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 #include "sysemu.h"
  25
  26 /* --------------------------------- */
  27
  28 static char *idebus_get_fw_dev_path(DeviceState *dev);
  29
  30 static struct BusInfo ide_bus_info = {
  31     .name  = "IDE",
  32     .size  = sizeof(IDEBus),
  33     .get_fw_dev_path = idebus_get_fw_dev_path,
  34     .props = (Property[]) {
  35         DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
  36         DEFINE_PROP_END_OF_LIST(),
  37     },
  38 };
  39
  40 void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id)
  41 {
  42     qbus_create_inplace(&idebus->qbus, &ide_bus_info, dev, NULL);
  43     idebus->bus_id = bus_id;
  44 }
  45
  46 static char *idebus_get_fw_dev_path(DeviceState *dev)
  47 {
  48     char path[30];
  49
  50     snprintf(path, sizeof(path), "%s@%d", qdev_fw_name(dev),
  51              ((IDEBus*)dev->parent_bus)->bus_id);
  52
  53     return strdup(path);
  54 }
  55
  56 static int ide_qdev_init(DeviceState *qdev)
  57 {
  58     IDEDevice *dev = IDE_DEVICE(qdev);
  59     IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
  60     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
  61
  62     if (!dev->conf.bs) {
  63         error_report("No drive specified");
  64         goto err;
  65     }
  66     if (dev->unit == -1) {
  67         dev->unit = bus->master ? 1 : 0;
  68     }
  69     switch (dev->unit) {
  70     case 0:
  71         if (bus->master) {
  72             error_report("IDE unit %d is in use", dev->unit);
  73             goto err;
  74         }
  75         bus->master = dev;
  76         break;
  77     case 1:
  78         if (bus->slave) {
  79             error_report("IDE unit %d is in use", dev->unit);
  80             goto err;
  81         }
  82         bus->slave = dev;
  83         break;
  84     default:
  85         error_report("Invalid IDE unit %d", dev->unit);
  86         goto err;
  87     }
  88     return dc->init(dev);
  89
  90 err:
  91     return -1;
  92 }
  93
  94 IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
  95 {
  96     DeviceState *dev;
  97
  98     dev = qdev_create(&bus->qbus, drive->media_cd ? "ide-cd" : "ide-hd");
  99     qdev_prop_set_uint32(dev, "unit", unit);
 100     qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);
 101     qdev_init_nofail(dev);
 102     return DO_UPCAST(IDEDevice, qdev, dev);
 103 }
 104
 105 void ide_get_bs(BlockDriverState *bs[], BusState *qbus)
 106 {
 107     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);
 108     bs[0] = bus->master ? bus->master->conf.bs : NULL;
 109     bs[1] = bus->slave  ? bus->slave->conf.bs  : NULL;
 110 }
 111
 112 /* --------------------------------- */
 113
 114 typedef struct IDEDrive {
 115     IDEDevice dev;
 116 } IDEDrive;
 117
 118 static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
 119 {
 120     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
 121     IDEState *s = bus->ifs + dev->unit;
 122     const char *serial;
 123     DriveInfo *dinfo;
 124
 125     if (dev->conf.discard_granularity && dev->conf.discard_granularity != 512) {
 126         error_report("discard_granularity must be 512 for ide");
 127         return -1;
 128     }
 129
 130     serial = dev->serial;
 131     if (!serial) {
 132         /* try to fall back to value set with legacy -drive serial=... */
 133         dinfo = drive_get_by_blockdev(dev->conf.bs);
 134         if (*dinfo->serial) {
 135             serial = dinfo->serial;
 136         }
 137     }
 138
 139     if (ide_init_drive(s, dev->conf.bs, kind, dev->version, serial) < 0) {
 140         return -1;
 141     }
 142
 143     if (!dev->version) {
 144         dev->version = g_strdup(s->version);
 145     }
 146     if (!dev->serial) {
