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 44 typedef 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 55 static 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 63 static 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 69 static 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 75 static 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 85 static 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 } 116 117 static 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 }; 124 125 static 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 } 136 137 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 = (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) 154