Add qemu 2.4.0
[kvmfornfv.git] / qemu / hw / pci-host / gpex.c
1 /*
2  * QEMU Generic PCI Express Bridge Emulation
3  *
4  * Copyright (C) 2015 Alexander Graf <agraf@suse.de>
5  *
6  * Code loosely based on q35.c.
7  *
8  * Permission is hereby granted, free of charge, to any person obtaining a copy
9  * of this software and associated documentation files (the "Software"), to deal
10  * in the Software without restriction, including without limitation the rights
11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12  * copies of the Software, and to permit persons to whom the Software is
13  * furnished to do so, subject to the following conditions:
14  *
15  * The above copyright notice and this permission notice shall be included in
16  * all copies or substantial portions of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24  * THE SOFTWARE.
25  *
26  * Check out these documents for more information on the device:
27  *
28  * http://www.kernel.org/doc/Documentation/devicetree/bindings/pci/host-generic-pci.txt
29  * http://www.firmware.org/1275/practice/imap/imap0_9d.pdf
30  */
31 #include "hw/hw.h"
32 #include "hw/pci-host/gpex.h"
33
34 /****************************************************************************
35  * GPEX host
36  */
37
38 static void gpex_set_irq(void *opaque, int irq_num, int level)
39 {
40     GPEXHost *s = opaque;
41
42     qemu_set_irq(s->irq[irq_num], level);
43 }
44
45 static void gpex_host_realize(DeviceState *dev, Error **errp)
46 {
47     PCIHostState *pci = PCI_HOST_BRIDGE(dev);
48     GPEXHost *s = GPEX_HOST(dev);
49     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
50     PCIExpressHost *pex = PCIE_HOST_BRIDGE(dev);
51     int i;
52
53     pcie_host_mmcfg_init(pex, PCIE_MMCFG_SIZE_MAX);
54     memory_region_init(&s->io_mmio, OBJECT(s), "gpex_mmio", UINT64_MAX);
55     memory_region_init(&s->io_ioport, OBJECT(s), "gpex_ioport", 64 * 1024);
56
57     sysbus_init_mmio(sbd, &pex->mmio);
58     sysbus_init_mmio(sbd, &s->io_mmio);
59     sysbus_init_mmio(sbd, &s->io_ioport);
60     for (i = 0; i < GPEX_NUM_IRQS; i++) {
61         sysbus_init_irq(sbd, &s->irq[i]);
62     }
63
64     pci->bus = pci_register_bus(dev, "pcie.0", gpex_set_irq,
65                                 pci_swizzle_map_irq_fn, s, &s->io_mmio,
66                                 &s->io_ioport, 0, 4, TYPE_PCIE_BUS);
67
68     qdev_set_parent_bus(DEVICE(&s->gpex_root), BUS(pci->bus));
69     qdev_init_nofail(DEVICE(&s->gpex_root));
70 }
71
72 static const char *gpex_host_root_bus_path(PCIHostState *host_bridge,
73                                           PCIBus *rootbus)
74 {
75     return "0000:00";
76 }
77
78 static void gpex_host_class_init(ObjectClass *klass, void *data)
79 {
80     DeviceClass *dc = DEVICE_CLASS(klass);
81     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
82
83     hc->root_bus_path = gpex_host_root_bus_path;
84     dc->realize = gpex_host_realize;
85     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
86     dc->fw_name = "pci";
87 }
88
89 static void gpex_host_initfn(Object *obj)
90 {
91     GPEXHost *s = GPEX_HOST(obj);
92     GPEXRootState *root = &s->gpex_root;
93
94     object_initialize(root, sizeof(*root), TYPE_GPEX_ROOT_DEVICE);
95     object_property_add_child(obj, "gpex_root", OBJECT(root), NULL);
96     qdev_prop_set_uint32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
97     qdev_prop_set_bit(DEVICE(root), "multifunction", false);
98 }
99
100 static const TypeInfo gpex_host_info = {
101     .name       = TYPE_GPEX_HOST,
102     .parent     = TYPE_PCIE_HOST_BRIDGE,
103     .instance_size = sizeof(GPEXHost),
104     .instance_init = gpex_host_initfn,
105     .class_init = gpex_host_class_init,
106 };
107
108 /****************************************************************************
109  * GPEX Root D0:F0
110  */
111
112 static const VMStateDescription vmstate_gpex_root = {
113     .name = "gpex_root",
114     .version_id = 1,
115     .minimum_version_id = 1,
116     .fields = (VMStateField[]) {
117         VMSTATE_PCI_DEVICE(parent_obj, GPEXRootState),
118         VMSTATE_END_OF_LIST()
119     }
120 };
121
122 static void gpex_root_class_init(ObjectClass *klass, void *data)
123 {
124     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
125     DeviceClass *dc = DEVICE_CLASS(klass);
126
127     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
128     dc->desc = "QEMU generic PCIe host bridge";
129     dc->vmsd = &vmstate_gpex_root;
130     k->vendor_id = PCI_VENDOR_ID_REDHAT;
131     k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_HOST;
132     k->revision = 0;
133     k->class_id = PCI_CLASS_BRIDGE_HOST;
134     /*
135      * PCI-facing part of the host bridge, not usable without the
136      * host-facing part, which can't be device_add'ed, yet.
137      */
138     dc->cannot_instantiate_with_device_add_yet = true;
139 }
140
141 static const TypeInfo gpex_root_info = {
142     .name = TYPE_GPEX_ROOT_DEVICE,
143     .parent = TYPE_PCI_DEVICE,
144     .instance_size = sizeof(GPEXRootState),
145     .class_init = gpex_root_class_init,
146 };
147
148 static void gpex_register(void)
149 {
150     type_register_static(&gpex_root_info);
151     type_register_static(&gpex_host_info);
152 }
153
154 type_init(gpex_register)