hw/pci/pci-hotplug-old.c

   1 /*
   2  * Deprecated PCI hotplug interface support
   3  * This covers the old pci_add / pci_del command, whereas the more general
   4  * device_add / device_del commands are now preferred.
   5  *
   6  * Copyright (c) 2004 Fabrice Bellard
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 #include "hw/hw.h"
  28 #include "hw/boards.h"
  29 #include "hw/pci/pci.h"
  30 #include "net/net.h"
  31 #include "hw/i386/pc.h"
  32 #include "monitor/monitor.h"
  33 #include "hw/scsi/scsi.h"
  34 #include "hw/virtio/virtio-blk.h"
  35 #include "qemu/config-file.h"
  36 #include "sysemu/blockdev.h"
  37 #include "qapi/error.h"
  38
  39 static int pci_read_devaddr(Monitor *mon, const char *addr,
  40                             int *busp, unsigned *slotp)
  41 {
  42     int dom;
  43
  44     /* strip legacy tag */
  45     if (!strncmp(addr, "pci_addr=", 9)) {
  46         addr += 9;
  47     }
  48     if (pci_parse_devaddr(addr, &dom, busp, slotp, NULL)) {
  49         monitor_printf(mon, "Invalid pci address\n");
  50         return -1;
  51     }
  52     if (dom != 0) {
  53         monitor_printf(mon, "Multiple PCI domains not supported, use device_add\n");
  54         return -1;
  55     }
  56     return 0;
  57 }
  58
  59 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
  60                                        const char *devaddr,
  61                                        const char *opts_str)
  62 {
  63     Error *local_err = NULL;
  64     QemuOpts *opts;
  65     PCIBus *root = pci_find_primary_bus();
  66     PCIBus *bus;
  67     int ret, devfn;
  68
  69     if (!root) {
  70         monitor_printf(mon, "no primary PCI bus (if there are multiple"
  71                        " PCI roots, you must use device_add instead)");
  72         return NULL;
  73     }
  74
  75     bus = pci_get_bus_devfn(&devfn, root, devaddr);
  76     if (!bus) {
  77         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
  78         return NULL;
  79     }
  80     if (!((BusState*)bus)->allow_hotplug) {
  81         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
  82         return NULL;
  83     }
  84
  85     opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
  86     if (!opts) {
  87         return NULL;
  88     }
  89
  90     qemu_opt_set(opts, "type", "nic");
  91
  92     ret = net_client_init(opts, 0, &local_err);
  93     if (error_is_set(&local_err)) {
  94         qerror_report_err(local_err);
  95         error_free(local_err);
  96         return NULL;
  97     }
  98     if (nd_table[ret].devaddr) {
  99         monitor_printf(mon, "Parameter addr not supported\n");
 100         return NULL;
 101     }
 102     return pci_nic_init(&nd_table[ret], root, "rtl8139", devaddr);
 103 }
 104
 105 static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
 106                         DriveInfo *dinfo, int printinfo)
 107 {
 108     SCSIBus *scsibus;
 109     SCSIDevice *scsidev;
 110
 111     scsibus = (SCSIBus *)
 112         object_dynamic_cast(OBJECT(QLIST_FIRST(&adapter->child_bus)),
 113                             TYPE_SCSI_BUS);
 114     if (!scsibus) {
 115         error_report("Device is not a SCSI adapter");
 116         return -1;
 117     }
 118
 119     /*
 120      * drive_init() tries to find a default for dinfo->unit.  Doesn't
 121      * work at all for hotplug though as we assign the device to a
 122      * specific bus instead of the first bus with spare scsi ids.
 123      *
 124      * Ditch the calculated value and reload from option string (if
 125      * specified).
