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 "scsi-disk.h"
  34 #include "virtio-blk.h"
  35 #include "qemu-config.h"
  36
  37 #if defined(TARGET_I386)
  38 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
  39                                        const char *devaddr,
  40                                        const char *opts_str)
  41 {
  42     QemuOpts *opts;
  43     int ret;
  44
  45     opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
  46     if (!opts) {
  47         monitor_printf(mon, "parsing network options '%s' failed\n",
  48                        opts_str ? opts_str : "");
  49         return NULL;
  50     }
  51
  52     qemu_opt_set(opts, "type", "nic");
  53
  54     ret = net_client_init(mon, opts, 0);
  55     if (ret < 0)
  56         return NULL;
  57     if (nd_table[ret].devaddr) {
  58         monitor_printf(mon, "Parameter addr not supported\n");
  59         return NULL;
  60     }
  61     return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
  62 }
  63
  64 void drive_hot_add(Monitor *mon, const QDict *qdict)
  65 {
  66     int dom, pci_bus;
  67     unsigned slot;
  68     int type, bus;
  69     PCIDevice *dev;
  70     DriveInfo *dinfo = NULL;
  71     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
  72     const char *opts = qdict_get_str(qdict, "opts");
  73     BusState *scsibus;
  74
  75     dinfo = add_init_drive(opts);
  76     if (!dinfo)
  77         goto err;
  78     if (dinfo->devaddr) {
  79         monitor_printf(mon, "Parameter addr not supported\n");
  80         goto err;
  81     }
  82     type = dinfo->type;
  83     bus = drive_get_max_bus (type);
  84
  85     switch (type) {
  86     case IF_SCSI:
  87         if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
  88             goto err;
  89         }
  90         dev = pci_find_device(pci_bus, slot, 0);
  91         if (!dev) {
  92             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
  93             goto err;
  94         }
  95         scsibus = QLIST_FIRST(&dev->qdev.child_bus);
  96         scsi_bus_legacy_add_drive(DO_UPCAST(SCSIBus, qbus, scsibus),
  97                                   dinfo, dinfo->unit);
  98         monitor_printf(mon, "OK bus %d, unit %d\n",
  99                        dinfo->bus,
 100                        dinfo->unit);
 101         break;
 102     case IF_NONE:
 103         monitor_printf(mon, "OK\n");
 104         break;
 105     default:
 106         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
 107         goto err;
 108     }
 109     return;
 110
 111 err:
 112     if (dinfo)
 113         drive_uninit(dinfo);
 114     return;
 115 }
 116
 117 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
 118                                            const char *devaddr,
 119                                            const char *opts)
 120 {
 121     PCIDevice *dev;
 122     DriveInfo *dinfo = NULL;
 123     int type = -1;
 124     char buf[128];
 125     PCIBus *bus;
 126     int devfn;
 127
 128     if (get_param_value(buf, sizeof(buf), "if", opts)) {
 129         if (!strcmp(buf, "scsi"))
 130             type = IF_SCSI;
 131         else if (!strcmp(buf, "virtio")) {
 132             type = IF_VIRTIO;
 133         } else {
 134             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 135             return NULL;
 136         }
 137     } else {
 138         monitor_printf(mon, "no if= specified\n");
 139         return NULL;
 140     }
 141
 142     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 143         dinfo = add_init_drive(opts);
 144         if (!dinfo)
 145             return NULL;
 146         if (dinfo->devaddr) {
 147             monitor_printf(mon, "Parameter addr not supported\n");
 148             return NULL;
 149         }
 150     } else {
 151         dinfo = NULL;
 152     }
 153
 154     bus = pci_get_bus_devfn(&devfn, devaddr);
 155     if (!bus) {
 156         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
 157         return NULL;
 158     }
 159
 160     switch (type) {
 161     case IF_SCSI:
 162         dev = pci_create(bus, devfn, "lsi53c895a");
 163         break;
 164     case IF_VIRTIO:
 165         if (!dinfo) {
 166             monitor_printf(mon, "virtio requires a backing file/device.\n");
 167             return NULL;
 168         }
 169         dev = pci_create(bus, devfn, "virtio-blk-pci");
 170         qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
 171         break;
 172     default:
 173         dev = NULL;
 174     }
 175     if (!dev || qdev_init(&dev->qdev) < 0)
 176         return NULL;
 177     return dev;
 178 }
 179
 180 void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 181 {
 182     PCIDevice *dev = NULL;
 183     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 184     const char *type = qdict_get_str(qdict, "type");
 185     const char *opts = qdict_get_try_str(qdict, "opts");
 186
 187     /* strip legacy tag */
 188     if (!strncmp(pci_addr, "pci_addr=", 9)) {
 189         pci_addr += 9;
 190     }
 191
 192     if (!opts) {
 193         opts = "";
 194     }
 195
 196     if (!strcmp(pci_addr, "auto"))
 197         pci_addr = NULL;
 198
 199     if (strcmp(type, "nic") == 0)
 200         dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
 201     else if (strcmp(type, "storage") == 0)
 202         dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
 203     else
 204         monitor_printf(mon, "invalid type: %s\n", type);
 205
 206     if (dev) {
 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(mon, pci_addr, &dom, &bus, &slot)) {
 222         return;
 223     }
 224
 225     d = pci_find_device(bus, slot, 0);
 226     if (!d) {
 227         monitor_printf(mon, "slot %d empty\n", slot);
 228         return;
 229     }
 230     qdev_unplug(&d->qdev);
 231 }
 232
 233 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
 234 {
 235     pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
 236 }
 237
 238 static int pci_match_fn(void *dev_private, void *arg)
 239 {
 240     PCIDevice *dev = dev_private;
 241     PCIDevice *match = arg;
 242
 243     return (dev == match);
 244 }
 245
 246 /*
 247  * OS has executed _EJ0 method, we now can remove the device
 248  */
 249 void pci_device_hot_remove_success(PCIDevice *d)
 250 {
 251     int class_code;
 252
 253     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 254
 255     switch(class_code) {
 256     case PCI_BASE_CLASS_NETWORK:
 257         destroy_nic(pci_match_fn, d);
 258         break;
 259     }
 260 }
 261