hw/spapr_vio.c

   1 /*
   2  * QEMU sPAPR VIO code
   3  *
   4  * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
   5  * Based on the s390 virtio bus code:
   6  * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "hw.h"
  23 #include "sysemu.h"
  24 #include "boards.h"
  25 #include "monitor.h"
  26 #include "loader.h"
  27 #include "elf.h"
  28 #include "hw/sysbus.h"
  29 #include "kvm.h"
  30 #include "device_tree.h"
  31 #include "kvm_ppc.h"
  32
  33 #include "hw/spapr.h"
  34 #include "hw/spapr_vio.h"
  35 #include "hw/xics.h"
  36
  37 #ifdef CONFIG_FDT
  38 #include <libfdt.h>
  39 #endif /* CONFIG_FDT */
  40
  41 /* #define DEBUG_SPAPR */
  42 /* #define DEBUG_TCE */
  43
  44 #ifdef DEBUG_SPAPR
  45 #define dprintf(fmt, ...) \
  46     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  47 #else
  48 #define dprintf(fmt, ...) \
  49     do { } while (0)
  50 #endif
  51
  52 static Property spapr_vio_props[] = {
  53     DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, vio_irq_num, 0), \
  54     DEFINE_PROP_END_OF_LIST(),
  55 };
  56
  57 static const TypeInfo spapr_vio_bus_info = {
  58     .name = TYPE_SPAPR_VIO_BUS,
  59     .parent = TYPE_BUS,
  60     .instance_size = sizeof(VIOsPAPRBus),
  61 };
  62
  63 VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
  64 {
  65     BusChild *kid;
  66     VIOsPAPRDevice *dev = NULL;
  67
  68     QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
  69         dev = (VIOsPAPRDevice *)kid->child;
  70         if (dev->reg == reg) {
  71             return dev;
  72         }
  73     }
  74
  75     return NULL;
  76 }
  77
  78 static char *vio_format_dev_name(VIOsPAPRDevice *dev)
  79 {
  80     VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
  81     char *name;
  82
  83     /* Device tree style name device@reg */
  84     if (asprintf(&name, "%s@%x", pc->dt_name, dev->reg) < 0) {
  85         return NULL;
  86     }
  87
  88     return name;
  89 }
  90
  91 #ifdef CONFIG_FDT
  92 static int vio_make_devnode(VIOsPAPRDevice *dev,
  93                             void *fdt)
  94 {
  95     VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
  96     int vdevice_off, node_off, ret;
  97     char *dt_name;
  98
  99     vdevice_off = fdt_path_offset(fdt, "/vdevice");
 100     if (vdevice_off < 0) {
 101         return vdevice_off;
 102     }
 103
 104     dt_name = vio_format_dev_name(dev);
 105     if (!dt_name) {
 106         return -ENOMEM;
 107     }
 108
 109     node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
 110     free(dt_name);
 111     if (node_off < 0) {
 112         return node_off;
 113     }
 114
 115     ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
 116     if (ret < 0) {
 117         return ret;
 118     }
 119
 120     if (pc->dt_type) {
 121         ret = fdt_setprop_string(fdt, node_off, "device_type",
 122                                  pc->dt_type);
 123         if (ret < 0) {
 124             return ret;
 125         }
 126     }
 127
 128     if (pc->dt_compatible) {
 129         ret = fdt_setprop_string(fdt, node_off, "compatible",
 130                                  pc->dt_compatible);
 131         if (ret < 0) {
 132             return ret;
 133         }
 134     }
 135
 136     if (dev->qirq) {
 137         uint32_t ints_prop[] = {cpu_to_be32(dev->vio_irq_num), 0};
 138
 139         ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
 140                           sizeof(ints_prop));
 141         if (ret < 0) {
 142             return ret;
 143         }
 144     }
 145
 146     if (dev->rtce_window_size) {
 147         uint32_t dma_prop[] = {cpu_to_be32(dev->reg),
 148                                0, 0,
 149                                0, cpu_to_be32(dev->rtce_window_size)};
 150
 151         ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2);
 152         if (ret < 0) {
 153             return ret;
 154         }
 155
 156         ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2);
 157         if (ret < 0) {
 158             return ret;
 159         }
 160
 161         ret = fdt_setprop(fdt, node_off, "ibm,my-dma-window", dma_prop,
 162                           sizeof(dma_prop));
 163         if (ret < 0) {
 164             return ret;
 165         }
 166     }
 167
 168     if (pc->devnode) {
 169         ret = (pc->devnode)(dev, fdt, node_off);
 170         if (ret < 0) {
 171             return ret;
 172         }
 173     }
 174
 175     return node_off;
 176 }
 177 #endif /* CONFIG_FDT */
 178
 179 /*
 180  * RTCE handling
 181  */
 182
 183 static void rtce_init(VIOsPAPRDevice *dev)
 184 {
 185     size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT)
