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
  24 /* --------------------------------- */
  25
  26 static struct BusInfo ide_bus_info = {
  27     .name  = "IDE",
  28     .size  = sizeof(IDEBus),
  29 };
  30
  31 void ide_bus_new(IDEBus *idebus, DeviceState *dev)
  32 {
  33     qbus_create_inplace(&idebus->qbus, &ide_bus_info, dev, NULL);
  34 }
  35
  36 static int ide_qdev_init(DeviceState *qdev, DeviceInfo *base)
  37 {
  38     IDEDevice *dev = DO_UPCAST(IDEDevice, qdev, qdev);
  39     IDEDeviceInfo *info = DO_UPCAST(IDEDeviceInfo, qdev, base);
  40     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
  41
  42     if (!dev->conf.bs) {
  43         error_report("No drive specified");
  44         goto err;
  45     }
  46     if (dev->unit == -1) {
  47         dev->unit = bus->master ? 1 : 0;
  48     }
  49     switch (dev->unit) {
  50     case 0:
  51         if (bus->master) {
  52             error_report("IDE unit %d is in use", dev->unit);
  53             goto err;
  54         }
  55         bus->master = dev;
  56         break;
  57     case 1:
  58         if (bus->slave) {
  59             error_report("IDE unit %d is in use", dev->unit);
  60             goto err;
  61         }
  62         bus->slave = dev;
  63         break;
  64     default:
  65         error_report("Invalid IDE unit %d", dev->unit);
  66         goto err;
  67     }
  68     return info->init(dev);
  69
  70 err:
  71     return -1;
  72 }
  73
  74 static void ide_qdev_register(IDEDeviceInfo *info)
  75 {
  76     info->qdev.init = ide_qdev_init;
  77     info->qdev.bus_info = &ide_bus_info;
  78     qdev_register(&info->qdev);
  79 }
  80
  81 IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
  82 {
  83     DeviceState *dev;
  84
  85     dev = qdev_create(&bus->qbus, "ide-drive");
  86     qdev_prop_set_uint32(dev, "unit", unit);
  87     qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);
  88     qdev_init_nofail(dev);
  89     return DO_UPCAST(IDEDevice, qdev, dev);
  90 }
  91
  92 void ide_get_bs(BlockDriverState *bs[], BusState *qbus)
  93 {
  94     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);
  95     bs[0] = bus->master ? bus->master->conf.bs : NULL;
  96     bs[1] = bus->slave  ? bus->slave->conf.bs  : NULL;
  97 }
  98
  99 /* --------------------------------- */
 100
 101 typedef struct IDEDrive {
 102     IDEDevice dev;
 103 } IDEDrive;
 104
 105 static int ide_drive_initfn(IDEDevice *dev)
 106 {
 107     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
 108     IDEState *s = bus->ifs + dev->unit;
 109     const char *serial;
 110     DriveInfo *dinfo;
 111
 112     serial = dev->serial;
 113     if (!serial) {
 114         /* try to fall back to value set with legacy -drive serial=... */
 115         dinfo = drive_get_by_blockdev(dev->conf.bs);
 116         if (*dinfo->serial) {
 117             serial = dinfo->serial;
 118         }
 119     }
 120
 121     if (ide_init_drive(s, dev->conf.bs, dev->version, serial) < 0) {
 122         return -1;
 123     }
 124
 125     if (!dev->version) {
 126         dev->version = qemu_strdup(s->version);
 127     }
 128     if (!dev->serial) {
 129         dev->serial = qemu_strdup(s->drive_serial_str);
 130     }
 131     return 0;
 132 }
 133
 134 static IDEDeviceInfo ide_drive_info = {
 135     .qdev.name  = "ide-drive",
 136     .qdev.size  = sizeof(IDEDrive),
 137     .init       = ide_drive_initfn,
 138     .qdev.props = (Property[]) {
 139         DEFINE_PROP_UINT32("unit", IDEDrive, dev.unit, -1),
 140         DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),
 141         DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),
 142         DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial),
 143         DEFINE_PROP_END_OF_LIST(),
 144     }
 145 };
 146
 147 static void ide_drive_register(void)
 148 {
 149     ide_qdev_register(&ide_drive_info);
 150 }
 151 device_init(ide_drive_register);