hw/pci-host/ppce500.c

   1 /*
   2  * QEMU PowerPC E500 embedded processors pci controller emulation
   3  *
   4  * Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved.
   5  *
   6  * Author: Yu Liu,     <yu.liu@freescale.com>
   7  *
   8  * This file is derived from hw/ppc4xx_pci.c,
   9  * the copyright for that material belongs to the original owners.
  10  *
  11  * This is free software; you can redistribute it and/or modify
  12  * it under the terms of  the GNU General  Public License as published by
  13  * the Free Software Foundation;  either version 2 of the  License, or
  14  * (at your option) any later version.
  15  */
  16
  17 #include "qemu/osdep.h"
  18 #include "hw/hw.h"
  19 #include "hw/ppc/e500-ccsr.h"
  20 #include "hw/pci/pci.h"
  21 #include "hw/pci/pci_host.h"
  22 #include "qemu/bswap.h"
  23 #include "hw/pci-host/ppce500.h"
  24
  25 #ifdef DEBUG_PCI
  26 #define pci_debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
  27 #else
  28 #define pci_debug(fmt, ...)
  29 #endif
  30
  31 #define PCIE500_CFGADDR       0x0
  32 #define PCIE500_CFGDATA       0x4
  33 #define PCIE500_REG_BASE      0xC00
  34 #define PCIE500_ALL_SIZE      0x1000
  35 #define PCIE500_REG_SIZE      (PCIE500_ALL_SIZE - PCIE500_REG_BASE)
  36
  37 #define PCIE500_PCI_IOLEN     0x10000ULL
  38
  39 #define PPCE500_PCI_CONFIG_ADDR         0x0
  40 #define PPCE500_PCI_CONFIG_DATA         0x4
  41 #define PPCE500_PCI_INTACK              0x8
  42
  43 #define PPCE500_PCI_OW1                 (0xC20 - PCIE500_REG_BASE)
  44 #define PPCE500_PCI_OW2                 (0xC40 - PCIE500_REG_BASE)
  45 #define PPCE500_PCI_OW3                 (0xC60 - PCIE500_REG_BASE)
  46 #define PPCE500_PCI_OW4                 (0xC80 - PCIE500_REG_BASE)
  47 #define PPCE500_PCI_IW3                 (0xDA0 - PCIE500_REG_BASE)
  48 #define PPCE500_PCI_IW2                 (0xDC0 - PCIE500_REG_BASE)
  49 #define PPCE500_PCI_IW1                 (0xDE0 - PCIE500_REG_BASE)
  50
  51 #define PPCE500_PCI_GASKET_TIMR         (0xE20 - PCIE500_REG_BASE)
  52
  53 #define PCI_POTAR               0x0
  54 #define PCI_POTEAR              0x4
  55 #define PCI_POWBAR              0x8
  56 #define PCI_POWAR               0x10
  57
  58 #define PCI_PITAR               0x0
  59 #define PCI_PIWBAR              0x8
  60 #define PCI_PIWBEAR             0xC
  61 #define PCI_PIWAR               0x10
  62
  63 #define PPCE500_PCI_NR_POBS     5
  64 #define PPCE500_PCI_NR_PIBS     3
  65
  66 #define PIWAR_EN                0x80000000      /* Enable */
  67 #define PIWAR_PF                0x20000000      /* prefetch */
  68 #define PIWAR_TGI_LOCAL         0x00f00000      /* target - local memory */
  69 #define PIWAR_READ_SNOOP        0x00050000
  70 #define PIWAR_WRITE_SNOOP       0x00005000
  71 #define PIWAR_SZ_MASK           0x0000003f
  72
  73 struct  pci_outbound {
  74     uint32_t potar;
  75     uint32_t potear;
  76     uint32_t powbar;
  77     uint32_t powar;
  78     MemoryRegion mem;
  79 };
  80
  81 struct pci_inbound {
  82     uint32_t pitar;
  83     uint32_t piwbar;
  84     uint32_t piwbear;
  85     uint32_t piwar;
  86     MemoryRegion mem;
  87 };
  88
  89 #define TYPE_PPC_E500_PCI_HOST_BRIDGE "e500-pcihost"
  90
  91 #define PPC_E500_PCI_HOST_BRIDGE(obj) \
  92     OBJECT_CHECK(PPCE500PCIState, (obj), TYPE_PPC_E500_PCI_HOST_BRIDGE)
  93
  94 struct PPCE500PCIState {
  95     PCIHostState parent_obj;
  96
  97     struct pci_outbound pob[PPCE500_PCI_NR_POBS];
  98     struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
  99     uint32_t gasket_time;
 100     qemu_irq irq[PCI_NUM_PINS];
 101     uint32_t irq_num[PCI_NUM_PINS];
 102     uint32_t first_slot;
 103     uint32_t first_pin_irq;
 104     AddressSpace bm_as;
 105     MemoryRegion bm;
 106     /* mmio maps */
