007 Sony Corp. 7 */ 8 9#include <linux/delay.h> 10#include <linux/freezer.h> 11#include <linux/kernel.h> 12#include <linux/kthread.h> 13#include <linux/init.h> 14#include <linux/slab.h> 15#include <linux/reboot.h> 16#include <linux/rcuwait.h> 17 18#include <asm/firmware.h> 19#include <asm/lv1call.h> 20#include <asm/ps3stor.h> 21 22#include "platform.h" 23 24static int __init ps3_register_lpm_devices(void) 25{ 26 int result; 27 u64 tmp1; 28 u64 tmp2; 29 struct ps3_system_bus_device *dev; 30 31 pr_debug(" -> %s:%d\n", __func__, __LINE__); 32 33 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 34 if (!dev) 35 return -ENOMEM; 36 37 dev->match_id = PS3_MATCH_ID_LPM; 38 dev->dev_type = PS3_DEVICE_TYPE_LPM; 39 40 /* The current lpm driver only supports a single BE processor. */ 41 42 result = ps3_repository_read_be_node_id(0, &dev->lpm.node_id); 43 44 if (result) { 45 pr_debug("%s:%d: ps3_repository_read_be_node_id failed \n", 46 __func__, __LINE__); 47 goto fail_read_repo; 48 } 49 50 result = ps3_repository_read_lpm_privileges(dev->lpm.node_id, &tmp1, 51 &dev->lpm.rights); 52 53 if (result) { 54 pr_debug("%s:%d: ps3_repository_read_lpm_privileges failed\n", 55 __func__, __LINE__); 56 goto fail_read_repo; 57 } 58 59 lv1_get_logical_partition_id(&tmp2); 60 61 if (tmp1 != tmp2) { 62 pr_debug("%s:%d: wrong lpar\n", 63 __func__, __LINE__); 64 result = -ENODEV; 65 goto fail_rights; 66 } 67 68 if (!(dev->lpm.rights & PS3_LPM_RIGHTS_USE_LPM)) { 69 pr_debug("%s:%d: don't have rights to use lpm\n", 70 __func__, __LINE__); 71 result = -EPERM; 72 goto fail_rights; 73 } 74 75 pr_debug("%s:%d: pu_id %llu, rights %llu(%llxh)\n", 76 __func__, __LINE__, dev->lpm.pu_id, dev->lpm.rights, 77 dev->lpm.rights); 78 79 result = ps3_repository_read_pu_id(0, &dev->lpm.pu_id); 80 81 if (result) { 82 pr_debug("%s:%d: ps3_repository_read_pu_id failed \n", 83 __func__, __LINE__); 84 goto fail_read_repo; 85 } 86 87 result = ps3_system_bus_device_register(dev); 88 89 if (result) { 90 pr_debug("%s:%d ps3_system_bus_device_register failed\n", 91 __func__, __LINE__); 92 goto fail_register; 93 } 94 95 pr_debug(" <- %s:%d\n", __func__, __LINE__); 96 return 0; 97 98 99fail_register: 100fail_rights: 101fail_read_repo: 102 kfree(dev); 103 pr_debug(" <- %s:%d: failed\n", __func__, __LINE__); 104 return result; 105} 106 107/** 108 * ps3_setup_gelic_device - Setup and register a gelic device instance. 109 * 110 * Allocates memory for a struct ps3_system_bus_device instance, initialises the 111 * structure members, and registers the device instance with the system bus. 112 */ 113 114static int __init ps3_setup_gelic_device( 115 const struct ps3_repository_device *repo) 116{ 117 int result; 118 struct layout { 119 struct ps3_system_bus_device dev; 120 struct ps3_dma_region d_region; 121 } *p; 122 123 pr_debug(" -> %s:%d\n", __func__, __LINE__); 124 125 BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB); 126 BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC); 127 128 p = kzalloc(sizeof(struct layout), GFP_KERNEL); 129 130 if (!p) { 131 result = -ENOMEM; 132 goto fail_malloc; 133 } 134 135 p->dev.match_id = PS3_MATCH_ID_GELIC; 136 p->dev.dev_type = PS3_DEVICE_TYPE_SB; 137 p->dev.bus_id = repo->bus_id; 138 p->dev.dev_id = repo->dev_id; 139 p->dev.d_region = &p->d_region; 140 141 result = ps3_repository_find_interrupt(repo, 142 PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id); 143 144 if (result) { 145 pr_debug("%s:%d ps3_repository_find_interrupt failed\n", 146 __func__, __LINE__); 147 goto fail_find_interrupt; 148 } 149 