git.oblomov.eu Git - linux-2.6/blob - 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 %llu, rights %llu(%llxh)\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                 goto fail_device_register;
 321         }
 322         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 323         return 0;
 324
 325 fail_device_register:
 326         kfree(p);
 327         pr_debug(" <- %s:%d fail\n", __func__, __LINE__);
 328         return result;
 329 }
 330
 331 static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
 332                                  enum ps3_match_id match_id)
 333 {
 334         int result;
 335         struct ps3_storage_device *p;
 336         u64 port, blk_size, num_blocks;
 337         unsigned int num_regions, i;
 338
 339         pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
 340
 341         result = ps3_repository_read_stor_dev_info(repo->bus_index,
 342                                                    repo->dev_index, &port,
 343                                                    &blk_size, &num_blocks,
 344                                                    &num_regions);
 345         if (result) {
 346                 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
 347                        __func__, __LINE__, result);
 348                 return -ENODEV;
 349         }
 350
 351         pr_debug("%s:%u: (%u:%u:%u): port %llu blk_size %llu num_blocks %llu "
 352                  "num_regions %u\n", __func__, __LINE__, repo->bus_index,
 353                  repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
 354                  num_regions);
 355
 356         p = kzalloc(sizeof(struct ps3_storage_device) +
 357                     num_regions * sizeof(struct ps3_storage_region),
 358                     GFP_KERNEL);
 359         if (!p) {
 360                 result = -ENOMEM;
 361                 goto fail_malloc;
 362         }
 363
 364         p->sbd.match_id = match_id;
 365         p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
 366         p->sbd.bus_id = repo->bus_id;
 367         p->sbd.dev_id = repo->dev_id;
 368         p->sbd.d_region = &p->dma_region;
 369         p->blk_size = blk_size;
 370         p->num_regions = num_regions;
 371
 372         result = ps3_repository_find_interrupt(repo,
 373                                                PS3_INTERRUPT_TYPE_EVENT_PORT,
 374                                                &p->sbd.interrupt_id);
 375         if (result) {
 376                 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
 377                        __LINE__, result);
 378                 result = -ENODEV;
 379                 goto fail_find_interrupt;
 380         }
 381
 382         for (i = 0; i < num_regions; i++) {
 383                 unsigned int id;
 384                 u64 start, size;
 385
 386                 result = ps3_repository_read_stor_dev_region(repo->bus_index,
 387                                                              repo->dev_index,
 388                                                              i, &id, &start,
 389                                                              &size);
 390                 if (result) {
 391                         printk(KERN_ERR
 392                                "%s:%u: read_stor_dev_region failed %d\n",
 393                                __func__, __LINE__, result);
 394                         result = -ENODEV;
 395                         goto fail_read_region;
 396                 }
 397                 pr_debug("%s:%u: region %u: id %u start %llu size %llu\n",
 398                          __func__, __LINE__, i, id, start, size);
 399
 400                 p->regions[i].id = id;
 401                 p->regions[i].start = start;
 402                 p->regions[i].size = size;
 403         }
 404
 405         result = ps3_system_bus_device_register(&p->sbd);
 406         if (result) {
 407                 pr_debug("%s:%u ps3_system_bus_device_register failed\n",
 408                          __func__, __LINE__);
 409                 goto fail_device_register;
 410         }
 411
 412         pr_debug(" <- %s:%u\n", __func__, __LINE__);
 413         return 0;
 414
 415 fail_device_register:
 416 fail_read_region:
 417 fail_find_interrupt:
 418         kfree(p);
 419 fail_malloc:
 420         pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
 421         return result;
 422 }
 423
 424 static int __init ps3_register_vuart_devices(void)
 425 {
 426         int result;
 427         unsigned int port_number;
 428
 429         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 430
 431         result = ps3_repository_read_vuart_av_port(&port_number);
 432         if (result)
 433                 port_number = 0; /* av default */
 434
 435         result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
 436         WARN_ON(result);
 437
 438         result = ps3_repository_read_vuart_sysmgr_port(&port_number);
 439         if (result)
 440                 port_number = 2; /* sysmgr default */
 441
 442         result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
 443                 port_number);
 444         WARN_ON(result);
 445
 446         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 447         return result;
 448 }
 449
 450 static int __init ps3_register_sound_devices(void)
 451 {
 452         int result;
 453         struct layout {
 454                 struct ps3_system_bus_device dev;
 455                 struct ps3_dma_region d_region;
 456                 struct ps3_mmio_region m_region;
 457         } *p;
 458
 459         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 460
 461         p = kzalloc(sizeof(*p), GFP_KERNEL);
