qemu

xen_pvdevice.c (4835B)

---

 /* 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/pci/pci.h"
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
 #include "trace.h"
 #include "qom/object.h"
 
 #define TYPE_XEN_PV_DEVICE  "xen-pvdevice"
 
 OBJECT_DECLARE_SIMPLE_TYPE(XenPVDevice, XEN_PV_DEVICE)
 
 struct XenPVDevice {
     /*< private >*/
     PCIDevice       parent_obj;
     /*< public >*/
     uint16_t        vendor_id;
     uint16_t        device_id;
     uint8_t         revision;
     uint32_t        size;
     MemoryRegion    mmio;
 };
 
 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";
     device_class_set_props(dc, 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)