150 BUG_ON(p->dev.interrupt_id != 0); 151 152 result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K, 153 PS3_DMA_OTHER, NULL, 0); 154 155 if (result) { 156 pr_debug("%s:%d ps3_dma_region_init failed\n", 157 __func__, __LINE__); 158 goto fail_dma_init; 159 } 160 161 result = ps3_system_bus_device_register(&p->dev); 162 163 if (result) { 164 pr_debug("%s:%d ps3_system_bus_device_register failed\n", 165 __func__, __LINE__); 166 goto fail_device_register; 167 } 168 169 pr_debug(" <- %s:%d\n", __func__, __LINE__); 170 return result; 171 172fail_device_register: 173fail_dma_init: 174fail_find_interrupt: 175 kfree(p); 176fail_malloc: 177 pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__); 178 return result; 179} 180 181static int __ref ps3_setup_uhc_device( 182 const struct ps3_repository_device *repo, enum ps3_match_id match_id, 183 enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type) 184{ 185 int result; 186 struct layout { 187 struct ps3_system_bus_device dev; 188 struct ps3_dma_region d_region; 189 struct ps3_mmio_region m_region; 190 } *p; 191 u64 bus_addr; 192 u64 len; 193 194 pr_debug(" -> %s:%d\n", __func__, __LINE__); 195 196 BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB); 197 BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB); 198 199 p = kzalloc(sizeof(struct layout), GFP_KERNEL); 200 201 if (!p) { 202 result = -ENOMEM; 203 goto fail_malloc; 204 } 205 206 p->dev.match_id = match_id; 207 p->dev.dev_type = PS3_DEVICE_TYPE_SB; 208 p->dev.bus_id = repo->bus_id; 209 p->dev.dev_id = repo->dev_id; 210 p->dev.d_region = &p->d_region; 211 p->dev.m_region = &p->m_region; 212 213 result = ps3_repository_find_interrupt(repo, 214 interrupt_type, &p->dev.interrupt_id); 215 216 if (result) { 217 pr_debug("%s:%d ps3_repository_find_interrupt failed\n", 218 __func__, __LINE__); 219 goto fail_find_interrupt; 220 } 221 222 result = ps3_repository_find_reg(repo, reg_type, 223 &bus_addr, &len); 224 225 if (result) { 226 pr_debug("%s:%d ps3_repository_find_reg failed\n", 227 __func__, __LINE__); 228 goto fail_find_reg; 229 } 230 231 result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K, 232 PS3_DMA_INTERNAL, NULL, 0); 233 234 if (result) { 235 pr_debug("%s:%d ps3_dma_region_init failed\n", 236 __func__, __LINE__); 237 goto fail_dma_init; 238 } 239 240 result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len, 241 PS3_MMIO_4K); 242 243 if (result) { 244 pr_debug("%s:%d ps3_mmio_region_init failed\n", 245 __func__, __LINE__); 246 goto fail_mmio_init; 247 } 248 249 result = ps3_system_bus_device_register(&p->dev); 250 251 if (result) { 252 pr_debug("%s:%d ps3_system_bus_device_register failed\n", 253 __func__, __LINE__); 254 goto fail_device_register; 255 } 256 257 pr_debug(" <- %s:%d\n", __func__, __LINE__); 258 return result; 259 260fail_device_register: 261fail_mmio_init: 262fail_dma_init: 263fail_find_reg: 264fail_find_interrupt: 265 kfree(p); 266fail_malloc: 267 pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__); 268 return result; 269} 270 271static int __init ps3_setup_ehci_device( 272 const struct ps3_repository_device *repo) 273{ 274 return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI, 275 PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI); 276} 277 278static int __init ps3_setup_ohci_device( 279 const struct ps3_repository_device *repo) 280{ 281 return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI, 282 PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI); 283} 284 285static int __init ps3_setup_vuart_device(enum ps3_match_id