qemu/hw/ppc/spapr_iommu.c
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   1/*
   2 * QEMU sPAPR IOMMU (TCE) code
   3 *
   4 * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2.1 of the License, or (at your option) any later version.
  10 *
  11 * This library 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 GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include "qemu/osdep.h"
  21#include "qemu/error-report.h"
  22#include "qemu/log.h"
  23#include "qemu/module.h"
  24#include "sysemu/kvm.h"
  25#include "kvm_ppc.h"
  26#include "migration/vmstate.h"
  27#include "sysemu/dma.h"
  28#include "trace.h"
  29
  30#include "hw/ppc/spapr.h"
  31#include "hw/ppc/spapr_vio.h"
  32
  33#include <libfdt.h>
  34
  35enum SpaprTceAccess {
  36    SPAPR_TCE_FAULT = 0,
  37    SPAPR_TCE_RO = 1,
  38    SPAPR_TCE_WO = 2,
  39    SPAPR_TCE_RW = 3,
  40};
  41
  42#define IOMMU_PAGE_SIZE(shift)      (1ULL << (shift))
  43#define IOMMU_PAGE_MASK(shift)      (~(IOMMU_PAGE_SIZE(shift) - 1))
  44
  45static QLIST_HEAD(, SpaprTceTable) spapr_tce_tables;
  46
  47SpaprTceTable *spapr_tce_find_by_liobn(target_ulong liobn)
  48{
  49    SpaprTceTable *tcet;
  50
  51    if (liobn & 0xFFFFFFFF00000000ULL) {
  52        hcall_dprintf("Request for out-of-bounds LIOBN 0x" TARGET_FMT_lx "\n",
  53                      liobn);
  54        return NULL;
  55    }
  56
  57    QLIST_FOREACH(tcet, &spapr_tce_tables, list) {
  58        if (tcet->liobn == (uint32_t)liobn) {
  59            return tcet;
  60        }
  61    }
  62
  63    return NULL;
  64}
  65
  66static IOMMUAccessFlags spapr_tce_iommu_access_flags(uint64_t tce)
  67{
  68    switch (tce & SPAPR_TCE_RW) {
  69    case SPAPR_TCE_FAULT:
  70        return IOMMU_NONE;
  71    case SPAPR_TCE_RO:
  72        return IOMMU_RO;
  73    case SPAPR_TCE_WO:
  74        return IOMMU_WO;
  75    default: /* SPAPR_TCE_RW */
  76        return IOMMU_RW;
  77    }
  78}
  79
  80static uint64_t *spapr_tce_alloc_table(uint32_t liobn,
  81                                       uint32_t page_shift,
  82                                       uint64_t bus_offset,
  83                                       uint32_t nb_table,
  84                                       int *fd,
  85                                       bool need_vfio)
  86{
  87    uint64_t *table = NULL;
  88
  89    if (kvm_enabled()) {
  90        table = kvmppc_create_spapr_tce(liobn, page_shift, bus_offset, nb_table,
  91                                        fd, need_vfio);
  92    }
  93
  94    if (!table) {
  95        *fd = -1;
  96        table = g_new0(uint64_t, nb_table);
  97    }
  98
  99    trace_spapr_iommu_new_table(liobn, table, *fd);
 100
 101    return table;
 102}
 103
 104static void spapr_tce_free_table(uint64_t *table, int fd, uint32_t nb_table)
 105{
 106    if (!kvm_enabled() ||
 107        (kvmppc_remove_spapr_tce(table, fd, nb_table) != 0)) {
 108        g_free(table);
 109    }
 110}
 111
 112/* Called from RCU critical section */
 113static IOMMUTLBEntry spapr_tce_translate_iommu(IOMMUMemoryRegion *iommu,
 114                                               hwaddr addr,
 115                                               IOMMUAccessFlags flag,
 116                                               int iommu_idx)
 117{
