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