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/slab.h>
  27 #include <linux/reboot.h>
  28
  29 #include <asm/firmware.h>
  30 #include <asm/lv1call.h>
  31 #include <asm/ps3stor.h>
  32
  33 #include "platform.h"
  34
  35 static int __init ps3_register_lpm_devices(void)
  36 {
  37         int result;
  38         u64 tmp1;
  39         u64 tmp2;
  40         struct ps3_system_bus_device *dev;
  41
  42         pr_debug(" -> %s:%d\n", __func__, __LINE__);
  43
  44         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
  45         if (!dev)
  46                 return -ENOMEM;
  47
  48         dev->match_id = PS3_MATCH_ID_LPM;
  49         dev->dev_type = PS3_DEVICE_TYPE_LPM;
  50
  51         /* The current lpm driver only supports a single BE processor. */
  52
  53         result = ps3_repository_read_be_node_id(0, &dev->lpm.node_id);
  54
  55         if (result) {
  56                 pr_debug("%s:%d: ps3_repository_read_be_node_id failed \n",
  57                         __func__, __LINE__);
  58                 goto fail_read_repo;
  59         }
  60
  61         result = ps3_repository_read_lpm_privileges(dev->lpm.node_id, &tmp1,
  62                 &dev->lpm.rights);
  63
  64         if (result) {
  65                 pr_debug("%s:%d: ps3_repository_read_lpm_privileges failed\n",
  66                         __func__, __LINE__);
  67                 goto fail_read_repo;
  68         }
  69
  70         lv1_get_logical_partition_id(&tmp2);
  71
  72         if (tmp1 != tmp2) {
  73                 pr_debug("%s:%d: wrong lpar\n",
  74                         __func__, __LINE__);
  75                 result = -ENODEV;
  76                 goto fail_rights;
  77         }
  78
  79         if (!(dev->lpm.rights & PS3_LPM_RIGHTS_USE_LPM)) {
  80                 pr_debug("%s:%d: don't have rights to use lpm\n",
  81                         __func__, __LINE__);
  82                 result = -EPERM;
  83                 goto fail_rights;
  84         }
  85
  86         pr_debug("%s:%d: pu_id %llu, rights %llu(%llxh)\n",
  87                 __func__, __LINE__, dev->lpm.pu_id, dev->lpm.rights,
  88                 dev->lpm.rights);
  89
  90         result = ps3_repository_read_pu_id(0, &dev->lpm.pu_id);
  91
  92         if (result) {
  93                 pr_debug("%s:%d: ps3_repository_read_pu_id failed \n",
  94                         __func__, __LINE__);
  95                 goto fail_read_repo;
  96         }
  97
  98         result = ps3_system_bus_device_register(dev);
  99
 100         if (result) {
 101                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 102                         __func__, __LINE__);
 103                 goto fail_register;
 104         }
 105
 106         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 107         return 0;
 108
 109
 110 fail_register:
 111 fail_rights:
 112 fail_read_repo:
 113         kfree(dev);
 114         pr_debug(" <- %s:%d: failed\n", __func__, __LINE__);
 115         return result;
 116 }
 117
 118 /**
 119  * ps3_setup_gelic_device - Setup and register a gelic device instance.
 120  *
 121  * Allocates memory for a struct ps3_system_bus_device instance, initialises the
 122  * structure members, and registers the device instance with the system bus.
