Statistics
| Branch: | Revision:

root / hw / pci-hotplug.c @ 72cf2d4f

History | View | Annotate | Download (6.8 kB)

1
/*
2
 * QEMU PCI hotplug support
3
 *
4
 * Copyright (c) 2004 Fabrice Bellard
5
 *
6
 * Permission is hereby granted, free of charge, to any person obtaining a copy
7
 * of this software and associated documentation files (the "Software"), to deal
8
 * in the Software without restriction, including without limitation the rights
9
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10
 * copies of the Software, and to permit persons to whom the Software is
11
 * furnished to do so, subject to the following conditions:
12
 *
13
 * The above copyright notice and this permission notice shall be included in
14
 * all copies or substantial portions of the Software.
15
 *
16
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22
 * THE SOFTWARE.
23
 */
24

    
25
#include "hw.h"
26
#include "boards.h"
27
#include "pci.h"
28
#include "net.h"
29
#include "sysemu.h"
30
#include "pc.h"
31
#include "monitor.h"
32
#include "block_int.h"
33
#include "scsi-disk.h"
34
#include "virtio-blk.h"
35

    
36
#if defined(TARGET_I386) || defined(TARGET_X86_64)
37
static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
38
                                       const char *devaddr, const char *opts)
39
{
40
    int ret;
41

    
42
    ret = net_client_init(mon, "nic", opts);
43
    if (ret < 0)
44
        return NULL;
45
    if (nd_table[ret].devaddr) {
46
        monitor_printf(mon, "Parameter addr not supported\n");
47
        return NULL;
48
    }
49
    return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
50
}
51

    
52
void drive_hot_add(Monitor *mon, const QDict *qdict)
53
{
54
    int dom, pci_bus;
55
    unsigned slot;
56
    int type, bus;
57
    int success = 0;
58
    PCIDevice *dev;
59
    DriveInfo *dinfo;
60
    const char *pci_addr = qdict_get_str(qdict, "pci_addr");
61
    const char *opts = qdict_get_str(qdict, "opts");
62
    BusState *scsibus;
63

    
64
    if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
65
        return;
66
    }
67

    
68
    dev = pci_find_device(pci_bus, slot, 0);
69
    if (!dev) {
70
        monitor_printf(mon, "no pci device with address %s\n", pci_addr);
71
        return;
72
    }
73

    
74
    dinfo = add_init_drive(opts);
75
    if (!dinfo)
76
        return;
77
    if (dinfo->devaddr) {
78
        monitor_printf(mon, "Parameter addr not supported\n");
79
        return;
80
    }
81
    type = dinfo->type;
82
    bus = drive_get_max_bus (type);
83

    
84
    switch (type) {
85
    case IF_SCSI:
86
        success = 1;
87
        scsibus = QLIST_FIRST(&dev->qdev.child_bus);
88
        scsi_bus_legacy_add_drive(DO_UPCAST(SCSIBus, qbus, scsibus),
89
                                  dinfo, dinfo->unit);
90
        break;
91
    default:
92
        monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
93
    }
94

    
95
    if (success)
96
        monitor_printf(mon, "OK bus %d, unit %d\n",
97
                       dinfo->bus,
98
                       dinfo->unit);
99
    return;
100
}
101

    
102
static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
103
                                           const char *devaddr,
104
                                           const char *opts)
105
{
106
    PCIDevice *dev;
107
    DriveInfo *dinfo = NULL;
108
    int type = -1;
109
    char buf[128];
110

    
111
    if (get_param_value(buf, sizeof(buf), "if", opts)) {
112
        if (!strcmp(buf, "scsi"))
113
            type = IF_SCSI;
114
        else if (!strcmp(buf, "virtio")) {
115
            type = IF_VIRTIO;
116
        } else {
117
            monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
118
            return NULL;
119
        }
120
    } else {
121
        monitor_printf(mon, "no if= specified\n");
122
        return NULL;
123
    }
124

