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