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/block-backend.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,
 131                                         blk_by_legacy_dinfo(dinfo),
 132                                         dinfo->unit, false, -1, NULL,
 133                                         &local_err);
 134     if (!scsidev) {
 135         error_report_err(local_err);
 136         return -1;
 137     }
 138     dinfo->unit = scsidev->id;
 139
 140     if (printinfo)
 141         monitor_printf(mon, "OK bus %d, unit %d\n",
 142                        scsibus->busnr, scsidev->id);
 143     return 0;
 144 }
 145
 146 int pci_drive_hot_add(Monitor *mon, const QDict *qdict, DriveInfo *dinfo)
 147 {
 148     int pci_bus;
 149     unsigned slot;
 150     PCIBus *root = pci_find_primary_bus();
 151     PCIDevice *dev;
 152     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 153
 154     switch (dinfo->type) {
 155     case IF_SCSI:
 156         if (!root) {
 157             monitor_printf(mon, "no primary PCI bus (if there are multiple"
 158                            " PCI roots, you must use device_add instead)");
 159             goto err;
 160         }
 161         if (pci_read_devaddr(mon, pci_addr, &pci_bus, &slot)) {
 162             goto err;
 163         }
 164         dev = pci_find_device(root, pci_bus, PCI_DEVFN(slot, 0));
 165         if (!dev) {
 166             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
 167             goto err;
 168         }
 169         if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
 170             goto err;
 171         }
 172         break;
 173     default:
 174         monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
 175         goto err;
 176     }
 177
 178     return 0;
 179 err:
 180     return -1;
 181 }
 182
 183 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 184                                            const char *devaddr,
 185                                            const char *opts)
 186 {
 187     PCIDevice *dev;
 188     DriveInfo *dinfo = NULL;
 189     int type = -1;
 190     char buf[128];
 191     PCIBus *root = pci_find_primary_bus();
 192     PCIBus *bus;
 193     int devfn;
 194
 195     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 196         if (!strcmp(buf, "scsi"))
 197             type = IF_SCSI;
 198         else if (!strcmp(buf, "virtio")) {
 199             type = IF_VIRTIO;
 200         } else {
 201             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 202             return NULL;
 203         }
 204     } else {
 205         monitor_printf(mon, "no if= specified\n");
 206         return NULL;
 207     }
 208
 209     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 210         dinfo = add_init_drive(opts);
 211         if (!dinfo)
 212             return NULL;
 213         if (dinfo->devaddr) {
 214             monitor_printf(mon, "Parameter addr not supported\n");
 215             return NULL;
 216         }
 217     } else {
 218         dinfo = NULL;
 219     }
 220
 221     if (!root) {
 222         monitor_printf(mon, "no primary PCI bus (if there are multiple"
 223                        " PCI roots, you must use device_add instead)");
 224         return NULL;
 225     }
 226     bus = pci_get_bus_devfn(&devfn, root, devaddr);
 227     if (!bus) {
 228         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 229         return NULL;
 230     }
 231     if (!qbus_is_hotpluggable(BUS(bus))) {
 232         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
 233         return NULL;
 234     }
 235
 236     switch (type) {
 237     case IF_SCSI:
 238         dev = pci_create(bus, devfn, "lsi53c895a");
 239         if (qdev_init(&dev->qdev) < 0)
 240             dev = NULL;
 241         if (dev && dinfo) {
 242             if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
 243                 qdev_unplug(&dev->qdev, NULL);
 244                 dev = NULL;
 245             }
 246         }
 247         break;
 248     case IF_VIRTIO:
 249         if (!dinfo) {
 250             monitor_printf(mon, "virtio requires a backing file/device.\n");
 251             return NULL;
 252         }
 253         dev = pci_create(bus, devfn, "virtio-blk-pci");
 254         if (qdev_prop_set_drive(&dev->qdev, "drive",
 255                                 blk_by_legacy_dinfo(dinfo)) < 0) {
 256             object_unparent(OBJECT(dev));
 257             dev = NULL;
 258             break;
 259         }
 260         if (qdev_init(&dev->qdev) < 0)
 261             dev = NULL;
 262         break;
 263     default:
 264         dev = NULL;
 265     }
 266     return dev;
 267 }
 268
 269 void hmp_pci_add(Monitor *mon, const QDict *qdict)
 270 {
 271     PCIDevice *dev = NULL;
 272     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 273     const char *type = qdict_get_str(qdict, "type");
 274     const char *opts = qdict_get_try_str(qdict, "opts");
 275
 276     /* strip legacy tag */
 277     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 278         pci_addr += 9;
 279     }
 280
 281     if (!opts) {
 282         opts = "";
 283     }
 284
 285     if (!strcmp(pci_addr, "auto"))
 286         pci_addr = NULL;
 287
 288     if (strcmp(type, "nic") == 0) {
 289         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 290     } else if (strcmp(type, "storage") == 0) {
 291         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 292     } else {
 293         monitor_printf(mon, "invalid type: %s\n", type);
 294     }
 295
 296     if (dev) {
 297         monitor_printf(mon, "OK root bus %s, bus %d, slot %d, function %d\n",
 298                        pci_root_bus_path(dev),
 299                        pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 300                        PCI_FUNC(dev->devfn));
 301     } else
 302         monitor_printf(mon, "failed to add %s\n", opts);
 303 }
 304
 305 static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 306 {
 307     PCIBus *root = pci_find_primary_bus();
 308     PCIDevice *d;
 309     int bus;
 310     unsigned slot;
 311     Error *local_err = NULL;
 312
 313     if (!root) {
 314         monitor_printf(mon, "no primary PCI bus (if there are multiple"
 315                        " PCI roots, you must use device_del instead)");
 316         return -1;
 317     }
 318
 319     if (pci_read_devaddr(mon, pci_addr, &bus, &slot)) {
 320         return -1;
 321     }
 322
 323     d = pci_find_device(root, bus, PCI_DEVFN(slot, 0));
 324     if (!d) {
 325         monitor_printf(mon, "slot %d empty\n", slot);
 326         return -1;
 327     }
 328
 329     qdev_unplug(&d->qdev, &local_err);
 330     if (local_err) {
 331         monitor_printf(mon, "%s\n", error_get_pretty(local_err));
 332         error_free(local_err);
 333         return -1;
 334     }
 335
 336     return 0;
 337 }
 338
 339 void hmp_pci_del(Monitor *mon, const QDict *qdict)
 340 {
 341     pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 342 }