 462         if (!p)
 463                 return -ENOMEM;
 464
 465         p->dev.match_id = PS3_MATCH_ID_SOUND;
 466         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 467         p->dev.d_region = &p->d_region;
 468         p->dev.m_region = &p->m_region;
 469
 470         result = ps3_system_bus_device_register(&p->dev);
 471
 472         if (result) {
 473                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 474                         __func__, __LINE__);
 475                 goto fail_device_register;
 476         }
 477         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 478         return 0;
 479
 480 fail_device_register:
 481         kfree(p);
 482         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
 483         return result;
 484 }
 485
 486 static int __init ps3_register_graphics_devices(void)
 487 {
 488         int result;
 489         struct layout {
 490                 struct ps3_system_bus_device dev;
 491         } *p;
 492
 493         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 494
 495         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 496
 497         if (!p)
 498                 return -ENOMEM;
 499
 500         p->dev.match_id = PS3_MATCH_ID_GPU;
 501         p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_FB;
 502         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 503
 504         result = ps3_system_bus_device_register(&p->dev);
 505
 506         if (result) {
 507                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 508                         __func__, __LINE__);
 509                 goto fail_device_register;
 510         }
 511
 512         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 513         return 0;
 514
 515 fail_device_register:
 516         kfree(p);
 517         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
 518         return result;
 519 }
 520
 521 static int __init ps3_register_ramdisk_device(void)
 522 {
 523         int result;
 524         struct layout {
 525                 struct ps3_system_bus_device dev;
 526         } *p;
 527
 528         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 529
 530         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 531
 532         if (!p)
 533                 return -ENOMEM;
 534
 535         p->dev.match_id = PS3_MATCH_ID_GPU;
 536         p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;
 537         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 538
 539         result = ps3_system_bus_device_register(&p->dev);
 540
 541         if (result) {
 542                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 543                         __func__, __LINE__);
 544                 goto fail_device_register;
 545         }
 546
 547         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 548         return 0;
 549
 550 fail_device_register:
 551         kfree(p);
 552         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
 553         return result;
 554 }
 555
 556 /**
 557  * ps3_setup_dynamic_device - Setup a dynamic device from the repository
 558  */
 559
 560 static int ps3_setup_dynamic_device(const struct ps3_repository_device *repo)
 561 {
 562         int result;
 563
 564         switch (repo->dev_type) {
 565         case PS3_DEV_TYPE_STOR_DISK:
 566                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
 567
 568                 /* Some devices are not accessable from the Other OS lpar. */
 569                 if (result == -ENODEV) {
 570                         result = 0;
 571                         pr_debug("%s:%u: not accessable\n", __func__,
 572                                  __LINE__);
 573                 }
 574
 575                 if (result)
 576                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 577                                  __func__, __LINE__);
 578                 break;
 579
 580         case PS3_DEV_TYPE_STOR_ROM:
 581                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
 582                 if (result)
 583                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 584                                  __func__, __LINE__);
 585                 break;
 586
 587         case PS3_DEV_TYPE_STOR_FLASH:
 588                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
 589                 if (result)
 590                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 591                                  __func__, __LINE__);
 592                 break;
 593
 594         default:
 595                 result = 0;
 596                 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
 597                         repo->dev_type);
 598         }
 599
 600         return result;
 601 }
 602
 603 /**
 604  * ps3_setup_static_device - Setup a static device from the repository
 605  */
 606
 607 static int __init ps3_setup_static_device(const struct ps3_repository_device *repo)
 608 {
 609         int result;
 610
 611         switch (repo->dev_type) {
 612         case PS3_DEV_TYPE_SB_GELIC:
 613                 result = ps3_setup_gelic_device(repo);
 614                 if (result) {
 615                         pr_debug("%s:%d ps3_setup_gelic_device failed\n",
 616                                 __func__, __LINE__);
 617                 }
 618                 break;
 619         case PS3_DEV_TYPE_SB_USB:
 620
 621                 /* Each USB device has both an EHCI and an OHCI HC */
 622
 623                 result = ps3_setup_ehci_device(repo);
 624
 625                 if (result) {
 626                         pr_debug("%s:%d ps3_setup_ehci_device failed\n",
