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 "hw/hw.h"
  35#include "hw/pci/pci.h"
  36#include "trace.h"
  37
  38#define TYPE_XEN_PV_DEVICE  "xen-pvdevice"
  39
  40#define XEN_PV_DEVICE(obj) \
  41     OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE)
  42
  43typedef struct XenPVDevice {
  44    /*< private >*/
  45    PCIDevice       parent_obj;
  46    /*< public >*/
  47    uint16_t        vendor_id;
  48    uint16_t        device_id;
  49    uint8_t         revision;
  50    uint32_t        size;
  51    MemoryRegion    mmio;
  52} XenPVDevice;
  53
  54static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,
  55                                 unsigned size)
  56{
  57    trace_xen_pv_mmio_read(addr);
  58
  59    return ~(uint64_t)0;
  60}
  61
  62static void xen_pv_mmio_write(void *opaque, hwaddr addr,
  63                              uint64_t val, unsigned size)
  64{
  65    trace_xen_pv_mmio_write(addr);
  66}
  67
  68static const MemoryRegionOps xen_pv_mmio_ops = {
  69    .read = &xen_pv_mmio_read,
  70    .write = &xen_pv_mmio_write,
  71    .endianness = DEVICE_LITTLE_ENDIAN,
  72};
  73
  74static void xen_pv_realize(PCIDevice *pci_dev, Error **errp)
  75{
  76    XenPVDevice *d = XEN_PV_DEVICE(pci_dev);
  77    uint8_t *pci_conf;
  78
  79    /* device-id property must always be supplied */
  80    if (d->device_id == 0xffff) {
  81        error_setg(errp, "Device ID invalid, it must always be supplied");
  82        return;
  83    }
  84
  85    pci_conf = pci_dev->config;
  86
  87    pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);
  88    pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);
  89    pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);
  90    pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);
  91    pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);
  92
  93    pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);
  94
  95    pci_config_set_prog_interface(pci_conf, 0);
  96
  97    pci_conf[PCI_INTERRUPT_PIN] = 1;
  98
  99    memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,
 100                          "mmio", d->size);
 101
 102    pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
 103                     &d->mmio);
 104}
 105
 106static Property xen_pv_props[] = {
 107    DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),
 108    DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, 0xffff),
 109    DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),
 110    DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
 111    DEFINE_PROP_END_OF_LIST()
 112};
 113
 114static void xen_pv_class_init(ObjectClass *klass, void *data)
 115{
 116    DeviceClass *dc = DEVICE_CLASS(klass);
 117    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 118
 119    k->realize = xen_pv_realize;
 120    k->class_id = PCI_CLASS_SYSTEM_OTHER;
 121    dc->desc = "Xen PV Device";
 122    dc->props = xen_pv_props;
 123}
 124
 125static const TypeInfo xen_pv_type_info = {
 126    .name          = TYPE_XEN_PV_DEVICE,
 127    .parent        = TYPE_PCI_DEVICE,
 128    .instance_size = sizeof(XenPVDevice),
 129    .class_init    = xen_pv_class_init,
 130};
 131
 132static void xen_pv_register_types(void)
 133{
 134    type_register_static(&xen_pv_type_info);
 135}
 136
 137type_init(xen_pv_register_types)
 138