hw/pci-host/q35.c

   1 /*
   2  * QEMU MCH/ICH9 PCI Bridge Emulation
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  * Copyright (c) 2009, 2010, 2011
   6  *               Isaku Yamahata <yamahata at valinux co jp>
   7  *               VA Linux Systems Japan K.K.
   8  * Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
   9  *
  10  * This is based on piix_pci.c, but heavily modified.
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a copy
  13  * of this software and associated documentation files (the "Software"), to deal
  14  * in the Software without restriction, including without limitation the rights
  15  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  16  * copies of the Software, and to permit persons to whom the Software is
  17  * furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included in
  20  * all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  25  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  27  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  28  * THE SOFTWARE.
  29  */
  30 #include "hw/hw.h"
  31 #include "hw/pci-host/q35.h"
  32
  33 /****************************************************************************
  34  * Q35 host
  35  */
  36
  37 static int q35_host_init(SysBusDevice *dev)
  38 {
  39     PCIBus *b;
  40     PCIHostState *pci = FROM_SYSBUS(PCIHostState, dev);
  41     Q35PCIHost *s = Q35_HOST_DEVICE(&dev->qdev);
  42
  43     memory_region_init_io(&pci->conf_mem, OBJECT(pci), &pci_host_conf_le_ops, pci,
  44                           "pci-conf-idx", 4);
  45     sysbus_add_io(dev, MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem);
  46     sysbus_init_ioports(&pci->busdev, MCH_HOST_BRIDGE_CONFIG_ADDR, 4);
  47
  48     memory_region_init_io(&pci->data_mem, OBJECT(pci), &pci_host_data_le_ops, pci,
  49                           "pci-conf-data", 4);
  50     sysbus_add_io(dev, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem);
  51     sysbus_init_ioports(&pci->busdev, MCH_HOST_BRIDGE_CONFIG_DATA, 4);
  52
  53     if (pcie_host_init(&s->host) < 0) {
  54         return -1;
  55     }
  56     b = pci_bus_new(&s->host.pci.busdev.qdev, "pcie.0",
  57                     s->mch.pci_address_space, s->mch.address_space_io,
  58                     0, TYPE_PCIE_BUS);
  59     s->host.pci.bus = b;
  60     qdev_set_parent_bus(DEVICE(&s->mch), BUS(b));
  61     qdev_init_nofail(DEVICE(&s->mch));
  62
  63     return 0;
  64 }
  65
  66 static Property mch_props[] = {
  67     DEFINE_PROP_UINT64("MCFG", Q35PCIHost, host.base_addr,
  68                         MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT),
  69     DEFINE_PROP_END_OF_LIST(),
  70 };
  71
  72 static void q35_host_class_init(ObjectClass *klass, void *data)
  73 {
  74     DeviceClass *dc = DEVICE_CLASS(klass);
  75     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
  76
  77     k->init = q35_host_init;
  78     dc->props = mch_props;
  79     dc->fw_name = "pci";
  80 }
  81
  82 static void q35_host_initfn(Object *obj)
  83 {
  84     Q35PCIHost *s = Q35_HOST_DEVICE(obj);
  85
  86     object_initialize(&s->mch, TYPE_MCH_PCI_DEVICE);
  87     object_property_add_child(OBJECT(s), "mch", OBJECT(&s->mch), NULL);
  88     qdev_prop_set_uint32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0));
  89     qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false);
  90 }
  91
  92 static const TypeInfo q35_host_info = {
  93     .name       = TYPE_Q35_HOST_DEVICE,
  94     .parent     = TYPE_PCIE_HOST_BRIDGE,
  95     .instance_size = sizeof(Q35PCIHost),
  96     .instance_init = q35_host_initfn,
  97     .class_init = q35_host_class_init,
  98 };
  99
 100 /****************************************************************************
 101  * MCH D0:F0
 102  */
 103
 104 /* PCIe MMCFG */
