hw/ppc/spapr_iommu.c

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