match_id, 286 unsigned int port_number) 287{ 288 int result; 289 struct layout { 290 struct ps3_system_bus_device dev; 291 } *p; 292 293 pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__, 294 match_id, port_number); 295 296 p = kzalloc(sizeof(struct layout), GFP_KERNEL); 297 298 if (!p) 299 return -ENOMEM; 300 301 p->dev.match_id = match_id; 302 p->dev.dev_type = PS3_DEVICE_TYPE_VUART; 303 p->dev.port_number = port_number; 304 305 result = ps3_system_bus_device_register(&p->dev); 306 307 if (result) { 308 pr_debug("%s:%d ps3_system_bus_device_register failed\n", 309 __func__, __LINE__); 310 goto fail_device_register; 311 } 312 pr_debug(" <- %s:%d\n", __func__, __LINE__); 313 return 0; 314 315fail_device_register: 316 kfree(p); 317 pr_debug(" <- %s:%d fail\n", __func__, __LINE__); 318 return result; 319} 320 321static int ps3_setup_storage_dev(const struct ps3_repository_device *repo, 322 enum ps3_match_id match_id) 323{ 324 int result; 325 struct ps3_storage_device *p; 326 u64 port, blk_size, num_blocks; 327 unsigned int num_regions, i; 328 329 pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id); 330 331 result = ps3_repository_read_stor_dev_info(repo->bus_index, 332 repo->dev_index, &port, 333 &blk_size, &num_blocks, 334 &num_regions); 335 if (result) { 336 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n", 337 __func__, __LINE__, result); 338 return -ENODEV; 339 } 340 341 pr_debug("%s:%u: (%u:%u:%u): port %llu blk_size %llu num_blocks %llu " 342 "num_regions %u\n", __func__, __LINE__, repo->bus_index, 343 repo->dev_index, repo->dev_type, port, blk_size, num_blocks, 344 num_regions); 345 346 p = kzalloc(struct_size(p, regions, num_regions), GFP_KERNEL); 347 if (!p) { 348 result = -ENOMEM; 349 goto fail_malloc; 350 } 351 352 p->sbd.match_id = match_id; 353 p->sbd.dev_type = PS3_DEVICE_TYPE_SB; 354 p->sbd.bus_id = repo->bus_id; 355 p->sbd.dev_id = repo->dev_id; 356 p->sbd.d_region = &p->dma_region; 357 p->blk_size = blk_size; 358 p->num_regions = num_regions; 359 360 result = ps3_repository_find_interrupt(repo, 361 PS3_INTERRUPT_TYPE_EVENT_PORT, 362 &p->sbd.interrupt_id); 363 if (result) { 364 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__, 365 __LINE__, result); 366 result = -ENODEV; 367 goto fail_find_interrupt; 368 } 369 370 for (i = 0; i < num_regions; i++) { 371 unsigned int id; 372 u64 start, size; 373 374 result = ps3_repository_read_stor_dev_region(repo->bus_index, 375 repo->dev_index, 376 i, &id, &start, 377 &size); 378 if (result) { 379 printk(KERN_ERR 380 "%s:%u: read_stor_dev_region failed %d\n", 381 __func__, __LINE__, result); 382 result = -ENODEV; 383 goto fail_read_region; 384 } 385 pr_debug("%s:%u: region %u: id %u start %llu size %llu\n", 386 __func__, __LINE__, i, id, start, size); 387 388 p->regions[i].id = id; 389 p->regions[i].start = start; 390 p->regions[i].size = size; 391 } 392 393 result = ps3_system_bus_device_register(&p->sbd); 394 if (result) { 395 pr_debug("%s:%u ps3_system_bus_device_register failed\n", 396 __func__, __LINE__); 397 goto fail_device_register; 398 } 399 400 pr_debug(" <- %s:%u\n", __func__, __LINE__); 401 return 0; 402 403fail_device_register: 404fail_read_region: 405fail_find_interrupt: 406 kfree(p); 407fail_malloc: 408 pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__); 409 return result; 410} 411 412static int __init ps3_register_vuart_devices(void) 413{ 414 int result; 415 unsigned int port_number; 416 417 pr_debug(" -> %s:%d\n", __func__, __LINE__); 418 419 result = ps3_repository_read_vuart_av_port(&port_number); 