arch/powerpc/platforms/ps3/system-bus.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  PS3 system bus driver.
   4  *
   5  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
   6  *  Copyright 2006 Sony Corp.
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <linux/export.h>
  12 #include <linux/dma-map-ops.h>
  13 #include <linux/err.h>
  14 #include <linux/slab.h>
  15
  16 #include <asm/udbg.h>
  17 #include <asm/lv1call.h>
  18 #include <asm/firmware.h>
  19 #include <asm/cell-regs.h>
  20
  21 #include "platform.h"
  22
  23 static struct device ps3_system_bus = {
  24         .init_name = "ps3_system",
  25 };
  26
  27 /* FIXME: need device usage counters! */
  28 static struct {
  29         struct mutex mutex;
  30         int sb_11; /* usb 0 */
  31         int sb_12; /* usb 0 */
  32         int gpu;
  33 } usage_hack;
  34
  35 static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
  36                          u64 dev_id)
  37 {
  38         return dev->bus_id == bus_id && dev->dev_id == dev_id;
  39 }
  40
  41 static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
  42 {
  43         int result;
  44
  45         BUG_ON(!dev->bus_id);
  46         mutex_lock(&usage_hack.mutex);
  47
  48         if (ps3_is_device(dev, 1, 1)) {
  49                 usage_hack.sb_11++;
  50                 if (usage_hack.sb_11 > 1) {
  51                         result = 0;
  52                         goto done;
  53                 }
  54         }
  55
  56         if (ps3_is_device(dev, 1, 2)) {
  57                 usage_hack.sb_12++;
  58                 if (usage_hack.sb_12 > 1) {
  59                         result = 0;
  60                         goto done;
  61                 }
  62         }
  63
  64         result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
  65
  66         if (result) {
  67                 pr_warn("%s:%d: lv1_open_device dev=%u.%u(%s) failed: %s\n",
  68                         __func__, __LINE__, dev->match_id, dev->match_sub_id,
  69                         dev_name(&dev->core), ps3_result(result));
  70                 result = -EPERM;
  71         }
  72
  73 done:
  74         mutex_unlock(&usage_hack.mutex);
  75         return result;
  76 }
  77
  78 static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
  79 {
  80         int result;
  81
  82         BUG_ON(!dev->bus_id);
  83         mutex_lock(&usage_hack.mutex);
  84
  85         if (ps3_is_device(dev, 1, 1)) {
  86                 usage_hack.sb_11--;
  87                 if (usage_hack.sb_11) {
  88                         result = 0;
  89                         goto done;
  90                 }
  91         }
  92
  93         if (ps3_is_device(dev, 1, 2)) {
  94                 usage_hack.sb_12--;
  95                 if (usage_hack.sb_12) {
  96                         result = 0;
  97                         goto done;
  98                 }
  99         }
 100
 101         result = lv1_close_device(dev->bus_id, dev->dev_id);
 102         BUG_ON(result);
 103
 104 done:
 105         mutex_unlock(&usage_hack.mutex);
 106         return result;
 107 }
 108
 109 static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
 110 {
 111         int result;
 112
 113         mutex_lock(&usage_hack.mutex);
 114
 115         usage_hack.gpu++;
 116         if (usage_hack.gpu > 1) {
 117                 result = 0;
 118                 goto done;
 119         }
 120
 121         result = lv1_gpu_open(0);
 122
 123         if (result) {
 124                 pr_warn("%s:%d: lv1_gpu_open failed: %s\n", __func__,
 125                         __LINE__, ps3_result(result));
 126                         result = -EPERM;
 127         }
 128
 129 done:
 130         mutex_unlock(&usage_hack.mutex);
 131         return result;
 132 }
 133
 134 static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
 135 {
 136         int result;
 137
 138         mutex_lock(&usage_hack.mutex);
 139
 140         usage_hack.gpu--;
 141         if (usage_hack.gpu) {
 142                 result = 0;
 143                 goto done;
 144         }
 145
 146         result = lv1_gpu_close();
 147         BUG_ON(result);
 148
 149 done:
 150         mutex_unlock(&usage_hack.mutex);
 151         return result;
 152 }
 153
 154 int ps3_open_hv_device(struct ps3_system_bus_device *dev)
 155 {
 156         BUG_ON(!dev);
 157         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
 158
 159         switch (dev->match_id) {
 160         case PS3_MATCH_ID_EHCI:
 161         case PS3_MATCH_ID_OHCI:
 162         case PS3_MATCH_ID_GELIC:
 163         case PS3_MATCH_ID_STOR_DISK:
 164         case PS3_MATCH_ID_STOR_ROM:
 165         case PS3_MATCH_ID_STOR_FLASH:
 166                 return ps3_open_hv_device_sb(dev);
 167
 168         case PS3_MATCH_ID_SOUND:
 169         case PS3_MATCH_ID_GPU:
 170                 return ps3_open_hv_device_gpu(dev);
 171
 172         case PS3_MATCH_ID_AV_SETTINGS:
 173         case PS3_MATCH_ID_SYSTEM_MANAGER:
 174                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
 175                         __LINE__, dev->match_id);
 176                 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
 177                         dev->bus_id);
 178                 BUG();
 179                 return -EINVAL;
 180
 181         default:
 182                 break;
 183         }
 184
 185         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
