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

   1 /*
   2  *  PS3 system bus driver.
   3  *
   4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
   5  *  Copyright 2006 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/kernel.h>
  22 #include <linux/init.h>
  23 #include <linux/export.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/err.h>
  26 #include <linux/slab.h>
  27
  28 #include <asm/udbg.h>
  29 #include <asm/lv1call.h>
  30 #include <asm/firmware.h>
  31 #include <asm/cell-regs.h>
  32
  33 #include "platform.h"
  34
  35 static struct device ps3_system_bus = {
  36         .init_name = "ps3_system",
  37 };
  38
  39 /* FIXME: need device usage counters! */
  40 struct {
  41         struct mutex mutex;
  42         int sb_11; /* usb 0 */
  43         int sb_12; /* usb 0 */
  44         int gpu;
  45 } static usage_hack;
  46
  47 static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
  48                          u64 dev_id)
  49 {
  50         return dev->bus_id == bus_id && dev->dev_id == dev_id;
  51 }
  52
  53 static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
  54 {
  55         int result;
  56
  57         BUG_ON(!dev->bus_id);
  58         mutex_lock(&usage_hack.mutex);
  59
  60         if (ps3_is_device(dev, 1, 1)) {
  61                 usage_hack.sb_11++;
  62                 if (usage_hack.sb_11 > 1) {
  63                         result = 0;
  64                         goto done;
  65                 }
  66         }
  67
  68         if (ps3_is_device(dev, 1, 2)) {
  69                 usage_hack.sb_12++;
  70                 if (usage_hack.sb_12 > 1) {
  71                         result = 0;
  72                         goto done;
  73                 }
  74         }
  75
  76         result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
  77
  78         if (result) {
  79                 pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
  80                         __LINE__, ps3_result(result));
  81                         result = -EPERM;
  82         }
  83
  84 done:
  85         mutex_unlock(&usage_hack.mutex);
  86         return result;
  87 }
  88
  89 static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
  90 {
  91         int result;
  92
  93         BUG_ON(!dev->bus_id);
  94         mutex_lock(&usage_hack.mutex);
  95
  96         if (ps3_is_device(dev, 1, 1)) {
  97                 usage_hack.sb_11--;
  98                 if (usage_hack.sb_11) {
  99                         result = 0;
 100                         goto done;
 101                 }
 102         }
 103
 104         if (ps3_is_device(dev, 1, 2)) {
 105                 usage_hack.sb_12--;
 106                 if (usage_hack.sb_12) {
 107                         result = 0;
 108                         goto done;
 109                 }
 110         }
 111
 112         result = lv1_close_device(dev->bus_id, dev->dev_id);
 113         BUG_ON(result);
 114
 115 done:
 116         mutex_unlock(&usage_hack.mutex);
 117         return result;
 118 }
 119
 120 static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
 121 {
 122         int result;
 123
 124         mutex_lock(&usage_hack.mutex);
 125
 126         usage_hack.gpu++;
 127         if (usage_hack.gpu > 1) {
 128                 result = 0;
 129                 goto done;
 130         }
 131
 132         result = lv1_gpu_open(0);
 133
 134         if (result) {
 135                 pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
 136                         __LINE__, ps3_result(result));
 137                         result = -EPERM;
 138         }
 139
 140 done:
 141         mutex_unlock(&usage_hack.mutex);
 142         return result;
 143 }
 144
 145 static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
 146 {
 147         int result;
 148
 149         mutex_lock(&usage_hack.mutex);
 150
 151         usage_hack.gpu--;
 152         if (usage_hack.gpu) {
 153                 result = 0;
 154                 goto done;
 155         }
 156
 157         result = lv1_gpu_close();
 158         BUG_ON(result);
 159
 160 done:
 161         mutex_unlock(&usage_hack.mutex);
 162         return result;
 163 }
 164
 165 int ps3_open_hv_device(struct ps3_system_bus_device *dev)
 166 {
 167         BUG_ON(!dev);
 168         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
 169
 170         switch (dev->match_id) {
 171         case PS3_MATCH_ID_EHCI:
 172         case PS3_MATCH_ID_OHCI:
 173         case PS3_MATCH_ID_GELIC:
 174         case PS3_MATCH_ID_STOR_DISK:
 175         case PS3_MATCH_ID_STOR_ROM:
 176         case PS3_MATCH_ID_STOR_FLASH:
 177                 return ps3_open_hv_device_sb(dev);
 178
 179         case PS3_MATCH_ID_SOUND:
 180         case PS3_MATCH_ID_GPU:
 181                 return ps3_open_hv_device_gpu(dev);
 182
 183         case PS3_MATCH_ID_AV_SETTINGS:
 184         case PS3_MATCH_ID_SYSTEM_MANAGER:
 185                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
 186                         __LINE__, dev->match_id);
 187                 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
 188                         dev->bus_id);
 189                 BUG();
 190                 return -EINVAL;
 191
 192         default:
 193                 break;
 194         }
 195
 196         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
 197                 dev->match_id);
 198         BUG();