 107     MemoryRegion container;
 108     MemoryRegion iomem;
 109     MemoryRegion pio;
 110     MemoryRegion busmem;
 111 };
 112
 113 #define TYPE_PPC_E500_PCI_BRIDGE "e500-host-bridge"
 114 #define PPC_E500_PCI_BRIDGE(obj) \
 115     OBJECT_CHECK(PPCE500PCIBridgeState, (obj), TYPE_PPC_E500_PCI_BRIDGE)
 116
 117 struct PPCE500PCIBridgeState {
 118     /*< private >*/
 119     PCIDevice parent;
 120     /*< public >*/
 121
 122     MemoryRegion bar0;
 123 };
 124
 125 typedef struct PPCE500PCIBridgeState PPCE500PCIBridgeState;
 126 typedef struct PPCE500PCIState PPCE500PCIState;
 127
 128 static uint64_t pci_reg_read4(void *opaque, hwaddr addr,
 129                               unsigned size)
 130 {
 131     PPCE500PCIState *pci = opaque;
 132     unsigned long win;
 133     uint32_t value = 0;
 134     int idx;
 135
 136     win = addr & 0xfe0;
 137
 138     switch (win) {
 139     case PPCE500_PCI_OW1:
 140     case PPCE500_PCI_OW2:
 141     case PPCE500_PCI_OW3:
 142     case PPCE500_PCI_OW4:
 143         idx = (addr >> 5) & 0x7;
 144         switch (addr & 0x1F) {
 145         case PCI_POTAR:
 146             value = pci->pob[idx].potar;
 147             break;
 148         case PCI_POTEAR:
 149             value = pci->pob[idx].potear;
 150             break;
 151         case PCI_POWBAR:
 152             value = pci->pob[idx].powbar;
 153             break;
 154         case PCI_POWAR:
 155             value = pci->pob[idx].powar;
 156             break;
 157         default:
 158             break;
 159         }
 160         break;
 161
 162     case PPCE500_PCI_IW3:
 163     case PPCE500_PCI_IW2:
 164     case PPCE500_PCI_IW1:
 165         idx = ((addr >> 5) & 0x3) - 1;
 166         switch (addr & 0x1F) {
 167         case PCI_PITAR:
 168             value = pci->pib[idx].pitar;
 169             break;
 170         case PCI_PIWBAR:
 171             value = pci->pib[idx].piwbar;
 172             break;
 173         case PCI_PIWBEAR:
 174             value = pci->pib[idx].piwbear;
 175             break;
 176         case PCI_PIWAR:
 177             value = pci->pib[idx].piwar;
 178             break;
 179         default:
 180             break;
 181         };
 182         break;
 183
 184     case PPCE500_PCI_GASKET_TIMR:
 185         value = pci->gasket_time;
 186         break;
 187
 188     default:
 189         break;
 190     }
 191
 192     pci_debug("%s: win:%lx(addr:" TARGET_FMT_plx ") -> value:%x\n", __func__,
 193               win, addr, value);
 194     return value;
 195 }
 196
 197 /* DMA mapping */
 198 static void e500_update_piw(PPCE500PCIState *pci, int idx)
 199 {
 200     uint64_t tar = ((uint64_t)pci->pib[idx].pitar) << 12;
 201     uint64_t wbar = ((uint64_t)pci->pib[idx].piwbar) << 12;
 202     uint64_t war = pci->pib[idx].piwar;
 203     uint64_t size = 2ULL << (war & PIWAR_SZ_MASK);
 204     MemoryRegion *address_space_mem = get_system_memory();
 205     MemoryRegion *mem = &pci->pib[idx].mem;
 206     MemoryRegion *bm = &pci->bm;
 207     char *name;
 208
 209     if (memory_region_is_mapped(mem)) {
 210         /* Before we modify anything, unmap and destroy the region */
 211         memory_region_del_subregion(bm, mem);
 212         object_unparent(OBJECT(mem));
 213     }
 214
 215     if (!(war & PIWAR_EN)) {
 216         /* Not enabled, nothing to do */
 217         return;
 218     }
 219
 220     name = g_strdup_printf("PCI Inbound Window %d", idx);
 221     memory_region_init_alias(mem, OBJECT(pci), name, address_space_mem, tar,
 222                              size);
 223     memory_region_add_subregion_overlap(bm, wbar, mem, -1);
 224     g_free(name);
 225
 226     pci_debug("%s: Added window of size=%#lx from PCI=%#lx to CPU=%#lx\n",
 227               __func__, size, wbar, tar);
 228 }
 229
 230 /* BAR mapping */
