release/src-rt-6.x.4708/linux/linux-2.6.36/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/module.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 struct {
  40         struct mutex mutex;
  41         int sb_11; /* usb 0 */
  42         int sb_12; /* usb 0 */
  43         int gpu;
  44 } static usage_hack;
  45
  46 static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
  47                          u64 dev_id)
  48 {
  49         return dev->bus_id == bus_id && dev->dev_id == dev_id;
  50 }
  51
  52 static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
  53 {
  54         int result;
  55
  56         BUG_ON(!dev->bus_id);
  57         mutex_lock(&usage_hack.mutex);
  58
  59         if (ps3_is_device(dev, 1, 1)) {
  60                 usage_hack.sb_11++;
  61                 if (usage_hack.sb_11 > 1) {
  62                         result = 0;
  63                         goto done;
  64                 }
  65         }
  66
  67         if (ps3_is_device(dev, 1, 2)) {
  68                 usage_hack.sb_12++;
  69                 if (usage_hack.sb_12 > 1) {
  70                         result = 0;
  71                         goto done;
  72                 }
  73         }
  74
  75         result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
  76
  77         if (result) {
  78                 pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
  79                         __LINE__, ps3_result(result));
  80                         result = -EPERM;
  81         }
  82
  83 done:
  84         mutex_unlock(&usage_hack.mutex);
  85         return result;
  86 }
  87
  88 static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
  89 {
  90         int result;
  91
  92         BUG_ON(!dev->bus_id);
  93         mutex_lock(&usage_hack.mutex);
  94
  95         if (ps3_is_device(dev, 1, 1)) {
  96                 usage_hack.sb_11--;
  97                 if (usage_hack.sb_11) {
  98                         result = 0;
  99                         goto done;
 100                 }
 101         }
 102
 103         if (ps3_is_device(dev, 1, 2)) {
 104                 usage_hack.sb_12--;
 105                 if (usage_hack.sb_12) {
 106                         result = 0;
 107                         goto done;
 108                 }
 109         }
 110
 111         result = lv1_close_device(dev->bus_id, dev->dev_id);
 112         BUG_ON(result);
 113
 114 done:
 115         mutex_unlock(&usage_hack.mutex);
 116         return result;
 117 }
 118
 119 static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
 120 {
 121         int result;
 122
 123         mutex_lock(&usage_hack.mutex);
 124
 125         usage_hack.gpu++;
 126         if (usage_hack.gpu > 1) {
 127                 result = 0;
 128                 goto done;
 129         }
 130
 131         result = lv1_gpu_open(0);
 132
 133         if (result) {
 134                 pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
 135                         __LINE__, ps3_result(result));
 136                         result = -EPERM;
 137         }
 138
 139 done:
 140         mutex_unlock(&usage_hack.mutex);
 141         return result;
 142 }
 143
 144 static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
 145 {
 146         int result;
 147
 148         mutex_lock(&usage_hack.mutex);
 149
 150         usage_hack.gpu--;
 151         if (usage_hack.gpu) {
 152                 result = 0;
 153                 goto done;
 154         }
 155
 156         result = lv1_gpu_close();
 157         BUG_ON(result);
 158
 159 done:
 160         mutex_unlock(&usage_hack.mutex);
 161         return result;
 162 }
 163
 164 int ps3_open_hv_device(struct ps3_system_bus_device *dev)
 165 {
 166         BUG_ON(!dev);
 167         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
 168
 169         switch (dev->match_id) {
 170         case PS3_MATCH_ID_EHCI:
 171         case PS3_MATCH_ID_OHCI:
 172         case PS3_MATCH_ID_GELIC:
 173         case PS3_MATCH_ID_STOR_DISK:
 174         case PS3_MATCH_ID_STOR_ROM:
 175         case PS3_MATCH_ID_STOR_FLASH:
 176                 return ps3_open_hv_device_sb(dev);
 177
 178         case PS3_MATCH_ID_SOUND:
 179         case PS3_MATCH_ID_GPU:
 180                 return ps3_open_hv_device_gpu(dev);
 181
 182         case PS3_MATCH_ID_AV_SETTINGS:
 183         case PS3_MATCH_ID_SYSTEM_MANAGER:
 184                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
 185                         __LINE__, dev->match_id);
 186                 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
 187                         dev->bus_id);
 188                 BUG();
 189                 return -EINVAL;
 190
 191         default:
 192                 break;
 193         }
 194
 195         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
 196                 dev->match_id);
 197         BUG();
 198         return -ENODEV;
 199 }
 200 EXPORT_SYMBOL_GPL(ps3_open_hv_device);
 201
 202 int ps3_close_hv_device(struct ps3_system_bus_device *dev)
 203 {
 204         BUG_ON(!dev);
 205         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
 206
 207         switch (dev->match_id) {
 208         case PS3_MATCH_ID_EHCI:
 209         case PS3_MATCH_ID_OHCI:
 210         case PS3_MATCH_ID_GELIC:
 211         case PS3_MATCH_ID_STOR_DISK:
 212         case PS3_MATCH_ID_STOR_ROM:
 213         case PS3_MATCH_ID_STOR_FLASH:
 214                 return ps3_close_hv_device_sb(dev);
 215
 216         case PS3_MATCH_ID_SOUND:
 217         case PS3_MATCH_ID_GPU:
 218                 return ps3_close_hv_device_gpu(dev);
 219
 220         case PS3_MATCH_ID_AV_SETTINGS:
 221         case PS3_MATCH_ID_SYSTEM_MANAGER:
 222                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
 223                         __LINE__, dev->match_id);
 224                 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
 225                         dev->bus_id);
 226                 BUG();
 227                 return -EINVAL;
 228
 229         default:
 230                 break;
 231         }
 232
 233         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
 234                 dev->match_id);
 235         BUG();
 236         return -ENODEV;
 237 }
 238 EXPORT_SYMBOL_GPL(ps3_close_hv_device);
 239
 240 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
 241 static void _dump_mmio_region(const struct ps3_mmio_region* r,
 242         const char* func, int line)
 243 {
 244         pr_debug("%s:%d: dev       %llu:%llu\n", func, line, r->dev->bus_id,
 245                 r->dev->dev_id);
 246         pr_debug("%s:%d: bus_addr  %lxh\n", func, line, r->bus_addr);
 247         pr_debug("%s:%d: len       %lxh\n", func, line, r->len);
 248         pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
 249 }
 250
 251 static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
 252 {
 253         int result;
 254         u64 lpar_addr;
 255
 256         result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
 257                 r->bus_addr, r->len, r->page_size, &lpar_addr);
 258         r->lpar_addr = lpar_addr;
 259
 260         if (result) {
 261                 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
 262                         __func__, __LINE__, ps3_result(result));
 263                 r->lpar_addr = 0;
 264         }
 265
 266         dump_mmio_region(r);
 267         return result;
 268 }
 269
 270 static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
 271 {
 272         /* device specific; do nothing currently */
 273         return 0;
 274 }
 275
 276 int ps3_mmio_region_create(struct ps3_mmio_region *r)
 277 {
 278         return r->mmio_ops->create(r);
 279 }
 280 EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
 281
 282 static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
 283 {
 284         int result;
 285
 286         dump_mmio_region(r);
 287         result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
 288                 r->lpar_addr);
 289
 290         if (result)
 291                 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
 292                         __func__, __LINE__, ps3_result(result));
 293
 294         r->lpar_addr = 0;
 295         return result;
 296 }
 297
 298 static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
 299 {
 300         /* device specific; do nothing currently */
 301         return 0;
 302 }
 303
 304
 305 int ps3_free_mmio_region(struct ps3_mmio_region *r)
 306 {
 307         return r->mmio_ops->free(r);
 308 }
 309
 310 EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
 311
 312 static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
 313         .create = ps3_sb_mmio_region_create,
 314         .free = ps3_sb_free_mmio_region
 315 };
 316
 317 static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
 318         .create = ps3_ioc0_mmio_region_create,
 319         .free = ps3_ioc0_free_mmio_region
 320 };
 321
 322 int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
 323         struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
 324         enum ps3_mmio_page_size page_size)
 325 {
 326         r->dev = dev;
 327         r->bus_addr = bus_addr;
 328         r->len = len;
 329         r->page_size = page_size;
 330         switch (dev->dev_type) {
 331         case PS3_DEVICE_TYPE_SB:
 332                 r->mmio_ops = &ps3_mmio_sb_region_ops;
 333                 break;
 334         case PS3_DEVICE_TYPE_IOC0:
 335                 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
 336                 break;
 337         default:
 338                 BUG();
 339                 return -EINVAL;
 340         }
 341         return 0;
 342 }
 343 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
 344
 345 static int ps3_system_bus_match(struct device *_dev,
 346         struct device_driver *_drv)
 347 {
 348         int result;
 349         struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
 350         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 351
 352         if (!dev->match_sub_id)
 353                 result = dev->match_id == drv->match_id;
 354         else
 355                 result = dev->match_sub_id == drv->match_sub_id &&
 356                         dev->match_id == drv->match_id;
 357
 358         if (result)
 359                 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
 360                         __func__, __LINE__,
