arch/powerpc/platforms/ps3/device-init.c

   1 /*
   2  *  PS3 device registration routines.
   3  *
   4  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   5  *  Copyright 2007 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/delay.h>
  22 #include <linux/freezer.h>
  23 #include <linux/kernel.h>
  24 #include <linux/kthread.h>
  25 #include <linux/init.h>
  26 #include <linux/reboot.h>
  27
  28 #include <asm/firmware.h>
  29 #include <asm/lv1call.h>
  30 #include <asm/ps3stor.h>
  31
  32 #include "platform.h"
  33
  34 static int __init ps3_register_lpm_devices(void)
  35 {
  36         int result;
  37         u64 tmp1;
  38         u64 tmp2;
  39         struct ps3_system_bus_device *dev;
  40
  41         pr_debug(" -> %s:%d\n", __func__, __LINE__);
  42
  43         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
  44         if (!dev)
  45                 return -ENOMEM;
  46
  47         dev->match_id = PS3_MATCH_ID_LPM;
  48         dev->dev_type = PS3_DEVICE_TYPE_LPM;
  49
  50         /* The current lpm driver only supports a single BE processor. */
  51
  52         result = ps3_repository_read_be_node_id(0, &dev->lpm.node_id);
  53
  54         if (result) {
  55                 pr_debug("%s:%d: ps3_repository_read_be_node_id failed \n",
  56                         __func__, __LINE__);
  57                 goto fail_read_repo;
  58         }
  59
  60         result = ps3_repository_read_lpm_privileges(dev->lpm.node_id, &tmp1,
  61                 &dev->lpm.rights);
  62
  63         if (result) {
  64                 pr_debug("%s:%d: ps3_repository_read_lpm_privleges failed \n",
  65                         __func__, __LINE__);
  66                 goto fail_read_repo;
  67         }
  68
  69         lv1_get_logical_partition_id(&tmp2);
  70
  71         if (tmp1 != tmp2) {
  72                 pr_debug("%s:%d: wrong lpar\n",
  73                         __func__, __LINE__);
  74                 result = -ENODEV;
  75                 goto fail_rights;
  76         }
  77
  78         if (!(dev->lpm.rights & PS3_LPM_RIGHTS_USE_LPM)) {
  79                 pr_debug("%s:%d: don't have rights to use lpm\n",
  80                         __func__, __LINE__);
  81                 result = -EPERM;
  82                 goto fail_rights;
  83         }
  84
  85         pr_debug("%s:%d: pu_id %lu, rights %lu(%lxh)\n",
  86                 __func__, __LINE__, dev->lpm.pu_id, dev->lpm.rights,
  87                 dev->lpm.rights);
  88
  89         result = ps3_repository_read_pu_id(0, &dev->lpm.pu_id);
  90
  91         if (result) {
  92                 pr_debug("%s:%d: ps3_repository_read_pu_id failed \n",
  93                         __func__, __LINE__);
  94                 goto fail_read_repo;
  95         }
  96
  97         result = ps3_system_bus_device_register(dev);
  98
  99         if (result) {
 100                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 101                         __func__, __LINE__);
 102                 goto fail_register;
 103         }
 104
 105         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 106         return 0;
 107
 108
 109 fail_register:
 110 fail_rights:
 111 fail_read_repo:
 112         kfree(dev);
 113         pr_debug(" <- %s:%d: failed\n", __func__, __LINE__);
 114         return result;
 115 }
 116
 117 /**
 118  * ps3_setup_gelic_device - Setup and register a gelic device instance.
 119  *
 120  * Allocates memory for a struct ps3_system_bus_device instance, initialises the
 121  * structure members, and registers the device instance with the system bus.
