err.no 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 /**
  35  * ps3_setup_gelic_device - Setup and register a gelic device instance.
  36  *
  37  * Allocates memory for a struct ps3_system_bus_device instance, initialises the
  38  * structure members, and registers the device instance with the system bus.
  39  */
  40
  41 static int __init ps3_setup_gelic_device(
  42         const struct ps3_repository_device *repo)
  43 {
  44         int result;
  45         struct layout {
  46                 struct ps3_system_bus_device dev;
  47                 struct ps3_dma_region d_region;
  48         } *p;
  49
  50         pr_debug(" -> %s:%d\n", __func__, __LINE__);
  51
  52         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
  53         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
  54
  55         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
  56
  57         if (!p) {
  58                 result = -ENOMEM;
  59                 goto fail_malloc;
  60         }
  61
  62         p->dev.match_id = PS3_MATCH_ID_GELIC;
  63         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
  64         p->dev.bus_id = repo->bus_id;
  65         p->dev.dev_id = repo->dev_id;
  66         p->dev.d_region = &p->d_region;
  67
  68         result = ps3_repository_find_interrupt(repo,
  69                 PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
  70
  71         if (result) {
  72                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
  73                         __func__, __LINE__);
  74                 goto fail_find_interrupt;
  75         }
  76
  77         BUG_ON(p->dev.interrupt_id != 0);
  78
  79         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
  80                 PS3_DMA_OTHER, NULL, 0);
  81
  82         if (result) {
  83                 pr_debug("%s:%d ps3_dma_region_init failed\n",
  84                         __func__, __LINE__);
  85                 goto fail_dma_init;
  86         }
  87
  88         result = ps3_system_bus_device_register(&p->dev);
  89
  90         if (result) {
  91                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
  92                         __func__, __LINE__);
  93                 goto fail_device_register;
  94         }
  95
  96         pr_debug(" <- %s:%d\n", __func__, __LINE__);
  97         return result;
  98
  99 fail_device_register:
 100 fail_dma_init:
 101 fail_find_interrupt:
 102         kfree(p);
 103 fail_malloc:
 104         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
 105         return result;
 106 }
 107
 108 static int __init_refok ps3_setup_uhc_device(
 109         const struct ps3_repository_device *repo, enum ps3_match_id match_id,
 110         enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
 111 {
 112         int result;
 113         struct layout {
 114                 struct ps3_system_bus_device dev;
 115                 struct ps3_dma_region d_region;
 116                 struct ps3_mmio_region m_region;
 117         } *p;
 118         u64 bus_addr;
 119         u64 len;
 120
 121         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 122
 123         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
 124         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
 125
 126         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 127
 128         if (!p) {
 129                 result = -ENOMEM;
 130                 goto fail_malloc;
 131         }
 132
 133         p->dev.match_id = match_id;
 134         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
 135         p->dev.bus_id = repo->bus_id;
 136         p->dev.dev_id = repo->dev_id;
 137         p->dev.d_region = &p->d_region;
 138         p->dev.m_region = &p->m_region;
 139
 140         result = ps3_repository_find_interrupt(repo,
 141                 interrupt_type, &p->dev.interrupt_id);
 142
 143         if (result) {
 144                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
 145                         __func__, __LINE__);
 146                 goto fail_find_interrupt;
 147         }
 148
 149         result = ps3_repository_find_reg(repo, reg_type,
 150                 &bus_addr, &len);
 151
 152         if (result) {
 153                 pr_debug("%s:%d ps3_repository_find_reg failed\n",
 154                         __func__, __LINE__);
 155                 goto fail_find_reg;
 156         }
 157
 158         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
 159                 PS3_DMA_INTERNAL, NULL, 0);
 160
 161         if (result) {
 162                 pr_debug("%s:%d ps3_dma_region_init failed\n",
 163                         __func__, __LINE__);
 164                 goto fail_dma_init;
 165         }
 166
 167         result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
 168                 PS3_MMIO_4K);
 169
 170         if (result) {
 171                 pr_debug("%s:%d ps3_mmio_region_init failed\n",
 172                         __func__, __LINE__);
 173                 goto fail_mmio_init;
 174         }
 175
 176         result = ps3_system_bus_device_register(&p->dev);
 177
 178         if (result) {
 179                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 180                         __func__, __LINE__);
 181                 goto fail_device_register;
 182         }
 183
 184         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 185         return result;
 186
 187 fail_device_register:
