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         monitor_printf(mon, "parsing network options '%s' failed\n",
  60                        opts_str ? opts_str : "");
  61         return NULL;
  62     }
  63
  64     qemu_opt_set(opts, "type", "nic");
  65
  66     ret = net_client_init(mon, opts, 0);
  67     if (ret < 0)
  68         return NULL;
  69     if (nd_table[ret].devaddr) {
  70         monitor_printf(mon, "Parameter addr not supported\n");
  71         return NULL;
  72     }
  73     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  74 }
  75
  76 static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
  77                         DriveInfo *dinfo, int printinfo)
  78 {
  79     SCSIBus *scsibus;
  80     SCSIDevice *scsidev;
  81
  82     scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
  83     if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
  84         error_report("Device is not a SCSI adapter");
  85         return -1;
  86     }
  87
  88     /*
  89      * drive_init() tries to find a default for dinfo->unit.  Doesn't
  90      * work at all for hotplug though as we assign the device to a
  91      * specific bus instead of the first bus with spare scsi ids.
  92      *
  93      * Ditch the calculated value and reload from option string (if
  94      * specified).
  95      */
  96     dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
  97     scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo, dinfo->unit);
  98     dinfo->unit = scsidev->id;
  99
 100     if (printinfo)
 101         monitor_printf(mon, "OK bus %d, unit %d\n",
 102                        scsibus->busnr, scsidev->id);
 103     return 0;
 104 }
 105
 106 void drive_hot_add(Monitor *mon, const QDict *qdict)
 107 {
 108     int dom, pci_bus;
 109     unsigned slot;
 110     int type, bus;
 111     PCIDevice *dev;
 112     DriveInfo *dinfo = NULL;
 113     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 114     const char *opts = qdict_get_str(qdict, "opts");
 115
 116     dinfo = add_init_drive(opts);
 117     if (!dinfo)
 118         goto err;
 119     if (dinfo->devaddr) {
 120         monitor_printf(mon, "Parameter addr not supported\n");
 121         goto err;
 122     }
 123     type = dinfo->type;
 124     bus = drive_get_max_bus (type);
 125
 126     switch (type) {
 127     case IF_SCSI:
 128         if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
 129             goto err;
 130         }
 131         dev = pci_find_device(pci_find_root_bus(0), pci_bus, slot, 0);
 132         if (!dev) {
 133             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
 134             goto err;
 135         }
 136         if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
 137             goto err;
 138         }
 139         break;
 140     case IF_NONE:
 141         monitor_printf(mon, "OK\n");
 142         break;
 143     default:
 144         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
 145         goto err;
 146     }
 147     return;
 148
 149 err:
 150     if (dinfo)
 151         drive_uninit(dinfo);
 152     return;
 153 }
 154
 155 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 156                                            const char *devaddr,
 157                                            const char *opts)
 158 {
 159     PCIDevice *dev;
 160     DriveInfo *dinfo = NULL;
 161     int type = -1;
 162     char buf[128];
 163     PCIBus *bus;
 164     int devfn;
 165
 166     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 167         if (!strcmp(buf, "scsi"))
 168             type = IF_SCSI;
 169         else if (!strcmp(buf, "virtio")) {
 170             type = IF_VIRTIO;
 171         } else {
 172             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 173             return NULL;
 174         }
 175     } else {
 176         monitor_printf(mon, "no if= specified\n");
 177         return NULL;
 178     }
 179
 180     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 181         dinfo = add_init_drive(opts);
 182         if (!dinfo)
 183             return NULL;
 184         if (dinfo->devaddr) {
 185             monitor_printf(mon, "Parameter addr not supported\n");
 186             return NULL;
 187         }
 188     } else {
 189         dinfo = NULL;
 190     }
 191
 192     bus = pci_get_bus_devfn(&devfn, devaddr);
 193     if (!bus) {
 194         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 195         return NULL;
 196     }
 197     if (!((BusState*)bus)->allow_hotplug) {
 198         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
 199         return NULL;
 200     }
 201
 202     switch (type) {
 203     case IF_SCSI:
 204         dev = pci_create(bus, devfn, "lsi53c895a");
 205         if (qdev_init(&dev->qdev) < 0)
 206             dev = NULL;
 207         if (dev && dinfo) {
 208             if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
 209                 qdev_unplug(&dev->qdev);
 210                 dev = NULL;
 211             }
 212         }
 213         break;
 214     case IF_VIRTIO:
 215         if (!dinfo) {
 216             monitor_printf(mon, "virtio requires a backing file/device.\n");
 217             return NULL;
 218         }
 219         dev = pci_create(bus, devfn, "virtio-blk-pci");
 220         qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
 221         if (qdev_init(&dev->qdev) < 0)
 222             dev = NULL;
 223         break;
 224     default:
 225         dev = NULL;
 226     }
 227     return dev;
 228 }
 229
 230 void pci_device_hot_add_print(Monitor *mon, const QObject *data)
 231 {
 232     QDict *qdict;
 233
 234     assert(qobject_type(data) == QTYPE_QDICT);
 235     qdict = qobject_to_qdict(data);
 236
 237     monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 238                    (int) qdict_get_int(qdict, "domain"),
 239                    (int) qdict_get_int(qdict, "bus"),
 240                    (int) qdict_get_int(qdict, "slot"),
 241                    (int) qdict_get_int(qdict, "function"));
 242
 243 }
 244
 245 /**
 246  * pci_device_hot_add(): Hot add a PCI device
 247  *
 248  * Return a QDict with the following device information:
 249  *
 250  * - "domain": domain number
 251  * - "bus": bus number
 252  * - "slot": slot number
 253  * - "function": function number
 254  *
 255  * Example:
 256  *
 257  * { "domain": 0, "bus": 0, "slot": 5, "function": 0 }
 258  */
 259 int pci_device_hot_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 260 {
 261     PCIDevice *dev = NULL;
 262     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 263     const char *type = qdict_get_str(qdict, "type");
 264     const char *opts = qdict_get_try_str(qdict, "opts");
 265
 266     /* strip legacy tag */
 267     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 268         pci_addr += 9;
 269     }
 270
 271     if (!opts) {
 272         opts = "";
 273     }
 274
 275     if (!strcmp(pci_addr, "auto"))
 276         pci_addr = NULL;
 277
 278     if (strcmp(type, "nic") == 0) {
 279         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 280     } else if (strcmp(type, "storage") == 0) {
 281         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 282     } else {
 283         monitor_printf(mon, "invalid type: %s\n", type);
 284         return -1;
 285     }
 286
 287     if (dev) {
 288         *ret_data =
 289         qobject_from_jsonf("{ 'domain': 0, 'bus': %d, 'slot': %d, "
 290                            "'function': %d }", pci_bus_num(dev->bus),
 291                            PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 292     } else {
 293         monitor_printf(mon, "failed to add %s\n", opts);
 294         return -1;
 295     }
 296
 297     return 0;
 298 }
 299 #endif
 300
 301 int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 302 {
 303     PCIDevice *d;
 304     int dom, bus;
 305     unsigned slot;
 306
 307     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 308         return -1;
 309     }
 310
 311     d = pci_find_device(pci_find_root_bus(0), bus, slot, 0);
 312     if (!d) {
 313         monitor_printf(mon, "slot %d empty\n", slot);
 314         return -1;
 315     }
 316     return qdev_unplug(&d->qdev);
 317 }
 318
 319 int do_pci_device_hot_remove(Monitor *mon, const QDict *qdict,
 320                              QObject **ret_data)
 321 {
 322     return pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 323 }