 361                         dev->match_id, dev->match_sub_id, dev_name(&dev->core),
 362                         drv->match_id, drv->match_sub_id, drv->core.name);
 363         else
 364                 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
 365                         __func__, __LINE__,
 366                         dev->match_id, dev->match_sub_id, dev_name(&dev->core),
 367                         drv->match_id, drv->match_sub_id, drv->core.name);
 368
 369         return result;
 370 }
 371
 372 static int ps3_system_bus_probe(struct device *_dev)
 373 {
 374         int result = 0;
 375         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 376         struct ps3_system_bus_driver *drv;
 377
 378         BUG_ON(!dev);
 379         dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
 380
 381         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 382         BUG_ON(!drv);
 383
 384         if (drv->probe)
 385                 result = drv->probe(dev);
 386         else
 387                 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
 388                         dev_name(&dev->core));
 389
 390         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
 391         return result;
 392 }
 393
 394 static int ps3_system_bus_remove(struct device *_dev)
 395 {
 396         int result = 0;
 397         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 398         struct ps3_system_bus_driver *drv;
 399
 400         BUG_ON(!dev);
 401         dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
 402
 403         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 404         BUG_ON(!drv);
 405
 406         if (drv->remove)
 407                 result = drv->remove(dev);
 408         else
 409                 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
 410                         __func__, __LINE__, drv->core.name);
 411
 412         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
 413         return result;
 414 }
 415
 416 static void ps3_system_bus_shutdown(struct device *_dev)
 417 {
 418         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 419         struct ps3_system_bus_driver *drv;
 420
 421         BUG_ON(!dev);
 422
 423         dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
 424                 dev->match_id);
 425
 426         if (!dev->core.driver) {
 427                 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
 428                         __LINE__);
 429                 return;
 430         }
 431
 432         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 433
 434         BUG_ON(!drv);
 435
 436         dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
 437                 dev_name(&dev->core), drv->core.name);
 438
 439         if (drv->shutdown)
 440                 drv->shutdown(dev);
 441         else if (drv->remove) {
 442                 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
 443                         __func__, __LINE__, drv->core.name);
 444                 drv->remove(dev);
 445         } else {
 446                 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
 447                         __func__, __LINE__, drv->core.name);
 448                 BUG();
 449         }
 450
 451         dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
 452 }
 453
 454 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
 455 {
 456         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 457
 458         if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
 459                            dev->match_sub_id))
 460                 return -ENOMEM;
 461         return 0;
 462 }
 463
 464 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
 465         char *buf)
 466 {
 467         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 468         int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
 469                            dev->match_sub_id);
 470
 471         return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
 472 }
 473
 474 static struct device_attribute ps3_system_bus_dev_attrs[] = {
 475         __ATTR_RO(modalias),
 476         __ATTR_NULL,
 477 };
 478
 479 struct bus_type ps3_system_bus_type = {
 480         .name = "ps3_system_bus",
 481         .match = ps3_system_bus_match,
 482         .uevent = ps3_system_bus_uevent,
 483         .probe = ps3_system_bus_probe,
 484         .remove = ps3_system_bus_remove,
 485         .shutdown = ps3_system_bus_shutdown,
 486         .dev_attrs = ps3_system_bus_dev_attrs,
 487 };
 488
 489 static int __init ps3_system_bus_init(void)
 490 {
 491         int result;
 492
 493         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 494                 return -ENODEV;
 495
 496         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 497
 498         mutex_init(&usage_hack.mutex);
 499
 500         result = device_register(&ps3_system_bus);
 501         BUG_ON(result);
 502
 503         result = bus_register(&ps3_system_bus_type);
 504         BUG_ON(result);
 505
 506         pr_debug(" <- %s:%d\n", __func__, __LINE__);
 507         return result;
 508 }
 509
 510 core_initcall(ps3_system_bus_init);
 511
 512 /* Allocates a contiguous real buffer and creates mappings over it.