 122  */
 123
 124 static int __init ps3_setup_gelic_device(
 125         const struct ps3_repository_device *repo)
 126 {
 127         int result;
 128         struct layout {
 129                 struct ps3_system_bus_device dev;
 130                 struct ps3_dma_region d_region;
 131         } *p;
 132
 133         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 134
 135         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
 136         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
 137
 138         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 139
 140         if (!p) {
 141                 result = -ENOMEM;
 142                 goto fail_malloc;
 143         }
 144
 145         p->dev.match_id = PS3_MATCH_ID_GELIC;
 146         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
 147         p->dev.bus_id = repo->bus_id;
 148         p->dev.dev_id = repo->dev_id;
 149         p->dev.d_region = &p->d_region;
 150
 151         result = ps3_repository_find_interrupt(repo,
 152                 PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
 153
 154         if (result) {
 155                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
 156                         __func__, __LINE__);
 157                 goto fail_find_interrupt;
 158         }
 159
 160         BUG_ON(p->dev.interrupt_id != 0);
 161
 162         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
 163                 PS3_DMA_OTHER, NULL, 0);
 164
 165         if (result) {
 166                 pr_debug("%s:%d ps3_dma_region_init failed\n",
 167                         __func__, __LINE__);
 168                 goto fail_dma_init;
 169         }
 170
 171         result = ps3_system_bus_device_register(&p->dev);
 172
 173         if (result) {
 174                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 175                         __func__, __LINE__);
 176                 goto fail_device_register;
 177         }
 178
 179         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 180         return result;
 181
 182 fail_device_register:
 183 fail_dma_init:
 184 fail_find_interrupt:
 185         kfree(p);
 186 fail_malloc:
 187         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
 188         return result;
 189 }
 190
 191 static int __init_refok ps3_setup_uhc_device(
 192         const struct ps3_repository_device *repo, enum ps3_match_id match_id,
 193         enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
 194 {
 195         int result;
 196         struct layout {
 197                 struct ps3_system_bus_device dev;
 198                 struct ps3_dma_region d_region;
 199                 struct ps3_mmio_region m_region;
 200         } *p;
 201         u64 bus_addr;
 202         u64 len;
 203
 204         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 205
 206         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
 207         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
 208
 209         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 210
 211         if (!p) {
 212                 result = -ENOMEM;
 213                 goto fail_malloc;
 214         }
 215
 216         p->dev.match_id = match_id;
 217         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
 218         p->dev.bus_id = repo->bus_id;
 219         p->dev.dev_id = repo->dev_id;
 220         p->dev.d_region = &p->d_region;
 221         p->dev.m_region = &p->m_region;
 222
 223         result = ps3_repository_find_interrupt(repo,
 224                 interrupt_type, &p->dev.interrupt_id);
 225
 226         if (result) {
 227                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
 228                         __func__, __LINE__);
 229                 goto fail_find_interrupt;
 230         }
 231
 232         result = ps3_repository_find_reg(repo, reg_type,
 233                 &bus_addr, &len);
 234
 235         if (result) {
 236                 pr_debug("%s:%d ps3_repository_find_reg failed\n",
 237                         __func__, __LINE__);
 238                 goto fail_find_reg;
 239         }
 240
 241         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
 242                 PS3_DMA_INTERNAL, NULL, 0);
 243
 244         if (result) {
 245                 pr_debug("%s:%d ps3_dma_region_init failed\n",
 246                         __func__, __LINE__);
 247                 goto fail_dma_init;
 248         }
 249
 250         result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
 251                 PS3_MMIO_4K);
 252
 253         if (result) {
 254                 pr_debug("%s:%d ps3_mmio_region_init failed\n",
 255                         __func__, __LINE__);
 256                 goto fail_mmio_init;
 257         }
 258
 259         result = ps3_system_bus_device_register(&p->dev);
 260
 261         if (result) {
 262                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 263                         __func__, __LINE__);
 264                 goto fail_device_register;
 265         }
 266
 267         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 268         return result;
 269
 270 fail_device_register:
 271 fail_mmio_init:
 272 fail_dma_init:
 273 fail_find_reg:
 274 fail_find_interrupt:
 275         kfree(p);
 276 fail_malloc:
 277         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
 278         return result;
 279 }
 280
 281 static int __init ps3_setup_ehci_device(
 282         const struct ps3_repository_device *repo)
 283 {
 284         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
 285                 PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
 286 }
 287
 288 static int __init ps3_setup_ohci_device(
 289         const struct ps3_repository_device *repo)
 290 {
 291         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
 292                 PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
 293 }
 294
 295 static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
 296         unsigned int port_number)
 297 {
 298         int result;
 299         struct layout {
 300                 struct ps3_system_bus_device dev;
 301         } *p;
 302
 303         pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
 304                 match_id, port_number);
 305
 306         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 307
 308         if (!p)
 309                 return -ENOMEM;
 310
 311         p->dev.match_id = match_id;
 312         p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
 313         p->dev.port_number = port_number;
 314
 315         result = ps3_system_bus_device_register(&p->dev);
 316
