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 #include "device-assignment.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 char *pci_addr, const char *opts)
  53 {
  54     int dom, pci_bus;
  55     unsigned slot;
  56     int drive_idx, type, bus;
  57     int success = 0;
  58     PCIDevice *dev;
  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     drive_idx = add_init_drive(opts);
  71     if (drive_idx < 0)
  72         return;
  73     if (drives_table[drive_idx].devaddr) {
  74         monitor_printf(mon, "Parameter addr not supported\n");
  75         return;
  76     }
  77     type = drives_table[drive_idx].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, drives_table[drive_idx].bdrv,
  84                         drives_table[drive_idx].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                        drives_table[drive_idx].bus,
  93                        drives_table[drive_idx].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     int type = -1, drive_idx = -1;
 103     char buf[128];
 104
 105     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 106         if (!strcmp(buf, "scsi"))
 107             type = IF_SCSI;
 108         else if (!strcmp(buf, "virtio")) {
 109             type = IF_VIRTIO;
 110         } else {
 111             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 112             return NULL;
 113         }
 114     } else {
 115         monitor_printf(mon, "no if= specified\n");
 116         return NULL;
 117     }
 118
 119     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 120         drive_idx = add_init_drive(opts);
 121         if (drive_idx < 0)
 122             return NULL;
 123         if (drives_table[drive_idx].devaddr) {
 124             monitor_printf(mon, "Parameter addr not supported\n");
 125             return NULL;
 126         }
 127     } else if (type == IF_VIRTIO) {
 128         monitor_printf(mon, "virtio requires a backing file/device.\n");
 129         return NULL;
 130     }
 131
 132     switch (type) {
 133     case IF_SCSI:
 134         dev = pci_create("lsi53c895a", devaddr);
 135         break;
 136     case IF_VIRTIO:
 137         dev = pci_create("virtio-blk-pci", devaddr);
 138         break;
 139     default:
 140         dev = NULL;
 141     }
 142     if (dev)
 143         qdev_init(&dev->qdev);
 144     return dev;
 145 }
 146
 147 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 148 static PCIDevice *qemu_pci_hot_assign_device(Monitor *mon,
 149                                              const char *devaddr,
 150                                              const char *opts)
 151 {
 152     AssignedDevInfo *adev;
 153     PCIDevice *ret;
 154
 155     adev = add_assigned_device(opts);
 156     if (adev == NULL) {
 157         monitor_printf(mon, "Error adding device; check syntax\n");
 158         return NULL;
 159     }
 160
 161     ret = init_assigned_device(adev, devaddr);
 162     if (ret == NULL) {
 163         monitor_printf(mon, "Failed to assign device\n");
 164         return NULL;
 165     }
 166
 167     monitor_printf(mon,
 168                    "Registered host PCI device %02x:%02x.%1x "
 169                    "(\"%s\") as guest device %s\n",
 170                    adev->bus, adev->dev, adev->func, adev->name, devaddr);
 171
 172     return ret;
 173 }
 174
 175 static void qemu_pci_hot_deassign_device(Monitor *mon, AssignedDevInfo *adev)
 176 {
 177     remove_assigned_device(adev);
 178
 179     monitor_printf(mon,
 180                    "Unregister host PCI device %02x:%02x.%1x "
 181                    "(\"%s\") from guest\n",
 182                    adev->bus, adev->dev, adev->func, adev->name);
 183 }
 184 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 185
 186 void pci_device_hot_add(Monitor *mon, const char *pci_addr, const char *type,
 187                         const char *opts)
 188 {
 189     PCIDevice *dev = NULL;
 190
 191     /* strip legacy tag */
 192     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 193         pci_addr += 9;
 194     }
 195
 196     if (!opts) {
 197         opts = "";
 198     }
 199
 200     if (!strcmp(pci_addr, "auto"))
 201         pci_addr = NULL;
 202
 203     if (strcmp(type, "nic") == 0)
 204         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 205     else if (strcmp(type, "storage") == 0)
 206         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 207 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 208     else if (strcmp(type, "host") == 0)
 209         dev = qemu_pci_hot_assign_device(mon, pci_addr, opts);
 210 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 211     else
 212         monitor_printf(mon, "invalid type: %s\n", type);
 213
 214     if (dev) {
 215         qemu_system_device_hot_add(pci_bus_num(dev->bus),
 216                                    PCI_SLOT(dev->devfn), 1);
 217         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 218                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 219                        PCI_FUNC(dev->devfn));
 220     } else
 221         monitor_printf(mon, "failed to add %s\n", opts);
 222 }
 223 #endif
 224
 225 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 226 {
 227     PCIDevice *d;
 228     int dom, bus;
 229     unsigned slot;
 230
 231     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 232         return;
 233     }
 234
 235     d = pci_find_device(bus, slot, 0);
 236     if (!d) {
 237         monitor_printf(mon, "slot %d empty\n", slot);
 238         return;
 239     }
 240
 241     qemu_system_device_hot_add(bus, slot, 0);
 242 }
 243
 244 static int pci_match_fn(void *dev_private, void *arg)
 245 {
 246     PCIDevice *dev = dev_private;
 247     PCIDevice *match = arg;
 248
 249     return (dev == match);
 250 }
 251
 252 /*
 253  * OS has executed _EJ0 method, we now can remove the device
 254  */
 255 void pci_device_hot_remove_success(int pcibus, int slot)
 256 {
 257     PCIDevice *d = pci_find_device(pcibus, slot, 0);
 258     int class_code;
 259 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 260     AssignedDevInfo *adev;
 261 #endif
 262
 263     if (!d) {
 264         monitor_printf(cur_mon, "invalid slot %d\n", slot);
 265         return;
 266     }
 267
 268 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 269     adev = get_assigned_device(pcibus, slot);
 270     if (adev) {
 271         qemu_pci_hot_deassign_device(cur_mon, adev);
 272         return;
 273     }
 274 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 275
 276     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 277
 278     switch(class_code) {
 279     case PCI_BASE_CLASS_STORAGE:
 280         destroy_bdrvs(pci_match_fn, d);
 281         break;
 282     case PCI_BASE_CLASS_NETWORK:
 283         destroy_nic(pci_match_fn, d);
 284         break;
 285     }
 286
 287     pci_unregister_device(d, 0);
 288 }
 289