 186                 dev->match_id);
 187         BUG();
 188         return -ENODEV;
 189 }
 190 EXPORT_SYMBOL_GPL(ps3_open_hv_device);
 191
 192 int ps3_close_hv_device(struct ps3_system_bus_device *dev)
 193 {
 194         BUG_ON(!dev);
 195         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
 196
 197         switch (dev->match_id) {
 198         case PS3_MATCH_ID_EHCI:
 199         case PS3_MATCH_ID_OHCI:
 200         case PS3_MATCH_ID_GELIC:
 201         case PS3_MATCH_ID_STOR_DISK:
 202         case PS3_MATCH_ID_STOR_ROM:
 203         case PS3_MATCH_ID_STOR_FLASH:
 204                 return ps3_close_hv_device_sb(dev);
 205
 206         case PS3_MATCH_ID_SOUND:
 207         case PS3_MATCH_ID_GPU:
 208                 return ps3_close_hv_device_gpu(dev);
 209
 210         case PS3_MATCH_ID_AV_SETTINGS:
 211         case PS3_MATCH_ID_SYSTEM_MANAGER:
 212                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
 213                         __LINE__, dev->match_id);
 214                 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
 215                         dev->bus_id);
 216                 BUG();
 217                 return -EINVAL;
 218
 219         default:
 220                 break;
 221         }
 222
 223         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
 224                 dev->match_id);
 225         BUG();
 226         return -ENODEV;
 227 }
 228 EXPORT_SYMBOL_GPL(ps3_close_hv_device);
 229
 230 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
 231 static void _dump_mmio_region(const struct ps3_mmio_region* r,
 232         const char* func, int line)
 233 {
 234         pr_debug("%s:%d: dev       %llu:%llu\n", func, line, r->dev->bus_id,
 235                 r->dev->dev_id);
 236         pr_debug("%s:%d: bus_addr  %lxh\n", func, line, r->bus_addr);
 237         pr_debug("%s:%d: len       %lxh\n", func, line, r->len);
 238         pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
 239 }
 240
 241 static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
 242 {
 243         int result;
 244         u64 lpar_addr;
 245
 246         result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
 247                 r->bus_addr, r->len, r->page_size, &lpar_addr);
 248         r->lpar_addr = lpar_addr;
 249
 250         if (result) {
 251                 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
 252                         __func__, __LINE__, ps3_result(result));
 253                 r->lpar_addr = 0;
 254         }
 255
 256         dump_mmio_region(r);
 257         return result;
 258 }
 259
 260 static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
 261 {
 262         /* device specific; do nothing currently */
 263         return 0;
 264 }
 265
 266 int ps3_mmio_region_create(struct ps3_mmio_region *r)
 267 {
 268         return r->mmio_ops->create(r);
 269 }
 270 EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
 271
 272 static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
 273 {
 274         int result;
 275
 276         dump_mmio_region(r);
 277         result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
 278                 r->lpar_addr);
 279
 280         if (result)
 281                 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
 282                         __func__, __LINE__, ps3_result(result));
 283
 284         r->lpar_addr = 0;
 285         return result;
 286 }
 287
 288 static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
 289 {
 290         /* device specific; do nothing currently */
 291         return 0;
 292 }
 293
 294
 295 int ps3_free_mmio_region(struct ps3_mmio_region *r)
 296 {
 297         return r->mmio_ops->free(r);
 298 }
 299
 300 EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
 301
 302 static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
 303         .create = ps3_sb_mmio_region_create,
 304         .free = ps3_sb_free_mmio_region
 305 };
 306
 307 static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
 308         .create = ps3_ioc0_mmio_region_create,
 309         .free = ps3_ioc0_free_mmio_region
 310 };
 311
 312 int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
 313         struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
 314         enum ps3_mmio_page_size page_size)
 315 {
 316         r->dev = dev;
 317         r->bus_addr = bus_addr;
 318         r->len = len;
 319         r->page_size = page_size;
 320         switch (dev->dev_type) {
 321         case PS3_DEVICE_TYPE_SB:
 322                 r->mmio_ops = &ps3_mmio_sb_region_ops;
 323                 break;
 324         case PS3_DEVICE_TYPE_IOC0:
 325                 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
 326                 break;
 327         default:
 328                 BUG();
 329                 return -EINVAL;
 330         }
 331         return 0;
 332 }
 333 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
 334
 335 static int ps3_system_bus_match(struct device *_dev,
 336         struct device_driver *_drv)
 337 {
 338         int result;
 339         struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
 340         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 341
 342         if (!dev->match_sub_id)
 343                 result = dev->match_id == drv->match_id;
 344         else
 345                 result = dev->match_sub_id == drv->match_sub_id &&
 346                         dev->match_id == drv->match_id;
