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 "virtio-blk.h"
  34
  35 #if defined(TARGET_I386) || defined(TARGET_X86_64)
  36 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
  37                                        const char *devaddr, const char *opts)
  38 {
  39     int ret;
  40
  41     ret = net_client_init(mon, "nic", opts);
  42     if (ret < 0)
  43         return NULL;
  44     if (nd_table[ret].devaddr) {
  45         monitor_printf(mon, "Parameter addr not supported\n");
  46         return NULL;
  47     }
  48     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  49 }
  50
  51 void drive_hot_add(Monitor *mon, const char *pci_addr, const char *opts)
  52 {
  53     int dom, pci_bus;
  54     unsigned slot;
  55     int type, bus;
  56     int success = 0;
  57     PCIDevice *dev;
  58     DriveInfo *dinfo;
  59
  60     if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
  61         return;
  62     }
  63
  64     dev = pci_find_device(pci_bus, slot, 0);
  65     if (!dev) {
  66         monitor_printf(mon, "no pci device with address %s\n", pci_addr);
  67         return;
  68     }
  69
  70     dinfo = add_init_drive(opts);
  71     if (!dinfo)
  72         return;
  73     if (dinfo->devaddr) {
  74         monitor_printf(mon, "Parameter addr not supported\n");
  75         return;
  76     }
  77     type = dinfo->type;
  78     bus = drive_get_max_bus (type);
  79
  80     switch (type) {
  81     case IF_SCSI:
  82         success = 1;
  83         lsi_scsi_attach(&dev->qdev, dinfo->bdrv,
  84                         dinfo->unit);
  85         break;
  86     default:
  87         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
  88     }
  89
  90     if (success)
  91         monitor_printf(mon, "OK bus %d, unit %d\n",
  92                        dinfo->bus,
  93                        dinfo->unit);
  94     return;
  95 }
  96
  97 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
  98                                            const char *devaddr,
  99                                            const char *opts)
 100 {
 101     PCIDevice *dev;
 102     DriveInfo *dinfo;
 103     int type = -1;
 104     char buf[128];
 105
 106     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 107         if (!strcmp(buf, "scsi"))
 108             type = IF_SCSI;
 109         else if (!strcmp(buf, "virtio")) {
 110             type = IF_VIRTIO;
 111         } else {
 112             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 113             return NULL;
 114         }
 115     } else {
 116         monitor_printf(mon, "no if= specified\n");
 117         return NULL;
 118     }
 119
 120     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 121         dinfo = add_init_drive(opts);
 122         if (!dinfo)
 123             return NULL;
 124         if (dinfo->devaddr) {
 125             monitor_printf(mon, "Parameter addr not supported\n");
 126             return NULL;
 127         }
 128     } else {
 129         dinfo = NULL;
 130     }
 131
 132     switch (type) {
 133     case IF_SCSI:
 134         dev = pci_create("lsi53c895a", devaddr);
 135         break;
 136     case IF_VIRTIO:
 137         if (!dinfo) {
 138             monitor_printf(mon, "virtio requires a backing file/device.\n");
 139             return NULL;
 140         }
 141         dev = pci_create("virtio-blk-pci", devaddr);
 142         qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
 143         break;
 144     default:
 145         dev = NULL;
 146     }
 147     if (dev)
 148         qdev_init(&dev->qdev);
 149     return dev;
 150 }
 151
 152 void pci_device_hot_add(Monitor *mon, const char *pci_addr, const char *type,
 153                         const char *opts)
 154 {
 155     PCIDevice *dev = NULL;
 156
 157     /* strip legacy tag */
 158     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 159         pci_addr += 9;
 160     }
 161
 162     if (!opts) {
 163         opts = "";
 164     }
 165
 166     if (!strcmp(pci_addr, "auto"))
 167         pci_addr = NULL;
 168
 169     if (strcmp(type, "nic") == 0)
 170         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 171     else if (strcmp(type, "storage") == 0)
 172         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 173     else
 174         monitor_printf(mon, "invalid type: %s\n", type);
 175
 176     if (dev) {
 177         qemu_system_device_hot_add(pci_bus_num(dev->bus),
 178                                    PCI_SLOT(dev->devfn), 1);
 179         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 180                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 181                        PCI_FUNC(dev->devfn));
 182     } else
 183         monitor_printf(mon, "failed to add %s\n", opts);
 184 }
 185 #endif
 186
 187 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 188 {
 189     PCIDevice *d;
 190     int dom, bus;
 191     unsigned slot;
 192
 193     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 194         return;
 195     }
 196
 197     d = pci_find_device(bus, slot, 0);
 198     if (!d) {
 199         monitor_printf(mon, "slot %d empty\n", slot);
 200         return;
 201     }
 202
 203     qemu_system_device_hot_add(bus, slot, 0);
 204 }
 205
 206 static int pci_match_fn(void *dev_private, void *arg)
 207 {
 208     PCIDevice *dev = dev_private;
 209     PCIDevice *match = arg;
 210
 211     return (dev == match);
 212 }
 213
 214 /*
 215  * OS has executed _EJ0 method, we now can remove the device
 216  */
 217 void pci_device_hot_remove_success(int pcibus, int slot)
 218 {
 219     PCIDevice *d = pci_find_device(pcibus, slot, 0);
 220     int class_code;
 221
 222     if (!d) {
 223         monitor_printf(cur_mon, "invalid slot %d\n", slot);
 224         return;
 225     }
 226
 227     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 228
 229     switch(class_code) {
 230     case PCI_BASE_CLASS_STORAGE:
 231         destroy_bdrvs(pci_match_fn, d);
 232         break;
 233     case PCI_BASE_CLASS_NETWORK:
 234         destroy_nic(pci_match_fn, d);
 235         break;
 236     }
 237
 238     pci_unregister_device(d);
 239 }
 240