qemu/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(PCIBus *pci_bus, const char *opts)
  38 {
  39     int ret;
  40
  41     ret = net_client_init ("nic", opts);
  42     if (ret < 0 || !nd_table[ret].model)
  43         return NULL;
  44     return pci_nic_init (pci_bus, &nd_table[ret], -1, "rtl8139");
  45 }
  46
  47 void drive_hot_add(Monitor *mon, const char *pci_addr, const char *opts)
  48 {
  49     int dom, pci_bus;
  50     unsigned slot;
  51     int drive_idx, type, bus;
  52     int success = 0;
  53     PCIDevice *dev;
  54
  55     if (pci_read_devaddr(pci_addr, &dom, &pci_bus, &slot)) {
  56         monitor_printf(mon, "Invalid pci address\n");
  57         return;
  58     }
  59
  60     dev = pci_find_device(pci_bus, slot, 0);
  61     if (!dev) {
  62         monitor_printf(mon, "no pci device with address %s\n", pci_addr);
  63         return;
  64     }
  65
  66     drive_idx = add_init_drive(opts);
  67     if (drive_idx < 0)
  68         return;
  69     type = drives_table[drive_idx].type;
  70     bus = drive_get_max_bus (type);
  71
  72     switch (type) {
  73     case IF_SCSI:
  74         success = 1;
  75         lsi_scsi_attach (dev, drives_table[drive_idx].bdrv,
  76                          drives_table[drive_idx].unit);
  77         break;
  78     default:
  79         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
  80     }
  81
  82     if (success)
  83         monitor_printf(mon, "OK bus %d, unit %d\n",
  84                        drives_table[drive_idx].bus,
  85                        drives_table[drive_idx].unit);
  86     return;
  87 }
  88
  89 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon, PCIBus *pci_bus,
  90                                            const char *opts)
  91 {
  92     void *opaque = NULL;
  93     int type = -1, drive_idx = -1;
  94     char buf[128];
  95
  96     if (get_param_value(buf, sizeof(buf), "if", opts)) {
  97         if (!strcmp(buf, "scsi"))
  98             type = IF_SCSI;
  99         else if (!strcmp(buf, "virtio")) {
 100             type = IF_VIRTIO;
 101         } else {
 102             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 103             goto out;
 104         }
 105     } else {
 106         monitor_printf(mon, "no if= specified\n");
 107         goto out;
 108     }
 109
 110     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 111         drive_idx = add_init_drive(opts);
 112         if (drive_idx < 0)
 113             goto out;
 114     } else if (type == IF_VIRTIO) {
 115         monitor_printf(mon, "virtio requires a backing file/device.\n");
 116         goto out;
 117     }
 118
 119     switch (type) {
 120     case IF_SCSI:
 121         opaque = lsi_scsi_init (pci_bus, -1);
 122         if (opaque && drive_idx >= 0)
 123             lsi_scsi_attach (opaque, drives_table[drive_idx].bdrv,
 124                              drives_table[drive_idx].unit);
 125         break;
 126     case IF_VIRTIO:
 127         opaque = virtio_blk_init (pci_bus, drives_table[drive_idx].bdrv);
 128         break;
 129     }
 130
 131 out:
 132     return opaque;
 133 }
 134
 135 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 136 static PCIDevice *qemu_pci_hot_assign_device(Monitor *mon,
 137                                              PCIBus *pci_bus, const char *opts)
 138 {
 139     AssignedDevInfo *adev;
 140     PCIDevice *ret;
 141
 142     adev = add_assigned_device(opts);
 143     if (adev == NULL) {
 144         monitor_printf(mon, "Error adding device; check syntax\n");
 145         return NULL;
 146     }
 147
 148     ret = init_assigned_device(adev, pci_bus);
 149     if (ret == NULL) {
 150         monitor_printf(mon, "Failed to assign device\n");
 151         return NULL;
 152     }
 153
 154     monitor_printf(mon,
 155                    "Registered host PCI device %02x:%02x.%1x "
