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 "hw/hw.h" 33 #include "hw/pci/pci.h" 34 #include "trace.h" 35 36 #define TYPE_XEN_PV_DEVICE "xen-pvdevice" 37 38 #define XEN_PV_DEVICE(obj) \ 39 OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE) 40 41 typedef struct XenPVDevice { 42 /*< private >*/ 43 PCIDevice parent_obj; 44 /*< public >*/ 45 uint16_t vendor_id; 46 uint16_t device_id; 47 uint8_t revision; 48 uint32_t size; 49 MemoryRegion mmio; 50 } XenPVDevice; 51 52 static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr, 53 unsigned size) 54 { 55 trace_xen_pv_mmio_read(addr); 56 57 return ~(uint64_t)0; 58 } 59 60 static void xen_pv_mmio_write(void *opaque, hwaddr addr, 61 uint64_t val, unsigned size) 62 { 63 trace_xen_pv_mmio_write(addr); 64 } 65 66 static const MemoryRegionOps xen_pv_mmio_ops = { 67 .read = &xen_pv_mmio_read, 68 .write = &xen_pv_mmio_write, 69 .endianness = DEVICE_LITTLE_ENDIAN, 70 }; 71 72 static void xen_pv_realize(PCIDevice *pci_dev, Error **errp) 73 { 74 XenPVDevice *d = XEN_PV_DEVICE(pci_dev); 75 uint8_t *pci_conf; 76 77 /* device-id property must always be supplied */ 78 if (d->device_id == 0xffff) { 79 error_setg(errp, "Device ID invalid, it must always be supplied"); 80 return; 81 } 82 83 pci_conf = pci_dev->config; 84 85 pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id); 86 pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id); 87 pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id); 88 pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id); 89 pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision); 90 91 pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY); 92 93 pci_config_set_prog_interface(pci_conf, 0); 94 95 pci_conf[PCI_INTERRUPT_PIN] = 1; 96 97 memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d, 98 "mmio", d->size); 99 100 pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH, 101 &d->mmio); 102 } 103 104 static Property xen_pv_props[] = { 105 DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN), 106 DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, 0xffff), 107 DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01), 108 DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000), 109 DEFINE_PROP_END_OF_LIST() 110 }; 111 112 static void xen_pv_class_init(ObjectClass *klass, void *data) 113 { 114 DeviceClass *dc = DEVICE_CLASS(klass); 115 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 116 117 k->realize = xen_pv_realize; 118 k->class_id = PCI_CLASS_SYSTEM_OTHER; 119 dc->desc = "Xen PV Device"; 120 dc->props = xen_pv_props; 121 } 122 123 static const TypeInfo xen_pv_type_info = { 124 .name = TYPE_XEN_PV_DEVICE, 125 .parent = TYPE_PCI_DEVICE, 126 .instance_size = sizeof(XenPVDevice), 127 .class_init = xen_pv_class_init, 128 }; 129 130 static void xen_pv_register_types(void) 131 { 132 type_register_static(&xen_pv_type_info); 133 } 134 135 type_init(xen_pv_register_types) 136