target-i386: Add API to get note's size
[qemu/ar7.git] / hw / pci-hotplug.c
blobc55d8b9396cd1fd189c200d013394b3462897662
1 /*
2 * QEMU PCI hotplug support
4 * Copyright (c) 2004 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
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"
37 #if defined(TARGET_I386)
38 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
39 const char *devaddr,
40 const char *opts_str)
42 QemuOpts *opts;
43 PCIBus *bus;
44 int ret, devfn;
46 bus = pci_get_bus_devfn(&devfn, devaddr);
47 if (!bus) {
48 monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
49 return NULL;
51 if (!((BusState*)bus)->allow_hotplug) {
52 monitor_printf(mon, "PCI bus doesn't support hotplug\n");
53 return NULL;
56 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
57 if (!opts) {
58 return NULL;
61 qemu_opt_set(opts, "type", "nic");
63 ret = net_client_init(mon, opts, 0);
64 if (ret < 0)
65 return NULL;
66 if (nd_table[ret].devaddr) {
67 monitor_printf(mon, "Parameter addr not supported\n");
68 return NULL;
70 return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
73 static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
74 DriveInfo *dinfo, int printinfo)
76 SCSIBus *scsibus;
77 SCSIDevice *scsidev;
79 scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
80 if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
81 error_report("Device is not a SCSI adapter");
82 return -1;
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.
90 * Ditch the calculated value and reload from option string (if
91 * specified).
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;
100 dinfo->unit = scsidev->id;
102 if (printinfo)
103 monitor_printf(mon, "OK bus %d, unit %d\n",
104 scsibus->busnr, scsidev->id);
105 return 0;
108 int pci_drive_hot_add(Monitor *mon, const QDict *qdict,
109 DriveInfo *dinfo, int type)
111 int dom, pci_bus;
112 unsigned slot;
113 PCIDevice *dev;
114 const char *pci_addr = qdict_get_str(qdict, "pci_addr");
116 switch (type) {
117 case IF_SCSI:
118 if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
119 goto err;
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;
127 if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
128 goto err;
130 break;
131 default:
132 monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
133 goto err;
136 return 0;
137 err:
138 return -1;
141 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
142 const char *devaddr,
143 const char *opts)
145 PCIDevice *dev;
146 DriveInfo *dinfo = NULL;
147 int type = -1;
148 char buf[128];
149 PCIBus *bus;
150 int devfn;
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;
161 } else {
162 monitor_printf(mon, "no if= specified\n");
163 return NULL;
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;
174 } else {
175 dinfo = NULL;
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;
183 if (!((BusState*)bus)->allow_hotplug) {
184 monitor_printf(mon, "PCI bus doesn't support hotplug\n");
185 return NULL;
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;
199 break;
200 case IF_VIRTIO:
201 if (!dinfo) {
202 monitor_printf(mon, "virtio requires a backing file/device.\n");
203 return NULL;
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;
211 if (qdev_init(&dev->qdev) < 0)
212 dev = NULL;
213 break;
214 default:
215 dev = NULL;
217 return dev;
220 void pci_device_hot_add(Monitor *mon, const QDict *qdict)
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");
227 /* strip legacy tag */
228 if (!strncmp(pci_addr, "pci_addr=", 9)) {
229 pci_addr += 9;
232 if (!opts) {
233 opts = "";
236 if (!strcmp(pci_addr, "auto"))
237 pci_addr = NULL;
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);
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);
255 #endif
257 static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
259 PCIDevice *d;
260 int dom, bus;
261 unsigned slot;
262 Error *local_err = NULL;
264 if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
265 return -1;
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;
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;
281 return 0;
284 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
286 pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));