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
  35 #if defined(TARGET_I386) || defined(TARGET_X86_64)
  36 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
  37                                        const char *devaddr, const char *opts)
  38 {
  39     int ret;
  40
  41     ret = net_client_init(mon, "nic", opts);
  42     if (ret < 0)
  43         return NULL;
  44     if (nd_table[ret].devaddr) {
  45         monitor_printf(mon, "Parameter addr not supported\n");
  46         return NULL;
  47     }
  48     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  49 }
  50
  51 void drive_hot_add(Monitor *mon, const char *pci_addr, const char *opts)
  52 {
  53     int dom, pci_bus;
  54     unsigned slot;
  55     int drive_idx, type, bus;
  56     int success = 0;
  57     PCIDevice *dev;
  58
  59     if (pci_read_devaddr(pci_addr, &dom, &pci_bus, &slot)) {
  60         monitor_printf(mon, "Invalid pci address\n");
  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 void pci_device_hot_add(Monitor *mon, const char *pci_addr, const char *type,
 148                         const char *opts)
 149 {
 150     PCIDevice *dev = NULL;
 151     const char *devaddr = NULL;
 152     char buf[32];
 153
 154     if (!get_param_value(buf, sizeof(buf), "pci_addr", pci_addr)) {
 155         monitor_printf(mon, "Invalid pci address\n");
 156         return;
 157     }
 158
 159     if (strcmp(buf, "auto"))
 160         devaddr = buf;
 161
 162     if (strcmp(type, "nic") == 0)
 163         dev = qemu_pci_hot_add_nic(mon, devaddr, opts);
 164     else if (strcmp(type, "storage") == 0)
 165         dev = qemu_pci_hot_add_storage(mon, devaddr, opts);
 166     else
 167         monitor_printf(mon, "invalid type: %s\n", type);
 168
 169     if (dev) {
 170         qemu_system_device_hot_add(pci_bus_num(dev->bus),
 171                                    PCI_SLOT(dev->devfn), 1);
 172         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 173                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 174                        PCI_FUNC(dev->devfn));
 175     } else
 176         monitor_printf(mon, "failed to add %s\n", opts);
 177 }
 178 #endif
 179
 180 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 181 {
 182     PCIDevice *d;
 183     int dom, bus;
 184     unsigned slot;
 185
 186     if (pci_read_devaddr(pci_addr, &dom, &bus, &slot)) {
 187         monitor_printf(mon, "Invalid pci address\n");
 188         return;
 189     }
 190
 191     d = pci_find_device(bus, slot, 0);
 192     if (!d) {
 193         monitor_printf(mon, "slot %d empty\n", slot);
 194         return;
 195     }
 196
 197     qemu_system_device_hot_add(bus, slot, 0);
 198 }
 199
 200 static int pci_match_fn(void *dev_private, void *arg)
 201 {
 202     PCIDevice *dev = dev_private;
 203     PCIDevice *match = arg;
 204
 205     return (dev == match);
 206 }
 207
 208 /*
 209  * OS has executed _EJ0 method, we now can remove the device
 210  */
 211 void pci_device_hot_remove_success(int pcibus, int slot)
 212 {
 213     PCIDevice *d = pci_find_device(pcibus, slot, 0);
 214     int class_code;
 215
 216     if (!d) {
 217         monitor_printf(cur_mon, "invalid slot %d\n", slot);
 218         return;
 219     }
 220
 221     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 222
 223     switch(class_code) {
 224     case PCI_BASE_CLASS_STORAGE:
 225         destroy_bdrvs(pci_match_fn, d);
 226         break;
 227     case PCI_BASE_CLASS_NETWORK:
 228         destroy_nic(pci_match_fn, d);
 229         break;
 230     }
 231
 232     pci_unregister_device(d);
 233 }
 234