 118    SpaprTceTable *tcet = container_of(iommu, SpaprTceTable, iommu);
 119    uint64_t tce;
 120    IOMMUTLBEntry ret = {
 121        .target_as = &address_space_memory,
 122        .iova = 0,
 123        .translated_addr = 0,
 124        .addr_mask = ~(hwaddr)0,
 125        .perm = IOMMU_NONE,
 126    };
 127
 128    if ((addr >> tcet->page_shift) < tcet->nb_table) {
 129        /* Check if we are in bound */
 130        hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
 131
 132        tce = tcet->table[addr >> tcet->page_shift];
 133        ret.iova = addr & page_mask;
 134        ret.translated_addr = tce & page_mask;
 135        ret.addr_mask = ~page_mask;
 136        ret.perm = spapr_tce_iommu_access_flags(tce);
 137    }
 138    trace_spapr_iommu_xlate(tcet->liobn, addr, ret.translated_addr, ret.perm,
 139                            ret.addr_mask);
 140
 141    return ret;
 142}
 143
 144static void spapr_tce_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
 145{
 146    MemoryRegion *mr = MEMORY_REGION(iommu_mr);
 147    IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
 148    hwaddr addr, granularity;
 149    IOMMUTLBEntry iotlb;
 150    SpaprTceTable *tcet = container_of(iommu_mr, SpaprTceTable, iommu);
 151
 152    if (tcet->skipping_replay) {
 153        return;
 154    }
 155
 156    granularity = memory_region_iommu_get_min_page_size(iommu_mr);
 157
 158    for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
 159        iotlb = imrc->translate(iommu_mr, addr, IOMMU_NONE, n->iommu_idx);
 160        if (iotlb.perm != IOMMU_NONE) {
 161            n->notify(n, &iotlb);
 162        }
 163
 164        /*
 165         * if (2^64 - MR size) < granularity, it's possible to get an
 166         * infinite loop here.  This should catch such a wraparound.
 167         */
 168        if ((addr + granularity) < addr) {
 169            break;
 170        }
 171    }
 172}
 173
 174static int spapr_tce_table_pre_save(void *opaque)
 175{
 176    SpaprTceTable *tcet = SPAPR_TCE_TABLE(opaque);
 177
 178    tcet->mig_table = tcet->table;
 179    tcet->mig_nb_table = tcet->nb_table;
 180
 181    trace_spapr_iommu_pre_save(tcet->liobn, tcet->mig_nb_table,
 182                               tcet->bus_offset, tcet->page_shift);
 183
 184    return 0;
 185}
 186
 187static uint64_t spapr_tce_get_min_page_size(IOMMUMemoryRegion *iommu)
 188{
 189    SpaprTceTable *tcet = container_of(iommu, SpaprTceTable, iommu);
 190
 191    return 1ULL << tcet->page_shift;
 192}
 193
 194static int spapr_tce_get_attr(IOMMUMemoryRegion *iommu,
 195                              enum IOMMUMemoryRegionAttr attr, void *data)
 196{
 197    SpaprTceTable *tcet = container_of(iommu, SpaprTceTable, iommu);
 198
 199    if (attr == IOMMU_ATTR_SPAPR_TCE_FD && kvmppc_has_cap_spapr_vfio()) {
 200        *(int *) data = tcet->fd;
 201        return 0;
 202    }
 203
 204    return -EINVAL;
 205}
 206
 207static int spapr_tce_notify_flag_changed(IOMMUMemoryRegion *iommu,
 208                                         IOMMUNotifierFlag old,
 209                                         IOMMUNotifierFlag new,
 210                                         Error **errp)
 211{
 212    struct SpaprTceTable *tbl = container_of(iommu, SpaprTceTable, iommu);
 213
 214    if (new & IOMMU_NOTIFIER_DEVIOTLB_UNMAP) {
