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