root / hw / pci-hotplug.c @ 71193433
History | View | Annotate | Download (8.2 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 "pc.h" |
30 |
#include "monitor.h" |
31 |
#include "scsi.h" |
32 |
#include "virtio-blk.h" |
33 |
#include "qemu-config.h" |
34 |
#include "blockdev.h" |
35 |
#include "error.h" |
36 |
|
37 |
#if defined(TARGET_I386)
|
38 |
static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
|
39 |
const char *devaddr, |
40 |
const char *opts_str) |
41 |
{ |
42 |
Error *local_err = NULL;
|
43 |
QemuOpts *opts; |
44 |
PCIBus *bus; |
45 |
int ret, devfn;
|
46 |
|
47 |
bus = pci_get_bus_devfn(&devfn, devaddr); |
48 |
if (!bus) {
|
49 |
monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
|
50 |
return NULL; |
51 |
} |
52 |
if (!((BusState*)bus)->allow_hotplug) {
|
53 |
monitor_printf(mon, "PCI bus doesn't support hotplug\n");
|
54 |
return NULL; |
55 |
} |
56 |
|
57 |
opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); |
58 |
if (!opts) {
|
59 |
return NULL; |
60 |
} |
61 |
|
62 |
qemu_opt_set(opts, "type", "nic"); |
63 |
|
64 |
ret = net_client_init(opts, 0, &local_err);
|
65 |
if (error_is_set(&local_err)) {
|
66 |
qerror_report_err(local_err); |
67 |
error_free(local_err); |
68 |
return NULL; |
69 |
} |
70 |
if (nd_table[ret].devaddr) {
|
71 |
monitor_printf(mon, "Parameter addr not supported\n");
|
72 |
return NULL; |
73 |
} |
74 |
return pci_nic_init(&nd_table[ret], "rtl8139", devaddr); |
75 |
} |
76 |
|
77 |
static int scsi_hot_add(Monitor *mon, DeviceState *adapter, |
78 |
DriveInfo *dinfo, int printinfo)
|
79 |
{ |
80 |
SCSIBus *scsibus; |
81 |
SCSIDevice *scsidev; |
82 |
|
83 |
scsibus = SCSI_BUS(QLIST_FIRST(&adapter->child_bus)); |
84 |
|
85 |
/*
|
86 |
* drive_init() tries to find a default for dinfo->unit. Doesn't
|
87 |
* work at all for hotplug though as we assign the device to a
|
88 |
* specific bus instead of the first bus with spare scsi ids.
|
89 |
*
|
90 |
* Ditch the calculated value and reload from option string (if
|
91 |
* specified).
|
92 |
*/
|
93 |
dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1); |
94 |
dinfo->bus = scsibus->busnr; |
95 |
scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit, |
96 |
false, -1); |
97 |
if (!scsidev) {
|
98 |
return -1; |
99 |
} |
100 |
dinfo->unit = scsidev->id; |
101 |
|
102 |
if (printinfo)
|
103 |
monitor_printf(mon, "OK bus %d, unit %d\n",
|
104 |
scsibus->busnr, scsidev->id); |
105 |
return 0; |
106 |
} |
107 |
|
108 |
int pci_drive_hot_add(Monitor *mon, const QDict *qdict, |
109 |
DriveInfo *dinfo, int type)
|
110 |
{ |
111 |
int dom, pci_bus;
|
112 |
unsigned slot;
|
113 |
PCIDevice *dev; |
114 |
const char *pci_addr = qdict_get_str(qdict, "pci_addr"); |
115 |
|
116 |
switch (type) {
|
117 |
case IF_SCSI:
|
118 |
if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
|
119 |
goto err;
|
120 |
} |
121 |
dev = pci_find_device(pci_find_root_bus(dom), pci_bus, |
122 |
PCI_DEVFN(slot, 0));
|
123 |
if (!dev) {
|
124 |
monitor_printf(mon, "no pci device with address %s\n", pci_addr);
|
125 |
goto err;
|
126 |
} |
127 |
if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) { |
128 |
goto err;
|
129 |
} |
130 |
break;
|
131 |
default:
|
132 |
monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
|
133 |
goto err;
|
134 |
} |
135 |
|
136 |
return 0; |
137 |
err:
|
138 |
return -1; |
139 |
} |
140 |
|
141 |
static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
|
142 |
const char *devaddr, |
143 |
const char *opts) |
144 |
{ |
145 |
PCIDevice *dev; |
146 |
DriveInfo *dinfo = NULL;
|
147 |
int type = -1; |
148 |
char buf[128]; |
149 |
PCIBus *bus; |
150 |
int devfn;
|
151 |
|
152 |
if (get_param_value(buf, sizeof(buf), "if", opts)) { |
153 |
if (!strcmp(buf, "scsi")) |
154 |
type = IF_SCSI; |
155 |
else if (!strcmp(buf, "virtio")) { |