 627                                 __func__, __LINE__);
 628                 }
 629
 630                 result = ps3_setup_ohci_device(repo);
 631
 632                 if (result) {
 633                         pr_debug("%s:%d ps3_setup_ohci_device failed\n",
 634                                 __func__, __LINE__);
 635                 }
 636                 break;
 637
 638         default:
 639                 return ps3_setup_dynamic_device(repo);
 640         }
 641
 642         return result;
 643 }
 644
 645 static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
 646 {
 647         struct ps3_repository_device repo;
 648         int res;
 649         unsigned int retries;
 650         unsigned long rem;
 651
 652         /*
 653          * On some firmware versions (e.g. 1.90), the device may not show up
 654          * in the repository immediately
 655          */
 656         for (retries = 0; retries < 10; retries++) {
 657                 res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
 658                 if (!res)
 659                         goto found;
 660
 661                 rem = msleep_interruptible(100);
 662                 if (rem)
 663                         break;
 664         }
 665         pr_warning("%s:%u: device %llu:%llu not found\n", __func__, __LINE__,
 666                    bus_id, dev_id);
 667         return;
 668
 669 found:
 670         if (retries)
 671                 pr_debug("%s:%u: device %llu:%llu found after %u retries\n",
 672                          __func__, __LINE__, bus_id, dev_id, retries);
 673
 674         ps3_setup_dynamic_device(&repo);
 675         return;
 676 }
 677
 678 #define PS3_NOTIFICATION_DEV_ID         ULONG_MAX
 679 #define PS3_NOTIFICATION_INTERRUPT_ID   0
 680
 681 struct ps3_notification_device {
 682         struct ps3_system_bus_device sbd;
 683         spinlock_t lock;
 684         u64 tag;
 685         u64 lv1_status;
 686         struct completion done;
 687 };
 688
 689 enum ps3_notify_type {
 690         notify_device_ready = 0,
 691         notify_region_probe = 1,
 692         notify_region_update = 2,
 693 };
 694
 695 struct ps3_notify_cmd {
 696         u64 operation_code;             /* must be zero */
 697         u64 event_mask;                 /* OR of 1UL << enum ps3_notify_type */
 698 };
 699
 700 struct ps3_notify_event {
 701         u64 event_type;                 /* enum ps3_notify_type */
 702         u64 bus_id;
 703         u64 dev_id;
 704         u64 dev_type;
 705         u64 dev_port;
 706 };
 707
 708 static irqreturn_t ps3_notification_interrupt(int irq, void *data)
 709 {
 710         struct ps3_notification_device *dev = data;
 711         int res;
 712         u64 tag, status;
 713
 714         spin_lock(&dev->lock);
 715         res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
 716                                            &status);
 717         if (tag != dev->tag)
 718                 pr_err("%s:%u: tag mismatch, got %llx, expected %llx\n",
 719                        __func__, __LINE__, tag, dev->tag);
 720
 721         if (res) {
 722                 pr_err("%s:%u: res %d status 0x%llx\n", __func__, __LINE__, res,
 723                        status);
 724         } else {
 725                 pr_debug("%s:%u: completed, status 0x%llx\n", __func__,
 726                          __LINE__, status);
 727                 dev->lv1_status = status;
 728                 complete(&dev->done);
 729         }
 730         spin_unlock(&dev->lock);
 731         return IRQ_HANDLED;
 732 }
 733
 734 static int ps3_notification_read_write(struct ps3_notification_device *dev,
 735                                        u64 lpar, int write)
 736 {
 737         const char *op = write ? "write" : "read";
 738         unsigned long flags;
 739         int res;
 740
 741         init_completion(&dev->done);
 742         spin_lock_irqsave(&dev->lock, flags);
 743         res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
 744                                         &dev->tag)
 745                     : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
 746                                        &dev->tag);
 747         spin_unlock_irqrestore(&dev->lock, flags);
 748         if (res) {
 749                 pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
 750                 return -EPERM;
 751         }
 752         pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);
 753
 754         res = wait_event_interruptible(dev->done.wait,
 755                                        dev->done.done || kthread_should_stop());
 756         if (kthread_should_stop())
 757                 res = -EINTR;
 758         if (res) {
 759                 pr_debug("%s:%u: interrupted %s\n", __func__, __LINE__, op);
 760                 return res;
 761         }
 762
 763         if (dev->lv1_status) {
 764                 pr_err("%s:%u: %s not completed, status 0x%llx\n", __func__,
 765                        __LINE__, op, dev->lv1_status);
 766                 return -EIO;
 767         }
 768         pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);
 769
 770         return 0;
 771 }
 772
 773 static struct task_struct *probe_task;
 774
 775 /**
 776  * ps3_probe_thread - Background repository probing at system startup.
 777  *
 778  * This implementation only supports background probing on a single bus.
 779  * It uses the hypervisor's storage device notification mechanism to wait until
 780  * a storage device is ready.  The device notification mechanism uses a
 781  * pseudo device to asynchronously notify the guest when storage devices become
 782  * ready.  The notification device has a block size of 512 bytes.
