hw/pci-host/gpex.c

   1 /*
   2  * QEMU Generic PCI Express Bridge Emulation
   3  *
   4  * Copyright (C) 2015 Alexander Graf <agraf@suse.de>
   5  *
   6  * Code loosely based on q35.c.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  *
  26  * Check out these documents for more information on the device:
  27  *
  28  * http://www.kernel.org/doc/Documentation/devicetree/bindings/pci/host-generic-pci.txt
  29  * http://www.firmware.org/1275/practice/imap/imap0_9d.pdf
  30  */
  31 #include "hw/hw.h"
  32 #include "hw/pci-host/gpex.h"
  33
  34 /****************************************************************************
  35  * GPEX host
  36  */
  37
  38 static void gpex_set_irq(void *opaque, int irq_num, int level)
  39 {
  40     GPEXHost *s = opaque;
  41
  42     qemu_set_irq(s->irq[irq_num], level);
  43 }
  44
  45 static void gpex_host_realize(DeviceState *dev, Error **errp)
  46 {
  47     PCIHostState *pci = PCI_HOST_BRIDGE(dev);
  48     GPEXHost *s = GPEX_HOST(dev);
  49     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  50     PCIExpressHost *pex = PCIE_HOST_BRIDGE(dev);
  51     int i;
  52
  53     pcie_host_mmcfg_init(pex, PCIE_MMCFG_SIZE_MAX);
  54     memory_region_init(&s->io_mmio, OBJECT(s), "gpex_mmio", UINT64_MAX);
  55     memory_region_init(&s->io_ioport, OBJECT(s), "gpex_ioport", 64 * 1024);
  56
  57     sysbus_init_mmio(sbd, &pex->mmio);
  58     sysbus_init_mmio(sbd, &s->io_mmio);
  59     sysbus_init_mmio(sbd, &s->io_ioport);
  60     for (i = 0; i < GPEX_NUM_IRQS; i++) {
  61         sysbus_init_irq(sbd, &s->irq[i]);
  62     }
  63
  64     pci->bus = pci_register_bus(dev, "pcie.0", gpex_set_irq,
  65                                 pci_swizzle_map_irq_fn, s, &s->io_mmio,
  66                                 &s->io_ioport, 0, 4, TYPE_PCIE_BUS);
  67
  68     qdev_set_parent_bus(DEVICE(&s->gpex_root), BUS(pci->bus));
  69     qdev_init_nofail(DEVICE(&s->gpex_root));
  70 }
  71
  72 static const char *gpex_host_root_bus_path(PCIHostState *host_bridge,
  73                                           PCIBus *rootbus)
  74 {
  75     return "0000:00";
  76 }
  77
  78 static void gpex_host_class_init(ObjectClass *klass, void *data)
  79 {
  80     DeviceClass *dc = DEVICE_CLASS(klass);
  81     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
  82
  83     hc->root_bus_path = gpex_host_root_bus_path;
  84     dc->realize = gpex_host_realize;
  85     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
  86     dc->fw_name = "pci";
  87 }
  88
  89 static void gpex_host_initfn(Object *obj)
  90 {
  91     GPEXHost *s = GPEX_HOST(obj);
  92     GPEXRootState *root = &s->gpex_root;
  93
  94     object_initialize(root, sizeof(*root), TYPE_GPEX_ROOT_DEVICE);
  95     object_property_add_child(obj, "gpex_root", OBJECT(root), NULL);
  96     qdev_prop_set_uint32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
  97     qdev_prop_set_bit(DEVICE(root), "multifunction", false);
  98 }
  99
 100 static const TypeInfo gpex_host_info = {
 101     .name       = TYPE_GPEX_HOST,
 102     .parent     = TYPE_PCIE_HOST_BRIDGE,
 103     .instance_size = sizeof(GPEXHost),
 104     .instance_init = gpex_host_initfn,
 105     .class_init = gpex_host_class_init,
 106 };
 107
 108 /****************************************************************************
 109  * GPEX Root D0:F0
 110  */
 111
 112 static const VMStateDescription vmstate_gpex_root = {
 113     .name = "gpex_root",
 114     .version_id = 1,
 115     .minimum_version_id = 1,
 116     .fields = (VMStateField[]) {
 117         VMSTATE_PCI_DEVICE(parent_obj, GPEXRootState),
 118         VMSTATE_END_OF_LIST()
 119     }
 120 };
 121
 122 static void gpex_root_class_init(ObjectClass *klass, void *data)
 123 {
 124     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 125     DeviceClass *dc = DEVICE_CLASS(klass);
 126
 127     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 128     dc->desc = "QEMU generic PCIe host bridge";
 129     dc->vmsd = &vmstate_gpex_root;
 130     k->vendor_id = PCI_VENDOR_ID_REDHAT;
 131     k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_HOST;
 132     k->revision = 0;
 133     k->class_id = PCI_CLASS_BRIDGE_HOST;
 134     /*
 135      * PCI-facing part of the host bridge, not usable without the
 136      * host-facing part, which can't be device_add'ed, yet.
 137      */
 138     dc->cannot_instantiate_with_device_add_yet = true;
 139 }
 140
 141 static const TypeInfo gpex_root_info = {
 142     .name = TYPE_GPEX_ROOT_DEVICE,
 143     .parent = TYPE_PCI_DEVICE,
 144     .instance_size = sizeof(GPEXRootState),
 145     .class_init = gpex_root_class_init,
 146 };
 147
 148 static void gpex_register(void)
 149 {
 150     type_register_static(&gpex_root_info);
 151     type_register_static(&gpex_host_info);
 152 }
 153
 154 type_init(gpex_register)