156 |
type = IF_VIRTIO; |
157 |
} else {
|
158 |
monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
|
159 |
return NULL; |
160 |
} |
161 |
} else {
|
162 |
monitor_printf(mon, "no if= specified\n");
|
163 |
return NULL; |
164 |
} |
165 |
|
166 |
if (get_param_value(buf, sizeof(buf), "file", opts)) { |
167 |
dinfo = add_init_drive(opts); |
168 |
if (!dinfo)
|
169 |
return NULL; |
170 |
if (dinfo->devaddr) {
|
171 |
monitor_printf(mon, "Parameter addr not supported\n");
|
172 |
return NULL; |
173 |
} |
174 |
} else {
|
175 |
dinfo = NULL;
|
176 |
} |
177 |
|
178 |
bus = pci_get_bus_devfn(&devfn, devaddr); |
179 |
if (!bus) {
|
180 |
monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
|
181 |
return NULL; |
182 |
} |
183 |
if (!((BusState*)bus)->allow_hotplug) {
|
184 |
monitor_printf(mon, "PCI bus doesn't support hotplug\n");
|
185 |
return NULL; |
186 |
} |
187 |
|
188 |
switch (type) {
|
189 |
case IF_SCSI:
|
190 |
dev = pci_create(bus, devfn, "lsi53c895a");
|
191 |
if (qdev_init(&dev->qdev) < 0) |
192 |
dev = NULL;
|
193 |
if (dev && dinfo) {
|
194 |
if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) { |
195 |
qdev_unplug(&dev->qdev, NULL);
|
196 |
dev = NULL;
|
197 |
} |
198 |
} |
199 |
break;
|
200 |
case IF_VIRTIO:
|
201 |
if (!dinfo) {
|
202 |
monitor_printf(mon, "virtio requires a backing file/device.\n");
|
203 |
return NULL; |
204 |
} |
205 |
dev = pci_create(bus, devfn, "virtio-blk-pci");
|
206 |
if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) { |
207 |
qdev_free(&dev->qdev); |
208 |
dev = NULL;
|
209 |
break;
|
210 |
} |
211 |
if (qdev_init(&dev->qdev) < 0) |
212 |
dev = NULL;
|
213 |
break;
|
214 |
default:
|
215 |
dev = NULL;
|
216 |
} |
217 |
return dev;
|
218 |
} |
219 |
|
220 |
void pci_device_hot_add(Monitor *mon, const QDict *qdict) |
221 |
{ |
222 |
PCIDevice *dev = NULL;
|
223 |
const char *pci_addr = qdict_get_str(qdict, "pci_addr"); |
224 |
const char *type = qdict_get_str(qdict, "type"); |
225 |
const char *opts = qdict_get_try_str(qdict, "opts"); |
226 |
|
227 |
/* strip legacy tag */
|
228 |
if (!strncmp(pci_addr, "pci_addr=", 9)) { |
229 |
pci_addr += 9;
|
230 |
} |
231 |
|
232 |
if (!opts) {
|
233 |
opts = "";
|
234 |
} |
235 |
|
236 |
if (!strcmp(pci_addr, "auto")) |
237 |
pci_addr = NULL;
|
238 |
|
239 |
if (strcmp(type, "nic") == 0) { |
240 |
dev = qemu_pci_hot_add_nic(mon, pci_addr, opts); |
241 |
} else if (strcmp(type, "storage") == 0) { |
242 |
dev = qemu_pci_hot_add_storage(mon, pci_addr, opts); |
243 |
} else {
|
244 |
monitor_printf(mon, "invalid type: %s\n", type);
|
245 |
} |
246 |
|
247 |
if (dev) {
|
248 |
monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
|
249 |
pci_find_domain(dev->bus), |
250 |
pci_bus_num(dev->bus), PCI_SLOT(dev->devfn), |
251 |
PCI_FUNC(dev->devfn)); |
252 |
} else
|
253 |
monitor_printf(mon, "failed to add %s\n", opts);
|
254 |
} |
255 |
#endif
|
256 |
|
257 |
static int pci_device_hot_remove(Monitor *mon, const char *pci_addr) |
258 |
{ |
259 |
PCIDevice *d; |
260 |
int dom, bus;
|
261 |
unsigned slot;
|
262 |
Error *local_err = NULL;
|
263 |
|
264 |
if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
|
265 |
return -1; |
266 |
} |
267 |
|
268 |
d = pci_find_device(pci_find_root_bus(dom), bus, PCI_DEVFN(slot, 0));
|
269 |
if (!d) {
|
270 |
monitor_printf(mon, "slot %d empty\n", slot);
|
271 |
return -1; |
272 |
} |
273 |
|
274 |
qdev_unplug(&d->qdev, &local_err); |
275 |
if (error_is_set(&local_err)) {
|
276 |
monitor_printf(mon, "%s\n", error_get_pretty(local_err));
|
277 |
error_free(local_err); |
278 |
return -1; |
279 |
} |
280 |
|
281 |
return 0; |
282 |
} |
283 |
|
284 |
void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict) |
285 |
{ |
286 |
pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
|
287 |
} |