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
  20 #include "qemu/osdep.h"
  21 #include "sysemu/dma.h"
  22 #include "qapi/error.h"
  23 #include "qapi/qapi-types-block.h"
  24 #include "qemu/error-report.h"
  25 #include "qemu/main-loop.h"
  26 #include "qemu/module.h"
  27 #include "hw/ide/internal.h"
  28 #include "sysemu/block-backend.h"
  29 #include "sysemu/blockdev.h"
  30 #include "hw/block/block.h"
  31 #include "sysemu/sysemu.h"
  32 #include "qapi/visitor.h"
  33
  34 /* --------------------------------- */
  35
  36 static char *idebus_get_fw_dev_path(DeviceState *dev);
  37 static void idebus_unrealize(BusState *qdev, Error **errp);
  38
  39 static Property ide_props[] = {
  40     DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
  41     DEFINE_PROP_END_OF_LIST(),
  42 };
  43
  44 static void ide_bus_class_init(ObjectClass *klass, void *data)
  45 {
  46     BusClass *k = BUS_CLASS(klass);
  47
  48     k->get_fw_dev_path = idebus_get_fw_dev_path;
  49     k->unrealize = idebus_unrealize;
  50 }
  51
  52 static void idebus_unrealize(BusState *bus, Error **errp)
  53 {
  54     IDEBus *ibus = IDE_BUS(bus);
  55
  56     if (ibus->vmstate) {
  57         qemu_del_vm_change_state_handler(ibus->vmstate);
  58     }
  59 }
  60
  61 static const TypeInfo ide_bus_info = {
  62     .name = TYPE_IDE_BUS,
  63     .parent = TYPE_BUS,
  64     .instance_size = sizeof(IDEBus),
  65     .class_init = ide_bus_class_init,
  66 };
  67
  68 void ide_bus_new(IDEBus *idebus, size_t idebus_size, DeviceState *dev,
  69                  int bus_id, int max_units)
  70 {
  71     qbus_create_inplace(idebus, idebus_size, TYPE_IDE_BUS, dev, NULL);
  72     idebus->bus_id = bus_id;
  73     idebus->max_units = max_units;
  74 }
  75
  76 static char *idebus_get_fw_dev_path(DeviceState *dev)
  77 {
  78     char path[30];
  79
  80     snprintf(path, sizeof(path), "%s@%x", qdev_fw_name(dev),
  81              ((IDEBus*)dev->parent_bus)->bus_id);
  82
  83     return g_strdup(path);
  84 }
  85
  86 static void ide_qdev_realize(DeviceState *qdev, Error **errp)
  87 {
  88     IDEDevice *dev = IDE_DEVICE(qdev);
  89     IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
  90     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
  91
  92     if (dev->unit == -1) {
  93         dev->unit = bus->master ? 1 : 0;
  94     }
  95
  96     if (dev->unit >= bus->max_units) {
  97         error_setg(errp, "Can't create IDE unit %d, bus supports only %d units",
  98                      dev->unit, bus->max_units);
  99         return;
 100     }
 101
 102     switch (dev->unit) {
 103     case 0:
 104         if (bus->master) {
 105             error_setg(errp, "IDE unit %d is in use", dev->unit);
 106             return;
 107         }
 108         bus->master = dev;
 109         break;
 110     case 1:
 111         if (bus->slave) {
 112             error_setg(errp, "IDE unit %d is in use", dev->unit);
 113             return;
 114         }
 115         bus->slave = dev;
 116         break;
 117     default:
 118         error_setg(errp, "Invalid IDE unit %d", dev->unit);
 119         return;
 120     }
 121     dc->realize(dev, errp);
 122 }
 123
 124 IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
 125 {
 126     DeviceState *dev;
 127
 128     dev = qdev_create(&bus->qbus, drive->media_cd ? "ide-cd" : "ide-hd");
 129     qdev_prop_set_uint32(dev, "unit", unit);
 130     qdev_prop_set_drive(dev, "drive", blk_by_legacy_dinfo(drive),
 131                         &error_fatal);
 132     qdev_init_nofail(dev);
 133     return DO_UPCAST(IDEDevice, qdev, dev);
 134 }
 135
 136 int ide_get_geometry(BusState *bus, int unit,
 137                      int16_t *cyls, int8_t *heads, int8_t *secs)
 138 {
 139     IDEState *s = &DO_UPCAST(IDEBus, qbus, bus)->ifs[unit];
 140
 141     if (s->drive_kind != IDE_HD || !s->blk) {
 142         return -1;
 143     }
 144
 145     *cyls = s->cylinders;
 146     *heads = s->heads;
 147     *secs = s->sectors;
 148     return 0;
 149 }
 150
 151 int ide_get_bios_chs_trans(BusState *bus, int unit)
 152 {