 123  */
 124
 125 static int __init ps3_setup_gelic_device(
 126         const struct ps3_repository_device *repo)
 127 {
 128         int result;
 129         struct layout {
 130                 struct ps3_system_bus_device dev;
 131                 struct ps3_dma_region d_region;
 132         } *p;
 133
 134         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 135
 136         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
 137         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
 138
 139         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 140
 141         if (!p) {
 142                 result = -ENOMEM;
 143                 goto fail_malloc;
 144         }
 145
 146         p->dev.match_id = PS3_MATCH_ID_GELIC;
 147         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
 148         p->dev.bus_id = repo->bus_id;
 149         p->dev.dev_id = repo->dev_id;
 150         p->dev.d_region = &p->d_region;
 151
 152         result = ps3_repository_find_interrupt(repo,
 153                 PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
 154
 155         if (result) {
 156                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
 157                         __func__, __LINE__);
 158                 goto fail_find_interrupt;
 159         }
 160
 161         BUG_ON(p->dev.interrupt_id != 0);
 162
 163         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
 164                 PS3_DMA_OTHER, NULL, 0);
 165
 166         if (result) {
 167                 pr_debug("%s:%d ps3_dma_region_init failed\n",
 168                         __func__, __LINE__);
 169                 goto fail_dma_init;
 170         }
 171
 172         result = ps3_system_bus_device_register(&p->dev);
 173
 174         if (result) {
 175                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 176                         __func__, __LINE__);
 177                 goto fail_device_register;
 178         }
 179
 180         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 181         return result;
 182
 183 fail_device_register:
 184 fail_dma_init:
 185 fail_find_interrupt:
 186         kfree(p);
 187 fail_malloc:
 188         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
 189         return result;
 190 }
 191
 192 static int __ref ps3_setup_uhc_device(
 193         const struct ps3_repository_device *repo, enum ps3_match_id match_id,
 194         enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
 195 {
 196         int result;
 197         struct layout {
 198                 struct ps3_system_bus_device dev;
 199                 struct ps3_dma_region d_region;
 200                 struct ps3_mmio_region m_region;
 201         } *p;
 202         u64 bus_addr;
 203         u64 len;
 204
 205         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 206
 207         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
 208         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
 209
 210         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 211
 212         if (!p) {
 213                 result = -ENOMEM;
 214                 goto fail_malloc;
 215         }
 216
 217         p->dev.match_id = match_id;
 218         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
 219         p->dev.bus_id = repo->bus_id;
 220         p->dev.dev_id = repo->dev_id;
 221         p->dev.d_region = &p->d_region;
 222         p->dev.m_region = &p->m_region;
 223
 224         result = ps3_repository_find_interrupt(repo,
 225                 interrupt_type, &p->dev.interrupt_id);
 226
 227         if (result) {
 228                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
 229                         __func__, __LINE__);
 230                 goto fail_find_interrupt;
 231         }
 232
 233         result = ps3_repository_find_reg(repo, reg_type,
 234                 &bus_addr, &len);
 235
 236         if (result) {
 237                 pr_debug("%s:%d ps3_repository_find_reg failed\n",
 238                         __func__, __LINE__);
 239                 goto fail_find_reg;
 240         }
 241
 242         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
 243                 PS3_DMA_INTERNAL, NULL, 0);
 244
 245         if (result) {
 246                 pr_debug("%s:%d ps3_dma_region_init failed\n",
 247                         __func__, __LINE__);
 248                 goto fail_dma_init;
 249         }
 250
 251         result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
 252                 PS3_MMIO_4K);
 253
 254         if (result) {
 255                 pr_debug("%s:%d ps3_mmio_region_init failed\n",
 256                         __func__, __LINE__);
 257                 goto fail_mmio_init;
 258         }
 259
 260         result = ps3_system_bus_device_register(&p->dev);
 261
 262         if (result) {
 263                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 264                         __func__, __LINE__);
 265                 goto fail_device_register;
 266         }
 267
 268         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 269         return result;