 186         * sizeof(VIOsPAPR_RTCE);
 187
 188     if (size) {
 189         dev->rtce_table = kvmppc_create_spapr_tce(dev->reg,
 190                                                   dev->rtce_window_size,
 191                                                   &dev->kvmtce_fd);
 192
 193         if (!dev->rtce_table) {
 194             dev->rtce_table = g_malloc0(size);
 195         }
 196     }
 197 }
 198
 199 static target_ulong h_put_tce(CPUPPCState *env, sPAPREnvironment *spapr,
 200                               target_ulong opcode, target_ulong *args)
 201 {
 202     target_ulong liobn = args[0];
 203     target_ulong ioba = args[1];
 204     target_ulong tce = args[2];
 205     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, liobn);
 206     VIOsPAPR_RTCE *rtce;
 207
 208     if (!dev) {
 209         hcall_dprintf("LIOBN 0x" TARGET_FMT_lx " does not exist\n", liobn);
 210         return H_PARAMETER;
 211     }
 212
 213     ioba &= ~(SPAPR_VIO_TCE_PAGE_SIZE - 1);
 214
 215 #ifdef DEBUG_TCE
 216     fprintf(stderr, "spapr_vio_put_tce on %s  ioba 0x" TARGET_FMT_lx
 217             "  TCE 0x" TARGET_FMT_lx "\n", dev->qdev.id, ioba, tce);
 218 #endif
 219
 220     if (ioba >= dev->rtce_window_size) {
 221         hcall_dprintf("Out-of-bounds IOBA 0x" TARGET_FMT_lx "\n", ioba);
 222         return H_PARAMETER;
 223     }
 224
 225     rtce = dev->rtce_table + (ioba >> SPAPR_VIO_TCE_PAGE_SHIFT);
 226     rtce->tce = tce;
 227
 228     return H_SUCCESS;
 229 }
 230
 231 int spapr_vio_check_tces(VIOsPAPRDevice *dev, target_ulong ioba,
 232                          target_ulong len, enum VIOsPAPR_TCEAccess access)
 233 {
 234     int start, end, i;
 235
 236     start = ioba >> SPAPR_VIO_TCE_PAGE_SHIFT;
 237     end = (ioba + len - 1) >> SPAPR_VIO_TCE_PAGE_SHIFT;
 238
 239     for (i = start; i <= end; i++) {
 240         if ((dev->rtce_table[i].tce & access) != access) {
 241 #ifdef DEBUG_TCE
 242             fprintf(stderr, "FAIL on %d\n", i);
 243 #endif
 244             return -1;
 245         }
 246     }
 247
 248     return 0;
 249 }
 250
 251 int spapr_tce_dma_write(VIOsPAPRDevice *dev, uint64_t taddr, const void *buf,
 252                         uint32_t size)
 253 {
 254 #ifdef DEBUG_TCE
 255     fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
 256             (unsigned long long)taddr, size);
 257 #endif
 258
 259     /* Check for bypass */
 260     if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
 261         cpu_physical_memory_write(taddr, buf, size);
 262         return 0;
 263     }
 264
 265     while (size) {
 266         uint64_t tce;
 267         uint32_t lsize;
 268         uint64_t txaddr;
 269
 270         /* Check if we are in bound */
 271         if (taddr >= dev->rtce_window_size) {
 272 #ifdef DEBUG_TCE
 273             fprintf(stderr, "spapr_tce_dma_write out of bounds\n");
 274 #endif
 275             return H_DEST_PARM;
 276         }
 277         tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce;
 278
 279         /* How much til end of page ? */
 280         lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
 281
 282         /* Check TCE */
 283         if (!(tce & 2)) {
 284             return H_DEST_PARM;
 285         }
 286
 287         /* Translate */
 288         txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) |
 289             (taddr & SPAPR_VIO_TCE_PAGE_MASK);
 290
 291 #ifdef DEBUG_TCE
 292         fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
 293                 (unsigned long long)txaddr, lsize);
 294 #endif
 295
 296         /* Do it */
 297         cpu_physical_memory_write(txaddr, buf, lsize);
 298         buf += lsize;
 299         taddr += lsize;
 300         size -= lsize;
 301     }
 302     return 0;
 303 }
 304
 305 int spapr_tce_dma_zero(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t size)
 306 {
 307     /* FIXME: allocating a temp buffer is nasty, but just stepping
 308      * through writing zeroes is awkward.  This will do for now. */
 309     uint8_t zeroes[size];
 310
 311 #ifdef DEBUG_TCE
 312     fprintf(stderr, "spapr_tce_dma_zero taddr=0x%llx size=0x%x\n",
 313             (unsigned long long)taddr, size);
 314 #endif
 315
 316     memset(zeroes, 0, size);
 317     return spapr_tce_dma_write(dev, taddr, zeroes, size);
 318 }
 319
 320 void stb_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint8_t val)
 321 {
 322     spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
 323 }
 324
 325 void sth_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint16_t val)
 326 {
 327     val = tswap16(val);
 328     spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