 215        error_setg(errp, "spart_tce does not support dev-iotlb yet");
 216        return -EINVAL;
 217    }
 218
 219    if (old == IOMMU_NOTIFIER_NONE && new != IOMMU_NOTIFIER_NONE) {
 220        spapr_tce_set_need_vfio(tbl, true);
 221    } else if (old != IOMMU_NOTIFIER_NONE && new == IOMMU_NOTIFIER_NONE) {
 222        spapr_tce_set_need_vfio(tbl, false);
 223    }
 224    return 0;
 225}
 226
 227static int spapr_tce_table_post_load(void *opaque, int version_id)
 228{
 229    SpaprTceTable *tcet = SPAPR_TCE_TABLE(opaque);
 230    uint32_t old_nb_table = tcet->nb_table;
 231    uint64_t old_bus_offset = tcet->bus_offset;
 232    uint32_t old_page_shift = tcet->page_shift;
 233
 234    if (tcet->vdev) {
 235        spapr_vio_set_bypass(tcet->vdev, tcet->bypass);
 236    }
 237
 238    if (tcet->mig_nb_table != tcet->nb_table) {
 239        spapr_tce_table_disable(tcet);
 240    }
 241
 242    if (tcet->mig_nb_table) {
 243        if (!tcet->nb_table) {
 244            spapr_tce_table_enable(tcet, old_page_shift, old_bus_offset,
 245                                   tcet->mig_nb_table);
 246        }
 247
 248        memcpy(tcet->table, tcet->mig_table,
 249               tcet->nb_table * sizeof(tcet->table[0]));
 250
 251        free(tcet->mig_table);
 252        tcet->mig_table = NULL;
 253    }
 254
 255    trace_spapr_iommu_post_load(tcet->liobn, old_nb_table, tcet->nb_table,
 256                                tcet->bus_offset, tcet->page_shift);
 257
 258    return 0;
 259}
 260
 261static bool spapr_tce_table_ex_needed(void *opaque)
 262{
 263    SpaprTceTable *tcet = opaque;
 264
 265    return tcet->bus_offset || tcet->page_shift != 0xC;
 266}
 267
 268static const VMStateDescription vmstate_spapr_tce_table_ex = {
 269    .name = "spapr_iommu_ex",
 270    .version_id = 1,
 271    .minimum_version_id = 1,
 272    .needed = spapr_tce_table_ex_needed,
 273    .fields = (VMStateField[]) {
 274        VMSTATE_UINT64(bus_offset, SpaprTceTable),
 275        VMSTATE_UINT32(page_shift, SpaprTceTable),
 276        VMSTATE_END_OF_LIST()
 277    },
 278};
 279
 280static const VMStateDescription vmstate_spapr_tce_table = {
 281    .name = "spapr_iommu",
 282    .version_id = 2,
 283    .minimum_version_id = 2,
 284    .pre_save = spapr_tce_table_pre_save,
 285    .post_load = spapr_tce_table_post_load,
 286    .fields      = (VMStateField []) {
 287        /* Sanity check */
 288        VMSTATE_UINT32_EQUAL(liobn, SpaprTceTable, NULL),
 289
 290        /* IOMMU state */
 291        VMSTATE_UINT32(mig_nb_table, SpaprTceTable),
 292        VMSTATE_BOOL(bypass, SpaprTceTable),
 293        VMSTATE_VARRAY_UINT32_ALLOC(mig_table, SpaprTceTable, mig_nb_table, 0,
 294                                    vmstate_info_uint64, uint64_t),
 295
 296        VMSTATE_END_OF_LIST()
 297    },
 298    .subsections = (const VMStateDescription*[]) {
 299        &vmstate_spapr_tce_table_ex,
 300        NULL
 301    }
 302};
 303
 304static void spapr_tce_table_realize(DeviceState *dev, Error **errp)
 305{
 306    SpaprTceTable *tcet = SPAPR_TCE_TABLE(dev);
 307    Object *tcetobj = OBJECT(tcet);
 308    gchar *tmp;
 309
 310    tcet->fd = -1;
 311    tcet->need_vfio = false;
 312    tmp = g_strdup_printf("tce-root-%x", tcet->liobn);
 313    memory_region_init(&tcet->root, tcetobj, tmp, UINT64_MAX);