 270
 271 fail_device_register:
 272 fail_mmio_init:
 273 fail_dma_init:
 274 fail_find_reg:
 275 fail_find_interrupt:
 276         kfree(p);
 277 fail_malloc:
 278         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
 279         return result;
 280 }
 281
 282 static int __init ps3_setup_ehci_device(
 283         const struct ps3_repository_device *repo)
 284 {
 285         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
 286                 PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
 287 }
 288
 289 static int __init ps3_setup_ohci_device(
 290         const struct ps3_repository_device *repo)
 291 {
 292         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
 293                 PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
 294 }
 295
 296 static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
 297         unsigned int port_number)
 298 {
 299         int result;
 300         struct layout {
 301                 struct ps3_system_bus_device dev;
 302         } *p;
 303
 304         pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
 305                 match_id, port_number);
 306
 307         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 308
 309         if (!p)
 310                 return -ENOMEM;
 311
 312         p->dev.match_id = match_id;
 313         p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
 314         p->dev.port_number = port_number;
 315
 316         result = ps3_system_bus_device_register(&p->dev);
 317
 318         if (result) {
 319                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 320                         __func__, __LINE__);
 321                 goto fail_device_register;
 322         }
 323         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 324         return 0;
 325
 326 fail_device_register:
 327         kfree(p);
 328         pr_debug(" <- %s:%d fail\n", __func__, __LINE__);
 329         return result;
 330 }
 331
 332 static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
 333                                  enum ps3_match_id match_id)
 334 {
 335         int result;
 336         struct ps3_storage_device *p;
 337         u64 port, blk_size, num_blocks;
 338         unsigned int num_regions, i;
 339
 340         pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
 341
 342         result = ps3_repository_read_stor_dev_info(repo->bus_index,
 343                                                    repo->dev_index, &port,
 344                                                    &blk_size, &num_blocks,
 345                                                    &num_regions);
 346         if (result) {
 347                 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
 348                        __func__, __LINE__, result);
 349                 return -ENODEV;
 350         }
 351
 352         pr_debug("%s:%u: (%u:%u:%u): port %llu blk_size %llu num_blocks %llu "
 353                  "num_regions %u\n", __func__, __LINE__, repo->bus_index,
 354                  repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
 355                  num_regions);
 356
 357         p = kzalloc(sizeof(struct ps3_storage_device) +
 358                     num_regions * sizeof(struct ps3_storage_region),
 359                     GFP_KERNEL);
 360         if (!p) {
 361                 result = -ENOMEM;
 362                 goto fail_malloc;
 363         }
 364
 365         p->sbd.match_id = match_id;
 366         p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
 367         p->sbd.bus_id = repo->bus_id;
 368         p->sbd.dev_id = repo->dev_id;
 369         p->sbd.d_region = &p->dma_region;
 370         p->blk_size = blk_size;
 371         p->num_regions = num_regions;
 372
 373         result = ps3_repository_find_interrupt(repo,
 374                                                PS3_INTERRUPT_TYPE_EVENT_PORT,
 375                                                &p->sbd.interrupt_id);
 376         if (result) {
 377                 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
 378                        __LINE__, result);
 379                 result = -ENODEV;
 380                 goto fail_find_interrupt;
 381         }
 382
 383         for (i = 0; i < num_regions; i++) {
 384                 unsigned int id;
 385                 u64 start, size;
 386
 387                 result = ps3_repository_read_stor_dev_region(repo->bus_index,
 388                                                              repo->dev_index,
 389                                                              i, &id, &start,
 390                                                              &size);
 391                 if (result) {
 392                         printk(KERN_ERR
 393                                "%s:%u: read_stor_dev_region failed %d\n",
 394                                __func__, __LINE__, result);
 395                         result = -ENODEV;
 396                         goto fail_read_region;
 397                 }
 398                 pr_debug("%s:%u: region %u: id %u start %llu size %llu\n",