 329 }
 330
 331
 332 void stw_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t val)
 333 {
 334     val = tswap32(val);
 335     spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
 336 }
 337
 338 void stq_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint64_t val)
 339 {
 340     val = tswap64(val);
 341     spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
 342 }
 343
 344 int spapr_tce_dma_read(VIOsPAPRDevice *dev, uint64_t taddr, void *buf,
 345                        uint32_t size)
 346 {
 347 #ifdef DEBUG_TCE
 348     fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
 349             (unsigned long long)taddr, size);
 350 #endif
 351
 352     /* Check for bypass */
 353     if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
 354         cpu_physical_memory_read(taddr, buf, size);
 355         return 0;
 356     }
 357
 358     while (size) {
 359         uint64_t tce;
 360         uint32_t lsize;
 361         uint64_t txaddr;
 362
 363         /* Check if we are in bound */
 364         if (taddr >= dev->rtce_window_size) {
 365 #ifdef DEBUG_TCE
 366             fprintf(stderr, "spapr_tce_dma_read out of bounds\n");
 367 #endif
 368             return H_DEST_PARM;
 369         }
 370         tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce;
 371
 372         /* How much til end of page ? */
 373         lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
 374
 375         /* Check TCE */
 376         if (!(tce & 1)) {
 377             return H_DEST_PARM;
 378         }
 379
 380         /* Translate */
 381         txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) |
 382             (taddr & SPAPR_VIO_TCE_PAGE_MASK);
 383
 384 #ifdef DEBUG_TCE
 385         fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
 386                 (unsigned long long)txaddr, lsize);
 387 #endif
 388         /* Do it */
 389         cpu_physical_memory_read(txaddr, buf, lsize);
 390         buf += lsize;
 391         taddr += lsize;
 392         size -= lsize;
 393     }
 394     return H_SUCCESS;
 395 }
 396
 397 uint64_t ldq_tce(VIOsPAPRDevice *dev, uint64_t taddr)
 398 {
 399     uint64_t val;
 400
 401     spapr_tce_dma_read(dev, taddr, &val, sizeof(val));
 402     return tswap64(val);
 403 }
 404
 405 /*
 406  * CRQ handling
 407  */
 408 static target_ulong h_reg_crq(CPUPPCState *env, sPAPREnvironment *spapr,
 409                               target_ulong opcode, target_ulong *args)
 410 {
 411     target_ulong reg = args[0];
 412     target_ulong queue_addr = args[1];
 413     target_ulong queue_len = args[2];
 414     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 415
 416     if (!dev) {
 417         hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
 418         return H_PARAMETER;
 419     }
 420
 421     /* We can't grok a queue size bigger than 256M for now */
 422     if (queue_len < 0x1000 || queue_len > 0x10000000) {
 423         hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
 424                       ")\n", queue_len);
 425         return H_PARAMETER;
 426     }
 427
 428     /* Check queue alignment */
 429     if (queue_addr & 0xfff) {
 430         hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr);
 431         return H_PARAMETER;
 432     }
 433
 434     /* Check if device supports CRQs */
 435     if (!dev->crq.SendFunc) {
 436         hcall_dprintf("Device does not support CRQ\n");
 437         return H_NOT_FOUND;
 438     }
 439
 440     /* Already a queue ? */
 441     if (dev->crq.qsize) {
 442         hcall_dprintf("CRQ already registered\n");
 443         return H_RESOURCE;
 444     }
 445     dev->crq.qladdr = queue_addr;
 446     dev->crq.qsize = queue_len;
 447     dev->crq.qnext = 0;
 448
 449     dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x"
 450             TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n",
 451             reg, queue_addr, queue_len);
 452     return H_SUCCESS;
 453 }
 454
 455 static target_ulong free_crq(VIOsPAPRDevice *dev)
 456 {
 457     dev->crq.qladdr = 0;
 458     dev->crq.qsize = 0;
 459     dev->crq.qnext = 0;
 460
 461     dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg);
 462
 463     return H_SUCCESS;
 464 }
 465
 466 static target_ulong h_free_crq(CPUPPCState *env, sPAPREnvironment *spapr,
 467                                target_ulong opcode, target_ulong *args)
 468 {
 469     target_ulong reg = args[0];
 470     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 471
 472     if (!dev) {
 473         hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
 474         return H_PARAMETER;
 475     }
 476
 477     return free_crq(dev);
 478 }
 479