 188 fail_mmio_init:
 189 fail_dma_init:
 190 fail_find_reg:
 191 fail_find_interrupt:
 192         kfree(p);
 193 fail_malloc:
 194         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
 195         return result;
 196 }
 197
 198 static int __init ps3_setup_ehci_device(
 199         const struct ps3_repository_device *repo)
 200 {
 201         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
 202                 PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
 203 }
 204
 205 static int __init ps3_setup_ohci_device(
 206         const struct ps3_repository_device *repo)
 207 {
 208         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
 209                 PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
 210 }
 211
 212 static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
 213         unsigned int port_number)
 214 {
 215         int result;
 216         struct layout {
 217                 struct ps3_system_bus_device dev;
 218         } *p;
 219
 220         pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
 221                 match_id, port_number);
 222
 223         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 224
 225         if (!p)
 226                 return -ENOMEM;
 227
 228         p->dev.match_id = match_id;
 229         p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
 230         p->dev.port_number = port_number;
 231
 232         result = ps3_system_bus_device_register(&p->dev);
 233
 234         if (result)
 235                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 236                         __func__, __LINE__);
 237
 238         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 239         return result;
 240 }
 241
 242 static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
 243                                  enum ps3_match_id match_id)
 244 {
 245         int result;
 246         struct ps3_storage_device *p;
 247         u64 port, blk_size, num_blocks;
 248         unsigned int num_regions, i;
 249
 250         pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
 251
 252         result = ps3_repository_read_stor_dev_info(repo->bus_index,
 253                                                    repo->dev_index, &port,
 254                                                    &blk_size, &num_blocks,
 255                                                    &num_regions);
 256         if (result) {
 257                 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
 258                        __func__, __LINE__, result);
 259                 return -ENODEV;
 260         }
 261
 262         pr_debug("%s:%u: (%u:%u:%u): port %lu blk_size %lu num_blocks %lu "
 263                  "num_regions %u\n", __func__, __LINE__, repo->bus_index,
 264                  repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
 265                  num_regions);
 266
 267         p = kzalloc(sizeof(struct ps3_storage_device) +
 268                     num_regions * sizeof(struct ps3_storage_region),
 269                     GFP_KERNEL);
 270         if (!p) {
 271                 result = -ENOMEM;
 272                 goto fail_malloc;
 273         }
 274
 275         p->sbd.match_id = match_id;
 276         p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
 277         p->sbd.bus_id = repo->bus_id;
 278         p->sbd.dev_id = repo->dev_id;
 279         p->sbd.d_region = &p->dma_region;
 280         p->blk_size = blk_size;
 281         p->num_regions = num_regions;
 282
 283         result = ps3_repository_find_interrupt(repo,
 284                                                PS3_INTERRUPT_TYPE_EVENT_PORT,
 285                                                &p->sbd.interrupt_id);
 286         if (result) {
 287                 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
 288                        __LINE__, result);
 289                 result = -ENODEV;
 290                 goto fail_find_interrupt;
 291         }
 292
 293         for (i = 0; i < num_regions; i++) {
 294                 unsigned int id;
 295                 u64 start, size;
 296
 297                 result = ps3_repository_read_stor_dev_region(repo->bus_index,
 298                                                              repo->dev_index,
 299                                                              i, &id, &start,
 300                                                              &size);
 301                 if (result) {
 302                         printk(KERN_ERR
 303                                "%s:%u: read_stor_dev_region failed %d\n",
 304                                __func__, __LINE__, result);
 305                         result = -ENODEV;
 306                         goto fail_read_region;
 307                 }
 308                 pr_debug("%s:%u: region %u: id %u start %lu size %lu\n",
 309                          __func__, __LINE__, i, id, start, size);
 310
 311                 p->regions[i].id = id;
 312                 p->regions[i].start = start;
 313                 p->regions[i].size = size;
 314         }
 315
 316         result = ps3_system_bus_device_register(&p->sbd);
 317         if (result) {
 318                 pr_debug("%s:%u ps3_system_bus_device_register failed\n",
 319                          __func__, __LINE__);
 320                 goto fail_device_register;
 321         }
 322
 323         pr_debug(" <- %s:%u\n", __func__, __LINE__);
 324         return 0;
 325
