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 };
  35
  36 void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id)
  37 {
  38     qbus_create_inplace(&idebus->qbus, &ide_bus_info, dev, NULL);
  39     idebus->bus_id = bus_id;
  40 }
  41
  42 static char *idebus_get_fw_dev_path(DeviceState *dev)
  43 {
  44     char path[30];
  45
  46     snprintf(path, sizeof(path), "%s@%d", qdev_fw_name(dev),
  47              ((IDEBus*)dev->parent_bus)->bus_id);
  48
  49     return strdup(path);
  50 }
  51
  52 static int ide_qdev_init(DeviceState *qdev, DeviceInfo *base)
  53 {
  54     IDEDevice *dev = DO_UPCAST(IDEDevice, qdev, qdev);
  55     IDEDeviceInfo *info = DO_UPCAST(IDEDeviceInfo, qdev, base);
  56     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
  57
  58     if (!dev->conf.bs) {
  59         error_report("No drive specified");
  60         goto err;
  61     }
  62     if (dev->unit == -1) {
  63         dev->unit = bus->master ? 1 : 0;
  64     }
  65     switch (dev->unit) {
  66     case 0:
  67         if (bus->master) {
  68             error_report("IDE unit %d is in use", dev->unit);
  69             goto err;
  70         }
  71         bus->master = dev;
  72         break;
  73     case 1:
  74         if (bus->slave) {
  75             error_report("IDE unit %d is in use", dev->unit);
  76             goto err;
  77         }
  78         bus->slave = dev;
  79         break;
  80     default:
  81         error_report("Invalid IDE unit %d", dev->unit);
  82         goto err;
  83     }
  84     return info->init(dev);
  85
  86 err:
  87     return -1;
  88 }
  89
  90 static void ide_qdev_register(IDEDeviceInfo *info)
  91 {
  92     info->qdev.init = ide_qdev_init;
  93     info->qdev.bus_info = &ide_bus_info;
  94     qdev_register(&info->qdev);
  95 }
  96
  97 IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
  98 {
  99     DeviceState *dev;
 100
 101     dev = qdev_create(&bus->qbus,
 102                       bdrv_get_type_hint(drive->bdrv) == BDRV_TYPE_CDROM
 103                       ? "ide-cd" : "ide-hd");
 104     qdev_prop_set_uint32(dev, "unit", unit);
 105     qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);
 106     qdev_init_nofail(dev);
 107     return DO_UPCAST(IDEDevice, qdev, dev);
 108 }
 109
 110 void ide_get_bs(BlockDriverState *bs[], BusState *qbus)
 111 {
 112     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);
 113     bs[0] = bus->master ? bus->master->conf.bs : NULL;
 114     bs[1] = bus->slave  ? bus->slave->conf.bs  : NULL;
 115 }
 116
 117 /* --------------------------------- */
 118
 119 typedef struct IDEDrive {
 120     IDEDevice dev;
 121 } IDEDrive;
 122
 123 static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
 124 {
 125     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
 126     IDEState *s = bus->ifs + dev->unit;
 127     const char *serial;
 128     DriveInfo *dinfo;
 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 = qemu_strdup(s->version);
 145     }
 146     if (!dev->serial) {
 147         dev->serial = qemu_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     return ide_dev_initfn(dev,
 169                           bdrv_get_type_hint(dev->conf.bs) == BDRV_TYPE_CDROM
 170                           ? IDE_CD : IDE_HD);
 171 }
 172
 173 #define DEFINE_IDE_DEV_PROPERTIES()                     \
 174     DEFINE_PROP_UINT32("unit", IDEDrive, dev.unit, -1), \
 175     DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
 176     DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
 177     DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial)
 178
 179 static IDEDeviceInfo ide_dev_info[] = {
 180     {
 181         .qdev.name    = "ide-hd",
 182         .qdev.fw_name = "drive",
 183         .qdev.desc    = "virtual IDE disk",
 184         .qdev.size    = sizeof(IDEDrive),
 185         .init         = ide_hd_initfn,
 186         .qdev.props   = (Property[]) {
 187             DEFINE_IDE_DEV_PROPERTIES(),
 188             DEFINE_PROP_END_OF_LIST(),
 189         }
 190     },{
 191         .qdev.name    = "ide-cd",
 192         .qdev.fw_name = "drive",
 193         .qdev.desc    = "virtual IDE CD-ROM",
 194         .qdev.size    = sizeof(IDEDrive),
 195         .init         = ide_cd_initfn,
 196         .qdev.props   = (Property[]) {
 197             DEFINE_IDE_DEV_PROPERTIES(),
 198             DEFINE_PROP_END_OF_LIST(),
 199         }
 200     },{
 201         .qdev.name    = "ide-drive", /* legacy -device ide-drive */
 202         .qdev.fw_name = "drive",
 203         .qdev.desc    = "virtual IDE disk or CD-ROM (legacy)",
 204         .qdev.size    = sizeof(IDEDrive),
 205         .init         = ide_drive_initfn,
 206         .qdev.props   = (Property[]) {
 207             DEFINE_IDE_DEV_PROPERTIES(),
 208             DEFINE_PROP_END_OF_LIST(),
 209         }
 210     }
 211 };
 212
 213 static void ide_dev_register(void)
 214 {
 215     int i;
 216
 217     for (i = 0; i < ARRAY_SIZE(ide_dev_info); i++) {
 218         ide_qdev_register(&ide_dev_info[i]);
 219     }
 220 }
 221 device_init(ide_dev_register);