 231 static void e500_update_pow(PPCE500PCIState *pci, int idx)
 232 {
 233     uint64_t tar = ((uint64_t)pci->pob[idx].potar) << 12;
 234     uint64_t wbar = ((uint64_t)pci->pob[idx].powbar) << 12;
 235     uint64_t war = pci->pob[idx].powar;
 236     uint64_t size = 2ULL << (war & PIWAR_SZ_MASK);
 237     MemoryRegion *mem = &pci->pob[idx].mem;
 238     MemoryRegion *address_space_mem = get_system_memory();
 239     char *name;
 240
 241     if (memory_region_is_mapped(mem)) {
 242         /* Before we modify anything, unmap and destroy the region */
 243         memory_region_del_subregion(address_space_mem, mem);
 244         object_unparent(OBJECT(mem));
 245     }
 246
 247     if (!(war & PIWAR_EN)) {
 248         /* Not enabled, nothing to do */
 249         return;
 250     }
 251
 252     name = g_strdup_printf("PCI Outbound Window %d", idx);
 253     memory_region_init_alias(mem, OBJECT(pci), name, &pci->busmem, tar,
 254                              size);
 255     memory_region_add_subregion(address_space_mem, wbar, mem);
 256     g_free(name);
 257
 258     pci_debug("%s: Added window of size=%#lx from CPU=%#lx to PCI=%#lx\n",
 259               __func__, size, wbar, tar);
 260 }
 261
 262 static void pci_reg_write4(void *opaque, hwaddr addr,
 263                            uint64_t value, unsigned size)
 264 {
 265     PPCE500PCIState *pci = opaque;
 266     unsigned long win;
 267     int idx;
 268
 269     win = addr & 0xfe0;
 270
 271     pci_debug("%s: value:%x -> win:%lx(addr:" TARGET_FMT_plx ")\n",
 272               __func__, (unsigned)value, win, addr);
 273
 274     switch (win) {
 275     case PPCE500_PCI_OW1:
 276     case PPCE500_PCI_OW2:
 277     case PPCE500_PCI_OW3:
 278     case PPCE500_PCI_OW4:
 279         idx = (addr >> 5) & 0x7;
 280         switch (addr & 0x1F) {
 281         case PCI_POTAR:
 282             pci->pob[idx].potar = value;
 283             e500_update_pow(pci, idx);
 284             break;
 285         case PCI_POTEAR:
 286             pci->pob[idx].potear = value;
 287             e500_update_pow(pci, idx);
 288             break;
 289         case PCI_POWBAR:
 290             pci->pob[idx].powbar = value;
 291             e500_update_pow(pci, idx);
 292             break;
 293         case PCI_POWAR:
 294             pci->pob[idx].powar = value;
 295             e500_update_pow(pci, idx);
 296             break;
 297         default:
 298             break;
 299         };
 300         break;
 301
 302     case PPCE500_PCI_IW3:
 303     case PPCE500_PCI_IW2:
 304     case PPCE500_PCI_IW1:
 305         idx = ((addr >> 5) & 0x3) - 1;
 306         switch (addr & 0x1F) {
 307         case PCI_PITAR:
 308             pci->pib[idx].pitar = value;
 309             e500_update_piw(pci, idx);
 310             break;
 311         case PCI_PIWBAR:
 312             pci->pib[idx].piwbar = value;
 313             e500_update_piw(pci, idx);
 314             break;
 315         case PCI_PIWBEAR:
 316             pci->pib[idx].piwbear = value;
 317             e500_update_piw(pci, idx);
 318             break;
 319         case PCI_PIWAR:
 320             pci->pib[idx].piwar = value;
 321             e500_update_piw(pci, idx);
 322             break;
 323         default:
 324             break;
 325         };
 326         break;
 327
 328     case PPCE500_PCI_GASKET_TIMR:
 329         pci->gasket_time = value;
 330         break;
 331
 332     default:
 333         break;
 334     };
 335 }
 336
 337 static const MemoryRegionOps e500_pci_reg_ops = {
 338     .read = pci_reg_read4,
 339     .write = pci_reg_write4,
 340     .endianness = DEVICE_BIG_ENDIAN,
 341 };
 342
 343 static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int pin)
 344 {
 345     int devno = pci_dev->devfn >> 3;
 346     int ret;
 347