 105 static void mch_update_pciexbar(MCHPCIState *mch)
 106 {
 107     PCIDevice *pci_dev = &mch->d;
 108     BusState *bus = qdev_get_parent_bus(&pci_dev->qdev);
 109     DeviceState *qdev = bus->parent;
 110     Q35PCIHost *s = Q35_HOST_DEVICE(qdev);
 111
 112     uint64_t pciexbar;
 113     int enable;
 114     uint64_t addr;
 115     uint64_t addr_mask;
 116     uint32_t length;
 117
 118     pciexbar = pci_get_quad(pci_dev->config + MCH_HOST_BRIDGE_PCIEXBAR);
 119     enable = pciexbar & MCH_HOST_BRIDGE_PCIEXBAREN;
 120     addr_mask = MCH_HOST_BRIDGE_PCIEXBAR_ADMSK;
 121     switch (pciexbar & MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_MASK) {
 122     case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_256M:
 123         length = 256 * 1024 * 1024;
 124         break;
 125     case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_128M:
 126         length = 128 * 1024 * 1024;
 127         addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK |
 128             MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK;
 129         break;
 130     case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_64M:
 131         length = 64 * 1024 * 1024;
 132         addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK;
 133         break;
 134     case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_RVD:
 135     default:
 136         enable = 0;
 137         length = 0;
 138         abort();
 139         break;
 140     }
 141     addr = pciexbar & addr_mask;
 142     pcie_host_mmcfg_update(&s->host, enable, addr, length);
 143 }
 144
 145 /* PAM */
 146 static void mch_update_pam(MCHPCIState *mch)
 147 {
 148     int i;
 149
 150     memory_region_transaction_begin();
 151     for (i = 0; i < 13; i++) {
 152         pam_update(&mch->pam_regions[i], i,
 153                    mch->d.config[MCH_HOST_BRIDGE_PAM0 + ((i + 1) / 2)]);
 154     }
 155     memory_region_transaction_commit();
 156 }
 157
 158 /* SMRAM */
 159 static void mch_update_smram(MCHPCIState *mch)
 160 {
 161     memory_region_transaction_begin();
 162     smram_update(&mch->smram_region, mch->d.config[MCH_HOST_BRDIGE_SMRAM],
 163                     mch->smm_enabled);
 164     memory_region_transaction_commit();
 165 }
 166
 167 static void mch_set_smm(int smm, void *arg)
 168 {
 169     MCHPCIState *mch = arg;
 170
 171     memory_region_transaction_begin();
 172     smram_set_smm(&mch->smm_enabled, smm, mch->d.config[MCH_HOST_BRDIGE_SMRAM],
 173                     &mch->smram_region);
 174     memory_region_transaction_commit();
 175 }
 176
 177 static void mch_write_config(PCIDevice *d,
 178                               uint32_t address, uint32_t val, int len)
 179 {
 180     MCHPCIState *mch = MCH_PCI_DEVICE(d);
 181
 182     /* XXX: implement SMRAM.D_LOCK */
 183     pci_default_write_config(d, address, val, len);
 184
 185     if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PAM0,
 186                        MCH_HOST_BRIDGE_PAM_SIZE)) {
 187         mch_update_pam(mch);
 188     }
 189
 190     if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PCIEXBAR,
 191                        MCH_HOST_BRIDGE_PCIEXBAR_SIZE)) {
 192         mch_update_pciexbar(mch);
 193     }
 194
 195     if (ranges_overlap(address, len, MCH_HOST_BRDIGE_SMRAM,
 196                        MCH_HOST_BRDIGE_SMRAM_SIZE)) {
 197         mch_update_smram(mch);
 198     }
 199 }
 200
 201 static void mch_update(MCHPCIState *mch)
 202 {
 203     mch_update_pciexbar(mch);
 204     mch_update_pam(mch);
 205     mch_update_smram(mch);
 206 }
 207
 208 static int mch_post_load(void *opaque, int version_id)
 209 {
 210     MCHPCIState *mch = opaque;
 211     mch_update(mch);
 212     return 0;
 213 }
 214
 215 static const VMStateDescription vmstate_mch = {
 216     .name = "mch",