 399                          __func__, __LINE__, i, id, start, size);
 400
 401                 p->regions[i].id = id;
 402                 p->regions[i].start = start;
 403                 p->regions[i].size = size;
 404         }
 405
 406         result = ps3_system_bus_device_register(&p->sbd);
 407         if (result) {
 408                 pr_debug("%s:%u ps3_system_bus_device_register failed\n",
 409                          __func__, __LINE__);
 410                 goto fail_device_register;
 411         }
 412
 413         pr_debug(" <- %s:%u\n", __func__, __LINE__);
 414         return 0;
 415
 416 fail_device_register:
 417 fail_read_region:
 418 fail_find_interrupt:
 419         kfree(p);
 420 fail_malloc:
 421         pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
 422         return result;
 423 }
 424
 425 static int __init ps3_register_vuart_devices(void)
 426 {
 427         int result;
 428         unsigned int port_number;
 429
 430         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 431
 432         result = ps3_repository_read_vuart_av_port(&port_number);
 433         if (result)
 434                 port_number = 0; /* av default */
 435
 436         result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
 437         WARN_ON(result);
 438
 439         result = ps3_repository_read_vuart_sysmgr_port(&port_number);
 440         if (result)
 441                 port_number = 2; /* sysmgr default */
 442
 443         result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
 444                 port_number);
 445         WARN_ON(result);
 446
 447         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 448         return result;
 449 }
 450
 451 static int __init ps3_register_sound_devices(void)
 452 {
 453         int result;
 454         struct layout {
 455                 struct ps3_system_bus_device dev;
 456                 struct ps3_dma_region d_region;
 457                 struct ps3_mmio_region m_region;
 458         } *p;
 459
 460         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 461
 462         p = kzalloc(sizeof(*p), GFP_KERNEL);
 463         if (!p)
 464                 return -ENOMEM;
 465
 466         p->dev.match_id = PS3_MATCH_ID_SOUND;
 467         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 468         p->dev.d_region = &p->d_region;
 469         p->dev.m_region = &p->m_region;
 470
 471         result = ps3_system_bus_device_register(&p->dev);
 472
 473         if (result) {
 474                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 475                         __func__, __LINE__);
 476                 goto fail_device_register;
 477         }
 478         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 479         return 0;
 480
 481 fail_device_register:
 482         kfree(p);
 483         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
 484         return result;
 485 }
 486
 487 static int __init ps3_register_graphics_devices(void)
 488 {
 489         int result;
 490         struct layout {
 491                 struct ps3_system_bus_device dev;
 492         } *p;
 493
 494         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 495
 496         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 497
 498         if (!p)
 499                 return -ENOMEM;
 500
 501         p->dev.match_id = PS3_MATCH_ID_GPU;
 502         p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_FB;
 503         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 504
 505         result = ps3_system_bus_device_register(&p->dev);
 506
 507         if (result) {
 508                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 509                         __func__, __LINE__);
 510                 goto fail_device_register;
 511         }
 512
 513         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 514         return 0;
 515
 516 fail_device_register:
 517         kfree(p);
 518         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
 519         return result;
 520 }
 521
 522 static int __init ps3_register_ramdisk_device(void)
 523 {
 524         int result;
 525         struct layout {
 526                 struct ps3_system_bus_device dev;
 527         } *p;
 528
 529         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 530
 531         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 532
 533         if (!p)
 534                 return -ENOMEM;
 535
 536         p->dev.match_id = PS3_MATCH_ID_GPU;
 537         p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;
 538         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 539
 540         result = ps3_system_bus_device_register(&p->dev);
 541
 542         if (result) {
 543                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 544                         __func__, __LINE__);
 545                 goto fail_device_register;
 546         }
 547
 548         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 549         return 0;
 550
 551 fail_device_register:
 552         kfree(p);
 553         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