 348     ret = ppce500_pci_map_irq_slot(devno, pin);
 349
 350     pci_debug("%s: devfn %x irq %d -> %d  devno:%x\n", __func__,
 351            pci_dev->devfn, pin, ret, devno);
 352
 353     return ret;
 354 }
 355
 356 static void mpc85xx_pci_set_irq(void *opaque, int pin, int level)
 357 {
 358     PPCE500PCIState *s = opaque;
 359     qemu_irq *pic = s->irq;
 360
 361     pci_debug("%s: PCI irq %d, level:%d\n", __func__, pin , level);
 362
 363     qemu_set_irq(pic[pin], level);
 364 }
 365
 366 static PCIINTxRoute e500_route_intx_pin_to_irq(void *opaque, int pin)
 367 {
 368     PCIINTxRoute route;
 369     PPCE500PCIState *s = opaque;
 370
 371     route.mode = PCI_INTX_ENABLED;
 372     route.irq = s->irq_num[pin];
 373
 374     pci_debug("%s: PCI irq-pin = %d, irq_num= %d\n", __func__, pin, route.irq);
 375     return route;
 376 }
 377
 378 static const VMStateDescription vmstate_pci_outbound = {
 379     .name = "pci_outbound",
 380     .version_id = 0,
 381     .minimum_version_id = 0,
 382     .fields = (VMStateField[]) {
 383         VMSTATE_UINT32(potar, struct pci_outbound),
 384         VMSTATE_UINT32(potear, struct pci_outbound),
 385         VMSTATE_UINT32(powbar, struct pci_outbound),
 386         VMSTATE_UINT32(powar, struct pci_outbound),
 387         VMSTATE_END_OF_LIST()
 388     }
 389 };
 390
 391 static const VMStateDescription vmstate_pci_inbound = {
 392     .name = "pci_inbound",
 393     .version_id = 0,
 394     .minimum_version_id = 0,
 395     .fields = (VMStateField[]) {
 396         VMSTATE_UINT32(pitar, struct pci_inbound),
 397         VMSTATE_UINT32(piwbar, struct pci_inbound),
 398         VMSTATE_UINT32(piwbear, struct pci_inbound),
 399         VMSTATE_UINT32(piwar, struct pci_inbound),
 400         VMSTATE_END_OF_LIST()
 401     }
 402 };
 403
 404 static const VMStateDescription vmstate_ppce500_pci = {
 405     .name = "ppce500_pci",
 406     .version_id = 1,
 407     .minimum_version_id = 1,
 408     .fields = (VMStateField[]) {
 409         VMSTATE_STRUCT_ARRAY(pob, PPCE500PCIState, PPCE500_PCI_NR_POBS, 1,
 410                              vmstate_pci_outbound, struct pci_outbound),
 411         VMSTATE_STRUCT_ARRAY(pib, PPCE500PCIState, PPCE500_PCI_NR_PIBS, 1,
 412                              vmstate_pci_inbound, struct pci_inbound),
 413         VMSTATE_UINT32(gasket_time, PPCE500PCIState),
 414         VMSTATE_END_OF_LIST()
 415     }
 416 };
 417
 418 #include "exec/address-spaces.h"
 419
 420 static void e500_pcihost_bridge_realize(PCIDevice *d, Error **errp)
 421 {
 422     PPCE500PCIBridgeState *b = PPC_E500_PCI_BRIDGE(d);
 423     PPCE500CCSRState *ccsr = CCSR(container_get(qdev_get_machine(),
 424                                   "/e500-ccsr"));
 425
 426     memory_region_init_alias(&b->bar0, OBJECT(ccsr), "e500-pci-bar0", &ccsr->ccsr_space,
 427                              0, int128_get64(ccsr->ccsr_space.size));
 428     pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &b->bar0);
 429 }
 430
 431 static AddressSpace *e500_pcihost_set_iommu(PCIBus *bus, void *opaque,
 432                                             int devfn)
 433 {
 434     PPCE500PCIState *s = opaque;
 435
 436     return &s->bm_as;
 437 }
 438
 439 static void e500_pcihost_realize(DeviceState *dev, Error **errp)
 440 {
 441     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 442     PCIHostState *h;
 443     PPCE500PCIState *s;
 444     PCIBus *b;
 445     int i;
 446
 447     h = PCI_HOST_BRIDGE(dev);
 448     s = PPC_E500_PCI_HOST_BRIDGE(dev);
 449
 450     for (i = 0; i < ARRAY_SIZE(s->irq); i++) {
 451         sysbus_init_irq(sbd, &s->irq[i]);
 452     }
 453
 454     for (i = 0; i < PCI_NUM_PINS; i++) {
 455         s->irq_num[i] = s->first_pin_irq + i;
 456     }
 457
 458     memory_region_init(&s->pio, OBJECT(s), "pci-pio", PCIE500_PCI_IOLEN);