420 if (result) 421 port_number = 0; /* av default */ 422 423 result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number); 424 WARN_ON(result); 425 426 result = ps3_repository_read_vuart_sysmgr_port(&port_number); 427 if (result) 428 port_number = 2; /* sysmgr default */ 429 430 result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER, 431 port_number); 432 WARN_ON(result); 433 434 pr_debug(" <- %s:%d\n", __func__, __LINE__); 435 return result; 436} 437 438static int __init ps3_register_sound_devices(void) 439{ 440 int result; 441 struct layout { 442 struct ps3_system_bus_device dev; 443 struct ps3_dma_region d_region; 444 struct ps3_mmio_region m_region; 445 } *p; 446 447 pr_debug(" -> %s:%d\n", __func__, __LINE__); 448 449 p = kzalloc(sizeof(*p), GFP_KERNEL); 450 if (!p) 451 return -ENOMEM; 452 453 p->dev.match_id = PS3_MATCH_ID_SOUND; 454 p->dev.dev_type = PS3_DEVICE_TYPE_IOC0; 455 p->dev.d_region = &p->d_region; 456 p->dev.m_region = &p->m_region; 457 458 result = ps3_system_bus_device_register(&p->dev); 459 460 if (result) { 461 pr_debug("%s:%d ps3_system_bus_device_register failed\n", 462 __func__, __LINE__); 463 goto fail_device_register; 464 } 465 pr_debug(" <- %s:%d\n", __func__, __LINE__); 466 return 0; 467 468fail_device_register: 469 kfree(p); 470 pr_debug(" <- %s:%d failed\n", __func__, __LINE__); 471 return result; 472} 473 474static int __init ps3_register_graphics_devices(void) 475{ 476 int result; 477 struct layout { 478 struct ps3_system_bus_device dev; 479 } *p; 480 481 pr_debug(" -> %s:%d\n", __func__, __LINE__); 482 483 p = kzalloc(sizeof(struct layout), GFP_KERNEL); 484 485 if (!p) 486 return -ENOMEM; 487 488 p->dev.match_id = PS3_MATCH_ID_GPU; 489 p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_FB; 490 p->dev.dev_type = PS3_DEVICE_TYPE_IOC0; 491 492 result = ps3_system_bus_device_register(&p->dev); 493 494 if (result) { 495 pr_debug("%s:%d ps3_system_bus_device_register failed\n", 496 __func__, __LINE__); 497 goto fail_device_register; 498 } 499 500 pr_debug(" <- %s:%d\n", __func__, __LINE__); 501 return 0; 502 503fail_device_register: 504 kfree(p); 505 pr_debug(" <- %s:%d failed\n", __func__, __LINE__); 506 return result; 507} 508 509static int __init ps3_register_ramdisk_device(void) 510{ 511 int result; 512 struct layout { 513 struct ps3_system_bus_device dev; 514 } *p; 515 516 pr_debug(" -> %s:%d\n", __func__, __LINE__); 517 518 p = kzalloc(sizeof(struct layout), GFP_KERNEL); 519 520 if (!p) 521 return -ENOMEM; 522 523 p->dev.match_id = PS3_MATCH_ID_GPU; 524 p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK; 525 p->dev.dev_type = PS3_DEVICE_TYPE_IOC0; 526 527 result = ps3_system_bus_device_register(&p->dev); 528 529 if (result) { 530 pr_debug("%s:%d ps3_system_bus_device_register failed\n", 531 __func__, __LINE__); 532 goto fail_device_register; 533 } 534 535 pr_debug(" <- %s:%d\n", __func__, __LINE__); 536 return 0; 537 538fail_device_register: 539 kfree(p); 540 pr_debug(" <- %s:%d failed\n", __func__, __LINE__); 541 return result; 542} 543 544/** 545 * ps3_setup_dynamic_device - Setup a dynamic device from the repository 546 */ 547 548static int ps3_setup_dynamic_device(const struct ps3_repository_device *repo) 549{ 550 int result; 551 552 switch (repo->dev_type) { 553 case PS3_DEV_TYPE_STOR_DISK: 554 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK); 555 556 /* Some devices are not accessible from the Other OS lpar. */ 557 if (result == -ENODEV) { 558 result = 0; 559 pr_debug("%s:%u: not accessible\n", __func__, 560 __LINE__); 561 } 