 317         if (result)
 318                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 319                         __func__, __LINE__);
 320
 321         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 322         return result;
 323 }
 324
 325 static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
 326                                  enum ps3_match_id match_id)
 327 {
 328         int result;
 329         struct ps3_storage_device *p;
 330         u64 port, blk_size, num_blocks;
 331         unsigned int num_regions, i;
 332
 333         pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
 334
 335         result = ps3_repository_read_stor_dev_info(repo->bus_index,
 336                                                    repo->dev_index, &port,
 337                                                    &blk_size, &num_blocks,
 338                                                    &num_regions);
 339         if (result) {
 340                 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
 341                        __func__, __LINE__, result);
 342                 return -ENODEV;
 343         }
 344
 345         pr_debug("%s:%u: (%u:%u:%u): port %lu blk_size %lu num_blocks %lu "
 346                  "num_regions %u\n", __func__, __LINE__, repo->bus_index,
 347                  repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
 348                  num_regions);
 349
 350         p = kzalloc(sizeof(struct ps3_storage_device) +
 351                     num_regions * sizeof(struct ps3_storage_region),
 352                     GFP_KERNEL);
 353         if (!p) {
 354                 result = -ENOMEM;
 355                 goto fail_malloc;
 356         }
 357
 358         p->sbd.match_id = match_id;
 359         p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
 360         p->sbd.bus_id = repo->bus_id;
 361         p->sbd.dev_id = repo->dev_id;
 362         p->sbd.d_region = &p->dma_region;
 363         p->blk_size = blk_size;
 364         p->num_regions = num_regions;
 365
 366         result = ps3_repository_find_interrupt(repo,
 367                                                PS3_INTERRUPT_TYPE_EVENT_PORT,
 368                                                &p->sbd.interrupt_id);
 369         if (result) {
 370                 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
 371                        __LINE__, result);
 372                 result = -ENODEV;
 373                 goto fail_find_interrupt;
 374         }
 375
 376         for (i = 0; i < num_regions; i++) {
 377                 unsigned int id;
 378                 u64 start, size;
 379
 380                 result = ps3_repository_read_stor_dev_region(repo->bus_index,
 381                                                              repo->dev_index,
 382                                                              i, &id, &start,
 383                                                              &size);
 384                 if (result) {
 385                         printk(KERN_ERR
 386                                "%s:%u: read_stor_dev_region failed %d\n",
 387                                __func__, __LINE__, result);
 388                         result = -ENODEV;
 389                         goto fail_read_region;
 390                 }
 391                 pr_debug("%s:%u: region %u: id %u start %lu size %lu\n",
 392                          __func__, __LINE__, i, id, start, size);
 393
 394                 p->regions[i].id = id;
 395                 p->regions[i].start = start;
 396                 p->regions[i].size = size;
 397         }
 398
 399         result = ps3_system_bus_device_register(&p->sbd);
 400         if (result) {
 401                 pr_debug("%s:%u ps3_system_bus_device_register failed\n",
 402                          __func__, __LINE__);
 403                 goto fail_device_register;
 404         }
 405
 406         pr_debug(" <- %s:%u\n", __func__, __LINE__);
 407         return 0;
 408
 409 fail_device_register:
 410 fail_read_region:
 411 fail_find_interrupt:
 412         kfree(p);
 413 fail_malloc:
 414         pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
 415         return result;
 416 }
 417
 418 static int __init ps3_register_vuart_devices(void)
 419 {
 420         int result;
 421         unsigned int port_number;
 422
 423         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 424
 425         result = ps3_repository_read_vuart_av_port(&port_number);
 426         if (result)
 427                 port_number = 0; /* av default */
 428
 429         result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
 430         WARN_ON(result);
 431
 432         result = ps3_repository_read_vuart_sysmgr_port(&port_number);
 433         if (result)
 434                 port_number = 2; /* sysmgr default */
 435
 436         result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
 437                 port_number);
 438         WARN_ON(result);
 439
 440         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 441         return result;
 442 }
 443
 444 static int __init ps3_register_sound_devices(void)
 445 {
 446         int result;
 447         struct layout {
 448                 struct ps3_system_bus_device dev;
 449                 struct ps3_dma_region d_region;
 450                 struct ps3_mmio_region m_region;
 451         } *p;
 452
 453         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 454
 455         p = kzalloc(sizeof(*p), GFP_KERNEL);
 456         if (!p)
 457                 return -ENOMEM;
 458
 459         p->dev.match_id = PS3_MATCH_ID_SOUND;
 460         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 461         p->dev.d_region = &p->d_region;
 462         p->dev.m_region = &p->m_region;
 463
 464         result = ps3_system_bus_device_register(&p->dev);
 465
 466         if (result)
 467                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 468                         __func__, __LINE__);
 469
 470         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 471         return result;
 472 }
 473
 474 static 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_GRAPHICS;
 489         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 490
 491         result = ps3_system_bus_device_register(&p->dev);
 492
 493         if (result)
 494                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 495                         __func__, __LINE__);
 496
 497         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 498         return result;
 499 }
 500
 501 /**
 502  * ps3_register_repository_device - Register a device from the repositiory info.