 459     memory_region_init(&s->busmem, OBJECT(s), "pci bus memory", UINT64_MAX);
 460
 461     /* PIO lives at the bottom of our bus space */
 462     memory_region_add_subregion_overlap(&s->busmem, 0, &s->pio, -2);
 463
 464     b = pci_register_root_bus(dev, NULL, mpc85xx_pci_set_irq,
 465                               mpc85xx_pci_map_irq, s, &s->busmem, &s->pio,
 466                               PCI_DEVFN(s->first_slot, 0), 4, TYPE_PCI_BUS);
 467     h->bus = b;
 468
 469     /* Set up PCI view of memory */
 470     memory_region_init(&s->bm, OBJECT(s), "bm-e500", UINT64_MAX);
 471     memory_region_add_subregion(&s->bm, 0x0, &s->busmem);
 472     address_space_init(&s->bm_as, &s->bm, "pci-bm");
 473     pci_setup_iommu(b, e500_pcihost_set_iommu, s);
 474
 475     pci_create_simple(b, 0, "e500-host-bridge");
 476
 477     memory_region_init(&s->container, OBJECT(h), "pci-container", PCIE500_ALL_SIZE);
 478     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_be_ops, h,
 479                           "pci-conf-idx", 4);
 480     memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops, h,
 481                           "pci-conf-data", 4);
 482     memory_region_init_io(&s->iomem, OBJECT(s), &e500_pci_reg_ops, s,
 483                           "pci.reg", PCIE500_REG_SIZE);
 484     memory_region_add_subregion(&s->container, PCIE500_CFGADDR, &h->conf_mem);
 485     memory_region_add_subregion(&s->container, PCIE500_CFGDATA, &h->data_mem);
 486     memory_region_add_subregion(&s->container, PCIE500_REG_BASE, &s->iomem);
 487     sysbus_init_mmio(sbd, &s->container);
 488     pci_bus_set_route_irq_fn(b, e500_route_intx_pin_to_irq);
 489 }
 490
 491 static void e500_host_bridge_class_init(ObjectClass *klass, void *data)
 492 {
 493     DeviceClass *dc = DEVICE_CLASS(klass);
 494     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 495
 496     k->realize = e500_pcihost_bridge_realize;
 497     k->vendor_id = PCI_VENDOR_ID_FREESCALE;
 498     k->device_id = PCI_DEVICE_ID_MPC8533E;
 499     k->class_id = PCI_CLASS_PROCESSOR_POWERPC;
 500     dc->desc = "Host bridge";
 501     /*
 502      * PCI-facing part of the host bridge, not usable without the
 503      * host-facing part, which can't be device_add'ed, yet.
 504      */
 505     dc->user_creatable = false;
 506 }
 507
 508 static const TypeInfo e500_host_bridge_info = {
 509     .name          = "e500-host-bridge",
 510     .parent        = TYPE_PCI_DEVICE,
 511     .instance_size = sizeof(PPCE500PCIBridgeState),
 512     .class_init    = e500_host_bridge_class_init,
 513     .interfaces = (InterfaceInfo[]) {
 514         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 515         { },
 516     },
 517 };
 518
 519 static Property pcihost_properties[] = {
 520     DEFINE_PROP_UINT32("first_slot", PPCE500PCIState, first_slot, 0x11),
 521     DEFINE_PROP_UINT32("first_pin_irq", PPCE500PCIState, first_pin_irq, 0x1),
 522     DEFINE_PROP_END_OF_LIST(),
 523 };
 524
 525 static void e500_pcihost_class_init(ObjectClass *klass, void *data)
 526 {
 527     DeviceClass *dc = DEVICE_CLASS(klass);
 528
 529     dc->realize = e500_pcihost_realize;
 530     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 531     dc->props = pcihost_properties;
 532     dc->vmsd = &vmstate_ppce500_pci;
 533 }
 534
 535 static const TypeInfo e500_pcihost_info = {
 536     .name          = TYPE_PPC_E500_PCI_HOST_BRIDGE,
 537     .parent        = TYPE_PCI_HOST_BRIDGE,
 538     .instance_size = sizeof(PPCE500PCIState),
 539     .class_init    = e500_pcihost_class_init,
 540 };
 541
 542 static void e500_pci_register_types(void)
 543 {
 544     type_register_static(&e500_pcihost_info);
 545     type_register_static(&e500_host_bridge_info);
 546 }
 547
 548 type_init(e500_pci_register_types)