| 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/pci/pci_device.h" |
| 36 | #include "hw/core/qdev-properties.h" |
| 37 | #include "migration/vmstate.h" |
| 38 | #include "trace.h" |
| 39 | #include "qom/object.h" |
| 40 | |
| 41 | #define TYPE_XEN_PV_DEVICE "xen-pvdevice" |
| 42 | |
| 43 | OBJECT_DECLARE_SIMPLE_TYPE(XenPVDevice, XEN_PV_DEVICE) |
| 44 | |
| 45 | struct XenPVDevice { |
| 46 | /*< private >*/ |
| 47 | PCIDevice parent_obj; |
| 48 | /*< public >*/ |
| 49 | uint16_t vendor_id; |
| 50 | uint16_t device_id; |
| 51 | uint8_t revision; |
| 52 | uint32_t size; |
| 53 | MemoryRegion mmio; |
| 54 | }; |
| 55 | |
| 56 | static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr, |
| 57 | unsigned size) |
| 58 | { |
| 59 | trace_xen_pv_mmio_read(addr); |
| 60 | |
| 61 | return ~(uint64_t)0; |
| 62 | } |
| 63 | |
| 64 | static void xen_pv_mmio_write(void *opaque, hwaddr addr, |
| 65 | uint64_t val, unsigned size) |
| 66 | { |
| 67 | trace_xen_pv_mmio_write(addr); |
| 68 | } |
| 69 | |
| 70 | static const MemoryRegionOps xen_pv_mmio_ops = { |
| 71 | .read = &xen_pv_mmio_read, |
| 72 | .write = &xen_pv_mmio_write, |
| 73 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 74 | }; |
| 75 | |
| 76 | static const VMStateDescription vmstate_xen_pvdevice = { |
| 77 | .name = "xen-pvdevice", |
| 78 | .version_id = 1, |
| 79 | .minimum_version_id = 1, |
| 80 | .fields = (const VMStateField[]) { |
| 81 | VMSTATE_PCI_DEVICE(parent_obj, XenPVDevice), |
| 82 | VMSTATE_END_OF_LIST() |
| 83 | } |
| 84 | }; |
| 85 | |
| 86 | static void xen_pv_realize(PCIDevice *pci_dev, Error **errp) |
| 87 | { |
| 88 | XenPVDevice *d = XEN_PV_DEVICE(pci_dev); |
| 89 | uint8_t *pci_conf; |
| 90 | |
| 91 | /* device-id property must always be supplied */ |
| 92 | if (d->device_id == 0xffff) { |
| 93 | error_setg(errp, "Device ID invalid, it must always be supplied"); |
| 94 | return; |
| 95 | } |
| 96 | |
| 97 | pci_conf = pci_dev->config; |
| 98 | |
| 99 | pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id); |
| 100 | pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id); |
| 101 | pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id); |
| 102 | pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id); |
| 103 | pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision); |
| 104 | |
| 105 | pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY); |
| 106 | |
| 107 | pci_config_set_prog_interface(pci_conf, 0); |
| 108 | |
| 109 | pci_conf[PCI_INTERRUPT_PIN] = 1; |
| 110 | |
| 111 | memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d, |
| 112 | "mmio", d->size); |
| 113 | |
| 114 | pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH, |
| 115 | &d->mmio); |
| 116 | } |
| 117 | |
| 118 | static const Property xen_pv_props[] = { |
| 119 | DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN), |
| 120 | DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, 0xffff), |
| 121 | DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01), |
| 122 | DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000), |
| 123 | }; |
| 124 | |
| 125 | static void xen_pv_class_init(ObjectClass *klass, const 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 | device_class_set_props(dc, xen_pv_props); |
| 134 | dc->vmsd = &vmstate_xen_pvdevice; |
| 135 | } |
| 136 | |
| 137 | static 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 = (const InterfaceInfo[]) { |
| 143 | { INTERFACE_CONVENTIONAL_PCI_DEVICE }, |
| 144 | { }, |
| 145 | }, |
| 146 | }; |
| 147 | |
| 148 | static void xen_pv_register_types(void) |
| 149 | { |
| 150 | type_register_static(&xen_pv_type_info); |
| 151 | } |
| 152 | |
| 153 | type_init(xen_pv_register_types) |