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, drive->media_cd ? "ide-cd" : "ide-hd");
 102     qdev_prop_set_uint32(dev, "unit", unit);
 103     qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);
 104     qdev_init_nofail(dev);
 105     return DO_UPCAST(IDEDevice, qdev, dev);
 106 }
 107
 108 void ide_get_bs(BlockDriverState *bs[], BusState *qbus)
 109 {
 110     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);
 111     bs[0] = bus->master ? bus->master->conf.bs : NULL;
 112     bs[1] = bus->slave  ? bus->slave->conf.bs  : NULL;
 113 }
 114
 115 /* --------------------------------- */
 116
 117 typedef struct IDEDrive {
 118     IDEDevice dev;
 119 } IDEDrive;
 120
 121 static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
 122 {
 123     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
 124     IDEState *s = bus->ifs + dev->unit;
 125     const char *serial;
 126     DriveInfo *dinfo;
 127
 128     if (dev->conf.discard_granularity && dev->conf.discard_granularity != 512) {
 129         error_report("discard_granularity must be 512 for ide");
 130         return -1;
 131     }
 132
 133     serial = dev->serial;
 134     if (!serial) {
 135         /* try to fall back to value set with legacy -drive serial=... */
 136         dinfo = drive_get_by_blockdev(dev->conf.bs);
 137         if (*dinfo->serial) {
 138             serial = dinfo->serial;
 139         }
 140     }
 141
 142     if (ide_init_drive(s, dev->conf.bs, kind, dev->version, serial) < 0) {
 143         return -1;
 144     }
 145
 146     if (!dev->version) {
 147         dev->version = qemu_strdup(s->version);
 148     }
 149     if (!dev->serial) {
 150         dev->serial = qemu_strdup(s->drive_serial_str);
 151     }
 152
 153     add_boot_device_path(dev->conf.bootindex, &dev->qdev,
 154                          dev->unit ? "/disk@1" : "/disk@0");
 155
 156     return 0;
 157 }
 158
 159 static int ide_hd_initfn(IDEDevice *dev)
 160 {
 161     return ide_dev_initfn(dev, IDE_HD);
 162 }
 163
 164 static int ide_cd_initfn(IDEDevice *dev)
 165 {
 166     return ide_dev_initfn(dev, IDE_CD);
 167 }
 168
 169 static int ide_drive_initfn(IDEDevice *dev)
 170 {
 171     DriveInfo *dinfo = drive_get_by_blockdev(dev->conf.bs);
 172
 173     return ide_dev_initfn(dev, dinfo->media_cd ? IDE_CD : IDE_HD);
 174 }
 175
 176 #define DEFINE_IDE_DEV_PROPERTIES()                     \
 177     DEFINE_PROP_UINT32("unit", IDEDrive, dev.unit, -1), \
 178     DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
 179     DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
 180     DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial)
 181
 182 static IDEDeviceInfo ide_dev_info[] = {
 183     {
 184         .qdev.name    = "ide-hd",
 185         .qdev.fw_name = "drive",
 186         .qdev.desc    = "virtual IDE disk",
 187         .qdev.size    = sizeof(IDEDrive),
 188         .init         = ide_hd_initfn,
 189         .qdev.props   = (Property[]) {
 190             DEFINE_IDE_DEV_PROPERTIES(),
 191             DEFINE_PROP_END_OF_LIST(),
 192         }
 193     },{
 194         .qdev.name    = "ide-cd",
 195         .qdev.fw_name = "drive",
 196         .qdev.desc    = "virtual IDE CD-ROM",
 197         .qdev.size    = sizeof(IDEDrive),
 198         .init         = ide_cd_initfn,
 199         .qdev.props   = (Property[]) {
 200             DEFINE_IDE_DEV_PROPERTIES(),
 201             DEFINE_PROP_END_OF_LIST(),
 202         }
 203     },{
 204         .qdev.name    = "ide-drive", /* legacy -device ide-drive */
 205         .qdev.fw_name = "drive",
 206         .qdev.desc    = "virtual IDE disk or CD-ROM (legacy)",
 207         .qdev.size    = sizeof(IDEDrive),
 208         .init         = ide_drive_initfn,
 209         .qdev.props   = (Property[]) {
 210             DEFINE_IDE_DEV_PROPERTIES(),
 211             DEFINE_PROP_END_OF_LIST(),
 212         }
 213     }
 214 };
 215
 216 static void ide_dev_register(void)
 217 {
 218     int i;
 219
 220     for (i = 0; i < ARRAY_SIZE(ide_dev_info); i++) {
 221         ide_qdev_register(&ide_dev_info[i]);
 222     }
 223 }
 224 device_init(ide_dev_register);