562 563 if (result) 564 pr_debug("%s:%u ps3_setup_storage_dev failed\n", 565 __func__, __LINE__); 566 break; 567 568 case PS3_DEV_TYPE_STOR_ROM: 569 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM); 570 if (result) 571 pr_debug("%s:%u ps3_setup_storage_dev failed\n", 572 __func__, __LINE__); 573 break; 574 575 case PS3_DEV_TYPE_STOR_FLASH: 576 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH); 577 if (result) 578 pr_debug("%s:%u ps3_setup_storage_dev failed\n", 579 __func__, __LINE__); 580 break; 581 582 default: 583 result = 0; 584 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__, 585 repo->dev_type); 586 } 587 588 return result; 589} 590 591/** 592 * ps3_setup_static_device - Setup a static device from the repository 593 */ 594 595static int __init ps3_setup_static_device(const struct ps3_repository_device *repo) 596{ 597 int result; 598 599 switch (repo->dev_type) { 600 case PS3_DEV_TYPE_SB_GELIC: 601 result = ps3_setup_gelic_device(repo); 602 if (result) { 603 pr_debug("%s:%d ps3_setup_gelic_device failed\n", 604 __func__, __LINE__); 605 } 606 break; 607 case PS3_DEV_TYPE_SB_USB: 608 609 /* Each USB device has both an EHCI and an OHCI HC */ 610 611 result = ps3_setup_ehci_device(repo); 612 613 if (result) { 614 pr_debug("%s:%d ps3_setup_ehci_device failed\n", 615 __func__, __LINE__); 616 } 617 618 result = ps3_setup_ohci_device(repo); 619 620 if (result) { 621 pr_debug("%s:%d ps3_setup_ohci_device failed\n", 622 __func__, __LINE__); 623 } 624 break; 625 626 default: 627 return ps3_setup_dynamic_device(repo); 628 } 629 630 return result; 631} 632 633static void ps3_find_and_add_device(u64 bus_id, u64 dev_id) 634{ 635 struct ps3_repository_device repo; 636 int res; 637 unsigned int retries; 638 unsigned long rem; 639 640 /* 641 * On some firmware versions (e.g. 1.90), the device may not show up 642 * in the repository immediately 643 */ 644 for (retries = 0; retries < 10; retries++) { 645 res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id); 646 if (!res) 647 goto found; 648 649 rem = msleep_interruptible(100); 650 if (rem) 651 break; 652 } 653 pr_warn("%s:%u: device %llu:%llu not found\n", 654 __func__, __LINE__, bus_id, dev_id); 655 return; 656 657found: 658 if (retries) 659 pr_debug("%s:%u: device %llu:%llu found after %u retries\n", 660 __func__, __LINE__, bus_id, dev_id, retries); 661 662 ps3_setup_dynamic_device(&repo); 663 return; 664} 665 666#define PS3_NOTIFICATION_DEV_ID ULONG_MAX 667#define PS3_NOTIFICATION_INTERRUPT_ID 0 668 669struct ps3_notification_device { 670 struct ps3_system_bus_device sbd; 671 spinlock_t lock; 672 u64 tag; 673 u64 lv1_status; 674 struct rcuwait wait; 675 bool done; 676}; 677 678enum ps3_notify_type { 679 notify_device_ready = 0, 680 notify_region_probe = 1, 681 notify_region_update = 2, 682}; 683 684struct ps3_notify_cmd { 685 u64 operation_code; /* must be zero */ 686 u64 event_mask; /* OR of 1UL << enum ps3_notify_type */ 687}; 688 689struct ps3_notify_event { 690 u64 event_type; /* enum ps3_notify_type */ 691 u64 bus_id; 692 u64 dev_id; 693 u64 dev_type; 694 u64 dev_port; 695}; 696 697static irqreturn_t ps3_notification_interrupt(int irq, void *data) 698{ 699 struct ps3_notification_device *dev = data; 700 int res; 701 u64 tag, status; 702 703 spin_lock(&dev->lock); 704 res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag, 705 &status); 706 if (tag != dev->tag) 707 pr_err("%s:%u: tag mismatch, got %llx, expected %llx\n", 708 __func__, __LINE__, tag, dev->tag); 709 710 if (res) { 711 pr_err("%s:%u: res %d status 