 326 fail_device_register:
 327 fail_read_region:
 328 fail_find_interrupt:
 329         kfree(p);
 330 fail_malloc:
 331         pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
 332         return result;
 333 }
 334
 335 static int __init ps3_register_vuart_devices(void)
 336 {
 337         int result;
 338         unsigned int port_number;
 339
 340         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 341
 342         result = ps3_repository_read_vuart_av_port(&port_number);
 343         if (result)
 344                 port_number = 0; /* av default */
 345
 346         result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
 347         WARN_ON(result);
 348
 349         result = ps3_repository_read_vuart_sysmgr_port(&port_number);
 350         if (result)
 351                 port_number = 2; /* sysmgr default */
 352
 353         result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
 354                 port_number);
 355         WARN_ON(result);
 356
 357         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 358         return result;
 359 }
 360
 361 static int __init ps3_register_sound_devices(void)
 362 {
 363         int result;
 364         struct layout {
 365                 struct ps3_system_bus_device dev;
 366                 struct ps3_dma_region d_region;
 367                 struct ps3_mmio_region m_region;
 368         } *p;
 369
 370         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 371
 372         p = kzalloc(sizeof(*p), GFP_KERNEL);
 373         if (!p)
 374                 return -ENOMEM;
 375
 376         p->dev.match_id = PS3_MATCH_ID_SOUND;
 377         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 378         p->dev.d_region = &p->d_region;
 379         p->dev.m_region = &p->m_region;
 380
 381         result = ps3_system_bus_device_register(&p->dev);
 382
 383         if (result)
 384                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 385                         __func__, __LINE__);
 386
 387         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 388         return result;
 389 }
 390
 391 static int __init ps3_register_graphics_devices(void)
 392 {
 393         int result;
 394         struct layout {
 395                 struct ps3_system_bus_device dev;
 396         } *p;
 397
 398         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 399
 400         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
 401
 402         if (!p)
 403                 return -ENOMEM;
 404
 405         p->dev.match_id = PS3_MATCH_ID_GRAPHICS;
 406         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
 407
 408         result = ps3_system_bus_device_register(&p->dev);
 409
 410         if (result)
 411                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
 412                         __func__, __LINE__);
 413
 414         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 415         return result;
 416 }
 417
 418 /**
 419  * ps3_register_repository_device - Register a device from the repositiory info.
 420  *
 421  */
 422
 423 static int ps3_register_repository_device(
 424         const struct ps3_repository_device *repo)
 425 {
 426         int result;
 427
 428         switch (repo->dev_type) {
 429         case PS3_DEV_TYPE_SB_GELIC:
 430                 result = ps3_setup_gelic_device(repo);
 431                 if (result) {
 432                         pr_debug("%s:%d ps3_setup_gelic_device failed\n",
 433                                 __func__, __LINE__);
 434                 }
 435                 break;
 436         case PS3_DEV_TYPE_SB_USB:
 437
 438                 /* Each USB device has both an EHCI and an OHCI HC */
 439
 440                 result = ps3_setup_ehci_device(repo);
 441
 442                 if (result) {
 443                         pr_debug("%s:%d ps3_setup_ehci_device failed\n",
 444                                 __func__, __LINE__);
 445                 }
 446
 447                 result = ps3_setup_ohci_device(repo);
 448
 449                 if (result) {
 450                         pr_debug("%s:%d ps3_setup_ohci_device failed\n",
 451                                 __func__, __LINE__);
 452                 }
 453                 break;
 454         case PS3_DEV_TYPE_STOR_DISK:
 455                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
 456
 457                 /* Some devices are not accessable from the Other OS lpar. */
 458                 if (result == -ENODEV) {
 459                         result = 0;
 460                         pr_debug("%s:%u: not accessable\n", __func__,
 461                                  __LINE__);
 462                 }
 463
 464                 if (result)
 465                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 466                                  __func__, __LINE__);
 467                 break;
 468
 469         case PS3_DEV_TYPE_STOR_ROM:
 470                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
 471                 if (result)
 472                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 473                                  __func__, __LINE__);
 474                 break;
 475
 476         case PS3_DEV_TYPE_STOR_FLASH:
 477                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
 478                 if (result)
 479                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
 480                                  __func__, __LINE__);