 503  *
 504  */
 505
 506 static int ps3_register_repository_device(
 507         const struct ps3_repository_device *repo)
 508 {
 509         int result;
 510
 511         switch (repo->dev_type) {
 512         case PS3_DEV_TYPE_SB_GELIC:
 513                 result = ps3_setup_gelic_device(repo);
 514                 if (result) {
 515                         pr_debug("%s:%d ps3_setup_gelic_device failed\n",
 516                                 __func__, __LINE__);
 517                 }
 518                 break;
 519         case PS3_DEV_TYPE_SB_USB:
 520
 521                 /* Each USB device has both an EHCI and an OHCI HC */
 522
 523                 result = ps3_setup_ehci_device(repo);
 524
 525                 if (result) {
 526                         pr_debug("%s:%d ps3_setup_ehci_device failed\n",
 527                                 __func__, __LINE__);
 528                 }
 529
 530                 result = ps3_setup_ohci_device(repo);
 531
 532                 if (result) {
 533                         pr_debug("%s:%d ps3_setup_ohci_device failed\n",
 534                                 __func__, __LINE__);
 535                 }
 536                 break;
 537         case PS3_DEV_TYPE_STOR_DISK:
 538                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
 539
 540                 /* Some devices are not accessable from the Other OS lpar. */
 541                 if (result == -ENODEV) {
 542                         result = 0;
 543                         pr_debug("%s:%u: not accessable\n", __func__,
 544                                  __LINE__);
 545                 }
 546
 547                 if (result)
 548                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 549                                  __func__, __LINE__);
 550                 break;
 551
 552         case PS3_DEV_TYPE_STOR_ROM:
 553                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
 554                 if (result)
 555                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 556                                  __func__, __LINE__);
 557                 break;
 558
 559         case PS3_DEV_TYPE_STOR_FLASH:
 560                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
 561                 if (result)
 562                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 563                                  __func__, __LINE__);
 564                 break;
 565
 566         default:
 567                 result = 0;
 568                 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
 569                         repo->dev_type);
 570         }
 571
 572         return result;
 573 }
 574
 575 static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
 576 {
 577         struct ps3_repository_device repo;
 578         int res;
 579         unsigned int retries;
 580         unsigned long rem;
 581
 582         /*
 583          * On some firmware versions (e.g. 1.90), the device may not show up
 584          * in the repository immediately
 585          */
 586         for (retries = 0; retries < 10; retries++) {
 587                 res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
 588                 if (!res)
 589                         goto found;
 590
 591                 rem = msleep_interruptible(100);
 592                 if (rem)
 593                         break;
 594         }
 595         pr_warning("%s:%u: device %lu:%lu not found\n", __func__, __LINE__,
 596                    bus_id, dev_id);
 597         return;
 598
 599 found:
 600         if (retries)
 601                 pr_debug("%s:%u: device %lu:%lu found after %u retries\n",
 602                          __func__, __LINE__, bus_id, dev_id, retries);
 603
 604         ps3_register_repository_device(&repo);
 605         return;
 606 }
 607
 608 #define PS3_NOTIFICATION_DEV_ID         ULONG_MAX
 609 #define PS3_NOTIFICATION_INTERRUPT_ID   0
 610
