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(mon, pci_addr, &dom, &pci_bus, &slot)) {
  60         return;
  61     }
  62
  63     dev = pci_find_device(pci_bus, slot, 0);
  64     if (!dev) {
  65         monitor_printf(mon, "no pci device with address %s\n", pci_addr);
  66         return;
  67     }
  68
  69     drive_idx = add_init_drive(opts);
  70     if (drive_idx < 0)
  71         return;
  72     if (drives_table[drive_idx].devaddr) {
  73         monitor_printf(mon, "Parameter addr not supported\n");
  74         return;
  75     }
  76     type = drives_table[drive_idx].type;
  77     bus = drive_get_max_bus (type);
  78
  79     switch (type) {
  80     case IF_SCSI:
  81         success = 1;
  82         lsi_scsi_attach(&dev->qdev, drives_table[drive_idx].bdrv,
  83                         drives_table[drive_idx].unit);
  84         break;
  85     default:
  86         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
  87     }
  88
  89     if (success)
  90         monitor_printf(mon, "OK bus %d, unit %d\n",
  91                        drives_table[drive_idx].bus,
  92                        drives_table[drive_idx].unit);
  93     return;
  94 }
  95
  96 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
  97                                            const char *devaddr,
  98                                            const char *opts)
  99 {
 100     PCIDevice *dev;
 101     int type = -1, drive_idx = -1;
 102     char buf[128];
 103
 104     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 105         if (!strcmp(buf, "scsi"))
 106             type = IF_SCSI;
 107         else if (!strcmp(buf, "virtio")) {
 108             type = IF_VIRTIO;
 109         } else {
 110             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 111             return NULL;
 112         }
 113     } else {
 114         monitor_printf(mon, "no if= specified\n");
 115         return NULL;
 116     }
 117
 118     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 119         drive_idx = add_init_drive(opts);
 120         if (drive_idx < 0)
 121             return NULL;
 122         if (drives_table[drive_idx].devaddr) {
 123             monitor_printf(mon, "Parameter addr not supported\n");
 124             return NULL;
 125         }
 126     } else if (type == IF_VIRTIO) {
 127         monitor_printf(mon, "virtio requires a backing file/device.\n");
 128         return NULL;
 129     }
 130
 131     switch (type) {
 132     case IF_SCSI:
 133         dev = pci_create("lsi53c895a", devaddr);
 134         break;
 135     case IF_VIRTIO:
 136         dev = pci_create("virtio-blk-pci", devaddr);
 137         break;
 138     default:
 139         dev = NULL;
 140     }
 141     if (dev)
 142         qdev_init(&dev->qdev);
 143     return dev;
 144 }
 145
 146 void pci_device_hot_add(Monitor *mon, const char *pci_addr, const char *type,
 147                         const char *opts)
 148 {
 149     PCIDevice *dev = NULL;
 150
 151     /* strip legacy tag */
 152     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 153         pci_addr += 9;
 154     }
 155
 156     if (!strcmp(pci_addr, "auto"))
 157         pci_addr = NULL;
 158
 159     if (strcmp(type, "nic") == 0)
 160         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 161     else if (strcmp(type, "storage") == 0)
 162         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 163     else
 164         monitor_printf(mon, "invalid type: %s\n", type);
 165
 166     if (dev) {
 167         qemu_system_device_hot_add(pci_bus_num(dev->bus),
 168                                    PCI_SLOT(dev->devfn), 1);
 169         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 170                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 171                        PCI_FUNC(dev->devfn));
 172     } else
 173         monitor_printf(mon, "failed to add %s\n", opts);
 174 }
 175 #endif
 176
 177 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 178 {
 179     PCIDevice *d;
 180     int dom, bus;
 181     unsigned slot;
 182
 183     if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
 184         return;
 185     }
 186
 187     d = pci_find_device(bus, slot, 0);
 188     if (!d) {
 189         monitor_printf(mon, "slot %d empty\n", slot);
 190         return;
 191     }
 192
 193     qemu_system_device_hot_add(bus, slot, 0);
 194 }
 195
 196 static int pci_match_fn(void *dev_private, void *arg)
 197 {
 198     PCIDevice *dev = dev_private;
 199     PCIDevice *match = arg;
 200
 201     return (dev == match);
 202 }
 203
 204 /*
 205  * OS has executed _EJ0 method, we now can remove the device
 206  */
 207 void pci_device_hot_remove_success(int pcibus, int slot)
 208 {
 209     PCIDevice *d = pci_find_device(pcibus, slot, 0);
 210     int class_code;
 211
 212     if (!d) {
 213         monitor_printf(cur_mon, "invalid slot %d\n", slot);
 214         return;
 215     }
 216
 217     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 218
 219     switch(class_code) {
 220     case PCI_BASE_CLASS_STORAGE:
 221         destroy_bdrvs(pci_match_fn, d);
 222         break;
 223     case PCI_BASE_CLASS_NETWORK:
 224         destroy_nic(pci_match_fn, d);
 225         break;
 226     }
 227
 228     pci_unregister_device(d);
 229 }
 230