 783  */
 784
 785 static int ps3_probe_thread(void *data)
 786 {
 787         struct ps3_notification_device dev;
 788         int res;
 789         unsigned int irq;
 790         u64 lpar;
 791         void *buf;
 792         struct ps3_notify_cmd *notify_cmd;
 793         struct ps3_notify_event *notify_event;
 794
 795         pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
 796
 797         buf = kzalloc(512, GFP_KERNEL);
 798         if (!buf)
 799                 return -ENOMEM;
 800
 801         lpar = ps3_mm_phys_to_lpar(__pa(buf));
 802         notify_cmd = buf;
 803         notify_event = buf;
 804
 805         /* dummy system bus device */
 806         dev.sbd.bus_id = (u64)data;
 807         dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
 808         dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
 809
 810         res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
 811         if (res) {
 812                 pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
 813                        __LINE__, ps3_result(res));
 814                 goto fail_free;
 815         }
 816
 817         res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
 818                                               &irq);
 819         if (res) {
 820                 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
 821                        __func__, __LINE__, res);
 822                goto fail_close_device;
 823         }
 824
 825         spin_lock_init(&dev.lock);
 826
 827         res = request_irq(irq, ps3_notification_interrupt, IRQF_DISABLED,
 828                           "ps3_notification", &dev);
 829         if (res) {
 830                 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
 831                        res);
 832                 goto fail_sb_event_receive_port_destroy;
 833         }
 834
 835         /* Setup and write the request for device notification. */
 836         notify_cmd->operation_code = 0; /* must be zero */
 837         notify_cmd->event_mask = 1UL << notify_region_probe;
 838
 839         res = ps3_notification_read_write(&dev, lpar, 1);
 840         if (res)
 841                 goto fail_free_irq;
 842
 843         /* Loop here processing the requested notification events. */
 844         do {
 845                 try_to_freeze();
 846
 847                 memset(notify_event, 0, sizeof(*notify_event));
 848
 849                 res = ps3_notification_read_write(&dev, lpar, 0);
 850                 if (res)
 851                         break;
 852
 853                 pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu"
 854                          " type %llu port %llu\n", __func__, __LINE__,
 855                          notify_event->event_type, notify_event->bus_id,
 856                          notify_event->dev_id, notify_event->dev_type,
 857                          notify_event->dev_port);
 858
 859                 if (notify_event->event_type != notify_region_probe ||
 860                     notify_event->bus_id != dev.sbd.bus_id) {
 861                         pr_warning("%s:%u: bad notify_event: event %llu, "
 862                                    "dev_id %llu, dev_type %llu\n",
 863                                    __func__, __LINE__, notify_event->event_type,
 864                                    notify_event->dev_id,
 865                                    notify_event->dev_type);
 866                         continue;
 867                 }
 868
 869                 ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);
 870
 871         } while (!kthread_should_stop());
 872
 873 fail_free_irq:
 874         free_irq(irq, &dev);
 875 fail_sb_event_receive_port_destroy:
 876         ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
 877 fail_close_device:
 878         lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
 879 fail_free:
 880         kfree(buf);
 881
 882         probe_task = NULL;
 883
 884         pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
 885
 886         return 0;
 887 }
 888
 889 /**
 890  * ps3_stop_probe_thread - Stops the background probe thread.
 891  *
 892  */
 893
 894 static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
 895                                  void *data)
 896 {
 897         if (probe_task)
 898                 kthread_stop(probe_task);
 899         return 0;
 900 }
 901
 902 static struct notifier_block nb = {
 903         .notifier_call = ps3_stop_probe_thread
 904 };
 905
 906 /**
 907  * ps3_start_probe_thread - Starts the background probe thread.
 908  *
 909  */
 910
 911 static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
 912 {
 913         int result;
 914         struct task_struct *task;
 915         struct ps3_repository_device repo;
 916
 917         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 918
 919         memset(&repo, 0, sizeof(repo));
 920
 921         repo.bus_type = bus_type;
 922
 923         result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
 924
 925         if (result) {
 926                 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
 927                 return -ENODEV;
 928         }
 929
 930         result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
 931
 932         if (result) {
 933                 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
 934                         result);
 935                 return -ENODEV;
 936         }
 937
 938         task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
 939                            "ps3-probe-%u", bus_type);
 940
 941         if (IS_ERR(task)) {
 942                 result = PTR_ERR(task);
 943                 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
 944                        result);
 945                 return result;
 946         }
 947
 948         probe_task = task;
 949         register_reboot_notifier(&nb);
 950
 951         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 952         return 0;
 953 }
 954
 955 /**
 956  * ps3_register_devices - Probe the system and register devices found.
 957  *
 958  * A device_initcall() routine.
 959  */
 960
 961 static int __init ps3_register_devices(void)
 962 {
 963         int result;
 964
 965         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 966                 return -ENODEV;
 967
 968         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 969
 970         /* ps3_repository_dump_bus_info(); */
 971
 972         result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
 973
 974         ps3_register_vuart_devices();
 975
 976         ps3_register_graphics_devices();
 977
 978         ps3_repository_find_devices(PS3_BUS_TYPE_SB, ps3_setup_static_device);
 979
 980         ps3_register_sound_devices();
 981
 982         ps3_register_lpm_devices();
 983
 984         ps3_register_ramdisk_device();
 985
 986         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 987         return 0;
 988 }
 989
 990 device_initcall(ps3_register_devices);