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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 int xen_pv_init(PCIDevice *pci_dev) | |
73 | { | |
74 | XenPVDevice *d = XEN_PV_DEVICE(pci_dev); | |
75 | uint8_t *pci_conf; | |
76 | ||
77 | pci_conf = pci_dev->config; | |
78 | ||
79 | pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id); | |
80 | pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id); | |
81 | pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id); | |
82 | pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id); | |
83 | pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision); | |
84 | ||
85 | pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY); | |
86 | ||
87 | pci_config_set_prog_interface(pci_conf, 0); | |
88 | ||
89 | pci_conf[PCI_INTERRUPT_PIN] = 1; | |
90 | ||
91 | memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d, | |
92 | "mmio", d->size); | |
93 | ||
94 | pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH, | |
95 | &d->mmio); | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
100 | static Property xen_pv_props[] = { | |
101 | DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN), | |
102 | DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, PCI_DEVICE_ID_XEN_PVDEVICE), | |
103 | DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01), | |
104 | DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000), | |
105 | DEFINE_PROP_END_OF_LIST() | |
106 | }; | |
107 | ||
108 | static void xen_pv_class_init(ObjectClass *klass, void *data) | |
109 | { | |
110 | DeviceClass *dc = DEVICE_CLASS(klass); | |
111 | PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); | |
112 | ||
113 | k->init = xen_pv_init; | |
114 | k->class_id = PCI_CLASS_SYSTEM_OTHER; | |
115 | dc->desc = "Xen PV Device"; | |
116 | dc->props = xen_pv_props; | |
117 | } | |
118 | ||
119 | static const TypeInfo xen_pv_type_info = { | |
120 | .name = TYPE_XEN_PV_DEVICE, | |
121 | .parent = TYPE_PCI_DEVICE, | |
122 | .instance_size = sizeof(XenPVDevice), | |
123 | .class_init = xen_pv_class_init, | |
124 | }; | |
125 | ||
126 | static void xen_pv_register_types(void) | |
127 | { | |
128 | type_register_static(&xen_pv_type_info); | |
129 | } | |
130 | ||
131 | type_init(xen_pv_register_types) |