 347
 348         if (result)
 349                 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
 350                         __func__, __LINE__,
 351                         dev->match_id, dev->match_sub_id, dev_name(&dev->core),
 352                         drv->match_id, drv->match_sub_id, drv->core.name);
 353         else
 354                 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
 355                         __func__, __LINE__,
 356                         dev->match_id, dev->match_sub_id, dev_name(&dev->core),
 357                         drv->match_id, drv->match_sub_id, drv->core.name);
 358
 359         return result;
 360 }
 361
 362 static int ps3_system_bus_probe(struct device *_dev)
 363 {
 364         int result = 0;
 365         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 366         struct ps3_system_bus_driver *drv;
 367
 368         BUG_ON(!dev);
 369         dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
 370
 371         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 372         BUG_ON(!drv);
 373
 374         if (drv->probe)
 375                 result = drv->probe(dev);
 376         else
 377                 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
 378                         dev_name(&dev->core));
 379
 380         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
 381         return result;
 382 }
 383
 384 static void ps3_system_bus_remove(struct device *_dev)
 385 {
 386         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 387         struct ps3_system_bus_driver *drv;
 388
 389         BUG_ON(!dev);
 390         dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
 391
 392         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 393         BUG_ON(!drv);
 394
 395         if (drv->remove)
 396                 drv->remove(dev);
 397         else
 398                 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
 399                         __func__, __LINE__, drv->core.name);
 400
 401         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
 402 }
 403
 404 static void ps3_system_bus_shutdown(struct device *_dev)
 405 {
 406         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 407         struct ps3_system_bus_driver *drv;
 408
 409         BUG_ON(!dev);
 410
 411         dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
 412                 dev->match_id);
 413
 414         if (!dev->core.driver) {
 415                 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
 416                         __LINE__);
 417                 return;
 418         }
 419
 420         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 421
 422         BUG_ON(!drv);
 423
 424         dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
 425                 dev_name(&dev->core), drv->core.name);
 426
 427         if (drv->shutdown)
 428                 drv->shutdown(dev);
 429         else if (drv->remove) {
 430                 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
 431                         __func__, __LINE__, drv->core.name);
 432                 drv->remove(dev);
 433         } else {
 434                 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
 435                         __func__, __LINE__, drv->core.name);
 436                 BUG();
 437         }
 438
 439         dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
 440 }
 441
 442 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
 443 {
 444         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 445
 446         if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
 447                            dev->match_sub_id))
 448                 return -ENOMEM;
 449         return 0;
 450 }
 451
 452 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
 453         char *buf)
 454 {
 455         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 456         int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
 457                            dev->match_sub_id);
 458
 459         return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
 460 }
 461 static DEVICE_ATTR_RO(modalias);
 462
 463 static struct attribute *ps3_system_bus_dev_attrs[] = {
 464         &dev_attr_modalias.attr,
 465         NULL,
 466 };
 467 ATTRIBUTE_GROUPS(ps3_system_bus_dev);
 468
 469 struct bus_type ps3_system_bus_type = {
 470         .name = "ps3_system_bus",
 471         .match = ps3_system_bus_match,
 472         .uevent = ps3_system_bus_uevent,
 473         .probe = ps3_system_bus_probe,
 474         .remove = ps3_system_bus_remove,
 475         .shutdown = ps3_system_bus_shutdown,
 476         .dev_groups = ps3_system_bus_dev_groups,
 477 };
 478
 479 static int __init ps3_system_bus_init(void)
 480 {
 481         int result;
 482
 483         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 484                 return -ENODEV;
 485
 486         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 487
 488         mutex_init(&usage_hack.mutex);
 489
 490         result = device_register(&ps3_system_bus);
 491         BUG_ON(result);
 492
 493         result = bus_register(&ps3_system_bus_type);
 494         BUG_ON(result);
 495
 496         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 497         return result;
 498 }
 499
 500 core_initcall(ps3_system_bus_init);
 501
 502 /* Allocates a contiguous real buffer and creates mappings over it.
