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