 554         return result;
 555 }
 556
 557 /**
 558  * ps3_setup_dynamic_device - Setup a dynamic device from the repository
 559  */
 560
 561 static int ps3_setup_dynamic_device(const struct ps3_repository_device *repo)
 562 {
 563         int result;
 564
 565         switch (repo->dev_type) {
 566         case PS3_DEV_TYPE_STOR_DISK:
 567                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
 568
 569                 /* Some devices are not accessible from the Other OS lpar. */
 570                 if (result == -ENODEV) {
 571                         result = 0;
 572                         pr_debug("%s:%u: not accessible\n", __func__,
 573                                  __LINE__);
 574                 }
 575
 576                 if (result)
 577                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 578                                  __func__, __LINE__);
 579                 break;
 580
 581         case PS3_DEV_TYPE_STOR_ROM:
 582                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
 583                 if (result)
 584                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 585                                  __func__, __LINE__);
 586                 break;
 587
 588         case PS3_DEV_TYPE_STOR_FLASH:
 589                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
 590                 if (result)
 591                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 592                                  __func__, __LINE__);
 593                 break;
 594
 595         default:
 596                 result = 0;
 597                 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
 598                         repo->dev_type);
 599         }
 600
 601         return result;
 602 }
 603
 604 /**
 605  * ps3_setup_static_device - Setup a static device from the repository
 606  */
 607
 608 static int __init ps3_setup_static_device(const struct ps3_repository_device *repo)
 609 {
 610         int result;
 611
 612         switch (repo->dev_type) {
 613         case PS3_DEV_TYPE_SB_GELIC:
 614                 result = ps3_setup_gelic_device(repo);
 615                 if (result) {
 616                         pr_debug("%s:%d ps3_setup_gelic_device failed\n",
 617                                 __func__, __LINE__);
 618                 }
 619                 break;
 620         case PS3_DEV_TYPE_SB_USB:
 621
 622                 /* Each USB device has both an EHCI and an OHCI HC */
 623
 624                 result = ps3_setup_ehci_device(repo);
 625
 626                 if (result) {
 627                         pr_debug("%s:%d ps3_setup_ehci_device failed\n",
 628                                 __func__, __LINE__);
 629                 }
 630
 631                 result = ps3_setup_ohci_device(repo);
 632
 633                 if (result) {
 634                         pr_debug("%s:%d ps3_setup_ohci_device failed\n",
 635                                 __func__, __LINE__);
 636                 }
 637                 break;
 638
 639         default:
 640                 return ps3_setup_dynamic_device(repo);
 641         }
 642
 643         return result;
 644 }
 645
 646 static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
 647 {
 648         struct ps3_repository_device repo;
 649         int res;
 650         unsigned int retries;
 651         unsigned long rem;
 652
 653         /*
 654          * On some firmware versions (e.g. 1.90), the device may not show up
 655          * in the repository immediately
 656          */
 657         for (retries = 0; retries < 10; retries++) {
 658                 res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
 659                 if (!res)
 660                         goto found;
 661
 662                 rem = msleep_interruptible(100);
 663                 if (rem)
 664                         break;
 665         }
 666         pr_warn("%s:%u: device %llu:%llu not found\n",
 667                 __func__, __LINE__, bus_id, dev_id);
 668         return;
 669
 670 found:
 671         if (retries)
 672                 pr_debug("%s:%u: device %llu:%llu found after %u retries\n",
 673                          __func__, __LINE__, bus_id, dev_id, retries);
 674
 675         ps3_setup_dynamic_device(&repo);
 676         return;
 677 }
 678
 679 #define PS3_NOTIFICATION_DEV_ID         ULONG_MAX
 680 #define PS3_NOTIFICATION_INTERRUPT_ID   0
 681
 682 struct ps3_notification_device {
 683         struct ps3_system_bus_device sbd;
 684         spinlock_t lock;
 685         u64 tag;
 686         u64 lv1_status;
 687         struct completion done;
 688 };
 689
 690 enum ps3_notify_type {
 691         notify_device_ready = 0,
 692         notify_region_probe = 1,
 693         notify_region_update = 2,
 694 };
 695
 696 struct ps3_notify_cmd {
 697         u64 operation_code;             /* must be zero */
 698         u64 event_mask;                 /* OR of 1UL << enum ps3_notify_type */
 699 };
 700
 701 struct ps3_notify_event {
 702         u64 event_type;                 /* enum ps3_notify_type */
