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 #include "blockdev.h"
  35
  36 #if defined(TARGET_I386)
  37 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
  38                                        const char *devaddr,
  39                                        const char *opts_str)
  40 {
  41     QemuOpts *opts;
  42     PCIBus *bus;
  43     int ret, devfn;
  44
  45     bus = pci_get_bus_devfn(&devfn, devaddr);
  46     if (!bus) {
  47         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
  48         return NULL;
  49     }
  50     if (!((BusState*)bus)->allow_hotplug) {
  51         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
  52         return NULL;
  53     }
  54
  55     opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
  56     if (!opts) {
  57         return NULL;
  58     }
  59
  60     qemu_opt_set(opts, "type", "nic");
  61
  62     ret = net_client_init(mon, opts, 0);
  63     if (ret < 0)
  64         return NULL;
  65     if (nd_table[ret].devaddr) {
  66         monitor_printf(mon, "Parameter addr not supported\n");
  67         return NULL;
  68     }
  69     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  70 }
  71
  72 static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
  73                         DriveInfo *dinfo, int printinfo)
  74 {
  75     SCSIBus *scsibus;
  76     SCSIDevice *scsidev;
  77
  78     scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
  79     if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
  80         error_report("Device is not a SCSI adapter");
  81         return -1;
  82     }
  83
  84     /*
  85      * drive_init() tries to find a default for dinfo->unit.  Doesn't
  86      * work at all for hotplug though as we assign the device to a
  87      * specific bus instead of the first bus with spare scsi ids.
  88      *
  89      * Ditch the calculated value and reload from option string (if
  90      * specified).
  91      */
  92     dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
  93     scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit);
  94     if (!scsidev) {
  95         return -1;
  96     }
  97     dinfo->unit = scsidev->id;
  98
  99     if (printinfo)
 100         monitor_printf(mon, "OK bus %d, unit %d\n",
 101                        scsibus->busnr, scsidev->id);
 102     return 0;
 103 }
 104
 105 void drive_hot_add(Monitor *mon, const QDict *qdict)
 106 {
 107     int dom, pci_bus;
 108     unsigned slot;
 109     int type;
 110     PCIDevice *dev;
 111     DriveInfo *dinfo = NULL;
 112     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 113     const char *opts = qdict_get_str(qdict, "opts");
 114
 115     dinfo = add_init_drive(opts);
 116     if (!dinfo)
 117         goto err;
 118     if (dinfo->devaddr) {
 119         monitor_printf(mon, "Parameter addr not supported\n");
 120         goto err;
 121     }
 122     type = dinfo->type;
 123
 124     switch (type) {
 125     case IF_SCSI:
 126         if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
 127             goto err;
 128         }
 129         dev = pci_find_device(pci_find_root_bus(dom), pci_bus, slot, 0);
 130         if (!dev) {
 131             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
 132             goto err;
 133         }
 134         if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
 135             goto err;
 136         }
 137         break;
 138     case IF_NONE:
 139         monitor_printf(mon, "OK\n");
 140         break;
 141     default:
 142         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
 143         goto err;
 144     }
 145     return;
 146
 147 err:
 148     if (dinfo)
 149         drive_uninit(dinfo);
 150     return;
 151 }
 152
 153 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 154                                            const char *devaddr,
 155                                            const char *opts)
 156 {
 157     PCIDevice *dev;
 158     DriveInfo *dinfo = NULL;
 159     int type = -1;
 160     char buf[128];
 161     PCIBus *bus;
 162     int devfn;
 163
 164     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 165         if (!strcmp(buf, "scsi"))
 166             type = IF_SCSI;
 167         else if (!strcmp(buf, "virtio")) {
 168             type = IF_VIRTIO;
 169         } else {
 170             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 171             return NULL;
 172         }
 173     } else {
 174         monitor_printf(mon, "no if= specified\n");
 175         return NULL;
 176     }
 177
 178     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 179         dinfo = add_init_drive(opts);
 180         if (!dinfo)
 181             return NULL;
 182         if (dinfo->devaddr) {
 183             monitor_printf(mon, "Parameter addr not supported\n");
 184             return NULL;
 185         }
 186     } else {
 187         dinfo = NULL;
 188     }
 189
 190     bus = pci_get_bus_devfn(&devfn, devaddr);
 191     if (!bus) {
 192         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 193         return NULL;
 194     }
 195     if (!((BusState*)bus)->allow_hotplug) {
 196         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
 197         return NULL;
 198     }
 199
 200     switch (type) {
 201     case IF_SCSI:
 202         dev = pci_create(bus, devfn, "lsi53c895a");
 203         if (qdev_init(&dev->qdev) < 0)
 204             dev = NULL;
 205         if (dev && dinfo) {
 206             if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
 207                 qdev_unplug(&dev->qdev);
 208                 dev = NULL;
 209             }
 210         }
 211         break;
 212     case IF_VIRTIO:
 213         if (!dinfo) {
 214             monitor_printf(mon, "virtio requires a backing file/device.\n");
 215             return NULL;
 216         }
 217         dev = pci_create(bus, devfn, "virtio-blk-pci");
 218         if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
 219             qdev_free(&dev->qdev);
 220             dev = NULL;
 221             break;
 222         }
 223         if (qdev_init(&dev->qdev) < 0)
 224             dev = NULL;
 225         break;
 226     default:
 227         dev = NULL;
 228     }
 229     return dev;
 230 }
 231
 232 void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 233 {
 234     PCIDevice *dev = NULL;
 235     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 236     const char *type = qdict_get_str(qdict, "type");
 237     const char *opts = qdict_get_try_str(qdict, "opts");
 238
 239     /* strip legacy tag */
 240     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 241         pci_addr += 9;
 242     }
 243
 244     if (!opts) {
 245         opts = "";
 246     }
 247
 248     if (!strcmp(pci_addr, "auto"))
 249         pci_addr = NULL;
 250
 251     if (strcmp(type, "nic") == 0) {
 252         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 253     } else if (strcmp(type, "storage") == 0) {
 254         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 255     } else {
 256         monitor_printf(mon, "invalid type: %s\n", type);
 257     }
 258
 259     if (dev) {
 260         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 261                        pci_find_domain(dev->bus),
 262                        pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 263                        PCI_FUNC(dev->devfn));
 264     } else
 265         monitor_printf(mon, "failed to add %s\n", opts);
 266 }
 267 #endif
 268
 269 static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 270 {
 271     PCIDevice *d;
 272     int dom, bus;
 273     unsigned slot;
 274
 275     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 276         return -1;
 277     }
 278
 279     d = pci_find_device(pci_find_root_bus(dom), bus, slot, 0);
 280     if (!d) {
 281         monitor_printf(mon, "slot %d empty\n", slot);
 282         return -1;
 283     }
 284     return qdev_unplug(&d->qdev);
 285 }
 286
 287 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
 288 {
 289     pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 290 }