hw/pci-hotplug.c

   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.h"
  34 #include "virtio-blk.h"
  35 #include "qemu-config.h"
  36 #include "qemu-objects.h"
  37
  38 #if defined(TARGET_I386)
  39 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
  40                                        const char *devaddr,
  41                                        const char *opts_str)
  42 {
  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_net_opts, 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(mon, opts, 0);
  65     if (ret < 0)
  66         return NULL;
  67     if (nd_table[ret].devaddr) {
  68         monitor_printf(mon, "Parameter addr not supported\n");
  69         return NULL;
  70     }
  71     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  72 }
  73
  74 static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
  75                         DriveInfo *dinfo, int printinfo)
  76 {
  77     SCSIBus *scsibus;
  78     SCSIDevice *scsidev;
  79
  80     scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
  81     if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
  82         error_report("Device is not a SCSI adapter");
  83         return -1;
  84     }
  85
  86     /*
  87      * drive_init() tries to find a default for dinfo->unit.  Doesn't
  88      * work at all for hotplug though as we assign the device to a
  89      * specific bus instead of the first bus with spare scsi ids.
  90      *
  91      * Ditch the calculated value and reload from option string (if
  92      * specified).
  93      */
  94     dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
  95     scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo, dinfo->unit);
  96     dinfo->unit = scsidev->id;
  97
  98     if (printinfo)
  99         monitor_printf(mon, "OK bus %d, unit %d\n",
 100                        scsibus->busnr, scsidev->id);
 101     return 0;
 102 }
 103
 104 void drive_hot_add(Monitor *mon, const QDict *qdict)
 105 {
 106     int dom, pci_bus;
 107     unsigned slot;
 108     int type;
 109     PCIDevice *dev;
 110     DriveInfo *dinfo = NULL;
 111     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 112     const char *opts = qdict_get_str(qdict, "opts");
 113
 114     dinfo = add_init_drive(opts);
 115     if (!dinfo)
 116         goto err;
 117     if (dinfo->devaddr) {
 118         monitor_printf(mon, "Parameter addr not supported\n");
 119         goto err;
 120     }
 121     type = dinfo->type;
 122
 123     switch (type) {
 124     case IF_SCSI:
 125         if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
 126             goto err;
 127         }
 128         dev = pci_find_device(pci_find_root_bus(0), pci_bus, slot, 0);
 129         if (!dev) {
 130             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
 131             goto err;
 132         }
 133         if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
 134             goto err;
 135         }
 136         break;
 137     case IF_NONE:
 138         monitor_printf(mon, "OK\n");
 139         break;
 140     default:
 141         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
 142         goto err;
 143     }
 144     return;
 145
 146 err:
 147     if (dinfo)
 148         drive_uninit(dinfo);
 149     return;
 150 }
 151
 152 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 153                                            const char *devaddr,
 154                                            const char *opts)
 155 {
 156     PCIDevice *dev;
 157     DriveInfo *dinfo = NULL;
 158     int type = -1;
 159     char buf[128];
 160     PCIBus *bus;
 161     int devfn;
 162
 163     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 164         if (!strcmp(buf, "scsi"))
 165             type = IF_SCSI;
 166         else if (!strcmp(buf, "virtio")) {
 167             type = IF_VIRTIO;
 168         } else {
 169             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 170             return NULL;
 171         }
 172     } else {
 173         monitor_printf(mon, "no if= specified\n");
 174         return NULL;
 175     }
 176
 177     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 178         dinfo = add_init_drive(opts);
 179         if (!dinfo)
 180             return NULL;
 181         if (dinfo->devaddr) {
 182             monitor_printf(mon, "Parameter addr not supported\n");
 183             return NULL;
 184         }
 185     } else {
 186         dinfo = NULL;
 187     }
 188
 189     bus = pci_get_bus_devfn(&devfn, devaddr);
 190     if (!bus) {
 191         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 192         return NULL;
 193     }
 194     if (!((BusState*)bus)->allow_hotplug) {
 195         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
 196         return NULL;
 197     }
 198
 199     switch (type) {
 200     case IF_SCSI:
 201         dev = pci_create(bus, devfn, "lsi53c895a");
 202         if (qdev_init(&dev->qdev) < 0)
 203             dev = NULL;
 204         if (dev && dinfo) {
 205             if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
 206                 qdev_unplug(&dev->qdev);
 207                 dev = NULL;
 208             }
 209         }
 210         break;
 211     case IF_VIRTIO:
 212         if (!dinfo) {
 213             monitor_printf(mon, "virtio requires a backing file/device.\n");
 214             return NULL;
 215         }
 216         dev = pci_create(bus, devfn, "virtio-blk-pci");
 217         qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
 218         if (qdev_init(&dev->qdev) < 0)
 219             dev = NULL;
 220         break;
 221     default:
 222         dev = NULL;
 223     }
 224     return dev;
 225 }
 226
 227 void pci_device_hot_add_print(Monitor *mon, const QObject *data)
 228 {
 229     QDict *qdict;
 230
 231     assert(qobject_type(data) == QTYPE_QDICT);
 232     qdict = qobject_to_qdict(data);
 233
 234     monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 235                    (int) qdict_get_int(qdict, "domain"),
 236                    (int) qdict_get_int(qdict, "bus"),
 237                    (int) qdict_get_int(qdict, "slot"),
 238                    (int) qdict_get_int(qdict, "function"));
 239
 240 }
 241
 242 /**
 243  * pci_device_hot_add(): Hot add a PCI device
 244  *
 245  * Return a QDict with the following device information:
 246  *
 247  * - "domain": domain number
 248  * - "bus": bus number
 249  * - "slot": slot number
 250  * - "function": function number
 251  *
 252  * Example:
 253  *
 254  * { "domain": 0, "bus": 0, "slot": 5, "function": 0 }
 255  */
 256 int pci_device_hot_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 257 {
 258     PCIDevice *dev = NULL;
 259     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 260     const char *type = qdict_get_str(qdict, "type");
 261     const char *opts = qdict_get_try_str(qdict, "opts");
 262
 263     /* strip legacy tag */
 264     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 265         pci_addr += 9;
 266     }
 267
 268     if (!opts) {
 269         opts = "";
 270     }
 271
 272     if (!strcmp(pci_addr, "auto"))
 273         pci_addr = NULL;
 274
 275     if (strcmp(type, "nic") == 0) {
 276         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 277     } else if (strcmp(type, "storage") == 0) {
 278         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 279     } else {
 280         monitor_printf(mon, "invalid type: %s\n", type);
 281         return -1;
 282     }
 283
 284     if (dev) {
 285         *ret_data =
 286         qobject_from_jsonf("{ 'domain': 0, 'bus': %d, 'slot': %d, "
 287                            "'function': %d }", pci_bus_num(dev->bus),
 288                            PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 289     } else {
 290         monitor_printf(mon, "failed to add %s\n", opts);
 291         return -1;
 292     }
 293
 294     return 0;
 295 }
 296 #endif
 297
 298 int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 299 {
 300     PCIDevice *d;
 301     int dom, bus;
 302     unsigned slot;
 303
 304     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 305         return -1;
 306     }
 307
 308     d = pci_find_device(pci_find_root_bus(0), bus, slot, 0);
 309     if (!d) {
 310         monitor_printf(mon, "slot %d empty\n", slot);
 311         return -1;
 312     }
 313     return qdev_unplug(&d->qdev);
 314 }
 315
 316 int do_pci_device_hot_remove(Monitor *mon, const QDict *qdict,
 317                              QObject **ret_data)
 318 {
 319     return pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 320 }