 480 static target_ulong h_send_crq(CPUPPCState *env, sPAPREnvironment *spapr,
 481                                target_ulong opcode, target_ulong *args)
 482 {
 483     target_ulong reg = args[0];
 484     target_ulong msg_hi = args[1];
 485     target_ulong msg_lo = args[2];
 486     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 487     uint64_t crq_mangle[2];
 488
 489     if (!dev) {
 490         hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
 491         return H_PARAMETER;
 492     }
 493     crq_mangle[0] = cpu_to_be64(msg_hi);
 494     crq_mangle[1] = cpu_to_be64(msg_lo);
 495
 496     if (dev->crq.SendFunc) {
 497         return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
 498     }
 499
 500     return H_HARDWARE;
 501 }
 502
 503 static target_ulong h_enable_crq(CPUPPCState *env, sPAPREnvironment *spapr,
 504                                  target_ulong opcode, target_ulong *args)
 505 {
 506     target_ulong reg = args[0];
 507     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 508
 509     if (!dev) {
 510         hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
 511         return H_PARAMETER;
 512     }
 513
 514     return 0;
 515 }
 516
 517 /* Returns negative error, 0 success, or positive: queue full */
 518 int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
 519 {
 520     int rc;
 521     uint8_t byte;
 522
 523     if (!dev->crq.qsize) {
 524         fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
 525         return -1;
 526     }
 527
 528     /* Maybe do a fast path for KVM just writing to the pages */
 529     rc = spapr_tce_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
 530     if (rc) {
 531         return rc;
 532     }
 533     if (byte != 0) {
 534         return 1;
 535     }
 536
 537     rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
 538                              &crq[8], 8);
 539     if (rc) {
 540         return rc;
 541     }
 542
 543     kvmppc_eieio();
 544
 545     rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
 546     if (rc) {
 547         return rc;
 548     }
 549
 550     dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
 551
 552     if (dev->signal_state & 1) {
 553         qemu_irq_pulse(dev->qirq);
 554     }
 555
 556     return 0;
 557 }
 558
 559 /* "quiesce" handling */
 560
 561 static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
 562 {
 563     dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS;
 564
 565     if (dev->rtce_table) {
 566         size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT)
 567             * sizeof(VIOsPAPR_RTCE);
 568         memset(dev->rtce_table, 0, size);
 569     }
 570
 571     dev->crq.qladdr = 0;
 572     dev->crq.qsize = 0;
 573     dev->crq.qnext = 0;
 574 }
 575
 576 static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token,
 577                                 uint32_t nargs, target_ulong args,
 578                                 uint32_t nret, target_ulong rets)
 579 {
 580     VIOsPAPRBus *bus = spapr->vio_bus;
 581     VIOsPAPRDevice *dev;
 582     uint32_t unit, enable;
 583
 584     if (nargs != 2) {
 585         rtas_st(rets, 0, -3);
 586         return;
 587     }
 588     unit = rtas_ld(args, 0);
 589     enable = rtas_ld(args, 1);
 590     dev = spapr_vio_find_by_reg(bus, unit);
 591     if (!dev) {
 592         rtas_st(rets, 0, -3);
 593         return;
 594     }
 595     if (enable) {
 596         dev->flags |= VIO_PAPR_FLAG_DMA_BYPASS;
 597     } else {
 598         dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS;
 599     }
 600
 601     rtas_st(rets, 0, 0);
 602 }
 603
 604 static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token,
 605                          uint32_t nargs, target_ulong args,
 606                          uint32_t nret, target_ulong rets)
 607 {
 608     VIOsPAPRBus *bus = spapr->vio_bus;
 609     BusChild *kid;
 610     VIOsPAPRDevice *dev = NULL;
 611
 612     if (nargs != 0) {
 613         rtas_st(rets, 0, -3);
 614         return;
 615     }
 616
 617     QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
 618         dev = (VIOsPAPRDevice *)kid->child;
 619         spapr_vio_quiesce_one(dev);
 620     }
 621
 622     rtas_st(rets, 0, 0);
 623 }
 624
 625 static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
 626 {
 627     VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
 628     BusChild *kid;
 629     VIOsPAPRDevice *other;
 630
 631     /*
 632      * Check for a device other than the given one which is already
 633      * using the requested address. We have to open code this because
 634      * the given dev might already be in the list.
