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 (!qbus_is_hotpluggable(BUS(bus))) {
  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 (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     Error *local_err = NULL;
 111
 112     scsibus = (SCSIBus *)
 113         object_dynamic_cast(OBJECT(QLIST_FIRST(&adapter->child_bus)),
 114                             TYPE_SCSI_BUS);
 115     if (!scsibus) {
 116         error_report("Device is not a SCSI adapter");
 117         return -1;
 118     }
 119
 120     /*
 121      * drive_init() tries to find a default for dinfo->unit.  Doesn't
 122      * work at all for hotplug though as we assign the device to a
 123      * specific bus instead of the first bus with spare scsi ids.
 124      *
 125      * Ditch the calculated value and reload from option string (if
 126      * specified).
 127      */
 128     dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
 129     dinfo->bus = scsibus->busnr;
 130     scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit,
 131                                         false, -1, NULL, &local_err);
 132     if (!scsidev) {
 133         error_report("%s", error_get_pretty(local_err));
 134         error_free(local_err);
 135         return -1;
 136     }
 137     dinfo->unit = scsidev->id;
 138
 139     if (printinfo)
 140         monitor_printf(mon, "OK bus %d, unit %d\n",
 141                        scsibus->busnr, scsidev->id);
 142     return 0;
 143 }
 144
 145 int pci_drive_hot_add(Monitor *mon, const QDict *qdict, DriveInfo *dinfo)
 146 {
 147     int pci_bus;
 148     unsigned slot;
 149     PCIBus *root = pci_find_primary_bus();
 150     PCIDevice *dev;
 151     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 152
 153     switch (dinfo->type) {
 154     case IF_SCSI:
 155         if (!root) {
 156             monitor_printf(mon, "no primary PCI bus (if there are multiple"
 157                            " PCI roots, you must use device_add instead)");
 158             goto err;
 159         }
 160         if (pci_read_devaddr(mon, pci_addr, &pci_bus, &slot)) {
 161             goto err;
 162         }
 163         dev = pci_find_device(root, pci_bus, PCI_DEVFN(slot, 0));
 164         if (!dev) {
 165             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
 166             goto err;
 167         }
 168         if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
 169             goto err;
 170         }
 171         break;
 172     default:
 173         monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
 174         goto err;
 175     }
 176
 177     return 0;
 178 err:
 179     return -1;
 180 }
 181
 182 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 183                                            const char *devaddr,
 184                                            const char *opts)
 185 {
 186     PCIDevice *dev;
 187     DriveInfo *dinfo = NULL;
 188     int type = -1;
 189     char buf[128];
 190     PCIBus *root = pci_find_primary_bus();
 191     PCIBus *bus;
 192     int devfn;
 193
 194     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 195         if (!strcmp(buf, "scsi"))
 196             type = IF_SCSI;
 197         else if (!strcmp(buf, "virtio")) {
 198             type = IF_VIRTIO;
 199         } else {
 200             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 201             return NULL;
 202         }
 203     } else {
 204         monitor_printf(mon, "no if= specified\n");
 205         return NULL;
 206     }
 207
 208     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 209         dinfo = add_init_drive(opts);
 210         if (!dinfo)
 211             return NULL;
 212         if (dinfo->devaddr) {
 213             monitor_printf(mon, "Parameter addr not supported\n");
 214             return NULL;
 215         }
 216     } else {
 217         dinfo = NULL;
 218     }
 219
 220     if (!root) {
 221         monitor_printf(mon, "no primary PCI bus (if there are multiple"
 222                        " PCI roots, you must use device_add instead)");
 223         return NULL;
 224     }
 225     bus = pci_get_bus_devfn(&devfn, root, devaddr);
 226     if (!bus) {
 227         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 228         return NULL;
 229     }
 230     if (!qbus_is_hotpluggable(BUS(bus))) {
 231         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
 232         return NULL;
 233     }
 234
 235     switch (type) {
 236     case IF_SCSI:
 237         dev = pci_create(bus, devfn, "lsi53c895a");
 238         if (qdev_init(&dev->qdev) < 0)
 239             dev = NULL;
 240         if (dev && dinfo) {
 241             if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
 242                 qdev_unplug(&dev->qdev, NULL);
 243                 dev = NULL;
 244             }
 245         }
 246         break;
 247     case IF_VIRTIO:
 248         if (!dinfo) {
 249             monitor_printf(mon, "virtio requires a backing file/device.\n");
 250             return NULL;
 251         }
 252         dev = pci_create(bus, devfn, "virtio-blk-pci");
 253         if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
 254             object_unparent(OBJECT(dev));
 255             dev = NULL;
 256             break;
 257         }
 258         if (qdev_init(&dev->qdev) < 0)
 259             dev = NULL;
 260         break;
 261     default:
 262         dev = NULL;
 263     }
 264     return dev;
 265 }
 266
 267 void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 268 {
 269     PCIDevice *dev = NULL;
 270     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 271     const char *type = qdict_get_str(qdict, "type");
 272     const char *opts = qdict_get_try_str(qdict, "opts");
 273
 274     /* strip legacy tag */
 275     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 276         pci_addr += 9;
 277     }
 278
 279     if (!opts) {
 280         opts = "";
 281     }
 282
 283     if (!strcmp(pci_addr, "auto"))
 284         pci_addr = NULL;
 285
 286     if (strcmp(type, "nic") == 0) {
 287         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 288     } else if (strcmp(type, "storage") == 0) {
 289         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 290     } else {
 291         monitor_printf(mon, "invalid type: %s\n", type);
 292     }
 293
 294     if (dev) {
 295         monitor_printf(mon, "OK root bus %s, bus %d, slot %d, function %d\n",
 296                        pci_root_bus_path(dev),
 297                        pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 298                        PCI_FUNC(dev->devfn));
 299     } else
 300         monitor_printf(mon, "failed to add %s\n", opts);
 301 }
 302
 303 static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 304 {
 305     PCIBus *root = pci_find_primary_bus();
 306     PCIDevice *d;
 307     int bus;
 308     unsigned slot;
 309     Error *local_err = NULL;
 310
 311     if (!root) {
 312         monitor_printf(mon, "no primary PCI bus (if there are multiple"
 313                        " PCI roots, you must use device_del instead)");
 314         return -1;
 315     }
 316
 317     if (pci_read_devaddr(mon, pci_addr, &bus, &slot)) {
 318         return -1;
 319     }
 320
 321     d = pci_find_device(root, bus, PCI_DEVFN(slot, 0));
 322     if (!d) {
 323         monitor_printf(mon, "slot %d empty\n", slot);
 324         return -1;
 325     }
 326
 327     qdev_unplug(&d->qdev, &local_err);
 328     if (local_err) {
 329         monitor_printf(mon, "%s\n", error_get_pretty(local_err));
 330         error_free(local_err);
 331         return -1;
 332     }
 333
 334     return 0;
 335 }
 336
 337 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
 338 {
 339     pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 340 }