 126      */
 127     dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
 128     dinfo->bus = scsibus->busnr;
 129     scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit,
 130                                         false, -1, NULL, NULL);
 131     if (!scsidev) {
 132         return -1;
 133     }
 134     dinfo->unit = scsidev->id;
 135
 136     if (printinfo)
 137         monitor_printf(mon, "OK bus %d, unit %d\n",
 138                        scsibus->busnr, scsidev->id);
 139     return 0;
 140 }
 141
 142 int pci_drive_hot_add(Monitor *mon, const QDict *qdict, DriveInfo *dinfo)
 143 {
 144     int pci_bus;
 145     unsigned slot;
 146     PCIBus *root = pci_find_primary_bus();
 147     PCIDevice *dev;
 148     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 149
 150     switch (dinfo->type) {
 151     case IF_SCSI:
 152         if (!root) {
 153             monitor_printf(mon, "no primary PCI bus (if there are multiple"
 154                            " PCI roots, you must use device_add instead)");
 155             goto err;
 156         }
 157         if (pci_read_devaddr(mon, pci_addr, &pci_bus, &slot)) {
 158             goto err;
 159         }
 160         dev = pci_find_device(root, pci_bus, PCI_DEVFN(slot, 0));
 161         if (!dev) {
 162             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
 163             goto err;
 164         }
 165         if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
 166             goto err;
 167         }
 168         break;
 169     default:
 170         monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
 171         goto err;
 172     }
 173
 174     return 0;
 175 err:
 176     return -1;
 177 }
 178
 179 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 180                                            const char *devaddr,
 181                                            const char *opts)
 182 {
 183     PCIDevice *dev;
 184     DriveInfo *dinfo = NULL;
 185     int type = -1;
 186     char buf[128];
 187     PCIBus *root = pci_find_primary_bus();
 188     PCIBus *bus;
 189     int devfn;
 190
 191     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 192         if (!strcmp(buf, "scsi"))
 193             type = IF_SCSI;
 194         else if (!strcmp(buf, "virtio")) {
 195             type = IF_VIRTIO;
 196         } else {
 197             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 198             return NULL;
 199         }
 200     } else {
 201         monitor_printf(mon, "no if= specified\n");
 202         return NULL;
 203     }
 204
 205     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 206         dinfo = add_init_drive(opts);
 207         if (!dinfo)
 208             return NULL;
 209         if (dinfo->devaddr) {
 210             monitor_printf(mon, "Parameter addr not supported\n");
 211             return NULL;
 212         }
 213     } else {
 214         dinfo = NULL;
 215     }
 216
 217     if (!root) {
 218         monitor_printf(mon, "no primary PCI bus (if there are multiple"
 219                        " PCI roots, you must use device_add instead)");
 220         return NULL;
 221     }
 222     bus = pci_get_bus_devfn(&devfn, root, devaddr);
 223     if (!bus) {
 224         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 225         return NULL;
 226     }
 227     if (!((BusState*)bus)->allow_hotplug) {
 228         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
 229         return NULL;
 230     }
 231
 232     switch (type) {
 233     case IF_SCSI:
 234         dev = pci_create(bus, devfn, "lsi53c895a");
 235         if (qdev_init(&dev->qdev) < 0)
 236             dev = NULL;
 237         if (dev && dinfo) {
 238             if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
 239                 qdev_unplug(&dev->qdev, NULL);
 240                 dev = NULL;
 241             }
 242         }
 243         break;
 244     case IF_VIRTIO:
 245         if (!dinfo) {
 246             monitor_printf(mon, "virtio requires a backing file/device.\n");
 247             return NULL;
 248         }
 249         dev = pci_create(bus, devfn, "virtio-blk-pci");
 250         if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
 251             qdev_free(&dev->qdev);
 252             dev = NULL;
 253             break;
 254         }
 255         if (qdev_init(&dev->qdev) < 0)
 256             dev = NULL;
 257         break;
 258     default:
 259         dev = NULL;
 260     }
 261     return dev;
 262 }
 263
 264 void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 265 {
 266     PCIDevice *dev = NULL;
 267     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 268     const char *type = qdict_get_str(qdict, "type");
 269     const char *opts = qdict_get_try_str(qdict, "opts");
 270
 271     /* strip legacy tag */
 272     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 273         pci_addr += 9;
 274     }
 275
 276     if (!opts) {
 277         opts = "";
 278     }
 279
 280     if (!strcmp(pci_addr, "auto"))
 281         pci_addr = NULL;
 282
 283     if (strcmp(type, "nic") == 0) {
 284         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 285     } else if (strcmp(type, "storage") == 0) {
 286         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 287     } else {
 288         monitor_printf(mon, "invalid type: %s\n", type);
 289     }
 290
 291     if (dev) {
 292         monitor_printf(mon, "OK root bus %s, bus %d, slot %d, function %d\n",
 293                        pci_root_bus_path(dev),
 294                        pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 295                        PCI_FUNC(dev->devfn));
 296     } else
 297         monitor_printf(mon, "failed to add %s\n", opts);
 298 }
 299
 300 static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 301 {
 302     PCIBus *root = pci_find_primary_bus();
 303     PCIDevice *d;
 304     int bus;
 305     unsigned slot;
 306     Error *local_err = NULL;
 307
 308     if (!root) {
 309         monitor_printf(mon, "no primary PCI bus (if there are multiple"
 310                        " PCI roots, you must use device_del instead)");
 311         return -1;
 312     }
 313
 314     if (pci_read_devaddr(mon, pci_addr, &bus, &slot)) {
 315         return -1;
 316     }
 317
 318     d = pci_find_device(root, bus, PCI_DEVFN(slot, 0));
 319     if (!d) {
 320         monitor_printf(mon, "slot %d empty\n", slot);
 321         return -1;
 322     }
 323
 324     qdev_unplug(&d->qdev, &local_err);
 325     if (error_is_set(&local_err)) {
 326         monitor_printf(mon, "%s\n", error_get_pretty(local_err));
 327         error_free(local_err);
 328         return -1;
 329     }
 330
 331     return 0;
 332 }
 333
 334 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
 335 {
 336     pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 337 }