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