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, PCIBus *pci_bus,
  38                                        const char *opts)
  39 {
  40     int ret;
  41
  42     ret = net_client_init(mon, "nic", opts);
  43     if (ret < 0)
  44         return NULL;
  45     return pci_nic_init(pci_bus, &nd_table[ret], -1, "rtl8139");
  46 }
  47
  48 void drive_hot_add(Monitor *mon, const char *pci_addr, const char *opts)
  49 {
  50     int dom, pci_bus;
  51     unsigned slot;
  52     int drive_idx, type, bus;
  53     int success = 0;
  54     PCIDevice *dev;
  55
  56     if (pci_read_devaddr(pci_addr, &dom, &pci_bus, &slot)) {
  57         monitor_printf(mon, "Invalid pci address\n");
  58         return;
  59     }
  60
  61     dev = pci_find_device(pci_bus, slot, 0);
  62     if (!dev) {
  63         monitor_printf(mon, "no pci device with address %s\n", pci_addr);
  64         return;
  65     }
  66
  67     drive_idx = add_init_drive(opts);
  68     if (drive_idx < 0)
  69         return;
  70     type = drives_table[drive_idx].type;
  71     bus = drive_get_max_bus (type);
  72
  73     switch (type) {
  74     case IF_SCSI:
  75         success = 1;
  76         lsi_scsi_attach(&dev->qdev, drives_table[drive_idx].bdrv,
  77                         drives_table[drive_idx].unit);
  78         break;
  79     default:
  80         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
  81     }
  82
  83     if (success)
  84         monitor_printf(mon, "OK bus %d, unit %d\n",
  85                        drives_table[drive_idx].bus,
  86                        drives_table[drive_idx].unit);
  87     return;
  88 }
  89
  90 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon, PCIBus *pci_bus,
  91                                            const char *opts)
  92 {
  93     void *opaque = NULL;
  94     int type = -1, drive_idx = -1;
  95     char buf[128];
  96
  97     if (get_param_value(buf, sizeof(buf), "if", opts)) {
  98         if (!strcmp(buf, "scsi"))
  99             type = IF_SCSI;
 100         else if (!strcmp(buf, "virtio")) {
 101             type = IF_VIRTIO;
 102         } else {
 103             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 104             goto out;
 105         }
 106     } else {
 107         monitor_printf(mon, "no if= specified\n");
 108         goto out;
 109     }
 110
 111     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 112         drive_idx = add_init_drive(opts);
 113         if (drive_idx < 0)
 114             goto out;
 115     } else if (type == IF_VIRTIO) {
 116         monitor_printf(mon, "virtio requires a backing file/device.\n");
 117         goto out;
 118     }
 119
 120     switch (type) {
 121     case IF_SCSI:
 122         opaque = pci_create_simple(pci_bus, -1, "lsi53c895a");
 123         break;
 124     case IF_VIRTIO:
 125         opaque = pci_create_simple(pci_bus, -1, "virtio-blk-pci");
 126         break;
 127     }
 128
 129 out:
 130     return opaque;
 131 }
 132
 133 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 134 static PCIDevice *qemu_pci_hot_assign_device(Monitor *mon,
 135                                              PCIBus *pci_bus, const char *opts)
 136 {
 137     AssignedDevInfo *adev;
 138     PCIDevice *ret;
 139
 140     adev = add_assigned_device(opts);
 141     if (adev == NULL) {
 142         monitor_printf(mon, "Error adding device; check syntax\n");
 143         return NULL;
 144     }
 145
 146     ret = init_assigned_device(adev, pci_bus);
 147     if (ret == NULL) {
 148         monitor_printf(mon, "Failed to assign device\n");
 149         return NULL;
 150     }
 151
 152     monitor_printf(mon,
 153                    "Registered host PCI device %02x:%02x.%1x "
 154                    "(\"%s\") as guest device %02x:%02x.%1x\n",
