/*
* 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.h"
#include "virtio-blk.h"
#include "qemu-config.h"
#include "qemu-objects.h"
#if defined(TARGET_I386)
static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
const char *devaddr,
const char *opts_str)
{
QemuOpts *opts;
PCIBus *bus;
int ret, devfn;
bus = pci_get_bus_devfn(&devfn, devaddr);
if (!bus) {
monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
return NULL;
}
if (!((BusState*)bus)->allow_hotplug) {
monitor_printf(mon, "PCI bus doesn't support hotplug\n");
return NULL;
}
opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
if (!opts) {
monitor_printf(mon, "parsing network options '%s' failed\n",
opts_str ? opts_str : "");
return NULL;
}
qemu_opt_set(opts, "type", "nic");
ret = net_client_init(mon, opts, 0);
if (ret < 0)
return NULL;
if (nd_table[ret].devaddr) {
monitor_printf(mon, "Parameter addr not supported\n");
return NULL;
}
return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
}
static int scsi_hot_add(DeviceState *adapter, DriveInfo *dinfo, int printinfo)
{
SCSIBus *scsibus;
SCSIDevice *scsidev;
scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
qemu_error("Device is not a SCSI adapter\n");
return -1;
}
/*
* drive_init() tries to find a default for dinfo->unit. Doesn't
* work at all for hotplug though as we assign the device to a
* specific bus instead of the first bus with spare scsi ids.
*
* Ditch the calculated value and reload from option string (if
* specified).
*/
dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo, dinfo->unit);
dinfo->unit = scsidev->id;
if (printinfo)
qemu_error("OK bus %d, unit %d\n", scsibus->busnr, scsidev->id);
return 0;
}
void drive_hot_add(Monitor *mon, const QDict *qdict)
{
int dom, pci_bus;
unsigned slot;
int type, bus;
PCIDevice *dev;
DriveInfo *dinfo = NULL;
const char *pci_addr = qdict_get_str(qdict, "pci_addr");
const char *opts = qdict_get_str(qdict, "opts");
dinfo = add_init_drive(opts);
if (!dinfo)
goto err;
if (dinfo->devaddr) {
monitor_printf(mon, "Parameter addr not supported\n");
goto err;
}
type = dinfo->type;
bus = drive_get_max_bus (type);
switch (type) {
case IF_SCSI:
if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
goto err;
}
dev = pci_find_device(pci_find_root_bus(0), pci_bus, slot, 0);
if (!dev) {
monitor_printf(mon, "no pci device with address %s\n", pci_addr);
goto err;
}
if (scsi_hot_add(&dev->qdev, dinfo, 1) != 0) {
goto err;
}
break;
case IF_NONE:
monitor_printf(mon, "OK\n");
break;
default:
monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
goto err;
}
return;
err:
if (dinfo)
drive_uninit(dinfo);
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];
PCIBus *bus;
int devfn;
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;
}
bus = pci_get_bus_devfn(&devfn, devaddr);
if (!bus) {
monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
return NULL;
}
if (!((BusState*)bus)->allow_hotplug) {
monitor_printf(mon, "PCI bus doesn't support hotplug\n");
return NULL;
}
switch (type) {
case IF_SCSI:
dev = pci_create(bus, devfn, "lsi53c895a");
if (qdev_init(&dev->qdev) < 0)
dev = NULL;
if (dev && dinfo) {
if (scsi_hot_add(&dev->qdev, dinfo, 0) != 0) {
qdev_unplug(&dev->qdev);
dev = NULL;
}
}
break;
case IF_VIRTIO:
if (!dinfo) {
monitor_printf(mon, "virtio requires a backing file/device.\n");
return NULL;
}
dev = pci_create(bus, devfn, "virtio-blk-pci");
qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
if (qdev_init(&dev->qdev) < 0)
dev = NULL;
break;
default:
dev = NULL;
}
return dev;
}
void pci_device_hot_add_print(Monitor *mon, const QObject *data)
{
QDict *qdict;
assert(qobject_type(data) == QTYPE_QDICT);
qdict = qobject_to_qdict(data);
monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
(int) qdict_get_int(qdict, "domain"),
(int) qdict_get_int(qdict, "bus"),
(int) qdict_get_int(qdict, "slot"),
(int) qdict_get_int(qdict, "function"));
}
/**
* pci_device_hot_add(): Hot add a PCI device
*
* Return a QDict with the following device information:
*
* - "domain": domain number
* - "bus": bus number
* - "slot": slot number
* - "function": function number
*
* Example:
*
* { "domain": 0, "bus": 0, "slot": 5, "function": 0 }
*/
void pci_device_hot_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
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) {
*ret_data =
qobject_from_jsonf("{ 'domain': 0, 'bus': %d, 'slot': %d, "
"'function': %d }", 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(pci_find_root_bus(0), bus, slot, 0);
if (!d) {
monitor_printf(mon, "slot %d empty\n", slot);
return;
}
qdev_unplug(&d->qdev);
}
void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict,
QObject **ret_data)
{
pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
}