0x%llx\n", __func__, __LINE__, res, 712 status); 713 } else { 714 pr_debug("%s:%u: completed, status 0x%llx\n", __func__, 715 __LINE__, status); 716 dev->lv1_status = status; 717 dev->done = true; 718 rcuwait_wake_up(&dev->wait); 719 } 720 spin_unlock(&dev->lock); 721 return IRQ_HANDLED; 722} 723 724static int ps3_notification_read_write(struct ps3_notification_device *dev, 725 u64 lpar, int write) 726{ 727 const char *op = write ? "write" : "read"; 728 unsigned long flags; 729 int res; 730 731 spin_lock_irqsave(&dev->lock, flags); 732 res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar, 733 &dev->tag) 734 : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar, 735 &dev->tag); 736 dev->done = false; 737 spin_unlock_irqrestore(&dev->lock, flags); 738 if (res) { 739 pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res); 740 return -EPERM; 741 } 742 pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op); 743 744 rcuwait_wait_event(&dev->wait, dev->done || kthread_should_stop(), TASK_IDLE); 745 746 if (kthread_should_stop()) 747 res = -EINTR; 748 749 if (dev->lv1_status) { 750 pr_err("%s:%u: %s not completed, status 0x%llx\n", __func__, 751 __LINE__, op, dev->lv1_status); 752 return -EIO; 753 } 754 pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op); 755 756 return 0; 757} 758 759static struct task_struct *probe_task; 760 761/** 762 * ps3_probe_thread - Background repository probing at system startup. 763 * 764 * This implementation only supports background probing on a single bus. 765 * It uses the hypervisor's storage device notification mechanism to wait until 766 * a storage device is ready. The device notification mechanism uses a 767 * pseudo device to asynchronously notify the guest when storage devices become 768 * ready. The notification device has a block size of 512 bytes. 769 */ 770 771static int ps3_probe_thread(void *data) 772{ 773 struct ps3_notification_device dev; 774 int res; 775 unsigned int irq; 776 u64 lpar; 777 void *buf; 778 struct ps3_notify_cmd *notify_cmd; 779 struct ps3_notify_event *notify_event; 780 781 pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__); 782 783 buf = kzalloc(512, GFP_KERNEL); 784 if (!buf) 785 return -ENOMEM; 786 787 lpar = ps3_mm_phys_to_lpar(__pa(buf)); 788 notify_cmd = buf; 789 notify_event = buf; 790 791 /* dummy system bus device */ 792 dev.sbd.bus_id = (u64)data; 793 dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID; 794 dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID; 795 796 res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0); 797 if (res) { 798 pr_err("%s:%u: lv1_open_device failed %s\n", __func__, 799 __LINE__, ps3_result(res)); 800 goto fail_free; 801 } 802 803 res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY, 804 &irq); 805 if (res) { 806 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n", 807 __func__, __LINE__, res); 808 goto fail_close_device; 809 } 810 811 spin_lock_init(&dev.lock); 812 rcuwait_init(&dev.wait); 813 814 res = request_irq(irq, ps3_notification_interrupt, 0, 815 "ps3_notification", &dev); 816 if (res) { 817 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__, 818 res); 819 goto fail_sb_event_receive_port_destroy; 820 } 821 822 /* Setup and write the request for device notification. */ 823 notify_cmd->operation_code = 0; /* must be zero */ 824 notify_cmd->event_mask = 1UL << notify_region_probe; 825 826 res = ps3_notification_read_write(&dev, lpar, 1); 827 if (res) 828 goto fail_free_irq; 829 830 set_freezable(); 831 /* Loop here processing the requested notification