    
125
    if (get_param_value(buf, sizeof(buf), "file", opts)) {
126
        dinfo = add_init_drive(opts);
127
        if (!dinfo)
128
            return NULL;
129
        if (dinfo->devaddr) {
130
            monitor_printf(mon, "Parameter addr not supported\n");
131
            return NULL;
132
        }
133
    } else {
134
        dinfo = NULL;
135
    }
136

    
137
    switch (type) {
138
    case IF_SCSI:
139
        dev = pci_create("lsi53c895a", devaddr);
140
        break;
141
    case IF_VIRTIO:
142
        if (!dinfo) {
143
            monitor_printf(mon, "virtio requires a backing file/device.\n");
144
            return NULL;
145
        }
146
        dev = pci_create("virtio-blk-pci", devaddr);
147
        qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
148
        break;
149
    default:
150
        dev = NULL;
151
    }
152
    if (dev)
153
        qdev_init(&dev->qdev);
154
    return dev;
155
}
156

    
157
void pci_device_hot_add(Monitor *mon, const QDict *qdict)
158
{
159
    PCIDevice *dev = NULL;
160
    const char *pci_addr = qdict_get_str(qdict, "pci_addr");
161
    const char *type = qdict_get_str(qdict, "type");
162
    const char *opts = qdict_get_try_str(qdict, "opts");
163

    
164
    /* strip legacy tag */
165
    if (!strncmp(pci_addr, "pci_addr=", 9)) {
166
        pci_addr += 9;
167
    }
168

    
169
    if (!opts) {
170
        opts = "";
171
    }
172

    
173
    if (!strcmp(pci_addr, "auto"))
174
        pci_addr = NULL;
175

    
176
    if (strcmp(type, "nic") == 0)
177
        dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
178
    else if (strcmp(type, "storage") == 0)
179
        dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
180
    else
181
        monitor_printf(mon, "invalid type: %s\n", type);
182

    
183
    if (dev) {
184
        qemu_system_device_hot_add(pci_bus_num(dev->bus),
185
                                   PCI_SLOT(dev->devfn), 1);
186
        monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
187
                       0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
188
                       PCI_FUNC(dev->devfn));
189
    } else
190
        monitor_printf(mon, "failed to add %s\n", opts);
191
}
192
#endif
193

    
194
void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
195
{
196
    PCIDevice *d;
197
    int dom, bus;
198
    unsigned slot;
199

    
200
    if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
201
        return;
202
    }
203

    
204
    d = pci_find_device(bus, slot, 0);
205
    if (!d) {
206
        monitor_printf(mon, "slot %d empty\n", slot);
207
        return;
208
    }
209

    
210
    qemu_system_device_hot_add(bus, slot, 0);
211
}
212

    
213
void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
214
{
215
    pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
216
}
217

    
218
static int pci_match_fn(void *dev_private, void *arg)
219
{
220
    PCIDevice *dev = dev_private;
221
    PCIDevice *match = arg;
222

    
223
    return (dev == match);
224
}
225

    
226
/*
227
 * OS has executed _EJ0 method, we now can remove the device
228
 */
229
void pci_device_hot_remove_success(int pcibus, int slot)
230
{
231
    PCIDevice *d = pci_find_device(pcibus, slot, 0);
232
    int class_code;
233

    
234
    if (!d) {
235
        monitor_printf(cur_mon, "invalid slot %d\n", slot);
236
        return;
237
    }
238

    
239
    class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
240

    
241
    switch(class_code) {
242
    case PCI_BASE_CLASS_STORAGE:
243
        destroy_bdrvs(pci_match_fn, d);
244
        break;
245
    case PCI_BASE_CLASS_NETWORK:
246
        destroy_nic(pci_match_fn, d);
247
        break;
248
    }
249

    
250
    pci_unregister_device(d);
251
}
252