 513  * Returns the virtual address of the buffer and sets dma_handle
 514  * to the dma address (mapping) of the first page.
 515  */
 516 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
 517                                       dma_addr_t *dma_handle, gfp_t flag)
 518 {
 519         int result;
 520         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 521         unsigned long virt_addr;
 522
 523         flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
 524         flag |= __GFP_ZERO;
 525
 526         virt_addr = __get_free_pages(flag, get_order(size));
 527
 528         if (!virt_addr) {
 529                 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
 530                 goto clean_none;
 531         }
 532
 533         result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
 534                              CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 535                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
 536
 537         if (result) {
 538                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 539                         __func__, __LINE__, result);
 540                 BUG_ON("check region type");
 541                 goto clean_alloc;
 542         }
 543
 544         return (void*)virt_addr;
 545
 546 clean_alloc:
 547         free_pages(virt_addr, get_order(size));
 548 clean_none:
 549         dma_handle = NULL;
 550         return NULL;
 551 }
 552
 553 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
 554         dma_addr_t dma_handle)
 555 {
 556         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 557
 558         ps3_dma_unmap(dev->d_region, dma_handle, size);
 559         free_pages((unsigned long)vaddr, get_order(size));
 560 }
 561
 562 /* Creates TCEs for a user provided buffer.  The user buffer must be
 563  * contiguous real kernel storage (not vmalloc).  The address passed here
 564  * comprises a page address and offset into that page. The dma_addr_t
 565  * returned will point to the same byte within the page as was passed in.
 566  */
 567
 568 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
 569         unsigned long offset, size_t size, enum dma_data_direction direction,
 570         struct dma_attrs *attrs)
 571 {
 572         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 573         int result;
 574         dma_addr_t bus_addr;
 575         void *ptr = page_address(page) + offset;
 576
 577         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 578                              &bus_addr,
 579                              CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
 580                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
 581
 582         if (result) {
 583                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 584                         __func__, __LINE__, result);
 585         }
 586
 587         return bus_addr;
 588 }
 589
 590 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
 591                                     unsigned long offset, size_t size,
 592                                     enum dma_data_direction direction,
 593                                     struct dma_attrs *attrs)
 594 {
 595         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 596         int result;
 597         dma_addr_t bus_addr;
 598         u64 iopte_flag;
 599         void *ptr = page_address(page) + offset;
 600
 601         iopte_flag = CBE_IOPTE_M;
 602         switch (direction) {
 603         case DMA_BIDIRECTIONAL:
 604                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
 605                 break;
 606         case DMA_TO_DEVICE:
 607                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
 608                 break;
 609         case DMA_FROM_DEVICE:
 610                 iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
 611                 break;
 612         default:
 613                 /* not happned */
 614                 BUG();
 615         };
 616         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 617                              &bus_addr, iopte_flag);
 618
 619         if (result) {
 620                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 621                         __func__, __LINE__, result);
 622         }
 623         return bus_addr;
 624 }
 625
 626 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
 627         size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
 628 {
 629         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 630         int result;
 631
 632         result = ps3_dma_unmap(dev->d_region, dma_addr, size);
 633
 634         if (result) {
 635                 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
 636                         __func__, __LINE__, result);
 637         }
 638 }
 639
 640 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
 641         int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
 642 {
 643 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 644         BUG_ON("do");
 645         return -EPERM;
 646 #else
 647         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 648         struct scatterlist *sg;
 649         int i;
 650
 651         for_each_sg(sgl, sg, nents, i) {