 314    g_free(tmp);
 315
 316    tmp = g_strdup_printf("tce-iommu-%x", tcet->liobn);
 317    memory_region_init_iommu(&tcet->iommu, sizeof(tcet->iommu),
 318                             TYPE_SPAPR_IOMMU_MEMORY_REGION,
 319                             tcetobj, tmp, 0);
 320    g_free(tmp);
 321
 322    QLIST_INSERT_HEAD(&spapr_tce_tables, tcet, list);
 323
 324    vmstate_register(VMSTATE_IF(tcet), tcet->liobn, &vmstate_spapr_tce_table,
 325                     tcet);
 326}
 327
 328void spapr_tce_set_need_vfio(SpaprTceTable *tcet, bool need_vfio)
 329{
 330    size_t table_size = tcet->nb_table * sizeof(uint64_t);
 331    uint64_t *oldtable;
 332    int newfd = -1;
 333
 334    g_assert(need_vfio != tcet->need_vfio);
 335
 336    tcet->need_vfio = need_vfio;
 337
 338    if (!need_vfio || (tcet->fd != -1 && kvmppc_has_cap_spapr_vfio())) {
 339        return;
 340    }
 341
 342    oldtable = tcet->table;
 343
 344    tcet->table = spapr_tce_alloc_table(tcet->liobn,
 345                                        tcet->page_shift,
 346                                        tcet->bus_offset,
 347                                        tcet->nb_table,
 348                                        &newfd,
 349                                        need_vfio);
 350    memcpy(tcet->table, oldtable, table_size);
 351
 352    spapr_tce_free_table(oldtable, tcet->fd, tcet->nb_table);
 353
 354    tcet->fd = newfd;
 355}
 356
 357SpaprTceTable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn)
 358{
 359    SpaprTceTable *tcet;
 360    gchar *tmp;
 361
 362    if (spapr_tce_find_by_liobn(liobn)) {
 363        error_report("Attempted to create TCE table with duplicate"
 364                " LIOBN 0x%x", liobn);
 365        return NULL;
 366    }
 367
 368    tcet = SPAPR_TCE_TABLE(object_new(TYPE_SPAPR_TCE_TABLE));
 369    tcet->liobn = liobn;
 370
 371    tmp = g_strdup_printf("tce-table-%x", liobn);
 372    object_property_add_child(OBJECT(owner), tmp, OBJECT(tcet));
 373    g_free(tmp);
 374    object_unref(OBJECT(tcet));
 375
 376    qdev_realize(DEVICE(tcet), NULL, NULL);
 377
 378    return tcet;
 379}
 380
 381void spapr_tce_table_enable(SpaprTceTable *tcet,
 382                            uint32_t page_shift, uint64_t bus_offset,
 383                            uint32_t nb_table)
 384{
 385    if (tcet->nb_table) {
 386        warn_report("trying to enable already enabled TCE table");
 387        return;
 388    }
 389
 390    tcet->bus_offset = bus_offset;
 391    tcet->page_shift = page_shift;
 392    tcet->nb_table = nb_table;
 393    tcet->table = spapr_tce_alloc_table(tcet->liobn,
 394                                        tcet->page_shift,
 395                                        tcet->bus_offset,
 396                                        tcet->nb_table,
 397                                        &tcet->fd,
 398                                        tcet->need_vfio);
 399
 400    memory_region_set_size(MEMORY_REGION(&tcet->iommu),
 401                           (uint64_t)tcet->nb_table << tcet->page_shift);
 402    memory_region_add_subregion(&tcet->root, tcet->bus_offset,
 403                                MEMORY_REGION(&tcet->iommu));
 404}
 405
 406void spapr_tce_table_disable(SpaprTceTable *tcet)
 407{
 408    if (!tcet->nb_table) {
 409        return;
