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qemu/hw/pci-hotplug.c

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/*
* QEMU PCI hotplug support
*
* Copyright (c) 2004 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "boards.h"
#include "pci.h"
#include "net.h"
#include "sysemu.h"
#include "pc.h"
#include "monitor.h"
#include "block_int.h"
#include "scsi-disk.h"
#include "virtio-blk.h"
#if defined(TARGET_I386) || defined(TARGET_X86_64)
static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
const char *devaddr, const char *opts)
{
int ret;
ret = net_client_init(mon, "nic", opts);
if (ret < 0)
return NULL;
if (nd_table[ret].devaddr) {
monitor_printf(mon, "Parameter addr not supported\n");
return NULL;
}
if (nd_table[ret].model && !pci_nic_supported(nd_table[ret].model))
return NULL;
return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
}
void drive_hot_add(Monitor *mon, const QDict *qdict)
{
int dom, pci_bus;
unsigned slot;
int type, bus;
int success = 0;
PCIDevice *dev;
DriveInfo *dinfo;
const char *pci_addr = qdict_get_str(qdict, "pci_addr");
const char *opts = qdict_get_str(qdict, "opts");
BusState *scsibus;
if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
return;
}
dev = pci_find_device(pci_bus, slot, 0);
if (!dev) {
monitor_printf(mon, "no pci device with address %s\n", pci_addr);
return;
}
dinfo = add_init_drive(opts);
if (!dinfo)
return;
if (dinfo->devaddr) {
monitor_printf(mon, "Parameter addr not supported\n");
return;
}
type = dinfo->type;
bus = drive_get_max_bus (type);
switch (type) {
case IF_SCSI:
success = 1;
scsibus = QLIST_FIRST(&dev->qdev.child_bus);
scsi_bus_legacy_add_drive(DO_UPCAST(SCSIBus, qbus, scsibus),
dinfo, dinfo->unit);
break;
default:
monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
}
if (success)
monitor_printf(mon, "OK bus %d, unit %d\n",
dinfo->bus,
dinfo->unit);
return;
}
static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
const char *devaddr,
const char *opts)
{
PCIDevice *dev;
DriveInfo *dinfo = NULL;
int type = -1;
char buf[128];
if (get_param_value(buf, sizeof(buf), "if", opts)) {
if (!strcmp(buf, "scsi"))
type = IF_SCSI;
else if (!strcmp(buf, "virtio")) {
type = IF_VIRTIO;
} else {
monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
return NULL;
}
} else {
monitor_printf(mon, "no if= specified\n");
return NULL;
}
if (get_param_value(buf, sizeof(buf), "file", opts)) {
dinfo = add_init_drive(opts);
if (!dinfo)
return NULL;
if (dinfo->devaddr) {
monitor_printf(mon, "Parameter addr not supported\n");
return NULL;
}
} else {
dinfo = NULL;
}
switch (type) {
case IF_SCSI:
dev = pci_create("lsi53c895a", devaddr);
break;
case IF_VIRTIO:
if (!dinfo) {
monitor_printf(mon, "virtio requires a backing file/device.\n");
return NULL;
}
dev = pci_create("virtio-blk-pci", devaddr);
qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
break;
default:
dev = NULL;
}
if (dev)
qdev_init(&dev->qdev);
return dev;
}
void pci_device_hot_add(Monitor *mon, const QDict *qdict)
{
PCIDevice *dev = NULL;
const char *pci_addr = qdict_get_str(qdict, "pci_addr");
const char *type = qdict_get_str(qdict, "type");
const char *opts = qdict_get_try_str(qdict, "opts");
/* strip legacy tag */
if (!strncmp(pci_addr, "pci_addr=", 9)) {
pci_addr += 9;
}
if (!opts) {
opts = "";
}
if (!strcmp(pci_addr, "auto"))
pci_addr = NULL;
if (strcmp(type, "nic") == 0)
dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
else if (strcmp(type, "storage") == 0)
dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
else
monitor_printf(mon, "invalid type: %s\n", type);
if (dev) {
qemu_system_device_hot_add(pci_bus_num(dev->bus),
PCI_SLOT(dev->devfn), 1);
monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn));
} else
monitor_printf(mon, "failed to add %s\n", opts);
}
#endif
void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
{
PCIDevice *d;
int dom, bus;
unsigned slot;
if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
return;
}
d = pci_find_device(bus, slot, 0);
if (!d) {
monitor_printf(mon, "slot %d empty\n", slot);
return;
}
qemu_system_device_hot_add(bus, slot, 0);
}
void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
{
pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
}
static int pci_match_fn(void *dev_private, void *arg)
{
PCIDevice *dev = dev_private;
PCIDevice *match = arg;
return (dev == match);
}
/*
* OS has executed _EJ0 method, we now can remove the device
*/
void pci_device_hot_remove_success(int pcibus, int slot)
{
PCIDevice *d = pci_find_device(pcibus, slot, 0);
int class_code;
if (!d) {
monitor_printf(cur_mon, "invalid slot %d\n", slot);
return;
}
class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
switch(class_code) {
case PCI_BASE_CLASS_STORAGE:
destroy_bdrvs(pci_match_fn, d);
break;
case PCI_BASE_CLASS_NETWORK:
destroy_nic(pci_match_fn, d);
break;
}
qdev_free(&d->qdev);
}
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