 199         return -ENODEV;
 200 }
 201 EXPORT_SYMBOL_GPL(ps3_open_hv_device);
 202
 203 int ps3_close_hv_device(struct ps3_system_bus_device *dev)
 204 {
 205         BUG_ON(!dev);
 206         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
 207
 208         switch (dev->match_id) {
 209         case PS3_MATCH_ID_EHCI:
 210         case PS3_MATCH_ID_OHCI:
 211         case PS3_MATCH_ID_GELIC:
 212         case PS3_MATCH_ID_STOR_DISK:
 213         case PS3_MATCH_ID_STOR_ROM:
 214         case PS3_MATCH_ID_STOR_FLASH:
 215                 return ps3_close_hv_device_sb(dev);
 216
 217         case PS3_MATCH_ID_SOUND:
 218         case PS3_MATCH_ID_GPU:
 219                 return ps3_close_hv_device_gpu(dev);
 220
 221         case PS3_MATCH_ID_AV_SETTINGS:
 222         case PS3_MATCH_ID_SYSTEM_MANAGER:
 223                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
 224                         __LINE__, dev->match_id);
 225                 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
 226                         dev->bus_id);
 227                 BUG();
 228                 return -EINVAL;
 229
 230         default:
 231                 break;
 232         }
 233
 234         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
 235                 dev->match_id);
 236         BUG();
 237         return -ENODEV;
 238 }
 239 EXPORT_SYMBOL_GPL(ps3_close_hv_device);
 240
 241 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
 242 static void _dump_mmio_region(const struct ps3_mmio_region* r,
 243         const char* func, int line)
 244 {
 245         pr_debug("%s:%d: dev       %llu:%llu\n", func, line, r->dev->bus_id,
 246                 r->dev->dev_id);
 247         pr_debug("%s:%d: bus_addr  %lxh\n", func, line, r->bus_addr);
 248         pr_debug("%s:%d: len       %lxh\n", func, line, r->len);
 249         pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
 250 }
 251
 252 static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
 253 {
 254         int result;
 255         u64 lpar_addr;
 256
 257         result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
 258                 r->bus_addr, r->len, r->page_size, &lpar_addr);
 259         r->lpar_addr = lpar_addr;
 260
 261         if (result) {
 262                 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
 263                         __func__, __LINE__, ps3_result(result));
 264                 r->lpar_addr = 0;
 265         }
 266
 267         dump_mmio_region(r);
 268         return result;
 269 }
 270
 271 static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
 272 {
 273         /* device specific; do nothing currently */
 274         return 0;
 275 }
 276
 277 int ps3_mmio_region_create(struct ps3_mmio_region *r)
 278 {
 279         return r->mmio_ops->create(r);
 280 }
 281 EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
 282
 283 static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
 284 {
 285         int result;
 286
 287         dump_mmio_region(r);
 288         result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
 289                 r->lpar_addr);
 290
 291         if (result)
 292                 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
 293                         __func__, __LINE__, ps3_result(result));
 294
 295         r->lpar_addr = 0;
 296         return result;
 297 }
 298
 299 static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
 300 {
 301         /* device specific; do nothing currently */
 302         return 0;
 303 }
 304
 305
 306 int ps3_free_mmio_region(struct ps3_mmio_region *r)
 307 {
 308         return r->mmio_ops->free(r);
 309 }
 310
 311 EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
 312
 313 static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
 314         .create = ps3_sb_mmio_region_create,
 315         .free = ps3_sb_free_mmio_region
 316 };
 317
 318 static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
 319         .create = ps3_ioc0_mmio_region_create,
 320         .free = ps3_ioc0_free_mmio_region
 321 };
 322
 323 int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
 324         struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
 325         enum ps3_mmio_page_size page_size)
 326 {
 327         r->dev = dev;
 328         r->bus_addr = bus_addr;
 329         r->len = len;
 330         r->page_size = page_size;
 331         switch (dev->dev_type) {
 332         case PS3_DEVICE_TYPE_SB:
 333                 r->mmio_ops = &ps3_mmio_sb_region_ops;
 334                 break;
 335         case PS3_DEVICE_TYPE_IOC0:
 336                 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
 337                 break;
 338         default:
 339                 BUG();
 340                 return -EINVAL;
 341         }
 342         return 0;
 343 }
 344 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
 345
 346 static int ps3_system_bus_match(struct device *_dev,
 347         struct device_driver *_drv)
 348 {
 349         int result;
 350         struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
 351         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 352
 353         if (!dev->match_sub_id)
 354                 result = dev->match_id == drv->match_id;
 355         else
 356                 result = dev->match_sub_id == drv->match_sub_id &&
 357                         dev->match_id == drv->match_id;
 358
