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 "pc.h"
  30 #include "monitor.h"
  31 #include "scsi.h"
  32 #include "virtio-blk.h"
  33 #include "qemu-config.h"
  34
  35 #if defined(TARGET_I386)
  36 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
  37                                        const char *devaddr,
  38                                        const char *opts_str)
  39 {
  40     QemuOpts *opts;
  41     PCIBus *bus;
  42     int ret, devfn;
  43
  44     bus = pci_get_bus_devfn(&devfn, devaddr);
  45     if (!bus) {
  46         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
  47         return NULL;
  48     }
  49     if (!((BusState*)bus)->allow_hotplug) {
  50         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
  51         return NULL;
  52     }
  53
  54     opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", 0);
  55     if (!opts) {
  56         return NULL;
  57     }
  58
  59     qemu_opt_set(opts, "type", "nic");
  60
  61     ret = net_client_init(mon, opts, 0);
  62     if (ret < 0)
  63         return NULL;
  64     if (nd_table[ret].devaddr) {
  65         monitor_printf(mon, "Parameter addr not supported\n");
  66         return NULL;
  67     }
  68     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  69 }
  70
  71 static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
  72                         DriveInfo *dinfo, int printinfo)
  73 {
  74     SCSIBus *scsibus;
  75     SCSIDevice *scsidev;
  76
  77     scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
  78     if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
  79         error_report("Device is not a SCSI adapter");
  80         return -1;
  81     }
  82
  83     /*
  84      * drive_init() tries to find a default for dinfo->unit.  Doesn't
  85      * work at all for hotplug though as we assign the device to a
  86      * specific bus instead of the first bus with spare scsi ids.
  87      *
  88      * Ditch the calculated value and reload from option string (if
  89      * specified).
  90      */
  91     dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
  92     scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit);
  93     if (!scsidev) {
  94         return -1;
  95     }
  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(dom), 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         if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
 218             qdev_free(&dev->qdev);
 219             dev = NULL;
 220             break;
 221         }
 222         if (qdev_init(&dev->qdev) < 0)
 223             dev = NULL;
 224         break;
 225     default:
 226         dev = NULL;
 227     }
 228     return dev;
 229 }
 230
 231 void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 232 {
 233     PCIDevice *dev = NULL;
 234     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 235     const char *type = qdict_get_str(qdict, "type");
 236     const char *opts = qdict_get_try_str(qdict, "opts");
 237
 238     /* strip legacy tag */
 239     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 240         pci_addr += 9;
 241     }
 242
 243     if (!opts) {
 244         opts = "";
 245     }
 246
 247     if (!strcmp(pci_addr, "auto"))
 248         pci_addr = NULL;
 249
 250     if (strcmp(type, "nic") == 0) {
 251         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 252     } else if (strcmp(type, "storage") == 0) {
 253         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 254     } else {
 255         monitor_printf(mon, "invalid type: %s\n", type);
 256     }
 257
 258     if (dev) {
 259         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 260                        pci_find_domain(dev->bus),
 261                        pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 262                        PCI_FUNC(dev->devfn));
 263     } else
 264         monitor_printf(mon, "failed to add %s\n", opts);
 265 }
 266 #endif
 267
 268 int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 269 {
 270     PCIDevice *d;
 271     int dom, bus;
 272     unsigned slot;
 273
 274     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 275         return -1;
 276     }
 277
 278     d = pci_find_device(pci_find_root_bus(dom), bus, slot, 0);
 279     if (!d) {
 280         monitor_printf(mon, "slot %d empty\n", slot);
 281         return -1;
 282     }
 283     return qdev_unplug(&d->qdev);
 284 }
 285
 286 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
 287 {
 288     pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 289 }