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(PCIBus *pci_bus, const char *opts)
  37 {
  38     int ret;
  39
  40     ret = net_client_init("nic", opts);
  41     if (ret < 0)
  42         return NULL;
  43     return pci_nic_init(pci_bus, &nd_table[ret], -1, "rtl8139");
  44 }
  45
  46 void drive_hot_add(Monitor *mon, const char *pci_addr, const char *opts)
  47 {
  48     int dom, pci_bus;
  49     unsigned slot;
  50     int drive_idx, type, bus;
  51     int success = 0;
  52     PCIDevice *dev;
  53
  54     if (pci_read_devaddr(pci_addr, &dom, &pci_bus, &slot)) {
  55         monitor_printf(mon, "Invalid pci address\n");
  56         return;
  57     }
  58
  59     dev = pci_find_device(pci_bus, slot, 0);
  60     if (!dev) {
  61         monitor_printf(mon, "no pci device with address %s\n", pci_addr);
  62         return;
  63     }
  64
  65     drive_idx = add_init_drive(opts);
  66     if (drive_idx < 0)
  67         return;
  68     type = drives_table[drive_idx].type;
  69     bus = drive_get_max_bus (type);
  70
  71     switch (type) {
  72     case IF_SCSI:
  73         success = 1;
  74         lsi_scsi_attach(&dev->qdev, drives_table[drive_idx].bdrv,
  75                         drives_table[drive_idx].unit);
  76         break;
  77     default:
  78         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
  79     }
  80
  81     if (success)
  82         monitor_printf(mon, "OK bus %d, unit %d\n",
  83                        drives_table[drive_idx].bus,
  84                        drives_table[drive_idx].unit);
  85     return;
  86 }
  87
  88 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon, PCIBus *pci_bus,
  89                                            const char *opts)
  90 {
  91     void *opaque = NULL;
  92     int type = -1, drive_idx = -1;
  93     char buf[128];
  94
  95     if (get_param_value(buf, sizeof(buf), "if", opts)) {
  96         if (!strcmp(buf, "scsi"))
  97             type = IF_SCSI;
  98         else if (!strcmp(buf, "virtio")) {
  99             type = IF_VIRTIO;
 100         } else {
 101             monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
 102             goto out;
 103         }
 104     } else {
 105         monitor_printf(mon, "no if= specified\n");
 106         goto out;
 107     }
 108
 109     if (get_param_value(buf, sizeof(buf), "file", opts)) {
 110         drive_idx = add_init_drive(opts);
 111         if (drive_idx < 0)
 112             goto out;
 113     } else if (type == IF_VIRTIO) {
 114         monitor_printf(mon, "virtio requires a backing file/device.\n");
 115         goto out;
 116     }
 117
 118     switch (type) {
 119     case IF_SCSI:
 120         opaque = pci_create_simple(pci_bus, -1, "lsi53c895a");
 121         break;
 122     case IF_VIRTIO:
 123         opaque = pci_create_simple(pci_bus, -1, "virtio-blk-pci");
 124         qdev_init(opaque);
 125         break;
 126     }
 127
 128 out:
 129     return opaque;
 130 }
 131
 132 void pci_device_hot_add(Monitor *mon, const char *pci_addr, const char *type,
 133                         const char *opts)
 134 {
 135     PCIDevice *dev = NULL;
 136     PCIBus *pci_bus;
 137     int dom, bus;
 138     unsigned slot;
 139
 140     if (pci_assign_devaddr(pci_addr, &dom, &bus, &slot)) {
 141         monitor_printf(mon, "Invalid pci address\n");
 142         return;
 143     }
 144
 145     pci_bus = pci_find_bus(bus);
 146     if (!pci_bus) {
 147         monitor_printf(mon, "Can't find pci_bus %d\n", bus);
 148         return;
 149     }
 150
 151     if (strcmp(type, "nic") == 0)
 152         dev = qemu_pci_hot_add_nic(pci_bus, opts);
 153     else if (strcmp(type, "storage") == 0)
 154         dev = qemu_pci_hot_add_storage(mon, pci_bus, opts);
 155     else
 156         monitor_printf(mon, "invalid type: %s\n", type);
 157
 158     if (dev) {
 159         qemu_system_device_hot_add(bus, PCI_SLOT(dev->devfn), 1);
 160         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
 161                        0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
 162                        PCI_FUNC(dev->devfn));
 163     } else
 164         monitor_printf(mon, "failed to add %s\n", opts);
 165 }
 166 #endif
 167
 168 void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 169 {
 170     PCIDevice *d;
 171     int dom, bus;
 172     unsigned slot;
 173
 174     if (pci_read_devaddr(pci_addr, &dom, &bus, &slot)) {
 175         monitor_printf(mon, "Invalid pci address\n");
 176         return;
 177     }
 178
 179     d = pci_find_device(bus, slot, 0);
 180     if (!d) {
 181         monitor_printf(mon, "slot %d empty\n", slot);
 182         return;
 183     }
 184
 185     qemu_system_device_hot_add(bus, slot, 0);
 186 }
 187
 188 static int pci_match_fn(void *dev_private, void *arg)
 189 {
 190     PCIDevice *dev = dev_private;
 191     PCIDevice *match = arg;
 192
 193     return (dev == match);
 194 }
 195
 196 /*
 197  * OS has executed _EJ0 method, we now can remove the device
 198  */
 199 void pci_device_hot_remove_success(int pcibus, int slot)
 200 {
 201     PCIDevice *d = pci_find_device(pcibus, slot, 0);
 202     int class_code;
 203
 204     if (!d) {
 205         monitor_printf(cur_mon, "invalid slot %d\n", slot);
 206         return;
 207     }
 208
 209     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 210
 211     switch(class_code) {
 212     case PCI_BASE_CLASS_STORAGE:
 213         destroy_bdrvs(pci_match_fn, d);
 214         break;
 215     case PCI_BASE_CLASS_NETWORK:
 216         destroy_nic(pci_match_fn, d);
 217         break;
 218     }
 219
 220     pci_unregister_device(d);
 221 }
 222