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