 156                    "(\"%s\") as guest device %02x:%02x.%1x\n",
 157                    adev->bus, adev->dev, adev->func, adev->name,
 158                    pci_bus_num(pci_bus), (ret->devfn >> 3) & 0x1f,
 159                    adev->func);
 160
 161     return ret;
 162 }
 163
 164 static void qemu_pci_hot_deassign_device(Monitor *mon, AssignedDevInfo *adev)
 165 {
 166     remove_assigned_device(adev);
 167
 168     monitor_printf(mon,
 169                    "Unregister host PCI device %02x:%02x.%1x "
 170                    "(\"%s\") from guest\n",
 171                    adev->bus, adev->dev, adev->func, adev->name);
 172 }
 173 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 174
 175 void pci_device_hot_add(Monitor *mon, const char *pci_addr, const char *type,
 176                         const char *opts)
 177 {
 178     PCIDevice *dev = NULL;
 179     PCIBus *pci_bus;
 180     int dom, bus;
 181     unsigned slot;
 182
 183     if (pci_assign_devaddr(pci_addr, &dom, &bus, &slot)) {
 184         monitor_printf(mon, "Invalid pci address\n");
 185         return;
 186     }
 187
 188     pci_bus = pci_find_bus(bus);
 189     if (!pci_bus) {
 190         monitor_printf(mon, "Can't find pci_bus %d\n", bus);
 191         return;
 192     }
 193
 194     if (strcmp(type, "nic") == 0)
 195         dev = qemu_pci_hot_add_nic(pci_bus, opts);
 196     else if (strcmp(type, "storage") == 0)
 197         dev = qemu_pci_hot_add_storage(mon, pci_bus, opts);
 198 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 199     else if (strcmp(type, "host") == 0)
 200         dev = qemu_pci_hot_assign_device(mon, pci_bus, opts);
 201 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 202     else
 203         monitor_printf(mon, "invalid type: %s\n", type);
 204
 205     if (dev) {
 206         qemu_system_device_hot_add(bus, PCI_SLOT(dev->devfn), 1);
 207         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 208                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 209                        PCI_FUNC(dev->devfn));
 210     } else
 211         monitor_printf(mon, "failed to add %s\n", opts);
 212 }
 213 #endif
 214
 215 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 216 {
 217     PCIDevice *d;
 218     int dom, bus;
 219     unsigned slot;
 220
 221     if (pci_read_devaddr(pci_addr, &dom, &bus, &slot)) {
 222         monitor_printf(mon, "Invalid pci address\n");
 223         return;
 224     }
 225
 226     d = pci_find_device(bus, slot, 0);
 227     if (!d) {
 228         monitor_printf(mon, "slot %d empty\n", slot);
 229         return;
 230     }
 231
 232     qemu_system_device_hot_add(bus, slot, 0);
 233 }
 234
 235 static int pci_match_fn(void *dev_private, void *arg)
 236 {
 237     PCIDevice *dev = dev_private;
 238     PCIDevice *match = arg;
 239
 240     return (dev == match);
 241 }
 242
 243 /*
 244  * OS has executed _EJ0 method, we now can remove the device
 245  */
 246 void pci_device_hot_remove_success(int pcibus, int slot)
 247 {
 248     PCIDevice *d = pci_find_device(pcibus, slot, 0);
 249     int class_code;
 250     AssignedDevInfo *adev;
 251
 252     if (!d) {
 253         monitor_printf(cur_mon, "invalid slot %d\n", slot);
 254         return;
 255     }
 256
 257 #ifdef USE_KVM_DEVICE_ASSIGNMENT
 258     adev = get_assigned_device(pcibus, slot);
 259     if (adev) {
 260         qemu_pci_hot_deassign_device(cur_mon, adev);
 261         return;
 262     }
 263 #endif /* USE_KVM_DEVICE_ASSIGNMENT */
 264
 265     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 266
 267     switch(class_code) {
 268     case PCI_BASE_CLASS_STORAGE:
 269         destroy_bdrvs(pci_match_fn, d);
 270         break;
 271     case PCI_BASE_CLASS_NETWORK:
 272         destroy_nic(pci_match_fn, d);
 273         break;
 274     }
 275
 276     pci_unregister_device(d);
 277 }
 278