 503  * Returns the virtual address of the buffer and sets dma_handle
 504  * to the dma address (mapping) of the first page.
 505  */
 506 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
 507                                  dma_addr_t *dma_handle, gfp_t flag,
 508                                  unsigned long attrs)
 509 {
 510         int result;
 511         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 512         unsigned long virt_addr;
 513
 514         flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
 515         flag |= __GFP_ZERO;
 516
 517         virt_addr = __get_free_pages(flag, get_order(size));
 518
 519         if (!virt_addr) {
 520                 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
 521                 goto clean_none;
 522         }
 523
 524         result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
 525                              CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 526                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
 527
 528         if (result) {
 529                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 530                         __func__, __LINE__, result);
 531                 BUG_ON("check region type");
 532                 goto clean_alloc;
 533         }
 534
 535         return (void*)virt_addr;
 536
 537 clean_alloc:
 538         free_pages(virt_addr, get_order(size));
 539 clean_none:
 540         dma_handle = NULL;
 541         return NULL;
 542 }
 543
 544 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
 545                               dma_addr_t dma_handle, unsigned long attrs)
 546 {
 547         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 548
 549         ps3_dma_unmap(dev->d_region, dma_handle, size);
 550         free_pages((unsigned long)vaddr, get_order(size));
 551 }
 552
 553 /* Creates TCEs for a user provided buffer.  The user buffer must be
 554  * contiguous real kernel storage (not vmalloc).  The address passed here
 555  * comprises a page address and offset into that page. The dma_addr_t
 556  * returned will point to the same byte within the page as was passed in.
 557  */
 558
 559 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
 560         unsigned long offset, size_t size, enum dma_data_direction direction,
 561         unsigned long attrs)
 562 {
 563         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 564         int result;
 565         dma_addr_t bus_addr;
 566         void *ptr = page_address(page) + offset;
 567
 568         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 569                              &bus_addr,
 570                              CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
 571                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
 572
 573         if (result) {
 574                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 575                         __func__, __LINE__, result);
 576         }
 577
 578         return bus_addr;
 579 }
 580
 581 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
 582                                     unsigned long offset, size_t size,
 583                                     enum dma_data_direction direction,
 584                                     unsigned long attrs)
 585 {
 586         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 587         int result;
 588         dma_addr_t bus_addr;
 589         u64 iopte_flag;
 590         void *ptr = page_address(page) + offset;
 591
 592         iopte_flag = CBE_IOPTE_M;
 593         switch (direction) {
 594         case DMA_BIDIRECTIONAL:
 595                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
 596                 break;
 597         case DMA_TO_DEVICE:
 598                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
 599                 break;
 600         case DMA_FROM_DEVICE:
 601                 iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
 602                 break;
 603         default:
 604                 /* not happned */
 605                 BUG();
 606         };
 607         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 608                              &bus_addr, iopte_flag);
 609
 610         if (result) {
 611                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 612                         __func__, __LINE__, result);
 613         }
 614         return bus_addr;
 615 }
 616
 617 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
 618         size_t size, enum dma_data_direction direction, unsigned long attrs)
 619 {
 620         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 621         int result;
 622
 623         result = ps3_dma_unmap(dev->d_region, dma_addr, size);
 624
 625         if (result) {
 626                 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
 627                         __func__, __LINE__, result);
 628         }
 629 }
 630
 631 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
 632         int nents, enum dma_data_direction direction, unsigned long attrs)
 633 {
 634 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 635         BUG_ON("do");
 636         return -EPERM;
 637 #else
 638         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 639         struct scatterlist *sg;
 640         int i;
 641
 642         for_each_sg(sgl, sg, nents, i) {
 643                 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
 644                                         sg->length, &sg->dma_address, 0);