 703         u64 bus_id;
 704         u64 dev_id;
 705         u64 dev_type;
 706         u64 dev_port;
 707 };
 708
 709 static irqreturn_t ps3_notification_interrupt(int irq, void *data)
 710 {
 711         struct ps3_notification_device *dev = data;
 712         int res;
 713         u64 tag, status;
 714
 715         spin_lock(&dev->lock);
 716         res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
 717                                            &status);
 718         if (tag != dev->tag)
 719                 pr_err("%s:%u: tag mismatch, got %llx, expected %llx\n",
 720                        __func__, __LINE__, tag, dev->tag);
 721
 722         if (res) {
 723                 pr_err("%s:%u: res %d status 0x%llx\n", __func__, __LINE__, res,
 724                        status);
 725         } else {
 726                 pr_debug("%s:%u: completed, status 0x%llx\n", __func__,
 727                          __LINE__, status);
 728                 dev->lv1_status = status;
 729                 complete(&dev->done);
 730         }
 731         spin_unlock(&dev->lock);
 732         return IRQ_HANDLED;
 733 }
 734
 735 static int ps3_notification_read_write(struct ps3_notification_device *dev,
 736                                        u64 lpar, int write)
 737 {
 738         const char *op = write ? "write" : "read";
 739         unsigned long flags;
 740         int res;
 741
 742         init_completion(&dev->done);
 743         spin_lock_irqsave(&dev->lock, flags);
 744         res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
 745                                         &dev->tag)
 746                     : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
 747                                        &dev->tag);
 748         spin_unlock_irqrestore(&dev->lock, flags);
 749         if (res) {
 750                 pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
 751                 return -EPERM;
 752         }
 753         pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);
 754
 755         res = wait_event_interruptible(dev->done.wait,
 756                                        dev->done.done || kthread_should_stop());
 757         if (kthread_should_stop())
 758                 res = -EINTR;
 759         if (res) {
 760                 pr_debug("%s:%u: interrupted %s\n", __func__, __LINE__, op);
 761                 return res;
 762         }
 763
 764         if (dev->lv1_status) {
 765                 pr_err("%s:%u: %s not completed, status 0x%llx\n", __func__,
 766                        __LINE__, op, dev->lv1_status);
 767                 return -EIO;
 768         }
 769         pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);
 770
 771         return 0;
 772 }
 773
 774 static struct task_struct *probe_task;
 775
 776 /**
 777  * ps3_probe_thread - Background repository probing at system startup.
 778  *
 779  * This implementation only supports background probing on a single bus.
 780  * It uses the hypervisor's storage device notification mechanism to wait until
 781  * a storage device is ready.  The device notification mechanism uses a
 782  * pseudo device to asynchronously notify the guest when storage devices become
 783  * ready.  The notification device has a block size of 512 bytes.
 784  */
 785
 786 static int ps3_probe_thread(void *data)
 787 {
 788         struct ps3_notification_device dev;
 789         int res;
 790         unsigned int irq;
 791         u64 lpar;
 792         void *buf;
 793         struct ps3_notify_cmd *notify_cmd;
 794         struct ps3_notify_event *notify_event;
 795
 796         pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
 797
 798         buf = kzalloc(512, GFP_KERNEL);
 799         if (!buf)
 800                 return -ENOMEM;
 801
 802         lpar = ps3_mm_phys_to_lpar(__pa(buf));
 803         notify_cmd = buf;
 804         notify_event = buf;
 805
 806         /* dummy system bus device */
 807         dev.sbd.bus_id = (u64)data;
 808         dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
 809         dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
 810
 811         res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
 812         if (res) {
 813                 pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
 814                        __LINE__, ps3_result(res));
 815                 goto fail_free;
 816         }
 817
 818         res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
 819                                               &irq);
 820         if (res) {
 821                 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
 822                        __func__, __LINE__, res);
 823                goto fail_close_device;
 824         }
 825
 826         spin_lock_init(&dev.lock);
 827
 828         res = request_irq(irq, ps3_notification_interrupt, 0,
 829                           "ps3_notification", &dev);
 830         if (res) {
 831                 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
 832                        res);
 833                 goto fail_sb_event_receive_port_destroy;