events. */ 832 do { 833 try_to_freeze(); 834 835 memset(notify_event, 0, sizeof(*notify_event)); 836 837 res = ps3_notification_read_write(&dev, lpar, 0); 838 if (res) 839 break; 840 841 pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu" 842 " type %llu port %llu\n", __func__, __LINE__, 843 notify_event->event_type, notify_event->bus_id, 844 notify_event->dev_id, notify_event->dev_type, 845 notify_event->dev_port); 846 847 if (notify_event->event_type != notify_region_probe || 848 notify_event->bus_id != dev.sbd.bus_id) { 849 pr_warn("%s:%u: bad notify_event: event %llu, dev_id %llu, dev_type %llu\n", 850 __func__, __LINE__, notify_event->event_type, 851 notify_event->dev_id, notify_event->dev_type); 852 continue; 853 } 854 855 ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id); 856 857 } while (!kthread_should_stop()); 858 859fail_free_irq: 860 free_irq(irq, &dev); 861fail_sb_event_receive_port_destroy: 862 ps3_sb_event_receive_port_destroy(&dev.sbd, irq); 863fail_close_device: 864 lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id); 865fail_free: 866 kfree(buf); 867 868 probe_task = NULL; 869 870 pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__); 871 872 return 0; 873} 874 875/** 876 * ps3_stop_probe_thread - Stops the background probe thread. 877 * 878 */ 879 880static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code, 881 void *data) 882{ 883 if (probe_task) 884 kthread_stop(probe_task); 885 return 0; 886} 887 888static struct notifier_block nb = { 889 .notifier_call = ps3_stop_probe_thread 890}; 891 892/** 893 * ps3_start_probe_thread - Starts the background probe thread. 894 * 895 */ 896 897static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type) 898{ 899 int result; 900 struct task_struct *task; 901 struct ps3_repository_device repo; 902 903 pr_debug(" -> %s:%d\n", __func__, __LINE__); 904 905 memset(&repo, 0, sizeof(repo)); 906 907 repo.bus_type = bus_type; 908 909 result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index); 910 911 if (result) { 912 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result); 913 return -ENODEV; 914 } 915 916 result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id); 917 918 if (result) { 919 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__, 920 result); 921 return -ENODEV; 922 } 923 924 task = kthread_run(ps3_probe_thread, (void *)repo.bus_id, 925 "ps3-probe-%u", bus_type); 926 927 if (IS_ERR(task)) { 928 result = PTR_ERR(task); 929 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__, 930 result); 931 return result; 932 } 933 934 probe_task = task; 935 register_reboot_notifier(&nb); 936 937 pr_debug(" <- %s:%d\n", __func__, __LINE__); 938 return 0; 939} 940 941/** 942 * ps3_register_devices - Probe the system and register devices found. 943 * 944 * A device_initcall() routine. 945 */ 946 947static int __init ps3_register_devices(void) 948{ 949 int result; 950 951 if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) 952 return -ENODEV; 953 954 pr_debug(" -> %s:%d\n", __func__, __LINE__); 955 956 /* ps3_repository_dump_bus_info(); */ 957 958 result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE); 959 960 ps3_register_vuart_devices(); 961 962 ps3_register_graphics_devices(); 963 964 ps3_repository_find_devices(PS3_BUS_TYPE_SB, ps3_setup_static_device); 965 966 ps3_register_sound_devices(); 967 968 ps3_register_lpm_devices(); 969 970 ps3_register_ramdisk_device(); 971 972 pr_debug(" <- %s:%d\n", __func__, __LINE__); 973 return 0; 974} 975 976device_initcall(ps3_register_devices); 977