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 #include "device-assignment.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     int ret;
  45
  46     opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
  47     if (!opts) {
  48         monitor_printf(mon, "parsing network options '%s' failed\n",
  49                        opts_str ? opts_str : "");
  50         return NULL;
  51     }
  52
  53     qemu_opt_set(opts, "type", "nic");
  54
  55     ret = net_client_init(mon, opts, 0);
  56     if (ret < 0)
  57         return NULL;
  58     if (nd_table[ret].devaddr) {
  59         monitor_printf(mon, "Parameter addr not supported\n");
  60         return NULL;
  61     }
  62     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  63 }
  64
  65 static int scsi_hot_add(DeviceState *adapter, DriveInfo *dinfo, int printinfo)
  66 {
  67     SCSIBus *scsibus;
  68     SCSIDevice *scsidev;
  69
  70     scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
  71     if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
  72         qemu_error("Device is not a SCSI adapter\n");
  73         return -1;
  74     }
  75
  76     /*
  77      * drive_init() tries to find a default for dinfo->unit.  Doesn't
  78      * work at all for hotplug though as we assign the device to a
  79      * specific bus instead of the first bus with spare scsi ids.
  80      *
  81      * Ditch the calculated value and reload from option string (if
  82      * specified).
  83      */
  84     dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
  85     scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo, dinfo->unit);
  86
  87     if (printinfo)
  88         qemu_error("OK bus %d, unit %d\n", scsibus->busnr, scsidev->id);
  89     return 0;
  90 }
  91
  92 void drive_hot_add(Monitor *mon, const QDict *qdict)
  93 {
  94     int dom, pci_bus;
  95     unsigned slot;
  96     int type, bus;
  97     PCIDevice *dev;
  98     DriveInfo *dinfo = NULL;
  99     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 100     const char *opts = qdict_get_str(qdict, "opts");
 101
 102     dinfo = add_init_drive(opts);
 103     if (!dinfo)
 104         goto err;
 105     if (dinfo->devaddr) {
 106         monitor_printf(mon, "Parameter addr not supported\n");
 107         goto err;
 108     }
 109     type = dinfo->type;
 110     bus = drive_get_max_bus (type);
 111
 112     switch (type) {
 113     case IF_SCSI:
 114         if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
 115             goto err;
 116         }
 117         dev = pci_find_device(pci_bus, slot, 0);
 118         if (!dev) {
 119             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
 120             goto err;
 121         }
 122         if (scsi_hot_add(&dev->qdev, dinfo, 1) != 0) {
 123             goto err;
 124         }
 125         break;
 126     case IF_NONE:
 127         monitor_printf(mon, "OK\n");
 128         break;
 129     default:
 130         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
 131         goto err;
 132     }
 133     return;
 134
 135 err:
 136     if (dinfo)
 137         drive_uninit(dinfo);
 138     return;
 139 }
 140
 141 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 142                                            const char *devaddr,
 143                                            const char *opts)
 144 {
 145     PCIDevice *dev;
 146     DriveInfo *dinfo = NULL;
 147     int type = -1;
 148     char buf[128];
 149     PCIBus *bus;
 150     int devfn;
 151
 152     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 153         if (!strcmp(buf, "scsi"))
 154             type = IF_SCSI;
 155         else if (!strcmp(buf, "virtio")) {
 156             type = IF_VIRTIO;
 157         } else {
 158             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 159             return NULL;
 160         }
 161     } else {
 162         monitor_printf(mon, "no if= specified\n");
 163         return NULL;
 164     }
 165
 166     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 167         dinfo = add_init_drive(opts);
 168         if (!dinfo)
 169             return NULL;
 170         if (dinfo->devaddr) {
 171             monitor_printf(mon, "Parameter addr not supported\n");
 172             return NULL;
 173         }
 174     } else {
 175         dinfo = NULL;
 176     }
 177
 178     bus = pci_get_bus_devfn(&devfn, devaddr);
 179     if (!bus) {
 180         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 181         return NULL;
 182     }
 183
 184     switch (type) {
 185     case IF_SCSI:
 186         if (!dinfo) {
 187             monitor_printf(mon, "scsi requires a backing file/device.\n");
 188             return NULL;
 189         }
 190         dev = pci_create(bus, devfn, "lsi53c895a");
 191         if (qdev_init(&dev->qdev) < 0)
 192             dev = NULL;
 193         if (dev) {
 194             if (scsi_hot_add(&dev->qdev, dinfo, 0) != 0) {
 195                 qdev_unplug(&dev->qdev);
 196                 dev = NULL;
 197             }
 198         }
 199         break;
 200     case IF_VIRTIO:
 201         if (!dinfo) {
 202             monitor_printf(mon, "virtio requires a backing file/device.\n");
 203             return NULL;
 204         }
 205         dev = pci_create(bus, devfn, "virtio-blk-pci");
 206         qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
 207         if (qdev_init(&dev->qdev) < 0)
 208             dev = NULL;
 209         break;
 210     default:
 211         dev = NULL;
 212     }
 213     return dev;
 214 }
 215
 216 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
 217 static PCIDevice *qemu_pci_hot_assign_device(Monitor *mon,
 218                                              const char *devaddr,
 219                                              const char *opts_str)
 220 {
 221     QemuOpts *opts;
 222     DeviceState *dev;
 223
 224     opts = add_assigned_device(opts_str);
 225     if (opts == NULL) {
 226         monitor_printf(mon, "Error adding device; check syntax\n");
 227         return NULL;
 228     }
 229     dev = qdev_device_add(opts);
 230     return DO_UPCAST(PCIDevice, qdev, dev);
 231 }
 232 #endif /* CONFIG_KVM_DEVICE_ASSIGNMENT */
 233
 234 void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 235 {
 236     PCIDevice *dev = NULL;
 237     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 238     const char *type = qdict_get_str(qdict, "type");
 239     const char *opts = qdict_get_try_str(qdict, "opts");
 240
 241     /* strip legacy tag */
 242     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 243         pci_addr += 9;
 244     }
 245
 246     if (!opts) {
 247         opts = "";
 248     }
 249
 250     if (!strcmp(pci_addr, "auto"))
 251         pci_addr = NULL;
 252
 253     if (strcmp(type, "nic") == 0)
 254         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 255     else if (strcmp(type, "storage") == 0)
 256         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 257 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
 258     else if (strcmp(type, "host") == 0)
 259         dev = qemu_pci_hot_assign_device(mon, pci_addr, opts);
 260 #endif /* CONFIG_KVM_DEVICE_ASSIGNMENT */
 261     else
 262         monitor_printf(mon, "invalid type: %s\n", type);
 263
 264     if (dev) {
 265         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 266                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 267                        PCI_FUNC(dev->devfn));
 268     } else
 269         monitor_printf(mon, "failed to add %s\n", opts);
 270 }
 271 #endif
 272
 273 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 274 {
 275     PCIDevice *d;
 276     int dom, bus;
 277     unsigned slot;
 278
 279     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 280         return;
 281     }
 282
 283     d = pci_find_device(bus, slot, 0);
 284     if (!d) {
 285         monitor_printf(mon, "slot %d empty\n", slot);
 286         return;
 287     }
 288     qdev_unplug(&d->qdev);
 289 }
 290
 291 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict,
 292                               QObject **ret_data)
 293 {
 294     pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 295 }