 834         }
 835
 836         /* Setup and write the request for device notification. */
 837         notify_cmd->operation_code = 0; /* must be zero */
 838         notify_cmd->event_mask = 1UL << notify_region_probe;
 839
 840         res = ps3_notification_read_write(&dev, lpar, 1);
 841         if (res)
 842                 goto fail_free_irq;
 843
 844         /* Loop here processing the requested notification events. */
 845         do {
 846                 try_to_freeze();
 847
 848                 memset(notify_event, 0, sizeof(*notify_event));
 849
 850                 res = ps3_notification_read_write(&dev, lpar, 0);
 851                 if (res)
 852                         break;
 853
 854                 pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu"
 855                          " type %llu port %llu\n", __func__, __LINE__,
 856                          notify_event->event_type, notify_event->bus_id,
 857                          notify_event->dev_id, notify_event->dev_type,
 858                          notify_event->dev_port);
 859
 860                 if (notify_event->event_type != notify_region_probe ||
 861                     notify_event->bus_id != dev.sbd.bus_id) {
 862                         pr_warn("%s:%u: bad notify_event: event %llu, dev_id %llu, dev_type %llu\n",
 863                                 __func__, __LINE__, notify_event->event_type,
 864                                 notify_event->dev_id, notify_event->dev_type);
 865                         continue;
 866                 }
 867
 868                 ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);
 869
 870         } while (!kthread_should_stop());
 871
 872 fail_free_irq:
 873         free_irq(irq, &dev);
 874 fail_sb_event_receive_port_destroy:
 875         ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
 876 fail_close_device:
 877         lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
 878 fail_free:
 879         kfree(buf);
 880
 881         probe_task = NULL;
 882
 883         pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
 884
 885         return 0;
 886 }
 887
 888 /**
 889  * ps3_stop_probe_thread - Stops the background probe thread.
 890  *
 891  */
 892
 893 static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
 894                                  void *data)
 895 {
 896         if (probe_task)
 897                 kthread_stop(probe_task);
 898         return 0;
 899 }
 900
 901 static struct notifier_block nb = {
 902         .notifier_call = ps3_stop_probe_thread
 903 };
 904
 905 /**
 906  * ps3_start_probe_thread - Starts the background probe thread.
 907  *
 908  */
 909
 910 static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
 911 {
 912         int result;
 913         struct task_struct *task;
 914         struct ps3_repository_device repo;
 915
 916         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 917
 918         memset(&repo, 0, sizeof(repo));
 919
 920         repo.bus_type = bus_type;
 921
 922         result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
 923
 924         if (result) {
 925                 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
 926                 return -ENODEV;
 927         }
 928
 929         result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
 930
 931         if (result) {
 932                 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
 933                         result);
 934                 return -ENODEV;
 935         }
 936
 937         task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
 938                            "ps3-probe-%u", bus_type);
 939
 940         if (IS_ERR(task)) {
 941                 result = PTR_ERR(task);
 942                 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
 943                        result);
 944                 return result;
 945         }
 946
 947         probe_task = task;
 948         register_reboot_notifier(&nb);
 949
 950         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 951         return 0;
 952 }
 953
 954 /**
 955  * ps3_register_devices - Probe the system and register devices found.
 956  *
 957  * A device_initcall() routine.
 958  */
 959
 960 static int __init ps3_register_devices(void)
 961 {
 962         int result;
 963
 964         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 965                 return -ENODEV;
 966
 967         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 968
 969         /* ps3_repository_dump_bus_info(); */
 970
 971         result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
 972
 973         ps3_register_vuart_devices();
 974
 975         ps3_register_graphics_devices();
 976
 977         ps3_repository_find_devices(PS3_BUS_TYPE_SB, ps3_setup_static_device);
 978
 979         ps3_register_sound_devices();
 980
 981         ps3_register_lpm_devices();
 982
 983         ps3_register_ramdisk_device();
 984
 985         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 986         return 0;
 987 }
 988
 989 device_initcall(ps3_register_devices);