 155                    adev->bus, adev->dev, adev->func, adev->name,
 156                    pci_bus_num(pci_bus), (ret->devfn >> 3) & 0x1f,
 157                    adev->func);
 158
 159     return ret;
 160 }
 161
 162 static void qemu_pci_hot_deassign_device(Monitor *mon, AssignedDevInfo *adev)
 163 {
 164     remove_assigned_device(adev);
 165
 166     monitor_printf(mon,
 167                    "Unregister host PCI device %02x:%02x.%1x "
 168                    "(\"%s\") from guest\n",
 169                    adev->bus, adev->dev, adev->func, adev->name);
 170 }
 171 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 172
 173 void pci_device_hot_add(Monitor *mon, const char *pci_addr, const char *type,
 174                         const char *opts)
 175 {
 176     PCIDevice *dev = NULL;
 177     PCIBus *pci_bus;
 178     int dom, bus;
 179     unsigned slot;
 180
 181     if (pci_assign_devaddr(pci_addr, &dom, &bus, &slot)) {
 182         monitor_printf(mon, "Invalid pci address\n");
 183         return;
 184     }
 185
 186     pci_bus = pci_find_bus(bus);
 187     if (!pci_bus) {
 188         monitor_printf(mon, "Can't find pci_bus %d\n", bus);
 189         return;
 190     }
 191
 192     if (strcmp(type, "nic") == 0)
 193         dev = qemu_pci_hot_add_nic(mon, pci_bus, opts);
 194     else if (strcmp(type, "storage") == 0)
 195         dev = qemu_pci_hot_add_storage(mon, pci_bus, opts);
 196 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 197     else if (strcmp(type, "host") == 0)
 198         dev = qemu_pci_hot_assign_device(mon, pci_bus, opts);
 199 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 200     else
 201         monitor_printf(mon, "invalid type: %s\n", type);
 202
 203     if (dev) {
 204         qemu_system_device_hot_add(bus, PCI_SLOT(dev->devfn), 1);
 205         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 206                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 207                        PCI_FUNC(dev->devfn));
 208     } else
 209         monitor_printf(mon, "failed to add %s\n", opts);
 210 }
 211 #endif
 212
 213 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 214 {
 215     PCIDevice *d;
 216     int dom, bus;
 217     unsigned slot;
 218
 219     if (pci_read_devaddr(pci_addr, &dom, &bus, &slot)) {
 220         monitor_printf(mon, "Invalid pci address\n");
 221         return;
 222     }
 223
 224     d = pci_find_device(bus, slot, 0);
 225     if (!d) {
 226         monitor_printf(mon, "slot %d empty\n", slot);
 227         return;
 228     }
 229
 230     qemu_system_device_hot_add(bus, slot, 0);
 231 }
 232
 233 static int pci_match_fn(void *dev_private, void *arg)
 234 {
 235     PCIDevice *dev = dev_private;
 236     PCIDevice *match = arg;
 237
 238     return (dev == match);
 239 }
 240
 241 /*
 242  * OS has executed _EJ0 method, we now can remove the device
 243  */
 244 void pci_device_hot_remove_success(int pcibus, int slot)
 245 {
 246     PCIDevice *d = pci_find_device(pcibus, slot, 0);
 247     int class_code;
 248     AssignedDevInfo *adev;
 249
 250     if (!d) {
 251         monitor_printf(cur_mon, "invalid slot %d\n", slot);
 252         return;
 253     }
 254
 255 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 256     adev = get_assigned_device(pcibus, slot);
 257     if (adev) {
 258         qemu_pci_hot_deassign_device(cur_mon, adev);
 259         return;
 260     }
 261 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 262
 263     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 264
 265     switch(class_code) {
 266     case PCI_BASE_CLASS_STORAGE:
 267         destroy_bdrvs(pci_match_fn, d);
 268         break;
 269     case PCI_BASE_CLASS_NETWORK:
 270         destroy_nic(pci_match_fn, d);
 271         break;
 272     }
 273
 274     pci_unregister_device(d, 0);
 275 }
 276