linux/arch/powerpc/platforms/ps3/system-bus.c
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   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
  23static struct device ps3_system_bus = {
  24        .init_name = "ps3_system",
  25};
  26
  27/* FIXME: need device usage counters! */
  28static struct {
  29        struct mutex mutex;
  30        int sb_11; /* usb 0 */
  31        int sb_12; /* usb 0 */
  32        int gpu;
  33} usage_hack;
  34
  35static 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
  41static 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
  73done:
  74        mutex_unlock(&usage_hack.mutex);
  75        return result;
  76}
  77
  78static 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
 104done:
 105        mutex_unlock(&usage_hack.mutex);
 106        return result;
 107}
 108
 109static 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
 129done:
 130        mutex_unlock(&usage_hack.mutex);
 131        return result;
 132}
 133
 134static 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
 149done:
 150        mutex_unlock(&usage_hack.mutex);
 151        return result;
 152}
 153
 154int 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}
 190EXPORT_SYMBOL_GPL(ps3_open_hv_device);
 191
 192int 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}
 228EXPORT_SYMBOL_GPL(ps3_close_hv_device);
 229
 230#define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
 231static 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
 241static 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
 260static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
 261{
 262        /* device specific; do nothing currently */
 263        return 0;
 264}
 265
 266int ps3_mmio_region_create(struct ps3_mmio_region *r)
 267{
 268        return r->mmio_ops->create(r);
 269}
 270EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
 271
 272static 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
 288static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
 289{
 290        /* device specific; do nothing currently */
 291        return 0;
 292}
 293
 294
 295int ps3_free_mmio_region(struct ps3_mmio_region *r)
 296{
 297        return r->mmio_ops->free(r);
 298}
 299
 300EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
 301
 302static 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
 307static 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
 312int 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}
 333EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
 334
 335static 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
 362static 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
 384static int 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        return 0;
 403}
 404
 405static void ps3_system_bus_shutdown(struct device *_dev)
 406{
 407        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 408        struct ps3_system_bus_driver *drv;
 409
 410        BUG_ON(!dev);
 411
 412        dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
 413                dev->match_id);
 414
 415        if (!dev->core.driver) {
 416                dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
 417                        __LINE__);
 418                return;
 419        }
 420
 421        drv = ps3_system_bus_dev_to_system_bus_drv(dev);
 422
 423        BUG_ON(!drv);
 424
 425        dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
 426                dev_name(&dev->core), drv->core.name);
 427
 428        if (drv->shutdown)
 429                drv->shutdown(dev);
 430        else if (drv->remove) {
 431                dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
 432                        __func__, __LINE__, drv->core.name);
 433                drv->remove(dev);
 434        } else {
 435                dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
 436                        __func__, __LINE__, drv->core.name);
 437                BUG();
 438        }
 439
 440        dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
 441}
 442
 443static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
 444{
 445        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 446
 447        if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
 448                           dev->match_sub_id))
 449                return -ENOMEM;
 450        return 0;
 451}
 452
 453static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
 454        char *buf)
 455{
 456        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 457        int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
 458                           dev->match_sub_id);
 459
 460        return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
 461}
 462static DEVICE_ATTR_RO(modalias);
 463
 464static struct attribute *ps3_system_bus_dev_attrs[] = {
 465        &dev_attr_modalias.attr,
 466        NULL,
 467};
 468ATTRIBUTE_GROUPS(ps3_system_bus_dev);
 469
 470struct bus_type ps3_system_bus_type = {
 471        .name = "ps3_system_bus",
 472        .match = ps3_system_bus_match,
 473        .uevent = ps3_system_bus_uevent,
 474        .probe = ps3_system_bus_probe,
 475        .remove = ps3_system_bus_remove,
 476        .shutdown = ps3_system_bus_shutdown,
 477        .dev_groups = ps3_system_bus_dev_groups,
 478};
 479
 480static int __init ps3_system_bus_init(void)
 481{
 482        int result;
 483
 484        if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 485                return -ENODEV;
 486
 487        pr_debug(" -> %s:%d\n", __func__, __LINE__);
 488
 489        mutex_init(&usage_hack.mutex);
 490
 491        result = device_register(&ps3_system_bus);
 492        BUG_ON(result);
 493
 494        result = bus_register(&ps3_system_bus_type);
 495        BUG_ON(result);
 496
 497        pr_debug(" <- %s:%d\n", __func__, __LINE__);
 498        return result;
 499}
 500
 501core_initcall(ps3_system_bus_init);
 502
 503/* Allocates a contiguous real buffer and creates mappings over it.
 504 * Returns the virtual address of the buffer and sets dma_handle
 505 * to the dma address (mapping) of the first page.
 506 */
 507static void * ps3_alloc_coherent(struct device *_dev, size_t size,
 508                                 dma_addr_t *dma_handle, gfp_t flag,
 509                                 unsigned long attrs)
 510{
 511        int result;
 512        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 513        unsigned long virt_addr;
 514
 515        flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
 516        flag |= __GFP_ZERO;
 517
 518        virt_addr = __get_free_pages(flag, get_order(size));
 519
 520        if (!virt_addr) {
 521                pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
 522                goto clean_none;
 523        }
 524
 525        result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
 526                             CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 527                             CBE_IOPTE_SO_RW | CBE_IOPTE_M);
 528
 529        if (result) {
 530                pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 531                        __func__, __LINE__, result);
 532                BUG_ON("check region type");
 533                goto clean_alloc;
 534        }
 535
 536        return (void*)virt_addr;
 537
 538clean_alloc:
 539        free_pages(virt_addr, get_order(size));
 540clean_none:
 541        dma_handle = NULL;
 542        return NULL;
 543}
 544
 545static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
 546                              dma_addr_t dma_handle, unsigned long attrs)
 547{
 548        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 549
 550        ps3_dma_unmap(dev->d_region, dma_handle, size);
 551        free_pages((unsigned long)vaddr, get_order(size));
 552}
 553
 554/* Creates TCEs for a user provided buffer.  The user buffer must be
 555 * contiguous real kernel storage (not vmalloc).  The address passed here
 556 * comprises a page address and offset into that page. The dma_addr_t
 557 * returned will point to the same byte within the page as was passed in.
