1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/*
* PCI Expander Bridge Device Emulation
*
* Copyright (C) 2015 Red Hat Inc
*
* Authors:
* Marcel Apfelbaum <marcel@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "hw/pci/pci.h"
#include "hw/pci/pci_bus.h"
#include "hw/pci/pci_host.h"
#include "hw/pci/pci_bus.h"
#include "hw/i386/pc.h"
#include "qemu/range.h"
#include "qemu/error-report.h"
#include "sysemu/numa.h"
#define TYPE_PXB_BUS "pxb-bus"
#define PXB_BUS(obj) OBJECT_CHECK(PXBBus, (obj), TYPE_PXB_BUS)
typedef struct PXBBus {
/*< private >*/
PCIBus parent_obj;
/*< public >*/
char bus_path[8];
} PXBBus;
#define TYPE_PXB_DEVICE "pxb"
#define PXB_DEV(obj) OBJECT_CHECK(PXBDev, (obj), TYPE_PXB_DEVICE)
typedef struct PXBDev {
/*< private >*/
PCIDevice parent_obj;
/*< public >*/
uint8_t bus_nr;
uint16_t numa_node;
} PXBDev;
#define TYPE_PXB_HOST "pxb-host"
static int pxb_bus_num(PCIBus *bus)
{
PXBDev *pxb = PXB_DEV(bus->parent_dev);
return pxb->bus_nr;
}
static bool pxb_is_root(PCIBus *bus)
{
return true; /* by definition */
}
static uint16_t pxb_bus_numa_node(PCIBus *bus)
{
PXBDev *pxb = PXB_DEV(bus->parent_dev);
return pxb->numa_node;
}
static void pxb_bus_class_init(ObjectClass *class, void *data)
{
PCIBusClass *pbc = PCI_BUS_CLASS(class);
pbc->bus_num = pxb_bus_num;
pbc->is_root = pxb_is_root;
pbc->numa_node = pxb_bus_numa_node;
}
static const TypeInfo pxb_bus_info = {
.name = TYPE_PXB_BUS,
.parent = TYPE_PCI_BUS,
.instance_size = sizeof(PXBBus),
.class_init = pxb_bus_class_init,
};
static const char *pxb_host_root_bus_path(PCIHostState *host_bridge,
PCIBus *rootbus)
{
PXBBus *bus = PXB_BUS(rootbus);
snprintf(bus->bus_path, 8, "0000:%02x", pxb_bus_num(rootbus));
return bus->bus_path;
}
static void pxb_host_class_init(ObjectClass *class, void *data)
{
DeviceClass *dc = DEVICE_CLASS(class);
PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(class);
dc->fw_name = "pci";
hc->root_bus_path = pxb_host_root_bus_path;
}
static const TypeInfo pxb_host_info = {
.name = TYPE_PXB_HOST,
.parent = TYPE_PCI_HOST_BRIDGE,
.class_init = pxb_host_class_init,
};
/*
* Registers the PXB bus as a child of the i440fx root bus.
*
* Returns 0 on successs, -1 if i440fx host was not
* found or the bus number is already in use.
*/
static int pxb_register_bus(PCIDevice *dev, PCIBus *pxb_bus)
{
PCIBus *bus = dev->bus;
int pxb_bus_num = pci_bus_num(pxb_bus);
if (bus->parent_dev) {
error_report("PXB devices can be attached only to root bus.");
return -1;
}
QLIST_FOREACH(bus, &bus->child, sibling) {
if (pci_bus_num(bus) == pxb_bus_num) {
error_report("Bus %d is already in use.", pxb_bus_num);
return -1;
}
}
QLIST_INSERT_HEAD(&dev->bus->child, pxb_bus, sibling);
return 0;
}
static int pxb_map_irq_fn(PCIDevice *pci_dev, int pin)
{
PCIDevice *pxb = pci_dev->bus->parent_dev;
/*
* The bios does not index the pxb slot number when
* it computes the IRQ because it resides on bus 0
* and not on the current bus.
* However QEMU routes the irq through bus 0 and adds
* the pxb slot to the IRQ computation of the PXB
* device.
*
* Synchronize between bios and QEMU by canceling
* pxb's effect.
*/
return pin - PCI_SLOT(pxb->devfn);
}
static int pxb_dev_initfn(PCIDevice *dev)
{
PXBDev *pxb = PXB_DEV(dev);
DeviceState *ds, *bds;
PCIBus *bus;
const char *dev_name = NULL;
if (pxb->numa_node != NUMA_NODE_UNASSIGNED &&
pxb->numa_node >= nb_numa_nodes) {
error_report("Illegal numa node %d.", pxb->numa_node);
return -EINVAL;
}
if (dev->qdev.id && *dev->qdev.id) {
dev_name = dev->qdev.id;
}
ds = qdev_create(NULL, TYPE_PXB_HOST);
bus = pci_bus_new(ds, "pxb-internal", NULL, NULL, 0, TYPE_PXB_BUS);
bus->parent_dev = dev;
bus->address_space_mem = dev->bus->address_space_mem;
bus->address_space_io = dev->bus->address_space_io;
bus->map_irq = pxb_map_irq_fn;
bds = qdev_create(BUS(bus), "pci-bridge");
bds->id = dev_name;
qdev_prop_set_uint8(bds, "chassis_nr", pxb->bus_nr);
PCI_HOST_BRIDGE(ds)->bus = bus;
if (pxb_register_bus(dev, bus)) {
return -EINVAL;
}
qdev_init_nofail(ds);
qdev_init_nofail(bds);
pci_word_test_and_set_mask(dev->config + PCI_STATUS,
PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK);
pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_HOST);
return 0;
}
static Property pxb_dev_properties[] = {
/* Note: 0 is not a legal a PXB bus number. */
DEFINE_PROP_UINT8("bus_nr", PXBDev, bus_nr, 0),
DEFINE_PROP_UINT16("numa_node", PXBDev, numa_node, NUMA_NODE_UNASSIGNED),
DEFINE_PROP_END_OF_LIST(),
};
static void pxb_dev_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = pxb_dev_initfn;
k->vendor_id = PCI_VENDOR_ID_REDHAT;
k->device_id = PCI_DEVICE_ID_REDHAT_PXB;
k->class_id = PCI_CLASS_BRIDGE_HOST;
dc->desc = "PCI Expander Bridge";
dc->props = pxb_dev_properties;
}
static const TypeInfo pxb_dev_info = {
.name = TYPE_PXB_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PXBDev),
.class_init = pxb_dev_class_init,
};
static void pxb_register_types(void)
{
type_register_static(&pxb_bus_info);
type_register_static(&pxb_host_info);
type_register_static(&pxb_dev_info);
}
type_init(pxb_register_types)
|