 147         dev->serial = g_strdup(s->drive_serial_str);
 148     }
 149
 150     add_boot_device_path(dev->conf.bootindex, &dev->qdev,
 151                          dev->unit ? "/disk@1" : "/disk@0");
 152
 153     return 0;
 154 }
 155
 156 static int ide_hd_initfn(IDEDevice *dev)
 157 {
 158     return ide_dev_initfn(dev, IDE_HD);
 159 }
 160
 161 static int ide_cd_initfn(IDEDevice *dev)
 162 {
 163     return ide_dev_initfn(dev, IDE_CD);
 164 }
 165
 166 static int ide_drive_initfn(IDEDevice *dev)
 167 {
 168     DriveInfo *dinfo = drive_get_by_blockdev(dev->conf.bs);
 169
 170     return ide_dev_initfn(dev, dinfo->media_cd ? IDE_CD : IDE_HD);
 171 }
 172
 173 #define DEFINE_IDE_DEV_PROPERTIES()                     \
 174     DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
 175     DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
 176     DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial)
 177
 178 static Property ide_hd_properties[] = {
 179     DEFINE_IDE_DEV_PROPERTIES(),
 180     DEFINE_PROP_END_OF_LIST(),
 181 };
 182
 183 static void ide_hd_class_init(ObjectClass *klass, void *data)
 184 {
 185     DeviceClass *dc = DEVICE_CLASS(klass);
 186     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
 187     k->init = ide_hd_initfn;
 188     dc->fw_name = "drive";
 189     dc->desc = "virtual IDE disk";
 190     dc->props = ide_hd_properties;
 191 }
 192
 193 static TypeInfo ide_hd_info = {
 194     .name          = "ide-hd",
 195     .parent        = TYPE_IDE_DEVICE,
 196     .instance_size = sizeof(IDEDrive),
 197     .class_init    = ide_hd_class_init,
 198 };
 199
 200 static Property ide_cd_properties[] = {
 201     DEFINE_IDE_DEV_PROPERTIES(),
 202     DEFINE_PROP_END_OF_LIST(),
 203 };
 204
 205 static void ide_cd_class_init(ObjectClass *klass, void *data)
 206 {
 207     DeviceClass *dc = DEVICE_CLASS(klass);
 208     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
 209     k->init = ide_cd_initfn;
 210     dc->fw_name = "drive";
 211     dc->desc = "virtual IDE CD-ROM";
 212     dc->props = ide_cd_properties;
 213 }
 214
 215 static TypeInfo ide_cd_info = {
 216     .name          = "ide-cd",
 217     .parent        = TYPE_IDE_DEVICE,
 218     .instance_size = sizeof(IDEDrive),
 219     .class_init    = ide_cd_class_init,
 220 };
 221
 222 static Property ide_drive_properties[] = {
 223     DEFINE_IDE_DEV_PROPERTIES(),
 224     DEFINE_PROP_END_OF_LIST(),
 225 };
 226
 227 static void ide_drive_class_init(ObjectClass *klass, void *data)
 228 {
 229     DeviceClass *dc = DEVICE_CLASS(klass);
 230     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
 231     k->init = ide_drive_initfn;
 232     dc->fw_name = "drive";
 233     dc->desc = "virtual IDE disk or CD-ROM (legacy)";
 234     dc->props = ide_drive_properties;
 235 }
 236
 237 static TypeInfo ide_drive_info = {
 238     .name          = "ide-drive",
 239     .parent        = TYPE_IDE_DEVICE,
 240     .instance_size = sizeof(IDEDrive),
 241     .class_init    = ide_drive_class_init,
 242 };
 243
 244 static void ide_device_class_init(ObjectClass *klass, void *data)
 245 {
 246     DeviceClass *k = DEVICE_CLASS(klass);
 247     k->init = ide_qdev_init;
 248     k->bus_info = &ide_bus_info;
 249 }
 250
 251 static TypeInfo ide_device_type_info = {
 252     .name = TYPE_IDE_DEVICE,
 253     .parent = TYPE_DEVICE,
 254     .instance_size = sizeof(IDEDevice),
 255     .abstract = true,
 256     .class_size = sizeof(IDEDeviceClass),
 257     .class_init = ide_device_class_init,
 258 };
 259
 260 static void ide_dev_register(void)
 261 {
 262     type_register_static(&ide_hd_info);
 263     type_register_static(&ide_cd_info);
 264     type_register_static(&ide_drive_info);
 265     type_register_static(&ide_device_type_info);
 266 }
 267 device_init(ide_dev_register);