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