 153     return DO_UPCAST(IDEBus, qbus, bus)->ifs[unit].chs_trans;
 154 }
 155
 156 /* --------------------------------- */
 157
 158 typedef struct IDEDrive {
 159     IDEDevice dev;
 160 } IDEDrive;
 161
 162 static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
 163 {
 164     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
 165     IDEState *s = bus->ifs + dev->unit;
 166     int ret;
 167
 168     if (!dev->conf.blk) {
 169         if (kind != IDE_CD) {
 170             error_setg(errp, "No drive specified");
 171             return;
 172         } else {
 173             /* Anonymous BlockBackend for an empty drive */
 174             dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
 175             ret = blk_attach_dev(dev->conf.blk, &dev->qdev);
 176             assert(ret == 0);
 177         }
 178     }
 179
 180     if (dev->conf.discard_granularity == -1) {
 181         dev->conf.discard_granularity = 512;
 182     } else if (dev->conf.discard_granularity &&
 183                dev->conf.discard_granularity != 512) {
 184         error_setg(errp, "discard_granularity must be 512 for ide");
 185         return;
 186     }
 187
 188     blkconf_blocksizes(&dev->conf);
 189     if (dev->conf.logical_block_size != 512) {
 190         error_setg(errp, "logical_block_size must be 512 for IDE");
 191         return;
 192     }
 193
 194     if (kind != IDE_CD) {
 195         if (!blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255,
 196                               errp)) {
 197             return;
 198         }
 199     }
 200     if (!blkconf_apply_backend_options(&dev->conf, kind == IDE_CD,
 201                                        kind != IDE_CD, errp)) {
 202         return;
 203     }
 204
 205     if (ide_init_drive(s, dev->conf.blk, kind,
 206                        dev->version, dev->serial, dev->model, dev->wwn,
 207                        dev->conf.cyls, dev->conf.heads, dev->conf.secs,
 208                        dev->chs_trans, errp) < 0) {
 209         return;
 210     }
 211
 212     if (!dev->version) {
 213         dev->version = g_strdup(s->version);
 214     }
 215     if (!dev->serial) {
 216         dev->serial = g_strdup(s->drive_serial_str);
 217     }
 218
 219     add_boot_device_path(dev->conf.bootindex, &dev->qdev,
 220                          dev->unit ? "/disk@1" : "/disk@0");
 221 }
 222
 223 static void ide_dev_get_bootindex(Object *obj, Visitor *v, const char *name,
 224                                   void *opaque, Error **errp)
 225 {
 226     IDEDevice *d = IDE_DEVICE(obj);
 227
 228     visit_type_int32(v, name, &d->conf.bootindex, errp);
 229 }
 230
 231 static void ide_dev_set_bootindex(Object *obj, Visitor *v, const char *name,
 232                                   void *opaque, Error **errp)
 233 {
 234     IDEDevice *d = IDE_DEVICE(obj);
 235     int32_t boot_index;
 236     Error *local_err = NULL;
 237
 238     visit_type_int32(v, name, &boot_index, &local_err);
 239     if (local_err) {
 240         goto out;
 241     }
 242     /* check whether bootindex is present in fw_boot_order list  */
 243     check_boot_index(boot_index, &local_err);
 244     if (local_err) {
 245         goto out;
 246     }
 247     /* change bootindex to a new one */
 248     d->conf.bootindex = boot_index;
 249
 250     if (d->unit != -1) {
 251         add_boot_device_path(d->conf.bootindex, &d->qdev,
 252                              d->unit ? "/disk@1" : "/disk@0");
 253     }
 254 out:
 255     error_propagate(errp, local_err);
 256 }
 257
 258 static void ide_dev_instance_init(Object *obj)
 259 {
 260     object_property_add(obj, "bootindex", "int32",
 261                         ide_dev_get_bootindex,
 262                         ide_dev_set_bootindex, NULL, NULL, NULL);
 263     object_property_set_int(obj, -1, "bootindex", NULL);
 264 }
 265
 266 static void ide_hd_realize(IDEDevice *dev, Error **errp)
 267 {
 268     ide_dev_initfn(dev, IDE_HD, errp);
 269 }
 270
 271 static void ide_cd_realize(IDEDevice *dev, Error **errp)
 272 {
 273     ide_dev_initfn(dev, IDE_CD, errp);
 274 }
 275
 276 static void ide_drive_realize(IDEDevice *dev, Error **errp)