 652                 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
 653                                         sg->length, &sg->dma_address, 0);
 654
 655                 if (result) {
 656                         pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 657                                 __func__, __LINE__, result);
 658                         return -EINVAL;
 659                 }
 660
 661                 sg->dma_length = sg->length;
 662         }
 663
 664         return nents;
 665 #endif
 666 }
 667
 668 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
 669                            int nents,
 670                            enum dma_data_direction direction,
 671                            struct dma_attrs *attrs)
 672 {
 673         BUG();
 674         return 0;
 675 }
 676
 677 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
 678         int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
 679 {
 680 #if defined(CONFIG_PS3_DYNAMIC_DMA)
 681         BUG_ON("do");
 682 #endif
 683 }
 684
 685 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
 686                             int nents, enum dma_data_direction direction,
 687                             struct dma_attrs *attrs)
 688 {
 689         BUG();
 690 }
 691
 692 static int ps3_dma_supported(struct device *_dev, u64 mask)
 693 {
 694         return mask >= DMA_BIT_MASK(32);
 695 }
 696
 697 static struct dma_map_ops ps3_sb_dma_ops = {
 698         .alloc_coherent = ps3_alloc_coherent,
 699         .free_coherent = ps3_free_coherent,
 700         .map_sg = ps3_sb_map_sg,
 701         .unmap_sg = ps3_sb_unmap_sg,
 702         .dma_supported = ps3_dma_supported,
 703         .map_page = ps3_sb_map_page,
 704         .unmap_page = ps3_unmap_page,
 705 };
 706
 707 static struct dma_map_ops ps3_ioc0_dma_ops = {
 708         .alloc_coherent = ps3_alloc_coherent,
 709         .free_coherent = ps3_free_coherent,
 710         .map_sg = ps3_ioc0_map_sg,
 711         .unmap_sg = ps3_ioc0_unmap_sg,
 712         .dma_supported = ps3_dma_supported,
 713         .map_page = ps3_ioc0_map_page,
 714         .unmap_page = ps3_unmap_page,
 715 };
 716
 717 /**
 718  * ps3_system_bus_release_device - remove a device from the system bus
 719  */
 720
 721 static void ps3_system_bus_release_device(struct device *_dev)
 722 {
 723         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 724         kfree(dev);
 725 }
 726
 727 /**
 728  * ps3_system_bus_device_register - add a device to the system bus
 729  *
 730  * ps3_system_bus_device_register() expects the dev object to be allocated
 731  * dynamically by the caller.  The system bus takes ownership of the dev
 732  * object and frees the object in ps3_system_bus_release_device().
 733  */
 734
 735 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
 736 {
 737         int result;
 738         static unsigned int dev_ioc0_count;
 739         static unsigned int dev_sb_count;
 740         static unsigned int dev_vuart_count;
 741         static unsigned int dev_lpm_count;
 742
 743         if (!dev->core.parent)
 744                 dev->core.parent = &ps3_system_bus;
 745         dev->core.bus = &ps3_system_bus_type;
 746         dev->core.release = ps3_system_bus_release_device;
 747
 748         switch (dev->dev_type) {
 749         case PS3_DEVICE_TYPE_IOC0:
 750                 dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
 751                 dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
 752                 break;
 753         case PS3_DEVICE_TYPE_SB:
 754                 dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
 755                 dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
 756
 757                 break;
 758         case PS3_DEVICE_TYPE_VUART:
 759                 dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
 760                 break;
 761         case PS3_DEVICE_TYPE_LPM:
 762                 dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
 763                 break;
 764         default:
 765                 BUG();
 766         };
 767
 768         dev->core.of_node = NULL;
 769         set_dev_node(&dev->core, 0);
 770
 771         pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
 772
 773         result = device_register(&dev->core);
 774         return result;
 775 }
 776
 777 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
 778
 779 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
 780 {
 781         int result;
 782
 783         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 784
 785         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 786                 return -ENODEV;
 787
 788         drv->core.bus = &ps3_system_bus_type;
 789
 790         result = driver_register(&drv->core);
 791         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 792         return result;
 793 }
 794
 795 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
 796
 797 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
 798 {
 799         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 800         driver_unregister(&drv->core);
 801         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
 802 }
 803
 804 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);