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, DeviceInfo *base)
  57 {
  58     IDEDevice *dev = DO_UPCAST(IDEDevice, qdev, qdev);
  59     IDEDeviceInfo *info = DO_UPCAST(IDEDeviceInfo, qdev, base);
  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 info->init(dev);
  89
  90 err:
  91     return -1;
  92 }
  93
  94 static void ide_qdev_register(IDEDeviceInfo *info)
  95 {
  96     info->qdev.init = ide_qdev_init;
  97     info->qdev.bus_info = &ide_bus_info;
  98     qdev_register(&info->qdev);
  99 }
 100
 101 IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
 102 {
 103     DeviceState *dev;
 104
 105     dev = qdev_create(&bus->qbus, drive->media_cd ? "ide-cd" : "ide-hd");
 106     qdev_prop_set_uint32(dev, "unit", unit);
 107     qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);
 108     qdev_init_nofail(dev);
 109     return DO_UPCAST(IDEDevice, qdev, dev);
 110 }
 111
 112 void ide_get_bs(BlockDriverState *bs[], BusState *qbus)
 113 {
 114     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);
 115     bs[0] = bus->master ? bus->master->conf.bs : NULL;
 116     bs[1] = bus->slave  ? bus->slave->conf.bs  : NULL;
 117 }
 118
 119 /* --------------------------------- */
 120
 121 typedef struct IDEDrive {
 122     IDEDevice dev;
 123 } IDEDrive;
 124
 125 static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
 126 {
 127     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
 128     IDEState *s = bus->ifs + dev->unit;
 129     const char *serial;
 130     DriveInfo *dinfo;
 131
 132     if (dev->conf.discard_granularity && dev->conf.discard_granularity != 512) {
 133         error_report("discard_granularity must be 512 for ide");
 134         return -1;
 135     }
 136
 137     serial = dev->serial;
 138     if (!serial) {
 139         /* try to fall back to value set with legacy -drive serial=... */
 140         dinfo = drive_get_by_blockdev(dev->conf.bs);
 141         if (*dinfo->serial) {
 142             serial = dinfo->serial;
 143         }
 144     }
 145
 146     if (ide_init_drive(s, dev->conf.bs, kind, dev->version, serial) < 0) {
 147         return -1;
 148     }
 149
 150     if (!dev->version) {
 151         dev->version = qemu_strdup(s->version);
 152     }
 153     if (!dev->serial) {
 154         dev->serial = qemu_strdup(s->drive_serial_str);
 155     }
 156
 157     add_boot_device_path(dev->conf.bootindex, &dev->qdev,
 158                          dev->unit ? "/disk@1" : "/disk@0");
 159
 160     return 0;
 161 }
 162
 163 static int ide_hd_initfn(IDEDevice *dev)
 164 {
 165     return ide_dev_initfn(dev, IDE_HD);
 166 }
 167
 168 static int ide_cd_initfn(IDEDevice *dev)
 169 {
 170     return ide_dev_initfn(dev, IDE_CD);
 171 }
 172
 173 static int ide_drive_initfn(IDEDevice *dev)
 174 {
 175     DriveInfo *dinfo = drive_get_by_blockdev(dev->conf.bs);
 176
 177     return ide_dev_initfn(dev, dinfo->media_cd ? IDE_CD : IDE_HD);
 178 }
 179
 180 #define DEFINE_IDE_DEV_PROPERTIES()                     \
 181     DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
 182     DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
 183     DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial)
 184
 185 static IDEDeviceInfo ide_dev_info[] = {
 186     {
 187         .qdev.name    = "ide-hd",
 188         .qdev.fw_name = "drive",
 189         .qdev.desc    = "virtual IDE disk",
 190         .qdev.size    = sizeof(IDEDrive),
 191         .init         = ide_hd_initfn,
 192         .qdev.props   = (Property[]) {
 193             DEFINE_IDE_DEV_PROPERTIES(),
 194             DEFINE_PROP_END_OF_LIST(),
 195         }
 196     },{
 197         .qdev.name    = "ide-cd",
 198         .qdev.fw_name = "drive",
 199         .qdev.desc    = "virtual IDE CD-ROM",
 200         .qdev.size    = sizeof(IDEDrive),
 201         .init         = ide_cd_initfn,
 202         .qdev.props   = (Property[]) {
 203             DEFINE_IDE_DEV_PROPERTIES(),
 204             DEFINE_PROP_END_OF_LIST(),
 205         }
 206     },{
 207         .qdev.name    = "ide-drive", /* legacy -device ide-drive */
 208         .qdev.fw_name = "drive",
 209         .qdev.desc    = "virtual IDE disk or CD-ROM (legacy)",
 210         .qdev.size    = sizeof(IDEDrive),
 211         .init         = ide_drive_initfn,
 212         .qdev.props   = (Property[]) {
 213             DEFINE_IDE_DEV_PROPERTIES(),
 214             DEFINE_PROP_END_OF_LIST(),
 215         }
 216     }
 217 };
 218
 219 static void ide_dev_register(void)
 220 {
 221     int i;
 222
 223     for (i = 0; i < ARRAY_SIZE(ide_dev_info); i++) {
 224         ide_qdev_register(&ide_dev_info[i]);
 225     }
 226 }
 227 device_init(ide_dev_register);