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
  36 #if defined(TARGET_I386) || defined(TARGET_X86_64)
  37 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
  38                                        const char *devaddr, const char *opts)
  39 {
  40     int ret;
  41
  42     ret = net_client_init(mon, "nic", opts);
  43     if (ret < 0)
  44         return NULL;
  45     if (nd_table[ret].devaddr) {
  46         monitor_printf(mon, "Parameter addr not supported\n");
  47         return NULL;
  48     }
  49
  50     if (nd_table[ret].model && !pci_nic_supported(nd_table[ret].model))
  51         return NULL;
  52
  53     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  54 }
  55
  56 void drive_hot_add(Monitor *mon, const QDict *qdict)
  57 {
  58     int dom, pci_bus;
  59     unsigned slot;
  60     int type, bus;
  61     PCIDevice *dev;
  62     DriveInfo *dinfo = NULL;
  63     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
  64     const char *opts = qdict_get_str(qdict, "opts");
  65     BusState *scsibus;
  66
  67     dinfo = add_init_drive(opts);
  68     if (!dinfo)
  69         goto err;
  70     if (dinfo->devaddr) {
  71         monitor_printf(mon, "Parameter addr not supported\n");
  72         goto err;
  73     }
  74     type = dinfo->type;
  75     bus = drive_get_max_bus (type);
  76
  77     switch (type) {
  78     case IF_SCSI:
  79         if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
  80             goto err;
  81         }
  82         dev = pci_find_device(pci_bus, slot, 0);
  83         if (!dev) {
  84             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
  85             goto err;
  86         }
  87         scsibus = QLIST_FIRST(&dev->qdev.child_bus);
  88         scsi_bus_legacy_add_drive(DO_UPCAST(SCSIBus, qbus, scsibus),
  89                                   dinfo, dinfo->unit);
  90         monitor_printf(mon, "OK bus %d, unit %d\n",
  91                        dinfo->bus,
  92                        dinfo->unit);
  93         break;
  94     case IF_NONE:
  95         monitor_printf(mon, "OK\n");
  96         break;
  97     default:
  98         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
  99         goto err;
 100     }
 101     return;
 102
 103 err:
 104     if (dinfo)
 105         drive_uninit(dinfo);
 106     return;
 107 }
 108
 109 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 110                                            const char *devaddr,
 111                                            const char *opts)
 112 {
 113     PCIDevice *dev;
 114     DriveInfo *dinfo = NULL;
 115     int type = -1;
 116     char buf[128];
 117     PCIBus *bus;
 118     int devfn;
 119
 120     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 121         if (!strcmp(buf, "scsi"))
 122             type = IF_SCSI;
 123         else if (!strcmp(buf, "virtio")) {
 124             type = IF_VIRTIO;
 125         } else {
 126             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 127             return NULL;
 128         }
 129     } else {
 130         monitor_printf(mon, "no if= specified\n");
 131         return NULL;
 132     }
 133
 134     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 135         dinfo = add_init_drive(opts);
 136         if (!dinfo)
 137             return NULL;
 138         if (dinfo->devaddr) {
 139             monitor_printf(mon, "Parameter addr not supported\n");
 140             return NULL;
 141         }
 142     } else {
 143         dinfo = NULL;
 144     }
 145
 146     bus = pci_get_bus_devfn(&devfn, devaddr);
 147     if (!bus) {
 148         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 149         return NULL;
 150     }
 151
 152     switch (type) {
 153     case IF_SCSI:
 154         dev = pci_create(bus, devfn, "lsi53c895a");
 155         break;
 156     case IF_VIRTIO:
 157         if (!dinfo) {
 158             monitor_printf(mon, "virtio requires a backing file/device.\n");
 159             return NULL;
 160         }
 161         dev = pci_create(bus, devfn, "virtio-blk-pci");
 162         qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
 163         break;
 164     default:
 165         dev = NULL;
 166     }
 167     if (dev)
 168         qdev_init(&dev->qdev);
 169     return dev;
 170 }
 171
 172 void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 173 {
 174     PCIDevice *dev = NULL;
 175     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 176     const char *type = qdict_get_str(qdict, "type");
 177     const char *opts = qdict_get_try_str(qdict, "opts");
 178
 179     /* strip legacy tag */
 180     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 181         pci_addr += 9;
 182     }
 183
 184     if (!opts) {
 185         opts = "";
 186     }
 187
 188     if (!strcmp(pci_addr, "auto"))
 189         pci_addr = NULL;
 190
 191     if (strcmp(type, "nic") == 0)
 192         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 193     else if (strcmp(type, "storage") == 0)
 194         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 195     else
 196         monitor_printf(mon, "invalid type: %s\n", type);
 197
 198     if (dev) {
 199         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 200                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 201                        PCI_FUNC(dev->devfn));
 202     } else
 203         monitor_printf(mon, "failed to add %s\n", opts);
 204 }
 205 #endif
 206
 207 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 208 {
 209     PCIDevice *d;
 210     int dom, bus;
 211     unsigned slot;
 212
 213     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 214         return;
 215     }
 216
 217     d = pci_find_device(bus, slot, 0);
 218     if (!d) {
 219         monitor_printf(mon, "slot %d empty\n", slot);
 220         return;
 221     }
 222     qdev_unplug(&d->qdev);
 223 }
 224
 225 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
 226 {
 227     pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 228 }
 229
 230 static int pci_match_fn(void *dev_private, void *arg)
 231 {
 232     PCIDevice *dev = dev_private;
 233     PCIDevice *match = arg;
 234
 235     return (dev == match);
 236 }
 237
 238 /*
 239  * OS has executed _EJ0 method, we now can remove the device
 240  */
 241 void pci_device_hot_remove_success(PCIDevice *d)
 242 {
 243     int class_code;
 244
 245     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 246
 247     switch(class_code) {
 248     case PCI_BASE_CLASS_NETWORK:
 249         destroy_nic(pci_match_fn, d);
 250         break;
 251     }
 252 }
 253