 410    }
 411
 412    memory_region_del_subregion(&tcet->root, MEMORY_REGION(&tcet->iommu));
 413    memory_region_set_size(MEMORY_REGION(&tcet->iommu), 0);
 414
 415    spapr_tce_free_table(tcet->table, tcet->fd, tcet->nb_table);
 416    tcet->fd = -1;
 417    tcet->table = NULL;
 418    tcet->bus_offset = 0;
 419    tcet->page_shift = 0;
 420    tcet->nb_table = 0;
 421}
 422
 423static void spapr_tce_table_unrealize(DeviceState *dev)
 424{
 425    SpaprTceTable *tcet = SPAPR_TCE_TABLE(dev);
 426
 427    vmstate_unregister(VMSTATE_IF(tcet), &vmstate_spapr_tce_table, tcet);
 428
 429    QLIST_REMOVE(tcet, list);
 430
 431    spapr_tce_table_disable(tcet);
 432}
 433
 434MemoryRegion *spapr_tce_get_iommu(SpaprTceTable *tcet)
 435{
 436    return &tcet->root;
 437}
 438
 439static void spapr_tce_reset(DeviceState *dev)
 440{
 441    SpaprTceTable *tcet = SPAPR_TCE_TABLE(dev);
 442    size_t table_size = tcet->nb_table * sizeof(uint64_t);
 443
 444    if (tcet->nb_table) {
 445        memset(tcet->table, 0, table_size);
 446    }
 447}
 448
 449static target_ulong put_tce_emu(SpaprTceTable *tcet, target_ulong ioba,
 450                                target_ulong tce)
 451{
 452    IOMMUTLBEvent event;
 453    hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
 454    unsigned long index = (ioba - tcet->bus_offset) >> tcet->page_shift;
 455
 456    if (index >= tcet->nb_table) {
 457        hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x"
 458                      TARGET_FMT_lx "\n", ioba);
 459        return H_PARAMETER;
 460    }
 461
 462    tcet->table[index] = tce;
 463
 464    event.entry.target_as = &address_space_memory,
 465    event.entry.iova = (ioba - tcet->bus_offset) & page_mask;
 466    event.entry.translated_addr = tce & page_mask;
 467    event.entry.addr_mask = ~page_mask;
 468    event.entry.perm = spapr_tce_iommu_access_flags(tce);
 469    event.type = event.entry.perm ? IOMMU_NOTIFIER_MAP : IOMMU_NOTIFIER_UNMAP;
 470    memory_region_notify_iommu(&tcet->iommu, 0, event);
 471
 472    return H_SUCCESS;
 473}
 474
 475static target_ulong h_put_tce_indirect(PowerPCCPU *cpu,
 476                                       SpaprMachineState *spapr,
 477                                       target_ulong opcode, target_ulong *args)
 478{
 479    int i;
 480    target_ulong liobn = args[0];
 481    target_ulong ioba = args[1];
 482    target_ulong ioba1 = ioba;
 483    target_ulong tce_list = args[2];
 484    target_ulong npages = args[3];
 485    target_ulong ret = H_PARAMETER, tce = 0;
 486    SpaprTceTable *tcet = spapr_tce_find_by_liobn(liobn);
 487    CPUState *cs = CPU(cpu);
 488    hwaddr page_mask, page_size;
 489
 490    if (!tcet) {
 491        return H_PARAMETER;
 492    }
 493
 494    if ((npages > 512) || (tce_list & SPAPR_TCE_PAGE_MASK)) {
 495        return H_PARAMETER;
 496    }
 497
 498    page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
 499    page_size = IOMMU_PAGE_SIZE(tcet->page_shift);
 500    ioba &= page_mask;
 501
 502    for (i = 0; i < npages; ++i, ioba += page_size) {
 503        tce = ldq_be_phys(cs->as, tce_list + i * sizeof(target_ulong));
 504
 505        ret = put_tce_emu(tcet, ioba, tce);
 506        if (ret) {
 507            break;
 508        }
 509    }
 510
 511    /* Trace last successful or the first problematic entry */
