hw/ide/qdev.c

   1 /*
   2  * ide bus support for qdev.
   3  *
   4  * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include <hw/hw.h>
  20 #include "dma.h"
  21 #include "qemu-error.h"
  22 #include <hw/ide/internal.h>
  23 #include "blockdev.h"
  24
  25 /* --------------------------------- */
  26
  27 static struct BusInfo ide_bus_info = {
  28     .name  = "IDE",
  29     .size  = sizeof(IDEBus),
  30 };
  31
  32 void ide_bus_new(IDEBus *idebus, DeviceState *dev)
  33 {
  34     qbus_create_inplace(&idebus->qbus, &ide_bus_info, dev, NULL);
  35 }
  36
  37 static int ide_qdev_init(DeviceState *qdev, DeviceInfo *base)
  38 {
  39     IDEDevice *dev = DO_UPCAST(IDEDevice, qdev, qdev);
  40     IDEDeviceInfo *info = DO_UPCAST(IDEDeviceInfo, qdev, base);
  41     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
  42
  43     if (!dev->conf.bs) {
  44         error_report("No drive specified");
  45         goto err;
  46     }
  47     if (dev->unit == -1) {
  48         dev->unit = bus->master ? 1 : 0;
  49     }
  50     switch (dev->unit) {
  51     case 0:
  52         if (bus->master) {
  53             error_report("IDE unit %d is in use", dev->unit);
  54             goto err;
  55         }
  56         bus->master = dev;
  57         break;
  58     case 1:
  59         if (bus->slave) {
  60             error_report("IDE unit %d is in use", dev->unit);
  61             goto err;
  62         }
  63         bus->slave = dev;
  64         break;
  65     default:
  66         error_report("Invalid IDE unit %d", dev->unit);
  67         goto err;
  68     }
  69     return info->init(dev);
  70
  71 err:
  72     return -1;
  73 }
  74
  75 static void ide_qdev_register(IDEDeviceInfo *info)
  76 {
  77     info->qdev.init = ide_qdev_init;
  78     info->qdev.bus_info = &ide_bus_info;
  79     qdev_register(&info->qdev);
  80 }
  81
  82 IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
  83 {
  84     DeviceState *dev;
  85
  86     dev = qdev_create(&bus->qbus, "ide-drive");
  87     qdev_prop_set_uint32(dev, "unit", unit);
  88     qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);
  89     qdev_init_nofail(dev);
  90     return DO_UPCAST(IDEDevice, qdev, dev);
  91 }
  92
  93 void ide_get_bs(BlockDriverState *bs[], BusState *qbus)
  94 {
  95     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);
  96     bs[0] = bus->master ? bus->master->conf.bs : NULL;
  97     bs[1] = bus->slave  ? bus->slave->conf.bs  : NULL;
  98 }
  99
 100 /* --------------------------------- */
 101
 102 typedef struct IDEDrive {
 103     IDEDevice dev;
 104 } IDEDrive;
 105
 106 static int ide_drive_initfn(IDEDevice *dev)
 107 {
 108     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
 109     IDEState *s = bus->ifs + dev->unit;
 110     const char *serial;
 111     DriveInfo *dinfo;
 112
 113     serial = dev->serial;
 114     if (!serial) {
 115         /* try to fall back to value set with legacy -drive serial=... */
 116         dinfo = drive_get_by_blockdev(dev->conf.bs);
 117         if (*dinfo->serial) {
 118             serial = dinfo->serial;
 119         }
 120     }
 121
 122     if (ide_init_drive(s, dev->conf.bs, dev->version, serial) < 0) {
 123         return -1;
 124     }
 125
 126     if (!dev->version) {
 127         dev->version = qemu_strdup(s->version);
 128     }
 129     if (!dev->serial) {
 130         dev->serial = qemu_strdup(s->drive_serial_str);
 131     }
 132     return 0;
 133 }
 134
 135 static IDEDeviceInfo ide_drive_info = {
 136     .qdev.name  = "ide-drive",
 137     .qdev.size  = sizeof(IDEDrive),
 138     .init       = ide_drive_initfn,
 139     .qdev.props = (Property[]) {
 140         DEFINE_PROP_UINT32("unit", IDEDrive, dev.unit, -1),
 141         DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),
 142         DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),
 143         DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial),
 144         DEFINE_PROP_END_OF_LIST(),
 145     }
 146 };
 147
 148 static void ide_drive_register(void)
 149 {
 150     ide_qdev_register(&ide_drive_info);
 151 }
 152 device_init(ide_drive_register);