 635      */
 636     QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
 637         other = DO_UPCAST(VIOsPAPRDevice, qdev, kid->child);
 638
 639         if (other != dev && other->reg == dev->reg) {
 640             return other;
 641         }
 642     }
 643
 644     return 0;
 645 }
 646
 647 static void spapr_vio_busdev_reset(DeviceState *qdev)
 648 {
 649     VIOsPAPRDevice *dev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev);
 650     VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
 651
 652     if (dev->crq.qsize) {
 653         free_crq(dev);
 654     }
 655
 656     if (pc->reset) {
 657         pc->reset(dev);
 658     }
 659 }
 660
 661 static int spapr_vio_busdev_init(DeviceState *qdev)
 662 {
 663     VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
 664     VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
 665     char *id;
 666
 667     if (dev->reg != -1) {
 668         /*
 669          * Explicitly assigned address, just verify that no-one else
 670          * is using it.  other mechanism). We have to open code this
 671          * rather than using spapr_vio_find_by_reg() because sdev
 672          * itself is already in the list.
 673          */
 674         VIOsPAPRDevice *other = reg_conflict(dev);
 675
 676         if (other) {
 677             fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
 678                     object_get_typename(OBJECT(qdev)),
 679                     object_get_typename(OBJECT(&other->qdev)),
 680                     dev->reg);
 681             return -1;
 682         }
 683     } else {
 684         /* Need to assign an address */
 685         VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
 686
 687         do {
 688             dev->reg = bus->next_reg++;
 689         } while (reg_conflict(dev));
 690     }
 691
 692     /* Don't overwrite ids assigned on the command line */
 693     if (!dev->qdev.id) {
 694         id = vio_format_dev_name(dev);
 695         if (!id) {
 696             return -1;
 697         }
 698         dev->qdev.id = id;
 699     }
 700
 701     dev->qirq = spapr_allocate_msi(dev->vio_irq_num, &dev->vio_irq_num);
 702     if (!dev->qirq) {
 703         return -1;
 704     }
 705
 706     rtce_init(dev);
 707
 708     return pc->init(dev);
 709 }
 710
 711 static target_ulong h_vio_signal(CPUPPCState *env, sPAPREnvironment *spapr,
 712                                  target_ulong opcode,
 713                                  target_ulong *args)
 714 {
 715     target_ulong reg = args[0];
 716     target_ulong mode = args[1];
 717     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 718     VIOsPAPRDeviceClass *pc;
 719
 720     if (!dev) {
 721         return H_PARAMETER;
 722     }
 723
 724     pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
 725
 726     if (mode & ~pc->signal_mask) {
 727         return H_PARAMETER;
 728     }
 729
 730     dev->signal_state = mode;
 731
 732     return H_SUCCESS;
 733 }
 734
 735 VIOsPAPRBus *spapr_vio_bus_init(void)
 736 {
 737     VIOsPAPRBus *bus;
 738     BusState *qbus;
 739     DeviceState *dev;
 740
 741     /* Create bridge device */
 742     dev = qdev_create(NULL, "spapr-vio-bridge");
 743     qdev_init_nofail(dev);
 744
 745     /* Create bus on bridge device */
 746
 747     qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
 748     bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
 749     bus->next_reg = 0x1000;
 750
 751     /* hcall-vio */
 752     spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
 753
 754     /* hcall-tce */
 755     spapr_register_hypercall(H_PUT_TCE, h_put_tce);
 756
 757     /* hcall-crq */
 758     spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
 759     spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
 760     spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
 761     spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
 762
 763     /* RTAS calls */
 764     spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
 765     spapr_rtas_register("quiesce", rtas_quiesce);