 359         if (result)
 360                 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
 361                         __func__, __LINE__,
 362                         dev->match_id, dev->match_sub_id, dev_name(&dev->core),
 363                         drv->match_id, drv->match_sub_id, drv->core.name);
 364         else
 365                 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
 366                         __func__, __LINE__,
 367                         dev->match_id, dev->match_sub_id, dev_name(&dev->core),
 368                         drv->match_id, drv->match_sub_id, drv->core.name);
 369
 370         return result;
 371 }
 372
 373 static int ps3_system_bus_probe(struct device *_dev)
 374 {
 375         int result = 0;
 376         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 377         struct ps3_system_bus_driver *drv;
 378
 379         BUG_ON(!dev);
 380         dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
 381
 382         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 383         BUG_ON(!drv);
 384
 385         if (drv->probe)
 386                 result = drv->probe(dev);
 387         else
 388                 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
 389                         dev_name(&dev->core));
 390
 391         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
 392         return result;
 393 }
 394
 395 static int ps3_system_bus_remove(struct device *_dev)
 396 {
 397         int result = 0;
 398         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 399         struct ps3_system_bus_driver *drv;
 400
 401         BUG_ON(!dev);
 402         dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
 403
 404         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 405         BUG_ON(!drv);
 406
 407         if (drv->remove)
 408                 result = drv->remove(dev);
 409         else
 410                 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
 411                         __func__, __LINE__, drv->core.name);
 412
 413         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
 414         return result;
 415 }
 416
 417 static void ps3_system_bus_shutdown(struct device *_dev)
 418 {
 419         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 420         struct ps3_system_bus_driver *drv;
 421
 422         BUG_ON(!dev);
 423
 424         dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
 425                 dev->match_id);
 426
 427         if (!dev->core.driver) {
 428                 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
 429                         __LINE__);
 430                 return;
 431         }
 432
 433         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 434
 435         BUG_ON(!drv);
 436
 437         dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
 438                 dev_name(&dev->core), drv->core.name);
 439
 440         if (drv->shutdown)
 441                 drv->shutdown(dev);
 442         else if (drv->remove) {
 443                 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
 444                         __func__, __LINE__, drv->core.name);
 445                 drv->remove(dev);
 446         } else {
 447                 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
 448                         __func__, __LINE__, drv->core.name);
 449                 BUG();
 450         }
 451
 452         dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
 453 }
 454
 455 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
 456 {
 457         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 458
 459         if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
 460                            dev->match_sub_id))
 461                 return -ENOMEM;
 462         return 0;
 463 }
 464
 465 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
 466         char *buf)
 467 {
 468         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 469         int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
 470                            dev->match_sub_id);
 471
 472         return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
 473 }
 474
 475 static struct device_attribute ps3_system_bus_dev_attrs[] = {
 476         __ATTR_RO(modalias),
 477         __ATTR_NULL,
 478 };
 479
 480 struct bus_type ps3_system_bus_type = {
 481         .name = "ps3_system_bus",
 482         .match = ps3_system_bus_match,
 483         .uevent = ps3_system_bus_uevent,
 484         .probe = ps3_system_bus_probe,
 485         .remove = ps3_system_bus_remove,
 486         .shutdown = ps3_system_bus_shutdown,
 487         .dev_attrs = ps3_system_bus_dev_attrs,
 488 };
 489
 490 static int __init ps3_system_bus_init(void)
 491 {
 492         int result;
 493
 494         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 495                 return -ENODEV;
 496
 497         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 498
 499         mutex_init(&usage_hack.mutex);
 500
 501         result = device_register(&ps3_system_bus);
 502         BUG_ON(result);
 503
 504         result = bus_register(&ps3_system_bus_type);
 505         BUG_ON(result);
 506
 507         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 508         return result;
 509 }
 510
 511 core_initcall(ps3_system_bus_init);
 512
 513 /* Allocates a contiguous real buffer and creates mappings over it.