 645
 646                 if (result) {
 647                         pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 648                                 __func__, __LINE__, result);
 649                         return -EINVAL;
 650                 }
 651
 652                 sg->dma_length = sg->length;
 653         }
 654
 655         return nents;
 656 #endif
 657 }
 658
 659 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
 660                            int nents,
 661                            enum dma_data_direction direction,
 662                            unsigned long attrs)
 663 {
 664         BUG();
 665         return -EINVAL;
 666 }
 667
 668 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
 669         int nents, enum dma_data_direction direction, unsigned long attrs)
 670 {
 671 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 672         BUG_ON("do");
 673 #endif
 674 }
 675
 676 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
 677                             int nents, enum dma_data_direction direction,
 678                             unsigned long attrs)
 679 {
 680         BUG();
 681 }
 682
 683 static int ps3_dma_supported(struct device *_dev, u64 mask)
 684 {
 685         return mask >= DMA_BIT_MASK(32);
 686 }
 687
 688 static const struct dma_map_ops ps3_sb_dma_ops = {
 689         .alloc = ps3_alloc_coherent,
 690         .free = ps3_free_coherent,
 691         .map_sg = ps3_sb_map_sg,
 692         .unmap_sg = ps3_sb_unmap_sg,
 693         .dma_supported = ps3_dma_supported,
 694         .map_page = ps3_sb_map_page,
 695         .unmap_page = ps3_unmap_page,
 696         .mmap = dma_common_mmap,
 697         .get_sgtable = dma_common_get_sgtable,
 698         .alloc_pages = dma_common_alloc_pages,
 699         .free_pages = dma_common_free_pages,
 700 };
 701
 702 static const struct dma_map_ops ps3_ioc0_dma_ops = {
 703         .alloc = ps3_alloc_coherent,
 704         .free = ps3_free_coherent,
 705         .map_sg = ps3_ioc0_map_sg,
 706         .unmap_sg = ps3_ioc0_unmap_sg,
 707         .dma_supported = ps3_dma_supported,
 708         .map_page = ps3_ioc0_map_page,
 709         .unmap_page = ps3_unmap_page,
 710         .mmap = dma_common_mmap,
 711         .get_sgtable = dma_common_get_sgtable,
 712         .alloc_pages = dma_common_alloc_pages,
 713         .free_pages = dma_common_free_pages,
 714 };
 715
 716 /**
 717  * ps3_system_bus_release_device - remove a device from the system bus
 718  */
 719
 720 static void ps3_system_bus_release_device(struct device *_dev)
 721 {
 722         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 723         kfree(dev);
 724 }
 725
 726 /**
 727  * ps3_system_bus_device_register - add a device to the system bus
 728  *
 729  * ps3_system_bus_device_register() expects the dev object to be allocated
 730  * dynamically by the caller.  The system bus takes ownership of the dev
 731  * object and frees the object in ps3_system_bus_release_device().
 732  */
 733
 734 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
 735 {
 736         int result;
 737         static unsigned int dev_ioc0_count;
 738         static unsigned int dev_sb_count;
 739         static unsigned int dev_vuart_count;
 740         static unsigned int dev_lpm_count;
 741
 742         if (!dev->core.parent)
 743                 dev->core.parent = &ps3_system_bus;
 744         dev->core.bus = &ps3_system_bus_type;
 745         dev->core.release = ps3_system_bus_release_device;
 746
 747         switch (dev->dev_type) {
 748         case PS3_DEVICE_TYPE_IOC0:
 749                 dev->core.dma_ops = &ps3_ioc0_dma_ops;
 750                 dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
 751                 break;
 752         case PS3_DEVICE_TYPE_SB:
 753                 dev->core.dma_ops = &ps3_sb_dma_ops;
 754                 dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
 755
 756                 break;
 757         case PS3_DEVICE_TYPE_VUART:
 758                 dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
 759                 break;
 760         case PS3_DEVICE_TYPE_LPM:
 761                 dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
 762                 break;
 763         default:
 764                 BUG();
 765         };
 766
 767         dev->core.of_node = NULL;
 768         set_dev_node(&dev->core, 0);
 769
 770         pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
 771
 772         result = device_register(&dev->core);
 773         return result;
 774 }
 775
 776 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
 777
 778 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
 779 {
 780         int result;
 781
 782         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 783
 784         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 785                 return -ENODEV;
 786
 787         drv->core.bus = &ps3_system_bus_type;
 788
 789         result = driver_register(&drv->core);
 790         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 791         return result;
 792 }
 793
 794 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
 795
 796 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
 797 {
 798         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 799         driver_unregister(&drv->core);
 800         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 801 }
 802
 803 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);