 481                 break;
 482
 483         default:
 484                 result = 0;
 485                 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
 486                         repo->dev_type);
 487         }
 488
 489         return result;
 490 }
 491
 492 static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
 493 {
 494         struct ps3_repository_device repo;
 495         int res;
 496         unsigned int retries;
 497         unsigned long rem;
 498
 499         /*
 500          * On some firmware versions (e.g. 1.90), the device may not show up
 501          * in the repository immediately
 502          */
 503         for (retries = 0; retries < 10; retries++) {
 504                 res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
 505                 if (!res)
 506                         goto found;
 507
 508                 rem = msleep_interruptible(100);
 509                 if (rem)
 510                         break;
 511         }
 512         pr_warning("%s:%u: device %lu:%lu not found\n", __func__, __LINE__,
 513                    bus_id, dev_id);
 514         return;
 515
 516 found:
 517         if (retries)
 518                 pr_debug("%s:%u: device %lu:%lu found after %u retries\n",
 519                          __func__, __LINE__, bus_id, dev_id, retries);
 520
 521         ps3_register_repository_device(&repo);
 522         return;
 523 }
 524
 525 #define PS3_NOTIFICATION_DEV_ID         ULONG_MAX
 526 #define PS3_NOTIFICATION_INTERRUPT_ID   0
 527
 528 struct ps3_notification_device {
 529         struct ps3_system_bus_device sbd;
 530         spinlock_t lock;
 531         u64 tag;
 532         u64 lv1_status;
 533         struct completion done;
 534 };
 535
 536 enum ps3_notify_type {
 537         notify_device_ready = 0,
 538         notify_region_probe = 1,
 539         notify_region_update = 2,
 540 };
 541
 542 struct ps3_notify_cmd {
 543         u64 operation_code;             /* must be zero */
 544         u64 event_mask;                 /* OR of 1UL << enum ps3_notify_type */
 545 };
 546
 547 struct ps3_notify_event {
 548         u64 event_type;                 /* enum ps3_notify_type */
 549         u64 bus_id;
 550         u64 dev_id;
 551         u64 dev_type;
 552         u64 dev_port;
 553 };
 554
 555 static irqreturn_t ps3_notification_interrupt(int irq, void *data)
 556 {
 557         struct ps3_notification_device *dev = data;
 558         int res;
 559         u64 tag, status;
 560
 561         spin_lock(&dev->lock);
 562         res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
 563                                            &status);
 564         if (tag != dev->tag)
 565                 pr_err("%s:%u: tag mismatch, got %lx, expected %lx\n",
 566                        __func__, __LINE__, tag, dev->tag);
 567
 568         if (res) {
 569                 pr_err("%s:%u: res %d status 0x%lx\n", __func__, __LINE__, res,
 570                        status);
 571         } else {
 572                 pr_debug("%s:%u: completed, status 0x%lx\n", __func__,
 573                          __LINE__, status);
 574                 dev->lv1_status = status;
 575                 complete(&dev->done);
 576         }
 577         spin_unlock(&dev->lock);
 578         return IRQ_HANDLED;
 579 }
 580
 581 static int ps3_notification_read_write(struct ps3_notification_device *dev,
 582                                        u64 lpar, int write)
 583 {
 584         const char *op = write ? "write" : "read";
 585         unsigned long flags;
 586         int res;
 587
 588         init_completion(&dev->done);
 589         spin_lock_irqsave(&dev->lock, flags);
 590         res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
 591                                         &dev->tag)
 592                     : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
 593                                        &dev->tag);
 594         spin_unlock_irqrestore(&dev->lock, flags);
 595         if (res) {
 596                 pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
 597                 return -EPERM;
 598         }
 599         pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);
 600
 601         res = wait_event_interruptible(dev->done.wait,
 602                                        dev->done.done || kthread_should_stop());
 603         if (kthread_should_stop())
 604                 res = -EINTR;
 605         if (res) {
 606                 pr_debug("%s:%u: interrupted %s\n", __func__, __LINE__, op);
 607                 return res;
 608         }
 609
 610         if (dev->lv1_status) {
 611                 pr_err("%s:%u: %s not completed, status 0x%lx\n", __func__,
 612                        __LINE__, op, dev->lv1_status);
 613                 return -EIO;
 614         }
 615         pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);
 616
 617         return 0;
 618 }
 619
 620 static struct task_struct *probe_task;
 621
 622 /**
 623  * ps3_probe_thread - Background repository probing at system startup.
 624  *
 625  * This implementation only supports background probing on a single bus.
 626  * It uses the hypervisor's storage device notification mechanism to wait until
 627  * a storage device is ready.  The device notification mechanism uses a
 628  * pseudo device to asynchronously notify the guest when storage devices become
 629  * ready.  The notification device has a block size of 512 bytes.