 217     .version_id = 1,
 218     .minimum_version_id = 1,
 219     .minimum_version_id_old = 1,
 220     .post_load = mch_post_load,
 221     .fields = (VMStateField []) {
 222         VMSTATE_PCI_DEVICE(d, MCHPCIState),
 223         VMSTATE_UINT8(smm_enabled, MCHPCIState),
 224         VMSTATE_END_OF_LIST()
 225     }
 226 };
 227
 228 static void mch_reset(DeviceState *qdev)
 229 {
 230     PCIDevice *d = PCI_DEVICE(qdev);
 231     MCHPCIState *mch = MCH_PCI_DEVICE(d);
 232
 233     pci_set_quad(d->config + MCH_HOST_BRIDGE_PCIEXBAR,
 234                  MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT);
 235
 236     d->config[MCH_HOST_BRDIGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_DEFAULT;
 237
 238     mch_update(mch);
 239 }
 240
 241 static int mch_init(PCIDevice *d)
 242 {
 243     int i;
 244     hwaddr pci_hole64_size;
 245     MCHPCIState *mch = MCH_PCI_DEVICE(d);
 246
 247     /* setup pci memory regions */
 248     memory_region_init_alias(&mch->pci_hole, OBJECT(mch), "pci-hole",
 249                              mch->pci_address_space,
 250                              mch->below_4g_mem_size,
 251                              0x100000000ULL - mch->below_4g_mem_size);
 252     memory_region_add_subregion(mch->system_memory, mch->below_4g_mem_size,
 253                                 &mch->pci_hole);
 254     pci_hole64_size = (sizeof(hwaddr) == 4 ? 0 :
 255                        ((uint64_t)1 << 62));
 256     memory_region_init_alias(&mch->pci_hole_64bit, OBJECT(mch), "pci-hole64",
 257                              mch->pci_address_space,
 258                              0x100000000ULL + mch->above_4g_mem_size,
 259                              pci_hole64_size);
 260     if (pci_hole64_size) {
 261         memory_region_add_subregion(mch->system_memory,
 262                                     0x100000000ULL + mch->above_4g_mem_size,
 263                                     &mch->pci_hole_64bit);
 264     }
 265     /* smram */
 266     cpu_smm_register(&mch_set_smm, mch);
 267     memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region",
 268                              mch->pci_address_space, 0xa0000, 0x20000);
 269     memory_region_add_subregion_overlap(mch->system_memory, 0xa0000,
 270                                         &mch->smram_region, 1);
 271     memory_region_set_enabled(&mch->smram_region, false);
 272     init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory, mch->pci_address_space,
 273              &mch->pam_regions[0], PAM_BIOS_BASE, PAM_BIOS_SIZE);
 274     for (i = 0; i < 12; ++i) {
 275         init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory, mch->pci_address_space,
 276                  &mch->pam_regions[i+1], PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE,
 277                  PAM_EXPAN_SIZE);
 278     }
 279     return 0;
 280 }
 281
 282 static void mch_class_init(ObjectClass *klass, void *data)
 283 {
 284     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 285     DeviceClass *dc = DEVICE_CLASS(klass);
 286
 287     k->init = mch_init;
 288     k->config_write = mch_write_config;
 289     dc->reset = mch_reset;
 290     dc->desc = "Host bridge";
 291     dc->vmsd = &vmstate_mch;
 292     k->vendor_id = PCI_VENDOR_ID_INTEL;
 293     k->device_id = PCI_DEVICE_ID_INTEL_Q35_MCH;
 294     k->revision = MCH_HOST_BRIDGE_REVISION_DEFUALT;
 295     k->class_id = PCI_CLASS_BRIDGE_HOST;
 296 }
 297
 298 static const TypeInfo mch_info = {
 299     .name = TYPE_MCH_PCI_DEVICE,
 300     .parent = TYPE_PCI_DEVICE,
 301     .instance_size = sizeof(MCHPCIState),
 302     .class_init = mch_class_init,
 303 };
 304
 305 static void q35_register(void)
 306 {
 307     type_register_static(&mch_info);
 308     type_register_static(&q35_host_info);
 309 }
 310
 311 type_init(q35_register);