 512    i = i ? (i - 1) : 0;
 513    if (SPAPR_IS_PCI_LIOBN(liobn)) {
 514        trace_spapr_iommu_pci_indirect(liobn, ioba1, tce_list, i, tce, ret);
 515    } else {
 516        trace_spapr_iommu_indirect(liobn, ioba1, tce_list, i, tce, ret);
 517    }
 518    return ret;
 519}
 520
 521static target_ulong h_stuff_tce(PowerPCCPU *cpu, SpaprMachineState *spapr,
 522                              target_ulong opcode, target_ulong *args)
 523{
 524    int i;
 525    target_ulong liobn = args[0];
 526    target_ulong ioba = args[1];
 527    target_ulong tce_value = args[2];
 528    target_ulong npages = args[3];
 529    target_ulong ret = H_PARAMETER;
 530    SpaprTceTable *tcet = spapr_tce_find_by_liobn(liobn);
 531    hwaddr page_mask, page_size;
 532
 533    if (!tcet) {
 534        return H_PARAMETER;
 535    }
 536
 537    if (npages > tcet->nb_table) {
 538        return H_PARAMETER;
 539    }
 540
 541    page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
 542    page_size = IOMMU_PAGE_SIZE(tcet->page_shift);
 543    ioba &= page_mask;
 544
 545    for (i = 0; i < npages; ++i, ioba += page_size) {
 546        ret = put_tce_emu(tcet, ioba, tce_value);
 547        if (ret) {
 548            break;
 549        }
 550    }
 551    if (SPAPR_IS_PCI_LIOBN(liobn)) {
 552        trace_spapr_iommu_pci_stuff(liobn, ioba, tce_value, npages, ret);
 553    } else {
 554        trace_spapr_iommu_stuff(liobn, ioba, tce_value, npages, ret);
 555    }
 556
 557    return ret;
 558}
 559
 560static target_ulong h_put_tce(PowerPCCPU *cpu, SpaprMachineState *spapr,
 561                              target_ulong opcode, target_ulong *args)
 562{
 563    target_ulong liobn = args[0];
 564    target_ulong ioba = args[1];
 565    target_ulong tce = args[2];
 566    target_ulong ret = H_PARAMETER;
 567    SpaprTceTable *tcet = spapr_tce_find_by_liobn(liobn);
 568
 569    if (tcet) {
 570        hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
 571
 572        ioba &= page_mask;
 573
 574        ret = put_tce_emu(tcet, ioba, tce);
 575    }
 576    if (SPAPR_IS_PCI_LIOBN(liobn)) {
 577        trace_spapr_iommu_pci_put(liobn, ioba, tce, ret);
 578    } else {
 579        trace_spapr_iommu_put(liobn, ioba, tce, ret);
 580    }
 581
 582    return ret;
 583}
 584
 585static target_ulong get_tce_emu(SpaprTceTable *tcet, target_ulong ioba,
 586                                target_ulong *tce)
 587{
 588    unsigned long index = (ioba - tcet->bus_offset) >> tcet->page_shift;
 589
 590    if (index >= tcet->nb_table) {
 591        hcall_dprintf("spapr_iommu_get_tce on out-of-bounds IOBA 0x"
 592                      TARGET_FMT_lx "\n", ioba);
 593        return H_PARAMETER;
 594    }
 595
 596    *tce = tcet->table[index];
 597
 598    return H_SUCCESS;
 599}
 600
 601static target_ulong h_get_tce(PowerPCCPU *cpu, SpaprMachineState *spapr,
 602                              target_ulong opcode, target_ulong *args)
 603{
 604    target_ulong liobn = args[0];
 605    target_ulong ioba = args[1];
 606    target_ulong tce = 0;
 607    target_ulong ret = H_PARAMETER;
 608    SpaprTceTable *tcet = spapr_tce_find_by_liobn(liobn);
 609
 610    if (tcet) {
 611        hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
 612
 613        ioba &= page_mask;
 614
