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