LXR qemu/hw/i386/xen/xen

   1/* Copyright (c) Citrix Systems Inc.
   2 * All rights reserved.
   3 *
   4 * Redistribution and use in source and binary forms,
   5 * with or without modification, are permitted provided
   6 * that the following conditions are met:
   7 *
   8 * *   Redistributions of source code must retain the above
   9 *     copyright notice, this list of conditions and the
  10 *     following disclaimer.
  11 * *   Redistributions in binary form must reproduce the above
  12 *     copyright notice, this list of conditions and the
  13 *     following disclaimer in the documentation and/or other
  14 *     materials provided with the distribution.
  15 *
  16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  17 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
  21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29 * SUCH DAMAGE.
  30 */
  31
  32#include "qemu/osdep.h"
  33#include "qapi/error.h"
  34#include "qemu/module.h"
  35#include "hw/hw.h"
  36#include "hw/pci/pci.h"
  37#include "trace.h"
  38
  39#define TYPE_XEN_PV_DEVICE  "xen-pvdevice"
  40
  41#define XEN_PV_DEVICE(obj) \
  42     OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE)
  43
  44typedef struct XenPVDevice {
  45    /*< private >*/
  46    PCIDevice       parent_obj;
  47    /*< public >*/
  48    uint16_t        vendor_id;
  49    uint16_t        device_id;
  50    uint8_t         revision;
  51    uint32_t        size;
  52    MemoryRegion    mmio;
  53} XenPVDevice;
  54
  55static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,
  56                                 unsigned size)
  57{
  58    trace_xen_pv_mmio_read(addr);
  59
  60    return ~(uint64_t)0;
  61}
  62
  63static void xen_pv_mmio_write(void *opaque, hwaddr addr,
  64                              uint64_t val, unsigned size)
  65{
  66    trace_xen_pv_mmio_write(addr);
  67}
  68
  69static const MemoryRegionOps xen_pv_mmio_ops = {
  70    .read = &xen_pv_mmio_read,
  71    .write = &xen_pv_mmio_write,
  72    .endianness = DEVICE_LITTLE_ENDIAN,
  73};
  74
  75static const VMStateDescription vmstate_xen_pvdevice = {
  76    .name = "xen-pvdevice",
  77    .version_id = 1,
  78    .minimum_version_id = 1,
  79    .fields = (VMStateField[]) {
  80        VMSTATE_PCI_DEVICE(parent_obj, XenPVDevice),
  81        VMSTATE_END_OF_LIST()
  82    }
  83};
  84
  85static void xen_pv_realize(PCIDevice *pci_dev, Error **errp)
  86{
  87    XenPVDevice *d = XEN_PV_DEVICE(pci_dev);
  88    uint8_t *pci_conf;
  89
  90    /* device-id property must always be supplied */
  91    if (d->device_id == 0xffff) {
  92        error_setg(errp, "Device ID invalid, it must always be supplied");
  93        return;
  94    }
  95
  96    pci_conf = pci_dev->config;
  97
  98    pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);
  99    pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);
 100    pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);
 101    pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);
 102    pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);
 103
 104    pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);
 105
 106    pci_config_set_prog_interface(pci_conf, 0);
 107
 108    pci_conf[PCI_INTERRUPT_PIN] = 1;
 109
 110    memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,
 111                          "mmio", d->size);
 112
 113    pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
 114                     &d->mmio);
 115}
 116
 117static Property xen_pv_props[] = {
 118    DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),
 119    DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, 0xffff),
 120    DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),
 121    DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
 122    DEFINE_PROP_END_OF_LIST()
 123};
 124
 125static void xen_pv_class_init(ObjectClass *klass, void *data)
 126{
 127    DeviceClass *dc = DEVICE_CLASS(klass);
 128    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 129
 130    k->realize = xen_pv_realize;
 131    k->class_id = PCI_CLASS_SYSTEM_OTHER;
 132    dc->desc = "Xen PV Device";
 133    dc->props = xen_pv_props;
 134    dc->vmsd = &vmstate_xen_pvdevice;
 135}
 136
 137static const TypeInfo xen_pv_type_info = {
 138    .name          = TYPE_XEN_PV_DEVICE,
 139    .parent        = TYPE_PCI_DEVICE,
 140    .instance_size = sizeof(XenPVDevice),
 141    .class_init    = xen_pv_class_init,
 142    .interfaces = (InterfaceInfo[]) {
 143        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 144        { },
 145    },
 146};
 147
 148static void xen_pv_register_types(void)
 149{
 150    type_register_static(&xen_pv_type_info);
 151}
 152
 153type_init(xen_pv_register_types)
 154