 615        ret = get_tce_emu(tcet, ioba, &tce);
 616        if (!ret) {
 617            args[0] = tce;
 618        }
 619    }
 620    if (SPAPR_IS_PCI_LIOBN(liobn)) {
 621        trace_spapr_iommu_pci_get(liobn, ioba, ret, tce);
 622    } else {
 623        trace_spapr_iommu_get(liobn, ioba, ret, tce);
 624    }
 625
 626    return ret;
 627}
 628
 629int spapr_dma_dt(void *fdt, int node_off, const char *propname,
 630                 uint32_t liobn, uint64_t window, uint32_t size)
 631{
 632    uint32_t dma_prop[5];
 633    int ret;
 634
 635    dma_prop[0] = cpu_to_be32(liobn);
 636    dma_prop[1] = cpu_to_be32(window >> 32);
 637    dma_prop[2] = cpu_to_be32(window & 0xFFFFFFFF);
 638    dma_prop[3] = 0; /* window size is 32 bits */
 639    dma_prop[4] = cpu_to_be32(size);
 640
 641    ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2);
 642    if (ret < 0) {
 643        return ret;
 644    }
 645
 646    ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2);
 647    if (ret < 0) {
 648        return ret;
 649    }
 650
 651    ret = fdt_setprop(fdt, node_off, propname, dma_prop, sizeof(dma_prop));
 652    if (ret < 0) {
 653        return ret;
 654    }
 655
 656    return 0;
 657}
 658
 659int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname,
 660                      SpaprTceTable *tcet)
 661{
 662    if (!tcet) {
 663        return 0;
 664    }
 665
 666    return spapr_dma_dt(fdt, node_off, propname,
 667                        tcet->liobn, 0, tcet->nb_table << tcet->page_shift);
 668}
 669
 670static void spapr_tce_table_class_init(ObjectClass *klass, void *data)
 671{
 672    DeviceClass *dc = DEVICE_CLASS(klass);
 673    dc->realize = spapr_tce_table_realize;
 674    dc->reset = spapr_tce_reset;
 675    dc->unrealize = spapr_tce_table_unrealize;
 676    /* Reason: This is just an internal device for handling the hypercalls */
 677    dc->user_creatable = false;
 678
 679    QLIST_INIT(&spapr_tce_tables);
 680
 681    /* hcall-tce */
 682    spapr_register_hypercall(H_PUT_TCE, h_put_tce);
 683    spapr_register_hypercall(H_GET_TCE, h_get_tce);
 684    spapr_register_hypercall(H_PUT_TCE_INDIRECT, h_put_tce_indirect);
 685    spapr_register_hypercall(H_STUFF_TCE, h_stuff_tce);
 686}
 687
 688static TypeInfo spapr_tce_table_info = {
 689    .name = TYPE_SPAPR_TCE_TABLE,
 690    .parent = TYPE_DEVICE,
 691    .instance_size = sizeof(SpaprTceTable),
 692    .class_init = spapr_tce_table_class_init,
 693};
 694
 695static void spapr_iommu_memory_region_class_init(ObjectClass *klass, void *data)
 696{
 697    IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 698
 699    imrc->translate = spapr_tce_translate_iommu;
 700    imrc->replay = spapr_tce_replay;
 701    imrc->get_min_page_size = spapr_tce_get_min_page_size;
 702    imrc->notify_flag_changed = spapr_tce_notify_flag_changed;
 703    imrc->get_attr = spapr_tce_get_attr;
 704}
 705
 706static const TypeInfo spapr_iommu_memory_region_info = {
 707    .parent = TYPE_IOMMU_MEMORY_REGION,
 708    .name = TYPE_SPAPR_IOMMU_MEMORY_REGION,
 709    .class_init = spapr_iommu_memory_region_class_init,
 710};
 711
 712static void register_types(void)
 713{
 714    type_register_static(&spapr_tce_table_info);
 715    type_register_static(&spapr_iommu_memory_region_info);
 716}
 717
 718type_init(register_types);
 719