mirror of https://gitee.com/openkylin/qemu.git
278 lines
8.0 KiB
C
278 lines
8.0 KiB
C
/*
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* QEMU PCI hotplug support
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*
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* Copyright (c) 2004 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h"
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#include "boards.h"
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#include "pci.h"
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#include "net.h"
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#include "pc.h"
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#include "monitor.h"
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#include "scsi.h"
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#include "virtio-blk.h"
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#include "qemu-config.h"
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#include "blockdev.h"
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#if defined(TARGET_I386)
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static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
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const char *devaddr,
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const char *opts_str)
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{
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QemuOpts *opts;
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PCIBus *bus;
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int ret, devfn;
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bus = pci_get_bus_devfn(&devfn, devaddr);
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if (!bus) {
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monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
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return NULL;
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}
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if (!((BusState*)bus)->allow_hotplug) {
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monitor_printf(mon, "PCI bus doesn't support hotplug\n");
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return NULL;
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}
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opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
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if (!opts) {
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return NULL;
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}
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qemu_opt_set(opts, "type", "nic");
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ret = net_client_init(mon, opts, 0);
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if (ret < 0)
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return NULL;
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if (nd_table[ret].devaddr) {
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monitor_printf(mon, "Parameter addr not supported\n");
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return NULL;
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}
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return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
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}
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static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
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DriveInfo *dinfo, int printinfo)
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{
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SCSIBus *scsibus;
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SCSIDevice *scsidev;
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scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
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if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
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error_report("Device is not a SCSI adapter");
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return -1;
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}
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/*
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* drive_init() tries to find a default for dinfo->unit. Doesn't
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* work at all for hotplug though as we assign the device to a
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* specific bus instead of the first bus with spare scsi ids.
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*
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* Ditch the calculated value and reload from option string (if
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* specified).
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*/
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dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
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dinfo->bus = scsibus->busnr;
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scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit,
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false, -1);
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if (!scsidev) {
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return -1;
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}
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dinfo->unit = scsidev->id;
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if (printinfo)
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monitor_printf(mon, "OK bus %d, unit %d\n",
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scsibus->busnr, scsidev->id);
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return 0;
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}
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int pci_drive_hot_add(Monitor *mon, const QDict *qdict,
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DriveInfo *dinfo, int type)
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{
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int dom, pci_bus;
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unsigned slot;
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PCIDevice *dev;
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const char *pci_addr = qdict_get_str(qdict, "pci_addr");
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switch (type) {
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case IF_SCSI:
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if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
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goto err;
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}
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dev = pci_find_device(pci_find_root_bus(dom), pci_bus,
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PCI_DEVFN(slot, 0));
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if (!dev) {
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monitor_printf(mon, "no pci device with address %s\n", pci_addr);
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goto err;
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}
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if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
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goto err;
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}
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break;
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default:
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monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
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goto err;
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}
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return 0;
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err:
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return -1;
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}
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static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
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const char *devaddr,
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const char *opts)
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{
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PCIDevice *dev;
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DriveInfo *dinfo = NULL;
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int type = -1;
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char buf[128];
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PCIBus *bus;
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int devfn;
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if (get_param_value(buf, sizeof(buf), "if", opts)) {
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if (!strcmp(buf, "scsi"))
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type = IF_SCSI;
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else if (!strcmp(buf, "virtio")) {
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type = IF_VIRTIO;
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} else {
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monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
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return NULL;
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}
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} else {
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monitor_printf(mon, "no if= specified\n");
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return NULL;
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}
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if (get_param_value(buf, sizeof(buf), "file", opts)) {
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dinfo = add_init_drive(opts);
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if (!dinfo)
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return NULL;
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if (dinfo->devaddr) {
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monitor_printf(mon, "Parameter addr not supported\n");
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return NULL;
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}
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} else {
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dinfo = NULL;
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}
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bus = pci_get_bus_devfn(&devfn, devaddr);
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if (!bus) {
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monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
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return NULL;
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}
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if (!((BusState*)bus)->allow_hotplug) {
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monitor_printf(mon, "PCI bus doesn't support hotplug\n");
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return NULL;
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}
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switch (type) {
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case IF_SCSI:
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dev = pci_create(bus, devfn, "lsi53c895a");
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if (qdev_init(&dev->qdev) < 0)
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dev = NULL;
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if (dev && dinfo) {
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if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
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qdev_unplug(&dev->qdev);
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dev = NULL;
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}
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}
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break;
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case IF_VIRTIO:
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if (!dinfo) {
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monitor_printf(mon, "virtio requires a backing file/device.\n");
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return NULL;
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}
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dev = pci_create(bus, devfn, "virtio-blk-pci");
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if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
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qdev_free(&dev->qdev);
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dev = NULL;
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break;
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}
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if (qdev_init(&dev->qdev) < 0)
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dev = NULL;
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break;
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default:
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dev = NULL;
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}
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return dev;
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}
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void pci_device_hot_add(Monitor *mon, const QDict *qdict)
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{
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PCIDevice *dev = NULL;
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const char *pci_addr = qdict_get_str(qdict, "pci_addr");
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const char *type = qdict_get_str(qdict, "type");
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const char *opts = qdict_get_try_str(qdict, "opts");
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/* strip legacy tag */
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if (!strncmp(pci_addr, "pci_addr=", 9)) {
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pci_addr += 9;
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}
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if (!opts) {
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opts = "";
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}
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if (!strcmp(pci_addr, "auto"))
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pci_addr = NULL;
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if (strcmp(type, "nic") == 0) {
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dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
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} else if (strcmp(type, "storage") == 0) {
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dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
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} else {
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monitor_printf(mon, "invalid type: %s\n", type);
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}
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if (dev) {
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monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
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pci_find_domain(dev->bus),
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pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
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PCI_FUNC(dev->devfn));
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} else
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monitor_printf(mon, "failed to add %s\n", opts);
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}
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#endif
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static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
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{
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PCIDevice *d;
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int dom, bus;
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unsigned slot;
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if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
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return -1;
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}
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d = pci_find_device(pci_find_root_bus(dom), bus, PCI_DEVFN(slot, 0));
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if (!d) {
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monitor_printf(mon, "slot %d empty\n", slot);
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return -1;
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}
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return qdev_unplug(&d->qdev);
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}
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void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
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{
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pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
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}
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