 611 struct ps3_notification_device {
 612         struct ps3_system_bus_device sbd;
 613         spinlock_t lock;
 614         u64 tag;
 615         u64 lv1_status;
 616         struct completion done;
 617 };
 618
 619 enum ps3_notify_type {
 620         notify_device_ready = 0,
 621         notify_region_probe = 1,
 622         notify_region_update = 2,
 623 };
 624
 625 struct ps3_notify_cmd {
 626         u64 operation_code;             /* must be zero */
 627         u64 event_mask;                 /* OR of 1UL << enum ps3_notify_type */
 628 };
 629
 630 struct ps3_notify_event {
 631         u64 event_type;                 /* enum ps3_notify_type */
 632         u64 bus_id;
 633         u64 dev_id;
 634         u64 dev_type;
 635         u64 dev_port;
 636 };
 637
 638 static irqreturn_t ps3_notification_interrupt(int irq, void *data)
 639 {
 640         struct ps3_notification_device *dev = data;
 641         int res;
 642         u64 tag, status;
 643
 644         spin_lock(&dev->lock);
 645         res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
 646                                            &status);
 647         if (tag != dev->tag)
 648                 pr_err("%s:%u: tag mismatch, got %lx, expected %lx\n",
 649                        __func__, __LINE__, tag, dev->tag);
 650
 651         if (res) {
 652                 pr_err("%s:%u: res %d status 0x%lx\n", __func__, __LINE__, res,
 653                        status);
 654         } else {
 655                 pr_debug("%s:%u: completed, status 0x%lx\n", __func__,
 656                          __LINE__, status);
 657                 dev->lv1_status = status;
 658                 complete(&dev->done);
 659         }
 660         spin_unlock(&dev->lock);
 661         return IRQ_HANDLED;
 662 }
 663
 664 static int ps3_notification_read_write(struct ps3_notification_device *dev,
 665                                        u64 lpar, int write)
 666 {
 667         const char *op = write ? "write" : "read";
 668         unsigned long flags;
 669         int res;
 670
 671         init_completion(&dev->done);
 672         spin_lock_irqsave(&dev->lock, flags);
 673         res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
 674                                         &dev->tag)
 675                     : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
 676                                        &dev->tag);
 677         spin_unlock_irqrestore(&dev->lock, flags);
 678         if (res) {
 679                 pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
 680                 return -EPERM;
 681         }
 682         pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);
 683
 684         res = wait_event_interruptible(dev->done.wait,
 685                                        dev->done.done || kthread_should_stop());
 686         if (kthread_should_stop())
 687                 res = -EINTR;
 688         if (res) {
 689                 pr_debug("%s:%u: interrupted %s\n", __func__, __LINE__, op);
 690                 return res;
 691         }
 692
 693         if (dev->lv1_status) {
 694                 pr_err("%s:%u: %s not completed, status 0x%lx\n", __func__,
 695                        __LINE__, op, dev->lv1_status);
 696                 return -EIO;
 697         }
 698         pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);
 699
 700         return 0;
 701 }
 702
 703 static struct task_struct *probe_task;
 704
 705 /**
 706  * ps3_probe_thread - Background repository probing at system startup.
 707  *
 708  * This implementation only supports background probing on a single bus.
 709  * It uses the hypervisor's storage device notification mechanism to wait until
 710  * a storage device is ready.  The device notification mechanism uses a
 711  * pseudo device to asynchronously notify the guest when storage devices become
 712  * ready.  The notification device has a block size of 512 bytes.