 277 {
 278     DriveInfo *dinfo = NULL;
 279
 280     if (dev->conf.blk) {
 281         dinfo = blk_legacy_dinfo(dev->conf.blk);
 282     }
 283
 284     ide_dev_initfn(dev, dinfo && dinfo->media_cd ? IDE_CD : IDE_HD, errp);
 285 }
 286
 287 #define DEFINE_IDE_DEV_PROPERTIES()                     \
 288     DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
 289     DEFINE_BLOCK_ERROR_PROPERTIES(IDEDrive, dev.conf),  \
 290     DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
 291     DEFINE_PROP_UINT64("wwn",  IDEDrive, dev.wwn, 0),    \
 292     DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial),\
 293     DEFINE_PROP_STRING("model", IDEDrive, dev.model)
 294
 295 static Property ide_hd_properties[] = {
 296     DEFINE_IDE_DEV_PROPERTIES(),
 297     DEFINE_BLOCK_CHS_PROPERTIES(IDEDrive, dev.conf),
 298     DEFINE_PROP_BIOS_CHS_TRANS("bios-chs-trans",
 299                 IDEDrive, dev.chs_trans, BIOS_ATA_TRANSLATION_AUTO),
 300     DEFINE_PROP_UINT16("rotation_rate", IDEDrive, dev.rotation_rate, 0),
 301     DEFINE_PROP_END_OF_LIST(),
 302 };
 303
 304 static void ide_hd_class_init(ObjectClass *klass, void *data)
 305 {
 306     DeviceClass *dc = DEVICE_CLASS(klass);
 307     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
 308
 309     k->realize  = ide_hd_realize;
 310     dc->fw_name = "drive";
 311     dc->desc    = "virtual IDE disk";
 312     dc->props   = ide_hd_properties;
 313 }
 314
 315 static const TypeInfo ide_hd_info = {
 316     .name          = "ide-hd",
 317     .parent        = TYPE_IDE_DEVICE,
 318     .instance_size = sizeof(IDEDrive),
 319     .class_init    = ide_hd_class_init,
 320 };
 321
 322 static Property ide_cd_properties[] = {
 323     DEFINE_IDE_DEV_PROPERTIES(),
 324     DEFINE_PROP_END_OF_LIST(),
 325 };
 326
 327 static void ide_cd_class_init(ObjectClass *klass, void *data)
 328 {
 329     DeviceClass *dc = DEVICE_CLASS(klass);
 330     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
 331
 332     k->realize  = ide_cd_realize;
 333     dc->fw_name = "drive";
 334     dc->desc    = "virtual IDE CD-ROM";
 335     dc->props   = ide_cd_properties;
 336 }
 337
 338 static const TypeInfo ide_cd_info = {
 339     .name          = "ide-cd",
 340     .parent        = TYPE_IDE_DEVICE,
 341     .instance_size = sizeof(IDEDrive),
 342     .class_init    = ide_cd_class_init,
 343 };
 344
 345 static Property ide_drive_properties[] = {
 346     DEFINE_IDE_DEV_PROPERTIES(),
 347     DEFINE_PROP_END_OF_LIST(),
 348 };
 349
 350 static void ide_drive_class_init(ObjectClass *klass, void *data)
 351 {
 352     DeviceClass *dc = DEVICE_CLASS(klass);
 353     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
 354
 355     k->realize  = ide_drive_realize;
 356     dc->fw_name = "drive";
 357     dc->desc    = "virtual IDE disk or CD-ROM (legacy)";
 358     dc->props   = ide_drive_properties;
 359 }
 360
 361 static const TypeInfo ide_drive_info = {
 362     .name          = "ide-drive",
 363     .parent        = TYPE_IDE_DEVICE,
 364     .instance_size = sizeof(IDEDrive),
 365     .class_init    = ide_drive_class_init,
 366 };
 367
 368 static void ide_device_class_init(ObjectClass *klass, void *data)
 369 {
 370     DeviceClass *k = DEVICE_CLASS(klass);
 371     k->realize = ide_qdev_realize;
 372     set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
 373     k->bus_type = TYPE_IDE_BUS;
 374     k->props = ide_props;
 375 }
 376
 377 static const TypeInfo ide_device_type_info = {
 378     .name = TYPE_IDE_DEVICE,
 379     .parent = TYPE_DEVICE,
 380     .instance_size = sizeof(IDEDevice),
 381     .abstract = true,
 382     .class_size = sizeof(IDEDeviceClass),
 383     .class_init = ide_device_class_init,
 384     .instance_init = ide_dev_instance_init,
 385 };
 386
 387 static void ide_register_types(void)
 388 {
 389     type_register_static(&ide_bus_info);
 390     type_register_static(&ide_hd_info);
 391     type_register_static(&ide_cd_info);
 392     type_register_static(&ide_drive_info);
 393     type_register_static(&ide_device_type_info);
 394 }
 395
 396 type_init(ide_register_types)