 630  */
 631
 632 static int ps3_probe_thread(void *data)
 633 {
 634         struct ps3_notification_device dev;
 635         int res;
 636         unsigned int irq;
 637         u64 lpar;
 638         void *buf;
 639         struct ps3_notify_cmd *notify_cmd;
 640         struct ps3_notify_event *notify_event;
 641
 642         pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
 643
 644         buf = kzalloc(512, GFP_KERNEL);
 645         if (!buf)
 646                 return -ENOMEM;
 647
 648         lpar = ps3_mm_phys_to_lpar(__pa(buf));
 649         notify_cmd = buf;
 650         notify_event = buf;
 651
 652         /* dummy system bus device */
 653         dev.sbd.bus_id = (u64)data;
 654         dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
 655         dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
 656
 657         res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
 658         if (res) {
 659                 pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
 660                        __LINE__, ps3_result(res));
 661                 goto fail_free;
 662         }
 663
 664         res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
 665                                               &irq);
 666         if (res) {
 667                 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
 668                        __func__, __LINE__, res);
 669                goto fail_close_device;
 670         }
 671
 672         spin_lock_init(&dev.lock);
 673
 674         res = request_irq(irq, ps3_notification_interrupt, IRQF_DISABLED,
 675                           "ps3_notification", &dev);
 676         if (res) {
 677                 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
 678                        res);
 679                 goto fail_sb_event_receive_port_destroy;
 680         }
 681
 682         /* Setup and write the request for device notification. */
 683         notify_cmd->operation_code = 0; /* must be zero */
 684         notify_cmd->event_mask = 1UL << notify_region_probe;
 685
 686         res = ps3_notification_read_write(&dev, lpar, 1);
 687         if (res)
 688                 goto fail_free_irq;
 689
 690         /* Loop here processing the requested notification events. */
 691         do {
 692                 try_to_freeze();
 693
 694                 memset(notify_event, 0, sizeof(*notify_event));
 695
 696                 res = ps3_notification_read_write(&dev, lpar, 0);
 697                 if (res)
 698                         break;
 699
 700                 pr_debug("%s:%u: notify event type 0x%lx bus id %lu dev id %lu"
 701                          " type %lu port %lu\n", __func__, __LINE__,
 702                          notify_event->event_type, notify_event->bus_id,
 703                          notify_event->dev_id, notify_event->dev_type,
 704                          notify_event->dev_port);
 705
 706                 if (notify_event->event_type != notify_region_probe ||
 707                     notify_event->bus_id != dev.sbd.bus_id) {
 708                         pr_warning("%s:%u: bad notify_event: event %lu, "
 709                                    "dev_id %lu, dev_type %lu\n",
 710                                    __func__, __LINE__, notify_event->event_type,
 711                                    notify_event->dev_id,
 712                                    notify_event->dev_type);
 713                         continue;
 714                 }
 715
 716                 ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);
 717
 718         } while (!kthread_should_stop());
 719
 720 fail_free_irq:
 721         free_irq(irq, &dev);
 722 fail_sb_event_receive_port_destroy:
 723         ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
 724 fail_close_device:
 725         lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
 726 fail_free:
 727         kfree(buf);
 728
 729         probe_task = NULL;
 730
 731         pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
 732
 733         return 0;
 734 }
 735
 736 /**
 737  * ps3_stop_probe_thread - Stops the background probe thread.
 738  *
 739  */
 740
 741 static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
 742                                  void *data)
 743 {
 744         if (probe_task)
 745                 kthread_stop(probe_task);
 746         return 0;
 747 }
 748
 749 static struct notifier_block nb = {
 750         .notifier_call = ps3_stop_probe_thread
 751 };
 752
 753 /**
 754  * ps3_start_probe_thread - Starts the background probe thread.
 755  *
 756  */
 757
 758 static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
 759 {
 760         int result;
 761         struct task_struct *task;
 762         struct ps3_repository_device repo;
 763
 764         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 765
 766         memset(&repo, 0, sizeof(repo));
 767
 768         repo.bus_type = bus_type;
 769
 770         result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
 771
 772         if (result) {
 773                 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
 774                 return -ENODEV;
 775         }
 776
 777         result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
 778
 779         if (result) {
 780                 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
 781                         result);
 782                 return -ENODEV;
 783         }
 784
 785         task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
 786                            "ps3-probe-%u", bus_type);
 787
 788         if (IS_ERR(task)) {
 789                 result = PTR_ERR(task);
 790                 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
 791                        result);
 792                 return result;
 793         }
 794
 795         probe_task = task;
 796         register_reboot_notifier(&nb);
 797
 798         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 799         return 0;
 800 }
 801
 802 /**
 803  * ps3_register_devices - Probe the system and register devices found.
 804  *
 805  * A device_initcall() routine.
 806  */
 807
 808 static int __init ps3_register_devices(void)
 809 {
 810         int result;
 811
 812         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 813                 return -ENODEV;
 814
 815         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 816
 817         /* ps3_repository_dump_bus_info(); */
 818
 819         result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
 820
 821         ps3_register_vuart_devices();
 822
 823         ps3_register_graphics_devices();
 824
 825         ps3_repository_find_devices(PS3_BUS_TYPE_SB,
 826                 ps3_register_repository_device);
 827
 828         ps3_register_sound_devices();
 829
 830         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 831         return 0;
 832 }
 833
 834 device_initcall(ps3_register_devices);