Archipelago » qemu

/*

 * 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 "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;

    }

    return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);

}

void drive_hot_add(Monitor *mon, const char *pci_addr, const char *opts)

{

    int dom, pci_bus;

    unsigned slot;

    int type, bus;

    int success = 0;

    PCIDevice *dev;

    DriveInfo *dinfo;

    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;

        lsi_scsi_attach(&dev->qdev, dinfo->bdrv,

                        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;

    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 char *pci_addr, const char *type,

                        const char *opts)

{

    PCIDevice *dev = NULL;

    /* 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);

}

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;

    }

    pci_unregister_device(d);

}