 713  */
 714
 715 static int ps3_probe_thread(void *data)
 716 {
 717         struct ps3_notification_device dev;
 718         int res;
 719         unsigned int irq;
 720         u64 lpar;
 721         void *buf;
 722         struct ps3_notify_cmd *notify_cmd;
 723         struct ps3_notify_event *notify_event;
 724
 725         pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
 726
 727         buf = kzalloc(512, GFP_KERNEL);
 728         if (!buf)
 729                 return -ENOMEM;
 730
 731         lpar = ps3_mm_phys_to_lpar(__pa(buf));
 732         notify_cmd = buf;
 733         notify_event = buf;
 734
 735         /* dummy system bus device */
 736         dev.sbd.bus_id = (u64)data;
 737         dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
 738         dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
 739
 740         res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
 741         if (res) {
 742                 pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
 743                        __LINE__, ps3_result(res));
 744                 goto fail_free;
 745         }
 746
 747         res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
 748                                               &irq);
 749         if (res) {
 750                 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
 751                        __func__, __LINE__, res);
 752                goto fail_close_device;
 753         }
 754
 755         spin_lock_init(&dev.lock);
 756
 757         res = request_irq(irq, ps3_notification_interrupt, IRQF_DISABLED,
 758                           "ps3_notification", &dev);
 759         if (res) {
 760                 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
 761                        res);
 762                 goto fail_sb_event_receive_port_destroy;
 763         }
 764
 765         /* Setup and write the request for device notification. */
 766         notify_cmd->operation_code = 0; /* must be zero */
 767         notify_cmd->event_mask = 1UL << notify_region_probe;
 768
 769         res = ps3_notification_read_write(&dev, lpar, 1);
 770         if (res)
 771                 goto fail_free_irq;
 772
 773         /* Loop here processing the requested notification events. */
 774         do {
 775                 try_to_freeze();
 776
 777                 memset(notify_event, 0, sizeof(*notify_event));
 778
 779                 res = ps3_notification_read_write(&dev, lpar, 0);
 780                 if (res)
 781                         break;
 782
 783                 pr_debug("%s:%u: notify event type 0x%lx bus id %lu dev id %lu"
 784                          " type %lu port %lu\n", __func__, __LINE__,
 785                          notify_event->event_type, notify_event->bus_id,
 786                          notify_event->dev_id, notify_event->dev_type,
 787                          notify_event->dev_port);
 788
 789                 if (notify_event->event_type != notify_region_probe ||
 790                     notify_event->bus_id != dev.sbd.bus_id) {
 791                         pr_warning("%s:%u: bad notify_event: event %lu, "
 792                                    "dev_id %lu, dev_type %lu\n",
 793                                    __func__, __LINE__, notify_event->event_type,
 794                                    notify_event->dev_id,
 795                                    notify_event->dev_type);
 796                         continue;
 797                 }
 798
 799                 ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);
 800
 801         } while (!kthread_should_stop());
 802
 803 fail_free_irq:
 804         free_irq(irq, &dev);
 805 fail_sb_event_receive_port_destroy:
 806         ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
 807 fail_close_device:
 808         lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
 809 fail_free:
 810         kfree(buf);
 811
 812         probe_task = NULL;
 813
 814         pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
 815
 816         return 0;
 817 }
 818
 819 /**
 820  * ps3_stop_probe_thread - Stops the background probe thread.
 821  *
 822  */
 823
 824 static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
 825                                  void *data)
 826 {
 827         if (probe_task)
 828                 kthread_stop(probe_task);
 829         return 0;
 830 }
 831
 832 static struct notifier_block nb = {
 833         .notifier_call = ps3_stop_probe_thread
 834 };
 835
 836 /**
 837  * ps3_start_probe_thread - Starts the background probe thread.
 838  *
 839  */
 840
 841 static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
 842 {
 843         int result;
 844         struct task_struct *task;
 845         struct ps3_repository_device repo;
 846
 847         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 848
 849         memset(&repo, 0, sizeof(repo));
 850
 851         repo.bus_type = bus_type;
 852
 853         result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
 854
 855         if (result) {
 856                 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
 857                 return -ENODEV;
 858         }
 859
 860         result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
 861
 862         if (result) {
 863                 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
 864                         result);
 865                 return -ENODEV;
 866         }
 867
 868         task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
 869                            "ps3-probe-%u", bus_type);
 870
 871         if (IS_ERR(task)) {
 872                 result = PTR_ERR(task);
 873                 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
 874                        result);
 875                 return result;
 876         }
 877
 878         probe_task = task;
 879         register_reboot_notifier(&nb);
 880
 881         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 882         return 0;
 883 }
 884
 885 /**
 886  * ps3_register_devices - Probe the system and register devices found.
 887  *
 888  * A device_initcall() routine.
 889  */
 890
 891 static int __init ps3_register_devices(void)
 892 {
 893         int result;
 894
 895         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 896                 return -ENODEV;
 897
 898         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 899
 900         /* ps3_repository_dump_bus_info(); */
 901
 902         result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
 903
 904         ps3_register_vuart_devices();
 905
 906         ps3_register_graphics_devices();
 907
 908         ps3_repository_find_devices(PS3_BUS_TYPE_SB,
 909                 ps3_register_repository_device);
 910
 911         ps3_register_sound_devices();
 912
 913         ps3_register_lpm_devices();
 914
 915         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 916         return 0;
 917 }
 918
 919 device_initcall(ps3_register_devices);