 766
 767     return bus;
 768 }
 769
 770 /* Represents sPAPR hcall VIO devices */
 771
 772 static int spapr_vio_bridge_init(SysBusDevice *dev)
 773 {
 774     /* nothing */
 775     return 0;
 776 }
 777
 778 static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data)
 779 {
 780     DeviceClass *dc = DEVICE_CLASS(klass);
 781     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 782
 783     k->init = spapr_vio_bridge_init;
 784     dc->no_user = 1;
 785 }
 786
 787 static TypeInfo spapr_vio_bridge_info = {
 788     .name          = "spapr-vio-bridge",
 789     .parent        = TYPE_SYS_BUS_DEVICE,
 790     .instance_size = sizeof(SysBusDevice),
 791     .class_init    = spapr_vio_bridge_class_init,
 792 };
 793
 794 static void vio_spapr_device_class_init(ObjectClass *klass, void *data)
 795 {
 796     DeviceClass *k = DEVICE_CLASS(klass);
 797     k->init = spapr_vio_busdev_init;
 798     k->reset = spapr_vio_busdev_reset;
 799     k->bus_type = TYPE_SPAPR_VIO_BUS;
 800     k->props = spapr_vio_props;
 801 }
 802
 803 static TypeInfo spapr_vio_type_info = {
 804     .name = TYPE_VIO_SPAPR_DEVICE,
 805     .parent = TYPE_DEVICE,
 806     .instance_size = sizeof(VIOsPAPRDevice),
 807     .abstract = true,
 808     .class_size = sizeof(VIOsPAPRDeviceClass),
 809     .class_init = vio_spapr_device_class_init,
 810 };
 811
 812 static void spapr_vio_register_types(void)
 813 {
 814     type_register_static(&spapr_vio_bus_info);
 815     type_register_static(&spapr_vio_bridge_info);
 816     type_register_static(&spapr_vio_type_info);
 817 }
 818
 819 type_init(spapr_vio_register_types)
 820
 821 #ifdef CONFIG_FDT
 822 static int compare_reg(const void *p1, const void *p2)
 823 {
 824     VIOsPAPRDevice const *dev1, *dev2;
 825
 826     dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1;
 827     dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2;
 828
 829     if (dev1->reg < dev2->reg) {
 830         return -1;
 831     }
 832     if (dev1->reg == dev2->reg) {
 833         return 0;
 834     }
 835
 836     /* dev1->reg > dev2->reg */
 837     return 1;
 838 }
 839
 840 int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt)
 841 {
 842     DeviceState *qdev, **qdevs;
 843     BusChild *kid;
 844     int i, num, ret = 0;
 845
 846     /* Count qdevs on the bus list */
 847     num = 0;
 848     QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
 849         num++;
 850     }
 851
 852     /* Copy out into an array of pointers */
 853     qdevs = g_malloc(sizeof(qdev) * num);
 854     num = 0;
 855     QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
 856         qdevs[num++] = kid->child;
 857     }
 858
 859     /* Sort the array */
 860     qsort(qdevs, num, sizeof(qdev), compare_reg);
 861
 862     /* Hack alert. Give the devices to libfdt in reverse order, we happen
 863      * to know that will mean they are in forward order in the tree. */
 864     for (i = num - 1; i >= 0; i--) {
 865         VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]);
 866
 867         ret = vio_make_devnode(dev, fdt);
 868
 869         if (ret < 0) {
 870             goto out;
 871         }
 872     }
 873
 874     ret = 0;
 875 out:
 876     free(qdevs);
 877
 878     return ret;
 879 }
 880
 881 int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus)
 882 {
 883     VIOsPAPRDevice *dev;
 884     char *name, *path;
 885     int ret, offset;
 886
 887     dev = spapr_vty_get_default(bus);
 888     if (!dev)
 889         return 0;
 890
 891     offset = fdt_path_offset(fdt, "/chosen");
 892     if (offset < 0) {
 893         return offset;
 894     }
 895
 896     name = vio_format_dev_name(dev);
 897     if (!name) {
 898         return -ENOMEM;
 899     }
 900
 901     if (asprintf(&path, "/vdevice/%s", name) < 0) {
 902         path = NULL;
 903         ret = -ENOMEM;
 904         goto out;
 905     }
 906
 907     ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
 908 out:
 909     free(name);
 910     free(path);
 911
 912     return ret;
 913 }
 914 #endif /* CONFIG_FDT */