 558 */
 559
 560static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
 561        unsigned long offset, size_t size, enum dma_data_direction direction,
 562        unsigned long attrs)
 563{
 564        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 565        int result;
 566        dma_addr_t bus_addr;
 567        void *ptr = page_address(page) + offset;
 568
 569        result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 570                             &bus_addr,
 571                             CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
 572                             CBE_IOPTE_SO_RW | CBE_IOPTE_M);
 573
 574        if (result) {
 575                pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 576                        __func__, __LINE__, result);
 577        }
 578
 579        return bus_addr;
 580}
 581
 582static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
 583                                    unsigned long offset, size_t size,
 584                                    enum dma_data_direction direction,
 585                                    unsigned long attrs)
 586{
 587        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 588        int result;
 589        dma_addr_t bus_addr;
 590        u64 iopte_flag;
 591        void *ptr = page_address(page) + offset;
 592
 593        iopte_flag = CBE_IOPTE_M;
 594        switch (direction) {
 595        case DMA_BIDIRECTIONAL:
 596                iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
 597                break;
 598        case DMA_TO_DEVICE:
 599                iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
 600                break;
 601        case DMA_FROM_DEVICE:
 602                iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
 603                break;
 604        default:
 605                /* not happned */
 606                BUG();
 607        };
 608        result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
 609                             &bus_addr, iopte_flag);
 610
 611        if (result) {
 612                pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 613                        __func__, __LINE__, result);
 614        }
 615        return bus_addr;
 616}
 617
 618static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
 619        size_t size, enum dma_data_direction direction, unsigned long attrs)
 620{
 621        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 622        int result;
 623
 624        result = ps3_dma_unmap(dev->d_region, dma_addr, size);
 625
 626        if (result) {
 627                pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
 628                        __func__, __LINE__, result);
 629        }
 630}
 631
 632static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
 633        int nents, enum dma_data_direction direction, unsigned long attrs)
 634{
 635#if defined(CONFIG_PS3_DYNAMIC_DMA)
 636        BUG_ON("do");
 637        return -EPERM;
 638#else
 639        struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 640        struct scatterlist *sg;
 641        int i;
 642
 643        for_each_sg(sgl, sg, nents, i) {
 644                int result = ps3_dma_map(dev->d_region, sg_phys(sg),
 645                                        sg->length, &sg->dma_address, 0);
 646
 647                if (result) {
 648                        pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
 649                                __func__, __LINE__, result);
 650                        return -EINVAL;
 651                }
 652
 653                sg->dma_length = sg->length;
 654        }
 655
 656        return nents;
 657#endif
 658}
 659
 660static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
 661                           int nents,
 662                           enum dma_data_direction direction,
 663                           unsigned long attrs)
 664{
 665        BUG();
 666        return 0;
 667}
 668
 669static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
 670        int nents, enum dma_data_direction direction, unsigned long attrs)
 671{
 672#if defined(CONFIG_PS3_DYNAMIC_DMA)
 673        BUG_ON("do");
 674#endif
 675}
 676
 677static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
 678                            int nents, enum dma_data_direction direction,
 679                            unsigned long attrs)
 680{
 681        BUG();
 682}
 683
 684static int ps3_dma_supported(struct device *_dev, u64 mask)
 685{
 686        return mask >= DMA_BIT_MASK(32);
 687}
 688
 689static const struct dma_map_ops ps3_sb_dma_ops = {
 690        .alloc = ps3_alloc_coherent,
 691        .free = ps3_free_coherent,
 692        .map_sg = ps3_sb_map_sg,
 693        .unmap_sg = ps3_sb_unmap_sg,
 694        .dma_supported = ps3_dma_supported,
 695        .map_page = ps3_sb_map_page,
 696        .unmap_page = ps3_unmap_page,
 697        .mmap = dma_common_mmap,
 698        .get_sgtable = dma_common_get_sgtable,
 699        .alloc_pages = dma_common_alloc_pages,
 700        .free_pages = dma_common_free_pages,
 701};
 702
 703static const struct dma_map_ops ps3_ioc0_dma_ops = {
 704        .alloc = ps3_alloc_coherent,
 705        .free = ps3_free_coherent,
 706        .map_sg = ps3_ioc0_map_sg,
 707        .unmap_sg = ps3_ioc0_unmap_sg,
 708        .dma_supported = ps3_dma_supported,
 709        .map_page = ps3_ioc0_map_page,
 710        .unmap_page = ps3_unmap_page,
 711        .mmap = dma_common_mmap,
 712        .get_sgtable = dma_common_get_sgtable,
 713        .alloc_pages = dma_common_alloc_pages,
 714        .free_pages = dma_common_free_pages,
 715};
 716
 717/**
 718 * ps3_system_bus_release_device - remove a device from the system bus
 719 */
 720
 721static 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
 735int 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.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.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
 777EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
 778
 779int 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
 795EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
 796
 797void 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
 804EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
 805