 514  * Returns the virtual address of the buffer and sets dma_handle
 515  * to the dma address (mapping) of the first page.
 516  */
 517 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
 518                                       dma_addr_t *dma_handle, gfp_t flag)
 519 {
 520         int result;
 521         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 522         unsigned long virt_addr;
 523
 524         flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
 525         flag |= __GFP_ZERO;
 526
 527         virt_addr = __get_free_pages(flag, get_order(size));
 528
 529         if (!virt_addr) {
 530                 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
 531                 goto clean_none;
 532         }
 533
 534         result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
 535                              CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 536                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
 537
 538         if (result) {
 539                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 540                         __func__, __LINE__, result);
 541                 BUG_ON("check region type");
 542                 goto clean_alloc;
 543         }
 544
 545         return (void*)virt_addr;
 546
 547 clean_alloc:
 548         free_pages(virt_addr, get_order(size));
 549 clean_none:
 550         dma_handle = NULL;
 551         return NULL;
 552 }
 553
 554 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
 555         dma_addr_t dma_handle)
 556 {
 557         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 558
 559         ps3_dma_unmap(dev->d_region, dma_handle, size);
 560         free_pages((unsigned long)vaddr, get_order(size));
 561 }
 562
 563 /* Creates TCEs for a user provided buffer.  The user buffer must be
 564  * contiguous real kernel storage (not vmalloc).  The address passed here
 565  * comprises a page address and offset into that page. The dma_addr_t
 566  * returned will point to the same byte within the page as was passed in.
 567  */
 568
 569 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
 570         unsigned long offset, size_t size, enum dma_data_direction direction,
 571         struct dma_attrs *attrs)
 572 {
 573         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 574         int result;
 575         dma_addr_t bus_addr;
 576         void *ptr = page_address(page) + offset;
 577
 578         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 579                              &bus_addr,
 580                              CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
 581                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
 582
 583         if (result) {
 584                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 585                         __func__, __LINE__, result);
 586         }
 587
 588         return bus_addr;
 589 }
 590
 591 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
 592                                     unsigned long offset, size_t size,
 593                                     enum dma_data_direction direction,
 594                                     struct dma_attrs *attrs)
 595 {
 596         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 597         int result;
 598         dma_addr_t bus_addr;
 599         u64 iopte_flag;
 600         void *ptr = page_address(page) + offset;
 601
 602         iopte_flag = CBE_IOPTE_M;
 603         switch (direction) {
 604         case DMA_BIDIRECTIONAL:
 605                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
 606                 break;
 607         case DMA_TO_DEVICE:
 608                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
 609                 break;
 610         case DMA_FROM_DEVICE:
 611                 iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
 612                 break;
 613         default:
 614                 /* not happned */
 615                 BUG();
 616         };
 617         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 618                              &bus_addr, iopte_flag);
 619
 620         if (result) {
 621                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 622                         __func__, __LINE__, result);
 623         }
 624         return bus_addr;
 625 }
 626
 627 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
 628         size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
 629 {
 630         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 631         int result;
 632
 633         result = ps3_dma_unmap(dev->d_region, dma_addr, size);
 634
 635         if (result) {
 636                 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
 637                         __func__, __LINE__, result);
 638         }
 639 }
 640
 641 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
 642         int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
 643 {
 644 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 645         BUG_ON("do");
 646         return -EPERM;
 647 #else
 648         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 649         struct scatterlist *sg;
 650         int i;
 651
 652         for_each_sg(sgl, sg, nents, i) {
 653                 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
 654                                         sg->length, &sg->dma_address, 0);
