Archipelago » qemu

/*

 * ide bus support for qdev.

 *

 * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 */

#include <hw/hw.h>

#include "dma.h"

#include "qemu-error.h"

#include <hw/ide/internal.h>

#include "blockdev.h"

#include "sysemu.h"

/* --------------------------------- */

static char *idebus_get_fw_dev_path(DeviceState *dev);

static struct BusInfo ide_bus_info = {

    .name  = "IDE",

    .size  = sizeof(IDEBus),

    .get_fw_dev_path = idebus_get_fw_dev_path,

    .props = (Property[]) {

        DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),

        DEFINE_PROP_END_OF_LIST(),

    },

};

void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id)

{

    qbus_create_inplace(&idebus->qbus, &ide_bus_info, dev, NULL);

    idebus->bus_id = bus_id;

}

static char *idebus_get_fw_dev_path(DeviceState *dev)

{

    char path[30];

    snprintf(path, sizeof(path), "%s@%d", qdev_fw_name(dev),

             ((IDEBus*)dev->parent_bus)->bus_id);

    return strdup(path);

}

static int ide_qdev_init(DeviceState *qdev, DeviceInfo *base)

{

    IDEDevice *dev = DO_UPCAST(IDEDevice, qdev, qdev);

    IDEDeviceInfo *info = DO_UPCAST(IDEDeviceInfo, qdev, base);

    IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);

    if (!dev->conf.bs) {

        error_report("No drive specified");

        goto err;

    }

    if (dev->unit == -1) {

        dev->unit = bus->master ? 1 : 0;

    }

    switch (dev->unit) {

    case 0:

        if (bus->master) {

            error_report("IDE unit %d is in use", dev->unit);

            goto err;

        }

        bus->master = dev;

        break;

    case 1:

        if (bus->slave) {

            error_report("IDE unit %d is in use", dev->unit);

            goto err;

        }

        bus->slave = dev;

        break;

    default:

        error_report("Invalid IDE unit %d", dev->unit);

        goto err;

    }

    return info->init(dev);

err:

    return -1;

}

static void ide_qdev_register(IDEDeviceInfo *info)

{

    info->qdev.init = ide_qdev_init;

    info->qdev.bus_info = &ide_bus_info;

    qdev_register(&info->qdev);

}

IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)

{

    DeviceState *dev;

    dev = qdev_create(&bus->qbus, drive->media_cd ? "ide-cd" : "ide-hd");

    qdev_prop_set_uint32(dev, "unit", unit);

    qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);

    qdev_init_nofail(dev);

    return DO_UPCAST(IDEDevice, qdev, dev);

}

void ide_get_bs(BlockDriverState *bs[], BusState *qbus)

{

    IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);

    bs[0] = bus->master ? bus->master->conf.bs : NULL;

    bs[1] = bus->slave  ? bus->slave->conf.bs  : NULL;

}

/* --------------------------------- */

typedef struct IDEDrive {

    IDEDevice dev;

} IDEDrive;

static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)

{

    IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);

    IDEState *s = bus->ifs + dev->unit;

    const char *serial;

    DriveInfo *dinfo;

    if (dev->conf.discard_granularity && dev->conf.discard_granularity != 512) {

        error_report("discard_granularity must be 512 for ide");

        return -1;

    }

    serial = dev->serial;

    if (!serial) {

        /* try to fall back to value set with legacy -drive serial=... */

        dinfo = drive_get_by_blockdev(dev->conf.bs);

        if (*dinfo->serial) {

            serial = dinfo->serial;

        }

    }

    if (ide_init_drive(s, dev->conf.bs, kind, dev->version, serial) < 0) {

        return -1;

    }

    if (!dev->version) {

        dev->version = qemu_strdup(s->version);

    }

    if (!dev->serial) {

        dev->serial = qemu_strdup(s->drive_serial_str);

    }

    add_boot_device_path(dev->conf.bootindex, &dev->qdev,

                         dev->unit ? "/disk@1" : "/disk@0");

    return 0;

}

static int ide_hd_initfn(IDEDevice *dev)

{

    return ide_dev_initfn(dev, IDE_HD);

}

static int ide_cd_initfn(IDEDevice *dev)

{

    return ide_dev_initfn(dev, IDE_CD);

}

static int ide_drive_initfn(IDEDevice *dev)

{

    DriveInfo *dinfo = drive_get_by_blockdev(dev->conf.bs);

    return ide_dev_initfn(dev, dinfo->media_cd ? IDE_CD : IDE_HD);

}

#define DEFINE_IDE_DEV_PROPERTIES()                     \

    DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \

    DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \

    DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial)

static IDEDeviceInfo ide_dev_info[] = {

    {

        .qdev.name    = "ide-hd",

        .qdev.fw_name = "drive",

        .qdev.desc    = "virtual IDE disk",

        .qdev.size    = sizeof(IDEDrive),

        .init         = ide_hd_initfn,

        .qdev.props   = (Property[]) {

            DEFINE_IDE_DEV_PROPERTIES(),

            DEFINE_PROP_END_OF_LIST(),

        }

    },{

        .qdev.name    = "ide-cd",

        .qdev.fw_name = "drive",

        .qdev.desc    = "virtual IDE CD-ROM",

        .qdev.size    = sizeof(IDEDrive),

        .init         = ide_cd_initfn,

        .qdev.props   = (Property[]) {

            DEFINE_IDE_DEV_PROPERTIES(),

            DEFINE_PROP_END_OF_LIST(),

        }

    },{

        .qdev.name    = "ide-drive", /* legacy -device ide-drive */

        .qdev.fw_name = "drive",

        .qdev.desc    = "virtual IDE disk or CD-ROM (legacy)",

        .qdev.size    = sizeof(IDEDrive),

        .init         = ide_drive_initfn,

        .qdev.props   = (Property[]) {

            DEFINE_IDE_DEV_PROPERTIES(),

            DEFINE_PROP_END_OF_LIST(),

        }

    }

};

static void ide_dev_register(void)

{

    int i;

    for (i = 0; i < ARRAY_SIZE(ide_dev_info); i++) {

        ide_qdev_register(&ide_dev_info[i]);

    }

}

device_init(ide_dev_register);