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/* Copyright (c) Citrix Systems Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "hw/hw.h"
#include "hw/pci/pci.h"
#include "migration/vmstate.h"
#include "trace.h"
#define TYPE_XEN_PV_DEVICE "xen-pvdevice"
#define XEN_PV_DEVICE(obj) \
OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE)
typedef struct XenPVDevice {
/*< private >*/
PCIDevice parent_obj;
/*< public >*/
uint16_t vendor_id;
uint16_t device_id;
uint8_t revision;
uint32_t size;
MemoryRegion mmio;
} XenPVDevice;
static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,
unsigned size)
{
trace_xen_pv_mmio_read(addr);
return ~(uint64_t)0;
}
static void xen_pv_mmio_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
trace_xen_pv_mmio_write(addr);
}
static const MemoryRegionOps xen_pv_mmio_ops = {
.read = &xen_pv_mmio_read,
.write = &xen_pv_mmio_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const VMStateDescription vmstate_xen_pvdevice = {
.name = "xen-pvdevice",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj, XenPVDevice),
VMSTATE_END_OF_LIST()
}
};
static void xen_pv_realize(PCIDevice *pci_dev, Error **errp)
{
XenPVDevice *d = XEN_PV_DEVICE(pci_dev);
uint8_t *pci_conf;
/* device-id property must always be supplied */
if (d->device_id == 0xffff) {
error_setg(errp, "Device ID invalid, it must always be supplied");
return;
}
pci_conf = pci_dev->config;
pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);
pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);
pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);
pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);
pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);
pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);
pci_config_set_prog_interface(pci_conf, 0);
pci_conf[PCI_INTERRUPT_PIN] = 1;
memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,
"mmio", d->size);
pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
&d->mmio);
}
static Property xen_pv_props[] = {
DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),
DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, 0xffff),
DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),
DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
DEFINE_PROP_END_OF_LIST()
};
static void xen_pv_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = xen_pv_realize;
k->class_id = PCI_CLASS_SYSTEM_OTHER;
dc->desc = "Xen PV Device";
dc->props = xen_pv_props;
dc->vmsd = &vmstate_xen_pvdevice;
}
static const TypeInfo xen_pv_type_info = {
.name = TYPE_XEN_PV_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(XenPVDevice),
.class_init = xen_pv_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static void xen_pv_register_types(void)
{
type_register_static(&xen_pv_type_info);
}
type_init(xen_pv_register_types)
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