 655
 656                 if (result) {
 657                         pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 658                                 __func__, __LINE__, result);
 659                         return -EINVAL;
 660                 }
 661
 662                 sg->dma_length = sg->length;
 663         }
 664
 665         return nents;
 666 #endif
 667 }
 668
 669 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
 670                            int nents,
 671                            enum dma_data_direction direction,
 672                            struct dma_attrs *attrs)
 673 {
 674         BUG();
 675         return 0;
 676 }
 677
 678 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
 679         int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
 680 {
 681 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 682         BUG_ON("do");
 683 #endif
 684 }
 685
 686 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
 687                             int nents, enum dma_data_direction direction,
 688                             struct dma_attrs *attrs)
 689 {
 690         BUG();
 691 }
 692
 693 static int ps3_dma_supported(struct device *_dev, u64 mask)
 694 {
 695         return mask >= DMA_BIT_MASK(32);
 696 }
 697
 698 static u64 ps3_dma_get_required_mask(struct device *_dev)
 699 {
 700         return DMA_BIT_MASK(32);
 701 }
 702
 703 static struct dma_map_ops ps3_sb_dma_ops = {
 704         .alloc_coherent = ps3_alloc_coherent,
 705         .free_coherent = ps3_free_coherent,
 706         .map_sg = ps3_sb_map_sg,
 707         .unmap_sg = ps3_sb_unmap_sg,
 708         .dma_supported = ps3_dma_supported,
 709         .get_required_mask = ps3_dma_get_required_mask,
 710         .map_page = ps3_sb_map_page,
 711         .unmap_page = ps3_unmap_page,
 712 };
 713
 714 static struct dma_map_ops ps3_ioc0_dma_ops = {
 715         .alloc_coherent = ps3_alloc_coherent,
 716         .free_coherent = ps3_free_coherent,
 717         .map_sg = ps3_ioc0_map_sg,
 718         .unmap_sg = ps3_ioc0_unmap_sg,
 719         .dma_supported = ps3_dma_supported,
 720         .get_required_mask = ps3_dma_get_required_mask,
 721         .map_page = ps3_ioc0_map_page,
 722         .unmap_page = ps3_unmap_page,
 723 };
 724
 725 /**
 726  * ps3_system_bus_release_device - remove a device from the system bus
 727  */
 728
 729 static void ps3_system_bus_release_device(struct device *_dev)
 730 {
 731         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 732         kfree(dev);
 733 }
 734
 735 /**
 736  * ps3_system_bus_device_register - add a device to the system bus
 737  *
 738  * ps3_system_bus_device_register() expects the dev object to be allocated
 739  * dynamically by the caller.  The system bus takes ownership of the dev
 740  * object and frees the object in ps3_system_bus_release_device().
 741  */
 742
 743 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
 744 {
 745         int result;
 746         static unsigned int dev_ioc0_count;
 747         static unsigned int dev_sb_count;
 748         static unsigned int dev_vuart_count;
 749         static unsigned int dev_lpm_count;
 750
 751         if (!dev->core.parent)
 752                 dev->core.parent = &ps3_system_bus;
 753         dev->core.bus = &ps3_system_bus_type;
 754         dev->core.release = ps3_system_bus_release_device;
 755
 756         switch (dev->dev_type) {
 757         case PS3_DEVICE_TYPE_IOC0:
 758                 dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
 759                 dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
 760                 break;
 761         case PS3_DEVICE_TYPE_SB:
 762                 dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
 763                 dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
 764
 765                 break;
 766         case PS3_DEVICE_TYPE_VUART:
 767                 dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
 768                 break;
 769         case PS3_DEVICE_TYPE_LPM:
 770                 dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
 771                 break;
 772         default:
 773                 BUG();
 774         };
 775
 776         dev->core.of_node = NULL;
 777         set_dev_node(&dev->core, 0);
 778
 779         pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
 780
 781         result = device_register(&dev->core);
 782         return result;
 783 }
 784
 785 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
 786
 787 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
 788 {
 789         int result;
 790
 791         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 792
 793         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 794                 return -ENODEV;
 795
 796         drv->core.bus = &ps3_system_bus_type;
 797
 798         result = driver_register(&drv->core);
 799         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 800         return result;
 801 }
 802
 803 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
 804
 805 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
 806 {
 807         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 808         driver_unregister(&drv->core);
 809         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 810 }
 811
 812 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);